An automatic sludge dewatering and filtering device and a dewatering and filtering method

Abstract

The application discloses an automatic sludge dewatering and filtering device and a dewatering and filtering method. The device comprises a mounting frame, a support frame fixedly installed on the lower end of the mounting frame, a first driving motor installed on the right middle part of the support frame, a conveying belt connected to the output end of the first driving motor and located on the inner side of the support frame, a dewatering and filtering box fixedly installed on the inner end of the mounting frame, a connecting frame installed on the inner side of the upper end of the dewatering and filtering box, a connecting block fixedly installed on the upper end edge of the connecting frame, a second driving motor installed on the right upper surface of the mounting frame, and a filtering cylinder installed on the inner side of the connecting frame and located in the mounting frame. The automatic sludge dewatering and filtering device and the dewatering and filtering method have a good automatic discharging and collecting function for sludge after dewatering and filtering, improve the convenience of collection, and can double dewater and filter the sludge, so that the effect of removing water from the sludge is improved.

Description

Technical Field

[0001] This invention relates to the technical field of sludge dewatering and filtration, specifically to an automatic sludge collection dewatering and filtration device and a dewatering and filtration method. Background Technology

[0002] Sludge is a byproduct of wastewater treatment. It is an extremely complex heterogeneous body composed of organic debris, bacterial cells, inorganic particles, colloids, etc. It is prone to putrefaction and odor, and its particles are relatively fine. Sludge dewatering and filtration is a sludge treatment method that removes water from fluidized raw, concentrated, or digested sludge, transforming it into semi-solid or solid sludge blocks. Depending on the properties of the sludge and sediment and the efficiency of the dewatering equipment, the moisture content of the sludge after dewatering and filtration can be reduced to 55% to 80%.

[0003] Chinese Patent Publication No. CN110204167B discloses an integrated sludge dewatering device, relating to the field of wastewater treatment equipment. The device includes a dewatering body with a filter belt connected internally via a pair of conveyor rollers. A pressure roller dewatering device is positioned directly above the center of the filter belt. This device comprises a compression rod assembly, a pressure roller base plate, and pressure rollers. Warm air vents are located on both sides of the dewatering body away from the end with the hopper, and a warm air blower is positioned close to the outer side of these vents. In this invention, the multiple pressure rollers of the pressure roller dewatering device are in tight rolling contact with multiple support rollers under the action of the compression rod assembly. Simultaneously, a drive motor drives the multiple pressure rollers. The sludge transported by the filter belt and passing between the pressure rollers and support rollers is squeezed, causing its internal moisture to be released. When the warm air blower is working, it dries the sludge transported by the filter belt through the warm air vents, further drying the squeezed sludge and improving drying efficiency.

[0004] Chinese Patent Publication No. CN107162377B discloses a sludge dewatering device, including a housing. A feed hopper is fixedly connected to one side of the top of the housing, and a feed pipe is connected to the bottom of the feed hopper. The bottom end of the feed pipe penetrates the top of the housing and extends into the interior of the housing. A filter box is fixedly connected to one side of the bottom of the inner wall of the housing, and a water outlet pipe penetrates one side of the outer housing. A filter plate is installed inside the filter box, and a drain pipe penetrates one side of the filter box. This invention relates to the field of wastewater treatment technology. This sludge dewatering device simplifies sludge filtration by incorporating a filter screen inside the filter bucket. The filter bucket extends through the bottom of the outer housing, penetrating the working chamber and extending into its interior, facilitating the dewatering process. A motor housing is fixedly connected to the output shaft of a hydraulic cylinder, improving the extraction of water from the sludge.

