A grain rush straw comprehensive utilization system

Abstract

The present application relates to the technical field of grain processing, in particular to a grain harvesting and straw comprehensive utilization system, which comprises a mobile grain harvesting and drying module connected with a straw pretreatment module, a biogas fermentation module, a biogas purification and liquefaction module, an intelligent mixing and grid connection module, a byproduct resource utilization module and a poultry organic manure biogas fermentation module in sequence, forming an energy closed loop comprehensive utilization method. The grain harvesting and straw comprehensive utilization system of the present application is provided with a built-in real-time gas quality monitoring and dynamic proportioning system, and an intelligent algorithm is used to automatically adjust the mixing ratio (1:4-1:9) of biogas and pipeline natural gas according to the purity of biogas (97%-99%), so that the calorific value of the mixed gas is stabilized at 33.5-36.8 MJ / m³, which is suitable for the urban pipeline network standard. Through the integrated dry desulfurization-membrane separation decarburization-methane residue fertilizer integrated unit, the H2S removal rate is greater than or equal to 99.9%, the CO2 recovery rate is greater than or equal to 92%, and the methane residue organic fertilizer conversion rate is 100%, so that the full amount of agricultural waste is realized.

Description

Technical Field

[0001] This invention relates to the field of grain processing technology, specifically to a comprehensive utilization system for grain harvesting straw. Background Technology

[0002] A grain dryer is a mechanical device specifically designed for dehydrating and drying grains. It plays a crucial role in modern agricultural production and grain processing, effectively controlling the moisture content of grains and preventing mold, sprouting, or spoilage, thereby ensuring the stable quality of grains during storage, transportation, and subsequent processing. Existing drying equipment can be mainly divided into several types based on different heat sources and heat transfer methods. For example, some use electric heating elements for direct or indirect heating, others use fuel oil or gas combustion to generate clean hot air for convection drying, and still others utilize biomass fuels, steam, or solar energy as energy sources to meet the energy-saving, environmental protection, and high-efficiency requirements of different scenarios.

[0003] Among these devices, the drum dryer is a common and widely used type. Its main body is a rotating cylinder, which is usually installed at a certain angle. During operation, the grain enters the inside of the drum from the feed end. As the drum rotates slowly, the grain tumbles inside the drum and comes into full contact with the hot air, gradually being dried. Finally, under the action of gravity, it moves along the inclined drum wall to the discharge end and is discharged.

[0004] However, in actual operation, as the grain is heated and evaporates moisture inside the drum, some grains lose water rapidly on their surface, which easily leads to the precipitation of sticky substances on the surface. This causes the grain grains to stick together and form clumps of varying sizes. As these clumps roll, the internal heat and mass exchange is hindered, making it difficult for heat to be evenly transferred to the center of the clumps, and the internal moisture cannot be discharged smoothly. At the same time, due to the inclined structure and rotational motion of the drum, the grain tends to flow towards the discharge end, and the clumps of grain often move to the outlet area before they can be completely dispersed. This results in uneven drying process—some grains are over-dried, while the clumps still contain high moisture content.

[0005] Therefore, the present invention provides a comprehensive utilization system for grain harvesting straw to solve the above problems. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, the present invention provides a grain harvesting and straw comprehensive utilization system to solve the problem that some grains become sticky and clump together due to the rapid evaporation of surface moisture during the drying process, making it difficult for the grain inside to fully contact the external hot air, which in turn easily leads to uneven grain drying.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0008] A comprehensive utilization system for grain harvesting and straw includes a mobile grain harvesting and drying module, a straw pretreatment module, a biogas fermentation module, a biogas purification and liquefaction module, an intelligent blending and grid connection module, a by-product resource utilization module, and poultry organic manure and a biogas fermentation module connected in sequence. The drying module and the fermentation module are connected through a waste heat recovery pipeline, and the liquefaction module and the drying module are connected through a heat feedback pipeline, forming a closed-loop comprehensive utilization method for energy.

