Dismountable cross-flow type filter for liquid with high viscosity

Abstract

The invention discloses a dismountable cross-flow type filter for liquid with high viscosity, comprising a filter housing which has a stock solution inlet and a filtered clear liquid outlet. A filter chamber is provided in the filter housing; the stock solution inlet is arranged on one end of the filter housing, and the filtered clear liquid outlet is arranged on the external surface of the filter housing; the stock solution inlet and the filtered clear liquid outlet both communicate with the filter chamber; orifice plates are provided in the filter chamber, dividing the filter chamber into a filtering processing zone and a raffinate storage zone; installing holes are provided in the two orifice plates to fix a filter tube system which is fixed between the two orifice plates; an inlet of the filter tube system is connected with the stock solution inlet and an outlet of the filter tube system is connected with the raffinate storage zone; the raffinate storage zone is provided with a residue discharge outlet; a compression gauge interface communicating with the raffinate storage zone is also provided in the filter housing. The invention enables the problem in filtering liquid with high viscosity to be effectively solved. A cross-flow structure enables the problem in discharging stock solution residues on-line to be effectively solved, and a dismountable structure enables the difficulty in cleaning to be effectively overcome.

Description

technical field [0001] The invention relates to the technical field of high-viscosity liquid filtration, in particular to a low-resistance stainless steel cross-flow filter suitable for filtering high-viscosity and high-cost liquids, such as spinning solution and colloid, and removing impurities. Background technique [0002] High-viscosity liquid refers to a fluid state whose viscosity is much higher than that of water. For example, the viscosity of a polymer solution of chemical fiber can reach tens to hundreds of poises. It tends to behave differently from low viscosity liquids during filtration due to the large increase in viscosity with increasing molecular weight. The apparent viscosity of high viscosity liquids generally decreases with increasing shear rate. The purpose of filtering high-viscosity liquids is mainly to remove granular impurities. Most of these impurities are colloidal particles and semi-colloidal particles in various forms, heterogeneous impurities an...

AI Technical Summary

Problems solved by technology

First, because of the high viscosity of the spinning solution, it is impossible to clean all the impurities embedded in the filter screen only by online flushing or recoil

Second, sometimes because of the need to replace the spinning solution, all the remaining spinning solution in the filter must be cleaned out before new production can be carried out. At this time, all filter elements must be disassembled and cleaned before re-use

Chinese patent ZL200720182533.1 introduces a sealing device for cross-flow filters, points out the difficulties and problems existing in the sealing of cross-flow filters in the current domestic market, and proposes to use double O-rings to seal cross-flow filters, explaining that For the cross-flow filter, it is not an easy task to be sealed and disassembled freely.

Of course, it is difficult to use double O-rings to seal high-pressure filters, because it is clear in the sealing industry that O-rings are not a high-pressure resistant sealing method.

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