Sewage sludge reduction and dewatering device

Abstract

The present application relates to the field of sewage treatment, especially to a sewage sludge reduction and dewatering device, a plurality of low-pressure squeezing rollers, a plurality of dynamic adjustment squeezing rollers, a plurality of high-pressure squeezing rollers, a filter pressing belt one and a filter pressing belt two are arranged in the middle of the machine body, the filter pressing belt one is sequentially arranged on each low-pressure squeezing roller, each dynamic adjustment squeezing roller and each high-pressure squeezing roller, and the filter pressing belt two is arranged on the filter pressing belt two. In the present application, when the roller body framework bears different sludge pressures, the position of the snap ring on the connecting plate is changed to change the diameter of the roller body, thereby changing the squeezing pressure between the filter belt, and when the diameter of the roller body changes, the inflation air bag and the energy storage cover and other components can realize self-adaptive matching of air pressure to meet the support stability of the roller body and the efficiency of diameter dynamic adjustment, thereby effectively dynamically adjusting different sludge pressures, accurately matching the squeezing pressure value, realizing self-adaptive dewatering pressure adjustment, adapting to different sludge characteristics and improving the dewatering efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to sewage treatment technical field, especially to a sewage sludge reduction dewatering device. BACKGROUND

[0002] Dewatering is an important link of sludge treatment, which aims to remove most of the water in the sludge, and the solid after dewatering is highly enriched, and the volume of sludge is greatly reduced to save the cost of sludge treatment; among them, the belt dewatering machine has good effect on sewage sludge with high organic matter content and high viscosity (such as municipal sludge), which realizes dewatering through extrusion and shearing force, and can extrude and dewater the sludge to form a mud cake for subsequent treatment.

[0003] In the prior art, the filter belt is wound in S shape on the press roller in the actual application process of the belt filter dewatering machine, but the properties of the sludge (such as water content, viscosity, particle size, etc.) may change during the treatment process. The press roller of the traditional filter equipment is mainly a single cylinder structure, and is provided with low pressure area and high pressure area for staged pressing. If the sludge cannot be effectively and preliminarily dewatered in the low pressure area, the working burden of the subsequent high pressure area will be increased. The high pressure area cannot dynamically adjust the pressure values of different working dewatering areas according to the properties of the sludge, the pressure cannot be effectively matched, and the dewatering efficiency cannot be guaranteed. SUMMARY

[0004] The purpose of the present application is to solve the problems existing in the prior art, and to provide a sewage sludge reduction dewatering device.

[0005] In order to achieve the above purpose, the technical scheme is as follows:

[0006] A sewage sludge reduction dewatering device, comprising a machine body, a plurality of low-pressure press rollers, a plurality of dynamic adjustment press rollers, a plurality of high-pressure press rollers, a filter press belt one and a filter press belt two are arranged in the middle of the machine body, the filter press belt one is wound on each low-pressure press roller, each dynamic adjustment press roller and each high-pressure press roller in turn, and the filter press belt two is wound on the filter press belt two;

[0007] The dynamic adjustment press roller comprises a mounting roller and a plurality of groups of roller body skeletons one and two, a plurality of groups of roller body skeletons one and two are mounted on the outer side of the mounting roller through a plurality of connecting plates, and adjacent roller body skeletons one and two are connected to form a cylinder skeleton;

[0008] Energy storage covers are arranged at both ends of the mounting roller, and an expansion air bag is arranged in the middle to connect the support connecting plate. The energy storage cover and the expansion air bag are communicated through an air inlet pipe. A slip ring is slidably assembled on the air inlet pipe. The slip ring is connected with each connecting plate through a connecting rod. Each connecting plate is driven in linkage through a linkage gear set. When the slip ring moves, the slip ring drives the limiting cylinder to move through the spring piece two to control the opening and closing state switching of the internal air passage of the limiting cylinder.

[0009] The inner wall of the installation roller is embedded with a snap ring, which protrudes into the inner wall of the second cavity. In the natural state, the connecting plate extends into the installation roller and is limited by the snap ring through the snap groove.

[0010] In addition, preferably, the upper part of the machine body is provided with a gravity dewatering area, and the upper part of the gravity dewatering area is provided with a feeding port for introducing materials.

[0011] In addition, preferably, the machine body is provided with a conveying roller one and a conveying roller two on one side, and the conveying roller one and the conveying roller two are driven to rotate by a driving motor. The conveying roller one is used to drive the movement of the filter belt two, and the conveying roller two is used to drive the movement of the filter belt one.

[0012] In addition, preferably, the roller body skeleton one and the roller body skeleton two are rotatably assembled on the upper part of the connecting plate through a connecting pin, and a torsional spring is installed at the rotating connection between the connecting pin and the connecting plate. The roller body skeleton one, the roller body skeleton two, and the connecting plate are connected to each other to form a "T" shaped whole.

[0013] One side of the roller body skeleton one is provided with a limiting slot, and one side of the roller body skeleton two is provided with an extension frame, which are connected to each other.

[0014] In addition, preferably, the filter belt one is wound around the conveying roller two, the low-pressure squeezing roller, the dynamic adjustment squeezing roller, the high-pressure squeezing roller, and the tensioning roller to form a closed loop.

[0015] The filter belt two is wound around the conveying roller one, the low-pressure squeezing roller, the dynamic adjustment squeezing roller, the high-pressure squeezing roller, and the conveying roller three to form a closed loop.

[0016] The tensioning roller is limitingly assembled on the mounting guide rail through a mounting block, and the mounting guide rail is assembled in the machine body. The mounting block is provided with a clamping spring on both sides, and the other end of the clamping spring is connected with the mounting guide rail.

[0017] In addition, preferably, the two ends of the installation roller are connected with the bearing seat.

[0018] In addition, preferably, each linkage gear set includes a pair of transmission gears meshing with each other, and a gap is arranged between each linkage gear set to assemble the connecting plate. The rack arranged at the bottom of the connecting plate is meshed with each transmission gear, and when the transmission gear in any gear set rotates, the transmission gear drives the rack to move.

[0019] The transmission gear is installed in the second cavity arranged inside the installation roller, and the side away from the second cavity is provided with a first cavity, and the first cavity is assembled with an inflatable air bag.

[0020] In addition, preferably, the outer wall of the mounting roller is provided with a plurality of connecting seats, and a connecting plate is assembled in the connecting seat in a limiting manner.

[0021] In addition, preferably, the inner wall of the energy storage cover is provided with a rubber diaphragm on one side, a closed cavity is formed between the rubber diaphragm and the energy storage cover, the cavity is filled with compressed gas, and the cavity is provided with a spring piece one.

[0022] The inner wall of the energy storage cover is provided with a through hole for assembling a limiting cylinder, and a dynamic opening and closing cover is arranged above the through hole, the dynamic opening and closing cover is slidably connected with the inner wall of the energy storage cover through a pair of convex columns, and a spring piece three is arranged between the dynamic opening and closing cover and the energy storage cover, when the dynamic opening and closing cover moves, the spring piece three deforms, and in a natural state, a gas passage three arranged on one side of the limiting cylinder is in extrusion contact with the dynamic opening and closing cover, thereby blocking the gas passage three.

[0023] In addition, preferably, the outer wall of the air inlet pipe is connected with the sliding ring in a limiting manner through a sliding groove, one end of the sliding ring is connected with the limiting cylinder in a limiting manner through a insertion groove, and the limiting cylinder and the sliding ring are connected through a spring piece two.

[0024] The middle part of the air inlet pipe is provided with a gas passage one and a gas passage two, and the middle part of the limiting cylinder is provided with a gas passage three and a gas passage four, the gas passage one is connected with the gas passage three, and the gas passage two is connected with the gas passage four.

[0025] One end of the gas passage one is provided with a one-way rotary valve plate two in a corresponding manner, and one end of the gas passage two is provided with a one-way rotary valve plate one in a corresponding manner.

[0026] The beneficial effects of the present application are:

[0027] First, in the present application, the roller body framework is composed of mutually linked framework units, the frameworks are connected in a circumferential linkage contraction manner through groove blocks, pin shafts and torsional spring structures, compared with the traditional fixed roller diameter structure, when the roller body framework bears different sludge pressures, the diameter of the roller body framework can be expanded or contracted by changing the position of the snap ring on the connecting plate, so that the size of the roller body can be changed, the sludge pressure can be accurately matched, efficient squeezing can be realized, and the dewatering efficiency can be improved.

[0028] Second, in the present application, when the diameter of the roller body changes, the double-chamber balancing mechanism composed of the inflatable air bag and the energy storage cover and other components can realize self-adaptive matching of air pressure, during the pressure change process of the inflatable air bag, the limiting cylinder will move to change the gas flow state between the inflatable air bag and the energy storage cover, so as to meet the support stability of the roller body framework and the efficiency of the diameter dynamic adjustment, thereby effectively dynamically adjusting different sludge pressures, accurately matching the squeezing pressure value, realizing self-adaptive dewatering pressure adjustment, adapting to different sludge characteristics, and improving the dewatering efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 An external structure schematic diagram of a sewage sludge reduction and dewatering device according to the present application is provided.

[0030] Figure 2 A press filter belt installation structure schematic diagram according to the present application is provided.

[0031] Figure 3 A press filter belt partial installation structure schematic diagram according to the present application is provided.

[0032] Figure 4 An explosion schematic diagram of a dynamic adjustment press roller internal structure according to the present application is provided.

[0033] Figure 5 A roller body skeleton one, roller body skeleton two, and connecting plate connecting structure schematic diagram according to the present application is provided.

[0034] Figure 6 A roller body skeleton one and roller body skeleton two connecting structure schematic diagram according to the present application is provided.

[0035] Figure 7 An installation roller internal structure schematic diagram according to the present application is provided.

[0036] Figure 8 An installation roller internal structure partial schematic diagram according to the present application is provided.

[0037] Figure 9 An installation roller internal structure explosion schematic diagram according to the present application is provided.

[0038] Figure 10 An installation roller internal structure cross-sectional view according to the present application is provided.

[0039] Figure 11 A connecting plate and snap ring butt joint structure schematic diagram according to the present application is provided.

[0040] Figure 12 An energy storage cover internal structure schematic diagram according to the present application is provided.

[0041] Figure 13 A limiting cylinder and air inlet pipe connecting structure cross-sectional view according to the present application is provided.

[0042] Figure 14 A tensioning roller installation structure schematic diagram according to the present application is provided.

[0043] In the figure: 1, the machine body; 101, the feed inlet; 102, the gravity dewatering area; 103, the filter press belt one; 104, the filter press belt two; 105, the conveying roller one; 106, the conveying roller two; 107, the drive motor; 2, the low-pressure press roller; 3, the high-pressure press roller; 4, the roller body skeleton one; 41, the roller body skeleton two; 42, the extension frame; 43, the connecting pin; 5, the tensioning roller; 6, the conveying roller three; 7, the mounting guide rail; 71, the jacking spring; 72, the mounting block; 8, the energy storage cover; 9, the bearing seat; 10, the mounting roller; 11, the connecting seat; 12, the inflatable air bag; 13, the connecting plate; 14, the torsional spring; 15, the limiting groove; 16, the air inlet pipe; 161, the chute; 17, the transmission gear; 18, the rack; 19, the limiting cylinder; 20, the snap ring; 21, the rubber diaphragm; 22, the spring part one; 23, the connecting rod; 24, the dynamic opening and closing cover; 25, the spring part two; 26, the slip ring; 27, the clamping groove; 28, the chamber one; 29, the chamber two; 30, the spring part three; 31, the one-way rotary valve plate one; 32, the one-way rotary valve plate two; 33, the air passage one; 331, the air passage two; 34, the air passage three; 341, the air passage four; 35, the insertion slot. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments.

[0045] REFERENCE Figures 1-4 A sewage sludge reduction dewatering device, comprising a machine body 1, the upper part of the machine body 1 is provided with a gravity dewatering area 102, the upper part of the gravity dewatering area 102 is provided with a feed inlet 101 for discharging sludge, one side of the machine body 1 is provided with a conveying roller one 105 and a conveying roller two 106 driven by a drive motor 107, the conveying roller one 105 and the conveying roller two 106 pass through a filter press belt two 104 and a filter press belt one 103 in sequence.

[0046] The filter press belt one 103 and the filter press belt two 104 are driven in sequence by the conveying roller two 106 and the conveying roller one 105.

[0047] A plurality of groups of low-pressure press rollers 2, dynamic adjustment press rollers and high-pressure press rollers 3 are arranged in the middle of the machine body 1 in an upper-lower staggered manner, the low-pressure press rollers 2 are close to one side of the conveying roller one 105, and the low-pressure press rollers 2 preferentially roll and dewater the sludge.

[0048] A tensioning roller 5 and a conveying roller three 6 are arranged away from one side of the high-pressure press roller 3, the tensioning roller 5 is used for mounting the filter press belt one 103, and the conveying roller three 6 is used for mounting the filter press belt two 104.

[0049] The filter belt 103 is arranged around the conveying roller 106, the low-pressure squeezing roller 2, the dynamic adjustment squeezing roller, the high-pressure squeezing roller 3 and the tensioning roller 5 to form a closed loop.

[0050] The filter belt 104 is arranged around the conveying roller 105, the low-pressure squeezing roller 2, the dynamic adjustment squeezing roller, the high-pressure squeezing roller 3 and the conveying roller 6 to form a closed loop.

[0051] The dynamic adjustment squeezing roller is arranged between the low-pressure squeezing roller 2 and the high-pressure squeezing roller 3 to play a transition buffering role between the low-pressure and high-pressure dehydration zones.

