RU62248U1 - INSTALLATION FOR TESTING GAS ANALYZERS - Google Patents

Abstract

The utility model relates to the field of testing and research of instruments and materials and can be used to test the operability and measurement limit of gas analyzers at the enterprises of the chemical industry, instrument making, and in the metrological and environmental services. Achievable technical result:

- providing testing of gas analyzers under conditions of increased humidity of the surrounding housing;

- ensuring the safety of testing gas detectors of toxic gases;

- elimination of the emission into the atmosphere of toxic gases used in testing gas analyzers.

The essence of the utility model is as follows. The apparatus for testing gas analyzers contains a sealed gas chamber (1), a device (2) connected to it for introducing a reference analyte, a pipe (3) with a valve (4) for introducing purified air, and a pipe (5) with a valve (6) for the output of the vapor-air mixture, as well as the fan located in the sealed gas chamber (7). The installation additionally has a device for creating increased air humidity (8) in the form of an aerosol generator connected by an additional nozzle (9) to a valve (10) with a sealed gas chamber, a moisture meter (11), the sensor (12) of which is located inside the sealed gas chamber, with an exhaust cabinet (13) and exhaust ventilation system (14), the entrance of the exhaust ventilation system is connected to the exhaust hood (13) and the sealed gas chamber (1), and the outlet to the filter for air purification (15). A device (2) for introducing a reference analyte and a test gas analyzer (16) are located in a fume hood (13).

Description

The utility model relates to the field of testing and research of instruments and materials and can be used to test the operability and measurement limit of gas analyzers at the enterprises of the chemical industry, instrument making, and in the metrological and environmental services.

Currently known installation for testing gas mixtures, containing a sealed container with a gas mixture connected to a gas analysis device, which is used as indicator tubes, see patent of the Russian Federation No. 2136536, class G 01 N 31/00, published 10.09.1999 g A disadvantage of the known installation is the inability to test gas analyzers in conditions of high humidity.

A gas analyzer test apparatus is also known, comprising a sealed gas chamber, a device for inputting a reference analyte connected to it, a nozzle with a tap for introducing purified air, and a nozzle with a tap for discharging the vapor-air mixture, as well as a fan located in a sealed gas chamber, see DC Koller "Metrological Foundations of Gas Analytical Measurements", Publishing House of the Committee of Standards, Measures and Measuring Instruments under the Council of Ministers of the USSR, Moscow 1967, pp. 181-182. In a known installation, a device for inputting a reference analyte is made in the form of a burette. The disadvantages of this installation are:

- the impossibility of testing gas analyzers in conditions of high humidity;

- increased danger of testing gas analyzers of toxic gases, in particular, used by a potential adversary;

- emission of toxic gases used in the testing of gas analyzers.

In this utility model, the task is to create such a setup for testing gas analyzers, which would determine:

- providing testing of gas analyzers under conditions of exposure to high humidity;

- ensuring the safety of testing gas detectors of toxic gases;

- elimination of the emission into the atmosphere of toxic gases used in testing gas analyzers.

The solution to this problem is provided due to the fact that the installation for testing gas analyzers containing a sealed gas chamber, a device connected to it for introducing a reference analyte, a nozzle with a tap for introducing purified air and a nozzle with a tap for discharging the vapor-air mixture, and also located in a sealed the gas chamber, the fan additionally has a device for creating increased air humidity in the form of an aerosol generator connected by an additional nozzle to a tap with a sealant hydrochloric gas chamber, moisture meter, which sensor is disposed within the sealed gas chamber and hood ventilation system. The inlet of the exhaust ventilation system is connected to a fume hood and a sealed gas chamber, and the outlet is connected to a filter for air purification. A device for introducing a reference analyte and a test gas analyzer are located in a fume hood.

The claimed installation for testing gas analyzers has a combination of essential features unknown from the prior art for

devices of this purpose, which allows us to conclude that the criterion of "Novelty" for the utility model.

The device of the proposed utility model is illustrated using the attached drawing, figure 1 which shows a functional diagram of the installation.

The device of the utility model is as follows.

The apparatus for testing gas analyzers contains a sealed gas chamber (1), a device (2) connected to it for introducing a reference analyte, a pipe (3) with a valve (4) for introducing purified air, and a pipe (5) with a valve (6) for the output of the vapor-air mixture, as well as the fan located in the sealed gas chamber (7).

The installation additionally has a device for creating increased air humidity (8) in the form of an aerosol generator connected by an additional nozzle (9) to a valve (10) with a sealed gas chamber, a moisture meter (11), the sensor (12) of which is located inside the sealed gas chamber, with an exhaust cabinet (13) and exhaust ventilation system (14), the entrance of the exhaust ventilation system is connected to the exhaust hood (13) and the sealed gas chamber (1), and the outlet to the filter for air purification (15). A device (2) for introducing a reference analyte and a test gas analyzer (16) are located in a fume hood (13).

At the inlet of the exhaust system, connected to a sealed gas chamber (1), a valve (17) is installed. The valve (17) closes when a predetermined concentration of the reference analyte is created in the gas chamber, and opens when the sealed gas chamber (1) is purged with clean air.

The exhaust ventilation system (14) has a fan, the inlet of which is connected to a filter for air purification (15).

A device for introducing a reference analyte is made in the form of a flask with nozzles for introducing clean air and removing vapors of a reference analyte. A sample of a liquid reference analyte located on a paper accordion is placed in the flask. When pure air is supplied to the flask, the sample evaporates and a predetermined amount of the reference analyte enters the sealed chamber (1), which is evenly distributed inside the chamber (1) by the fan (7).

The tested gas analyzer and the device for introducing the reference analyte is located in a fume hood (13), which ensures the safety of staff when testing gas analyzers of toxic gases, in particular, used by a likely adversary.

To create increased humidity of the surrounding air, the valve (10) opens and the aerosol generator is turned on, which acts as a device (8) to create increased humidity. At the same time, a finely dispersed water aerosol enters the sealed chamber (1). During the evaporation of aerosol particles, water vapor forms, which are evenly distributed by the fan (7) in a sealed gas chamber. Control of increased air humidity created by a sealed chamber is carried out using a moisture meter (11). After reaching the required humidity, the valve (10) closes, and the aerosol generator turns off.

The test gas analyzer is connected to the pipe (5).

To test the gas analyzer, the valve (6) opens and the gas analyzer is turned on. At the same time, from the sealed chamber (1), a reference analyte with a given concentration and a given humidity of the ambient air enters the gas analyzer (16).

After testing the gas analyzer (16), the valve (6) closes, the gas analyzer (16) turns off and the valve (4) and the valve (17) open. In this case, the sealed gas chamber (1) is purged with clean air, and the reference analyte is deposited on the filter (15), preventing toxic gases from entering the atmosphere.

The proposed useful product can be repeatedly made on the basis of materials commercially available by the domestic and foreign industry using modern mastered technology and can be used to test the performance and sensitivity tests of various gas analyzers of toxic impurities at the enterprises of the chemical industry, instrumentation, and the metrological and environmental services, which allows to conclude that the utility model meets the criterion of "industrial applicability".

In accordance with the proposed model, various versions of prototypes of installations for testing gas analyzers having various volumes of a sealed gas chamber from 1 to 10 m ^{3 were} manufactured. The pilot operation of the manufactured gas analyzer test rigs has confirmed their high reliability, safe operation for service personnel and a wide range of concentrations of the reference analyte and increased humidity in the airtight gas chamber, as well as preventing the release of toxic gases into the atmosphere.

Claims (1)

An apparatus for testing gas analyzers, comprising a sealed gas chamber, a device for inputting a reference analyte connected to it, a nozzle with a tap for introducing purified air and a nozzle with a tap for discharging the vapor-air mixture, and also a fan located in the sealed gas chamber, characterized in that the installation additionally has a device for creating increased air humidity in the form of an aerosol generator connected by an additional nozzle to a tap with a sealed gas chamber, moisture the sensor of which is located inside the sealed gas chamber, a fume hood and exhaust ventilation system, the input of the exhaust ventilation system being connected to a fume hood and a sealed gas chamber, and the output to a filter for air purification, while the device for introducing a reference analyte and a tested gas analyzer located in a fume hood.