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Specifications
This system consist of extract autoclave,separation autoclave, resolve autoclave, storage tank, high-pressure pump and heat
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Brief Introduction of Supercritical CO2 Extraction System
- Technology Brief Introuduction
1. Basic Principles
The supercritical CO2 extraction system adopts CO2 solvent to get best extraction and separation effects under super critical condition. This system consists of extract autoclave, storage tank, high-pressure pump and heat exchanger, main flow chart as below.
Firstly, load the material in extract autoclave,Liquid CO2 from storage tank goes through
the high-pressure pump and heat exchanger, heated and pressurized to the required
temperature, and then goes into extract autoclave. The required ingredients are dissolved
in CO2 and taken out to separation autoclave,the extract are separated from the CO2 by
changing the pressure and temperature (to reduce the solubility)in separation autoclave. The
liquid CO2 after separation process goes into the condenser storage tank and recycling
after liquefaction
2. Application Range
The Supercritical CO2 extraction technology characterized by innocuity, smelless,
incombustible, normal temperature and free from contamination, etc. It can protect the original
color, smell, taste from heat affecting; even more prevent heat sensitive and Oxidizing material
from damage; moreover, it can separate and purify the extract during the extraction period, it is
widely used in food, medical, chemical, spice and many other industries.
3. Technical Characteristic:
High active ingredient content, little impurity, steady quality;
Characteristic odor of raw material from extract;
Faster extraction time, shorter production period;
Producing kinds of extract with different purity as per customer’s requirements;
Low temperature, sterilization and oxidation resistance characteristics of
Supercritical CO2 extraction technology makes quality assurance and improvement
of the extract;
Complete evaporation without solvent residue,very low content of heavy metal and
pesticide residue.
4. Technical specification:
Max. design pressure of extract autoclave:32 MPa,45MPa
Cryogenic temperature:0℃~10℃
Heater:Atmospheric temperature~90℃
Separation pressure:Equal or lesser than 8MPa
5. Key Technology
Application of new technology
Technology to form a complete set
High Pressure equipment
Composite material
Fast open seal
B.Equipment Brief Instruction
The supercritical CO2 extraction device designed by our company, adopt advanced technology,
such as CO2 main system, refrigeration system, hot water constant temperature system,
CO2secondary system , air elimination and clean system and automatic control system etc.,
which up to the advanced levels in the world.
1. CO2 main system, namely CO2 circulatory system:
In the system, carries on the extract and the separation to the material, this system consists of
the high pressure and medium-pressure vessels. The equipments including:
1) Extract autoclave: Used for extraction as main equipment, the full bore fast open structure
makes the operation time of cover open /close in 1 minute. A material basket in autoclave is
applied for loading and unloading. In the basket, the precise durable filtrating device can
prevent the material access in pipe and other equipment.
2) Separation autoclave: It is used in separating material by the system may consist of 1
autoclave or 1 column 1 autoclave or 2 autoclaves, or according to the user request.
3) Heat exchanger: The primary functions of Heat exchanger are:
a) To ensure the temperature of CO2 achieves the extract temperature and separation
temperature. b) To ensure the CO2`s liquefaction.
c) To ensure the CO2 can enter in the high-pressured CO2 pump to carry on the circulation,
this system has 4 heat exchangers. CO2 high-pressure pump: building up the pressure of CO2
to enable its pressure achieves the extraction pressure, the top pressure limits to 45MPa. The
velocity modulation system is equipped for flow control, and it is equipped with level 3
overpressure protective measure.
4) CO2 buffer tank: for liquid CO2.
5) CO2 storage tank: CO2 storage.
2. Refrigeration system:
This device adopts the double refrigeration system, at all request of different operating
conditions. The capacity of system can under a more precise control, and running steadier.
3. Hot water constant temperature system:
This installment is equipped with three sets of different hot water constant temperature
systems, for easy control of extract and separation temperature (the nos. of temperature
system may add according to user’s request)
4. Electric instruments control:
The temperature and the pressure value can be controlled automatically and display on the
device. High-pressured CO2 flow meter, the high-pressured CO2 liquid level indicator is
applied for supervising the system’s running condition. All temperature, pressure, capacity and
liquid level of the system are recorded and demonstrated by the computer.
5. Safety:1) The safety valve is set according to the pressure vessel safe supervision stipulation.
2) Addition multistage limiting pressures and stop device to the high-pressure pump,
guarantees the safety and reliability.
3) The high-pressure vessel uses the stress analytic method for design.
4) The autoclave has the pressure and the differential pressure automatic monitoring alarm
system when it running and uncaps, this can prevent it from damage during the movement
process of hanging basket (material basket) cause by the differential pressure inside and
outside, and this can also prevent it from accident when uncaps.
6. CO2 secondary system:
1) This installment is equipped with the CO2 recovery system, for recycling CO2 before the
extract autoclave opening.
2) Equipped with the initialize the system, it prevents the system parameters fluctuate and
make process stable during the replacement of two extract autoclaves.
7. Air elimination and clean system.
1) This installment is equipped with air scavenging system; it can sweep the mix-air cause by
loading and discharge materials to ensure the CO2 purity.
2) Equipped with convenient clean system, in order to change product easily.
C. Reference pictures
1, Small Supercritical CO2 Extraction System
2, Large Supercritical CO2 Extraction System
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