SU50076A1 - Kiln for burning or drying materials or products with moderate heat - Google Patents

Description

In MANY productions, it is required to heat the treated objects to TenftiepaTypH, which is significantly lower than the burning temperature, and the property of the objects is such that it does not allow even partial and temporary overheating. In existing fiery furnaces, this goal is achieved by diluting the combustion products with such amount of cold air so that the mixture will receive the temperature allowed by the objects being processed.

The use of fuel heat in such furnaces is imperfect and, moreover, the atmosphere in the furnace contains a lot of free oxygen, which is sometimes unacceptable.

In the proposed furnace, in order to properly lower the temperature of superheated gases (for example, flue gases), the latter are diluted with gases that have been spent in the working chamber.

In the schematic drawing of FIG. 1 shows a horizontal section through a furnace along the line LMNOPQ in FIG. 2; FIG. 2 shows a cross section of the furnace along the line AB and PA of FIG. one; FIG. 3 is a cross-section along the line CD in FIG. one; FIG. 4 is a longitudinal section through the EFQHIK line in FIG. one; FIG. 5 is a cross section and FIG. b-longitudinal section of a modified double-furnace.

The firebox 7 communicates with the distribution chamber 3 located under the shaft 4 through the vertical channel 2 (figs. 1, 2, 4) and is fitted with slots 5 (figs 2, 3, 4) and is located below the floor level of the working space. 6

Between this space and the shaft 4 there is a wall 7, in the lower part of which there is an opening 8, which communicates the working space with the shaft. In the overlap of the working space b, there is a hole I indicating a working space with a cavity 10 above it.

Hot gases, which are too high for this process, flow from the firebox 7 or heater along channel 2 to the distribution chamber 3, from where they slit through the slot 5 into the shaft 4, where they mix and heat the gases that are there. , through the cavity 10 and the hole 9 rush

to the working space b, replacing part of the exhaust gases that are sucked through the hole 8 into the shaft 4. Thus, internal ring circulation will occur, as in the mine 4, due to the constant influx of superheated gases, the temperature will always be higher than in the working space 6 which is filled with cold heated material.

The influx of superheated gases is regulated either by decreasing the slots 5 or decreasing the supply of superheated gas to chamber 3,

In the modified furnace (Fig. 5 and 6), two working spaces 6,6 are arranged, located on both sides of the shaft 4.

To release an excess of gases in the furnace, a pipe / 5 is arranged, and for exhausting smoke during the furnace furnace – MKak pipe and in the furnace described above, hot gases from the firebox / go through channel 2 to distribution chamber 3, from which, passing through slots 5 in the roof, enter the shaft 4, formed, in order to achieve internal circulation, by walls 7, mounted on posts //. In mine 4, the hot gases are mixed with the exhaust gases flowing through the openings 8.8, located at the bottom of the working spaces 6.6, in which the articles being baked move on the conveyor with the forms. The gas mixture obtained in mine 4 then passes through apertures 9.9 to the upper parts of spaces 6.6; after heating the molds, a part of the circulating gases rushes down through the openings 9.9 into the shaft 4, while the excess of the circulating gases is discharged through the boronov / 2 into the pipe / 5. The smoke generated during the furnace firing is discharged through the M pipe. The products are processed through moderate heat. The furnace moves through the drums 5, J6, 17, 18, 19, 20, 21. The residence time of the material in the furnace is controlled by the speed of rotation of the drums and changing the length of the conveyor chain, for which the drum 18 is designed so that it can be moved in the vertical direction.

The subject matter of the invention.

Claims (3)

1. A furnace for firing or drying materials or products with moderate heat, provided for mixing the hot gases with the exhaust shaft, communicating with the working space by the openings both at the top and at the bottom, characterized in that for carrying out the hot gases from the firebox / in The shaft 4 is served by a vertical channel 2 opening into the distribution chamber 5 located above it, the roof of which is provided with slots 5 and is located below the floor level of the working space 6 (Fig. 1, 2, 3, 4). 2. A furnace change according to claim 1, characterized in that the furnace is made dual and is provided with a pipe 13 intended to release excess gases (firm 5 and 6). 3. Application in the furnace according to claim 2 of the pipe 14 for the removal of smoke when the furnace is kindled (Fig. 6). to the author's certificate of G. I. No. 50076 Lappa-Starshenetskos Fig2 i BTOpcKOMy certificate G. I. Fig 5. No. 50076 Lapp-Starzhenedky