[0005] Most existing technical solutions have the following drawbacks: they do not have a good automatic discharge function for the sludge after dewatering and filtration, which makes subsequent collection cumbersome. At the same time, the dewatering and filtration structure is relatively simple, which can easily affect the effect of removing water from the sludge. Therefore, we provide an automatic sludge dewatering and filtration device and a dewatering and filtration method to solve the problems mentioned above. Summary of the Invention

[0006] The purpose of this invention is to provide an automatic sludge collection dewatering and filtration device and a dewatering and filtration method to solve the problems mentioned in the background art, such as the lack of a good automatic discharge function for the dewatered and filtered sludge, which leads to cumbersome subsequent collection, and the relatively simple dewatering and filtration structure, which easily affects the effect of removing water from the sludge.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an automatically collected sludge dewatering and filtration device and a dewatering and filtration method, comprising:

[0008] The mounting frame has a support frame fixedly installed on its lower outer side, and a first drive motor is installed in the middle of the right side of the support frame. The output end of the first drive motor is connected to a conveyor belt located inside the support frame. A dewatering filter box is fixedly installed on the inner side of the mounting frame, and a connecting frame is installed on the inner side of the upper end of the dewatering filter box.

[0009] A connecting block is fixedly installed at the upper edge of the connecting frame. A second drive motor is installed on the upper right surface of the mounting frame, and the output end of the second drive motor is connected to a transmission rod. A transmission wheel located outside the connecting block is fixedly installed on the outer side of the transmission rod.

[0010] The filter cartridge is installed inside the connecting frame and located within the mounting frame. A valve body is provided at the lower end of the filter cartridge. A limit strip is fixedly installed on the outer surface of the filter cartridge, and a sealing cover is installed on the outer side of the upper end of the filter cartridge via a hinge.

[0011] The first guide plate is fixedly installed in the middle of the inner side of the dewatering filter box, and a fixed extrusion plate located in the same mounting frame is provided below the first guide plate. A filter screen is embedded inside the fixed extrusion plate, and a drain pipe is installed in the middle of the rear end of the dewatering filter box.

[0012] The second guide plate is fixedly installed on the inner wall of the dewatering filter box, and a squeezing assembly is provided below the second guide plate. The squeezing assembly includes a moving squeezing plate, a limiting block, a first pre-made hole, a fixing block, and a first spring. An electric hydraulic rod located inside the dewatering filter box is bolted to the middle of the front end of the squeezing assembly, and a closing assembly is provided on the outer side of the middle of the lower end of the dewatering filter box. The closing assembly includes a closing plate, a pre-made groove, a second pre-made hole, and a second spring.

[0013] Preferably, the inner wall end of the connecting frame is provided with an installation groove that matches the limiting strip, and the connecting block at the outer edge of the connecting frame is connected to the transmission wheel by meshing.

[0014] Preferably, the limiting strip is connected to the mounting groove by an insertion method and plays a role in positioning and installing the filter cylinder, and the filter cylinder has a perforated structure with equal spacing inside.

[0015] Preferably, the lower end of the first guide plate is inclined outward, and the diameter of the first guide plate is larger than the diameter of the lower end of the filter cartridge, thus facilitating the insertion of the lower end of the filter cartridge.

[0016] Preferably, the fixed extrusion plate and the extrusion assembly are both fixedly installed with extrusion blocks on the side near the central axis of the dewatering filter box, and the upper end of the fixed extrusion plate is inclined, the filter screen is located directly in front of the drain pipe, and the bottom rear side of the dewatering filter box is inclined.

[0017] Preferably, limit blocks are fixedly installed on the outer sides of both the left and right ends of the moving extrusion plate, and a first pre-made hole is opened inside the limit block. Fixing blocks are installed through the upper and lower ends of the first pre-made hole, and a first spring located inside the limit block is connected to the outer side of the fixing block.

[0018] Preferably, the left and right walls of the closed plate are provided with prefabricated grooves, and a second prefabricated hole is provided on the lower rear side of the prefabricated groove. A second spring located in the dewatering filter box is provided on the outer rear side of the closed plate.

[0019] Preferably, the limiting block is connected to the closing plate by a sliding manner through a pre-made groove, and the longitudinal section of the closing plate is "L"-shaped. The fixing block forms a telescopic structure within the limiting block by a first spring, and the fixing block is connected to the closing plate by a snap-fit ​​manner through a second pre-made hole.

[0020] Preferably, the closing plate forms a telescopic structure inside the lower end of the support frame through a second spring, and the connection between the closing plate and the dewatering filter box is provided with a sealing structure to compensate for the connection gap.

[0021] Preferably, the dehydration filtration method includes the following steps:

[0022] Step 1: Install the filter cartridge into the connecting frame according to the corresponding steps, then open the dewatering filter box, inject the sludge to be dewatered and filtered into the filter cartridge, then close the sealing cover and lock the sealing cover by using the locking structure that matches the sealing cover and the filter cartridge.

[0023] Step 2: Start the second drive motor, which drives the connecting frame and filter cylinder to rotate within the mounting frame via the transmission wheel and connecting block. This facilitates the rotational dewatering and filtration of the sludge in the filter cylinder. At the same time, the first guide plate guides the water filtered out by the rotation, making it easy to collect through the drain pipe.

[0024] Step 3: Open the valve body to allow the sludge after rotary dewatering to fall into the lower end of the dewatering filter box. Then start the electric hydraulic rod to drive the squeezing component to move backward, which facilitates the squeezing and dewatering of the sludge after rotary dewatering. At the same time, the squeezed water is filtered through the filter screen and discharged into the drain pipe.

[0025] Step 4: After the extrusion is complete, the closing component slides forward and opens under the drive of the extrusion component, so as to facilitate the discharge of the fully dewatered and filtered sludge onto the conveyor belt.

[0026] Compared with the prior art, the beneficial effects of the present invention are: the automatic collection sludge dewatering and filtration device and dewatering and filtration method have a better automatic discharge and collection function for the dewatered and filtered sludge, which improves the convenience of collection. At the same time, it can perform double dewatering and filtration on the sludge, thereby facilitating the improvement of the dewatering effect on the sludge.

[0027] 1. The device is equipped with a closing plate, a second spring, and a first spring. The limiting block is connected to the closing plate in a sliding manner under the action of the pre-made groove. The fixing block forms a telescopic structure within the limiting block through the first spring. At the same time, the fixing block is connected to the closing plate in a snap-fit ​​manner through the second pre-made hole. After extrusion, the electric hydraulic rod is activated, which shortens the electric hydraulic rod to the designated position. At this time, the second spring is not fully extended and drives the moving extrusion plate to move forward. At this time, the closing plate moves synchronously with the moving extrusion plate under the action of the first spring, which can open the discharge port opened in the middle of the lower end of the dewatering filter box. This facilitates the discharge of fully dewatered and filtered sludge onto the conveyor belt. It has a good automatic discharge and collection function for dewatered and filtered sludge, which improves the convenience of collection.

[0028] 2. It is equipped with a connecting frame, a connecting block and a filter cylinder. By starting the second drive motor, the second drive motor drives the transmission rod and transmission wheel to rotate. While the transmission wheel is rotating, it engages with the connecting block, so as to facilitate the synchronous rotation of the connecting block, the connecting frame and the filter cylinder in the mounting frame. This facilitates the rotary dewatering and filtration of sludge in the filter cylinder. At this time, the first guide plate can guide the water filtered by rotary dewatering, so as to facilitate collection through the drain pipe and prevent water from dripping into the lower end of the dewatering filter box.

[0029] 3. Equipped with a moving extrusion plate, an electro-hydraulic rod, and extrusion blocks, the electro-hydraulic rod extends, causing the moving extrusion plate to move backward within the dewatering filter box. During this movement, the sludge is pushed and squeezed by the moving extrusion plate, coming into contact with the extrusion blocks, the filter screen, and the fixed extrusion plate. The extrusion blocks on the fixed and moving extrusion plates are staggered, increasing the contact area between the extrusion blocks and the sludge, thus further improving the dewatering effect. Since the filter screen is located directly in front of the drain pipe, and the bottom rear of the dewatering filter box is inclined, the water generated during extrusion can be filtered through the filter screen. The filtered water can then be discharged through the drain pipe, thus enabling dual dewatering and filtration of the sludge, thereby improving the water removal efficiency. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 This is an exploded view of the overall structure of the filter cartridge and connecting frame of the present invention.

