CN111849641A - A kind of plant essential oil preparation process - Google Patents

Abstract

The invention relates to the technical field of plant essential oil preparation, in particular to a plant essential oil preparation process. Can drive the material of puddler in the internal jar body with material rising pole through the servo motor in the distillation mechanism and overturn, the material can not pile up, make diffusion to vapor that contains aromatic component's essential oil can be abundant in the material, the material is heated evenly, make production efficiency improve, can effectually collect essential oil calandria exhaust essential oil liquid through the essential oil temporary storage tank in the temporary storage mechanism, the mixed liquid gas jar of setting can be to not collecting the essential oil in the complete condensation gas, make the output of essential oil preparation improve.

Description

A kind of plant essential oil preparation process

technical field

The invention relates to the technical field of plant essential oil preparation, in particular to a process for preparing plant essential oil.

Background technique

Plant essential oils are extracted from the unique aromatic substances of plants, which are extracted from the flowers, leaves, roots, bark, fruits, seeds, resins, etc. of herbs by distillation and pressing. The steam distillation method is a common method for the extraction of plant essential oils. In the process, an azeotrope of oil and water is formed. After that, the azeotrope is cooled. Since the oil is insoluble in water, it is separated from the water to form the essential oil we need. The steam distillation method is very convenient and does not have to be used. chemical solvent, so the application is still very common now. When the existing preparation device is used, the materials are accumulated inside the distillation tank, resulting in accumulation, so that the essential oil containing the aromatic components in the materials cannot be diffused into the water vapor, so that the production efficiency and production effect are poor, and due to condensation. Incomplete condensation of the mechanism will cause the gas discharged from the device to contain essential oil gas, which reduces the yield of essential oil preparation.

SUMMARY OF THE INVENTION

In view of the problems in the prior art, the present invention provides a process for preparing plant essential oil.

The technical scheme adopted by the present invention to solve the technical problem is: a process for preparing plant essential oil, which comprises the following steps:

S1: select fresh plant raw material, wash and dry it for moisture, pulverize the plant raw material, and perform beating treatment on it again, so that the plant raw material after the beating treatment is dried into powder;

S2: put the powdered plant raw materials in S1 into the preparation equipment, add an appropriate amount of aqueous solution to it, then use a hot water bath to heat it up, add an appropriate amount of mixed enzymes to it, and heat while stirring , so that the obtained mixed solution is subjected to solid-liquid separation to obtain a crude extract;

S3: Put the crude extract obtained in S2 into ultrasonic equipment for a period of time, add an appropriate amount of organic extractant, use a separatory funnel extractor to oscillate and mix, and leave for a period of time to separate the vegetable oil and recover it. organic extractant;

The preparation equipment in S2 includes a steam mechanism, a distillation mechanism, a condensation mechanism and a temporary storage mechanism. The steam mechanism is provided on one side of the distillation mechanism, and a condensation mechanism is provided on the side of the distillation mechanism away from the steam mechanism. The condensation mechanism A temporary storage mechanism is provided on the side away from the distillation mechanism; a transmission mechanism is installed between the distillation mechanism and the condensation mechanism, wherein the transmission mechanism includes an eccentric wheel, a connecting rod and a piston, and the eccentric wheel is installed in the on the output shaft of the distillation mechanism, and the eccentric is connected to a connecting rod, and one end of the connecting rod is connected to a piston.

Specifically, the steam mechanism is composed of a steam tank, a fixed frame, a first servo motor, a first coupling, a first rotating shaft, a steam exhaust blade, a clean water stirring blade, a water inlet pipe and a steam exhaust pipe. The top of the tank is fixedly connected with a first servo motor through a fixed frame, and the shaft wall of the output shaft of the first servo motor is fixedly connected with a first rotating shaft through a first coupling, and the first rotating shaft is far away from the first rotating shaft. One end of the servo motor passes through the steam tank, the first rotating shaft is rotatably connected with the steam tank, and the first rotating shaft extends to the inner end of the steam tank. A shaft wall at one end is fixedly connected with a steam exhaust blade and a clean water stirring blade. The steam exhaust blade is arranged above the clear water stirring blade, the top of the steam tank is fixedly connected with a water inlet pipe and a steam exhaust pipe, the water inlet pipe is arranged on the side of the steam exhaust pipe away from the distillation mechanism, and the pipe of the water inlet pipe A gate valve is arranged on the wall.

Specifically, the distillation mechanism consists of an outer tank body, a tank cover, an exhaust pipe, a steam inlet pipe, an inner tank body, a second servo motor, an output shaft, a second rotating shaft, a stirring rod, a feeding rod and an air guide. The tank cover is arranged above the outer tank body, and the tank cover is threadedly sleeved on the outer tank wall on the top of the outer tank body. The top of the tank cover is fixedly connected with an exhaust pipe, and the outer tank body The bottom of the tank is fixedly connected with a steam inlet pipe, the other end of the steam inlet pipe is communicated with the steam exhaust pipe, an inner tank body is arranged inside the outer tank body, and a number of air guides are opened on the outer wall of the inner tank body. a through hole, a second servo motor is fixedly connected to the outer wall of the outer tank away from the steam mechanism through a fixed frame, and a second rotating shaft is fixedly connected to the shaft wall of the output shaft of the second servo motor through the output shaft , the end of the second rotation shaft away from the second servo motor passes through the side walls of the outer tank body and the inner tank body, the second rotation shaft is rotatably connected with the outer tank body and the inner tank body, and the second rotation axis A stirring rod is fixedly connected to the shaft wall extending to one end of the inner tank body, and the other end of the stirring rod is fixedly connected to the feeding rod.

Specifically, the condensing mechanism is composed of a condensing tank, a nodular spherical condensing pipe, a cold water pipe, a water pump, a return pipe, a hot water pipe and an essential oil drain pipe, and the nodular spherical condensing pipe is arranged inside the condensing tank, The bottom of the condensation tank is fixedly connected with a cold water pipe, the other end of the cold water pipe is connected with the output end of the water pump, the top of the condensation tank is fixedly connected with a return pipe and a hot water pipe, and the return pipe is arranged in the hot water. The pipe is close to the side of the distillation mechanism, and the end of the return pipe away from the condensation tank is connected with the water inlet pipe, the pipe wall of the hot water pipe is provided with a gate valve, and one end of the nodular spherical condenser pipe is connected to the exhaust pipe. connection, the other end of the nodular spherical condenser pipe is connected with an essential oil drain pipe, and the other end of the essential oil drain pipe passes through the condensation tank.

Specifically, the temporary storage mechanism is composed of an essential oil temporary storage tank and a mixed liquid gas tank, the essential oil temporary storage tank is fixedly connected to the pipe wall at the bottom of the essential oil pipe, and the essential oil temporary storage tank is arranged in the mixed liquid gas The tank is close to the side of the condensation mechanism, and the end of the essential oil drain pipe away from the condensation tank extends to the inner bottom of the mixed liquid gas tank.

Specifically, the fixing frame is composed of a fixing hoop, a fixing rod, a fixing plate and a countersunk head bolt, the fixing hoop is fixedly sleeved on the servo motor, and two side walls are fixedly connected to the side wall of the fixing hoop. A fixing rod, the two fixing rods are respectively fixedly connected to the two ends of the fixing hoop, and one end of the fixing rods away from the fixing hoop is fixedly connected with a fixing plate, and the fixing plate is provided with a countersunk head bolt.

Specifically, the pipe body of the essential oil drain pipe located between the essential oil temporary storage tank and the mixed liquid gas tank has a convex structure, and the mixed liquid gas tank is provided with a non-polar solvent.

Beneficial effects of the present invention:

(1) The preparation process of a kind of plant essential oil according to the present invention, the servo motor in the distillation mechanism can drive the stirring rod and the feeding rod to overturn the material in the inner tank, and the material will not accumulate, so that the material contains aroma The essential oil of the ingredients can be fully diffused into the water vapor, and the material is heated evenly, which improves the production efficiency.

(2) a kind of plant essential oil preparation process of the present invention, the essential oil liquid discharged from the essential oil pipe can be effectively collected by the essential oil temporary storage tank in the temporary storage mechanism, and the mixed liquid gas tank provided can effectively condense the liquid that is not completely condensed The essential oil in the gas is collected, so that the yield of the essential oil preparation is increased.

Description of drawings

The present invention will be further described below with reference to the accompanying drawings and embodiments.

Fig. 1 is the process flow diagram of the present invention;

Fig. 2 is the structural representation of a kind of plant essential oil preparation equipment provided by the present invention;

Fig. 3 is the structural representation of steam mechanism in a kind of plant essential oil preparation equipment provided by the present invention;

Fig. 4 is the structural representation of distillation mechanism in a kind of plant essential oil preparation equipment provided by the present invention;

5 is a schematic structural diagram of a condensation mechanism in a plant essential oil preparation equipment provided by the present invention;

6 is a schematic structural diagram of a temporary storage mechanism in a plant essential oil preparation equipment provided by the present invention;

7 is a schematic structural diagram of a fixed rack in a plant essential oil preparation equipment provided by the present invention.

In the figure: 1, steam mechanism; 11, steam tank; 12, fixed frame; 13, first servo motor; 14, first coupling; 15, first rotating shaft; 16, steam vane; 17, clean water Stirring blade; 18, water inlet pipe; 19, steam exhaust pipe; 2, distillation mechanism; 21, outer tank body; 22, tank cover; 23, exhaust pipe; 24, steam inlet pipe; 25, inner tank body; 26, The second servo motor; 27, the output shaft; 28, the second rotating shaft; 29, the stirring rod; 210, the feeding rod; 211, the air guide hole; 3, the condensation mechanism; 31, the condensation tank; Spherical condenser pipe; 33, cold water pipe; 34, water pump; 35, return pipe; 36, hot water pipe; 37, essential oil drain pipe; 4, temporary storage mechanism; 41, essential oil temporary storage tank; 42, mixed liquid gas tank; 121, fixed hoop; 122, fixed rod; 123, fixed plate; 124, countersunk head bolt, 5, transmission mechanism, 51, eccentric, 52, connecting rod, 53, piston.

Detailed ways

In order to make it easy to understand the technical means, creation features, achieved goals and effects of the present invention, the present invention will be further described below with reference to the specific embodiments.

As shown in Fig. 1-Fig. 7, a kind of plant essential oil preparation technology of the present invention, this technology comprises the following steps:

S1: select fresh plant raw material, wash and dry it for moisture, pulverize the plant raw material, and perform beating treatment on it again, so that the plant raw material after the beating treatment is dried into powder;

S2: put the powdered plant raw materials in S1 into the preparation equipment, add an appropriate amount of aqueous solution to it, then use a hot water bath to heat it up, add an appropriate amount of mixed enzymes to it, and heat while stirring , so that the obtained mixed solution is subjected to solid-liquid separation to obtain a crude extract;

S3: Put the crude extract obtained in S2 into ultrasonic equipment for a period of time, add an appropriate amount of organic extractant, use a separatory funnel extractor to oscillate and mix, and leave for a period of time to separate the vegetable oil and recover it. organic extractant;

The preparation equipment in S2 includes a steam mechanism 1, a distillation mechanism 2, a condensation mechanism 3 and a temporary storage mechanism 4. The steam mechanism 1 is provided on one side of the distillation mechanism 2, and the distillation mechanism 2 is provided on a side away from the steam mechanism 1. There is a condensation mechanism 3, and a temporary storage mechanism 4 is provided on the side of the condensation mechanism 3 away from the distillation mechanism 2; a transmission mechanism 5 is installed between the distillation mechanism 2 and the condensation mechanism 3, wherein the transmission mechanism 5 Including an eccentric wheel 51, a connecting rod 52 and a piston 53, the eccentric wheel 51 is installed on the output shaft 27 of the distillation mechanism 2, and the eccentric wheel 51 is connected to the connecting rod 52, and one end of the connecting rod 52 is connected The piston 53 drives the rotation of the eccentric wheel 51 through the rotation of the output shaft 27, and the rotation of the eccentric wheel 51 realizes the intermittent up and down movement of the connecting rod 52, which drives the piston 53 to move up and down, and promotes the liquid flow in the condensation mechanism 3.

Specifically, the steam mechanism 1 consists of a steam tank 11 , a fixed frame 12 , a first servo motor 13 , a first coupling 14 , a first rotating shaft 15 , a steam exhaust blade 16 , a clean water stirring blade 17 , and a water inlet pipe 18 It is composed of a steam exhaust pipe 19, the top of the steam tank 11 is fixedly connected with a first servo motor 13 through a fixed frame 12, and the shaft wall of the output shaft of the first servo motor 13 is fixedly connected through a first coupling 14. There is a first rotating shaft 15, the end of the first rotating shaft 15 away from the first servo motor 13 passes through the steam tank 11, the first rotating shaft 15 is rotatably connected with the steam tank 11, and the first rotating shaft 15 extends The shaft wall to the inner end of the steam tank 11 is fixedly connected with a steam exhaust blade 16 and a clean water stirring blade 17, the steam exhaust blade 16 is arranged above the clean water stirring blade 17, and a water inlet pipe is fixedly connected to the top of the steam tank 11. 18 and a steam exhaust pipe 19, the water inlet pipe 18 is arranged on the side of the steam exhaust pipe 19 away from the distillation mechanism 2, and the wall of the water inlet pipe 18 is provided with a gate valve, which can quickly and efficiently produce high-temperature steam.

Specifically, the distillation mechanism 2 consists of an outer tank 21 , a tank cover 22 , an exhaust pipe 23 , a steam inlet pipe 24 , an inner tank 25 , a second servo motor 26 , an output shaft 27 , a second rotating shaft 28 , a stirring The rod 29, the feeding rod 210 and the air guiding through hole 211 are formed. The tank cover 22 is arranged above the outer tank body 21, and the tank cover 22 is threadedly sleeved on the outer tank wall on the top of the outer tank body 21. The top of the tank cover 22 is fixedly connected with an exhaust pipe 23, the bottom of the outer tank body 21 is fixedly connected with a steam inlet pipe 24, and the other end of the steam inlet pipe 24 is communicated with the steam exhaust pipe 19. The outer tank body 21 is provided with an inner tank 25, the outer wall of the inner tank 25 is provided with a number of air guide holes 211, and the outer wall of the outer tank 21 is fixed by the fixing frame 12 on the outer wall of the side away from the steam mechanism 1 A second servo motor 26 is connected, the shaft wall of the output shaft of the second servo motor 26 is fixedly connected with a second rotating shaft 28 through the output shaft 27, and the end of the second rotating shaft 28 away from the second servo motor 26 passes through. Through the side walls of the outer tank 21 and the inner tank 25, the second rotation shaft 28 is rotatably connected with the outer tank 21 and the inner tank 25, and the second rotation shaft 28 extends to one end of the inner tank 25. A stirring rod 29 is fixedly connected to the shaft wall, and the other end of the stirring rod 29 is fixedly connected to a feeding rod 210, which can stir the material, so that the material is heated evenly and does not accumulate.

