CN210197801U - LNG cold energy is used for air cooling tower spray cooling's system - Google Patents
LNG cold energy is used for air cooling tower spray cooling's system Download PDFInfo
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- CN210197801U CN210197801U CN201921121165.9U CN201921121165U CN210197801U CN 210197801 U CN210197801 U CN 210197801U CN 201921121165 U CN201921121165 U CN 201921121165U CN 210197801 U CN210197801 U CN 210197801U
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Abstract
The utility model discloses a system for applying LNG cold energy to spray cooling of an air cooling tower, which comprises an LNG gasification system, an LNG cold energy utilization system and an air cooling tower spray cooling system; the LNG gasification system is arranged beside the LNG storage tank and connected with the LNG cold energy utilization system in a parallel connection mode, and comprises a high-pressure water bath type gasifier, wherein when the LNG cold energy is utilized, part of LNG enters the high-pressure water bath type gasifier to be gasified and then enters a gas turbine as fuel; the LNG cold energy utilization system recovers LNG gasified cold energy through the two-stage heat exchange system, the part of cold energy is used for reducing the temperature of outside water, and cooled cold water enters a spray water storage tank of the air cooling tower spray cooling system; the spray cooling system of the air cooling tower sends spray water in the spray water storage tank into the optimally arranged nozzles, and spray cooling is carried out, so that complete evaporation of spray is ensured, and an air cooling radiator in the air cooling tower is not corroded. The utility model is suitable for an use LNG as fuel, and use the combined cycle power plant of air cooling tower as cooling system.
Description
Technical Field
The utility model belongs to power station cooling system field, concretely relates to LNG cold energy is used for air cooling tower spray cooling's system, utilizes the LNG cold energy to improve the spray cooling ability of air cooling tower under summer high temperature condition.
Background
China is a country with serious water shortage. As industrialization, urbanization, and population continue to grow, the problem of water scarcity becomes more prominent. In a wet cooling tower, the cooling water directly transfers waste heat to air mainly by means of evaporative heat dissipation, which causes a large consumption of water resources. And in the air cooling tower, air and cooling water carry out the heat exchange through the air cooling radiator, and the cooling water transmits waste heat for the air through the mode of convective heat transfer, has avoided the water resource consumption that cooling water and air direct contact heat transfer caused. Thus, considering the water use limitation, the air cooling tower can become a very competitive choice.
However, one of the major problems faced by air cooling towers is: because the air and the cooling water exchange heat by convection heat exchange instead of evaporation heat dissipation, the heat exchange efficiency is inferior to that of a wet cooling tower. Especially, under the high temperature condition in summer, along with the rising of ambient air dry bulb temperature, air cooling tower heat transfer performance is showing and is descending, and the condenser pressure of the unit that uses the air cooling tower will show and increase, and the unit is exerted oneself and will descend by a wide margin, and is the peak period of resident's power consumption under the high temperature condition in summer again, consequently, improves the heat transfer performance of air cooling tower under the high temperature condition in summer, is great practical meaning to the economic profit of improvement unit.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a LNG cold energy is used for air cooling tower spray cooling's system to the lower problem of air cooling tower heat exchange efficiency under the high temperature condition in summer.
The utility model discloses a following technical scheme realizes:
a system for using LNG cold energy for spray cooling of an air cooling tower comprises an LNG gasification system, an LNG cold energy utilization system and the air cooling tower spray cooling system; wherein the content of the first and second substances,
the LNG cold energy utilization system is arranged beside the LNG storage tank and connected with the LNG cold energy utilization system in a parallel connection mode and comprises a high-pressure water bath type gasifier, wherein an outlet of the LNG storage tank is divided into two paths, one path is communicated to an inlet of the high-pressure water bath type gasifier, an outlet of the high-pressure water bath type gasifier is communicated to a gas turbine, the other path is communicated to an LNG inlet of the LNG cold energy utilization system, and an LNG outlet of the LNG cold energy utilization system is communicated to the gas turbine through an auxiliary heater;
when LNG cold energy is used, the high-pressure water bath type gasifier is used for gasifying part of LNG and then enters a gas turbine as fuel;
the LNG cold energy utilization system is used for recovering cold energy generated by gasifying the rest part of LNG through the two-stage heat exchange system, the cold energy is used for reducing the water temperature of outside water, and cooled cold water enters a spray water storage tank of the air cooling tower spray cooling system;
the air cooling tower spray cooling system is used for sending spray water in the spray water storage tank into a nozzle which is optimally arranged, and ensuring that spray is completely evaporated without corroding an air cooling radiator in an air cooling tower through spray cooling.
The utility model is further improved in that the two-stage heat exchange system of the LNG cold energy utilization system comprises a heat exchanger, a refrigerant storage tank and a refrigerant pump;
an LNG inlet and an LNG outlet are formed in a heat exchanger of the primary heat exchange system, a refrigerant storage tank outlet of the primary heat exchange system is communicated to a refrigerant inlet of a heat exchanger of the secondary heat exchange system through a refrigerant pump, a refrigerant outlet of the heat exchanger of the secondary heat exchange system is communicated to a refrigerant inlet of the heat exchanger of the primary heat exchange system, and a refrigerant outlet of the heat exchanger of the primary heat exchange system is communicated to a refrigerant storage tank inlet of the primary heat exchange system to form a heat exchange circulation loop;
an outlet of an external water storage tank of the secondary heat exchange system is communicated to a water inlet of a heat exchanger of the secondary heat exchange system, and a water outlet of the heat exchanger of the secondary heat exchange system is communicated to a spray water storage tank of the spray cooling system through a water pump of the secondary heat exchange system.
The utility model discloses further improvement lies in, and air cooling tower spray cooling system still includes the inside intercommunication water pipe of water pump and spray cooling system, and the inside intercommunication water pipe intercommunication of water pump and spray cooling system is passed through in the export of spraying water storage tank communicates to the nozzle.
The utility model discloses further improvement lies in, and the nozzle is arranged at the lower extreme of ring plate to keep away from the air cooling tower.
The utility model discloses further improvement lies in, wherein the ring plate is the level and arranges to hug closely the air cooling tower outer wall.
The utility model discloses further improvement lies in, and some nozzles adopt horizontal following current to arrange, partly adopt the adverse current to arrange and partly adopt the slope of 30 jiaos to arrange. The utility model discloses following profitable technological effect has:
LNG is a low-temperature liquid mixture formed by dehydrating and desulfurizing natural gas and freezing and liquefying the natural gas through a low-temperature process, and the temperature of the low-temperature liquid mixture is-162 ℃. LNG not only can regard as the fuel to use, simultaneously self carries a large amount of high-grade cold energy. The cold energy in the LNG vaporization process is up to about 830kJ/kg (including the latent heat of vaporization of the LNG and the sensible heat of warming to ambient temperature). At present, when the power station uses LNG as fuel, the LNG is generally required to be gasified and heated. In this process, the cold carried by the LNG is typically carried away by the external water. The LNG cold energy is recycled, so that the natural gas fuel is not consumed, additional environmental pollution is not generated, and good economic and social benefits are achieved.
The utility model provides a system for applying LNG cold energy to spray cooling of an air cooling tower, which comprises an LNG gasification system, an LNG cold energy utilization system and an air cooling tower spray cooling system; the LNG gasification system and the LNG cold energy utilization system are connected in parallel, and normal production of process equipment on the main pipeline is not influenced when the LNG cold energy utilization system does not operate; when an emergency occurs, the LNG flow of the LNG cold energy utilization system is reduced through the automatic control system, and the LNG gasifies the gasification system. The LNG cold energy utilization system recovers LNG gasified cold energy through the two-stage heat exchange system, the part of cold energy is used for reducing the temperature of outside water, and cooled cold water enters a spray water storage tank of the air cooling tower spray cooling system. The air cooling tower spray cooling system feeds spray water in a spray water storage tank into a nozzle which is optimally arranged. Through spray cooling, guarantee the complete evaporation of spraying promptly, do not corrode the air cooling radiator, greatly reduce the tower air temperature of advancing of air cooling tower again, promote the heat exchange efficiency of air cooling tower under summer high temperature condition.
To sum up, the utility model discloses compare with the air cooling tower spray cooling system who does not utilize the LNG cold energy, can utilize the LNG cold energy to utilize the system to retrieve the cold energy in the LNG gasification process under the high temperature condition in summer to a spraying temperature for reducing air cooling tower spray cooling system, and then showing the heat transfer effect who promotes between spraying water and air, further reducing the air dry bulb temperature that gets into the air cooling tower, showing the heat transfer performance who improves the tower.
Drawings
Fig. 1 is a schematic view of the overall system of the present invention.
Fig. 2 is a schematic diagram of an LNG cold energy utilization system.
Fig. 3 is a schematic diagram of an air cooling tower spray cooling system.
Fig. 4 is a schematic diagram of a nozzle arrangement of the air cooling tower spray cooling system.
