Continuous self-cleaning reverse-pressure over-flow filtering device

Abstract

The present invention discloses a continuously self-cleaning anti-baric overflow filtrating device, including a closed crust, more than one filtrating unit which is placed inside the crust and continuously arranged, and a material inlet and a material outlet which are placed at two ends of the filtrating unit and communicate with each other. The position of the material inlet is higher than the material outlet. The material goes into the closed crust through the material inlet and flows towards the material outlet by gravity, and during the course of flowing, the material goes through different filtrating unit to finish the filtration. The present invention is applicable to a combustible, explosive and volatile-odor material separation; a liquid material back-washing and self-cleaning form is adopted, so residues can not form a cake layer on a filtrating plate and on the sieve, and a liquid flux can not be reduced after a long time working; inside same sizes, the present invention has a comparatively larger filtrating area; because of no action component, a dynamic consumption is small and the present invention can work for a long time without failure; a very high filtrating precision can be obtained by regulating the sieves with different specifications on the filtrating plate of the device of the present invention.

Description

technical field [0001] The invention relates to a solid-liquid separation device for special materials such as inflammable, explosive and volatile materials in the industries of medicine, chemical industry, food, etc., especially a solid-liquid extraction unit that separates and removes the Continuous self-cleaning back pressure overflow filter device for fine particles. Background technique [0002] Solid-liquid extraction is one of the most common unit operations in the pharmaceutical, chemical, food and other industries. For the separation and removal of fine solids in the extraction liquid, fluid filtration is generally involved. At present, filters are often used in the filtration process in the above fields. Most of the filters are traditional backwash filter cake filters. Materials pass through the filter screen vertically. As the filtration continues, filter cakes are gradually formed, thereby affecting Filtration efficiency. Plate and frame filters, vacuum filters...

AI Technical Summary

Problems solved by technology

For example, the plate-and-frame filter belongs to the pressurized filter device, which is the most widely used filter at present. It has a relatively large filter area per unit volume, but its disadvantage is that it cannot be continuously filtered, completely closed and the filter cycle cannot be achieved. Longer, not suitable for the separation of flammable, explosive or volatile materials, resulting in harsh working environment and excessive labor intensity during separation; drum vacuum filter is a vacuum filter device, although it can be operated continuously, but due to It is an open filter, so the disadvantage is that the filter area is small, the seal of the shaft end of the drum is prone to leakage due to long-term operation, and it is not suitable for the separation of materials with flammable, explosive and volatile odors; It can operate continuously through the strong centrifugal force, but the separation effect on tiny particles is poor, and the processing technology requirements are high, the equipment investment is large, and the power consumption in production is large, resulting in high production costs, and it cannot be adapted to flammable Separation of explosive and volatile odorous materials

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