Burner holding device comprising a cooling system for a burner arrangement in an entrained flow gasifier

Abstract

The instant invention relates to a burner holding device for burners, which is arranged on an entrained flow gasification reactor, wherein the burners ( 4, 5 ) are held in the burner holding device ( 7 ) and extend through a flange ( 11 ), which fixes the burner holding device ( 7 ) to the entrained flow gasification reactor ( 8 ) and extend through the burner holding device ( 7 ) into the entrained flow gasification reactor ( 8 ). The cooling device encompasses at least two cooling circuits ( 1, 2 ), which are independent from one another, wherein exactly one cooling circuit ( 1, 2 ) is at least partially assigned to each burner ( 4, 5 ), so that each burner ( 4, 5 ) is surrounded by a section of the cooling device on an-end facing the front surface and wherein at least one cooling circuit ( 1, 2 ) is at least partially assigned to the front surface for cooling. Below the flange ( 11 ) within the burner holding device ( 7 ) from top to bottom, a layer ( 19 ) consisting of insulating casting compound, which is fire resistant up to at least 800° C. and comprises a heat conductivity in the range of from 0.02-0.8 W/m K, a layer consisting of loose material ( 17 ), which is fire resistant up to at least 800° C., a layer ( 18 ) consisting of heat-conducting casting compound, which is fire resistant up to at least 1800° C. and comprises a heat conductivity of 3-15 W/m K furthermore surrounds the burners ( 4, 5 ).

1 . A burner holding device ( 7 ), which is arranged on an entrained flow gasification reactor ( 8 ), wherein at least two burners ( 4 ,  5 ) are held in the burner holding device ( 7 ) and extend through a flange ( 11 ), which fixes the burner holding device ( 7 ) to the entrained flow gasification reactor ( 8 ) and extend through the burner holding device ( 7 ) on a front surface of the entrained flow gasification reactor ( 8 ) into said entrained flow gasification reactor ( 8 ) and wherein a cooling device is arranged in the burner holding device ( 7 ), wherein the cooling device comprises at least two cooling circuits ( 1 ,  2 ), which are independent from one another, wherein different cooling circuits ( 1 ,  2 ) are at least partially assigned to different burners ( 4 ,  5 ), so that each burner ( 4 ,  5 ) is surrounded by a section of the cooling device on an end facing the front surface and wherein at least one cooling circuit ( 1 ,  2 ) is at least partially assigned to the front surface for cooling, and wherein below the flange ( 11 ) within the burner holding device ( 7 ) from top to bottom
 a layer ( 19 ) consisting of insulating casting compound, which is fire resistant up to at least 800° C. and comprises a heat conductivity in the range of from 0.02-0.8 W/m K,   a layer consisting of at least 800° C. fire resistant loose material ( 17 ),   a layer ( 18 ) consisting of heat-conducting casting compound, which is fire resistant up to at least 1500° C. and comprises a heat conductivity of 3-15 W/m K, surrounds the burners ( 4 ,  5 ).   
     
     
         2 . The burner holding device ( 7 ) according to  claim 1 , characterized in that the cooling circuits ( 1 ,  2 ), which are independent from one another, comprise cooling pipe coils and in that at least 20% of the overall height of a burner are surrounded by a section ( 3 ,  6 ) of the cooling coil without cooling gaps. 
     
     
         3 . The burner holding device ( 7 ) according to  claim 1  or  2 , characterized in that the independent cooling circuits ( 1 ,  2 ) can simultaneously be charged with coolant. 
     
     
         4 . The burner holding device ( 7 ) according to any one of the preceding claims, characterized in that the layer ( 19 ) of insulating casting compound, which is fire resistant up to at least 800° C., has a density in the range of 1.0 to 2.0 kg/l, preferably in the range of 1.0 to 1.5 kg/l. 
     
     
         5 . The burner holding device ( 7 ) according to any one of the preceding claims, characterized in that the layer ( 19 ) consisting of insulating casting compound, which is fire resistant up to at least 800° C., is lightweight refractory concrete. 
     
     
         6 . The burner holding device ( 7 ) according to any one of the preceding claims, characterized in that the layer consisting of loose material ( 17 ), which is fire resistant up to at least 800° C., is a fire clay brick granulate material or another lightweight refractory brick granulate material. 
     
     
         7 . The burner holding device ( 7 ) according to  claim 6 , characterized in that the fire resistant loose granulate material ( 17 ) encompasses a grain size in the range of from 8.0 to 12.0 mm diameter, preferably of 10.0 mm diameter. 
     
     
         8 . The burner holding device ( 7 ) according to any one of the preceding claims, characterized in that the heat-insulating layer ( 18 ) is a refractory concrete comprising a high heat conductivity in the range of 3 to 15 W/m K, preferably of 5 to 15 W/m K, and comprising a density in the range of 2.0 to 4.0, preferably in the range of 2.4 kg/l to 3.6 kg/l, most preferably in the range of 2.5 to 2.7 kg/l. 
     
     
         9 . The burner holding device ( 7 ) according to any one of the preceding claims, characterized in that the burner holding device ( 7 ) has a circular cross section and that a first burner is a start burner ( 4 ), which is arranged in the burner holding device ( 7 ) in a longitudinal axial manner and which is surrounded by an inner cooling circuit ( 2 ). 
     
     
         10 . The burner holding device ( 7 ) according to  claim 9 , characterized in that a plurality of further burners is arranged as main burners ( 5 ) spaced apart from the start burner ( 4 ) and are assigned to at least one outer cooling circuit ( 1 ). 
     
     
         11 . The burner holding device ( 7 ) according to any one of the preceding claims, characterized in that a casing, in particular a rolled jacket ( 12 ), which is fastened to a collar formed on the bottom side of the main flange ( 11 ), forms an inner limitation for the layers. 
     
     
         12 . The burner holding device ( 7 ) according to  claim 10 , characterized in that the outer cooling system for the main burners is fastened to the casing ( 12 ). 
     
     
         13 . The burner holding device ( 7 ) according to any one of  claims 2  to  12 , characterized in that a section of the cooling coils extends on an outer edge of the burner holding device from the front side of the entrained flow gasification reactor upwards and at least along a part of the casing ( 12 ), wherein a height of the cooling coil pipes extending upwards corresponds to a height of a collar ( 14 ) of a cooling jacket ( 14 ′) of the entrained flow gasification reactor ( 8 ), so that an annular gap ( 15 ) between the collar ( 14 ) and the cooling coil pipes extending upwards is provided, in particular an annular gap ( 15 ), which shows a gap width of 5 to 50 mm. 
     
     
         14 . The burner holding device ( 7 ) according to  claim 13 , characterized in that the annular gap ( 15 ) is filled with a fire resistant, flexible sealing cord ( 12 ) so as to form a seal. 
     
     
         15 . The burner holding device ( 7 ) according to any one of  claims 2  to  14 , characterized in that the sections of the cooling pipe coils of the at least two cooling circuits ( 1 ,  2 ), which are independent from one another, have the same length. 
     
     
         16 . The burner holding device ( 7 ) according to any one of  claims 2  to  15 , characterized in that the cooling pipe coils on the side facing the combustion chamber, are provided with a coating of fire resistant material comprising a high heat conductivity. 
     
     
         17 . The burner holding device ( 7 ) according to  claim 16 , characterized in that the coating consists of a material comprising a high silicon carbide content, which is held permanently by means of metal pins welded onto the pipe surface. 
     
     
         18 . The burner holding device ( 7 ) according to any one of  claims 1  to  17 , characterized in that the loose material ( 17 ) can be used repeatedly.