SU1235955A1 - Device for recovering sinter heat - Google Patents

Description

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The invention relates to the production of iron ore in ferrous metallurgy, namely to the design of conveyor units for the production of sinter.

The aim of the invention is to reduce energy consumption by extracting and using heat from recirculating gases at elevated temperatures.

Figure 1 shows the temperature distribution and filtration rate of gases across the width of the shelter of cooler 5 in FIG. 2, the change in relative temperature from the gap; FIG. 3 is a diagram of a device for utilizing heat of an agglomerate.

The device consists of an external cooler 1 of sinter, duct 2, cap 3, duct 4, duct 5, smoke exhausters b and 7, separators 8 and 9 (system, no heat is shown).

Based on the study of the operation of the OP-315 cooler, data were obtained on the velocity and temperature distribution of the gas flow from the agglomerate layer across the width of the hood (Fig., Curves 1 and 2 are the numbers of the blast chambers over which you would measure), which showed that heat recovery, it is advisable to use only gases extracted from the central sections of the layer at a distance from the longitudinal walls of the cap; and, due to the high dust content and low temperature

tours of gases passing alongside. From the data presented in FIG. 2, the quantitative size of the gap between the longitudinal walls of the box and the cap can be determined. Indeed, it cannot be less than 0.08 of the width of the cap. Otherwise, the temperature of the sucked gases decreases sharply (by 10-20% or more). The upper limit of the size of the longitudinal gap is 0, 15 width, cap. A further increase in the size of the gap leads to a very small (by 1.5-2.0%) temperature increment of suction gases while reducing their number.

The device works as follows.

Filtered through a layer. A mountain of which the agglomerate on the first two blast chambers of the cooler 1 refrigerant-air due to physical heat

five

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5 o

five

five

d

five

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The material is heated until. This gas is sucked through a duct 4 with an autonomous gas suction system consisting of dp: pump 7, dust collector 9, gas duct 5, and fed to the heat utilization system (for example, to the interstate horn of an incendiary horn sintering machine). Cooling air passing through the sinter layer and having a lower temperature, cold air flowing between the aspiration hood and sides of the cooler carts, as well as excess suction gases, are taken through the hood 3, and through the duct 2, the dust collector 8 is discharged with smoke exhausters into the asphalt system.

The described operation mode of the device for heat recovery of the agglomerate and the whole sintering machine as a whole is possible with the following structural relationships.

A large clearance between the side walls of the cap 3 and the side walls of the box 4 is made equal to 0.10 of the width of the cap 3, thereby eliminating the possibility of side-blowing in the box 4 to suck gases. Applied to an AKM-312 machine equipped with an external cooler of the type OP-315 with a width of 3.5 m (width of the aspiration hood -3.6 m), the longitudinal gap is 0.15.3.6 - 0.54 m. The length of the longitudinal gap can only be reduced to 0.08t from the width of the 1-gee cap 3. Further, U1-the loss of the gap leads to side-blowing in the duct 4: lowering the temperature of the sucked gas by 40 ° C,

GWE The longitudinal gap can only be fed up to 0.15 of the cap 3 width. Increasing the gap size of more than 0.15 leads (in terms of suction of gases without onboard products) to decrease in the amount of gases exhausted with a temperature of 500 ° C by 16% to a corresponding decrease in the thermal efficiency of the unit.

The invention provides air supply to the top-leveling devices of the aglo-worm as compared with the prototype at llO-nO C. higher. An increase in the temperature of air preheating for every 100 ° С ensures a reduction in the consumption of gaseous fuel by 7–8% and an increase in the associated gas in

312359554

by 0.7-0.8% (abs.). The latter is a solid fuel by 0.7–0.8% and will lead to an increase in productivity by identifying the strength index of the sinter machine by 0.6%, a reduction in the expenditure on impact by 0.3–0.4% (abs. ).

About 0.3 0.6 Q9 1.2 1.5 1.8 1.8 2.1 2, 2.7 5.0 JJ S, 6 Shelter width of the cooler, 1

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HQS C1 0.15 C2 a, S From the same value of the magnitude

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Unloading

Editor P.Kossey

Compiled by A. Blizshok

Tehred V. Kadar Proofreader m.Maksimishinets

Order 3064/25 Circulation 567 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

Claims (1)

DEVICE FOR DISPOSAL OF HEAT OF Agglomerate, comprising a remote and external sinter cooler with an aspiration system consisting of a smoke exhauster, gas ducts, dust collector and hood installed above the cooler, and a heat utilization system, characterized in that, in order to reduce energy consumption by selection and use heat of recirculation gases with an elevated temperature, it is equipped with a duct with an autonomous heat utilization system, while the duct is installed inside the hood with a longitudinal clearance from its side walls of 0.08-0, I5 ri- <g us cap. SU (11) 1235955 X