Extraction equipment
By employing a two-layer clarification chamber structure and a high-efficiency mixer in the extraction equipment, the shortcomings of traditional extraction equipment in terms of separation efficiency and cost are solved, achieving efficient and low-cost extraction operation and simplifying the maintenance process.
Patent Information
- Application Number
- CN202520686021.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-12
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-04-12
AI Technical Summary
Existing extraction equipment struggles to balance separation efficiency and equipment cost, especially in large-scale production where it requires a large footprint, involves high investment, is complex to maintain, and carries the risk of pipeline blockage and leakage.
An extraction device including a high-efficiency mixer, a clarification tank, and an aqueous phase conditioner was designed. It adopts a two-layer clarification chamber structure, in which the mixture flows from the front end to the back end and then back to the front end, increasing the clarification time. The high-efficiency mixer provides power, reducing the need for dark pipe layout and simplifying maintenance.
It improves separation efficiency, reduces equipment investment and floor space costs, while also reducing the difficulty of daily maintenance and solving the problems of pipeline blockage and leakage.
Smart Images
Figure CN223901273U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of extraction equipment, and specifically relates to an extraction equipment. BACKGROUND
[0002] Extraction, also known as solvent extraction or liquid-liquid extraction, is a unit operation that separates mixtures by taking advantage of the different solubilities of components in solvents. That is, it is a method that transfers solute substances from one solvent to another by taking advantage of the different solubilities or distribution coefficients of substances in two mutually insoluble (or slightly soluble) solvents. It is widely used in chemical, metallurgical, food and other industries, and is commonly used in petroleum refining industry. In addition, the operation of separating the two mutually insoluble liquids after extraction is called liquid separation.
[0003] Solid-liquid extraction, also known as leaching, separates components in solid mixtures with solvents, such as leaching sugar from sugar beets with water, leaching soybean oil from soybeans with alcohol to increase oil yield, and leaching effective components from traditional Chinese medicine with water to prepare lixivium.
[0004] Compared with other methods of separating solution components, extraction has the advantages of normal temperature operation, energy saving, no involvement of solids and gases, and convenient operation. Extraction is usually beneficial in the following cases: ① The boiling points of components in the feed liquid are similar, and even form azeotropes, which makes it difficult to achieve the desired results by distillation, such as the separation of alkanes and aromatic hydrocarbons in petroleum distillates, and the removal of phenol from coal tar; ② The separation of low-concentration high-boiling components, which requires a lot of energy for distillation, such as the dehydration of dilute acetic acid; ③ The separation of multiple ions, such as the separation and purification of mineral leaching solution, which involves adding chemicals for fractional precipitation, resulting in poor separation quality, filtration operation, and large loss; ④ The separation of unstable substances (such as heat-sensitive substances), such as the preparation of penicillin from fermentation broth.
[0005] The application of extraction is still developing. Most of the elements in the periodic table can be extracted and separated by extraction. The selection and development of extractants, the determination of process and operating conditions, and the design and calculation of flow and equipment are all topics for the development of extraction operations.
[0006] Extraction equipment, also known as extractor, is a type of mass transfer equipment used for extraction operation, which can make the extractant and the feed liquid well contact to achieve perfect separation of the components contained in the feed liquid, and there are two types of fractional contact and micro-contact. In extraction equipment, one phase is usually dispersed in the form of liquid droplets in another phase, and liquid membrane dispersion is rarely used.
[0007] Common extraction equipment includes mixing clarifier, extraction tower and centrifugal extractor.
[0008] Mixing-settler: a piece of equipment consisting of two sections, a mixing chamber and a settling chamber, and belonging to the class of staged contact mass transfer equipment. The mixing chamber is equipped with an agitator to promote droplet break-up and uniform mixing. Some agitators are capable of pumping the heavy phase from below, thus ensuring the flow of the heavy phase from stage to stage. The settling chamber is a large cross-sectional area chamber, sometimes equipped with guide plates and screens to accelerate droplet coalescence and layering. Depending on the separation requirements, the mixing-settler can be used as a single stage or as a cascade. When operated as a cascade countercurrently, the feed and extractant are fed to the stages at opposite ends of the cascade, and the raffinate and extract are withdrawn at opposite locations. The working volume of the mixing chamber is calculated from the total flow of feed and extractant multiplied by the time required for the extraction process. The cross-sectional area of the settling chamber is calculated from the flow of dispersed phase liquid divided by the coalescence and layering velocity of the droplets. These operating parameters must be determined experimentally. It is generally accepted that the stages are approximately equal in efficiency when the same power input per unit volume of mixing chamber is used. Therefore, when scaling up, the production equipment can be designed using the measured extraction time and layering velocity. The mixing-settler is simple in construction, has high stage efficiency, and has a small scale-up effect, and can be adapted to various production scales, but has a large investment and operating cost.
