Selenium-rich mushroom powder extraction equipment and preparation method thereof

Abstract

The invention relates to the technical field of mushroom powder extraction equipment, in particular to selenium-enriched mushroom powder extraction equipment and a preparation method thereof. The selenium-enriched mushroom powder extraction equipment comprises a drying machine body, the drying machine body comprises a machine box, a drying bin is arranged at the bottom end in the machine box, a slow heating cavity and a temperature rising cavity are formed in the top end in the machine box, the slow heating cavity is located above the temperature rising cavity, and preheating gas enters the slow heating cavity; the interior of the heating cavity is used for allowing heating gas to enter; and a preheating mechanism is arranged in the case and located at the top end of the drying bin. Through the preheating mechanism, low-temperature pre-drying and gradual heating processes, the selenium loss is reduced, meanwhile, the original form and structure of mushroom powder are kept, excessive shrinkage or deformation is avoided, segmented control over the temperature in the drying chamber is achieved through the hot induced draft fan, the slow heating cavity and the heating cavity, and the drying efficiency is improved. And the temperature stability of the mushroom powder in the pre-drying and final drying processes is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of mushroom powder extraction equipment, in particular to a selenium-rich mushroom powder extraction equipment and a preparation method thereof. Background Art

[0002] In the existing mushroom powder production and extraction process, the extraction equipment (spray dryer) used is a commonly used drying equipment. It forms dry mushroom powder by atomizing the mushroom powder solution into small particles and then quickly drying them with hot air. Spray dryers have the advantages of fast drying speed, high efficiency and easy operation, so they are widely used in mushroom powder production.

[0003] The structural deficiencies of the spray dryer for mushroom powder in the prior art: The current mushroom powder spray dryers all use a relatively fast drying method to remove moisture from the mushroom powder mother liquor to form a dry powder. This drying method is achieved through high temperature. Although it can achieve rapid drying, the faster drying rate and high temperature will also cause a large amount of selenium content in the mushroom powder to be lost. Secondly, although pre-drying can solve this problem, it is necessary to try to maintain the original shape and structure of the mushroom powder to avoid excessive shrinkage or deformation, which is very important for maintaining the quality of the final product.

[0004] In view of this, a selenium-rich mushroom powder extraction device that can perform pre-drying in stages and reduce the agglomeration phenomenon is needed to improve the shortcomings of the existing technology. Summary of the invention

[0005] The purpose of the present invention is to provide a selenium-enriched mushroom powder extraction device and a preparation method thereof, which adopts a gradually heated pre-drying process to achieve the selenium content of the mushroom powder and reduce the problem of agglomeration of the mushroom powder mother liquor during the pre-drying process.

[0006] To achieve the above-mentioned object, one of the objects of the present invention is to provide a selenium-rich mushroom powder extraction device, including a drying body, the drying body including a chassis, the bottom end of the chassis is provided with a drying chamber, the top end of the chassis is provided with a slow heating chamber and a heating chamber, the slow heating chamber is located above the heating chamber, the interior of the slow heating chamber is used for entering the preheating gas, and the interior of the heating chamber is used for entering the heating gas; A preheating mechanism is provided at the top of the drying chamber inside the chassis, and the preheating mechanism includes a guide chamber and a guide group. The guide group is located inside the guide chamber, and the top of the guide chamber extends through the inside of the chassis to the upper surface of the chassis. The middle part of the guide chamber is mostly located in the slow heating chamber and less located in the heating chamber, so as to increase the preheating time in the slow heating chamber. The guide bin is provided with spiral blades, the guide group includes a preheating part, a spiral guide plate is provided inside the preheating part, the preheating part is tightly fitted with the inner wall of the guide bin, the lower surface of the spiral guide plate is tightly fitted with the upper surface of the spiral blades, the surface of the preheating part is spirally provided with notches, the notches are adapted to the preheating part, and the preheating part and the spiral guide plate are spirally rotated up and down inside the guide bin.

[0007] As a further improvement of the technical solution, a conical discharge port for liquid discharge is provided at the bottom end of the spiral blade, and an inverted trapezoidal block is connected to the bottom end of the spiral guide plate, and the inclined surface of the inverted trapezoidal block is adapted to the top part of the conical discharge port.

