CN116271955A

CN116271955A - A green and safe preparation method of Ginseng radix extract

Info

Publication number: CN116271955A
Application number: CN202310243918.8A
Authority: CN
Inventors: 邵云东; 程勇; 李若鹏
Original assignee: Zhejiang Skyherb Biotechnology Inc
Current assignee: Zhejiang Skyherb Biotechnology Inc
Priority date: 2023-03-15
Filing date: 2023-03-15
Publication date: 2023-06-23

Abstract

The invention discloses a preparation method of a green and safe ginseng extract, which comprises the steps of dissolution, extraction, primary concentration, purification, secondary concentration, tiling drying, stripping, heating in a conveying area, secondary drying and crushing. According to the invention, the ginseng extract is extracted for at least six times by utilizing an organic solvent, and then the pesticide residue is adsorbed and refined and purified by resin, so that the pesticide residue removal rate can reach more than 99.9%, the European standard and the American standard are reached, the operation is simple, the cost is low, the control is easy, and the dispersion degree of the powdery ginseng extract is improved by adopting tiling drying, stripping, secondary drying and crushing.

Description

A green and safe preparation method of Ginseng radix extract

Technical Field

The invention relates to the field of extraction processes, in particular to a green and safe preparation method of a ginseng extract.

Background

With the development of agricultural industrialization, the production of agricultural products increasingly depends on exogenous substances such as antibiotics and organic pesticides, and the use of a large amount of pesticides inevitably leads to the problem of pesticide residue overstandard of the agricultural products, influences the edible safety of consumers, and seriously endangers the lives of the consumers. In addition, many countries have strict limits on the pesticide residue in natural plant products, and exceeding pesticide residues directly affects export and foreign exchange of products, which causes trade problems.

Ginseng is a plant of Araliaceae, is a rare traditional Chinese medicine, is named as 'Baicaowang', has the effects of reinforcing primordial qi, restoring pulse, strengthening spleen, tonifying lung, soothing nerves, improving intelligence, reducing blood sugar, improving immunity and the like, and the main active ingredient is ginsenoside, as well as other crops, the ginseng is often affected by diseases and insect pests in the cultivation process, pesticide spraying is still a main effective means for preventing and treating the diseases and insect pests of the traditional Chinese medicine at present, the growth period of the ginseng is longer, the specific surface area of the ginseng whisker contacted with soil is large, so that compared with common crops, the pesticide residue of the ginseng is much higher, and the ginseng extract is a product after further concentration, wherein the pesticide residue is higher.

The pesticide residues in ginseng are mainly organic chlorine, organic phosphorus and pyrethroid, and the residual components are easily dissolved in organic solvents but not dissolved in water, so that the simplest method for feeding the ginseng into the pesticide residues at present is to repeatedly extract the ginseng by using the organic solvents, and spray-drying the ginseng to obtain a final product after the extraction is finished.

Disclosure of Invention

The invention aims to solve the problems in the background technology and provides a green and safe preparation method of ginseng extract.

The technical aim of the invention is realized by the following technical scheme:

a green and safe preparation method of ginseng extract comprises the following steps:

s1, dissolving: adding water and organic solvent into the ginseng crude extract, stirring and heating to above 75-85 ℃, preserving heat for 15-25 min, and continuously stirring during the period;

s2, extraction: slowly adding an organic solvent, continuously stirring for 1.5-2.5 h, standing for 1.5-2.5 h, discharging the organic layer when obvious delamination occurs between the organic layer and the water layer, and continuously extracting for at least six times; dissolving the bottom extract with water, and recycling the organic layer;

s3, primary concentration: removing residual organic solvent in the bottom extract with a concentrator to obtain Ginseng radix extract concentrate;

s4, purifying: passing the Ginseng radix extract concentrate through macroporous resin, and collecting effluent;

s5, secondary concentration: concentrating the effluent according to the method of the step S3;

s6, tiling and drying: carrying out spreading drying while conveying the effluent obtained through the secondary concentration in the step S5 through a conveying drying area of a drying device to obtain a crisp ginseng extract;

s7, stripping: cutting, scattering and stripping the ginseng extract subjected to the tiling drying in the step S6 through a scattering area of drying equipment to obtain a blocky ginseng extract;

s8, heating in a conveying area: conveying the steam generated after the step S6 of tiling and drying to a conveying area of drying equipment, so that the conveying area is heated;

s9, secondary drying; carrying out secondary drying while conveying the blocky ginseng extract through a heated conveying area;

s10, crushing, namely crushing the ginseng extract subjected to the conveying and drying in the step S9 through a crushing area of a drying device to obtain powdery ginseng extract.

According to the invention, the ginseng extract is extracted for at least six times by utilizing the organic solvent, and then the pesticide residue is adsorbed and refined and purified by the resin, so that the pesticide residue removal rate can reach more than 99.9%, the European standard and the American standard are reached, the operation is simple, the cost is low, and the control is easy.

The invention adopts the steps of flat drying, stripping, secondary drying and crushing, thereby improving the dispersity of the powdery ginseng extract.

According to the invention, the steam generated after the flat drying is conveyed to the conveying area of the drying equipment, so that the conveying area is heated, secondary drying is performed, the steam generated after the flat drying is fully used, the resource recycling is realized, the purpose of energy saving is realized, the economic benefit is improved, and the whole process is more environment-friendly.

In the prior art, a great deal of loss of ginseng extract is caused by repeated transfer and separation of the organic layer and the aqueous layer during extraction. In order to solve the problem, the ginseng crude extract is prepared into the extractum with poor fluidity by controlling the water adding amount in the dissolving step, so that the stability of the extractum is improved, the extractum is not easy to be driven when being separated from an organic layer, and the layer separation loss is reduced; and unlike conventional extraction, the lower layer is released first, and the organic layer in the upper layer is released during the extraction, so that the water phase layer is not required to be transferred in the whole extraction process, and the transfer loss is avoided. Preferably, when the organic layer is extracted and discharged each time, a part of the organic layer is reserved in the extraction device, and the condition that the liquid level of the bottom extract is not exposed is taken as the basis, so that the loss of the ginseng crude extract during the separation of the two layers can be completely avoided, and the reserved part of the organic layer can be completely removed through the subsequent concentration for two times. More preferably, in the last extraction, after the organic layer is discharged, a water layer is slowly injected, so that the organic layer reserved in the extraction device is transferred from the surface of the extract to the surface of the water layer, the organic layer can be simply removed, the water layer and the extract layer are relatively stable, and even if the extract component enters the water layer, the transfer of the organic layer is far slower than that of the organic layer, therefore, the operation can ensure the low loss of the ginseng extract and simultaneously reduce the residual quantity of the organic reagent to the minimum. Therefore, the present invention has high recovery rate (70% or more), low organic reagent residue (ethyl acetate residue 10ppm or less), and good safety even though the extraction is performed several times.

In the first step, a small amount of 100% organic solvent is added for pre-removal except water, heating and stirring are adopted to accelerate the dissolution, meanwhile, a good pre-removal effect can be obtained, the removal difficulty of the subsequent extraction is reduced, and the subsequent extraction only needs to use more than 97% organic solvent.

The high pesticide residue component is removed by distillation after the organic solvent is extracted, and the solvent is continuously used as the solvent for the next extraction, so that the solvent can be circularly sleeved, and the time and the reagent consumption cost are greatly saved.

Preferably, the drying equipment comprises a box body, the top lid of box has the lid, be equipped with the frame in the box body, the frame is equipped with spouting material district, conveying drying district, break up district, secondary drying district from left to right in proper order, the top of box is equipped with the gas outlet, secondary drying district is equipped with intake pipe and outlet pipe, the gas outlet with be equipped with the aspiration pump between the intake pipe, the air suction nozzle of aspiration pump with the gas outlet is connected, the air suction nozzle of aspiration pump with intake-tube connection, the bottom in secondary drying district still is equipped with crushing jar.

According to the invention, the materials are sprayed out through the spraying area and conveyed through the conveying drying area, so that the materials are flatly paved on the conveying belt for conveying and drying, then are primarily scattered through the scattering area, then are dried again through the secondary drying area, and are dispersed through the crushing tank, so that the dispersity of ginseng extracts is improved, and meanwhile, steam generated in the conveying drying area is conveyed to the secondary drying area for secondary use, thereby realizing resource recycling, realizing the purpose of energy conservation and improving the thermal efficiency.

Preferably, the secondary drying zone is including open-top's collection case, inside hollow rotation axis, fixed pipe, outlet duct, helical blade, the rotation axis is established collection case's inner chamber, fixed pipe cover is established and is fixed the outside of rotation axis, fixed pipe with be equipped with the water outlet chamber between the rotation axis, the left end of rotation axis is outstanding the left side of fixed pipe, the right-hand member of rotation axis is located in the fixed pipe, helical blade's inside is hollow, helical blade establishes on the lateral wall of fixed pipe, the fixed pipe is equipped with helical blade's position department is equipped with the outlet duct, the outlet duct along helical blade's spiral direction setting, the one end of outlet duct with rotation axis fixed connection and with the inner wall intercommunication of rotation axis, the other end of rotation axis with fixed pipe fixed connection just is located helical blade's inner chamber, the fixed pipe is equipped with helical blade's position department has still seted up the apopore, the left end of rotation axis is equipped with first swivel bearing, the right-hand member of fixed pipe is equipped with second swivel bearing, first swivel bearing with second swivel bearing and the inner race fixed connection of outer lane, the outer lane.

According to the invention, the steam generated by tiling and drying is conveyed into the rotating shaft through the air inlet pipe, then enters the inner cavity of the spiral blade through the air outlet pipe, so that the spiral blade is heated, the materials which fall into the material collecting box are scattered and conveyed to the crushing tank for secondary heating, the cooled steam is cooled into water and discharged into the water outlet cavity through the water outlet hole, and then is discharged through the water outlet pipe, so that the materials are dried again, the dryness of the materials is ensured, and the materials are convenient to scatter after entering the crushing tank.

Preferably, a rotary motor is arranged on the left side wall of the material collecting box, a driving gear is arranged on an output shaft of the rotary motor, and a driven gear meshed with the driving gear is arranged on the rotary shaft.

The invention drives the driven gear to rotate by the rotation of the rotating motor, thereby driving the rotating shaft to rotate.

Preferably, a discharge hole is formed in the bottom of the material collecting box, and the crushing tank is arranged on the discharge hole, so that materials enter the crushing tank through the discharge hole after being conveyed.

The crushing tank is internally provided with a stirring rod, which is the prior art, so that a repeated description is omitted.

Preferably, the conveying drying area comprises a grid conveyor belt arranged on the rack, heating plates are arranged in the grid conveyor belt, the conveyor belt is provided with more than three layers from top to bottom, and the grid conveyor belt is heated by the heating plates, so that materials paved on the conveyor belt can be heated and evaporated, and then are paved and dried, the conveyor belt is provided with more than three layers and can be heated simultaneously, and drying efficiency is improved.

The conveyer belt adopts the mode of net for the hot plate can be through the abundant contact heating of the space material of net, improves heating efficiency.

Preferably, the material spraying area comprises an L-shaped hard tube, a feeding hose, a driving motor, a rotating tube and a fixed bearing, wherein the fixed bearing is fixed at the inner bottom of the box body, the rotating tube is fixedly connected with the inner ring of the fixed bearing and is vertically arranged in the box body, the driving motor is arranged at the top of the rotating tube, the motor end of the driving motor is fixedly connected with the box body, the output end of the driving motor is fixedly connected with the rotating tube, each of the driving motor is provided with the L-shaped hard tube above the grid conveyor belt, the L-shaped hard tube comprises a transverse tube and a vertical tube, the vertical tube is arranged above the grid conveyor belt and is positioned at the starting end of the grid conveyor belt, each of the vertical tubes penetrates through the rotating tube and is fixedly connected with the rotating tube, the feeding hose is fixedly connected with one end of the transverse tube, far away from the vertical tube, and extends to the box body, and the driving motor can adopt a servo motor.

According to the invention, the material is conveyed to the L-shaped hard tube through the feeding hose, and the rotation angle is controlled through the rotation of the driving motor, so that the L-shaped hard tube is controlled to rotate, the material can rotate in a small range by taking the rotating tube as the circle center, and the material can be paved on the conveying belt through the forward conveying force of the conveying belt.

Preferably, the scattering area comprises two mutually parallel sliding rails, the two sliding rails are positioned on the left side and the right side of the tail end of the grid conveyor belt, the sliding rails are fixed on the frame, the sliding direction of the sliding rails is a vertical direction, a shearing blade is arranged between the two sliding rails and positioned at the tail end of the grid conveyor belt, the tail end of each grid conveyor belt is provided with the shearing blade, the two ends of each shearing blade are provided with fixing rods, and the fixing rods are fixed on the sliding rails.

According to the invention, the shearing blade moves up and down on the sliding rail, so that the materials conveyed to the tail end of each layer of conveyor belt are cut at one time, scattering is ensured, and meanwhile, the cutting efficiency is improved.

Preferably, the position of the collecting box, where the rotating motor is installed, is further provided with a blocking cover, and the rotating shaft penetrates through the blocking cover and is rotationally connected with the blocking cover through a bearing, so that the material is prevented from falling onto the motor through the blocking cover.

In summary, the invention has the following beneficial effects:

1. the process adopts the steps of tiling drying, stripping, secondary drying and crushing, improves the dispersity of the powdery ginseng extract and improves the physical properties;

2. according to the invention, the steam generated after the flat drying is conveyed to the conveying area of the drying equipment, so that the conveying area is heated, secondary drying is performed, the steam generated after the flat drying is fully used, the resource recycling is realized, the energy saving purpose is realized, the economic benefit is improved, and the whole process is more environment-friendly;

3. according to the invention, the materials are sprayed out through the spraying area and conveyed through the conveying drying area, so that the materials are tiled on the conveying belt for conveying and drying, then are primarily scattered through the scattering area, then are dried again through the secondary drying area, and then are scattered through the crushing tank, so that the dispersity of ginseng extracts is improved, and meanwhile, steam generated in the conveying drying area is conveyed to the secondary drying area for secondary use, so that the resource recycling is realized, the energy-saving purpose is realized, and the thermal efficiency is improved;

4. according to the invention, steam generated by tiling and drying is conveyed into the rotating shaft through the air inlet pipe, then enters the inner cavity of the spiral blade through the air outlet pipe, so that the spiral blade is heated, materials which fall into the material collecting box are scattered and conveyed to the crushing tank for secondary heating, the discharged steam is cooled into water and discharged into the water outlet cavity through the water outlet hole, and then the water is discharged through the water outlet pipe, so that the materials are dried again, the dryness of the materials is ensured, and the materials are convenient to scatter after entering the crushing tank;

5. according to the invention, the material is conveyed to the L-shaped hard tube through the feeding hose, and the rotation angle is controlled through the rotation of the driving motor, so that the L-shaped hard tube is controlled to rotate, the material can rotate in a small range by taking the rotating tube as the circle center, and the material can be paved on the conveying belt through the forward conveying force of the conveying belt;

6. according to the invention, the ginseng extract is extracted for at least six times by utilizing the organic solvent, and then the pesticide residue is adsorbed and refined and purified by the resin, so that the pesticide residue removal rate can reach more than 99.9%, the European standard and the American standard are reached, the operation is simple, the cost is low, and the control is easy.

Drawings

FIG. 1 is a schematic flow diagram of the process of the present invention;

FIG. 2 is a schematic cross-sectional view of the drying apparatus of the present invention;

FIG. 3 is a schematic view of the drying apparatus of the present invention with the cabinet removed;

FIG. 4 is an overall schematic of the drying apparatus of the present invention;

FIG. 5 is a schematic view of the secondary drying zone of the drying apparatus of the present invention;

FIG. 6 is an enlarged schematic view of the present invention at A of FIG. 5;

FIG. 7 is a schematic view of a connection section of a rotary shaft, a fixed tube, a helical blade, and an air outlet tube according to the present invention;

FIG. 8 is a schematic view of the rotary shaft, stationary tube and outlet tube of the present invention.

Description of the embodiments

The following specific examples are intended to be illustrative of the invention and are not intended to be limiting, as modifications of the invention will be apparent to those skilled in the art upon reading the specification without inventive contribution thereto, and are intended to be protected by the patent law within the scope of the appended claims.

The invention is described in detail below with reference to the accompanying drawings.

Examples

As shown in FIG. 1, the preparation method of the green and safe ginseng extract comprises the following steps:

s1, dissolving: adding 35mL of water and 65mL of 100% ethyl acetate into 100g of ginseng crude extract, stirring and heating to above 80 ℃, preserving heat for 20min, and continuously stirring at a stirring speed of 120r/min;

s2, extracting: slowly adding 1000mL of more than 97% ethyl acetate; stirring for 2h, standing for 2h, discharging the organic layer when the organic layer and the water layer are obviously layered, and continuously extracting for six times; adding 50mL of water to dissolve the bottom extract, stirring and uniformly mixing, and removing high pesticide residue components in the organic layer in a solvent recovery tower through distillation for recycling;

s3, primary concentration: removing residual organic solvent in the bottom extract with a concentrator, concentrating at vacuum degree of-0.08 mPa and concentration temperature below 60deg.C, adding water three times during concentration, each time adding 200L water, and taking relative density of 1.10g/ml as concentration end point;

s4, purifying: the concentrated solution passes through Rongkoss 4500CL specific macroporous resin with the flow rate of 3BV/h, and effluent liquid is collected;

s8, heating in a conveying area: conveying the steam generated after the step of tiling and drying S5 to a conveying area of drying equipment, so that the conveying area is heated;

s10, crushing, namely crushing the ginseng extract which is conveyed and dried in the step S9 through a crushing area of a drying device to obtain powdery ginseng extract.

As shown in fig. 2-4, the drying device comprises a box body 1, a cover 11 is covered on the top of the box body, a frame 2 is arranged in the box body 1, a spraying area 3, a conveying drying area 4, a scattering area 5 and a secondary drying area 6 are sequentially arranged on the frame 2 from left to right, an air outlet 10 is arranged on the top of the box body 1, an air inlet pipe 61 and an air outlet 62 are arranged on the secondary drying area 6, an air suction pump 7 is arranged between the air outlet 10 and the air inlet pipe 61, an air suction nozzle of the air suction pump 7 is connected with the air outlet 10, an air suction nozzle of the air suction pump 7 is connected with the air inlet pipe 61, a crushing tank 8 is further arranged at the bottom of the secondary drying area 6, the conveying drying area 4 comprises a grid conveyor belt 41 arranged on the frame, heating plates 42 are arranged in the grid conveyor belt 41, more than three conveyor belts 41 are arranged from top to bottom, the material spraying area 3 comprises an L-shaped hard tube 31, a feeding hose 32, a driving motor 33, a rotating tube 34 and a fixed bearing 35, wherein the fixed bearing 35 is fixed at the inner bottom of the box body 1, the rotating tube 34 is fixedly connected with the inner ring of the fixed bearing 35 and is vertically arranged in the box body 1, the driving motor 33 is arranged at the top of the rotating tube 34, the motor end of the driving motor 33 is fixedly connected with the box body 1, the output end of the driving motor 33 is fixedly connected with the rotating tube 34, the upper part of each grid conveyor belt 41 is provided with an L-shaped hard tube 31, the L-shaped hard tube 31 comprises a transverse tube 311 and a vertical tube 312, the vertical tube 312 is arranged above the grid conveyor belt 41 and is positioned at the starting end of the grid conveyor belt 41, the upper part of each grid conveyor belt 41 is provided with an L-shaped hard tube 31, the standpipe 312 runs through the rotary pipe 34 and is fixedly connected with the rotary pipe 34, the feeding hose 32 and one end of the transverse pipe 311, which is far away from the standpipe 312, are fixedly connected and extend out of the box 1, the scattering area 5 comprises two mutually parallel sliding rails 51, two sliding rails 51 are positioned at the left side and the right side of the tail end of the grid conveyor belt 41, the sliding rails 51 are fixed on the frame 2, the sliding direction of the sliding rails 51 is in a vertical direction, a shearing blade 52 is arranged between the two sliding rails 51, the shearing blade 52 is positioned at the tail end of the grid conveyor belt 41, the shearing blade 52 is arranged at the tail end of each grid conveyor belt 41, two ends of the shearing blade 52 are provided with fixing rods 53, and the fixing rods 53 are fixed on the sliding rails 51.

