SU730697A1 - Automatic control system of formaldehyde synthesis on pumice-silver catalyst - Google Patents

Description

the stroke is connected to the first input of the second ratio controller, the second input of the ratio controller is connected to the output of the air flow sensor in the air supply pipe to the alcohol evaporator, and the output of the second ratio control is connected to the actuator on the air supply pipe to the alcohol evaporator and the first actuator on the evaporator air bypass pipe, the input of the methanol consumption regulator is connected to the output of the methanol consumption sensor, and the output is connected to the input of the actuator on The methanol supply pipe, the temperature controller output is connected to the second actuator inlet on the alcohol evaporator air bypass pipe, the level regulator output is connected to the actuator on the heat carrier supply pipe to the alcohol evaporator.

The block diagram of the automatic control system is shown in the drawing.

Pipeline 1 serves methanol to mixer 2, into which, but line 3, also serves water. The alcohol – water mixture obtained is supplied via pipeline 4 to the alcohol evaporator 5. Through pipeline G to the alcohol evaporator 5, coolant is supplied, and pipe 7 - air. The mixture from the alcohol evaporator 5 is discharged through the pipeline 8. Air entering the alcohol evaporator through the pipeline 7, through the bypass pipeline 9 enters the pipeline 8, through which the mixture is fed to the contact apparatus 10.

The system for automatic control of the formaldehyde synthesis process on a pumice-silver catalyst contains a methanol consumption sensor 11, a methanol consumption controller 12, an actuator 13, a water consumption sensor 14, a first regulator 15 of the water flow ratio, an actuator 16, a level sensor 17, a regulator 18 level, actuator 19, air flow sensor 20, second ratio controller 21, unit 22 for determining air flow to an alcohol evaporator, actuator 23, first actuator 24 on the bypass air piping 9 in an alcohol evaporator 5, a temperature sensor 25, a temperature controller 26.

The system for automatic control of the formaldehyde synthesis process on a pumice-silver catalyst operates in the following way.

The sensor 11 measures the flow rate of methanol, and the sensor 14 measures the water flow, the ratio of the indicated flow rates is controlled by the first ratio controller 15, affecting the actuator 16 on the pipeline 3. The consumption of methanol is controlled by the controller 12 according to the signal from the sensor 11, acting on the actuator 13 .

The level in the alcohol evaporator 5 is measured by the sensor 17 and adjusted by the regulator 18, acting on the actuator 19. The temperature in the contact apparatus 10 is measured by the sensor 25 and adjusted by the regulator 26, the influence on the second actuator 27 on the bypass pipe 9 of the alcohol evaporator 5, Ratio air flow in the alcohol evaporator 5 and through the bypass air pipe of the alcohol evaporator 5 by affecting the executive mechanism 23 and the nerve actuator 24 on the bypass pipeline 9 of the air alcohol actuator Phone

5 is controlled by a second ratio controller 21, to which signals are received from the air flow sensor 20 and from the air flow rate determination unit 22 to the alcohol evaporator. Block 22 has a delay

changes in air consumption when methanol consumption changes, as the ratio of methanol and water changes with a delay. As block 22, a reverse predicate block may be used.

Claims (1)

Invention Formula Automatic control system the process of formaldehyde synthesis on a pumice-silver catalyst, containing a level sensor in a sheath evaporator, connected to a level regulator, water and methanol flow sensors connected through the first regulator of correlation with the actuator on the water supply pipe to the alcohol evaporator, the temperature sensor in the contact apparatus connected to the temperature regulator, the sensor air flow and the actuator on the air supply pipe to the alcohol evaporator, the actuators on the methanol and coolant supply pipe to the alcohol evaporator, characterized by the fact that, in order to increase the process performance, it is equipped with a unit for determining the air flow to the alcohol evaporator, the second ratio regulator, the methanol consumption torus, the first and second actuators on the bypass air line spirtoisparitel methanol connected to the output of the flow sensor, the output is connected to a first input of a second regulator ratios torus, the second input of the regulator connected to the output ratios of the air flow sensor to the feed pipe air to the alcohol evaporator, the output of the second ratio controller is connected to the actuator on the air supply pipe to the alcohol evaporator and the first actuator on the bypass pipe of the alcohol evaporator air, the input of the methanol consumption regulator is connected to the output of the methanol consumption sensor, and the output is connected to the input of the pipeline mechanism supply of methanol, the output of the temperature regulator is connected to the inlet of the second actuator on the bypass pipe of the air alcohol Yield a level controller coupled to the actuator to supply heating medium conduit in spirtoisparitel. Sources of information taken into account in the examination 1. Barlasov B. 3. Calculation of the settings of the system for automatic regulation of the process of alcohol, - “Chemical industry, 1965, № 5, p. 366-368.