Control method of draught fan for dry dust removal of converter gas

A technology of dry dust removal and converter gas, applied in the manufacture of converters, etc., can solve the problems of overshoot and response time, large fluctuations of converter flue gas, parasitic tremors, etc., to ensure recovery, good effect, high The effect of dynamic response

Inactive Publication Date: 2013-01-23
丰镇新枫冶金有限公司
View PDF3 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the fluctuation of the flue gas of the converter is large, and the flue gas volume and flue gas composition change with the change of the smelting cycle. Control is difficult to obtain ideal control effect
In recent years, domestic scholars have proposed nonlinear compensation strategies such as sliding mode control, nonlinear PID control, and fuzz

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Control method of draught fan for dry dust removal of converter gas
  • Control method of draught fan for dry dust removal of converter gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] figure 1 It is a schematic structural diagram of the control system according to an embodiment of the present invention. The solid line in the figure indicates the transmission direction of the flue gas. The flue gas enters the dust collector through the vaporization cooling flue 6 from the furnace mouth of the converter 1 and is released from the dust collector. Fan 5 goes to let off the chimney. On the basis of the original system, a differential pressure measurement device 2 is installed at the furnace mouth hood of the converter to detect the process value of the differential pressure at the converter furnace mouth; a flue gas flow measurement device 3 is installed at the outlet of the dust collector to detect the flue gas The flow process value; the dotted line in the figure represents the logical relationship of control, the process value collected by the differential pressure measuring device 2 and the flue gas flow measuring device 3 is processed by the controll...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a control method of a draught fan for dry dust removal of converter gas, which comprises the following steps: in a phase other than converter oxygen blowing, transmitting a rotation speed percentage set value to a draught fan frequency changer in a fume flow control mode; in a converter oxygen blowing phase, setting an oxygen blowing start time; and when the oxygen blowing time exceeds the oxygen blowing start time, using a pressure PID (proportional-integral-derivative) controller and a fume flow PID controller in a cascade control mode combining fume flow control and converter mouth fume hood micro-differential pressure control, wherein the output quantity of the pressure PID controller is used for compensating for the set value of the fume flow PID controller, and the output value of the fume flow PID controller is used for controlling the rotation speed of the draught fan frequency changer. The method enables the draught fan to be in a good working state, ensures the recovery quantity of converter gas and ensures that the draught fan for dry dust removal of converter gas has high dynamic response, high tracking accuracy and favorable stability.

Description

technical field [0001] The invention relates to the field of electrical control in the iron and steel metallurgy industry, in particular to a method for controlling an induced draft fan for converter gas dry dust removal. Background technique [0002] The induced draft fan of the converter gas dry dedusting system is an important equipment of the converter gas recovery system. It is an important facility to turn a large amount of carbon monoxide flue gas produced in the converter smelting process into treasure. The induced draft fan sends the converter gas generated during oxygen blowing to the converter gas holder to ensure the working environment for steelmaking in front of the furnace. The induced draft fan is equipped with frequency conversion speed regulation, which is not only beneficial to the explosion venting of the system, but also can realize flow tracking and adjustment, so as to ensure the quantity and quality of gas recovery and save energy. [0003] The exist...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C21C5/40C21C5/30
Inventor 周晟
Owner 丰镇新枫冶金有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap