What should be paid attention to in temperature control and use of Autoclave? The Autoclave is a high-temperature and high-pressure product, so a protective sleeve is added to the thermometer. The protective casing, as its name implies, plays a protective role, which is equivalent to that the thermometer is isolated from materials during the operation of the Autoclave. The protective sleeve itself has a wall thickness, and the heat of the material can only be transferred to the sensing rod of the thermometer through the wall thickness of the protective sleeve. The thicker the wall thickness, the slower the transfer process, resulting in a discrepancy between the measured temperature and the actual temperature. Due to the design of Autoclave in some laboratories, the height and length are different, and the length of thermometer is different.
The length of the thermometer. Due to the characteristics of the material medium and the influence of the mixing method, some thermometers may not be able to come into contact with the material due to their short length, but rather in gas phase contact, which can also result in a temperature difference.
When the volume of the laboratory Autoclave is large, the possibility of uneven temperature of materials in the autoclave increases, and there will be large differences in the upper, lower, middle and cylinder walls of the autoclave. The standard stipulates that calibration should be carried out within a certain time range. If it is not calibrated during use, it is possible that the thermometer used at this time is already damaged, and the measured temperature may be too high or too low.
The Autoclave is a reaction vessel with high-pressure operation, which is usually connected with the high-temperature working conditions in the Autoclave. So, in addition to controlling the pressure condition during operation, heating and cooling are also areas that require special attention. So:
1. The reaction kettle is prohibited from heating up too quickly or rapidly cooling during operation to prevent excessive temperature changes from causing cracks in the reactor body.
2. If the Autoclave is equipped with a Magnetic stirrer, when the temperature reaches more than 100 degrees in the reaction process, cooling water must be poured into the stirrer to avoid damage to the stirrer due to excessive temperature.
3. After the reaction of the reactor is completed, cool down first, and then release the high-pressure gas in the Autoclave to reduce the pressure to normal pressure, and then unscrew and remove the main bolts symmetrically and evenly.
Autoclave is a common pressure vessel. At present, due to the limitation of material characteristics, stainless steel is widely used as the main material of Autoclave.
Main features of Autoclave:
1. Fast heat transfer speed and multiple heating methods available;
2. High temperature and pressure resistance, corrosion resistance;
3. Hygiene, no environmental pollution;
4. The outer surface of the Autoclave is treated to be wear-resistant and beautiful.