CN102690689A - Device and method for scrubbing and purifying coal gas - Google Patents
Device and method for scrubbing and purifying coal gas Download PDFInfo
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- CN102690689A CN102690689A CN2012101898893A CN201210189889A CN102690689A CN 102690689 A CN102690689 A CN 102690689A CN 2012101898893 A CN2012101898893 A CN 2012101898893A CN 201210189889 A CN201210189889 A CN 201210189889A CN 102690689 A CN102690689 A CN 102690689A
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Abstract
The invention discloses a device and a method for scrubbing and purifying coal gas. The device for scrubbing and purifying coal gas comprises a venturi scrubbing device, a scrubbing tower and a circulating water pump, wherein a de-dusting device is arranged in the scrubbing tower; the de-dusting device is arranged at a gas inlet of the scrubbing tower; the gas inlet of the scrubbing tower is communicated with a gas outlet of the venturi scrubbing device; and the circulating water pump is respectively communicated with a water inlet of the venturi scrubbing device and a water outlet of the scrubbing tower. The device for scrubbing and purifying coal gas provided by the invention is characterized in that on one hand, the de-dusting device is arranged in the scrubbing tower so that the occupied space of the whole device is reduced; on the other hand, the small grains, such as ash, carried by the coal gas, are wetted and aggregated in the venturi scrubbing device so as to form big grains, and then the big grains enter into the scrubbing tower so as to be separated, scrubbed and purified; compared with the scrubbing and de-dusting in the prior art, the device has the advantage that the de-dusting efficiency is greatly increased; and the circulating water pump is used and the water in the scrubbing tower is used as the venturi scrubbing water, so that the water consumption is reduced to a certain extent.
Description
Technical field
The present invention relates to technical field of coal chemical industry, in particular to a kind of coal gas washing purification apparatus and method.
Background technology
In recent years, the energy of China, Chemicals were in the rapid growth stage always, and Coal Chemical Industry has been occupied critical role at the energy, chemical field.Along with environmental problem becomes increasingly conspicuous, the clean and effective of coal transforms and more and more comes into one's own simultaneously.Gasification is the gordian technique of coal clean utilization as " tap " of coal chemical technology.The Coal Chemical Industry project presents quick growth at present, and Coal Gasification Technology has also obtained developing rapidly and using, and has vast market prospect.
The air-flow bed coal-gasification technology is that coal slurry or coal dust and gasifying medium are sprayed at a high speed in the vapourizing furnace through nozzle, forms high turbulence, has strengthened the mixing in the vapourizing furnace, helps fully carrying out of gasification reaction.High temperature, high pressure in the airflow bed gasification furnace, mixing preferably that characteristics have determined it to be convenient to improve throughput, meet large scale chemical plant single series, development trend of large-scale, is the mainstream technology that extensive gasification of present stage is produced.The entrained flow bed gasification technology of present domestic application mainly contains GE-Texaco, Shell, siemens GSP, northwest chemical industry institute polynary slurry, the opposed multi-nozzle of China's reason, two sections stoves of Xi'an thermal technology institute, two sections stoves of Tsing-Hua University, space flight stove etc.
In the air-flow bed coal-gasification technology, about 1300 ℃-1500 ℃ of the raw gas temperature of coming out from vaporizer need be with high temperature rough gas cooling dedusting, and existing technology can be divided into two kinds of pot destroying process and chilling process.Pot destroying process generally is made up of one or more levels waste heat boiler and dry method deashing device (like porcelain filter) etc.High temperature rough gas is through one or more levels waste heat boiler, and temperature is reduced to 300 ℃-400 ℃, through deashing device, obtains the lower raw gas of dustiness then.Chilling process generally is made up of with its inner member the shock chamber.High temperature rough gas gets into the shock chamber, feeds the heat that a large amount of chilled water absorb high temperature rough gas simultaneously, and the lime-ash of carrying secretly in the raw gas is solidified, and obtaining temperature is 200 ℃-300 ℃, the raw gas that dustiness is lower.
For satisfying the needs that coal hydrogen manufacturing, coal system methyl alcohol and synthetic ammonia etc. are produced, generally also need carry out washing, purifying again through the raw gas after the cooling dedusting, could get into the subsequent conversion system.The gas washing purification process of Coal Chemical Industry industry employing at present is that raw gas is introduced Venturi scrubber; Carry out wetting the solid particulates of carrying secretly in the raw gas such as lime-ash and reunion; Send into washing tower then and wash, perhaps adopt the two-stage Venturi, or washing tower is sent in the combination of Venturi and separator again; Raw gas after the washing gets into transformation system, and Heisui River then gets into the usage on black water system and handles and recycle.This coal gas washing purification apparatus and technology, long flow path, facility investment is big, and it is big to take up room, and washing effect is bad, and the easy dust stratification of washing tower stops up, easy to clean not, the turnaround is long, influences the steady running of full factory.
Summary of the invention
The present invention aims to provide a kind of coal gas washing purification apparatus and method, and the coal gas washing purification apparatus technical process is long in the prior art, technical problem big, the dust removing effects difference takes up room to solve.
To achieve these goals, according to an aspect of the present invention, a kind of coal gas washing purification apparatus is provided.This coal gas washing purification apparatus comprises: Venturi scrubber; Washing tower, set inside has cleaning apparatus, and cleaning apparatus is arranged on washing tower inlet mouth place; The washing tower inlet mouth is connected with the air outlet of Venturi scrubber.Water circulating pump is connected with the water-in and the washing tower water outlet of Venturi scrubber respectively.
Further, cleaning apparatus comprises one or one group of cyclonic separator.
Further, one group of cyclonic separator comprises 2 or 4 cyclonic separators that laterally arrange.
Further, one group of cyclonic separator comprises the above cyclonic separator of secondary, and the quantity of every grade of cyclonic separator is 1 ~ 8, and wherein, the inlet of next stage cyclonic separator is connected with the outlet of upper level cyclonic separator.
Further, one group of cyclonic separator comprises primary cyclone and secondary cyclone, and primary cyclone and secondary cyclone comprise 1 ~ 8 cyclonic separator that laterally arranges respectively.
Further, washing tower comprises: the container for storing liquid that sets gradually from bottom to top in washing tower shell and the washing tower shell, cleaning apparatus, spray water sparger, washing, purifying structure and scum dredger; And the top of washing tower shell is provided with the washing tower air outlet; The washing tower water outlet is arranged on the position, middle and upper part of container for storing liquid; Be provided with washing tower make up water inlet between washing, purifying structure and the scum dredger; And the bottom of washing tower is provided with wastewater outlet.
Further, water circulating pump further comprises the water outlet that communicates with the spray water sparger.
Further, the washing, purifying structure is column plate or filler.
Further, wastewater outlet is connected with Waste Water Treatment.
According to a further aspect of the invention, the method that provides a kind of gas washing to purify.This method adopts said apparatus to carry out the washing, purifying of coal gas.
Coal gas washing purification apparatus of the present invention comprises Venturi scrubber, washing tower and water circulating pump.On the one hand, because cleaning apparatus is arranged at washing tower inside, reduced taking up room of complete assembly; On the other hand, wetting in Venturi scrubber, the reunion of small-particles such as the lime-ash of carrying secretly in the coal gas becomes macrobead, and then gets into washing tower, carries out separating, washing and purifies, and compares with scrubbing dust collection of the prior art, has greatly improved efficiency of dust collection.And the use water circulating pump, the wash-down water of the water of washing tower, can reduce water consumption to a certain extent as Venturi.In the prior art,, a plurality of assisted dust-collecting devices are set before washing tower usually in order to improve the efficiency of dust collection of coal gas washing purification apparatus; For example; Two-stage Venturi scrubbing or the dedusting of two-stage separator are set, or Venturi connects with separator etc., cause whole process flow longer like this.Reach identical dust removing effects, coal gas washing purification apparatus of the present invention has compared with prior art greatly been simplified technical process.
Description of drawings
Figure of description is used to provide further understanding of the present invention, constitutes a part of the present invention, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, does not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 shows according to the schematic flow sheet of the gas washing purifying method of the embodiment of the invention and the structural representation of washing tower; And
One group of cyclonic separator that Fig. 2 shows according to the embodiment of the invention is installed in the plan structure synoptic diagram in the washing tower.
Embodiment
Need to prove that under the situation of not conflicting, embodiment and the characteristic among the embodiment among the present invention can make up each other.Below with reference to accompanying drawing and combine embodiment to specify the present invention.
The typical embodiment according to the present invention; As shown in Figure 1; Coal gas washing purification apparatus comprises Venturi scrubber 200, washing tower 300 and water circulating pump 100, and wherein, washing tower 300 set inside have cleaning apparatus 310; Cleaning apparatus 310 is arranged on washing tower inlet mouth 302 places, and washing tower inlet mouth 302 is connected with the air outlet of Venturi scrubber 200; Water circulating pump 100 is connected with the water-in and the washing tower water outlet 301 of Venturi scrubber 200 respectively.Adopt technical scheme of the present invention, on the one hand,, reduced taking up room of complete assembly because cleaning apparatus is arranged on washing tower inside; Again on the one hand, wetting in Venturi scrubber, the reunion of small-particles such as the lime-ash of carrying secretly in the coal gas becomes macrobead, and then gets into washing tower, carries out separating, washing and purifies, and compares with scrubbing dust collection of the prior art, has greatly improved efficiency of dust collection.And the use water circulating pump, the wash-down water of the water of washing tower, can reduce water consumption to a certain extent as Venturi.
