The extraction of Chinese medicine has water extraction, alcoholic sedimentation, organic solvent extraction. The organic solvent extraction has liquid-liquid extraction, liquid-solid extraction. In ancient times in China, Chinese herbal medicine has water decoction, wine maceration extraction of herbs. In modern times, new extraction methods include: semi-antibiotic extraction, ultrasonic extraction, supercritical fluid extraction, cyclone extraction, microwave extraction, pressurised counter-current extraction, enzymatic extraction, etc. Chinese medicine leaching process equipment also has a single-stage leaching process equipment, multi-stage leaching process equipment, continuous counter-current leaching process equipment. The following is to talk about the single-stage leaching process equipment a - multifunctional extraction tank.

Multi-functional extraction tank is generally extracted by water and alcohol extraction solvent. Multi-functional extraction tank for the extraction of volatile oil, recovery of solvent in the dregs; for decoction percolation, reflux, warm leaching, circular maceration, pressurised or depressurised leaching and other processes. The multi-functional extraction tank is called multi-functional extraction tank because of its wide range of uses.

The multi-functional extraction tank is made of stainless steel, which is resistant to corrosion and high temperature; the extraction time for Chinese medicine is short and the production efficiency is high; the consumption of heat is low and energy is saved; the automatic slag discharge by air pressure is convenient. Multi-functional extraction tank is also divided into vacuum extraction tank, atmospheric pressure extraction tank, pressurised extraction tank, etc.

From the shape characteristics are tumbling multifunctional extraction tank, straight multifunctional extraction tank and micro inverted cone multifunctional extraction tank. Among them, the straight simple multi-functional extraction tank occupies less space but requires high space, the static pressure inside the tank is high, the application is similar to the cone extraction tank, but more for percolation, counter-current extraction and alcohol extraction, medicinal wine, etc. The advantage of the micro inverted cone type multifunctional extraction tank is its lower structure, so that - some difficult to automatically slag out of the herbs after the slag i ] open all discharge fall, so shorten the slag out time.