Airflow leaching novel technique and equipment thereof

Abstract

The present invention discloses an air-stream extraction new process and a device thereof; the new process comprises the steps that a selected solvent is primarily measure and stored in a given stuff-solvent ratio; the solvent is then heated, so that the solvent can be evaporated into air stream at a specified evaporation speed; the solvent air stream is guided into a solid raw material at a normal temperature, so that the solvent air stream is adequately contacted and mixed wit the solid raw material, and the temperature of the solvent air stream decreases, and the solvent air stream is condensed into liquid drops, and the active ingredients are dissolved out to form a mixing solution of the solvent agent and the active ingredients; then the solid substance is separated from the mixing solution containing the active ingredients; and the active ingredients in the solvent mixing solution is extracted, and the solvent is recycled. The device is mainly composed of an upper stream chamber, a material storage chamber, a discharging port, an evaporation chamber, a mixed oil outlet, a solvent inlet, a false bottom, a mixer, a reversed-flow port and a feeding port. The air-stream extraction new process and the device thereof has the advantages such as low energy consumption, high efficiency, simple device, great processing ability, environmental protection, wide application, etc.

Description

technical field [0001] The invention relates to an extraction and separation technology, in particular to a new airflow leaching process and equipment thereof. Background technique [0002] Extraction is a chemical separation process with a long history and a very broad application field. It is customary to use a solvent to separate the components in the liquid phase as liquid-liquid extraction, also known as solvent extraction. The use of solvents to separate the components in the solid phase is called solid-liquid extraction, also known as solvent leaching (extraction). The chemical unit has the characteristics of high separation efficiency, large processing capacity, and low energy consumption (generally operated at normal temperature and pressure). It has been widely used in petroleum, petrochemical, hydrometallurgy, rare earth extraction and purification, nuclear fuel extraction and irradiated nuclear fuel reprocessing, chemical, pharmaceutical, biochemical, food and ...

AI Technical Summary

Problems solved by technology

However, the conventional solid-liquid phase extraction method has long-standing limitations in separation, and it is still unable to solve it perfectly.

If the powder degree of the solid substance is too large, the water content is too high (especially when using a hydrophilic solvent), and the content of the components to be separated in the solid phase is too high, it is more difficult to adopt the traditional solid-liquid phase extraction separation technology.

However, some enterprises urgently need to apply solid-liquid phase extraction technology in production, so they can only increase auxiliary processes in actual production, try to change the properties of solid substances, and make them partially meet production needs

This will inevitably increase equipment investment, energy consumption, and production costs, and will also have a more or less adverse effect on product quality. In particular, it is more difficult to require the separated natural components to be less damaged and lost.

Although the advent of supercritical extraction separation technology and its gradual industrialization can partially overcome the above-mentioned limitations, it cannot fundamentally solve the above-mentioned difficulties

What's more, the high investment and high production cost of this technology are difficult to apply to products with low added value.

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