[0052] Specifically, the dynamic adjustment squeezing roller comprises a mounting roller 10, a roller body framework 4 and a roller body framework 41. A plurality of groups of the roller body framework 4 and the roller body framework 41 are symmetrically arranged on the mounting roller 10 through a connecting plate 13. Each group of the roller body framework 4 and the roller body framework 41 is connected to each other to form a cylindrical body, and the filter belt is arranged outside the roller body framework 4 and the roller body framework 41.

[0053] Both ends of the mounting roller 10 are connected with bearing seats 9 to realize rotary motion.

[0054] Both ends of the mounting roller 10 are provided with energy storage covers 8.

[0055] Referring to Figures 4-6 The upper wall of the mounting roller 10 is provided with a plurality of connecting seats 11 for assembling the connecting plate 13. The upper part of the connecting plate 13 is symmetrically rotatably provided with the roller body framework 4 and the roller body framework 41 through connecting pins 43. The connecting plate 13, the roller body framework 4 and the roller body framework 41 are integrally connected and form a "T" shape.

[0056] A torsional spring 14 is arranged at the rotary connection between each connecting pin 43 and the connecting plate 13. The torsional spring 14 always generates torsional force that deflects outward, so that the corresponding roller body framework 4 and the roller body framework 41 connected with the connecting pin 43 deflect outward in a natural state, thereby ensuring that the adjacent roller body framework 4 and the roller body framework 41 are connected and supported to form a cylindrical body.

[0057] One side of the roller body framework 4 is provided with a limiting groove 15, and one side of the roller body framework 41 is provided with an extension frame 42. The extension frame 42 and the limiting groove 15 are connected with each other as a connecting mechanism. When the adjacent roller body framework 4 and the roller body framework 41 are connected, the extension frame 42 is limitingly and slidably arranged in the limiting groove 15.

[0058] The outer diameter size of the cylindrical framework formed by the mutual connection of the roller body framework 4 and the roller body framework 41 can be changed through the mutual movement between each group of adjacent roller body framework 4 and roller body framework 41.

[0059] Referring to Figures 7-11The bottom end of each connecting plate 13 extends into the inside of the installation roller 10 through the connecting seat 11. The connecting plate 13 is provided as a segmented plate body. The middle part of the connecting plate 13 independently extends into the chamber one 28 provided in the inside of the installation roller 10 and is connected with the outer wall of the expansion air bag 12 provided in the chamber one 28.

[0060] The two ends of the connecting plate 13 are sequentially provided with a plurality of racks 18 and simultaneously extend into the chamber two 29 provided in the inside of the installation roller 10.

[0061] The chamber two 29 is provided on the two sides away from the chamber one 28. The chamber one 28 and the chamber two 29 are separated.

[0062] The inside of the chamber one 28 is provided with the expansion air bag 12. The inside of the expansion air bag 12 is filled with compressed gas. The middle part of one side of the expansion air bag 12 is connected with the air inlet pipe 16. The other end of the air inlet pipe 16 extends into the chamber two 29.

[0063] Further, a plurality of gear sets are installed on the inside of the chamber two 29. Each gear set is provided with a pair of transmission gears 17 which are meshed with each other. A gap is provided between each gear set to assemble the connecting plate 13. The rack 18 provided on the bottom of the connecting plate 13 is meshed with the transmission gear 17. When the transmission gear 17 in any gear set rotates through the movement of the rack 18, the transmission gear 17 in this set drives the transmission gear 17 which is meshed with another adjacent transmission gear 17 to rotate. Then, the adjacent transmission gear 17 drives the connecting plate 13 in another direction to move in linkage.

[0064] Further, the bottom of each connecting plate 13 is rotatably assembled with a connecting rod 23. The other end of each connecting rod 23 is rotatably connected with a sliding ring 26. The sliding ring 26 is limitingly and slidably installed on the outer wall of the air inlet pipe 16 through a sliding groove 161. When the connecting plate 13 moves vertically, the connecting rod 23 drives the sliding ring 26 to slide horizontally on the outer wall of the air inlet pipe 16.

[0065] One side of the air inlet pipe 16 is limitingly connected with a limiting cylinder 19. One end of the limiting cylinder 19 extends into the energy storage cover 8.

[0066] One side of the inner wall of the energy storage cover 8 is provided with a rubber diaphragm 21. The rubber diaphragm 21 and the energy storage cover 8 form a sealed cavity. The cavity is filled with compressed gas. A spring part one 22 is provided in the cavity.

[0067] Further, the sliding ring 26 and the limiting cylinder 19 are connected through a spring part two 25.

[0068] Further, a snap ring 20 is embedded on one side of the inner wall of the chamber two 29. The snap ring 20 protrudes from the inner wall of the chamber two 29. In the natural state, the connecting plate 13 extends into the chamber two 29. The connecting plate 13 is limited by the snap ring 20.

