CN213810713U - Boiler top air intake system of thermal power plant - Google Patents
Boiler top air intake system of thermal power plant Download PDFInfo
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- CN213810713U CN213810713U CN202022688014.0U CN202022688014U CN213810713U CN 213810713 U CN213810713 U CN 213810713U CN 202022688014 U CN202022688014 U CN 202022688014U CN 213810713 U CN213810713 U CN 213810713U
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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
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Abstract
The utility model relates to the technical field of thermal power plant boilers, in particular to a furnace top air intake system of a thermal power plant boiler; the boiler comprises a boiler room, a boiler arranged in the boiler room and a flue communicated with the boiler, wherein a ventilation device is arranged at the top of the boiler room, an air supply channel is arranged between the boiler room and the boiler, the ventilation device is communicated with the air supply channel, an air preheater is arranged at one end, far away from the boiler, of the flue, the boiler room is also communicated with an air feeder, and an adjustable louver is arranged at the inlet of the air feeder; the utility model discloses can improve air supply temperature and boiler efficiency, reduce the fault rate of steam air heater, improve the security of equipment operations such as air preheater, improve equipment's operation life.
Description
Technical Field
The utility model relates to a boiler technical field of thermal power plant, concretely relates to boiler furnace roof air intake system of thermal power plant.
Background
In a thermal power plant, the combustion of fuel in a boiler is not separated from the combustion of the oxidant in air, which is one of the necessary conditions for the fuel to be able to burn, so that a suitable and moderate amount of oxidant contributes to the continuous and stable combustion of the fuel, while the most important oxidant for the combustion of the fuel is the oxygen in air, so that the delivery and demand of air are essential in the combustion of the fuel in the boiler.
Along with the stricter of environmental protection supervision, a lot of coal fired boilers have all increased necessary desulfurization, denitration and dust collecting equipment, and the increase of equipment among the boiler system can arouse the reduction of the temperature of exhaust system under the same operating mode certainly. Under the working condition in winter, the possibility of low-temperature corrosion of the cold end of the air preheater is increased inevitably due to continuous temperature reduction, and under the condition, the possibility of low-temperature corrosion of the air preheater is reduced by a method of improving the air supply temperature of a boiler and the comprehensive temperature of the cold end of the air preheater through a steam air heater generally. The long-term frequent operation and withdrawal of the air heater inevitably cause the phenomena of deformation, leakage and the like of the air heater due to the change of thermal stress, or cause the system to freeze under the working condition in winter due to improper operation, thereby influencing the safety of equipment.
In addition, the conventional air intake system of the boiler directly takes air from the atmosphere, and under the working condition in winter, because the ambient temperature is too low, the air supply temperature of the boiler is low, the delivery volume of the steam air heater is large, the steam consumption is large, the ignition energy required by combustion is increased, and under the same working condition with knowledge, the coal combustion amount of the boiler is increased, so that the efficiency of the boiler is reduced.
At present, in order to improve the air supply temperature of a boiler and reduce the possibility of low-temperature corrosion of the cold end of an air preheater, most manufacturers increase the air supply temperature of the boiler by adding a hot medium water air heater system, and improve the comprehensive temperature of the cold end of the air preheater, and the heat source of the hot medium water air heater is taken from water heated by a steam extraction heater of a steam turbine.
The conventional boiler air intake system is low in air intake temperature and easy to cause low-temperature corrosion of the cold end of the air preheater, and in order to prevent the low-temperature corrosion, a steam air heater is usually arranged in front of the air preheater to increase the air supply temperature. The steam air heater is generally of a tubular structure, the joint of a pipeline and the end face is cracked due to the change of thermal stress after the steam air heater is frequently thrown and retreated, so that leakage is caused, and the possibility that the air heater is frozen once the air heater is leaked under the working condition in winter is greatly increased. In addition, in the conventional air intake system, the heat radiation of the boiler wall is not utilized and lost, which causes the reduction of the boiler efficiency.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem who provides among the prior art, the utility model provides a boiler furnace roof air intake system of thermal power plant, it can improve air supply temperature and boiler efficiency, reduces the fault rate of steam air heater, improves the security of equipment operations such as air preheater, improve equipment's life.
In order to achieve the above object, the utility model provides a following technical scheme:
the utility model provides a boiler furnace roof air intake system of thermal power plant, includes the boiler room, sets up the boiler in the boiler room and the flue that is linked together with the boiler, boiler room top is provided with ventilation unit, be provided with the air supply passageway between boiler room and the boiler, ventilation unit and air supply passageway intercommunication set up, the one end that the boiler was kept away from to the flue is provided with the air preheater, the boiler room still communicates and is provided with the forced draught blower, the forced draught blower entrance is provided with adjustable tripe.
Further, ventilation unit includes adjustable fender and sets up the control cable wire at adjustable fender both ends, the air intake has been seted up at boiler roof portion, the air intake below is provided with one row of deflector roll, adjustable fender sets up on the deflector roll.
Further, the air conditioner further comprises a controller, a temperature sensor and a motor, wherein the temperature sensor and the motor are connected with the controller, the temperature sensor is arranged at an air outlet of the air feeder, and the control steel cable is connected with the motor.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model discloses can effectively improve and get into air supply temperature, because of the flow of air effectively reduces the temperature in the boiler room, air supply temperature's improvement helps reducing air preheater cold junction low temperature corrosion's possibility and the rate of commissioning that reduces steam air heater, and heat transfer among the air flow channel has prevented the thermal loss of boiler wall loss, improves the thermal utilization ratio of boiler burning, the effectual boiler efficiency that has improved.
2. The circulation channel of the boiler air supply system is changed by modifying the boiler room, so that the influence of different environmental temperatures on the system is reduced, and the air supply temperature and the boiler efficiency are improved; steam-water systems and other systems of the boiler can meet the requirements of equipment on parameters under most working conditions without modification; the failure rate of the steam air heater is reduced, the running safety of equipment such as an air preheater is improved, and the running service life of the equipment is prolonged.
Drawings
FIG. 1 is a schematic structural view of a heat-engine plant boiler top air intake system of the present invention;
fig. 2 is the utility model discloses a boiler furnace roof air intake system ventilation unit schematic structure diagram of thermal power plant.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1 and fig. 2, the present invention provides a technical solution:
the utility model provides a thermal power plant boiler furnace roof air intake system, includes boiler room 1, sets up boiler 2 in boiler room 1 and the flue 3 that is linked together with boiler 2, 2 tops in boiler room are provided with ventilation unit 4, be provided with air supply channel 5 between boiler room 1 and the boiler 2, ventilation unit 4 sets up with air supply channel 5 intercommunication, the one end that boiler 6 was kept away from to flue 3 is provided with air preheater 6, boiler room 6 still communicates and is provided with forced draught blower 7, 7 entrances of forced draught blower are provided with adjustable tripe 8.
As a specific embodiment of the present invention, the ventilation device 4 includes a movable baffle 41 and a control cable 42 disposed at two ends of the movable baffle 41, the top of the boiler room is provided with an air inlet 10, a row of guide rollers 43 is disposed below the air inlet, and the movable baffle 41 is disposed on the guide rollers 43; the air conditioner further comprises a controller 9, a temperature sensor 91 and a motor 92, wherein the temperature sensor 91 and the motor 92 are connected with the controller, the temperature sensor is arranged at an air outlet of the air feeder, and the control steel cable is connected with the motor.
The utility model provides a thermal power plant boiler furnace roof air intake system can carry out the switching of wind regime according to ambient temperature's change, during the operating mode in winter, close the adjustable tripe of forced draught blower entrance, the forced draught blower is got the wind from the air intake at boiler house top, the air passes through the air supply passageway entering forced draught blower between brickwork and the boiler plant, carry out the heat exchange with the wall body of boiler in the passageway, the improvement gets into air supply temperature, effectively reduce the temperature in the factory building because of the flow of air, air supply temperature's improvement helps reducing the possibility of air preheater cold junction low temperature corrosion and reduces the rate of commissioning of steam air heater, heat transfer among the air flow channel has prevented boiler wall body loss of heat, improve the thermal utilization ratio of boiler burning, the effectual boiler efficiency that has improved.
The utility model discloses a transformation work lies in constructing the transformation of building through the boiler factory building, found air supply passage between boiler factory building and boiler furnace wall all around, keep apart forced draught blower entrance and outdoor environment, found the air supply passageway UNICOM of sending between forced draught blower entry and boiler room and the boiler furnace wall simultaneously, and set up the openable baffle that satisfies the amount of wind under each operating mode of boiler at boiler room top, build the adjustable tripe that satisfies the amount of wind under each operating mode of boiler at the forced draught blower entrance, set up temperature sensor in forced draught blower air outlet department, the closed degree of adjustable fender and air intake can be controlled by the controller according to the temperature of required air supply, control the intake from the air intake promptly.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (3)
1. The utility model provides a boiler furnace roof air intake system of thermal power plant which characterized in that: including boiler room, the boiler of setting in the boiler room and the flue that is linked together with the boiler, boiler roof portion is provided with ventilation unit, be provided with the air supply passageway between boiler room and the boiler, ventilation unit and air supply passageway intercommunication set up, the one end that the boiler was kept away from to the flue is provided with the air preheater, the boiler room still communicates and is provided with the forced draught blower, the forced draught blower entrance is provided with adjustable tripe.
2. The thermal power plant boiler top air intake system according to claim 1, characterized in that: the ventilating device comprises a movable baffle and control steel cables arranged at two ends of the movable baffle, an air inlet is formed in the top of the boiler room, a row of guide rollers are arranged below the air inlet, and the movable baffle is arranged on the guide rollers.
3. The thermal power plant boiler top air intake system according to claim 2, characterized in that: the temperature sensor is arranged at the air outlet of the air feeder, and the control steel cable is connected with the motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022688014.0U CN213810713U (en) | 2020-11-19 | 2020-11-19 | Boiler top air intake system of thermal power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022688014.0U CN213810713U (en) | 2020-11-19 | 2020-11-19 | Boiler top air intake system of thermal power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213810713U true CN213810713U (en) | 2021-07-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022688014.0U Active CN213810713U (en) | 2020-11-19 | 2020-11-19 | Boiler top air intake system of thermal power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213810713U (en) |
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2020
- 2020-11-19 CN CN202022688014.0U patent/CN213810713U/en active Active
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