METHOD OF SAMPLING HIGH-TEMPERATURE GASES AND DEVICE FOR ITS REALISATION Russian patent published in 2014 - IPC G01N1/24 

FIELD: measurement equipment.

SUBSTANCE: method to sample high-temperature gases at temperatures of up to 600°C includes measurement of gas volume pulled via a sampling probe by means of aspiration, and collection of condensate with reduction of the taken sample volume to normal conditions. To produce a representative sample that characterises a source of emission, the flow of high-temperature gases is cooled down to temperature of condensation of vapours of volatile components with account of fuel consumption and modes of engine operation. Aspiration of the sample volume is carried out with pressure difference in the condensate collector and in the flow of spent gases, besides, the flow of sampled high-temperature gas is used to create the "boiling layer" from initiators of condensation of volatile components vapours. At the same time the volume of the taken sample is compared to fuel consumption and mode of engine operation, and condensate is kept in the condensate collector under tight conditions to the start of stagewise investigation of concentration of separate components. The device comprises a sampling probe, a facility to measure the volume of high-temperature gases and a condensate collector. The sampling probe is equipped with a facility to measure temperature of sampled gases, the collector of condensate of spent gases has an external vacuumised heat-shielding shell, between layers of which there is a cryogenic liquid placed, and a facility to measure condensate temperature. Ball-shaped initiators of condensation are made of chemically inert material, which is capable of absorbing water vapours in spent gases composition. The cover of the condensate collector is thermally isolated from the vacuumised heat-shielding shell of the collector of spent gases condensate and nozzles for insertion of the sampling probe and discharge of cryogenically treated gases equipped with valves. At the same time the discharge nozzle is equipped with a filtering element, and the cover of the condensate collector has a control panel interconnected with the facility to measure temperature and gas volume taken for analysis, a level indicator of the cryogenic liquid and the facility to measure temperature of collected condensate.

EFFECT: development of the method and device to take representative samples of high-temperature gases of mobile sources of toxic emissions, which contain condensing elements that require special low-temperature conditions to keep them in the sample before entering them into a measurement device.

2 cl, 1 dwg