SU1754999A1 - Method of cleaning high-vacuum multilayer heat insulation - Google Patents

Abstract

Use: in the field of cryogenic technology. The invention: allows to increase the efficiency of the device for discharge of vapors of a cryogenic liquid poo; The installation between the inner and outer vessels is a vortex tube, the cold end of which is connected to the tubular heat exchanger placed in the gas cavity of the inner vessel, and the vapor supply of the cryogenic liquid to the vortex tube has a pneumatic valve. 1 il.

Description

The invention relates to a cryogenic technique, namely, to a cutout for storing cryogenic products and liquefied gases,. .. (gh,

Known container for; storing a liquid containing a discharge device with a vent tube having two branches, with the help of a container to which the container is connected to the atmosphere through the vent holes. - The disadvantage of such a device is the great structural complexity of the container. J-,. ., .-

Such a storage tank for cryogenic liquids is also known, which includes an outer casing, thermal insulation and an inner vessel, on the inner surface of which an additional layer of thermal insulation is placed in the upper part, and the inner vessel itself is made of high heat conductive material1.

However, making an inner vessel of a material with high thermal conductivity leads to an increase in heat fluxes to the cryogenic product due to a decrease in the overall thermal resistance of the shells and insulation of the lower part of the vessel, which

does not provide sufficient time for drainage free storage of cryogenic liquid. i,% l -, The closest to the essence (prototype) of the proposed is a cryogenic liquid storage tank containing a device for cryogenic liquid discharge, including a tubular heat exchanger placed under the inner vessel, the interspace space of which is communicated with the inner cavity of the vessel, A single pipe for collecting the liquid is provided with a check valve and a heat gas supply pipe installed in front of the heat exchanger. However, such a solution of a device for vapor discharge in a cryogenic liquid has low efficiency due to the flow of an x-ray liquid cryogenic product from the tank during operation of the device and the supply of warm gas from an external source.

The purpose of the invention is to increase the efficiency of the device for the discharge of vapor of a cryogenic liquid.

The goal is achieved by the fact that in a storage tank for cryogenic liquids

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A vessel containing an outer and an inner vessel with a device for dumping vapors of a cryogenic fluid, connected to a tubular heat exchanger and located in the interwall of the tank, a device for vapor discharge containing a vortex tube, the inlet of which is connected to the vapor cavity of the inner vessel through a pneumatic valve, and the cold end - with a heat exchanger installed in the steam cavity of the inner vessel. „

This device does not require the consumption of stored cryogenic product from the tank and the supply of warm gas from an external source. The gas cavity is cooled by cold gas, obtained by the effect of a vortex tube, through which a pair of cryogenic liquid is discharged into the drainage.

Storage tanks for cryogenic liquids are known. Vortex tubes with tubular heat exchangers are also known. However, the use of a vortex tube as a device for discharge of vapors of a cryogenic liquid, the inlet of which communicates with the vapor cavity of the internal vessel through pneumatic valves, and the cold end with a heat exchanger installed in the vapor cavity of the internal vessel, does not require stored product and supply of thermal gas during operation. from an external source and, therefore, allows to find out the efficiency of the device.

The drawing shows the proposed storage tank for cryogenic liquid.

The tank consists of the outer 1 and inner 2 vessels, between which a vortex tube 3 is installed, the cold branch of which is connected to a tubular heat exchanger 4. The pipe supplying the vapor of the cryogenic liquid to the viral tube is equipped with a pneumatic valve 5. + -

The device in the tank filled with cryogenic liquid works as follows.

When the pressure in the gas cavity increases to the limit, equal to the pressure of the start of the gas release, the pneumatic valve 5 and the cryogenic liquid nurses open.

enter the vortex tube, where the flow is divided due to the effect of the vortex tube into a cold and hot one. The hot stream is discharged into the drain, and the cold stream enters the tubular

heat exchanger 4. passes through it, cooling the gas cavity, and is discharged into the drain. After the pressure in the gas cavity decreases to the established storage value, the pneumatic valve 5 closes and

the cryogenic liquid vapor discharge stops.

Thus, the device for discharging vapors of a cryogenic liquid in the form of a vortex tube located in

the interstitial cavity of the tank, the inlet of which is in communication with the steam cavity of the internal vessel through the pneumatic valve, and the cold end with the heat exchanger installed in the steam cavity of the internal

This allows for increased efficiency, since it does not require the consumption of stored cryogenic liquid product and the supply of warm gas from an external source.

Claims (1)

Claims of storage tank for storage of cryogenic liquid containing external and internal vessels with a device for discharge vapor of cryogenic fluid connected to a tubular heat exchanger and located in the interwall of the tank, characterized in that, in order to increase efficiency, the device for discharge of vapor contains a vortex tube, the inlet of which is connected to the vapor cavity of the inner vessel through a pneumatic valve, and the cold end with a heat exchanger installed in the steam cavity of the inner vessel.