[0009] Extraction column: a column device used for extraction, including packed column, sieve tray column, rotating disc column, pulsating column and vibrating plate column, etc. The column body is a vertical cylinder. The light phase is fed from the bottom and overflows from the top; the heavy phase is fed from the top and is withdrawn from the bottom; and the two phases flow countercurrently in the column. Except for the sieve tray column, various extraction columns belong to the class of differential contact mass transfer equipment. The middle part of the column is the working section, and the two ends are the separation sections, which are used for coalescence and layering of the dispersed phase droplets and for the settling separation of the fine droplets of the continuous phase entrained, respectively. In the packed column and sieve tray column used for extraction, the liquid relies on its own energy for dispersion and mixing, and thus the equipment efficiency is low, and the columns are only used in easy extraction or in cases where the requirements are not high.
[0010] Centrifugal extractor: since the centrifugal force can be used to accelerate the settling and layering of the droplets, the stirring can be intensified to finely break the droplets, thereby strengthening the extraction operation. The centrifugal extractor has two types, i.e., the staged contact type and the differential contact type. The former is a centrifugal extractor with single stage or multiple stages formed by adding an agitator to the centrifugal separator, including the Lovesta and cylindrical centrifugal extractors. The latter is a centrifugal extractor with multiple concentric cylinders in the drum, and the cylinder wall is provided with holes to make the liquid have both film and droplet dispersion, such as the Bodbilinek centrifugal extractor. The centrifugal extractor is particularly suitable for the extraction of systems with small density difference between the two phases or systems prone to emulsification, and is also suitable for the extraction of materials with unstable chemical and physical properties, because the residence time of the materials in the machine is very short. Practical new type content
[0011] The utility model aims at overcoming the insufficient of prior art, provides an extraction equipment.
[0012] In order to reach the above-mentioned purpose, the utility model provides technical scheme as follows:
[0013] The extraction equipment comprises a high-efficiency mixer (1), a clarifying tank (2) and a water phase regulator (3); the upper layer of the inner cavity of the clarifying tank (2) is a mixed phase input and separation channel (21), the inlet end of the mixed phase input and separation channel (21) is communicated with the high-efficiency mixer (1), and the outlet end of the mixed phase input and separation channel (21) extends to the tail end of the clarifying tank (2) and is communicated with the lower layer of the inner cavity of the clarifying tank (2); the front end of the clarifying tank (2) is provided with the water phase regulator (3), the water phase outlet at the lower part of the front end of the clarifying tank (2) is communicated with the inlet at the lower part of the water phase regulator (3), and the upper part of the front end of the clarifying tank (2) is provided with an organic phase overflow port (22); the lower part of the water phase regulator (3) is further provided with an A water phase outlet (31), and the organic phase overflow port (22) is communicated with an organic phase output pipeline (4).
[0014] Preferably, the high-efficiency mixer (1) is provided with a high-level organic phase inlet (41) and a high-level water phase inlet (42).
[0015] Preferably, the lower part of the water phase regulator (3) is further provided with a B water phase outlet (32), and the high-efficiency mixer (1) is further provided with a current-level water phase return port (43), and the B water phase outlet (32) is communicated with the current-level water phase return port (43).
[0016] Preferably, the extraction equipment can be connected in parallel to form a multi-stage extraction equipment, and when connected in parallel, the high-level organic phase output pipeline (4) of the upper stage is communicated with the high-level organic phase inlet (41) of the high-efficiency mixer (1) of the lower stage, and the A water phase outlet (31) of the upper stage is communicated with the high-level water phase inlet (42) of the high-efficiency mixer (1) of the lower stage.
[0017] The utility model will be further explained as follows:
[0018] The traditional extraction tank is a step-by-step contact type extraction equipment for realizing two-phase separation by gravity, mainly comprising a mixing chamber and a clarifying chamber. The raw material liquid and the extractant first enter the mixing chamber through their respective feed ports, are mixed and mass transferred by the stirring of the stirrer, and then enter the clarifying chamber through the overflow baffle. Since the clarifying tank realizes separation by gravity, the equipment size in production is relatively large. Taking Q (flow rate) = S (cross-sectional area) * V (flow velocity) as an example, when Q (flow rate) and V (flow velocity) are increased, S (cross-sectional area) is reduced, so the larger the cross-sectional area of the equipment, the slower the flow velocity and the longer the clarification time, and the better the clarification effect. The larger the area, the higher the equipment occupation and investment cost. The utility model sets up two layers in the clarifying chamber, the mixed phase flows into the upper layer from the mixer, flows through the upper layer channel to the tail end and returns to the front end. Compared with the traditional clarifying chamber of the same size, the cross-sectional area is doubled, thereby prolonging the solution flow velocity and the solution clarification time. In summary, the utility model is superior to the traditional clarifying tank in terms of clarification time and equipment cost.
[0019] The traditional extraction production line stirring layout is two kinds. The first kind is staggered layout staggered in front and back, and the second kind is placed on the same side layout. The former can effectively avoid problems such as solution leakage caused by weld tearing and pipe fragmentation due to service life, and pipe blockage caused by crystallization in the process, but increases the cost of electric control and stirring, and is destined to install the stirring rack and the cable bridge in front and back of the tank body due to the layout, which brings extremely tedious daily operation, and the operator needs to walk back and forth to change the water phase regulator, and the latter only needs to adjust on the same side. The clarification tank has two-layer structure, the mixed liquid flows from the front end to the rear end and then from the rear end to the front end, so that the regulator, the stirring motor and the cable bridge are in one direction, and there is no hidden pipe in the tank, and the pipe needs to be connected at the outlet of the tank body, without considering the internal leakage and blockage problem, while taking into account the advantages of the traditional production line, the daily maintenance cost is greatly reduced.
[0020] In summary, in the structure design of the utility model, the high-efficiency mixer provides a power source, and the mixed two-phase solution is pressed into the clarification tank, the two-phase mixed liquid starts to separate after entering the upper layer, the mixed liquid which has not completed the separation continues to separate again in the lower layer, and after the separation is completed, the water phase enters the next stage through the regulator or returns to the stage, and the organic phase enters the next stage through the organic phase overflow port. The two-phase clarification time can be increased, thereby reducing equipment investment and land occupation, and the problems of backflow pipe / interstage pipe blockage and leakage can be solved. BRIEF DESCRIPTION OF DRAWINGS
[0021] Figure 1 : the structure diagram of the utility model;
[0022] Figure 2 : the top view of the utility model.
[0023] In the drawing: 1, high-efficiency mixer; 2, clarification tank; 21, mixed phase input and separation channel; 22, organic phase overflow port; 3, water phase regulator; 31, A water phase outlet; 32, B water phase outlet; 4, organic phase output pipeline; 41, upper-stage organic phase inlet; 42, upper-stage water phase inlet; 43, stage water phase backflow port. 32 is in communication with the stage water phase backflow port 43. The extraction equipment can be connected in parallel to form a multi-stage extraction equipment, when connected in parallel, the upper-stage organic phase output pipeline 4 of the upper-stage is in communication with the upper-stage organic phase inlet 41 of the lower-stage high-efficiency mixer 1, the upper-stage A water phase outlet 31 is in communication with the upper-stage water phase inlet 42 of the lower-stage high-efficiency mixer 1 DETAILED DESCRIPTION
[0024] The utility model will be further described below in combination with the drawings and examples. Example 1
[0025] Referring to Figure 1 and Figure 2, the extraction equipment comprises a high-efficiency mixer 1, a clarifying tank 2 and a water phase regulator 3; the upper layer of the inner cavity of the clarifying tank 2 is a mixed phase input and separation channel 21, the inlet end of the mixed phase input and separation channel 21 is communicated with the high-efficiency mixer 1, and the outlet end of the mixed phase input and separation channel 21 extends to the tail end of the clarifying tank 2 and is communicated with the lower layer of the inner cavity of the clarifying tank 2; the front end of the clarifying tank 2 is provided with the water phase regulator 3, the water phase outlet at the lower part of the front end of the clarifying tank 2 is communicated with the inlet at the lower part of the water phase regulator 3, and the upper part of the front end of the clarifying tank 2 is provided with an organic phase overflow port 22; the lower part of the water phase regulator 3 is further provided with an A water phase outlet 31, and the organic phase overflow port 22 is communicated with an organic phase output pipeline 4.