[0032] Figure 3 This is a schematic cross-sectional view of the connection between the dehydration filter box and the first guide plate of the present invention.

[0033] Figure 4 This is a schematic diagram of the overall structure connecting the extrusion component and the closing component of the present invention;

[0034] Figure 5 This is a schematic diagram of a partial overall structure of the extrusion assembly of the present invention;

[0035] Figure 6 For the present invention Figure 1 Enlarged structural diagram at point A in the middle;

[0036] Figure 7 For the present invention Figure 3 Enlarged structural diagram at point B.

[0037] In the diagram: 1. Mounting frame; 2. Support frame; 3. First drive motor; 4. Conveyor belt; 5. Dewatering filter box; 6. Connecting frame; 7. Mounting groove; 8. Connecting block; 9. Second drive motor; 10. Transmission rod; 11. Transmission wheel; 12. Filter cylinder; 13. Valve body; 14. Limiting strip; 15. Sealing cover; 16. First guide plate; 17. Fixed extrusion plate; 18. Filter screen; 19. Extrusion block; 20. Drain pipe; 21. Second guide plate; 22. Extrusion assembly; 2201. Moving extrusion plate; 2202. Limiting block; 2203. First pre-drilled hole; 2204. Fixing block; 2205. First spring; 23. Electro-hydraulic rod; 24. Closing assembly; 2401. Closing plate; 2402. Pre-drilled groove; 2403. Second pre-drilled hole; 2404. Second spring. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] Please see Figure 1-7 This invention provides a technical solution: an automatic sludge collection dewatering and filtration device and method, comprising a support frame 2 fixedly installed on the lower outer side of a mounting frame 1, a first drive motor 3 installed on the middle right side of the support frame 2, the output end of the first drive motor 3 connected to a conveyor belt 4 located inside the support frame 2, a dewatering filter box 5 fixedly installed on the inner side of the mounting frame 1, a connecting frame 6 installed on the upper inner side of the dewatering filter box 5, a connecting block 8 fixedly installed at the upper edge of the connecting frame 6, and a connecting block 8 fixedly installed on the upper right side of the mounting frame 1. A second drive motor 9 is mounted on the surface, and the output end of the second drive motor 9 is connected to a transmission rod 10. A transmission wheel 11 located outside the connecting block 8 is fixedly mounted on the outer side of the transmission rod 10. The filter cylinder 12 is mounted on the inner side of the connecting frame 6 and located inside the mounting frame 1. A valve body 13 is provided at the lower end of the filter cylinder 12. A limit strip 14 is fixedly mounted on the outer surface of the filter cylinder 12. A sealing cover 15 is mounted on the outer side of the upper end of the filter cylinder 12 through a hinge. An installation groove 7 that matches the limit strip 14 is opened on the inner wall end of the connecting frame 6.

[0040] Meanwhile, the first guide plate 16 is fixedly installed in the middle of the inner side of the dewatering filter box 5, and a fixed extrusion plate 17, also located in the mounting bracket 1, is provided below the first guide plate 16. A filter screen 18 is embedded inside the fixed extrusion plate 17. Extrusion blocks 19 are fixedly installed on the side of the fixed extrusion plate 17 and the extrusion assembly 22 near the central axis of the dewatering filter box 5. A drain pipe 20 is installed in the middle of the rear end of the dewatering filter box 5. The second guide plate 21 is fixedly installed on the inner wall of the dewatering filter box 5, and an extrusion assembly 22 is provided below the second guide plate 21. The extrusion assembly 22 includes a moving extrusion plate 2201, a limiting block 2202, a first pre-drilled hole 2203, a fixing block 2204, and a first spring 2205. Limiting blocks 2202 are fixedly installed on the outer sides of both the left and right ends of the moving extrusion plate 2201, and the limiting block 2202 has a first pre-drilled hole inside. A hole 2203 is formed, and a fixing block 2204 is provided through both the upper and lower ends of the first pre-formed hole 2203. A first spring 2205 located in the limiting block 2202 is connected to the outside of the fixing block 2204. An electric hydraulic rod 23 located in the dewatering filter box 5 is installed in the middle of the front end of the extrusion assembly 22 by bolts. A closing assembly 24 is provided on the outer side of the middle of the lower end of the dewatering filter box 5. The closing assembly 24 includes a closing plate 2401, a pre-formed groove 2402, a second pre-formed hole 2403, and a second spring 2404. The pre-formed groove 2402 is provided through both the left and right walls of the closing plate 2401. A second pre-formed hole 2403 is provided on the lower side of the rear end of the pre-formed groove 2402. A second spring 2404 located in the dewatering filter box 5 is provided on the outer side of the rear end of the closing plate 2401. The combination constitutes an automatically collected sludge dewatering filter device.

[0041] When using this automatically collected sludge dewatering and filtration device, specifically as follows: Figure 1 , Figure 2 and Figure 3 As shown, the entire assembly is first stably placed on the designated plane using the support frame 2. Then, the filter cartridge 12 is installed into the connecting frame 6 according to the corresponding steps. Since the inner wall of the connecting frame 6 has an installation groove 7 that matches the limiting strip 14, and the limiting strip 14 and the installation groove 7 are connected by a plug-in connection, and the filter cartridge 12 has evenly spaced through-holes, during installation, the limiting strip 14 is inserted into the matching installation groove 7. At this time, the limiting strip 14 and the installation groove 7 provide good positioning for the filter cartridge 12, facilitating its installation into the connecting frame 6 and inserting the lower end of the filter cartridge 12 into the first guide plate 16. Then, the dewatering filter box 5 is opened, and the sludge to be dewatered and filtered is injected into the filter cartridge 12. Then, the sealing cover 15 is closed and locked using the locking structure that matches the sealing cover 15 and the filter cartridge 12. Figure 6As shown, the second drive motor 9 is started, which drives the transmission rod 10 and the transmission wheel 11 to rotate. While rotating, the transmission wheel 11 engages with the connecting block 8, which facilitates the synchronous rotation of the connecting block 8, the connecting frame 6 and the filter cylinder 12 within the mounting frame 1. This facilitates the rotary dewatering and filtration of the sludge in the filter cylinder 12. At this time, the first guide plate 16 can guide the water filtered by the rotary dewatering, which can be collected through the drain pipe 20 to prevent water from dripping into the lower end of the dewatering filter box 5.

[0042] Specific examples Figure 1 , Figure 3 and Figure 4 As shown, after the rotary dewatering filtration is completed, the valve body 13 and the electric hydraulic rod 23 are activated, so that the sludge in the filter cylinder 12 is injected into the lower middle part of the dewatering filter box 5 under the guidance of the second guide plate 21 and the fixed extrusion plate 17. At this time, the electric hydraulic rod 23 extends and drives the moving extrusion plate 2201 to move backward in the dewatering filter box 5. At this time, the sludge is pushed and squeezed by the moving extrusion plate 2201 and comes into contact with the extrusion block 19, the filter screen 18 and the fixed extrusion plate 17 respectively. The extrusion block 19 on the fixed extrusion plate 17 and the extrusion block 19 on the moving extrusion plate 2201 are arranged in an alternating manner, so that the extrusion block 19 can increase the contact area with the sludge, which facilitates further improvement of the dewatering effect of the sludge. Since the filter screen 18 is located in front of the drain pipe 20 and the bottom rear side of the dewatering filter box 5 is inclined, the water generated by the extrusion can be filtered through the filter screen 18, and the filtered water can be discharged through the drain pipe 20.

[0043] Specific examples Figure 4 , Figure 5 and Figure 6As shown, since the limiting block 2202 is slidably connected to the closing plate 2401 through the prefabricated groove 2402, and the fixing block 2204 forms a telescopic structure within the limiting block 2202 through the first spring 2205, and the fixing block 2204 is also connected to the closing plate 2401 through the second prefabricated hole 2403 in a snap-fit ​​manner, when the moving extrusion plate 2201 extrudes the sludge under the drive of the electric hydraulic rod 23, the limiting block 2202 slides on the left and right sides of the closing plate 2401 through the prefabricated groove 2402. At this time, the first spring 2205 is in a compressed state. When the moving extrusion plate 2201 moves to the rearmost end, the first spring 2205 moves to the second prefabricated hole 2403, at which point the first spring 2205 returns to its original state and respectively... The two sets of fixed blocks 2204 generate a force away from the central axis of the limiting block 2202, so that the first spring 2205 can be tightly engaged with the closing plate 2401 through the second pre-made hole 2403. Then, the electric hydraulic rod 23 is activated, and the electric hydraulic rod 23 is shortened to the specified position. At this time, the second spring 2404 is not fully stretched, and it drives the moving extrusion plate 2201 to move forward. At this time, the closing plate 2401 moves synchronously with the moving extrusion plate 2201 under the action of the first spring 2205, so as to open the discharge port opened in the middle of the lower end of the dewatering filter box 5, and facilitate the discharge of the fully dewatered and filtered sludge onto the conveyor belt 4, so as to facilitate the collection of sludge by the conveyor belt 4. While the closing plate 2401 is moving, the second spring 2404 is stretched.

[0044] After all the sludge is discharged, the electric hydraulic rod 23 continues to drive the extrusion plate 2201 to move. When the second spring 2404 is fully stretched, it rebounds. At this time, the first spring 2205 separates from the second pre-drilled hole 2403 under the force of the second spring 2404. The closing plate 2401 returns to its original position, thus facilitating the closure of the discharge port at the lower middle part of the dewatering filter box 5. The dewatering filtration method includes the following steps: Step 1: Install the filter cylinder 12 into the connecting frame 6 through the corresponding steps, then open the dewatering filter box 5, inject the sludge to be dewatered into the filter cylinder 12, and then close the sealing cover 15 and lock it by means of the locking structure that matches the sealing cover 15 and the filter cylinder 12; Step 2: Start the second drive motor 9. The second drive motor 9 drives the connecting frame 6 and filter cylinder 12 to rotate within the mounting frame 1 via the transmission wheel 11 and connecting block 8, facilitating the rotational dewatering and filtration of the sludge in the filter cylinder 12. Simultaneously, the first guide plate 16 guides the water from the rotating filter, facilitating collection through the drain pipe 20. Step three: Open the valve body 13, allowing the dewatered sludge to fall into the lower end of the dewatering filter box 5. Then, activate the electric hydraulic rod 23, causing it to move the extrusion assembly 22 backward, facilitating the extrusion and dewatering of the dewatered sludge. Simultaneously, the extruded water is filtered through the filter screen 18 and discharged into the drain pipe 20. Step four: After extrusion, the closing assembly 24 slides forward and opens under the drive of the extrusion assembly 22, facilitating the discharge of the fully dewatered and filtered sludge onto the conveyor belt 4.

