Municipal sludge full-chain deep treatment device and process

Abstract

The invention relates to the technical field of sludge deep dehydration equipment, in particular to a municipal sludge full-chain deep treatment device and process, and the process comprises the following steps: S100, adding a flocculating agent into sludge with the water content of 98%-99%, stirring and mixing, introducing into a stacked screw type filter press, and primarily dehydrating the sludge to form primary sludge with the water content of 83%-87%; s200, introducing the primary sludge in the step S100 into a conditioning tank, adding a sludge conditioner, and mixing and stirring to form secondary sludge; s300, the secondary sludge in the step S200 is introduced into a distributor in a high-pressure filter press, and in the secondary sludge introduction process, a buzzer drives a tuning fork to vibrate to flatly lay the sludge in the distributor; s400, after the secondary sludge in the distributing device reaches a set height, a power motor rotates to drive a conveying steel belt to move so as to move the distributing device to the position under a filter pressing plate; and S500, the filter pressing oil cylinder stretches out to drive the filter pressing plate to move downwards so as to extrude the sludge for dehydration, and after extrusion dehydration is completed, the pressure of the filter pressing oil cylinder is maintained for 1-2 min.

Description

Technical Field

[0001] The invention relates to the technical field of sludge deep dehydration equipment, and in particular to a municipal sludge full-chain deep treatment device and process. Background Art

[0002] Sludge treatment refers to the process of reducing, stabilizing, detoxifying and recycling the sludge generated during sewage treatment.

[0003] Municipal sludge deep dehydration treatment is a technology that removes water from sludge by physical, chemical or biological methods to reduce the water content of sludge. The water content of municipal sludge is usually high, generally above 80%, or even close to 90%. Sludge with high water content is large in volume and poor in stability, difficult to directly dispose of or use, and easily causes secondary pollution. Currently commonly used sludge dehydration equipment mainly includes belt filter press, plate and frame filter press, stacked screw sludge dehydrator, centrifugal dehydrator, vacuum filtration dehydrator, etc., but the dehydration rate is fast using the above method, but the dehydration effect is relatively weak. For example, the prior application with publication number CN113443808A discloses a sludge dehydration device, which realizes deep dehydration by acting on the sludge through a hydraulic device, but the above device is not flexible enough, resulting in low dehydration efficiency.

[0004] Therefore, those skilled in the art are committed to developing a full-chain deep disposal device and process for municipal sludge, which is conducive to the rapid deep dehydration of municipal sludge and improves the dehydration efficiency of municipal sludge. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a municipal sludge full-chain deep treatment device and process, which is conducive to rapid deep dehydration of municipal sludge and improves the dehydration efficiency of municipal sludge. The technical solution of the present invention to solve the above technical problems is as follows: A full-chain deep treatment process for municipal sludge comprises the following steps: S100. The sludge having a water content of 98% to 99% is added with a flocculant and mixed and then introduced into a stacked screw filter press to initially dehydrate the sludge to form a preliminary sludge having a water content of 83% to 87%; S200. The preliminary sludge in step S100 is introduced into a conditioning tank, and a sludge conditioning agent is added and mixed to form secondary sludge; S300. The secondary sludge in step S200 is introduced into the distributor in the high-pressure filter press. During the introduction of the secondary sludge, the buzzer drives the tuning fork to vibrate and lay the sludge in the distributor evenly; S400. After the secondary sludge in the distributor reaches the set height, the power motor rotates to drive the conveyor belt to move the distributor to the bottom of the filter press plate; S500. The filter press cylinder extends to drive the filter press plate to move downward to squeeze the sludge for dehydration. After the squeezing and dehydration are completed, the filter press cylinder maintains pressure for 1 to 2 minutes; S600. After the extrusion is completed, the power motor rotates to drive the conveyor belt to move the distributor. When the lower end of the distributor gradually breaks away from the conveyor belt and the distributor still moves horizontally, the extruded sludge is discharged from the lower end of the distributor under the action of gravity; After the sludge is squeezed out, the power motor reverses to move the distributor to the initial position, waiting for the next secondary sludge to be introduced, and the cycle continues.

[0006] The beneficial effects of adopting the above scheme are: the process realizes the full chain deep dehydration of municipal sludge through multi-stage treatment steps such as conditioning, stacked screw filter press, flattening, and filter press, and can significantly reduce the moisture content of sludge to meet the requirements of deep dehydration; The pressure-maintaining step can fully discharge the water in the sludge, avoid water backflow caused by too fast pressure release, and ensure that the moisture content of the dehydrated sludge is low and uniform.

[0007] Based on the above technical solution, the present invention can also be improved as follows.

[0008] Further, in step S100, the flocculant added is polyacrylamide; in step S200, the sludge conditioning agent added to the conditioning tank is polyaluminum-iron double salt; The amount of flocculant added is 0.3‰-1‰ of the dry sludge mass, and the amount of sludge conditioner added is 5%-20% of the dry sludge mass.

[0009] The beneficial effects of adopting the above further scheme are: by adjusting the pH value, sludge can be converted into valuable resources, the resource utilization rate of sludge can be improved, the pollution of sludge to the environment can be reduced, the environmental friendliness of sludge treatment can be improved, the amount of front-end pre-dehydration flocculant used can be reduced, the cost of chemicals can be saved, the front-end pre-dehydration requirements can be reduced, and the operating efficiency can be improved.

[0010] A municipal sludge full-chain deep treatment device, applied to the municipal sludge full-chain deep treatment process as described above, comprises a high-pressure filter press, the input end of the high-pressure filter press is connected to a stacked screw filter press, and the output end of the high-pressure filter press is connected to a dry sludge silo; The high-pressure filter press comprises a conveying roller assembly, a distributor, a flattening assembly and a filter press assembly, wherein the conveying roller assembly is mounted on a frame and has a conveying steel belt, the distributor is located on the conveying steel belt and one side of the distributor is hinged to the conveying steel belt, and the conveying roller assembly drives the distributor to move horizontally; The distributor is also connected to a guide assembly; The flattening assembly and the filter press assembly are both installed on the frame, the flattening assembly is used to flatten the sludge in the distributor, and the filter press assembly is used to squeeze and dehydrate the sludge in the distributor.

[0011] The beneficial effect of adopting the above further scheme is that the municipal sludge is first dehydrated by the stacked screw filter press and then deeply dehydrated by the high-pressure filter press. This combination can effectively improve the dehydration efficiency of the sludge, significantly reduce the water content of the sludge, and meet the requirements of deep dehydration of municipal sludge. The hinged design of the distributor and the conveyor steel belt and the connection of the guide assembly make the distributor more stable during movement. At the same time, the cooperation of the guide assembly and the conveyor roller assembly makes the distributor suspended in the air, which is conducive to the rapid discharge of the mud cake after dehydration and squeezing. The extrusion force of the filter press assembly is adjusted according to different sludges to achieve dehydration of different sludge depths and realize multiple uses of one machine.

[0012] Further, the conveying roller assembly includes a first conveying roller and a second conveying roller, both ends of the first conveying roller and the second conveying roller are installed on the supporting beam through mounting bearings, the supporting beam is horizontally connected to the frame, and the conveying steel belt is sleeved on the outside of the first conveying roller and the second conveying roller; A worm gear is installed at the end of the first conveying roller or the second conveying roller, a power motor is installed on the supporting crossbeam, and a worm matched with the worm gear is installed at the output end of the power motor.

[0013] The beneficial effects of adopting the above further scheme are: the power motor realizes stable power output through worm gear transmission, ensuring the smooth operation of the conveying steel belt, and the worm gear transmission has a self-locking function, which can effectively prevent slipping or reversing during the conveying process, thereby improving the reliability of the equipment operation; The worm gear assembly is installed on the supporting beam to avoid interference of the power motor and chain on the movement of other parts.

[0014] Furthermore, a support block is provided at the lower side of the conveyor steel belt, the upper end surface of the support block abuts against the lower side of the conveyor steel belt, both ends of the support block are horizontally connected to the frame, and a water leakage hole is provided on the support block.

[0015] The beneficial effect of adopting the above further scheme is: the support block is used to withstand the pressure of the filter press assembly on the conveyor steel belt, preventing it from sagging or deforming during operation, ensuring the smoothness of the conveying process, so that the moisture in the sludge is quickly squeezed out and flows out from the gaps in the steel belt, and is discharged into the sewage collection bin through the leakage hole.

