CN105612243A - Heat recovery from a high pressure stream - Google Patents
Heat recovery from a high pressure stream Download PDFInfo
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- CN105612243A CN105612243A CN201480055082.8A CN201480055082A CN105612243A CN 105612243 A CN105612243 A CN 105612243A CN 201480055082 A CN201480055082 A CN 201480055082A CN 105612243 A CN105612243 A CN 105612243A
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- Prior art keywords
- pressure
- stream
- steam
- binder
- steam generator
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Classifications
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G45/00—Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B33/00—Steam-generation plants, e.g. comprising steam boilers of different types in mutual association
- F22B33/02—Combinations of boilers having a single combustion apparatus in common
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G49/00—Treatment of hydrocarbon oils, in the presence of hydrogen or hydrogen-generating compounds, not provided for in a single one of groups C10G45/02, C10G45/32, C10G45/44, C10G45/58 or C10G47/00
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G49/00—Treatment of hydrocarbon oils, in the presence of hydrogen or hydrogen-generating compounds, not provided for in a single one of groups C10G45/02, C10G45/32, C10G45/44, C10G45/58 or C10G47/00
- C10G49/22—Separation of effluents
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/08—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being steam
Abstract
A process for recovering heat from a high pressure stream during hydroprocessing, where one embodiment of the process includes serially introducing a high pressure stream from a hot separator into a first steam generator and a second steam generator; using the first steam generator to generate a medium pressure stream of steam, and then using the medium pressure stream as stripping steam. The process also includes using the second steam generator to generate a low pressure stream of steam, and then using the low pressure stream as stripping steam.
Description
Prioity claim
The application requires the U. S. application No.14/026 submitting on September 13rd, 2013,470 preferentialPower, is incorporated herein its full content by reference.
Invention field
The present invention relates generally to hydrotreating unit, relates more particularly to a kind of for by high binderFlow back to the hot method of receiving. In one embodiment, providing the high binder stream of heat is from heat separatorVapor stream, its for generation of can be used on separately other process in (for example dividing as stripper, productHeat up in a steamer in the assembly in tower and/or diesel oil side stripper and be used as stripped vapor) middle pressure steam and low pressure steamVapour.
Background of invention
Become extremely important for hydrotreating unit as the energy-optimised of hydrocracking unit, andThere is the driving force to minimum public work and maximum heat recovery. Inventor of the present invention has recognized that onePlant the method for utilizing heat separator steam to produce via steam and to make it realization. But, of the present inventionBright person also recognizes that security is large because hot junction is the reactor effluent under very high pressureProblem. Therefore, have required essential safety steam produce become important. By invention of the present inventionThe scheme of person's exploitation has realized this requirement, and embodiment is below being described.
Summary of the invention
In brief, in certain embodiments, the inventive method is a kind of for during hydrotreatmentFlow back to by high binder the hot method received, wherein the method embodiment comprises from thermal releaseThe high binder stream of device is introduced the first steam generator and the second steam generator successively; Use the first steamGenerator is to produce the middle binder stream of steam, and in using subsequently, binder flows as stripped vapor. The methodAlso comprise and use the second steam generator to produce the low binder stream of steam, use subsequently low binder stream to doFor stripped vapor.
In addition, in certain embodiments, the inventive method be for during hydrotreatment by high pressureThe method of Steam Recovery heat, it comprises the steps: to use heat separator to produce HCS material stream;Extract heat to produce middle pressure steam and low-pressure steam by HCS material stream subsequently. In some embodimentIn, make middle pressure steam be delivered to stripper, wherein middle pressure steam is used as stripped vapor, and low pressure is steamedVapour is delivered at least one in product fractionating column and diesel oil side stripper, and its low pressure steam is used asStripped vapor.
Finally, for reclaimed some reality of hot the inventive method by high steam during hydrotreatmentThe scheme of executing comprises makes high binder stream be delivered to the first container handling, and the first feedwater material stream is delivered toThe first container handling. By extract heat to be expected by the first feedwater by high binder stream in the first container handlingThe middle binder of the raw steam of miscarriage flows and the method is continued. The method also comprises flows by first high binderContainer handling is delivered to the second container handling and makes the second feedwater material stream be delivered to the second container handling.Finally, the method is included in the second container handling and extracts heat to be flowed by the second feedwater material by high binder streamProduce the low binder stream of steam.
Accompanying drawing summary
The preferred embodiments of the invention are described with reference to the drawings in this article, wherein:
Fig. 1 is for being flowed back to and received of hot the inventive method by high binder in hydrocracking unitThe example of embodiment.
Detailed Description Of The Invention
In brief, can be used for the inventive method in hydrotreating unit (as hydrocracking unit)In some embodiment, utilize the steam of two different pressures levels of heat separator steam generation, whereinA vapor stream is intended to stripped vapor (middle pressure steam) MLP that acts on stripper, another steamMaterial stream is intended to the stripped vapor (low-pressure steam) that acts on product fractionating column and diesel oil side stripper.Each steam generator will accurately produce the needed amount of stripping under desired level. From the volume of collectorOuter high steam is for compensating the needs of middle pressure steam, and when needed, as during starts andIn the deficiency of other situations when the generation of steam needs to(for) technical process, from the extra middle pressure of collectorSteam can be used for compensating the needs of low-pressure steam. If the steam generating produces more than needed,Pressure controller is by the material stream of cutting out from the compensation steam of collector.
But this is closed the pressure causing in steam generator and raises, the steam of this generation that raiseTemperature. Result is hot side fluid and will be reduced and will be produced more by the temperature difference between the water of its generation steamFew steam. This will be tending towards self-regulation steam and produce. Conventionally, steam generator is lower than the starting phaseBetween supply under the pressure of corresponding collector of steam and operate. For preventing from polluting corresponding supply collector, asFruit steam pressure raises and exceedes certain level, and high-voltage switch gear is closed isolating valve and returned collection to prevent vapor streamPipe. If existed by high-tension side tracheal rupture or seepage, closing of such valve prevents the dirt of steam collectorDye. Otherwise, described pipe seepage or break can cause hydrogen sulfide and other not condensables enter vapor collectionPipe, thus it polluted.
The in the situation that of tracheal rupture, the pressure in vapor can will raise and will activate high-voltage switch gear, itsTo be closed in subsequently the shut off valve in boiler feedwater (BFW) pipeline and discharge line, thereby at generatorCatch among itself from the fluid of the pipe that breaks and make the minimum contamination of boiler feedwater collector. Make switchThe setting pressure activating is BFW pump cut-out pressure. In certain embodiments, steam generatorDesign pressure is preferably set to 10/13 of pipe side (high pressure) design pressure. At steam generator by BFWPipeline, steam output pipe line, compensation pipes and discharge line separate steam generator after cutting offAnd if pressure reaches the setting pressure of pressure safety valve (PSV), the PSV on generator will beatOpen. If owing to there is tracheal rupture, hydrocarbon and hydrogen sulfide will be present in steam to be released, and makePipeline from PSV is delivered to the collector of releasing, instead of to atmosphere. Due to PSV pipeline is delivered toThe collector of releasing, have in the normal operation period that steam leaks to torch collector may, therefore existPSV upstream also provides rupture disk to stop a leak. Otherwise, if there is steam at colder temperatureLeak, may be because the ice accumulation collector that causes releasing stops up.
In the example of an embodiment, as shown in Figure 1, show that the inventive method is merged in to addHydrogen cracking unit. Hydrocracking unit, only shows and describes as known to persons of ordinary skill in the artThose technological process and the assemblies relevant to the inventive method, this is because those of ordinary skill in the artShould know how the inventive method can be incorporated to hydrocracking unit. Equally, should be noted that side of the present inventionMethod is not restricted to hydrocracking unit, but is alternately provided to the hydrotreating unit of other typesIn, and wherein wish to be flowed back in the processing unit of receiving hot other types by high binder.
Again rotate back into Fig. 1, the figure illustrates wherein by the HCS material stream from heat separator 1210 for to as the first steam generator as the enforcement of the first container handling of the first cooler 22Scheme. Also pay close attention to other embodiments, as comprise with by coming on comfortable shell-and-tube interchanger to installThe Natural Circulation of container and the shell-and-tube interchanger being arranged in parallel of mobile boiler feedwater exchanged heat.This container serves as insulating space so that the steam producing separates with the boiler feedwater of circulation. With which,Under uniform pressure, produce repeatedly using of steam and share shared separation container.
In the example of Fig. 1 embodiment, the pressure of material stream 10 can be at 500psi (gauge pressure) (34.5 bar (tablePress)) to the scope of 2800psi (gauge pressure) (154 bar (gauge pressure)), temperature can be at 400 °F (200 DEG C) extremelyIn the scope of 700 °F (370 DEG C). Certainly,, in other are set up, material stream can be in different pressures and temperatureUnder.
Before arriving the first cooler 22, can make material stream 10 by other assemblies, for example, by oneIndividual or a series of heat exchangers, to take out some heat for described other parts of method. Real at thisIn example, make material stream 10 first by heat exchanger 14 (as shell-and-tube exchanger), its heating process materialIn stream one, as fresh feed; Make subsequently it pass through another heat exchanger (as another shell-and-tube heat is handed overParallel operation) 16, it heats another material stream in described method, as recycle gas; And finally make it logicalOver-heat-exchanger 20, it heats another material stream in described method, as the charging to fractionation part. WhenSo, also pay close attention to other and set up, this depends on each temperature and pressure parameter and processing unit otherAssembly.
By after heat exchanger 14,16 and 20, the material stream 29 generating is carried at material stream 10To the first cooler 22, as mentioned above, wherein utilize it to provide heat with by by boiler feedwater (BFW)The boiler feedwater that pipeline 25 enters cooler 22 produces steam. Liquid level in the first cooler 22 is logicalCross fluid level controller (LIC) 17 monitorings that are associated with flow indicator controller 19 and valve 21, useBe delivered to the boiler feedwater of cooler 22 by boiler feedwater (BFW) pipeline 25 in regulation and controlAmount.
In the first cooler 22, make boiler feedwater change into steam by extracting heat by material stream 29,Obtain the generation material stream 24 of saturated vapor. In other embodiments, generating material stream 24 can for example existUnder the pressure of 100-400psi (gauge pressure) (7-28 clings to (gauge pressure)). Leave the first cooler 22 at generation material streamAfterwards, supplied to superheater 26. In the time that steam passes through superheater 26, make saturated vapor also overheatedLeave as material stream 27, it finally can, by after flow control valve 30, supply extremely by pipeline 31Stripper (not shown). Flow to the relevant stream of the flow of steam stripping tower top by regulating and monitor materialAmount indicator controller and control valve 30.
But, by pipeline 31 with the stripped vapor as in stripper before, make superheated steam withMaterial stream 33 from the high steam of collector mixes. In order to reach the desirable pressure of stripper (at thisIn situation, it is middle pressure steam), this embodiment is used relevant to PIC (PIC) 37The control valve 35 of connection, and the extra control valve 39 being associated with extra PIC41. Especially,After this material stream passes through superheater 26, but before merging with another material stream, PIC37 goes up on one pointThe pressure of monitoring material stream 27, and if the pressure of material stream 27 needs to increase (or minimizing) to reach logicalCross pipeline 31 and enter the desirable pressure of stripper, PIC37 opens (or partly or entirely closing)The high binder stream 33 that thereby valve 35 makes more (or still less) mixes with material stream 27.
In this embodiment, the middle binder stream of pipeline 31 can be 100psi (gauge pressure) (7 bar (gauge pressure))And any pre-selected press value between 400psi (gauge pressure) (28 bar (gauge pressure)).
If PIC41 measure pressure in pipeline 43 in predetermined value (for example,, at 140psi (gauge pressure) (10Bar (gauge pressure)) to the predetermined value between 300psi (gauge pressure) (21 bar (gauge pressure))) more than, high-voltage switch gear closesClose isolating valve 39 to prevent that vapor flow is to high pressure collector. If exist pipe to leak or break in high-pressure sideSplit, this sets up the pollution that has prevented steam collector because do not close isolating valve 39, pipe leak orDuring breaking hydrogen sulfide and other not condensables can enter steam collector, thereby pollute collector.
