A millet shell steaming machine

Abstract

This utility model discloses a millet husk steaming machine, belonging to the technical field of brewing equipment. The millet husk steaming machine includes a cylindrical tower body. A feed inlet valve is installed at the feed port at the top of the tower body. Multiple steaming layers are provided in the upper part of the inner cavity of the tower body. Each steaming layer has a steam equalization chamber at its bottom, and each steam equalization chamber has a modular sieve plate assembly at its top. Each sieve plate assembly is composed of multiple independent sieve plate modules. Below the last steam equalization chamber, a dehumidification layer and a cooling layer are arranged sequentially. A hot air equalization chamber is located at the bottom of the dehumidification layer, and a cold air equalization chamber is located at the bottom of the cooling layer. A main shaft is provided along the tower body axis. Stirring fins are provided at the bottom of each steaming layer, dehumidification layer, and cooling layer, and the roots of each stirring fin are fixed to the main shaft. This millet husk steaming machine has high heat exchange efficiency, enables efficient continuous production, is easy to install and maintain, and improves the production environment.

Description

Technical Field

[0001] This utility model relates to a millet shell steaming machine, which is used for continuous steaming of millet shells with high pectin content and fine particle size, and belongs to the technical field of brewing equipment. Background Technology

[0002] Millet husks are an important auxiliary ingredient in solid-state liquor brewing and need to be steamed to remove the raw grain flavor and impurities such as pectin. Current production processes mainly involve steaming the millet husks in a steamer / steamer oven, which presents the following problems: 1. Low production efficiency: Traditional steamers / steam ovens cannot operate continuously, have poor sealing effects, and create a poor production environment, failing to meet environmental emission requirements; 2. Easy to leak and accumulate material: The perforated plate of traditional equipment has an excessively large hole diameter (≥1.5mm), and millet shells are easy to leak into the steam jacket, causing material loss and reducing heat exchange efficiency; moreover, the material leaking into the jacket will accumulate at the lowest point in the center, and can only be cleaned by stopping production and disassembling a large area, resulting in large downtime losses and easy pollution or odor. 3. Material caking: Traditional equipment has insufficient crushing force for caking millet shells, which can easily lead to poor steaming effect and uneven feeding. 4. High maintenance cost: The screen plate is a perforated plate with small holes. Traditionally, the screen plate and screen frame are an integral structure. Due to the large number of fixing holes on the screen plate, it is difficult to align all the fixing holes during on-site installation due to deformation. Moreover, the screen plate is very thin and is prone to local damage, which requires replacement of the whole plate. This is not only costly, but also makes it more difficult to align the fixing holes during replacement. 5. Inability to continuously adjust the material layer height: The material layer height is fixed and cannot be adjusted by the feeding opening, making it difficult to adjust the steaming time and ensuring the steaming effect; in addition, the top of each layer of material is prone to unevenness. Utility Model Content

[0003] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, and such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0004] In view of the problems existing in the above and / or prior art, this utility model is proposed.

[0005] The purpose of this invention is to overcome the problems existing in the prior art and provide a millet shell steamer with high heat exchange efficiency, which can realize efficient continuous production, is easy to install and maintain, and improves the production environment.

[0006] To solve the above technical problems, this utility model provides a millet shell steaming machine, comprising a cylindrical tower body, a feed inlet valve installed at the top of the tower body, multiple steaming layers in the upper part of the inner cavity of the tower body, a steam equalization chamber at the bottom of each steaming layer, and a modular sieve plate assembly at the top of each steam equalization chamber, each sieve plate assembly being composed of multiple independent sieve plate modules; a dehumidification layer and a cooling layer are arranged sequentially below the last steam equalization chamber, a hot air equalization chamber at the bottom of the dehumidification layer, and a cold air equalization chamber at the bottom of the cooling layer; a main shaft is arranged along the axis of the tower body, and stirring fins are respectively provided at the bottom of each steaming layer, dehumidification layer, and cooling layer, with the root of each stirring fin fixed to the main shaft.

[0007] Furthermore, each of the steaming layers is equipped with a material level sensor, each of the steam equalization chambers is equipped with an electric discharge gate controlled by the material height of the layer, and the last steam equalization chamber is equipped with a steaming discharge airlock controlled by the material level sensor of the layer and discharging material to the dehumidification layer; the dehumidification layer is equipped with a dehumidification layer material level sensor, the hot air equalization chamber is equipped with a dehumidification discharge airlock controlled by the dehumidification layer material level sensor; the cooling layer is equipped with a cooling layer material level sensor, and the cold air equalization chamber is equipped with a cooling discharge airlock controlled by the cooling layer material level sensor.

[0008] Furthermore, the electric unloading gate includes a door frame that passes through the steam equalization chamber. The lower end of the door frame is provided with an arc-shaped door that can be opened and closed. The two ends of the arc-shaped door are respectively welded to the arc surface of the fan-shaped support plate. A door hinge is fixed at the center of the fan-shaped support plate. The door hinge is hinged through a bearing seat, and an electric actuator for driving the arc-shaped door to open and close is installed at its end.

[0009] Furthermore, a grid-shaped vertical plate support is provided below the sieve plate assembly. The bottom of the grid-shaped vertical plate support is supported by multiple rivets in a cone-shaped hopper that is high in the middle and low around the edges. A steam inlet and a maintenance hand hole are provided on the side wall between the grid-shaped vertical plate support and the cone-shaped hopper, and a drain outlet is provided at the lower part of the side wall.

[0010] Furthermore, each of the sieve plate modules has an outer perimeter outline formed by a sieve frame. The long sides of the sieve frames are connected by multiple supporting ribs. The sieve plate surface covers the top of the sieve frame and the supporting ribs. A connecting block is provided at the corner of the sieve frame for fixed connection with the grid-shaped vertical plate below.

[0011] Furthermore, the diameter of the holes on the sieve plate is 0.5 mm.

[0012] Furthermore, each of the steaming layers has at least one steaming exhaust port on its upper sidewall. Each steaming exhaust port is connected to an exhaust pipe via an oblique branch pipe equipped with an exhaust regulating valve. A quick-opening hand hole is provided on the exhaust pipe at the position corresponding to the outlet of each oblique branch pipe.

[0013] Furthermore, a high level sensor is installed above the level sensor of the top steaming layer; a water spray pipe for evenly spraying the millet shells is installed on the top wall or upper side wall of the top steaming layer.

[0014] Furthermore, the stirring blade includes a stirring blade connected to the main shaft via a clamping shell. The stirring blade is provided with multiple upwardly upright guiding rakes, which are evenly arranged along the length of the stirring blade and at a certain angle to the top of the stirring blade.

[0015] Furthermore, the top of the hot air uniform air chamber and the cold air uniform air chamber are also provided with modular sieve plate assemblies, and the hole arrangement density of the sieve plate assembly of the dehumidification layer is higher than that of the sieve plate assembly of the steam uniform air chamber.

[0016] Compared with the prior art, the advantages or beneficial effects of this utility model include at least the following: 1. High efficiency, continuous operation and environmental protection: It realizes continuous automated production of millet shell steaming, dehumidification and cooling, which greatly improves production efficiency; the fully enclosed structure eliminates material and steam leakage, improves the working environment and easily meets environmental protection requirements; 2. Leakage prevention and energy saving: The modular screen plate with a 0.5mm aperture effectively prevents the leakage of fine millet shells, reducing material loss; steam penetrates the material layer evenly, ensuring sufficient heat exchange and improving thermal energy utilization efficiency; and the material that leaks into the interlayer is easy to clean. 3. Stable and reliable operation: The unique combination design of stirring blades and guide rakes can effectively break up material caking, ensure smooth material flow, avoid blockage and uneven cleaning, ensure long-term stable operation of the equipment, and keep the top of the material layer flat. 4. Convenient and economical maintenance: The modular design of the screen plate assembly and the robust support structure make the replacement of vulnerable parts quick, convenient and inexpensive, greatly reducing equipment downtime and maintenance costs. 5. Strong process controllability: The intelligent feedback control system based on material level sensors can accurately adjust the height of each material layer and the material residence time, making the steaming process parameters flexible and adjustable to adapt to raw materials of different qualities, ensuring the stability and optimization of the final product quality. 6. Functional integration and space saving: The steaming, dehumidification and cooling functions are integrated into one compact structure, which reduces the number of equipment and the floor space required. At the same time, the discharge temperature is suitable and can be directly used for subsequent processes, reducing the need for additional cooling equipment and pollution risks. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. The drawings are provided for reference and illustration only and are not intended to limit this utility model. Wherein: Figure 1 This is a three-dimensional perspective view of the millet shell steamer of this utility model; Figure 2 This is the front view of the millet shell steamer of this utility model; Figure 3 This is a perspective view of the millet shell steamer of this utility model; Figure 4 This is an exploded view of the steam equalization chamber in this utility model; Figure 5 This is a perspective view of the sieve plate assembly in this utility model; Figure 6 This is a cross-sectional view of the steam equalization chamber in this utility model; Figure 7 This is a perspective view of the electric unloading gate in this utility model; Figure 8 This is a perspective view of the stirring blade in this utility model; Figure 9 This is a perspective view of the exhaust pipe in this utility model.

[0018] Attached reference numerals: 1. Tower body; 1a. Feed air shut-off valve; 1b. Steam exhaust port; 1c. Main shaft; 2. Steaming layer; 2a. Water spray pipe; 2b. High level sensor; 2c. Level sensor; 2d. Steaming discharge airlock; 3. Steam equalization chamber; 3a. Steam inlet; 3b. Sieve plate assembly; 3b1. Sieve plate module one; 3b1a. Sieve plate surface; 3b1b. Sieve frame; 3b1c. Supporting ribs; 3b1d. Connecting block; 3b2. Sieve plate module two; 3b3. Sieve plate module three; 3b4. Sieve plate module four; 3b5. Sieve plate module five; 3c. Grid-shaped vertical plate support; 3d. Tie nail; 3e. Conical hopper; 3f. Drain outlet; 3g. Inspection manhole; 4. Electric unloading gate; 4a. Gate frame; 4b. Curved gate; 4c. Fan-shaped support plate; 4d. Gate hinge; 4e. Electric actuator; 5. Dehumidification layer; 5a. Dehumidification layer level sensor; 5b. Dehumidification discharge airlock; 6. Hot air uniform distribution chamber; 7. Cooling layer; 7a. Cooling layer level sensor; 7b. Cooling discharge airlock; 8. Cool air distribution room; 9. Agitator wings; 9a. Clamping shell; 9b. Agitator blade; 9c. Feed rake; 10. Exhaust pipe; 10a. Exhaust regulating valve; 10b. Quick-opening hand hole. Detailed Implementation

[0019] In the following description of this utility model, the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not mean that the device must have a specific orientation.

[0020] To make the technical means, creative features, achieved objectives and effects of this utility model easier to understand, the present utility model will be further described below with reference to specific illustrations. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0022] like Figures 1 to 9 As shown, the millet shell steamer of this utility model includes a cylindrical tower body 1. A feed inlet valve 1a is installed at the feed port at the top of the tower body 1. Multiple steaming layers 2 are provided in the upper part of the inner cavity of the tower body 1. A steam equalization chamber 3 is provided at the bottom of each steaming layer 2. A dehumidification layer 5 is provided below the bottom steam equalization chamber. A hot air equalization chamber 6 is provided at the bottom of the dehumidification layer 5. A cooling layer 7 is provided below the hot air equalization chamber 6. A cold air equalization chamber 8 is provided at the bottom of the cooling layer 7. A main shaft 1c is provided along the axis of the tower body. Stirring fins 9 are provided at the bottom of each steaming layer 2, dehumidification layer 5 and cooling layer 7. The root of each stirring fin 9 is fixed on the main shaft 1c.

[0023] After the millet husks enter the inner cavity of the tower through the feed valve 1a, they first pass through each steaming layer 2. Each steaming layer 2 has a steam equalization chamber 3 at its bottom. Steam flows upward from the steam equalization chamber 3, passing through evenly distributed small holes on the sieve plate assembly 3b to steam the millet husks. The steamer adopts a sealed, multi-layered cylindrical space, ensuring good sealing, no leakage, and reduced floor space. The multi-layered steaming layers 2 improve steam utilization efficiency, increasing output while maintaining steaming effect. Furthermore, any number of steaming layers 2 can be connected in series according to the specific steaming output, providing sufficient steaming time to guarantee the steaming effect and further reducing the floor space required.

[0024] Below the steaming layer 2 is a dehumidification layer 5. After steaming, hot air can control the moisture content of the millet husks, ensuring the quality of the output and extending its service life. At the bottom of the dehumidification layer 5 is a hot air distribution chamber 6. Hot air can enter the hot air distribution chamber 6 through one or more air inlets, then penetrate upwards through the densely perforated sieve plate assembly, making full contact with the millet husks. The sieve plate assembly of the air layer has the same structure as the sieve plate assembly 3b of the steam layer, but the perforation density of the dehumidification layer 5 is higher.

[0025] Below the dehumidification layer 5 is a cooling layer 7, and at the bottom of the cooling layer 7 is a cold air distribution chamber 8. Filtered room temperature air can pass through one or more air inlets and upwards through the cold air distribution chamber 8 to cool the millet shells in reverse contact. In this way, the millet shells can be used immediately after they come out of the equipment, reducing the need for subsequent cooling and spreading equipment, reducing sources of pollution, and avoiding contamination by other bacteria.

[0026] Each steaming layer 2 is equipped with a material level sensor 2c, and each steam equalization chamber 3 is equipped with an electric discharge gate 4 controlled by the material height of the layer. The last steam equalization chamber is equipped with a steam discharge airlock 2d controlled by the material level sensor 2c of the layer and discharging material to the dehumidification layer 5, so as to realize the material layer height control of each steaming layer. The steam discharge airlock 2d isolates the gas phase between the steaming layer 2 and the dehumidification layer 5 while discharging material.

[0027] The dehumidification layer 5 is equipped with a dehumidification layer level sensor 5a, and the hot air uniform chamber 6 is equipped with a dehumidification discharge airlock 5b controlled by the dehumidification layer level sensor 5a; the dehumidification discharge airlock 5b isolates the gas phase between the dehumidification layer 5 and the cooling layer 7 while discharging material.

[0028] The cooling layer 7 is equipped with a cooling layer level sensor 7a, and the cold air distribution chamber 8 is equipped with a cooling discharge airlock 7b controlled by the cooling layer level sensor 7a.

[0029] The electric feeding gate 4 includes a gate frame 4a that passes through the steam equalization chamber 3. The lower end of the gate frame 4a is provided with an openable and closable arc-shaped gate 4b. The two ends of the arc-shaped gate 4b are respectively welded to the arc surface of the fan-shaped support plate 4c. A gate hinge 4d is fixed at the center of the fan-shaped support plate 4c. The inner gate hinge is hinged to the gate frame 4a through a bearing seat, and the outer gate hinge is supported on the side wall of the tower body through a bearing seat. An electric actuator 4e is installed at the end of the outer gate hinge, which can adjust the opening of the gate in real time according to the material layer height to achieve accurate control of the material layer height.

[0030] The top of the steam equalization chamber 3 is provided with a modular sieve plate assembly 3b, and below the sieve plate assembly 3b is a grid-shaped vertical plate support 3c. The bottom of the grid-shaped vertical plate support 3c is supported in the inverted cone 3e by multiple tie rods 3d. The side wall between the grid-shaped vertical plate support 3c and the cone 3e is symmetrically provided with a steam inlet 3a and a maintenance hand hole 3g, and a drain outlet 3f is provided at the lower part of the side wall.

[0031] Because the average particle size of millet is very small (≤0.6mm), the diameter of the small holes on the sieve plate is 0.5mm to prevent material leakage; the sieve plate assembly 3b above the gas equalization chamber 3 adopts a modular design, which is composed of sieve plate module one 3b1, sieve plate module two 3b2, sieve plate module three 3b3, sieve plate module four 3b4 and sieve plate module five 3b5.

[0032] Taking screen plate module 3b1 as an example, each screen plate module is formed by a screen frame 3b1b, whose outer contour is composed of multiple supporting ribs 3b1c. This improves the overall rigidity and strength. The screen plate surface 3b1a covers the top of the screen frame 3b1b and the supporting ribs 3b1c. When a part of the screen plate surface is damaged, only the corresponding module needs to be replaced, avoiding the need for complete replacement. Connecting blocks 3b1d are provided at the corners of the screen frame, allowing screws to be connected to the fixing blocks welded to the top of the grid-shaped vertical plate support 3c through the screw holes on the connecting blocks 3b1d, facilitating assembly and disassembly.

[0033] Below the sieve assembly 3b, a grid-shaped vertical support 3c is used to prevent deformation of the sieve assembly 3b, ensuring its flatness and reducing material residue during discharge. The grid-shaped vertical support 3c is welded to the inner wall of the conical hopper 3e by a number of cylindrical rivets 3d. Steam simultaneously enters the space below the grid-shaped vertical support 3c from each steam inlet 3a, passes upwards through the sieve assembly 3b, and evenly enters the material layer to steam the millet husks.

[0034] The cone 3e is inverted, with a higher center and lower edges, which facilitates the collection of condensate around the inverted cone 3e and its discharge from the drain port 3f. Several inspection manholes 3g with sight glasses are arranged around the perimeter of the steam equalization chamber 3 for easy observation of its internal condition. Furthermore, any material leaking into the steam equalization chamber 3 will be carried by the water flow and collect near the drain port 3f or on the outer periphery of the cone 3e. Opening the inspection manholes 3g allows for convenient cleaning of impurities inside the cone 3e.

[0035] Each steaming layer 2 has at least one steaming exhaust port 1b on its upper sidewall. Each steaming exhaust port 1b is connected to the exhaust pipe 10 via an inclined branch pipe. Each inclined branch pipe is equipped with an exhaust regulating valve 10a. The exhaust pipe 10 has quick-opening manholes 10b at locations corresponding to the outlets of each inclined branch pipe. Under the suction of the exhaust pipe 10, the exhaust from each steaming layer 2 flows into the exhaust pipe 10 via the exhaust regulating valves 10a, removing excess moisture generated during steaming, preventing condensation and bacterial growth inside the equipment, reducing the moisture content of the millet husks, and decreasing the drying load. The exhaust pipe 10 has a quick-opening manhole 10b at each layer position, allowing for timely observation of the steam extraction effect and checking the opening degree of the exhaust regulating valves 10a and the material level.

[0036] A high level sensor 2b is installed above the top-level material level sensor 2c. When the material level is too high, the high level sensor 2b is triggered to alarm, stopping or reducing the feeding of the feed air shut-off valve 1a to avoid equipment damage.

[0037] The top wall or upper side wall of the top steaming layer is equipped with a water spray pipe 2a that sprays water evenly onto the millet husks. Spraying the millet husks with water before steaming allows the moisture content of the material in the first steaming layer to be adjusted according to the moisture content of the raw materials. This not only improves the steaming effect and the quality of the material, but also prevents the risk of spontaneous combustion inside the steamer.

[0038] In this embodiment, a three-layer steaming layer is used as an example. During production, millet shells fall into the first steaming layer through the feed air valve 1a. Under the action of the stirring fins 9, they are spread along the bottom circumference of the first steaming layer. The electric feeding gates 4 of the first and second steaming layers are in the open state. The material falls from the first steaming layer into the second steaming layer, and then from the second steaming layer into the third steaming layer. The steaming feed air valve 2d of the third steaming layer is in the closed state. As the stirring fins 9 rotate and the material is fed, the material level of the third steaming layer slowly rises.

[0039] When the material level of the third layer rises to the point where the float of the material level sensor 2c swings, the arc-shaped door 4b of the second layer electric discharge door slowly closes. The opening of the material door is adjusted according to the height of the float of the third layer material level sensor, and the material level in the second steaming layer slowly rises.

[0040] When the material level of the second layer rises to the point where the float of the material level sensor 2c swings, the arc-shaped door 4b of the first layer electric discharge door slowly closes. The opening of the material door is adjusted according to the height of the float of the second layer material level sensor. The material level in the first steaming layer slowly rises. When the material level rises to the point where the float of the top layer material level sensor 2c swings, the steaming discharge airlock 2d of the third steaming layer starts and automatically adjusts the speed according to the material level of the first steaming layer.

[0041] Material falls from the steaming feed airlock 2d of the third steaming layer into the dehumidification layer 5. At this time, the dehumidification feed airlock 5b at the bottom of the dehumidification layer 5 is in the closed state. The material level in the dehumidification layer 5 slowly rises. When the material level rises to the point where the float of the dehumidification layer material level sensor 5a swings, the dehumidification feed airlock 5b starts to start and automatically adjusts its speed according to the material level in the dehumidification layer 5.

[0042] Material falls from the dehumidifying discharge airlock 5b into the cooling layer 7. At this time, the cooling discharge airlock 7b is in the closed state. The material level in the cooling layer 7 slowly rises. When the material level rises to the point where the float of the cooling layer material level sensor 7a swings, the cooling discharge airlock 7b starts and automatically adjusts its speed according to the material level in the cooling layer 7.

[0043] like Figure 1 , Figure 3 , Figure 8As shown, each layer of the equipment is equipped with stirring blades 9, which are used to push the material to spread and clean it. The stirring blades 9 are connected to the main shaft through a clamp 9a, and torque is transmitted between the two through a key. Because the stirring blades 9 generate centrifugal thrust on the material during the stirring process, the material surface is prone to a shape that is low in the middle and high around the edges. Therefore, this steaming machine is equipped with multiple upward-pointing guide rakes 9c on the stirring blades 9b of the stirring blades 9. The guide rakes 9c are evenly arranged along the length of the stirring blades 9b and are inclined at a certain angle to the top of the stirring blades 9b. They are used to stir the material layer while gathering the surrounding material towards the central area, so that the top surface of the material layer remains flat. The base of the guide rakes 9c is fixed to the stirring blades 9b with bolts for easy installation, disassembly and maintenance.

[0044] The above description is merely a preferred embodiment of the present utility model, showing and describing the basic principles, main features, and advantages of the present utility model. It is not intended to limit the scope of patent protection of the present utility model. Those skilled in the art should understand that the present utility model is not limited to the above embodiments. In addition to the above embodiments, the present utility model may have other implementations without departing from the spirit and scope of the present utility model. Various changes and improvements to the present utility model are also possible. All technical solutions formed by equivalent substitutions or equivalent transformations fall within the scope of protection claimed by the present utility model. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents. Technical features not described in the present utility model can be implemented by or using existing technology, and will not be elaborated here.

Claims

1. A millet shell steaming machine, comprising a cylindrical tower body (1), wherein a feed air shut-off valve (1a) is installed at the feed inlet at the top of the tower body (1), characterized in that: The upper part of the inner cavity of the tower body (1) is provided with multiple steaming layers (2), and the bottom of each steaming layer (2) is provided with a steam equalization chamber (3). The top of each steam equalization chamber (3) is provided with a modular sieve plate assembly (3b). Each sieve plate assembly (3b) is composed of multiple independent sieve plate modules. The screen plate assembly (3b) is provided with a grid-shaped vertical plate support (3c) below it. The bottom of the grid-shaped vertical plate support (3c) is supported by multiple rivets (3d) in a cone-shaped hopper (3e) that is high in the middle and low around the edges. The cone-shaped hopper (3e) is an inverted shape with a high middle and low around the edges. The side wall between the grid-shaped vertical plate support (3c) and the cone-shaped hopper (3e) is provided with a steam inlet (3a) and a maintenance hand hole (3g). A drain outlet (3f) is provided at the lower part of the side wall. Each of the sieve plate modules has an outer perimeter formed by a sieve frame. The long sides of the sieve frames are connected by multiple supporting ribs. The sieve plate surface covers the top of the sieve frame and the supporting ribs. The corner of the sieve frame is provided with a connecting block for fixed connection with the grid-shaped vertical plate support (3c) below. The diameter of the small hole on the sieve plate surface (3b1a) is 0.5mm. Below the last steam equalization chamber (3), there are a dehumidification layer (5) and a cooling layer (7) in sequence. The bottom of the dehumidification layer (5) is provided with a hot air equalization chamber (6), and the bottom of the cooling layer (7) is provided with a cold air equalization chamber (8). A main shaft (1c) is provided along the tower body axis. The bottom of each steaming layer (2), dehumidification layer (5) and cooling layer (7) is provided with stirring fins (9), and the root of each stirring fin (9) is fixed on the main shaft (1c).

2. The millet shell steamer according to claim 1, characterized in that: Each of the steaming layers (2) is equipped with a material level sensor (2c), each of the steam equalization chambers (3) is equipped with an electric discharge gate (4) controlled by the material height of the layer, and the last steam equalization chamber (3) is equipped with a steam discharge airlock (2d) controlled by the material level sensor (2c) of the layer and discharging material to the dehumidification layer (5); the dehumidification layer (5) is equipped with a dehumidification layer material level sensor (5a), the hot air equalization chamber (6) is equipped with a dehumidification discharge airlock (5b) controlled by the dehumidification layer material level sensor (5a); the cooling layer (7) is equipped with a cooling layer material level sensor (7a), and the cold air equalization chamber (8) is equipped with a cooling discharge airlock (7b) controlled by the cooling layer material level sensor (7a).

3. The millet shell steamer according to claim 2, characterized in that: The electric unloading gate (4) includes a door frame (4a) that passes through the steam equalization chamber (3). The lower end of the door frame (4a) is provided with an arc-shaped door (4b) that can be opened and closed. The two ends of the arc-shaped door (4b) are respectively welded to the arc surface of the fan-shaped support plate (4c). A door hinge (4d) is fixed at the center of the fan-shaped support plate (4c). The door hinge (4d) is hinged through a bearing seat, and an electric actuator (4e) that drives the arc-shaped door (4b) to open and close is installed at its end.

4. The millet shell steamer according to claim 1, characterized in that: Each of the steaming layers (2) has at least one steaming exhaust port (1b) on its upper sidewall. Each steaming exhaust port (1b) is connected to the exhaust pipe (10) through an oblique branch pipe equipped with an exhaust regulating valve (10a). The exhaust pipe (10) is provided with a quick-opening hand hole (10b) at the part corresponding to the outlet of each oblique branch pipe.

5. The millet shell steamer according to claim 1, characterized in that: A high level sensor (2b) is installed above the level sensor (2c) of the top steaming layer (2); a water spray pipe (2a) for uniformly spraying millet shells is installed on the top wall or upper side wall of the top steaming layer (2).

6. The millet shell steamer according to claim 1, characterized in that: The stirring blade (9) includes a stirring blade (9b) connected to the main shaft (1c) via a clamp (9a). The stirring blade (9b) is provided with a plurality of upwardly upright guide rakes (9c). The guide rakes (9c) are evenly arranged along the length of the stirring blade (9b) and are inclined at a certain angle to the top of the stirring blade (9b).

7. The millet shell steamer according to any one of claims 1 to 6, characterized in that: The top of the hot air uniform chamber (6) and the cold air uniform chamber (8) are also provided with modular sieve plate assemblies (3b), and the hole arrangement density of the sieve plate assembly (3b) of the dehumidification layer (5) is higher than that of the sieve plate assembly (3b) of the steam uniform chamber (3).

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