Apparatus for the conveyance and/or treatment of hot gases

#The invention relates to an apparatus such as a blower for the conveyance and/or treatment of hot gases, particularly of dust or material laden hot gases, in a ventilator or ventilator mill portion of furnaces or other devices for the calcination and sintering of lime, magnesite, dolomite or the like.

#In the case of thermal processes, particularly upon the calcination of sintering of lime, dolomite, or magnesite, it is frequently necessary for the attainment of high efficiency to draw off the hot gases at determined points of the furnace or other devices for the thermal treatment, and to convey it back again at other points. For this efficiency, thermally high loadable or chargeable conveyor apparatus are necessary, which may also overcome the flow resistance of the hot gases through the materials to be treated.

#It is known for the conveyance of hot gases laden with materials inclined to caking to utilize injectors. The injectors have the disadvantage that their degree of efficiency is poor, that is, below 50% and that the pressure increase attainable with them is relatively low.

#FIG. 1 illustrates a section through a gas conveying apparatus constructed as a radial compressor;

#FIG. 2 illustrates a section through the hub of the radial compressor according to FIG. 1, as well as; and

#FIG. 3 illustrates an embodiment with a hot gas channel constructed as a gas conducting part.

#In FIG. 1, the reference character 1 indicates the shaft of the gas conveying apparatus with the drive and cooling liquid introduction flanges 2. The shaft 1 runs in the bearings 3, which are arranged in the wall 4 of the hot air channel. The hot air channel consists advantageously as shown of stone material, but may, however, also consist of steel resistant to high heat. The arrows 5 indicate the path of the hot gases.

#In the interior of the conveyor apparatus are located the blades 7 which are held and guided by the middle disc 8, which carries in its interior a cooling liquid conducting wall 9. The blades 7 are advantageously constructed so that they may be flowed through lengthwise by the cooling liquid. For this purpose the blades lying in each case adjacent one another are connected on their outer side by a transverse channel 14 through which the cooling liquid in the blade may flow over on the other side of the central disc 8. The blades 7 have in their interior flow distribution members 15, which insure that the cooling liquid is actually distributed over the entire cross-sectional surface of the blades 7. Therefore it is advantageously attained that there is a flow-through of the otherwise stream-free corners. The blades 7 may be constructed both straight as well as also curved forwards or backwards. The blades 7 are guided and held by means of grooves or the like on the hub 6 and the middle disc 8, so that they may freely expand from their fastening point inwardly on the blade foot with respect to the hub 6 and the middle disc 8.

#The delivery and takeoff conduit of the cooling liquid to the conveying apparatus is indicated by the arrows 16 and 17 where the index a indicates the inlet and the index b the outlet of the cooling liquid. The cooling liquid 16 serves especially for the cooling of the blades 7, while the cooling liquid 17 advantageously cools the shaft 1, the hub 6 and the middle disc 8. The delivery of the cooling liquid to the stationary spiral housing parts 10 and 12 takes place advantageously on the tongue lying to the rear of the plane of the drawing, at the beginning of the spiral housing, while the outlet of the cooling liquid takes place in the area of the flange 11. The spiral housing 10 consists advantageously of three main parts, namely, the outer sleeve 10 and the side parts 12, which in each case are flowed through separately by the cooling liquid. The parts of the spiral housing are arranged so that the side parts 12 and the sleeve 10 may expand individually in an unhindered manner.