A continuous high-temperature fluidized drying system for grains and its drying process

Abstract

The present invention relates to the technical field of grain drying equipment, specifically a continuous grain high-temperature fluidized drying system and a drying process thereof, wherein the drying system comprises a first elevator, a drying fluidized bed, a second elevator, a slow-release tower, and a conveyor which are sequentially arranged; the drying fluidized bed comprises a drying chamber, the bottom of which is connected to an air intake injection pipeline, the upper part of which is respectively connected to a feed bin and an exhaust pipeline, the output end of the first elevator is arranged at the inlet end of the feed bin, the discharge end of the air intake injection pipeline is connected to a discharge bin, the top and bottom of the discharge bin are both open, the top opening of the discharge bin is connected to the drying chamber, and the bottom opening of the discharge bin is arranged at the input end of the second elevator; the slow-release tower comprises a tower body, and the output end of the second elevator is arranged at the feed inlet of the tower body. The present invention ensures the uniformity of moisture after grain drying with its characteristics of continuous, high temperature and rapid vulcanization drying, while occupying a small area.

Description

Technical Field

[0001] The invention relates to the technical field of grain drying equipment, in particular to a continuous grain high-temperature fluidized drying system and a drying process thereof. Background Art

[0002] The existing fluidized bed grain drying system, such as the fluidized bed grain drying device recorded in the authorization announcement number CN204787602U, uses a blower to blow hot air from the bottom of the fluidized bed into the drying chamber to dry the rice inside.

[0003] Most of the traditional fluidized bed rice drying devices are independently set up and cannot provide continuous processing for drying large amounts of grains. The working efficiency is low. In addition, the temperature of the dried grains is too high to enter the barn directly. The existing drying system does not have a slow cooling structure and cannot provide a suitable environment for cooling the grains. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a continuous grain high-temperature fluidized drying system and a drying process thereof.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] A continuous high-temperature fluidized grain drying system comprises a first elevator, a drying fluidized bed, a second elevator, a slow tower, and a conveyor which are arranged in sequence;

[0007] The drying fluidized bed comprises a drying chamber, the bottom of the drying chamber is connected to an air inlet injection pipe, the upper part of the drying chamber is respectively connected to a feed bin and an exhaust pipe, the output end of the first elevator is arranged at the inlet end of the feed bin, the discharge end of the air inlet injection pipe is connected to a discharge bin, the top and bottom of the discharge bin are both open, the top opening of the discharge bin is connected to the drying chamber, and the bottom opening of the discharge bin is arranged at the input end of the second elevator;

[0008] The slow tower comprises a tower body, a feed port is arranged at the top of the tower body, a discharge port is arranged at the bottom of the tower body, the output end of the second elevator is arranged at the feed port of the tower body, and the discharge port of the tower body is arranged at the input end of the conveyor.

[0009] The air inlet injection pipe of the drying fluidized bed is divided into a plurality of air inlet channels by a plurality of partitions, the air inlet direction of the air inlet channels is inclined, and a damper mechanism capable of controlling the intermittent opening and closing of the air inlet channels is arranged in each air inlet channel;

[0010] The damper mechanism includes a door plate, the door plate is fixedly connected to a shaft, both ends of the shaft are respectively rotatably connected to the side wall of the intake injection pipe, one end of the shaft penetrates the side wall of the intake injection pipe and is connected to a first driving mechanism, the first driving mechanism can intermittently drive the shaft to rotate in one direction, the shaft is also connected to a return mechanism, and the return mechanism can drive the shaft to rotate and return in another direction;

[0011] The first driving mechanism includes a paddle, which is fixedly connected to one end of a shaft that penetrates a side wall of an intake injection pipe, the intake injection pipe is rotatably provided with at least one first transmission sprocket, the first transmission sprocket is connected to a first chain, a plurality of evenly distributed protrusion structures are fixedly provided on the first chain, the protrusion structures can drive the paddle to rotate in one direction, the first chain is connected to a first driving sprocket, and the first driving sprocket is connected to a first driving motor;

[0012] The protrusion structure is a cylindrical protrusion or a sheet-like protrusion structure;

[0013] The return mechanism uses a return torsion spring, which is arranged between the shaft rod and the side wall of the intake injection pipe.

[0014] The outside of the intake injection pipe is provided with multiple groups of first limiting mechanisms and second limiting mechanisms, and the first limiting mechanisms and the second limiting mechanisms are both arranged corresponding to the paddles. The first limiting mechanism includes two bending plates fixedly connected to the outside of the intake injection pipe, the two bending plates are arranged opposite to each other, and there is a gap between them, and the first chain can just be slidably connected between the two bending plates. The second limiting mechanism includes a support plate, and a limiting column is detachably installed on the support plate. The limiting column is arranged on one side close to the lower end of the paddle, and a scale line is arranged on the support plate.

[0015] The top of the feed bin is an entrance, and the bottom is an exit. A feed mechanism is arranged in the feed bin, and the feed mechanism includes a feed plate and two feed rollers. A plurality of feed partition plates evenly distributed around the center of a circle are fixedly arranged on the outer surface of the feed rollers. The feed rollers are connected to a second driving mechanism. A feed plate is arranged on the upper part of the two feed rollers. The feed plate is an inverted V-shaped structure. The entrance of the feed bin is located directly above the feed plate. The feed plate is located at the upper part of the gap between the two feed rollers and can cover part of the structure of the two feed rollers in the vertical direction.

