CN102827640A - Partially-chilled dry coal powder or coal water slurry gasification system and gasification process - Google Patents
Partially-chilled dry coal powder or coal water slurry gasification system and gasification process Download PDFInfo
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- CN102827640A CN102827640A CN201210368423XA CN201210368423A CN102827640A CN 102827640 A CN102827640 A CN 102827640A CN 201210368423X A CN201210368423X A CN 201210368423XA CN 201210368423 A CN201210368423 A CN 201210368423A CN 102827640 A CN102827640 A CN 102827640A
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- 239000003245 coal Substances 0.000 title claims abstract description 76
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 62
- 238000002309 gasification Methods 0.000 title claims abstract description 42
- 239000000843 powder Substances 0.000 title claims abstract description 42
- 239000002002 slurry Substances 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000005406 washing Methods 0.000 claims abstract description 43
- 239000010797 grey water Substances 0.000 claims abstract description 20
- 238000011084 recovery Methods 0.000 claims abstract description 20
- 239000000428 dust Substances 0.000 claims abstract description 12
- 239000002351 wastewater Substances 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 86
- 239000002893 slag Substances 0.000 claims description 49
- 238000004140 cleaning Methods 0.000 claims description 24
- 238000010791 quenching Methods 0.000 claims description 17
- 238000001816 cooling Methods 0.000 claims description 13
- 230000000171 quenching effect Effects 0.000 claims description 8
- 239000002817 coal dust Substances 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 6
- 238000003786 synthesis reaction Methods 0.000 claims description 6
- 238000013022 venting Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 5
- 239000002918 waste heat Substances 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- 229910052573 porcelain Inorganic materials 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 3
- 239000013589 supplement Substances 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 description 4
- 239000003034 coal gas Substances 0.000 description 2
- 239000003250 coal slurry Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003020 moisturizing effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000036284 oxygen consumption Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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Abstract
The invention discloses a partially-chilled dry coal powder or coal water slurry gasification system. The partially-chilled dry coal powder or coal water slurry gasification system is characterized by comprising a gasifier, a heat recovery apparatus, a dust removal device, a washing component and a grey water treating unit which are sequentially connected through pipelines, wherein the gasifier comprises a hearth, a chilling apparatus coaxially arranged at the top part of the hearth and a synthetic gas delivery part connected with the output end of the chilling apparatus; the hearth is provided with at least one nozzle; the synthetic gas delivery part is provided with an exhaust port; the heat recovery apparatus is connected with the exhaust port of the synthetic gas delivery part, and the output end of the heat recovery apparatus is connected with the input end of the dust removal device; the washing component comprises a washing tower; the output end of the dust removal device is connected with the input end of the washing tower through a pipeline; an output port of the washing tower is used for outputting crude synthetic gas, and an outlet at the bottom of the washing tower is connected with an inlet of the grey water treating unit through a pipeline; and the grey water treating unit is used for outputting waste water. The invention also discloses a gasification method. The invention has the advantages of improved gasification efficiency and high energy utilization rate.
Description
Technical field
The present invention relates to a kind of partial-chilled dry coal powder or coal water slurry gasification system and gasifying process thereof.
Background technology
Existing coal slurry gasifier, the Quench type of cooling of its high-temperature synthesis gas generally all adopts descending complete chilling process, and its technology is simple relatively, ripe; Structure is also comparatively simple, and cost is lower, and is more suitable to some chemical-process; But the shortcoming of this kind technology is, cold gas efficiency is lower, and oxygen-consumption is big; Follow-up " Heisui River " intractability is big, influences long-term operation.
Existing dry powder vapourizing furnace, principal feature is the dry powder charging, the water wall liner adopts cooled coal gas to melt down the Quench heating gas, but that it melts down Quench is bigger with the gas compressor power consumption, and fluctuation of service is unfavorable for the long-term operation of equipment.
Summary of the invention
The present invention is a kind of partial-chilled dry coal powder or coal water slurry gasification system and the gasifying process thereof that provides for the above-mentioned shortcoming that overcomes the prior art existence; The present invention can improve the dry powder or the coal slurry gasifier of existing chilling process; Improve gasification efficiency; Improve cindery processing mode, effectively improve the cycle of operation.
