METHOD FOR AUTOMATIC CONTROL OF THE PROCESS OF ION-EXCHANGE SORPTION OF AMINO ACIDS FROM WASTE WATER IN CONTINUOUS MODE Russian patent published in 2020 - IPC B01J47/14 C02F1/42 

FIELD: control system; technological processes.

SUBSTANCE: invention relates to a method for automatic control of the process of ion-exchange sorption of amino acids from waste water in a continuous mode, involving control of concentrations of waste water ingredients, measurement of flow rate of liquid solutions and their level in reservoirs. Method is characterized by that first, an ion-exchange column is filled to a certain level with cation exchanger, and initial water is then fed into ion-exchange column, in which the acidity level is pre-measured and maintained at the required level, controlling its flow rate, which is controlled to the optimum filtration rate during sorption, and when a certain residual concentration of the target component in the form of an amino acid corresponding to the "breakthrough" point is reached, performing additional filling of ion-exchange column with cationite to maximum permissible level ensuring absence of content of target component in form of amino acid at outlet from column at solution output in solution, after which the sorption process is carried out until the residual concentration of the desired component in the used solution appears in the form of an amino acid corresponding to the "breakthrough" point, and at that moment part of cationite is transferred for regeneration into desorption chamber, and sorption chamber is additionally filled from separator with cationite subjected to regeneration to level, at which during sorption there is no target component in form of amino acid in spent solution, wherein the regenerated cationite from the sorption chamber is fed into the separator by air flows using an air blower from the cooler, wherein in the separator a permissible pressure drop is provided, and in refrigerator - required air speed, wherein regeneration is carried out in two stages, first, acidic waste water is forced from cationite by passing through it at a rational rate of preheated to required temperature distillate, in which at the outlet of the ion-exchange column the acidity is measured, by the level of which the completion of the displacement stage is determined, and then desorption is carried out by filtering through a layer of cationite pre-heated to a given temperature of the desorbing solution with control and adjustment of its flow rate to optimum rate of filtration during desorption, wherein after passage of solution through an ion-exchange column it is selected in form of an acidic concentrated eluate at a given acidity value and terminating the desorption step when acidity of the initial value is achieved, wherein information on the course of processes of ion-exchange sorption of amino acids from waste water and desorption of cationite is transmitted from sensors for controlling the process of ion-exchange sorption of amino acids from waste water through secondary devices into a microprocessor, which outputs correcting signals through digital-to-analogue converters to actuating mechanisms for changing parameters of equipment operation depending on selected rational parameters of process performance.

EFFECT: due to additional measurement of modes and changing parameters of operation of equipment depending on rational parameters of process, method increases accuracy of control and minimizes energy and material costs, and sorbent arrangement and additional charge sequential in sorption chamber and subsequent timely removal of its part from chamber provides its full use for extraction of target component.

1 cl, 1 dwg