Containment built-in efficient heat exchanger adopting self-flowing type air blowing system

Abstract

The invention provides a containment built-in efficient heat exchanger adopting a self-flowing type air blowing system. The containment built-in efficient heat exchanger mainly comprises a heat exchanger inlet header, heat exchange tubes, a heat exchanger outlet header and the self-flowing type air blowing system. The self-flowing type air blowing system comprises a water conveying structure, a water bucket type water wheel, an air blowing structure, a drainage pipe and a gear steering box. The self-flowing type air blowing system can convert potential energy of water flow of steam condensation into jet flow kinetic energy to drive the air blowing impeller to rotate, so that a non-condensable gas film near the heat exchange pipe is blown away, and the steam can be better condensed and exchange heat on the outer surface of the heat exchange pipe. The heat in the containment can be efficiently taken away when a crevasse accident occurs in the containment, a non-condensable gas film can be effectively thinned by utilizing the self-flow blowing system, the contact between steam and a pipe bundle is enhanced, efficient heat transfer is realized, efficient temperature and pressure reduction in the containment under the accident condition can be ensured, and the safety of the containment is ensured. The safety of the containment is enhanced; and a feasible scheme is provided for reducing the construction cost of the containment.

Description

technical field [0001] The invention relates to high-efficiency heat exchange equipment for a passive containment cooling system, and specifically refers to a high-efficiency heat exchanger built in a containment using a self-flow blowing system. Background technique [0002] The 21st century is an important stage of human development, and it is also a stage of shortage of conventional energy. Because of its clean and efficient characteristics, nuclear energy has attracted people's attention since its discovery. With the continuous development and maturity of nuclear energy technology, nuclear energy has gradually become a new major energy source. Its high energy density, clean and efficient characteristics make it more and more widely used. [0003] While nuclear energy brings clean and efficient energy to mankind, it also brings many risks. With the development of nuclear power technology, more and more attention has been paid to the safety of nuclear power plants. There...

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Problems solved by technology

[0006] During the development of the accident, the PCCS will gradually dissipate the heat in the containment during the long-term operation. During the operation of the PCCS, a large amount of steam will condense on the surface of the heat exchanger inside the containment At the same time, a large amount of non-condensable gas will accumulate on the outer surface of the heat exchanger inside the containment, so that a gas film will be formed on the outer surface of each heat exchange tube to inhibit steam condensation and heat transfer. The published patents have not formed an effective solution to this problem

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