CN210463572U - Semi-gasification biomass combustion hot blast stove - Google Patents
Semi-gasification biomass combustion hot blast stove Download PDFInfo
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- CN210463572U CN210463572U CN201920738713.6U CN201920738713U CN210463572U CN 210463572 U CN210463572 U CN 210463572U CN 201920738713 U CN201920738713 U CN 201920738713U CN 210463572 U CN210463572 U CN 210463572U
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Abstract
The utility model discloses a semi-gasification biomass combustion hot blast stove, wherein a front interference smoke wall, a rear arch and the like are arranged in a stove body; the rear arch, the front interference smoke wall, the rear arch smoke wall and the furnace body form a gas combustion area: the rear arch smoke wall, the rear interference smoke wall and the furnace body form a settling chamber; a horizontal chain grate and a front arch and a rear arch respectively form a pyrolysis gasification area and a solid combustion area, and by utilizing the characteristic of high volatile components of biomass fuels such as straws and the like, volatile components of the fuels are separated out in the pyrolysis gasification area and are combusted in a gas combustion area, and residual fixed carbon is completely combusted in the solid combustion area to form semi-gasification combustion of the biomass fuels. The surface of the fire grate is not coked, and the wall surface of the hearth is not coked, so that the long-term stable operation of the hot blast stove is ensured, and the furnace is not required to be stopped for coke cleaning; a recirculation flue structure is arranged at the opening of the gas combustion area, and the temperature of the gas combustion area and the oxygen content in the discharged flue gas are reduced by controlling the blowing-in amount of the recirculated flue gas, so that the generation of thermal nitrogen oxides is reduced; the settling chamber structure settles most of fly ash in the flue gas, thereby achieving the purpose of controlling dust emission.
Description
Technical Field
The utility model provides a semi-gasification burning living beings hot-blast furnace is the improvement to current living beings hot-blast boiler structure, belongs to living beings hot-blast furnace technical field.
Background
The existing biomass hot air boiler mostly adopts a burner form, burns in a fixed combustion chamber through biomass fuel, forcibly blows flame into a hearth, is easy to coke, has low fuel utilization rate, great loss of incomplete combustion of solids, low boiler efficiency and standard exceeding of nitrogen oxides, and simultaneously cannot control dust emission and pollute the atmospheric environment due to the influence of a settling chamber structure.
Disclosure of Invention
The utility model discloses a semi-gasification burning living beings hot-blast furnace, through the chain grate air exhaust chamber arrange with around the improvement of encircleing, when making biomass fuel fully burn on the chain grate, through the temperature of the interior high-temperature region of recirculated flue gas control furnace, restrain nitrogen oxide's formation, arch the top at the subsider and back and set up the interference flue wall, dust content in the control flue gas reaches energy-concerving and environment-protective, guarantees boiler efficiency's purpose.
The utility model provides a pair of semi-gasification burning living beings hot-blast furnace, its technical solution as follows:
the furnace body is a closed kiln body built by refractory bricks, red bricks and refractory cement; a layer of refractory brick inner wall is lined in the furnace body; the front end of the furnace body is a hopper;
a recirculation flue port, a front interference flue wall, a rear arch flue wall, a rear interference flue wall and a flue gas outlet are sequentially arranged in the furnace body from front to back; wherein, the back encircles, preceding interference smoke wall, encircles the smoke wall and furnace body after, constitutes the gas combustion district: the rear arch smoke wall, the rear interference smoke wall and the furnace body form a settling chamber;
the front part in the furnace body is provided with a horizontal chain grate which is of an annular structure and rotates circularly; the front end of the horizontal chain grate is positioned at the lower part of the hopper; the tail part of the horizontal chain grate is connected with a slag outlet;
in the furnace body, the front part of the horizontal traveling grate stoker and the front arch form a cracking gasification area; the rear part of the horizontal chain grate and the rear arch form a solid combustion area;
a plurality of air chambers are arranged below the rear part of the horizontal chain grate to provide primary air for the horizontal chain grate to support combustion;
a throat is formed above the front arch and the rear arch; the recirculation flue port is positioned above the throat port, and the recirculation flue gas is blown into the gas combustion area, so that the temperature of the gas combustion area and the oxygen content in the discharged flue gas are reduced, and the generation of thermal nitrogen oxides is further reduced;
a secondary air chamber is also arranged at the throat at the top of the front arch, secondary air is provided for supporting combustion for the solid combustion area, and meanwhile, the flow field of flame below the throat is interfered, so that the residence time of the flame is prolonged, and the combustion efficiency is improved;
most of fly ash in the flue gas is settled above the rear arch and in the settling chamber under the interference of the front interference flue wall, the rear arch flue wall and the settling chamber interference wall, and the flue gas is discharged out of the furnace body through the flue gas outlet for standby.
In the use process of the utility model, the fuel falls on the horizontal chain grate through the hopper, and the front 1/3 part (in the pyrolysis gasification area) of the grate has no combustion-supporting air (the front part of the horizontal chain grate is not provided with an air chamber), so that the fuel is cracked under the condition of high temperature and oxygen deficiency to separate out combustible gas, and enters the gas combustion area for combustion; the residual fixed carbon in the fuel on the horizontal chain grate enters a solid combustion area along with the horizontal chain grate, is discharged out of the furnace through a slag outlet after being completely combusted, and the semi-gasification combustion process of the fuel is completed.
The utility model has the advantages of:
a horizontal chain grate and a front arch and a rear arch respectively form a pyrolysis gasification area and a solid combustion area, and by utilizing the characteristic of high volatile components of biomass fuels such as straws and the like, volatile components of the fuels are separated out in the pyrolysis gasification area and are combusted in a gas combustion area, and residual fixed carbon is completely combusted in the solid combustion area to form semi-gasification combustion of the biomass fuels. The surface of the fire grate is not coked, and the wall surface of the hearth is not coked, so that the long-term stable operation of the hot blast stove is ensured, and the furnace is not required to be stopped for coke cleaning; a recirculation flue structure is arranged at the opening of the gas combustion area, and the temperature of the gas combustion area and the oxygen content in the discharged flue gas are reduced by controlling the blowing-in amount of the recirculated flue gas, so that the generation of thermal nitrogen oxides is reduced; the settling chamber structure settles most of fly ash in the flue gas, thereby achieving the purpose of controlling dust emission.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic top view of the present invention;
FIG. 3 is a schematic cross-sectional view of the structure of the present invention;
in the figure, 1, a furnace body; 2. A refractory brick inner wall; 3. Circulating the flue; 4. A front interference smoke wall; 5. A rear arch; 6. a rear arch smoke wall; 7. a settling chamber; 8. a rear interference wall; 9. a flue gas outlet; 10. a slag outlet; 11. a horizontal traveling grate; 12. an air chamber; 13. a secondary air chamber; 14. front arch; 15. a hopper; 16. a pyrolysis gasification zone; 17. a laryngeal opening; 18. a solids combustion zone; 19. a gas combustion zone.
Detailed Description
The invention is further explained below with reference to the drawings:
referring to fig. 1-3, the semi-gasification biomass combustion hot blast stove mainly comprises a horizontal chain grate 11 and a stove body 1; wherein, the furnace body 1 is a closed kiln body built by refractory bricks, red bricks and refractory cement; the furnace body 1 is lined with a layer of refractory brick inner wall 2; the front end of the furnace body 1 is a hopper 15.
As shown in fig. 1, a circulating flue port 3, a front interference flue wall 4, a rear arch 5, a rear arch flue wall 6, a rear interference flue wall 8 and a flue gas outlet 9 are sequentially arranged in a furnace body 1 from front to back; wherein, the rear arch 5, the front interference smoke wall 4, the rear arch smoke wall 6 and the furnace body 1 form a gas combustion area 19: the rear arch smoke wall 6, the rear interference smoke wall 8 and the furnace body 1 form a settling chamber 7;
the front part in the furnace body 1 is provided with a horizontal chain grate 11, and the horizontal chain grate 11 is of an annular structure and rotates circularly; the front end of the horizontal traveling grate 11 is positioned at the lower part of the hopper 15; the tail part of the horizontal traveling grate 11 is connected with a slag outlet 10;
in the furnace body 1, the front part of the horizontal traveling grate 11 and a front arch 14 form a pyrolysis gasification area 16; the rear part of the horizontal traveling grate 11 and the rear arch 5 form a solid combustion area 18;
a plurality of air chambers 12 are arranged below the rear part of the horizontal chain grate 11 to provide primary air for a solid combustion area 18 to support combustion;
a throat 17 is formed above the front arch 14 and the rear arch 5; the recirculation flue port 3 is positioned above the throat 17, and is used for blowing recirculated flue gas into the gas combustion zone 19, so that the temperature of the gas combustion zone and the oxygen content in the discharged flue gas are reduced, and the generation of thermal nitrogen oxides is further reduced;
a secondary air chamber 13 is also arranged at the throat 17 at the top of the front arch 4 to provide secondary air for supporting combustion for the solid combustion area 18, and simultaneously, the flow field of flame below the throat 17 is interfered, so that the residence time of the flame is prolonged, and the combustion efficiency is improved.
Most of fly ash in the flue gas is settled at the rear upper part of the rear arch 5 and in the settling chamber 7 under the interference of the front interference flue wall 4, the rear arch flue wall 6 and the settling chamber interference wall 8, and the flue gas generated by fuel combustion is discharged out of the furnace body through the flue gas outlet 9 for standby. The fuel falls into the horizontal traveling grate 11 through the hopper 15, because the front part of the horizontal traveling grate 11 is not provided with an air chamber, the fuel in the pyrolysis gasification zone is pyrolyzed to separate out combustible gas through high-temperature oxygen-poor conditions, and the combustible gas enters a gas combustion zone for combustion; the residual fixed carbon in the fuel moves backwards along with the horizontal chain grate 11, enters a solid combustion area, is discharged out of the furnace through a slag outlet 10 after being completely combusted, and the semi-gasification combustion process of the fuel is completed.
Claims (3)
1. The utility model provides a half gasification burning living beings hot-blast furnace which characterized in that:
the furnace body is a closed kiln body built by refractory bricks, red bricks and refractory cement; a layer of refractory brick inner wall is lined in the furnace body; the front end of the furnace body is a hopper;
a circulating flue port, a front interference flue wall, a rear arch flue wall, a rear interference flue wall and a flue gas outlet are sequentially arranged in the furnace body from front to back; wherein, the rear arch, the front interference smoke wall, the rear arch smoke wall and the furnace body form a gas combustion area; the rear arch smoke wall, the rear interference smoke wall and the furnace body form a settling chamber; a throat is formed by the upper end of the rear arch and the front arch;
the front part in the furnace body is provided with a horizontal chain grate which is of an annular structure and rotates circularly; the front end of the horizontal chain grate is positioned at the lower part of the hopper; the tail part of the horizontal chain grate is connected with a slag outlet;
in the furnace body, the front part of the horizontal traveling grate stoker and the front arch form a cracking gasification area; the rear part of the horizontal chain grate and the rear arch form a solid combustion area;
a plurality of air chambers are arranged below the rear part of the horizontal traveling grate stoker to provide primary air for the horizontal traveling grate stoker to support combustion.
2. The semi-gasification biomass-burning hot blast stove according to claim 1, characterized in that:
the recirculation flue port is positioned above the throat port, and the recirculation flue gas is blown into the gas combustion area, so that the temperature of the gas combustion area and the oxygen content in the discharged flue gas are reduced, and the generation of thermal nitrogen oxides is further reduced.
3. The semi-gasification biomass-burning hot blast stove according to claim 1 or 2, characterized in that: a secondary air chamber is also arranged at the throat at the top of the front arch, secondary air is provided for supporting combustion of the solid combustion area, and meanwhile, the flow field of flame below the throat is interfered, so that the residence time of the flame is prolonged, and the combustion efficiency is improved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920738713.6U CN210463572U (en) | 2019-05-22 | 2019-05-22 | Semi-gasification biomass combustion hot blast stove |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920738713.6U CN210463572U (en) | 2019-05-22 | 2019-05-22 | Semi-gasification biomass combustion hot blast stove |
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| CN210463572U true CN210463572U (en) | 2020-05-05 |
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| CN201920738713.6U Active CN210463572U (en) | 2019-05-22 | 2019-05-22 | Semi-gasification biomass combustion hot blast stove |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110953712A (en) * | 2019-12-31 | 2020-04-03 | 吉林省东辉生物质能源有限公司 | Semi-gasification biomass combustion hot blast stove |
| CN111853811A (en) * | 2020-08-13 | 2020-10-30 | 江苏利百川环保科技有限公司 | Household garbage pyrolysis gasification chain grate furnace |
| CN112432159A (en) * | 2020-11-20 | 2021-03-02 | 哈尔滨工业大学 | Reverse alpha-shaped flame air distribution type grate-fired furnace combustion system and method |
-
2019
- 2019-05-22 CN CN201920738713.6U patent/CN210463572U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110953712A (en) * | 2019-12-31 | 2020-04-03 | 吉林省东辉生物质能源有限公司 | Semi-gasification biomass combustion hot blast stove |
| CN111853811A (en) * | 2020-08-13 | 2020-10-30 | 江苏利百川环保科技有限公司 | Household garbage pyrolysis gasification chain grate furnace |
| CN112432159A (en) * | 2020-11-20 | 2021-03-02 | 哈尔滨工业大学 | Reverse alpha-shaped flame air distribution type grate-fired furnace combustion system and method |
| CN112432159B (en) * | 2020-11-20 | 2023-07-04 | 哈尔滨工业大学 | Combustion system and method for anti-alpha flame air distribution type grate-fired furnace |
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Address after: Wu Lin Xiang Wu Lin Cun Da Miao Tun, Jiaohe City, Jilin City, 132000 Jilin Province Patentee after: Jilin Shouqing Energy Co., Ltd Address before: 132514 Jilin city of Jilin province Jiaohe City, Wu Lin Xiang Wu Lin Cun Da Miao Tun Patentee before: JIAOHE SHOUQING NEW ENERGY Co.,Ltd. |