A quartz sand acid wastewater treatment device

Abstract

This invention relates to the field of quartz sand processing wastewater treatment technology, and discloses a quartz sand acid wastewater treatment device, comprising a neutralization tank, a sedimentation tank, and a clear water tank arranged sequentially. The bottom of the sedimentation tank is connected to a sewage pipe, and an anti-clogging and cleaning mechanism that can move axially along the inlet side of the sewage pipe is provided. The anti-clogging and cleaning mechanism includes a linear propulsion component, a rotary crushing component, an elastic wall-mounted scraping component, a secondary shearing component, and a negative pressure slag discharge component. The rotary crushing component uses a conical ring frame and a first scraper to crush calcium fluoride, calcium sulfate crystals, and hardened sludge. An elastic second scraper simultaneously scrapes off the deposits on the pipe wall. A round rod and a rake plate cooperate to perform secondary shearing. A fan-shaped cover pumps the crushed material out through a material pipe, a hollow ring, and a flexible hose. This invention achieves simultaneous crushing, wall scraping, refining, and pumping, reducing secondary deposition of crushed material. It restores sewage discharge capacity without disassembling the sewage pipe, improving the solid-liquid separation and continuous operation stability of acid wastewater.

Description

Technical Field

[0001] The present invention belongs to the technical field of wastewater treatment equipment, and specifically relates to a quartz sand acidic wastewater treatment device. Background Art

[0002] The quartz sand acidic wastewater treatment equipment is a complete set of equipment supporting the high-purity quartz sand pickling and purification production line and specially used for treating acidic wastewater generated in the quartz sand pickling process, belonging to the technical field of environmental protection equipment for quartz sand processing. It is used to treat the acidic wastewater generated in the quartz sand pickling process. Through the synergistic effect of neutralization reaction, flocculation sedimentation and solid-liquid separation, the equipment removes acidic substances, fluoride ions, heavy metals and suspended particulate matters in the wastewater, so as to realize purification and reuse of the wastewater or discharge up to the standard, and solve the pollution problem of acidic wastewater from quartz sand pickling.

[0003] When the existing quartz sand acidic wastewater treatment equipment is in use, the quartz sand acidic wastewater is pumped into the neutralization tank of the wastewater treatment machine by a delivery pump, and then chemicals are added into the neutralization tank. The acidic wastewater and the chemical liquid are mixed and stirred by the rotation of the stirring blades of the stirrer. After the chemical neutralization is completed, the wastewater in the neutralization tank is delivered to the sedimentation tank by a lifting pump for sedimentation, so that the sludge settles at the bottom and is separated from the clean water. Then the external pipeline connected to the sewage discharge pipe cooperates with the sewage discharge pump to discharge the sludge in the sedimentation tank, and the clean water is delivered by the water pump to the clean water tank, purified by the filtering mechanism and then discharged through the drain pipe, so as to realize the treatment of the acidic wastewater from quartz sand.

[0004] However, during long-term operation of the equipment, hard crystalline particles are likely to adhere and accumulate together with hardened sludge on the inner wall of the sewage discharge pipe, which frequently causes sewage discharge blockage, leading to sludge deposition at the bottom of the sedimentation tank, occupying the effective volume of the sedimentation tank, shortening the hydraulic retention time, and reducing the solid-liquid separation effect. At the same time, the accumulated sludge is easily disturbed by the water flow and floats upward, causing water turbidity, excessive suspended solids and fluorides in the effluent, and poor wastewater treatment stability. Contents of the Invention

[0005] To solve the above technical problems, the technical solution adopted by the present invention is: a quartz sand acidic wastewater treatment device, comprising a wastewater treatment machine, wherein the wastewater treatment machine comprises a neutralization tank, a sedimentation tank and a clean water tank, the lower part of the sedimentation tank is communicated with a sewage discharge pipe, an anti-clogging cleaning mechanism is arranged in the sedimentation tank at a position corresponding to the inlet end of the sewage discharge pipe, and the anti-clogging cleaning mechanism comprises a fixing frame, a linear driving member, a barrel member, a rotary crushing assembly and a negative pressure deslagging assembly; the fixing frame is arranged in the sedimentation tank, and the linear driving member is arranged on the fixing frame and connected with the barrel member, and is used for driving the barrel member to reciprocate along the axial direction of the sewage discharge pipe between a retracted position and a cleaning position; The rotary crushing assembly includes a motor, a shaft, a conical ring frame, and multiple first scrapers. The motor is mounted on the cylinder and is connected to the conical ring frame via the shaft. The multiple first scrapers are spaced apart circumferentially along the conical ring frame. A ring is connected to the rear side of the conical ring frame via multiple connecting rods. Multiple spring rods are arranged circumferentially on the ring. The outer end of each spring rod is connected to a second scraper for elastically fitting against the inner wall of the sewage pipe. The negative pressure slag discharge assembly includes multiple fan-shaped hoods, multiple material pipes, a hollow ring, a hose, pipe fittings, and a pump. The suction ports of the multiple fan-shaped hoods face the rear material collection area of ​​the rotary crushing assembly. The multiple fan-shaped hoods are respectively connected to the hollow ring through the corresponding material pipes. The hollow ring is connected to the pump in sequence through the hose and the pipe fittings, so as to extract the formed fragments while the rotary crushing assembly crushes the blockage and the second scraper scrapes off the pipe wall deposits.

[0006] In a preferred embodiment of the present invention, the linear drive component is an electric telescopic rod, the fixed end of which is mounted on the fixed frame, and the telescopic end of which is connected to the cylindrical component; the fixed frame is provided with a guide portion parallel to the central axis of the sewage pipe, and the cylindrical component moves linearly under the constraint of the guide portion.

[0007] In a preferred embodiment of the present invention, a hollow rod is provided at the center of the cylindrical component, and the shaft is rotatably inserted through the hollow rod. An acid-resistant seal and a rotating support are provided between the shaft and the hollow rod, and the motor is disposed in the sealing cavity of the cylindrical component.

[0008] In a preferred embodiment of the present invention, the small end of the conical ring frame faces the interior of the sewage pipe, and a plurality of first scrapers extend obliquely from the small end to the large end of the conical ring frame. The outer side of the first scraper forms a crushing blade, and the crushing surface of the first scraper is provided with a plurality of protrusions to progressively cut and impact-crush the crystal blocks and hardened sludge in the sewage pipe.

[0009] In a preferred embodiment of the present invention, a plurality of spring rods are evenly distributed along the circumference of the ring, the second scraper is inclined relative to the axial direction of the sewage pipe, and a wear-resistant rod is provided on the outer edge of the second scraper. The radial elastic force provided by the spring rod keeps the wear-resistant rod in contact with the inner wall of the sewage pipe.

[0010] In a preferred embodiment of the present invention, a plurality of rake plates are fixedly arranged around the hollow rod at the front of the cylinder, and strip-shaped gaps are formed on the rake plates for the passage of crushed material; a circular rod is provided on the plurality of connecting rods or the rings, which rotates synchronously with the shaft, and the rotation path of the circular rod passes through the area between adjacent rake plates, so that the circular rod and the rake plates cooperate to form a secondary shearing structure.

[0011] In a preferred embodiment of the present invention, a plurality of the fan-shaped covers are arranged circumferentially along the cylinder and located on the rear side of the rake plate, and the suction port of the fan-shaped cover corresponds to the strip gap of the rake plate; the pump is a corrosion-resistant slag discharge pump, and the minimum diameter of its flow channel is greater than the maximum particle size of the crushed material after being processed by the secondary shearing structure.

