Underground nuclear power station cooling vertical shaft

Abstract

The invention discloses an underground nuclear power station cooling vertical shaft. The underground nuclear power station cooling vertical shaft comprises a round-table-shaped vertical shaft body which is located in the mountain and provided with an opening in the upper portion, a water collection pool is arranged at the bottom of the vertical shaft body, and is provided with a cooling water outlet pipe and a blow off pipe, an air supply system for conveying cold air is arranged below an inner cavity of the vertical shaft body, a hot water distribution system connected with a condenser of a turbogenerator is arranged above the air supply system, input hot water is atomized and sprayed through the hot water distribution system, a cooling ventilation gallery communicated with the outer portion of the earth surface is arranged in the middle of the inner cavity of the vertical shaft body, and a mist eliminator is arranged on the upper portion of the inner cavity of the vertical shaft body. A vertical shaft structure is used for replacing a cooling tower structure, on the basis of the mist spraying cooling principle, hot water entering the cooling vertical shaft forms atomized micro particles, the hot water evaporation and heat absorbing process is enhanced, and through the air supply system, spiral cyclone is formed in the cooling vertical shaft, and heat exchange is enhanced. Meanwhile, arrangement of trickling fillers is abandoned, the cooling vertical shaft is structurally reduced greatly, and the construction and running cost is effectively reduced.

Description

technical field [0001] The invention relates to nuclear power technology, in particular to an underground nuclear power plant cooling shaft. Background technique [0002] Nuclear power generation is to convert nuclear energy into internal energy of water vapor, and then drive a steam turbine to generate electricity through steam. In order to improve the efficiency of power generation, nearly two-thirds of the energy will be dissipated to the environment in the form of exhaust steam cooling during the process of steam driving the steam turbine to generate electricity. In order to reduce the impact of thermal pollution on the environment, the layout of underground nuclear power plants is as follows: figure 1 As shown, the nuclear island 102 is arranged inside the mountain 101 , and the steam turbine plant 103 is arranged on the ground platform not far from the nuclear island 102 . The nuclear island 102 uses the rock mass as a physical barrier, and its safety is higher. The...

AI Technical Summary

Problems solved by technology

In terms of wind resistance and material savings, natural draft cooling towers are usually designed as hyperboloids, which increases construction difficulties and engineering costs

At the same time, natural draft cooling towers occupy a large area, especially when multi-reactors are arranged, which greatly wastes the land resources in the site area of ​​the nuclear power plant. Three reactors can be arranged on the ground, which brings huge economic benefits

In addition, the existing cooling tower adopts water-sprinkling packing technology, hot water flows through the water-sprinkling packing to form a liquid film to increase the heat exchange with the air. This technology needs to raise the circulating water above the arrangement height of the water-sprinkling packing, Due to the huge amount of cooling water circulation in nuclear power plants, the cost of upgrading the circulating water alone amounts to tens of millions of yuan each year

Images