An acid cleaning solution filtering and purifying device for an acid regeneration equipment

Abstract

The present invention relates to the technical field of filtration and purification equipment, and relates to an acid cleaning solution filtration and purification equipment for an acid regeneration equipment, which includes an adsorption tank and a filter screen fixedly installed on the inner wall of the adsorption tank. The inside of the adsorption tank is filled with a resin layer located above the filter screen, and a two-way synergistic mechanism vertically penetrating the resin layer is arranged inside the adsorption tank. In the waste acid adsorption stage of the present invention, through the promotion of the counterclockwise rotation of the spiral plate, the downward flow rate of the waste acid in the resin layer is greatly increased. Compared with the situation without the promotion of the spiral plate, the treatment amount of the waste acid is greatly improved, and the time of the entire filtration and purification process is greatly shortened. At the same time, the spiral plate rotates to stir 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 being stationary 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.

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. Currently, the stable acid inlet mode is mostly adopted, with a constant acid inlet pressure. The waste acid flows into the adsorption tank at a stable flow rate. Even if there is a fixed spiral plate, it cannot change the stable condition 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, a relatively stable fluid boundary layer will form on the surface of the resin particles when the waste acid flows through the resin layer), which is not conducive to the rapid diffusion of ions in the waste acid to the resin surface. The ion exchange reaction rate is slow, and the time required to reach the adsorption equilibrium is long. Moreover, the long-term stable water flow direction gradually compacts the resin particles, reducing the porosity and affecting the filtration performance. Summary of the Invention

[0006] In order to solve the above technical problems, the present invention provides an acid washing solution filtering and purifying device for an acid regeneration device, including an adsorption tank and a filter screen fixedly installed on the inner wall of the adsorption tank. The inside of the adsorption tank is filled with a resin layer located above the filter screen. A two-way 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 at the top of the adsorption tank. 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.

[0008] The two-way enhancement mechanism includes a driving shaft vertically rotating through the inner wall of the top of the adsorption tank and having a flow channel inside. The top end of the driving shaft is fixedly connected to the driving part. A spiral plate is fixedly installed on the outer side of the driving shaft and inserted into the resin layer and rotatably matched with the inner wall of the adsorption tank. During the waste acid adsorption stage, the driving part drives the spiral plate to rotate counterclockwise to increase the contact area between the waste acid and the resin layer and accelerate the filtration and purification speed of the waste acid flowing downward.

[0009] A backwashing part is arranged on the outer side 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. The backwashing part injects high-pressure water and sprays water upward to backwash the resin layer through the driving shaft. At the same time, the rotating spiral plate turns the resin layer from bottom to top and drives the clear water to flow upward to accelerate the backwashing speed of the resin layer.

[0010] Furthermore, the backwashing part includes a sealing cover fixedly installed between the front and rear inner walls of the motor frame and rotatably sleeved on the outer side of the driving shaft. A water inlet pipe is fixedly installed on the right side of the sealing cover. The water inlet pipe is communicated with the internal flow channel of the driving shaft through a plurality of water inlet holes opened on the outer side of the driving shaft.

[0011] Furthermore, a plurality of water spray pipes communicating with 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 all located in the pitch interval space of the spiral plate and are evenly distributed in a vertically staggered manner. When the drive shaft rotates, it will drive the water spray pipes to rotate synchronously to stir the resin layer. During the adsorption stage, the agitation of the water spray pipes can assist in improving the adsorption efficiency. During the backwashing stage, the rotational agitation of the water spray pipes can achieve dead - angle - free backwashing, thereby assisting in improving the backwashing efficiency.

[0012] Furthermore, the pulse assembly includes an acid inlet cylinder fixedly installed on the top of the adsorption tank and a return spring fixedly installed on the inner wall of the top of the acid inlet cylinder. The bottom end of the return spring is fixedly installed with a sealing plate slidably connected to the inner wall of the acid inlet cylinder. The left side of the acid inlet cylinder is fixedly installed with an acid inlet pipe. When the return spring is in a natural extended state, the sealing plate is located above the connection port of the acid inlet pipe and the acid inlet cylinder. The top of the sealing plate is fixedly installed with a sliding rod that penetrates through the acid inlet cylinder.

[0013] Furthermore, the control assembly includes a fixed sleeve fixedly installed on the top of the adsorption tank and rotatably sleeved outside the rotating shaft. A rotating disk is rotatably installed on the top of the fixed sleeve. Two pressing plates symmetrically arranged at 180° with the center of the rotating disk as the center are fixedly installed on the top of the rotating disk. One side of the pressing plate is provided with a slope surface. The top end of the sliding rod is fixedly installed with a moving plate, and a pressing rod that cooperates with the slope surface of the pressing plate is fixedly installed at the bottom of the moving plate.

[0014] Furthermore, the control assembly also includes a ratchet fixedly sleeved outside the drive shaft and located on the top of the rotating disk. Two pawls symmetrically arranged at 180° with the center of the rotating disk as the center are rotatably installed on the top of the rotating disk. A torsion spring is arranged between the pawl and the rotating disk to make the pawl press tightly against the ratchet.

[0015] Furthermore, a drain acid pipe for discharging the filtered regenerated acid is fixedly installed at the bottom of the adsorption tank, and a drain pipe for discharging the impurity - containing backwash wastewater is fixedly installed on 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 of the present invention, through the promotion of the counterclockwise rotation of the spiral plate, the downward flow rate of the waste acid in the resin layer is significantly accelerated. In unit time, more waste acid can flow through the resin layer to receive ion exchange treatment. Compared with the situation without the promotion of the spiral plate, the treatment amount of the waste acid is greatly increased, and the time of the entire filtration and purification process is greatly shortened. 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 being stationary 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, improves the removal rate of impurity ions in the waste acid by the resin, and under the continuous stirring of the spiral plate, the resin particles can always be in a dynamic equilibrium state, effectively avoiding the occurrence of resin layer compaction phenomenon.

[0017] 2. In the backwashing stage of the present invention, the resin layer is rotated and stirred by the water spraying pipe, and at the same time, high-pressure water is evenly sprayed on the resin layer as the water spraying pipe rotates, realizing 360° dead-angle-free backwashing. The spiral plate rotates clockwise to turn the resin layer from bottom to top. On the one hand, this turning breaks the compacted state formed by the resin layer in the adsorption stage, increases the gaps between the resin particles, facilitates the penetration of high-pressure water and the discharge of impurities. On the other hand, the turning of the spiral plate drives the upward flow of clear water, accelerating the backwashing speed of the resin layer. The clear water, under the promotion of the spiral plate, forms a convection with the high-pressure water sprayed by the water spraying pipe, further enhancing the washing effect on the resin layer and flushing down the impurities adsorbed in the resin layer.

[0018] 3. In the adsorption stage of the present invention, by adopting the pulse acid inlet mode, the acid inlet pressure shows periodic changes, and the formed pulse water flow can effectively break the fluid boundary layer in the resin layer. At the moment when the pressure increases, the waste acid rushes into the resin layer at high speed, accelerating the diffusion rate of ions in the waste acid to the resin surface and greatly promoting the progress of the ion exchange reaction. Compared with the stable acid inlet mode, 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 generates intermittent impacts on the resin layer, which can avoid the resin particles from being gradually compacted due to the long-term action of the water flow in a single direction. This impact makes the resin particles in a continuous micro-perturbation state, maintaining the good pore structure and permeability of the resin layer, and reducing the decline of filtration performance and the frequent need for backwashing caused by resin compaction. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0020] Figure 2 is Figure 1 a partial enlarged view of part A in

[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 schematic diagram of the partial structure of the drive shaft, spiral plate, acid inlet pipe and water spray pipe of the present invention.

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

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

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

[0026] In the figure: 1. Adsorption tank; 2. Double-effect mechanism; 201. Drive shaft; 202. Spiral plate; 3. Acid inlet mechanism; 301. Pulse component; 3011. Acid inlet cylinder; 3012. Return spring; 3013. Sealing plate; 3014. Sliding rod; 3015. Acid inlet pipe; 302. Control component; 3021. Rotating disk; 3022. Extrusion plate; 3023. Moving plate; 3024. Compressed rod; 3025. Ratchet; 3026. Pawl; 3027. Fixed sleeve; 4. Backflush part; 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 implementation manners

[0027] Now, the subject matter described herein will be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed so that those skilled in the art can better understand and thus implement the subject matter described herein. The functions and arrangements of the elements discussed can be changed without departing from the scope of protection of the content of this specification. Each example can omit, substitute or add various processes or components as needed. Additionally, the features described relative to some examples can also be combined in other examples.

[0028] Refer to Figure 1 , Figure 2 and Figure 3, An acid cleaning solution filtration and purification device for an acid regeneration device, comprising an adsorption tank 1 and a filter screen 8 fixedly installed on the inner wall of the adsorption tank 1. The interior of the adsorption tank 1 is filled with a resin layer above the filter screen 8. A two-way boosting mechanism 2 is arranged inside the adsorption tank 1 above the filter screen 8 and vertically penetrates the resin layer. A driving part is installed at the top of the adsorption tank 1. The driving part includes a motor bracket 5 fixedly installed at the top of the adsorption tank 1 and a driving motor 6 fixedly installed inside the motor bracket 5 for driving the two-way boosting mechanism 2 to rotate. The two-way boosting mechanism 2 includes a driving shaft 201 that vertically rotates through the inner wall of the top of the adsorption tank 1 and is provided with a flow channel inside. A backwashing part 4 is arranged on the outer side of the driving shaft 201. A heat preservation layer is arranged on the outer side of the adsorption tank 1, and a heating coil 10 is arranged inside the heat preservation layer. A drain pipe 7 for discharging the filtered regenerated acid is fixedly installed at the bottom of the adsorption tank 1. A drain pipe 9 for discharging the impurity-containing backwashing wastewater is fixedly installed on the front side of the adsorption tank 1.

[0029] It should be noted that the material of the filter screen 8 can be selected as corrosion-resistant stainless steel, and the mesh number of the filter screen 8 can be selected according to the size of the resin particles, preferably 20 - 50 meshes, to ensure that the resin particles can be effectively blocked from flowing out with the waste acid and will not cause too much resistance to the flow of the waste acid.

[0030] The heating coil 10 is connected to an external heat source through a circulation pump. A temperature sensor is arranged inside the adsorption tank 1 to monitor the temperature inside the adsorption tank 1 in real time (the circulation pump and the temperature sensor, etc. are all well-known common knowledge to those skilled in the art, so they will not be elaborated in this invention). During the filtration and purification process of the waste acid, 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 drain 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 drain pipe 7 to control the discharge of the regenerated acid. The material of the drain 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 the wastewater. The material of the drain pipe 9 needs to be corrosion-resistant, preferably PVC or stainless steel.

[0032] Refer to Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6, a pickling acid inlet mechanism 3 is provided at the top of the pickling acid adsorption tank 1. The pickling acid inlet mechanism 3 includes a pulse assembly 301 and a control assembly 302 for driving the pulse assembly 301 to perform pulses in a counterclockwise rotation in cooperation with the two-way boosting mechanism 2 during the adsorption stage to allow the waste acid to enter. The pulse assembly 301 includes a pickling acid inlet cylinder 3011 fixedly installed at the top of the pickling acid adsorption tank 1 and a return spring 3012 fixedly installed on the inner wall of the top of the pickling acid inlet cylinder 3011. The bottom end of the return spring 3012 is fixedly installed with a sealing plate 3013 slidably connected to the inner wall of the pickling acid inlet cylinder 3011. A pickling acid inlet pipe 3015 is fixedly installed on the left side of the pickling acid inlet cylinder 3011. When the return spring 3012 is in a natural extended state, the sealing plate 3013 is located above the connection port of the pickling acid inlet pipe 3015 and the pickling acid inlet cylinder 3011. A slide bar 3014 slidably penetrating the pickling acid inlet cylinder 3011 is fixedly installed on the top of the sealing plate 3013.

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

[0034] During specific use, first inject waste acid into the pickling acid adsorption tank 1 through the pickling acid inlet pipe 3015. At the same time, the temperature sensor monitors the temperature inside the pickling acid 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, and conveys the heat medium generated by the external heat source to the heat preservation interlayer of the pickling acid adsorption tank 1 through the heating coil 10. The heat medium flows in the heating coil 10 and transfers heat to the waste acid and the resin layer inside the pickling acid adsorption tank 1 through heat conduction, so that the temperature gradually rises and stabilizes within the set range.

[0035] Refer to Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6, the control component 302 includes a fixed sleeve 3027 fixedly installed on the top of the adsorption tank 1 and rotatably sleeved outside the drive shaft 201. A rotating disk 3021 is rotatably installed on the top of the fixed sleeve 3027. Two pressing plates 3022 are fixedly installed on the top of the rotating disk 3021 and are symmetrically arranged in a 180° rotation around the center of the rotating disk 3021. One side of the pressing plate 3022 is provided with a slope. The top end of the sliding rod 3014 is fixedly installed with a moving plate 3023. The bottom of the moving plate 3023 is fixedly installed with a pressure-receiving rod 3024 that cooperates with the slope of the pressing plate 3022. When the rotating disk 3021 rotates, it drives the slope of the pressing plate 3022 to press and lift the sliding rod 3014, and the return spring 3012 is compressed and contracted. Then, through the moving plate 3023 and the sliding rod 3014, the sealing plate 3013 rises to pump the waste acid in the acid inlet cylinder 3011, reducing the acid inlet pressure. When the pressure-receiving rod 3024 disengages from the pressing plate 3022, the resilience of the return spring 3012 drives the sealing plate 3013 to reset and push the waste acid, instantaneously increasing the acid inlet pressure.

[0036] It should be noted that both the rotating disk 3021 and the drive shaft 201 are connected to the fixed sleeve 3027 through bearings.

[0037] Refer to Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7 , the control component 302 further includes a ratchet 3025 fixedly sleeved outside the drive shaft 201 and located on the top of the rotating disk 3021. Two ratchet pawls 3026 are rotatably installed on the top of the rotating disk 3021 and are symmetrically arranged in a 180° rotation around the center of the rotating disk 3021. A torsion spring (not shown in the figure) is provided between the ratchet pawl 3026 and the rotating disk 3021. Through the torsion spring, the ratchet pawl 3026 is pressed against the ratchet 3025. When the drive shaft 201 rotates counterclockwise, it will drive the ratchet 3025 to push the ratchet pawl 3026, thereby driving the rotating disk 3021 to rotate. When the drive shaft 201 drives the ratchet 3025 to rotate clockwise, the ratchet pawl 3026 slides on the tooth back of the ratchet 3025, and at this time, the ratchet pawl 3026 does not engage with the teeth of the ratchet 3025.

