Low-boiling-point ester and glycerol separation device for biodiesel distillation process

Abstract

The invention discloses a low-boiling-point ester and glycerol separation device for a biodiesel distillation process. The low-boiling-point ester and glycerol separation device comprises a vertical cooler, a glycerol separator, a glycerol barrel and a connecting pipeline. The top of the vertical cooler is provided with a low-boiling-point ester outlet pipe, a low-boiling-point ester inlet pipe, acooling water inlet and outlet and a glycerol outlet; the lower low-boiling-point ester inlet barrel is lengthened so that the separation time is prolonged, glycerin precipitation is facilitated andthe glycerin content of the upper low-boiling-point ester is reduced; a middle partition plate and a heating coil are arranged at the middle upper part in the glycerol separator, and the middle partition plate enables materials to flow in a U shape in the separator so that separation of glycerol and low-boiling-point ester is facilitated; the low-boiling-point ester outlet pipe is arranged at theside upper part of the glycerol separator on one side of the middle partition plate, and the glycerol inlet pipe is arranged at the top of the separator on the other side; and the glycerol outlet pipeis arranged below the glycerol separator. The low-boiling-point ester and glycerol separation device has the characteristics of low investment, convenience in operation, stable product quality, energy conservation and good mutual separation effect of low-boiling-point ester and glycerol.

Description

technical field [0001] The invention relates to a biodiesel production device, in particular to a biodiesel distillation process low boiling ester and glycerin separation device. Background technique [0002] Biodiesel production generally uses waste oil as raw material. Since free fatty acid and oil in waste oil coexist and contain many impurities, it is necessary to purify and remove impurities, and then produce crude fatty acid methyl ester through two-step chemical methods of esterification and transesterification , the crude methyl ester enters the falling film flash dehydration and methanol and other low boilers, and then heats the crude methyl ester to 250°C with heat transfer oil, and then enters the biodiesel distillation tower. Under negative pressure -0.05MPa, the biological Diesel products. Since the crude methyl ester contains C 16 (Carbon 16) low boiling matter esters and glycerin, when these low boiling matter esters and glycerol enter the high temperature v...

AI Technical Summary

Problems solved by technology

In the prior art, the biodiesel low-boiling ester and glycerin separation device generally adopts the structure of a horizontal cooler and a glycerin separation receiving tank. The problem is that the horizontal cooler has a poor separation effect on the glycerol in the low-boiling ester, which makes the low-boiling ester The product contains too much glycerin, resulting in unqualified quality, and the separated glycerin contains a lot of low boiling esters, which is not conducive to the production of crude glycerin

Images