Application analysis of multivariable predictive control(MPC)in regulation of hydrogen-to-carbon ratio for methanol synthesis
Taking 2.05 million t/a methanol synthesis system at China Coal Shaanxi Yulin Energy Chemical Co.,Ltd.as the research object,in view of the practical operational challenges such as the lagging in hydrogen-to-carbon ratio(H/C ratio)adjustment leading to temperature fluctuations in the synthesis tower and frequent manual interventions,a multivariable predictive control(MPC)system was introduced to mitigate these issues.Combined with the control challenges and H/C ratio influencing factors during the actual operation,the controlled variables and operational variables were determined to achieve the refined control over the methanol synthesis unit.The practical application results demonstrated that the MPC system could enhance the operational stability of the plant,improve its automation level,reduce the labor intensity during the production process,and increase the overall plant efficiency.
methanol synthesishydrogen-to-carbon ratiomultivariable predictive control(MPC)energy conservation and consumption reduction
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