To reduce abrasion, reduce the frequency of repair, and improve operating efficiency by injecting gas in a carrying pipe extending direction to a carrying chamber formed vertically downward a rotor composing a plurality of rotor chambers by a plurality of rotor plates extended from a hollow shaft radially, a rotor wall, and a rotor cylinder.
In a rotor 8, four rotor plates 10 are arranged from a hollow shaft 9 radially, both ends of the rotor plates 10 are shield by two rotor walls, a rotor cylinder having a circular cross section is brought into contact with the outer periphery of four rotor plates 10, and an opening 13 is drilled between adjacent rotors 10, 10 in the rotor cylinder. Slurry fed from a carrying inlet 2 is carried from the opening 13 into each of rotor chambers A to D, it is transferred to a carrying chamber by rotation of the rotor, and air injected from an injection nozzle toward a carrying pipe direction in the carrying chamber is moved inside of the carrying pipe by its pressure. It is thus possible to ensure very large strength, reduce the friction so as to extend the life, and simplify maintenance.