Washing water-saving type filter pressing device

Abstract

The utility model discloses a washing water-saving type filter pressing device, and belongs to the technical field of filter pressing and cleaning. The washing water-saving type filter pressing device comprises a plurality of filter plates A, a plurality of filter frames and a plurality of filter plates B, the filter plates A, the filter frames and the filter plates B are sequentially and circularly arranged in the first direction, the filter plates A, the filter frames and the filter plates B are fixedly combined and are in close contact in the first direction, each filter frame and the adjacent filter plate A and filter plate B are configured to form a filter pressing unit, and the filter pressing units are arranged in the first direction. A filter chamber is defined by the filter frame and the adjacent filter plate A and the adjacent filter plate B. The surfaces, located in the filter chamber, of the filter plate A and the filter plate B are further covered with filter cloth. The washing water-saving type filter pressing device is further provided with a feeding channel used for inputting materials and a liquid inlet and outlet channel used for inputting cleaning liquid and guiding out filtrate / cleaning liquid. And the feeding channel and the liquid inlet and outlet channel are respectively communicated with the filter chambers of the plurality of filter pressing units. Deionized water used in the filter cake washing process can be greatly saved, and time needed in the washing process is shortened.

Description

Technical Field

[0001] This utility model specifically relates to a water-saving pressure filter device for washing, belonging to the field of pressure filter cleaning technology. Background Technology

[0002] When micron-sized metal powders generated by wet reactions (typical examples of micron-sized powders in this patent include silver powder and copper powder used in the photovoltaic industry) are separated into solid and liquid components using a plate and frame filter press, the high purity requirements necessitate repeated rinsing of the filter cake with deionized water to ensure extremely low conductivity. Tests show that this top-feed filter press effectively reduces the amount of washing water used, and the washing process is completed quickly through a special combination of forward and reverse rinsing and center rinsing.

[0003] Traditional center-feed filter presses have the following problems in the washing process because each wash can only cover a small area of ​​the filter cake: ① The washing process takes a long time and uses a lot of water, which affects the production capacity of a single machine; ② The feed inlet is located in the center of the filter plate, and the direction of the washing water flow at this location is uncertain, resulting in dead zones and poor washing effect. Utility Model Content

[0004] The main objective of this invention is to provide a water-saving filter press device for washing, thereby overcoming the shortcomings of the prior art.

[0005] To achieve the aforementioned objectives, the technical solution adopted by this utility model includes:

[0006] This utility model provides a water-saving filter press device for washing, which includes: a filter plate A, a filter frame, and a filter plate B arranged sequentially along a first direction. The filter frame and an adjacent filter plate A and filter plate B together enclose a filter chamber.

[0007] The filter chamber includes a first part and a second part arranged sequentially along a second direction. The filter plate A has a first flow guiding structure, and the filter plate B has a second flow guiding structure. The first flow guiding structure is directly connected to the first part, and the second flow guiding structure is directly connected to the second part.

[0008] Each of the filter plate A, the filter frame, and the filter plate B is provided with a feed hole and multiple liquid inlet / outlet holes. The multiple liquid inlet / outlet holes are arranged around the perimeter of the filter plate A, the filter frame, and the filter plate B. All the feed holes on the filter plate A, the filter frame, and the filter plate B are sequentially connected to form a feed channel. The feed hole on the filter frame is directly connected to the filter chamber. The multiple liquid inlet / outlet holes on the filter plate A, the filter frame, and the filter plate B are respectively sequentially connected to form multiple liquid inlet / outlet channels. Some of the liquid inlet / outlet holes on one side of the filter plate A are directly connected to the first flow guiding structure, and some of the liquid inlet / outlet holes on the other side of the filter plate B are directly connected to the second flow guiding structure. The first direction and the second direction intersect.

[0009] Furthermore, the filter plate A has a first side, the filter plate B has a second side, the first side and the second side together with the filter frame form the filter chamber, the first flow guiding structure is disposed on the first side, and the second flow guiding structure is disposed on the second side.

[0010] Furthermore, the first flow guiding structure is a groove structure disposed on the first surface, and the second flow guiding structure is a groove structure disposed on the second surface.

[0011] Furthermore, the trench structure includes a plurality of trenches arranged side by side along the second direction, and the plurality of trenches are interconnected.

[0012] Furthermore, the first surface includes a first region and a second region arranged sequentially along the second direction, the first flow guiding structure is disposed in the second region, the second surface includes a third region and a fourth region arranged sequentially along the second direction, the second flow guiding structure is disposed in the third region, the first region corresponds to the third region, the first part of the filter chamber is disposed between the first region and the third region, the second region corresponds to the fourth region, and the second part of the filter chamber is disposed between the second region and the fourth region.

[0013] Furthermore, the portion of the liquid inlet and outlet holes on the filter plate A that are directly connected to the first flow guiding structure and the other portion of the liquid inlet and outlet holes that are not directly connected to the first flow guiding structure are arranged opposite to each other on both sides of the filter plate A along the second direction. Similarly, the portion of the liquid inlet and outlet holes on the filter plate B that are directly connected to the second flow guiding structure and the other portion of the liquid inlet and outlet holes that are not directly connected to the second flow guiding structure are arranged opposite to each other on both sides of the filter plate B along the second direction.

[0014] Furthermore, the outer periphery of the filter plate A, the filter frame and the filter plate B are also fixedly provided with handle supports, which are used to assemble the filter plate A, the filter frame or the filter plate B on the bracket.

[0015] Furthermore, the water-saving filter press device also includes: a plurality of filter cloths, which are fixedly disposed on the side of the filter plate A or the filter plate B facing the filter chamber, and the filter cloths completely cover the first flow guiding structure or the second flow guiding structure.

[0016] Furthermore, filter plate A and filter plate B are also provided with fixing pins, and the filter cloth is fixed to filter plate A or filter plate B via the fixing pins.

[0017] Furthermore, the water-saving filter press device also includes a support frame, on which the filter plate A, the filter frame and the filter plate B are assembled.

[0018] Compared with the prior art, the advantages of this utility model include:

[0019] The water-saving filter press device provided in this embodiment of the invention can significantly save deionized water used in the filter cake washing process, reduce the time required for the washing process, and lower the operating cost of the equipment. It also improves the uniformity of the filter cake washing effect. In addition, the operation of the water-saving filter press device provided in this embodiment of the invention is simpler, simplifying the washing steps and improving the cycle time of the equipment.

[0020] This utility model provides a water-saving pressure filter device for washing, which can reduce the number of cycles required during the washing process, save the amount of deionized water, and avoid a series of problems such as slow single-machine cycle and high operating costs caused by long washing time. It ensures low cost and high efficiency in the solid-liquid separation process and can be applied to various powder pressure filter washing occasions. Attached Figure Description

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

[0022] Figure 1 This is a schematic diagram of the overall structure of a water-saving filter press device for washing provided in a typical embodiment of this utility model;

[0023] Figure 2 This is a side view of a water-saving filter press device for washing provided in a typical embodiment of this utility model;

[0024] Figure 3 This is a schematic diagram of the structure of filter plate A in a water-saving filter press device for washing provided in a typical embodiment of this utility model;

[0025] Figure 4 This is a schematic diagram of the structure of filter plate B in a water-saving filter press device for washing, provided in a typical embodiment of this utility model;

[0026] Figure 5 This is a schematic diagram of the filter frame in a water-saving pressure filter device for washing, provided in a typical embodiment of this utility model;

[0027] Figure 6 This is a schematic diagram illustrating the working principle of a water-saving filter press device for washing, provided in a typical embodiment of this utility model. Detailed Implementation

[0028] In view of the shortcomings of the prior art, the inventors of this case, through long-term research and extensive practice, have proposed the technical solution of this utility model. The following will further explain and illustrate the technical solution, its implementation process, and principles in conjunction with the accompanying drawings and specific embodiments. Unless otherwise specified, the filter plate A, filter frame, filter plate B, filter cloth, support, etc., involved in the embodiments of this utility model can all be obtained using conventional processes known in the art. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them.

[0029] This utility model provides a water-saving filter press device for washing, which is mainly composed of filter plate A110, filter plate B130, filter frame 120 and other parts. It has a feeding filter press function, is provided with a liquid outlet hole for filtrate discharge, and has a filter cake washing function. With the help of the liquid inlet valve pipeline, it can realize washing modes such as reverse washing A, reverse washing B, and center washing.

[0030] For a more specific implementation plan, please refer to Figure 1 and Figure 2 A water-saving filter press device for washing includes multiple filter plates A110, multiple filter frames 120, and multiple filter plates B130. The filter plates A110, filter frames 120, and filter plates B130 are arranged sequentially and cyclically along a first direction. The filter plates A110, filter frames 120, and filter plates B130 are fixedly connected and in close contact with each other in the first direction. Each filter frame 120 and an adjacent filter plate A110 or filter plate B130 are configured to form a filter press unit. The filter frame 120 and the adjacent filter plate A110 or filter plate B130 together enclose a filter chamber. The surface of the filter plates A110 and B130 located in the filter chamber is also covered with filter cloth. The water-saving filter press device for washing also has a feed channel for inputting materials and an inlet / outlet channel for inputting cleaning liquid and outputting filtrate / cleaning liquid. The feed channel and the inlet / outlet channel are respectively connected to the filter chambers of the multiple filter press units, wherein the first direction is the axial direction of the water-saving filter press device for washing.

[0031] Specifically, the material can be fed into multiple filter chambers through the feed channel. The solid material in the material is intercepted by the filter cloth and remains in the filter chamber. The mother liquor in the material passes through the filter cloth and enters the inlet and outlet channels, and is then output through the inlet and outlet channels. The cleaning liquid can also pass through the feed channel, multiple filter chambers, and inlet and outlet channels in sequence and then be output to achieve cleaning. The cleaning liquid can also be fed into one or more inlet and outlet channels, pass through multiple filter chambers, and then be output from other inlet and outlet channels.

[0032] The following mainly takes a single filter press unit as an example to introduce its specific structural composition and layout, so that those skilled in the art can understand the overall structure of the water-saving filter press device.

[0033] Please refer to the following for details. Figure 1 and Figure 3 The filter plate A110 has a first surface, which includes a central region and a surrounding region. The central region includes a first region and a second region (the second region is...) that are sequentially arranged and adjacent to each other along a second direction. Figure 3 The second region has multiple grooves arranged side by side along a second direction, each groove extending along a third direction. The multiple grooves are connected to form a first flow guiding structure 111. Specifically, the periphery of the first surface of the filter plate A110 and the first region located in the middle are both continuous and flat planes. The periphery is provided with four liquid inlet / outlet holes 102 and one feed hole 101. The liquid inlet / outlet holes 102 and the feed hole 101 penetrate the filter plate A110 along the thickness direction. The four liquid inlet / outlet holes 102 are respectively located at the four corners of the middle region. The feed hole 101 is located at the top of the middle region along a third direction. The two liquid inlet / outlet holes 102 closest to the second region are also connected to the grooves in the second region via liquid distribution holes.

[0034] Specifically, the second direction intersects with the third direction and is parallel to the first surface. The first direction intersects with the first surface. As a preferred option, the second direction intersects with the third direction perpendicularly, and the first direction intersects with the first surface perpendicularly. It should be noted that the relationship between the first direction, the second direction, and the first surface is in the context of the water-saving filter press device as a whole.

[0035] Please refer to the following for details. Figure 1 and Figure 4 Specifically, filter plate B130 has a second surface, which includes a central region and a surrounding region. The central region includes a third region and a fourth region (the fourth region is...) that are sequentially arranged and adjacent to each other along a second direction. Figure 4The third region has multiple grooves arranged side by side along the second direction, each groove extending along the third direction. The multiple grooves are connected to form a second flow guiding structure 131. Specifically, the four sides of the second surface of the filter plate B130 and the fourth region located in the middle region are continuous and flat planes. The four sides are provided with four liquid inlet / outlet holes 102 and one feed hole 101. The liquid inlet / outlet holes 102 and the feed hole 101 penetrate the filter plate B130 along the thickness direction. The four liquid inlet / outlet holes 102 are respectively located at the four corners of the middle region, and the feed hole 101 is located at the top of the middle region. The two liquid inlet / outlet holes 102 near the third region are also connected to the grooves in the third region through the liquid distribution holes.

