A biomass fuel based grain dryer

Abstract

The present application provides a kind of biomass fuel-based grain dryer, including main box, hot blast furnace is installed in the inside top of main box, fuel supply bin is symmetrically extended into the two sides of hot blast furnace, grain outlet pipe is equipped at the inside bottom of main box, discharge chute is opened at the position of the outer wall of main box and grain outlet pipe, grain air-drying assembly is installed at the top of grain outlet pipe;Fuel supply bin is open structure at both ends, the inner end of fuel supply bin is communicated with fuel supply bin, second fan is installed at the outer end of fuel supply bin, pusher assembly is slidably installed in the inside of fuel supply bin.The grain injected by grain injection inlet can pass through second fan, the rice hull and straw in grain are blown out by second fan, the blown-out rice hull and straw are gathered in the inner end of the inside of fuel supply bin, and so on, so that impurity screening for grain can be realized, and biomass raw materials in grain can be recycled during discharging process.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of grain drying based on biomass fuel, and particularly relates to a grain dryer based on biomass fuel. BACKGROUND

[0002] The grain dryer is a device for drying grains such as rice, wheat, corn, etc. It is usually composed of a machine and a hot air system. The grains usually contain a high moisture content after harvesting, and if not dried in time, they are prone to mold, deterioration or infestation by pests. The grain dryer transmits hot air into the grains to make them lose moisture, thereby achieving the purpose of drying. The working principle of the grain dryer is usually as follows: first, heat energy is generated by burning fuel or using electricity, and then the hot air is sent into the dryer by a fan.

[0003] The traditional grain dryer relies on electricity, and the entire device consumes a large amount of energy and lacks environmental protection. In addition, the grain dryer is usually equipped with a winnowing part, and most of the blown rice hulls and straws are directly discarded, and these biomass materials are not fully utilized.

[0004] Therefore, there is a need for a grain dryer based on biomass fuel. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application provides a grain dryer based on biomass fuel, which solves the problems mentioned in the background art.

[0006] To achieve the above purpose, the present application is realized by the following technical scheme:

[0007] A grain dryer based on biomass fuel, comprising a main box body, a hot air furnace is installed at the top of the inside of the main box body, fuel supply bins are symmetrically extended into the two sides of the hot air furnace, a grain discharge pipe is arranged at the bottom of the inside of the main box body, a discharge slot is arranged at the position opposite to the grain discharge pipe on the outer wall of the main box body, a grain air-drying assembly is installed at the top of the grain discharge pipe, the air inlet of the grain air-drying assembly is communicated with the hot air furnace, and the grain outlet is communicated with the discharge slot; a group of closed grain guide bins are arranged at the bottom of each fuel supply bin, a first grain outlet is arranged on the side of the grain guide bin, a second grain outlet is arranged at the position opposite to the first grain outlet on the main box body, and the second grain outlet is communicated with the grain air-drying assembly.

[0008] Both ends of the fuel supply bin are open structures, the inner end of the fuel supply bin is communicated with the hot blast furnace, the outer end of the fuel supply bin is provided with a second fan, the air outlet of the second fan is located at the inner bottom of the fuel supply bin, and the air outlet of the second fan faces the hot blast furnace; a grain feeding inlet is formed on the top surface of the fuel supply bin, and a discharging hole is formed on the bottom surface of the fuel supply bin; the grain feeding inlet, the discharging hole and the grain guide bin are arranged in sequence from top to bottom,

[0009] A pushing assembly is slidably installed in the fuel supply bin, the pushing assembly comprises a pushing block and a translation driving assembly, the translation driving assembly is arranged on the side of the fuel supply bin, the pushing block is of a vertical telescopic structure, and the side of the pushing block is connected with the translation driving assembly;

[0010] The pushing assembly comprises the following states:

[0011] In the first state, the pushing block is in an elongated state, and the pushing block is located at the inner end of the fuel supply bin to block the two sides of the hot blast furnace, so that the hot blast furnace is in a closed combustion state;

[0012] In the second state, the pushing block remains at the position of the first state, and the grain fed through the grain feeding inlet is blown by the second fan to the outlet end of the fuel supply bin during the falling process;

[0013] In the third state, the pushing block is changed to a retracted state, and the translation driving assembly drives the pushing block to move outward to the first fan and the grain feeding inlet;

[0014] In the fourth state, the pushing block is changed to an elongated state, the biomass particles are added to the inner end of the fuel supply bin through the feeding groove, and the translation driving assembly drives the pushing block to move inward to push the chaff, straw and biomass particles in the fuel supply bin into the hot blast furnace.

