Device and method for extracting and distilling agilawood essential oil without heating by pressurizing

Abstract

An agilawood essential oil extracting and distilling device without temperature rising through pressurization comprises a distilling tank, an air supply device, a heating device, a condensing device and an oil-water separating device, a perforated plate is arranged at the bottom of the inner side of the distilling tank, and the distilling tank is provided with an air inlet, an air inlet pipe, a water inlet and a condensing opening. The other end extends downwards to the bottom along the inner side wall of the distillation retort and is positioned below the perforated plate; the heating device is arranged at the bottom of the distillation retort, the water inlet and the condensation opening are both formed in the top of the distillation retort, the condensation device is arranged on the condensation opening, and the oil-water separation device is connected to the condensation device. According to the method, low-temperature essential oil extraction can be achieved, energy consumption is reduced, the stability of thermosensitive components is improved, the cost is low, the oil yield is high, practicability is high, and the method has high popularization significance. In addition, the invention also discloses an agilawood essential oil extraction and distillation method without heating after pressurization.

Description

Technical Field

[0001] The present invention relates to a distillation device, and in particular to an agarwood essential oil extraction distillation device and an extraction distillation method that increase pressure without increasing temperature. Background Art

[0002] Agarwood essential oil is an essential oil product of extremely high value extracted from agarwood, and is commonly used in the cosmetics and pharmaceutical industries. Modern pharmacology believes that agarwood essential oil has the characteristics of antioxidant, antibacterial, anti-inflammatory, air purification, relaxation and sedation. At present, the conventional method for extracting agarwood essential oil is: high-temperature steam distillation. However, since most of the essential oil contains volatile heat-sensitive components (sesquiterpenoids), high temperature may damage the heat-sensitive components, and the extraction time is long (several hours to several days), and the yield is low (usually 0.5%-2%). In addition, high temperature may also cause degradation of some aroma components, and the obtained essential oil has a darker color (amber), and it is necessary to remove impurities and improve purity through aging (such as burial in an earth cellar), and the operation is complex and the required time is long. Summary of the Invention

[0003] Based on this, it is necessary to provide an agarwood essential oil extraction distillation device and an extraction distillation method that increase pressure without increasing temperature in view of the deficiencies in the prior art.

[0004] An agarwood essential oil extraction distillation device that increases pressure without increasing temperature, which includes a distillation tank, a gas supply device, a heating device, a condensation device, an oil-water separation device, a buffer tank and a reflux pump. A porous plate is provided at the inner bottom of the distillation tank, and an air inlet, an air inlet pipe, a water inlet and a condensation port are provided on the distillation tank. One end of the air inlet pipe is connected to the air inlet, and the other end extends downward along the inner wall of the distillation tank to the bottom and is located below the porous plate; the heating device is provided at the bottom of the distillation tank, the water inlet and the condensation port are both provided at the top of the distillation tank, the condensation device is installed on the condensation port, and the oil-water separation device is connected to the condensation device; the guiding part is arranged in a horn shape with a gradually increasing aperture from top to bottom; the condensation device includes a horizontal condensation device and a vertical condensation device. The horizontal condensation device is installed above the distillation tank and connected to the condensation port, and the vertical condensation device is connected to the horizontal condensation device; the buffer tank is connected to the vertical cooling and heating device; a reflux port is also provided on the distillation tank, and the reflux pump is connected to the buffer tank and the reflux port.

[0005] Further, the reflux port is arranged in an inclined extension structure with the outer side higher than the inner side, and its inner end extends below the porous plate.

[0006] Further, it also includes a filtering device, and the filtering device is connected to the oil-water separation device.

[0007] Further, a pressure regulating valve and a pressure gauge are also provided on the distillation tank.

[0008] Furthermore, a quick-opening manhole is also provided at the top of the distillation tank, and a sight glass is provided on the side of the quick-opening manhole.

[0009] Furthermore, a quick-opening handhole is also provided on the distillation tank, and the quick-opening handhole is arranged on the side and above the perforated plate.

[0010] Furthermore, a discharge port is also provided on the distillation tank. The inner bottom surface of the distillation tank is spherical, and the discharge port is arranged at the bottommost end.

[0011] Furthermore, the heating device includes a plurality of jackets arranged at the bottom of the distillation tank and electric heating wires extending into the jackets. Heat-conducting oil is provided in the jackets, and the electric heating wires generate heat to make the hot oil in the jackets reach the operating temperature to heat the bottom water inside into water vapor.

[0012] A method for extracting agarwood essential oil with pressure increase but no temperature rise. First, a distillation device is provided. The distillation device includes a distillation tank, a gas supply device, a heating device, a condensation device, an oil-water separation device, a buffer tank, and a reflux pump. A perforated plate is provided at the inner bottom of the distillation tank. An air inlet, an air inlet pipe, a water inlet, and a condensation port are provided on the distillation tank. One end of the air inlet pipe is connected to the air inlet, and the other end extends downward along the inner wall of the distillation tank to the bottom and is located below the perforated plate; the heating device is arranged at the bottom of the distillation tank, the water inlet and the condensation port are both arranged at the top of the distillation tank, the condensation device is installed on the condensation port, and the oil-water separation device is connected to the condensation device; the guiding part is arranged in a horn shape with a gradually increasing aperture from top to bottom; the condensation device includes a horizontal condensation device and a vertical condensation device. The horizontal condensation device is installed above the distillation tank and connected to the condensation port, and the vertical condensation device is connected to the horizontal condensation device; the buffer tank is connected to the vertical cooling and heating device; a reflux port is also provided on the distillation tank, and the reflux pump is connected to the buffer tank and the reflux port. Water is added into the distillation tank from the water inlet, and the agarwood is crushed and placed on the perforated plate; each opening of the distillation tank is closed, and high-purity pressurized gas is introduced into the distillation tank to discharge oxygen from the horizontal condensation device. After the inflation is completed, nitrogen supply is stopped. At the same time, the heating device is started to heat the agarwood raw material in the distillation tank; during the heating process, the heating rate is controlled to gradually increase the temperature to the extraction temperature; under the conditions of heating and pressurization, the essential oil components in the agarwood volatilize together with the water vapor to form a mixed vapor; the mixed vapor enters the horizontal condensation device and the vertical condensation device through the pipeline for secondary cooling and liquefaction to form a mixed liquid containing essential oil and water; the mixed liquid enters the buffer tank, and the reflux pump pumps the mixed liquid back into the distillation tank from the buffer tank for re-distillation. When the distillation reaches the required number of times, the mixed liquid in the buffer tank is further separated by the oil-water separation device.

[0013] Furthermore, the reflux port is arranged in an inclined extension structure with the outer side higher than the inner side, and its inner end extends below the perforated plate.

[0014] Further, it further includes a filtering device, and the filtering device is connected to the oil-water separation device.

[0015] Further, a pressure regulating valve and a pressure gauge are further provided on the distillation tank.

[0016] Further, a quick-opening manhole is further provided at the top of the distillation tank, and a sight glass is provided on the side of the quick-opening manhole.

[0017] Further, a quick-opening handhole is further provided on the distillation tank, and the quick-opening handhole is provided on the side and above the perforated plate.

[0018] Further, a discharge port is further provided on the distillation tank, the inner bottom surface of the distillation tank is spherical, and the discharge port is provided at the bottommost end.

[0019] Further, the heating device includes a plurality of jackets provided at the bottom of the distillation tank and electric heating wires extending into the jackets. Heat-conducting oil is provided in the jackets, and the electric heating wires generate heat to make the hot oil in the jackets reach the operating temperature to heat the bottom water inside into steam.

[0020] Further, the separated essential oil is stored in a storage tank, and is stored in a sealed and low-temperature manner with nitrogen filling and light avoidance.

[0021] In summary, the present invention can extract more low-volatility components (such as chromone, resin) at a lower temperature (such as 80-90 °C), reduce the decomposition of thermosensitive components, retain more thermosensitive aromatic substances, the aroma of the essential oil is fresher and more complex, and it can reach a higher purity without long-term aging. At the same time, the dissolution ability of the solvent (steam) is enhanced under high pressure, and the active substances in agarwood can be extracted more comprehensively. It not only retains the natural components of agarwood, but also improves the oil yield, reduces energy consumption, has a lower cost, and balances efficiency and cost. It has strong practicability and has strong popularization significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of the agarwood essential oil extraction and distillation device of the present invention with increased pressure without temperature rise;

[0023] Figure 2 is Figure 1 a schematic structural diagram of the distillation tank in

[0024] Figure 3 is Figure 2 a top view of the distillation tank in DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0026] As Figures 1 to 3 shown, the present invention provides a distillation device for extracting agarwood essential oil with pressurization but without temperature increase. The distillation device for extracting agarwood essential oil with pressurization but without temperature increase includes a distillation tank 10, a gas supply device 20, a heating device 30, a horizontal condensation device 40, a vertical condensation device 50, a buffer tank 60, a reflux pump 70, and an oil-water separation device (not shown in the figure).

[0027] The gas supply device 20 is connected to the distillation tank 10 to fill the distillation tank with an inert pressurized gas. In this embodiment, the pressurized gas is inlet air, which can create a stable environment, reduce oxidation, and retain active ingredients. It can be understood that the inert pressurized gas is not limited to inlet air, and can also be other gases of the same type. The heating device 30 is arranged at the bottom of the distillation tank 10 to perform dry distillation on the agarwood wood chips in the distillation tank 10. The horizontal condensation device 40 is arranged on the top of the distillation tank 10. The vertical condensation device 50 is connected to the condensation device 40. The buffer tank 60 is connected to the vertical condensation device 50 and is located below it. The reflux pump 70 is connected to the buffer tank 60 and the distillation tank 10. The oil-water separation device is connected to the buffer tank 60 to perform oil-water separation on the distilled mixed liquid.

[0028] A porous plate 11 is arranged in the distillation tank 10. A plurality of support blocks 111 are arranged on the inner surface of the distillation tank 10 below the porous plate 11. The porous plate 11 is erected on the plurality of support blocks 111. The distillation tank 10 is also provided with a condensation port 12, an air inlet 13, a reflux port 15, a quick-opening handhole 16, a quick-opening access hole 17, a water inlet 18, and a discharge port 19. The condensation port 12, the air inlet 13, the quick-opening access hole 17, and the water inlet 18 are arranged on the top of the distillation tank 10. The reflux port 15 and the quick-opening handhole 16 are arranged at the lower side position of the distillation tank 10. The discharge port 19 is arranged at the bottom end of the distillation tank 10. An air inlet pipe 14 is arranged on the inner wall of the distillation tank 10. The air inlet pipe 14 is connected to the air inlet 13, and the air inlet pipe 14 extends downward along the inner wall of the distillation tank 10 to the bottom and is located directly below the porous plate 11. In addition, a guiding portion 121 is arranged inside the condensation port 12. The guiding portion 121 is arranged in a horn shape with a gradually increasing aperture from top to bottom. The design of this structure enables the steam to directly rise along the side wall of the guiding portion 121 and be discharged from the condensation port 12 without circulating in the distillation tank 10, improving the oil yield and reducing the oil extraction time, which is more time-saving.

[0029] In this embodiment, the inner end of the reflux port 15 extends below the perforated plate 11. The quick-opening handhole 16 is provided corresponding to the upper part of the perforated plate 11 to facilitate the cleaning of the bottom materials. The quick-opening inlet hole 17 is provided at the top of the distillation tank 10, which is used for placing materials and cleaning materials. In addition, a sight glass 171 is provided on the side of the quick-opening inlet hole 17 for observing the materials in the tank. The discharge port is used to discharge the bottom materials, and the water inlet is used to add water for dry distillation.

[0030] The gas supply device 20 is connected to the air inlet 13, and the gas supply device 20 can be an air inlet bottle or a nitrogen generator. The horizontal condensing device 40 is arranged above the distillation tank 10, and the condensation port 12 is connected to the horizontal condensing device 40 through a pipeline. A mixed liquid outlet 41 is provided at the rear end of the horizontal condensing device 40, and the vertical condensing device 50 is arranged below the horizontal condensing device 40 and is connected to the mixed liquid outlet 41 through a pipeline. The buffer tank 60 is arranged below the vertical condensing device 50, and the buffer tank 60 is connected to the liquid outlet of the vertical condensing device 50 through a pipeline. The reflux pump 70 is connected to the buffer tank 60 and the reflux port 15. In addition, a pressure regulating valve and a pressure gauge are installed on the distillation device to accurately control and monitor the pressure in the distillation kettle.

[0031] The heating device 30 includes a plurality of jackets 31 and electric heating wires 32 extending into the jackets 31. Heat-conducting oil is provided in the jackets. The electric heating wires generate heat to make the hot oil in the jackets reach the operating temperature to heat the bottom water inside into steam. In addition, a filtering device (not shown in the figure) is also included. The filtering device uses a precision filter element or centrifugal separation to remove solid impurities. The collected crude agarwood essential oil is filtered to remove the solid impurities that may be contained therein, making the essential oil purer.

[0032] During operation, water is added into the distillation tank 10 from the water inlet 18, and the agarwood is crushed and placed on the porous plate 11. Each opening of the distillation tank 10 is closed, and high-purity inlet gas (purity ≥ 99.99%) is introduced into the distillation tank 10. Nitrogen is continuously filled for a period of time, and oxygen is discharged from the horizontal condensation device 40, so as to create a low-oxygen or oxygen-free environment in the distillation tank 10, preventing the agarwood components from being oxidized during the extraction process. After the nitrogen filling is completed, the nitrogen supply is stopped. At the same time, the heating device 30 is turned on to heat the agarwood raw material in the distillation tank 10. During the heating process, the heating rate is controlled to gradually increase the temperature to the extraction temperature (usually 60-80°C). Under the conditions of heating and pressurization, the essential oil components in the agarwood volatilize together with the water vapor to form a mixed vapor. The pressure of the inlet gas helps the water vapor to penetrate deeper into the agarwood raw material, accelerating the dissolution and volatilization of the essential oil. The mixed vapor enters the horizontal condensation device 40 and the vertical condensation device 50 through the pipeline, and is cooled and liquefied twice by the horizontal condensation device 40 and the vertical condensation device 50 to form a mixed liquid containing essential oil and water. The mixed liquid enters the buffer tank 60, and the reflux pump 70 pumps the mixed liquid back into the distillation tank 10 for re-distillation, so as to improve the purity and remove the odor. It can be understood that in order to improve the oil yield, the agarwood residue after extraction can also be extracted again. Repeat the above steps of nitrogen filling, pressurization, heating, condensation and separation, and generally 2-3 extractions can be carried out. When the purification is repeated to the required number of times, the mixed liquid in the buffer tank 60 is separated by an oil-water separation device, and the essential oil and water are collected separately.

[0033] The present invention uses pressurized gas for pressurized extraction and has the following advantages:

[0034] 1. Protect heat-sensitive components: Nitrogen is an inert gas with stable chemical properties and does not react chemically with the components in agarwood. During the pressurized extraction process, it can create a relatively stable environment, avoiding the degradation or deterioration of heat-sensitive components (such as certain sesquiterpenes and aromatic compounds) in agarwood due to oxidation and other reactions, better retaining the natural aroma components and active substances in agarwood essential oil, and improving the quality of the essential oil.

[0035] 2. Reduce the extraction temperature: By pressurizing with nitrogen, the boiling point of water vapor or other solvents can be increased, enabling the extraction process to be carried out at a relatively low temperature. The lower temperature helps to reduce the damage of heat-sensitive components, and at the same time can reduce energy consumption and improve the extraction efficiency. For example, in traditional steam distillation, about 100°C is required, while nitrogen pressurization may enable effective extraction to be completed at about 80°C.

[0036] 3. Anti-oxidation: Some components in agarwood are easily oxidized in the air, which affects the aroma and quality of the essential oil. Pressurizing with nitrogen can expel the air in the extraction device, reduce the oxygen content, form a low-oxygen or oxygen-free environment, effectively prevent the oxidation of agarwood components, extend the shelf life of agarwood essential oil, and maintain the purity and stability of its aroma.

[0037] 4. Improve extraction efficiency: The pressurizing effect of nitrogen can increase the penetration ability of the solvent (such as water vapor) into the agarwood raw material, enabling the solvent to contact the essential oil components in agarwood more quickly and fully, thereby accelerating the extraction speed and increasing the oil yield. At the same time, pressurization helps to break the cell structure of agarwood, making it easier for the essential oil to be released, further enhancing the extraction efficiency.

[0038] 5. Reduce impurities: Due to the inertness of nitrogen and its protective effect on the environment, impurities generated by oxidation, polymerization and other reactions can be reduced during the extraction process, obtaining relatively purer agarwood essential oil. This is very beneficial for the subsequent refining and use of the essential oil, reducing the difficulty and cost of further purification.

[0039] In summary, the core of the extraction device and method of the present invention for pressurized extraction of agarwood essential oil using nitrogen lies in creating a stable environment, reducing the boiling point and accelerating the release of components through inert gas; more low-volatile components (such as chromones, resins) can be extracted at a lower temperature (such as 80 - 90 °C), reducing the decomposition of thermosensitive components and retaining more thermosensitive aromatic substances, resulting in a fresher and more complex aroma of the essential oil, and achieving a higher purity without the need for long-term aging. At the same time, the dissolution ability of the solvent (water vapor) is enhanced under high-pressure environment, enabling a more comprehensive extraction of the active substances in agarwood. It not only retains the natural components of agarwood, but also increases the oil yield, reduces energy consumption, has a lower cost, and balances efficiency and cost. It has strong practicality and great significance for promotion.

