Comprehensive wastewater multi-stage treatment device and process

Abstract

The invention relates to the technical field of comprehensive wastewater treatment, in particular to a comprehensive wastewater multi-stage treatment device and process. According to the technical scheme, the sewage treatment device comprises a main body structure, a primary filtering structure, a cleaning structure, a deslagging structure and a linkage structure, wherein the main body structure comprises a mounting frame and a treatment tank positioned in the mounting frame; the primary filtering structure comprises a rack, a conveying roller rotationally mounted in the rack, a motor fixedly arranged at the rear end of the rack, a sealing seat embedded in the inner walls of the rack and the treatment tank, a supporting net rotationally connected to the outer wall of the conveying roller in a sleeving manner, and a filtering net connected to the outer wall of the supporting net in a sleeving manner and rotationally mounted in the sealing seat; the cleaning structure comprises a mounting box, a nozzle communicated with the mounting box, and a receiving frame fixedly arranged above the treatment tank. By arranging the primary filtering structure and the cleaning structure, the problems that the interception rate of common fibers, plastic fragments and other key pollutants is insufficient when primary filtering is carried out through a grating, and the loss of subsequent equipment and the process burden are increased are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of comprehensive wastewater treatment, and particularly to a multi-stage treatment device and process for comprehensive wastewater. Background Art

[0002] Comprehensive wastewater treatment is the mixing of degreasing wastewater, sulfur-containing wastewater, chrome tanning wastewater and wastewater generated from other sections after pretreatment to form comprehensive wastewater. Comprehensive wastewater treatment is generally divided into primary treatment and secondary treatment. Primary treatment generally uses physicochemical treatment, and its structures are mostly composed of various grilles, screens, grit chambers, regulating tanks and sedimentation tanks, etc. Chemical mixing and flocculation treatments are more common. Currently, secondary treatment technologies mainly rely on biochemical methods. The more mature process applied in China is the oxidation ditch, and there are also applications of the SBR method, contact oxidation method, etc. and combinations of various methods.

[0003] When using a grille to conduct rough filtration on comprehensive wastewater, the internal pores of the grille are large, generally 20mm - 50mm, and it can only intercept large-sized solids. The interception rate of the grille for key pollutants such as common fibers and plastic fragments is insufficient, and the interception effect on solid substances is poor. A large amount of fine solids enter the subsequent process. Unintercepted flexible substances such as fibers and plastics are prone to winding the impeller of the submersible pump, resulting in an increase in subsequent aeration energy consumption. The low interception efficiency caused by the large pores of the coarse grille will significantly increase the burden on the subsequent process. For this reason, we propose a multi-stage treatment device and process for comprehensive wastewater to solve the existing problems. Summary of the Invention

[0004] The object of the present invention is to address the problems in the background art and propose a multi-stage treatment device and process for comprehensive wastewater.

[0005] To achieve the above object, the present invention provides the following technical solution: A multi-stage treatment device for comprehensive wastewater, including a main structure, a primary filtration structure, a cleaning structure, a slag discharge structure and a linkage structure. The main structure includes a mounting frame and a treatment tank located inside the mounting frame.

[0006] The primary filtration structure includes a frame fixed inside the treatment tank, symmetrically distributed conveying rollers rotatably installed inside the frame, a motor fixed at the rear end of the frame and whose output end is connected to the conveying rollers, a sealing seat embedded in the frame and the inner wall of the treatment tank, a support net whose inner wall is covered with a rubber pad and is rotatably sleeved on the outer wall of the conveying roller and rotatably installed inside the sealing seat, and a filter screen sleeved on the outer wall of the support net and rotatably installed inside the sealing seat.

[0007] The cleaning structure includes an installation box fixed inside the frame, two nozzles corresponding to the inner wall of the support net and communicating with the installation box, and a receiving frame fixed above the treatment tank and corresponding to the nozzles.

[0008] Preferably, a confluence box communicating with the treatment tank is arranged inside the lower end of the mounting frame, a diversion groove is arranged on one side of the upper end of the mounting frame, and a filtering surface is arranged on the side of the sealing seat facing the diversion groove. The filtered wastewater is collected to realize centralized treatment of the wastewater, which is convenient for the connection of subsequent multi-stage treatment processes. The diversion groove guides the comprehensive wastewater to be evenly transported to the treatment tank, avoiding direct impact of the wastewater on the filter screen and prolonging the service life of the filter screen. The filtering surface serves as the core filtering area of the primary filtering structure, and the comprehensive wastewater is filtered through this area.

[0009] Preferably, a top cover is arranged at the upper end of the receiving frame, a diversion surface is arranged on the inner wall of the lower end of the receiving frame, and through holes are arranged at equal intervals inside the diversion surface. The top cover prevents the airflow or solid objects sprayed by the nozzle from splashing, keeps the equipment clean, and reduces noise at the same time. The diversion surface guides the solid objects to flow to the lower position through the inclined surface design, avoiding accumulation and improving the slag discharge efficiency. The through holes allow the liquid carried in the solid objects to flow back to the treatment tank, reducing water resource waste and reducing the water content of the discharged slag at the same time.

