scholarly journals Study on the coordinated control of the bed temperature and the main steam pressure in the circulating fluidized bed boiler

2017 ◽  
Author(s):  
Peng-Yuan Zhou ◽  
Pu Han
Keyword(s):  
Fluidized Bed ◽  
Circulating Fluidized Bed ◽  
Coordinated Control ◽  
Steam Pressure ◽  
Circulating Fluidized Bed Boiler ◽  
Bed Temperature ◽  
Main Steam

The Study on the Fuzzy Control Algorithm for Main Steam Pressure Control of Circulated Fluidized Bed Boiler

2011 ◽  
Vol 383-390 ◽  
pp. 2092-2096
Author(s):  
Zhong Jie Wang ◽  
Ning Han ◽  
Jia Wang
Keyword(s):  
Control System ◽  
Vapor Pressure ◽  
Fluidized Bed ◽  
Circulating Fluidized Bed ◽  
Fuzzy Controller ◽  
Steam Pressure ◽  
Cascade Control ◽  
Circulating Fluidized Bed Boiler ◽  
Main Steam ◽  
Cascade Control System

The main steam Pressure is one of the most important guidelines on Circulating Fluidized Bed Boiler (CFBB) operation quality and an important part in control system of CFBB. However, It is very difficult to establish the exact mathematical models of controlled objects because the combustion system of circulating fluidized bed boiler is an object that has many features: distributed parameters, nonlinear, time-varying and long time-delaying. it is unfavorable to control it with traditional controller. Therefore , In this paper fuzzy controller is used in controlling main vapor pressure systems of CFBB, and the fuzzy cascade control system is designed. In computer simulation, the fuzzy cascade control system exert stably, and has perfect control effect to main vapor pressure systems of CFBB.

Lignite-Fired CFB Boiler SO2, NO Emission Control Technology Research

2014 ◽  
Vol 989-994 ◽  
pp. 256-259
Author(s):  
Jian Meng Yang ◽  
Bi Zheng Wang ◽  
Wei Wang
Keyword(s):  
Fluidized Bed ◽  
Circulating Fluidized Bed ◽  
Emission Control ◽  
Emission Characteristics ◽  
Control Technology ◽  
Technology Research ◽  
Circulating Fluidized Bed Boiler ◽  
No Emission ◽  
Cfb Boiler ◽  
Bed Temperature

For study on SO2 and NO emission characteristics of circulating fluidized bed boiler experiments were carried out in a 300MW circulating fluidized bed boiler. In these experiments, the variables were the amount of limestone and bed temperature. While conducting the test, the reasons for the changes in emission were analyzed, and some advices about combustion adjustment were proposed.

Experimental Study on Technical Difficulties of Botswana First Circulating Fluidized Bed Boiler during Loading Process

2013 ◽  
Vol 721 ◽  
pp. 357-362
Author(s):  
Guang Zeng ◽  
Sen Lin Zhao ◽  
Lai Wei ◽  
Run Ze Huang ◽  
Modiri Badirwang
Keyword(s):  
Fluidized Bed ◽  
Influencing Factors ◽  
Circulating Fluidized Bed ◽  
Stable Operation ◽  
Circulating Fluidized Bed Boiler ◽  
Cfb Boiler ◽  
Full Load ◽  
Loading Process ◽  
Bed Temperature ◽  
Boiler Operation

For study of technical difficulties that make Botswana first CFB (Circulating Fluidized Bed) boiler can’t reach full load at beginning of loading process, first experiments were carried out as awful experimental cases to analyze influencing factors; Second experiments were carried out as tentative experimental cases to select useful solutions; Third experiments were carried out as targeted experimental cases to execute chose solutions. Results indicate that one prominent difficulty during CFB boiler reaching full load is that boiler operation bed temperature was too high which was a comprehensive effect with some other influencing factors. CFB boiler bed temperature MFT (Main Fuel Trip) set point slight increasing, grain size changing of both start-up material and feeding coal, limestone injecting, fluidizing air of seal pot and FBHE appropriate controlling and FBHE (Fluid Bed Heat Exchanger) gradually start working are taken simultaneously, all these effective solutions solve the technical difficulties and accelerate the boiler reach full load, but attentions still need to be paid for the boiler stable operation permanently in future.

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