Patent ID: 6534023
Filing Date: 2003-03-18
Classification: B01F,B01J,C01B,C02F,Y10S

Abstract:
A coaxial gas-fluid mixing tube, comprising:an outside tube formed with an upstream end and a downstream end substantially opposite to the upstream end, in which the upstream end has at least one water inlet, and the downstream end has at least one water outlet; an inside tube axially positioned within the outside tube between the upstream and downstream ends to form a flowing duct and thereby forming a liquid flowing path therebetween, the inside tube comprising a first conical tube and a second conical tube which are oppositely arranged and apart from each other to form a gas-sucking gap therebetween such that the flowing duct forms a throat which allows the flowing path to be narrowest at the gas-sucking gap, the inside tube further having a chamber formed therein which is connected to the flowing duct through the gas-sucking gap to form a gas flowing path from an exterior gas supply; a check valve provided in the chamber to allow gas to flow one way from the inside tube to the outside tube via the gas-sucking gap.