CN212299055U - Cooling air device is examined to thermal power plant's boiler fire - Google Patents
Cooling air device is examined to thermal power plant's boiler fire Download PDFInfo
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- CN212299055U CN212299055U CN202020302599.5U CN202020302599U CN212299055U CN 212299055 U CN212299055 U CN 212299055U CN 202020302599 U CN202020302599 U CN 202020302599U CN 212299055 U CN212299055 U CN 212299055U
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- cooling air
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- air
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Abstract
The utility model belongs to the technical field of cooling arrangement, especially, relate to a boiler fire detection cooling air device of thermal power plant, including the female pipe of cooling air, the female pipe income wind gap of the female pipe of cooling air has two cooling blower through the parallelly connected baffle-type three-way valve, still includes cooling air standby device, and cooling air standby device includes the auxiliary cooling tuber pipe, and the auxiliary cooling tuber pipe is parallelly connected in the female pipe income wind gap of the female pipe of cooling air, is equipped with first shut-off valve, flow control valve between the auxiliary pipe income wind gap of auxiliary cooling tuber pipe and the female pipe income wind gap in proper order, and the auxiliary pipe income wind gap is connected with sealed fan; and a second shut-off valve is arranged between the cooling air main pipe and the baffle type three-way valve. The utility model discloses a sealed air cooling fire detects the probe, has improved the reliability that the probe cooling air device was examined to the fire, reduces the risk of putting out a fire of boiler.
Description
Technical Field
The utility model belongs to the technical field of cooling arrangement, especially, relate to a cooling air device is examined to thermal power plant's boiler fire.
Background
The wall surface in the furnace chamber of the boiler of the thermal power plant is provided with fire detection probes, the fire detection probes are used for monitoring the combustion condition of flame in the furnace chamber in real time and transmitting the combustion condition of the flame to the control chamber, and the controller in the control chamber adjusts the operation control parameters of the boiler according to the combustion condition of the flame so as to ensure that the boiler normally and safely operates. Because the fire detection probe is arranged in the hearth with higher temperature, in order to ensure the normal use of the fire detection probe, the fire detection probe in the hearth needs to be cooled by a fire detection cooling air device.
The cooling air device of the fire detection probe of the boiler of the thermal power plant is provided with a cooling air main pipe, an air outlet of the cooling air main pipe is connected with a fire detection probe cooling pipe network, the cooling air main pipe is connected with a pressure sensor, an air inlet of the cooling air main pipe is connected with two cooling fans through a baffle type three-way valve, and inlets of the cooling fans are respectively connected with a filter screen.
The cooling fan of the cooling air device of the fire detection probe of the boiler of the thermal power plant is provided with two cooling fans, when the cooling fan is used, one cooling fan runs and is an operating fan, the other cooling fan is standby and is a standby fan, and a chain starting device is arranged between the operating fan and the standby fan. When the cooling air supply device is used, the baffle type three-way valve is used for communicating the running fan with the cooling air main pipe and isolating the standby fan from the cooling air main pipe.
In the process of cooling the fire detection probe by cooling air, insufficient output power and even tripping phenomenon can occur when the fan is operated. When the operation fire detection cooling fan trips or the pressure is lower than a set value, the standby fire detection cooling fan can be started in a linkage manner. According to the condition of the outlet pressure of the fans at the two sides, the baffle type three-way valve automatically switches the two fans, so that the cooling air in the cooling air main pipe is normal, and the normal cooling of the fire detection probe is ensured.
The cooling fan outlet of the cooling air device of the boiler fire detection probe of the thermal power plant is connected with the baffle type three-way valve, the sealing performance of the baffle type three-way valve is unstable, when the baffle type three-way valve is used, a large amount of cooling air discharged by an operating fan can enter a standby fan, the standby fan is inverted, the pressure and the flow of the cooling air in a cooling air main pipe are lost, when the pressure of the cooling air in the cooling air main pipe cannot meet the system requirement, the boiler can be used for extinguishing fire, if the standby fan is inverted, in the process of chain starting, the resistance of the backflow air needs to be overcome, the starting current is overlarge, and even the situation that the standby motor. The hidden troubles cause the cooling air device of the fire detection probe of the boiler in the thermal power plant to be in an unreliable standby state.
In the prior art, the cooling air device of the fire detection probe of the boiler of the thermal power plant only uses two cooling fans to provide cooling air and has no auxiliary equipment. Once the abnormal working condition occurs, the safe and stable operation of the boiler can be influenced. Therefore, the cooling air device for the fire detection of the boiler in the thermal power plant is provided.
SUMMERY OF THE UTILITY MODEL
The utility model provides a cooling air device is examined to thermal power plant's boiler fire, aim at improves the reliability that probe cooling air device was examined to the fire, reduces the risk of putting out a fire of boiler.
In order to achieve the above object, the utility model adopts the following technical scheme:
a fire detection cooling air device of a boiler of a thermal power plant comprises a cooling air main pipe, a main pipe air inlet of the cooling air main pipe is connected with two cooling fans in parallel through a baffle type three-way valve, and the fire detection cooling air device also comprises a cooling air standby device, wherein the cooling air standby device comprises an auxiliary cooling air pipe, the auxiliary cooling air pipe is connected in parallel at the main pipe air inlet of the cooling air main pipe, a first shutoff valve and a flow regulating valve are sequentially arranged between an auxiliary pipe air inlet of the auxiliary cooling air pipe and the main pipe air inlet, and the auxiliary pipe air inlet is connected with a sealing fan; and a second shut-off valve is arranged between the cooling air main pipe and the baffle type three-way valve.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. the utility model discloses an on current fire detection cooling air device, newly-increased cooling air standby device, this cooling air standby device include the auxiliary cooling tuber pipe, and the auxiliary cooling tuber pipe is parallelly connected and is gone into wind gap department at the female pipe of cooling air female pipe, and the auxiliary income wind gap of auxiliary cooling tuber pipe is gone into to be equipped with first shutoff valve, flow control valve between the wind gap with female pipe in proper order, is equipped with the second shutoff valve between the female pipe income wind gap of the female pipe of cooling air and baffle formula three-way valve simultaneously. When the boiler of the thermal power plant normally operates and stops operating, because the sealed air pressure is excessive, the cooling fan can be stopped operating, the second shutoff valve is disconnected, the first shutoff valve is closed, the flow regulating valve is opened to regulate the flow of the sealed air in the auxiliary cooling air pipe, and the excessive air quantity of the sealed air is discharged to the fire detection probe cooling pipe network. Therefore, the running time of the cooling fan can be greatly reduced, the fault rate of the fire detection cooling fan is reduced, the energy consumption is reduced, and the long-period safe and stable running of the boiler is effectively guaranteed.
2. The utility model discloses connect sealed fan at auxiliary cooling tuber pipe, the sealed wind that provides through sealed fan examines the auxiliary cooling wind of probe cooling usefulness as the fire, and the wind pressure is higher, and the cooling effect is better, has improved the utilization ratio of sealed wind. After the main fuel of the boiler trips, the primary fan stops, but the sealing fan does not stop, and the reliability of the standby cooling air source selected from sealing air is higher.
Drawings
Fig. 1 is a schematic structural diagram of a cooling air device for fire detection of a boiler in a thermal power plant.
Wherein: 1-cooling a main air pipe; 2-a main pipe air outlet; 3-a fire detection probe cooling pipe network; 4-a pressure sensor; 5-a main pipe air inlet; 6-baffle type three-way valve; 7-operating the fan; 8, a standby fan; 9-a first screen; 10-a second screen; 11-auxiliary cooling air pipe; 12-auxiliary tube air inlet; 13-a first shut-off valve; 14-a flow regulating valve; 15-second shut-off valve.
