SU1602870A2 - Method of automatic control of process of sugar extraction from beet chips in diffusion apparatus - Google Patents

Abstract

The invention relates to the automation of sugar beet production, in particular to the automatic control of the process of extraction of sugar from beet chips in a diffusion apparatus. The aim of the invention is to reduce the variability of sugar losses in the pulp. The ratio of the solid and liquid phases of the juice-chip mixture in the apparatus is regulated step by step with a frequency of 0.0008-0.0167 with ^-3 and an amplitude proportional to the value of the actual consumption of beet chips, the deviation from the specified value of the actual sugar losses in the pulp in the pulp and the calculated value of the ratio of the fluxes of the leading liquid component and the beet chips in the previous adjustment step, the amplitude is adjusted depending on the difference between deviation from the desired value of the actual loss of sugar in the pulp in the current and the preceding control step. 1 il.

Description

The invention relates to the automation of sugar beet production, namely, the automatic digital control of the process of extracting sugar from beet chips in a diffusion apparatus, can be used for similar processes in other industries, as well as in sugar beet plants equipped with diffusion apparatuses of continuous operation, and is an improvement of the invention on author. St. No. 1293221.

The purpose of the invention is to reduce the variability of sugar losses in the pulp.

Ng the drawing shows the block diagram of the control system that implements the proposed method.

The system includes a conveyor belt 1 of beet chips, a diffusion apparatus 2. a sensor 3 of consumption of beet chips of a conveyor belt, a device 4 for communication with an object, a sensor 5 for the flow rate of a leading liquid component, a signal converter 6, a sensor 7 for sugar content in the pulp of the automatic line for determining loss of sugar in the pulp, the data entry device 8 into the control computer, which controls

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about

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a computer 9, a display device, a signal converter 11, a regulator 12, a control valve with an executive mechanism 13, a sensor 14 of a liquid phase of the fluid mixture, a regulator 15, and a control valve with an actuator 16.

The system works as follows.

The conveyor belt 1 enters the diffusion apparatus 2 and receives beet chips, the flow rate of which is measured by means of the sensor 3 of the belt weights, the output signal of which is fed to the input of the communication device 4 with the object. The device 4 is used to manually enter the required data.

P

Uh

3 to

the specified value of sugar losses in pulp in the ith control step;

dynamic coefficient of sugar loss in pulp; adjustment factor of the differential control component,

and produces a smoothing of the current values of the costs of the leading liquid component and sugar beet chips. The calculation results are displayed using the information display device 10 associated with the computer 9. The output signal is proportional to the calculated value of the amplitude of the effect in the stepwise pulse

and coesmscienters. Using the sensor for controlling the flow rate of the leading liquid flow rate, the flow rate of the leading liquid component is measured. The output signal of the sensor 5 is fed to the input of the device 4 of communication with the object and to the input of the converter 6. With the help of the sensor 7 25 of the automatic line, the sugar content in the cell is determined. The output signal of the sensor 7 is fed to the input of the device 4 of communication with the object. In the absence of an automatic line, the factor F Q is introduced.

component depending on the actual consumption of chips, the deviation from the specified value of the actual sugar losses in the pulp, the calculated value of the ratio of the flows of the leading fat component and the beet chips in the previous control step, taking into account the difference of deviations from the specified value in the current and previous control steps calculated by the machine 9, through the device 4 of communication with the object and the pneumatic converter 11 enters the input of the regulator 12, which also receives a signal from the converter 6, proportional to the actual flow rate of the master liquid component. The controller 12 controls the flow rate of the leading liquid component by means of a control valve with an actuator 13

the actual sugar content in the pulp according to the results of laboratory tests using the device 8 data entry.

The device 4 of communication with the object performs the processing of input signals and the preparation of initial information that the program enters the control computer 9, which calculates the ratio of costs and flow amplitude of the leading liquid component of the cutting mixture according to the formula

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D - KdSpT-pG)

 -nT.,).,; i)

de

.k; PG

P

, oig4 ,, are the calculated values of the ratio of the flow rates of the leading liquid component and the sugar beet chips in the i-M and (i-1) -M control steps; loss of sugar in pulp in the i-M and (i-1) -M steps of the formation of a control action;

 1-1

Regulating the flow of the leading liquid Q

five

0

five

0

five

component depending on the actual consumption of chips, the deviation from the specified value of the actual sugar losses in the pulp, the calculated value of the ratio of the flows of the leading fat component and the beet chips in the previous control step, taking into account the difference of deviations from the specified value in the current and previous control steps calculated by the machine 9, through the device 4 of communication with the object and the pneumatic converter 11 is fed to the input of the regulator 12, which also receives a signal from the converter 6, proportional to the actual flow rate of the master liquid component. The controller 12 controls the flow rate of the leading liquid component by means of a control valve with an actuator 13.

Using the sensor 14, the level of the liquid phase in apparatus 2 is measured. The output signal of the sensor 14 is fed to the input of the regulator 15, which controls the flow rate of the dependent liquid component by means of a control valve with an actuator 16.

The process of extracting sugar from beet chips using the proposed method is controlled as follows.

Based on the standard values of the ratio of the costs of diffusion juice and beet chips oi d and the output of the pulp, they determine the standard value of the coefficient, respectively. cost of consumption of a velvet liquid component and beet chips

„5 1602870 S

.. D- use in the formula for the ratio cif.,., Preceding

the national dynamic loss coefficient of sugar in pulp cd

about

To it, (ЗТ) K ,,)

6 .. to

Next hour of operation (} x}) of the field apparatus. Further control operations are performed automatically according to the program incorporated in the computer 9.

Using known formulas, the computer 9 produces a smoothing of the value of the costs of beet chips, leading to

Where

ACh- f .T About

To ... oS

n in .. to

measurement period of the control action; the average values of the delay time, the constant time of the diffusion apparatus along the dynamic channel for the formation of sugar losses in the pulp;

transmission coefficient of diffusion apparatus on the above channel; the standard value of the ratio of the costs of the leading liquid component and sugar beet chips.

The value of the period of change of the control is taken, its effect t being a value inversely proportional to the frequency f changing} and the control actions fit f.

According to experimental data, they take on the value of c. T, K. By the formula (2), the value is calculated, entered into the memory of the computer 9 using the device 8 and used to determine the calculated value of the amplitude of the leading liquid component of juice, the e-B.JK.K trumpet mixture. one).

Set the value of the coefficient of the differential component of the control action K c in the formula (1) and using the device 8, the received value is entered into the memory of the computer 9. In the process of setting up the system, the coefficient is selected so that the oscillations are S. , and P were minimal and tended to zero.

In computer memory 9 using the device. 8 introduces the value of the loss of sugar P ™. Pa first step control

Р в..к (| - () Starred average actual value of the coefficient

ratios cif.,., preceding

6 .. to

second hour of operation di (} x}) of the field apparatus Further control operations are carried out automatically according to the program incorporated in the computer 9.

Using well-known formulas, the computer 9 smooths out the value of the costs of beet chips leading

d material flow w., sugar content in pulp, related to the mass of beets in order to eliminate high-frequency interference.

Estimated amplitude value

The 5 strokes of the leading component of the cosybranch mixture are determined by the formula

m

B., K.i

m

F. crpJ

CL

f

in, g to.,

(3)

five

0

Found by formula

p is the value of m; give out

(1) and (3) through the device

with is- 13.

station 4, converter

L torus 12 and control valve

complementary mechanism

In each subsequent iitare control, the value (xig j is taken equal to 0. (i-4) 4 the calculation and control cycle repeats

The proposed method allows to reduce the variability of sugar losses in the pulp.

Formula

acquisitions

35

A method for automatically controlling the process of extracting sugar from beetroot chips in a diffusion apparatus (aut. Apparatus no. 1293221), which, in order to reduce the variability of sugar losses in the pulp, determines the difference in deviation from the specified value the actual loss of sugar in the pulp in the current and previous control steps, and the amplitude of the change in the impact in step-by-step pulse control of the veduy flow; its liquid component is adjusted depending on the obtained

irregularities.

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EH

Claims (1)

The claims 35 The way is automatic. controlling the process of sugar extraction from beet chips in a diffusion apparatus according to ed. St. No. 1293221, with the exception of the fact that, in order to reduce the variability of sugar losses in the pulp, determine the difference between the deviations from the set value of the actual sugar loss in the pulp in the current and previous steps of regulation, and the amplitude of the change in the impact of stepwise pulse flow control the leading liquid component is adjusted depending on the received deviation 50 Compiled by G. Bogachev