Neutralization treatment device and method for pickling wastewater of galvanized sheet production line

Abstract

The invention relates to the technical field of pickling wastewater neutralization treatment, in particular to a galvanized sheet production line pickling wastewater neutralization treatment device and method, the galvanized sheet production line pickling wastewater neutralization treatment device comprises a base, a neutralization barrel is fixedly mounted on the upper side of the base, a support is fixedly mounted on the upper side of the neutralization barrel, and a material guide assembly is fixedly mounted on the upper side of the support; acid waste liquid is injected into a primary filter pipe through a pressure pump, the primary filter pipe filters the acid liquid, the filtered acid liquid passes through a water wheel and drives the water wheel to rotate, the water wheel rotates to drive a transmission rod to rotate, the transmission rod drives a driving lead screw to rotate, the driving lead screw drives a driving pipe to move, and the driving pipe drives a liquid suction piston to move. The liquid suction piston is gradually far away from the neutralizing liquid pipe, at the moment, external alkaline neutralizing liquid is sucked into the neutralizing liquid pipe according to a certain proportion through the second-stage one-way valve, automatic quantitative proportioning of the alkaline neutralizing liquid is completed, manual proportioning is avoided, and the treatment efficiency of the device is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of acid pickling wastewater neutralization treatment, and specifically to an acid pickling wastewater neutralization treatment device and method for a galvanized sheet production line. Background Art

[0002] Pickling of galvanized sheets is an important process in the production of galvanized steel sheets, usually used to remove surface rust, oxide layers, and other impurities. Acid waste liquid is generated during the pickling process, and the acid waste liquid is somewhat polluting to the environment. Therefore, it needs to be neutralized, and a neutralization treatment device is required for the neutralization treatment.

[0003] Chinese invention patent CN118561443A discloses a neutralization precipitation separation device for fluorotantalate production wastewater and its use method, including: a wastewater storage tank, on the side wall of which a plurality of filter holes are arranged at equal circumferential intervals, and the filter holes are communicated with a diversion member installed outside the wastewater storage tank; a stirring plate arranged inside the wastewater storage tank; a rotating assembly connected to the stirring plate, and the rotating assembly can drive the stirring plate to perform a circular motion inside the wastewater storage tank; a lifting assembly linked to the rotating assembly, and the lifting assembly can drive the stirring plate to reciprocate in the vertical direction of space when the rotating assembly drives the stirring plate to perform a circular motion; an elastic switching assembly connected to the rotating assembly and the stirring plate, and the elastic switching assembly can trigger the deflection of the stirring plate when the stirring plate moves to the end of the stroke in the vertical direction of space, making it inclined or vertical to improve the mixing and separation effect.

[0004] However, this device still has problems. When the device neutralizes the wastewater, it directly adopts "pouring the wastewater to be treated into the wastewater storage tank and adding lime slurry into the wastewater storage tank at the same time". When the amount of lime slurry is added manually, quantitative proportioning is required. In this device, due to the need for manual quantitative proportioning of the amount of lime slurry, this process increases the complexity and workload of manual operation, resulting in a decrease in the neutralization treatment efficiency. Summary of the Invention

[0005] The purpose of the present invention is to provide an acid pickling wastewater neutralization treatment device and method for a galvanized sheet production line to solve the problems raised in the above background art.

[0006] The technical solution of the present invention is: an acid pickling wastewater neutralization treatment device for a galvanized sheet production line, including a base, on the upper side of which a neutralization barrel is fixedly installed, on the upper side of the neutralization barrel a bracket is fixedly installed, and on the upper side of the bracket a feeding component is fixedly installed; The material guiding assembly includes a metering pipe, which is fixedly installed on a bracket. A water wheel is rotatably installed on the inner wall of the metering pipe through a rotating shaft. A guiding plate is fixedly installed on the inner wall of the metering pipe. An annular groove for facilitating the installation of the water wheel is formed on one side of the guiding plate. A filtering unit is fixedly installed on the upper side of the metering pipe. A neutralizing liquid pipe is fixedly installed on the upper side of the bracket. A liquid suction piston is slidably installed in the inner wall of the neutralizing liquid pipe. A first one-way valve is fixedly installed on one side of the liquid suction piston. One end of the first one-way valve is fixedly installed with a spraying unit. A second one-way valve is fixedly installed on one side of the liquid suction piston. One end of the liquid suction piston is fixedly installed with a driving pipe. One end of the rotating shaft is fixedly installed with a transmission rod. One end of the transmission rod is fixedly installed with a driving lead screw. The surface of the driving lead screw is screwed and installed in the inner wall of the driving pipe. A pneumatic assembly is fixedly installed on the upper side of the bracket.

[0007] Preferably, the pneumatic assembly includes an air extraction pipe, which is fixedly installed on the upper side of the bracket. An air injection piston is slidably installed in the inner wall of the air extraction pipe. A driving unit is fixedly installed on one side of the air injection piston. A second air delivery pipe is fixedly installed on one side of the air extraction pipe and extends to the inside of the air extraction pipe. A one-way suction nozzle is fixedly installed on one side of the air extraction pipe. The other end of the second air delivery pipe is fixedly installed with a pressure relief valve. The other end of the pressure relief valve is fixedly installed with a first air delivery pipe. The other end of the first air delivery pipe is fixedly installed on one side of the neutralizing liquid pipe and extends to the inside. An air pushing piston is slidably installed in the inner wall of the neutralizing liquid pipe. An air injection disc is fixedly installed in the inner wall of the neutralizing barrel.

