Coal-fired power plant boiler flue gas acid dew point detection system and detection method

Abstract

The invention discloses a coal-fired power plant flue gas acid dew point detection system and detection method. The detection system comprises a sampling device, a measuring device, an auxiliary device, a pH tester, and a controller; the sampling device comprises an asbestos screen pipeline, a precise dustproof cover pipeline, and an electric heating pipeline, which is connected to a bypass air inlet pipeline; the measuring device comprises a testing box, an observation glass window is embedded on the testing box, a quickly-shooting camera is arranged behind the observation glass window and is connected to a display screen, an ash blowing device and a cold mirror are arranged in the testing box, the cold mirror is opposite to the observation glass window and is laminated on a refrigerating pile, which contacts a water-cooling heat-dissipation unit; the auxiliary device comprises a discharge pipeline, a steam / water separator, a drying machine, and a discharge pipeline vacuum pump, and each pipeline is provided with a valve. The detection system can directly obtain acid dew points of flue gas on site, and thus can provide references for the design and safe operation of station units. The invention also discloses a detection method thereof at the same time.

Description

technical field [0001] The invention relates to a detection device and method for flue gas acid dew point in the energy and electric power industry, in particular to a detection system and detection method for flue gas acid dew point of a coal-fired power plant boiler. Background technique [0002] In view of the fact that during the "Twelfth Five-Year Plan" period, the state clearly proposed to comprehensively promote waste heat and pressure recovery and utilization technology in industries rich in waste heat and pressure resources, promote the recovery and utilization of low-quality heat sources, and form a cascade comprehensive utilization of energy. At present, the key to restricting the utilization of low-temperature waste heat from power plant boiler flue gas is the acid dew point corrosion of metal materials. The acid dew point of flue gas is an important index for the technical design of waste heat and pressure recovery and utilization of flue gas, which is of great i...

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Problems solved by technology

[0003] The acid dew point detection device currently used mainly uses the current method to detect the flue gas with high sulfur content and low dust content in the petrochemical industry. Gas has a large deviation

At the same time, since the acid dew point of the flue gas is not only affected by the operating conditions of the unit, but also closely related to the coal quality of the fuel, the acid dew point obtained by estimating the acid dew point of the flue gas through the empirical formula is quite different from each other, and is very different from each other. Difficult to play a good guiding role

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