[0012] In a preferred embodiment of the present invention, at least three rectangular tubes are provided on the outer periphery of the hollow ring, and a hole frame is adjustablely inserted in each of the rectangular tubes. A rubber roller is rotatably provided on the outer end of the hole frame. The hole frame is locked by fasteners passing through different holes, so that the multiple rubber rollers can be adjusted according to the inner diameter of the sewage pipe and rolled and supported on the inner wall of the sewage pipe.

[0013] In a preferred embodiment of the present invention, the first scraper and the second scraper are spaced apart in the axial direction of the sewage pipe and staggered in the circumferential direction; when the anti-clogging cleaning mechanism is in the retracted position, the conical ring frame, the first scraper and the second scraper are all withdrawn from the main sewage channel of the sewage pipe; when in the cleaning position, the first scraper is located at the front end of the blockage and the second scraper is located behind the first scraper and adheres to the pipe wall.

[0014] In a preferred embodiment of the present invention, the conical ring frame, the first scraper, the connecting rod, the ring, the second scraper, the rake, the fan-shaped cover, and the pipeline in contact with the acidic wastewater are made of acid-resistant metal materials, acid-resistant non-metal materials, or have an acid-resistant and wear-resistant protective layer on their surface; the hose is a flexible tube that is resistant to negative pressure, acid-resistant, and can compensate for the reciprocating displacement of the cylindrical component.

[0015] Compared with the prior art, the present invention has the following advantages: This invention enables pipeline unblocking without disassembling the pipeline or stopping the machine. It thoroughly breaks down hard, highly adhesive calcium fluoride and calcium sulfate crystals and sludge through mechanical crushing. At the same time, it removes the crushed crystal particles and sludge blockages from the sewage pipe, preventing secondary residues of the crushed crystal particles and sludge from adhering to the inner wall of the sewage pipe. This ensures the smooth flow of the sewage pipeline, avoids repeated blockages, ensures the smooth and sufficient discharge of sludge from the bottom of the sedimentation tank, prevents sludge from floating and water from becoming turbid, and improves the overall operational stability of the wastewater treatment machine.

[0016] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0017] In the attached diagram: Figure 1 This is a partial cross-sectional view of the wastewater treatment machine of the present invention; Figure 2 For the present invention Figure 1 A schematic diagram of a partial three-dimensional structure; Figure 3 This is a three-dimensional structural diagram of the fixing frame of the present invention; Figure 4 This is a partial cross-sectional view of the cylindrical component of the present invention; Figure 5 This is a three-dimensional structural diagram of the hollow ring of the present invention; Figure 6 This is a three-dimensional structural diagram of the fan-shaped cover of the present invention; Figure 7 This is a three-dimensional structural diagram of the first scraper of the present invention; Figure 8 This is a three-dimensional structural diagram of the ring of the present invention.

[0018] In the diagram: 1. Wastewater treatment machine; 101. Neutralization tank; 102. Sedimentation tank; 103. Clear water tank; 2. Mixer; 3. Sewage pipe; 4. Drainage pipe; 5. Shredder assembly; 51. Fixing frame; 52. Electric telescopic rod; 53. Cylinder; 54. Hollow rod; 55. Motor; 56. Shaft; 57. Conical ring frame; 58. First scraper; 59. Protrusion; 510. Connecting rod; 511. Ring; 512. Spring rod; 513. Second scraper; 514. Wear-resistant rod; 6. Cleaning assembly; 61. Rake plate; 62. Fan-shaped cover; 63. Material pipe; 64. Hollow ring; 65. Hose; 66. Pipe fitting; 67. Pump; 68. Round rod; 69. Rectangular cylinder; 610. Hole frame; 611. Rubber roller. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention.

[0020] Example 1:

[0021] The main structure of the acid wastewater treatment system is as follows: Figure 1The wastewater treatment unit 1 includes a neutralization tank 101, a sedimentation tank 102, and a clear water tank 103 arranged along the treatment process. A mixer 2 is installed in the neutralization tank 101 to thoroughly mix the quartz sand washing wastewater with neutralizing agents, defluorinating agents, or flocculants. The neutralized wastewater enters the sedimentation tank 102, where the sparingly soluble salts, metal hydroxides, fine quartz particles, and flocs generated by the reaction settle. The supernatant from the sedimentation tank 102 enters the clear water tank 103, and after further filtration or adjustment, it is discharged from the drain pipe 4 or reused in the quartz sand washing process.

