CN202482281U - Two-step method pulverized coal fluidized gasification device - Google Patents
Two-step method pulverized coal fluidized gasification device Download PDFInfo
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- CN202482281U CN202482281U CN2011205688768U CN201120568876U CN202482281U CN 202482281 U CN202482281 U CN 202482281U CN 2011205688768 U CN2011205688768 U CN 2011205688768U CN 201120568876 U CN201120568876 U CN 201120568876U CN 202482281 U CN202482281 U CN 202482281U
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Abstract
The utility model discloses a two-step method pulverized coal fluidized gasification device mainly consisting of a horizontal dry distillation tower or a vertical dry distillation tower, a gasification furnace, a coal gas heat exchanger, a washing tower, an intercooler A, an electric coke capturer, an intercooler B, a draught fan or compressor A; the coal gas inlet of the horizontal dry distillation tower or vertical dry distillation tower is connected with the coal gas outlet of the gasification furnace, the coal gas outlet of the horizontal dry distillation tower or vertical dry distillation tower is connected with the coal gas heat exchanger, and the coal gas heat exchanger is sequentially connected with the washing tower, the intercooler A, the electric coke capturer, the intercooler B and the draught fan or compressor A. The two-step method pulverized coal fluidized gasification device disclosed by the utility model can effectively solve the filtering and circular furnace gasification problems of carbon-containing fly ash brought out by the coal gas during the fluidized gasification process of any coal types, greatly improve the carbon conversion rate, enhance the coal gas heat value and the sensible heat application of the coal gas and reduce the environmental pollution of the fly ash.
Description
Technical field
The utility model relates to the coal gasification field, specifically is a kind of two-step approach powdered coal fluidized bed gasification device.
Background technology
Fluidized-bed gasification is a kind of more advanced gasification technology between fixed bed and air flow bed, and its advantage is to use the fine coal of 0-10mm to make gasified raw material, and coal adaptability is wide; Running cost is low; Gasification does not have tar, and gasification intensity is the height of bed fixedly, invests low than air flow bed.Shortcoming is that the fluidized-bed gasification furnace temperature of exit gas is very high; Usually all 900---1050 ℃, should not adopt bag-type dust, carry a large amount of carbon containing dust in the coal gas secretly; Usually adopt high temperature cyclone separator to separate big dust particle and loop back furnace gasization; Most of trickle carbon containing dust removes with coal gas entering washing tower and is lost, and causes the fluidized-bed efficiency of carbon conversion low, and dust pollution is big.As make vaporized chemical with air merely, and caloric power of gas is lower, has only 900 usually---and 1100 kilocalories/Nm
3Very high for young coal moisture contents such as brown coal, had a strong impact on gasification efficiency, because the thermostability of brown coal is relatively poor, it is easy cracked to be heated, the drying of brown coal is an insoluble technical barrier always.How to reduce the moisture of feed stock for blast furnace coal (particularly brown coal, long-flame coal), reduce the flying dust carbon containing of fluidized-bed gasification, improve caloric power of gas and just become an important techniques problem.
Summary of the invention
The purpose of the utility model provides a kind of two-step approach powdered coal fluidized bed gasification device, with 900 of vapourizing furnace generation---and 1050 ℃ of coal gas feed horizontal dry distillation tower heating, dry, destructive distillation feed coal, filter coal gas with feed coal simultaneously; Add heating gas with coal gas, with red-hot lime-ash heating air or oxygen, with the high-temperature component of water seal sealed rotational; Effectively solve the filtration of the carbon containing flying dust of being taken out of by coal gas in the fluidized-bed gasification process and be recycled into furnace gasization, improve efficiency of carbon conversion greatly, reduce the pollution of flying dust environment; Reduce feed coal moisture; Improve the feed coal charging temperature, improve gasification efficiency, improve caloric power of gas; Improve the sensible heat utilization of coal gas, guarantee the safe operation of gasification system.
The technical scheme of the utility model is: two-step approach powdered coal fluidized bed gasification device mainly contains with the lower section and constitutes: compositions such as dry distillation tower, vapourizing furnace, gas change heater, washing tower, inter cooler A, electric coke catcher, thionizer, inter cooler B, blower fan or compressor A; The dry distillation tower gas entry connects the gasifier gas outlet, and the dry distillation tower gas exit connects gas change heater, and gas change heater connects washing tower, inter cooler A, electric coke catcher, thionizer, inter cooler B, blower fan or compressor A, gas change heater successively through pipeline.