[0010] Preferably, a conveying pipe is connected to one end of the receiving frame, a cleaning shaft is rotatably installed inside the conveying pipe, a helically distributed blade is sleeved on the outer wall of the cleaning shaft, a discharge pipe is connected and installed on one side of the lower end of the conveying pipe, and a pump housing is fixedly arranged in front of the mounting frame. The solid objects are discharged by means of screw conveyance to avoid blockage and realize continuous slag discharge. The solid objects are centrally discharged through the discharge pipe, which is convenient for subsequent treatment or disposal.

[0011] Preferably, a pump shaft is rotatably installed inside the pump housing, an impeller rotatably installed on the outer wall of the pump shaft is sleeved on the outer wall of the pump shaft, a filter element is arranged at the suction end of the pump housing, and an air pipe communicating with the installation box is arranged at the output end of the pump housing. The impeller and the pump shaft generate airflow through rotation to provide high-pressure gas for the nozzle, enhancing the cleaning effect of the filter screen. The filter element prevents impurities from entering the pump housing, protects the impeller and the pump shaft, and prolongs the service life of the equipment. The air pipe transports the airflow to the installation box to realize the directional distribution of the airflow and improve the cleaning efficiency.

[0012] Preferably, the linkage structure includes a driving shaft fixed at one end of the conveying roller, a first driving wheel is sleeved on the outer wall of the driving shaft, a first driven wheel with a radius smaller than that of the first driving wheel is sleeved on the outer wall of the pump shaft, and a first belt is sleeved on the outer walls of both the first driven wheel and the first driving wheel. The driving shaft and the first driving wheel drive the pump shaft through the rotation of the conveying roller to realize power transmission, reduce the number of motors, and reduce energy consumption. The first driven wheel and the first belt drive through speed reduction, so that the pump shaft rotates at an appropriate speed, ensuring that the impeller generates stable airflow and avoiding overload of the pump shaft at the same time.

[0013] Preferably, a second bearing bracket is provided at the upper end of the mounting frame, the driving shaft is rotatably mounted inside the second bearing bracket, a second driving wheel is sleeved on the outer wall of the driving shaft, and a second driven wheel with a radius greater than the second driving shaft is sleeved on the outer wall of the cleaning shaft. The second bearing bracket supports the driving shaft to ensure its stable rotation and improve the transmission efficiency. The second driving wheel and the second driven wheel drive the cleaning shaft through a reduction transmission, so that the shredded blade rotates at an appropriate speed to adapt to the output of solid matter and avoid excessive rotation causing equipment wear or blockage.

[0014] Preferably, a slag discharge structure is arranged above the mounting frame, and the slag discharge structure comprises a bearing bracket 1 which is symmetrically distributed and fixed on the upper end of the mounting frame, an extrusion shaft is rotatably installed inside the bearing bracket 1, a support plate is fixed above the bearing bracket 1, a sliding sleeve is embedded and installed inside the support plate, an impact rod is slidably installed inside the sliding sleeve, a rubber block is arranged at the lower end of the impact rod, a limiting ring is sleeved on the outer wall of the impact rod, a spring sleeved on the outer side of the impact rod is arranged between the limiting ring and the support plate, a connecting rod is arranged at one end of the limiting block, and a convex block is arranged below the connecting rod on the outer wall of the extrusion shaft. The extrusion shaft and the convex block drive the impact rod to vibrate the receiving frame by rotating the extrusion connecting rod, thereby preventing the accumulation of solids and improving the slag discharge efficiency. The spring and the limiting ring realize the resetting of the impact rod, thereby ensuring the continuity and stability of the vibration and reducing the influence of noise and vibration on the equipment. The bearing bracket 1 and the support plate support the extrusion shaft and the impact rod to ensure the stable operation of the slag discharge structure.

[0015] Preferably, a ball bearing is rotatably mounted on the lower end of the connecting rod, a synchronous wheel is sleeved on the outer wall of the driving shaft and the extrusion shaft, and a belt 3 is sleeved on the outer wall of the synchronous wheel. The ball bearing reduces the friction between the connecting rod and the protrusion, improves the transmission efficiency, and prolongs the service life of the equipment. The synchronous wheel and the belt 3 realize the synchronous rotation of the driving shaft and the extrusion shaft, ensure the coordinated operation of the slag discharge structure and the conveying roller, and improve the overall processing efficiency.

[0016] A comprehensive wastewater multi-stage treatment process, the steps of the comprehensive wastewater multi-stage treatment process are as follows:

[0017] S1: The comprehensive wastewater formed by mixing the pre-treated degreasing wastewater, sulfur-containing wastewater, tanning wastewater and wastewater generated in other sections is transported to the inside of the diversion trough, and is guided by the diversion trough to the inside of the treatment tank. The comprehensive wastewater is located on one side of the filtering surface and is filtered through the filtering surface of the self-circulating filter screen of the comprehensive wastewater. The pores inside the filter screen are small. During use, the inner wall of the filter screen is supported by the support net to improve the strength of the filter screen, and the comprehensive wastewater is subjected to primary fine filtration. Large-sized solids are intercepted at one end of the filter screen, and the filtered comprehensive wastewater is transported to the inside of the junction box;

[0018] S2: Meanwhile, since the comprehensive wastewater is initially filtered and most of the solid particulate matter inside the comprehensive wastewater is intercepted by the filter screen, the motor drives the conveying roller to rotate. While the conveying roller rotates, the support screen is driven to rotate by friction. The support screen is a flexible support screen with a rubber layer on the inner wall, and the outer wall of the conveying roller is also provided with a rubber layer. The flexible support screen rotates on the outer wall of the conveying roller through the friction of the rubber. Linked to this, the filter screen rotates. During the rotation of the filter screen, the pump housing sucks external gas through the air pipe into the installation box and acts on the inner wall of the filter screen through the nozzle, delivering the sprayed air flow from the inside to the outside. The solids intercepted on the outer wall of the filter screen and lifted following the rotation of the filter screen are sprayed into the receiving frame by the air flow, automatically cleaning the filter screen;

[0019] The solids inside the receiving frame are conveyed to a lower position through the inclined surface of the guiding surface. The solids are conveyed into the conveying pipe. At this time, the cleaning shaft rotates to drive the screw blade to rotate, and the screw blade conveys the solids. The solids are discharged through the conveying pipe connected to one side of the lower end of the conveying pipe. When the moisture inside the solids is conveyed through the guiding surface and passes through the through holes of the guiding surface, the liquid carried inside the solids flows downward and returns to the treatment pool, realizing the automatic cleaning of the intercepted solids;

[0020] S3: When the conveying roller rotates, it drives the driving roller shaft to rotate, and accordingly drives the driving wheel 1, driving wheel 2, and synchronous wheel on the outer wall to rotate. The driving wheel 1 drives the driven wheel 1 through the belt 1, driving the pump shaft to rotate. Since the radius of the driving wheel 1 is larger than that of the driven wheel 1, the driving wheel 1 plays a role in accelerating the driven wheel 1, and the driven wheel 1 drives the pump shaft to rotate at an accelerated speed, enabling the impeller to suck air flow to provide air flow for the nozzle to spray and clean the filter screen;

[0021] When the driving wheel 2 rotates, it drives the driven wheel 2 to rotate through the linkage of the belt 2, and then drives the cleaning shaft to rotate. Since the radius of the driving wheel 2 is smaller than that of the driven wheel 2, the transmission of the driving wheel 2 decelerates the driven shaft 2, and the cleaning shaft rotates at a reduced speed to adapt to the output volume of the solids and prevent the screw blade from rotating too fast;

[0022] The synchronous wheel drives the extrusion shaft to rotate through the synchronous belt 3. When the convex block on the outer wall of the extrusion shaft passes through the connecting rod, it presses the ball at the lower end of the connecting rod, and then applies an extrusion force to the limiting ring through the connecting rod. The limiting ring drives the impact rod to lift. The impact rod slides inside the support plate through the sliding sleeve while pressing the spring. When the convex block passes through the connecting rod, through the elastic force of the spring itself and the guidance of the elastic force of the spring by the limiting ring, the impact rod impacts the top cover, thereby realizing the vibration of the receiving frame, assisting the flow of the collected solids, and using a single high-power motor to drive the treatment structure, cleaning structure, and slag discharge structure through the linkage structure.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] 1. The filter screen inside the treatment tank of the present invention filters the passing comprehensive wastewater, intercepting small-sized object substances. Compared with the grid interception, it directly conducts fine filtration of the comprehensive wastewater, intercepting most of the solid substances.

[0025] 2. The filter screen, in cooperation with the support screen and the conveying rollers, constitutes a conveying structure. The filter screen is annular and can rotate, avoiding the use of some sections of the filter screen to filter the comprehensive wastewater, improving the filtering effect of the filter screen. At the same time, when the filter screen rotates, it cooperates with the internal nozzles to output high-pressure air flow, spraying and cleaning the solid substances intercepted on the filter screen and lifted with the filter screen from the inside to the outside. The intercepted solid substances enter the receiving frame for collection and further conveyance. The solid substances intercepted on the filter screen are cleaned, and the filter screen continues to rotate and be cleaned, avoiding the problems of shutdown cleaning and blockage, achieving efficient and stable primary filtration treatment of the sprayed comprehensive wastewater, reducing the burden on subsequent comprehensive wastewater treatment equipment. At the same time, large-sized solid substances are intercepted, reducing the loss of the treatment equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a top-down three-dimensional structural schematic diagram of the present invention;

[0027] Figure 2 is a side-view three-dimensional structural schematic diagram of the present invention;

[0028] Figure 3 is a front-view three-dimensional structural schematic diagram of the present invention;

[0029] Figure 4 is a main cross-sectional three-dimensional structural schematic diagram of the present invention;

[0030] Figure 5 is a top-down three-dimensional structural schematic diagram of the treatment tank of the present invention;

[0031] Figure 6 is of the present invention Figure 5 main cross-sectional three-dimensional structural schematic diagram;

[0032] Figure 7 is a side-view three-dimensional structural schematic diagram of the top cover of the present invention;

[0033] Figure 8 is a top-down cross-sectional three-dimensional structural schematic diagram of the top cover of the present invention;

[0034] Figure 9 is a rear-view three-dimensional structural schematic diagram of the linkage structure of the present invention;

[0035] Figure 10 is a main cross-sectional three-dimensional structural schematic diagram of the sealing seat of the present invention;

[0036] Figure 11 is a top-down three-dimensional structural schematic diagram of the slag discharge structure of the present invention;

[0037] Figure 12 Schematic side view three-dimensional structure diagram of the impact rod of the present invention;

[0038] Figure 13 Schematic front view three-dimensional structure diagram of the sealing seat of the present invention.

[0039] Reference numerals: 100, main body structure; 101, mounting rack; 102, treatment tank; 103, diversion groove;

[0040] 200, primary filtration structure; 201, frame; 202, motor; 203, conveying roller; 204, sealing seat; 205, filter screen; 206, filtering surface; 207, support screen;

[0041] 300, confluence box;

[0042] 400, cleaning structure; 401, receiving frame; 402, top cover; 403, diversion surface; 404, through hole; 405, cleaning shaft; 406, winding blade; 407, conveying pipe; 408, discharge pipe; 409, mounting box; 410, nozzle; 411, air pipe; 412, pump housing; 413, filter element; 414, pump shaft; 415, impeller;

[0043] 500, slag discharge structure; 501, support plate; 502, impact rod; 503, extrusion shaft; 504, convex block; 505, bearing bracket one; 506, sliding sleeve; 507, limiting ring; 508, rubber block; 509, spring; 510, connecting rod; 511, ball;

[0044] 600, linkage structure; 601, drive shaft; 602, bearing bracket two; 603, drive wheel one; 604, belt one; 605, driven wheel one; 606, drive wheel two; 607, belt two; 608, driven wheel two; 609, belt three; 610, synchronous wheel. Detailed implementation manners

[0045] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0046] As Figures 1-13 shown, a comprehensive wastewater multi-stage treatment device proposed by the present invention, Embodiment 1:

[0047] It includes a main body structure 100, a primary filtration structure 200, a cleaning structure 400, a slag discharge structure 500, and a linkage structure 600. The main body structure 100 includes a mounting frame 101 and a treatment tank 102 located inside the mounting frame 101;

[0048] The primary filtration structure 200 includes a frame 201 fixedly placed inside the treatment tank 102, symmetrically distributed conveying rollers 203 rotatably installed inside the frame 201, a motor 202 fixedly placed at the rear end of the frame 201 and with its output end connected to the conveying rollers 203, a sealing seat 204 embedded in the inner walls of the frame 201 and the treatment tank 102, a support net 207 with its inner wall covered by a rubber pad and rotatably sleeved on the outer wall of the conveying rollers 203 and rotatably installed inside the sealing seat 204, and a filter screen 205 sleeved on the outer wall of the support net 207 and rotatably installed inside the sealing seat 204;

[0049] The cleaning structure 400 includes an installation box 409 fixedly placed inside the frame 201, two nozzles 410 corresponding to and communicating with the inner walls of the support net 207, and a receiving frame 401 fixedly placed above the treatment tank 102 and corresponding to the nozzles 410;

[0050] A confluence box 300 communicating with the treatment tank 102 is arranged inside the lower end of the mounting frame 101. A diversion groove 103 is arranged on one side of the upper end of the mounting frame 101. A filtering surface 206 is arranged on the side of the sealing seat 204 facing the diversion groove 103;

[0051] A top cover 402 is arranged at the upper end of the receiving frame 401. A diversion surface 403 is arranged on the inner wall of the lower end of the receiving frame 401. Through holes 404 evenly distributed are arranged inside the diversion surface 403;

[0052] One end of the receiving frame 401 communicates with a conveying pipe 407. A cleaning shaft 405 is rotatably installed inside the conveying pipe 407. A helically distributed blade 406 is sleeved on the outer wall of the cleaning shaft 405. A discharge pipe 408 is communicated and installed on one side of the lower end of the conveying pipe 407. A pump housing 412 is fixedly placed in front of the mounting frame 101;

[0053] A pump shaft 414 is rotatably installed inside the pump housing 412. An impeller 415 rotatably sleeved on the outer wall of the pump shaft 414 is sleeved on the outer wall of the pump shaft 414. A filter element 413 is arranged at the suction end of the pump housing 412. An air pipe 411 communicating with the installation box 409 is arranged at the output end of the pump housing 412;

[0054] In this embodiment, the main structure 100, the primary filtration structure 200 and the cleaning structure 400 work together to achieve the primary treatment of sulfur-containing wastewater, chrome tanning wastewater and degreasing wastewater. The main structure 100, as the core framework, is composed of a mounting frame 101 welded by carbon steel and a fiberglass treatment tank 102. The mounting frame 101 is fixed to the ground by anchor bolts and can accommodate the comprehensive wastewater after mixing of multiple wastewater streams. A diversion trough 103 is welded to one side of the upper end of the mounting frame 101 to guide the mixed wastewater to the front end of the treatment tank 102;

[0055] The core of the primary filtration structure 200 is driven by a double conveying roller 203. The motor 202 can be used in cooperation with a reducer as needed to drive the conveying roller 203 through the reducer. The roller surface is covered with a 3-mm-thick nitrile rubber layer. The filter screen 205 is woven with 304 stainless steel wires with a pore diameter of 0.5 mm. The supporting net 207 sleeved on the outer layer is made of high-strength polyester fiber, and a 2-mm-thick silicone pad is attached to the inner wall. When the wastewater passes through the filtering surface 206 of the sealing seat 204, solid particles are intercepted on the surface of the filter screen 205, while the filtrate passes through the confluence box 300 and enters the next treatment unit;

[0056] The cleaning structure 400 utilizes the principle of pneumatic backwashing to achieve self-cleaning of the filter screen 205. The centrifugal fan in the pump housing 412 generates compressed air through the impeller 415 and transports it through the air pipe 411 to the annular nozzle 410 in the installation box 409. When the filter screen 205 rotates to the position corresponding to the nozzle 410, the nozzle 410 sprays air flow onto the inner wall of the filter screen 205 to peel off the attached particles. The peeled solid matter falls into the receiving frame 401 with a guiding surface 403. The aperture of its through hole 404 is 5 mm, so that most of the filtrate flows back to the treatment tank 102, and the solid matter slides down along the inclined surface into the conveying pipe 407, significantly reducing the subsequent biochemical treatment load. It avoids the problem that the large internal pores of the grille can only intercept large-sized solid objects, the interception rate of key pollutants such as common fibers and plastic fragments is insufficient, the interception effect of solid substances is poor, a large amount of fine solids enter the subsequent process, the un-intercepted flexible substances such as fibers and plastics are easy to entangle the impeller 415 of the submersible pump in the subsequent treatment equipment, and the aeration energy consumption increases due to the lifting of solid substances during aeration. At the same time, it avoids the problem that the low interception efficiency caused by the large pores of the grille will significantly increase the burden of the subsequent process, and reduces the burden in the subsequent process.

[0057] Embodiment Two:

[0058] Above the mounting bracket 101, a slag discharging structure 500 is provided. The slag discharging structure 500 includes bearing brackets one 505 that are symmetrically distributed and fixedly arranged at the upper end of the mounting bracket 101. An extrusion shaft 503 is rotatably installed inside the bearing brackets one 505. Above the bearing brackets one 505, a support plate 501 is fixedly arranged. A sliding sleeve 506 is embedded and installed inside the support plate 501. An impact rod 502 is slidably installed inside the sliding sleeve 506. A rubber block 508 is arranged at the lower end of the impact rod 502. A limit ring 507 is sleeved on the outer wall of the impact rod 502. A spring 509 sleeved on the outer side of the impact rod 502 is arranged between the limit ring 507 and the support plate 501. One end of the limit block is provided with a connecting rod 510. A convex block 504 located below the connecting rod 510 is arranged on the outer wall of the extrusion shaft 503;

[0059] A ball 511 is rotatably installed at the lower end of the connecting rod 510;

[0060] In this embodiment, the slag discharging structure 500 is composed of an extrusion shaft 503 and an impact vibration device. A tungsten carbide coating is sprayed on the surface of the extrusion shaft 503. The vibration slag discharging mechanism adopts the cam drive principle. Every time the eccentric convex block 504 at the end of the drive shaft 601 rotates one week, the connecting rod 510 is pushed to rise through the ball 511 bearing, so that the impact rod 502 impacts the top cover 402. The vibration energy is transmitted to the receiving frame 401 through the support plate 501 to generate vibration, effectively preventing sludge from accumulating on the diversion surface 403.

[0061] Embodiment Three:

[0062] The linkage structure 600 includes a drive shaft 601 fixedly arranged at one end of the conveying roller 203. A drive wheel one 603 is sleeved on the outer wall of the drive shaft 601. A driven wheel one 605 with a radius smaller than that of the drive wheel one 603 is sleeved on the outer wall of the pump shaft 414. A belt one 604 is sleeved on the outer walls of both the driven wheel one 605 and the drive wheel one 603;

[0063] A bearing bracket two 602 is arranged at the upper end of the mounting bracket 101. The drive shaft 601 is rotatably installed inside the bearing bracket two 602. A drive wheel two 606 is sleeved on the outer wall of the drive shaft 601. A driven wheel two 608 with a radius larger than that of the drive shaft 601 two is sleeved on the outer wall of the cleaning shaft 405;

[0064] Synchronization wheels 610 are sleeved on the outer walls of both the drive shaft 601 and the extrusion shaft 503. A belt three 609 is sleeved on the outer walls of the synchronization wheels 610;

[0065] In this embodiment, the 5.5 kW main motor 202 drives the drive shaft 601 through a coupling. The first drive wheel 603 mounted thereon drives the first driven wheel 605 to rotate through the first belt 604, increasing the rotational speed of the pump shaft 414 to meet the air supply demand of the impeller 415. The second drive wheel 606 drives the second driven wheel 608 to rotate through the second belt 607, reducing the rotational speed of the cleaning shaft 405 to match the conveying speed of the screw blade 406 for solid material conveyance.

[0066] The drive shaft 601 is connected to the synchronous pulley 610 at the end of the extrusion shaft 503 through the third belt 609 to ensure that the rotational speed of the extrusion shaft 503 is strictly synchronized with that of the conveying roller 203. When the throughput fluctuates, the frequency converter adjusts the rotational speed of the main motor 202, and automatically compensates the speeds of each actuator through the transmission ratio of the belt group to maintain the dynamic balance of the system. It should be noted that the first drive wheel 603, the second drive wheel 606, the first driven wheel 605, the second driven wheel 608, and the synchronous pulley 610 are all toothed wheels, and the first belt 604, the second belt 607, and the third belt 609 are all toothed belts. This linkage structure 600 is more energy-efficient than the split drive scheme, reducing the usage cost and the maintenance cost of subsequent electrical equipment.

[0067] Embodiment 4:

[0068] A multi-stage comprehensive wastewater treatment process. The steps of the multi-stage comprehensive wastewater treatment process method are as follows:

[0069] S1: The comprehensive wastewater formed by mixing the pretreated degreasing wastewater, sulfur-containing wastewater, chrome tanning wastewater and the wastewater generated in other sections is transported into the diversion trough 103 and then guided by the diversion trough 103 into the treatment tank 102. The comprehensive wastewater is located on one side of the filter surface 206 and is filtered through the filter surface 206 of the filter screen 205 by the gravity flow of the comprehensive wastewater. The pores inside the filter screen 205 are small. During use, the inner wall of the filter screen 205 is supported by the support screen 207 to enhance the strength of the filter screen 205 for primary fine filtration of the comprehensive wastewater. Large-sized solid materials are intercepted at one end of the filter screen 205, and the filtered comprehensive wastewater is transported into the confluence box 300.

[0070] S2: Meanwhile, since the comprehensive wastewater is preliminarily filtered, most of the solid particles inside the comprehensive wastewater are intercepted by the filter screen 205. In coordination with this, the motor 202 drives the conveying roller 203 to rotate. While the conveying roller 203 rotates, it drives the support net 207 to rotate through friction. The support net 207 is a flexible support net 207 with a rubber layer on its inner wall, and the outer wall of the conveying roller 203 is also provided with a rubber layer. The friction of the rubber makes the flexible support net 207 rotate on the outer wall of the conveying roller 203. Linked to this, the filter screen 205 rotates. During the rotation of the filter screen 205, the pump housing 412 sucks in external gas through the air pipe 411 and enters the inside of the installation box 409, and acts on the inner wall of the filter screen 205 through the nozzle 410, delivering the jet airflow from the inside to the outside. The solids intercepted on the outer wall of the filter screen 205 and lifted while following the rotation of the filter screen 205 are ejected into the receiving frame 401 by the airflow, automatically cleaning the filter screen 205;

[0071] The solids inside the receiving frame 401 are conveyed to a lower position through the inclined surface of the guiding surface 403. The solids are conveyed into the inside of the conveying pipe 407. At this time, the cleaning shaft 405 rotates to drive the screw blade 406 to rotate. The screw blade 406 conveys the solids, and the solids are discharged through the conveying pipe 407 connected to one side of the lower end of the conveying pipe 407. When the moisture inside the solids is conveyed through the guiding surface 403 and passes through the through hole 404 of the guiding surface 403, the liquid carried inside the solids flows downward and returns to the inside of the treatment tank 102, realizing the automatic cleaning of the intercepted solids;

[0072] S3: When the conveying roller 203 rotates, it drives the driving roller to rotate, and accordingly drives the driving wheel one 603, the driving wheel two 606, and the synchronous wheel 610 on its outer wall to rotate. The driving wheel one 603 drives the driven wheel one 605 through the belt one 604, driving the pump shaft 414 to rotate. Since the radius of the driving wheel one 603 is larger than that of the driven wheel one 605, the driving wheel one 603 plays a role in accelerating the driven wheel one 605. The driven wheel one 605 drives the pump shaft 414 to rotate at an accelerated speed, enabling the impeller 415 to suck in airflow and providing airflow for the nozzle 410 to spray and clean the filter screen 205;

[0073] When the driving wheel two 606 rotates, it drives the driven wheel two 608 to rotate through the linkage of the belt two 607, and then drives the cleaning shaft 405 to rotate. Since the radius of the driving wheel two 606 is smaller than that of the driven wheel two 608, the transmission of the driving wheel two 606 decelerates the driven shaft two, and the cleaning shaft 405 rotates at a reduced speed, adapting to the output volume of the solids and preventing the screw blade 406 from rotating too fast;

[0074] The synchronous pulley 610 drives the extrusion shaft 503 to rotate through the synchronous belt three 609. When the bump 504 on the outer wall of the extrusion shaft 503 passes through the connecting rod 510, it presses the ball 511 at the lower end of the extrusion connecting rod 510, and then applies an extrusion force to the limiting ring 507 through the connecting rod 510. The limiting ring 507 drives the impact rod 502 to lift. While the impact rod 502 slides inside the support plate 501 through the sliding sleeve 506, it pressurizes the spring 509. When the bump 504 passes through the connecting rod 510, driven by the elastic force of the spring 509 itself and the guidance of the elastic force of the spring 509 by the limiting ring 507, the impact rod 502 impacts the top cover 402, thereby realizing the vibration of the receiving frame 401, assisting the flow of solid matter collection, and the use of the processing structure, the cleaning structure 400, and the slag discharging structure 500 is driven by a single high-power motor 202 through the linkage structure 600.

