Blast furnace cooling wall casing gas plugging device and working method

Abstract

The invention provides a blast furnace cooling wall casing gas plugging device and a working method. The blast furnace cooling wall casing gas plugging device comprises a blast furnace, a cooling water pipe extending into the interior of blast furnace as well as a ripple compensator connected with blast furnace and cooling water pipe, the cooling water pipe penetrates through the blast furnace wall of the blast furnace, the ripple compensator sleeves the cooling water pipe, and one end of the ripple compensator is fixed to the blast furnace wall so as to seal the joint between the cooling water pipe and the blast furnace wall; and the cooling water pipe is provided with a sealing part in a sleeve mode, one end of the sealing part is fixed to the cooling water pipe through the fixing part,and the other end of the sealing part is fixed to the ripple compensator through the fixing part and is used for forming an annular seal between the sealing part and the cooling water pipe. Accordingto the blast furnace cooling wall casing gas plugging device, leakage treatment of the blast furnace body is achieved under the condition of without fire, the designed sealing leather bag is long in service life through adopting the rubber material, the rubber material has flexibility, and the relative displacement between the cooling wall and the furnace body does not cause damage to the device.

Description

technical field [0001] The invention relates to the technical field of blast furnace maintenance, in particular to a blast furnace cooling wall casing gas plugging device and a working method. Background technique [0002] Casing gas leakage in cooling stave of blast furnace body is a relatively common abnormal phenomenon in blast furnaces in various ironworks. During the production process of the blast furnace, the temperature of the blast furnace shell is lowered by the circulation of water inside the stave, and the water pipe of the stave passes through the furnace shell, and the corrugated compensator is used to seal between the two. There is a relative displacement with the furnace body, and the corrugated compensator of the cooling water pipe is affected by temperature changes, and there is also a small amount of deformation displacement. Over time, it will be fatigued and damaged, resulting in gaps, which will eventually cause gas leakage in the furnace body. On the o...

AI Technical Summary

Problems solved by technology

During the production process of the blast furnace, the temperature of the blast furnace shell is lowered by the circulation of water inside the stave, and the water pipe of the stave passes through the furnace shell, and the corrugated compensator is used to seal between the two. There is a relative displacement with the furnace body, and the corrugated compensator of the cooling water pipe is affected by temperature changes, and there is also a small amount of deformation displacement. Over time, it will be fatigued and damaged, resulting in gaps, which will eventually cause gas leakage in the furnace body. On the one hand, gas leakage is a safety hazard. On the other hand, the gas mixed with dust washes the cooling water pipe, causing equipment damage

Moreover, the concentration of gas in this part is high, and hot work cannot be carried out. It is difficult to deal with the leakage by the commonly used plugging methods, so it can only be dealt with by using the blast furnace shutdown machine.

[0003] There are generally two types of existing plugging methods: 1. Weld the leakage point; 2. Use ring-shaped steel plates to weld and seal the outer cover of the cooling water pipe corrugated compensator; the existing plugging methods cannot be operated in high-concentration gas environments. fire operation

Moreover, excessive welding repair cannot be performed when repairing the leakage point, otherwise the corrugated compensator will not be able to compensate

Due to the relative displacement between the cooling stave and the furnace body, the welding repair point maintains a short period of time to cause secondary leakage. The existing technology can only be repaired repeatedly, and cannot completely solve the problem of gas leakage.

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