What are the electrical safety considerations when using a double layer glass reactor in the laboratory?

What are the electrical safety considerations when using a double layer glass reactor in the laboratory?

In laboratory settings such as chemical synthesis and pharmaceutical research and development, jacketed double layer glass reactors have become indispensable equipment due to their advantages of corrosion resistance and high transparency. However, electrical safety issues are often overlooked, and improper operation can lead to equipment damage, data loss, and even personal injury.

1、 Before device activation

Glass layer integrity verification

Observe the inner and outer walls under strong light. If there are slight cracks or bubbles, they may burst due to temperature changes during operation.

Aging detection of power cord:

Pay close attention to whether the plug connection is exposed and whether the wire body is bent or damaged. A certain university once caught fire due to a short circuit caused by an internal break in the power cord.

Double confirmation of ground wire system:

Use a multimeter to measure the resistance of the ground wire, ensuring that the resistance is ≤ 4 Ω, to prevent the accumulation of static electricity or leakage.

2、 Power configuration

Unlike conventional instruments, double-layer glass reactors are highly sensitive to electrical environments

Non optional voltage regulator:

When the voltage fluctuation exceeds ± 10%, an online UPS or regulated power supply must be equipped. A certain pharmaceutical company suffered motor burnout due to unstable voltage, resulting in a loss of reaction material value exceeding 200000 yuan.

Principle of independent circuit:

It is strictly prohibited to share sockets with high-power equipment such as muffle furnaces and centrifuges. It is recommended to install 16A industrial sockets and label them with special signs.

3、 Operating standards

During the experiment, it is necessary to strictly prevent liquids from entering the electrical system

Double sealed protection:

Install a silicone waterproof sleeve at the connection between the kettle body and the motor, and ensure that the condensate outlet is lower than the interface to prevent backflow.

Emergency power outage:

If liquid is found to have seeped into the motor, immediately press the red emergency stop button and do not directly unplug the plug (which may generate electric sparks).

Explosion proof environment upgrade:

In the operating area, explosion-proof frequency converters must be selected and equipped with combustible gas alarms.

4、 Operation monitoring

Abnormal phenomena during equipment operation are precursors to faults

Abnormal noise diagnosis:

The dull buzzing sound may be due to rotor eccentricity.

Temperature rise threshold:

If the surface temperature of the motor exceeds 60 ℃ (which can be monitored by an infrared thermometer), the machine should be stopped immediately.

5、 Establish periodic maintenance

Developing a maintenance calendar can effectively extend the lifespan of equipment

Monthly maintenance: Clean the dust from the heat dissipation holes and lubricate the mechanical seals (recommended to use perfluoropolyether grease).

Quarterly testing: Entrust a third-party to test the voltage resistance performance to ensure that the 10kV insulation resistance meets the standard.

Annual overhaul: replace carbon brushes and check the capacity degradation of the inverter capacitor.

6、 Emergency response

In the event of a sudden electric leakage accident

Cut off the main power supply with an insulated hook rod and do not touch the equipment with bare hands.

Cover the fire area with a fire blanket and strictly prohibit using water to extinguish electrical fires.