[0069] The connecting plate 13 has multiple arc-shaped slots 27 vertically opened on the side facing the retaining ring 20. The slots 27 are spaced equally apart and engage with the retaining ring 20.

[0070] The different snapping positions of the slot 27 and the snap ring 20 correspond to the different outer diameter dimensions of the overall roller frame.

[0071] The top side of the slot 27 is designed as a horizontal section to ensure the stability of the engagement with the retaining ring 20, and the bottom side of the slot 27 is chamfered to facilitate the upward movement and reset of the connecting plate 13.

[0072] Reference Figures 12-13 , Figure 10 The limiting cylinder 19 has a slot 35 inside to connect to the air inlet pipe 16. The air inlet pipe 16 has an air passage 33 and an air passage 331 in the middle, and the limiting cylinder 19 has an air passage 34 and an air passage 341 in the middle. The air passage 33 and the air passage 34 are connected to each other, and the air passage 231 and the air passage 441 are connected to each other.

[0073] Furthermore, a through hole is provided on one side of the inner wall of the energy storage cover 8 to assemble the limiting cylinder 19, and a dynamic opening and closing cover 24 is provided above the through hole. The dynamic opening and closing cover 24 is slidably connected to the energy storage cover 8 through a pair of protrusions, and is connected to the energy storage cover 8 through a spring member 30. When the dynamic opening and closing cover 24 moves, the spring member 30 deforms.

[0074] In its natural state, the air passage 34 on one side of the limiting cylinder 19 is squeezed and engaged with the dynamic opening and closing cover 24 to block the air passage 34.

[0075] Reference Figure 14 The tension roller 5 is mounted on the mounting guide rail 7 by the mounting block 72, and the mounting block 72 has the same top spring 71 on both sides, and the other end of the top spring 71 is connected to the mounting guide rail 7.

[0076] In this embodiment, the machine body 1 introduces the sludge to be treated through the feed inlet 101 and discharges the sludge to a gravity dewatering zone 102. The sludge is then dewatered by gravity through the first filter belt 103. The machine body 1 then introduces the sludge between the first filter belt 103 and the second filter belt 104. The sludge passes through the gap between the rollers in sequence and is gradually fed into the low-pressure pressing roller 2. Under the combined action of the shearing force and the extrusion force of the roller and the belt, the water is squeezed out.

[0077] In this process, the roller body diameter of the low-pressure squeezing roller 2 is large, the arc length of the filter belt one 103 and the filter belt two 104 in contact with the surface thereof is long, the pressure is low and dispersed, so that the water in the sludge can be effectively preliminarily squeezed, the squeezing pressure of the low-pressure squeezing roller 2 stage is relatively low, which is helpful to further remove the free water in the sludge, and at the same time, the sludge is gradually solidified, which prepares for the subsequent high-pressure squeezing.

[0078] With the continuous conveying of the conveying roller one 105 and the conveying roller two 106, the sludge after low-pressure dewatering enters the dynamic adjusting squeezing roller one, and is in contact with the roller body skeleton one 4 and the roller body skeleton two 41 for squeezing and dewatering;

[0079] The sludge pressure is directly applied to the roller body skeleton one 4 and the roller body skeleton two 41, and an action force towards the center direction of the mounting roller 10 is applied to the skeleton body, and the roller body skeleton one 4 and the roller body skeleton two 41 move downward through the connecting plate 13;

[0080] The snap ring 20 for limiting the movement of the connecting plate 13 is arranged in the mounting roller 10, the snap ring 20 is clamped with the clamping groove 27 opened in the inner side of the connecting plate 13 to constrain the movement of the connecting plate 13, and due to the downward action force, when the action force (sludge pressure) is large enough, the connecting plate 13 will forcibly break through the snap ring 20 and move downward, so that the snap ring 20 is clamped into another adjacent clamping groove 27, and at this time, the position of the connecting plate 13 is lowered;

[0081] At this time, due to the lowered position of the connecting plate 13, the roller body skeleton one 4 and the roller body skeleton two 41 move towards each other (shrink), the outer diameter of the overall cylindrical skeleton formed by the connection of the roller body skeleton one 4 and the roller body skeleton two 41 is reduced, the contact arc length of the filter belt with the surface of the roller body skeleton one 4 and the roller body skeleton two 41 is reduced, the local pressure is increased, and the dewatering pressure is further improved.

[0082] Synchronously, the connecting plate 13 moves downward synchronously with the rack 18, the rack 18 is engaged with the transmission gear 17 to realize synchronous movement, and then the connecting plate 13 synchronously pushes the slip ring 26 arranged on the wall of the air inlet pipe 16 through the connecting rod 23 to move;

[0083] The slip ring 26 is pushed by the connecting rod 23 and moves to the side of the energy storage cover 8, and at the same time, the slip ring 26 pushes the limiting cylinder 19 through the spring member two 25, the limiting cylinder 19 pushes the dynamic opening and closing cover 24, so that the dynamic opening and closing cover 24 is stretched by the spring member three 30 to stabilize the air passage three 34 on the upper part of the limiting cylinder 19, so as to block the gas flow of the air passage one 33;

[0084] The inflatable air bag 12 is deformed under the downward action force, so that the compressed gas inside escapes to the energy storage cover 8 through the air inlet pipe 16, and accumulates in the energy storage cover 8 to generate corresponding air pressure, and the air pressure compresses the rubber diaphragm 21 and the spring member one 22 arranged in the energy storage cover 8;

[0085] Due to the setting of the one-way rotating valve plate 31, gas cannot escape into the inflatable air bag 12 through the air passage four 341 and the air passage two 331.

[0086] At this time, the roller body skeleton one 4 and the roller body skeleton two 41 dynamically adjust the outer diameter of the cylinder body according to the sludge pressure of the corresponding position to achieve the effect of stable squeezing dehydration. At this time, the sludge pressure of the corresponding process position tends to be constant, and the outer diameter of the roller body skeleton no longer changes. Under various forces, the air pressure in the inflatable air bag 12 and the energy storage cover 8 remains stable, causing the connecting plate 13 to be stably supported.

[0087] More specifically, the dynamic adjustment squeezing roller is provided with multiple groups. In the continuous conveying process of the sludge, the dynamic adjustment squeezing rollers at different process positions bear different sludge pressures. Due to the different properties of the sludge (its internal water, particles, and solids), the dynamic adjustment squeezing roller at the previous process will work with the same or slightly smaller skeleton diameter as the low-pressure squeezing roller 2, thereby efficiently and stably fully squeezing the sludge water (due to the large water content of the sludge in the early stage, the pressure applied is low and dispersed), and accurately applying the optimal pressure.

[0088] The dynamic adjustment squeezing roller at the later process will concentrate the dehydration of the solid sludge with a smaller diameter. As the process goes further, the dynamic adjustment squeezing roller closer to the high-pressure squeezing roller 3 will be squeezed with a smaller diameter closer to that of the high-pressure squeezing roller 3 to relieve the operating pressure of the high-pressure squeezing roller 3.

[0089] On the contrary, due to the different properties of the sludge (its internal water, particles, and solids), the diameter of the dynamic adjustment squeezing roller at the previous process will not decrease in a stable and gradual manner during actual application. When the sludge pressure after dehydration in the previous process does not reach the displacement trigger threshold of the connecting plate 13 in the later process (i.e., the restraining force generated by the extrusion of the snap ring 20 and the snap groove 27), the later process will run with the same diameter.

[0090] For sludge with a high water content, the low-pressure squeezing roller 2 and the dynamic adjustment squeezing roller have similar diameters, increasing the squeezing time and pressure in the low-pressure dehydration area to reduce the amount of sludge entering the high-pressure dehydration area, thereby reducing the burden on the high-pressure dehydration area. At this time, the diameter of the pre-squeezing roller (low-pressure squeezing roller 2 and dynamic adjustment squeezing roller) is larger to uniformly squeeze the water.

[0091] The rollers at the later process perform secondary crushing on the sludge after squeezing out the water. At this time, due to the lack of water, the overall structure (particles, viscous substances, and solids) in the sludge coagulates together, making the whole harder and increasing the contact pressure with the roller surface. At this time, the diameter of the roller body skeleton is correspondingly reduced to provide higher pressure and shear force.

[0092] Wherein, in the actual application process, when the sludge pressure of the roller body framework one 4 and the roller body framework two 41 surface disappears or reduces, the spring one 22 and the spring two 25 reset and rebound, the inflation air bag 12 deforms, the limiting cylinder 19 is reduced under the top pressure of the sliding ring 26, so that it resets and moves, at this time, the air passage three 34 on the upper part of the limiting cylinder 19 is no longer in contact with the dynamic opening and closing cover 24, and the compressed gas reenters the inflation air bag 12 from the air passage three 34 and the air passage one 33;

[0093] The one-way rotary valve plate two 32 is arranged at the passage of the air passage one 33, and the one-way rotary valve plate one 31 is arranged at the passage of the air passage two 331, wherein the one-way rotary valve plate two 32 is deflected to the outside by the torsional spring to prevent the gas in the inflation air bag 12 from escaping to the energy storage cover 8 through the air passage one 33;

[0094] The one-way rotary valve plate one 31 is deflected to the inside by the torsional spring to prevent the gas in the energy storage cover 8 from escaping to the inflation air bag 12 through the air passage two 331 and the air passage four 341.