[0036] Please refer to the following for details. Figure 1 and Figure 5 The filter frame 120 has an overall annular structure. It has four through-holes 102 for liquid inlet and outlet, and one feed inlet 101. The four through-holes 102 are located at the four corners of the central window 121, and the feed inlet 101 is located at the top of the central window 121. The feed inlet 101 is also connected to the central window 121 via a distribution hole. Specifically, the end face of the filter frame 120 is a continuous and flat plane.

[0037] Specifically, in a single filter press unit, the surrounding areas / parts of filter plates A110 and B130 are in close contact and sealed to the filter frame 120. The first surface of filter plate A110 and the second surface of filter plate B130, together with the filter frame 120, form a filter chamber. As a preferred embodiment, the structure, shape, and size of the surrounding areas of filter plates A110 and B130 are the same as those of the filter frame 120. Furthermore, the four inlet and outlet holes 102 on filter plates A110, B130, and 120 correspond one-to-one and are connected to form four inlet and outlet channels. The feed holes 101 on filter plates A110, B130, and 120 correspond to and are connected to form a feed channel. The four inlet and outlet channels are respectively connected to the filter chamber via the first guide structure 111 and the second guide structure 131. Specifically, in order to ensure the airtightness of the connection between filter plate A110, filter plate B130 and filter frame 120, the contact surfaces of filter plate A110, filter plate B130 and filter frame 120 are flat planes, and the three can be tightly joined together as one when under pressure.

[0038] Specifically, filter plate B130 and filter plate A110 have basically the same structure and are mirror-symmetrical. When they are combined to form a filter press unit, the third and fourth regions of filter plate B130 correspond to the first and second regions of filter plate A110, respectively. The area of ​​the third region of filter plate B130 is the same as that of the first region of filter plate A110, and the area of ​​the fourth region of filter plate B130 is the same as that of the second region of filter plate A110. The first flow guiding structure 111 and the second flow guiding structure 131 have the same structure. The first flow guiding structure 111 is connected to the filter chamber portion located between the second and fourth regions, and the second flow guiding structure 131 is connected to the filter chamber portion located between the first and third regions.

[0039] Specifically, to achieve the filtration function of the filter press unit, each filter press unit also includes two filter cloths, which are respectively covered on the first surface of filter plate A110 and the second surface of filter plate B130. Specifically, the filter cloths mainly cover the first flow guiding structure 111 / second flow guiding structure 131 and perform the filtration function. After the mother liquor is discharged through the filter cloth, the solid material is intercepted and accumulated by the filter cloth to form a filter cake. Specifically, the relatively protruding portions on both sides of the grooves on the first surface of filter plate A110 and the second surface of filter plate B130 provide support for the filter cloth. More specifically, fixing pins 200 are fixed on filter plate A110 and filter plate B130, and the filter cloth is fixed to filter plate A110 or filter plate B130 via the fixing pins 200.

[0040] For details, please refer to Figure 1 The water-saving filter press device also includes a support frame, which includes two parallel crossbeams 300. Correspondingly, two handle supports 140 are fixedly installed on the outer periphery of the filter plate A110, filter frame 120 and filter plate B130. The handle supports 140 are suspended and fixed on the crossbeams 300 to assemble the filter plate A110, filter frame 120 or filter plate B130 on the support frame.

[0041] Specifically, the water-saving filter press device may also include a hydraulic device and a pipeline system that can work together to achieve the corresponding functions. The hydraulic device is used to apply pressure to the assembly of filter plate A110, filter plate B130 and filter frame 120 to keep them in a tight and sealed contact state. The pipeline system is used to connect with the feed channel, inlet and outlet liquid channels, etc., to transport materials as well as cleaning liquid, washing liquid, etc. These are all known in the art and are not specifically limited here.

[0042] Please refer again to a more detailed implementation plan. Figure 1 The washing process of the water-saving filter press device provided in this embodiment of the utility model can include three washing methods: central washing, backwash A, and backwash B. These three methods can be performed sequentially according to a preset order and time.

[0043] Specifically, during central washing, deionized water and other cleaning solutions enter through the top inlet 101 (corresponding to the feed channel), pass through the filter cake in the filter chamber, and exit through the lower left and lower right inlet / outlet 102. During backwash A, deionized water and other cleaning solutions enter through the lower left inlet / outlet 102 (corresponding to one of the inlet / outlet channels) and exit through the upper right inlet / outlet 102. During backwash B, deionized water and other cleaning solutions enter through the lower right inlet / outlet 102 and exit through the upper left inlet / outlet 102. During the washing process, except for the inlets / outlets 102 which are open, all other inlets / outlets are sealed with external valves. It should be noted that... Figure 3 For example, in this utility model, both left and right are referenced to the paper surface.

[0044] The usage steps of a water-saving filter press device for washing provided in this embodiment of the utility model may include the following process:

[0045] The first step involves applying external force to compress the filter plates, multiple filter frames, and multiple filter plates B, which are then tightly arranged. Figure 1 and Figure 2 The state, and encloses itself to form multiple filter chambers;

[0046] The second step involves continuously feeding material through the top feed hole / feed channel, while the mother liquor in the material is continuously discharged through the lower left and lower right inlet / outlet holes / channels of filter plate A (B).

[0047] The third step is to stop feeding after the material fills the central hollow area (i.e., the filter chamber) of the filter frame;

[0048] The fourth step involves continuously feeding deionized water and other cleaning solutions through the feed port / channel, while continuously discharging washing water through the lower left and lower right inlet / outlet ports / channels of filter plate A (B).

[0049] Fifth step: Deionized water and other cleaning solutions are input from the lower left inlet / outlet hole / channel, and washing water is continuously discharged from the upper right inlet / outlet hole / channel of filter plate A (B);

[0050] Step 6: Deionized water and other cleaning solutions are input through the lower right inlet / outlet hole / channel, and washing water is continuously discharged from the upper left inlet / outlet hole / channel of filter plate A (B).

[0051] The seventh step is to test the conductivity of the washing water; if it is lower than the set standard, the washing process will stop.

[0052] Step 8: Remove the external clamping force to loosen the filter plates and filter frames inside the filter press and remove the filter cake from the filter frames.

[0053] The above is a complete workflow.

[0054] Preferably, pressure feedback is set to automatically stop the feed, controlling the filter cake density. Preferably, compressed air is used during the washing process to ensure that the washing water is completely drained.

[0055] In one embodiment, the filter frame has a rectangular flat plate with an internal opening. In alternative embodiments, the shape of the filter frame is not limited to this.

[0056] Compared to traditional center-feed filter press devices, the washing water-saving filter press device provided in this embodiment of the utility model achieves a significant saving of washing water by changing the position of the feed inlet. It can be executed in sequence with the central washing and backwashing A(B), reducing the total washing time required.

[0057] Traditional center-feed filter presses, limited by the position of the feed port, can only cover about 40% of the filter cake during center washing, as deionized water enters and exits through the central feed port. To achieve complete cleaning of the filter cake, the outlet needs to be constantly switched. The water-saving filter press provided in this embodiment, however, allows the washing water to cover all areas except the upper left and upper right corners during center washing, covering approximately 90% of the filter cake. Therefore, this water-saving filter press provides significant savings in washing water and reduces washing time.

[0058] Traditional center-feed filter presses are also limited by the position of the feed hole. During backwashing A(B), deionized water enters from below and exits through the feed hole, resulting in an uncertain water flow direction and dead zones that lead to poor washing performance. However, the water-saving filter press provided in this embodiment ensures a consistent washing path by ensuring the path is filled with a complete filter cake during backwashing A(B).

[0059] The present invention provides a water-saving filter press device that can ensure the maximum coverage of the filter cake area during central washing. Combined with backwashing A(B), it can achieve efficient washing of all parts of the filter cake.

[0060] It should be understood that the above embodiments are merely illustrative of the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A water-saving filter press device for washing, characterized in that, include: Filter plates A, filter frames, and filter plates B are arranged sequentially and cyclically along a first direction. The filter frame and an adjacent filter plate A and filter plate B together enclose a filter chamber. The filter chamber includes a first part and a second part arranged sequentially along a second direction. The filter plate A has a first flow guiding structure, and the filter plate B has a second flow guiding structure. The first flow guiding structure is directly connected to the first part, and the second flow guiding structure is directly connected to the second part. Each of the filter plate A, the filter frame, and the filter plate B is provided with a feed hole and multiple liquid inlet / outlet holes. The multiple liquid inlet / outlet holes are arranged around the perimeter of the filter plate A, the filter frame, and the filter plate B. All the feed holes on the filter plate A, the filter frame, and the filter plate B are sequentially connected to form a feed channel. The feed hole on the filter frame is directly connected to the filter chamber. The multiple liquid inlet / outlet holes on the filter plate A, the filter frame, and the filter plate B are respectively sequentially connected to form multiple liquid inlet / outlet channels. Some of the liquid inlet / outlet holes on one side of the filter plate A are directly connected to the first flow guiding structure, and some of the liquid inlet / outlet holes on the other side of the filter plate B are directly connected to the second flow guiding structure. The first direction and the second direction intersect.

2. The washing-saving filter press device according to claim 1, characterized in that: The filter plate A has a first side, and the filter plate B has a second side. The first side, the second side, and the filter frame together form the filter chamber. The first flow guiding structure is disposed on the first side, and the second flow guiding structure is disposed on the second side.

3. The washing-saving filter press device according to claim 2, characterized in that: The first flow guiding structure is a groove structure disposed on the first surface, and the second flow guiding structure is a groove structure disposed on the second surface.

4. The washing-saving filter press device according to claim 3, characterized in that: The trench structure includes a plurality of trenches arranged side by side along the second direction, and the plurality of trenches are interconnected.

5. The washing-saving water-saving filter press device according to claim 2, 3, or 4, characterized in that: The first surface includes a first region and a second region arranged sequentially along the second direction. The first flow guiding structure is disposed in the second region. The second surface includes a third region and a fourth region arranged sequentially along the second direction. The second flow guiding structure is disposed in the third region. The first region corresponds to the third region. The first part of the filter chamber is disposed between the first region and the third region. The second region corresponds to the fourth region. The second part of the filter chamber is disposed between the second region and the fourth region.

6. The washing-saving filter press device according to claim 1, characterized in that: The inlet and outlet holes on filter plate A that are directly connected to the first flow guiding structure and the other inlet and outlet holes that are not directly connected to the first flow guiding structure are arranged opposite to each other on both sides of filter plate A along the second direction. The inlet and outlet holes on filter plate B that are directly connected to the second flow guiding structure and the other inlet and outlet holes that are not directly connected to the second flow guiding structure are arranged opposite to each other on both sides of filter plate B along the second direction.

7. The washing-saving filter press device according to claim 1, characterized in that: The outer periphery of the filter plate A, the filter frame and the filter plate B are also fixedly provided with handle supports, which are used to assemble the filter plate A, the filter frame or the filter plate B on the bracket.

8. The washing and water-saving filter press device according to claim 1, characterized in that, Also includes: Multiple filter cloths are fixedly disposed on the side of the filter plate A or the filter plate B facing the filter chamber, and the filter cloths completely cover the first flow guiding structure or the second flow guiding structure.

9. The washing-saving filter press device according to claim 8, characterized in that: The filter plate A and the filter plate B are also provided with fixing pins, and the filter cloth is fixed to the filter plate A or the filter plate B via the fixing pins.

10. The washing-saving filter press device according to claim 1, characterized in that, Also includes: The support frame, the filter plate A, the filter frame and the filter plate B are assembled on the support frame.

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