Defrost method and defrost device applied to outdoor suction port of fan in severe cold area

Abstract

The invention discloses a defrosting method applied to an outdoor air suction port of a fan in a severe cold area, comprising: detecting the actual temperature T1 of the air suction port; when the actual temperature T1 is less than or equal to a preset temperature T, detecting the air suction resistance of the air duct of the fan And the air intake volume; when the detection value of the suction resistance increases continuously, and at the same time the detection value of the air intake volume decreases continuously, start timing, and continue to detect the suction resistance and air intake volume of the fan duct, and the duration of continuous detection is t; if the suction resistance If the detected value, the detected value of the air intake, or the change of the suction resistance and the air intake meet the defrosting requirement, the defrosting mechanism is controlled to perform a defrosting action. Also disclosed is a defrosting device, comprising a fan, a temperature detector, a wind suction resistance detector, an air intake detector, a defrosting mechanism, a timer and a controller. The invention realizes effective and intelligent defrosting, achieves a good defrosting effect, and ensures reliable operation of fans, boiler equipment and generator sets.

Description

technical field [0001] The invention relates to the technical field of defrosting, in particular to a defrosting method and a defrosting device applied to an outdoor air suction port of a fan in severe cold regions. Background technique [0002] The wind system of a thermal power plant is mainly used to transport and dry the fuel required for boiler combustion, supply a large amount of air required for fuel combustion, and overcome the air required for fuel combustion in air preheaters, pulverized coal equipment, combustion equipment and wind. System resistance in equipment such as roads. Therefore, the focus of wind system design is to select fans with appropriate capacity, optimize the flow field at the inlet and outlet of fans, reduce unfavorable conditions for fan operation and performance efficiency, maintain reasonable medium flow and velocity, and adopt reasonable smoke duct layout to Reduce system resistance. However, in severe cold areas (such as Xinjiang), due to...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a defrosting method and defrosting device applied to the outdoor air suction port of the fan in severe cold areas, so as to solve the problem of frosting on the fan port of the wind system of the thermal power plant

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