Textiles or fabrics are flexible materials composed of a network of natural or artificial fibers (yarns or threads). During the dyeing and printing process, hazardous chemicals and dyes are used, and common circulating media are liquids (water, heat transfer oils, glycols) that do not contain particles or fibers, etc.
In order to ensure no color difference, the amount of pigment must be accurately measured and mixed, using QEEHUA’s metering pump, which can effectively control the amount of pigment.
The printing and dyeing wastewater mainly contains dyestuff, slurry, auxiliaries, oil agent, acid, alkali, fiber impurities and inorganic salts, etc. It is characterized by complex composition, high content of hard-to-degrade organic matter, high color, high alkalinity, large volume of water and poor biochemical properties. The wastewater is transported to the wastewater tank through centrifugal pump for multi-procedure treatment, and the chemicals are dosed to the sedimentation tank by metering pump to finally reach the discharge standard.
Printing and dyeing industry processes focus on.