The scaling problem of closed cooling towers has always been plagued. With the volatilization of the sprayed water, the concentration of calcium and magnesium plasma in the sprayed water in the catchment pan is getting higher and higher. The dissolved salts in the supply water are condensed in the circulation process and other insoluble salts, and then scale damage occurs. The cause of scale in the supersaturated solution of insoluble salt in the spray water is not only the concentration of the salt in the circulating water, but also the partial concentration of the salt on the surface of the heat transfer tube of the heat exchanger and the increase of the water temperature to make the solubility of the quasi-soluble salt The reduction causes the precipitation of magnesium ions to form scale.
1. The causes of scale and the damage of scale:
It is more common for closed cooling towers to have scale. The occurrence of scale is the same as that of boiling water in a kettle used at home. Tap water is a kind of hard water. There are many impurities in the water. Under the influence of high temperature, it will quickly differentiate. After differentiation, the ions will combine to form calcium carbonate, and the bottom of the precipitation will form scale after long-term accumulation. The closed cooling tower has a cooling coil, and the cooling medium in the cooling coil has a lot of circulating spray water on the outer layer. Below, trlon air-conditioning takes a closed cooling tower as an example to introduce the composition of scale and the influence of scale on the cooling tower.
The temperature of the cooling coil of the cooling tower is very high. A lot of spray water sprays the cooling water on the surface of the cooling coil through the spray system, and the water on the surface will quickly absorb the heat conducted by the cooling coil and evaporate. The spray water contains a lot of calcium bicarbonate and magnesium bicarbonate, and it will rapidly differentiate in the high temperature and combine with the carbon dioxide in the air to form calcium carbonate. Calcium carbonate will adhere to the surface of the cooling coil and continue to accumulate to form a lot of white scale, which is also calcium carbonate. The scale will accumulate more and more on the outside of the cooling coil. The scale of the cooling tower will have a relatively large impact on the cooling power of the cooling tower. There is scale on the surface, and the spray water cannot directly contact the cooling coil, but can only absorb the heat transferred from the coil to the scale, which will greatly reduce the water. The heat absorption and heat conduction. The use of distilled water when using the cooling tower will solve this plan well. Distilled water is pure water and does not contain any impurities. At the beginning, the cooling tower will be mixed with air and dirt and other impurities during the operation, which will increase the difficulty of scale cleaning in one step. Therefore, we recommend that customers use our dedicated descaling agent for closed cooling towers.
2. Advantages of descaling agent (cleaning agent) for closed cooling towers:
XQ-103 closed cooling tower descaling agent is a light yellow liquid, its descaling function is much higher than other descaling products, the main components include: organic acid, inorganic acid, corrosion inhibitor, scale inhibitor, penetrant And other ingredients are compounded. It can be applied to copper, brass, stainless steel and other metals and alloy materials with a corrosion inhibition rate of up to 99%.
(1) The descaling agent fully considers the specific conditions of the user. It is an organic acid cleaning agent that is organically compounded with cleaning agents, sterilizing algaecides, dispersing and penetrating agents, and high-efficiency corrosion inhibitors. It simplifies and facilitates the installation and operation of the cleaning site.
(2) High corrosion inhibition power, fast cleaning speed, etc., cleaning waste liquid treatment is simple and convenient, which is beneficial to the pre-film after cleaning.
(3) It can effectively suppress the galvanic corrosion of copper alloy-carbon steel composite parts in the pickling process of copper pipes; it has strong resistance to accelerated corrosion of Fe3+ and Cu2+.
(4) The main cleaning and descaling agent selected for the descaling agent is organic series, which is safe for equipment, thorough descaling and low corrosion rate; it is not corrosive and toxic to operators at all, and the operation is simple, safe and reliable; at the same time, this product is not Contains toxic and hazardous substances, which can be discharged after simple neutralization, which is safe and environmentally friendly. The product uses solid components, is safe and easy to use, has no harm to the human body, no corrosion to the equipment, and no impact on the environment.
(5) Reduce labor intensity, facilitate users' direct use and regular cleaning and maintenance of cooling tower coils, and save equipment maintenance expenses.
Guangdong Trlon Energy-saving Air Conditioning Equipment Co., Ltd.
Company Address： 1916A, Block A, David Donglong Business Building, Longhua, Longhua District, Shenzhen