SU792049A1 - Heat exchange apparatus for rotary furnace - Google Patents

Description

(54) HEAT EXCHANGE DEVICE FOR ROTATING FURNACE

one

The invention relates to a technique of burning materials in rotary kilns and can be used in the building materials industry.

Known rotary kiln furnaces with heat exchangers cell link and other types of l.

Their disadvantage is a large dust formation when material is poured from them. This leads to the fact that with a large dust formation their use becomes irrational. The closest in technical essence and the achieved result to the invention is a heat exchanger device of a rotary kiln containing a heat exchanger elements in the form of trays 2 fixed on its inner surface by means of brackets with hinges.

A disadvantage of the known device is the low efficiency of heat exchange, secondary wear of elements and dusting during impacts at the moment of turning over with the destruction of granules,

The purpose of the invention is to increase the efficiency of heat exchange, increase the service life of elements and reduce dust formation.

This goal is achieved by the fact that the B heat exchanging device of a rotary kiln containing fixed on its inner surface by means of brackets with hinges

heat exchange elements in the form of trays, axes aiapHHpoB trays are fixed at a distance from the inner surface of the furnace, 1.05–2 times the distance from the axis of the hinges of the tray to its farthest point. In this case, the trays are always located below the axis of rotation and their turning and strikes do not occur. On the axis

15, not one but several trays, smaller in an arc of sizes, can be suspended, which ensures the separation of the material into a larger number of prisms. The furnace at the site of installation of heat exchangers has an increased diameter, which reduces the resistance to the passage of gases.

FIG. 1 shows a furnace, a longitudinal section in FIG. 2 - section A-A. in fig. one.

Claims (2)

Inside the lined furnace 1 on the ring brackets 2 are hinged 3 heat exchange elements consisting of t 4 and trays 5. The specified size ratio is chosen from the free condition of the passage of tray 5 during rotation without touching the furnace body 1 and no jamming falling between the tray 5 and oven 1 material. In the second embodiment, instead of one tray 5, several trays b are mounted, which along a circular arc have a smaller dimension than trays 5, and are arranged in several lines. All dimensions of the heat exchange elements are determined by thermal calculation while observing the requirement -, (1.05-2) te where r is the distance from the axis of the hinge 3 of the heat exchange element to the inner surface of the furnace 1; - the distance from the axis of the hinge 3 of the heat exchange element to its most distant point, which is (o, 05 + 1) Ex, where R is the radius of the internal diameter of the furnace 1. The distance between the troughs of trays b is determined from the condition of free passage of material between them. The furnace 1 at the location of heat exchangers may have an enlarged diameter (in the drawing, sections of the furnace 1 before and after the heat exchanger are shown in dotted lines). Diameter increase: determined by thermal calculation. Works oven 1 as follows. The material enters the area of the furnace 1 with heat exchange elements. When they are in the lower position, it fills the space under and above trays 5 and 6. With further rotation, trays 5 and 6, hanging like panties, leave the slope of the material and begin to be washed with hot gases along with them. material. When the trays 5 and b are in the lower position again, the material on them is replaced by the pressure of the material poured from above, and the process is delayed. To reduce the resistance in the area of installation of the heat exchangers, the cross section of the furnace 1 can be increased. The application of the proposed device increases its efficiency due to the exclusion of dust formation, since the distance of the elements from the inner surface of the furnace ensures their smooth operation without turning and, therefore, without destroying the granules, which also increases the service life of the elements. The invention of the heat-exchanging device of the rotary kiln, which contains heat exchanging elements in the form of trays fixed on its inner surface by means of hinges and, in order to increase the efficiency of heat exchange, increase the service life of the elements and reduce dust generation, fixed at a distance from the inner surface of the oven, 1.05-2 times the distance from the axis of the hinges of the tray to its furthest point. Sources of information taken into account in the examination 1. Khodorov EI Cement industry kilns, L., Stroyizdat, 1968, p. 59-95. 2. USSR author's certificate number 647514, cl. F 28 B 7/16, 1967. V A / / -iH .i