Pickling solution filtering and purifying equipment for acid regeneration equipment

Abstract

The invention relates to the technical field of filtration and purification equipment, in particular to pickling solution filtration and purification equipment for acid regeneration equipment, which comprises an adsorption tank and a filter screen fixedly mounted on the inner wall of the adsorption tank, a resin layer positioned above the filter screen is filled in the adsorption tank, and a bidirectional synergistic mechanism vertically penetrating through the resin layer is arranged in the adsorption tank. In the waste acid adsorption stage, through anticlockwise rotation pushing of the spiral plate, the downward flowing speed of waste acid in the resin layer is greatly increased, compared with non-spiral-plate pushing, the waste acid treatment amount is greatly increased, the time of the whole filtering and purifying process is greatly shortened, meanwhile, the spiral plate rotates to stir the resin layer, and the adsorption efficiency is improved. Compared with the prior art, the contact area of waste acid and resin is increased, the surfaces, which cannot be in full contact with the waste acid due to static state, of part of resin particles originally are exposed in the stirring process and participate in ion exchange reaction, and meanwhile, the contact time of the waste acid and the resin is prolonged due to a complex flowing path and particle movement.

Description

Technical Field

[0001] The invention relates to the technical field of filtering and purifying equipment, and more specifically, to a kind of acid washing liquid filtering and purifying equipment for acid regeneration equipment. Background Art

[0002] Acid regeneration equipment is used to treat waste acid generated in industrial production, restore its performance and reuse it, and pickling liquid filtration and purification equipment is an important part of acid regeneration equipment, which is used to remove impurities in the pickling liquid and improve the purity and quality of the pickling liquid. The current waste acid filtration methods include chemical precipitation, evaporation concentration and ion exchange.

[0003] The resin adsorption waste acid recovery equipment adopts the ion exchange method, which uses the ion exchange resin layer (formed by uniform accumulation of resin particles and having a certain thickness and pore structure). When the resin adsorption waste acid recovery equipment is working, the salt-containing waste acid passes through the ion exchange resin layer, and the free acid is adsorbed inside the resin particles. The salt cannot enter and flows out of the column first, and then the free acid in the desorbed resin particles is eluted with water to flow out as recovered acid, thereby completing the separation of the free acid and the metal salt. However, the current resin adsorption waste acid recovery equipment still has certain defects: 1. In the current resin adsorption tank, the spiral plate is fixedly installed inside the adsorption tank. When the waste acid flows into the resin layer by gravity and flows through the fixed spiral plate, its flow state changes to a certain extent, but because the spiral plate cannot rotate, it cannot continuously generate a driving force for the waste acid. The flow rate of the waste acid is slow, and the amount of waste acid flowing through the resin layer per unit time is limited. At the same time, the fixed spiral plate cannot stir the resin layer, the resin particles are stationary, and the contact between the waste acid and the resin particles is only carried out at a fixed position and in a fixed manner. The contact area is difficult to effectively increase, and the contact time is not extended due to complex movement, and the ion exchange reaction is difficult to fully proceed.

[0004] 2. During backwashing, high-pressure water enters from the water inlet pipe on the top or side of the adsorption tank. Since the spiral plate is fixed, the resin layer cannot be stirred. The high-pressure water mainly impacts the surface of the resin layer and is difficult to penetrate into the interior. The water flow is easily blocked by the fixed spiral plate, and the resin layer cannot be fully and evenly washed, resulting in some resin particles not being fully cleaned, and the backwashing effect is greatly reduced.

[0005] 3. At present, the stable acid inlet method is mostly used. The acid inlet pressure is constant, and the waste acid flows into the adsorption tank at a steady flow rate. Even if there is a fixed spiral plate, it cannot change the stable state of the fluid boundary layer in the resin layer caused by the stable acid inlet (when the waste acid flows into the adsorption tank at a constant flow rate and pressure, the waste acid flows through the resin layer and forms a relatively stable fluid boundary layer on the surface of the resin particles), which is not conducive to the rapid diffusion of ions in the waste acid to the resin surface, the ion exchange reaction speed is slow, and it takes a long time to reach adsorption equilibrium. In addition, the long-term stable water flow direction makes the resin particles gradually compacted, the porosity is reduced, and the filtration performance is affected. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a pickling liquid filtering and purification equipment for acid regeneration equipment, including an adsorption tank and a filter screen fixedly installed on the inner wall of the adsorption tank, the adsorption tank is filled with a resin layer located above the filter screen, and a bidirectional enhancement mechanism vertically penetrating the resin layer is arranged inside the adsorption tank, and a driving part is installed on the adsorption tank.

[0007] An acid inlet mechanism is arranged on the top of the adsorption tank, and the acid inlet mechanism comprises a pulse component and a control component for driving the pulse component to rotate counterclockwise in cooperation with the two-way enhancement mechanism during the adsorption stage to pulse the waste acid into the adsorption tank.

[0008] The bidirectional enhancement mechanism includes a driving shaft which rotates vertically and passes through the inner wall at the top of the adsorption tank and is provided with a flow channel. The top end of the driving shaft is fixedly connected to the driving unit, and a spiral plate which is inserted into the resin layer and rotates with the inner wall of the adsorption tank is fixedly installed on the outer side of the driving shaft. During the waste acid adsorption stage, the driving unit drives the spiral plate to rotate counterclockwise to increase the contact area between the waste acid and the resin layer and speed up the filtration and purification speed of the waste acid downstream.

[0009] A recoil part is arranged on the outside of the driving shaft. During the backwashing stage, the driving part drives the driving shaft to rotate forward and drives the spiral plate to rotate clockwise. High-pressure water enters the recoil part and flows out through the driving shaft to spray water upward to backwash the resin layer. At the same time, the rotating spiral plate flips the resin layer from bottom to top and drives clean water to flow upward to accelerate the backwashing speed of the resin layer.

[0010] Furthermore, the recoil portion includes a sealing cover fixedly installed between the front and rear inner walls of the motor frame and rotatably sleeved on the outside of the drive shaft. A water inlet pipe is fixedly installed on the right side of the sealing cover, and the water inlet pipe is connected to the internal flow channel of the drive shaft through a plurality of water inlet holes opened on the outside of the drive shaft.

[0011] Furthermore, a plurality of water spray pipes connected to the internal flow channel of the drive shaft are fixedly installed on the outer side of the drive shaft. The plurality of water spray pipes are located in the pitch spacing space of the spiral plate and are evenly distributed in an up-and-down staggered manner. When the drive shaft rotates, the water spray pipes are driven to rotate synchronously to stir the resin layer. In the adsorption stage, the stirring of the water spray pipes can help improve the adsorption efficiency. In the backwashing stage, the rotational stirring of the water spray pipes can achieve backwashing without dead ends, thereby helping to improve the backwashing efficiency.

[0012] Furthermore, the pulse assembly includes an acid inlet cylinder fixedly mounted on the top of the adsorption tank and a return spring fixedly mounted on the inner wall of the top of the acid inlet cylinder, a sealing plate slidably connected to the inner wall of the acid inlet cylinder is fixedly mounted on the bottom end of the return spring, an acid inlet pipe is fixedly mounted on the left side of the acid inlet cylinder, when the return spring is in a naturally extended state, the sealing plate is located above the connection port between the acid inlet pipe and the acid inlet cylinder, and a sliding rod slidably passing through the acid inlet cylinder is fixedly mounted on the top of the sealing plate.

[0013] Furthermore, the control component includes a fixed sleeve fixedly installed on the top of the adsorption tank and rotatably sleeved on the outside of the rotating shaft, a rotating disk is rotatably installed on the top of the fixed sleeve, two extrusion plates are fixedly installed on the top of the rotating disk and are rotationally symmetrically arranged at 180° with the center of the rotating disk as the center, a slope is provided on one side of the extrusion plate, a moving plate is fixedly installed on the top of the sliding rod, and a pressure rod matching the slope of the extrusion plate is fixedly installed on the bottom of the moving plate.

[0014] Furthermore, the control component also includes a ratchet fixedly mounted on the outside of the drive shaft and located on the top of the rotating disk. Two ratchets are rotatably installed on the top of the rotating disk and are symmetrically arranged at 180° with the center of the rotating disk as the center. A torsion spring is arranged between the ratchet and the rotating disk to make the ratchet close to the ratchet.

[0015] Furthermore, an acid discharge pipe for discharging the regenerated acid after filtration is fixedly installed at the bottom of the adsorption tank, and a drainage pipe for discharging the impurity-containing backwash wastewater is fixedly installed at the front side of the adsorption tank.

[0016] The beneficial effects of the present invention are as follows: 1. In the waste acid adsorption stage, the present invention greatly accelerates the downstream speed of the waste acid in the resin layer through the counterclockwise rotation of the spiral plate. More waste acid can flow through the resin layer to receive ion exchange treatment per unit time. Compared with the process without the spiral plate, the treatment capacity of the waste acid is greatly improved, which greatly shortens the time of the entire filtration and purification process. At the same time, the spiral plate rotates and stirs the resin layer, increasing the contact area between the waste acid and the resin. The surfaces of some resin particles that were unable to fully contact the waste acid due to stillness will be exposed during the stirring process and participate in the ion exchange reaction. At the same time, the contact time between the waste acid and the resin is also extended due to the complex flow path and particle movement, which makes the ion exchange reaction more sufficient and improves the removal rate of impurity ions in the waste acid by the resin. Moreover, under the continuous stirring of the spiral plate, the resin particles can always be in a dynamic equilibrium state, effectively avoiding the compression of the resin layer.

[0017] 2. In the backwashing stage, the present invention rotates the water spray pipe to stir the resin layer, and at the same time, the high-pressure water is evenly sprayed on the resin layer as the water spray pipe rotates, so as to achieve 360° backwashing without dead ends. The spiral plate rotates clockwise to flip the resin layer from bottom to top. On the one hand, this flipping breaks the compacted state of the resin layer formed in the adsorption stage, so that the gaps between the resin particles are increased, which is convenient for high-pressure water penetration and impurity discharge. On the other hand, the flipping of the spiral plate will drive the clean water to flow up, thus accelerating the backwashing speed of the resin layer. Under the push of the spiral plate, the clean water forms convection with the high-pressure water sprayed from the water spray pipe, further enhancing the flushing effect on the resin layer, and flushing down the impurities adsorbed in the resin layer.

[0018] 3. In the adsorption stage, the present invention adopts a pulsed acid inlet method to make the acid inlet pressure show periodic changes. The formed pulsed water flow can effectively break the fluid boundary layer in the resin layer. At the moment of pressure increase, the waste acid rushes into the resin layer at a high speed, which accelerates the diffusion rate of ions in the waste acid to the resin surface, greatly promoting the ion exchange reaction. Compared with the stable acid inlet method, the mass transfer coefficient can be increased by 20%-30%, which significantly shortens the time to reach adsorption equilibrium and improves the overall filtration and purification efficiency. At the same time, the periodic pulsed water flow produces intermittent impact on the resin layer, which can prevent the resin particles from being gradually compacted due to long-term single-direction water flow. This impact keeps the resin particles in a state of continuous micro-disturbance, maintains the good pore structure and permeability of the resin layer, and reduces the decline in filtration performance and the need for frequent backwashing due to resin compaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0020] Figure 2 yes Figure 1 A partial enlarged view of part A.

[0021] Figure 3 It is a schematic diagram of the internal structure of the adsorption tank of the present invention.

[0022] Figure 4 It is a partial structural schematic diagram of the driving shaft, spiral plate, acid inlet pipe and water spray pipe of the present invention.

[0023] Figure 5 It is a partial structural schematic diagram of the return spring, sealing plate, sliding rod, driving motor and acid inlet pipe of the present invention.

[0024] Figure 6 The utility model is a partial cross-sectional view of the acid inlet cylinder, the return spring, the sealing plate, the sliding rod and the acid inlet pipe of the present invention.

[0025] Figure 7 It is an exploded structural diagram of the rotating disk, the extrusion plate, the ratchet wheel and the ratchet pawl of the present invention.

[0026] In the figure: 1. adsorption tank; 2. two-way enhancement mechanism; 201. drive shaft; 202. spiral plate; 3. acid inlet mechanism; 301. pulse assembly; 3011. acid inlet cylinder; 3012. reset spring; 3013. sealing plate; 3014. slide rod; 3015. acid inlet pipe; 302. control assembly; 3021. rotating disk; 3022. extrusion plate; 3023. moving plate; 3024. pressure rod; 3025. ratchet; 3026. pawl; 3027. fixed sleeve; 4. recoil unit; 401. water inlet pipe; 402. water spray pipe; 403. sealing cover; 404. water inlet hole; 5. motor frame; 6. drive motor; 7. acid discharge pipe; 8. filter screen; 9. drain pipe; 10. heating coil. DETAILED DESCRIPTION

[0027] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is to enable those skilled in the art to better understand and implement the subject matter described herein. The functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the present specification. Various examples may omit, replace or add various processes or components as needed. In addition, the features described relative to some examples may also be combined in other examples.

[0028] See also Figure 1 , Figure 2 and Figure 3, a pickling liquid filtering and purification device for an acid regeneration device, comprising an adsorption tank 1 and a filter screen 8 fixedly mounted on the inner wall of the adsorption tank 1, the adsorption tank 1 is filled with a resin layer located above the filter screen 8, and the adsorption tank 1 is provided with a two-way enhancement mechanism 2 located above the filter screen 8 and vertically penetrating the resin layer, a driving unit is installed on the top of the adsorption tank 1, and the driving unit comprises a motor frame 5 fixedly mounted on the top of the adsorption tank 1 and a driving motor 6 fixedly mounted inside the motor frame 5 and used to drive the two-way enhancement mechanism 2 to rotate, the two-way enhancement mechanism 2 comprises a driving shaft 201 which vertically rotates and penetrates the inner wall of the top of the adsorption tank 1 and is provided with a flow channel, a recoil portion 4 is arranged on the outside of the driving shaft 201, a heat-insulating interlayer is arranged on the outside of the adsorption tank 1, a heating coil 10 is arranged in the heat-insulating interlayer, an acid discharge pipe 7 for discharging the regenerated acid after filtration is fixedly mounted on the bottom of the adsorption tank 1, and a drain pipe 9 for discharging recoil wastewater containing impurities is fixedly mounted on the front side of the adsorption tank 1.

[0029] It should be noted that the material of the filter 8 can be selected from corrosion-resistant stainless steel, and the mesh size of the filter 8 can be selected according to the size of the resin particles, preferably 20-50 meshes, to ensure that it can effectively block the resin particles from flowing out with the waste acid without causing excessive resistance to the flow of the waste acid.

[0030] The heating coil 10 is connected to the external heat source through a circulation pump, and a temperature sensor is provided inside the adsorption tank 1 to monitor the temperature inside the adsorption tank 1 in real time (the circulation pump and the temperature sensor are common knowledge to those skilled in the art, and therefore are not described in detail in the present invention). During the waste acid filtration and purification process, the temperature inside the adsorption tank 1 can be adjusted as needed, and the temperature is preferably 20-40°C to improve the ion exchange efficiency.

[0031] The diameter of the acid discharge pipe 7 is designed according to the treatment volume and flow rate of the waste acid, preferably 80-120 mm. A valve is installed on the acid discharge pipe 7 to control the discharge of the regenerated acid. The material of the acid discharge pipe 7 is corrosion-resistant plastic or metal, preferably polypropylene or stainless steel. The diameter of the drain pipe 9 is designed according to the water flow during backwashing, preferably 100-150 mm. A valve is also installed on the drain pipe 9 to control the discharge of wastewater. The material of the drain pipe 9 needs to be corrosion-resistant, preferably PVC or stainless steel.

[0032] See also Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6An acid inlet mechanism 3 is provided on the top of the adsorption tank 1, and the acid inlet mechanism 3 includes a pulse component 301 and a control component 302 for cooperating with the two-way enhancement mechanism 2 to rotate counterclockwise to drive the pulse component 301 to pulse the waste acid in the adsorption stage, wherein the pulse component 301 includes an acid inlet cylinder 3011 fixedly mounted on the top of the adsorption tank 1 and a return spring 3012 fixedly mounted on the inner wall of the top of the acid inlet cylinder 3011, a sealing plate 3013 slidably connected to the inner wall of the acid inlet cylinder 3011 is fixedly mounted on the bottom end of the return spring 3012, an acid inlet pipe 3015 is fixedly mounted on the left side of the acid inlet cylinder 3011, when the return spring 3012 is in a naturally extended state, the sealing plate 3013 is located above the connection port between the acid inlet pipe 3015 and the acid inlet cylinder 3011, and a sliding rod 3014 slidably penetrating the acid inlet cylinder 3011 is fixedly mounted on the top of the sealing plate 3013.

[0033] It should be noted that the drive shaft 201 is made of high-strength, corrosion-resistant alloy steel, preferably 316L stainless steel. The acid inlet cylinder 3011, the acid inlet pipe 3015 and the sealing plate 3013 are all made of corrosion-resistant plastic or metal, preferably polyethylene or stainless steel. The elastic coefficient of the reset spring 3012 is selected according to the requirements of the acid inlet pressure and the pulse frequency, preferably between 50-100N / mm.

[0034] When in use, waste acid is first injected into the adsorption tank 1 through the acid inlet pipe 3015, and the temperature sensor monitors the temperature in the adsorption tank 1 in real time. When the temperature is lower than the set range of 20-40°C, the control system starts the circulation pump to transport the heat medium generated by the external heat source to the insulation interlayer of the adsorption tank 1 through the heating coil 10. The heat medium flows in the heating coil 10 and transfers the heat to the waste acid and resin layer in the adsorption tank 1 through heat conduction, so that the temperature gradually rises and stabilizes within the set range.

[0035] See also Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6The control assembly 302 includes a fixed sleeve 3027 fixedly mounted on the top of the adsorption tank 1 and rotatably sleeved on the outside of the driving shaft 201, a rotating disk 3021 is rotatably mounted on the top of the fixed sleeve 3027, two extrusion plates 3022 are fixedly mounted on the top of the rotating disk 3021 and are symmetrically arranged at 180° with the center of the rotating disk 3021 as the center, a slope is arranged on one side of the extrusion plate 3022, a moving plate 3023 is fixedly mounted on the top of the sliding rod 3014, and a moving plate 3023 is fixedly mounted on the bottom of the moving plate 3023. The pressure rod 3024 cooperates with the slope of the pressure plate 3022, and when the rotating disk 3021 rotates, it drives the slope of the extrusion plate 3022 to squeeze and lift the sliding rod 3014, and the return spring 3012 shrinks under pressure, and then the sealing plate 3013 is lifted up through the moving plate 3023 and the sliding rod 3014 to draw the waste acid in the acid inlet cylinder 3011, thereby reducing the acid inlet pressure. When the pressure rod 3024 is separated from the extrusion plate 3022, the rebound force of the return spring 3012 drives the sealing plate 3013 to return to its original position and push the waste acid, thereby instantly increasing the acid inlet pressure.

[0036] It should be noted that the rotating disk 3021 and the driving shaft 201 are both connected to the fixing sleeve 3027 via bearings.

[0037] See also Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 The control component 302 also includes a ratchet 3025 fixedly sleeved on the outside of the driving shaft 201 and located on the top of the rotating disk 3021. Two ratchets 3026 are rotatably installed on the top of the rotating disk 3021 and are symmetrically arranged at 180° with the center of the rotating disk 3021 as the center. A torsion spring (not shown in the figure) is arranged between the ratchet 3026 and the rotating disk 3021. The ratchet 3026 is pressed against the ratchet 3025 through the torsion spring. When the driving shaft 201 rotates counterclockwise, the ratchet 3025 will be driven to push the ratchet 3026, thereby driving the rotating disk 3021 to rotate. When the driving shaft 201 drives the ratchet 3025 to rotate clockwise, the ratchet 3026 slides on the back of the teeth of the ratchet 3025. At this time, the ratchet 3026 does not mesh with the teeth of the ratchet 3025.

[0038] In specific use, during the injection of waste acid, when the driving motor 6 controls the driving shaft 201 to rotate counterclockwise, the driving shaft 201 drives the ratchet 3025 to rotate, and the ratchet 3025 pushes the pawl 3026, thereby driving the rotating disk 3021 to rotate, and the rotating disk 3021 drives the two extrusion plates 3022 to rotate accordingly. When the extrusion plates 3022 rotate until their slopes contact the pressure rods 3024, as the rotating disk 3021 continues to rotate, the slopes of the extrusion plates 3022 gradually squeeze the pressure rods 3024 so that It moves upward, and the pressure rod 3024 drives the movable plate 3023 to move upward, so that the sliding rod 3014 drives the sealing plate 3013 to rise synchronously and compress the reset spring 3012. During the rising process of the sealing plate 3013, the internal space of the acid inlet cylinder 3011 increases, and the resistance of the waste acid flowing into the acid inlet cylinder 3011 decreases. According to the principles of fluid mechanics, when the flow rate of the acid inlet pipe 3015 remains unchanged, the internal pressure of the acid inlet cylinder 3011 decreases, and more waste acid can flow smoothly into the acid inlet cylinder 3011.

[0039] As the rotating disk 3021 continues to rotate, when the pressure rod 3024 is separated from the extrusion plate 3022, the reset spring 3012 releases elastic potential energy, driving the sealing plate 3013 to quickly reset downward. During the resetting process of the sealing plate 3013, the internal space of the acid inlet cylinder 3011 is suddenly reduced, and the resistance of the waste acid flowing out of the acid inlet cylinder 3011 increases. The flow rate of the waste acid in the acid inlet pipe 3015 is hindered in a short time. According to the Bernoulli equation, the pressure increases when the flow rate decreases, thereby increasing the acid inlet pressure instantaneously, and the waste acid in the acid inlet cylinder 3011 is quickly pressed into the adsorption tank 1 to achieve pulse acid inlet. The pulse acid inlet causes the acid inlet pressure to change periodically, and the pulse water flow formed can effectively break the flow in the resin layer. At the moment of pressure increase, the waste acid rushes into the resin layer at high speed, which accelerates the diffusion rate of ions in the waste acid to the resin surface, greatly promoting the ion exchange reaction. Compared with the stable acid inlet method, the mass transfer coefficient can be increased by 20%-30%, significantly shortening the time to reach adsorption equilibrium and improving the overall filtration and purification efficiency. At the same time, the periodic pulse water flow has an intermittent impact on the resin layer, which can prevent the resin particles from being gradually compacted due to long-term single-direction water flow. This intermittent impact keeps the resin particles in a state of continuous micro-disturbance, maintains the good pore structure and permeability of the resin layer, and reduces the problems of decreased filtration performance and frequent backwashing requirements due to resin compaction.

[0040] See also Figure 3 , Figure 4 and Figure 5The top end of the driving shaft 201 is fixedly connected to the driving part, and a spiral plate 202 is fixedly installed on the outside of the driving shaft 201, which is inserted into the resin layer and rotates with the inner wall of the adsorption tank 1. In the waste acid adsorption stage, the driving motor 6 drives the spiral plate 202 to rotate counterclockwise through the driving shaft 201, thereby increasing the contact area between the waste acid and the resin layer and accelerating the filtering and purification speed of the waste acid downstream.

[0041] During specific use, during the waste acid injection process, the driving motor 6 controls the driving shaft 201 to rotate counterclockwise, and at the same time, it also drives the spiral plate 202 and the recoil part 4 to rotate. During the rotation of the spiral plate 202, on the one hand, the blades of the spiral plate 202 push the waste acid to accelerate downward flow in the resin layer along the spiral trajectory. From the perspective of fluid mechanics, the rotation of the spiral plate 202 provides additional driving force for the waste acid, changes the flow state of the waste acid in the resin layer, and significantly increases the flow rate of the waste acid. On the other hand, during the rotation of the spiral plate 202, the resin layer is continuously stirred. The resin particles were originally relatively static. Under the stirring of the spiral plate 202, the positions between the particles have changed, forming a complex motion trajectory. This stirring breaks the local concentration gradient that may exist in the resin layer, allowing the waste acid to contact the resin particles more fully. At the same time, the rotation of the recoil part 4 also stirs the resin layer, increases the contact area and time between the waste acid and the resin, and helps improve the adsorption efficiency. The regenerated acid liquid filtered and purified by the resin layer is discharged through the acid discharge pipe 7 under the action of gravity.

[0042] During the backwashing stage, the driving shaft 201 drives the spiral plate 202 to rotate clockwise. At this time, the spiral plate 202 flips the lower layer of resin upward, and cooperates with the high-pressure water spray of the backwashing part 4 to achieve all-round cleaning of the resin layer. This flipping action allows all parts of the resin layer to be evenly backwashed, avoiding the problem of incomplete local cleaning. After backwashing, the exchange capacity of the resin is restored more evenly, which extends the overall service life of the resin and reduces the operating cost of the equipment.

[0043] See also Figure 3 , Figure 4 and Figure 5 In the backwashing stage, the driving motor 6 drives the driving shaft 201 to rotate forward and drives the spiral plate 202 to rotate clockwise. The backwashing part 4 takes in high-pressure water and flows out through the driving shaft 201 to spray water upward to backwash the resin layer. At the same time, the rotating spiral plate 202 flips the resin layer from bottom to top and drives the clean water to flow upward to accelerate the backwashing speed of the resin layer.

[0044] See also Figure 2 , Figure 3 , Figure 4 and Figure 5The recoil portion 4 includes a sealing cover 403 fixedly installed between the front and rear inner walls of the motor frame 5 and rotatably sleeved on the outside of the driving shaft 201. A water inlet pipe 401 is fixedly installed on the right side of the sealing cover 403. The water inlet pipe 401 is connected to the internal flow channel of the driving shaft 201 through a plurality of water inlet holes 404 opened on the outside of the driving shaft 201.

[0045] It should be noted that in order to ensure the recoil effect, the water pressure of the water inlet pipe 401 needs to be maintained in a specific high-pressure range, preferably 0.5-1.5MPa, to avoid the situation where the water pressure is too low and insufficient impact force is generated, making it difficult to effectively flush out the impurities adsorbed in the resin layer, resulting in incomplete recoil and affecting the filtration and purification effect.

[0046] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 A plurality of water spray pipes 402 connected to the internal flow channel of the driving shaft 201 are fixedly installed on the outer side of the driving shaft 201. The plurality of water spray pipes 402 are located in the pitch spacing space of the spiral plate 202 and are evenly distributed in an up-and-down staggered manner. When the driving shaft 201 rotates, the water spray pipes 402 are driven to rotate synchronously to stir the resin layer. In the adsorption stage, the stirring of the water spray pipes 402 can help improve the adsorption efficiency. In the backwashing stage, the rotating stirring of the water spray pipes 402 can achieve dead-angle recoil, thereby helping to improve the recoil efficiency.

[0047] It should be noted that the water spray pipe 402 is made of corrosion-resistant stainless steel, and the pipe diameter is preferably 15-25 mm. The nozzle of the water spray pipe 402 is conical to ensure that water can be evenly sprayed on the resin layer during recoil to achieve recoil without dead angles.

[0048] When in use, in the backwashing stage, external high-pressure water flows into the sealing cover 403 through the water inlet pipe 401 and enters the internal flow channel of the drive shaft 201 through a plurality of water inlet holes 404 opened on the outside of the drive shaft 201, and finally is sprayed out through the water spray pipe 402 to backwash the resin layer. At the same time, the driving motor 6 changes direction, and the drive shaft 201 changes from counterclockwise rotation in the adsorption stage to clockwise rotation, driving the water spray pipe 402 and the spiral plate 202 to rotate synchronously, and at this time, the pawl 3026 slides on the back of the ratchet 3025 teeth, and the pawl 3026 does not mesh with the gear teeth of the ratchet 3025. The rotation of the water spray pipe 402 can stir the resin layer, and at the same time, as the water spray pipe 402 rotates The movement can also spray high-pressure water evenly on the resin layer to achieve 360° recoil without dead ends. The spiral plate 202 rotates clockwise to flip the resin layer from bottom to top. On the one hand, this flipping breaks the compacted state of the resin layer formed in the adsorption stage, increases the gaps between the resin particles, and facilitates the penetration of high-pressure water and the discharge of impurities. On the other hand, the flipping of the spiral plate 202 drives the clean water to flow upward, accelerating the backwashing speed of the resin layer. Under the push of the spiral plate 202, the clean water forms convection with the high-pressure water sprayed from the water spray pipe 402, further enhancing the flushing effect on the resin layer, and flushing down the impurities adsorbed in the resin layer. During the backwashing process, the waste water is continuously discharged through the drain pipe 9.

[0049] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. A pickling liquid filtering and purification device for acid regeneration equipment, comprising an adsorption tank and a filter screen installed on the inner wall thereof, wherein the adsorption tank is filled with a resin layer located above the filter screen, characterized in that: A bidirectional synergistic mechanism vertically penetrating the resin layer is arranged inside the adsorption tank, and a driving part is installed on the adsorption tank; An acid inlet mechanism is provided on the top of the adsorption tank, and the acid inlet mechanism includes a pulse component and a control component for driving the pulse component to rotate counterclockwise in cooperation with the two-way enhancement mechanism during the adsorption stage to pulse the waste acid into the adsorption tank; The two-way enhancement mechanism includes a drive shaft that rotates vertically and penetrates the inner wall of the top of the adsorption tank and has a flow channel inside. The top of the drive shaft is fixedly connected to the drive unit, and a spiral plate that is inserted into the resin layer and rotates with the inner wall of the adsorption tank is fixedly installed on the outside of the drive shaft. In the waste acid adsorption stage, the drive unit drives the spiral plate to rotate counterclockwise to increase the contact area between the waste acid and the resin layer and speed up the filtration and purification speed of the waste acid downstream; A recoil part is arranged on the outside of the driving shaft. During the backwashing stage, the driving part drives the driving shaft to rotate forward and drives the spiral plate to rotate clockwise. High-pressure water enters the recoil part and flows out through the driving shaft to spray water upward to backwash the resin layer. At the same time, the rotating spiral plate flips the resin layer from bottom to top and drives clean water to flow upward to accelerate the backwashing speed of the resin layer.

2. The pickling liquid filtering and purification equipment for acid regeneration equipment according to claim 1, characterized in that: The driving part includes a motor frame fixedly installed on the top of the adsorption tank and a driving motor fixedly installed inside the motor frame and used to drive the two-way efficiency enhancement mechanism to rotate. The recoil part includes a sealing cover fixedly installed between the front and rear inner walls of the motor frame and rotatably sleeved on the outside of the driving shaft. A water inlet pipe is fixedly installed on the right side of the sealing cover. The water inlet pipe is connected to the internal flow channel of the driving shaft through a plurality of water inlet holes opened on the outside of the driving shaft.

3. The pickling liquid filtering and purifying device for acid regeneration equipment according to claim 2, characterized in that: A plurality of water spray pipes connected to the internal flow channel of the drive shaft are fixedly installed on the outer side of the drive shaft. The plurality of water spray pipes are located in the pitch spacing space of the spiral plate and are evenly distributed in an up-and-down staggered manner. When the drive shaft rotates, the water spray pipes are driven to rotate synchronously to stir the resin layer. In the backwashing stage, backwashing without dead angles is achieved through the rotating stirring of the water spray pipes.

4. The pickling liquid filtering and purifying device for acid regeneration equipment according to claim 1, characterized in that: The pulse assembly includes an acid inlet cylinder fixedly mounted on the top of the adsorption tank and a return spring fixedly mounted on the inner wall of the top of the acid inlet cylinder, a sealing plate fixedly mounted on the bottom end of the return spring and slidably connected to the inner wall of the acid inlet cylinder, an acid inlet pipe fixedly mounted on the left side of the acid inlet cylinder, when the return spring is in a naturally extended state, the sealing plate is located above the connection port between the acid inlet pipe and the acid inlet cylinder, and a sliding rod slidingly penetrating the acid inlet cylinder is fixedly mounted on the top of the sealing plate.

5. The pickling liquid filtering and purifying device for acid regeneration equipment according to claim 4, characterized in that: The control component includes a fixed sleeve fixedly installed on the top of the adsorption tank and rotatably sleeved on the outside of the driving shaft, a rotating disk is rotatably installed on the top of the fixed sleeve, two extrusion plates are fixedly installed on the top of the rotating disk and are rotationally symmetrically arranged at 180° with the center of the rotating disk as the center, a slope is provided on one side of the extrusion plate, a moving plate is fixedly installed on the top of the sliding rod, and a pressure rod matching the slope of the extrusion plate is fixedly installed on the bottom of the moving plate.

6. The pickling liquid filtering and purifying device for acid regeneration equipment according to claim 5, characterized in that: The control component also includes a ratchet wheel fixedly mounted on the outside of the driving shaft and located on the top of the rotating disk. Two ratchets are rotatably installed on the top of the rotating disk and are symmetrically arranged at 180° with the center of the rotating disk as the center. A torsion spring is arranged between the ratchet wheel and the rotating disk to make the ratchet wheel close to the ratchet wheel.

7. The pickling liquid filtering and purifying device for acid regeneration equipment according to claim 1, characterized in that: An acid discharge pipe for discharging the regenerated acid after filtration is fixedly installed at the bottom of the adsorption tank, and a drainage pipe for discharging the impurity-containing backwash wastewater is fixedly installed at the front side of the adsorption tank.

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