Method for optimizing and diagnosing circulating fluid bed boiler combustion
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A circulating fluidized bed and boiler combustion technology, applied in the direction of instruments, adaptive control, electrical testing/monitoring, etc., can solve problems such as economic losses, imperfect operating procedures, production accidents, etc.
Inactive Publication Date: 2008-12-24
SOUTHEAST UNIV
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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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[0117] In the present invention, firstly, the operating data of the circulating fluidized bed boiler system are collected and sorted out, and an artificial neural network model is established in which the operating data are mutually restricted.
[0118] Secondly, the present invention adopts the anti-balance algorithm of GB10184-88 to calculate the furnace efficiency, and the data sources are manual input of laboratory test values, field measured values and boiler design values, etc., which are used as important characteristic parameters to evaluate the operation status of the boiler.
[0119] The control principle and strategy that the present invention mainly adopts are specifically set forth as follows:
[0120] The combustion optimization module of the present invention summarizes the various experiences and data in the actual operation and control of the circulating fluidized bed boiler according to the established mathematical model of the circulating fluidized bed boil...
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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...
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