Metal sintered mesh expansion reverse cleaning cylindrical filter element and cleaning method of the same

Abstract

The invention belongs to the technical field of filter elements, and discloses a metal sintered mesh expanded anti-cleaning cylindrical filter element and a method for installing a liner using the same. Its main technical features are as follows: it includes a cylindrical filter screen with a head at one end, a flange base is arranged at the other end of the filter screen, and a spiral along the axial direction of the filter screen is arranged inside the filter screen. A fin support ring is provided on the side of the support spring close to the flange base, fins are provided on the radial inner side of the fin support ring, and a circular truncated reflection cylinder is provided on the inner side of the support spring , a cone-shaped cone head is arranged above the reflection cylinder. Through one end of the flange base, a cleaning liquid or gas with a certain pressure is pulsed into the cylindrical filter screen; a part of the cleaning liquid or gas hits the fins, the filter screen produces wave-shaped movement in the axial direction, and the other part of the cleaning liquid or gas It quickly enters the cone head under the fins and the outer side of the reflecting cylinder through the gap between the fins. Under the action of the radial external force and the wave shaking of the filter screen, the filter cake attached to the outside of the filter screen falls off quickly.

Description

technical field [0001] The invention belongs to a metal sintered mesh expanded backwashing cylindrical filter element and a cleaning method for the filter element, in particular to a metal sintered mesh expanded backwashing cylindrical filter element and a cleaning method for the filter element. Background technique [0002] In the fields of pharmacy and beverage production, in order to filter large particles in dust or particles produced in the fruit pressing process, filter elements with filter screens are used. At present, the filter screens of filter elements mainly use filter cloth, because the filter cloth has a certain degree of softness. When impacted by the high-pressure liquid or gas of reverse cleaning, it can shake within a certain range, so that the filter cake and the filter screen can be separated quickly. However, the filter cloth has the following defects: first, its corrosion resistance is poor, and its service life is greatly reduced in acidic or alkaline ...

AI Technical Summary

Problems solved by technology

However, the filter cloth has the following defects: first, its corrosion resistance is poor, and its service life is greatly reduced in acidic or alkaline corrosive environments; There is no support frame on the outside of the net, so the filter cloth is easy to tear

[0003] In order to improve the corrosion resistance of the filter screen and prolong the service life of the filter element, people use metal sintered mesh as the filter screen of the filter element. When cleaning for a period of time, the following methods are mainly used: First, use self-cleaning, through the end of the flange base The cleaning liquid or gas with a certain pressure is pulsed into the cylindrical filter screen; because the metal sintered screen has a certain strength, the filter screen does not deform during washing, so the filter cake is not easy to fall off, and the cleaning liquid is easy to pass through The part of the filter screen without the filter cake flows out, causing the radial outward force of the filter cake to be reduced by liquid or gas, which further reduces the shedding of the filter cake, resulting in incomplete cleaning. If it exists in the filter cartridge, it is easy to deteriorate and affect the product quality; secondly, install a vibrating rod on the outside of the filter tank or the flange base of the filter element, and vibrate continuously during the flushing process. When vibrating, it is only the overall vibration, and the filter cake is not easy to fall off. Although it plays a certain role, the effect is not great, and it increases the noise and wastes energy; thirdly, it is cleaned by removing the filter element. Although this cleaning is relatively clean, it causes the material to be exposed to the air for a long time, which is easy to cause pollution of the material , especially in the field of food or pharmaceutical

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