An intrinsically safe centrifugal extraction method for explosive solvent system with nitrogen filling and oxygen measurement
An intrinsically safe, centrifugal extractor technology, used in liquid solution solvent extraction, material electrochemical variables, etc., can solve problems such as heat generation, limited extraction agent selection, centrifugal extractor application, static electricity, etc.
Active Publication Date: 2021-08-31
HEFEI GENERAL MACHINERY RES INST
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Problems solved by technology
[0004] The extraction agent has the following risk factors in the centrifugal extractor: 1. In the high-speed centrifugal force field, heat and static electricity caused by friction between the material and the rotating parts; 2. Internal friction and sparks generated by the equipment under abnormal conditions; 3. Organic Gas accumulation from solvent volatilization
These potential safety hazards greatly limit the selection of extraction agents and the application of centrifugal extractors
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[0033] The present invention will be described in detail below in conjunction with specific embodiments.
[0034] An intrinsically safe centrifugal extraction system for an explosive solvent system with nitrogen filling and oxygen measurement, comprising a centrifugal extraction unit 10 for liquid-liquid extraction and separation, the centrifugal extraction unit 10 includes one or more centrifugal extraction machines 101 connected in series, the The centrifugal extraction system also includes filling nitrogen into the centrifugal extractor 101 to replace the internal air, so that the oxygen content in the centrifugal extractor remains within a preset safe range, and a nitrogen filling unit 20 for detecting oxygen in the centrifugal extractor 101. The oxygen measuring unit 30 of the specific value of the content, the centrifugal extractor 101 is respectively connected with the nitrogen filling unit 20 and the oxygen measuring unit 30;
[0035] The centrifugal extraction system ...
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The invention belongs to the technical field of centrifugal extraction, and in particular relates to an intrinsically safe centrifugal extraction method for explosive solvent systems using nitrogen filling to measure oxygen, which specifically includes the following steps: S1. Introduce nitrogen into the centrifugal extractor through a nitrogen filling unit, and replace the centrifugal The air inside the extractor controls the oxygen content inside the centrifugal extractor within the preset safety range; S2, transports the extractant and the solute to be extracted to the inside of the centrifugal extractor for mixed mass transfer; S3, passes the test The oxygen device detects the oxygen content inside the centrifugal extractor during the mixed mass transfer process and converts it into an electrical signal and sends it to the signal processing unit; S4, judges the oxygen content inside the centrifugal extractor through the signal processing unit, when the oxygen content is greater than the preset When the maximum value of the safe range is reached, the nitrogen filling unit is started to fill the centrifugal extractor with nitrogen until the oxygen content is within the preset safe range. It greatly improves the safety and stability of the centrifugal extraction process when using flammable and explosive solvents.
Description
technical field [0001] The invention belongs to the technical field of centrifugal extraction, and in particular relates to an intrinsically safe centrifugal extraction method for an explosive solvent system by filling nitrogen and measuring oxygen. Background technique [0002] Centrifugal extractor is a fast and efficient liquid-liquid extraction and separation equipment. The principle is to use the centrifugal force generated by the centrifugal extractor during high-speed rotation to mix and transfer the two-phase liquids with different densities and immiscibles, and finally separate them to achieve the purpose of extraction. Two phases that are immiscible with each other, one of which is generally an aqueous phase, which contains the components to be extracted, is called a solute; the other phase is generally an organic solvent, called an extractant. After the two phases enter the extractor, mass transfer occurs first, and the solute enters the extractant; then separati...
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IPC IPC(8): G01N27/26B01D11/04
CPCB01D11/04G01N27/26
Inventor 张德友陈崔龙陈道林丁建国
Owner HEFEI GENERAL MACHINERY RES INST