[0009] Preferably, the intelligent blending and grid connection module includes an online calorific value detector, an intelligent control unit, and a dynamic proportioning valve. The intelligent control unit receives signals from the calorific value detector and controls the proportioning valve to adjust the blending ratio of biogas and pipeline natural gas, with the ratio adjustment range being 1:4 to 1:9.

[0010] Preferably, the straw pretreatment and biogas fermentation module adopts a "crushing → high-temperature puffing → enzymatic hydrolysis" pretreatment process, with a puffing temperature of 160-180℃, a pressure of 2.5-3.0MPa, an enzymatic hydrolysis time of 4-6 hours, and a waste heat coil to maintain the fermentation temperature of 35-38℃.

[0011] Preferably, the biogas purification and liquefaction module is equipped with a dry desulfurization tower, a hollow fiber membrane separation device and a single-stage mixed refrigerant liquefaction system in sequence. The desulfurization tower has an H2S removal rate of ≥99.9%, the membrane separation device has a CH4 recovery rate of ≥90%, and the liquefied LNG has a purity of ≥99.5%.

[0012] Preferably, the mobile grain harvesting and drying module includes a drying cylinder, which is inclined. The two ends of the drying cylinder are the feeding end and the discharging end, respectively. Grain fed into the drying cylinder through the feeding end can be moved to the discharging end for discharge. The drying cylinder includes an outer shell and an inner shell rotatably connected to the inner wall of the outer shell. The outer shell and the inner shell are coaxially arranged. The inner shell has an inner cavity for carrying grain. The feeding end and the discharging end of the drying cylinder are respectively equipped with a feeding component and a discharging component. The drying drum has multiple drying mechanisms arranged equidistantly inside. Each drying mechanism includes multiple top plates arranged at equal intervals. The multiple top plates are arranged in a ring inside the inner shell. Two side frames are symmetrically fixed on the side of the top plate facing the axis of the inner shell. A lifting component is arranged between the two side frames. The lifting component can collect and scatter the grain for drying.

[0013] Preferably, the lifting component includes a limiting plate fixed between two side frames, a rotatable bearing plate at the bottom of the limiting plate, a concave cavity on the side of the bearing plate away from the axis of the inner shell to support the grain, a connecting shaft installed on the opposite side of the bearing plate and the limiting plate, and both ends of the connecting shaft are rotatably connected to the side frames, the connecting shaft being used to drive the bearing plate to rotate.

[0014] Preferably, the drying mechanism further includes a delay component, which includes a top column fixed to the top of the top plate, multiple sliding openings and receiving grooves communicating with the sliding openings on the inner wall of the inner shell, the sliding openings and receiving grooves corresponding one-to-one, and the sliding openings corresponding one-to-one with the top plate, and the top column slidably connected inside the corresponding sliding opening, a first drive shaft is provided on one side of the top column, a connecting block is installed between the first drive shaft and the top column, a first slide rail is provided on the first drive shaft, and the first drive shaft is slidably connected inside the first slide rail.

[0015] Preferably, the drying mechanism further includes a compression assembly, which includes a second drive shaft rotatably connected to the inner wall of the side frame, and one end of the first drive shaft extending into the side frame is fixed to one end of the drive shaft. A connecting plate is provided on one side of the second drive shaft, and a transmission component is connected between the connecting plate and the second drive shaft to drive the second drive shaft to rotate.

[0016] Preferably, a lifting column is fixed to the top of the connecting plate, and a first linkage shaft is fixed to one end of the lifting column that extends through the side frame and the top column into the receiving groove. A second slide rail is provided on the inner wall of the receiving groove, and the second slide rail is inclined. The first linkage shaft is slidably connected to the inside of the second slide rail.

[0017] Preferably, the drying mechanism further includes a dispersing component, which includes a rotating shaft symmetrically arranged on a limiting plate. The limiting plate has symmetrically opened arc-shaped grooves, and the bottom of the rotating shaft is rotatably connected to the inner bottom wall of the corresponding arc-shaped groove. A soft strip is fixed to the outer wall of the rotating shaft, and the rotating shaft can rotate to make the soft strip rub the grain.

[0018] The beneficial effects of this invention are as follows: 1. Through a built-in real-time gas quality monitoring and dynamic blending system, the system automatically adjusts the blending ratio (1:4 to 1:9) of biogas and pipeline natural gas based on the purity of biogas (97%–99%) using intelligent algorithms, ensuring that the calorific value of the blended gas remains stable at 33.5–36.8 MJ / m³, adapting to urban pipeline network standards. 2. By integrating dry desulfurization → membrane separation decarbonization → biogas residue fertilizer production into an integrated unit, the H2S removal rate is ≥99.9%, the CO2 recovery rate is ≥92%, and the biogas residue organic fertilizer conversion rate is 100%, realizing the full resource utilization of agricultural waste.

[0019] 3. When the bearing plate rotates to the top with the inner shell, the orientation of the concave cavity changes, and the grain is evenly scattered to form a "material curtain". This material curtain shape allows the grain to be removed from the piled state and directly exposed to the heat source environment, which greatly improves the heat exchange efficiency. When the inner shell rotates, the first drive shaft slides along the slide rail trajectory and pushes the top column at the peak and valley positions to drive the top plate to slide towards the feeding end, so that the grain carried by the bearing plate moves backward synchronously, extending the residence path of the grain in the inner shell, thereby allowing the grain to fully contact the heat source for drying.

[0020] 4. When the bearing plate moves to the top of the inner shell, the lifting column of the dispersing component slides along the second slide rail, driving the connecting plate and the first rack to rise. Through the meshing transmission of the first rack and the first toothed ring, the bearing plate is driven to rotate around the connecting shaft, so that the grain in the concave cavity is squeezed between the bearing plate and the limiting plate, initially breaking up large clumps. At the same time, the second linkage shaft of the dispersing component moves with the top plate, and the second toothed ring on its outer wall meshes with the second rack on the linkage plate, driving the rotating shaft to rotate along the arc groove. The soft strip on the rotating shaft rubs the squeezed grain, thereby dispersing the clumps of grain. Attached Figure Description

[0021] Figure 1 This is a system working diagram of the present invention; Figure 2 This is a schematic diagram of the structure of the present invention; Figure 3 This is a schematic diagram of the feeding component of the present invention; Figure 4 This is a schematic diagram of the inner shell structure of the present invention; Figure 5 This is a schematic diagram of the drying mechanism of the present invention; Figure 6 This is a schematic diagram of the first three-dimensional cross-section of the inner shell of the present invention; Figure 7 This is a schematic diagram of the material lifting assembly of the present invention; Figure 8 This is a schematic diagram of the structure of the compression component of the present invention; Figure 9 This is a schematic diagram of the structure of the receiving groove of the present invention; Figure 10 This is a schematic diagram of the structure of the first slide rail of the present invention; Figure 11 This is a schematic diagram of the dispersing component of the present invention.

[0022] In the picture: 10. Drying drum; 101. Outer shell; 102. Inner shell; 11. Feeding component; 110. Front baffle; 111. Feeding hopper; 112. Outer support; 12. Discharge component; 120. Rear baffle; 121. Discharge hopper; 13. Linkage component; 130. External gear ring; 131. Drive source; 132. Drive gear disc; 20. Drying mechanism; 21. Lifting assembly; 210. Top plate; 211. Side frame; 212. Lifting component; 2120. Limiting plate; 2121. Bearing plate; 2122. Connecting shaft; 22. Delay assembly; 220. Pusher; 2201. Top post; 2202. Slide opening; 2203. Receiving groove; 221. First drive component; 2210. First drive shaft; 2211. Connecting block; 2212. Annular groove; 2213. First slide rail; 23. Compression assembly; 230. Adjusting component; 2301. Second drive shaft; 2302. First gear ring; 2303. First rack; 231. Second drive component; 2310. Connecting plate; 2311. Lifting column; 2312. First linkage shaft; 2313. Second slide rail; 24. Disassembly assembly; 240. Disassembly component; 2401. Rotating shaft; 2402. Arc groove; 2403. Flexible strip; 241. Third driving component; 2410. Second linkage shaft; 2411. Second gear ring; 2412. Linkage plate; 2413. Second gear rack. Detailed Implementation

[0023] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0024] Example 1 As attached Figure 1 As shown, a comprehensive utilization system for grain harvesting and straw includes a mobile grain harvesting and drying module → straw pretreatment → biogas fermentation module → biogas purification and liquefaction module → intelligent blending and grid connection module and by-product resource utilization module, poultry organic manure → biogas fermentation module connected in sequence. The drying module and fermentation module are connected through waste heat recovery pipelines, and the liquefaction module and drying module are connected through heat energy feedback pipelines, forming a closed-loop comprehensive utilization of energy.

[0025] The mobile grain harvesting and drying module includes a combine harvesting linkage mechanism and a drying device. The wet grain harvested by the combine harvester is directly fed into the drying device for drying.

[0026] The straw pretreatment module and biogas fermentation module consist of a shearing and crushing device, a high-temperature puffing machine, a CSTR and UASB series reactor, and a waste heat utilization coil. The crushing device breaks the straw into 2-5cm, and then it is puffed at 160-180℃ and 2.5-3.0MPa to destroy the lignin structure. After enzymatic hydrolysis, the degradation rate is increased to more than 78%. The waste heat coil built into the fermentation tank is connected to the drying module to maintain a medium-temperature fermentation environment of 35 and 38℃. The raw material gas production rate reaches 320 and 360m³ / ton of dry straw.

[0027] The biogas purification and liquefaction module integrates a dry desulfurization tower, a hollow fiber membrane separation device, and a single-stage mixed refrigerant liquefaction system. The desulfurization tower uses an iron oxide-based adsorbent to reduce H2S in the biogas to below 1 ppm. The membrane separation device achieves CH4 and CO2 separation at a pressure of 0.8–1.2 MPa, with a CH4 recovery rate of ≥90%. The liquefaction system cools the purified gas to -162℃ through mixed refrigerant circulation to produce LNG, which is stored in a vacuum-insulated storage tank for later use.

[0028] The intelligent blending and grid connection module includes a compressor unit, an online calorimeter, a dynamic proportioning valve, and a safety monitoring unit. After the purified biogas is compressed to 4-6 MPa, the gas quality parameters are detected in real time by the calorimeter. The intelligent control system adjusts the opening of the proportioning valve according to the detection results. After being uniformly mixed with pipeline natural gas through a static mixer, it is connected to the city's medium-pressure pipeline network. Tetrahydrothiophene (concentration 8-20 mg / m³) is added simultaneously to meet safety requirements.

[0029] The by-product resource utilization module consists of a biogas residue dewatering machine, an organic fertilizer granulator, and a CO2 compression device. After the biogas residue is dewatered to a moisture content of ≤30%, it is made into granular organic fertilizer. The CO2 is compressed and liquefied and then supplied as an industrial raw material, thus realizing the complete recovery of pollutants.

[0030] During the grain harvesting phase: the wet grain harvested by the combine harvester is directly sent to the drying device, and the straw is collected by the linkage baling mechanism and temporarily stored in the raw material silo. The drying device prioritizes the use of straw gasification gas for heating, and the waste heat of the exhaust gas is recovered through a heat exchanger.

[0031] Straw treatment and biogas production stage: After being crushed, expanded and enzymatically hydrolyzed, the straw is sent to the fermentation module. The residual heat from drying is used to keep the fermentation tank warm through coils. Under the action of anaerobic bacteria, the straw generates biogas containing 55% to 65% CH4.

[0032] Purification and liquefaction stage: After the biogas is desulfurized by dry process to remove H2S, it enters the membrane separation unit to remove CO2, and obtains high-purity biogas. Part of it directly enters the blending module, and the rest is made into LNG for storage through the liquefaction system.

[0033] During the blending and grid connection stage: the intelligent system monitors the purity of biogas and pipeline parameters in real time, dynamically adjusts the blending ratio, and connects the blended gas to the city gas pipeline network after odorization and testing.

[0034] By-product utilization stage: The biogas residue produced by fermentation is made into organic fertilizer, and the CO2 recovered from decarbonization is compressed and stored to achieve resource recycling.

[0035] Example 2 As attached Figures 2-11As shown, the drying device includes a drying cylinder 10, which is inclined. The two ends of the drying cylinder 10 are the feeding end and the discharging end, respectively. Grain fed into the drying cylinder 10 through the feeding end can move to the discharging end for discharge. The drying cylinder 10 includes an outer shell 101 and an inner shell 102 rotatably connected to the inner wall of the outer shell 101. The outer shell 101 and the inner shell 102 have the same axis. The inner shell 102 has an inner cavity that can accommodate grain for drying. A movable base is provided on the lower side of the outer shell 101, and the outer shell 101 is mounted on the base. The base can support the outer shell 101.

[0036] The drying cylinder 10 is equipped with a feeding component 11 and a discharging component 12 on both sides. The feeding component 11 corresponds to the feeding end of the drying cylinder 10, and the discharging component 12 corresponds to the discharging end of the drying cylinder 10. The grain can enter the interior of the inner shell 102 through the feeding component 11 for drying, and the dried grain can be discharged through the discharging component 12.

[0037] The feeding component 11 includes a front baffle 110, which abuts against the feed inlet of the outer shell 101. A feeding hopper 111 is installed on the top of the front baffle 110. The feeding hopper 111 has a feeding end and a discharging end. The feeding end of the feeding hopper 111 extends beyond the top of the front baffle 110. The discharging end of the feeding hopper 111 passes through the interior of the front baffle 110 and extends into the feeding end of the inner shell 102. After the grain is poured into the feeding end of the feeding hopper 111, it is discharged into the inner cavity of the inner shell 102 through its discharging end. An outer support 112 is installed on the outside of the front baffle 110 and abuts against the ground to support the front baffle 110 and maintain its stability.

[0038] The discharge component 12 includes a rear baffle 120 installed on the outer shell 101, and the rear baffle 120 corresponds to the discharge end of the drying cylinder 10. The bottom of the rear baffle 120 has a discharge hopper 121, and the grain dried inside the inner shell 102 can be discharged through the discharge hopper 121 at the bottom of the rear baffle 120.

[0039] A linkage 13 is installed on the inner shell 102 to drive the inner shell 102 to rotate axially, thereby driving the grain inside the inner cavity to move towards the discharge end of the drying cylinder 10 for discharge.

[0040] The linkage 13 includes an external gear ring 130 installed on the outer wall of the inner shell 102. The external gear ring 130 is meshed with a drive gear disk 132. A drive source 131 is installed on the base, and the output end of the drive source 131 can drive the drive gear disk 132 to rotate, thereby driving the inner shell 102 to rotate along its axial direction inside the outer shell 101.

[0041] When the grain is being dried, it is first poured into the inner shell 102 through the feeding end of the feeding hopper 111, and then flows into the inner cavity of the inner shell 102 through the discharge end of the feeding hopper 111. In this embodiment, since a hot air connector is installed on the rear cover 120, it can be connected to an external heat source, and the hot air can enter the inner shell 102 through the hot air connector, so that the grain inside the inner shell 102 comes into contact with the heat source for drying. The output end of the drive source 131 drives the drive gear 132 to rotate, and the drive gear 132 interacts with the outer gear ring. The meshing connection of 130 drives the inner shell 102 to rotate axially. Since the outer shell 101 has an inclined angle, the grain inside the inner shell 102 can slowly flow to the discharge end of the drying cylinder 10. When the grain flows to the interior of the rear baffle 120 through the discharge end, it can be discharged through the discharge hopper 121. Since the rear baffle 120 is equipped with a connecting pipe, the end of the connecting pipe away from the rear baffle 120 is connected to the fermentation tank in the fermentation module. The residual heat after drying the grain inside the drying cylinder 10 can flow into the coil inside the fermentation tank through the connecting pipe.

