FIELD: wood-pulp and paper industry. SUBSTANCE: pump is provided with changeable pipe union where screw feeder is coaxially located and check valve mounted on side of pulp outlet. Pump is also provided with mixing chamber for mixing the pulp with carrier agent; mixing chamber is connected with pipe union and is provided with device for supply of carrier agent. Adjustable clearance is provided between end of screw feeder and check valve. Air evacuation device is made in form of last turn of screw feeder having width of 0.2-1.0 mm and length not exceeding last turn of screw feeder; total area of passage section ranges from 0.5S to S, where S is difference between planes of inner section of pipe union and section of screw feeder rod. EFFECT: enhanced reliability. 2 dwg
