Sewage sludge reduction dehydration device

Abstract

The invention relates to the field of sewage treatment, in particular to a sewage sludge reduction dewatering device which is characterized in that a plurality of low-pressure press rollers, a plurality of dynamic adjustment press rollers, a plurality of high-pressure press rollers, a first filter pressing belt and a second filter pressing belt are arranged in the middle of a machine body, and the first filter pressing belt is sequentially wound on each low-pressure press roller, each dynamic adjustment press roller and each high-pressure press roller; and the filter pressing belt II is wound on the filter pressing belt II. In the invention, when the roller body framework bears different sludge pressures, the diameter of the roller body is changed by changing the position of the clamping ring on the connecting plate, so that the squeezing pressure between the roller body framework and the filter belt is changed, and when the diameter of the roller body is changed, the components such as the expansion air bag and the energy storage cover can realize air pressure self-adaptive matching; the supporting stability of the roller body and the high efficiency of diameter dynamic adjustment are met, then different sludge pressures can be effectively and dynamically adjusted, the squeezing pressure value is accurately matched, self-adaptive dewatering pressure adjustment is achieved, different sludge characteristics are adapted, and the dewatering efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and particularly relates to a sewage sludge reduction and dehydration device. Background Art

[0002] Dehydration is an important link in sludge treatment. Its purpose is to remove most of the water in the sludge. After dehydration, the solids are highly concentrated, and the sludge volume is greatly reduced to save the cost of sludge treatment. Among them, the belt filter press has good effects on sewage sludge with high organic matter content and high viscosity (such as municipal sludge). It realizes dehydration through extrusion and shear force, and can extrude and dehydrate the sludge to form a mud cake for subsequent treatment.

[0003] In the prior art, in the actual application process of the belt filter press, the filter belt is wound around the pressing roller in an S shape. However, the properties of the sludge (such as moisture content, viscosity, particle size, etc.) may change during the treatment process. Most of the pressing rollers of traditional filtering equipment are of a single cylindrical structure, and are provided with a low-pressure area and a high-pressure area for hierarchical pressing. If the low-pressure area fails to effectively dehydrate the sludge initially, it will increase the workload of the subsequent high-pressure area. The high-pressure area cannot dynamically adjust the pressure values of different working dehydration areas according to the properties of the sludge, and the pressure cannot be effectively matched, so the dehydration efficiency cannot be guaranteed. Summary of the Invention

[0004] The purpose of the present invention is to solve the disadvantages existing in the prior art, and to propose a sewage sludge reduction and dehydration device.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions: A sewage sludge reduction and dehydration device includes a machine body. A plurality of low-pressure pressing rollers, a plurality of dynamically adjustable pressing rollers, a plurality of high-pressure pressing rollers, a first filter belt and a second filter belt are provided in the middle of the machine body. The first filter belt is sequentially wound around each low-pressure pressing roller, each dynamically adjustable pressing roller, and each high-pressure pressing roller, and the second filter belt is wound around the first filter belt; The dynamically adjustable pressing roller includes a mounting roller and multiple groups of roller body skeletons I and II. Multiple groups of roller body skeletons I and II are installed on the outer side of the mounting roller through a plurality of connecting plates. The adjacent roller body skeletons I and II are connected to each other to form a cylindrical skeleton; Energy storage covers are arranged at both ends of the mounting roller, and an expansion airbag is arranged in the middle to connect and support the connecting plates. The energy storage cover and the expansion airbag are communicated through an air inlet pipe. A sliding ring is slidably assembled on the air inlet pipe. The sliding ring is connected to each connecting plate through a connecting rod. Each connecting plate is driven to move through a linkage gear set. When the sliding ring moves, the sliding ring drives the limiting cylinder to move through a spring member II to control the opening and closing state switching of the internal air passage of the limiting cylinder; A snap ring is embedded on one side of the inner wall of the installation roller. The snap ring protrudes from the inner wall of Chamber Two. In the natural state, the connecting plate extends into the installation roller and is limited by the snap ring through the card slot.

[0006] In addition, a preferred structure is that a gravity dewatering area is provided at the upper part of the machine body, and a feed port is provided at the upper part of the gravity dewatering area to introduce materials.

[0007] In addition, a preferred structure is that a first conveyor roller and a second conveyor roller are installed on one side of the machine body. The first conveyor roller and the second conveyor roller are driven to rotate by a driving motor. The first conveyor roller is used to drive the second filter press belt to move, and the second conveyor roller is used to drive the first filter press belt to move.

[0008] In addition, a preferred structure is that the first roller body framework and the second roller body framework are rotationally assembled on the upper part of the connecting plate through a connecting pin, and a torsion spring is installed at the rotational connection between the connecting pin and the connecting plate. The first roller body framework, the second roller body framework, and the connecting plate are interconnected to form a "T"-shaped whole; A limiting groove is provided on one side of the first roller body framework, and an extension frame is provided on one side of the second roller body framework. The extension frame and the limiting groove are mutually connecting mechanisms.

[0009] In addition, a preferred structure is that the first filter press belt is wound around the second conveyor roller, the low-pressure squeezing roller, the dynamic adjustment squeezing roller, the high-pressure squeezing roller, and the tensioning roller, and a closed loop is formed thereby; The second filter press belt is wound around the first conveyor roller, the low-pressure squeezing roller, the dynamic adjustment squeezing roller, the high-pressure squeezing roller, and the third conveyor roller, and a closed loop is formed thereby; The tensioning roller is limited and assembled on the installation guide rail through an installation block. The installation guide rail is assembled in the machine body, and tightening springs are provided on both sides of the installation block. The other ends of the tightening springs are connected to the installation guide rail.

[0010] In addition, a preferred structure is that both ends of the installation roller are connected to the bearing seat.

[0011] In addition, a preferred structure is that each linkage gear set includes a pair of meshing transmission gears, and a gap is provided between each linkage gear set to assemble the connecting plate. The rack provided at the bottom of the connecting plate meshes with each transmission gear, and when the transmission gear in any one gear set rotates, the transmission gear drives the rack to move; The transmission gear is installed in Chamber Two provided inside the installation roller. A Chamber One is provided on the side away from Chamber Two, and an expansion airbag is assembled in Chamber One.

[0012] In addition, a preferred structure is that a plurality of connecting seats are provided on the outer wall of the installation roller, and the connecting plate is limited and assembled in the connecting seat.

[0013] In addition, a preferred structure is that a rubber diaphragm is provided on one side of the inner wall of the energy storage cover. A sealed cavity is formed between the rubber diaphragm and the energy storage cover. Compressed gas is filled in the cavity, and a first spring member is arranged in the cavity. A through hole is formed on one side of the inner wall of the energy storage cover for assembling a limiting cylinder. A dynamic opening and closing cover is arranged above the through hole. The dynamic opening and closing cover is slidably connected to the inner wall of the energy storage cover through a pair of convex columns, and a third spring member is connected between the dynamic opening and closing cover and the energy storage cover. When the dynamic opening and closing cover moves, the third spring member deforms. In the natural state, an air passage three provided on one side of the limiting cylinder is in extrusion contact connection with the dynamic opening and closing cover, thereby blocking the air passage three.

[0014] In addition, a preferred structure is that the outer wall of the air inlet pipe is limitedly connected with a sliding ring through a sliding groove. One end of the sliding ring is limitedly installed inside the limiting cylinder through a slot, and a second spring member is connected between the limiting cylinder and the sliding ring. An air passage one and an air passage two are formed in the middle of the air inlet pipe, and an air passage three and an air passage four are formed in the middle of the limiting cylinder. The air passage one communicates with the air passage three, and the air passage two communicates with the air passage four. A one-way rotating valve plate two is correspondingly installed in the middle of one end of the air passage one, and a one-way rotating valve plate one is correspondingly installed in the middle of one end of the air passage two.

[0015] The beneficial effects of the present invention are as follows: First, in the present invention, the roller body framework is composed of interlinked framework units. The frameworks are circumferentially linked and contracted through a groove block, a pin shaft, and a torsion spring structure. Compared with the traditional fixed roller diameter structure, when the roller body framework bears different sludge pressures, this mechanism realizes the radial expansion and contraction of the roller body framework by changing the position of the snap ring on the connecting plate to change the size of the roller body, can more accurately match the sludge pressure, realize efficient pressing, and improve the dehydration efficiency.

[0016] Second, in the present invention, when the diameter of the roller body changes, the double-chamber balance mechanism composed of an expansion airbag and components such as an energy storage cover can realize air pressure adaptive matching. During the pressure change process of the expansion airbag, the limiting cylinder will move immediately to change the gas flow state between the expansion airbag and the energy storage cover, so as to meet the support stability of the roller body framework and the high efficiency of diameter dynamic adjustment, and then can effectively dynamically adjust different sludge pressures, accurately match the pressing pressure value, realize adaptive dehydration pressure adjustment, adapt to different sludge characteristics, and improve the dehydration efficiency. Description of the Drawings

