SU890188A1 - Device for measuring vapor concentration rate - Google Patents

Description

The invention relates to experimental physics and can be used in the study of a two-phase flow.

A device for research is known. the condensation process in a two-phase flow, containing steam and water sources, a test section with a displacement chamber and connecting pipelines equipped with shut-off and control valves, and control and measuring means [1].

The disadvantage of this installation is the complexity of the process of equalizing the pressure in the sources of steam and water and the limited range under study, in the sense that condensation of pure steam can be studied at the installation, without the inclusion of non-condensable gases.

Closest to the proposed device is a device for measuring the rate of condensation of steam, containing an injector made ^{in the} form of a mixing chamber with steam and liquid nozzles, a drain tank in communication with the displacement chamber, connecting pipelines equipped with shut-off and control valves, and measuring sensors with devices [2 ].

A disadvantage of the known device is the limited range under study, investigated the condensation of pure steam, without the inclusion of non-condensable gases.

The aim of the invention is to expand the range of the studied mixtures.

This goal is achieved by the fact that the device for measuring the rate of condensation of steam, comprising an injector made in the form of a displacement chamber with steam and liquid nozzles, a drain tank in communication with the displacement chamber, connecting pipelines equipped with shut-off and control valves and measuring sensors with devices, in addition contains a hermetic box with gas and liquid, along the axis of which a heating tank is installed, and the upper part of the box is connected to the steam nozzle and communicated through a valve with heating tank,) and through the check valve - with a drain tank.

The drawing schematically shows the proposed device.

The device comprises an injector in the form of a mixing chamber 1 with a car-2 and liquid 3 nozzles, a drain tank 4, shut-off and control valves 5, measuring sensors with devices 6, an airtight box 7 with gas 8 and liquid 9, the axis of which have a heating tank 10 , high-speed valve 11, non-return valve 12 and measurement unit 13.

The upper gas part 8 of block 7 is connected to the steam nozzle 2 and communicated through the valve. 11 with a heating capacity of 1 °, and through a check valve 12 with a drainage capacity of 4, the liquid 9 of the box 7 is connected to the liquid nozzles 3, and the measuring sensors with devices to the measuring unit 13. '

The study of the condensation process is carried out as follows ..

The pressurized box 7 is prepared for the experiment, i.e., it is filled with coolant and non-condensable gas under investigation and the pressure necessary to ensure the calculated amount of gas in the vapor stream is created.

In the particular case, to study the condensation process in accident localization devices at nuclear power plants, the gas volume is filled with air.

Steam is generated in the heating tank 10, the pressure is increased, up to the design pressure, and a high-speed valve 11 is opened.

The resulting vapor enters the gas' volume of box 7, increases the pressure in the box, mixes with non-condensable gas and the mixture passes into the steam nozzle 2.

At the same time, water, under the influence of pressure in box 7, passes into the liquid nozzles 3 and is supplied to the displacement chamber 1. In the mixing chamber

The mixture is in contact with water, the steam condenses and the condensation process is detected by measuring Sensors with devices 6,

The mixture of condensed gas with condensate is discharged into a drain tank 4. When steam is condensed and the pressure is created at the outlet of the displacement chamber by a large pressure in the sealed box 7, the check valve 12 is activated and some of the gas is transferred to box 7.

The presence of a sealed box with gas and liquid provides the supply of steam and water to the mixing chamber with the same pressure and allows you to adjust the composition and amount of non-condensable gases in the steam rod.

Claims (2)

The invention relates to experimental physics and can be used in the study of two-phase flow. A device for studying a two-phase flow condensation process is known. It contains steam and water sources, a test section with a displacement chamber and connecting pipelines equipped with valves and gauges. l. The disadvantage of this installation is the complexity of the pressure equalization process in the steam and water sources and the limited range under study in the sense that the installation can test the condensation of pure steam without the inclusion of non-condensable gases. Closest to the present invention is a device for measuring the rate of vapor condensation, containing an injector, made in the form of a mixing chamber with steam and liquid nozzles, a drainage vessel connected to the displacement chamber, connecting pipelines equipped with valves and gauges 2. A disadvantage of the known device is the limited range under study, the condensation of pure steam is investigated, without the inclusion of non-condensable gases. The aim of the invention is to expand the range of the tested mixtures. This goal is achieved by the fact that a device for measuring the rate of steam condensation, containing an injector made in the form of an offset chamber with steam and liquid nozzles, drainage connected to the mixing chamber, connecting pipelines equipped with valves and gauges, additionally contains a hermetic box with gas and liquid, along the axis of which a heating tank is installed, the upper part of the box being connected to the steam nozzle and communicating through the valve to the steam nozzle atelnoy capacity, and through a check valve - with splvaoy capacity. In the drawing szhiematichaski depicted podpvgayemy device. The device contains an injector in the form of a mixing chamber 1 with a flat-2 and liquid 3 nozzles, a spiking tank 4, aaporno-regulating armature 5, an immersion gauge with devices 6, a sealed bsgc 7 with gas 8 and a vein 9, in the axis of which it sets And Iagrva 1 "Lei capacity 1O, high-speed Clagt 11, reverse valve 12 and B (measurements 13. The upper gas 8, 7, connected to the air nozzle 2 and communicated through the valve. 11 with the heating capacity 1O, and through the check valve 12 with drain tank 4, the liquid 9 of the box 7 is connected to the liquid 3 measuring probes with instruments to measurement unit 13. The condensation process was investigated in a very subtle way.The sealed box 7 was prepared for the experiment, i.e. it was filled with coolant and the non-condensable gas under investigation and created pressure necessary to provide the estimated amount of gas in the vapor stream. In the particular case, to investigate the condensation process in the location of an accident at a nuclear power plant, the gas volume is filled with air. Steam is generated in the heating tank Yu, the pressure is increased to the current one and the quick-acting valve 11 is opened. The generated steam enters the gas volume of the box 7, increases the pressure in the box, mixes-with non-condensable gas and the mixture turns into steam with concurrent 2. by the action of shvlens in the base 7 passes into the liquid nozzles 3 and is fed into the chamber with c / resch6n. In the mixing chamber of the vapor-gas 8 mixture comes into contact with water, the steam is condensed and the co-condensation process is fixed by measuring Sensors with instruments 6, Mix gas condensated with condensate, condensate, is condensed into a drainage tank 4. When steam condenses and creates pressure at the outlet of the displacement chamber by a large pressure G1 in the repMewffloM botse 7, the check valve 12 is activated and part of the gas is transferred to the box 7, the presence of a sealed box with gas and liquid provides steam and water. into the mixing chamber with odiac pressure and allows the composition and amount of non-condensable gases in the steam rod to be adjusted. Apparatus of the Invention A device for measuring the vapor condensation rate, containing an injector made in the form of a mixing chamber with steam and liquid nozzles, a drainage container communicated with the mixing chamber, connecting pipelines equipped with a stop-valve and U-measuring sensors with instrumentation, characterized in that with a chain of expansion of the range of the mixtures under study, it additionally contains a pressure box with gas and liquid, along whose axis the heating tank is installed, and the upper part of the tank is connected Yuchena to steam - pump and communicated through the valve with the heating capacity, and through the check valve - with the drainage capacity. . Information taken into account during the examination 1. Kalinin Yu. F. et al. Study of the characteristics of a self-evaporating fluid in Laval nozzles, Teploenergekhztik and mechanical engineering. Proceedings of MEI, vol. 104/1972, p. 26-ZO. 2. Kuznetsov, V.I., Levin, A.A., Installation of a periodic action for the study of biphasic vapor-liquidity of waves. - Thermal physics of high temperatures, vol. 6, 16, 1970, p. 1280 (prototype).