Filtering equipment for realizing separation of catalyst in production of polytetramethylene ether glycol

Abstract

The invention belongs to the technical field of chemical production equipment and relates to filtering equipment for realizing separation of a catalyst in production of polytetramethylene ether glycol. The filtering equipment comprises an upper barrel body and a lower barrel body which are in sealed connection, wherein a pipe plate is fixedly connected with an inner wall of the lower barrel body; the upper surface of the pipe plate is fixedly connected with a filter element; a first polytetrafluoroethylene gasket is arranged between the filter element and the pipe plate; a pressing plate is arranged at the upper part of the filter element; a plurality of screw rods which vertically and upward extend are fixed on the pipe plate; upper ends of the screw rods penetrate through corresponding through holes in the pressing plate, and springs sleeve the upper ends of the screw rods; the lower ends of the springs are tightly pressed on the upper surface of the pressing plate; and the upper ends of the springs jack against the bottom surfaces of nuts on the screw rods. When the filtering equipment works, the filtering equipment works stably, and the utilization efficiency of the filter element is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of chemical production equipment, and relates to a filtering equipment for realizing catalyst separation in the production of polytetramethylene enzymatic glycol. Background technique [0002] The filtration process of the filter is based on the different molecular diameters of the components in two or more mixed liquids to achieve the purpose of filtration. It is a commonly used unit operation for filtering liquid mixtures. It is widely used in chemical industry, biological fermentation and pharmaceuticals. It can not only extract and enrich products, but also filter out some other similar substances to obtain preliminary purification of products, such as beer production. Filtration of yeast and by-products, filtration of phenolic substances in sewage. At the same time, high-value substances are recovered as much as possible to effectively reduce production and operation costs, such as the filtration of he...

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Problems solved by technology

[0003] The existing PTMEG production catalyst separation equipment has the following defects: the material enters from the upper cylinder of the equipment, enters and exits from the outside of the filter element, and finally the clear liquid is extracted from the lower cylinder, and the heavy liquid is extracted from the upper cylinder. During operation, the catalyst It will deposit on the tube sheet and gradually solidify. The solidified catalyst tightly wraps the filter element and causes the performance part to fail; the connection between the filter element and the tube sheet is generally sealed with an O-ring. Under a certain pressure, the catalyst leaks from the seal and enters the clean room. liquid, leading to catalyst filtration failure; after the filter is fed, the high-temperature material causes the filter element to be heated and bent so that the filter membrane is destroyed, and the catalyst passes through the filter element and enters the clear liquid; the catalyst in the clear liquid enters the PTMG (polytetramethylene glycol) product to promote PTMG Thermal decomposition occurs; the filter element is gradually clogged during the filtration process, and the pressure difference rises, so it must be replaced, and the filter element replacement cycle is frequent

Existing filters not only waste a lot of expensive catalysts, but also increase the difficulty of catalyst treatment in subsequent sections. If you are not careful, catalysts may enter PTMEG and cause thermal decomposition of products, which has long restricted the stability and stability of PTMEG production equipment. Improvement of product quality

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