Patent ID: 8052833

Claim:
A chemical treatment apparatus comprising an inner bath ( 20 ) having an intake port and a discharge port; an outer bath ( 10 ) having a discharge port, configured to receive overflowing liquid from the inner bath ( 20 ); a circulation system ( 30 ), including a treatment module ( 31 ) having a pump ( 311 ), a first transport pipe ( 32 ) connecting the discharge port of the outer bath ( 10 ) and the pump ( 311 ) of the treatment module ( 31 ), and a second transport pipe ( 33 ) connecting the intake port of the inner bath ( 20 ) and the pump of the treatment module ( 31 ); and a draining system ( 40 ), having a first draining pipe ( 41 ) in connection with the discharge port of the inner bath ( 20 ), a second draining pipe in connection with the treatment module ( 31 ), and a connecting pipe ( 43 ) connecting the first transport pipe ( 32 ) and the first draining pipe ( 41 ); wherein the first and the second transport pipes selectively establish a circulation path, wherein the first transport pipe and the connection pipe selectively establish a discharge path with the first and the second draining pipes; wherein both the circulation and the discharge paths are pressurizable by the pump of the treatment module.