Blockage prevention and removal control device and method based on differential type large blast furnace injection system

A control device and control method technology, applied in blast furnaces, inspection devices, blast furnace details, etc., can solve problems such as low sampling frequency, poor acquisition accuracy, and slow response speed

Active Publication Date: 2021-07-13
NANJING INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, due to the continuous passage of fuel in the blast furnace injection pipe, certain blockage will inevitably occur after a long period of use
In the existing injection system, there are poor collection accuracy, low sampling frequ

Method used

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  • Blockage prevention and removal control device and method based on differential type large blast furnace injection system
  • Blockage prevention and removal control device and method based on differential type large blast furnace injection system
  • Blockage prevention and removal control device and method based on differential type large blast furnace injection system

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Embodiment Construction

[0033] Embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0034] Such as figure 1 As shown, the anti-blockage and blockage removal control device based on the differential large-scale blast furnace injection system in this embodiment includes a coal delivery pipeline and an injection system, wherein: the discharge port of the coal delivery pipeline is equipped with a discharge port pressure sensor, and Install the pressure sensor at the discharge port, the pressure sensor at the discharge port is used to detect the air pressure signal at the discharge port of the coal transportation pipeline, the pressure sensor at the discharge port is used to detect the air pressure signal at the discharge port of the coal transportation pipeline, and the injection system can flow down the coal transportation pipeline Gas is injected at the material port, and the injected gas is a steady-state sine waveform injectio...

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Abstract

The invention discloses a blockage prevention and removal control device and method based on a differential type large blast furnace injection system. According to the method, in the normal working process of the system, when pulverized coal accumulation or pulverized coal adhesion occurs in a coal conveying pipeline, friction rise exists in the coal conveying pipeline, so that phase deviation occurs to waveforms acquired by a pressure sensor at a discharge port, and meanwhile, the sine wave amplitude of the discharge port is reduced; the control device analyzes and calculates the acquired pressure data curves of a feed opening and the discharge port, calculates real parts, imaginary parts and effective values of the two curves in a phasor mode, and calculates a phase angle between the two curves according to the phasor; and when the obtained effective value and the phase angle both exceed preset threshold values, it is judged that the pipeline is blocked, and the control device controls the injection system to conduct blockage removal action. The device and the method have the characteristics of high reliability, high acquisition precision, high sampling speed, high action sensitivity, capability of pre-judging the coal conveying pipeline in advance, short blockage removal action time and the like.

Description

technical field [0001] The invention relates to the technical field of metallurgy and environmental protection, in particular to a control device and method for blocking and removing blockages based on a differential-type large-scale blast furnace injection system. Background technique [0002] Fuel injection into blast furnace is a blast furnace intensified smelting technology that injects gas, liquid or solid fuel into the blast furnace from the tuyere through special equipment to replace part of the coke in the blast furnace charge. [0003] It improves blast furnace operation, increases pig iron production, and reduces pig iron costs. Blast furnace continuous steel casting uses metallurgical coke as fuel and reducing agent, and the injected fuel is converted into CO and H at high temperature in the tuyere area 2 , can replace part of the coke burned in the tuyere, generally 20% to 30%, and up to 50%. Fuel injection has become the main measure to reduce the coke ratio o...

Claims

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Application Information

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IPC IPC(8): C21B5/00C21B7/24
CPCC21B5/003C21B5/006C21B7/24
Inventor 杨小兰刘极峰崔润洪磊叶文旭
Owner NANJING INST OF TECH
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