Secondary combustion furnace with combustion speed adjustment function

Abstract

The present disclosure discloses a secondary combustion with a combustion speed adjustment function, including an outer barrel and an inner barrel; the inner barrel is provided with a combustion cavity; the outer barrel is provided with a first air inlet hole; the inner barrel is provided with a second air inlet hole; a ventilation clearance is reserved between the inner barrel and the outer barrel; a waste tray is arranged in the ventilation clearance; a plurality of third air inlet holes are arranged above the combustion cavity; an adjustment valve is arranged at a lower end of the outer barrel; and supporting legs are arranged on a lower end surface of the outer barrel.

What is claimed is: 
     
         1 . A secondary combustion furnace with a combustion speed adjustment function, comprising an outer barrel and an inner barrel arranged in the outer barrel; the inner barrel is provided with a combustion cavity; the outer barrel is provided with a first air inlet hole in a lower end surface; a second air inlet hole corresponding to the first air inlet hole is formed in a lower end surface of the inner barrel; a ventilation clearance is reserved between the inner barrel and the outer barrel; a waste tray is arranged on a lower side of the ventilation clearance corresponding to the inner barrel; a plurality of third air inlet holes communicated with the ventilation clearance are arranged above the combustion cavity; an adjustment valve corresponding to the first air inlet hole and used for adjusting a size of the first air inlet hole is arranged at a lower end of the outer barrel; and supporting legs are arranged on a lower end surface of the outer barrel. 
     
     
         2 . The secondary combustion furnace with the combustion speed adjustment function according to  claim 1 , wherein the outer barrel is provided with an inner cavity; the inner barrel is placed in the outer barrel; a first stop ring is arranged above the inner cavity; an upper end of the inner barrel extends to an outer side to form a second stop ring matched with the first stop ring; the secondary combustion furnace further comprises a furnace cover; and the furnace cover is covered at an upper side of the second stop ring. 
     
     
         3 . The secondary combustion furnace with the combustion speed adjustment function according to  claim 2 , wherein the first stop ring is lower than an upper end surface of the outer barrel, and forms an outer stop ring; and the furnace cover is covered in a region encircled by the outer stop ring. 
     
     
         4 . The secondary combustion furnace with the combustion speed adjustment function according to  claim 3 , wherein the furnace cover is provided with an upper-end smoke outlet; the furnace cover is further provided with a smoke guide portion corresponding to the smoke outlet; and the smoke guide portion is an upwards retracted guide slope. 
     
     
         5 . The secondary combustion furnace with the combustion speed adjustment function according to  claim 4 , wherein the outer barrel and the inner barrel are both cylindrical; and the plurality of third air inlet holes are circumferentially arranged along a circle center of the inner barrel. 
     
     
         6 . The secondary combustion furnace with the combustion speed adjustment function according to  claim 3 , wherein the supporting legs are arranged on a front end surface of the outer barrel in a retractable manner, and there are three or more supporting legs. 
     
     
         7 . The secondary combustion furnace with the combustion speed adjustment function according to  claim 3 , wherein the adjustment valve is a rotating piece rotatably connected to the lower end surface of the outer barrel; the rotating piece is provided with a fourth air inlet hole corresponding to the first air inlet hole; and the rotating piece integrally extends to form a rotating portion. 
     
     
         8 . The secondary combustion furnace with the combustion speed adjustment function according to  claim 3 , wherein an outer side wall of the outer barrel is connected with a lifting handle.