Automatic deicing control system of cooling tower fan
A control system, tower fan technology, applied in the direction of lighting and heating equipment, heat exchange equipment, etc., can solve the problems of affecting the filling efficiency, affecting the cooling effect, affecting the cooling effect of the tower, etc., to solve serious icing, save manpower and material resources, Effective deicing effect
Inactive Publication Date: 2012-05-02
WISDRI ENG & RES INC LTD
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Problems solved by technology
In winter, severe ice builds up on the louvers of the air inlet of the cooling tower, making the entire louver form an ice curtain, which almost closes the air inlet and outlet, resulting in a decrease in the area of the air inlet and outlet, and a decrease in the amount of air in and out, which affects the cooling effect of the tower. In addition, the ice curtain It may be thrown out during the operation of the motor, and there are serious safety hazards
In order to ensure the normal operation and cooling effect of the cooling tower, the usual method is to let the operator dig ice, but it may be damaged together with the shutters during the ice digging process, resulting in a great waste of manpower and material resources
At the coldest time, it will even freeze the filler, which will affect the efficiency of the filler and the cooling effect of the tower after the filler freezes.
What's more, the increased ice load after freezing may cause structural deformation and collapse of the cooling tower
At present, the common anti-icing methods for cooling towers in the market include installing anti-freezing pipes, spray pipes, etc., but these all need to increase the construction, operation and maintenance costs of cooling towers
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[0033] The purpose of using a cooling tower is to reduce the temperature of the water in the tower. During normal use, the air with higher temperature in the tower is extracted through the forward rotation of the fan, and the heat in the air is taken away through contact heat transfer and evaporation heat dissipation, and the water temperature is also lowered accordingly. And this heat is also the source of the heat required by our deicing system. When the fan reverses, the high-temperature air in the tower is not directly sucked away, but is compressed by the wind and spreads around, and the hot air will be discharged to the tower through the louvers. In addition, it is similar to using a hair dryer to blow the icicles in the tower, so as to achieve a good deicing effect and remove the ice curtain generated in the cooling tower. The automatic deicing control system uses a double-speed motor with an electrical control circuit with double-speed and reverse functions, and throug...
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The invention provides an automatic deicing control system of a cooling tower fan, which comprises a double-speed motor M, an MCC control cabinet and a PLC. A three-phase power sources is connected to the double-speed motor M, a power circuit of the double-speed motor M is also connected with the MCC control cabinet through a current inductor, the MCC control cabinet is connected with a spot operation box, and the whole control system is also connected with the PLC. Through the system, the cooling tower can be automatically deiced under a cold climate with low operation cost and maintenance cost.
Description
technical field [0001] The invention relates to an automatic deicing system for a fan of a cooling tower in a cold area. Background technique [0002] In the iron and steel metallurgy industry, the cooling tower is an indispensable heat exchange equipment in the circulating water treatment system. However, in cold regions, especially in winter, the fan of the cooling tower freezes seriously before operation, which brings many difficulties to safe production and operation and maintenance. In the cold regions of our country, the local freezing period can reach more than 5 months every year, and the lowest temperature can reach minus 40°C. In winter, severe ice builds up on the louvers of the air inlet of the cooling tower, making the entire louver form an ice curtain, which almost closes the air inlet and outlet, resulting in a decrease in the area of the air inlet and outlet, and a decrease in the amount of air in and out, which affects the cooling effect of the tower. In ...
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IPC IPC(8): F28F27/00
Inventor 陈红明宋嵩
Owner WISDRI ENG & RES INC LTD