CN210862285U - Anti-freezing device for auxiliary circulating water system of photo-thermal power station - Google Patents
Anti-freezing device for auxiliary circulating water system of photo-thermal power station Download PDFInfo
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- CN210862285U CN210862285U CN201921830108.8U CN201921830108U CN210862285U CN 210862285 U CN210862285 U CN 210862285U CN 201921830108 U CN201921830108 U CN 201921830108U CN 210862285 U CN210862285 U CN 210862285U
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Abstract
The utility model relates to an anti-freezing device for a circulating water system of an auxiliary machine of a photo-thermal power station, which comprises a mechanical ventilation indirect air cooling tower, a photo-thermal power station auxiliary machine and an air cooling radiator arranged in the mechanical ventilation indirect air cooling tower; a shell-and-tube heat exchanger is arranged outside the mechanical ventilation indirect air cooling tower, a circulating water pipeline is arranged between the shell-and-tube heat exchanger and the air cooling radiator, circulating liquid in the circulating water pipeline is anti-freezing liquid, and an industrial water pipeline is arranged between the shell-and-tube heat exchanger and the photo-thermal power station auxiliary machine. Adopt the utility model discloses can solve the frostproofing problem that light and heat power station auxiliary engine circulating water system filled water winter, greatly reduced air cooling radiator equipment accident rate improves the reliability of light and heat power station operation, and light and heat power station auxiliary engine system no longer need adopt frequently to fill drainage antifreeze measures winter simultaneously, the maintenance operation work load of lowering system.
Description
Technical Field
The utility model belongs to the technical field of the solar photothermal power generation, concretely relates to solar and thermal power plant auxiliary engine circulating water system's freeze-proof device.
Background
The principle of solar photo-thermal power generation is that sunlight is converged to a solar collecting device through a reflector, a heat transfer medium (fused salt or heat transfer oil) in the solar collecting device is heated by the solar energy, and then high-temperature high-pressure steam generated by heat exchange of an evaporator drives a steam turbine to generate power.
The solar radiation value directly determines the economic efficiency of a photo-thermal power station, and the solar photo-thermal power stations planned and established in China at present mainly concentrate on northwest areas such as Hami, Guermu, Yumen, Delaha and the like, and the areas are mainly characterized by high solar radiation value, wide available land, serious water shortage and low extreme environmental temperature. In order to solve the problem of water shortage, an indirect air cooling system is often adopted for cooling auxiliary machines of the photothermal power station.
Influenced by solar radiation and photo-thermal energy storage time, the photo-thermal power station generally needs to be started and stopped every day. Traditional indirect air cooling circulating water system of auxiliary engine when light and heat power plant shut down winter for no longer the heat transfer, so the air cooling radiator does not have the heat source, based on preventing frostbite and considering, generally with the system evacuation, fills water to the system again during the start-up, brings very big difficulty for the operation.
The traditional circulating water system for the auxiliary machines of the photothermal power station mainly adopts primary circulating heat exchange, and as shown in figure 1, a circulating medium is demineralized water. Most of photo-thermal projects in China are arranged in northwest regions, the extremely low temperature of the environment in winter is lower, taking Hami as an example, the temperature can reach-32 ℃, the temperature of the finned tube of the cold radiator can reach below-20 ℃ when an auxiliary air cooling system is filled with water, and water filling freezing and tube explosion are easy to occur, so that the system is forced to stop running and other accidents.
SUMMERY OF THE UTILITY MODEL
The utility model provides a technical problem lie in providing a reliable auxiliary engine circulating water system frost protection scheme in winter promptly, solve the frostproofing difficult problem of operation in winter of the cold district light and heat power station in northwest of china.
The technical means adopted by the utility model are as follows.
The utility model provides an anti-freezing device for a circulating water system of an auxiliary machine of a photo-thermal power station, which comprises a mechanical ventilation indirect air cooling tower, a photo-thermal power station auxiliary machine and an air cooling radiator arranged in the mechanical ventilation indirect air cooling tower, wherein a heat exchanger is arranged outside the mechanical ventilation indirect air cooling tower; a circulating water pipeline is arranged between the heat exchanger and the air-cooled radiator, and circulating liquid in the circulating water pipeline is antifreeze; and an industrial water pipeline is arranged between the heat exchanger and the photo-thermal power station auxiliary machine.
And a branch water pipe is connected in parallel with the circulating water pipeline at the water outlet of the air-cooled radiator, and an anti-freezing liquid underground storage tank and a water filling pump are arranged on the branch water pipe.
The heat exchanger is arranged in a plant, and the freezing point of the antifreeze is lower than-35 ℃.
And the circulating water pipeline is provided with a circulating water pump, and the industrial water pipeline is provided with an industrial water pump.
And a valve is arranged on the branch water pipe at the water inlet of the anti-freezing liquid underground storage tank.
According to the above technical means, the utility model discloses produced technological effect: the problem of preventing frostbite of filling water winter of auxiliary engine circulating water system of the photothermal power station can be solved, the accident rate of air cooling radiator equipment is greatly reduced, the reliability of the operation of the photothermal power station is improved, meanwhile, frequent water filling and draining anti-freezing measures are not needed to be adopted in the photothermal power station auxiliary engine system in winter, and the maintenance operation workload of the system is reduced. On the other hand, the utility model discloses freeze-proof device's application is wide, can be applied to in all indirect air cooling systems that have the requirement of preventing frostbite.
Drawings
Fig. 1 is a schematic view of an auxiliary circulation system of a conventional photothermal power station.
