SU802271A1 - Device for automatic control of sulfating process of organic compounds with sulfurdioxide - Google Patents

Description

The invention relates to the field of automatic control of chemical processes, in particular, devices for automatic control of the process of sulfatization of organic compounds with gaseous sulfuric anhydride and can be used in the chemical industry. A device for automatically controlling the sulf sulfation process is known, comprising a flow controller of a sulfogent and a viscosity sensor of a sulfomagnetic fll. It is also known a device for automatic control of the sulfation process, containing sensors for the consumption of primary and secondary streams of alcohol, a sensor for the discharge of exhaust gases, sensors for the concentration of sulfuric anhydride in the gas-air mixture and exhaust gases, a sensor for the flow of gas-air mixture connected to the first inlet of the gas-air regulator mixture computing unit, the first output of which is connected with the second inlet of the gas-air mixture regulator / outlet of which is connected to the gas-air mixture supply valve to the reactor op, an additional alcohol flow controller, the first input of which is connected to its flow sensor, and the output is connected to an additional alcohol flow valve 2. A common disadvantage of known devices is that they do not provide a sufficient depth of sulfation. The aim of the invention is to increase the sulphation depth. The goal is achieved by the fact that the device additionally contains the first and second and third adders, the first and second multiplication units, while the flow sensors of the main and additional alcohol flows are connected to the inputs of the first adder, the output of which is connected to the first input of the computing unit connected with its second an input with a sensor for the concentration of sulfuric anhydride in the gas-air mixture; the second output of the computing unit is connected with the first input of the third adder, connected by its output to the second, input an additional flow of alcohol flow thrustor, waste gas flow sensors and sulfuric anhydride concentration in the exhaust gases are connected to the inputs of the first multiplication unit connected by its output with the first input

the second adder, the output of which is connected to the second input of the third adder, the flow sensors of the gas-air mixture and the concentration of sulfuric anhydride in the gas-air mixture are connected to the second multiplication unit connected by its output with the second input of the second adder.

The essence of the device is based on the relationship between the amount of reacted SOg (the difference in SOj concentration at the inlet and outlet of the reactor) and the depth of sulphation — as the amount of SO increases, the depth of sulphation increases.

The drawing shows a schematic diagram of the device.

The device consists of a reactor sulphator 1, a sensor 2 for the flow of the main flow of alcohol, a first adder 3, a computing unit 4, a sensor 5 for the flow of an additional flow of alcohol, a regulator 6 and a valve 7 for supplying additional flow of alcohol, a sensor 8 and a regulator 9 for the flow of gas-air mixture, a valve 10 for supplying the gas-air mixture, sensor 11 for the concentration of sulfuric anhydride in the gas-air mixture, sensor 12 for flue gas consumption, the first 13 and second 14 multipliers, the second adder 15, the third adder 16, the sensor 17 for concentration of se anhydride in the exhaust gas.

The device works as follows.

Signals proportional to the main and additional alcohols from sensors 2 and 5 are sent to the first adder 3, the output of which is equal to the total consumption of alcohols

(Gcr The output signal of the adder 3 is fed to the first input of computing unit 4, the second input of which receives a signal from sensor 11. At the second output of block 4, a signal is generated that is proportional to the theoretical amount of SO-), which is necessary for 100% conversion of alcohols to sulfoesters according to the following expression:

Gsof K-2,1.-Gen,

where K is a constant coefficient characterizing the ratio of the molecular weights of SO- and alcohols;

2.4 - hydroxyl number of alcohols Measurement and regulation of the flow rate of the gas-air mixture is carried out using sensor 8, controller 9 and valve 10. As a variable signal, the signal from sensor 8 is controlled, and the signal from the first output is set as a reference. computing unit 4, which is defined by the expression: g - - Gcn-2.4

Sun - With

where. is the gas-air mixture consumption required for 100% conversion of alcohols, CgQ is the concentration of SOj in the gas-air mixture, measured

sensor 11,

 In block 14, the amount of SOjj entering the reactor is determined by multiplying the signals from sensors 8 and 11. The amount of 50 in the exhaust gases is determined in block 13 by multiplying the signals from sensors 12 and 17.

In the second adder 15, the number of npopped SOj is determined by summing the signals from 5 blocks 13 and 14.

The third adder 16 performs the operation of algebraic summation of signals proportional to the actual amount of SC-j, which Q reacted in the reactor (from the second adder 15) and the theoretical amount 50, which is necessary for 100% conversion of alcohols to sulfoesters (from computing unit 4) . The output of the third adder is fed to the second input of the regulator 6 of the flow rate of the additional alcohol flow.

Thus, a device for automatically controlling the process of sulfatizing organic compounds cepHfcjM with anhydride 0 conducts the process in an optimal way by maintaining an equimolar ratio between the consumption of alcohols and the consumption of SO-j at the entrance to the reactor. The disturbance effects are compensated for the flow rate and the hydroxyl number of alcohols and the concentration of SO-j by changing the flow rate of the solids. Q. The optimum sulfation depth is maintained by comparing the actual amount of 50 added in the reactor with a theoretical amount of 50, which is determined by the flow rate and hydroxyl number of the alcohols.

When checking the device on a pilot plant, it was found that the sulfation depth is increased by 1-2%, using the conventional automatic stabilization system. The sulfation depth is 95-96%, and using the device allowed to obtain a depth of 97-98%.

Claims (2)

Invention Formula Device for automatic control of sulphation process of organic compounds with sulfuric anhydride, containing sensors for the flow of primary and secondary streams of alcohol, an exhaust gas flow sensor, sensors for the concentration of sulfuric anhydride in the gas-air mixture and exhaust gases, a gas-air mixture flow sensor connected to the first input of the gas-air mixture flow controller, a computing unit, The first output of which is connected to the second; The inlet for the gas-air mixture flow control valve, the outlet of which is connected to the gas-air mixture supply valve to the reactor, the flow controller for the additional flow of alcohol, the first input of which is connected to its flow sensor, and the output is connected to the valve for supplying the additional flow of alcohol to the reactor, that, in order to increase the sulfation depth, it additionally contains the first, second and third adders, the first and second multiplication units, while the flow sensors of the main and additional alcohol flows are Connected to the inputs of the first adder, the output of which is connected to the first input of the computing unit, connected by its second input to the sensor for the concentration of sulfuric anhydride in the gas-air mixture. the second output of the computational unit is connected to the first input of the third adder, connected by its output to the second input of the flow controller of the additional alcohol flow, the flow sensors of the exhaust gases and the concentration of sulfuric anhydride in the exhaust gases are connected to the inputs of the first multiplication unit connected to the first output the input of the second adder, the output of which 0 is connected to the second input of the third adder, and the flow sensors of the gas-air mixture and the concentration of sulfuric anhydride in the gas-air mixture are connected to the second multiplication unit connected by its output with the second input of the second adder. Sources of information taken into account in the examination of 0 1. USSR author's certificate 402524, cl. C 07 V 13/02, 04.11,74. 2. USSR author's certificate No. 239243, cl. In 01 L 1/00, 06.02.68 (prototype). alcohols Echoes I-gb t eleven BE /five fS