SU1495569A1 - Distributing grid for fluidized bed furnace - Google Patents

Abstract

The invention can be used in the combustion of solid fuels. The purpose of the invention is to increase the sustainability of the operation of the furnace. The hearth is made of individual sheets 3 with the edges 4 bent upwards and located between the fuel supply and ash discharge nozzles under the cooled angular section 7 slats with displacement relative to the latter and with the formation of gaps 8 between adjacent sheets 3. Air distributing are made in the bent edges 4 of the sheets 3 the holes 2 and the bars 7 have horizontal bars 9 connecting the edges of the bars 7 and adjacent to the ends of the bent edges 4 of the adjacent sheets at a predetermined distance from the edges of the bars 7. This distance is not less than the introduction of the cotangent of the angle of repose of the fuel and the distance from the end of the sheet 3 to the lower generatrix of hole 2. Between each two adjacent planks 7 below their level are installed with the possibility of reciprocating movement of the string 10 with sawtooth protrusions 11, the pushing edges of which are perpendicular to t and are located on the side of the ash outlet. Pulls ensure agitating of particles prone to bedding and simultaneous removal of the largest particles formed in the agglomerates. 1 hp ff, 2 ill.

Description

31A

The invention relates to energy and can be used in the combustion of solid fuels.

The purpose of the invention is to increase the sustainability of the work.

Fig. 1 shows a gas distribution grid of a fluidized bed furnace; figure 2 is the same, side view.

The gas distribution grid of the furnace 1 with a fluidized bed of inert material contains a bottom with air-blowing holes 2 made of separate sheets 3 with edges 4 bent upwards located between the fuel supply nozzles 5 and ash 6 under the cooled angled section 7 with offset : the latter and with the formation of gaps 8 between adjacent sheets 3. The openings 2 are made in the flanges A of the sheets 3, the strips 7 are provided with horizontal bridges 9 connecting the edges of the strips 7 and adjacent to the ends of A ognutr edges of adjacent sheets 3 at a predetermined distance from the edges of the strips 7 constituting yuschem least a value equal to the product of the cotangent of the angle of repose of the fuel and the distance from the end of the lower sheet 3 to form an opening 2.

Between each dvzgm neighboring plugs 7 below the level of the latter are installed with the possibility of reciprocating movement of the propeller 10 with the protrusions 11, the pushing edges of which are perpendicular to t and located on the side of the pipe 6 of the ash. Ti gi 10 can be equipped with manual or mechanical: drives (not shown). The ratio of the flow area at jumper level 9 to the lattice area was

0

0

five

0

five

0

Kie - at the top. The plugs 10 with sawtooth protrusions I1 ensure the turning of particles prone to bedding and simultaneous removal of the most large particles formed by the agglomerates, moving them along the grid towards the nozzle 6 of the sanding platform.

The use of water-cooled slats 7 of angular section with jumpers 9 will allow maintaining the temperature of the layer within 800-950 C. Changing the cross-sectional area and opening angle between adjacent slats within 0.05-0.5 t and 28 - 60 °, you can reconcile the thermal balance in the layer.

Claims (2)

1. Gas distribution grid of a fluidized bed of inert material, containing a bottom with air diffusing holes, made of individual sheets with upwardly bent edges located between the pipes for fuel supply and ash discharge under cooled slats of the angular section and offset from the latter and with the formation of gaps between adjacent sheets, characterized in that, in order to increase the stability of the work, the holes are made in bending the edges of the sheets, the planks are provided with horizontal jumpers connecting the edges of the slats and adjacent to the ends of the folded edges of the adjacent sheets at a given distance from the edges of the slats, which is not less than the product of the cotangent of the angle of natural otkos top em 0.05-0.5. Sheets 3 can be cut off, from the center and from the end of the sheet to the bottom of the U-shaped cross section of the lower forming hole. Gas distribution grid2. The slouch according to claim 1, about t and u works as follows. The fuel (coal) with a fractional composition of 0.25 mm is entangled on the surface of the grate in a mixture with inert material through the fuel supply pipe 5. Air is supplied through openings 2, with large particles liquefying in the lower part of slats 7, small 50 55 This means that between every two adjacent planks below the level of the latter, there are installed with the possibility of reciprocating two rods with saw-tooth protrusions whose pusable edges are perpendicular to them and located on the side of the ash discharge pipe. 2. Bashka according to claim 1, about t l and that between each two adjacent planks below the level of the latter are installed with the possibility of reciprocating motion with sawtooth protrusions, the pushing edges of which are perpendicular to t and located on the side of the ash discharge pipe. Fuel VggyU rTbrtury rt vfvt angle h J d t. / /.h/ Jftlfl / / / Jftlfl v & g / 2