Pressure alarm system 100 (being pressure alarm (height/height) in this case) or PAHH andOne cooler 22 (the first steam generator) is associated. As known in the art, this pressure alarm system,The same with controller with other controls of mentioning herein, be conventionally associated with computer processor. This is years oldOne pressure alarm system 100 comprises the position of monitoring between the first cooler 22 and superheater 26The pressure indicator (PI) 102 of the pressure of material stream 24, also comprises shut off valve 104,106 and 108. AsThere is tracheal rupture in fruit, the pressure in the first cooler 22 will raise in the first cooler 22,And this rising will detect by pressure indicator 102. For example, once pressure reaches predeterminated level (140Psi (gauge pressure) (10 bar (gauge pressure)) is to the predetermined value between 300psi (gauge pressure) (21 bar (gauge pressure))), controllerThe high-voltage switch gear of following shut off valve is closed in activation: (a) shut off valve 104 (being associated with material stream 27), (b) closesClose valve 106 (being associated with discharge line 23), and (c) shut off valve 108 (with boiler feedwater pipeline 25 phasesAssociated). Therefore,, by these valves cut out, the fluid from the pipe that breaks is produced at the first steamAmong device itself, safety is caught.
In addition, once close shut off valve 104,106 and 108 and isolation the first steam generator (bagDraw together the first cooler 22 in this embodiment), if pressure reaches PSV setting pressure, structurePut and arrange pressure safety valve (PSV) 110 to open. Due in this embodiment, hydrocarbon and hydrogen sulfideAlso will during tracheal rupture, discharge, institute is so that expect that stream is flowed by material in the time opening by pressure safety valve 110112 are delivered to the collector (not shown) of releasing. But, owing to making in this embodiment material stream 112 carryTo the collector (not shown) of releasing, there is the possibility to the collector leaked steam of releasing, therefore this embodimentAlso preferably include rupture disk 114 or other equivalent of the apparatus, connect to eliminate this steam with PSV110Leak. If this steam leakage occurs at colder temperature, can cause torch collector to stop up.
In this embodiment, will be with described the first steam generator (comprising the first cooler 22)The steam generator design pressure that PSV setting pressure is identical is preferably set to pipe side design pressure10/13。
The embodiment of the present invention of Fig. 1 also comprises the second steam generator, as the second cooler 32. ByMaterial that the first cooler 22 leaves stream 60 as thermal source for producing steam at the second cooler 32.Certainly, produced the steam of material stream 24 by boiler feedwater owing to extracting some heat, leave first coolingThe temperature of the material stream 60 of device 22 is by the material stream 29 lower than entering the first cooler 22.
Flow 60 by the second cooler 32 and for after the second cooler produces steam at material,The material stream 62 being left by the second cooler 32, the material stream 64 that makes to generate be delivered to product condenser withFor other process (it be processing known to persons of ordinary skill in the art) before, can pass through one orMultiple heat exchangers or other assemblies. In the embodiment of Fig. 1, first material stream 62 is delivered to canThe interchanger 66 being associated with recycle gas material stream, then to receiving self cooling flash tank (not shown)The heat exchanger 68 of charging. Certainly, also pay close attention to other and set up, this depends on various temperature and pressuresOther assemblies of parameter and processing unit.
Finally, with discharge material stream 23 pipelines that are associated from the first cooler 22, except upper articles and opinionsOutside the valve 106 of the first pressure alarm system 100 of stating, also comprise valve 76. This valve 106 is for controlThe flow of system discharge material stream 23, it is called material stream 77 subsequently after by valve 106, and makes material stream 77Be delivered to blowdown vessel (not shown). In this embodiment, design meticulous discharge network for low pressure, because ofThis blowdown vessel will serve as the container with PSV, wherein can complete pressure drop.
The second steam generator (the second cooler) 32 with the first steam generator (the first cooler) 22Similar mode operates, therefore except some between two steam generators (cooler) of discussion are remarkableOutside difference, will describe no longer in more detail. In addition be associated with the second cooler 32, with respect toThe assembly of those of the first cooler 22 will be used similar reference numerals with flowing, and different is and theTwo coolers be associated those will comprise single apostrophe (') or two apostrophe (") symbol.
Utilize steam that the second cooler 32 produces flow and be associated with the first cooler 22 thatA little differences is to replace and makes the middle binder stream 31 generating pass to stripper (as use has firstThe first steam generator of cooler 22), but make (to there is the second cooler by the second steam generator32) the material levelling generating is capable of the conveying of two material stream, is called low binder stream 31' and low binder stream 31 ".In this embodiment, make material stream 31' be delivered to product fractionating column (not shown), make material stream 31 " carryTo diesel oil stripper (not shown). Material stream 31' and 31 " steam be used separately as product fractionating column and diesel oilStripped vapor in stripper. In this embodiment, will expect stream 31' and 31 " preferably set up at 15-20Under the concrete predetermined pressure of psi, but also pay close attention to other pressure, this depends on the desired use of described material stream.
