SU853324A1 - Method of automatic control of drying process in periodic-action reactor - Google Patents

Description

(54) METHOD FOR AUTOMATIC CONTROL OF DRYING PROCESS IN A PERIODIC REACTOR OF A PERIODIC ACTION

I

The invention relates to a drying technique, in particular to the automatic control of the drying process in a batch reactor.

Methods are known for automatically controlling the drying process in a batch reactor equipped with a steam jacket by varying the steam consumption with respect to temperature, which characterizes the drying process 1.

However, the known method does not provide the required increase in productivity.

The aim of the invention is to increase productivity.

This is achieved by measuring the temperature of the reaction mixture and the temperature of the condensate formed, and these values are used as a parameter, characterizing its drying process.

The drawing shows schematically an installation for implementing the proposed method for controlling the drying process in a batch reactor.

The installation contains a reactor 1, taps 2 and 3, a refrigerator 4, a refractometer 5, a collector 6, a valve 7, resistance thermometers 8 and 9, temperature regulators 10 and 11, an instrument 12 for measuring the rate of change of the absolute value of the refraction coefficient.

This method is carried out as follows.

The resin is obtained in reactor 1. When the predetermined rate of change of the refraction coefficient is reached, the refrigerator 4 is switched to direct mode. The signal of the device 12 closes the tap 2 and opens the tap 3. Thus) the same signal turns on the controllers 10 and 11. The drying process begins. Thermomeg 9 resistance measures the temperature of the reaction mass and sends a signal to the input of controller II, the regulating action of which changes the reference to controller 10.

15 The regulating effect of the regulator 10 is supplied to the valve 7, which controls the flow rate of the coolant. This combined control action of the regulators 10 and 11 makes it possible to most effectively control the temperature of the reaction mixture at

20 of the drying stage, significantly increases the speed of regulation and eliminates the possibility of ejection of the reaction mass from the reactor 1. The end of the process

drying is determined by the device 12. When the specified value of the refractive index is reached from the device 12, a signal is turned off, turning off the regulators 10 and I.

This ends the drying process.

The described method allows to significantly increase plant capacity by increasing the reactor fill ratio and shortening the drying process.

Claims (1)

Invention Formula Method for automatic control of cyinKH process in a batch reactor action, equipped with a steam jacket, by changing the steam consumption by temperature, which characterizes the drying process, from the fact that, in order to increase productivity, the temperature of the reaction mixture and the temperature of the condensate formed are measured and these values are used as a parameter characterizing the drying process. Sources of information taken into account in the examination 1. USSR Author's Certificate No. 557246, Mkl2 F 26 V 21/00, 1975.