CN210645276U

CN210645276U - Filter press

Info

Publication number: CN210645276U
Application number: CN201920593880.6U
Authority: CN
Inventors: 刘波; 罗泽良; 王鸿; 刘兵
Original assignee: Huahui Ecological Environment Industry Co ltd
Current assignee: Huahui Ecological Environment Industry Co ltd
Priority date: 2019-02-03
Filing date: 2019-04-26
Publication date: 2020-06-02
Anticipated expiration: 2029-04-26
Also published as: CN110170188A

Abstract

The filter press comprises a frame, a filter pressing cavity, a pressing plate and a filter plate, wherein the pressing plate and the filter plate are arranged in the filter pressing cavity; the pressing plate is provided with at least one pressing plate drain hole and at least one drain pipe; the press plate drain hole extends upwards from the bottom surface of the press plate; a drain pipe extends from the side wall of the pressure plate to the inside of the pressure plate and is communicated with a drain hole, and the number of the drain pipes is less than or equal to that of the drain holes; and a sludge inlet is formed in the side wall of the filter pressing cavity and communicated with the inside of the filter pressing cavity. The utility model discloses a be provided with the wash port on the clamp plate and with the drain pipe of wash port intercommunication, outside the lateral wall that the drainage end of drain pipe accesss to the clamp plate, make the clamp plate have unblocked drain line, mud filtrating can in time discharge through wash port and drain pipe, sets up into mud mouth simultaneously on the filter-pressing chamber lateral wall, can realize evenly advancing mud fast, has improved filter-pressing efficiency, has reduced the energy consumption, is favorable to reducing the final moisture content of mud.

Description

Filter press

Technical Field

The utility model belongs to the technical field of sludge treatment, especially, relate to a sludge filter press.

Background

The filter press is equipment for deeply dehydrating sludge by adopting a filter pressing process, and the primary sludge is dehydrated by the filter press to form a mud cake with lower water content. The types of conventional filter presses are: common plate and frame filter presses, chamber plate and frame filter presses, diaphragm plate and frame filter presses, and high-pressure vertical filter presses. The filter press mainly comprises a frame, a hydraulic cylinder, a filter pressing cavity, a filter plate assembly and a pressing plate, wherein the pressing plate is arranged in the filter pressing cavity and can move along the axis direction of a piston rod of the hydraulic cylinder under the driving of the hydraulic cylinder, so that the sludge in the filter pressing cavity is subjected to filter pressing. Sludge can produce a large amount of filtrates in the filter pressing process, how to discharge the filtrates in time and smoothly, improve the filter pressing efficiency, and the reduction of the water content of the sludge is the key research and development content of various filter pressing equipment manufacturers.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a can in time drainage, effectual pressure filter of filter-pressing.

In order to achieve the above object, the present invention adopts the following technical solutions:

the filter press comprises a frame, a filter pressing cavity, a pressing plate and a filter plate, wherein the pressing plate and the filter plate are arranged in the filter pressing cavity; the pressing plate is provided with at least one pressing plate drain hole and at least one drain pipe; the press plate drain hole extends upwards from the bottom surface of the press plate; one drain pipe extends from the side wall of the pressing plate to the inside of the pressing plate and is communicated with one drain hole, and the number of the drain pipes is less than or equal to that of the drain holes; and a sludge inlet is formed in the side wall of the filter-pressing cavity and communicated with the inside of the filter-pressing cavity.

Further, the press plate water drain hole penetrates through the press plate.

Furthermore, the drain pipe is arranged in the middle or at the upper part of the pressing plate, and the drainage end of the drain pipe is flush with or extends out of the side wall of the pressing plate.

Furthermore, the drainage end of the drainage pipe is flush with the side wall of the pressing plate; and a side wall drain hole is formed in the side wall of the filter pressing cavity, and when the pressing plate moves downwards to extrude sludge in the filter pressing cavity, the drain pipe is communicated with the side wall drain hole.

Furthermore, the press plate drain holes are uniformly distributed on the press plate in an array mode, and at least the press plate drain holes positioned on the periphery are provided with drain pipes communicated with the press plate drain holes.

Further, the hole opening of the press plate drain hole is provided with a chamfer.

Furthermore, a water drainage groove is arranged on the end face of the pressing plate, which is provided with a hole of the pressing plate drainage hole, and the water drainage groove is connected with the pressing plate drainage hole.

Furthermore, the mud inlets are uniformly arranged on the side wall of the filter-pressing cavity at intervals along the circumferential direction.

Furthermore, a sealing groove is formed in the bottom of the side wall of the filter pressing cavity, and a sealing gasket is arranged in the sealing groove.

Furthermore, a connecting part protruding outwards from the side wall is arranged on the side wall of the pressure filtration cavity, a fixing through hole is arranged on the connecting part, and the axis of the fixing through hole is parallel to the axis of the pressure filtration cavity; and the pressure filtration cavity is connected with a connecting plate arranged on the top surface of the pressure plate through a connecting piece penetrating through the fixing through hole.

Furthermore, a plurality of filter plate drain holes penetrating through the filter plate body are formed in the filter plate, a drain groove is formed in the surface of at least one side of the filter plate, each filter plate drain hole is communicated with the adjacent filter plate drain hole through at least one drain groove, and the drain grooves form a mutually connected net-shaped structure.

Furthermore, at least one end part of the filter plate drain hole is provided with a chamfer.

Furthermore, the filter press comprises a plurality of filter pressing cavities which are stacked in sequence, a connecting plate is arranged between every two adjacent filter pressing cavities, the connecting plate is connected with the top surface of the pressing plate, a plurality of connecting plate drain holes penetrating through the connecting plate are formed in the connecting plate, and fixing connecting holes for bolts to penetrate through are formed in the periphery of the connecting plate drain holes.

Furthermore, at least one side surface of each connecting plate is provided with a drainage groove, each drainage hole of each connecting plate is communicated with the adjacent drainage hole of the connecting plate through at least one drainage groove, and the drainage grooves form a mutually connected net-shaped structure.

Furthermore, at least one end part of the drain hole of the connecting plate is provided with a chamfer.

Furthermore, the connecting plate supports the filter pressing cavity above the connecting plate and is connected with the filter pressing cavity below the connecting plate through a bolt penetrating through the fixed connecting hole.

Furthermore, an elastic element is arranged between the connecting plate and the filter pressing cavity below the connecting plate.

furthermore, a filter screen and/or filter cloth is arranged on the bottom surface of the filter plate, the filter screen and/or filter cloth is connected with the filter plate through a pressure guard plate and a threaded connecting piece, the pressure guard plate is annular, a fixing through hole is formed in the pressure guard plate, an included angle β between the outer side wall of the pressure guard plate and the upper end surface of the pressure guard plate is less than or equal to 90 degrees, and an included angle beta between the inner side wall of the pressure guard plate and the upper end surface of the pressure guard plate is less than or equal to 90 degrees.

furthermore, an included angle β between the outer side wall of the pressure protection plate and the upper end face of the pressure protection plate is less than 90 degrees, and/or an included angle beta between the inner side wall of the pressure protection plate and the upper end face of the pressure protection plate is less than 90 degrees.

Further, the pressure guard plate is of an integrated annular structure; or the pressure guard plate is composed of a plurality of sections of arc-shaped plates which are arranged along the circumference, the arc-shaped plates are arranged at intervals or are arranged adjacently, and the adjacent arc-shaped plates can be connected together or not.

Further, the pressure protection plate comprises pressure protection plates with different diameters, and the pressure protection plate with the small diameter is arranged in the annular area of the pressure protection plate with the large diameter.

According to the technical scheme provided by the utility model, the utility model discloses a be provided with the wash port on the clamp plate and with the drain pipe of wash port intercommunication, outside the lateral wall that the drainage end of drain pipe accesss to the clamp plate, the clamp plate has unblocked drain line, has reduced the drainage resistance, and the filtrating that mud produced at the filter-pressing in-process can in time be discharged through wash port and drain pipe, has improved drainage speed and has increased the displacement to can shorten the filter-pressing time, improve filter-pressing efficiency, reduce the energy consumption, be favorable to reducing the final moisture content of mud. And because the filter-pressing water in the filter press can be discharged in time, the pressure in the filter-pressing cavity is effectively reduced, and the frame explosion phenomenon of the filter press, especially the plate-and-frame filter press, can be avoided during filter pressing. Moreover, the utility model changes the traditional central mud feeding mode by arranging the mud feeding port on the side wall of the filter pressing cavity, and the mud is fed from the side surface of the filter pressing cylinder, so that the mud feeding is more uniform, and the mud feeding speed can be obviously improved under the condition of arranging a plurality of mud feeding ports; simultaneously, sludge is fed from the side, the sludge distribution is more uniform, the sludge is stressed under uniform pressure, the sludge stress at the central position of the center in the sludge feeding at the center is not constant, and the condition that the water content does not reach the standard after filter pressing is easily caused by pressure attenuation is avoided.

Drawings

In order to illustrate the embodiments of the present invention more clearly, the drawings that are needed in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained by those skilled in the art without inventive effort.

FIG. 1 is a schematic structural view of a filter pressing assembly in embodiment 1 of the present invention;

FIG. 2 is a schematic bottom view of a pressing plate according to embodiment 1 of the present invention;

3 FIG. 3 3 3 is 3a 3 cross 3- 3 sectional 3 view 3 taken 3 along 3 line 3A 3- 3A 3 of 3 FIG. 3 2 3; 3

FIG. 4 is a schematic diagram of the position of a pressure plate during filter pressing;

FIG. 5 is a top view of a filter pressing chamber according to an embodiment of the present invention;

FIG. 6 is a cross-sectional view taken along line B-B of FIG. 5;

FIG. 7 is a schematic view of the connection between the filter pressing chamber and the connection plate according to the embodiment of the present invention;

FIG. 8 is a schematic view of a press assembly incorporating a press plate according to example 2 of the present invention;

fig. 9 is a schematic structural view of a pressing plate according to embodiment 3 of the present invention;

FIG. 10 is a cross-sectional view taken along line C-C of FIG. 9;

FIG. 11 is a schematic view of a press assembly incorporating a press plate according to example 4 of the present invention;

fig. 12 is a schematic structural view of a connecting plate according to embodiment 4 of the present invention;

FIG. 13 is a cross-sectional view taken along line D-D of FIG. 12;

FIG. 14 is a schematic structural view of a multi-layer filter press according to example 4 of the present invention;

fig. 15 is a schematic view of the connection between the connection plate and the filter pressing cavity according to embodiment 4 of the present invention;

FIG. 16 is a schematic view of a filter pressing assembly according to embodiment 4 of the present invention;

FIG. 17 is a schematic view of a filter pressing assembly of the present invention during sludge discharge according to embodiment 4;

FIG. 18 is a schematic view of a press assembly incorporating a press plate according to example 5 of the present invention;

fig. 19 is a schematic structural view of a filter plate according to embodiment 6 of the present invention;

FIG. 20 is a cross-sectional view taken along line E-E of FIG. 19;

fig. 21 is a schematic view of a filter plate assembly according to embodiment 6 of the present invention;

fig. 22 is a schematic structural view of a guard plate according to embodiment 6 of the present invention;

FIG. 23 is a cross-sectional view taken along line F-F of FIG. 22;

fig. 24 is a schematic structural view of the split type pressure guard plate.

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings, wherein for convenience of illustration, the drawings showing the structure of the device are not to scale and are partially enlarged, and the drawings are only examples, which should not limit the scope of the invention. It should be noted that the drawings are in simplified form and are not to precise scale, which is only used for the purpose of facilitating and clearly assisting in the description of the embodiments of the present invention.

Example 1

The filter press generally comprises a frame, a hydraulic cylinder, a pressure plate, a filter plate assembly and a filter pressing cavity, wherein the pressure plate, the filter plate assembly and the filter pressing cavity form a filter pressing assembly of the filter press. As shown in fig. 1, the pressing plate 1 is disposed in the filter pressing chamber 6, the filter pressing chamber 6 is a hollow cavity, and a filter cloth 5 is disposed at the bottom of the filter pressing chamber 6. The pressure plate 1 is arranged in the filter pressing cavity 6 in a way of reciprocating along the axial direction of the filter pressing cavity 6. The filter plate component is connected with the pressing plate 1 and comprises a filter plate 3, a filter screen 4 and filter cloth 5, and the filter plate 3 is arranged below the pressing plate 1 and is connected with the pressing plate 1 through a threaded fastener. The filter screen 4 and the filter cloth 5 are arranged on the bottom surface of the filter plate 3 in sequence and are connected and fixed with the filter plate 3 through threaded fasteners. A filter plate drain hole (not shown) is formed in the filter plate 3 so as to penetrate the filter plate 3. The pressing plate 1 presses the sludge in the filter pressing cavity 6 when moving downwards, so that the sludge in the filter pressing cavity 6 is subjected to filter pressing.

Referring to fig. 2 and 3, the pressing plate 1 of the present embodiment is a circular plate, and the material of the pressing plate 1 may be cast iron, stainless steel, aluminum alloy, plastic, composite polymer material, alloy steel, or the like. A plurality of press plate drain holes 1a are processed on the press plate 1, four symmetrically arranged press plate drain holes 1a are arranged on the press plate 1 in the embodiment, and the press plate drain holes 1a are arranged near the side wall (peripheral wall) of the press plate 1. For convenience of description, an end surface of the pressure plate 1 opposite to the filter plate assembly is defined as a bottom surface. The platen drain hole 1a extends upward from the bottom surface of the platen 1, and the platen drain hole 1a of the present embodiment extends to the upper portion of the platen 1 without penetrating the platen 1. The pressure plate 1 is provided with a drain pipe 2 extending from the side wall of the pressure plate 1 into the pressure plate 1, one end (drain end) of the drain pipe 2 extends out of the pressure plate 1, and the other end is communicated with a drain hole 1a of the pressure plate, and the drain pipe 2 of the present embodiment is located at the upper part of the pressure plate 1 and extends along the radial direction of the pressure plate 1. The press plate drain hole 1a and the drain pipe 2 form a drain channel inside the press plate 1, and filtrate generated in the press filtration process can be drained out of the press plate 1 through the drain pipe 2 after entering the press plate drain hole 1 a. The inner diameter of the drain pipe 2 and the diameter of the press plate drain hole 1a may be equal or unequal, and the inner diameter of the drain pipe 2 and the diameter of the press plate drain hole 1a in the present embodiment are equal.

Preferably, the bottom surface of the pressing plate 1 is further provided with drainage grooves b recessed into the pressing plate 1, the drainage grooves b can respectively extend along the longitudinal direction and the transverse direction and communicate the drainage holes 1a of the pressing plate to form a drainage network, so that when the pressing plate 1 performs pressure filtration on sludge, generated filtrate can be guided into the drainage holes 1a of the pressing plate through the drainage grooves b on the bottom surface of the pressing plate 1 and flows out from the drainage pipes 2 communicated with the drainage holes 1a of the pressing plate. The drainage groove b can reduce drainage resistance, thereby shortening filtrate discharge time. The cross-sectional shape of the drain groove b may be various shapes such as a semicircle, a square, a triangle, etc. The pressure plate 1 is also provided with threaded holes c for mounting and securing to other components of the press assembly.

In a more preferred embodiment, a chamfer a is formed at the lower end (lower orifice) of the press plate drain hole 1a, and the chamfer is provided at the end of the press plate drain hole 1a, whereby the fluid resistance of the sludge drain water during outflow can be reduced, the drain hole is less likely to be clogged, and the drainage speed of the drain water can be increased.

In the embodiment, the drain pipe 2 is arranged on the upper portion of the pressing plate 1, fig. 1 is a state schematic diagram when the pressing plate 1 is not pressed down, when no press filtration is performed, the pressing plate 1 and the filter plate assembly are located on the upper portion of the press filtration cavity 6 together, pressure is transmitted to the pressing plate 1 along with the hydraulic cylinder, the pressing plate 1 and the filter plate assembly move downwards together, sludge in the press filtration cavity 6 is pressed, water in the sludge is extruded along with the pressing plate 1, filtrate sequentially penetrates through the filter cloth 5, the filter screen 4 and the filter plate 3, enters the press plate drain hole 1a of the pressing plate 1, and is discharged out of the press filtration cavity 6 through the drain pipe 2 along the direction indicated by an arrow in fig. 4.

The pressure plate 1 and the filter plate assembly form a whole under the connection action of the threaded fasteners, the whole can reciprocate up and down in the filter pressing cavity 6 in the filter pressing process, when the whole rises to move to an upper end limit position, a sealing belt height difference delta H is formed between the bottom surface of the filter plate 3 and the upper end surface of the filter pressing cavity 6, and the height difference delta H is generally larger than 5mm, so that sludge is prevented from overflowing in a high-pressure state in the filter pressing process.

The cross section of the pressure plate drain hole and the cross section of the filter plate drain hole are preferably circular, the diameter of the pressure plate drain hole and the diameter of the filter plate drain hole can be equal or unequal, and in order to reduce the fluid resistance of the filtrate in the drainage flow process, the diameter of the pressure plate drain hole and the diameter of the filter plate drain hole are preferably equal.

Fig. 5 and 6 are schematic structural views of the filter pressing chamber 6 of the present embodiment, as shown in fig. 5 and 6, the filter pressing chamber 6 is a circular hollow cavity, mud inlets 6a are formed on the cylinder wall (side wall) of the filter pressing chamber 1 at intervals along the circumference, and preferably, the number of the mud inlets 6a is even and the mud inlets are uniformly and symmetrically distributed at intervals along the circumference. The sludge can be fed into the filter pressing cavity 6 from the side of the filter pressing cavity 6 through a sludge inlet 6a on the cylinder wall. The mode that adopts the side to advance mud can make mud evenly send to filter-pressing chamber 6 in, and a plurality of mud mouths of advancing advance mud simultaneously can improve into mud speed, can also avoid the mud of filter-pressing chamber central point position that traditional filter press center advances mud mode and exists because of the pressure decay's that the atress is invariable exists at the filter-pressing in-process problem moreover. The filter-pressing cavity 6 can be made of cast iron, stainless steel, aluminum alloy, alloy steel and other materials.

It is further preferred that a connecting part 6-1 which projects radially outward from the cylinder wall is provided on the outer side (side wall) of the cylinder wall above the filter pressing chamber 6, the connecting part 6-1 forming an annular flange on the cylinder wall. The connecting part 6-1 is provided with fixing through holes 6-1a arranged at intervals along the circumference, and the axes of the fixing through holes 6-1a are parallel to the axis of the filter pressing cavity 6. The fixing through hole 6-1a is used for being matched with threaded connecting pieces such as bolts and studs and connecting the filter pressing cavity 6 with the connecting plate 8 positioned above the filter pressing cavity 6. Further preferably, a sealing groove (not numbered) is processed at the bottom of the cylinder wall of the filter pressing cavity 6, a sealing gasket 7 is arranged in the sealing groove, and the filter pressing cavity 6 can be tightly contacted with the filter cloth 5 which is installed together with the bottom of the filter pressing cavity 6 through the sealing gasket 7 to form good sealing. The sealing groove of the embodiment continuously extends along the bottom of the cylinder wall of the filter pressing cavity 6 and is an annular groove.

As shown in fig. 7, the pressing plate 1 is connected to the connecting plate 8 through a threaded connection member, the power of the hydraulic cylinder is transmitted to the pressing plate 1 through the connecting plate 8, the pressing plate 1 is driven to move in the pressing chamber 6, and the sludge in the pressing chamber 6 is pressed. The connecting plate 8 is provided with a fixed connecting hole 8a corresponding to the fixed through hole 6-1a on the connecting part 6-1 of the filter pressing cavity 6, and the connecting plate 8 is connected with the filter pressing cavity 6 below the connecting plate by adopting connecting pieces such as bolts, studs and the like, so that the connecting plate 8 and the filter pressing cavity 6 form an inseparable whole and can move relatively along the axial direction of the filter pressing cavity 6. According to the embodiment, the filter pressing cavity 6 and the connecting plate 8 are connected through the stud bolts, the stud bolts penetrate through the fixing through holes 6-1a in the connecting part 6-1 of the filter pressing cavity 6 and the fixing connecting holes 8a in the connecting plate 8, the filter pressing cavity 6 and the connecting plate 8 can be connected after being screwed down, the connecting plate 8 and the filter pressing cavity 6 form a whole, the stud bolts can prevent the filter pressing cavity 6 from radially deviating in the filter pressing process, the filter pressing cavity is guaranteed to move stably and reliably in the filter pressing process, meanwhile, downward pressure borne by the connecting plate 8 can be transmitted to the filter pressing cavity 6, the filter pressing cavity 6 is enabled to be in contact with the filter cloth 5 below the filter pressing cavity, mud leakage is prevented, and the sealing performance of the filter pressing.

Example 2

As shown in fig. 8, the present embodiment is different from embodiment 1 in that: the drain pipe 2 of this embodiment is disposed in the middle of the pressing plate 1, and the drain end of the drain pipe 2 extends to the side wall of the pressing plate 1 and does not extend out of the side wall of the pressing plate 1. The side wall of the filter pressing cavity 6 is provided with a side wall drain hole 6b, the aperture of the side wall drain hole 6b on the filter pressing cavity 6 and the inner diameter of the drain pipe 2 can be equal or unequal, but in order to ensure that filtrate generated in the filter pressing process can be timely discharged, the aperture of the side wall drain hole 6b is preferably set to be larger than the inner diameter of the drain pipe 2. When the pressing plate 1 moves downwards to extrude sludge, the drainage pipe 2 is communicated with the side wall drainage hole 6b in the moving process of the pressing plate 1, so that filtrate in the drainage pipe 2 is drained out of the filter pressing cavity 6. The water discharging pipe 2 can be a pipe body independent of the pressing plate, such as the structure of the embodiment 1, or a pipe processed in the pressing plate, such as the structure of the embodiment, and can be designed according to requirements.

