The present disclosure provides a system and a method for calcining coal gangue, which belongs to the technical field of coal gangue treatment and resource utilization. The system for calcining coal gangue provided by the present disclosure includes a pretreatment system (1), a crusher (4), a screening system (5), an elevator (6-1), a screw feeder (6-2 ), a rotary kiln (7), and an exhaust gas treatment system (8). The crusher 4 includes a hammer crusher or an impact crusher. The screening system 5 includes a flip-flow screen or a vibrating screen. Both the flip-flow screen and the vibrating screen are of double-layer screen mesh structures. The mesh size of an upper-layer screen f a double-layer screen mesh structure is 25 mm, and the mesh size of a lower-layer screen of the double-layer screen mesh structure is 0.5 mm.

A system for combusting fuel comprising an apparatus that receives fuel that is characterized as comprising interstitial spacing and wherein oxidants pass through the interstitial spacing of the fuel to sustain a combustion reaction at the interface of a reaction chamber while the byproducts of combustion pass into the reaction chamber.

A stove using biomass pellets as fuels includes a stove body, wherein the stove body comprises a firebox; hopper, wherein the hopper is fixed above the stove body; and feed tube, wherein the top end of the feed tube which is connected to the hopper is fixed outside the stove body, the bottom end of the feed tube which is connected to the firebox crosses the stove body. The stove using biomass pellets as fuels solves the problem that common pellet stoves usually transfer the fuels to the hearth using a screw feeder or other feeding equipment, which expend too much cost.

A stove using biomass pellets as fuels includes a stove body, wherein the stove body comprises a firebox; hopper, wherein the hopper is fixed above the stove body; and feed tube, wherein the top end of the feed tube which is connected to the hopper is fixed outside the stove body, the bottom end of the feed tube which is connected to the firebox crosses the stove body. The stove using biomass pellets as fuels solves the problem that common pellet stoves usually transfer the fuels to the hearth using a screw feeder or other feeding equipment, which expend too much cost.

A system for combusting fuel comprising an apparatus that receives fuel that is characterized as comprising interstitial spacing and wherein oxidants pass through the interstitial spacing of the fuel to sustain a combustion reaction at the interface of a reaction chamber while the byproducts of combustion pass into the reaction chamber.