The extraction equipment is a kind of mass transfer equipment used for the extraction operation, which can achieve perfect separation of the components contained in the feed liquid. The extraction equipment can be divided into a mixing clarifier (extraction tank), an extraction tower and a centrifugal extractor according to the structure. The extraction device, also known as the extractor, is a kind of mass transfer equipment used for the extraction operation, which can make the extractant and the liquid well contact, and realize the perfect separation of the components contained in the liquid, and there are two types of classification contact and differential contact. In an extraction apparatus, usually one phase is dispersed in another phase in a droplet state, and is rarely dispersed in a liquid film state. There are many types of extraction equipment, which are divided into three categories according to the equipment structure: 1. The mixing clarifier (extraction tank) is composed of a mixing chamber and a clarification chamber, and belongs to a hierarchical contact mass transfer device. A stirrer is installed in the mixing chamber to promote droplet breakage and uniform mixing. Some agitators can draw heavy phases from below, thereby ensuring that heavy phases flow between stages. The clarification chamber is an empty chamber with a large horizontal cross-sectional area, and is sometimes provided with a guide plate and a wire mesh to accelerate the aggregation and delamination of the droplets. According to the separation requirements, the mixing clarifier can be used in a single stage or in a cascade. When the cascade is operated in countercurrent, the feed liquid and the extractant are separately fed to the stages at both ends of the cascade, and the raffinate and the extract are led out in the stage at the opposite position. The working volume of the mixing chamber can be calculated from the total flow of the feed and extractant multiplied by the time required for the extraction process. The horizontal cross-sectional area of ​​the clarification chamber can be calculated from the flow rate of the dispersed phase liquid divided by the condensed stratification rate of the droplets. These operating parameters must be determined experimentally. It is generally believed that when the unit volume mixing chamber consumes the same stirring power, the level effects are approximately equal. Therefore, when the design is enlarged, the production equipment can be designed according to the measured extraction time and delamination speed. The mixing clarifier has a simple structure, high level efficiency, small amplification effect, and can adapt to various production scales, but the investment and operation costs are large. 2. Extraction tower The tower equipment used for extraction includes a packed tower, a sieve tray tower, a rotary tray tower, a pulsation tower and a vibrating plate tower. The tower bodies are all upright cylinders. The light phase enters from the bottom of the tower and overflows from the top of the tower; the heavy phase is added from the top of the tower and is led out from the bottom of the tower; the two flow in opposite directions in the tower. Except for sieve tray towers, most of the extraction towers belong to differential contact mass transfer equipment. The middle part of the tower is the working section, and the two ends are separated sections for the agglomeration stratification of the dispersed phase droplets and the sedimentation separation of the fine droplets entrained in the continuous phase. In the packed column and sieve tray for extraction, the liquid is dispersed and mixed by its own energy, so that the equipment is low in efficiency and is only used in an occasion where it is easy to extract or is not required to be high. Commonly used extraction tower types are: 1 turntable tower In the working section, a set of ring plates are installed equidistantly, and the working section is divided into a series of small chambers, and each room has a rotating disc as a stirrer in the center. These discs are mounted on a spindle located at the center of the tower and are rotated by mechanical means outside the tower. The rotary tower has a simple structure, large processing capacity and high separation efficiency, and is widely used in petroleum refining industry and petrochemical industry. 2 pulse tower A set of sieve plates (without overflow pipes) or packing is installed in the working section. The pulsating liquid flow generated by the pulsating device is introduced into the bottom of the tower through a pipe to reciprocate the entire liquid. The pulsating fluid flow is vortexed at a high speed relative to each other between the sieve plates or the packing, causing the droplets to be finely divided and evenly distributed. The pulsating tower can achieve higher separation efficiency, but the processing capacity is small, and it is often used in nuclear fuel and rare element factories. 3 vibrating plate tower The sieve plates are connected in a string, driven by a mechanical device mounted above the top of the tower, and reciprocated in the vertical direction, thereby agitating the liquid flow, which acts like a stirring in the pulsation tower. The design of the extraction tower is mainly to determine the diameter of the tower and the height of the working section. First, the liquid flow rate is divided by the operating speed to obtain the tower cross section, and the tower diameter is calculated. Then according to the characteristics of the tower and the nature of the system and the separation requirements, the mass transfer unit height and the mass transfer unit number are determined, and finally the two are multiplied to obtain the working height of the tower. There is also a calculation of the height of the working section by the equivalent height and the theoretical number of stages. 3. Centrifugal extractor extracting a dedicated centrifuge, since the centrifugal force can be used to accelerate the sedimentation stratification of the droplets, it is allowed to aggravate the agitation to make the droplets finely crush, thereby enhancing the extraction operation. Centrifugal extractors are classified into two types: graded contact and differential contact. The former is equipped with a stirring device in a centrifugal separator to form a single-stage or multi-stage centrifugal extractor, and has a Louis Vesta type and a cylindrical centrifugal extractor. The latter drum is equipped with a multi-layer concentric cylinder, and the wall of the cylinder is opened to make the liquid have a film-like and droplet-like dispersion, such as a Pod Bilne centrifugal extractor. The centrifugal extractor is particularly suitable for systems with low density or easy emulsification of two phases. It is also suitable for the extraction of substances with unstable chemical and physical properties due to the short residence time of the materials in the machine. More attention: Api Powder,Tianeptin Sodium,Medical Grade Hyaluronic Acid,Competitive Price Taurine Shaanxi YXchuang Biotechnology Co., Ltd , https://www.peptidenootropics.com