Acid mist removing device and electrolytic metal washing tank

Abstract

According to the acid mist removing device and the electrolytic metal washing tank, a tank side air draft channel I is arranged on the side face of a pickling tank, a tank side air draft channel II is arranged on the side face of a scalding tank, and an air draft opening corresponding to the tank side air draft channel I is located at an opening of the pickling tank; an air suction opening corresponding to the tank side air suction channel II is positioned at an opening of the scalding tank, so that the tank side air suction channel I is used for absorbing acid mist volatilized from the pickling tank, the tank side air suction channel II is used for absorbing water vapor volatilized from the scalding tank, and then the water vapor is intensively collected into the acid mist absorption header pipe and then is discharged after being absorbed by the acid mist absorption tower; therefore, orderly collection and treatment of acid mist and steam in the electrolysis plant are realized, acid mist corrosion of on-site steel members, equipment and facilities can be avoided, favorable conditions are provided for safe and reliable operation of the equipment and facilities, long-period stable operation of a nickel electrolysis production system can be ensured, the on-site operation environment of the nickel electrolysis plant is improved, and the production cost is reduced. And a safe, healthy and comfortable action environment is provided for workers.

Description

Technical Field

[0001] The utility model belongs to the field of tool boxes, and in particular relates to an acid mist removal device and an electrolytic metal washing tank. Background Art

[0002] The non-ferrous metal electrolysis production industry will involve pickling and scalding of cathodes (stainless steel cathodes, titanium cathodes, and starter cathodes). The nickel electrolysis industry generally uses concentrated hydrochloric acid (hydrochloric acid concentration of about 30%) to treat nickel starter sheets. The main purpose is to clean the dirt on the surface of the nickel starter sheet and slightly corrode the surface of the starter sheet to ensure that there will be no stratification when nickel ions are precipitated on the surface of the starter sheet. Titanium seed plates need to be treated by heating and soaking in about 400g / L of concentrated sulfuric acid. The main purpose is also to use hot concentrated sulfuric acid to corrode the surface of the titanium plate, but the degree of corrosion has very strict requirements. If the degree of corrosion is not enough, the nickel skin produced will fall off in advance and fall into the electrolytic cell; if the degree of corrosion exceeds the requirements, the nickel skin produced will be difficult to peel off, increasing the labor intensity of the job. The cathode needs to be rinsed with clean water or hot water (about 90°C) before going down the tank to avoid the acid attached during the acid treatment process from being brought into the electrolytic cell.

[0003] The above pickling tanks and scalding tanks will emit hydrochloric acid mist or steam during use. The mist and steam will not only deteriorate the working environment on site, but also corrode the equipment and facilities in the factory. In winter, the steam will form fog, which will become an obstacle to the crane operator's vision. Utility Model Content

[0004] The technical problem to be solved by the utility model is that, in view of the defect in the prior art that the pickling tank and the scalding tank will emit hydrochloric acid mist or evaporated water vapor during use, which will affect the surrounding environment, equipment and personnel, the utility model solves the problem of how to provide an acid mist removal device and an acid mist removal electrolytic metal washing tank.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A device for removing acid mist comprises a trough side exhaust channel, wherein a side exhaust port is arranged on the upper side of the trough side exhaust channel, the trough side exhaust channel comprises one or more trough side exhaust channels, and the lower part of the trough side exhaust channel is sequentially connected to an acid mist absorption tower and a fan through a pipeline.

[0007] A further technical solution is that the slot side exhaust passage has a structure that is wider at the top and narrower at the bottom.

[0008] A further technical solution is that the fan is connected to the exhaust duct of the waste gas through a pipeline.

[0009] An electrolytic metal washing tank comprises an acid mist removal device as described above and a pickling tank and a scalding tank arranged in parallel, wherein a tank side exhaust channel 1 is arranged on the side of the pickling tank, and a tank side exhaust channel 2 is arranged on the side of the scalding tank, and the side exhaust port corresponding to the tank side exhaust channel 1 is located at the opening of the pickling tank, and the side exhaust port corresponding to the tank side exhaust channel 2 is located at the opening of the scalding tank, the tank side exhaust channel is connected to an acid mist absorption branch pipe 1 at the lower part, and the tank side exhaust channel 2 is connected to an acid mist absorption branch pipe 2 at the lower part, the acid mist absorption branch pipe 1 and the acid mist absorption branch pipe 2 are both connected to an acid mist absorption main pipe, and the acid mist absorption main pipe is connected to an acid mist absorption tower.

[0010] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0011] By arranging a side exhaust port on the upper side of the trough side exhaust channel, the trough side exhaust channel includes one or more, and the lower part of the trough side exhaust channel is connected to the acid mist absorption tower, the fan and the exhaust gas external exhaust duct in sequence through pipelines. When in use, the trough side exhaust channel can be arranged on one side of the washing trough, and the side exhaust port faces the open part of the washing trough. In this way, after starting the fan, the hydrochloric acid mist evaporated from the washing trough or the water vapor evaporated can be sucked in from the side exhaust port, and then the acid mist is absorbed by the acid mist absorption tower and discharged from the exhaust gas external exhaust duct.

[0012] A tank side exhaust channel 1 is provided on the side of the pickling tank, a tank side exhaust channel 2 is provided on the side of the scalding tank, and the side exhaust port corresponding to the tank side exhaust channel 1 is located at the opening of the pickling tank, and the side exhaust port corresponding to the tank side exhaust channel 2 is located at the opening of the scalding tank, the tank side exhaust channel is connected to the acid mist absorption branch pipe 1 at the lower part, the tank side exhaust channel 2 is connected to the acid mist absorption branch pipe 2 at the lower part, the acid mist absorption branch pipe 1 and the acid mist absorption branch pipe 2 are both connected to the acid mist absorption main pipe, and the acid mist absorption main pipe is connected to the acid mist absorption tower, so that the tank side exhaust channel 1 is used to absorb acid The acid mist volatilized in the washing tank, the second exhaust channel on the tank side is used to absorb the water vapor volatilized in the scalding washing tank, and then collected in the acid mist absorption main pipe, and then discharged after being absorbed by the acid mist absorption tower, thereby realizing the orderly collection and treatment of acid mist and vapor in the electrolysis plant, avoiding acid mist corrosion of on-site steel components, equipment and facilities, providing favorable conditions for the safe and reliable operation of equipment and facilities, ensuring the long-term stable operation of the nickel electrolysis production system, improving the on-site working environment of the nickel electrolysis plant, and providing employees with a safe, healthy and comfortable working environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A schematic structural diagram of an electrolytic metal washing tank for removing acid mist.

[0014] Figure 2 This is a view of the exhaust channel A on the slot side. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0016] like Figure 1 and Figure 2 An acid mist removal device includes a tank side exhaust channel, a side exhaust port 1 is arranged on the upper side of the tank side exhaust channel, the tank side exhaust channel includes one or more, and the lower part of the tank side exhaust channel is connected to an acid mist absorption tower 5, a fan 6 and an exhaust gas external exhaust duct 7 in sequence through pipelines.

[0017] When in use, the trough side exhaust channel can be set on one side of the washing trough, with the side exhaust port 1 facing the open part of the washing trough. In this way, after starting the fan 6, the hydrochloric acid mist volatilized from the washing trough or the water vapor evaporated can be sucked in from the side exhaust port 1, and then the acid mist is absorbed by the acid mist absorption tower 5 and discharged from the exhaust duct 7.

[0018] The orderly collection and treatment of acid mist and steam in the electrolysis plant can avoid acid mist corrosion of on-site steel components, equipment and facilities, provide favorable conditions for the safe and reliable operation of equipment and facilities, ensure the long-term stable operation of the nickel electrolysis production system, improve the on-site working environment of the nickel electrolysis plant, and provide employees with a safe, healthy and comfortable working environment.

[0019] The trough side exhaust passage is a structure that is wide at the top and narrow at the bottom, which is also equivalent to a flat funnel-shaped structure. The fan 6 is connected to the exhaust gas external exhaust duct 7 through a pipeline, and the exhaust gas external exhaust duct 7 is used for external exhaust.

[0020] An electrolytic metal washing tank comprises an acid mist removal device as described above and a pickling tank 10 and a scalding tank 11 arranged in parallel, wherein a tank side exhaust channel 8 is arranged on the side of the pickling tank 10, a tank side exhaust channel 2 9 is arranged on the side of the scalding tank 11, and a side exhaust port 1 is located at the opening of the washing tank, the lower part of the tank side exhaust channel 8 is connected to an acid mist absorption branch pipe 2, the lower part of the tank side exhaust channel 2 9 is connected to an acid mist absorption branch pipe 2 3, the acid mist absorption branch pipe 1 2 and the acid mist absorption branch pipe 2 3 are both connected to an acid mist absorption main pipe 4, and the acid mist absorption main pipe 4 is connected to an acid mist absorption tower 5.

[0021] When in use, the side exhaust port 1 corresponding to the tank side exhaust channel 1 8 and the tank side exhaust channel 2 9 is located on the long side of the pickling tank 10 and the scalding tank 11. The negative pressure generated by the fan 6 is controlled according to the amount of volatilized acid mist and the amount of evaporated water vapor to ensure that the volatilized hydrochloric acid mist and the evaporated water vapor are all collected and discharged after being treated by the acid mist absorption device to meet the standards. Under normal circumstances, the pickling tank 10 and the scalding tank 11 need to be covered with a tank cover during storage to seal and store. When the pickling tank 10 and the scalding tank 11 are in operation, the fan 6 is turned on in advance, and the side exhaust port 1 on the tank side exhaust channel 1 8 and the tank side exhaust channel 2 9 starts to be sucked. The acid mist and water vapor on the tank surface enter the acid mist absorption tower 5 along the side exhaust port 1, the tank side exhaust channel 1 8 and the tank side exhaust channel 2 9, the acid mist absorption branch pipe 1 2, the acid mist absorption branch pipe 2 3, and the acid mist absorption main pipe 4. After being treated by spraying and washing with new water in the tower and meeting the standards, they are discharged.

[0022] The above are only preferred embodiments of the present invention.

Claims

1. An acid mist removal device, characterized in that: The invention comprises a trough side exhaust channel, wherein a side exhaust port (1) is arranged on the upper side of the trough side exhaust channel, the trough side exhaust channel comprises one or more trough side exhaust channels, and the lower part of the trough side exhaust channel is connected in sequence to an acid mist absorption tower (5) and a fan (6) through a pipeline.

2. The acid mist removal device according to claim 1, characterized in that: The fan (6) is connected to the exhaust gas external smoke duct (7) through a pipeline.

3. The acid mist removal device according to claim 1, characterized in that: The slot side exhaust passage has a structure that is wide at the top and narrow at the bottom.

4. An electrolytic metal washing tank, characterized in that: The invention comprises an acid mist removal device as claimed in any one of claims 1 to 3, and a pickling tank (10) and a scalding tank (11) arranged in parallel, wherein a tank side exhaust channel 1 (8) is arranged on the side of the pickling tank (10), and a tank side exhaust channel 2 (9) is arranged on the side of the scalding tank (11), the lower part of the tank side exhaust channel 1 (8) is connected to an acid mist absorption branch pipe 1 (2), the lower part of the tank side exhaust channel 2 (9) is connected to an acid mist absorption branch pipe 2 (3), the acid mist absorption branch pipe 1 (2) and the acid mist absorption branch pipe 2 (3) are both connected to an acid mist absorption main pipe (4), and the acid mist absorption main pipe (4) is connected to an acid mist absorption tower (5).

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