SU438906A1 - Gas analyzer - Google Patents

Description

This invention relates to analytical instruments and can be used for the analysis of gases.

Gas analyzers are known that contain comparative and measuring cells, metering devices, a gas flow controller and a command unit. These gas analyzers cannot be used for analysis with several reagents.

In order to extend the class of test objects, a logic circuit is introduced into the proposed gas analyzer consisting of a serially connected logic element and capacitance. An uncontrolled valve is installed in the direct channel of their connection.

The drawing shows a functional diagram of the proposed gas analyzer.

The gas analyzer contains a command unit 1, a metering device 2, a bubbling chamber 3, a tank 4 with a valve 5, a booster 6 for the flow rate of the sample gas, a gas flow controller 7, a filter 8, a logic element 9, a metering device 10, a measuring unit 11, a measuring cell 12 , comparative cuvette 13, gas flow booster 14, tank 15 for discharging the spent solution.

The cycle of the gas analyzer starts from supplying the pneumatic control unit from block 1 to the metering device 2, which delivers the reagent dose to the bubbling chamber 3. At the same time, the pneumatic signal goes to the tank 4, opens the valve 5 and turns on the booster 6 of the analyzed gas and the gas flow controller 7. the analyzed gas flows through the filter 8 into the bubbling chamber 3. In addition, the pneumatic signal from block 1 is sent to the logic element 9 and locks the metering device 10, which is filled with reagent.

With the falling edge of the command pulse, the metering device 2 is filled with reagent, logic element 9 is closed, and compressed air is passed to the metering device 10, which sends a dose of reagent to the bubbling chamber 3. At the same time, valve 5, under pressure of compressed air, closes the tank 4, bubbling. After the end of the command and the termination of the air supply in the chamber 3, sparging continues.

After the end of the bubbling, from block 1, a command is received to measure by block 11,

which fixes the optical density of the reagent in the measuring cuvette 12 relative to the optical density of the reagent in the comparative cuvette 13. After the measurement from the command unit 1, the compressed air is supplied to the gas flow booster 14, which creates a discharge in the tank 15. the reagent does not fully dissolve into the tank 15. After draining the spent reagent, the cycle of the gas analyzer is repeated.

Subject invention

Claims (4)

1. A gas analyzer containing a measuring and comparative cell, a radiation source, metering devices, a command unit, a regulator and a consumption gas analyzer, characterized in that, in order to expand the class of test objects, it contains a logic circuit consisting of a logic element NOT and containers that are connected in series with each other and connected by an uncontrolled valve. 2. A gas analyzer according to claim 1, characterized in that an uncontrolled valve is installed in the forward channel connecting the logic element and the container. 3. Gas analyzer according to claim 1, characterized in that the tank is connected to the inlet of the flow rate analyzer. 4. The gas analyzer according to claim 1, differing in that the output of the logic element is connected to the input of the metering devices.