A municipal sludge full-chain deep treatment device and process

Abstract

The present 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. The process includes the following steps: S100. Add a flocculant to sludge with a water content of 98% to 99%, stir and mix it, and then feed it into a spiral press filter to preliminarily dehydrate the sludge to form preliminary sludge with a water content of 83% to 87%; S200. Feed the preliminary sludge in step S100 into a conditioning tank, and add a sludge conditioner and mix and stir to form secondary sludge; S300. Feed the secondary sludge in step S200 into a distributor in a high-pressure filter press. During the feeding process of the secondary sludge, a buzzer drives a tuning fork to vibrate to level the sludge in the distributor; S400. After the secondary sludge in the distributor reaches a set height, a power motor rotates to drive a conveyor steel belt to move and move the distributor to directly below the filter plate; S500. The filter press oil cylinder extends to drive the filter plate to move downward to squeeze the sludge for dehydration. After the squeezing dehydration is completed, the filter press oil cylinder maintains pressure for 1 minute to 2 minutes.

Description

Technical Field

[0001] The present 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 the volume, stabilizing, rendering harmless, and recycling the sludge generated during the sewage treatment process.

[0003] The deep dehydration treatment of municipal sludge is a technology that removes water in the sludge through physical, chemical, or biological methods to reduce the moisture content of the sludge. The moisture content of municipal sludge is usually relatively high, generally above 80%, and even close to 90%. Sludge with a high moisture content has a large volume, poor stability, is difficult to directly dispose of or utilize, and is prone to secondary pollution. Currently, the commonly used sludge dehydration equipment mainly includes belt filter presses, plate and frame filter presses, spiral sludge dehydrators, centrifugal dehydrators, vacuum filtration dehydrators, etc. However, the dehydration rate is fast by using the above methods, but the dehydration effect is relatively weak. For example, a prior application with the publication number CN113443808A discloses a sludge dehydration device that realizes deep dehydration by the action of a hydraulic device on the sludge. However, the flexibility of using the above device is insufficient, resulting in low dehydration efficiency.

[0004] Therefore, those skilled in the art are committed to developing a municipal sludge full-chain deep treatment device and process, which is conducive to quickly deep dehydrating municipal sludge and improving 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 quickly deep dehydrating municipal sludge and improving the dehydration efficiency of municipal sludge.

[0006] The technical solution of the present invention to solve the above technical problem is as follows:

[0007] A municipal sludge full-chain deep treatment process includes the following steps:

[0008] S100. Add a flocculant to the sludge with a water content of 98% to 99%, stir and mix it, and then introduce it into a spiral filter press to preliminarily dehydrate the sludge to form preliminary sludge with a water content of 83% to 87%;

[0009] S200. Introduce the preliminary sludge in step S100 into a conditioning tank, and add a sludge conditioner and mix and stir to form secondary sludge;

[0010] S300. Introduce the secondary sludge in step S200 into the distributor of a high-pressure filter press. During the introduction of the secondary sludge, the buzzer drives the tuning fork to vibrate to level the sludge in the distributor;

[0011] S400. After the secondary sludge in the distributor reaches the set height, the power motor rotates to drive the conveyor steel belt to move, and the distributor is moved directly below the filter plate.

[0012] S500. The filter pressing oil cylinder extends to drive the filter plate to move downward to squeeze the sludge for dehydration. After the squeezing and dehydration are completed, the filter pressing oil cylinder maintains pressure for 1 to 2 minutes.

[0013] S600. After the extrusion ends, the power motor rotates to drive the conveyor steel belt to move and the distributor is moved. When the lower end of the distributor gradually disengages from the conveyor steel belt and the distributor still moves horizontally, the extruded sludge is discharged from the lower end of the distributor under the action of gravity.

[0014] After the extruded sludge is discharged, the power motor rotates in reverse to move the distributor to the initial position, waiting for the next secondary sludge to be introduced, and so on in a cycle.

[0015] The beneficial effects of adopting the above solution are: Through multi-stage treatment steps such as conditioning, spiral press filtration, paving, and filter pressing, the full-chain deep dehydration of municipal sludge is realized, the moisture content of the sludge can be significantly reduced, meeting the requirements of deep dehydration;

[0016] The pressure maintaining step can fully discharge the water in the sludge, avoid the water backflow caused by too fast pressure release, and ensure that the moisture content of the dehydrated sludge is low and uniform.

[0017] On the basis of the above technical solution, the present invention can also be improved as follows.

[0018] Further, in step S100, the flocculant added is polyacrylamide; in step S200, the sludge conditioner added to the conditioning tank is polymeric aluminum-iron double salt;

[0019] The addition amount of the flocculant is 0.3‰ - 1‰ of the dry basis mass of the sludge, and the addition amount of the sludge conditioner is 5% - 20% of the dry basis mass of the sludge.

[0020] The beneficial effects of adopting the above further solution are: By adjusting the pH value, the sludge can be converted into valuable resources, improving the resource utilization rate of the sludge, reducing the environmental pollution of the sludge, improving the environmental friendliness of sludge treatment, reducing the usage amount of the pre-dehydration flocculant at the front end, saving the chemical cost, reducing the pre-dehydration requirements at the front end, and improving the operation efficiency.

[0021] A full-chain deep treatment device for municipal sludge, which is applied to the full-chain deep treatment process of municipal sludge as described above, includes a high-pressure filter press. The input end of the high-pressure filter press is connected with a spiral press filter, and the output end of the high-pressure filter press is connected with a dry sludge bin.

[0022] The high-pressure filter press includes a conveying roller assembly, a distributor, a leveling assembly, and a filtering assembly. The conveying roller assembly is installed 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. The conveying roller assembly drives the distributor to move horizontally.

[0023] The distributor is also connected with a guiding assembly.

[0024] The leveling assembly and the filtering assembly are both installed on the frame. The leveling assembly is used to level the sludge in the distributor, and the filtering assembly is used to extrude and dehydrate the sludge in the distributor.

[0025] The beneficial effect of adopting the above further scheme is that: after the municipal sludge is preliminarily dehydrated by a spiral press filter, the high-pressure filter press is then used for deep dehydration. This combined method can effectively improve the dehydration efficiency of the sludge, significantly reduce the moisture content of the sludge, and meet the requirements of deep dehydration of municipal sludge.

[0026] The hinged design of the distributor and the conveying steel belt and the connection of the guiding assembly make the distributor more stable during movement. At the same time, the cooperation between the guiding assembly and the conveying roller assembly makes the distributor suspended, which is beneficial to quickly discharging the sludge cake after dehydration and extrusion.

[0027] Adjust the extrusion force of the filtering assembly according to different sludges to achieve deep dehydration of different sludges and realize multi-purpose use of one machine.

[0028] 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 a supporting cross beam through mounting bearings. The supporting cross beam is horizontally connected to the frame. The conveying steel belt is sleeved outside the first conveying roller and the second conveying roller.

[0029] 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 cross beam, and a worm that cooperates with the worm gear is installed at the output end of the power motor.

[0030] The beneficial effect of adopting the above further scheme is that: the power motor realizes stable power output through worm gear transmission, ensuring the smooth operation of the conveying steel belt. The worm gear transmission has a self-locking function, which can effectively prevent slipping or reverse rotation during the conveying process and improve the reliability of the equipment operation.

[0031] Moreover, the worm gear and worm assembly is installed on the supporting cross beam, avoiding interference with the movement of other components caused by the power motor and the chain.

[0032] Further, support blocks are also provided on 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 water leakage holes are also provided on the support block.

[0033] The beneficial effects of adopting the above further solution are as follows: The support blocks are used to bear the pressure exerted on the conveyor steel belt by the filter press assembly, prevent it from sagging or deforming during operation, ensure the smoothness of the conveying process, so that the water in the sludge is quickly squeezed out, flows out through the gaps in the steel belt, and is discharged into the sewage collection bin through the water leakage holes.

[0034] Further, both ends of the distributor are open and are hollow cylindrical. Filter water holes are provided on the outer wall of the distributor, and a filter screen is installed on the inner wall of the distributor;

[0035] A connecting plate and a rotating rod are connected to the outside of the distributor. Both ends of the rotating rod are connected with rotating seats. The rotating seats are installed on the conveyor steel belt, and 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.

[0036] The beneficial effects of adopting the above further solution are as follows: The water squeezed out from the sludge flows out after passing through the filter screen and the filter water holes, which is conducive to subsequent unified collection;

[0037] The torsion spring makes the distributor 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.

[0038] Further, the guiding assembly includes a guiding rod, a first guiding track and a second guiding track. The middle of the guiding rod is connected to the distributor. Guiding bearings are installed at both ends of the guiding rod. The two guiding bearings are respectively located in the first guiding track and the second guiding track, and a magnetic induction part is installed at the end of the guiding bearing;

[0039] Both the first guiding track and the second guiding track include horizontal guiding rods, and the horizontal guiding rods have guiding grooves.

[0040] The beneficial effects of adopting the above further solution are as follows: The guiding assembly is conducive to the lower surface of the distributor being close to the conveyor steel belt, and is also used to separate the conveyor steel belt from the distributor subsequently to discharge the squeezed sludge out of the distributor.

[0041] Further, the leveling assembly includes a leveling plate, a single-acting spring-return cylinder and a tuning fork. The leveling plate is horizontally connected to the frame. The single-acting spring-return cylinder is installed on the lower side of the leveling plate, and the output end of the single-acting spring-return cylinder is connected with the tuning fork;

[0042] A magnetic inductor cooperating with the magnetic induction element is installed on the frame. The magnetic inductor is also electrically connected to a buzzer. The sound generated by the buzzer drives the tuning fork to resonate, vibrating and leveling the secondary sludge in the distributor.

[0043] A sludge delivery pipe is also installed on the paving plate.

[0044] The beneficial effect of adopting the above further scheme is as follows: After the sludge is preliminarily treated by the spiral press filter, it is transported to the distributor through the sludge delivery 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-return type cylinder drives the tuning fork to gradually move upward, so that the vibration generated by the tuning fork vibrates and levels the sludge in the distributor.

[0045] Further, the single-acting spring-return type cylinder has a cylinder body, a piston and a telescopic rod. The piston is installed in the cylinder body, and the piston is connected to the telescopic rod. The other end of the telescopic rod is connected to the tuning fork. A return spring is sleeved outside the telescopic rod, and both ends of the return spring are abutted against the piston and the inner wall of the cylinder body respectively.

[0046] An air inlet valve, a relief valve and a magnetic induction valve are connected to the cylinder body. The air inlet valve and the relief valve are located at the bottom of the cylinder body, and the air inlet valve is connected to the 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. The output end of the magnetic induction valve is connected to a blow pipe, and the end of the blow pipe faces the tuning fork.

[0047] The beneficial effect of adopting the above further scheme is as follows: Compressed air is quickly introduced into the cylinder body through the compressed air pipe, so that the piston drives the tuning fork to move downward to the lowest position. The relief valve gradually releases the compressed air in the cylinder body, so that the piston gradually moves upward under the action of the return spring. When the piston is in inductive contact with the magnetic induction valve, the magnetic induction valve opens, so that the remaining compressed air in the cylinder body is discharged from the blow pipe and flushes the tuning fork, blowing off the sludge on the surface of the tuning fork.

[0048] Further, the filter pressing assembly includes filter pressing plates and filter pressing oil cylinders. The filter pressing oil cylinders are connected to a hydraulic pump station. A plurality of the filter pressing oil cylinders are installed on the frame, and the output ends of the filter pressing oil cylinders are installed with the filter pressing plates. The filter pressing plates have drain holes, and filter mesh cloths are installed on the surfaces of the filter pressing plates.

[0049] The beneficial effect of adopting the above further scheme is as follows: Drain holes and filter mesh cloths are arranged on the surface of the filter pressing plate, which can quickly discharge the water generated during the pressing process, and at the same time prevent the sludge from blocking the drain holes, improving the dehydration efficiency. Description of the Drawings

[0050] Figure 1Process flow chart of the full-chain deep treatment of municipal sludge in a specific embodiment of the present invention;

[0051] Figure 2 Schematic structural diagram of a high-pressure filter press in a specific embodiment of the present invention;

[0052] Figure 3 Schematic structural diagram of a conveying roller assembly and a guiding assembly in a specific embodiment of the present invention;

[0053] Figure 4 Schematic structural diagram of a leveling assembly and a filter pressing assembly in a specific embodiment of the present invention;

[0054] Figure 5 Schematic structural diagram of a single-acting spring-return type cylinder in a specific embodiment of the present invention.

[0055] In the drawings, the list of components represented by each reference numeral is as follows:

[0056] 1. Conveying roller assembly; 2. Distributor; 3. Leveling assembly; 4. Filter pressing assembly; 5. Conveying steel belt; 6. Guiding assembly; 7. Frame; 8. First conveying roller; 9. Second conveying roller; 10. Support crossbeam; 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 type cylinder; 24. Tuning fork; 25. Buzzer; 26. Mud conveying pipe; 27. Cylinder body; 28. Piston; 29. Expansion rod; 30. Return spring; 31. Intake valve; 32. Discharge valve; 33. Magnetic induction valve; 34. Filter pressing plate; 35. Filter pressing oil cylinder. Detailed implementation manners

[0057] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0058] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "inner", "outer", "peripheral side", "circumferential direction", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the system or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0059] In the description of the present invention, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0060] In the present invention, unless otherwise clearly defined and limited, terms such as "installation", "connection", "attachment", "fixation", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral one; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] As Figure 1 shown, a full-chain deep treatment process for municipal sludge includes the following steps:

[0062] S100. Add a flocculant to the sludge with a water content of 98% to 99%, stir and mix it, and then feed it into a spiral press filter to preliminarily dewater the sludge to form preliminary sludge with a water content of 83% to 87%.

[0063] Among them, the added flocculant is polyacrylamide, and the addition amount of the flocculant is 0.3‰ - 1‰ of the dry basis mass of the sludge.

[0064] S200. Feed the preliminary sludge in step S100 into a conditioning tank, add a sludge conditioner and mix and stir to form secondary sludge. The sludge conditioner added to the conditioning tank is a polyaluminum ferric double salt. The addition amount of the sludge conditioner is 5% - 20% of the dry basis mass of the sludge. Sludge dry matrices with different pH values can be further used to 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 materials utilization to reduce the impact on the environment.

[0065] S300. Feed the secondary sludge in step S200 into the distributor of a high-pressure filter press. During the feeding process of the secondary sludge, the buzzer drives the tuning fork to vibrate to level the sludge in the distributor.

[0066] S400. After the secondary sludge in the distributor reaches the set height, the power motor rotates to drive the conveyor steel belt to move and move the distributor directly below the filter plate.

[0067] S500. The filter press oil cylinder extends to drive the filter plate to move downward to squeeze the sludge for dewatering. After the squeezing and dewatering is completed, the filter press oil cylinder maintains pressure for 1 min to 2 min.

[0068] S600. After the squeezing is completed, the power motor rotates to drive the conveyor steel belt to move and move the distributor. When the lower end of the distributor gradually disengages from the conveyor steel belt and the distributor still moves horizontally, the squeezed sludge is discharged from the lower end of the distributor under the action of gravity.

[0069] After the extrusion sludge is discharged, the power motor rotates in reverse to move the spreader to the initial position, waiting for the next secondary sludge to be introduced, and so on in a cycle.

[0070] Such as Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown in, a full-chain deep treatment device for municipal sludge is applied to the full-chain deep treatment process of municipal sludge as described above, and includes

[0071] A high-pressure filter press, the input end of the high-pressure filter press is connected to a spiral filter press (not shown in the figure), the spiral filter press is used for preliminary dehydration of the conditioned sludge, the output end of the high-pressure filter press is connected to a dry sludge bin (not shown in the figure), and the dry sludge bin is used for temporarily storing the sludge after high-pressure dehydration, which is conducive to subsequent unified transportation to a designated location.

[0072] The high-pressure filter press includes a conveying roller assembly 1, a spreader 2, a leveling assembly 3 and a filter pressing assembly 4. The conveying roller assembly 1 is installed on the frame 7 and has a conveying steel belt 5. The spreader 2 is located on the conveying steel belt 5 and one side of the spreader 2 is hinged to the conveying steel belt 5. The conveying roller assembly 1 drives the spreader 2 to move horizontally. The spreader 2 is also connected to a guiding assembly 6. The leveling assembly 3 and the filter pressing assembly 4 are both installed on the frame 7. The leveling assembly 3 is used for leveling the sludge in the spreader 2, and the filter pressing assembly 4 is used for squeezing and dehydrating the sludge in the spreader 2.

[0073] The municipal sludge is first preliminarily dehydrated by a spiral filter press and then deeply dehydrated by a high-pressure filter press. This combination method can effectively improve the dehydration efficiency of the sludge, significantly reduce the moisture content of the sludge, and meet the requirements of deep dehydration of municipal sludge.

[0074] Such as Figure 2 、 Figure 3 As shown in, 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 the support cross beam 10 through mounting bearings. The support cross beam 10 is horizontally connected to the frame 7. The conveying steel belt 5 is sleeved outside the first conveying roller 8 and the second conveying roller 9.

[0075] A worm gear 11 is installed at the end of the first conveying roller 8 or the second conveying roller 9. A power motor 12 is installed on the support cross beam 10. A worm gear meshing 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 gear, the worm gear 11, the first conveying roller 8, the second conveying roller 9 and the conveying steel belt 5 to rotate in sequence, thereby driving the spreader 2 to move horizontally back and forth.

[0076] In the embodiment, a support block 13 is further arranged on the lower side of the conveying steel belt 5. The upper end surface of the support block 13 abuts against the lower side of the conveying steel belt 5. When the pressure filtration assembly 4 squeezes and filters sludge under high pressure, the support block 13 is used to support the conveying steel belt 5, reducing the deformation or tearing of the conveying steel belt 5.

[0077] Both ends of the support block 13 are horizontally connected to the rack 7. A water leakage hole 14 is further arranged on the support block 13, and a sewage collection tank is installed on the lower side of the support block 13. When the pressure filtration assembly 4 squeezes sludge under high pressure, a part of the sewage flows out from the gaps on the conveying steel belt 5 and flows into the sewage collection tank after passing through the water leakage hole 14. In order to improve the filtration effect, a filter mesh cloth can be wrapped on the outer surface of the conveying steel belt 5.

[0078] As Figure 2 、 Figure 3 and Figure 4 shown, in the embodiment, both ends of the distributor 2 are open and in a hollow cylindrical shape. Filter water holes are arranged on the outer wall of the distributor 2. The diameters of the filter water holes are small and dense. A filter mesh cloth is installed on the inner wall of the distributor 2. Connecting plates 15 and rotating rods 16 are connected to the outside of the distributor 2. Both ends of the rotating rod 16 are connected with rotating seats 17. The rotating seats 17 are installed on the conveying 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 conveying steel belt 5, and the distributor 2 has a pre-force to continuously abut against the surface of the conveying steel belt 5.

[0079] As Figure 2 shown, in the embodiment, the guiding assembly 6 includes a guiding rod 18, a first guiding track and a second guiding track. The middle part of the guiding rod 18 is connected to the distributor 2. Guiding bearings 19 are installed at both ends of the guiding rod 18. The two guiding bearings 19 are respectively located in the first guiding track and the second guiding track, and magnetic induction parts are installed at the ends of the guiding bearings 19. Both the first guiding track and the second guiding track include horizontal guiding rods 20, and the horizontal guiding rods 20 are provided with guiding grooves 21.

[0080] Figure 2 The three distributors 2 in

[0081] respectively represent the distributors 2 in different working positions. When the guiding rod 18 moves to the end of the guiding assembly 6, the guiding rod 18 and the connecting plate 15 support both ends of the distributor 2, making the lower end of the distributor 2 suspended, which is beneficial to discharging the squeezed sludge cake.

[0082] As Figure 2 、 Figure 3 、 Figure 4 and Figure 5As shown in the figure, the paving component 3 includes a paving plate 22, a single-acting spring-return cylinder 23, and a tuning fork 24. The paving plate 22 is horizontally connected to the frame 7. A single-acting spring-return cylinder 23 is installed on the lower side of the paving plate 22. The output end of the single-acting spring-return cylinder 23 is connected to a tuning fork 24. A magnetic inductor cooperating with a magnetic induction member is installed on the frame 7. The magnetic inductor is also electrically connected to a buzzer 25. The sound generated by the buzzer 25 drives the tuning fork 24 to resonate, vibrating and paving the secondary sludge in the cloth distributor 2 flat. A sludge delivery pipe 26 is also installed on the paving plate 22.

[0083] During the working process, when the guide bearing 19 moves to the specified position and after the magnetic induction member and the magnetic inductor cooperate to transfer a signal, the magnetic inductor transfers the signal to a 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 cloth distributor 2 has reached the specified position and starts working, and prohibits 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 thus the surface of the sludge is vibrated and paved flat.

[0084] Since the cloth distributor 2 is prone to sticking sludge around it, there will be a deviation when using infrared to sense the position of the cloth distributor 2. If the position of the cloth distributor 2 is controlled by controlling the number of rotation turns of the power motor 12, the cost of the power motor 12 will increase. At the same time, due to the relative sliding between the conveyor steel belt 5 and the conveyor roller assembly 1, it is impossible to accurately stop the cloth distributor 2 at the appropriate position. Therefore, in this embodiment, the position of the cloth distributor 2 is determined by the magnetic induction member and the magnetic inductor, which not only has a simple structure but also has a small error.

[0085] 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 a telescopic rod 29. The other end of the telescopic rod 29 is connected to a tuning fork 24. A return spring 30 is sleeved outside the telescopic rod 29. Both ends of the return spring 30 are in contact with the piston 28 and the inner wall of the cylinder body 27 respectively. An air inlet valve 31, a relief valve 32, and a magnetic induction valve 33 are connected to the cylinder body 27. The air inlet valve 31 and the relief valve 32 are located at the bottom of the cylinder body 27 and the air inlet valve 31 is connected to a 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 blowing pipe, and the end of the blowing pipe faces the tuning fork 24.

[0086] During operation, when the control device controls the high-frequency vibration sound emitted by the buzzer 25, the sludge enters the distributor 2 through the sludge delivery pipe 26. After a period of time, the control device controls the solenoid valve on the compressed air pipe to open and introduce compressed air into the cylinder body 27, causing the piston 28 and the tuning fork 24 to quickly reach the bottom dead center, and then the solenoid valve closes. Since the bleed 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 resonates under the influence of the sound emitted by the buzzer 25, thereby vibrating and leveling the sludge that has just been introduced into the distributor 2.

[0087] When the piston 28 comes into 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 wash the tuning fork 24 after passing through the air blowing pipe, preventing the tuning fork 24 from adhering too much sludge and causing a change in amplitude, and reducing the impact of the remaining compressed air in the cylinder body 27 on the sludge on the tuning fork 24 to avoid excessive flushing force causing sludge splashing.

[0088] The filter press assembly 4 includes filter plates 34 and filter press cylinders 35. The filter press cylinders 35 are connected to a hydraulic pump station (not shown in the figure). A plurality of filter press cylinders 35 are installed on the frame 7, and the output ends of the filter press cylinders 35 are equipped with filter plates 34. The filter plates 34 have drainage holes, and a filter mesh cloth is installed on the surface of the filter plates 34. The filter plates 34 move downward to squeeze the sludge, and the sewage above the distributor 2 is discharged from the drainage holes on the filter plates 34 and then discharged from the water filtering holes on the side wall of the distributor 2.

[0089] Example 1

[0090] For a certain municipal sewage with a water content of 98% to 99%, the sludge is introduced into the coagulation tank, and a chemical agent is added to the coagulation tank for mixing and stirring. The mixed sludge is transported to a spiral press filter for preliminary dehydration, reducing it to 83% to 87%. Finally, the sludge with a water content of 83% to 87% is introduced into a high-pressure filter press for further extrusion. The extrusion time, pressure, and water content are shown in the following table:

[0091] Number Pressure Mpa Compression time min Holding pressure time min Water 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

[0092] Table 1 Water content of the sludge after extrusion under different hydraulic pressures

[0093] As can be seen from Table 1, after deep dehydration by the high-pressure filter press, the water content in the sludge can be reduced to 52.31% or less.

[0094] In the description of this specification, the descriptions referring to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc., mean that the specific features, structures, materials, or characteristics described in connection 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 are not necessarily directed 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, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples.

[0095] The foregoing are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A municipal sludge full-chain deep treatment device, characterized in that: including a high-pressure filter press, the output end of the high-pressure filter press is connected to a dry sludge bin; the high-pressure filter press includes a conveying roller assembly, a distributor, a leveling assembly and a filter pressing assembly, the conveying roller assembly is installed 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 further connected with a guiding assembly; the leveling assembly and the filter pressing assembly are both installed on the frame, the leveling assembly is used for leveling the sludge in the distributor, and the filter pressing assembly is used for squeezing and dehydrating the sludge in the distributor; the guiding assembly includes a guiding rod, a first guiding track and a second guiding track, the middle of the guiding rod is connected with the distributor, guiding bearings are installed at both ends of the guiding rod, the two guiding bearings are respectively located in the first guiding track and the second guiding track, and a magnetic induction part is installed at the end of the guiding bearing; both the first guiding track and the second guiding track include a horizontal guiding rod, and the horizontal guiding rod has a guiding groove; the leveling assembly includes a leveling plate, a single-acting spring return type cylinder and a tuning fork, the leveling plate is horizontally connected with the frame, the single-acting spring return type cylinder is installed on the lower side of the leveling plate, and the output end of the single-acting spring return type cylinder is connected with the tuning fork; a magnetic inductor matched with the magnetic induction part is installed on the frame, the magnetic inductor is also electrically connected with a buzzer, and the sound generated by the buzzer drives the tuning fork to resonate to vibrate and level the secondary sludge in the distributor; a sludge conveying pipe is further installed on the leveling plate; 2. The municipal sludge full-chain deep treatment device according to claim 1, wherein: 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 a supporting cross beam through mounting bearings, the supporting cross beam is horizontally connected with the frame, and the conveying steel belt is sleeved outside 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 cross beam, and a worm meshed with the worm gear is installed at the output end of the power motor; 3. The full-chain deep treatment device for municipal sludge according to claim 1, wherein: supporting blocks are further arranged under the conveying steel belt, the upper end surfaces of the supporting blocks are abutted against the lower side of the conveying steel belt, both ends of the supporting blocks are horizontally connected with the frame, and water leakage holes are further arranged on the supporting blocks; 4. The full-chain deep treatment device for municipal sludge according to claim 1, wherein: both ends of the distributor are open and are in a hollow cylindrical shape, water filtering holes are arranged on the outer wall of the distributor, and a filter screen cloth is installed on the inner wall of the distributor; a connecting plate and a rotating rod are connected to the outside of the distributor, rotating seats are connected to both ends of the rotating rod, the rotating seats are installed on the conveying steel belt, and a torsion spring is installed between the rotating seats and the rotating rod so that the distributor has a force for abutting against the conveying steel belt.

