Control method and control device for capacity optimization of chemical process

Abstract

The invention provides a control method and a control device for capacity optimization of a chemical process. The control device comprises a high value selector, a comparator, a feedback controller and a low value selector, wherein inputs of the high value selector are all operating capacities for deciding capacity of the chemical process; an output of the high value selector is connected with thecomparator; another input of the comparator is a maximum valve position set value; a difference value obtained by comparison is connected with an input of the feedback controller; an output of the feedback controller is connected with one input of the low value selector; another input of the low value selector is connected with a load set value; an output of the low value selector is connected with a feeding set value of a main control raw material. According to the method, all the operating capacities for deciding the capacity of the chemical process are detected; a higher operating capacityis selected and is compared with the maximum valve position set value; the feeding amount of the main control raw material is adjusted according to positive and negative of a comparison difference value, so that the capacity is optimum.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a production capacity optimization control method and device suitable for chemical process. Background technique [0002] A chemical process is a chemical or physical process that involves the production of the chemical industry and other process industries. These industries start from basic raw materials such as oil, coal, natural gas, water, and air, and use chemical or physical methods to change the composition, properties, and state of substances, thereby producing a variety of high-value products. Typical basic processes of chemical products include: fluid transportation, heat exchange (heating and cooling), distillation, etc., all of which require equipment that meets the requirements of process production to complete. In practice, the equipment investment of a chemical production process is usually very large. How to improve the degree of equipment automation control and ...

AI Technical Summary

Problems solved by technology

[0005] The above technology solves the production capacity optimization control problem of some sections or a certain product production process, but since the chemical process is a comprehensive system, each process unit equipment interacts and restricts each other, and the optimization of production capacity needs to consider all the equipment in the entire process , so the realization of chemical process production capacity optimization control needs to be further improved

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