Novel rotation evaporator

Abstract

The invention provides a novel rotation evaporator capable of guaranteeing equipment safety and eliminating the superheat degree of expansion air entering an upper tower. The novel rotation evaporator comprises a shell. The shell is provided with a nitrogen inlet, a liquid nitrogen outlet, an expansion air inlet and an air expansion air outlet. The shell is internally provided with an expansion air main cold plate. A plurality of nitrogen channels, a plurality of liquid oxygen channels and a plurality of expansion air channels are arranged on the expansion air main cold plate, and the expansion air channels are connected with the expansion air inlet and the expansion air outlet. The nitrogen channels are connected with the nitrogen inlet and the liquid nitrogen outlet. According to the novel rotation evaporator, deep cooling air separation is conducted, the main cold plate of the condensation evaporator is additionally provided with the expansion air channels, so that the expansion air passes through part of main cold channels, the supercooling degree of the expansion air is reduced, the effect of air separation of an evaporator with thermosyphon can be achieved, and the number of layers of tower plates of the upper tower is reduced. Meanwhile, the air separation with the thermosyphon is the same as the air separation without thermosyphon in safety.

Description

technical field [0001] The invention relates to an evaporator, in particular to a novel rotary evaporator. Background technique [0002] In the cryogenic air separation of the fourth-generation molecular sieve adsorption process, there are two processes, one is a heating siphon evaporator, and the other is a non-heating siphon evaporator. The reason for heating the siphon evaporator is that it can reduce the subcooling of the expanding air and reduce the number of upper column trays. And pressurized liquid oxygen self-circulation to improve the safety of the main cooling. Recently, it has been found that when the thermosiphon evaporator is used, due to the unreasonable structure, a dry evaporation area is formed in the thermosiphon, which can easily cause a micro-explosion of the thermosiphon evaporator, resulting in deformation of the cold box, parking, and even a major accident of the main cold explosion. Therefore, the current process is reducing the use of thermosiphon...

AI Technical Summary

Problems solved by technology

Recently, it has been found that when the thermosiphon evaporator is used, due to the unreasonable structure, a dry evaporation area is formed in the thermosiphon, which can easily cause a micro-explosion of the thermosiphon evaporator, resulting in deformation of the cold box, parking, and even a major accident of the main cold explosion.

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