CN101468289B - Desulfurizer suitable for sulfuric dioxide of large-scope change and control method thereof - Google Patents
Desulfurizer suitable for sulfuric dioxide of large-scope change and control method thereof Download PDFInfo
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- CN101468289B CN101468289B CN2007103040693A CN200710304069A CN101468289B CN 101468289 B CN101468289 B CN 101468289B CN 2007103040693 A CN2007103040693 A CN 2007103040693A CN 200710304069 A CN200710304069 A CN 200710304069A CN 101468289 B CN101468289 B CN 101468289B
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Abstract
The invention discloses a desulphurization unit adapting to the concentration change of sulfur dioxide and a control method thereof, and in particular relates to a wet method flue gas desulphurization technique for a fuel electric plant in the technical field of environmental protection. The desulphurization unit comprises an absorption tower and an accident slurry tank. The upper end of the absorption tower is provided with a densitometer and a pH value meter, the lower end of the absorption tower is provided with a gypsum slurry discharging pump. The upper end of the accident slurry tank is provided with a fluid level meter. The desulphurization unit has the structural characteristics that a bottom slurry tank of the absorption tower is communicated with the upper end of the accident slurry tank through the slurry discharging pump, and the bottom of the accident slurry tank is communicated with the upper end of the absorption tank through a slurry returning pump. Compared with the prior art, the desulphurization unit and the method are applicable to the requirements on coal property coals with different sulfur contents, and have the characteristics of small investment, simple and practical transformation, and convenient and stable running, and are particularly applicable to the transformation of the already built desulphurization system of an electric power plant.
Description
Technical field
The present invention relates to the thermal power plant wet process of FGD technology of environmental technology field, particularly adapt to the desulfurizer and the control method thereof of sulfur dioxide concentration wide variation.
Background technology
In recent years, along with the raising gradually of environmental requirement, in order to reduce the discharge capacity of SO2 in the power-plant flue gas, many power plant have increased flue gas desulfur device.Kind surplus existing flue gas desulfurization technique has ten, wherein, wet method lime stone flue gas desulfurization technique (Wet-FGD) is most widely used at present, the most effective a kind of flue gas desulfurization technique.In wet method lime stone flue gas desulfurization technique, the lime stone slurry that has absorbed sulfur dioxide is converted into gypsum by oxidation reaction in the stock tank of absorption tower, through certain crystallization time crystalline particle is grown up again, by becoming gypsum after the dehydration of vacuum belt filter.But the fire coal that power plant uses be difficult to guarantee constant sulfur content, and using sulfur content, to be higher than the sulphur coal of desulphurization system design load unavoidable.So, cause the time of staying of desulfurization slurry in the stock tank of absorption tower not enough, be difficult to generate satisfactory desulfurated plaster.Prior art solutions is to transform the absorption tower, increase absorption tower stock tank volume or set up the outer stock tank of tower, but required improvement expenses is very high.In addition and since desulphurization system in the accident serum pot when desulphurization system is normally moved, emergency storage tank is vacant, causes the idleness of equipment again.
Summary of the invention
In order to solve above-mentioned problems of the prior art, the purpose of this invention is to provide a kind of desulfurizer and control method thereof that sulfur dioxide concentration changes that adapt to.It is that the accident serum pot is transformed into the outer stock tank of a tower, to be applicable to the needs of different sulfur content ature of coal coals.Have small investment, save the space, easy to use, stable characteristics.
In order to reach the foregoing invention purpose, technical scheme of the present invention realizes as follows:
A kind of desulfurizer that adapts to the sulfur dioxide concentration variation, it comprises absorption tower and accident serum pot.The upper end on absorption tower is equipped with densitometer measuring device and pH value meter, and the lower end on absorption tower is equipped with plaster slurry pump.Accident serum pot upper end is equipped with the liquid level gauge measuring device.Its design feature is, bottom, described absorption tower stock tank is communicated with accident serum pot upper end by the slurries excavationg pump, is communicated with on returning pump and absorption tower by slurries bottom the accident serum pot.
Realize the control method of the desulfurizer that above-mentioned adaptation sulfur dioxide concentration changes, its key step is:
1. by control module sulfur dioxide concentration, desulfuration efficiency, liquid-gas ratio, calcium sulfur ratio, pH value, the density signal of desulphurization system are analyzed, calculated required stock tank volume.
2. when required stock tank volume during, close the slurries excavationg pump less than absorption tower stock tank volume.Make accident serum pot liquid level reach minimum, close slurries and return pump.
3. when required stock tank volume during, open the slurries excavationg pump greater than absorption tower stock tank volume.The actual liquid level that makes the accident serum pot with set up liquid level identical.Open slurries and return pump, slurries are circulated in absorption tower stock tank and accident serum pot repeatedly.
The present invention is transformed into the outer stock tank of a tower owing to adopted technique scheme with the accident serum pot in the desulphurization system.When desulphurization system was normally moved, the accident serum pot used as the outer stock tank of tower, to increase the volume of absorption tower stock tank.When desulphurization system was stopped transport, the accident serum pot still as the holding vessel that absorbs slurries, was brought into play its original function.Thereby guarantee desulphurization system stable operation under the operating mode that is higher than desulphurization system sulfur dioxide design load.Compare with prior art, the present invention is applicable to the needs of different sulfur content ature of coal coals, and it is little to have an investment, transforms simple and practically, and operation makes things convenient for stable characteristics.Be specially adapted to power plant and built the transformation of desulphurization system.
The present invention will be further described below in conjunction with the drawings and specific embodiments.
Description of drawings
Fig. 1 is apparatus of the present invention structural representation;
Fig. 2 is a control flow chart of the present invention.
The specific embodiment
Referring to Fig. 1, desulfurizer of the present invention comprises absorption tower 1 and accident serum pot 2.The upper end on absorption tower 1 is equipped with densitometer measuring device 6 and pH value meter 7, and the lower end on absorption tower 1 is equipped with plaster slurry pump 8.Accident serum pot 2 upper ends are equipped with liquid level gauge measuring device 9.Absorption tower 1 bottom stock tank is communicated with accident serum pot 2 upper ends by slurries excavationg pump 3, and accident serum pot 2 bottoms are returned pump 4 by slurries and are communicated with 1 upper end, absorption tower.
Referring to Fig. 2, the control method step of apparatus of the present invention is:
1. by control module sulfur dioxide concentration, desulfuration efficiency, liquid-gas ratio, calcium sulfur ratio, pH value, the density signal of desulphurization system are analyzed, calculated required stock tank volume.
2. when required stock tank volume during, close slurries excavationg pump 3 less than absorption tower 1 stock tank volume.Make accident serum pot 2 liquid levels reach minimum, close slurries and return pump 4.
3. when required stock tank volume during, open slurries excavationg pump 3 greater than absorption tower 1 stock tank volume.With the lime stone slurry input accident serum pot 2 in 1 stock tank of absorption tower, the actual liquid level that makes accident serum pot 2 with set up liquid level identical.Open slurries and return pump 4, lime stone slurry is circulated in absorption tower 1 stock tank and accident serum pot 2 repeatedly.Strengthen the volume of absorption tower 1 stock tank actually, thereby prolonged the time of staying of lime stone slurry, helped the dissolving of desulphurization reaction, crystallization reaction and lime stone.
Claims (2)
1. one kind adapts to the desulfurizer that sulfur dioxide concentration changes, it comprises absorption tower (1) and accident serum pot (2), the upper end on absorption tower (1) is equipped with densitometer measuring device (6) and pH value meter (7), the lower end on absorption tower (1) is equipped with plaster slurry pump (8), accident serum pot (2) upper end is equipped with liquid level gauge measuring device (9), it is characterized in that, bottom, described absorption tower (1) stock tank is communicated with accident serum pot (2) upper end by slurries excavationg pump (3), and accident serum pot (2) bottom is returned pump (4) by slurries and is communicated with absorption tower (1) upper end.
2. realization adapts to the control method of the desulfurizer of sulfur dioxide concentration variation according to claim 1, and its key step is:
1. by control module sulfur dioxide concentration, desulfuration efficiency, liquid-gas ratio, calcium sulfur ratio, pH value, the density signal of desulphurization system are analyzed, calculated required stock tank volume;
2. when required stock tank volume during, close slurries excavationg pump (3), make accident serum pot (2) liquid level reach minimum, close slurries and return pump (4) less than absorption tower (1) stock tank volume;
3. when required stock tank volume during greater than absorption tower (1) stock tank volume, open slurries excavationg pumps (3), the actual liquid level that makes accident serum pot (2) with set up liquid level identical, open slurries and return pump (4), slurries are circulated in absorption tower (1) stock tank and accident serum pot (2) repeatedly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007103040693A CN101468289B (en) | 2007-12-24 | 2007-12-24 | Desulfurizer suitable for sulfuric dioxide of large-scope change and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007103040693A CN101468289B (en) | 2007-12-24 | 2007-12-24 | Desulfurizer suitable for sulfuric dioxide of large-scope change and control method thereof |
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| CN101468289A CN101468289A (en) | 2009-07-01 |
| CN101468289B true CN101468289B (en) | 2011-05-04 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101912723B (en) * | 2010-07-30 | 2012-04-25 | 金川集团有限公司 | Method for processing sulfur dioxide smelting fumes |
| CN102974201B (en) * | 2011-08-08 | 2014-07-02 | 同方环境股份有限公司 | Double pH adjustment flue gas desulphurization system and control method thereof |
| CN104226101A (en) * | 2014-09-10 | 2014-12-24 | 鞍钢集团工程技术有限公司 | Slurry circulation process based on SDA process desulfurization system |
| CN105363338A (en) * | 2015-12-07 | 2016-03-02 | 浙江大学 | Analytical method of desulfurization efficiency influence factors in flue gas desulphurization system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6138378A (en) * | 1997-11-11 | 2000-10-31 | Mitsubishi Heavy Industries, Ltd. | Wet gas processing method and the apparatus using the same |
| CN2820301Y (en) * | 2005-10-11 | 2006-09-27 | 施耀 | Device for regenerating smoke desulfurizing liquid by double alkali method |
| CN201135853Y (en) * | 2007-12-24 | 2008-10-22 | 同方环境股份有限公司 | Desulfurizing device suitable for sulfurous anhydride varying at large scope |
-
2007
- 2007-12-24 CN CN2007103040693A patent/CN101468289B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6138378A (en) * | 1997-11-11 | 2000-10-31 | Mitsubishi Heavy Industries, Ltd. | Wet gas processing method and the apparatus using the same |
| CN2820301Y (en) * | 2005-10-11 | 2006-09-27 | 施耀 | Device for regenerating smoke desulfurizing liquid by double alkali method |
| CN201135853Y (en) * | 2007-12-24 | 2008-10-22 | 同方环境股份有限公司 | Desulfurizing device suitable for sulfurous anhydride varying at large scope |
Non-Patent Citations (1)
| Title |
|---|
| 张向群等.石灰石―石膏湿法烟气脱硫工艺在汕头电厂的应用.《东北电力技术》.2007,(第12期), * |
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