[0022] The bottom or near the bottom of the sedimentation tank 102 is connected to the drain pipe 3. The drain pipe 3 is used to discharge settled sludge by a drain pump or gravity. To allow sludge to accumulate towards the inlet of the drain pipe 3, the bottom surface of the sedimentation tank 102 may be sloped towards the inlet of the drain pipe 3. The drain pipe 3 may be equipped with an inspection flange and an isolation valve for maintenance during initial installation and in case of extreme failure.

[0023] In this embodiment, the anti-clogging and cleaning mechanism is installed inside the sedimentation tank 102 and is coaxial or substantially coaxial with the inlet of the sewage pipe 3. During normal sewage discharge, the anti-clogging and cleaning mechanism retracts away from the inlet of the sewage pipe 3 to avoid significantly obstructing the flow of sludge; when unclogging is required, the anti-clogging and cleaning mechanism enters the sewage pipe 3 axially. This arrangement allows the unclogging operation to proceed from inside the sedimentation tank towards the sewage discharge direction without requiring the sewage pipe 3 to be disassembled from the outside.

[0024] Example 2:

[0025] Linear propulsion and rotary crushing structures, refer to Figures 2 to 4 The fixing frame 51 is installed on the bottom or side wall support of the sedimentation tank 102 using corrosion-resistant fasteners. An electric telescopic rod 52 is installed on the fixing frame 51. The telescopic direction of the electric telescopic rod 52 is parallel to the axis of the sewage pipe 3, and its telescopic end is connected to the cylinder 53. The fixing frame 51 may be equipped with guide rails, guide sleeves, or mutually parallel limiting rods to withstand the counter-torque generated during rotary crushing and prevent the cylinder 53 from rotating with the motor 55.

[0026] The cylinder 53 serves as an acid-resistant, sealed load-bearing component, forming an internal motor mounting cavity. The motor 55 can be a sealed geared motor, with its output end connected to the shaft 56. A hollow rod 54 is positioned at the center of the cylinder 53, through which the shaft 56 passes and is supported by bearings. A mechanical seal, a skeleton seal, or a combination seal is installed at the point where the shaft 56 exits the sealing cavity to prevent acidic wastewater from entering the motor mounting cavity. The hollow rod 54 not only protects the shaft 56 but also provides a fixed foundation for the rake plate 61.

[0027] The front end of the shaft 56 is fixedly connected to the conical ring frame 57. The small end of the conical ring frame 57 faces the inside of the drain pipe 3, so that when the mechanism advances, it first contacts the blockage at the small end, and then gradually expands the crushing cross section as the advancing depth increases. Multiple first scrapers 58 are arranged at intervals around the circumference of the conical ring frame 57. The first scrapers 58 can be arranged inclined along the generatrix of the cone, and their welcoming edges form crushing blades. The surface of the first scraper 58 is provided with protrusions 59, which can be toothed, pyramidal, or hemispherical, for applying concentrated impact to hard crystals.

[0028] In one embodiment, the inner diameter of the drain pipe 3 is 80-200 mm, the maximum outer diameter of the conical ring frame 57 is 5-20 mm smaller than the inner diameter of the drain pipe 3, the operating speed of the motor 55 is 100-800 r / min, and the advancing speed of the electric telescopic rod 52 is 5-50 mm / s. These parameters can be adjusted according to the hardness of the blockage, the material of the drain pipe, and the pipe diameter, and are not intended to limit the invention.

[0029] Example 3:

[0030] Flexible wall-mounted scraping structure, refer to Figures 5 to 8 The rear side of the conical ring frame 57 is fixedly connected to the circular ring 511 via multiple connecting rods 510, allowing the circular ring 511 to rotate synchronously with the shaft 56. Multiple spring rods 512 are arranged circumferentially on the circular ring 511. The spring rods 512 can be formed by a combination of sleeves, compression springs, and telescopic rods, or they can be flexible bending rods; their direction of action is mainly radial to the drain pipe 3.

[0031] Each spring rod 512 is connected to a second scraper 513 at its outer end. The second scraper 513 is axially inclined relative to the drain pipe 3, so that the scraped material has a component force that moves it towards the rearward collection area during rotation. A wear-resistant rod 514 is provided on the outer edge of the second scraper 513. The wear-resistant rod 514 can be made of hard alloy, wear-resistant ceramic, or surface-hardened metal. The preload of the spring rod 512 ensures that the wear-resistant rod 514 can still adhere to the pipe wall even when there are tolerances in the pipe diameter, uneven scale thickness on the pipe wall, or slight eccentricity of the mechanism.

[0032] The first scraper 58 and the second scraper 513 are arranged axially back and forth and offset circumferentially. The first scraper 58 first cuts open the center of the blockage and forms fragments, and the second scraper 513 then peels off the residual layer on the pipe wall. Compared with the blockage removal method of drilling only a hole in the center, this structure can restore a larger effective flow area.

[0033] Example 4:

[0034] Secondary shearing and negative pressure slag discharge structure, refer to Figures 3 to 7Multiple rake plates 61 are fixed to the front of the cylinder 53 or hollow rod 54 and arranged at intervals around the hollow rod 54. The rake plates 61 have strip-shaped teeth or strip-shaped gaps. Multiple round rods 68 are provided on the connecting rod 510 or the ring 511. The round rods 68 rotate with the conical ring frame 57, and their rotation trajectory passes through the area between adjacent rake plates 61. After the material crushed by the first scraper 58 and stripped by the second scraper 513 enters the vicinity of the rake plates 61, the rotating round rods 68 push the material towards the fixed rake plates 61, and the relative motion forms shear, further reducing the size of the material.

[0035] Multiple sector-shaped covers 62 are arranged circumferentially around the rear side of the rake plate 61 along the cylinder 53. Each sector-shaped cover 62 has an opening facing the shearing area of ​​the rake plate 61 and the round rod 68. The sector-shaped covers 62 are connected to a hollow ring 64 via a material pipe 63. The hollow ring 64 is an annular material collection chamber, and its outlet is connected to a pipe fitting 66 via a hose 65. The pipe fitting 66 is connected to the suction port of the pump 67. The hose 65 has a pre-reserved bending length to prevent the negative pressure passage from being broken or significantly flattened when the cylinder 53 reciprocates under the drive of the electric telescopic rod 52.

[0036] Pump 67 is preferably a corrosion-resistant slurry pump, a pneumatic diaphragm pump, or a sludge discharge pump with a large flow channel. The outlet of pump 67 is connected to an external sludge collection container or sludge thickening equipment. When clearing blockages, pump 67 is started first to create negative pressure at the fan-shaped shroud 62, and then motor 55 is started to advance the cylinder 53; this allows for immediate removal of debris after it is generated, reducing the likelihood of debris falling back into the sedimentation tank 102 or re-accumulating in the downstream section of the discharge pipe 3.

[0037] A removable grid can be installed at the opening of the fan-shaped shroud 62. The grid spacing should be greater than the target particle size after shearing by the round rod 68 and the rake plate 61, but smaller than the abnormally large particle size allowed to pass through the pump 67. A smooth transition is adopted between the material pipe 63 and the hollow ring 64 to avoid the formation of right-angle dead zones that are prone to material accumulation.

[0038] Example 5:

[0039] Rolling support and adapter structure, refer to Figure 4 and Figure 5 At least three rectangular tubes 69 are arranged around the outer periphery of the hollow ring 64, preferably evenly distributed along the circumference. A perforated frame 610 is inserted into each rectangular tube 69, and the perforated frame 610 has multiple positioning holes along its length. The extension length of the perforated frame 610 can be adjusted by passing bolts through the rectangular tube 69 and the different positioning holes. A rubber roller 611 is rotatably mounted on the outer end of the perforated frame 610.

[0040] Before use, adjust the perforated brackets 610 according to the inner diameter of the drain pipe 3 so that the rubber rollers 611 make light contact with the pipe wall after the mechanism enters the drain pipe 3. At least three rubber rollers 611 form multi-point support, which limits the radial displacement of the cylinder 53 and the shaft 56, while allowing the mechanism to move with low resistance along the axial direction of the drain pipe 3. The rubber rollers 611 can be coated with acid-resistant rubber, polyurethane, or fluororubber and are mounted via replaceable axle pins.

[0041] For straight sewage pipes, the electric telescopic rod 52 provides propulsion and retraction power; for sewage pipes with gentle bends, the electric telescopic rod 52 can be replaced with a flexible push rod, or a low-speed drive mechanism can be set at the rubber roller 611 to achieve auxiliary walking, but the basic working chain of rotary crushing, wall scraping, secondary shearing and negative pressure extraction remains unchanged.

[0042] Example 6:

[0043] During operation and unblocking, the quartz sand acid wastewater first enters the neutralization tank 101. Alkaline neutralizing agent, calcium source, flocculant or coagulant aid are added according to the wastewater composition. The mixer 2 mixes the agents with the wastewater. The reacted wastewater enters the sedimentation tank 102 for solid-liquid separation. The supernatant enters the clear water tank 103, and the sludge is discharged periodically through the sewage pipe 3.

[0044] When a decrease in sewage flow rate, abnormal negative pressure at the sewage pump inlet, or the preset maintenance cycle is detected, the sewage pump should be suspended or the downstream isolation valve of sewage pipe 3 should be closed, but the main neutralization and sedimentation process can continue to operate. Adjust the orifice frame 610 according to the inner diameter of sewage pipe 3 to ensure that the rubber roller 611 has an appropriate support preload.

[0045] First, start the pump 67 to establish negative pressure within the sector-shaped cover 62, material pipe 63, hollow ring 64, hose 65, and fitting 66. Then, start the motor 55 to synchronously rotate the shaft 56, conical ring frame 57, first scraper 58, connecting rod 510, circular ring 511, circular rod 68, and second scraper 513. The electric telescopic rod 52 pushes the cylinder 53 towards the inside of the drain pipe 3 at a low speed.

[0046] The small end of the conical ring frame 57 first contacts the blockage, and the first scraper 58 and protrusion 59 gradually break down the crystallized blocks and plated sludge; the second scraper 513 rotates along the wall under the action of the spring rod 512, peeling off the scale layer on the pipe wall. The debris is sheared again after entering the action area of ​​the rake plate 61 and the round rod 68, and then enters the fan-shaped hood 62 under negative pressure and is output through the slag discharge passage. The rubber roller 611 rolls along the pipe wall, providing radial support for the blockage removal mechanism.

[0047] Once the electric telescopic rod 52 reaches its set stroke, it can be kept rotating for a short time, or it can be retracted a certain distance before being pushed forward again to remove residual scale. After clearing the blockage, the electric telescopic rod 52 should be retracted to the back position, then the motor 55 should be stopped, and the pump 67 should be run for a delay of 10-60 seconds to remove any remaining debris from the hose 65 and hollow ring 64. Finally, the drain pipe 3 should be restored to normal sewage discharge.

[0048] This operating sequence ensures that suction begins before crushing starts and ends after crushing stops, preventing material from scattering during the initial clearing stage and preventing residual material from falling back into the pipeline after shutdown. The entire process does not require disassembling the drain pipe 3; only a short pause in the draining operation is needed, and the main acid wastewater treatment process does not require a complete shutdown.

