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Cleaning and maintenance of heat exchanger

Release time: 2017-02-11      Read: 462            

The heat exchanger after long time operation, the inevitable emergence of the corrosion scale, corrosion, heat exchanger cooling and freezing water without treatment is extremely corrosive, such as ordinary steel sheets or nails in the water, after a few days there will be rust, placed the longer, the more serious corrosion。 The inner wall of the equipment often causes the rust to fall off, even the perforation, and the rust dregs will block the coil, so that the heat transfer effect is decreased。 Scaling: inorganic crystal precipitation in the pipeline is dissolved in water, the formation of scale heat transfer surface in condenser tube wall, resulting in heat exchange efficiency, cooling effect is reduced, serious decline of 30%。 At the same time, the scale increases, the power consumption increases, and increases by 35%。 Biological slime: because the water of soil, sediment, humic matter formed with dirt, bacteria, algae and other microorganisms and their secretions to form biological slime, resulting in serious pipeline blockage; and the dirt and mud will affect the heat exchange efficiency, more power consumption, resulting in high pressure operation, serious caused by overpressure shutdown。 All of these seriously affect the normal operation of the heat exchanger。 So the heat exchanger system scale, rust, mud, bacteria and algae problems will directly lead to the heat transfer ability is abate, shorten the service life and reliability, reduce the energy consumption due to increased operating costs increase。 In order to make the heat exchanger system in optimum operating condition, it must be on the heat exchanger cooling water and chilled water system for chemical drugs special treatment: remove scale, rust, mud, sterilization and anti corrosion, meaning lies in: save energy and reduce operating costs。 In the evaporator and condenser heat transfer process of heat exchanger fouling, which directly affects the normal operation of the equipment and the heat transfer efficiency of heat exchanger, the operation results show that without heat exchanger cleaning after a period of operation of electricity consumption will increase 10-30% to prolong the service life, reduce the equipment depreciation fee。 Reduce downtime and improve cooling performance。 Cleaning sludge can be removed, so that the pipeline smooth, clear water。 At the same time, scale removal and prevention, improve the thermal efficiency of the condenser and the evaporator, thereby avoiding the pressure overpressure shutdown phenomenon, improve the chilled water flow, improve the cooling effect, make the system safe and efficient operation。 A large number of maintenance cost savings for the user: without heat exchanger processing, will lead to pipe blockage, fouling, corrosion, overpressure down until the accident, such as the heat exchanger due to corrosion and leakage, solution pollution, need to replace the copper replacement solution, repair the host, generally required maintenance costs 2-5 million。 But after treatment, can reduce maintenance costs, and can prolong the service life of the equipment, but also for the owners to reduce the loss of hundreds of thousands of millions。

In order to make the heat exchanger system in optimum operating condition, it must be water system on the heat exchanger system for chemical drugs special treatment: remove scale, rust, mud, sterilization and anti corrosion treatment:

1、Chemical cleaning and sterilization: adding chemical cleaning agent and bactericide, the system of rust, dirt, oil, bacteria and algae cleaning dispersing discharged, the l surface cleaning reduction;

2、2、Daily maintenance: addition of corrosion inhibitor, avoid rust, prevent the crystallization of calcium and magnesium ions。





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