Cooling device for zinc barrel plating solution

Abstract

The utility model relates to a barrel-plating solution cooling device which comprises a barrel-plating tank (1) filled with a barrel-plating solution and an evaporative closed cooling tower (2), the barrel plating tank (1) is connected with a heat exchanger (7) of the closed cooling tower (2) through a liquid outlet pipeline (3) and a liquid return pipeline (4); a circulating pump (5) is arranged on the liquid outlet pipeline (3) and is used for conveying the zinc barrel plating solution into the heat exchanger (7) for heat exchange and cooling; an upturned U-shaped bent pipe (6) is arranged on the liquid return pipeline (4); and the top of the U-shaped bent pipe is connected with an automatic exhaust valve (8). The utility model has the advantages of simple structure, no crystal blockage, low maintenance cost and low energy consumption.

Description

Technical Field

[0001] This utility model relates to a cooling device for a barrel zinc plating solution, belonging to the field of barrel zinc plating technology. Background Technology

[0002] Barrel plating is a process in which a large number of small parts are placed in a rotating container for electroplating. Currently, in the barrel plating industry, the temperature of the plating solution must be less than 35 degrees Celsius according to process requirements. Therefore, barrel plating companies generally use air-cooled chillers to cool the plating solution to meet the process requirements.

[0003] Because the zinc plating solution is acidic and highly corrosive, the heat exchangers of existing air-cooled chillers are mostly made of titanium alloy, which is costly. Air can easily get into the zinc plating solution and react chemically with the metal ions in the solution, crystallizing and forming solid precipitates. When these precipitates accumulate, they can easily clog the cooling pipes, requiring frequent shutdowns for cleaning and maintenance, which is costly. In addition, air-cooled chillers have high energy consumption and there is considerable room for improvement.

[0004] Therefore, there is an urgent need for a cooling device for the zinc plating solution that is simple in structure, free from crystallization blockage, has low maintenance costs, and low energy consumption. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a cooling device for galvanizing solution that is simple in structure, free from crystallization blockage, low in maintenance cost, and low in energy consumption.

[0006] The purpose of this utility model is achieved as follows:

[0007] A cooling device for a barrel galvanizing solution includes a barrel galvanizing tank containing the solution and an evaporative closed-loop cooling tower. A liquid outlet pipe and a liquid return pipe connect the heat exchangers of the barrel galvanizing tank and the closed-loop cooling tower. A circulating pump is installed on the liquid outlet pipe to transport the galvanizing solution into the heat exchanger for heat exchange and cooling. An upward-curving U-shaped bend is installed on the liquid return pipe, and an automatic exhaust valve is connected to the top of the U-shaped bend.

[0008] Furthermore, the inlet of the liquid outlet pipe and the outlet of the liquid return pipe are both located at the bottom of the barrel plating tank.

[0009] Furthermore, the closed cooling tower is equipped with a heat exhaust fan at the top and a water storage tank at the bottom; a spray pipe and a water collector are provided between the heat exchanger and the heat exhaust fan.

[0010] Furthermore, multiple spray heads are installed at the bottom of the spray pipe, and the cooling water in the water storage tank is sprayed onto the surface of the heat exchanger by a spray pump.

[0011] Furthermore, both the liquid outlet line and the liquid return line are equipped with shut-off valves and thermometers; a check valve is installed on the liquid outlet line between the circulating pump and the heat exchanger.

[0012] Furthermore, a temperature sensor is installed inside the barrel plating tank, and it, along with the circulating pump, exhaust fan, and spray pump, are all connected to the control system.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This utility model adopts an evaporative closed-loop cooling tower to improve cooling effect and reduce operating costs. By setting an upward-curving U-shaped bend on the liquid outlet pipe of the cooling tower heat exchanger to collect the air in the cooling pipe, and installing an automatic exhaust valve at the top of the U-shaped bend to automatically discharge the air in the pipe, it avoids the plating solution from being in contact with the air for a long time and precipitating crystals, thus preventing blockage of the pipe and cooling equipment. The overall structure of the equipment is simple, with low maintenance cost and low energy consumption. Attached Figure Description

[0015] Figure 1 This is a connection principle diagram of a cooling device for a galvanizing solution in a barrel.

[0016] in:

[0017] 1. Barrel plating tank; 2. Closed cooling tower; 3. Liquid outlet pipe; 4. Liquid return pipe; 5. Circulating pump; 6. U-shaped bend; 7. Heat exchanger; 8. Automatic exhaust valve; 9. Check valve; 10. Exhaust fan; 11. Spray pipe; 12. Water collector; 13. Water storage tank; 14. Spray pump. Detailed Implementation

[0018] See Figure 1 This utility model relates to a cooling device for a zinc plating solution, comprising a zinc plating tank 1 containing the zinc plating solution and an evaporative closed-loop cooling tower 2; the heat exchanger 7 of the zinc plating tank 1 and the closed-loop cooling tower 2 are connected by an outlet pipe 3 and a return pipe 4; the inlet of the outlet pipe 3 and the outlet of the return pipe 4 are both located at the bottom of the zinc plating tank 1, immersing the inlet and outlet of the cooling pipes in the zinc plating solution, which can effectively reduce the mixing of air into the cooling pipe system and reduce crystallization and precipitation from the source; both the outlet pipe 3 and the return pipe 4 are equipped with shut-off valves and thermometers, and a check valve 9 is provided on the outlet pipe 3 between the circulating pump 5 and the heat exchanger 7 for convenient equipment inspection and maintenance;

[0019] A circulation pump 5 is installed on the liquid outlet pipe 3 to transport the galvanizing solution into the heat exchanger 7 for heat exchange and cooling; an upward-curving U-shaped bend 6 is installed on the liquid return pipe 4, and an automatic exhaust valve 8 is connected to the top of the U-shaped bend; air mixed in the cooling pipe reaches the top of the U-shaped bend 6 and is automatically vented periodically by the automatic exhaust valve 8, which realizes the purpose of automatic air discharge in the pipe, prevents crystal precipitation in the pipes and equipment of the cooling system, avoids blockage, reduces the frequency of cleaning and maintenance, and reduces maintenance costs;

[0020] The closed cooling tower 2 is equipped with a heat exhaust fan 10 at the top and a water storage tank 13 at the bottom. A spray pipe 11 and a water collector 12 are installed between the heat exchanger 7 and the heat exhaust fan 10. Multiple spray heads are installed at the bottom of the spray pipe 11. The cooling water in the water storage tank 13 is sprayed onto the surface of the heat exchanger 7 by the spray pump 14. The evaporation of the cooling water reduces the temperature of the heat exchanger 7 and the internal barrel plating solution. The evaporated cooling water is collected by the water collector 12 and drips back into the water storage tank for recycling. The heat exchange efficiency is high, and it is energy-saving and environmentally friendly. A temperature sensor is installed in the barrel plating tank 1. The sensor, along with the circulation pump 5, the heat exhaust fan 10, and the spray pump 14, is connected to the control system. The control system controls the operation of each part of the cooling system according to the temperature of the tank solution. The temperature control is more precise and the energy-saving effect is better.

[0021] Additionally, it should be noted that the above-described specific implementation is merely an optimized solution of this patent, and any modifications or improvements made by those skilled in the art based on the above concept are within the scope of protection of this patent.

Claims

1. A cooling device for a barrel zinc plating solution, comprising a barrel plating tank (1) containing a barrel zinc plating solution, characterized in that: It also includes an evaporative closed cooling tower (2), which is connected between the heat exchanger (7) of the barrel plating tank (1) and the closed cooling tower (2) through an outlet pipe (3) and a return pipe (4); a circulation pump (5) is provided on the outlet pipe (3) to transport the barrel plating solution into the heat exchanger (7) for heat exchange and cooling; an upward U-shaped bend (6) is provided on the return pipe (4), and an automatic exhaust valve (8) is connected to the top of the U-shaped bend.

2. The cooling device for the zinc plating solution according to claim 1, characterized in that: The inlet of the liquid outlet pipe (3) and the outlet of the liquid return pipe (4) are both located at the bottom of the barrel plating tank (1).

3. The cooling device for the zinc plating solution according to claim 1, characterized in that: The closed cooling tower (2) is equipped with a heat exhaust fan (10) at the top and a water storage tank (13) at the bottom; a spray pipe (11) and a water collector (12) are provided between the heat exchanger (7) and the heat exhaust fan (10).

4. The cooling device for the zinc plating solution according to claim 3, characterized in that: The bottom of the spray pipe (11) is equipped with multiple spray heads, and the cooling water in the water storage tank (13) is sprayed onto the surface of the heat exchanger (7) by the spray pump (14).

5. The cooling device for the zinc plating solution according to claim 1, characterized in that: Both the liquid outlet line (3) and the liquid return line (4) are equipped with shut-off valves and thermometers; a check valve (9) is provided on the liquid outlet line (3) between the circulating pump (5) and the heat exchanger (7).

6. The cooling device for the zinc plating solution according to claim 1, characterized in that: A temperature sensor is installed in the barrel plating tank (1), and it, along with the circulating pump (5), the exhaust fan (10), and the spray pump (14), are all connected to the control system.

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