Method and system for simulating feedforward and feedback in heat treated (TRT) blast furnace top pressure cloth control process

Abstract

The invention provides a method for simulating feedforward and feedback in heat treated (TRT) blast furnace top pressure cloth control process. The method comprises the steps: (1) respectively establishing part simulating modules for constituent parts of a TRT system and compiling and designing parameters and interfaces for the part simulating modules; (2) connecting the part simulating modules according to the actual TRT system through the interfaces of the part simulating modules and adjusting the parameters of the part simulating modules to enable the system to be stable; (3) analyzing characteristics of the cloth process of the actual TRT system and the control method and increasing a cloth interference module, a process identification (PID) feedback control module and a feedforward control module, wherein the cloth interference module is used for simulating the influence of the cloth process to blast furnace top pressure, the PID feedback control module is used for comparing a top pressure set value and a feedback value and outputting controlling quantity so as to control stationary blades, and the feedforward control module is used for utilizing a flow characteristic curve of the stationary blades in advance in the cloth process to control the opening degree of the stationary blades; and (4) setting simulating parameters of the system and performing simulated operation.

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 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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