Four Nozzles Mounted The Gasifier Security System Design And Realization

The new opposed four-nozzles gasifie which was developed jointly by Yankuang Group and the EAST CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY is the only available independent intellectual property rights currently, while both the ability and experience of industrialization of advanced coal gasification plant a row, but also the domestic large-scale coal chemical equipment, localization of the core device, fully equipped with international advanced continuous coal gasification plant——Texaco coal slurry gasifier, SHELL coal gasifier such as the ability to compete..The device has a flammable and explosive, high temperature (1350℃) high-voltage (6MPa) typical of high-risk characteristics of the coal chemical industry. Opposed four-nozzles gasifier control system and the Texaco gasifier compare, the scale is bigger, the request is higher. The feeding system has two sets of independent safety PLC control technology. Each pair of burners in the coal slurry and oxygen to balance the distribution of demand, are even stricter to control system's stable request.This design is mainly aims at the logical diagram which the design institute provides to carry on the design to satisfy the scene request the safety system. My factory this project Emergency Shutdown Device(ESD) selects GE Corporation's GMR system, the use ladder diagram programming completes the technological requirement and each kind of function The major function realizes: according to is suitable controls drives, guaranteed that the oxygen and the coal slurry enter the order; the oxygen and the coal slurry to enter the amount to meet the technological requirement; according to request elimination measuring appliance influence safety system's steady operation; before Startup ,promptly carries on to the oxygen pipeline blows sweeps achieves when the batch feeding the security; when Shutdown promptly carries on to the coal slurry and the oxygen pipeline blows sweeps and so on a series of questions. According to fault analysis's need, realizes the first accident warning, according to the warning timely analysis Analyze the cause of the malfunction and point of failure. This logic has provided the powerful safeguard for the new gasifier's long period steady operation.