A waste
triethylene glycol purification and recycling device relates to the technical field of
triethylene glycol purification devices and comprises a
triethylene glycol vacuum evaporation tank, a primary condenser, a secondary condenser, a condensation
storage tank, a gas-liquid separation tank and a
vacuum pump, a steam outlet pipeline A is arranged at the upper end of the triethylene glycol
vacuum evaporation tank and communicated with an inlet of the primary condenser, and a steam outlet pipeline B is arranged at the lower end of the steam outlet pipeline A; triethylene glycol steam is condensed into liquid through the first-stage condenser, an outlet of the first-stage condenser is communicated with the condensation
storage tank, a steam outlet pipeline B is arranged on the upper portion of the condensation
storage tank and communicated with an inlet of the second-stage condenser, and gaseous triethylene glycol steam is condensed into liquid through the second-stage condenser. An outlet of the secondary condenser is communicated with a gas-liquid separation tank; the upper part of the gas-liquid separation tank is communicated with a
vacuum pump; the vacuum degree of the triethylene glycol
vacuum evaporation tank is 4KPa, and under the vacuum degree, the
boiling point of triethylene glycol is lower than 200 DEG C and lower than the theoretical
decomposition temperature of 208 DEG C, so that purer triethylene glycol can be obtained and reaches the recycling standard.