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In-line moniting controlling system of blast furnace coal powder injection

A monitoring control and blast furnace coal injection technology, applied in the field of blast furnace coal injection system, can solve the problems of large influence, low sensitivity, and inability to clear and block coal injection branch pipes, and achieve the effects of simple configuration, high sensitivity and reliable monitoring performance.

Inactive Publication Date: 2005-06-08
SHOUGANG CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method has low sensitivity and is greatly affected by the external environment and working conditions, and can only obtain an approximate judgment and alarm for the working state of the coal injection branch pipe through temperature detection, and cannot clean the blocked coal injection branch pipe. Blocking

Method used

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  • In-line moniting controlling system of blast furnace coal powder injection

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Embodiment Construction

[0010] exist figure 1 In the process, the pulverized coal is sprayed into the blast furnace through the coal injection main pipe 7, the pulverized coal distributor 6, the coal injection branch pipe 5 and the spray gun 8. Set a pressure detection point on the coal injection main pipe 7 before the pulverized coal distributor 6, install the coal injection main pipe pressure transmitter 1, set a pressure detection point on the coal injection branch pipe 5 before the spray gun 8, and install the coal injection branch pressure The transmitter 2 and the transmission wire 12 transmit the pressure detection signal to the I / O module 3 , and the I / O module 3 is connected to the PLC 4 . The electric cut-off valve 11 of the coal injection branch pipe is installed on the coal injection branch pipe 5 at the outlet of the coal powder distributor 6, and the purge solenoid valve 10 is installed on the connecting pipe between the nitrogen purge ring pipe 9 and the coal injection branch pipe 5. ...

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Abstract

An in-line coal-spraying monitoring system of blast furnace for monitoring the blocked coal-spraying branch pipe and automatically unblocking it by scavenging the branch pipe and its electromagnetic valve is composed of a pressure detecting system with pressure transducers arranged on coal spraying trunk and each branch pipe, a signal transmission system, a PLC control system for receiving the pressure signals of coal spraying trunk and branch pipes and determining the blocked branch pipe according to pressure difference, and an in-line automatic unblocking system.

Description

Technical field [0001] The invention belongs to the technical field of blast furnace ironmaking in the iron and steel industry, and is suitable for a blast furnace coal injection system. Background technique [0002] At present, the blast furnace coal injection mainly adopts the injection method of coal injection main pipe, coal powder distributor, and coal injection branch pipe. Coal injection branch pipes are small in diameter and have many bends. In addition, the pulverized coal contains impurities or the moisture in the pulverized coal exceeds the standard. Phenomena such as blockage of blast furnace coal injection branch pipes and poor coal injection often occur, which affect the normal production of the blast furnace coal injection system. . In the prior art, in order to monitor the working condition of the coal injection branch pipe, the methods disclosed in patent 96120460.5 and patent 99109125.6 are to judge whether the coal injection branch pipe is blocked by dete...

Claims

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Application Information

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IPC IPC(8): C21B7/24
Inventor 张福明
Owner SHOUGANG CORPORATION
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