CN102250689A - Equipment and method for extracting perfume plant essential oil by reduced pressure steam distillation - Google Patents

Abstract

The invention provides a device and a method for extracting volatile essential oils from natural spice plants by adopting a decompression steam extraction technology. The equipment provided by the present invention includes a steam distillation system and a vacuum system, wherein the steam distillation system is composed of a steam generator, a material distillation tank, a condenser, an oil-water separator and connecting pipelines; the vacuum system is composed of a vacuum unit or a vacuum pump Composed of air pump, pressure regulating valve and connecting pipelines. The plant raw materials to be extracted essential oils in the material tank control the corresponding temperature and pressure to minimize the change of the aroma components of the spice plants during the extraction process. The volatile components of the extracted essential oils and water vapor form a mixed vapor of water and oil. After condensing in the condenser, it enters the oil-water separator, and the oil phase is separated and collected to be plant essential oil; the separated water phase is flower water. The essential oil and flower water obtained by the extraction method have pure aroma and less loss of top notes, and can be applied to industries such as spices, flavors, cosmetics and daily chemicals.

Description

A kind of equipment and method for extraction of spice plant essential oil by vacuum steam distillation

technical field

The invention relates to a device and a method for extracting spice plant essential oil. More specifically, the present invention relates to a device and method for extracting volatile essential oils from natural spice plants by using a decompression steam extraction technique.

Background technique

Spice plant essential oil processing is an ancient industry. The ancient Egyptians extracted essential oils from herbs, fruits, vegetables, woody plants, flowers and other plants to treat diseases and worship gods, and also used them as preservatives for making mummies; the Greeks learned from Egypt and used essential oils in large quantities in cosmetics, Medical treatment and prevention of infectious diseases; In 100 BC, the Romans used plant essential oils in massage, and with the Crusades, knowledge of spices and essential oils also began to spread to Europe. However, due to the extremely rare and precious nature of essential oils, for a long period of history, essential oils were only exclusive luxury items for the aristocracy. In recent years, with the increase of people's demand for natural food additives and the deepening of people's awareness of aromatherapy, spice plant essential oils have attracted more and more attention. The essential oils of plant spices taken from nature have a strong bactericidal function, which can greatly reduce and eliminate bacteria and viruses in the air. Using essential oils to prevent bacteria and viruses not only does not have the side effects of common drugs, but also the original plant flavor will make people feel infinitely better. More importantly, it is safe to use among the elderly and children, and the method is simple and feasible.

With the increasing progress of modern extraction technology, the rapid development of flower agriculture, and the gradual increase of people's economic income, essential oils have gradually entered the homes of ordinary people. The volatile aroma components contained in spice plants can be extracted by chemical and physical methods, and are widely used in chemical industry, medicine, health care, cosmetics, food additives, detergents, garden fragrances and other fields. There are more than 3,000 species of spice plants in the world, and more than 400 species are artificially planted. In recent years, the world trade volume of spice plants has also shown a steady upward trend. Modern research shows that in addition to pleasant aroma components, spice plants also contain important medicinal components and rich nutritional components, and many spice plants have high ornamental value. In particular, herbs and spices have been favored in Europe, America and Japan, and in South Korea and Taiwan, China in recent years, and their development speed is extremely fast. Due to the sharp increase in depression patients and the spread of respiratory viral infectious diseases, modern medical research has placed high hopes on spice plants. Coupled with the unique bactericidal and antioxidant effects of spice plants, many foreign research institutions have increased their research on spice plants. Research and development efforts. China has a vast land and rich resources, and is rich in spice plant resources, but only a small number of them are effectively developed and utilized. Except for a few varieties that are processed and utilized, most of them are sold in the form of raw materials, and the added value of products is difficult to reflect.

Essential oil, also known as volatile oil, is a general term for a class of oily liquids that exist in plants with an aromatic odor, can volatilize at room temperature, and can be distilled with water vapor. Plant essential oils are widely distributed in the plant kingdom. There are more than 300 kinds of wild and cultivated spices and medicinal plants containing essential oils in my country. Plant essential oils exist in various tissues and organs such as glandular hairs, oil chambers, oil ducts, secretory cells or resin ducts of plants. Most of them exist in oil droplets, and some coexist with resin and mucus. The amount of essential oil contained in plants is generally below 1%, and there are also a few as high as about 20%. Most plant essential oils have the effects of expectorant, cough, asthma, wind, stomach, antipyretic, analgesic, antibacterial and anti-inflammatory: for example, bergamot oil has inhibitory effects on gonorrhea, staphylococcus, Escherichia coli and diphtheria Clove oil has local anesthesia and analgesic effects; peppermint oil has cooling, carminative, and anti-inflammatory effects; jasmine oil has exciting effects, etc. Camphor, borneol, menthol, and eugenol have long been used clinically. At present, aromatherapy, which is more popular in the world, mainly refers to a method of treating diseases by using essential oils extracted from spice plants, with the help of massage, inhalation, water bath and other means to maintain health, beautify and regulate emotions. Plant essential oils are an important part of natural flavors and fragrances. Because natural fragrances have a unique fragrance that cannot be replaced by synthetic fragrances, and most of them do not have toxic and side effects, their production is not bad. In addition, plant essential oils are widely used in medicine and nursing, and are also very important raw materials in cosmetics, daily necessities, food industry and chemical industry. For this reason, the extraction and separation of plant essential oils has become a hot spot in the study of plant essential oils. The demand for plant essential oils is also increasing year by year, and the quality requirements are also getting higher and higher.

Traditionally, the most commonly used method for separating plant essential oils is steam distillation. This method is simple in equipment and operation, and requires less investment. It is suitable for use in remote areas and areas where raw materials are scattered. At present, it is still widely used in the production of essential oils in my country. Methods. According to different processes and equipment, it can be further divided into water distillation, water distillation and steam distillation. Distillation in water is to soak the spice plants in water, directly heat to distill water and essential oil, and then separate the essential oil after cooling. This method is simple and convenient, but the plant raw materials are directly heated, which will easily decompose some components of the essential oil and coke some raw materials, which will affect the quality of the essential oil. Both water distillation and steam distillation are to crush the spice plant to be extracted and put it into the still. As the hot saturated water vapor continuously passes through the material layer of the plant spice from bottom to top, the essential oil is distilled out together with the water vapor. It avoids overheating or coking during distillation. Steam distillation is currently the most widely used method and is suitable for the extraction of volatile components with low solubility in water. The equipment is simple, easy to operate and low in cost. However, traditional steam distillation also has disadvantages such as high operating temperature, which will cause thermal decomposition of heat-sensitive compounds in essential oils and hydrolysis of easily hydrolyzed components. Based on the problems of steam distillation, people began to devote themselves to improving distillation equipment. Pressurized series distillation, continuous distillation, distillation with double distillation column, and worm gear fast steam distillation have been adopted. These equipments have their own advantages and characteristics, and to a certain extent, the quality or production efficiency of the produced essential oil has been improved. , but there are also problems of thermal decomposition and hydrolysis under high-temperature contact with water vapor, and the investment in equipment also increases accordingly.

Contents of the invention

Aiming at the problems in the prior art that the quality of the extracted essential oils of spice plants is unstable, heat-sensitive and easily hydrolyzed components are seriously lost, and the flavor of natural spice plants is deteriorated, the present invention provides a set of steam distillation system and Vacuum system vacuum steam distillation equipment for extracting essential oils of spice plants. This equipment is different from traditional steam distillation in which steam enters from the bottom and passes through the extracted material layer to fully contact, disperse and gasify the spice plants to be extracted. The formed mixed steam of water and volatile essential oil is led out from the upper part, but the steam from the steam generator is introduced from the upper part of the distillation tank, and the gas is evenly dispersed by the distributor, and then passes through the to-be-extracted evenly and stably from top to bottom. In the material layer of the material, the obtained mixed steam of water and volatile essential oil is exported from the lower steam outlet of the distillation tank, cooled by the condenser, and then separated into the oil-water separator to obtain the fragrance essential oil. Because the decompression process is adopted in the distillation process, the corresponding extraction temperature is greatly reduced. Therefore, this method overcomes the defect of high distillation temperature of traditional steam distillation, and the heat-sensitive aroma components are well preserved; and the shortening The contact time of the mixed steam of water and volatile essential oil at a higher temperature is shortened, which effectively inhibits the hydrolysis of the easily hydrolyzed components in the essential oil; at the same time, the oxidized and rancid components in the flower water after the essential oil is separated are also obvious. It can be used in the perfuming of related products. This method not only improves the flavor quality of the produced essential oil, but also improves the flavor quality of the flower water after the essential oil is separated, so that it can be directly used for the perfuming of related products. No organic solvent is used in the production process, and the product has no solvent residue, It has the characteristics of no pollution and high biological activity. It has the advantages of small investment in production equipment, high production efficiency per unit time, low energy consumption, flexible operation, good product aroma quality, and basically maintains the flavor of natural spice plants.

In order to achieve the above object, a device for extracting spice plant essential oil by vacuum steam distillation provided by the present invention is realized by adopting the following technical scheme.

A device for extracting spice plant essential oils by steam distillation under reduced pressure, characterized in that it comprises:

The steam distillation system consists of a steam generator, a material distillation tank, a condenser, an oil-water separator and connecting pipelines, and is used to control the corresponding temperature and pressure according to the properties of the spice plant raw materials from which the essential oil is to be extracted to reduce the aroma of the spice plants. The aroma components change during the extraction process. After the distillation starts, the raw material is heated by the steam from the steam generator. During the heating process, the hot water vapor continuously penetrates into the raw material tissue for water dispersion, making the volatile components of essential oils It forms a mixed steam of water and oil with water vapor. After the steam is condensed by the condenser, the distillate enters the oil-water separator, where it can be separated and collected to obtain the corresponding plant essential oil; the distilled water obtained after the essential oil is separated is filtered. flower water;

The vacuum system is composed of a vacuum unit or an air pump, a pressure regulating valve and connecting pipelines, etc., and is used to control the vapor pressure and corresponding temperature of the system.

The steam generator of the vacuum steam distillation system is a steam boiler or a steamer with a heating device.

The upper part of the material distillation tank of the described vacuum steam distillation system is a steam inlet, and the lower part is a steam outlet, and the bottom of the distillation tank is conical, which is used to store a small amount of condensed water condensed during the distillation process; The steam generated by the steam generator of the pressurized steam distillation system enters the material distillation tank from the upper part through the connecting pipe, and the steam can evenly enter the material filled in the material tank through the open steam coil or sieve plate Middle; the vapor after distilling the material enters the oil-water separator after being condensed by the condenser.

The vacuum system of the decompression steam distillation system is composed of a vacuum unit, a pressure regulating valve and a connecting pipeline; in order to reduce the loss of volatile components in the material and protect the vacuum unit, the pipeline connected between the vacuum unit and the condenser is required A cold trap, a drying tower, an acid absorption tower and a hydrocarbon absorption tower are installed in the middle.

The vacuum system of the decompression steam distillation system is composed of a jet vacuum unit, a pressure regulating valve and connecting pipelines.

The vacuum system of the decompression steam distillation system is composed of a circulating water type multi-purpose vacuum pump, a pressure regulating valve and connecting pipelines.

The device for extracting essential oils from spice plants by vacuum steam distillation can easily adjust the vacuum degree of the control system through the vacuum system control valve, and is flexible and convenient to operate to adapt to the extraction of spice essential oils with different properties. It is a spice with wide applicability. General equipment for plant essential oil production.

A method for extracting spice plant essential oils by vacuum steam distillation provided by the present invention is realized by adopting the following technical scheme.

