An extraction concentration apparatus

Abstract

The application relates to an extraction and concentration device in the technical field of chemical equipment, which comprises an extraction tank, a concentration tank, a condenser, a solvent recovery tank, pipelines A, B, C, D and E and a self-adapting movable support, an extension pipe and a bent hose are connected between a defoaming spraying nozzle and a spraying ring pipe, a self-adapting movable support is arranged between the defoaming spraying nozzle extension pipe and the liquid level in the concentration tank, the self-adapting movable support is self-adaptingly lifted according to the height of the liquid level in the concentration tank, thereby driving the extension pipe to swing and adjust the spraying angle, and the extension pipe and the defoaming spraying nozzle can be automatically swung according to the height of the liquid level of the concentrated liquid, so that the coverage area of the spraying water column can be as close as possible to the middle part of the liquid level of the concentrated liquid, the continuous area of the non-coverage area is reduced, and the problem that a large amount of bubbles gather in the middle part of the liquid level and cannot play a good defoaming role is avoided.

Description

Technical Field

[0001] This invention relates to an extraction and concentration device, belonging to the technical field of chemical equipment. Background Technology

[0002] Small-scale hot reflux extraction and concentration equipment is mainly used in the pharmaceutical and fragrance extraction industries. The concentration method adopts boiling evaporation, which has a slow evaporation rate, high energy consumption, and long high-temperature boiling time. This can easily cause the effective components to react and change, and the evaporated material is prone to coking on the cylinder wall. Many substances tend to produce a lot of foam when boiling. The original equipment installed a mesh screen at the vacuum suction port of the concentration tank to intercept and defoam, but the effect was poor. It could not actively eliminate the foam generated during the boiling process in the concentration tank, and the generation of foam also affected the evaporation efficiency.

[0003] To address this, Chinese invention patent application CN201110026747.0 discloses an improved hot reflux extraction and concentration device, comprising at least a concentration tank, an extraction tank, a pump body, and a circulation pipeline connecting the concentration tank, extraction tank, and pump body. The circulation pipeline includes at least: pipeline I, connecting the concentration tank, extraction tank, and pump body; pipeline II, connecting the concentration tank and extraction tank; pipeline III, connecting the pump body and pipeline II; and a spray ring pipe connected to pipeline II and fixed inside the concentration tank. A valve is installed on pipeline II, located between the concentration tank and pipeline III. The pump body is a screw pump. Compared with the prior art, this invention's hot reflux extraction and concentration device fully utilizes the thermal energy of the cylinder above the liquid surface, effectively increasing the evaporation surface area. It offers advantages such as improved concentration efficiency, ensuring uniform concentrate quality, shortening concentration time, reducing concentration energy consumption, enhancing defoaming ability during concentration, and completely solving the problem of coking on the cylinder wall.

[0004] The defoaming principle of this device is as follows: Figure 6 As shown, spray holes with an inclined angle are opened on the spray ring pipe. The inclined spray water column sprays onto the liquid surface of the concentrate tank to eliminate vapor bubbles. In the specific implementation of this scheme, because the inclination angle of the spray holes is fixed, when the liquid level in the concentrate tank changes significantly, such as at high or low liquid levels as shown in the figure, the coverage area of ​​the spray water column on the liquid surface will be concentrated at the center or edge of the liquid surface. Figure 7 As shown, regardless of whether the covered area is concentrated in the center or edge of the liquid surface, it will result in a large continuous area of ​​uncovered area, which will cause a large number of bubbles to still accumulate in the middle of the liquid surface, thus failing to play a good defoaming role. Summary of the Invention

[0005] To address the aforementioned problems in the existing technology, the present invention provides an extraction and concentration device.

[0006] The technical solution of the present invention is as follows:

[0007] An extraction and concentration apparatus includes an extraction tank, a concentration tank, a condenser, a solvent recovery tank, and further includes;

[0008] Pipeline A, which connects the extraction tank and the concentration tank;

[0009] Pipeline B, which connects the concentration tank and the condenser;

[0010] Pipeline C, which connects the condenser and the solvent recovery tank;

[0011] Pipeline D, which connects the solvent recovery tank and the extraction tank;

[0012] Pipeline E is connected between the bottom circulation outlet and the upper circulation inlet of the concentration tank. A circulation pump is installed on pipeline E. One end of pipeline E connected to the upper circulation inlet is connected to a spray ring pipe. One or more wall-mounted spray nozzles are arranged in a ring on the outer side of the bottom of the spray ring pipe, and one or more defoaming spray nozzles are arranged in a ring on the inner side of the bottom of the spray ring pipe. An extension pipe and a flexible bend are connected between the defoaming spray nozzles and the spray ring pipe.

