A device for treating cyanide-containing wastewater

Abstract

The invention discloses a cyanide-containing wastewater treatment device, belonging to the field of cyanide-containing wastewater treatment. The device comprises a treatment container, the treatment container comprises a treatment tank, the middle part of the treatment tank is connected with an isolation plate, the upper part of the isolation plate is a first-stage reaction chamber, and the lower part is a second-stage reaction chamber, two pH value adjustment mechanisms are connected to the outer wall of the treatment tank, the pH value adjustment mechanism comprises a first piston cylinder and a second piston cylinder, a first piston plate and a second piston plate are respectively slidably connected in the first piston cylinder and the second piston cylinder, the first piston plate and the second piston plate slide synchronously, a driving plate and a metering plate are slidably connected in the metering cylinder, and the second piston plate drives the metering plate to move downward when sliding, so that the volume between the metering plate and the driving plate is equal to the delivery amount of the adjustment agent; the invention accumulates the addition amount of the pH value adjustment agent by controlling the downward movement of the metering plate, so that when the subsequent adjustment is performed, a sufficient amount of the pH value adjustment agent is added at one time.

Description

Technical Field

[0001] The invention relates to the technical field of cyanide-containing wastewater treatment, in particular to a cyanide-containing wastewater treatment device. Background Art

[0002] Alkaline chlorination is a treatment method that uses chlorine-based oxidants (such as chlorine, sodium hypochlorite, bleaching powder, etc.) to oxidize cyanide in wastewater into non-toxic or low-toxic substances under alkaline conditions. This method is a common and mature technology for treating cyanide-containing wastewater, and is widely used in electroplating, metallurgy, chemical industry and other industries.

[0003] The process of alkaline chlorination method for breaking cyanide is mainly divided into two stages:

[0004] 1. Incomplete oxidation stage: In this stage, cyanide (CN-) in the wastewater reacts with chlorine-based oxidants under alkaline conditions to first generate cyanogen chloride (CNCl), and then CNCl is further hydrolyzed to generate cyanate (CNO-). The reaction rate at this stage is affected by pH value, temperature and effective chlorine concentration. The higher the pH value, the higher the temperature and the higher the effective chlorine concentration, the faster the hydrolysis rate.

[0005] 2. Complete oxidation stage: In the second stage, cyanate is further oxidized and decomposed into carbon dioxide (CO2) and nitrogen (N2) under the action of the continued addition of chlorine-based oxidants. The reaction rate in this stage is affected in the opposite direction by the pH value, that is, the reaction rate is faster when the pH value is lower.

[0006] When the amount of cyanide-containing wastewater is too large, the existing treatment tank cannot complete the treatment at one time, so it needs to be treated in batches of equal volume. Since the same batch of cyanide-containing wastewater has the same composition, the amount of adjusting reagent and cyanide-breaking reagent used each time to adjust its pH value and break the cyanide is equal. Therefore, it is only necessary to measure the amount of reagent used for the first time, and the amount of added reagents when treating wastewater of the same specification is equal. In the prior art, a flow meter can be used to detect the amount of pH value adjusting reagent added, so as to obtain the actual amount required to be added. However, the influence of acidic or alkaline liquid on the flow meter is significant, which may not only lead to inaccurate measurement results, but also seriously corrode the flow meter, causing damage to the flow meter. Therefore, the amount of reagent added can only be detected by manual measurement at present, so that when the cyanide-containing wastewater of the same specification is treated in batches, the reagent cannot be added quickly to adjust the pH value. Summary of the invention

[0007] The object of the present invention is to provide a cyanide-containing wastewater treatment device, which solves the problem that reagents cannot be added quickly to adjust the pH value when cyanide-containing wastewater of the same specification is treated in batches.

[0008] To achieve the above-mentioned object, the present invention provides the following technical solution: a cyanide-containing wastewater treatment device, comprising a treatment container, the treatment container comprising a treatment tank, the middle of the treatment tank is connected with an isolation plate, the upper part of the isolation plate is a first-stage reaction chamber, and the lower part is a second-stage reaction chamber, and the outer wall of the treatment tank is connected with two pH value adjustment mechanisms, and the two pH value adjustment mechanisms are respectively connected to the first-stage reaction chamber and the second-stage reaction chamber;

[0009] The pH value adjustment mechanism includes a first piston cylinder and a second piston cylinder, wherein a first piston plate and a second piston plate are respectively slidably connected in the first piston cylinder and the second piston cylinder, and the first piston plate and the second piston plate slide synchronously. A metering cylinder is connected to the outer wall of the processing tank, and a driving plate and a metering plate are slidably connected in the metering cylinder. When the first piston plate slides, the adjusting reagent is transported into the processing tank, and when the second piston plate slides, the metering plate is driven downward, so that the volume between the metering plate and the driving plate is equal to the transport amount of the adjusting reagent.

