SU705217A1 - Apparatus for evaporating cryogenic liquids - Google Patents

Description

I

The invention relates to refrigeration engineering, in particular, to devices for the evaporation of cryogenic liquids, and can be used in gas processing installations, for example, for air separation by low-temperature distillation.

A device for evaporating a cryogenic liquid (rapid evaporator evaporator) is known, comprising a housing with nozzles for supplying a cryogenic liquid and a heating medium (for example, water vapor or hot water), for withdrawing gas and heating medium (for example, condensate or cold water) the collectors connected among themselves by tubes. The fluid is supplied to the lower manifold, the resulting gas is collected in the upper manifold, and the heating medium is supplied to the annular space 1. /

The disadvantage of this device is the low intensity of heat exchange during evaporation of cryogenic liquid in the tubes, which increases the weight and size characteristics, as well as low reliability and durability.

A device comprising a housing with nozzles for supplying liquid and a gaseous heat carrier for withdrawing gas, as well as an atomizer (bubbling grill) C23, is known.

The disadvantage of it is also high weight and dimensional characteristics, high reliability and durability.

The aim of the invention is to reduce the weight and size characteristics by intensifying heat transfer during evaporation of cryogenic liquids, as well as improving reliability and durability.

Claims (2)

This is achieved by the fact that the proposed device for evaporation of a cryogenic liquid is provided with a drain pipe formed during the operation of the condensate, below which a sprayer is installed, made in the form of two plates installed to form an annular mixing chamber, each of which is fixed to water vapor, and between the plates there is a disk, which forms an annular nozzle with a plate attached to the water vapor supply nozzle, and with a plate attached to the pipe e fluid supply - annular gap. A shell can be placed between the body and the sprayer. - The drawing shows schematically the proposed device for the evaporation of cryogenic liquids, a general view. In the device case 1, a sprayer 2 and a shell 3, nozzles for supplying liquid 4 and water vapor 5, gas exhaust 6 and condensate drain 7 are installed. The sprayer 2 is made in the form of two plates of the bottom 8 and top 9, between which there is a disk 10. Top plate 9, attached to the liquid supply nozzle 4, forms an annular gap I with the disk 10, and the bottom plate 8 attached to the water supply nozzle 5 5 forms an annular nozzle 12 with the disk 0, the shape and cross section of which is chosen depending on the heat load and steam consumption. The lower 8 and upper 9 plates form an annular displacement chamber 13, which communicates with the annular gap 11 and the annular nozzle 12. The shell 3 is installed between the housing 1 and the spray gun 2. The device operates as follows. The housing is filled with water. The water level is determined by the height of installation of the condensate drain pipe 7 and must ensure complete evaporation of the liquid droplets formed in the dispenser as they move in the water (condensate). The liquid 4 and steam 5 supply nozzles are respectively supplied with a cryogenic liquid and water vapor, which from the annular gap 11 and the annular nozzle 12 enter the annular displacement chamber 13 and are discharged from the atomizer 2 at a high velocity. The water vapor condenses, preheats the water, and the liquid droplets evaporate. due to the supply of heat from the heated water and in the form of bubbles, they rise and are discharged through the gas outlet 6. Shell 3 improves the circulation of heated water in the housing, which contributes to improved circulation and noBbiujaeT heat exchange, when the cryogenic liquid evaporates. The weight and size characteristics of the proposed device are reduced due to the intensification of heat exchange, and its reliability and durability increase. Claim 1. Investigation device for evaporation of cryogenic liquids, comprising a housing with nozzles for supplying liquid and water vapor, from which the evaporator is installed. characterized in that, in order to reduce the weight and size characteristics of reliability and durability, it is equipped with a condensate discharge pipe during operation, below the level of which is placed an atomizer made in the form of two plates installed to form an annular mixing chamber, each of which is fixed accordingly on the pipes for the supply of liquid and water vapor, and between the plates there is a disk, which forms a ring nozzle with a plate fixed on the pipe for the supply of water vapor; minutes, fixed to the liquid supply pipe, - an annular gap. 2. The device according to claim 1, characterized by the 7th., That between the case and the sprayer, i; ei; Sources of information taken into account in the examination 1. V. Gorokhov. Apparatus for air separation plants. M., “Mashinostroenie, 1955, p. 109 .. 2 USSR Author's Certificate No. 401883, cl. F 28 D7 / 00, 1971.