NOVELTY - A generating furnace (G1) comprises gasifying furnace and carbonizing chamber, where top part of cylindrical hearth of gasifying furnace is provided with material and gas feeding port. The lower side stretches to outlet of conical bottom of gasifying furnace by grate of gasifying furnace. The carbonizing chamber surrounds hearth of gasifying furnace, and upper side is provided with material inlet while lower side is provided with annular conical body connected with conical bottom of gasifying furnace. The outlet of conical bottom of gasifying furnace is embedded in the gas collection ring.    USE - Generating furnace (G1) for co-production of biomass gas, carbon and liquid.    ADVANTAGE - The furnace (F1) improves thermal value and quality of fuel gas, increases additive value of product and reduces discharge of secondary pollution.    DETAILED DESCRIPTION - Generating furnace (G1) comprises gasifying furnace and carbonizing chamber, where top part of cylindrical hearth of gasifying furnace is provided with material and gas feeding port. The lower side stretches to outlet of conical bottom of gasifying furnace by grate of gasifying furnace. The carbonizing chamber surrounds hearth of gasifying furnace, and upper side is provided with material inlet while lower side is provided with annular conical body connected with conical bottom of gasifying furnace. The carbon outlet is arranged at bottom of annular conical body which is provided with funnel-shaped gas collection ring which is provided with gasifying furnace carbon discharging port at bottom end in middle. The outlet of conical bottom of gasifying furnace is embedded in the gas collection ring, and a fuel gas refluxing passage which stretches to carbonizing chamber is formed between outlet and the gas collection ring. The top part of carbonizing chamber is open and is connected with gas collection chamber surrounding outside carbonizing chamber to form mixing fuel gas passing passage. The lower part of one side of gas collection chamber is connected with nearby liquid catching device to form liquid filtering passage. The liquid outlet is arranged at bottom of liquid filtering passage which is provided with liquid catching region composed of deflection baffle in middle and provided with fuel gas outlet on upper side.    DESCRIPTION OF DRAWING(S) - The drawing is a cross-sectional view illustrating a generating furnace.