[0015] Further, the pushing block comprises an upper block, a lower block and a first driving rod, the side wall of the upper block is connected with the translation driving assembly, the bottom surface of the upper block is provided with a containing groove, the first driving rod is installed in the upper block, the bottom end of the first driving rod is provided with the lower block, the lower block is received in the containing groove when the pushing block is in the retracted state, the lower block is extended out of the upper block when the pushing block is in the elongated state, the lower block and the lower block have an overlapping portion, and the bottom surface of the lower block is slidably attached to the inner bottom surface of the fuel supply bin.

[0016] Further, the hot blast stove comprises an outer stove body, an inner stove body, an ash discharge pipe and an air outlet cavity, the upper and lower surfaces of the outer stove body are closed structures, the top of the inner stove body is an open structure and the bottom is a closed structure, the outer stove body is fixed at the middle line inside the main box body, the inner stove body is concentrically and spacedly arranged inside the outer stove body, the area between the inner stove body and the outer stove body is the air outlet cavity, there is a gap between the top of the inner stove body and the inner top surface of the outer stove body, the inner bottom of the inner stove body is provided with a grid plate and an air outlet head, the grid plate is arranged on the top of the air outlet head, the bottom of the air outlet head is connected to the first fan through a conduit, and the first fan is arranged on the outer wall of the main box body; the bottom surface of the inner stove body is symmetrically provided with an inclined downward extending ash discharge pipe, the ash discharge pipe penetrates the bottom surface of the outer stove body in a sealed manner; the inner end of the fuel supply bin penetrates the outer stove body in a sealed manner and extends into the inner stove body in alignment.

[0017] Further, the grain air-drying assembly comprises a grain fence assembly, which comprises a rectangular tube body, a side material guide cover, an upper shell and a second driving rod, the rectangular tube body is vertically distributed, the top and bottom of the rectangular tube body are open structures, the bottom end of the rectangular tube body slides into the grain discharge pipe, the two sides of the rectangular tube body are symmetrically provided with an inclined upward extending side material guide cover, the top end of the rectangular tube body is vertically provided with an upper shell, the top surface of the upper shell is vertically provided with a second driving rod at the center, the second driving rod is installed at the center of the bottom surface of the outer stove body, the inner wall of the main box body is provided with a baffle for stopping the side material guide cover, and the second driving rod is used to drive the grain fence assembly to float and move up and down.

[0018] Further, the end of the side material guide cover is in a U-shaped cross section, and the upper shell is in an inverted U-shaped structure.

[0019] Further, the air guide pipe and the partition plate are provided with a through slot in the inner part of the upper shell, the first air guide pipe penetrates the through slot in a sealed manner, the top end of the first air guide pipe is connected to the bottom of the air outlet cavity, the bottom end of the first air guide pipe is vertically connected to the shunt pipe, the two ends of the shunt pipe are symmetrically connected to the second air guide pipe extending upward, the bottom surface of the second air guide pipe is provided with an air outlet mesh structure, the second air guide pipe is arranged above the side material guide cover in a relatively parallel manner, and the connection part of the second air guide pipe and the shunt pipe is vertically provided with a partition plate extending downward.

[0020] Further, the grain air-drying assembly comprises the following working steps:

[0021] S1, the second driving rod drives the grain fence assembly to be in a retracted state, the bottom end of the partition plate abuts against the side material guide cover, and the second air guide pipe, the partition plate, the side material guide cover and the inner wall of the main box body form a grain closed cavity;

[0022] S2, the grain discharged from the grain material guide bin passes through the first grain outlet and the second grain outlet and enters the grain closed cavity;

[0023] S3, the hot air generated by the inner furnace body is output to the grain closed cavity through the first air guide pipe, the flow divider and the second air guide pipe to dry the grain; the hot air enters the grain guide bin in reverse after passing through the grain closed cavity to pre-dry the falling grain;

[0024] S4, the second driving rod drives the grain baffle assembly to move downward, the upper shell slides downward along the first air guide pipe until the bottom surface of the side guide cover is stopped by the baffle, a grain discharge gap is formed between the side guide cover and the partition plate, and the S3 dried grain passes through the grain discharge gap and is discharged to the grain discharge pipe.

[0025] Further, the outlet end of the ash discharge pipe is communicated with an ash collecting assembly, the ash collecting assembly comprises an outer cylinder and an inner cylinder; a first ash discharge port is formed in the side wall of the outer cylinder, the first ash discharge port is communicated with the ash discharge pipe, the inner cylinder is rotatably installed in the inner part of the outer cylinder, a second ash discharge port is formed in the inner part of the inner cylinder, a connecting block is arranged on the outer wall of the inner cylinder, a guide groove is formed in the inner part of the outer cylinder for the connecting block to slide through, an arc-shaped tooth ring is arranged at the outer end of the connecting block, and the tooth ring is connected with a switching assembly;

[0026] In S1-S3, the inner cylinder closes the first ash discharge port from the inside, so that the ash discharge pipe remains in a closed state, and heat in the inner furnace body is prevented from being dissipated;

[0027] In S4, when the upper shell moves downward, the switching assembly drives the tooth ring to rotate, the tooth ring drives the inner cylinder in the inner part to rotate clockwise, the connecting block moves along the guide groove, and the second ash discharge port moves to the inner side of the first ash discharge port, so that the ash in the inner furnace body passes through the ash discharge pipe, the first ash discharge port and the second ash discharge port to enter the inner cylinder.

[0028] Further, the switching assembly comprises a tooth plate and a switching gear, the tooth plate is vertically symmetrical arranged on the top surface of the upper shell, the switching gear is meshed and installed between the tooth plate and the tooth ring, and the switching gear is rotatably installed on the inner wall of the main box.

[0029] The application provides a grain dryer based on biomass fuel.

[0030] 1. The grain injected through the grain injection port can pass through the second fan, the second fan blows out the rice hulls and straws in the grain, and the blown-out rice hulls and straws are gathered in the inner end of the fuel supply bin, so that impurity selection of the grain can be realized, and the biomass raw material in the grain can be recycled during the discharging process.

[0031] 2. The pushing block is designed as a telescopic structure, and the following effects can be achieved: 2.1. During the grain discharging and drying, the pushing block blocks the outlet end of the fuel supply bin, so that the heat in the hot blast furnace is prevented from being dissipated, and the heat preservation effect is achieved, and meanwhile, the rice hulls and straws blown out of the grain are stopped and gathered by the pushing block; 2.2. When the fuel needs to be supplemented, the pushing block is retracted and moves backward, so that the pushing block avoids the rice hulls and straws and avoids pushing the sundries, when the pushing block moves to the outer end, the pushing block is extended again and then moves inward, so that the pushing block pushes the rice hulls, straws and biomass particles into the hot blast furnace together, the automatic fuel supplement is realized, the rice hulls and straws can be used as the supplement fuel, and the rice hulls and straws can be quickly reused after being collected. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0033] Figure 1 A side view structure schematic diagram of the grain dryer based on the biomass fuel is shown;

[0034] Figure 2 Another side view structure schematic diagram of the grain dryer is shown;

[0035] Figure 3 An internal structure schematic diagram of the grain dryer is shown;

[0036] Figure 4 An enlarged structure schematic diagram of A in Figure 3

[0037] Figure 5 A wind guide assembly schematic diagram of the present application is shown;

[0038] Figure 6 A hot blast furnace and grain fence assembly connection structure schematic diagram of the present application is shown;

[0039] Figure 7 A closed state structure schematic diagram of the ash removal assembly of the present application is shown;

[0040] Figure 8 An open state structure schematic diagram of the ash removal assembly of the present application is shown;

[0041] Figure 9 An internal structure schematic diagram of the hot blast furnace of the present application is shown;

[0042] Figure 10 ​The inner furnace body and ash discharge pipe layout structure of the application is shown in the schematic diagram.

[0043] Figure 11 The grain drying output state structure schematic diagram of the application is shown in the schematic diagram.

[0044] Figure 12 The push block plugging state structure schematic diagram of the application is shown in the schematic diagram.

[0045] Figure 13 The push block contraction state structure schematic diagram of the application is shown in the schematic diagram.

[0046] The schematic diagram is shown in the figure:

[0047] 1, main box body, 11, feeding groove, 12, discharging groove, 13, second grain output port, 14, baffle, 15, first fan, 2, fuel supply bin, 21, grain inlet, 22, second fan, 23, discharging hole, 3, push assembly, 31, push block, 311, upper block body, 3111, containing groove, 312, lower block body, 313, first driving rod, 32, translation driving assembly, 321, motor, 322, fixed plate, 323, screw rod, 4, grain guide bin, 41, first grain output port, 5, grain baffle assembly, 51, rectangular tube body, 52, side guide cover, 53, upper shell, 531, through groove, 54, second driving rod, 6, air guide assembly, 61, first air guide pipe, 62, shunt pipe, 63, second air guide pipe, 64, partition plate, 71, outer furnace body, 72, inner furnace body, 73, ash discharge pipe, 74, air outlet cavity, 75, grid plate, 76, air outlet head, 8, ash collecting assembly, 81, outer cylinder, 811, first ash discharge port, 812, guide groove, 82, inner cylinder, 821, connecting block, 822, second ash discharge port, 83, gear ring, 9, adapter assembly, 91, gear plate, 92, adapter gear, 9a, grain guide pipe. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical scheme and advantages of the embodiments of the application more clear, the technical scheme in the embodiments of the application is described clearly and completely. Obviously, the described embodiments are part of the embodiments of the application, not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the application.

[0049] Embodiment one

[0050] To solve the technical problems in the background art, the following embodiments are given:

[0051] In combination with Figures 1-13As shown, the biomass fuel-based grain dryer provided by the present application comprises a main box body 1, a hot air furnace is installed at the top of the inside of the main box body 1, fuel supply bins 2 are symmetrically extended into the two sides of the hot air furnace, a grain discharge pipe 9a is arranged at the bottom of the inside of the main box body 1, a discharge chute 12 is arranged at the position opposite to the grain discharge pipe 9a on the outer wall of the main box body 1, a grain air-drying assembly is installed at the top of the grain discharge pipe 9a, the air inlet of the grain air-drying assembly is communicated with the hot air furnace, and the grain outlet of the grain air-drying assembly is communicated with the discharge chute 12; a group of closed grain guide bins 4 are arranged at the bottom of each fuel supply bin 2, a first grain outlet 41 is arranged on the side of the grain guide bin 4, a second grain outlet 13 is arranged at the position opposite to the first grain outlet 41 on the main box body 1, and the second grain outlet 13 is communicated with the grain air-drying assembly;

[0052] The two ends of the fuel supply bin 2 are in open structure, the inner end of the fuel supply bin 2 is communicated with the hot air furnace, and a second fan 22 is installed at the outer end of the fuel supply bin 2, the air outlet of the second fan 22 is located at the inner bottom of the fuel supply bin 2, and the air outlet of the second fan 22 faces the hot air furnace; a grain feeding inlet 21 is arranged on the top surface of the fuel supply bin 2, and a discharging hole 23 is arranged on the bottom surface of the fuel supply bin 2; the grain feeding inlet 21, the discharging hole 23 and the grain guide bin 4 are arranged in sequence from top to bottom; a feeding chute 11 is symmetrically installed on the top surface of the main box body 1, the feeding chute 11 is communicated with the inner top surface of the fuel supply bin 2,

[0053] A pushing assembly 3 is slidably installed in the inside of the fuel supply bin 2, the pushing assembly 3 comprises a pushing block 31 and a translation driving assembly 32, the translation driving assembly 32 is arranged on the side of the fuel supply bin 2, the pushing block 31 is in vertical telescopic structure, and the side of the pushing block 31 is assembled and connected with the translation driving assembly 32;

[0054] The pushing assembly 3 comprises the following states:

[0055] In the first state, the pushing block 31 is in elongated state, the pushing block 31 is located at the inner end of the inside of the fuel supply bin 2 to block the two sides of the hot air furnace, so that the hot air furnace is in closed combustion state; in the second state, the pushing block 31 keeps the first state position, the grain fed through the grain feeding inlet 21 is blown away by the second fan 22 to the outlet end of the fuel supply bin 2 in the falling process; in the third state, the pushing block 31 is changed to be in contracted state, the translation driving assembly 32 drives the pushing block 31 to move outwardly until the pushing block 31 moves to the position between the first fan 15 and the grain feeding inlet 21; in the fourth state, the pushing block 31 is changed to be in elongated state, the biomass particles are added to the inner outer end of the fuel supply bin 2 through the feeding chute 11, and the translation driving assembly 32 drives the pushing block 31 to move inwardly to push the chaff, straw and biomass particles in the fuel supply bin 2 into the hot air furnace.

[0056] In the above-mentioned scheme,

[0057] The fuel supply bin is optimized as a whole with the grain discharging and the biomass particle feeding groove, so that the following effects can be achieved:

[0058] 1. The grain injected through the grain injection port can pass through the second fan, and the rice hulls and straws blown out by the second fan are gathered at the inner end of the fuel supply bin. In this way, the impurities in the grain can be removed and selected, and the biomass raw materials in the grain can be recycled during the discharging process.

[0059] 2. The pushing block is designed as a telescopic structure, which can achieve the following effects: 2.1. During the grain discharging and drying, the pushing block blocks the outlet end of the fuel supply bin, thereby avoiding the heat loss of the hot blast stove and achieving the heat preservation effect. At the same time, the rice hulls and straws blown out of the grain are blocked and gathered by the pushing block; 2.2. When the fuel needs to be supplemented, the pushing block is retracted and moves backward, so that the pushing block avoids the rice hulls and straws and avoids pushing the impurities. When the pushing block moves to the outer end, the pushing block is extended again and then moves inward. The pushing block can push the rice hulls, straws and biomass particles into the hot blast stove together, realizing the automatic supplement of fuel. The rice hulls and straws can be used as supplemental fuel and can be quickly reused after collection.

[0060] In the embodiment, the pushing block includes an upper block body 311, a lower block body 312 and a first driving rod 313. The side wall of the upper block body 311 is connected to the translation driving assembly 32. The inner side of the bottom surface of the upper block body 311 is provided with a receiving groove 3111. The first driving rod 313 is installed in the interior of the upper block body 311. The bottom end of the first driving rod 313 is installed with the lower block body 312. When the pushing block is in the retracted state, the lower block body 312 is received in the receiving groove 3111. When the pushing block is in the extended state, the lower block body 312 is extended out of the upper block body 311. The lower block body 312 and the lower block body 312 have an overlapping portion. The bottom surface of the lower block body 312 is in sliding fit with the inner bottom surface of the fuel supply bin.

[0061] In the above scheme, the first driving rod can drive the lower block body to extend and retract. The lower block body can be received in the receiving groove to meet the need of avoidance, and can be extended to meet the need of blocking and pushing. The structure is simple and compact, and the extension and retraction control of the pushing block is more convenient.

[0062] In the embodiment, the hot blast stove comprises an outer stove body 71, an inner stove body 72, an ash discharge pipe 73 and an air outlet cavity 74, the upper and lower surfaces of the outer stove body 71 are closed structures, the top of the inner stove body 72 is an open structure and the bottom is a closed structure, the outer stove body 71 is fixed at the middle line in the inner portion of the main box body 1, the inner stove body 72 is concentrically and spacedly arranged in the inner portion of the outer stove body 71, the region between the inner stove body 72 and the outer stove body 71 is the air outlet cavity 74, the top of the inner stove body 72 is spaced from the inner top surface of the outer stove body 71, the inner bottom of the inner stove body 72 is provided with a grid plate 75 and an air outlet head 76, the grid plate 75 is arranged at the top of the air outlet head 76, the bottom of the air outlet head 76 is communicated with the first fan 15 through a conduit, the first fan 15 is arranged on the outer wall of the main box body 1, and the bottom surface of the inner stove body 72 is symmetrically provided with the inclined downward extending ash discharge pipe 73 which is sealingly penetrated through the bottom surface of the outer stove body 71; the inner end of the fuel supply bin 2 is sealingly penetrated through the outer stove body 71 and extends into the inner stove body 72.

[0063] In the above scheme, the fuel is sent into the inner stove body through the fuel supply bin, the first fan sends air into the inner stove body, the hot blast generated by combustion moves upward to the top end of the inner stove body and then is introduced into the air outlet cavity, and the hot blast is discharged downward to realize the mutual non-interference of the hot blast output channel, the combustion channel and the ash discharge channel and to avoid mutual cross flow.

[0064] The penetration of the ash discharge pipe through the air outlet cavity can heat the bottom of the air outlet cavity, ensure the temperature of the hot blast during discharge, realize the reheating of the hot blast, and meanwhile, the outer extension portion of the air outlet pipe can heat the top portion of the inner portion of the main box body, so that the exhaust pipe of the first fan can be heated to realize the preheating of the incoming air.

[0065] In the embodiment, the grain drying assembly comprises a grain fence assembly 5, the grain fence assembly 5 comprises a rectangular tube body 51, side material guide covers 52, an upper shell 53 and a second driving rod 54, the rectangular tube body 51 is vertically distributed and the top and bottom of the rectangular tube body 51 are open structures, the bottom end of the rectangular tube body 51 slidingly extends into the grain discharge pipe 9a, the two sides of the rectangular tube body 51 are symmetrically provided with the inclined upward extending side material guide covers, the top end of the rectangular tube body 51 is vertically provided with the upper shell 53, the top surface center of the upper shell 53 is vertically provided with the second driving rod 54, the second driving rod 54 is installed at the bottom surface center of the outer stove body 71, the inner wall of the main box body 1 is provided with a baffle 14 for stopping the side material guide covers, and the second driving rod 54 is used to drive the floating lifting movement of the grain fence assembly 5.

[0066] In the embodiment, the end portion of the side material guide cover is in U-shaped cross section and the upper shell 53 is in inverted U-shaped structure.

[0067] In the embodiment, the grain air-drying assembly further comprises a wind guide assembly 6, which comprises a first wind guide pipe 61, a shunt pipe 62, a second wind guide pipe 63, and a partition plate 64. The inside of the upper shell 53 is provided with a through slot 531, and the first wind guide pipe 61 is sealingly penetrated through the through slot 531. The top end of the first wind guide pipe 61 is communicated with the bottom of the air outlet cavity 74, and the bottom end of the first wind guide pipe 61 is vertically communicated with the shunt pipe 62. The two ends of the shunt pipe 62 are symmetrically communicated with the second wind guide pipe 63 extending upwardly and obliquely. The bottom surface of the second wind guide pipe 63 is provided with an air outlet mesh structure, and the second wind guide pipe 63 is arranged in parallel above the side material guide cover. The connection part of the second wind guide pipe 63 and the shunt pipe 62 is vertically provided with the partition plate 64 extending downwardly and vertically.

