CN106918046B - Rotary fire grate of garbage gasification furnace - Google Patents
Rotary fire grate of garbage gasification furnace Download PDFInfo
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- CN106918046B CN106918046B CN201710263423.6A CN201710263423A CN106918046B CN 106918046 B CN106918046 B CN 106918046B CN 201710263423 A CN201710263423 A CN 201710263423A CN 106918046 B CN106918046 B CN 106918046B
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- CN
- China
- Prior art keywords
- fire grate
- grate
- water inlet
- cavity
- gasification furnace
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23H—GRATES; CLEANING OR RAKING GRATES
- F23H9/00—Revolving-grates; Rocking or shaking grates
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/02—Fixed-bed gasification of lump fuel
- C10J3/20—Apparatus; Plants
- C10J3/34—Grates; Mechanical ash-removing devices
- C10J3/40—Movable grates
- C10J3/42—Rotary grates
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/72—Other features
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0913—Carbonaceous raw material
- C10J2300/0946—Waste, e.g. MSW, tires, glass, tar sand, peat, paper, lignite, oil shale
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Combustion & Propulsion (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Incineration Of Waste (AREA)
- Solid-Fuel Combustion (AREA)
Abstract
A rotary fire grate of a garbage gasification furnace is in a cavity spiral shape, is arranged on a fire grate rotary seat and can rotate along with the fire grate rotary seat; the pitch port of the fire grate is in an open spiral shape, and the upper edge of the pitch port is provided with a cutting edge; air inlet pipes penetrating through the fire grate cavity are uniformly arranged on the fire grate; the middle of the bottom surface of the grate cavity is provided with a water inlet, a vertical water inlet pipe is connected below the water inlet, the vertical water inlet pipe is connected with a horizontal water inlet pipe through a rotary joint, and a water outlet is arranged on the bottom surface of the grate cavity at the edge cutting edge position on the pitch port. The invention solves the problems that the generated coke blocks can not be decomposed and discharged, the coke blocks are out of the wind, negative pressure is formed in the air chamber cavity, and the gasification furnace can not continuously produce in the process of burning and treating garbage by the garbage gasification furnace in the prior art; the transverse shearing, crushing and coke discharging of large-area coke blocks in the combustion chamber are realized, and all combustion substances can be completely discharged; the circulating water in the fire grate solves the problem of cooling the fire grate and greatly prolongs the service life of the fire grate.
Description
Technical Field
The invention relates to a fire grate device of a garbage gasification furnace.
Background
The garbage is solid waste generated in daily life and production of human beings, and needs harmless, resource and social treatment due to large and complex amount and pollution, resource and socialization. The garbage gasification furnace converts household garbage into combustible gas by low-temperature combustion and cracking, and the combustible gas can be used for power generation, boiler burning and the like after being purified. Due to the complexity of the garbage, after the garbage is combusted by the gasification furnace, ash slag is formed into large coke, one ash slag with small density floats on the water surface, and the other ash slag with larger density and smaller volume is deposited under water. The fire grates of the garbage gasification furnaces in the prior art are all in a T-shaped swing type, large blocks of coke adhered on the fire grates cannot be decomposed and unloaded, the coke blocks are shielded from wind, negative pressure is formed in an air chamber, and continuous production cannot be realized. The air chamber and the furnace bottom in the prior art are all integrated, and the bottom is a cylindrical water tank which is equivalent to a slag discharging chamber. The existing garbage gasification furnaces are downward air draft, a T-shaped grate cannot be subjected to air cooling or water cooling, a grate cannot be cooled, the grate is often burnt out, and the service life of the grate is very short. Because the garbage gasification furnace in the prior art can not continuously produce, the production efficiency is low and the production cost is higher.
Disclosure of Invention
The invention aims to design a rotary grate of a garbage gasification furnace, which can effectively solve the problem of large coking and can crush and completely discharge coke; the service life of the fire grate is greatly prolonged after the fire grate is cooled by circulating water, and a series of problems in the prior art are solved.
The technical scheme adopted for achieving the purpose of the invention is as follows: the fire grate is in a cavity spiral shape and is arranged on a fire grate revolving base and can rotate along with the fire grate revolving base; the pitch port of the fire grate is in an open spiral shape, and the upper edge of the pitch port is provided with a cutting edge; air inlet pipes penetrating through the fire grate cavity are uniformly arranged on the fire grate; the middle of the bottom surface of the grate cavity is provided with a water inlet, a vertical water inlet pipe is connected below the water inlet, the vertical water inlet pipe is connected with a horizontal water inlet pipe through a rotary joint, and a water outlet is arranged on the bottom surface of the grate cavity at the edge cutting edge position on the pitch port.
The cutting edge on the upper edge of the screw pitch opening is arranged above or below the screw pitch opening.
The spiral of the grate is a single-end spiral or a double-end spiral.
The upper edge and the lower edge of the pitch port are mutually overlapped by 50-100mm.
The invention has the positive effects that: the problems that the generated coke blocks can not be decomposed and discharged, the coke blocks are shielded from wind, negative pressure is formed in the air chamber cavity, and the gasification furnace can not continuously produce in the process of burning and treating garbage of the garbage gasification furnace in the prior art are thoroughly solved; the rotary grate realizes the transverse shearing, crushing and coke discharging of large-area coke blocks in the combustion chamber, and all the combustion substances can be completely discharged; the circulating water in the fire grate solves the problem of cooling the fire grate and greatly prolongs the service life of the fire grate.
Drawings
FIG. 1 is a schematic view of the present invention in use; FIG. 2 is a schematic top view of FIG. 1; fig. 3 isbase:Sub>A sectional view taken along linebase:Sub>A-base:Sub>A of fig. 2.
Detailed Description
FIG. 1 is a schematic view of the using state of the invention, the fire grate 2 is a cavity spiral, the spiral of the fire grate 2 is a single-end spiral, and is formed by welding steel pipes and steel plates, and is arranged at the bottom of the garbage combustion chamber 3 and mounted on a fire grate revolving seat 5, the fire grate revolving seat 5 is connected to a fire grate revolving seat fixing seat 19 through rolling balls 13, the fire grate revolving seat fixing seat 19 is fixed on a fixing sleeve 12 through bolts 6, and the other end of the fixing sleeve 12 is fixed on the wall of a cylindrical wind shield 9 at the lower part of the garbage gasification furnace; a circle of pin shafts 14 are uniformly arranged on the periphery of the outer surface of the bottom of the grate rotating seat 5, and a grate speed reducer 22 is fixed on the outer wall of the air chamber 10 of the waste gasification furnace through a base 23; an output gear 21 on a fire grate speed reducer 22 drives pin shafts 14 around the bottom of a fire grate rotary seat 5 to drive a fire grate 2 to rotate clockwise (as shown in attached figures 2 and 3); the grate 2 is uniformly provided with an air inlet pipe 17 penetrating through the cavity of the grate, and the diameter of the air inlet pipe 17 is set to be 20-40mm according to the biomass garbage or the household garbage; the pitch mouth of the fire grate 2 is in an open spiral shape, the pitch is about 150-250mm, the upper edge of the pitch mouth is provided with a cutting edge 20, the cutting edge 20 faces upwards, and the upper edge and the lower edge of the pitch mouth are overlapped by 80mm (shown in figures 1 and 2); a water inlet is arranged in the middle of the bottom surface of the cavity of the fire grate 2, a vertical water inlet pipe 4 is connected below the water inlet, the vertical water inlet pipe 4 is connected with a transverse water inlet pipe 18 through a rotary joint 7, and a water outlet 16 is arranged on the bottom surface of the fire grate cavity at the position of the upper edge cutting edge 20 of the screw pitch port; in order to increase the breaking force of the large coke blocks, coke baffles 1 are uniformly arranged on the peripheral wall of the bottom of the garbage combustion chamber contacted with the fire grate 2, the cross section of each coke baffle 1 is triangular, the coke baffles are vertically arranged and welded on the peripheral inner wall of the bottom of the garbage combustion chamber 3, and the direction of a coke baffle cutting edge of each coke baffle 1 is opposite to the rotating direction of the fire grate 2.
The working process of the invention is as follows: cooling water enters the vertical water inlet pipe 4 through the transverse water inlet pipe 18 and the rotary joint 7, then enters the fire grate cavity through the water inlet at the bottom of the cavity of the fire grate 2, fills the cavity of the fire grate 2 and cools the fire grate 2, and then flows out from the water outlet 16 on the bottom surface of the fire grate cavity at the position of the cutting edge 20 on the upper edge of the screw pitch port, and the water outlet 16 is arranged on the bottom surface of the fire grate cavity at the highest position of the screw pitch port, so that the whole fire grate cavity can be filled with the cooling water, and a fire extinguishing effect can be achieved during coke discharging; when the garbage incinerator works, the induced draft fan is started, and gas generated by combustion can pass through the air inlet pipe 17 on the grate 2 at the bottom of the garbage combustion chamber 3 and enter the gas conveying pipeline 9 for purification treatment.
When the rotary type slag discharging device works, the fire grate 2 rotates clockwise ceaselessly and slowly, in the rotating process, ash slag with small volume is discharged along with air from the air inlet pipe 17 on the fire grate 2 and falls into the slag discharging device 11, and a coke block 15 with large volume is extruded, cut and crushed by the cutting edge 20 on the screw pitch port and the coke baffle plate 1 on the bottom wall of the combustion chamber in the ceaselessly rotating process of the fire grate 2, and then is discharged from the screw pitch port and falls into the slag discharging device 11; finally all coke blocks and ash residues can be discharged from the rotary grate, and the continuous work of the garbage gasification furnace is ensured.
Claims (4)
1. A rotary fire grate of a garbage gasification furnace is characterized in that: the fire grate is in a cavity spiral shape and is arranged on a fire grate revolving base and can rotate along with the fire grate revolving base; the pitch port of the fire grate is in an open spiral shape, and the upper edge of the pitch port is provided with a cutting edge; air inlet pipes penetrating through the fire grate cavity are uniformly arranged on the fire grate; the middle of the bottom surface of the grate cavity is provided with a water inlet, a vertical water inlet pipe is connected below the water inlet, the vertical water inlet pipe is connected with a horizontal water inlet pipe through a rotary joint, and a water outlet is arranged on the bottom surface of the grate cavity at the edge cutting edge position on the pitch port.
2. The rotary grate of a refuse gasification furnace according to claim 1, characterized in that: the cutting edge on the upper edge of the screw pitch opening is arranged above or below the screw pitch opening.
3. The rotary grate of claim 1, wherein: the spiral of the grate is a single-end spiral or a double-end spiral.
4. The rotary grate of claim 1, wherein: the upper edge and the lower edge of the pitch port are mutually overlapped by 50-100mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710263423.6A CN106918046B (en) | 2017-04-21 | 2017-04-21 | Rotary fire grate of garbage gasification furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710263423.6A CN106918046B (en) | 2017-04-21 | 2017-04-21 | Rotary fire grate of garbage gasification furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106918046A CN106918046A (en) | 2017-07-04 |
| CN106918046B true CN106918046B (en) | 2023-03-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710263423.6A Active CN106918046B (en) | 2017-04-21 | 2017-04-21 | Rotary fire grate of garbage gasification furnace |
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| CN (1) | CN106918046B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108036329A (en) * | 2017-12-25 | 2018-05-15 | 珠海市建华锅炉机械工程有限公司 | A kind of garbage burning boiler |
| CN108036326A (en) * | 2017-12-25 | 2018-05-15 | 珠海市建华锅炉机械工程有限公司 | A kind of wastes pre-processing system and its technique |
| CN108930964B (en) * | 2018-06-06 | 2019-11-15 | 上海古蓝环境工程有限公司 | A kind of refuse pyrolysis gasification furnace rotary fire grate device |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB462075A (en) * | 1935-01-19 | 1937-03-02 | Schmidt Sche Heissdampf | Improvements in and relating to rotary grates, particularly applicable to the furnaces of steam generators or the like |
| GB857734A (en) * | 1958-10-21 | 1961-01-04 | Frederick Joseph West | Improvements relating to the grates of gas producers |
| SU1673783A1 (en) * | 1988-12-26 | 1991-08-30 | Всесоюзный Заочный Политехнический Институт | Furnace to burn lump fuel |
| CN2505702Y (en) * | 2001-11-07 | 2002-08-14 | 中国科学院广州能源研究所 | Down-draft solid organic disposal gasification furnace |
| CN2620184Y (en) * | 2003-06-04 | 2004-06-09 | 上海化工设计院 | Multi-layer rotary grate for gas making furnace |
| CN104819469B (en) * | 2015-04-01 | 2018-05-01 | 上海寅意环保科技有限公司 | A kind of refuse pyrolysis gasification furnace |
| CN104913316B (en) * | 2015-06-23 | 2018-01-23 | 中国环境科学研究院 | A kind of slag-draining device of refuse pyrolysis gasification furnace |
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2017
- 2017-04-21 CN CN201710263423.6A patent/CN106918046B/en active Active
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| Publication number | Publication date |
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| CN106918046A (en) | 2017-07-04 |
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