[0095] Wherein, it is worth noting that the machine body 1 is a belt filter press;

[0096] Wherein, in the actual application process, the adjacent roller body framework one 4 and the roller body framework two 41 are moved by the limiting groove 15 and the extension frame 42 to change the distance between the roller body framework one 4 and the roller body framework two 41, so as to increase or decrease the diameter of the cylinder framework.

[0097] Under the action of the torsional spring 14, each group of roller body framework one 4 and roller body framework two 41 generates an outward deflection force, which ensures that the framework body is always in an inflated and saturated cylindrical shape.

[0098] Wherein, in the actual application process, the inflation air bag 12 is filled with compressed gas and is in an inflated state under natural conditions to effectively support the connecting plate 13.

[0099] Wherein, in the actual application process, a dynamic sealing element is arranged at the connection between the limiting cylinder 19 and the energy storage cover 8 to ensure the sealing performance, and the sealing element is arranged to ensure the normal operation of the device, which is a conventional arrangement in this technical field and will not be explained.

[0100] Wherein, in the actual application process, the transmission gear 17 is arranged in two groups, which are respectively used to correspond to the plurality of connecting plates 13 arranged on the transmission installation roller 10, and with the rotation of one transmission gear 17, the adjacent arranged rack 18 and transmission gear 17 are synchronously transmitted, thereby realizing the synchronous linkage movement of the connecting plate 13.

[0101] In the actual application process, the connecting plate 13 is pressed down, and the inflatable air bag 12 is extruded at the same time.

[0102] In the actual application process, the roller body skeleton one 4 and the roller body skeleton two 41 change the overall skeleton diameter when they are adjusted towards each other, so that the filter press belt one 103 and the filter press belt two 104 produce different tension values. At this time, the position of the tensioning roller 5 can be dynamically adjusted by installing the guide rail 7 and the jacking spring 71 to achieve stable tensioning.

[0103] In the actual application process, the driving motor 107 drives the conveying roller one 105 and the conveying roller two 106 to rotate, and the conveying roller one 105 and the conveying roller two 106 in turn drive the filter press belt two 104 and the filter press belt one 103 to move.

[0104] The gravity dewatering area 102 is provided with the filter press belt one 103 in the gravity dewatering area 102, and the water in the sludge is naturally discharged by the natural gravity. The specific gravity dewatering area 102 (dewatering principle) not explained in detail above is the common knowledge of those skilled in the art, and will not be explained.

[0105] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacement or change according to the technical solution and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A sewage sludge reduction and dewatering device comprising a machine body (1), characterized in that, The middle part of the machine body (1) is provided with a plurality of low-pressure squeezing rollers (2), a plurality of dynamic adjustment squeezing rollers, a plurality of high-pressure squeezing rollers (3), a filter belt one (103) and a filter belt two (104), the filter belt one (103) is sequentially wound on each low-pressure squeezing roller (2), each dynamic adjustment squeezing roller and each high-pressure squeezing roller (3), the filter belt two (104) is wound on the conveying roller one (105), the low-pressure squeezing roller (2), the dynamic adjustment squeezing roller, the high-pressure squeezing roller (3) and the conveying roller three (6), and a closed loop is formed in this way. The dynamic adjustment squeezing roller comprises a mounting roller (10) and a plurality of groups of roller body skeletons one (4) and roller body skeletons two (41), the outer side of the mounting roller (10) is provided with a plurality of groups of roller body skeletons one (4) and roller body skeletons two (41) through a plurality of connecting plates (13), and adjacent roller body skeletons one (4) and roller body skeletons two (41) are connected with each other to form a cylinder body skeleton. The two ends of the mounting roller (10) are provided with energy storage covers (8), and the middle part is provided with an expansion air bag (12) to connect and support the connecting plate (13), the energy storage cover (8) and the expansion air bag (12) are communicated through an air inlet pipe (16), a sliding ring (26) is slidably assembled on the air inlet pipe (16), the sliding ring (26) is connected with each connecting plate (13) through a connecting rod (23), each connecting plate (13) is driven by a linkage gear set, and when the sliding ring (26) moves, the sliding ring (26) drives the limiting cylinder (19) to move through the second spring (25) to control the opening and closing state switching of the internal air passage of the limiting cylinder (19). The inner wall of the mounting roller (10) is embedded with a snap ring (20), the snap ring (20) protrudes from the inner wall of the cavity two (29), in the natural state, the connecting plate (13) extends into the mounting roller (10) and is limited by the snap ring (20) through the clamping groove (27). The roller body skeleton one (4) and the roller body skeleton two (41) are rotatably assembled on the upper part of the connecting plate (13) through a connecting pin (43), and a torsional spring (14) is arranged at the rotating connection position of the connecting pin (43) and the connecting plate (13), and the roller body skeleton one (4), the roller body skeleton two (41) and the connecting plate (13) are connected with each other to form a "T" shaped whole. One side of the roller body skeleton one (4) is provided with a limiting groove (15), and one side of the roller body skeleton two (41) is provided with an extension frame (42), and the extension frame (42) and the limiting groove (15) are connected with each other.

