Mixed settler extractor

A technology of mixing clarification and extraction tank, which is applied in the direction of liquid solution solvent extraction, etc., can solve the problems of slow two-phase delamination, poor two-phase mixing effect, and reduced processing capacity of the extraction tank, so as to achieve good results and eliminate environmental pollution.

Inactive Publication Date: 2008-07-16
GRIREM ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The above-mentioned extraction tank is only suitable for the extraction system with little difference in the two-phase flow ratio. For the extraction system with the flow ratio greater than 10, the two-phase mixing effect is poor, and the efficiency of the extraction tank level is low; in addition, the temperature in the extraction workshop is low in winter, and the temperature in the extraction tank decrease, resulting in an increase in the viscosity of the organic phase, slow separation of the two phases, and a decrease in the processing capacity of the extraction tank

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031]The extraction tank is prepared by PVC welding, and the 6-stage mixing and clarifying tank (on the same side as the mixing chamber) is combined into an extraction box as attached figure 2 . The effective size of the mixing chamber of the extraction tank is 1100mm×1100mm×1300mm; the clarification chamber is 2600mm×1100mm×1300mm. There is a φ30mm return pipe at the bottom of the clarification chamber to communicate with the mixing chamber.

[0032] The extraction box is used for back-extraction of the rare earth-containing organic phase. The organic extractant: 1.5mol / l P204 (kerosene dilution) flows into the first-stage mixing chamber at a rate of 250 liters / minute, and the back-extraction acid flows continuously into the sixth stage after metering. In the mixing chamber, the flow rate is 25 liters / minute, the two-phase flow ratio (O / A) is 10:1, the two-phase mixing ratio (O / A) in the mixing chamber is 2:1, and the temperature in the extraction tank is stable at 25°C. ...

Embodiment 2

[0034] The extraction tank is made of glass fiber reinforced plastic, and the 8-stage mixing and clarifying tanks are arranged in a staggered manner to form an extraction box. image 3 . The effective size of the mixing chamber of the extraction tank is 800mm×800mm×1000mm; the clarification chamber is 2000mm×800mm×1000mm. The mixing chamber is equipped with 2 baffles, and two rows of φ30mm holes with a spacing of 100mm are arranged at each longitudinal end.

[0035] The extraction box is used for the extraction section of neodymium and samarium grouping of rare earth sulfuric acid solution. The rare earth sulfuric acid solution (33g / l) is continuously introduced into the 8th stage of the extraction box through a flowmeter, with a flow rate of 120 liters / min. Organic extractant: 1.0mol / l P204 (kerosene Dilution) flows into the first-stage mixing chamber at a speed of 40 liters / minute, the temperature in the extraction tank is 18° C., the mixed phase in the mixing chamber is a ...

Embodiment 3

[0037] The extraction tank is prepared by welding 5mm stainless steel plate, the 20-stage mixing and clarification tank, and the 10-stage arrangement are combined into an extraction box as attached Figure 4 . The effective size of the mixing chamber of the extraction tank is 800mm×800mm×1000mm; the clarification chamber is 2000mm×800mm×1000mm. The bottom of the clarification chamber is equipped with a φ25mm return pipe to communicate with the mixing chamber, and the inner wall of the clarification chamber is equipped with a φ20mm stainless steel steam pipe for heating. The insulation layer is wrapped around the extraction box, and the upper part of the mixing chamber is equipped with a water-sealed cover.

[0038] The extraction box is used for solvent extraction of alkaline system, the flow ratio (O / A) of the organic phase and the aqueous phase is 35, the two-phase mixing ratio (O / A) of the mixing chamber is 3:1, and the temperature inside the box is 93°C. The temperature e...

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Abstract

The invention relates to a mixer settle extraction tank that is applicable to the extraction of high flow rate solvent, in particular to an extraction case combined by single-stage mixer settle extraction tanks. A two-phase mixer is stirred and driven by a turbine and the stirring has a pumping effect for two-phase fluid. Two phases are induced to a place below a stirring axial center by a diversion tube in a mixing chamber. The mixed phases are layered in a settling chamber, wherein, a light phase flows into a light phase box and enters a next stage mixing chamber through the diversion tube and a heavy phase gets across an overflow plate of a heavy phase box and enters a former stage mixing chamber and the two phases form an adverse current mode in a cascade stage device. The settling chamber is provided with a return line to be communicated with the mixing chamber to guarantee that the mixing phase ratio of the two phases in the mixing chamber is less than 4 when the flow rate of the two phases is high. A heat protection layer is coated around the extraction case, a cover board is arranged at the upper part and temperature in the tank body is constant. Water sealing is used at the top part of the mixing chamber of the extraction tank, thus organic gas evaporated from the extraction tank can be recovered.

Description

technical field [0001] The invention relates to a mixing and clarifying extraction tank suitable for solvent extraction with large flow ratio. Specifically, the single-stage mixing and clarifying extraction tanks are combined into an extraction tank; the two-phase mixing is driven by turbine agitation, and the agitation also has the function of pumping two-phase fluids; the two phases are guided to the center of the agitation axis by a draft tube in the mixing chamber Below: the mixed phase is stratified in the clarification chamber, the organic phase flows into the light phase box and enters the rear mixing chamber through the diversion tube, the water phase crosses the overflow plate of the water phase box and enters the previous mixing chamber, and the two phases are in the cascade equipment In the countercurrent mode; set a return pipe in the clarification chamber to the mixing chamber, so that when the two-phase flow ratio is 10-60, ensure that the mixing ratio of the two...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D11/04
Inventor 彭新林黄小卫李红卫龙志奇崔大立张顺利
Owner GRIREM ADVANCED MATERIALS CO LTD
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