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Working principle of liquid filter bag is pressure filter, liquid filter bag quality is good, pay attention to see the efficiency of the filter cloth, pore size distribution, density, porosity, fracture strength, thickness, weight etc. A series of technical indicators, matters needing attention during installation of liquid filter bags:
First of all, we need to understand the filtration mechanism of the bag filter system: the liquid flows from the inside of the filter bag to the outside of the bag, and the filtered particles are trapped in the bag. The working principle of the bag filter is pressure filtration. The bag filter system mainly comprises three parts: a filter container, a support basket and a filter bag.
The factors affecting the dust removal effect of the bag filter are as follows:
(1) Selection of filter bag: The filter bag should be made of wear-resistant and high-temperature resistant materials, including fiberglass cloth/felt, NOMEX, needle felt, P84 needle felt, etc., taking into account the wear resistance of the filter bag, durability and high temperature. For factors such as cost, the copper industry generally uses NOMEX needle felt.
In order to ensure not only the dehydration effect of sludge, but also to control the ratio of sludge to dry sludge within a reasonable range, we should master the amount of sludge discharged from the concentration tank and a sedimentation tank and the time of sludge removal. The careful operation should make the amount of residual sludge as much as possible. Within half of the amount of initial sludge, To blend evenly.
The wear and tear of the edge of fabric:the worst wear section in the area of insterting which conbines the vacuum and not vacuum(it is in 10-15cm area distance with the edge of the fabric).
How to solve the problem:
1) Try to broaden the stagger width of vacuum chamber in turn.
2) Add the Atmospheric water lubrication in the edge of vacuum chamber.