CN215491159U

CN215491159U - Anti-freezing equipment for diversion of direct air cooling island of power plant

Info

Publication number: CN215491159U
Application number: CN202122110165.2U
Authority: CN
Inventors: 窦军官; 仝林林; 夏雪峰
Original assignee: Dou Junguan
Current assignee: Dou Junguan
Priority date: 2021-09-02
Filing date: 2021-09-02
Publication date: 2022-01-11
Anticipated expiration: 2031-09-02

Abstract

The utility model relates to the technical field of power plant unit cooling, in particular to a flow guide anti-freezing device for a direct air cooling island of a power plant, which comprises an air cooling room, wherein a plurality of supporting frames are fixedly arranged on the inner side of the air cooling room, positioning seats are fixedly arranged at the tops of the supporting frames, a plurality of steam distribution pipes are fixedly arranged among the positioning seats, a heat conduction plate is fixedly arranged at the bottom end of the inner side of the air cooling room, the top ends of the heat conduction plates are attached to the steam distribution pipes, a plurality of radiating fins are fixedly arranged on the side walls of the heat conduction plates, the radiating fins are uniformly distributed on the corresponding heat conduction plates, an exhaust passage is fixedly arranged at the outlet end of the air cooling room, and a flow guide mechanism is arranged at the outlet end of the exhaust passage. The utility model can avoid the problem of freezing loss of the condenser caused by over-low internal temperature of the air cooling room, and has strong practicability.

Description

Anti-freezing equipment for diversion of direct air cooling island of power plant

Technical Field

The utility model relates to the technical field of power plant unit cooling, in particular to a diversion anti-freezing device for a direct air cooling island of a power plant.

Background

Compared with the traditional wet-cooling thermal power generating unit, the water consumption can be saved by adopting the direct air cooling mode of the air cooling island, and the problems of plant address and capacity scale by water and the like do not exist, so that the water-deficient water generating unit is gradually the mainstream in northern water-deficient areas of China; the direct air cooling mode takes ambient air as a cooling medium of steam exhaust of the steam turbine, the ambient air is directly heated after passing through a condenser of the air cooling island, and because a negative pressure zone is formed at an inlet at the bottom of the air cooling island when the fan works, part of the heated ambient air can be sucked to the inlet of the fan to form a hot air backflow phenomenon, so that the heat exchange efficiency of the unit is reduced, even the backpressure of the steam turbine is rapidly increased, and the safe operation of the unit is threatened; the prevention and control measures adopted by each power plant at present are generally to build wind-break walls around an air cooling platform, so that an obvious effect is achieved;

air cooling power stations in China are mostly built in areas with cold climate, large temperature difference all year round and day and night. In northern cold winter, the low temperature can cause the condenser to be frozen in a large area and even to be frozen to cause accidents, the heat preservation method adopted by the power plant at present is to cover a cotton blanket on the outer surface of a radiator for heat preservation, or to plug the cotton blanket in an air duct of an air inlet of a fan to weaken the air circulation; due to the large space of the air cooling island, the method has the problems of high labor intensity and easy blowing of the cotton blanket, and is difficult to achieve a good heat preservation effect.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the defect that a good heat preservation effect is difficult to achieve in the prior art, and provides a diversion anti-freezing device for a direct air cooling island of a power plant.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the design one kind power plant's direct air cooling island water conservancy diversion equipment of preventing frostbite, including the air cooling room, the inboard fixed mounting in air cooling room has a plurality of support frames, and is a plurality of the top fixed mounting of support frame has a positioning seat, and is a plurality of fixed mounting has a plurality of steam distribution pipes between the positioning seat, the inboard bottom fixed mounting in air cooling room has a heat-conducting plate, and is a plurality of the top and the steam distribution pipe laminating of heat-conducting plate are a plurality of fixed mounting has a plurality of radiating fin on the lateral wall of heat-conducting plate, and is a plurality of radiating fin evenly distributed is on corresponding heat-conducting plate, the exit end fixed mounting in air cooling room has exhaust passage, drainage mechanism is installed to exhaust passage's exit end.

