SU1204905A1 - Heat exchanging arrangement of rotating furnace - Google Patents

Description

The invention relates to a technique of intra kiln heat-exchanging devices of a rotary kiln, for example, for firing cement clinker.

The purpose of the invention is to intensify the heat exchanger and increase the degree of dust collection.

FIG. 1 shows a heat exchange device, a longitudinal section; in fig. 2 shows section A-A in FIG. one.

The heat exchange device is installed in the rotary kiln 1, which is inside covered with lining 2. Between the rows of the chain curtain 3 in the working space 4, free from the chain, a group of conical elements 6 and 7 of at least two conical elements is freely highlighted. When each element is connected to the body of the furnace 1 by means of chains 5. A group of conical elements consists of a cone 6 and rings 7 attached below it. Along the length of the furnace 1, the conical elements are installed with an increase in their diameter.

The distance {(in meters) between the conical elements 6 and 7, as indicated on the chains, is determined from the relation:

I K-L, F,

) de F is the density of the chain curtain, (in the known chain curtains F 2 10-m2 / m2);

L-distance of the passage of gases along the axis

furnaces tilted by conical elements from a chainless corridor and passing along a chain curtain, m (L 1-b are furnace diameters, the maximum value corresponds to the minimum value F and, accordingly, the minimum value L corresponds to the maximum density of the curtain F;

K-coefficient, taking into account the design of the chain curtain, is equal to 0.002-0.03.

Thus, the distance provides the same resistance to the passage of gases through the conical elements mounted on the closed section of the furnace. The largest diameter of the conical elements on the chainless corridor is 0.25-0.6 times the gas passage diameter of the furnace.

The device works as follows.

During the rotation of the furnace 1, the circuit 5 supports the elements 6 and 7 in the working space 4, free from the chains, and this closes the unhindered passage of gases through the chainless corridor. By conical elements, a part of the gases is thrown in the direction of the chain curtain 3. The passage between the conical elements, the gases increase the speed, while the vacuum increases at the site of the increase in speed and the information on prices x 5 elements 6 and 7 approach each other. With

When approaching the resistance to the passage of gases increases, the passage of gases decreases, the rarefaction in the space between the elements increases and they move apart. Thus, thanks to the autonomous suspension of conic elements, at a given distance, automatic regulation of the resistance to the passage of gases through a group of elements and along a chainless corridor is achieved in accordance with the resistance in the chain curtain. This greatly improves the operation of the heat exchanger, since the resistance in the chain curtain varies with the presence of material on the chains.

The separation of the gas flow into two parts and the uniform passage of gases through the visited 5 chains and the chainless corridor provide for an intensive heating of the chain curtain and the surface of the lining, as a result of which the heat exchange is intensified and the degree of dust removal is increased.

Sls avitel T. Gubarev

Editor K. VoloschukTehred I. Be | iee Corrector A. Zimokosov

Order 8514/39 Circulation 561 Subscription

VNIIPI USSR State Committee

for inventions and discoveries

113035, Moscow, 4/5, Raushsk nab.

Branch PPP "Patent, Uzhgorod, st. Project, 4

Claims (1)

HEAT EXCHANGER OF A ROTARY FURNACE, containing conical elements installed along the axis of the furnace between the chains of the chain curtain with increasing diameter along the length of the furnace, characterized in that, in order to intensify heat transfer and increase the degree of dust collection, each conical element is connected to the housing by means of chains and placed in the working space free from chains. Figure 1 SU ... "204905