Closed water circulation cooling device

Abstract

A closed type water circulation cooling device comprises a heat exchanger, a water outlet of the heat exchanger is respectively connected with radiating fins and a water collecting pool through a pipeline I, a water inlet of the heat exchanger is respectively connected with the radiating fins and the water collecting pool through a pipeline II, two radiating loops are formed, one is a radiating loop of the heat exchanger and the radiating fins, and the other is a radiating loop of the heat exchanger and the radiating fins. One is a heat exchanger and a water collecting tank heat dissipation loop; a three-way valve I is arranged in the middle of the pipeline I, a circulating water pump is arranged at one end of the pipeline II, a three-way valve II is arranged at the other end of the pipeline II, and a cleaning nozzle is arranged, so that cooling fins can be regularly or irregularly cleaned, the heat exchange performance of the cooling fins is ensured, and the cooling effect is ensured; the ventilator can be driven by photovoltaic power generation to assist or replace the air suction force of the cooling tower air duct, and the operation effect of the circulating water system can be improved on the basis that energy consumption is not increased.

Description

Technical Field

[0001] The utility model belongs to the technical field of circulating water cooling, and more specifically relates to a closed - type water circulation cooling device. Background Art

[0002] The circulating water cooling system is an important part of a power plant, directly affecting the efficiency of the generating unit. Usually, the waste heat or residual heat generated by the steam condenser in it is introduced into the environmental water body or the atmosphere by the circulating water cooling system, and the demand for fresh cooling water is very large.

[0003] The existing circulating water cooling system mainly consists of heat - dissipating equipment to be cooled, heat - exchange devices, circulating water pumps, collecting basins, spraying devices, reinforced concrete natural - draft cooling towers, and pipes connecting them. The circulating water from the heat - dissipating equipment to be cooled enters the natural - draft cooling tower through the water inlet pipe. Through the water - spraying device, heat exchange is carried out by the contact between water and air flow to generate steam for cooling. The cooling water enters the collecting basin, and then the circulating water pump sends the cooling water through the return pipe back into the heat - dissipating equipment for recycling. For example:

[0004] The invention patent with the patent number 201510419893.8 discloses a water - type closed - loop water - air cooling system and method. The reaction device is connected to the cooling sector at the bottom of the hyperbolic cooling tower through a circulating water pump. The other ends of the cooling sectors at the bottom are respectively connected to the aluminum - magnesium composite fins at the bottom of the tower and the aluminum - magnesium composite fins inside the tower. One of the water outlets of the cooling sector at the bottom of the tower is connected to the water inlet of the mixing water tank through a reversing valve, and the other is connected to the water inlet of the evaporator of the heat pump. The water outlet of the evaporator of the heat pump is connected to the mixing water tank, and finally the mixing water tank is connected to the reaction device; this invention uses a two - stage cooling technology for circulating water. The air cooling of the hyperbolic tower is the first - stage cooling, and the cooling temperature T2 is greatly affected by seasons and ambient air temperatures; the second - stage cooling is the cooling by the work of the heat pump, and the power of the heat pump compressor can be opened, closed or adjusted according to the change of the ambient air temperature, so as to adjust the return water temperature of the circulating water to the specified temperature of the reaction device. Although this invention adopts a closed - loop circulating water, a spraying device is still set during specific operation, still causing water waste and environmental pollution.

[0005] Currently, the circulating water cooling tower adopts an open - type structure, and mainly has the following problems: (1) The cooling tower uses natural ventilation for cooling. In hot summer, the air temperature is high, and it is difficult to ensure the cooling effect; (2) It causes evaporation loss of fresh cooling water and has a large water consumption; (3) The cooling water of the open - type cooling tower is directly in contact with the atmosphere, and it is easy to bring a large amount of impurities in the air into the circulating system, resulting in serious corrosion and scaling of the pipes. A large amount of chemical agents such as scale inhibitors and corrosion inhibitors have to be added, which is neither economical nor environmentally friendly; (4) The packing of the cooling tower is easily damaged, the operation and maintenance workload is large, and the maintenance cost is high. Summary of the Invention

[0006] To solve the above problems, the present utility model provides a closed - type water - circulation cooling device, which effectively solves the problems of water waste and environmental pollution, is convenient for operation and maintenance, and has low usage cost. The specific solution is as follows:

