CN205235504U - Filter plate of filter press - Google Patents

Abstract

The utility model relates to a filter plate of a filter press, which comprises a plate frame. Diaphragms made of elastic materials are arranged on both sides of the plate frame. The medium cavity; the middle part of the diaphragm is provided with a sludge hole, the sludge channel is provided between the sludge holes of the diaphragm on both sides of the plate frame, the plate frame is provided with a water outlet channel, and the outer surface of the diaphragm is provided with a plurality of protrusions. Therefore, when the medium with the same pressure is passed into the medium cavity, the filter plate with a raised surface can generate greater pressure on the sludge than the filter plate with a smooth surface, so that the water in the sludge can be discharged more fully. In addition, when the diaphragms on both sides of the filter plate are made of heat-conducting materials, when the heating medium is passed into the medium cavity of the filter plate, the protrusions on the surface of the filter plate can increase the heat conduction area, thereby improving the heating effect on the sludge. Improve the dewatering efficiency of sludge.

Description

filter plate for filter press

technical field

The utility model relates to a filter plate of a filter press.

Background technique

A filter press is a machine used to filter liquid from a solid-liquid mixture, and is widely used in the drying of materials in industries such as medicine, food, chemical industry, and sewage. For example, pressurized filter plates and heated filter plates are often used in filter presses for sludge treatment in the sewage treatment industry. For example, the patent No. ZL201120498066X relates to a heated filter plate, and the patent No. Pressurized filter plate; Both the pressurized filter plate and the heated filter plate have a hollow medium cavity, and the medium cavity is used to pass in and out the processing medium; both the pressurized filter plate and the heated filter plate are equipped with through filter plates There is a sludge channel on the filter plate, and a water outlet channel for discharging the water squeezed out of the sludge is also provided on the filter plate; when the sludge is dehydrated, multiple filter plates are stacked together and pressed from both ends by the filter press Sludge is passed into the sludge channel, and the surfaces of two adjacent filter plates are filled with sludge to form a sludge cavity, which is then injected into the medium cavity of the pressurized filter plate and the heated filter plate, respectively. The pressure medium and heat medium are passed through. The plates on both sides of the pressurized filter plate are generally made of elastic materials, which are generally called diaphragms; The sludge is extruded to dehydrate the sludge; the plate surfaces on both sides of the heating filter plate can conduct heat, and the plate surfaces on both sides of the heating filter plate can be made of metal plates or heat-conducting elastic materials. The surface of the heating plate made of thermally conductive elastic material can be called a diaphragm; the heat medium in the medium chamber of the heating filter plate heats the sludge in the sludge chamber through the plates on both sides to vaporize and discharge the water , in order to gasify the moisture in the sludge in the sludge chamber at a lower temperature, a vacuum device is generally equipped to vacuumize the sludge chamber.

In the prior art, for the above-mentioned pressurized filter plate, the diaphragms on both sides are generally smooth rubber surfaces. The surface of the diaphragm and the filter cloth are bonded together, which is not conducive to the formation of a channel for sewage discharge; in addition, the extrusion pressure generated by the smooth diaphragm surface on the sludge is small, while the extrusion pressure generated by the diaphragm surface on the sludge has a greater impact on the sludge. The influence of the amount of water discharge in the medium is greater, and the greater the pressure, the more water will be discharged. However, due to the limitation of the pressure equipment and the material of the pressurized filter plate, the pressure of the pressure medium that can be introduced into the medium cavity of the pressurized filter plate is limited, and increasing the pressure of the pressure medium will affect the pressure of the pressurized equipment. And pressurized filter plates have higher requirements, higher cost, and greater energy consumption.

Utility model content

In view of the technical defects in the prior art, the purpose of this utility model is to provide a filter plate of a filter press, which can increase the local extrusion pressure on the treated sludge, so that the dehydration effect of the sludge is better.

In order to achieve the above and related purposes, the filter plate of a filter press provided by the utility model adopts the following technical scheme: the filter plate of the filter press includes a plate frame, and a diaphragm made of elastic material is arranged on both sides of the plate frame , the plate frame and the diaphragm on both sides are closed to form a medium cavity that can be filled or discharged with pressure medium; the diaphragm includes an inner surface for contacting with the pressure medium and an outer surface for contacting with sewage. There are sludge holes, a sludge channel is provided between the sludge holes of the diaphragm on both sides of the plate frame, a water outlet channel is provided on the plate frame, and a filter press area is provided on the outer surface of the sludge hole. The filtering area is provided with a plurality of protrusions.

Preferably, the elastic material is rubber.

Preferably, the elastic material is thermally conductive rubber.

Preferably, the diaphragm is provided with through water outlet holes, and a water filter gap is formed between the plurality of protrusions, and the water filter gaps communicate with each other and with the water outlet holes, and the water outlet holes are connected with the water outlet holes. The channels are connected.

Preferably, the water outlet holes are located at the periphery of the filter press area.

Preferably, a water filter groove is provided on the diaphragm, and the water filter gap communicates with the water outlet hole through a water filter groove.

Preferably, the protrusion is columnar, and the top end of the protrusion is flat.

Preferably, the protrusions are evenly distributed in the filter press area.

Preferably, a ring of sealing lips is provided on the outer edge of the diaphragm.

Preferably, a sealing ring for matching with the frame of the filter plate is provided on the inner side near the outer edge, the water outlet hole is located outside the sealing ring, and the sludge hole is located inside the sealing ring.

Based on the above technical solution, the filter plate of a filter press of the present invention has the following beneficial effects: on the surface of both sides of the filter plate, there are a plurality of protrusions, and the contact area between the protrusions and the sludge is small. When the medium of the same pressure is passed into the cavity, the filter plate with a raised surface can generate greater pressure on the sludge than the filter plate with a smooth surface, so that the water in the sludge can be discharged more fully. In addition, when the diaphragms on both sides of the filter plate are made of heat-conducting materials, when the heating medium is passed into the medium cavity of the filter plate, the protrusions on the surface of the filter plate can increase the heat conduction area, thereby improving the heating effect on the sludge. Improve the dewatering efficiency of sludge.

Description of drawings

Fig. 1 is a structural representation of a membrane filter plate of a filter press;

Fig. 2 is A-A sectional view among Fig. 1;

Fig. 3 is the structural representation of diaphragm;

Fig. 4 is a B-B sectional view in Fig. 3 .

1 plate frame 221 raised

11 medium inlet 222 water filter clearance

12 medium outlet 223 filter tank

13 communication hole 224 sealing lip

14 media chambers 225 sludge holes

15 water outlet channel 226 filter press area

16-core tube 23 outlet holes

17 Intermediate support part 24 Sealing ring

2 diaphragm 25 sludge channel

21 inner side 26 communication channel

22 outside

detailed description

Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is described in further detail. These embodiments are only used to illustrate the utility model, but not to limit the utility model.

In the description of the present utility model, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the utility model and simplified descriptions, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and should not be understood as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a flexible connection. Detachable connection, or integral connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model in specific situations.

In addition, in the description of the present utility model, unless otherwise specified, "plurality" means two or more.

Fig. 1 is a structural representation of a filter press diaphragm filter plate; Fig. 2 is a sectional view of A-A in Fig. 1; Diaphragms 2 made of elastic materials are arranged on both sides of the plate frame 1, and the space between the plate frame 1 and the diaphragms 2 on both sides is closed to form a medium cavity 14 that can be filled or discharged with pressure medium; Figure 3 is a schematic structural diagram of the diaphragm 2 ; Fig. 4 is a B-B sectional view in Fig. 3; As shown in Fig. 3 and Fig. 4, the diaphragm 2 includes an inner side 21 for contacting with the pressure medium, an outer side 22 for contacting with the sewage, and the middle part of the diaphragm 2 is provided with a sewage Mud holes 225; as shown in Figure 1 and Figure 2, a sludge channel 25 is provided between the sludge holes 225 of the diaphragm 2 on both sides of the plate frame 1, and a water outlet channel 15 is provided on the plate frame 1, and the sludge hole 225 periphery A filter press area 226 (see FIG. 3 ) is provided on the outer surface 22 of the filter press area 226, and a plurality of protrusions 221 (see FIG. 3 ) are arranged on the filter press area 226 . The protrusion 221 can be any shape that can form a plurality of protruding regions in the filter press area 226. In order to facilitate manufacturing and processing, the protrusion 221 can be arranged as a column with a regular geometric shape, such as a cylinder, a rectangular column, etc., and the top of the protrusion 221 is a plane; in order to enable the sludge in the sludge chamber to be squeezed relatively uniformly, the projections 221 of the filter press area 226 can be evenly distributed. When multiple filter plates are stacked together, the surface of the diaphragm 2 on both sides of the filter plate is covered with filter cloth (not shown in the figure), and a sludge chamber is formed between the opposite diaphragms 2 of two adjacent filter plates (not shown in the figure); fill into sludge in the sludge chamber by the sludge channel 25, and the sludge is between the filter cloths and then passes into the pressure medium in the medium chamber 14, under the effect of the pressure medium, The diaphragm 2 is bulged outward by the pressurized medium, and squeezes the sludge in the sludge chamber to dehydrate the sludge. Since a plurality of protrusions 221 are arranged on the surface of both sides of the filter plate, a water filter gap 222 that is beneficial to drainage is formed between the protrusions 221, and the sewage squeezed out from the sludge can be discharged through the water filter gap 222; The contact area between the protrusions 221 and the sludge is small, and when the medium with the same pressure is passed into the medium chamber 14, the filter plate with the protrusions 221 on the surface can generate more sludge to the sludge than the filter plate with a smooth surface. The pressure makes the water in the sludge more fully discharged.

As shown in Figure 1 and Figure 2, as an embodiment of the filter plate of the filter press of the present invention, the filter plate has a middle support part 17, and the center of the middle support part 17 has a channel (not marked in the figure), On the inner side 21 of the diaphragm 2 of the filter plate near the outer edge, the inner side 21 of the sludge hole 225 is provided with a sealing ring 24 for matching with the frame 1 of the filter plate, and the outlet hole 23 is located on the inner side 21 of the diaphragm 2 near the Outside the sealing ring 24 at the outer edge, the sludge hole 225 is located on the inner surface 21 of the diaphragm 2 near the inner side of the sealing ring 24 at the outer edge, and the two sides of the plate frame 1 and the channel of the middle support part 17 are provided with the sealing ring 24 Corresponding sealing groove (not marked in the figure), the diaphragm 2 on both sides of the filter plate is embedded in the sealing groove on the side of the plate frame 1 and the sealing groove at the channel of the middle support part 17, and the channel of the middle support part 17 and the diaphragm 2 A core tube 16 is also arranged between the inner walls of the sludge hole 225, and the outer cylindrical surface of the core tube 16 is closely matched with the wall of the sludge hole 225, so that the wall of the sludge hole 225 of the diaphragm 2 and the channel of the intermediate support part 17 are pressed tightly so that The two are reliably sealed, and the inner cylindrical surface of the core pipe 16 forms the sludge channel 25 . Two left and right medium chambers 14 are formed between the middle support part 17 of the plate frame 1 and the diaphragm 2 on both sides of the filter plate, and a medium inlet 11 and a medium outlet 12 are provided on the plate frame 1 of the filter plate; the medium inlet 11 It communicates with the medium chamber 14 on the left and right sides respectively through two communication holes 13 (in Fig. 2, due to the selection of the split plane, the communication between the media chamber 14 on the left side and the medium inlet 11 in Fig. 2 hole 13 can not be displayed), the communication hole 13 is arranged inside the plate frame 1; similar to the communication mode between the medium inlet 11 and the medium cavity 14, the medium outlet 12 and the medium cavity 14 on the left and right sides are also respectively It communicates through two communication holes 13 . In the embodiment of the above-mentioned filter plate of the filter press, the intermediate support portion 17 is provided on the filter plate mainly to provide a certain support for the diaphragm 2 of the filter plate, and to prevent the diaphragm 2 of the filter plate from being sunken and deformed to the inside of the medium cavity 14 ; But the middle support part 17 is not a necessary structure, and the diaphragm 2 of the filter plate can also be supported in other ways to prevent it from being sunken and deformed to the inside of the medium cavity 14 . In the above-mentioned embodiment, a medium chamber 14 is respectively formed between the two side surfaces of the middle support part 17 and the diaphragms 2 on both sides of the filter plate. The chambers 14 are connected to form a whole media chamber 14 .

As shown in Figures 1 and 3, the diaphragm 2 is provided with a through water outlet hole 23, the water outlet hole 23 can be arranged on the periphery of the filter press area 226, and a water filter gap is formed between a plurality of protrusions 221 in the filter press area 226 222 , the water filtering gaps 222 communicate with each other and communicate with the water outlet hole 23 , the water outlet hole 23 communicates with the water outlet channel 15 on the plate frame 1 through the communication channel 26 , and the communication channel 26 is set inside the plate frame 1 . In order to facilitate the communication between the water outlet gap on the diaphragm 2 and the water outlet hole 23 , a water filter groove 223 is provided on the diaphragm 2 , and the water filter gap 222 communicates with the water outlet hole 23 through the water filter groove 223 . When using a filter press to squeeze and dewater sludge, multiple filter plates are stacked together, and a sludge cavity is formed between the opposite diaphragms 2 of two adjacent filter plates. In order to prevent the sewage in the sludge from The bonding surface of two adjacent filter plates seeps out, and a ring of sealing lips 224 can be provided at the edge of the outer surface 22 of the diaphragm 2. When multiple filter plates are stacked, the opposing diaphragms on two adjacent filter plates will The sealing lips 224 of the filter plates 2 are attached and pressed tightly together, so that sewage cannot seep out from the joint surfaces of two adjacent filter plates.

The diaphragm 2 on both sides of the filter plate can be made of rubber. In order to pass the pressure medium into the medium cavity 14 of the filter plate and use the pressure to squeeze out the water in the sludge cavity, it can also flow to the medium of the filter plate. A heat medium is passed into the cavity 14 to heat the sludge in the sludge cavity, so that the moisture in the sludge in the sludge cavity is vaporized and escapes. The diaphragm 2 on both sides of the filter plate can be made of heat-conducting rubber. Since the filter press area 226 on the outside of the diaphragm 2 is provided with a plurality of projections 221, the heat dissipation area is increased, and the heat of the heat medium introduced into the medium chamber 14 can be transferred to the sludge in the sludge chamber more quickly. The moisture in the sludge can be vaporized and escaped quickly.

The above is only the preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the utility model, some improvements and replacements can also be made. And replacement should also be regarded as the protection scope of the present utility model.

Claims (10)

1. The filter plate of the filter press, including the plate frame (1), the diaphragm (2) made of elastic material is arranged on both sides of the plate frame (1), the diaphragm (2) between the plate frame (1) and the two sides of the diaphragm (2) The space is closed into a medium cavity (14) that can be filled or discharged with pressure medium; the diaphragm (2) includes an inner surface (21) for contacting with pressure medium, and an outer surface (22) for contacting with sewage, A sludge hole (225) is provided in the middle of the diaphragm (2), and a sludge channel (25) is provided between the sludge holes (225) of the diaphragm (2) on both sides of the plate frame (1). A water outlet channel (15) is provided, and it is characterized in that: a pressure filter area (226) is provided on the outer surface (22) of the periphery of the sludge hole (225), and a plurality of protrusions are arranged in the filter pressure area (226). from (221). 2. The filter plate of a filter press according to claim 1, wherein the elastic material is rubber. 3. The filter plate of a filter press according to claim 1, wherein the elastic material is heat-conducting rubber. 4. The filter plate of the filter press according to claim 1, characterized in that: the diaphragm (2) is provided with a through water outlet hole (23), and a filter plate is formed between the plurality of protrusions (221). Water gaps (222), the water filtering gaps (222) communicate with each other and communicate with the water outlet holes (23), and the water outlet holes (23) communicate with the water outlet channels (15). 5. The filter plate of a filter press according to claim 4, characterized in that: the water outlet holes (23) are located at the periphery of the filter press area (226). 6. The filter plate of the filter press according to any one of claims 1 to 5, characterized in that: the diaphragm (2) is provided with a water filter tank (223), and the water filter gap (222) is in contact with the filter plate The water outlet holes (23) are communicated through a water filter tank (223). 7. The filter plate of a filter press according to any one of claims 1 to 5, characterized in that: the protrusion (221) is columnar, and the top of the protrusion (221) is flat. 8. The filter plate of a filter press according to any one of claims 1 to 5, characterized in that: the protrusions (221) are evenly distributed in the filter press area (226). 9. The filter plate of a filter press according to any one of claims 1 to 5, characterized in that: a ring of sealing lips (224) is provided at the edge of the outer surface (22) of the diaphragm (2). 10. The filter plate of the filter press according to any one of claims 1 to 5, characterized in that: on the inner side (21) near the outer edge, there is a plate frame (1) for matching with the filter plate The sealing ring (24), the water outlet hole (23) is located outside the sealing ring (24), and the sludge hole (225) is located inside the sealing ring (24).