The technical scheme that the present invention takes is: a kind of partial-chilled dry coal powder or coal water slurry gasification system, be characterized in, and comprise the vapourizing furnace, heat recovery equipment, cleaning apparatus, washing components and the grey water handing unit that are linked in sequence through pipeline;
Described vapourizing furnace comprises burner hearth, the coaxial chilling facility of said roof of the furnace, the synthetic gas delivery section that is connected with the output terminal of chilling facility of being arranged on; Described burner hearth is provided with at least one nozzle; Described synthetic gas delivery section is provided with venting port;
The input terminus of described heat recovery equipment is connected with the venting port of described synthetic gas delivery section through pipeline; Its output terminal is connected with described cleaning apparatus input terminus through pipeline;
Described washing components comprises a washing tower; The output terminal of described cleaning apparatus is connected with the input terminus of described washing tower through pipeline;
The delivery port output crude synthesis gas of described washing tower, its outlet at bottom is connected with the unitary inlet of described grey water handing through pipeline; Described grey water handing unit output waste water.
Above-mentioned a kind of partial-chilled dry coal powder or coal water slurry gasification system; Wherein, Described washing components also comprises a Venturi scrubber; Be arranged on the input terminus of described washing tower, an output terminal of said washing tower is connected with the circulation input terminus of said Venturi scrubber through circulating line, forms circulation cleaning; The output terminal of described cleaning apparatus is connected with the input terminus of described Venturi scrubber through pipeline.
Above-mentioned a kind of partial-chilled dry coal powder or coal water slurry gasification system wherein, also comprise a slag bath, are arranged on the below of the burner hearth of described vapourizing furnace; Described slag bath top is provided with sprinkler head, and its bottom is provided with slag-drip opening.
Above-mentioned a kind of partial-chilled dry coal powder or coal water slurry gasification system wherein, comprise that also a lock slag ladle and drags for slag bath, and the inlet of described lock slag ladle is connected with described slag-drip opening through pipeline, and its outlet is connected with the described slag bath that drags for through pipeline.
Above-mentioned a kind of partial-chilled dry coal powder or coal water slurry gasification system, wherein, described grey water handing unit also comprises a water supplement port.
Above-mentioned a kind of partial-chilled dry coal powder or coal water slurry gasification system, wherein, the burner hearth of said vapourizing furnace is provided with 4～6 nozzles, symmetric arrangement.
Above-mentioned a kind of partial-chilled dry coal powder or coal water slurry gasification system, wherein, said vapourizing furnace upper furnace and bottom are pyramidal structure, the centre is straight tube wall surface.
A kind of partial-chilled dry coal powder or the gasifying process of coal water slurry gasification system are characterized in, may further comprise the steps:
The step of a, generation synthetic gas:
With dry coal powder or coal water slurry with oxygenant is sent into the burner hearth of vapourizing furnace, vigorous reaction produces HTHP in stove synthetic gas; The temperature of said synthetic gas is about 1100～1700 ℃;
B, the ash of catching in the coal dust are discharged to quenching in the slag bath, then with the pulp water separation steps:
Ash in the coal dust mainly leans on inertia effect by under the seizure of vapourizing furnace upper furnace pyramidal structure with the form of melting slag in hot environment; Straight again tube wall surface trickling is pooled to the slag flow port of burner hearth bottom; Be discharged to the slag bath quenching that is arranged in the burner hearth below; Get into through the lock slag ladle then and drag for slag bath, pulp water is separated;
C, the synthetic gas that produces is carried out partial-chilled step:
Remaining flying dust is synthesized gas and carries secretly from the upper furnace discharge, carries out partial-chilled through chilling facility to the HTHP synthetic gas of discharging from roof of the furnace; Temperature after the said Quench is reduced to 700～1000 ℃;
D, the step that the synthetic gas after partial-chilled is carried out waste heat recovery and cools:
Synthetic gas after partial-chilled passes through the synthetic gas transport pipe, gets into the synthetic gas exhaust heat recovery apparatus, after cooling, cools to 250～400 ℃ step;
E, to synthetic gas ash disposal, washing after the cooling, the refrigerative step of lowering the temperature once more:
Synthetic gas after the cooling gets into cleaning apparatus remove most of dry ash after, get into Venturi scrubber, get into washing tower then, remove most of ash remaining in the synthetic gas and lower the temperature and be cooled to 60～200 ℃;
F, obtain qualified synthetic gas.
