Selection of control system for fixed-bed batch gas generator?
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Selection of control system for fixed-bed batch gas generator? The well-known domestic companies include: Hebei Delong > Changsha Yifeng > Zhongkong > Zhongzi > Anhui Sanyuan. Delong uses Siemens PLC technology, offering highly comprehensive functions; a follow-up visit will be conducted after one year. Yifeng has developed its own technology, offering reasonable functionality at an appropriate price. Anhui Sanyuan, developed independently and using microcontroller technology, has a slow response time; it can only be connected to one computer, and multiple computers cannot be interconnected for monitoring. Steam regulation is very unstable. The configuration software is manually programmed in Delphi, resulting in an unattractive interface, and users are not able to add instruments as they wish. There was poor hardware contact, which caused problems, and the staff did not handle it on-site in a timely manner. Later maintenance costs are extremely high, and spare parts are not interchangeable. Finally, it is also worth mentioning Zhongkong and Zoomlion DCS; among the two, Zhongkong offers better hardware, while Zoomlion provides more enthusiastic service. These are basically the choices available for medium-sized nitrogen fertilizer companies.
The optimal control of fixed-bed batch gas generation furnaces developed by Hebei Delong, Changsha Yifeng, and Anhui Sanyuan are all forms of exploration; the optimization methods used vary, and each has its own limitations. Their hardware is based on microcontroller technology (perhaps as a form of technical protection). However, since the same type of coal cannot be used in enterprises and process operations vary greatly, these control systems inevitably make errors, leading to a deterioration in furnace conditions. We have used the products from those three companies, but we phased them out one after another. Therefore, we believe that integrating the operational experience of the factory into the DCS system as a means of controlling gas production, and collaborating with the DCS manufacturer to continuously develop control software packages, is essential for implementing advanced control.
What was said on the second floor makes sense; currently, intermittent gas generators are being phased out due to coal prices and technological factors. Using a proper DCS is the only real solution.