Sediment and sewage separation device

Abstract

The utility model belongs to the technical field of sludge treatment, and particularly relates to a silt and sewage separation device, which is used for carrying out mud-water separation on silt and sewage in a sand washer and comprises a chemical pretreatment component, and the chemical pretreatment component is used for flocculating sludge of the silt and sewage. The conveyor belt is arranged on the machine frame, and the dewatering strength of the gravity dewatering assembly, the wedge-shaped pre-pressing assembly and the high-pressure extrusion assembly are sequentially enhanced in the conveying direction of the conveyor belt. The sludge-water separation device is provided with the gravity dehydration assembly, the wedge-shaped pre-pressing assembly and the high-pressure extrusion assembly of which the dehydration strength is enhanced in sequence, so that the sludge-water separation efficiency can be improved, and the separation quality can also be ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of sludge treatment, and particularly relates to a sediment sewage separation device. Background Art

[0002] With the rapid economic growth and the rapid development of industry and agriculture, environmental problems have become prominent. Among them, the impact of human destruction of river channels is relatively serious. The dumping of garbage and the discharge of sewage have continuously deteriorated the water quality in the current river channels. Not only are aquatic organisms decreasing, but the river channels are also severely silted up, seriously affecting the flood control function.

[0003] With the precipitation of sludge in the river water, a large amount of silt will be deposited at the bottom and side walls of the river channel, which needs to be cleaned regularly. The existing cleaning methods mainly scrape the silt at the bottom and inner side walls of the river channel through a sludge suction machine or scraping method. There are a large amount of sand and gravel in the scraped silt, and screening out the sand in the sludge will bring good benefits.

[0004] At present, the screening of river channel sludge usually includes processes such as sludge collection, debris screening, sand washing, and mud dewatering and solid-liquid separation. The current mud dewatering and solid-liquid separation process usually uses a sludge screening device, which is a production line type and at least includes the integration of multiple devices. For example, a drum screen corresponds to the debris screening process, a sand washer corresponds to the sand washing process, and a sediment sewage separation device corresponds to the mud dewatering and solid-liquid separation process.

[0005] At present, the sediment sewage separation device usually uses a sedimentation tank for solid-liquid separation, but this method has low efficiency and poor separation quality. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a sediment sewage separation device for the above-mentioned existing technical problems, achieving the effects of improving the solid-liquid separation efficiency and ensuring the separation quality.

[0007] In view of this, the utility model provides a sediment sewage separation device. The sediment sewage separation device is used for separating sediment sewage in a sand washer into mud and water. The sediment sewage separation device includes a chemical pretreatment component for flocculating the sludge in the sediment sewage, and also includes a frame and a conveyor belt arranged on the frame, a gravity dewatering component, a wedge pre-pressing component, and a high-pressure extrusion component with gradually increasing dehydration intensity along the conveyor belt conveying direction.

[0008] The mud - water mixture passes through a gravity dehydration component, a wedge - shaped pre - pressing component, and a high - pressure extrusion component in sequence for mud - water separation. Finally, the sludge is dehydrated into a mud cake and discharged from the sediment and sewage separation device, and the sewage also meets the discharge requirements. The sediment and sewage separation device has a gravity dehydration component, a wedge - shaped pre - pressing component, and a high - pressure extrusion component with gradually increasing dehydration intensities, which can improve the mud - water separation efficiency and ensure the separation quality.

[0009] Furthermore, the wedge - shaped pre - pressing component includes:

[0010] A first mounting frame, which is fixedly arranged on the frame and spans across the conveyor belt;

[0011] Extrusion plates. There are multiple extrusion plates. An extrusion channel is formed between two adjacent extrusion plates arranged in a "V" - shape. Along the transmission direction of the conveyor belt, the width of the extrusion channel gradually decreases.

[0012] In this technical solution, after the mud - water mixture is dehydrated by the gravity dehydration component, it is transported to the extrusion channel along with the conveyor belt. Due to the gradually decreasing width of the extrusion channel, it can play a role in extruding the mud - water mixture.

[0013] Furthermore, along the transmission direction of the conveyor belt, at least two sets of wedge - shaped pre - pressing components are arranged front - to - back. The extrusion plates of the front - to - back two sets of wedge - shaped pre - pressing components are staggered with each other in the direction perpendicular to the transmission direction of the conveyor belt.

[0014] In this technical solution, the staggered setting can enable part of the mud - water mixture coming out of the non - extrusion channel of the previous set of wedge - shaped pre - pressing components to enter the extrusion channel of the next set of wedge - shaped pre - pressing components, so that part of the un - extruded mud - water mixture can also be extruded and dehydrated.

[0015] Furthermore, the conveyor belt includes a first conveyor belt and a second conveyor belt. The first conveyor belt is located below the wedge - shaped pre - pressing component. The first conveyor belt and the second conveyor belt gradually approach each other on one side of the frame and gradually move away from each other on the other side of the frame. The high - pressure extrusion component includes:

[0016] Extrusion rollers. A plurality of extrusion rollers are arranged along the common transmission path of the first conveyor belt and the second conveyor belt, and the diameter of the extrusion rollers gradually decreases along the transmission direction of the conveyor belt. The second conveyor belt is tensioned on the surface of the extrusion rollers, and the first conveyor belt is tensioned on the side of the second conveyor belt away from the extrusion rollers;

[0017] Liquid - receiving trays, which are arranged below each extrusion roller and are used for receiving the extruded water.

[0018] In this technical solution, the muddy water mixture is continuously transported after being dehydrated by the gravity dehydration component and the wedge pre-pressing component on the first conveyor belt, and falls to the second conveyor belt at the corner. The muddy water mixture is transported between the first conveyor belt and the second conveyor belt and passes through each squeezing roller, so that the water in the muddy water mixture can be squeezed out. The water falls into the liquid receiving tray, and the mud cake with the water squeezed out falls from the other side of the frame where the first conveyor belt and the second conveyor belt gradually move away from each other.

[0019] Further, a kneading component is correspondingly arranged for the wedge pre-pressing component, and the kneading component is used for kneading the muddy water mixture passing through the extrusion channel.

[0020] In this technical solution, the kneading component can increase the water discharge efficiency when the muddy water mixture passes through the wedge pre-pressing component.

[0021] Further, the kneading component includes:

[0022] Kneading plates, there are two kneading plates in total, and the two kneading plates are respectively slidably arranged on the two extrusion plates forming the extrusion channel;

[0023] The second mounting frame, the second mounting frame is fixedly arranged on the frame and spans the conveyor belt in parallel with the first mounting frame. A turntable is rotatably arranged on the second mounting frame, and a fixing pin is arranged at a non-central position on the end face of the turntable facing the kneading plate;

[0024] Drive rods, each kneading plate corresponds to a drive rod and a turntable. One end of the drive rod is rotatably connected to the upper end of the kneading plate, and the other end is sleeved on the fixing pin of the turntable and rotatably connected to the positioning pin;

[0025] Power component, the power component is used to drive the turntables to rotate in the same direction and synchronously. The positions of the fixing pins on the two turntables corresponding to the two kneading plates in each extrusion channel are always centrosymmetric about the midpoint of the connection line of the centers of the two turntables.

[0026] In this technical solution, the power component drives the two turntables corresponding to the extrusion channel to rotate in the same direction and synchronously, so that the positioning pin moves to drive the drive rod to move, thereby driving the kneading plate to reciprocally slide on the extrusion plate. And the kneading plates on the two extrusion plates are always in a misaligned sliding mode with opposite sliding directions, forming a kneading action on the muddy water mixture conveyed forward in the extrusion channel. On the one hand, it can promote the extrusion and discharge of water, and on the other hand, it can also prevent the blockage of the muddy water mixture at the "V"-shaped small head end of the extrusion channel, enabling the wedge pre-pressing component to operate efficiently and reliably.

[0027] Further, a set of the above-mentioned kneading components is correspondingly arranged for each extrusion channel. A transmission gear is fixedly connected to the end of the turntable of each kneading component away from the fixing pin. All the kneading components share the same power component, and the power component includes:

[0028] A driving motor, wherein the driving motor is fixedly mounted on the second mounting frame, and an output gear is disposed at an output end of the driving motor;

[0029] A driven gear, the driven gear is coaxially fixedly connected to one of the rotating disks;

[0030] The toothed belt is tensioned by a sleeve on the outside of the transmission gears corresponding to all the turntables, and the toothed belt is meshed with the transmission gears.