[0068] In the embodiment, the grain air-drying assembly comprises the following working steps:

[0069] S1, the second driving rod 54 drives the grain surrounding barrier assembly 5 to be in the retracted state, and the bottom end of the partition plate 64 abuts against the side material guide cover 52. The second wind guide pipe 63, the partition plate 64, the side material guide cover 52, and the inner wall of the main box form a grain closed cavity.

[0070] S2, the grain output from the grain material guide bin 4 passes through the first grain outlet 41 and the second grain outlet 13 and enters the grain closed cavity.

[0071] S3, the hot air generated by the inner furnace body 72 is output to the grain closed cavity through the first wind guide pipe 61, the shunt pipe 62, and the second wind guide pipe 63, so as to dry the grain. After passing through the grain closed cavity, the hot air reversely enters the grain material guide bin 4, so as to pre-dry the falling grain.

[0072] S4, the second driving rod 54 drives the grain surrounding barrier assembly 5 to move downwardly, and the upper shell 53 slides downwardly along the first wind guide pipe 61 until the bottom surface of the side material guide cover is stopped by the baffle 14. The side material guide cover and the partition plate 64 form a grain discharging gap, and the dried grain in S3 passes through the grain discharging gap and is discharged to the grain discharge pipe 9a.

[0073] In the above scheme,

[0074] 1. The second wind guide pipe can be used as an air outlet area and a plugging area. It can form a grain closed cavity together with the partition plate, the side material guide cover, and the inner wall of the main box, so as to realize closed drying of the grain and solve the problem of insufficient contact time with hot air and poor drying effect when the grain is directly output.

[0075] 2. The grain surrounding barrier assembly is designed as a lifting structure. When drying, the second driving rod drives the side material guide cover to be lifted to be closed, so as to meet the needs of closed drying. When discharging, the second driving rod drives the side material guide cover to move downwardly, and the dried grain can flow obliquely downwardly into the grain discharge pipe.

[0076] 3. The inverted U-shaped shell can meet the needs of connecting with the second driving rod and the side material guide cover, and can avoid the layout needs of the air guide assembly.

[0077] In the embodiment, the translation driving assembly 32 comprises a motor 321, a fixed plate 323 and a screw rod 322. The fixed plate is vertically arranged at the inner end of the fuel supply bin. The inner part of the fixed plate is horizontally threaded through the screw rod. The outer end of the screw rod is assembled and connected with the motor. The motor is fixedly connected with the fuel supply bin.

[0078] Embodiment two

[0079] In the embodiment, the outlet end of the ash discharge pipe 73 is communicated with the ash collecting assembly 8. The ash collecting assembly 8 comprises an outer cylinder 81 and an inner cylinder 82. The sidewall of the outer cylinder 81 is provided with a first ash discharge port 811 which is communicated with the ash discharge pipe 73. The inner cylinder 82 is rotationally mounted in the inner part of the outer cylinder 81. The inner part of the inner cylinder 82 is provided with a second ash discharge port 822. The outer wall of the inner cylinder 82 is provided with a connecting block 821. The inner part of the outer cylinder 81 is provided with a guide groove 812 through which the connecting block 821 slides. The outer end of the connecting block 821 is provided with an arc-shaped tooth ring 83. The tooth ring 83 is engaged with the adapter assembly 9.

[0080] In S1-S3, the inner cylinder 82 closes the first ash discharge port 811 from the inside, so that the ash discharge pipe 73 remains in a closed state, avoiding the heat in the inner furnace body 72 from being dissipated.

[0081] In S4, when the upper shell 53 moves downward, the tooth ring 83 is driven to rotate by the adapter assembly 9. The inner cylinder 82 is driven to rotate clockwise. The connecting block 821 moves along the guide groove 812 until the second ash discharge port 822 moves to the inside of the first ash discharge port 811. The ash in the inner furnace body 72 passes through the ash discharge pipe 73, the first ash discharge port 811 and the second ash discharge port 822 and enters the inner cylinder 82.

[0082] In the above scheme, the ash collecting assembly is designed as an inner and outer two-layer structure. In this way, during combustion, the inner cylinder can close the first ash discharge port from the inside, thereby avoiding the heat from being dissipated from the ash discharge pipe. When ash needs to be discharged, the inner cylinder can be rotated so that the second ash discharge port is rotated to the inside of the first ash discharge port. In this way, the ash in the inner furnace body can be output through the ash discharge pipe. In this way, the ash can be regularly discharged, ensuring the cleanliness of the inner furnace body and avoiding too much ash from being discharged through the air outlet cavity.

[0083] In the embodiment, the adapter assembly 9 comprises a tooth plate 91 and an adapter gear 92. The tooth plate 91 is vertically and symmetrically arranged on the top surface of the upper shell 53. The adapter gear 92 is engagedly installed between the tooth plate 91 and the tooth ring 83. The adapter gear 92 is rotationally installed on the inner wall of the main box body 1.

[0084] In the above scheme, by designing the adapter gear and the toothed plate, when the grain fence assembly needs to be lowered for discharging, the toothed plate can be driven to descend synchronously, the toothed plate drives the adapter gear to rotate, the adapter gear drives the gear ring to rotate, the inner cylinder rotates to the open state, and the grain discharging and ash discharging are simultaneously performed.

[0085] It should be noted that, in this document, the terms such as first and second are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between such entities or operations. Also, the terms "comprising", "containing" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent in such a process, method, article or apparatus. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of other identical elements in the process, method, article or apparatus including the element.

[0086] The above embodiments are only used to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A grain dryer based on biomass fuel, characterized in that: The system includes a main housing, with a hot air furnace installed at the top inside the main housing. Fuel supply bins extend symmetrically from both sides of the hot air furnace. A grain discharge pipe is located at the bottom inside the main housing. A discharge chute is opened on the outer wall of the main housing opposite to the grain discharge pipe. A grain drying assembly is installed at the top of the grain discharge pipe. The air inlet of the grain drying assembly is connected to the hot air furnace, and the grain outlet is connected to the discharge chute. Each fuel supply bin has a set of enclosed grain guide bins at the bottom. A first grain output port is opened on the side of the grain guide bin. A second grain output port is opened on the main housing opposite to the first grain output port. The second grain output port is connected to the grain drying assembly. Both ends of the fuel supply bin are open. The inner end of the fuel supply bin is connected to the hot air furnace, and a second fan is installed at the outer end of the fuel supply bin. The outlet of the second fan is located at the bottom of the fuel supply bin and faces the hot air furnace. A grain inlet is opened on the outer side of the top surface of the fuel supply bin, and a feeding hole is opened on the bottom surface of the fuel supply bin. The grain inlet, feeding hole, and grain guide bin are arranged opposite each other from top to bottom. A feeding trough is symmetrically installed on the top surface of the main body and is connected to the top surface of the inner end of the fuel supply bin. A pushing assembly is slidably installed inside the fuel supply bin. The pushing assembly includes a pushing block and a translation drive assembly. The translation drive assembly is located on the side of the fuel supply bin. The pushing block is a vertical telescopic structure. The pushing block includes an upper block, a lower block, and a first drive rod. The translation drive assembly is assembled and connected to the side wall of the upper block. A receiving groove is opened on the inner side of the bottom surface of the upper block. The first drive rod is installed inside the upper block. The pusher assembly includes the following states: In the first state, the pusher block is in an extended state and is located at the inner end of the fuel supply bin to block both sides of the hot blast stove, so that the hot blast stove is in a closed combustion state. In the second state, the pusher block remains in the first state position, and as the grain injected into the grain inlet falls, the second fan blows away the straw in the grain to the outlet of the fuel supply bin. In the third state, the pusher block changes to a retracted state, and the translation drive component drives the pusher block to move outward first, until it moves to the space between the second fan and the grain inlet. In the fourth state, the pusher block transforms into an elongated state, and the feeding trough adds biomass pellets to the inner outer end of the fuel supply bin. The translation drive component drives the pusher block to move inward, so as to push the rice husks, straw and biomass pellets in the fuel supply bin into the hot air furnace.

2. A grain dryer based on biomass fuel according to claim 1, characterized in that: The bottom end of the first drive rod is equipped with a lower block. When the pusher block is in the retracted state, the lower block is retracted into the receiving groove. When the pusher block is in the extended state, the lower block extends out of the upper block. The lower block and the upper block have an overlapping part. The bottom surface of the lower block slides and fits against the inner bottom surface of the fuel supply bin.

3. A grain dryer based on biomass fuel according to claim 2, characterized in that: The hot air stove includes an outer furnace body, an inner furnace body, an ash discharge pipe, and an air outlet chamber. The upper and lower surfaces of the outer furnace body are closed structures, while the top of the inner furnace body is open and the bottom is closed. The outer furnace body is fixed to the centerline of the main housing. The inner furnace body is concentrically spaced inside the outer furnace body. The area between the inner and outer furnace bodies is the air outlet chamber. There is a gap between the top of the inner furnace body and the inner top surface of the outer furnace body. The bottom of the inner furnace body is provided with a grid plate and an air outlet head. The grid plate is located on top of the air outlet head, and the bottom of the air outlet head is connected to a first fan through a duct. The first fan is located on the outer wall of the main housing. The bottom surface of the inner furnace body is symmetrically provided with an inclined downward-extending ash discharge pipe, which is sealed and penetrates the bottom surface of the outer furnace body. The inner end of the fuel supply bin is sealed and penetrates the outer furnace body and extends into the inner furnace body.

