In the pressure vessel equipment, after a long time of operation, the heat exchanger inevitably presents the problem of scale and corrosion. Corrosion: the cooling and chilled water of the heat exchanger is highly corrosive without treatment. If the ordinary steel sheet or iron nail is put into the water, rust will appear after a few days. The longer the storage time is, the more serious the corrosion will be. The inner wall of the equipment often causes the rust slag to fall off or even perforation due to corrosion. The falling rust slag will block the coil and reduce the heat exchange effect. At the same time, the service life of the equipment will be greatly shortened due to the existence of corrosion.

Scaling: inorganic salt dissolved in water crystallizes and precipitates in the pipeline, and scale is formed on the wall of heat exchange surface such as condenser, which leads to the decrease of heat exchange efficiency and refrigeration effect. If it is serious, it will decrease by 30%. At the same time, if the hard scale increases, the power consumption will increase, and if it is serious, it will increase by 35%. Biofouling is formed by soil, sediment and humus in water, plus bacteria, algae and other microorganisms and their components The biological slime formed by secretions will cause pipe blockage in serious cases, and the fouling and slime will affect the heat exchange efficiency, consume more power, cause high-pressure operation, and cause overpressure shutdown in serious cases. All these seriously affect the normal operation of the heat exchanger. Therefore, the problems of scale, corrosion, sludge, bacteria and algae in the heat exchanger system will directly lead to the weakening of heat exchange capacity, shortening of service life, reduction of operation reliability and improvement of energy consumption, which will lead to the increase of operation cost. In order to make the heat exchanger system run in the optimal state, it is necessary to carry out special chemical treatment for the cooling water and chilled water system of the heat exchanger: removing scale, rust, mud, sterilization and anti-corrosion treatment. The significance is to save energy and reduce the operation cost. In the heat transfer process of evaporator and condenser of heat exchanger, the fouling directly affects the heat transfer efficiency and the normal operation of the equipment. The operation results of heat exchanger indicate that the power consumption of the heat exchanger without cleaning will increase by 10-30% after a period of operation, prolong the service life, and reduce the depreciation cost of equipment.

In order to reduce the accident shutdown and improve the refrigeration effect. Cleaning can remove the sludge, make the pipeline smooth and the water clear. At the same time, descaling and antiscaling can improve the thermal efficiency of condenser and evaporator, so as to prevent the phenomenon of overpressure shutdown in high-pressure operation, improve the chilled water flow, improve the refrigeration effect, and make the system operate safely and efficiently. For users to save a lot of maintenance costs: untreated heat exchanger, there will be pipe blockage, scaling, corrosion, overpressure shutdown until the accident, such as heat exchanger due to corrosion leakage, solution pollution, you need to replace the copper pipe, replace the solution, maintenance of the host, the general maintenance costs of 20000-50000 yuan. After disposal, it can not only reduce the maintenance cost, but also extend the service life of the equipment, and reduce tens of millions of losses for the owners. In order to make the heat exchanger system run in the optimal state, it is necessary to carry out special chemical treatment for the water system of the heat exchanger system: removing scale, rust, mud, sterilization and anti-corrosion treatment; chemical cleaning and sterilization: adding chemical cleaning agent and bactericide, cleaning and dispersing the floating rust, scale, oil, bacteria and algae in the system, reducing them to clean metal Appearance; daily maintenance: add corrosion and scale inhibitor to prevent metal rusting and calcium and magnesium ion crystallization and precipitation.

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