A continuous electrochemical cyanide destruction device for cyanide-containing waste liquid

Abstract

The present invention discloses a device for continuous electrochemical cyanide breaking of cyanide-containing waste liquid. As a pretreatment process for cyanide breaking, the present invention has high cyanide breaking stability and can effectively reduce the amount of chemical reagents used in the treatment of high-concentration cyanide-containing waste liquid. The tail gas after electrolysis is absorbed by the tail gas treatment system, which solves the problem that the existing absorption tower has poor treatment effect on cyanide entrained in the tail gas. The first adjustment area and the second adjustment area provide a channel for gas movement, and the first adjustment component and the second adjustment component are used to adjust the channel area, thereby adjusting the speed of the tail gas passing through, avoiding the tail gas speed being too fast, and improving the treatment effect of cyanide. The spraying device cooperates with the adjustment device to align the spray plate with the opened first adjustment area or the second adjustment area, and fully spray the cyanide on the movement channel of the tail gas; at the same time, the main spray pipe and the annular spray pipe are used to form a multi-directional cross spray to avoid the existence of spray dead angles.

Description

Technical Field

[0001] The invention specifically relates to a device for continuous electrochemical destruction of cyanide from cyanide-containing waste liquid. Background Art

[0002] Because cyanide is a highly toxic substance, a very small amount of cyanide will kill people and livestock in a very short time. The allowable discharge concentration is 0.5 mg / L. Once it enters the water or soil, it will cause aquatic poisoning, crop yield reduction and other hazards. High-concentration cyanide waste liquid cannot be treated by biochemical methods. It can be treated by high-temperature incineration or heating hydrolysis, but they all consume a lot of energy, and there are many supporting facilities, complex operations, and high operating costs. In addition, chlorine oxidation can be used for treatment, but because chlorine needs to be hydrolyzed in water and has poor oxidation ability, for high-concentration cyanide waste liquid, the treatment time is long, the consumption of chlorine is large, and the reaction effect is easily affected by the pH and ammonia nitrogen concentration in the water. Therefore, it is of great practical significance to select appropriate treatment technology to completely decompose and remove cyanide. At present, electrolysis is usually used in the treatment of electroplating cyanide wastewater in China.

[0003] The electrolysis method is to electrolyze cyanide-containing wastewater under alkaline conditions. CN is oxidized at the anode to generate CNO-, and CNO- is further oxidized to CO2 and N2. At the anode, Cl- may also be oxidized to Cl2. After the generated Cl2 enters the solution, it reacts with water to generate HClO, which then chemically oxidizes the cyanide; metal or hydrogen is precipitated at the cathode. The advantage of this method is that cyanide is completely broken, CN- can be reduced to below 0.1 mg / L, the footprint is small, and the amount of sludge is small. The disadvantage is that cyanide is easily entrained in the nitrogen and hydrogen discharged during the electrolysis process. Usually, the cyanide entrained in the gas is treated by spraying in an absorption tower. However, since the gas is less obstructed in the absorption tower, the gas entrained with cyanide has a short residence time in the absorption tower, which affects the treatment effect of cyanide. Summary of the invention

[0004] The purpose of the present invention is to address the deficiencies of the prior art and provide a device for continuous electrochemical decyanation of cyanide-containing waste liquid.

[0005] The technical solution of the present invention to solve the above problems is: a continuous electrochemical cyanide breaking device for cyanide-containing waste liquid, comprising an electric cyanide breaking system for treating cyanide-containing waste liquid, and a tail gas treatment system connected to the electric cyanide breaking system through a conveying pipeline and used for treating cyanide-containing gas;

[0006] The electric cyanide breaking system includes a liquid storage tank for temporarily storing cyanide-containing waste liquid, an electric cyanide breaking reactor connected to the liquid storage tank through a first pipeline, and a rectifier for providing current to the electric cyanide breaking reactor;

[0007] The tail gas treatment system includes an absorption tower, an alkali solution tank connected to the absorption tower through a second pipeline;

[0008] The absorption tower comprises a shell, a plurality of regulating devices installed in the shell and distributed along the central axis of the shell, and a spraying device installed on the regulating device.

[0009] Furthermore, a feeding pump and a first valve are installed on the first pipeline; an alkali solution pump is installed on the second pipeline; and an induced draft fan is installed on the delivery pipeline.

[0010] Furthermore, a liquid inlet is provided on the top of the shell.

[0011] A liquid outlet is arranged at the bottom of the shell body, and the liquid outlet is communicated with the alkali liquid tank through a third pipeline.

[0012] An exhaust port is arranged at the upper part of the shell body, and an air inlet is arranged at the lower part of the shell body, and the air inlet is communicated with the delivery pipe.

[0013] Furthermore, the adjustment device includes a fixed plate coaxially arranged with the shell and having a circular structure, a first fixed ring installed on the fixed plate through a first support plate and coaxially arranged with the fixed plate, a support ring A installed on the top of the fixed plate, a support ring B installed on the first fixed ring, a first adjustment area is formed between the support ring A and the support ring B, a second fixed ring installed on the first fixed ring through a second support plate and coaxially arranged with the first fixed ring, a support ring C installed on the first fixed ring, a support ring D installed on the second fixed ring, a second adjustment area is formed between the support ring C and the support ring D, a first adjustment component installed in the first adjustment area and can be folded, and a second adjustment component installed in the second adjustment area and can be folded.

[0014] Furthermore, the diameter of the fixing plate is D1, the inner diameter of the first fixing ring is D2, the outer diameter of the first fixing ring is D3, and the inner diameter of the second fixing ring is D4;

[0015] The outer diameter of the support ring A is D5, D5=D1; the inner diameter of the support ring B is D6, D6=D2; the outer diameter of the support ring C is D7, D7=D3; the inner diameter of the support ring D is D8, D8=D4.

[0016] Furthermore, the first adjustment component and the second adjustment component have the same structure;

[0017] The first adjustment assembly includes a rotating shaft rotatably mounted on the first support plate through a rolling bearing, an adjustment motor mounted on the first support plate and having an output shaft connected to the rotating shaft, a starting rod mounted on the rotating shaft, a terminating member movably mounted in the first adjustment member, and a plurality of folding members movably mounted in the first adjustment area and arranged in a circular array around the central axis of the fixed plate, the folding member closest to the starting rod being hinged to one end of the starting rod, and the folding member closest to the terminating member being hinged to one end of the terminating member;

[0018] Two adjacent folding members are hinged and symmetrical about a line connecting a hinge point and a center of a fixed plate; the folding member comprises a first translation block movably mounted in a first adjustment area, a first rod hinged to the first translation block, a second translation block movably mounted in the first adjustment area, a second rod hinged to the second translation block and hinged to the first rod at one end, and the second rod and the first rod are symmetrical about a line connecting a hinge point and a center of a fixed plate;

[0019] The termination member includes a third translation block movably installed in the first adjustment area, a third rod hinged to the third translation block, a fourth translation block movably installed in the first adjustment area, a fourth rod hinged to the third translation block and hinged to the third rod at one end, and the fourth rod is symmetrical with the third rod about a line connecting a hinge point and a center of a circle of a fixed plate.

[0020] Furthermore, the first adjustment component also includes a flexible material arranged in the first adjustment area, one end of the flexible material is installed on the first support plate and the other end is installed on the fourth translation block, and the middle part of the flexible material is connected to multiple first translation blocks and second translation blocks; the first adjustment component is used to drive the flexible material to expand or close.

[0021] Furthermore, the flexible material is one of rubber and linoleum.

[0022] Furthermore, the support ring A is provided with a slide groove A, and the support ring B is provided with a slide groove B;

[0023] The first translation block is provided with a slider A which cooperates with the slide groove A, and the slider A is inserted into the slide groove A; the second translation block is provided with a slider B which cooperates with the slide groove B, and the slider B is inserted into the slide groove B;

[0024] The third translation block is provided with a slider C which cooperates with the slide groove C, and the slider C is inserted into the slide groove A; the fourth translation block is provided with a slider D which cooperates with the slide groove B, and the slider D is inserted into the slide groove.

[0025] Furthermore, the spray device includes a flat plate installed on the top of the fixed plate through a fixed column and coaxially arranged with the fixed plate, the flat plate is provided with a plurality of adjustment grooves arranged in a circular array around the central axis of the flat plate, a spray rod movably installed in the adjustment groove, a spray plate installed on the spray rod and having an arc-shaped structure, the spray plate and the fixed plate are coaxially arranged, a first gear rotatably installed on the top of the flat plate, the first gear is provided with a plurality of arc grooves arranged in a circular array around the central axis of the first gear, a driving column movably installed in the arc groove and connected to the spray rod at the bottom, a driving motor installed on the flat plate through a bracket, a second gear installed on the output shaft of the driving motor and meshing with the first gear, a plurality of main spray pipes installed on the spray rod and the spray plate, and a main spray nozzle installed on the main spray pipe.

[0026] Furthermore, the spray device also includes an annular spray pipe installed on the top of the support ring A, the support ring B, the support ring C, and the support ring D, and an auxiliary spray nozzle installed on the annular spray pipe.

[0027] Furthermore, the regulating motor outer cover has a protective shell, and the protective shell is installed on the first supporting plate.

[0028] Furthermore, the rectifier control voltage is 3-10V and the current density is 10A / dm 2 -13A / dm 2 .

[0029] Furthermore, the alkali solution tank contains sodium hydroxide solution.

[0030] The present invention has beneficial effects: as a pretreatment process for breaking cyanide, the present invention has high stability in breaking cyanide, can effectively reduce the amount of chemical reagents used in the treatment of high-concentration cyanide-containing waste liquid, and absorbs the tail gas after electrolysis through the tail gas treatment system, thereby solving the problem that the existing absorption tower has poor treatment effect on cyanide entrained in the tail gas. The first regulating area and the second regulating area provide a channel for the gas to move, and the first regulating component and the second regulating component are used to adjust the channel area of ​​the first regulating area and the second regulating area, thereby adjusting the speed of the gas passing through, avoiding excessive gas speed and insufficient contact with the sodium hydroxide solution, improving the treatment effect of cyanide, and ensuring that the cyanide is fully in contact with the sodium hydroxide solution. The spray device cooperates with the regulating device to align the spray plate with the opened first regulating area or the second regulating area, fully spray the cyanide on the movement channel of the gas, so that the cyanide is fully in contact with the sodium hydroxide solution; at the same time, the main spray pipe and the annular spray pipe are used to form a multi-directional cross spray to avoid the existence of a spray dead angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the structure of the present invention;

[0032] Figure 2 It is a cross-sectional view of the electric cyanide breaking reactor of the present invention;

[0033] Figure 3 It is a cross-sectional view of the absorption tower of the present invention;

[0034] Figure 4 A top view of the adjusting device of the present invention;

[0035] Figure 5 A bottom view of the adjusting device of the present invention;

[0036] Figure 6 This is a schematic diagram of the distribution of the first adjustment component and the second adjustment component in the first adjustment area and the second adjustment area of ​​the present invention;

[0037] Figure 7It is a bottom view of the first adjustment component of the present invention after it is unfolded;

[0038] Figure 8 This is a front view of the spray device of the present invention;

[0039] Fig. 9 A top view of the spray device of the present invention;

[0040] Fig.10 It is a bottom view of the spray device of the present invention.

[0041] In the figure:

[0042] 1-electric cyanide breaking system, 2-transport pipeline, 3-tail gas treatment system, 4-induced draft fan, 5-liquid storage tank, 6-electric cyanide breaking reactor, 7-rectifier, 8-feeding pump, 9-electrolysis cylinder, 10-cathode plate, 11-electrode bracket, 12-anode plate, 13-feed port, 14-drain port, 15-exhaust port, 16-absorption tower, 17-alkali liquid tank, 18-shell, 19-adjusting device, 20-spraying device, 21-liquid inlet, 22-liquid outlet, 23-gas outlet, 24-gas inlet, 25-fixed plate, 26-first fixed ring, 27-support ring A, 28-support ring B, 29-first adjustment zone, 30-second fixed ring, 31-support ring C, 32-support ring D, 33 -The second adjustment area, 34-the first adjustment component, 35-the second adjustment component, 36-the rotating shaft, 37-the adjusting motor, 38-the starting rod, 39-the ending piece, 40-the folding piece, 41-the first translation block, 42-the first rod, 43-the second translation block, 44-the second rod, 45-the third translation block, 46-the third rod, 47-the fourth translation block, 48-the fourth rod, 50-the fixing column, 51-the flat plate, 52-the adjusting groove, 53-the spray rod, 54-the spray plate, 55-the first gear, 56-the arc groove, 57-the driving column, 58-the driving motor, 59-the second gear, 60-the main spray pipe, 61-the main spray nozzle, 62-the annular spray pipe, 63-the auxiliary spray nozzle, 64-the infusion tube. DETAILED DESCRIPTION

[0043] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation methods.

[0044] A continuous electrochemical cyanide breaking device for cyanide-containing waste liquid comprises an electric cyanide breaking system 1 for treating cyanide-containing waste liquid, a tail gas treatment system 3 connected to the electric cyanide breaking system 1 through a conveying pipeline 2 and used for treating cyanide-containing gas, and an induced draft fan 4 is installed on the conveying pipeline 2.

[0045] The electric cyanide breaking system 1 comprises a liquid storage tank 5 for temporarily storing cyanide-containing waste liquid, an electric cyanide breaking reactor 6 connected to the liquid storage tank 5 through a first pipeline, and a rectifier 7 for providing current to the electric cyanide breaking reactor 6; a feed pump 8 and a first valve are installed on the first pipeline;

[0046] The electric cyanide breaking reactor 6 in this application is a purchased part, and its specific working principle and structure are prior art, which will not be described in detail in this application. The electric cyanide breaking reactor 6 includes an electrolytic cylinder 9, a cathode plate 10 installed on the inner wall of the electrolytic cylinder 9, an electrode bracket 11 installed at the bottom of the electrolytic cylinder 9, and an anode plate 12 installed on the electrode bracket 11 and coaxially arranged with the electrolytic cylinder 9. The lower part of the electrolytic cylinder 9 is provided with a feed inlet 13 and a sewage outlet 14, and the top of the electrolytic cylinder 9 is provided with an exhaust port 15; the positive electrode of the rectifier 7 is electrically connected to the anode plate 12, and the negative electrode of the rectifier 7 is electrically connected to the cathode plate 10. The material of the anode plate 12 is titanium plated with ruthenium, and the material of the cathode plate 10 is titanium.

[0047] The control voltage of rectifier 7 is 3-10V, and the current density is 10A / dm 2 -13A / dm 2 .

[0048] The tail gas treatment system 3 includes an absorption tower 16, an alkali liquid tank 17 connected to the absorption tower 16 through a second pipeline, the alkali liquid tank 17 contains a sodium hydroxide solution, and an alkali liquid pump is installed on the second pipeline;

[0049] The absorption tower 16 includes a shell 18 , a plurality of adjustment devices 19 installed in the shell 18 and distributed along the central axis of the shell 18 , and a spray device 20 installed on the adjustment device 19 .

[0050] The top of the shell 18 is provided with a liquid inlet 21, the bottom of the shell 18 is provided with a liquid outlet 22, and the liquid outlet 22 is connected to the alkali liquid tank 17 through a third pipeline. The upper part of the shell 18 is provided with an air outlet 23, and the lower part of the shell 18 is provided with an air inlet 24, which is connected to the delivery pipe.

[0051] By introducing sodium hydroxide solution into the cyanide-containing wastewater in the liquid storage tank 5, the cyanide-containing wastewater is pretreated to adjust the pH value in the cyanide-containing wastewater; then the cyanide-containing wastewater after adjusting the pH value is sent to the electric cyanide breaking reactor 6, the rectifier 7 is turned on, and electrolysis is started. The titanium-plated ruthenium is used as the anode and the titanium is used as the cathode. The direct current between the plates is used to make the cyanide ions and some heavy metal ions in the cyanide-containing wastewater undergo an electrochemical reaction. Under alkaline conditions, the cyanide ions are oxidized to cyanate by the hydroxide generated by the anode, and the cyanate is hydrolyzed into carbonate and ammonia. During further electrolysis, the cyanide is completely oxidized and decomposed into carbonate and nitrogen; in the cathode area, the noble metals and some noble metal ions are reduced to single substances by electrons. After the electrolysis is completed, the wastewater is discharged. At the same time, nitrogen and hydrogen are generated during the electrolysis process. The tail gas treatment system 3 is used to absorb the cyanide entrained in the gas and then discharge it into the atmosphere to avoid pollution to the atmosphere.

[0052] The adjusting device 19 includes a fixed plate 25 which is coaxially arranged with the shell 18 and has a circular structure, a first fixed ring 26 which is installed on the fixed plate 25 through a first support plate and is coaxially arranged with the fixed plate 25, a support ring A27 which is installed on the top of the fixed plate 25, a support ring B28 which is installed on the first fixed ring 26, a first adjustment area 29 is formed between the support ring A27 and the support ring B28, a second fixed ring 30 which is installed on the first fixed ring 26 through a second support plate and is coaxially arranged with the first fixed ring 26, a support ring C31 which is installed on the first fixed ring 26, a support ring D32 which is installed on the second fixed ring 30, a second adjustment area 33 is formed between the support ring C31 and the support ring D32, a first adjustment component 34 which is installed in the first adjustment area 29 and is foldable, and a second adjustment component 35 which is installed in the second adjustment area 33 and is foldable.

[0053] The diameter of the fixed plate 25 is D1, the inner diameter of the first fixed ring 26 is D2, the outer diameter of the first fixed ring 26 is D3, and the inner diameter of the second fixed ring 30 is D4; the outer diameter of the support ring A27 is D5, D5=D1; the inner diameter of the support ring B28 is D6, D6=D2; the outer diameter of the support ring C31 is D7, D7=D3; the inner diameter of the support ring D32 is D8, D8=D4.

[0054] The first adjustment assembly 34 has the same structure as the second adjustment assembly 35; the first adjustment assembly 34 includes a rotating shaft 36 rotatably mounted on the first support plate through a rolling bearing, an adjustment motor 37 mounted on the first support plate and having an output shaft connected to the rotating shaft 36, a starting rod 38 mounted on the rotating shaft 36, a terminating member 39 movably mounted in the first adjustment member, and a plurality of folding members 40 movably mounted in the first adjustment area 29 and arranged in a circular array around the central axis of the fixed plate 25, the folding member 40 closest to the starting rod 38 is hinged to one end of the starting rod 38, and the folding member 40 closest to the terminating member 39 is hinged to one end of the terminating member 39;

[0055] Two adjacent folding members 40 are hinged and symmetrical about the line connecting the hinge point and the center of the fixed plate 25; the folding member 40 includes a first translation block 41 movably installed in the first adjustment area 29, a first rod 42 hinged to the first translation block 41, a second translation block 43 movably installed in the first adjustment area 29, and a second rod 44 hinged to the second translation block 43 and hinged to the first rod 42 at one end, and the second rod 44 and the first rod 42 are symmetrical about the line connecting the hinge point and the center of the fixed plate 25;

[0056] The termination member 39 includes a third translation block 45 movably installed in the first adjustment area 29, a third rod 46 hinged to the third translation block 45, a fourth translation block 47 movably installed in the first adjustment area 29, and a fourth rod 48 hinged to the third translation block 45 and hinged to the third rod 46 at one end, and the fourth rod 48 is symmetrical with the third rod 46 about the line connecting the hinge point and the center of the fixed plate 25.

[0057] The first adjustment component 34 also includes a flexible material (not shown in the figure) arranged in the first adjustment area 29. The flexible material is rubber. One end of the flexible material is installed on the first support plate and the other end is installed on the fourth translation block 47. The middle part of the flexible material is connected to multiple first translation blocks 41 and second translation blocks 43. The first adjustment component 34 is used to drive the flexible material to expand or close.

[0058] A slide groove A is provided on the support ring A27, and a slide groove B is provided on the support ring B28; a slider A that cooperates with the slide groove A is installed on the first translation block 41, and the slider A is inserted into the slide groove A; a slider B that cooperates with the slide groove B is installed on the second translation block 43, and the slider B is inserted into the slide groove B; a slider C that cooperates with the slide groove C is installed on the third translation block 45, and the slider C is inserted into the slide groove A; a slider D that cooperates with the slide groove B is installed on the fourth translation block 47, and the slider D is inserted into the slide groove.

[0059] The first regulating zone 29 and the second regulating zone 33 are used to provide a channel for the gas to move, and the first regulating component 34 and the second regulating component 35 are used to adjust the channel area of ​​the first regulating zone 29 and the second regulating zone 33, so as to adjust the speed of the exhaust gas passing therethrough, avoid the exhaust gas speed being too fast and insufficient contact with the sodium hydroxide solution, improve the treatment effect of the cyanide-containing substance, and ensure that the cyanide-containing substance is in full contact with the sodium hydroxide solution.

[0060] In actual use, two adjacent regulating devices 19 can be opened alternately as needed, that is, one regulating device 19 opens the first regulating area 29 and closes the second regulating area 33, and the other regulating device 19 closes the first regulating area 29 and opens the second regulating area 33, thereby setting an alternate channel to further reduce the speed of the exhaust gas.

[0061] The first adjustment component 34 drives the starting rod 38 to rotate through the adjustment motor 37, and the starting rod 38 drives the first rod 42 and the second rod 44 to rotate, and the multiple folding parts 40 move. The first translation block 41 and the second translation block 43 slide along the first adjustment area 29, driving the end piece 39 to move, and the third translation block 45 and the fourth translation block 47 slide along the first adjustment area 29, so that the first adjustment component 34 is unfolded, the flexible material is unfolded, and the first adjustment area 29 is closed.

[0062] The spray device 20 includes a flat plate 51 mounted on the top of the fixed plate 25 through a fixed column 50 and coaxially arranged with the fixed plate 25, a plurality of adjustment grooves 52 arranged in a circular array around the central axis of the flat plate 51 are provided on the flat plate 51, a spray rod 53 movably mounted in the adjustment groove 52, a spray plate 54 installed on the spray rod 53 and having an arc-shaped structure, the spray plate 54 is coaxially arranged with the fixed plate 25, a first gear 55 rotatably mounted on the top of the flat plate 51, a plurality of arc grooves 56 arranged in a circular array around the central axis of the first gear 55 are provided on the first gear 55, a driving column 57 movably installed in the arc groove 56 and connected to the spray rod 53 at the bottom, a driving motor 58 mounted on the flat plate 51 through a bracket, a second gear 59 mounted on the output shaft of the driving motor 58 and meshing with the first gear 55, a plurality of main spray pipes 60 mounted on the spray rod 53 and the spray plate 54, and a main spray nozzle 61 mounted on the main spray pipe 60.

[0063] A pair of slots are provided in the adjusting groove 52 , and plug posts that cooperate with the slots are installed on the spray rod 53 , and the plug posts are inserted into the slots.

[0064] The spray device 20 also includes an annular spray pipe 62 installed on the top of the support ring A27, the support ring B28, the support ring C31, and the support ring D32, and an auxiliary spray nozzle 63 installed on the annular spray pipe 62; a plurality of infusion pipes 64 are installed in the shell 18, the infusion pipe 64 is connected to the second pipeline, and the main spray pipe 60 and the annular spray pipe 62 are both connected to the infusion pipe 64.

[0065] By using the spray device 20 in cooperation with the regulating device 19, the spray plate 54 is aligned with the opened first regulating area 29 or the second regulating area 33, and the cyanide is fully sprayed on the movement channel of the exhaust gas to make the cyanide fully contact with the sodium hydroxide solution; at the same time, the spray rod 53 and the multiple spray nozzles on the support ring A27, support ring B28, support ring C31, and support ring D32 are used to form a multi-directional cross spray to avoid the existence of spray dead corners.

[0066] The second gear 59 is driven to rotate by the driving motor 58 , and the second gear 59 is meshed with the first gear 55 , driving the spray rod 53 to move along the adjustment slot 52 , thereby adjusting the extension distance of the spray rod 53 and the spray plate 54 .

[0067] The regulating motor 37 and the driving motor 58 are both covered with protective shells.

[0068] Many other changes and modifications may be made without departing from the concept and scope of the present invention.It should be understood that the present invention is not limited to the specific embodiments, and the scope of the present invention is defined by the appended claims.

Claims

1. A continuous electrochemical cyanide destruction device for cyanide-containing wastewater, characterized in that: The invention comprises an electric cyanide breaking system (1) for treating cyanide-containing waste liquid, and a tail gas treatment system (3) connected to the electric cyanide breaking system (1) through a delivery pipeline (2) and used for treating cyanide-containing gas; The electric cyanide destruction system (1) comprises a liquid storage tank (5) for temporarily storing cyanide-containing waste liquid, an electric cyanide destruction reactor (6) connected to the liquid storage tank (5) through a first pipeline, and a rectifier (7) for providing current to the electric cyanide destruction reactor (6); The tail gas treatment system (3) includes an absorption tower (16), and an alkaline solution tank (17) connected to the absorption tower (16) through a second pipeline; The absorption tower (16) includes a shell (18), a plurality of regulating devices (19) installed in the shell (18) and distributed along the central axis of the shell (18), and a spraying device (20) installed on the regulating device (19); The housing (18) is provided with a liquid inlet (21) at the top; a liquid outlet (22) is provided at the bottom of the housing (18), and the liquid outlet (22) is communicated with the alkali liquid tank (17) through a third pipe; an air outlet (23) is provided at the top of the housing (18), and an air inlet is provided at the bottom of the housing (18), and the air inlet is communicated with the delivery pipe; The regulating device (19) comprises a circular fixed plate (25) coaxially arranged with the housing (18), a first fixed ring (26) mounted on the fixed plate (25) via a first support plate and coaxially arranged with the fixed plate (25), and a support ring A mounted on the top of the fixed plate (25). (27), a support ring B (28) mounted on the first fixing ring (26), a first adjustment area (29) formed between the support ring A (27) and the support ring B (28), a second fixing ring (30) mounted on the first fixing ring (26) through a second support plate and coaxially arranged with the first fixing ring (26), a support ring C (31) mounted on the first fixing ring (26), a support ring D (32) mounted on the second fixing ring (30), a second adjustment area (33) formed between the support ring C (31) and the support ring D (32), a first adjustment component (34) mounted in the first adjustment area (29) and foldable, and a second adjustment component (35) mounted in the second adjustment area (33) and foldable.

2. A continuous electrochemical cyanide destruction device for cyanide-containing waste liquid according to claim 1, characterized in that: A feeding pump (8) and a first valve are installed on the first pipeline; an alkali liquid pump is installed on the second pipeline; and an induced draft fan (4) is installed on the delivery pipeline (2).

3. A continuous electrochemical cyanide destruction device for cyanide-containing waste liquid according to claim 1, characterized in that: The diameter of the fixing plate (25) is D1, the inner diameter of the first fixing ring (26) is D2, the outer diameter of the first fixing ring (26) is D3, and the inner diameter of the second fixing ring (30) is D4; The outer diameter of the support ring A (27) is D5, D5=D1; the inner diameter of the support ring B (28) is D6, D6=D2; the outer diameter of the support ring C (31) is D7, D7=D3; and the inner diameter of the support ring D (32) is D8, D8=D4.

