Distillation Purification Technology is a thermodynamic
separation process. It uses the different boiling points of components in a
mixed liquid or liquid-solid system to evaporate low-boiling components and then
condenses to separate the entire component. The unit operation process is
evaporation and condensation Combination of two unit operations. Compared with
other separation methods, such as extraction, filtration and crystallization, it
has the advantage that it does not require the use of solvents other than system
components, thereby ensuring that no new impurities are introduced.
Distillation Purification Technology
Preparation for inspection
Check whether all valves, electrical appliances and meters are in good
condition. Fill out and hang the running status card.
Operation
1. Turn on the pump to feed, add the material to 1/2 of the second sight
glass in the evaporation chamber, and turn off the pump.
2. Open the steam valve and start heating. At the same time, open the
distillate return valve and the condensate valve.
3. Sampling and analyzing the alcohol content of the distillate and adjusting
the reflux valve. After the alcohol content is qualified, open the discharge
valve and put the alcohol into the alcohol storage tank.
4. According to the amount of alcohol in the evaporation chamber, timely
replenish low-concentration alcohol, and adjust the return valve after
feeding.
5. When the alcohol content in the evaporation chamber is 5% or less, stop
the distillation and open the drain valve to discharge the residual liquid.
6. After the distillation is completed, close the steam valve and the cooling
water valve.
7. Clean the equipment according to cleaning procedures.
Maintenance
1. In the distillation column of this device, the materials in the column are
very clean and pollution-free, and its seal can be generally checked for many
years. Only when the distillation effect of the packing is significantly
reduced, the whole tower needs to be disassembled, and the packing is taken out
and replaced. Packings and flanges, and the whole tower air tightness test.
2. During the annual overhaul, the dirt in the heating room should be
carefully cleaned, and the inner wall of the evaporation room should be washed
with a brush.
3. During the annual overhaul, chemical cleaning agents should be used to
clean and descale the outer walls of the tubes in the condenser and cooler. 4.4
During overhaul, instruments and meters should be checked and calibrated to keep
them in good condition.
4. During the overhaul, check the flanges, valves, pipe fittings, etc.
carefully, and replace the damaged and failed ones in time. 4.6 During the
overhaul, all insulation layers in the device should be inspected, and those
damaged or disabled should be replaced in time.
By using the difference in the volatility of the components in the liquid
mixture, the liquid mixture is partially vaporized and the vapor is partially
condensed, so as to achieve the separation of the components it contains. It is
a unit operation that belongs to mass transfer separation. Widely used in oil
refining, chemical, light industry and other fields.
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