Resource-utilization fine fractionation technology for organic heat carrier

Abstract

The invention discloses a resource-utilization fine fractionation technology for an organic heat carrier, and belongs to the field of application of organic heat carriers. The technology comprises a high-boiling-point composition separation technology and a low-boiling-point composition separation technology, and is characterized in that when high-boiling-point compositions are separated, a liquid mixture successively enters a dewatering tank, a falling-film distillation tower, a fractionation tower, a molecule distillation evaporator, a reduced-pressure flash evaporation tower, a reduced-pressure distillation tower and an oil storage tank; and when low-boiling-point compositions are separated, the liquid mixture firstly enters a dewatering tank, then enters a falling-film evaporator for separation, and finally is conveyed to an oil storage tank. The technology has the characteristics of low operation pressure, high separation ratio, low energy consumption, cleanness, environment friendliness and the like. The technology is capable of conveniently dividing to-be recovered heat transfer oil into white-oil heat transfer oil, lubricating oil, heavy oil fuel and other compositions according to the difference of evaporation temperature, has the characteristics of environment friendliness, ideal compositions and high efficiency, helps to improve economic benefit and environment-protection benefit, and has extremely high application value.

Description

technical field [0001] The invention relates to a process method for resource utilization of an organic heat carrier by fine fractionation, and belongs to the field of organic heat carrier applications. Background technique [0002] The traditional waste oil recovery method is to adjust the pH value of the waste oil with acid and alkali chemical treatment according to the acid value. After washing with water, add activated carbon or white clay to absorb, filter, and dry, and then collect the waste oil in a certain temperature range through vacuum fractionation. Distillate, for the purpose of recovery. This recovery method has a long operation process and needs to go through multiple washing processes, and will produce discharge of acid-base neutralized salt, decolorizer and white dregs, which has great environmental pollution. And because the boiling point of heat transfer oil is high, the rectification method consumes a lot of energy and the product yield is low. [0003]...

AI Technical Summary

Problems solved by technology

This recovery method has a long operation process and needs to go through multiple washing processes, and will produce discharge of acid-base neutralized salt, decolorizer and white dregs, which has great environmental pollution.

Moreover, due to the high boiling point of the heat transfer oil, the rectification method consumes a lot of energy and the product yield is low

[0003] In addition, due to the large differences in the indicators of different types of heat transfer oils, and the sources of waste heat transfer oils are different, the use of the above recycling methods may also cause unstable product quality