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Filter element for Textile printing and dyeing wastewater

JOHNSON SCREEN

Filter element for Textile printing and dyeing wastewater

Bluslot customized wedge wire filter screen specially used in Textile printing and dyeing wastewater.

Textile wastewater is mainly the wastewater containing natural impurities, fat, starch and other organic substances produced in the process of raw material cooking, rinsing, bleaching and sizing. Printing and dyeing wastewater is produced in multiple processes such as washing and dyeing, printing and sizing. It contains a large number of organic substances such as dyes, starch, cellulose, lignin and detergents, as well as inorganic substances such as alkali, sulfide and various salts.

Pulp dyeing wastewater has high chromaticity and COD, especially according to mercerized blue, mercerized black, ultra dark blue, ultra dark black and other printing and dyeing processes developed in foreign markets, this kind of printing and dyeing uses a large number of sulfide dyes and printing and dyeing auxiliaries, sodium sulfide, etc. Therefore, the wastewater contains a large amount of sulfide. This kind of wastewater must be pretreated with chemicals and then treated in series in order to stably meet the discharge standard.