Intelligent setting system and method for aluminum oxide evaporation process
An alumina, intelligent technology, applied in chemical instruments and methods, alkali metal aluminate/alumina/aluminum hydroxide preparation, inorganic chemistry, etc. Evaporation process judgment and other issues
Active Publication Date: 2020-03-31
NORTHEASTERN UNIV
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Problems solved by technology
[0003] At present, the output concentration of the alumina evaporation process relies on manual control. Due to the complexity of the evaporation process, the concentration adjustment has a lag, and it is difficult for the operator to make timely and accurate judgments on the evaporation process, and it is difficult to make timely adjustments to the evaporator feed. Timely and accurate adjustments are made, so that the output concentration is in a state of too high or too low concentration most of the time, resulting in waste of energy, low evaporator efficiency, and a decline in the pass rate of the output concentration.
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[0098] 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.
[0099] Such as figure 1 As shown, the structure of an intelligent setting system for an alumina evaporation process in this embodiment is as follows, including: a bottom evaporation circuit, a data processing and display layer, and an operation layer;
[0100] The underlying evaporation circuit provides basic data for the intelligent setting layer, and the basic data includes: circuit data, process operation data and assay data;
[0101] The bottom evaporation loop includes: feed pipe, discharge pipe, falling film evaporator, flash evaporator, blending tank, temperature sensor, flow sensor, concentration meter, electric regulating valve, and basic control loop;
[0102] ...
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The invention discloses an intelligent setting system and method for an aluminum oxide evaporation process, belonging to the technical field of industrial automatic control. The system monitors feeding and discharging concentrations, flow and feeding temperature in the evaporation process in real time. The value of feed flow is fed back and adjusted by adopting a rule-based reasoning method according to the discharging concentration; feedforward adjustment on the value of the feed flow is performed by adopting the rule-based reasoning method according to the boundary condition changes of the feeding temperature and the feeding concentration; and the feed flow is adjusted by controlling an electric control valve through a basic control loop, so the intelligent setting control of the aluminum oxide evaporation system is realized. Compared with the mode of adjusting the feed flow through manual experience-based operation, the intelligent setting system and the intelligent setting method of the invention have the advantages that the workload of operators is reduced, the subjectivity and randomness of experience-based production are avoided, and product quality and other production indexes are effectively and reliably guaranteed.
Description
technical field [0001] The invention relates to the technical field of industrial automation control, in particular to an intelligent setting system and method for an alumina evaporation process. Background technique [0002] In the process of producing alumina by the Bayer method, the main purpose of the alumina evaporation process is to remove excess water in the production process by heating and evaporating the mother liquor, increase the concentration of the mother liquor, and make the evaporated mother liquor meet the subsequent lye preparation process The requirements for preparing qualified circulating lye, thereby ensuring the normal progress of the Bayer process alumina production cycle. [0003] At present, the output concentration of the alumina evaporation process relies on manual control. Due to the complexity of the evaporation process, the concentration adjustment has a lag, and it is difficult for the operator to make timely and accurate judgments on the evap...
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Login to View More IPC IPC(8): C01F7/06
CPCC01F7/0666
Inventor 王良勇李战辉柴天佑贾瑶唐光振
Owner NORTHEASTERN UNIV