Abstract: A mixing apparatus (10A) comprises a tubular mixing section (1) for mixing a combustible gas and a combustion supporting gas; a combustible gas supply port at one end (1a); a combustible gas transport device (3) for supplying the combustible gas into the tubular mixing section (1) from the combustible gas supply port; a mixed gas outlet port of the combustible gas and the combustion supporting gas at the other end (1b); and a combustion supporting gas supply tube (5) connected to the tubular mixing section (1) between the one end (1a) and the other end (1b) for supplying the combustion supporting gas into the tubular mixing section (1) from a combustion supporting gas supply port (5a). The combustible gas transport device (3) can control a flow velocity of the combustible gas at the combustion supporting gas supply port (5a) not less than a combustion velocity of the mixed gas.

Abstract: A mixer (10) for mixing a combustible gas and a combustion supporting gas comprises a tubular mixing section (1) which extends between one end (1a) having a combustible gas supply port (2) and the other end (1b) having a mixed gas discharge port (3); and a combustion supporting gas supply tube (4) which is inserted into the tubular mixing section (1) between the one end (1a) and the other end (1b) of the tubular mixing section (1) and has a combustion supporting gas supply port (5) at its tip (4a) to open towards the other end (1b) of the tubular mixing section (1). A juxta-tip part (4b) of the combustion supporting gas supply tube (4) has an outer shape tapered towards the combustion supporting gas supply port (5) at the tip (4a).

Abstract: A mixer (10) for mixing a combustible gas and a combustion supporting gas comprises a tubular mixing section (1) which extends between one end (1a) having a combustible gas supply port (2) and the other end (1b) having a mixed gas discharge port (3); and a combustion supporting gas supply tube (4) which is inserted into the tubular mixing section (1) between the one end (1a) and the other end (1b) of the tubular mixing section (1), is closed at its tip (4a), and has at least one combustion supporting gas supply port at its juxta-tip lateral part (4b). A central axis of the combustion supporting gas supply tube (4) at the juxta-tip lateral part (4b) is generally parallel to a longitudinal direction of the tubular mixing section (1).

Abstract: The present invention provides a method for detecting abnormality in a process for exchanging heat between a heating medium and a process fluid comprising the step of: detecting a gaseous component at a gas phase in a flow path of the heating medium, wherein the gaseous component is generated by contact of the heating medium with the process fluid. This method can promptly detect a leakage of the process fluid in a process for exchanging heat between a heating medium and a process fluid.