SU85008A1 - Instrument for determining gaseous impurities in the air - Google Patents

Description

Devices for determining gaseous impurities in air are known based on the principle of measuring the pressure drop across a porous vessel wall, which contains an absorber of a detectable impurity.

In the proposed device, in order to eliminate the influence of pressure fluctuations of the gas-air mixture under investigation on the differential pressure gauge, the chamber with the gas-air mixture is connected to the pressure gauge through an empty porous vessel whose stems are made of the same porosity material as the walls of the vessels with the absorber.

In order to simultaneously determine various impurities in the gas-air mixture, the proposed device uses several vessels with walls of the same porosity, but containing different scavengers.

The drawing shows a General view of the device.

The gas-air mixture, the passage through the channel / with a constant flow rate fixed by the rheometer 2, flows through the filter 3, the cleansing mixture of impurities, into the chamber 4. Four vessels 5, 6, 7 and 8 with porous walls are placed in this chamber, which can be applied porcelain bacterial filters. Vessels 5, 6 and 7 contain absorbers of various impurities, and vessel 8 is empty.

The walls of vessel 8 are made of a material of the same porosity as the walls of vessels with absorbers.

Vessels 5, 6 and 7 s. the absorbers are connected to the differential pressure gauge 9 by means of a tube 10 and taps P, 12 and 13, which are switched on alternately.

No. 85008-2 -

The connection of the chamber 4 with the test gas-air mixture to the pressure gauge 9 is carried out through an empty vessel 8 and the tube 14.

, DIGITALITY is necessary in order for the oscillation of the external. They were transferred to both cups of the manometer with the same speed And / therefore, less affected the instrument readings.

Using a differential pressure gauge 9, the difference between the pressure in the internal cavity of the porous vessels with absorbers and the external pressure of the gas-air mixture in the chamber is measured.

Gas escapes from the chamber through a wide opening in the chamber wall to reduce fluctuations in measured pressures.

Subject invention

Claims (3)

1. A device for determining gaseous impurities in the air, based on the principle of measuring the pressure drop on the porous wall of a vessel containing an absorber of a defined gaseous impurity and located in the gas-air medium under investigation, free from impurities that cannot be determined, characterized in the influence of pressure fluctuations of the gas mixture under test on the readings of the differential pressure gauge; the chamber with the air-gas mixture is connected to the differential pressure gauge through From an empty porous vessel whose walls are made of a material of the same porosity as the walls of the vessels with an absorber. 2. The device according to claim 1, characterized in that, in order to simultaneously determine various impurities in the gaseous mixture, several vessels with walls of material of the same porosity with different absorbers, alternately connected to the pressure gauge by means of taps, are used in it. 3. The device according to paragraphs. 1 and 2, characterized in that, for example, porcelain bacterial filters are used as porous vessels.  /four: