SU415291A1 - - Google Patents

Description

The invention relates to the region of the automatic control of production processes, namely, the methods of the automatic control of the process of preparing a batch, and can be used in the production of ethyl alcohol from grain-potato raw materials.

There is a known method of automatically controlling the process of preparing a batch in the production of ETHYL alcohol from grain-potato raw materials, which consists in measuring the flow rate of the raw material and the concentration of the batch and in regulating the water supply.

In order to improve the quality of the batch according to the proposed method, the concentration of the raw material is determined, and the regulation of water iodine is carried out according to a nonlinear law, which is determined by the following

".CrV-iОзСзз

+ “1 - Qai where

Qs - raw material consumption. Sz - concentration of raw materials. Szm - the current value of concentration

kneading. task concentration value

kneading.

QI and 02 are constant coefficients. The drawing shows a diagram of the device for implementing the proposed method.

The device is composited IZ smesitol -predrazvar11ika, KOTopi ii; the grain is supplied with the consumption of Qs and KuiiHeHiranney S. — n water, the consumption of QR, which is regularly affected;

block 2

not tempering, which come in meaningfully; volichpp Q n

measured tei yhint

Sz adder 3, on -OTopbiii ppdatsi rezul) tuyuyushi signal and the calculation of Taegs corresponding to a given value of i oiriipirrpatsii SzG,; b.yuka 4 division, where the output signal is divided from 3 per signal, corresponding to the current value of the con- centration of the mixer of adder 5, into which the resulting signal is FROM the division unit and where it is added to some constant signal o, and the received signal corresponding to the flow is taken from QT grains; adjustable, his claian 6, which changes the flow of water into the mixer, which, by tension, equalizes the resulting signal of the cy simulator.

The next method is as follows.

When measuring continuously flowing into the mixer-predrazvarnik 1 (object) of water flows and grains, we manufacture grain pipelines corresponding to the values of grain consumption, water consumption, and zeria concentration.

The segial corresponding to the concentration of the grain Cz enters the multiplication unit, where

multiplies with a signal corresponding to 1D11-1 consumption of scpiia Qa. The output signal from the multiplication unit corresponds to the value of QaC-j and is fed with a plus to the adder 3, in which the signal corresponding to a given value of the concentration of the mixing Szm with some constant coefficient yo is subtracted from it. Thus, the resultant signal from adder 3 corresponds to the value of / - / -t / ass

Cheziyu UzSz-Yaa -mz Received snngal is introduced in the form of a dividend into the division unit, where it is divided into sigal, corresponding to the current value of the concentration of the mixture - Szm, and the resulting signal from the division unit corresponds to

P r p r

  I / .i

The received signal is added in the adder 5 with a constant but the value of the signal corresponding to the value of the constant coefficient ai, and the signal corresponding to the consumption of grain Qs is subtracted from the sum obtained.

The resulting signal controlling the flow of water to the mixer corresponds to the value described by the following formula

(Q.C, q, Cll .-} - a, -Q,

/ zm

The mixer-pre-breakawarer (object) equation is recorded as

dC, jdt + C3 „(Q3 + QB) QsQ. (I)

Substituting the control signal, its signal, corresponding to the value derived above in equation (I), gives the law of concentration control in the form of the equation

dC, Jdt + a, C, a, Cf, f, (P)

where and 2 are constant coefficients determined by calculation to give

the law (II) of such properties as stability, duration of the transition process, its quality, etc.

As follows from law (II), the magnitudes of disturbing influences Q. and C3 do not enter into it, and the transition process in the automatic control method when changing a given concentration value of the mixing of a SC has always a constant form (II) in any object state.

Depending on the magnitude of the load, the variable dynamics of the object does not affect the quality of control by the proposed method. Change in input values (disturbances)

the consumption of grain concentration Q and Cs does not cause a transition process in the object along the concentration channel due to the fact that the proposed method of automatic control is carried out by the law of control,

invariant to perturbations.

Subject invention

The method of automatic control of the preparation process of the mixture in the production of ethyl alcohol from grain-potato-raw materials, consisting in the measurement of raw material consumption and concentration of mash and in the regulation of water supply, which differs from that, in order to increase the quality of the kneading, the concentration raw materials, and the regulation of water supply is carried out according to a non-linear law, described by the following formula

Q, C, - a, O + «- 3, where

- rSM

Qs - raw material consumption. Sz - the concentration of raw materials

Szm - the current value of concentration

kneading.

back

Szm - the specified concentration value

kneading. GI and a-, are constant coefficients.

Zamgs