[0031] In the present technical solution, the driving motor is started, driving the output gear and the driven gear to rotate, thereby causing one of the turntables connected to the driven gear to rotate, and the transmission gear corresponding to the turntable also rotates circumferentially, and the circumferential rotational motion is transmitted to each transmission gear through the toothed belt, thereby causing the turntable of each kneading component to rotate, and causing the kneading plate in each extrusion channel to perform a kneading action.

[0032] Furthermore, a protrusion is provided on the side of the kneading plate away from the squeezing plate.

[0033] In the technical solution, the protrusions are similar to rakes, which can drive more mud-water mixture to move during the sliding process of the kneading board, thereby increasing the kneading depth.

[0034] Furthermore, a rubber belt is provided at one end of the extrusion plate toward which the mud-water mixture is transmitted. The rubber belt is elastic, one end of the rubber belt is fixedly connected to the end of the extrusion plate away from the kneading plate, the rubber belt bypasses the end of the extrusion plate and the other end is fixedly connected to the end of the kneading plate.

[0035] In the technical solution, the rubber belt can prevent the mud-water mixture from entering the gap between the squeezing plate and the kneading plate, thereby ensuring the smooth sliding of the kneading plate.

[0036] The beneficial effects of the utility model are:

[0037] 1. The sediment and sewage separation device has three dehydration strengths that increase successively: gravity dehydration components, wedge-shaped pre-pressing components, and high-pressure extrusion components. This can improve the efficiency of mud and water separation, and the separation quality can also be guaranteed.

[0038] 2. After the mud-water mixture is dehydrated by the gravity dehydration component, it is transferred to the extrusion channel along the conveyor belt. As the width of the extrusion channel gradually decreases, it can play the role of extruding the mud-water mixture. The staggered arrangement of multiple groups of wedge-shaped pre-pressing components can allow part of the mud-water mixture transmitted from the non-extrusion channel of the previous group of wedge-shaped pre-pressing components to enter the extrusion channel of the next group of wedge-shaped pre-pressing components, so that part of the mud-water mixture that has not been squeezed can also be squeezed and dehydrated.

[0039] 3. The kneading component can form a kneading action on the muddy water mixture transported forward in the extrusion channel. On the one hand, it can promote the extrusion and discharge of water. On the other hand, it can prevent the blockage of the muddy water mixture at the small "eight"-shaped head end of the extrusion channel, increasing the water discharge efficiency when the muddy water mixture passes through the wedge-shaped preloading component and enabling the wedge-shaped preloading component to operate efficiently and reliably.

[0040] 4. The protrusions are similar to rakes and can drive more muddy water mixture to move during the sliding process of the kneading plate, increasing the depth of kneading.

[0041] 5. The rubber belt can prevent the muddy water mixture from entering the gap between the extrusion plate and the kneading plate, ensuring the smooth sliding of the kneading plate. Description of the Drawings

[0042] Figure 1 is a three-dimensional view of the sludge screening device;

[0043] Figure 2 is a three-dimensional view of the sediment and sewage separation device;

[0044] Figure 3 is a cross-sectional view of the sediment and sewage separation device;

[0045] Figure 4 is a top view of two groups of wedge-shaped preloading components;

[0046] Figure 5 is a three-dimensional view of the wedge-shaped preloading component;

[0047] Figure 6 is Figure 5 a partial enlarged view at A in

[0048] Figure 7 is a three-dimensional view of a kneading component for an extrusion channel;

[0049] Figure 8 is a top view of an extrusion channel;

[0050] Figure 9 is a bottom view of an extrusion channel;

[0051] Figure 10 is a schematic diagram in the embodiment;

[0052] The markings in the figure are indicated as:

[0053] 1. Drum sieve; 2. Sand washer; 3. Sediment and sewage separation device; 4. Chemical pretreatment component; 5. Filter screen; 6. Receiving box; 8. Impeller; 9. Feeding trough; 10. Reaction cylinder; 11. Conveyor belt; 12. Gravity dewatering component; 13. Wedge preloading component; 14. High-pressure extrusion component; 15. First mounting frame; 16. Extrusion plate; 17. Extrusion channel; 18. First conveyor belt; 19. Second conveyor belt; 20. Frame; 21. Extrusion roller; 22. Liquid receiving tray; 23. Kneading component; 24. Kneading plate; 25. Second mounting frame; 26. Driving rod; 27. Turntable; 28. Fixed pin; 29. Transmission gear; 30. Driving motor; 31. Driven gear; 32. Tooth belt; 33. Output gear; 34. Protrusion; 35. Rubber belt. Detailed implementation mode

[0054] The following will clearly describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope protected by the present application.

[0055] In the description of the present application, it should be noted that the terms used here are only for describing specific implementation modes and are not intended to limit the exemplary implementation modes of the present application. For the convenience of description, the dimensions of the various parts shown in the drawings are not drawn according to the actual proportional relationship. Technologies, methods and devices known to those of ordinary skill in the relevant fields may not be discussed in detail, but should be regarded as part of the authorization specification when appropriate. In all the examples shown and discussed here, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0056] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects and are not used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are usually of the same type, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally means an "or" relationship between the associated objects before and after.

[0057] It should be noted that in the description of this application, the orientation or positional relationship indicated by the orientation terms such as "front, rear, top, bottom, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom", etc. is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this application and simplifying the description. Without contrary instructions, these orientation terms do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of this application; the orientation terms "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0058] It should be noted that in this application, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising a..." does not exclude the existence of additional identical elements in the process, method, article or device comprising that element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of this application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, the features described with reference to certain examples may be combined in other examples.

[0059] Embodiment 1

[0060] As Figure 1-2 shown, the sludge screening device includes a drum screen 1, a sand washer 2 and a sediment and sewage separation device 3. The drum screen 1 is used to screen the sediment mixture collected from the river channel and remove large-particle impurities in the sediment mixture; the sand washer 2 is used to wash the sediment mixture after the large-particle impurities are removed by the drum screen 1 and wash the sludge on the surface of the sand; the sediment and sewage separation device 3 is used to separate the sediment and sewage in the sand washer 2. The sediment and sewage separation device 3 includes a chemical pretreatment component 4, and the chemical pretreatment component 4 is used to flocculate the sludge in the sediment and sewage. It also includes a frame 20 and a conveyor belt 11 arranged on the frame 20, a gravity dewatering component 12, a wedge pre-pressing component 13 and a high-pressure extrusion component 14 with gradually increasing dewatering intensity along the conveying direction of the conveyor belt 11.

[0061] The sediment mixture collected from the river channel enters the drum screen 1 for screening. Large particle debris is retained on the filter screen 5 and discharged from the outlet of the drum screen 1. The remaining sediment mixture filters through the filter screen 5 and falls into the receiving box 6 below, then slides into the feed trough 9 of the sand washer 2. The sand washer 2 is a wheel-type sand washer 2. The sediment mixture tumbles and grinds against each other driven by the impeller 8, thereby removing the sludge on the surface of the sand. Then the washed sand falls from the outlet side of the sand washer 2, while the sludge remains in the sewage in the feed trough 9. The sewage in the sand washer 2 needs to be replaced after a certain period of time and cannot be directly discharged. It needs to be subjected to sludge-water separation treatment. First, it undergoes chemical pretreatment through the chemical pretreatment component 4. The sewage is pumped into the reaction cylinder 10, and a flocculant such as polyaluminum chloride is added to the reaction cylinder 10 to flocculate the sludge in the sludge-water mixture. Then it is discharged onto the conveyor belt 11 of the sediment sewage separation device 3. As the conveyor belt 11 conveys, the sludge-water mixture successively passes through the gravity dewatering component 12, the wedge-shaped pre-pressing component 13, and the high-pressure extrusion component 14 for sludge-water separation. Finally, the sludge is dehydrated into a mud cake and discharged from the sediment sewage separation device 3, and the sewage also meets the discharge requirements. The sediment sewage separation device 3 has a gravity dewatering component 12, a wedge-shaped pre-pressing component 13, and a high-pressure extrusion component 14 with gradually increasing dehydration intensities, which can improve the sludge-water separation efficiency and ensure the separation quality.

[0062] Example Two

[0063] As Figure 2-4 shown, the wedge-shaped pre-pressing component 13 includes a first mounting frame 15 and an extrusion plate 16. The first mounting frame 15 is fixedly arranged on the frame 20 and straddles the conveyor belt 11; a plurality of extrusion plates 16 are provided. An extrusion channel 17 is formed between two adjacent extrusion plates 16 arranged in a "V" shape. Along the conveying direction of the conveyor belt 11, the width of the extrusion channel 17 gradually decreases.

[0064] After the sludge-water mixture is dehydrated by the gravity dewatering component 12, it is conveyed to the extrusion channel 17 along the conveyor belt 11. Due to the gradually decreasing width of the extrusion channel 17, it can play a role in extruding the sludge-water mixture.

[0065] Along the conveying direction of the conveyor belt 11, at least two groups of wedge-shaped pre-pressing components 13 are arranged front and back. The extrusion plates 16 of the two groups of wedge-shaped pre-pressing components 13 front and back are staggered with each other in the direction perpendicular to the conveying direction of the conveyor belt 11. The staggered arrangement can enable part of the sludge-water mixture coming out of the non-extrusion channel 17 of the previous group of wedge-shaped pre-pressing components 13 to enter the extrusion channel 17 of the next group of wedge-shaped pre-pressing components 13, so that part of the sludge-water mixture that has not been extruded can also be extruded and dehydrated.

[0066] Example Three

[0067] As Figure 3As shown, the conveyor belt 11 includes a first conveyor belt 18 and a second conveyor belt 19. The first conveyor belt 18 is located below the wedge-shaped pre-pressing assembly 13. The first conveyor belt 18 and the second conveyor belt 19 gradually approach each other on one side of the frame 20 and gradually move away from each other on the other side of the frame 20. The high-pressure extrusion assembly 14 includes an extrusion roller 21 and a liquid receiving tray 22. A plurality of extrusion rollers 21 are arranged along the common transmission path of the first conveyor belt 18 and the second conveyor belt 19, and the diameter of the extrusion rollers 21 gradually decreases along the transmission direction of the conveyor belt 11. The second conveyor belt 19 is tensioned on the surface of the extrusion rollers 21, and the first conveyor belt 18 is tensioned on the side of the second conveyor belt 19 away from the extrusion rollers 21; the liquid receiving tray 22 is arranged below each extrusion roller 21 for receiving the extruded moisture.

[0068] The muddy water mixture is dehydrated by the gravity dehydration assembly 12 and the wedge-shaped pre-pressing assembly 13 on the first conveyor belt 18 and then continues to be transmitted. It falls onto the second conveyor belt 19 at the corner. The muddy water mixture is transmitted between the first conveyor belt 18 and the second conveyor belt 19 and passes through each extrusion roller 21, so that the moisture in the muddy water mixture can be extruded out. The moisture falls into the liquid receiving tray 22, and the mud cake with the moisture extruded out falls from the other side of the frame 20 where the first conveyor belt 18 and the second conveyor belt 19 gradually move away from each other.

[0069] Embodiment Four

[0070] As Figure 2-7 shown, a kneading assembly 23 is correspondingly arranged for the wedge-shaped pre-pressing assembly 13. The kneading assembly 23 is used for kneading the muddy water mixture passing through the extrusion channel 17. By means of the kneading assembly 23, the water outlet efficiency of the muddy water mixture when passing through the wedge-shaped pre-pressing assembly 13 can be increased.

[0071] The kneading assembly 23 includes kneading plates 24, a second mounting frame 25, driving rods 26 and a power assembly. There are two kneading plates 24 in total. The two kneading plates 24 are respectively slidably arranged on the two extrusion plates 16 forming the extrusion channel 17; the second mounting frame 25 is fixedly arranged on the frame 20 and spans the conveyor belt 11 in parallel with the first mounting frame 15. A turntable 27 is rotatably arranged on the second mounting frame 25. A fixing pin 28 is arranged at a non-central position on the end face of the turntable 27 facing the kneading plates 24; each kneading plate 24 corresponds to a driving rod 26 and a turntable 27. One end of the driving rod 26 is rotatably connected to the upper end of the kneading plate 24, and the other end is sleeved on the fixing pin 28 of the turntable 27 and rotatably connected to the positioning pin; the power assembly is used for driving the turntable 27 to rotate in the same direction synchronously. As Figure 9 shown, the positions of the fixing pins 28 on the two turntables 27 corresponding to the two kneading plates 24 of each extrusion channel 17 are always centrosymmetric about the midpoint of the center line connecting the centers of the two turntables 27.

[0072] The power assembly drives the two rotating disks 27 corresponding to the extrusion channel 17 to rotate synchronously in the same direction, so that the positioning pin moves to drive the driving rod 26 to move, thereby driving the kneading plate 24 to slide back and forth on the extrusion plate 16, and the kneading plates 24 on the two extrusion plates 16 are always in a staggered sliding manner with opposite sliding directions, forming a Figure 8 The kneading action of the mud-water mixture transported forward in the extrusion channel 17 can, on the one hand, promote the extrusion and discharge of water, and on the other hand, prevent the mud-water mixture from being blocked at the "eight"-shaped small end of the extrusion channel 17, so that the wedge-shaped preloading component 13 can operate efficiently and reliably.

[0073] Each extrusion channel 17 is correspondingly provided with a group of the above-mentioned kneading components 23, and a transmission gear 29 is fixedly connected to one end of the rotating disk 27 of each kneading component 23 away from the fixing pin 28, and all the kneading components 23 share the same power component, which includes a driving motor 30, a driven gear 31 and a toothed belt 32. The driving motor 30 is fixedly arranged on the second mounting frame 25, and an output gear 33 is arranged at the output end of the driving motor 30; the driven gear 31 is coaxially fixedly connected to one of the rotating disks 27; the toothed belt 32 is tensionedly sleeved on the outside of the transmission gears 29 corresponding to all the rotating disks 27, and the toothed belt 32 is meshed with the transmission gear 29.

[0074] The driving motor 30 is started, driving the output gear 33 and the driven gear 31 to rotate, thereby rotating one of the turntables 27 connected to the driven gear 31, and the transmission gear 29 corresponding to the turntable 27 also rotates circumferentially, and the circumferential rotational motion is transmitted to each transmission gear 29 through the toothed belt 32, so that the turntable 27 of each kneading assembly 23 rotates, and the kneading plate 24 in each extrusion channel 17 performs a kneading action.

[0075] Embodiment 5

[0076] like Figure 10 As shown, a protrusion 34 is provided on one side of the kneading plate 24 away from the squeezing plate 16. The protrusion 34 is similar to a rake and can drive more mud-water mixture to move during the sliding process of the kneading plate 24, thereby increasing the depth of kneading.

[0077] A rubber belt 35 is provided at one end of the extrusion plate 16 toward which the mud and water mixture is transmitted. The rubber belt 35 is elastic. One end of the rubber belt 35 is fixedly connected to the end of the extrusion plate 16 away from the kneading plate 24. The rubber belt 35 bypasses the end of the extrusion plate 16 and the other end is fixedly connected to the end of the kneading plate 24.

[0078] The rubber belt 35 can prevent the mud-water mixture from entering the gap between the squeezing plate 16 and the kneading plate 24 , and can ensure the smooth sliding of the kneading plate 24 .

[0079] The screening method includes the following steps:

[0080] S1: Debris screening. The sediment mixture collected from the river channel enters the drum screen 1 for screening. The drum screen 1 screens out large particle debris to obtain the sediment mixture.

[0081] S2: Sand washing. The sediment mixture enters the wheel sand washer 2 for sand washing to remove the sludge on the surface of the sand, obtaining sand and a muddy water mixture.

[0082] S3: Mud dewatering and solid-liquid separation. The muddy water mixture obtained in S2 is chemically pretreated by the chemical pretreatment component 4 to flocculate the sludge in the muddy water mixture, and then discharged onto the conveyor belt 11 of the sediment sewage separation device 3. Along with the transmission of the conveyor belt 11, the muddy water mixture sequentially passes through the gravity dewatering component 12, the wedge pre-pressing component 13, and the high-pressure extrusion component 14 for solid-liquid separation. Finally, the sludge is dehydrated into a mud cake and discharged from the sediment sewage separation device 3. Among them, while the muddy water mixture is being pre-pressed by the wedge pre-pressing component 13, it is kneaded by the kneading component 23.

[0083] The embodiments of the present application have been described above in conjunction with the accompanying drawings. Without conflict, the embodiments and the features in the embodiments in the present application can be combined with each other. The present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them belong to the protection scope of the present application.

Claims

1. A sediment sewage separation device, characterized in that , used for separating sediment from sewage. The sediment sewage separation device (3) includes a chemical pretreatment component (4), and the chemical pretreatment component (4) is used to flocculate the sludge in the sediment sewage. It also includes a frame (20) and a conveyor belt (11) arranged on the frame (20), a gravity dewatering component (12), a wedge preloading component (13), and a high-pressure extrusion component (14) whose dewatering intensity increases successively along the conveying direction of the conveyor belt (11).

2. The sediment sewage separation device according to claim 1, characterized in that, The wedge preloading component (13) includes: A first mounting frame (15), which is fixedly arranged on the frame (20) and spans across the conveyor belt (11); Extrusion plates (16). There are multiple extrusion plates (16). An extrusion channel (17) is formed between two adjacent extrusion plates (16) arranged in an "eight" shape. Along the conveying direction of the conveyor belt (11), the width of the extrusion channel (17) gradually decreases.

3. The sediment sewage separation device according to claim 2, characterized in that, Along the conveying direction of the conveyor belt (11), there are at least two sets of wedge preloading components (13) arranged front and back. The extrusion plates (16) of the two sets of wedge preloading components (13) front and back are staggered with each other in the direction perpendicular to the conveying direction of the conveyor belt (11).

4. A sediment sewage separation device according to claim 1, characterized in that, The conveyor belt (11) includes a first conveyor belt (18) and a second conveyor belt (19). The first conveyor belt (18) is located below the wedge preloading component (13). The first conveyor belt (18) and the second conveyor belt (19) gradually approach on one side of the frame (20) and gradually move away on the other side of the frame (20). The high-pressure extrusion component (14) includes: Extrusion rollers (21). Multiple extrusion rollers (21) are arranged along the common conveying path of the first conveyor belt (18) and the second conveyor belt (19), and the diameter of the extrusion rollers (21) gradually decreases along the conveying direction of the conveyor belt (11). The second conveyor belt (19) is tensioned on the surface of the extrusion rollers (21), and the first conveyor belt (18) is tensioned on the side of the second conveyor belt (19) away from the extrusion rollers (21); Liquid receiving trays (22), which are arranged below each extrusion roller (21) and are used to receive the extruded moisture.

5. The sediment sewage separation device according to claim 2, characterized in that, A kneading component (23) is correspondingly arranged for the wedge preloading component (13). The kneading component (23) is used to knead the muddy water mixture passing through the extrusion channel (17).

6. The sediment sewage separation device according to claim 5, wherein, The kneading component (23) includes: Kneading plates (24). There are two kneading plates (24) in total. The two kneading plates (24) are respectively slidably arranged on the two extrusion plates (16) forming the extrusion channel (17); A second mounting frame (25), which is fixedly arranged on the frame (20) and spans across the conveyor belt (11) parallel to the first mounting frame (15). A turntable (27) is rotatably arranged on the second mounting frame (25). A fixing pin (28) is arranged at a non-central position on the end face of the turntable (27) facing the kneading plate (24); A driving rod (26), each kneading plate (24) has a corresponding driving rod (26) and a rotating disk (27), one end of the driving rod (26) is rotatably connected to the upper end of the kneading plate (24), and the other end is sleeved on a fixing pin (28) of the rotating disk (27) and rotatably connected to a positioning pin; A power assembly is used to drive the turntable (27) to rotate synchronously in the same direction, and the positions of the fixing pins (28) on the two turntables (27) corresponding to the two kneading plates (24) of each extrusion channel (17) are always symmetrical about the center of the midpoint of the line connecting the centers of the two turntables (27).

7. The sediment sewage separation device according to claim 6, characterized in that, Each extrusion channel (17) is correspondingly provided with a group of the above-mentioned kneading components (23), and one end of the rotating disk (27) of each kneading component (23) away from the fixing pin (28) is fixedly connected to a transmission gear (29), and all the kneading components (23) share the same power component, which includes: A driving motor (30), wherein the driving motor (30) is fixedly mounted on the second mounting frame (25), and an output gear (33) is disposed at an output end of the driving motor (30); A driven gear (31), wherein the driven gear (31) is coaxially fixedly connected to one of the rotating disks (27); A toothed belt (32) is tensionedly sleeved outside the transmission gears (29) corresponding to all the rotating disks (27), and the toothed belt (32) is meshed with the transmission gears (29).

8. An apparatus for separating sediment and sewage according to claim 6, characterized in that, A protrusion (34) is provided on the side of the kneading plate (24) away from the squeezing plate (16).

9. A sediment sewage separation device according to claim 6, characterized in that, A rubber belt (35) is provided at one end of the extrusion plate (16) toward which the mud-water mixture is transmitted. The rubber belt (35) is elastic. One end of the rubber belt (35) is fixedly connected to one end of the extrusion plate (16) away from the kneading plate (24). The rubber belt (35) bypasses the end of the extrusion plate (16) and the other end is fixedly connected to the end of the kneading plate (24).

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