Cotton washing sewage treatment device with recycling and sorting functions

Abstract

The invention relates to a cotton washing sewage treatment device with recycling and sorting functions, and belongs to the technical field of sewage treatment. The device is composed of a sewage filtering assembly, a separate filtering and impurity removing assembly, a recycled material water removing device and a rear-end processing assembly. The sewage filtering assembly comprises a sewage coarse filtering bin and an annular filtering belt with the two ends exposed, and the filtering belt achieves reciprocating circulation operation through a winding roller driven by a driving motor. A plurality of gravity separation bins are arranged in the filtering impurity removal assembly, and the tail end of the filtering impurity removal assembly is connected with a liquid discharge channel. And the recycled material dewatering device is connected into the liquid discharge channel, and the mixture flow is dewatered through a solid-liquid separation technology. And the filtrate of the sewage rough filtration bin passes through a second liquid discharge pipe, and the separation liquid of the recovery device passes through a third liquid discharge pipe and is converged into a rear-end treatment assembly. According to the device, fiber substances in cotton spinning sewage are efficiently recycled through a four-stage treatment structure, the water quality treatment effect is improved, recycled cotton fiber fragments and the like are converted into available resources, and the device has both environmental benefits and economic values.

Description

Technical Field

[0001] This application belongs to the technical field of sewage treatment, and specifically relates to a cotton washing sewage treatment device with a recycling and sorting function. Background Art

[0002] When producing refined cotton from cotton as raw material, impurity removal is required first. For example, sundries such as sediment and metal flakes in cotton are removed by a cotton washing machine. The sewage from the cotton washing machine contains complex components, including plant debris such as cottonseed hulls, leaf debris, boll hulls, and cotton stalk fragments; inorganic particles such as sand and dust; organic pollutants such as pectin and waxy substances; suspended substances such as cotton fibers and lint, and some chemical residues, etc.

[0003] Among these impurities contained in the sewage, cotton fibers, lint, and cotton floc fragments have recycling value and can be used as filling materials or recycled textile raw materials after recycling. However, in the prior art, the treatment of sewage is relatively extensive. The solid substances after filtration are not further classified and are uniformly treated as solid waste, without further exploring their economic value, reducing the resource utilization efficiency. Summary of the Invention

[0004] The technical problem to be solved by this application is: to overcome the deficiencies of the prior art and provide a cotton washing sewage treatment device with a recycling and sorting function. This application can recycle cotton fibers, lint, and cotton floc fragments in sewage as a kind of substance, endow the sewage treatment with reuse value, increase the resource utilization rate, and improve the economic value.

[0005] The technical solution adopted by this application to solve the problems existing in the prior art is: A cotton washing sewage treatment device with a recycling and sorting function includes a sewage filtration assembly, a sub-filtration and impurity removal assembly, a recycling material dewatering device, and a rear-end treatment assembly.

[0006] The sewage filtration assembly includes a sewage rough filtration bin with an open upper end and a filter belt. Both ends of the filter belt are exposed outside the sewage rough filtration bin, and both ends of the filter belt are respectively wound around winding rollers, and the winding rollers are connected to a driving motor.

[0007] The sub-filtration and impurity removal assembly includes a sub-filtration and impurity removal bin. Both ends of the filter belt are arranged inside the sub-filtration and impurity removal bin. The bottom of the sub-filtration and impurity removal bin is recessed downward with a number of spaced gravity separation bins, and a drain channel is provided downward at the end of the water flow direction in the sub-filtration and impurity removal bin.

[0008] The inlet of the recycling material dewatering device is connected to the drain channel, and the recycling material dewatering device separates the solid-liquid of the mixture flowing in from the drain channel.

[0009] The liquid filtered by the filter belt inside the sewage rough filtration bin is connected to the rear-end treatment assembly through a second drain pipe.

[0010] The liquid separated by the recyclable dewatering device is connected to the rear-end treatment assembly through a third drain pipe.

[0011] Preferably, a filter belt cleaning assembly is connected inside the filtration and impurity removal bin.

[0012] The filter belt cleaning assembly includes two cleaning nozzles, a water supply pipe, and a water pump. The two cleaning nozzles are respectively arranged at both ends of the filter belt, and several spray holes are arranged at the positions of the cleaning nozzles facing the ends of the filter belt.

[0013] Preferably, the shape of the spray holes is frustum-shaped, and the outer inner diameter is larger than the inner inner diameter.

[0014] Preferably, the cleaning nozzles are arranged above the outer sides of the ends of the filter belt.

[0015] Preferably, the water pump is connected to the liquid storage area of the recyclable dewatering device or the liquid storage area of the rear-end treatment assembly through a first drain pipe.

[0016] Preferably, clamping plates are arranged on two opposite outer sides at the open lower end of the sewage coarse filtration bin. The ends of the filter belt are slidably arranged inside the clamping plates. A material passing channel is arranged on the end face of the sewage coarse filtration bin in the running direction of the filter belt, and the ends of the filter belt are arranged outside the material passing channel.

[0017] Preferably, an inclined plate is arranged in the middle inside the filtration and impurity removal bin. The inclined plate is arranged above the gravity separation bin and the drain channel. The height of the end of the inclined plate above the drain channel is high, and a first liquid discharge hole is arranged at one end of the inclined plate far away from the drain channel.

[0018] Preferably, a second liquid discharge hole is arranged at the bottom of the gravity separation bin. A blanking plate is covered at the bottom of the second liquid discharge hole, and a third telescopic device is connected below the blanking plate.

[0019] Preferably, the recyclable dewatering device includes a recyclable dewatering bin with an open upper end. The drain channel is arranged opposite to the middle position of the open end of the recyclable dewatering bin. A water pressing plate that moves up and down is respectively arranged on both sides of the drain channel above the recyclable dewatering bin.

[0020] A terminal filter is slidably arranged inside the recyclable dewatering bin. The length of the terminal filter is less than or equal to 2 / 3 of the overall length of the recyclable dewatering bin. The terminal filter includes two left and right side plates. Parallel intermediate plates are arranged between the two side plates. The intermediate plates and the two side plates are fixedly connected by support rods below. A first filter plate is placed on the support rods.

[0021] Preferably, the backend processing assembly includes a large impurity filtration bin with an open upper end, which is arranged below the gravity separation bin. A second filter plate is provided inside the large impurity filtration bin.

[0022] Compared with the prior art, the beneficial effects of the present application are as follows: (1) This device realizes the efficient recovery of fibrous substances in the cotton washing wastewater through a four-stage treatment structure, which not only improves the water quality treatment effect but also converts the recovered cotton floc fragments and the like into utilizable resources, with both environmental benefits and economic value.

[0023] (2) The first-stage filtration is carried out by a filter belt that can be wound and reciprocated to preliminarily separate the utilizable impurities in the wastewater. At the same time, the filter belt cleaning assembly cleans the filter belt that moves to the end to ensure the filtering effect of the filter belt, and can effectively ensure that all the utilizable impurities filtered by the filter belt enter the sub-filtering and impurity-removing assembly for secondary filtration to separate the cotton floc fragments and short fibers with the most economic value and utilization value.

[0024] (3) The water removal device for the recovered materials with a pushing device squeezes and removes the water inside the cotton floc fragments and short fibers through a water pressing plate, and automatically collects the materials through the pushing device after water removal. It solves the problems that the density of the cotton floc fragments and short fibers is similar to that of water, the centrifugal separation effect is poor, and it is difficult to take materials from the closed filter. Description of the Drawings

[0025] The following further illustrates the present application with reference to the drawings and embodiments.

[0026] Figure 1 It is the first structure diagram of a cotton washing wastewater treatment device with a recovery and sorting function according to the present application. Figure 2 It is the second structure diagram of a cotton washing wastewater treatment device with a recovery and sorting function according to the present application. Figure 3 It is a partial cross-sectional view of a cotton washing wastewater treatment device with a recovery and sorting function according to the present application. Figure 4 It is for Figure 3 The partial enlarged view at A in Figure 5 It is the structure diagram of the sewage filtration assembly in a cotton washing wastewater treatment device with a recovery and sorting function according to the present application. Figure 6 It is the structure diagram of the filter belt cleaning assembly in a cotton washing wastewater treatment device with a recovery and sorting function according to the present application. Figure 7 It is the cross-sectional view of the cleaning nozzle in a cotton washing wastewater treatment device with a recovery and sorting function according to the present application. Figure 8 It is the front view of the end of the filter belt cleaning assembly according to the present application. Figure 9 This is the first structural diagram of the filtering and impurity removing assembly in a cotton washing sewage treatment device with a recycling and sorting function according to the present application. Figure 10 This is the second structural diagram of the filtering and impurity removing assembly in a cotton washing sewage treatment device with a recycling and sorting function according to the present application. Figure 11 This is the structural diagram of the lower layer device in a cotton washing sewage treatment device with a recycling and sorting function according to the present application. Figure 12 This is the structural diagram of the water removal device for recycled materials in a cotton washing sewage treatment device with a recycling and sorting function according to the present application. Figure 13 is Figure 12 a partial cross-sectional view of Figure 14 is Figure 13 an exploded view of Figure 15 This is the first structural diagram of the terminal filter in a cotton washing sewage treatment device with a recycling and sorting function according to the present application. Figure 16 This is the second structural diagram of the terminal filter in a cotton washing sewage treatment device with a recycling and sorting function according to the present application.

[0027] In the figure: 1 - sewage coarse filter bin, 101 - extension plate, 102 - clamping plate, 103 - material passing channel, 2 - filter belt, 201 - left end winding roller, 202 - right end winding roller, 3 - left end drive motor, 4 - right end drive motor, 5 - cleaning spray pipe, 501 - spray hole, 6 - material pushing spray pipe, 7 - water supply pipe, 8 - water pump, 9 - filtering and impurity removing bin, 901 - upper connection port, 902 - inclined plate, 9021 - first lower liquid hole, 903 - gravity separation bin, 9031 - second lower liquid hole, 904 - liquid discharge channel, 10 - first liquid discharge pipe, 11 - support plate, 12 - ejector rod, 13 - spring, 14 - scraper, 15 - second liquid discharge pipe, 16 - recycled material water removal bin, 1601 - horizontal through hole, 1602 - support platform, 17 - third liquid discharge pipe, 18 - side plate, 1801 - middle plate, 1802 - connecting plate, 1803 - support rod, 19 - first filter plate, 20 - water pressing plate, 21 - first telescopic device, 22 - material pushing device, 2201 - rear end plate, 2202 - front end plate, 2203 - upper outer connecting rod, 23 - second telescopic device, 2301 - telescopic rod, 24 - electric linear module, 25 - large impurity filtering bin, 2501 - discharge port, 26 - second filter plate, 27 - blanking plate, 28 - third telescopic device, 29 - solid impurity collection bin, 30 - recycled material collection bin, 31 - platform, 32 - limiting plate. Detailed implementation manners

[0028] The present application for a cotton washing sewage treatment device with a recycling and sorting function will be further described in detail with reference to the accompanying drawings, but it is not intended to limit the present application.

[0029] As Figures 1 to 16 shown, a cotton washing sewage treatment device with a recycling and sorting function includes a sewage filtration assembly, a sub-filtration and impurity removal assembly, a recycling water removal device, and a backend treatment assembly.

[0030] In the sewage after cotton washing, the particle sizes of various components are different. The particle size range of short fibers and cotton floc fragments is 0.1 - 5 mm, which is significantly larger than that of colloidal particles (<1 μm) and inorganic salt substances, and separation can be completely achieved by filtration.

[0031] However, there are also some substances in the sewage with particle sizes larger than those of short fibers and cotton floc fragments. For example, the particle size of cottonseed hull residues is mostly 0.5 - 3 mm; the size of cotton boll shell fragments can reach 1 - 5 mm, showing a sheet or block shape; the sandy particle impurities during the planting or transportation of raw cotton have a particle size of 0.1 - 2 mm. After filtering the sewage, these substances are also included in the filter species.

[0032] The substances in the filter species have different densities. The density of cotton floc fragments and short fibers is 1.1 - 1.3 g / cm³, the density of cottonseed hull fragments is 1.4 - 1.6 g / cm³, and the density of sandy particles is 2.6 - 2.8 g / cm³. The density of cotton floc fragments and short fibers is significantly lower than that of other impurities. Therefore, separation can be carried out based on the density difference to finally obtain cotton floc fragments and short fibers for reuse.

[0033] In this embodiment, the sewage filtration assembly realizes the first-stage filtration, and the filter species contains cotton floc fragments and short fibers as key recycling substances, as well as large particle substances such as cottonseed hulls, cotton boll shells, and sandy particles.

[0034] The sub-filtration and impurity removal assembly further separates based on the different densities of the above substances to finally obtain cotton floc fragments and short fiber recyclables.

[0035] The recycling water removal device removes water from the cotton floc fragments and short fiber recyclables to reduce their humidity, facilitating later use or storage.

[0036] The backend treatment assembly collects the wastewater after overall treatment and conducts centralized transfer treatment on the wastewater.

[0037] Further, in this embodiment, the sewage filtration assembly includes a sewage rough filtration bin 1 with an open upper end and a filter belt 2. Both ends of the filter belt 2 are exposed outside the sewage rough filtration bin 1. Both ends of the filter belt 2 are respectively wound around winding rollers, and the winding rollers are connected to drive motors. The filter belt 2 is made of a flexible material. Its left end is wound around the left winding roller 201, and its right end is wound around the right winding roller 202. The left winding roller 201 is driven to rotate by a left drive motor 3, and the right winding roller 202 is driven to rotate by a right drive motor 4. The left drive motor 3 and the right drive motor 4 are respectively fixedly connected to the outer wall of the sewage rough filtration bin 1 or the outer wall of the sub - filtration and impurity removal bin 9.

[0038] To prevent the middle part of the filter belt 2 from deforming during the impact of sewage, the sewage flows down from both ends in the width direction of the filter belt 2. The width of the filter belt 2 is greater than the width of the open end of the sewage rough filtration bin 1. Two clamping plates 102 are provided on the two outer sides opposite to the lower end of the open end of the sewage rough filtration bin 1. The ends of the filter belt 2 are slidably arranged inside the clamping plates 102. A material - passing channel 103 is provided on the end face of the sewage rough filtration bin 1 in the running direction of the filter belt 2. The ends of the filter belt 2 are arranged outside the material - passing channel 103.

[0039] Meanwhile, extension plates 101 with a certain length extend outward on the outer sides at both ends of the material - passing channel 103. The bottom of the extension plate 101 abuts against the top surface of the filter belt 2.

[0040] The sub - filtration and impurity removal assembly includes a sub - filtration and impurity removal bin 9. The top surface of the sub - filtration and impurity removal bin 9 is provided with an upper connection port 901. The bottom of the sewage rough filtration bin 1 penetrates into the sub - filtration and impurity removal bin 9 through the upper connection port 901. The two clamping plates 102 on both sides are placed on the top surface of the side wall of the upper connection port 901.

[0041] Both ends of the filter belt 2 are arranged inside the sub - filtration and impurity removal bin 9. A filter belt cleaning assembly is connected inside the sub - filtration and impurity removal bin 9. The filter belt cleaning assembly includes two cleaning spray pipes 5, a water supply pipe 7, and a water pump 8. The two cleaning spray pipes 5 are respectively arranged at both ends of the filter belt 2. The cleaning spray pipes 5 are arranged above the outer sides of the ends of the filter belt 2.

[0042] A number of spray holes 501 are provided at the positions of the cleaning spray pipes 5 facing the ends of the filter belt 2. The shape of the spray holes 501 is frustum - shaped, with the outer inner diameter larger than the inner inner diameter. In this way, the spraying area of the water flow can be effectively enlarged, and then, while covering the ends of the filter belt 2, the number of spray holes 501 can be reduced, thereby increasing the pressure of the sprayed liquid and the processing cost.

[0043] The water pump 8 is connected to the liquid storage area of the recycling water de - watering device or the liquid storage area of the rear - end treatment assembly through a first drain pipe 801.

[0044] The left-end driving motor 3 and the right-end driving motor 4 operate at intervals, causing the filter belt 2 to move reciprocally to the left and right ends. For the filter belt 2 that moves to the ends, the cleaning nozzle 5 above it sprays water through the spray holes 501 to wash the solid substances attached to its surface into the internal part of the separation and impurity-removing bin 9.

[0045] To further improve the cleaning effect on the filter belt 2 and make its surface clean when it is wound around the winding roller, a scraping plate 14 is provided directly below the axis of the winding roller. A number of spacer bars 12 are arranged at the bottom of the scraping plate 14. A limiting disc is fixed below the spacer bars 12 after they pass through the support plate 11. A spring 13 is sleeved on the spacer bars 12 above the support plate 11. Under the push of the spring 13, the top of the scraping plate 14 always abuts against the filter belt 2 to clean it by scraping.

[0046] A number of spaced gravity separation bins 903 are concavely provided downward at the bottom of the separation and impurity-removing bin 9. A liquid discharge channel 904 is provided downward at the end of the separation and impurity-removing bin 9 in the water flow direction. An inclined plate 902 is provided in the middle of the internal part of the separation and impurity-removing bin 9. The inclined plate 902 is arranged above the gravity separation bins 903 and the liquid discharge channel 904. The height of the end of the inclined plate 902 above the liquid discharge channel 904 is high. A first liquid discharge hole 9021 is provided at one end of the inclined plate 902 away from the liquid discharge channel 904.

[0047] The mixed liquid mixed with the solid substances filtered by the filter belt 2 flows downward through the inclined plate 902 and then is discharged into the lower space of the separation and impurity-removing bin 9 through the first liquid discharge hole 9021. To prevent the solid substances in the mixed liquid from remaining on the inclined plate 902, a material-pushing nozzle 6 with spray holes is provided at the high point of the inclined plate 902. The material-pushing nozzle 6 is connected to the water supply pipe 7, and water is sprayed through the material-pushing nozzle 6 to clean the inclined plate 902.

[0048] Inside this space, the mixed liquid flows towards the liquid discharge channel 904 and needs to pass through a number of gravity separation bins 903 during the flow. Since the solid substances in this part of the mixed liquid are mainly cotton floc fragments, short fibers, cottonseed hull fragments, sand particles, etc., and the density of the cotton floc fragments and short fibers is significantly lower than that of other impurities. Moreover, the density of the cotton floc fragments and short fibers is close to that of water and basically floats on the water surface or in the upper layer of the water body. Therefore, during the flow of the mixed liquid, the cottonseed hull fragments, sand particles, etc. will fall into the internal part of the gravity separation bins 903, and the cotton floc fragments and short fibers will be discharged from the liquid discharge channel 904 along with the water flow.

[0049] An air bubble generator can be added inside the gravity separation bin 903. This air bubble generator uses the existing technology and can generate dense air bubbles. Through the air flotation method, the cotton floc fragments and short fibers that accidentally enter the internal part of the gravity separation bin 903 are lifted to separate them.

[0050] Under the action of gravity, solid impurities with a density greater than that of cotton floc fragments and short fibers are deposited inside the gravity separation bin 903. To be able to discharge them regularly, a second liquid outlet hole 9031 is provided at the bottom of the gravity separation bin 903. A blanking plate 27 is covered at the bottom of the second liquid outlet hole 9031, and a third telescopic device 28 is connected below the blanking plate 27. The third telescopic device 28 controls the blanking plate 27 to move downward, opens the second liquid outlet hole 9031, and discharges the sundries precipitated at the bottom of the gravity separation bin 903.

[0051] This part of the sundries mainly includes plant fragments and cottonseed hulls, etc., and also has certain utilization value and can be used as an additive for the preparation of biomass fuel. In order to collect this part of the solid matter. In this embodiment, the rear-end treatment assembly includes a large-impurity filtration bin 25 with an open upper end, the large-impurity filtration bin 25 is arranged below the gravity separation bin 903, and a second filter plate 26 is provided inside the large-impurity filtration bin 25 for filtering it. To achieve automatic collection, the second filter plate 26 is arranged obliquely, and a discharge port 2501 is provided on the side wall of the large-impurity filtration bin 25 at the lowest point of the second filter plate 26. Outside the large-impurity filtration bin 25 and below the discharge port 2501, there is a solid-impurity collection bin 29, which can collect the solid matter intercepted by the second filter plate 26 discharged from the discharge port 2501.

[0052] The inlet of the recycled material dewatering device is connected to the liquid discharge channel 904, and the recycled material dewatering device realizes the solid-liquid separation of the mixture flowing into the liquid discharge channel 904. The liquid filtered by the filter belt 2 inside the sewage rough filtration bin 1 is connected to the rear-end treatment assembly through the second drain pipe 15. The liquid separated by the recycled material dewatering device is connected to the rear-end treatment assembly through the third drain pipe 17.

[0053] The purpose of the recycled material dewatering device is to perform solid-liquid separation. Since the density of water and the solid cotton floc fragments and short fibers to be separated is similar, effective separation cannot be achieved by a centrifuge. If a closed filter is used, it is rather troublesome to take out the cotton floc fragments and short fibers, and the continuity of the process cannot be realized.

[0054] To solve the above problems, in this embodiment, the recycled material dewatering device includes a recycled material dewatering bin 16 with an open upper end. The liquid discharge channel 904 is arranged opposite to the middle position of the open end of the recycled material dewatering bin 16. Above the recycled material dewatering bin 16 and on both sides of the liquid discharge channel 904, there is a water pressing plate 20 that moves up and down respectively. The water pressing plate 20 is connected to the first telescopic device 21 above it. The first telescopic device 21 controls its up and down movement, and the first telescopic device 21 is fixedly connected to the outer wall of the liquid discharge channel 904 through a bracket.

[0055] A terminal filter slides within the recyclable material dewatering bin 16. Its length is less than or equal to two-thirds of the bin's overall length. It comprises left and right side panels 18, with a parallel intermediate panel 1801 positioned between them. Intermediate panel 1801 is fixedly connected to the two side panels 18 via support rods 1803 below, on which first filter plates 19 are mounted. Intermediate panel 1801 divides the terminal filter into two independent filter units of equal area. A connecting plate 1802 is located at the top of intermediate panel 1801. A horizontally arranged electric linear module 24 is secured to the exterior of the recyclable material dewatering bin 16, with connecting plate 1802 fixedly connected to the sliding portion of the electric linear module 24.

[0056] Driven by the electric linear module 24, an independent filter unit in the terminal filter is located directly below the drainage channel 904, and the other filter unit is located directly below the water pressure plate 20, and water removal is achieved by pressing down the water pressure plate 20.

[0057] In order to push the solid matter after squeezing and dehydration out of the filter unit and collect it. In this embodiment, the side wall of the recyclable dehydration tank 16 located below the water pressure plate 20 is provided with a transverse through hole 1601, and a sliding pushing device 22 is provided inside the transverse through hole 1601. The pushing device 22 includes a rear end plate 2201 and a front end plate 2202, which are fixedly connected by an upper outer connecting rod 2203 on the upper outside. When the rear end plate 2201 and the front end plate 2202 are in use, they are respectively arranged in two oppositely arranged transverse through holes 1601. The bottom surface of the rear end plate 2201 is flush with the top surface of the first filter plate 19. The arrangement position of the upper outer connecting rod 2203 will not hinder the sliding of the terminal filter.

[0058] The rear end of the rear end plate 2201 is connected to the second telescopic device 23 through the telescopic rod 2301 , and the second telescopic device 23 is connected to the recyclable material dewatering bin 16 through the support platform 1602 .

[0059] A recyclable material collecting bin 30 with an open top is provided in front of the recyclable material dewatering bin 16 , and the two are in contact with each other. The open top of the recyclable material collecting bin 30 is lower than the rear end plate 2201 and the front end plate 2202 .

[0060] During use, the drainage channel 904 discharges the mixed liquid into a filter unit of the terminal filter. When a certain amount of solid matter remains inside the filter unit, the electric linear module 24 drives the terminal filter to move, so that another filter unit moves to the bottom of the drainage channel 904, and the filter unit moves to the bottom of the water pressure plate 20.

[0061] The water pressing plate 20 moves downward to extrude the solids above the first filter plate 19 to remove excess water, and then the water pressing plate 20 moves upward. After the water pressing plate 20 moves upward, the second telescopic device 23 pushes the material pushing device 22 forward, and the rear end plate 2201 discharges the solids above the first filter plate 19 and drops them into the interior of the recycled material collection bin 30. A travel switch can be provided above the water pressing plate 20 to determine whether it has moved up to the highest point without interfering with the forward movement of the rear end plate 2201.

[0062] The above devices or assemblies are installed on the platform 31 for easy transportation and site selection. A vertically arranged limiting plate 32 is provided on the platform 31, and the recycled material collection bin 30 is clamped between the limiting plate 32 and the recycled material water removal bin 16 and can be slidably connected thereto for easy removal of the internal recycled materials.

[0063] A liquid discharge main pipe is provided at the bottom of the large impurity filtration bin 25 to partially discharge the waste liquid after the recyclable substances are recovered for subsequent treatment. At the same time, a liquid level gauge is provided inside the large impurity filtration bin 25 to ensure that the liquid level height inside it meets the usage requirements of the water pump 8.

[0064] The embodiments of the present application have been described in detail above in conjunction with the accompanying drawings. However, the present application is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present application within the scope of knowledge possessed by those of ordinary skill in the art.

Claims

1. A cotton-washing sewage treatment device with recycling and sorting functions, characterized in that: It includes a sewage filtration assembly, a sub-filtration and impurity removal assembly, a recycling water removal device, and a backend treatment assembly; The sewage filtration assembly includes a sewage coarse filtration bin (1) with an open upper end and a filter belt (2). Both ends of the filter belt (2) are exposed outside the sewage coarse filtration bin (1). Both ends of the filter belt (2) are respectively wound around winding rollers, and the winding rollers are connected to a driving motor; The sub-filtration and impurity removal assembly includes a sub-filtration and impurity removal bin (9). Both ends of the filter belt (2) are arranged inside the sub-filtration and impurity removal bin (9). The bottom of the sub-filtration and impurity removal bin (9) is recessed downward with a number of gravity separation bins (903) arranged at intervals. At the end of the sub-filtration and impurity removal bin (9) in the water flow direction, there is a liquid discharge channel (904) arranged downward; The inlet of the recycling water removal device is connected to the liquid discharge channel (904), and the recycling water removal device separates the solid and liquid in the mixture flowing in from the liquid discharge channel (904); The liquid filtered by the filter belt (2) inside the sewage coarse filtration bin (1) is connected to the backend treatment assembly through a second liquid discharge pipe (15); The liquid separated by the recycling water removal device is connected to the backend treatment assembly through a third liquid discharge pipe (17).

2. The cotton-washing sewage treatment device with recycling and sorting functions according to claim 1, characterized in that: A filter belt cleaning assembly is connected inside the sub-filtration and impurity removal bin (9); The filter belt cleaning assembly includes two cleaning nozzles (5), a water supply pipe (7), and a water pump (8). The two cleaning nozzles (5) are respectively arranged at both ends of the filter belt (2). A number of spray holes (501) are arranged at the positions of the cleaning nozzles (5) facing the ends of the filter belt (2).

3. The cotton-washing sewage treatment device with recycling and sorting functions according to claim 2, characterized in that: The shape of the spray holes (501) is frustum-shaped, and the outer inner diameter is larger than the inner inner diameter.

4. The cotton-washing sewage treatment device with recycling and sorting functions according to claim 2 or 3, characterized in that: The cleaning nozzles (5) are arranged above the outside of the ends of the filter belt (2).

5. The cotton-washing sewage treatment device with recycling and sorting functions according to claim 2 or 3, characterized in that: The water pump (8) is connected to the liquid storage area of the recycling water removal device or the liquid storage area of the backend treatment assembly through a first liquid discharge pipe (10).

6. The cotton-washing sewage treatment device with recycling and sorting functions according to claim 5, characterized in that: Clamping plates (102) are arranged on two opposite outer sides of the open lower end of the sewage coarse filtration bin (1). The ends of the filter belt (2) are slidably arranged inside the clamping plates (102). A material passing channel (103) is arranged on the end face of the sewage coarse filtration bin (1) in the running direction of the filter belt (2), and the ends of the filter belt (2) are arranged outside the material passing channel (103).

7. The cotton-washing sewage treatment device with recycling and sorting functions according to claim 1 or 2 or 3 or 6, characterized in that: Inside the impurity separation and filtration bin (9), an inclined plate (902) is provided in the middle. The inclined plate (902) is arranged above the gravity separation bin (903) and the liquid discharge channel (904). The height of the end of the inclined plate (902) above the liquid discharge channel (904) is high. A first liquid discharge hole (9021) is provided at one end of the inclined plate (902) away from the liquid discharge channel (904).

8. The cotton washing sewage treatment device with a recycling and sorting function according to claim 7, wherein: A second liquid discharge hole (9031) is provided at the bottom of the gravity separation bin (903). A blanking plate (27) is covered at the bottom of the second liquid discharge hole (9031). A third telescopic device (28) is connected below the blanking plate (27).

9. The cotton washing sewage treatment device with a recycling and sorting function according to claim 1 or 2 or 3 or 6 or 8, wherein: The recycling water removal device includes a recycling water removal bin (16) with an open upper end. The liquid discharge channel (904) is arranged opposite to the middle position of the open end of the recycling water removal bin (16). Above the recycling water removal bin (16) and on both sides of the liquid discharge channel (904), a pressing water plate (20) that moves up and down is provided respectively; A terminal filter is slidably arranged inside the recycling water removal bin (16). The length of the terminal filter is less than or equal to 2 / 3 of the overall length of the recycling water removal bin (16). The terminal filter includes two left and right side plates (18). Between the two side plates (18), an intermediate plate (1801) arranged in parallel is provided. The intermediate plate (1801) is fixedly connected to the two side plates (18) through a lower support rod (1803). A first filter plate (19) is placed on the support rod (1803).

10. The cotton washing sewage treatment device with a recycling and sorting function according to claim 1 or 2 or 3 or 6 or 8, wherein: The rear-end treatment assembly includes a large impurity filtration bin (25) with an open upper end. The large impurity filtration bin (25) is arranged below the gravity separation bin (903). A second filter plate (26) is provided inside the large impurity filtration bin (25).

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