A melting equipment comprising: a melting furnace that combusts and melts an ash; a secondary combustion chamber disposed above the melting furnace; a slag extraction chute that guides a slag generated in the melting furnace downward; a bypass channel that connects the slag extraction chute and the secondary combustion chamber; an ejector (21; 21A; 21B; 26; 27; 28) that is provided on the bypass channel, has a front end opening portion surrounded by a contraction portion at which a channel cross section thereof is narrowed, and suctions a combustion exhaust gas into the bypass channel; a driving air supply pipe that ejects high-pressure air toward the downstream side from the front end opening portion surrounded by the contraction portion, the ejector being characterized in that it comprises an adhesion-prevention unit (31; 32; 33; 34; 35; 36; 36A; 37; 38) configured to prevent an incorporated substance that is incorporated in the combustion exhaust gas from attaching to an inner wall surface of the ejector, wherein the adhesion-prevention unit (31; 32; 33; 34; 35; 36; 36A; 37; 38) comprises: an air knocker which is provided on an outer wall of the ejector and supplies vibration to the inner wall surface of the ejector by striking the outer wall surface of the ejector so that the incorporated substance attached to the inner wall surface of the ejector is capable of being removed; and an air blaster which injects air to the inner wall surface of the ejector, and wherein the air blaster is provided with a front end portion configured to inject a compressed air from a lower side than a front end opening portion provided in the driving air supply pipe. a melting furnace that combusts and melts an ash; a secondary combustion chamber disposed above the melting furnace; a slag extraction chute that guides a slag generated in the melting furnace downward; a bypass channel that connects the slag extraction chute and the secondary combustion chamber; an ejector (21; 21A; 21B; 26; 27; 28) that is provided on the bypass channel, has a front end opening portion surrounded by a contraction portion at which a channel cross section thereof is narrowed, and suctions a combustion exhaust gas into the bypass channel; a driving air supply pipe that ejects high-pressure air toward the downstream side from the front end opening portion surrounded by the contraction portion, the ejector being characterized in that it comprises an adhesion-prevention unit (31; 32; 33; 34; 35; 36; 36A; 37; 38) configured to prevent an incorporated substance that is incorporated in the combustion exhaust gas from attaching to an inner wall surface of the ejector, wherein the adhesion-prevention unit (31; 32; 33; 34; 35; 36; 36A; 37; 38) comprises: an air knocker which is provided on an outer wall of the ejector and supplies vibration to the inner wall surface of the ejector by striking the outer wall surface of the ejector so that the incorporated substance attached to the inner wall surface of the ejector is capable of being removed; and an air blaster which injects air to the inner wall surface of the ejector, and wherein the air blaster is provided with a front end portion configured to inject a compressed air from a lower side than a front end opening portion provided in the driving air supply pipe. an air knocker which is provided on an outer wall of the ejector and supplies vibration to the inner wall surface of the ejector by striking the outer wall surface of the ejector so that the incorporated substance attached to the inner wall surface of the ejector is capable of being removed; and an air blaster which injects air to the inner wall surface of the ejector, and wherein the air blaster is provided with a front end portion configured to inject a compressed air from a lower side than a front end opening portion provided in the driving air supply pipe.