Horizontal dry distillation tower is horizontal rectangular structure; Establish level staggered several layers traveling-grate stoker or chain guipure up and down in the horizontal dry distillation tower; The motion-work wheel of traveling-grate stoker or chain guipure connects power wheel, step-down gear, and the motion-work wheel place establishes annular seal space, and annular seal space is sealed by water seal; Horizontal dry distillation tower top is provided with hopper and connects sealing feeder A, and below, horizontal dry distillation tower inside is provided with built-in hopper and connects sealing feeder B; The inner wall of horizontal dry distillation tower is provided with trilateral water conservancy diversion limit.
Vertical dry distillation tower is vertical right cylinder or vertical rectangular structure; Vertical dry distillation tower gas entry connects the gasifier gas outlet; Vertical dry distillation tower gas exit connects gas change heater, and gas change heater connects washing tower, inter cooler A, electric coke catcher, thionizer, inter cooler B, blower fan or compressor A, gas change heater successively through pipeline; Establish in the vertical dry distillation tower and stir screw rod and screw rod support, vertical dry distillation tower top connects vertical dry distillation tower sealing feeder and vertical dry distillation tower hopper, and the bottom connects vertical dry distillation tower sealing feeder, and vertical dry distillation tower sealing feeder connects vapourizing furnace; Vertical dry distillation tower bottom is provided with branch gas tube; Branch gas tube connects vertical dry distillation tower gas entry; There is the drving sprial bar branch gas tube below, and there is vertical dry distillation tower water seal drving sprial bar below, stirs screw rod and connects the drving sprial bar; The drving sprial bar connects step-down gear, and vertical dry distillation tower bottom is by vertical dry distillation tower water seal sealing.
The vapourizing furnace bottom is provided with air distribution plate, close phase section air or oxygen inlet, air distribution plate air or oxygen inlet, cinder tank; Vapourizing furnace is connected by slag dropping tube with cinder tank; Cinder tank is provided with spiral-type slag eliminator; Be sieve plate below the spiral-type slag eliminator, the cinder tank bottom is an ash lock bucket, and cinder tank is provided with cinder tank air or oxygen inlet; Close phase section air or oxygen inlet, air distribution plate air or oxygen inlet, cinder tank air or oxygen inlet connect blower fan or compressor B.
Dry distillation gas after dry distillation tower filters is through purifying, get into the gas change heater heating after the processed, because of adopting coal gas and coal gas heat exchange, even also can entrained air in the inner coal gas that leaks gas of interchanger, have guaranteed the anti-explosion safety of coal gas.Coal gas is supplied with the user after heating, can improve the sensible heat utilization of coal gas, is particularly suitable for various industrial fuel gas users.The slag from gasifying furnace storehouse adopts heat to be equipped with structure design preheated air or oxygen, makes full use of waste heat, can improve gasification efficiency.The utility model is particularly suitable for the gasification of coals such as the higher brown coal of moisture and volatile matter, bituminous coal, also can play the feed coal preheating for moisture and the lower hard coal of volatile matter, improves the effect of gasification efficiency.No matter the utility model can effectively solve the filtration of the carbon containing flying dust of being taken out of by coal gas in the fluidized-bed gasification process and be recycled into furnace gasization any coal, improves efficiency of carbon conversion greatly, reduces the pollution of flying dust to environment.
Description of drawings
Fig. 1 is the powdered coal fluidized bed gasification apparatus structure synoptic diagram of the utility model.
Fig. 2 is the structural representation of the vertical dry distillation tower of the utility model.
Among the figure: the horizontal dry distillation tower of 1-, 2-hopper, 3-sealing feeder A, 4-traveling-grate stoker or chain guipure, the built-in hopper of 5-, 6-sealing feeder B; The 7-vapourizing furnace, 8-gas line A, the horizontal dry distillation tower gas entry of 9-, the horizontal dry distillation tower gas exit of 10-, 11-gas change heater; The 12-washing tower, 13-inter cooler A, 14-electric coke catcher, 15-thionizer, 16-inter cooler B; 17-blower fan or compressor A, 18-gas line B, 19-trilateral water conservancy diversion limit, 20-step-down gear, 21-power wheel; The 22-motion-work wheel, 23-annular seal space, 24-water seal, 25-slag dropping tube, 26-cinder tank; 27-blower fan or compressor B, 28-cinder tank air or oxygen inlet, 29-air distribution plate air or oxygen inlet, the close phase section of 30-air or oxygen inlet, 31-sieve plate; The 32-air distribution plate, 33-spiral-type slag eliminator, 34-ash lock bucket, the vertical dry distillation tower of 35-, the vertical dry distillation tower hopper of 36-; The vertical dry distillation tower sealing feeder of 37-, the vertical dry distillation tower gas entry of 38-, 39-branch gas tube, the vertical dry distillation tower gas exit of 40-, the vertical dry distillation tower sealing feeder of 41-; 42-stirs screw rod, 43-screw rod support, the vertical dry distillation tower step-down gear of 44-, 45-drving sprial bar, the vertical dry distillation tower water seal of 46-.
Embodiment
Two-step approach powdered coal fluidized bed gasification device is a horizontal dry distillation tower to be set feed coal is done pre-treatment before vapourizing furnace; As shown in Figure 1, the powdered coal fluidized bed gasification device mainly by the horizontal dry distillation tower 1 of horizontal rectangular structure, several layers traveling-grate stoker or chain guipure 4 levels in horizontal dry distillation tower be staggered up and down, vapourizing furnace 7, gas change heater 11, washing tower 12, inter cooler A13, electric coke catcher 14, thionizer 15, inter cooler B16, blower fan or compressor A17 etc. form; Horizontal dry distillation tower gas entry 9 connects the gas exit of vapourizing furnace upper end through gas line A8; Horizontal dry distillation tower gas exit 10 connects gas change heater 11, and gas change heater is connected with washing tower washing tower 12, inter cooler A13, electric coke catcher 14, thionizer 15, inter cooler B16, blower fan or compressor A17 through pipeline successively.
The motion-work wheel 22 of traveling-grate stoker or chain guipure 4 connects power wheel 21, step-down gear 20 through chain; Horizontal dry distillation tower top is provided with hopper 2 and connects sealing feeder A3, and below, horizontal dry distillation tower inside is provided with built-in hopper 5 and connects sealing feeder B6, and sealing feeder B6 connects vapourizing furnace 7; Horizontal dry distillation tower internal edge is established a circle trilateral water conservancy diversion limit 19, and traveling-grate stoker or chain guipure 4 connect motion-work wheel 22, and motion-work wheel connects power wheel 21, and power wheel connects step-down gear 20, and motion-work wheel is covered by annular seal space 23, and the annular seal space opening is by water seal 24 sealings.Close phase section air or oxygen inlet 30 and air distribution plate air or oxygen inlet 29 are arranged at vapourizing furnace 7 bottoms, and vapourizing furnace 7 connects cinder tank 26 by slag dropping tube 5; Cinder tank is provided with spiral-type slag eliminator 33, is sieve plate 31 below the spiral-type slag eliminator, and cinder tank is provided with cinder tank air or oxygen inlet 28; Close phase section air or oxygen inlet 30 is connected blower fan or compressor B27 with air distribution plate air or oxygen inlet 29, cinder tank air or oxygen inlet 28; Cinder tank 26 bottoms are ash lock buckets 34.
Establish the several layers traveling-grate stoker in the horizontal dry distillation tower or chain guipure 4 levels are staggered up and down; Feed coal gets into horizontal dry distillation tower 1 from hopper 2 through sealed screw feeder A3 and evenly scatters at traveling-grate stoker or above the chain guipure 4 from the top; Levels traveling-grate stoker or chain guipure rotate under the driving of motion-work wheel 22 round about; Feed coal is scattered on down one deck traveling-grate stoker or chain guipure, fully contacts with from bottom to top coal gas in the process that feed coal moves, shakes, loosens, scatters on traveling-grate stoker or chain guipure, coal gas to feed coal heat, drying and destructive distillation; The outer water evaporation of feed coal, interior elutriation are gone out, decomposite CH simultaneously
4(methane) and H
2High heat value gas such as (hydrogen) gets into gas change heater 11 with coal gas by horizontal dry distillation tower gas exit 10.
On containing the coal gas of a large amount of carbon containing dust dust being obstructed attached to feed coal when passing the raw material coal seam, form red-hot semicoke through dry, pyrogenous feed coal and get into vapourizing furnace 7 from built-in hopper 5 through sealed screw feeder B6 and gasify.
Each layer traveling-grate stoker or chain guipure and horizontal dry distillation tower wall have big gap; Just directly get into horizontal dry distillation tower gas exit 10 for avoiding coal gas not pass the filtration of raw material coal seam from the gap; Establish a circle trilateral water conservancy diversion limit 19 around below every layer of traveling-grate stoker or chain guipure; Coal gas is directed to traveling-grate stoker or chain guipure central authorities make it pass the raw material coal seam, drops on slope, 19 upper edge, trilateral water conservancy diversion limit under the last layer feed coal and be slipped to down on one deck traveling-grate stoker or the chain guipure.
The rotation of traveling-grate stoker or chain guipure drives power wheel 21 through step-down gear 20 through chain and drives motion-work wheel 22 realizations again.Drive sprocket axle gets in the horizontal dry distillation tower and between horizontal dry distillation tower sidewall and has certain interval; For preventing that coal gas leaks in horizontal dry distillation tower of air admission or the horizontal dry distillation tower; Establish an annular seal space 23 in motion-work wheel 22 outsides; The annular seal space opening is sealed in motion-work wheel 22 in the annular seal space 23 with water seal 24 sealings.
A maximum technical barrier of coal gas heating is because the damaged gas leakage of interchanger causes inclusion of air coal gas, will set off an explosion in case the oxygen level in the coal gas surpasses 0.05%, adds the generation that heating gas just can prevent this danger with gas change heater.The temperature of horizontal dry distillation tower gas exit 10 is 400-500 ℃; Establish a gas change heater 11 at the gas exit place; Returning gas change heater 11 again and carry out heat exchange and heat through purifying cooled coal gas, gas heat is improved more than 200 ℃, made full use of waste heat.
For making full use of waste heat, improve gasification efficiency, the slagging-off system design of vapourizing furnace is that heat is equipped with structure.Lime-ash falls into cinder tank 26 from slag dropping tube 25; Blower fan or compressor B27 send into cinder tank with the air or oxygen warp from air or oxygen inlet 28; Air or oxygen through sieve plate 31 pass red-hot ash bed by preheating after slag dropping tube 25 gets into vapourizing furnaces 7, the two-way air or oxygen close section mutually that gets into air distribution plate and vapourizing furnace respectively after air distribution plate air or oxygen inlet 29, close phase section air or oxygen inlet 30 and the steam is reacted in addition; The macrobead lime-ash is discharged cinder tank through spiral-type slag eliminator 33, and the powdery lime-ash is got rid of cinder tank through ash lock bucket 34.
Less for the coal treatment capacity, the better heat stability of coal, what moisture was lower also can realize through vertical dry distillation tower 35; As shown in Figure 2: vertical dry distillation tower is by forming with the lower section: vertical dry distillation tower 35 is vertical right cylinder or vertical rectangular structure; Establish in it and stir screw rod 42 and screw rod support 43, vertical dry distillation tower top connects vertical dry distillation tower sealing feeder 37 and vertical dry distillation tower hopper 36, and vertical dry distillation tower bottom connects vertical dry distillation tower sealing feeder 41; Sealing feeder 41 connects vapourizing furnace 7; The bottom that branch gas tube 39 passes vertical dry distillation tower 35 gets in the vertical dry distillation tower 35, and branch gas tube 39 connects vertical dry distillation tower gas entry 38, and there is drving sprial bar 45 branch gas tube 39 belows; Stir screw rod 42 and connect drving sprial bar 45, drving sprial bar 45 connects vertical dry distillation tower step-down gear 44 through chain.
Feed coal gets into vertical dry distillation tower 35 from vertical dry distillation tower hopper 36 through vertical dry distillation tower sealed screw feeder 37; 900-1050 ℃ coal gas from vapourizing furnace 7 feeds vertical dry distillation tower bottom by vertical dry distillation tower inlet 38; Feed in the vertical dry distillation tower 35 through several branch gas tubes 39, coal gas passes feed coal from bottom to top, to feed coal heat, drying and destructive distillation; The outer water evaporation of feed coal, interior elutriation are gone out, decomposite CH simultaneously
4(methane) and H
2High heat value gas such as (hydrogen) gets into gas change heater 11 with coal gas by vertical dry distillation tower gas exit 40.
Because vertical dry distillation tower is higher, fills feed coal in the tower, the raw material coal seam is very thick in the tower; The cracked granularity of being heated feed coal reduces, and fine-powder increases, the water analysis fine-powder adhesion of making moist of sening as an envoy to; Stop up the gap between coal particle, reduce the permeability of feed coal, make coal gas be difficult for passing the raw material coal seam; For this reason, some stirring screw rods 42 that vertically distribute of design stir screw rod and are fixed on the screw rod support 43 at two ends about in the of 42 in vertical dry distillation tower; Vertical dry distillation tower step-down gear 44 passes through chain and drives drving sprial bar 45, and drving sprial bar 45 drives and stirs screw rods 42 rotations, and feed coal is shaken, loosened; Increase the permeability of feed coal, make the smooth and easy raw material coal seam of passing of coal gas, fully contact with feed coal.
