Method for optimizing and diagnosing circulating fluid bed boiler combustion

Abstract

The invention relates to a circulating fluidized bed boiler combustion optimization and diagnosis method for acquiring and sorting out operation data such as bed temperature, bed pressure, load, efficiency, coal supply amount, limestone supply amount, primary air volume, primary wind pressure, upper secondary air volume and wind pressure, lower secondary air volume and wind pressure, oxygen content, induced air volume, slagging amount, NOx, Sox, etc., to build a neural network model as the basis for optimization adjustment and diagnosis. Field data of design value, measured value during operation, fuel chemistry assay value and etc. of the circulating fluidized bed boiler are utilized as the basis for optimization adjustment and diagnosis to calculate boiler efficiency as the basis for optimization adjustment and diagnosis; a judgment criterion for the optimization adjustment of combustion work condition is established and a corresponding solution is proposed, and therefore, optimization adjustment can be carried out when the circulating fluidized bed boiler deviates from the optimum combustion work condition; a judgment criterion for abnormal operation is established and a solution thereof is proposed; and therefore, problems which can not be solved after optimization adjustment can be diagnosed and analyzed. Common accident phenomena are summarized and processing strategies can be proposed, and therefore, guidance can be provided to accident handling.

Description

technical field [0001] The invention belongs to the field of thermal power engineering and automatic control, and is a set of methods for realizing modeling identification, efficiency calculation, combustion optimization, operation guidance, abnormal diagnosis, and accident guidance of CFB boilers in power plants. The invention can effectively improve the safety of CFB boiler operation Sex, economy and quality of control. Background technique [0002] Circulating fluidized bed combustion technology is an efficient and clean coal-fired power generation technology. Its unique advantages are mature combustion technology, simple fuel preparation system, good fuel adaptability, high combustion efficiency, good load regulation performance, and low pollution emissions. Occupy a place in the power industry. [0003] However, at present, my country's technology in the design, manufacture, installation, commissioning and operation of circulating fluidized bed boilers is still immatur...

AI Technical Summary

Problems solved by technology

Compared with pulverized coal boilers, circulating fluidized bed boilers have relatively imperfect operating procedures. In this case, once an abnormality occurs on site, it will be difficult for the operating personnel to deal with it in time, which will inevitably cause certain economic losses and even production. ACCIDENT

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