SU794019A1 - System for automatic control of viscous solution maturing process - Google Patents

Description

precision apparatus, the output of the first dividing unit is connected to the first input of the viscose ripening rate determining unit; maturity, is additionally equipped with a difference determination unit, phase-sensitive inverse amplifiers and an algebraic adder, and the output of the determination unit Viscose ripening speed and the output of a given viscose ripening rate determining unit are connected in series through a difference determining unit, a phase-sensitive inverse amplifier and the first input of the algebraic adder to the adder input, the second input of the algebraic adder is connected to the output of the secondary device of the temperature sensor, the output of the first maturity index determining unit is connected to the second inputs of a viscose ripening rate determination unit and a given viscose ripening rate determination unit, and the output of the second unit for determining the maturity index is connected to the third input of the unit for determining the viscose ripening rate.

The drawing shows a block diagram of a system for automatically controlling the maturation process of a viscose solution.

The process of ripening viscose is carried out in a chain of apparatuses consisting of a heat exchanger 1, filtering units 2, 3 and intermediate apparatuses 4, 5.

The level of viscose in the filtering units 2, 3 and intermediate devices 4, 5 is measured by the corresponding sensors 6, 7, 8, 9 levels. The temperature after the heat exchanger 1 is measured by the temperature sensor 10 with the secondary device 11 and regulated through the adder 12 and the regulator 13 and the actuator 14 and the regulator 15. The signals from the sensors 6, 7, 8, 9 come to the corresponding blocks 16, 17, 18, 19 viscose volume determination. The first block 20 of the summation of the signals from blocks 16 and 17 carries out the determination of the total volume of viscose from the exit of the heat exchanger 1 to, for example, the intermediate apparatus 4.

The signal from the viscose flow sensor 21 after the filtering units 2 and 3, using the secondary device 22, determines the viscose consumption, the received signal is fed to the input of the first division unit 23. In the first division unit 23, the signal from the summation unit 20 is divided by the signal from the secondary device 22 , thereby determining the residence time of the viscose in the heat exchanger 1 and filter units 2 and 3.

The signals from the first division unit 23 and sensor 24 of viscose maturity index after heat exchanger 1 through first unit 25 for determining maturity index and sensor 26 for viscose index after filtering ycfaiHoBKk for 3 hours; through the second unit 27, a definite index of maturity are fed to unit 28 for determining speed ripening viscose.

The signals from blocks 16, 17, 18 and 19 for determining the volume of viscose go to the second block 29 of summation, where the total volume of viscose is determined in all devices. The second dividing unit 30 receives signals from the second summation unit 29 and from the viscose flow sensor 31 and after the intermediate device 5 via the secondary device 32. The block 30 determines the residence time of the viscose in all devices by dividing the signal from the second summation unit 29 from the secondary device 32.

The signals from the first viscose maturity index determining unit 25, the second dividing unit 30 and setting unit 33 are fed to the viscose ripening rate determining unit 34. The signals from the outputs of the viscose ripening rate determination unit 28 and the viscose ripening rate determination unit 34 are fed to the difference determination unit 35, where it is determined

the difference between the indicated values. Next, the signal from block 35 through the photosensitive inverse amplifier 36 is fed to the first input of the algebraic adder 37, the second input of the mentioned algebraic adder receives a signal from the secondary device I. spinning, from a given value, the value of a given viscose ripening rate, determined by block 34, changes.

any of the disturbing effects: the residence time of the viscose in the viscose compartment, which varies depending on the consumption and throughput of the process apparatus, as well as the initial

index of maturity - depending on the characteristics of the original pulp and the conditions of the existing process. If the value of a given viscose ripening rate is greater than the actual, i.e., the difference between the specified and actual viscose ripening rate determined by block 35 is positive, then the inverse phase-sensitive amplifier 36 forms a signal proportional to this difference, which in block 37 is subtracted from the value corresponding to the current temperature viscose at the exit of the heat exchanger 1. At the same time, the control action of the controller 13 is formed at the input of the adder 12.

The use of the described system in the production of artificial fibers allows:

- more efficiently manage the temperature and time maturation process of viscose solutions;

- to increase the degree of maintenance of the output technological indicator - viscose maturity index.

In turn, an increase in the degree of maintenance of this parameter will allow to reduce fiber loss, reduce downtime in downstream areas, reduce the proportion of fiber production of spore quality, as well as the share of realized waste and scrap.

Claims (1)

1. USSR author's certificate number 573800, cl. C 05D 27/00, 1977. Viscose tO 2 Heat / to-15 axle / pel / 21