CN203099812U - Airfoil blade flow guide rich-lean pulverized coal burner - Google Patents
Airfoil blade flow guide rich-lean pulverized coal burner Download PDFInfo
- Publication number
- CN203099812U CN203099812U CN 201220618088 CN201220618088U CN203099812U CN 203099812 U CN203099812 U CN 203099812U CN 201220618088 CN201220618088 CN 201220618088 CN 201220618088 U CN201220618088 U CN 201220618088U CN 203099812 U CN203099812 U CN 203099812U
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- pulverized coal
- inspissator
- flow guide
- burner
- coal
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Abstract
The utility model relates to an airfoil blade flow guide rich-lean pulverized coal burner, which is provided with a pulverized coal concentrator, wherein the front end of the concentrator is provided with a pulverized coal spray nozzle, the back end of the concentrator is connected with a pulverized coal pipeline, and the front part of the concentrator is provided with a rich-lean flow distribution plate. The airfoil blade flow guide rich-lean pulverized coal burner is characterized in that the middle back part is provided with airfoil flow guide blades, the flow guide blades are generally in two stages to four stages and are in vertical step-shaped arrangement at the left side or the right side of a center line in the concentrator arranged behind the flow distribution plate, and pressure balance holes are formed in the edges of the front ends of the airfoil blades. The airfoil blade flow guide rich-lean pulverized coal burner is applicable to a coal-fired boiler burner and has the advantages that the structure is novel, the burning efficiency can be improved, the emission of nitric oxides is reduced, the hearth coking is prevented, and the burning stability is improved.
Description
Technical field
The utility model relates to a kind of coal-burning boiler technical field, specifically is a kind of burner that is used for coal-burning boiler, particularly a kind of band aerofoil profile guide vane, the energy-conserving and environment-protective coal burner of generation bias pulverized coal air-flow.
Background technology
China is coal production and consumption big country, and coal provides 75% of Chinese primary energy at present, and coal is still the main primary energy of China in foreseeable decades.Coal-fired thermoelectricity is that the coal electricity is the chief component of China's capacity of installed generator, accounts for about 70% of gross generation, can produce a large amount of polluters in the coal combustion, as nitrogen oxide etc.Power industry NOx discharge capacity is greater than more than 50% of national discharged nitrous oxides total amount, and it mainly stems from various coal-burning boilers.Big problem that so the discharge capacity of control NOx and the efficiency of combustion that improves have become electric power industry development to be faced; The part coal burning boiler of power station exists the burner hearth coking and the problem of unstable of catching fire simultaneously.Therefore, be badly in need of a kind of superior novel burner of performance rational in infrastructure that can comprehensively address the above problem of exploitation.
The utility model content
The purpose of this utility model is in order to solve the problems of the technologies described above, a kind of airfoil fan water conservancy diversion concentration coal burner is proposed, this burner is a foundation with coal-fired fire behaviour, realize bias combustion by the aerofoil profile guide vane is set, and pressure balance is set, have very excellent Dual-Phrase Distribution of Gas olid flow behavior and Pulverized Coal Concentration characteristic in the airfoil fan forward position, obviously improve efficiency of combustion, reduce discharged nitrous oxides, prevent the burner hearth coking, improve combustion stability.
The purpose of this utility model is achieved through the following technical solutions:
Airfoil fan water conservancy diversion concentration coal burner, be provided with inspissator, the front end of inspissator be provided with can vertical oscillation coal nozzle, the rear end is provided with the circumference joint that is connected with pulverized coal channel, front portion near nozzle in inspissator is provided with flow distribution plate, it is characterized in that: the postmedian of inspissator is provided with the aerofoil profile guide vane, this guide vane is divided into chopped-off head and secondary, chopped-off head is a monolithic, the secondary a slice that is at least, vertical stairstepping is arranged in the left side or the right side of center line in the inspissator of described flow distribution plate back, and the chopped-off head flow deflector is arranged on the inspissator porch, and secondary guide vane is close to center line successively; On the edge of airfoil fan front end, be provided with pressure compensation opening.
Aerofoil profile guide vane shade burner of the present utility model is applicable to that the 65t/h miniature boiler is to the 1000MW super critical boiler.When the primary wind and powder mixture is flowed through inspissator, by being installed in the aerofoil profile guide vane separator of inspissator inside, a wind is divided into deep or light two-phase, deep or light phase air quantity is equal substantially, and deep or light phase coal powder density can be up to 8: 2.Concentrated phase is in high temperature, high coal powder density, the high reducing atmosphere burner hearth center side of waring oneself in front of a fire, and jet expansion is provided with smooth combustion apparatus in addition, and the initial stage that is beneficial to coal dust to fight and suppresses the generation of NOx.Light phase coal dust is less relatively to be the low-temperature burning zone, control NOx discharging, and can effectively control near the oxidizing atmosphere water-cooling wall, alleviate coking, the subsequent combustion for coal dust provides sufficient oxygen amount simultaneously, improves efficiency of combustion.
The beneficial effects of the utility model:
1, when breeze airflow passes through guide vane, at the aerofoil profile guide vane back side is that bigger vortex appears in light meeting, thereby produce very big resistance, by the pressure compensation opening that is provided with, but the pressure reduction of active balance leave dual sides, thereby the vortex of effectively eliminating vacuum side of blade, the deep or light two-phase air quantity of balance is equal substantially, reach the needed dense phase pulverized coal concentration of burning, and reduce the resistance of burner.
2, this aerofoil profile guide vane shade burner, can effectively regulate position and the intensity of combustion flame at burner hearth, guarantee burning fuel-rich combustion in early stage, burning middle and later periods aftercombustion requisite oxygen amount has the efficiency of combustion of raising, reduces that nitrogen oxide generates, combustion stability is good, prevent to produce the coking good result.
Description of drawings
Fig. 1 is a side structure schematic diagram of the present utility model;
Fig. 2 is a plan structure schematic diagram of the present utility model;
Fig. 3 is the structural representation of aerofoil profile guide vane of the present utility model.
Profile of the present utility model is not subjected to the restriction of this figure, and only the profile change also belongs to protection domain of the present utility model.
The specific embodiment
Below in conjunction with drawings and Examples the utility model is further specified: embodiment: referring to accompanying drawing,
Airfoil fan water conservancy diversion concentration coal burner, be provided with inspissator 3, the front end of inspissator be provided with can vertical oscillation coal nozzle 1, the rear end is provided with the circumference joint 6 that is connected with pulverized coal channel, front portion near nozzle in inspissator is provided with flow distribution plate 2, the postmedian of inspissator is provided with the aerofoil profile guide vane, this guide vane is divided into chopped-off head 5 and secondary 4, chopped-off head is a monolithic, the secondary a slice that is at least, vertical stairstepping is arranged in the left side or the right side of center line in the inspissator of described flow distribution plate back, and the chopped-off head flow deflector is arranged on the inspissator porch, and secondary guide vane is close to center line successively; On the edge of airfoil fan front end, be provided with pressure compensation opening 41.
Present embodiment is applied to two 300MW unit boilers of certain power plant # 3, #4, changes the coal burner of its B, C, D, E, F layer correspondence into airfoil fan water conservancy diversion shade burner.Through the operation of having gone into operation of certain 3# of power plant, the 4# boiler transformed, this boiler combustion coal is a soft coal, and the NOx discharge capacity is 550～650mg/Nm3 before transforming, and the NOx discharge capacity is 160～260mg/Nm3 after transforming.
Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle, can also make some improvement and change, these improvement and change also should be considered as the protection domain of this patent.
Claims (1)
1. airfoil fan water conservancy diversion concentration coal burner, be provided with inspissator (3), the front end of inspissator be provided with can vertical oscillation coal nozzle (1), the rear end is provided with the circumference joint (6) that is connected with pulverized coal channel, front portion near nozzle in inspissator is provided with flow distribution plate (2), it is characterized in that: the postmedian of inspissator is provided with the aerofoil profile guide vane, this guide vane is divided into chopped-off head (5) and secondary (4), chopped-off head is a monolithic, the secondary a slice that is at least, vertical stairstepping is arranged in the left side or the right side of center line in the inspissator of described flow distribution plate back, and the chopped-off head flow deflector is arranged on the inspissator porch, and secondary guide vane is close to center line successively; On the edge of airfoil fan front end, be provided with pressure compensation opening (41).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220618088 CN203099812U (en) | 2012-11-21 | 2012-11-21 | Airfoil blade flow guide rich-lean pulverized coal burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220618088 CN203099812U (en) | 2012-11-21 | 2012-11-21 | Airfoil blade flow guide rich-lean pulverized coal burner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203099812U true CN203099812U (en) | 2013-07-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220618088 Expired - Fee Related CN203099812U (en) | 2012-11-21 | 2012-11-21 | Airfoil blade flow guide rich-lean pulverized coal burner |
Country Status (1)
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| CN (1) | CN203099812U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103912873A (en) * | 2014-03-28 | 2014-07-09 | 无锡华光锅炉股份有限公司 | Separate-type pulverized coal nozzle |
| CN108151014A (en) * | 2018-01-03 | 2018-06-12 | 哈尔滨工业大学 | A kind of lower resistance louver pulverized coal concentrator with triangular prism structure concentration grid |
| CN112325284A (en) * | 2020-11-03 | 2021-02-05 | 哈尔滨锅炉厂有限责任公司 | Low-load stable-combustion burner |
-
2012
- 2012-11-21 CN CN 201220618088 patent/CN203099812U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103912873A (en) * | 2014-03-28 | 2014-07-09 | 无锡华光锅炉股份有限公司 | Separate-type pulverized coal nozzle |
| CN108151014A (en) * | 2018-01-03 | 2018-06-12 | 哈尔滨工业大学 | A kind of lower resistance louver pulverized coal concentrator with triangular prism structure concentration grid |
| CN112325284A (en) * | 2020-11-03 | 2021-02-05 | 哈尔滨锅炉厂有限责任公司 | Low-load stable-combustion burner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130731 Termination date: 20191121 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |