CN1086790C - Outer chamber type dual reflux coal-powder steady flame jet - Google Patents
Outer chamber type dual reflux coal-powder steady flame jet Download PDFInfo
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- CN1086790C CN1086790C CN98109150A CN98109150A CN1086790C CN 1086790 C CN1086790 C CN 1086790C CN 98109150 A CN98109150 A CN 98109150A CN 98109150 A CN98109150 A CN 98109150A CN 1086790 C CN1086790 C CN 1086790C
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The present invention relates to an outer chamber type dual reflux coal powder stable combustion flame jet which comprises a small oil gun, a high pressure igniter, a smoke temperature tube, a temperature measuring tube, a bluff body, a primary wind coal powder interface preheating tube, a secondary wind tube, a secondary wind heating cavity, a steel cover, a plurality of high-temperature secondary wind swirling blowing tube and a pre-combustion cavity in the shape of a waist drum, wherein the back end of the primary wind coal powder interface preheating tube is connected with a gas inlet of the pre-combustion cavity, and the secondary wind heating cavity is arranged outside the pre-combustion cavity and forms a secondary wind heating cavity with the pre-combustion cavity. The stable combustion flame jet is difficult to coke, can stably work for a long term, can save fuel oil and coal, and can reduce environmental pollution.
Description
The present invention relates to a kind of outer chamber type dual reflux coal-powder steady flame jet, it belongs to a kind of coal burner that is installed on the pulverized-coal fired boiler.
The burner of pulverized-coal fired boiler use now mainly contains following a few class, and the one, bluff body class burner, this class burner are used for making the deflection zig zag of wind breeze airflow, form the recirculating zone thereafter, and coal dust makes the coal dust enrichment be convenient to burning because inertia is injected this recirculating zone.Though this class burner is simple in structure, oil-saving effect is poor.Second class is deep or light powder burner, and this class burner is separated into dense, light two strands of primary mixtures with breeze airflow and is blown into respectively in the burner hearth to improve combustion position.Its shortcoming be difficult to the height of load regulate dense, light powder concentration and complex structure, oil-saving effect is poor.The 3rd class is a pre-burning cavate burner, and the shortcoming of existing this class burner is the pre-burning weak effect, and easily coking is difficult to long-term stable operation.
The purpose of this invention is to provide a kind of outer chamber type dual reflux coal-powder steady flame jet, this coal-powder steady flame burner is difficult for coking, and energy long-term stable operation and saving fuel oil and saving are coal-fired, raising coal dust after-flame degree, and minimizing is to the pollution of environment.
Task of the present invention is to adopt following technical proposals to realize: this outer chamber type dual reflux coal-powder steady flame jet comprises small oil gun, isolating high-pressure ignitor, smoke-warming tube, temperature tube and bluff body, wherein it also comprises wind coal dust interface economizer bank one time, secondary air channel, secondary wind heating cavity, steel cage, 120 high temperature secondary wind eddy flow blowpipes and dolioform pre-burning cavity, the rear end of a wind coal dust interface economizer bank is connected with the air inlet of pre-burning cavity, small oil gun is contained on the axis of a wind coal dust interface economizer bank and enters or withdraw from the pre-burning cavity, treat that the pre-burning cavity reaches a high temperature and flameholding after, withdraw from small oil gun, be provided with in the middle of the bluff body and can hold the circular hole that small oil gun enters and withdraw from and be positioned at wind coal dust interface economizer bank and the junction of pre-burning cavity, secondary wind heating cavity be contained in the outside of pre-burning cavity and with its formation secondary wind heating chamber, in secondary wind heating chamber, be provided with the rotation air channel, steel cage is located at the outside of wind coal dust interface economizer bank and secondary wind heating cavity, the front end of steel cage is connected with the front portion of a wind coal dust interface economizer bank, the rear end of steel cage is connected with the rear portion of secondary wind heating chamber body cavity wall, 120 high temperature secondary wind eddy flow blowpipes are located in the secondary wind heating chamber, its outlet is connected with the chamber wall of pre-burning cavity, inlet is connected with the chamber wall of secondary wind heating cavity, isolating high-pressure ignitor is located at the wall middle part, chamber of pre-burning cavity, smoke-warming tube is located at the wall rear portion, chamber of pre-burning cavity, temperature tube is located in the cavity of steel cage, and the cavity that secondary air channel is located at the anterior of steel cage and passes steel cage is connected with the air inlet of secondary wind heating cavity.
Above-mentioned high temperature secondary wind eddy flow blowpipe is along tangential 45 ° and turn forward 40 ° and be connected with the chamber wall of pre-burning cavity of the pre-burning chamber outer wall.
Because the present invention has adopted the coal-powder steady flame burner of said structure form, therefore compare with background technology, the present invention has following advantage: 1) save the igniting fuel oil: owing to can not rely on the direct steady-burning coal power air-flow of reflux heat in the burner hearth, so can directly heat supply in burner hearth, play the effect of oil gun when ignition of the boiler, save the igniting fuel oil; 2) save fire coal and fuel oil: when peak load regulation, play the effect of oil gun throwing oil and stablize the stove internal combustion, increase coal dust after-flame degree, save fire coal and fuel oil; 3) coal-powder steady flame burner of the present invention is difficult for coking, can long-term stable operation; 4) under boiler normal combustion operating mode, can improve coal dust after-flame degree, reduce environmental pollution to atmosphere.
The present invention is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the A-A profile among Fig. 1.
As shown in Figure 1 and Figure 2, outer chamber type dual reflux coal-powder steady flame jet of the present invention comprises small oil gun 1, isolating high-pressure ignitor 2, smoke-warming tube 3, temperature tube 4 and bluff body 6, and wherein it also comprises wind coal dust interface economizer bank 5, secondary air channel 7, secondary wind heating cavity 8,9,120 high temperature secondary wind eddy flows of steel cage blowpipe 10 and dolioform pre-burning cavity 11 one time.The rear end of a wind coal dust interface economizer bank 5 is connected with the air inlet of pre-burning cavity 11, and small oil gun 1 is contained on the axis of a wind coal dust interface economizer bank 5 and can enters or withdraw from pre-burning cavity 11.Be provided with the junction that can hold the circular hole that small oil gun enters and withdraw from and be positioned at wind coal dust interface economizer bank 5 and pre-burning cavity 11 in the middle of the bluff body 6, secondary wind heating cavity 8 be contained in the outside of pre-burning cavity 11 and with its formation secondary wind heating chamber, in secondary wind heating chamber, be provided with the rotation air channel of making, so that the chamber wall of secondary wind heating and cooling pre-burning repeatedly cavity 11 with steel plate 13.Steel cage 9 is located at the outside of wind coal dust interface economizer bank 5 and secondary wind heating cavity 8, the front end of steel cage 9 is connected with the front portion of a wind coal dust interface economizer bank 5, the rear end of steel cage 9 is connected with the rear portion of secondary wind heating cavity 8 chamber walls, and formation can be held the cavity 12 of high temperature secondary wind.120 high temperature secondary wind eddy flow blowpipes 10 are located in the secondary wind heating chamber; Its outlet is along tangential 45 ° and turn forward 40 ° and be connected with the chamber wall of pre-burning cavity 11 of pre-burning cavity 11 outer walls, and entering the mouth is connected with the chamber wall of secondary wind heating cavity 8.The isolating high-pressure ignitor 2 that is used to light the atomized fuel of small oil gun 1 ejection is located at the wall middle part, chamber of pre-burning cavity 11; Monitor that the smoke-warming tube 3 of variations in temperature in the pre-burning cavity 11 is located at the wall rear portion, chamber of pre-burning cavity 11, the temperature tube 4 of pyrometry secondary air temperature degree is located in the cavity 12 of steel cage 9.The cavity 12 that secondary air channel 7 is located at the anterior of steel cage 9 and passes steel cage 9 is connected with the air inlet of secondary wind heating cavity 8, is convenient to secondary wind and enters smoothly in the secondary wind heating chamber.
Operation principle of the present invention is: when ignition of the boiler, small oil gun enters the pre-burning cavity by operating mechanism control, and the atomization oil firing is warmed dolioform cavity, reach uniform temperature after, throw light powder and mix combustion, after stablizing, throw dense powder and mix combustion, treat that the pre-burning cavity reaches a high temperature, and behind the flameholding, withdraws from small oil gun.At this moment can lean on the combustion heat smooth combustion of coal dust in the pre-burning cavity fully.Elder generation was by the outer high temperature secondary wind preheating of pipe before a wind coal dust entered the pre-burning cavity, enter catching fire the incubation time behind the cavity with shortening, breeze airflow is when entering the pre-burning cavity, make breeze airflow in cavity, form a high coal powder density district by bluff body, catch fire and form the high-temperature region, the formation of this high-temperature region also has benefited from the center heat build-up effect of dolioform cavity, the revolving of high temperature secondary wind blown oxygenation and promoted burning, temperature very high in the cavity has shortened catching fire the incubation time of breeze airflow more, and catch fire prolonged the burning time of coal dust in the pre-burning chamber in advance, increased heat, so optimum cyclic process makes pre-burning chamber internal combustion situation highly stable.Secondary wind blows ash to the eddy flow of the cooling of pre-burning cavity wall and high temperature secondary wind makes the coal-powder steady flame burner can long-term stable operation.
