Dustproof system and method for detection probe of acid dew point instrument

Abstract

The invention discloses a dustproof system and a dustproof method for a detection probe of an acid dew point instrument. The dustproof system comprises a filter element, a first connecting device, a sleeve, a sealing gasket, a second connecting device, a sleeve cover plate, an air pump connector, a connecting pipe, an air channel controller, a compressed air connector, an air channel regulating valve, a vacuum pressure meter, a connecting pipe and an air pump. The air pump is started to pump air, and fume enters a dustproof device through the filter element; the aperture of the filter element is 1-10 microns, dusty fume can be effectively filtered, and smoke dust is obstructed outside the filter element, so that clean fume passes through the filter element and reaches the surface of the probe of the acid dew point instrument, and the filter element can be subjected to blowback ash removal by regulating the air channel regulating valve. A complicated fume heat tracing insulation device is not needed, and the dustproof system has the characteristics of simplicity, compact structure, convenience in assembly and disassembly and convenience in carrying; in addition, the dustproof system can be widely applied to dustproof treatment of probes of similar detection instruments without limitation to the probe of the acid dew point instrument.

Description

technical field [0001] The invention belongs to the technical field of flue gas detection, and in particular relates to a dust-proof system and a dust-proof method for a detection probe of an acid dew point meter. Background technique [0002] When the boiler burns sulfur-containing fuel, the SO formed after combustion 2 Part of it will be further oxidized to SO 3 , and combine with the water vapor in the flue gas to form sulfuric acid vapor. The condensation temperature of sulfuric acid vapor in the flue gas is called the acid dew point, which is much higher than the water dew point. flue gas SO 3 (or sulfuric acid vapor) content is more, the higher the acid dew point, the acid dew point in the flue gas can reach 140 ~ 160 ℃, or even higher. These gaseous sulfuric acid vapors will condense when the temperature is lower than the acid dew point temperature. For example, sulfuric acid solution will be condensed on the low-temperature heating surface of the boiler and flue,...

AI Technical Summary

Problems solved by technology

When this type of acid dew point meter is used to measure dusty flue gas, the dust will be adsorbed on the surface of the mirror sensor after the probe is inserted into the flue. When the dust forms a certain thickness, the surface of the sensor cannot form an acid film, so that there is no gap between the two electrodes of the sensor. Current flows, unable to detect acid dew point temperature

Especially when measuring the flue gas of a coal-fired power plant, even at the outlet of the electrostatic precipitator, the dust in the flue gas has a great impact on its normal measurement, and at the inlet of the dust collector, the instrument cannot work at all

In short, the existing commercially available acid dew point meter is not suitable for measuring the acid dew point of flue gas with a lot of dust

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