Fig. 2 is a schematic structural diagram of an embodiment of the anti-freezing device of the auxiliary circulating water system of the photo-thermal power station.
Detailed Description
The utility model discloses light and heat power station auxiliary engine circulating water system's freeze-proof device mainly adopts the secondary cycle heat transfer, as shown in FIG. 2, it does the utility model discloses the schematic structure diagram of an embodiment of freeze-proof device.
In the embodiment, the anti-freezing device of the auxiliary machine circulating water system of the photothermal power station comprises a mechanical ventilation indirect air cooling tower 1, the photothermal power station auxiliary machine 3 and an air cooling radiator 2 arranged in the mechanical ventilation indirect air cooling tower 1; a shell-and-tube heat exchanger 4 is arranged outside the mechanical ventilation indirect air cooling tower 1, a circulating water pipeline 5 is arranged between the shell-and-tube heat exchanger 4 and the air cooling radiator 2, circulating liquid in the circulating water pipeline 5 is anti-freezing liquid, and an industrial water pipeline 7 is arranged between the shell-and-tube heat exchanger 4 and the photo-thermal power station auxiliary machine 3. Meanwhile, the shell-and-tube heat exchanger 4 is arranged in a factory building, a circulating water pump 6 is arranged on the circulating water pipeline 5, and an industrial water pump 8 is arranged on the industrial water pipeline 7. In addition, the shell-and-tube heat exchanger can be replaced by other types of heat exchangers, such as a double-tube heat exchanger.
The freezing point of the antifreeze in the circulating water pipeline 5 is generally lower than-35 ℃, and different antifreeze media can be selected according to the requirement of the freezing point. For example: the 50% volume fraction glycol aqueous solution is used as the antifreeze, the freezing point is-38 ℃, the specific heat is 3.28kJ/kg. ℃, the circulation flow (mass flow) of the glycol aqueous solution with the same heat dissipation capacity is about 1.28 times of that of the demineralized water adopted by the traditional air cooling system, the total power of a water pump of the cooling system is increased to a certain extent, and meanwhile, the area of the air cooling radiator 2 is increased by about 30%.
In the present embodiment, a branch pipe 9 is connected in parallel to the circulating water pipe 5 at the water outlet 22 of the air-cooled radiator 2, an underground antifreeze tank 10 and a water filling pump 11 are provided on the branch pipe 9, and a valve 12 is provided on the branch pipe 9 at the water inlet of the underground antifreeze tank 10.
As described above, in this embodiment, the circulating cooling medium between the mechanical draft indirect air cooling tower 1 and the main plant shell-and-tube heat exchanger 4 adopts the antifreeze, so as to lower the freezing point, and prevent the pipeline equipment outside the main plant from freezing at low temperature, thereby meeting the operation requirement; meanwhile, the circulating cooling medium between the main plant inner shell-and-tube heat exchanger 4 and the photothermal power station auxiliary machine 3 still adopts desalted water, and the operation requirement of the auxiliary machine equipment can be met.
Claims (6)
1. The anti-freezing device of the auxiliary machine circulating water system of the photothermal power station comprises a mechanical ventilation indirect air cooling tower (1), the photothermal power station auxiliary machine (3) and an air cooling radiator (2) arranged in the mechanical ventilation indirect air cooling tower (1), and is characterized in that,
a heat exchanger (4) is arranged outside the mechanical ventilation indirect air cooling tower (1);
a circulating water pipeline (5) is arranged between the heat exchanger (4) and the air-cooled radiator (2), and circulating liquid in the circulating water pipeline (5) is antifreeze;
an industrial water pipeline (7) is arranged between the heat exchanger (4) and the photo-thermal power station auxiliary machine (3).
2. The anti-freezing device for the circulating water system of the auxiliary machinery of the photothermal power station as defined in claim 1, wherein a branch pipe (9) is connected in parallel to the circulating water pipe (5) at the water outlet (21) of the air-cooled radiator (2), and an anti-freezing liquid underground tank (10) and a water-filled pump (11) are provided on the branch pipe (9).
3. The anti-freezing device for the circulating water system of the auxiliary machinery of the photothermal power station as defined in claim 1, wherein the heat exchanger (4) is disposed in a factory building.
4. The antifreeze apparatus for an auxiliary circulating water system of a photothermal power station as set forth in claim 1 or 2, wherein said antifreeze has a freezing point of less than-35 ℃.
5. The anti-freezing device for the circulating water system of the auxiliary machine of the photothermal power station as defined in claim 1, wherein a circulating water pump (6) is provided on the circulating water pipe (5), and an industrial water pump (8) is provided on the industrial water pipe (7).
6. The antifreeze apparatus for an auxiliary circulating water system of a photothermal power station as defined in claim 2, wherein a valve (12) is provided on the branch pipe (9) at the water inlet of said antifreeze underground tank (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921830108.8U CN210862285U (en) | 2019-10-28 | 2019-10-28 | Anti-freezing device for auxiliary circulating water system of photo-thermal power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921830108.8U CN210862285U (en) | 2019-10-28 | 2019-10-28 | Anti-freezing device for auxiliary circulating water system of photo-thermal power station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210862285U true CN210862285U (en) | 2020-06-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921830108.8U Active CN210862285U (en) | 2019-10-28 | 2019-10-28 | Anti-freezing device for auxiliary circulating water system of photo-thermal power station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210862285U (en) |
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2019
- 2019-10-28 CN CN201921830108.8U patent/CN210862285U/en active Active
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