Rinsing Unit
Industrial vessel designed for the repetitive removal of chemicals from an open-width fabric web. A continuous wash box facilitates the transition between chemical treatment stages by rinsing away residual alkalis, acids, salts or unfixed dyes. The unit relies on a constant flow of water and mechanical energy to achieve high efficiency.
Liquor Exchange
Efficiency depends on the rate at which fresh water replaces contaminated fluid near the fabric surface. Inside the continuous wash box, guide rollers submerge the fabric multiple times to maximize the contact time with the water. These rollers are often fluted to create turbulence that breaks the liquid boundary layer.
This action ensures that the fresh water can reach the interior of the yarn.
Water Conservation
Countercurrent flow systems ensure that the cleanest fabric meets the cleanest water at the exit of the range. As the fabric travels through the continuous wash box, it moves against the flow of the water in a countercurrent system. This setup keeps the cleanest water at the exit where the fabric is most rinsed.
Large volumes of water are saved by reusing the overflow from the final tanks in the earlier stages of the wash. Heat exchangers are frequently added to recover thermal energy from the hot wastewater before it reaches the drain.
Fabric Tension
Vertical configurations allow for a large amount of fabric to be stored within a small footprint. Because the continuous wash box contains many rollers, the tension must be carefully balanced to prevent stretching or creasing. Driven rollers are synchronized with the main range speed to ensure the web moves without excessive drag.