4. A grain dryer based on biomass fuel according to claim 3, characterized in that: The grain drying assembly includes a grain enclosure assembly, which comprises a rectangular tube, side guide covers, an upper shell, and a second drive rod. The rectangular tubes are vertically distributed and have open tops and bottoms. The bottom end of the rectangular tube slides into the grain outlet pipe. Side guide covers extending upwards are symmetrically arranged on both sides of the rectangular tube. The upper shell is vertically arranged at the top of the rectangular tube. The second drive rod is vertically arranged at the center of the top surface of the upper shell. The second drive rod is installed at the center of the bottom surface of the outer furnace body. The inner wall of the main box is provided with a baffle to stop the side guide covers. The second drive rod is used to drive the grain enclosure assembly to float and move up and down.

5. A grain dryer based on biomass fuel according to claim 4, characterized in that: The end section of the side guide cover is U-shaped, and the upper shell has an inverted U-shaped structure.

6. A grain dryer based on biomass fuel according to claim 5, characterized in that: The grain drying assembly also includes an air guide assembly, which includes a first air guide pipe, a diversion pipe, a second air guide pipe, and a partition. The upper shell has a through groove, and the first air guide pipe passes through the through groove in a sealed manner. The top end of the first air guide pipe is connected to the bottom of the air outlet chamber, and the bottom end of the first air guide pipe is vertically connected to the diversion pipe. The two ends of the diversion pipe are symmetrically connected to the second air guide pipe, which extends upward at an angle. The bottom surface of the second air guide pipe has an air outlet mesh structure. The second air guide pipe is relatively parallel to the side guide cover and is directly above it. A partition extending downward vertically is provided at the connection between the second air guide pipe and the diversion pipe.

7. A grain dryer based on biomass fuel according to claim 6, characterized in that: The grain drying component includes the following working steps: S1. The second drive rod drives the grain enclosure assembly to be in a retracted state. The bottom end of the partition is in contact with the side guide cover. The second air guide pipe, the partition, the side guide cover, and the inner wall of the main box form a closed grain cavity. S2. Grain output from the grain feed hopper passes through the first grain output port and the second grain output port and enters the grain closed chamber. S3. The hot air generated by the inner furnace body is output to the grain sealing chamber through the first air guide pipe, the diversion pipe and the second air guide pipe to dry the grain; after passing through the grain sealing chamber, the hot air enters the grain feeding bin in the opposite direction to pre-dry the falling grain. S4. The second drive rod drives the grain enclosure assembly to move downwards. The upper housing slides down along the first air guide pipe until the bottom surface of the side guide cover is stopped by the baffle. A grain discharge gap is formed between the side guide cover and the partition. S3. The dried grain passes through the grain discharge gap and is discharged into the grain outlet pipe.

8. A grain dryer based on biomass fuel according to claim 7, characterized in that: The outlet end of the ash discharge pipe is connected to an ash collection assembly, which includes an outer cylinder and an inner cylinder. The side wall of the outer cylinder is provided with a first ash discharge port, which is connected to the ash discharge pipe. The inner cylinder is rotatably installed inside the outer cylinder. The inner cylinder is provided with a second ash discharge port. The outer wall of the inner cylinder is provided with a connecting block. The inner cylinder is provided with a guide groove for the connecting block to slide through. The outer end of the connecting block is provided with an arc-shaped toothed ring, which meshes with the adapter assembly. In S1-S3, the inner cylinder seals the first ash discharge port from the inside, keeping the ash discharge pipe closed to prevent heat from escaping from the inner furnace body. In S4, when the upper shell moves downward, the gear ring is driven to rotate through the adapter assembly. The gear ring drives the inner cylinder to rotate clockwise. The connecting block moves along the guide groove until the second ash outlet moves to the inside of the first ash outlet, so that the smoke and ash in the inner furnace body passes through the ash discharge pipe, the first ash outlet, and the second ash outlet and enters the inner cylinder.

9. A grain dryer based on biomass fuel according to claim 8, characterized in that: The adapter assembly includes a toothed plate and an adapter gear. The toothed plate is vertically and symmetrically disposed on the top surface of the upper housing. The adapter gear is meshed between the toothed plate and the toothed ring and is rotatably mounted on the inner wall of the main housing.

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