Granulation And Humidity Control Method And Its Application Based On Feedforward Compensation Strategy

Granulating process, is one of the key working procedures in sintering system, and its humidity controlling has great and direct effect on the quality of sintering. By reason of the biggish time lag in humidity measure feedback and obvious undulation in feedstock humidity control, it's difficulty for common methods to satisfy the controlling request. Thereby, advanced controlling method is needed to solve the problem.Having analyzed the controlling request of the system, this thesis brings forward a granulation humidity controlling method aiming at solving the problem of biggish time lag in it, and applies it to the granulation controlling system of air washer of Shaoguan Smelting Factory. This thesis also conceives a relay feedback controlling system model with ameliorated predictive compensatory, designs the system controller, puts up the emulation of the system controlling model, and completes the realization and application of hardware and software. At the same time, the Fluctuation Computers Controlling System, composed of electro-pneumatic valve, moisture gauge, PLC (Programmable Logic Controller—PLC) and IPC(Industrial Personal Computer—IPC), has been conceived. It has also expatiated the idiographic realizable process and method of this system, and achieved data acquisition, automatic, remote monitoring and alarming of granulation humidity by the software configuration WINCC.Through plenty of tests, this thesis proves that this system elevates the stability of humidity controlling, quality of sintering, finished product rate of sintering production, and economic benefits. And it also proves that the granulation humidity controlling method, based on the tactic of the feedforward compensation, is a successful method.