[0016] Furthermore, the distributor is open at both ends and is in a hollow cylindrical shape, the outer wall of the distributor is provided with water filtering holes, and the inner wall of the distributor is installed with a filter cloth; A connecting plate and a rotating rod are connected to the outside of the distributor, and rotating seats are connected to both ends of the rotating rod. The rotating seat is installed on the conveyor steel belt. A torsion spring is installed between the rotating seat and the rotating rod so that the distributor has a force to abut against the conveyor steel belt.

[0017] The beneficial effect of adopting the above further scheme is that the water squeezed out from the sludge flows out after passing through the filter cloth and the water filter holes, which is conducive to subsequent unified collection; The torsion spring enables the distributor to have a force to abut against the conveyor steel belt, so that the lower surface of the distributor abuts against the conveyor steel belt to prevent sludge from flowing out from the gap between the conveyor steel belt and the lower surface of the distributor.

[0018] Further, the guide assembly includes a guide rod, a first guide rail and a second guide rail, the middle portion of the guide rod is connected to the distributor, guide bearings are installed at both ends of the guide rod, the two guide bearings are respectively located in the first guide rail and the second guide rail, and magnetic induction components are installed at the ends of the guide bearings; The first guide rail and the second guide rail each include a horizontal guide rod having a guide groove.

[0019] The beneficial effect of adopting the above further scheme is that the guide assembly facilitates the lower surface of the distributor to be in close contact with the conveyor belt, and is also used to subsequently separate the conveyor belt from the distributor to discharge the squeezed sludge out of the distributor.

[0020] Further, the paving assembly comprises a paving plate, a single-acting spring return cylinder and a tuning fork, the paving plate is horizontally connected to the frame, the single-acting spring return cylinder is installed on the lower side of the paving plate, and the tuning fork is connected to the output end of the single-acting spring return cylinder; The frame is provided with a magnetic inductor matched with the magnetic induction element, and the magnetic inductor is also electrically connected to a buzzer, and the sound generated by the buzzer drives the tuning fork to resonate and vibrate and flatten the secondary sludge in the distributor; A mud conveying pipe is also installed on the paving plate.

[0021] The beneficial effect of adopting the above further scheme is that the sludge is initially treated by the screw filter press and then transported to the distributor through the sludge pipe. During the sludge transportation process, the sound emitted by the buzzer drives the tuning fork to vibrate. At the same time, the single-acting spring pressure return cylinder drives the tuning fork to gradually move upward, so that the vibration generated by the tuning fork vibrates and flattens the sludge in the distributor.

[0022] Further, the single-acting spring return cylinder comprises a cylinder body, a piston and a telescopic rod, wherein the piston is installed in the cylinder body, and the piston is connected to the telescopic rod, and the other end of the telescopic rod is connected to the tuning fork, and a return spring is disposed on the outer sleeve of the telescopic rod, and the two ends of the return spring are respectively in contact with the piston and the inner wall of the cylinder body; An intake valve, a discharge valve and a magnetic induction valve are connected to the cylinder body. The intake valve and the discharge valve are located at the bottom of the cylinder body and the intake valve is connected to a compressed air pipe. The magnetic induction valve is close to the bottom of the cylinder body. The piston has a magnetic induction component for opening and closing the magnetic induction valve. An output end of the magnetic induction valve is connected to an air blowing pipe, and the end of the air blowing pipe faces the tuning fork.

[0023] The beneficial effect of adopting the above further scheme is: the compressed air pipe quickly introduces compressed air into the cylinder body so that the piston drives the tuning fork to move downward to the lowest point, the discharge valve gradually releases the compressed air in the cylinder body so that the piston gradually moves upward under the action of the return spring, and when the piston contacts the magnetic induction valve, the magnetic induction valve opens so that the remaining compressed air in the cylinder body is discharged from the blowing pipe and flushes the tuning fork, blowing off the sludge on the surface of the tuning fork.

[0024] Furthermore, the filter press assembly includes a filter press plate and a filter press cylinder, the filter press cylinder is connected to a hydraulic pump station, a plurality of the filter press cylinders are installed on the frame, and the filter press plate is installed at the output end of the filter press cylinder, the filter press plate has a drainage hole, and a filter cloth is installed on the surface of the filter press plate.

