Shanghai Hongguan discussion on the working principle of double glass reaction kettle and high and low temperature circulator

Technical requirements for double glass reaction kettle equipped with high and low temperature vacuum pump the material of double glass reaction kettle indicates that the expansion coefficient of high borosilicate glass is 3.3, which is a kind of glass with sodium oxide (Na2O), boron oxide (B2O3) and silicon dioxide (SiO2) as the basic components The content of borosilicate in this kind of glass is high, which is boron: 12.5-13.5%, silicon: 78-80% It belongs to the Pyrex glass in borosilicate glass It is characterized by small coefficient of thermal expansion, not easy to crack under the sudden change of high temperature; acid and alkali resistance, water resistance, superior corrosion resistance, good thermal stability, chemical stability and electrical performance, so it has chemical resistance, thermal shock resistance, good mechanical performance, high use temperature, high hardness and other characteristics, so it is also called heat-resistant glass, heat-resistant impact glass, and resistance High temperature glass is also a kind of special fireproof glass The main parameters are as follows: 1 Pressure test: the "glass pipe straight pipe" or "elbow" with a diameter of less than 2 inches shall be used for hydraulic test When the pressure is increased to 20kg / C ㎡, there shall be no damage In order to maintain sufficient safety factor, the service pressure shall not be greater than 4kg / C ㎡ For reactor or condenser and some thin-walled products, in order to keep enough safety factor, the use pressure shall not be greater than 2kg / C ㎡ 2 Water resistance performance: take glass powder sample with particle diameter of 0.3-0.5mm, boil it with distilled water for 1 hour, and measure the precipitation amount of Na2O, and each gram of sample shall not be greater than 0.003mg 3 Acid resistance: Boil the glass sample in hydrochloric acid with the content of 20.4% for 3 hours to measure its weight loss, which is not more than 0.7mg per 100C ㎡ surface area 4 Alkali resistance: Boil the glass sample in a mixture of NaOH and Na2CO3 with the equivalent concentration for 3 hours to measure its weight loss, which is not more than 90mg per 100C ㎡ surface area 5 Melting temperature: 1680 ℃, forming temperature: 1260 ℃, softening temperature: 830 ℃, annealing temperature: 560 ℃, hardness: technical parameters of seven levels of double glass reactor: 1) the reaction kettle is double-layer design, made of GG17 high borosilicate glass The middle jacket can be connected with a hot solvent for high temperature reaction (the high temperature can reach 315 ℃, and the solvent generally adopts a kinematic viscosity of 100; the flash point is 320 ℃; the middle jacket can also be connected with a cold solvent for low temperature constant temperature reaction (the low temperature can reach - 80 ℃); the high borosilicate produced by our factory At present, the experiment of glass shows that it can accept great temperature difference The design of interlayer has good heat preservation effect and is a good choice for constant temperature reaction 2) the 50L opening on the glass kettle body of our plant is designed with a large diameter of 265mm, which is very convenient for cleaning The outer diameter of the opening for discharging the 50L double-layer glass reaction kettle is 80mm, and the inner diameter is 40mm, and it is designed to be detachable, which is convenient for the smooth discharge of solid, particles and reaction materials with high viscosity The opening of the cover of 20L is also 265mm, and the inner diameter of discharging material is 30mm3.) the 50L double-layer glass reactor adopts a high-power mixing motor, which is stepless frequency conversion and speed regulation, and the mixing torque is 22000g.cm (when the rotating speed is 1300 / min); the mixing rod is stainless steel inner core and the outer is tetrafluoroplastic; the 20L double-layer glass reaction and mixing torque is 15000g.cm 4 The kettle cover is designed with five standard ports The 50L double-layer glass reaction kettle has 60 ports (mixing), 40 ports (condensation), 50 ports (feeding), 34 ports (standby port) and 29 ports (temperature measurement) Opening of the cover of 20L double glass reaction kettle: opening of 50 (mixing), 40 (condensation), 40 (feeding), 34 (standby), 29 (temperature measurement) 5) about the pressure resistance of the kettle body: the laboratory can generally measure the pressure resistance of the high borosilicate glass as 2-3kg / cm The vacuum degree that can be achieved inside the kettle body is -0.098mpa, which can meet the very high experimental requirements It is recommended to use the mixer with the pressure not more than 2.5kg 6.) and the mixing speed is 0-1400r / min, which can be adjusted and the rotation speed can be displayed by digital display to facilitate the observation of the reaction of materials So as to adjust the mixing speed 7.) the outer diameter of 50L double-layer glass reactor is 405mm, the inner diameter is 360mm, the overall height of support is 2.3m The outer diameter of 20L double-layer double-layer reactor is 355mm, the inner diameter is 305mm, the total height of support is 1.7m 8.) the thickness of GG17 high borosilicate glass used is 5-7mm All openings are standard lip flange openings 9.) the complete set of reaction kettle has the functions of agitation, distillation and reflux; it can do the reaction, distillation and reflux under vacuum 10.) for the high temperature reaction device, the outlet is connected with the lower opening of the reactor, and the upper reflux is connected with the lower opening Generally, the solvent is heated to the required temperature before the external circulation pump is started for circulation constant temperature.