Separation equipment for extracting high-purity nicotine in waste tobacco leaves

Abstract

The utility model relates to separation equipment for extracting high-purity nicotine in waste tobacco leaves, and effectively solves the problems that an existing supercritical fluid extraction device is relatively high in cost, relatively long in extraction time, poor in extraction effect and inconvenient to fully extract nicotine in the tobacco leaves. According to the separation equipment for extracting the high-purity nicotine in the waste tobacco leaves, through the arrangement of the cavity, the heating belt, the net barrel mechanism, the feeding mechanism, the stirring mechanism and the extraction mechanism, the cost can be reduced, the extraction environment temperature can be stably kept constant, normal extraction is guaranteed, supercritical fluid can wash the tobacco leaves in the net barrel mechanism through the feeding mechanism, and the nicotine extraction efficiency is improved. And the extraction mechanism at the bottom can enable the extraction agent to circularly wash the tobacco leaves in the net cylinder mechanisms, and the extraction agent is disturbed by matching with the stirring mechanism, so that the extraction agent can be fully mixed with the tobacco leaves in the net cylinder mechanisms, the nicotine extraction effect is greatly improved, and the use during nicotine extraction is more facilitated.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of nicotine extraction equipment, and specifically relates to a separation equipment for extracting high-purity nicotine in discarded tobacco leaves. BACKGROUND

[0002] A large amount of tobacco waste is produced in the process of producing tobacco. A large amount of nicotine, solanesol and other source fragrances are contained in the discarded tobacco. The traditional discarded tobacco treatment method not only causes resource waste and energy consumption, but also pollutes the environment.

[0003] Supercritical fluid extraction technology has many advantages, such as strong environmental protection, high selectivity, maintenance of the activity of heat-sensitive substances, no residue, controllable recycling and practicability, and is particularly beneficial to the extraction of medicines or natural products in natural plants. Supercritical fluid extraction is the most advanced physical extraction technology in the world. When the pressure of a gas is continuously increased at a low temperature, the gas will be converted into a liquid. When the pressure is increased, the volume of the liquid is increased. For a particular substance, there is a critical temperature and a critical pressure above which the substance will not become a liquid or a gas. This is the critical point. In the range above the critical point, the state of the substance is between gas and liquid. The fluid in this range is a supercritical fluid. Supercritical fluid has strong penetration similar to gas and large density and solubility similar to liquid, has good solvent properties, can be used as a solvent for extraction and separation of monomers, and therefore has good effect on the extraction of nicotine in discarded tobacco leaves.

[0004] However, the existing supercritical fluid extraction device needs a cost-high temperature control system, and the cost of nicotine extraction is high. At present, when the supercritical fluid device extracts nicotine in tobacco leaves, the extractant and the sample cannot be fully mixed, a long extraction time is needed, the extraction effect is not good, it is not convenient to fully extract nicotine in tobacco leaves, and resource waste is easily caused. UTILITY MODEL CONTENT

[0005] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a separation equipment for extracting high-purity nicotine in discarded tobacco leaves. The separation equipment for extracting high-purity nicotine in discarded tobacco leaves can reduce the cost, stably maintain the constant extraction environment temperature, ensure the normal extraction, fully mix the extractant and the tobacco leaves in each mesh tube mechanism, fully extract the nicotine in discarded tobacco leaves, greatly improve the extraction effect of nicotine, and be more beneficial to the extraction of nicotine.

[0006] The utility model provides a kind of separation equipment for extracting high-purity nicotine in waste tobacco, including outer cylinder and inner cylinder, the inner cylinder is fixedly installed in the inside of outer cylinder and forms a closed cavity between both, the outside of outer cylinder is fixedly installed with heating band that can be heated in its inside, the upper surface of outer cylinder is provided with the mesh tube mechanism for containing tobacco, and the mesh tube mechanism is provided in the inside of inner cylinder, the middle part of the upper surface of outer cylinder is fixedly connected with the feeding mechanism that can inject supercritical fluid into the inside of inner cylinder, and the feeding mechanism is communicated with the inside of inner cylinder, the central part of the inside of inner cylinder is provided with the stirring mechanism that can disturb supercritical fluid, the inner bottom wall of inner cylinder is provided with the extraction mechanism, and the liquid outlet end of extraction mechanism is communicated with feeding mechanism.