[0013] An adaptive movable support is provided, with its upper and lower ends in contact with the extension tube and the liquid surface inside the concentration tank, respectively. The adaptive movable support adjusts its position by adjusting the height of the liquid level inside the concentration tank, thereby causing the extension tube to swing and adjust the spray angle.

[0014] The adaptive movable support includes a mounting base fixedly installed on the inner wall of the concentration tank. A lifting rod is slidably mounted on the mounting base via a linear bearing. A float is connected to the lower end of the lifting rod, and a diagonal brace is connected to the upper end of the lifting rod. A U-shaped support is provided at the upper end of the diagonal brace, and the extension tube is movably held in place on the U-shaped support.

[0015] The U-shaped support has sliding grooves on both sides, and the extension tube has pins on both sides of its outer walls. The pins on both sides are placed in the sliding grooves on both sides and maintain a sliding connection.

[0016] The lower end of the diagonal brace is fixedly connected to a sleeve, which is movably sleeved onto the upper end of the lifting rod, and a positioning bolt is screwed onto the outer wall of the sleeve.

[0017] The bent hose is a section of plastic corrugated pipe, metal serpentine pipe, or rubber hose.

[0018] The wall-mounted spray nozzle faces outward and downward, with an angle between it and the vertical plane between 30° and 60°.

[0019] The defoaming spray nozzle faces inward and downward, and the angle between it and the vertical plane is between 15° and 75°.

[0020] The spray nozzle diameter of the wall-mounted spray nozzle is 2-3 times that of the defoaming spray nozzle.

[0021] It also includes a solvent replenishment tank, which is connected to the solvent recovery tank via pipeline F.

[0022] The solvent recovery tank is equipped with a solvent concentration detector.

[0023] The present invention has the following beneficial effects:

[0024] 1. This invention discloses an extraction and concentration device. Through a spray ring pipe installed inside the concentration tank, a portion of the concentrated liquid is sprayed onto the tank wall via wall-mounted spray nozzles at an angle of 30°-60° outside the spray ring pipe. The liquid flows down the tank wall, making full contact with the heating surface for heat exchange, forming film evaporation and increasing the evaporation area. Another portion of the concentrated liquid is sprayed irregularly towards the center of the concentration tank via defoaming spray nozzles at an angle of 15°-75° inside the spray ring pipe, thus defoaming. This invention primarily utilizes film evaporation, supplemented by boiling evaporation, to improve evaporation efficiency. The spray defoaming method eliminates foam in its early stages, making it a relatively effective defoaming method, reducing foam generation in the concentration tank and minimizing its impact on evaporation.

[0025] 2. The present invention provides an extraction and concentration device, wherein an extension pipe and a bent flexible hose are connected between the defoaming spray nozzle and the spray ring pipe, and an adaptive movable support is set between the extension pipe of the defoaming spray nozzle and the liquid surface in the concentration tank. The adaptive movable support adjusts the spray angle by adjusting the height of the liquid level in the concentration tank, thereby automatically controlling the extension pipe and the defoaming spray nozzle to swing according to the liquid level of the concentrate. This ensures that the coverage area of ​​the spray water column is as close as possible to the middle of the liquid surface of the concentrate, reducing the continuous area of ​​the non-covered area, thereby avoiding the failure to achieve a good defoaming effect due to the accumulation of a large number of bubbles in the middle of the liquid surface. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of an extraction and concentration device according to the present invention;

[0027] Figure 2 This is a schematic diagram of the internal structure of the concentration tank in an extraction and concentration device according to the present invention;

[0028] Figure 3 This is a schematic diagram of the nozzle distribution structure on the spray ring pipe of an extraction and concentration device according to the present invention;

[0029] Figure 4 This is a schematic diagram of the adaptive movable support structure of an extraction and concentration device according to the present invention;

[0030] Figure 5 This is a schematic diagram of the extension tube installation structure of an extraction and concentration device according to the present invention;

[0031] Figure 6 A schematic diagram illustrating the defoaming principle of an existing improved hot reflux extraction and concentration device;

[0032] Figure 7 This diagram illustrates the effect of an existing improved hot reflux extraction and concentration device at different liquid levels.

[0033] The reference numerals in the figure are as follows:

[0034] 1-Extraction tank, 2-Concentration tank, 3-Condenser, 4-Solvent recovery tank, 5-Pipeline A, 6-Pipeline B, 7-Pipeline C, 8-Pipeline D, 9-Pipeline E, 10-Circulation pump, 11-Spray ring pipe, 12-Wall-mounted spray nozzle, 13-Defoaming spray nozzle, 14-Extension pipe, 141-Pin, 15-Bent hose, 16-Adaptive movable bracket, 161-Mounting base, 162-Linear bearing, 163-Lifting rod, 164-Float ball, 165-Diagonal brace connecting rod, 166-U-shaped support, 1661-Slide groove, 167-Sleeve, 168-Positioning bolt, 17-Solvent replenishment tank, 18-Pipeline F. Detailed Implementation

[0035] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0036] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 An extraction and concentration device includes an extraction tank 1, a concentration tank 2, a condenser 3, a solvent recovery tank 4, and also includes pipelines A5, B6, C7, D8, E9, and an adaptive movable support 16; specifically:

[0037] Pipeline A5 connects the extraction tank 1 and the concentration tank 2; it is used to transport the extracted material solution to the concentration tank 2.

[0038] Pipeline B6 connects the concentration tank 2 and the condenser 3; it is used to transport the solvent water vapor generated by evaporation in the concentration tank 2 to the condenser 3.

[0039] Pipeline C7 connects condenser 3 and solvent recovery tank 4; it is used to discharge the condensed solvent formed after passing through condenser 3 to solvent recovery tank 4.

[0040] Pipeline D8 connects solvent recovery tank 4 and extraction tank 1; it is used to transport the condensed solvent in solvent recovery tank 4 to extraction tank 1 for reuse.

[0041] It also includes a solvent replenishment tank 17, which is connected to the solvent recovery tank 4 via a pipeline F18. The solvent recovery tank 4 is equipped with a solvent concentration detector. The concentration of the condensed solvent liquid after condensation and recovery varies. After the concentration of the condensed solvent in the solvent recovery tank 4 is detected by the solvent concentration detector, the solvent replenishment tank 17 replenishes the solvent recovery tank 4 with high or low concentration solvent for adjustment. Only when the solvent meets the concentration requirements is it discharged into the extraction tank 1 for extraction and then concentrated in the concentration tank 2.

[0042] Pipeline E9 connects the bottom circulation outlet and the top circulation inlet of the concentration tank 2. A circulation pump 10 is installed on pipeline E9. One end of pipeline E9 connected to the top circulation inlet is connected to a spray ring pipe 11, which is used to transport the concentrated liquid in the concentration tank 2 to the spray ring pipe 11 under the drive of the circulation pump 10. One or more wall-mounted spray nozzles 12 are arranged in a ring on the outer side of the bottom of the spray ring pipe 11. The wall-mounted spray nozzles 12 face downwards and outwards, with an angle between them and the vertical plane between 30° and 60°. One or more defoaming spray nozzles 13 are arranged in a ring on the inner side of the bottom of the spray ring pipe 11. The defoaming spray nozzles 13 face downwards and inwards, with an angle between them and the vertical plane between 15° and 75°. This allows a portion of the concentrated liquid to be sprayed onto the tank wall through the wall-mounted spray nozzles 12 at an angle of 30°-60° outside the spray ring pipe. The liquid flows down the tank wall and fully contacts the heating surface for heat exchange, forming a film evaporation and increasing the evaporation area. A portion of the concentrated liquid is sprayed irregularly towards the center of the concentration tank through defoaming nozzles 13 at an angle of 15°-75° inside the spray ring pipe, thus defoaming.

[0043] The spray nozzle diameter of the wall-mounted spray nozzle 12 is 2-3 times that of the defoaming spray nozzle 13, achieving primary film evaporation and secondary boiling evaporation to improve evaporation efficiency. The spray defoaming method eliminates foam in its initial stage of formation, making it a relatively effective defoaming method, reducing foam generation in the concentration tank and its impact on evaporation.

[0044] An extension tube 14 and a bent hose 15 are connected between the defoaming spray nozzle 13 and the spray ring pipe 11. The bent hose 15 is a section of plastic corrugated pipe, metal serpentine pipe or rubber hose to facilitate the swinging of the extension tube 14.

[0045] The upper and lower ends of the adaptive movable bracket 16 are in contact with the extension tube 14 and the liquid surface inside the concentration tank 2, respectively. The adaptive movable bracket 16 uses the height of the liquid level in the concentration tank 2 to adaptively raise and lower, thereby driving the extension tube 14 to swing and adjust the spray angle. In this way, it can automatically control the extension tube 14 and the defoaming spray nozzle 13 to swing accordingly according to the height of the liquid level of the concentrate, so that the coverage area of ​​the spray water column of the defoaming spray nozzle 13 can be as close as possible to the middle of the liquid surface of the concentrate, reducing the continuous area of ​​the non-covered area, thereby avoiding the inability to play a good defoaming role due to a large number of bubbles accumulating in the middle of the liquid surface.

