Home > Industry Knowledge > Content

The basic knowledge of water purification(2)

Sep 22, 2017

11, desalted water: refers to the water salts (mainly soluble in water strong electrolyte) to remove or reduce to a certain degree of water. 1.0-10.0μS / cm, resistivity (25 ℃) 1-10 MΩ · CM salt content of 1-5mg / L.

    12, pure water: refers to the water of strong electrolytes and weak electrolytes (such as SiO2, CO2, etc.) to remove or reduce to a certain degree of water. Its conductivity is generally: 1.0-0.1μS / cm, resistivity MΩ · CM. Salinity <1mg / L.

    13, ultra-pure water: refers to the water almost completely remove the dielectric, while not decomposition of the gas, colloid and organic matter (including bacteria, etc.) also removed to a very low degree of water. Its conductivity is generally 0.1-0.55μS / cm, resistivity (25 ℃) 10 MΩ · CM. Salt content <0.1mg / L. Ideal water (theoretical) Conductivity 0.05μS / cm, resistivity (25 ℃) 18.3 MΩ · CM.

    14, groundwater: rainwater through the soil and the formation of the infiltration of water and the formation of water, in its long process and extensive contact, into the more salt, high hardness, but at the same time groundwater through layers of filtration, suspension Very little water, clear water, low turbidity.

    15, surface water: refers to the rain and snow, rivers, lakes and marine water, in addition to marine salt content is very high, the other surface water is an important feature of low salt content, low hardness, but pollution is very high. Municipal water supply (tap water) mainly refers to the municipal water supply treated by the water plant. This is a more common way of drinking water. Due to the huge difference between the source of water, so the national standard is also more relaxed response. Water plant after precipitation, filtration, chlorination after disinfection. Transported to millions of households. This method is relatively stable water quality, generally do not have too much ups and downs, but the water can be described as rough, widely used, can not be industrial, living and drinking water separately, can not meet the high standards of drinking water, high demand, But also in the long transport or storage process caused by secondary pollution is also very serious. People have to boil and then use, and boil in addition to sterilization, but can not remove other dirt, and some substances even more boiled the more concentrated, endangering the human body.

    16, magnetization: the use of magnetic field effect on the treatment of water, known as the magnetization of water.

    17, mineralization: refers to the addition of beneficial minerals in clean water. In particular, it is important to note that, first, this water must be a clean water after a strict treatment. Because the impurities in the water sometimes react with the ore to produce other substances; second, the ore must be strictly screened, and through special processes such as high temperature distillation, decarburization to turbidity before use

    18, adsorption of water purification technology: mainly refers to activated carbon and other adsorption capacity of the material adsorption technology. Here only some of the characteristics of activated carbon, to do a brief introduction: activated carbon is widely used in drinking water and food industry, chemical, power and other industrial water purification, dehydrogenation, degreasing and deodorant and so on. Typically, 63% -86% colloidal material can be removed; about 50% iron; and 47% to 60% organic matter.

    19, precision filtration technology: made of special materials, microporous filter, filter, the use of its uniform aperture, to intercept the water particles, bacteria, so that it can not pass through the filter, the filter was removed to retain. Precision filtration can filter microns (μm) or nanoscale (nm) particles and bacteria. In the depth of water treatment is also widely used.

20, ultrafiltration technology: ultrafiltration is a film separation technology. That is, under a certain pressure (pressure of 0.07-0.7Mpa, the maximum does not exceed 1.05Mpa), water flow on the membrane surface, water and dissolved salt and other electrolytes are tiny particles that can penetrate the ultrafiltration membrane, while the molecular weight Particles and colloidal substances are blocked by the ultrafiltration membrane, so that part of the water particles to be separated from the technology. The pore size of the ultrafiltration membrane is determined by interception test with a certain molecular weight and is expressed as a numerical value of the molecular weight.