Reduced-pressure distiller with high-position feeding and low-position collecting functions

Abstract

The invention relates to the filed of reduced-pressure distillation of organic materials such as used lubricant oil, in particular to a reduced-pressure distiller with high-position feeding and low-position collecting functions. The reduced-pressure distiller comprises an evaporator shell, a feed liquid heating mechanism consisting of a feed liquid input pipeline, a feed liquid delivery pump and a heater, and a distillate cooling and collecting reduced-pressure mechanism consisting of a condenser, a distillate collecting pipeline, a distillate collecting tank and a vacuum pump; an annular feed liquid interlayer channel formed by an interlayer wall and the side wall of the evaporator shell is installed in a sealed evaporating cavity which is arranged at the middle upper part in the evaporator shell; the upper end of the annular feed liquid interlayer channel is communicated with the sealed evaporating cavity in an opening manner; the side end of the annular feed liquid interlayer channel is communicated with a heated feed liquid outlet arranged at the upper end of the heater through a feed pipe extended from the side wall of the evaporator shell; a diversion trench is installed below the annular feed liquid interlayer channel; and the bottom of the diversion trench is connected with a diversion pipe and is communicated with the distillate cooling and collecting reduced-pressure mechanism through the diversion pipe. The reduced-pressure distiller provided by the invention can restrain pyrolysis degree of heated feed liquid so as to reduce heating energy loss and improve work efficiency.

Description

technical field [0001] The invention relates to the field of vacuum distillation of organic materials such as waste lubricating oil, in particular to a vacuum distiller for high-level feed and low-level collection. Background technique [0002] Vacuum distillation is a distillation method that reduces the energy saving of the boiling point of the feed liquid and suppresses the pyrolysis of the distillation feed liquid by reducing the pressure. The degree and production efficiency are currently the focus of attention of those skilled in the distillation field. [0003] Known vacuum distillation units are generally Figure 4 The structure shown, its working principle is briefly described as follows: [0004] Feed liquid (material to be purified by distillation) 4 is injected into the evaporator shell 1 placed on the evaporator support 2 through the feed valve 10 and the feed pipeline 9, and the injection volume accounts for about the volume of the evaporator shell 1 about on...

AI Technical Summary

Problems solved by technology

The disadvantages of this device are: due to its high compactness, high precision and miniaturization, it is difficult to achieve a long-term high-yield processing mode, it is not suitable for processing high boiling point, high heat sensitivity requirements, more impurities and low processing added value Otherwise: because the radial distance between the outer tube wall of the condenser tube and the inner wall of the cylinder is only 3.6cm ~ 4.2cm, there are upper and lower flanges, The rotating cage device composed of columns and scraper strips makes it very easy for the liquid droplets to splash from the inner wall of the cylinder to the outer tube wall of the condenser tube during feeding and rotating work, thereby forming a short-circuit evaporation (not vaporized and collected by the distillate collection system); because the inner wall of the jacket cylinder is both a heat release surface and an evaporation surface, it is bound to be absorbed by the generated solid phase within a short working time The compact and precise space of the device is polluted and destroyed, so that the device enters a longer maintenance cycle in a shorter working time

Due to the miniaturization of the device, the processing efficiency of the device is bound to be low

Due to the complex structure of the device, the manufacturing cost and maintenance cost of the device will inevitably be too high

[0014] To sum up, due to the long maintenance cycle of the device, the production cycle of the device is bound to be shortened, coupled with factors such as low processing efficiency, which will eventually lead to high processing costs and it is difficult to reflect the economic benefits of liquid material processing

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