KR20200121701A - plate for plate and frame type filter press - Google Patents

Abstract

The present invention relates to a plate of a double filter press, which is very easy to clean. The plate of a double filter press of the present invention comprises: an edge portion forming a closed loop shape; at least two flow path portions including flow path holes for defining flow paths when a plurality of frames and a plurality of plates are in close contact with each other; a drain hole which is a passage through which filtrate filtered through the plate is discharged to at least one of the flow path holes; and a drain plate connected to an inner side of the edge portion and having a predetermined structure.

Description

Plate for plate and frame type filter press

The present invention relates to a plate of a double filter press.

The filter press is a filtering device that dehydrates liquid components from a liquid to be treated such as industrial wastewater to the outside of the chamber and separates the remaining sludge from the inside of the chamber by using a plurality of filter plates, filter paper, and pressurizing means. Here, the chamber means an empty space for receiving the liquid to be treated. When the liquid to be treated in the chamber is dehydrated, sludge with a significantly lower moisture content remains, which is called a cake.

On the other hand, the filter press is sometimes used for food, and in this case, it is also manufactured in a small size.

Filter presses can be classified into single filter presses or double filter presses according to their use.

In the single filter press, filter plates of the same shape are repeatedly arranged, and the inside of the filter plate contains a concave recess, so that the two filter plates form one chamber.

In contrast, in the double filter press, a frame having a closed circuit structure and a plate formed in a film structure are formed as a pair, and these are repeatedly arranged. In the double filter press, the outer wall of the chamber is defined by a frame with an empty space inside and a plate on both sides.

1 schematically shows the overall shape of a double filter press, and FIG. 2 exemplarily shows a partial configuration of a double filter press.

Referring to FIG. 1, the filter press includes a plurality of frames 10, a plurality of plates 20, a filter paper 30, a liquid to be treated supply unit 40, a hydraulic cylinder 50, a pressure control means 52, and a head. (60) and a follower (60).

The frame 10 and the plate 20 are alternately and repeatedly arranged.

The filter paper 30 is disposed between the frame 10 and the plate 20.

The liquid to be treated supply unit 40 supplies liquid to be treated that needs to reduce the moisture content.

The liquid to be treated can be injected into the chamber in various ways. For example, the liquid to be treated may be supplied through a flow path formed by compression of the plurality of frames 10 and plates 20. As for the passage, the third passage portion 16 of the frame 10 and the seventh passage portion 26 of the plate 20 form the upper passage, and the fourth passage portion 18 and the plate 20 of the frame 10 The eighth passage portions 28 of each form the lower passages. The liquid to be treated supplied to the flow path may be injected into the chamber (ie, a closed-circuit internal space defined by the frame) through the flow path hole formed in the third flow path unit 16 and the inlet hole formed between the chamber.

The liquid to be treated injected into the chamber is provided with a pressure to supply the liquid to be treated, and the contained moisture is discharged through the filter paper. Moisture may be discharged to the plate 20 side.

In the plate 20, moisture flows to at least one of the four corners through a predefined path. Moisture is eventually discharged through a drain hole formed between the inside of the rim of the plate 20 and the flow path. For example, moisture flowing in the inner space of the plate 20 flows to the fifth flow passage 22 and the sixth flow passage 24, and the first flow passage 12 and the plate 20 of the frame 10 The outside of the filter press through the lower flow path defined by the fifth flow path part 22 of and the upper flow path defined by the second flow path part 14 of the frame 10 and the sixth flow path part 24 of the plate 20 Is discharged into.

The plate 20 may be formed as a drainage space formed on a substantially hexagonal plane by avoiding a rectangular plate with flow path holes formed at four corners and a space occupied by the flow path hole in the center. This shape is disclosed in Korean Patent Registration No. 10-1195669.

On the other hand, in order to use the space more efficiently, the plate 20 may have a separate extension portion to form a flow path hole. This is to use most of the area excluding the corners of the rectangular plate for filtration. These extensions are illustrated as the fifth passage portion 22 to the eighth passage portion 28 shown in FIGS. 2 and 3.

The hydraulic cylinder 50 provides pressure to the frame 10 and the plate 20, and this pressure can be adjusted through the pressure control means 52.

The head 60 is a portion that serves as a reference surface for compressing the frame 10 and the plate 20 of the filter press and is fixed at a reference position.

The follower 70 is movable including a surface for pressing the frame 10 and the plate 20 on the opposite side of the head 60.

The follower 70 may move toward or away from the frame 10 and plates 20.

The follower 70 moves toward the frame 10 and the plate 20 to transmit the pressure of the hydraulic cylinder 50 to them. The follower 70 also assists the separation of the frame 10 and the plate 20 by moving in the opposite direction to the top. That is, the follower 70 may be connected in succession to the frame 10 and the plate 20 connected by a connection auxiliary means such as a chain, and pull them to separate them from each other.

On the other hand, Figure 3 shows an exploded view of the plate 20 used in the prior art.

The plate 20 includes a fifth passage portion 22, a sixth passage portion 24, a seventh passage portion 26, an eighth passage portion 28, a perforated plate 23, and a screw connection portion 25. do.

The perforated plate 21 supports its shape so that the plate 20 is not depressed by a pressure pressed by the liquid to be treated formed in the chamber. On the other hand, the through hole formed in the perforated plate 23 provides a passage so that moisture that has passed through the filter paper 30 can flow into the space between the two perforated plates 23.

The two perforated plates 23 disposed opposite to each other are screwed by the screwing portion 25.

The edge portion of the plate 20 and the perforated plate 23 define a space through which moisture flows. Water may be discharged to the outside through the drain hole and the fifth and sixth passages 22 and 24 again.

The perforated plate 23 is subjected to a strong pressure by the pressure to which the liquid to be treated is supplied. In order to prevent depression that may occur due to this pressure, a support may be installed inside the edge of the plate 20.

This conventional plate 20 has several disadvantages.

First, it is not spatially efficient because the perforated plate 23 must be installed on both the front and rear sides of the plate 20. That is, there is a disadvantage in that the thickness of the plate 20 itself becomes thicker, and a lot of time is wasted for washing due to foreign matters stuck inside.

Second, the perforated plate 23 is likely to be depressed due to the supply pressure of the liquid to be treated, and even if the support is installed, there is a limit in resisting shape deformation due to pressure.

Third, cleaning the inside of the perforated plate 20 requires a long cleaning operation time because disassembly work is accompanied, and a state in which foreign substances are not removed frequently occurs. Due to these shortcomings, the prior art could cause product instability, especially when used in food and pharmaceutical industries where impurities should be minimized. In other words, these limitations exist in the use of filter presses in food manufacturing and pharmaceuticals.

The present invention is proposed to improve the above-described problems of the prior invention.

The technical problem to be solved by the present invention is relatively thin, the shape is not easily deformed, and the filtrate on the plate can flow without using a method of supporting both sides with a perforated mesh panel as in the prior art, thereby increasing filtration efficiency. It is possible to provide a plate of a double filter press that is very easy to clean because it can be cleaned without separating components.

In order to solve the above technical problem, the plate of the double filter press according to an embodiment of the present invention includes an edge portion forming a closed circuit shape; At least two or more flow paths including flow paths for defining flow paths when the plurality of frames and the plurality of plates are in close contact with each other; A drain hole which is a passage for discharging the filtrate filtered through the plate to at least one of the passage holes; And a drain plate connected to the inner side of the edge portion and having a structure that satisfies all of the following conditions; including, condition 1) a plurality of planes disposed substantially on the same plane as the front and rear surfaces of the edge portion, Condition 2) The spacing between the plurality of planes should be less than a predetermined distance, Condition 3) The drain plate should define a flow path to at least one edge of the edge portion, and at least one of the inner edge of the edge portion, the drain hole Drainage grooves may be formed that define a flow path to the furnace.

In one embodiment of the present invention, the drainage plate includes a square wave structure in which a floor and a valley are disposed on substantially the same plane as the front and rear surfaces of the edge, respectively, and between the floor and the floor, the valley and the valley, The spacing is formed to be less than the predetermined interval, and the drainage groove may be formed in at least one of corners corresponding to the flow path defined by the square wave shape.

In one embodiment of the present invention, the drain plate may be formed of a plain weave wire mesh having a plurality of points disposed substantially on the same plane as the front and rear surfaces of the edge portion.

In an embodiment of the present invention, the drain plate includes a plurality of square rods having substantially the same thickness as any one corner of the edge portion and arranged in parallel; And a plurality of penetrating rods orthogonal and penetratingly coupled to the plurality of square rods, wherein the drain groove may be formed in at least one of corners corresponding to a flow path defined by the square rod.

In one embodiment of the present invention, the drain plate includes a plurality of cross-shaped rods including a portion having substantially the same thickness as any one corner of the edge portion, wherein the cross-shaped rods are arranged side by side and adjacent to each other, and It can be connected without.

The plate used in the conventional filter press has the biggest problems in food manufacturing and pharmaceuticals, such as decay of food due to foreign matter inside the plate, and the remaining of impurities, but the present invention is 1) easy to clean and not easily trapped. The structure has solved the above problems such as decay, and 2) a thinner plate can be configured, so the number of frames and plates that can be included in one filter press increases, and a much larger amount of liquid to be treated can be processed (filtered). , 3) Since it has a solid structure rather than a conventional thin plate, there is a remarkable effect that productivity is remarkably improved because deformation of shape such as depression does not occur easily.

1 schematically shows the overall shape of a conventional double filter press.
2 is an exemplary diagram showing a configuration of a conventional double filter press.
3 is an exploded view of a partial configuration of a conventional double filter press.
Figure 4 schematically shows the overall shape of the double filter press according to an embodiment of the present invention.
5 shows a frame of a double filter press implemented with the present invention.
6 shows a plate of a double filter press according to an embodiment of the present invention.
7 is an exploded view of a plate of a double filter press according to an embodiment of the present invention.
8 is a cross-sectional view of A-A' in FIG. 7.
9 shows a plate of a double filter press according to another embodiment of the present invention.
10 shows a plate of a double filter press according to another embodiment of the present invention.
11 is an exploded view of a plate of a double filter press according to another embodiment of the present invention.
12 to 15 are diagrams illustrating a process of processing a liquid to be treated by a double filter press according to an embodiment of the present invention through some configurations.

Since the present invention can apply various transformations and have various embodiments, specific embodiments are illustrated in the drawings and will be described in detail in the detailed description. However, this is not intended to limit the present invention to a specific embodiment, it is to be understood to include all conversions, equivalents, and substitutes included in the spirit and scope of the present invention.

In describing the present invention, when it is determined that a detailed description of a related known technology may obscure the subject matter of the present invention, a detailed description thereof will be omitted.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 4 schematically shows the overall shape of the double filter press according to an embodiment of the present invention.

4, the filter press includes a plurality of frames 100, a plurality of plates 200, a filter paper 300, a liquid to be treated supply unit 400, a hydraulic cylinder 500, a pressure control means 520, a head 600 and a follower 700.

Frame 100 and plate 200 are alternately arranged repeatedly.

The filter paper 300 is disposed between the frame 100 and the plate 200.

As a means of filtering water, an expensive paper filter paper or a natural filter cloth has been used, and the filter paper will be exemplified in the present invention.

The liquid to be treated supply unit 400 supplies liquid to be treated that needs to reduce the moisture content.

