Method for treating flue gas of dyeing and finishing setter

Abstract

The invention discloses a method for treating flue gas of a dyeing and finishing setter. The rear end of the setter is provided with a heat exchanger, a washing unit, an oil-water separator and an electrostatic dedusting unit. In the method, (1) the counterflow heat exchange is carried out between the flue gas of the setter and the air by the heat exchanger, the waste heat is recovered, and the energy is saved; (2) the flue gas treated by the heat exchanger enters from the bottom of the washing unit and is sprayed and washed by the spraying liquid in the washing unit, and the flue gas is in counterflow contact with the spraying liquid, so as to remove most soot grains with the grain diameter being more than 1mum; and (3) the flue gas treated by the washing unit is dedusted by the wet-type electrostatic dedusting unit, most soot grains with grain diameter being less than 1mum are attached by electrons with high density, the charged grains move to the wall of a condensation pipe directionally and are collected and captured by the wall of the pipe, and the liquid film on the inner wall of the condensation pipe is updated continuously, thereby achieving the self-cleaning function of the inner wall of the condensation pipe.

Description

technical field [0001] The invention relates to a treatment method for industrial high-temperature oily and wet fume, in particular to a treatment method for fume from a dyeing and finishing machine. Background technique [0002] Chemical fiber textiles often need to add a variety of oily textile chemical auxiliaries in the upstream weaving and dyeing processes. In the finishing and setting process of printing and dyeing factories, a large amount of high-temperature oily and humid fumes will be generated when heated and dried by the setting machine. [0003] Usually, the temperature of the flue gas of the setting machine is generally in the range of 160-190°C, and the exhaust volume is 50-210Nm for each setting machine 3 / min; The pollutants in the flue gas mainly include weaving oil, spinning oil, organic solvents for refining and cleaning, dyes and dyeing auxiliaries. The particle concentration is 70-230mg / m 3 , in which the concentration of viscous particles is 25-120mg...

AI Technical Summary

Problems solved by technology

[0004] The flue gas of the setting machine is white or light blue smoke, mixed with stench and pungent smell, which seriously pollutes the factory area and the surrounding atmospheric environment. Billowing white smoke not only seriously affects the normal life and health of enterprise employees and surrounding residents, Especially in low pressure weather conditions, it will also affect the traffic safety of the roads around the enterprise

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