The typical embodiment according to the present invention; As shown in Figure 1, washing tower 300 comprises container for storing liquid 311, cleaning apparatus 310, spray water sparger 303, washing, purifying structure and the scum dredger 306 that sets gradually in washing tower shell 304 and the washing tower shell 304 from bottom to top; And the top of washing tower shell 304 is provided with washing tower air outlet 305; Washing tower water outlet 301 is arranged on the position, middle and upper part of container for storing liquid 311; Be provided with washing tower make up water inlet 307 between washing, purifying structure and the scum dredger 306; And the bottom of washing tower 300 is provided with wastewater outlet 312.
The typical embodiment according to the present invention, water circulating pump 100 further comprises the water outlet that communicates with spray water sparger 303.
The typical embodiment according to the present invention, the washing, purifying structure can be column plate 308 or filler, wherein column plate 308 can adopt float-valve type column plate, sieve plate.Wastewater outlet 312 is connected with Waste Water Treatment.
The typical embodiment according to the present invention, the method that gas washing purifies adopts said apparatus to carry out the washing, purifying of coal gas.Specifically comprise the steps: raw gas is introduced Venturi scrubber 200, wetting in Venturi scrubber 200, the reunion of small-particles such as the lime-ash of carrying secretly in the raw gas becomes macrobead, and then gets into washing tower 300, carries out separating, washing and purifies.Washing tower 300 is a composite structure; Raw gas gets into washing tower 300, at first carries out the first class purification dedusting through being positioned at one group of built-in cyclonic separator of washing tower 300 bottoms, derives from cyclonic separator top discharge pipe then; Again through the 303 water spray washings of spray water sparger; Getting into column plate 308 (or filler) and the make up water counter current contact that washing tower make up water inlet 307 adds, carry out secondary washing and purify, pass through the scum dredger 306 at washing tower 300 tops at last; Remove steam and the solid particulate carried secretly in the raw gas, derive from washing tower 300 tops.Between column plate 308 (or filler) and scum dredger 306, be provided with make up water inlet 307.Through the reservoir 311 of the isolated grey solid impurity particle of cyclonic separator along tremie pipe entering bottom, waste water is drawn from washing tower 300 bottoms and is sent into Waste Water Treatment.In position, container for storing liquid 311 middle and upper part, be provided with washing tower water outlet 301, cleaner washing water are sent into water circulating pump 100 pressurization back branch two-way, the one tunnel sends into Venturi scrubber 200, and spray water sparger 303 is sent into as the spray water of washing tower 300 in another road.Advanced the clean raw gas of twice washing, purifying, its vapour content reaches capacity, and dustiness is lower than 1mg/m
3, meet the requirement of subsequent conversion system.
Compare with coal gas washing purification apparatus of the prior art, the present invention utilizes cyclonic separator to have that volume is little, efficient is high, advantage of simple structure, and it is built in the washing tower; Improved efficiency of dust collection; Shortened technical process, reduced investment, equipment occupation space is little; Maintenance and maintenance are convenient, and have practiced thrift water consumption to a certain extent.Through the cyclonic separator group is optimized configuration, the present invention can also adapt to the raw gas purifying requirement of different dustiness, and is especially obvious to the high raw gas purifying effect of dustiness.Through the clean coal gas that method provided by the present invention obtains, its vapour content reaches capacity, and dustiness is lower than 1mg/m
3, meet of the requirement of Coal Chemical Industry industry subsequent conversion system to synthetic gas.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a coal gas washing purification apparatus is characterized in that, comprising:
Venturi scrubber (200),
Washing tower (300), set inside have cleaning apparatus (310), and said cleaning apparatus (310) is arranged on washing tower inlet mouth (302) and locates; Said washing tower inlet mouth (302) is connected with the air outlet of said Venturi scrubber (200); Water circulating pump (100) is connected with the water-in and the washing tower water outlet (301) of said Venturi scrubber (200) respectively.
2. device according to claim 1 is characterized in that, said cleaning apparatus (310) comprises one or one group of cyclonic separator.
3. device according to claim 2 is characterized in that, said one group of cyclonic separator comprises 2 or 4 cyclonic separators that laterally arrange.
4. device according to claim 2; It is characterized in that said one group of cyclonic separator comprises the above cyclonic separator of secondary, the quantity of every grade of cyclonic separator is 1 ~ 8; Wherein, the inlet of next stage cyclonic separator communicates with the outlet of upper level cyclonic separator.