[0017] Figure 1 It is a schematic external structure diagram of a sewage and sludge reduction and dehydration device proposed by the present invention; Figure 2 It is a schematic installation structure diagram of a filter press belt proposed by the present invention; Figure 3Schematic diagram of a partial installation structure of the filter press belt proposed by the present invention; Figure 4 Exploded schematic diagram of the internal structure of the dynamic adjustment pressing roller proposed by the present invention; Figure 5 Schematic diagram of the connection structure of the roller body frame one, the roller body frame two, and the connecting plate proposed by the present invention; Figure 6 Schematic diagram of the connection structure of the roller body frame one and the roller body frame two proposed by the present invention; Figure 7 Schematic diagram of the internal structure of the installation roller proposed by the present invention; Figure 8 Partial schematic diagram of the internal structure of the installation roller proposed by the present invention; Figure 9 Exploded schematic diagram of the internal structure of the installation roller proposed by the present invention; Figure 10 Cross-sectional view of the internal structure of the installation roller proposed by the present invention; Figure 11 Schematic diagram of the docking structure of the connecting plate and the snap ring proposed by the present invention; Figure 12 Schematic diagram of the internal structure of the energy storage cover proposed by the present invention; Figure 13 Cross-sectional view of the connection structure of the limiting cylinder and the air inlet pipe proposed by the present invention; Figure 14 Schematic diagram of the installation structure of the tensioning roller proposed by the present invention.

[0018] In the figure: 1, machine body; 101, feed inlet; 102, gravity dewatering area; 103, filter press belt one; 104, filter press belt two; 105, conveyor roller one; 106, conveyor roller two; 107, drive motor; 2, low-pressure pressing roller; 3, high-pressure pressing roller; 4, roller body frame one; 41, roller body frame two; 42, extension frame; 43, connecting pin; 5, tensioning roller; 6, conveyor roller three; 7, installation guide rail; 71, top spring; 72, installation block; 8, energy storage cover; 9, bearing seat; 10, installation roller; 11, connecting seat; 12, expansion airbag; 13, connecting plate; 14, torsion spring; 15, limiting groove; 16, air inlet pipe; 161, chute; 17, transmission gear; 18, rack; 19, limiting cylinder; 20, snap ring; 21, rubber diaphragm; 22, spring member one; 23, connecting rod; 24, dynamic opening and closing cover; 25, spring member two; 26, slip ring; 27, card slot; 28, chamber one; 29, chamber two; 30, spring member three; 31, one-way rotating valve plate one; 32, one-way rotating valve plate two; 33, air duct one; 331, air duct two; 34, air duct three; 341, air duct four; 35, slot. Detailed implementation manners

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0020] Referring to Figure 1-4 , a sewage sludge reduction and dehydration device includes a machine body 1. A gravity dehydration area 102 is provided at the upper part of the machine body 1. A feed port 101 for discharging sludge is arranged above the gravity dehydration area 102. On one side of the machine body 1, a first conveyor roller 105 and a second conveyor roller 106 driven by a drive motor 107 are provided. A second filter belt 104 and a first filter belt 103 are successively wound around the first conveyor roller 105 and the second conveyor roller 106. The first filter belt 103 and the second filter belt 104 are respectively driven by the second conveyor roller 106 and the first conveyor roller 105 in sequence.

[0021] In the middle of the machine body 1, a plurality of groups of lower-pressure squeezing rollers 2, dynamically adjustable squeezing rollers, and high-pressure squeezing rollers 3 are arranged in a staggered manner up and down. The lower-pressure squeezing rollers 2 are close to the side of the first conveyor roller 105, and the lower-pressure squeezing rollers 2 first roll and dehydrate the sludge.

[0022] On the side far from the high-pressure squeezing rollers 3, a tensioning roller 5 and a third conveyor roller 6 are provided. The tensioning roller 5 is used to install the first filter belt 103, and the third conveyor roller 6 is used to install the second filter belt 104.

[0023] Among them, the first filter belt 103 is wound around the second conveyor roller 106, the lower-pressure squeezing roller 2, the dynamically adjustable squeezing roller, the high-pressure squeezing roller 3, and the tensioning roller 5, and forms a closed loop thereby; Among them, the second filter belt 104 is wound around the first conveyor roller 105, the lower-pressure squeezing roller 2, the dynamically adjustable squeezing roller, the high-pressure squeezing roller 3, and the third conveyor roller 6, and forms a closed loop thereby.

[0024] The dynamically adjustable squeezing roller is arranged between the lower-pressure squeezing roller 2 and the high-pressure squeezing roller 3, and plays a role of transition and buffering between the low-pressure and high-pressure dehydration areas; Specifically, the dynamically adjustable squeezing roller includes a mounting roller 10, a first roller body frame 4, and a second roller body frame 41. On the mounting roller 10, a plurality of groups of the first roller body frame 4 and the second roller body frame 41 are symmetrically arranged through a connecting plate 13. Each group of the first roller body frame 4 and the second roller body frame 41 are connected to each other to form a cylindrical body, and the filter belt is wound around the outer walls of the first roller body frame 4 and the second roller body frame 41.

[0025] Both ends of the mounting roller 10 are connected to the bearing seats 9 to achieve rotational movement.

[0026] Energy storage covers 8 are provided at both ends of the mounting roller 10.

[0027] Referring to Figure 4-6, the upper wall of the installation roller 10 is provided with multiple groups of connecting seats 11, and the connecting seats 11 are used to assemble the connecting plates 13. The upper parts of the connecting plates 13 are respectively and symmetrically rotatably installed with a roller body framework one 4 and a roller body framework two 41 through connecting pins 43. The connecting plates 13, the roller body framework one 4, and the roller body framework two 41 are integrally connected to form a "T" shape.

[0028] A torsion spring 14 is arranged at the rotational connection of each connecting pin 43 and the connecting plate 13. The torsion spring 14 always generates a torsional force that deflects outward, causing the corresponding roller body framework one 4 and roller body framework two 41 connected to the connecting pin 43 to deflect outward in the natural state, ensuring that adjacent roller body framework one 4 and roller body framework two 41 are connected and supported to form a cylindrical body.

[0029] Among them, a limiting groove 15 is opened on one side of the roller body framework one 4, and an extension frame 42 is arranged on one side of the roller body framework two 41. The extension frame 42 and the limiting groove 15 are mutually connecting mechanisms. When adjacent roller body framework one 4 and roller body framework two 41 are connected, the extension frame 42 is installed in the limiting groove 15 in a limited sliding manner.

[0030] Through the mutual movement between each group of adjacent roller body framework one 4 and roller body framework two 41, the outer diameter size of the cylindrical framework formed by the mutual connection of the roller body framework one 4 and the roller body framework two 41 is changed.

[0031] Refer to Figure 7-11 , the bottom end of each connecting plate 13 extends into the installation roller 10 through the connecting seat 11. The connecting plate 13 is set as a segmented plate body. The middle part of the connecting plate 13 independently extends into the chamber one 28 arranged inside the installation roller 10 and is connected to the outer wall of the expansion airbag 12 arranged in the chamber one 28; And multiple racks 18 are sequentially arranged at both ends of the connecting plate 13 and simultaneously extend into the chamber two 29 arranged inside the installation roller 10; Chamber two 29 is arranged on both sides away from chamber one 28, and there is a partition between chamber one 28 and chamber two 29; Among them, an expansion airbag 12 is arranged inside the chamber one 28. The expansion airbag 12 is filled with compressed gas, and the middle part of one side of the expansion airbag 12 is connected to the air inlet pipe 16. The other end of the air inlet pipe 16 extends into the chamber two 29.

[0032] Further, multiple sets of gear sets are installed on the inner side of the second chamber 29. A pair of meshing transmission gears 17 are provided in each set of gear sets, and a gap is provided between each set of gear sets for assembling the connecting plate 13. A rack 18 provided at the bottom of the connecting plate 13 meshes with the transmission gear 17. When the transmission gear 17 in any set of gear sets rotates due to the movement of the rack 18, this set of transmission gears 17 drives the rotation of another adjacent meshing transmission gear 17, and then the adjacent transmission gear 17 drives the connecting plate 13 in the other direction to perform a linkage movement.

[0033] Further, a connecting rod 23 is rotatably assembled at the bottom of each connecting plate 13. The other end of each connecting rod 23 is rotatably connected to a slip ring 26. The slip ring 26 is slidably installed on the outer wall of the intake pipe 16 through a chute 161. When the connecting plate 13 moves vertically, the connecting rod 23 drives the slip ring 26 to slide horizontally on the outer wall of the intake pipe 16; One side of the intake pipe 16 is connected to a limiting cylinder 19 in a limiting manner, and one end of the limiting cylinder 19 extends into the energy storage cover 8; One side of the inner wall of the energy storage cover 8 is provided with a rubber diaphragm 21. A sealed 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 provided in the cavity.

[0034] Further, the slip ring 26 and the limiting cylinder 19 are connected by a second spring member 25.

[0035] Further, a snap ring 20 is embedded on one side of the inner wall of the second chamber 29. The snap ring 20 protrudes from the inner wall of the second chamber 29. In the natural state, the connecting plate 13 extends into the second chamber 29, and the connecting plate 13 is limited by the snap ring 20; A plurality of arc-shaped card slots 27 are vertically formed on one side of the connecting plate 13 facing the snap ring 20. The distance between each card slot 27 is the same, and the card slot 27 is clamped with the snap ring 20; Different clamping positions between the card slot 27 and the snap ring 20 correspond to different outer diameter sizes of the overall roller skeleton.

[0036] Among them, the top side of the card slot 27 is set as a horizontal section to ensure the clamping stability with the snap ring 20, and the bottom side of the card slot 27 is provided with a chamfer to facilitate the upward movement and reset of the connecting plate 13.

[0037] Refer to Figure 12-13 、 Figure 10 , a slot 35 is opened inside the limiting cylinder 19 to connect the intake pipe 16. An air passage one 33 and an air passage two 331 are opened in the middle of the intake pipe 16, and an air passage three 34 and an air passage four 341 are opened in the middle of the limiting cylinder 19. The air passage one 33 is correspondingly communicated with the air passage three 34, and the air passage two 331 is correspondingly communicated with the air passage four 341.

[0038] Further, a through hole is formed on one side of the inner wall of the energy storage cover 8 for assembling 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 to the energy storage cover 8 through a pair of convex columns, and a third spring member 30 is connected between the dynamic opening and closing cover 24 and the energy storage cover 8. When the dynamic opening and closing cover 24 moves, the third spring member 30 deforms.

[0039] In the natural state, the air passage three 34 arranged on one side of the limiting cylinder 19 is in extrusion fit with the dynamic opening and closing cover 24 to block the air passage three 34.

[0040] Refer to Figure 14 , the tensioning roller 5 is limited and assembled on the installation guide rail 7 through the installation block 72, and the same pressing springs 71 are arranged on both sides of the installation block 72. The other ends of the pressing springs 71 are connected to the installation guide rail 7.

[0041] In this embodiment, the machine body 1 introduces the sludge to be processed through the feed port 101 and discharges the sludge to a place in the gravity dewatering area 102, and performs natural gravity dewatering through the first filter press belt 103. Then, the machine body 1 introduces the sludge between the first filter press belt 103 and the second filter press belt 104. The sludge passes through the roller gaps in sequence and is gradually fed into the low-pressure squeezing roller 2. Under the combined action of the shearing force and the squeezing force between the roller body and the belt body, the water is squeezed out.

[0042] During this process, the roller body of the low-pressure squeezing roller 2 has a larger diameter, and the arc lengths of the first filter press belt 103 and the second filter press belt 104 in contact with its surface are longer. The pressure is lower and dispersed. Therefore, it can effectively perform preliminary squeezing on the water in the sludge. The squeezing pressure in the stage of the low-pressure squeezing roller 2 is relatively low, which helps to further remove the free water in the sludge and gradually solidify the sludge, preparing for the subsequent high-pressure squeezing.

[0043] With the continuous conveying of the first conveying roller 105 and the second conveying roller 106, the sludge after low-pressure dewatering enters the first dynamic adjustment squeezing roller, and specifically contacts the roller body frame one 4 and the roller body frame two 41 for squeezing and dewatering; The sludge pressure directly acts on the roller body frame one 4 and the roller body frame two 41, and applies a force towards the center direction of the installation roller 10 to the frame body. The roller body frame one 4 and the roller body frame two 41 move downward through the connecting plate 13; A snap ring 20 for limiting the movement of the connecting plate 13 is arranged inside the installation roller 10. The snap ring 20 is engaged with the card slot 27 formed inside the connecting plate 13 to restrict the movement of the connecting plate 13. And due to the downward force, when the force (sludge pressure) is large enough, the connecting plate 13 will forcibly break through the snap ring 20 and move downward, causing the snap ring 20 to be engaged in another adjacent card slot 27. At this time, the position of the connecting plate 13 drops; At this time, due to the lowering of the position of the connecting plate 13, the roller body skeleton one 4 and the roller body skeleton two 41 move towards each other (contract), and the outer diameter of the overall cylindrical skeleton formed by connecting the roller body skeleton one 4 and the roller body skeleton two 41 decreases. The contact arc length between the filter belt and the surfaces of the roller body skeleton one 4 and the roller body skeleton two 41 decreases, and the local pressure increases, thereby increasing the dehydration pressure.

[0044] Synchronously, the connecting plate 13 moves downward synchronously with the rack 18. The rack 18 is engaged with the transmission gear 17 to achieve synchronous movement. Then, the connecting plate 13 synchronously pushes the sliding ring 26 provided on the pipe wall of the air inlet pipe 16 through the connecting rod 23 to move; The sliding ring 26 is pushed by the connecting rod 23 and moves towards the energy storage cover 8. At the same time, the sliding ring 26 pushes the limiting cylinder 19 through the spring member two 25, and the limiting cylinder 19 presses the dynamic opening and closing cover 24, causing the dynamic opening and closing cover 24 to be stretched through the spring member three 30 to stably cover the air passage three 34 above the limiting cylinder 19, thereby blocking the gas flow in the air passage one 33; The expansion airbag 12 deforms under the downward pressure, causing the internal compressed gas to escape through the air inlet pipe 16 into the energy storage cover 8 and accumulate in the energy storage cover 8 to generate a corresponding air pressure, and the air pressure compresses the rubber diaphragm 21 and the spring member one 22 provided in the energy storage cover 8; Due to the setting of the one-way rotary valve plate one 31, the gas cannot escape back into the expansion airbag 12 through the air passage four 341 and the air passage two 331.

[0045] At this time, the roller body skeleton one 4 and the roller body skeleton two 41 dynamically adjust the outer diameter of their cylinder bodies according to the sludge pressure at the corresponding positions to achieve the effect of stable squeezing and dehydration. At this time, the sludge pressure at the corresponding process position tends to be constant, and the outer diameter of the roller body skeleton no longer changes. Under various acting forces, the air pressure in the expansion airbag 12 and the energy storage cover 8 remains stable, causing the connecting plate 13 to be stably supported.

[0046] More specifically, there are multiple groups of dynamically adjustable pressing rollers. During the continuous transportation of sludge, the dynamically adjustable pressing rollers at different process positions bear different sludge pressures. Due to the different sludge properties (its internal moisture, particles, solids), the dynamically adjustable pressing rollers in the previous process will preferentially work with a skeleton diameter that is the same as or slightly smaller than that of the low-pressure pressing roller 2, and thus can efficiently and stably squeeze the sludge moisture sufficiently (since the sludge has a large water content in the early stage, the pressure applied is low and dispersed), and accurately apply the optimal pressure.

[0047] Then, the dynamically adjustable pressing rollers in the subsequent process will concentrate and squeeze the dehydrated solid sludge with a smaller diameter. As the process progresses further, that is, the dynamically adjustable pressing rollers closer to the high-pressure pressing roller 3 will squeeze and dehydrate in a form with a smaller diameter closer to the diameter of the high-pressure pressing roller 3 to relieve the operating pressure of the high-pressure pressing roller 3.

[0048] In contrast, due to the different sludge properties (including internal moisture, particles, and solids), during the actual application of the dynamic adjustment pressing roller in the previous process, its diameter does not operate in a stable and gradually decreasing manner. When the pressure of the dehydrated sludge in the previous process fails to reach the displacement trigger threshold of the connecting plate 13 in the subsequent process (i.e., the restraining force generated by the extrusion of the snap ring 20 and the card slot 27), the subsequent process will operate with an unchanged diameter.

[0049] For sludge with a relatively high water content, the low-pressure pressing roller 2 and the dynamic adjustment pressing roller have similar diameters, increasing the pressing 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 diameters of the front pressing rollers (the low-pressure pressing roller 2 and the dynamic adjustment pressing roller) are larger to evenly squeeze the water. Subsequently, the rollers in the subsequent process perform secondary rolling on the sludge after squeezing out water. At this time, due to the lack of water, the overall structure (particles, viscous substances, solids) inside the sludge coagulates together, making it harder as a whole, and the contact pressure with the roller surface increases. At this time, the diameter of the roller body framework correspondingly decreases to provide higher pressure and shear force.

[0050] Among them, during the actual application process, when the sludge pressure on the surfaces of the roller body framework one 4 and the roller body framework two 41 disappears or decreases, the spring piece one 22 and the spring piece two 25 reset and rebound, the expansion airbag 12 deforms, and the top pressure force of the limiting cylinder 19 by the sliding ring 26 decreases, causing it to reset and move. At this time, the air passage three 34 on the upper part of the limiting cylinder 19 no longer contacts the dynamic opening and closing cover 24, and the compressed gas re-enters the expansion airbag 12 from the air passage three 34 and the air passage one 33. A one-way rotating valve plate two 32 is provided at the passage of the air passage one 33, and a one-way rotating valve plate one 31 is provided at the passage opening of the air passage two 331. The one-way rotating valve plate two 32 is configured to deflect only outward through the setting of a torsion spring member to prevent the gas in the expansion airbag 12 from escaping to the energy storage cover 8 through the air passage one 33. The one-way rotating valve plate one 31 is configured to deflect only inward through the setting of a torsion spring member to prevent the gas in the energy storage cover 8 from escaping to the expansion airbag 12 through the air passage two 331 and the air passage four 341.

[0051] Among them, it should be noted that the machine body 1 is specifically a belt filter press. Among them, during the actual application process, the adjacent roller body framework one 4 and the roller body framework two 41 are configured to move relative to each other through the setting of 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, thereby realizing the increase or decrease of the diameter of the cylinder framework. Under the action of the torsion spring 14, each set of roller body frameworks one 4 and roller body frameworks two 41 generate acting forces deflecting outward, which ensures that the framework body is always in an expanded and saturated cylindrical shape.

[0052] Among them, during the actual application process, the expansion airbag 12 is filled with compressed gas and is in an expanded state under the natural state, so as to effectively support the connecting plate 13.

[0053] Among them, during the actual application process, a dynamic seal is provided at the connection between the limit cylinder 19 and the energy storage cover 8 to ensure the sealing performance. Setting a seal to ensure the normal operation of the device is a conventional setting in this technical field and will not be explained further.

[0054] Among them, during the actual application process, the transmission gears 17 are arranged in a group of two, respectively corresponding to a plurality of connecting plates 13 arranged on the transmission mounting roller 10. As one transmission gear 17 rotates, the adjacent racks 18 and transmission gears 17 are synchronously driven, thereby realizing the synchronous linkage movement of the connecting plates 13.

[0055] Among them, during the actual application process, when the connecting plate 13 is pressed down, the expansion airbag 12 is simultaneously squeezed, and the connecting plate 13 is connected to the outer wall of the expansion airbag 12.

[0056] Among them, during the actual application process, during the process of the roller body frameworks one 4 and roller body frameworks two 41 adjusting towards each other, the overall framework diameter will change to a certain extent, causing different tension values for the filter press belts one 103 and filter press belts two 104. At this time, the position of the tensioning roller 5 can be dynamically adjusted through the installation guide rail 7 and the top spring 71 to achieve stable tensioning.

[0057] Among them, during the actual application process, the driving motor 107 drives the conveyor roller one 105 and the conveyor roller two 106 to rotate, and the conveyor roller one 105 and the conveyor roller two 106 then drive the filter press belt two 104 and the filter press belt one 103 to move and convey.

[0058] Gravity dewatering area 102, the sludge is discharged from the feed port 101 onto the filter press belt one 103 arranged in the gravity dewatering area 102, and the water in the sludge is naturally discharged through natural gravity. The specific details about the gravity dewatering area 102 (dewatering principle) not explained in detail above are common knowledge for those skilled in the art and will not be explained further.

[0059] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent replacements or changes, and should be covered within the protection scope of the present invention.

Claims

1. A sewage sludge reduction and dehydration device, comprising a body (1), characterized in that: The middle part of the machine body (1) is provided with a plurality of low-pressure pressing rollers (2), a plurality of dynamically adjustable pressing rollers, a plurality of high-pressure pressing rollers (3), a filter press belt 1 (103) and a filter press belt 2 (104); the filter press belt 1 (103) is wound around each low-pressure pressing roller (2), each dynamically adjustable pressing roller and each high-pressure pressing roller (3) in sequence, and the filter press belt 2 (104) is wound around the filter press belt 2 (104); The dynamically adjustable pressing roll comprises a mounting roll (10) and a plurality of roll body frames one (4) and two (41) of roll body; the outer side of the mounting roll (10) is mounted with a plurality of roll body frames one (4) and two (41) of roll body via a plurality of connecting plates (13); adjacent roll body frames one (4) and two (41) of roll body are connected to each other to form a cylinder frame; Energy storage covers (8) are provided at both ends of the installation roller (10), and an expansion air bag (12) is provided in the middle to connect the support connecting plate (13). The energy storage cover (8) and the expansion air bag (12) are connected via an air intake pipe (16). A slip ring (26) is slidably mounted on the air intake pipe (16). The slip ring (26) is connected to each connecting plate (13) via a connecting rod (23). Each connecting plate (13) is driven via a linkage gear set. When the slip ring (26) moves, the slip ring (26) drives the limit cylinder (19) to move via a second spring member (25) to control the switching of the opening and closing states of the internal air passage of the limit cylinder (19). A snap ring (20) is embedded in one side of the inner wall of the installation roller (10), and the snap ring (20) protrudes from the inner wall of the second chamber (29). In a natural state, the connecting plate (13) extends into the installation roller (10) and is limited by the snap groove (27) and the snap ring (20).

