A control method, device and equipment for stabilizing liquid level
A technology for stabilizing liquid level and control method, which is applied in liquid level control, comprehensive factory control, control/regulation system, etc. It can solve problems such as high labor cost, low control precision, and unstable total liquid level, so as to improve accuracy and response speed, the effect of saving labor costs
Active Publication Date: 2022-07-12
SHENYANG CHEM IND CO LTD
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Problems solved by technology
This conventional method relies on manual independent adjustment of the feed volume of each raw material feed bin and the discharge volume of each reactor. The labor intensity of the operators is extremely high, and the total liquid level is often unstable and fluctuates greatly Affect product quality, not only requires high labor costs, but also low control accuracy
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[0092] like Figures 6 to 8 As shown, the multi-channel feeding equipment includes n raw material feeding bins, namely E-01, E-02...E-0n, and corresponding n reactors, respectively A-01, A-02...A -0n, and the total discharge air supply cabinet, and set the preset liquid level value SV to 65%, the preset liquid level floating value GW to 10%, and the preset change range GAP to 0.25 according to the working conditions. The control scheme is as follows:
[0093] First, obtain the actual total liquid level PV of the total discharge gas supply cabinet through the total liquid level measurement module LT, and input the actual total liquid level PV, the preset liquid level value SV, the preset liquid level floating value GW, and the preset variation range GAP. To the liquid level feedback control algorithm module LIC, calculate the feed volume CV of the raw material feed bin;
[0094] Among them, when 55%<=PV<=75%, the PID parameters in the liquid level feedback control algorithm m...
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The invention provides a control method, device and equipment for stabilizing the liquid level. The control method includes: obtaining the actual liquid level value PV of the total discharge cabinet; according to the actual liquid level value PV and the preset liquid level value of the total discharge cabinet SV and the preset liquid level floating value GW, calculate the feeding volume CV of the feeding bin; control the feeding of the feeding bin according to the feeding volume CV, and control the reactor corresponding to the feeding bin to discharge the material to the total discharge cabinet . In the control method for stabilizing the liquid level according to the embodiment of the present invention, the feeding bin is calculated according to the actual liquid level value PV of the total discharge cabinet, and the relationship between the preset liquid level value SV and the preset liquid level floating value GW The feed volume CV is controlled according to the feed volume CV, and the feeding of the feed bin and the discharge of the reactor to the total discharge cabinet are controlled according to the feed volume CV, thereby improving the accuracy and response speed of the stable control of the liquid level of the total discharge cabinet. Save labor costs.
Description
technical field [0001] The invention relates to the technical field of multi-channel feeding devices, in particular to a control method, device and equipment for stabilizing liquid level. Background technique [0002] In the petrochemical production process, after the raw materials are discharged from their independent silos and entered into their respective independent reaction units, the intermediate products produced by the reaction are aggregated and then used as the total feed to enter the next production unit. It is a relatively common working mode. Ensuring the stability of the total liquid level after the various reaction intermediates converge into the total discharge device is crucial for generating stable operation, reducing product quality fluctuations and operating safety of the device itself. [0003] figure 1 A schematic diagram of the conventional control scheme and operation flow of a chemical enterprise in the prior art is shown. The multi-channel feeding ...
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IPC IPC(8): G05D9/12
CPCG05D9/12Y02P90/02
Inventor 魏革冯恩波苏岳龙
Owner SHENYANG CHEM IND CO LTD