Central pipe film-falling drying pot reboiling device for vacuum water distilling and generating oxygen-18

Abstract

The center tube falling film dry still reboiler for water distillation by pressure reduction to produce oxygen-18, relates to the field of heat exchange equipment. The invention discloses a center tube falling film dry still reboiler, which is composed of an upper body, a lower body and an under sealing head. The upper body comprises a stripper loop, a round baffle and a liquid collecting weir, which is provided with a liquid outflow pipe. The lower body is a tubular heatexchanger, of which the lower extreme floats and the center has gas flow main tube, wherein the tube pass is composed of tube plate, heating tube, center tube, floating tube plate, and air-collecting chamber formed by the floating tube plate and the floating sealing head, and so on. The falling film blast deflector hangs in the heating tube from the upper port to form a liquid seal with a certain height at the upper in the heating tube as well as to make the liquid flowing into the heating tube flow to the tube well in falling film. So the invention can effectively reduce investment outlay, operating expenses and cost of production.

Description

technical field [0001] The invention relates to a reboiler used in the technology of producing oxygen-18 water by rectification of reduced pressure water, and belongs to the field of chemical heat exchange equipment. Background technique [0002] The reboilers used in the existing vacuum water rectification technology to produce oxygen-18 are all wet kettle reboilers with liquid retention. With the retention of liquid, there is also a liquid level. In the process of continuous operation It is necessary to control the liquid level and the flow of the heating steam, which will increase the investment cost and operating cost. Not only that, but the retention of the reboiler will directly affect the isotope enrichment equilibrium time. The higher the retention of the reboiler The longer the large isotope enrichment equilibration time, the higher the operating cost during isotope enrichment equilibration. Contents of the invention [0003] The purpose of the present invention ...

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Problems solved by technology

[0002] The reboilers used in the existing vacuum water rectification technology to produce oxygen-18 are all wet kettle reboilers with liquid retention. With the retention of liquid, there is also a liquid level. In the process of continuous operation It is necessary to control the liquid level and the flow of the heating steam, which will increase the investment cost and operating cost. Not only that, but the retention of the reboiler will directly affect the isotope enrichment equilibrium time. The higher the retention of the reboiler The longer the large isotope enrichment equilibration time, the higher the operating cost during isotope enrichment equilibration

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