4. A continuous electrochemical cyanide destruction device for cyanide-containing wastewater according to claim 3, characterized in that: The first adjustment component (34) and the second adjustment component (35) have the same structure; The first adjustment assembly (34) includes a rotating shaft (36) rotatably mounted on the first support plate via a rolling bearing, an adjustment motor (37) mounted on the first support plate and having an output shaft connected to the rotating shaft (36), a starting rod (38) mounted on the rotating shaft (36), a terminating member (39) movably mounted in the first adjustment member, and a plurality of folding members (40) movably mounted in the first adjustment area (29) and arranged in an annular array around the central axis of the fixed plate (25), the folding member (40) closest to the starting rod (38) being hinged to one end of the starting rod (38), and the folding member (40) closest to the terminating member (39) being hinged to one end of the terminating member (39); Two adjacent folding members (40) are hinged and symmetrical about a line connecting a hinge point and a center of a fixed plate (25); the folding member (40) comprises a first translation block (41) movably mounted in a first adjustment area (29), a first rod (42) hinged to the first translation block (41), a second translation block (43) movably mounted in the first adjustment area (29), a second rod (44) hinged to the second translation block (43) and one end of which is hinged to the first rod (42); the second rod (44) and the first rod (42) are symmetrical about a line connecting a hinge point and a center of a fixed plate (25); The terminating member (39) includes a third translation block (45) movably mounted in the first adjustment area (29), a third rod (46) hinged to the third translation block (45), a fourth translation block (47) movably mounted in the first adjustment area (29), and a fourth rod (48) hinged to the third translation block (45) and hinged at one end to the third rod (46), wherein the fourth rod (48) and the third rod (46) are symmetrical about a line connecting a hinge point and a center of a fixed plate (25).

5. A continuous electrochemical cyanide destruction device for cyanide-containing waste liquid according to claim 4, characterized in that: The first adjustment component (34) also includes a flexible material arranged in the first adjustment area (29), one end of the flexible material is mounted on the first support plate and the other end is mounted on the fourth translation block (47), and the middle portion of the flexible material is connected to the plurality of first translation blocks (41) and the second translation blocks (43); the first adjustment component (34) is used to drive the flexible material to expand or close.

6. The continuous electrochemical cyanide destruction device for cyanide-containing wastewater according to claim 5, characterized in that: The flexible material is one of rubber and linoleum.

7. The continuous electrochemical cyanide destruction device for cyanide-containing wastewater according to claim 4, characterized in that: The support ring A (27) is provided with a slide groove A, and the support ring B (28) is provided with a slide groove B; The first translation block (41) is provided with a slider A that cooperates with the chute A, and the slider A is inserted into the chute A; the second translation block (43) is provided with a slider B that cooperates with the chute B, and the slider B is inserted into the chute B; The third translation block (45) is provided with a slider C which cooperates with the chute C, and the slider C is inserted into the chute A; the fourth translation block (47) is provided with a slider D which cooperates with the chute B, and the slider D is inserted into the chute.

8. The continuous electrochemical cyanide destruction device for cyanide-containing wastewater according to claim 1, characterized in that: The spray device (20) includes a flat plate (51) mounted on the top of a fixed plate (25) through a fixed column (50) and coaxially arranged with the fixed plate (25), a plurality of adjustment slots (52) arranged in a ring array around the central axis of the flat plate (51) are provided on the flat plate (51), a spray rod (53) movably mounted in the adjustment slot (52), a spray plate (54) with an arc-shaped structure mounted on the spray rod (53), the spray plate (54) being coaxially arranged with the fixed plate (25), and a first gear (55) rotatably mounted on the top of the flat plate (51), the first gear The wheel (55) is provided with a plurality of arc grooves (56) arranged in a circular array around the central axis of the first gear (55), a driving column (57) is movably installed in the arc groove (56) and the bottom of which is connected to the spray rod (53), a driving motor (58) is installed on the flat plate (51) through a bracket, a second gear (59) is installed on the output shaft of the driving motor (58) and meshed with the first gear (55), a plurality of main spray pipes (60) are installed on the spray rod (53) and the spray plate (54), and a main spray nozzle (61) is installed on the main spray pipe (60); The spraying device (20) further comprises an annular spraying pipe (62) installed on the top of the support ring A (27), the support ring B (28), the support ring C (31), and the support ring D (32), and an auxiliary spraying nozzle (63) installed on the annular spraying pipe (62).

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