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A method of temperature measurement after the blast furnace air temperature couple is damaged

An air temperature and galvanic couple technology is applied in the field of temperature measurement after the blast furnace air temperature galvanic couple is damaged, which can solve problems such as affecting normal production, and achieve the effects of smooth and fast insertion, convenient and fast installation and welding, and guaranteed accuracy.

Active Publication Date: 2019-04-05
MAANSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem that the existing two air-temperature couples are all damaged and forced to stop the wind to replace the couples, thus affecting normal production, the present invention provides a temperature measurement method after the blast furnace air-temperature couples are damaged, which can accurately measure the temperature of the hot air pipes. Air temperature is the basis for the interlocking adjustment of the opening of the air mixing valve to ensure that the blast furnace can be operated normally without stopping the wind

Method used

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  • A method of temperature measurement after the blast furnace air temperature couple is damaged

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Embodiment 1

[0037] The temperature measuring method after the blast furnace air temperature couple of the present embodiment is damaged includes the following specific steps:

[0038] Step S101, select the coal injection gun 3 used in the blast furnace closest to the hot blast main pipe 1, pull out the coal injection gun 3 and cut off the tail flange of the coal injection gun 3, cut the tail port of the coal injection gun 3 flat, and then clean the coal injection gun 3 The deposits inside and outside are polished with sand to make the inner wall of the coal injection gun 3 smooth. Since the blast furnace has multiple coal injection guns 3, taking out one of them will not affect the blast furnace. In addition, the coal injection gun 3 and the coal gun road Unfixed seal, easy to pull out;

[0039] Step S102, select a hollow screw whose size matches the installation size of the thermocouple 4, and weld the hollow screw concentrically to the coal injection gun 3 with the tail flange cut off, ...

Embodiment 2

[0046] The temperature measurement method of the blast furnace air temperature couple damaged in this embodiment, the steps are basically the same as in Example 1, and the present invention is applied to actual production. When the two air temperature couples are all damaged, first measure the hot blast main pipe 1 to measure The actual pipeline distance L between the point and the insertion point of the coal injection gun 3, for example L=1.9m, when t=1010°C, the air temperature of the hot blast main pipe T=t+1.9*55=1114.5°C.

[0047] In contrast, when the two air temperature couples are all in good condition, the air temperature of the hot air main pipe is T = 1121°C, and the error of the two data is 0.59%, which meets the production requirements.

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Abstract

The invention discloses a temperature measuring method after a blast furnace wind-temperature couple is damaged, and belongs to the technical field of temperature measurement. The method comprises the steps of: selecting a coal injection gun, pulling out the coal injection gun and cutting off the tail flange of the coal injection gun; selecting a hollow screw rod, and welding the hollow screw rod to the coal injection gun; inserting a thermocouple into the coal injection gun; Insert a coal injection gun with a thermocouple into the coal gun channel; connect the thermocouple wire to the line, and the temperature value t is fed back to the system computer, and the system computer corrects and compensates the temperature value t to obtain the air temperature T of the hot air pipe. This method makes full use of the positional relationship between the coal injection channel and the hot air branch pipe. When the two air temperature couples are all damaged, the temperature of the hot air in the hot air branch pipe is measured, and the value of the hot air temperature is corrected and compensated to obtain The more accurate air temperature of the hot blast main pipe is effectively the basis for the interlocking adjustment of the opening of the air mixing valve to adjust the air temperature, and realizes that the blast furnace can still be produced normally without stopping the wind.

Description

technical field [0001] The invention belongs to the technical field of temperature measurement, and more specifically relates to a method for measuring temperature after a blast furnace air-temperature couple is damaged. Background technique [0002] Each blast furnace has a hot blast main pipe, and each hot blast main pipe has two blast furnace hot blast temperature measurement points. Each blast furnace needs to measure the hot blast temperature. The accuracy of the hot blast temperature is an important indicator to ensure normal and stable operation. In blast furnace production, there are mainly contact measurement methods and non-contact measurement methods for measuring blast furnace hot air temperature, among which non-contact measurement methods include thermal imaging. The temperature detection method of the hot air pipe with optical fiber includes a distributed optical fiber sensor and a distributed optical fiber. The distributed optical fiber is wound on the hot ai...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B7/24C21B5/00
Inventor 马群聂长果高广静
Owner MAANSHAN IRON & STEEL CO LTD
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