Selection of Polyacrylamide for Plate and Frame Filter Press
Commonly used equipment for sludge dewatering include plate and frame filter press, belt filter press, spiral filter press, etc. Since there are many types of polyacrylamide flocculants, different equipment uses different sewage treatment chemicals. .
Selection of polyacrylamide for plate and frame filter presses. When plate and frame filter presses are used at sewage desliming sites, we select polyacrylamide through small and pilot tests. When conducting small tests on polyacrylamide, you should observe: floc strength, floc size, reaction speed, sewage clarity, etc. The polyacrylamide pilot plant should observe: pressure, filtration cycle, polymer dosage, sludge flow, mud cake texture, mud dryness, etc.
When selecting polyacrylamide, cationic polyacrylamide is generally used for sludge dehydration. The specific model can be based on different sludge properties. Experiments and comparative analysis can be carried out to determine the model of the water treatment agent polyacrylamide.
Most of the polyacrylamide used in plate and frame sludge dehydrators is cationic, and a few industries use anionic or nonionic polyacrylamide. When using polyacrylamide for plate and frame filter presses, attention should be paid to the molecular weight and ionicity not to be too high, and conventional indicators are sufficient. Furthermore, if it is a newly purchased machine, the filtration effect and air permeability of the filter cloth will be very good, and the mud pressing effect will be very good. If the machine has been used for a long time, the filter cloth may have poor air permeability or become contaminated. At this time, you need to pay attention to cleaning the filter cloth in time, otherwise it will affect the dehydration effect. In addition, when using a plate and frame mud press, in addition to paying attention to the properties of the sludge produced, the appropriate molecular weight and ionicity, dosage, and environmental conditions, it is also very important to dissolve the agent in the correct proportion and use it.