A filter-press dewatering device for sludge treatment

Abstract

The application discloses a pressure filtration dewatering device for sludge treatment and relates to the technical field of sludge treatment. The pressure filtration dewatering device for sludge treatment comprises a fixing assembly, a filter plate assembly and a force applying assembly. The fixing assembly comprises two supporting tables arranged side by side along the left-right direction. The filter plate assembly comprises a first filter plate and a second filter plate arranged side by side along the front-back direction, the left and right sides of the first filter plate and the left and right sides of the second filter plate are all provided with brackets, the first filter plate and the second filter plate are both lapped on the two supporting tables through the brackets and are located between the two supporting tables. The force applying assembly comprises a pushing mechanism and two groups of lifting mechanisms. The pushing mechanism is arranged on the fixing assembly and is located on the side of the first filter plate away from the second filter plate, and can push the first filter plate to contact the second filter plate. The two groups of lifting mechanisms are respectively and correspondingly arranged on the outer side walls of the two supporting tables and are connected with the pushing mechanism, and can drive the first filter plate and the second filter plate to separate under the action of the pushing mechanism.

Description

Technical Field

[0001] This invention relates to the field of sludge treatment technology, specifically a sludge dewatering device for sludge treatment. Background Technology

[0002] In sludge treatment and many industrial solid-liquid separation fields, filter presses are widely used key equipment. Their basic working principle is to use one or more sets of filter plates to form a closed chamber. Under external pressure, the liquid portion of the sludge-water mixture is forced through the filter cloth or membrane and discharged, thus achieving the separation of sludge cake and water.

[0003] Existing plate and frame filter presses or diaphragm filter presses typically consist of multiple filter plates arranged side by side. During the filtration process, a hydraulic system closes and locks the filter plate assembly, forming multiple independent filtration chambers. After the filtration process is completed, the hydraulic system needs to be operated to retract the filter plate assembly, and multiple filter plates need to be manually pulled apart so that the sludge cake adhering to the filter plates can be removed manually or with the aid of a vibrating device.

[0004] It is evident that existing filter press devices require manual assistance to pull apart multiple pressed filter plates one by one in order to expose the mud cake and unload the material. This results in problems such as long processing time, poor overall continuity of operation, and low efficiency.

[0005] To address the above problems, the present invention provides a filter press dewatering device for sludge treatment, thereby solving the aforementioned issues. Summary of the Invention

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A sludge dewatering device for filtration includes a fixing assembly, a filter plate assembly, and a force-applying assembly. The fixing assembly includes two support platforms arranged side-by-side in a left-right direction. The filter plate assembly includes a first filter plate and a second filter plate arranged side-by-side in a front-back direction. Supports are provided on both sides of the first and second filter plates, and the first and second filter plates are connected to the two support platforms via these supports, located between the two support platforms. The force-applying assembly includes a pushing mechanism and two sets of lifting mechanisms. The pushing mechanism is located on the fixing assembly on the side of the first filter plate facing away from the second filter plate, and is capable of pushing the first filter plate into contact with the second filter plate. The two sets of lifting mechanisms are respectively and correspondingly arranged on the outer walls of the two support platforms and connected to the pushing mechanism, capable of separating the first and second filter plates under the action of the pushing mechanism.

[0008] Preferably, each lifting mechanism includes a rack, a gear, a rotating shaft, and a cam. The rack is slidably mounted on the outer wall of the support platform and connected to the pushing mechanism via a connecting rod; the rotating shaft is rotatably connected to the support platform; the gear is interference-fitted to the end of the rotating shaft and meshes with the rack; the end of the rotating shaft is also provided with a cam, and the bracket of the first filter plate sidewall is located on the rotation path of the cam. When the cam rotates, it can abut against the bottom of the bracket of the first filter plate sidewall, causing the first filter plate to separate from the second filter plate.

[0009] Preferably, a guide groove is provided on the side wall of the support platform, a slider is slidably provided in the guide groove, and a rack is fixed on the slider.

[0010] Preferably, a pawl is fitted onto the inner wall of the cam, and a ratchet is fixed on the outer peripheral wall of the shaft. The pawl and the ratchet engage so that the cam is located at the end of the shaft.

[0011] Preferably, the distal end face of the cam is configured as a toothed surface, and a toothed groove is opened at the bottom of the bracket on the side wall of the first filter plate to cooperate with the toothed surface. When the cam abuts against the bracket on the side wall of the first filter plate, the toothed surface and the toothed groove mesh.

[0012] Preferably, the pushing mechanism includes a hydraulic cylinder and a push plate. The push plate is movably disposed on the side of the first filter plate facing away from the second filter plate, and the hydraulic cylinder is connected to a mounting bracket on the side of the push plate facing away from the first filter plate. Before filter press dewatering, the hydraulic cylinder extends and pushes the push plate, which pushes the first filter plate closer to and in contact with the second filter plate to form a sludge-accommodating cavity between the first and second filter plates.

[0013] Preferably, both the first and second filter plates have a connecting hole in the center for guiding sludge, and the connecting hole is connected to the external sludge tank by a feeding pipe.

[0014] Preferably, the system further includes a flow supply mechanism, which comprises a hot water tank, a first inlet pipe, a second inlet pipe, a first guide cavity, a second guide cavity, a first drain pipe, a second drain pipe, a first pump, and a second pump. A first guide cavity is formed within a first filter plate, and a second guide cavity is formed within a second filter plate. The drain end of the hot water tank is connected to the first guide cavity via the first inlet pipe and to the second guide cavity via the second inlet pipe; the inlet end of the hot water tank is connected to the first guide cavity via the first drain pipe and to the second guide cavity via the second drain pipe; a first pump is installed on the first inlet pipe, and a second pump is installed on the second inlet pipe.

[0015] Preferably, both the surface of the first filter plate and the surface of the second filter plate are evenly provided with a plurality of protrusions, and the plurality of protrusions form a guide groove. Air inlets and outlets are provided at the edges of both the first and second filter plates, and the air inlets, guide grooves, and outlets form a connected body; the air inlets are connected to an external air pump via an air inlet pipe, and the outlets are connected to an external sewage tank via a sewage outlet pipe.

[0016] Preferably, N filter plate assemblies are provided, arranged side by side in the front-to-back direction, with the first and second filter plates alternating between adjacent assemblies, where N is a positive integer greater than 1. Each lifting mechanism is provided with N gears, N rotating shafts, and N cams, with the N rotating shafts arranged side by side in the front-to-back direction, and the N gears and N cams correspondingly mounted on the N rotating shafts.

[0017] There are N first inlet pipes, N second inlet pipes, N first drain pipes, and N second drain pipes. The first inlet pipes and N first drain pipes are connected to the first guide cavity in a one-to-one correspondence. The second inlet pipes and N second drain pipes are connected to the second guide cavity in a one-to-one correspondence.

[0018] Compared with the prior art, the present invention provides a filter press dewatering device for sludge treatment, which has the following beneficial effects:

[0019] 1. When the pushing mechanism applies force to the lifting mechanism, the bracket and the first filter plate move forward in an arc along with the cam, separating the first filter plate from the second filter plate. This achieves automatic separation of the first and second filter plates without human intervention, solving the problem of long manual handling time, shortening the auxiliary time for unloading and preparing for the next round of work after filtration, reducing the time for manual intervention during equipment idling, making the entire filtration process more continuous, and further improving the overall operating efficiency.

[0020] 2. By using the lifting mechanism, the mud cake adhering to the first filter plate will be vibrated and fall downwards the instant the bracket leaves the support platform and falls back onto the support platform, thus achieving automatic separation of the mud cake adhering to the first filter plate. Furthermore, when the bracket leaves the support platform, the first filter plate will exert an upward shearing force and a forward pulling force on the mud cake, forcing the mud cake adhering to the second filter plate to completely detach. Therefore, through the arc movement of the first filter plate, the mud cake adhering to the first and second filter plates will automatically fall off without the need for manual removal, further reducing the time of manual intervention during equipment idling and waiting. Attached Figure Description

[0021] Figure 1 This is a front isometric view of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the rear equiaxial side of the overall structure of the present invention;

[0023] Figure 3 This is a schematic diagram showing the position distribution of the lifting mechanism of the present invention;

[0024] Figure 4 For the present invention Figure 3 Enlarged schematic diagram of the structure at point A in the middle;

[0025] Figure 5 For the present invention Figure 4 Enlarged schematic diagram of the structure at point B;

[0026] Figure 6 This is a schematic diagram of the cross-sectional structure of the cam of the present invention;

[0027] Figure 7 This is a schematic diagram of the filter plate assembly structure of the present invention;

[0028] Figure 8 This is a schematic diagram of the first filter plate structure of the present invention;

[0029] Figure 9 This is a schematic diagram of the second filter plate structure of the present invention.

[0030] In the diagram: 11, bracket; 12, support platform; DC, guide groove; 13, limiting plate; 21, first filter plate; Q1, first guide cavity; 22, second filter plate; Q2, second guide cavity; TJ, bracket; K1, connecting hole; K2, air inlet; K3, drain hole; DL, guide groove; TT, protrusion; FL, diverter pipe; LM, filter membrane; 31, pushing mechanism; 311, hydraulic cylinder; 312, push plate; 32, connecting rod; 33, lifting mechanism; 331, rack; 332, gear; 333, rotating shaft; JL, ratchet; JZ, pawl; 334, cam; JS1, first water inlet pipe; JS2, second water inlet pipe; PS1, first drain pipe; PS2, second drain pipe; B1, first pump; B2, second pump; JQ, air inlet pipe; PW, sewage pipe; QB, air pump. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims and drawings of this application are intended to cover non-exclusive inclusion.

[0033] The directional terms appearing in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of this application. For example, in the description of this application, the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0034] Furthermore, the terms "first," "second," etc., in the specification and claims of this application or in the aforementioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0035] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, "connection" or "joining" in mechanical structures can refer to a physical connection, such as a fixed connection, for example, a connection fixed by fasteners, such as a connection fixed by screws, bolts, or other fasteners; a physical connection can also be a detachable connection, such as a snap-fit ​​or interlocking connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0036] Reference Figures 1-9 The present invention provides a technical solution:

[0037] This application provides a sludge dewatering device for filtration, which includes a fixing assembly, a filter plate assembly, and a force-applying assembly. The fixing assembly includes two support platforms 12 arranged side-by-side in a left-right direction. The filter plate assembly includes a first filter plate 21 and a second filter plate 22 arranged side-by-side in a front-back direction. Supports TJ are provided on both sides of the first filter plate 21 and the second filter plate 22. The first filter plate 21 and the second filter plate 22 are connected to the two support platforms 12 via the supports TJ and are located between the two support platforms 12. The force-applying assembly includes a pushing mechanism 31 and two sets of lifting mechanisms 33. The pushing mechanism 31 is located on the fixing assembly on the side of the first filter plate 21 facing away from the second filter plate 22, and can push the first filter plate 21 into contact with the second filter plate 22. The two sets of lifting mechanisms 33 are respectively and correspondingly arranged on the outer walls of the two support platforms 12 and are connected to the pushing mechanism 31, enabling the first filter plate 21 to separate from the second filter plate 22 under the action of the pushing mechanism 31.

[0038] Based on the above scheme, before filtration, the pushing mechanism 31 applies a rearward force to the first filter plate 21. After the first filter plate 21 is subjected to force, the brackets TJ on both sides of the first filter plate 21 move on the support platform 12 toward the brackets TJ on both sides of the second filter plate 22. The first filter plate 21 gradually moves toward the second filter plate 22 to approach and contact the second filter plate 22. After the first filter plate 21 and the second filter plate 22 come into contact, a receiving cavity for sludge is formed between them. Then, the sludge to be filtered is filled into the receiving cavity.

[0039] After pressing and filtration, the pushing mechanism 31 applies a forward force to the lifting mechanism 33. Based on the force applied by the pushing mechanism 31, the lifting mechanism 33 drives the brackets TJ on both sides of the first filter plate 21 to move away from the brackets TJ on both sides of the second filter plate 22 on the support platform 12. The first filter plate 21 moves away from the second filter plate 22 to separate from the second filter plate 22, so that the pressed and filtered mud cake can fall off.

[0040] As can be seen, the separation of the first filter plate 21 and the second filter plate 22 after filtration can be achieved entirely by the pushing mechanism 31 and the lifting mechanism 33, without manual intervention. Therefore, the setting of the pushing mechanism 31 and the lifting mechanism 33 can solve the problem of long manual handling time, and can significantly shorten the auxiliary time for unloading and preparing for the next round of work after filtration, reduce the manual intervention time of equipment idling and waiting, make the entire filtration process more continuous, and further improve the overall operating efficiency.

[0041] In the above scheme, the fixing component may further include a bracket 11 and a limiting plate 13. Supports 12 are provided on the left and right sides of the bracket 11. The limiting plate 13 can be fixed to the rear side of the bracket 11, that is, the limiting plate 13 is located on the side of the second filter plate 22 facing away from the first filter plate 21. In this way, the limiting plate 13 can limit the second filter plate 22, facilitating contact between the first filter plate 21 and the second filter plate 22, and preventing the pushing mechanism 31 from pushing the first filter plate 21 and the second filter plate 22 to move backward together continuously.

[0042] The first filter plate 21 and the second filter plate 22 can be configured as plates with the same size and structural shape, so that when the first filter plate 21 and the second filter plate 22 come into contact, a sealed receiving cavity can be formed inside, preventing the sludge from being squeezed out during the filter pressing process. The bracket TJ can be configured as a triangular structure, with one straight side of the bracket TJ connected to the first filter plate 21 or the second filter plate 22, and the other straight side of the bracket TJ overlapping the support platform 12 and partially exposed, so as to facilitate the movement of the first filter plate 21 by the force of the lifting mechanism 33.

[0043] Filter membranes LM can be installed on the rear side of the first filter plate 21 and the front side of the second filter plate 22. After the first filter plate 21 and the second filter plate 22 come into contact, sludge can be filled between the two filter membranes LM. Under the action of the impact pressure, water in the sludge passes through the gap between the two filter membranes LM, and the sludge cake will remain between the two filter membranes LM.

[0044] In some embodiments, each lifting mechanism 33 includes a rack 331, a gear 332, a rotating shaft 333, and a cam 334. The rack 331 is slidably disposed on the outer wall of the support platform 12 and connected to the pushing mechanism 31 via a connecting rod 32; the rotating shaft 333 is rotatably connected to the support platform 12; the gear 332 is interference-fitted onto the rotating shaft 333 and meshes with the rack 331; the end of the rotating shaft 333 is provided with a cam 334, and the bracket TJ of the side wall of the first filter plate 21 is located on the rotation path of the cam 334. When the cam 334 rotates, it can abut against the bottom of the bracket TJ of the side wall of the first filter plate 21, thereby causing the first filter plate 21 to separate from the second filter plate 22.

[0045] In this embodiment, when the pushing mechanism 31 applies force to the lifting mechanism 33, the pushing mechanism 31 applies a forward force to the connecting rod 32. The connecting rod 32 drives the rack 331 to move forward. During the movement of the rack 331, the gear 332 rotates clockwise. When the gear 332 rotates clockwise, the rotating shaft 333 rotates clockwise. When the rotating shaft 333 rotates clockwise, the cam 334 rotates clockwise. When the distal end of the cam 334 rotates to the top, it supports the brackets TJ on the left and right sides of the first filter plate 21. The brackets TJ and the first filter plate 21 move forward in an arc with the cam 334, separating the first filter plate 21 from the second filter plate 22.

[0046] As can be seen, under the transmission method of this embodiment, the first filter plate 21 and the second filter plate 22 can be automatically separated without human intervention, which solves the problem of long manual handling time, shortens the auxiliary time for unloading and preparing for the next round of work after the filter press is completed, reduces the manual intervention time for equipment to idle and wait, makes the continuity of the entire filter press process stronger, and further improves the overall operating efficiency.

[0047] In the above scheme, it is worth emphasizing that, firstly, at the moment when the bracket TJ leaves the support platform 12 and then falls back onto the support platform 12, the mud cake adhering to the first filter plate 21 will be vibrated and fall downwards, realizing the automatic separation of the mud cake adhering to the first filter plate 21. Secondly, when the bracket TJ leaves the support platform 12, the first filter plate 21 will exert an upward shearing force and a forward pulling force on the mud cake, forcing the mud cake adhering to the second filter plate 22 to completely detach. Therefore, through the arc movement of the first filter plate 21, the mud cake adhering to the first filter plate 21 and the second filter plate 22 will automatically fall off without the need for manual removal, further reducing the time of manual intervention during equipment idling and waiting.

[0048] One point to note here is that when the first filter plate 21 separates from the second filter plate 22, the weight of the second filter plate 22 is much greater than the deformation resistance of the mud cake. In other words, when the first filter plate 21 moves forward in an arc, the mud cake will not drive the second filter plate 22 to move forward, ensuring that the first filter plate 21 and the second filter plate 22 can separate.

[0049] In some alternative configurations, a guide groove DC is provided on the side wall of the support platform 12, and a slider (not shown in the figure) is slidably provided in the guide groove DC, with a rack 331 fixed on the slider.

[0050] Based on the above scheme, the longitudinal section of the slider is configured as a T-shape, and the guide groove DC is configured as a T-shaped groove that matches the slider, so that the guide groove DC can limit the slider and prevent the slider from detaching from the rack 331 from the support table 12.

[0051] In some alternative configurations, a pawl JZ is fitted onto the inner wall of the cam 334, and a ratchet JL is fixed on the outer peripheral wall of the shaft 333. The pawl JZ meshes with the ratchet JL so that the cam 334 is located at the end of the shaft 333.

[0052] When the push mechanism 31 drives the rack 331 to move backward through the connecting rod 32, the rack 331 will drive the gear 332 to rotate counterclockwise. However, since the ratchet JL and the pawl JZ are not locked, the cam 334 remains stationary under its own weight. That is, the cam 334 slips on the rotating shaft 333. Therefore, the process of the first filter plate 21 and the second filter plate 22 closing again is a backward linear motion, which reduces the vibration frequency of the bracket TJ and the support table 12 and ensures the installation stability of the bracket TJ on the first filter plate 21.

[0053] In some alternative configurations, the distal end face of the cam 334 is configured as a toothed surface, and a toothed groove is formed at the bottom of the bracket TJ on the side wall of the first filter plate 21 to mate with the toothed surface. When the cam 334 abuts against the bracket TJ on the side wall of the first filter plate 21, the toothed surface and the toothed groove mesh.

[0054] Based on the above scheme, when the tooth surface at the distal end of the cam 334 rotates upward, it can cooperate with the tooth groove of the bracket TJ, thereby avoiding the slippage of the cam 334 relative to the bracket TJ.

[0055] In some alternative embodiments, the actuating mechanism 31 includes a hydraulic cylinder 311 and a pusher plate 312. The pusher plate 312 is movably disposed on the side of the first filter plate 21 facing away from the second filter plate 22, and the hydraulic cylinder 311 is connected to a mounting bracket on the side of the pusher plate 312 facing away from the first filter plate 21. Before filter press dewatering, the hydraulic cylinder 311 extends and pushes the pusher plate 312, which pushes the first filter plate 21 closer to and in contact with the second filter plate 22 to form a sludge-accommodating cavity between the first filter plate 21 and the second filter plate 22.

[0056] The hydraulic cylinder 311 controls the extension of its output end through an external control terminal. When the first filter plate 21 and the second filter plate 22 are closed for filtration, the control terminal controls the hydraulic cylinder 311 to drive the push plate 312 to move backward. When the first filter plate 21 and the second filter plate 22 are separated for unloading, the control terminal controls the hydraulic cylinder 311 to drive the push plate 312 to move forward.

[0057] In some alternative configurations, both the first filter plate 21 and the second filter plate 22 have a connecting hole K1 at their center for guiding sludge through them. The connecting hole K1 is connected to the external sludge tank via a feed pipe.

[0058] The external sludge tank can be equipped with a sludge pump, and the feed pipe can be equipped with a valve. The sludge filling process is as follows: open the sludge pump and valve to start filling the receiving cavity with sludge. When the receiving cavity is completely filled with sludge, close the sludge pump and valve to complete one sludge filling.

[0059] In some alternative embodiments, a sludge treatment filter press dewatering device further includes a flow supply mechanism, which includes a hot water tank, a first inlet pipe JS1, a second inlet pipe JS2, a first guide cavity Q1, a second guide cavity Q2, a first drain pipe PS1, a second drain pipe PS2, a first pump B1, and a second pump B2; the first filter plate 21 has a first guide cavity Q1, and the second filter plate 22 has a second guide cavity Q2; the drain end of the hot water tank is connected to the first guide cavity Q1 through the first inlet pipe JS1 and to the second guide cavity Q2 through the second inlet pipe JS2; the inlet end of the hot water tank is connected to the first guide cavity Q1 through the first drain pipe PS1 and to the second guide cavity Q2 through the second drain pipe PS2; the first pump B1 is installed on the first inlet pipe JS1, and the second pump B2 is installed on the second inlet pipe JS2.

[0060] Based on the above scheme, the first filter plate 21 is made of aluminum and the second filter plate 22 is made of hard rubber; or, the second filter plate 22 is made of hard rubber and the second filter plate 22 is made of aluminum.

[0061] During the filtration process, the first pump B1 and the second pump B2 are started simultaneously. Part of the hot water in the hot water tank enters the first guide chamber Q1 through the first inlet pipe JS1. After heat exchange in the first guide chamber Q1, the hot water flows back to the hot water tank through the first drain pipe PS1. The other part of the hot water enters the second guide chamber Q2 through the second inlet pipe JS2. After heat exchange in the second guide chamber Q2, the hot water flows back to the hot water tank through the second drain pipe PS2, thus realizing the recycling of hot water.

[0062] As is well known, aluminum has good thermal conductivity. Therefore, during the hot water introduction process, the aluminum plate can quickly transfer heat energy to the containment cavity, realizing the rapid evaporation of water in the sludge. The rigid rubber plate will expand when heated. Thus, the separation efficiency of sludge cake and water is improved through the dual effects of the aluminum plate conducting heat and evaporation and the rubber plate expanding when heated to increase the pressure in the containment cavity.

[0063] The first pump B1 can provide a pressure of 0.5-0.7 MPa in the first guide cavity Q1 of the aluminum plate, and the second pump B2 can provide a pressure of 1.5-1.6 MPa in the second guide cavity Q2 of the hard rubber plate. The reason is that the core function of the aluminum plate is heat transfer, and excessive pressure should be avoided to prevent the aluminum plate from bursting; while the core function of the hard rubber plate is thermal expansion capacity, and the second pump B2 with a higher pressure value can enable the hard rubber plate to meet certain expansion requirements.

[0064] In some alternative configurations, both the surface of the first filter plate 21 and the surface of the second filter plate 22 are evenly provided with a plurality of protrusions TT, and the plurality of protrusions TT form a guide channel DL. Air inlets K2 and outlets K3 are provided at the edges of both the first filter plate 21 and the second filter plate 22, and the air inlets K2, the guide channels DL, and the outlets K3 form a connected body. The air inlets K2 are connected to the external air pump QB via an air inlet pipe JQ, and the outlets K3 are connected to the external sewage tank via a sewage outlet pipe PW.

[0065] After the sludge enters the containment cavity, the air pump QB starts and fills the air inlet K2 with gas. The air pressure forces a portion of the water through the filter membrane LM and along the guide groove DL of the first filter plate 21 into the outlet K3. At the same time, the air pressure forces another portion of the water through the filter membrane LM and along the guide groove DL of the second filter plate 22 into the outlet K3. Finally, the water in the outlet K3 will enter the external sewage tank through the sewage pipe PW.

[0066] Based on the above scheme, a diversion pipe FL can be connected to the air inlet pipe JQ. The diversion pipe FL is connected to the first guide cavity Q1 and the second guide cavity Q2 respectively. A switching valve is provided at the connection between the air inlet pipe JQ and the diversion pipe FL. During sludge depressurization, the switching valve connects the air inlet pipe JQ to the air inlet hole K2. After one sludge depressurization is completed, the switching valve is adjusted to connect the air inlet pipe JQ to the diversion pipe FL. The airflow will enter the first guide cavity Q1 and the second guide cavity Q2. Under the action of low temperature wind, it can quickly exchange heat with the interior of the first guide cavity Q1 and the second guide cavity Q2, so that the first filter plate 21 and the second filter plate 22 can be cooled down quickly, and the first filter plate 21 and the second filter plate 22 can dissipate heat rapidly, further shortening the time of the depressurization working interval.

[0067] In some optional configurations, N filter plate assemblies are provided, arranged side by side in the front-to-back direction, with the first filter plate 21 and the second filter plate 22 alternating between adjacent filter plate assemblies, where N is a positive integer greater than 1; each lifting mechanism 33 is provided with N gears 332, N rotating shafts 333 and N cams 334, with the N rotating shafts 333 arranged side by side in the front-to-back direction, and the N gears 332 and N cams 334 correspondingly mounted on the N rotating shafts 333; N first inlet pipes JS1, second inlet pipes JS2, first drain pipes PS1 and second drain pipes PS2 are each provided, with the first inlet pipes JS1 and PS1 correspondingly connected to the first guide cavity Q1; the second inlet pipes JS2 and PS2 correspondingly connected to the second guide cavity Q2.

[0068] The separation process of N first filter plates 21 and N second filter plates 22 (in the form of...) Figures 4 to 5 (For example): Hydraulic cylinder 311 starts to drive push plate 312 to move forward. Push plate 312 drives rack 331 to move forward through connecting rod 32. Rack 331 meshes with N gears 332. Initially, N gears 332 rotate clockwise once. Gears 332 drive pawl JZ to rotate clockwise once through ratchet JL on shaft 333. Then, N cams 334 rotate synchronously once. During the rotation of each cam 334, the distal end of cam 334 will lift the bracket TJ on the upper left and move it forward a certain distance. That is, each second filter plate 22 moves forward in an arc synchronously, so that the last second filter plate 22 is the first to disengage from limit plate 13. Then rack 331 disengages from the last gear 332, push plate 312 continues to drive rack 331 to move forward, and rack 331 meshes with N-1 gears 332. Similarly, N-1 gears 332 rotate clockwise once first. Gears 332 will drive ratchet JL on shaft 333 to rotate clockwise once, and then N-1 cams 334 will rotate synchronously once. Under the meshing transmission of ratchet JL and ratchet JZ, N first filter plates 21 will move forward synchronously once in an arc trajectory. During this period, except for the last second filter plate 22, N-1 second filter plates 22 will move forward synchronously a distance. At this time, the last set of first filter plates 21 and second filter plates 22 will be separated. According to the above rules, when hydraulic cylinder 311 drives push plate 312 to continuously drive rack 331 forward, N first filter plates 21 and N second filter plates 22 will be automatically separated one by one, ensuring that there is desludge space on both sides of each first filter plate 21 and second filter plate 22, thereby replacing manual handling and improving the overall filter pressing efficiency.

[0069] The distance between two adjacent rotating shafts 333 along the front-back direction can be set to twice the distance between two adjacent first filter plates 21 and second filter plates 22. This allows the rear cam 334 to move the first filter plate 21 or the second filter plate 22 a certain distance before reaching the arc trajectory of the next cam 334. Therefore, on the one hand, it avoids the N first filter plates 21 and N second filter plates 22 from moving forward synchronously with the push plate 312, and on the other hand, it ensures that each first filter plate 21 and second filter plate 22 can be separated independently.

[0070] In this application, since the first filter plate 21 and the second filter plate 22 need to be moved, the pipes communicating with the first filter plate 21 and the second filter plate 22 can be flexible hoses.

[0071] Specifically, when sludge needs to be treated, the output end of the hydraulic cylinder 311 is first extended by the external control terminal to drive the pusher plate 312 to push N first filter plates 21 and N second filter plates 22 to a fully closed state. At the same time, the two racks 331 are pushed to mesh with the two gears 332 at the rear end. Then, feeding begins. After feeding is completed, the air pump QB, the first pump B1 and the second pump B2 are started to heat and drain the N first guide chambers Q1 and N second guide chambers Q2. After hot-press filtration is completed, the first pump B1 and the second pump B2 are turned off. Then, the switching valve is adjusted, and the output end of the hydraulic cylinder 311 is shortened by the external control terminal. The N first filter plates 21 and N second filter plates 22 are completely and automatically separated. Then, the N first filter plates 21 and N second filter plates 22 are rapidly cooled by the wind. After cooling is completed, the output end of the hydraulic cylinder 311 is extended again by the external control terminal, and the above process is repeated.

[0072] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A filter press dewatering device for sludge treatment, characterized in that: include: The fixing component includes two supports arranged side by side along the left-right direction; The filter plate assembly includes a first filter plate and a second filter plate arranged side by side in a front-to-back direction. The left and right sides of the first filter plate and the left and right sides of the second filter plate are provided with brackets. The first filter plate and the second filter plate are both connected to the two brackets through the brackets and are located between the two brackets. The force-applying component includes a pushing mechanism and two sets of lifting mechanisms; the pushing mechanism is disposed on the fixed component and located on the side of the first filter plate facing away from the second filter plate, and can push the first filter plate into contact with the second filter plate; the two sets of lifting mechanisms are respectively disposed on the outer side walls of the two support platforms and connected to the pushing mechanism, and can drive the first filter plate and the second filter plate to separate under the action of the pushing mechanism; Each of the lifting mechanisms described includes a rack, a gear, a shaft, and a cam; The rack is slidably disposed on the outer wall of the support platform and connected to the pushing mechanism via a connecting rod; the rotating shaft is rotatably connected to the support platform; the gear is interference-fitted to the end of the rotating shaft and meshes with the rack; the end of the rotating shaft is also provided with the cam, the bracket of the first filter plate side wall is located on the rotation path of the cam, and when the cam rotates, it can abut against the bottom of the bracket of the first filter plate side wall, thereby driving the first filter plate to separate from the second filter plate; The pushing mechanism includes a hydraulic cylinder and a push plate. The push plate is movably disposed on the side of the first filter plate facing away from the second filter plate. The hydraulic cylinder is connected to a mounting bracket on the side of the push plate facing away from the first filter plate. Before pressure filtration and dewatering, the hydraulic cylinder extends and pushes the pusher plate, which pushes the first filter plate closer to and in contact with the second filter plate to form a receiving cavity for accommodating the sludge between the first filter plate and the second filter plate.

2. The sludge dewatering device for sludge treatment according to claim 1, characterized in that: A guide groove is provided on the side wall of the support platform, and a slider is slidably arranged in the guide groove. The rack is fixed on the slider.

3. The sludge dewatering device for sludge treatment according to claim 1, characterized in that: A pawl is fitted onto the inner wall of the cam, and a ratchet is fixed on the outer peripheral wall of the shaft. The pawl engages with the ratchet so that the cam is positioned at the end of the shaft.

4. The sludge dewatering device for sludge treatment according to claim 1, characterized in that: The distal end face of the cam is configured as a toothed surface, and a toothed groove is formed at the bottom of the bracket on the side wall of the first filter plate to cooperate with the toothed surface. When the cam abuts against the bracket on the side wall of the first filter plate, the toothed surface and the toothed groove mesh.

5. The sludge dewatering device for sludge treatment according to any one of claims 1-4, characterized in that: Both the first and second filter plates have a connecting hole in the center for guiding sludge, and the connecting hole is connected to the external sludge tank by a feeding pipe.

6. The sludge dewatering device for sludge treatment according to claim 1, characterized in that: It also includes a flow supply mechanism, which includes a hot water tank, a first inlet pipe, a second inlet pipe, a first guide cavity, a second guide cavity, a first drain pipe, a second drain pipe, a first pump, and a second pump; The first filter plate has a first flow guiding cavity, and the second filter plate has a second flow guiding cavity. The drain end of the hot water tank is connected to the first guide cavity through the first inlet pipe and to the second guide cavity through the second inlet pipe; the inlet end of the hot water tank is connected to the first guide cavity through the first drain pipe and to the second guide cavity through the second drain pipe; the first pump is installed on the first inlet pipe and the second pump is installed on the second inlet pipe.

7. The sludge dewatering device for sludge treatment according to claim 6, characterized in that: Both the surface of the first filter plate and the surface of the second filter plate are evenly provided with a number of protrusions, and the number of protrusions form a flow guide groove. Both the first filter plate and the second filter plate have air inlets and drains at their edges. The air inlets, the guide grooves, and the drains form a connected body. The air inlets are connected to an external air pump via an air inlet pipe, and the drains are connected to an external sewage tank via a sewage drain pipe.

8. The sludge dewatering device for sludge treatment according to claim 7, characterized in that: The filter plate assembly is provided in N units, and the N filter plate assemblies are arranged side by side in the front-to-back direction. In two adjacent filter plate assemblies, the first filter plate and the second filter plate are alternately arranged, and N is a positive integer greater than 1. Each lifting mechanism is provided with N gears, N rotating shafts and N cams. The N rotating shafts are arranged side by side in the front-to-back direction, and the N gears and the N cams are respectively arranged on the N rotating shafts. The first water inlet pipe, the second water inlet pipe, the first drain pipe and the second drain pipe are each provided in N units, and the first water inlet pipe and the first drain pipe are connected to the first flow guide cavity in a one-to-one correspondence; The second inlet pipe and the second outlet pipe are connected to the second guide cavity in a one-to-one correspondence.

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