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

Abstract

The invention discloses a coal-fired power plant boiler flue gas acid dew point detection system and detection method. The detection system includes a sampling device, a measuring device, an auxiliary device, a pH tester and a controller. The dust cover pipeline and the electric heating pipeline, the electric heating pipeline also bypasses the air intake pipeline; the measuring device includes a test box, the test box is embedded with an observation glass window, a snapshot camera is placed behind the observation glass window, the snapshot camera and the display The test box is also equipped with a soot blower and a cold mirror. The cold mirror is facing the observation glass window and fits with the refrigeration stack. The refrigeration stack is also in contact with the water-cooled heat dissipation unit; the auxiliary device includes the discharge pipeline and the soda Separator, dryer and discharge pipeline vacuum pump, each pipeline is equipped with valves. The detection system can directly obtain the acid dew point of flue gas from the site, which has important guiding significance for the design and safe operation of power plant units. The invention also discloses its detection method.

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 station 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...

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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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