Self-driven drainage type containment built-in efficient heat exchanger

Abstract

The invention provides a self-driven drainage type containment built-in efficient heat exchanger which adopts a spiral pipe enhanced heat exchange pipe, and a plurality of flow gathering plates are arranged on the periphery of the spiral pipe enhanced heat exchange pipe. One end of a containment built-in heat exchanger inlet pipeline is communicated with the outlet pipeline at the bottom of a containment external heat exchange water tank, and the other end extends into a containment and is communicated with a containment built-in heat exchanger inlet header. One end of the containment built-in heat exchanger outlet pipeline is communicated with the bottom inlet pipeline of the containment external heat exchange water tank, and the other end of the containment built-in heat exchanger outlet pipeline extends into the containment and is communicated with the containment built-in heat exchanger outlet header to form a passive containment cooling system. Heat in the containment can be efficiently taken away when a crevasse accident occurs in the containment, passive air natural circulation can be increased through the funnel-shaped structure formed by splicing the multiple flow gathering plates, efficient heat transfer is achieved, potential hazards caused by hydrogen blast to the containment and the heat exchanger can be restrained, and the integrity of the containment is guaranteed.

Description

technical field [0001] The invention relates to high-efficiency heat exchange equipment for a passive containment cooling system, in particular to a self-driven drainage type high-efficiency heat exchanger built into a containment. Background technique [0002] Nuclear energy has become a new major energy source since the 20th century. With the continuous development and maturity of nuclear energy technology, the application range of nuclear energy is also becoming more and more extensive. From nuclear power plants on land in the early days, it has expanded to marine, marine and aerospace industries. [0003] Among them, nuclear safety has always been the focus of researchers, and it is also the prerequisite for the wide application of nuclear energy. Therefore, in conventional nuclear power plants, in order to effectively guarantee the safety of nuclear power plants and curb the severity of accidents, a passive containment cooling system has been introduced into the third-...

AI Technical Summary

Problems solved by technology

[0007] During the development of the accident, the long-term operation of the PCCS will gradually dissipate the heat in the containment. During the operation of the PCCS, a large amount of steam will condense on the surface of the heat exchanger inside the containment, and a large amount of non-condensable steam will accumulate on the outer surface of the heat exchanger inside the containment. Inert gas, so that the outer surface of each heat exchange tube will form a gas film to inhibit steam condensation and heat transfer, the published patents have not formed an effective solution to this problem

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