[0008] Preferably, the spraying unit includes a hose, which is fixedly installed on one end of the first one-way valve. An L-shaped pipe is fixedly installed on the upper side of the bracket. The other end of the hose is fixedly connected to one end of the L-shaped pipe. A rotating hole is formed on the upper side of the bracket. A neutralizing pipe is rotatably installed in the rotating hole. The top end of the neutralizing pipe is rotatably connected to the other end of the L-shaped pipe. A liquid distribution pipe is fixedly installed on the lower side of the neutralizing pipe. A plurality of liquid spraying nozzles are fixedly installed on the lower side of the liquid distribution pipe.

[0009] Preferably, the driving unit includes a push rod, one end of which is fixedly installed on one side of the air injection piston. The other end of the push rod is fixedly installed with a reciprocating block. A limiting block is fixedly installed on the lower side of the reciprocating block. The limiting block is slidably installed on the upper side of the bracket.

[0010] Preferably, the driving unit further includes a driving gear, which is fixedly installed on the surface of the neutralizing pipe. A transmission gear is rotatably installed on the upper side of the bracket. The driving gear meshes with the transmission gear. A driving block is fixedly installed on the upper side of the transmission gear. A reciprocating opening is formed on the upper side of the reciprocating block. The driving block fits on the inner wall of the reciprocating opening.

[0011] Preferably, the gas injection disc includes an outer ring pipe fixedly installed on the inner wall of the neutralization barrel. An inner ring pipe is installed in the inner ring area of the outer ring pipe and is communicated with it. One-way air nozzles are installed on both the upper sides of the outer ring pipe and the inner ring pipe. A partition is fixedly installed on the inner wall of the neutralization barrel. The one-way air nozzles are fixedly installed on the partition and extend to the upper side of the partition. A pressure relief gas transmission pipe is fixedly installed on the lower side of the outer ring pipe. The other end of the pressure relief gas transmission pipe is fixedly connected to the pressure relief port of the pressure relief valve.

[0012] Preferably, the filtering assembly includes a primary filtering pipe fixedly installed at the top of the metering pipe. A large particle filtering plate is slidably installed on the inner wall of the primary filtering pipe, and a small particle filtering plate is slidably installed on the inner wall of the primary filtering pipe. A waste liquid external interface is provided on the upper side of the primary filtering pipe.

[0013] Preferably, a stirring rod is rotatably installed on the upper side of the partition and extends to the lower side of the partition. The top of the stirring rod is fixedly connected to the lower side of the liquid distribution pipe. A driving motor is installed on the base. The output end of the driving motor is fixedly connected to the bottom end of the stirring rod.

[0014] Preferably, a plurality of filtering holes are formed on the surface of the neutralization barrel, and a plurality of sealing doors for sealing the filtering holes are rotatably installed on the surface of the neutralization barrel.

[0015] The method for neutralizing and treating pickling wastewater in a galvanized sheet production line includes the following steps: S1. First, externally connect a secondary one-way valve to the neutralizing liquid, and then externally connect the waste liquid external interface to the acidic waste liquid. Inject the acidic waste liquid into the primary filtering pipe through a pressure pump. Filter the acidic liquid through the primary filtering pipe. The filtered acidic liquid passes through a water wheel and drives the water wheel to rotate. The water wheel drives a driving screw rod to rotate through a transmission rod. The driving screw rod drives a driving pipe to move, so that the liquid suction piston gradually moves away from the neutralizing liquid pipe and sucks a certain proportion of the neutralizing liquid into the neutralizing liquid pipe. S2. During neutralization, first start the driving motor. Drive the stirring rod to rotate through the output end of the driving motor to stir and neutralize the mixed solution. At the same time, the stirring rod drives the spraying unit to rotate. The spraying unit drives the driving unit. The driving unit drives the injection piston to reciprocate in the air extraction pipe, inhales the external gas through the one-way suction nozzle, and injects it into the neutralizing liquid pipe through the secondary gas transmission pipe and the primary gas transmission pipe to push the air push piston, evenly extrude the inhaled neutralizing liquid and transport it to the spraying assembly to evenly spray the neutralizing liquid. And when the neutralizing liquid is completely injected, discharge the excess gas through the pressure relief valve through the pressure relief gas transmission pipe into the inner ring pipe, and inject gas into the neutralization barrel through the inner ring pipe to generate bubbles, improving the mixing and neutralization efficiency. S3. After neutralization is completed, turn off the drive motor, place the collection dish at the sealing door, open the sealing door, drain the neutralized waste liquid through the filter holes, and take out the filter residue from the neutralization barrel, the large-particle filter screen and the small-particle filter screen for complete neutralization treatment.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The pressure pump injects the acidic waste liquid into the primary filter tube, filters the acidic liquid through the primary filter tube, the filtered acidic liquid passes through the water wheel and drives the water wheel to rotate, the rotation of the water wheel drives the transmission rod to rotate, the transmission rod drives the driving lead screw to rotate, the driving lead screw drives the driving tube to move, the driving tube drives the liquid suction piston to move, so that the liquid suction piston gradually moves away from the neutralization liquid tube. At this time, the external alkaline neutralization liquid is sucked into the neutralization liquid tube in a certain proportion through the secondary one-way valve, completing the automatic quantitative ratio of the alkaline neutralization liquid, avoiding manual ratio, and improving the processing efficiency of the device.

[0017] 2. The output end of the drive motor drives the stirring rod to rotate, the stirring rod drives the liquid distribution tube to rotate, the liquid distribution tube drives the neutralization tube to rotate, the neutralization tube drives the driving gear to rotate, the driving gear drives the transmission gear to rotate, the transmission gear drives the driving block to rotate, the driving block drives the reciprocating block to reciprocate under the limiting action of the limiting block, the reciprocating block drives the push rod to move, the push rod drives the air injection piston to reciprocate. When the air injection piston moves, it sucks the external gas into the air extraction tube through the one-way suction nozzle, and then through the secondary air pipe and the pressure relief valve to the primary air pipe, and injects it into the neutralization liquid tube. After the neutralization liquid tube is injected with gas, pressure is generated and the air push piston is pushed to move. The air push piston squeezes the area containing the alkaline neutralization liquid, so that the alkaline neutralization liquid is discharged through the hose and transported to the neutralization tube through the L-shaped tube, and then transported to the liquid distribution tube through the neutralization tube and evenly sprayed into the acidic waste liquid through the spray nozzles installed on the lower side for mixing, and the stirring rod stirs and neutralizes the mixed solution. The segmented addition of the alkaline neutralization liquid is adopted to prevent excessive addition, which may cause local overheating of the mixed liquid, resulting in liquid splashing and operational risks.

[0018] 3. When the segmented injection of the alkaline neutralization liquid is completed, the gas in the air extraction tube cannot be injected continuously, so that the pressure of the pressure relief valve continues to increase. When the threshold is reached, the pressure relief valve starts to relieve pressure, and the discharged gas enters the pressure relief air pipe through the pressure relief port and is transported to the outer ring pipe and the inner ring pipe, and is discharged into the neutralization barrel through multiple one-way air nozzles, generating bubbles in the neutralization barrel, generating turbulent flow to assist the mixed liquid for full mixing, preventing local pH deviation, and improving the neutralization efficiency. Description of the Drawings

[0019] The following further explains the present invention in conjunction with the drawings and embodiments: Figure 1 It is the overall structural schematic diagram of the present invention; Figure 2 is the overall sectional structure diagram of the present invention; Figure 3 Figure 2 is the enlarged structure diagram of area A therein; Figure 4 is the structure diagram of the gas injection disc and its related structures in the present invention; Figure 5 is the sectional structure diagram of the material guiding component of the present invention; Figure 6 is the structure diagram of the pneumatic component of the present invention; Figure 7 is Figure 6 is the enlarged structure diagram of area B therein; Figure 8 is the structure diagram of the drive unit of the present invention.

[0020] Explanation of reference numerals: 1, base; 2, sealing door; 3, neutralization barrel; 4, metering tube; 5, neutralizing liquid tube; 6, drive motor; 7, gas injection disc; 71, inner ring pipe; 72, one-way air nozzle; 73, outer ring pipe; 8, partition board; 9, filtering hole; 10, stirring rod; 11, bracket; 12, pressure relief gas transmission pipe; 13, waste liquid external interface; 14, primary gas transmission pipe; 15, pressure relief valve; 16, suction pipe; 17, transmission rod; 18, water wheel; 19, primary filter pipe; 20, small particle filter plate; 21, large particle filter plate; 22, guiding plate; 23, annular groove; 24, gas push piston; 25, liquid suction piston; 26, drive screw rod; 27, drive pipe; 28, liquid distribution pipe; 29, liquid spraying nozzle; 30, transmission gear; 31, primary one-way valve; 32, secondary one-way valve; 33, secondary gas transmission pipe; 34, gas injection piston; 35, one-way suction nozzle; 36, neutralizing pipe; 37, drive gear; 38, limit block; 39, reciprocating block; 40, push rod; 41, hose; 42, L-shaped pipe; 43, drive block. Detailed implementation manners

[0021] The present invention will be further described below in conjunction with specific embodiments. However, those skilled in the art should understand that the detailed description given here with reference to the drawings is for better explanation. The structure of the present invention necessarily goes beyond these limited embodiments, and for some equivalent replacement schemes or common means, no detailed description will be given herein, but they still fall within the protection scope of the present application.

[0022] Figures 1 to 8 is the best embodiment of the present invention. The present invention will be further described below in conjunction with the attached Figures 1 to 8 drawings.

[0023] Such as Figures 1 to 8As shown, a neutralization treatment device and method for pickling wastewater in a galvanized sheet production line, including a base 1, a neutralization tank 3 is fixedly installed on the upper side of the base 1, a support 11 is fixedly installed on the upper side of the neutralization tank 3, and a material guiding component is fixedly installed on the upper side of the support 11; The material guiding component includes a metering pipe 4, the metering pipe 4 is fixedly installed on the support 11, a water wheel 18 is rotatably installed on the inner wall of the metering pipe 4 through a rotating shaft, a guiding plate 22 is fixedly installed on the inner wall of the metering pipe 4, an annular groove 23 convenient for installing the water wheel 18 is opened on one side of the guiding plate 22, a filtering unit is fixedly installed on the upper side of the metering pipe 4, a neutralizing liquid pipe 5 is fixedly installed on the upper side of the support 11, a liquid suction piston 25 is slidably installed on the inner wall of the neutralizing liquid pipe 5, a first one-way valve 31 is fixedly installed on one side of the liquid suction piston 25, one end of the first one-way valve 31 is fixedly installed with a spraying unit, a second one-way valve 32 is fixedly installed on one side of the liquid suction piston 25, one end of the liquid suction piston 25 is fixedly installed with a driving pipe 27, one end of the rotating shaft is fixedly installed with a transmission rod 17, one end of the transmission rod 17 is fixedly installed with a driving lead screw 26, and the surface of the driving lead screw 26 is screwed on the inner wall of the driving pipe 27. An air-actuated component is fixedly installed on the upper side of the support 11.

[0024] With the above structure, the metering pipe 4 installed on the upper side of the neutralization tank 3 through the support 11 is rectangular, the upper side of the guiding plate 22 inside it is an inclined surface, and there is a certain gap between one side and one side of the metering pipe 4, which can guide the flow direction of the incoming wastewater. The annular groove 23 opened on one side is convenient for installing the water wheel 18. When the wastewater with a certain flow rate passes through this gap, it drives the water wheel 18 to rotate in a specific direction. The driving force drives the driving lead screw 26 to rotate through the transmission rod 17. The driving lead screw 26 will drive the driving pipe 27 to contract on the surface of the driving lead screw 26, thereby driving the liquid suction piston 25 away from the neutralizing liquid pipe 5. At this time, the direction of the second one-way valve 32 is from the outside to the inside of the neutralizing liquid pipe 5, and the direction of the first one-way valve 31 is from the neutralizing liquid pipe 5 to the spraying unit. Through the negative pressure generated in the neutralizing liquid pipe 5, the synchronous neutralizing liquid is sucked in. Since the amount of acidic wastewater passing through the metering pipe 4 is certain, the alkaline neutralizing liquid sucked into the neutralizing liquid pipe 5 can be automatically proportioned in a predetermined ratio, thus completing the automatic proportioning of the alkaline neutralizing liquid.

[0025] Further, the pneumatic component includes an air extraction pipe 16. The air extraction pipe 16 is fixedly installed on the upper side of the bracket 11. An air injection piston 34 is slidably installed on the inner wall of the air extraction pipe 16. A driving unit is fixedly installed on one side of the air injection piston 34. A secondary air delivery pipe 33 is fixedly installed on one side of the air extraction pipe 16 and extends into the air extraction pipe 16. A one-way suction nozzle 35 is fixedly installed on one side of the air extraction pipe 16. The other end of the secondary air delivery pipe 33 is fixedly installed with a pressure relief valve 15. The other end of the pressure relief valve 15 is fixedly installed with a primary air delivery pipe 14. The other end of the primary air delivery pipe 14 is fixedly installed on one side of the neutralizing liquid pipe 5 and extends into the interior. An air-pushing piston 24 is slidably installed on the inner wall of the neutralizing liquid pipe 5. An air injection disc 7 is fixedly installed on the inner wall of the neutralizing barrel 3.

[0026] With the above structure, one end of the primary air delivery pipe 14 is installed at the opposite end of the liquid suction piston 25, and the other end is connected to the secondary air delivery pipe 33 through the pressure relief valve 15. The other end of the secondary air delivery pipe 33 is connected to the air extraction pipe 16. A one-way valve is installed on the secondary air delivery pipe 33, and the direction of the one-way valve is from the air extraction pipe 16 to the pressure relief valve 15. A one-way suction nozzle 35 is also installed on one side of the air extraction pipe 16 close to the secondary air delivery pipe 33, and its direction is from the outside to the inside of the air extraction pipe 16. The air-pushing piston 24 and the liquid suction piston 25 have the same size. When the air injection piston 34 inside the air extraction pipe 16 is driven by the driving unit, the one-way suction nozzle 35 sucks the outside air into the air extraction pipe 16 and delivers it to the primary air delivery pipe 14 through the pressure relief valve 15 via the secondary air delivery pipe 33, and injects it into the neutralizing liquid pipe 5. After the neutralizing liquid pipe 5 is injected with gas, pressure is generated and the air-pushing piston 24 is pushed to move, squeezing out the alkaline neutralizing liquid.

[0027] Further, the spraying unit includes a hose 41. The hose 41 is fixedly installed at one end of the one-way valve 31. An L-shaped pipe 42 is fixedly installed on the upper side of the bracket 11. The other end of the hose 41 is fixedly connected to one end of the L-shaped pipe 42. A rotating hole is opened on the upper side of the bracket 11. A neutralizing pipe 36 is rotatably installed in the rotating hole. The top end of the neutralizing pipe 36 is rotatably connected to the other end of the L-shaped pipe 42. A liquid distribution pipe 28 is fixedly installed on the lower side of the neutralizing pipe 36. A plurality of liquid spraying nozzles 29 are fixedly installed on the lower side of the liquid distribution pipe 28.

[0028] With the above structure, the direction of the one-way valve 31 is from the neutralizing liquid pipe 5 to the hose 41. The L-shaped pipe 42 installed at the other end of the hose 41 is a rigid pipe and is fixedly installed on the upper side of the bracket 11 through a fixing bracket. The other end of the L-shaped pipe 42 fits on the inner wall of the neutralizing pipe 36 and is rotatably installed and communicated with it. Equal-spacing liquid spraying nozzles 29 are installed on the lower side of the liquid distribution pipe 28 installed at the bottom end of the neutralizing pipe 36, and the number of them can be increased or decreased according to the actual situation.

[0029] Further, the driving unit includes a push rod 40. One end of the push rod 40 is fixedly installed on one side of the air injection piston 34. A reciprocating block 39 is fixedly installed at the other end of the push rod 40. A limiting block 38 is fixedly installed on the lower side of the reciprocating block 39. The limiting block 38 is slidably installed on the upper side of the bracket 11.

[0030] With the above structure, the push rod 40 is L-shaped. The air injection piston 34 is connected to the reciprocating block 39 through the push rod 40. The limiting block 38 installed on the lower side of the reciprocating block 39 is square. A limiting groove is provided on the upper side of the bracket 11 and is slidably connected through the limiting block 38. The reciprocating movement of the reciprocating block 39 drives the push rod 40 to perform a horizontal reciprocating movement, and drives the air injection piston 34 to perform a reciprocating movement in the air extraction pipe 16 for air extraction and delivery. It should be noted that after the gas extraction and delivery are completed, the air injection piston 34 will fit against the inner wall of the air extraction pipe 16 and seal the one-way suction nozzle 35 and the secondary gas transmission pipe 33, so as to maintain the airtightness during the inhalation of the alkaline neutralizing solution, facilitating its smooth ratio preparation.

[0031] Further, the driving unit further includes a driving gear 37. The driving gear 37 is fixedly installed on the surface of the neutralization pipe 36. A transmission gear 30 is rotatably installed on the upper side of the bracket 11. The driving gear 37 meshes with the transmission gear 30. A driving block 43 is fixedly installed on the upper side of the transmission gear 30. A reciprocating opening is provided on the upper side of the reciprocating block 39. The driving block 43 fits against the inner wall of the reciprocating opening.

[0032] With the above structure, the size of the driving gear 37 is smaller than that of the transmission gear 30. The driving block 43 is cylindrical. The diameter of the reciprocating opening provided on the reciprocating block 39 is larger than the diameter of the circular movement track of the driving block 43. The driving gear 37 drives the transmission gear 30 to rotate. The transmission gear 30 drives the driving block 43 installed on the upper side to rotate. The driving block 43 drives the reciprocating block 39 to perform a reciprocating movement through the reciprocating opening to provide driving force.

[0033] Further, the air injection disc 7 includes an outer ring pipe 73. The outer ring pipe 73 is fixedly installed on the inner wall of the neutralization barrel 3. An inner ring pipe 71 is installed in the inner ring area of the outer ring pipe 73 and is connected to it. One-way air nozzles 72 are installed on the upper sides of both the outer ring pipe 73 and the inner ring pipe 71. A partition 8 is fixedly installed on the inner wall of the neutralization barrel 3. The one-way air nozzles 72 are fixedly installed on the partition 8 and extend to the upper side of the partition 8. A pressure relief gas transmission pipe 12 is fixedly installed on the lower side of the outer ring pipe 73. The other end of the pressure relief gas transmission pipe 12 is fixedly connected to the pressure relief port of the pressure relief valve 15.

[0034] With the above structure, annular one-way nozzles 72 with equal intervals are installed on the upper sides of the outer ring pipe 73 and the inner ring pipe 71, and their directions are from bottom to top. The outer ring pipe 73 and the inner ring pipe 71 are connected through a rigid pipe. The lower side of the outer ring pipe 73 is installed at the pressure relief port position of the pressure relief valve 15 through the pressure relief gas transmission pipe 12. By injecting the gas discharged from the pressure relief valve 15 into the outer ring pipe 73 and injecting it into the neutralization tank 3 through the one-way nozzles 72 installed on the upper sides of the outer ring pipe 73 and the inner ring pipe 71, bubbles are generated to improve the mixing effect.

[0035] Furthermore, the filtering component includes a primary filtering pipe 19, which is fixedly installed at the top of the metering pipe 4. A large particle filtering plate 21 is slidably installed on the inner wall of the primary filtering pipe 19, and a small particle filtering plate 20 is slidably installed on the inner wall of the primary filtering pipe 19. A waste liquid external interface 13 is arranged on the upper side of the primary filtering pipe 19.

[0036] With the above structure, two sliding openings are formed on one side of the primary filtering pipe 19, and the small particle filtering plate 20 and the large particle filtering plate 21 are respectively slidably installed in the two sliding openings. The small particle filtering plate 20 is located below the large particle filtering plate 21, which is convenient for preliminarily filtering solid impurities such as rust in the acidic waste water.

[0037] Furthermore, a stirring rod 10 is rotatably installed on the upper side of the partition plate 8 and extends to the lower side of the partition plate 8. The top end of the stirring rod 10 is fixedly connected to the lower side of the liquid distribution pipe 28. A driving motor 6 is installed on the base 1, and the output end of the driving motor 6 is fixedly connected to the bottom end of the stirring rod 10.

[0038] With the above structure, the driving motor 6 is fixedly installed on one side of the bottom through bolts, and its output end is coaxially fixedly connected to the bottom end of the stirring rod 10. The stirring rod 10 is driven to rotate by the output end of the driving motor 6 to mix the solution.

[0039] Furthermore, a plurality of filtering holes 9 are formed on the surface of the neutralization tank 3, and a plurality of sealing doors 2 for sealing the filtering holes 9 are rotatably installed on the surface of the neutralization tank 3.

[0040] With the above structure, four equally spaced filtering holes 9 are equally spaced on the surface of the neutralization tank 3, which is convenient for filtering the neutralized waste liquid. A sealing door 2 is rotatably installed in the area of each filtering hole 9 through a hinge. The sealing door 2 can be closed to seal the neutralization tank 3 during neutralization, and the sealing door 2 is opened after neutralization to filter the neutralized waste liquid in the neutralization tank 3. Moreover, a cleaning cover is installed on the surface of the neutralization tank 3 through bolts, and the neutralization tank 3 can be cleaned.

[0041] Working principle: When the device is in use, first connect the secondary one-way valve 32 to the external alkaline neutralizing solution, and then connect the acid waste liquid external interface 13 to the acid waste liquid. Inject the acid waste liquid into the primary filter tube 19 through the pressure pump. The primary filter tube 19 filters the acid liquid. The filtered acid liquid passes through the water wheel 18 and drives the water wheel 18 to rotate. The rotation of the water wheel 18 drives the transmission rod 17 to rotate. The transmission rod 17 drives the driving lead screw 26 to rotate. The driving lead screw 26 drives the driving tube 27 to move. The driving tube 27 drives the liquid suction piston 25 to move, so that the liquid suction piston 25 gradually moves away from the neutralizing solution tube 5. At this time, the external alkaline neutralizing solution is inhaled into the neutralizing solution tube 5 through the secondary one-way valve 32 in a certain proportion to complete the quantitative ratio of the alkaline neutralizing solution; Start the driving motor 6. The output end of the driving motor 6 drives the stirring rod 10 to rotate. The stirring rod 10 drives the liquid distribution tube 28 to rotate. The liquid distribution tube 28 drives the neutralizing tube 36 to rotate. The neutralizing tube 36 drives the driving gear 37 to rotate. The driving gear 37 drives the transmission gear 30 to rotate. The transmission gear 30 drives the driving block 43 to rotate. The driving block 43 drives the reciprocating block 39 to perform a reciprocating motion under the limiting action of the limiting block 38. The reciprocating block 39 drives the push rod 40 to move. The push rod 40 drives the gas injection piston 34 to reciprocate. When the gas injection piston 34 moves, it inhales the external gas into the air extraction tube 16 through the one-way suction nozzle 35, and then passes through the secondary air pipe 33 through the pressure relief valve 15 to the primary air pipe 14 and injects it into the neutralizing solution tube 5. After the neutralizing solution tube 5 is injected with gas, it generates pressure and pushes the gas push piston 24 to move. The gas push piston 24 squeezes the area containing the alkaline neutralizing solution, so that the alkaline neutralizing solution is discharged through the hose 41 and is transported to the neutralizing tube 36 through the L-shaped tube 42. It is transported to the liquid distribution tube 28 by the neutralizing tube 36 and is evenly sprayed into the acid waste liquid through the spray nozzle 29 installed on the lower side for mixing, and the stirring rod 10 stirs and neutralizes the mixed solution; When the gas push piston 24 fits on one side of the liquid suction piston 25, that is, when a sufficient amount of alkaline neutralizing solution is completely injected into the acid waste liquid, the gas in the air extraction tube 16 will no longer be able to be injected at this time, causing the pressure of the pressure relief valve 15 to continuously increase. When it reaches the threshold, the pressure relief valve 15 starts to relieve pressure. The discharged gas enters the pressure relief air pipe 12 through the pressure relief port and is transported to the outer ring pipe 73 and the inner ring pipe 71, and is discharged into the neutralizing barrel 3 through multiple one-way air nozzles 72, generating bubbles in the neutralizing barrel 3 to assist the mixed liquid to be fully mixed and improve the neutralization efficiency; After the neutralization is completed, turn off the driving motor 6. Place the collecting dish at the sealing door 2. Open the sealing door 2 to discharge the neutralized waste liquid through the filter holes 9, and take out the filter residue from the neutralizing barrel 3, the large particle filter screen and the small particle filter screen for complete neutralization treatment.

[0042] The present invention also provides a method for neutralizing and treating pickling wastewater in a galvanized sheet production line, including the following steps: S1. First, connect the secondary one-way valve 32 to the neutralizing liquid externally, and then connect the waste liquid external interface 13 to the acidic waste liquid. Inject the acidic waste liquid into the primary filter tube 19 through a pressure pump. Filter the acidic liquid through the primary filter tube 19. The filtered acidic liquid passes through the water wheel 18 and drives the water wheel 18 to rotate. The water wheel 18 drives the driving screw rod 26 to rotate through the transmission rod 17. The driving screw rod 26 drives the driving tube 27 to move, so that the liquid suction piston 25 gradually moves away from the neutralizing liquid tube 5 and sucks a certain proportion of the neutralizing liquid into the neutralizing liquid tube 5; S2. When performing neutralization, first start the driving motor 6. Drive the stirring rod 10 to rotate through the output end of the driving motor 6 to stir and neutralize the mixed solution. At the same time, the stirring rod 10 drives the spraying unit to rotate. The spraying unit drives the driving unit. The driving unit drives the air injection piston 34 to reciprocate in the air extraction tube 16, inhales the external gas through the one-way suction nozzle 35 and injects it into the neutralizing liquid tube 5 through the secondary gas transmission tube 33 and the primary gas transmission tube 14, pushes the air push piston 24, evenly extrudes the inhaled neutralizing liquid and transports it to the spraying assembly to evenly spray the neutralizing liquid. And when the neutralizing liquid is completely injected, discharge the excess gas through the pressure relief valve 15 through the pressure relief gas transmission tube 12 into the inner ring tube 71, inject gas into the neutralizing bucket 3 through the inner ring tube 71 to generate bubbles, and improve the mixing and neutralization efficiency; S3. After neutralization is completed, turn off the driving motor 6. Place the collection dish at the sealing door 2. Open the sealing door 2 to discharge the neutralized waste liquid through the filter holes 9, and take out the filter residue from the neutralizing bucket 3, the large particle filter screen and the small particle filter screen for complete neutralization treatment.

[0043] The above is only a preferred embodiment of the present invention, and it is not a limitation of the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the technical solution content of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. Pickling wastewater neutralization treatment device for galvanized sheet production line, including a base (1), characterized in that: A neutralization barrel (3) is fixedly installed on the upper side of the base (1), a bracket (11) is fixedly installed on the upper side of the neutralization barrel (3), and a material guiding component is fixedly installed on the upper side of the bracket (11). The material guiding component includes a metering pipe (4). The metering pipe (4) is fixedly installed on the bracket (11). A water wheel (18) is rotatably installed on the inner wall of the metering pipe (4) through a rotating shaft. A guiding plate (22) is fixedly installed on the inner wall of the metering pipe (4). An annular groove (23) facilitating the installation of the water wheel (18) is formed on one side of the guiding plate (22). A filtering unit is fixedly installed on the upper side of the metering pipe (4). A neutralization liquid pipe (5) is fixedly installed on the upper side of the bracket (11). A liquid suction piston (25) is slidably installed on the inner wall of the neutralization liquid pipe (5). A first one-way valve (31) is fixedly installed on one side of the liquid suction piston (25). A spraying unit is fixedly installed at one end of the first one-way valve (31). A second one-way valve (32) is fixedly installed on one side of the liquid suction piston (25). A driving pipe (27) is fixedly installed at one end of the liquid suction piston (25). One end of the rotating shaft is fixedly installed with a transmission rod (17). One end of the transmission rod (17) is fixedly installed with a driving lead screw (26). The surface of the driving lead screw (26) is screwed and installed on the inner wall of the driving pipe (27). An air-powered component is fixedly installed on the upper side of the bracket (11).

2. The pickling wastewater neutralization treatment device for a galvanized sheet production line according to claim 1, wherein: The air-powered component includes an air extraction pipe (16). The air extraction pipe (16) is fixedly installed on the upper side of the bracket (11). An air injection piston (34) is slidably installed on the inner wall of the air extraction pipe (16). A driving unit is fixedly installed on one side of the air injection piston (34). A second air delivery pipe (33) is fixedly installed on one side of the air extraction pipe (16) and extends into the air extraction pipe (16). A one-way suction nozzle (35) is fixedly installed on one side of the air extraction pipe (16). The other end of the second air delivery pipe (33) is fixedly installed with a pressure relief valve (15). The other end of the pressure relief valve (15) is fixedly installed with a first air delivery pipe (14). The other end of the first air delivery pipe (14) is fixedly installed on one side of the neutralization liquid pipe (5) and extends into it. An air-pushing piston (24) is slidably installed on the inner wall of the neutralization liquid pipe (5). An air injection disc (7) is fixedly installed on the inner wall of the neutralization barrel (3).

3. The pickling wastewater neutralization treatment device for a galvanized sheet production line according to claim 2, characterized in that: The spraying unit includes a hose (41). The hose (41) is fixedly installed at one end of the first one-way valve (31). An L-shaped pipe (42) is fixedly installed on the upper side of the bracket (11). The other end of the hose (41) is fixedly connected to one end of the L-shaped pipe (42). A rotating hole is formed on the upper side of the bracket (11). A neutralization pipe (36) is rotatably installed in the rotating hole. The top end of the neutralization pipe (36) is rotatably connected to the other end of the L-shaped pipe (42). A liquid distribution pipe (28) is fixedly installed on the lower side of the neutralization pipe (36). A plurality of liquid spraying nozzles (29) are fixedly installed on the lower side of the liquid distribution pipe (28).

4. The pickling wastewater neutralization treatment device for a galvanized sheet production line according to claim 3, characterized in that: The driving unit includes a push rod (40). One end of the push rod (40) is fixedly installed on one side of the gas injection piston (34). The other end of the push rod (40) is fixedly installed with a reciprocating block (39). A limiting block (38) is fixedly installed on the lower side of the reciprocating block (39). The limiting block (38) is slidably installed on the upper side of the bracket (11).

5. The pickling wastewater neutralization treatment device for a galvanized sheet production line according to claim 4, characterized in that: The driving unit further includes a driving gear (37). The driving gear (37) is fixedly installed on the surface of the neutralizing pipe (36). A transmission gear (30) is rotatably installed on the upper side of the bracket (11). The driving gear (37) meshes with the transmission gear (30). A driving block (43) is fixedly installed on the upper side of the transmission gear (30). A reciprocating opening is formed on the upper side of the reciprocating block (39). The driving block (43) is attached to the inner wall of the reciprocating opening.

6. The pickling wastewater neutralization treatment device for a galvanized sheet production line according to claim 3, wherein: The gas injection disc (7) includes an outer ring pipe (73). The outer ring pipe (73) is fixedly installed on the inner wall of the neutralizing barrel (3). An inner ring pipe (71) is installed in the inner ring area of the outer ring pipe (73) and is communicated with it. Check valves (72) are installed on the upper sides of both the outer ring pipe (73) and the inner ring pipe (71). A partition plate (8) is fixedly installed on the inner wall of the neutralizing barrel (3). The check valves (72) are fixedly installed on the partition plate (8) and extend to the upper side of the partition plate (8). A pressure relief gas transmission pipe (12) is fixedly installed on the lower side of the outer ring pipe (73). The other end of the pressure relief gas transmission pipe (12) is fixedly connected to the pressure relief port of the pressure relief valve (15).

7. The pickling wastewater neutralization treatment device for a galvanized sheet production line according to claim 1, characterized in that: The filtering assembly includes a primary filter pipe (19). The primary filter pipe (19) is fixedly installed at the top of the metering pipe (4). A large particle filter plate (21) is slidably installed on the inner wall of the primary filter pipe (19). A small particle filter plate (20) is slidably installed on the inner wall of the primary filter pipe (19). A waste liquid external interface (13) is provided on the upper side of the primary filter pipe (19).

8. The pickling wastewater neutralization treatment device for a galvanized sheet production line according to claim 6, characterized in that: A stirring rod (10) is rotatably installed on the partition plate (8) and extends to the lower side of the partition plate (8). The top of the stirring rod (10) is fixedly connected to the lower side of the liquid distribution pipe (28). A driving motor (6) is installed on the base (1). The output end of the driving motor (6) is fixedly connected to the bottom end of the stirring rod (10).

9. The pickling wastewater neutralization treatment device for a galvanized sheet production line according to claim 1, characterized in that: A plurality of filter holes (9) are formed on the surface of the neutralizing barrel (3). A plurality of sealing doors (2) for sealing the filter holes (9) are rotatably installed on the surface of the neutralizing barrel (3).

10. A method for neutralizing and treating pickling wastewater in a galvanized sheet production line according to any one of claims 1-9, characterized in that: It includes the following steps: S1. First, connect the secondary check valve (32) to the neutralizing liquid, and then connect the waste liquid external interface (13) to the acidic waste liquid. Inject the acidic waste liquid into the primary filter pipe (19) through a pressure pump. Filter the acidic liquid through the primary filter pipe (19). The filtered acidic liquid passes through the water wheel (18) and drives the water wheel (18) to rotate. The water wheel (18) drives the driving lead screw (26) to rotate through the transmission rod (17). The driving lead screw (26) drives the driving pipe (27) to move, so that the liquid suction piston (25) gradually moves away from the neutralizing liquid pipe (5) and sucks a certain proportion of the neutralizing liquid into the neutralizing liquid pipe (5). S2. During neutralization, first start the drive motor (6). The drive motor (6) drives the stirring rod (10) to rotate through its output end, stirring and neutralizing the mixed solution. At the same time, the stirring rod (10) drives the spraying unit to rotate, and the spraying unit drives the driving unit. The driving unit drives the injection piston (34) to reciprocate in the air extraction pipe (16), sucking in the outside gas through the one-way suction nozzle (35) and injecting it into the neutralization liquid pipe (5) through the secondary gas transmission pipe (33) and the primary gas transmission pipe (14), pushing the air push piston (24), evenly extruding and transporting the sucked neutralization liquid to the spraying assembly for uniform spraying of the neutralization liquid. And after the neutralization liquid is completely injected, the excess gas is transported through the pressure relief pipe (12) to the inner ring pipe (71) through the pressure relief valve (15), injecting gas into the neutralization barrel (3) through the inner ring pipe (71) to generate bubbles, improving the mixing and neutralization efficiency; S3. After neutralization is completed, turn off the drive motor (6), place the collecting dish at the sealing door (2), open the sealing door (2) to drain the neutralized waste liquid through the filter holes (9), and take out the filter residue from the neutralization barrel (3), the large particle filter screen and the small particle filter screen for complete neutralization treatment.

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