According to the
effluent pump for the
alkylation device, a gap between a
throat shaft sleeve and a
throat lining, a gap between a first-stage shell wear ring and a first-stage
impeller wear ring, a gap between an interstage shaft sleeve and an interstage lining and a gap between a
balance shaft sleeve and a balance sleeve are arranged; and gaps between the secondary shell wear ring and the secondary
impeller wear ring are modified, so that heat generated by an overflowing part can be dissipated in an accelerated manner, the situation that equipment is damaged due to the fact that a rotating part and the wear rings are heated to expand and stick to each other due to short-time flow insufficiency is effectively avoided, and meanwhile, the service life of the equipment is prolonged. And the situation that equipment is damaged due to local overheating caused by partial flow channel blockage due to too small interstage gaps of large-particle impurities carried in a medium can be avoided.