Supercritical fluid phase equilibrium systemdesign scheme

1、 Function

The design of this instrument is multifunctional, capable of studying phase equilibrium and reaction research.

2、 Instrument structure and technical specifications of each component

（1）Workflow

（2）Main component diagram

picture1 High pressure window kettle

1Pressure regulating valve

YT-5Type pressure regulating valve: inlet pressure32MPaExport pressure0～16MPaAdjustable.

Function of pressure regulating valve: ①. Pressurize the solvent tank to liquefy the solvent;

② Add a pressure relief valve to the top of the pressure relief valve to control the pressure in front of the pressure relief valve;

③ Adjust the nitrogen pressure to flush the high-pressure reactor and pipeline cavity.

2Solvent tank

Volume of solvent tank1500mLpressure resistance10MPa

The solvent tank is equipped with the following interfaces:

Nitrogen pressurization port, separator solvent recovery port, solvent injection port, vent port, pump suction port.

3Double plunger pump

model:ZJ—Xtype

internet traffic4L/minPressure50MPa；

4Pressure transmitter

modelDG1300-BZ-A-2-60

Accuracy:0.5%F.SPressure60MPa

5Pressure digital display gauge

modelWP-C903-01-12-HL-P

The pump injection pressure is displayed, and the maximum pressure of the pump can also be set through this gauge. When the pressure exceeds the set value After pressure, the pump can automatically control the injection pump switch. Please refer to the instrument manual for specific setting methods.

6Preheating furnace

maximum temperature200℃, heating power1KwUsed for preheating the medium entering the high-pressure reactor.

7High pressure vessel

Window high-pressure reactor: pressure less than20MPaThe working temperature is less than200℃, volume200mL;

The bottom of the high-pressure vessel is equipped with a magnet for stirring, and the stirring speed is infinitely adjustable and can be displayed.

The plunger inside the high-pressure vessel is movable and used for volume changes inside the vessel. The bottom of the vessel can be opened.

8Thermostatic box

Working temperature of the constant temperature box200℃, temperature controller display accuracy±1At ℃, there are glass windows in front and behind the constant temperature box, and a spotlight is installed on the rear window for easy observation of the phase inside the kettle.

9Solvent separator

volume30mLWorking temperature200℃, pressure10MPa

Heating power:500WThe bottom cover is detachable.

10Backpressure control

Top loading type, by adding control pressure at the top of the back pressure valve, the working pressure50MPa.

3、 Use of instruments

1. Safety

a.Equipment and personal safety, instruments must have reliable grounding;

b.When using preheating furnaces and other heating equipment, the temperature is very high, and extra care must be taken during operation to prevent burns;

c.Equipment and pipeline joints must be tightened and regularly inspected for their condition, especially when using gas, extra caution must be taken to prevent injury from high pressure.

2Pressure regulating valve

When the handle is rotated counterclockwise to the loosened state, the pressure regulating valve closes, the air path is cut off, and the pressure is increased in a clockwise direction Rotate the handle, increase the amount of rotation, and correspondingly increase the pressure of the discharged gas. When the required pressure is reached, stop rotating the pressure regulating valve.

3Double plunger metering pump

Please refer to the pump user manual for details

4Preheating furnace

Turn on the heating switch of the preheating furnace, set the working temperature on the preheating furnace temperature controller, and the preheating furnace will be automatically heated by the temperature controller. The temperature setting method is detailed in the temperature controller user manual.

5High pressure vessel

stir:First, turn the speed control knob to0Turn on the mixing switch and gradually adjust the speed control knob. The mixing speed is displayed on the digital display.

Variable volume:There are pump inlet, stop, and outlet switches on the control panel. When the switch is turned to the inlet position, the pump plunger advances and the volume inside the kettle decreases. When the switch is turned to the stop position, the pump stops moving. When the switch is turned to the pump retraction position, the pump plunger retracts and the volume inside the kettle increases.

Temperature inside the kettle:Measured by a high-pressure vessel temperature measuring instrument.

6Return pressure valve

Adjust a certain control pressure with a pressure regulating valve, load it onto the top of the back pressure valve, and the back pressure valve can control the reverse pressure The pressure inside the kettle works at this pressure, and when the pressure inside the kettle exceeds the control pressure, the pressure relief valve automatically releases pressure and empties.

7. Separators

Turn on the separator heating switch, set the operating temperature on the separator temperature controller, and separate Heating is automatically controlled by a temperature controller.

8Cooling device

Connect to cooling water for cooling.

9Sweep air

Open the scavenging valve and use nitrogen to clean the reactor and the inside of the tube.

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