A pickling waste liquid purification device for hot galvanized steel pipe pretreatment

Abstract

This invention discloses a purification device for pickling waste liquid in the pretreatment of hot-dip galvanized steel pipes, belonging to the field of waste liquid purification technology. It aims to solve the technical problems of easy clogging and wall adhesion when treating high-viscosity, high-water-holding-content pickling waste residue. The device includes a machine tool, machine housing, rotating drum, screw conveyor, main motor, extrusion mechanism, anti-clogging component, and pushing component. Through the unique design of the pushing component, this invention achieves efficient dehydration and anti-clogging conveying of high-viscosity pickling waste residue. When the screw blades and screw strips reciprocate with a phase difference, they play key roles in the leftward and rightward phases respectively: in the leftward phase, a dynamic flow channel is formed, providing turbulent space for the viscous material, effectively preventing clogging and achieving self-cleaning; in the rightward phase, a high-pressure dehydration chamber with gradually decreasing volume is constructed, significantly reducing the moisture content of the cake through the synergistic effect of mechanical extrusion and centrifugal force. This "breathing" working mode effectively solves the technical problems of easy clogging and difficult dehydration of high-viscosity waste.

Description

Technical Field

[0001] This invention relates to the field of waste liquid purification technology, and more specifically, to a purification device for pickling waste liquid from the pretreatment of hot-dip galvanized steel pipes. Background Technology

[0002] Currently, the treatment of pickling waste liquid from hot-dip galvanized steel pipes generally uses traditional horizontal screw centrifuges. The core defect of these centrifuges lies in the single function of the screw conveyor structure. The fixed screw blades and the inner wall of the drum form a constant flow channel. When treating pickling waste residue with high viscosity and high water retention, the material easily forms a stubborn adhesion layer in the feeding area and on the blade surface, resulting in a continuous reduction in the effective flow channel diameter and frequent blockages. This structural limitation not only forces the equipment to be shut down intermittently for cleaning, seriously affecting the continuous production rhythm, but also becomes the primary bottleneck restricting the treatment efficiency. Besides the risk of clogging, the dewatering mechanism of traditional equipment has inherent shortcomings. Its uniformly rotating spiral blades can only produce linear propulsion and constant compression of the material, which is difficult to effectively break the dense network structure inside the high-viscosity waste residue. As a result, a large amount of bound water is trapped inside and cannot be released, and the moisture content of the sludge cake remains high. At the same time, the fixed working mode cannot adapt to the fluctuation of the composition and concentration of the incoming material. When the viscosity of the waste liquid changes, problems such as unstable moisture content of the sludge cake and decreased clarity of the separated liquid are likely to occur, reflecting the inadequacy of the existing technology to adapt to complex working conditions. In summary, existing technologies face three major challenges in treating special pickling waste residue due to the rigidity of the screw conveyor structure: first, the flow channel is prone to blockage, affecting the continuity of operation; second, dewatering is incomplete, and the moisture content of the mud cake is difficult to reduce effectively; and third, the adaptability is poor, and the working state cannot be dynamically adjusted according to the material characteristics. In view of this, we propose a pickling waste liquid purification device for pretreatment of hot-dip galvanized steel pipes. Summary of the Invention

[0003] The purpose of this invention is to provide a purification device for pickling waste liquid in the pretreatment of hot-dip galvanized steel pipes, so as to solve the technical problems of easy clogging and easy wall adhesion when treating pickling waste residue with high viscosity and high water holding capacity.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a purification device for pickling waste liquid in the pretreatment of hot-dip galvanized steel pipes, comprising a machine tool, a machine housing with a hinged structure arranged above the machine tool, a rotating drum housed inside the machine housing, a screw conveyor housed inside the rotating drum, two main motors arranged above the machine tool, an extrusion mechanism and an anti-clogging component arranged at one end of the rotating drum, and a pushing component arranged between the rotating drum and the screw conveyor. The pushing component includes a screw conveyor surface with a screw blade and a screw strip slidably fitted, the screw blade and the screw strip being sealed and slidably fitted, and grooves arranged on both sides of the screw strip; the rotating drum and the screw conveyor rotate, causing the screw blade and the screw strip to reciprocate linearly with a phase difference. When the spiral blades move to the left and the spiral strips move to the right, a gap is left between the inner wall of the spiral blades and the surface of the spiral conveyor, forming a dynamic flow channel that provides space for tumbling of viscous materials. When the spiral blades move to the right and the spiral strips move to the left, the inner wall of the spiral blades seals against the surface of the spiral conveyor, and the surface of the spiral strips seals against the inner wall of the conical section on the drum, forming a closed chamber with a gradually decreasing volume towards the discharge port. This creates a high-pressure dewatering chamber, which, in conjunction with centrifugal force, enables deep mechanical extrusion dewatering. This invention, through the unique design of the pushing component, achieves efficient dewatering and anti-clogging conveying of highly viscous pickling waste. Specifically, when the spiral blades and spiral strips reciprocate in phase-difference motion, they play key roles in the leftward and rightward phases: when moving to the left, a dynamic flow channel is formed, providing space for viscous materials to tumble, effectively preventing clogging and achieving self-cleaning; when moving to the right, a high-pressure dewatering chamber with a gradually decreasing volume is constructed, and through the synergistic effect of mechanical extrusion and centrifugal force, the moisture content of the cake is significantly reduced. This "breathing" working mode effectively solves the technical problems of high-viscosity waste being prone to clogging and difficult to dehydrate.

[0005] Preferably, each of the main motor output ends is provided with a drive wheel, and the drum and the screw conveyor are both equipped with a differential at one end, and the drive wheel and the differential are adapted to each other by belt drive.

[0006] Preferably, the extrusion mechanism includes a forming cylinder with a plurality of forming holes on its surface. The forming cylinder is fixedly connected to a drum at one of its conical ends. The inner wall of the forming cylinder is provided with a plurality of meshing grooves in a ring array. An inner convex ring is fitted onto the inner wall of the forming cylinder. An outer convex ring with a feed groove is fitted onto the end surface of the screw conveyor.

[0007] Preferably, a sealing plate is sleeved on one end of the screw conveyor, and the sealing plate is in sealing contact with the rotating drum. A number of rolling cylinders are rotatably connected to one side of the sealing plate in a ring array through a hollow tube, and the rolling cylinders are fixedly connected to the hollow tube. The convex surfaces of the rolling cylinders are provided with grooves, and the inner walls on both sides of each groove are arranged with an outer convex surface in a linear array.

[0008] Preferably, each of the grooves is internally sealed and slidably adapted to an extrusion block with an inner cavity. The extrusion block is meshed with the meshing groove, and the protrusion on the extrusion block is sealed and slidably adapted to the outer convex surface. The extrusion surface on the extrusion block is provided with air holes, and the air holes correspond to the positions of the forming holes on the forming cylinder. Several inlet holes are provided in a linear array on both sides of the extrusion block. The inner wall of the extrusion block is symmetrically structured with guide rods inserted, and several guide rods in a ring array are fixedly connected. Each guide rod is elastically adapted to the extrusion block by a first spring, and the end of the first spring is fixedly connected to the surface of the guide rod. A turbine feed plate is sleeved on one end of the housing, and the turbine feed plate is sleeved on the surface of the forming cylinder.

[0009] Preferably, the anti-clogging component includes a sealing ring, which is fixedly connected to the end of the hollow tube away from the rolling cylinder. A cover plate is rotatably connected to one side of the sealing ring, and an air supply pipe is fixedly connected to one side of the cover plate. The air supply pipe passes through the machine housing. An air supply system is arranged above the machine tool, and the output end of the air supply system is connected to the air supply pipe.

[0010] Preferably, each of the extrusion blocks has a number of hollow spheres fixedly connected in a linear array on its inner wall, and the hollow spheres are connected to the air holes. Each hollow sphere has an anti-blocking sphere rotatably connected to its inner wall, and the anti-blocking sphere is in rolling contact with the outer convex surface. Each anti-blocking sphere has an inner conical surface arranged at its output end.

[0011] Preferably, the feeding assembly further includes two first transmission rods, which are fixedly connected to one side of the spiral blade and pass through the spiral blade on the spiral conveyor. Two second transmission rods are fixedly connected to one end of the spiral strip.

[0012] Preferably, an inner ring track and an outer ring track are fixedly connected to the inner wall of one side of the drum, and the inner ring track is located inside the outer ring track. The end of the first transmission rod is slidably adapted to the inside of the inner ring track, and the end of the second transmission rod is slidably adapted to the inside of the outer ring track.

[0013] Preferably, both the outer ring track and the inner ring track are circular wave-shaped.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention achieves efficient dewatering and anti-clogging conveying of highly viscous pickling waste through a unique design of the feeding assembly. Specifically, when the spiral blades and spiral strips reciprocate in phase-difference motion, they play key roles in the leftward and rightward phases respectively: During the leftward movement, a dynamic flow channel is formed, providing tumbling space for the viscous material, effectively preventing clogging and achieving self-cleaning; during the rightward movement, a high-pressure dewatering chamber with gradually decreasing volume is constructed, significantly reducing the moisture content of the cake through the synergistic effect of mechanical extrusion and centrifugal force. This "breathing" working mode effectively solves the technical problems of easy clogging and difficult dewatering of highly viscous waste.

