Method for controlling flow of non-standard container by using liquid level instrument
A non-standard liquid level meter technology, which is applied in the flow control of electric devices, etc., can solve problems such as easy scaling of liquids, failure of flowmeter measurement, and data inconsistency, and achieve the effects of low price, appropriate accuracy, and high reliability
Pending Publication Date: 2022-08-09
SHANXI TAIGANG STAINLESS STEEL CO LTD
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Problems solved by technology
Usually, install a flowmeter on the pipeline, and then use the flowmeter to measure the exact flow; however, due to the fact that some liquids in the production process are prone to fouling, the flowmeter measurement fails, or due to the production environment, the length of the pipeline, etc. Due to restrictions, unreasonable design and other reasons, after installing flowmeters on some pipelines, the measured data does not match the actual situation.
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[0021] In industrial production, due to various reasons, when the scale of the flowmeter used in non-standard vessels fails, accurate and reliable data cannot be provided for production. The blast furnace produces gas during the smelting process. Since the gas contains high chlorides and other acidic substances, when the gas temperature drops to the dew point, condensed water will be discharged, which will cause corrosion of equipment and pipelines. Therefore, it is necessary to spray lye on the blast furnace gas. Neutralize chlorides and acidic components in gas, and increase the PH value of blast furnace gas condensate to above 7. According to the characteristics of the non-standard container, the invention establishes a mathematical model, measures the liquid level weight of the non-standard container, and then calculates the flow rate of the non-standard container through the difference of the solution weight at different times, so as to realize fast and accurate control of...
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The invention relates to the field of industrial control, in particular to a method for controlling the flow of a non-standard container through a liquid level instrument. A method for controlling the flow of a non-standard container through a liquid level instrument comprises the following steps that firstly, modeling is simplified for the non-standard container, and the non-standard container is converted into a computable space model; 2, establishing a mathematical model for calculating the volume of the non-standard container; 3, establishing a mathematical model for flow calculation; 4, converting the mathematical model into a linear model; and 5, inputting the linear model of the liquid level and the liquid weight into a control system: after the linear model of the liquid level and the flow velocity is established, taking a liquid level value as an input value, taking the flow velocity calculated by the linear model as an output value, and performing real-time flow control through a PLC (Programmable Logic Controller). The method has the advantages of appropriate precision, low price, high reliability and the like.
Description
technical field [0001] The invention relates to the field of industrial control, in particular to a method for controlling the flow rate of a non-standard container by using a liquid level meter. Background technique [0002] In industrial production, especially the steel industry, there are many non-standard containers that need to accurately measure the flow of their use. Usually, a flowmeter is installed on the pipeline, and then the flowmeter can be used to measure the exact flow; however, some liquids in the production process are prone to scaling, resulting in the failure of the flowmeter measurement, or due to the production environment, pipeline length Due to restrictions, unreasonable design and other reasons, after the flowmeter is installed on some pipelines, the measured data does not match the actual. In this case, it is necessary to adopt a new method for flow measurement to meet production needs. The present invention has been developed under such circumstan...
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CPCG05D7/0617
Inventor 李壮年李宝峰赵新民张亮民李晓明佟明宏张立勋白励勤张健美
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD