CN102588953B - Self-circulation type pulverized coal furnace device - Google Patents
Self-circulation type pulverized coal furnace device Download PDFInfo
- Publication number
- CN102588953B CN102588953B CN201210054658.1A CN201210054658A CN102588953B CN 102588953 B CN102588953 B CN 102588953B CN 201210054658 A CN201210054658 A CN 201210054658A CN 102588953 B CN102588953 B CN 102588953B
- Authority
- CN
- China
- Prior art keywords
- coal dust
- pulverized coal
- self
- coal
- furnace
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The invention discloses a self-circulation type pulverized coal furnace device. An interlayer is arranged between an inner cavity and a shell of a pulverized coal combustion smoke producer, the front end of the inner cavity of the pulverized coal combustion smoke producer is respectively provided with natural gas burner and a pulverized coal burner, and the tail end of the pulverized coal combustion smoke producer is respectively connected with a high-temperature smoke pipeline and a self-circulation waste gas pipeline; and the natural gas burner is connected with a natural gas combustion fan, the pulverized coal burner is respectively connected with a gas and powder mixing device and a second duct, the gas and powder mixing device is respectively connected with a first duct and a variable frequency feeder, and the second duct and the first duct are both communicated with the pulverized combustion fan through the interlayer of the pulverized coal combustion smoke producer. According to the invention, pulverized coal is used as main fuel, and natural gas is used as auxiliary fuel, so that the fuel cost is reduced. Circulating air of a pulverized coal preparing system is mixed with the high-temperature smoke of the pulverized coal combustion smoke producer; and compared with an open type combustion system, the oxygen content of a smoke discharge hole of the pulverized coal combustion smoke producer is greatly reduced, so that the safety of the pulverized coal preparing system is ensured.
Description
Technical field
The present invention relates to a kind of self-circulation type pulverized coal furnace device.
Background technology
At present, pulverized coal injection in blast furnace project is accepted and adopts by domestic most iron and steel enterprises as a mature technology, and in blast furnace ironmaking process, coal dust possesses the double action of reducing agent and fuel simultaneously.
This characteristic of coal dust is also applicable to the demand of nonferrous smelting industry copper smelting-furnace to fuel and reducing agent very much, but coloured industry does not have the blast furnace process such as blast furnace gas and exhaust gas of hot-blast stove to produce the byproduct generating.Therefore, the fine coal preparation system of coloured industry need to be equipped with high-temperature flue gas generating means, high-temperature flue gas generating means need to be purchased separately a large amount of fuel such as liquefied gas, natural gas or fuel oil on market, adds hot-air by combustion fuel, and then produces the high temperature air of dry coal dust; Because existing high-temperature flue gas generating means adopts open combustion system, the oxygen content of the waste gas that coloured industry fine coal preparation system produces cannot be effectively controlled always, thereby be mostly directly discharged in atmosphere, not only contaminated air, and because the temperature of the waste gas giving off also more than degree, has caused the waste of energy at seventy or eighty.
Summary of the invention
Goal of the invention: technical problem to be solved by this invention is that the present situation for coloured industry to coal dust demand, provides a kind of self-circulation type pulverized coal furnace device that can reduce fuel cost and fine coal preparation system oxygen content.
In order to solve the problems of the technologies described above, the present invention has adopted following technical scheme:
A kind of self-circulation type pulverized coal furnace device, comprises coal dust firing fume generating furnace, and described coal dust firing fume generating furnace comprises inner chamber and shell, between inner chamber and shell, leaves interlayer; The front end of described coal dust firing fume generating furnace inner chamber is respectively equipped with natural gas combustion nozzle and coal dust burner, and the tail end of coal dust firing fume generating furnace inner chamber connects respectively high-temperature flue gas pipeline and self-loopa exhaust piping; Natural gas combustion nozzle connects natural gas combustion-supporting blower fan, coal dust burner connects respectively gas powder mixing arrangement and the second airduct, gas powder mixing arrangement connects respectively the first airduct and frequency conversion dispenser, the second airduct and the first airduct are all communicated with coal dust combustion fan by the interlayer of coal dust firing fume generating furnace, frequency conversion dispenser connects the middle warehouse of coal dust by push-pull valve device, in the middle of coal dust, warehouse is also connected with gas fluidized device, and in the middle of coal dust, warehouse connects the discharging opening of fine coal preparation system by powder feeding pipeline; The air outlet of high-temperature flue gas pipeline is communicated with the air inlet of fine coal preparation system, and the air outlet of fine coal preparation system is communicated with the air inlet of self-loopa exhaust piping.
