Control system and control method for coal gas mixed pressure regulating
A technology of pressure regulation and gas mixing, which is applied in the direction of control/regulation system, non-electric variable control, and simultaneous control of multiple variables to achieve the effect of meeting thermal demand response and avoiding incorrect response and adjustment
Active Publication Date: 2014-12-24
BAOSHAN IRON & STEEL CO LTD
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Problems solved by technology
[0013] The purpose of the present invention is to solve the above-mentioned problems existing in the existing mixed gas pressure control and regulation, thereby providing an improved control system and method for gas mixed pressure regulation
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[0048] The composition, steps and working principles of the control system and method for adjusting the gas mixing pressure of the present invention will be described in detail below according to the drawings and specific implementations.
[0049] Such as Figure 5 Shown is a schematic composition diagram of the control system for gas mixed pressure regulation of the present invention, the control system is in figure 2 Based on the improved decoupled control loop shown in the figure 2 Correspondingly, the same parts are marked with the same reference numerals. Specifically, with figure 2 Similar to the decoupling control loop in the control system of the present invention, the control system of the present invention includes a primary mixing main loop, a coke oven gas flow control secondary loop and a blast furnace gas flow control secondary loop, wherein the primary mixing primary loop includes a primary mixing gas pressure controller PICs, coke oven gas flow control sec...
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The invention discloses a control system and a control method for coal gas mixed pressure regulating. The control system comprises a feedforward calculating unit, a pressure controller output feedforward calculating unit, a feedforward coke oven gas calculating unit and a feedforward blast furnace gas calculating unit. The feedforward calculating unit is used for calculating a feedforward compensation value according to the mixed coal gas flow of each branch tube and the mixed coal gas flow of a main tube in a heating furnace and calculating the feedforward amount of coke oven gas according to the feedforward compensation value. The pressure controller output feedforward calculating unit is used for calculating the output value of a pressure controller with feedforward compensation according to the feedforward amount of the coke oven gas. The feedforward coke oven gas calculating unit is used for performing feedforward compensation on a coke oven gas decoupling calculating unit. The feedforward blast furnace gas calculating unit is used for performing feedforward compensation on measured flow of the coke oven gas. By means of the control system and the control method for coal gas mixed pressure regulating, tracking on coal gas flow and pressure after one-time mixing of the coke over gas flow and the blast furnace gas flow can be well achieved, so that thermal requirement response of a heating furnace can be met.
Description
technical field [0001] The invention relates to the pressurization control of mixed gas, more specifically, a control system and method for adjusting the pressure of mixed gas. Background technique [0002] In modern iron and steel enterprises, most of the heating equipment, such as heating furnaces, etc., rely on the combustion of mixed gas to provide heat energy, such as figure 1 As shown, it mainly includes coke oven gas COG, blast furnace gas BFG and converter gas LDG. Among them, three flow regulating valves SV1, SV2 and SV3 are used to adjust the flow of coke oven gas, blast furnace gas and converter gas respectively, and temperature detectors T1, T2 and T3 are used to detect the temperature and pressure in different pipelines respectively Detectors P1, P2, P3, P4, P5 and Ps are used to detect the pressure in different pipelines. Flow detectors FI1, FI2 and FI3 are used to detect the flow in each pipeline. [0003] continue to combine figure 1 , taking the above th...
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IPC IPC(8): G05D27/02
Inventor 吴建光唐卫东吴春晖
Owner BAOSHAN IRON & STEEL CO LTD