SU1520497A1 - Apparatus for controlling polymerization process - Google Patents

Abstract

The invention relates to devices for controlling the polymerization processes of disk monometers by stabilizing operating parameters (temperature, viscosity) and can be used in the production of synthetic rubber. The purpose of the invention is to improve the quality of regulation of the polymerization process parameters. The device consists of a series of functional blocks that form the two components of the control action: first prediction and compensation of the effect of uncontrolled disturbances

second stabilization of the controlled parameter of the polymerization process. In the control, a dynamic model of the polymerization process is used, which makes it possible to reduce the adjustment time and improve its quality. The proposed device improves the accuracy of stabilization of operating parameters, reduces the consumption rates for the original products. 1 il.

Description

This invention relates to the automation of polymerization processes and can be used in the manufacture of synthetic rubbers.

The purpose of the invention is to improve the quality of regulation of the operating parameters of the polymerization process.

The drawing shows the functional diagram of the device.

The device includes a polymer temperature (viscosity) sensor 1, a multiplication unit 2, a constant setting unit 3, a summation unit 4, a multiplication unit 5, a catalyst consumption sensor 6, a constant value setting device 7, an integration unit 8, an integration unit 9, a unit 10 sn knives

 11 constant value, summation unit 12, multiplication unit 13, constant value setting unit 14, summation unit 15, multiplication unit 16, fixed value sensor 17, summation unit 18, multiplication unit 19, summation unit 20, setpoint generator 21 constant value, multiplication unit 22, constant value setting device 23, exponential function calculation unit 24, multiplication unit 25, constant value setting device 26, timer 27, proportional-integral controller 28 and control valve 29 on the catalyst flow line.

The device works as follows.

SP

to

about

four

WITH

Values of temperature (viscosity) of reaction, catalyst consumption and values of constant values of K, and K from setters 3 and 7, K and K from sets of 11 and 14 enter blocks 2, 5, 10 and 13 multiplication and blocks 4 and 12 summations in which the right parts of the system equations are formed

(one)

S, S, S + k, t +,: S S. + S, + KjT + K4G.

In blocks 8 and 9, the derivatives of the variables S and S, | of which S are used, are used to calculate the first component of the control action on the consumption of the catalyst by the expression

GK S, - KjT.

(2)

The difference of the right side of equation (2) is calculated in block 15, the product KjT is in blocks 16 and 17, the second component of the catalyst consumption control is formed by the expression

To

K. (1

 to h

(3)

which is calculated in the following blocks: the value of the exponent is set by 26, blocks 25 and 24, its DZ multiplied by KT is in block 22, the expression in brackets is in block 20, the first part of expression (3) is calculated in block 19 and fed to block 18 summation, from the output of which the specified value; 5 catalyst consumption comes as a task to the catalyst consumption controller 2C, the second input of which receives the current catalyst consumption, the regulator acts on the control valve, changing the flow rate. catalyst.

When the reaction temperature decreases (increases) due to disturbances, the output signal of block 15 increases (decreases), the output signal of block 18 increases (decreases), and the task of catalyst consumption by regulator increases (decreases). When jg decreases (increase) the reference according to the reaction temperature, while decreasing (increasing) the output signal of block 21, the output signals of blocks 18 and 19 decrease (increase) 55 decreasing (increasing) the reference to the controller 28,

Automatic control device reduces dynamic deviations.

0

five

0

five

About 5 0

45 g 5

time, transient time by improving control dynamics, calculating more accurate catalyst dosing.

Claims (1)

Invention Formula A device for polymerization process fielding, containing polymer sensor and polymer devices, a series-connected sensor and a catalyst flow controller connected to the input to the control valve inlet on the catalyst supply line, as well as constant-value adjusters and blocks of slgmirovanie, characterized in that control quality, the device contains integration blocks, multiplication blocks, an exponential function calculation block, and a timer, the output of the temperature sensor jfHMepa is connected to the first input the first multiplication unit, the second input of which is connected to the output of the first constant value setpoint device, the first input of the second multiplication unit is connected to the output of the catalyst consumption sensor, and the second input is connected to the output of the second, constant value setter, the outputs of the first and second multiplication units are connected to corresponding- The inputs to the first summation unit, the third input of which is connected to the output of the first integration unit, the fourth input to the output of the second 1th integrated unit, and 5 and the output to the input of the first integration unit, the output of the polymer temperature sensor is connected the first input of the third i multiplication unit, the second input of which is connected to the output of the third unit, of a constant value, and the output to the first input of the second summation unit, the second input of which is connected to the output of the first integration unit 5, the third input to the output of the second b integration, the fourth input — with the output of the fourth multiplication unit, and the output — with the input of the second integration unit, the first input of the fourth multiplication unit is connected to the output of the catalyst consumption sensor, and the second input to the output of the fourth constant setting unit, the output of the first integrator is connected with the first input of the third summation unit, the second input of which is connected With the output of the fifth multiplication unit connected by the first input to the output of the fifth setpoint adjuster, and the second input to the output of the polymer temperature sensor and to the first input of the sixth multiplication unit, the output of the third summation unit is connected to the first input of the fourth summation unit, the second input which is connected with the output of the sixth multiplication unit, connected by the second input to the output of the seventh summation unit, the first input of which is connected to the output of the sixth setpoint generator of a constant value, and 0 04976 the second input is with the output of the seventh multiplication unit, the first input of which is associated with the output of the seventh constant value setter, and the second input with the output of the evaluation unit of the exponential function, the timer output is connected to the first input of the eighth multiplication unit, the second input of which is connected to the eighth output setting the constant value, and the output - with the input of the calculator of the exponential function; the output of the fourth summation unit is connected to the second input of the catalyst consumption regulator. Catalysis time mr Polymer