Soft-sensing Modeling Of Methanol Production And Its Design Optimization

In the research the on-line measuring technology of the500000ton methanol synthesisplant and the optimization of synthesis conversion are discussed. Methanol synthesis processoccupies an important position in the methanol production. The single pass conversion ofsyngas is measured on line by soft-sensing method. The real-time data is transfered to theoperator timely and accurately. Then the operating parameters are adjusted to increase devicesynthesis rate, save energy and stabilize production.Methanol production unit with an annual production capacity of500000ton uses highsulfur coal as the main raw material and DCS system of ABB Corp as controlsystem.Synthesis process is the second important procedure and the equipment is one of thekey units. The process uses the purified gas mixture of CO, CO2and H2as the raw materialsfor methanol production. The syngas conversion can be measured by off-line method but itcosts a lot of time. So the on-line measure method of syngas single pass conversion is helpfulfor the operator to master the status of the device operation and optimize the operation.In order to optimize methanol production unit the online operating optimization softwarewas explored using the OPC Interface to read data. And this software has been used in the500000ton methanol production unit.The background program of the methanol production optimization software is writtenwith Visual c++programming platform and the man-machine operation interface is designedby Kingview software. The on-line measurement of synthesis conversion of methanolsynthesis unit and the calculation of operating parameters can be obtained by the software.And these results can be displayed online by man-machine interface.