CN204201880U - flue gas recirculation control system - Google Patents
flue gas recirculation control system Download PDFInfo
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- CN204201880U CN204201880U CN201420475394.1U CN201420475394U CN204201880U CN 204201880 U CN204201880 U CN 204201880U CN 201420475394 U CN201420475394 U CN 201420475394U CN 204201880 U CN204201880 U CN 204201880U
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- cfbb
- flue gas
- air
- introduced machine
- chimney
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Abstract
The utility model discloses a kind of flue gas recirculation control system, it comprises CFBB and chimney, it is characterized in that CFBB is provided with recirculating system, cooling air system and flue gas purification system, flue gas purification system is provided with air-introduced machine, and flue gas purification system is by air-introduced machine and chimney, CFBB, recirculating system, cooling air system, flue gas purification system, connected by pipeline between air-introduced machine and chimney, recirculating system one end is located on CFBB, the recirculating system other end is located at the pipeline between air-introduced machine and chimney.A kind of flue gas recirculation control system that the utility model obtains, can to burn non-standard coal, again can combustion standard coal, improve utilization rate of equipment and installations, and reduce the generation of boiler coke, thus ensure that unit energy is stablized, efficiently, continuously run, and effectively control the generation of NOX, also improve the efficiency of desulfurization.
Description
Technical field
The utility model relates to a kind of CFBB boiler technology field, especially a kind of flue gas recirculation control system.
Background technology
CFBB is that a new generation that development in recent years is got up is efficient, low stain clean-burning technology, the advantages such as it has, and efficiency is high, fuel tolerance is wide, Load Regulation is flexible, NOX discharges less, desulfuration efficiency is high.But, when burning in circulating fluid bed boiler special coal types, mix burn living beings or all the non-standard coal such as biomass burnings time, due to the proportioning of primary air flow, the reason such as change, the size variation of fuel particle diameter, the size variation of bed material particle diameter of coal, when in bed material, phosphorus content is too high, as adjusted air quantity or returning charge amount not in time to control bed temperature, bed temperature will sharply rise, and exceed ash fusion point, just can produce high-temperature coking.Once circulating fluidized bed boiler coking, very adverse influence will be caused to set steady, efficient, continuous operation, and reduce the utilization rate of equipment, constrain the raising of economic benefit, be unfavorable for the reduction of discharging of NOX and the raising of desulfuration efficiency simultaneously.
Summary of the invention
The purpose of this utility model is deficiency in order to solve above-mentioned technology and provides one can reduce boiler coke, thus ensures that unit energy is stable, runs efficiently, continuously, and the flue gas recirculation control system of the generation of effective control NOX.
In order to achieve the above object, a kind of flue gas recirculation control system designed by the utility model, it comprises CFBB and chimney, it is characterized in that CFBB is provided with recirculating system, cooling air system and air-introduced machine, CFBB is connected with chimney by air-introduced machine, and be provided with flue gas purification system between CFBB and air-introduced machine, CFBB, recirculating system, cooling air system, flue gas purification system, connected by pipeline between air-introduced machine and chimney, recirculating system one end is located on CFBB, the recirculating system other end is located on the pipeline between air-introduced machine and chimney, such design makes CFBB can to burn special coal types, mix and burn the non-standard coal such as living beings or whole biomass burnings, again can combustion standard coal, improve utilization rate of equipment and installations.
As preferably, recirculating system comprises recirculation damper and recirculation blower, temperature element is provided with in CFBB, and recirculating system is the aperture size being regulated recirculation blower by temperature element, recirculation blower one end is connected with CFBB by recirculation damper, the recirculation blower other end is connected with pipeline, recirculation damper has two and is located at CFBB both sides respectively, such discharge capacity that can reduce NOX, improve the efficiency of desulfurization, and recirculating air volume also can regulate the aperture size of recirculation damper according to temperature element, thus make boiler hearth temperature remain on certain limit, to reach the order ground reducing coking.
In order to ensure the normal combustion of standard coal, also specially reserve the interface of combustion standard coal, cooling air system comprises cooling air flap and overfire air fan, overfire air fan is connected with CFBB by cooling air flap, cooling air flap has two and is located at CFBB both sides respectively, when the fuel employing standard coal of CFBB 1, flue gas recirculation system is out of service, for preventing from altering outside heat smoke in CFBB 1 at recirculation damper, specially draw a road Secondary Air to come as cooling air, this cooling air is provided by overfire air fan 2, and this cooling air controls start and stop by cooling air flap.
A kind of flue gas recirculation control system that the utility model obtains, can be burnt special coal types, mix and burn the non-standard coal such as living beings or whole biomass burnings, again can combustion standard coal, improve utilization rate of equipment and installations, the aperture size of recirculation damper can be regulated according to temperature element, thus make boiler hearth temperature remain on certain limit, to reach the order ground reducing boiler coke, and can also ensure that unit energy is stablized, efficiently, continuous operation, and effectively control the generation of NOX, greatly reduce the discharge capacity of NOX, improve the efficiency of desulfurization, be suitable for promoting on a large scale and using.
Accompanying drawing explanation
Fig. 1 is example structure schematic diagram.
In figure: CFBB 1, chimney 2, recirculating system 3, cooling air system 4, flue gas purification system 5, air-introduced machine 6, pipeline 7, recirculation damper 8, recirculation blower 9, temperature element 10, cooling air flap 11, overfire air fan 12.
Detailed description of the invention
Below by embodiment, the utility model will be further described by reference to the accompanying drawings.
Embodiment 1:
As shown in Figure 1, a kind of flue gas recirculation control system that the present embodiment describes, it comprises CFBB 1 and chimney 2, it is characterized in that CFBB 1 is provided with recirculating system 3, cooling air system 4 and air-introduced machine 6, CFBB 1 is connected with chimney 2 by air-introduced machine 6, and be provided with flue gas purification system 5 between CFBB 1 and air-introduced machine 6, CFBB 1, recirculating system 3, cooling air system 4, flue gas purification system 5, connected by pipeline 7 between air-introduced machine 6 and chimney 2, recirculating system 3 one end is located on CFBB 1, recirculating system 3 other end is located on the pipeline 7 between air-introduced machine 6 and chimney 2, recirculating system 3 comprises recirculation damper 8 and recirculation blower 9, temperature element 10 is provided with in CFBB 1, and recirculating system 3 is the aperture sizes being regulated recirculation blower 9 by temperature element 10, recirculation blower 9 one end is connected with CFBB 1 by recirculation damper 8, recirculation blower 9 other end is connected with pipeline 7, recirculation damper 8 has two and is located at CFBB 1 both sides respectively, cooling air system 4 comprises cooling air flap 11 and overfire air fan 12, overfire air fan 12 is connected with CFBB 1 by cooling air flap 11, cooling air flap 11 has two and is located at CFBB 1 both sides respectively.
Claims (3)
1. a flue gas recirculation control system, it comprises CFBB (1) and chimney (2), it is characterized in that CFBB (1) is provided with recirculating system (3), cooling air system (4) and air-introduced machine (6), CFBB (1) is connected with chimney (2) by air-introduced machine (6), and be provided with flue gas purification system (5) between CFBB (1) and air-introduced machine (6), CFBB (1), recirculating system (3), cooling air system (4), flue gas purification system (5), connected by pipeline (7) between air-introduced machine (6) and chimney (2), recirculating system (3) one end is located on CFBB (1), recirculating system (3) other end is located on the pipeline (7) between air-introduced machine (6) and chimney (2).
2. a kind of flue gas recirculation control system according to claim 1, it is characterized in that described recirculating system (3) comprises recirculation damper (8) and recirculation blower (9), temperature element (10) is provided with in CFBB (1), and recirculating system (3) is the aperture size being regulated recirculation blower (9) by temperature element (10), recirculation blower (9) one end is connected with CFBB (1) by recirculation damper (8), recirculation blower (9) other end is connected with pipeline (7), recirculation damper (8) has two and is located at CFBB (1) both sides respectively.
3. a kind of flue gas recirculation control system according to claim 1, it is characterized in that described cooling air system (4) comprises cooling air flap (11) and overfire air fan (12), overfire air fan (12) is connected with CFBB (1) by cooling air flap (11), and cooling air flap (11) has two and is located at CFBB (1) both sides respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420475394.1U CN204201880U (en) | 2014-08-22 | 2014-08-22 | flue gas recirculation control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420475394.1U CN204201880U (en) | 2014-08-22 | 2014-08-22 | flue gas recirculation control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204201880U true CN204201880U (en) | 2015-03-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420475394.1U Active CN204201880U (en) | 2014-08-22 | 2014-08-22 | flue gas recirculation control system |
Country Status (1)
| Country | Link |
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| CN (1) | CN204201880U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104990072A (en) * | 2015-07-01 | 2015-10-21 | 凤阳海泰科能源环境管理服务有限公司 | Efficient and low NOx emission fluidized bed boiler |
| CN110822446A (en) * | 2019-12-15 | 2020-02-21 | 上海康恒环境股份有限公司 | Flue gas recirculation system with cooling protection device |
-
2014
- 2014-08-22 CN CN201420475394.1U patent/CN204201880U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104990072A (en) * | 2015-07-01 | 2015-10-21 | 凤阳海泰科能源环境管理服务有限公司 | Efficient and low NOx emission fluidized bed boiler |
| CN110822446A (en) * | 2019-12-15 | 2020-02-21 | 上海康恒环境股份有限公司 | Flue gas recirculation system with cooling protection device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |