Filter press filter plate heating structure

Abstract

The utility model discloses a filter press filter plate heating structure, including the outer frame body, be equipped with the filter plate main part on the outer frame body, be equipped with the cavity in the filter plate main part, just the phase change material layer is filled in the cavity, just be equipped with the zigzag steam pipe in the phase change material layer, just the steam inlet pipe and steam outlet pipe of steam pipe's both ends screw thread installation are projected outside the outer frame body, just the surface of filter plate main part is equipped with the graphene heat conduction layer, the utility model discloses by the high temperature gas to steam pipe and pass in the heating of phase change material, steam pipe directly pass in high temperature steam and realize quick heating, and phase change material layer absorbs / release a large number of latent heat at specific temperature point, fill up the temperature gap caused by steam pressure fluctuation, make filter plate surface temperature difference control in the + 2 DEG C, avoid filter cake partial over dry or uneven moisture content, improve separation consistency.

Description

Technical Field

[0001] This utility model relates to the technical field of filter plates for filter presses, specifically a heating structure for filter plates in a filter press. Background Technology

[0002] A filter press is a general-purpose mechanical device used for solid-liquid separation. It uses physical methods to separate solid-liquid mixtures. Based on the way the filter cake is formed, it can be divided into box filter presses and plate and frame filter presses. The filtration unit of a plate and frame filter press consists of a filter plate and a filter frame. A filter press consists of multiple filtration units arranged in sequence, and the filter cake is formed inside the filter frame.

[0003] A filter press typically consists of multiple filtration units, a thrust plate, a clamping plate, a main beam, a clamping device, and a main beam connecting bracket. Large filter presses often use hydraulic cylinders for clamping, while small filter presses often use screw-type clamping. The filter plate of a filter press serves as both a support frame for the filter media (filter cloth or filter paper) and a filtrate collector. Its perimeter is a sealing surface, and the two sides in the middle are machined with support points for the filter media. These support points are mostly cylindrical or elongated protrusions; the protruding parts support the filter media, while the recessed parts form filtrate channels, facilitating the collection of dispersed filtrate to the filtrate outlet for outflow. Many high-viscosity materials (such as chemical slurries and food processing waste) have poor flowability at room temperature, resulting in slow filtration speeds and high energy consumption. Heating the filter plate can raise the material temperature, reduce viscosity, and thus accelerate the speed at which the liquid passes through the filter cloth, shortening the filtration cycle.

[0004] Existing conventional filter plate heating mechanisms use resistance wires for heating. However, resistance elements are usually arranged locally (such as at the edge or in a specific area), which can easily cause uneven heating of the filter plate, large temperature difference between the center and the edge, large filter plate volume, high heat capacity, slow heating and need for continuous power supply to maintain the temperature, resulting in a significant increase in power consumption and high long-term operating costs. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this utility model provides a filter plate heating structure for a filter press.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: This utility model discloses a filter plate heating structure for a filter press, comprising an outer frame, on which a filter plate body is provided. The filter plate body is characterized in that a cavity is provided inside, and the cavity is filled with a phase change material layer. A tortuous steam pipe is provided in the phase change material layer, and steam inlet and steam outlet pipes extending out of the outer frame are threaded at both ends of the steam pipe. Furthermore, a graphene thermally conductive layer is provided on the surface of the filter plate body.

[0007] As a preferred technical solution of this utility model, the filter plate body includes an outer frame, and a panel is provided on both sides of the outer frame. The panel and the outer frame form a cavity, and the panel and the outer frame are fully welded together. The filter plate body is also fully welded to the outer frame.

[0008] As a preferred embodiment of this invention, the graphene thermally conductive layer is disposed on both sides of the panel.

[0009] As a preferred technical solution of this utility model, the outer frame is provided with an inwardly recessed groove, and the outer frame is provided with a through hole for the end of the steam pipe to pass through at the groove. The end of the steam pipe is threadedly installed with a sealing cover plate for contacting the outer frame, and a sealing ring is provided between the sealing cover plate and the outer frame.

