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Blast furnace blower redundancy anti-surge control method

A control method and blower technology, applied to blast furnaces, blast furnace details, blast furnace parts, etc., can solve problems such as unstable operation

Active Publication Date: 2010-10-06
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] According to the inherent characteristics of the axial flow fan, when the blast flow rate is lower than a certain limit value (for a certain wind pressure), the operation will be unstable

Method used

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  • Blast furnace blower redundancy anti-surge control method
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Embodiment Construction

[0035] see Figure 1 ~ Figure 3, the blast furnace blower redundant anti-surge control method of the present invention, the atmosphere is sent into the dehumidifier 2 through the air filter 1, the humidity in the air is reduced, and the oxygen (oxygen-enriched) required by the blast furnace enters the blower 4 through the oxygen mixer 3, To improve the combustion efficiency of the hot blast furnace of the blast furnace, the air is pressurized in the blower 4 and then sent to the blast furnace through the check valve 5, the anti-blocking valve 6 and the discharge valve 7. A connecting pipeline with a rapid decompression valve 11 and a corresponding rapid decompression valve regulator are connected between the pipelines connecting the outlet main pipe of the blower fan 4 to the blast furnace and the exhaust muffler 10 respectively;

[0036] see Figure 4 , Image 6 , during normal operation, the setting value SV1 of the rapid decompression valve regulator 12 is higher than the...

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Abstract

The invention relates to a blast furnace blower redundancy anti-surge control method, a connecting pipeline with a rapid pressure reducing valve and a corresponding rapid pressure reducing valve regulator are connected with the pipelines of a blast furnace and an air release silencer respectively connected with the main pipe of a blower outlet; when in normal operation, the set value SV1 of the rapid pressure reducing valve regulator is higher than the air supply pressure P3 value of a blower, i.e. P3 is less than SV1, and the rapid pressure reducing valve is in a full closed state; and when the blast furnace abnormally operates, the air volume can not smoothly penetrate through a blast furnace material layer, thereby the rapid rise of the P3 value is caused, i.e. P3 is more than SV1, the rapid pressure reducing valve is opened, the air is released through the air release silencer, and the air supply pressure P3 value is decreased. In the invention, the rapid pressure reducing valve is added and used for controlling the pressure limit line of the blower, the highest limitation of the blower outlet pressure is ensured in the fault state of an anti-surge control system, the safety coefficient of the anti-surge control system is increased, and the double-insurance control mode can better ensure the safe and stable operation of the blower.

Description

technical field [0001] The invention relates to a control method for a blast furnace blower, in particular to a redundant anti-surge control method for a blast furnace blower. Background technique [0002] The blast furnace blast directly serves the blast furnace production, and is the core power equipment in the ironmaking process of metallurgical enterprises. The normal production of the blast furnace is based on the air volume. When the blast furnace is operating at a constant air volume, the air pressure will change with the state of the materials in the furnace. The condition of the furnace will determine the air pressure. [0003] see figure 1 , which shows the working principle diagram of the axial blower. The atmosphere is sent to the dehumidifier 2 through the air filter 1 to reduce the humidity in the air, and the oxygen (enriched oxygen) required by the blast furnace passes through the oxygen mixer 3 and enters the blower 4 to improve the combustion efficiency o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B9/10
Inventor 朱建东谢建中
Owner BAOSHAN IRON & STEEL CO LTD
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