A resin wastewater treatment system

Abstract

This invention relates to the field of resin production industrial wastewater treatment technology, specifically to a resin wastewater treatment system. The system includes a treatment tank with slag outlets at both ends along its length, and inclined guide plates at the slag outlets. An installation bracket is located at the upper end of the treatment tank, and an installation box is slidably mounted on the bracket. A strip-shaped through-hole is located at the bottom of the installation box, and a scraper is slidably mounted thereon. The scraper is used to scrape resin scum from the treatment tank to the slag outlets. An adjustment mechanism for adjusting the scraper height is located at the installation box. This invention can precisely control the immersion depth of the scraper according to the thickness of the slag layer, ensuring effective slag removal while avoiding the problem of excessive scraper immersion causing agitation of the lower water layer and breaking up air bubbles and flocs. This ensures the stable operation of the flotation separation system and reduces fluctuations in effluent quality caused by slag scraping operations.

Description

Technical Field

[0001] This invention relates to the field of industrial wastewater treatment technology in resin production, and more specifically, to a resin wastewater treatment system. Background Technology

[0002] Synthetic resins (including ASA resin, epoxy resin, acrylic resin, etc.) are core basic materials in the chemical industry. Their production process generates large amounts of high-concentration organic wastewater. This type of wastewater is characterized by high organic content, strong emulsification, high suspended solids concentration, high viscosity, and poor biodegradability. Direct discharge without effective treatment will cause serious water pollution and violate relevant environmental regulations. Therefore, it must undergo systematic treatment to meet standards before discharge or reuse in production. Among mature resin wastewater treatment processes, pressure dissolved air flotation is the most widely used core pretreatment step. It uses microbubbles released under high pressure to combine with suspended flocs, emulsified oils, and colloidal pollutants in the wastewater, forming a scum layer with a density less than water that floats to the surface. The scum is then scraped off by a skimming system, achieving efficient solid-liquid separation and significantly reducing the organic and toxic loads of subsequent biochemical treatment processes. This is a key core link in ensuring the overall treatment effect of resin wastewater.

[0003] Currently, the mainstream scum removal system for resin wastewater flotation processes adopts a chain-type unidirectional scum removal structure. This system uses a closed-loop chain to drive a fixed scraper in a unidirectional circulating motion, scraping the scum from the surface of the tank to a single-end outlet for centralized discharge. However, in actual resin wastewater treatment conditions, this type of existing equipment suffers from a series of intractable technical defects. The scrapers in existing scum removal machines are mostly fixed, making it impossible to adjust the immersion depth of the scrapers in real time according to changes in the thickness of the scum layer on the tank surface. The thickness of the scum layer in resin wastewater varies significantly with resin production load, influent water quality fluctuations, and changes in reagent dosage. If the scraper immerses too deeply, it directly agitates the lower water layer, breaking up the fragile "bubble and floc" structure of the resin wastewater, causing the scum to re-sink into the water, rendering the flotation separation system completely ineffective. If the scraper immerses too deeply, it cannot completely remove the scum layer, resulting in scum residue and ultimately causing excessive SS and COD levels in the effluent, directly impacting subsequent biological treatment systems. Meanwhile, if the height of the existing fixed scraper needs to be adjusted, the equipment must be stopped and disassembled for manual operation, which cannot be adjusted online in real time, seriously affecting the continuous and stable operation of the resin wastewater treatment system. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution.

[0005] A resin wastewater treatment system includes a treatment tank with slag outlets at both ends along its length and inclined guide plates at the slag outlets. An installation bracket is provided at the upper end of the treatment tank, and an installation box is slidably mounted on the bracket. A strip-shaped through-hole is provided at the bottom end of the installation box, and a scraper is slidably mounted on the through-hole. The scraper is used to scrape resin sludge from the treatment tank to the slag outlets. An adjustment mechanism for adjusting the height of the scraper is provided at the installation box.

[0006] As a preferred embodiment of the present invention, the two ends of the treatment tank along its length are respectively provided with an inlet pipe for sending resin wastewater into the treatment tank and a drain pipe for discharging wastewater from the treatment tank. The end of the treatment tank where the inlet pipe is located is also provided with a reagent addition pipe that communicates with the treatment tank and is used to add reagents to the treatment tank.

[0007] As a preferred embodiment of the present invention, the upper end of the mounting box is provided with a cover plate for sealing the mounting box, the mounting bracket is provided with a set of slide rails, and the cover plate is provided with a slider that cooperates with the set of slide rails.

[0008] As a preferred embodiment of the present invention, a lead screw is rotatably provided in the mounting bracket, a lead screw motor for driving the lead screw to rotate is provided at one end of the mounting bracket, and a lead screw nut seat that cooperates with the lead screw to drive the mounting box to move is provided at the cover plate.

[0009] As a preferred embodiment of the present invention, the cover plate is provided with a cover plate through hole, the adjustment mechanism includes a sliding column provided at the cover plate through hole, the adjustment mechanism also includes a push rod mounting bracket provided at the cover plate, the push rod mounting bracket is provided with an electric push rod, the end of the sliding column extending out of the mounting box through the cover plate through hole is connected to the end of the piston rod of the electric push rod, the end of the sliding column extending into the mounting box through the cover plate through hole is provided with an eccentric block, the upper end of the scraper is provided with two stops, the two stops are spaced apart along the height direction of the scraper, the two stops and the scraper form a groove that fits with the eccentric block with a clearance, the end of the eccentric block can extend into the groove to drive the scraper to move.

[0010] As a preferred embodiment of the present invention, the number of strip-shaped through holes at the bottom end face of the mounting box is two, the scrapers at the two strip-shaped through holes are arranged opposite to each other, and the mounting box is provided with a rotation mechanism that drives the sliding column to rotate so that the eccentric block of the sliding column cooperates with the groove at one of the two scrapers.

[0011] As a preferred embodiment of the present invention, a strip-shaped groove is provided on the side wall of the sliding column, the strip-shaped groove being arranged along the axial direction of the sliding column; a driven gear is provided on the cover plate, which is sleeved on the sliding column and has a clearance fit with the sliding column; a gear protrusion is provided on the inner ring of the driven gear, which has a clearance fit with the strip-shaped groove to drive the sliding column to rotate; a motor mounting bracket is also provided on the cover plate; a switching motor is provided on the motor mounting bracket; a driving gear that meshes with the driven gear is provided on the rotating shaft of the switching motor; a first connecting flange is provided at the end of the electric push rod piston rod; a second connecting flange is provided at the end of the sliding column near the piston rod; and a rotary joint is provided between the first connecting flange and the second connecting flange.

[0012] As a preferred embodiment of the present invention, a guide post is provided on one side of the scraper at the bottom end face of the mounting box, a scraper protrusion is provided at the top end of the scraper, a guide hole is provided at the scraper protrusion to fit with the guide post, the guide post passes through the guide hole, and a spring is sleeved on the guide post for retracting the scraper into the mounting box.

[0013] As a preferred embodiment of the present invention, the installation box is provided with an inlet pipe and an outlet pipe communicating with the installation box at both ends along the width direction of the processing box body. Solenoid valves are provided at both the inlet pipe and the outlet pipe. The inlet pipe is used to transport the cleaning agent into the installation box, and the outlet pipe is used to discharge the cleaning agent from the installation box.

[0014] As a preferred embodiment of the present invention, a sludge discharge chamber is provided at both ends of the reaction chamber near the inlet pipe and the outlet pipe.

[0015] The beneficial effects of this invention are as follows:

[0016] 1. This invention uses an electric push rod-driven adjustment mechanism to adjust the height of the scraper in real time during equipment operation without stopping the machine or disassembling the equipment. It adapts to the dynamic changes in the thickness of the resin wastewater scum layer with production load and water quality fluctuations. The immersion depth of the scraper can be precisely controlled according to the thickness of the scum layer, which can ensure effective removal of scum while avoiding the problem of the scraper immersing too deeply and stirring the lower water layer, breaking the combination of air bubbles and flocs. This ensures the stable operation of the air flotation separation system and reduces the fluctuation of effluent water quality caused by scum scraping operations.

[0017] 2. All the operating components of this invention are integrated into a sealed installation box, which reduces the direct contact between the corrosive gases and high humidity water vapor from the resin wastewater and the transmission components, reduces the probability of component corrosion and wear, extends the service life of the equipment, and reduces the frequency of equipment failure and downtime and maintenance workload.

[0018] 3. This invention effectively alleviates the vicious cycle problem of scraper carrying scum back during operation by retracting the scraper on its return stroke. Through the control of the adjustment mechanism, the scraper can be completely retracted into the mounting box during the non-scum-scraping return stroke, preventing contact with the liquid surface and scum. This avoids the problem of existing scraper systems carrying back highly viscous scum during the return stroke, thus reducing secondary pollution from scum and further improving the solid-liquid separation effect of air flotation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the resin wastewater treatment system in Example 1;

[0020] Figure 2 This is a longitudinal sectional view of the resin wastewater treatment system in Example 1;

[0021] Figure 3 This is a cross-sectional view of the resin wastewater treatment system in Example 1;

[0022] Figure 4 This is a schematic diagram of the mounting box and adjustment mechanism in Example 1;

[0023] Figure 5 This is an exploded view of the mounting box structure in Example 1;

[0024] Figure 6 This is a schematic diagram of the sliding column in Example 1;

[0025] Figure 7 This is a schematic diagram of the scraper structure in Example 1;

[0026] Figure 8 This is an exploded view of the adjustment mechanism in Example 1.

[0027] The attached figures are labeled as follows:

[0028] 110. Processing tank; 120. Guide plate; 130. Mounting bracket; 140. Mounting box; 150. Slide rail; 160. Lead screw; 170. Lead screw motor; 210. Slag outlet; 220. Strip-shaped through hole; 230. Scraper; 240. Water inlet pipe; 250. Drain pipe; 260. Chemical addition pipe; 310. Liquid inlet pipe; 320. Liquid outlet pipe; 330. Solenoid valve; 340. Sewage discharge chamber; 410. Cover plate; 420. Slider; 430. Lead screw nut seat; 440. Sliding column ; 450, Push rod mounting bracket; 460, Electric push rod; 470, Driven gear; 480, Motor mounting bracket; 490, Switching motor; 510, Cover plate through hole; 520, Guide post; 530, Spring; 610, Eccentric block; 620, Strip groove; 630, First connecting flange; 710, Stop block; 720, Slot; 730, Scraper protrusion; 740, Guide hole; 810, Gear protrusion; 820, Drive gear; 830, Second connecting flange; 840, Rotary joint. Detailed Implementation

[0029] To further understand the content of this invention, a detailed description of the invention will be provided in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments are merely illustrative and not limiting of the invention.

[0030] Example 1, as Figure 1-8 As shown, this embodiment provides a resin wastewater treatment system. This system is mainly used in the air flotation solid-liquid separation process of industrial wastewater during the production of synthetic resins. It is adaptable to the scraping operation of highly viscous scum from resin wastewater and allows online adjustment of scraping operation parameters. The system includes a treatment tank 110, which serves as the main reaction chamber for air flotation treatment. Both ends of the treatment tank 110 along its length are provided with scum outlets 210. Inclined guide plates 120 are fixed at the scum outlets 210, which smoothly guide the scraped scum to an external scum collection device. Both ends of the treatment tank 110 along its length are respectively provided with an inlet pipe 240 and a drain pipe 250. The inlet pipe 240 continuously feeds the resin wastewater to be treated into the treatment tank 110, and the drain pipe 250 discharges the clear water from the treatment tank 110 after solid-liquid separation to subsequent treatment processes. A chemical addition pipe 260 is also provided at one end of the treatment tank 110 near the inlet pipe 240. The chemical addition pipe 260 is connected to the internal cavity of the treatment tank 110 and is used to add water treatment agents such as flocculants and demulsifiers required for wastewater treatment into the treatment tank 110. Sewage discharge chambers 340 are provided at both ends of the treatment tank 110 along its length. The sewage discharge chambers 340 are isolated from the wastewater treatment area of ​​the treatment tank 110 and are used to collect the waste liquid generated by the cleaning scraper and discharge the waste liquid into the treatment system.

[0031] A mounting bracket 130 is fixedly installed at the upper end of the processing box 110, and the mounting bracket 130 extends along the entire length of the processing box 110. A mounting box 140 is slidably installed at the mounting bracket 130. The mounting box 140 is a sealed cavity structure with an opening at the lower end. A cover plate 410 is detachably fixed at the upper end of the mounting box 140, and the cover plate 410 is used to seal and protect the upper opening of the mounting box 140. A set of parallel slide rails 150 is fixed on the inner side of the mounting bracket 130. The extension direction of the slide rails 150 is consistent with the length direction of the processing box 110. A slider 420 that cooperates with the slide rails 150 is fixed on the lower end face of the cover plate 410. The slider 420 and the slide rails 150 slide in cooperation, providing stable guidance for the reciprocating movement of the mounting box 140 along the length direction of the processing box 110.

[0032] A lead screw 160 is rotatably mounted between the two inner sides of the mounting bracket 130. The axis of the lead screw 160 is parallel to the extension direction of the slide rail 150. A lead screw motor 170 is fixed to one end of the mounting bracket 130. The output shaft of the lead screw motor 170 is coaxially connected to the end of the lead screw 160 for driving the lead screw 160 to rotate in both directions around its own axis. A lead screw nut seat 430 is fixed to the upper end face of the cover plate 410. The lead screw nut seat 430 and the lead screw 160 form a threaded transmission engagement. When the lead screw 160 rotates, it can drive the cover plate 410 and the mounting box 140 to reciprocate along the extension direction of the slide rail 150 through the lead screw nut seat 430.

[0033] The bottom end of the mounting box 140 has a strip-shaped through hole 220. A scraper 230 is slidably mounted in the strip-shaped through hole 220. The lower end of the scraper 230 can pass through the strip-shaped through hole 220 and extend into the liquid surface of the treatment tank 110 to scrape the resin scum floating on the liquid surface of the treatment tank 110 to the corresponding scum outlet 210. The mounting box 140 is provided with an adjustment mechanism for online adjustment of the vertical height of the scraper 230 to adapt to scum layers of different thicknesses. When the scraper 230 is in the retracted state, its bottom end is located in the strip-shaped through hole 220, which can both block the strip-shaped through hole 220 to reduce the leakage of cleaning agents during the cleaning process and provide radial limit for the vertical movement of the scraper 230 to prevent the scraper from deviating and getting stuck.

[0034] In this embodiment, there are two strip-shaped through holes 220 on the bottom surface of the mounting box 140. The two strip-shaped through holes 220 are arranged parallel to each other along the length of the processing box 110, and the scrapers 230 at the two strip-shaped through holes 220 are arranged opposite each other. A rotating mechanism is also provided at the mounting box 140. The rotating mechanism is used to drive the sliding column 440 to rotate, so that the eccentric block 610 at the end of the sliding column 440 engages with the slot 720 at one of the two scrapers 230, thereby realizing the switching of the working scraper state. During normal operation of the system, only one scraper 230 is kept in continuous operation state, and the other scraper 230 is in standby and retracted state. The switching of the working state of the two scrapers is only performed when the working scraper needs to be cleaned.

[0035] The adjustment mechanism includes a sliding column 440, a push rod mounting bracket 450, and an electric push rod 460. A cover plate through hole 510 is provided at the center of the cover plate 410. The sliding column 440 is fitted into the cover plate through hole 510 with a clearance fit. The sliding column 440 can move vertically up and down along the axis of the cover plate through hole 510, and can also rotate around its own axis. The push rod mounting bracket 450 is fixedly installed on the upper end face of the cover plate 410. The electric push rod 460 is vertically fixedly installed on the push rod mounting bracket 450. The piston rod of the electric push rod 460 is arranged vertically downwards. The sliding column 440 extends through the cover plate through hole 510 and out of the upper end of the mounting box 140, connecting with the end of the piston rod of the electric push rod 460. An eccentric block 610 is fixed to the lower end of the sliding column 440, which extends into the mounting box 140 through the cover plate through hole 510. The eccentric block 610 can synchronously complete the lifting and rotating movements with the sliding column 440.

[0036] Two stops 710 are fixed at the upper end of the scraper 230. The two stops 710 are spaced up and down along the height direction of the scraper 230. The two stops 710 and the side wall of the scraper 230 form a groove 720. The groove 720 is in clearance fit with the eccentric block 610. The end of the eccentric block 610 can extend into the groove 720. When the sliding column 440 is raised and lowered, the scraper 230 is driven to move synchronously in the vertical direction through the eccentric block 610, so as to realize the adjustment of the height of the scraper 230.

[0037] A guide post 520 is fixed to the bottom surface of the mounting box 140. The guide post 520 is located on one side of the scraper 230, and its axis is arranged vertically. A scraper protrusion 730 is fixed to the top of the scraper 230. A guide hole 740 is provided at the scraper protrusion 730. The guide hole 740 is clearance-fitted with the guide post 520. The guide post 520 passes through the guide hole 740 to provide precise guidance for the vertical lifting and lowering movement of the scraper 230. A spring 530 is sleeved on the outside of the guide post 520. The upper and lower ends of the spring 530 abut against the bottom surface of the mounting box 140 and the upper surface of the scraper protrusion 730, respectively. The spring 530 provides a restoring force to pull the scraper 230 upward and retract it into the mounting box 140, ensuring that the bottom end of the scraper 230 can be stably stopped in the strip-shaped through hole 220 when it is retracted.

[0038] The rotating mechanism includes a driven gear 470, a switching motor 490, and a driving gear 820. A strip-shaped groove 620 is formed on the side wall of the sliding column 440, extending along the entire axial direction of the sliding column 440. The driven gear 470 is sleeved on the outer side of the sliding column 440, with a clearance fit. A gear protrusion 810 is fixed to the inner ring of the driven gear 470, and the gear protrusion 810 has a clearance fit with the strip-shaped groove 620, enabling the driven gear 470 to drive the sliding column 440 to rotate synchronously without restricting the vertical movement of the sliding column 440 along its own axis. The upper end face of the cover plate 410 is also fixed with a motor mounting bracket 480. The switching motor 490 is vertically fixed at the motor mounting bracket 480. The rotating shaft of the switching motor 490 is arranged downward in the vertical direction. The driving gear 820 is coaxially fixed at the rotating shaft of the switching motor 490. The driving gear 820 and the driven gear 470 mesh with each other to drive the driven gear 470 to rotate.

[0039] The piston rod end of the electric actuator 460 is fixed with a first connecting flange 630, and the upper end of the sliding column 440 near the piston rod is fixed with a second connecting flange 830. A rotary joint 840 is installed between the first connecting flange 630 and the second connecting flange 830. The rotary joint 840 is used to realize the rotational connection between the piston rod of the electric actuator 460 and the sliding column 440, so that the sliding column 440 can rotate freely relative to the piston rod of the electric actuator 460, and can also complete vertical lifting and lowering synchronously with the piston rod.

[0040] The mounting box 140 is equipped with an inlet pipe 310 and a drain pipe 320 at both ends along the width of the processing box 110. Both the inlet pipe 310 and the drain pipe 320 are connected to the internal cavity of the mounting box 140. Solenoid valves 330 are installed on both the inlet pipe 310 and the drain pipe 320 to control the opening and closing of the corresponding pipes. The inlet pipe 310 is used to deliver the cleaning agent into the cavity of the mounting box 140 to rinse the transmission components and scraper 230 inside the mounting box 140 and remove the scum attached to the scraper 230. The outlet end of the drain pipe 320 is set towards the end of the processing box 110. When the mounting box 140 moves to the corresponding end of the processing box 110, the drain pipe 320 can directly discharge the waste liquid after cleaning in the mounting box 140 into the corresponding drain chamber 340 for centralized discharge. When the system performs scraper cleaning, it first switches the scraper to be cleaned to the standby retracted state by switching the state, thus blocking the corresponding strip-shaped through hole 220. The other scraper is switched to the continuous operation state to ensure that the scum removal operation is not interrupted during the cleaning process, while ensuring the sealing of the cleaning chamber.

[0041] During use, the resin wastewater to be treated is continuously fed into the treatment tank 110 through the inlet pipe 240. At the same time, according to the fluctuation of the wastewater quality, flocculants, demulsifiers and other water treatment agents are quantitatively added into the treatment tank 110 through the agent addition pipe 260. The agents and wastewater are fully mixed and reacted in the treatment tank 110, which destabilizes the emulsified organic matter and suspended colloidal particles in the wastewater. Combined with the high-pressure microbubbles released by the air flotation system, scum with a density less than water is formed and floats to the liquid surface, completing the solid-liquid separation process. The treated clean water is discharged through the drain pipe 250 at the end of the treatment tank 110 and enters the subsequent biochemical treatment process.

[0042] When the piston rod of the electric push rod 460 extends or retracts, it drives the sliding column 440 to move vertically up and down along the axis of the cover plate through hole 510 via the rotary joint 840. The eccentric block 610 at the lower end of the sliding column 440 moves up and down synchronously with the sliding column 440. Since the end of the eccentric block 610 extends into the slot 720 of the scraper 230 in the working state, when the eccentric block 610 moves up and down, it will drive the scraper 230 to move up and down synchronously via the upper and lower stops 710, thereby accurately adjusting the depth of the lower end of the scraper 230 into the liquid surface to adapt to different thicknesses of scum layer.

[0043] During the lifting and lowering of the scraper 230, the guide hole 740 at the scraper protrusion 730 slides smoothly along the guide post 520, providing precise axial guidance for the movement of the scraper 230 and preventing radial offset or jamming of the scraper 230. At the same time, the spring 530 sleeved on the guide post 520 continuously applies an upward reset force to the scraper protrusion 730, ensuring that the inner wall of the slot 720 always keeps in close contact with the eccentric block 610, eliminating the fit gap and improving the accuracy and stability of the height adjustment of the scraper 230. When the eccentric block 610 moves upward, the spring force of the spring 530 can drive the scraper 230 to reset upward synchronously, smoothly retracting the scraper 230 into the mounting box 140, so that the bottom end of the scraper 230 stays in the strip-shaped through hole 220, which not only prevents the scraper 230 from contacting the liquid surface during the return stroke, but also effectively seals the strip-shaped through hole 220.