Claims (2)
1, a kind of outer chamber type dual reflux coal-powder steady flame jet, it comprises small oil gun, isolating high-pressure ignitor, smoke-warming tube, temperature tube and bluff body, it is characterized in that: it also comprises wind coal dust interface economizer bank one time, secondary air channel, secondary wind heating cavity, steel cage, 120 high temperature secondary wind eddy flow blowpipes and dolioform pre-burning cavity, the rear end of a wind coal dust interface economizer bank is connected with the air inlet of pre-burning cavity, small oil gun is contained on the axis of a wind coal dust interface economizer bank and enters or withdraw from the pre-burning cavity, treat that the pre-burning cavity reaches a high temperature and flameholding after, withdraw from small oil gun, be provided with in the middle of the bluff body and can hold the circular hole that small oil gun enters and withdraw from and be positioned at wind coal dust interface economizer bank and the junction of pre-burning cavity, secondary wind heating cavity be contained in the outside of pre-burning cavity and with its formation secondary wind heating chamber, in secondary wind heating chamber, be provided with the rotation air channel, steel cage is located at the outside of wind coal dust interface economizer bank and secondary wind heating cavity, the front end of steel cage is connected with the front portion of a wind coal dust interface economizer bank, the rear end of steel cage is connected with the rear portion of secondary wind heating chamber body cavity wall, 120 high temperature secondary wind eddy flow blowpipes are located in the secondary wind heating chamber, its outlet is connected with the chamber wall of pre-burning cavity, inlet is connected with the chamber wall of secondary wind heating cavity, isolating high-pressure ignitor is located at the wall middle part, chamber of pre-burning cavity, smoke-warming tube is located at the wall rear portion, chamber of pre-burning cavity, temperature tube is located in the cavity of steel cage, and the cavity that secondary air channel is located at the anterior of steel cage and passes steel cage is connected with the air inlet of secondary wind heating cavity.
2, a kind of outer chamber type dual reflux coal-powder steady flame jet according to claim 1 is characterized in that: high temperature secondary wind eddy flow blowpipe is along tangential 45 ° and turn forward 40 ° and be connected with the chamber wall of pre-burning cavity of the pre-burning chamber outer wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98109150A CN1086790C (en) | 1998-05-30 | 1998-05-30 | Outer chamber type dual reflux coal-powder steady flame jet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98109150A CN1086790C (en) | 1998-05-30 | 1998-05-30 | Outer chamber type dual reflux coal-powder steady flame jet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1201878A CN1201878A (en) | 1998-12-16 |
| CN1086790C true CN1086790C (en) | 2002-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98109150A Expired - Fee Related CN1086790C (en) | 1998-05-30 | 1998-05-30 | Outer chamber type dual reflux coal-powder steady flame jet |
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| Country | Link |
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| CN (1) | CN1086790C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2493843Y (en) * | 2001-08-27 | 2002-05-29 | 王爱生 | Ignition burner for coal boiler |
| CN100427827C (en) * | 2006-05-23 | 2008-10-22 | 王志祥 | Internal combustion blast furnace gas special nozzle with pyramid trustum jet device |
| CN100535516C (en) * | 2008-01-28 | 2009-09-02 | 烟台龙源电力技术股份有限公司 | Micro-oil ignition cyclone pulverized coal burner suitable for lean coal and anthracite |
| CN104501145A (en) * | 2014-12-24 | 2015-04-08 | 山西蓝天环保设备有限公司 | Self-preheating and sectionalized pulverized coal combustion low-NOx combustion device and method |
| CN105841147A (en) * | 2016-06-04 | 2016-08-10 | 重庆市富燃科技有限责任公司 | Oxygen-enriched coal powder backflow premix burner |
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1998
- 1998-05-30 CN CN98109150A patent/CN1086790C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1201878A (en) | 1998-12-16 |
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