Film scratching type rotary micro-channel enhanced extraction equipment and application thereof

Abstract

The invention provides film scratching type rotary micro-channel enhanced extraction equipment and application thereof. The extraction equipment comprises an inner barrel and an outer barrel which sleeves the outer part of the inner barrel, wherein a gap between the inner barrel and the outer barrel is 0.15 to 0.35mm; a plurality of vertical strips are engraved on an inner wall of the inner barrel; the top of the inner barrel is connected with a rotary shaft; the rotary shaft is connected with a motor; and the outer barrel is provided with an upper feeding opening, a lower feeding opening anda discharging opening. The equipment is applied to an enhancement method of solvent extraction; the enhancement method comprises the following steps: conveying a solution to be extracted and an extracting agent into the gap between the inner barrel and the outer barrel through the upper feeding opening and the lower feeding opening respectively under the pushing of an injection pump at the same time; and after the gap between the inner barrel and the outer barrel is fully filled with liquid, a motor is started and the inner barrel is rotated, so that a two-phase flow is formed in the gap and the two-phase flow is discharged from the discharging opening through movement. By adopting the film scratching type rotary micro-channel enhanced extraction equipment, the time that extraction is balanced can be greatly shortened and the extraction energy consumption is reduced.

Description

Technical field

[0001] The invention relates to an enhanced extraction device, in particular to a scraped film type rotating microchannel enhanced extraction device and its application. Background technique

[0002] Extraction is a unit operation in which the solute is purified or concentrated by the difference in the partition coefficient between the two immiscible phases. Because the appropriate extraction agent and process can be selected according to the separation object and requirements, it has the characteristics of high selectivity, good separation effect and strong adaptability. In recent years, the enhancement of the extraction process has received extensive attention. Among them, the development of emulsification extraction technology and microchannel extraction technology is the most significant. The enhancement of the extraction process has significant advantages in improving the extraction process, increasing the contact area of ​​the two phases, increasing the ex...

Examples

Embodiment 1

[0035] In this embodiment, the above-mentioned scraped-film rotating microchannel enhanced extraction equipment is used to extract and purify the chromium solution containing 200 ppm of chromium. Extractant and process parameters during extraction: The extractant is prepared from ethylhexyl phosphate mono-2-ethylhexyl ester (P507) and kerosene in a volume ratio of 3:7, and the volume ratio of chromium solution to extractant is 1: 1. The extraction temperature is 25℃, the rotation speed of the inner cylinder is 500r / min, and the extraction time is 15s, 30s, 45s, 60s, 90s, 120s.

[0036] The extraction operation is as follows: preheat the purified chromium solution and extractant to 25°C respectively, and then send the preheated purified chromium solution and extractant through the syringe pump from the upper feed port 5 and the lower feed port 2 respectively In the gap between the inner cylinder 3 and the outer cylinder 4, when the liquid fills the gap, the drive motor 7 is turned...

Technical field

[0001] The invention relates to an enhanced extraction device, in particular to a scraped film type rotating microchannel enhanced extraction device and its application. Background technique

[0002] Extraction is a unit operation in which the solute is purified or concentrated by the difference in the partition coefficient between the two immiscible phases. Because the appropriate extraction agent and process can be selected according to the separation object and requirements, it has the characteristics of high selectivity, good separation effect and strong adaptability. In recent years, the enhancement of the extraction process has received extensive attention. Among them, the development of emulsification extraction technology and microchannel extraction technology is the most significant. The enhancement of the extraction process has significant advantages in improving the extraction process, increasing the contact area of ​​the two phases, increasing the ex...

Examples

Embodiment 1

[0035] In this embodiment, the above-mentioned scraped-film rotating microchannel enhanced extraction equipment is used to extract and purify the chromium solution containing 200 ppm of chromium. Extractant and process parameters during extraction: The extractant is prepared from ethylhexyl phosphate mono-2-ethylhexyl ester (P507) and kerosene in a volume ratio of 3:7, and the volume ratio of chromium solution to extractant is 1: 1. The extraction temperature is 25℃, the rotation speed of the inner cylinder is 500r / min, and the extraction time is 15s, 30s, 45s, 60s, 90s, 120s.

[0036] The extraction operation is as follows: preheat the purified chromium solution and extractant to 25°C respectively, and then send the preheated purified chromium solution and extractant through the syringe pump from the upper feed port 5 and the lower feed port 2 respectively In the gap between the inner cylinder 3 and the outer cylinder 4, when the liquid fills the gap, the drive motor 7 is turned...

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