The invention relates to a
methanol-to-
gasoline combined production technology, and belongs to an important link of a
coal-preparing high-
clean energy technology. The technology includes the steps:
methanol is heated, then a great part of the
methanol enters a
dimethyl ether reactor, is subjected to crude
dehydration, then enters a
gasoline transformation reactor and is further dehydrated, and the product passes through a
heat exchanger and then is subjected to oil-water separation; crude
gasoline is separated to obtain
dry gas through a deethanizer; a part of the
dry gas is subjected to heat exchange through the
heat exchanger, then enters a circulation compressor and together with a
dimethyl ether reactor outlet product enters a conversion reactor, so as to achieve the temperature dropping and control purposes; the gasoline having the
dry gas removed enters a debutanizer, and removed liquefied gas and the other part of methanol steam undergo a superimposed etherification reaction; crude gasoline
coming out of the debutanizer is separated to obtain the product gasoline and heavy oil by a gasoline separation
tower; the heavy oil and the other part of the dry gas
coming out of the deethanizer are together modified by a
transalkylation catalyst to obtain a gasoline component, dry gas and liquefied gas.