5. device according to claim 4; It is characterized in that; Said one group of cyclonic separator comprises primary cyclone and secondary cyclone, and said primary cyclone and said secondary cyclone comprise 1 ~ 8 cyclonic separator that laterally arranges respectively.
6. device according to claim 1; It is characterized in that said washing tower (300) comprising: the container for storing liquid (311) that sets gradually in washing tower shell (304) and the said washing tower shell (304), said cleaning apparatus (310), spray water sparger (303), washing, purifying structure and scum dredger (306) from bottom to top;
And the top of said washing tower shell (304) is provided with washing tower air outlet (305);
Said washing tower water outlet (301) is arranged on the position, middle and upper part of said container for storing liquid (311);
Be provided with washing tower make up water inlet (307) between said washing, purifying structure and the said scum dredger (306); And
The bottom of said washing tower (300) is provided with wastewater outlet (312).
7. device according to claim 6 is characterized in that, said water circulating pump (100) further comprises the water outlet that communicates with said spray water sparger (303).
8. device according to claim 6 is characterized in that, said washing, purifying structure is column plate (308) or filler.
9. device according to claim 6 is characterized in that, said wastewater outlet (312) is connected with Waste Water Treatment.
10. a gas washing purifying method is characterized in that, adopts the washing, purifying that carries out coal gas like each described device in the claim 1 to 9.
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| CN2012101898893A CN102690689B (en) | 2012-06-08 | 2012-06-08 | Device and method for scrubbing and purifying coal gas |
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| CN2012101898893A CN102690689B (en) | 2012-06-08 | 2012-06-08 | Device and method for scrubbing and purifying coal gas |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105176599A (en) * | 2015-09-29 | 2015-12-23 | 中国东方电气集团有限公司 | Impact flow washing device for purifying raw gas and purifying process |
| CN107019980A (en) * | 2017-05-25 | 2017-08-08 | 中盐安徽红四方股份有限公司 | Venturi scrubber, the washing system containing it and application |
| CN108102718A (en) * | 2018-01-02 | 2018-06-01 | 神华集团有限责任公司 | Dry pulverized coal gives up pan gas system and method |
| CN109385313A (en) * | 2017-08-07 | 2019-02-26 | 中国石油化工股份有限公司 | A kind of raw gas washing process |
| CN109628161A (en) * | 2019-02-18 | 2019-04-16 | 中国华能集团清洁能源技术研究院有限公司 | Cyclone and the scrubbing tower of stator blade group built in a kind of band |
| CN111575065A (en) * | 2020-06-10 | 2020-08-25 | 山西潞安煤基清洁能源有限责任公司 | Washing method for high-sulfur coal after high-temperature gasification |
| CN112961712A (en) * | 2021-02-08 | 2021-06-15 | 赛鼎工程有限公司 | System and method for preparing LNG (liquefied Natural gas) and hydrogen by deeply purifying coke oven gas |
| CN115193202A (en) * | 2022-09-19 | 2022-10-18 | 航天氢能沧州气体有限公司 | Energy-saving environment-friendly synthetic gas washing tower |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105176599A (en) * | 2015-09-29 | 2015-12-23 | 中国东方电气集团有限公司 | Impact flow washing device for purifying raw gas and purifying process |
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| CN108102718A (en) * | 2018-01-02 | 2018-06-01 | 神华集团有限责任公司 | Dry pulverized coal gives up pan gas system and method |
| CN109628161A (en) * | 2019-02-18 | 2019-04-16 | 中国华能集团清洁能源技术研究院有限公司 | Cyclone and the scrubbing tower of stator blade group built in a kind of band |
| CN109628161B (en) * | 2019-02-18 | 2023-11-03 | 中国华能集团清洁能源技术研究院有限公司 | Washing tower with built-in cyclone and air guide plate group |
| CN111575065A (en) * | 2020-06-10 | 2020-08-25 | 山西潞安煤基清洁能源有限责任公司 | Washing method for high-sulfur coal after high-temperature gasification |
| CN112961712A (en) * | 2021-02-08 | 2021-06-15 | 赛鼎工程有限公司 | System and method for preparing LNG (liquefied Natural gas) and hydrogen by deeply purifying coke oven gas |
| CN112961712B (en) * | 2021-02-08 | 2021-11-26 | 赛鼎工程有限公司 | System and method for preparing LNG (liquefied Natural gas) and hydrogen by deeply purifying coke oven gas |
| CN115193202A (en) * | 2022-09-19 | 2022-10-18 | 航天氢能沧州气体有限公司 | Energy-saving environment-friendly synthetic gas washing tower |
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