SU1038774A1 - Rotating furnace heat exchanger - Google Patents

Abstract

1. A HEAT EXCHANGER OF A ROTATING OVEN, containing rods fixed to the inner surface of the furnace with both ends, characterized in that, in order to increase the efficiency of heat exchange, the rods are fixed at an angle to the generator of the furnace. 2. Heat exchanger according to claim 1, in accordance with the fact that the ends of the rods are fixed in circumferences ... 3. Heat exchanger according to claim 1, which is in that the ends of the rods are fixed in screw lines . ; 4. A heat exchanger according to claims. 1 - 3, about the l and h a and y and with the fact that the rods are hollow. O) C oe 00 4

Description

This invention relates to a heat exchange technique in rotary kilns and can be used in the building materials industry.

A heat exchanger is known for a rotary oven of a furnace, comprising rods fixed on the inner surface of the furnace parallel to its axis by both ends, on which closed elements 1 are put on,

However, in such a heat exchanger when the rods are located in the upper part of the furnace, they are heated by hot gases / and in the lower position they enter the LAYER of the material and give it heat.

In addition, the heat exchanger is characterized by low heat exchange efficiency, since the rods are located along the Pelleys' Tray and are therefore poorly heated. D. The fastening elements of the rods are high below the inner surface of the furnace and therefore (Castro is destroyed by hot gases. It is impossible to change the speed of movement of the material.

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 rotary kiln containing rods fixed to the inner surface of the kiln by both ends, the latter are fixed at an angle to the generator of the kiln.

The ends of the rods are fixed around the circumference.

In addition, the ends of the rods are fastened along helical lines.

The rods can be made hollow.

In such a heat exchanger, the fastening elements of the rods can be fixed flush with the lining, and the middle part acts and participates in heat exchange, and the rods themselves, apart from being involved in heat exchange, push or brake the material, especially if they are hollow ..

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

Inside the furnace 1 with a diameter D, both ends are fixed to its inner surface by the rods 2. Fastening the rod 2 to the furnace 1 can be rigid or on chains. The length of the rods 2 is 0.1-2 D, depending on the angle of inclination of the rods 2 and the thickness of the material layer in the furnace 1 (the smaller the angle “L and the larger the material layer, the greater the length). The angle of inclination of the rods 2 lies within 75 ot / S (the more the need to protrude or retard the material, the larger of.). The rods 2 are mounted with an inclination to push the material into the area: where the material is prone (in the area of flowable sludge and wet). In the area where the material is dry and out of it when

0 decorbonations are allocated. the gases that aerate it and give it fluidity; the rods 2 are set with a slope for braking. To enhance the effect of braking or pushing the rods 2 can be poles. The distance between steps 2 is from the condition of exclusion of jamming and destruction of the granules.

The ends of the rods 2 can be placed around the circumferences (give minimal braking or pushing through the material at a given speed) or along helical lines (give a greater pushing or braking effect). On

5, the rods 2 may be loosely dressed with closed elements 3, which may be made of chains or rings and serve to clean and improve heat transfer. Number of elements 3 on each

rod 2 can be from one

up to the maximum determined by the length of the rod 2, the thickness of the elements 3 and the provision of a gap between them on the thickness of the elements 3. l The heat exchanger operates as follows

5 way.

During the rotation of the furnace 1 in the upper position, the rods 2 are well washed with hot gases, since they do not obscure each other, and in the lower position

0. go to the layer of material and give it heat. Moreover, depending on the slope of the rods 2, the material is either braked (in the hot part) or pushed (in the cold part), which is especially characteristic of hollow rods 2, since the material is braked or pushed not only by the outer, but also the inner surface. The presence of elements 3 provides

g cleaning rods 2 and increases the heat exchange surface.

.The application of the proposed heat transfer and increases the efficiency of heat exchange, which leads to fuel savings. At the same time increases

service life, as the rods 2 are fixed against the furnace body 1 and this ensures a reduction in the cost of repairs.

Claims (4)

1. A HEAT EXCHANGER OF A ROTATING FURNACE, containing rods fixed on the inner surface of the furnace by both ends, characterized in that, in order to increase the efficiency of heat exchange. barter rods are fixed at an angle to the generatrix of the furnace. 2. The heat exchanger according to claim 1, which consists in the fact that the ends of the rods are fixed in circles ... 3. The heat exchanger according to π.1, characterized in that the ends of the rods are fixed along helical lines. 4. The heat exchanger according to paragraphs. 1 - 3, distinguished by the fact that the rods are hollow. SU-. 1038774