CN201952410U - Coal-gas purifying device - Google Patents
Coal-gas purifying device Download PDFInfo
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- CN201952410U CN201952410U CN 201020682539 CN201020682539U CN201952410U CN 201952410 U CN201952410 U CN 201952410U CN 201020682539 CN201020682539 CN 201020682539 CN 201020682539 U CN201020682539 U CN 201020682539U CN 201952410 U CN201952410 U CN 201952410U
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- scrubber
- gas
- cleaning device
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- coal
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
- Y02E20/18—Integrated gasification combined cycle [IGCC], e.g. combined with carbon capture and storage [CCS]
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Abstract
The utility model provides a coal-gas purifying device, which comprises a cyclone scrubber, a foam scrubber and a spray tower, wherein the cyclone scrubber is used for combining cyclone separation and spray scrubbing; a coal-gas outlet at the top of the cyclone scrubber is communicated with the bottom of the foam scrubber through a first pipeline; and a coal-gas outlet at the top of the foam scrubber is communicated with the bottom of the spray tower through a second pipeline. The coal-gas purifying device disclosed by the utility model has the characteristics of simple structure and large operating elasticity and is favorable to ensuring that equipment is convenient to maintain and stable to operate for a long period; the overall pressure drop is about 5kPa, and the energy consumption is greatly reduced; and the deep purification of coal gas is realized, and the ash content in the coal gas after being purified is ensured to be less than 1mg/m<3>.
Description
Technical field
The utility model relates to a kind of gas cleaning device, relates in particular to the refining plant of the super clean gas of a kind of entrained flow gasification production.
Background technology
Coal gasification, especially high pressure, large vol entrained flow bed gasification technology have shown good economic and social benefit, are representing development trend, are the coal utilization technology that cleans most now, are the leading and crucial of clean coal technology.The coal gas that gasification of coal generates can be used for the production of electric power, steam, automotive fuel, coal-based chemical (synthetic ammonia, methyl alcohol, alkene etc.), hydrogen etc., but the production of these products has proposed strict requirement to gas purification.With integrated gasification combined cycle for power generation (IGCC) is example, if the coal gas that goes out vapourizing furnace is without purifying the IGCC system that directly enters, work-ing life that contained thin ash and water smoke not only influence heat-transfer effect and equipment in the gas so, and can cause the wearing and tearing and the obstruction of pipeline, waste heat boiler and hot tube heat exchanger, simultaneously also severe contamination environment; Be example again with the synthesis of chemicals, building-up process all needs catalyzer, if the coal gas rough purification is not thorough, the thin ash, the water smoke that wherein contain very easily are attracted to catalyst surface, make catalyst activity reduction so that have a strong impact on production, thereby cause great financial loss.So the coal gas rough purification be necessary also be necessary, its target that will reach be in the coal gas dustiness less than 1mg/m
3
Entrained flow gasification is because of the purposes difference of coal gas, the difference of recovery of heat mode, make the rough purification of raw gas form diverse ways, representational have following several: dry method (high temperature) purification, wet purification, dry method and wet method combination, one of but Quench type gasifying process commonly used is all adopted wet purification method, and the key equipment in this method of Venturi scrubber Chang Zuowei.Practice shows, has used the coal gas rough purification system of Venturi scrubber, and the pressure-losses is higher, and fouling is easily stopped up by system, and coal gas is prone to and is with grey water phenomenon, has had a strong impact on the long-period stable operation of total system.The variation of property of raw material, vapor pressure and vapourizing furnace service temperature etc. can influence the processing property of rough purification system to a certain extent, thereby influences the gas purification effect.So,, press for the big coal gas rough purification method of a kind of less energy-consumption, good purification and turndown ratio from the needs of the reliable and stable operation of system's long period.
Summary of the invention
The purpose of this utility model is to provide the gas cleaning device of a kind of less energy-consumption, high purification efficiency, and being used for the solid carbon-contg hydrogen compound is the rough purification that coal gas is produced in the gasification of unstripped gas fluidized bed, to realize the long-period stable operation of system.
For achieving the above object, the utility model provides gas cleaning device as described below:
A kind of gas cleaning device comprises:
The cyclone scrubber that cyclonic separation is combined with spray washing;
The foam scrubber that the gas exit that makes described cyclone scrubber top by first pipeline is connected with its bottom;
The spray column that the gas exit that makes described foam scrubber top by second pipeline is connected with its bottom.
Preferably, described cyclone scrubber is made up of cyclonic separator, shower and reservoir.Described shower be arranged on cyclonic separator inner by under the axis on, described shower enters the mouth and is connected with circulating pipe.
Preferably, described foam scrubber is a tray column, is made up of eddy flow plate, first section column plate, second section column plate, the 3rd section column plate and reservoir from top to bottom.First section column plate top water-in is connected with outer water-supply pipe, and second section column plate top water-in links to each other with circulating water pipework, and the 3rd section column plate top water-in then is connected with grey water pipeline.First section column plate is set to 2～4 layers usually, and second section column plate is set to 1～3 layer, and the 3rd section column plate is set to 1～2 layer, and the gas entry pipeline inserts in the reservoir fluid-tight.
Preferably, described tray column is Gu Fata.
Preferably, described spray column is made up of eddy flow plate scum dredger, spraying layer and reservoir from top to bottom.The spraying layer water-in communicates with outer water-supply pipe, and spraying layer is set to 1～3 layer.
Described outer water supply can be one or more in boiler feed water, de-oxygenised water, the conversion phlegma.
Gas cleaning device of the present utility model compared with prior art, advantage is:
(1) cyclone scrubber, foam scrubber and spray column all have characteristics simple in structure, that turndown ratio is big, to guaranteeing that maintenance of equipment is convenient, it is favourable to stablize long-term operation;
(2) because the rough purification device that the utility model proposes comprised three equipment---the pressure drop of cyclone scrubber, foam scrubber and spray column is all lower, the about 5kPa of total pressure drop compares with existing rough purification device, energy consumption reduces greatly;
(3) because adopted the mode of whirlwind-spraying, bubbling contact and spraying contact stage purification, realize the deep purifying of coal gas, guaranteed to purify ash content＜1mg/m in the coal gas of back
3
Description of drawings
Fig. 1 is a gas cleaning device synoptic diagram of the present utility model.
Embodiment
Below in conjunction with Fig. 1 gas cleaning device of the present utility model is described in further detail.
Gas cleaning device of the present utility model comprises:
The cyclone scrubber 1 that cyclonic separation is combined with spray washing, its effect are further wetting coal gas, and particle is grown up in the acceleration coal gas, realize most of cindery removing.The coal gas that carries lime-ash and drop enters cyclone scrubber 1 along tangent line, recirculated water 104 enters shower 101 from entering the mouth, under the further effect of the wetting and centrifugal force of spray water, most of lime-ash and liquid is 102 outflows along the cyclone scrubber wall from downtake, enter reservoir 103, and the slag inclusion buck is discharged from reservoir 103 bottoms, be sent to the pulp water treatment system, coal gas is discharged through first pipeline 2, and reservoir 103 is provided with liquid level and takes into account liquid level alarm device, so that liquid level is controlled and reported to the police;
The foam scrubber 3 that the gas exit that makes cyclone scrubber 1 top by first pipeline 2 is connected with its bottom, its effect is the lime-ash that removes to greatest extent from the coal gas that cyclone scrubber 1 is sent.Foam scrubber 3 described in the utility model is a conventional tray column, is divided into five sections, is made up of eddy flow plate 301, first section column plate 303, second section column plate 305, the 3rd section column plate 307 and reservoir 308 from top to bottom.First section column plate is provided with the outer inlet 302 that supplies water, second section column plate is provided with recirculated water inlet 304, the 3rd section column plate is provided with grey water inlet 306, the inlet gas line inserts in reservoir 308 fluid-tights, the slag inclusion buck is discharged from reservoir 308 bottoms, be sent to the pulp water treatment system, coal gas is discharged through second pipeline 4.Reservoir 308 is provided with liquid level and takes into account liquid level alarm device, so that liquid level is controlled and reported to the police;
The spray column 5 that the gas exit that makes foam scrubber 3 tops by second pipeline 4 is connected with its bottom, its effect is the residual ash slag of further deep removal from the coal gas that foam scrubber 3 is sent.Three sections of described spray columns 5 minutes, form by eddy flow plate scum dredger 501, spraying layer 502 and reservoir 503 from top to bottom, spraying layer 502 water-ins communicate with outer water-supply pipe, reservoir 503 outlet at bottoms are connected with water pump 6, be connected with the recirculated water inlet 104 of cyclone scrubber 1 and the recirculated water inlet 304 of foam scrubber 3 respectively through pipeline 7 and 8 then, super clean gas after the washing is discharged by spray column 5 tops, the fed downstream operation.Reservoir 503 is provided with liquid level and takes into account liquid level alarm device, so that liquid level is controlled and reported to the police.
Embodiment 1
Day is handled the powdered coal pressuring gasified device of Quench type of 1000 tons of coals, and vapor pressure is 4.0MPa, and gasification temperature is 1550 ℃, and gasification gas goes out vaporizer after washing, and temperature is 221 ℃, and the butt flow is 73000Nm
3/ h, wet basis flow are 187500Nm
3/ h, cinder content is 7g/Nm in the dry gas
3The gas pressure that advances cyclone scrubber is 3.98MPa, and the temperature of circulation buck is 190 ℃, and the water yield is 30t/h.Coal gas mixes with buck, vapor condensation in a small amount of wet gas.Coal gas enters from cyclone scrubber 1 inlet, at spray water under the wetting and centrifugal action, 95% slag inclusion buck enters bottom reservoir 103 along the inner-wall surface of cyclone scrubber 3 through downtake 102, pulp water enters the pulp water treatment system from the discharging of reservoir 103 bottoms, remove most of cindery wet gas and enter foam scrubber 3 by first pipeline 2, source line inserts under reservoir 308 fluid-tights, pulp water enters the pulp water treatment system from the discharging of reservoir 308 bottoms, liquid layer contacts further purification back step by step and enters spray column 5 by second pipeline 4 on wet gas and the column plate, supply outside under the spray washing of high temperature shift phlegma, coal gas is realized deep purifying, discharge lower procedure from spray column 5 top exits, the lower concentration pulp water is then discharged the second section column plate that enters foam scrubber through recycle pump 6 from reservoir 503 bottoms.
The internal diameter of cyclone scrubber 1 is 2000mm, highly is 11000mm.Foam scrubber 3 internal diameters are 3200mm, highly are 15000mm, establish two-layer column plate for first section, establish two-layer column plate for second section, establish one deck column plate for the 3rd section.Spray column 5 internal diameters are 1200mm, are 40t/h for high temperature shift phlegma flow outward, and quantity of circulating water is 80t/h, and the grey water yield is 50t/h, go out that to contain lime-ash in the coal gas of spray column 5 be 0.8mg/m
3, the pressure drop of rough purification system is 5000kPa, not stifled slag is not with water, can the fine requirement of satisfying lower procedure.
Claims (9)
1. gas cleaning device comprises:
The cyclone scrubber that cyclonic separation is combined with spray washing;
The foam scrubber that the gas exit that makes described cyclone scrubber top by first pipeline is connected with its bottom;
The spray column that the gas exit that makes described foam scrubber top by second pipeline is connected with its bottom.
2. gas cleaning device according to claim 1 is characterized in that described cyclone scrubber is made up of cyclonic separator, shower and reservoir.
3. gas cleaning device according to claim 2 is characterized in that, described foam scrubber is a tray column, is made up of eddy flow plate, first section column plate, second section column plate, the 3rd section column plate and reservoir from top to bottom.
4. gas cleaning device according to claim 3 is characterized in that, described spray column is made up of eddy flow plate scum dredger, spraying layer and reservoir from top to bottom.
5. gas cleaning device according to claim 4 is characterized in that, the shower in the described cyclone scrubber be arranged on cyclonic separator inner by under the axis on, described shower enters the mouth and is connected with circulating pipe.
6. gas cleaning device according to claim 5, it is characterized in that, first section column plate top water-in in the described foam scrubber is connected with outer water-supply pipe, described second section column plate top water-in links to each other with circulating water pipework, described the 3rd section column plate top water-in then is connected with grey water pipeline, and the gas entry pipeline inserts in the reservoir fluid-tight.
7. gas cleaning device according to claim 6 is characterized in that, described tray column is Gu Fata.
8. gas cleaning device according to claim 7 is characterized in that, first section column plate in the described foam scrubber is set to 2～4 layers, and described second section column plate is set to 1～3 layer, and described the 3rd section column plate is set to 1～2 layer.
9. gas cleaning device according to claim 8 is characterized in that, described spraying layer water-in communicates with outer water-supply pipe, and spraying layer is set to 1～3 layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020682539 CN201952410U (en) | 2010-12-16 | 2010-12-16 | Coal-gas purifying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020682539 CN201952410U (en) | 2010-12-16 | 2010-12-16 | Coal-gas purifying device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201952410U true CN201952410U (en) | 2011-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020682539 Expired - Lifetime CN201952410U (en) | 2010-12-16 | 2010-12-16 | Coal-gas purifying device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102031158A (en) * | 2010-12-16 | 2011-04-27 | 神华集团有限责任公司 | Coal gas purifying device |
-
2010
- 2010-12-16 CN CN 201020682539 patent/CN201952410U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102031158A (en) * | 2010-12-16 | 2011-04-27 | 神华集团有限责任公司 | Coal gas purifying device |
| CN102031158B (en) * | 2010-12-16 | 2014-04-30 | 神华集团有限责任公司 | Coal gas purifying device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110831 Effective date of abandoning: 20140430 |
|
| AV01 | Patent right actively abandoned |