TWI519335B - Manufacturing of filter plate of filter press and filter plate of filter press - Google Patents

Description

Filter filter filter plate manufacturing method and filter press filter plate

The invention relates to a method for manufacturing a filter plate of a filter press, in particular to a method for manufacturing a filter press filter plate in which a filter screen and a filter plate body are integrated.

A filter press filter plate is prepared by compressing or injection molding to form a filter plate, and when filtering, the filter plate is covered with a filter cloth, and the sludge to be treated is introduced into the high pressure by two. Filtration is carried out in a filter chamber formed between the filter plates, but since the filter plate and the filter cloth are two independent components, when the high-pressure sludge is introduced into the filter chamber, the filter cloth and the filter plate are easily mutually exchanged. Friction causes the filter cloth to rupture. Therefore, in the conventional filter press equipment, the cost of purchasing the filter cloth is high, and in addition, if the pressure filtration is performed only in a high pressure manner, generally only the moisture content of the sludge can be reduced to 80. About %, the water content of the filter cake obtained after the pressure filtration is too high and usually contains a plurality of dissolved pollutant ions, so that the filter cake needs to be processed by an additional procedure before being transported and buried, resulting in a sludge treatment station. The cost of the need is still too high.

The main object of the invention is to integrate the filter screen and the filter plate body into one body when forming the filter plate body, which can greatly increase the bonding strength between the filter screen and the filter plate body, thereby not only minimizing the damage of the filter mesh but also filtering the filter. The filter plate does not need to be additionally configured.

The secondary objective of the present invention is to assist the sludge dehydration by electric power, and by applying an electric field to the filter screen, the sludge is not only subjected to high pressure pushing to remove the free water on the surface of the sludge, but also can be assisted by electric power. More effective removal of interstitial water and surface adhering water between sludge particles, not only can reduce the water content of the filter cake after dewatering to about 60% or less, but also remove various dissolved pollution contained in the sludge. The ions can greatly reduce the cost of subsequent processing of the filter cake.

The method for manufacturing a filter press filter plate of the present invention comprises pre-treating at least one filter screen, filling a filler into a plurality of filter holes of the filter mesh; and solidifying the filler filled in the filter holes Forming a filter plate body, the filter plate body having at least one filter surface, the filter mesh is integrated with the filter plate body when the filter plate body is formed, and the filter mesh covers the filter surface; The filler in the filter holes to reveal the filter holes.

A filter press filter plate of the present invention comprises a filter plate body and at least one filter mesh, the filter plate body having at least one ring wall, at least one groove and at least one filter surface, the ring wall surrounding the groove, the filter face a groove bottom surface of the groove, the filter screen has a filter portion, an outer edge portion and a plurality of filter holes, the outer edge portion surrounding the filter portion, the outer edge portion being fitted to the ring of the filter plate body In the wall, the filtering portion covers the filtering surface, and the filtering holes expose the filtering surface of the filter plate body.

The invention integrates the filter screen and the filter plate body into one body, and can greatly increase the bonding strength between the filter screen and the filter plate body, so as to minimize the damage of the filter screen and eliminate the need for the filter plate. In addition, a filter cloth is disposed; in addition, if an electric field is directly applied to the screen, the dewatering rate of the sludge can be greatly improved to reduce the cost of subsequent processing of the filter cake.

Please refer to FIG. 1 , which is a flow chart of a method 10 for manufacturing a filter press filter plate according to the present invention, which is used to manufacture a filter press filter plate. Please refer to Figures 1, 2, 3 and 4, At least one screen 100 is provided in the step of pre-processing 11" of the screen. In the embodiment, the screen 100 is woven by a plurality of transverse ribs 110 and a plurality of longitudinal ribs 120, each of the transverse ribs 110. A plurality of lateral protrusions 111 and a plurality of lateral recesses 112 are formed. One of the vertices 111a of the lateral protrusions 111 forms an upper surface 130. One of the vertices 112a of the lateral recesses 112 forms a lower surface 140. The ribs 110 and the two adjacent longitudinal ribs 120 form a plurality of filter holes 150, and a plurality of flow guiding spaces 160 are formed between the lateral convex portions 111 and the lower surface 140, wherein the flow guiding spaces 160 are located thereon. Between the surface 130 and the lower surface 140, the flow guiding spaces 160 communicate with each other, and the flow guiding spaces 160 communicate with the filtering holes 150. In this embodiment, a flat laminated mesh is taken as an example, but the present invention It is not limited to a flat web. Preferably, the screen 100 is not easily oxygenated. The metal or an alloy, such as stainless steel mesh, titanium mesh.

Referring to Figures 1, 5, 6 and 7, in the step of "pre-treating the screen 11", the screen 100 defines a filter portion 170 and an outer edge portion 180, the outer edge portion 180 surrounding the filter screen 100 a filter portion 170, and a filler 200 is filled in the filter holes 150 of the filter portion 170 of the filter screen 100 and the flow guiding spaces 160. The filler 200 may be selected from carbon paste, carbon paste or plaster. Or, in other embodiments, the filter holes 150 and the flow guiding spaces 160 of the entire screen 100 may be filled with the filler 200 in order to speed up the process. Then, in the step of "curing the filler 12 filled in the filter hole", the screen 100 is heated to solidify the filler 200 filled in the filter holes 150, so that the solidified filler 200 seals the filter portion. The filter holes 150 of the 170 and the flow guiding spaces 160.

Referring to Figures 1, 8, 9 and 10, in the step of forming the filter plate body 13, the screen 100 filled with the filler 200 is placed on a mold (not shown), and then Forming a filter plate body 300 in the mold by a filling, injection or compression process, and since the filter screen 100 filled with the filler 200 has been previously laid on the mold, the screen 100 is on the filter plate body. When the 300 is formed, it is integrated with the filter body 300. The filter body 300 is formed with at least one ring wall 310 and at least one groove 320. The ring wall 310 surrounds the groove 320. The groove 320 has a groove. The bottom surface 321 is the filter surface 330 of the filter plate body 300, and the outer edge portion 180 of the filter screen 100 is fitted to the filter plate body 300 in the process of forming the filter plate body 300. In the ring wall 310. Further, in the step of "pre-treating the screen 11", since the outer edge portion 180 of the screen 100 is not sealed by the filler 200, the molding material of the filling, injection or compression process can flow into the mold The filter holes 150 of the outer edge portion 180 and the flow guiding spaces 160 enable the screen 100 to be more stably coupled to the filter plate body 300. The filter portion 170 of the filter screen 100 is sealed by the filler 200, so that the molding material of the filling, injection or compression process cannot flow into the filter holes 150 of the filter portion 170 and the flow guiding spaces 160. The molding material is blocked by the screen 100 filled with the filler 200 to form the filtering surface 330 of the filter plate body 300. Therefore, after the process is finished demolding, the filtering portion 170 of the screen 100 covers the filter plate body. The filter surface 330 of the 300, and the lower surface 140 is located between the upper surface 130 and the filter surface 330 of the filter plate body 300.

Or in other embodiments, the filter plate body 300 can be formed in a 3D printing manner, and the screen 100 is integrated with the filter plate body 300.

Referring to FIG. 9 again, in the step of forming the filter plate body 13 , the outer edge portion 180 of the filter screen 100 extends with at least one conductive member 190. The conductive member 190 is formed. The step of the filter plate body 300 is embedded in the ring wall 310 of the filter plate body 300, and the conductive member 190 is exposed on the ring wall 310 of the filter plate body 300. The conductive member 190 is configured to receive a voltage or a current. And is conducted to the filter portion 170. The conductive element 190 can be selected from a conductive filter (not shown) extending from the outer edge portion 180 of the screen 100, a conductive metal rod or a wire, and the conductive element 190 has a The guiding end 191 and the conducting end 192 are exposed on the ring wall 310 of the filter board body 300. The conducting end 192 is embedded in the ring wall 310 and electrically connected to the filter net 100. The rim portion 180 is configured to receive the voltage or the current, and since the screen 100 is electrically conductive, the voltage or the current may be further transmitted to the filter 100 through the conductive end 192. Part 170.

Please refer to Figures 1, 11, 12 and 13 again to remove the filler 14 filled in the filter. In the step of removing the filler 200 by a removing agent (not shown) to expose the filter holes 150 and the flow guiding spaces 160, the filter press F of the present invention is completed. Wherein the remover may be selected from the group consisting of acetone, commercial detergents or acidic solvents and the like. Referring to Figures 12 and 13, the filter portion 170 of the filter screen 100 covers the filter surface 330 of the filter plate body 300. The flow guide spaces 160 and the filter surface 330 of the filter plate body 300 constitute a flow guide. Therefore, when a sludge to be treated (not shown) is filtered through the filter hole 150 of the screen 100, the filtrate can flow through the guide channel P to the ring wall 310 of the filter plate body 300. Thereafter, a plurality of liquid discharge holes (not shown) of the filter plate body 300 are discharged.

Referring to Fig. 14, a concave plate filter press using the filter unit F of the filter press, wherein the groove 320 of the adjacent two filter plate bodies 300 constitutes a filter chamber H, and a stain to be treated The mud 400 is injected into the filter chambers H at a high pressure, and filtered through the screens 100, and a voltage or a current can be applied from the conductive elements 190 of each of the screens 100 while being filtered, and the electric power is used to assist the The treated sludge 400 is dehydrated, and the polarity of the applied voltage is as shown in the figure. In the same filter chamber H, the two screens 100 are subjected to different voltage polarities, wherein the filter 100 has filtration at the same time. And as an effect of the electrode, the screen 100 directly contacts the sludge 400 to be treated during filtration, so that the sludge 400 to be treated can be directly subjected to electrodynamic force, and the dewatering of the filter press is improved. The efficiency of the filter cake can be reduced to about 60% or less, which can greatly reduce the cost of subsequent processing.

Referring to FIG. 14 , since the screen 100 of the present invention is directly fitted into the ring wall 310 of the filter plate body 300, when the filter press performs pressure filtration, the two different screens 100 are not different. Will contact each other, can avoid the short circuit of the two different screens 100 contact. The conductive element 190 for receiving the electric power is directly embedded in the ring wall 310 of the filter plate body 300, and the sealing of the filter chambers H can be ensured to prevent the sludge 400 or the filtrate to be treated from leaking out. . In addition, when the filter press F of the filter press is used, a sacrificial metal piece having a large reduction potential (not shown) may be mounted on the filter net 100 to extend the filter. The service life of the net 100.

Please refer to Fig. 15, which is a plate and frame filter press using the filter press F, which differs from the gravure filter press in that a filter frame is additionally arranged between the filter presses F of the two filter presses. 500, the accommodating space of the filter frame 500 and the filter press filter plate F constitute the filter chamber H. Similarly, in use, the sludge 400 to be treated is injected into the filter chambers H at a high pressure. And filtering through the screens 100, and applying voltage or current to the conductive elements 190 of each of the screens 100 while filtering, and assisting the dewatering of the sludge 400 to be treated by electric power to make the filter cake The moisture content can be reduced to about 60% or less, and since the filter press F and the filter frame 500 are separable components, the filtered filter cake can be easily taken out.

The scope of the present invention is defined by the scope of the appended claims, and any changes and modifications made by those skilled in the art without departing from the spirit and scope of the invention are within the scope of the present invention. .

10‧‧‧Preparation method of filter press filter plate

11‧‧‧Pre-treatment of the filter

12‧‧‧Cure the filler filled in the filter hole

13‧‧‧ Forming the filter plate body

14‧‧‧Remove the filler filled in the filter hole

100‧‧‧ filter

110‧‧‧ transverse ribs

111‧‧‧lateral convex

111a‧‧‧ vertex

112‧‧‧ transverse recess

Vertex 112a‧‧‧

120‧‧‧ longitudinal ribs

130‧‧‧Upper surface

140‧‧‧lower surface

150‧‧‧filter holes

160‧‧‧ Diversion space

170‧‧‧Filter Department

180‧‧‧The outer edge

190‧‧‧Conductive components

191‧‧‧Guide end

192‧‧‧transmitted end

200‧‧‧Filling

300‧‧‧ filter plate body

310‧‧‧ ring wall

320‧‧‧ Groove

321‧‧‧Slot bottom

330‧‧‧Filter surface

400‧‧‧Sludge to be treated

500‧‧‧ filter frame

P‧‧‧ Guide channel

F‧‧‧ filter press filter plate

H‧‧ filter room

Figure 1 is a flow chart showing a method of fabricating a filter press filter according to an embodiment of the present invention. Fig. 2 is a plan view and a partial enlarged view of a screen according to an embodiment of the invention. Figure 3 is a cross-sectional view and a partial enlarged view of the screen according to an embodiment of the present invention. Fig. 4 is a partial perspective cross-sectional view of Fig. 2. Figure 5: Top view of the screen filled with a filler in accordance with one embodiment of the present invention. Figure 6 is a cross-sectional view of the screen filled with the filler in accordance with an embodiment of the present invention. Fig. 7 is a partial perspective sectional view of Fig. 5. Figure 8 is a plan view of a filter plate body and the screen according to an embodiment of the present invention. Figure 9 is a cross-sectional view of the filter body and the screen in accordance with an embodiment of the present invention. Fig. 10 is a partial perspective sectional view of Fig. 8. Figure 11 is a plan view of a filter press filter plate in accordance with an embodiment of the present invention. Figure 12 is a cross-sectional view of a filter press filter plate in accordance with an embodiment of the present invention. Fig. 13 is a partial perspective sectional view of Fig. 11. Figure 14: Schematic diagram of a gravure filter press. Figure 15: Schematic diagram of a plate and frame filter press.

10‧‧‧Preparation method of filter press filter plate

11‧‧‧Pre-treatment of the filter

12‧‧‧Cure the filler filled in the filter hole

13‧‧‧ Forming the filter plate body

14‧‧‧Remove the filler filled in the filter hole

Claims (13)

A method for manufacturing a filter press filter plate, comprising: pre-treating at least one filter mesh, filling a filler into a plurality of filter holes of the filter mesh; and solidifying the filler filled in the filter holes Forming a filter plate body, the filter plate body having at least one filter surface, the filter mesh is integrated with the filter plate body when the filter plate body is formed, and the filter mesh covers the filter surface; The filler in the filter holes to reveal the filter holes. The method for manufacturing a filter press filter plate according to claim 1, wherein the filter net has a plurality of flow guiding spaces, an upper surface and a lower surface, wherein the flow guiding spaces are located on the upper surface and the lower surface And the flow guiding spaces are connected to the filter holes, wherein when the filter is pre-treated, the filler is filled in the flow guiding spaces, and when the filter mesh and the filter plate body are integrated into one body, The lower surface is located between the upper surface and the filtering surface of the filter plate body. The method of manufacturing a filter press filter plate according to claim 2, wherein the filter mesh has a plurality of transverse ribs, each of the transverse ribs having a plurality of lateral convex portions and a plurality of lateral concave portions, the lateral convex portions One of the vertices constituting the upper surface, and one of the vertices of the lateral recesses constitutes the lower surface, and the flow guiding spaces are formed between the lateral convex portions and the lower surface, and the guiding spaces and the filter body are The filtering surface constitutes a flow guiding channel. The method of manufacturing a filter press filter plate according to the first, second or third aspect of the invention, wherein the filter screen is electrically conductive. The method for manufacturing a filter press filter plate according to claim 1, wherein the process of forming the filter plate body may be selected from the group consisting of injection molding, injection molding, compression molding or 3D printing. The method of manufacturing a filter press filter plate according to claim 1, wherein the filter plate body has at least one groove and at least one ring wall, the ring wall surrounds the groove, and the filter surface is the groove a filter bottom surface, the filter screen has a filter portion and an outer edge portion, the outer edge portion surrounds the filter portion, wherein in the step of forming the filter plate body, the outer edge portion is fitted to the filter plate body In the ring wall, the filter portion covers the filter surface. The method for manufacturing a filter press filter plate according to claim 6, wherein the outer edge portion of the filter mesh extends with a conductive member, the conductive member having a conductive end and a conductive end, the conductive element The conductive end is embedded in the ring wall of the filter plate body in the step of forming the filter plate body, and the conductive end is electrically connected to the outer edge portion of the filter mesh, and the conductive end of the conductive component is exposed to the The ring wall of the filter plate body, the guiding end is configured to receive a voltage or a current, and the voltage or the current is conducted by the conducting end to the filtering portion of the filter mesh, wherein the conductive component is selected from the group consisting of A conductive metal rod or a wire. The method of manufacturing a filter press filter plate according to claim 1, wherein the filler may be selected from carbon paste, carbon paste or gypsum, and the filler filled in the filter holes is removed. In the step, the filler is removed with a remover, wherein the remover may be selected from acetone, a commercial wash or an acidic solvent. A filter press filter plate, comprising: a filter plate body having at least one ring wall, at least one groove and at least one filter surface, the ring wall surrounding the groove, the filter surface being a groove bottom surface of the groove; And at least one filter screen having a filter portion, an outer edge portion and a plurality of filter holes, the outer edge portion surrounding the filter portion, the outer edge portion being fitted into the ring wall of the filter plate body, the filter portion The filter surface is covered, and the filter holes expose the filter surface of the filter plate body. The filter press filter plate of claim 9, wherein the filter screen has a plurality of flow guiding spaces, an upper surface and a lower surface, and the flow guiding spaces are located between the upper surface and the lower surface, And the flow guiding spaces are connected to the filter holes, and the lower surface is located between the upper surface and the filtering surface of the filter plate body. The filter press filter plate of claim 10, wherein the filter screen has a plurality of transverse ribs, each of the transverse ribs having a plurality of lateral convex portions and a plurality of lateral concave portions, one of the lateral convex portions Forming the upper surface, one of the vertices of the lateral recesses constitutes the lower surface, and the flow guiding spaces are formed between the apex of the lateral convex portions and the lower surface, and the flow guiding spaces and the filter body The filtering surface constitutes a flow guiding channel. The filter press filter plate of claim 9, 10 or 11, wherein the filter screen is electrically conductive. The filter press filter plate of claim 9, wherein the outer edge portion of the filter mesh extends with a conductive member having a conductive end and a conductive end, the conductive end of the conductive member Buried in the ring wall of the filter body, and the conductive end is electrically connected to the outer edge of the filter, the guiding end of the conductive component is exposed on the ring wall of the filter body, the guiding end For receiving a voltage or a current, and conducting the voltage or the current to the filter portion of the filter by the conducting end, wherein the conductive element may be selected from a conductive metal rod or a wire.