Design Of The Steam-Injection Boiler Burning Pulverized Coal Control System And Study On Application Of Fuzzy Control

Steam drive oil recovery is the method in which high pressure steam withsuitable dryness fraction is injected into heavy oil stratum. Crude oil and naturegas are the main burning material of steam-injection boiler in the past. In orderto reduce the fuel cost, Many kinds of steam-injection boiler burningpulverized coal has been developed, after the project of "replace oil with coal"in our country. There are still many important condition needed to be solvedbecause of the changing of burning mode. It is based on the steam-injectionboiler burning pulverized coal Liaohe oil field. Plenty of research has beendone aim at improving automatic level of the control system.The control system of new steam-injection boiler burning pulverized coalhas been designed based on the analysis of the techniques process and status inquo in country and overseas research;This system uses stratification structure,the master and slave computer. The master performances the dada acquisitionand real-time control. The slave monitors the burning and thermal drive process.The author has finished its installation and debug. Furthermore, great deals offield data are collected during the equipment running.Steam pressure, the scale of wind and coal fuzzy control system has beendesigned based on the collected real-time data due to many variation andrandom disturbance. The constant pressure and constant flow control strategyhas been design in dryness fraction control. Moreover, the simulation result ofFuzzy control by Matlab language has been applied in practice.Dryness fraction is measured by detecting inlet water and output waterconductor analysis during the implementation of dryness fraction controlstrategy. Feedforward-feedback control technology that is good for engineeringhas been adapted to the system based on analysis of its primary effect. Goodresolution and stability has been obtained. Besides, the whole the hardware ofthe control system are achieved and some of the monitor and control softwarehas been programmed.