Device for preparing sea dog oil and preparation method thereof
A technology of seal oil and equipment, which is applied in the field of equipment and preparation of seal oil, can solve the problems of reduced safety, complicated steps, inferiority, etc., and achieve the effects of shortened service life, improved product purity, and broad development prospects
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Embodiment 1
[0026] Molecular distillation of seal oil is carried out by applying improved wiped film molecular distillation equipment, including the following steps:
[0027] 1) Distillation under reduced pressure: seal oil is sent in the column through feed pump 2 with the feed rate of 5.0kg / h at feed inlet in vacuum distillation column 3 ' middle part by raw material tank 1. The light components at the top of the column are extracted by the discharge pump 6 through the condenser 5, and the heavy components at the bottom of the column are transported to the feed port of the primary molecular distillation by the discharge pump 8. The vacuum system of the vacuum distillation column consists of a cold trap 4 and a rotary vane mechanical vacuum pump 7 . The operating pressure at the top of the column is 10 Pa, and the operating temperature at the bottom of the column is 150°C. The light components in the seal oil are removed from the top of the column, and the heavy components containing EP...
Embodiment 2
[0031] Basic technology is with embodiment 1, and concrete operation parameter is as follows:
[0032] 1) Distillation under reduced pressure: seal oil is sent in the column through feed pump 2 with the feed rate of 20.0kg / h at feed port in vacuum distillation column 3 ' middle part by raw material tank 1. The operating pressure at the top of the column is 1 Pa, and the operating temperature at the bottom of the column is 140°C. The light components in the seal oil are removed from the top of the column, and the heavy components containing EPA, DHA and DPA are initially concentrated at the bottom of the column;
[0033] 2) Primary molecular distillation: Send the bottom fraction of the previous step to the primary molecular still at a corresponding speed, and perform primary molecular distillation under the conditions of 220°C, system pressure 0.1Pa, and wiped film rotor speed 250rpm, and collect heavy components;
[0034] 3) Secondary molecular distillation: send the heavy ...
Embodiment 3
[0036] Basic technology is with embodiment 1, and concrete operation parameter is as follows:
[0037]1) Distillation under reduced pressure: seal oil is sent in the column through feed pump 2 with the feed rate of 10.0kg / h in vacuum distillation column 3 ' central feed port by raw material tank 1. The operating pressure at the top of the column is 5Pa, and the operating temperature at the bottom of the column is 100°C. The light components in the seal oil are removed from the top of the column, and the heavy components containing EPA, DHA and DPA are initially concentrated at the bottom of the column;
[0038] 2) Primary molecular distillation: send the bottom fraction of the previous step to the primary molecular still at a corresponding speed, and perform primary molecular distillation under the conditions of 200°C, system pressure 0.5Pa, and wiped film rotor speed 200rpm, and collect Heavy components;
[0039] 3) Secondary molecular distillation: Send the heavy component...
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