Intelligent control method and system for delayed coking device
A technology of intelligent control and delayed coking, which is applied in general control system, control/regulation system, adaptive control, etc., can solve problems such as single processing, inability to automatically control delayed coking, and inability to achieve intelligent effective suppression
Active Publication Date: 2011-05-25
TSINGHUA UNIV
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Problems solved by technology
[0005] The technical problem to be solved by the present invention is how to solve the technical problems that the automatic control of coking cannot be delayed, the processing of switching interference is single, the effective suppression of intelligence cannot be realized, and the technical problems that cannot be optimally controlled during the switching process
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[0116] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0117] On the basis of in-depth understanding of the delayed coking process device and operation process, the present invention extracts the impact of the operation of each stage of the delayed coking device on the entire production process by analyzing the actual data on site, and summarizes and summarizes the actual experience of the field operation engineer, and finally Established an expert system for the influence of operation events such as preheating, tower cutting, and small steam blowing on the bottom temperature and liquid level of the main fractionator, and then used the idea of feedforward control to realize the suppression of switching disturbances, and aimed...
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The invention discloses an intelligent control method for a delayed coking device, which comprises the following steps: S1) setting operating variables of intelligent control of the delayed coking device, an initial value of state marker bit, and thresholds of place value of a feed valve and relative quantity of blowing steam, wherein the relative quantity of the blowing steam is the ratio of the flow rate of the blowing steam to the total feeding flow rate of a heating furnace; S2) acquiring the current place value of the feed valve and the current relative quantity of the blowing steam through a distributed control system, and judging the process step which needs to be performed according to the current place value of the feed valve and the current relative quantity of the blowing steam; and S3) adjusting the operating variables and the state marker bit correspondingly according to the process step, and returning to the step S2) after completing the adjustment. With the adoption of the method, the intelligent compensation control of the delayed coking device can be realized, and the technical problems of single processing of switching disturbance, incapability of realizing intelligentized effective suppression and incapability of performing optimal control during the switching process can be solved.
Description
technical field [0001] The invention relates to the field of petrochemical technology, in particular to an intelligent control method and system for a delayed coking device. Background technique [0002] The delayed coking process is a kind of strongly coupled, nonlinear, time-varying, large-delay and multi-constraint process. As countries all over the world and my country have seen the trend that the proportion of heavy crude oil in crude oil extraction is increasing, and at the same time, due to the continuous changes in the consumption structure of petroleum products, the demand for heavy fuel oil is increasingly reduced, and light oil (especially The demand for diesel oil is increasing rapidly, and the demand for high-quality petroleum coke used in the manufacture of metallurgical electrodes, especially ultra-high-power electrodes, is increasing. The delayed coking process is now attracting more and more attention. Due to the simplicity of the delayed coking process, str...
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Inventor 黄德先于晓栋张伟勇吕文祥施大鹏魏宇杰
Owner TSINGHUA UNIV