[0038] During specific use, when the driving motor 6 controls the driving shaft 201 to rotate counterclockwise during the injection of waste acid, the driving shaft 201 drives the ratchet wheel 3025 to rotate. The ratchet wheel 3025 pushes the pawl 3026, thereby driving the rotating disk 3021 to rotate. The rotating disk 3021 drives the two pressing plates 3022 to rotate accordingly. When the pressing plate 3022 rotates to the point where its slope contacts the pressure-receiving rod 3024, as the rotating disk 3021 continues to rotate, the slope of the pressing plate 3022 gradually presses the pressure-receiving rod 3024 to move it upward. The pressure-receiving rod 3024 drives the moving plate 3023 to move upward, so that the sliding rod 3014 drives the sealing plate 3013 to rise synchronously and compress the return spring 3012. During the upward movement of the sealing plate 3013, the internal space of the acid inlet cylinder 3011 increases, and the resistance to the inflow of waste acid into the acid inlet cylinder 3011 decreases. According to the principle 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-receiving rod 3024 disengages from the pressing plate 3022, the return spring 3012 releases its elastic potential energy, driving the sealing plate 3013 to quickly reset downward. During the reset process of the sealing plate 3013, the internal space of the acid inlet cylinder 3011 suddenly decreases, and the resistance to the outflow of waste acid from the acid inlet cylinder 3011 increases. The flow rate of the waste acid in the acid inlet pipe 3015 is hindered in a short period of time. According to Bernoulli's equation, when the flow rate decreases, the pressure increases, so that the inlet acid pressure increases instantaneously, quickly pressing the waste acid in the acid inlet cylinder 3011 into the adsorption tank 1 to achieve pulsed acid inlet. The pulsed acid inlet makes the inlet acid pressure show periodic changes. The formed pulsed water flow can effectively break the fluid boundary layer in the resin layer. At the moment when the pressure increases, the waste acid rushes into the resin layer at a high speed, accelerating the diffusion rate of ions in the waste acid to the resin surface and 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 pulsed water flow generates intermittent impacts on the resin layer, which can prevent the resin particles from being gradually compacted due to the action of the water flow in a single direction for a long time. This intermittent impact makes the resin particles in a continuous micro-perturbation state, maintaining the good pore structure and permeability of the resin layer and reducing the problems of decreased filtration performance caused by resin compaction and the need for frequent backwashing.

[0040] Refer to 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 5, the recoil part 4 includes a sealing cover 403 fixedly installed between the front and rear inner walls of the motor frame 5 and rotatably sleeved outside the drive 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 communicated with 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.

[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 - 1.5 MPa. If the water pressure is too low, it is difficult to generate sufficient impact force to effectively wash down the impurities adsorbed in the resin layer, resulting in incomplete recoil and affecting the filtration and purification effect.

[0046] Refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , a plurality of water spray pipes 402 communicated with the internal flow channel of the drive shaft 201 are fixedly installed on the outside of the drive shaft 201. The plurality of water spray pipes 402 are all located in the pitch interval space of the spiral plate 202 and are evenly distributed in a vertically staggered manner. When the drive shaft 201 rotates, it will drive the water spray pipes 402 to rotate synchronously to stir the resin layer. During the adsorption stage, the stirring of the water spray pipes 402 can assist in improving the adsorption efficiency. During the backwashing stage, the rotational stirring of the water spray pipes 402 can achieve dead - angle - free backwashing, thereby assisting in improving the backwashing efficiency.

[0047] It should be noted that the material of the water spray pipe 402 is corrosion - resistant stainless steel, the pipe diameter is preferably 15 - 25 mm, and the spray nozzle of the water spray pipe 402 is conical to ensure that water can be evenly sprayed on the resin layer during backwashing to achieve dead - angle - free backwashing.

[0048] During specific use, in the backwashing stage, external high-pressure water flows into the sealing cover 403 through the water inlet pipe 401, enters the internal flow channel of the drive shaft 201 through a number of water inlet holes 404 opened on the outer side of the drive shaft 201, and finally sprays out through the water spray pipe 402 to backwash the resin layer. At the same time, the drive motor 6 changes its rotation 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. At this time, the pawl 3026 slides on the tooth back of the ratchet 3025, and the pawl 3026 does not engage with the 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, it can also evenly spray the high-pressure water on the resin layer to achieve 360° dead-angle-free backwashing. The spiral plate 202 rotates clockwise to turn the resin layer from bottom to top. On the one hand, this turning breaks the compacted state formed by the resin layer in the adsorption stage, increases the gaps between resin particles, facilitates the penetration of high-pressure water and the discharge of impurities. On the other hand, the turning of the spiral plate 202 drives the clear water to flow upward, accelerating the backwashing speed of the resin layer. Driven by the spiral plate 202, the clear water forms a convection with the high-pressure water sprayed out by the water spray pipe 402, further enhancing the flushing effect on the resin layer and washing down the impurities adsorbed in the resin layer. During the backwashing process, the wastewater is continuously discharged through the drain pipe 9.

[0049] Finally, it should be noted that: Obviously, the above embodiments are merely examples for clearly illustrating the present invention and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or modifications derived therefrom still fall within the protection scope 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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