Further, connect diffuse channel at the tail end of coal dust firing fume generating furnace, on diffuse channel, be provided with water-cooled valve; In the middle of coal dust, the top of warehouse is provided with top, storehouse sack cleaner.
Further, between natural gas combustion nozzle and natural gas combustion-supporting blower fan, be provided with the first air control valve, between the interlayer of coal dust firing fume generating furnace and coal dust combustion fan, be provided with the second air control valve.
Beneficial effect: 1) the present invention utilizes coal dust that fine coal preparation system self the was dried main fuel as coal dust firing fume generating furnace, utilizes natural gas as auxiliary fuel, has ensured the abundant burning of coal dust, has reduced fuel cost.Calculate according to the fuel medium that provides identical heat flue gas to need, the coal dust of 1kg can replace 1.64m
3natural gas, estimate every cost-saved 1.4 yuan of every burning 1kg coal dust according to the market price of coal dust and natural gas, calculate hour combusting coal fines amount 120kg, 1036.8 tons of year consumption coal dust amounts by the fine coal preparation system of output 10t/h, years cost-saving 145.2 ten thousand yuan, remarkable benefit.
2) during waste gas fine coal preparation system being given off is recovered in coal dust firing fume generating furnace again, mix with the high-temperature flue gas in coal dust firing fume generating furnace, mixed flue gas reenters fine coal preparation system again and uses, make like this high-temperature flue gas forming section flue gas closed cycle, reduce the oxygen content of flue gas, the oxygen content that enclosed smoke circulating system of the present invention is discharged into the flue gas of dry fine coal preparation system is 14%, and open burning system of discharging to be discharged into the oxygen content of the flue gas in fine coal preparation system be 18%; Thereby ensure the safety climate of fine coal preparation system.
3) owing to having recycled the part high-temperature flue gas of coal dust firing fume generating furnace discharge, reach energy-conservation object.
4) the present invention not only can be used in the fine coal preparation engineering of coloured industry, also can promote at the fine coal preparation engineering of other industry.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
Fig. 2 is the plan structure schematic diagram of Fig. 1, omits the middle warehouse of coal dust and powder feeding pipeline.
Detailed description of the invention:
Below in conjunction with accompanying drawing, the present invention is done further and explained.
As illustrated in fig. 1 and 2, self-circulation type pulverized coal furnace device of the present invention comprises coal dust firing fume generating furnace 1, and coal dust firing fume generating furnace 1 comprises inner chamber and shell, between inner chamber and shell, leaves space, forms empty interlayer (not shown in the figures meaning out).
The front end of coal dust firing fume generating furnace 1 inner chamber is respectively equipped with natural gas combustion nozzle 2 and coal dust burner 3; The tail end of coal dust firing fume generating furnace 1 inner chamber is communicated with respectively high-temperature flue gas pipeline 9, self-loopa exhaust piping 21 and diffuse channel 15, and diffuse channel 15 is provided with water-cooled valve 16.Fine coal preparation system is provided with circulating ventilation pipeline: the air outlet of high-temperature flue gas pipeline 9 is communicated with the air inlet of fine coal preparation system, and the air outlet of fine coal preparation system is communicated with the air inlet of self-loopa exhaust piping 21.
Natural gas combustion nozzle 2 connects natural gas combustion-supporting blower fan 6 by the first air control valve 18; Coal dust burner 3 connects respectively gas powder mixing arrangement 7 and the second airduct 5, gas powder mixing arrangement 7 connects respectively the first airduct 4 and frequency conversion dispenser 10, the second airduct 5 is all connected the second air control valve 19, the second air control valves 19 by the interlayer of coal dust firing fume generating furnace with the first airduct 1 and connects coal dust combustion fan 11.Frequency conversion dispenser 10 connects the middle warehouse 13 of coal dust by push-pull valve device 12, and in the middle of coal dust, warehouse 13 is also connected with gas fluidized device 8, and in the middle of coal dust, warehouse 13 connects the discharging opening of fine coal preparation system by powder feeding pipeline 14.
