Hydroelectric power plants, that is, hydroelectric power plants, are factories that use water resources to generate electricity; compared to power plants that burn fossil fuels such as coal, oil, and natural gas to generate electricity, they have less impact on the environment and have a power generation efficiency of up to 90%. %, the cost of power generation is low, the power generation starts quickly, the power generation can be completed within a few minutes, the adjustment is easy, and the cost of unit output power is the lowest. For this reason, my country is currently vigorously developing hydropower resources, and the construction of major hydropower projects is also fast Under development.

It is understood that the problem of moisture and condensation has been a problem that has plagued major hydroelectric power plants for many years; due to the influence of topography and other factors, many large hydropower stations planned, under construction, and already built have chosen the form of underground powerhouses. Since hydropower stations are generally deep-buried underground powerhouses, they are not exposed to sunlight, and the surface of the enclosure structure has large moisture dissipation, and the relative air humidity is often large. Especially for the turbine layer and volute layer of hydropower stations, the relative humidity can even reach more than 90%, and condensation often occurs in the powerhouse.

The damp underground space will not only affect the service life of electromechanical equipment, but also adversely affect the health of workers. When some large-scale hydro-generator equipment is in operation, water droplets are prone to be generated on the surface of the main shaft of the hydro-generator. The water droplets will enter the water-conducting bearing along the oil basin cover and bring hidden dangers to the safe operation of the generator set. There are many piping and electrical equipment in the pump room of the Daqing water pump. Condensation occurs on the surface of the piping and electrical equipment. After the formation of water droplets, the damage rate of the sealing materials, metal parts and electrical components of the pump is greatly accelerated, which will cause safety to the stable operation of the pump. Hidden dangers.

From April to October each year, the main building of most hydroelectric power plants is humid and dew condensation is very serious. Condensation water flows out on the ground, wall, and tube outer surface, causing the end of the generator stator bar to rust and the electrical supply room Misoperation of components affects the normal production of the system. This phenomenon is common in hydroelectric power plants. In the past, in order to solve such problems in some large hydroelectric power plants, most of the methods used at home and abroad to wrap the insulation material layer in the supply and drainage pipes, but because the temperature difference between the air and the cold object is too large, and the water pipe and the coating are in contact for a long time. , Which eventually causes the surface temperature of the coating to be close to the temperature of the cold object (cold water), and condensation still exists;

Another method is to use the inner layer to wrap the thermal insulation material, and the outer layer to wrap the plexiglass steel or aluminum alloy plate, so that although the external surface condensation is reduced, but because of how the sealing is done, the cold object surface and the thermal insulation layer cannot be completely discharged. Therefore, after a period of time, when the insulation layer is opened, most of the surface of the water pipe has been rusted, and the condensation problem has turned into a rust problem. Therefore, it can be seen from the practice of major power plants. Out: The method of using coating or thermal insulation layer is unsatisfactory and cannot solve the fundamental problem.

In response to this situation, after continuous exploration and exploration by technical personnel in the hydropower industry, it is found that the most simple and effective way to solve the problem of moisture and condensation is to use a dehumidifier. Dehumidifier is currently the most professional type of moisture-proof dehumidification equipment. It can quickly extract excess water in the air and control the moisture content in the air within an ideal range. At the same time, it can perform all-round indirection on various items or equipment. Dehumidification, leaving no dead ends.