EP0000238A1 - A method of converting a sulphur-containing fuel to a substantially sulphur-free combustible gas - Google Patents
A method of converting a sulphur-containing fuel to a substantially sulphur-free combustible gas Download PDFInfo
- Publication number
- EP0000238A1 EP0000238A1 EP78300003A EP78300003A EP0000238A1 EP 0000238 A1 EP0000238 A1 EP 0000238A1 EP 78300003 A EP78300003 A EP 78300003A EP 78300003 A EP78300003 A EP 78300003A EP 0000238 A1 EP0000238 A1 EP 0000238A1
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- EP
- European Patent Office
- Prior art keywords
- solids
- amount
- combustible gas
- gas product
- sulphur
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
- C01B3/02—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen
- C01B3/22—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by decomposition of gaseous or liquid organic compounds
- C01B3/24—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by decomposition of gaseous or liquid organic compounds of hydrocarbons
- C01B3/28—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by decomposition of gaseous or liquid organic compounds of hydrocarbons using moving solid particles
- C01B3/30—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by decomposition of gaseous or liquid organic compounds of hydrocarbons using moving solid particles using the fluidised bed technique
-
- 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
- C10G2400/00—Products obtained by processes covered by groups C10G9/00 - C10G69/14
- C10G2400/26—Fuel gas
Definitions
- the prasent invention ralates to the conversion of sulphur-containing fuei into a substantially sulphur-free combustible gas and was made in the course of work performed under a contract with the United States Environmental Protection Agencv.
- sulphur-containing fuels such as hydrocarbonaceous solids (e.g. coal)
- hydrocarbon liquids ranging from semi-liquids such as tar or tar-containing materials to fuel oils and lighter hydrocarbon substances and hydrocarbon gases and even substances such as sulphur-containing gases, either singly or in any feasible combination
- sulphur-containing fuels such as hydrocarbonaceous solids (e.g. coal)
- hydrocarbon liquids ranging from semi-liquids such as tar or tar-containing materials to fuel oils and lighter hydrocarbon substances and hydrocarbon gases and even substances such as sulphur-containing gases, either singly or in any feasible combination
- substantially sulphur-free gas by at least partial combustion within a bed of particles containing calcium oxide fluidized by an upwardly-passing free oxygen-containing gas at suitable elevated fuel conversion temperatures. See, for example, U.K. patent specification No. 1336563.
- the proportion of free oxygen relative to fuel is high, in stoichiometric terms, the fuel is converted to a substantially sulphur-free fuel gas with the evolution of the heat of combustion of the fuel, If the proportion of free oxygen relative to the fuel is less than stoic- hiomatric, the fuel is partially combusted or "gasified" and the resulting substantially sulphur-free gases are combustible.
- the amount of heat liberated depends on the relative proportions of oxygen and fuel and in the case of heavier fuels such as heavy fuel oil, for example, the amount of heat liberated is just sufficient to maintain the bed at fuel conversion temperatures with good sulphur retention in the bed particles when the oxygen is about 30% of the sroichiometric proportion.
- the quantity of fines produced by the bed may be reduced by a proper selection of the material of the bed particles, by (inter alia) regulating the superficial velocity of the fluidizing gases through and above the bed below contain velocities, and the passage of elutriated and entrained particles to downstream equipment is reduced by circulating the substantially sulphur-free gas through particles-arresting devices such as cyclones or other apparatus having particle-retaining functions.
- the amount of sulphur associated with fuel entering the fluidized bed increases, e.g. due to an increase in the amount of fuel supplied to the bed to provide an increased amount of substantially sulphur-free gas and/or due to an increase in the sulphur content of the fuel, the amount of sulphur in the combustible gas leaving the bed tends to increase.
- Such an increase may be sufficiently small to be acceptable in the gas, but if it is not acceptable, steps must be taken to reduce the sulphur content of the gas produced in the bed.
- a number of expedients may be adopted to reduce the sulphur content of the gas to a level not exceeding the acceptable upper limit.
- the amount of calcium oxide in may be increased by adding particles containing calcium oxide or having a sulphur content above the normal acceptable limit) to reducethe amount of sulphur supplied to the converation bed either (a) by changing to a fuel of lower sulphur content or (b) by reducing the fuel input.
- expedient (a) requires the provision of a relatively low sulphur fuel in addition to the fuel undergoing conversion, and apart from the additional storage space required, the qualify of the ans may differ appreciably from the desired gas product. Expedieat (b) may necessitate reducing the operating capacity of equipment using the gas product.
- a method of converting a sulphur-containing fuel to a substantially sulphur-free combustible gas product and of maintaining the amount of sulphur in the gas product below a selected level comprising gasifying the sulphur-containing fuel in gasification equipment under gasification conditions least some solids comprise alkaline earth metal oxide whereby a combustible gas of low sulphur content containing no more than a minor proportion of entrained fins solids leaves the dense phase bed and wherein the said combustible gas is caused to pass through a solids separation device whereby at least some of the entrained fine solids are separated from the combustible gas and a combustible gas product of low sulphur content and of reduced solids content is discharged from the separation device, in which when the amount of sulphur in the combustible gas product is at least at the said selected level and the operating conditions of the said said gasification equipment include at least one limiting condition which is
- the monitoring of the amount of fines may be effected in any convenient manner of which the following are given by way of non-limitat, examples only:
- the rate of retention or accumulation of solids in the device is monitored and a signal representative of such retention or accumulation rate is employed to regulate the amount of fines in the gas.
- the rate of increase in weight of a filter element or device may.be monitored, or the rate of fines retention in the dipleg or catchpot of a cyclone.
- the signal employed to regulate the amount of fines in the gas may be generated directly or inferentially - e.g. by measuring a property of the gas which varies with the amount of solids therein (for instance, an electrical property such as the electrical capacitance of the gas or an accoustic property or a light-transmitting or reflecting property).
- the fines-containing converted gases are passed through a fines separation device such as a cyclone, the separated fines are passed to a solids outlet conduit, such as the dipleg of the cyclone, and the temperature of the solids in the outlet conduit is monitored. It has been noted that this temperature bears an adequately close relationship to the amount of fines in the fines-containing converted gas to be used to generate a fines-regulating signal of sufficient accuracy for most operations.
- the separated and thus recovered fines may be returned, at least in part, to the fluidized fuel-conversion bed, and/or to the freeboard dilute phase above the bed, in accordance with the requirement for fines to increase sulphur removal from the gases leaving the bed.
- the amount of fines elutriatable from the bed may be increased by increasing the velocity of gas through the bed, by the addition of fines from another source to the bed, by the attrition of bed particles preferably within the bed, e.g. using nigh velocity jets of gas (such as air) or by the addition to the bed of a substance which, at the bed conditions, generates fines.
- a material is, e.g., a limestone or like substance which decrepitates.
- the fines-regulating signal (however derived) is employed to regulate the amount of fines in the gas leaving the bed.
- fines may be added directly to gas which has already left the bed.
- the fines may help to reduce any tendency of deposits to build up on the surfaces of ducts and conduits through which they pass, thereby reducing the flow resistance of gas to downstream equipment.
- the sulphur-containing fuel (e.g. high sulphur, heavy fuel oil)- is passed from a storage station 11 via a suitable regulating valve 12 into a bed 13 of fluidizable particles comprising calcium oxide contained in a gasifier vessel 14.
- the bed 13 is supported on a suitable air distributor plate 15, and air is passed into the bed 13 via the plate 15 from a fan 16 at a rate determined by the setting of an air valve 17.
- the air fluidizes the particles in the bed 13 and converts the fuel into combustible gas of low sulphur content at a temperature in the range 800°C to 1100°C, preferably 880 to 920°C (e.g. about 900°C), sulphur being fixed in particles of the bed as calcium sulfide and other nonvolatile solid of sulphur.
- the combustible gas passes out of the bed 13 via the top surface 18 thereor into the freeboard space 19 in the vessel 14 above the bed 13 and elutriates a certain amount of fine solids from the bed, the amount depending, inter alia, on the nature of the bed particles and the superficial velocity of gas through the bed.
- the combustible gas and entrained solids is conducted from the vessel 14 to gas utilization equipment 20 such as a burner associated with a heat recovery device (e.g. a boiler) via a conduit 21, a cyclone separator 22 and a conduit 23.
- the gas after use in equipment 20 is discharged therefrom via conduit 24.
- the cyclone separator 22 separates at least some entrained solids from the combustible gas, and the separated solids pass into a dipleg 25 which communicates with a return conduit 26 and a store conduit 27, which conduits have respective solids flow regulating devices 28, 29 to regulate the amounts of solids passing thereinto from the dipleg 25.
- the return conduit 26 directs solids into the bed 13 for re-use, and there may be suitable equipment (not shown) of any type known in the art for promoting the passage of solids through conduit 26 into the bed 13.
- the store conduit 27 directs solids into a store 30 and the bottom of the latter is connected to a dumping valve 31 (normally closed) and also to a recycle valve 32 (normally open).
- a recycle valve 32 normally open
- solids are caused to pass via the recycle valve 32 and a recycle conduit 33 to a solids storage hopper 34 which is constructed and arranged for passing solids into the vessel 14; e.g. into the freeboard space 19 via a conduit 35 and a valve 36.
- the sulphur content of the combustible gas produced in bed 13 is measured in any convenient manner.
- the bed 13 e.g. by causing the addition of further particles comprising calcium oxide to the bed 13 up to the maximum design level of, or pressure drop through, the bed 13.
- Other actions may be caused to take place either alternatively or additionally up to limiting values, but the increase in sulphur-retaining bed material is referred to here as one typical but non-limitative action.
- steps are initiated to increase the concentration of fine solids in the combustible gas and thereby reduce the amount of sulphur in the gas in accordance with the discovery on which the present invention is based.
- concentration of fine solids in the combustible gas can be increased as will be appreciated by those skilled in the art.
- valve 36 may be opened to admit fine solids into vessel 14 from hopper 34.
- valve 29 may be closed and valve 28 opened so that solids recovered in the cyclone 22 are returned to the bed 13 via return conduit 26.
- the foregoing actions may be regulated directly and/or indirectly by the signals produced at monitor 37 from a suitable controlier 40.
- the addition of fine solids to the bed 13 or freeboard space 19 may not necessarily produce the desired amount of entrained solids in the combustible gas, and suitable equipment for monitoring the entrained solids rate may be incorporated in the installation.
- suitable equipment for monitoring the entrained solids rate may be incorporated in the installation.
- the temperature of the dipleg 25 or of solids therein bears a strong correlation to the amount of entrained solids. This observation is exploited in the illustrated embodiment wherein a temperature sensor 41 monitors the dipleg temperature and influences the opening and closing of valve 36 either alone or by modulating the signal passing to valve 36 from the controller 4Q.
- the signal from temperature sensor 41 may also or alternatively be employed to regulate the opening and closing of valves 28 and 29.
- a solids dump valve 42 is provided for dumping particles from a zone of bed 13 immediately above the distributor 15.
Abstract
Description
- The prasent invention ralates to the conversion of sulphur-containing fuei into a substantially sulphur-free combustible gas and was made in the course of work performed under a contract with the United States Environmental Protection Agencv.
- It is known that sulphur-containing fuels, such as hydrocarbonaceous solids (e.g. coal), hydrocarbon liquids ranging from semi-liquids such as tar or tar-containing materials to fuel oils and lighter hydrocarbon substances and hydrocarbon gases and even substances such as sulphur-containing gases, either singly or in any feasible combination, can be converted to substantially sulphur-free gas by at least partial combustion within a bed of particles containing calcium oxide fluidized by an upwardly-passing free oxygen-containing gas at suitable elevated fuel conversion temperatures. See, for example, U.K. patent specification No. 1336563.
- If the proportion of free oxygen relative to fuel is high, in stoichiometric terms, the fuel is converted to a substantially sulphur-free fuel gas with the evolution of the heat of combustion of the fuel, If the proportion of free oxygen relative to the fuel is less than stoic- hiomatric, the fuel is partially combusted or "gasified" and the resulting substantially sulphur-free gases are combustible. The amount of heat liberated depends on the relative proportions of oxygen and fuel and in the case of heavier fuels such as heavy fuel oil, for example, the amount of heat liberated is just sufficient to maintain the bed at fuel conversion temperatures with good sulphur retention in the bed particles when the oxygen is about 30% of the sroichiometric proportion.
- The conversion of sulphur-containing fuel as described above is performed in a dense phase fluidized bed of the calcium oxide-containing particles, bed operations, a certain particles ("fines") tends to be elutriated out of the bed Since the gases are employed in downstream equipment such aa burnars, heat recovery devices and similar equipment eitner singly or in combination, and such equipment tends to be reduced in efficiency and/or may be damaged by the passage thereinto and therethrough of such fines, steps have been taken to reduce the quantity of fines elutriated from the dense phase bed and also to reduce to an acceptable level the passage of such elutriated fines passing to the downstream equipment and to avoid venting gas containing fines to the atmosphere. Thus, the quantity of fines produced by the bed may be reduced by a proper selection of the material of the bed particles, by (inter alia) regulating the superficial velocity of the fluidizing gases through and above the bed below contain velocities, and the passage of elutriated and entrained particles to downstream equipment is reduced by circulating the substantially sulphur-free gas through particles-arresting devices such as cyclones or other apparatus having particle-retaining functions.
- If the amount of sulphur associated with fuel entering the fluidized bed increases, e.g. due to an increase in the amount of fuel supplied to the bed to provide an increased amount of substantially sulphur-free gas and/or due to an increase in the sulphur content of the fuel, the amount of sulphur in the combustible gas leaving the bed tends to increase. Such an increase may be sufficiently small to be acceptable in the gas, but if it is not acceptable, steps must be taken to reduce the sulphur content of the gas produced in the bed. A number of expedients may be adopted to reduce the sulphur content of the gas to a level not exceeding the acceptable upper limit. For example, the amount of calcium oxide in may be increased by adding particles containing calcium oxide or having a sulphur content above the normal acceptable limit) to reducethe amount of sulphur supplied to the converation bed either (a) by changing to a fuel of lower sulphur content or (b) by reducing the fuel input. In many circumstances, neither of these convenient since expedient (a) requires the provision of a relatively low sulphur fuel in addition to the fuel undergoing conversion, and apart from the additional storage space required, the qualify of the ans may differ appreciably from the desired gas product. Expedieat (b) may necessitate reducing the operating capacity of equipment using the gas product.
- It has now been discovered, and this forms the basis of the invention, that the amount of fines in the converted gas leaving the conversion bed influences the amount of sulphur in the converted gas.
- According to the invention, there is provided a method of converting a sulphur-containing fuel to a substantially sulphur-free combustible gas product and of maintaining the amount of sulphur in the gas product below a selected level, the method comprising gasifying the sulphur-containing fuel in gasification equipment under gasification conditions least some solids comprise alkaline earth metal oxide whereby a combustible gas of low sulphur content containing no more than a minor proportion of entrained fins solids leaves the dense phase bed and wherein the said combustible gas is caused to pass through a solids separation device whereby at least some of the entrained fine solids are separated from the combustible gas and a combustible gas product of low sulphur content and of reduced solids content is discharged from the separation device, in which when the amount of sulphur in the combustible gas product is at least at the said selected level and the operating conditions of the said said gasification equipment include at least one limiting condition which is limiting with respect to reducing the amount of sulphur in the combustible gas product, there is caused to be a regulated increase in the total amount of solids entrained in and/or associated with the combustible gas passing to the solids separation device, at least some of the said total amount of solids is separated from the ccsbustible gas by means of the separating device and a combustible gas product having a sulphur content below the said selected level is discharged from the separating device, at least some of the solids separated by the separating device are transferred from the separating device to the dense phase fluidized bed, the said reaulated increase in the said total amount of solids being regulated in accordance with the sulfur content of the combustible gas product, or the sulphur content of gases (e.g. flue gases) derived therefrom.
-
- It is preferred for most downstream equipment e.g. purpers beat recovery devices, inter alia, that the converted gases be substantially freed of the fines upstream of the equipment.
- In order to produce a converted gas having in seceptable low sulphur content without employing more fines than is necessary (since this entails a greater load on the fines-retaining solids separation equipment, and also on equipment for disposing of and/or recirculating the thus retained fines), it is desirable to moitor the amount of fines in the converted gases and to regulate the amount accoraingly.
- The monitoring of the amount of fines may be effected in any convenient manner of which the following are given by way of non-limitat, examples only:
- In one method, converted gas is caused to impinge on a pivoted or hinged member and deflections of the latter from a datum position indicate the fines content of the gas. A signal is generated whose magnitude is representative of the deflection of the member, and the signal is employed to regulate the amount of fines in the gas.
- In another method, wherein the fines-containing zas is passed through a fines-retaining device which separates fines from the gas to give a substantially sulphur-free, substantially solids-free gas, the rate of retention or accumulation of solids in the device is monitored and a signal representative of such retention or accumulation rate is employed to regulate the amount of fines in the gas. Thus, the rate of increase in weight of a filter element or device may.be monitored, or the rate of fines retention in the dipleg or catchpot of a cyclone. The signal employed to regulate the amount of fines in the gas may be generated directly or inferentially - e.g. by measuring a property of the gas which varies with the amount of solids therein (for instance, an electrical property such as the electrical capacitance of the gas or an accoustic property or a light-transmitting or reflecting property).
- In accordance with a preferred embodiment of the invention, the fines-containing converted gases are passed through a fines separation device such as a cyclone, the separated fines are passed to a solids outlet conduit, such as the dipleg of the cyclone, and the temperature of the solids in the outlet conduit is monitored. It has been noted that this temperature bears an adequately close relationship to the amount of fines in the fines-containing converted gas to be used to generate a fines-regulating signal of sufficient accuracy for most operations.
- The separated and thus recovered fines may be returned, at least in part, to the fluidized fuel-conversion bed, and/or to the freeboard dilute phase above the bed, in accordance with the requirement for fines to increase sulphur removal from the gases leaving the bed.
- In addition and/or alternatively, the amount of fines elutriatable from the bed may be increased by increasing the velocity of gas through the bed, by the addition of fines from another source to the bed, by the attrition of bed particles preferably within the bed, e.g. using nigh velocity jets of gas (such as air) or by the addition to the bed of a substance which, at the bed conditions, generates fines. Such a material is, e.g., a limestone or like substance which decrepitates. Any combination of the foregoing expedients may be employed, and the fines-regulating signal (however derived) is employed to regulate the amount of fines in the gas leaving the bed.
- Instead of, and/or in addition to, increasing the amount of fines elutriated from the bed, fines may be added directly to gas which has already left the bed.
- In addition to improving the low sulphur quality of the converted gas, the fines may help to reduce any tendency of deposits to build up on the surfaces of ducts and conduits through which they pass, thereby reducing the flow resistance of gas to downstream equipment.
- The invention is further described with reference to the accompanying drawing which is a flow diagram of the relevant principal parts of a fuel gasification plant embodying a non-limitative example of the invention.
- The sulphur-containing fuel (e.g. high sulphur, heavy fuel oil)- is passed from a storage station 11 via a suitable regulating
valve 12 into abed 13 of fluidizable particles comprising calcium oxide contained in agasifier vessel 14. Thebed 13 is supported on a suitableair distributor plate 15, and air is passed into thebed 13 via theplate 15 from afan 16 at a rate determined by the setting of anair valve 17. The air fluidizes the particles in thebed 13 and converts the fuel into combustible gas of low sulphur content at a temperature in the range 800°C to 1100°C, preferably 880 to 920°C (e.g. about 900°C), sulphur being fixed in particles of the bed as calcium sulfide and other nonvolatile solid of sulphur. - The combustible gas passes out of the
bed 13 via thetop surface 18 thereor into the freeboard space 19 in thevessel 14 above thebed 13 and elutriates a certain amount of fine solids from the bed, the amount depending, inter alia, on the nature of the bed particles and the superficial velocity of gas through the bed. The combustible gas and entrained solids is conducted from thevessel 14 togas utilization equipment 20 such as a burner associated with a heat recovery device (e.g. a boiler) via aconduit 21, acyclone separator 22 and aconduit 23. The gas after use inequipment 20 is discharged therefrom viaconduit 24. - The
cyclone separator 22 separates at least some entrained solids from the combustible gas, and the separated solids pass into adipleg 25 which communicates with areturn conduit 26 and astore conduit 27, which conduits have respective solidsflow regulating devices dipleg 25. - The return conduit 26 directs solids into the
bed 13 for re-use, and there may be suitable equipment (not shown) of any type known in the art for promoting the passage of solids throughconduit 26 into thebed 13. - The store conduit 27 directs solids into a
store 30 and the bottom of the latter is connected to a dumping valve 31 (normally closed) and also to a recycle valve 32 (normally open). When desirable or necessary, solids are caused to pass via therecycle valve 32 and arecycle conduit 33 to asolids storage hopper 34 which is constructed and arranged for passing solids into thevessel 14; e.g. into the freeboard space 19 via aconduit 35 and avalve 36. - The sulphur content of the combustible gas produced in
bed 13 is mesured in any convenient manner. For example, when the combustible thebed 13, e.g. by causing the addition of further particles comprising calcium oxide to thebed 13 up to the maximum design level of, or pressure drop through, thebed 13. Other actions may be caused to take place either alternatively or additionally up to limiting values, but the increase in sulphur-retaining bed material is referred to here as one typical but non-limitative action. - When one, some or all actions tending to reduce the level of sulphur as detected by
monitor 37 has or have been effected to its or their limiting value(s) and the sulphur level detected bymonitor 37 is still above a selected level, steps are initiated to increase the concentration of fine solids in the combustible gas and thereby reduce the amount of sulphur in the gas in accordance with the discovery on which the present invention is based. There are many ways in which the concentration of fine solids in the combustible gas can be increased as will be appreciated by those skilled in the art. For example, when an operating parameter such as the depth of thebed 13 or the superficial gas velocity invessel 14 attains a limiting value with an excessively high sulphur content in the combustible gas, thevalve 36 may be opened to admit fine solids intovessel 14 fromhopper 34. Alternatively, or additionally,valve 29 may be closed andvalve 28 opened so that solids recovered in thecyclone 22 are returned to thebed 13 viareturn conduit 26. The foregoing actions may be regulated directly and/or indirectly by the signals produced atmonitor 37 from asuitable controlier 40. - The addition of fine solids to the
bed 13 or freeboard space 19 may not necessarily produce the desired amount of entrained solids in the combustible gas, and suitable equipment for monitoring the entrained solids rate may be incorporated in the installation. We have observed that the temperature of thedipleg 25 or of solids therein bears a strong correlation to the amount of entrained solids. This observation is exploited in the illustrated embodiment wherein atemperature sensor 41 monitors the dipleg temperature and influences the opening and closing ofvalve 36 either alone or by modulating the signal passing tovalve 36 from the controller 4Q. The signal fromtemperature sensor 41 may also or alternatively be employed to regulate the opening and closing ofvalves - In order to avoid an excessive build-up of particles in the
bed 13, asolids dump valve 42 is provided for dumping particles from a zone ofbed 13 immediately above thedistributor 15. - Excess amounts of fines may be dumped by opening the
fines valve 31. - It is to be understood that the described embodiment has not been described exhaustively but only in relation to the invention, and that moreover, the parts shown in the drawing are not represented to a uniform size scale.
Claims (6)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB23639/77A GB1601364A (en) | 1977-06-03 | 1977-06-03 | Conversion of sulphur-containing fuels to sulphur-free gases |
GB2363977 | 1977-06-03 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0000238A1 true EP0000238A1 (en) | 1979-01-10 |
EP0000238B1 EP0000238B1 (en) | 1982-02-24 |
Family
ID=10198905
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP78300003A Expired EP0000238B1 (en) | 1977-06-03 | 1978-06-01 | A method of converting a sulphur-containing fuel to a substantially sulphur-free combustible gas |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0000238B1 (en) |
DE (1) | DE2861642D1 (en) |
GB (1) | GB1601364A (en) |
IT (1) | IT1156800B (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3969089A (en) * | 1971-11-12 | 1976-07-13 | Exxon Research And Engineering Company | Manufacture of combustible gases |
-
1977
- 1977-06-03 GB GB23639/77A patent/GB1601364A/en not_active Expired
-
1978
- 1978-06-01 DE DE7878300003T patent/DE2861642D1/en not_active Expired
- 1978-06-01 EP EP78300003A patent/EP0000238B1/en not_active Expired
- 1978-06-02 IT IT7849689A patent/IT1156800B/en active
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3969089A (en) * | 1971-11-12 | 1976-07-13 | Exxon Research And Engineering Company | Manufacture of combustible gases |
Also Published As
Publication number | Publication date |
---|---|
EP0000238B1 (en) | 1982-02-24 |
DE2861642D1 (en) | 1982-03-25 |
IT7849689A0 (en) | 1978-06-02 |
IT1156800B (en) | 1987-02-04 |
GB1601364A (en) | 1981-10-28 |
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