Stirring device of spice extraction tank

Abstract

The utility model discloses a stirring device of a spice extraction tank, which comprises a heat preservation barrel and a container upper sealing head arranged above the heat preservation barrel, the heat preservation barrel is sequentially provided with an inner barrel, a jacket barrel and heat preservation cotton from inside to outside, and the stirring device is arranged in the heat preservation barrel. Comprising a vertical stirring shaft and multiple layers of stirring blades arranged on the stirring shaft, the top end of the stirring shaft is connected with the container upper seal head through a bearing, the bottom end extends into the lower portion of the heat preservation barrel, the outer edges of the blades are in clearance fit with the inner wall of the inner barrel, and the top end of the stirring shaft extends out of the container upper seal head and is connected with a driving device. The multiple layers of paddles are uniformly arranged in the axial direction, adopt arc-shaped or spiral structures and are arranged obliquely relative to the shaft, and the adjacent layers are arranged in a staggered manner; and a guide cylinder with a through hole is arranged between the stirring shaft and the inner cylinder body. The utility model overcomes the problems of many stirring dead zones and easy scaling in the prior art, has good stirring, mixing, heat and mass transfer effects, improves the equipment performance, and is convenient to manufacture, install, clean and maintain.

Description

Technical Field

[0001] The utility model relates to the technical field of spice extraction equipment, in particular to a stirring device of a spice extraction tank. Background Art

[0002] The spice extraction tank is a kind of extraction equipment widely used in food, medicine, chemical industry and other industries to extract essential oils, flavors and other useful ingredients from natural plants. During the extraction process, the material and the solvent are fully contacted and mixed in the tank. Through the action of the stirring device, the mass transfer and heat transfer efficiency between the material and the solvent are improved, thereby achieving the purpose of extraction.

[0003] Most existing spice extraction tanks use frame-type stirring paddles or anchor-type stirring paddles, which have a dead zone in stirring, which easily causes uneven mixing of materials and solvents, affecting the extraction effect. At the same time, since heating is required during the extraction process, the inner wall of the tank is prone to scaling, resulting in a decrease in heat transfer efficiency and affecting equipment performance. In addition, the existing stirring device has a complex structure, is inconvenient to assemble and disassemble, and is difficult to clean and maintain, increasing production costs.

[0004] In order to solve the above problems, it is necessary to design a new type of spice extraction tank stirring device, which can not only achieve sufficient mixing of materials and solvents, but also prevent scaling on the inner wall of the tank, and at the same time has the characteristics of simple structure, easy assembly and disassembly, and easy cleaning and maintenance. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a stirring device for a spice extraction tank, which has good stirring and mixing effect, can effectively prevent scaling of the tank wall, improve heat transfer efficiency, and has a reasonable structure, is easy to manufacture and install, and can significantly improve the performance of the spice extraction device.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A stirring device for a spice extraction tank, the spice extraction tank comprises a heat-insulating cylinder and a container upper head arranged above the heat-insulating cylinder, the heat-insulating cylinder is provided with an inner cylinder, a jacket cylinder and heat-insulating cotton in sequence from the inside to the outside, a stirring device is arranged in the heat-insulating cylinder, comprising a vertical stirring shaft and a multi-layer stirring blade arranged on the stirring shaft, the top end of the stirring shaft is connected to the container upper head through a bearing, the bottom end extends to the lower part of the heat-insulating cylinder, the outer edge of the blade is in clearance with the inner wall of the inner cylinder, and the top end of the stirring shaft extends out of the container upper head and is connected to a driving device.

[0008] Preferably, the multiple layers of stirring blades are evenly arranged along the axial direction of the stirring shaft, with 2-4 blades arranged on each layer, and the blades on adjacent layers are staggered.

[0009] Preferably, the stirring blade has an arc-shaped or spiral structure and is arranged obliquely with respect to the stirring shaft. The angle between the stirring blade and the stirring shaft is 35°-55°.

[0010] Preferably, a guide tube is provided between the stirring shaft and the inner cylinder. The guide tube is a hollow cylinder with an inner diameter larger than the diameter of the stirring shaft and smaller than the inner diameter of the inner cylinder. The guide tube has a plurality of through holes along the axial direction.

[0011] Preferably, the driving device is a reduction motor, and the reduction motor is connected to the stirring shaft.

[0012] Preferably, a reinforcement ring is provided between the inner cylinder and the jacket cylinder, an ear seat is provided on the upper part of the outer wall of the inner cylinder, and a nameplate and a nameplate support are provided on the upper part of the ear seat.

[0013] Preferably, a container bottom head is provided at the lower part of the insulation cylinder, and a slag discharge door is provided at the lower part of the container bottom head; the container upper head is detachably connected to the insulation cylinder through a flange, a gasket, a stud and a nut; a connecting pipe connected to the inside of the insulation cylinder is provided on the container upper head.

[0014] The beneficial effects of the utility model include:

[0015] (1) The stirring device for the spice extraction tank provided by the utility model adopts multiple layers of stirring blades evenly distributed on the stirring shaft, and adjacent layers of blades are staggered, which effectively eliminates the stirring dead zone, improves the mixing uniformity of the material and the solvent, and significantly improves the extraction effect.

[0016] (2) The stirring blade adopts an arc or spiral structure and is set at an angle to the stirring shaft. The angle between the blade and the shaft is controlled between 35° and 55°, which increases the stirring range and intensity, further enhances the stirring effect, and ensures that the materials are fully mixed.

[0017] (3) A guide tube is arranged between the stirring shaft and the inner cylinder. The guide tube has multiple through holes. The guide tube can guide the material to form a circulation with the stirring on the stirring shaft, strengthen the convective heat transfer in the cylinder, prevent the material from scaling on the tank wall, and maintain the efficient and stable operation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of a stirring device of a spice extraction tank in Example 1;

[0019] Figure 2 for Figure 1 The enlarged view of point a in the middle;

[0020] Figure 3 for Figure 1 Enlarged view of point b in the middle.

[0021] The above-mentioned figure marks are: 1. tank body; 2. upper head of container; 3. slag discharge door; 4. bottom head of container; 5. insulation cylinder; 6. jacket cylinder; 7. reinforcement ring; 8. insulation cotton; 9. inner cylinder; 10. ear seat; 11. nameplate; 12. flange; 13. gasket; 14. stud; 15. nut; 16. connecting pipe; 17. stirring shaft; 18. stirring blade; 19. bearing; 20. reduction motor; 21. guide tube; 22. through hole. DETAILED DESCRIPTION

[0022] The present invention is further described below in conjunction with the accompanying drawings and examples, but these specific implementation schemes do not limit the protection scope of the present invention in any way.

[0023] Example 1

[0024] like Figure 1-2 As shown, a stirring device for a spice extraction tank comprises a heat preservation cylinder 5 and a container upper head 2 arranged above the heat preservation cylinder 5. The heat preservation cylinder 5 is provided with an inner cylinder 9, a jacket cylinder 6 and heat insulation cotton 8 in sequence from the inside to the outside. A stirring device is arranged in the heat preservation cylinder 5, comprising a vertical stirring shaft 17 and a multi-layer stirring blade 18 arranged on the stirring shaft 17.

[0025] Specifically, the top end of the stirring shaft 17 is connected to the upper head 2 of the container through the bearing 19, and the bottom end is inserted into the lower part of the heat preservation cylinder 5. The outer edge of the paddle 18 maintains a clearance of 2-5 mm with the inner wall of the inner cylinder 9. The top end of the stirring shaft 17 extends out of the upper head 2 of the container and is connected to the driving device, which adopts a reduction motor 20 with a power of 1.5 kW and an output speed of 35 rpm.

[0026] Furthermore, multiple layers of stirring blades 18 are evenly arranged along the axial direction of the stirring shaft 17. In this embodiment, three layers are arranged, and each layer has three blades, which are formed by stamping and bending stainless steel plates. The adjacent layers of blades are staggered at 60 degrees.

[0027] Furthermore, the stirring blade 18 has a spiral structure, a length of 400 mm, a width of 150 mm, a thickness of 4 mm, and is tilted relative to the stirring shaft 17, with an angle of 45° between the two.

[0028] In this embodiment, a guide tube 21 is arranged between the stirring shaft 17 and the inner cylinder 9. The guide tube 21 is a hollow cylinder with an inner diameter larger than the diameter of the stirring shaft 17 and smaller than the inner diameter of the inner cylinder 9. The guide tube 21 has 8 elliptical through holes 22 evenly arranged along the axial direction.

[0029] A heating jacket is also provided in the heat preservation cylinder 5, the jacket cylinder 6 is located between the inner cylinder 9 and the heat preservation cotton 8, and a reinforcement ring 7 is welded between the inner cylinder 9 and the jacket cylinder 6. An ear seat 10 is provided on the upper part of the outer wall of the inner cylinder 9, and a nameplate 11 and a nameplate support are provided on the upper part of the ear seat 10.

[0030] A container bottom end cap 4 is provided at the lower part of the heat preservation cylinder 5, and a slag discharge door 3 is provided at the lower center of the container bottom end cap 4. The container upper end cap 2 is detachably connected to the heat preservation cylinder 5 through a flange 12, a gasket 13, a stud 14 and a nut 15. A pipe 16 communicating with the inside of the heat preservation cylinder 5 is provided on the container upper end cap 2, and the pipe 16 is used to connect to external high-temperature steam delivery.

[0031] During operation, materials and solvents are added into the tank, and the material level is above the top of the guide tube 21. Then the reduction motor 20 is started to drive the stirring shaft 17 and the stirring blades 18 to rotate. When the reduction motor 20 drives the stirring shaft 17 and the stirring blades 18 to rotate, the stirring blades 18 will produce stirring effects in two directions: one is circumferential, that is, rotating around the stirring shaft 17; the other is axial, that is, pushing the material flow along the direction of the stirring shaft 17 (up and down directions). Under this double stirring effect, the material at the upper part will be pushed downward by the stirring blades 18.

[0032] When the material is pushed to the top of the guide cylinder 21, the material will enter the annular flow channel between the guide cylinder 21 and the inner cylinder 9 because the material liquid level is below the top of the guide cylinder 21 and blocks the way. Then, the material will continue to flow downward in this annular flow channel. However, many through holes 22 are opened on the wall of the guide cylinder 21. When the material flows to the position of the through holes 22, it will enter the interior of the guide cylinder 21 through these through holes 22.

[0033] Once entering the interior of the guide tube 21, due to the squeezing of the internal material and the stirring of the stirring blades 18, the material will flow upward again under the action of the stirring shaft 17 and the stirring blades 18. Specifically, because the material is continuous in the entire tank, when the stirring blades 18 continuously push the upper material downward, in order to maintain the continuity of the material, the material inside the guide tube 21 must flow upward to replenish the position of the upper material, just like a circulating pump, the upper material is pumped away, and the lower material will be sucked up. This circulation process will be repeated continuously, so that the material in the entire tank is fully mixed and stirred, thereby strengthening the mass transfer effect between the material and the solvent and improving the extraction efficiency.

[0034] At the same time, the jacketed cylinder 6 is heated and the heat-insulating cylinder 5 is insulated. After the extraction is completed, the extract is extracted and the residue is discharged through the slag discharge door 3, and then the extract is subjected to subsequent treatments such as condensation and distillation.

[0035] The stirring device for the spice extraction tank of this embodiment adopts a rationally designed multi-layer blade and guide tube, which can fully stir the material with the stirring blade, strengthen heat and mass transfer, and overcome the problems of many stirring dead zones and serious scaling in the existing equipment. At the same time, through the optimization of the cylinder structure and the driving mode, the extraction effect is guaranteed, and the manufacturing, installation, cleaning and maintenance are convenient, which can significantly improve the performance and availability of the spice extraction equipment.

[0036] The above shows and describes the basic principles, main features and advantages of the invention. Those skilled in the art should understand that the invention is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the invention. Without departing from the spirit and scope of the invention, the invention may be subject to various changes and modifications, and these changes and modifications fall within the scope of the invention claimed for protection.

Claims

1. A stirring device for a spice extraction tank, the spice extraction tank comprises a heat-insulating cylinder and a container upper head arranged above the heat-insulating cylinder, the heat-insulating cylinder is provided with an inner cylinder, a jacket cylinder and heat-insulating cotton in sequence from the inside to the outside; characterized in that: A stirring device is arranged in the insulation cylinder, including a vertical stirring shaft and a multi-layer stirring blade arranged on the stirring shaft. The top end of the stirring shaft is connected to the upper head of the container through a bearing, and the bottom end extends into the lower part of the insulation cylinder. The outer edge of the blade is gap-matched with the inner wall of the inner cylinder, and the top end of the stirring shaft extends out of the upper head of the container and is connected to the driving device.

2. The stirring device for the spice extraction tank according to claim 1, characterized in that: The multiple layers of stirring blades are evenly arranged along the axial direction of the stirring shaft, with 2-4 blades arranged on each layer, and the blades on adjacent layers are staggered.

3. The stirring device of the spice extraction tank according to claim 2, characterized in that: The stirring blade adopts an arc-shaped or spiral structure and is arranged obliquely with the stirring shaft. The angle between the stirring blade and the stirring shaft is 35°-55°.

4. The stirring device for the spice extraction tank according to claim 3, characterized in that: A guide tube is arranged between the stirring shaft and the inner cylinder. The guide tube is a hollow cylinder with an inner diameter larger than the diameter of the stirring shaft and smaller than the inner diameter of the inner cylinder. The guide tube is provided with a plurality of through holes along the axial direction.

5. The stirring device for the spice extraction tank according to claim 1, characterized in that: The driving device is a reduction motor, and the reduction motor is connected to the stirring shaft.

6. The stirring device for the spice extraction tank according to claim 1, characterized in that: A reinforcing ring is arranged between the inner cylinder and the jacket cylinder, an ear seat is arranged on the upper part of the outer wall of the inner cylinder, and a nameplate and a nameplate support seat are arranged on the upper part of the ear seat.

7. The stirring device for the spice extraction tank according to claim 1, characterized in that: A container bottom head is provided at the lower part of the insulation cylinder, and a slag discharge door is provided at the lower part of the container bottom head; the container upper head is detachably connected to the insulation cylinder through a flange, a gasket, a stud and a nut; a connecting pipe connected to the inside of the insulation cylinder is provided on the container upper head.

Images