Bottom at coal dust firing fume generating furnace 1 also connects ash exhauster 20.
Operation principle of the present invention is:
Delivery vehicles is by powder feeding pipeline 14 by coal dust warehouse 13 in the middle of the discharging opening of fine coal preparation system is delivered to coal dust, and in the middle of coal dust, top, the storehouse sack cleaner 17 on warehouse 13 tops separates gas and gas is discharged outside storehouse with coal dust; Open natural gas combustion-supporting blower fan 6, by natural gas combustion nozzle 2 gas-firings, utilize the heat of gas-firing generation by temperature increase to the 850 DEG C left and right in coal dust firing fume generating furnace 1 inner chamber; Start coal dust combustion fan 11 and frequency conversion dispenser 10, the coal dust in the middle of coal dust in warehouse 13, after gas fluidized device 8 fluidisations, is delivered to gas powder mixing arrangement 7 through push-pull valve device 12 and frequency conversion dispenser 10; The combustion air that coal dust combustion fan 11 produces is shunted after the interlayer preheating of coal dust firing fume generating furnace 1, wherein a part of combustion air mixes with the coal dust in gas powder mixing arrangement 7 through the first airduct 4, coal dust is delivered to coal dust burner 3, another part combustion air enters coal dust burner 3 through the second airduct 5 to be mixed with coal dust, and burns in coal dust firing fume generating furnace 1.After coal dust firing is stable, strengthens frequency conversion dispenser 10 coal dust feeding coals, and close the first air control valve 18.
Coal dust firing in coal dust firing fume generating furnace 1 can produce the high-temperature flue gas of 850 DEG C to 1000 DEG C, fine coal preparation system passes into the circulated air of the interior 70 DEG C of left and right of coal dust firing fume generating furnace 1 through self-loopa exhaust piping 21 simultaneously, high-temperature flue gas mixes with circulated air at the tail end of coal dust firing fume generating furnace 1, and form the flue gas of 180 to 200 DEG C, then enter fine coal preparation system through high-temperature flue gas pipeline 9 and dry raw coal.
Due to the circulated air of fine coal preparation system is mixed with the high-temperature flue gas of coal dust firing fume generating furnace, make high-temperature flue gas forming section flue gas closed cycle, with respect to open system, the fume emission mouth oxygen content of coal dust firing fume generating furnace reduces greatly, thereby has ensured the safety climate of fine coal preparation system.
The coal dust firing fume generating furnace use cost that the present invention adopts is lower, and after the application of a period of time, advantage progressively embodies, and can greatly reduce the production cost of enterprise.It not only can be used in the fine coal preparation engineering of coloured industry, also can promote at the fine coal preparation engineering of other industry.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (6)
1. a self-circulation type pulverized coal furnace device, comprises coal dust firing fume generating furnace (1), it is characterized in that: described coal dust firing fume generating furnace (1) comprises inner chamber and shell, between inner chamber and shell, leaves interlayer, the front end of described coal dust firing fume generating furnace (1) inner chamber is respectively equipped with natural gas combustion nozzle (2) and coal dust burner (3), and the tail end of coal dust firing fume generating furnace (1) inner chamber connects respectively high-temperature flue gas pipeline (9) and self-loopa exhaust piping (21), natural gas combustion nozzle (2) connects natural gas combustion-supporting blower fan (6), coal dust burner (3) connects respectively gas powder mixing arrangement (7) and the second airduct (5), gas powder mixing arrangement (7) connects respectively the first airduct (4) and frequency conversion dispenser (10), the second airduct (5) and the first airduct (4) are all communicated with coal dust combustion fan (11) by the interlayer of coal dust firing fume generating furnace (1), frequency conversion dispenser (10) connects the middle warehouse of coal dust (13) by push-pull valve device (12), in the middle of coal dust, warehouse (13) is also connected with gas fluidized device (8), in the middle of coal dust, warehouse (13) connects the discharging opening of fine coal preparation system by powder feeding pipeline (14), the air outlet of high-temperature flue gas pipeline (9) is communicated with the air inlet of fine coal preparation system, and the air outlet of fine coal preparation system is communicated with the air inlet of self-loopa exhaust piping (21).
2. a kind of self-circulation type pulverized coal furnace device according to claim 1, is characterized in that: the tail end of described coal dust firing fume generating furnace (1) is connected with diffuse channel (15).
3. a kind of self-circulation type pulverized coal furnace device according to claim 2, is characterized in that: described diffuse channel (15) is provided with water-cooled valve (16).
4. a kind of self-circulation type pulverized coal furnace device according to claim 1, is characterized in that: in the middle of described coal dust, the top of warehouse (13) is provided with top, storehouse sack cleaner (17).
5. according to a kind of self-circulation type pulverized coal furnace device described in claim 1 or 2 or 4, it is characterized in that: between described natural gas combustion nozzle (2) and natural gas combustion-supporting blower fan (6), be provided with the first air control valve (18).
6. according to a kind of self-circulation type pulverized coal furnace device described in claim 1 or 2 or 4, it is characterized in that: between the interlayer of described coal dust firing fume generating furnace (1) and coal dust combustion fan (11), be provided with the second air control valve (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210054658.1A CN102588953B (en) | 2012-03-05 | 2012-03-05 | Self-circulation type pulverized coal furnace device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210054658.1A CN102588953B (en) | 2012-03-05 | 2012-03-05 | Self-circulation type pulverized coal furnace device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102588953A CN102588953A (en) | 2012-07-18 |
| CN102588953B true CN102588953B (en) | 2014-07-16 |
Family
ID=46477983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210054658.1A Active CN102588953B (en) | 2012-03-05 | 2012-03-05 | Self-circulation type pulverized coal furnace device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102588953B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104141950A (en) * | 2014-07-18 | 2014-11-12 | 华南理工大学 | Device and method for reducing discharging of boiler NOx in powder mode |
| CN113786921B (en) * | 2021-08-27 | 2023-02-24 | 中冶南方工程技术有限公司 | Blast furnace pulverized coal preheating system based on raw coal processing technology |
| CN114812127B (en) * | 2022-03-31 | 2024-02-23 | 江西中科新建材股份有限公司 | Mortar raw material drying equipment |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4779545A (en) * | 1988-02-24 | 1988-10-25 | Consolidated Natural Gas Service Company | Apparatus and method of reducing nitrogen oxide emissions |
| DE3519951C1 (en) * | 1985-06-04 | 1992-07-02 | Evt Energie- Und Verfahrenstechnik Gmbh, 7000 Stuttgart | Process for reducing the emission of dust, SO2 and NOx of a steam generator having a flue gas denitration plant |
| CN1069111A (en) * | 1991-07-26 | 1993-02-17 | Evt能源有限公司 | Coal powder burner |
| CN2534472Y (en) * | 2002-04-12 | 2003-02-05 | 姜政华 | Fine coal powder and natural gas two purpose burner |
| CN2685345Y (en) * | 2004-03-02 | 2005-03-16 | 河南济源钢铁(集团)有限公司 | Blast furnace coal powder injection powder making fumes circulating system |
| CN2804624Y (en) * | 2005-07-11 | 2006-08-09 | 万启科 | Coal slurry boiler burner |
| CN202501450U (en) * | 2012-03-05 | 2012-10-24 | 江苏大峘集团有限公司 | Self-circulation pulverized coal furnace device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01111106A (en) * | 1987-10-23 | 1989-04-27 | Kawasaki Heavy Ind Ltd | High-temperature combustion gas recycle type cyclone coal combustion furnace |
| US20070144415A1 (en) * | 2005-11-29 | 2007-06-28 | Varagani Rajani K | Coal Upgrading Process Utilizing Nitrogen and/or Carbon Dioxide |
-
2012
- 2012-03-05 CN CN201210054658.1A patent/CN102588953B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3519951C1 (en) * | 1985-06-04 | 1992-07-02 | Evt Energie- Und Verfahrenstechnik Gmbh, 7000 Stuttgart | Process for reducing the emission of dust, SO2 and NOx of a steam generator having a flue gas denitration plant |
