Acid mist absorption system on electrolytic bath and electrolytic bath system

Abstract

The invention relates to the technical field of nickel electrolysis, in particular to an acid mist absorption system on an electrolytic bath and an electrolytic bath system. The acid mist absorption system is internally provided with the supports, the flexible acid mist cover, the track, the exhaust pipe, the induced draft fan, the follow-up reverse spraying pipe and the absorption tower, the multiple supports are fixedly connected with the flexible acid mist cover and can flexibly move on the track surrounding the electrolytic tank, and the exhaust pipe is arranged on the inner side of the track and provided with a plurality of small holes. During electrolysis or electrodeposition work, the support can be pulled open to cover the electrolytic tank below the flexible acid mist cover to form a closed space, the air suction pipe changes the interior of the space into micro negative pressure under the action of the fan, and generated acid mist enters a reverse spraying pipe for acid mist treatment and an absorption tower along with the air suction pipe. The device is simple in structure, flexible to move, convenient to open and close, low in cost, convenient to operate, good in sealing performance and adaptability and capable of being matched with various electrolytic cells, and the flexible acid mist cover is connected and supported by a plurality of supports so that the flexible acid mist cover cannot fall in the opening and closing process.

Description

Technical Field

[0001] The invention relates to the technical field of nickel electrolysis, and in particular to an acid mist absorption system on an electrolytic cell and an electrolytic cell system. Background Art

[0002] During the hydrometallurgical production process, oxygen and other gases are precipitated at the anode. The gases released from the anode overflow from the solution near the anode. Under the action of surface tension, the bubbles will bring a small amount of acid into the air, forming acid mist, resulting in poor working conditions for workers on the job. The generation of acid mist will also corrode equipment and facilities in the factory.

[0003] Therefore, the industry usually uses suction equipment to suck away the acid mist generated by the anode and absorb it. For example, Chinese patent CN201482410U discloses a copper electrodeposition acid mist absorption device, which is a hard plastic or fiberglass frame closed on all four sides, and an acid-resistant cloth is covered on the opening above the frame to form a closed space above the electrolytic cell, which will not cause leakage of acid mist. When the electrode plate needs to be removed, the acid-resistant cloth on the top needs to be manually removed. During this process and during the operation of the electrolytic cell, the acid-resistant cloth may fall off, and it is labor-intensive to remove the acid-resistant cloth, which usually requires at least two people. Therefore, Chinese patent CN203923395U discloses an environmentally friendly and energy-saving diaphragm electrolysis device, wherein the electrolysis device is equipped with an acid mist capture device, which includes an acid mist absorption tower, a water pump, an exhaust fan and a diaphragm frame group with a built-in acid mist capture channel. The acid mist is captured by the acid mist capture channel and drawn into the acid mist absorption tower for absorption treatment. The device does not affect the removal of the electrode plate when used, but has poor sealing performance, which will cause the overflow of the acid mist, and a large number of diaphragm frame groups need to be used according to the number of electrode plates. It is not suitable for electrolytic cells that do not require diaphragm plates, has high costs, and has a complex structure. Summary of the invention

[0004] In order to solve the problems existing in the prior art, the present invention develops an acid mist absorption system and electrolytic cell applicable to different electrolytic cells, which has good sealing performance, is easy to operate and open and close, and has low cost. The specific scheme is as follows:

[0005] An acid mist absorption system on an electrolytic cell comprises: a bracket, a flexible acid mist cover, a track, an exhaust pipe and an induced draft fan: there are two tracks in total, the two tracks are arranged in parallel, and limiting devices are arranged at opposite ends of the two tracks. A groove is provided above each track, and a plurality of the brackets are movably placed in the grooves of the tracks. All the brackets are fixedly connected to the flexible acid mist cover. The length of the drooping part of the flexible acid mist cover in four directions is greater than the height of the bracket. An exhaust pipe is also arranged on the inner side of the track, and the exhaust pipe comprises a rectangular annular tube and an induced draft tube, the rectangular annular tube and the induced draft tube are vertically connected, the induced draft tube is connected to the induced draft fan, and a plurality of air holes are provided on the rectangular annular tube.

[0006] Further, the limit device includes a limiter, a pin and a cotter pin, the limiter is fixed to the end of the track and is higher than the groove, a first through hole is provided on the side of the track close to the limiter, the first through hole passes through the groove of the track, the pin passes through the first through hole, the pin is composed of a limit block and a pin rod fixedly connected, the size of the limit block is larger than the size of the first through hole, a second through hole is provided at the end of the pin rod away from the limit block and protruding out of the through hole, the cotter pin passes through the second through hole, and there is at least one bracket between the limiter and the pin.

[0007] Furthermore, the flexible acid mist cover is made of PVC acid-resistant cloth.

[0008] Furthermore, the air holes are opened on the inner side or the upper side of the rectangular annular tube.

[0009] Furthermore, it also includes a reverse spray pump, a reverse nozzle, a reverse spray pipe, a circulation pump and an absorption tower, the induced draft fan is connected to the top of the reverse spray pipe, the reverse nozzle is located in the middle of the reverse spray pipe, the bottom of the reverse spray pipe is connected to the absorption tower, and the absorption tower is provided with a foam capture screen, an atomizing nozzle and a filler from top to bottom, the filler is located above the connection between the reverse spray pipe and the absorption tower, the bottom of the absorption tower stores circulating liquid, the bottom of the absorption tower is connected to the atomizing nozzle via the circulation pump, and the bottom of the absorption tower is connected to the reverse nozzle via the reverse spray pump.

[0010] An electrolytic cell system equipped with the above-mentioned acid mist absorption system is also proposed, comprising an electrolytic cell and the acid mist absorption system, wherein pads are provided on both side walls of the electrolytic cell, a cathode or an anode is fixed on the pads, two tracks in the acid mist absorption system are respectively fixed on the outside of the pads, and the rectangular ring tube in the exhaust pipe is fixed on the pads and located on the inside of the cathode or the anode.

[0011] Furthermore, the electrolytic cell system also includes a feed pipe, which is provided with a feed port. The feed pipe is fixed on a pad and located on the inner side of the cathode or anode. The rectangular annular tube in the exhaust pipe is fixed on the inner side of the feed pipe and on the pad. The feed port of the feed pipe and the air holes of the rectangular annular tube are staggered.

[0012] Furthermore, the electrolytic cell system is composed of at least two electrolytic cell bodies connected in series, the two tracks in the acid mist absorption system are respectively fixed to the outside of the pads of the two outermost side walls, the rectangular annular tube in the exhaust pipe is fixed on the pads of the two outermost side walls and is located on the inner side of the cathode or the anode, and a plurality of exhaust branch pipes fixed on the inner wall pads are arranged in the rectangular annular tube, and a plurality of air holes are also opened on the exhaust branch pipes.

[0013] The beneficial effects of the present invention are:

[0014] (1) The present invention provides an acid mist absorption system on an electrolytic cell. Tracks are installed on both sides of the electrolytic cell so that a flexible acid mist cover installed with a bracket can be opened and closed along the track. At the same time, the acid mist cover is larger than the range limited by the bracket and will hang down to the surrounding areas. When in use, the electrolytic cell is sealed. At the same time, a negative pressure is formed in the sealed space above the electrolytic cell by exhausting air. The two aspects work together to prevent the overflow of acid mist. In addition, the exhaust pipe is also an integral structure, and there is no need to match multiple ones according to the number of electrode plates. The exhaust pipe is evenly distributed with small holes, so that acid mist can be extracted from multiple positions of the electrolytic cell at the same time. The acid mist absorption system has a simple structure, flexible movement, convenient opening and closing, low cost, and convenient operation. At the same time, the sealing and adaptability are good, and it can be adapted to a variety of electrolytic cells.

[0015] (2) The acid mist absorption system of the present invention is provided with a plurality of movable brackets, so that the supporting points of the flexible acid mist cover are densely packed, thereby ensuring that when the flexible acid mist cover is folded up after leaving the tank, the flexible acid mist cover does not fall down, and thus does not contact with the electrolytic cell parts, electrolyte, electrode plates, etc.;

[0016] (3) In addition, the induced draft fan directly draws the acid mist generated on the electrolytic cell during the electrolysis process to the acid mist absorption tower, and performs two-step absorption, first performing a countercurrent absorption at the reverse nozzle, and then performing a secondary countercurrent absorption at the absorption tower, which has a better absorption effect. At the same time, a foaming wire mesh is arranged above the absorption tower to further remove the entrained water in the acid mist, thereby improving the acid mist absorption effect;

[0017] In summary, the acid mist absorption system has a simple structure, is easy to open and close, can be operated by one person, and can be adapted to a variety of electrolytic cells. The acid mist is not prone to leakage and has a high absorption efficiency, which can greatly improve the working environment of employees on the electrolytic cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The embodiments of the present invention are further described below with reference to the accompanying drawings, in which:

[0019] Figure 1 shows a front view of an electrolytic cell equipped with an acid mist absorption system;

[0020] Figure 2 A top view of an electrolytic cell with an acid mist absorption system installed is shown;

[0021] Figure 3 Shows Figure 2 The encircled part Ⅰ is an enlarged view of the structure of the track limit device;

[0022] Figure 4 Shows Figure 2 Side view from AA perspective;

[0023] Figure 5 Shows Figure 4 The enlarged view of the structure of the circled part Ⅱ;

[0024] Figure 6 A schematic diagram of the exhaust pipe structure is shown;

[0025] Figure 7 A schematic diagram showing the structure of the acid mist absorption system independent of the electrolytic cell part is shown.

[0026] Among them, 1-electrolytic cell, 2-bracket, 3-flexible acid mist hood, 4-track, 5-cathode, 6-feed pipe, 7-exhaust pipe, 8-anode, 9-cathode plate, 10-anode plate, 11-electrolyte, 12-pad, 13-copper rod, 14-cathode plate, 15-induced draft fan, 16-reverse spray pump, 17-reverse nozzle, 18-reverse spray pipe, 19-foam capture screen, 20-atomizing nozzle, 21-filler, 22-circulating pump, 23-limiter, 24-pin shaft, 25-open pin, 26 insulating block. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through specific embodiments in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0028] like Figure 1-6As shown, an acid mist absorption system is installed on an electrolytic double tank, and pads 12 are provided on both side walls of the electrolytic tank 1, and a cathode 5 or an anode 8 is fixed on the pads 12. An insulating block 26 is also fixed on the cathode of the outermost wall, and an insulating block is also placed on the right half of the anode on the middle wall of the double tank. The electrolytic tank is filled with electrolyte 11, and anode plates 10 and cathode plates 9 are staggered and placed in the tank and partially immersed in the electrolyte. The cathode plate 14 is placed in another tank, and a copper rod 13 is fixed on the top of the cathode plate 9 or the cathode plate 14. The cathode plate is placed on the insulating block and the cathode via the copper rod 13. The electrolytic tank 1 also contains a feed pipe 6, and a feed port is opened on the feed pipe 6. The feed pipe 6 is fixed on the pads 12 of all side walls and is located on the inner side of the cathode 5 or the anode 8. The two tracks 4 in the acid mist absorption system are respectively fixed to the outer sides of the pads 12 of the two outermost side walls. The two tracks 4 are arranged in parallel. A groove is provided on the top of each track 4. A limiting device is provided on the left side (opposite end) of the two tracks 4. The limiting device includes a limiter 23, a pin 24 and a cotter pin 25. The limiter 23 is fixed to the end of the track 4 and is higher than the groove. A first through hole is provided on the side of the track 4 close to the limiter 23. The first through hole passes through the groove of the track 4. The pin 24 passes through the first through hole. The size of the pin 24 is composed of a limit block and a pin rod fixedly connected. The size of the limit block is larger than the size of the first through hole. The pin rod passes through the first through hole. The limit block is fixed outside the first through hole. A second through hole is provided at the end of the pin rod away from the limit block and protruding out of the through hole. The cotter pin 25 passes through the first through hole. Two through holes, a bracket 2 is limited between the stopper 23 and the pin 24, and the remaining multiple brackets 2 are movably placed in the groove of the track 4. All brackets 2 are fixedly connected to the flexible acid mist cover 3. The lengths of the drooping parts of the flexible acid mist cover 3 in four directions are all greater than the height of the bracket 2. An exhaust pipe 7 is also arranged on the inner side of the track 4. The exhaust pipe 7 includes a rectangular annular tube and an induced draft pipe. The rectangular annular tube and the induced draft pipe are vertically connected. The induced draft pipe is connected to the induced draft fan 15. A plurality of air holes are opened above the rectangular annular tube. The rectangular annular tube in the exhaust pipe 7 is fixed on the pads 12 of the two outermost side walls and is located on the inner side of the cathode 5 or the anode 8. Two exhaust branch pipes are also arranged on the pad 12 of the middle wall. The two exhaust branch pipes are connected to the rectangular annular tube, and the feed port of the feed pipe 6 and the air holes of the rectangular annular tube and the exhaust branch pipe are staggered.

[0029] like Figure 7 As shown, the induced draft fan 15 is connected to the top of the reverse spray pipe 18, the reverse nozzle 17 is located in the middle of the reverse spray pipe 18, and the bottom of the reverse spray pipe 18 is connected to the absorption tower. From top to bottom, a foam capture screen 19, an atomizing nozzle 20 and a filler 21 are arranged in the absorption tower. The filler 21 is located above the connection between the reverse spray pipe 18 and the absorption tower. Circulating liquid is stored at the bottom of the absorption tower. The bottom of the absorption tower is connected to the atomizing nozzle 20 via a circulating pump 22, and the bottom of the absorption tower is also connected to the reverse nozzle 17 via a reverse spray pump 16.

[0030] During normal production, multiple brackets 2 are pulled apart, the flexible acid mist cover is opened, and the electrolytic cell 1 is covered to close the electrolytic cell 1. When the bracket moves to the leftmost side of the track, the limit device of the track is used to prevent the bracket from sliding to the right along the track to prevent the bracket from derailing. The bracket moves in the groove on the track. Figure 3 As shown, one end of the anode plate 10 contacts the anode 8, and the other end contacts the insulating block 26. One end of the copper rod 13 on the cathode plate 14 contacts the cathode, and the other end contacts the insulating block. The cathode plate 10 and the anode plate 14 are immersed in the electrolyte 11 to form a closed loop. The feed pipe 6 installed on the electrolytic cell 1 feeds the diaphragm bag of the cathode plate. An exhaust pipe 7 is installed next to the feed pipe 6. During the electrolysis or electrodeposition process, when acid mist is generated, the flexible acid mist cover 3 is exhausted by the induced draft fan 15 and the exhaust pipe 7 to provide a slight negative pressure, so that the acid mist in the space can be extracted, and the acid mist will not overflow in the environment. When the pole plate is out of the slot, the flexible acid mist cover 3 is opened as the 2 brackets move, and the plate is started to be taken out.

[0031] refer to Figure 7 The acid mist absorption system is further explained. The acid mist on the electrolytic cell 1 is uniformly drawn in and out by the induced draft fan 15 through the exhaust pipe 7. The acid mist first enters the reverse spray pipe 18 of the absorption tower. The reverse spray pump 16 leads the circulating liquid in the absorption tower to the reverse nozzle 17 in the reverse spray pipe 18 and sprays it upward, and the acid mist is subjected to the first dynamic wave absorption. Then the acid mist enters the absorption tower, and the circulation pump 22 sprays the circulating liquid in the tower evenly on the filler 21 through the atomizing nozzle 20. The acid mist diffuses upward and contacts with the filler for the second absorption. At the same time, a layer of foam catching screen 19 is installed above the filler 21 to further remove the entrained water in the acid mist.

[0032] Some exemplary embodiments of the present invention are described above. It can be understood that the above embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention. The features in these embodiments can be recombined in a suitable manner, and the scheme obtained thereby is still within the protection scope required by the present invention. Based on the above embodiments, all other embodiments obtained by those skilled in the art without making creative work, that is, all modifications, equivalent substitutions and improvements made within the spirit and principles of this application, fall within the protection scope required by the present invention.

Claims

1. An acid mist absorption system on an electrolytic cell, characterized in that: include: A support (2), a flexible acid mist cover (3), a track (4), an exhaust pipe (7) and an induced draft fan (15): there are two tracks (4), the two tracks (4) are arranged in parallel, a limiting device is arranged at one opposite end of the two tracks (4), a groove is arranged above each track (4), a plurality of the supports (2) are movably placed in the grooves of the tracks (4), all the supports (2) are fixedly connected to the flexible acid mist cover (3), the length of the drooping parts of the flexible acid mist cover (3) in four directions is greater than the height of the supports (2), an exhaust pipe (7) is also arranged on the inner side of the track (4), the exhaust pipe (7) comprises a rectangular annular pipe and an induced draft pipe, the rectangular annular pipe and the induced draft pipe are vertically connected, the induced draft pipe is connected to the induced draft fan (15), and a plurality of air holes are arranged on the rectangular annular pipe.

2. The acid mist absorption system on an electrolytic cell according to claim 1, characterized in that: The limit device comprises a limiter (23), a pin (24) and a split pin (25); the limiter (23) is fixed to the end of the track (4) and is higher than the groove; a first through hole is provided on the side of the track (4) close to the limiter (23); the first through hole passes through the groove of the track (4); the pin (24) passes through the first through hole; the pin (24) is composed of a limit block and a pin rod fixedly connected; the size of the limit block is larger than the size of the first through hole; a second through hole is provided at the end of the pin rod away from the limit block and protruding out of the through hole; the split pin (25) passes through the second through hole; and at least one bracket (2) is provided between the limiter (23) and the pin (24).

3. The acid mist absorption system on an electrolytic cell according to claim 1, characterized in that: The flexible acid mist cover (3) is made of PVC acid-resistant cloth.

4. The acid mist absorption system on an electrolytic cell according to claim 1, characterized in that: The air holes are opened on the inner side or the upper side of the rectangular annular tube.

5. The acid mist absorption system on an electrolytic cell according to claim 1, characterized in that: The invention also comprises a reverse spray pump (16), a reverse spray head (17), a reverse spray pipe (18), a circulation pump (22) and an absorption tower, wherein the induced draft fan (15) is connected to the top of the reverse spray pipe (18), the reverse spray head (17) is located in the middle of the reverse spray pipe (18), the bottom of the reverse spray pipe (18) is connected to the absorption tower, a foam catching screen (19), an atomizing nozzle (20) and a filler (21) are arranged from top to bottom in the absorption tower, the filler (21) is located above the connection between the reverse spray pipe (18) and the absorption tower, circulating liquid is stored at the bottom of the absorption tower, the bottom of the absorption tower is connected to the atomizing nozzle (20) via the circulation pump (22), and the bottom of the absorption tower is connected to the reverse spray head (17) via the reverse spray pump (16).

6. An electrolytic cell system, comprising an electrolytic cell (1) and an acid mist absorption system according to any one of claims 1 to 5, characterized in that: Pads (12) are provided on both side walls of the electrolytic cell (1), a cathode (5) or an anode (8) is fixed on the pads (12), two rails (4) in the acid mist absorption system are respectively fixed on the outside of the pads (12), and the rectangular ring tube in the exhaust pipe (7) is fixed on the pads (12) and is located on the inside of the cathode (5) or the anode (8).

7. An electrolytic cell system according to claim 6, characterized in that: The electrolytic cell (1) further comprises a feed pipe (6), a feed port is provided on the feed pipe (6), the feed pipe (6) is fixed on the cushion block (12) and is located inside the cathode (5) or the anode (8), the rectangular ring tube in the exhaust pipe (7) is fixed on the inside of the feed pipe (6) and on the cushion block, and the feed port of the feed pipe (6) and the air holes of the rectangular ring tube are staggered.

8. An electrolytic cell system according to claim 6, characterized in that: The electrolytic cell is composed of at least two electrolytic cell bodies connected in series. The two rails (4) in the acid mist absorption system are respectively fixed to the outside of the pads (12) of the two outermost side walls. The rectangular annular tube in the exhaust pipe (7) is fixed to the pads (12) of the two outermost side walls and is located on the inner side of the cathode (5) or the anode (8). The rectangular annular tube is also provided with a plurality of exhaust branch pipes fixed to the inner side wall pads, and a plurality of air holes are also provided on the exhaust branch pipes.

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