Feedforward control simulation method and system of TRT blast furnace top pressure controlling and stamping processes

Abstract

The invention provides a feedforward control simulation method of TRT (Top Gas Pressure Recovery Turbine Unit) blast furnace top pressure controlling and stamping processes, comprising the following steps of: 1) establishing component simulation modules for various constituent parts of a TRT system, and editing and designing parameters and interfaces; 2) connecting the all component simulation modules through the interfaces of the component simulation modules, and adjusting the parameters so as to enable the system to be at a steady state; 3) analyzing the characteristics of the actual stamping process of the TRT system, and adding a stamping interference module and a feedforward control module, wherein the stamping interference module is used for simulating the influence of the stamping process on the blast furnace top pressure, while the feedforward control module is used for calculating gas flow according to the difference between pressures of a stamping valve before and after stamping and a flow coefficient during stamping; and then calculating the corresponding opening degree of a stationary guide blade according to a flow characteristic curve of the stationary guide blade, and controlling the opening degree of the stationary guide blade in advance in the stamping; and 4) setting a system simulation parameter and performing simulation operation. According to the method, adjustment is performed in a simulation system to determine a relatively rational control scheme, so that influence caused by direct online testing on the normal operation of a blast furnace is 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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