SU1182316A1 - Apparatus for creating liquid vapour concentration in gas flow - Google Patents

Description

The invention relates to gas analysis and can be used to create a calibration gas mixtures intended for testing gas analyzers.

The purpose of the invention is to improve the reliability and reliability of control of harmful impurities in the air by increasing the accuracy of creating concentrations of vapors mutually soluble. liquids by the largest component composition.

The drawing shows a diagram of the device.

The device comprises a vessel 1 with a multicomponent liquid 2 (i.e. a mixture of inter-soluble liquids), a device 3 for maintaining a constant level of the liquid connected to the vessel with a liquid, a calibrated tube 4 with an inside. with needle 5, into the gap between which fluid flows from vessel 1, additional tube 6 connected to chamber 7 for supplying gas for spraying, pneumatic lock 8 with which gas is supplied to evaporation, evaporator-mixer 9, booster 10, regulators 11 , 12 and 13, stabilizers 14, 15 and 16 and gauges 17,. 18 and 19 of the flow rate of the gas supplied to the spraying and evaporation, the ejector 20 for suctioning the vapor-gas mixture from the evaporator-mixer 9, the sampler 21. The booster 10, the regulator 12, the stabilizer 15 and the flow meter 18 form a line of gas supplied to the chamber 7 to spray the liquid , the booster 10, the regulator 13, the stabilizer 16 and the meter 19 constitute the gas line supplied to the pneumatic air valve 8 for evaporation.

The booster 10, the regulator 11, the stabilizer 14, the flow meter 17 constitute the line of gas supplied to the ejector 20 to dilute the gas mixture.

The device is also equipped with a thermostatic jacket (not shown) that is typical for this class of devices.

The device works as follows.

Liquid 2 from vessel 1 enters the gap between the calibrated tube 4 and the needle 5. At the same time, cleaned and dried air flows into the gaps between tube 4 and 6 of chamber 7.

The fluid, spreading over the needle 4, is picked up at the exit of the tube 4 by the air flow coming out of the gap between the tubes 5 and 6, it is crushed into parts.

The formed particles are accelerated by air flow, which at the exit has a speed of about 100 m / s and more.

The amount of air supplied to the spraying is not enough to completely evaporate the formed particles. Therefore, the design provides a special device-pkevmozatvor 8, which ensures the formation of a surrounding flow and creates the condition for complete evaporation of the particles of liquid.

The process of mixing the air flow and evaporation of the drops occurs in the evaporator-mixer 9.

Steam-air mixture from the evaporator-mixer 9 is sucked by the ejector 20 and is fed to the sampler 21.

To eliminate the influence of the pressure of the liquid column in the vessel on the value of the created concentrations, the device is equipped with a device 3 to maintain a constant level.

Gas flow stabilizers 14,

15 and 16 are designed to reduce the instability of maintaining concentrations due to the instability of the gas flow. Costs are regulated by the regulators 11, 12 and 13 and are measured by meters 17, 18 and 19.

A filter is used to clean and dry the gas.

The needle 5 in the upper part is threaded and thickened. head that allows you to shut off the flow of fluid into the gap at a time when the device is not working.

Improving the accuracy of creating concentrations of vapors of multicomponent liquids is provided firstly by increasing the stability of the spraying conditions (a thin constant gap between the needle 5 and the tube 4, the constancy of the liquid level, the constancy of the gas flow), secondly by creating the conditions for complete evaporation of the particles, multicomponent fluid (presence of a circumferential flow from chamber 7 through the gap between tubes 4 and 6 and the mixer à la diluent 9).

-04CHN

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1182316

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Claims (2)

1. DEVICE FOR. CREATING FLUID CONCENTRATION CONCENTRATION IN A GAS FLOW, containing a vessel with a liquid, connected to a sprayer, boosters, regulators, flow meters installed in the gas lines, a sampler that is different. the fact that, in order to increase the reliability of ^{9 9} Λ \ the accuracy and reliability of the control of harmful impurities in the air by increasing the accuracy of creating vapor concentrations of the sum of mutually soluble liquids in size and component composition, it is equipped with a pneumatic lock located coaxially to the atomizer connected to the atomizer by an evaporator-mixer, a chamber for supplying gas to the spray, the nebulizer is made in the form of a calibrated tube with a needle located inside it and an additional tube placed outside the calibrated tube at a distance from it and connected to the chambers oh for supplying gas for spraying. 2. The device according to claim 1, about t l and - _l., Which is provided with the fact that it is equipped with a device to maintain a constant level of liquid connected to a vessel with a liquid, an ejector connected to an evaporator-mixer, and a chamber for supplying gas for spraying, pneumatic valve and ejector are connected to flow meters installed in the gas lines. Charger „„ 1182316 > 1182316 2 one