SU456067A1 - The method of automatic control of the composition of paper and paperboard - Google Patents

Description

a composer, a secondary device 24 of an induction flow meter, a multiplier 25, a totalizer 26, a regulating device 27 with a manual control setpoint 28, an actuator 29 and a regulating valve 30.

The correction device according to the level of the compositional mass in the tank of the composition has a sensor 31 in the form of a sampling device and a secondary device 32 in the form of a diffractometer.

The correction device for the absolutely dry mass flow rate at the output of the composition contains sensors 33 and 34, the secondary setting 35 of the concentration of the composite mass at the output makes up the composition, the secondary device 36 the flow rate of the composite mass at the output is composition and the multiplier 37.

The object of regulation - tank 38 constituted the composition.

The signals from sensors 1, 3 and 2, 4 are fed to the input of multiplier 5. From the output of multiplying device, the signal goes to the input of summing device 6 simultaneously with the signal from device 37. The signal from the output of summing device 6 goes to input of regulating device 7 simultaneously with a signal from the setpoint adjuster 8 and a signal from the device 32. The signal from the output of the regulating device 7 is fed to the actuator 9, which controls the movement of the movable rod of the control valve 10.

The signals from the sensor devices 11, 13 and 12, 14 are fed to the input of the multiplier 15. From the output of the multiplying device, the signal enters the input of the summing device 16 simultaneously with the signal from the device 37. The signal from the output of the summing device 16 is fed to the input of the regulating device 17 simultaneously with the signal from the manual control setpoint 18 and the signal from the device 32. The output from the regulator and the rim 17 is fed to the actuator 19, which controls the movement of the moving brush of the regulating valve 20.

The signals from the sensor devices 21, 23 and 22,

24 receives the input of the multiplier device 25. From the output of the multiplying device, the signal is fed to the input of the summing device 26 simultaneously with the signal from instrument 37. The signal from the output of the summing device 26 is fed to the input of the regulating device 27 simultaneously with the signal from the control unit 28 and control 32. The signal from the output of the regulating device 27 is fed to the actuator 29, which controls the movement of the rolling rod of the regulating valve 30.

As the sum signal at the input of the regulating device increases, the signal at its output increases. As a result, the opening of the corresponding control valve is reduced, which leads to a decrease in the supply of component mass to the compiler.

Pulses inputted at current values of the concentration of input component masses and current values of consumption and concentration of the composite mass at the output of the composition make up the composition, increase the accuracy of information about the quality of the process of adjusting the composition of the mass continuously in time and the formation of control actions.

Due to this, the duration and maximum dynamic error of transient regimes is reduced, which improves the quality of the mass composition adjustment process.

Prevention Invention

The method of automatic control of the composition of paper and cardboard mass, based on the supply to the flow controllers of the component masses of pulses according to the consumption of the respective component masses and

impulse according to the level of the composite mass in the tank made up the composition, about tl and h and the fact that, in order to improve the quality of regulation, the impulses of

the current values of the concentrations of the corresponding input component masses and pulses at the current values of the flow rate and concentration of the composite mass at the output of the composition of the composition.

tr is pichna waste paper- wood mass but mass

konpozuuuo fna mass