Method for estimating activity of catalyst in denitration device of coal-fired boiler

A denitration catalyst, a technology for coal-fired boilers, applied in chemical instruments and methods, separation methods, chemical property prediction, etc. The effect of reducing production costs

Active Publication Date: 2016-08-24
上海电气电站环保工程有限公司 +1
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Problems solved by technology

However, the test device has disadvantages such as large gas consumption, long measurement time, and high test cost.

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  • Method for estimating activity of catalyst in denitration device of coal-fired boiler
  • Method for estimating activity of catalyst in denitration device of coal-fired boiler
  • Method for estimating activity of catalyst in denitration device of coal-fired boiler

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[0047] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0048] Such as figure 1 and figure 2 As shown, the improved denitrification device used for catalyst activity estimation in the present invention includes: denitrifier 10, mixer 6, liquid ammonia storage tank 9, ammonia buffer tank 7, liquid ammonia evaporation tank 8, denitrifier 10 and mixer 6 are connected, the mixer 6 is connected with the ammonia buffer tank 7, the ammonia buffer tank 7 is connected with the liquid ammonia evaporation tank 8, and the liquid ammonia evaporation tank 8 is con...

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Abstract

The invention provides a method for estimating activity of a catalyst in a denitration device of a coal-fired boiler. The method is characterized in that in the activity estimation process, the online operation parameters and data of a data collecting system are utilized, the catalyst periodic test data and the denitration process and structure parameters are combined, a chemical reaction model in the denitration process is used for estimating the denitration efficiency, and the activity of the denitration catalyst is estimated according to the denitration efficiency; if the activity of the catalyst is in the activity deactivating area (about 50%), a catalyst replacement plan is considered; for the catalyst replacement plan, the local catalyst activity condition is obtained according to the nitrogen oxide concentration distribution estimation, ammonia spraying accumulation computing, design parameters of a denitration system, and equivalent methods, and a to-be-replaced area is determined. A local replacement plan for the catalyst activity estimation model is favorable for improving the utilization efficiency of the catalyst, the cost is reduced, and the service life of the denitration catalyst of a thermal power plant is prolonged.

Description

technical field [0001] The invention relates to a method for estimating catalyst activity in a denitrification device of a coal-fired boiler, belonging to the field of boiler thermal parameter measurement. Background technique [0002] Denitrification is to reduce NO x main means of emissions. At present, the proportion of flue gas denitrification in my country's thermal power units is not high. Selective catalytic reduction (SCR) is the mainstream process for flue gas denitrification in coal-fired power plants. SCR denitration technology and SCR denitration catalyst originated in Japan in the 1970s and began to be put into commercial use. They were transferred to Europe and the United States in the 1980s, and have been further developed and applied. Now they have become a A mature, reliable, solution to NO x The best technology for emissions. my country started relatively late in the research of SCR denitrification technology. It was only in 2006 that the localization ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00B01D53/90B01D53/56
CPCB01D53/8628B01D53/90B01D2255/9022G16C20/30
Inventor 丁承刚王景成陆晶石伟晶郭士义胡霆陆良樑黄晓莹王博辉罗华毅王鸿源袁景淇
Owner 上海电气电站环保工程有限公司
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