[0007] Preferably, the bottom of the inner cylinder is fixedly connected with a discharge pipe in communication with its inside, and the discharge pipe is provided through the lower surface of the outer cylinder; the bottom of the outer cylinder is fixedly connected with a drain pipe in communication with the inside of the cavity; electromagnetic valves are installed on the sides of the discharge pipe and the drain pipe; the top of the outer cylinder is fixedly installed with a liquid inlet pipe in communication with the cavity; and one-way valves are installed in the interiors of the liquid inlet pipe and the feeding structure.

[0008] Preferably, the mesh tube mechanism includes a cover, a gasket and a mesh tube; the gasket is bonded to the lower surface of the cover, and the mesh tube is threadedly connected to the bottom end of the cover; the mesh tube is vertically provided through the inside of the inner cylinder; the number of the mesh tube mechanisms is several, and the several mesh tube mechanisms are inserted in an annular array on the upper surface of the outer cylinder and are all provided through the inside of the inner cylinder.

[0009] Preferably, the feeding mechanism includes a feeding pipe, a storage pipe and inclined pipes; the feeding pipe is fixedly connected to the circumcenter of the upper surfaces of the outer cylinder and the inner cylinder; the storage pipe is fixedly connected to the bottom end of the feeding pipe and is provided in the inside of the inner cylinder; the number of the inclined pipes is the same as that of the mesh tube mechanisms, and the several inclined pipes are fixedly connected in an annular array around the storage pipe; the interiors of the several inclined pipes are all communicated with the inside of the storage pipe, and the storage pipe is communicated with the feeding pipe.

[0010] Preferably, the stirring mechanism includes a driving motor and a stirring shaft; the stirring shaft is connected to the driving shaft of the driving motor through a spline and is vertically provided through the inside of the inner cylinder; the driving motor is fixedly installed at the circumcenter of the lower surface of the outer cylinder; and the stirring shaft vertically corresponds to the feeding mechanism.

[0011] Preferably, the extraction mechanism includes a pump body and a communication pipe; the pump body is fixedly installed on the inner bottom wall of the inner cylinder, and the communication pipe is communicated with the liquid outlet end of the pump body; the communication pipe is bonded to the inner side wall of the inner cylinder, and the top end is communicated with the feeding pipe.

[0012] The above technical solution has the following beneficial effects:

[0013] This separation equipment for extracting high-purity nicotine from waste tobacco leaves utilizes a cavity, heating belt, mesh cylinder mechanism, feeding mechanism, stirring mechanism, and extraction mechanism. Liquid is injected into the cavity to enclose the inner cylinder, ensuring a constant temperature within the inner cylinder. This temperature can be maintained by either circulating the constant-temperature liquid into the cavity or by heating the liquid within the cavity using the heating belt. This reduces costs and maintains a stable extraction environment temperature, ensuring proper extraction. Supercritical fluid enters the inner cylinder through the feeding mechanism and flows to the surrounding mesh cylinder mechanisms, flushing the tobacco leaves within them. The extraction mechanism at the bottom draws out the extractant from the inner cylinder and circulates it out through the feeding mechanism, further flushing the tobacco leaves within the mesh cylinder mechanisms. Combined with the stirring mechanism, this agitates the extractant, ensuring thorough mixing between the extractant and the tobacco leaves in each mesh cylinder mechanism. This maximizes the extraction efficiency of nicotine from the waste tobacco leaves, significantly improving its effectiveness and making it more suitable for nicotine extraction. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the disassembled state of the mesh cylinder mechanism of this utility model;

[0016] Figure 3 This is a schematic diagram of the internal structure of the outer cylinder and inner cylinder of this utility model;

[0017] Figure 4 This is a schematic diagram of the stirring mechanism and the extraction mechanism of this utility model;

[0018] Figure 5 This is a schematic cross-sectional view of the outer and inner cylinders of this utility model;

[0019] Figure 6 This is a schematic diagram of the feeding mechanism of this utility model;

[0020] Figure 7 This is a schematic diagram of the disassembled state of the mesh cylinder structure of this utility model.