Preferably, a plurality of guide plates are fixedly mounted at the top end of the inner side of the air cooling room, and the guide plates are distributed along the length direction of the air cooling room at equal intervals.

Preferably, the drainage mechanism comprises a drainage cylinder, the drainage cylinder is fixedly installed at the outlet end of the exhaust passage, a motor support is fixedly installed inside the drainage cylinder, a motor is fixedly installed on the motor support, and an axial-flow impeller is fixedly installed on an output shaft of the motor.

Preferably, an exhaust pipe and a return pipe are fixedly mounted on the outer side of the top end of the drainage cylinder, and the outlet end of the return pipe is communicated with the inside of the air cooling room.

Preferably, a first control valve is fixedly mounted on the exhaust pipe, and a second control valve is fixedly mounted on the return pipe.

The utility model provides a diversion anti-freezing device for a direct air cooling island of a power plant, which has the beneficial effects that: the axial flow impeller is driven by the motor to rotate at a high speed, so that negative pressure eddy current is generated in the drainage cylinder, and hot air in the air cooling room is quickly guided into the drainage cylinder to realize cooling; when the environmental temperature rises, the first control valve is opened, the second control valve is closed, and the hot air in the drainage cylinder is discharged through the exhaust pipe; when the ambient temperature reduces, close first control valve, open the second control valve, hot-blast in the drainage cylinder passes through the back flow and leads to the formation internal heat circulation in the air cooling room again to avoid the inside temperature of air cooling room to hang down the problem that leads to the condenser to freeze and decrease.

Drawings

FIG. 1 is a schematic structural diagram of a diversion and anti-freezing device for a direct air cooling island of a power plant, which is provided by the utility model;

FIG. 2 is a cross-sectional view of a diversion and anti-freezing device of a direct air cooling island of a power plant, which is provided by the utility model;

fig. 3 is a schematic structural diagram of a drainage mechanism of a diversion and anti-freezing device of a direct air cooling island of a power plant.

In the figure: the air cooling system comprises an air cooling room 1, a support frame 2, a positioning seat 3, a steam distribution pipe 4, a heat conducting plate 5, a radiating fin 6, an exhaust passage 7, a flow guiding mechanism 8, a flow guiding cylinder 81, a motor support 82, a motor 83, an axial flow impeller 84, an exhaust pipe 85, a first control valve 86, a return pipe 87, a second control valve 88 and a guide plate 9.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-3, the flow guide anti-freezing equipment for the direct air cooling island of the power plant comprises an air cooling room 1, wherein a plurality of supporting frames 2 are fixedly installed on the inner side of the air cooling room 1, positioning seats 3 are fixedly installed at the tops of the supporting frames 2, a plurality of steam distribution pipes 4 are fixedly installed among the positioning seats 3, and the positioning seats 3 are used for positioning and installing the steam distribution pipes 4; the bottom end of the inner side of the air cooling room 1 is fixedly provided with a heat conducting plate 5, and the heat conducting plate 5 is used for absorbing and transferring heat of hot air; the top ends of the heat-conducting plates 5 are attached to the steam distribution pipe 4, the side walls of the heat-conducting plates 5 are fixedly provided with a plurality of radiating fins 6, the radiating fins 6 are uniformly distributed on the corresponding heat-conducting plates 5, and the radiating fins 6 can absorb and disperse the heat of hot air, so that quick cooling is realized; an exhaust passage 7 is fixedly arranged at the outlet end of the air cooling room 1; a plurality of guide plates 9 are fixedly mounted at the top end of the inner side of the air cooling room 1, and the guide plates 9 are distributed along the length direction of the air cooling room 1 at equal intervals. The guide plate 9 is used for guiding hot air, and then guiding the hot air out through the exhaust passage 7, so that the air cooling room 1 is cooled rapidly.

