A device for disposing of chemical nickel waste liquid

Abstract

This invention relates to the field of waste liquid treatment technology, specifically to a chemical nickel waste liquid treatment device, comprising: a treatment tank, and a fixed plate fixed on the treatment tank, with a pumping cylinder fixed on the fixed plate; a stirring assembly disposed on the fixed plate, with symmetrically arranged stirring blades connected to the stirring assembly; a centrifugal control mechanism disposed on the stirring assembly, with two symmetrically arranged counterweight plates connected to the centrifugal control mechanism; and a trigger transmission mechanism disposed on the stirring assembly and connected to the counterweight plates. The pumping cylinder is equipped with a pulse jet assembly. When the conveying power of the stirring assembly changes, the flow-facing area of ​​the stirring blades is adjusted accordingly under the action of the centrifugal control mechanism. This ensures that when the stirring blades rotate at high speed, they are in a low flow-facing state to guarantee the uniformity of mixing between the reagent and the waste liquid, and when rotating at low speed, they are in a high flow-facing state to ensure the normal progress of flocculation and sedimentation.

Description

Technical Field

[0001] This invention relates to the field of waste liquid treatment technology, specifically a device for treating chemical nickel waste liquid. Background Technology

[0002] Electroless nickel plating, also known as electroless nickel plating, is a technique that deposits nickel-phosphorus or nickel-boron alloys on the surface of a catalytically active substrate using a chemical reducing agent in solution.

[0003] However, the electroless nickel plating process generates a large amount of complex and difficult-to-treat waste liquid. This type of waste liquid not only contains high concentrations of nickel ions (which belong to the first category of heavy metal pollutants, are highly toxic and easily accumulate in organisms), but also contains high concentrations of complexing agents, reducing agents such as sodium hypophosphite, stabilizers, and a large amount of organic matter, giving it the characteristics of high chemical oxygen demand, high ammonia nitrogen, and stable heavy metal complexation.

[0004] Currently, the treatment of chemical nickel waste liquid typically employs a multi-stage process of "complex breaking-precipitation-solid-liquid separation". First, a strong oxidant and catalyst are added to the waste liquid to break the stable combination of the complexing agent and nickel ions through an advanced oxidation process, converting the complexed nickel into free nickel ions. Then, the pH of the waste liquid is adjusted to alkaline, and a precipitant is added to form nickel hydroxide precipitate from the free nickel ions. A flocculant is also added to promote the aggregation and sedimentation of fine precipitates. Finally, mud-water separation is achieved through sedimentation, filtration, or centrifugation.

[0005] Throughout the treatment process, stirring is required to ensure thorough mixing of the reagents and waste liquid. The required stirring intensity varies at different reaction stages. However, in the prior art, when the complex-breaking reaction is completed and the process transitions to the flocculation and sedimentation stage, the stirring speed needs to be reduced to avoid breaking the flocs. However, the reduction in stirring speed will cause the flocculation and sedimentation reaction to be in a dead zone. Furthermore, the prior art usually uses a metering pump to continuously add reagents, and the reduced stirring intensity cannot quickly disperse the reagents, which can easily cause the reagents to accumulate locally in the viscous flocculation system, resulting in uneven mixing. Summary of the Invention

[0006] The purpose of this invention is to provide a chemical nickel waste liquid treatment device to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A device for treating chemical nickel waste liquid includes: A treatment tank, and a fixing plate fixed on the treatment tank, with a pumping cylinder fixed on the fixing plate; Also includes: A stirring assembly is mounted on the fixed plate, and symmetrically arranged stirring blades are connected to the stirring assembly. A centrifugal control mechanism is provided on the stirring assembly. Two counterweight plates are connected to the centrifugal control mechanism in a symmetrical arrangement. The centrifugal control mechanism can adjust the distance between the two counterweight plates when the stirring assembly moves, and adjust the frontal area of ​​the stirring blades through the stirring assembly. A trigger transmission mechanism is provided on the stirring assembly and connected to the counterweight plate. A pulse jet assembly is provided inside the pumping cylinder. The trigger transmission mechanism can operate when the counterweight plate moves and intermittently spray the liquid medicine in the pumping cylinder into the treatment tank through the pulse jet assembly.

[0008] As a further aspect of the present invention: the stirring assembly includes a motor fixed to the top of the fixed plate, a transmission rod rotatably mounted on the fixed plate and connected to the output shaft of the motor, a fixed sleeve fixed on the transmission rod, and symmetrically arranged rotating rods rotatably mounted on the side wall of the fixed sleeve, the rotating rods being fixedly connected to the stirring blade.

[0009] As a further embodiment of the present invention: the centrifugal control mechanism includes a receiving plate fixed on the transmission rod, the receiving plate having symmetrically arranged sliding grooves, a sliding block being slidably installed in the sliding groove, and the sliding block being fixedly connected to the counterweight plate; It also includes an elastic component and a guide component disposed on the receiving plate and connected to the rotating rod.

[0010] As a further embodiment of the present invention: the elastic component includes a guide post fixed on the support plate, the guide post passing through the counterweight plate, and a first spring sleeved on the guide post, the two ends of the first spring abutting against the counterweight plate and the support plate respectively.

[0011] As a further embodiment of the present invention: the guiding component includes a spiral groove formed on the outer circumference of the rotating rod, a sliding sleeve is axially slidable on the rotating rod, a limiting block is fixed on the inner wall of the sliding sleeve and slidably engaged with the spiral groove, and a support rod is fixed on the outer wall of the sliding sleeve and fixedly connected to the sliding block.

[0012] As a further embodiment of the present invention: the trigger transmission mechanism includes a movable sleeve that slides along the axial direction of the transmission rod, the end of the movable sleeve is fixed with a transmission tooth, and the outer circumferential wall of the movable sleeve is hinged with connecting rods that are symmetrically arranged and hinged to the counterweight plate. It also includes a driven assembly and a pushing assembly disposed on the transmission rod and connected to the transmission gear.

[0013] As a further embodiment of the present invention: the driven component includes a rotating sleeve rotatably mounted on the pumping cylinder and sleeved on the transmission rod, and the end of the rotating sleeve is fixed with a follower tooth that cooperates with the transmission tooth.

[0014] As a further embodiment of the present invention: the jacking assembly includes a rotating disk fixed on the rotating sleeve, and the rotating disk is fixed with symmetrically arranged arc-shaped protrusions.

[0015] As a further embodiment of the present invention: the pulse jet mechanism includes a keyway formed on the inner circumference of the pumping cylinder, a piston disc that is slidably sealed and connected to the pumping cylinder and slidably fitted with the keyway, the piston disc being slidably connected to the transmission rod, a limiting wheel that is rotatably mounted on the piston disc and abuts against the arc-shaped protrusion and the rotating disk, and a second spring being sleeved on the transmission rod, the two ends of the second spring abutting against the piston disc and the inner wall of the pumping cylinder respectively.

[0016] As a further embodiment of the present invention: the pulse jet mechanism further includes a plurality of jet pipes and feed pipes fixed to the outer circumference of the pumping cylinder and distributed equidistantly in a circular pattern, wherein the jet pipes and the feed pipes are connected to the pumping cylinder.

[0017] Compared with the prior art, the beneficial effects of the present invention are: the present invention can control the stirring blade to perform corresponding stirring treatment at different reaction stages. In the high-speed complex breaking stage, the centrifugal force generated by the counterweight plate automatically overcomes the spring force, causing the stirring blade to deflect at an angle and adjust it to a small frontal area. Through high-speed stirring with a small frontal area, a flow field dominated by high shear rate and violent turbulence can be generated in the waste liquid, which greatly enhances the mass transfer process, thereby significantly shortening the complex breaking time and improving the thoroughness of complex breaking.

[0018] When the process switches to the low-speed flocculation stage, the centrifugal force decreases, allowing the stirring blades to return to a large frontal area. Through low-speed, large frontal stirring, a large volumetric pumping flow and laminar shear can be generated in the waste liquid, achieving a complete circulation and propulsion of the entire high-viscosity, non-Newtonian flocculation system without dead zones. This not only keeps the precipitate in uniform suspension and promotes the coagulation of flocs, but also effectively avoids floc breakage caused by excessive shear force, creating an ideal hydrodynamic environment for the formation of dense, easily settling flocs.

[0019] By coordinating the centrifugal control mechanism and the trigger transmission mechanism, the action of the pulse jet mechanism can be controlled. Only during the low-speed flocculation stage, when the counterweight plate is reset, the connecting rod pushes the transmission teeth and follower teeth to mesh, thereby starting the jet delivery of the agent and forming a pulsed high-speed jet. The pulsed high-speed jet can penetrate the high-viscosity, non-Newtonian flocculent waste liquid, thus more effectively delivering the agent directly to the interior of the fluid, rather than just staying on the surface. At the same time, the intermittent delivery method can give flocculation and sedimentation sufficient reaction time. The newly added agent can have a certain amount of time to contact the existing flocs and play a role before the next pulse arrives, which helps to form a denser and more uniform flocculent. This avoids the incomplete reaction or floc breakage that may be caused by the instantaneous local concentration of excessive agent, thus optimizing the overall flocculation and sedimentation efficiency and effect. Attached Figure Description

[0020] Figure 1 A schematic diagram of one embodiment of a chemical nickel waste liquid treatment device; Figure 2 This is a schematic diagram of the structure from another angle in one embodiment of the chemical nickel waste liquid treatment device; Figure 3 This is a schematic diagram showing the connection relationship between some stirring components, some centrifugal control mechanisms, some trigger transmission mechanisms, some pulse jet mechanisms, and pumping cylinders in one embodiment of a chemical nickel waste liquid treatment device. Figure 4 for Figure 3 Another structural diagram from another angle; Figure 5 for Figure 4 Enlarged structural diagram at point A; Figure 6 This is a schematic diagram of the structure of a portion of the pulse jet mechanism, a portion of the stirring assembly, a portion of the centrifugal control mechanism, and a trigger transmission mechanism in one embodiment of a chemical nickel waste liquid treatment device; Figure 7 This is a schematic diagram of the structure of a portion of the stirring assembly and a portion of the centrifugal control mechanism in one embodiment of a chemical nickel waste liquid treatment device; Figure 8 This is an exploded structural diagram of part of the stirring assembly and part of the centrifugal control mechanism in one embodiment of a chemical nickel waste liquid treatment device; Figure 9 An exploded structural diagram of part of the centrifugal control mechanism in one embodiment of a chemical nickel waste liquid treatment device; Figure 10 A schematic cross-sectional view of the pump cylinder in one embodiment of a chemical nickel waste liquid treatment device; Figure 11 This is an exploded structural diagram of part of the trigger transmission mechanism and part of the pulse jet mechanism in one embodiment of the chemical nickel waste liquid treatment device.

[0021] In the diagram: 1. Treatment tank; 2. Fixed plate; 3. Motor; 4. Transmission rod; 5. Fixed sleeve; 6. Rotating rod; 601. Spiral groove; 7. Sliding sleeve; 701. Limiting block; 8. Stirring blade; 9. Support rod; 10. Receiving plate; 1001. Slide groove; 11. Sliding block; 12. Counterweight plate; 13. Guide column; 14. First spring; 15. Connecting rod; 16. Movable sleeve; 17. Transmission gear; 18. Rotating sleeve; 19. Follower gear; 20. Rotating disk; 2001. Arc-shaped protrusion; 21. Pumping cylinder; 2101. Keyway; 22. Piston disk; 23. Second spring; 24. Limiting wheel; 25. Spray pipe; 26. Feed pipe. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0024] Please see Figures 1-11 In this embodiment of the invention, a chemical nickel waste liquid treatment device includes: Treatment tank 1, and fixing plate 2 fixed on treatment tank 1, with pumping cylinder 21 fixed on fixing plate 2; Also includes: A stirring assembly is mounted on the fixed plate 2, and stirring blades 8 are connected to the stirring assembly in a symmetrical arrangement. A centrifugal control mechanism is provided on the stirring assembly. Two counterweight plates 12 are connected to the centrifugal control mechanism in a symmetrical arrangement. The centrifugal control mechanism can adjust the distance between the two counterweight plates 12 when the stirring assembly moves, and adjust the frontal area of ​​the stirring blade 8 through the stirring assembly. A trigger transmission mechanism is installed on the stirring assembly and connected to the counterweight plate 12. A pulse jet assembly is installed inside the pumping cylinder 21. The trigger transmission mechanism can operate when the counterweight plate 12 moves, and intermittently spray the liquid medicine in the pumping cylinder 21 into the treatment tank 1 through the pulse jet assembly.

[0025] Specifically, the treatment of nickel-containing wastewater typically involves multiple stages. In the first stage, oxidants and catalysts are added to the wastewater to break down the complexes with the nickel. During this process, strong mixing is required to create turbulent flow, shortening the reaction time and accelerating the reaction rate. In the second stage, an alkaline solution is added to the wastewater for neutralization and precipitation. During neutralization, flocculation occurs, requiring weak mixing to ensure the flocculant is evenly dispersed without breaking down the flocs due to excessive stirring. Therefore, when adding oxidants and catalysts, the wastewater is in a low-viscosity, Newtonian fluid state. The stirring assembly controls the rapid rotation of the stirring blades 8, and simultaneously drives the centrifugal force... The movement of the control mechanism minimizes the frontal area of ​​the stirring blade 8 in this state. Under the action of high rotation speed and small frontal area, high-intensity turbulence and shearing are generated, resulting in the highest mixing efficiency and accelerating the reaction rate. After the reaction is completed, an alkaline solution and flocculant need to be added to the waste liquid. At this time, the waste liquid transforms into a high-viscosity, non-Newtonian fluid state. In order to maintain solid suspension, promote floc growth, and provide a uniform reaction environment, the stirring component causes the stirring blade 8 to rotate at a low speed. At the same time, the stirring component also increases the frontal area of ​​the stirring blade 8 through the centrifugal control mechanism. Under the action of low rotation speed and large frontal area, a powerful volumetric pumping flow and gentle laminar shearing are generated, driving the entire high-viscosity fluid to circulate and eliminating sedimentation dead zones. In this way, the treatment effect of nickel-containing wastewater can be optimized while the reaction rate is improved.

[0026] Please see Figures 1-4 The stirring assembly includes a motor 3 fixed to the top of the fixed plate 2. A transmission rod 4 connected to the output shaft of the motor 3 is rotatably mounted on the fixed plate 2. A fixed sleeve 5 is fixed on the transmission rod 4. A rotating rod 6 symmetrically arranged is rotatably mounted on the side wall of the fixed sleeve 5. The rotating rod 6 is fixedly connected to the stirring blade 8.

[0027] Please see Figures 1-9The centrifugal control mechanism includes a receiving plate 10 fixed on the transmission rod 4. The receiving plate 10 has symmetrically arranged sliding grooves 1001. A sliding block 11 is slidably installed in the sliding groove 1001 and is fixedly connected to the counterweight plate 12. It also includes an elastic component and a guiding component disposed on the receiving plate 10 and connected to the rotating rod 6. The elastic component includes a guide post 13 fixed on the receiving plate 10. The guide post 13 passes through the counterweight plate 12. A first spring 14 is sleeved on the guide post 13. The two ends of the first spring 14 abut against the counterweight plate 12 and the receiving plate 10, respectively. The guiding component includes a spiral groove 601 formed on the outer circumference of the rotating rod 6. A sliding sleeve 7 slides axially on the rotating rod 6. A limiting block 701 that slides and engages with the spiral groove 601 is fixed on the inner wall of the sliding sleeve 7. A support rod 9 that is fixedly connected to the sliding block 11 is fixed on the outer wall of the sliding sleeve 7.

[0028] In detail, when the device is not working, the two sliding blocks 11 are located at the end of the stroke on one side of the slide groove 1001, and the distance between the two sliding blocks 11 is the smallest. The sliding blocks 11 will control the distance between the counterweight plate 12 and the side wall of the receiving plate 10 on the same side to be the largest. The extension of the first spring 14 in its natural state is greater than the maximum distance between the counterweight plate 12 and the side wall of the receiving plate 10 on the same side. Therefore, the first spring 14 is in a pre-compressed state and always provides the two counterweight plates 12 with a thrust in the direction of mutual approach. The sliding blocks 11 will control the sliding sleeve 7 to be located at the end of the stroke on the side close to the transmission rod 4 through the support rod 9, so that the limiting block 701 is located at the end of the stroke on the side of the spiral groove 601 close to the transmission rod 4. Under the action of the limiting block 701 and the spiral groove 601, the frontal area of ​​the stirring blade 8 is in the maximum state. When waste liquid needs to be treated, the corresponding reagent can be added to the waste liquid first. At the same time, the motor 3 is started and drives the transmission rod 4 to rotate. Since the waste liquid is in a low viscosity state in this state, the motor 3 controls the transmission rod 4 to be in a high speed state. The rotation of the transmission rod 4 directly drives the fixed sleeve 5 and all the rotating rods 6 fixed on it to revolve at high speed around the axis of the transmission rod 4. When the stirring blade 8 has not yet been subjected to significant fluid resistance and the initial flow-facing area is at its maximum, the motor 3 drives the transmission rod 4 to enter the high speed working condition, so that the stirring blade 8 cuts into the low viscosity waste liquid at a high linear velocity, thereby generating a strong initial impact and disturbance to the waste liquid.

[0029] At the same time, the transmission rod 4 will also drive the receiving plate 10 to rotate at high speed, so that the sliding block 11 and the counterweight plate 12 fixed thereto are subjected to a strong inertial force along the slide groove 1001 in the direction away from the axis of the transmission rod 4 under the action of the centrifugal force generated by the high-speed rotation. This centrifugal force quickly overcomes the initial pre-compression force of the first spring 14 and drives the two sliding blocks 11 to carry the counterweight plate 12 to slide synchronously outward (i.e. away from the rotation center) along the slide groove 1001. The outward movement of the sliding block 11 further compresses the corresponding first spring 14, which increases the elastic potential energy stored inside the first spring 14, and the reverse restoring force generated therefrom also increases nonlinearly with the displacement, providing energy reserves for subsequent state switching; on the other hand, the sliding block 11 pushes the sliding sleeve 7 to slide away from the transmission rod 4 along the axis of the rotating rod 6 through the support rod 9 rigidly connected thereto. The sliding sleeve 7 also drives the limiting block 701 to slide along the trajectory of the spiral groove 601. Under the action of the limiting block 701 and the spiral groove 601, the axial movement of the sliding sleeve 7 is converted into the rotational motion of the rotating rod 6 around its own axis. The rotating rod 6 also controls the stirring blade 8 to deflect at an angle, so that the frontal area of ​​the stirring blade 8 gradually decreases. In this way, the small frontal area combined with the high speed can generate a high local shear rate and violent turbulent kinetic energy in the waste liquid, thereby promoting the mixing of the drug liquid and the waste liquid, accelerating the rate of the oxidation complex breaking reaction, and shortening the time required to reach the complete reaction.

[0030] Please see Figures 1-4 , Figure 6 , Figure 10 , Figure 11 The triggering transmission mechanism includes a movable sleeve 16 that slides axially along the transmission rod 4. A transmission tooth 17 is fixed at the end of the movable sleeve 16. A connecting rod 15, which is symmetrically arranged and hinged to the counterweight plate 12, is hinged to the outer circumference of the movable sleeve 16. The mechanism also includes a driven component and a pushing component that are disposed on the transmission rod 4 and connected to the transmission tooth 17. The driven component includes a rotating sleeve 18 that is rotatably mounted on the pumping cylinder 21 and sleeved on the transmission rod 4. A follower tooth 19 that cooperates with the transmission tooth 17 is fixed at the end of the rotating sleeve 18. The pushing component includes a rotating disk 20 that is fixed on the rotating sleeve 18. A symmetrically arranged arc-shaped protrusion 2001 is fixed on the rotating disk 20.

[0031] Please see Figures 1-4 , Figure 6 , Figure 10 , Figure 11The pulse jet mechanism includes a keyway 2101 formed on the inner circumference of the pumping cylinder 21. A piston disc 22 is slidably and sealed inside the pumping cylinder 21 and slidably fitted with the keyway 2101. The piston disc 22 is slidably connected to the transmission rod 4. A limiting wheel 24 is rotatably mounted on the piston disc 22 and abuts against the arc-shaped protrusion 2001 and the rotating disc 20. A second spring 23 is sleeved on the transmission rod 4. The two ends of the second spring 23 abut against the piston disc 22 and the inner wall of the pumping cylinder 21, respectively. The pulse jet mechanism also includes a plurality of jet pipes 25 and feed pipes 26 fixed on the outer circumference of the pumping cylinder 21 and equidistantly distributed in a circle. The jet pipes 25 and feed pipes 26 are connected to the pumping cylinder 21.

[0032] Furthermore, the feed pipe 26 is connected to the tank containing the flocculant and alkaline solvent. Multiple check valves are installed on the outer circumference of the pump cylinder 21, and these check valves are connected to the corresponding spray pipe 25 and feed pipe 26. Under the action of the check valves, the liquid can only enter the pump cylinder 21 through the feed pipe 26 and be discharged through the spray pipe 25. In the initial state, the device is in a non-working state. Under the action of the first spring 14, the distance between the two counterweight plates 12 is minimized. The counterweight plates 12 will control the movable sleeve 16 to be located at the end of the stroke near the rotating sleeve 18 through the connecting rod 15, so that the transmission gear 17 and the follower gear 19 are in a meshing state. In this state, the limit wheel 24 abuts against the end face of the rotating disk 20, so that the piston disk 22 is located at the end of the stroke near the rotating disk 20, that is, the distance between the piston disk 22 and the top inner wall of the pumping cylinder 21 is the largest. The extension of the second spring 23 in its natural state is greater than the maximum distance between the piston disk 22 and the top inner wall of the pumping cylinder 21. Therefore, the second spring 23 is in a pre-compressed state and always provides the piston disk 22 with a thrust in the direction near the rotating disk 20. When the motor 3 controls the transmission rod 4 to rotate at high speed, under the action of centrifugal force, the two counterweight plates 12 move rapidly in a direction away from each other, thereby controlling the movable sleeve 16 to move away from the rotating sleeve 18 through the connecting rod 15, so that the transmission gear 17 and the follower gear 19 are separated. At this time, the stirring blade 8 stirs and mixes the waste liquid with high speed and low frontal area. After the reaction is completed, flocculation and sedimentation separation treatment is required. At this time, the motor 3 controls the transmission rod 4 to rotate at a low speed, so that the centrifugal force on the counterweight plate 12 is reduced and the elastic potential energy stored in the first spring 14 is released. Its nonlinearly increased restoring force drives the two counterweight plates 12 to overcome the residual centrifugal force and slide and reset along their respective slide grooves 1001 toward the center of rotation (i.e., the direction of mutual approach). The reset movement of the counterweight plate 12 is converted into an axial thrust on the movable sleeve 16 through the hinged connecting rod 15, which pushes the movable sleeve 16 to move along the axis of the transmission rod 4 toward the rotating sleeve 18. As the movable sleeve 16 moves, the transmission teeth 17 fixed on it re-engage with the follower teeth 19 fixed at the end of the rotating sleeve 18.

[0033] The meshing of the transmission gear 17 and the follower gear 19 transmits the power of the low-speed rotating transmission rod 4 to the rotating sleeve 18, causing the rotating sleeve 18 and the rotating disk 20 fixedly connected to it to rotate synchronously at the same low speed as the transmission rod 4. The rotating disk 20 also drives the arc-shaped protrusion 2001 fixed on it to move, so that the arc-shaped protrusion 2001 periodically passes the contact position of the upper limit wheel 24 of the piston disk 22. When the arc-shaped protrusion 2001 rotates to contact the upper limit wheel 24, the arc-shaped protrusion 2001... The inclined or curved surface will generate a thrust along the axial direction of the pumping cylinder 21 on the limiting wheel 24. The direction of the thrust is away from the rotating disk 20. Since the piston disk 22 is engaged with the keyway 2101 on the inner wall of the pumping cylinder 21, its circumferential rotation is restricted, but it can slide axially. Therefore, the thrust forces the piston disk 22 to overcome the preload of the second spring 23 and slide away from the rotating disk 20, while further compressing the second spring 23. The axial sliding of the piston disk 22 reduces the effective pumping cavity of the pumping cylinder 21. In this state, the pumping cavity is not filled with liquid medicine. Therefore, when the limiting wheel 24 separates from the highest point of the arc-shaped protrusion 2001, the axial thrust acting on the limiting wheel 24 disappears. At this time, the elastic potential energy stored in the compressed second spring 23 is released rapidly, pushing the piston disc 22 to slide back towards the rotating disc 20 at a relatively fast speed. Thus, the corresponding medicine is drawn into the pumping cavity through the feed pipe 26. When the arc-shaped protrusion 2001 abuts against the limiting wheel 24 again, it pushes the piston disc 22 to move again, reducing the volume of the pumping cavity. This allows the liquid medicine to be evenly delivered to the entire waste liquid through the spray pipe 25 in a pulse jet manner.

[0034] Preferably, during the flocculation stage, the stirring blade 8 acts on the waste liquid at a low speed and with a large frontal area, thereby ensuring that the waste liquid is fully mixed without affecting the flocs. The pulsed high-speed jet can penetrate the high-viscosity, non-Newtonian flocs in the waste liquid, thus more effectively delivering the agent directly to the fluid interior rather than just staying on the surface. At the same time, the intermittent delivery method provides sufficient reaction time for flocculation and sedimentation. The newly added agent has a certain amount of time to contact the existing flocs and exert its effect before the next pulse arrives, which helps to form a denser and more uniform flocs. This avoids insufficient reaction or floc breakage that may be caused by local concentration of excessive agent at an instant, thus optimizing the overall flocculation and sedimentation efficiency and effect.

[0035] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0036] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A device for treating chemical nickel waste liquid, comprising: A treatment tank, and a fixing plate fixed on the treatment tank, with a pumping cylinder fixed on the fixing plate; Its characteristic is that it further includes: A stirring assembly is mounted on the fixed plate, and symmetrically arranged stirring blades are connected to the stirring assembly. A centrifugal control mechanism is provided on the stirring assembly. Two counterweight plates are connected to the centrifugal control mechanism in a symmetrical arrangement. The centrifugal control mechanism can adjust the distance between the two counterweight plates when the stirring assembly moves, and adjust the frontal area of ​​the stirring blades through the stirring assembly. A trigger transmission mechanism is provided on the stirring assembly and connected to the counterweight plate. A pulse jet assembly is provided inside the pumping cylinder. The trigger transmission mechanism can operate when the counterweight plate moves and intermittently spray the liquid medicine in the pumping cylinder into the treatment tank through the pulse jet assembly.

2. The chemical nickel waste liquid treatment device according to claim 1, characterized in that, The stirring assembly includes a motor fixed to the top of the fixed plate. A transmission rod connected to the output shaft of the motor is rotatably mounted on the fixed plate. A fixed sleeve is fixed on the transmission rod. A symmetrically arranged rotating rod is rotatably mounted on the side wall of the fixed sleeve. The rotating rod is fixedly connected to the stirring blade.

3. The chemical nickel waste liquid treatment device according to claim 2, characterized in that, The centrifugal control mechanism includes a receiving plate fixed on the transmission rod, and symmetrically arranged sliding grooves are formed on the receiving plate. A sliding block is slidably installed in the sliding groove and is fixedly connected to the counterweight plate. The centrifugal control mechanism also includes an elastic component and a guide component disposed on the receiving plate and connected to the rotating rod.

4. The chemical nickel waste liquid treatment device according to claim 3, characterized in that, The elastic component includes a guide post fixed to the support plate, the guide post passing through the counterweight plate, and a first spring sleeved on the guide post, the two ends of the first spring abutting against the counterweight plate and the support plate respectively.

5. The chemical nickel waste liquid treatment device according to claim 4, characterized in that, The guiding assembly includes a spiral groove formed on the outer circumference of the rotating rod, a sliding sleeve that slides axially on the rotating rod, a limiting block that slides and engages with the spiral groove fixed on the inner wall of the sliding sleeve, and a support rod that is fixedly connected to the sliding block fixed on the outer wall of the sliding sleeve.

6. The chemical nickel waste liquid treatment device according to claim 5, characterized in that, The triggering transmission mechanism includes a movable sleeve that slides along the axial direction of the transmission rod. The end of the movable sleeve is fixed with a transmission tooth, and the outer circumferential wall of the movable sleeve is hinged with connecting rods that are symmetrically arranged and hinged to the counterweight plate. The triggering transmission mechanism also includes a driven component and a pushing component disposed on the transmission rod and connected to the transmission gear.

7. The chemical nickel waste liquid treatment device according to claim 6, characterized in that, The driven component includes a rotating sleeve rotatably mounted on the pumping cylinder and sleeved on the transmission rod, and a follower tooth that cooperates with the transmission tooth is fixed at the end of the rotating sleeve.

8. The chemical nickel waste liquid treatment device according to claim 7, characterized in that, The jacking assembly includes a rotating disk fixed on the rotating sleeve, and symmetrically arranged arc-shaped protrusions are fixed on the rotating disk.

9. The chemical nickel waste liquid treatment device according to claim 8, characterized in that, The pulse jet mechanism includes a keyway formed on the inner circumference of the pumping cylinder. A piston disc that slides and is slidably fitted with the keyway is slidably connected inside the pumping cylinder. The piston disc is slidably connected to the transmission rod. A limiting wheel that abuts against the arc-shaped protrusion and the rotating disk is rotatably mounted on the piston disc. A second spring is sleeved on the transmission rod. The two ends of the second spring abut against the piston disc and the inner wall of the pumping cylinder, respectively.

10. The chemical nickel waste liquid treatment device according to claim 9, characterized in that, The pulse jet mechanism also includes a plurality of jet pipes and feed pipes fixed to the outer circumference of the pumping cylinder and distributed equidistantly in a circular pattern, wherein the jet pipes and feed pipes are connected to the pumping cylinder.

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