Blast furnace tuyere small sleeve leak detection device and leak detection method

Abstract

The invention relates to a blast furnace tuyere small sleeve leak detection device and a leak detection method, and belongs to the technical field of blast furnace maintenance tools. The blast furnacetuyere small sleeve leak detection device comprises a water outlet pipe and a water inlet pipe, wherein one end of the water outlet pipe and one end of the water inlet pipe respectively communicate with tuyere small sleeves; a water inlet thermometer and a water inlet flowmeter are arranged at the other end of the water inlet pipe; and a water outlet thermometer and a water outlet flowmeter are respectively arranged at the other end of the water outlet pipe. The leak detection method comprises the following steps: acquiring the temperature difference and the flow difference of cooling water of each tuyere small sleeve; comparing the temperature difference and the flow difference of the cooling water of any tuyere small sleeve with the temperature difference and the flow difference of thecooling water of other tuyere small sleeves; and if the temperature difference of the cooling water of one tuyere small sleeve is greater than the average value of the temperature difference of the cooling water of other tuyere small sleeves and the flow difference of the cooling water of the tuyere small sleeve is greater than 0.5m<3> / h, judging that a tuyere is damaged and leaks water. The blastfurnace tuyere small sleeve leak detection device is simple in structure, can quickly detect the leak of the tuyere small sleeves, and can accurately judge whether the blast furnace tuyere small sleeves are damaged or not, so that the leak detection accuracy is improved, and the leak detection workload is reduced.

Description

technical field [0001] The invention relates to a leak checking device and a leak checking method of a blast furnace tuyere small sleeve, and belongs to the technical field of blast furnace maintenance tools. Background technique [0002] The small blast furnace tuyere is an important equipment in the blast furnace air intake system, and its function is to send hot air into the blast furnace. During the normal production of the blast furnace, the small tuyere casing will be damaged and leak due to the erosion of the coal flow of the coal gun or the contact with molten iron. Flowing into the hearth will affect the heat balance of the hearth and may even cause a vicious accident of furnace cooling. At present, the well-known leak detection methods of the small tuyere cover are: 1. On-site inspection and confirmation method: when water marks appear in the tuyere or the iron gate, carry out on-site investigations one by one for each tuyere, close the water inlet valve of the tu...

AI Technical Summary

Problems solved by technology

During the normal production of the blast furnace, the small tuyere casing will be damaged and leak due to the erosion of the coal flow of the coal gun or the contact with molten iron. Flowing into the hearth will affect the heat balance of the hearth and may even cause a vicious accident of furnace cooling

At present, the well-known leak detection methods of the small tuyere cover are: 1. On-site inspection and confirmation method: when water marks appear in the tuyere or the iron gate, carry out on-site investigations one by one for each tuyere, close the water inlet valve of the tuyere small set, and observe the tuyere. Whether there is panting phenomenon in the water outlet of the small set, and then judge whether it is leaking. This method lags behind the confirmation of the leak of the small set of the tuyere, and the workload is large, and the accuracy is not high; 2. The method of observing the flow meter combined with on-site confirmation: When the flow difference between the water inlet pipe and the water outlet pipe increases, close the water inlet valve of the small tuyere sleeve, and observe whether there is panting phenomenon in the outlet water of the small tuyere sleeve to judge whether there is water leakage. Although the workload of this method is reduced, but due to the Misjudgments often occur due to the influence of debris in the cooling water, and the accuracy is poor

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