[0010] As a preferred embodiment of this utility model, the two ends of the steam pipe are equipped with connecting pipes with internal threads; the steam inlet pipe and the steam outlet pipe are threadedly connected to the connecting pipes.

[0011] As a preferred embodiment of this utility model, the outer frame is provided with a reinforcing crossbar, the thickness of which is less than the thickness of the outer frame, so that a flow gap is formed between the reinforcing crossbar and the panel.

[0012] The beneficial effects of this utility model are: 1. The filter plate of this filter press with a heating structure has a cavity inside, which is filled with a phase change material layer. A tortuous steam pipe is installed in the phase change material layer. This allows the phase change material to be heated by introducing high-temperature gas into the steam pipe. The steam pipe directly introduces high-temperature steam to achieve rapid heating. The phase change material layer absorbs / releases a large amount of latent heat at a specific temperature point, filling the temperature gap caused by steam pressure fluctuations. This keeps the temperature difference on the filter plate surface within ±2℃, avoiding localized over-drying or uneven moisture content of the filter cake and improving separation consistency. The heat storage characteristics of the phase change material layer can buffer the effect of steam pressure fluctuations on temperature, making it especially suitable for temperature-sensitive materials.

[0013] 2. The filter plate body of this filter press with filter plate heating structure is specially designed to facilitate the installation of the phase change material layer and steam pipe. Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of a filter plate heating structure for a filter press according to the present invention; Figure 2This is a schematic diagram of the main body of the filter plate of a filter press filter plate heating structure according to the present invention; Figure 3 This is a schematic diagram of the phase change material layer in the filter plate heating structure of a filter press according to this utility model; Figure 4 This is a schematic diagram of the outer frame of a filter plate heating structure for a filter press according to this utility model.

[0015] In the diagram: 1. Outer frame; 2. Filter plate body; 3. Cavity; 4. Phase change material layer; 5. Steam pipe; 6. Steam inlet pipe; 7. Steam outlet pipe; 8. Graphene thermal conductive layer; 9. Outer frame; 10. Panel; 11. Groove; 12. Through hole; 13. Sealing cover plate; 14. Sealing ring; 15. Connecting pipe; 16. Reinforcing crossbar. Detailed Implementation

[0016] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0017] Example: Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, this utility model discloses a filter plate heating structure for a filter press, comprising an outer frame 1, on which a filter plate body 2 is provided. The filter plate body 2 is characterized in that a cavity 3 is provided inside, and the cavity 3 is filled with a phase change material layer 4. A tortuous steam pipe 5 is provided inside the phase change material layer 4, and steam inlet pipe 6 and steam outlet pipe 7 extending out of the outer frame 1 are threaded at both ends of the steam pipe 5. A graphene thermally conductive layer 8 is provided on the surface of the filter plate body 2. The cavity 3 is filled with a phase change material layer 4, and a tortuous steam pipe 5 is provided inside the phase change material layer 4. This allows the phase change material to be heated by introducing high-temperature gas into the steam pipe 5. The steam pipe 5 directly introduces high-temperature steam to achieve rapid heating. The phase change material layer 4 absorbs / releases a large amount of latent heat at a specific temperature point, filling the temperature gap caused by steam pressure fluctuations. This keeps the temperature difference on the filter plate surface within ±2℃, preventing the filter cake from being too dry in some areas or having uneven moisture content, thus improving separation consistency. The heat storage characteristics of the phase change material layer 4 can buffer the effect of steam pressure fluctuations on temperature, making it especially suitable for temperature-sensitive materials.

[0018] The filter plate body 2 includes an outer frame 9, and each side of the outer frame 9 is provided with a panel 10. The panel 10 and the outer frame 9 enclose a cavity 3, and the panel 10 and the outer frame 9 are fully welded together. The filter plate body 2 is also fully welded to the outer frame 1. This special design of the filter plate body 2 facilitates the installation of the phase change material layer and the steam pipe 5.

[0019] The graphene thermal conductive layer 8 is disposed on both sides of the panel 10, and the good thermal conductivity of the graphene thermal conductive layer 8 is used to make the heat distribution uniform.

[0020] The outer frame 9 has an inwardly recessed groove 11 and a through hole 12 for the end of the steam pipe 5 to pass through at the groove 11. The end of the steam pipe 5 is threadedly fitted with a sealing cover plate 13 for contacting the outer frame 9. A sealing ring 14 is provided between the sealing cover plate 13 and the outer frame 9. This facilitates the installation of the steam pipe and seals the connection with the sealing cover plate 13, thereby ensuring a good sealing effect. The outer frame 9 also has an injection pipe that communicates with the cavity for injecting the phase change material layer into the cavity. Space is left in the cavity to facilitate the thermal expansion and contraction of the phase change material layer. A cap is installed at the end of the injection pipe for sealing.

[0021] The steam pipe 5 has connecting pipes 15 with internal threads installed at both ends; the steam inlet pipe 6 and the steam outlet pipe 7 are threadedly connected to the connecting pipes 15, which facilitates installation and disassembly.

[0022] The outer frame 9 is provided with a reinforcing crossbar 16. The thickness of the reinforcing crossbar 16 is less than the thickness of the outer frame 9, so that a flow gap is formed between the reinforcing crossbar 16 and the panel 10. This makes the outer frame less prone to deformation, thus having a better load-bearing capacity.

[0023] Working principle: The filter plate heating structure of this filter press has a cavity 3 filled with a phase change material layer 4, and a tortuous steam pipe 5 is provided in the phase change material layer 4. This allows the phase change material to be heated by introducing high-temperature gas into the steam pipe 5. The steam pipe 5 directly introduces high-temperature steam to achieve rapid heating. The phase change material layer 4 absorbs / releases a large amount of latent heat at a specific temperature point, filling the temperature gap caused by steam pressure fluctuations. This keeps the temperature difference on the filter plate surface within ±2℃, avoiding localized over-drying or uneven moisture content of the filter cake and improving separation consistency. The heat storage characteristics of the phase change material layer 4 can buffer the effect of steam pressure fluctuations on temperature, making it especially suitable for temperature-sensitive materials.

[0024] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A filter plate heating structure for a filter press, comprising an outer frame (1), wherein a filter plate body (2) is provided on the outer frame (1), characterized in that, The filter plate body (2) has a cavity (3) inside, and the cavity (3) is filled with a phase change material layer (4). The phase change material layer (4) has a tortuous steam pipe (5). The two ends of the steam pipe (5) are threaded with a steam inlet pipe (6) and a steam outlet pipe (7) extending out of the outer frame (1). The surface of the filter plate body (2) is provided with a graphene thermal conductive layer (8).

2. The filter plate heating structure for a filter press according to claim 1, characterized in that, The filter plate body (2) includes an outer frame (9), and a panel (10) is provided on both sides of the outer frame (9). The panel (10) and the outer frame (9) enclose a cavity (3), and the panel (10) and the outer frame (9) are fully welded together. The filter plate body (2) and the outer frame (1) are also fully welded together.

3. The filter plate heating structure for a filter press according to claim 2, characterized in that, The graphene thermal conductive layer (8) is disposed on both sides of the panel (10).

4. The filter plate heating structure for a filter press according to claim 2, characterized in that, The outer frame (9) is provided with an inwardly recessed groove (11), and the outer frame (9) is provided with a through hole (12) for the end of the steam pipe (5) to pass through at the groove (11). The end of the steam pipe (5) is threadedly fitted with a sealing cover plate (13) for contacting the outer frame (9), and a sealing ring (14) is provided between the sealing cover plate (13) and the outer frame (9).

5. The filter plate heating structure for a filter press according to claim 1, characterized in that, The steam pipe (5) is fitted with connecting pipes (15) with internal threads at both ends; the steam inlet pipe (6) and the steam outlet pipe (7) are threadedly connected to the connecting pipes (15).

6. The filter plate heating structure for a filter press according to claim 2, characterized in that, The outer frame (9) is provided with a reinforcing crossbar (16), the thickness of which is less than the thickness of the outer frame (9), so that a flow gap is formed between the reinforcing crossbar (16) and the panel (10).

Images