[0015] 2. This invention employs an innovative pneumatic discharge method, achieving both the molding and clean discharge of waste materials through an extrusion mechanism, effectively overcoming the inherent defects of traditional centrifugal discharge methods. The waste material is pressed into the molding hole by the extrusion block between the molding cylinder and the crushing cylinder, completing its shaping. Subsequently, the formed waste block is completely pushed out of the molding hole using air pressure difference and smoothly discharged along the arc-shaped surface of the turbine discharge plate. Compared to the traditional method of relying on centrifugal force to throw out waste materials and pulverize them upon impact with the machine casing, this method avoids the problem of wet waste materials adhering to the inner wall of the machine casing, reducing cleaning difficulty and workload, and greatly improving discharge efficiency and cleanliness.

[0016] 3. This invention incorporates a sophisticated anti-clogging component, ensuring the long-term unobstructed flow of the discharge channel and significantly improving the reliability and continuity of equipment operation. The anti-clogging ball within the component automatically opens and closes the air vent channel as the extrusion block moves. It opens during discharge, allowing airflow to blow out any waste material that may enter; it closes during non-discharge phases, effectively preventing waste particles from backflowing and clogging the air vents. This proactive anti-clogging design ensures the stable operation of the pneumatic discharge system, allowing the aforementioned beneficial effects to continue for a long time and meeting the stringent requirements of continuous industrial production.

[0017] 4. This invention, through the original design of the feeding component, achieves dynamic pretreatment and efficient deep dehydration of highly viscous materials, fundamentally solving the industry problems of clogging and incomplete dehydration. The spiral blades and spiral strips reciprocate in phase difference under the drive of a wave-shaped track; when they move in opposite directions, they form a periodically expanding dynamic flow channel, providing space for material to tumble and utilizing liquid backwashing to effectively prevent inlet blockage. Simultaneously, it breaks down the dense structure of the material, releasing internal moisture. Its scraping action also has a self-cleaning function, preventing adhesion to the walls. When the two move towards each other and seal with adjacent components, a high-pressure dehydration chamber with gradually decreasing volume is constructed, generating enormous mechanical extrusion force. This force, combined with centrifugal force, significantly reduces the moisture content of the cake and ensures stable material transport, resulting in a clearer separated liquid. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention, showing the internal structure of the housing; Figure 2 For the present invention Figure 1 Enlarged structural diagram at point A in the diagram; Figure 3 This is a schematic diagram of the overall structure of the present invention; Figure 4 This is a schematic diagram of the three-dimensional structure of the drum of the present invention; Figure 5 This is a three-dimensional exploded view of the extrusion mechanism of the present invention; Figure 6 This is a cross-sectional schematic diagram of the extrusion mechanism structure of the present invention, to show the internal structure of the rolling cylinder; Figure 7 This is a schematic diagram of the internal structure of the extrusion block of the present invention; Figure 8 This is a schematic diagram of the cross-sectional structure of the rolling cylinder of the present invention; Figure 9 This is a schematic diagram of the compaction structure of the roller cylinder of the present invention in its compaction state. Figure 10 This is a schematic diagram of the material discharge structure of the compaction cylinder of the present invention. Figure 11This is a schematic cross-sectional view of the extrusion mechanism structure of the present invention, showing the cross-sectional structure of the turbine feed plate; Figure 12 This is a three-dimensional structural diagram of the feeding assembly of the present invention; Figure 13 This is a schematic diagram of the feeding assembly of the present invention in use. Figure 14 This is a schematic diagram of the feeding assembly of the present invention in its feeding state.

[0019] Explanation of the labels in the diagram: 1. Machine tool; 2. Machine housing; 3. Drum; 31. Screw conveyor; 32. Main motor; 33. Drive wheel; 34. Differential; 35. Belt; 4. Extrusion mechanism; 41. Forming cylinder; 411. Engaging groove; 412. Inner convex ring; 42. Outer convex ring; 43. Sealing plate; 44. Hollowed-out tube; 45. Rolling cylinder; 46. Slide groove; 461. Outer convex surface; 47. Extrusion block; 471. Air hole; 47 2. Inlet hole; 48. Guide rod; 49. First spring; 410. Turbine feed plate; 5. Anti-clogging component; 51. Sealing ring; 52. Cover plate; 53. Air supply pipe; 54. Air supply system; 55. Hollow sphere; 56. Anti-clogging sphere; 561. Inner conical surface; 6. Pushing component; 61. Spiral blade; 611. First transmission rod; 62. Spiral strip; 621. Second transmission rod; 63. Inner ring track; 64. Outer ring track. Detailed Implementation

[0020] like Figures 1-11 As shown, the present invention relates to a purification device for pickling waste liquid in the pretreatment of hot-dip galvanized steel pipes, comprising a machine tool 1, a machine housing 2 with a hinged structure arranged above the machine tool 1, a rotating drum 3 housed inside the machine housing 2, a screw conveyor 31 with helical blades housed inside the rotating drum 3, two main motors 32 arranged above the machine tool 1, an extrusion mechanism 4 and an anti-blocking component 5 arranged at one end of the rotating drum 3, and a pushing component 6 arranged between the rotating drum 3 and the screw conveyor 31.

[0021] It is worth noting that the rotating drum 3 and the screw conveyor 31 are conventional structures, welded together from cylindrical and conical sections. An adjustable overflow weir plate is provided at the large end to control the depth of the liquid pool, and a slag discharge port is provided at the small end. They can generate a centrifugal force field during high-speed rotation to achieve solid-liquid separation. The feed pipe of the screw conveyor 31 passes through the hollow shaft, and its spiral blades are typically overlaid with wear-resistant materials such as tungsten carbide to push the solids settled on the inner wall of the rotating drum 3 towards the slag discharge port.

[0022] Each main motor 32 has a transmission wheel 33 at its output end. The drum 3 and the screw conveyor 31 are both equipped with a differential 34 at one end. The transmission wheel 33 and the differential 34 are connected by a belt 35.

[0023] The extrusion mechanism 4 includes a forming cylinder 41 with several forming holes on its surface. The forming cylinder 41 is fixedly connected to the drum 3 at one conical end. The inner wall of the forming cylinder 41 has several meshing grooves 411 arranged in a ring array. An inner convex ring 412 is sleeved on the inner wall of the forming cylinder 41. An outer convex ring 42 with a feed groove is sleeved on the end surface of the screw conveyor 31. A sealing plate 43 is sleeved on one end of the screw conveyor 31, and the sealing plate 43 is in sealing contact with the drum 3. Several pressing cylinders 45 are rotatably connected to one side of the sealing plate 43 in a ring array through a hollow tube 44, and the pressing cylinders 45 are fixedly connected to the hollow tube 44. The convex surfaces of the pressing cylinders 45 are all provided with sliding grooves 46. The inner walls on both sides of each sliding groove 46 are arranged in a linear array with outer convex surfaces 461. Each sliding groove 46 has an inner groove 46. The extrusion block 47 with an inner cavity is sealed and slidably adapted to the extrusion block 47. The extrusion block 47 is meshed with the engagement groove 411, and the protrusion on the extrusion block 47 is sealed and slidably adapted to the outer convex surface 461. The extrusion surface on the extrusion block 47 is provided with air holes 471, and the air holes 471 correspond to the positions of the forming holes on the forming cylinder 41. Several inlet holes 472 are provided in a linear array on both sides of the extrusion block 47. The inner wall of the extrusion block 47 is symmetrically structured with guide rods 48 inserted, and several guide rods 48 in a ring array are fixedly connected. Each guide rod 48 is elastically adapted to the extrusion block 47 by a first spring 49, and the end of the first spring 49 is fixedly connected to the surface of the guide rod 48. A turbine feed plate 410 is sleeved on one end of the housing 2, and the turbine feed plate 410 is sleeved on the surface of the forming cylinder 41.

[0024] It is worth noting that the surface of the turbine feed plate 410 is arc-shaped and open at both ends, which facilitates the smooth discharge of the compacted waste material along the arc surface.

[0025] It is worth noting that this embodiment adopts a pneumatic discharge method, which compacts the waste material by squeezing and then pushes it out using the air pressure difference. Compared with the existing technology that relies on centrifugal force to throw out the waste material and cause it to collide with the casing 2 and be crushed, this method can avoid wet waste material from adhering to the inner wall of the casing 2 and reduce the difficulty of cleaning.

