How to deal with the filter cloth for a long time?
3, acid washing: after washing, the filter cloth will be removed and drained. The filter cloth will be immersed in hot acid solution and soaked for 1 hours. After pickling, rinse with clean water until the water is neutral.4. Alkali washing: after washing, remove and drain filter cloth. Soak filter cloth in hot lye for 1 hours. After washing, rinse with clean water until the water is neutral.
5 cleaning process of filter cloth:A, two step cleaning procedures: hot water cleaning (80, 10 minutes), clean water.B, the three step cleaning procedure: rinse (5 minutes), 2 + 0.3% liquid immersion (75 + 5 C, 1 hours), Shimizu Shirai (pH water washing to neutral, pH test paper).C, the five step cleaning procedure: Shimizu Shirai (5 minutes), 1.5 + 0.3% hydrochloric acid (65 + 5 C, 1 hours), wash (5 minutes), 2 + 0.3% liquid immersion (75 + 5 C, 1 hours), clean water (water washing to neutral pH, pH test paper).6, filter cloth cleaning frequency: continuous production of each batch of two step cleaning cloth; the continuous use of one month and two months for cleaning cloth three steps; three months, four months and five months of continuous use of five steps of cleaning cloth.7, filter cleaning, the last wash must be washed to the water, pH near neutral.
Used filter cloth:1, the use of cloth after 5-6 months can apply for scrap processing; filter fourth five step cleaning filtering difficulties, can apply for scrap processing; cloth shrink is serious, installed in the frame began to leak, you can apply for scrap processing.2. The filter cloth that has not reached the scrap standard shall be used after cleaning.Filter cloth cleaning:1, lotion preparation: respectively, to 4 cleaning bucket water to volume of 3/4. Add the concentrated acid (or concentrated base) in the barrel and mix the cleaning solution to the concentration1.5%-2.0% or so. The temperature is up to 75 + 5, and the heating temperature of the acid is up to 65+ 5 degrees Celsius, hot water heating temperature above 80 degrees Celsius, reached the heating temperature, turn off the steam.2, washing: the filter cloth into the silk cleaning machine, clean with water.