[0026] The high-efficiency mixer 1 is provided with a high-level organic phase inlet 41 and a high-level water phase inlet 42. The lower part of the water phase regulator 3 is further provided with a B water phase outlet 32, and the high-efficiency mixer 1 is further provided with a current-level water phase backflow port 43, and the B water phase outlet 32 is communicated with the current-level water phase backflow port 43. The extraction equipment can be connected in parallel to form a multi-stage extraction equipment, and when connected in parallel, the organic phase output pipeline 4 of the previous stage is communicated with the high-level organic phase inlet 41 of the high-efficiency mixer 1 of the next stage, and the A water phase outlet 31 of the previous stage is communicated with the high-level water phase inlet 42 of the high-efficiency mixer 1 of the next stage.
[0027] The clarifying tank described in the embodiment has a two-layer structure, the high-efficiency mixer provides a power source, and the mixed two-phase solution is pressed into the clarifying tank, the two-phase mixed solution starts to separate after entering the upper layer, the mixed solution that has not completed the separation continues to perform secondary separation in the lower layer, and after the separation is completed, the water phase enters the next stage through the regulator or is backflowed to the current stage, and the organic phase enters the next stage through the organic phase overflow port. That is, the mixed solution first flows from the front end to the rear end and then flows from the rear end to the front end, so that the regulator, the stirring motor and the cable bridge are all in one direction, there is no hidden pipe in the tank, and only the pipe needs to be connected at the outlet of the tank body, without considering the problems of internal leakage and blockage, while the advantages of the traditional production line are considered, the daily maintenance cost is greatly reduced.
Claims
1. An extraction apparatus, characterised in that, The extraction equipment comprises a high-efficiency mixer (1), a clarifying tank (2) and a water phase regulator (3); the upper layer of the inner cavity of the clarifying tank (2) is a mixed phase input and separation channel (21), the inlet end of the mixed phase input and separation channel (21) is communicated with the high-efficiency mixer (1), the outlet end of the mixed phase input and separation channel (21) extends to the tail end of the clarifying tank (2) and is communicated with the lower layer of the inner cavity of the clarifying tank (2); the front end of the clarifying tank (2) is provided with the water phase regulator (3), the water phase outlet of the lower part of the front end of the clarifying tank (2) is communicated with the inlet of the lower part of the water phase regulator (3), the upper part of the front end of the clarifying tank (2) is provided with an organic phase overflow port (22); the lower part of the water phase regulator (3) is further provided with an A water phase outlet (31), and the organic phase overflow port (22) is communicated with an organic phase output pipeline (4).
2. The extraction apparatus of claim 1, wherein, The high-efficiency mixer (1) is provided with a high-level organic phase inlet (41) and a high-level water phase inlet (42).
3. The extraction apparatus of claim 1, wherein, The lower part of the water phase regulator (3) is further provided with a B water phase outlet (32), and the high-efficiency mixer (1) is further provided with a current-level water phase backflow port (43), and the B water phase outlet (32) is communicated with the current-level water phase backflow port (43).
4. The extraction apparatus of any one of claims 1 to 3, wherein, The extraction equipment can be connected in parallel to form a multi-stage extraction equipment, when connected in parallel, the organic phase output pipeline (4) of the upper stage is communicated with the high-level organic phase inlet (41) of the high-efficiency mixer (1) of the lower stage, and the A water phase outlet (31) of the upper stage is communicated with the high-level water phase inlet (42) of the high-efficiency mixer (1) of the lower stage.