CN112683042A - Drying and sterilizing integrated device and method for traditional Chinese medicine decoction pieces - Google Patents
Drying and sterilizing integrated device and method for traditional Chinese medicine decoction pieces Download PDFInfo
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Abstract
The application relates to a drying and sterilizing integrated device and a method for Chinese herbal pieces, wherein the device comprises a drying device, a sterilizing device and a detecting device; the drying device comprises a microwave generator, and the sterilizing device comprises a radio frequency generator and a hot air device; the low-frequency microwave is selected for drying treatment, so that the microwave dryer has the advantages of high penetrating power, easiness in power regulation and control, good drying uniformity and the like, can better save energy, reduce emission and reduce drying time; but also can reduce the loss of effective components in the drying process of the traditional Chinese medicine decoction pieces; the radio frequency-hot air combined sterilization mode is selected, the applicability is wide, the stability is good, and large batches of materials are easy to process.
Description
Technical Field
The application belongs to the field of processing of traditional Chinese medicine decoction pieces, and particularly relates to a drying and sterilizing integrated device and method for traditional Chinese medicine decoction pieces.
Background
The production process of the traditional Chinese medicine decoction pieces generally comprises a series of processes of cleaning, softening, cutting, drying, processing, blending and the like of traditional Chinese medicines, wherein water is the most basic element for controlling the quality of the traditional Chinese medicine decoction pieces, the water content of the traditional Chinese medicine decoction pieces is controlled to be 7-13%, and the decoction pieces with overhigh water content are easy to generate worms and mildew in the storage process, so that the decomposition and deterioration of active ingredients of the medicines are caused, the treatment effect is influenced, the water content is overlow, the decoction pieces are easy to break, and the appearance character quality is influenced; because the traditional Chinese medicine decoction pieces are various in variety and different in property, and the requirements on the water content of different processed products are different, the traditional Chinese medicine decoction pieces are dried by adopting a proper method according to the property of the decoction pieces, so that the method is an important means for ensuring the quality of the traditional Chinese medicine decoction pieces.
At present, the traditional Chinese medicine decoction pieces are mostly sterilized by a conventional thermal sterilization method, heat is transferred from the surface of a material to the interior of the material by means of heat conduction, convection or radiation, and the steps of the sterilization method are complicated, and the physicochemical properties of the traditional Chinese medicine decoction pieces are damaged more or less; for example, the moist heat sterilization method is performed under high temperature and high heat conditions, which easily results in the loss of the content of active ingredients in the decoction pieces; the sterilization time of the dry heat sterilization method varies with the types, the quantities and the loading modes of the decoction pieces, and is difficult to control, so that the materials are often burnt and scorched in the mass production.
Different from external heating modes such as hot air, steam, electric heating and the like, the microwave drying utilizes the high-frequency transformation of the direction of a magnetic field to enable polar molecules in the material to generate motion and friction, so that heat is generated, the material becomes a heating body during microwave drying, the temperature in the material and the temperature on the surface of the material are rapidly increased at the same time, and the heat conduction direction is the same as the moisture diffusion direction; for sterilization, it is a dual sterilization function of the thermodynamic effect and the biological effect of the electromagnetic field; on one hand, the heating of bacteria and protein in a high-frequency alternating electric field can cause the concentration and dissolution of cell nucleus, the shrinkage and disintegration of cells, and the heating, solidification and death of protein, thereby achieving the purpose of sterilization; on the other hand, in the alternating electromagnetic field, bacteria have strong electric property reaction, the potential distribution of the cell membrane section, the electron and ion concentration around the cell membrane are changed, and the cell membrane with a capacitive structure is broken down and broken; meanwhile, the ion channel on which the bacteria live can cause regulatory dysfunction, bacterial structural dysfunction and growth inhibition, thereby causing bacterial death.
However, the medicinal materials in different forms have different degrees of absorbing microwave energy, so that the sterilization is not thorough, and the common microwave sterilization has poor sterilization effect and is difficult to control because the water content of the materials to be sterilized is only about 7-13%.
