SU1249284A1 - Rotary furnace heat-exchanging arrangement - Google Patents

Description

I

The invention relates to oven furnace heat exchangers, for example, for burning cement clinker.

The purpose of the invention is the intensification of heat exchange and pseudo-capturing.

Fig el shows the proposed device, a longitudinal section; figure 2 - section aa in figure 1.

The device comprises a chain curtain 2 placed inside the rotary kiln 1 and a cone-shaped element 3, freely suspended on chains 4, which at one end are attached to the body of the furnace 1 and the other end to the surface of the element 3.

The V-shaped grooves 5 are made along the generatrix of the cone-shaped element 3, and the element 3 itself is directed towards the gas movement, sections B with the heat exchanger alternate with the chain curtain 2 and the cone-shaped element 3, which is eccentrically suspended and is located in the chainless corridor 6. the chain the curtain 2. The diameter of the cone-shaped element 3 is -0.1-0.6 gas passage diameter of the furnace. The diameter of the cone-shaped element is 0.7-2.1 times the diameter of the chainless corridor 6 ,.

The distance between the cone-shaped elements 3 installed along the length of the furnace 1, equal to 1–5 diameters of the furnace, is selected from the condition of ensuring the passage of gases through the closed chains of the furnace section and, depending on the values of overlapping by element 3 of the chainless corridor 6.

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The device works as follows.

During rotation of the furnace 1, the chain supports a cone-shaped element 3

5, closing the passage of gases through the chainless corridor 6, the passage of the Bdol element 3, the gas flow slides along its bonus surface and along the slopes of the V-shaped groove 5. At the same time, dust particles of the gas flow slip along the slopes of the groove 5 and accumulate in it lower part. The particles collide with each other, stick together, conglomerate.

Bypassing the cone-shaped element 3, the entire gas flow washes over the chains and transfers heat to them, thereby reducing gas tagging and heat loss from the gases leaving the furnace. When exiting the V-shaped groove, gases, along with dust, are directed towards the chains. When this comes out of the bottom of the V-shaped groove,

25, the jet contains coarse, conglomerated parts of the pygss that collide with the chains, lose speed and are deposited in the furnace.

Cone element 3 with a ditch

30 kami 5 creates different gas velocities when it is bypassed by gases, because the gas velocity is not the same around the element, the gas velocity is higher at the top than at the bottom of the groove, and the differential gas velocity during washing improves the heat transfer and spraying along the bottom of the groove 5 with a lower speed, the precipitation of the draining is improved.

Editor, A. Sabo

Compiled by T.Gubareva

Tehred.I.Gaydosh Proofreader V.Sinitska

Order 4220/38 Circulation 561 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

FIG. 2

Claims (1)

HEAT EXCHANGER OF A ROTARY FURNACE, containing a chain curtain and a cone-shaped element, freely suspended on chains eccentrically to the axis of the furnace in a working space free of the chain curtain, characterized in that, in order to intensify heat transfer and dust collection, the cone-shaped element is made with V-shaped grooves . FIG. 1