The diversity of water treatment agents.

Water treatment agent is a kind of water treatment chemicals used in the general, common water treatment agents are: flocculating agent, seven water ferrous sulfate, polymerization ferric salt, calcium hydroxide, ferric chloride hexahydrate, stannic chloride pentahydrate algae fungicidal, chlorine dioxide, scale inhibitor, polyacrylamide (cationic, anionic and non-ionic), polyaluminium chloride, polyaluminium chloride iron, ferrous sulfate, etc.

Corrosion inhibitor

Inhibitor class in the form of the appropriate concentration and additive in the water, can prevent or slow water chemicals of corrosion on the metal material or equipment, has a good effect, less consumption, convenient use, etc.

The types and varieties of corrosion inhibitors can be divided into inorganic inhibitors and organic inhibitors according to the types of their compounds.According to their inhibitory reaction, anodic reaction, cathodic reaction or both, can be divided into anode corrosion inhibitor, cathodic inhibitor or mixed corrosion inhibitor.The corrosion inhibitor can be divided into passivation film type, precipitation film type and adsorption film type according to the mechanism of forming protective film on metal surface.At present, the passivated film corrosion inhibitors, such as chromate, nitrite and molybdate, are commonly used in water treatment.The commonly used precipitation film corrosion inhibitors have polymerized phosphate, zinc salt, etc.Commonly used adsorption film type corrosion inhibitors such as organic amine and so on.

Scale inhibitors

The scale inhibitor, also known as scale inhibitor, refers to a class of chemicals that can inhibit the formation of scale and scale of calcium and magnesium in water.There are natural scale inhibitors such as tannin and lignin derivatives;Inorganic scale inhibitors such as sodium hexametaphosphate, sodium tripolyphosphate, etc.Organic and macromolecule scale inhibitor, which has the best effect of polymer scale inhibitor, has a promising future.There are two types of organic and macromolecular scale inhibitors used in water treatment: organic phosphonic acids such as EDTMP (ethylenediamine tetramethylphosphonic acid), HEDP (hydroxyl diphosphonic acid), etc.Polycarboxylic acid, such as polyacrylate, hydrolyzed polymaleic anhydride, etc.The scale inhibition of these two kinds of scale inhibitors is usually achieved through lattice distortion and dispersion - condensation, which is widely used in oilfield water, boiler water and industrial cooling water.

fungicide

Fungicides are also known as bactericidal agents or sludge removers, anti-sludge agents, etc., which are used to inhibit the growth of microorganisms such as algae in the water, so as to prevent the formation of microbial mucous chemicals.It is usually divided into oxidizing fungicides and non-oxidizing fungicides.Oxidizing fungicides, such as commonly used chlorine, sodium hypochlorite, bleaching powder, etc.Non-oxidizing fungicides are effective and widely used to destroy bacterial cell walls and cytoplasmic chemicals such as quaternary ammonium salts.Quaternary ammonium salt in such as chlorinated dodecyl dimethyl benzyl ammonium bromide or dodecyl dimethyl benzyl ammonium, etc., often with a variety of action such as sterilization, stripping, corrosion, promising, has been applied in oil field water, industrial cooling water, etc.

Cleaning agent

A special cleaning agent used in oil field water treatment chemicals, can eliminate the mechanical impurity and oil in the oily wastewater, its role in addition to the above-mentioned flocculant separation of suspended solids or mechanical impurities, also has the oil-water separation purification effect.Therefore, in addition to the general flocculant ingredients such as aluminum salt and polyacrylamide, this kind of purifying agent often contains some surfactant.For the purification effect of the purifying agent, the membrane filter is generally used to determine the purification effect of filter film factor (see filter).

cleaner

The cleaning agent is a kind of chemical with cleaning effect.In the process of water treatment, some chemicals are often used to clean the surface sediments of the metal equipment, such as corrosion products and scale, and microbial slime.According to different cleaning requirements, the cleaning agent can be divided into acid lotion such as hydrochloric acid, sulfuric acid, hydrofluoric acid, citric acid, etc.Passivating agents such as sodium benzoate.Currently, the use of sodium sulfonated succinate is a surfactant, which is used as a special cleaning agent to clean the oil and rust of the metal surface.

Thus, water treatment agents are very diverse products!