Stir screw rod 42 and with the bottom contact part certain interval is arranged from the vertical dry distillation tower of vertical dry distillation tower bottom entering 35 inside; For preventing that coal gas leaks in vertical dry distillation tower of air admission or the vertical dry distillation tower, in vertical dry distillation tower water seal 46 of vertical dry distillation tower 35 bottom design with vertical dry distillation tower bottom seals.
Be able to filter on containing the coal gas of a large amount of carbon containing dust dust being obstructed attached to feed coal when passing the raw material coal seam, form red-hot semicoke through dry, pyrogenous feed coal and get into vapourizing furnaces 7 through vertical dry distillation tower sealing feeder 41 and gasify.
Claims (3)
1. a two-step approach powdered coal fluidized bed gasification device is characterized in that mainly being made up of horizontal dry distillation tower or vertical dry distillation tower, vapourizing furnace, gas change heater, washing tower, inter cooler A, electric coke catcher, thionizer, inter cooler B, blower fan or compressor A; Horizontal dry distillation tower or vertical dry distillation tower gas entry connect the gasifier gas outlet; Horizontal dry distillation tower or vertical dry distillation tower gas exit connect gas change heater, and gas change heater connects washing tower, inter cooler A, electric coke catcher, thionizer, inter cooler B, blower fan or compressor A successively.
2. according to the said two-step approach powdered coal fluidized bed gasification of claim 1 device, it is characterized in that horizontal dry distillation tower is horizontal rectangular structure, establish the several layers traveling-grate stoker in the horizontal dry distillation tower or chain guipure level is staggered up and down; Establish a circle trilateral water conservancy diversion limit around every layer of traveling-grate stoker or the chain guipure below; Traveling-grate stoker or chain guipure connect motion-work wheel, and motion-work wheel connects power wheel, and power wheel connects step-down gear; Motion-work wheel is covered by annular seal space, and the annular seal space opening is sealed by water seal.
3. according to the said two-step approach powdered coal fluidized bed gasification of claim 1 device; It is characterized in that vertical dry distillation tower is vertical right cylinder or vertical rectangular structure; The stirring screw rod is set in vertical dry distillation tower; Stir screw rod and connect the drving sprial bar, the drving sprial bar connects vertical dry distillation tower step-down gear, stirs screw rod and vertical dry distillation tower bottom gap and seals with vertical dry distillation tower water seal.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205688768U CN202482281U (en) | 2011-12-31 | 2011-12-31 | Two-step method pulverized coal fluidized gasification device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011205688768U CN202482281U (en) | 2011-12-31 | 2011-12-31 | Two-step method pulverized coal fluidized gasification device |
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| CN202482281U true CN202482281U (en) | 2012-10-10 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103980949A (en) * | 2014-05-19 | 2014-08-13 | 昊华骏化集团有限公司 | Segmented pyrolyzing and selective utilizing method and device for emission-free high-volatile-matter feed coal |
| CN103980946A (en) * | 2014-05-19 | 2014-08-13 | 昊华骏化集团有限公司 | No-emission anthracite segmented pyrolysis and upgrading utilization method and no-emission anthracite segmented pyrolysis and upgrading utilization device |
| CN104501171A (en) * | 2014-12-24 | 2015-04-08 | 山东华源锅炉有限公司 | RDF (refuse derived fuel) pyrolysis and gasification system |
| CN110776233A (en) * | 2018-07-30 | 2020-02-11 | 因康热处理设备（上海）有限公司 | Material conveying mechanism for pyrolysis and thermal cracking furnace and pyrolysis and thermal cracking furnace |
-
2011
- 2011-12-31 CN CN2011205688768U patent/CN202482281U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103980949A (en) * | 2014-05-19 | 2014-08-13 | 昊华骏化集团有限公司 | Segmented pyrolyzing and selective utilizing method and device for emission-free high-volatile-matter feed coal |
| CN103980946A (en) * | 2014-05-19 | 2014-08-13 | 昊华骏化集团有限公司 | No-emission anthracite segmented pyrolysis and upgrading utilization method and no-emission anthracite segmented pyrolysis and upgrading utilization device |
| CN103980949B (en) * | 2014-05-19 | 2016-06-29 | 汤广斌 | A kind of without discharge high-volatile feed coal segmentation pyrolysis sub-prime Application way and device |
| CN104501171A (en) * | 2014-12-24 | 2015-04-08 | 山东华源锅炉有限公司 | RDF (refuse derived fuel) pyrolysis and gasification system |
| CN110776233A (en) * | 2018-07-30 | 2020-02-11 | 因康热处理设备（上海）有限公司 | Material conveying mechanism for pyrolysis and thermal cracking furnace and pyrolysis and thermal cracking furnace |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121010 Termination date: 20141231 |
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