Dry and wet dual-purpose composite closed cooling tower

Abstract

The utility model discloses a dry and wet dual-purpose composite closed cooling tower which comprises a cooling tower main body, a finned tube bundle and a cooling coil which are arranged up and down are arranged in the cooling tower main body, a connecting tube is arranged at the side part of the cooling tower main body, and an inlet tube and an outlet tube of the finned tube bundle and an inlet tube and an outlet tube of the cooling coil are connected with the connecting tube; wafer butterfly valves are mounted on an inlet pipe and an outlet pipe of the finned tube bundle, and wafer butterfly valves are mounted on an inlet pipe and an outlet pipe of the cooling coil; a wafer butterfly valve is mounted at the upper part of the connecting pipe and is positioned between an inlet and an outlet of the finned tube bundle; a wafer butterfly valve is installed on the lower portion of the connecting pipe and located between an inlet and an outlet of the cooling coil pipe. According to the cooling tower provided by the utility model, dry operation or wet operation can be switched at any time, a proper operation mode can be determined according to the water outlet temperature, and water and electricity are saved; the finned tube bundle or the cooling coil can be conveniently maintained, and system operation is not affected in the maintenance process.

Description

Technical Field

[0001] The utility model relates to a dry-wet dual-purpose composite closed cooling tower, belonging to the technical field of cooling towers. Background Art

[0002] Closed cooling tower, also known as closed cooling tower for short, is a tower that places a tubular heat exchanger inside the tower. It sprays water onto the surface of the heat exchange tube to evaporate and exchange heat to achieve the purpose of cooling. Because it is a closed cycle, it can ensure that the water quality is not polluted, which well protects the efficient operation of the main equipment and increases its service life.

[0003] The dry-wet dual-purpose composite closed cooling tower in the prior art is equipped with a fan, a fin tube bundle, a water collector, a spray system, a cooling coil, an air inlet grille and a water collection tank from top to bottom. During operation, the medium flows through the fin tube bundle, flows into the cooling coil through the connecting pipe between the fin tube bundle and the cooling coil, and finally flows out from the cooling coil outlet, running continuously. If there is a leak in the fin tube bundle or the cooling coil, it will cause the entire equipment to shut down, affecting the normal operation of the equipment. The operating mode of the existing dry-wet dual-purpose composite closed cooling tower is not convenient for convenient switching according to the outlet temperature, which is not conducive to saving water and electricity.

[0004] In summary, the prior art obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0005] In view of the deficiencies in the background technology, the utility model provides a dry-wet dual-purpose composite closed cooling tower, which can realize switching between dry operation and wet operation at any time, and can determine the appropriate operation mode according to the outlet water temperature to save water and electricity; it can facilitate the maintenance of fin tube bundles or cooling coils, and the maintenance process does not affect the operation of the system.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A dry-wet dual-purpose composite closed cooling tower comprises a cooling tower body, wherein a fin tube bundle and a cooling coil are installed in the cooling tower body;

[0008] A connecting pipe is provided on the side of the cooling tower body, and the inlet pipe and outlet pipe of the fin tube bundle and the inlet pipe and outlet pipe of the cooling coil are all connected to the connecting pipe;

[0009] The inlet pipe and the outlet pipe of the fin tube bundle are both equipped with a wafer butterfly valve, and the inlet pipe and the outlet pipe of the cooling coil are both equipped with a wafer butterfly valve;

[0010] A wafer butterfly valve is installed on the upper part of the connecting pipe, and the wafer butterfly valve is located between the inlet and outlet of the fin tube bundle; a wafer butterfly valve is installed on the lower part of the connecting pipe, and the wafer butterfly valve is located between the inlet and outlet of the cooling coil.

[0011] Furthermore, a fan is installed on the top of the cooling tower body.

[0012] Furthermore, a water collector and a spray device are installed in sequence from top to bottom between the fin tube bundle and the cooling coil.

[0013] Furthermore, a water collecting tank is provided at the bottom of the cooling tower body, and an air inlet louver is installed on the side wall above the water collecting tank.

[0014] Furthermore, the bottom of the inner cavity of the water collecting tank is connected to the spray device through a pipeline, and a spray pump is installed on the pipeline.

[0015] Furthermore, a medium inlet is provided on one side of the top end of the connecting pipe, and a medium outlet is provided on one side of the bottom end of the connecting pipe.

[0016] Furthermore, an air release valve is installed above the inlet pipe of the fin tube bundle and the cooling coil.

[0017] Furthermore, a drain valve is installed below the outlet pipe of the fin tube bundle and the cooling coil.

[0018] Compared with the prior art, the utility model has the following advantages after adopting the above technical solution:

[0019] The cooling tower of the utility model can switch between dry operation and wet operation at any time, and both dry and wet operation can be operated independently. The operation mode to be adopted can be determined according to the outlet water temperature, so as to save water and electricity.

[0020] If there is a leak in the finned tube bundle or cooling coil, you can switch to a finned tube bundle or cooling coil without a leak, and perform a short-term repair on the finned tube bundle or cooling coil with a leak. The repair process does not affect the system operation.

[0021] When the machine is shut down for maintenance, the circulating water circulates through the connecting pipe, and the water in the fin tube bundle and cooling coil is drained through the drain valve. This method can also prevent the cooling coil from freezing in winter.

[0022] The utility model is described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the utility model;

[0024] Figure 2 It is a connection diagram of the connecting pipe.

[0025] In the figure, 1-fan, 2-fin tube bundle, 3-water collector, 4-spray device, 5-cooling coil, 6-air inlet louver, 7-water collecting tank, 8-connecting pipe, 9-wafer butterfly valve a, 10-wafer butterfly valve b, 11-wafer butterfly valve c, 12-wafer butterfly valve d, 13-wafer butterfly valve e, 14-wafer butterfly valve f, 15-air release valve, 16-drain valve, 17-medium inlet, 18-medium outlet. DETAILED DESCRIPTION

[0026] In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation methods of the utility model are now described with reference to the accompanying drawings.

[0027] like Figure 1 and Figure 2 As shown together, the utility model provides a dry-wet dual-purpose composite closed cooling tower, including a cooling tower body, wherein a fin tube bundle 2 and a cooling coil 5 arranged up and down are installed inside the cooling tower body.

[0028] A fan 1 is installed on the top of the cooling tower body.

[0029] A water collector 3 and a spray device 4 are installed in sequence from top to bottom between the fin tube bundle 2 and the cooling coil 5 .

[0030] A water collecting box 7 is provided at the bottom of the cooling tower body, and an air inlet louver 6 is installed on the side wall above the water collecting box 7.

[0031] The bottom of the inner cavity of the water collecting box 7 is connected to the spraying device 4 through a pipeline, and a spraying pump is installed on the pipeline.

[0032] A connecting pipe 8 is provided on the side of the cooling tower body, and the inlet pipe and the outlet pipe of the fin tube bundle 2 and the inlet pipe and the outlet pipe of the cooling coil 5 are all connected to the connecting pipe 8 .

[0033] A wafer butterfly valve a9 is installed on the inlet pipe of the fin tube bundle 2, and a wafer butterfly valve b10 is installed on the outlet pipe of the fin tube bundle 2.

[0034] A wafer butterfly valve c11 is installed on the inlet pipe of the cooling coil 5 , and a wafer butterfly valve d12 is installed on the outlet pipe of the cooling coil 5 .

[0035] A wafer butterfly valve e13 is installed on the upper part of the connecting pipe 8 , and the wafer butterfly valve e13 is located between the inlet and outlet of the fin tube bundle 2 .

[0036] A wafer butterfly valve f14 is installed at the lower part of the connecting pipe 8 , and the wafer butterfly valve f14 is located between the inlet and outlet of the cooling coil 5 .

[0037] A medium inlet 17 is provided at one side of the top end of the connecting pipe 8 , and a medium outlet 18 is provided at one side of the bottom end of the connecting pipe 8 .

[0038] An air release valve 15 is installed above the inlet pipe of the fin tube bundle 2 and the cooling coil 5, and a drain valve 16 is installed below the outlet pipe of the fin tube bundle 2 and the cooling coil 5.

[0039] The specific working principle of this utility model:

[0040] When the wafer butterfly valves a, b, c, d are in the open state, and the wafer butterfly valves e and f are in the closed state, the fin tube bundle, cooling coil and spray device are all in operation, and the dry and wet operations are synchronized;

[0041] When the wafer butterfly valves a9, b10, and f14 are in the open state, and the wafer butterfly valves c11, d12, and e13 are in the closed state, the fin tube bundle is in operation, and the spray device and the cooling coil are in the stopped state, which is dry operation. At this time, the cooling coil can be maintained and repaired for a short period of time, and this state can be operated for a long time in winter;

[0042] When the wafer butterfly valves c11, d12, and e13 are in the open state, and the wafer butterfly valves a9, b10, and f14 are in the closed state, the cooling coil and the spray device are in operation, and the fin tube bundle is in the stopped state, which belongs to wet operation. At this time, the fin tube bundle can be maintained and repaired for a short period of time;

[0043] When the wafer butterfly valves a9, b10, c11, and d12 are closed, and the wafer butterfly valves e13 and f14 are open, the finned tube bundle and the cooling coil are not involved in the operation and can be overhauled as a whole. The circulating water circulates through the connecting pipe and the water in the finned tube bundle and the cooling coil is drained through the drain valve. This method can also prevent ice from forming in the cooling coil in winter. There are 4 operating modes, which can be switched according to actual needs.

[0044] The cooling tower of the utility model can switch between dry operation and wet operation at any time, and can operate independently. The operating mode can be determined according to the outlet water temperature to save water and electricity. If there is a leak in the finned tube bundle or cooling coil, it can be switched to a finned tube bundle or cooling coil without a leak, and the finned tube bundle or cooling coil with a leak can be repaired for a short period of time without affecting the operation of the system. When shutting down for maintenance, the finned tube bundle and the cooling coil can be cut off, and the circulating water can be circulated through the connecting pipe, and the water in the finned tube bundle and the cooling coil can be drained through the drain valve. This method can also prevent ice from forming in the cooling coil in winter.

[0045] The above is an example of the best implementation of the utility model, and the parts not described in detail are common knowledge of ordinary technicians in this field. The protection scope of the utility model is based on the content of the claims, and any equivalent transformation based on the technical inspiration of the utility model is also within the protection scope of the utility model.

Claims

1. A dry and wet dual-purpose composite closed cooling tower, characterized in that: It comprises a cooling tower body, inside which a fin tube bundle (2) and a cooling coil (5) arranged vertically are installed; A connecting pipe (8) is provided on the side of the cooling tower body, and the inlet pipe and outlet pipe of the fin tube bundle (2) and the inlet pipe and outlet pipe of the cooling coil (5) are all connected to the connecting pipe (8); The inlet pipe and the outlet pipe of the fin tube bundle (2) are both equipped with wafer butterfly valves, and the inlet pipe and the outlet pipe of the cooling coil (5) are both equipped with wafer butterfly valves; A wafer butterfly valve is installed on the upper part of the connecting pipe (8), and the wafer butterfly valve is located between the inlet and outlet of the fin tube bundle (2); a wafer butterfly valve is installed on the lower part of the connecting pipe (8), and the wafer butterfly valve is located between the inlet and outlet of the cooling coil (5).

2. A dry-wet dual-purpose composite closed cooling tower as claimed in claim 1, characterized in that: A fan (1) is installed on the top of the cooling tower body.

3. A dry-wet dual-purpose composite closed cooling tower as claimed in claim 2, characterized in that: A water collector (3) and a spray device (4) are installed in sequence from top to bottom between the fin tube bundle (2) and the cooling coil (5).

4. A dry-wet dual-purpose composite closed cooling tower as claimed in claim 3, characterized in that: A water collecting box (7) is provided at the bottom of the cooling tower body, and an air inlet louver (6) is installed on the side wall above the water collecting box (7).

5. A dry-wet dual-purpose composite closed cooling tower as claimed in claim 4, characterized in that: The bottom of the inner cavity of the water collecting tank (7) is connected to the spraying device (4) via a pipeline, and a spraying pump is installed on the pipeline.

6. A dry-wet dual-purpose composite closed cooling tower as claimed in claim 1, characterized in that: A medium inlet (17) is provided on one side of the top end of the connecting pipe (8), and a medium outlet (18) is provided on one side of the bottom end of the connecting pipe (8).

7. A dry-wet dual-purpose composite closed cooling tower as claimed in claim 1, characterized in that: An air release valve (15) is installed above the inlet pipe of the fin tube bundle (2) and the cooling coil (5).

8. A dry-wet dual-purpose composite closed cooling tower as claimed in claim 7, characterized in that: A drain valve (16) is installed below the outlet pipe of the fin tube bundle (2) and the cooling coil (5).

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