Acid industrial wastewater treatment equipment and wastewater purifying agent preparation and purification process

Abstract

This invention provides acidic industrial wastewater treatment equipment and a wastewater purification agent preparation and purification process, relating to the field of wastewater treatment technology. The equipment includes a treatment tank, a wetting mechanism, a transmission mechanism, and a dosing mechanism. The wetting mechanism includes a mesh plate disposed inside the treatment tank. Connecting frames are fixed to both sides of the top of the mesh plate, and three guide rods are fixed to the top of each of the two connecting frames. A sealing plate is disposed on the top of the treatment tank, and six guide seats are fixed inside the sealing plate. The six guide rods are slidably connected to the interior of the six guide seats. This solution ultimately achieves the effect of continuously rotating a rotating disc and using the reciprocating motion of the mesh plate to force the floating purification agent into the water, breaking the air film on the surface of the purification agent and helping its internal pores to quickly fill with water. This allows the purification agent to rapidly change from a floating state to a wetted state, fundamentally solving the problem of the purification agent floating and improving the neutralization treatment efficiency of acidic industrial wastewater.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment, and more particularly to acidic industrial wastewater treatment equipment and wastewater purification agent preparation and purification processes. Background Technology

[0002] Acidic industrial wastewater refers to industrial production wastewater with a pH value below 6, containing a large amount of inorganic acids, organic acids, and high concentrations of heavy metal ions. It is widely generated from industries such as mining, metal smelting, electroplating, chemical processing, and pickling. If this type of wastewater is discharged directly into water bodies without effective treatment, it will drastically reduce the pH value of the water, kill aquatic organisms, destroy the self-purification capacity of the water body, and lead to the collapse of the aquatic ecosystem. If it seeps into the soil, it will acidify the soil, damage the soil structure, and pollute groundwater. Moreover, the pollution is long-term and difficult to remediate, so purification treatment is necessary.

[0003] In related technologies, when treating acidic industrial wastewater, wastewater purifying agents are typically added to the wastewater to neutralize it through sufficient contact between the purifying agent and the wastewater. However, some existing acidic industrial wastewater treatment equipment does not facilitate rapid and sufficient contact between the purifying agent and the wastewater. When dry, porous purifying agents are added to water, they tend to float on the surface for extended periods due to the adhesion of surface gas films and reaction bubbles, preventing them from making sufficient contact with the wastewater. This results in low reaction efficiency and an inability to quickly purify the water.

[0004] Therefore, it is necessary to provide acidic industrial wastewater treatment equipment and wastewater purification agent preparation and purification processes to solve the above-mentioned technical problems. Summary of the Invention

[0005] This invention provides acidic industrial wastewater treatment equipment and a wastewater purification agent preparation and purification process, which solves the problem that some existing acidic industrial wastewater treatment equipment is not convenient to quickly and fully contact the purifying agent with the wastewater, resulting in low reaction efficiency.

[0006] To solve the above-mentioned technical problems, the acidic industrial wastewater treatment equipment provided by the present invention includes a treatment tank, a wetting mechanism, a transmission mechanism, and a dosing mechanism;

[0007] The wetting mechanism includes a mesh plate disposed inside the treatment tank. Connecting frames are fixed on both sides of the top of the mesh plate. Three guide rods are fixed on the top of each of the two connecting frames. A sealing plate is disposed on the top of the treatment tank. Six guide seats are fixed inside the sealing plate. The six guide rods are slidably connected to the interior of the six guide seats. Springs are sleeved on the periphery of the six guide rods and at the bottom of the sealing plate.

[0008] The transmission mechanism includes two rotating seats fixed to the top of the sealing plate. The interior of each of the two rotating seats is longitudinally rotatably connected to a rotating rod. Both ends of the two rotating rods are fixed with transmission gears. The two rear guide rods are provided with tooth grooves on opposite sides. The two front transmission gears mesh with the two rear guide rods respectively. The two rear transmission gears are provided with transmission tooth plates on opposite sides. The two transmission tooth plates mesh with the two rear transmission gears respectively.

[0009] The feeding mechanism includes a feeding frame fixed to the back of the treatment tank. Two rotating shafts are rotatably connected inside the feeding frame. A hopper is fixed on one side of the two rotating shafts opposite each other. Driven gears are fixed on the circumferential sides of the two rotating shafts and inside the feeding frame. The two driven gears mesh with two transmission gear plates respectively. The two transmission gear plates are vertically slidably connected inside the feeding frame.

[0010] Preferably, two drive motors are respectively provided on the front and back of the treatment pool, and rotating disks are fixedly provided at the output ends of the four drive motors and inside the treatment pool. The four rotating disks are divided into left and right groups, and a rotating wheel is rotatably connected to the opposite side of each group of rotating disks. The tops of the two groups of rotating wheels are in contact with the bottoms of the two connecting frames respectively.

[0011] Preferably, a screen is provided inside the unloading rack and at the bottom of the hopper, a collection bin is fixed at the bottom of the unloading rack, and a through groove is provided on the back of the inner wall of the processing pool to cooperate with the unloading rack.

[0012] Preferably, the bottom of the collection chamber is fixed with a disturbance mechanism, which includes two vertical plates fixed to the bottom of the collection chamber. The two vertical plates are laterally rotatably connected with a drive rod. The surface of the drive rod is fixed with two first transmission wheels. The two rotating shafts are each fixed with a second transmission wheel at their opposite ends. The two first transmission wheels and the two second transmission wheels are divided into left and right groups, and each group is fitted with a transmission belt.

[0013] Preferably, four reciprocating frames are slidably connected inside the back of the treatment pool. Three baffles are fixed on the front of the four reciprocating frames and inside the treatment pool. Return springs are sleeved on the surface of the four reciprocating frames and on the back of the treatment pool. Contact wheels are rotatably connected inside the four reciprocating frames. Four cams are fixed on the surface of the drive rod, and the four cams respectively contact the four contact wheels.

[0014] Preferably, the inside of the collection chamber is vertically slidably connected to a striking mechanism. The striking mechanism includes a striking bracket vertically slidably connected inside the collection chamber. A striking plate is fixedly provided on the top of the striking bracket. A reciprocating spring is sleeved on the surface of the striking bracket and located at the bottom of the collection chamber. A reciprocating wheel is rotatably connected to the inner side of the bottom of the striking bracket. The striking mechanism is arranged in two sets in a left-right mirror image. The bottom of the two reciprocating wheels respectively contacts the top of the two cams in the middle.

[0015] Preferably, the processing tank is laterally rotatably connected to a mixing mechanism, which includes a mixing shaft laterally rotatably connected to the inside of the processing tank. Multiple mixing paddles are fixed on the circumferential side of the mixing shaft and inside the processing tank. A mounting base is fixed on the left side of the processing tank, and a mixing motor for driving the mixing shaft to rotate is provided on the top of the mounting base.

[0016] Preferably, the left side of the treatment tank is connected to an inlet pipe, the right side of the treatment tank is connected to two drain pipes, and a support frame is fixed at the bottom of the treatment tank.

[0017] Preferably, a water purification tank is provided on the right side of the top of the support frame, a mounting bracket is provided on the top of the water purification tank, and a stirring device is provided on the top of the mounting bracket.

[0018] The wastewater purification agent preparation and purification process includes the following steps:

[0019] Step S1: Weigh the slag from the lithium spodumene impurity removal plate frame, add deionized water to make a pulp, transfer the pulp to a constant temperature water bath and stir and soak in water, filter to obtain filtrate A containing lithium hydroxide and filter residue A mainly containing magnesium hydroxide and a small amount of calcium hydroxide.

[0020] Step S2: Pass filtrate A through an ion exchange resin column to remove a small amount of impurity ions, obtaining a pure lithium hydroxide solution. Then, evaporate and concentrate the solution. When the Li+ concentration in the solution reaches 15-20 g / L, cool and crystallize the solution. Filter the solution to obtain lithium hydroxide crystals. Dry the crystals to obtain the lithium hydroxide product.

[0021] Step S3: After drying the filter residue A, calcine it to convert magnesium hydroxide into porous magnesium oxide and calcium hydroxide into active calcium oxide.

[0022] Step S4: Pre-mill activated carbon and zeolite powder to the required particle size, then mix the ball-milled powder with the calcined product and alkali-resistant inorganic binder in a mixer, and then extrude and granulate the mixture to obtain columnar particles. After drying, a high-performance wastewater purifier is obtained.

[0023] Step S5: Add wastewater purifying agent to acidic industrial wastewater. Initially, a suspension fluidization treatment method is used, and later a sedimentation treatment method is used to achieve the dual functions of water purification and sediment stabilization.

[0024] Compared with related technologies, the acidic industrial wastewater treatment equipment and wastewater purification agent preparation and purification process provided by the present invention have the following beneficial effects:

[0025] By continuously rotating the disc and utilizing the reciprocating motion of the screen, the floating purifying agent is forcibly pressed into the water, breaking the air film on the surface of the purifying agent and helping its internal pores to quickly fill with water. This allows the purifying agent to rapidly change from a floating state to a wetted state, fundamentally solving the problem of purifying agent floating and improving the neutralization treatment efficiency of acidic industrial wastewater. When the screen returns to its original position and the previous batch of purifying agent has been effectively pressed into the water, the hopper will rotate clockwise with the cooperation of the transmission gears, transmission tooth plates, and driven gears, adding a new batch of purifying agent. This avoids excessive accumulation of purifying agent on the water surface and enables intermittent addition of purifying agent. The intermittently added purifying agent will be in the floating, suspended, and settling stages respectively. This stage is a suspended fluidization treatment method, mainly used for rapid neutralization of acidic wastewater and adsorption of free heavy metal ions in the water. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0027] Figure 1 The optimal structural schematic diagram provided for this invention;

[0028] Figure 2 This is a structural schematic diagram of the right view provided by the present invention;

[0029] Figure 3 for Figure 1 The diagram shows a cross-sectional view of the treatment tank.

[0030] Figure 4 A schematic diagram of the transmission mechanism, feeding mechanism and disturbance mechanism provided by the present invention;

[0031] Figure 5 for Figure 4 The diagram shows a structural schematic of the rear view of the dosing mechanism.

[0032] Figure 6 This is a schematic diagram of the wetting mechanism provided by the present invention;

[0033] Figure 7 This invention provides a schematic diagram showing the state in which the rotating disk drives the rotating wheel to rotate, and with the cooperation of the spring, the connecting frame drives the mesh plate to move downward.

[0034] Figure 8 This is a schematic diagram of the transmission mechanism and the feeding mechanism provided by the present invention;

[0035] Figure 9 A schematic diagram showing the state in which the transmission gear plate moves downward and drives the hopper to rotate counterclockwise through the passive gear, as provided by the present invention.

[0036] Figure 10 A schematic diagram of the disturbance mechanism provided by the present invention;

[0037] Figure 11 for Figure 10 The enlarged structural diagram at point A is shown below;

[0038] Figure 12 A schematic diagram showing the state in which the drive rod drives the cam to rotate, causing the spoiler to move forward, as provided by the present invention.

[0039] Figure 13 A schematic diagram of the striking mechanism provided by the present invention;

[0040] Figure 14 A schematic diagram of the structure of the mixing mechanism provided by the present invention;

[0041] Figure 15 This is a schematic diagram of the process flow provided by the present invention.

[0042] Explanation of icon numbers:

[0043] 1. Treatment pool;

[0044] 2. Wetting mechanism; 21. Mesh plate; 22. Connecting frame; 23. Guide rod; 24. Guide seat; 25. Spring; 26. Drive motor; 27. Rotating disk; 28. Rotating wheel;

[0045] 3. Transmission mechanism; 31. Rotating seat; 32. Rotating rod; 33. Transmission gear; 34. Transmission gear plate;

[0046] 4. Feeding mechanism; 41. Unloading rack; 42. Rotating shaft; 43. Material bin; 44. Driven gear;

[0047] 5. Sealing plate; 6. Collection bin;

[0048] 7. Disturbance mechanism; 71. Vertical plate; 72. Drive rod; 73. First transmission wheel; 74. Second transmission wheel; 75. Transmission belt; 76. Reciprocating frame; 77. Spoiler; 78. Return spring; 79. Contact wheel; 710. Cam;

[0049] 8. Striking mechanism; 81. Striking bracket; 82. Striking plate; 83. Reciprocating spring; 84. Reciprocating wheel;

[0050] 9. Mixing mechanism; 91. Mixing shaft; 92. Mixing propeller; 93. Mounting base; 94. Mixing motor;

[0051] 10. Water inlet pipe; 11. Drain pipe; 12. Support frame;

[0052] 13. Water purification tank; 14. Mounting bracket; 15. Mixing equipment. Detailed Implementation

[0053] 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 a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0054] This invention provides an acidic industrial wastewater treatment device.

[0055] First embodiment:

[0056] Please see Figures 1 to 9 Acidic industrial wastewater treatment equipment, including treatment tank 1, wetting mechanism 2, transmission mechanism 3 and dosing mechanism 4;

[0057] The wetting mechanism 2 includes a mesh plate 21 disposed inside the treatment tank 1. Connecting frames 22 are fixed on both sides of the top of the mesh plate 21. Three guide rods 23 are fixed on the top of each of the two connecting frames 22. A sealing plate 5 is disposed on the top of the treatment tank 1. Six guide seats 24 are fixed inside the sealing plate 5. The six guide rods 23 are slidably connected to the interior of the six guide seats 24 respectively. Springs 25 are sleeved on the peripheral side of the six guide rods 23 and at the bottom of the sealing plate 5.

[0058] The transmission mechanism 3 includes two rotating seats 31 fixed to the top of the sealing plate 5. The interior of each of the two rotating seats 31 is longitudinally rotatably connected to a rotating rod 32. Both ends of the two rotating rods 32 are fixed with transmission gears 33. The two rear guide rods 23 are provided with tooth grooves on opposite sides. The two front transmission gears 33 mesh with the two rear guide rods 23 respectively. The two rear transmission gears 33 are provided with transmission tooth plates 34 on the opposite sides. The two transmission tooth plates 34 mesh with the two rear transmission gears 33 respectively.

[0059] The feeding mechanism 4 includes a feeding rack 41 fixed to the back of the treatment tank 1. Two rotating shafts 42 are rotatably connected inside the feeding rack 41. A hopper 43 is fixed on one side of the two rotating shafts 42 opposite to each other. Driven gears 44 are fixed on the circumferential sides of the two rotating shafts 42 and inside the feeding rack 41. The two driven gears 44 mesh with two transmission gear plates 34 respectively. The two transmission gear plates 34 are vertically slidably connected inside the feeding rack 41.

[0060] Two drive motors 26 are respectively provided on the front and back of the treatment pool 1. Rotating disks 27 are fixed at the output ends of the four drive motors 26 and inside the treatment pool 1. The four rotating disks 27 are divided into left and right groups, and a rotating wheel 28 is rotatably connected to the opposite side of each group of rotating disks 27. The tops of the two groups of rotating wheels 28 are in contact with the bottoms of the two connecting frames 22 respectively.

[0061] A screen is provided inside the unloading rack 41 and at the bottom of the hopper 43. A collection bin 6 is fixed at the bottom of the unloading rack 41. A through groove is provided on the back side of the inner wall of the processing pool 1 to cooperate with the unloading rack 41.

[0062] Preferably, the hopper 43 is used to store columnar wastewater purifying agent. The wastewater purifying agent can be recycled and regenerated after use. The recycled wastewater purifying agent will have a certain degree of wear and breakage. The broken wastewater purifying agent can be screened out through the screen in the feed rack 41.

[0063] Preferably, the screen section of the feeding rack 41 is designed to be inclined downwards, so that the columnar wastewater purifying agent can roll into the treatment tank 1, and the collection bin 6 is used to collect the crushed wastewater purifying agent.

[0064] Preferably, the wastewater purifying agent is a dry columnar particle with air-filled internal pores and a dry surface. When it is added to industrial wastewater, the surface tension makes it difficult for water molecules to immediately wet the internal pores of the particles, forming an air film on the particle surface, which temporarily makes the particles hydrophobic. In addition, bubbles may be generated in the industrial wastewater in the early stage of the reaction. The bubbles will adhere to the particle surface and increase the buoyancy of the particles. Thus, in the early stage of the reaction, the wastewater purifying agent floats on the water surface or is suspended in the water. In the later stage of the reaction, the internal pores are filled with water, and as the bubbles are released and burst, the particles will sink.

[0065] Please combine Figure 6 and Figure 7 Multiple drive motors 26 are started. The drive motors 26 rotate and drive the rotating disk 27 and the rotating wheel 28 to rotate. When the rotating wheel 28 rotates to the bottom, under the elastic force of the spring 25, the connecting frame 22 will drive the mesh plate 21 and the guide rod 23 to move downward. By moving the mesh plate 21 downward, the wastewater purification agent floating on the water surface is pressed into the wastewater.

[0066] Furthermore, when the rotating wheel 28 rotates from the bottom to the top, it drives the connecting frame 22 to move upward. The upward movement of the connecting frame 22 drives the mesh plate 21 and the guide rod 23 to move upward, and causes the spring 25 to contract.

[0067] Please combine Figure 8 and Figure 9 When the guide rod 23 moves downward, the two rear guide rods 23 will drive the two front transmission gears 33 to rotate. The two front transmission gears 33 drive the two rear transmission gears 33 to rotate through the rotating rod 32. The rotation of the two rear transmission gears 33 drives the two transmission gear plates 34 to move downward. The downward movement of the two transmission gear plates 34 drives the two driven gears 44 to rotate counterclockwise. The two driven gears 44 drive the hopper 43 to rotate counterclockwise through the rotating shaft 42, thereby canceling the addition of wastewater purification agent to the treatment tank 1.

[0068] Furthermore, when the screen plate 21 moves downward to press the wastewater purification agent into the wastewater, under the rotation of the rotating disk 27, the connecting frame 22 and the screen plate 21 are driven upward again by the rotating wheel 28. At the same time, the guide rod 23 will move upward. The two rear guide rods 23 move upward, and through the transmission gear 33 and the rotating rod 32, they drive the two transmission gear plates 34 to move upward. The two transmission gear plates 34 move upward, thereby driving the two driven gears 44 to rotate clockwise. The two driven gears 44 drive the hopper 43 to rotate clockwise through the rotating shaft 42, thereby putting the wastewater purification agent onto the screen of the feeding rack 41. After being screened, the qualified wastewater purification agent rolls into the wastewater in the treatment pool 1.

[0069] In this embodiment, the rotating disk 27 continuously rotates, and the reciprocating motion of the screen plate 21 forces the floating purifying agent into the water, breaking the air film on the surface of the purifying agent and helping its internal pores to quickly fill with water, so that the purifying agent quickly changes from a floating state to a wetted state, fundamentally solving the problem of purifying agent floating and improving the neutralization treatment efficiency of acidic industrial wastewater. When the screen plate 21 returns to its original position and the previous batch of purifying agent is effectively pressed into the water, the hopper 43 will rotate clockwise under the cooperation of the transmission gear 33, transmission gear plate 34 and driven gear 44, and a new batch of purifying agent will be added. This can avoid excessive accumulation of purifying agent on the water surface and realize the intermittent addition of purifying agent. The intermittently added purifying agent will be in the floating, suspended and sinking stages respectively. This stage is a suspension fluidization treatment method, which is mainly used to quickly neutralize acidic wastewater and adsorb free heavy metal ions in the water.

[0070] Second embodiment:

[0071] Please see Figures 7 to 11The bottom of the collection chamber 6 is fixedly provided with a disturbance mechanism 7. The disturbance mechanism 7 includes two vertical plates 71 fixedly provided at the bottom of the collection chamber 6. The interior of the two vertical plates 71 is rotatably connected with a drive rod 72. The surface of the drive rod 72 is fixedly provided with two first transmission wheels 73. The two rotating shafts 42 are each fixedly provided with a second transmission wheel 74 at their opposite ends. The two first transmission wheels 73 and the two second transmission wheels 74 are divided into two groups, left and right, and each group is fitted with a transmission belt 75.

[0072] Four reciprocating frames 76 are slidably connected to the back of the treatment pool 1. Three baffles 77 are fixed on the front of the four reciprocating frames 76 and inside the treatment pool 1. Return springs 78 are sleeved on the surface of the four reciprocating frames 76 and on the back of the treatment pool 1. Contact wheels 79 are rotatably connected inside the four reciprocating frames 76. Four cams 710 are fixed on the surface of the drive rod 72. The four cams 710 respectively contact the four contact wheels 79.

[0073] The collection chamber 6 is vertically slidably connected to a striking mechanism 8. The striking mechanism 8 includes a striking bracket 81 vertically slidably connected to the inside of the collection chamber 6. A striking plate 82 is fixedly provided on the top of the striking bracket 81. A reciprocating spring 83 is sleeved on the surface of the striking bracket 81 and located at the bottom of the collection chamber 6. A reciprocating wheel 84 is rotatably connected to the inner side of the bottom of the striking bracket 81. The striking mechanism 8 is arranged in two sets in a mirror image on the left and right sides. The bottom of the two reciprocating wheels 84 respectively contacts the top of the two cams 710 in the middle.

[0074] Preferably, the two reciprocating frames 76 in the middle are fixed to the central spoiler 77, and the two reciprocating frames 76 on both sides are fixed to the two spoilers 77 on both sides respectively. The protrusions of the two cams 710 in the middle face forward in the initial stage, and the protrusions of the two cams 710 on both sides face downward in the initial stage.

[0075] Preferably, the central baffle 77 is located at the bottom of the discharge channel opened in the treatment tank 1;

[0076] Please combine Figures 10 to 12When the hopper 43 finishes feeding, the driven gear 44 drives the hopper 43 to rotate counterclockwise through the rotating shaft 42. During the process of switching the hopper 43 to the receiving state, the rotating shaft 42 drives the drive rod 72 to rotate counterclockwise through the second transmission wheel 74, the transmission belt 75 and the first transmission wheel 73. The drive rod 72 then drives the four cams 710 to rotate counterclockwise. During the rotation of the four cams 710, the two cams in the middle will first push the central baffle 77 forward through the reciprocating frame 76. Then, the two cams on both sides will drive the baffles 77 on both sides to move forward through the reciprocating frames 76 on both sides. When the baffles 77 on both sides move forward, the baffle 77 in the middle will return to its original position under the elastic force of the return spring 78. The baffle 77 in the middle pushes the purifier away from the feeding position. The baffles on both sides push the purifier away with the help of water flow.

[0077] Furthermore, during the process of switching the hopper 43 to receiving material, the screen plate 21 and guide rod 23 are in a descending state. When the hopper 43 completes the state switch, the screen plate 21 and guide rod 23 are still in a descending state, while the transmission gear plate 34 and the driven gear 44 will disengage, the hopper 43 will stop rotating, and it will be fully in the receiving state. The dispersed purifying agent can be pressed into the water by the downward movement of the screen plate 21.

[0078] Furthermore, when the screen plate 21 completes the pressing of the purifying agent and moves upward, when the screen plate 21 moves upward to a certain height, the transmission tooth plate 34 and the driven gear 44 will re-mesh. As the screen plate 21 continues to move upward, the transmission tooth plate 34 will drive the driven gear 44 to rotate clockwise, switching the hopper 43 to the feeding state. During the clockwise rotation and feeding process, the hopper 43 will drive the drive rod 72 to rotate clockwise through the rotating shaft 42, the second transmission wheel 74, the transmission belt 75 and the first transmission wheel 73, and continue to use the baffle plate 77 to disperse the purifying agent.

[0079] Please combine Figure 13 During the process of switching between counterclockwise and clockwise rotation of the two cams 710 in the middle, when the protruding position of the cam 710 contacts the reciprocating wheel 84, it will push the striking bracket 81 and the striking plate 82 to move upward through the reciprocating wheel 84, striking the bottom of the unloading rack 41, causing the unqualified purifying agent to fall into the collection chamber 6.

[0080] In this embodiment, when the hopper 43 completes feeding and is rotated counterclockwise for reset, the rotating shaft 42 will drive the drive rod 72 to rotate counterclockwise through the second transmission wheel 74, the transmission belt 75 and the first transmission wheel 73. When the drive rod 72 rotates, the central and side baffles 77 will work in an alternating forward and backward state. The central baffle 77 will first push the purifying agent at the discharge port away from the discharge position to avoid the accumulation of the newly added purifying agent. Then the side baffles 77 will advance, and with the help of water flow disturbance, the purifying agent will be evenly dispersed to various places in the treatment tank 1. This can solve the problem of concentrated accumulation of purifying agent, which leads to insufficient contact with wastewater, and greatly improve the uniformity and efficiency of wastewater purification.

[0081] Third embodiment:

[0082] Please see Figure 1 , Figure 2 , Figures 12 to 14 The processing tank 1 is laterally rotatably connected to a mixing mechanism 9. The mixing mechanism 9 includes a mixing shaft 91 laterally rotatably connected to the inside of the processing tank 1. Multiple mixing paddles 92 are fixed on the circumferential side of the mixing shaft 91 and inside the processing tank 1. A mounting base 93 is fixed on the left side of the processing tank 1. A mixing motor 94 for driving the mixing shaft 91 to rotate is provided on the top of the mounting base 93.

[0083] The treatment pool 1 has an inlet pipe 10 connected to its left side and two drain pipes 11 connected to its right side. A support frame 12 is fixedly installed at the bottom of the treatment pool 1.

[0084] A water purification tank 13 is provided on the right side of the top of the support frame 12, a mounting bracket 14 is provided on the top of the water purification tank 13, and a stirring device 15 is provided on the top of the mounting bracket 14.

[0085] Preferably, the inlet pipe 10 is used to introduce acidic industrial wastewater into the treatment tank 1, and water valves are provided on the surface of both the inlet pipe 10 and the outlet pipe 11.

[0086] Please combine Figure 14 In the suspension fluidization treatment stage, the mixing motor 94 is started. The rotation of the mixing motor 94 drives the mixing shaft 91 to rotate, and the rotation of the mixing shaft 91 drives the mixing paddle 92 to rotate. Through the rotation of the mixing paddle 92, the wastewater and the purifying agent suspended in the wastewater are mixed. When the wastewater completes the neutralization reaction, the mixing motor 94 is turned off after rapid mixing, and the mixing stops. The top clear liquid is discharged into the clean water tank 13 through the drain pipe 11, while the purifying agent and the settled sludge remain in the treatment tank 1. The purifying agent adsorbs the heavy metals in the sludge to prevent the heavy metals from dissolving again and causing secondary pollution, and the sludge is stabilized.

[0087] In this embodiment, during the suspension fluidization treatment stage, the mixing motor 94 drives the mixing shaft 91 and the mixing paddle 92 to rotate. The rotation of the mixing paddle 92 can maintain the purifying agent in a stable suspension fluidization state, prevent the purifying agent from quickly settling and accumulating at the bottom due to gravity, and ensure that the purifying agent can continuously contact the wastewater to give full play to its adsorption and neutralization effects. During the sedimentation treatment stage, the purifying agent and wastewater are quickly mixed and then the mixing is stopped to allow the purifying agent and sludge to be fully dispersed, thereby improving the purification effect and efficiency of the sludge.

[0088] In another application, the acidic industrial wastewater treatment equipment can be used to treat heavy metal wastewater, such as mining wastewater, smelting wastewater and electroplating wastewater. This type of wastewater is mostly acidic and contains free heavy metal ions. Some wastewater also contains suspended solids and a small amount of organic matter, which require deep purification and sludge stabilization treatment.

[0089] By adding purifying agents targeting heavy metal adsorption, such as modified activated carbon, zeolite-based columnar adsorbents, and hydroxyapatite columnar particles, the floating adsorbent is pressed into the wastewater using the wetting mechanism 2 to break the surface gas film and accelerate the adsorption rate of heavy metal ions. The adsorbent is evenly dispersed by the alternating action of the baffle plate 77 to avoid local accumulation. The mixing paddle 92 maintains the adsorbent in suspension, prolonging the adsorption time. After the reaction is completed, solid and liquid separation is performed to further treat the heavy metals in the sludge, prevent the leaching of heavy metals, and achieve sludge stabilization.

[0090] This invention also provides a wastewater purification agent preparation and purification process.

[0091] Please see Figure 15 The wastewater purification agent preparation and purification process includes the following steps:

[0092] Step S1: Weigh the slag from the lithium spodumene impurity removal plate frame, add deionized water to make slurry, control the slurry concentration at 20%-30%, transfer it to a constant temperature water bath and stir and soak it in water, filter to obtain filtrate A containing lithium hydroxide and filter residue A mainly containing magnesium hydroxide and a small amount of calcium hydroxide.

[0093] Step S2: Pass filtrate A through an ion exchange resin column to remove trace impurity ions, obtaining a pure lithium hydroxide solution. Then, evaporate and concentrate the solution. + When the concentration reaches 15-20 g / L, cooling and crystallization are carried out, and the lithium hydroxide crystals are obtained by filtration. The crystals are then dried to obtain the lithium hydroxide product.

[0094] Step S3: After drying the filter residue A, calcine it to convert magnesium hydroxide into porous magnesium oxide and calcium hydroxide into active calcium oxide.

[0095] Step S4: Pre-mill activated carbon and zeolite powder to the required particle size, then mix the ball-milled powder with the calcined product and alkali-resistant inorganic binder in a mixer, and then extrude and granulate the mixture to obtain columnar particles. After drying, a high-performance wastewater purifier is obtained.

[0096] Step S5: Add wastewater purifying agent to acidic industrial wastewater. Initially, a suspension fluidization treatment method is used, and later a sedimentation treatment method is used to achieve the dual functions of water purification and bottom sediment stabilization.

[0097] Preferably, in step S1, 1000g of spodumene impurity-removed plate frame slag is weighed, an appropriate amount of deionized water is added to make pulp, the pulp concentration is controlled at 20%, and the pulp is transferred to a constant temperature water bath and soaked in water at 85°C for 2 hours with a stirring speed of 350rpm.

[0098] Preferably, in step S2, after removing impurities from filtrate A through an ion exchange resin, it is evaporated and concentrated. When the Li in the solution... + When the concentration reaches 15-20 g / L, it is transferred to a crystallization vessel and cooled and crystallized at 5-10℃ for 2 hours. After filtration, lithium hydroxide crystals are obtained. The crystals are dried in an oven at 95℃ for 4 hours to obtain the lithium hydroxide product.

[0099] Preferably, in step S3, after the filter residue A is dried, it is placed in a muffle furnace and calcined at 550°C for 3 hours at a heating rate of 5°C / min.

[0100] Preferably, in step S4, the calcined product is mixed with activated carbon and zeolite powder in a mass ratio of 70:10:5, and bentonite is added in a total amount of 10-15%. The activated carbon, zeolite powder and bentonite are ball-milled in a planetary ball mill for 60 minutes to the required particle size. Then, the ball-milled mixed powder is gently mixed with the calcined product in a low-speed mixer for 30 minutes. After mixing, the mixture is extruded and granulated to obtain columnar particles. After drying, a high-performance wastewater purifier is obtained.

[0101] In this embodiment, lithium element recovery and waste residue utilization are organically combined. This not only recovers valuable lithium resources but also transforms the remaining waste residue into a wastewater purifier with market value, maximizing resource utilization. By adopting specific calcination and activation modification processes, the prepared wastewater purifier has advantages such as large specific surface area and strong adsorption performance. It can effectively remove pollutants such as heavy metal ions and organic matter from wastewater and neutralize acidic industrial wastewater. Its performance is superior to that of traditional purifiers.

[0102] Please refer to the reference again. Figures 1 to 14 The working principle of the acidic industrial wastewater treatment equipment provided by this invention is as follows:

[0103] Step S1: Start multiple drive motors 26. The drive motors 26 rotate and drive the rotating disk 27 and the rotating wheel 28 to rotate. When the rotating wheel 28 rotates to the bottom, under the elastic force of the spring 25, the connecting frame 22 will drive the mesh plate 21 and the guide rod 23 to move downward.

[0104] In step S2, when the guide rod 23 moves downward, the two rear guide rods 23 will drive the two front transmission gears 33 to rotate. The two front transmission gears 33 drive the two rear transmission gears 33 to rotate through the rotating rod 32. The rotation of the two rear transmission gears 33 drives the two transmission gear plates 34 to move downward. The downward movement of the two transmission gear plates 34 drives the two passive gears 44 to rotate counterclockwise. The two passive gears 44 drive the hopper 43 to rotate counterclockwise through the rotating shaft 42, switching the hopper 43 after adding the purifying agent to the receiving state.

[0105] In step S3, during the process of switching the hopper 43 to the receiving state, the rotating shaft 42 will drive the drive rod 72 to rotate counterclockwise through the second transmission wheel 74, the transmission belt 75 and the first transmission wheel 73. The drive rod 72 will then drive the four cams 710 to rotate counterclockwise. During the rotation of the four cams 710, the two middle cams 710 will first push the middle baffle 77 forward through the reciprocating frame 76. Then, the two cams 710 on both sides will drive the baffles 77 on both sides to move forward through the reciprocating frames 76 on both sides. When the baffles 77 on both sides move forward, the baffle 77 in the middle will return to its original position under the elastic force of the return spring 78. The baffle 77 in the middle pushes the purifier away from the feeding position. The baffles 77 on both sides push the purifier away with the help of water flow.

[0106] Please refer to steps S1 and S2. During the process of switching the material hopper 43 to the receiving state, the screen plate 21 and guide rod 23 are in the descending state. When the material hopper 43 completes the state switching, the screen plate 21 and guide rod 23 are still in the descending state, while the transmission gear plate 34 and the driven gear 44 will disengage, the material hopper 43 will stop rotating, and it will be fully in the receiving state. The dispersed purifying agent can be pressed into the water by the downward movement of the screen plate 21.

[0107] Step S4: In conjunction with step S3, when the screen plate 21 completes the pressing of the purifying agent and moves upward, when the screen plate 21 moves upward to a certain height, the transmission tooth plate 34 and the driven gear 44 will re-mesh. As the screen plate 21 continues to move upward, the transmission tooth plate 34 will drive the driven gear 44 to rotate clockwise, switching the hopper 43 to the feeding state. During the clockwise rotation feeding process, the hopper 43 will drive the drive rod 72 to rotate clockwise through the rotating shaft 42, the second transmission wheel 74, the transmission belt 75 and the first transmission wheel 73. The clockwise rotation of the drive rod 72 will then drive the four cams 710 to rotate clockwise, thereby using the baffle plate 77 to disperse the purifying agent during the feeding process.

[0108] In step S5, combined with steps S3 and S4, during the process of switching between counterclockwise and clockwise rotation of the two cams 710 in the middle, when the protruding position of the cam 710 contacts the reciprocating wheel 84, it will push the striking bracket 81 and the striking plate 82 upward through the reciprocating wheel 84 to strike the bottom of the unloading rack 41, causing the unqualified purifying agent to fall into the collection chamber 6.

[0109] In step S6, during the suspension fluidization treatment stage, in conjunction with steps S1-S5, start the mixing motor 94. The rotation of the mixing motor 94 drives the mixing shaft 91 and the mixing paddle 92 to rotate. Through the rotation of the mixing paddle 92, the wastewater and the purifying agent suspended in the wastewater are mixed, maintaining the purifying agent in a stable suspension fluidization state. When the wastewater completes the neutralization reaction, the mixing motor 94 is turned off after rapid mixing, and the mixing stops. The top clear liquid is discharged into the clean water tank 13 through the drain pipe 11, while the purifying agent and the settled sludge remain in the treatment tank 1, thus entering the sedimentation treatment stage. The purifying agent adsorbs the heavy metals in the sludge, preventing the heavy metals from dissolving again.

[0110] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made under the concept of the present invention using the contents of the present invention specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. An acidic industrial wastewater treatment device, characterized in that, Includes a treatment tank, a wetting mechanism, a transmission mechanism, and a dosing mechanism; The wetting mechanism includes a mesh plate disposed inside the treatment tank. Connecting frames are fixed on both sides of the top of the mesh plate. Three guide rods are fixed on the top of each of the two connecting frames. A sealing plate is disposed on the top of the treatment tank. Six guide seats are fixed inside the sealing plate. The six guide rods are slidably connected to the interior of the six guide seats. Springs are sleeved on the periphery of the six guide rods and at the bottom of the sealing plate. The transmission mechanism includes two rotating seats fixed to the top of the sealing plate. The interior of each of the two rotating seats is longitudinally rotatably connected to a rotating rod. Both ends of the two rotating rods are fixed with transmission gears. The two rear guide rods are provided with tooth grooves on opposite sides. The two front transmission gears mesh with the two rear guide rods respectively. The two rear transmission gears are provided with transmission tooth plates on opposite sides. The two transmission tooth plates mesh with the two rear transmission gears respectively. The feeding mechanism includes a feeding frame fixed to the back of the treatment tank. Two rotating shafts are rotatably connected inside the feeding frame. A hopper is fixed on one side of the two rotating shafts opposite each other. Driven gears are fixed on the circumferential sides of the two rotating shafts and inside the feeding frame. The two driven gears mesh with two transmission gear plates respectively. The two transmission gear plates are vertically slidably connected inside the feeding frame.

2. The acidic industrial wastewater treatment equipment according to claim 1, characterized in that, Two drive motors are respectively provided on the front and back of the treatment pool. Rotary disks are fixed at the output ends of the four drive motors and inside the treatment pool. The four rotary disks are divided into two groups, left and right. Each group of rotary disks has a rotating wheel rotatably connected to the opposite side. The tops of the two groups of rotating wheels are in contact with the bottoms of the two connecting frames respectively.

3. The acidic industrial wastewater treatment equipment according to claim 1, characterized in that, A screen is installed inside the unloading rack and at the bottom of the hopper. A collection bin is fixed at the bottom of the unloading rack. A through groove is opened on the back of the inner wall of the processing pool to cooperate with the unloading rack.

4. The acidic industrial wastewater treatment equipment according to claim 3, characterized in that, The bottom of the collection chamber is fixed with a disturbance mechanism, which includes two vertical plates fixed to the bottom of the collection chamber. The two vertical plates are laterally rotatably connected with a drive rod. The surface of the drive rod is fixed with two first transmission wheels. The two rotating shafts are each fixed with a second transmission wheel at their opposite ends. The two first transmission wheels and the two second transmission wheels are divided into left and right groups, and each group is fitted with a transmission belt.

5. The acidic industrial wastewater treatment equipment according to claim 4, characterized in that, Four reciprocating frames are slidably connected to the back of the treatment pool. Three baffles are fixed on the front of the four reciprocating frames and inside the treatment pool. Return springs are fitted on the surface of the four reciprocating frames and on the back of the treatment pool. Contact wheels are rotatably connected inside the four reciprocating frames. Four cams are fixed on the surface of the drive rod, and the four cams contact the four contact wheels respectively.

6. The acidic industrial wastewater treatment equipment according to claim 5, characterized in that, The collection chamber is vertically slidably connected to a striking mechanism. The striking mechanism includes a striking bracket vertically slidably connected to the inside of the collection chamber. A striking plate is fixed on the top of the striking bracket. A reciprocating spring is sleeved on the surface of the striking bracket and located at the bottom of the collection chamber. A reciprocating wheel is rotatably connected to the inner side of the bottom of the striking bracket. The striking mechanism is arranged in two sets in a left-right mirror image. The bottom of the two reciprocating wheels respectively contacts the top of the two cams in the middle.

7. The acidic industrial wastewater treatment equipment according to claim 1, characterized in that, The processing tank is laterally rotatably connected to a mixing mechanism. The mixing mechanism includes a mixing shaft laterally rotatably connected to the inside of the processing tank. Multiple mixing paddles are fixed on the circumferential side of the mixing shaft and inside the processing tank. A mounting base is fixed on the left side of the processing tank. A mixing motor for driving the mixing shaft to rotate is provided on the top of the mounting base.

8. The acidic industrial wastewater treatment equipment according to claim 1, characterized in that, The treatment tank has an inlet pipe connected to the left side and two drain pipes connected to the right side. A support frame is fixed to the bottom of the treatment tank.

9. The acidic industrial wastewater treatment equipment according to claim 8, characterized in that, A water purification tank is provided on the right side of the top of the support frame, a mounting bracket is provided on the top of the water purification tank, and a stirring device is provided on the top of the mounting bracket.

10. A wastewater purification agent preparation and purification process, characterized in that, Includes the following steps: Step S1: Weigh the slag from the lithium spodumene impurity removal plate frame, add deionized water to make a pulp, transfer the pulp to a constant temperature water bath and stir and soak in water, filter to obtain filtrate A containing lithium hydroxide and filter residue A mainly containing magnesium hydroxide and a small amount of calcium hydroxide. Step S2: Pass filtrate A through an ion exchange resin column to remove trace impurity ions, obtaining a pure lithium hydroxide solution. Then, evaporate and concentrate the solution. + When the concentration reaches 15-20 g / L, cooling and crystallization are carried out, and the lithium hydroxide crystals are obtained by filtration. The crystals are then dried to obtain the lithium hydroxide product. Step S3: After drying the filter residue A, calcine it to convert magnesium hydroxide into porous magnesium oxide and calcium hydroxide into active calcium oxide. Step S4: Pre-mill activated carbon and zeolite powder to the required particle size, then mix the ball-milled powder with the calcined product and alkali-resistant inorganic binder in a mixer, and then extrude and granulate the mixture to obtain columnar particles. After drying, a high-performance wastewater purifier is obtained. Step S5: Add wastewater purifying agent to the acidic industrial wastewater. Initially, a suspension fluidization treatment method is used, and later a sedimentation treatment method is used to achieve the dual functions of water purification and bottom sediment stabilization. The treatment needs to be completed in the acidic industrial wastewater treatment equipment as described in claims 1-9.

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