Automatic regulating system for combustion process of circulating fluid bed in boiler

A circulating fluidized bed and boiler combustion technology, which is applied in the direction of fluidized bed combustion equipment, fuel for combustion in a molten state, combustion methods, etc., can solve the problem of starting point of analysis, deviation of key points, disorder of the adjustment system circuit, automatic adjustment can only Problems running in a localized, stable environment, etc.

Inactive Publication Date: 2004-03-10
BEIJING HOLLYSYS
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Problems solved by technology

It is difficult to establish mathematical models and transfer functions at the current level of technology
[0006] Traditional circulating fluidized bed boiler combustion control strategy adopts one-sided method such as one adjustment parameter controls one adjusted parameter or two adjustment parameters controls one adjusted parameter, etc. to adjust the bed temperature", so that the automatic adjustment can only operate in a localized and stable environment
If the external dist...

Method used

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  • Automatic regulating system for combustion process of circulating fluid bed in boiler
  • Automatic regulating system for combustion process of circulating fluid bed in boiler
  • Automatic regulating system for combustion process of circulating fluid bed in boiler

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Embodiment Construction

[0024] During on-site adjustment, when an adjusted variable changes, because the adjusted variable is coupled, one or several adjusted variables must be adjusted from the system point of view to realize the adjustment. It is difficult to judge which adjusted variable occupies the main location. Therefore, in the present invention, instead of using the adjusted quantity as the name and main focus of the control loop, the adjusted quantity is used as the name and main focus of the control loop to meet the on-site adjustment requirements and comply with operating habits. Accordingly, the combustion automatic adjustment system of the present invention includes: a slag discharge adjustment circuit, a primary air volume adjustment circuit, a coal feeding adjustment circuit, a secondary air volume adjustment circuit, and an induced air volume adjustment circuit. In order to adapt to the complexity and diversity of the process and solve the difficulty of adjusting control variables, e...

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Abstract

An automatic regulation system for the combustion of circulating fluidized-bed boiler (CFBB) features that it has several regulation loops for the discharged cinder quantity, primary blowing rate, supplied coal quantity, secondary blowing rate and draught air volume, which are based on the coordination between fluidizing, combustion and heat exchange, the expert system, fuzzy control and composite cascaded PI regulation are combined, and the protecting tactics such as override protection, output restriction and lock distribution choosing and tracking are used.

Description

technical field [0001] The invention relates to an automatic adjustment system for the industrial process of solid fuel and air reaction combustion, especially an automatic adjustment system for circulating fluidized bed boiler combustion. Background technique [0002] Circulating fluidized bed boiler (CFBB) combustion technology is a coal-fired technology developed in the past 20 years. It has outstanding advantages such as wide fuel adaptability, high combustion efficiency, environmental protection (low nitrogen oxide emission, desulfurization), large load regulation ratio and fast load regulation. [0003] Generally, circulating fluidized bed boilers include wind panels, furnaces, separators, feeding devices, coal feeders, superheaters, water walls, induced draft fans, primary fans, secondary fans, high-pressure fan drums and other components, of which the furnace has Coal feed inlet, limestone feed inlet, primary air inlet, secondary air inlet, slag discharge outlet, ma...

Claims

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Application Information

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IPC IPC(8): F23C10/28
Inventor 张小辉郭敏
Owner BEIJING HOLLYSYS
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