Plant essence gradient extraction device

Abstract

The invention provides a plant essence gradient extraction device, which comprises an evaporator with a built-in raw material bed layer, an exhaust pump, a gas condensing device, a circulating gas heating device and a product collecting tank, wherein the gas condensing device and the circulating gas heating device are formed by coupling a semiconductor cooling device; the cold side of the semiconductor cooling device serves as a gas condensing device and the hot side of the semiconductor cooling device serves as a circulating gas heating device; and the semiconductor cooling device is formed by connecting N stages of semiconductor cooling units in series; return crossing lines with valves are arranged at the cold side material outlet openings of the semiconductor cooling units from the 1st stage to the N-1th stage and are connected to the hot side material outlet openings of the semiconductor cooling units to regulate the temperature difference between the cold sides and the hot sidesof the semiconductor cooling units. Based on the requirements of the gradient extraction of the distillates of the plant essence, the device can provide cold energy and heat energy according to the required cooling and heating temperature, so that the device has high energy efficiency, is reasonable in energy utilization and low in cost.

Description

technical field [0001] The invention relates to a device for extracting active ingredients from plants. Specifically, it uses gas heating, condensation and circulation to extract plant essential oil in stages. Background technique [0002] Plant essential oils, also known as aromatic oils and volatile oils, are important natural spices. In the extraction of plant essential oils, the methods commonly used include distillation, extraction, pressing, leaching, adsorption, etc., among which steam distillation is the most common, and this method often produces components due to hydrolysis, thermal decomposition or other side reactions. Undesirable impurities or damage to effective components, and higher energy consumption. The extraction of plant essential oils by organic solvent extraction not only consumes solvent, but also the extraction solvent may bring impurities into the product. At the same time, equipment for solvent recovery is required, and the device is relatively c...

AI Technical Summary

Problems solved by technology

Using organic solvent extraction to extract plant essential oils not only consumes solvent, but also the extraction solvent may bring impurities into the product, and also requires equipment for solvent recovery. The device is relatively complicated, which increases the cost of the product

Carbon dioxide supercritical extraction method, the extraction effect is good, but the equipment and operating costs are high

More importantly, the increase in temperature on the hot side will cause a substantial increase in the gas-phase pressure of the hot-side refrigerant, exceeding the pressure that the equipment can withstand, and overloading the refrigerant compressor

Therefore, the temperature of the cold side and the hot side of the conventional refrigeration unit used in this device is difficult to effectively track the raw material heating temperature and gas condensation temperature adjustment actually required by the gradient extraction process in a wide range, resulting in unreasonable energy utilization and increased costs.

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