5. The municipal sludge full-chain deep treatment device according to claim 4, characterized in that: The single-acting spring-return cylinder has a cylinder body, a piston and a telescopic rod. The piston is installed in the cylinder body, and the piston is connected with the telescopic rod. The other end of the telescopic rod is connected with the tuning fork. A return spring is sleeved outside the telescopic rod, and both ends of the return spring are abutted against the piston and the inner wall of the cylinder body respectively; An air inlet valve, a discharge valve and a magnetic induction valve are connected to the cylinder body. The air inlet valve and the discharge valve are located at the bottom of the cylinder body, and the air inlet 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. The output end of the magnetic induction valve is connected to a blow pipe, and the end of the blow pipe faces the tuning fork.

6. The full-chain deep treatment device for municipal sludge according to claim 1, wherein: The pressure filtration component includes a pressure filtration plate and a pressure filtration oil cylinder. The pressure filtration oil cylinder is connected with a hydraulic pump station. A plurality of the pressure filtration oil cylinders are installed on the rack, and the pressure filtration plate is installed at the output end of the pressure filtration oil cylinder. The pressure filtration plate has drain holes, and a filter mesh cloth is installed on the surface of the pressure filtration plate.

7. A full-chain deep treatment process for municipal sludge, applied to the full-chain deep treatment device for municipal sludge according to any one of claims 1 to 6, characterized in that, It includes the following steps: S100. Add a flocculant to the sludge with a water content of 98% to 99% and stir and mix it, then feed it into a spiral press filter to preliminarily dehydrate the sludge to form preliminary sludge with a water content of 83% to 87%; S200. Feed the preliminary sludge in step S100 into a conditioning tank, and add a sludge conditioner and mix and stir to form secondary sludge; S300. Feed the secondary sludge in step S200 into a distributor in a high-pressure filter press. During the feeding process of the secondary sludge, the buzzer drives the tuning fork to vibrate to level the sludge in the distributor; S400. After the secondary sludge in the distributor reaches the set height, the power motor rotates to drive the conveyor steel belt to move and move the distributor directly below the pressure filtration plate; S500. The pressure filtration oil cylinder extends to drive the pressure filtration plate to move downward to squeeze the sludge for dehydration. After the squeezing dehydration is completed, the pressure filtration oil cylinder maintains pressure for 1 min to 2 min; S600. After the squeezing is over, the power motor rotates to drive the conveyor steel belt to move and move the distributor. When the lower end of the distributor gradually disengages from the conveyor steel belt and the distributor still moves horizontally, the squeezed sludge is discharged from the lower end of the distributor under the action of gravity; After the squeezed sludge is discharged, the power motor rotates in reverse to move the distributor to the initial position and wait for the next feeding of the secondary sludge, and so on in a cycle.

8. The municipal sludge full-chain deep treatment process according to claim 7, characterized in that, In step S100, the added flocculant is polyacrylamide; in step S200, the added sludge conditioner to the conditioning tank is polyaluminum ferric double salt; The addition amount of the flocculant is 0.3‰ - 1‰ of the dry basis mass of the sludge, and the addition amount of the sludge conditioner is 5% - 20% of the dry basis mass of the sludge.

Images