Sulfur trioxide online continuous measurement system with rapid response and method thereof

Abstract

The invention relates to a sulfur trioxide online continuous measurement system with quick response and a method thereof. The system comprises a sampling measurement unit and a control system connected with the sampling measurement unit, wherein the sampling measurement unit comprises a multi-channel sampling gun, a flue gas collecting device and a flushing device which are respectively connected with channels of the multi-channel sampling gun in a one-to-one correspondence manner, and a shared sulfate ion measuring device; the flue gas collecting device comprises snakelike condensation pipes connected to outlets of all channels of the multi-channel sampling gun, and gas-liquid separators, gas flow meters and gas pumps which are sequentially connected to outlets of all the snakelike condensation pipes through first outlets of three-way electromagnetic valves; the flushing device comprises flushing liquid storage tanks which are correspondingly connected with inlets of the S-shaped condensation pipes through independent flushing pipelines; the sulfate ion measuring device comprises a collected liquid storage tank connected through a second outlet of the three-way electromagnetic valve, and a reaction bed and a photoelectric signal detection system which are connected with an outlet of the collected liquid storage tank; an input end of the reaction bed is also connected with a standard liquid storage tank.

Description

technical field [0001] The present invention relates to SO in flue gas 3 The on-line measurement of concentration is specifically a fast-response sulfur trioxide on-line continuous measurement system and a method thereof. Background technique [0002] SO in the flue gas of coal-fired units 3 It is easy to cause corrosion of boiler piping equipment, and in recent years, international coal prices have risen, and coal is scarce. Many power plants are mixed with high-sulfur coal for power generation, which is likely to cause more serious corrosion problems of boiler piping equipment; in addition, the SO emitted from chimneys 3 It is an important precursor for the formation of PM2.5, which is easy to cause atmospheric smog. SO in coal-fired flue gas 3 On-line monitoring is not only helpful for environmental protection workers to understand the SO 3 It also has important guiding significance for thermal power plants to adjust the amount of ammonia injection and the blending ra...

AI Technical Summary

Problems solved by technology

There are already SO in the industry based on the sampling principles of isopropanol absorption method and controlled condensation method 3 On-line analyzer, SO developed based on isopropanol absorption method 3 The online analyzer can display the measurement data in real time, but this equipment has not been promoted in the industry. A small number of scientific research institutions have purchased the instrument, and are conducting some research on the measurement accuracy. The research found that the measurement accuracy of the tester is 60-80%. , unable to reflect the real SO in the flue gas 3 Concentration

SO developed based on the controlled condensation method 3 On-line analyzer can accurately measure SO in flue gas 3 Concentration, but the instrument displays measurement data intermittently, and cannot display SO in flue gas in real time 3 Concentration, there is a disadvantage of intermittently displaying measurement data with a long time interval

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