[0045] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0046] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An automatically collected sludge dewatering filter apparatus, characterized by, The utility model provides a kind of dehydration filter device, including: Mounting frame, support frame is fixedly installed on the outside of lower end, and the right side middle part of support frame is installed with first drive motor, the output end of first drive motor is connected with the conveyer belt in the inside of support frame, the inside end of mounting frame is fixedly installed with dehydration filter box, and the inside of upper end of dehydration filter box is installed with link frame; Link block is fixedly installed on the upper end edge of link frame, the right side upper surface of mounting frame is installed with second drive motor, and the output end of second drive motor is connected with transmission rod, and the outside of transmission rod is fixedly installed with transmission wheel in the outside of link block, and link block and transmission wheel are connected in meshing mode on the outside edge of link frame; Filter cartridge is installed in the inside of link frame and located in mounting frame, and valve body is provided on the lower end of filter cartridge, limiting strip is fixedly installed on the outer surface of filter cartridge, and sealing cover is installed on the outside of upper end of filter cartridge by hinge; First deflector is fixedly installed on the inside middle part of dehydration filter box, and fixed extrusion plate is provided below first deflector and also located in mounting frame, filter screen is embedded in the inside of fixed extrusion plate, drain pipe is installed on the rear end middle part of dehydration filter box, and first deflector guides water filtered by rotation, to facilitate collection through drain pipe; Second deflector is fixedly installed on the inside wall end of dehydration filter box, and extrusion assembly is provided below second deflector, and extrusion assembly includes movable extrusion plate, limiting block, first prefabricated hole, fixed block and first spring, electric hydraulic rod is installed on the inside of dehydration filter box by bolt on the middle part of front end of extrusion assembly, and closing assembly is provided on the outside of lower end middle part of dehydration filter box, and closing assembly includes closing plate, prefabricated groove, second prefabricated hole and second spring; Second spring is provided on the outside of rear end of closing plate and located in dehydration filter box; Limiting block is connected with closing plate in sliding mode through prefabricated groove, and the longitudinal section of closing plate is in the shape of "L", and fixed block constitutes telescopic structure in limiting block through first spring, and fixed block is connected with closing plate in clamping mode through second prefabricated hole; Closing plate constitutes telescopic structure in the inside of lower end of support frame through second spring, and sealing structure is provided on the connection of closing plate and dehydration filter box and plays the role of compensation for connection gap.

2. An automatically collected sludge dewatering filter apparatus according to claim 1, characterized in that: The inside wall end of link frame is provided with mounting groove consistent with limiting strip.

3. An automatically collected sludge dewatering filter apparatus as claimed in claim 2, wherein: Limiting strip and mounting groove are connected in plug-in mode and play the role of positioning installation for filter cartridge, and hole structure is provided in the inside of filter cartridge at equal intervals.

4. An automatically collected sludge dewatering filter apparatus as claimed in claim 1, wherein: The lower end of first deflector is provided in outward inclination, and the diameter size of first deflector is greater than the diameter size of lower end of filter cartridge and plays the role of facilitating insertion of lower end of filter cartridge.

5. An automatic collected sludge dewatering filter apparatus as claimed in claim 1, wherein: Extrusion block is fixedly installed on the side close to the central axis of dehydration filter box for fixed extrusion plate and extrusion assembly, the upper end of fixed extrusion plate is provided in inclination, filter screen is located in front of drain pipe, and the bottom rear side of dehydration filter box is provided in inclination.

6. An automatically collected sludge dewatering filter apparatus as claimed in claim 1, wherein: The outer side of the left and right ends of the movable extrusion plate is fixedly installed with a limiting block, a first prefabricated hole is arranged in the limiting block, and a fixed block is arranged at the upper and lower ends of the first prefabricated hole.

7. The automatic collected sludge dewatering and filtering device according to claim 1, wherein the dewatering and filtering method comprises the following steps: Step one: install the filter cartridge in the connecting frame through the corresponding steps, then open the dewatering and filtering box, pour the sludge to be dewatered and filtered into the filter cartridge, then close the sealing cover and lock the sealing cover through the locking structure on the sealing cover and the filter cartridge; Step two: start the second driving motor, so that the second driving motor drives the connecting frame and the filter cartridge to rotate in the mounting frame through the transmission wheel and the connecting block, facilitating the rotation dewatering and filtering of the sludge in the filter cartridge; Step three: open the valve body, so that the sludge after rotation dewatering falls into the lower end of the dewatering and filtering box, then start the electric hydraulic rod, so that the electric hydraulic rod drives the extrusion assembly to move backward, facilitating the extrusion dewatering of the sludge after rotation dewatering, and the water extruded is filtered through the filter screen and discharged into the drain pipe; Step four: after extrusion, the closing assembly is driven by the extrusion assembly to slide forward and open, so as to facilitate the discharge of the fully dewatered and filtered sludge onto the conveyor belt.

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