[0010] Preferably, the pH value adjustment mechanism further comprises a first cylinder, and the first piston plate and the second piston plate are commonly connected to a cylinder rod of the first cylinder;

[0011] The outer wall of the processing tank is connected to a passive cylinder, and an exhaust pipe is connected between the passive cylinder and the second piston cylinder. After each up and down sliding of the first piston plate, the second piston plate slides synchronously, so that the second piston cylinder extracts the medium in the passive cylinder, causing the metering plate to move downward, so that the volume between the driving plate and the metering plate is equal to the volume of the regulating reagent.

[0012] Preferably, an extraction pipe and a discharge pipe are connected to the metering plate, both the extraction pipe and the discharge pipe are provided with a one-way valve, and the extraction pipe is connected to a regulating reagent supply, and the discharge pipe is connected to the processing tank.

[0013] Preferably, the processing tank is connected to a second cylinder, and the output end of the second cylinder is connected to the driving plate;

[0014] After the pH value in the treatment tank is adjusted, the volume between the metering plate and the driving plate is equal to the volume of the regulating reagent pumped out by the first piston cylinder;

[0015] After the cyanide-containing wastewater of the same specification is injected into the treatment tank again, the first cylinder stops running, and the second cylinder expands and contracts once, so that the metering cylinder extracts a sufficient amount of the regulating reagent and injects the regulating reagent into the treatment tank.

[0016] Preferably, the processing container further comprises a rotating shaft, a stirring rod is connected to the rotating shaft, and the stirring rod rotates in the processing tank.

[0017] Preferably, a driving rod is slidably connected in the rotating shaft, a control plate is connected to the top of the driving rod, and the control plate is located at the bottom of the isolation plate;

[0018] The lower surface of the isolation plate and the upper surface of the control plate are both provided with protrusions, and the isolation plate and the control plate are respectively provided with sockets that cooperate with the protrusions. When the driving rod slides down, the control plate moves down, so that the protrusion of the isolation plate pulls out the socket on the control plate, and the protrusion of the control plate pulls out the socket on the isolation plate, so that the cyanide-containing wastewater is transferred from the first-stage reaction chamber to the second-stage reaction chamber.

[0019] Preferably, it further comprises an adding mechanism, wherein the adding mechanism comprises a first material taking barrel, and the first material taking barrel is connected to the first-stage reaction chamber through a first feeding pipe;

[0020] A push plate and a pressure plate are slidably connected in the first material taking barrel, and bleaching powder is filled between the push plate and the pressure plate. After the pressure plate moves up to the upper part of the first feed pipe, the push plate moves up, so that the push plate pushes the bleaching powder to the first feed pipe, so that the bleaching powder enters the first-stage reaction chamber through the first feed pipe. After the first-stage reaction is completed, the push plate stops moving up and the upward movement stroke of the push plate is recorded.

[0021] Preferably, the outside of the processing tank is connected to a third cylinder, the output end of the third cylinder is connected to the push plate, the first feeding tube is connected to the first feeding tube, the first feeding tube is connected to the bleaching powder supply place, the first feeding tube is provided with a first switch valve, and the connection port of the first feeding tube and the first feeding tube is located below the connection port of the first feeding tube and the first feeding tube;

[0022] When the third cylinder contracts to move the push plate downward, the first switch valve opens to allow the bleaching powder to enter the first material barrel; and when the third cylinder extends to move the push plate upward, the first switch valve closes to allow the bleaching powder to be discharged from the first material barrel through the first feeding pipe.

[0023] Preferably, the adding mechanism further comprises a second material taking barrel, and the second material taking barrel is connected with the second-stage reaction chamber through a second feeding pipe;

[0024] A vertical plate is slidably connected to the side wall of the second material taking barrel, and a second feeding pipe and a limit plate are connected to the vertical plate. The limit plate is located above the opening where the second feeding pipe and the vertical plate are connected. When the push plate moves up, the vertical plate moves up synchronously, so that the space below the limit plate in the second material taking barrel can accommodate bleaching powder equal to the discharge amount in the first material taking barrel;

[0025] A second switch valve is arranged in the second feeding pipe, and a third switch valve is arranged in the second feeding pipe. When the limit plate moves up, the third switch valve is closed and the second switch valve is opened. Moreover, after the limit plate is stationary, when the driving rod moves down, the third switch valve is opened and the second switch valve is closed. When the driving rod moves up, the third switch valve is closed and the second switch valve is opened.

[0026] Preferably, the cylinder rod of the third cylinder is connected to the first connecting rod, the second feeding pipe is connected to the second connecting rod, an electromagnet is connected between the first connecting rod and the second connecting rod, and after the upward movement stroke of the push plate is recorded, the electromagnet is powered off to allow the second feeding pipe to maintain its position.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. The present invention allows the cylinder rod of the first cylinder to drive the second piston plate to move up synchronously while the first cylinder is extended, so that the second piston cylinder discharges air to the passive cylinder through the exhaust pipe, so that the passive cylinder can be shortened. When the passive cylinder is shortened, the metering plate descends. At this time, there is a gap between the metering plate and the driving plate. The space formed by the gap can just hold the amount of alkaline solution discharged by the second pipeline at one time when the first piston plate moves up. After the first piston plate moves up a stroke each time, the metering plate will move down by an equal distance, that is, the first piston plate moves down once, and the space between the driving plate and the metering plate is one times the volume of the first piston cylinder. If it moves down twice, it is twice the volume, and so on, so that the amount of alkaline solution added can be measured, and the downward movement of the metering plate is controlled to accumulate the amount of pH adjusting agent added, so that when the subsequent adjustment is performed, a sufficient amount of pH adjusting agent is added at one time, thereby improving the efficiency of batch treatment of cyanide-containing wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 It is a schematic diagram of the structure of the processing container of the present invention;

[0031] Figure 3 It is a schematic diagram of the structure of the convex block of the present invention;

[0032] Figure 4It is a structural schematic diagram of the driving rod of the present invention;

[0033] Figure 5 It is a structural schematic diagram of the pH value adjustment mechanism of the present invention;

[0034] Figure 6 It is a structural schematic diagram of the metering plate of the present invention;

[0035] Figure 7 It is a structural schematic diagram of the adding mechanism of the present invention;

[0036] Figure 8 It is a structural schematic diagram of the electromagnet of the present invention.

[0037] In the figure: 1, treatment container; 11, treatment tank; 12, isolation plate; 13, control plate; 14, bump; 15, rotating shaft; 16, stirring rod; 17, driving rod; 2, pH value adjustment mechanism; 21, first cylinder; 22, first piston cylinder; 221, first pipeline; 222, second pipeline; 23, first piston plate; 24, second piston cylinder; 241, suction pipe; 242, exhaust pipe; 25, second piston plate; 26, passive cylinder; 261, metering plate; 262, extraction pipe; 263, discharge pipe; 2 7. Measuring cylinder; 28. Second cylinder; 281. Drive plate; 3. Adding mechanism; 31. Third cylinder; 311. First connecting rod; 312. Second connecting rod; 313. Electromagnet; 32. First material taking cylinder; 33. Pushing plate; 34. First feeding pipe; 341. First switch valve; 35. First feeding pipe; 36. Pressing plate; 37. Second material taking cylinder; 371. Second feeding pipe; 372. Third switch valve; 38. Vertical plate; 381. Second feeding pipe; 382. Second switch valve; 383. Limit plate. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] Reference Figure 1-Figure 8, the present embodiment provides a technical solution: a cyanide-containing wastewater treatment device, comprising a treatment container 1, the treatment container 1 comprises a treatment tank 11, an isolation plate 12 is connected to the middle of the treatment tank 11, the upper part of the isolation plate 12 is a first-stage reaction chamber, and the lower part is a second-stage reaction chamber, two pH value adjustment mechanisms 2 are connected to the outer wall of the treatment tank 11, and the two pH value adjustment mechanisms 2 are respectively connected to the first-stage reaction chamber and the second-stage reaction chamber; the pH value adjustment mechanism 2 comprises a first piston cylinder 22 and a second piston cylinder 24, a first piston plate 23 and a second piston plate 25 are respectively slidably connected in the first piston cylinder 22 and the second piston cylinder 24, the first piston plate 23 and the second piston plate 25 slide synchronously, a metering cylinder 27 is connected to the outer wall of the treatment tank 11, a driving plate 281 and a metering plate 261 are slidably connected in the metering cylinder 27, the first piston plate 23 slides to deliver the regulating reagent to the treatment tank 11 when sliding, and the second piston plate 25 drives the metering plate 261 to move downward when sliding, so that the volume between the metering plate 261 and the driving plate 281 is equal to the delivery amount of the regulating reagent.

[0040] The pH value adjustment mechanism 2 also includes a first cylinder 21, a first piston plate 23 and a second piston plate 25 which are commonly connected to the cylinder rod of the first cylinder 21; the outer wall of the treatment tank 11 is connected to a passive cylinder 26, and an exhaust pipe 242 is connected between the passive cylinder 26 and the second piston cylinder 24. After each up and down slide of the first piston plate 23, the second piston plate 25 slides synchronously, so that the second piston cylinder 24 extracts the medium in the passive cylinder 26, causing the metering plate 261 to move downward, so that the volume between the driving plate 281 and the metering plate 261 is equal to the volume of the adjustment reagent.

[0041] The metering plate 261 is connected to an extraction pipe 262 and a discharge pipe 263 , both of which are provided with a one-way valve. The extraction pipe 262 is connected to the regulating reagent supply, and the discharge pipe 263 is connected to the processing tank 11 .

[0042] A second cylinder 28 is connected to the treatment tank 11, and the output end of the second cylinder 28 is connected to the driving plate 281; after the pH value in the treatment tank 11 is adjusted, the volume between the metering plate 261 and the driving plate 281 is equal to the volume of the regulating agent pumped out by the first piston cylinder 22; after the same specification of cyanide-containing wastewater is injected into the treatment tank 11 again, the first cylinder 21 stops running, and the second cylinder 28 is extended and retracted once, so that the metering cylinder 27 extracts a sufficient amount of regulating agent and injects the regulating agent into the treatment tank 11.

[0043] How to determine the amount of pH adjustment reagent to be added, specifically:

[0044] When treating cyanide-containing wastewater, the wastewater is first added into the treatment tank 11 (a feeding port is provided on the treatment tank 11, which is not shown in the figure). The first-stage reaction chamber and the second-stage reaction chamber are isolated from each other in the initial stage. The cyanide-containing wastewater is first in the first-stage reaction chamber, and one of the pH value adjustment mechanisms 2 is operated to adjust the cyanide-containing wastewater in the first-stage reaction chamber to a suitable pH value. At this time, the first cylinder 21 is operated first, and the first cylinder 21 performs reciprocating telescopic motion, so that the first piston plate 23 slides in the first piston cylinder 22. The first piston cylinder 22 extracts an alkaline solution through the first pipe 221, and then discharges the alkaline solution into the first-stage reaction chamber through the second pipe 222, so that the pH value of the cyanide-containing wastewater increases. The first pipe 221 and the second pipe 222 are both provided with a one-way valve to prevent backflow, and a pH value detection probe is provided in the first-stage reaction chamber. After the pH value detection probe detects that the pH value is adjusted to the required range, the first cylinder 21 stops running;

[0045] When the first cylinder 21 is extended, the cylinder rod of the first cylinder 21 drives the second piston plate 25 to move upward synchronously, so that the second piston cylinder 24 discharges air to the passive cylinder 26 through the exhaust pipe 242, so that the passive cylinder 26 can be shortened. When the second piston plate 25 moves downward, air is extracted through the exhaust pipe 241 to prepare for the next discharge. When the passive cylinder 26 is shortened, the metering plate 261 descends. At this time, there is a gap between the metering plate 261 and the driving plate 281. During production, by The inner diameter of the metering cylinder 27 is adjusted so that the space formed by the gap can just hold the amount of alkaline solution discharged from the second pipe 222 at one time when the first piston plate 23 moves upward. After each upward movement of the first piston plate 23, the metering plate 261 will move down by the same amount, that is, when the first piston plate 23 moves down once, the space between the driving plate 281 and the metering plate 261 is one times the volume of the first piston cylinder 22, and when it moves down twice, it is twice the volume, and so on, so that the amount of alkaline solution added can be measured;

[0046] Furthermore, when the metering plate 261 moves downward, the alkaline solution simultaneously enters the space between the driving plate 281 and the metering plate 261 through the extraction tube 262, completing the material collection of the alkaline solution. After the first-stage reaction is completed, the cyanide-containing wastewater is discharged into the second-stage reaction chamber. Subsequently, when the cyanide-containing wastewater of the same specification and volume is injected into the first-stage reaction chamber, it is only necessary to control the expansion and contraction of the second cylinder 28 to discharge the alkaline solution stored in the metering cylinder 27 into the first-stage reaction chamber, so that the cyanide-containing wastewater can be adjusted to the required pH value.

[0047] The working principles of the two pH value adjustment mechanisms 2 are the same, except that the second pipeline 222 and the discharge pipe 263 of one are connected to the first-stage reaction chamber and are used to add alkaline solution, while the second pipeline 222 and the discharge pipe 263 of the other are connected to the second-stage reaction chamber and are used to add acidic solution;

[0048] In addition, a heating wire can be arranged inside the first-stage reaction chamber according to the use requirements, so that the cyanide-containing wastewater can be heated to increase the reaction speed;

[0049] If the specification of the wastewater is changed, the first cylinder 21 is restarted to adjust and measure the pH value of the cyanide-containing wastewater again;

[0050] The passive cylinder 26 is also provided with an air release valve so that the length of the passive cylinder 26 can be reset.

[0051] Regarding the structure of the processing container 1, specifically:

[0052] The processing container 1 further includes a rotating shaft 15 , to which a stirring rod 16 is connected. The stirring rod 16 rotates in the processing tank 11 .

[0053] A driving rod 17 is slidably connected inside the rotating shaft 15, and a control board 13 is connected to the top of the driving rod 17. The control board 13 is located at the lower part of the isolation plate 12; a protrusion 14 is provided on the lower surface of the isolation plate 12 and the upper surface of the control board 13, and a socket that cooperates with the protrusion 14 is respectively provided on the isolation plate 12 and the control board 13. When the driving rod 17 slides down, the control board 13 moves down, so that the protrusion 14 of the isolation plate 12 is pulled out of the socket on the control board 13, and the protrusion 14 of the control board 13 is pulled out of the socket on the isolation plate 12, so that the cyanide-containing wastewater is transferred from the first-stage reaction chamber to the second-stage reaction chamber.

[0054] The rotating shaft 15 is driven to rotate by an external motor. After the reaction starts, the rotating shaft 15 is controlled to be in a rotating state, so that the stirring rod 16 stirs the cyanide-containing wastewater, so that the pH value adjusting agent and the cyanide-breaking agent can be evenly mixed with the cyanide-containing wastewater. The driving rod 17 can be driven by a driving device such as an electric cylinder or a hydraulic rod, but the driving rod 17 must be rotatably connected to the driving device to ensure that there is no interference with the rotation of the rotating shaft 15. When the first-stage reaction is carried out, the driving rod 17 is in an upward state. At this time, the isolation plate 12 and the control plate 13 are fitted, and all the protrusions 14 are inserted into the corresponding jacks, so that the first-stage reaction chamber and the second-stage reaction chamber are isolated from each other, and the cyanide-containing wastewater At this time, it will not flow into the second-stage reaction chamber. After the first-stage reaction is completed, the control driving rod 17 is moved downward. At this time, the socket is opened, so that the cyanide-containing wastewater after the first-stage reaction can flow into the second-stage reaction chamber through the socket, thereby carrying out the reaction in the second stage. At this time, the driving rod 17 can be controlled to move upward as needed, so that the two reaction chambers are isolated from each other again, so that the first-stage reaction chamber can continue to be used. When both reaction chambers are in use, it is necessary to discharge the cyanide-containing wastewater in the second-stage reaction chamber after the second-stage reaction is completed, and then control the two reaction chambers to be connected (a pipe for discharging treated wastewater is provided at the lower part of the treatment tank 11, which is not shown in the figure).

[0055] Regarding how to control the amount of bleaching powder in the two reaction stages, specifically:

[0056] It also includes an adding mechanism 3, which includes a first material taking barrel 32, which is connected to the first-stage reaction chamber through a first feeding pipe 35; a pushing plate 33 and a pressing plate 36 are slidably connected in the first material taking barrel 32, and bleaching powder is filled between the pushing plate 33 and the pressing plate 36. After the pressing plate 36 moves up to the upper part of the first feeding pipe 35, the pushing plate 33 moves up, so that the pushing plate 33 pushes the bleaching powder to the first feeding pipe 35, so that the bleaching powder enters the first-stage reaction chamber through the first feeding pipe 35. After the first-stage reaction is completed, the pushing plate 33 stops moving up and the upward movement stroke of the pushing plate 33 is recorded.

[0057] The outside of the processing tank 11 is connected to a third cylinder 31, the output end of the third cylinder 31 is connected to a push plate 33, the first feeding pipe 34 is connected to the first material barrel 32, the first feeding pipe 34 is connected to the bleaching powder supply point, the first feeding pipe 34 is provided with a first switch valve 341, the connection port of the first feeding pipe 34 and the first material barrel 32 is located below the connection port of the first feeding pipe 35 and the first material barrel 32; when the third cylinder 31 contracts to make the push plate 33 move downward, the first switch valve 341 opens to allow the bleaching powder to enter the first material barrel 32, and when the third cylinder 31 extends to make the push plate 33 move upward, the first switch valve 341 is closed to allow the bleaching powder to be discharged from the first material barrel 32 through the first feeding pipe 35.

[0058] The adding mechanism 3 also includes a second material taking barrel 37, which is connected to the second stage reaction chamber through a second feeding pipe 371; a vertical plate 38 is slidably connected to the side wall of the second material taking barrel 37, and a second feeding pipe 381 and a limiting plate 383 are connected to the vertical plate 38, and the limiting plate 383 is located at the upper part of the opening where the second feeding pipe 381 and the vertical plate 38 are connected. When the pushing plate 33 moves up, the vertical plate 38 moves up synchronously, so that the space below the limiting plate 383 in the second material taking barrel 37 can accommodate the second material taking barrel 37 and the second material feeding pipe 381. An equal amount of bleaching powder is discharged from the material barrel 32; a second switch valve 382 is provided in the second feeding pipe 381, and a third switch valve 372 is provided in the second feeding pipe 371. When the limit plate 383 moves up, the third switch valve 372 is closed and the second switch valve 382 is opened; and after the limit plate 383 is stationary, when the driving rod 17 moves down, the third switch valve 372 is opened and the second switch valve 382 is closed; when the driving rod 17 moves up, the third switch valve 372 is closed and the second switch valve 382 is opened.

[0059] The cylinder rod of the third cylinder 31 is connected to the first connecting rod 311, the second feeding tube 381 is connected to the second connecting rod 312, and an electromagnet 313 is connected between the first connecting rod 311 and the second connecting rod 312. After the upward movement stroke of the push plate 33 is recorded, the electromagnet 313 is powered off to allow the second feeding tube 381 to maintain its position.

[0060] The first feeding pipe 34 and the second feeding pipe 381 are both connected to the bleaching powder supply;

[0061] Generally, the oxidant required for the primary oxidation and the secondary oxidation should be added in stages, and the addition ratio is usually 1:1. In this embodiment, bleaching powder is used as the oxidant to carry out a two-stage reaction, that is, after the amount of bleaching powder used in the first stage is determined, the amount of bleaching powder used in the second stage and subsequent treatment of cyanide-containing wastewater of the same specification and volume is also determined;

[0062] After the pH value of the cyanide-containing wastewater is adjusted, when the cyanide-containing wastewater is first broken, the ORP detection equipment is used to detect the alkalinity of the cyanide-containing wastewater. At the same time, the first switch valve 341 is closed, and the pressing plate 36 is controlled to move up (it should be noted that the pressing plate 36 can be directly placed in the first material taking barrel 32, and then manually taken out, or it can be driven to move vertically by external power). At this time, the third cylinder 31 is started to move the push plate 33 up, so that the push plate 33 pushes the bleaching powder up, so that the bleaching powder moves up to the first feed pipe 35 and then is discharged into the treatment tank 11 through the first feed pipe 35. At this time, with the rotation of the stirring rod 16, the bleaching powder performs a first-stage oxidation on the cyanide-containing wastewater, and when the ORP detection equipment detects that the ORP When the value reaches a specific value, such as 300mV (it can also be other values, and the specific value is customized according to actual needs), it usually means that CN- has been basically converted into CNO-. At this time, it means that the reaction is basically completed. The control system controls the third cylinder 31 to stop extending, and records the extension length of the third cylinder 31, so that when the cyanide-containing wastewater of the same specification and volume is subsequently treated, the third cylinder 31 is extended to the length recorded before, ensuring that the discharge amount of bleaching powder is basically in an equal state. In addition, before each discharge of bleaching powder, the third cylinder 31 needs to be shortened so that the push plate 33 moves downward. When the push plate 33 moves downward, the pressure plate 36 is reset, and the first switch valve 341 is opened at the same time, so that the bleaching powder in the first material taking barrel 32 is replenished;

[0063] When the third cylinder 31 moves downward, the electromagnet 313 is in an energized state, so that the first connecting rod 311 and the second connecting rod 312 move upward synchronously, and the inner diameters of the two material barrels are equal. That is to say, when bleaching powder is first added to the first-stage reaction chamber, the push plate 33 and the vertical plate 38 move upward synchronously. At this time, the vertical plate 38 drives the limit plate 383 to move upward synchronously, that is, at this time, the discharge amount of bleaching powder is equal to the space capacity between the limit plate 383 and the bottom wall of the second material barrel 37 after the limit plate 383 moves upward. In this process, the third switch valve 372 is closed and the second switch valve 382 is opened, so that at this time, the bleaching powder can enter the second material barrel 37 through the second feeding pipe 381, so that the second material barrel 37 takes out an amount of bleaching powder equal to that discharged from the first material barrel 32;

[0064] When the extension distance of the third cylinder 31 is recorded, it means that the amount of bleaching powder is determined. At this time, the electromagnet 313 is powered off, and the relative position of the vertical plate 38 and the second material taking barrel 37 does not change due to the friction force. Subsequently, the third cylinder 31 is extended and retracted by the recorded length, so that the cyanide-containing wastewater of the same specification and volume is added with a corresponding amount of bleaching powder during the first-stage reaction. During the second-stage reaction, the downward movement of the driving rod 17 is the trigger point. When the driving rod 17 moves downward, the cyanide-containing wastewater enters the second-stage reaction chamber. At this time, the pH value of the cyanide-containing wastewater is first adjusted to reduce it to the required range. After the pH value is detected to meet the standard, the second switch valve 382 is first closed, and the third switch valve 372 is opened again, so that the bleaching powder in the second material taking barrel 37 is discharged into the second-stage reaction chamber, and the second-stage reaction of cyanide-containing wastewater treatment is carried out;

[0065] When the cyanide-containing wastewater of the same specification and volume is subjected to two-stage treatment, the third switch valve 372 is first closed and the second switch valve 382 is opened, so that the bleaching powder is quantitatively taken out of the second material taking barrel 37, and then the second switch valve 382 is first closed and the third switch valve 372 is opened, so that the bleaching powder in the second material taking barrel 37 is discharged into the second-stage reaction chamber, and this reciprocating cycle is performed. Therefore, when a large amount of cyanide-containing wastewater is treated in batches with the same volume and specification, the pH value of the two reaction stages can be quickly adjusted, and at the same time, the required amount of bleaching powder can be quickly and preparedly taken out and added, thereby improving the treatment efficiency of the cyanide-containing wastewater.

[0066] It should also be noted that the device is not limited to batch treatment of large amounts of cyanide-containing wastewater, but can also treat cyanide-containing wastewater produced under the same reaction conditions. It is also more convenient for treating cyanide-containing wastewater produced by standardized assembly line production in factories.

[0067] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cyanide-containing wastewater treatment device, comprising a treatment container (1), characterized in that: The processing container (1) comprises a processing tank (11), the middle part of the processing tank (11) is connected to an isolation plate (12), the upper part of the isolation plate (12) is a first-stage reaction chamber, and the lower part is a second-stage reaction chamber, and the outer wall of the processing tank (11) is connected to two pH value adjustment mechanisms (2), and the two pH value adjustment mechanisms (2) are respectively connected to the first-stage reaction chamber and the second-stage reaction chamber; The pH value adjustment mechanism (2) comprises a first piston cylinder (22) and a second piston cylinder (24), wherein a first piston plate (23) and a second piston plate (25) are slidably connected in the first piston cylinder (22) and the second piston cylinder (24), respectively, and the first piston plate (23) and the second piston plate (25) slide synchronously, and the outer wall of the processing tank (11) is connected to a metering cylinder (27), and a driving plate (281) and a metering plate (261) are slidably connected in the metering cylinder (27), and when the first piston plate (23) slides, the adjusting agent is transported into the processing tank (11), and when the second piston plate (25) slides, the metering plate (261) is driven to move downward, so that the volume between the metering plate (261) and the driving plate (281) is equal to the transport amount of the adjusting agent; The pH value adjustment mechanism (2) further comprises a first cylinder (21), wherein the first piston plate (23) and the second piston plate (25) are commonly connected to a cylinder rod of the first cylinder (21); The outer wall of the processing tank (11) is connected to a passive cylinder (26), and an exhaust pipe (242) is connected between the passive cylinder (26) and the second piston cylinder (24). After the first piston plate (23) slides up and down once, the second piston plate (25) slides synchronously, so that the second piston cylinder (24) extracts the medium in the passive cylinder (26), so that the metering plate (261) moves downward, so that the volume between the driving plate (281) and the metering plate (261) is equal to the volume of the regulating reagent; The metering plate (261) is connected to an extraction pipe (262) and a discharge pipe (263), both the extraction pipe (262) and the discharge pipe (263) are provided with a one-way valve, and the extraction pipe (262) is connected to a regulating reagent supply location, and the discharge pipe (263) is connected to the processing tank (11); The processing tank (11) is connected to a second cylinder (28), and an output end of the second cylinder (28) is connected to the driving plate (281); After the pH value in the treatment tank (11) is adjusted, the volume between the metering plate (261) and the driving plate (281) is equal to the volume of the regulating reagent pumped out by the first piston cylinder (22); After the cyanide-containing wastewater of the same specification is injected into the treatment tank (11) again, the first cylinder (21) stops running, and the second cylinder (28) expands and contracts once, so that the metering cylinder (27) extracts a sufficient amount of regulating reagent and injects the regulating reagent into the treatment tank (11).

2. The cyanide-containing wastewater treatment device according to claim 1, characterized in that: The processing container (1) further comprises a rotating shaft (15), the rotating shaft (15) being connected to a stirring rod (16), the stirring rod (16) rotating in the processing tank (11).

3. The cyanide-containing wastewater treatment device according to claim 2, characterized in that: A driving rod (17) is slidably connected inside the rotating shaft (15), a control plate (13) is connected to the top of the driving rod (17), and the control plate (13) is located below the isolation plate (12); The lower surface of the isolation plate (12) and the upper surface of the control plate (13) are both provided with a protrusion (14), and the isolation plate (12) and the control plate (13) are respectively provided with a socket that cooperates with the protrusion (14). When the driving rod (17) slides down, the control plate (13) moves down, so that the protrusion (14) of the isolation plate (12) is pulled out of the socket on the control plate (13), and the protrusion (14) of the control plate (13) is pulled out of the socket on the isolation plate (12), so that the cyanide-containing wastewater is transferred from the first-stage reaction chamber to the second-stage reaction chamber.

4. The cyanide-containing wastewater treatment device according to claim 3, characterized in that: It also includes an adding mechanism (3), the adding mechanism (3) including a first material taking barrel (32), the first material taking barrel (32) being connected to the first-stage reaction chamber via a first feeding pipe (35); A push plate (33) and a pressure plate (36) are slidably connected in the first material taking barrel (32), and bleaching powder is filled between the push plate (33) and the pressure plate (36). After the pressure plate (36) moves up to the upper part of the first feeding pipe (35), the push plate (33) moves up, so that the push plate (33) pushes the bleaching powder to the first feeding pipe (35), so that the bleaching powder enters the first-stage reaction chamber through the first feeding pipe (35). After the first-stage reaction is completed, the push plate (33) stops moving up and the upward movement stroke of the push plate (33) is recorded.

5. The cyanide-containing wastewater treatment device according to claim 4, characterized in that: The outside of the processing tank (11) is connected to a third cylinder (31), the output end of the third cylinder (31) is connected to the push plate (33), the first feeding pipe (34) is connected to the first material taking barrel (32), the first feeding pipe (34) is connected to the bleaching powder supply point, the first feeding pipe (34) is provided with a first switch valve (341), and the connection port between the first feeding pipe (34) and the first material taking barrel (32) is located below the connection port between the first feeding pipe (35) and the first material taking barrel (32); When the third cylinder (31) contracts to cause the push plate (33) to move downward, the first switch valve (341) opens to allow the bleaching powder to enter the first material taking barrel (32); and when the third cylinder (31) extends to cause the push plate (33) to move upward, the first switch valve (341) closes to allow the bleaching powder to be discharged from the first material taking barrel (32) through the first feeding pipe (35).

6. The cyanide-containing wastewater treatment device according to claim 5, characterized in that: The adding mechanism (3) further comprises a second material taking barrel (37), wherein the second material taking barrel (37) is connected to the second-stage reaction chamber via a second material feeding pipe (371); A vertical plate (38) is slidably connected to the side wall of the second material taking barrel (37), and a second feeding pipe (381) and a limiting plate (383) are connected to the vertical plate (38), and the limiting plate (383) is located above the opening where the second feeding pipe (381) and the vertical plate (38) are connected. When the pushing plate (33) moves upward, the vertical plate (38) moves upward synchronously, so that the space below the limiting plate (383) in the second material taking barrel (37) can accommodate bleaching powder of the same amount as that discharged from the first material taking barrel (32); A second switch valve (382) is arranged in the second feeding pipe (381), and a third switch valve (372) is arranged in the second feeding pipe (371); when the limit plate (383) moves upward, the third switch valve (372) is closed and the second switch valve (382) is opened; and after the limit plate (383) is stationary, when the driving rod (17) moves downward, the third switch valve (372) is opened and the second switch valve (382) is closed; when the driving rod (17) moves upward, the third switch valve (372) is closed and the second switch valve (382) is opened.

7. The cyanide-containing wastewater treatment device according to claim 6, characterized in that: The cylinder rod of the third cylinder (31) is connected to a first connecting rod (311), the second feeding tube (381) is connected to a second connecting rod (312), an electromagnet (313) is connected between the first connecting rod (311) and the second connecting rod (312), and after the upward movement stroke of the push plate (33) is recorded, the electromagnet (313) is powered off so that the second feeding tube (381) maintains its position.

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