CN2172404Y - Radial thick/thin spiral flow powdered coal burner - Google Patents
Radial thick/thin spiral flow powdered coal burner Download PDFInfo
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- CN2172404Y CN2172404Y CN 93244359 CN93244359U CN2172404Y CN 2172404 Y CN2172404 Y CN 2172404Y CN 93244359 CN93244359 CN 93244359 CN 93244359 U CN93244359 U CN 93244359U CN 2172404 Y CN2172404 Y CN 2172404Y
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- coal
- powdered coal
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Abstract
The utility model relates to a radial thick/thin spiral flow powdered coal burner which comprises a thick powdered coal passage of a cylindrical space, a thin powdered coal passage of an annular space, and a secondary air pipeline, wherein, the inner part of the thin powdered coal passage and the inner part of the secondary air pipeline are respectively provided with swirlers. The thick powdered coal passage is communicated with the hearth and the powdered coal thickener respectively through a nozzle and a thick powdered coal conveying pipe. The thin powdered coal passage is also communicated with the hearth and the powdered coal thickener respectively through a nozzle and a thin powdered coal conveying pipe. The utility model has the advantages of high burning efficiency of burning powdered coal, stable burning and low discharge of NO < x >, fine adaptability to poor-quality coal, air pollution reduction, and utilization rate improvement of energy resource.
Description
The utility model relates to a kind of coal burner, particularly vortex burner.
The national conditions of China are that oil production rate is few, though the output of coal is many, coal is changeable, and ature of coal is relatively poor, in power industry coal powder boiler combustion technology, the basic demand of coal dust firing are high efficiency, surely fire and hang down pollution.At first, for saving the energy, need to guarantee efficient combustion; Next is steady combustion, because the ature of coal of China's coal in power plant is relatively poor, and coal is changeable, and stable combustion problem is very outstanding, and particularly when underrun, the throwing oil of usually having to is combustion-supporting, thereby has increased cost of electricity-generating.Moreover, along with the growing interest of people, more and more stronger to the low pollution requirement of coal dust firing to environmental problem.Vortex burner occupies certain ratio at China's station boiler and other coal dust firing application, and its relies on high temperature recirculation zone as stable thermal source, make breeze airflow timely the smooth combustion of fighting.Breeze airflow is through behind the cyclone, because action of centrifugal force, coal dust is thrown near the rotating jet outer surface more, the part coal dust can not enter high temperature recirculation zone, can only be along the edge of recirculating zone and mistake does not match the CONCENTRATION DISTRIBUTION of coal dust and the Temperature Distribution of air-flow, be that coal dust is seldom in the high temperature recirculation zone, but concentrate a large amount of coal dusts near its edge the low-temperature space, be not formed with and be beneficial to the stable high temperature of big flame, area with high mercury, be unfavorable in time catching fire and flame stabilization of coal dust.When using low-volatite coal and colm, be difficult to steady combustion; Particularly for direct-firing system,, and can not carry out smooth combustion because of moisture height in wind, temperature are low; The low-load combustion-stabilizing ability, it is combustion-supporting usually to need to throw oil.Common vortex burner, primary and secondary air is mixed strong, temperature peak height, NO
XGrowing amount is big.According to investigations, its NO
XBe about 500～600PPm, bigger by about 25% than DC burner.The WR of ishikawajima-harima heavy industries co., ltd., Japan (IHI) exploitation---the PC burner (Japan Patent clear 62---233611) only solved the low-load combustion-stabilizing problem, and the operation adjusting is complicated, is not suitable for China's national situation.The rotational flow generator (U.S. Pat 4270895) of U.S. FW company exploitation has reduced NO effectively
XDischarging, but its swirl secondary air amount only accounts for 5～15% of total blast volume, is difficult to form stable recirculating zone; The air-flow (being the thick coal culm air-flow) that carries the air-flow (being the thin powdered coal air-flow) of fine breeze particle and the carry the rough coal powder particles all form with direct current enters burner hearth, relies on fine breeze particle air-flow to light rough coal powder particles air-flow, and flame holding is poor.
The purpose of this utility model is to improve at the problem that present technology exists, and a kind of simple in structure, high efficiency that can realize coal dust firing simultaneously, steady combustion, oligosaprobic radially deep or light vortex burner are provided.
The radially deep or light rotational flow coal dust burner of the utility model, comprise a thick coal culm passage 2, thin powdered coal passage 3 and a secondary air channel road 4 with annulus with annulus, cyclone 5 is installed in the annulus in secondary air channel road 4, the inlet of thick coal culm passage 2 is communicated with the thick coal culm outlet of pulverized coal concentrator 9 by carrier pipe 7, its outlet is communicated with burner hearth 1 by nozzles 12, thin powdered coal passage 3 is communicated with the thin powdered coal outlet of pulverized coal concentrator 9 by carrier pipe 10, its outlet is communicated with burner hearth 1 by nozzles 13, the inlet of pulverized coal concentrator 9 connects air channel 8 one time, the inlet of secondary air duct 4 is communicated with secondary air duct 11, its outlet is communicated with burner hearth 1, feature of the present utility model is a thick coal culm passage 2, thin powdered coal passage 3 and secondary air channel road 4 are arranged in order from inside to outside, and cyclone 6 is installed in the annulus of thin powdered coal passage 3.
The utility model compared with prior art, structure and principle thereof that its designing institute adopts had both overcome (IHI) WR-PC burner and only have been used for low-load combustion-stabilizing and regulate complicated shortcoming, had overcome the shortcoming of the rotational flow generator of FW company again.The utility model has solved the high efficiency of coal dust firing simultaneously, has surely fired and low NO
XDischarging, this high-efficiency low-pollution utilization to the peculiar colm of China has very positive effect.The solution of stable combustion problem has improved the reliability of pulverized-coal fired boiler coal adaptability and underrun, has guaranteed the security of boiler operatiopn; Low NO
XThe solution of emission problem has reduced atmosphere pollution, has guaranteed environment for human survival, and the low pollution utilization of coal is had great social significance and economic implications; Efficient combustion can improve rate of energy, has saved the energy.
Fig. 1 is the axial sectional schematic of an example of the utility model coal burner, and Fig. 2 is the axial sectional schematic of another example of the utility model coal burner.
Below in conjunction with two examples the utility model is done detailed description.
Embodiment 1:
As Fig. 1: 1 burner hearth among the figure, 2 thick coal culm passages, 3 thin powdered coal passages, 4 secondary air channel roads, 5 cyclones, 6 cyclones, 7 thick coal culm air delivery tube, 8 wind pulverized coal feed pipes, 9 inspissators, 10 thin powdered coal air delivery tube, 11 secondary air ducts, 12 and 13 is nozzles.
The utility model is achieved by following manner: the coal dust air stream of sending here from wind pulverized coal feed pipe 8 is divided into dense, the thin powdered coal air-flow that coal powder density differs greatly through inspissator 9, the thick coal culm air-flow contains the most coal dusts in the primary wind and powder air-flow, and the thin powdered coal air-flow only contains the sub-fraction coal dust in the primary wind and powder air-flow.The thick coal culm air-flow through thick coal culm air delivery tube 7 thick coal culm passages 2 and be in the burner internal layer nozzles--thick coal culm air-flow nozzles 12 enter burner hearth 1 with the form of direct current or weak eddy flow, the thin powdered coal air-flow enters burner hearth through thin powdered coal air delivery tube 10 thin powdered coal passages 3 and cyclone 6 and the thin powdered coal air-flow nozzles 13 that are in the thick coal culm air-flow nozzles outside with the form of eddy flow.Secondary wind sprays into burner hearth by overfire air port at outermost layer through secondary air duct 11, secondary air channel road and cyclone 5 backs.The thick coal culm air-flow enters high temperature recirculation zone, regulate secondary wind swirl strength, make the extended corner of the extended corner of thin powdered coal air-flow more than or equal to the thick coal culm air-flow, guarantee at the initial stage of catching fire, thin powdered coal air-flow and secondary wind are sneaked into the thick coal culm air-flow as far as possible less, and then formation high temperature, area with high mercury helps coal powder ignition and flame stabilization.Reach the burning initial stage before catching fire, radially distributing successively: thick coal culm flow area, thin powdered coal flow area, secondary wind district, in each district, the gas-powder ratio of breeze airflow can suppress NO effectively away from the stoichiometric ratio of burning
XFormation, reduce NO significantly
XDischarging.Select suitable secondary wind swirl strength, assurance thin powdered coal air-flow and secondary wind are sneaked into after the thick coal culm air-flow catches fire in good time, and coal dust firing requisite oxygen amount is in time supplied with; Simultaneously, the thick coal culm air-flow can in time be lighted the thin powdered coal air-flow.Realization is caught fire, steady combustion and timely after-flame.
In addition, deep or light two strands of total primary air ratios of breeze airflow are the stoichiometric ratio of volatile combustion, and promptly total primary air ratio is the conventional design value still, and this has guaranteed efficient combustion.Be provided with central tube in the thick coal culm passage 2, the oil gun that is provided with in the central tube, the end is a reamer.
Embodiment 2:
As shown in Figure 2,14 central tubes among the figure, 15 toroidal membranes, 16 swirl secondary air roads, 17 direct current secondary air ducts, 18 and 19 air door plate washers.
The coal dust air stream of sending here from wind pulverized coal feed pipe 8 is divided into dense, the thin powdered coal air-flow that coal powder density differs greatly through inspissator 9, and two strands of total primary air ratios of air-flow are the conventional design value.The thick coal culm air-flow enters high temperature recirculation zone through thick coal culm air delivery tube 7 thick coal culm passages 2 and thick coal culm air-flow nozzles 12 with the direct current form, be formed with the high temperature, the area with high mercury that are beneficial to steady combustion, the thin powdered coal air-flow enters burner hearth 1 through thin powdered coal air delivery tube 10, thin powdered coal passage 3, cyclone 5 and thin powdered coal air-flow nozzles 13 with the eddy flow form, forms the thin powdered coal flow area.The improvement of this example is: be provided with toroidal membrane 15 in the secondary air channel 4 passage is divided into swirl secondary air pipeline 16 and direct current secondary air channel road 17, establish cyclone 6 in the swirl secondary air pipeline 16, the inlet in swirl secondary air pipeline 16 and direct current secondary air channel road 17 is respectively equipped with the moving air door plate washer 18 and 19 of adjustable turn over, secondary wind enters burner by secondary air duct and was divided into swirl secondary air and direct current secondary wind two parts in the past, the shared share of two parts wind can be by air door baffle plate 18 and 19 flexible modulation, and they enter burner hearth 1 through swirl secondary air pipeline 16 and direct current secondary air channel road 17 respectively.Secondary wind swirl strength can be by changing the secondary air flow flexible modulation, and being provided with oil gun and end in the central tube 14 is reamer.
Claims (1)
1, a kind of radially deep or light vortex burner, comprise a thick coal culm passage [2], one has the thin powdered coal passage [3] of annulus and the secondary air channel road [4] that has annulus, cyclone [5] is installed in the annulus in secondary air channel road [4], the inlet of thick coal culm passage [2] is communicated with the thick coal culm outlet of pulverized coal concentrator [9] by carrier pipe [7], its outlet is communicated with burner hearth [1] by nozzles [12], thin powdered coal passage [3] is communicated with the thin powdered coal outlet of pulverized coal concentrator [9] by carrier pipe [10], its outlet is communicated with burner hearth [1] by nozzles [13], the inlet of pulverized coal concentrator [9] connects an air channel [8], the inlet in secondary air channel road [4] is communicated with secondary air duct [11], its outlet is communicated with burner hearth [1], the thick coal culm passage [2] that is characterised in that of the present utility model, thin powdered coal passage [3] and secondary air channel road [4] are arranged in order from inside to outside, and cyclone [6] is installed in the annulus of thin powdered coal passage [3].
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93244359 CN2172404Y (en) | 1993-11-09 | 1993-11-09 | Radial thick/thin spiral flow powdered coal burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93244359 CN2172404Y (en) | 1993-11-09 | 1993-11-09 | Radial thick/thin spiral flow powdered coal burner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2172404Y true CN2172404Y (en) | 1994-07-20 |
Family
ID=33817581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93244359 Expired - Fee Related CN2172404Y (en) | 1993-11-09 | 1993-11-09 | Radial thick/thin spiral flow powdered coal burner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2172404Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1095971C (en) * | 1996-11-12 | 2002-12-11 | 孙键 | Radial cyclone-type coal burner |
| CN100567816C (en) * | 2007-12-25 | 2009-12-09 | 杭州意能节能技术有限公司 | A kind of eddy flow powdered coal burner lit up by tiny oil with center wind |
| CN110319436A (en) * | 2019-06-15 | 2019-10-11 | 沈阳环境科学研究院 | A kind of deep or light classification vortex burner of compact |
| CN111006202A (en) * | 2018-10-08 | 2020-04-14 | 上海锅炉厂有限公司 | Cyclone combustion coupling boiler system suitable for burning strong-slagging dirt-staining solid fuel |
| CN114791106A (en) * | 2022-05-19 | 2022-07-26 | 哈尔滨工业大学 | Cyclone burner with multi-channel primary air |
-
1993
- 1993-11-09 CN CN 93244359 patent/CN2172404Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1095971C (en) * | 1996-11-12 | 2002-12-11 | 孙键 | Radial cyclone-type coal burner |
| CN100567816C (en) * | 2007-12-25 | 2009-12-09 | 杭州意能节能技术有限公司 | A kind of eddy flow powdered coal burner lit up by tiny oil with center wind |
| CN111006202A (en) * | 2018-10-08 | 2020-04-14 | 上海锅炉厂有限公司 | Cyclone combustion coupling boiler system suitable for burning strong-slagging dirt-staining solid fuel |
| CN110319436A (en) * | 2019-06-15 | 2019-10-11 | 沈阳环境科学研究院 | A kind of deep or light classification vortex burner of compact |
| CN114791106A (en) * | 2022-05-19 | 2022-07-26 | 哈尔滨工业大学 | Cyclone burner with multi-channel primary air |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |