Combustor

Abstract

A combustor includes a combustion chamber including a grate and a combustion space formed above the grate; a fuel supply portion downwardly connected to a central portion of the grate to supply fuel to an upper portion of the grate; an air supply part connected to a side portion of the combustion chamber to be inclined on a horizontal plane, such that the combustion air rotates in the combustion space; a clinker collection portion downwardly communicating with a gap formed between an inner wall of the combustion chamber and the grate, to collect clinker generated by combustion of fuel in the clinker collection portion; and a reintroduction channel passing through the grate, such that the combustion air is reintroduced into the combustion space.

1 . A combustor comprising:
 a combustion chamber including a grate therein and a combustion space formed above the grate;   a fuel supply portion downwardly connected to a central portion of the grate to supply fuel to an upper portion of the grate;   an air supply part connected to a side portion of the combustion chamber to be inclined with respect to a horizontal plane, to supply combustion air such that the combustion air rotates in the combustion space;   a clinker collection portion downwardly communicating with a gap formed between an inner wall of the combustion chamber and the grate, to collect clinker generated by combustion of fuel performed in the combustion space, in the clinker collection portion through the gap; and   a reintroduction channel passing through the grate from the clinker collection portion to the combustion space, such that the combustion air, having flowed from the combustion space to the clinker collection portion through the gap, is reintroduced into the combustion space.   
     
     
         2 . The combustor of  claim 1 , wherein the reintroduction channel is provided as a plurality of reintroduction channels, and has a cross-sectional area decreasing toward a central portion of the combustion chamber in a lower portion of the combustion chamber. 
     
     
         3 . The combustor of  claim 1 , wherein the reintroduction channel is provided as a plurality of reintroduction channels, and the number of the plurality of reintroduction channels is reduced toward a central portion of the combustion chamber in a lower portion of the combustion chamber. 
     
     
         4 . The combustor of  claim 1 , further comprising a flow controlling member controlling a flow structure of the combustion air in the clinker collection portion, to restrict the clinker in the clinker collection portion from being reintroduced into the combustion space together with the combustion air. 
     
     
         5 . The combustor of  claim 4 , wherein the flow controlling member is configured to extend downwardly from a lower portion of the combustion chamber to an inside of the clinker collection portion. 
     
     
         6 . The combustor of  claim 5 , wherein the flow controlling member extends downwardly, toward a center of the combustion chamber. 
     
     
         7 . The combustor of  claim 1 , further comprising a partition wall configured to be able to separate an air supply passage and a clinker collection passage from each other in the gap, in such a manner that the clinker is collected in the clinker collection portion through the gap when the combustion air provided by the air supply part is supplied to the combustion chamber through the gap. 
     
     
         8 . The combustor of  claim 1 , further comprising a check member provided inside the clinker collection portion and configured to have a through hole having a downwardly-narrowed shape to block upwardly reverse passage of the clinker having passed downwardly. 
     
     
         9 . The combustor of  claim 1 , wherein the clinker collection portion accommodates water in a lower portion thereof, such that the clinker is deposited in the water. 
     
     
         10 . The combustor of  claim 1 , wherein the air supply part is configured to be connected to an outer wall of the combustion chamber, spaced apart from the inner wall while surrounding the inner wall, in such a manner that the combustion air rotates along an external surface of the inner wall of the combustion chamber, and then, is introduced into the combustion space through an inlet. 
     
     
         11 . The combustor of  claim 1 , wherein the air supply part comprises:
 an upper air supply portion connected to an upper side portion of the combustion chamber to supply the combustion air in such a manner that the combustion air rotates downwardly in the combustion space; and   a lower air supply portion connected to a lower side portion of the combustion chamber to supply combustion air in such a manner that the combustion air is in contact with the fuel on an upper portion of the grate to be burned and then rises along a central portion of the combustion chamber.   
     
     
         12 . The combustor of  claim 1 , further comprising a guide member having a downwardly-opening structure and disposed to protrude from an inlet, through which the combustion air is introduced into the combustion space, inwardly of the combustion space, to guide the combustion air in such a manner that the combustion air rotates downwardly in the combustion space along the inner wall of the combustion chamber. 
     
     
         13 . The combustor of  claim 1 , wherein the grate is rotationally driven, based on the fuel supply portion. 
     
     
         14 . The combustor of  claim 1 , wherein the fuel supply portion passes through the grate to protrude into the combustion space, and is configured to have a screw form to continuously supply the fuel. 
     
     
         15 . The combustor of  claim 1 , wherein the fuel supply portion passes through the grate to protrude into the combustion space, and is provided with a blocking member, having a downwardly enlarged diameter and mounted on an end portion of the fuel supply portion, adjacent to the combustion space, to distribute the fuel laterally while blocking an upward movement of the fuel. 
     
     
         16 . The combustor of  claim 1 , wherein the combustion chamber has a frustoconical shape, in which an upper portion is relatively narrow and a lower portion is relatively wide.