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Feedforward control simulation method for TRT blast furnace top pressure control material distribution process and system therefor

A technology of feed-forward control and simulation method, which is applied to blast furnaces, blast furnace details, furnaces, etc., can solve the problems of top pressure fluctuation maintenance, blast furnace normal influence, and no good control solution solution, and achieve the effect of convenient modeling

Inactive Publication Date: 2012-09-19
WISDRI ENG & RES INC LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the process of TRT controlling the top pressure of the blast furnace, under normal circumstances, only the conventional PID is required to stabilize the top pressure of the blast furnace, but the blast furnace will cause a strong disturbance to the top pressure of the blast furnace when the blast furnace is placed. The top pressure fluctuation cannot be maintained in a small range, which will inevitably have a certain impact on the normal production of the blast furnace, but there is currently no good control solution to solve the impact of the cloth distribution process on the top pressure, and due to the continuous production of the blast furnace If engineers test different control schemes online, it will definitely have a great impact on the normal operation of the blast furnace, and even cause various dangerous consequences

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  • Feedforward control simulation method for TRT blast furnace top pressure control material distribution process and system therefor
  • Feedforward control simulation method for TRT blast furnace top pressure control material distribution process and system therefor
  • Feedforward control simulation method for TRT blast furnace top pressure control material distribution process and system therefor

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Embodiment Construction

[0050] figure 2 It is the top pressure control model diagram of TRT blast furnace, that is, the topological structure of the entire TRT simplified model. Boundary A produces a stable gas flow, which enters the blast furnace through pipe A, and the gas flows out of the furnace top through the material layer in the blast furnace, and passes through a long pipe B flows into the vanes in the turbine and finally flows out to boundary B.

[0051]The material layer of the blast furnace is divided into upper and lower spaces, which can be equivalent to two airtight large containers, namely the upper container and the lower container, while the material layer can be equivalent to a valve, namely the first regulating valve. When the porosity of the material layer is increased, it is equivalent to the process of reducing the opening of the first valve. At this time, the gas volume entering the furnace top through the first valve decreases, causing the pressure on the furnace top to decr...

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Abstract

The invention provides a feedforward control simulation method for a TRT blast furnace top pressure control material distribution process and a system therefore. Blast furnace material distribution is a disturbance that can be known in advance, so that the opening degree of a stationary guide blade can be controlled in advance through the analysis of the material distribution process to eliminate the influence of material distribution on the blast furnace top pressure. During material distribution, the porosity of a material surface is reduced when a furnace material reaches the material surface, so that the air permeability of the material surface is decreased, and coal gas flow resistance is increased. Therefore, the flow of coal gas reaching the furnace top is reduced, and a plunge in the furnace top pressure occurs if the opening degree of the stationary guide blade is unchanged. Feedforward control includes the parallel steps of calculating the decrease in coal gas flow according to furnace material type, the timing, gear and interval of material distribution and the like and calculating the opening degree of the stationary guide blade corresponding to the decrease in coal gas according to the rating curve of the stationary guide blade. The curve is utilized to control the opening degree of the stationary guide blade in advance during material distribution, so that the influence of material distribution on the furnace top pressure can be eliminated.

Description

technical field [0001] The invention relates to the field of TRT blast furnace top pressure control in the metallurgical industry. Background technique [0002] TRT is the abbreviation of Top Gas Pressure Recovery Turbine unit, which is called a blast furnace gas residual pressure power generation device. It uses the high temperature and high pressure gas generated by the blast furnace to drive the turbine, and then drive the generator to generate electricity. According to statistics, TRT can recover 30%-40% of the energy in blast furnace gas. Compared with the traditional pressure reducing valve group of the blast furnace, it can better stabilize the top pressure of the blast furnace and greatly reduce the noise pollution caused by the pressure reducing valve group. TRT can not only bring huge economic benefits to iron and steel enterprises, but also a benchmark project for energy saving and emission reduction. A typical TRT process flow is attached figure 1 shown. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B5/00C21B5/06
Inventor 万磊李清忠叶理德
Owner WISDRI ENG & RES INC LTD
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