The above-mentioned a kind of partial-chilled dry coal powder or the gasifying process of coal water slurry gasification system wherein, comprise that also the buck that washing tower is discharged gets into the step that the grey water handing unit carries out water treatment.
The above-mentioned a kind of partial-chilled dry coal powder or the gasifying process of coal water slurry gasification system, wherein, described cleaning apparatus is cyclonic separator or porcelain filter.
The present invention is owing to adopted above technical scheme, and the technique effect of its generation is tangible:
1, the present invention adopts the partial-chilled high-temperature synthesis gas of discharging from vapourizing furnace burner hearth top of water/vapour; And further reduce the temperature of synthetic gas through exhaust heat recovery apparatus; Synthetic gas after the cooling gets into dust removal installation and removes most dry ash; Thereby reduce the load of follow-up treating plant, the synthetic gas of rough purification gets into further purification of water washing system and obtains qualified synthetic gas, and method is easy, reliable, effective;
2, the present invention adopts that to contain grey synthetic gas up; Lime-ash is descending, and the method for lime-ash separating treatment is with respect to complete water Quench mode (synthetic gas and lime-ash simultaneously descending); Catch the slag that carries in the synthetic gas as far as possible; Reduce the flying dust amount of carrying in the synthetic gas, get into waste heat recovery unit then and carry out heat recuperation, have the advantage that improves gasification efficiency and energy utilization rate;
3, gasifying furnace nozzle quantity of the present invention is 4～6 symmetric arrangement, effectively raises single furnace output, and can make that synthetic gas can produce eddy flow in the burner hearth, and it is long to have a residence time, sufficient reacting, and load is the advantage of adjusting easily;
4, return the dry coal powder mode of cooled coal gas Quench with respect to compression, omitted the Quench compressor, reduce the wasted work of system;
5, the ash and the slag that produce gasification carry out effective separating treatment, have solved lime-ash and have mixed a reluctant difficult problem, can effectively utilize dry ash and the isolating marketable value of slag simultaneously, help recycle;
6, dry powder or coal water slurry are gasified, water/vapour carries out the high temperature dust synthetic gas after the partial-chilled gasification, gets into dedusting afterwards and washes equipment and the technology that device reaches cooling ash disposal purpose.
Description of drawings
Fig. 1 is a kind of partial-chilled dry coal powder of the present invention or the one-piece construction synoptic diagram (sectional view) of coal water slurry gasification system.
Fig. 2 is a kind of partial-chilled dry coal powder of the present invention or the gasifying process schema of coal water slurry gasification system.
Embodiment
In order to understand this programme better, below through concrete case study on implementation and combine accompanying drawing at length to explain:
See also Fig. 1, a kind of partial-chilled dry coal powder of the present invention or coal water slurry gasification system comprise the vapourizing furnace 1, heat recovery equipment 2, cleaning apparatus 3, washing components 4 and the grey water handing unit 5 that are linked in sequence through pipeline.
Described vapourizing furnace 1 comprises burner hearth 11, the coaxial chilling facility 12 of said roof of the furnace, the synthetic gas delivery section 13 that is connected with the output terminal of chilling facility of being arranged on; The upper and lower of described burner hearth is a pyramidal structure, and the centre is straight tube wall surface.This burner hearth is provided with at least one nozzle 111, and the burner hearth of the said vapourizing furnace of present embodiment is provided with 4～6 nozzles, symmetric arrangement.Described synthetic gas delivery section is provided with venting port 121.
The input terminus of described heat recovery equipment 2 is connected with the venting port of described synthetic gas delivery section 13 through pipeline; Its output terminal is connected with the input terminus of described cleaning apparatus 3 through pipeline; This heat recovery equipment also comprises a water coolant input aperture 21 and a steam outlet 22.The bottom of cleaning apparatus 3 is provided with dry ash delivery port 31.