| US4779545A (en) * | 1988-02-24 | 1988-10-25 | Consolidated Natural Gas Service Company | Apparatus and method of reducing nitrogen oxide emissions |
| CN1069111A (en) * | 1991-07-26 | 1993-02-17 | Evt能源有限公司 | Coal powder burner |
| CN2534472Y (en) * | 2002-04-12 | 2003-02-05 | 姜政华 | Fine coal powder and natural gas two purpose burner |
| CN2685345Y (en) * | 2004-03-02 | 2005-03-16 | 河南济源钢铁(集团)有限公司 | Blast furnace coal powder injection powder making fumes circulating system |
| CN2804624Y (en) * | 2005-07-11 | 2006-08-09 | 万启科 | Coal slurry boiler burner |
| CN202501450U (en) * | 2012-03-05 | 2012-10-24 | 江苏大峘集团有限公司 | Self-circulation pulverized coal furnace device |
Non-Patent Citations (3)
| Title |
|---|
| JP平1-111106A 1989.04.27 |
| 天然气与煤粉混烧技术在工业锅炉上的应用;姜谋等;《能源工程》;20120229(第1期);第58-62页 * |
| 姜谋等.天然气与煤粉混烧技术在工业锅炉上的应用.《能源工程》.2012,(第1期),第58-62页. |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102588953A (en) | 2012-07-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101761933B (en) | Low-temperature furnace smoke sucking exhaust gas and hot air drying composite powder feeding bituminous coal and meagre coal universal type powder preparing system | |
| CN102258923A (en) | Method for recycling and reusing tail gas of calcium carbide furnace | |
| CN102620573B (en) | Utilization method and system for tail gas of calcium carbide furnace | |
| CN102588953B (en) | Self-circulation type pulverized coal furnace device | |
| CN203771439U (en) | High-moisture lignite medium speed mill coal pulverizing system using pulverized coal combustion heating primary air | |
| CN202501450U (en) | Self-circulation pulverized coal furnace device | |
| CN116083673B (en) | Synchronous desulfurization and denitrification system for cascade utilization of flue gas of blast furnace hot blast stove | |
| CN110157845B (en) | Blast furnace mineral powder injection method and system | |
| CN203549793U (en) | Combined type chain grate furnace with pulverized coal burner | |
| CN103940080A (en) | Medium-temperature and low-oxygen-content hot blast stove based on coal dust low-oxygen combustion technology | |
| CN114657296A (en) | Multi-stage preheating injection system and method for blast furnace fuel of iron and steel enterprise | |
| CN203771438U (en) | High-moisture lignite medium speed mill coal pulverizing system using coal gas combustion heating primary air | |
| CN203810713U (en) | Medium-temperature low-oxygen-content hot blast furnace based on pulverized coal low-oxygen burning technology | |
| CN202193731U (en) | Flue gas waste heat double-circulating gas burning lime kiln | |
| CN101081349A (en) | Fire-coal hot blast desulfurizing system | |
| CN206257657U (en) | The high-temperature flue gas EGR of high temperature corrosion is prevented for PI type boilers | |
| CN105402703A (en) | Vertical chimney-free biomass gas-fired boiler | |
| CN203810879U (en) | Diffusion type coal injection burning furnace of drying machine | |
| CN204665339U (en) | A kind of novel biomass-burning Industrial Boiler energy-saving chimney arch | |
| CN103925606A (en) | High-moisture lignite medium-speed coal mill pulverizing system heating primary air through coal gas burning | |
| CN116064982B (en) | Method for recycling waste heat and residual energy of tail gas of coal injection and powder preparation of blast furnace | |
| CN103672866B (en) | A kind of iron-smelting process coal injection furnace preheat burner and method | |
| CN215571254U (en) | Ultralow smoke temperature biomass compression molding fuel hot-blast stove | |
| CN202757467U (en) | System for comprehensively utilizing waste heat of salt melting furnace for power generation and combustion | |
| CN202032601U (en) | Device used for ignite combustion of bituminous coal boiler of middle storage bin powder producing system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 211112 Tianyuan East Road, Jiangning District, Jiangsu, China, No. 368, No. Patentee after: Great Huan Group Co., Ltd Address before: 211112 Tianyuan East Road, Jiangning District, Jiangsu, China, No. 368, No. Patentee before: Jiangsu MounTop Group Co., Ltd. |