Negative pressure evaporation plating solution cooler

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The evaporation of the plating solution cooler on the aeration plate is solved by evaporating the plating solution temperature and high energy consumption during the electroplating hard chromium plating process, and efficient cooling of the plating solution and reducing the discharge of heavy metal wastewater is achieved. .

CN222274773UActive Publication Date: 2024-12-31SHANDONG JUKE METAL PROCESSING CO LTD

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Patent Information

Application Number: CN202421047142.9
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-05-14
Publication Date: 2024-12-31
Estimated Expiration: 2034-05-14

AI Technical Summary

Technical Problem

The increase in the plating solution temperature during the electroplating hard chromium plating leads to high energy consumption. The existing cooling methods have problems with heavy metal wastewater discharge and power consumption of high-power refrigerators.

Method used

Design a negative pressure evaporated liquid plating cooler, which can set the spray pipe, drain pipe, air inlet pipe and air outlet pipe through the hollow shell. The plating liquid evaporates and cools on the aeration plate to achieve cooling, and regulates the pressure Tubes and refrigerators optimize cooling efficiency.

Benefits of technology

It reduces the energy consumption and heavy metal wastewater discharge in the electroplating process, reduces the use of freezers, achieves efficient cooling of the plating solution, saves electricity and reduces heavy metal emissions.

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Abstract

The utility model discloses a negative pressure evaporation plating solution cooler which comprises a shell, a spraying pipe, a liquid discharge pipe, an air inlet pipe and an air outlet pipe are respectively arranged on the shell, the spraying pipe and the liquid discharge pipe are respectively communicated with a plating bath, the shell is connected in series in an air draft pipeline, and the air inlet pipe and the air outlet pipe are respectively communicated with the air draft pipeline; a bracket and a plurality of aeration plates mounted on the bracket up and down are arranged in the shell, and the spraying pipes are suspended above the aeration plates. When in use, a plating solution in the plating bath is pumped out and fed into the spraying pipe, and then is sprayed out from the spraying pipe to the aeration plate, and as the plating solution cooling device is connected in series on an air draft pipeline, the interior of the shell is in a negative pressure state, moisture in the plating solution is evaporated on the aeration plate, the temperature of the plating solution is reduced, and the plating solution is cooled; and the cooled plating solution is discharged from the liquid discharge pipe and finally returns to the plating tank. Therefore, the plating solution cooling device not only can cool the plating solution, but also reduces the energy consumption for cooling the plating solution, and meets the actual use requirements.

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Description

Technical Field

[0001] The utility model relates to the technical field of plating liquid cooling, in particular to a negative pressure evaporation plating liquid cooler. Background Art

[0002] Hard chrome electroplating is an indispensable surface treatment process for manufacturing various large-scale equipment in the process of industrial modernization. However, the current efficiency of hard chrome electroplating is very low. In recent decades, many scientific and technological workers have worked hard to develop many hard chrome additives to improve the efficiency of hard chrome electroplating. However, the highest current efficiency is only about 25%, and the remaining 75% is consumed in the circuit to generate heat and electrolyze water in the plating solution. This causes the plating solution temperature to continue to rise during the hard chrome electroplating process. The optimal process temperature of the hard chrome electroplating process is 55-60°C. Therefore, how to cool the plating solution has become a problem that technical personnel in the field must deal with.

[0003] There are generally two types of cooling for hard chrome plating solution: natural cooling and forced cooling. Natural cooling is slow, resulting in inability to produce continuously. It is still used in small factories or workshops with few production tasks. In today's era of pursuit of high efficiency, most manufacturers are using forced cooling, which is divided into cooling inside the circulating cold water plating tank and cooling outside the circulating plating tank.

[0004] Cooling in a circulating cold water tank is to spray the hot water from the heat exchanger in the plating tank through a spray tower, and use a high-power cooling fan on the spray tower. The spray cooling effect is related to the air temperature, and the overall cooling effect is not as good as using a chiller, especially when electroplating requires a large current, and even more so when working for a long time. Therefore, most units that use the cooling process in a circulating cold water tank use chillers to cool down in order to maintain the relative stability of the plating solution temperature during the production process. Using a chiller requires a high-power refrigerator, which consumes more energy.

[0005] Cooling the circulating plating solution outside the plating tank is to cool the plating solution that needs to be cooled down through the heat exchanger of the chiller and then flow it back into the plating tank. It also uses a chiller and requires a high-power refrigerator.

[0006] In summary, no matter it is cooling inside a circulating cold water plating tank or cooling outside a circulating plating solution tank, serpentine titanium tubes are usually used as heat exchangers, and the corrosion rate of metallic titanium in chrome plating solution is very low. Theoretically, there is no environmental risk. However, in the actual electroplating production process, it is often due to quality problems of the purchased titanium tubes or unexpected reasons such as the titanium tubes being connected in series with the anode, which may cause perforation of the titanium tubes or cracks in the welds, thus causing environmental accidents in which chrome plating solution enters the cooling circulation system. Moreover, no matter it is the cooling process inside a circulating cold water plating tank or the cooling process outside a circulating plating solution tank, a high-power refrigerator is used, which consumes a lot of electricity. Utility Model Content

[0007] In view of the above-mentioned deficiencies, the technical problem to be solved by the utility model is to provide a negative pressure evaporation plating liquid cooler, which not only solves the energy consumption problem in the hard chrome electroplating process, but also greatly reduces the discharge of heavy metal wastewater in the electroplating process while cooling the plating liquid.

[0008] In order to solve the above technical problems, the technical solution of the utility model is:

[0009] A negative pressure evaporative plating liquid cooler comprises a hollow shell, on which a spray pipe, a drain pipe, an air inlet pipe and an air outlet pipe are respectively arranged, the spray pipe is connected to the liquid outlet of the aqueduct, the drain pipe is connected to the liquid inlet of the plating tank, the shell is serially connected in an exhaust pipeline, and the air inlet pipe and the air outlet pipe are respectively connected to the exhaust pipeline; a bracket and a plurality of aeration plates installed up and down on the bracket are arranged in the shell, and the spray pipe is suspended above the aeration plate.

[0010] Preferably, a mist shield is further provided in the shell, the mist shield is vertically arranged, and the mist shield is located on the air outlet side.

[0011] Preferably, a pressure regulating tube is further provided on the shell, and the pressure regulating tube is provided close to the top end of the shell, and the pressure regulating tube is used to adjust the pressure in the shell.

[0012] Preferably, a drain pipe is provided at the bottom of the shell.

[0013] Preferably, an overflow pipe is further provided on the shell, the top end of the overflow pipe is located below the air inlet pipe, and the bottom end of the overflow pipe is connected to the drain pipe.

[0014] Preferably, a refrigerator is provided at the bottom of the shell.

[0015] Preferably, the inlet of the spray pipe is connected to the outlet of the pump through a pipeline, and the inlet of the pump is connected to the liquid outlet of the plating tank.

[0016] Preferably, the shell is made of UPVC material.

[0017] Preferably, the pipe and the pump housing are made of UPVC or PVDF material.

[0018] Preferably, the volume of the shell is set according to the volume of the plating tank.

[0019] After adopting the above technical solution, the beneficial effects of the utility model are:

[0020] The negative pressure evaporation plating liquid cooler of the utility model includes a hollow shell, a spray pipe, a drain pipe, an air inlet pipe and an air outlet pipe are respectively arranged on the shell, the spray pipe and the drain pipe are respectively connected to the plating tank, the shell is connected in series in the exhaust pipe, and the air inlet pipe and the air outlet pipe are respectively connected to the exhaust pipe; a bracket and a plurality of aeration plates installed up and down on the bracket are arranged in the shell, and the spray pipe is suspended above the aeration plate. In actual use, the plating liquid in the plating tank is extracted and sent into the spray pipe, and then sprayed from the spray pipe and sprayed onto the aeration plate. Since the utility model is connected in series to the exhaust pipe, the inside of the shell is in a negative pressure state, and the water in the plating liquid is evaporated on the aeration plate, so that the temperature of the plating liquid is reduced, thereby realizing the cooling of the plating liquid. The cooled plating liquid is then discharged from the drain pipe and finally returns to the plating tank. It can be seen that the negative pressure evaporation plating liquid cooler of the utility model can not only cool the plating liquid, but also reduce the energy consumption of plating liquid cooling, thus meeting the actual use requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the negative pressure evaporation plating liquid cooler in the utility model;

[0022] Figure 2 It is a top view of the negative pressure evaporation plating liquid cooler in the utility model;

[0023] Figure 3 This is a bottom view of the negative pressure evaporation plating liquid cooler in the utility model;

[0024] In the figure: 1-shell, 2-spray pipe, 3-bracket, 4-aeration plate, 5-air inlet pipe, 6-overflow pipe, 8-pressure regulating pipe, 9-air outlet pipe, 10-refrigerator, 11-drain pipe, 12-drain pipe. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0026] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside", and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0027] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0028] like Figure 1 , Figure 2 and Figure 3 As shown, a negative pressure evaporation plating liquid cooler comprises a hollow shell 1, the volume of the shell 1 is set according to the volume of the plating tank to ensure reliable cooling of the plating liquid; a spray pipe 2, a drain pipe 11, an air inlet pipe 5 and an air outlet pipe 9 are respectively arranged on the shell 1, the spray pipe 2 is connected to the liquid outlet of the aqueduct, specifically, the inlet of the spray pipe 2 is connected to the outlet of the pump through a pipeline, the inlet of the pump is connected to the liquid outlet of the plating tank, the drain pipe 11 is connected to the liquid inlet of the plating tank, the shell 1 is connected in series with the exhaust pipeline, the air inlet pipe 5 and the air outlet pipe 9 are respectively connected to the exhaust pipeline, specifically, the exhaust pipeline is disconnected, and the shell 1 is installed at the disconnection point, at this time, the air inlet pipe 5 and the exhaust pipeline are connected. The air outlet at the disconnection is connected, and the air outlet pipe 9 is connected to the air inlet disconnected from the exhaust duct, so that the utility model is connected in series in the exhaust duct; a bracket 3 and a plurality of aeration plates 4 installed up and down on the bracket 3 are arranged in the shell 1, and the spray pipe 2 is suspended above the aeration plate 4. This structural arrangement allows the plating liquid in the spray pipe 2 to be sprayed out from the liquid spray port on the spray pipe 2, fall onto the aeration plate 4 below, and then gradually slide down from the aeration plate 4, and the water content of the plating liquid is evaporated in the process of sliding down, and the evaporated water is taken away by the wind flowing in the exhaust duct to remove heat, thereby reducing the temperature of the plating liquid and achieving the purpose of cooling the plating liquid, and no heavy metal wastewater is discharged.

[0029] like Figure 1 As shown, in this embodiment, a mist shield is also provided in the shell 1. The mist shield is vertically arranged and is located at the air outlet side. Specifically, in front of the outlet of the air outlet pipe 9, the mist shield can prevent the chrome water droplets from being carried away by the exhaust airflow.

[0030] like Figure 1 As shown, a pressure regulating tube 8 is also provided on the shell 1. The pressure regulating tube 8 is provided near the top of the shell 1. The pressure regulating tube 8 is used to adjust the pressure inside the shell 1. The negative pressure inside the shell 1 can be adjusted by the pressure regulating tube 8 to ensure that the water in the plating solution is reliably evaporated and the heat is taken away.

[0031] like Figure 1 , Figure 2 and Figure 3As shown, the bottom of the housing 1 of the utility model is provided with a drain pipe 12 and an overflow pipe 6, the top of the overflow pipe 6 is located below the air inlet pipe 5, and the bottom of the overflow pipe 6 is connected to the drain pipe 12; the overflow pipe 6 can prevent the liquid level of the plating solution in the housing 1 from being higher than the pipe opening of the air inlet pipe 5, and prevent the plating solution from flowing into the air inlet pipe 5. The setting of the drain pipe 1 ensures that the plating solution in the housing 1 is drained when maintenance is performed.

[0032] like Figure 1 As shown, a refrigerator is provided at the bottom of the housing 1 of the utility model. When the evaporation degree of the plating solution is insufficient and the plating solution cannot be cooled, the refrigerator is started to ensure cooling of the plating solution. In addition, the refrigerator is made of metal titanium plate material, which is convenient for heat transfer to facilitate natural heat dissipation of the plating solution.

[0033] The housing 1 of the utility model is made of UPVC material so as to be welded with the exhaust pipe. The housing 1 of the pipe and the pump is made of UPVC or PVDF material to prevent corrosion by the plating solution and ensure the service life.

[0034] like Figure 1 , Figure 2 and Figure 3 As shown, when the utility model is used, it is usually placed on the main exhaust duct near the plating tank. When the temperature in the plating tank rises to the limit value, the pump is started to extract the plating liquid in the plating tank and send it to the spray pipe 2, and then sprayed from the spray pipe 2 to the aeration plate 4 in the shell 1. Because the utility model is installed on the exhaust duct, the interior of the shell 1 is in a negative pressure state, so that the water in the plating liquid is evaporated on the aeration plate 4, and the water in the plating liquid that evaporates the water is taken away by the wind. The heat of the water is reduced, thereby achieving the cooling of the plating liquid. The cooled plating liquid is finally discharged from the drain pipe 11, and under the action of the pump, it finally returns to the plating tank. It can be seen that the negative pressure evaporation plating liquid cooler of the utility model can not only cool the plating liquid, but also reduce the energy consumption of plating liquid cooling, meeting the actual use needs.

[0035] The beneficial effects of the utility model include energy saving and emission reduction. The energy saving refers to that a hard chrome electroplating tank with 15 cubic meters of liquid is generally equipped with a 5.5KW refrigerator to cool the electroplating tank liquid. After using the new cooler, the 5.5KW refrigerator is directly saved. Calculated based on 20 hours of work per day and 25 days per month, 33,000 degrees of electricity can be saved each year. Since the cooler adopts the process of evaporating water to cool the plating liquid, as the temperature drops, the water in the plating liquid evaporates faster and needs to be continuously replenished. Therefore, the most concentrated first cleaning water can be continuously added to the plating tank or the workpiece can be directly sprayed and washed when the product comes out of the tank, and most of the chrome plating liquid can be recovered, thereby reducing the emission of heavy metal chromium and saving the consumption of chromic anhydride, the main raw material for hard chrome electroplating.

[0036] The emission reduction effect refers to the calculation based on a hard chrome electroplating tank with 15 cubic meters of solution. The chromic acid anhydride can be reduced by about 8 kg per day, and the original chromium-containing wastewater of more than 300 mg / L can be reduced to less than 1 mg / L, which can reduce the wastewater discharge by about 26 tons per day. Calculated based on 25 working days per month, 2.4 tons of chromic acid anhydride can be saved each year, and the emission of heavy metal hexavalent chromium can be reduced by 2.4 tons, and the annual wastewater discharge can be reduced by 7,800 tons.

[0037] The above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications made within the spirit and principle of the present invention, improvements of the negative pressure evaporation plating liquid cooler, etc., should be included in the protection scope of the present invention.

Claims

1. Negative pressure evaporation plating liquid cooler, characterized in that: It comprises a hollow shell, on which a spray pipe, a liquid discharge pipe, an air inlet pipe and an air outlet pipe are respectively arranged, the spray pipe is connected with the liquid outlet of the plating tank, the liquid discharge pipe is connected with the liquid inlet of the plating tank, the shell is connected in series in an exhaust pipeline, and the air inlet pipe and the air outlet pipe are respectively connected with the exhaust pipeline; A bracket and a plurality of aeration plates installed up and down on the bracket are arranged in the shell, and the spray pipe is suspended above the aeration plate.

2. The negative pressure evaporation plating liquid cooler according to claim 1, characterized in that: A mist shield is also provided in the shell, and the mist shield is vertically arranged and blocks the air outlet side.

3. The negative pressure evaporation plating liquid cooler according to claim 1, characterized in that: The shell is also provided with a pressure regulating tube, which is arranged close to the top end of the shell and is used to regulate the pressure inside the shell.

4. The negative pressure evaporation plating liquid cooler according to claim 1, characterized in that: A drain pipe is arranged at the bottom of the shell.

5. The negative pressure evaporation plating liquid cooler according to claim 4, characterized in that: An overflow pipe is also provided on the shell, the top end of the overflow pipe is located below the air inlet pipe, and the bottom end of the overflow pipe is connected to the drain pipe.

6. The negative pressure evaporation plating liquid cooler according to any one of claims 1 to 5, characterized in that: A refrigerator is arranged at the bottom of the shell.

7. The negative pressure evaporation plating liquid cooler according to claim 1, characterized in that: The inlet of the spray pipe is connected to the outlet of the pump through a pipeline, and the inlet of the pump is connected to the liquid outlet of the plating tank.

8. The negative pressure evaporation plating liquid cooler according to claim 1, characterized in that: The shell is made of UPVC material.

9. The negative pressure evaporation plating liquid cooler according to claim 7, characterized in that: The pipe and the housing of the pump are made of UPVC or PVDF material.

10. The negative pressure evaporation plating liquid cooler according to claim 1, characterized in that: The volume of the shell is set according to the volume of the plating tank.