CN203115996U - Hearth air intake adjusting device of biomass circulating fluidized bed boiler - Google Patents
Hearth air intake adjusting device of biomass circulating fluidized bed boiler Download PDFInfo
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- CN203115996U CN203115996U CN 201320103513 CN201320103513U CN203115996U CN 203115996 U CN203115996 U CN 203115996U CN 201320103513 CN201320103513 CN 201320103513 CN 201320103513 U CN201320103513 U CN 201320103513U CN 203115996 U CN203115996 U CN 203115996U
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- secondary air
- air
- jet device
- hearth
- air jet
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Abstract
The utility model discloses a hearth air intake adjusting device of a biomass circulating fluidized bed boiler. The hearth air intake adjusting device comprises an air room arranged at the bottom of a hearth, wherein a side wall inlet of the air room is connected with an ignition air flue, an air distribution device is arranged at the outlet at the top of the air room, a lower layer secondary air spraying device, a middle layer secondary air spraying device and an upper layer secondary air spraying device are sequentially arranged at intervals on the side wall of the hearth and above a feeding device, and the mounting height range of the lower layer secondary air spraying device, the middle layer secondary air spraying device and the upper layer secondary air spraying device locates in a region 12 cm higher than an air distribution device. According to the utility model, a fuel burning area above a boiler feeding port can be well controlled to be longer, with the assistance of the auxiliary heating surface of the hearth, the phenomena of intense and concentrated burning can be avoided, and the phenomena of high temperature and burns in partial region of the hearth can be well overcome, so that the situation that boiler is prevented from load down running can be ensured.
Description
Technical field
The utility model relates to biomass circulating fluid bed boiler, refers to a kind of biomass circulating fluid bed boiler furnace air intake adjusting device particularly.
Background technology
Along with society growing to energy demand, promptly reduce as the fossil fuel in main energy sources source, reproducible alternative energy source such as living beings becomes the focus of social common concern, and utilizing biomass power generation is that the most ripe living beings of technology are utilized mode.At present, available biomass fuel mainly contains: forestry waste such as agricultural wastes such as rice husk, cotton stalk, rice straw, rape stalk and cornstalk and branch bavin, timber leftover pieces, tree root, the characteristic of these biomass fuels is: the combustible basis fugitive constituent is up to more than 70%, very easily catch fire, burning is violent, concentrated, and ash fusion point is low.In the boiler wind speed adjustment design, must give enough attention to the characteristic of these biomass fuels.
Prior biological matter burning in circulating fluid bed boiler required air arrangement apparatus is that a certain amount of wind is sent into from burner hearth bottom, guarantee burner hearth bottom realization fluidization, secondary wind feeder is certain altitude one deck or two-layer layout above burner hearth bottom, thereby guarantees the required air capacity of fuel completing combustion.But at biomass fuel, such air arrangement apparatus but forms higher temperature in the 4m zone more than the boiler material inlet easily, causes this zone water-cooled wall hanging Jiao.Because the biomass fuel fugitive constituent is very high, it is violent and concentrated very easily to catch fire, burn, the control of combustion air amount is bad, the fuel combustion share is just big in the above 4m of boiler material inlet zone, cause this regional temperature higher, cause water-cooled wall hanging Jiao, in order to prevent the appearance of this situation, the boiler load down operation of just having to.
Summary of the invention
The purpose of this utility model will provide a kind of biomass circulating fluid bed boiler furnace air intake adjusting device exactly, by changing the biomass boiler burning air distribution mode of wind, regulate the above 4m of boiler material inlet zone fuel combustion share, control this zone flue-gas temperature, boiler flue-gas temperature on furnace height is tending towards evenly, thereby avoids biomass circulating fluid bed boiler furnace localized hyperthermia.
For achieving the above object, the biomass circulating fluid bed boiler furnace air intake adjusting device that the utility model is designed, comprise the air compartment that is arranged on burner hearth bottom, the import of described air compartment sidewall is connected with ignition air duct, described air compartment top exit is provided with air-distribution device, its special character is: be positioned at the charging gear top on the described burner hearth sidewall and be arranged at intervals with lower floor's secondary air jet device successively, middle level secondary air jet device and upper strata secondary air jet device, described lower floor secondary air jet device, middle level secondary air jet device and upper strata secondary air jet Unit Installation altitude range are in the above 12m of the air-distribution device zone.
As preferred version, also be provided with auxiliary heating surface on the described inboard wall of burner hearth, described auxiliary heating surface is positioned between the above 3 ~ 10m height of charging gear.Like this, can further improve this regional heating status, avoid this zone burner hearth localized hyperthermia.
Further, described auxiliary heating surface is the membrane wall structure that heat pipe and band steel combine.It is simple and reliable for structure, the heat transmission is rapid.
Further, described lower floor secondary air jet device is arranged on the burner hearth awl section sidewall, and described middle level secondary air jet device and upper strata secondary air jet device are arranged on the burner hearth straight section sidewall.Like this, but the reasonable distribution secondary air is guaranteed temperature equalization in the above 4m of the boiler material inlet zone.
Advantage of the present utility model is: the boiler fluidization is sent into burner hearth with wind from the burner hearth bottom air-distribution device, three layers of secondary air separatings are sent into burner hearth from the burner hearth middle and lower part, guarantee full combustion of fuel and strengthen the gas stream in the stove disturbance, mix, by adjusting lower floor's secondary air jet device, middle level secondary air jet device and upper strata secondary air jet device spray into the air capacity of burner hearth, guarantee full combustion of fuel and strengthening the gas stream in the stove disturbance, under the situation of mixing, can control the above regional fuel combustion share of boiler charging gear preferably, make the fuel combustion zone elongated, be aided with the burner hearth auxiliary heating surface again, avoid occurring the violent and concentrated phenomenon of burning, having solved the burner hearth regional area well high temperature occurs and hangs burnt phenomenon, guarantee that therefore boiler the load down operation can not occur, and this utility model is simple in structure, realizes easily.
Description of drawings
Fig. 1 is a kind of structural representation of biomass circulating fluid bed boiler furnace air intake adjusting device.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail:
As shown in Figure 1, the biomass circulating fluid bed boiler furnace air intake adjusting device that the utility model is designed, comprise the air compartment 2 that is arranged on burner hearth 4 bottoms, air compartment 2 sidewall imports are connected with ignition air duct 1, air compartment 2 top exits are provided with air-distribution device 3, are positioned at charging gear 5 tops on burner hearth 4 sidewalls and are arranged at intervals with lower floor's secondary air jet device 6, middle level secondary air jet device 7 and upper strata secondary air jet device 8 successively.Wherein, lower floor's secondary air jet device 6, middle level secondary air jet device 7 and upper strata secondary air jet device 8 all comprise nozzle, tube connector, bellows, support respectively, and lower floor's secondary air jet device 6 is arranged on the burner hearth 4 awl section sidewalls, and middle level secondary air jet device 7 and upper strata secondary air jet device 8 are arranged on the burner hearth 4 straight section sidewalls.Simultaneously, the setting height(from bottom) scope of lower floor's secondary air jet device 6, middle level secondary air jet device 7 and upper strata secondary air jet device 8 is in the air-distribution device 3 above 12m zones.In addition, also be provided with the auxiliary heating surface 9 of the membrane wall structure that is combined by heat pipe and band steel on burner hearth 4 inwalls, auxiliary heating surface 9 is positioned at charging gear more than 5 between 3 ~ 10m height.
When the utility model uses, one time wind, secondary wind are to send into burner hearth 4 like this: one time wind is sent into from burner hearth 4 bottoms by ignition air duct 1, air compartment 2 and air-distribution device 3, they provide boiler fluidization wind and the required part air of fuel combustion, this part air quantity accounts for boiler and always uses 40% ~ 50% of air quantity, three layers of secondary air separatings from burner hearth 4 middle and lower parts, air-distribution device sends in the 3 above 12m zones, guarantee full combustion of fuel and strengthen gas stream in the stove disturbance, mixing, this part air quantity accounts for boiler and always uses 35% ~ 45% of air quantity.
Claims (4)
1. biomass circulating fluid bed boiler furnace air intake adjusting device, comprise the air compartment (2) that is arranged on burner hearth (4) bottom, described air compartment (2) sidewall import is connected with ignition air duct (1), described air compartment (2) top exit is provided with air-distribution device (3), it is characterized in that: be positioned at charging gear (5) top on described burner hearth (4) sidewall and be arranged at intervals with lower floor's secondary air jet device (6) successively, middle level secondary air jet device (7) and upper strata secondary air jet device (8), described lower floor's secondary air jet device (6), the setting height(from bottom) scope of middle level secondary air jet device (7) and upper strata secondary air jet device (8) is in the above 12m of air-distribution device (3) zone.
2. biomass circulating fluid bed boiler furnace air intake adjusting device according to claim 1, it is characterized in that: also be provided with auxiliary heating surface (9) on described burner hearth (4) inwall, described auxiliary heating surface (9) is positioned between the above 3 ~ 10m height of charging gear (5).
3. biomass circulating fluid bed boiler furnace air intake adjusting device according to claim 2 is characterized in that: the membrane wall structure that described auxiliary heating surface (9) combines for heat pipe and band steel.
4. according to claim 1 or 2 or 3 described biomass circulating fluid bed boiler furnace air intake adjusting devices, it is characterized in that: described lower floor's secondary air jet device (6) is arranged on burner hearth (4) the awl section sidewall, and described middle level secondary air jet device (7) and upper strata secondary air jet device (8) are arranged on burner hearth (4) the straight section sidewall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320103513 CN203115996U (en) | 2013-03-07 | 2013-03-07 | Hearth air intake adjusting device of biomass circulating fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320103513 CN203115996U (en) | 2013-03-07 | 2013-03-07 | Hearth air intake adjusting device of biomass circulating fluidized bed boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203115996U true CN203115996U (en) | 2013-08-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320103513 Expired - Fee Related CN203115996U (en) | 2013-03-07 | 2013-03-07 | Hearth air intake adjusting device of biomass circulating fluidized bed boiler |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103712208A (en) * | 2013-12-25 | 2014-04-09 | 北京兴侨国际工程技术有限公司 | Combustion method of circulating fluidized bed boiler with low nitrogen oxide emission |
| CN104279556A (en) * | 2014-09-30 | 2015-01-14 | 东方电气集团东方锅炉股份有限公司 | Secondary air distribution method for circulating fluidized bed boiler |
| CN104315504A (en) * | 2014-08-21 | 2015-01-28 | 中国华能集团清洁能源技术研究院有限公司 | A circulating fluidized bed boiler capable of inhibiting formation of a combustion high-temperature region and an inhibiting method |
| CN106813239A (en) * | 2017-03-24 | 2017-06-09 | 苏州迪森生物能源有限公司 | A kind of boiler furnace device |
-
2013
- 2013-03-07 CN CN 201320103513 patent/CN203115996U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103712208A (en) * | 2013-12-25 | 2014-04-09 | 北京兴侨国际工程技术有限公司 | Combustion method of circulating fluidized bed boiler with low nitrogen oxide emission |
| CN104315504A (en) * | 2014-08-21 | 2015-01-28 | 中国华能集团清洁能源技术研究院有限公司 | A circulating fluidized bed boiler capable of inhibiting formation of a combustion high-temperature region and an inhibiting method |
| CN104315504B (en) * | 2014-08-21 | 2017-01-11 | 华能国际电力股份有限公司 | Circulating fluidized bed boiler capable of inhibiting formation of combustion high-temperature zone and inhibiting method |
| CN104279556A (en) * | 2014-09-30 | 2015-01-14 | 东方电气集团东方锅炉股份有限公司 | Secondary air distribution method for circulating fluidized bed boiler |
| CN106813239A (en) * | 2017-03-24 | 2017-06-09 | 苏州迪森生物能源有限公司 | A kind of boiler furnace device |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130807 Termination date: 20210307 |