[0040] The above embodiments only represent one implementation mode of the present invention, and the description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the present invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent should be subject to the appended claims.

Claims

1. A pressurized but not heated agarwood essential oil extraction and distillation device, characterized in that: It includes a distillation tank, an air supply device, a heating device, a condensing device, an oil-water separation device, a buffer tank and a reflux pump. A porous plate is provided at the inner bottom of the distillation tank, and an air inlet, an air inlet pipe, a water inlet and a condensing port are provided on the distillation tank. One end of the air inlet pipe is connected to the air inlet, and the other end extends downward along the inner wall of the distillation tank to the bottom and is located below the porous plate; the heating device is arranged at the bottom of the distillation tank, the water inlet and the condensing port are both arranged at the top of the distillation tank, the condensing device is installed on the condensing port, and the oil-water separation device is connected to the condensing device; the guide part is arranged in a trumpet shape with an aperture gradually increasing from top to bottom; the condensing device includes a horizontal condensing device and a vertical condensing device, the horizontal condensing device is installed above the distillation tank and connected to the condensing port, and the vertical condensing device is connected to the horizontal condensing device; the buffer tank is connected to the vertical heating and cooling device; a reflux port is also arranged on the distillation tank, and the reflux pump is connected to the buffer tank and the reflux port.

2. The agarwood essential oil extraction and distillation device with pressurization but no temperature increase as claimed in claim 1, characterized in that: The reflux port is arranged in an inclined extension structure with a higher outer side and a lower inner side, and the inner side end thereof extends below the porous plate.

3. The agarwood essential oil extraction and distillation device with pressurization but no temperature increase as claimed in claim 1, characterized in that: It also includes a filtering device, which is connected to the oil-water separation device.

4. The agarwood essential oil extraction and distillation device with pressurization but no temperature increase as claimed in claim 1, characterized in that: The distillation tank is also provided with a pressure regulating valve and a pressure gauge.

5. The agarwood essential oil extraction and distillation device with pressurization but no temperature increase as claimed in claim 1, characterized in that: The top of the distillation tank is also provided with a quick-opening inlet hole, and a sight glass is provided on the side of the quick-opening inlet hole.

6. The agarwood essential oil extraction and distillation device with pressurization but no temperature increase as claimed in claim 1, characterized in that: The distillation tank is also provided with a quick-opening hand hole, which is arranged on the side and located above the porous plate.

7. The agarwood essential oil extraction and distillation device with pressurization but no temperature increase as claimed in claim 1, characterized in that: The distillation tank is also provided with a discharge port, the inner bottom surface of the distillation tank is spherical, and the discharge port is arranged at the bottom.

8. The agarwood essential oil extraction and distillation device with pressurization but no temperature increase as claimed in claim 1, characterized in that: The heating device includes a plurality of jackets arranged at the bottom of the distillation tank and electric heating wires extending in the jackets. The jackets are provided with heat-conducting oil. The electric heating wires heat the hot oil in the jackets to a usable temperature through electrical heating to heat the bottom water inside into steam.

9. A method for extracting and distilling agarwood essential oil by increasing pressure without increasing temperature, characterized in that: A distillation device is first provided, which is a pressurized but non-heated agarwood essential oil extraction distillation device as described in any one of claims 1 to 8; water is added to the distillation tank from the water inlet, and the agarwood is crushed and placed on a porous plate; the openings of the distillation tank are closed, and high-purity pressurized gas is introduced into the distillation tank to discharge oxygen from the horizontal condensing device. After the gasification is completed, the nitrogen supply is stopped, and at the same time, the heating device is turned on to heat the agarwood raw material in the distillation tank; during the heating process, the heating rate is controlled so that the temperature gradually rises to the extraction temperature; under the conditions of heating and pressurization, the essential oil components in the agarwood evaporate together with the water vapor to form a mixed steam; the mixed steam enters the horizontal condensing device and the vertical condensing device through a pipeline for secondary cooling and liquefaction to form a mixed liquid containing essential oil and water; the mixed liquid enters the buffer tank, and the reflux pump draws the mixed liquid from the buffer tank back to the distillation tank for further distillation. When the distillation reaches the required number of times, the mixed liquid in the buffer tank is separated by an oil-water separation device.

10. The method for extracting and distilling agarwood essential oil by increasing pressure without increasing temperature as claimed in claim 9, characterized in that: The invention also comprises a filtering device, which is connected to the oil-water separation device. The filtered essential oil is stored in a storage tank, which is nitrogen-filled, light-proof, sealed and stored at low temperature.

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