Coal-fired power plant ammonia spraying control method based on big data analysis, and denitrating system

Abstract

The invention discloses a coal-fired power plant intelligent ammonia spraying control method based on big data analysis. According to the method, by real-timely monitoring the fuel quality, the powdering working condition, the boiler air distribution working condition, the unit load and the CEMS operating working condition, the coal quality coefficient K1, the differential output yield value k ofthe actual coal firing amount, the correction factor K2 of the boiler air distribution working condition to the ammonia spraying amount, the correction factor alpha of the unit load to the ammonia spraying amount, and the correction factor K3 of CEMS to the ammonia spraying amount are fed back, and an ammonia spraying system is comprehensively analyzed and controlled. Based on big data analysis ofa boiler combustion system, through big data statistics and analysis of fuel quality judgment, combustion air distribution monitoring, working condition prejudgment caused by increasing, decreasing or switching of coal mills, unit load monitoring and CEMS operating working condition monitoring, prejudgment is conducted in advance, fine configuration and intelligent control over the ammonia spraying system are achieved, and the situation that over-spray of a reductant, namely ammonia occurs, and thus air preheater and catalyst blocking is caused is avoided.

Description

technical field [0001] The invention relates to a method for intelligently controlling ammonia injection in a coal-fired power station based on big data analysis, which belongs to the electric power industry. Background technique [0002] With the comprehensive promotion of ultra-low emission requirements for coal-fired power plants and the implementation of the pollutant discharge permit system, denitrification facilities have become one of the key facilities to achieve ultra-low emission of flue gas pollutants. In recent years, my country's coal-fired units are facing new situations such as deep peak shaving and complex and changeable coal quality. Through the evaluation of the operation status of denitrification facilities in coal-fired power plants, it is found that there are some common problems in the ultra-low emission transformation and operation of denitrification facilities. First, in order to meet the ultra-low emission requirements, the amount of ammonia injectio...

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Problems solved by technology

For example, setting the interception net on different slopes can effectively reduce the impact of large particles of ash on the screen, but the interception net is covered on the frame, and the relationship between wear and flue gas flow rate is positive cubic, and local blockage will lead to local The flow velocity increases several times, causing damage to the interception net and shortening its life

Or in order to reduce the wear and tear of the

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