[0007] The described closed - type water - circulation cooling device includes a heat exchanger. The water outlet of the heat exchanger is respectively connected to a heat - dissipating fin and a sump through Pipeline I, and the water inlet of the heat exchanger is respectively connected to the heat - dissipating fin and the sump through Pipeline II, forming two heat - dissipation circuits. One is the heat - exchanger and heat - dissipating fin heat - dissipation circuit, and the other is the heat - exchanger and sump heat - dissipation circuit;

[0008] A three - way valve I is arranged in the middle of Pipeline I. One end of Pipeline II is provided with a circulating water pump, and the other end of Pipeline II is provided with a three - way valve II;

[0009] The A end of the three - way valve I is connected to the heat exchanger, and the A end of the three - way valve II is connected to the heat exchanger through the circulating water pump; the B end of the three - way valve I is connected to the heat - dissipating fin, and the B end of the three - way valve II is connected to the heat - dissipating fin, together with the heat exchanger, forming the heat - exchanger and heat - dissipating fin heat - dissipation circuit;

[0010] The C end of the three - way valve I is connected to the sump, and the C end of the three - way valve II is connected to the sump, together with the heat exchanger, forming the heat - exchanger and sump heat - dissipation circuit;

[0011] The heat - dissipating fin is arranged at the lower end of the cooling air tower. The cooling air tower is set as a frustum - shaped hollow structure with a smaller upper part and a larger lower part. The heat - dissipating fin is cooled by the natural air extraction of the cooling air tower. The lower end of the cooling air tower is provided with wind - tower supports. The heat - dissipating fin is arranged outside the wind - tower supports and has the same height as the wind - tower supports. Protection nets are arranged at the upper end and around the heat - dissipating fin;

[0012] A water - replenishing well is arranged at the middle position of the bottom end of the cooling air tower. A sump is arranged on one side of the water - replenishing well. A cleaning nozzle is arranged at the upper end of the water - replenishing well, which can effectively clean the dust on the heat - dissipating fin;

[0013] A photovoltaic power generation panel is arranged on the sunny side of the cooling air tower. The photovoltaic power generation panel is connected to a storage battery through an inverter. The storage battery is connected to a cooling fan, and the air outlet of the cooling fan is aligned with the heat - dissipating fin;

[0014] The positive effects of the present utility model are as follows: The present utility model is provided with heat - dissipating fins, and uses circulating water and air to conduct heat exchange through the contact of the heat - dissipating fins, thereby realizing the indirect cooling of the circulating water and forming a closed - loop of the circulating cold - water system. This not only avoids the evaporation loss of fresh water, reduces the loss of circulating water, but also prevents impurities in the atmosphere from being brought into the circulating water system to pollute the water quality. Furthermore, it saves costs and reduces secondary pollution, having extensive economic value and practical value.

[0015] A cleaning nozzle is provided, which can clean the heat dissipation fins regularly or irregularly to ensure the heat exchange performance of the heat dissipation fins and guarantee the heat dissipation effect.

[0016] A photovoltaic power generation panel is provided. Using photovoltaic power generation can drive the ventilator to assist or replace the air suction force of the cooling tower chimney, and can improve the operation effect of the circulating water system without increasing energy consumption. Brief Description of the Drawings

[0017] Appendix Figure 1 is a schematic structural diagram of the present utility model;

[0018] Appendix Figure 2 is a schematic structural diagram at the heat exchanger of the present utility model; In the drawings:

[0019] 1. Heat exchanger, 2. Pipeline Ⅰ, 3. Three-way valve Ⅰ, 4. Cooling wind tower, 5. Cleaning nozzle, 6. Photovoltaic power generation panel, 7. Protection net, 8. Heat dissipation fins, 9. Wind tower support, 10. Make-up well, 11. Sump, 12. Three-way valve Ⅱ, 13. Pipeline Ⅱ, 14. Circulating water pump. Detailed Description of the Preferred Embodiment

[0020] Combined with Appendix Figure 1 、 2 The present utility model will be further described in detail below so that the public can better master the implementation method of the present utility model. The specific implementation scheme of the present utility model is as follows:

[0021] The closed-circuit water circulation cooling device includes a heat exchanger 1. The water outlet of the heat exchanger 1 is respectively connected to the heat dissipation fins 8 and the sump 11 through the pipeline Ⅰ 2, and the water inlet of the heat exchanger 1 is respectively connected to the heat dissipation fins 8 and the sump 11 through the pipeline Ⅱ 13, forming two heat dissipation circuits. One is the heat dissipation circuit of the heat exchanger 1 and the heat dissipation fins 8, that is, the heat dissipation fins 8 heat dissipation circuit, and the other is the heat dissipation circuit of the heat exchanger 1 and the sump 11, that is, the sump 11 heat dissipation circuit; The two heat dissipation circuits can be used independently or jointly, which is convenient for maintenance and repair, and can effectively improve the heat utilization efficiency.

[0022] A three-way valve Ⅰ 3 is provided in the middle of the pipeline Ⅰ 2, a circulating water pump 14 is provided at one end of the pipeline Ⅱ 13, and a three-way valve Ⅱ 12 is provided at the other end of the pipeline Ⅱ 13;

[0023] The A end of the three-way valve Ⅰ3 is connected to the water outlet of the heat exchanger 1, and the A end of the three-way valve Ⅱ12 is connected to the water inlet of the heat exchanger 1 through the circulation water pump 14; the B end of the three-way valve Ⅰ3 is connected to the water inlet of the heat dissipation fin 8, and the B end of the three-way valve Ⅱ12 is connected to the water outlet of the heat dissipation fin 8, forming a heat dissipation loop for the heat exchanger 1 and the heat dissipation fin 8; the heat exchanger 1 converts the heat of the heat dissipation equipment into hot water, which enters the heat dissipation fin 8 through the B end of the three-way valve Ⅰ3 via the pipeline Ⅰ2. The hot water of the heat dissipation fin 8 is converted into cold water after air cooling. The cold water enters the heat exchanger 1 through the B end of the three-way valve Ⅱ12 via the circulation water pump 14, completing the heat dissipation cycle of the heat exchanger 1 and the heat dissipation fin 8;

[0024] The C end of the three-way valve Ⅰ3 is connected to the water inlet of the sump 11, and the C end of the three-way valve Ⅱ12 is connected to the water outlet of the sump 11, forming a heat dissipation loop for the heat exchanger 1 and the sump 11; the heat exchanger 1 converts the heat of the heat dissipation equipment into hot water, which enters the sump 11 through the C end of the three-way valve Ⅰ3 via the pipeline Ⅰ2. The hot water of the sump 11 is converted into cold water after cooling. The cold water enters the heat exchanger 1 through the C end of the three-way valve Ⅱ12 via the circulation water pump 14, completing the heat dissipation cycle of the heat exchanger 1 and the sump 11;

[0025] The heat dissipation fin 8 is arranged at the lower end of the cooling wind tower 4. The cooling wind tower 4 is arranged as a frustum-shaped hollow structure with a smaller upper part and a larger lower part. The heat dissipation fin 8 is cooled by the natural draft of the cooling wind tower 4. The lower end of the cooling wind tower 4 is provided with a wind tower support 9. The heat dissipation fin 8 is arranged outside the wind tower support 9 and has the same height as the wind tower support 9. The natural wind passes through the heat dissipation fin 8 and is drawn into the high altitude by the cooling wind tower 4, taking away the heat of the heat dissipation fin 8 and completing the heat dissipation of the heat dissipation fin 8; protective nets 7 are arranged at the upper end and around the heat dissipation fin 8, which can effectively protect the heat dissipation fin 8 and ensure its normal operation;

[0026] A water replenishing well 10 is arranged at the middle position of the bottom end of the cooling wind tower 4. When the water consumption of the heat dissipation fin 8 and the sump 11 is large, it can effectively replenish the water to ensure the heat dissipation effect; a sump 11 is arranged on one side of the water replenishing well 10, and a cleaning nozzle 5 is arranged at the upper end of the water replenishing well 10. The cleaning nozzle 5 is aligned with the heat dissipation fin 8, which can effectively clean the dust on the heat dissipation fin 8;

[0027] A photovoltaic power generation panel 6 is arranged on the sunny side of the cooling wind tower 4. The photovoltaic power generation panel 6 is connected to a storage battery through an inverter. The storage battery is connected to a cold air blower, and the air outlet of the cold air blower is aligned with the heat dissipation fin 8; it assists the cooling wind tower 4 to dissipate heat from the heat dissipation fin 8;

[0028] Working principle:

[0029] The front end of the heat exchanger 1 is connected with a heat dissipation device. When heat dissipation is required, the heat dissipation circuits of the heat exchanger 1 and the heat dissipation fins 8 or the heat dissipation circuits of the heat exchanger 1 and the water collecting pool 11 can be used separately, or the two can be combined for heat dissipation;

[0030] Heat dissipation circuit of the heat dissipation fins 8: The heat exchanger 1 converts the heat of the heat dissipation device into hot water, which enters the heat dissipation fins 8 through the B end of the three-way valve Ⅰ3 via the pipeline Ⅰ2. The hot water of the heat dissipation fins 8 is converted into cold water after air cooling. The cold water enters the heat exchanger 1 through the B end of the three-way valve Ⅱ12 via the circulating water pump 14. The cold water further absorbs the heat of the heat dissipation device in the heat exchanger 1 to complete the heat dissipation cycle;

[0031] Heat dissipation circuit of the water collecting pool 11: The heat exchanger 1 converts the heat of the heat dissipation device into hot water, which enters the water collecting pool 11 through the C end of the three-way valve Ⅰ3 via the pipeline Ⅰ2. The hot water of the water collecting pool 11 is converted into cold water after cooling. The cold water enters the heat exchanger 1 through the C end of the three-way valve Ⅱ12 via the circulating water pump 14. The cold water further absorbs the heat of the heat dissipation device in the heat exchanger 1 to complete the heat dissipation cycle.

Claims

1. A closed water circulation cooling device, comprising a heat exchanger (1), characterized in that: The water outlet of the heat exchanger (1) is connected to the heat dissipation fins (8) and the water collecting tank (11) respectively through the pipe I (2), and the water inlet of the heat exchanger (1) is connected to the heat dissipation fins (8) and the water collecting tank (11) respectively through the pipe II (13), so as to form two heat dissipation circuits, one of which is the heat dissipation circuit between the heat exchanger (1) and the heat dissipation fins (8), i.e. the heat dissipation circuit between the heat exchanger (1) and the water collecting tank (11), i.e. the heat dissipation circuit between the water collecting tank (11); A three-way valve I (3) is provided in the middle of the pipeline I (2), a circulating water pump (14) is provided at one end of the pipeline II (13), and a three-way valve II (12) is provided at the other end of the pipeline II (13); The A end of the three-way valve I (3) is connected to the water outlet of the heat exchanger (1), and the A end of the three-way valve II (12) is connected to the water inlet of the heat exchanger (1) via a circulating water pump (14); the B end of the three-way valve I (3) is connected to the water inlet of the heat dissipation fin (8), and the B end of the three-way valve II (12) is connected to the water outlet of the heat dissipation fin (8), thereby forming a heat dissipation circuit of the heat exchanger (1) and the heat dissipation fin (8).

2. The closed water circulation cooling device according to claim 1, characterized in that: The C end of the three-way valve I (3) is connected to the water inlet of the water collecting tank (11), and the C end of the three-way valve II (12) is connected to the water outlet of the water collecting tank (11), thereby forming a heat dissipation circuit of the heat exchanger (1) and the water collecting tank (11).

3. The closed water circulation cooling device according to claim 1, characterized in that: The heat dissipation fins (8) are arranged at the lower end of the cooling wind tower (4); the cooling wind tower (4) is arranged as a truncated cone-shaped hollow structure that is small at the top and large at the bottom; the heat dissipation fins (8) are cooled by natural air extraction from the cooling wind tower (4); a wind tower support (9) is arranged at the lower end of the cooling wind tower (4); the heat dissipation fins (8) are arranged outside the wind tower support (9) and have the same height as the wind tower support (9); and protective nets (7) are arranged at the upper end and around the sides of the heat dissipation fins (8).

4. The closed water circulation cooling device according to claim 3, characterized in that: A water replenishment well (10) is provided at the middle position of the bottom end of the cooling wind tower (4), a water collecting pool (11) is provided on one side of the water replenishment well (10), and a cleaning nozzle (5) is provided at the upper end of the water replenishment well (10).

5. The closed water circulation cooling device according to claim 4, characterized in that: A photovoltaic power generation panel (6) is provided on the sun-facing side of the cooling wind tower (4); the photovoltaic power generation panel (6) is connected to an energy storage battery via an inverter; the energy storage battery is connected to an air cooler; and the air outlet of the air cooler is aligned with the heat dissipation fins (8).

Images