The main points of washing vat after dyeing in high temperature and high pressure overflow jet dyeing machine

When changing to a lighter color after dyeing a dark color, the tank washing agent generally uses 4-6kg 98% caustic soda and 1-2kg detergent. Process conditions: liquid volume 2000L, temperature 130°C, time 60-90min. When washing the tank, open all the valves of each pipeline to make the tank washing liquid unblocked. After the heat preservation is completed, the high-temperature sewage will be discharged. When producing medium-length fiber fabrics, the filter screen is brushed once per shift; when producing polyester filament fabrics, the filter screen is brushed once a day; when producing polyester and other whitening varieties, light-colored cylinders are used and brushed. After dyeing the red product, the vat should be dyed with blue product first, and then the vat can be washed before dyeing the white variety. Otherwise, the whitened fabric produced is not only poor in whiteness, but also has red light, even if it is brushed two or three times before the whitened variety is produced, it will be invalid. For heavily polluted dye tanks, depending on the contamination, use a cleaning agent consisting of a highly permeable polymer detergent, hydrogen peroxide, ammonium bifluoride, oxalic acid and organic acid corrosion inhibitors.