Method for confirming damage of cooling water pipe of blast furnace cooling wall

Abstract

The invention relates to a method for confirming damage of a cooling water pipe of a blast furnace cooling wall. The method comprises the following steps of: 1) preparing a wind belt before damping down a blast furnace, one end of the wind belt is connected with a blast furnace compressed air pump, the other end of the wind belt is connected with a three-way joint through a valve, a pressure meter is arranged at one side of the three-way joint and a connector is arranged at the other side of the three-way joint; 2) leading out each section of cooling water pipe which needs to be molded after damping down the blast furnace and when the furnace body has no coal gas; 3) utilizing water draining valves of the cooling water pipe to connect the wind belt onto the water draining valves of the cooling water pipe, and molding section by section according to the molding requirements; 4) confirming the damaged cooling water pipe after the molding, changing the pipe to communicate with industrial clean circulation water. Compared with the prior art, the method disclosed by the invention has the beneficial effects that the method has the characteristics of low cost, simple structure, reasonable design, convenience in use, high accuracy and high practicability; and moreover, cooling effects of other cooling walls are not affected, at the same time, the damaged cooling wall can be checked rapidly and effectively, and corresponding measures can be taken in time, so as to improve working efficiency.

Description

technical field [0001] The invention relates to a method, in particular to a method for confirming damage of a cooling water pipe of a cooling wall of a blast furnace. Background technique [0002] In the normal production process of the blast furnace, due to the corrosion and wear of the furnace charge, the change of the furnace temperature, the thermal stress of the furnace skin and the stave, the damage of the stave is very easy to occur, and the damage of the stave will leak water into the furnace. Increase the coke ratio of the blast furnace, affect the formation of the furnace lining, reduce the cooling water in the cooling system and cause more water replenishment in the system. The previous control measures are to reduce the water pressure and water volume of the damaged cooling water pipe to control water leakage into the blast furnace. The reduction of water volume causes the water volume of other cooling water pipes connected in series with the damaged cooling wat...

AI Technical Summary

Problems solved by technology

[0002] In the normal production process of the blast furnace, due to the corrosion and wear of the furnace charge, the change of the furnace temperature, the thermal stress of the furnace skin and the stave, the damage of the stave is very easy to occur, and the damage of the stave will leak water into the furnace. Increase the coke ratio of the blast furnace, affect the formation of the furnace lining, reduce the cooling water in the cooling system and cause more water replenishment in the system. The previous control measures are to reduce the water pressure and water volume of the damaged cooling water pipe to control water leakage into the blast furnace. The reduction of water volume causes the water volume of other cooling water pipes connected in series with the damaged cooling water pipe to decrease, which reduces the cooling intensity and shortens the service life of other cooling water pipes. Due to the reduced cooling intensity of the stuck cooling water pipe, the heat flow intensity of the surrounding cooling water pipes increases. Make it easy to break, causing certain safety hazards to production

[0003] At present, the closed-circuit cooling system of Angang’s new blast furnace is closed-circuit soft water or demineralized water. Damaged cooling walls will cause loss of soft water or demineralized water. We can only find out the damaged cooling water pipes of damaged cooling walls during the blast furnace shutdown period and replace them with industrial cleaning water. Ring water to reduce the loss of water in the cooling system. However, it is possible to find out which string of cooling water pipes is damaged during normal production. Due to the working environment and actual conditions on site, it is impossible to find out the specific damaged parts of the cooling water pipes. It can only be found during the wind break. It is extremely difficult to find damaged cooling water pipes when the wind is off, and the pipeline can only be cut for confirmation at the beginning of the wind down. At this time, there is still residual gas, which poses a certain safety hazard. This problem needs to be resolved

Images