Specifically, the condensation mechanism 3 is composed of a condensation tank 31, a nodular spherical condenser pipe 32, a cold water pipe 33, a water pump 34, a return pipe 35, a hot water pipe 36 and an essential oil drain pipe 37. The pipe 32 is arranged inside the condensation tank 31, the bottom of the condensation tank 31 is fixedly connected with a cold water pipe 33, the other end of the cold water pipe 33 is connected with the output end of the water pump 34, and the top of the condensation tank 31 is fixedly connected with a A return pipe 35 and a hot water pipe 36, the return pipe 35 is arranged on the side of the hot water pipe 36 close to the distillation mechanism 2, and the end of the return pipe 35 away from the condensation tank 31 is connected to the water inlet pipe 18, the hot water A gate valve is provided on the pipe wall of the pipe 36, one end of the nodal spherical condenser pipe 32 is connected with the exhaust pipe 23, and the other end of the nodal spherical condenser pipe 32 is connected with an essential oil exhaust pipe 37, the essential oil The other end of the exhaust pipe 37 passes through the condensing tank 31, which can quickly condense the mixed steam, and the hot water can be returned to the interior of the steam tank 11 through the set return pipe 35, thereby saving resources.

Specifically, the temporary storage mechanism 4 is composed of an essential oil temporary storage tank 41 and a mixed liquid gas tank 42. The essential oil temporary storage tank 41 is fixedly connected to the pipe wall at the bottom of the essential oil pipe 37, and the essential oil temporary storage tank 41 is arranged on the side of the mixed liquid gas tank 42 close to the condensation mechanism 3, and one end of the essential oil pipe 37 away from the condensation tank 31 extends to the inner bottom of the mixed liquid gas tank 42, which can effectively prevent the device from not completely condensing the mixed gas. , so that the gas discharged from the device can be effectively prevented from containing essential oils.

Specifically, the fixing frame 12 is composed of a fixing hoop 121, a fixing rod 122, a fixing plate 123 and a countersunk head bolt 124. The fixing hoop 121 is fixedly sleeved on the servo motor. Two fixing rods 122 are fixedly connected to the wall, and the two fixing rods 122 are respectively fixedly connected to the two ends of the fixing hoop 121 . The plate 123 is provided with countersunk head bolts 124, and the fixing frame 12 can be disassembled by removing the countersunk head bolts 124, which is convenient for disassembly and assembly of the servo motor, and saves time and effort.

Specifically, the pipe body of the essential oil drain pipe 37 between the essential oil temporary storage tank 41 and the mixed liquid gas tank 42 has a convex structure, which can effectively prevent the condensed essential oil from being discharged into the essential oil temporary storage tank 41, and The non-polar solvent provided in the mixed liquid gas tank 42 can adsorb the essential oil in the mixed gas.

During use, the gate valve on the water inlet pipe 18 is opened, the gate valve on the hot water pipe 36 is closed, and the clean water is transported to the inside of the condensation tank 31 through the water pump 34, and the clean water in the condensation tank 31 is transported to the steam tank 11 through the water inlet pipe 18. Inside, the material is placed inside the inner tank 25, the tank cover 22 is rotated and tightened, the steam tank 11 is heated by the heater, the first servo motor 13 is driven by an external power supply, and the first servo motor 13 drives the clean water stirring blade 17 When rotating with the steam exhaust vane 16, the clean water stirring blade 17 can drive the clear water in the steam tank 11 to stir, so that the clear water is heated evenly, and the steam exhaust vane 16 can accelerate the speed of water vapor delivery to the steam exhaust pipe 19 when the steam exhaust vane 16 rotates. After heating, water vapor containing a large amount of heat is generated. The water vapor is transported to the inside of the outer tank 21 by the steam exhaust pipe 19, and the steam in the steam exhaust pipe 19 is transported to the outer tank body 21 and the inner tank body 25 by the steam inlet pipe 24. In the cavity between the two, the water vapor in the cavity diffuses into the inner tank 25 through the air-conducting through holes 211 to distill the material. The second servo motor 26 is driven by an external power supply, and the second servo When the motor 26 is driven, it drives the second rotating shaft 28 to rotate. When the second rotating shaft 28 rotates, it can drive the stirring rod 29 and the feeding rod 210 to turn over the material in the inner tank 25, and the material will not accumulate, so that the material contains aroma. The essential oil of the ingredients can be fully diffused into the water vapor, the material is heated evenly, and the production efficiency is improved. The mixed gas and water vapor with the essential oil are discharged from the exhaust pipe 23 to the inside of the spherical condenser tube 32, and the condensation tank 31 The cold water inside condenses the mixed gas in the nodular spherical condenser tube 32, so that the mixed gas becomes liquid, and the liquid essential oil drips into the interior of the essential oil temporary storage tank 41. When the condensation mechanism 3 does not completely condense the gas, The essential oil pipe 37 transports the uncondensed gas to the inside of the mixed liquid gas tank 42, and the non-polar solvent (petroleum ether, toluene) in the mixed liquid gas tank 42 can adsorb and collect the essential oil in the gas, so that the essential oil is prepared. Yield increases.

The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above-mentioned embodiments, and the descriptions in the above-mentioned embodiments and the description are only to illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will also There are various changes and improvements which fall within the scope of the claimed invention. The claimed scope of the present invention is defined by the appended claims and their equivalents.

Claims (7)

1. A preparation process of plant essential oil is characterized by comprising the following steps:

s1: selecting fresh plant raw materials, cleaning and drying the fresh plant raw materials, crushing the plant raw materials, and pulping the plant raw materials again to dry the pulped plant raw materials into powder;

s2: putting the powdery plant raw material in the S1 into preparation equipment, adding a proper amount of aqueous solution into the preparation equipment, heating the preparation equipment by adopting a hot water bath, adding a proper amount of mixed enzyme into the preparation equipment, and heating the mixture while stirring to separate solid from liquid to obtain a mixed solution, thereby obtaining a crude extraction solution;

s3: putting the crude extraction liquid obtained in the step S2 into ultrasonic equipment, performing ultrasonic treatment for a period of time, adding a proper amount of organic extractant, uniformly mixing by adopting a separating funnel extractor, standing for a period of time, separating out vegetable oil, and recovering the organic extractant;

The preparation equipment in the S2 comprises a steam mechanism (1), a distillation mechanism (2), a condensation mechanism (3) and a temporary storage mechanism (4), wherein the steam mechanism (1) is arranged on one side of the distillation mechanism (2), the condensation mechanism (3) is arranged on one side, away from the steam mechanism (1), of the distillation mechanism (2), and the temporary storage mechanism (4) is arranged on one side, away from the distillation mechanism (2), of the condensation mechanism (3); a transmission mechanism (5) is installed between the distillation mechanism (2) and the condensation mechanism (3), wherein the transmission mechanism (5) comprises an eccentric wheel (51), a connecting rod (52) and a piston (53), the eccentric wheel (51) is installed on an output shaft (27) of the distillation mechanism (2), the eccentric wheel (51) is connected with the connecting rod (52), and one end of the connecting rod (52) is connected with the piston (53).

2. A process for preparing a plant essential oil according to claim 1, wherein: steam mechanism (1) comprises steam drum (11), fixed frame (12), first servo motor (13), first shaft coupling (14), first axis of rotation (15), steam row leaf (16), clear water stirring leaf (17), inlet tube (18) and steam comb (19), the top of steam drum (11) is through fixed frame (12) fixedly connected with first servo motor (13), through first shaft coupling (14) fixedly connected with first axis of rotation (15) on the shaft wall of first servo motor (13) output shaft, the one end that first servo motor (13) was kept away from in first axis of rotation (15) passes steam drum (11), first axis of rotation (15) is connected with steam drum (11) rotation, fixedly connected with steam row leaf (16) and clear water stirring leaf (17) on the shaft wall that first axis of rotation (15) extended to steam drum (11) inside one end, steam row leaf (16) set up in the top of clear water stirring leaf (17), the fixed intercommunication in top of steam drum (11) has inlet tube (18) and steam calandria (19), inlet tube (18) set up the one side of keeping away from distillation mechanism (2) in steam calandria (19), just be provided with the gate valve on the pipe wall of inlet tube (18).

