Glass reactors vessel are widely used in modern fine chemicals, bio-pharmaceuticals, scientific research experiments, etc., and need to do various tests under various conditions (including: constant speed, constant force, constant temperature) (including: concentration, distillation, retention, separation) , purification reaction), is the ideal instrument for teaching, experiment, pilot test, production. However, there are still some laboratories that build their own reactors. Although the economy is simple, from the safety point of view, the installation and disassembly of the whole set of equipment, fixed support, smooth and safe rotation of the mixing motor, reaction bottle thickness and pressure resistance, heating pot / heating jacket Temperature control accuracy and over-temperature protection, rapid exothermic/endothermic buffering measures in the experimental process, sample recovery, anti-corrosion of sealing parts, etc. all have certain experimental risks, which cause anxiety and affect the efficiency of the experiment!
Users should choose the glass reactor and temperature control equipment should pay attention to the problem:
1. Circulating jacket inlet and outlet interface
Jacketed glass reactor circulating medium inlet and outlet We mainly use the flange interface, which avoids the use of the pagoda interface to easily generate resistance affecting the flow rate of the circulating medium. The high-speed flowing liquid will also form the impact on the glass and thus form the pressure on the jacket. Some drawbacks.
2. Built-in coil
The accessory also functions as an auxiliary heating or cooling function, does not affect the amplification of the paddle, is easy to disassemble and clean, and can be replaced.
3. Insulation measures
The use of the outer layer insulation sleeve and the circulating medium pipe insulation sleeve can effectively reduce the heat exchange between the equipment and the outside air, thereby improving the temperature rise and fall, and avoiding the selection of equipment with higher power and higher price.
The glass reactor equipment has a large contact area with air, and the temperature rise and fall speed cannot be sacrificed because the visualization of the reaction process is required. The outer layer of the outer layer of the kettle can be used to solve this contradiction.
It is also a good choice to use a reactor with a vacuum sandwich:
When the
lab jacketed glass reactor vessel adopts a three-layer design, the outer jacket is vacuumed and closed to form a vacuum interlayer, so that the reaction heat preservation effect is good. Moreover, when the temperature is low, the surface of the outer glass will not be frosted, and the reaction will be clearly visible; when the temperature is high, the surface of the outer glass will not be hot, and the danger of burns can be avoided.
Maintenance and safety
1. Double-layer glass reactor should be used strictly according to the working pressure and working temperature marked on the product nameplate to avoid danger;
2. Strictly abide by the provisions on cooling, oiling, etc. in the product instruction manual, and do a good job in maintenance and maintenance of the equipment;
3. When all valves are used, the valve stem should be rotated slowly to close the cover to achieve the sealing effect. It is not easy to use excessive force when closing, so as not to damage the sealing surface;
4. The electrical control instrument of the double-layer glass reactor should be operated by a special person and the overload protection facilities should be set as required.
5. The operation and maintenance personnel of the double-layer glass reactor should remove the hard objects such as watches and rings during operation or maintenance to avoid damage to the glassware. In particular, the diamond ring will be fatal to the glass fittings. hurt.
Common failure phenomena and causes of double-layer glass reactor equipment
1. Turn on the power switch, the indicator light does not light: the external power supply is not connected or the contact is bad. Please check the power supply and socket with a professional electrician;
2. Short-circuit of the fuse: put the power switch in the OFF position, and then replace the fuse;
3. The power indicator light is on, but it does not rotate: the rotating shaft is rusty, stop using, and contact the supplier. Motor, electrical box failure, not connected to the seven-pin plug, reconnect the seven-pin plug;
4. The vacuum suddenly disappears: the glass has cracks and the switch is damaged. Check the glass parts and change the switch;
5, there is a vacuum, but can not pump: the seal ring wear, connect the vacuum switch leak, please replace the seal ring, switch;
6. Sometimes there is no vacuum: there is looseness on the steel shaft. Please remove the dirt and check the vacuum gauge and vacuum pump.
7. Vacuum hose aging: Please replace the vacuum hose.