And the first and second steam generators be associated flow between another difference the benefit providing is providedFill steam reach middle binder stream 31 (are associated with the first steam generator, comprise the first cooler 22) withAnd low binder stream 31' and 31 " (be associated with the second steam generator, comprise the second cooler 32) wishThe pressure of hoping. Especially, about middle binder stream 31, this material stream can with the height from collector of appropriate amountPress vapor mixing to flow 33 to obtain predetermined pressure via each valve as above and control by material.Similar control method is subsequently for low binder stream 31' and 31 ", different is to replace as required flowing by material33 accept supplementary high steam by collector, in this embodiment low binder stream 31' and 31 " as requiredAccept the supplementary middle pressure steam from collector.
Except above-indicated difference, with the second steam generator (comprising the second cooler 32) phaseAssociated assembly, as the second pressure alarm system 101', the second superheater 26' etc., with the first steamingThe corresponding substantially the same mode of assembly of vapour generator (comprising the first cooler 22) operates. Therefore,These assemblies do not need further discussion.
Specific embodiments
Although be described together with specific embodiments hereinafter, should understand this description and be intended to exampleAnd do not limit description above and the scope of appended claims.
The first embodiment of the present invention is for being flowed back to and received hot side by high binder during hydrotreatmentMethod, the method comprises that high binder stream is introduced to the first steam generator and second successively by heat separator to be steamedVapour generator; Use the first steam generator to produce the middle binder stream of steam, binder in using subsequentlyStream is as stripped vapor; And use the second steam generator to produce the low binder stream of steam, subsequentlyUse low binder to flow as stripped vapor. One embodiment of the invention are upper to this section in this sectionThe previous embodiment of the first embodiment in one, any or all, it further comprisesMake middle binder stream be delivered to stripper; And make low binder stream be delivered to product fractionating column and diesel oil side lineAt least one in stripper. One embodiment of the invention be in this section upper to this section firstIn the previous embodiment of embodiment one, any or all, wherein make one of low binder streamPart is delivered to product fractionating column, and makes a part for low binder stream be delivered to diesel oil side stripper.
The second embodiment of the present invention is for being flowed back to and received hot side by high binder during hydrotreatmentMethod, the method comprises: use heat separator to produce HCS material stream; By by HCS materialStream extracts heat and is flowed by the middle binder stream of the raw steam of HCS material miscarriage and the low binder of steam; In makingBinder stream is delivered to stripper, wherein middle binder stream is used as to stripped vapor; And make low binder stream defeatedDeliver at least one in product fractionating column and diesel oil sidepiece stripper, wherein low binder stream is used as to vapourCarry steam. One embodiment of the invention are elder generations of upper the second embodiment to this section in this sectionIn front embodiment one, any or all, wherein make a part for low binder miscarriage be delivered toThing fractionating column, and make a part for low binder stream be delivered to diesel oil side stripper. One of the present inventionEmbodiment be in the previous embodiment of upper the second embodiment to this section in this section one,Any or all, it further comprises that the HCS material stream making from heat separator is delivered to firstSteam generator, and extract heat by high binder stream and flow to form middle pressure steam material; Make to produce at the first steamIn raw device, extract hot HCS material stream by it and be delivered to the second steam generator; And use secondSteam generator, to extract extra heat by high binder stream, flows thereby form low-pressure steam material. The present inventionAn embodiment be in the previous embodiment of upper the second embodiment to this section in this sectionOne, any or all, it is further included between heat separator and the first steam generator and carriesFor at least one first heat exchanger, and utilize at least one first heat exchanger to be carried by high binder streamHeat-obtaining; And at least one second heat exchanger is provided after the second steam generator, and utilizeAt least one second heat exchanger extracts extra heat by high binder stream. One embodiment of the inventionBe in the previous embodiment of upper the second embodiment to this section in this section one, any orAll, it is further included in middle pressure steam superheater is provided between the first steam generator and stripper,And make to carry by middle pressure steam superheater from the middle binder stream of the first steam generator; AndProvide low-pressure steam superheater after the second steam generator, and make from the second steam generatorLow binder stream is carried by low-pressure steam superheater. One embodiment of the invention be in this section on extremelyIn the previous embodiment of the second embodiment in this section one, any or all, it enters oneStep comprises provides the pressure alarm system of setting up and arranging to activate