[0021] In the diagram: 1. Outer cylinder; 2. Inner cylinder; 3. Cavity; 4. Heating belt; 5. Discharge pipe; 6. Liquid discharge pipe; 7. Solenoid valve; 8. Liquid inlet pipe; 9. Check valve; 10. Cover; 11. Sealing gasket; 12. Mesh cylinder; 13. Feed pipe; 14. Storage pipe; 15. Inclined pipe; 16. Drive motor; 17. Stirring shaft; 18. Pump body; 19. Connecting pipe. Detailed Implementation

[0022] The foregoing and other technical contents, features and effects of this utility model are described in conjunction with the appendix below. Figures 1 to 7 The embodiments are described in detail below.

[0023] The embodiment provides a separation device for extracting high-purity nicotine from waste tobacco leaves, as shown in the accompanying drawings. Figures 1-7 As shown, the outer cylinder 1 is fixedly provided with support legs for supporting the outer cylinder 1 at the bottom, and the inner cylinder 2 is fixedly arranged in the inner cylinder 1 to form a closed cavity 3 therebetween. Liquid can be injected into the cavity 3 or flow in the cavity 3 after being heated to a suitable supercritical extraction temperature, so as to ensure the constant temperature in the inner cylinder 2. The outer surface of the outer cylinder 1 is fixedly provided with a thermometer for monitoring the temperature of the liquid in the cavity 3, so that the temperature in the cavity 3 can be monitored in real time and adjusted in time. The bottom of the inner cylinder 2 is fixedly connected with a discharge pipe 5 in communication with the inner cylinder 2, and the discharge pipe 5 is arranged on the lower surface of the outer cylinder 1. The discharge pipe 5 is used for discharging the extractant in the inner cylinder 2. The bottom of the outer cylinder 1 is fixedly connected with a liquid discharge pipe 6 in communication with the cavity 3. The liquid discharge pipe 6 is used for discharging the liquid in the cavity 3 and can also be used as a circulating pipeline. The side surfaces of the discharge pipe 5 and the liquid discharge pipe 6 are both provided with electromagnetic valves 7. The electromagnetic valves 7 are used for controlling the flow of the discharge pipe 5 and the liquid discharge pipe 6, respectively. The top of the outer cylinder 1 is fixedly provided with a liquid inlet pipe 8 in communication with the cavity 3. The liquid inlet pipe 8 is used for injecting liquid into the cavity 3. The inner surfaces of the liquid inlet pipe 8 and the feed pipe 13 are both provided with one-way valves 9. The one-way valves 9 are used for allowing the extractant to enter the inner cylinder 2 only through the feed pipe 13 and allowing the liquid to enter the cavity 3 only through the liquid inlet pipe 8, so as to prevent backflow.

[0024] The outer surface of the outer cylinder 1 is fixedly provided with heating bands 4 for heating the inner part of the outer cylinder 1. The number of the heating bands 4 is several, and the several heating bands 4 are equally spaced around the outer surface of the outer cylinder 1. The heating bands 4 are used for fully and uniformly heating the liquid in the cavity 3 between the outer cylinder 1 and the inner cylinder 2, and also for keeping the temperature of the liquid in the cavity 3 constant. Meanwhile, the liquid inlet pipe 8 and the liquid discharge pipe 6 are connected with an external circulating device to form a circulating loop. The liquid in the cavity 3 is constantly injected and flows, and the temperature of the liquid is constant, so that the temperature in the inner cylinder 2 reaches a suitable supercritical extraction temperature, and the temperature in the inner cylinder 2 is kept constant. This temperature control method can greatly reduce the cost.

[0025] The upper surface of the outer cylinder 1 is provided with a mesh tube mechanism for containing tobacco leaves, and the mesh tube mechanism is provided in the interior of the inner cylinder 2. The mesh tube mechanism comprises a cover 10, a sealing gasket 11 and a mesh tube 12. The sealing gasket 11 is bonded to the lower surface of the cover 10, and the mesh tube 12 is threadedly connected to the bottom end of the cover 10. The mesh tube 12 is vertically provided in the interior of the inner cylinder 2. The number of mesh tube mechanisms is several, and the several mesh tube mechanisms are inserted in the form of an annular array on the upper surface of the outer cylinder 1 and are all provided in the interior of the inner cylinder 2. The waste tobacco leaves that need to extract nicotine can be stored in the mesh tube 12, and a plurality of mesh tubes 12 are fixed in the interior of the inner cylinder 2 through the cover 10. The sealing gasket 11 can ensure the sealing of the connection part of the cover 10 to prevent the pressure in the inner cylinder 2 from changing.

[0026] The upper surface of the outer cylinder 1 is provided with a mesh tube mechanism for containing tobacco leaves, and the mesh tube mechanism is provided in the interior of the inner cylinder 2. The mesh tube mechanism comprises a cover 10, a sealing gasket 11 and a mesh tube 12. The sealing gasket 11 is bonded to the lower surface of the cover 10, and the mesh tube 12 is threadedly connected to the bottom end of the cover 10. The mesh tube 12 is vertically provided in the interior of the inner cylinder 2. The number of mesh tube mechanisms is several, and the several mesh tube mechanisms are inserted in the form of an annular array on the upper surface of the outer cylinder 1 and are all provided in the interior of the inner cylinder 2. The waste tobacco leaves that need to extract nicotine can be stored in the mesh tube 12, and a plurality of mesh tubes 12 are fixed in the interior of the inner cylinder 2 through the cover 10. The sealing gasket 11 can ensure the sealing of the connection part of the cover 10 to prevent the pressure in the inner cylinder 2 from changing.

[0027] The center part of the interior of the inner cylinder 2 is provided with a stirring mechanism that can disturb the supercritical fluid. The stirring mechanism comprises a driving motor 16 and a stirring shaft 17. The stirring shaft 17 is connected to the driving shaft of the driving motor 16 through a spline and is vertically provided in the interior of the inner cylinder 2. The driving motor 16 is fixedly installed at the center of the lower surface of the outer cylinder 1. The stirring shaft 17 vertically corresponds to the feeding mechanism. The driving motor 16 drives the stirring shaft 17 to stir the extractant in the inner cylinder 2, so that the extractant and the tobacco leaves in each mesh tube 12 are more fully mixed, thereby improving the extraction effect.

[0028] The inner bottom wall of the inner cylinder 2 is provided with a pumping mechanism, and the liquid outlet of the pumping mechanism is communicated with the feeding mechanism. The pumping mechanism comprises a pump body 18 and a communicating pipe 19. The pump body 18 is fixedly installed on the inner bottom wall of the inner cylinder 2, and the communicating pipe 19 is communicated with the liquid outlet of the pump body 18. The communicating pipe 19 is bonded on the inner side wall of the inner cylinder 2 and communicated with the feeding pipe 13 at the top end. The pump body 18 can pump the extractant at the bottom of the inner cylinder 2 and re-inject it into the feeding pipe 13 through the communicating pipe 19, so that the extractant flows to the corresponding mesh cylinder 12 through each inclined pipe 15 again, so as to repeatedly flush and soak the tobacco leaves by the extractant, thereby more fully extracting the nicotine in the tobacco leaves, improving the purity of the extracted nicotine, and effectively avoiding the waste of nicotine.

[0029] The heating belt 4, the electromagnetic valve 7, the driving motor 16 and the pump body 18 are electrically connected with the external control unit and are electrically connected with the external circuit through wires.

[0030] In summary, the separation equipment for extracting high-purity nicotine from waste tobacco leaves is used as follows:

[0031] 1. First, store the waste tobacco leaves in the plurality of mesh cylinders 12, connect the mesh cylinder 12 with the cover 10, and fix the plurality of covers 10 on the upper surface of the outer cylinder 1 through bolts, so that the plurality of mesh cylinders 12 containing tobacco leaves are placed in the inner cylinder 2;

[0032] 2. Control the electromagnetic valve 7 on the discharge pipe 5 to be closed, apply appropriate pressure to the inner cylinder 2 through an external pressure control device, inject a heatable liquid into the cavity 3 through the liquid inlet pipe 8 and fill the cavity 3, keep the external heating belt 4 at a suitable temperature for extraction, heat the liquid in the cavity 3, and after the overall temperature of the liquid reaches a suitable value, inject the extractant into the inner cylinder 2 through the feeding pipe 13;

[0033] 3. The extractant will flush the tobacco leaves in the surrounding mesh cylinders 12 under the guidance of the inclined pipes 15, thereby extracting the nicotine in the tobacco leaves. Meanwhile, the driving motor 16 at the bottom drives the stirring shaft 17 to rotate, agitates the extractant in the inner cylinder 2, so that the extractant can more fully contact with the tobacco leaves. The pump body 18 at the bottom of the inner cylinder 2 can pump the extractant in the inner cylinder 2 and make it flow out from the top inclined pipe 15 through the communicating pipe 19, so as to repeatedly flush and soak the tobacco leaves by the extractant, thereby more fully extracting the nicotine in the tobacco leaves.

[0034] The above is only for the purpose of illustrating the present application, and it should be understood that the present application is not limited to the above embodiments, and various modifications in accordance with the idea of the present application are within the scope of protection of the present application.

Claims

1. A separation device for extracting high-purity nicotine from waste tobacco leaves, comprising an outer cylinder (1) and an inner cylinder (2), characterized in that: The inner cylinder (2) is fixedly installed inside the outer cylinder (1) and a sealed cavity (3) is formed between them. A heating belt (4) that can heat the inside of the outer cylinder (1) is fixedly installed on the outside of the outer cylinder (1). A mesh cylinder mechanism for holding tobacco leaves is passed through the upper surface of the outer cylinder (1) and the mesh cylinder mechanism is passed through the inside of the inner cylinder (2). A feeding mechanism that can inject supercritical fluid into the inner cylinder (2) is fixedly connected to the middle of the upper surface of the outer cylinder (1) and the feeding mechanism is connected to the inside of the inner cylinder (2). A stirring mechanism that can disturb the supercritical fluid is provided in the center of the inner cylinder (2). An extraction mechanism is provided on the inner bottom wall of the inner cylinder (2) and the liquid outlet end of the extraction mechanism is connected to the feeding mechanism.

2. The separation device for extracting high-purity nicotine from waste tobacco leaves according to claim 1, characterized in that: The bottom of the inner cylinder (2) is fixedly connected to a discharge pipe (5) that communicates with its interior, and the discharge pipe (5) passes through the lower surface of the outer cylinder (1). The bottom of the outer cylinder (1) is fixedly connected to a liquid discharge pipe (6) that communicates with the interior of the cavity (3). Solenoid valves (7) are installed on the sides of both the discharge pipe (5) and the liquid discharge pipe (6). The top of the outer cylinder (1) is fixedly installed with an inlet pipe (8) that communicates with the cavity (3). One-way valves (9) are installed inside both the inlet pipe (8) and the feeding structure.

3. The separation device for extracting high-purity nicotine from waste tobacco leaves according to claim 1, characterized in that: The mesh cylinder mechanism includes a cap (10), a sealing gasket (11), and a mesh cylinder (12). The sealing gasket (11) is bonded to the lower surface of the cap (10), and the mesh cylinder (12) is threaded to the bottom end of the cap (10). The mesh cylinder (12) is vertically inserted inside the inner cylinder (2). The mesh cylinder mechanism consists of several mesh cylinders, which are inserted into the upper surface of the outer cylinder (1) in a circular array and are all inserted inside the inner cylinder (2).

4. The separation device for extracting high-purity nicotine from waste tobacco leaves according to claim 1, characterized in that: The feeding mechanism includes a feeding pipe (13), a storage pipe (14), and inclined pipes (15). The feeding pipe (13) is fixedly connected to the center of the upper surface of the outer cylinder (1) and the inner cylinder (2). The storage pipe (14) is fixedly connected to the bottom end of the feeding pipe (13) and is located inside the inner cylinder (2). The number of inclined pipes (15) is the same as the number of mesh cylinder mechanisms, and several inclined pipes (15) are fixedly connected around the storage pipe (14) in a ring array. Several inclined pipes (15) are all connected to the inside of the storage pipe (14), and the storage pipe (14) is connected to the feeding pipe (13).

5. The separation device for extracting high-purity nicotine from waste tobacco leaves according to claim 1, characterized in that: The stirring mechanism includes a drive motor (16) and a stirring shaft (17). The stirring shaft (17) is connected to the drive shaft of the drive motor (16) by a spline and is vertically inserted inside the inner cylinder (2). The drive motor (16) is fixedly installed at the center of the lower surface of the outer cylinder (1). The stirring shaft (17) is vertically corresponding to the feeding mechanism.

6. The separation device for extracting high-purity nicotine from waste tobacco leaves according to claim 4, characterized in that: The extraction mechanism includes a pump body (18) and a connecting pipe (19). The pump body (18) is fixedly installed on the inner bottom wall of the inner cylinder (2) and the connecting pipe (19) is connected to the liquid outlet end of the pump body (18). The connecting pipe (19) is bonded to the inner side wall of the inner cylinder (2) and its top end is connected to the feed pipe (13).

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