As shown in fig. 5-8, the secondary drying area 6 comprises a collecting box 63 with an open top, a rotating shaft 64 with a hollow interior, a fixed pipe 65, an air outlet pipe 66 and a helical blade 67, wherein the rotating shaft 64 is arranged in the inner cavity of the collecting box 63, the fixed pipe 65 is sleeved and fixed on the outer side of the rotating shaft 64, an air outlet cavity 69 is arranged between the fixed pipe 65 and the rotating shaft 64, the left end of the rotating shaft 64 protrudes out of the left side of the fixed pipe 65, the right end of the rotating shaft 64 is positioned in the fixed pipe 65, the helical blade 67 is hollow, the helical blade 67 is arranged on the outer side wall of the fixed pipe 65, the air outlet pipe 66 is arranged at the position of the fixed pipe 67, one end of the air outlet pipe 66 is fixedly connected with the rotating shaft 64 and is mutually communicated with the inner wall of the rotating shaft 64, the other end of the rotating shaft 64 is fixedly connected with the fixed pipe 65 and is positioned in the inner cavity of the spiral blade 67, a water outlet hole 60 is further formed in the position, where the spiral blade 67 is arranged, of the fixed pipe 65, a first rotating bearing 641 is arranged at the left end of the rotating shaft 64, a second rotating bearing 651 is arranged at the right end of the fixed pipe 65, the first rotating bearing 641 and the second rotating bearing 651 are both fixed on the material collecting box 63, the rotating shaft 64 is fixedly connected with the inner ring of the first rotating bearing 641, the air inlet pipe 61 is fixedly connected with the outer ring of the first rotating bearing 641, the fixed pipe 65 is fixedly connected with the inner ring of the second rotating bearing 651, the water outlet pipe 62 is fixedly connected with the outer ring of the second rotating bearing 651, a rotating motor 68 is arranged on the left side wall of the material collecting box 63, a driving gear 681 is arranged on the output shaft of the rotating motor 68, the rotary shaft 64 is provided with a driven gear 682 which is meshed with the driving gear, the bottom of the material collecting box 63 is provided with a discharge hole 631, the crushing tank 8 is arranged on the discharge hole 631, the position of the material collecting box 63 where the rotary motor 68 is arranged is also provided with a baffle cover 632, and the rotary shaft 64 penetrates through the baffle cover 632 and is in rotary connection with the baffle cover 632 through a bearing.

