Dismounting and mounting device for intermediate heat exchanger

Abstract

The invention relates to a dismounting and mounting device for an intermediate heat exchanger. The dismounting and mounting device comprises a cylindrical main body which is used for covering the outer side of the intermediate heat exchanger from the upper portion and sealing the intermediate heat exchanger in the cylindrical main body when the cylindrical main body is in butt joint with an intermediate heat exchanger supporting cylinder; a lifting part arranged at the top of the inner side of the cylindrical main body and provided with a lifting mechanism capable of moving up and down in the cylindrical main body so as to drive the intermediate heat exchanger to lift; a gas replacement part arranged on the cylindrical main body and used for discharging gas in the cylindrical main body or introducing gas into the cylindrical main body; and a closing part which is arranged at the bottom of the cylindrical main body and can selectively open or close the cylindrical main body from the bottom. The middle heat exchanger is driven by the lifting part to ascend and descend so as to be disassembled and assembled, the middle heat exchanger is provided with a closed disassembling and assembling space through the cylindrical main body and the closing part, gas in the disassembling and assembling space is replaced by the gas replacement part, and the stability of the middle heat exchanger in the disassembling and assembling device is guaranteed.

Description

technical field [0001] The present disclosure relates to the technical field of reactors, and in particular, to a disassembly and assembly device for an intermediate heat exchanger. Background technique [0002] The intermediate heat exchanger is arranged in the main reactor vessel, wherein the tube bundle area is immersed in a sodium pool with radioactivity in a circuit, and the part from the mixed flow chamber to the mating surface of the support table is in the radioactive sodium gas environment. The weight of a single intermediate heat exchanger can reach nearly 100t, the height is more than 15m, and the diameter is 2-3m. When the equipment is taken out, the reactor is in a shutdown state. However, due to the need to maintain the liquid state of the coolant, the temperature inside the reactor is still as high as about 250℃. The temperature of the heat exchanger equipment itself is basically the same. If the intermediate heat exchanger is damaged during operation or reach...

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Problems solved by technology

The weight of a single intermediate heat exchanger can reach nearly 100t, the height exceeds 15m, and the diameter is 2-3m. The temperature of the heat exchanger itself is basically the same. If the intermediate heat exchanger is damaged during operation or reaches the rated life, it needs to be taken out of the reactor container. Since the reactor has been running for a long time, the intermediate heat exchanger itself also has a considerable dose of radioactivity. As a key equipment, the heat exchanger needs to be disassembled. Therefore, it is urgent to develop a special device for disassembling the intermediate heat exchanger.

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