CN105066118A - High temperature boiler gas blending combustion device of meagre coal efficient low-nitrogen combustion boiler - Google Patents
High temperature boiler gas blending combustion device of meagre coal efficient low-nitrogen combustion boiler Download PDFInfo
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- CN105066118A CN105066118A CN201510562056.0A CN201510562056A CN105066118A CN 105066118 A CN105066118 A CN 105066118A CN 201510562056 A CN201510562056 A CN 201510562056A CN 105066118 A CN105066118 A CN 105066118A
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- flue gas
- temperature flue
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Abstract
The invention discloses a high temperature boiler gas blending combustion device of a meagre coal efficient low-nitrogen combustion boiler. The high temperature boiler gas blending combustion device comprises an L-shaped high temperature boiler gas output pipe connected with a boiler high temperature flue gas pipe. The high temperature boiler gas blending combustion device is characterized in that the output end of the L-shaped high temperature boiler gas output pipe is connected to a high temperature boiler gas separator; a departure high temperature boiler gas outlet in the middle of the top wall of the high temperature boiler gas separator is connected with a boiler gas fan through a C-shaped delivery pipe; the outlet delivery pipe of the boiler gas fan is connected to a mother tube; the mother tube is respectively communicated with a layer-wise rectangular tube through a layer-wise distribution pipe; four angles inside the layer-wise rectangular tube are all provided with a departure high temperature boiler gas nozzle abutted with a primary air to pulverized coal pipe of a boiler burner. Because the high temperature boiler gas of the boiler is subjected to blending combustion, the high temperature boiler gas blending combustion device of the meagre coal efficient low-nitrogen combustion boiler improves the temperature of the primary air and reduces the oxygen content concentration of the primary air, so that high efficient combustion of the meagre coal in the boiler can be realized, the combustion efficiency of the meagre coal is improved, and meanwhile, the generation amount of nitrogen oxide can be reduced effectively.
Description
Technical field
The present invention relates to the combustion system of a kind of meager coal for boiler, particularly a kind of meager coal efficient low-NO_x burner high-temperature flue gas mingled burning installation.
Background technology
At present, school pays much attention to the social practice teaching of student, advocates student and makes a social investigation, excavate innovation subject.Meager coal is that ature of coal is commonly used in thermal power plant, in today that national environmental protection situation is very severe, for reducing nitrogen oxide, state's internal combustion Lean Coal-fired Boiler has all carried out low nitrogen burning transformation, what low nitrogen burning renovation technique adopted is that First air horizontal mipmap is vertical with Secondary Air, horizontal mipmap combustion technology, main burner region excess air coefficient is reduced to 0.8 by 1.2, burner adopts level or vertical bias combustion technology, but after transformation, low nitrogen burning correctional effect is not very desirable, and discharged nitrous oxides value is on average at 650mg/m
3, this kind high discharged nitrous oxides concentration, not only causes out of stock catalyst amount large, and ammonia spraying amount is large simultaneously, the escaping of ammonia rate is large, easily makes air preheater that the blocking of hydrogen sulfate ammonia easily occurs; Simultaneously because moving after combustion process, such that fly ash combustible material raises, boiler efficiency reduces more; In addition because of meager coal after-flame weak effect, also cause the coking of boiler-burner region and high temperature corrosion aggravation.
Known by retrieving, have not yet to see to be melted down by high-temperature flue gas and mix burning, improve wind-warm syndrome, reduce First air oxygen content, thus realize the report of the efficient low nitrogen combustion apparatus of meager coal.
Summary of the invention
A kind of being melted down by high-temperature flue gas is the object of the present invention is to provide to mix burning, improve boiler-burner First air temperature, reduce First air oxygen amount concentration simultaneously, thus realize the meager coal meager coal of efficient burning efficient low-NO_x burner high-temperature flue gas mingled burning installation in boiler.
In order to reach above object, the technical solution adopted in the present invention is: this meager coal efficient low-NO_x burner high-temperature flue gas mingled burning installation, comprise " L " shape high-temperature flue gas efferent duct be connected with high temperature flue-gas from boiler pipe, it is characterized in that: the output access high-temperature flue gas separator of described " L " shape high-temperature flue gas efferent duct; Connect stove cigarette blower fan from going out high-temperature flue gas gas vent by " C " shape carrier pipe in the middle part of the roof of described high-temperature flue gas separator, the female pipe of outlet conduit access of stove cigarette blower fan, female pipe is communicated with successively rectangular tube respectively by successively distributing pipe; Be equipped with in the bight, four, inner side of successively rectangular tube dock with the primary air inlet of boiler-burner from going out high-temperature flue gas nozzle.
The present invention is also implemented by following measure: described high-temperature flue gas separator is arranged on the upper end of support, makes the entrance of high-temperature flue gas separator aim at concordant with the outlet of " L " shape high-temperature flue gas efferent duct; Connect from going out dust storage tank at the end mouth pipe of high-temperature flue gas separator.
Described successively rectangular tube is provided with six layers, successively the mid point wire length on 4 limits of rectangular tube and the outer wall width of boiler consistent, successively each primary air inlet from going out a high-temperature flue gas nozzle respectively burner of corresponding boiler in four bights inside rectangular tube.
Described " L " shape high-temperature flue gas efferent duct is provided with high-temperature flue gas isolating door.
Described " C " shape carrier pipe is provided with from going out high-temperature flue gas tolerance adjustment doors.
Described from going out on high-temperature flue gas nozzle to be equipped with spray volume adjustment doors.
Beneficial effect of the present invention is: this meager coal efficient low-NO_x burner high-temperature flue gas mingled burning installation, burning is mixed owing to being melted down through separation by the high-temperature flue gas of boiler, so improve First air temperature, reduce First air oxygen amount concentration, realize meager coal efficient burning in boiler, improve the efficiency of combustion of meager coal, effectively reduce nitrogen oxide generation simultaneously.
Accompanying drawing explanation
Fig. 1 is Standard schematic front view of the present invention.
Fig. 2 is the schematic top plan view of structure of the present invention successively rectangular tube.
Fig. 3 is application state of the present invention assembling schematic diagram.
In figure: 1, " L " shape high-temperature flue gas efferent duct; 2, high-temperature flue gas separator; 3, " C " shape carrier pipe; 4, stove cigarette blower fan; 5, outlet conduit; 6, female pipe; 7, successively rectangular tube; 8, from going out high-temperature flue gas nozzle; 9, successively distributing pipe; 10 supports; 11, from going out dust storage tank; 12, high-temperature flue gas isolating door; 13, from going out high-temperature flue gas tolerance adjustment doors; 14, spray volume adjustment doors; 15, boiler; 16, high temperature furnace flue gas tail pipe.
Detailed description of the invention
The present invention is made with reference to Fig. 1, Fig. 2.This meager coal efficient low-NO_x burner high-temperature flue gas mingled burning installation, comprise " L " shape high-temperature flue gas efferent duct 1 be connected with high temperature flue-gas from boiler pipe, it is characterized in that: the output access high-temperature flue gas separator 2 of described " L " shape high-temperature flue gas efferent duct 1, by high-temperature flue gas separator 2 by the gas in high-temperature flue gas and dust separation; Connect stove cigarette blower fan 4 from going out high-temperature flue gas gas vent by " C " shape carrier pipe 3 in the middle part of the roof of described high-temperature flue gas separator 2, the outlet conduit 5 of stove cigarette blower fan 4 accesses female pipe 6, and female pipe 6 is communicated with successively rectangular tube 7 respectively by successively distributing pipe 9; Be equipped with in the bight, four, inner side of successively rectangular tube 7 dock with the primary air inlet of boiler-burner from going out high-temperature flue gas nozzle 8.Carry in the female pipe 6 of inflow by high-temperature flue gas separator 2 isolated high-temperature flue gas gas by the outlet conduit 5 of stove cigarette blower fan 4, by the successively distributing pipe 9 of female pipe 6, isolated high-temperature flue gas gas is sent into simultaneously in the successively rectangular tube 7 of layering installation, pass through the distribution of successively rectangular tube 7 again, from every layer four from going out in high-temperature flue gas nozzle 8 in the primary air inlet that sprays into and connect boiler-burner simultaneously, because high-temperature flue gas gas is now still more than 800 DEG C, after mixing with the low-temperature primary wind entering burner, the temperature of low-temperature primary wind can be made to be increased to 260 DEG C, oxygen amount concentration can be down to less than 16%, so can either be combustion-supporting, formation of nitrogen oxides can be reduced again, improve the efficiency of combustion of meager coal.
