Methods to prevent the explosion of electrostatic precipitators

An electrostatic precipitator and explosion venting technology, which is applied in the manufacture of converters, etc., can solve the problems of electrostatic precipitator explosion venting, and achieve the effect of avoiding explosion venting and energy-saving operation

Active Publication Date: 2021-04-20
HEBEI IRON AND STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a method for preventing the explosion venting of the electrostatic precipitator, so as to solve the defect that the electric precipitator is prone to explosion venting in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Electrostatic precipitator position: Set the preset outlet temperature of the evaporative cooler to 260°C. In the first 16s before blowing, the water regulating valve of the evaporative cooler is controlled by a fixed opening, and the opening is controlled at 18%. The flow rate of the evaporative cooler 20Nm 3 / h, 16s after the start of blowing, the water distribution regulating valve of the evaporative cooler automatically adjusts the water distribution through the PID control system according to the actual outlet temperature and the preset outlet temperature of the evaporative cooler, and the P and I control parameters are set to 1.0 and 0.8 respectively.

[0029] Converter post: After blowing starts, the post observes the actual outlet temperature of EVC. After 38 seconds of blowing, the actual outlet temperature of EVC rises to 410 degrees. It is judged that the ignition is successful, and the blowing continues until the end.

Embodiment 2

[0031] Electrostatic precipitator position: Set the preset outlet temperature of the evaporative cooler to 290°C. In the first 16 seconds before blowing, the water regulating valve of the evaporative cooler is controlled by a fixed opening, and the opening is controlled at 16%. The flow rate of the evaporative cooler 16Nm 3 / h, 16s after the start of blowing, the water distribution regulating valve of the evaporative cooler automatically adjusts the water distribution through the PID control system according to the actual outlet temperature and the preset outlet temperature of the evaporative cooler, and the P and I control parameters are set to 1.0 and 0.8 respectively.

[0032] Converter post: After blowing starts, observe the EVC inlet temperature and actual outlet temperature, and find that the actual EVC outlet temperature rises too fast, and rise to 1000°C within 10s, then judge the EVC outlet temperature detection failure, immediately lift the gun to stop blowing, and no...

Embodiment 3

[0035] Electrostatic precipitator position: Set the preset outlet temperature of the evaporative cooler to 320°C. In the first 16s before blowing, the water regulating valve of the evaporative cooler is controlled by a fixed opening, and the opening is controlled at 15%. The flow rate of the evaporative cooler 15Nm 3 / h, 16s after the start of blowing, the water distribution regulating valve of the evaporative cooler automatically adjusts the water distribution through the PID control system according to the actual outlet temperature and the preset outlet temperature of the evaporative cooler, and the P and I control parameters are set to 1.0 and 0.8 respectively.

[0036] Converter post: After the blowing started, observe the actual outlet temperature of EVC, and found that within 60s, the actual EVC outlet temperature only rose slowly. After 60s of blowing, the actual EVC outlet temperature was only 210°C. It was judged that the ignition failed, and the gun was stopped immedi...

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PUM

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Abstract

The invention relates to a method for preventing explosion venting of an electrostatic precipitator, which controls the opening of the water distribution regulating valve of the evaporative cooler, and determines whether the actual outlet temperature of the evaporative cooler can rise to 400-450°C within 35-60 seconds after blowing starts. Judging whether the ignition is successful, if the ignition is successful, continue blowing, otherwise stop blowing immediately and blow in nitrogen before the oxygen lance reaches the waiting position, and remove the O in the flue gas. 2 Dilute to less than 6% by volume. This method can effectively avoid O 2 The excess will cause the explosion venting of the electrostatic precipitator.

Description

technical field [0001] The invention relates to a steelmaking dust removal technology, in particular to a method for preventing explosion venting of an electric dust collector. Background technique [0002] With the development of converter steelmaking technology, the steelmaking process is becoming more and more perfect, and the corresponding dust removal technology is also constantly developing and improving. Currently, O 2 There are two main methods of flue gas purification and recovery in top-blown converter steelmaking, one is the flue gas wet purification recovery system, and the other is the flue gas dry purification recovery system. [0003] The converter flue gas dry purification and recovery system is mainly composed of evaporative cooler, electrostatic precipitator, fan, gas cooler, switching station, and diffuser tower. The dust removal effect is obviously better than the traditional wet dust removal. Compared with wet dust removal, dry dust removal has the fol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C5/38C21C5/30
CPCC21C5/30C21C5/38
Inventor 李艳东邢建军韩锋李涛刘畅王金星刘德健
Owner HEBEI IRON AND STEEL
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