[0042] The drying cylinder 10 is equipped with multiple drying mechanisms 20, which are arranged at equal intervals along the axial direction of the inner shell 102 to improve the drying efficiency of grain.

[0043] The drying mechanism 20 includes a lifting component 21, a delay component 22, a compaction component 23, and a dispersing component 24. The lifting component 21 can collect and scatter the grain inside the inner shell 102 so that the grain forms a uniform material curtain inside the inner shell 102 and contacts the heat source. The delay component 22 can slow down the speed at which the grain inside the inner shell 102 flows to the discharge end of the drying cylinder 10, thereby extending the contact time between the grain and the heat source and drying it thoroughly. The compaction component 23, together with the dispersing component 24, can disperse the grain collected by the lifting component 21, thereby preventing the grain from clumping together.

[0044] The lifting assembly 21 includes multiple top plates 210 arranged at equal intervals. The multiple top plates 210 are arranged in a ring inside the inner shell 102. Two side frames 211 are symmetrically fixed on the side of the top plate 210 facing the axis of the inner shell 102. A lifting element 212 is arranged between the two side frames 211, which can collect and scatter the grain, so that the grain forms a uniform material curtain inside the inner shell 102 and comes into contact with the heat source for drying.

[0045] The lifting component 212 includes a limiting plate 2120 fixed between two side frames 211. The bottom of the limiting plate 2120 is provided with a rotatable bearing plate 2121. The bearing plate 2121 has a concave cavity on the side away from the axis of the inner shell 102, which can bear the grain. A connecting shaft 2122 is installed on the opposite side of the bearing plate 2121 and the limiting plate 2120, and both ends of the connecting shaft 2122 are rotatably connected to the side frame 211. The connecting shaft 2122 is used to drive the bearing plate 2121 to rotate.

[0046] The delay component 22 includes a pusher 220 and a first drive 221. The first drive 221 is used to drive the pusher 220 to move the top plate 210 laterally along the axial direction of the inner shell 102, thereby delaying the residence time of the grain inside the inner shell 102 so that the grain can fully contact the heat source for drying.

[0047] The pusher 220 includes a top post 2201 fixed to the top of the top plate 210. The inner wall of the inner shell 102 has multiple sliding openings 2202 and receiving grooves 2203 connected to the sliding openings 2202. The sliding openings 2202 and the receiving grooves 2203 correspond one-to-one, and the sliding openings 2202 correspond one-to-one with the top plate 210. The top post 2201 is slidably connected inside the corresponding sliding opening 2202, and the top plate 210 can block the sliding openings 2202.

[0048] It should be noted that when the pusher 220 slides along the extension trajectory of the slide 2202, the top plate 210 always blocks the slide 2202, that is, the extension length of the slide 2202 is less than the overall length of the top plate 210.

[0049] The first driving member 221 includes a first driving shaft 2210 disposed inside the receiving groove 2203, and the first driving shaft 2210 is inverted T-shaped. A connecting block 2211 is installed between the first driving shaft 2210 and the top column 2201. One end of the connecting block 2211 is fixed to the outer ring surface of the first driving shaft 2210, and the other end of the connecting block 2211 has a circular hole adapted to the top column 2201. The outer wall of the top column 2201 is fixed to the inner wall of the corresponding circular hole. The first driving shaft 2210 can drive the pusher 220 connected to the top column 2201 to slide axially along the inner shell 102 through the connecting block 2211.

[0050] The inner wall of the outer shell 101 is provided with a plurality of annular grooves 2212 arranged at equal intervals. The annular grooves 2212 are arranged along the axial direction of the outer shell 101, and the annular grooves 2212 correspond one-to-one with the drying mechanism 20.