As improvement of the present invention: described high-temperature flue gas separator 2 is arranged on the upper end of support 10, the entrance of high-temperature flue gas separator 2 is made to aim at concordant with the outlet of " L " shape high-temperature flue gas efferent duct 1, so that install; Connect from going out dust storage tank 11 at the end mouth pipe of high-temperature flue gas separator 2, the dust separated from high-temperature flue gas separator 2 falls into from going out in dust storage tank 11 automatically by gravity.
Because the boiler body used at present is approximating square, burner is provided with six layers, establishes four for every layer, and each burner is all sent in burner hearth from the corner of boiler body.So, described successively rectangular tube 7 is provided with six layers, successively the mid point wire length on 4 limits of rectangular tube 7 and the outer wall width of boiler consistent, successively each primary air inlet from going out a high-temperature flue gas nozzle 8 respectively burner of corresponding boiler in four bights inside rectangular tube 7.
Described " L " shape high-temperature flue gas efferent duct 1 is provided with high-temperature flue gas isolating door 12, controls by high-temperature flue gas isolating door 12 air inflow flowing into high-temperature flue gas separator 2.
Described " C " shape carrier pipe 3 is provided with from going out high-temperature flue gas tolerance adjustment doors 13, by from going out high-temperature flue gas tolerance adjustment doors 13, realizes the adjustment of the exhaust gas volumn entered in stove cigarette blower fan 4.
Described from going out on high-temperature flue gas nozzle 8 to be equipped with spray volume adjustment doors 14, by the adjustment of spray volume adjustment doors 14, controlling the spray volume from going out high-temperature flue gas, controlling successively simultaneously, 4 from the ejection uniformity going out high-temperature flue gas nozzle 8.
Fig. 3 gives application state of the present invention assembling schematic diagram.With reference to Fig. 3, when using of the present invention, the input of " L " shape high-temperature flue gas efferent duct 1 is fixedly connected with the upper wall of the high temperature furnace flue gas tail pipe 16 of boiler 15, and with the inner space of high temperature cigarette offgas duct 16; Six layers of rectangular tube 7 are enclosed within successively the outside of boiler 15, and by docking from the primary air inlet going out high-temperature flue gas nozzle 8 and boiler 15 burner one by one successively, seal fixing, 800 DEG C of high-temperature flue gas that high-temperature flue gas tail pipe 16 can be flowed out, be separated by flue dust, sent in the primary air inlet of burner by stove cigarette blower fan 4.
Claims (6)
1. meager coal efficient low-NO_x burner high-temperature flue gas mingled burning installation, comprise " L " shape high-temperature flue gas efferent duct (1) be connected with high temperature flue-gas from boiler pipe, it is characterized in that: output access high-temperature flue gas separator (2) of described " L " shape high-temperature flue gas efferent duct (1); Stove cigarette blower fan (4) is connected from going out high-temperature flue gas gas vent by " C " shape carrier pipe (3) in the middle part of the roof of described high-temperature flue gas separator (2), the female pipe (6) of outlet conduit (5) access of stove cigarette blower fan (4), female pipe (6) is communicated with successively rectangular tube (7) respectively by successively distributing pipe (9); Be equipped with in the bight, four, inner side of successively rectangular tube (7) dock with the primary air inlet of boiler-burner from going out high-temperature flue gas nozzle (8).
