*Correspondence:
This article was submitted to Frontiers in Ethnopharmacology, a specialty of Frontiers in Pharmacology.
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China is the birthplace of the Chinese Medicine.
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Extract gets through filters to reach the tubular heat exchanger tube by the effect of gas–liquid mixing pump, and the heat transfer oil driven to reach out at high-temperature under the leading by hot oil circulation pump, the hot and cold liquids in a tubular complete heat exchange in heat exchanger, the heating of the extract re-pump back to the extraction tank, the process is cyclical, exist in the whole extraction process (Wang et al.,
Traditional extraction methods use more heating jacket, it sets jacket in the extraction tank wall, which leads to heat conduction through the partitions to complete the process of heat transfer. Schematic can be seen in the outer layer of the insulating layer, middle layer is heated, the internal is the extract, this time, the heat is always around the material, transfer from the outside to inside slowly, the temperature of the bottom, middle material is too low, the effect of heat transfer is limited, not be extracted completely (Liu and Zhao,
Innovative technology of
It can be seen on the schematic of the device, it is mainly made of the tubular heat exchanger, heat generating devices, high-temperature oil circulating pump, filtration system, and the corresponding piping components. The outside of tubular heat exchanger is cylindrical, with a number of controls inside, the fluid inside pipe is extract fluid (yellow); outside fluid is heat (red). Hot and cold fluids flow respectively in the opposite direction, relies on their high-temperature circulation pump, so the heat can be exchanged. The dynamic cyclic heating only heat flows through the shell, so the heat transfer will be more efficient (Lixi et al.,
Traditional extraction techniques heating device is heat-conducting oil or steam boiler heat generated with a single heat source. The extraction of this item selected carbon steel as the material within the bundle of heat exchanger, the shell and road of tube have been handled by pressure-proof, so it could work normal at high-temperature and high-pressure. The use of heat generating device can be HTF or steam generator (Table
Extraction | Heating | Extraction method | Technical features |
---|---|---|---|
The traditional extraction technology | Jacketed type | Immersion type | Heat transfer surface is limited by the wall of extracting tank, the coefficient of heat transfer is small, the heat source is always around with the material, heat is difficult to transfer to inside, it is easy to form the heating dead ends, and make the temperature of material at the bottom and middle too low, the effect of heat transfer is limited, and easy to cause the extraction incomplete |
The innovation extraction technology of |
Tubular type | Circulation type | Tubular type heat in the external, heat transfer surface is not limited by the wall of extracting tank, liquid feeding pipes are arranged in a honeycomb shape, heat transfer area increased, without the heating dead ends, the heat exchange efficiency is improved, the heating time is shorten, and extraction is Completely |
The traditional methods use more on maceration extraction method, it is static extraction, materials, and solvents are in a relatively quiescent state, the material heated area is limited and uneven, solvent flow is not strong, they affected the material leaching component diffusion.
In the extraction process of Chinese herbal medicines, edible and medicinal fungi, if the liquid is always maintained good liquidity, resulting in a good concentration difference, it will greatly accelerate the leaching of the active ingredient from extract. So the new technology to extract
Leachate get through the high-temperature-proof gas–liquid mixture circulating pump to the bottom of the tank, filtered, heated, and then pump back leaching to the top of tank, then sprayed, and washed by high-pressure nozzle. Force circular operation until the extraction completed. It makes full access to the material to be extracted with solvents, and complete (Table
Traditional extraction techniques put in materials from the top, and take out the waste from the bottom, mostly are cone-shaped structure. In the actual production, due to the small size of the device's bottom, the material can easily plugged here, difficult to be flushed off (Table
This extraction technology device to extract the structure using the straight-shaped structure, two-cylinder hydraulic drive top open structure, it will place materials in the transparent stainless steel basket, and then taken to the extract tank by mechanical, all the process for transporting the materials are finished by mechanism, thus it avoids the waste plugged at bottom (Table
Innovation research on
Reduce energy consumption
To extracting 100 kg
Improve the extraction yield
To extracting 100 kg
Shorten the extraction time
An installed capacity of 200 kW as an example, the traditional technology needs 10 h, this technology only need 6 h, the desired time can be reduced by about 40%.
Solvent saving
An installed capacity of 200 kW as an example, the traditional technology needs the ratio of the material and liquid is 1:15; this technology is 1:10. Compared with the traditional technology, solution volume reduces about 33%.
These figures show that innovative technology of
The extraction and processing of