The existing drying and sterilizing device and sterilizing method commonly used in the production process of traditional Chinese medicines have defects or imperfections of different degrees, if the drying and sterilizing integrated continuous operation cannot be realized, the operation is complicated, and the energy consumption is high; poor drying and sterilizing effect, loss of effective components, unsuitability for drying and sterilizing large-batch materials and the like, and the quality stability and the uniformity of the traditional Chinese medicine decoction pieces are poor.
Disclosure of Invention
In order to solve the above-mentioned not enough of prior art existence, this application provides a herbal pieces-drying and sterilizing integrated device.
The technical scheme that this application solved its technical problem adopts is, this application provides a herbal pieces-drying and sterilizing integrated device.
Specifically, the invention provides a drying and sterilizing integrated device for traditional Chinese medicine decoction pieces, which comprises: the drying device comprises a drying cavity and a microwave generator, the microwave generator is arranged at the upper part of the drying cavity, and the drying device is used for drying the traditional Chinese medicine decoction pieces;
the sterilization device comprises a sterilization cavity, a radio frequency generator, an upper polar plate, a lower polar plate and a hot air device, wherein the radio frequency generator is arranged at the upper part of the sterilization cavity, the upper polar plate is arranged at the upper position in the sterilization cavity, the lower polar plate and the upper polar plate are correspondingly arranged at the lower position in the sterilization cavity, the upper polar plate and the lower polar plate are both connected with the radio frequency generator, the hot air device is arranged at the lower part of the sterilization cavity, and the sterilization device is used for sterilizing traditional Chinese medicine decoction pieces; preferably, the radio frequency generator is 27.12MHz, and the distance between the upper polar plate and the lower polar plate can be adjusted through the upper polar plate;
wherein the detection means are used for detecting a drying result and/or a sterilization result.
Preferably, drying device still includes dehumidification fan and first temperature sensor, and microwave generator and dehumidification fan are installed on drying chamber upper portion, and first temperature sensor installs inside drying chamber, drying chamber's side is provided with the window.
Preferably, the sterilization device further comprises a second temperature sensor, the second temperature sensor is installed inside the sterilization cavity, and a window is arranged on the side face of the sterilization cavity.
Preferably, the detection device comprises a detection cavity and an infrared probe, the infrared probe is mounted on the detection cavity, and the infrared probe is an infrared diffuse reflection type probe.
Preferably, the drying device comprises four groups of microwave generators, and the four groups of microwave generators are all arranged on the upper part of the drying cavity and are uniformly distributed in parallel; more preferably, 915MHz low-frequency microwaves are selected as each group of microwave generators, and the power is adjustable from 0 kW to 5 kW.
Furthermore, the integrated device for drying and sterilizing the traditional Chinese medicine decoction pieces further comprises a feeding device, a discharging device, a conveying device and a control device; the feeding device comprises a feeding hopper, and the discharging device comprises a discharging hopper;
the feed hopper, the drying cavity, the detection cavity, the sterilization cavity and the discharge hopper are sequentially arranged in front and back;
the conveying device comprises a variable frequency motor and a conveying belt, wherein the variable frequency motor is used for controlling the speed of the conveying belt, and the conveying device is used for conveying materials among the feeding hopper, the drying cavity, the detection cavity, the sterilization cavity and the discharging hopper;
wherein the control system is electrically connected with the feeding device, the drying device, the detection device, the sterilization device, the conveying device and the discharging device and is used for controlling the operation of the system.
