Filter for filtering synthetic produced liquid in production process of dimethylformamide and filtering method thereof

Abstract

The invention relates to a filter for filtering synthetic produced liquid in the production process of dimethylformamide, comprising a filter cylinder body (1), a filter head cover (13), a synthetic produced liquid input pipe (2) and a synthetic produced liquid output pipe (3), wherein the bottom of the filter cylinder body (1) is provided with a settling chamber (4); the settling chamber (4) is connected with the synthetic produced liquid input pipe (2); the bottom end of the settling chamber (4) is provided with a sediment discharge valve (5); the filter cylinder body (1) is internally provided with more than one vertically placed filtering pipe (6); the lower end of the filtering pipe (6) is a filter pipe outlet end (8); the filter pipe outlet end (8) is connected with a collector (9);and the synthetic produced liquid output pipe (3) is connected with the collector (9). The invention can not generate lateral leakage and enhances the filtering effect because the bottom of the filter cylinder body (1) is provided with the settling chamber (4); and in addition, the invention increases the pressure of the inlet end of the filtering pipe (6) during filtration, thereby enhancing thework efficiency of the filter.

Description

technical field [0001] The invention relates to a filter, in particular to a filter for filtering synthetic production fluid in the production process of dimethylformamide. Background technique [0002] In the production of dimethylformamide, catalyst residues and excess catalysts will be mixed in the synthetic production fluid. During distillation, these solid particles must be filtered out to prevent them from entering the rectification tower and causing blockage. At the same time, excessive accumulation of catalysts will also cause DMF decomposition. [0003] At present, the filter adopts a plurality of stainless steel wire meshes of different sizes to form a plate filter to filter in a pressure-resistant cylinder. Due to the large capacity of the plate filter, the filter cylinder is made of carbon steel. Disadvantages of this equipment: Since the filter screen is only 280 mesh, the filtering effect needs to be improved. At the same time, the pressure resistance of the p...

AI Technical Summary

Problems solved by technology

Disadvantages of this equipment: Since the filter screen is only 280 mesh, the filtering effect needs to be improved. At the same time, the pressure resistance of the plate filter is poor, and the screen will be deformed when the pressure is greater than 0.5MPa, resulting in deformation of the mesh and the connection of the filter screen outlet. Deterioration, side leakage occurs

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