High-temperature-resistant and high-pressure-resistant double diaphragm filter plate

Abstract

The utility model discloses a kind of high-temperature-resistant high-pressure double diaphragm filter plate, including solid core plate, rubber diaphragm, filter cloth, rubber diaphragm clamping piece device, filter cloth clamping cloth device;The both sides of the solid core plate are equipped with the rubber diaphragm and the filter cloth, the rubber diaphragm is located between the solid core plate and the filter cloth;It is also equipped with the middle hole of through the solid core plate, the rubber diaphragm, the filter cloth;The rubber diaphragm clamping piece device is set in the middle hole, the inner edge of the rubber diaphragm corresponding middle hole is sealed and fixed on the solid core plate;The filter cloth clamping cloth device is set in the mouth of the middle hole, the inner edge of the filter cloth corresponding middle hole is fixed on the solid core plate.The high-temperature-resistant high-pressure double diaphragm filter plate of the utility model can be realized in use process both high-pressure-resistant and high-temperature-resistant application scene, rubber diaphragm can effectively avoid the damage of diaphragm piece due to the greater deformation stress of bulging in pressing process, reduce maintenance cost and production running cost.

Description

Technical Field

[0001] This utility model relates to the field of dewatering equipment technology, specifically to diaphragm filter plates for sludge dewatering and filter press equipment. Background Technology

[0002] In the sludge dewatering industry, complete sets of equipment such as belt filter presses, screw presses, centrifugal dewatering machines, and plate and frame filter presses are commonly used to reduce the moisture content of sludge, increase its solid content, and facilitate its transportation and subsequent disposal. Especially in the municipal sludge dewatering industry, with the increasing national standards and requirements for the moisture content of sludge leaving sewage treatment plants, and the problems caused by excessively high moisture content, such as high transportation costs, overly limited disposal methods, and easy spoilage of sludge during stockpiling, there is a need to further reduce the moisture content of sludge leaving the plant.

[0003] Existing suppliers of complete sludge dewatering equipment and process providers are constantly upgrading and iterating their technologies. Among them, the iterative upgrade of diaphragm plate and frame filter presses for sludge dewatering equipment is more prominent. At present, sludge dewatering pressing pressure has been achieved to reduce the moisture content of sludge at room temperature through material and process means. However, due to the limitations of materials and manufacturing processes, diaphragm plate and frame filters have not yet been able to be used under high temperature and high pressure. Utility Model Content

[0004] This invention addresses the technical problems of existing filter presses using diaphragm filter plates. Because the diaphragm filter plates and solid plates are multiple pieces pressed together, the material requirements for the elastic diaphragm sheets are extremely high, simultaneously needing to possess high elasticity, toughness, strength, and rigidity. This results in a short service life, and under excessive pressure, the diaphragm filter plates deform, causing sludge leakage. This also technically limits the feed pressure and pressing pressure of the diaphragm filter plates. Furthermore, to further reduce the sludge moisture content, hot water is typically used for pressing. However, existing diaphragm filter plates lack the ability to withstand both high pressure and high temperatures simultaneously. This further necessitates solving the problem of diaphragm filter plates that can withstand both high pressure and high temperatures in practical use.

[0005] To solve the above-mentioned technical problems, the purpose of this utility model is achieved through the following technical solution: providing a high-temperature and high-pressure resistant double diaphragm filter plate, including a solid core plate, a rubber diaphragm sheet, a filter cloth, a rubber diaphragm sheet clamping device, and a filter cloth clamping device;

[0006] The solid core plate is provided with the rubber diaphragm and the filter cloth on both sides, and the rubber diaphragm is located between the solid core plate and the filter cloth;

[0007] The outer edge of the rubber diaphragm is sealed to the solid core plate, forming a tympanic membrane chamber between the rubber diaphragm and the solid core plate; the solid core plate is provided with a press water inlet / outlet connector communicating with the tympanic membrane chamber;

[0008] The filter cloth covers the rubber diaphragm, and the rubber diaphragm has a plurality of rubber diaphragm protrusions on one side corresponding to the filter cloth, forming a water filtration channel between the rubber diaphragm protrusions; the solid core plate has filtration holes around the solid core plate, and the water filtration channel connects to the filtration holes around the solid core plate.

[0009] It also has a central hole that passes through the solid core plate, the rubber diaphragm, and the filter cloth; the rubber diaphragm clamp is disposed in the central hole and seals and fixes the inner edge of the rubber diaphragm corresponding to the central hole on the solid core plate; the filter cloth clamp is disposed at the opening of the central hole and fixes the inner edge of the filter cloth corresponding to the central hole on the solid core plate; the filter cloth clamp is provided with a clamping groove.

[0010] The rubber diaphragm sheet has a skirt edge strip along the inner edge corresponding to the central hole. The rubber diaphragm sheet skirt edge strip is disposed between the rubber diaphragm sheet clamp and the solid core plate. The rubber diaphragm sheet clamp has a rubber diaphragm sheet clamp groove adapted to the rubber diaphragm sheet skirt edge strip, and the rubber diaphragm sheet skirt edge strip is located in the rubber diaphragm sheet clamp groove.

[0011] The rubber diaphragm sheet also has a raised transition arc on the inner edge corresponding to the central hole, and the skirt strip of the rubber diaphragm sheet connects to the transition arc of the rubber diaphragm sheet.

[0012] The rubber diaphragm sheet is also provided with a rubber diaphragm sheet intermediate sealing strip on the inner edge corresponding to the intermediate sealing strip of the rubber diaphragm sheet; the solid core plate is provided with a solid core plate mounting intermediate sealing strip groove corresponding to the intermediate sealing strip of the rubber diaphragm sheet, and the intermediate sealing strip of the rubber diaphragm sheet is located in the intermediate sealing strip groove of the solid core plate.

[0013] The outer edge of the rubber diaphragm is provided with a sealing strip around the rubber diaphragm, and the solid core plate is provided with a groove for mounting the sealing strip around the solid core plate corresponding to the sealing strip around the rubber diaphragm. The sealing strip around the rubber diaphragm is located in the groove for mounting the sealing strip around the solid core plate.

[0014] The solid core plate is provided with a solid core plate pressing water passage hole, which penetrates the solid core plate and connects the tympanic membrane cavities on both sides of the solid core plate.

[0015] The solid core board is provided with a solid core board boss, and the rubber diaphragm is provided with a rubber diaphragm boss that protrudes outward. The rubber diaphragm boss and the solid core board boss are one-to-one corresponding. The rubber diaphragm boss is provided with a groove on the side opposite to the solid core board boss, and the solid core board boss is located in the groove corresponding to the rubber diaphragm boss.

[0016] The rubber diaphragm sheet is provided with rubber diaphragm sheet filtration holes, and the water filtration channel is connected to the rubber diaphragm sheet filtration holes; the solid core plate is provided with solid core plate filtration drainage holes corresponding to the rubber diaphragm sheet filtration holes; the solid core plate filtration drainage holes are connected to the filtration holes around the solid core plate.

[0017] Furthermore, the high-temperature and high-pressure resistant double-diaphragm filter plate also includes an intermediate material frame, which is disposed between the solid core plate and the filter cloth on its corresponding side, and the rubber diaphragm on its corresponding side is located inside the intermediate material frame, that is, the intermediate material frame surrounds the rubber diaphragm.

[0018] The solid core plate is also provided with hanging pins on its side for fixing the filter cloth.

[0019] Furthermore, the solid core board is also provided with a diaphragm plate handle on its side.

[0020] This invention relates to a high-temperature and high-pressure resistant double-diaphragm filter plate, capable of withstanding both high pressure and high temperature applications. Unlike traditional polypropylene diaphragms, rubber diaphragms, due to their higher elastic modulus, effectively prevent damage caused by significant deformation stress during pressing. Furthermore, rubber diaphragms experience significantly less pressure loss during bulging compared to polypropylene diaphragms. Therefore, under the same pressure, due to the higher elastic modulus of rubber, rubber diaphragms result in less pressure loss during bulging compared to polypropylene diaphragms, leading to greater pressing pressure on the filter cake and a lower moisture content. In addition, the rubber diaphragm filter plate employs an assembled structure. If a rubber diaphragm is damaged, it can be replaced individually, without replacing the core plate and other components. This avoids the need to replace the entire filter plate when the diaphragm is damaged, minimizing maintenance and operating costs. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a structural diagram of the high-temperature and high-pressure resistant double-diaphragm filter plate according to an embodiment of the present invention.

[0023] Figure 2 For along Figure 1 A cross-sectional view along the AA direction.

[0024] Figure 3 for Figure 2 A magnified view of a portion of region P.

[0025] Figure 4 for Figure 2 A magnified view of the Q region.

[0026] Figure 5 This is a structural diagram of a rubber diaphragm clip.

[0027] Figure 6 For along Figure 5 Cross-sectional view along the BB direction.

[0028] Figure 7 This is a structural diagram of a filter cloth clamp.

[0029] Figure 8 For along Figure 7 A cross-sectional view along the CC direction.

[0030] Figure 9 This is a structural diagram of the intermediate material frame.

[0031] Figure 10 For along Figure 5 A cross-sectional view along the DD direction.

[0032] Figure 11 for Figure 10 A magnified view of a portion of region E in the middle.

[0033] Figure 12 This is a structural diagram of a rubber diaphragm.

[0034] Figure 13 For along Figure 12 A cross-sectional view along the FF direction.

[0035] Figure 14 for Figure 13 A magnified view of a portion of region G in the middle.

[0036] Figure 15 for Figure 13 A magnified view of a portion of region H in the middle.

[0037] Figure 16 This is a structural diagram of a solid core board.

[0038] Figure 17 For along Figure 16 A cross-sectional view along the JJ direction.

[0039] Figure 18 for Figure 17 A magnified view of a portion of region M.

[0040] Figure 19 for Figure 17 A magnified view of a portion of region N in the middle.

[0041] Explanation of the markings in the image:

[0042] 1-Diaphragm plate handle, 2-Solid core plate, 3-Intermediate material frame, 4-Rubber diaphragm sheet, 5-Rubber diaphragm sheet clamp, 6-Filter cloth clamp, 7-Hanging pin, 8-Pressing inlet / outlet water connector, 9-Drum chamber, 10-Rubber diaphragm sheet clamp countersunk bolt hole, 11-Rubber diaphragm sheet clamp groove, 12-Filter cloth clamp fixing bolt hole, 13-Filter cloth clamp countersunk bolt hole, 14-Clamping groove, 15-Intermediate material frame groove bolt hole, 16-Intermediate material frame surrounding filtrate holes, 17-Rubber diaphragm sheet protrusion, 18-Rubber diaphragm sheet boss, 19-Rubber diaphragm sheet filtrate hole, 20- 21-Rubber diaphragm sheet protrusion, 22-Rubber diaphragm sheet skirt pressure strip, 23-Rubber diaphragm sheet middle sealing strip, 24-Rubber diaphragm sheet transition arc, 25-Rubber diaphragm sheet perimeter sealing strip, 26-Solid core board perimeter filtrate holes, 27-Solid core board filtrate drainage holes, 28-Solid core board boss, 29-Intermediate material frame fixing bolt holes, 30-Rubber diaphragm sheet clamp fixing bolt holes, 31-Pressing water inlet and outlet channels, 32-Solid core board pressing water through hole, 33-Solid core board mounting perimeter sealing strip groove, 34-Solid core board mounting intermediate sealing strip groove. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0044] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0045] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0046] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the appendix. Figure 1 The orientation or positional relationship shown, or the orientation or positional relationship in which the product of the invention is usually placed during use, is only for the purpose of facilitating the description of the present invention and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0047] The terms “first,” “second,” “third,” etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0048] The terms "parallel" and "perpendicular" do not mean that the components must be absolutely parallel or perpendicular, but rather that they can be slightly tilted. For example, "parallel" simply means that its direction is more parallel than "perpendicular," not that the structure must be completely parallel, but that it can be slightly tilted.

[0049] The terms "horizontal," "vertical," and "sag" do not imply that a component must be absolutely horizontal, vertical, or sagging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," not that the structure must be completely horizontal, but can be slightly tilted.

[0050] Furthermore, terms like "roughly" and "basically" are used to indicate that the content does not require absolute precision, but rather allows for a certain degree of deviation. For example, "roughly equal" does not simply mean absolute equality; in actual production and operation, achieving absolute "equality" is difficult, and a certain degree of deviation is generally present. Therefore, besides absolute equality, "roughly equal to" also includes the aforementioned situation where a certain degree of deviation exists. Using this as an example, in other cases, unless otherwise specified, terms like "roughly" and "basically" have similar meanings.

[0051] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0052] Example

[0053] Please see Figures 1 to 19 The high-temperature and high-pressure resistant double diaphragm filter plate shown includes a diaphragm plate handle 1, a solid core plate 2, an intermediate material frame 3, a rubber diaphragm sheet 4, a filter cloth (not shown in the figure), a rubber diaphragm sheet clamp 5, a filter cloth clamp 6, a cloth hanging pin 7, and a press inlet / outlet water connector 8.

[0054] like Figures 1 to 4 As shown, the diaphragm plate handle 1 is located on the side of the solid core plate 2, and diaphragm plate handles 1 are provided on both the left and right sides of the solid core plate 2. The diaphragm plate handle 1 is used to support the high temperature and high pressure resistant double diaphragm filter plate of the present invention to slide on the main beam of the filter press.

[0055] The solid core plate 2 serves as the skeleton structure of the high-temperature and high-pressure resistant double-diaphragm filter plate of this invention, and is equipped with rubber diaphragm sheets 4, intermediate material frames 3, pressing inlet and outlet water connectors 8, and cloth hanging pins 9. Rubber diaphragm sheets 4 and filter cloth are provided on both the front and rear sides of the solid core plate 2. The rubber diaphragm sheets 4 are located between the solid core plate 2 and the filter cloth, and the filter cloth covers the rubber diaphragm sheets 4. The outer edge of the rubber diaphragm sheets 4 is sealed to the solid core plate 2, forming a tympanic membrane chamber 9 between the rubber diaphragm sheets 4 and the solid core plate 2. The combination of the solid core plate 2 and the two rubber diaphragm sheets 4 forms tympanic membrane chambers 9 on both the front and rear sides of the solid core plate 2.

[0056] The solid core plate 2 is provided with a pressing water inlet / outlet connector 8 that connects to the tympanic membrane cavity. Specifically, the solid core plate 2 is provided with pressing water inlet / outlet connectors 8 on both the upper and lower sides. The pressing water inlet / outlet connectors 8 are used for pressing water to enter the tympanic membrane cavity 9 and to flow back out of the tympanic membrane cavity 9.

[0057] The upper side of the solid core plate 2 is provided with multiple cloth hanging pins 7, which are used to fix the top of the filter cloth.

[0058] The intermediate material frame 3 is positioned between the solid core plate 2 and the filter cloth on its corresponding side, with the rubber diaphragm 4 on its corresponding side located inside the intermediate material frame 3. In this embodiment, the intermediate material frame 3 is only provided on the front side of the solid core plate 2, avoiding contact between the rubber diaphragms on adjacent high-temperature and high-pressure resistant double-diaphragm filter plates of this invention during the pressing process, effectively preventing uncontrollable deformation of adjacent rubber diaphragms that could lead to poor sealing.

[0059] This high-temperature and high-pressure resistant double-diaphragm filter plate also has a central hole that runs through the solid core plate 2, the rubber diaphragm sheet 3, and the filter cloth. A rubber diaphragm sheet clamp 5 is disposed within the central hole, sealing and fixing the inner edge of the rubber diaphragm sheet 4 corresponding to the central hole onto the solid core plate 2. A filter cloth clamp 6 is disposed at the opening of the central hole, fixing the inner edge of the filter cloth corresponding to the central hole onto the solid core plate 2.

[0060] Reference Figure 5 and Figure 6The rubber diaphragm clamp shown is annular in shape, with countersunk bolt holes 10, grooves 11, and filter cloth clamping bolt holes 12. The countersunk bolt holes 10 are used for mounting bolts on the rubber diaphragm clamp 5. The grooves 11 are used to press down the skirt strip 21 of the rubber diaphragm, providing a sealing effect. The filter cloth clamping bolt holes 12 are used to fix the filter cloth clamp 6 to the rubber diaphragm clamp 5 and / or the solid core plate 2. It can be understood that rubber diaphragm clamps 5 are provided on both the front and rear sides of the solid core plate 2 to seal and fix the inner edges of the corresponding central holes of the rubber diaphragm 4.

[0061] Reference Figure 7 and Figure 8 The filter cloth clamp shown is annular in shape, with a countersunk bolt hole 13 and a clamping groove 14. In this embodiment, the countersunk bolt hole 13 is used to fix the filter cloth clamp 6 to the rubber diaphragm clamp 5 (indirectly fixed to the solid core plate 2). The clamping groove 14 is used to form a feeding chamber between two adjacent high-temperature and high-pressure resistant double diaphragm filter plates of the present invention. The adjacent clamping grooves 14 form a channel, and the material enters the feeding chamber through the groove during use.

[0062] Reference Figures 9 to 11 The intermediate material frame shown has a recessed bolt hole 15 and a filtration hole 16 around the intermediate material frame. The recessed bolt hole 15 is used to fix the intermediate material frame 3 to the solid core plate 2. The filtration hole 16 around the intermediate material frame matches the filtration hole 25 around the solid core plate 2.

[0063] Reference Figures 12 to 15 The rubber diaphragm shown has a rubber diaphragm protrusion 17, a rubber diaphragm boss 18, a rubber diaphragm filtrate hole 19, a rubber diaphragm protrusion 20, a rubber diaphragm skirt pressure strip 21, a rubber diaphragm 22 middle sealing strip, a rubber diaphragm transition arc 23, and a rubber diaphragm 24 perimeter sealing strip.

[0064] The rubber diaphragm sheet 4 has multiple rubber diaphragm sheet protrusions 17 on one side of the filter cloth, and a water filtration channel is formed between the rubber diaphragm sheet protrusions 17. Water in the sludge enters between the filter cloth and the rubber diaphragm sheet 4 through the filter cloth, and is collected in the filtrate holes 19 of the surrounding rubber diaphragm sheet through the water filtration channel.

[0065] The rubber diaphragm sheet 4 has multiple outwardly protruding rubber diaphragm sheet bosses 18, each corresponding to a solid core plate boss 27. Each rubber diaphragm sheet boss 18 has a groove on one side of its corresponding solid core plate boss 27, with the solid core plate boss 27 located within the groove of its corresponding rubber diaphragm sheet boss. The rubber diaphragm sheet bosses 18 and solid core plate bosses 27 provide a fixed support function, and the solid core plate bosses 27 of adjacent filter plates support each other, preventing filter plate deformation.

[0066] Rubber diaphragm sheet 4 is also provided with rubber diaphragm sheet protrusions 20 around its perimeter, and water guiding channels are formed between the rubber diaphragm sheet protrusions 20 to guide water in the sludge to the filtrate holes 19 of the rubber diaphragm sheet through the water guiding channels.

[0067] The rubber diaphragm sheet 4 has multiple rubber diaphragm sheet filtration holes 19 around its perimeter. The water filtration channel is connected to the rubber diaphragm sheet filtration holes 19 through the water guiding channel. The filtrate enters the filtration holes 25 around the solid core plate through the rubber diaphragm sheet filtration holes 19 and is discharged.

[0068] The rubber diaphragm sheet 4 has a rubber diaphragm sheet skirt strip 21 on the inner edge corresponding to the middle hole. The rubber diaphragm sheet skirt strip 21 is sandwiched between the rubber diaphragm sheet clamp 5 and the solid core plate 2. Specifically, the rubber diaphragm sheet skirt strip 21 is adapted to the rubber diaphragm sheet clamp groove 11 on the rubber diaphragm sheet clamp 5. The rubber diaphragm sheet skirt strip 21 is located in the rubber diaphragm sheet clamp groove 11 and is used to fix and press the rubber diaphragm sheet clamp 5 to achieve a sealing function.

[0069] The rubber diaphragm 4 is also provided with a rubber diaphragm intermediate sealing strip 22 on the inner edge of the corresponding intermediate hole. The rubber diaphragm intermediate sealing strip 22 is located in the solid core plate mounting intermediate sealing strip groove 34 on the solid core plate 2, which is used to fix the rubber diaphragm 4 in the center and to play a preliminary sealing role.

[0070] The rubber diaphragm 4 also has a raised transition arc 23 on the inner edge corresponding to the central hole, and the rubber diaphragm skirt strip 21 connects to the transition arc 23. The transition arc 23 is used to provide a redundancy for rubber deformation during diaphragm embolization, further extending the life of the rubber diaphragm.

[0071] The outer edge of the rubber diaphragm 4 is provided with a sealing strip 24 around the rubber diaphragm, which is located in the groove 32 for mounting the sealing strip on the solid core plate 2. The sealing strip 24 around the rubber diaphragm is used to press and fix the outer edge of the rubber diaphragm and to provide a seal.

[0072] Reference Figures 16 to 19The solid core plate 2 is provided with a solid core plate perimeter filtration hole 25, a solid core plate filtration drainage hole 26, a solid core plate boss 27, a middle material frame fixing bolt hole 28, a rubber diaphragm sheet clamping bolt hole 29, a pressing water inlet and outlet channel 30, a solid core plate pressing water through hole 31, a solid core plate mounting perimeter sealing strip groove 32, a middle material frame mounting groove 33, and a solid core plate mounting middle sealing strip groove 34.

[0073] The solid core plate 2 has a solid core plate perimeter filtrate 25 at each of its four corners, and the positions of the solid core plate perimeter filtrate 25 correspond one-to-one with the positions of the perimeter filtrate holes 16 of the intermediate material frame 3. The solid core plate perimeter filtrate 25 is used for filtrate discharge.

[0074] Each solid core plate 2 has multiple solid core plate filtrate drainage holes 26 on the inner side of the filtrate 25 around its perimeter. These solid core plate filtrate drainage holes 26 correspond one-to-one with the filtrate holes 19 on the rubber diaphragm sheet 4. The solid core plate filtrate drainage holes 26 connect the filtrate 25 around the solid core plate and the filtrate holes 19 on the rubber diaphragm sheet.

[0075] The solid core plate 2 is provided with multiple solid core plate protrusions 27. The solid core plate protrusions 27 serve as a skeleton to provide support, allowing the solid core plate protrusions 27 of two adjacent filter plates to support each other and prevent the filter plates from deforming.

[0076] The solid core plate 2 is provided with multiple intermediate material frame fixing bolt holes 28, which are used for bolt fixing of the intermediate material frame 3.

[0077] The solid core plate 2 is provided with multiple rubber diaphragm clamp fixing bolt holes 29, which are used for bolt fixing of the rubber diaphragm clamp 5.

[0078] The press water inlet and outlet channel 30 is located inside the solid core plate 2, connecting the press water inlet and outlet connector 8 with the tympanic membrane chamber 9. Press water enters or exits the tympanic membrane chamber through this press water inlet and outlet channel 30. It can be understood that each press water inlet and outlet connector 8 is connected to the press water inlet and outlet channel 30.

[0079] The solid core board 2 is provided with multiple solid core board pressing water passage holes 31, which penetrate the solid core board 2 and connect the tympanic membrane chambers 9 on both sides of the solid core board 2. The pressing water flows through the solid core board pressing water passage holes 31 between the two tympanic membrane chambers 9 on both sides of the solid core board 2, ensuring that the pressing water can flow freely between the two tympanic membrane chambers 9.

[0080] The groove 32 of the solid core plate is used to install the sealing strip around the perimeter, which corresponds to the sealing strip 24 around the perimeter of the rubber diaphragm, and is used for the installation, fixing and sealing of the sealing strip 24 around the perimeter of the rubber diaphragm.

[0081] The intermediate material frame mounting groove 33 corresponds to the position of the intermediate material frame 3 and is used to accommodate the installation of the intermediate material frame 3.

[0082] The groove 34 of the solid core plate for installing the intermediate sealing strip corresponds to the intermediate sealing strip 22 of the rubber diaphragm sheet, and is used for the installation, fixing and sealing of the intermediate sealing strip 22 of the rubber diaphragm sheet.

[0083] The design principle of this high-temperature and high-pressure resistant double-diaphragm filter plate is as follows:

[0084] A filter press is a general-purpose solid-liquid separation device widely used in industries such as chemical, metallurgy, ceramics, and environmental protection. The filter plate is the core component of the filter press. The filter plates are arranged and installed on the filter press beam, typically using a combination of a diaphragm filter plate and a solid chamber filter plate. The recesses of the two filter plates form the feed chamber.

[0085] The high-temperature and high-pressure resistant double diaphragm filter plate of this embodiment consists of two rubber diaphragm sheets 4 and a solid core plate 2. An external medium is introduced into the diaphragm chamber 9 between the rubber diaphragm sheets 4 and the solid core plate 2, causing the rubber diaphragm sheets 4 to inflate and compress the material in the feed filter chamber between the two diaphragm filter plates, thereby achieving better separation and improving the solids content.

[0086] Considering the need for high temperature resistance and elastic diaphragm, this embodiment uses rubber as the diaphragm material, which can withstand temperatures up to 120°C. At the same time, it has a high elastic modulus, which greatly extends the actual number of times the diaphragm can be used, significantly extending its service life compared to traditional polypropylene diaphragms and reducing production and operating costs.

[0087] In actual use, hot water pressing is used to further improve the solid content. The temperature of the hot water must be ensured during the pressing process. Therefore, two water inlet and outlet joints for pressing water are set on the solid core plate. The hot water for pressing can be continuously circulated during the pressing process to ensure the temperature of the pressing water.

[0088] Considering the sealing performance of the diaphragm filter plate, this embodiment has further optimized the structure. First, the sealing strips around the rubber diaphragm sheet are tightly fitted with the sealing strip grooves around the solid core plate. At the same time, a rubber diaphragm sheet clamp is provided. Made of stainless steel, it has excellent quality in terms of strength and hardness, ensuring that the rubber diaphragm sheet skirt strip in the middle is pressed tightly by the clamp to further seal the diaphragm sheet.

[0089] Considering that double diaphragms are more efficient and have better heat transfer than single diaphragms, this embodiment incorporates an intermediate material frame made of ultra-high molecular weight polyethylene (UHMWPE), which is corrosion-resistant and stronger than solid core polypropylene, to prevent direct contact between the rubber diaphragms on adjacent filter plates and ensure a tight seal during operation after the filter plates are pressed together.

[0090] To further extend the lifespan of the rubber diaphragm, a transition arc is incorporated into the design of the diaphragm. This provides a buffer for the rubber deformation during diaphragm formation, significantly reducing diaphragm stretching and extending its lifespan.

[0091] In summary, the high-temperature and high-pressure resistant double-diaphragm filter plate of this embodiment differs from the traditional structure of one diaphragm plate and one box-type plate. In this embodiment, the double diaphragm means that all filter plates are diaphragm plates, resulting in faster heat transfer and less loss during hot water pressing. The high-temperature and high-pressure resistant double-diaphragm filter plate has a diaphragm chamber 9 formed between the rubber diaphragm sheet 4 and the solid core plate 2. The four edges and the edge of the central hole of the rubber diaphragm sheet 4 are combined with the solid core plate by groove embedding. At the same time, the rubber diaphragm sheet clamp 5 further fixes the rubber diaphragms 4 on both sides of the solid core plate to the solid core plate, which plays a role in fixing and sealing the rubber diaphragm sheet 4, and also plays a role in installing the filter cloth clamp 6. Furthermore, an intermediate material frame 3 is set on one side of the rubber diaphragm sheet 4. The intermediate material frame 3 avoids contact between the rubber diaphragms on adjacent filter plates, ensuring the sealing of the diaphragm filter plate during operation after it is pressed, and ensuring that the diaphragm filter plate can realize double diaphragm. In addition, two pressing water inlet and outlet joints 8 and pressing water inlet and outlet channels 30 are provided to realize the circulation of pressing water during the pressing process and ensure the supply of heat.

[0092] This invention provides a high-temperature and high-pressure resistant double-diaphragm filter plate, capable of withstanding both high pressure and high temperature applications. Unlike traditional polypropylene diaphragms, rubber diaphragms, due to their high elastic modulus, effectively prevent damage caused by significant deformation stress during pressing. Furthermore, rubber diaphragms experience significantly less pressure loss during bulging compared to polypropylene diaphragms. Under the same pressure, rubber diaphragms result in less pressure loss during bulging, leading to greater pressing pressure on the filter cake and lower moisture content. In addition, the high-temperature and high-pressure resistant double-diaphragm filter plate of this invention employs an assembled structure. If a rubber diaphragm is damaged, it can be replaced individually, while the core plate and its components remain intact. This avoids the need for complete replacement of the entire filter plate when the diaphragm is damaged, minimizing maintenance and operating costs.

[0093] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A high-temperature and high-pressure resistant double-diaphragm filter plate, characterized in that, Includes solid core board, rubber diaphragm sheet, filter cloth, rubber diaphragm sheet clamp, and filter cloth clamp; The solid core plate is provided with the rubber diaphragm and the filter cloth on both sides, and the rubber diaphragm is located between the solid core plate and the filter cloth; The outer edge of the rubber diaphragm is sealed to the solid core plate, forming a tympanic membrane chamber between the rubber diaphragm and the solid core plate; the solid core plate is provided with a press water inlet / outlet connector communicating with the tympanic membrane chamber; The filter cloth covers the rubber diaphragm, and the rubber diaphragm has a plurality of rubber diaphragm protrusions on one side corresponding to the filter cloth, forming a water filtration channel between the rubber diaphragm protrusions; the solid core plate has filtration holes around the solid core plate, and the water filtration channel connects to the filtration holes around the solid core plate. It also has a central hole that passes through the solid core plate, the rubber diaphragm, and the filter cloth; the rubber diaphragm clamp is disposed in the central hole and seals and fixes the inner edge of the rubber diaphragm corresponding to the central hole on the solid core plate; the filter cloth clamp is disposed at the opening of the central hole and fixes the inner edge of the filter cloth corresponding to the central hole on the solid core plate; the filter cloth clamp is provided with a clamping groove.

2. The high-temperature and high-pressure resistant double-diaphragm filter plate according to claim 1, characterized in that, The rubber diaphragm sheet has a skirt edge strip along the inner edge corresponding to the central hole. The rubber diaphragm sheet skirt edge strip is disposed between the rubber diaphragm sheet clamp and the solid core plate. The rubber diaphragm sheet clamp has a rubber diaphragm sheet clamp groove adapted to the rubber diaphragm sheet skirt edge strip, and the rubber diaphragm sheet skirt edge strip is located in the rubber diaphragm sheet clamp groove.

3. The high-temperature and high-pressure resistant double-diaphragm filter plate according to claim 2, characterized in that, The rubber diaphragm sheet also has a raised transition arc on the inner edge corresponding to the central hole, and the skirt strip of the rubber diaphragm sheet connects to the transition arc of the rubber diaphragm sheet.

4. The high-temperature and high-pressure resistant double-diaphragm filter plate according to claim 3, characterized in that, The rubber diaphragm sheet is also provided with a rubber diaphragm sheet intermediate sealing strip on the inner edge corresponding to the intermediate sealing strip of the rubber diaphragm sheet; the solid core plate is provided with a solid core plate mounting intermediate sealing strip groove corresponding to the intermediate sealing strip of the rubber diaphragm sheet, and the intermediate sealing strip of the rubber diaphragm sheet is located in the intermediate sealing strip groove of the solid core plate.

5. The high-temperature and high-pressure resistant double-diaphragm filter plate according to claim 1, characterized in that, The outer edge of the rubber diaphragm is provided with a sealing strip around the rubber diaphragm, and the solid core plate is provided with a groove for mounting the sealing strip around the solid core plate corresponding to the sealing strip around the rubber diaphragm. The sealing strip around the rubber diaphragm is located in the groove for mounting the sealing strip around the solid core plate.

6. The high-temperature and high-pressure resistant double-diaphragm filter plate according to claim 1, characterized in that, The solid core plate is provided with a solid core plate pressing water passage hole, which penetrates the solid core plate and connects the tympanic membrane cavities on both sides of the solid core plate.

7. The high-temperature and high-pressure resistant double-diaphragm filter plate according to claim 6, characterized in that, The solid core board is provided with a solid core board boss, and the rubber diaphragm is provided with a rubber diaphragm boss that protrudes outward. The rubber diaphragm boss and the solid core board boss are one-to-one corresponding. The rubber diaphragm boss is provided with a groove on the side opposite to the solid core board boss, and the solid core board boss is located in the groove corresponding to the rubber diaphragm boss.

8. The high-temperature and high-pressure resistant double-diaphragm filter plate according to claim 1, characterized in that, The rubber diaphragm sheet is provided with rubber diaphragm sheet filtration holes, and the water filtration channel is connected to the rubber diaphragm sheet filtration holes; the solid core plate is provided with solid core plate filtration drainage holes corresponding to the rubber diaphragm sheet filtration holes; the solid core plate filtration drainage holes are connected to the filtration holes around the solid core plate.

9. The high-temperature and high-pressure resistant double-diaphragm filter plate according to claim 1, characterized in that, It also includes an intermediate material frame, which is disposed between the solid core plate and the filter cloth on its corresponding side, with the rubber diaphragm on its corresponding side located inside the intermediate material frame.

10. The high-temperature and high-pressure resistant double-diaphragm filter plate according to claim 1, characterized in that, The solid core plate is also provided with hanging pins on its side for fixing the filter cloth.

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