Draught fan for heating reactor main container

Abstract

The invention relates to a draught fan for heating a reactor main container. The draught fan comprises a draught fan body, a gearbox, a coupling, a three-phase asynchronous motor, a thin oil station,a sealing device and a frequency speed control system. By means of the design of an inlet installation angle and an outlet installation angle of impeller blades, at least 75% mechanical energy can beconverted into heat energy, and the heating power not lower than 650 kW can be provided; and by means of the design of a volute cooling water loop and a heat insolation baffle, the working temperatureat the shaft sealing part is lowered, and the reliability of a sealing device is ensured. The draught fan solves the problem of simultaneous stable heating of the reactor main container and reactor inner components and can be applied and popularized to preheating of large container type equipment with complex inner structures.

Description

technical field [0001] The invention belongs to the design of a fan, in particular to a fan used for heating a reactor main vessel. Background technique [0002] The main container of the sodium-cooled fast reactor needs to be preheated in advance before filling with sodium, so as to reduce the thermal shock caused by the liquid metal sodium entering the main container to the inner wall of the main container and the internal components of the reactor. At present, the commonly used heating technology generally converts electrical energy into thermal energy, and then heats objects through contact heat conduction. This heating method is not suitable for large-scale container equipment that is not accessible inside and has a complex internal structure, and cannot meet the requirements for uniform temperature rise of internal and external structures, such as the main container of a reactor. The reactor main vessel includes the reactor body, reactor internals and protective vesse...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a fan for heating the main reactor vessel, which not only needs to meet the gas heating and ventilation cycle of the main vessel, but also meets the function of temperature rise and heat preservation, so as to solve the problem of simultaneous heating of the main reactor vessel and reactor internals

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