The second aspect of the present invention also provides a method for drying and sterilizing decoction pieces of traditional Chinese medicine by using the integrated drying and sterilizing device for decoction pieces of traditional Chinese medicine of the present invention, comprising the following steps:
(1) putting the materials into a drying device;
(2) and (3) drying: feeding the material into a drying cavity, setting the power of a microwave generator, the final drying temperature and the drying time, and then starting drying;
(3) and (3) detection: after drying, detecting whether the water content of the material reaches a target value, if not, returning to the step (2) to continue drying until the water content of the material reaches the target value;
(4) and (3) sterilization: feeding the material with the water content reaching the target value obtained in the step (3) into a sterilization device, setting the distance between an upper polar plate and a lower polar plate, the sterilization final temperature, the air inlet amount and the sterilization time, and then starting sterilization;
(5) and (3) detection: and (4) after the sterilization is finished, detecting whether the sterilization result of the material reaches a target value, if not, returning to the step (4) to continue the sterilization until the sterilization result of the material reaches the target value, and obtaining the dried and sterilized material.
In the method, preferably, the microwave generators in the step (2) are 4 groups of 915MHz low-frequency microwave generators, and the power is 0-5 kW; the final drying temperature and the drying time can be flexibly adjusted and set according to the types, the quantity, the attributes, the standard requirements and the like of different traditional Chinese medicine decoction pieces; in the present invention, for example, the final drying temperature may be 20 to 100 ℃, preferably 40 to 80 ℃.
Preferably, the water content of the material to be detected in the step (3) is obtained by collecting near infrared spectrum analysis and calculating, wherein the spectrum scanning range is 4000-12500 cm-1The number of scanning times is 32, and the resolution is 8cm-1。
Further preferably, the radio frequency generator in step (4) is 27.12MHz, wherein the distance between the upper plate and the lower plate is smaller,The final sterilization temperature, the intake air amount and the sterilization time are flexibly adjusted according to the type (such as rhizome type decoction pieces, flower type decoction pieces, leaf type decoction pieces and the like), the quantity, the property, the standard requirement (as specified in pharmacopoeia) and the target value (such as biological limit inspection) set by drying and sterilization of the detected materials (namely the traditional Chinese medicine decoction pieces). For example, in the present invention, the intake of the hot air system can be set to 0-2m3And/s, the air inlet temperature is set to be 30-80 ℃, the distance between the upper polar plate and the lower polar plate is 1-200 mm, preferably 10-100 mm, and the final sterilization temperature is 20-200 ℃, preferably 30-80 ℃.
The detection material is traditional Chinese medicine decoction pieces or traditional Chinese medicinal materials, the water content of the traditional Chinese medicine decoction pieces is controlled to be 7% -13%, the sterilization result reaches the target value, the biological limit inspection after sterilization is carried out, different types of traditional Chinese medicine decoction pieces are dried and sterilized, and the target value of the water content and the biological limit after sterilization are usually different. Generally, each herbal piece has its associated quality standard, such as quality standard of herbal piece, pharmacopoeia specification, etc., in order to satisfy the safety and effectiveness of herbal piece, therefore, in order to satisfy the property of herbal piece, when the method of the present invention is used, a suitable target value of water content can be set according to the quality requirement of each herbal piece, for example, the target value of water content of material can be set to be less than or equal to 10%.
The target value of the sterilization result refers to whether the biological limit inspection meets the microbial limit standard of the traditional Chinese medicine extract and the traditional Chinese medicine decoction pieces.
The settings of the sterilization time, the sterilization temperature, the final drying temperature and the drying time are adaptively adjusted according to the difference of the varieties, the quantities and the quality standards of the decoction pieces, such as the water content, the biological limit requirements and the like.
The beneficial effect of this application is:
the drying and sterilizing integrated device and method for the traditional Chinese medicine decoction pieces are beneficial to realizing the continuity of processing of the traditional Chinese medicine decoction pieces; 915MHz low-frequency microwaves are selected for drying treatment, and the microwave dryer has the advantages of high penetrating power, easiness in power regulation, good drying uniformity and the like; the energy can be saved, the emission can be reduced better, and the drying time can be shortened; and can reduce the loss of effective components in the drying process of the traditional Chinese medicine decoction pieces; the radio frequency-hot air combined sterilization mode is selected, so that the applicability is wide, the stability is good, and large batches of materials are easy to process; and for materials with low moisture content, the radio frequency-hot air combined sterilization mode also has a drying effect, and the treatment mode is softer.
Drawings
The technical solution of the present application is further explained below with reference to the drawings and the embodiments.
FIG. 1 is a schematic view of an integrated drying and sterilizing apparatus for herbal pieces of Chinese medicine according to the present application;
the reference numbers in the figures are:
1: feed hopper
2: microwave generator
3: drying chamber
4: window
5: dehumidification fan
6: infrared probe
7: detection cavity
8: radio frequency generator
901: upper polar plate
902: lower plate
10: window
11: sterilization chamber
12: variable frequency motor
13: conveyor belt
14: hot air device
15: discharge hopper
16: control system
1701: first optical fiber temperature measuring probe
1702: second optical fiber temperature measuring probe
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be considered limiting of the scope of the present application. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention of the present application, the meaning of "a plurality" is two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art through specific situations.
Example 1
The embodiment provides a drying and sterilizing integrated device for traditional Chinese medicine decoction pieces, as shown in fig. 1, comprising: a feeding device, a drying device, a detection device, a sterilization device, a discharging device, a conveying device and a control system 16; wherein the feeding device comprises a feed hopper 1, and the discharging device comprises a discharging hopper 15; the drying device comprises a drying cavity 3 and four groups of microwave generators 2, wherein the four groups of microwave generators 2 are all arranged on the upper part of the drying cavity 3 and are uniformly distributed in parallel, the drying device also comprises a dehumidifying fan 5 and a first temperature measuring sensor 1701, the microwave generators 2 and the dehumidifying fan 5 are arranged on the upper part of the drying cavity 3, the first temperature measuring sensor 1701 is arranged in the drying cavity 3, and a window 4 is arranged on the side surface of the drying cavity 3; the detection device comprises a detection cavity 7 and an infrared probe 6, wherein the infrared probe 6 is a diffuse reflection type probe, and the infrared probe 6 is arranged on the detection cavity 7; the sterilization device comprises a sterilization cavity 11, a radio frequency generator 8, an upper polar plate 901, a lower polar plate 902 and a hot air device 14, wherein the radio frequency generator 8 is installed at the upper part of the sterilization cavity 11, the upper polar plate 901 is installed at the upper position inside the sterilization cavity 11, the lower polar plate 902 and the upper polar plate 901 are correspondingly installed at the lower position inside the sterilization cavity 11, the upper polar plate 901 and the lower polar plate 902 are both connected with the radio frequency generator 8, the hot air device 14 is installed at the lower part of the sterilization cavity 11, the sterilization device further comprises a second temperature measurement sensor 1702, the second temperature measurement sensor 1702 is installed inside the sterilization cavity 11, a window 10 is arranged on the side surface of the sterilization cavity 11, the conveying device comprises a variable frequency motor 12 and a conveying belt 13, the variable frequency motor 12 is used for controlling the speed of the conveying belt 13, and the conveying device is used for conveying materials among a feeding hopper; wherein the control system is electrically connected with the feeding device, the drying device, the detection device, the sterilization device, the conveying device and the discharging device and is used for controlling the operation of the system.
In this embodiment, the feed hopper 1, the drying chamber 3, the detection chamber 7, the sterilization chamber 11, and the discharge hopper 15 are arranged in sequence.
When the embodiment is operated, the method comprises the following steps:
the material taking device is placed in a feed hopper 1, a conveyor belt 13 is started through a control system 16, and the material is conveyed into a microwave drying cavity 3; after the material enters the microwave drying cavity 3, the microwave power, the final microwave drying temperature and the drying time are set, and the drying is started.
After drying, the conveyor belt 13 inputs a certain amount of materials into the detection cavity 7 to perform near infrared spectrum collection and analyze the water content of the materials, wherein the spectrum scanning range is 4000-12500 cm-1The number of scanning times is 32, and the resolution is 8cm-1Spectrum collection is carried out by taking the background arranged in the detection cavity 7 as a reference; if the water content is more than 10 percent, returning to the microwave drying cavity 3 for continuous drying until the water content of the material is less than 10 percent; if material isAnd (5) sterilizing when the water content is less than or equal to 10%.