[0046] Specifically, the adaptive movable support 16 includes a mounting base 161 fixedly installed on the inner wall of the concentration tank 2. A lifting rod 163 is slidably installed on the mounting base 161 via a linear bearing 162. A float 164 is connected to the lower end of the lifting rod 163, and a diagonal bracing rod 165 is connected to the upper end of the lifting rod 163. A U-shaped support 166 is provided at the upper end of the diagonal bracing rod 165. The extension tube 14 is movably held on the U-shaped support 166. When the liquid level changes, the float 164 can move with the liquid level, thereby driving the lifting rod 163, the diagonal bracing rod 165 and the U-shaped support 166 to move up and down, thereby driving the extension tube 14 and the defoaming spray nozzle 13 to swing accordingly.

[0047] The U-shaped support 166 has sliding grooves 1661 on both sides of its side walls, and pins 141 are provided on both sides of the outer wall of the extension tube 14. The pins 141 on both sides are respectively placed in the sliding grooves 1661 on both sides and maintain a sliding connection. When the U-shaped support 166 moves up and down, it provides relative movement space between the extension tube 14 and the U-shaped support 166.

[0048] The lower end of the diagonal brace 165 is fixedly connected to a sleeve 167, which is movably sleeved on the upper end of the lifting rod 163. A positioning bolt 168 is screwed onto the outer wall of the sleeve 167. By tightening or loosening the positioning bolt 168, the installation height of the sleeve 167 relative to the lifting rod 163 can be adjusted up and down. This is used to adjust the installation position during equipment installation, so that at the current liquid level, the support height of the U-shaped support 166 can maximize the spray angle of the defoaming spray nozzle 13 towards the middle of the concentrated liquid surface.

[0049] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. An extraction and concentration device, characterized in that: It includes an extraction tank (1), a concentration tank (2), a condenser (3), a solvent recovery tank (4), and also includes; Pipeline A (5) is connected between the extraction tank (1) and the concentration tank (2); Pipeline B (6) is connected between the concentration tank (2) and the condenser (3); Pipeline C(7), which is connected between the condenser (3) and the solvent recovery tank (4); Pipeline D(8), which is connected between the solvent recovery tank (4) and the extraction tank (1); Pipeline E (9) is connected between the bottom circulation outlet and the upper circulation inlet of the concentration tank (2). A circulation pump (10) is installed on pipeline E (9). One end of pipeline E (9) connected to the upper circulation inlet is connected to a spray ring pipe (11). One or more wall-mounted spray nozzles (12) are arranged in a ring on the outer side of the bottom of the spray ring pipe (11). One or more defoaming spray nozzles (13) are arranged in a ring on the inner side of the bottom of the spray ring pipe (11). An extension pipe (14) and a bent hose (15) are connected between the defoaming spray nozzle (13) and the spray ring pipe (11). An adaptive movable support (16) is provided. The upper and lower ends of the adaptive movable support (16) are in contact with the liquid surface inside the extension tube (14) and the concentration tank (2) respectively. The adaptive movable support (16) uses the liquid level inside the concentration tank (2) to adaptively raise and lower, thereby driving the extension tube (14) to swing and adjust the spray angle. The adaptive movable support (16) includes a mounting base (161) fixedly installed on the inner wall of the concentration tank (2). A lifting rod (163) is slidably installed on the mounting base (161) via a linear bearing (162). A float (164) is connected to the lower end of the lifting rod (163). A diagonal bracing rod (165) is connected to the upper end of the lifting rod (163). A U-shaped support (166) is provided at the upper end of the diagonal bracing rod (165). The extension tube (14) is movably held in place on the U-shaped support (166). The U-shaped support (166) has sliding grooves (1661) on both sides of its side walls, and the extension tube (14) has pins (141) on both sides of its outer side walls. The pins (141) on both sides are respectively placed in the sliding grooves (1661) on both sides and maintain a sliding connection. The lower end of the diagonal brace (165) is fixedly connected to a sleeve (167), which is movably sleeved on the upper end of the lifting rod (163). A positioning bolt (168) is screwed onto the outer wall of the sleeve (167).

2. The extraction and concentration equipment as described in claim 1, characterized in that: The bent hose (15) is a section of plastic corrugated pipe, metal serpentine pipe or rubber hose.

3. The extraction and concentration equipment as described in claim 1, characterized in that: The wall-mounted spray nozzle (12) faces outward and downward, with an angle between it and the vertical plane between 30° and 60°.

4. The extraction and concentration equipment as described in claim 1, characterized in that: The defoaming spray nozzle (13) faces inward and downward, with an angle between it and the vertical plane between 15° and 75°.

5. The extraction and concentration equipment as described in claim 1, characterized in that: The spray nozzle diameter of the wall-mounted spray nozzle (12) is 2-3 times that of the defoaming spray nozzle (13).

6. The extraction and concentration equipment as described in claim 1, characterized in that: It also includes a solvent replenishment tank (17), which is connected to the solvent recovery tank (4) via a pipeline F (18).

7. The extraction and concentration apparatus as described in claim 6, characterized in that: The solvent recovery tank (4) is equipped with a solvent concentration detector.

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