[0026] Specifically, when discharging solid waste with high moisture content but not in a paste-like state, the moist waste flows into the forming cylinder 41 through the screw conveyor 31. At this time, there is a differential rotation between the drum 3 and the screw conveyor 31, causing the screw conveyor 31 to drive the circular shafts of several pressing cylinders 45 to move, causing the pressing cylinders 45 to roll inside the forming cylinder 41. Due to centrifugal force, the moist waste inside the forming cylinder 41 is located on its inner wall, which can feed material between the forming cylinder 41 and the pressing cylinders 45. When the extrusion block 47 is properly engaged with the meshing groove 411, the extrusion block 47 is subjected to the elastic force applied by the first spring 49, causing the extrusion block 47 to press against the material containing moisture. The wet waste material is subjected to extrusion pressure, causing it to enter the forming hole on the forming cylinder 41. When the extrusion block 47 is fully pressed into the meshing groove 411, the extrusion block 47 slides into the rolling cylinder 45 in the sliding groove 46, causing the inlet hole 472 to move out from the sliding groove 46. The airflow enters the inner cavity of the extrusion block 47 from the inlet hole 472 and then flows out from the air hole 471, applying air pressure to the forming hole on the forming cylinder 41, discharging the compacted waste material inside, and flowing out along the inner wall of the turbine discharge plate 410. This avoids the problem of wet waste material adhering to the machine casing 2 in the traditional centrifugal discharge method. At the same time, the complete forming and discharge of waste material is achieved by air pressure pushing, which greatly improves the discharge efficiency and quality.

[0027] This invention employs an innovative pneumatic discharge method, using an extrusion mechanism 4 to achieve both the molding and clean discharge of waste materials, effectively overcoming the inherent defects of traditional centrifugal discharge methods. The waste material is pressed into the molding hole by the extrusion block 47 between the molding cylinder 41 and the crushing cylinder 45, completing its shaping. Subsequently, the formed waste material block is completely pushed out of the molding hole using air pressure difference and smoothly discharged along the arc-shaped surface of the turbine discharge plate 410. Compared to the traditional method of relying on centrifugal force to throw out waste material and pulverize it upon impact with the casing 2, this method avoids the problem of wet waste material adhering to the inner wall of the casing 2, reducing cleaning difficulty and workload, and greatly improving discharge efficiency and cleanliness.

[0028] like Figure 1 , Figure 5 and Figures 7-10 As shown, the anti-blocking component 5 includes a sealing ring 51, which is fixedly connected to the end of the hollow tube 44 away from the rolling cylinder 45. A cover plate 52 is rotatably connected to one side of the sealing ring 51, and an air supply pipe 53 is fixedly connected to one side of the cover plate 52. The air supply pipe 53 passes through the machine housing 2. An air supply system 54 is arranged above the machine tool 1, and the output end of the air supply system 54 is connected to the air supply pipe 53. Several hollow spheres 55 are fixedly connected in a linear array on the inner wall of each extrusion block 47, and the hollow spheres 55 are connected to the air holes 471. An anti-blocking sphere 56 is rotatably connected to the inner wall of each hollow sphere 55, and the anti-blocking sphere 56 is in rolling contact with the outer convex surface 461. An inner conical surface 561 is arranged at the output end of each anti-blocking sphere 56.

[0029] Specifically, when the compacted waste is discharged by air pressure, the extrusion block 47 contacts the waste and moves into the rolling cylinder 45. At this time, the anti-blocking ball 56 rolls and rotates axially with the outer convex surface 461, causing the output end of the anti-blocking ball 56 to connect with the air hole 471. After the waste enters the air hole 471, it accumulates on the inner conical surface 561, and then the waste is discharged through the air flow. When the extrusion block 47 separates from the meshing groove 411, the first spring 49 applies a force to the extrusion block 47, causing the extrusion block 47 to slide. The anti-blocking ball 56 rolls on the surface of the outer convex surface 461, so that the anti-blocking ball 56 with the inner conical surface 561 disconnects from the air hole 471, avoiding the accumulation and blockage of waste particles in the air hole 471, ensuring the continuous smooth flow of the air pressure discharge channel, and greatly improving the operational reliability of the equipment.

[0030] This invention incorporates a sophisticated anti-clogging component 5, ensuring the long-term unobstructed flow of the discharge channel and significantly improving the reliability and continuity of equipment operation. The anti-clogging ball 56 within the anti-clogging component 5 automatically opens and closes the air vent 471 as the extrusion block 47 moves. It opens during discharge, allowing airflow to blow out any waste material that may enter; it closes during non-discharge phases, effectively preventing waste particles from backflowing and clogging the air vent 471. This proactive anti-clogging design ensures the stable operation of the pneumatic discharge system, allowing the aforementioned beneficial effects to continue for a long time and meeting the stringent requirements of continuous industrial production.

[0031] like Figures 12-13 As shown, the feeding assembly 6 includes a spiral blade 61, which is slidably sleeved on the surface of the screw conveyor 31. A first transmission rod 611 is fixedly connected to one side of the spiral blade 61, and the first transmission rod 611 passes through the spiral blade on the screw conveyor 31. A spiral strip 62 is slidably sleeved on the surface of the spiral blade 61, and the spiral strip 62 is in movable contact with the inner wall of the drum 3. A second transmission rod 621 is fixedly connected to one end of the spiral strip 62. An inner ring track 63 and an outer ring track 64 are fixedly connected to one side of the inner wall of the drum 3, and the inner ring track 63 is located inside the outer ring track 64. The end of the first transmission rod 611 is slidably adapted to the inside of the inner ring track 63, and the end of the second transmission rod 621 is slidably adapted to the inside of the outer ring track 64. The outer ring track 64 and the inner ring track 63 are in a ring wave shape.

[0032] It is worth noting that the spiral strip 62 has grooves on both sides, which scrape and shear the mud cake when rotating, effectively peeling off the initial adhesive layer and keeping the flow channel unobstructed. It is especially suitable for the processing of highly viscous materials and effectively prevents the problem of wall clogging.

[0033] It is worth noting that the inner diameter of the spiral blades 61 is uniform, which allows a channel or a complete seal to be formed between the end of the spiral conveyor 31 and the spiral blades 62. There is a gap between the conical section of the drum 3 and the spiral blades 62. When the spiral blades 62 move to one side, they seal against the inner wall of the drum 3. When they move to the other side, the gap increases, forming a dynamic flow channel.

[0034] It is worth noting that the outer ring track 64 and the inner ring track 63 have opposite wave phases, causing the spiral blade 61 and the spiral strip 62 to reciprocate with a phase difference, and the two always remain sealed.

[0035] Specifically, the drum 3 and the screw conveyor 31 rotate, and there is a differential rotation between the drum 3 and the screw conveyor 31, causing the screw strip 62 and the screw blade 61 to reciprocate linearly with a phase difference. While the screw blade 61 moves to the left, the screw strip 62 moves to the right, leaving a gap between the screw blade 61 and the screw conveyor 31. The gap between the screw strip 62 and the upper conical section of the drum 3 is the largest, realizing a dynamic flow channel and material pretreatment. The outflowing gap provides a smooth entry channel and tumbling space for high-viscosity or fibrous materials, effectively preventing the feed inlet from clogging. At the same time, the gap allows the liquid to flush and shear the solid layer, breaking the dense structure and releasing the internally trapped water, creating an excellent environment for subsequent deep dehydration. Conditions; This action also has a self-cleaning function, which can scrape off adhering materials and ensure long-term continuous operation of the equipment; While the spiral blade 61 moves to the right, the spiral strip 62 moves to the left. The spiral blade 61 and the spiral conveyor 31 are sealed and matched, and the spiral strip 62 and the upper conical section of the drum 3 are sealed and matched, thus constructing a high-pressure dewatering chamber and achieving stable conveying. The sealed match forms a continuous and closed chamber. As it is pushed towards the discharge port, the volume gradually decreases, generating a stable and huge mechanical extrusion force on the material, thereby achieving efficient dewatering and significantly reducing the moisture content of the mud cake; At the same time, the sealed state ensures that the material is stably pushed without backflow, resulting in high conveying efficiency and the formation of a clear mud-water interface, resulting in a clearer separated liquid.

[0036] This invention, through the original design of the feeding component 6, achieves dynamic pretreatment and efficient deep dehydration of highly viscous materials, fundamentally solving the industry problems of clogging and incomplete dehydration. The spiral blades 61 and 62 reciprocate in phase difference motion driven by a wave-shaped track. When they move in opposite directions, they form a periodically expanding dynamic flow channel, providing space for material to tumble and utilizing liquid backwashing to effectively prevent inlet blockage. Simultaneously, it breaks down the dense structure of the material, releasing internal moisture. Its scraping action also has a self-cleaning function, preventing adhesion to the walls. When they move towards each other and seal with adjacent components, a high-pressure dehydration chamber with gradually decreasing volume is constructed, generating enormous mechanical extrusion force. This force, combined with centrifugal force, significantly reduces the moisture content of the cake and ensures stable material transport, resulting in a clearer separated liquid.

[0037] Working principle: This embodiment provides a purification device for pickling waste liquid in the pretreatment of hot-dip galvanized steel pipes. First, the pickling waste liquid is transported to the drum 3 by an external water pump and other components. Two main motors 32 drive the drum 3 and the screw conveyor 31 to rotate at different speeds and at high speed through the circuit mechanism. The pickling waste liquid in the drum 3 is subjected to centrifugal force, causing the solid waste residue in the waste liquid to settle to its inner wall. The liquid is discharged through the adjustable overflow weir plate at one end of the drum 3, controlling the depth of the liquid pool. The spiral blades of the screw conveyor 31 continuously push the settled waste residue to one end of the upper conical section of the drum 3. Moist waste enters the forming cylinder 41. Due to the differential rotation between the drum 3 and the screw conveyor 31, the screw conveyor 31 drives several rolling cylinders 45 to roll and crush inside the forming cylinder 41. When the meshing groove 411 on the inner wall of the forming cylinder 41 meshes with the extrusion block 47, the elastic force of the first spring 49 pushes the extrusion block 47 to apply extrusion force to the waste, causing the waste to enter the forming hole of the forming cylinder 41 and be compacted. When the extrusion block 47 is fully pressed into the meshing groove 411, the inlet hole 472 moves out of the slide groove 46, and the anti-blocking ball 56 rolls on the outer convex surface 461 with the sliding of the extrusion block 47, causing its output end to connect with the air hole 471. The air supply system 54 supplies air to the inner cavity of the extrusion block 47 through the air supply pipe 53 and the hollow pipe 44. The airflow is ejected from the air hole 471, which can discharge the waste residue blocked in the air hole 471. At the same time, the compacted waste residue in the forming hole is discharged by using the air pressure difference. The waste residue flows out along the arc surface of the turbine feed plate 410. When the meshing groove 411 is not meshed with the extrusion block 47, the first spring 49 applies a force to the extrusion block 47, causing the extrusion block 47 to slide. The anti-blocking ball 56 rolls on the outer convex surface 461 as the extrusion block 47 slides, causing the output end of the anti-blocking ball 56 to disconnect from the air hole 471. When the drum 3 and the screw conveyor 31 rotate at different speeds and at high speeds, the spiral blades 61 and the spiral strips 62 move in a reciprocating linear motion with a phase difference under the guidance of the inner ring track 63 and the outer ring track 64, which are in the shape of annular waves, respectively, through the first transmission rod 611 and the second transmission rod 621. When the spiral blades 61 move to the left and the spiral strips 62 move to the right, a gap is formed between the spiral blades 61 and the screw conveyor 31, and the gap between the spiral strips 62 and the conical section of the drum 3 increases, providing a feeding channel for high-viscosity waste residue and achieving self-cleaning. At the same time, the liquid washes the waste residue layer and releases the internal moisture. When the spiral blades 61 move to the right and the spiral strips 62 move to the left, they respectively seal and fit with the screw conveyor 31 and the conical section of the drum 3, forming a high-pressure dewatering chamber with decreasing volume, which deeply dewaters the waste residue and stably pushes it to the slag discharge port.

[0038] The embodiments disclosed in this invention are preferred embodiments, but are not limited thereto. Those skilled in the art can easily understand the spirit of this invention based on the above embodiments and make different extensions and variations, but as long as they do not depart from the spirit of this invention, they are all within the protection scope of this invention.

Claims

1. A purification device for pickling waste liquid in the pretreatment of hot-dip galvanized steel pipes, comprising a machine tool (1), a machine housing (2) with a hinged structure arranged above the machine tool (1), a drum (3) fitted inside the machine housing (2), a screw conveyor (31) fitted inside the drum (3), two main motors (32) arranged above the machine tool (1), an extrusion mechanism (4) and an anti-blocking component (5) arranged at one end of the drum (3), and a pushing component (6) arranged between the drum (3) and the screw conveyor (31), characterized in that, The feeding assembly (6) includes a screw conveyor (31) with a screw blade (61) and a screw strip (62) slidingly fitted on its surface. The screw blade (61) and the screw strip (62) are sealed and slidably fitted. Grooves are arranged on both sides of the screw strip (62). The drum (3) rotates with the screw conveyor (31), causing the screw blade (61) and the screw strip (62) to reciprocate in a linear motion with a phase difference. When the spiral blade (61) moves to the left and the spiral strip (62) moves to the right, a gap is left between the inner wall of the spiral blade (61) and the surface of the spiral conveyor (31), forming a dynamic flow channel to provide tumbling space for viscous materials; when the spiral blade (61) moves to the right and the spiral strip (62) moves to the left, the inner wall of the spiral blade (61) is in sealed contact with the surface of the spiral conveyor (31), and the surface of the spiral strip (62) is in sealed contact with the inner wall of the conical section on the drum (3), forming a closed chamber with a gradually decreasing volume towards the discharge port, which can construct a high-pressure dewatering chamber, and work in conjunction with centrifugal force to achieve deep mechanical extrusion dewatering; The extrusion mechanism (4) includes a forming cylinder (41) with several forming holes on its surface. The forming cylinder (41) is fixedly connected to the drum (3) at one end of a cone shape. The inner wall of the forming cylinder (41) is provided with several meshing grooves (411) in a ring array. An inner convex ring (412) is sleeved on the inner wall of the forming cylinder (41). An outer convex ring (42) with a feed groove is sleeved on the end surface of the screw conveyor (31). One end of the screw conveyor (31) is fitted with a sealing plate (43), and the sealing plate (43) is in sealed contact with the rotating drum (3). A number of rolling cylinders (45) are rotatably connected to one side of the sealing plate (43) through a hollow tube (44), and the rolling cylinders (45) are fixedly connected to the hollow tube (44). The convex surface of the rolling cylinder (45) is provided with a sliding groove (46), and the inner walls on both sides of each sliding groove (46) are arranged with an outer convex surface (461) in a linear array. Each of the grooves (46) is internally sealed and slidably adapted to an extrusion block (47) with an inner cavity. The extrusion block (47) is meshed with the meshing groove (411), and the protrusion on the extrusion block (47) is sealed and slidably adapted to the outer convex surface (461). The extrusion surface on the extrusion block (47) is provided with an air hole (471), and the air hole (471) corresponds to the position of the forming hole on the forming cylinder (41). Both sides of the extrusion block (47) are provided with a number of inlet holes (472) in a linear array. The inner wall of the extrusion block (47) is symmetrically structured with a guide rod (48), and a number of guide rods (48) in a ring array are fixedly connected. Each guide rod (48) is elastically adapted to the extrusion block (47) through a first spring (49), and the end of the first spring (49) is fixedly connected to the surface of the guide rod (48). Each of the extrusion blocks (47) has a number of hollow spheres (55) fixedly connected in a linear array on its inner wall, and the hollow spheres (55) are connected to the air holes (471). Each hollow sphere (55) has an anti-blocking sphere (56) rotatably connected to its inner wall, and the anti-blocking sphere (56) is in rolling contact with the outer convex surface (461). Each anti-blocking sphere (56) has an inner conical surface (561) arranged at its output end.

2. The pickling waste liquid purification device for pretreatment of hot-dip galvanized steel pipes according to claim 1, characterized in that, Each of the main motors (32) is equipped with a drive wheel (33) at its output end. The drum (3) and the screw conveyor (31) are both equipped with a differential (34) at one end. The drive wheel (33) and the differential (34) are connected by a belt (35).

3. The pickling waste liquid purification device for pretreatment of hot-dip galvanized steel pipes according to claim 2, characterized in that, The casing (2) is fitted with a turbine feed plate (410) at one end, and the turbine feed plate (410) is fitted on the surface of the forming cylinder (41). The surface of the turbine feed plate (410) is arc-shaped and open at both ends, so that the compacted waste material can be smoothly discharged along the arc surface.

4. The pickling waste liquid purification device for pretreatment of hot-dip galvanized steel pipes according to claim 3, characterized in that, The anti-blocking component (5) includes a sealing ring (51), which is fixedly connected to the end of the hollow tube (44) away from the rolling cylinder (45). A cover plate (52) is rotatably connected to one side of the sealing ring (51), and an air supply pipe (53) is fixedly connected to one side of the cover plate (52). The air supply pipe (53) passes through the machine housing (2). An air supply system (54) is arranged above the machine tool (1), and the output end of the air supply system (54) is connected to the air supply pipe (53).

5. The pickling waste liquid purification device for pretreatment of hot-dip galvanized steel pipes according to claim 4, characterized in that, The feeding assembly (6) also includes two first transmission rods (611), which are fixedly connected to one side of the spiral blade (61) and pass through the spiral blade on the spiral conveyor (31). Two second transmission rods (621) are fixedly connected to one end of the spiral strip (62).

6. The pickling waste liquid purification device for pretreatment of hot-dip galvanized steel pipes according to claim 5, characterized in that, The inner wall of one side of the drum (3) is fixedly connected to an inner ring track (63) and an outer ring track (64), and the inner ring track (63) is located inside the outer ring track (64). The end of the first transmission rod (611) is slidably adapted to the inside of the inner ring track (63), and the end of the second transmission rod (621) is slidably adapted to the inside of the outer ring track (64).

7. The pickling waste liquid purification device for pretreatment of hot-dip galvanized steel pipes according to claim 6, characterized in that, Both the outer ring track (64) and the inner ring track (63) are circular wave-shaped.

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