[0044] In this embodiment, when the resin wastewater treatment system is running, the eccentric block 610 is stably engaged with the slot 720 of one of the scrapers 230 by the rotating mechanism. The scraper 230 serves as the working scraper, and the other scraper 230 serves as the spare scraper. The scraper remains in a retracted state throughout the process, and the state is switched only when the working scraper needs to be cleaned. There is no need to switch frequently with the reciprocating stroke of the mounting box 140.

[0045] When the installation box 140 moves towards the slag discharge end of the processing box 110, the adjusting mechanism lowers the working scraper 230 into the slag layer on the liquid surface. During the movement of the installation box 140, the scraper 230 continuously pushes the slag on the liquid surface towards the slag discharge port 210. The slag is smoothly discharged to the external collection device through the guide plate 120, completing a single slag scraping operation. After the installation box 140 reaches the slag discharge end, the adjusting mechanism retracts the working scraper 230 into the strip-shaped through hole 220, and the screw motor 170 reverses, driving the installation box 140 to move towards the return end. During this process, the working scraper 230 remains in a retracted state and does not contact the liquid surface to prevent the slag adhering to the scraper from being carried back into the water. After the installation box 140 reaches the return end, the working scraper 230 is lowered again to perform the next slag scraping operation.

[0046] Through the above process, a single scraper 230 can complete the continuous slag scraping operation of the entire surface of the treatment tank 110 without frequent scraper switching, which greatly reduces the frequency of operation of the rotating and adjusting mechanisms and reduces equipment wear and the probability of failure.

[0047] The scraper operation state switch is triggered only when there is too much floating scum on the surface of the working scraper 230, affecting the scum scraping effect. When it is necessary to clean the currently working scraper 230, the scraper 230 is first smoothly retracted into the strip-shaped through hole 220 by the adjustment mechanism. Then, the switching motor 490 is started, driving the drive gear 820 to rotate, which drives the driven gear 470 to rotate through gear meshing transmission. The gear protrusion 810 of the inner ring of the driven gear 470 drives the sliding column 440 to rotate synchronously around its own axis through the strip-shaped groove 620, so that the eccentric block 610 at the end of the sliding column 440 rotates synchronously, disengaging from the original working scraper's slot 720 and rotating into the spare scraper's slot 720 to complete a stable engagement. After the engagement is completed, the adjustment mechanism drives the new working scraper to be lowered to the working position and put into continuous scum scraping operation. The original working scraper becomes the spare scraper to be cleaned, remains in the retracted state, and forms a blockage in the corresponding strip-shaped through hole 220.

[0048] The rotary joint 840 between the sliding column 440 and the piston rod of the electric push rod 460 enables relative rotation between them, preventing the rotational motion of the sliding column 440 from being transmitted to the electric push rod 460 and ensuring its stable operation. Simultaneously, the structure of the strip groove 620 extending axially along the sliding column 440 allows the gear protrusion 810 and the strip groove 620 to stably transmit rotational torque without restricting the axial lifting and lowering movement of the sliding column 440. This achieves independent operation of the scraper switching and height adjustment actions, without interference between them.

[0049] After the scraper state is switched, the scraper to be cleaned remains in a retracted and sealed state. The installation box 140 is moved to the corresponding end of the treatment box 110, so that the outlet end of the drain pipe 320 is aligned with the sewage discharge chamber 340. Then the cleaning process is started: the solenoid valve 330 at the inlet pipe 310 is opened, and the cleaning agent is delivered to the sealed cavity of the installation box 140 through the inlet pipe 310. Since the scraper to be cleaned blocks the strip-shaped through hole 220, the leakage of the cleaning agent from the strip-shaped through hole 220 is greatly reduced, ensuring the sealing of the cavity of the installation box 140. The cleaning agent can soak and rinse the eccentric block 610, guide column 520, spring 530, and the upper end of the scraper to be cleaned in the installation box 140 to remove the scum and corrosive media adhering to the components, and at the same time, complete the thorough cleaning of the scum adhering to the scraper surface.

[0050] After cleaning, the solenoid valve 330 at the drain pipe 320 is opened, and the cleaning waste liquid in the installation box 140 is directly discharged into the corresponding sludge chamber 340 through the drain pipe 320. The sludge chamber 340 then centrally discharges the waste liquid into the treatment system, preventing the cleaning waste liquid from entering the wastewater treatment area of ​​the treatment tank 110 and causing secondary water pollution. After the scraper has finished cleaning, it switches to standby mode. When the currently operating scraper needs cleaning, the next switch is executed. The entire process does not require stopping the scum removal operation, achieving simultaneous cleaning and scum removal.

[0051] During the online cleaning process, the scum adhering to the surface of the scraper 230 can be removed in real time, preventing the scum from accumulating in the gap between the scraper 230 and the strip-shaped through hole 220, further reducing the risk of jamming during the movement of the scraper 230; the return force of the spring 530 keeps the scraper 230 in a stable force state, reducing the shaking and deflection during the lifting and lowering of the scraper 230, and further improving the stability of the scraper operation.

[0052] The resin wastewater treatment system in this embodiment achieves the following technical effects through the above-described technical solution:

[0053] 1. In this embodiment, the resin wastewater treatment system uses an adjustment mechanism driven by an electric push rod 460 to adjust the height of the scraper 230 in real time during equipment operation without stopping the machine or disassembling the equipment. This adapts to the dynamic changes in the thickness of the resin wastewater scum layer as production load and water quality fluctuate. The immersion depth of the scraper 230 can be precisely controlled according to the thickness of the scum layer, which can ensure effective removal of scum while avoiding the problem of the scraper immersing too deeply and stirring the lower water layer, breaking the combination of air bubbles and flocs. This ensures the stable operation of the air flotation separation system and reduces the fluctuation of effluent water quality caused by scum scraping operations.

[0054] 2. Compared with the existing chain-type transmission structure, the resin wastewater treatment system in this embodiment adopts a transmission mechanism composed of a lead screw 160 and a slide rail 150. The core transmission components are all arranged above the treatment box 110, and the operation execution components are all integrated in the sealed installation box 140. This reduces the direct contact between the corrosive gases and high humidity water vapor volatilized from the resin wastewater and the transmission components, reduces the probability of component corrosion and wear, extends the service life of the equipment, and reduces the frequency of equipment failure and downtime and maintenance workload.

[0055] 3. The resin wastewater treatment system in this embodiment effectively alleviates the vicious cycle problem of scraper-carried sludge returning during operation by retracting the scraper during the return stroke. Through the control of the adjustment mechanism, the scraper 230 can be completely retracted into the mounting box 140 during the non-sludge-scraping return stroke, preventing contact with the liquid surface and sludge. This avoids the problem of existing scraper systems carrying back highly viscous sludge during the return stroke, which occurs during closed-loop operation, reducing secondary pollution from sludge and further improving the solid-liquid separation effect of air flotation.

[0056] 4. The resin wastewater treatment system in this embodiment, through its dual scraper switching design, can complete the online cleaning of the scraper 230 and the internal components of the mounting box 140 without stopping the scum removal operation. This promptly removes the highly viscous scum adhering to the scraper 230, avoiding problems such as scraper jamming and reduced scraping effect caused by scum scaling. The waste liquid after cleaning is directly discharged into the isolated sewage tank 340 through the drain pipe 320 for centralized discharge, preventing it from entering the treatment tank 110 and contaminating the wastewater to be treated and the treated clean water, thus ensuring the stability of the flotation treatment effect and the effluent quality. Compared with the existing equipment that requires shutdown and disassembly for cleaning, the resin wastewater treatment system in this embodiment is more suitable for the 24-hour continuous operation requirements of resin production enterprises.

[0057] In summary, the above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the present invention.

Claims

1. A resin wastewater treatment system, characterized in that: The system includes a processing tank (110), with slag outlets (210) at both ends along its length, and guide plates (120) inclined at the slag outlets (210); an installation bracket (130) is provided at the upper end of the processing tank (110), and an installation box (140) is slidably provided at the installation bracket (130). A strip-shaped through hole (220) is provided at the bottom end of the installation box (140), and a scraper (230) is slidably provided at the strip-shaped through hole (220). The scraper (230) is used to scrape the resin slag at the processing tank (110) to the slag outlet (210), and an adjustment mechanism is provided at the installation box (140) for adjusting the height of the scraper (230).

2. The resin wastewater treatment system according to claim 1, characterized in that: The treatment tank (110) is provided with an inlet pipe (240) for sending resin wastewater into the treatment tank (110) and a drain pipe (250) for discharging wastewater from the treatment tank (110) at both ends along its length. The end of the treatment tank (110) where the inlet pipe (240) is located is also provided with a reagent addition pipe (260) that is connected to the treatment tank (110) and is used to add reagents to the treatment tank (110).

3. The resin wastewater treatment system according to claim 1, characterized in that: The upper end of the mounting box (140) is provided with a cover plate (410) for sealing the mounting box (140), and a set of slide rails (150) is provided at the mounting bracket (130). The cover plate (410) is provided with a slider (420) that cooperates with the set of slide rails (150).

4. The resin wastewater treatment system according to claim 3, characterized in that: The mounting bracket (130) is equipped with a lead screw (160) that rotates in the bracket. One end of the mounting bracket (130) is equipped with a lead screw motor (170) that drives the lead screw (160) to rotate. The cover plate (410) is equipped with a lead screw nut seat (430) that cooperates with the lead screw (160) to drive the mounting box (140) to move.

5. The resin wastewater treatment system according to claim 3, characterized in that: The cover plate (410) is provided with a cover plate through hole (510). The adjustment mechanism includes a sliding column (440) provided at the cover plate through hole (510). The adjustment mechanism also includes a push rod mounting bracket (450) provided at the cover plate (410). An electric push rod (460) is provided at the push rod mounting bracket (450). The end of the sliding column (440) that extends out of the mounting box (140) through the cover plate through hole (510) is connected to the end of the piston rod of the electric push rod (460). The sliding column (440) passes through the cover plate through hole (510) and is connected to the end of the piston rod of the electric push rod (460). An eccentric block (610) is provided at the end of the plate through hole (510) that extends into the mounting box (140). Two stops (710) are provided at the upper end of the scraper (230). The two stops (710) are spaced apart along the height direction of the scraper (230). A groove (720) is formed between the two stops (710) and the scraper (230) to fit the eccentric block (610) with a clearance. The end of the eccentric block (610) can extend into the groove (720) to drive the scraper (230) to move.

6. The resin wastewater treatment system according to claim 5, characterized in that: The mounting box (140) has two strip-shaped through holes (220) at the bottom end face. The scrapers (230) at the two strip-shaped through holes (220) are arranged opposite to each other. The mounting box (140) is provided with a rotation mechanism that drives the sliding column (440) to rotate so that the eccentric block (610) of the sliding column (440) cooperates with the slot (720) at one of the two scrapers (230).

7. The resin wastewater treatment system according to claim 6, characterized in that: A strip-shaped groove (620) is provided on the side wall of the sliding column (440), the strip-shaped groove (620) is arranged along the axial direction of the sliding column (440), the cover plate (410) is provided with a driven gear (470) sleeved on the sliding column (440) and having a clearance fit with the sliding column (440), the inner ring of the driven gear (470) is provided with a gear protrusion (810) that has a clearance fit with the strip-shaped groove (620) to drive the sliding column (440) to rotate, and the cover plate (410) is also provided with a motor mount. The mounting bracket (480) is equipped with a switching motor (490), and the shaft of the switching motor (490) is equipped with a driving gear (820) that meshes with the driven gear (470); the end of the piston rod of the electric push rod (460) is equipped with a first connecting flange (630), and the end of the sliding column (440) near the piston rod is equipped with a second connecting flange (830). A rotary joint (840) is provided between the first connecting flange (630) and the second connecting flange (830).

8. The resin wastewater treatment system according to claim 7, characterized in that: The bottom end face of the mounting box (140) is provided with a guide post (520) located on one side of the scraper (230). The top end of the scraper (230) is provided with a scraper protrusion (730). The scraper protrusion (730) is provided with a guide hole (740) that is clearance-fitted with the guide post (520). The guide post (520) passes through the guide hole (740). A spring (530) for retracting the scraper (230) into the mounting box (140) is sleeved on the guide post (520).

9. A resin wastewater treatment system according to claim 6, characterized in that: The installation box (140) is provided with an inlet pipe (310) and a drain pipe (320) communicating with the installation box (140) at both ends along the width direction of the processing box (110). Solenoid valves (330) are provided at both the inlet pipe (310) and the drain pipe (320). The inlet pipe (310) is used to transport the cleaning agent to the installation box (140), and the drain pipe (320) is used to discharge the cleaning agent from the installation box (140).

10. A resin wastewater treatment system according to claim 9, characterized in that: The reaction chamber is equipped with a sludge discharge chamber (340) at both ends near the inlet pipe (310) and the outlet pipe (320).

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