Example 3

Referring to fig. 9 and 10, the present embodiment is different from embodiment 1 in that: the pressing plate drain hole 1a of the embodiment penetrates through the pressing plate 1, the orifices at two ends of the pressing plate drain hole 1a are respectively located on two end faces of the pressing plate 1, and the orifices are provided with rounded corners. The drain pipes 2 communicate with the press plate drain holes 1a partially located at the periphery, whereby the filtrate can be discharged not only from the drain pipes 2 leading to the outside of the side wall of the press plate 1 but also from the top surface of the press plate 1 through the press plate drain holes 1 a. The press plate 1 of the present embodiment can be used in a multilayer filter press comprising a plurality of filter press chambers stacked in the axial direction of the filter press chambers. In the case where the platen has a sufficient position, the drain pipe 2 communicating with a drain hole provided near the inside of the platen 1 may be provided.

Example 4

As shown in fig. 11, the present embodiment is different from embodiment 3 in that: the filter press of the embodiment is a multilayer filter press, the drain pipe 2 on the pressure plate 1 is arranged in the middle of the pressure plate 1, and the drain end of the drain pipe 2 extends out of the side wall of the pressure plate 1. A connecting plate 8 is arranged between adjacent filter pressing cavities of the multilayer filter press, the filter pressing cavity positioned above the connecting plate 8 is placed on the top surface of the connecting plate 8, and the bottom surface of the connecting plate 8 is connected with a pressing plate 1 positioned below the connecting plate.

Referring to fig. 12 and 13, the connecting plate 8 of the present embodiment is a square plate, and the material of the connecting plate 8 may be cast iron, stainless steel, aluminum alloy, plastic, composite polymer material, alloy steel, or the like. A plurality of connecting plate drain holes 8b are processed on the connecting plate 8, and the axes of the connecting plate drain holes 8b are parallel to the axis of the connecting plate 8 and penetrate through the connecting plate 8. The connection plate drain holes 8b of the present embodiment are arranged at regular intervals on the connection plate 8. Preferably, a drainage groove b which is sunken into the filter cavity connecting plate is further formed in the surface of the connecting plate 8 and is used for communicating two adjacent connecting plate drainage holes 8 b. When the connecting plate drain holes 8b are uniformly distributed in an array form, the drain grooves b can transversely and longitudinally communicate the connecting plate drain holes 8b in the same row and the same column to form a mutually communicated drain network, so that when sludge is subjected to filter pressing, filtrate generated in the filter pressing process can directly flow into the connecting plate drain holes 8b, and can also flow to the connecting plate drain holes 8b in the nearby area through the drain grooves b on the surface of the connecting plate 8, and the filtrate can be timely discharged. The drainage groove b can reduce drainage resistance, thereby shortening filtrate discharge time. The drainage channel b may be provided only on one side surface of the connection plate 8, or may be provided on both side surfaces of the connection plate 8, and the cross-sectional shape of the drainage channel b may be various shapes such as a semicircle, a square, a triangle, and the like. The connecting plate 8 is provided with a fixed connecting hole 8a for a bolt to pass through, and is used for realizing the connection between the connecting plate 8 and the filter pressing cavity positioned below the connecting plate. The fixing attachment holes 8a are located at the periphery of the attachment plate drainage holes 8 b. The connecting plate 8 is also provided with a threaded hole c which is used for matching with a bolt for installing the filter screen and/or the filter cloth.

As a preferred embodiment of the utility model, connecting plate wash port 8 b's upper end and lower tip processing have chamfer a, set up the chamfer through the tip at connecting plate wash port 8b, can reduce the fluid resistance of mud drainage in the outflow in-process, make connecting plate wash port 8b difficult the jam, are favorable to accelerating the discharge rate of drainage.

The multilayer filter press is provided with a plurality of filter pressing cavities which are stacked together, a connecting plate is arranged above each filter pressing cavity, and two adjacent filter pressing cavities are separated by the connecting plate. Fig. 14 is a schematic structural diagram of the multi-layer filter press according to the embodiment, and as shown in fig. 14, the multi-layer filter press comprises a frame composed of a frame 200 and a base 201, the frame 200 is mounted on the base 201 of the frame, a hydraulic cylinder 202 is arranged on the top of the frame 200, and the filter press assembly is placed on the base 201. The piston rod of the hydraulic cylinder 202 is connected with a cover plate 203, the cover plate 203 is connected with the connecting plate 8 positioned at the top, and the cover plate 203 can move up and down under the action of the hydraulic cylinder 202, so that the connecting plate 8 (the pressure plate 1) is further driven to move.

As shown in FIG. 15, the press assembly of this embodiment includes two vertically stacked press chambers: go up filter-pressing chamber 60 and lower filter-pressing chamber 61, filter plate subassembly and clamp plate set up in the filter-pressing chamber, and connecting plate 8 sets up between last filter-pressing chamber 60 and lower filter-pressing chamber 61, and last filter-pressing chamber 60 places on connecting plate 8, is supported by connecting plate 8. The lower filter pressing chamber 61 is located below the connecting plate 8 and is connected to the connecting plate 8 by bolts 9. Under the pressure effect, the connecting plate 8 can play radial spacing effect to the lower filter pressing chamber 61 that is located its below, prevents that the filter pressing chamber 61 from taking place radial skew in the filter pressing in-process down. An elastic element 10 is arranged between the connecting plate 8 and the lower filter pressing cavity 61, the elastic element 10 of the embodiment is a spring sleeved on the bolt 9, one end of the spring abuts against the connecting plate 8, and the other end abuts against the filter pressing cavity (connecting part 6-1). The bottom surface of the connecting plate 8 is connected with the pressing plate 1 in the lower filter pressing cavity 61, and the pressing plate 1 can extrude the sludge in the lower filter pressing cavity 61 when moving up and down along with the connecting plate 8. The pressure that the mud received in last filter-pressing chamber 60 and the spring force of the last lamination filter chamber that last filter-pressing chamber 60 received all act on connecting plate 8, the pressure that the connecting plate 8 received continues down to transmit mud (clamp plate 16) in the filter-pressing chamber 61 down to through the spring action filter-pressing chamber 61 down, analogize with this, the pressure that the mud received in lower filter-pressing chamber 61 and the lower filter-pressing chamber 61 continues down to act on next floor filter-pressing chamber connecting plate, accomplish the operating pressure of the top pneumatic cylinder of multilayer sludge filter press from top to bottom and act on each filter-pressing chamber of filter press in proper order, carry out the filter-pressing action (fig. 16). As shown in fig. 17, when discharging the sludge, the filter pressing chamber is sequentially separated from the connecting plate below the filter pressing chamber, and the sludge cake 100 is pushed out to discharge the sludge after the filter pressing chamber is lifted up.

The connecting plate of this embodiment both is the backup pad in its top filter pressing chamber, also is the power transmission board in its below filter pressing chamber, and when the power transmission of sludge filter press pneumatic cylinder was for the connecting plate, the connecting plate was to lower filter pressing chamber and the clamp plate transmission pressure wherein to make lower filter pressing chamber accomplish the filter pressing. Meanwhile, as the drainage through holes are formed in the surface of the connecting plate, when filter pressing is carried out, filtrate generated in the filter pressing process by sludge in the filter cavity above the connecting plate flows out in the directions of arrows in the figure 15 through the filter cloth, the filter screen and the drainage through holes in the connecting plate. The connecting plate is provided with the connecting plate drain hole and the drain groove, so that the fluid resistance encountered in the drainage process is reduced, the drainage channel is smooth, the rapid and uniform drainage is facilitated, no liquid is accumulated, the filter pressing time is greatly shortened, the filter pressing efficiency is improved, and the energy consumption is reduced

Example 5

As shown in fig. 18, this embodiment is different from embodiment 4 in that: the water outlet end of the water outlet pipe 2 of the present embodiment extends to the side wall of the pressure plate 1, and does not protrude from the side wall of the pressure plate 1. And a side wall drain hole 6b is formed in the side wall of the filter pressing cavity 6, and the aperture of the side wall drain hole 6b is larger than the inner diameter of the drain pipe 2. When the pressing plate 1 moves downwards to extrude sludge, the drainage pipe 2 is communicated with the side wall drainage hole 6b in the moving process of the pressing plate 1, so that filtrate in the drainage pipe 2 is drained out of the filter pressing cavity 6. The filtrate can also be discharged from the upper end surface of the platen 1 through the platen drain holes 1a at the same time.

Example 6

As shown in fig. 19 and 20, the filter plate 3 of the present embodiment is a circular plate, and the material of the filter plate 3 may be cast iron, stainless steel, aluminum alloy, plastic, composite polymer material, alloy steel, or the like. A plurality of filter plate drain holes 3a are processed on the filter plate 3, and the filter plate drain holes 3a penetrate through the top surface and the bottom surface of the filter plate 3. The filter plate drain holes 3a of the present embodiment are arranged at regular intervals on the filter plate 3. Threaded holes c are also formed in the filter plate 3 for mounting and fixing the filter plate 3 to other components in the filter press assembly. And a drainage groove b which is sunken into the filter plate is formed in the surface of the filter plate 3 and is used for communicating two adjacent filter plate drainage holes 3 a. When the filter plate drain holes 3a are uniformly distributed in an array form, the drain grooves b can extend transversely and longitudinally to communicate the filter plate drain holes 3a in the same row and the same row to form a mutually communicated drain network, so that when sludge is subjected to filter pressing, filtrate generated in the filter pressing process can directly flow into the filter plate drain holes 3a and can also flow to the filter plate drain holes 3a in the nearby area through the drain grooves b on the surface of the filter plate 3, and the filtrate can be discharged in time. The drainage groove b can reduce drainage resistance, thereby shortening filtrate discharge time. The drainage grooves b may be provided only on one side surface of the filter plate 3, or may be provided on both side surfaces of the filter plate 3, and the cross-sectional shape of the drainage grooves b may be various shapes such as a semicircle, a square, a triangle, and the like. The filter plate 3 is also provided with a abdicating groove 3b which is convenient for other parts of the filter pressing component to be installed and fixed.

Preferably, chamfers a can be processed at the upper end part and the lower end part of the filter plate drain hole 3a, and the chamfers can reduce the fluid resistance of sludge filtered water in the outflow process, so that the drain through hole is not easy to block, and the drainage speed of the filtered water is accelerated. When the filter plate of this embodiment is adopted to carry out the filter pressing, because the filter plate is provided with water drainage tank on the surface, can communicate two liang of adjacent drainage through holes in order to form the drainage network, reduced the fluid resistance that meets among the drainage process, make the drainage channel unblocked, more do benefit to quick, even drainage, not hydrops to shorten the filter-pressing time greatly, improved filter-pressing efficiency, reduced the energy consumption.

Fig. 21 is a schematic view of a filter plate assembly of the present embodiment, which includes a filter plate 3, a guard plate 11, and a filter screen 4 and a filter cloth 5 laid on the surface of the filter plate 3. The filter screen 4 and the filter cloth 5 are arranged on the surface of one side of the filter plate 3 facing the sludge and are connected with the filter plate 3 through a pressure protection plate 11 and bolts. As shown in fig. 22 and 23, the pressure protection plate 11 is an annular plate, at least two fixing holes 11a for bolts to pass through are formed in the pressure protection plate 11, and the fixing holes 11a penetrate through the pressure protection plate 11. The fixing holes 1a are arranged at intervals on the pressure-protecting plate 11. One end face of the pressure guard plate 11 is in contact with the filter cloth, and the other end face is in contact with the sludge. The pressure guard plate 11 may be made of cast iron, stainless steel, aluminum alloy, alloy steel, plastic, composite polymer material, etc. In order to reduce the contact friction force between the connecting bolt and the sludge after filter pressing, a counter bore is preferably adopted as the fixing hole 11 a.

for convenience of description, the end face of the pressure guard plate 11 in contact with the filter cloth is defined as an upper end face, and the other end face, i.e., the end face of the pressure guard plate 11 in contact with the sludge, is defined as a lower end face, the pressure guard plate 11 has an outer side wall s1 (the side wall away from the pressure guard plate axis L) and an inner side wall s2 (the side wall close to the pressure guard plate axis L), taking the direction shown in fig. 23 as an example, the angle α between the outer side wall s1 and the upper end face s3 of the pressure guard plate 11 satisfies α ≦ 90 °, the angle α 8651 between the inner side wall s2 and the upper end face s3 of the pressure guard plate 11 satisfies α 3 ≦ 90 °, in order to facilitate the sludge to be separated from the filter cloth, α 0 ≦ 90 °, β ≦ 90 °, i.e., the outer side wall s1 and the inner side wall s2 obliquely intersect the (upper) end face of the pressure guard plate 11.

As shown in fig. 21, the pressure protection plate of this embodiment includes an inner ring pressure protection plate 11-1 and an outer ring pressure protection plate 11-2, the inner ring pressure protection plate 11-1 and the outer ring pressure protection plate 11-2 have the same structure, except that the diameter of the inner ring pressure protection plate 11-1 is smaller than that of the outer ring pressure protection plate 11-2, and the inner ring pressure protection plate 11-1 is located in the annular region of the outer ring pressure protection plate 11-2. The number of the pressure guard plates and the size of the pressure guard plates can be determined according to the size of the pressure filtering cavity. The filter screen 4 and the filter cloth 5 are sequentially paved on the surface of one side of the filter plate 3, holes for bolts to penetrate are processed on the filter screen 4 and the filter cloth 5, and blind holes for the bolts to penetrate are processed on the filter plate 3. The pressure protection plate 11 is placed on the filter cloth 5, the filter cloth 5 is compressed, the bolt sequentially penetrates through the pressure protection plate 11, the filter cloth 5 and the filter screen 4 and then penetrates into the filter plate 3, and after the bolt is tightened, the filter plate 3, the filter screen 4 and the filter cloth 5 can be fixed together through the pressure protection plate 11. This embodiment adopts the pressure backplate to come the auxiliary bolt to fix filter screen and filter cloth, and the bolt does not direct action on filter cloth and filter screen, can reduce the power that the bolt was used in on filter cloth and filter screen to avoid filter-pressing in-process bolt to damage filter cloth and filter screen, prolonged the life of filter cloth and filter screen, also be favorable to guaranteeing the filter-pressing effect.

In addition, the pressure guard plate may also be composed of a plurality of segments of arc plates 11 ', as shown in fig. 24, the arc plates 11' are circumferentially spaced or adjacently arranged to form a ring. When the arc plates 11 'are adjacently arranged, the arc plates 11' may be connected together by welding or other methods, or may not be connected together. When the pressure guard plate is composed of a plurality of small arc plates 11 ', one or more fixing holes are arranged on the arc plates 11'.

The pressure backplate of this embodiment can adopt monoblock panel to form integral type annular structure with the processing mode processing of getting rid of the material, also can process into the plate body of a plurality of segmental arcs with the fritter material, and the annular structure is formed in the concatenation of segmental arc plate body head and the tail, adopts split type structure, more is favorable to reducing the loss and the processing cost of processing material. The pressure guard plate can be in a circular ring shape, and can also be changed correspondingly according to the shape of the pressure filtering cavity, and other suitable shapes are adopted. In addition, the filter plate assembly of the previous embodiment includes a filter plate, a filter screen and a filter cloth, in other embodiments, the filter plate assembly may also include only a filter plate and a filter screen, or only a filter plate and a filter cloth, or the filter screen and the filter cloth are stacked in reverse order, and only the pressure guard plate is correspondingly disposed on the filter screen or the filter cloth, and the filter screen and/or the filter cloth is connected with the filter plate by the matching bolt

Of course, the technical concept of the present invention is not limited to the above embodiments, and many different specific schemes can be obtained according to the concept of the present invention, for example, the pressing plate can be a square shape or a circular shape; the drainage holes can be uniformly distributed on the pressing plate or non-uniformly distributed, the drainage holes can be in a circular shape, a square shape or a triangular shape, the shapes are not limited, only one type of drainage hole can be arranged on the pressing plate, the filter plate or the connecting plate, or the combination of the drainage holes in different shapes can be adopted, as long as the filtrate can be smoothly drained to a drainage system outside the equipment through the drainage holes; such modifications and equivalents are intended to be included within the scope of the present invention. In the description, each part is described in a progressive manner, each part is emphasized to be different from other parts, and the same or similar parts among the parts are referred to each other.

Claims

1. The filter press comprises a frame, a filter pressing cavity, a pressing plate and a filter plate, wherein the pressing plate and the filter plate are arranged in the filter pressing cavity; the method is characterized in that:

the pressing plate is provided with at least one pressing plate drain hole and at least one drain pipe; the press plate drain hole extends upwards from the bottom surface of the press plate; one drain pipe extends from the side wall of the pressing plate to the inside of the pressing plate and is communicated with one drain hole, and the number of the drain pipes is less than or equal to that of the drain holes;

and a sludge inlet is formed in the side wall of the filter-pressing cavity and communicated with the inside of the filter-pressing cavity.

2. The filter press of claim 1, wherein: the press plate drain hole penetrates through the press plate.

3. The filter press according to claim 1 or 2, wherein: the drain pipe is arranged in the middle or on the upper part of the pressing plate, and the drainage end of the drain pipe is flush with or extends out of the side wall of the pressing plate.

4. The filter press of claim 3, wherein: the drainage end of the drainage pipe is flush with the side wall of the pressing plate; and a side wall drain hole is formed in the side wall of the filter pressing cavity, and when the pressing plate moves downwards to extrude sludge in the filter pressing cavity, the drain pipe is communicated with the side wall drain hole.

5. The filter press according to claim 1 or 2, wherein: the press plate drain holes are uniformly distributed on the press plate in an array form, and at least the press plate drain holes positioned on the periphery are provided with drain pipes communicated with the press plate drain holes.

6. The filter press of claim 1, wherein: and the hole opening of the press plate drain hole is provided with a chamfer.

7. The filter press according to claim 1 or 2 or 4 or 6, wherein: and a water drainage groove is arranged on the end surface of the pressing plate, which is provided with a hole of the pressing plate drainage hole, and the water drainage groove is connected with the pressing plate drainage hole.

8. The filter press of claim 1, wherein: the mud inlets are uniformly arranged on the side wall of the filter-pressing cavity at intervals along the circumferential direction.

9. The filter press according to claim 1 or 8, wherein: the bottom of the side wall of the filter pressing cavity is provided with a sealing groove, and a sealing gasket is arranged in the sealing groove.

10. The filter press according to claim 1 or 8, wherein: the side wall of the pressure filtration cavity is provided with a connecting part which protrudes outwards from the side wall, the connecting part is provided with a fixing through hole, and the axis of the fixing through hole is parallel to the axis of the pressure filtration cavity;

and the pressure filtration cavity is connected with a connecting plate arranged on the top surface of the pressure plate through a connecting piece penetrating through the fixing through hole.

11. The filter press according to claim 1 or 2, wherein: the filter plate is provided with a plurality of filter plate drain holes penetrating through a filter plate body, at least one side surface of the filter plate is provided with a drain groove, each filter plate drain hole is communicated with the adjacent filter plate drain hole through at least one drain groove, and the drain grooves form a mutually connected net-shaped structure.

12. The filter press of claim 11, wherein: at least one end part of the filter plate drain hole is provided with a chamfer.

13. The filter press of claim 1, 2 or 12, wherein: the filter press comprises a plurality of filter pressing cavities which are stacked in sequence, a connecting plate is arranged between every two adjacent filter pressing cavities and connected with the top surface of the pressing plate, a plurality of connecting plate drain holes penetrating through the connecting plate are formed in the connecting plate, and fixing connecting holes for bolts to penetrate through are formed in the periphery of the connecting plate drain holes.

14. The filter press of claim 13, wherein: and the surface of at least one side of the connecting plate is provided with a water drainage groove, each connecting plate water drainage hole is communicated with the adjacent connecting plate water drainage hole through at least one water drainage groove, and the water drainage grooves form a mutually connected net-shaped structure.

15. The filter press of claim 13, wherein: at least one end part of the drain hole of the connecting plate is provided with a chamfer.

16. The filter press of claim 13, wherein: the connecting plate supports the filter pressing cavity above the connecting plate and is connected with the filter pressing cavity below the connecting plate through a bolt penetrating through the fixed connecting hole.

17. The filter press of claim 13, wherein: an elastic element is arranged between the connecting plate and the filter pressing cavity below the connecting plate.

18. the filter press according to claim 1, 2, 12, 14, 15, 16 or 17, wherein a filter screen and/or a filter cloth is arranged on the bottom surface of the filter plate, the filter screen and/or the filter cloth is connected with the filter plate through a pressure guard plate and a threaded connecting piece, the pressure guard plate is annular, a fixing through hole is arranged on the pressure guard plate, an included angle β between the outer side wall of the pressure guard plate and the upper end surface of the pressure guard plate is less than or equal to 90 degrees, and an included angle beta between the inner side wall of the pressure guard plate and the upper end surface of the pressure guard plate is less than or equal to 90 degrees.

19. the filter press according to claim 18, wherein the angle α between the outer side wall of the pressure guard plate and the upper end surface of the pressure guard plate is < 90 °, and/or the angle β between the inner side wall of the pressure guard plate and the upper end surface of the pressure guard plate is < 90 °.

20. The filter press of claim 18, wherein: the pressure guard plate is of an integrated annular structure; or the pressure guard plate is composed of a plurality of sections of arc-shaped plates which are arranged along the circumference, the arc-shaped plates are arranged at intervals or are arranged adjacently, and the adjacent arc-shaped plates can be connected together or not.

21. The filter press of claim 18, wherein: the pressure backplate includes the different pressure backplate of diameter, and the pressure backplate that the diameter is little sets up in the annular region of the pressure backplate that the diameter is big.