Method and device for recovering liquid substance

A device for recovering a liquid substance comprising:

• a working coil which is mountable on a liquid substance contacting member which is a member of a tank containing a liquid substance is in contact with the liquid substance contained in it or flowing through it and is made of an electric conductor;
• a high frequency inverter unit for supplying a high-frequency current to the working coil;
• and
• a recovery pipe which is connected to a pump and is adapted to be connected to the liquid substance contacting member;
• a high-frequency current being supplied from the high-frequency inverter unit to the working coil to cause the liquid substance contacting member itself to generate heat by induction heating to thereby reduce viscosity of the liquid substance, and the liquid substance being recovered through the recovery pipe by operation of the pump.

A device for recovering a liquid substance comprising:

• a pressure casing;
• a pump provided in the pressure casing;
• a high-frequency inverter unit provided in the pressure casing;
• a pipe constituting a part of a recovery route which is connected to a suction inlet side of the pump and provided in the pressure casing movably in reciprocating motion to and from outside of the pressure casing;
• a working coil which is connected to an end portion of the pipe remote from the suction inlet side of the pump and comprises a liquid substance contacting member made of a cylinder of an electric conductor and a working coil main body;
• and
• an opening cutting mechanism which is provided coaxially with the central axis of the working coil and the pipe and has cutting edges adapted to cut an opening having a size which is sufficient for the working coil to move through the opening,
• a high-frequency current being supplied from the high-frequency inverter unit to the working coil in a state where the working coil has moved inside of the opening cut by the opening cutting mechanism to cause the liquid substance contacting member itself to generate heat by induction heating and thereby reduce viscosity of the liquid substance, and the liquid substance being recovered by operation of the pump.