[0008] As a further improvement of the present technical solution, the preheating mechanism also includes a driving group, which includes a mounting block, the mounting block is fixed on the upper surface of the guide bin, the bottom end of the mounting block is rotatably connected to a rotating round block, a telescopic rod is provided at one end of the rotating round block, and the inner sliding rod of the telescopic rod is fixedly connected to the top of the spiral guide plate.

[0009] As a further improvement of the technical solution, a hot air blower for inputting hot air is installed on the outer surface of the chassis, and the hot air blower includes a heating pipe, a preheating pipe and a temperature control valve. The heating pipe and the preheating pipe are used to circulate hot air, and the temperature control valve is used to control the preheating pipe to circulate hot air; The preheating pipeline transports the preheating gas to the slow heating chamber; The heating pipeline transports the heated gas into the heated chamber.

[0010] As a further improvement of the technical solution, a heat transfer port is provided between the temperature rising chamber and the drying chamber, and the temperature rising chamber transfers the hot air to the drying chamber through the heat transfer port.

[0011] As a further improvement of the technical solution, a liquid delivery pump is installed on the top of the chassis, a mother liquid inlet is opened on the top of the diversion bin, and a liquid delivery tube of the liquid delivery pump is fixedly connected to the inside of the mother liquid inlet.

[0012] As a further improvement of the technical solution, the bottom discharge port of the drying bin is connected to a cyclone separator through a pipeline, the top of the cyclone separator is connected to a fan through a pipeline, and the fan is installed on the upper surface of the chassis.

[0013] As a further improvement of the technical solution, a spray head is provided at the liquid outlet at the bottom of the guide bin, and the spray head is located inside the drying bin.

[0014] The second object of the present invention is to provide a method for preparing selenium-rich mushroom powder, using any of the selenium-rich mushroom powder extraction equipment described above, comprising the following steps: S1. Wash, cut or slice the mushrooms for extraction; S2, subjecting the pretreated mushrooms to one of ultrasonic extraction, microwave-assisted extraction and heating reflux extraction, and then dissolving the active ingredients in the mushrooms into a solvent; S3, after extraction, the solution is passed through a filtering device to remove solid residues and obtain a filtrate containing the target component; S4, passing the filtrate through a vacuum concentrator to reduce the volume of the solvent and concentrate the target component; S5. The concentrated solution is passed through a selenium-rich mushroom powder extraction device to remove the remaining solvent and obtain dry mushroom powder.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. In the selenium-rich mushroom powder extraction equipment and preparation method thereof, a preheating mechanism is set up to perform low-temperature pre-drying, and then a gradually heated process is performed to reduce the loss of selenium, while maintaining the original form and structure of the mushroom powder to avoid excessive shrinkage or deformation. The temperature in the drying chamber is controlled in sections by using a hot induced draft fan, a slow heating chamber, and a heating chamber to ensure the temperature stability of the mushroom powder during the pre-drying and final drying processes.

[0016] 2. In the selenium-rich mushroom powder extraction equipment and preparation method thereof, a preheating mechanism is set up. Through the design of the guide bin and the spiral guide plate, the mushroom powder mother liquor is gradually heated up during the transportation process to achieve pre-drying, and is atomized into the drying bin through the spray head, thereby increasing the contact area between the droplets and the hot air, shortening the drying time, and improving the drying efficiency. At the same time, when the guide group reciprocates up and down, a stirring effect can be applied to the mushroom powder mother liquor at the bottom of the guide bin to reduce the agglomeration of the mushroom powder mother liquor. At the same time, when the spiral guide plate rises, a slight stirring effect will also be applied to the mushroom powder mother liquor circulating in the spiral guide plate, so that the mushroom powder mother liquor is always in a flowing non-static state, avoiding the occurrence of agglomeration, and ensuring that the dried mushroom powder has a better particle size distribution. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of Example 1; Figure 2 This is a schematic diagram of the internal structure of the drying body of Example 1; Figure 3 This is a schematic diagram of the cross-sectional structure of the top of the chassis of Example 1; Figure 4 This is a schematic diagram of the cross-sectional structure of the heat exhaust fan and the top of the chassis in Example 1; Figure 5 This is a schematic diagram of the preheating mechanism structure of Example 1; Figure 6 This is a schematic diagram of the structure of the diversion chamber of Example 1; Figure 7This is a schematic diagram of the internal structure of the diversion bin of Example 1; Figure 8 This is a schematic diagram of the structure of the diversion group of Example 1; Fig. 9 This is a schematic diagram of the drive group structure of Example 1.

[0018] The meaning of each number in the figure is: 10. Drying body; 11. Chassis; 12. Drying chamber; 13. Slow heating chamber; 14. Heating chamber; 141. Heat transfer port; 20. Preheating mechanism; 21. diversion chamber; 211. spiral blade; 212. conical discharge port; 213. mother liquor inlet; 22. guide group; 221. preheating element; 222. spiral guide plate; 223. inverted trapezoidal block; 23. driving group; 231. mounting block; 232. telescopic rod; 233. rotating round block; 234. servo motor; 24. spray head; 30. Hot exhaust fan; 31. Heating pipe; 32. Preheating pipe; 33. Temperature control valve; 40. Mother liquor barrel; 50. Cyclone separator; 60. Liquid delivery pump. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figure 1 and Figure 2 As shown, one of the purposes of this embodiment is to provide a selenium-rich mushroom powder extraction device, including a drying body 10, the drying body 10 includes a chassis 11, and a drying bin 12 is provided at the bottom end of the chassis 11. The drying bin 12 is used to quickly dry the mushroom powder mother liquor entering the interior thereof to form a powder. The discharge port at the bottom of the drying bin 12 is connected to a cyclone separator 50 through a pipeline, and the top of the cyclone separator 50 is connected to a fan through a pipeline. The fan is installed on the upper surface of the chassis 11. When the fan is working, the interior of the drying bin 12 is sucked, and the dried powder is drawn from the interior of the drying bin 12 into the cyclone separator 50, and is separated by the cyclone separator 50, the powder is collected, and the hot air is discharged from the fan outlet.

[0021] In order to increase the selenium content of the mushroom powder after preparation, this embodiment uses low-temperature pre-drying and then gradually raises the temperature to reduce the loss of selenium. At the same time, in the pre-drying stage, the original shape and structure of the mushroom powder are maintained to avoid excessive shrinkage or deformation. Figure 3 As shown, a preheating mechanism 20 is provided at the top of the drying chamber 12 inside the chassis 11, and the bottom end of the preheating mechanism 20 extends through the chassis 11 to the inside of the drying chamber 12, and is used to atomize the preheated mushroom powder mother liquid into the drying chamber 12 for final drying. Secondly, a hot air blower 30 for inputting hot air is also installed on the outer surface of the chassis 11, and the hot air blower 30 can also transport preheated gas, and stops transporting after the preheating temperature reaches the set value.

[0022] Specifically: the top of the chassis 11 is provided with a slow heating chamber 13 and a heating chamber 14, the slow heating chamber 13 is located above the heating chamber 14, the interior of the slow heating chamber 13 is used for entering the preheating gas, and the interior of the heating chamber 14 is used for entering the heating gas, see Figure 4 As shown, the hot exhaust fan 30 includes a heating pipe 31, a preheating pipe 32 and a temperature control valve 33. The heating pipe 31 and the preheating pipe 32 are used to circulate hot air. The temperature control valve 33 is used to control the preheating pipe 32 to circulate hot air. The preheating pipe 32 transports the preheated gas to the slow heating chamber 13. The top of the slow heating chamber 13 penetrates the chassis 11 and is provided with an exhaust port (not shown in the figure) for discharging the gas inside the slow heating chamber 13. The heating pipe 31 transports the heated gas to the heating chamber 14, and transports the hot gas to the drying chamber 12 through the heat transfer port 141 provided between the heating chamber 14 and the drying chamber 12. The top of the preheating mechanism 20 is located in the slow heating chamber 13, and the bottom is located in the heating chamber 14. The purpose is that when the mother liquor passes through the preheating mechanism 20, it is first preheated at a low temperature from top to bottom and then heated.

[0023] A liquid feed pump 60 is installed at the top of the chassis 11. The liquid feed pump 60 is used to extract mushroom powder mother liquid from the mother liquid barrel 40 through a liquid infusion tube and deliver it to the preheating mechanism 20 for preheating.

[0024] Based on the above, the workflow is: First, the hot air is transported from the preheating pipe 32 and the heating pipe 31 to the slow heating chamber 13 and the heating chamber 14 through the hot induced draft fan 30. When the internal temperature of the slow heating chamber 13 reaches the set temperature, the temperature control valve 33 stops working to divert the gas from the heating pipe 31 to the preheating pipe 32. Then the liquid delivery pump 60 is started to transport the mushroom powder mother liquor from the mother liquor barrel 40 to the preheating mechanism 20. The preheating mechanism 20 is used to pre-dry the mushroom powder mother liquor to remove part of the moisture and improve the stability of selenium. Finally, the pre-dried mother liquor enters the drying chamber 12 for final drying. The mushroom powder produced after drying is separated by the fan and enters the cyclone separator 50. The hot air is discharged from the fan outlet.

[0025] Furthermore, in order to achieve a temperature rise process when the mushroom powder mother liquid enters the preheating mechanism 20 and prevent the mushroom powder mother liquid from agglomerating, the present embodiment further discloses a specific structure of the preheating mechanism 20, which is as follows: See also Figure 5 and Figure 6 As shown, in this embodiment, the preheating mechanism 20 includes a guide chamber 21, a guide group 22 and a drive group 23. The guide group 22 is located inside the guide chamber 21. The top of the guide chamber 21 passes through the inside of the chassis 11 and extends to the upper surface of the chassis 11. The drive group 23 is arranged on the upper surface of the guide chamber 21. Figure 4 It can be seen that the middle part of the guide bin 21 is mostly located in the slow heating chamber 13 and less located in the heating chamber 14, in order to increase the preheating time in the slow heating chamber 13 so that the temperature does not increase too quickly. The bottom end of the guide bin 21 is conical in shape, in order to discharge the mother liquor in a concentrated manner.

[0026] A spray head 24 is provided at the bottom liquid outlet of the guide bin 21. The spray head 24 is located inside the drying bin 12 and is used to discharge the mother liquid into the drying bin 12 by atomization, thereby increasing the contact area between the mist droplets and the hot air, shortening the drying time, and quickly drying into powder.

[0027] Furthermore, the working principle between the guide chamber 21, the guide group 22 and the driving group 23 is disclosed below.

[0028] See also Figure 7 As shown, the guide chamber 21 is provided with a spiral blade 211 inside, and a conical discharge port 212 for discharging liquid is provided at the bottom of the spiral blade 211. A mother liquid inlet 213 is provided at the top of the guide chamber 21. A liquid inlet 213 is fixedly connected to the mother liquid delivery pump 60 for entering the mother liquid. Figure 8 As shown, the guide group 22 includes a preheating member 221, and a spiral guide plate 222 is provided inside the preheating member 221. The preheating member 221 is tightly fitted with the inner wall of the guide bin 21, and the lower surface of the spiral guide plate 222 is tightly fitted with the upper surface of the spiral blade 211. The surface of the preheating member 221 is spirally provided with a slot, and the slot is adapted to the preheating member 221. The purpose of this design is that the preheating member 221 and the spiral guide plate 222 can be spirally rotated up and down inside the guide bin 21, which is used to slowly convey the mother liquor, increase the path for conveying the liquid, increase the preheating time, and allow the pre-drying of the mushroom powder mother liquor to be formed by gradually increasing the temperature, thereby further reducing the loss of selenium.

[0029] Also, see Figure 8As shown, the bottom end of the spiral guide plate 222 is connected to an inverted trapezoidal block 223, and the inclined surface of the inverted trapezoidal block 223 is adapted to the top part of the conical discharge port 212, so that when the spiral guide plate 222 drives the inverted trapezoidal block 223 to move downward, it can be embedded in the conical discharge port 212, and have an extrusion and conveying effect on the mushroom powder mother liquor. In this embodiment, the work of the guide group 22 is carried out in an up and down cycle. When the spiral guide plate 222 drives the inverted trapezoidal block 223 to rise, it can exert a stirring effect on the mushroom powder mother liquor at the bottom of the guide bin 21 to reduce the agglomeration of the mushroom powder mother liquor. At the same time, when the spiral guide plate 222 rises, it will also have a slight stirring effect on the mushroom powder mother liquor circulating in the spiral guide plate 222, so that the mushroom powder mother liquor is always in a flowing non-static state to avoid the occurrence of agglomeration.