2. A sewage sludge reduction and dehydration device according to claim 1, characterized in that: A gravity dehydration zone (102) is provided at the upper part of the machine body (1), and a feed inlet (101) is provided at the upper part of the gravity dehydration zone (102) for introducing materials.

3. The sewage sludge reduction and dehydration device according to claim 1, characterized in that: A conveying roller 1 (105) and a conveying roller 2 (106) are installed on one side of the machine body (1); the conveying roller 1 (105) and the conveying roller 2 (106) are driven to rotate by a driving motor (107); the conveying roller 1 (105) is used to drive the filter press belt 2 (104) to move, and the conveying roller 2 (106) is used to drive the filter press belt 1 (103) to move.

4. The sewage sludge reduction and dehydration device according to claim 1, characterized in that: The roller frame 1 (4) and the roller frame 2 (41) are rotatably assembled on the upper part of the connecting plate (13) via a connecting pin (43), and a torsion spring (14) is installed at the rotation connection between the connecting pin (43) and the connecting plate (13). The roller frame 1 (4), the roller frame 2 (41) and the connecting plate (13) are connected to each other to form a "T"-shaped whole; A limiting groove (15) is provided on one side of the roller body frame 1 (4), and an extension frame (42) is provided on one side of the roller body frame 2 (41). The extension frame (42) and the limiting groove (15) are connected to each other.

5. The sewage sludge reduction and dehydration device according to claim 1, characterized in that: The filter press belt 1 (103) is wound around the conveying roller 2 (106), the low-pressure pressing roller (2), the dynamic adjustment pressing roller, the high-pressure pressing roller (3), and the tensioning roller (5), thereby forming a closed loop; The filter press belt 2 (104) is wound around the conveying roller 1 (105), the low-pressure pressing roller (2), the dynamic adjustment pressing roller, the high-pressure pressing roller (3), and the conveying roller 3 (6), thereby forming a closed loop; The tensioning roller (5) is limitedly mounted on the mounting rail (7) via a mounting block (72); the mounting rail (7) is mounted in the machine body (1); and tensioning springs (71) are provided on both sides of the mounting block (72); the other end of the tensioning spring (71) is connected to the mounting rail (7).

6. The sewage sludge reduction and dehydration device according to claim 1, characterized in that: Both ends of the mounting roller (10) are connected to the bearing seat (9).

7. The sewage sludge reduction and dehydration device according to claim 1, characterized in that: Each of the linkage gear sets includes a pair of mutually meshing transmission gears (17), and a gap is provided between each linkage gear set to assemble the connecting plate (13), a rack (18) provided at the bottom of the connecting plate (13) meshes 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 a second chamber (29) provided inside the installation roller (10), and a first chamber (28) is provided on a side away from the second chamber (29), and an expansion airbag (12) is installed in the first chamber (28).

8. The sewage sludge reduction and dehydration device according to claim 1, characterized in that: The outer wall of the installation roller (10) is provided with a plurality of connection seats (11), and the connection seats (11) are limitedly equipped with connection plates (13).

9. The sewage sludge reduction and dehydration device according to claim 1, characterized in that: A rubber diaphragm (21) is provided on one side of the inner wall of the energy storage cover (8), 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 spring member 1 (22) is provided in the cavity; A through hole is provided on one side of the inner wall of the energy storage cover (8) for assembling 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 inner wall of the energy storage cover (8) via a pair of protruding columns, and a spring member 3 (30) is provided between the dynamic opening and closing cover (24) and the energy storage cover (8). When the dynamic opening and closing cover (24) moves, the spring member 3 (30) is deformed, and in a natural state, an air passage 3 (34) provided on one side of the limiting cylinder (19) is pressed, contacted and connected with the dynamic opening and closing cover (24), thereby blocking the air passage 3 (34).

10. The sewage sludge reduction and dehydration device according to claim 1, characterized in that: The outer wall of the air inlet pipe (16) is position-limitedly connected to the slip ring (26) via a sliding groove (161); one end of the slip ring (26) is position-limitedly installed inside the limit cylinder (19) via a slot (35); and the limit cylinder (19) and the slip ring (26) are connected via a second spring member (25); The air inlet pipe (16) is provided with an air channel 1 (33) and an air channel 2 (331) in the middle, and the limiting cylinder (19) is provided with an air channel 3 (34) and an air channel 4 (341) in the middle, the air channel 1 (33) is connected to the air channel 3 (34), and the air channel 2 (331) is connected to the air channel 4 (341); A one-way rotating valve plate 2 (32) is correspondingly installed at the middle of one end of the air channel 1 (33), and a one-way rotating valve plate 1 (31) is correspondingly installed at the middle of one end of the air channel 2 (331).

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