Description of reference numerals:
1 is an LNG storage tank; 2 is a high-pressure water bath type gasifier; 3, an LNG cold energy utilization system; 3A is a heat exchanger of a primary heat exchange system; 3B is a refrigerant storage tank of the primary heat exchange system; 3C is a refrigerant pump of the primary heat exchange system; 3D is a heat exchanger of a secondary heat exchange system; 3E is a water pump of a secondary heat exchange system; 3F is an external water storage tank of the secondary heat exchange system; 4 is an auxiliary heater; 5 is a gas turbine; 7 is an air cooling tower spray cooling system; 7A is a communicating water pipe inside the spray cooling system; 7B is a circular ring plate; 7C is a nozzle; 7D is a water pump; 7E is a spray water storage tank; 8 is an air cooling radiator; and 9 is the outer wall of the air cooling tower.
Detailed Description
The invention will be described in detail with reference to the accompanying drawings and examples:
as shown in fig. 1, the utility model provides a pair of LNG cold energy is used for air cooling tower spray cooling's system, include:
and an LNG vaporization system disposed beside the LNG storage tank 1. This LNG gasification system and LNG cold energy utilization system 3 adopt the parallel connection mode to refute. When the LNG cold energy is used, a part of the LNG is gasified in the high pressure water bath gasifier 2 and then introduced into the gas turbine 5 as a fuel.
As shown in fig. 2, the LNG cold energy utilization system 3 includes a two-stage heat exchange system. Under the normal operation condition, the refrigerant in the refrigerant storage tank 3B of the primary heat exchange system enters the heat exchanger 3A of the primary heat exchange system through the refrigerant pump 3C of the primary heat exchange system to exchange heat with the LNG and cool, and then is sent into the heat exchanger 3D of the secondary heat exchange system. The heat-exchanged and heated LNG enters the auxiliary heater 4 to be heated, and then enters the gas turbine 5 as fuel. Water in an external water storage tank 3F of the secondary heat exchange system enters a heat exchanger 3D of the secondary heat exchange system through a water pump 3E of the secondary heat exchange system to exchange heat with a refrigerant, and enters a spray water storage tank 7E of the spray cooling system after being cooled; and the refrigerant after heat exchange and temperature rise enters the primary heat exchange system again for heat exchange circulation.
As shown in fig. 3, is an air cooling tower spray cooling system 7. The spray water from the spray water tank 7E passes through a water pump 7D and a communication water pipe 7A inside the spray cooling system, and enters the spray nozzle 7C. The nozzle 7C is arranged at the lower end of the circular ring plate 7B and is far away from the air cooling tower as far as possible so as to increase the running distance of water drops, enhance the cooling effect, ensure the water drops to be completely evaporated and not corrode the air cooling radiator 8. The circular plate 7B is horizontally arranged and clings to the outer wall 9 of the air cooling tower. As shown in fig. 4, some nozzles 7C are arranged in a horizontal forward flow manner, some nozzles are arranged in a reverse flow manner, and some nozzles are arranged in an inclined manner at an angle of 30 °, so that spray water is sprayed from the nozzles 7C to form spray, and the spray water is completely evaporated under the annular plate 7B, thereby preventing corrosion of the air-cooled radiator 8 and achieving a good cooling effect.
Compared with an air cooling tower spray cooling system which does not utilize LNG cold energy, the system can utilize the LNG cold energy to utilize the system 3 to recover the cold energy in the LNG gasification process under the high temperature condition in summer, and is used for reducing the spray water temperature of the air cooling tower spray cooling system 7, thereby obviously improving the heat exchange effect between the spray water and the air, further reducing the temperature of air dry balls entering the air cooling tower, and obviously improving the heat exchange performance of the tower.