[0016] The second driving mechanism includes a second transmission sprocket, the central axes of the two feed roller shafts are respectively rotatably connected to the side walls of the feed bin, and one end of the central axis passes through the side wall of the feed bin and is fixedly connected to the second transmission sprocket, the second transmission sprocket is connected to the second chain, the second chain is connected to the second driving sprocket, and the second driving sprocket is connected to the second driving motor;

[0017] An inlet flow scale and an inlet moisture detector are arranged on the top of the feed bin, and a material level detection mechanism is arranged in the feed bin.

[0018] A mesh plate is arranged at the upper part of the air intake injection pipe, and a plurality of blowing devices are respectively connected to the lower part of the air intake injection pipe through a plurality of branch pipes, the blowing devices are connected to a control valve, and temperature detection sensors are arranged in the branch pipes and the exhaust pipe.

[0019] The tower body of the slow tower is provided with a ventilation section, and ventilation holes are opened on the tower body of the ventilation section, and the ventilation holes are respectively opened on the first side wall and the second side wall parallel to the tower body, and the ventilation holes are arranged in rows, and several rows of ventilation holes on the first side wall are cross-arranged with several rows of ventilation holes on the second side wall, and the ventilation holes on the first side wall and the second side wall are respectively fixedly connected with shielding plates, and the shielding plates are in an inverted V-shaped structure, and two adjacent rows of shielding plates are staggered in the vertical direction;

[0020] The first side wall is externally connected to an air guide cover, one end of the air guide cover is connected to all ventilation holes on the first side wall, and the other end of the air guide cover is connected to an air guide pipe;

[0021] A plurality of louver boards are connected to the second side wall, and each louver board is correspondingly arranged at the upper part of a row of ventilation holes.

[0022] The tower body is provided with a grille section, which is arranged on the upper part of the ventilation section, and a horizontally arranged grille mesh structure is arranged inside the grille section.

[0023] The tower body is provided with a discharge section, which is arranged at the lower part of the ventilation section. The discharge section includes multiple groups of discharge mechanisms, which include two discharge rollers, a discharge plate and two guide plates. The outer surface of the discharge roller is fixedly provided with multiple discharge partition plates evenly distributed around the center of the circle. The discharge roller is connected to the driving mechanism. The upper part of the two discharge rollers is provided with a discharge plate, which is an inverted V-shaped structure. The discharge plate is located at the upper position of the gap between the two discharge rollers and can cover part of the structure of the two discharge rollers in the vertical direction. The two guide plates are respectively located at the upper position of the two discharge rollers in the vertical direction;

[0024] The driving mechanism includes a transmission sprocket, the central axes of the two discharge roller shafts are respectively connected to the tower body for rotation, and one end of the central axis passes through the tower body and is fixedly connected to the transmission sprocket, the transmission sprocket is connected to the chain, the chain is connected to the driving sprocket, and the driving sprocket is connected to the driving motor;

[0025] The guide plate is arranged to be inclined relative to the vertical direction. The guide plate is arranged in at least two stages, and the inclination directions of the guide plates at two adjacent stages are opposite. Both ends of the guide plate and the discharge plate are fixedly connected to the tower body.

[0026] The feed inlet at the top of the tower body is provided with a mounting plate, on which a material level detection mechanism is provided, a plurality of rotary level control devices are provided inside the tower body, and the plurality of rotary level control devices are respectively arranged at different heights of the tower body, and the discharge port at the bottom of the tower body is a conical structure, and a moisture meter and an outlet flow scale are provided in the discharge port.

[0027] Continuous grain high temperature fluidized drying system, its drying process is:

[0028] 1) The grains are transported to the input end of the first elevator by the conveying mechanism, and then transported to the inlet end of the feed bin of the drying fluidized bed by the first elevator, and then enter the drying chamber from the feed bin;

[0029] 2) The hot air ejected from the air inlet injection pipe in the drying fluidized bed performs pulse spray drying on the grains entering the drying chamber, and drives the grains to gradually move toward the discharge bin. The grains eventually flow out of the drying fluidized bed from the bottom outlet of the discharge bin. The wet air and grain impurities after drying the grains in the drying chamber are discharged from the exhaust pipe;

[0030] 3) The grains flowing out of the discharge bin of the drying fluidized bed fall on the input end of the second elevator, and the second elevator transports the grains to the top of the slow tower, where the grains flow downward and gradually cool down;

[0031] 4) Finally, the grains flow out from the outlet at the bottom of the slow tower, fall on the input end of the conveyor, and are sent to the silo by the conveyor.

[0032] The beneficial effects achieved by the present invention are:

[0033] The present invention proposes a continuous high-temperature fluidized drying system for grains, which ensures the uniformity of moisture after grain drying by its continuous, high-temperature and rapid vulcanization drying characteristics, while effectively removing impurities and empty shells, and can reduce the volume by 10%-20%, thereby directly reducing the storage area requirement; in addition, the system has a low grain breakage rate, can effectively kill insects at temperatures above 60°C, improves equipment efficiency and output, and occupies a small area, and is an efficient grain drying solution.

[0034] The bottom of the drying chamber of the drying fluidized bed of the present invention is a segmented air intake, and each air intake channel is an intermittent pulse air intake, so that the hot air intake can produce an impact force on the grain to move forward while drying the grain, so that the grain gradually moves toward the discharge bin to avoid grain accumulation, while ensuring that the grain is fully in contact with the hot air, thereby improving the drying efficiency.

[0035] The feed bin of the drying fluidized bed of the present invention can realize quantitative and uniform feeding, thereby facilitating the control of the speed and flow rate of grains entering the drying chamber, and conveniently controlling the drying progress and efficiency.

[0036] The slow drying tower of the present invention is used to receive grains after drying in a dry fluidized bed. The grains are gradually cooled down inside the tower body, especially through ventilation and cooling in the ventilation section, so that the temperature of the grains can be quickly reduced to the required temperature, which is convenient for subsequent storage in a warehouse; in addition, a certain impurity removal effect can also be achieved during the ventilation and cooling process.

[0037] The discharging section of the slow tower of the present invention can realize quantitative and constant speed discharging, thereby realizing uniform discharging.

[0038] The slow-release tower of the present invention is independently arranged, occupies a small area, and can be flexibly placed and installed. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0040] Figure 1 It is a schematic structural diagram of a drying fluidized bed of the present invention;

[0041] Figure 2 is a schematic structural diagram of the drying fluidized bed of the present invention (exploded view);

[0042] Figure 3 It is a schematic diagram of the structure of the air inlet injection pipeline of the drying fluidized bed of the present invention;

[0043] Figure 4 yes Figure 3 Exploded view of;

[0044] Figure 5 This is a schematic diagram of the structure of the air inlet injection pipeline of the drying fluidized bed of the present invention (part of the structure is enlarged);

[0045] Figure 6 It is a structural schematic diagram of the first driving mechanism of the drying fluidized bed of the present invention (the first structural form);

[0046] Figure 7 It is a schematic diagram of the structure of the first driving mechanism of the drying fluidized bed of the present invention (the second structural form);

[0047] Figure 8 It is a schematic structural diagram of a feed bin of a drying fluidized bed of the present invention;

[0048] Fig. 9 yes Figure 8 Exploded view of;

[0049] Fig.10 It is a schematic diagram of the structure of the feed roller of the drying fluidized bed of the present invention;

[0050] Fig.11It is a partial structural schematic diagram of the feeding bin of the drying fluidized bed of the present invention;

[0051] Fig.12 It is a structural diagram of the material level detection mechanism;

[0052] Fig.13 It is a structural schematic diagram of the slow tower of the present invention;

[0053] Fig.14 It is a structural schematic diagram of the slow tower of the present invention (exploded view);

[0054] Fig.15 This is a schematic structural diagram of the top feed port of the slow tower of the present invention;

[0055] Fig.16 It is a structural schematic diagram of the slow tower grid section of the present invention;

[0056] Fig.17 It is a structural schematic diagram of the ventilation section of the slow tower of the present invention;

[0057] Fig.18 yes Fig.17 Exploded structure diagram;

[0058] Fig.19 It is a structural schematic diagram of the discharge section of the slow tower of the present invention;

[0059] Fig. 20 yes Fig.19 Exploded structure diagram;

[0060] Fig.21 It is a schematic structural diagram of the discharge roller shaft of the slow tower of the present invention.

[0061] In the figure: 1, drying fluidized bed; 11, feeding bin; 111, second driving sprocket; 112, second transmission sprocket; 113, second driving motor; 114, feeding plate; 115, feeding roller; 1151, feeding partition plate; 116, material level detection mechanism; 1161, fixing rod; 1162, fixing plate; 1163, baffle; 12, drying chamber; 13, exhaust duct; 14, air inlet injection duct; 141, mesh plate; 142, first driving mechanism; 1421, dial Plate; 1422, bending plate; 1423, supporting plate; 1424, limiting column; 1425, scale line; 1426, first chain; 1427, protruding structure; 1428, connecting hole; 1429, connecting groove; 143, door plate; 144, shaft; 145, partition; 146, first driving motor; 147, first driving sprocket; 15, bracket; 16, branch pipeline; 17, second protection plate; 18, first protection plate; 19, discharge bin; 191, blocking plate;

[0062] 2. Slow tower; 21. Tower body; 211. Feed inlet; 2111. Mounting plate; 212. Grille section; 2121. Grille mesh structure; 213. Ventilation section; 2131. Ventilation hole; 2132. Shielding plate; 2133. First side wall; 2134. Second side wall; 214. Discharge section; 2141. Driving motor; 2142. Driving sprocket; 2143. Transmission sprocket; 2144. Guide plate; 2145. Discharge roller; 21451. Discharge partition plate; 2146. Discharge plate; 215. Discharge port; 22. Support frame; 23. Air guide hood; 24. Air guide duct; 25. Protective plate. DETAILED DESCRIPTION

[0063] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0064] Example:

[0065] like Figure 1-Figure 21 As shown, a continuous high-temperature fluidized drying system for grains includes a first elevator, a drying fluidized bed 1, a second elevator, a slow tower 2, and a conveyor, which are arranged in sequence. The first elevator, the second elevator, and the conveyor are all conventional conveying equipment.

[0066] The drying fluidized bed 1 includes a drying chamber 12, the bottom of the drying chamber 12 is connected to an air intake injection pipe 14, the upper part of the drying chamber 12 is respectively connected to a feed bin 11 and an exhaust pipe 13, the output end of the first elevator is arranged at the inlet end of the feed bin 11, the discharge end of the air intake injection pipe 14 is connected to a discharge bin 19, the top and bottom of the discharge bin 19 are both open, the top opening of the discharge bin 19 is connected to the drying chamber 12, and the bottom opening of the discharge bin 19 is arranged at the input end of the second elevator.

[0067] The slow tower 2 includes a tower body 21, a feed port 211 is arranged at the top of the tower body 21, a discharge port 215 is arranged at the bottom of the tower body 21, the output end of the second elevator is arranged at the feed port 211 of the tower body 21, and the discharge port 215 of the tower body 21 is arranged at the input end of the conveyor.

[0068] The specific structure of the drying fluidized bed 1 is as follows: Figure 1-Figure 5 As shown, the drying fluidized bed 1 includes a drying chamber 12, the bottom of which is connected to an air intake injection pipe 14, the upper part of which is respectively connected to a feed bin 11 and an exhaust pipe 13, the interior of the air intake injection pipe 14 is divided into a plurality of air intake channels by a plurality of partitions 145, the air intake direction of the air intake channel is inclined, and a damper mechanism capable of controlling the intermittent opening and closing of the air intake channel is provided in the air intake channel.

[0069] Similar to the existing structure, the feed bin 11 is arranged at one end of the drying chamber 12, and the grains enter from the upper end of the drying chamber 12. In the above structure, the air intake injection pipe 14 is divided into multiple air intake channels, so that hot air enters from multiple channels at the bottom of the drying chamber 12 respectively, and the air intake channels are independently controlled to open and close, so that the air intake can be controlled in sections. In addition, the air intake channels are intermittently opened and closed, so that intermittent pulse-like upward air intake can be formed, which has an intermittent impact effect on the grains in the drying chamber 12. Combined with the inclined air intake channels, the hot air intake can produce a forward impact force on the grains while drying the grains, so that the grains gradually move toward the discharge bin 19 to avoid grain accumulation. At the same time, it ensures that the grains are fully in contact with the hot air, thereby improving the drying efficiency.

[0070] The damper mechanism includes a door plate 143, which can close the air intake passage. The door plate 143 is fixedly connected to a shaft 144, and both ends of the shaft 144 are rotatably connected to the side walls of the air intake injection pipe 14 respectively. One end of the shaft 144 penetrates the side wall of the air intake injection pipe 14 and is connected to the first driving mechanism 142. The first driving mechanism 142 can intermittently drive the shaft 144 to rotate in one direction. When rotating, the door plate 143 closes the air intake passage. The shaft 144 is also connected to a return mechanism, which can drive the shaft 144 to rotate and return in the other direction. After returning, the door plate 143 opens the air intake passage.

[0071] like Figure 4-Figure 7 As shown, specifically, the first driving mechanism 142 includes a paddle 1421, which is fixedly connected to one end of a shaft 144 that passes through the side wall of the intake injection pipe 14, and the intake injection pipe 14 is rotatably provided with a first transmission sprocket, and the first transmission sprocket is connected to a first chain 1426, and a plurality of evenly distributed protrusion structures 1427 are fixedly provided on the first chain 1426, and the protrusion structure 1427 can drive the paddle 1421 to rotate a certain angle in one direction, and when the protrusion structure 1427 no longer paddles the paddle 1421, the paddle 1421 is driven to reset by the return mechanism, and the first chain 1426 is connected to the first active sprocket 147, and the first active sprocket 147 is connected to the first driving motor 146.

[0072] The protrusion structure 1427 is a cylindrical protrusion or a sheet-like protrusion structure; the return mechanism uses a return torsion spring (not marked in the drawings), which is arranged between the shaft rod 144 and the side wall of the intake injection pipe 14. When the protrusion structure 1427 moves the paddle 1421, the return torsion spring is compressed and deformed. When the protrusion structure 1427 no longer moves the paddle 1421, the rebound force of the return torsion spring drives the shaft rod 144 to return to its original position.

[0073] In order to ensure the transmission stability of the first chain 1426 and the stability of the return of the paddle 1421 , a plurality of first limiting mechanisms and second limiting mechanisms are arranged outside the intake injection pipe 14 , and the first limiting mechanisms and the second limiting mechanisms are arranged corresponding to the paddle 1421 .

[0074] The first limiting mechanism includes two bending plates 1422 fixedly connected to the outside of the intake injection pipe 14. The two bending plates 1422 are arranged opposite to each other and there is a gap between them. The first chain 1426 can just slide and be connected between the two bending plates 1422. The two bending plates 1422 can ensure the stability of the first chain 1426 when moving.

[0075] The second limiting mechanism includes a support plate 1423, on which a limiting column 1424 is detachably installed. The limiting column 1424 is arranged close to the lower end of the paddle 1421. The limiting column 1424 can limit the return range of the paddle 1421 to avoid excessive rebound force of the return torsion spring, which causes the paddle 1421 to rotate too much. At the same time, the rotation angle of the paddle 1421 is limited so that the door panel 143 reaches the set opening range; the support plate 1423 is provided with a scale line 1425, and the position of the scale line 1425 can provide calibration for the installation position of the limiting column 1424 and the rotation range of the paddle 1421, so that the staff can observe and set the angle of the paddle 1421 from the outside, thereby setting the opening range of the door panel 143 to the air intake channel.

[0076] There are many structures that can be used to install the limit column 1424. The first structure is: Figure 6 As shown, a plurality of connection holes 1428 are provided on the support plate 1423, and the limiting posts 1424 are tightly inserted into the connection holes 1428; the second structural form is: Figure 7 As shown, an arc-shaped connecting groove 1429 is opened on the supporting plate 1423, and the limiting column 1424 is slidably installed in the connecting groove 1429, and the position of the limiting column 1424 can be fixed by bolts.

[0077] like Figure 2 As shown, a first protection plate 18 is disposed outside the intake injection pipe 14 , and the first protection plate 18 is disposed outside the first driving mechanism 142 to protect it.

[0078] like Figure 8-Figure 10As shown, the top of the feed bin 11 is the entrance, and the bottom is the exit. A feed mechanism is arranged in the feed bin 11, and the feed mechanism includes a feed plate 114 and two feed rollers 115. The outer surface of the feed roller 115 is fixedly provided with a plurality of feed partition plates 1151 evenly distributed around the center of a circle. The feed roller 115 is connected to a second driving mechanism, and the second driving mechanism drives the two feed rollers 115 to rotate. A feed plate 114 is arranged on the upper part of the two feed rollers 115. The feed plate 114 is an inverted V-shaped structure. The entrance of the feed bin 11 is located directly above the feed plate 114. The feed plate 114 is located at the upper position of the gap between the two feed rollers 115, and can cover part of the structure of the two feed rollers 115 in the vertical direction. A guide channel is formed between the feed plate 114 and the side wall of the feed bin 11, which guides the grains to the upper part of the feed roller 115, so that the grains fall between some feed partition plates 1151 of the feed roller 115. When the feed roller 115 rotates, this part of the grains can be driven to the lower part and fall from the outlet. In the above structure, the design of the feed roller 115 can achieve quantitative and uniform feeding. The feeding speed and feed amount can be controlled by controlling the rotation speed and rotation time of the feed roller 115.

[0079] The second driving mechanism includes a second transmission sprocket 112, the central axes of the two feed rollers 115 are respectively rotatably connected to the side walls of the feed bin 11, and one end of the central axis passes through the side wall of the feed bin 11 and is fixedly connected to the second transmission sprocket 112, the second transmission sprocket 112 is connected to the second chain, the second chain is connected to the second driving sprocket 111, the second driving sprocket 111 is connected to the second driving motor 113, and the second driving motor 113 is fixedly connected to one side of the feed bin 11.

[0080] like Figure 2 As shown, a second protective plate 17 is disposed outside the feed bin 11 , and the second protective plate 17 is disposed outside the second transmission sprocket 112 and the second driving sprocket 111 to protect them.

[0081] like Figure 3-Figure 5 As shown, the discharge end of the air intake injection pipe 14 is connected to a discharge bin 19, the top and bottom of the discharge bin 19 are both open, the top opening of the discharge bin 19 is connected to the drying chamber 12, and is used to receive the grains after drying. A baffle plate 191 is arranged on the upper portion of the discharge bin 19, and the baffle plate 191 can close the upper opening of the discharge bin 19, and the baffle plate 191 is connected to a rotating shaft, and both ends of the rotating shaft are respectively rotatably connected to the discharge bin 19, and one end of the rotating shaft is connected to a motor, and the motor drives the rotating shaft to rotate, thereby driving the baffle plate 191 to rotate, thereby realizing the opening and closing of the upper opening of the discharge bin 19.

[0082] In the above structure, the setting of the baffle plate 191 can close the upper opening of the discharge bin 19 to prevent grains from falling directly into the discharge bin 19, thereby extending the contact time between the grains and the hot air in the drying chamber 12, making full use of the heat of the hot air, and improving the grain drying efficiency and drying effect.

[0083] The bottom of the discharge bin 19 is opened for discharging materials, and a conveyor or an elevator can be arranged at the lower part of the discharge bin 19 to transport the dried grains.

[0084] A mesh plate 141 is disposed on the upper portion of the air intake injection pipe 14 to prevent grains from falling into the air intake injection pipe 14 .

[0085] The lower part of the air intake injection pipe 14 is respectively connected to a plurality of air blowing devices through a plurality of branch pipes 16, the air blowing devices are connected to a control valve, and the air blowing devices are connected to a hot air pipe, and the hot air comes from a fin heat exchanger.

[0086] The branch pipe 16 and the exhaust pipe 13 are both provided with temperature detection sensors for detecting the inlet air temperature and the outlet air temperature, so as to monitor the internal drying conditions.

[0087] like Fig.11 , Fig.12 As shown, a material level detection mechanism 116 may also be connected to the top of the feed bin 11, and the material level detection mechanism 116 includes a fixed rod 1161, which is fixedly connected to the top wall of the feed bin 11, and the lower part of the fixed rod 1161 is fixedly connected to a fixed plate 1162, on which a detection switch is arranged, and the fixed plate 1162 is rotatably connected to a baffle 1163, and the detection switch is arranged on a side of the fixed plate 1162 close to the baffle 1163, and a rebound structure is arranged between the baffle 1163 and the fixed plate 1162, and the rebound structure may select a spring structure.

[0088] In the above structure, the fixed rod 1161 is fixedly connected to the top wall of the feed bin 11 to detect whether the grain has reached the height where the material level detection mechanism 116 is located. Under normal circumstances, the spring structure supports the baffle 1163 so that the baffle 1163 is tilted relative to the fixed plate 1162. When the grain reaches the height where the material level detection mechanism 116 is located, the grain gradually accumulates and presses the baffle 1163. The baffle 1163 rotates relative to the fixed plate 1162 and approaches the fixed plate 1162 until the detection switch is triggered. The detection switch detects the baffle 1163, which means that the material level has reached the height of the mechanism. At this time, the detection switch sends a feedback signal to stop feeding.

[0089] The drying chamber 12 and the feed bin 11 are provided with a plurality of observation windows, and the drying chamber 12 is provided with a searchlight to facilitate the staff to observe the internal working conditions.

[0090] like Figure 1 , Figure 2 As shown, the air intake injection pipe 14 and the drying chamber 12 are both supported by a bracket 15 .

[0091] The specific structure of the grain slow tower 2 includes a tower body 21, a feed inlet 211 is arranged at the top of the tower body 21, a discharge port 215 is arranged at the bottom of the tower body 21, and the tower body 21 is a hollow rectangular tower structure. The tower body 21 is sequentially provided with a grid section 212, a ventilation section 213, and a discharge section 214 from top to bottom. The tower body 21 is provided with a plurality of observation windows for convenient observation of the internal situation.

[0092] like Fig.13 , Fig.14 , Fig.17 , Fig.18 As shown, the tower body 21 is provided with a ventilation section 213, and the ventilation section 213 can be provided with multiple levels arranged in sequence from top to bottom. The tower body 21 of the ventilation section 213 is provided with ventilation holes 2131, and the ventilation holes 2131 are respectively provided on the first side wall 2133 and the second side wall 2134 parallel to the tower body 21, and the ventilation holes 2131 are arranged in rows, and several rows of ventilation holes 2131 on the first side wall 2133 and several rows of ventilation holes 2131 on the second side wall 2134 are arranged crosswise to form a tortuous ventilation channel, and the ventilation holes 2131 on the first side wall 2133 and the second side wall 2134 are respectively fixedly connected with shielding plates 2132, and the shielding plates 2132 are plates with an inverted V-shaped structure, and two adjacent rows of shielding plates 2132 are staggered in the vertical direction to provide an S-shaped curved flow channel for the falling grains. In the above structure, the ventilation holes 2131 and the shielding plate 2132 can reserve ventilation and heat dissipation space for the grains in the ventilation section 213 of the tower body 21, so that the interior of the tower body 21 can be connected with the external air to dissipate the heat. In addition, the grains fall in an S-shaped tortuous manner and are relatively loose as a whole, which is convenient for heat dissipation.

[0093] In order to accelerate the ventilation efficiency, the first side wall 2133 is externally connected with an air guide cover 23, one end of the air guide cover 23 is connected with all the ventilation holes 2131 on the first side wall 2133, and the other end of the air guide cover 23 is connected with an air guide pipe 24, which is used to connect with an external fan to accelerate air circulation, thereby improving heat dissipation efficiency. In addition, a dust removal device can be set between the air guide pipe 24 and the fan to remove impurities.

[0094] like Fig.13 , Fig.14 As shown, a plurality of louver boards are connected to the second side wall 2134 , each louver board is correspondingly arranged at the upper part of a row of ventilation holes 2131 , and the louver board has a shielding and protective function.

[0095] like Fig.13 , Fig.14 , Fig.16As shown, the tower body 21 is provided with a grid section 212, and the grid section 212 can be provided with multiple levels arranged in sequence from top to bottom. The grid section 212 is provided at the upper part of the ventilation section 213 and the lower part of the feed port 211, and a horizontally arranged grid mesh structure 2121 is provided inside the grid section 212. The grid mesh structure 2121 is a rectangular mesh structure that is cross-sectional and crisscrossed.

[0096] like Fig.13 , Fig.14 , Figure 19-21 As shown, the tower body 21 is provided with a discharge section 214, which is arranged at the lower part of the ventilation section 213 and at the upper part of the discharge port 215. The discharge section 214 includes multiple groups of discharge mechanisms, which are arranged side by side on the same horizontal line. Each group of the discharge mechanisms includes two discharge rollers 2145, a discharge plate 2146 and two guide plates 2144. The outer surface of the discharge roller 2145 is fixedly provided with multiple discharge partition plates 21451 evenly distributed around the center of the circle. The discharge partition plates 21451 are arranged along the radial direction of the discharge roller 2145. The adjacent discharge partition plates 21451 are used to receive grains. The discharge roller 2145 is connected to a driving mechanism, and the driving mechanism drives the discharge roller 2145 to rotate, so that the grains received between the adjacent discharge partition plates 21451 are rotated to the lower end for discharge. A discharge plate 2146 is provided on the upper part of the two discharge rollers 2145. The discharge plate 2146 is an inverted V-shaped structure. The discharge plate 2146 is located in the upper position of the gap between the two discharge rollers 2145 and can cover part of the structure of the two discharge rollers 2145 in the vertical direction. The two guide plates 2144 are respectively located in the upper position of the two discharge rollers 2145 in the vertical direction to ensure that the grains fall on the receiving side of the discharge roller 2145. The discharge plate 2146 and the two guide plates 2144 form a guide channel to guide the grains to the upper receiving side of the discharge roller 2145, so that the grains fall between some discharge partition plates 21451 of the discharge roller 2145. When the discharge roller 2145 rotates, this part of the grains can be driven to the bottom and fall from the discharge port 215. In the above structure, the design of the discharge roller 2145 can achieve quantitative and uniform discharge. The discharge speed and discharge amount can be controlled by controlling the rotation speed and rotation time of the discharge roller 2145.

[0097] Specifically, the driving mechanism includes a transmission sprocket 2143, the central axes of the two discharge rollers 2145 are respectively connected to the tower body 21 for rotation, and one end of the central axis passes through the tower body 21 and is fixedly connected to the transmission sprocket 2143, the transmission sprocket 2143 is connected to a chain (not shown in the drawings), the chain is connected to a driving sprocket 2142, and the driving sprocket 2142 is connected to a driving motor 2141. Multiple groups of discharge mechanisms are connected to the same chain. Fig.14As shown, a protective plate 25 is provided outside the discharge section 214, and the protective plate 25 is used to shield and protect the driving mechanism.

[0098] The guide plate 2144 is inclined relative to the vertical direction. The guide plate 2144 is provided with at least two levels arranged up and down and connected to each other, and the inclination directions of the two adjacent levels of guide plates 2144 are opposite. Both ends of the guide plate 2144 and the discharge plate 2146 are fixedly connected to the tower body 21.

[0099] like Figure 13-Figure 16 As shown, the feed port 211 at the top of the tower body 21 is provided with a mounting plate 2111 , the mounting plate 2111 is fixedly arranged at the middle position of the feed port 211 , and a material level detection mechanism 116 is arranged on the mounting plate 2111 .

[0100] A plurality of rotary level sensors are arranged inside the tower body 21 . The plurality of rotary level sensors are arranged at different heights of the tower body 21 to detect whether there are grains at different heights.

[0101] The discharge port 215 at the bottom of the tower body 21 is a conical structure, and a moisture meter is arranged in the discharge port 215 to detect whether the humidity meets the standard. A flow scale can be arranged in the discharge port 215 according to the demand. A conveyor can be arranged at the lower part of the discharge port 215 to transport the cooled grains.

[0102] A support frame 22 is disposed at the bottom of the tower body 21 . The support frame 22 is provided with four legs for supporting the tower body 21 .

[0103] The drying process of the continuous grain high temperature fluidized drying system is:

[0104] 1) The grains are transported to the input end of the first elevator by the conveying mechanism, and are lifted and transported to the inlet end of the feed bin 11 of the drying fluidized bed 1 by the first elevator, and enter the drying chamber 12 from the feed bin 11;

[0105] 2) The hot air ejected from the air inlet injection pipe 14 in the drying fluidized bed 1 performs pulse spray drying on the grains entering the drying chamber 12, and drives the grains to gradually move toward the discharge bin 19. The grains eventually flow out of the drying fluidized bed 1 from the bottom outlet of the discharge bin 19. The wet air and grain impurities after the grains are dried in the drying chamber 12 are discharged from the exhaust pipe 13;

[0106] 3) The grains flowing out of the discharge bin 19 of the drying fluidized bed 1 fall on the input end of the second elevator, and the second elevator transports the grains to the top of the slow tower 2, where the grains flow downward and gradually cool down;

[0107] 4) Finally, the grains flow out from the discharge port 215 at the bottom of the slow tower 2, fall on the input end of the conveyor, and are sent to the silo by the conveyor.

Claims

1. A continuous high-temperature fluidized drying system for grains, characterized in that: It comprises a first elevator, a drying fluidized bed (1), a second elevator, a slow tower (2), and a conveyor which are arranged in sequence; The drying fluidized bed (1) comprises a drying chamber (12), the bottom of the drying chamber (12) is connected to an air inlet injection pipe (14), the upper part of the drying chamber (12) is respectively connected to a feed bin (11) and an exhaust pipe (13), the output end of a first elevator is arranged at the inlet end of the feed bin (11), the discharge end of the air inlet injection pipe (14) is connected to a discharge bin (19), the top and bottom of the discharge bin (19) are both open, the top opening of the discharge bin (19) is in communication with the drying chamber (12), and the bottom opening of the discharge bin (19) is arranged at the input end of a second elevator; The slow tower (2) comprises a tower body (21), a feed port (211) is arranged at the top of the tower body (21), a discharge port (215) is arranged at the bottom of the tower body (21), the output end of the second elevator is arranged at the feed port (211) of the tower body (21), and the discharge port (215) of the tower body (21) is arranged at the input end of the conveyor; The air inlet injection pipe (14) of the drying fluidized bed (1) is divided into a plurality of air inlet channels by a plurality of partitions (145), the air inlet directions of the air inlet channels are arranged at an angle, and each air inlet channel is provided with a damper mechanism capable of controlling the intermittent opening and closing of the air inlet channels; The damper mechanism comprises a door plate (143), the door plate (143) being fixedly connected to a shaft (144), both ends of the shaft (144) being rotatably connected to the side walls of the air intake injection pipe (14), one end of the shaft (144) passing through the side wall of the air intake injection pipe (14) and then connected to a first driving mechanism (142), the first driving mechanism (142) being capable of intermittently driving the shaft (144) to rotate in one direction, the shaft (144) being further connected to a return mechanism, the return mechanism being capable of driving the shaft (144) to rotate and return in another direction; The first driving mechanism (142) comprises a paddle (1421), the paddle (1421) being fixedly connected to one end of a shaft (144) penetrating a side wall of an intake injection pipe (14), the intake injection pipe (14) being rotatably provided with at least one first transmission sprocket, the first transmission sprocket being connected to a first chain (1426), a plurality of evenly distributed protrusion structures (1427) being fixedly provided on the first chain (1426), the protrusion structures (1427) being capable of driving the paddle (1421) to rotate in one direction, the first chain (1426) being connected to a first driving sprocket (147), and the first driving sprocket (147) being connected to a first driving motor (146); The protrusion structure (1427) is a cylindrical protrusion or a sheet-like protrusion structure; The return mechanism uses a return torsion spring, which is arranged between the shaft (144) and the side wall of the intake injection pipe (14); The air intake injection pipe (14) is provided with a plurality of groups of first limiting mechanisms and second limiting mechanisms on the outside. The first limiting mechanisms and the second limiting mechanisms are both provided corresponding to the paddle (1421). The first limiting mechanism comprises two bending plates (1422) fixedly connected to the outside of the air intake injection pipe (14). The two bending plates (1422) are arranged opposite to each other and there is a gap between them. The first chain (1426) can just slide and be engaged between the two bending plates (1422). The second limiting mechanism comprises a support plate (1423). A limiting column (1424) is detachably mounted on the support plate (1423). The limiting column (1424) is provided close to the lower end of the paddle (1421). A scale line (1425) is provided on the support plate (1423).

2. The continuous high-temperature fluidized drying system for grains according to claim 1, characterized in that: The top of the feed bin (11) is an entrance, and the bottom is an exit. A feed mechanism is arranged in the feed bin (11), and the feed mechanism comprises a feed plate (114) and two feed rollers (115). A plurality of feed partition plates (1151) evenly distributed around the center of a circle are fixedly arranged on the outer surface of the feed roller (115). The feed roller (115) is connected to a second driving mechanism. A feed plate (114) is arranged on the upper part of the two feed rollers (115). The feed plate (114) is an inverted V-shaped structure. The entrance of the feed bin (11) is located directly above the feed plate (114). The feed plate (114) is located at the upper part of the gap between the two feed rollers (115), and can cover part of the structure of the two feed rollers (115) in the vertical direction. The second driving mechanism comprises a second transmission sprocket (112), the central axes of the two feed roller shafts (115) are respectively rotatably connected to the side walls of the feed bin (11), and one end of the central axis passes through the side wall of the feed bin (11) and is fixedly connected to the second transmission sprocket (112), the second transmission sprocket (112) is connected to a second chain, the second chain is connected to a second driving sprocket (111), and the second driving sprocket (111) is connected to a second driving motor (113); An inlet flow scale and an inlet moisture detector are arranged at the top of the feed bin (11).

3. The continuous high-temperature fluidized drying system for grains according to claim 1, characterized in that: A mesh plate (141) is provided at the upper portion of the air intake injection pipeline (14), and a plurality of air blowing devices are respectively connected to the lower portion of the air intake injection pipeline (14) via a plurality of branch pipelines (16), the air blowing devices are connected to a control valve, and temperature detection sensors are provided in the branch pipelines (16) and the exhaust pipeline (13).

4. The continuous high-temperature fluidized drying system for grains according to claim 1, characterized in that: The tower body (21) of the slow tower (2) is provided with a ventilation section (213), and the tower body (21) of the ventilation section (213) is provided with ventilation holes (2131), and the ventilation holes (2131) are respectively provided on a first side wall (2133) and a second side wall (2134) parallel to the tower body (21), and the ventilation holes (2131) are arranged in rows, and a plurality of rows of ventilation holes (2131) on the first side wall (2133) and a plurality of rows of ventilation holes (2131) on the second side wall (2134) are arranged crosswise, and the ventilation holes (2131) on the first side wall (2133) and the second side wall (2134) are respectively fixedly connected with shielding plates (2132), and the shielding plates (2132) are of an inverted V-shaped structure, and two adjacent rows of shielding plates (2132) are arranged staggered in the vertical direction; The first side wall (2133) is externally connected to an air guide cover (23); one end of the air guide cover (23) is in communication with all ventilation holes (2131) on the first side wall (2133); and the other end of the air guide cover (23) is connected to an air guide pipe (24); A plurality of louver plates are connected to the second side wall (2134), and each louver plate is arranged correspondingly on the upper part of a row of ventilation holes (2131).

5. The continuous high-temperature fluidized drying system for grains according to claim 4, characterized in that: The tower body (21) is provided with a grille section (212), the grille section (212) is arranged on the upper part of the ventilation section (213), and a horizontally arranged grille mesh structure (2121) is arranged inside the grille section (212).

6. The continuous high-temperature fluidized drying system for grains according to claim 4, characterized in that: The tower body (21) is provided with a discharge section (214), the discharge section (214) being arranged at the lower part of the ventilation section (213), the discharge section (214) comprising a plurality of discharge mechanisms, the discharge mechanisms comprising two discharge rollers (2145), a discharge plate (2146) and two guide plates (2144), a plurality of discharge partition plates (21451) evenly distributed around the center of a circle being fixedly arranged on the outer surface of the discharge roller (2145), the discharge roller (2145) A drive mechanism is connected, a discharge plate (2146) is arranged on the upper part of the two discharge rollers (2145), the discharge plate (2146) is an inverted V-shaped structure, the discharge plate (2146) is located at the upper part of the gap between the two discharge rollers (2145), and can cover part of the structure of the two discharge rollers (2145) in the vertical direction, and the two guide plates (2144) are respectively located at the upper part of the two discharge rollers (2145) in the vertical direction; The driving mechanism comprises a transmission sprocket (2143), the central axes of the two discharge roller shafts (2145) are respectively rotatably connected to the tower body (21), and one end of the central axis passes through the tower body (21) and is fixedly connected to the transmission sprocket (2143), the transmission sprocket (2143) is connected to a chain, the chain is connected to a driving sprocket (2142), and the driving sprocket (2142) is connected to a driving motor (2141); The guide plates (2144) are arranged to be inclined relative to the vertical direction. The guide plates (2144) are arranged in at least two stages, and the inclination directions of the guide plates (2144) at two adjacent stages are opposite. Both ends of the guide plates (2144) and the discharge plates (2146) are fixedly connected to the tower body (21).

7. The continuous high-temperature fluidized drying system for grains according to claim 4, characterized in that: The feed inlet (211) at the top of the tower body (21) is provided with a mounting plate (2111), and a material level detection mechanism is provided on the mounting plate (2111). A plurality of rotary level control devices are provided inside the tower body (21), and the plurality of rotary level control devices are respectively provided at different heights of the tower body (21). The discharge port (215) at the bottom of the tower body (21) is a conical structure, and a moisture meter and an outlet flow scale are provided inside the discharge port (215).

8. The continuous high-temperature fluidized drying system for grains according to claim 1, characterized in that: The drying process is: 1) The grains are transported by a conveying mechanism to the input end of a first elevator, are lifted by the first elevator and transported to the inlet end of a feed bin (11) of a drying fluidized bed (1), and enter a drying chamber (12) from the feed bin (11); 2) The hot air ejected from the air inlet injection pipe (14) in the drying fluidized bed (1) performs pulse spray drying on the grains entering the drying chamber (12), and drives the grains to gradually move toward the discharge bin (19). The grains eventually flow out of the drying fluidized bed (1) from the bottom outlet of the discharge bin (19). The wet air and grain impurities after the grains are dried in the drying chamber (12) are discharged from the exhaust pipe (13); 3) The grains flowing out of the discharge bin (19) of the drying fluidized bed (1) fall onto the input end of the second elevator, and the second elevator transports the grains to the top of the slow tower (2), where the grains flow downward and gradually cool down; 4) Finally, the grains flow out from the discharge port (215) at the bottom of the slow tower (2), fall on the input end of the conveyor, and are sent to the silo by the conveyor.

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