Supply Shanghai high cationic polyacrylamide, Denon brand polyacrylamide

The use of polyacrylamide to the following principles: 1. granular polyacrylamide flocculant is added to the sewage can not direct investment. It must first be dissolved in water before use, with an aqueous solution to sewage treatment. 2, dissolving particulate polymer should be clean water (such as water), it can not be sewage. The water can be at room temperature, generally does not require heating. Water temperature is below 5 ℃ dissolve very slowly. Temperature increase dissolve faster, but more than 40 ℃ will accelerate the degradation of the polymer, affect the results. Usually tap water is suitable for the preparation of a polymer solution. Acid, alkali, high salinity of the water is not suitable for preparation. 3, polyacrylamide rigorous contact with iron, iron will degrade the molecular chain polyacrylamide. 4. The choice of the concentration of the polymer solution, the proposed 0.1% -0.3%, or 1 liter of water plus 1g-3g polymer powder. PAM concentrations choose to consider the following factors: preparation of small and large cans daily medication, it is recommended with a little bit strong (eg 0.3%). When the high molecular weight polymer, with slightly dilute some of the recommendations (such as 0.1%). The polymer solution put into the sewage, as a result of equipment is not very good dispersion of reasons, some of the recommendations with slightly dilute. In short, the polymer concentration is too big, it will cause the stirrer motor load is too large, can also cause sewage into the dispersion of bad, affect the results. Some worthy dilute help improve results. 4, dubbed the solution do not use centrifugal transfer, so as not to cause the blades rotating at high speed shear degradation of the polymer. Specific method of preparation is as follows: a certain amount of water in a solvent (such as laboratory beaker, factory adjusting tank), press the water volume and concentration calculations required amount of polymer powder, called a polymer. 14 production steps Editing (1) according to the polymerization recipe weighed aqueous solution of acrylamide, quaternary ammonium monomers, deionized water to the mixing vessel. Cationic polyacrylamide production flow chart (2) for 15: min, a small amount of concentrated HCl solution pH adjusted to a predetermined value. (3) After adjusting the temperature to a predetermined value, the solution has been added into the bag a certain amount of azo polymerization initiator Baowenrongqi inside, fitted with temperature loggers. Nitrogen blowing 30min, oxygen. (Initiator and consumption V65: 1000mge / L; PA a 5: 20mff / L: Per: 40mg / L: CuS04: 0.25mff / L; EDTA: 0.73mg / L: NaFS: 40rag / L.) (4 ) required a certain amount of oxidants, reducing agents and other additives. Stop blowing nitrogen, sealed. (5) The reaction 4h, xanthan gum pieces taken out, cooled at room temperature. (Reaction temperature polymerization conditions: 20%; pH of the reaction: 7) (6) after the gel block cut blocks with cooking pelletizer. (7) to release 60 ℃ oven for 12h. (8) grinding, sieving, bagging. (9) Analysis of solid content, relative molecular mass and other indicators. Cationic polyacrylamide production process shown in Figure 3-19. 15 Note CPAM Caution: 1, floc size: floc is too small will affect the drainage rate, floc floc constraints make much more water and reduce the mud biscuits. After selecting the molecular weight polyacrylamide can adjust the size of floc. 2, sludge characteristics. The first point to understand the source of sludge characteristics and composition, proportion. Depending on the nature of the different sludge can be divided into two kinds of organic and inorganic sludge. CPAM for disposal of biosolids, the relative anionic polyacrylamide flocculant for mineral sludge, strong alkaline when cationic polyacrylamide, anionic polyacrylamide and should not be used when very acidic, solid content high amount of sludge is usually polyacrylamide is also large. 3, floc strength: floc under shear should insist on steady without breaking. Advances in molecular weight polyacrylamide or select the appropriate molecular structure to help improve floc stability. 4, the degree of ionic polyacrylamide: for dewatered sludge, flocculant available ions of different small test do first stop through the selection, select the best suitable polyacrylamide flocculant thus being able to obtain the best effect, but also make dosage minimal cost savings. 5, polyacrylamide dissolved: dissolve hair good talents full play flocculation. Sometimes it needs to speed up the dissolution rate, when the concentration of progress can think of polyacrylamide solutions. 16 Common editing a field, as flocculants, mainly used in industrial solid-liquid separation process, including sedimentation, clarification, concentration and sludge dewatering processes, applications, major industries: urban sewage treatment, paper industry, food processing industry petrochemical industry, metallurgical industry, mineral industry, dyeing industry and the sugar industry and a variety of industrial wastewater treatment. The use in urban sewage and meat, poultry and food processing wastewater treatment process sludge sedimentation and sludge dewatering, through which contains positively charged groups of the sludge in organic colloid electrically negative charge and the role and Polymer excellent cohesion bridging function, promote aggregation of colloidal particles into large floc is separated from the suspension. The effect is obvious, low dosage. 2, can be used in the paper industry paper dry strength agents, retention agents, filter aids, can greatly improve the paper quality, save costs and improve the paper mill's production capacity. Electrostatic bridge can occur directly in order to achieve enhanced physical strength of paper, reduce the loss of fibers or fillers to accelerate drainage, from the enhanced retention of inorganic ions, fiber and other organic polymers, filter aids, can also be used Whitewater treatment, while in the de-inking process can play a significant flocculation. 3, fiber slurry (asbestos - cement products) and allows molding asbestos - cement products, and drainage is improved, the strength of the asbestos blank improved; insulating board, you can increase the binding capacity of additives and fibers. 4, in the mining, coal preparation industry can be used for mine waste water, coal washing wastewater clarifier. 5, can be used for dyeing wastewater, leather wastewater, oily wastewater treatment, so turbidity, bleaching, in order to meet emission standards. 6, in the phosphoric acid purification, and contribute to the separation process in WPA gypsum. 7, river water is used to water plants water treatment flocculant. 8. polyacrylamide flocculant dissolution method, and the storage conditions of polyacrylamide as water-soluble polymers, in general, the particulate polyacrylamide in a dry, cool place can be stored for more than two years, dubbed the solution, its storage time is very limited. In general, the concentration of 0.1%, non-anionic polymer solution is not more than one week; cationic polymer solution is not more than a day. Solution stability and concentration, with the more concentrated (such as 3% -5%) was stored longer. But 3% -5% of the solution can not go directly to the treatment of sewage, but also diluted before use. Cationic solution stable when PH is less than 5, due to rapid hydrolysis and failure PH greater than 6. Iron and calcium and magnesium ions sensitive than the anionic polymer. Density Select to consider the following factors:. A pot preparation small amount of medication a day, with a little bit strong recommendation (eg 0.3%). b. a high molecular weight polymer, with slightly dilute some of the recommendations (eg, 0.1%). Time calculations in different seasons: 1. In the summer the water temperature is high, overcast, cationic polymers Stir for about 1 hour, non-ionic polymer need stirring for 2 hours; 2. In winter the water temperature is low, anions and cations polymer need stirring for about 1.5 hours, the non-ionic polymer need stirring for about 3 hours; 3. Also, the higher the concentration of the preparation, the polymer was dissolved faster. Dissolve uneven or full does not affect the results. Iron is the catalyst for all of polyacrylamide cause chemical degradation, so that in the preparation, transfer, stockpiling polyacrylamide solution, we should try to avoid iron ions to enter. Equipment contact with the solution preferably stainless steel, plastic, glass, steel or painted carbon steel surface 17 as long as the selection of applications where sewage, sludge produced there, so that sewage sludge is an inevitable product of Different sewage sludge to produce different sludge generally divided according to their different components of organic sludge and inorganic sludge. In order to improve the performance of the sludge dewatering, sludge conditioning process to use sludge dewatering, sludge dewatering agent of choice is the general principle of treating organic sludge with cationic polyacrylamide, inorganic sludge processing time is usually anionic polyacrylamide. Strong alkaline sludge is generally not suitable selection cationic polyacrylamide. Very acidic generally unsuitable choice anionic polyacrylamide products. Grasp handle a variety of industrial sludge or sewage sludge is life different process to choose different types of sludge dewatering sludge agents according to the characteristics of the various properties of polyacrylamide understanding must be sufficiently comprehensive, more accurate its sludge properties to the preferred best sludge conditioning agent, solid content is higher when the amount of consumption of drugs in general sludge dewatering is relatively larger in the application of industry, Suzhou Hao Connaught sludge dewatering more accurate understanding of agents in different sectors for different sludge polyacrylamide products. With the diversification of polyacrylamide products, more and more varieties of standard models, sometimes polyacrylamide selection problem is indeed a headache. Faced with an array of polyacrylamide product model, does not know how to start; After nearly seven years of research, and a large number of experiments, compared to international brands, such as Japan's Mitsubishi Chemical, Japan's Mitsui Chemicals, Sumitomo Chemical, Japan TOAGOSEI polyacrylamide flocculant SNF France, Germany and the USA and Italy angel polyacrylamide polyacrylamide Korea and other product specifications comparison, of which there are many common problems; each brand has its own advantages of the product manufacturers, the industry pollution Mud complexity of the brand manufacturers to accelerate polyacrylamide refined product model, whether it is a centrifuge or belt-type machine, even one machine has its specific product attributes to match its sludge. Solution polymerization, inverse emulsion polymerization, suspension polymerization method for industrial preparation on 18 AM and monomer derivatives are prepared by free radical polymerization of homopolymers and copolymers, and the radical polymerization can be used again legitimate AM and solid Jay polymerization, to obtain various types of common requirements produced pT-resistant products is controlled molecular weight, less water soluble and residual monomers, so that product quality and uniformity, stability, ease of use and lower cost of production is the production of today's PAM the direction of technology development. Homogeneous aqueous solution polymerization is the oldest method of PAM production history, because of its simple operation easy, polymer yield and less environmental pollution, is still a large proportion. At the same time the study of a homogeneous solution polymerization are going deeper, affecting agent system, medium PH, additives, solvents and temperature on the properties and polymerization initiator, etc., such as product performance. AM aqueous solution at an appropriate temperature, you can use almost all the way to radical polymerization initiator polymerization, the polymerization process can also follow the general rule of freedom polymerization mechanism. The industry's most commonly used is thermal initiators and redox initiator decomposition, with different types of initiator, the polymerization product structure and molecular weight were significantly different. AM exothermic polymerization reaction volume, about 82.8kJ / mol (1170kJ / kg), and the viscosity of the aqueous PAM and large, it is difficult to heat. Industrial production based on product performance and dosage requirements, can be low concentration ((8-12%), concentration (20 ^ -30%) or high (> 40%) polymerization low concentration polymerization product is mainly used for the preparation of an aqueous solution , medium or high concentrations used in the production of powdered polymeric product is non-toxic, pay attention to moisture, rain, avoid sun exposure storage period: 2 years, 25kg paper bag (lined with plastic bags of plastic coated outer kraft paper bags).