2. The sewage sludge reduction and dewatering device according to claim 1, characterized in that, The upper part of the machine body (1) is provided with a gravity dehydration area (102), and the upper part of the gravity dehydration area (102) is provided with a feeding port (101) to introduce materials.

3. The sewage sludge reduction and dewatering device according to claim 1, characterized in that, One side of the machine body (1) is provided with a conveying roller one (105) and a conveying roller two (106), the conveying roller one (105) and the conveying roller two (106) are driven to rotate by a driving motor (107), the conveying roller one (105) is used to drive the filter belt two (104) to move, and the conveying roller two (106) is used to drive the filter belt one (103) to move.

4. The sewage sludge reduction and dewatering device according to claim 1, characterized in that, The first filter belt (103) is arranged around the second conveying roller (106), the low-pressure squeezing roller (2), the dynamic adjusting squeezing roller, the high-pressure squeezing roller (3) and the tensioning roller (5) to form a closed loop. The tensioning roller (5) is limitingly assembled on the mounting guide rail (7) through the mounting block (72), the mounting guide rail (7) is assembled in the machine body (1), and the two sides of the mounting block (72) are both provided with the tensioning spring (71), and the other end of the tensioning spring (71) is connected with the mounting guide rail (7).

5. The sewage sludge reduction and dewatering device according to claim 1, characterized in that The two ends of the mounting roller (10) are connected with the bearing seat (9).

6. A sewage sludge reduction and dewatering device according to claim 1, characterized in that Each linkage gear set comprises a pair of mutually meshing transmission gears (17), and a gap is arranged between each linkage gear set to assemble the connecting plate (13), the rack (18) arranged at the bottom of the connecting plate (13) is meshed with each transmission gear (17), and when the transmission gear (17) in any gear set rotates, the transmission gear (17) drives the rack (18) to move; The transmission gear (17) is installed in the second cavity (29) arranged in the mounting roller (10), a first cavity (28) is arranged on the side away from the second cavity (29), and the first cavity (28) is assembled with the inflatable air bag (12).

7. The sewage sludge reduction and dewatering device according to claim 1, characterized in that The outer wall of the mounting roller (10) is provided with a plurality of connecting seats (11), and the connecting plate (13) is limitingly assembled in the connecting seat (11).

8. The device for sludge reduction and dewatering of sewage according to claim 1, characterized in that, The inner wall of the energy storage cover (8) is provided with a rubber diaphragm (21), a closed cavity is formed between the rubber diaphragm (21) and the energy storage cover (8), the cavity is filled with compressed gas, and a first spring member (22) is arranged in the cavity; A through hole is formed in one side of the inner wall of the energy storage cover (8) to assemble the limiting cylinder (19), and a dynamic opening and closing cover (24) is arranged above the through hole, the dynamic opening and closing cover (24) is slidably connected with the inner wall of the energy storage cover (8) through a pair of convex columns, and the dynamic opening and closing cover (24) is connected with the energy storage cover (8) through a third spring member (30), when the dynamic opening and closing cover (24) moves, the third spring member (30) deforms, and in the natural state, the air passage three (34) arranged on one side of the limiting cylinder (19) is in extrusion contact connection with the dynamic opening and closing cover (24), thereby blocking the air passage three (34).

9. The device for sludge reduction and dewatering of sewage according to claim 1, characterized in that, The outer wall of the air inlet pipe (16) is limitingly connected with the sliding ring (26) through the sliding groove (161), one end of the sliding ring (26) is limitingly installed into the inside of the limiting cylinder (19) through the insertion groove (35), and the limiting cylinder (19) and the sliding ring (26) are connected through the second spring member (25); The middle part of the air inlet pipe (16) is provided with an air passage one (33) and an air passage two (331), and the middle part of the limiting cylinder (19) is provided with an air passage three (34) and an air passage four (341), the air passage one (33) is communicated with the air passage three (34), and the air passage two (331) is communicated with the air passage four (341). One end of the air passage one (33) is correspondingly provided with a one-way rotating valve plate two (32), and one end of the air passage two (331) is correspondingly provided with a one-way rotating valve plate one (31).

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