Described washing components 4 comprises a washing tower 41, and described washing tower 41 is provided with moisturizing input aperture 411.Be further dedusting; Described washing components 4 also comprises a Venturi scrubber 42; Be arranged on the input terminus of described washing tower 41, an output terminal of said washing tower is connected with the circulation input terminus of said Venturi scrubber through circulating line 43, forms circulation cleaning; The output terminal of described cleaning apparatus is connected with the input terminus of described Venturi scrubber through pipeline.
The delivery port 44 output crude synthesis gas of described washing tower, its outlet at bottom is connected with the inlet of described grey water handing unit 5 through pipeline; This grey water handing unit also comprises a water supplement port 51.Described grey water handing unit 5 output waste water.
Also comprise a slag bath 14 in the vapourizing furnace of a kind of partial-chilled dry coal powder of the present invention or coal water slurry gasification system, be arranged on the below of the burner hearth of described vapourizing furnace; Described slag bath top is provided with sprinkler head 141, and its bottom is provided with slag-drip opening 142.
In the present invention a kind of partial-chilled the dry coal powder or coal water slurry gasification system, comprise that also a lock slag ladle 6 and drags for slag bath 7, the inlet of described lock slag ladle 6 is connected with described slag-drip opening 142 through pipeline, and its outlet is connected with the described slag bath 7 that drags for through pipeline.Be respectively equipped with valve 1421,71 on the pipeline.
Principle of work of the present invention is:
Dry coal powder or coal water slurry and oxygenant (oxygen, water vapor) are got into the burner hearth of vapourizing furnace together by the nozzle on the vapourizing furnace, vigorous reaction produces the synthetic gas of HTHP in stove, is mainly the gas mixture of carbon monoxide and hydrogen, and temperature is about 1100-1700 ℃.The synthetic gas that produces produces in burner hearth to forward spin flow, and the air-flow eddy flow upwards can make the degree of filling of flame in the burner hearth better, and the temperature field is also comparatively even.Ash in the coal dust mainly leans on inertia effect by under the seizure of vapourizing furnace unit upper taper structure with the form of melting slag in hot environment; Straight again tube wall surface trickling is pooled to the slag flow port of burner hearth bottom; Be discharged to the slag bath quenching that is arranged in the vapourizing furnace below; Pass through dreg-locking hopper then, get into and drag for slag bath, pulp water is separated.Remaining flying dust is synthesized gas and carries secretly from vapourizing furnace top and discharge.
Preliminary chilling facility is arranged in vapourizing furnace top outlet, through water/vapour the HTHP synthetic gas of discharging from top of gasification furnace is carried out partial-chilledly, synthetic gas is reduced to 700～1000 ℃ from 1100～1700 ℃ is beneficial to slag and solidifies.Avoid synthetic gas to carry slag and get into upstream device.
Synthetic gas after partial-chilled passes through the synthetic gas transfer passage; Get into synthetic gas exhaust heat recovery apparatus (being mostly the convective heat exchange face), after cooling, cool to 250～400 ℃, after the synthetic gas entering cleaning apparatus (being mostly cyclonic separator or porcelain filter etc.) after the cooling is removed most of dry ash; Get into Venturi scrubber; Get into washing tower then, remove most of ash remaining in the synthetic gas and lower the temperature and be cooled to 60～200 ℃, thereby obtain qualified synthetic gas.
Can be used as cement raw material through the isolating dry ash of cleaning apparatus recycles.
The buck that washing tower is discharged gets into the grey water handing unit and carries out water treatment.Adopt that cleaning apparatus is separable to go out most dry ash, thereby alleviated washing tower and the unitary load of grey water handing greatly, practice thrift 50% water consumption, the while intractability of buck reduces.
