Cascade type super-high pressure filter press

Abstract

The utility model discloses a kind of cascade dimension extra-high pressure filter presses, including rack;Filtering mechanism, including filter plate, filter plate is provided with the filter cavity for forming filter cake and the diaphragm cavity for diaphragm squeezing;Feeding mechanism, with multiple filter cavities communication, for conveying coal slime water sequentially into multiple filter cavities and forms filter cake;Air inlet mechanism, with multiple diaphragm cavities communication, for conveying high-pressure fluid into multiple diaphragm cavities, diaphragm squeezing is carried out;Counter-pressure mechanism, between thrust plate and filter plate is set, including fixed base plate, fixed base plate is provided with pusher assembly, pusher assembly is connected with transmission plate, the side of transmission plate close to filter plate is abutted with filter plate, and pusher assembly is connected with air inlet mechanism, for pushing transmission plate moves along close to filter plate direction and abuts tightly the filter plate.The utility model can provide reverse force to filter plate when diaphragm squeezing, prevent filter plate from slackening when diaphragm squeezing, improve diaphragm squeezing effect, further reduce filter cake moisture content.

Description

Technical Field

[0001] This utility model relates to the field of solid-liquid separation equipment technology, and in particular to a cascade ultra-high pressure filter press. Background Technology

[0002] A filter press is a solid-liquid separation device widely used in industries such as chemical and mining. Its working principle involves a hydraulic system pressing multiple filter plates together, forming a filtration chamber between adjacent plates. Coal slurry to be filtered is pumped into this chamber; under pressure, the liquid passes through the filter cloth as filtrate and is discharged, while the solids are retained in the filtration chamber to form a filter cake. Each filter plate has two fixed diaphragms in the middle, forming a diaphragm cavity between them. After the first pressing, the diaphragm inlet valve is opened, supplying fluid (water or air) into the diaphragm cavity for a second pressing of the filter cake, reducing its moisture content. Among these, the tiered ultra-high pressure filter press is a type of diaphragm filter press; its hydraulic system can provide pressures exceeding 3 MPa, and the applied pressure can be adjusted in a gradient from low to high.

[0003] In existing filter presses, during the secondary pressing of the filter cake, the pressing force is mainly generated by the direct squeezing of the filter cake by the diaphragm. Under high-pressure pressing conditions, the high-pressure fluid in the diaphragm chamber applies pressure to the filter cake while also applying an outward thrust to the filter plates, attempting to push the two adjacent filter plates away from it. This results in the filter plates becoming loose, increasing the effective volume in the filtration chamber, and consequently reducing the actual pressure acting on the filter cake, thus decreasing the pressing effect of the diaphragm pressing on the filter cake. Utility Model Content

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a tiered ultra-high pressure filter press that can provide a reverse force on the filter plate during diaphragm pressing, prevent the filter plate from loosening during diaphragm pressing, improve the diaphragm pressing effect, and further reduce the moisture content of the filter cake.

[0005] This utility model provides a tiered ultra-high pressure filter press, comprising: frame; The filter press mechanism includes two main beams fixedly mounted on the frame in a horizontal direction. The two main beams are arranged side by side, and multiple sets of filter plates are slidably arranged between the two main beams along their length. A thrust plate is fixedly mounted on one end of each main beam, and a clamping member is mounted on the other end. The clamping member can push the multiple sets of filter plates to move and clamp them. The filter plates are provided with a filter chamber for forming a filter cake and a diaphragm chamber for diaphragm pressing. The feeding mechanism is connected to multiple sets of filter chambers and is used to transport coal slurry water into the multiple sets of filter chambers in sequence, and form filter cake in the filter chambers. An air intake mechanism, connected to multiple sets of diaphragm chambers, is used to deliver high-pressure fluid into the multiple sets of diaphragm chambers to perform diaphragm pressing on the filter cake; A back pressure mechanism is disposed between the thrust plate and the filter plate, including a fixed base plate fixedly disposed on the thrust plate, a pushing component disposed on the fixed base plate, a transfer plate connected to the pushing component, the side of the transfer plate near the filter plate abutting against the filter plate, and the pushing component being connected to the air intake mechanism for pushing the transfer plate to move in a direction close to the filter plate and press against the filter plate.

[0006] Furthermore, the feeding mechanism includes a first feeding pipe, a second feeding pipe, and a high-pressure hose. The first feeding pipe is fixedly inserted through the thrust plate and the fixed base plate in a horizontal direction, and the second feeding pipe is fixedly inserted through the transfer plate in a horizontal direction. The high-pressure hose is fixedly connected between the first feeding pipe and the second feeding pipe through a flange.

[0007] Furthermore, the air intake mechanism includes an air intake manifold, one end of which is connected to an external air supply mechanism, and multiple air intake branch pipes are connected to the air intake manifold. The diaphragm cavity is connected to the air intake manifold through the air intake branch pipes. The main intake pipe is also equipped with a diaphragm intake valve and a diaphragm exhaust valve.

[0008] Furthermore, an annular flow channel is formed inside the fixed base plate, and the annular flow channel is connected to the main air intake pipe through a connecting pipe.

[0009] Furthermore, the pushing assembly includes cylinders, and multiple cylinders are fixedly connected in a circular array on the side of the fixed base plate away from the thrust plate. The cylinders are arranged in a horizontal direction, and a piston plate is slidably sleeved inside them. The piston plate seals the inside of the cylinders to form a first inner cavity and a second inner cavity. The first inner cavity communicates with the annular flow channel, and a piston rod is slidably sleeved in the second inner cavity. One end of the piston rod is fixedly connected to the piston plate, and the other end is fixedly connected to the transfer plate.

[0010] Furthermore, a sealing ring is fixedly fitted on the outer ring of the piston plate, and the outer ring of the sealing ring is in contact with the inner wall of the cylinder.

[0011] Furthermore, it also includes a reset mechanism, which includes multiple telescopic rods fixedly disposed horizontally between the fixed base plate and the transfer plate. A reset spring is sleeved on the outside of the telescopic rod. One end of the reset spring is fixedly connected to the fixed base plate, and the other end is fixedly connected to the transfer plate. The elastic force of the reset spring can pull the transfer plate to move away from the filter plate.

[0012] Compared with the prior art, the beneficial effects of this utility model are: This invention uses a clamping component and a thrust plate to press multiple filter plates together. A counter-pressure mechanism is provided between the thrust plate and the filter plates. The transfer plate in the counter-pressure mechanism abuts against the filter plate closest to it. Subsequently, coal slurry is conveyed through a feeding mechanism. The coal slurry passes through multiple filter plates and forms a filter cake in the filtration chamber on the filter plates. Then, high-pressure gas is conveyed into the diaphragm chamber through an air intake mechanism to perform diaphragm pressing on the filter cake. When the air intake mechanism is activated, the high-pressure gas enters the pushing component of the counter-pressure mechanism, which pushes the transfer plate closer to the filter plates and squeezes the filter plates, applying a reverse thrust to the filter plates. This further compresses the filter plates, reduces the effective volume in the filtration chamber, and thus increases the pressing force on the filter cake, enhancing the pressing effect of the diaphragm pressing on the filter cake and achieving more thorough dewatering.

[0013] It should be understood that the description in this utility model description section is not intended to limit the key or essential features of the embodiments of this utility model, nor is it intended to restrict the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0014] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the overall front structure of this utility model; Figure 2 This is a top view of the overall structure of this utility model; Figure 3 This is a schematic diagram of the structure of the push plate, filter plate, feeding mechanism and back pressure mechanism of this utility model; Figure 4 This is a schematic diagram of the internal structure of the stop push plate, filter plate, feeding mechanism and back pressure mechanism of this utility model; Figure 5 This is a schematic diagram of the front structure of the filter plate; Figure 6 This is a magnified view of a portion of the side of the filter plate; Figure 7 This is a schematic diagram of the end face structure of the fixed substrate; Figure 8 This is a schematic diagram of the internal structure of the fixed substrate; Figure 9 This refers to the internal structure of the cylinder. The diagram shows the following components: 1. Frame; 2. Filter press mechanism; 3. Feeding mechanism; 4. Air intake mechanism; 5. Back pressure mechanism; 6. Reset mechanism. 21. Main beam; 22. Filter plate; 23. Thrust plate; 24. Hydraulic cylinder; 25. Clamping plate; 31. First feed pipe; 32. Second feed pipe; 33. High-pressure hose; 41. Main intake manifold; 42. Branch intake manifold; 51. Fixed substrate; 52. Pushing assembly; 53. Transfer plate; 61. Return spring; 221. Filter chamber; 222. Diaphragm chamber; 511. Annular flow channel; 512. Connecting pipe; 521. Cylinder barrel; 522. Piston plate; 523. Piston rod; 22-1 Mounting frame; 22-2, Permeable trough plate; 22-3, Diaphragm; 22-4, Filter cloth. Detailed Implementation

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0016] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0017] Please refer to Figures 1-8 The present invention provides a tiered ultra-high pressure filter press, characterized in that it comprises: Rack 1; The filter press mechanism 2 includes two main beams 21 fixedly mounted on the frame 1 in the horizontal direction. The two main beams 21 are arranged side by side, and multiple sets of filter plates 22 are slidably arranged between the two main beams 21 along their length. A thrust plate 23 is fixedly mounted on one end of the main beam 21, and a pressing member is mounted on the other end. The pressing member can push the multiple sets of filter plates 22 to move and press them together. The filter plates 22 are provided with a filter chamber 221 for forming filter cake and a diaphragm chamber 222 for diaphragm pressing. The feeding mechanism 3 is connected to multiple sets of filter chambers 221 and is used to transport coal slurry water into the multiple sets of filter chambers 221 in sequence, and form filter cake in the filter chambers. The air intake mechanism 4 is connected to multiple diaphragm chambers 222 and is used to deliver high-pressure fluid into the multiple diaphragm chambers 222 to perform diaphragm pressing on the filter cake. The back pressure mechanism 5 is disposed between the thrust plate 23 and the filter plate 22. It includes a fixed base plate 51 fixedly disposed on the thrust plate 23. A pushing component 52 is disposed on the fixed base plate 51. The pushing component 52 is connected to a transfer plate 53. The side of the transfer plate 53 near the filter plate 22 abuts against the filter plate 22. The pushing component 52 is connected to the air intake mechanism 4 and is used to push the transfer plate 53 to move in the direction close to the filter plate 22 and press against the filter plate 22.

[0018] In this embodiment, as Figure 4 , Figure 5 and Figure 6 As shown, the filter plate 22 can be an existing filter plate with a conventional structure, including a rectangular mounting frame 22-1. A permeable trough plate 22-2 is fixedly installed inside the mounting frame 22-1. Diaphragms 22-3 are symmetrically arranged on both sides of the permeable trough plate 22-2. The diaphragms 22-3 are fixedly connected to the inner wall of the mounting frame 22-1, forming a diaphragm cavity 222 between the two diaphragms 22-3. A filtration cavity 221 is formed on the side of the diaphragm 22-3 away from the permeable trough plate 22-2. 2 is a two-way permeable structure with a feed channel in the center. Filter cloth 22-4 is fixedly installed at both ends of the feed channel by filter cloth clamps. The mounting frame 22-1, permeable trough plate 22-2, diaphragm 22-3, and filter cloth 22-4 are all conventional structures (the mounting frame 22-1 is made of elastic material) and are connected using technical means known to those skilled in the art. Coal slurry water passes through the filter cloth 22-4, and sewage is discharged from the drainage hole at the bottom of the mounting plate 22-1, while sludge remains in the filter chamber 221. The clamping component includes a hydraulic cylinder 24, which is fixedly mounted on the frame 1 in a horizontal direction. A clamping plate 25 is fixedly mounted on the output end of the hydraulic cylinder 24. The clamping plate 25 can be moved by the hydraulic cylinder 24, thereby pushing multiple sets of filter plates 22 to move in a direction close to the thrust plate 23, and clamping the multiple sets of filter plates 22. After clamping, the mounting frames 22-1 of the filter plates 22 undergo elastic deformation under the action of clamping force. During operation, starting the hydraulic cylinder 24 drives the clamping plate 25 closer to the filter plate 22, thereby pushing multiple sets of filter plates 22 to move in the direction close to the thrust plate 23. The thrust plate 23 and the clamping plate 25 clamp the multiple sets of filter plates 22. A counter-pressure mechanism 5 is provided between the thrust plate 23 and the filter plates 22. The transfer plate 53 in the counter-pressure mechanism 5 abuts against the filter plate 22 closest to it. Subsequently, coal slurry is conveyed through the feeding mechanism 3. The coal slurry passes through multiple filter plates 22, and the sludge is blocked in the filter chamber 221 to form a filter cake. The hydraulic cylinder 24 is connected to the hydraulic system, which can apply pressure in stages from low to high, that is, first provide low pressure for feeding and filling, and then provide medium pressure for preliminary pressing. Finally, the pressure is switched to ultra-high pressure for deep pressing. After pressing, high-pressure gas is delivered to the diaphragm chamber 222 through the air intake mechanism 4. The diaphragm 22-3 expands outward to press the filter cake (diaphragm pressing technology is well known to those skilled in the art). When the air intake mechanism 4 is started, the high-pressure gas also enters the pushing component 52 of the counter-pressure mechanism 5, so that the pushing component 52 can push the transfer plate 53 closer to the filter plate 22 and squeeze the filter plate 22, applying a reverse thrust to the filter plate 22, so that the filter plates 22 are further compressed, reducing the effective volume in the filter chamber 221, thereby increasing the pressing force on the filter cake, enhancing the pressing effect of diaphragm pressing on the filter cake, and achieving more thorough dehydration.

[0019] In a preferred embodiment, such as Figure 3 and Figure 4 As shown, the feeding mechanism 3 includes a first feeding pipe 31, a second feeding pipe 32 and a high-pressure hose 33. The first feeding pipe 31 is fixedly inserted through the thrust plate 23 and the fixed base plate 51 in the horizontal direction. The second feeding pipe 32 is fixedly inserted through the transfer plate 51 in the horizontal direction. The high-pressure hose 33 is fixedly connected between the first feeding pipe 31 and the second feeding pipe 32 through a flange.

[0020] In this embodiment, both the first feed pipe 31 and the second feed pipe 32 are made of rigid materials, such as stainless steel. The first feed pipe 31 is connected to the coal slurry water storage tank through a conveying pipe, and the water is pumped into the first feed pipe 31, and then conveyed into the filter plate 22 through the high-pressure hose 33 and the second feed pipe 32 to complete the feeding. The high-pressure hose 33 is made of soft material and has a certain length. During the diaphragm pressing process, the position of the transfer plate 51 moves. The high-pressure hose 33 can ensure that the transfer plate 51 pushes the filter plate 22 to produce the maximum displacement. The high-pressure hose 33 compensates for this displacement difference through its own bending deformation.

[0021] In a preferred embodiment, such as Figure 1As shown, the intake mechanism 4 includes an intake manifold 41, one end of which is connected to an external air supply mechanism, and multiple intake branch pipes 42 are connected to the intake manifold 41. The diaphragm cavity 222 is connected to the intake manifold 41 through the intake branch pipes 42. The intake manifold 41 is also equipped with a diaphragm intake valve and a diaphragm exhaust valve.

[0022] In this embodiment, the main air inlet pipe 41 is also equipped with a diaphragm air inlet valve and a diaphragm air outlet valve (not shown in the figure). By opening the diaphragm air inlet valve, the diaphragm pressing (secondary pressing) is started, and high-pressure gas enters the diaphragm chamber 222, causing the diaphragm 22-3 to expand outward, and the filter cake between the filter plates 22 is pressed again to further remove the moisture in the filter cake. After the diaphragm pressing is completed, the diaphragm air outlet valve is opened to exhaust the gas. Controlling the air intake and exhaust through the diaphragm air inlet valve and the diaphragm air outlet valve is a well-known fact among those skilled in the art.

[0023] In a preferred embodiment, such as Figure 4 and Figure 8 As shown, an annular flow channel 511 is provided in the fixed base plate 51, and the annular flow channel 511 is connected to the air intake manifold 41 through the connecting pipe 512.

[0024] In this embodiment, after the diaphragm inlet valve is opened, high-pressure gas simultaneously enters the annular flow channel 511.

[0025] Preferred, such as Figure 4 and Figure 7 As shown, the pushing assembly 52 includes cylinders 521. Multiple cylinders 521 are fixedly connected in a circular array on the side of the fixed base plate 51 away from the thrust plate 23. The cylinders 521 are arranged in a horizontal direction, and a piston plate 522 is slidably sleeved inside them. The piston plate 522 seals the inside of the cylinders 521 to form a first inner cavity and a second inner cavity. The first inner cavity is connected to the annular flow channel 511. A piston rod 523 is slidably sleeved in the second inner cavity. One end of the piston rod 523 is fixedly connected to the piston plate 522, and the other end is fixedly connected to the transfer plate 53.

[0026] In this embodiment, four cylinders 521 are provided, and the four cylinders 521 are arranged in a circular array to improve the uniformity of force on the transmission plate 53 and improve the stability of its pushing process. The gas in the annular flow channel 511 flows into the first inner cavity of the cylinder 521 at an instantaneous speed almost synchronously. The high-pressure gas pushes the piston plate 522 to move in the direction close to the transfer plate 53, pushing the transfer plate 53 to further squeeze the filter plate 22, providing a reverse force to the filter plate 22, causing the filter plate 22 to move inward and away from the transfer plate 53, reducing the effective volume in the filter cavity 221, further increasing the pressing force on the filter cake, and improving the pressing effect on the filter plate.

[0027] The transfer plate 53 has a wear-resistant layer on the side near the filter plate 22 to extend the service life of the transfer plate 53.

[0028] In a preferred embodiment, such as Figure 4 and Figure 9 As shown, a sealing ring is fixedly fitted on the outer ring of the piston plate 522, and the outer ring of the sealing ring is in contact with the inner wall of the cylinder 521.

[0029] In this embodiment, the sealing ring is selected from high-pressure sealing rings suitable for reciprocating motion, such as Glyd rings or Step seals.

[0030] In a preferred embodiment, such as Figure 4 As shown, it also includes a reset mechanism 6. The reset mechanism 6 includes multiple telescopic rods fixedly arranged horizontally between the fixed base plate 51 and the transfer plate 53. A reset spring 61 is sleeved on the outside of the telescopic rods. One end of the reset spring 61 is fixedly connected to the fixed base plate 51, and the other end is fixedly connected to the transfer plate 53. The elastic force of the reset spring 61 can pull the transfer plate 53 to move away from the filter plate 22.

[0031] In this embodiment, before diaphragm pressing, the elastic force of the return spring 61 pulls the transfer plate 53, causing the transfer plate 53 to abut against the end of the cylinder 521. During diaphragm pressing, the return spring 61 is stretched and undergoes elastic deformation. After diaphragm pressing is completed, the gas in the cylinder 521 is discharged, and the elastic force of the return spring 61 drives the transfer plate 53 to approach the cylinder 521, causing the transfer plate 53 to abut against the end of the cylinder 521 again, thus achieving reset.

[0032] In the description of this specification, the terms "connection," "installation," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0033] In the description of this specification, the terms "one embodiment," "some embodiments," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0034] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A tiered ultra-high pressure filter press, characterized in that, include: frame; The filter press mechanism includes two main beams fixedly mounted on the frame in a horizontal direction. The two main beams are arranged side by side, and multiple sets of filter plates are slidably arranged between the two main beams along their length. A thrust plate is fixedly mounted on one end of each main beam, and a pressing member is mounted on the other end. The pressing member can push the multiple sets of filter plates to move and press them together. The filter plates are provided with a filter chamber for forming a filter cake and a diaphragm chamber for diaphragm pressing. The feeding mechanism is connected to multiple sets of filter chambers and is used to transport coal slurry water into the multiple sets of filter chambers in sequence, and form filter cake in the filter chambers. An air intake mechanism, connected to multiple sets of diaphragm chambers, is used to deliver high-pressure fluid into the multiple sets of diaphragm chambers to perform diaphragm pressing on the filter cake; A back pressure mechanism is disposed between the thrust plate and the filter plate, including a fixed base plate fixedly disposed on the thrust plate, a pushing component disposed on the fixed base plate, a transfer plate connected to the pushing component, the side of the transfer plate near the filter plate abutting against the filter plate, and the pushing component being connected to the air intake mechanism for pushing the transfer plate to move in a direction close to the filter plate and press against the filter plate.

2. The tiered ultra-high pressure filter press according to claim 1, characterized in that, The feeding mechanism includes a first feeding pipe, a second feeding pipe, and a high-pressure hose. The first feeding pipe is fixedly inserted through the thrust plate and the fixed base plate in a horizontal direction. The second feeding pipe is fixedly inserted through the transfer plate in a horizontal direction. The high-pressure hose is fixedly connected between the first feeding pipe and the second feeding pipe through a flange.

3. The tiered ultra-high pressure filter press according to claim 1, characterized in that, The air intake mechanism includes an air intake manifold, one end of which is connected to an external air supply mechanism, and multiple air intake branch pipes are connected to the air intake manifold. The diaphragm cavity is connected to the air intake manifold through the air intake branch pipes. The main intake pipe is also equipped with a diaphragm intake valve and a diaphragm exhaust valve.

4. The tiered ultra-high pressure filter press according to claim 3, characterized in that, An annular flow channel is formed inside the fixed base plate, and the annular flow channel is connected to the main air intake pipe through a connecting pipe.

5. A tiered ultra-high pressure filter press according to claim 4, characterized in that, The pushing assembly includes cylinders. Multiple cylinders are fixedly connected in a circular array on the side of the fixed base plate away from the thrust plate. The cylinders are arranged in a horizontal direction, and a piston plate is slidably sleeved inside them. The piston plate seals the inside of the cylinders to form a first inner cavity and a second inner cavity. The first inner cavity is connected to the annular flow channel. A piston rod is slidably sleeved in the second inner cavity. One end of the piston rod is fixedly connected to the piston plate, and the other end is fixedly connected to the transfer plate.

6. The tiered ultra-high pressure filter press according to claim 5, characterized in that, A sealing ring is fixedly fitted on the outer ring of the piston plate, and the outer ring of the sealing ring is in contact with the inner wall of the cylinder.

7. A tiered ultra-high pressure filter press according to claim 1, characterized in that, It also includes a reset mechanism, which includes multiple telescopic rods fixedly arranged horizontally between the fixed base plate and the transfer plate. A reset spring is sleeved on the outside of the telescopic rod. One end of the reset spring is fixedly connected to the fixed base plate and the other end is fixedly connected to the transfer plate. The elastic force of the reset spring can pull the transfer plate to move away from the filter plate.

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