Liquid oxygen system

Abstract

The invention discloses a liquid oxygen system, comprising a liquid oxygen storage tank, a liquid oxygen pump and an air shower-type evaporator, which are sequentially connected, The liquid oxygen system also comprises an air flue and a fan for extracting hot air; the fan blows the hot air to the outer surface of the air shower-type evaporator through the air flue. The fan for extracting the hot air is added, so that full heat exchange on the hot air and the air shower-type evaporator is achieved; the conducting and heat-transfer temperature difference at the surface of a radiator fin of the air shower-type evaporator is increased, so that the temperature and blast capacity of the hot air blown to the air shower-type evaporator are appropriate; the heat exchange demands of the air shower-type evaporator are achieved; the situations that the air shower-type evaporator bears a large temperature difference due to the fact that the steam is directly utilized to heat, and the air shower-type evaporator is damaged because of direct striking of thick ice are avoided; furthermore, by adopting the liquid oxygen system provided by the invention, the air flow velocity of heat exchange of the air shower-type evaporator is greatly increased under the common effect of the fan and the air flue; the outer wall of the air shower-type evaporator is prevented from being frozen; normal operation of the system is ensured.

Description

technical field [0001] The invention relates to the technical field of chemical industry, and more specifically, relates to a liquid oxygen system. Background technique [0002] Liquid oxygen is liquid oxygen, which is a light blue liquid. The main physical properties are: the density under normal pressure is 1.141g / cm 3 , the freezing point is 50.5K, the boiling point is 90.188K, and the total expansion ratio is as high as 800:1. It is widely used in industrial production and military fields. Due to the limitations of physical and chemical properties, liquid oxygen is generally stored in liquid oxygen storage tanks. Before entering the oxygen filling system, it needs to be pressurized to about 15MPa by a liquid oxygen pump, and then enters the air bath vaporizer and The heat exchange of the outside air makes the liquid oxygen change from a low-temperature liquid state of -180°C to a gaseous oxygen close to normal temperature, and then enters the gas-oxygen filling system. ...

AI Technical Summary

Problems solved by technology

However, the use of steam to directly melt the ice on the surface of the air-bath vaporizer will result in a large temperature difference between the inside and outside of the air-bath vaporizer, which is about 350°C, so that the air-bath vaporizer cannot bear the huge equipment damaged by stress

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