and boiler feedwater under predetermined high pressure valueThe valve that pipeline is associated, wherein boiler feedwater pipeline by boiler feedwater offer the first steam generator andThe second steam generator; And in the time that pressure alarm system detects that pressure has reached predetermined high pressure value,Activate the valve that is associated with boiler feedwater pipeline, to stop boiler feedwater to the first steam generator and theFlowing of two steam generators. One embodiment of the invention be in this section upper to this section secondIn the previous embodiment of embodiment one, any or all, its further comprise control,The computer processor that use is set up and arranged, to control at least one valve, makes to enter the middle pressure of stripperThe pressure of material stream is under the first predetermined pressure of 130psi (gauge pressure) (9 bar (gauge pressure)); Control, use structureThe computer processor of putting and arranging, to control at least one valve, makes to enter product fractionating column and diesel oil vapourThe pressure of the low binder stream of at least one in stripper at 15psi (gauge pressure) (1 bar (gauge pressure)) to 20The second predetermined pressure between psi (gauge pressure) (1.4 bar (gauge pressure)). One embodiment of the invention are theseIn section in the previous embodiment of upper the second embodiment to this section one, any or all,Wherein in control during the pressure of binder stream, the supplementary high binder of controlling high steam flow with middle pressureMaterial flows merging and reaches the first predetermined pressure; And during controlling the pressure of low binder stream, in controlPress the middle binder stream of supplementing of steam to reach the second predetermined pressure to merge with low binder stream. Of the present inventionEmbodiment is one in the previous embodiment of upper the second embodiment to this section in this sectionIndividual, any or all, it further comprises merges with to vapour middle binder stream and high pressure collector steamStripper provides the stream of the material under predetermined pressure; Low binder stream and middle pressure collector steam are merged with to diesel oil sideLine stripper provides the stream of the material under predetermined pressure; And make low binder stream and middle pressure collector steam merge withProvide the stream of the material under predetermined pressure to product fractionating column. One embodiment of the invention be in this section onTo one in the previous embodiment of the second embodiment in this section, any or all, whereinThe first steam generator comprises the first cooler; The second steam produces generator and comprises the second cooler.
The 3rd embodiment of the present invention is for being flowed back to and received hot side by high binder during hydrotreatmentMethod, the method comprises: make high binder stream be delivered to the first container handling; The first feedwater material stream is carriedTo the first container handling; In the first container handling, extract heat to be flowed by the first feedwater material by high binder streamProduce the middle binder stream of steam, make high binder stream be delivered to the second container handling by the first container handling;Make the second feedwater material stream be delivered to the second container handling; And flowed by high binder in the second container handlingExtract heat to be flowed by the low binder of the raw steam of the second feedwater material miscarriage. One embodiment of the invention areIn this section in the previous embodiment of upper the 3rd embodiment to this section one, any or instituteHave, the first pressure alarm providing by the pressure activated more than the first predeterminated level is further provided for itSystem, wherein the first pressure alarm system flow to the stream of the first container handling by stopping the first feedwater materialMobile first container handling of isolating moving and that flow by stopping middle binder; And provide by secondThe second pressure alarm system of pressure activated more than predeterminated level, wherein the second pressure alarm system is logicalCross and stop that the second feedwater material flow to flowing of the second container handling and by stopping flowing of low binder streamAnd isolation the second container handling. One embodiment of the invention be in this section upper to this section the 3rdIn the previous embodiment of embodiment one, any or all, it further comprises makes middle pressureMaterial stream is delivered to the first superheater to produce the first overheated material stream of middle pressure steam; Use the first overheated materialStream is as stripped vapor; Make low binder stream be delivered to the second superheater to produce the second overheated material stream; WithAnd use the second overheated material to flow as stripped vapor. One embodiment of the invention be in this section on extremelyIn the previous embodiment of the 3rd embodiment in this section one, any or all, it enters oneStep comprises and uses the first pressure alarm system to stop from the first row blowing stream of the first container handlingFlow; And use the second pressure alarm system to stop the second row blowing from the second container handlingFlowing of stream. One embodiment of the invention are upper the 3rd embodiments to this section in this sectionPreviously in embodiment, any or all, it further comprises provides by predetermined firstThe first pressure alarm system of pressure activated more than level, wherein the first pressure alarm system is by stoppingOnly the first feedwater material flow to flowing of the first container handling and by stopping flowing of middle binder stream everyFrom the first container handling; Be determined at the of middle binder stream between the first container handling and the first superheaterOne pressure, and by the first pressure and the first predetermined pressure comparison; If it is first pre-that the first pressure exceedesConstant-pressure, activates the first pressure alarm system; Provide by the pressure more than the second predeterminated level and touchThe second pressure alarm system of sending out, wherein the second pressure alarm system flow to by stopping the second feedwater materialMobile second container handling of isolating that flows and flow by stopping low binder of the second container handling;Be determined at the second pressure of the low binder stream between the second container handling and the second superheater, and make theTwo pressure and the second predetermined pressure comparison; And if the second pressure exceedes the second predetermined pressure, swashThe second pressure alarm system alive. One embodiment of the invention be in this section upper to this section the 3rdIn the previous embodiment of embodiment one, any or all, it further comprises provides pipeLine is so that be delivered to from the first effluent material stream of the first container handling the collector of releasing; Provide and set up alsoArrange the first safety valve normally to close, but activate time allow that first effluent stream flows is to letting outPut collector; Pipeline is provided and is delivered to so that flow out material flow from second of the second container handling the collection of releasingPipe; Provide the second safety valve of setting up and arranging normally to close, but allow the second outflow in the time activatingMaterial flow flows to the collector of releasing. One embodiment of the invention be in this section upper to this section theIn the previous embodiment of three embodiments one, any or all, if wherein activated theIf a pressure alarm system and reached the pressure of the first predetermined pressure safety valve, activates firstSafety valve is to allow first effluent stream flows; And if activated the second pressure alarm system withAnd if reached the pressure of the second predetermined pressure safety valve, activate the second safety valve to allow secondEffluent stream flows.
No longer further describe, it is believed that those skilled in the art utilize the previous description can maximum limitDegree ground uses the present invention and is easy to determines essential characteristic of the present invention, to make various variation of the present inventionWith revise and make it be suitable for various uses and condition, and do not depart from its spirit and scope. Therefore should understandPreferred specific embodiments is only exemplary, and does not limit the present invention in any way openThe remainder of content, and be intended to cover the various variations that comprise within the scope of appended claimsWith equivalent setting.
Hereinbefore, unless otherwise indicated beyond, all temperature are degree Celsius, all parts and percentageBy weight.
Claims (10)
1. for reclaim a hot method, described method by high binder stream [10] during hydrotreatmentComprise:
Use heat separator [12] to produce HCS material stream [10];
By extracting heat by HCS material stream by the middle binder stream [31] of the raw steam of HCS material miscarriage andThe low binder stream of steam [31 ', 31 "];
Make middle binder stream [31] be delivered to stripper, wherein middle binder stream is used as to stripped vapor; And
Make low binder stream [31 ', 31 "] be delivered at least one in product fractionating column and diesel oil side stripper,Wherein low binder stream is used as to stripped vapor.
2. make a part for low binder stream be delivered to product fractionation according to the process of claim 1 whereinTower [31 '] and make the part of low binder stream be delivered to diesel oil side stripper [31 "].
3. according to the method for claim 1, it further comprises:
Make to be delivered to the first steam generator [22] from the HCS material stream [10] of heat separator [12], and byHigh binder stream extracts heat to form middle pressure steam material stream [31];
Make in the first steam generator [22], to extract hot HCS material stream by it and be delivered to the second steamGenerator [32]; And
Use the second steam generator [32] to extract extra heat by high binder stream, thereby form low-pressure steamMaterial stream.
4. according to the method for claim 3, it further comprises:
At least one first heat exchanger [14] is provided between heat separator and the first steam generator [22], andUtilize at least one first heat exchanger [14] to extract heat by high binder stream; And
Provide afterwards at least one second heat exchanger [66] at the second steam generator [32], and utilize at least oneIndividual the second heat exchanger [66] extracts extra heat by high binder stream.
5. according to the method for claim 3, it further comprises:
Middle pressure steam superheater [26] is provided between the first steam generator [22] and stripper, and makes middle binderStream is carried by middle pressure steam superheater [26 '] by the first steam generator [22]; And
Provide afterwards low-pressure steam superheater [26 '] at the second steam generator [32], and make low binder stream by theTwo steam generators [32] are carried by low-pressure steam superheater [26 '].