3. A process for preparing a plant essential oil according to claim 1, wherein: the distillation mechanism (2) comprises an outer tank body (21), a tank cover (22), an exhaust pipe (23), a steam inlet pipe (24), an inner tank body (25), a second servo motor (26), an output shaft (27), a second rotating shaft (28), a stirring rod (29), a material rising rod (210) and an air guide through hole (211), wherein the tank cover (22) is arranged above the outer tank body (21), the tank cover (22) is sleeved on the outer tank wall at the top of the outer tank body (21) in a threaded manner, the exhaust pipe (23) is fixedly communicated with the top of the tank cover (22), the steam inlet pipe (24) is fixedly communicated with the bottom of the outer tank body (21), the other end of the steam inlet pipe (24) is communicated with a steam exhaust pipe (19), the inner tank body (25) is arranged in the outer tank body (21), and a plurality of air guide through holes (211) are formed in the outer wall of the inner tank body (25), the outer tank body (21) is far away from on the outer wall of steam mechanism (1) one side through fixed frame (12) fixedly connected with second servo motor (26), through output shaft (27) fixedly connected with second axis of rotation (28) on the axle wall of second servo motor (26) output shaft, the lateral wall of outer tank body (21) and interior tank body (25) is passed to the one end that second servo motor (26) were kept away from in second axis of rotation (28), second axis of rotation (28) rotate with outer tank body (21) and interior tank body (25) and are connected, fixedly connected with puddler (29) on the axle wall of second axis of rotation (28) extension to the inside one end of interior tank body (25), the other end fixed connection of puddler (29) soaks material pole (210).

4. A process for preparing a plant essential oil according to claim 1, wherein: the condensation mechanism (3) comprises a condensation tank (31), a joint-shaped spherical condensation pipe (32), a cold water pipe (33), a water pump (34), a return pipe (35), a hot water pipe (36) and an essential oil exhaust pipe (37), the joint-shaped spherical condensation pipe (32) is arranged inside the condensation tank (31), the cold water pipe (33) is fixedly communicated with the bottom of the condensation tank (31), the other end of the cold water pipe (33) is connected with the output end of the water pump (34), the return pipe (35) and the hot water pipe (36) are fixedly communicated with the top of the condensation tank (31), the return pipe (35) is arranged on one side, close to the distillation mechanism (2), of the hot water pipe (36), one end, far away from the condensation tank (31), of the return pipe (35) is connected with the water inlet pipe (18), a gate valve is arranged on the pipe wall of the hot water pipe (36), one end of the joint-shaped spherical condensation pipe (32) is connected with the exhaust pipe (23), the other end of the nodal spherical condenser pipe (32) is connected with an essential oil discharge pipe (37), and the other end of the essential oil discharge pipe (37) penetrates through the condensing tank (31).

5. A process for preparing a plant essential oil according to claim 1, wherein: temporary storage mechanism (4) are kept in jar (41) and are mixed liquid gas jar (42) by essential oil and constitute, essential oil is kept in jar (41) fixed intercommunication on the pipe wall of essential oil calandria (37) bottom, just essential oil is kept in jar (41) and is set up the one side that is close to condensation mechanism (3) in mixed liquid gas jar (42), the interior bottom that condensation jar (31) were kept away from in essential oil calandria (37) extends to mixed liquid gas jar (42).

6. A process for preparing a plant essential oil according to claim 2, wherein: fixed frame (12) comprises fixed hoop (121), dead lever (122), fixed plate (123) and countersunk head bolt (124), fixed hoop (121) is fixed to be cup jointed on servo motor, two dead lever (122) of fixedly connected with on the lateral wall of fixed hoop (121) one side, two dead lever (122) fixed connection is at the both ends of fixed hoop (121) respectively, one end fixedly connected with fixed plate (123) of fixed hoop (121) are kept away from in dead lever (122), be provided with countersunk head bolt (124) on fixed plate (123).

7. A process according to claim 5, wherein the plant essential oil is prepared by: the pipe body that essential oil calandria (37) are located between essential oil temporary storage tank (41) and mixed liquid gas tank (42) is convex structure, just mixed liquid gas tank (42) inside is provided with the nonpolar solvent.

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