Online monitoring control method based on environment-friendly, energy-saving and safe cement production period

Abstract

The invention provides an online monitoring control method based on an environment-friendly, energy-saving and safe cement production period, belonging to the field of cement production. The online monitoring control method is characterized in that an online monitoring control system based on computer online monitoring and manual command control is constructed on cement production equipment, the actual measuring quantity of NOx, NH3, CO and SO2 and the coal-burning amount of a decomposing furnace are sequentially adjusted within the cement production period including the raw material mixing process, the raw material grinding and waste gas treating process, the coal dust preparation process, the raw material homogenizing process, the process of transferring the raw material into a pre-heater, the process of sectional burning of the decomposing furnace, and the process of sintering to obtain clinker based on the implementation of sectional burning and low-nitrogen oxide burner technology, so that the emission such as NOx can be comprehensively controlled, factors such as smoke channel blocking, excessively high sulfur content in coal dust, and excessively high coal consumption of the decomposing furnace, which influence the safe running and energy consumption can be controlled, and as a result, the stability of the quality of the cement can be ensured, the safety in production can be ensured, the energy is saved, and the cost is reduced.

Description

technical field [0001] The invention belongs to the field of cement production, and in particular relates to an on-line monitoring and control method for the cement production cycle based on environmental protection, energy saving and safety. Background technique [0002] The invention discloses an on-line monitoring and control method for the cement production cycle based on environmental protection, energy saving and safety, and belongs to the field of cement production. There are many types of nitrogen oxides (NOx), including nitrous oxide (N 2 O), nitric oxide (NO), nitrogen dioxide (NO 2 ), nitrogen trioxide (N 2 o 3 ), dinitrogen tetroxide (N 2 o 4 ) and dinitrogen pentoxide (N 2 o 5 ) and many other compounds, but mainly NO and NO 2 , is a common air pollutant. NOx has great damage to the environment. It is not only one of the main substances that form acid rain, but also an important substance that forms photochemical smog in the atmosphere. It consumes O 3...

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Problems solved by technology

[0007] The purpose of the present invention is to solve the problems of on-line monitoring and control of NOx and other impacts caused by the implementation of NOx emission reduction at any time after simply implementing staged combustion and LNB technology, resulting in a decrease in the stability of cement clinker production quality and excessive consumption Existing problems such as reduction of raw materials, thermal efficiency, and increase in production costs of enterprises, from the perspective of cement production cycle, including raw material batching process, raw material grinding and waste gas treatment process, coal powder preparation process, raw meal homogenization and raw meal preheating It provides an on-line monitoring and control method for the cement production cycle based on environmental protection, energy saving and safety, which is suitable for the application of segmental combustion technology in calciners, calciners and The application of LNB technology in rotary kilns is also applicable to cement production lines that use some industrial waste to replace some raw materials and fuels, so as to "reduce nitrogen oxides on the basis of ensuring stable cement production, and not bring too many other additional resources. , energy consumption and pollutant discharge" as the principle, and the central control computer has a memory function for each control operation, so as to avoid the decline in the stability of cement production caused by excessive regulation and control, and has the advantages of environmental protection, resource and energy conservation, investment and Low operating cost and other advantages

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