Method for leakage detecting and handling of blast furnace soft water closed circulating cooling system

Abstract

The invention provides a method for the leakage detecting and handling of a blast furnace soft water closed circulating cooling system. Through the liquid level difference variation of an expansion tank of a soft water system, the coal gas pressure direction in the expansion tank or a degassing tank can be detected, the phenomenon of bubbles or white turbidity is generated in water flow in a flap flowmeter on a cooling wall of the closed circulating cooling system; during the process that the pH value is continuously and slowly reduced, seepages of water stain and mirabilite can be judged to be generated on an eye plate of a blast furnace shell, so that the judgment shows that the cooling wall or an inner wall of a pipeline is damaged; the flap flowmeter is then utilized, the damage point location of a cooling wall water pipe is determined, and longitudinal treatment is carried out; and a pressure gauge installation pressing leakage detection method is utilized to determine the damage point location of the cooling water pipe, and the lateral treatment is carried out. By the method, the working efficiency is increased, the labor intensity is reduced, leakage points can be found out and treated in real time, and solid foundation is laid for the safety, success production and stable production of a blast furnace.

Description

technical field [0001] The invention relates to the leak detection test and disposal of the soft water closed cycle cooling system of the blast furnace. The method is simple, fast and accurate, and has important practical and popularization value. Background technique [0002] After the cooling system (cooling wall, large and middle casing) in the soft water closed circulation cooling system of the blast furnace is damaged, it is usually used to check the leak by pressing the pressure gauge or lighting the gas fire to determine whether the cooling wall in the cooling water pipeline is damaged. However, due to the large number of staves, large and middle sets, there are about 700 staves, which are divided into 16 layers. 10. There are 43 cooling water pipes in the back pipe of the stave on the 11th floor, and there are a total of 283 cooling water pipes that need to be suppressed; under normal production conditions, use the pressure gauge to suppress the leak detection method...

AI Technical Summary

Problems solved by technology

[0002] After the cooling system (cooling wall, large and middle casing) in the soft water closed circulation cooling system of the blast furnace is damaged, it is usually used to check the leak by pressing the pressure gauge or lighting the gas fire to determine whether the cooling wall in the cooling water pipeline is damaged. However, due to the large number of staves, large and middle sets, there are about 700 staves, which are divided into 16 layers. 10. There are 43 cooling water pipes in the back pipe of the stave on the 11th floor, and there are a total of 283 cooling water pipes that need to be suppressed; under normal production conditions, use the pressure gauge to suppress the leak detection method or the gas fire method to detect leaks, and at least 4 people are required to watch the water It takes about 10 minutes to press and leak each cooling water pipe at the same time. Every time the cooling wall of the furnace soft water system is pressed (longitudinal) for leak detection, all the cooling water pipes need to be pressed one by one. Check for leaks twice to confirm that all leaking cooling water pipes have been checked out, so it takes at least about 5660 minutes to complete; the above two methods for leak checking are labor-intensive, labor-intensive, and time-consuming. Leakage points lead to vicious accidents such as freezing of the water inlet hearth in the furnace; in addition, the gas concentration in the furnace body of the blast furnace is about 500ppm, and there is a great potential safety hazard when personnel detect leaks; Leakage technology requires 566 times of drainage, and a large amount of soft water is discharged, which affects the energy-saving and consumption-reducing indicators of the enterprise