SU467122A1 - Compensator for hot blast blast furnace air duct - Google Patents

Description

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The invention relates to the field of ferrous metallurgy, to the arrangement of lined pipelines operating under the conditions of high temperatures and pressure to blow and can be applied to hot air ducts to blow blast furnaces.

A known construction of a compensator with straps serving as limiters for stretching the compensator from the effect of the internal pressure of the medium. These compensators are suitable at elevated heat carrier pressure, do not require maintenance, have no leaks, but require the creation of powerful dead supports for receiving the thrust force (for structures of air ducts, hot blows on the outlet 19-20 m horizontal forces can reach 350-400 tons).

In order to improve the service conditions of the air duct, the proposed compensator is closed with two or more cooled gas backpressure chambers.

The drawing shows a schematic compensation device in section.

The compensation device includes a pipeline 1 with a lens compensator 2, annular back pressure chambers 3 with supplying gaseous cooling medium tubes 4 and devices 5 for maintaining a constant pressure value

these cameras; annular cooling chambers 6 with openings 7 and discharge tubes 8 for glands 9, glands 10 with stoppers II; ti 12; ring stops 13, reinforced

ribs; refractory lining 14 with temperature joints 15, performed by scrambling through lining layers in the area of lens compensator 2, and screen 16 of lens compensator.

Lens compensator 2 dampens operational variables by the magnitude of the axial elongation of the pipeline 1, and the temperature seams 15 are similar to the displacement of the lining 14, the axial spread from the internal pressure

heat carrier and linings are constantly perceived by the thrues 12, placed symmetrically with respect to the cross-section of the pipeline (the number of tons is determined by calculation) attached to the ribs of the annular stops 13,

located on pipeline 1 and on all annular chambers 3 into which a cooling gaseous medium under pressure is supplied through pipe 4, its magnitude is determined by calculation depending on the size and number of chambers 3, the magnitude of the blowing in pipeline 1, taking into account frictional forces and elastic resistance. lens compensator 2. Gas is discharged through the openings 7 of the annular chamber 6, which serves to cool the glands 9, through the tubes 8. The pressure in the chambers 3 is maintained automatically by the devices 5, which are activated when the pressure of the cooling gas is reduced or increased. Stonors 11 glands 10 limit the amount of deformation of the lens compensator 2 in its calculated compensation limits.

The proposed compaction device is reliable in operation, does not require the creation of bulky dead supports, does not fail during temporary interruptions in the cooling supply, and allows for the necessary repair of the glands 9, 10 in chambers 3 alternately, i.e. when transferring other chambers to the correspondingly increased pressure of the gas medium / j

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Dy Possible cooling gas leaks through the glands 9, io chambers 3 do not affect the performance and reliability of the proposed compensation device.

Subject invention

A compensator for an air duct for a hot blast of a blast furnace, containing a corrugated lens with a screen, stops connected by rods, characterized in that, in order to improve the conditions of the service of the duct, one of the stops tee is made in at least two moving annular chambers backpressures with cooled glands and retainers for moving stops.

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