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Online automatic cleaning device of blast furnace coal injection system and control method of online automatic cleaning device

A blast furnace coal injection and automatic cleaning technology, applied in blast furnaces, blast furnace details, furnaces, etc., can solve problems such as increased main pressure, pipeline blockage, and impact on blast furnace production efficiency, so as to reduce error operations, improve production efficiency, and reduce labor costs. intensity effect

Pending Publication Date: 2022-04-12
阿尔法(江苏)重工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the operation of the blast furnace coal injection system, due to the large amount of light impurities in the raw coal, the filter of the injection main pipeline needs to be cleaned frequently during use
If it is not cleaned in time, it will cause the pressure of the main pipe to increase, which will cause blockage inside the pipe and seriously affect the production efficiency of the blast furnace

Method used

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  • Online automatic cleaning device of blast furnace coal injection system and control method of online automatic cleaning device
  • Online automatic cleaning device of blast furnace coal injection system and control method of online automatic cleaning device
  • Online automatic cleaning device of blast furnace coal injection system and control method of online automatic cleaning device

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specific Embodiment 1

[0030] Specific embodiment 1 :Such as Figure 5 As shown, a control method for an online automatic cleaning device of a blast furnace coal injection system includes the following steps:

[0031](1) During the blowing process of the main pipe 1, start the inlet valve and outlet valve of the filter 2. When the pressure in front of the filter 2 is too high, the program automatically opens the two sets of second pneumatic valves before and after the spare filter 4. Ball valve 41, after repeating the switch more than 3 times and delaying for 5 seconds, close the two groups of first pneumatic ball valves 21 used to block the filter 2, first open the first slag discharge valve 25 used to block the side of the filter 2, and then open Block the first blowback valve 24 provided on the filter 2, and purge nitrogen for 35 seconds.

[0032] (2) Open the first forward blowing valve 23 provided on the filter 2 to blow for 5 seconds, then close the first forward blowing valve 23 and the fi...

specific Embodiment 2

[0033] Specific embodiment 2 :Such as Figure 5 As shown, a control method for an online automatic cleaning device of a blast furnace coal injection system includes the following steps:

[0034] (1) During the blowing process of the main pipe 1, start the inlet valve and outlet valve of the filter 2. When the pressure in front of the filter 2 is too high, the program automatically opens the two sets of second pneumatic valves before and after the spare filter 4. Ball valve 41, after repeating the switch more than 3 times and delaying for 5 seconds, close the two groups of first pneumatic ball valves 21 used to block the filter 2, first open the first slag discharge valve 25 used to block the side of the filter 2, and then open Block the first blowback valve 24 that is provided with on the filter 2, and purge for 265 seconds. Since the purge gas enters the pulverized coal bunker in a large amount, for preventing the pulverized coal bunker from having an excessively high oxyge...

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Abstract

The invention discloses an on-line automatic cleaning device for a blast furnace coal injection system and a control method of the on-line automatic cleaning device. The device is characterized in that a filter and a standby filter are mounted on a main injection pipeline, a first pneumatic ball valve, a first filter plate, a first forward blowing valve and a first reverse blowing valve are mounted on the filter, and the filter is connected with a coal injection powder return pipeline through a first connecting pipe; a second pneumatic ball valve, a second filter plate, a second forward blowing valve and a second reverse blowing valve are installed on the standby filter, and the standby filter is connected with the coal injection powder returning pipeline through a second connecting pipe. According to the control method, coal dust blowing is intelligently controlled, whether set blowing is safe or not and the blocking degree of the coal dust filter can be judged according to the pressure difference generated before and after the filter, and then corresponding treatment is conducted in time; the automatic blowback cleaning filter does not need to be attended when being used, so that the labor intensity of workers is greatly reduced, the manual error operation is also reduced, and the production efficiency is effectively improved.

Description

technical field [0001] The invention relates to a facility for automatically cleaning blast furnace coal powder, in particular to an online automatic cleaning device for a blast furnace coal injection system and a control method thereof, belonging to the technical field of metallurgical automatic control. Background technique [0002] Blast furnace pulverized coal injection is a major technology in the continuous and rapid development of ironmaking in the world. Its main purpose is to expand the source of blast furnace fuel in the process of blast furnace smelting, and inject pulverized coal into the blast furnace from the tuyeres to obtain low-cost pulverized coal. Replace the expensive metallurgical coke, improve the operating conditions of the blast furnace, and improve the adjustment means of the blast furnace, so as to achieve the ultimate goal of saving coke and increasing production. Therefore, expanding blast furnace coal injection technology is in line with the long...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B5/00
Inventor 邱宏武麻洁孙家发姚国强
Owner 阿尔法(江苏)重工科技有限公司