See also Fig. 2.A kind of partial-chilled dry coal powder of the present invention or the gasifying process of coal water slurry gasification system are characterized in, may further comprise the steps:
The step S1 of a, generation synthetic gas:
With dry coal powder or coal water slurry with oxygenant is sent into the burner hearth of vapourizing furnace, vigorous reaction produces HTHP in stove synthetic gas; The temperature of said synthetic gas is about 1100～1700 ℃;
B, the ash of catching in the coal dust are discharged to quenching in the slag bath, then with pulp water separation steps S2:
Ash in the coal dust mainly leans on inertia effect by under the seizure of vapourizing furnace upper furnace pyramidal structure with the form of melting slag in hot environment; Straight again tube wall surface trickling is pooled to the slag flow port of burner hearth bottom; Be discharged to the slag bath quenching that is arranged in the burner hearth below; Get into through the lock slag ladle then and drag for slag bath, pulp water is separated;
C, the synthetic gas that produces is carried out partial-chilled step S3:
Remaining flying dust is synthesized gas and carries secretly from the upper furnace discharge, carries out partial-chilled through chilling facility to the HTHP synthetic gas of discharging from roof of the furnace; Temperature after the said Quench is reduced to 700～1000 ℃;
D, the step S4 that the synthetic gas after partial-chilled is carried out waste heat recovery and cools:
Synthetic gas after partial-chilled gets into synthetic gas exhaust heat recovery apparatus (waste heat boiler can adopt tubular boiler) through the synthetic gas transport pipe, through cool 250～400 ℃ step of convective heat exchange face;
E, to synthetic gas ash disposal, washing after the cooling, the refrigerative step S5 that lowers the temperature once more:
Synthetic gas after the cooling gets into cleaning apparatus (for example being cyclonic separator or porcelain filter) remove most of dry ash after, get into Venturi scrubber, get into washing tower then, remove flying dust remaining in the synthetic gas and lower the temperature and be cooled to 60-200 ℃;
F, obtain qualified synthetic gas S6.
A kind of partial-chilled dry coal powder of the present invention or the gasifying process of coal water slurry gasification system wherein, comprise that also the buck that washing tower is discharged gets into the step S7 that the grey water handing unit carries out water treatment.
The partial-chilled high-temperature synthesis gas of discharging of water/vapour of the present invention from vapourizing furnace burner hearth top, and remove most of dry ash flying dust in the synthetic gas through cleaning apparatus, handle slag through slag bath quenching slag tap.Not only can carry out effective separating treatment to ash and the slag that gasification produces, solve lime-ash and mixed a reluctant difficult problem, utilize the synthetic gas exhaust heat recovery apparatus to reclaim the synthetic gas sensible heat simultaneously, improve efficiency of energy utilization.
Claims (10)
1. partial-chilled dry coal powder or coal water slurry gasification system is characterized in that, comprise the vapourizing furnace, heat recovery equipment, cleaning apparatus, washing components and the grey water handing unit that are linked in sequence through pipeline;
Described vapourizing furnace comprises burner hearth, the coaxial chilling facility of said roof of the furnace, the synthetic gas delivery section that is connected with the output terminal of chilling facility of being arranged on; Described burner hearth is provided with at least one nozzle; Described synthetic gas delivery section is provided with venting port;
The input terminus of described heat recovery equipment is connected with the venting port of described synthetic gas delivery section through pipeline; Its output terminal is connected with described cleaning apparatus input terminus through pipeline;
Described washing components comprises a washing tower; The output terminal of described cleaning apparatus is connected with the input terminus of described washing tower through pipeline;
The delivery port output crude synthesis gas of described washing tower, its outlet at bottom is connected with the unitary inlet of described grey water handing through pipeline; Described grey water handing unit output waste water.
2. a kind of partial-chilled dry coal powder according to claim 1 or coal water slurry gasification system; It is characterized in that; Described washing components also comprises a Venturi scrubber; Be arranged on the input terminus of described washing tower, an output terminal of said washing tower is connected with the circulation input terminus of said Venturi scrubber through circulating line, forms circulation cleaning; The output terminal of described cleaning apparatus is connected with the input terminus of described Venturi scrubber through pipeline.
3. a kind of partial-chilled dry coal powder according to claim 1 or coal water slurry gasification system is characterized in that, also comprise a slag bath, are arranged on the below of the burner hearth of described vapourizing furnace; Described slag bath top is provided with sprinkler head, and its bottom is provided with slag-drip opening.
4. a kind of partial-chilled dry coal powder according to claim 3 or coal water slurry gasification system; It is characterized in that; Comprise that also a lock slag ladle and drags for slag bath, the inlet of described lock slag ladle is connected with described slag-drip opening through pipeline, and its outlet is connected with the described slag bath that drags for through pipeline.
5. a kind of partial-chilled dry coal powder according to claim 1 or coal water slurry gasification system is characterized in that described grey water handing unit also comprises a water supplement port.
6. a kind of partial-chilled dry coal powder according to claim 1 or coal water slurry gasification system is characterized in that the burner hearth of said vapourizing furnace is provided with 4～6 nozzles, symmetric arrangement.
7. a kind of partial-chilled dry coal powder according to claim 1 or coal water slurry gasification system is characterized in that said vapourizing furnace upper furnace and bottom are pyramidal structure, and the centre is straight tube wall surface.
8. the gasifying process of partial-chilled dry coal powder or coal water slurry gasification system is characterized in that, may further comprise the steps:
The step of a, generation synthetic gas:
With dry coal powder or coal water slurry with oxygenant is sent into the burner hearth of vapourizing furnace, vigorous reaction produces HTHP in stove synthetic gas; The temperature of said synthetic gas is about 1100～1700 ℃;
B, the ash of catching in the coal dust are discharged to quenching in the slag bath, then with the pulp water separation steps:
Ash in the coal dust mainly leans on inertia effect by under the seizure of vapourizing furnace upper furnace pyramidal structure with the form of melting slag in hot environment; Straight again tube wall surface trickling is pooled to the slag flow port of burner hearth bottom; Be discharged to the slag bath quenching that is arranged in the burner hearth below; Get into through the lock slag ladle then and drag for slag bath, pulp water is separated;
C, the synthetic gas that produces is carried out partial-chilled step:
Remaining flying dust is synthesized gas and carries secretly from the upper furnace discharge, carries out partial-chilled through chilling facility to the HTHP synthetic gas of discharging from roof of the furnace; Temperature after the said Quench is reduced to 700～1000 ℃;
D, the step that the synthetic gas after partial-chilled is carried out waste heat recovery and cools:
Synthetic gas after partial-chilled passes through the synthetic gas transport pipe, gets into the synthetic gas exhaust heat recovery apparatus, after cooling, cools to 250～400 ℃ step;
E, to synthetic gas ash disposal, washing after the cooling, the refrigerative step of lowering the temperature once more:
Synthetic gas after the cooling gets into cleaning apparatus remove most of dry ash after, get into Venturi scrubber, get into washing tower then, remove most of ash remaining in the synthetic gas and lower the temperature and be cooled to 60～200 ℃;
F, obtain qualified synthetic gas.
9. a kind of partial-chilled dry coal powder according to claim 8 or the gasifying process of coal water slurry gasification system is characterized in that, comprise that also the buck that washing tower is discharged gets into the step that the grey water handing unit carries out water treatment.
10. a kind of partial-chilled dry coal powder according to claim 8 or the gasifying process of coal water slurry gasification system is characterized in that described cleaning apparatus is cyclonic separator or porcelain filter.
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| CN103320170A (en) * | 2013-07-05 | 2013-09-25 | 青岛科技大学 | Low-rank coal gasification method |
| CN103436298A (en) * | 2013-09-04 | 2013-12-11 | 煤炭科学研究总院 | Swirl injection type coal water slurry gasification device |
| CN104017606A (en) * | 2014-06-24 | 2014-09-03 | 中国神华能源股份有限公司 | Coal water slurry gasification process system |
| CN104342213A (en) * | 2013-08-01 | 2015-02-11 | 西门子公司 | Dust separation from the crude gas of an entrained flow gasifier |
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| CN110441491A (en) * | 2018-05-04 | 2019-11-12 | 国家能源投资集团有限责任公司 | Coal seed gasification evaluating apparatus and method |
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