Scale inhibitor: can disperse insoluble inorganic salts in water, prevent or interfere with the precipitation and scaling of insoluble inorganic salts on metal surfaces, and maintain good heat transfer performance of metal equipment. The present invention is prepared as a single component using epoxy resin and specific amino resin as substrates, with appropriate amounts of various rust and anti-corrosion additives added. It has excellent shielding, impermeability, rust resistance, good scale inhibition, thermal conductivity, excellent resistance to weak acids, strong alkalis, organic solvents, etc., strong adhesion, bright, flexible, dense, and hard paint film.

Folding editing mechanism

From the perspective of the mechanism of action of scale inhibitors, their scale inhibition effect can be divided into three aspects: chelation, dispersion, and lattice distortion. In laboratory evaluation experiments, dispersion is a remedial measure for coupling effects, and lattice distortion effect is a remedial measure for dispersion effects.

Functional characteristics of high-efficiency reverse osmosis scale inhibitors

1. No additional acid needs to be added, which can effectively avoid corrosion of equipment by acidic substances.

The chelation effect is stable and can prevent metal ions such as iron and manganese from forming dirt on the membrane tube.

III. Suitable for various membrane tube materials.

The most economical scale inhibition control can be achieved with less dosage and lower cost.

5. Strong anti scaling ability, suitable for various water quality, with good effect, can reduce membrane cleaning and extend the service life of the membrane.

The scale inhibition effect and stability of this scale inhibitor are significantly better than those of sodium hexametaphosphate or pure polymer scale inhibitors.

Folding chelation

Chelation is the process in which a central ion binds to two or more coordinating atoms of the same bidentate ligand. The result of chelation is that scaling cations (such as Ca2+, Mg2+, etc.) react with chelating agents to form stable chelates, thereby preventing them from coming into contact with scaling anions (such as CO32-, SO42-, PO43-, and sio32-), greatly reducing the probability of scaling. Chelation is stoichiometric, for example, when an EDTA molecule binds to a divalent metal ion.

The chelating ability of chelating agents can be expressed by the calcium chelation value. In general, commercially available water treatment agents (with 50% mass fraction of the following active components, calculated as CaCO3): aminotrimethylphosphonic acid (ATMP) -300mg/g; Diethylenetriamine pentamethylene phosphonic acid (dtpmp) -450mg/g; Ethylenediaminetetraacetic acid (EDTA) -150m/g; Hydroxyethyl diphosphonic acid (HEDP) -45 OM. That is to say, 1mg chelating agent can only chelate calcium carbonate scale smaller than 0.5mg. If stable calcium and magnesium ions with a total hardness of smm0fl are required in the circulating water system, a chelating agent of 1000m/L is required, which is economical. Therefore, the contribution of scale inhibitor chelation is only a small part. However, the chelating effect of scale inhibitors plays an important role in water with medium to low hardness.

Folding dispersion

The result of dispersion is to prevent the contact and aggregation of oxide skin particles, thereby preventing the growth of oxide skin. Scaling particles can be calcium and magnesium ions, or composed of hundreds of CaCO3 and MgCO3 molecules, as well as dust, sediment, or other water insoluble substances. Dispersants are polymers with a certain relative molecular weight (or degree of polymerization), and their dispersibility is closely related to the relative molecular weight (or degree of polymerization). The degree of polymerization is too low, the number of adsorbed and dispersed particles is small, and the dispersion efficiency is low; If the degree of polymerization is too high and the number of adsorbed and dispersed particles is too large, the water will become turbid and even form flocculent substances (in this case, its effect is similar to that of flocculants). Compared to chelation, dispersion is effective. The results indicate that 1mg dispersant can stabilize 10-100mg of scaling particles in circulating water. The dispersion effect of scale inhibitors plays an important role in medium to high hardness water.

Folding lattice distortion

When the hardness and alkalinity of the system are high, and the chelating agent and dispersant are insufficient to prevent them from completely precipitating, they will inevitably precipitate. If there is no solid scale on the surface of the heat exchanger, scale will grow on the surface of the heat exchanger. If there is sufficient dispersant, dirt particles (composed of hundreds of calcium carbonate molecules) are absorbed.