CN219735357U - Boiler overhauls flue isolation system - Google Patents
Boiler overhauls flue isolation system Download PDFInfo
- Publication number
- CN219735357U CN219735357U CN202321375090.3U CN202321375090U CN219735357U CN 219735357 U CN219735357 U CN 219735357U CN 202321375090 U CN202321375090 U CN 202321375090U CN 219735357 U CN219735357 U CN 219735357U
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- China
- Prior art keywords
- flue
- air
- baffle door
- fan
- boiler
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000002955 isolation Methods 0.000 title claims abstract description 14
- 238000007789 sealing Methods 0.000 claims abstract description 42
- 238000005485 electric heating Methods 0.000 claims description 9
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 8
- 229910052710 silicon Inorganic materials 0.000 claims description 8
- 239000010703 silicon Substances 0.000 claims description 8
- 239000000779 smoke Substances 0.000 abstract description 33
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 13
- 239000003546 flue gas Substances 0.000 abstract description 13
- 238000012423 maintenance Methods 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 5
- 238000007689 inspection Methods 0.000 abstract description 3
- 238000012824 chemical production Methods 0.000 description 3
- 238000010248 power generation Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The utility model discloses a boiler overhaul flue isolation system, wherein an air outlet of a sealing fan is connected with an air inlet of an air electric heater, an air outlet of the air electric heater is respectively connected with sealing air pipes with the number corresponding to that of the induced fans, each sealing air pipe is connected with the connecting part of the corresponding induced fan and a flue, an inner flue gas baffle door and an outer flue gas baffle door are arranged at the connecting part of the flue and each induced fan, and the inner flue gas baffle door and the outer flue gas baffle door are respectively arranged at the front end and the rear end of the sealing air pipe. After the boiler is shut down, the inner smoke baffle door and the outer smoke baffle door are closed, and a sealing air system is used, so that the smoke in the flue can be prevented from being reversely moved into a overhauled hearth, and the safety of an inspection and maintenance person is ensured; and in the parallel operation of a plurality of boilers, the problem of safety isolation of simultaneous overhaul of one or a plurality of boilers can be solved, so that the safety and the controllability of the overhaul operation process are ensured, and the power consumption of the induced draft fan is also saved.
Description
Technical field:
the utility model relates to the field of boiler maintenance, in particular to a boiler maintenance flue isolation system.
The background technology is as follows:
the boiler is used as a steam supply unit for thermal power generation and chemical production, and mainly provides qualified steam quality for a steam turbine, a large turbine set and a compressor set for chemical production, and is used for generating power and driving each large compressor to normally operate. In thermal power generation and chemical production processes, most boilers are operated in parallel and share one flue, and boiler overhaul is an alternate overhaul, in the overhaul process, no smoke is required to be ensured to be reversely connected to the inside of an overhaul boiler through the shared flue, so that the life safety of operators for in-furnace inspection and maintenance is ensured, in order to ensure the safety of the overhaul process, most enterprises adopt induced draft fans to continuously operate, maintain negative pressure in a hearth to prevent reverse connection of smoke, and when the power consumption of the induced draft fans is increased, the induced draft fans cannot be stopped for overhaul, so that defects in the operation of the induced draft fans cannot be effectively maintained, and serious hidden dangers are buried for the safe operation of the boiler in the future.
The utility model comprises the following steps:
the utility model aims to provide a boiler overhaul flue isolation system.
The utility model is implemented by the following technical scheme:
the utility model provides a boiler overhauls flue isolation system, includes many induced fans, every the air intake of induced fan is connected with the exhaust port of a boiler, the air exit of induced fan is connected with the flue, the flue is connected with the chimney, and it still includes sealed fan, sealed fan's air exit is connected with air heater's air inlet, air heater gas vent is connected with the sealed tuber pipe corresponding with induced fan quantity respectively, every sealed tuber pipe is connected with the junction of corresponding induced fan and flue the flue with every interior smoke baffle door and outer smoke baffle door are installed to the junction of induced fan, interior smoke baffle door with outer smoke baffle door is arranged in respectively the front end and the rear end of sealed tuber pipe.
Preferably, each sealing air pipe is connected with two sub-sealing pipes respectively, and each sub-sealing pipe is correspondingly connected to a flue between the inner smoke baffle door and the outer smoke baffle door and is close to one side of the inner smoke baffle door opposite to the outer smoke baffle door.
Preferably, a sealing air valve is arranged on each sealing pipe.
Preferably, a temperature sensor is installed at the air outlet of the air electric heater, a signal output end of the temperature sensor is electrically connected with a signal input end of the silicon controlled rectifier electric heating power regulator, and a signal output end of the silicon controlled rectifier electric heating power regulator is electrically connected with a signal input end of the air electric heater.
The utility model has the advantages that: after the boiler is shut down, the inner smoke baffle door and the outer smoke baffle door are closed, and a sealing air system is used, so that the smoke in the flue can be prevented from being reversely moved into a overhauled hearth, and the safety of an inspection and maintenance person is ensured; and in the parallel operation of a plurality of boilers, the problem of safety isolation of simultaneous overhaul of one or a plurality of boilers can be solved, so that the safety and the controllability of the overhaul operation process are ensured, and the power consumption of the induced draft fan is also saved.
Description of the drawings:
fig. 1 is a schematic structural view of the present utility model.
In the figure: the device comprises an induced draft fan 1, a flue 2, a sealing fan 3, an air electric heater 4, a sealing air pipe 5, an inner smoke baffle door 6, an outer smoke baffle door 7, a sealing pipe 8, a sealing air valve 9, a temperature sensor 10 and a silicon controlled rectifier electric heating power regulator 11.
The specific embodiment is as follows:
as shown in fig. 1, the boiler overhaul flue isolation system comprises a plurality of induced draft fans 1, wherein an air inlet of each induced draft fan 1 is connected with a smoke outlet of a boiler, an air outlet of each induced draft fan 1 is connected with a flue 2, the flue 2 is connected with a chimney, the boiler overhaul flue isolation system further comprises a sealing fan 3, the air outlet of the sealing fan 3 is connected with air inlets of air electric heaters 4, the air outlets of the air electric heaters 4 are respectively connected with sealing air pipes 5 corresponding to the number of the induced draft fans 1, each sealing air pipe 5 is connected with a joint of the corresponding induced draft fan 1 and the flue 2, an inner flue gas baffle door 6 and an outer flue gas baffle door 7 are arranged at the joint of the flue 2 and each induced draft fan 1, and the inner flue gas baffle door 6 and the outer flue gas baffle door 7 are respectively arranged at the front end and the rear end of the sealing air pipes 5;
each sealing air pipe 5 is respectively connected with two sub sealing pipes 8, and each sub sealing pipe 8 is correspondingly connected to the flue 2 between the inner flue gas baffle door 6 and the outer flue gas baffle door 7 and is close to one opposite side of the inner flue gas baffle door 6 and the outer flue gas baffle door 7; each sub sealing pipe 8 is provided with a sealing air valve 9;
when the maintenance of a single boiler is carried out, the inner smoke baffle door 6 and the outer smoke baffle door 7 corresponding to the boiler are closed, the sealing fan 3 is started, air is blown into the space between the inner smoke baffle door 6 and the outer smoke baffle door 7, so that high pressure is generated between the inner smoke baffle door 6 and the outer smoke baffle door 7, and as the sealing problem possibly exists after the inner smoke baffle door 6 and the outer smoke baffle door 7 are closed, a small amount of blown sealing air can enter the induced draft fan 1 and the hearth from the inner smoke baffle door 6 and enter the flue 2 from the outer smoke baffle door 7, so that the flue gas in the flue 2 can be prevented from reversely entering the maintained hearth, and the safety of maintenance staff is ensured;
after entering the space between the inner smoke baffle door 6 and the outer smoke baffle door 7 through the sub-sealing pipe 8, sealing wind blown out by the sub-sealing pipe 8 close to the inner smoke baffle door 6 can enter the hearth, sealing wind blown out by the sub-sealing pipe 8 close to the outer smoke baffle door 7 can enter the flue 2, and enough pressure can be provided for one side respectively;
meanwhile, the air electric heater 4 can heat the sealing wind, so that the sealing wind expands due to temperature rise, the pressure of the sealing wind is ensured, and the failure of the sealing wind is effectively avoided.
A temperature sensor 10 is arranged at the exhaust port of the air electric heater 4, the signal output end of the temperature sensor 10 is electrically connected with the signal input end of the silicon controlled electric heating power regulator 11, and the signal output end of the silicon controlled electric heating power regulator 11 is electrically connected with the signal input end of the air electric heater 4; the temperature sensor 10 detects the temperature at the exhaust port of the air electric heater 4, and when the temperature sensor 10 detects that the temperature is lower than 75 ℃, the power of the air electric heater 4 is increased by the thyristor electric heating power regulator 11, so that the temperature of sealing wind is increased, and the pressure of the sealing wind is ensured; when the temperature sensor 10 detects that the temperature is higher than 85 ℃, the power of the air electric heater 4 is reduced by the silicon controlled rectifier electric heating power regulator 11, so that the temperature of sealing wind is reduced, and the operation of maintenance staff is prevented from being influenced by the fact that the temperature in a hearth is too high due to the fact that the temperature is too high.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (4)
1. The utility model provides a boiler overhauls flue isolation system, includes many induced fans, every the air intake of induced fan is connected with the exhaust port of a boiler, the air exit of induced fan is connected with the flue, the flue is connected with the chimney, its characterized in that still includes sealed fan, sealed fan's air exit is connected with air heater's air inlet, air heater gas vent respectively with the corresponding sealed tuber pipe of induced fan quantity be connected, every sealed tuber pipe is connected with the junction of corresponding induced fan and flue the flue with every interior flue baffle door and outer flue baffle door are installed to the junction of induced fan, interior flue baffle door with outer flue baffle door is arranged in respectively the front end and the rear end of sealed tuber pipe.
2. The boiler service flue isolation system of claim 1, wherein each sealing air duct is connected to two separate sealing pipes, each of which is correspondingly connected to the flue between the inner and outer flue damper doors and is adjacent to the opposite sides of the inner and outer flue damper doors.
3. A boiler service flue isolation system according to claim 2, wherein a seal damper is mounted to each of said split seal tubes.
4. A boiler overhaul flue isolation system according to any one of claims 1 to 3, wherein a temperature sensor is arranged at an exhaust port of the air electric heater, a signal output end of the temperature sensor is electrically connected with a signal input end of a silicon controlled rectifier electric heating power regulator, and a signal output end of the silicon controlled rectifier electric heating power regulator is electrically connected with a signal input end of the air electric heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321375090.3U CN219735357U (en) | 2023-05-30 | 2023-05-30 | Boiler overhauls flue isolation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321375090.3U CN219735357U (en) | 2023-05-30 | 2023-05-30 | Boiler overhauls flue isolation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219735357U true CN219735357U (en) | 2023-09-22 |
Family
ID=88058135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321375090.3U Active CN219735357U (en) | 2023-05-30 | 2023-05-30 | Boiler overhauls flue isolation system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219735357U (en) |
-
2023
- 2023-05-30 CN CN202321375090.3U patent/CN219735357U/en active Active
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