The outlet end of the exhaust passage 7 is provided with a drainage mechanism 8, the drainage mechanism 8 comprises a drainage cylinder 81, the drainage cylinder 81 is fixedly arranged at the outlet end of the exhaust passage 7, a motor support 82 is fixedly arranged in the drainage cylinder 81, a motor 83 is fixedly arranged on the motor support 82, an output shaft of the motor 83 is fixedly provided with an axial-flow impeller 84, and the motor 83 is used for driving the axial-flow impeller 84 to rotate at a high speed; an exhaust pipe 85 and a return pipe 87 are fixedly installed on the outer side of the top end of the drainage cylinder 81, the outlet end of the return pipe 87 is communicated with the interior of the air cooling room 1, a first control valve 86 is fixedly installed on the exhaust pipe 85, and a second control valve 88 is fixedly installed on the return pipe 87.

The motor 83 drives the axial flow impeller 84 to rotate at a high speed, so that negative pressure vortex is generated in the drainage cylinder 81, and hot air in the air cooling room 1 is quickly guided into the drainage cylinder 81 to realize cooling; when the ambient temperature rises, the first control valve 86 is opened, the second control valve 88 is closed, and the hot air in the drainage cylinder 81 is discharged through the exhaust pipe 85; when the ambient temperature is reduced, the first control valve 86 is closed, the second control valve 88 is opened, and the hot air in the drainage cylinder 81 is reintroduced into the air cooling room 1 through the return pipe 87 to form internal heat circulation, so that the problem of freezing loss of the condenser caused by too low internal temperature of the air cooling room 1 is avoided.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.

Claims

1. A diversion anti-freezing device of a direct air cooling island of a power plant comprises an air cooling room (1) and is characterized in that, a plurality of supporting frames (2) are fixedly arranged on the inner side of the air cooling room (1), positioning seats (3) are fixedly arranged on the tops of the supporting frames (2), a plurality of steam distribution pipes (4) are fixedly arranged among the positioning seats (3), the bottom end of the inner side of the air cooling room (1) is fixedly provided with a heat conducting plate (5), the top ends of the heat conducting plates (5) are attached to the steam distribution pipe (4), the side walls of the heat conducting plates (5) are fixedly provided with a plurality of radiating fins (6), the radiating fins (6) are uniformly distributed on the corresponding heat conducting plates (5), an exhaust passage (7) is fixedly arranged at the outlet end of the air cooling room (1), and a drainage mechanism (8) is installed at the outlet end of the exhaust channel (7).

2. The diversion anti-freezing equipment for the direct air cooling island of the power plant according to claim 1, wherein a plurality of diversion plates (9) are fixedly installed at the top end of the inner side of the air cooling room (1), and the diversion plates (9) are equidistantly distributed along the length direction of the air cooling room (1).

3. The power plant direct air cooling island flow guide anti-freezing equipment according to claim 1, wherein the flow guide mechanism (8) comprises a flow guide cylinder (81), the flow guide cylinder (81) is fixedly installed at an outlet end of the exhaust passage (7), a motor support (82) is fixedly installed inside the flow guide cylinder (81), a motor (83) is fixedly installed on the motor support (82), and an axial flow impeller (84) is fixedly installed on an output shaft of the motor (83).

4. A power plant direct air cooling island flow guide anti-freezing device according to claim 3, characterized in that an exhaust pipe (85) and a return pipe (87) are fixedly installed on the outer side of the top end of the flow guide cylinder (81), and the outlet end of the return pipe (87) is communicated with the inside of the air cooling room (1).

5. A power plant direct air cooling island diversion anti-freezing equipment according to claim 4, characterized in that a first control valve (86) is fixedly installed on the exhaust pipe (85), and a second control valve (88) is fixedly installed on the return pipe (87).