What are the key points to note when using a hydrogenation reactor?

What are the key considerations when using a hydrogenation reactor?

The main feature of the hydrogenation reactor is its static sealing structure, in which the agitator and motor are driven via a magnetic coupling. Thanks to this non-contact torque transmission, static seals replace dynamic seals, effectively eliminating leakage during agitation and ensuring that both the entire medium and the agitating components operate under sealed conditions. This product is an ideal leak-free reaction equipment for processes such as vulcanization, fluorination, hydrogenation, and oxidation in industries including petroleum, chemical engineering, organic synthesis, polymer material polymerization, and food processing.

When using a hydrogenation reactor, please pay close attention to the following matters:

1. Sealing performance

The hydrogenation reactor is a precision piece of equipment. Its sealing ring employs a conical surface contact sealing mechanism: by tightening the main bolts, the surfaces are pressed tightly against each other, achieving the desired seal. Therefore, special care must be taken to protect the sealing cone from damage caused by various impacts. When installing the lid, first place the reactor vessel onto the base, then carefully position the reactor lid onto the vessel according to its designated alignment. When tightening the main bolts, tighten them symmetrically in a diagonal pattern several times, applying even pressure throughout. The lid must not tilt to one side to ensure a proper seal; moreover, the tightening torque must not exceed the specified limit, as this could damage or prematurely wear the sealing surfaces. During assembly, all threaded connections should be coated with oil or a mixture of oil and graphite. If the sealing surfaces become damaged, they must be reworked and repaired before the reactor can regain its optimal sealing performance.

2. Sealed operation

The air inlet and drain valve are sealed by needle valves. When closing, simply turn the valve needle gently and press firmly against the valve cover to achieve a good seal. Avoid applying excessive force to prevent damage to the sealing surfaces.

3. Heating and Pressurization Test

Before use, the hydrogenation reactor should be heated and pressurized for a leak-tightness test. The test medium can be either air or nitrogen, but it is preferable to use an inert gas. The use of oxygen or other flammable and explosive gases is strictly prohibited. Heating and pressurization must be carried out slowly. The heating rate should not exceed 80°C per hour. During the pressure test, connect the inlet valve of the hydrogenation reactor to the compressor (or high-pressure pump) using a connecting pipe. Pressurization should be conducted in several steps, each step increasing the pressure by 20% of the working pressure, with a 5-minute hold time at each stage. When the test pressure is reached, hold it for 30 minutes to thoroughly check for leaks. The test pressure should be 100–105% of the working pressure. If a leak is detected, first reduce the pressure and then carefully tighten the nuts and fittings as appropriate. Under no circumstances should nuts and fittings be tightened under high pressure.

4. Cooling process

During the reaction process, avoid sudden cooling or heating to prevent cracking of the reactor vessel due to excessive thermal stress. After the reaction is complete, first allow the temperature to decrease—either by water cooling (for exothermic reactions) or air cooling—and then release the high-pressure gas from inside the reactor to bring the pressure down to atmospheric level. Next, carefully and evenly unscrew the bolts in a symmetrical manner. During the opening of the lid, pay special attention to protecting the sealing surface; lift the lid uniformly to avoid damaging it by collision with the sealing ring on the reactor body. 5. Subsequent Processing

After each hydrogenation reactor operation, residues on the reactor body and lid should be cleaned thoroughly. All sealing surfaces on the hydrogenation reactor should be regularly cleaned and kept dry. The use of hard or soft objects with rough surfaces for cleaning is strictly prohibited.