Method and system for optimizing and controlling combustion performance of circulating fluidized bed boiler in real time

A circulating fluidized bed and fluidized bed boiler technology, applied in the field of boilers, can solve problems such as inability to reliably guarantee, reduce bed temperature, and pressure deviation between two beds, and achieve reliable implementation, improve overall performance, and improve safety. Effect
CN105020705AActive Publication Date: 2015-11-04INNER MONGOLIA RUITE TECH
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
INNER MONGOLIA RUITE TECH
Publication Date
2015-11-04

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Patent Text Reader

Abstract

The invention provides a method and system for optimizing and controlling combustion performance of a circulating fluidized bed boiler in real time. The method for optimizing and controlling combustion performance of the circulating fluidized bed boiler in real time includes the steps that based on historical data of combustion of the boiler, a first neural network used for being matched with a nonlinear mapping relation between the input and the output of an existing fluidized bed boiler system is established; according to the first neural network, the adjustable input variable of the input of the fluidized bed boiler system is determined; and the adjustable input variable serves as the bottom layer control input, the trends of corresponding deviation and the deviation change rate are calculated, and a second neural network is established for training and acquiring the process variable control output. By the adoption of the method and system, the boiler efficiency is improved, the power supply coal consumption is lowered, coking and slag bonding are prevented or treated, NOx emission is reduced, and the safety, the reliability and the economical efficiency of operation of the boiler are further improved.
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Description

technical field

[0001] The invention relates to the technical field of boilers, in particular to a real-time optimization control method and system for combustion performance of a circulating fluidized bed boiler (CFB). Background technique

[0002] Circulating fluidized bed boiler is an important thermal equipment in my country, with a large amount of use and a wide distribution area. However, the fluidized bed boiler is a multi-variable control object, and the controlled variable has the characteristics of nonlinearity, time-varying, large delay and strong coupling. It is difficult to establish a more accurate and practical mathematical model, and it is difficult to achieve it with conventional PID control. Ideal control effect, so the automation degree of CFB boiler operation is generally not high at present. For a long time, boiler operation has relied on experience design, and the air distribution is often adjusted by the boiler operator according to experience. There i...

Claims

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