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Methanol Plant Control Scheme by Taking Natural Gas as

Methanol Plant Control Scheme by Taking Natural Gas as

An improper control scheme was used for the control valve (HV24115) shown in the flow diagram in Fig. 16, which led to rapid opening and closing of the valve and resulted in rapid temperature changes of the reboiler. The temperature change of the reboiler gas outlet (TV24112) was more than 100&F (56&C)/min, and more than 180&F (100&C) over ...

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