Botanical drug low-temperature extraction concentrator and process method
By using heat transfer oil and condensation recovery technology, the problems of instability of the medicinal liquid and complexity of the equipment caused by steam heating are solved, realizing the stability and safety of medicinal liquid heating, and improving heat exchange efficiency and cleaning effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-02-04
- Publication Date
- 2026-03-31
AI Technical Summary
Existing concentrators use steam heating during the initial heating stage, which can easily lead to excessively high temperatures in the liquid, affecting the stability of the components. Furthermore, steam boilers increase the complexity and risk of the equipment.
The concentrator is heated by heat transfer oil. The double spiral heating rod and spiral oil channel in the concentric oil tank increase the contact area of the liquid medicine. The boiling point is lowered by a water ring vacuum pump. The steam is recovered by a condensation recovery mechanism. The cleaning effect is improved by cleaning nozzles and cleaning rods.
It achieves stability and safety in heating the liquid medicine, improves heat exchange efficiency, simplifies the equipment structure, and reduces operational complexity and safety risks.
Smart Images
Figure CN121754912A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of concentrator technology, and in particular to a low-temperature extraction concentrator and process method for herbal medicines. Background Technology
[0002] The double-effect external circulation concentrator is a device used for liquid concentration, widely applied in industries such as chemical, pharmaceutical, food, and environmental protection. It improves thermal efficiency through two-stage evaporation, thereby saving energy and costs. The double-effect concentrator utilizes simultaneous evaporation in two stages, fully utilizing secondary steam, saving on boiler investment and energy consumption—reducing energy consumption by 50% compared to single-effect concentrators. The double-effect concentrator employs external heating, natural circulation, and vacuum negative pressure, resulting in rapid evaporation and a high concentration ratio. Liquids are concentrated in a fully sealed environment without foaming, producing a pollution-free solution with a strong medicinal flavor.
[0003] Research indicates that current concentrators primarily use steam to heat the pipes during initial heating, allowing the concentrated pharmaceutical solution to circulate and contact the outer wall of the pipes for heat exchange. This heating method has several drawbacks: firstly, the steam pipe temperature is difficult to control, leading to excessively high temperatures in the pharmaceutical solution and affecting its composition; secondly, steam heating requires an additional steam boiler, increasing space requirements and posing a significant safety hazard, making the overall equipment complex and difficult to operate. To address these drawbacks of steam heating, we propose a novel low-temperature extraction concentrator and process for pharmaceuticals. Summary of the Invention
[0004] To overcome the aforementioned shortcomings of the prior art, the present invention aims to provide a concentrator that heats the concentration target using heat transfer oil. This invention provides a low-temperature extraction and concentration device and process method for plant-based medicines, including a condensation recovery mechanism and two identical support frames, a first support frame and a second support frame, placed side by side. Evaporation components a first evaporation assembly and a second evaporation assembly are respectively mounted on the top of the first support frame and the second support frame, and a steam delivery pipe connects the tops of the first evaporation assembly and the second evaporation assembly to provide auxiliary heating for the liquid to be concentrated in the next evaporation assembly. A one-way valve is provided between the outlet end of the second evaporation assembly and the inlet end of the condensation recovery mechanism. Both the first evaporation assembly and the second evaporation assembly include a heater a first heater and a second heater with identical structures and upward-opening barrel shapes. Concentric oil tanks are fixed inside both heaters a first heater and a second heater. The concentric oil tank comprises an outer and an inner tube connected together, both being hollow tubular structures with different diameters and coaxiality. The inner circumferences of the outer and inner tubes are respectively connected to a spiral oil passage one and a spiral oil passage two. An outer extension tube is pre-installed near the bottom of the outer circumference of the outer tube. An electric heater assembly is sealed and fixed at the end of the outer extension tube. A double-spiral heating rod extending into the concentric oil tank is provided at one end of the electric heater assembly near the outer extension tube. The double-spiral heating rod includes two spring-shaped heating supports, which are respectively located inside the outer and inner tubes and do not contact their inner walls. A filling tube, made of glass, is inserted into the top of the outer tube. The concentric oil tank is filled with heat-conducting oil.
[0005] Preferably, a second-stage bracket is reserved near the middle of the side of the support frame one, and heater one and heater two are respectively fixed at the top of the two second-stage brackets. The top of the support frame one and support frame two are respectively fixed with a first-effect concentrator and a second-effect concentrator with the same structure. The bottom of heater one and heater two are respectively connected to connecting pipe one and connecting pipe two. The outer circumference of heater one and heater two is opened near the top of ...
[0006] Preferably, a water ring vacuum pump is fixed to the rear side of both the first and second support frames, and the suction pipes of the two water ring vacuum pumps are respectively inserted into the tanks of the corresponding first-effect concentrator and second-effect concentrator. An electromagnetic sealing valve is provided in the middle of the two suction pipes to draw the internal pressure of the first and second evaporation components into negative pressure before each concentration heating, thereby reducing the boiling point of the liquid. The top of both the first and second support frames is provided with a support column for fixing the tank.
[0007] Preferably, both the first-effect concentrator and the second-effect concentrator are provided with a slag discharge section at their bottom ends, and the slag discharge section includes a discharge cone pipe. The bottom end of the discharge cone pipe is provided with a valve assembly. The outer circumference of both the first-effect concentrator and the second-effect concentrator is connected to a discharge pipe near the bottom end, and the discharge pipe is provided with a sealing valve 2 near the top end. When the concentration of the liquid medicine evaporates to the standard, the two sealing valves 2 can be opened to collect the finished product.
[0008] Preferably, both heater one and heater two are sealed with inspection covers at their top ends, and feed pipes and inclined water pipes two are inserted into the outer circumference of heater one and heater two near their top ends. The inclined water pipes two are used to rinse the interior of heater one and heater two later.
[0009] Preferably, the end of the steam conveying pipe away from the first-effect concentrator passes through the inner cavity of the heater and is fitted with a gas equalization plate. The gas equalization plate is a disc-shaped structure with an internal cavity, and multiple one-way gas outlet valves are embedded on the lower surface of the gas equalization plate. Each one-way gas outlet valve includes an outer pipe, and a retaining ring is reserved near the bottom of the inner circumference of the outer pipe. A plug with a diameter larger than the inner diameter of the retaining ring is provided on the lower surface of the retaining ring. A reset tension spring is fixed to the top of the plug, and a spring stop is fixed to the top of the reset tension spring. The spring stop is fixed to the inner wall of the outer pipe.
[0010] Preferably, both the first-effect concentrator and the second-effect concentrator have observation windows on their front sides, and both have cleaning mechanisms inside. The cleaning mechanism includes a cleaning rod with an overall S-shaped structure. The upper and lower ends of the cleaning rod are respectively reserved with coaxial rotating shafts, and the outer walls of the rotating shafts at both ends of the cleaning rod are provided with anti-detachment bearing assemblies. The outer walls of the two anti-detachment bearing assemblies are fixed with spoke support rods to fix the cleaning rod and the anti-detachment bearing assemblies to the inner wall of the tank. A brush strip is snapped onto the side of the cleaning rod close to the inner wall of the tank, and a fixing sleeve is sleeved and fixed on the rotating shaft at the top of the cleaning rod. Multiple round rods are fixed on the outer circumference of the fixing sleeve in a centrally symmetrical distribution, and the ends of the round rods are fixed with water-blocking bowls. A cleaning spray pipe is obliquely inserted into the outer wall of both the first-effect concentrator and the second-effect concentrator near the top.
[0011] Preferably, the inner circumferential walls of the first-effect concentrator and the second-effect concentrator are kept smooth, thereby ensuring that the cleaning rod will not make any contact during brushing. The spray direction of the first cleaning nozzle is tangent to the cross-sectional circle at its height, thereby generating the most effective impact force on the water-blocking bowl during cleaning.
[0012] Preferably, the condensation recovery mechanism includes a storage tank. Two vertically oriented cylindrical condensers with internal cavities are fixed to the top of the storage tank. Each condenser includes an outer tube, and the two condensers have identical internal structures. Insertion plates are fixed near both the top and bottom of the outer tube. Multiple condensation pipes are inserted between the two insertion plates. A baffle plate is fixed to the bottom of the insertion plate at the bottom of the outer tube. The two insertion plates and all the condensation pipes constitute a condensation component. The outer wall of the outer tube is located on the condensation component. Cooling water pipes are inserted into both ends of the outer cylinder, and an S-shaped channel is provided on the inner wall of the outer cylinder located in the middle of the condensing component. A folded pipe for ventilation is also provided between the two outer cylinders to condense the gas that was not completely condensed in the first condenser. A return flow collecting pipe is inserted into the upper surface of the outer wall of the outer cylinder near the bottom of the insertion fixing plate. The bottom end of the return flow collecting pipe is inserted into the liquid storage tank. Through the condensation recovery mechanism, the steam generated when the first and second effect concentrators boil can be condensed again for later use.
[0013] A low-temperature extraction process for plant-based medicines includes the following steps: S1: Before adding the chemical solution to the two feed pipes, close all valves directly connected to the tank to ensure that the interiors of heater one, heater two, first-effect concentrator, and second-effect concentrator are sealed. Then, start the two water ring vacuum pumps to perform a vacuuming operation. Finally, ensure that the level of the heat transfer oil in the concentric oil tank is in the middle of the filling pipe. S2: Next, add the medicine solution until it covers the top of the concentric oil tank, and the liquid level is below the bottom of the inclined insertion hole. Then, start the two electric heater groups to heat the heat transfer oil in the two concentric oil tanks. After the medicine solution in heater one boils, the generated high-temperature steam will enter the gas equalization plate in heater two through the steam delivery pipe, and then be sprayed out from the bottom of the one-way vent valve to heat the medicine solution in the double-effect concentrator. The steam produced will then enter a condenser for condensation and recycling. S3: By observing through the observation window and measuring with a concentration meter, once the liquid in the first and second effect concentrators reaches the predetermined concentration, it can be collected through the discharge pipe. When the inside of the tank needs to be cleaned after multiple collections, simply pump high-pressure water into the cleaning spray pipe. With the help of multiple water-blocking bowls on the outer wall of the cleaning rod, the cleaning rod can be driven to brush and clean the inner wall of the tank under the action of water force. Finally, it is discharged from the slag discharge section.
[0014] The beneficial effects of this invention are as follows: 1. By using the double spiral heating rods installed inside the concentric oil tank, a stable and continuous heat source can be provided for the concentrated medicine during heating, avoiding direct contact with the medicine to exchange heat and thus preventing damage to the internal components. In addition, with the setting of spiral oil channel one and spiral oil channel two, the contact area between the medicine and the concentric oil tank can be increased, improving the heat exchange efficiency. Moreover, the overall structure of the heating equipment is simple to operate, easy to maintain, and the safety factor is greatly improved.
[0015] 2. By using the steam distribution plate at the bottom of the steam delivery pipe, the steam generated in the first-effect concentrator can be transported back to the bottom of the concentrated liquid in the second heater, which can heat the liquid and improve the heat utilization rate.
[0016] 3. Through the cleaning spray pipe and multiple water-blocking bowls on the outer wall of the cleaning rod, the cleaning rod can be driven by the water impact to brush and clean the inner wall of the tank, thereby improving the cleaning effect. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall structure of a low-temperature extraction and concentration device for plant-based medicines proposed in this invention; Figure 2 This is a schematic diagram of the rear structure of a low-temperature extraction and concentrating device for plant-based medicines proposed in this invention; Figure 3 This is a front view of a low-temperature extraction and concentration apparatus for plant-based medicines proposed in this invention; Figure 4 This is a top view of a low-temperature extraction and concentration apparatus for plant-based medicines proposed in this invention; Figure 5 This invention proposes a low-temperature extraction and concentration device for plant-based medicines. Figure 4 Schematic diagram of the cross-sectional structure along line AA; Figure 6 This is a schematic diagram of the overall structure of heater one in a low-temperature extraction and concentrating device for herbal medicines proposed in this invention; Figure 7 This is a cross-sectional schematic diagram of heater two in a low-temperature extraction and concentrating device for herbal medicines proposed in this invention; Figure 8 This invention proposes a low-temperature extraction and concentration device for plant-based medicines. Figure 7 Enlarged structural diagram at point B; Figure 9 This is a schematic diagram of the overall structure of the cleaning rod in a low-temperature extraction and concentrating device for plant-based medicines proposed in this invention; Figure 10 This is a schematic diagram of the overall structure of the support frame in a low-temperature extraction and concentrating device for plant-based medicines proposed in this invention; Figure 11 This is a top view of a concentric oil tank in a low-temperature extraction and concentrating device for herbal medicines proposed in this invention; Figure 12 This invention proposes a low-temperature extraction and concentration device for plant-based medicines. Figure 11 A cross-sectional view of the structure along the CC line.
[0018] In the diagram: 1. Support frame one; 2. Connecting pipe one; 3. Support frame two; 4. Water ring vacuum pump; 5. Connecting pipe two; 6. Liquid storage tank; 7. Condenser; 701. Cooling water pipe; 702. Return flow converging pipe; 703. Bending pipe; 704. Condenser manifold; 8. One-way valve; 9. Second-effect concentrator; 10. Inclined spray pipe two; 11. Heater two; 12. Steam delivery pipe; 13. Cleaning spray pipe one; 14. First-effect concentrator; 15. Inclined spray pipe one; 16. Inclined water pipe two; 17. Electric heater group; 171. Double spiral heater. 18. Heater 1; 19. Second-stage bracket; 20. Discharge pipe; 21. Observation window; 22. Slag discharge section; 23. Cleaning rod; 24. Angled insertion hole; 25. Inspection cover; 26. Feed pipe; 27. Concentric oil tank; 271. Filling pipe; 272. Inner cavity pipe; 273. Spiral oil passage 1; 274. Spiral oil passage 2; 28. One-way vent valve; 281. Plug; 282. Spring stop; 29. Gas equalization plate; 30. Anti-detachment bearing assembly; 31. Brush strip; 32. Fixing sleeve; 33. Water-blocking bowl; 34. Support column. Detailed Implementation
[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.
[0020] In this invention, reference is made to Figures 1-12A low-temperature extraction and concentrating device for plant-based medicines includes a condensation recovery mechanism and two identical support frames 1 and 3 placed side by side. Evaporation components 1 and 2 are respectively mounted on the top of support frames 1 and 3, and a steam delivery pipe 12 connects the tops of evaporation components 1 and 2 for auxiliary heating of the liquid to be concentrated in the next evaporation component. A one-way valve 8 is installed between the outlet of evaporation component 2 and the inlet of the condensation recovery mechanism. Both component one and evaporation component two include heater one 18 and heater two 11 with identical upward-opening, barrel-shaped structures. Concentric oil tanks 27 are fixed inside both heater one 18 and heater two 11. Each concentric oil tank 27 includes an outer cavity tube and an inner cavity tube 272 connected together. The outer cavity tube and inner cavity tube 272 are hollow tubular structures with different diameters and coaxiality. The inner circumference of the outer cavity tube and inner cavity tube 272 are respectively connected to spiral oil passage one 273 and spiral oil passage two 274. An outer extension tube is pre-installed near the bottom of the outer circumference wall. An electric heater assembly 17 is sealed and fixed at the end of the outer extension tube. A double-helix heating rod 171, extending into the concentric oil tank 27, is provided at one end of the electric heater assembly 17 near the outer extension tube. The double-helix heating rod 171 includes two spring-shaped heating supports, which are respectively located inside the outer cavity tube and the inner cavity tube 272, and do not contact their inner walls. A filling tube 271, made of glass, is inserted into the top of the outer cavity tube. The oil drum 27 is filled with heat transfer oil. The double spiral heating rod 171 set in the concentric oil drum 27 can not only provide a stable and continuous heat source for the concentrated medicine during heating, avoiding direct contact with the medicine to exchange heat and thus avoid damaging the internal components, but also, with the setting of spiral oil channel one 273 and spiral oil channel two 274, can increase the contact area between the medicine and the concentric oil drum 27, improve the heat exchange efficiency, and the overall structure of the heating equipment is simple to operate, easy to maintain, and the safety factor is greatly improved.
[0021] Reference Figures 1-3The side of support frame 1 has a second-stage bracket 19 reserved near the middle, and heater 18 and heater 21 are respectively fixed to the top of the two second-stage brackets 19. The top of support frame 1 and support frame 2 are respectively fixed with a first-effect concentrator 14 and a second-effect concentrator 9 of the same structure. The bottom of heater 18 and heater 21 are respectively connected to connecting pipe 1 2 and connecting pipe 2 5. The outer circumference of heater 18 and heater 21 is opened with oblique insertion holes 24 near the top, and the two oblique insertion holes 24 are respectively The device is equipped with two oblique nozzles: one 15 and one 10. The other end of the oblique nozzle 15 is inserted into the middle of the first-effect concentrator 14, and the other end of the oblique nozzle 10 is inserted into the middle of the second-effect concentrator 9. This is used to transport the steam generated during boiling to either the first-effect concentrator 14 or the second-effect concentrator 9. The other end of the connecting pipe 12 is inserted into the bottom of the first-effect concentrator 14, and the other end of the connecting pipe 25 is inserted into the bottom of the second-effect concentrator 9. Based on the principle of the connector, a connection is formed, thereby maintaining boiling and the same concentration at both ends.
[0022] Reference Figure 2 Water ring vacuum pumps 4 are fixed to the rear side of both support frame 1 and support frame 3. The suction pipes of the two water ring vacuum pumps 4 are respectively inserted into the tanks of the corresponding first-effect concentrator 14 and second-effect concentrator 9. Electromagnetic sealing valves are installed in the middle of the two suction pipes to draw the internal pressure of evaporation component 1 and evaporation component 2 into negative pressure before each concentration heating, thereby reducing the boiling point of the liquid. Support columns 34 for fixing the tanks are installed at the top of both support frame 1 and support frame 3.
[0023] Reference Figure 3 Both the first-effect concentrator 14 and the second-effect concentrator 9 are equipped with a slag discharge section 22 at their bottom ends. The slag discharge section 22 includes a discharge cone pipe. The bottom end of the discharge cone pipe is equipped with a valve assembly 1. The outer circumference of the first-effect concentrator 14 and the second-effect concentrator 9 is connected to a discharge pipe 20 near the bottom end. The discharge pipe 20 is equipped with a sealing valve 2 near the top end. When the concentration of the liquid medicine evaporates to the standard, the two sealing valves 2 can be opened to collect the finished product.
[0024] Reference Figure 1 and Figure 6 Both heater 18 and heater 21 are sealed with inspection covers 25 at their top ends, and feed pipes 26 and inclined water pipes 26 are inserted into the outer circumference of heater 18 and heater 21 near their top ends. Inclined water pipes 26 are used to rinse the interior of heater 18 and heater 21 later.
[0025] Reference Figures 7-8One end of the steam conveying pipe 12, away from the first-effect concentrator 14, passes through the inner cavity pipe 272 in the heater 21 and is fitted with a gas equalization plate 29. The gas equalization plate 29 is a disc-shaped structure with an internal cavity, and multiple one-way gas outlet valves 28 are embedded on the lower surface of the gas equalization plate 29. The one-way gas outlet valve 28 includes an outer pipe, and a retaining ring is reserved near the bottom of the circumferential inner wall of the outer pipe. A plug 281 with a diameter larger than the inner diameter of the retaining ring is provided on the lower surface of the retaining ring. A reset spring is fixed to the top of the plug 281, and a spring stop block 282 is fixed to the top of the reset spring. The spring stop block 282 is fixed to the inner wall of the outer pipe. Through the gas equalization plate 29 set at the bottom of the steam conveying pipe 12, the steam generated in the first-effect concentrator 14 can be conveyed again to the bottom of the concentrated medicine liquid in the heater 21, which can heat the medicine liquid and improve the heat utilization rate.
[0026] Reference Figure 3 , Figure 6 and Figure 9 Both the first-effect concentrator 14 and the second-effect concentrator 9 have observation windows 21 on their front sides. Both concentrators have cleaning mechanisms inside, including a cleaning rod 23 with an overall S-shaped structure. Coaxial rotating shafts are pre-installed at both ends of the cleaning rod 23. Anti-detachment bearing assemblies 30 are installed on the outer walls of the rotating shafts at both ends of the cleaning rod 23. Spoke support rods are fixed to the outer walls of both anti-detachment bearing assemblies 30 to secure the cleaning rod 23 and the anti-detachment bearing assemblies 30 to the inner wall of the tank. The cleaning rod 23 is close to the inside of the tank. Brush strips 31 are snapped onto one side of the wall, and a fixing sleeve 32 is sleeved and fixed on the top rotating shaft of the cleaning rod 23. Multiple round rods are fixed on the outer circumference of the fixing sleeve 32, which are centrally symmetrically distributed. Water-blocking bowls 33 are fixed at the ends of the round rods. Cleaning spray pipes 13 are obliquely inserted near the top of the outer wall of the first-effect concentrator 14 and the second-effect concentrator 9. Through the cleaning spray pipes 13 and the multiple water-blocking bowls 33 on the outer wall of the cleaning rod 23, the cleaning rod 23 can be driven to brush and clean the inner wall of the tank under the action of water impact, thereby improving the cleaning effect.
[0027] In this invention, the inner circumferential walls of the primary concentrator 14 and the secondary concentrator 9 remain smooth, thereby ensuring that the cleaning rod 23 will not come into contact with anything during brushing. The spray direction of the cleaning nozzle 13 is tangent to the cross-sectional circle at its height, thereby generating the most effective impact force on the water-blocking bowl 33 during cleaning.
[0028] Reference Figures 1-3The condensation recovery mechanism includes a storage tank 6. Two vertically oriented cylindrical condensers 7 with internal cavities are fixed to the top of the storage tank 6. Each condenser 7 includes an outer tube, and the two condensers 7 have identical internal structures. Insertion plates are fixed near both the top and bottom of the outer tube. Multiple condensation pipes 704 are inserted between the two insertion plates. A baffle plate is fixed to the bottom of the insertion plate at the bottom of the outer tube. The two insertion plates and all the condensation pipes 704 constitute the condensation component. Insertion plates are located at the top and bottom of the outer tube at the condensation component. There is a cooling water pipe 701, and the inner wall of the outer cylinder is located in the middle of the condensing component. An S-shaped channel is provided on the outer wall. A folded pipe 703 for ventilation is also provided between the two outer cylinders to condense the gas that is not completely condensed in the first condenser 7. A return flow converging pipe 702 is inserted into the upper surface of the outer wall of the outer cylinder near the bottom of the insertion pipe fixing plate. The bottom end of the return flow converging pipe 702 is inserted into the liquid storage tank 6. Through the condensation recovery mechanism, the steam generated when the first-effect concentrator 14 and the second-effect concentrator 9 boil can be condensed again for later use.
[0029] A low-temperature extraction process for plant-based medicines includes the following steps: S1: Before adding the liquid medicine to the two feed pipes 26, close all valves directly connected to the tank body to ensure that the interiors of heater 18, heater 21, first-effect concentrator 14, and second-effect concentrator 9 are sealed. Then start the two water ring vacuum pumps 4 to perform a vacuuming operation. Next, ensure that the level of the heat transfer oil in the concentric oil tank 27 is in the middle of the filling pipe 271. S2: Then, add the medicine solution until it covers the top of the concentric oil tank 27, and the liquid level is below the bottom opening of the inclined insertion hole 24. Then, start the two electric heater groups 17 to heat the heat transfer oil in the two concentric oil tanks 27. After the medicine solution in heater one 18 boils, the generated high-temperature steam will enter the gas equalization plate 29 in heater two 11 through the steam delivery pipe 12, and then spray out from the bottom of the one-way gas outlet valve 28 to heat the medicine solution in the double-effect concentrator 9. The steam produced will then enter condenser 7 for condensation and recovery for later use. S3: By observing through the observation window 21 and measuring with the concentration meter, once the liquid in the first-effect concentrator 14 and the second-effect concentrator 9 reaches the predetermined concentration, it can be collected through the discharge pipe 20. When the inside of the tank needs to be cleaned after multiple collections, high-pressure water is pumped into the cleaning spray pipe 13. With the help of multiple water-blocking bowls 33 on the outer wall of the cleaning rod 23, the cleaning rod 23 can be driven to brush and clean the inner wall of the tank under the action of water force. Finally, it is discharged from the slag discharge section 22.
[0030] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.
Claims
1. A low-temperature extraction and concentration device for plant-based medicines, comprising a condensation recovery mechanism and two identical support frames, a first support frame (1) and a second support frame (3), placed side by side. The top ends of the first support frame (1) and the second support frame (3) are respectively provided with an evaporation assembly (1) and an evaporation assembly (2), and a steam delivery pipe (12) connects the top ends of the first evaporation assembly and the second evaporation assembly. A one-way valve (8) is provided between the outlet end of the second evaporation assembly and the inlet end of the condensation recovery mechanism. The device is characterized in that... Both the first evaporation assembly and the second evaporation assembly include a heater (18) and a heater (11) with identical structures and upward-opening barrel shapes. Concentric oil tanks (27) are fixed inside both heaters (18) and heater (11). Each concentric oil tank (27) includes an outer tube and an inner tube (272) connected together. The outer tube and the inner tube (272) are hollow tubular structures with different diameters and coaxiality. The inner circumference of the outer tube and the inner tube (272) are respectively connected to… There are two spiral oil channels (273 and 274), and an external extension tube is reserved near the bottom of the outer wall of the outer cavity tube. The end of the external extension tube is sealed and fixed with an electric heater group (17), and a double spiral heating rod (171) extending into the concentric oil tank (27) is provided at one end of the electric heater group (17) near the external extension tube. A filling tube (271) is inserted into the top of the outer cavity tube, and the filling tube (271) is made of glass material. The concentric oil tank (27) is filled with heat-conducting oil.
2. The low-temperature extraction and concentration apparatus for herbal medicines according to claim 1, characterized in that... The side of the support frame 1 (1) has a reserved second-stage bracket (19) near the middle, and the heater 1 (18) and heater 2 (11) are respectively fixed to the top of the two second-stage brackets (19). The top of the support frame 1 (1) and the support frame 2 (3) are respectively fixed with a first-effect concentrator (14) and a second-effect concentrator (9) with the same structure. The bottom of the heater 1 (18) and the heater 2 (11) are respectively connected to a connecting pipe 1 (2) and a connecting pipe 2 (5). The heater 1 (18) and the heater 2 (11) are respectively connected to a connecting pipe 1 (2) and a connecting pipe 2 (5). The outer circumference of the second heater (11) is provided with oblique insertion holes (24) near the top. Oblique nozzle one (15) and oblique nozzle two (10) are respectively inserted into the two oblique insertion holes (24). The other end of oblique nozzle one (15) is inserted into the middle of the first-effect concentrator (14), and the other end of oblique nozzle two (10) is inserted into the middle of the second-effect concentrator (9). The other end of the connecting pipe one (2) is inserted into the bottom of the first-effect concentrator (14), and the other end of the connecting pipe two (5) is inserted into the bottom of the second-effect concentrator (9).
3. A low-temperature extraction and concentration apparatus for herbal medicines according to claim 2, characterized in that... Water ring vacuum pumps (4) are fixed on the rear side of both the support frame one (1) and the support frame two (3), and the suction pipes of the two water ring vacuum pumps (4) are respectively inserted into the tanks of the corresponding first-effect concentrator (14) and second-effect concentrator (9). Electromagnetic sealing valves are provided in the middle of the two suction pipes.
4. A low-temperature extraction and concentration apparatus for herbal medicines according to claim 3, characterized in that... Both the first-effect concentrator (14) and the second-effect concentrator (9) are provided with a slag discharge section (22) at their bottom ends. The slag discharge section (22) includes a discharge cone pipe. The bottom end of the discharge cone pipe is provided with a valve assembly. The outer circumference of the first-effect concentrator (14) and the second-effect concentrator (9) is connected to a discharge pipe (20) near the bottom end. The discharge pipe (20) is provided with a sealing valve (2) near the top end.
5. A low-temperature extraction and concentration apparatus for herbal medicines according to claim 4, characterized in that... The top of both heater one (18) and heater two (11) are sealed with inspection covers (25), and feed pipes (26) and inclined water pipes two (16) are inserted into the outer circumference of heater one (18) and heater two (11) near the top.
6. A low-temperature extraction and concentration apparatus for herbal medicines according to claim 5, characterized in that... The end of the steam conveying pipe (12) away from the first-effect concentrator (14) passes through the inner cavity pipe (272) in the heater (11) and is fitted with a gas equalization plate (29). The gas equalization plate (29) is a disc-shaped structure with an internal cavity, and multiple one-way gas outlet valves (28) are embedded on the lower surface of the gas equalization plate (29). The one-way gas outlet valve (28) includes an outer pipe, and a retaining ring is reserved near the bottom of the circumferential inner wall of the outer pipe. A plug (281) with a diameter larger than the inner diameter of the retaining ring is provided on the lower surface of the retaining ring. A reset spring is fixed at the top of the plug (281), and a spring stop block (282) is fixed at the top of the reset spring. The spring stop block (282) is fixed on the inner wall of the outer pipe.
7. A low-temperature extraction and concentration apparatus for herbal medicines according to claim 6, characterized in that... Both the first-effect concentrator (14) and the second-effect concentrator (9) have observation windows (21) on their front sides, and both the first-effect concentrator (14) and the second-effect concentrator (9) have cleaning mechanisms inside. The cleaning mechanism includes a cleaning rod (23) with an overall S-shaped structure. The upper and lower ends of the cleaning rod (23) are respectively reserved with coaxial rotating shafts, and the outer walls of the rotating shafts at both ends of the cleaning rod (23) are provided with anti-detachment bearing assemblies (30). The two anti-detachment bearing assemblies (30) The outer wall of the 0) is fixed with spoke support rods. The side of the cleaning rod (23) close to the inner wall of the tank is fitted with a brush strip (31). The top of the cleaning rod (23) is fitted with a fixed sleeve (32). The outer circumference of the fixed sleeve (32) is fixed with multiple round rods that are centrally symmetrically distributed. The ends of the round rods are all fixed with water-blocking bowls (33). The outer walls of the first-effect concentrator (14) and the second-effect concentrator (9) are obliquely inserted with cleaning spray pipes (13) near the top.
8. A low-temperature extraction and concentration apparatus for herbal medicines according to claim 7, characterized in that... The inner circumferential walls of the first-effect concentrator (14) and the second-effect concentrator (9) remain smooth, and the spray direction of the cleaning nozzle (13) is tangent to the cross-sectional circle at its height.
9. A low-temperature extraction and concentration apparatus for herbal medicines according to claim 8, characterized in that... The condensation recovery mechanism includes a storage tank (6), and two vertically oriented cylindrical condensers (7) with internal cavities are fixed to the top of the storage tank (6). Each condenser (7) includes an outer tube, and the two condensers (7) have the same internal structure. Insertion tube fixing plates are fixed near both the top and bottom of the inner side of the outer tube. Multiple condensation pipes (704) are inserted between the two insertion tube fixing plates. A baffle plate is fixed to the bottom of the insertion tube fixing plate at the bottom of the inner wall of the outer tube. The two insertion tube fixing plates and all the condensation pipes (704) are connected together. The outer cylinder tube is connected to the upper and lower ends of the condensing component with cooling water pipes (701) respectively. The inner wall of the outer cylinder tube is located in the middle of the condensing component and has an S-shaped channel. A folded pipe (703) for ventilation is also provided between the two outer cylinder tubes to condense the gas that has not been completely condensed by the first condenser (7) again. The upper surface of the outer wall of the outer cylinder tube near the lowermost insertion plate is connected to a return flow converging pipe (702). The bottom end of the return flow converging pipe (702) is connected to the liquid storage tank (6).
10. A method for low-temperature extraction of herbal medicines, using a low-temperature extraction and concentrator for herbal medicines as described in claim 9, characterized in that... This includes the following steps: S1: Before adding the liquid medicine to the two feed pipes (26), close all valves directly connected to the tank body to ensure that the interiors of heater one (18), heater two (11), first-effect concentrator (14) and second-effect concentrator (9) are sealed. Then start the two water ring vacuum pumps (4) to perform vacuuming. Then ensure that the oil level of the heat transfer oil in the concentric oil tank (27) is in the middle position of the filling pipe (271). S2: Then add the medicine solution. The height of the medicine solution should be above the top of the concentric oil tank (27) and the liquid level should be below the bottom of the inclined insertion hole (24). Then, start the two electric heater groups (17) to heat the heat transfer oil in the two concentric oil tanks (27). After the medicine solution in heater one (18) boils, the generated high-temperature steam will enter the gas equalization plate (29) in heater two (11) through the steam delivery pipe (12). Then, it will be sprayed out from the bottom of the one-way gas outlet valve (28) to heat the medicine solution in the double-effect concentrator (9). The steam generated will then enter the condenser (7) for condensation and recovery for later use. S3: By observing through the observation window (21) and measuring with the concentration meter, once the liquid in the first-effect concentrator (14) and the second-effect concentrator (9) reaches the predetermined concentration, it can be collected through the discharge pipe (20). When the inside of the tank needs to be cleaned after multiple collections, just pump high-pressure water into the cleaning spray pipe (13), and with the multiple water-blocking bowls (33) on the outer wall of the cleaning rod (23), the cleaning rod (23) can be driven to brush and clean the inner wall of the tank under the action of water force. Finally, it is discharged from the slag discharge section (22).