The liquid to be treated can be injected into the chamber in various ways. For example, the liquid to be treated may be supplied through a flow path formed by compression of the plurality of frames 100 and the plates 200. As for the passage, the third passage portion 116 of the frame 100 and the seventh passage portion 216 of the plate 200 form the upper passage, and the fourth passage portion 118 and the plate 200 of the frame 100 The eighth passage portions 218 of each form the lower passages. The liquid to be treated supplied to the flow path is injected into the chamber through the flow path hole formed in the third flow path part 116 and the inlet hole 140 formed through the chamber (that is, the closed-circuit internal space defined by the frame 100). I can.

The liquid to be treated injected into the chamber is provided with a pressure to supply the liquid to be treated, and the contained moisture is discharged through the filter paper 300. Water may be discharged to the plate 200 after passing through the filter paper 300.

In the plate 200, moisture flows to at least one of the four corners through a predetermined path. Moisture is eventually discharged through the drain hole 240 formed between the inside of the rim of the plate 200 and the flow path. For example, moisture flowing between the inner structures of the plate 200 flows to the fifth flow passage 212, the sixth flow passage 214 and the eighth flow passage 218. Meanwhile, the first passage part 112 of the frame 100, the fifth passage part 212 of the plate 200, and the fourth passage part 118 of the frame 100 and the eighth passage part of the plate 200 (218) are in close contact with each other to define a long discharge passage on both sides of the lower part. In addition, the second passage portion 114 of the frame 100 and the sixth passage portion 214 of the plate 200 define a long discharge passage on one side of the upper portion. As a result, the moisture is discharged to the outside of the filter press through the discharge passages on one side of the upper and both sides of the lower side defined together by the frame 100 and the plate 200 in close contact.

The hydraulic cylinder 500 provides pressure to the frame 100 and the plate 200, and this pressure can be adjusted through the pressure control means 520.

The head 600 is a portion that serves as a reference surface for compressing the frame 100 and the plate 200 of the filter press and is fixed at a reference position.

The follower 700 may move including a surface for compressing the frame 100 and the plate 200 on the opposite side of the head 600.

The follower 700 may move toward or away from the frame 100 and the plate 200.

The follower 700 moves toward the frame 100 and the plate 200 to transmit the pressure of the hydraulic cylinder 500 to them. The follower 700 also moves in the direction opposite to the top to assist the separation of the frame 100 and the plate 200. That is, the follower 700 may be connected in succession to the frame 100 and the plate 200 connected by a connection auxiliary means such as a chain, and pull them to separate each other.

5 shows a frame 100 of a double filter press implemented with the present invention.

Referring to FIG. 5, the frame 100 of the double filter press includes a first passage part 112, a second passage part 114, a third passage part 116, a fourth passage part 118, and an inlet hole ( 140).

The first passage part 112, the second passage part 114, and the fourth passage part 118 are, as described above, the fifth passage part 212, the sixth passage part 214, and the fourth passage part 214 of the plate 200. It is formed to define a discharge flow path together with the 8 flow path part 218.

The third passage part 116 is formed together with the seventh passage part 216 to define an inflow passage. The liquid to be treated filled through the inflow passage may be filled into the space inside the frame 100 through an inlet hole 140 formed through the third passage part 116 toward the inside of the frame 100. The space filled with the liquid to be treated or a structure surrounding it is also referred to as a chamber.

The number and arrangement of the inflow passages and the discharge passages may be changed as needed. In one embodiment of the present invention, one inlet passage and three discharge passages are formed.

6 to 8 show a plate 200 of a double filter press according to an embodiment of the present invention.

6 to 8, the plate 200 of the double filter press according to an embodiment of the present invention includes a lower end 221, a first side 223, an upper end 225, a second side 227, and It includes a 5 passage portion 212, a sixth passage portion 214, a seventh passage portion 216, an eighth passage portion 218, a drain plate 230, a drain groove 232 and a drain hole 240. Although not shown in the drawing, a drain groove of the same shape may be formed at an upper position opposite to the drain groove 232 formed at the bottom.

The lower end 221, the first side 223, the upper end 225 and the second side 227 are connected in a rectangular frame shape to form a closed circuit shape. In the description of the present invention, the connection between the lower end 221, the first side 223, the upper end 225 and the second side 227 will be referred to as an edge.

The fifth passage portion 212, the sixth passage portion 214, the seventh passage portion 216, and the eighth passage portion 218 are disposed at four corners of the plate 200, respectively.

Each channel portion may be configured by forming a channel hole inside a rectangle, or may be configured by forming a channel hole in a structure protruding out of the rectangular frame. In the exemplary embodiment of the present invention, a small rectangular area for forming a channel hole is defined at each corner of a rectangle, and a round channel hole is formed in each rectangular area, thereby configuring a channel portion.

The flow path part includes a flow path hole for defining a flow path when the plurality of frames 100 and the plurality of plates 200 are in close contact with each other.

Of the four flow paths, the fifth flow passage 212, the sixth flow passage 214 and the eighth flow passage 218 are the first passage 112, the second passage 114 and the second passage of the frame 100. 4 Define a discharge passage through which the filtered moisture is discharged together with the passage part 118.

The seventh passage portion 216 of the four passage portions defines an inflow passage through which the liquid to be treated is supplied together with the third passage portion 116 of the frame 100.

The drain plate 230 is connected to the inner surface of the edge portion. When the plate 200 is made of metal, the drain plate 230 and the edge portions may be connected by welding or strong pressure and heat to be integrated.

The drain plate 230 may structurally define a flow path through which moisture input by the filter paper 300 can flow to at least one of the edge portions.

The drain plate 230 may be formed to satisfy the following three conditions for this purpose.

First, there must be a plurality of planes disposed substantially on the same plane as the front and back sides of the edge portion. This is because the filter paper 300 may be depressed and torn when the depth occupied by the edge drain plate 230 is different. In particular, recently, disposable filter paper is used instead of filter cloth, which should be noted because it is less durable than filter cloth. On the other hand, substantially the same plane means that there is no significant difference when considering the deformation of the filter paper 300 even if it is not physically disposed on the same plane.

Second, the spacing between the plurality of planes must be less than or equal to a predetermined spacing. When a valley (groove) exists between the plurality of planes, a space through which moisture introduced after passing through the filter paper flows can be defined. However, if the space between the planes is too wide, there is a possibility that the filter paper 300 may be depressed and torn between the planes, so it must be less than a predetermined distance. That is, the predetermined interval means an interval at which the filter paper 300 is not excessively depressed or torn.

Third, the drain plate 230 should define a flow path to at least one corner of the edge portion. That is, even if there are a plurality of valleys between the planes, they must be connected to each other to flow to any one corner of the edge. This is for discharging moisture through a drainage groove to be described later.

Such a structure may be, for example, a corrugated structure in which the floors and valleys are disposed on substantially the same plane as the front and rear sides of the edge portions, that is, a corrugated cardboard structure. In this case, the interval between the floor and the floor, and the valley and the valley may be formed to be less than the predetermined interval. It is desirable to form the floor and valley to a degree that the flat part has a certain length rather than a pointed shape. The wave shape of the drain plate 230 is repeated along the horizontal line and is combined with the first side part 223 and the second side part 227, and the wave shape itself extending along the horizontal line extends vertically and extends in the lower end 221 and It may be combined with the upper end 225.

One of the embodiments satisfying the above condition is the drain plate 230 shown in FIG. 6.

Referring to FIG. 6, the drain plate 230 may have a structure in which a part on the same plane as the front side of the edge portion and a part on the same plane as the back side part are periodically repeated at a predetermined interval. That is, the drain plate 230 may have a square wave shape in its cross-section.

During the pressing operation of the filter press, the moisture that has entered onto the drain plate 230 may be between the corrugated floor and the floor of the drain plate 230 (on the opposite side, between the valley and the valley. In the present invention, the same plane as the front of the edge portion) It is possible to move in). That is, moisture may flow toward the lower end 221 or the upper end 225.

Moisture should eventually be discharged through the fifth passage part 212, the sixth passage part 214, and the eighth passage part 218.

However, it may be difficult to make passages that flow to the fifth passage part 212, the sixth passage part 214, and the eighth passage part 218 only with the shape of the drain plate 230. This is because, as a result of the structure of the drain plate 230 being arranged in the vertical direction, horizontal movement is restricted. In order to solve this problem, the present invention has designed a drain groove 232 at least at the lower end 221. In other words, the drainage groove serves as a passage to bypass the blocked flow path. Although not shown in the drawing, the drain groove 232 may also be provided in the upper end 225.

The drainage groove 232 may be formed by making a groove on the upper surface of the lower end 221.

The drain groove 232 defines a flow path connected to the drain hole 240.

The drain hole 240 may be formed by passing through the inner side of the edge portion and between the fifth passage portion 212, the sixth passage portion 214 and the eighth passage portion 218, respectively. It is sufficient if the shape of the drain hole 240 is defined not only in the above-described shape, but consequently, the moisture flowing down or rising from the drain plate 230 and flowing into the drain groove 232 reaches the flow path.

9 shows a plate 200 of a double filter press according to another embodiment of the present invention.

The difference between the embodiment in FIG. 9 and the embodiment in FIGS. 6 to 8 lies in the shape of the drain plate 230.

The drain plate 230 may be formed of a plain weave wire mesh having a plurality of points disposed substantially on the same plane as the front and rear sides of the edge portion.

The plain weave wire mesh is formed by intersecting thin metal wires. Such a shape may be achieved by repeating, for example, arranging a plurality of metal lines in a vertical direction, and then arranging other metal lines horizontally, and passing the metal lines arranged in the vertical direction once up and once down.

It may be more preferable that a plurality of points disposed on substantially the same plane as the front and rear edges of the edge portion are formed in a plane having a predetermined area. To this end, it is possible to form the drain plate 230 by pressing the cross-formed plain weave wire mesh with a strong physical force. Here, the plurality of points disposed substantially on the same plane as the front and rear surfaces may be points where the metal lines cross each other.

In this embodiment, since the metal lines are arranged in a cross-sectional shape to create a space, the filtrate (moisture) that has passed through the filter paper 300 may move to the lower part 221 and the upper part 225 in this space. Thereafter, moisture may be discharged to the outside through the drainage groove 232 and the drainage hole 240.

10 and 11 show the plate 200 of the double filter press according to another embodiment of the present invention.

The difference between the embodiments in FIGS. 10 and 11 from the previous embodiments lies in the shape of the drain plate 230.

The drain plate 230 may be arranged in a row by adjoining a plurality of rods extending in a cross shape. A plurality of adjacent rods are connected to each other without gaps (ie, at least not to leak filtrate or moisture) through welding, pressing, or the like.

The cross-shaped front and rear sides are placed on substantially the same plane as the front and rear sides of the edge portion, and the interval between adjacent planes is set to be approximately 2mm to 5mm so that the filter paper 300 is not easily depressed.

In plan view, the cross-shaped horizontal portion may serve as a bottom surface of a groove having a predetermined depth with respect to the front and rear sides of the edge portion, respectively. Moisture introduced into the drain plate 230 may flow upward or downward along the groove.

12 to 15 are diagrams illustrating a process of processing a liquid to be treated by a double filter press according to an embodiment of the present invention.

Referring to FIG. 12, the liquid to be treated is supplied to the chamber through a flow path hole formed in the third flow path portion 116 formed in the frame 100 and an inlet hole 140 passing through the chamber.

13 is a view of a plate 200 and two frames 100 adjacent thereto being pressed from the left side, and the flow of the liquid to be treated is superimposed. The liquid to be treated receives a force that expands inside the chamber by the supply pressure, whereby the moisture passes through the filter paper 300 and moves to the drain plate 230 of the plate 200.

Referring to FIG. 14, the moisture provided to the drain plate 230 of the plate 200 is a fifth passage part 212, a sixth passage part 214, and an eighth passage part 218 along the above-described predetermined path. Can be discharged as.

FIG. 15 shows a view of a plate 200 and two frames 100 adjacent thereto being pressed from the right side and the flow of moisture (filtrate) superimposed. After the moisture is discharged to the fifth and sixth passages 212 and 214, respectively, the fifth passage 212 and the first passage 112, the sixth passage 214 and the second passage It may be discharged to the outside through a flow path defined by flow path holes formed in the portions 114.

The plate of the double filter press according to an embodiment of the present invention has a drainage plate formed in a single structure (in terms of requiring no mechanical assembly), and is easy to clean because both the front and the rear of the drainage plate can be accessed without disassembling from the outside. There is one effect.

In addition, since the drain plate is formed in a single structure, the thickness of the plate itself can be reduced, so that a large amount of liquid to be treated can be treated in a single treatment process.

In addition, since the dual network structure is not adopted as in the prior art, a specific portion is not depressed by the pressure of the liquid to be treated. Therefore, the present invention has a structurally stable effect.

In particular, in the prior art, by taking a structure in which a perforated net is formed on the front and rear of the plate, it is easy to retain dirt and debris. In the present invention, by taking the form of a drainage plate of a single structure, there is no need to release the coupling, and there is an effect that the washing operation can be completed very easily and quickly only by washing with water and washing the brush from both sides.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. In the present application, terms such as "comprise" or "have" are intended to designate the presence of features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, but one or more other features. It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof, does not preclude in advance.

100: frame
112: first euro part
114: 2nd euro part
116: 3rd euro part
118: Euro 4
140: inlet hole
200: plate
212: Euro 5
214: Euro 6
216: Euro part 7
218: Euro part 8
221: lower part
223: first side
225: upper part
227: second side
230: drain plate
232: drainage groove
240: drain hole
300: filter paper
400: processing target liquid supply unit
500: hydraulic cylinder
520: pressure control means
600: head
700: Followers

Claims (5)

An edge portion forming a closed circuit shape;
At least two or more flow paths including flow paths for defining flow paths when the plurality of frames and the plurality of plates are in close contact with each other;
A drain hole which is a passage for discharging the filtrate filtered through the plate to at least one of the passage holes; And
Includes; a drain plate connected to the inner side of the edge and having a structure that satisfies all of the following conditions,
Condition 1) There must be a plurality of planes disposed substantially on the same plane as the front and back sides of the edge
Condition 2) The spacing between the plurality of planes must be less than a predetermined spacing
Condition 3) The drainage plate should define a flow path to at least one corner of the edge.
A plate of a double filter press, wherein a drain groove defining a flow path to the drain hole is formed at at least one of the inner corners of the edge portion.
The method of claim 1,
The drainage plate,
The floor and the valley include a square wave structure in which the front and rear sides of the edge are disposed on substantially the same plane, respectively,
The spacing between the floor and the floor, and the valley and the valley is formed to be less than the predetermined distance,
The drainage groove is a plate of the double filter press, characterized in that formed in at least one of the corners corresponding to the flow path defined by the square wave shape.
The method of claim 1,
The drain plate is a plate of a double filter press, characterized in that formed of a plain weave wire mesh having a plurality of points disposed on substantially the same plane as the front and rear of the edge portion.
The method of claim 1,
The drain plate includes a plurality of square rods having substantially the same thickness as any one corner of the edge portion and arranged in parallel; And
Including; a plurality of through-bars coupled through orthogonal to and through the plurality of square bars,
The drainage groove is a plate of the double filter press, characterized in that formed in at least one of the corners corresponding to the flow path defined by the square bar.
The method of claim 1,
The drain plate includes a plurality of cross-shaped rods including a portion having substantially the same thickness as any one corner of the edge portion; and
The plate of the double filter press, characterized in that the cross-shaped rods are arranged adjacent to each other side by side and are connected seamlessly.

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