The Analysis Research Of Control System Of The Full-hydrogen Bell-type Annealing Furnace

The full-hydrogen bell-type annealing furnace is important equipment in cold-rolled coils, for it uses pure hydrogen gas as protect gas, and it makes annealing coil have relatively smooth surface and enhance the heat transfer efficiency. Cold-rolled steel coils in the cold-rolled process will produce a hardening phenomenon, and its texture is hard and brittle. The internal coil rearranged to remove cold stress after recrystallization annealing, and be suitable for manufacture.Currently, the full-hydrogen bell-type annealing furnace represents the most advanced annealing technology, unlike the traditional hood-type heaters, nitrogen and hydrogen bell-type heaters, its equipment structure, sealing characteristics, such as the composition of protection gas and the degree of automation has obviously improved In order to meet the annealing steel products varieties of high-quality, the traditional hood-type heaters, nitrogen and hydrogen bell-type heaters are unable to do as much. Therefore, enterprises must change still existed old batch furnace operations to the full-hydrogen bell-type annealing furnace to meet production needs.China has introduced lots of expensive foreign hydrogen annealing equipment and related control technology in recent years. However, due to intellectual property and confidentiality, the technology introduced can't be used for other bell-type heaters transformation, unless abroad equipment companies spend lots of money operating. Therefore, Wuhan Iron and Steel Group cooperate with our group to digest and absorb the introduced technology from EBNER Company, thus forming a complete set of technologies to apply to existed nitrogen and hydrogen bell-type heaters.Topic is the model-based methods study of Hydrogen Bell-type heaters adaptive control technology. Based on Hydrogen Bell-type furnace heat transfer model, and the application of simulation technology, Offline forecast to achieve a coil annealing process system functions; Then the annealing process in the whole system of hydrogen Bell-type furnace control system and the implementation mechanism in the control system into the process of signal transmission, while the annealing process of dielectric simple process flow analysis, to exploit the annealing process control functions are achieved; Finally, the Hydrogen Bell-type furnace control system analysis, through this part of the study and master the hood-type furnace control system characteristics, control style, structure, function and temperature control strategy. Based on the above work, ultimately forming a complete set of full hydrogen batch annealing technology, for the transformation of the factory's production to provide adequate technical support and research base.