SU1522010A1 - Heat exchanger for rotating furnace - Google Patents

Abstract

This invention relates to a heat exchange technique in rotary kilns and can be used in the building materials industry. The purpose of the invention is to increase the heat exchange efficiency. The heat exchanger contains movably mounted inside the furnace on brackets 2 with axes 3 and cleaning plates 4 oblong hollow closed heat exchange elements 5 formed by hollow semi-bodies of rotation 6 arranged at their tops, connected remotely by rods or plates 7, and in semi-rotation 6 can the holes 11 are made, and the heat exchange elements 5 can be freely covered by hollow closed flexible elements 9, for example, chains interconnected by rods 10. 2 Cp. f-ly, 2 ill.

Description

A a

W

CZ

fO

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FIG. 2

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

The aim of the invention is to increase the heat exchange efficiency.

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

Inside the rotary kiln 1, the brackets 2 with the axles 3 and the plates k attached to them radially towards the furnace body 1 are freely suspended by heat-exchange elements 5 consisting of two hollow halves of the rotation bodies 6, remotely connected by plates 7 or rods 8 The heat exchanging elements 5 can be freely covered by two or more closed flexible elements 9 interconnected by rods 10. In the semi-shells of rotation 6, holes 11 can be made.

The dimensions, the configuration, the number of all heat exchanging elements 5 are determined by thermal calculation taking into account the performance, depending on the heat resistance of their materials and the temperature of the hot gases. The number of heat exchange elements 5 around the circumference is determined constructively from the conditions for excluding their contact with each other in the lower position.

The radius of the semi-shell 6 of rotation and their length along the axis of the furnace 1 is determined by the specified amount of material being lifted. Moreover, the half-heel of rotation 6 can be not only with a cylindrical outer surface, bounded on both sides by half-babies, as shown in FIG. 1 and 2, but there may be other forms that are more difficult to manufacture. In order to improve the centering on the axis x 3, the elements 5 in said half-babies may have recesses (not shown).

Dimensions of distance plates 7. or rods 8 are determined, depending on the larger size of the element 5, in a plane perpendicular to the axis of the furnace 1, taking into account the dimensions of the rotation semi-shells 6. The rods 8 are used for more sticky material to avoid sticking. The length of the closed flexible elements 9 (chains) is taken from the condition of free spanning of elements 5,

in which they are slid down in a position along chains 9, as in caterpillars. The number of chains 9 takes at least two, and the maximum number is determined by the length of the elements 5 along the axis of the furnace 1 from the condition that they are located close to each other.

The length of the rods 10 is taken approximately equal to the length of the elements 5 along the axis of the furnace 1, and their number is taken at least two for each element 5. The dimensions and number of holes 11 are made based on the condition of pouring out the entire sludge in the upper position. The dimensions of the cleaning plates C are determined by the configuration of the axial section of the internal cavity of the semi-shells 6 of rotation according to the conditions of the free passage of the plates through them. In the plates, a hole (not shown) can be made in the middle in order to reduce their smearing, the shape of which is similar to the configuration of the plate k itself, ensuring the necessary strength of the remaining part.

The height of the brackets 2 is determined depending on the dimensions along the major axis of the elements 5, based on the conditions of the passage of the latter under the plate in the lower position. The distance between the brackets 2 is taken approximately equal to the size of the elements 5 along the axis of the furnace 1 with the free passage of the latter. The remaining dimensions are determined constructively and tested for strength and operability.

The heat exchanger operates as follows.

The material rises up the elements 5 into the stream of hot gases and warms up well. If the elements 5 are installed in the zone of flowable sludge, then in order to improve the heat exchange in the elements 5, holes 11 are made through which sludge rain is formed. Then, the 5/1 elements on the furnace body t enter the material layer, then slide along the furnace body 1 or. chain 9 until the other end abuts against axis 3 or plate C, the material in element 5 is replaced and the process is repeated. We take all this time the plate k cleans the internal cavity of the element 5. Chain 9 also participates in heat exchange.

The use of the proposed heat exchanger will increase the efficiency of tep515220

Loss of exchange due to an increase in the amount of material lifted into the stream of hot gases, which will lead to fuel savings. At the same time, a large mass of material protects element 5 from combustion, which increases the reliability of elements 5 and reduces the cost of repairs.

Claims (3)

Claims 1. A rotary kiln heat exchanger comprising movably fixed oblong closed heat exchangers mounted inside the kiln on brackets with axes. elements, characterized in that, in order to increase the efficiency of heat exchange, heat exchange elements 106 The copes are formed by hollow semi-bodies of rotation located at their tops, remotely interconnected by rods or plates, and provided with cleaning plates attached to the axis radially in the direction of the furnace body, corresponding in configuration to the axial section of the internal cavity of the semi-rotating parts. 2. The heat exchanger according to p. T, which is due to the fact that the rotation semi-bodies are made with openings. 3. Heat exchanger according to claims 1 and 2, characterized in that the heat exchanger elements are freely covered by closed flexible elements interconnected by rods. .. Phie. one