Metal film filter used in dye intermediate production

Abstract

The invention relates to a metal film filter used in dye intermediate production. The metal film filter comprises a tank body and a sealing cover, wherein the sealing cover is positioned at the bottom of the tank body; the sealing cover is connected with the tank body by the connection piece and an air cylinder; a feeding opening is formed in the upper part of the tank; a safety valve is arranged at the top of the tank body; a discharging opening, a back-blowing inlet and a cleaning opening are also formed in the tank body; a drain outlet is formed in the bottom of the tank body. In the metal film filter, a back-cleaning device is arranged, the back-blowing inlet is used for blowing the filter, the cleaning opening is used for cleaning a film and can be reused, the service life of the filter is prolonged, and the production cost is reduced; a metal film is made from 304 stainless steel, is high in heat resistance, and cannot deform when being heated; a bottom sealing ring is made from heat-resisting rubber, inflatable ladder-shaped design is adopted for a sealing manner, a sealing effect is improved after air inflation, and clean production is realized; the sealing cover is opened and closed by the air cylinder, so that the degree of automation of the filter is improved; the device capacity is large, the cleaning times are reduced, and the cleaning production in a workshop is facilitated.

Description

technical field [0001] The invention belongs to the field of filtering equipment, in particular to a metal membrane filter used in the production of dye intermediates. Background technique [0002] At present, the filters used in China have high precision, but there are obvious shortcomings in the application of the dye intermediate industry. The shortcomings of the filters used in the past are described below. [0003] 1. The filter cloth bag filter has the following disadvantages in the process of only using it: first, the cycle of reuse of the filter bag is short, resulting in waste of resources; second, the filtrate has a certain corrosion on its equipment material (stainless steel), although it is very slow, it will take a long time After time use, leaks will appear at the welds inside the equipment, resulting in the presence of activated carbon in the filtrate. The third is that the equipment uses quick-opening screws to fasten the equipment, and there are many screws...

AI Technical Summary

Problems solved by technology

[0003] 1. The filter cloth bag filter has the following disadvantages in the process of only using it: first, the cycle of reuse of the filter bag is short, resulting in waste of resources; second, the filtrate has a certain corrosion on its equipment material (stainless steel), although it is very slow, it will take a long time After a period of use, there will be leaks at the welds inside the equipment, resulting in the presence of activated carbon in the filtrate

The third is that the equipment uses quick-opening screws to fasten the equipment, and there are many screws. Two workers install the filter cloth, and it takes 0.5 hours to fasten the screws, and the labor intensity of the workers is high.

[0004] 2. The filtration of the origami filter element has the following disadvantages during use: First, the heat resistance is not good, and long-term high-temperature filtration will deform it, thereby affecting the filtration accuracy; Rubber is not conducive to dismantling the filter element, and it will be worn after repeated disassembly, which will affect its filtration accuracy

[0005] 3. The titanium metal filter has the following disadvantages during use: first, its seals are easy to age, have poor heat resistance, and there will be material leakage after long-term use; The titanium rod breaks during disassembly and cleaning, and needs to be returned to the factory for welding, resulting in increased costs

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