Pyromellitic dianhydride teaching factory for teaching and training

[0018] The present invention will be further described below in conjunction with the drawings.

[0019] Such as figure 1 As shown, a pyromellitic dianhydride teaching factory for teaching and training includes a chemical plant production area 1, a chemical plant control area 2, and a teaching discussion area 3.

[0020] Among them, there is a small pyromellitic dianhydride production plant in the chemical plant production area. The small pyromellitic dianhydride production plant includes chemical equipment, chemical instruments and device frames. The device frame is a steel platform, and chemical equipment and chemical instruments are installed. On the steel platform, chemical instruments and chemical equipment are connected by pipelines and cables.

[0021] The control area of ​​the chemical plant is composed of a control cabinet and an industrial computer, and is connected with the above-mentioned small pyromellitic dianhydride production device through a signal cable.

[0022] The teaching discussion area includes student computers, multimedia teaching facilities and simulation software.

[0023] Such as figure 2 As shown, the above-mentioned chemical equipment includes: electromagnetic fan, air buffer tank, vaporizer, air preheater, reactor, trap, water absorber, flow meter, pressure transmitter, electromagnetic valve, electric regulating valve, etc.

[0024] The chemical equipment includes electromagnetic fans, air buffer tanks, vaporizers, air preheaters, reactors, traps, water absorbers, flow meters, pressure transmitters, electromagnetic valves, electric regulating valves, etc.

[0025] Further, the flow meters include mass flow meters and wet gas flow meters.

[0026] Furthermore, the control cabinet is composed of domestic intelligent instruments, including intelligent regulators, flow totalizers, measurement alarms, etc.

[0027] Further, the industrial computer is configured by domestic configuration software to realize the control process of the device. It has a three-dimensional interface with animation function. It also has real-time data collection, data history storage, real-time data display, historical data query, report query, curve drawing, report report Curve printing, PID parameter tuning function.

[0028] The simulation operation software is realized by the domestic configuration software configuration like the device operation software, and the operation interface is the same as the operation station interface.

[0029] The operation process of the present invention is as follows:

[0030] (1) Weigh the vaporizer 3 with mesitylene, and at the same time weigh the weights of the first trap 7 and the second trap 8. The second trap should be weighed together with the inner cotton; (2) Control The process flow chart installs each part of the instrument, pay special attention to the connection of the connection pipe and the connection pipe to avoid air leakage; (3) Check the liquid level of the water absorber 9 and replenish the water to the specified position, and close the water inlet valve in time after replenishment; (4) ) Check whether the drain valve at the bottom of the air buffer tank 2 is closed; (5) Turn on the power of the device and enter personal information according to the login interface; (6) Check whether the display of each meter is correct, if there is an error message, find the fault and repair it; (7) (8) When the temperature of the first air preheater 4 and the second air preheater 5 rise to 150°C, open the solenoid valve 16. Set the opening degree of the regulating valves 13, 14 and start the electromagnetic fan 1 to preheat the system; (9) When the reaction temperature reaches about 20-30°C lower than the predetermined reaction temperature, open the electromagnetic valve 15 and close the electromagnetic valve 16. Connect vaporizer 3 and reactor 6 for oxidation reaction; (10) Every 10 minutes, record primary air flow 11, secondary air flow 12, tail gas flow 10, temperature, phenomenon, etc.; (11) When the end of the reaction is confirmed, turn on Solenoid valve 16, close solenoid valve 15, cut off the connection between the reactor and the vaporizer, continue to purge with hot air for 15 minutes, stop heating; (12) turn off fan 1, open buffer tank 2 drain valve; (13) set regulating valve 13 , 14 The opening degree is set to 0 and the power is turned off, and the solenoid valve 16 is turned off; (14) Exit the system, and the system will automatically shut down; (15) Take out the vaporizer 3, the first trap 7 and the second trap 8, respectively weigh the vaporizer 3 and the trap The weight of 7, 8 is used to obtain the consumption of mesitylene and the total weight of crude anhydride by subtraction method. The content of dianhydride in the crude product is analyzed by chromatography; (16) cleaning supplies and work area. Real-time data, historical data query, report query, curve drawing, report curve printing and PID parameter tuning can be viewed on the operating station at any time during operation.