Built-in multi-purpose pipe-diameter-variable spiral heat exchanger of nuclear reactor

Abstract

The invention provides a built-in multi-purpose pipe-diameter-variable spiral heat exchanger of a nuclear reactor. The heat exchanger comprises multiple sets of heat exchange pipes, each heat exchangepipe set is composed of a plurality of spiral pipes winding the same spiral rotating shaft, all the heat exchange pipes have the same screw pitch and the same number of spiral coils, the circular centers of the spiral starting end faces of the spiral pipes of each set are located on the same plane, each spiral heat exchange pipe set is provided with the same water inlet and the same steam outlet,and four spiral heat exchange pipe design schemes including the staggered and pipe-diameter increasing scheme, the staggered and pipe-diameter decreasing scheme, the staggered and pipe-diameter increasing at first and then decreasing scheme and the staggered and pipe-diameter decreasing at first and then increasing scheme can be divided for the spiral heat exchanger from the large spiral radius Rof the heat exchanger to the small spiral radius r according to the arrangement mode of the heat exchange pipes and the velocity distribution of a nuclear reactor coolant. In this way, the pipe-diameter-variable spiral heat exchange pipes can efficiently convert the reactor power of the nuclear reaction into steam internal energy, a steam turbine is pushed to do work, and the heat exchange efficiency of the built-in spiral heat exchanger of the nuclear reactor and the flexibility of on-site spiral winding of the heat exchange pipes are improved.

Description

technical field [0001] The invention relates to the technical field of nuclear reactor heat exchangers, in particular to a nuclear reactor built-in multi-purpose variable-diameter spiral heat exchanger. Background technique [0002] Human beings have been seeking clean and efficient energy security, and have been using nuclear power for many years. Nuclear power systems also play an indispensable role in the energy structure at home and abroad. At present, the size of the nuclear reactors of very mature nuclear power plants is large It is not conducive to the application of nuclear reactors in island power supply, mobile nuclear power platforms, space nuclear power and ship power plants, etc.; and the nuclear reactors and steam generators are connected through the pipelines of the first circuit pressure boundary, and the valves and joints on the pipelines There will be a risk of coolant leakage, and at the same time, there is also a risk of pipeline breaches in the pipeline ...

AI Technical Summary

Problems solved by technology

[0002] Human beings have been seeking clean and efficient energy security, and have been using nuclear power for many years. Nuclear power systems also play an indispensable role in the energy structure at home and abroad. At present, the size of the nuclear reactors of very mature nuclear power plants is large It is not conducive to the application of nuclear reactors in island power supply, mobile nuclear power platforms, space nuclear power and ship power stations, etc.; and the nuclear reactors and steam generators are connected through the pipelines of the first circuit pressure boundary, and the valves and joints on the pipelines There will be a risk of coolant leakage, and at the same time, there is also a risk of pipeline breaches in the pipelines of the first pressure boundary. How to cancel the pipeline system of the first circuit pressure boundary has long been presented to nuclear reactor engineers at home and abroad. At this stage, the world All countries are working hard to develop miniaturized nuclear reactors and micro-nuclear reactors with smaller volume and higher power density. The main feature is that the steam generator, main pump, control rod drive mechanism and other main equipment are directly combined with the pressure vessel into an integrated structure. (ie: nuclear reactor), is one of the key development directions of future nuclear reactors

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