In the sterilization process, the space between the polar plates, the final temperature of radio frequency sterilization, the air inlet temperature, the air inlet amount and the sterilization time need to be set, wherein the radio frequency generator adopts 27.12MHz, and the space between the polar plates can be adjusted by the upper polar plate 902; the air inlet volume of the hot air system is 0-2m3And the air inlet temperature is 30-80 ℃.
When the sterilization mode is finished, the variable frequency motor 12 rotates reversely, a certain amount of materials are input into the detection cavity 7 for microbial limit inspection, and if the microbial limit is less than or equal to a target value, the whole process is finished; if the microbial limit is greater than the target value, the 'sterilization mode' continues to operate until the microbial limit of the material is below the target value.
Example 2: root and rhizome decoction pieces, for example, Chuan Xiong
Taking 100kg of rhizoma Ligustici Chuanxiong decoction pieces (the detection result of microbial limit is 50000cfu/g and 10000cfu/g for bacteria and mould respectively), and conveying the material in the feed hopper into a microwave drying chamber by starting a conveyor belt through a control system; setting the microwave power density at 0.1-0.15w/g, the final temperature of microwave drying at 60-65 deg.C for 45-50min, and drying.
After drying is finished, a certain amount of materials are input into the detection cavity by the conveyor belt to be subjected to near infrared spectrum collection and the water content of the materials is analyzed, wherein the spectrum scanning range is 4000-12500 cm-1The number of scanning times is 32, and the resolution is 8cm-1Taking the background in the detection cavity as a reference to perform spectrum acquisition; if the water content of the material is more than 10 percent, returning the material to the microwave drying cavity for continuous drying until the water content of the material is less than 10 percent; if the water content of the material is less than or equal to 10 percent, starting a sterilization mode. In the sterilization process, the space between the polar plates is set to be 60-80mm, the final temperature of the radio frequency sterilization material is set to be 70 ℃, the air inlet temperature is set to be 65-68 ℃, and the air inlet volume is set to be 1.2-1.5m3And the sterilization time is 280-300 s.
When the sterilization mode is finished, the variable frequency motor rotates reversely, a certain amount of materials are input into the detection cavity for microbial limit detection, and if the microbial limit is less than or equal to a target value (the bacterial content is 1500cfu/g, and the mould is 0cfu/g), the whole process is finished; if the microbial limit is greater than the target value (bacteria content 1500cfu/g, mold 0cfu/g), the "sterilization mode" continues until the material microbial limit is below the target value.
Example 3: flower decoction pieces, for example, honeysuckle flower
Taking 100kg of honeysuckle according to production batches (the detection result of the microbial limit is that the contents of bacteria and mould are 15000cfu/g and 20000cfu/g respectively), starting a conveyor belt through a control system, and feeding the material in a feed hopper into a microwave drying cavity; setting the microwave power density at 0.08-0.10w/g, the final microwave drying temperature at 50-55 deg.C, drying for 30-35min, and drying.
After drying is finished, a certain amount of materials are input into the detection cavity by the conveyor belt to be subjected to near infrared spectrum collection and the water content of the materials is analyzed, wherein the spectrum scanning range is 4000-12500 cm-1The number of scanning times is 32, and the resolution is 8cm-1Taking the background in the detection cavity as a reference to perform spectrum acquisition; if the water content of the material is more than 10 percent, returning the material to the microwave drying cavity for continuous drying until the water content of the material is less than 10 percent; if the water content of the material is less than or equal to 10 percent, starting a sterilization mode. In the sterilization process, the space between the polar plates is 40-60mm, the final temperature of the radio frequency sterilization material is 50 ℃, the air inlet temperature is 45-48 ℃, and the air inlet volume is 0.8-1.2m3And the sterilization time is 280-300 s.
When the sterilization mode is finished, the variable frequency motor rotates reversely, a certain amount of materials are input into the detection cavity for microbial limit detection, and if the microbial limit is less than or equal to a target value (the bacterial content is 1000cfu/g, and the mould is 0cfu/g), the whole process is finished; if the microbial limit is greater than the target value (bacteria content 1000cfu/g, mold 0cfu/g), the "sterilization mode" continues until the material microbial limit is below the target value.
Example 4: leaf decoction pieces, exemplified by loquat leaf
Taking 100kg of loquat leaves according to production batches (the microbial limit detection result shows that the contents of bacteria and mold are 25000cfu/g and 10000cfu/g respectively), starting a conveyor belt through a control system, and conveying the materials in a feed hopper into a microwave drying cavity; setting the microwave power density at 0.08-0.10w/g, the final microwave drying temperature at 50-55 deg.C, drying for 30-35min, and drying.
After drying is finished, a certain amount of materials are input into the detection cavity by the conveyor belt to be subjected to near infrared spectrum collection and the water content of the materials is analyzed, wherein the spectrum scanning range is 4000-12500 cm-1The number of scanning times is 32, and the resolution is 8cm-1Taking the background in the detection cavity as a reference to perform spectrum acquisition; if the water content of the material is more than 10 percent, returning the material to the microwave drying cavity for continuous drying until the water content of the material is less than 10 percent; if the water content of the material is less than or equal to 10 percent, starting a sterilization mode. In the sterilization process, the distance between the polar plates is set to be 20-40mm, the final temperature of the radio frequency sterilization material is 50 ℃, the air inlet temperature is 45-48 ℃, and the air inlet volume is 0.8-1.2m3And the sterilization time is 240-300 s.
When the sterilization mode is finished, the variable frequency motor rotates reversely, a certain amount of materials are input into the detection cavity for microbial limit detection, and if the microbial limit is less than or equal to a target value (the bacterial content is 500cfu/g, and the mould is 100cfu/g), the whole process is finished; if the microbial limit is > the target value (bacteria content 500cfu/g, mould 100cfu/g), the "sterilization mode" continues until the material microbial limit is below the target value.
EXAMPLE 5 Effect of Integrated drying and Sterilization method
Examples 2-4 the drying and sterilizing effects of the three examples are shown in table 1 below:
TABLE 1 Dry Sterilization Effect of the three examples
Example 6 comparative testing of conventional Dry Sterilization Process with the Process according to the invention
The comparative test results of several drying and sterilizing methods using honeysuckle as an example are shown in table 2.
Table 2: comparative test results of several drying and sterilizing methods for gold and silver medicinal materials
In light of the foregoing description of the preferred embodiments according to the present application, it is to be understood that various changes and modifications may be made without departing from the spirit and scope of the invention. The technical scope of the present application is not limited to the contents of the specification, and must be determined according to the scope of the claims.
Claims (10)
1. A herbal pieces-drying sterilization integrated device, its characterized in that includes: a drying device, a sterilizing device and a detecting device;
the drying device comprises a drying cavity and a microwave generator, wherein the microwave generator is arranged at the upper part of the drying cavity;
the sterilization device comprises a sterilization cavity, a radio frequency generator, an upper polar plate, a lower polar plate and a hot air device, wherein the radio frequency generator is arranged at the upper part of the sterilization cavity, the upper polar plate is arranged at the upper position in the sterilization cavity, the lower polar plate and the upper polar plate are correspondingly arranged at the lower position in the sterilization cavity, the upper polar plate and the lower polar plate are both connected with the radio frequency generator, and the hot air device is arranged at the lower part of the sterilization cavity;
the detection device is used for detecting a drying result and/or a sterilization result.
2. The integrated drying and sterilizing device for herbal pieces-prepared for chinese traditional medicine according to claim 1, wherein the drying device further comprises a dehumidifying fan and a first temperature sensor, the microwave generator and the dehumidifying fan are installed on the upper portion of the drying chamber, the first temperature sensor is installed inside the drying chamber, and a window is provided on the side of the drying chamber.
3. The integrated drying and sterilizing device for Chinese herbal pieces according to claim 1, wherein the sterilizing device further comprises a second temperature sensor installed inside the sterilizing chamber, and a window is disposed on a side surface of the sterilizing chamber.
4. The integrated drying and sterilizing device for Chinese herbal pieces according to claim 1, wherein the detecting device comprises a detecting cavity and an infrared probe, the infrared probe is mounted on the detecting cavity, and the infrared probe is an infrared diffuse reflection type probe.
5. The integrated drying and sterilizing device for Chinese herbal pieces according to claim 1, wherein the drying device comprises four sets of microwave generators, and the four sets of microwave generators are all arranged on the upper part of the drying chamber and are distributed in parallel and uniformly.
6. The integrated drying and sterilizing device for Chinese herbal pieces according to claim 5, wherein 915MHz low-frequency microwaves are selected as each group of microwave generators.
7. The integrated drying and sterilizing device for Chinese herbal pieces according to claim 1, wherein the RF generator is 27.12 MHz.
8. The integrated drying and sterilizing device for Chinese herbal pieces according to any one of claims 1 to 7, further comprising a feeding device, a discharging device, a conveying device and a control device;
the feeding device comprises a feeding hopper, and the discharging device comprises a discharging hopper;
the feed hopper, the drying cavity, the detection cavity, the sterilization cavity and the discharge hopper are sequentially arranged in front and back;
the conveying device comprises a variable frequency motor and a conveying belt, the variable frequency motor is used for controlling the speed of the conveying belt, and the conveying device is used for conveying materials among the feeding hopper, the drying cavity, the detection cavity, the sterilization cavity and the discharging hopper;
the control system is electrically connected with the feeding device, the drying device, the detection device, the sterilization device, the conveying device and the discharging device and used for controlling the operation of the system.
9. A method for drying and sterilizing traditional Chinese medicine decoction pieces by using the integrated device for drying and sterilizing traditional Chinese medicine decoction pieces of claim 1, which is characterized by comprising the following steps:
(1) putting the materials into a drying device;
(2) and (3) drying: feeding the material into a drying cavity, setting the power of a microwave generator, the final drying temperature and the drying time, and then starting drying;
(3) and (3) detection: after drying, detecting whether the water content of the material reaches a target value, if not, returning to the step (2) to continue drying until the water content of the material reaches the target value;
(4) and (3) sterilization: feeding the material with the water content reaching the target value obtained in the step (3) into a sterilization device, setting the distance between an upper polar plate and a lower polar plate, the sterilization final temperature, the air inlet amount and the sterilization time, and then starting sterilization;
(5) and (3) detection: and (4) after the sterilization is finished, detecting whether the sterilization result of the material reaches a target value, if not, returning to the step (4) to continue the sterilization until the sterilization result of the material reaches the target value, and obtaining the dried and sterilized material.
10. The method according to claim 8, wherein the microwave generators in the step (2) are 4 groups of 915MHz low-frequency microwave generators, and the power is 0-5 kW;
preferably, the water content of the material to be detected in the step (3) is obtained by collecting near infrared spectrum and calculating, and the spectrum scanning range is 4000-12500 cm-1The number of scanning times is 32, and the resolution is 8cm-1；
Preferably, the radio frequency generator in the step (4) selects 27.12MHz, and the air inlet volume of the hot air system is 0-2m3And the air inlet temperature is 30-80 ℃.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115554161A (en) * | 2022-09-30 | 2023-01-03 | 四川省中药饮片有限责任公司 | A fresh-cut and pressed treatment process of Chinese herbal decoction pieces |
| CN118066799A (en) * | 2024-02-23 | 2024-05-24 | 北京五洲木国际实业有限公司 | A processing technology for Chinese herbal medicine |
| WO2024229725A1 (en) * | 2023-05-10 | 2024-11-14 | 江苏省农业科学院 | Combined continuous plasma and radio frequency low-temperature cold sterilization device |
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