[0049] Since quartz sand acid wastewater may contain residual inorganic acids and fluoride ions, the conical ring frame 57, first scraper 58, connecting rod 510, circular ring 511, second scraper 513, rake plate 61, fan-shaped cover 62, material pipe 63, and fasteners that come into contact with the wastewater can be made of acid-resistant stainless steel, nickel-based alloys, engineering plastics, or have a protective layer of polytetrafluoroethylene, polyvinylidene fluoride, rubber, or ceramic on the surface. The specific materials should be selected according to the type, concentration, temperature, and abrasive content of the wastewater.

[0050] The motor mounting cavity of cylinder 53 should adopt a combination structure of static seal and shaft end dynamic seal, and an acid-resistant cable sealing joint should be installed at the cable exit point. Pump 67 and electric telescopic rod 52 can be arranged above the design liquid level; if they need to enter the liquid environment due to installation space constraints, corrosion-resistant components with the appropriate protection level should be used.

[0051] The above description is merely a preferred embodiment of the present invention. Equivalent substitutions or conventional adjustments made by those skilled in the art to the driving form, number of scrapers, number of fan-shaped covers, materials, and connection methods without departing from the concept of the present invention should all fall within the protection scope of the present invention.

Claims

1. A quartz sand acid wastewater treatment device, comprising a wastewater treatment machine (1), wherein the wastewater treatment machine (1) includes a neutralization tank (101), a sedimentation tank (102), and a clear water tank (103), wherein the lower part of the sedimentation tank (102) is connected to a sewage pipe (3), characterized in that: An anti-clogging cleaning mechanism is provided in the sedimentation tank (102) at the position corresponding to the inlet end of the sewage pipe (3). The anti-clogging cleaning mechanism includes a fixed frame (51), a linear drive component, a cylindrical component (53), a rotary crushing component, and a negative pressure slag discharge component. The fixed frame (51) is located in the sedimentation tank (102). The linear drive component is located on the fixed frame (51) and connected to the cylindrical component (53), and is used to drive the cylindrical component (53) to reciprocate between the retracted position and the cleaning position along the axial direction of the sewage pipe (3). The rotary crushing assembly includes a motor (55), a shaft (56), a conical ring frame (57), and a plurality of first scrapers (58). The motor (55) is mounted on the cylinder (53) and is connected to the conical ring frame (57) via the shaft (56). The plurality of first scrapers (58) are spaced apart along the circumference of the conical ring frame (57). A ring (511) is connected to the rear side of the conical ring frame (57) via a plurality of connecting rods (510). A plurality of spring rods (512) are arranged along the circumference of the ring (511). The outer end of each spring rod (512) is connected to a second scraper (513) for elastically fitting against the inner wall of the sewage pipe (3). The negative pressure slag discharge assembly includes multiple fan-shaped hoods (62), multiple material pipes (63), a hollow ring (64), a hose (65), a pipe fitting (66), and a pump (67). The suction ports of the multiple fan-shaped hoods (62) face the rear material collection area of ​​the rotary crushing assembly. The multiple fan-shaped hoods (62) are respectively connected to the hollow ring (64) through the corresponding material pipes (63). The hollow ring (64) is connected to the pump (67) in sequence through the hose (65) and the pipe fitting (66) to extract the formed fragments while the rotary crushing assembly crushes the blockage and the second scraper (513) scrapes off the pipe wall deposits.

2. The quartz sand acid wastewater treatment device according to claim 1, characterized in that: The linear drive component is an electric telescopic rod (52). The fixed end of the electric telescopic rod (52) is installed on the fixed frame (51), and its telescopic end is connected to the cylindrical component (53). The fixed frame (51) is provided with a guide part parallel to the central axis of the sewage pipe (3). The cylindrical component (53) moves in a straight line under the restriction of the guide part.

3. The quartz sand acid wastewater treatment device according to claim 1, characterized in that: A hollow rod (54) is provided at the center of the cylindrical component (53), and the shaft (56) is rotatably inserted inside the hollow rod (54). An acid-resistant seal and a rotating support are provided between the shaft (56) and the hollow rod (54), and the motor (55) is located inside the sealing cavity of the cylindrical component (53).

4. The quartz sand acid wastewater treatment device according to claim 1, characterized in that: The small end of the conical ring frame (57) faces the interior of the sewage pipe (3), and a plurality of first scrapers (58) extend obliquely from the small end to the large end of the conical ring frame (57). The outer side of the first scraper (58) forms a crushing blade, and the crushing surface of the first scraper (58) is provided with a plurality of protrusions (59) to progressively cut and impact crush the crystal blocks and hardened sludge in the sewage pipe (3).

5. The quartz sand acid wastewater treatment device according to claim 1, characterized in that: Multiple spring rods (512) are evenly distributed around the circumference of the ring (511). The second scraper (513) is inclined relative to the axial direction of the drain pipe (3). A wear-resistant rod (514) is provided on the outer edge of the second scraper (513). The radial elastic force provided by the spring rods (512) keeps the wear-resistant rod (514) in contact with the inner wall of the drain pipe (3).

6. The quartz sand acid wastewater treatment device according to claim 1, characterized in that: The front part of the cylinder (53) is fixedly provided with a plurality of rake plates (61) around the hollow rod (54), and the rake plates (61) have strip-shaped gaps for the crushed material to pass through; a plurality of connecting rods (510) or the ring (511) are provided with round rods (68) that rotate synchronously with the shaft (56), and the rotation path of the round rods (68) passes through the area between adjacent rake plates (61) so that the round rods (68) and the rake plates (61) cooperate to form a secondary shearing structure.

7. The quartz sand acid wastewater treatment device according to claim 6, characterized in that: Multiple fan-shaped covers (62) are arranged circumferentially along the cylinder (53) and located on the rear side of the rake plate (61). The suction port of the fan-shaped cover (62) corresponds to the strip gap of the rake plate (61). The pump (67) is a corrosion-resistant slag discharge pump, and the minimum diameter of its flow channel is greater than the maximum particle size of the crushed material after being processed by the secondary shearing structure.

8. The quartz sand acid wastewater treatment device according to claim 1, characterized in that: The hollow ring (64) has at least three rectangular tubes (69) on its outer periphery. Each rectangular tube (69) is adjustablely fitted with a hole frame (610). A rubber roller (611) is rotatably mounted on the outer end of the hole frame (610). The hole frame (610) is locked by fasteners inserted into different holes, so that multiple rubber rollers (611) can be adjusted according to the inner diameter of the sewage pipe (3) and rolled and supported on the inner wall of the sewage pipe (3).

9. The quartz sand acid wastewater treatment device according to claim 1, characterized in that: The first scraper (58) and the second scraper (513) are spaced apart in the axial direction of the drain pipe (3) and staggered in the circumferential direction. When the anti-blocking cleaning mechanism is in the retracted position, the conical ring frame (57), the first scraper (58) and the second scraper (513) all exit the main drain channel of the drain pipe (3). When in the cleaning position, the first scraper (58) is located at the front end of the blockage and the second scraper (513) is located behind the first scraper (58) and adheres to the pipe wall.

10. The quartz sand acid wastewater treatment device according to any one of claims 1-9, characterized in that: The conical ring frame (57), the first scraper (58), the connecting rod (510), the circular ring (511), the second scraper (513), the rake plate (61), the fan-shaped cover (62), and the pipelines in contact with acidic wastewater are made of acid-resistant metal materials, acid-resistant non-metal materials, or have an acid-resistant and wear-resistant protective layer on the surface; the hose (65) is a flexible tube that is resistant to negative pressure, acid-resistant, and can compensate for the reciprocating displacement of the cylindrical part (53).

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