The selection of circulating water treatment equipment should consider the 5 characteristics of Circulating Water

 Circulating Water Treatment EquipmentThere are a lot of devices on the market, but one device can solve all the problems of Circulating Water. Many circulating water treatment equipment did not fully consider the problem during design. The circulating water treatment equipment should be designed for problems existing in circulating water to achieve the best circulating water treatment effect. So what are the problems with circulating water? Koliqing tells you that there are five points in total:

(1) device Corrosion

In the circulating cooling water system, a large number of equipment is made of metal. The long-term use of circulating cooling water will lead to corrosion and perforation. This is caused by a variety of factors, mainly including: electrochemical corrosion caused by dissolved oxygen in cooling water; corrosion caused by harmful ions (Cl-and SO2-); microorganisms (anaerobic bacteria and iron bacteria) corrosion. Equipment wall corrosion perforation may cause leakage, or the process medium may leak into the cooling water, loss of materials, pollution of water; or cooling water may penetrate into the process medium, affecting product quality, causing economic losses, and affecting safety.

(2) harmful ions

When the concentration of some harmful ions such as Cl-and so2-ion increases, the corrosion of carbon steel will be accelerated. Cl-and so42-may reduce the protection performance of the metal protective film, especially when the Cl-radius is small and the penetration is strong. It is easy to replace oxygen atoms in the film layer to form chloride and accelerate the process of anode, it accelerates corrosion, so chlorine atoms are one of the reasons for pitting corrosion.

(3) Dissolved Oxygen

In the circulating cooling water system, a large number of equipment are metal-made heat exchangers. Due to the full contact between water and air in the open system, the dissolved O2 in water can reach saturation, when carbon steel is in contact with cooling water dissolved with oxygen, many corrosive micro-batteries are formed on the carbon steel surface due to the non-uniformity of the metal surface and the conductivity of cooling water, the following oxidation and reduction reactions occur in the anode and cathode areas of the micro-battery respectively. These reactions have led to the constant dissolution and corrosion of metals in the anode zone of the micro-battery.

In the anode zone Fe = Fe2 + + 2e, In the cathode Zone 1/2o2 + H2O + 2e = 2OH-

In water, Fe2 + + 2OH-= Fe (OH) 2 Fe (OH) 2 → Fe (OH) 3

(4) Microorganisms

Due to the supply of nutrients and ions necessary for microbial growth by water and organic and inorganic substances from the surrounding air, material leakage in the production process also provides nutrients for microbial populations in the circulating water system, the large surface area provided by pipelines, heat exchangers, cooling tower fillers and water distribution pipeline systems effectively promotes the growth of microbial populations. In circulating water, microbial growth has brought great harm to the circulating water system. A large amount of microbial mucus makes the floating impurities and chemical sediment in the water stick to the heat transfer surface of the heat exchanger, that is, biological mud or soft dirt. In addition to corrosion, the sticking mud can also reduce the flow of cooling water and reduce the cooling efficiency of the heat exchanger. In severe cases, the pipeline will be blocked, forcing production to stop cleaning.

(5) Scale

Generally, heavy carbonate is dissolved in natural water, and the formation of scale should be prevented. In the circulating cooling water system, the concentration of carbonate increases with evaporation and concentration. When the concentration reaches saturation, or when the heat transfer surface of the heat exchanger causes the water temperature to rise, a decomposition reaction occurs, calcium carbonate precipitation is generated. Calcium carbonate is deposited on the surface of the heat exchanger to form a dense calcium carbonate scale, which has poor thermal conductivity, thus reducing the heat transfer efficiency of the heat exchanger. In severe cases, the heat exchanger is blocked and the system resistance increases, the efficiency of water pumps and cooling towers is reduced, production energy consumption is increased, production is reduced, local corrosion is accelerated, and abnormal shutdown is even caused.

 

No matter what the circulating water system is, there will be the above five problems. Therefore, a good circulating water treatment equipment should be able to address the above five problems and be able to achieve reasonable treatment. Keli Clear Circulating Water Treatment Equipment is such a kind of equipment, it uses a new technology, it can be said that it is the only device on the market that can comprehensively handle the above five problems, and it is completely handled using pure physical methods, which is safe and reliable.

 

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