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.
As shown in figure 1, a boiler fire detection cooling air device of a thermal power plant comprises a cooling air main pipe 1, a main pipe air outlet 2 of the cooling air main pipe 1 is connected with a fire detection probe cooling pipe network 3, a pressure sensor 4 is arranged on the cooling air main pipe 1, a main pipe air inlet 5 of the cooling air main pipe 1 is connected with two cooling fans in parallel through a baffle type three-way valve 6, and a second shutoff valve 15 is arranged between the cooling air main pipe 1 and the baffle type three-way valve 6. The cooling fan comprises an operation fan 7 and a standby fan 8, and inlets of the operation fan 7 and the standby fan 8 are respectively connected with a first filter screen 9 and a second filter screen 10.
The cooling air device is examined to boiler fire of thermal power plant still includes cooling air standby device, and this cooling air standby device includes auxiliary cooling tuber pipe 11, and auxiliary cooling tuber pipe 11 connects in parallel on the female pipe income wind gap 5 of cooling air female pipe 1, and auxiliary cooling tuber pipe income wind gap 12 of auxiliary cooling tuber pipe 11 and female pipe are gone into and are equipped with first shut-off valve 13 and flow control valve 14 between the wind gap 5 in proper order, and auxiliary cooling tuber pipe 11's auxiliary pipe is gone into wind gap 12 and is connected sealed fan.
The utility model discloses an application principle:
when the boiler of the thermal power plant normally operates, the cooling fan is shut down, the second shutoff valve 15 is disconnected, the first shutoff valve 13 is opened, the flow of the sealing air in the auxiliary cooling air pipe 11 is adjusted by the flow adjusting valve 14, the sealing air enters the fire detection probe cooling pipe network 3, and the fire detection probe is cooled by the sealing air. In the process of starting and stopping the boiler of the thermal power plant, the sealing air pressure is excessive, the cooling fan can be closed, the second shutoff valve 15 is disconnected, the first shutoff valve 13 and the flow regulating valve 14 of the auxiliary cooling air pipe 11 are opened, the excessive air quantity of the sealing air is discharged to the fire detection probe cooling pipe network 3, the fire detection probe is cooled, the efficient utilization of the air quantity is achieved, and energy is saved.
The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical application, to thereby enable others skilled in the art to best understand and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.
Claims (1)
1. The utility model provides a cooling air device is examined to boiler fire of thermal power plant, includes the female pipe of cooling air (1), the female pipe income wind gap (5) of the female pipe of cooling air (1) have two cooling blower through baffle formula three-way valve (6) parallelly connected, its characterized in that: the cooling air standby device comprises an auxiliary cooling air pipe (11), the auxiliary cooling air pipe (11) is connected in parallel to a main pipe air inlet (5) of a cooling air main pipe (1), a first shut-off valve (13) and a flow regulating valve (14) are sequentially arranged between an auxiliary pipe air inlet (12) of the auxiliary cooling air pipe (11) and the main pipe air inlet (5), and the auxiliary pipe air inlet (12) is connected with a sealing fan; and a second shut-off valve (15) is arranged between the cooling air main pipe (1) and the baffle type three-way valve (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020302599.5U CN212299055U (en) | 2020-03-12 | 2020-03-12 | Cooling air device is examined to thermal power plant's boiler fire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020302599.5U CN212299055U (en) | 2020-03-12 | 2020-03-12 | Cooling air device is examined to thermal power plant's boiler fire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212299055U true CN212299055U (en) | 2021-01-05 |
Family
ID=73958071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020302599.5U Expired - Fee Related CN212299055U (en) | 2020-03-12 | 2020-03-12 | Cooling air device is examined to thermal power plant's boiler fire |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212299055U (en) |
-
2020
- 2020-03-12 CN CN202020302599.5U patent/CN212299055U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210105 |
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| CF01 | Termination of patent right due to non-payment of annual fee |