Feedforward control method of furnace top pressure of blast furnace

A feedforward control, blast furnace technology, applied in blast furnaces, blast furnace details, furnaces, etc., can solve the problem of low precision of large-lag control objects, and achieve the effect of overcoming slow response speed, forward running and increasing output, and improving control accuracy.
CN102559964AInactive Publication Date: 2012-07-11WISDRI ENG & RES INC LTD
3 Cites 8 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
WISDRI ENG & RES INC LTD
Publication Date
2012-07-11
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention relates to a feedforward control method of furnace top pressure of a blast furnace, comprising the following steps: furnace top distribution and pressure equalizing of a material distributing tank are considered to be main disturbance factors affecting the stability of the furnace top pressure during normal production of the blast furnace through analysis of a blast furnace technical process, a feedforward control mathematical model for furnace top distribution and top pressure and a feedforward control mathematical model for pressure equalizing and top pressure of the material distributing tank are established through analysis of internal relations of relevant parameters, the corresponding static blade angle control value is computed by the models as feedforward amount, and the top pressure is controlled by a PID (Proportion Integration Differentiation) and the feedforward mathematical models; the top pressure feedforward control is performed after beginning of furnace top distribution and pressure equalizing of the material distributing tank, before the top pressure is changed, the feedforward amount acts on a TRT (top gas pressure recovery turbine) static blade in advance, so that the disturbance of the top pressure is eliminated during emergence, and top pressure fluctuation caused by disturbance is reduced. In the invention, the disturbance of the top pressure can be eliminated during emergence, so that the control precision of the top pressure of the blast furnace can be effectively improved and the smooth operation and output of the blast furnace can be facilitated to be improved.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the field of furnace top pressure control for blast furnace ironmaking, in particular to a feedforward control method for blast furnace top pressure. Background technique

[0002] Among the control parameters of blast furnace ironmaking, furnace top pressure is one of the very important parameters. The control accuracy of furnace top pressure directly affects the smooth production and output of blast furnace. At present, the top pressure control methods at home and abroad mostly adopt the independent PID closed-loop control technology, because there are many disturbance factors of the top pressure, and the TRT top pressure control is a large lag control system, so the control accuracy can only be controlled at 4kPa or even above 5kPa. The forward movement and production of the blast furnace had a great impact. Contents of the invention

[0003] The technical problem to be solved by the present invention is to provide a feed-...

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