[0025] The beneficial effect of adopting the above further scheme is that drainage holes and filter cloth are arranged on the surface of the filter press plate, which can quickly discharge the water generated during the extrusion process and prevent sludge from clogging the drainage holes, thereby improving the dehydration efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a flow chart of the process steps of the full chain deep treatment of municipal sludge in a specific embodiment of the present invention; Figure 2 This is a schematic structural diagram of a high-pressure filter press according to a specific embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of a conveying roller assembly and a guide assembly according to a specific embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of a paving assembly and a filter press assembly according to a specific embodiment of the present invention; Figure 5 The figure is a schematic diagram of the structure of a single-acting spring return cylinder according to a specific embodiment of the present invention.

[0027] In the accompanying drawings, the components represented by the reference numerals are listed as follows: 1. Conveying roller assembly; 2. Distributor; 3. Paving assembly; 4. Filter pressing assembly; 5. Conveying steel belt; 6. Guide assembly; 7. Frame; 8. First conveying roller; 9. Second conveying roller; 10. Support beam; 11. Worm gear; 12. Power motor; 13. Support block; 14. Leakage hole; 15. Connecting plate; 16. Rotating rod; 17. Rotating seat; 18. Guide rod; 19. Guide bearing; 20. Horizontal guide rod; 21. Guide groove; 22. Paving plate; 23. Single-acting spring return cylinder; 24. Tuning fork; 25. Buzzer; 26. Mud conveying pipe; 27. Cylinder body; 28. Piston; 29. ​​Telescopic rod; 30. Return spring; 31. Inlet valve; 32. Discharge valve; 33. Magnetic induction valve; 34. Filter pressing plate; 35. Filter pressing cylinder. DETAILED DESCRIPTION

[0028] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0029] In the description of the present invention, it is necessary to understand that the terms "center", "length", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "inside", "outside", "peripheral", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred system or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0030] In the description of the present invention, “plurality” means at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] like Figure 1 As shown, a full-chain deep treatment process for municipal sludge includes the following steps: S100. The sludge having a water content of 98% to 99% is added with a flocculant and mixed and then introduced into a stacked screw filter press to initially dehydrate the sludge to form a preliminary sludge having a water content of 83% to 87%; The added flocculant is polyacrylamide, and the added amount of the flocculant is 0.3‰-1‰ of the dry mass of the sludge.

[0033] S200. The preliminary sludge in step S100 is passed into a conditioning tank, and a sludge conditioner is added to mix and stir to form secondary sludge. The sludge conditioner added to the conditioning tank is a polyaluminum-iron complex salt. The amount of sludge conditioner added is 5%-20% of the dry mass of the sludge. Sludge dry matrix with different pH values ​​can be used to further prepare other products. For example, sludge with a suitable pH value can be used for land use as a soil conditioner; while sludge with a higher pH value can be used for incineration or building material utilization to reduce the impact on the environment.

[0034] S300. The secondary sludge in step S200 is introduced into the distributor in the high-pressure filter press. During the introduction of the secondary sludge, the buzzer drives the tuning fork to vibrate and lay the sludge in the distributor evenly; S400. After the secondary sludge in the distributor reaches the set height, the power motor rotates to drive the conveyor belt to move the distributor to the bottom of the filter press plate; S500. The filter press cylinder extends to drive the filter press plate to move downward to squeeze the sludge for dehydration. After the squeezing and dehydration are completed, the filter press cylinder maintains pressure for 1 to 2 minutes; S600. After the extrusion is completed, the power motor rotates to drive the conveyor belt to move the distributor. When the lower end of the distributor gradually breaks away from the conveyor belt and the distributor still moves horizontally, the extruded sludge is discharged from the lower end of the distributor under the action of gravity; After the sludge is squeezed out, the power motor reverses to move the distributor to the initial position, waiting for the next secondary sludge to be introduced, and the cycle continues.

[0035] like Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, a municipal sludge full-chain deep treatment device is applied to the municipal sludge full-chain deep treatment process as described above, comprising: High-pressure filter press: the input end of the high-pressure filter press is connected to a stacked screw filter press (not shown in the figure), which is used to preliminarily dehydrate the conditioned sludge; the output end of the high-pressure filter press is connected to a dry mud silo (not shown in the figure), which is used to temporarily store the sludge after high-pressure dehydration, so as to facilitate subsequent unified transportation to a designated location.

[0036] The high-pressure filter press includes a conveying roller assembly 1, a distributor 2, a flattening assembly 3 and a filter press assembly 4. The conveying roller assembly 1 is installed on a frame 7 and has a conveying steel belt 5. The distributor 2 is located on the conveying steel belt 5 and one side of the distributor 2 is hinged to the conveying steel belt 5. The conveying roller assembly 1 drives the distributor 2 to move horizontally. The distributor 2 is also connected to a guide assembly 6. The flattening assembly 3 and the filter press assembly 4 are both installed on the frame 7. The flattening assembly 3 is used to flatten the sludge in the distributor 2, and the filter press assembly 4 is used to squeeze and dehydrate the sludge in the distributor 2.

[0037] Municipal sludge is first dehydrated by a screw filter press and then deeply dehydrated by a high-pressure filter press. This combination can effectively improve the dehydration efficiency of the sludge, significantly reduce the moisture content of the sludge, and meet the requirements for deep dehydration of municipal sludge.

[0038] like Figure 2 , Figure 3 As shown, in some embodiments, the conveying roller assembly 1 includes a first conveying roller 8 and a second conveying roller 9, both ends of the first conveying roller 8 and the second conveying roller 9 are installed on a supporting beam 10 by installing bearings, the supporting beam 10 is horizontally connected to the frame 7, and the conveying steel belt 5 is sleeved on the outside of the first conveying roller 8 and the second conveying roller 9.

[0039] A worm gear 11 is installed at the end of the first conveying roller 8 or the second conveying roller 9, and a power motor 12 is installed on the supporting beam 10. A worm matched with the worm gear 11 is installed at the output end of the power motor 12. The rotation of the power motor 12 drives the worm, the worm gear 11, the first conveying roller 8, the second conveying roller 9 and the conveying steel belt 5 to rotate in turn, thereby driving the distributor 2 to reciprocate horizontally.

[0040] In the embodiment, a support block 13 is further provided at the lower side of the conveyor steel belt 5, and the upper end surface of the support block 13 abuts against the lower side of the conveyor steel belt 5. When the filter press assembly 4 squeezes the sludge under high pressure, the support block 13 is used to support the conveyor steel belt 5 to reduce deformation or tearing of the conveyor steel belt 5. The two ends of the support block 13 are horizontally connected to the frame 7. A water leakage hole 14 is also provided on the support block 13, and a sewage collection tank is also installed on the lower side of the support block 13. When the filter press assembly 4 squeezes the sludge under high pressure, a part of the sewage flows out from the gap on the conveyor steel belt 5 and flows into the sewage collection tank after passing through the water leakage hole 14. In order to improve the filtering effect, a layer of filter cloth can be wrapped on the outer surface of the conveyor steel belt 5.

[0041] like Figure 2 , Figure 3 and Figure 4As shown, in the embodiment, the distributor 2 is open at both ends and is in a hollow cylindrical shape. The outer wall of the distributor 2 is provided with water filter holes, which are small in diameter and dense, and a filter cloth is installed on the inner wall of the distributor 2. The outer side of the distributor 2 is connected to a connecting plate 15 and a rotating rod 16, and both ends of the rotating rod 16 are connected to a rotating seat 17, which is installed on the conveyor steel belt 5. A torsion spring is installed between the rotating seat 17 and the rotating rod 16 so that the distributor 2 has a force to abut against the conveyor steel belt 5, so that the distributor 2 has a pre-force to continuously abut against the surface of the conveyor steel belt 5.

[0042] like Figure 2 As shown, in the embodiment, the guide assembly 6 includes a guide rod 18, a first guide rail and a second guide rail. The middle part of the guide rod 18 is connected to the distributor 2. Guide bearings 19 are installed at both ends of the guide rod 18. The two guide bearings 19 are respectively located in the first guide rail and the second guide rail, and magnetic induction parts are installed at the ends of the guide bearings 19. The first guide rail and the second guide rail both include a horizontal guide rod 20, and the horizontal guide rod 20 has a guide groove 21.

[0043] Figure 2 The three distributors 2 in the middle respectively represent the distributors 2 in different working positions. When the guide rod 18 moves to the end of the guide assembly 6, the guide rod 18 and the connecting plate 15 support both ends of the distributor 2, so that the lower end of the distributor 2 is suspended, which is conducive to discharging the sludge squeezed into cakes.

[0044] In other embodiments, the guide groove 21 is arc-shaped near the paving assembly 3. The arc-shaped guide groove 21 and the guide bearing 19 cooperate to make the lower side of the end of the distributor 2 in close contact with the conveyor steel belt 5, reducing the escape of sludge from the gap when squeezed.

[0045] like Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the paving assembly 3 includes a paving plate 22, a single-acting spring-return type cylinder 23 and a tuning fork 24. The paving plate 22 is horizontally connected to the frame 7. A single-acting spring-return type cylinder 23 is installed on the lower side of the paving plate 22. The output end of the single-acting spring-return type cylinder 23 is connected to the tuning fork 24. A magnetic sensor that cooperates with a magnetic induction component is installed on the frame 7. The magnetic sensor is also electrically connected to a buzzer 25. The sound generated by the buzzer 25 drives the tuning fork 24 to resonate and vibrate the secondary sludge in the distributor 2 to pave it flat. A sludge conveying pipe 26 is also installed on the paving plate 22.

[0046] During operation, when the guide bearing 19 moves to the specified position, the magnetic induction element and the magnetic sensor cooperate to transmit signals, and the magnetic sensor transmits the signal to the control device (not shown in the figure). The control device controls the buzzer 25 to emit a high-frequency vibration sound. The high-frequency vibration sound emitted by the buzzer 25 not only reminds the staff that the feeder 2 has reached the specified position and started working, and is prohibited from approaching, but also the high-frequency vibration sound generated by the buzzer 25 drives the tuning fork 24 to vibrate. Since the end of the tuning fork 24 is inserted into the sludge, the sludge vibrates, and then the surface of the sludge is vibrated and flattened.

[0047] Since mud is easily attached around the distributor 2, deviation will occur when infrared sensing is used to determine the position of the distributor 2. If the position of the distributor 2 is controlled by controlling the number of revolutions of the power motor 12, the cost of the power motor 12 will increase. At the same time, since there will be relative sliding between the conveyor steel belt 5 and the conveyor roller assembly 1, the distributor 2 cannot be accurately stopped at a suitable position. Therefore, in this embodiment, the position of the distributor 2 is determined by a magnetic sensing element and a magnetic sensor, which is not only simple in structure but also has a small error.

[0048] The single-acting spring return cylinder 23 has a cylinder body 27, a piston 28 and a telescopic rod 29. The piston 28 is installed in the cylinder body 27, and the piston 28 is connected to the telescopic rod 29. The other end of the telescopic rod 29 is connected to the tuning fork 24. The telescopic rod 29 is provided with a return spring 30. The two ends of the return spring 30 are respectively in contact with the piston 28 and the inner wall of the cylinder body 27. The cylinder body 27 is connected with an intake valve 31, a discharge valve 32 and a magnetic induction valve 33. The intake valve 31 and the discharge valve 32 are located at the bottom of the cylinder body 27 and the intake valve 31 is connected to the compressed air pipe. The magnetic induction valve 33 is close to the bottom of the cylinder body 27. The piston 28 has a magnetic induction component for opening and closing the magnetic induction valve 33. The output end of the magnetic induction valve 33 is connected to a blow pipe, and the end of the blow pipe faces the tuning fork 24.

[0049] During operation, when the control device controls the buzzer 25 to emit a high-frequency vibration sound, the sludge enters the distributor 2 through the mud delivery pipe 26. After a period of time, the control device controls the electromagnetic valve on the compressed air pipe to open and introduce compressed air into the cylinder body 27, so that the piston 28 and the tuning fork 24 quickly reach the bottom dead center, and then the electromagnetic valve is closed. Since the discharge valve 32 gradually releases the compressed air in the cylinder body 27, the piston 28 and the tuning fork 24 gradually move upward under the action of the return spring 30. During the upward movement of the tuning fork 24, it is affected by the sound emitted by the buzzer 25 to produce resonance, thereby vibrating and flattening the sludge just introduced into the distributor 2.

[0050] When the piston 28 makes inductive contact with the magnetic induction valve 33, the magnetic induction component on the magnetic induction valve 33 opens to discharge the remaining compressed air in the cylinder body 27 from the magnetic induction valve 33 and flush the tuning fork 24 after passing through the air pipe, thereby preventing the tuning fork 24 from being attached with too much sludge and causing the amplitude to change. In addition, the compressed air remaining in the cylinder body 27 reduces the impact of the sludge on the tuning fork 24, thereby preventing the sludge from splashing due to excessive flushing force.

[0051] The filter press assembly 4 includes a filter press plate 34 and a filter press cylinder 35. The filter press cylinder 35 is connected to a hydraulic pump station (not shown in the figure). Multiple filter press cylinders 35 are installed on the frame 7, and a filter press plate 34 is installed at the output end of the filter press cylinder 35. The filter press plate 34 has a drainage hole, and a filter cloth is installed on the surface of the filter press plate 34. The filter press plate 34 moves downward to squeeze the sludge, and the sewage on the upper side of the distributor 2 is discharged from the drainage holes on the filter press plate 34, and then discharged from the water filter holes on the side wall of the distributor 2.

[0052] Embodiment 1 The water content of a municipal sewage is 98% to 99%. The sludge is passed into the coagulation tank, and the reagent is added to the coagulation tank for mixing. The mixed sludge is transported to the stacked screw filter press for preliminary dehydration, reducing the water content to 83% to 87%. Finally, the sludge with a water content of 83% to 87% is passed into the high-pressure filter press for further extrusion. The extrusion time, pressure and water content are shown in the following table: serial number PressureMpa Pressure time min Holding time min Moisture content% 1 15 50 2 63.79 2 16 50 2 55.92 3 17 50 2 53.53 4 18 50 2 52.84 5 19 50 2 52.31 Table 1 Water content of sludge after squeezing under different hydraulic pressures As shown in Table 1, after deep dehydration by the high-pressure filter press, the water content in the sludge can be reduced to 52.31% or below.

[0053] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A full-chain deep treatment process for municipal sludge, characterized in that: The following steps are involved: S100. The sludge having a water content of 98% to 99% is added with a flocculant and mixed and then introduced into a stacked screw filter press to initially dehydrate the sludge to form a preliminary sludge having a water content of 83% to 87%; S200. The preliminary sludge in step S100 is introduced into a conditioning tank, and a sludge conditioning agent is added and mixed to form secondary sludge; S300. The secondary sludge in step S200 is introduced into the distributor in the high-pressure filter press. During the introduction of the secondary sludge, the buzzer drives the tuning fork to vibrate and lay the sludge in the distributor evenly; S400. After the secondary sludge in the distributor reaches the set height, the power motor rotates to drive the conveyor belt to move the distributor to the bottom of the filter press plate; S500. The filter press cylinder extends to drive the filter press plate to move downward to squeeze the sludge for dehydration. After the squeezing and dehydration are completed, the filter press cylinder maintains pressure for 1 to 2 minutes; S600. After the extrusion is completed, the power motor rotates to drive the conveyor belt to move the distributor. When the lower end of the distributor gradually breaks away from the conveyor belt and the distributor still moves horizontally, the extruded sludge is discharged from the lower end of the distributor under the action of gravity; After the sludge is squeezed out, the power motor reverses to move the distributor to the initial position, waiting for the next secondary sludge to be introduced, and the cycle continues.

2. The municipal sludge full-chain deep treatment process according to claim 1, characterized in that: In step S100, the flocculant added is polyacrylamide; in step S200, the sludge conditioning agent added to the conditioning tank is polyaluminum-iron double salt; The amount of flocculant added is 0.3‰-1‰ of the dry sludge mass, and the amount of sludge conditioner added is 5%-20% of the dry sludge mass.

3. A municipal sludge full-chain deep treatment device, applied to the municipal sludge full-chain deep treatment process as claimed in any one of claims 1 to 2, characterized in that: It comprises a high-pressure filter press, wherein the input end of the high-pressure filter press is connected to a stacked screw filter press, and the output end of the high-pressure filter press is connected to a dry mud silo; The high-pressure filter press comprises a conveying roller assembly, a distributor, a flattening assembly and a filter press assembly, wherein the conveying roller assembly is mounted on a frame and has a conveying steel belt, the distributor is located on the conveying steel belt and one side of the distributor is hinged to the conveying steel belt, and the conveying roller assembly drives the distributor to move horizontally; The distributor is also connected to a guide assembly; The flattening assembly and the filter press assembly are both installed on the frame, the flattening assembly is used to flatten the sludge in the distributor, and the filter press assembly is used to squeeze and dehydrate the sludge in the distributor.

