PURPOSE: To reduce mechanical strength and weight in the above fore feed device for sludge and so on using reciprocating motion of a piston by constitut ing it so that compressed gas is intermittently supplied to a transport pipe.
CONSTITUTION: A piston 5 is reciprocally moved in a cylinder chamber 4 pro vided at the lower part of a slurry tank 1 so as to suck a slurry 2 in the slurry tank 1 into the cylinder chamber 4, and it is extruded into a transport pipe 8 and force fed to a discharge port 9 intermittently. At the same time, com pressed air is intermittently supplied to the transport pipe 8 from a compressed air tank 21 through a control valve 22. By this, flow resistance of the slurry 2 in the transport pipe 8 is reduced and the slurry can be forcibly fed with a low pressure.
SAKAI KENJI
YOSHIDA MASAMI
