Filtering and washing device

Abstract

The invention discloses a filtering and washing device which is composed of a hollow reactor, first filtering pipes, a stirring device, a material inlet, water inlets, a tail gas exhaust pipe, a filtering pipe opening, a material outlet, a liquid exhaust pipe and a liquid collecting pipe, wherein the first filtering pipes and the stirring device are arranged in the reactor; the material inlet, the water inlets, the tail gas exhaust pipe, the filtering pipe opening, the material outlet, the liquid exhaust pipe and the liquid collecting pipe are arranged outside the reactor; the filtering pipe opening is formed in the outer wall of the reactor; one ends of the first filtering pipes respectively extend into the reactor; the parts of the first filtering pipes, which extend into the reactor, are hollow pipes with through holes formed in the pipe walls; filtering cloth or filtering bags are tightly wrapped on the outer peripheries of the hollow pipes with the through holes formed in the pipe walls; the other ends of the first filtering pies are respectively fixed on the filtering pipe opening through flanges and are connected with the external liquid exhaust pipe. The filtering and washing device provided by the invention has a favorable filtering and washing effect, and is few in water washing quantity, and filtering cakes are loose, and pipeline delivery is convenient; enclosed operation is realized, and the production environment is improved; the impurity content is low; the product quality is good.

Description

(1) Technical field [0001] The invention relates to a filter washing device, in particular to a filter washing device for dyes and dye intermediates. (2) Background technology [0002] In the production of dye intermediates, filtration and washing processes are often encountered, and the filtration and washing processes in production are usually carried out by traditional suction filtration tanks, resulting in thick filter cake layers, large amounts of washing water, difficult washing uniformity, and product purity. Not high, when used for subsequent dye synthesis, it will cause diazo decomposition, low dye purity, low yield, and affect the quality of the dye. [0003] In addition, the filter cake is manually transferred, the labor intensity is high, and the suction filter tank cannot realize closed operation, the work site has a strong smell, and the work site operating environment is poor, such as the synthetic raw material chlorine of N-cyanoethyl-N-benzylaniline The res...

AI Technical Summary

Problems solved by technology

[0002] In the production of dye intermediates, filtration and washing processes are often encountered, and the filtration and washing processes in production are usually carried out by traditional suction filtration tanks, resulting in thick filter cake layers, large amounts of washing water, difficult washing uniformity, and product purity. Not high, when used for subsequent dye synthesis, it will cause diazo decomposition, low dye purity...

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