Claims (6)
1. The system for applying LNG cold energy to spray cooling of the air cooling tower is characterized by comprising an LNG gasification system, an LNG cold energy utilization system (3) and an air cooling tower spray cooling system (7); wherein the content of the first and second substances,
the LNG gasification system is arranged beside the LNG storage tank (1) and connected with the LNG cold energy utilization system (3) in a parallel connection mode and comprises a high-pressure water bath type gasifier (2), the outlet of the LNG storage tank (1) is divided into two paths, one path of the LNG storage tank is communicated to the inlet of the high-pressure water bath type gasifier (2), the outlet of the high-pressure water bath type gasifier (2) is communicated to a gas turbine (5), the other path of the LNG storage tank is communicated to the LNG inlet of the LNG cold energy utilization system (3), and the LNG outlet of the LNG cold energy utilization system (3) is communicated to the gas turbine (5) through an auxiliary heater (4);
when LNG cold energy is utilized, the high-pressure water bath type gasifier (2) is used for gasifying part of LNG and then enters a gas turbine (5) as fuel;
the LNG cold energy utilization system (3) is used for recovering cold energy of the gasification of the rest LNG through the two-stage heat exchange system, the cold energy is used for reducing the water temperature of outside water, and cooled cold water enters a spray water storage tank (7E) of the air cooling tower spray cooling system (7);
and the air cooling tower spray cooling system (7) is used for sending spray water in the spray water storage tank (7E) into a nozzle (7C) which is optimally arranged, and ensuring that spray is completely evaporated without corroding an air cooling radiator (8) in the air cooling tower through spray cooling.
2. The system for using LNG cold energy for spray cooling of the air cooling tower as claimed in claim 1, wherein the two-stage heat exchange systems of the LNG cold energy utilization system (3) each comprise a heat exchanger, a refrigerant storage tank and a refrigerant pump;
an LNG inlet and an LNG outlet are arranged on a heat exchanger (3A) of the primary heat exchange system, an outlet of a refrigerant storage tank (3B) of the primary heat exchange system is communicated to a refrigerant inlet of a heat exchanger (3D) of the secondary heat exchange system through a refrigerant pump (3C), a refrigerant outlet of the heat exchanger (3D) of the secondary heat exchange system is communicated to a refrigerant inlet of the heat exchanger (3A) of the primary heat exchange system, and a refrigerant outlet of the heat exchanger (3A) of the primary heat exchange system is communicated to an inlet of the refrigerant storage tank (3B) of the primary heat exchange system to form a heat exchange circulation loop;
an outlet of an external water storage tank (3F) of the secondary heat exchange system is communicated to a water inlet of a heat exchanger (3D) of the secondary heat exchange system, and a water outlet of the heat exchanger (3D) of the secondary heat exchange system is communicated to a spray water storage tank (7E) of the spray cooling system through a water pump (3E) of the secondary heat exchange system.
3. The system for cooling the air cooling tower by spraying with LNG as described in claim 1, wherein the air cooling tower cooling system (7) further comprises a water pump (7D) and a communication water pipe (7A) inside the cooling system, and the outlet of the spray water storage tank (7E) is communicated to the nozzle (7C) through the water pump (7D) and the communication water pipe (7A) inside the cooling system.
4. A system for LNG cold energy for air cooling tower spray cooling according to claim 1 or 3, characterized in that the nozzles (7C) are arranged at the lower end of the annular plate (7B) and away from the air cooling tower.
5. System for LNG cold energy to be used for air cooling tower spray cooling according to claim 4, characterized in that the ring plate (7B) is arranged horizontally and is attached to the air cooling tower outer wall (9).
6. A system for LNG cold energy for air cooling tower spray cooling according to claim 1 or 3, characterized by partial nozzles (7C) in horizontal co-current arrangement, partial counter-current arrangement and partial 30 ° angle inclination arrangement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921121165.9U CN210197801U (en) | 2019-07-17 | 2019-07-17 | LNG cold energy is used for air cooling tower spray cooling's system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921121165.9U CN210197801U (en) | 2019-07-17 | 2019-07-17 | LNG cold energy is used for air cooling tower spray cooling's system |
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| CN210197801U true CN210197801U (en) | 2020-03-27 |
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| CN201921121165.9U Active CN210197801U (en) | 2019-07-17 | 2019-07-17 | LNG cold energy is used for air cooling tower spray cooling's system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110274416A (en) * | 2019-07-17 | 2019-09-24 | 西安热工研究院有限公司 | A kind of system that LNG cold energy is used for air cooling tower misting cooling |
| CN113883761A (en) * | 2021-11-10 | 2022-01-04 | 西安热工研究院有限公司 | LNG cold energy and solar energy-based combined cycle unit inlet air temperature regulation and control system and method |
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2019
- 2019-07-17 CN CN201921121165.9U patent/CN210197801U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110274416A (en) * | 2019-07-17 | 2019-09-24 | 西安热工研究院有限公司 | A kind of system that LNG cold energy is used for air cooling tower misting cooling |
| CN113883761A (en) * | 2021-11-10 | 2022-01-04 | 西安热工研究院有限公司 | LNG cold energy and solar energy-based combined cycle unit inlet air temperature regulation and control system and method |
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