Flue gas sampling device, and flue gas monitoring system of SCR reactor
A flue gas sampling and flue gas technology, applied in sampling devices, sampling, measuring devices, etc., can solve problems such as water vapor condensation and affecting the accuracy of NOx concentration values
Pending Publication Date: 2021-04-09
呼和浩特科林热电有限责任公司 +2
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Problems solved by technology
[0003] When sampling the flue gas in the SCR reactor, because the flue gas contains SO 2 , NO X , SO 3 , NH 3 And water vapor, when the flue gas temperature is low, it will cause water vapor condensation, which will affect the accuracy of calculating the NOx concentration value in the flue gas
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[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them.
[0028] Existing flue gas sampling devices generally include a sampling tube and a filter device. In order to avoid clogging of the filter device, the dust on the filter device is blown back into the flue. Since the flue gas contains SO 2 , NO X , SO 3 , NH 3 and water vapor, compressed air at normal temperature is used as the backflush air source, and when it enters the filter device, the water vapor will be condensed quickly and combined with SO 2 , SO 3 , NH 3 reaction, so ammonium salts will be generated and bonded to the surface of the stainless steel filter screen. In order to avoid the impact of flue gas condensat...
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The invention provides a flue gas sampling device, and a flue gas monitoring system for an SCR reactor. The flue gas sampling device comprises an electric heat tracing type sampling gun, a blowback electromagnetic valve and a temperature controller, the electric heat tracing type sampling gun comprises a heatable sleeve, a first port of the heatable sleeve is used for collecting flue gas, a filter element is arranged in a second port of the heatable sleeve, the second port is further connected with a branch pipe device, the branch pipe device comprises a flue gas output end and a compressed air input end, and the flue gas output end is used for outputting the flue gas sampled by the electric heat tracing type sampling gun; the temperature controller is connected with the heatable sleeve, and the temperature controller is used for controlling the temperature in the heatable sleeve to be within a preset temperature range; and the input end of the blowback electromagnetic valve is connected with the compressed air storage tank through a pipeline, and the output end of the blowback electromagnetic valve is connected with the compressed air input end through a pipeline. According to the invention, flue gas condensation in the sampling pipe can be avoided, and the interference of sampled flue gas impurities on NOx concentration value measurement is reduced.
Description
technical field [0001] The invention relates to the technical field of flue gas sampling, in particular to a flue gas sampling device and a flue gas monitoring system of an SCR reactor. Background technique [0002] The National Development and Reform Commission, the Ministry of Environmental Protection and the National Energy Administration jointly issued the "Coal Power Energy Conservation and Emission Reduction Upgrading and Transformation Action Plan (2014-2020)", requiring that by 2020, all coal-fired power plants that are eligible for transformation in the country will strive to achieve ultra-low emissions , where NOx emission concentration is not higher than 50mg / Nm 3 . In order to achieve the ultra-low NOx emission requirements of coal-fired power plants, the ammonia injection optimization adjustment of the SCR denitrification system must be carried out. Therefore, it is very necessary to obtain the NOx concentration value in the flue gas at the inlet of the SCR rea...
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Patent Timeline
Login to View More IPC IPC(8): G01N1/22G01N33/00
CPCG01N1/2258G01N1/2205G01N33/0042G01N33/0054G01N33/0037G01N33/0036G01N2001/2261
Inventor 郭茂丰杨建华金建强姚顺春任小虎卢志民张向
Owner 呼和浩特科林热电有限责任公司