A large-coil steam generator device with water supply at the upper end

Abstract

The invention provides a large-coiler steam generator device with water being fed at the upper end. The large-coiler steam generator device with the water being fed at the upper end comprises a cylinder, a spiral heat exchange pipe and a vertical straight pipe section. The upper end of the cylinder is fixedly connected with an upper end closure, and the lower end of the cylinder is fixedly connected with a lower end closure. An inner shell is fixedly connected to the inner side wall of the cylinder. A return annular cavity is formed by the inner shell and the inner side of the cylinder. The upper portion of the side wall of the cylinder is provided with a water inlet section. The top of the upper end closure is provided with a steam outlet section. The spiral heat exchange pipe is of a large coiler structure. The upper end of the spiral heat exchange tube is connected with the steam outlet section. The lower end of the spiral heat exchange pipe is connected with the lower end of the vertical straight pipe section. The vertical straight pipe section is located at the center of the spiral heat exchange pipe. The upper end of the vertical straight pipe section is connected with the water inlet section. According to the large-coiler steam generator device with the water being fed at the upper end, the structure is simple, and the heat exchange efficiency is high; the middle space of the large-coiler steam generator device is fully utilized, the length of a preheating portion is increased, and the height of the cylinder is reduced; and in addition, the water inflow amount is controlled through a partition plate, power adjustment of the large-coiler steam generator device with the water being fed at the upper end can be achieved, and operation and maintenance are convenient.

Description

technical field [0001] The invention belongs to the technical field of nuclear equipment, in particular to a steam generator. Background technique [0002] There are basically two schemes for the layout of the main water supply pipeline of the reactor steam generator: (1) the scheme of lower water supply. When the steam generator is overhauled, when the water supply port is located at the lower end, it will be closer to the core, which is not conducive to overhaul and will pose a threat to the health of personnel. (2) The upper water supply scheme of the middle coil with the water supply header. In this solution, when the steam generator fails and the heat transfer tubes are overhauled, two tubes need to be blocked at the feedwater header of the lower head for each heat transfer tube overhauled. The maintenance operation is complicated, and the heat exchange units of the middle coil structure are mutually The gap between them is large, the space utilization rate is not hig...

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Problems solved by technology

[0003] In view of this, the present invention aims to propose a large-coil steam generator device with water supply at the upper end, so as to solve the problems of large equipment volume, low space utilization rate and cumbersome maintenance process in the prior art

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