Countercurrent extraction

1. Product use
The continuous counter-current extraction unit developed by Quanpin Machinery combined with international advanced technology is used for the efficient extraction of effective ingredients from natural plants (medicine). According to the characteristics of the extracted materials, we design various counter-current extraction units with different structures to meet the needs of production , Whether it is water extraction or organic solvent extraction, we will provide a professional overall solution.
 
Extraction of natural products such as various animals and plants:
1) Plant extracts: Ginkgo biloba, yew, knotweed, kudzu root, andrographis, licorice, locust flower, turmeric, grape skin, star anise, ginseng, lime, etc.
2) Natural sweeteners: Luo Han Guo, Stevia, etc.
3) Beverage health products, spices: tea, gynostemma pentaphylla, chrysanthemum, honeysuckle, etc.
4) Natural pigments: turmeric, safflower yellow, monascus red, isatis root, chlorophyll, etc.
5) Tobacco: cut tobacco, tobacco dust, tobacco stem
6) Health food: fish oil, shrimp oil, etc.
2. Structure and composition
The continuous countercurrent extraction unit realizes a complete set of mechatronics and is a fully automatic unit. The whole set is composed of feeding mechanism, solvent heat exchange device, extraction pipe section, liquid slag separator, slag digger, juice squeezing machine, etc. It can be supplemented with ultrasonic extraction as needed.
1. The automation system of the whole unit is a continuous process, controlled by an industrial computer, including the following:
Quantitative transportation and control of materials;
Extraction solvent flow and heat exchange temperature control;
Heating and constant temperature control during extraction;
CIP clean-in-place control;
2. Auxiliary mechanism of the whole set
Quantitative conveying device for materials;
Medicine residue treatment system: it is composed of medicine residue squeezer, dryer, organic solvent recovery condenser, storage tank, medicine residue conveyor, etc. as required;
Online flushing system;
3. Performance advantages:
Compared with traditional tank extraction, the advantages of this unit are continuous, high efficiency and energy saving.
1. Realize the entire process of closed and continuous production
The production efficiency has been significantly improved, and the unit production capacity has been increased.
The operation is simple, only two operators at most are required, which reduces labor intensity and saves production costs.
2. Realize extraction under countercurrent conditions
Reduce the amount of extraction solvent, which is 1/2-1/3 of the traditional extraction method, reduces the workload of subsequent filtration, separation, and concentration, saves energy consumption and reduces production costs.
The solvent is in full contact with the material, and the extraction yield is increased by 5%-20%.
3. Equipped with automatic discharge device of medicine slag
It solves the difficult problem of extracting the medicine slag from the extraction tank, and avoids manual cleaning and unsafe factors.
4. Supporting medicine residue squeeze dryer or solvent drying recovery system
After squeezing dry, the liquid content in the dregs is 50-70%, which improves the yield and reduces waste.
The squeezed medicine residue enters the dryer, the remaining solvent evaporates and enters the condenser for recycling, which reduces the waste of solvent, improves economic efficiency, and is beneficial to
Environmental protection.
5. The ultrasonic extraction technology can be fully utilized
The extraction time is significantly shortened, about 1/5-1/20 of conventional extraction;
The extraction temperature is reduced by 20-30°C, which is conducive to the extraction of heat-sensitive pharmaceutical ingredients, reduces the content of impurities, and reduces energy consumption.
The extraction yield is increased by 5%-30%.
6. Performance comparison table of ultrasonic countercurrent extraction machine and multifunctional extraction tank:

	Countercurrent extraction machine (ultrasonic)	Extraction tank
working principle	Continuous countercurrent extraction	Intermittent, stirring
Extract features	Keep the concentration difference between the material and the liquid, and the extraction is sufficient	The concentration difference between the material and liquid tends to zero, and the extraction power is not strong
Control method	Automated operation	Mainly manual operation
Extraction rate	90-97%	70-85%
Extraction residence time	50% less than extraction tank	Intermittent
Liquid-solid ratio	Around 8:1	Greater than 15:1
Material accumulation	No accumulation	accumulation

3. Structure and composition
The continuous countercurrent extraction unit realizes a complete set of mechatronics and is a fully automatic unit. The whole set is composed of feeding mechanism, solvent heat exchange device, extraction pipe section, liquid slag separator, slag digger, juice squeezing machine, etc. According to the different solvents, it can be divided into U-shaped extractor and pipeline type extractor, which can be supplemented by ultrasonic extraction according to the needs; the spiral propulsion structure built in the extraction pipe section can be designed as a single spiral stirring or double spiral stirring propeller according to different material characteristics ; The thermostatic jacket is made of high-quality SUS304 honeycomb board, the exterior is insulated with PU or glass wool, and the outer SUS304 stainless steel is used. The whole machine is sanitary and beautiful.
1. The automation system of the whole unit is a continuous process, controlled by an industrial computer, including the following:
Quantitative transportation and control of materials;
Extraction solvent flow and heat exchange temperature control;
Heating and constant temperature control during extraction;
CIP clean-in-place control;
2. Auxiliary mechanism of the whole set
Quantitative conveying device for materials;
Medicine residue treatment system: it is composed of medicine residue squeezer, dryer, organic solvent recovery condenser, storage tank, medicine residue conveyor, etc. as required;
Online flushing system;
 
4. Technical parameters:

Serial number	Model specification	Inner diameter of  extraction tube (mm)	Extraction pipe  section	Total length of extraction pipe section (m)	Total extraction  volume (L)	Extraction amount (kg/h)
1	NL/3/2	300	2	9	630	40～120
2	NL/3/3	300	3	13.5	945	60～180
3	NL/5/4	500	3	13.5	2640	170～500
4	NL/5/4	500	4	18	3500	220～680
5	NL/5/5	500	5	22.5	4360	280～850
6	NL/6/4	600	4	18	5080	320～970
7	NL/6/5	600	5	22.5	6350	400～1200
8	NL/6/6	600	6	27	7600	480～1500
9	NL/8/5	800	5	25	12500	720～2100
10	NL/8/6	800	6	30	15000	850～2700
11	NL/8/7	800	7	35	17200	1000～3000
12	NL/10/6	1000	5	30	22500	1300～4000
13	NL/10/7	1000	7	35	26000	1500～5000
14	NL/10/8	1000	8	40	3100	1800～5500
15	NL/12/7	1200	7	35	38500	2200～7000
16	NL/12/8	1200	8	40	44000	2600～8000
17	NL/13/8	1200	8	40	51000	3000～8700

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