I. Cleaning Methods for Different Types of Stains
1. Removal of Oligomers: Using NaOH or acidic sulfite detergents can effectively dissolve oligomers precipitated from polyester fibers at high temperatures. Adding a high-temperature resistant dispersant can inhibit reprecipitation. Combined with rapid cooling and high-temperature drainage, it prevents condensation and deposition during cooling.
2. Removal of Alkali Scale, Calcium Salts, and Fiber Flakes: Although hydrochloric acid or sulfuric acid cleaning is effective, it is highly corrosive to stainless steel inner walls and chromium plating, easily causing equipment damage. TF-105F tank cleaner is recommended; it does not contain strong acids, is non-corrosive to the tank body, and provides a safer and more reliable cleaning effect.
3. Removal of Agglomerated Dyes, Tar, and Grease: Using a combination of sodium hydrosulfite, liquid alkali, and emulsifier for reduction cleaning can effectively decompose stubborn dyes and grease. During cleaning, an appropriate amount of waste cloth should be placed in the tank. High-speed water flow from the nozzles should carry the waste cloth to flush "dead corner" areas, improving cleaning coverage.
II. Key Points for Cleaning Operations
1. Regular Cleaning: It is recommended to perform a thorough cleaning of the dye bath after every 10–15 batches of dyeing.
2. Avoid Empty Bath Operation: During the cleaning process, the dye solution must be kept circulating to prevent the heating tubes from drying out or overheating in certain areas.
3. Safety Precautions: Wear protective gloves and goggles during operation to avoid contact between chemicals and skin or eyes.