A method for extracting spice plant essential oil by steam distillation under reduced pressure, comprising the following steps:

(1) After the spice plants to be extracted are crushed, cut, ground or crushed according to the characteristics of the material, they are evenly loaded into the material distillation tank, and the height and tightness of the material should be taken into account. The characteristics of the material itself The material that will expand after steaming should be filled with 70-80% of the volume of the retort. For fresh raw materials, it should generally be filled with more than 80% of the volume of the retort, and be evenly compressed to prevent short circuit of the steam;

(2) Through the open steam coil or sieve plate, the water vapor is evenly heated from top to bottom, and at the same time, the saturated steam is gradually condensed by the material layer, and the hot water formed by the material layer continuously penetrates into the material tissue, and the material is in the steam. In the process of heating, diffusion and condensation, a good water dispersion effect is formed; with the continuous entry of water vapor, the oil-water mixed vapor is introduced into the condenser through the steam outlet at the lower part of the material tank, and after cooling, it is separated by the oil-water separator to obtain The required essential oil, the separated water phase is flower water; the condensed small amount of condensed water containing essential oil components in the material flows into the condensed water receiving tank through the material tank, and is taken out when a certain volume is received, and passed through the oil-water separator Separating a small amount of essential oil, and obtaining the required essential oil after decolorization, the separated water phase is flower water;

(3) In order to reduce the loss of spice substances, the vacuum water pump adopts a circulating water type. After the circulating water is recycled for 6-8 hours, a large amount of spice components that have not been completely condensed by the condenser have been dissolved in the resulting circulating water. After this part of circulating water is filtered, the required flower water product can be obtained.

In the method for extracting essential oils of spice plants by steam distillation under reduced pressure, the saturated water vapor from the steam generator is introduced from the upper part of the distillation tank, and a small amount of condensed water condensed after contacting the spice plants directly enters the condensate at the bottom of the distillation tank. The water receiver avoids the deterioration of the aroma components in the condensed water containing the volatile components in the material that has been cooled down first due to the hot steam entering from the bottom.

The described method for extracting essential oils of spice plants by steam distillation under reduced pressure can be widely used for the essential oils including lavender, rose, thyme, sweet green orchid, coumarin, hops, angelica, Xinjiang ligusticum, snow lotus, ephedra, acacia, bitter Extraction of volatile essential oil components of various natural plants including beans, basil, mint, etc.

The beneficial effects obtained by the present invention are:

1. What the present invention provides is a kind of equipment and method for extracting spice plant essential oil by vacuum steam distillation. Compared with traditional steam distillation technology, the product obtained by this equipment and method can ensure that the production cost is close to it, but The natural quality of the product is better, and the heat-sensitive and easily hydrolyzed aroma components of spices and plants can be preserved more completely, and the flower water after the separation of essential oils does not have the smell of oxidation and rancidity, and can be directly used for the aromatization of related products, which greatly improves the economic benefits.

2. What the present invention provides is a kind of equipment and the method for extracting spice plants essential oil by steam distillation under reduced pressure, if the used vacuum system adopts the circulating water type vacuum system, then the circulating water can dissolve and absorb the unresolved oil in the condensation process. The fragrance molecules are completely condensed, so that after a period of absorption, the circulating water can be discharged, filtered and purified, and used as flower water, and this part of the flower water contains more top fragrance components, and the natural aroma is more full.

3. The present invention is an improvement and enhancement of the traditional steam distillation method. No poisonous or harmful gases and solvents are used in the production process, and the product has no solvent residue. The operation is simple, the production efficiency is high, and it meets the requirements of environmental protection.

4. The equipment provided by the present invention for extraction of spice plant essential oils by steam distillation under reduced pressure has the characteristics of small investment, flexible use, simple installation, etc., and the process can be conveniently adjusted by controlling the vacuum degree of the system for different types of raw materials Parameters have wide applicability, and product varieties can be replaced according to different seasons.

Detailed ways

Below adopt the mode of specific embodiment to specifically explain the present invention, but the present invention is not limited to embodiment.

Example 1

After 300g of dried lavender flowers are crushed, they are evenly packed into the material distillation tank, and the height of the filling is 80% of the distillation tank, and they are evenly compressed to prevent short circuit of steam. Through the open steam coil or sieve plate, the water vapor from the steam generator is evenly heated from top to bottom gradually, and at the same time, the saturated steam is gradually condensed by the material layer and the hot water formed by the material layer continuously penetrates into the material tissue. During the process of steam diffusion and condensation, a good water dispersion effect is formed; with the continuous entry of water vapor and the action of the vacuum water pump, the oil-water mixed steam is introduced into the condenser through the steam outlet at the lower part of the material tank to fully condense, and the cooled oil-water The mixed liquid is received in the oil-water separator, and the crude product of the essential oil is obtained after being separated by the oil-water separator; the condensed small amount of condensed water containing the essential oil components in the material flows into the condensed water receiving tank through the material tank, and when a certain volume is received, it is extracted from it. Take it out, and separate the crude product of a small amount of essential oil therein through an oil-water separator. After 1.5 hours of extraction in this way, the two parts of the crude essential oil obtained above were combined, and refined by dehydration, decolorization and filtration to obtain 4.37 g of the essential oil product. Collect about 800mL of the water phase after oil-water separation, and filter to obtain the flower water product.

Example 2

Cut 300g of lavender half into 2-3cm, crush it a little and put it evenly into the material distillation tank. Through the open steam coil or sieve plate, the water vapor from the steam generator is evenly heated from top to bottom gradually, and at the same time, the saturated steam is gradually condensed by the material layer and the hot water formed by the material layer continuously penetrates into the material tissue. During the process of steam diffusion and condensation, a good water dispersion effect is formed; with the continuous entry of water vapor and the action of the vacuum water pump, the oil-water mixed steam is introduced into the condenser through the steam outlet at the lower part of the material tank to fully condense, and the cooled oil-water The mixed liquid is received in the oil-water separator, and the crude product of the essential oil is obtained after being separated by the oil-water separator; the condensed small amount of condensed water containing the essential oil components in the material flows into the condensed water receiving tank through the material tank, and when a certain volume is received, it is extracted from it. Take it out, and separate the crude product of a small amount of essential oil therein through an oil-water separator. After 1.5 hours of extraction in this way, the two parts of the crude essential oil obtained above were combined, and after dehydration, decolorization, filtration and other refining processes, 3.15 g of the essential oil product was obtained. Collect about 800mL of the water phase after oil-water separation, and filter to obtain the flower water product.

Example 3

Put 5kg of half whole lavender plants evenly into the material distillation tank, the height of the filling is 80% of the distillation tank, and evenly compress to prevent the short circuit of the steam from the steam generator through the open steam coil or sieve plate The water vapor gradually heats the material layer from top to bottom evenly, and at the same time, the saturated steam is gradually condensed by the material layer, and the hot water formed by the material layer continuously penetrates into the material tissue, and the material forms a good water dispersion effect in the process of steam diffusion and condensation; With the continuous entry of water vapor and the action of the vacuum water pump, the oil-water mixed steam is introduced into the condenser through the steam outlet at the lower part of the material tank to fully condense, and the cooled oil-water mixed liquid is received in the oil-water separator and separated by the oil-water separator. The crude product of essential oil is obtained; the condensed small amount of condensed water containing essential oil components in the material flows into the condensed water receiving tank through the material tank, and is taken out when a certain volume is received, and a small amount of crude product of essential oil is separated by an oil-water separator. After 2 hours of extraction in this way, the two parts of crude essential oil obtained above were combined, and refined by dehydration, decolorization and filtration to obtain 47.5 g of essential oil product. Collect about 10 kg of the water phase after oil-water separation, and filter to obtain the flower water product.

Example 4

After crushing 500kg of lavender, put it evenly into the material distillation tank, the height of the filling is 80-90% of the distillation tank, and evenly compress it to prevent the short circuit of the steam from the steam generated by the open steam coil or sieve plate. The water vapor in the device evenly and gradually heats the material layer from top to bottom. At the same time, the saturated steam is gradually condensed by the material layer and the hot water formed by the material layer continuously penetrates into the material tissue. The material forms a good water dispersion effect in the process of steam diffusion and condensation. ;With the continuous entry of water vapor and the action of the vacuum water pump, the oil-water mixed steam is introduced into the condenser through the steam outlet at the lower part of the material tank to fully condense, and the cooled oil-water mixture is received in the oil-water separator and separated by the oil-water separator Finally, the crude product of essential oil is obtained; the condensed small amount of condensed water containing essential oil components in the material flows into the condensed water receiving tank through the material tank, and is taken out when a certain volume is received, and a small amount of crude product of essential oil is separated through the oil-water separator. After 2.5 hours of extraction in this way, the two parts of the crude essential oil obtained above were combined, and refined by dehydration, decolorization and filtration to obtain 5.36 kg of the essential oil product. Collect the water phase after the oil-water separation, and filter to obtain 1300kg flower water. After the distillation ends, collect 50kg of circulating water in the circulating water system, and filter it to become flower water.

Example 5

After crushing 5kg of hops, put them evenly into the material distillation tank, the height of the filling is 80-90% of the distillation tank, and evenly compress to prevent the short circuit of the steam from the steam generated by the open steam coil or sieve plate The water vapor in the device evenly and gradually heats the material layer from top to bottom. At the same time, the saturated steam is gradually condensed by the material layer and the hot water formed by the material layer continuously penetrates into the material tissue. The material forms a good water dispersion effect in the process of steam diffusion and condensation. ;With the continuous entry of water vapor and the action of the vacuum water pump, the oil-water mixed steam is introduced into the condenser through the steam outlet at the lower part of the material tank to fully condense, and the cooled oil-water mixture is received in the oil-water separator and separated by the oil-water separator Finally, the crude product of essential oil is obtained; the condensed small amount of condensed water containing essential oil components in the material flows into the condensed water receiving tank through the material tank, and is taken out when a certain volume is received, and a small amount of crude product of essential oil is separated through the oil-water separator. After 2 hours of extraction in this way, the two parts of crude essential oil obtained above were combined, and refined by dehydration, decolorization and filtration to obtain 139.5 g of essential oil product. Collect about 11 kg of the water phase after oil-water separation, and filter to obtain the flower water product.

Claims (10)

1. the equipment of a reduced steam distillation extraction spice berry essential oil is characterized in that comprising:

The wet distillation system, by steam generator, the material retort, condenser, water-and-oil separator and connecting pipeline are formed, be used for spice berry raw material properties according to essential oil to be extracted, controlling corresponding temperature and pressure changes in leaching process with the aroma component that reduces spice berry, after the distillation beginning, raw material is by the steam-heated cal(l)andria from steam generator, in heat-processed, the water vapour of heat constantly penetrates into and carries out the diffusing effect of water in the raw tissue, make wherein essential oil class volatile component and water vapour formation water and oily mixed vapour, this steam is after condenser condenses, distillate enters water-and-oil separator, can separated and collected obtain corresponding plants essential oil; Isolate the colored water that water is gained after filtering that distillates behind the essential oil;

Vacuum system is made up of vacuum unit or off-gas pump, pressure regulator valve and connecting pipeline etc., is used for the vapor pressure and the corresponding temperature of Controlling System.

2. equipment according to claim 1, the steam generator that it is characterized in that described reduced steam Distallation systm are steam boiler or the steamer with heating unit.

3. equipment according to claim 1, the material retort top that it is characterized in that described reduced steam Distallation systm is the steam admission port, the bottom is a vapor outlet port, and the bottom of retort is conical, is used for depositing a small amount of water of condensation that the still-process condensation is got off; The steam that steam generator produced of described reduced steam Distallation systm enters into the material retort by pipe connecting from top, and the steam coil by perforate or the sieve plate material that makes steam enter in the material pot equably to be loaded; Enter in the water-and-oil separator after condenser condenses through the steam behind the distilling material.

4. equipment according to claim 1 is characterized in that the vacuum system of described reduced steam Distallation systm is made up of vacuum unit, pressure regulator valve and connecting pipeline; For reducing the volatile component loss in the material, protection vacuum unit need be installed cold-trap, drying tower, acid absorption column and hydrocarbons absorption tower in the middle of the pipeline that the vacuum unit is connected with condenser.

5. equipment according to claim 1, the vacuum system that it is characterized in that described reduced steam Distallation systm are by jet-type vacuum unit, and pressure regulator valve and connecting pipeline are formed.

6. equipment according to claim 1 is characterized in that the vacuum system of described reduced steam Distallation systm is used vacuum pump by the circulation ability of swimming more, and pressure regulator valve and connecting pipeline are formed.

7. equipment according to claim 1, it is characterized in that the equipment of described reduced steam distillation extraction spice berry essential oil can pass through the vacuum tightness of the simple adjustment Controlling System of vacuum system by-pass valve control, flexible and convenient operation, to adapt to different properties spices extracts essential oil, be a general-purpose equipment with spice berry essential oil production of broad applicability.

8. the method for a reduced steam distillation extraction spice berry essential oil is characterized in that including following steps:

(1) spice berry to be extracted is crushed accordingly, cuts off, grinds according to the characteristic of material or break process after, pack into equably in the material retort, the characteristic that the height of charging and degree of tightness will be considered material itself, steam the dilatable material in back and should adorn the 70-80% that is equivalent to the retort volume, generally should fill in more than 80% of material retort volume to fresh feed, and note evenly compressing, prevent the steam short circuit;

(2) steam coil or the sieve plate by perforate makes water vapour progressively add thermal material layer equably from top to bottom, simultaneously the hot water that also progressively formed by bed of material condensation of saturated vapo(u)r constantly infiltrates material tissue, and material has formed good water and loose and act in the process of the heating of steam, diffusion, condensation; Along with constantly entering of water vapour, the vapor outlet port of profit mixed vapour through the material pot bottom imports in the condenser, and cooling promptly obtains needed essential oil after water-and-oil separator separates, and isolated water is Hua Shui; The water of condensation that contains derived essential oil in the material on a small quantity that is condensed flows in the water of condensation receiving tank through material pot, therefrom take out when waiting to receive certain volume, through water-and-oil separator separation a small amount of essential oil wherein, after handling, decolouring obtains required essential oil, and isolated water is Hua Shui;

(3) in order to reduce the loss of fragrance material, vacuum pump adopts the circulation ability of swimming, recirculated water has dissolved the perfume composition that gets off without the condenser total condensation in a large number in the resulting recirculated water after recycling in 6-8 hour, collect promptly to obtain required colored fishery products after this part recirculated water filters.

9. method according to claim 6, it is characterized in that in the method for described reduced steam distillation extraction spice berry essential oil, import from the saturated steam of steam generator top from retort, contact the water of condensation receptor that a small amount of water of condensation that the back condensation gets off has directly entered into the retort bottom with spice berry, avoided because heat steam enters from the bottom, the water of condensation that contains the volatile component in the material that cools down is earlier heated repeatedly and makes aroma component wherein that bad change take place.

10. method according to claim 6 is characterized in that the method for described reduced steam distillation extraction spice berry essential oil can be widely used in the extraction of the volatile essential oil composition of the various natural phant that comprise lavandula angustifolia, rose, Thymus vulgaris, Herba Dracocephali, tonka bean camphor, hops, Radix Angelicae Sinensis, Xinjiang Jehol Ligusticum Rhizome, saussurea involucrata, Chinese ephedra, A Wei, Herba Sophorae alopecuroidis, sweet basil, peppermint etc.