Feedforward feedback simulation method for TRT (Top Gas Pressure Recovery Turbine unit) blast furnace top pressure control stamping process and system therefor

Abstract

The invention provides a feedforward feedback simulation method for a TRT blast furnace top pressure control stamping process. Through establishing a feedforward feedback simulation system and utilizing a simulation method for the blast furnace stamping process, the rating curve of a stationary guide blade is utilized in advance for feedforward control of the opening degree of the stationary guide blade during stamping, the set value of the top pressure and the feedback value are compared, a controlled variable is output for feedback control of the stationary guide blade, and commissioning in the simulation system can ensure a more reasonable control scheme, so that the influence of direct online testing of different control schemes on the normal operation of the blast furnace can be avoided.

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...

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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 during stamping. 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 stamping 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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