Daqing Refining aims at increasing the cyanide content of distillate products from acetonitrile plants. The QC Quality Research Group was established. The Causality Diagram was used to find out the reason for the high level of propionitrile in the acetonitrile plant distillate export products, which ultimately improved the product purity.
The tackling team installed a quality management electronic monitoring system in the main control room to divide the process operation indicators into three levels A, B, and C, and set the upper and lower limits of operation for each process indicator on the DCS computer operation screen. Once exceeded, there will be a red zone alarm, urge employees to immediately adjust the operation. Technicians can also access the trend curve of the operation curve at any time on the computer, randomly check the operation status and implement 24-hour monitoring. Up to now, the company's acetonitrile unit has achieved a steady rate of 99.97%.
The tackling team installed a quality management electronic monitoring system in the main control room to divide the process operation indicators into three levels A, B, and C, and set the upper and lower limits of operation for each process indicator on the DCS computer operation screen. Once exceeded, there will be a red zone alarm, urge employees to immediately adjust the operation. Technicians can also access the trend curve of the operation curve at any time on the computer, randomly check the operation status and implement 24-hour monitoring. Up to now, the company's acetonitrile unit has achieved a steady rate of 99.97%.
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