Introduction of double-layer glass reactor system 1. Description of double-layer glass reactor material The expansion coefficient of high borosilicate glass is 3.3, with sodium oxide (Na2O), boron oxide (B2O3) and silicon dioxide (SiO2) as the basic components Kinds of glass. The content of borosilicate in this kind of glass is relatively high, respectively: boron: 12.5 ～ 13.5%, silicon: 78 ～ 80%. Therefore, this kind of glass is called high borosilicate glass. It belongs to Pyrex glass in borosilicate glass. It is characterized by a small thermal expansion coefficient, which is not easy to burst under a sudden change of temperature at high temperature; it is acid and alkali resistant, water resistant, and has excellent corrosion resistance. It has good thermal stability, chemical stability, and electrical properties, so it has chemical resistance and resistance. Thermal shock resistance, good mechanical properties, high use temperature, high hardness and other characteristics, so it is also known as heat-resistant glass, heat shock-resistant glass, high temperature glass, and is also a special fire-resistant glass. http: // Ergo Chair,High Quality Ergo Chair,Ergo Chair Details, CN Queen Furniture Co., Ltd. , https://www.queenfurnitures.com
The main parameters are as follows:
1. Pressure resistance test: use the "glass pipe straight pipe" or "elbow" with a diameter of 2 inches or less to make a hydraulic test. When it is pressurized to 4kg / cm2, there must be no damage, in order to retain enough The safety factor, the use pressure should not be greater than 2kg / cm2.
In order to maintain a sufficient safety factor for reaction kettles or condensers and some thin-walled products, the operating pressure should not be greater than 2kg / cm2. 2. Water resistance: take particles in a glass powder sample with a diameter of 0.3-0.5mm and boil it with distilled water 1 hour, the amount of precipitated Na2O was measured, and the sample should not exceed 0.003 mg per gram.
3. Acid resistance: The glass sample is boiled in hydrochloric acid with 20.4% content for 3 hours to measure its weight loss. It is not more than 0.7mg per 100cm2 of surface area.
4. Alkali resistance: The glass sample is boiled in a mixed solution of 1 equivalent concentration of NaOH and 1 equivalent concentration of Na2CO3 for three hours, and its weight loss is measured, and it is not more than 90mg per 100cm2 of surface area.
5. Melting temperature: 1680 ℃, molding temperature: 1260 ℃, softening temperature: 830 ℃, annealing temperature: 560 ℃
About the technical parameters of double-layer glass reactor:
1.) The reaction kettle is a double-layer design, GG17 high borosilicate glass material, the middle jacket can be passed through a hot solvent for high temperature reaction (the maximum temperature can reach 315 ℃, the solvent generally uses a kinematic viscosity of 100; the flash point is 320 ℃ Dimethyl silicone oil,); the middle jacket can also be passed into a cold solvent to do low temperature and constant temperature reaction (the lowest temperature can reach -80 ℃); the high borosilicate glass produced by our factory has proved that it can accept a large temperature difference, The design of the interlayer has good thermal insulation effect and is a good choice for constant temperature response.
2.) The opening of the glass kettle body of our factory is designed with a large diameter of 265mm, which is very convenient for cleaning. The lower discharge material is designed to be detachable with PTFE, which is convenient for the smooth release of solids and particles and reaction materials with large viscosity.
3.) The double-layer glass reactor uses a high-power stirring motor with stepless speed regulation, the stirring torque is 15000g.cm (at a speed of 780 / min); the stirring rod is a stainless steel core, and the outside is PTFE plastic;
4. The kettle lid is designed with five standard ports. The opening of the double-layer glass reactor kettle lid: 50 # (stirring), 40 # (condensation), 40 # (feeding), 34 # (spare port), 24 # (temperature measurement ) Opening. The opening can be customized according to user needs
5.) Description of the pressure resistance of the kettle body: the laboratory can generally measure the pressure resistance of the high borosilicate glass to 0.8kg / cm. The vacuum degree that can be achieved inside the kettle body is -0.098MPA, which can meet very high experiments Claim.
6.) The stirring speed of the machine is 0-780r / min, which can be adjusted and the speed is displayed digitally, which is convenient for observing the reaction of the materials. Thereby adjusting the stirring speed.
7.) The thickness of GG17 high borosilicate glass is 7mm. All openings are standard lip flanges.
8.) The complete set of reaction kettle has the functions of stirring, distillation and reflux; it can be used for reaction, distillation and reflux reaction under vacuum.
9.) For high-temperature reaction devices, the outlet is connected to the lower port of the reactor, and the reflux above is connected to the lower opening.
Simple troubleshooting
1. Turn on the power switch, the indicator does not light. If the external power supply fails or the contact is poor, please have a professional electrician check the power supply and socket.
2. Short-circuit the fuse, put the power switch to the OFF position, and then replace the fuse.
3. The power indicator lights, but does not rotate. Rotating shaft is rusted and stopped to use, please contact the motor, the electrical box is faulty, the seven-core plug is not connected, and the seven-core plug is reconnected
4. The vacuum suddenly disappears, the glass is cracked, the switch is damaged, check the glass parts, replace the switch
5. There is vacuum, but the seal ring is not pumped and worn. If the vacuum switch is connected, please replace the seal ring and switch.
6. Sometimes when there is no dirt on the steel shaft when the connector is loose, please remove the dirt, check the vacuum gauge, vacuum pump
7. Vacuum hose is aging, please replace the vacuum hose
8. The main shaft of the main machine is loosened and the top screw is loosely tightened.
10. The temperature of the motor is too high (room temperature plus 40 ° C is normal). If the machine is overloaded and stopped, turn the shaft by hand. Is it heavy?
11. The speed display does not match the actual voltage is unstable, and there is an error with the supplier.
12. There are cracks in the heating tube of the casing