The commonly used equipment for sludge dewatering is a plate and frame filter press. How to choose polyacrylamide in the sludge dewatering of the plate and frame filter press. Cationic polyacrylamide is generally used for sludge dewatering of plate and frame filter press. The specific model can be tested and compared according to different sludge properties to determine the model of water treatment agent polyacrylamide. At the same time, the plate and frame filter press has a great relationship with the dosage of polyacrylamide, sludge conditioning and the dosage of chemicals. Insufficient dosage of chemicals can not effectively remove impurities in the sewage. Sludge treatment will cause mud runout and thin mud cake; excessive dosage will not only cause waste and increase costs, but also increase the nitrogen content in the sewage. The filterability of the mud treatment is reduced, and the better treatment effect is still not achieved. Therefore, a small test is needed to determine the dosage of the medicine. Polyacrylamide for plate and frame filter press, To achieve better results.
In the process of using the plate and frame filter press, the effect of the filter press is related to the selection of the filter cloth or the air permeability of the filter cloth. If it is a new filter cloth, the filter effect is no problem. If the filter cloth is contaminated, it needs to be cleaned in time, otherwise Will affect the dehydration effect. In addition, in the use of the sludge dewatering of the plate and frame filter press, in addition to paying attention to the nature of the sludge, the selection of polyacrylamide, the dosage and environmental conditions, etc. When polyacrylamide is added, the correct use method is also very important.
Polyscrylamide (polyscrylamide) for plate and frame filter press is abbreviated as PAM, commonly known as flocculant or coagulant, and its molecular formula is [CH―CH]n――CONH2 is a linear water-soluble polymer with a molecular weight of 4-20 million The appearance of the solid product is white or slightly yellow powder, and the liquid is a colorless viscous colloid, easily soluble in water, and easily decomposed when the temperature exceeds 120°C.
The special polyacrylamide for the plate and frame filter press has a positive group (-CONH2) in the molecule, which can adsorb and bridge the suspended particles dispersed in the solution, and has a strong flocculation effect. Therefore, it is widely used in water treatment and metallurgy, Papermaking, petroleum, chemical, textile, mineral processing and other fields.
The special polyacrylamide for plate and frame filter press is divided into: anionic, cationic and non-ionic.
Anionic type is mainly used for domestic production water, industrial and urban sewage treatment. It is also suitable for the flocculation and sedimentation of red mud and the separation of mud in the alumina preparation process. The anionic molecular weight is relatively high, mainly used for the precipitation of aqueous suspensions and suspensions. It is difficult to flocculate when acidic and slightly acidic solutions contain organic suspensions. In this case, cationic polyacrylamide can effectively perform flocculation and precipitation, showing its outstanding performance. The use form is 0.1-0.2% aqueous solution, prepared with water with PH≤7. It is easy to be hydrolyzed when mixed into a dilute solution, so it should be used with the preparation or used up the same day, and it is not easy to store for a long time.
When polyacrylamide is used in the plate and frame filter press, it does not scatter, the dosage is small, the dehydration efficiency is high, and the moisture content of the mud cake is below 80%. It is used as a flocculant in the water treatment of waterworks, with a small amount, good effect and low cost. It has better effect when it is combined with inorganic flocculant. In recent years, cationic polyacrylamide has become the mainstream treatment agent for water plants. What are the main uses of cationic polyacrylamide? High-efficiency cationic polyacrylamide pam flocculant thickener Cationic polyacrylamide can be used as a chemical auxiliary in the sugar industry in food processing. In addition, it can be used in the purification of washing water for various meats, fruits and vegetables, as well as the clarification of fruit wine and beer. In the sugar industry, syrup clarification must use pam flocculant with good performance. The type of flocculant and the method of preparation and use are very important. Macromolecular cationic polyacrylamide is more suitable for application in sugar factories. Using advanced cane juice clarification technology, high-efficiency cationic polyacrylamide pam flocculant in order to remove as much as possible, Polyacrylamide for plate and frame filter press.
1. Advantages: PAM is used for sewage treatment. It has high removal efficiency of organic matter in water, low dosage, fast settling speed and low water production cost. It is a product that other flocculants cannot replace.
2. How to use: PAM can be used alone or in conjunction with PAC for water treatment, but the two are stirred separately, and the user determines the amount of water and the amount of water added during dilution according to their respective conditions.
3. This product is lined with plastic bags, and the outer layer is packed in plastic composite film woven bags. Each bag has a net weight of 25 kg.