[0075] The above specific embodiments are only several preferred embodiments of the present invention. Based on the technical solution of the present invention and the relevant inspirations of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

[0076] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A multi-stage treatment device for comprehensive wastewater, comprising a main body structure (100), a primary filtration structure (200), a cleaning structure (400), a slag discharging structure (500) and a linkage structure (600), characterized in that: The main body structure (100) includes a mounting frame (101) and a treatment tank (102) located inside the mounting frame (101); The primary filtration structure (200) includes a frame (201) fixedly disposed inside the treatment tank (102), conveying rollers (203) symmetrically distributed and rotatably mounted inside the frame (201), a motor (202) fixedly disposed at the rear end of the frame (201) and having an output end connected to the conveying rollers (203), a sealing seat (204) embedded in the inner walls of the frame (201) and the treatment tank (102), a support mesh (207) whose inner wall is covered with a rubber pad and is rotatably sleeved on the outer wall of the conveying rollers (203) and rotatably mounted inside the sealing seat (204), and a filter screen (205) sleeved on the outer wall of the support mesh (207) and rotatably mounted inside the sealing seat (204); The cleaning structure (400) includes a mounting box (409) fixedly disposed inside the frame (201), nozzles (410) communicating with the mounting box (409) and corresponding to the inner walls of the two support meshes (207), and a receiving frame (401) fixedly disposed above the treatment tank (102) and corresponding to the nozzles (410).

2. The integrated wastewater multi-stage treatment device according to claim 1, characterized in that: A confluence box (300) communicating with the treatment tank (102) is disposed inside the lower end of the mounting frame (101), a diversion groove (103) is disposed on one side of the upper end of the mounting frame (101), and a filtering surface (206) is disposed on the surface of the sealing seat (204) facing the diversion groove (103).

3. The integrated wastewater multi-stage treatment device according to claim 1, characterized in that: A top cover (402) is disposed at the upper end of the receiving frame (401), a diversion surface (403) is disposed on the inner wall of the lower end of the receiving frame (401), and through holes (404) equally distributed are formed inside the diversion surface (403).

4. An integrated wastewater multi-stage treatment device according to claim 1, characterized in that: One end of the receiving frame (401) is communicated with a conveying pipe (407), a cleaning shaft (405) is rotatably mounted inside the conveying pipe (407), a helically distributed blade (406) is sleeved on the outer wall of the cleaning shaft (405), a discharge pipe (408) is communicated and installed on one side of the lower end of the conveying pipe (407), and a pump housing (412) is fixedly disposed in front of the mounting frame (101).

5. The integrated wastewater multi-stage treatment device according to claim 4, wherein: A pump shaft (414) is rotatably mounted inside the pump housing (412), an impeller (415) rotatably sleeved on the outer wall of the pump shaft (414) is sleeved on the outer wall of the pump shaft (414), a filter element (413) is disposed at the suction end of the pump housing (412), and an air pipe (411) communicating with the mounting box (409) is disposed at the output end of the pump housing (412).

6. The integrated wastewater multi-stage treatment device according to claim 5, characterized in that: The linkage structure (600) includes a driving shaft (601) fixedly disposed at one end of the conveying roller (203), a first driving wheel (603) sleeved on the outer wall of the driving shaft (601), a first driven wheel (605) sleeved on the outer wall of the pump shaft (414) and having a radius smaller than that of the first driving wheel (603), and a first belt (604) sleeved on the outer walls of both the first driven wheel (605) and the first driving wheel (603).

7. An integrated wastewater multi-stage treatment device according to claim 6, characterized in that: The upper end of the mounting frame (101) is provided with a bearing bracket two (602). The drive shaft (601) is rotatably installed inside the bearing bracket two (602). A drive wheel two (606) is sleeved on the outer wall of the drive shaft (601). A driven wheel two (608) with a radius larger than the drive shaft (601) is sleeved on the outer wall of the cleaning shaft (405).

8. An integrated wastewater multi-stage treatment device according to claim 7, characterized in that: Above the mounting frame (101), there is a slag discharging structure (500). The slag discharging structure (500) includes bearing brackets one (505) that are symmetrically distributed and fixed to the upper end of the mounting frame (101). An extrusion shaft (503) is rotatably installed inside the bearing brackets one (505). Above the bearing brackets one (505), a support plate (501) is fixed. A sliding sleeve (506) is embedded and installed inside the support plate (501). An impact rod (502) is slidably installed inside the sliding sleeve (506). A rubber block (508) is provided at the lower end of the impact rod (502). A limit ring (507) is sleeved on the outer wall of the impact rod (502). A spring (509) sleeved on the outer side of the impact rod (502) is arranged between the limit ring (507) and the support plate (501). One end of the limit block is provided with a connecting rod (510). A convex block (504) located below the connecting rod (510) is arranged on the outer wall of the extrusion shaft (503).

9. An integrated wastewater multi-stage treatment device according to claim 8, characterized in that: A ball (511) is rotatably installed at the lower end of the connecting rod (510). Synchronous wheels (610) are sleeved on the outer walls of the drive shaft (601) and the extrusion shaft (503). A belt three (609) is sleeved on the outer walls of the synchronous wheels (610).

10. A multi-stage treatment process for comprehensive wastewater, characterized in that: The steps of the comprehensive wastewater multi-stage treatment process method are as follows: S1: The comprehensive wastewater formed by mixing pretreated degreasing wastewater, sulfur-containing wastewater, chrome tanning wastewater and wastewater generated from other sections is transported into the diversion trough (103) and then guided by the diversion trough (103) and transported into the treatment pool (102). The comprehensive wastewater is located on one side of the filtering surface (206). The comprehensive wastewater is filtered through the filtering surface (206) of the filter screen (205) by self-flow. The pores inside the filter screen (205) are small. During use, the inner wall of the filter screen (205) is supported by the support screen (207) to enhance the strength of the filter screen (205). The comprehensive wastewater is subjected to primary fine filtration. Large-sized solid substances are intercepted at one end of the filter screen (205). The filtered comprehensive wastewater is transported into the confluence box (300). S2: At the same time, since the integrated wastewater is initially filtered, most of the solid particles in the integrated wastewater are intercepted by the filter screen (205). In cooperation with this, the motor (202) drives the conveying roller (203) to rotate. While the conveying roller (203) rotates, the support net (207) is driven to rotate by friction. The support net (207) is a flexible support net (207) with a rubber layer on the inner wall. The outer wall of the conveying roller (203) is also provided with a rubber layer. The friction of the rubber causes the flexible support net (207) to rotate during the conveying process. The outer wall of the delivery roller (203) rotates, and the filter screen (205) rotates in conjunction therewith. During the rotation of the filter screen (205), the pump housing (412) draws external air through the air pipe (411) into the interior of the installation box (409), and acts on the inner wall of the filter screen (205) through the nozzle (410), and the ejected airflow is transported from the inside to the outside. The outer wall of the filter screen (205) intercepts and follows the rotation of the filter screen (205) to lift solid matter, which is ejected by the airflow into the interior of the receiving frame (401), and the filter screen (205) is automatically cleaned. The solid matter inside the receiving frame (401) is transported to a lower position through the inclined surface of the guide surface (403), and then transported to the inside of the transport pipe (407). At this time, the cleaning shaft (405) rotates to drive the twisting blade (406) to rotate, and the twisting blade (406) twists and transports the solid matter. The solid matter is discharged through the transport pipe (407) connected to one side of the lower end of the transport pipe (407). When the water inside the solid matter is transported through the guide surface (403), when it passes through the through hole (404) of the guide surface (403), the liquid carried inside the solid matter flows out downward and flows back into the processing pool (102), thereby realizing automatic cleaning of the intercepted solid matter. S3: When the conveying roller (203) rotates, it drives the driving roller to rotate, and drives the driving wheel 1 (603), the driving wheel 2 (606) and the synchronous wheel (610) on the outer wall to rotate. The driving wheel 1 (603) is linked to the driven wheel 1 (605) through the belt 1 (604), and drives the pump shaft (414) to rotate. Because the radius of the driving wheel 1 (603) is larger than that of the driven wheel 1 (605), the driving wheel 1 (603) accelerates the driven wheel 1 (605). The driven wheel 1 (605) drives the pump shaft (414) to rotate faster, so that the impeller (415) sucks airflow, providing airflow for the nozzle (410) to spray and clean the filter screen (205); When the driving wheel 2 (606) rotates, it drives the driven wheel 2 (608) to rotate through the linkage of the belt 2 (607), thereby mobilizing the cleaning shaft (405) to rotate. Because the radius of the driving wheel 2 (606) is smaller than that of the driven wheel 2 (608), the transmission of the driving wheel 2 (606) causes the driven shaft 2 to decelerate, and the cleaning shaft (405) achieves decelerated rotation, which adapts to the output of solid matter and prevents the shredder (406) from rotating too fast. The synchronous pulley (610) drives the extrusion shaft (503) to rotate through the synchronous belt three (609). When the bump (504) on the outer wall of the extrusion shaft (503) passes through the connecting rod (510), it presses the ball (511) at the lower end of the extrusion connecting rod (510), and then applies an extrusion force to the limit ring (507) through the connecting rod (510). The limit ring (507) drives the impact rod (502) to lift. While the impact rod (502) slides inside the support plate (501) through the sliding sleeve (506), it presses the spring (509). When the bump (504) passes through the connecting rod (510), through the elastic force of the spring (509) itself and the guidance of the elastic force of the spring (509) by the limit ring (507), the impact rod (502) impacts the top cover (402), thereby realizing the vibration of the receiving frame (401) to assist the flow of solid matter collection. The use of the processing structure, the cleaning structure (400), and the slag discharge structure (500) is driven by a single high-power motor (202) through the linkage structure (600).

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