Plastic particle filter

Abstract

The invention relates to a plastic particle filter, which is equipment special for filtering plastic particles with different particle size ranges. The plastic particle filter comprises a filter cartridge of which the lower part is a conical cavity, a filter element and a programmable logic controller (PLC), wherein the top of the filter cartridge is provided with an upper cover; the filter element is arranged in the filter cartridge; a liquid inlet is formed below the side of the filter cartridge, and a liquid outlet is formed above the side of the filter cartridge; a bleed hole is formed in the bottom of the filter cartridge and is controlled by a slag discharge valve; the filter element has a wedge filtering net structure; a scraping disc is fixed above the filter element of the wedge filtering net, is linked with a cylinder which is fixed on the upper cover and is pressed down along an inner wall of the filter cartridge; and a drainage pipe is fixed on the upper cover and extends to the lower part of the filter cartridge by virtue of the scraping disc. The plastic particle filter has the advantages that the discharged solid plastic particles only contain micro-liquid and can be immediately recovered, and liquid in the impurities is not required to be removed. The equipment is wholly controlled by the PLC, manpower is not required in the whole filtering process, and the filter can continuously work without halt.

Description

technical field [0001] The invention relates to a plastic particle filter, which is a professional device for filtering plastic particles in different particle diameter ranges. Background technique [0002] Such as ABB-PLC intelligent control, fully automatic without manual operation, mainly composed of filter cartridge, stainless steel wedge filter, PLC controller and other parts. Use a metal scraper to remove impurities from the screen wall. Manual operation or automatic control can be freely selected. Used for: removing particles and impurities in various high-viscosity liquid crystals, suitable for fine chemicals, oil products, food and medicine, water treatment and other occasions. [0003] Existing plastic particle filters include traditional filter cake filters, or depth filters, such as bag or filter elements, which have the following problems: [0004] 1. Self-cleaning is difficult. Due to the high compressibility of plastic particles, it is difficult for plastic...

AI Technical Summary

Problems solved by technology

[0004] 1. Self-cleaning is difficult. Due to the high compressibility of plastic particles, it is difficult for plastic particles to form a filter cake on the surface of the filter element during the process of filtering plastic particles. Traditional filter cake filters cannot automatically remove plastic particles. , and the depth filter cannot realize self-cleaning;

[0005] 2. The discharge of dry slag cannot be realized. Some companies use scraping filters when processing plastic particles, but since most of the plastic particles have a smaller specific gravity than the liquid, the plastic particles are scraped off by the scraper during the backwashing process of the filter. During the process, plastic particles cannot settle down into the slag discharge tank due to their own specific gravity, but float upward on the liquid, resulting in only a small amount of impurities being discharged during slag discharge, and the discharged impurities contain a large amount of liquid, which requires further processing. Filtration to achieve dry residue

Since most of the impurities remain inside the filter element, the filter will be easily blocked, which will affect the effect of continuous operation;

[0006] 3. Cannot work continuously

Using traditional bag-type, core-type and other deep-layer filters, although the effect of dry slag can be achieved, the filter needs to be shut down every time during the slag discharge process, and the filter bag and filter element must be pulled out for cleaning, which cannot achieve continuous work. And need to replace the filter bag and filter element regularly

cause cost increase

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