Polyacrylamide action principle a) flocculation principle: PAM used for flocculation, the flocs are species with surface properties, especially PH value of zeta potential, viscosity, turbidity, and on the suspension, the surface zeta potential of the particles, the particles The reason inhibitor added surface charge opposite PAM, can reduce the zeta potential and cohesion. 2) bridging adsorption: PAM molecular chain is fixed on the surface of different particles, forming bridges between the polymer particles, the particles form aggregates and settling. 3) Surface: various polar groups adsorbed particles PAM molecule. 4) enhancement: PAM molecular chains and dispersed through a variety of mechanical, physical, chemical and other effects, the dispersed phase implicated together to form a mesh. Polyacrylamide PAM Technical Process Edit this paragraph is precipitated in a chemical reaction where the reaction solution was not soluble substance. From the word meaning is understood under gravity sedimentation removed. The suspended material in water, which may be a physical process, simple, good results is an important technology for sewage treatment. Depending on the nature of suspended substances, flocculation polyacrylamide gel concentration and performance, precipitation can be divided into: natural sedimentation, flocculation, sedimentation area. Higher sedimentation of suspended particles concentration weeping domain (5000mg / L or more), sedimentation of particles being around other particles affect the relative position between the particles remains unchanged, together form a whole sink, there is a clear interface between mud and water clarification . Secondary clarifier and sludge thickening tank with regional precipitation occurs. Flocculation is the process of particulate matter in the water for flocculation of. After adding coagulant in water, colloidal and suspended solids dispersed particles which interact at the molecular force generation floc in the settlement process and they bumped cohesion, its size and quality becomes larger and larger, increasing the settling velocity . Removal of suspended solids settling rate depends not only on, but also the precipitation depth. Surface water formed after adding coagulant alum, sewage organic suspended solids, sludge flocculation phenomenon will appear in the precipitation process. Dosing edit this paragraph polyacrylamide way pharmaceutical drug dosing dosing dosing gravity and pressure dosing, dosing Either way, the solution made by dissolving tank to tank, the liquid dosing point should be set liquid lifting equipment, lifting equipment is commonly used in liquid metering pumps and ejector. A gravity dosing using gravity within the pharmaceutical dosing pump suction pipe or suction bell at the suction well, the use of the pump impeller mixing. 2. Pressure dosing pump or ejector use the drug added to the original cast water pipes for the pharmaceutical investment and added pressure pipes, or need to add a higher elevation cast, the distant water structure. 3 dosing pump dosing pump is to enhance the pool of liquid in the solution to the pressure tube directly using a metering pump and the use of acid which in turn has enhanced role. Before using polyacrylamide are generally formulated to be 0.1% to 0.5% dilution backup solution, the prepared solution is preferably not be stored too long to use this concentration range was needed before use diluted closer 0.01 ~ 0.05 solution, the reason is you can be more ribs in flocculant dispersion in the suspension system, you can reduce the amount, but you can get a better flocculation! Edit this paragraph macroscopic particles anionic anionic polyacrylamide (APAM) Product Description: anionic polyacrylamide (APAM) appearance of a white powder, the molecular weight of from 6 to 25 million water-soluble, can be dissolved in water in any proportion and insoluble in an organic solvent. PH value of the effective range of 7 to 14 in a neutral alkaline medium was characteristic of a high polymer electrolyte, the electrolyte salt sensitive and high metal ions into an insoluble crosslinked gel. Anionic PAM Formula: industrial wastewater treatment: For the suspended particles, representing a high concentration of positively charged particles, water PH value is neutral or alkaline water, iron and steel plant wastewater, electroplating plant wastewater, wastewater metallurgy, coal washing waste water such as sewage treatment, the best results. Drinking Water Treatment: A lot of water from rivers and water plants, sediment and mineral content is high, more turbid, though filtered through the sediment, still can not meet the requirements, needs adding flocculants, inorganic coagulant dosage is 1 / 50, but the effect is several times the inorganic flocculants for serious organic pollution of river water and inorganic flocculants can be used in conjunction with cationic polyacrylamide better. Now adding anionic polyacrylamide, starch particle flocculation and sedimentation, and then the precipitate was filter cake becomes the filter press can be used as feed, alcohol factory alcohol dehydration may also be an anionic polyacrylamide, a filter press for recovery . For river mud settling. Dry strength agents for paper. Paper additives used to help rate agent. In the paper before the opening ceremony slurry storage tank pump with traces of PAM-LB-3 anionic polyacrylamide can fill with water retention fines online 20-30%. Savings per ton of pulp 20-30kg. Example: In the washing process generates large volumes of wastewater discharged directly pollute the environment, the need to Shen Qing recycling, recycling water and slime, but also of great value, but by natural sedimentation, time-consuming, but the water is not clear. In addition, anionic polyacrylamide in incense industry applications are becoming increasingly popular, anionic polyacrylamide Features: with good solubility, high viscosity, high toughness, flammable (less) smoke, burning odor, no toxic characteristics; stable performance, powder and other plants to avoid the common origin of the starch due to different time, bond quality is uneven, while incense production requires repeated testing recipes, product quality in order to avoid instability phenomena; incense product looks smooth, good shape, not broken; especially of its cold water pasting, no cook paste, the material directly mixed evenly, add water and stir both production and materials mixed with water after a long time there will not be placed dry and hard material phenomenon can not be used effectively save energy and facilitate the production operations. Use effect: the use of this product made of incense blanks (incense products) look flat, no breaks, no mildew, bending resistance, good product fineness, baking sun does not fade, time enough to ignite combustible good, over iron chainring no "decapitation" extinction conducive to play an active ingredient in mosquito bulk rate and improve the finished product can reduce the loss in the drying process, but can greatly reduce labor intensity and improve work efficiency. In addition, the product of environmental pollution, green environmental protection to meet the product requirements. Economic benefits: Use of this product may reduce raw material costs 5-12%, 20-30% energy savings. Cationic cationic polyacrylamide (CPAM) Product Features: cationic polyacrylamide (CPAM) the appearance of white powder, ionic degrees from 20% to 55% good water solubility, can be dissolved in water in any proportion and insoluble in organic solvents. Showed high polymer electrolyte properties, with a negative charge and applicable wastewater treatment rich organics. Suitable for high dyeing, paper, food, construction, metallurgy, mineral processing, coal, oil, aquatic products processing industry and other fermented organic colloid content in wastewater treatment, especially for urban sewage, sludge, paper sludge and other industrial dewatering sludge. Characteristics of non-ionic: anionic polyacrylamide PAM series nonionic polymer is a linear polymer having a degree of low ionic content. Because of its particular group, then gives it flocculation, dispersion, thickening, adhesion, film, gel, colloid-stabilizing effect. Sewage treatment agent: When acidic wastewater suspended, for the use of non-ionic polyacrylamide flocculant is more appropriate. Then PAM adsorption bridging role played so flocculation of suspended particles produced, to purify sewage purposes. Can also be used for water purification, and in particular with the use of inorganic coagulant in water treatment works best. Applications: 1, widely used in industrial wastewater treatment, the suspended particles, coarse, high concentration, positively charged ions, water PH value is neutral or alkaline water, steel plant wastewater, wastewater metallurgy, coal washing waste water, etc. Sewage treatment works best. 2, for the oil industry, oil, drilling mud, waste mud treatment, to prevent water channeling, reduced friction, enhanced oil recovery, EOR has been widely used. 3, for textile sizing agents, stable slurry performance, low drop-pulp, fabric breakage rate, clean cloth. 4, for the paper industry. One is to raise fillers, pigments, etc. retention rate; second is to improve the strength of the paper (including dry strength and wet strength). Also, you can improve the paper tear resistance and porosity to improve visual and print performance, but also for the food and tea packaging. Zwitterionic, amphoteric ionic polyacrylamide is a cationic vinyl amide monomer is acrylamide and vinyl monomers copolymerized hydrolysis. Both positive charge on the molecular chain, another negative charge zwitterionic irregular polymer. Edit this paragraph the term security S24/25Avoid contact with skin and eyes. Avoid contact with skin and eyes. Notes Edit this paragraph polyacrylamide CPAM Caution: 1, floc size: small floc will affect the drainage rate, floc floc constraints make much more water and reduce mud biscuits. After select molecular weight polyacrylamide floc size can be adjusted. 2, the sludge characteristics. The first point to understand the source of the sludge characteristics and composition, proportion. Depending on the nature of the different sludge can be divided into two kinds of organic and inorganic sludge. Cationic polyacrylamide for the disposal of organic sludge, the relative anionic polyacrylamide flocculant for inorganic sludge, highly alkaline when using cationic polyacrylamide, anionic polyacrylamide and should not use strong acidic, solid content When sludge is usually high amount of polyacrylamide is also large. 3, floc strength: floc under shear stability should persist without breaking. Advances in molecular weight polyacrylamide or select the appropriate molecular structure helps progress floc stability. 4, the degree of ionic polyacrylamide: for sludge dewatering, the degree of availability of different ionic flocculant Know small test stopped after selection, to select the best suitable polyacrylamide flocculant so that is possible to obtain the best results, Dosing and make the least amount of saving costs. 5, polyacrylamide dissolved: dissolve fat abundant talent to play good flocculation. Sometimes needs to speed up the dissolution rate, then progress can be thought of polyacrylamide concentration of the solution. PAM and PAC can use it when in fact the usual treatment of sewage, some water, a flocculant is not up to using a single effect, you must combine the two to use, and the use of inorganic coagulant PAC polyacrylamide composite flocculant sewage treatment would achieve better results, but adds the agent to pay attention to the order, the order is not correct, but also fail to effect sequential approach polyacrylamide flocculant and other mixed added: use it must be noted that the composite flocculant added sequencing and dosing intervals! PAC and PAM is to make joint use of PAC after the completion of the first and the charge / colloid destabilization small floc formation, and further increase the volume conducive to full floc precipitation. As the PAC PAC reaction time is very short, so the need for a strong mix added, PAM longer duration of action, mixing a strong note after the first weak - the first strong to weak after mixing in order to avoid destruction of floc! Polyacrylamide flocculant belong, belong PAC coagulant, under normal circumstances is to add coagulant coupled with polyacrylamide, but to be safe, it is recommended that you add through experiments to determine the effect of the order! Dosing point, dosage, dosing time and the need to experiment to determine the intensity of mixing, remember that they do not put the two agents used together, otherwise it will affect the results, increasing the cost. Judgment method polyacrylamide flocculant failure often encounter a lot of sewage treatment plants, particularly in the southern region, due to the humid climate, some of the wastewater treatment plant polyacrylamide stacking for a long time, or because the packaging does not tie the mouth leading to absorb moisture caking, For polyacrylamide flocculant caking circumstances, many people have questions about, is not a failure, and also can you then, in fact, as long as this situation you can open it dissolved, solution viscosity, there is no failure, but caking After the dissolution of polyacrylamide is difficult to open, in fact, also means a waste of resources. Different types of polyacrylamide real shelf life is a big difference between this and its associated structures, relatively speaking, the validity of an anionic polyacrylamide longer time points, cationic polyacrylamide general state of our one-year shelf life . Beyond this period are considered to exceed the shelf life. There is the risk of failure,