Supercritical fluid extraction kettle

Abstract

The utility model relates to the technical field of solvent extraction, in particular to a supercritical fluid extraction kettle which comprises a kettle body, a liquid spraying structure is arranged on the kettle body, and the liquid spraying structure comprises an atomizing nozzle extending into an inner cavity of the kettle body. The atomizing nozzle is provided with a liquid inlet for liquid materials to be extracted to enter and a liquid outlet for spraying the liquid materials in the inner cavity of the kettle body, the liquid materials are atomized and sprayed out after entering the atomizing nozzle of the liquid spraying structure, and the liquid materials are dispersed by utilizing the space of the inner cavity of the kettle body; and the contact area between the liquid material and the supercritical fluid in the kettle body is increased, so that the liquid material can be fully contacted with the supercritical fluid, and effective extraction can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of solvent extraction, in particular to a supercritical fluid extraction kettle. Background Art

[0002] Supercritical fluid is a fluid above the critical temperature and critical pressure. It has no obvious gas-liquid boundary and is neither liquid nor gas. It is very sensitive to changes in temperature and pressure. Supercritical fluid has a density similar to that of liquid, and has the characteristics of high viscosity and diffusion coefficient similar to that of gas. It has strong fluidity, solubility and transfer properties, and is an ideal extractant. Supercritical fluid extraction technology uses supercritical fluid as an extractant to extract specific components from liquids or solids to achieve separation purposes.

[0003] Supercritical fluid extraction is generally carried out in an extraction kettle. The basic structure of an existing extraction kettle can be seen in the supercritical extraction reaction kettle disclosed in the Chinese utility model patent with the authorization announcement number CN211487624U. The upper part of the kettle body is provided with a liquid inlet pipe, the lower part of the kettle body is provided with a liquid outlet pipe, and the upper end of the kettle body is provided with a sealing end cover, which can allow supercritical fluid to enter the kettle body through the liquid inlet pipe, extract the material in the kettle body, and then flow out from the liquid outlet pipe.

[0004] The conventional supercritical fluid extraction kettle mentioned above is mostly used to extract solid materials. For liquid materials, such as flavor solutions, especially liquid materials with high viscosity, when the supercritical fluid is introduced into the kettle body to extract the liquid, the contact area between the supercritical fluid and the liquid is very limited, the extraction efficiency is low, and effective extraction cannot be achieved. Utility Model Content

[0005] The utility model aims to provide a supercritical fluid extraction kettle to solve the problem of low efficiency of the current supercritical fluid extraction kettle when extracting liquid materials due to the limited contact area between the supercritical fluid and the liquid.

[0006] The technical solution of the supercritical fluid extraction kettle of the utility model is:

[0007] A supercritical fluid extraction kettle comprises a kettle body, on which a liquid spraying structure is arranged, the liquid spraying structure comprises an atomizing nozzle extending into the inner cavity of the kettle body, the atomizing nozzle having a liquid inlet for liquid material to be extracted to enter and a liquid outlet for spraying the liquid material into the inner cavity of the kettle body.

[0008] Furthermore, the liquid outlet is located at the upper part of the inner cavity of the kettle body and is arranged downward.

[0009] Furthermore, the kettle body comprises a top wall, the lower side surface of the top wall constitutes the cavity top surface of the inner cavity of the kettle body, and the atomizing nozzle is arranged on the top wall.

[0010] Furthermore, the liquid spraying structure includes a liquid inlet channel which is arranged on the top wall and passes through from top to bottom, and the atomizing nozzle is connected to the inner channel opening of the liquid inlet channel.

[0011] Furthermore, a liquid inlet joint is connected to the outer channel opening of the liquid inlet channel.

[0012] Furthermore, an openable end cover is provided at the upper end of the kettle body, and the end cover constitutes the top wall.

[0013] Further, the atomizing nozzle is arranged at the center of the top wall.

[0014] Furthermore, the kettle body is provided with a fluid inlet hole for supercritical fluid to enter the inner cavity of the kettle body and a fluid outlet hole for supercritical fluid to discharge the extract. The fluid outlet hole is arranged at the upper end of the kettle body, and the fluid inlet hole is arranged at the lower end of the kettle body.

[0015] Further, the position of the fluid discharge hole is higher than the position of the liquid outlet.

[0016] Furthermore, a raffinate discharge hole is provided at the lower end of the kettle body.

[0017] Beneficial effects: The utility model is improved on the basis of the supercritical fluid extraction kettle in the prior art. A liquid spraying structure is arranged on the kettle body. After the liquid material enters the atomizing nozzle of the liquid spraying structure, the liquid material is atomized and sprayed out. The inner cavity space of the kettle body is utilized to disperse the liquid material, thereby increasing the contact area between the liquid material and the supercritical fluid in the kettle body, which is beneficial to the full contact between the liquid material and the supercritical fluid, improves the extraction efficiency, and realizes effective extraction. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of an embodiment of a supercritical fluid extraction kettle of the utility model;

[0019] Figure 2 for Figure 1 A vertical cross-sectional schematic diagram of a supercritical fluid extraction kettle;

[0020] Figure 3 for Figure 1 Schematic diagram of the installation structure of the end cover and atomizing nozzle of the supercritical fluid extraction kettle.

[0021] In the figure: 1. kettle body; 11. fluid inlet hole; 12. fluid discharge hole; 13. raffinate discharge hole; 2. end cover; 21. liquid inlet channel; 3. atomizing nozzle; 4. liquid inlet joint; 51. fluid inlet joint; 52. fluid outlet joint; 53. liquid discharge joint; 6. inner cavity of kettle body. DETAILED DESCRIPTION

[0022] The supercritical fluid extraction kettle of the utility model is provided with a liquid spraying structure on the kettle body. After the liquid material enters the atomizing nozzle of the liquid spraying structure, the liquid material is atomized and sprayed out. The inner cavity space of the kettle body is utilized to disperse the liquid material, thereby increasing the contact area between the liquid material and the supercritical fluid in the kettle body, which is beneficial for the liquid material to fully contact with the supercritical fluid, improves the extraction efficiency, and realizes effective extraction.

[0023] Embodiment of the supercritical fluid extraction kettle of the utility model:

[0024] like Figure 1 , Figure 2 , Figure 3 As shown, the supercritical fluid extraction kettle comprises a kettle body, which comprises a kettle body 1 and an end cover 2. The kettle body 1 is a cylindrical structure, and the kettle body 1 has a bottom and a mouth. The end cover 2 is installed at the mouth of the kettle body 1 to enclose the kettle body inner cavity 6 with the kettle body 1, and the center line of the kettle body extends in the up-down direction. A fluid inlet hole 11 is provided at the lower part of the kettle body 1. The fluid inlet hole 11 penetrates the cylinder wall of the kettle body 1 along the radial direction of the kettle body 1. The fluid inlet hole 11 is close to the bottom of the inner cavity 6 of the kettle body. The fluid inlet hole 11 is used for supercritical fluid to enter the inner cavity 6 of the kettle body. The supercritical fluid can be a supercritical carbon dioxide fluid. A fluid discharge hole 12 is provided at the upper part of the kettle body 1. The fluid discharge hole 12 penetrates the cylinder wall of the kettle body 1 along the radial direction of the kettle body 1. The position of the fluid discharge hole 12 is close to the end cover 2. The fluid discharge hole 12 is used for supercritical fluid to be discharged from the inner cavity 6 of the kettle body with the extracted substances. A fluid inlet connector 51 and a fluid outlet connector 52 are respectively provided at the fluid inlet hole 11 and the fluid outlet hole 12 for connection with corresponding fluid pipelines.

[0025] The supercritical fluid extraction kettle in this embodiment is used to extract liquid materials. The liquid materials are natural spices, including extracts, pure oils, tinctures and the like. The liquid viscosity is relatively high. In order to achieve effective extraction of the liquid materials, a liquid spray structure is provided on the kettle body. The liquid spray structure includes an atomizing nozzle 3 extending into the inner cavity 6 of the kettle body. The atomizing nozzle 3 has a liquid inlet for the liquid material to be extracted and a liquid outlet for spraying the liquid material into the inner cavity 6 of the kettle body. The atomizing nozzle 3 is used to atomize and spray the liquid material into the inner cavity 6 of the kettle body, thereby increasing the contact area between the liquid material and the supercritical fluid and improving the extraction efficiency.

[0026] The upper end of the kettle body is provided with an openable end cover 2, which constitutes the top wall of the kettle body, and the lower side of the top wall constitutes the top surface of the inner cavity 6 of the kettle body. The liquid spraying structure includes a liquid inlet channel 21 that is arranged on the end cover 2 and is connected from top to bottom. The liquid inlet channel 21 is arranged at the center of the top wall, and the atomizing nozzle 3 is connected to the inner channel opening of the liquid inlet channel 21. The outer channel opening of the liquid inlet channel 21 is connected to a liquid inlet connector 4, and the liquid inlet connector 4 is used to connect the corresponding pipeline for pumping liquid materials. The atomizing nozzle 3 is connected to the center of the end cover 2, and the liquid outlet is located in the upper space of the inner cavity 6 of the kettle body and is arranged downward. The position of the fluid discharge hole 12 is higher than the position of the liquid outlet. The liquid material flows to the liquid inlet channel 21 through the liquid inlet connector 4, and then enters the atomizing nozzle 3 through the liquid inlet of the atomizing nozzle 3, and then sprays out from the liquid outlet of the atomizing nozzle 3. The extraction kettle can be used continuously, and liquid materials are sprayed in the kettle body while the supercritical fluid is introduced.

[0027] A raffinate discharge hole 13 is also provided at the bottom of the kettle body, and a liquid discharge joint 53 is provided at the raffinate discharge hole 13. The liquid discharge joint 53 is used to connect a corresponding pipeline to discharge the raffinate in the kettle body.

[0028] In other embodiments, the atomizing nozzle may be disposed at a position close to the edge of the end cover, with the liquid outlet of the atomizing nozzle tilted downward.

[0029] In other embodiments, the liquid spray structure can also be configured to include an atomizing nozzle and a nozzle mounting hole arranged on the end cover, the atomizing nozzle is installed in the nozzle mounting hole and sealed, the liquid inlet of the atomizing nozzle extends out of the kettle body, and the liquid outlet is located in the kettle body.

[0030] In other embodiments, the top wall may also be a structure formed integrally with the kettle body, and the bottom of the kettle body is provided with an openable lower end cover.

[0031] In other embodiments, the atomizing nozzle may also be arranged on the circumferential side wall of the kettle body.

[0032] Finally, it should be noted that the above is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments without creative work, or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A supercritical fluid extraction kettle, comprising a kettle body, characterized in that: The kettle body is provided with a liquid spraying structure, which includes an atomizing nozzle extending into the inner cavity of the kettle body. The atomizing nozzle has a liquid inlet for the liquid material to be extracted to enter and a liquid outlet for spraying the liquid material into the inner cavity of the kettle body.

2. The supercritical fluid extraction kettle according to claim 1, characterized in that: The liquid outlet is located at the upper part of the inner cavity of the kettle body and is arranged downward.

3. The supercritical fluid extraction kettle according to claim 2, characterized in that: The kettle body comprises a top wall, the lower side surface of the top wall constitutes the cavity top surface of the inner cavity of the kettle body, and the atomizing nozzle is arranged on the top wall.

4. The supercritical fluid extraction kettle according to claim 3, characterized in that: The liquid spraying structure comprises a liquid inlet channel which is arranged on the top wall and passes through from top to bottom, and the atomizing nozzle is connected to the inner channel opening of the liquid inlet channel.

5. The supercritical fluid extraction kettle according to claim 4, characterized in that: The outer channel opening of the liquid inlet channel is connected with a liquid inlet joint.

6. The supercritical fluid extraction kettle according to claim 3, 4 or 5, characterized in that: An openable end cover is arranged at the upper end of the kettle body, and the end cover constitutes the top wall.

7. The supercritical fluid extraction kettle according to claim 3, 4 or 5, characterized in that: The atomizing nozzle is arranged at the center of the top wall.

8. The supercritical fluid extraction kettle according to any one of claims 1 to 5, characterized in that: The kettle body is provided with a fluid inlet hole for supercritical fluid to enter the inner cavity of the kettle body and a fluid discharge hole for supercritical fluid to discharge the extract. The fluid discharge hole is arranged at the upper end of the kettle body, and the fluid inlet hole is arranged at the lower end of the kettle body.

9. The supercritical fluid extraction kettle according to claim 8, characterized in that: The fluid discharge hole is located higher than the liquid outlet.

10. The supercritical fluid extraction kettle according to any one of claims 1 to 5, characterized in that: A raffinate discharge hole is provided at the lower end of the kettle body.

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