[0030] In order to realize the up and down reciprocating motion of the guide group 22, in this embodiment, please refer to Fig. 9 As shown, the driving group 23 includes a mounting block 231, which is fixed to the upper surface of the guide chamber 21. The bottom end of the mounting block 231 is rotatably connected to a rotating round block 233. A telescopic rod 232 is provided at one end of the rotating round block 233. The telescopic rod 232 adopts a telescopic structure of two sliding rods. The inner sliding rod slides inside the outer sliding rod, and a spring fixedly connected to the inner sliding rod is provided inside the outer sliding rod. It is not shown in the figure, which is a prior art. The inner sliding rod of the telescopic rod 232 is fixedly connected to the top of the spiral guide plate 222, and the mounting block A rotating groove is provided inside 231, and the telescopic rod 232 slides in the rotating groove. When the telescopic rod 232 moves along the rotating groove, the spiral guide plate 222 is driven to rotate through the inner sliding rod, so that the guide group 22 as a whole can reciprocate up and down in the guide bin 21; further, a servo motor 234 is installed on the top surface of the mounting block 231, and the driving shaft of the servo motor 234 passes through the mounting block 231 and is connected to the rotating circular block 233, which is used to drive the rotating circular block 233 to rotate back and forth, thereby realizing the movement of the telescopic rod 232.

[0031] In summary, the overall working principle of the selenium-rich mushroom powder extraction equipment in this embodiment is as follows: First, the hot air is transported to the slow heating chamber 13 and the heating chamber 14 through the preheating pipe 32 and the heating pipe 31 through the hot induced draft fan 30. When the temperature inside the slow heating chamber 13 reaches the set temperature, the temperature control valve 33 stops the heating pipe 31 from diverting the gas to the preheating pipe 32. Then, the liquid delivery pump 60 is started to deliver the mushroom powder mother liquid from the mother liquid barrel 40 to the diversion bin 21. The servo motor 234 is started to drive the telescopic rod 232 to move, thereby driving The spiral guide plate 222 moves, and the movement of the spiral guide plate 222 drives the mushroom powder mother liquor to be transported downward. During the transportation process, the mushroom powder mother liquor gradually heats up to achieve pre-drying. When it is transported to the lowest end of the guide bin 21, part of the mushroom powder mother liquor is squeezed by the inverted trapezoidal block 223, and then atomized into the drying bin 12 by the spray head 24. The mushroom powder droplets enter the drying bin 12 for final drying. The mushroom powder produced after drying is separated by the fan into the cyclone separator 50, and the hot air is discharged from the fan outlet.

[0032] The second purpose of this embodiment is to provide a method for preparing selenium-rich mushroom powder, using the above-mentioned selenium-rich mushroom powder extraction equipment, including the following method steps: S1. Wash, cut or slice the mushrooms for extraction; S2, subjecting the pretreated mushrooms to one of ultrasonic extraction, microwave-assisted extraction and heating reflux extraction, and then dissolving the active ingredients in the mushrooms into a solvent; S3, after extraction, the solution is passed through a filtering device to remove solid residues and obtain a filtrate containing the target component; S4, passing the filtrate through a vacuum concentrator to reduce the volume of the solvent and concentrate the target component; S5. The concentrated solution is passed through a selenium-rich mushroom powder extraction device to remove the remaining solvent and obtain dry mushroom powder.

[0033] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A selenium-rich mushroom powder extraction device, comprising a drying body (10), wherein the drying body (10) comprises a chassis (11), wherein a drying chamber (12) is provided at the bottom of the chassis (11), wherein: A slow-heating chamber (13) and a heating chamber (14) are provided at the top of the interior of the chassis (11); the slow-heating chamber (13) is located above the heating chamber (14); the interior of the slow-heating chamber (13) is used for the entry of preheating gas, and the interior of the heating chamber (14) is used for the entry of heating gas; A preheating mechanism (20) is provided at the top of the drying chamber (12) inside the chassis (11), the preheating mechanism (20) comprising a flow guide chamber (21) and a flow guide group (22), the flow guide group (22) being located inside the flow guide chamber (21), the top of the flow guide chamber (21) passing through the inside of the chassis (11) and extending to the upper surface of the chassis (11), the middle portion of the flow guide chamber (21) being mostly located at the slow heating chamber (13) and less located at the heating chamber (14), so as to increase the preheating time in the slow heating chamber (13); The guide bin (21) is provided with a spiral blade (211) inside, the guide group (22) comprises a preheating element (221), a spiral guide plate (222) is provided inside the preheating element (221), the preheating element (221) is tightly fitted with an inner wall of the guide bin (21), the lower surface of the spiral guide plate (222) is tightly fitted with an upper surface of the spiral blade (211), a notch is spirally provided on the surface of the preheating element (221), the notch is matched with the preheating element (221), and the preheating element (221) and the spiral guide plate (222) perform a spiral rotation up and down inside the guide bin (21).

2. The selenium-rich mushroom powder extraction equipment according to claim 1, characterized in that: The bottom end of the spiral blade (211) is provided with a conical discharge port (212) for discharging liquid, and the bottom end of the spiral guide plate (222) is connected to an inverted trapezoidal block (223), wherein the inclined surface of the inverted trapezoidal block (223) is adapted to the top end of the conical discharge port (212).

3. The selenium-rich mushroom powder extraction equipment according to claim 1, characterized in that: The preheating mechanism (20) further comprises a driving group (23), wherein the driving group (23) comprises a mounting block (231), wherein the mounting block (231) is fixed to the upper surface of the guide chamber (21), wherein the bottom end of the mounting block (231) is rotatably connected to a rotating circular block (233), wherein a telescopic rod (232) is provided at one end of the rotating circular block (233), and an inner sliding rod of the telescopic rod (232) is fixedly connected to the top end of the spiral guide plate (222).

4. The selenium-rich mushroom powder extraction equipment according to claim 1, characterized in that: A heat induced draft fan (30) for inputting hot air is installed on the outer surface of the chassis (11), the heat induced draft fan (30) comprising a heating pipe (31), a preheating pipe (32) and a temperature control valve (33), the heating pipe (31) and the preheating pipe (32) being used to circulate hot air, and the temperature control valve (33) being used to control the preheating pipe (32) to circulate hot air; The preheating pipe (32) transports the preheating gas to the slow heating chamber (13); The heating pipe (31) transports the heated gas to the heating chamber (14).

5. The selenium-rich mushroom powder extraction equipment according to claim 4, characterized in that: A heat transfer port (141) is provided between the temperature increasing chamber (14) and the drying chamber (12), and the temperature increasing chamber (14) transfers hot air to the drying chamber (12) through the heat transfer port (141).

6. The selenium-rich mushroom powder extraction equipment according to claim 1, characterized in that: A liquid delivery pump (60) is installed at the top of the chassis (11), a mother liquid inlet (213) is opened at the top of the diversion bin (21), and a liquid delivery tube of the liquid delivery pump (60) is fixedly connected inside the mother liquid inlet (213).

7. The selenium-rich mushroom powder extraction equipment according to claim 1, characterized in that: The bottom discharge port of the drying bin (12) is connected to a cyclone separator (50) via a pipeline, and the top of the cyclone separator (50) is connected to a fan via a pipeline, and the fan is installed on the upper surface of the chassis (11).

8. The selenium-rich mushroom powder extraction equipment according to claim 1, characterized in that: A spray head (24) is provided at the liquid outlet at the bottom end of the guide bin (21), and the spray head (24) is located inside the drying bin (12).

9. A method for preparing selenium-enriched mushroom powder, characterized in that: The selenium-rich mushroom powder extraction device according to any one of claims 1 to 8 comprises the following steps: S1. Wash, cut or slice the mushrooms for extraction; S2, subjecting the pretreated mushrooms to one of ultrasonic extraction, microwave-assisted extraction and heating reflux extraction, and then dissolving the active ingredients in the mushrooms into a solvent; S3, after extraction, the solution is passed through a filtering device to remove solid residues and obtain a filtrate containing the target component; S4, passing the filtrate through a vacuum concentrator to reduce the volume of the solvent and concentrate the target component; S5. The concentrated solution is passed through a selenium-rich mushroom powder extraction device to remove the remaining solvent and obtain dry mushroom powder.

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