Explanation

A chemical agent that can be dispersed in water to treat industrial and domestic water and make it harmless. Including coagulant, dispersing agent, fungicide, cleaner, prefilm agent, defoamer, decolorant, chelating agents, deoxidizer, ion exchange resin, etc. The main function is to control the formation of scale and sludge, reduce foam, reduce corrosion of materials in contact with water, remove suspended solids and toxic substances in water, deodorize, decolorize, bating and stabilize water quality. Commonly used corrosion and scale inhibitors, germicide and algicide and coagulant. ① corrosion and scale inhibitors can control scaling and metal corrosion. Organic phosphonic acids, such as HEDP (hydroxyethylenediphosphonic acid), HPMA (hydrolyzed polymaleic anhydride), BTA (benzo=azole), are widely used in oilfield water, boiler water, industrial cooling water and other systems. ② The germicide and algicide mainly include oxidized peracetic acid, 2,2-dibro-3-nitropropenylamine (DBNPA), chlorine and its products [such as Na ü Cl, Ca (() C1) 2], and non oxidized quaternary ammonium salts (such as dithiocyanomethane, glutaraldehyde, etc.). The bactericidal mechanism mainly hinders the body's absorption, inhibits protein production, destroys cell walls, and hinders nucleic acid synthesis, thereby playing a bactericidal and algal role. Peroxyacetic acid can oxidize bacterial proteins, causing microbial death and inhibiting their growth and metabolism; DBNPA can quickly penetrate the cell membrane of microorganisms and undergo chemical reactions with some protein groups, causing the normal redox process of cells to terminate and die. Its branches can also selectively brominate or oxidize special enzyme metabolites of microorganisms, ultimately leading to microbial death.

Classification