2. meager coal according to claim 1 efficient low-NO_x burner high-temperature flue gas mingled burning installation, is characterized in that: described high-temperature flue gas separator (2) is arranged on the upper end of support (10); Connect from going out dust storage tank (11) at the end mouth pipe of high-temperature flue gas separator (2).
3. meager coal according to claim 1 efficient low-NO_x burner high-temperature flue gas mingled burning installation, it is characterized in that: described successively rectangular tube (7) is provided with six layers, successively the mid point wire length on 4 limits of rectangular tube (7) and the outer wall width of boiler consistent, successively each primary air inlet from going out high-temperature flue gas nozzle (8) respectively burner of corresponding boiler in four bights, rectangular tube (7) inner side.
4. meager coal according to claim 1 efficient low-NO_x burner high-temperature flue gas mingled burning installation, is characterized in that: described " L " shape high-temperature flue gas efferent duct (1) is provided with high-temperature flue gas isolating door (12).
5. meager coal according to claim 1 efficient low-NO_x burner high-temperature flue gas mingled burning installation, is characterized in that: described " C " shape carrier pipe (3) is provided with from going out high-temperature flue gas tolerance adjustment doors (13).
6. the efficient low-NO_x burner high-temperature flue gas of the meager coal according to claim 1 or 3 mingled burning installation, is characterized in that: described from going out on high-temperature flue gas nozzle (8) to be equipped with spray volume adjustment doors (14).
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| CN201510562056.0A CN105066118B (en) | 2015-09-07 | 2015-09-07 | The efficient low-NO_x burner high-temperature flue gas mingled burning installation of meager coal |
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| CN201510562056.0A CN105066118B (en) | 2015-09-07 | 2015-09-07 | The efficient low-NO_x burner high-temperature flue gas mingled burning installation of meager coal |
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| CN105066118A true CN105066118A (en) | 2015-11-18 |
| CN105066118B CN105066118B (en) | 2017-11-14 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101097060A (en) * | 2006-06-30 | 2008-01-02 | 中国科学院工程热物理研究所 | Coal firing method with low discharged nitrous oxides |
| CN201367419Y (en) * | 2009-03-20 | 2009-12-23 | 徐州燃控科技股份有限公司 | Pre-heated multilevel air distribution fixed bed straw gasification device |
| CN102966945A (en) * | 2012-11-02 | 2013-03-13 | 阳光凯迪新能源集团有限公司 | Method for reducing nitrogen oxide discharge of biomass circulating fluid bed boiler |
| CN203336630U (en) * | 2013-05-13 | 2013-12-11 | 烟台龙源电力技术股份有限公司 | Overall air bellow of tangentially coal-fired boiler and tangentially coal-fired boiler |
| CN204388044U (en) * | 2014-12-05 | 2015-06-10 | 苏州西热节能环保技术有限公司 | A kind of novel secondary bellows being applicable to pulverized-coal fired boiler opposed firing system |
-
2015
- 2015-09-07 CN CN201510562056.0A patent/CN105066118B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101097060A (en) * | 2006-06-30 | 2008-01-02 | 中国科学院工程热物理研究所 | Coal firing method with low discharged nitrous oxides |
| CN201367419Y (en) * | 2009-03-20 | 2009-12-23 | 徐州燃控科技股份有限公司 | Pre-heated multilevel air distribution fixed bed straw gasification device |
| CN102966945A (en) * | 2012-11-02 | 2013-03-13 | 阳光凯迪新能源集团有限公司 | Method for reducing nitrogen oxide discharge of biomass circulating fluid bed boiler |
| CN203336630U (en) * | 2013-05-13 | 2013-12-11 | 烟台龙源电力技术股份有限公司 | Overall air bellow of tangentially coal-fired boiler and tangentially coal-fired boiler |
| CN204388044U (en) * | 2014-12-05 | 2015-06-10 | 苏州西热节能环保技术有限公司 | A kind of novel secondary bellows being applicable to pulverized-coal fired boiler opposed firing system |
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Granted publication date: 20171114 Termination date: 20190907 |