Multi-section extrusion assembly for filter pressing

Abstract

The multi-section extrusion assembly for filter pressing comprises a plurality of filter plates, and the plurality of filter plates are arranged at intervals; diaphragms are oppositely arranged between the filter plates, the diaphragms are communicated with the high-pressure medium conveying pipe cavity, and elastic sealing pieces are arranged between the filter plates. The problem that the service life of a diaphragm of a filter press in the prior art is generally short is solved, and a new filter pressing stroke is provided for compression between the filter plates through the elastic sealing gaskets; under the condition, the expansion volume of the diaphragm is smaller, correspondingly, the service life of the diaphragm is longer, and the operation of the filter press is safer.

Description

Technical Field

[0001] The present invention relates to the field of filter presses, and in particular to a multi-stage extrusion assembly for pressure filtration. Background Art

[0002] At present, ultra-high pressure filter presses on the market are commonly used in the solid-liquid separation process of coal slime in coal mines, municipal sewage, etc. However, the diaphragm filter presses in the prior art generally have problems such as low pressure resistance, relatively high moisture content in the coal cake after pressure filtration, and the need for drying or heating to remove moisture, resulting in low pressure filtration efficiency.

[0003] Based on the above, in order to obtain a coal cake with a lower moisture content, the diaphragm needs to expand as much as possible, resulting in an extremely high internal pressure in the diaphragm. In this case, the diaphragm is often damaged due to excessive pressure, resulting in low economic benefits and potential safety hazards of diaphragm bursting during operation. In particular, due to the inconvenience of diaphragm replacement, it also leads to high maintenance pressure and high labor intensity of operators, affecting production efficiency. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a multi-stage extrusion assembly for pressure filtration based on multi-stage extrusion, with a small deformation of the diaphragm, a small internal pressure, not easily damaged, and safer to use.

[0005] The device includes filter plates, and a plurality of the filter plates are arranged at intervals; Diaphragms are oppositely arranged between the filter plates, and the diaphragms are communicated with the high-pressure medium delivery pipe chamber; the so-called opposite arrangement means that diaphragms are respectively arranged on the opposite surfaces of the filter plates; Elastic seals are arranged between the filter plates.

[0006] The achieved effect is that when the oil cylinder of the filter press acts, the filter chamber feeds to perform primary pressure filtration; The diaphragm bulges to perform secondary pressure filtration; The oil cylinder of the filter press acts for the second time, and based on the compression deformation of the elastic seals arranged between the filter plates, tertiary pressure filtration is performed.

[0007] That is to say, based on the arrangement of the elastic seals, the expansion volume of the diaphragm in the extrusion assembly can be smaller, that is, through the elastic compression of the elastic seals, a new stroke is provided for the approach between the filter plates, thereby achieving the effects of longer service life of the diaphragm and safer operation.

[0008] The beneficial effect of the present invention is that the present invention solves the problem of low service life of the diaphragm commonly existing in the prior art filter presses by providing a new pressure filtration stroke for the compression between the filter plates through the elastic sealing pads; in this case, the expansion volume of the diaphragm is smaller, correspondingly, the service life of the diaphragm is longer, and the operation of the filter press is also safer. Description of the Drawings

[0009] Figure 1 is a schematic structural view of a multi-stage extrusion assembly for pressure filtration according to the present invention; Figure 2 is based on Figure 1 direction, a schematic structural view in the side view direction; Reference Signs: 1 - filter plate, 2 - diaphragm, 3 - elastic seal, 4 - central flange, 5 - filter plate boss, 6 - groove The realization, functional features and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed Embodiments

[0010] Referring to Figure 1 、 Figure 2 , a multi-stage extrusion assembly for pressure filtration according to the present invention includes a filter plate 1, and a plurality of filter plates 1 are arranged at intervals; Diaphragms 2 are oppositely arranged between the filter plates 1, and the diaphragms 2 are communicated with the high-pressure medium delivery pipe chamber; the so-called opposite arrangement means that diaphragms 2 are respectively arranged on the opposite surfaces of the filter plates; Elastic seals 3 are arranged between the filter plates.

[0011] Further, grooves 6 are oppositely arranged on the filter plate 1, and the elastic seals 3 are arranged in the grooves 6.

[0012] The so-called opposite arrangement means that the inner surfaces of the head and tail filter plates and the two surfaces of the middle filter plate 1, that is, on the opposite surfaces of the plurality of filter plates, correspondingly arranged grooves 6 are respectively provided.

[0013] Further, the elastic seals 3 are encapsulated in the grooves 6 by bolts.

[0014] The achieved effect is that the elastic seals 3 are firmly assembled.

[0015] Further, the grooves 6 are continuous grooves 6 arranged at a position near the edge of the filter plate 1.

[0016] That is to say, the grooves 6 are continuous groove bodies that are nearly annular or nearly rectangular based on the shape of the filter plate 1, and their installation positions are close to the edge of the filter plate 1, and a filter chamber with a larger volume is obtained thereby.

[0017] Further, filter cloth is also arranged on the inner surface of the diaphragm 2.

[0018] The achieved effect is that the filter cloth cooperates with the diversion groove to ensure that the pressure-filtered liquid is discharged from the filter chamber.

[0019] Furthermore, a central flange is centrally provided on the filter plate 1, and is evenly arranged in an annular shape around the central flange 4. Filter plate bosses 5 are oppositely arranged on the filter plate.

[0020] The effect achieved thereby is to ensure the stable operation of the filter chamber and also provide a limit stroke for the operation of the filter plate 1.

[0021] During use, the oil cylinder of the filter press acts, and the extrusion assembly acts from the head to the tail direction of the machine. The central flange 4 feeds materials, and the materials enter the filter chamber between the filter plates for primary filtration. The diaphragm 2 is pumped with high-pressure medium through the high-pressure medium delivery pipe, and the diaphragm 2 bulges for secondary filtration. The oil cylinder of the filter press acts, and the extrusion assembly acts a second time from the head to the tail direction of the machine. That is, based on the elastic seal 3 configured between the filter plates, the elastic seal 3 is deformed under pressure, providing a new stroke for the second action of the filter plate 1 for tertiary filtration.

[0022] That is to say, due to the setting of the elastic seal 3, the expanded volume of the diaphragm 2 in the extrusion assembly can be smaller. That is, through the elastic compression of the elastic seal 3, it provides a new stroke for the approach between the filter plates 1, that is, for re-filtration, thereby achieving the effects of longer service life of the diaphragm 2 and more secure implementation.

[0023] The above shows and describes the basic principles, main features and advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be construed as limiting the claims.

[0024] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A multi-stage extrusion assembly for pressure filtration, comprising filter plates, wherein a plurality of the filter plates are arranged at intervals; diaphragms are oppositely arranged between the filter plates, and the diaphragms are communicated with the high-pressure medium delivery pipe chamber, and it is characterized in that: An elastic seal is provided between the filter plates.

2. The multi-stage extrusion assembly for pressure filtration according to claim 1, characterized in that, Relatively arranged grooves are provided on the filter plates, and the elastic seal is arranged in the grooves.

3. The multi-stage extrusion assembly for pressure filtration according to claim 1, characterized in that, The elastic seal is encapsulated in the groove by bolts.

4. The multi-stage extrusion assembly for pressure filtration according to claim 2, characterized in that, The groove is a continuous groove provided at a position near the edge of the filter plate.

5. The multi-stage extrusion assembly for pressure filtration according to claim 1, characterized in that, A filter cloth is also provided on the inner surface of the diaphragm.

6. The multi-stage extrusion assembly for pressure filtration according to claim 1, wherein, A central flange is provided in the center of the filter plate, and is evenly arrayed around the central flange. Filter plate bosses are relatively arranged on the filter plate.

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