SU1059390A1 - Method of automatic control of process of spray drying - Google Patents

Abstract

THE METHOD OF AUTOMATIC CONTROL OF THE PROCESS OF THE SPUTTERING SURFACE by measuring the initial and final temperatures of the coolant and changing the fuel consumption depending on the flow rate of the dried material, characterized in that, in order to increase the control accuracy, determine the flow temperature difference between the measured and the warmth heat. and the calculated values of the final temperature of the coolant, according to this hinge, correct the resulting temperature difference and return Correct this signal for fuel consumption. . (L SL; about 00 th

Description

The invention relates to a drying technique, in particular to the automation of spray drying processes.

Methods are known for automatically regulating the spray-drying process by measuring the initial and final temperatures of the heat transfer medium and changing the fuel consumption depending on the consumption of the material to be dried 1.

However, the known method does not provide the required control accuracy.

The aim of the invention is to improve the accuracy of regulation.

The goal is achieved by the fact that according to the method of automatic control of the spray drying process by measuring the initial and final temperatures of the coolant and changing the flow rate of the fuel depending on the flow rate of the material being dried, the temperature between the measured and calculated initial temperatures of the coolant and the amount of the measured and pia are determined counting values of the final temperature of the coolant, according to this “sum, correct the resulting temperature difference and affect for this corrective sngnesu On fuel consumption.

The drawing shows a block diagram of a device that implements this method.

The device contains a dryer 1 / furnace 2, a system 3 for controlling the flow rate of the material being dried, a system 4 for adjusting the initial temperature of the heat carrier, a set 5 for measuring the temperature of the spent heat carrier, a variable 6. transfer numbers j adder 7, block

8 mass coefficients, adder 9.

The device works as follows.

The flow rate of the starting material is measured using system 3 and using a variator of 6 gear ratios, we obtain | counted values of the initial temperature of the coolant

T |, the calculation and temperature of the spent coolant T, the calculation with the minimum fuel consumption in the process suzhi. Using set 5, measure

the current value of the spent coolant () and compare it in block 8 with the calculated value of the temperature of the spent coolant (T radix) "

BT I calculation i According to the algebraic Sunal of these values, taking into account the coefficient determined by block 8, a correction value is obtained (fcT, core)

, ar. - uT, j .. K ,;

Using system 4, the current value of the initial temperature of the heat transfer fluid (.) Is measured and compared with the received-on adder.

9 calculated (T takes into account the correction values (T, Cor)

± (T,

± .oJ

6T

Check I. / 1 calculation - mkor / The value of a T is the setting of system 4 for controlling the initial temperature of the coolant. i Thus, the proposed method c66 will improve the accuracy of regulation in the conditions of fluctuations of the concentration of the material being dried.

Claims (1)

METHOD FOR AUTOMATIC RESULTS OF THE “SPRAY DRYING” process by measuring the initial and final coolant temperatures and changing the fuel consumption depending on the flow rate of the material being dried, characterized in that, in order to increase the accuracy of regulation, the temperature difference between the measured and calculated values of the starting coolant temperature is determined and> the sum of the measured and calculated values of the final temperature of the coolant, according to this scoop, the resulting temperature difference and exposure are adjusted comfort on this corrective signal for fuel consumption.