SU775584A1 - Rotary furnace heat exchanger - Google Patents

Description

This invention relates to a heat exchange technique in rotary kilns and can be used in production. construction materials. five

Cell, unit and other types of heat exchangers are known, which provide an increase in the efficiency of heat exchange between hot gases and material 1 .10

The closest in technical essence and the achieved result to the invention is a rotary kiln heat exchanger containing hinged along the lining-t 5 furnace axis on its inner surface pouring elements made {1e in the form of trough-shaped blades 2

When placed in the lower part of the furnace, the material gets into the trays, which 20 then rises into the upper part of the furnace into a stream of hot gases, where it is heated. At the same time, cold material protects the tray from burning. In the lower position, the material from the tray 25 is poured out, then when passing through the cut point, the hinge tray under the action of its weight turns over and collects a new batch of material. JQ

The disadvantage of this heat exchanger is the rotary dust formation and destruction of the material granules at the time of turning the trays, which reduces the efficiency of heat exchange.

The purpose of the invention is to increase the efficiency of heat transfer.

This goal is achieved by the fact that in a heat exchanger of a furnace of the furnace containing hinged along the axis of the lined furnace on its inner surface pouring elements, the latter are made in the form of hollow closed bodies. At the same time, protrusions are made on the surfaces of the hollow bodies, the hollow spruces are made elongated, and holes are made at the ends of the elongated hollow bodies. In addition / the heat exchanger is equipped with rings of wear fixed on the area around the furnace under the pouring elements. resistant materials protruding above the lining.

Claims (2)

In this design, the pouring cages after the material is released from the layer of material during the rotation of the furnace all the time smoothly rotate. After entering the layer of material, the element is turned over, dust generation and destruction of the material granules does not occur, as smoothing of the pouring element occurs along with the material. Fig. 1 shows the furnace, an extended section; Fig. 2 shows a cross section of the furnace in the installation area of the pouring elements; Fig. 3 shows a variant of the filling device with a hole and protrusions on its surface in Fig. 2; 4 shows an embodiment of a pouring element with openings at its two ends. Inside the furnace 1 with lining 2, cron mattes 3 are located equally along the circumference, on which axes 4 are located parallel to axis 1. On the axis x 4 covering them, there are placed pouring elements 5 made in the form of hollow closed bodies. The filling elements 5 can be made with protrusions 6, in which the protrusions can be in the form of corrugated ribs, etc. The filling elements 5. Can be made elongated, and at one end thereof; Or, holes 7 can be made on the wallpaper. In the area of the location of the filling elements 5, rings 8 of wear-resistant material are installed. Dimensions of element 5: a (0.05-0.3) D, b (0,, b) D, where D is the internal diameter of the furnace 1 in the light. Size C is determined by thermal calculation. The distance from the inner surface of the lining 2 to the axis 4. (0.05-0, 25) T), and choose it depending on the thickness of the layer of material. The distance between axes 4 along the arc L you. depending on the size b of element 5, they are chosen: b U 2, 5 b - from the condition of freedom of movement without strikes; cops 5 one about the other. The heat exchanger works as follows. Owing to the rotation and tilting of the furnace 1, the material moves to the hot end of the furnace 1 and enters the heat exchanger section and into each element 5 Each heat exchanger element 5, when in the upper position, takes vertical position under the weight. The hot gases heat it and the material in it. Upon further rotation, element 5 rests on the lining 2 of the furnace 1 and enters the material layer in such a position then begins to rise along with it. Upon further elevation, element 5 slips along the lining 2 until it reaches the technical thrust until it rests its second end on axis 4. After that, it begins to rise, the material that was in it is poured down and partially poured out from the side of the hot end, and from the cold end. a new one is poured into it. The process then repeats. With each turn of the furnace, the hanging down end of element 5 changes, which contributes to its longer operation. The protrusions 6 present on the elements 5 increase the surface and, consequently, the heat exchange efficiency. When the elements 5 are made with the product, in the upper position, a greater overlap of the cross section of the furnace 1 is provided, and, consequently, the efficiency of heat exchange increases. Making a hole in the elongated element 5 contributes to the fact that with each revolution all the material is poured out of it, which increases the uniformity of heating of the material due to its more intensive circulation. The presence of rings 8 of wear-resistant material ensures the safety of the lining 2 when slipping elements 5 and eliminates the destruction of the granules. The application of the proposed heat sink increases the efficiency of heat exchange, since increased dust formation is eliminated at the moment of turning over the elements 5, as well as the destruction of the material granules. Invention Formula. 1. A rotary kiln heat exchanger containing pouring elements along the axis of the lined furnace on its inner surface, characterized in that, in order to increase the efficiency of heat exchange, the pouring elements are made in the form of hollow closed bodies. 2. A heat exchanger according to claim 1, wherein the projections are made on the surfaces of the hollow bodies. 3. Heat exchanger on PP. 1, 2, which is characterized by the fact that hollow bodies are made oblong. 4. Heat exchanger on PP. 1-3, characterized in that holes are made at the ends of the elongated hollow bodies. 5. Heat exchanger on PP. 1-4, characterized in that. it is equipped with rings of izyosostoykbb material protruding above the lining fixed around the furnace circumference under the pouring elements. Sources of information taken into account in the examination 1. E. Khodorov. Cement cement kilns L., Stroyizdat, 1968, p. 59 - 95. 2. Authors certificate of the USSR 647514, cl. F 27 B 7/16, 1976. a - X iJii