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A filter cake filtering method of a filter press and an easy-to-clean filter press

A filter cake filtration and filter press technology, which is applied in the field of filter presses, can solve problems such as filter hole clogging, difficulty in separating solid-liquid mixture, and affecting filtration efficiency, and achieves the effects of easy cleaning, avoiding difficult cleaning, and improving filtration efficiency

Inactive Publication Date: 2016-02-10
湖北纽太力环境科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The solid-liquid mixture material enters each filter chamber from the feeding hole on the thrust plate of the frame, the solid particles with a particle size larger than the filter hole diameter are trapped in the filter chamber by the filter cloth, and the solid particles and liquid with a particle size smaller than the filter hole diameter pass through the filter chamber. Some solid particles whose particle size is not much different from the pore size of the filter cloth will drill into the filter holes and stay in the filter cloth holes under the action of pressure, causing the filter holes to be blocked and affecting the filtration efficiency, especially for oily dirt. The separation of solid-liquid mixtures is particularly difficult

Method used

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  • A filter cake filtering method of a filter press and an easy-to-clean filter press

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Experimental program
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Effect test

Embodiment 1

[0020] A filter cake filtering method of a filter press of the present invention comprises the following steps:

[0021] Ⅰ. Mix attapulgite and water to form a uniform slurry, wherein the ratio of attapulgite to water is 1:9;

[0022] Ⅱ. Use a pump to press the prepared attapulgite mud into the filter press to filter to form a filter cake. The filter cloth precision is 150μm, and the pump pressure is 0.3mpa. When the thickness of the filter cake reaches 5mm, stop pressing the mud into the press. filter filter;

[0023] Ⅲ. Pressurize the filtrate to be filtered, the pressure is 0.3mpa, make the filtrate pass through the filter cake layer, and then filter through the filter cloth;

[0024] Ⅳ. After filtering for a period of time, more and more solid substances remain on the filter cake, which will block the filter channel. At this time, stop filtering and clean the filter press. Open the filter press,

[0025] Clean up the solid matter retained on the filter cake, add some at...

Embodiment 2

[0029] A filter cake filtering method of a filter press of the present invention comprises the following steps:

[0030] Ⅰ. Mix attapulgite and water to form a uniform slurry, wherein the ratio of attapulgite to water is 1:4;

[0031] Ⅱ. Use a pump to press the prepared attapulgite mud into the filter press to filter to form a filter cake. The filter cloth precision is 200μm, and the pressure of the pump is 0.35mpa. When the thickness of the filter cake reaches 20mm, stop pressing the mud into the press filter filter;

[0032] Ⅲ. Pressurize the filtrate to be filtered, the pressure is 0.35mpa, make the filtrate pass through the filter cake layer, and then filter through the filter cloth;

[0033] Ⅳ. After filtering for a period of time, more and more solid substances remain on the filter cake, which will block the filter channel. At this time, stop filtering and clean the filter press. Open the filter press,

[0034] Clean up the solid matter retained on the filter cake, ad...

Embodiment 3

[0038] A filter cake filtering method of a filter press of the present invention comprises the following steps:

[0039] Ⅰ. Mix attapulgite and water to form a uniform slurry, wherein the ratio of attapulgite to water is 1:5;

[0040] Ⅱ. Use a pump to press the prepared attapulgite mud into the filter press to filter to form a filter cake. The filter cloth precision is 250μm, and the pressure of the pump is 0.4mpa. When the thickness of the filter cake reaches 13mm, stop pressing the mud into the press filter filter;

[0041] Ⅲ. Pressurize the filtrate to be filtered, the pressure is 0.35mpa, make the filtrate pass through the filter cake layer, and then filter through the filter cloth;

[0042] Ⅳ. After filtering for a period of time, more and more solid substances remain on the filter cake, which will block the filter channel. At this time, stop filtering and clean the filter press. Open the filter press,

[0043] Clean up the solid matter retained on the filter cake, add...

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Abstract

The invention discloses a filter cake filtering method for a filter press. The filter cake filtering method for the filter press comprises the following steps: a, arranging a filter cake layer on filter cloth of the filter press; and b, pressurizing filtrate, so as to enable the filtrate to be filtered through the filter cake layer and the filter cloth in sequence. Furthermore, the filter cake filtering method for the filter press comprises the following steps before the step a: c, mixing attapulgite with water to obtain slurry; and d, pressing the slurry into the filter press through a pressure to be filtered, so as to form the filter cake. Furthermore, according to the filtering method, the invention provides the filter press easy to clean. The filter press comprises a filter frame 2, a filter board 5 and the filter cloth 4, wherein the filter board is arranged inside the filter frame; the filter cloth is arranged on the filter board; the filter cake layer is arranged on the filter cloth. According to the filter cake filtering method and the filter press provided by the invention, the filter cake is arranged on the filter cloth for primary filtering, so that the filter press is changed into a filtering device with a secondary filtering function. Therefore, the filter cake generated after the filtering is effectively used; the filtering efficiency is improved; the filtering pressure is reduced; energy is saved; the cost is low.

Description

technical field [0001] The invention relates to a filter press technology, in particular to a filter cake filtering method of a filter press and an easy-to-clean filter press. Background technique [0002] Press filtration is a commonly used method for separating solid-liquid mixtures, including a frame, a pressing mechanism, and a filtering mechanism. The filtering mechanism includes a filter plate, a filter frame, and a filter cloth, and the filter cloth has filter holes. The solid-liquid mixture material enters each filter chamber from the feeding hole on the thrust plate of the frame, the solid particles with a particle size larger than the filter hole diameter are trapped in the filter chamber by the filter cloth, and the solid particles and liquid with a particle size smaller than the filter hole diameter pass through the filter chamber. Some solid particles whose particle size is not much different from the pore size of the filter cloth will drill into the filter hole...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D25/12
Inventor 段鑫磊段晓明徐欣耘
Owner 湖北纽太力环境科技股份有限公司