Apparatus and method for the post combustion of hot material on a conveyor

Abstract

Apparatus ( 1 ) for the conveyance of hot material ( 2 ) out of at least one combustion boiler ( 3 ), having at least one conveyor ( 4 ) for conveying the hot material ( 2 ) from a material reception region ( 5 ) of the at least one conveyor ( 4 ) from a material delivery space ( 6 ) of the at least one conveyor ( 4 ) along a conveying section ( 7 ) and at least one housing ( 13 ) surrounding the at least one conveyor ( 4 ), at least one oxidant feed ( 23 ) being arranged in or on the at least one housing ( 13 ) along the conveying section ( 7 ) at a distance from the material delivery space ( 6 ).

1 . Apparatus for the conveyance of hot material out of at least one combustion boiler, comprising:
 at least one conveyor for conveying the hot material from a material reception region of the at least one conveyor to a material delivery space of the at least one conveyor along a conveying road,   at least one housing surrounding the at least one conveyor, and   at least one oxidant feed which is arranged in or on the at least one housing along the conveying road at a distance from the material delivery space.   
     
     
         2 . Apparatus according to  claim 1 , wherein the at least one oxidant feed is connected to at least one hot-air generator. 
     
     
         3 . Apparatus according to  claim 1 , further comprising:
 at least one sensor for determining a characteristic value for a degree of combustion of the hot material.   
     
     
         4 . Apparatus according to  claim 3 , further comprising:
 a control which is connected in a data-conducting manner to the at least one sensor and the at least one oxidant feed and which is configured to control the at least one oxidant feed, on demand, as a function of the characteristic value, determined by the at least one sensor, for the degree of combustion of the hot material.   
     
     
         5 . Apparatus according to  claim 1 , further comprising:
 a hot-air generator, coupled to the at least one oxidant feed, to control temperature of the oxidant,   a cooling air-stream feed, coupled to the at least one conveyor, to control mass flow of the oxidant, and   a set of valves including (i) a combustion space valve coupled to a combustion space of the at least one combustion boiler, (ii) exhaust valves coupled to locations extending along an exhaust path of the at least one combustion boiler, and (iii) an ambient surroundings valve to intake gas from ambient surroundings adjacent the at least one combustion boiler, the set of valves being constructed and arranged to control flow velocity, volume flow and oxygen concentration of the oxidant, and   wherein the oxidant feed is constructed and arranged to (i) pivot to control flow direction of the oxidant, and (ii) move to different locations within the housing to control where the oxidant is fed within the housing.   
     
     
         6 . Method for conveying hot material out of at least one combustion boiler, the method comprising the steps of:
 a) providing hot material from the at least one combustion boiler in a material reception region of at least one conveyor,   b) conveying the hot material from the material reception region of the at least one conveyor to a material delivery space of the at least one conveyor along a conveying road,   c) post combusting the hot material on the at least one conveyor by the on demand feed of oxidant into at least one housing of the at least one conveyor, wherein the feed of oxidant takes place at a region of the at least one housing which is located at a distance from the material delivery space of the at least one conveyor, and   d) cooling the hot material by an additional cooling-air stream at least in the material delivery space of the at least one conveyor.   
     
     
         7 . Method according to  claim 6 , wherein in step c) the feed of the oxidant is controlled, on demand, as a function of a characteristic value for a degree of combustion of the hot material. 
     
     
         8 . Method according to  claim 7 , wherein the characteristic value for the degree of combustion of the hot material is determined by means of at least one sensor. 
     
     
         9 . Method according to  claim 7 , wherein the control of the feed of oxidant comprises at least the influencing of one of the following properties of the oxidant:
 temperature of the oxidant,   flow velocity of the oxidant,   flow direction of the oxidant,   volume flow of the oxidant,   mass flow of the oxidant,   oxygen concentration of the oxidant,   location of the feed of oxidant into the housing.   
     
     
         10 . Method according to  claim 6 , wherein the addition of the oxidant and cooling by the cooling-air stream are coordinated with one another. 
     
     
         11 . Method according to  claim 6 , wherein the feed of oxidant is provided by an oxidant feed, and wherein steps c) and d) involve adjusting and setting each of the following:
 a hot-air generator, coupled to the oxidant feed, to control temperature of the oxidant,   a cooling air-stream feed, coupled to the at least one conveyor, to control mass flow of the oxidant, and   a set of valves including (i) a combustion space valve coupled to a combustion space of the at least one combustion boiler, (ii) exhaust valves coupled to locations extending along an exhaust path of the at least one combustion boiler, and (iii) an ambient surroundings valve to intake gas from ambient surroundings adjacent the at least one combustion boiler, the set of valves being constructed and arranged to control flow velocity, volume flow and oxygen concentration of the oxidant, and   wherein the oxidant feed is constructed and arranged to (i) pivot to control flow direction of the oxidant, and (ii) move to different locations within the housing to control where the oxidant is fed within the housing.