Diaphragm flow-through double-effect filter press

Abstract

This utility model relates to a diaphragm-through-flow double-effect filter press, belonging to the field of filter presses. The technical solution is as follows: a diaphragm-through-flow double-effect filter press includes multiple diaphragm plates and multiple core plates, with material distribution gaps formed between adjacent diaphragm plates and core plates. It also includes a double-effect pipeline, comprising a main pipe, one end of which branches into an air inlet pipe and a drain pipe. Each diaphragm plate has a first channel located at its upper part, with its first end connected to the material distribution gap and its second end connected to the main pipe. Each core plate has a second channel located at its lower part, with its first end connected to the material distribution gap and its second end connected to a drain pipe or drain trough. This solution, based on the principle of a diaphragm filter press, further incorporates an air-through-flow function to achieve secondary dehydration, significantly improving filtration efficiency compared to traditional single-diaphragm filter presses.

Description

Technical Field

[0001] This utility model relates to the field of filter presses, and in particular to a diaphragm cross-flow double-effect filter press. Background Technology

[0002] Filter presses, as highly efficient solid-liquid separation equipment, are widely used in various industries due to their excellent separation effect and strong adaptability. In the coal industry, a large amount of coal slime is generated during coal washing. This slime has a high water content and is in a slurry state. Directly stockpiling it not only occupies a lot of space but also may cause environmental pollution due to rainwater runoff, while also wasting coal resources. Filter presses apply pressure to force the water in the coal slime through a filter cloth, forming a filter cake with a lower moisture content. This filter cake is easy to transport and store and can be used as fuel for power generation, heating, etc., realizing the resource utilization of coal slime and reducing waste emissions.

[0003] Filter presses typically employ diaphragm filtration, as disclosed in patent CN118925307A. This includes spaced diaphragm plates and core plates. An external pressurizing device fixes the spacing between the diaphragm plates and core plates. Material is filled between the diaphragm plates and core plates. During this process, the water in the material is initially squeezed out by the feeding pressure. Then, the feeding is stopped, and high-pressure gas or liquid is injected into the diaphragm of the diaphragm plate. The diaphragm expands, further squeezing the material and causing further water to be released. Then, the pressurizing device is released, the diaphragm plates and core plates separate, and the sludge cake between them falls out.

[0004] In the aforementioned diaphragm filter press, because the diaphragm is elastically compressed, the filter cake still contains some moisture, and the filtration effect needs to be further improved. Summary of the Invention

[0005] In order to further improve the filtration effect of diaphragm filter press, this utility model provides a diaphragm cross-flow double-effect filter press.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a diaphragm through-flow double-effect filter press, comprising multiple diaphragm plates and multiple core plates, wherein the diaphragm plates and core plates are arranged at intervals and parallel to each other, and a material distribution gap is formed between adjacent diaphragm plates and core plates; the press also includes a double-effect pipeline, wherein the double-effect pipeline includes a main pipe, one end of which branches into an air inlet pipe and a drain pipe, and the drain pipe is provided with a first valve; the diaphragm plates are provided with a first channel located at the upper part of the diaphragm plates, the first end of which connects to the material distribution gap, and the second end of which connects to the main pipe; the core plates are provided with a second channel located at the lower part of the core plates, the first end of which connects to the material distribution gap, and the second end of which connects to the drain pipe or a drain trough. This solution is based on the principle of diaphragm filter press, and further incorporates an airflow function. During diaphragm filtration, the first and second channels serve as drainage channels. After diaphragm filtration is completed, airflow is introduced into the mud cake in the gap between the cloth using the first channel of the diaphragm plate. The airflow passes through the mud cake and is discharged through the second channel, simultaneously carrying away the moisture in the mud cake, thus achieving secondary dewatering. This significantly improves the filtration efficiency compared to traditional single diaphragm filter presses. At the same time, this filter press basically utilizes the structure of traditional diaphragm filter presses, resulting in low modification and operating costs.

[0007] As a preferred embodiment of a diaphragm through-flow double-effect filter press, the main pipe is horizontally arranged, the drain pipe extends downwards from the main pipe, and the air inlet pipe extends upwards from the main pipe. The air inlet pipe being located above the main pipe prevents moisture from entering the air inlet pipe and affecting the air supply, while ensuring sufficient moisture outflow during diaphragm filtration.

[0008] As a preferred implementation of a diaphragm through-flow double-effect filter press, the second end of the second channel is open and located above the drainage trough. Drainage can fall directly into the drainage trough without additional piping, simplifying the drainage path, reducing pipe blockage problems, lowering equipment failure rates, reducing resistance, improving the efficiency of secondary dewatering, and also reducing equipment maintenance costs.

[0009] In a preferred embodiment of a diaphragm through-flow double-effect filter press, the lower end of the drain pipe is located above the drain trough. This facilitates centralized collection and treatment of the wastewater, improving the overall ease of operation.

[0010] As a preferred implementation of a diaphragm through-flow double-effect filter press, a second valve is provided on the air inlet pipe. This second valve allows for precise control of the air intake, enabling flexible adjustment of the flow time based on the cake's condition. This makes the secondary dewatering more adaptable to different material characteristics, improving dewatering efficiency while avoiding energy waste and further enhancing the equipment's operational economy.

[0011] As a preferred embodiment of a diaphragm through-flow double-effect filter press, the first channel is L-shaped, with its first end located in the working surface of the diaphragm plate and its second end located on the top edge of the diaphragm plate. The L-shaped structure allows for a more compact channel layout within the diaphragm plate, ensuring that the first end can directly supply airflow into the filter cake within the material distribution gap, improving flow efficiency, while also facilitating connection of the second end to the main pipe, reducing pipeline space requirements, and without affecting the normal pressing function of the diaphragm plate.

[0012] As a preferred implementation of a diaphragm through-flow double-effect filter press, the second channel is L-shaped, with its first end located in the working surface of the core plate and its second end located on the side edge of the core plate. The L-shaped design allows the second channel to be positioned closer to the bottom of the filter cake, facilitating efficient collection of the water-laden airflow after through-flow and improving drainage efficiency. Simultaneously, the outlet position on the side edge facilitates connection to a drainage trough or other pipelines, optimizing the overall equipment layout.

[0013] As a preferred implementation of a diaphragm through-flow double-effect filter press, each diaphragm plate has two first channels, each located at one of the two apex corners of the diaphragm plate. This dual-channel design allows airflow to enter simultaneously from both sides of the upper part of the filter cake, significantly increasing the contact area between the airflow and the filter cake, resulting in more uniform airflow distribution. This avoids the problem of insufficient localized dewatering, further improving the efficiency and effect of secondary dewatering and shortening the overall filter press cycle.

[0014] As can be seen from the above technical solutions, the beneficial effects of this utility model are as follows: This diaphragm cross-flow double-effect filter press, by adding an air cross-flow function, achieves secondary dehydration on the basis of traditional diaphragm filtration, significantly improving the filtration efficiency. Furthermore, relying on the modification of the traditional structure, the operating cost is low. The layout design of the main pipe and the inlet and outlet pipes avoids the impact of filtered water on the air supply, ensuring sufficient water outflow. The open setting of the second channel and the design of the lower end of the drain pipe being located above the drain trough simplify the drainage path, reduce blockages and malfunctions, lower maintenance costs, and improve operational convenience and secondary dehydration efficiency. The second valve on the air inlet pipe can precisely control the air intake, adapting to different material characteristics, improving the dehydration effect and avoiding energy waste, thus improving economy. The L-shaped first and second channel design makes the layout more compact, ensuring efficient airflow and water collection without affecting the pressing function, optimizing the overall equipment layout. The double first channel design on the diaphragm plate increases the contact area between the airflow and the filter cake, making the airflow distribution more uniform, avoiding insufficient local dehydration, further improving the efficiency and effect of secondary dehydration, and shortening the filtration cycle. Attached Figure Description

[0015] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a structural schematic diagram of a specific embodiment of the present utility model.

[0017] Explanation of main figure symbols 1. Diaphragm plate, 11. First channel, 2. Core plate, 21. Second channel, 3. Fabric gap, 4. Main pipe, 5. Drain pipe, 6. Air inlet pipe, 7. Drainage groove, 8. First valve, 9. Second valve. Detailed Implementation

[0018] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0019] A diaphragm-through-flow double-effect filter press includes multiple diaphragm plates 1 and multiple core plates 2. The diaphragm plates 1 and the core plates 2 are arranged at intervals and parallel to each other, forming a material distribution gap 3 between adjacent diaphragm plates 1 and core plates 2, in which the filter cake is placed. It also includes a double-effect pipeline, comprising a main pipe 4, which is horizontally positioned, with one end branching into an air inlet pipe 6 and a drain pipe 5. The drain pipe 5 extends downwards from the main pipe 4 and is equipped with a first valve 8. This design conforms to the natural law of water flowing downhill, facilitating smooth water discharge during the filter press process. The lower end of the drain pipe 5 is located above a drain trough 7, allowing water to be directly discharged into the drain trough 7 for convenient centralized collection and treatment, improving operational convenience. The air inlet pipe 6 extends upwards from the main pipe 4, preventing filter cake from entering the air inlet pipe 6 and affecting the air supply. It is equipped with a second valve 9, which can precisely control the opening and closing of the air intake and the air intake volume. It can be flexibly adjusted according to the state of the mud cake, adapt to different material characteristics, improve the dewatering effect while avoiding energy waste and improving economy. Meanwhile, the diaphragm plate 1 is provided with a first channel 11, which is located at the upper part of the diaphragm plate 1 and is L-shaped. This structure makes the channel layout compact and does not affect the normal pressing function of the diaphragm plate 1. The first end of the first channel 11 is located in the working surface (i.e., the surface where the material is squeezed) of the diaphragm plate 1 and connects to the cloth gap 3, ensuring that airflow can be directly introduced into the mud cake and improving the flow efficiency. The second end of the first channel 11 is located on the top edge of the diaphragm plate 1 and connects to the main pipe 4. On each diaphragm plate 1, there are two first channels 11, which are located at the two top corners of the diaphragm plate 1 respectively. This allows the airflow to enter from both sides of the upper part of the mud cake at the same time, increasing the contact area between the airflow and the mud cake, making the airflow distribution more uniform, avoiding insufficient local dehydration, improving the efficiency and effect of secondary dehydration, and shortening the filter press cycle. The core plate 2 is provided with a second channel 21, which is located at the lower part of the core plate 2 and is L-shaped. This design allows the second channel 21 to be closer to the bottom of the mud cake, facilitating efficient collection of the airflow carrying moisture after passing through, thus improving drainage efficiency. The first end of the second channel 21 is located in the working surface of the core plate 2 and connects to the fabric gap 3. The second end of the second channel 21 is located on the side edge of the core plate 2 and connects to the drain pipe 5 or the drain trough 7. The second end of the second channel 21 is open and located above the drain trough 7, eliminating the need for additional connecting pipes, simplifying the drainage path, reducing the risk of blockage, lowering the equipment failure rate and maintenance costs, reducing resistance, and improving secondary dewatering efficiency.Its working process is as follows: during diaphragm filtration, the first channel 11 and the second channel 21 serve as drainage channels, through which water is discharged into the drainage tank 7 via the drainage pipe 5. After the diaphragm filtration is completed, airflow is introduced into the mud cake in the cloth gap 3 through the air inlet pipe 6, the main pipe 4, and the first channel 11. The airflow passes through the mud cake, carrying the water in it, and is discharged from the second channel 21 to the drainage tank 7, achieving secondary dewatering. Compared with the traditional single diaphragm filter press, it greatly improves the filtration efficiency. Moreover, this filter press basically utilizes the structure of the traditional diaphragm filter press, resulting in low modification and usage costs.

[0020] As can be seen from the above embodiments, the advantages of this utility model are as follows: This solution adds an airflow function to the traditional diaphragm filter press, thereby achieving secondary dehydration. This not only significantly improves the filter press efficiency, but also, because it is based on a modification of the traditional structure, the operating cost is relatively low. The layout of the main pipe, air inlet pipe, and drain pipe is very reasonable, effectively avoiding the impact of moisture generated during filter press on the air supply, while ensuring that moisture can flow out fully. The second channel adopts an open design, and the lower end of the drain pipe is located above the drain trough. This design simplifies the drainage path, reduces blockages and equipment failures, lowers maintenance costs, and also improves the ease of operation and secondary dehydration efficiency. The second valve on the air inlet pipe can precisely control the air intake and can be flexibly adjusted according to the characteristics of different materials, improving the dehydration effect while avoiding energy waste and enhancing the economic efficiency of equipment operation. Both the first and second channels are L-shaped designs, making the layout more compact. This ensures efficient airflow and effective moisture collection without affecting the pressing function, optimizing the overall layout of the equipment. In addition, the two first channels set on the diaphragm plate increase the contact area between the airflow and the sludge cake, making the airflow distribution more uniform, preventing the problem of insufficient local dehydration, further improving the efficiency and effect of secondary dehydration, and shortening the filter press cycle.

[0021] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A diaphragm-through double-effect filter press, comprising a plurality of diaphragm plates (1) and a plurality of core plates (2), wherein the diaphragm plates (1) and the core plates (2) are arranged at intervals and parallel to each other, and a fabric gap (3) is formed between adjacent diaphragm plates (1) and core plates (2), characterized in that, It also includes a dual-effect pipe, which includes a main pipe (4), one end of which branches into an air inlet pipe (6) and a drain pipe (5), and the drain pipe (5) is provided with a first valve (8); the diaphragm plate (1) is provided with a first channel (11), which is located at the upper part of the diaphragm plate (1), the first end of the first channel (11) is connected to the fabric gap (3), and the second end of the first channel (11) is connected to the main pipe (4); the core plate (2) is provided with a second channel (21), which is located at the lower part of the core plate (2), the first end of the second channel (21) is connected to the fabric gap (3), and the second end of the second channel (21) is connected to the drain pipe (5) or the drain trough (7).

2. The diaphragm cross-flow double-effect filter press according to claim 1, characterized in that, The main pipe (4) is set horizontally, the drain pipe (5) extends below the main pipe (4), and the air inlet pipe (6) extends above the main pipe (4).

3. The diaphragm cross-flow double-effect filter press according to claim 1, characterized in that, The second end of the second channel (21) is open and located above the drain trough (7).

4. The diaphragm cross-flow double-effect filter press according to claim 2, characterized in that, The lower end of the drain pipe (5) is located above the drain trough (7).

5. The diaphragm cross-flow double-effect filter press according to claim 1, characterized in that, The air intake pipe (6) is equipped with a second valve (9).

6. The diaphragm cross-flow double-effect filter press according to claim 1, characterized in that, The first channel (11) is L-shaped, with the first end of the first channel (11) located in the working surface of the diaphragm plate (1) and the second end of the first channel (11) located on the top edge of the diaphragm plate (1).

7. The diaphragm cross-flow double-effect filter press according to claim 1, characterized in that, The second channel (21) is L-shaped. The first end of the second channel (21) is located in the working surface of the core plate (2), and the second end of the second channel (21) is located on the side edge of the core plate (2).

8. The diaphragm cross-flow double-effect filter press according to claim 1, characterized in that, On each of the diaphragm plates (1), there are two first channels (11), and the two first channels (11) are respectively located at the two top corners of the diaphragm plate (1).

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