Water Treatment Chemicals Applications
Water treatment chemicals play an important role in the fields of industrial water treatment, domestic water treatment, sewage treatment, and desalination. As a water treatment chemicals supplier, it is the responsibility and obligation of IRO to let customers know that water treatment chemicals are used in different fields. This article will explain the application of water treatment chemicals from the above fields
Industrial Water Treatment
Industrial water plays a very important role in the industrial system. The amount of cooling water used in industrial water ranks first. It is generally above 60%.
Industrial water conservation is an important part of protecting water resources. Water conservation must first start with industrial water. Cooling water is the primary goal. The main way to save cooling water is to use a circulating cooling method and increase the concentration factor.
Industrial cooling water is generally divided into two types. DC cooling water and circulating cooling water.
The DC cooling water discharges the water used for cooling directly to rivers and lakes. This is a one-time use. This will result in wasted resources.
The circulating cooling water is used for cooling after the used water is cooled by the cooling tower. The entire water system is in a dynamic process that is constantly circulating and belongs to multiple uses.
The circulating water cooling system is divided into closed and open type.
The cooling water of the open circulating water cooling system is cooled by a cooling tower. The cooling water is exposed during the recycling process. The amount of water will change. The various minerals and ions in the water will continue to increase in concentration. This requires a quantitative replenishment of the system and the discharge of a quantity of concentrated water.
The closed circulating cooling water system uses a closed cooling device. Water flows in the tube. Not directly exposed to the air. The heat of the return water is taken away by other heat exchange medium to achieve the effect of cooling.
Both circulating water cooling systems have to solve scaling, corrosion, and microbiological problems piping and equipment.
The chemicals used in industrial circulating water treatment mainly include scale inhibitors, corrosion inhibitors, bactericidal algaecides, cleaning agents, pre-filming agents, and the like.
Drinking Water Treatment
The production of drinking water is vital to society. To ensure public health and safety and eliminate the emergence of waterborne diseases. Add suitable water treatment chemicals to produce qualified domestic water.
The key points that need to be addressed are the following.
- Algae control to reduce toxic or odorous algae in the reservoir.
- Flocculation process to remove suspended and colloidal solids such as clay.
- Softening process to remove calcium and magnesium salts, especially carbonates and bicarbonates.
- Corrosion control, used to reduce corrosion of pipelines; sterilization and disinfection.
Water treatment chemicals involved in drinking water treatment generally include bactericidal algaecides, flocculants, corrosion inhibitors (ATMP), and the like.
Sewage Water Treatment
Sewage water usually contains harmful toxins, bacteria, oils, oils, heavy metals, impurities from pharmaceuticals, nutrients, viruses and other impurities.
Discharge sewage directly into the natural environment. These pollutants can disrupt ecosystems and life cycles. Remove all pollutants from the sewage. This process requires the combination of several separate wastewater treatment methods to achieve layer-by-layer purification and step-by-step filtration. Until the water is completely removed.
A complete and efficient sewage treatment system is divided into three levels. Primary treatment, secondary treatment, and tertiary treatment.
Primary treatment is at the bottom of the entire wastewater treatment system. Mainly used to remove large suspended solids in water. Physical decontamination is generally used. The larger suspended matter in the sewage is usually removed by adsorption using alum or carbon block. The adsorbed sewage enters the secondary treatment.
Secondary treatment refers to the use of biochemical treatment to remove colloidal and dissolved organic contaminants in water. Biochemical reactions are used to precipitate organic contaminants in water. The treated sewage basically meets the emission requirements. This can be used for specific purposes.
Secondary treatment is typically carried out by means of a fluidized bed biofilm process. The biofilm is formed by self-propagation by microorganisms adhering to the filler to carry out filming in water. This is used to treat soil contamination. The main principle is to treat the sewage by degrading the organic matter in the water by aquatic organisms.
The tertiary treatment is the highest level of treatment of the sewage. Sewage will be decontaminated to the maximum extent at this stage.
The tertiary processing is also called deep processing. It is mainly used to dissolve organic matter and dissolved salts which are difficult to be biodegraded in sewage. The advanced treated sewage has good water quality. It can be directly used in the production of industrial production, and the purpose of sewage treatment is basically realized.
The water treatment chemicals involved in sewage treatment generally include flocculants, sludge dehydrating agents, defoaming agents, chelating agents, decolorizing agents, and the like
The development of desalination began in the 1960s. After decades of development, seawater desalination technology has been relatively mature. Among them, distillation and membrane methods have become mainstream technologies.
At present, the international distillation method still dominates the entire desalination market. However, its development speed lags behind the reverse osmosis method. The distillation method refers to a method in which seawater is desalinated by thermal energy.
For the membrane method. During the seawater desalination operation, changes in seawater temperature, pH, ion concentration, and the like occur. Calcium and magnesium ions in seawater may form carbonate, sulfate, and hydroxide precipitates. This will block the pores of the membrane and reduce the water permeability of the membrane. It is necessary to add a water treatment chemical to the water to reduce the effect of scale deposition on the reverse osmosis membrane.
For the distillation method. It is easy to produce scale and reduce evaporation efficiency. Pre-treatment with seawater can be used to reduce the impact. A water treatment chemical such as an organic phosphoric acid is added to the raw water to soften the water. The chelation of calcium, magnesium ions and other metal ions makes it difficult to precipitate and prevent the formation of scale.
The above is the application of water treatment chemicals in different fields. If you have questions, contact us.