CN2069414U - Brown coal fully-gasifying furnace with atmospheric fixed bed - Google Patents
Brown coal fully-gasifying furnace with atmospheric fixed bed Download PDFInfo
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- CN2069414U CN2069414U CN 90206271 CN90206271U CN2069414U CN 2069414 U CN2069414 U CN 2069414U CN 90206271 CN90206271 CN 90206271 CN 90206271 U CN90206271 U CN 90206271U CN 2069414 U CN2069414 U CN 2069414U
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Abstract
The utility model relates to a brown coal fully-gasifying furnace with a normal-pressure fixed bed. The utility model is characterized in that the inside of the furnace is also provided with a heat exchanger, a coal gas withdrawing pipe and a condenser, and the heat exchanger is integrally connected with the coal gas withdrawing pipe. The brown coal fully-gasifying furnace with a normal-pressure fixed bed not only increases the gasifying efficiency and the overall thermal efficiency, and also adds the thermal value of the coal gas. The tar quantity in the coal gas is reduced, and the complete gasification of the brown coal is realized. The young brown coal with the lower grade is changed into the gas fuel with the high grade. The utility model has great practicability for the enlarging of the resource utilization range of China.
Description
The utility model relates to a kind of novel atmospheric fixed bed brown coal stove that is gasified totally, and particularly relates to a kind of fixed bed atmospheric pressure vapourizing furnace that the young brown coal of high-moisture, big volatile matter can be gasified totally.
Existing fixed bed atmospheric gasification stove adopts the reverse-flow structure of feed coal and gasification product countercurrent flow, and its gasification level from bottom to top is ash bed, zone of oxidation, reducing zone, destructive distillation layer, drying layer; Coal gas forms the back by the destructive distillation layer, discharge from drying layer top at last in zone of oxidation and reducing zone, if fugitive constituent and moisture content are higher in the feed coal, then tar in the coal gas and moisture content just increase sharply, cause pipeline, equipment to stop up, this kind stove force gasification to stop, so can only be used for moisture content and the few high-grade fuel of volatile content; Chinese patent CN86206045U has announced a kind of reflecting gas producer, coal gas and fuel are all to same direction motion, coal gas is drawn out of from furnace bottom, responding layer has only ash bed, reducing zone, zone of oxidation and a small amount of destructive distillation layer, no drying layer, if use high moisture content bunker coal will cause the interior temperature of stove to descend, cause burning to stop rapidly, reaction can't be carried out, so this kind stove is not suitable for the brown coal of high moisture content, high-volatile equally.
The purpose of this utility model just is to overcome the deficiency of prior art, a kind of not only aerogenesis continuously is provided, but also can be adapted to high moisture content, the stove that is gasified totally of the brown coal that the brown coal of big fugitive constituent are especially comparatively young.
The utility model is to realize its purpose by following technical proposal: it is by coal bunker (1) material-feeding mechanism (2), air port (5), grate (7), refractory materials (11), vision slit (9), valve (13), (15) form, in stove, also be provided with the heat exchanger (4) that gas heat can be passed to bunker coal and with the coal gas that links to each other extract pipe (12) out, coal gas is extracted pipe (12) out and is placed on the stove axis, what link to each other with this extraction pipe is that coal gas is extracted interface tube (14) and blow-off valve (15) out, being provided with at place, upper of furnace body furnace wall can be with condenser (3) and the water of condensation outlet valve (13) of water recovery Cheng Shui, when making its burning more complete, on the ash door (6) that communicates with grate (7), be provided with adjustable air door for carbon residue in the stove is reoxidized.
Fig. 1 is the structure iron of the utility model;
Below in conjunction with embodiment the utility model is further described.Be not limited thereto but hold within the utility model.
1-coal bunker among the figure, 2-cloth (blanking) structure, 3-condenser, the 4-heat exchanger, 5-air port, 6-ash door, the 7-grate, the 8-gas inlet, 9-vision slit, 10-air preheater, the 11-refractory materials, 12-coal gas is extracted pipe, 13-water discharge valve out, and 14-extracts interface tube, 15-blow-off valve out.
The coal gas that the coal-fired back that reacts in stove generates is extracted out from extracting pipe (12) out, in the process that coal gas is drawn out of, its sensible heat is passed to feed coal by the heat exchanger (4) that links to each other with coal gas extraction pipe, for it provides dry and the needed thermal source of destructive distillation, bunker coal is heated at this, and temperature raises and start vaporizer goes out water vapor, because vapour pressure radially reducing along stove, so water vapor is driven toward the furnace wall, after the condenser (3) by this place is condensed into water; Discharge out of the furnace by valve (13) through water seal, account for 70% at this moisture content that evaporates, the coal-fired heat heating that in continuing the process that descends, is constantly come automatic heat-exchanger, temperature raises gradually, when temperature rise to 150 ℃, fugitive constituent in the coal is just volatilized to come out, form the coal tar mist of oil, coal is in the decline process, temperature is more and more higher, when having arrived near the tuyere zone, and the air vigorous oxidation that is preheated, form the promptly main zone of oxidation of red-hot zone of combustion one, this moment, temperature was 800～1000 ℃, because coal gas is extracted the extraction suction function of pipe out, coal tar mist of oil and part water vapor are rapidly by this red-hot layer, and at high temperature the coal tar mist of oil is cracked into low-molecular-weight hydrocarbon, and water vapour also is decomposed simultaneously and enters the bottom of main zone of oxidation with the gas that is produced that burns.Here the coal tar splitting gas further is fixed, water vapor that decomposes and products of combustion and red-hot charcoal generation water-gas reaction and air gas reaction, the coal tar cracking coal gas that is generated, water-gas, air gas are together extracted out pipe by coal gas and are taken away, and the gasification reaction that is produced mainly contains during this period:
The cracking thermo-negative reaction of gas coke mist of oil:
Because thermo-negative reaction is more, its temperature is reduced, partly carbon residue can not get perfect combustion simultaneously, and cause unnecessary waste, for this reason, be provided with adjustable air door on the ash door that the utility model also communicates with grate in the zone of combustion bottom, further burning is fully to introduce carbon residue that secondary air makes the fuel bed bottom, carry out the reaction of part air gas in the after-flame carbon residue, reaction product is extracted out pipe by coal gas and is taken away.
Because the utility model is extracted pipe out by coal gas the coal gas that produces in the stove is extracted out, and coal gas carries out various reacting by heating by heat exchanger to feed coal with its sensible heat in the process that is drawn out of, therefore this stove can not only improve gasification efficiency and overall thermal efficiency, but also increased caloric power of gas, reduce moisture content and tar content in the coal gas, coal is gasified totally, thereby make low-grade young brown coal become high-grade geseous fuel and be applied to all trades and professions, have very high value enlarging the china natural resources utilization.
Claims (5)
1, a kind of novel atmospheric fixed bed brown coal stove that is gasified totally, constitute by coal bunker (1), material-feeding mechanism (2), air port (5), grate (7), refractory materials (11), vision slit (9), valve (13) (15), it is characterized in that also being provided with in the stove energy gas heat is passed to the heat exchanger (4) of bunker coal, and extract the coal gas that the coal gas that is produced in the stove is extracted out out pipe (12) and the moisture content that bunker coal is evaporated is condensed into the condenser (3) of water.
2, vapourizing furnace according to claim 1 is characterized in that heat exchanger (4) and coal gas extraction pipe (12) are connected as a single entity.
3, vapourizing furnace according to claim 1 is characterized in that coal gas extraction pipe (12) places on the axis of producer gas generator, and is connected with coal gas extraction interface tube (14) and blow-off valve (15) at an upper portion thereof.
4, vapourizing furnace according to claim 1 is characterized in that condenser (3) is located at furnace wall, the top place of body of heater.
5, vapourizing furnace according to claim 1 is characterized in that being provided with adjustable air door on Hui Men (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90206271 CN2069414U (en) | 1990-05-09 | 1990-05-09 | Brown coal fully-gasifying furnace with atmospheric fixed bed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90206271 CN2069414U (en) | 1990-05-09 | 1990-05-09 | Brown coal fully-gasifying furnace with atmospheric fixed bed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2069414U true CN2069414U (en) | 1991-01-16 |
Family
ID=4886894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90206271 Withdrawn CN2069414U (en) | 1990-05-09 | 1990-05-09 | Brown coal fully-gasifying furnace with atmospheric fixed bed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2069414U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101955779A (en) * | 2010-09-16 | 2011-01-26 | 合肥天焱绿色能源开发有限公司 | Solid biomass internal-combustion dry distillation gasification furnace |
-
1990
- 1990-05-09 CN CN 90206271 patent/CN2069414U/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101955779A (en) * | 2010-09-16 | 2011-01-26 | 合肥天焱绿色能源开发有限公司 | Solid biomass internal-combustion dry distillation gasification furnace |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |