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Method for preparing filter cloth for solid-liquid separation of livestock and poultry manure and plate-and-frame filter press

A plate and frame filter press, solid-liquid separation technology, applied in separation methods, filtration separation, chemical instruments and methods, etc., can solve the problems of low unloading efficiency, easy adhesion of coarse oil, and filter cloth pores in plate and frame filter presses Easy to clog and other problems, achieve good anti-pollution ability, reduce solid content, and reduce treatment costs

Active Publication Date: 2021-05-04
青岛中恒能环境科学工程研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the existing technical problems that the surface of the filter cloth is easy to adhere to coarse oil, the pores of the filter cloth are easy to be blocked, and the unloading efficiency of the plate and frame filter press is low, and proposes a hydrophilic modified long fiber filter cloth

Method used

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  • Method for preparing filter cloth for solid-liquid separation of livestock and poultry manure and plate-and-frame filter press
  • Method for preparing filter cloth for solid-liquid separation of livestock and poultry manure and plate-and-frame filter press
  • Method for preparing filter cloth for solid-liquid separation of livestock and poultry manure and plate-and-frame filter press

Examples

Experimental program
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Embodiment 1

[0034] A method for preparing a filter cloth for solid-liquid separation of livestock and poultry manure, comprising the following steps,

[0035] 1. Preparation of polymethacrylic acid solution: Dissolve 10 grams of polymethacrylic acid in 200ml deionized water at 95°C; stir rapidly for 7-10 minutes with magnetic force, and let stand for 30 minutes; pour out the water, then add 300mL deionized water at 95°C After dissolving in water, slowly cool to room temperature with a water bath.

[0036] 2. Preparation of polyvinylamine hydrochloride:

[0037] 2.1. Put 50ml of sodium hypochlorite solution with a concentration of 1mol / L and 2g of sodium hydroxide solid into an aqueous solution, put it in a three-necked flask, and cool it to -5°C to -10°C with an ice-salt bath; add the above aqueous solution to 100g In an aqueous solution of polyacrylamide (PAM, relative molecular weight 9000-120000) with a mass fraction of 3.7%, react for 1 hour, then add 30 grams of sodium hydroxide in ...

Embodiment 2

[0049] Such as Figure 1-Figure 3 As shown, a plate and frame filter press for livestock and poultry manure with a blow-off and unloading mechanism includes a frame on which a filter chamber is installed, and multiple groups of filter frames 1 are installed in the filter chamber, and one side of the filter frame 1 is provided with According to the filter cloth prepared by the preparation method described in Example 1, the filter cloth is supported by a filter cloth shaft 3 . The upper and lower ends of the filter cloth are respectively equipped with an upper cloth shaft 31 and a lower cloth shaft 32 for supporting the filter cloth. The lower cloth shaft 32 is fixed on the bottom of the filter chamber, and the two ends of the upper cloth shaft 31 are provided with cloth shaft lugs 4, and the cloth shaft lugs 4 can make the filter cloth 2 tilt under the drive of the driving device. Specifically, the drive device includes a motor and a reducer, the output shaft of the reducer is...

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Abstract

The present invention proposes a preparation method of filter cloth for solid-liquid separation of livestock and poultry manure and a plate and frame filter press, which uses multi-dimensional porous acetic acid filter cloth as the base film, and polyurethane biuret as the crosslinking agent. The carboxylic acid group of polymethacrylic acid and the amine group of polyvinylamine are modified with highly hydrophilic functional groups. The multi-dimensional pore acetic acid filter cloth surface porous structure can increase the specific surface area of ​​the fiber and improve the effect of the modified cross-linking reaction. The obtained modified composite filter cloth has good anti-pollution ability and the service life of the filter cloth is prolonged. The plate and frame filter press changes the inclination angle of the filter cloth through the driving mechanism, and at the same time blows compressed air to the direction of the filter cloth through the blower. The compressed air can not only loosen the contact between the filter cake and the filter cloth, but also remove the filter residue in the gap of the filter cloth. One end of the filter cloth is fixed, and the other end moves back and forth to prevent the filter cloth from being wrinkled and affecting the normal press filtration.

Description

technical field [0001] The invention belongs to the field of livestock and poultry manure treatment, and in particular relates to a method for preparing a filter cloth for solid-liquid separation of livestock and poultry manure, and a plate and frame filter press equipped with modified filter cloth. Background technique [0002] The solid-liquid separation equipment for livestock and poultry manure mainly includes screw extruders or stacked screw filter presses. These two types of equipment have certain advantages in reducing investment and operating costs. The solid content of the filtrate is usually as high as 2%-3%, and the follow-up treatment is more difficult. With the increasing environmental protection requirements, the plate and frame filter press has obvious advantages in reducing the solid content of the filtrate and reducing the difficulty of subsequent filtrate treatment, and has gradually been valued. The plate and frame filter press has the advantages of large...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D39/08B01D25/21
Inventor 蒋小钰
Owner 青岛中恒能环境科学工程研究院有限公司