Chromium plating acid mist emission reduction device

Abstract

The utility model relates to a chromeplate acid mist emission reduction device which comprises a chromium mist inhibitor adding assembly (2) and an air draft assembly (3) which are arranged on a chromeplate tank (1), the chromium fog inhibitor adding assembly (2) comprises a liquid storage tank (21), a conveying pipe (22), a switch valve (23) and an ampere-hour meter (24), the liquid storage tank (21) is communicated with the chromium plating tank (1) through the conveying pipe (22), and the switch valve (23) is arranged on the conveying pipe (22) and connected with the ampere-hour meter (24); and the air draft assembly (3) comprises a fan for extracting chromeplate acid mist in the chromeplate tank (1). Compared with the prior art, waste caused by volatilization of chromium fog can be reduced, so that the effects of environmental protection, energy conservation and emission reduction are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of electroplating waste gas treatment, in particular to a chromium plating acid mist emission reduction device. Background Art

[0002] During the gravure printing roller manufacturing process, the roller must be chromium-plated. Chromic anhydride, a key chromium compound, is a purple-red needle-shaped or flake-shaped crystal. It is a primary raw material in the electroplating industry and the primary raw material for chromium electroplating. However, chromic anhydride is toxic and can be harmful to the health of operators. Existing chromium plating processes have low current efficiency, and poorly sealed plating tanks allow chromium mist to evaporate, resulting in high levels of chromium mist in workshop equipment, floors, and the environment, leading to poor overall quality of the workshop equipment and environment. Utility Model Content

[0003] The purpose of the utility model is to provide a chromium plating acid mist emission reduction device to improve the workshop environment.

[0004] The purpose of the utility model can be achieved by the following technical solutions: a chromium plating acid mist emission reduction device, comprising a chromium mist inhibitor adding component and an exhaust component arranged on a chromium plating tank;

[0005] The chromium mist inhibitor adding assembly includes a liquid storage tank, a delivery pipe, a switch valve and an ampere-hour meter. The liquid storage tank is connected to the chrome plating tank through the delivery pipe. The switch valve is arranged on the delivery pipe and is connected to the ampere-hour meter.

[0006] The exhaust assembly includes a fan for extracting chromic acid mist from the chromium plating tank.

[0007] Preferably, a mixture of chromium mist inhibitor and water is stored in the liquid storage tank.

[0008] Further preferably, the mass ratio of the chromium mist inhibitor to water is 1:(0.8~1.2).

[0009] More preferably, the chromium mist inhibitor contains a wetting agent and a surfactant.

[0010] More preferably, the chromium mist inhibitor is Pulse 599NS.

[0011] Preferably, the switch valve is a solenoid valve.

[0012] Preferably, the exhaust assembly further includes an air duct connected to the chrome plating tank.

[0013] Further preferably, the blower is connected to an acid mist recovery pipeline through an air duct, and the acid mist recovery pipeline is connected to an acid mist treatment component.

[0014] More preferably, the acid mist treatment component includes an acid mist recovery tower.

[0015] Preferably, the acid mist recovery tower is arranged outside the electroplating workshop.

[0016] Preferably, the acid mist recovery tower includes a tower body and a titanium mesh arranged in the tower body.

[0017] Further preferably, the titanium mesh is detachably installed in the tower body through a pull-out structure.

[0018] Preferably, the chrome plating tank is connected to a chrome plating liquid circulation component.

[0019] Further preferably, the chromium plating solution circulation component includes a circulation tank connected to the chromium plating tank.

[0020] More preferably, the chrome plating solution circulation assembly further includes a circulation pump provided on the circulation pipeline between the chrome plating tank and the circulation tank.

[0021] More preferably, a filter is provided between the chrome plating tank and the circulation tank.

[0022] Preferably, the delivery pipe is further provided with a feeding pump.

[0023] Preferably, the chromium mist inhibitor adding component, the exhaust component and the chromium plating liquid circulation component are all connected to a controller.

[0024] Further preferably, the controller includes a PLC controller.

[0025] Preferably, a slot cover is detachably mounted on the chrome plating slot.

[0026] A method for reducing chromium plating acid mist emissions is carried out using the above-mentioned chromium plating acid mist emission reduction device.

[0027] Preferably, during the chromium plating process, an ampere-hour meter is used to control the chromium mist inhibitor adding component to automatically add a mixture of chromium mist inhibitor and water to the chromium plating tank, with the added amount being 18-22 mL / 1KAh.

[0028] Preferably, during the chrome plating process, the wind speed of the fan is 0.2-0.5 m / s.

[0029] The chrome plating process requires powerful ventilation and exhaust devices as well as chrome mist treatment devices, which results in high chromium anhydride consumption and high waste gas treatment costs. The utility model greatly reduces the waste caused by the volatilization of chrome mist by improving the ventilation volume, thereby achieving the effects of environmental protection, energy saving and emission reduction.

[0030] Preferably, a chromium mist inhibitor is added into the chromium plating tank before chromium plating, and the volume ratio of the chromium mist inhibitor to the electroplating solution in the chromium plating tank is 1.5-2 mL:1 L.

[0031] Preferably, during the chromium plating process, the electroplating current density is 55-60 A / dm².

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] 1. This utility model automatically adds chromium mist inhibitors through ampere-hour accumulation control, effectively suppressing chromium mist during electroplating processing, and removes chromium plating acid mist from the chromium plating tank through the exhaust component, which can improve the workshop environment.

[0034] 2. The utility model can process and recycle chromium plating acid mist through the coordinated arrangement of the exhaust component and the acid mist treatment component.

[0035] 3. The utility model is simple to operate and can be used synchronously in daily processing, which is achieved through the automatic timing of the chrome mist inhibitor addition component.

[0036] 4. The utility model can improve the environment, improve the working environment of the workshop, and reduce the volatilization of gases harmful to the human body.

[0037] 5. The utility model can greatly reduce the waste caused by the volatilization of chromium mist by improving the air volume of the exhaust, thereby achieving the effect of environmental protection, energy saving and emission reduction.

[0038] 6. The utility model can save costs by reducing the air volume and the effect of the inhibitor, reducing the loss caused by the volatilization of chromium mist, thereby saving the cost of waste gas and waste liquid treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a schematic diagram of the structure of the chromium plating acid mist reduction device of the utility model. Figure 1 ;

[0040] Figure 2 This is a schematic diagram of the structure of the chromium plating acid mist reduction device of the utility model. Figure 2 ;

[0041] Figure 3 This is a side view of the acid mist recovery tower of the utility model;

[0042] Figure 4 This is a front view of the acid mist recovery tower of the utility model;

[0043] In the figure: 1-chrome plating tank, 2-chrome mist inhibitor addition component, 21-liquid storage tank, 22-delivery pipe, 23-switch valve, 24-ampere-hour meter, 3-exhaust component, 4-chrome plating liquid circulation component, 41-circulation tank, 42-circulation pump, 5-filter, 5-acid mist recovery tower, 51-tower body, 52-drawer, 53-support frame, 54-first interface, 55-second interface, 56-pipeline, 57-liquid storage tank, 58-titanium pump, 59-observation window. DETAILED DESCRIPTION

[0044] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0045] Example 1

[0046] A chromium plating acid mist reduction device, such as Figures 1 and 2 As shown, the chromium mist suppressant addition assembly 2 and the exhaust assembly 3 are included. The chromium mist suppressant addition assembly 2 includes a liquid reservoir 21 disposed above the chromium plating tank 1. The liquid reservoir 21 is connected to the chromium plating tank 1 via a delivery pipe 22, which is used to add chromium mist suppressant to the chromium plating tank 1. An on-off valve 23 is disposed on the delivery pipe 22 and is connected to an ampere-hour meter 24, which automatically controls the addition of chromium mist suppressant by ampere-hour accumulation. The exhaust assembly 3 includes a fan that extracts the chromium plating acid mist from the chromium plating tank 1 and delivers it to the acid mist treatment assembly through a pipeline.

[0047] Example 2

[0048] A chromium plating acid mist emission reduction device comprises a liquid reservoir 21 containing a mixture of a chromium mist suppressant and water. In this embodiment, the suppressant is Pulse 599NS, with a mass ratio of 1:1. During the chromium plating process, the suppressant is automatically replenished using ampere-hour accumulation control at a rate of 20 mL / 1 KAh. Simultaneously, a fan is used to extract the chromium plating acid mist at a speed of 0.2-0.5 m / s. The remaining steps are the same as in Example 1.

[0049] Example 3

[0050] A chromium plating acid mist emission reduction device comprises a chromium plating tank 1 connected to a chromium plating solution circulation assembly 4. The chromium plating solution circulation assembly 4 comprises a circulation tank 41 and a circulation pump 42. The circulation tank 41 is connected to the chromium plating tank 1 via a circulation pipeline, and the circulation pump 42 is disposed on the circulation pipeline. Furthermore, in this embodiment, a filter 5 is disposed between the chromium plating tank 1 and the circulation tank 41. The remaining components are the same as those in Example 2.

[0051] A method for reducing chromium plating acid mist emissions, comprising the following steps:

[0052] (1) Add chromium mist inhibitor to the chromium plating tank so that the volume ratio of chromium mist inhibitor to the plating solution in the chromium plating tank is 1.7 mL:1 L. Add a mixture of chromium mist inhibitor and water to the liquid storage tank so that the mass ratio of chromium mist inhibitor to water is 1:1.

[0053] (2) Turn on the circulation pump to allow the plating solution to circulate between the chrome plating tank and the circulation tank for 10 to 15 minutes.

[0054] (3) Place the plate roller in the chrome plating tank and cover it with the tank cover;

[0055] (4) The plate is plated in a chrome plating tank with an electroplating current density of 57A / dm². The chrome mist inhibitor adding component automatically adds a mixture of chrome mist inhibitor and water into the electroplating tank through ampere-hour accumulation control. The added amount is 20mL / 1KAh. At the same time, the air is exhausted through the exhaust component at a wind speed of 0.3m / s.

[0056] During the plating process in step (4), observe the foam situation near the anode of the electroplating tank and the foam situation in the circulation tank. If there is too much foam, increase the amount of foam added appropriately and reduce the wind speed.

[0057] Example 4

[0058] In this embodiment, the acid mist treatment assembly includes an acid mist recovery tower 5, specifically, as Figures 3 and 4 As shown, the acid mist recovery tower 5 includes a tower body 51 and a titanium mesh removably mounted within the tower body 51 via a drawer 52. The tower body 51 is mounted on a support frame 53. A first port 54 for communication with the exhaust assembly 3 is provided at the lower portion of the tower body 51, a second port 55 for communication with the outdoor fan is provided at the upper portion, and the titanium mesh is installed in the middle portion. The tower body 51 is connected to a liquid storage tank 57 via a pipe 56 equipped with a ball valve. The liquid storage tank 57 is connected to a titanium pump 58 capable of transporting the recovered chromic acid solution. Furthermore, in this embodiment, an observation hole 59 is also provided on the tower body 51.

[0059] In this embodiment, the chromic acid mist extracted from the chromium plating tank 1 by the exhaust assembly 3 enters the tower body 51 through the first interface 54 and flows out through the second interface 55. During this process, the chromic acid mist is intercepted by the titanium mesh, causing it to condense into larger droplets and enter the liquid storage tank 57 through the pipe 56. The rest is the same as in Example 3.

[0060] The above description of the embodiments is intended to facilitate understanding and use of the utility model by those skilled in the art. Those skilled in the art will readily be able to make various modifications to these embodiments and apply the general principles described herein to other embodiments without requiring inventive effort. Therefore, the utility model is not limited to the above-described embodiments. Improvements and modifications made by those skilled in the art based on the disclosure of this utility model without departing from the scope of this utility model should be within the scope of protection of this utility model.

Claims

1. A chromium plating acid mist emission reduction device, characterized in that: It comprises a chrome mist inhibitor adding component (2) and an exhaust component (3) arranged on a chrome plating tank (1); The chromium mist inhibitor adding assembly (2) comprises a liquid storage tank (21), a delivery pipe (22), a switch valve (23) and an ampere-hour meter (24); the liquid storage tank (21) is connected to the chrome plating tank (1) through the delivery pipe (22); the switch valve (23) is arranged on the delivery pipe (22) and is connected to the ampere-hour meter (24); The exhaust assembly (3) comprises a fan for extracting chromium plating acid mist from the chromium plating tank (1).

2. The chromium plating acid mist emission reduction device according to claim 1, characterized in that: The liquid storage tank (21) stores a mixture of chromium mist inhibitor and water.

3. The chromium plating acid mist emission reduction device according to claim 1, characterized in that: The fan is connected to the acid mist recovery pipeline, and the acid mist recovery pipeline is connected to the acid mist treatment component.

4. The chromium plating acid mist emission reduction device according to claim 3, characterized in that: The exhaust assembly (3) further comprises an air duct connected to the chrome plating tank, and the fan is connected to the acid mist recovery pipeline via the air duct.

5. The chromium plating acid mist emission reduction device according to claim 3, characterized in that: The acid mist treatment component includes an acid mist recovery tower arranged outside the electroplating workshop.

6. The chromium plating acid mist emission reduction device according to claim 5, characterized in that: The acid mist recovery tower comprises a tower body (51) and a titanium mesh arranged in the tower body (51).

7. The chromium plating acid mist emission reduction device according to claim 6, characterized in that: The titanium mesh is detachably installed in the tower body (51) through a pulling structure.

8. The chromium plating acid mist emission reduction device according to claim 1, characterized in that: The chrome plating tank (1) is connected to a chrome plating liquid circulation component (4); The chromium plating liquid circulation component (4) comprises a circulation tank (41) connected to the chromium plating tank (1).

9. The chromium plating acid mist emission reduction device according to claim 1, characterized in that: The wind speed of the fan is 0.2~0.5m / s.

10. The chromium plating acid mist emission reduction device according to claim 1, characterized in that: The switch valve (23) is a solenoid valve.

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