Working principle: as shown in fig. 1-8, the concentrated effluent is conveyed to the L-shaped hard tube 33 through the feeding hose 32, the rotation of the driving motor 33 is performed, the rotation angle is controlled, and thus the L-shaped hard tube 33 is controlled to rotate, so that the material can rotate with a small amplitude by taking the rotating tube 34 as the center of a circle, the material is flatly laid on the grid conveyor 41 through the forward conveying force of the grid conveyor 41, then the material is heated and dried through the heating of the heating plate 42, the ginseng extract in the shape of chips is formed, then the ginseng extract is conveyed to the tail end of the grid conveyor 41, the shearing blades 52 move downwards through the sliding rails (in an initial state, each shearing blade 52 is arranged above the grid conveyor 4), the ginseng extract in the shape of chips is changed into blocks and then falls into the aggregate box, steam generated in the conveying drying zone 4 is conveyed into the rotating shaft 64 through the air inlet pipe 61, then enters the inner cavity of the spiral blade 67 through the air outlet pipe 66, so as to heat the spiral blade 67, the rotating motor 68 rotates, the heated spiral blade 67 carries the material to be dried while conveying, the material is conveyed to the discharge port, then enters the crushing tank to crush ginseng extract, the ginseng extract in the crushing tank, the water is crushed, the water is cooled, the water is discharged through the water outlet pipe is cooled, the water outlet is cooled, the energy is discharged through the water outlet is cooled, and the energy-saving is realized, and the energy is improved, and the energy is discharged through the water-saving.

Examples

s1, dissolving: adding 35mL of water and 65mL of 100% ethyl acetate into 100g of ginseng crude extract, stirring and heating to above 75 ℃, preserving heat for 20min, and continuously stirring at a stirring speed of 120r/min;

Examples

s1, dissolving: adding 35mL of water and 65mL of 100% ethyl acetate into 100g of ginseng crude extract, stirring and heating to above 85 ℃, preserving heat for 20min, and continuously stirring at a stirring speed of 120r/min;

s3, concentrating: removing residual organic solvent in the bottom extract with a concentrator, concentrating at vacuum degree of-0.08 mPa and concentration temperature below 60deg.C, adding water three times during concentration, each time adding 200L water, and taking relative density of 1.10g/ml as concentration end point;

s5, concentrating and drying: concentrating the effluent according to the method of the step S3, drying in an oven, collecting dry powder after drying is finished, and weighing.

From the above results, it was found that the dryness and dispersity were best by using the preparation method of ginseng extract of example 1 of the present invention.

Claims

1. A green and safe preparation method of ginseng extract is characterized by comprising the following steps:

s2, extraction: slowly adding an organic solvent, continuously stirring for 1.5-2.5 h, then standing for 1.5-2.5 h, discharging the organic layer when obvious layering occurs between the organic layer and the water layer, and continuously extracting; dissolving the bottom extract with water, and recycling the organic layer;

2. The method for preparing the ginseng extract, which is green and safe, according to claim 1, is characterized in that the drying equipment comprises a box body (1), a cover body (11) is covered on the top of the box body, a frame (2) is arranged in the box body (1), a spraying area (3), a conveying drying area (4), a scattering area (5) and a secondary drying area (6) are sequentially arranged on the frame (2) from left to right, an air outlet (10) is arranged on the top of the box body (1), an air inlet pipe (61) and an air outlet pipe (62) are arranged on the secondary drying area (6), an air pump (7) is arranged between the air outlet (10) and the air inlet pipe (61), an air suction nozzle of the air pump (7) is connected with the air outlet (10), an air discharge nozzle of the air pump (7) is connected with the air inlet pipe (61), and a crushing tank (8) is further arranged on the bottom of the secondary drying area (6).

3. The method according to claim 1, wherein the secondary drying area (6) comprises a collecting box (63) with an open top, a rotating shaft (64) with a hollow inside, a fixed pipe (65), an air outlet pipe (66) and a spiral blade (67), the rotating shaft (64) is arranged in an inner cavity of the collecting box (63), the fixed pipe (65) is sleeved and fixed on the outer side of the rotating shaft (64), an air outlet cavity (69) is arranged between the fixed pipe (65) and the rotating shaft (64), the left end of the rotating shaft (64) protrudes out of the left side of the fixed pipe (65), the right end of the rotating shaft (64) is positioned in the fixed pipe (65), the inside of the spiral blade (67) is hollow, the spiral blade (67) is arranged on the outer side wall of the fixed pipe (65), the position of the fixed pipe (65) with the spiral blade (67) is provided with the air outlet pipe (66), one end of the air outlet pipe (66) is fixedly connected with the rotating shaft (64) and is fixedly connected with the inner wall (64) of the rotating shaft (64) and is fixedly connected with the other end of the rotating shaft (64), the position of the fixed pipe (65) provided with the helical blade (67) is also provided with a water outlet hole (60).

4. A method for preparing a green and safe ginseng extract according to claim 3, wherein a first rotary bearing (641) is provided at the left end of the rotary shaft (64), a second rotary bearing (651) is provided at the right end of the stationary tube (65), the first rotary bearing (641) and the second rotary bearing (651) are both fixed on the collecting box (63), the rotary shaft (64) is fixedly connected with the inner ring of the first rotary bearing (641), the air inlet tube (61) is fixedly connected with the outer ring of the first rotary bearing (641), the stationary tube (65) is fixedly connected with the inner ring of the second rotary bearing (651), and the water outlet tube (62) is fixedly connected with the outer ring of the second rotary bearing (651).

5. The method for preparing a green and safe ginseng extract according to claim 4, wherein a rotary motor (68) is provided on the left side wall of the collecting box (63), a driving gear (681) is provided on an output shaft of the rotary motor (68), and a driven gear (682) engaged with the driving gear is provided on the rotary shaft (64).

6. The method for preparing a green and safe ginseng extract according to claim 4, wherein a discharge port (631) is provided at the bottom of the collecting box (63), and the pulverizing tank (8) is provided on the discharge port (631).

7. The method for preparing a green and safe ginseng extract according to claim 4, wherein the conveying and drying area (4) comprises a grid conveyor belt (41) arranged on a frame, heating plates (42) are arranged in the grid conveyor belt (41), and more than three conveyor belts (41) are arranged from top to bottom.

8. The method according to claim 7, wherein the spraying area (3) comprises an L-shaped hard tube (31), a feeding hose (32), a driving motor (33), a rotating tube (34) and a fixed bearing (35), the fixed bearing (35) is fixed at the inner bottom of the box (1), the rotating tube (34) is fixedly connected with the inner ring of the fixed bearing (35) and vertically arranged in the box (1), the driving motor (33) is arranged at the top of the rotating tube (34), the motor end of the driving motor (33) is fixedly connected with the box (1), the output end of the driving motor (33) is fixedly connected with the rotating tube (34), an L-shaped hard tube grid (31) is arranged above each grid conveyor belt (41), the L-shaped hard tube (31) comprises a transverse tube (311) and a vertical tube (312), the vertical tube (312) is arranged above the conveyor belt (41) and is arranged at the initial grid end (41) of the conveyor belt (41) and is connected with the vertical tube (34), the feeding hose (32) is fixedly connected with one end, far away from the vertical pipe (312), of the transverse pipe (311) and extends out of the box body (1).

9. The method for preparing the ginseng extract according to claim 7, wherein the scattering area (5) comprises two parallel sliding rails (51), the two sliding rails (51) are positioned at the left and right sides of the tail end of the grid conveyor belt (41), the sliding rails (51) are fixed on the frame (2) and the sliding direction of the sliding rails (51) is a vertical direction, a shearing blade (52) is arranged between the two sliding rails (51), the shearing blade (52) is positioned at the tail end of the grid conveyor belt (41), the shearing blade (52) is arranged at the tail end of each grid conveyor belt (41), and fixing rods (53) are arranged at the two ends of the shearing blade (52) and are fixed on the sliding rails (51).

10. The method for preparing a green and safe ginseng extract according to claim 7, wherein a blocking cover (632) is further provided at a position where the collecting box (63) is provided with a rotating motor (68), and the rotating shaft (64) penetrates through the blocking cover (632) and is rotatably connected with the blocking cover (632) through a bearing.