Flue gas multi-component measurement system and use method

Abstract

The invention discloses a flue gas multi-component measurement system and a use method. The system comprises a high-temperature chamber, and a multi-component measurement device, an oxygen measurement device, an ammonia gas measurement device and a jet device which are arranged in the high-temperature chamber, the multi-component measuring device comprises a multi-component measuring cell, and a sample injection pipe, a vacuum meter, an NO dilution probe interface, an NO direct extraction method measuring interface and a CO measuring interface which are sequentially arranged on the multi-component measuring cell; the oxygen measuring device comprises an oxygen measuring pool, and an oxygen measuring interface is arranged on the oxygen measuring pool; the ammonia gas measuring device comprises an ammonia measuring cell, the ammonia measuring cell is provided with a spectrum method ammonia measuring interface, a connecting pipe is arranged between the ammonia measuring cell and the oxygen measuring cell, and the connecting pipe is provided with an extraction method ammonia measuring interface; the jet device comprises a jet device. The to-be-measured flue gas is introduced through the sample introduction pipe, so that the flue gas measured by each component measuring instrument is consistent in source and flow velocity, the measurement error is effectively reduced, and the measurement and analysis difficulty caused by different flue gas sources is avoided.

Description

technical field [0001] The invention belongs to the technical field of measuring gaseous pollutants, and in particular relates to a flue gas multi-component measuring system and a use method. Background technique [0002] With the retrofit of ultra-low emission of flue gas denitrification in coal-fired power plants, the efficiency of denitrification is gradually increasing, and ammonia escape is also gradually increasing. Due to the harmfulness of ammonia escape to the air preheater and the tail flue, each power plant has to adjust the NOx of the denitrification outlet. The uniformity puts forward higher requirements. The efficiency control of coal-fired boilers needs to measure the CO composition of the flue gas. With the development of science and technology, there will be various requirements for the measurement of the flue gas composition. On the flue wall, the measurement sample gas of each instrument is not from the same source, which brings certain troubles to the dat...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a flue gas multi-component measurement system and usage method to solve the problem of inconsistent measurement sources of each component of denitrification flue gas in the above-mentioned background technology , Unstable flue gas flow rate, difficult analysis and processing of measurement data, and difficulties in the arrangement of interfaces on the flue wall

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