Organic coagulant and inorganic coagulant dosing should pay attention to what? Organic coagulant and inorganic coagulant dosing should pay attention to what? To prevent coagulant deterioration or other chemical reactions, the water used to configure the coagulant solution should be deionized pure water or clean tap water. Each coagulant should have its own preparation and dosing system, can not be mixed to avoid chemical reactions and reduce the coagulation reaction. Dosing concentration should be appropriate, the organic coagulant, the concentration should be as low as possible, so as to ensure that it and raw water sol evenly mixed to fully play the role of adsorption bridge; inorganic coagulant is determined according to the actual situation. Polyacrylamide contour polymerization macromolecule coagulant, stirring speed generally not exceed 150-200r / min; other coagulants available 200-300r / min. The preparation of coagulant concentration, generally 10% -20% by weight of the product configuration, but the stability of some coagulants and its concentration is closely related to the configuration should be based on the principle of stability. If the concentration of polyacrylamide solution is too low, the stability is poor, easy to degrade and affect the coagulation effect; if the concentration is too high and difficult to stir, such as mixing time is too long, coagulation effect; if the concentration is too high and not easy to stir, Such as stirring for a long time, but also easy to chain off and reduce the effect. Preparation of the coagulant solution to store the stock solution is appropriate dosing dilution, diluted immediately after injection to avoid degradation failure. Coagulant and coagulant dosing should pay attention to: 1) mixing speed is faster In order to make the pharmaceutical mixture of fine alum phase further growth, requiring water flow to produce intense vortex, so the agent should be caused by the water flow violently Under the conditions of input, the mixing time is completed in about 10-30s, generally not more than 2mn; 2) intermittent dosing added coagulant mixed at intervals of time, then add coagulant, which is conducive to alum increased; ) Dosing mode, there are continuous dosing, interval dosing, concentration dosing, intermittent dosing and other dosing methods, according to the specific circumstances and experimental mode of administration; d) dosing time within the pipeline dosing mixing equipment from the subsequent treatment of structures should The closer you are, the more direct connection you have. If the pipe connection, the pipe flow rate within the 0.8-1.0m / s is appropriate, the residence time within the pipe should be less than 2min, that is, from the point of administration to follow-up treatment of the structure of the pipe does not exceed the distance of 120m.