The vacuum degree is relatively low, which can be compared with the normal vacuum degree. Generally, the vacuum degree is above 40kPa. If it is indeed low, check the reason for the low vacuum degree. Poor regeneration of filter cloth: The filter cloth cannot be washed thoroughly. Check the flow rate, pressure, and nozzle of the flushing water to ensure the flushing water volume. The effect of removing the remaining filter cake with a knife is not good: adjust the scraper or replace the scraper, and the scraper should be tightly attached to the filter cloth.
Filter cloth aging: The filter cloth is clogged due to prolonged operation. Replace the filter cloth (designed to be replaced approximately every 6 months).
Belt deviation: Belt deviation can cause the water outlet hole at the center of the belt to deviate from the center of the vacuum chamber, and the belt hole will be covered by the friction belt. At this time, the vacuum degree will increase and the dehydration rate will deteriorate
Adjust the tension roller and adjust the screw rod to align the belt. Unqualified slurry: The slurry density is below 40%, and the moisture content of the slurry is high, with a normal value of 40% to 50%. At this time, adjust and inspect the first stage dewatering cyclone to achieve the required concentration.
Due to issues with desulfurization processes and other factors, the quality of the slurry is poor. During the dehydration process, there is always a thin layer of mud on the surface of the filter cake, and the vacuum degree may be too high. At this time, the slurry is sampled, tested for its composition, and adjusted to meet the requirements.
Blockage of demister: Open the upper inspection port of the gas-liquid separator and rinse the demister with water. Uneven feeding of the feeder,
Causing uneven thickness of filter cake: Check if the porous plate inside the feeder is deformed and replace the porous plate. The thickness of the filter cake is too thick, greater than 30mm, and the gypsum processing capacity is greater than the design value. Adjust the amount of slurry