6. according to the method for claim 1, it further comprises:
Pressure alarm system [100,100 '] is provided, its through set up and arrange with under predetermined high pressure value activate withThe valve [108] that boiler feedwater pipeline [25] is associated, wherein boiler feedwater pipeline [25] supplies boiler feedwater extremelyThe first steam generator [22] and the second steam generator [32]; And
In the time that pressure alarm system [100,100'] detects that pressure has reached predetermined high pressure value, activate and boilerThe valve [108] that water-supply line [25] is associated, to stop boiler feedwater to the first steam generator [22] andFlowing of two steam generators [32].
7. according to the method for claim 1, it further comprises:
Control, use through setting up and arrange to control the computer processor of at least one valve [39], make to enterThe gauge pressure pressure of the middle binder stream [31] of stripper is in the first predetermined pressure of 130psi (9 bar, gauge pressure)Under; And
Control, use through setting up and arrange to control the computer processor of at least one valve [39'], make to enterThe gauge pressure of the low binder stream of at least one in product fractionating column and diesel oil side stripper [31', 31 "] is pressedPower is under the second predetermined pressure of 15psi (1 bar, gauge pressure) and 20psi (1.4 bar, gauge pressure).
8. according to the method for claim 7, wherein:
In control during the pressure of binder stream [31], the supplementary high binder of controlling high steam flows [33] so that itsReach the first predetermined pressure with middle binder stream [31] merging; And
During controlling the pressure of low binder stream [31', 31 "], control binder stream [31'] in the supplementing of middle pressure steam[31', 31 "] merge and reach the second predetermined pressure so that itself and low binder stream.
9. according to the method for claim 1, it further comprises:
Binder stream [31] and high pressure collector steam [33] are merged so that the material under predetermined pressure to be provided to stripperStream;
Low binder stream [31 "] is merged to provide predetermined to diesel oil side stripper with middle pressure collector steam [31']Material stream under pressure; And
Low binder stream [31'] and middle pressure collector steam are merged to provide the material under predetermined pressure to product fractionating columnStream.
10. according to the method for claim 3, wherein:
The first steam generator comprises the first cooler [22]; With
The second steam generator comprises the second cooler [32].
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US14/026,470 | 2013-09-13 | ||
| US14/026,470 US20150075450A1 (en) | 2013-09-13 | 2013-09-13 | Heat recovery from a high pressure stream |
| PCT/US2014/036937 WO2015038199A1 (en) | 2013-09-13 | 2014-05-06 | Heat recovery from a high pressure stream |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105612243A true CN105612243A (en) | 2016-05-25 |
Family
ID=52666120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201480055082.8A Pending CN105612243A (en) | 2013-09-13 | 2014-05-06 | Heat recovery from a high pressure stream |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20150075450A1 (en) |
| EP (1) | EP3044291B1 (en) |
| CN (1) | CN105612243A (en) |
| RU (1) | RU2638579C2 (en) |
| WO (1) | WO2015038199A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11549072B1 (en) * | 2021-09-13 | 2023-01-10 | Axens | Overpressure protection in hot high pressure processing systems in multi-stage up-flow reactor systems |
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- 2014-05-06 CN CN201480055082.8A patent/CN105612243A/en active Pending
- 2014-05-06 EP EP14844081.1A patent/EP3044291B1/en active Active
- 2014-05-06 WO PCT/US2014/036937 patent/WO2015038199A1/en active Application Filing
- 2014-05-06 RU RU2016113251A patent/RU2638579C2/en active
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| US2901887A (en) * | 1953-10-31 | 1959-09-01 | Sulzer Ag | System for starting and temporarily taking the load off a steam power plant having multistage reheating |
| US3033538A (en) * | 1956-06-11 | 1962-05-08 | Babcock & Wilcox Co | Fluid heaters |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2015038199A1 (en) | 2015-03-19 |
| EP3044291B1 (en) | 2021-10-20 |
| US20150075450A1 (en) | 2015-03-19 |
| EP3044291A4 (en) | 2017-05-10 |
| RU2638579C2 (en) | 2017-12-15 |
| RU2016113251A (en) | 2017-10-11 |
| EP3044291A1 (en) | 2016-07-20 |
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