1.After booting up, enter the windows interface, double-click the icon to enter the main interface of the hydrogen refueling meter, as shown in the figure, to enter the main interface of the software operation.
2.For the nitrogen replacement process, under the main image interface, press the first-level menu [Service Center] - [Nitrogen Replacement] to pop up the interface shown in the figure. Replace nitrogen as prompted. When the nitrogen replacement progress at the lower end of the display reaches 100%, the nitrogen replacement is completed.
In the diagram interface, the module parameter setting part (the right part of the screen) is the parameter condition of nitrogen replacement, and the relevant parameters are set by the user according to the specific replacement conditions. The recommended setting parameters are pre-stored at the factory, and if there are no special requirements, the nitrogen replacement can be completed with the default parameters of the system.
Note: It will take a few minutes for nitrogen to be replaced, please be patient.
For nitrogen replacement, the recommended pressure valve pressure is 1MPa. Nitrogen displacement flow rate 50-100ml min
3.Set up the infusion pump as shown, set the flow rate (e.g. 1ml min), and turn the pump on. Rotate the venting valve 90° counterclockwise, and after observing the liquid flowing out of the vent valve, tighten the venting valve clockwise, observe the liquid level of the gas-liquid separator, and stop the pump when the liquid level height is about 5%. Complete pump preparation.
4.Hydrogen replacement process, under the diagram interface, select [Hydrogen Replacement], enter, and replace hydrogen according to the steps prompted on the interface. When the hydrogen replacement progress at the lower end of the display reaches 100%, the hydrogen replacement is completed.
In the diagram interface, the module parameter setting part (the right part of the screen) is the parameter condition of hydrogen replacement, and the relevant parameters are set by the user himself according to the specific replacement conditions.
At this time, the parameters are subject to the actual process parameters, including the flow rate of the infusion pump, the flow rate of hydrogen, the temperature of the preheater, the temperature of the reactor, and the pressure value of the back pressure valve.
After the hydrogen replacement is completed, start the gas-liquid separator, wait for the equilibrium of the gas-liquid separator system (judge that the standard gas-liquid separation liquid level remains stable, and there is liquid flowing out of the liquid outlet), the system pressure reaches the reaction pressure value, the preliminary preparations have been completed, and the normal hydrogenation reaction process can be entered.
5.After the reaction is terminated, stop the pump, insert the infusion pump inlet into the solvent, restart the pump, and wash (flow rate setting 3-5ml min).
6.Execute the reaction stop process, as shown in the figure, and stop the reaction as prompted. When the lower end of the display stops the reaction and the progress reaches 100%, the reaction is over.
During the depressurization process of the system, there will be a splash phenomenon at the liquid outlet, so it is recommended to fix it in order to avoid splashing to people.
Liquid tube to avoid splashing the liquid and causing the outlet tube to detach from the solvent collection bottle.
7.The nitrogen replacement process is carried out, which is consistent with the nitrogen replacement operation when the machine is turned on, and the replacement is completed.
8.Turn off the software, turn off the embedded operating computer, and turn off the main switch of the instrument. Unplug the input power cord.
It is generally recommended to stop the solvent delivery first, and then purge the nitrogen for a period of time to ensure that the solvent on the surface of the catalyst is blown clean.