Corrugated expansion joint of blast furnace air inlet device
A technology of air inlet device and corrugated pipe, which is applied in the direction of expansion compensation device, tuyere, pipe components, etc. for pipelines, and can solve the problems of high temperature at the bellows and loss of function of the bellows compensator, etc.
Active Publication Date: 2008-07-23
SHILIN LUOHE METALLURGY EQUIP
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Problems solved by technology
However, working in a high-temperature environment for a long time, affected by heat conduction and heat convection, often causes the temperature at the bellows to be too high, and various sealing technologies such as square or round refractory fiber ropes used in the original design will gradually reduce or lose their effectiveness. Due to the proper sealing effect, the bellows compensator loses its function due to long-term harsh environmental impact and damage
Method used
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Embodiment Construction
[0008] Embodiments of the present invention will be described below in conjunction with the accompanying drawings.
[0009] The bellows compensator is mainly composed of damping net 2, two sets of upper and lower special-shaped damping nets and their blocking rings 4, 8, heat insulation ring with refractory fiber ring and its damping ring 5, corrugated heat insulation ring with refractory fiber ring 7 and corrugated Tube 6 and so on.
[0010] The damping net 2 is made of SUS321 coated zirconium refractory fiber material, which fits with the spherical surface of the lower part of the guide tube 3 of the hot air passage, and is a spherical damping net 2, which is placed between the guide tube 3 and the refractory lining 1; Both the net and its blocking ring adopt U-shaped damping net and its blocking ring 4, 8. The lower U-shaped damping net and its blocking ring 4 are located above the outer edge of the spherical damping net 2, and the lower ring is made of SUS321 coated zircon...
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Abstract
This blasting device of BF corrugated-pipe compensator adopts the damping labyrinth sealing structure. This sealing facility is between refractory lining of warm air pipe and draft tube and corrugated-pipe. What located in turn are damping net connected with draft tube, two sets of special shaped damping net and retaining ring, thermal insulating band and refractory fiber ring, damping ring and corrugated- thermal insulating band and refractory fiber ring. Under the airflow in warm air pipe, the damping net first block the warm air, then the lower special shaped damping net and special shaped retaining ring blocks the remaining warm air. The upper special shaped daming net blocks the leaked warm air. Then the special shaped retaining ring block it again. After two times of blockage of two sets of damping net and retaining ring as well as the last damping ring and thermal insulating band and refractory fiber ring, to isolate the empty place of corrugated-pipe and air pipe with excellent thermal insulating effect. The testing result shows that the surface temperature of corrugated-pipe is lower than 80DEG C and the compensation effect is ideal.
Description
Technical field [0001] The invention relates to a bellows compensator used in an ironmaking blast furnace air intake device. Background technique [0002] The blast furnace air inlet device (or air supply branch pipe) is a device that sends the hot air near 1300 °C in the hot air surrounding pipe into the blast furnace through the tuyere small sleeve. The bellows compensator is used to absorb heat expansion and contraction, blast furnace deformation, etc. The size change of the air inlet device caused by the cause. Due to the needs of structural design, there is a space in the bellows used at present to connect with the hot air channel. In order to make up for this structural defect, a variety of refractory fiber sealing technologies are used in the design. However, working in a high-temperature environment for a long time, affected by heat conduction and heat convection, often causes the temperature at the bellows to be too high, and various sealing technologies such as s...
Claims
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IPC IPC(8): C21B7/16F16L51/02
Inventor 林留柱冯力李云超赵泽立杨国良赵进忠周永雷辛俊杰
Owner SHILIN LUOHE METALLURGY EQUIP