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Positioning method and monitoring system for blast furnace tuyere water leakage

A positioning method and tuyere technology, applied in the direction of tuyere, improving energy efficiency, improving process efficiency, etc., can solve problems such as affecting the normal production of blast furnaces, damage to small sets of tuyere, water leakage, affecting the heat balance of hearth, etc., to prevent misjudgment, reduce The effect of artificial and stable furnace conditions

Pending Publication Date: 2022-08-02
SHAGANG GROUP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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
[0003] Water leakage at the tuyere will affect the normal production of the blast furnace, increase the coke ratio and decrease the activity of the hearth

Method used

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  • Positioning method and monitoring system for blast furnace tuyere water leakage
  • Positioning method and monitoring system for blast furnace tuyere water leakage
  • Positioning method and monitoring system for blast furnace tuyere water leakage

Examples

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Effect test

Embodiment 1

[0036] The present invention provides a technical solution, a method for locating water leakage from a blast furnace tuyere, comprising the following steps:

[0037] A method for locating water leakage at a blast furnace tuyere, comprising the following steps:

[0038] S1: data collection: collect the liquid level data of each tuyere expansion tank of the blast furnace and the liquid level data of the tuyere; collect the hydrogen content in the blast furnace top gas; collect the carbon monoxide and carbon dioxide content in the blast furnace top gas; count the fuel ratio of each shift;

[0039] S2: Data analysis, water leakage judgment:

[0040] Condition 1: The water replenishment period is less than the normal water replenishment period, and the liquid level of the tuyere is lower than the normal range by more than 0.3m;

[0041] Condition 2: The hydrogen content in the blast furnace top gas is greater than 4.0%;

[0042] Condition 3: Gas utilization rate η co Decrease 1%...

Embodiment 2

[0056] A monitoring system for a method for locating water leakage at a blast furnace tuyere, comprising a data acquisition module, a data analysis module and a data display module, the data acquisition module and the data display module are respectively connected with the data analysis module, and the data acquisition module comprises a liquid level gauge, a chromatograph Analyzer, flowmeter and thermocouple temperature sensor, liquid level gauge is installed on the expansion tank and tuyere of the tuyere, the chromatographic analyzer is installed on the top of the blast furnace, the flowmeter is installed on the cooling water inlet and outlet pipes, and the thermocouple temperature sensor is installed on the On the cooling wall of the tuyere, the data display module is used to receive the data of the data analysis module and display it in real time.

[0057] Further, the data analysis module adopts a single-chip microcomputer, and the data display module adopts a display scre...

Embodiment 3

[0059] refer to Figure 1-8, The present invention provides a technical solution. On the basis of Examples 1 and 2, a 5800 blast furnace in Shagang has 40 tuyere. On September 10-12, 2020, the data showed that the following problems occurred: 1. The water replenishment period was shortened ,See figure 1 ; 2. The H2 content of the furnace top is greater than 4%, see figure 2 3. The utilization rate of gas decreases, see image 3 ; 4. Fuel ratio increased, see Figure 4 ; Comprehensively judge the leakage.

[0060] By displaying the data, the flow difference between No. 15 and No. 30 tuyere reaches 10m 3 / h or more, where Figure 5 It is an example of the normal flow difference data map of No. 3 tuyere, Image 6 This is the data map of the flow difference of the No. 15 tuyere, it can be seen that the flow difference of the tuyere reaches 13m 3 / h, at the same time, the on-site inspection found that the No. 15 tuyere had water stains. Through on-site verification, after t...

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Abstract

The invention discloses a blast furnace tuyere water leakage positioning method and monitoring system, and belongs to the technical field of blast furnace ironmaking, and the method comprises the following steps: data acquisition, data analysis, water leakage determination and water leakage tuyere positioning; according to the implementation process that water leakage judgment is conducted firstly and then water leakage positioning is conducted, the accuracy can be effectively improved, unnecessary resource waste is reduced, and the method is more scientific and efficient; the judgment is combined with four conditions to prevent misjudgment; when the tuyere is damaged, whether the tuyere leaks water or not can be found in the first time, and the tuyere can be replaced in time, so that the stability of the furnace condition is ensured, and the device is suitable for large-area popularization.

Description

technical field [0001] The invention belongs to the technical field of blast furnace ironmaking, and relates to a method for locating water leakage at a blast furnace tuyere. Background technique [0002] The small set of blast furnace tuyere is an important equipment in the blast furnace air inlet system, and its function is to send hot air into the blast furnace. When the blast furnace is in normal production, the small tuyere cover will be damaged and leaking due to the scour of the coal gun coal flow or the contact with molten iron. The flow into the hearth will affect the heat balance of the hearth and may even cause a vicious accident of furnace cooling. [0003] Water leakage at the tuyere will affect the normal production of the blast furnace, increase the coke ratio and decrease the hearth activity. How to find and deal with the leakage of blast furnace cooling equipment in time is very important for the normal production of blast furnace and the safety of equipme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B7/10C21B7/16C21B7/24
CPCC21B7/103C21B7/16C21B7/24Y02P10/25
Inventor 张少波韩旭杜屏卢瑜
Owner SHAGANG GROUP
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