Alkylation reaction apparatus, reaction system, and liquid acid catalyzed alkylation reaction process

A liquid acid catalyzed alkylation reaction process, characterized in that the alkylation reaction of isobutane with a C3-C5 alkene fraction, preferably isobutane with a C4 alkene, is carried out in n reactors, the inlet temperature of the first reactor is −10° C. to 20° C., preferably −3 to 10° C.;

• In said n reactors, there are m reactors including the first reactor that are all provided with three reaction zones, namely, an x reaction zone, a y reaction zone and a z reaction zone;
• The diluted alkylation reaction raw material is distributed to said m reactors, preferably, the diluted alkylation reaction raw material is equally distributed to said m reactors, or is distributed to said m reactors in a gradually decreasing manner in the order of the reaction streams in the reactors;
• In m reactors provided with three reaction zones, the alkylation reaction stream firstly flows into the x reaction zone and then successively flows through the y reaction zone and the z reaction zone, and based on the mixing intensity, the mixing intensity of the y reaction zone>the mixing intensity of the x reaction zone>the mixing intensity of the z reaction zone, wherein n≥1 and n≥m;
• The reaction stream has a residence time in the x reaction zone of 0.01-10 seconds, a residence time in the y reaction zone of 0.01-10 seconds, and a residence time in the z reaction zone of 0.1-15 minutes.