4. The municipal sludge full-chain deep treatment device according to claim 3 is characterized by: The conveying roller assembly comprises a first conveying roller and a second conveying roller, both ends of the first conveying roller and the second conveying roller are mounted on a supporting crossbeam through mounting bearings, the supporting crossbeam is horizontally connected to the frame, and the conveying steel belt is sleeved on the outside of the first conveying roller and the second conveying roller; A worm gear is installed at the end of the first conveying roller or the second conveying roller, a power motor is installed on the supporting crossbeam, and a worm matched with the worm gear is installed at the output end of the power motor.

5. The municipal sludge full-chain deep treatment device according to claim 3 is characterized by: A support block is also provided at the lower side of the conveyor steel belt, the upper end surface of the support block abuts against the lower side of the conveyor steel belt, both ends of the support block are horizontally connected to the frame, and a water leakage hole is also provided on the support block.

6. The municipal sludge full-chain deep treatment device according to claim 3 is characterized by: The distributor is open at both ends and is in a hollow cylindrical shape. The outer wall of the distributor is provided with water filtering holes, and the inner wall of the distributor is installed with a filter cloth. A connecting plate and a rotating rod are connected to the outside of the distributor, and rotating seats are connected to both ends of the rotating rod. The rotating seat is installed on the conveyor steel belt. A torsion spring is installed between the rotating seat and the rotating rod so that the distributor has a force to abut against the conveyor steel belt.

7. The municipal sludge full-chain deep treatment device according to claim 3 is characterized by: The guide assembly comprises a guide rod, a first guide track and a second guide track, the middle portion of the guide rod is connected to the distributor, guide bearings are installed at both ends of the guide rod, the two guide bearings are respectively located in the first guide track and the second guide track, and magnetic induction components are installed at the ends of the guide bearings; The first guide rail and the second guide rail each include a horizontal guide rod having a guide groove.

8. The municipal sludge full-chain deep treatment device according to claim 7 is characterized by: The paving assembly comprises a paving plate, a single-acting spring return cylinder and a tuning fork. The paving plate is horizontally connected to the frame. The single-acting spring return cylinder is installed on the lower side of the paving plate. The tuning fork is connected to the output end of the single-acting spring return cylinder. The frame is provided with a magnetic inductor matched with the magnetic induction element, and the magnetic inductor is also electrically connected to a buzzer, and the sound generated by the buzzer drives the tuning fork to resonate and vibrate and flatten the secondary sludge in the distributor; A mud conveying pipe is also installed on the paving plate.

9. The municipal sludge full-chain deep treatment device according to claim 8, characterized in that: The single-acting spring return cylinder comprises a cylinder body, a piston and a telescopic rod, wherein the piston is installed in the cylinder body and connected to the telescopic rod, the other end of the telescopic rod is connected to the tuning fork, and a return spring is disposed on the outer sleeve of the telescopic rod, and the two ends of the return spring are respectively in contact with the piston and the inner wall of the cylinder body; An intake valve, a discharge valve and a magnetic induction valve are connected to the cylinder body. The intake valve and the discharge valve are located at the bottom of the cylinder body and the intake valve is connected to a compressed air pipe. The magnetic induction valve is close to the bottom of the cylinder body. The piston has a magnetic induction component for opening and closing the magnetic induction valve. An output end of the magnetic induction valve is connected to an air blowing pipe, and the end of the air blowing pipe faces the tuning fork.

10. The municipal sludge full-chain deep treatment device according to claim 3, characterized in that: The filter press assembly includes a filter press plate and a filter press cylinder, the filter press cylinder is connected to a hydraulic pump station, a plurality of the filter press cylinders are installed on the frame, and the filter press plate is installed at the output end of the filter press cylinder, the filter press plate has a drainage hole, and a filter cloth is installed on the surface of the filter press plate.

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