Combustion optimizing control system of circulating fluidized bed boiler in wide-range change of load

A circulating fluidized bed and boiler combustion technology, which is used in fluidized bed combustion equipment, control systems, and fuels burned in a molten state to maintain pressure, improve commissioning rates, and avoid disturbances.

Inactive Publication Date: 2011-09-14
北京三博中自科技有限公司
View PDF5 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing technology cannot solve the problems of ensuring the safety and economy of the circulating fluidized bed combustio

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Combustion optimizing control system of circulating fluidized bed boiler in wide-range change of load
  • Combustion optimizing control system of circulating fluidized bed boiler in wide-range change of load
  • Combustion optimizing control system of circulating fluidized bed boiler in wide-range change of load

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0028] The present invention will be described below in conjunction with the accompanying drawings.

[0029] likefigure 1 As shown, the circulating fluidized bed boiler combustion optimization control system of the present invention includes a DCS system 1, an optimization controller 2, an expert logic judgment circuit 3, a combustion dynamic correction system 4 and a human-computer interaction module 5, wherein the optimization controller 2 includes a furnace Negative pressure regulation circuit 21, boiler load regulation circuit 22 and furnace material distribution estimator 23, wherein boiler load regulation circuit 22 also includes material layer temperature regulation circuit 221, steam pressure regulation circuit 222, flue gas oxygen and sulfur content regulation circuit 223. DCS system 1 is an industrial process control system, which is used to collect measurement signals of process data in circulating fluidized bed boilers, and input these measurement signals into opti...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a combustion optimizing control system of a circulating fluidized bed boiler in wide-range change of load. An optimizing controller comprises a boiler load adjusting loop and an in-boiler material distribution estimator, wherein the boiler load adjusting loop outputs a primary air quantity calculated value, a secondary air quantity calculated value and a fuel quantity calculated value to the in-boiler material distribution estimator; the in-boiler material distribution estimator outputs a material layer thickness judging result to an expert logic judging circuit; and the expert logic judging circuit outputs a final controlled quantity to a distributed control system (DCS) according to the input material layer thickness judging result and the measuring signal of process data, and inputs a temporary bed temperature modified value and a temporary secondary air modified value to the boiler load adjusting loop. In the invention, according to the characteristics of multiple variables, close coupling, large pure delay, time varying and the like of the combustion system of the circulating fluidized bed boiler, an in-boiler kinetic model is arranged in the in-boiler material distribution estimator, and the in-boiler kinetic model and the expert logic judging circuit are combined to estimate the quantity of material and carbon concentration of all parts so as to correct the air-coal ratio dynamically.

Description

technical field [0001] The invention relates to an optimization control system, in particular to a combustion optimization control system of a circulating fluidized bed boiler under a large range of load fluctuations. Background technique [0002] Circulating fluidized bed combustion boilers have developed rapidly in the past ten years because of their high efficiency, low pollution, and wide fuel adaptability. The combustion system of the circulating fluidized bed boiler reflects the structural characteristics of the circulating fluidized bed more concentratedly, and its combustion chamber is quite different from the furnace of the conventional pulverized coal boiler. A typical circulating fluidized bed boiler is divided into upper and lower parts. The upper part of the combustion chamber is the oxidation combustion zone, and the lower part is mainly the reduction combustion and sulfur fixation zone. It is composed of separation device, feeder and other parts. The combust...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): F23C10/28F22B35/00
Inventor 胡乐魏志王平
Owner 北京三博中自科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap