CN102607050B - Intermediate warehousing type air powder system - Google Patents
Intermediate warehousing type air powder system Download PDFInfo
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- CN102607050B CN102607050B CN201210086503.6A CN201210086503A CN102607050B CN 102607050 B CN102607050 B CN 102607050B CN 201210086503 A CN201210086503 A CN 201210086503A CN 102607050 B CN102607050 B CN 102607050B
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- ejector
- coal dust
- powder mixer
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- 239000000843 powder Substances 0.000 title claims abstract description 140
- 238000002485 combustion reaction Methods 0.000 claims abstract description 62
- 239000003245 coal Substances 0.000 claims abstract description 45
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000002817 coal dust Substances 0.000 claims description 100
- 239000013589 supplement Substances 0.000 claims description 22
- 239000007789 gas Substances 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 2
- 230000009469 supplementation Effects 0.000 abstract 1
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 8
- 238000010586 diagram Methods 0.000 description 8
- 238000010304 firing Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- 239000008246 gaseous mixture Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000011218 segmentation Effects 0.000 description 2
- 238000013316 zoning Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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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 invention discloses an intermediate warehousing type air powder system, which comprises a high-pressure air pump and an air powder mixer. A pulverized coal bin is connected with a feed inlet of the air powder mixer by a pulverized coal feeding machine, an outlet of the high-pressure air pump is connected with an air inlet of the air powder mixer, an air outlet of the air powder mixer is connected with a combustor of a combustion furnace, a pneumatic air ejector is further disposed between the high-pressure air pump and the combustor, pulverized coal is conveyed to the air powder mixer via the pulverized coal feeding machine, the high-pressure air pump delivers air to the air powder mixer, the pulverized coal is sucked and mixed in the air powder mixer to form primary air, and air required for sufficiently combusting the pulverized coal is supplemented by the pneumatic air ejector. The powder is conveyed by the high-pressure air pump, a certain quantity of air is sucked from the atmosphere or other air systems, multi-stage air supplementation required by the combustor is realized, the air required for sufficiently combusting the pulverized coal is supplied, and stable, high-efficiency and low-nitrogen pulverized coal combustion with a high burn-off rate and suppressed nitrogen oxide is realized.
Description
Technical field
The present invention relates to a kind of pulverized coal combustion system, be specifically related to a kind of middle warehouse formula wind powder system.
Background technology
Pulverized coal combustion, because efficiency of combustion is high, is conducive to realize automation and controls, and is convenient to the reasons such as control of pollutant emission, is widely used in generating plant pulverized coal boiler, industrial coal powder boiler and rotary kiln.
The wind powder system that pulverized coal combustion adopts has two kinds of middle warehouse formula and direct-firing systems, and middle warehouse formula wind powder system is that raw coal is worn into after coal dust, is put in Pulverized Coal Bin in order to using; Direct-firing wind powder system is that raw coal is worn into coal dust in coal pulverizer, directly blows to coal powder burner and burns.
The nucleus equipment of pulverized coal combustion is coal powder burner, in order to organize coal dust and airborne oxygen to burn, in the combustion process of coal dust in boiler, a certain amount of coal dust firing needs corresponding air capacity, and air capacity is generally that segmentation is carried, and is called for short air stage feeding, thereby assurance efficiency of combustion, control and reduce the generation of nitrogen oxide, air stage feeding can be a part of at burner, and a part is in combustion chamber.
Wind powder system is used to coal powder burner and coal dust firing thereof that desired coal dust and air are provided.
The following three kinds of modes of the general employing of warehouse formula wind powder system in the middle of existing:
Mode one:
As shown in Figure 1, coal dust is delivered to air and powder mixer 2 from Pulverized Coal Bin through coal dust batcher; Primary air fan 1 is air and powder mixer 2 air-supply, coal dust aspirate and is mixed into have certain wind powder than a wind of (be air and wherein the mass ratio of coal dust), directly delivers to burner 3, in order to organize coal dust and air to burn.
The advantage of the middle warehouse formula wind powder system of this structure is: primary air fan 1 is centrifugal blower, and air quantity can meet the needs of coal dust firing, simple in structure; Shortcoming is: wind powder ratio is had to requirement, and when boiler load is adjusted, powder-feeding amount and blower fan are exerted oneself and will synchronously be adjusted; Meanwhile, limit by fan pressure head and changes in flow rate relation, air is when the air and powder mixer 2, and suction force is not enough sometimes, causes under coal dust powder not smooth, stops up etc.
Mode two:
As shown in Figure 2, coal dust is delivered to air and powder mixer 2 from Pulverized Coal Bin through coal dust batcher; Primary air fan 1 is air and powder mixer 2 air-supplies, coal dust is aspirated and is mixed into one time to wind, delivers to burner 3; Meanwhile, overfire air fan 4 to burner 3 feeding secondary wind, fully burns coal dust and air by volume adjusting apparatus 5; Burner 3 is multicenter combustor, and wind and Secondary Air enter respectively the different passages of burner 3.
The feature of the middle warehouse formula wind powder system of this structure is: primary air fan 1 is high-pressure pump, and total head is far longer than centrifugal blower, adopts concentrated phase Pneumatic Conveying Technology simultaneously, can guarantee that coal dust course of conveying is smooth, avoids pipeline accumulated powder; But, because primary air flow is not enough, need to supplement air (Secondary Air) by overfire air fan 4, volume adjusting apparatus 5 is for adjusting the air quantity of Secondary Air.
Mode three:
As shown in Figure 3, coal dust is delivered to air and powder mixer 2 from Pulverized Coal Bin through coal dust batcher; Primary air fan 1 is air and powder mixer 2 air-supplies, coal dust is aspirated and is mixed into one time to wind, delivers to burner 3; Meanwhile, overfire air fan 4 provides Secondary Air by volume adjusting apparatus 5, and Secondary Air, after the heating of air preheater, is delivered to burner, and coal dust and air are fully burnt; Burner 3 is multicenter combustor, and wind and Secondary Air enter respectively the different passages of burner 3.
The feature of the middle warehouse formula wind powder system of this structure is: primary air fan 1 is high-pressure pump, and total head is far longer than centrifugal blower, adopts concentrated phase Pneumatic Conveying Technology simultaneously, can guarantee that coal dust course of conveying is smooth, avoids pipeline accumulated powder; But, because primary air flow is not enough, need to supplement air (Secondary Air) by overfire air fan 4, volume adjusting apparatus 5 is adjusted the air quantity of Secondary Air; Secondary Air is before entering burner 3, and the heating through air preheater, becomes hot Secondary Air, can be conducive to the burning of burner 3 and the recovery of fume afterheat.
In sum, there is following shortcoming in prior art:
Mode one: wind powder ratio is had to requirement, and when boiler load is adjusted, powder-feeding amount and blower fan are exerted oneself and will synchronously be adjusted; Meanwhile, limit by fan pressure head and changes in flow rate relation, air is when the air and powder mixer, and suction force is not enough sometimes, causes under coal dust that powder is smooth, obstruction etc.
Mode two and mode three: need to increase overfire air fan, system complex, is inconvenient to increase the progression of air stage feeding, is not easy to the air quantity adjustment of air stage feeding.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of middle warehouse formula wind powder system, and it can guarantee that powder feeding is unimpeded, improves efficiency of combustion, is conducive to reduce the generation of nitrogen oxide in process of coal combustion.
For solving the problems of the technologies described above, in the middle of the present invention, the technical solution of warehouse formula wind powder system is:
Comprise high-pressure pump, air and powder mixer, Pulverized Coal Bin connects the charging aperture of air and powder mixer by coal dust batcher; High pressure gas delivery side of pump connects the air inlet of air and powder mixer, and the air outlet of air and powder mixer connects the burner of combustion furnace; Between high-pressure pump and burner, be also provided with pneumatic air ejector; Coal dust is delivered to air and powder mixer from Pulverized Coal Bin through coal dust batcher; High-pressure pump is air and powder mixer air-supply, and coal dust is aspirated and in air and powder mixer, be mixed into one time wind; Pneumatic air ejector supplements the coal dust required air quantity that fully burns.
Further, described air and powder mixer is connected with pneumatic air ejector; The air outlet of air and powder mixer connects the entrance of pneumatic air ejector, and the outlet of pneumatic air ejector connects described burner; Pneumatic air ejector is provided with the first volume adjusting apparatus; Air and powder mixer is delivered to pneumatic air ejector by a wind, it is power that pneumatic air ejector be take this wind, suction is from the air of atmosphere, in order to supplement the coal dust required air quantity that fully burns, and wind and supplementary air quantity are mixed, form a new wind, directly deliver to burner, in order to organize coal dust and air fully to burn.
Further, described the first volume adjusting apparatus connects air preheater; Air preheater is arranged at the exhanst gas outlet of combustion furnace; Described pneumatic air ejector suction is through the air from atmosphere of air preheater heating, in order to supplement the coal dust required air quantity that fully burns, and wind and supplementary air quantity are mixed, form a new wind, directly deliver to burner, in order to organize coal dust and air fully to burn.
Or described air and powder mixer is in parallel with pneumatic air ejector; The entrance of pneumatic air ejector connects high-pressure pump, and the outlet of pneumatic air ejector connects burner by the second volume adjusting apparatus; Pneumatic air ejector is provided with the first volume adjusting apparatus; Burner is multicenter combustor, from wind of air and powder mixer with from the Secondary Air of pneumatic air ejector, enters respectively the different passages in burner; Air and powder mixer is delivered to burner by a wind; Pneumatic air ejector utilization is simultaneously power from the high-pressure blast of high-pressure pump, suction from the air of atmosphere as Secondary Air, in order to supplement the coal dust required air capacity of fully burning, by the first volume adjusting apparatus, regulate supplementary secondary air flow, coal dust and air are fully burnt.
Further, described the first volume adjusting apparatus connects air preheater; Air preheater is arranged at the exhanst gas outlet of combustion furnace; The air from atmosphere that described pneumatic air ejector suction is heated through air preheater is as Secondary Air, in order to supplement the coal dust required air quantity that fully burns, by the first volume adjusting apparatus, regulate supplementary secondary air flow, coal dust and air are fully burnt.
Further, described high pressure gas delivery side of pump connects one or more air stage feeding branch roads simultaneously; Described air stage feeding branch road comprises the second pneumatic air ejector, and high pressure gas delivery side of pump connects the entrance of the second pneumatic air ejector, and the outlet of the second pneumatic air ejector connects the combustion chamber of combustion furnace by the 4th volume adjusting apparatus; The second pneumatic air ejector is provided with the 3rd volume adjusting apparatus; Described the second pneumatic air ejector utilization is power from the high-pressure blast of high-pressure pump, the direct air from atmosphere of suction, send into combustion chamber and carry out coal dust sectional combustion, in order to supplement the coal dust required air capacity of fully burning, reduce the generation of nitrogen oxide in combustion process.
Further, described the 3rd volume adjusting apparatus connects air preheater; Described the second pneumatic air ejector suction is through the air from atmosphere of air preheater heating.
The technique effect that the present invention can reach is:
The present invention adopts high-pressure pump powder feeding, because high pressure gas pump head is higher, the high speed winds producing by high-pressure pump, can in custom-designed device (being pneumatic air ejector), form negative pressure, from atmosphere or other wind systems, suck certain air quantity, form the needed multistage benefit wind of burner, meet the coal dust needed air capacity of fully burning, thereby realize stablizing, high burn-off rate, suppress efficient, the low nitrogen coal dust firing that nitrogen oxide is generated as object.
Pneumatic air ejector of the present invention utilizes high-pressure pump source of the gas, and suction atmosphere or other wind regime can form the required multistage of coal dust firing and mend wind.
The present invention by high-pressure pump powder feeding, has concurrently and mends wind function, can realize reliably, powder feeding is to coal powder burner glibly.
The present invention is simple and reliable for structure, reduces investment outlay and place, and the air quantity of air zoning is easy to adjust, is conducive to fully burning and reduces discharged nitrous oxides.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation:
Fig. 1 is the schematic diagram of warehouse formula wind powder system in the middle of prior art;
Fig. 2 is the schematic diagram of another kind of prior art;
Fig. 3 is the schematic diagram of the third prior art;
Fig. 4 is the schematic diagram of the first embodiment of warehouse formula wind powder system in the middle of the present invention;
Fig. 5 is the schematic diagram of the second embodiment of warehouse formula wind powder system in the middle of the present invention;
Fig. 6 is the schematic diagram of the 3rd embodiment of warehouse formula wind powder system in the middle of the present invention;
Fig. 7 is the schematic diagram of the 4th embodiment of warehouse formula wind powder system in the middle of the present invention;
Fig. 8 is the 5th schematic diagram to the 8th embodiment of warehouse formula wind powder system in the middle of the present invention.
Description of reference numerals in figure:
1 is primary air fan, and 2 is air and powder mixer,
3 is burner, and 4 is overfire air fan,
5 is volume adjusting apparatus,
21 is high-pressure pump, and 24 is pneumatic air ejector,
25 is the first volume adjusting apparatus, and 26 is the second volume adjusting apparatus,
27 is the second pneumatic air ejector, and 28 is the 3rd volume adjusting apparatus,
29 is the 4th volume adjusting apparatus.
The specific embodiment
The first embodiment that is illustrated in figure 4 the middle warehouse formula of the present invention wind powder system, comprises high-pressure pump 21, air and powder mixer 2, and Pulverized Coal Bin connects the charging aperture of air and powder mixer 2 by coal dust batcher; The outlet of high-pressure pump 21 connects the air inlet of air and powder mixer 2, and the air outlet of air and powder mixer 2 connects the entrance of pneumatic air ejector 24, and the outlet of pneumatic air ejector 24 connects the burner 3 of combustion furnace; Pneumatic air ejector 24 is provided with the first volume adjusting apparatus 25;
Coal dust is delivered to air and powder mixer 2 from Pulverized Coal Bin through coal dust batcher; High-pressure pump 21 is air and powder mixer 2 air-supplies, coal dust is aspirated and is mixed into a wind (being high-pressure blast powder gaseous mixture fixed double phase flow); One time wind enters pneumatic air ejector 24, and it is power that pneumatic air ejector 24 be take this wind, and suction is from the air of atmosphere, in order to supplement the coal dust required air quantity that fully burns; Supplementary air quantity can regulate by the first volume adjusting apparatus 25;
The second embodiment that is illustrated in figure 5 the middle warehouse formula of the present invention wind powder system, comprises high-pressure pump 21, air and powder mixer 2, and Pulverized Coal Bin connects the charging aperture of air and powder mixer 2 by coal dust batcher; The outlet of high-pressure pump 21 connects the air inlet of air and powder mixer 2, and the air outlet of air and powder mixer 2 connects the entrance of pneumatic air ejector 24, and the outlet of pneumatic air ejector 24 connects the burner 3 of combustion furnace; Pneumatic air ejector 24 is provided with the first volume adjusting apparatus 25, the first volume adjusting apparatus 25 and connects air preheater; Air preheater is arranged at the exhanst gas outlet of combustion furnace;
Coal dust is delivered to air and powder mixer 2 from Pulverized Coal Bin through coal dust batcher; High-pressure pump 21 is air and powder mixer 2 air-supplies, coal dust is aspirated and is mixed into a wind (being high-pressure blast powder gaseous mixture fixed double phase flow); One time wind enters pneumatic air ejector 24, and it is power that pneumatic air ejector 24 be take this wind, and suction is through the air from atmosphere of air preheater heating, in order to supplement the coal dust required air quantity that fully burns; Supplementary air quantity can regulate by the first volume adjusting apparatus 25;
Air preheater can improve the temperature of Secondary Air, is conducive to the burning of burner, and recovery section flue gas heat, improves combustion furnace efficiency.
The 3rd embodiment that is illustrated in figure 6 the middle warehouse formula of the present invention wind powder system, comprises high-pressure pump 21, air and powder mixer 2, and Pulverized Coal Bin connects the charging aperture of air and powder mixer 2 by coal dust batcher; The outlet of high-pressure pump 21 connects the air inlet of air and powder mixer 2, and the air outlet of air and powder mixer 2 connects the burner 3 of combustion furnace;
Air and powder mixer 2 is in parallel with pneumatic air ejector 24, and the entrance of pneumatic air ejector 24 connects high-pressure pump 21, and the outlet of pneumatic air ejector 24 connects burner 3 by the second volume adjusting apparatus 26; Pneumatic air ejector 24 is provided with the first volume adjusting apparatus 25; Burner 3 is multicenter combustor, from wind of air and powder mixer 2 with from the Secondary Air of pneumatic air ejector 24, enters respectively the different passages in burner 3.
Coal dust is delivered to air and powder mixer 2 from Pulverized Coal Bin through coal dust batcher; High-pressure pump 21 is air and powder mixer 2 air-supplies, coal dust is aspirated and is mixed into one time to wind, and a wind is delivered to burner 3; Meanwhile, it is power that pneumatic air ejector 24 utilizes the high-pressure blast from high-pressure pump 21, suction from the air of atmosphere as Secondary Air, in order to supplement the coal dust required air capacity of fully burning, supplementary secondary air flow can regulate by the first volume adjusting apparatus 25, and coal dust and air are fully burnt.The present embodiment can solve the problem of coal burner air stage feeding.
The 4th embodiment that is illustrated in figure 7 the middle warehouse formula of the present invention wind powder system, comprises high-pressure pump 21, air and powder mixer 2, and Pulverized Coal Bin connects the charging aperture of air and powder mixer 2 by coal dust batcher; The outlet of high-pressure pump 21 connects the air inlet of air and powder mixer 2, and the air outlet of air and powder mixer 2 connects the burner 3 of combustion furnace;
Air and powder mixer 2 is in parallel with pneumatic air ejector 24, and the entrance of pneumatic air ejector 24 connects high-pressure pump 21, and the outlet of pneumatic air ejector 24 connects burner 3 by the second volume adjusting apparatus 26; Pneumatic air ejector 24 is provided with the first volume adjusting apparatus 25, the first volume adjusting apparatus 25 and connects air preheater; Air preheater is arranged at the exhanst gas outlet of combustion furnace;
Coal dust is delivered to air and powder mixer 2 from Pulverized Coal Bin through coal dust batcher; High-pressure pump 21 is air and powder mixer 2 air-supplies, coal dust is aspirated and is mixed into one time to wind, and a wind is delivered to burner 3; Meanwhile, it is power that pneumatic air ejector 24 utilizes the high-pressure blast from high-pressure pump 21, the air from atmosphere that suction is heated by air preheater is as Secondary Air, in order to supplement the coal dust required air capacity of fully burning, supplementary secondary air flow can regulate by the first volume adjusting apparatus 25, and coal dust and air are fully burnt.
Air preheater can improve the temperature of Secondary Air, is conducive to the burning of coal burner, and recovery section flue gas heat, improves efficiency of combustion.
The present embodiment can solve the problem of coal burner air stage feeding and flue gas waste heat recovery.
As shown in Figure 8, when the original system in figure is the first embodiment, the 5th embodiment for warehouse formula wind powder system in the middle of the present invention, comprises high-pressure pump 21, air and powder mixer 2, and Pulverized Coal Bin connects the charging aperture of air and powder mixer 2 by coal dust batcher; The outlet of high-pressure pump 21 connects the air inlet of air and powder mixer 2, and the air outlet of air and powder mixer 2 connects the entrance of pneumatic air ejector 24, and the outlet of pneumatic air ejector 24 connects the burner 3 of combustion furnace; Pneumatic air ejector 24 is provided with the first volume adjusting apparatus 25;
The outlet of high-pressure pump 21 connects one or more air stage feeding branch roads simultaneously;
As shown in Figure 8, air stage feeding branch road comprises the second pneumatic air ejector 27, and the outlet of high-pressure pump 21 connects the entrance of the second pneumatic air ejector 27, and the outlet of the second pneumatic air ejector 27 connects the combustion chamber of combustion furnace by the 4th volume adjusting apparatus 29; The second pneumatic air ejector 27 is provided with the 3rd volume adjusting apparatus 28;
The 3rd volume adjusting apparatus 28 can connect air preheater, as the sixth embodiment of the present invention; Air preheater is arranged at the exhanst gas outlet of combustion furnace.
Coal dust is delivered to air and powder mixer 2 from Pulverized Coal Bin through coal dust batcher; High-pressure pump 21 is air and powder mixer 2 air-supplies, coal dust is aspirated and is mixed into a wind (being high-pressure blast powder gaseous mixture fixed double phase flow); One time wind enters pneumatic air ejector 24, and it is power that pneumatic air ejector 24 be take this wind, and suction is from the air of atmosphere, in order to supplement the coal dust required air quantity that fully burns; Supplementary air quantity can regulate by the first volume adjusting apparatus 25; Pneumatic air ejector 24 mixes wind and supplementary air quantity, forms a new wind with the required wind powder ratio of combustion furnace, directly delivers to burner 3, in order to organize coal dust and air to burn;
Meanwhile, it is power that the second pneumatic air ejector 27 utilizes the high-pressure blast from high-pressure pump 21, the direct air from atmosphere of suction, or the air from atmosphere heating by air preheater, send into the combustion chamber of combustion furnace and carry out coal dust sectional combustion, in order to supplement the coal dust required air capacity of fully burning, reduce the generation of nitrogen oxide in combustion process, supplementary air quantity can regulate by the 3rd volume adjusting apparatus 28.
As shown in Figure 8, when the original system in figure is the 3rd embodiment, the 7th embodiment for warehouse formula wind powder system in the middle of the present invention, comprises high-pressure pump 21, air and powder mixer 2, and Pulverized Coal Bin connects the charging aperture of air and powder mixer 2 by coal dust batcher; The outlet of high-pressure pump 21 connects the air inlet of air and powder mixer 2, and the air outlet of air and powder mixer 2 connects the burner 3 of combustion furnace;
Air and powder mixer 2 is in parallel with pneumatic air ejector 24, and the entrance of pneumatic air ejector 24 connects high-pressure pump 21, and the outlet of pneumatic air ejector 24 connects burner 3 by the second volume adjusting apparatus 26; Pneumatic air ejector 24 is provided with the first volume adjusting apparatus 25; Burner 3 is multicenter combustor, from wind of air and powder mixer 2 with from the Secondary Air of pneumatic air ejector 24, enters respectively the different passages in burner 3;
The outlet of high-pressure pump 21 connects one or more air stage feeding branch roads simultaneously;
As shown in Figure 8, air stage feeding branch road comprises the second pneumatic air ejector 27, and the outlet of high-pressure pump 21 connects the entrance of the second pneumatic air ejector 27, and the outlet of the second pneumatic air ejector 27 connects the combustion chamber of combustion furnace by the 4th volume adjusting apparatus 29; The second pneumatic air ejector 27 is provided with the 3rd volume adjusting apparatus 28;
The 3rd volume adjusting apparatus 28 can connect air preheater, as the eighth embodiment of the present invention; Air preheater is arranged at the exhanst gas outlet of combustion furnace.
Coal dust is delivered to air and powder mixer 2 from Pulverized Coal Bin through coal dust batcher; High-pressure pump 21 is air and powder mixer 2 air-supplies, coal dust is aspirated and is mixed into one time to wind, and a wind is delivered to burner 3; Simultaneously, it is power that pneumatic air ejector 24 utilizes the high-pressure blast from high-pressure pump 21, the direct air from atmosphere of suction, or the air from atmosphere heating by air preheater is as Secondary Air, in order to supplement the coal dust required air capacity of fully burning, supplementary secondary air flow can regulate by the first volume adjusting apparatus 25, and coal dust and air are fully burnt;
Meanwhile, it is power that the second pneumatic air ejector 27 utilizes the high-pressure blast from high-pressure pump 21, the direct air from atmosphere of suction, or the air from atmosphere heating by air preheater, send into the combustion chamber of combustion furnace and carry out coal dust sectional combustion, in order to supplement the coal dust required air capacity of fully burning, reduce the generation of nitrogen oxide in combustion process, supplementary air quantity can regulate by the 3rd volume adjusting apparatus 28.
In embodiments of the invention five to embodiment eight, coal dust is in combustion process, by segmentation, send into air, can realize coal dust burns stage by stage, except carry out sectional combustion in burner 3, also in the combustion chamber of combustion furnace, carry out sectional combustion, thereby can reduce the generation of nitrogen oxide, reduce and pollute.
When the outlet of high-pressure pump 21 connects a plurality of air stage feeding branch road simultaneously, (increase the quantity of pneumatic air ejector 27), a plurality of air stage feeding branch roads are parallel with one another, can increase to the number of times of combustion chamber air zoning.
Claims (5)
1. a warehouse formula wind powder system in the middle of, is characterized in that: comprise high-pressure pump, air and powder mixer, Pulverized Coal Bin connects the charging aperture of air and powder mixer by coal dust batcher; High-pressure pump connects air and powder mixer, and air and powder mixer connects the burner of combustion furnace; Between high-pressure pump and burner, be also provided with pneumatic air ejector;
Coal dust is delivered to air and powder mixer from Pulverized Coal Bin through coal dust batcher; High-pressure pump is air and powder mixer air-supply, and coal dust is aspirated and in air and powder mixer, be mixed into one time wind; Pneumatic air ejector supplements the coal dust required air quantity that fully burns;
Described air and powder mixer is connected with pneumatic air ejector; The air outlet of air and powder mixer connects the entrance of pneumatic air ejector, and the outlet of pneumatic air ejector connects described burner; Pneumatic air ejector is provided with the first volume adjusting apparatus; Air and powder mixer is delivered to pneumatic air ejector by a wind, it is power that pneumatic air ejector be take this wind, suction is from the air of atmosphere, in order to supplement the coal dust required air quantity that fully burns, and wind and supplementary air quantity are mixed, form a new wind, directly deliver to burner, in order to organize coal dust and air fully to burn;
Or described air and powder mixer is in parallel with pneumatic air ejector; The entrance of pneumatic air ejector connects high-pressure pump, and the outlet of pneumatic air ejector connects burner by the second volume adjusting apparatus; Pneumatic air ejector is provided with the first volume adjusting apparatus; Burner is multicenter combustor, from wind of air and powder mixer with from the Secondary Air of pneumatic air ejector, enters respectively the different passages in burner; Air and powder mixer is delivered to burner by a wind; Pneumatic air ejector utilization is simultaneously power from the high-pressure blast of high-pressure pump, suction from the air of atmosphere as Secondary Air, in order to supplement the coal dust required air capacity of fully burning, by the first volume adjusting apparatus, regulate supplementary secondary air flow, coal dust and air are fully burnt.
2. middle warehouse formula wind powder system according to claim 1, is characterized in that: when air and powder mixer is connected with pneumatic air ejector, described the first volume adjusting apparatus connects air preheater; Air preheater is arranged at the exhanst gas outlet of combustion furnace;
Described pneumatic air ejector suction is through the air from atmosphere of air preheater heating, in order to supplement the coal dust required air quantity that fully burns, and wind and supplementary air quantity are mixed, form a new wind, directly deliver to burner, in order to organize coal dust and air fully to burn.
3. middle warehouse formula wind powder system according to claim 1, is characterized in that: when air and powder mixer is in parallel with pneumatic air ejector, described the first volume adjusting apparatus connects air preheater; Air preheater is arranged at the exhanst gas outlet of combustion furnace;
Described pneumatic air ejector suction is through the air from atmosphere of air preheater heating, in order to supplement the coal dust required air quantity that fully burns, by the first volume adjusting apparatus, regulates supplementary secondary air flow, and coal dust and air are fully burnt.
4. middle warehouse formula wind powder system according to claim 1, is characterized in that: described high pressure gas delivery side of pump connects one or more air stage feeding branch roads simultaneously;
Described air stage feeding branch road comprises the second pneumatic air ejector, and high pressure gas delivery side of pump connects the entrance of the second pneumatic air ejector, and the outlet of the second pneumatic air ejector connects the combustion chamber of combustion furnace by the 4th volume adjusting apparatus; The second pneumatic air ejector is provided with the 3rd volume adjusting apparatus;
Described the second pneumatic air ejector utilization is power from the high-pressure blast of high-pressure pump, the direct air from atmosphere of suction, send into the combustion chamber of combustion furnace and carry out coal dust sectional combustion, in order to supplement the coal dust required air capacity of fully burning, reduce the generation of nitrogen oxide in combustion process.
5. middle warehouse formula wind powder system according to claim 4, is characterized in that: described the 3rd volume adjusting apparatus connects air preheater; Described the second pneumatic air ejector suction is through the air from atmosphere of air preheater heating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210086503.6A CN102607050B (en) | 2012-03-28 | 2012-03-28 | Intermediate warehousing type air powder system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210086503.6A CN102607050B (en) | 2012-03-28 | 2012-03-28 | Intermediate warehousing type air powder system |
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| Publication Number | Publication Date |
|---|---|
| CN102607050A CN102607050A (en) | 2012-07-25 |
| CN102607050B true CN102607050B (en) | 2014-02-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210086503.6A Expired - Fee Related CN102607050B (en) | 2012-03-28 | 2012-03-28 | Intermediate warehousing type air powder system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103672947A (en) * | 2012-09-06 | 2014-03-26 | 中国石油化工股份有限公司 | Dense-phase powder feeding and burning system for boiler |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4002372A (en) * | 1975-12-01 | 1977-01-11 | General Shale Products Corporation | Pulverulent material metering and delivery system and method |
| US4669398A (en) * | 1980-04-22 | 1987-06-02 | Mitsubishi Jukogyo Kabushiki Kaisha | Pulverized fuel firing apparatus |
| CN2231761Y (en) * | 1995-07-26 | 1996-07-24 | 大庆纽斯达采油工具公司 | High-speed gas burner |
| CN2301609Y (en) * | 1997-05-30 | 1998-12-23 | 西安中慧热工技术有限责任公司 | Jet gas burner |
| JP2003083685A (en) * | 2001-09-10 | 2003-03-19 | Nkk Corp | Drying system for pulverized matter and system for injection into furnace |
| CN201000057Y (en) * | 2007-01-09 | 2008-01-02 | 北京科技大学 | Small-sized coal fines combustion boiler set |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10290941A (en) * | 1997-04-18 | 1998-11-04 | Ishikawajima Harima Heavy Ind Co Ltd | Method of suppressing coal from falling to pyrite hopper of mill in coal fired boiler equipment |
-
2012
- 2012-03-28 CN CN201210086503.6A patent/CN102607050B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4002372A (en) * | 1975-12-01 | 1977-01-11 | General Shale Products Corporation | Pulverulent material metering and delivery system and method |
| US4669398A (en) * | 1980-04-22 | 1987-06-02 | Mitsubishi Jukogyo Kabushiki Kaisha | Pulverized fuel firing apparatus |
| CN2231761Y (en) * | 1995-07-26 | 1996-07-24 | 大庆纽斯达采油工具公司 | High-speed gas burner |
| CN2301609Y (en) * | 1997-05-30 | 1998-12-23 | 西安中慧热工技术有限责任公司 | Jet gas burner |
| JP2003083685A (en) * | 2001-09-10 | 2003-03-19 | Nkk Corp | Drying system for pulverized matter and system for injection into furnace |
| CN201000057Y (en) * | 2007-01-09 | 2008-01-02 | 北京科技大学 | Small-sized coal fines combustion boiler set |
Non-Patent Citations (1)
| Title |
|---|
| JP平10-290941A 1998.11.04 |
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