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

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...

AI Technical Summary

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

Images