Filter pressing equipment for quartz sand sewage treatment and wastewater treatment system

Abstract

The utility model relates to the technical field of quartz sand production, in particular to filter pressing equipment for quartz sand sewage treatment and a wastewater treatment system, which comprise a filter pressing device and an auxiliary discharging device, a plurality of filter plates capable of being mutually opened and closed are arranged on the filter pressing device, one side of each filter plate is provided with a cavity groove for filling suspension liquid, and the other side of each filter plate is provided with an auxiliary discharging device. Filter cloth matched with the cavity grooves in the adjacent filter plate is arranged on the other side of the filter plate; the auxiliary discharging device comprises a pair of scraping mechanisms, a reset mechanism and a pair of wedge-shaped driving blocks, the pair of scraping mechanisms are slidably installed on the two sides of the cavity groove correspondingly, the pair of wedge-shaped driving blocks are movably inserted into the two sides of the filter plate, and the reset mechanism is installed in the filter plate and used for resetting the two scraping mechanisms; and one end of the wedge-shaped driving block is inserted into the wedge-shaped driving block on the other filter plate in a sliding manner. The wastewater treatment system can effectively improve the solid-liquid separation capacity in the sewage in the quartz sand production process, and can effectively solve the problem of sludge adhesion on the filter plate at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of quartz sand production, and particularly relates to a filter press device and a wastewater treatment system for quartz sand sewage treatment. Background Art

[0002] During the production process of quartz sand, it successively undergoes processes such as ore crushing, secondary pulverization, primary sieving, pickling, cleaning, drying, multiple rounds of color sorting, secondary sieving, packaging, etc. Among them, pickling and cleaning need to be carried out in multiple rounds, so a large amount of wastewater will appear in the actual production process. Since these wastewaters contain a large amount of residual acid solution, soluble salts, and slurry particles, and sulfuric acid is generally used during the pickling of quartz sand, sulfuric acid reacts with silicon dioxide and some metal oxides in the quartz sand to form soluble sulfates, silicic acid, and sulfurous acid. The metal oxides are generally mechanical iron. Therefore, these wastewaters need to be treated before being discharged. Currently, the main treatment method for these wastewaters is to first carry out neutralization precipitation with an alkaline solution and a flocculant, such as lime water, and then carry out solid-liquid separation through a filter press.

[0003] Currently, the commonly used filter presses in the industry are mainly plate and frame filter presses, which can achieve large-capacity filtration and are easy to maintain and replace filter cloth. However, the current plate and frame filter presses have the problem of difficult discharge. Due to the different components in the sewage, the filter mud has different degrees of viscosity, which makes it difficult for the filter mud to fall off from the filter cavity of the filter plate by itself. The most common current auxiliary sludge removal method is air-blowing assisted sludge removal, that is, several air holes are arranged inside the filter cavity. When discharging is required, high-pressure air can be introduced, and the high-pressure air is used to blow the filter mud out of the filter cavity. However, such an auxiliary discharging method can only blow out large pieces of filter mud and the filter mud in the area corresponding to the air holes, and the filter mud in the remaining area is easy to adhere to the filter cavity. During long-term use, it is easy for the filter mud to solidify and agglomerate, resulting in a decline in the filtration effect. In response to such a situation, some filter presses also add a flushing structure, such as Patent CN115445264B - A plate and frame filter press. Although this can avoid the filter mud from adhering to the filter cavity, due to the flushing process, the sewage after flushing is easy to mix with the fallen filter mud, increasing the moisture content of the filter mud, reducing the filtration quality, and the subsequent utilization of the filter mud.

[0004] In view of the above situation, the patent with the publication number CN114618198B discloses an auxiliary device for discharging materials of a plate-and-frame filter press. Through the functions of liquid injection and separation between filter plates, this auxiliary device drives a scraper to clean, thus playing a role in saving resources. However, in this patent, the scraping movement of the scraper mainly relies on the restoring force of an elastic tube for restoration. Therefore, this patent can only handle some filter mud with relatively low viscosity. After neutralization, the filter mud in quartz sand sewage is mainly calcium silicate, which has a high viscosity. Therefore, it is difficult for this device to handle such a situation. At the same time, the structure of the above patent results in very high elastic force requirements for the elastic tube. Otherwise, it is difficult to pull the scraper to move towards each other to scrape the filter mud out of the cavity, which will easily damage the elastic tube and increase the usage cost. Utility Model Content

[0005] In order to overcome one of the deficiencies of the prior art, the purpose of the present utility model is to provide a pressure filtration device and a wastewater treatment system for treating quartz sand sewage. The pressure filtration device and the wastewater treatment system for treating quartz sand sewage can effectively improve the solid-liquid separation ability of sewage in the quartz sand production process, and at the same time can effectively solve the problem of sludge adhesion on the filter plates.

[0006] To solve the above problems, the technical solutions adopted by the present utility model are as follows:

[0007] A pressure filtration device for treating quartz sand sewage, comprising

[0008] A pressure filtration device, on which there are provided a number of filter plates that can be opened and closed with each other. On one side of each filter plate, there is provided a filter cavity for filling a suspension. Each filter cavity on each filter plate is provided with a water inlet. On the other side of the filter plate, there is provided a filter cloth that cooperates with the filter cavity on the adjacent filter plate. The area of the filter plate located on the back of the filter cloth is provided with a water outlet;

[0009] An auxiliary discharging device, which includes a pair of scraping mechanisms, a reset mechanism, and a pair of wedge-shaped driving blocks. The two ends of the pair of scraping mechanisms are respectively slidably installed on the two side areas of the filter plate located in the filter cavity. The pair of wedge-shaped driving blocks are movably inserted on the two sides of the filter plate. The reset mechanism is installed inside the filter plate and is used to reset the two scraping mechanisms. One end of the wedge-shaped driving block is slidably inserted on the wedge-shaped driving block on the other filter plate; when two adjacent filter plates perform an opening and closing action, the previous filter plate can pull the wedge-shaped driving block on the latter filter plate to move along the opening and closing direction to drive the two scraping mechanisms to approach or move away from each other.

[0010] Furthermore, two wedge surfaces are provided on each of the wedge driving blocks. Both ends of each scraping mechanism are respectively and slidably connected and inseparable from the corresponding wedge surfaces on the two side wedge driving blocks. When the two wedge driving blocks both move along the opening and closing direction of the two filter plates, the wedge surfaces on each wedge driving block can slide relative to the corresponding end of the scraping mechanism to move closer to or away from each other.

[0011] Furthermore, each scraping mechanism includes a scraping blade and driving sliders provided at both ends of the scraping blade. The two driving sliders are respectively slidably mounted on the areas of the filter plate on both sides of the filter cavity. The scraping blade spans across the filter cavity and abuts against the bottom of the filter cavity. A driving portion is provided on the driving slider, and the driving portion can cooperate with the wedge surface on the corresponding side of the wedge driving block. The reset mechanism is connected to the driving slider. When the two filter plates open and close, the wedge driving block can drive the two scraping blades to move closer to or away from each other along the opening and closing direction of the filter plate.

[0012] Furthermore, the wedge surfaces on the wedge driving blocks are respectively provided on both sides in the height direction of the filter plate. An inverted T-shaped groove is provided on the wedge surface. A sliding groove is provided on the driving slider. The driving portion is slidably mounted in the sliding groove. The end of the driving portion is adapted to the inverted T-shaped groove. The guiding direction of the sliding groove is parallel to the moving direction of the wedge driving block on the filter plate.

[0013] Furthermore, the driving portion is slidably mounted on the corresponding wedge surface. A guiding groove parallel to the wedge surface is provided on the side surface of the wedge driving block. A hook portion cooperating with the guiding groove is provided on the outer end of the driving portion.

[0014] Furthermore, the scraping blade includes a scraping portion and connecting portions provided at both ends of the scraping portion. The two connecting portions and the scraping portion are arranged in a U shape. The scraping portion spans across the filter cavity and abuts against the bottom of the filter cavity. The two connecting portions are respectively connected to the corresponding driving sliders. The two connecting portions abut against the side walls of the filter cavity.

[0015] Furthermore, an insertion hole is provided at one end of the wedge driving block. A connecting rod is provided at the other end of the wedge driving block. The connecting rod can be movably inserted into the insertion hole on the other wedge driving block. One end of the connecting rod is connected to the insertion hole through a connecting buffer assembly.

[0016] Further, the connection buffer assembly includes a limiting plate movably sleeved on the connecting rod. The limiting plate is installed at the port of the insertion hole on the wedge-shaped driving block. One end of the connecting rod located in the insertion hole is movably sleeved with a return spring. One end of the return spring abuts against the side wall of the limiting plate, and the other end abuts against the limiting head at the end of the connecting rod.

[0017] Further, the filter press device includes a frame, a push plate slidably installed at one end of the frame, and a driving mechanism installed at one end of the frame. All the filter plates are slidably installed on the frame. A limiting plate is provided at one end of the frame away from the driving mechanism. The driving mechanism is used to drive the push plate to gradually approach or move away from the plurality of filter plates. Feeding pipes are provided on both sides of the upper part of the frame. The upper parts of all the filter plates are movably sleeved on the feeding pipes. A plurality of discharge ports are provided on the feeding pipes. When all the filter plates are tightly abutted and close to each other, each discharge port corresponds to each filter cavity one by one.

[0018] A wastewater treatment system includes the filter press equipment for quartz sand sewage treatment described above.

[0019] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0020] The filter press equipment for quartz sand sewage treatment of the present utility model designs an auxiliary discharging device on the basis of the filter press device. The wedge-shaped driving block is used to drive a pair of scraping mechanisms on each filter plate to move, realizing the cleaning work of the filter plates. The action of the wedge-shaped driving block is realized by the mold opening action of each filter plate in a linkage manner. All actions are directly driven by a pure mechanical structure, with rapid and direct actions, and can provide sufficient force to drive the scraping mechanism to perform scraping actions in the filter cavity. The whole scraping force is large, which is suitable for cleaning filter mud with high viscosity and ensures the cleaning effect of the filter plates. In addition, the wastewater treatment system uses a sewage pretreatment device to receive and neutralize sewage, so that soluble salts and residual acids in the sewage can be neutralized and precipitated at the same time, which is beneficial for the subsequent filter press device to separate mud and water. In addition, the sludge receiving device is used to receive the mud cakes dropped by the filter press device and the filtrate treatment device is used to receive the filtrate, which is beneficial for recycling the filter mud and filtrate.

[0021] The following further describes the present utility model in detail with reference to the drawings and specific embodiments. Description of the Drawings

[0022] Figure 1 is a schematic structural diagram of the wastewater treatment system in the embodiment of the present utility model;

[0023] Figure 2 is a schematic structural diagram of the filter plate in the embodiment of the present utility modelFigure 1 ;

[0024] Figure 3 is the structural schematic diagram of the filter plate in the embodiment of the present utility model Figure 2 ;

[0025] Figure 4 is the structural schematic diagram of the auxiliary discharging device in the embodiment of the present utility model;

[0026] Figure 5 is the partial structural schematic diagram of the scraping mechanism in the embodiment of the present utility model;

[0027] Figure 6 is the sectional view of the auxiliary discharging device installed in the filter plate in the embodiment of the present utility model;

[0028] Figure 7 is the structural schematic diagram of the auxiliary discharging device in another embodiment of the present utility model

[0029] Figure 8 is the structural schematic diagram of the cooperation between two filter plates in the embodiment of the present utility model.

[0030] Explanation of the reference numerals in the drawings:

[0031] Sewage pretreatment device 100, receiving tank 110, reaction tank 120, coagulation tank 130, sedimentation tank 140, filter 150, water outlet tank 160, neutralization feeder 170, water supply pipe 180, water pump 190;

[0032] Filter pressing device 200, filter plate 210, filter cavity 211, filter cloth 212, elastic area 213, frame 220, push plate 230, driving mechanism 240, limiting plate 250, feeding pipe 260;

[0033] Auxiliary discharging device 300, scraping mechanism 310, scraping blade 311, driving slider 312, driving part 313, air outlet groove 314, hook part 315, air outlet hole 316, scraping part 317, connecting part 318, sliding groove 319, reset mechanism 320, wedge-shaped driving block 330, wedge-shaped surface 331, inverted T-shaped groove 332, guiding groove 333, insertion hole 334, connecting rod 335, limiting head 336, connecting buffer assembly 340, limiting plate 341, reset spring 342;

[0034] Sludge receiving device 400, conveyor belt 410, collection box 420, collection tank 430;

[0035] Filter liquor treatment device 500, collection tank 510, sedimentation tank 520, overflow tank 530, clarification tank 540. Detailed implementation manners

[0036] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0037] Reference Figures 1 to 8 A wastewater treatment system is shown, the wastewater treatment system comprises a filter press device for treating quartz sand wastewater, a wastewater pretreatment device 100, a sludge receiving device 400 and a filtrate treatment device 500, the wastewater pretreatment device 100 is used to receive and neutralize wastewater; wherein, the filter press device for treating quartz sand wastewater comprises a filter press device 200 and an auxiliary discharge device 300. The sludge receiving device 400 is arranged below the filter press device 200, and is used to receive the mud cake dropped by the filter press device 200; the filtrate treatment device 500 is connected to the liquid outlets of all the filter plates 210.

[0038] The wastewater treatment system uses the sewage pretreatment device 100 to receive and neutralize sewage, so that the soluble salts and residual acids in the sewage can be neutralized and precipitated at the same time, which is beneficial to the subsequent mud and water separation of the filter press device 200. In addition, the sludge receiving device 400 is used to receive the mud cake dropped by the filter press device 200 and the filtrate treatment device 500 is used to receive the filtrate, which is beneficial to the recovery of filter mud and filtrate.

[0039] Among them, the filter press device 200 can be a conventional filter press device, and the present application is improved on the basis of a conventional plate and frame filter press. The sewage pretreatment device 100 in the present application mainly aims to collect, neutralize and precipitate the wastewater generated in the process of producing quartz sand. The sludge receiving device 400 is a combination of a conveyor belt 410 and a collection box 420, wherein the conveyor belt 410 is placed below the filter press device 200, and is used to collect the filter mud dropped by the filter press device 200 and transport it to the collection box 420 at the same time. The conveyor belt 410 is provided with a plurality of filter holes to facilitate the discharge of the filtered water seeped from the filter mud during the transportation process. A collection tank 430 is provided below the conveyor belt 410, wherein the collection tank 430 is connected to the filtrate treatment device 500. The filtrate treatment device 500 is mainly used to collect the wastewater discharged after the filter press device 200 is filtered. Due to the filterability of the filter cloth 212, it is impossible to completely filter the sediment in the wastewater. For this reason, the filtrate treatment device 500 also processes the filtered water for a secondary time. For this reason, the filtrate treatment device 500 can be some secondary precipitation equipment. In one embodiment of the present application, the filtrate treatment device 500 includes a collection tank 510, a sedimentation tank 520, an overflow tank 530 and a clarification tank 540 that are connected in sequence, wherein the bottom of the sedimentation tank 520 is connected to the sewage pretreatment device 100 through a suction device, so that the precipitated sludge can be reduced for secondary filter pressing. The clarification tank 540 is connected to the filter press device 200 through a pipeline for flushing the filter press device 200. The collection tank 430 is connected to the above-mentioned collection tank 510.

[0040] In one embodiment, the sewage pretreatment device 100 includes a receiving tank 110, a reaction tank 120, a coagulation tank 130, a sedimentation tank 140, a filter 150 and a water outlet tank 160 which are connected in sequence, the reaction tank 120 is connected with a neutralization feeder 170, the sedimentation tank 140 is connected with all the filter plates 210 through a water supply pipe 180, the water supply pipe 180 is provided with a pump 190 and a one-way valve, and the filtrate treatment device 500 is connected with the water outlet tank 160. In this embodiment, the receiving tank 110 is mainly used to receive sewage so that impurities in the sewage can be intercepted and separated, and alkali solution is added to the reaction tank 120 for reaction and neutralization, wherein the alkali solution is lime water in this application, wherein the lime water reacts with silicate, sulfurous acid, ferric sulfate and other substances in the sewage to form substances such as calcium silicate and ferric hydroxide that can be precipitated. The bottom of the sedimentation tank 140 is supplied to the filtrate treatment device 500 for pressure filtration through a suction device. The upper clarified liquid is filtered through the filter 150 and enters the outlet pool 160. The water in the outlet pool 160 is used to supply the filter plate 210 for washing. The sedimentation pool 520 in the above embodiment is connected to the sedimentation pool 140; in addition, in some embodiments, the clarification pool 540 is connected to the outlet pool 160 through a suction device.

[0041] In an embodiment of the present application, a number of filter plates 210 capable of opening and closing with each other are provided on the pressure filter device 200. A filter cavity 211 for filling the suspension is formed on one side of each filter plate 210. The filter cavity 211 on each filter plate 210 is communicated with the output end of the sewage pretreatment device 100. A filter cloth 212 cooperating with the filter cavity 211 on the adjacent filter plate 210 is arranged on the other side of the filter plate 210; the auxiliary discharging device 300 includes a pair of scraping mechanisms 310, a reset mechanism 320 and a pair of wedge-shaped driving blocks 330. Two ends of the pair of scraping mechanisms 310 are respectively slidably installed on two regions of the filter plate 210 on both sides of the filter cavity 211. The pair of wedge-shaped driving blocks 330 are movably inserted on both sides of the filter plate 210. The reset mechanism 320 is installed in the filter plate 210 and is used to reset the two scraping mechanisms 310. One end of the wedge-shaped driving block 330 is slidably inserted on the wedge-shaped driving block 330 on another filter plate 210; when two adjacent filter plates 210 perform the opening and closing action, the previous filter plate 210 can pull the wedge-shaped driving block 330 on the latter filter plate 210 to move along the opening and closing direction so as to drive the two scraping mechanisms 310 to approach or move away from each other.

[0042] The pressure filter equipment for quartz sand sewage treatment is designed with an auxiliary discharging device 300 on the basis of the pressure filter device 200. The pair of scraping mechanisms 310 on each filter plate 210 are driven to move by the wedge-shaped driving blocks 330, realizing the cleaning work of the filter plates 210. The action of the wedge-shaped driving blocks 330 is realized by the mold opening action of each filter plate 210 in a linkage manner, and thus sufficient acting force can be provided to drive the scraping mechanisms 310 to perform scraping actions in the filter cavity 211. The whole scraping acting force is large, which is suitable for cleaning filter mud with high viscosity and ensures the cleaning effect of the filter plates 210.

[0043] See Figure 1, in this application, the pressure filtration device 200 can be a conventional plate and frame filter press. Of course, in an improved embodiment, the pressure filtration device 200 includes a frame 220, a push plate 230 slidably mounted on one end of the frame 220, and a driving mechanism 240. The driving mechanism 240 is mounted on one end of the frame 220. All the filter plates 210 are slidably mounted on the frame 220. A limit plate 250 is provided at one end of the frame 220 away from the driving mechanism 240. The driving mechanism 240 is used to drive the push plate 230 to gradually approach or separate multiple filter plates 210. Feed pipes 260 are provided on both sides of the upper part of the frame 220. The upper parts of all the filter plates 210 are movably sleeved on the feed pipes 260. A number of discharge ports are provided on the feed pipes 260. The feed pipes 260 are communicated with the output end of the sewage pretreatment device 100, specifically, they are communicated with the water supply pipe 180. When all the filter plates 210 are tightly abutted and close to each other, each discharge port corresponds to the filter chamber 211 one by one.

[0044] In the above embodiment, a control valve is provided at the feed end of the feed pipe 260. Only when all the filter plates 210 are completely fitted, that is, when each discharge port corresponds to the filter chamber 211 one by one, the feed pipe 260 will be conducted at this time. This can avoid the situation of incorrect liquid supply in the feed pipe 260 during the mold opening process. It should be noted that adjacent two filter plates 210 are connected by a chain or a movable rod, so as to realize the sequential mold opening action. Of course, in some embodiments, adjacent two filter plates 210 can be opened by a buffer mechanism, such as a cooperation structure of a spring and a connecting rod or an elastic band for connection. In the above embodiment, the feed pipe 260 is communicated with the bottom of the sedimentation tank 140, and a suction device and a pipeline are provided between them. The water outlet on each filter plate 210 is similar to the design of the feed pipe 260. Only when the filter plate is in the closed mold state, the water outlet on each filter plate 210 can be communicated with the corresponding liquid outlet pipe. In fact, the above designs are all conventional technical means and are not described in detail in this application.

[0045] See Figures 2 to 7, in an embodiment of the present application, each of the scraping mechanisms 310 includes a scraping blade 311 and driving sliders 312 disposed at both ends of the scraping blade 311. The two driving sliders 312 are respectively slidably mounted on the regions of the filter plate 210 on both sides of the filter cavity 211. The scraping blade 311 spans across the filter cavity 211 and abuts against the bottom of the filter cavity 211. The reset mechanism 320 is connected to the driving slider 312. A driving portion 313 is provided on the driving slider 312. Two wedge surfaces 331 are provided on each of the wedge driving blocks 330. The driving portion 313 can cooperate with the corresponding wedge surface 331 on one side of the wedge driving block 330. When the two filter plates 210 open and close, the wedge driving block 330 can drive the two scraping blades 311 to approach or move away from each other along the opening and closing direction of the filter plates 210. In this embodiment, chutes are provided on the regions of the filter plate 210 on both sides of the filter cavity 211, where the chutes penetrate the outer shell of the filter plate 210. The driving sliders 312 are slidably mounted on the chutes and at the same time, one end extends into the interior of the filter plate 210. Among them, the driving portion 313 is disposed inside. In the simplest embodiment of the present application, the driving portion 313 can be a magnet, and an iron sheet for cooperating with the magnet is provided on the wedge surface 331. The adsorption force between the two enables them to be closely attached and connected. Of course, the cooperation relationship between the driving portion 313 and the wedge surface 331 can also be achieved through other connection methods, which will be described in detail below and are not limited to the methods listed in the present application. The reset mechanism 320 is a spring structure or a spring piece structure in the present application. One end thereof is connected to the inner wall of the filter plate 210, and the other end is connected to the driving slider 312. Specifically, whether it is a spring or a tension spring depends on the specific structural design. Among them, an installation cavity is provided in the region of the filter plate 210 where the wedge driving block 330 is installed. The installation cavity is actually at least partially a through-hole region penetrating the filter plate 210 for installing the wedge driving block 330, and the remaining region is used for installing the scraping mechanism 310 to facilitate the connection between the scraping mechanism 310 and the wedge driving block 330. In addition, an installation hole is provided on the installation cavity. The reset mechanism 320 is installed in the installation hole, and at the same time, one end of the reset mechanism 320 extends out of the installation hole and is connected to the driving slider 312.

[0046] Among them, the filter plate 210 is located on one side of the filter cavity 211 and cooperates with the filter cloth 212 on the back surface of another filter plate 210. The driving slider 312 is slidably installed on the side surface of the filter cloth 212 that cooperates with the back surface of the filter plate 210 and another filter plate 210. During the actual pressure filtration process of the two filter plates 210, the filter cloth 212 covers both ends of the scraping blade 311, and at the same time, the two filter plates 210 are tightly attached to ensure the pressure filtration effect. Of course, in some embodiments, in order to improve the sealing performance of the attachment, the initial positions of the two scraping blades 311 are respectively placed at both ends or the middle of the filter cavity 211, which is designed according to the actual use requirements. At the same time, at the initial positions of the two scraping blades 311, a receiving area for accommodating the two scraping blades 311 is provided in the outer area of the filter plate 210 located in the filter cavity 211, and the receiving area is recessed. In this way, when the two scraping blades 311 are respectively placed in the corresponding receiving areas, the two scraping blades 311 just fill the receiving area, so that the filter cloth 212 can completely adhere to the surfaces of the scraping blade 311 and another filter plate 210. At the same time, the filter cloth 212 also seals the chute, preventing sewage from entering the interior of the filter plate 210 through the chute during the pressure filtration process.

[0047] See Figure 3 , of course, in some improved embodiments, the two scraping blades 311 protrude from the surface of the filter plate 210, and an elastic area 213 capable of deforming is provided with a raised edge of the filter cloth 212. When two adjacent filter plates 210 are attached to each other, the elastic area 213 is deformed by the extrusion of the scraping blade 311, and thus the attachment seal can also be achieved. Similarly, when the two filter plates 210 are attached and sealed, the filter cloth 212 also seals the chute, preventing sewage from entering the interior of the filter plate 210 through the chute during the pressure filtration process.

[0048] See Figure 4 and Figure 6, in the above embodiments, to facilitate the cooperation between the wedge surface 331 and the driving part 313 so that the two can move in cooperation with the wedge driving block 330, the wedge surfaces 331 on the wedge driving block 330 are respectively arranged on both sides in the height direction of the filter plate 210. An inverted T-shaped groove 332 is arranged on the wedge surface 331, a sliding groove 319 is arranged on the driving slider 312, the driving part 313 is slidably installed in the sliding groove 319, the end of the driving part 313 is adapted to the inverted T-shaped groove 332, and the guiding direction of the sliding groove 319 is parallel to the moving direction of the wedge driving block 330 on the filter plate 210. Among them, the end of the driving part 313 is in an inverted T shape and is adapted to the inverted T-shaped groove 332. During the mold opening process of the two filter plates 210, the previous filter plate 210 will pull the wedge driving block 330 on the latter filter plate 210 to move along the mold opening direction. At this time, due to the lag of the latter filter plate 210, the wedge surface 331 will slide relative to the driving part 313. At this time, the guiding effect of the inverted T-shaped groove 332 on the wedge surface 331 will gradually drive the driving part 313, and then push the entire scraping mechanism 310 to slide in the filter cavity 211, so as to realize that the scraping blade 311 scrapes the filter mud adhered in the filter cavity 211. Among them, in this embodiment, the main function of the sliding groove 319 is to offset the movement amount of the wedge surface 331 in the direction parallel to the movement direction of the wedge driving block 330 on the filter plate 210, leaving only the movement amount along the chute direction, that is, the movement amount in the opening and closing direction of the two scraping blades 311.

[0049] In addition, due to the different guiding directions of the wedge surfaces 331, during the mold opening process of the two filter plates 210, the two scraping blades 311 may move towards each other or away from each other. In actual use, to facilitate the pressure filtration of the filter mud, it is preferred in this application that the initial positions of the two scraping blades 311 are located at both ends of the filter cavity 211. Therefore, when the wedge driving block 330 moves along the mold opening direction, in order to realize the two scraping blades 311 moving towards each other, the two wedge surfaces 331 are arranged in a horn shape, and the large end faces the mold opening direction.

[0050] In the above embodiments, since the movement of the entire scraping blade 311 is controlled by the guiding restriction of the driving part 313 and the inverted T-shaped groove 332, although the driving is direct, it is easy to cause wear between the driving part 313 and the inverted T-shaped groove 332, and it is also difficult to replace in the later stage. For this reason, in an improved embodiment of this application, see Figure 7, the driving part 313 is slidably mounted on the corresponding wedge surface 331. A guiding groove 333 parallel to the wedge surface 331 is provided on the side surface of the wedge driving block 330. A hook part 315 cooperating with the guiding groove 333 is provided at the outer end of the driving part 313. In this embodiment, the driving principle of the scraping blade 311 is the same as that of the previous embodiment. It also relies on the guiding action of the cooperation between the wedge surface 331 and the guiding groove 333 to convert the movement of the wedge driving block 330 in the mold opening direction into the acting force in the vertical direction. The specific action process is not described in detail in this application.

[0051] See Figure 4 and Figure 5 , in order to facilitate scraping the filter mud from the filter cavity 211 and prevent the filter mud from adhering to the scraping blade 311 at the same time. In an embodiment of the present application, an air outlet groove 314 is provided along the length direction on the outer side of the scraping blade 311. An air passing channel is provided in the scraping blade 311. A plurality of air outlet holes 316 are provided at the bottom of the air outlet groove 314. The air passing channel is communicated with all the air outlet holes 316. The air inlet of the air passing channel is arranged on the driving slider 312. The air inlet of the air passing channel is communicated with the air inlet assembly through a hose. Among them, the pressurized gas blown out by the air inlet assembly enters the air outlet groove 314 through the air outlet holes 316. During the actual process of scraping the filter mud, the filter mud adheres tightly to the outer surface of the scraping blade 311, making the air outlet groove 314 form a closed groove body. At this time, due to the continuous supply of pressurized gas by the air inlet assembly, the pressurized gas overflows from the edge of the air outlet groove 314. At the same time, because the air outlet groove 314 is arranged along the length direction of the scraping blade 311, the air film is evenly arranged as a whole, and then an air film will be formed between the filter mud and the outer surface of the scraping blade 311, which is beneficial to separating the filter mud and the scraping blade 311 and reducing the adhesion between the two. After the scraping blade 311 slides relative to the filter cavity 211, the remaining air film will continue to isolate the filter mud and the bottom of the filter cavity 211. Therefore, to a certain extent, the filter mud can be effectively separated from the filter cavity 211, reducing the residue and avoiding the trouble of subsequent flushing.

[0052] See Figure 4 and Figure 5, in an embodiment of the present application, in order to make the wiper 311 fit the filter cavity 211, the wiper 311 includes a scraping portion 317 and connecting portions 318 provided at both ends of the scraping portion 317. The two connecting portions 318 and the scraping portion 317 are arranged in a U shape. The scraping portion 317 spans across the filter cavity 211 and abuts against the bottom of the filter cavity 211. The two connecting portions 318 are respectively connected to the corresponding driving sliders 312, and the two connecting portions 318 abut against the side walls of the filter cavity 211. Among them, the shapes of the connecting portion 318 and the scraping portion 317 are mainly set to fit the shape formed by the three side surfaces of the filter cavity 211, which is beneficial to peeling the filter mud from the filter cavity 211.

[0053] Further refer to Figure 4 , Figure 6 and Figure 8, in order to enable the wedge-shaped drive blocks 330 on two adjacent filter plates 210 to be interlocked with each other, that is, when the drive mechanism 240 pulls the filter plates 210 in sequence through the push plate 230 to open the mold, the wedge-shaped drive blocks 330 are also driven in sequence to scrape the filter mud in the filter cavity 211. In an embodiment of the present application, an insertion hole 334 is provided at one end of the wedge-shaped drive block 330, and a connecting rod 335 is provided at the other end of the wedge-shaped drive block 330. The connecting rod 335 can be movably inserted into the insertion hole 334 on another wedge-shaped drive block 330, and one end of the connecting rod 335 is connected to the insertion hole 334 through a connection buffer assembly 340. Among them, when the two filter plates 210 are opened, the connecting rod 335 on the wedge-shaped drive block 330 of the previous filter plate 210 moves relative to the insertion hole 334. At this time, the connecting rod 335 is gradually pulled out of the insertion hole 334, and the connection buffer assembly 340 is compressed to store energy. At this time, the wedge-shaped drive block 330 on the latter filter plate 210 also begins to gradually perform the mold opening action, and then drives the two scraping blades 311 to move towards or away from each other to scrape the filter mud in the filter cavity 211. The interlocking mold opening between the two filter plates 210 is generally achieved by a chain or a connecting rod structure to perform sequential hard connection mold opening. Of course, in some embodiments, a flexible buffer mold opening method is also adopted between the two filter plates 210, similar to the connection buffer assembly 340 in the present application. In view of this situation, the connection buffer assembly 340 in the present application can be a leaf spring or a spring structure. The main purpose of the connection buffer assembly 340 is to enable the latter wedge-shaped drive block 330 to have a certain lag in its movement relative to the previous filter plate 210, which is beneficial for the latter filter plate 210 to have a certain lag when following the previous filter plate 210 for interlocking mold opening, and is beneficial for the two scraping blades 311 to gradually scrape the filter mud in the filter cavity 211 along with the mold opening action during the mold opening process. The present application preferably adopts this design. Of course, if the two filter plates 210 are sequentially and rigidly connected to open the mold through a chain or a connecting rod structure, the function of the connection buffer assembly 340 at this time makes the two scraping blades 311 have a certain lead in opening the mold relative to the two filter plates 210. At this time, since the two filter plates 210 are not opened, the filter mud cannot fall from the filter cavity 211, resulting in the problem of repeated adhesion, and at the same time, the scraping force required by the two scraping blades 311 is greater.

[0054] See Figure 6 and Figure 8, in an embodiment of the present application, in order to achieve the above-mentioned buffering lag effect, the connection buffer assembly 340 includes a limiting plate 341 movably sleeved on the connecting rod 335. The limiting plate 341 is installed at the port of the insertion hole 334 on the wedge-shaped driving block 330. A return spring 342 is movably sleeved on one end of the connecting rod 335 located in the insertion hole 334. One end of the return spring 342 abuts against the side wall of the limiting plate 341, and the other end abuts against the limiting head 336 at the end of the connecting rod 335. Among them, the limiting plate 341 is fixed to the wedge-shaped driving block 330 by screws, and the limiting head 336 and the connecting rod 335 are connected by threads, which is convenient for replacing the return spring 342 later. It should be noted that in the fully open mold state, the return spring 342 is completely compressed, and in the fully closed mold state, the return spring 342 is completely extended.

[0055] The above-mentioned embodiments are only the preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention fall within the scope of protection required by the present invention.

Claims

1. A filter press for quartz sand sewage treatment, characterized in that: include A filter press device, on which a plurality of filter plates capable of opening and closing with each other are arranged, a filter cavity for filling the suspension is opened on one side of each filter plate, the filter cavity on each filter plate is provided with a water inlet, a filter cloth cooperating with the filter cavity on the adjacent filter plate is arranged on the other side of the filter plate, and a water outlet is arranged in the area of ​​the filter plate located on the back of the filter cloth; An auxiliary discharging device comprises a pair of scraping mechanisms, a reset mechanism and a pair of wedge-shaped driving blocks, wherein the two ends of the scraping mechanisms are respectively slidably mounted on the two side areas of the filter plate located at the filter chamber, and the pair of wedge-shaped driving blocks are movably inserted on the two sides of the filter plate. The reset mechanism is installed in the filter plate and is used to reset the two scraping mechanisms, and one end of the wedge-shaped driving block is slidably inserted on the wedge-shaped driving block on the other filter plate. When two adjacent filter plates are in an opening and closing action, the preceding filter plate can pull the wedge-shaped driving block on the following filter plate to move along the opening and closing direction to drive the two scraping mechanisms to move closer to or away from each other.

2. The filter press equipment for quartz sand sewage treatment according to claim 1, characterized in that: Each of the wedge-shaped driving blocks is provided with two wedge-shaped surfaces, and the two ends of each scraping mechanism are slidably connected with the corresponding wedge-shaped surfaces on the wedge-shaped driving blocks on both sides and are not separated. When the two wedge-shaped driving blocks move along the opening and closing directions of the two filter plates, the wedge surfaces on each wedge-shaped driving block can slide relative to the corresponding end of the scraping mechanism to achieve mutual approach or distance.

3. The filter press equipment for quartz sand sewage treatment according to claim 2 is characterized in that: Each of the scraping mechanisms includes a scraper and a driving slider arranged at both ends of the scraper. The two driving sliders are respectively slidably mounted on the areas of the filter plate located on both sides of the filter chamber. The scraper spans the filter chamber and abuts against the bottom of the filter chamber. A driving part is provided on the driving slider, and the driving part can cooperate with the wedge-shaped surface on the corresponding side of the wedge-shaped driving block. The reset mechanism is connected to the driving slider. When the two filter plates open and close, the wedge-shaped driving block can drive the two scrapers to move closer to or away from each other along the opening and closing direction of the filter plates.

4. The filter press equipment for quartz sand sewage treatment according to claim 3 is characterized in that: The wedge surfaces on the wedge-shaped driving block are respectively arranged on both sides of the height direction of the filter plate, and an inverted T-shaped groove is arranged on the wedge surface. A sliding groove is arranged on the driving slider, and the driving part is slidably installed in the sliding groove. The end of the driving part is adapted to the inverted T-shaped groove, and the guiding direction of the sliding groove is parallel to the direction in which the wedge-shaped driving block moves on the filter plate.

5. The filter press equipment for quartz sand sewage treatment according to claim 3 is characterized in that: The driving part is slidably mounted on the corresponding wedge surface, a guide groove parallel to the wedge surface is arranged on the side surface of the wedge-shaped driving block, and a hook part cooperating with the guide groove is arranged on the outward end of the driving part.

6. The filter press equipment for quartz sand sewage treatment according to claim 3 is characterized in that: The scraper blade includes a scraping part and connecting parts arranged at both ends of the scraping part. The two connecting parts and the scraping part are arranged in a U shape. The scraping part spans the filter chamber and abuts against the bottom of the filter chamber. The two connecting parts are respectively connected to corresponding driving sliders, and the two connecting parts abut against the side walls of the filter chamber.

7. A filter press device for treating quartz sand sewage according to any one of claims 1 to 6, characterized in that: An insertion hole is provided on one end of the wedge-shaped driving block, and a connecting rod is provided on the other end of the wedge-shaped driving block. The connecting rod can be movably inserted into the insertion hole on another wedge-shaped driving block, and the connecting rod is connected to one end of the insertion hole through a connecting buffer assembly.

8. The filter press equipment for quartz sand sewage treatment according to claim 7, characterized in that: The connection buffer assembly includes a limiting plate movably mounted on the connecting rod, the limiting plate is installed on the port of the insertion hole on the wedge-shaped driving block, and a return spring movably mounted on one end of the connecting rod located in the insertion hole, one end of the return spring abuts against the side wall of the limiting plate, and the other end abuts against the limiting head on the end of the connecting rod.

9. The filter press equipment for quartz sand sewage treatment according to claim 1, characterized in that: The filter press device includes a frame, a push plate slidably mounted on one end of the frame, and a driving mechanism, the driving mechanism being mounted on one end of the frame, all of the filter plates being slidably mounted on the frame, a limit plate being provided on one end of the frame away from the driving mechanism, the driving mechanism being used to drive the push plate to gradually bring the multiple filter plates closer together or further away from each other, feed pipes being provided on both sides of the upper portion of the frame, the upper portions of all of the filter plates being movably mounted on the feed pipes, a plurality of discharge ports being provided on the feed pipes, and when all of the filter plates are close together, each of the discharge ports corresponds one-to-one to the filter chamber.

10. A wastewater treatment system, characterized in that: The invention comprises the filter press equipment for treating quartz sand sewage as described in any one of claims 1 to 9.

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