SU1308618A2 - Method of automatic controlling of purifying column - Google Patents

Abstract

The invention can be used in the food, chemical, petrochemical and hydrolysis industries, for example, in the preparation of hydro-water and -NI-- € Water 10 RY Grade O alcohol and is aimed at improving the quality of the alcohol produced. The direct relationship between the concentration of alcohol in the feed column and the concentration of esters and aldehydes in it was experimentally established. This method involves stabilizing the feed flow to the column and regulating the supply of water to the top of the column, depending on the concentration of alcohol in the feed. With an increase in the alcohol concentration in the raw material, the alcohol concentration sensor 20 generates a signal to the adder 19, the resulting signal from which, taking into account the temperature from the sensor 18, processes the signal to increase the water flow to the actuator 24. 1 Il. i SL C N) //

Description

1130

The invention relates to the automation of an epuration column in the distillation of alcohol, can be used in the food, chemical, petrochemical, and hydrolysis industries, for example, in the preparation of hydrolysis alcohol, and is an improvement of the automatic control of the epuration column according to auth. No. 975788.

A known method of automatically controlling an epuration column for alcohol distillation involves adjusting the consumption of steam and raw materials and measuring the temperature of the alcohol on a characteristic plate, controlling the flow of water to the upper part of the column depending on the temperature of the alcohol on the characteristic plate and columns, while the task of controlling the flow of water for dilution into the middle part of the column and the flow of raw materials is determined by the consumption of raw materials and the concentration of the components of ether aldehyde the same fraction (EAF) in the raw material 1

The aim of the invention is to improve the quality of the product.

The drawing shows the scheme that implements the proposed method.

The scheme contains a number of ep-number-1 with pipelines 2-7 to enter, respectively, power, water in the upper part of the column, phlegm, steam, epuret selection and EAF, reflux condenser 8, sensors 9 - 1T of the flow, respectively, in the upper part of the column, water for dilution into the middle part and steam associated respectively with: regulators 12–14, functional unit 15 associated with sensor 16 for raw materials consumption and sensor 17 for concentration of EAF components in raw material, sensor 18 for temperature on a characteristic plate associated with an adder 19 which is connected to a sensor 20 entratsii alcohol in the feed to the

the column. The output signal is functional 50 w in the upper part of the column 1

The main unit 15 is connected with Ux and Ux 21 reversors. The regulators 12, 13, 14, and 21 are connected to actuators 22–25, respectively, on the lines of raw material supply to the column, water for dilution in the middle part of the column, and water to the upper part columns and steam.

The method is carried out as follows.

line 3, depending on the temperature on the characteristic plate and the alcohol concentration of the diluted raw material, the signal from the temperature sensor 55 on the characteristic plate installed in the upper part of the column (on the 2-6 plate), is given to the input of the adder 19 The KOTOpoi entrance is connected to

In accordance with the measured value of the concentrations of the EAF components, the consumption of raw materials and water for dilution is measured in the middle part of the column, and the task for supplying water Q at the time instant t 4t is proportional to the measured concentration K. The coefficient K depends on the value C, and

on the supply of raw materials, Q is determined from the conditions of constant flow

 Q

from 1 + to (C-t) C

i 1 + K (C

)-with

(one)

-4t

i4ut

 K (c, Qi ,,

(2)

15

20

25

thirty

The signal from the sensor 17 of the concentration of components of the EAF in the raw materials together with the sinal from the sensor 16 of the flow of raw materials enters the functional unit 15, which generates the task of supplying water for dilution to the middle part of the column 1 via pipeline 2, depending on the measured concentration of the EAF components using ) and 2).

The output signal of the unit 15 to control the flow of water along with the signal from the sensor 10 of the flow of water enters the regulator 13, where they are compared, depending on the result of the comparison, sends a control signal to the actuator 23, which establishes the flow of water depending on the concentration EAF components in raw materials, output

40, the signal of the unit 15 to change the supply of raw materials together with the signal from the sensor 16 of the consumption of raw materials is fed to the input of the controller 21, which controls the operation of the actuator 22

45 1 change of raw material consumption depending on the concentration of EAF components in the raw material.

Regulation of water flow, podpo

Pipeline 3, depending on the temperature on the characteristic plate and the alcohol concentration in the diluted raw material, is transmitted from the temperature sensor 18 on the characteristic plate installed in the upper part of the column (on the 2-6 plate), fed to the input of the adder 19, the second input of KOTOpoi is connected to extra313

alcohol sensor 20 concentration of alcohol in raw materials. According to the results of the comparison, the adder 19 outputs a signal to the water flow regulator 12 in the upper part of the column. In accordance with the results of the comparison, the regulator 12 stabilizes the temperature on the said plates by means of an actuator 24 that changes the water supply to the upper part of the column.

When the alcohol concentration in the raw material changes, for example, the alcohol concentration sensor 20 in the raw material outputs a signal to the adder 19, the resulting signal from the latter is sent to the water consumption regulator 12 in the upper part of the column, which processes the signal to increase the water consumption. As the concentration decreases, the water flow to the top of the column decreases accordingly.

The task of steam consumption is set depending on the performance of the impeller columns, stable for several hours. In accordance with the Editor N. Gunko

Compiled by G. Bogachev

Tehred L. Serdyukova Proofreader N. Korol

Order 1774/21 Circulation 500. Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

184

With a signal from the steam consumption sensor 11, the regulator 14 stabilizes the steam supply by means of an actuator 25 installed in the steam supply pipe 5.

By stabilizing the feed flow to the column, regulating and supplying water to the top of the column, depending on the concentration of alcohol in the feed, stabilizes the flow of steam. This provides a more uniform operation and subsequent columns, as well as improving the quality of the resulting alcohol.

Claims (1)

Invention Formula The method of automatic control of the epuration column according to ed. No. 975788, distinguished by the fact that, in order to improve the quality of the alcohol produced, the concentration of alcohol in the raw materials is measured, and the flow rate of water in the upper part of the column is adjusted depending on the measured concentration.