[0051] It should be noted that the receiving grooves 2203 arranged in a ring form a group, and each ring groove 2212 corresponds to a group of receiving grooves 2203, and each group of receiving grooves 2203 is connected to the corresponding ring groove 2212.

[0052] Each annular groove 2212 has a first slide rail 2213 fixed on its inner wall. The first slide rail 2213 has an annular segment and an arc segment. The two ends of the annular segment are connected to the two ends of the arc segment respectively, and a peak and valley are formed between the two ends of the arc segment and the annular segment.

[0053] It should be noted that since the receiving grooves 2203 arranged in a ring form a group, the first drive shafts 2210 arranged in a ring also form a group, and each first slide rail 2213 corresponds to a group of first drive shafts 2210, and the top of each group of first drive shafts 2210 is slidably connected to the inside of the corresponding first slide rail 2213.

[0054] A limiting member is connected between the outside of the first drive shaft 2210 and the inside of the receiving groove 2203 to support the first drive shaft 2210 and thus maintain the stability of the first drive shaft 2210.

[0055] The limiting component includes a side support plate fixed on the outer wall of the first drive shaft 2210. The inner shell 102 is provided with a side limiting groove that is adapted to the side support plate. The receiving groove 2203 is connected to the side limiting groove. The side support plate is slidably connected inside the side limiting groove. The side support plate and the side limiting groove are used to limit the first drive shaft 2210, thereby maintaining the stability of the first drive shaft 2210 when it slides.

[0056] When the inner shell 102 rotates counterclockwise around its axial direction, as the grain enters the interior of the inner shell 102 through the feed hopper 111, the grain falls into the concave cavity of the support plate 2121. As the inner shell 102 rotates, the support plate 2121 carrying the grain moves to the top of the inner shell 102. At this time, the concave cavity of the support plate 2121 faces upward, and the rotating inner shell 102 drives the first drive shaft 2210 to slide along the extension trajectory of the first slide rail 2213. When the support plate 2121 slides to the top of the inner shell 102, the first drive shaft 2210 slides to the peak and valley of the first slide rail 2213, and the first drive shaft 2210 is pushed by the peak and valley of the first slide rail 2213. The top column 2201 moves inside the sliding opening 2202, and the top plate 210 slides towards the feed end of the drying cylinder 10. As the inner shell 102 rotates, the bearing plate 2121 moves backward, so that the grain carried by the bearing plate 2121 also moves to the feed end of the drying cylinder 10. When the concave cavity of the bearing plate 2121 faces downward, the grain carried by the bearing plate 2121 will form a scattered shape, thereby forming a material curtain inside the inner shell 102, so that the grain is evenly dried by the heat source. As the inner shell 102 continues to rotate, the first drive shaft 2210 slides from the peak and valley to the annular section. At this time, the top plate 210, the lifting member 212, and the first drive shaft 2210 are all reset to their initial positions.

[0057] The dispersing component 23 includes an adjusting member 230 and a second driving member 231 disposed on the side frame 211. The second driving member 231 can drive the carrying plate 2121 to flip by driving the adjusting member 230, thereby squeezing the grain carried in the concave cavity of the carrying plate 2121 to disperse it.

[0058] The adjusting member 230 includes a second drive shaft 2301 rotatably connected to the inner wall of the side frame 211, and one end of the first drive shaft 2210 extending into the side frame 211 is fixed to one end of the second drive shaft 2301. A first toothed ring 2302 is mounted on the outer ring surface of the second drive shaft 2301, and the first toothed ring 2302 is meshed with a first rack 2303. One side of the first rack 2303 is connected to the second drive member 231. When the second drive member 231 slides inside the side frame 211, the bearing plate 2121 can be driven to rotate through the cooperation of the first rack 2303 and the first toothed ring 2302.

[0059] The second driving component 231 includes a connecting plate 2310 fixed to the top of the first rack 2303. A lifting column 2311 is fixed to the top of the connecting plate 2310. When the lifting column 2311 slides up and down, it can drive the connecting shaft 2122 to rotate through the first gear ring 2302 and the first rack 2303, thereby adjusting the angle of the bearing plate 2121. The lifting column 2311 extends through the side frame 211 and the top column 2201 and extends into the receiving groove 2203. A first linkage shaft 2312 is fixed to one end of the lifting column 2311. The lifting column 2311 can slide up and down inside the side frame 211 and the top column 2201 to drive the connecting plate 2310 to slide up and down. A second slide rail 2313 is provided on the inner wall of the receiving groove 2203. The second slide rail 2313 is inclined, and the first linkage shaft 2312 is slidably connected inside the second slide rail 2313.

[0060] When the first drive shaft 2210 slides from the arc section of the first slide rail 2213 to the peak and valley, the first drive shaft 2210 drives the top column 2201 to slide from the inside of the slide opening 2202, while the first linkage shaft 2312 slides from the bottom end of the second slide rail 2313 to its top end. At this time, the first linkage shaft 2312 can drive the connecting plate 2310 to move upward. The connecting plate 2310 drives the second drive shaft 2301 to rotate through the meshing of the first rack 2303 and the first toothed ring 2302. The second drive shaft 2301 drives the bearing plate 2121 to flip through the connecting shaft 2122. At this time, the concave cavity of the bearing plate 2121 is close to the limiting plate 2120, and the grain carried inside the concave cavity will be squeezed by the bearing plate 2121 and the limiting plate 2120, thereby crushing the clumped grain.

[0061] The dispersing component 24 includes a dispersing element 240 and a third driving element 241. The third driving element 241 drives the dispersing element 240 to knead the grain inside the concave cavity of the support plate 2121, thereby improving the grain dispersion efficiency.

[0062] The dispersing component 240 includes a rotating shaft 2401 symmetrically arranged on the limiting plate 2120. The limiting plate 2120 has symmetrical arc-shaped grooves 2402, and the bottom of the rotating shaft 2401 is rotatably connected to the inner bottom wall of the corresponding arc-shaped groove 2402. A soft strip 2403 is fixed to the outer wall of the rotating shaft 2401. When the third driving component 241 drives the rotating shaft 2401 to rotate, the soft strip 2403 on the rotating shaft 2401 can knead and separate the grain inside the bearing plate 2121.

[0063] The third driving component 241 includes a second linkage shaft 2410, and one end of the rotating shaft 2401 extending through the limiting plate 2120 and the top plate 210 into the receiving groove 2203 is fixed to the bottom of the second linkage shaft 2410. A second toothed ring 2411 is installed on the outer surface of the second linkage shaft 2410. A linkage plate 2412 is fixed on the inner wall of the receiving groove 2203. The linkage plate 2412 is Z-shaped. A second rack 2413 is fixed on both inner sides of the linkage plate 2412. The second rack 2413 corresponds one-to-one with the second linkage shaft 2410. The second toothed ring 2411 on the second linkage shaft 2410 is engaged with the second rack 2413.

[0064] When the first drive shaft 2210 slides from the arc section of the first slide rail 2213 to the peak and valley, the first drive shaft 2210 drives the top column 2201 to slide from the inside of the slide opening 2202. At this time, the second gear ring 2411 and the second gear rack 2413 drive the second linkage shaft 2410 to rotate, and the second linkage shaft 2410 drives the rotating shaft 2401 to rotate. The two second linkage shafts 2410 can knead the grain inside the bearing plate 2121 through the soft strip 2403, thereby separating the clumped grain.

[0065] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A comprehensive utilization system for grain harvesting straw, characterized in that: The system includes a mobile grain harvesting and drying module, a straw pretreatment module, a biogas fermentation module, a biogas purification and liquefaction module, an intelligent blending and grid connection module, a by-product resource utilization module, and poultry organic manure and a biogas fermentation module, connected in sequence. The drying module and the fermentation module are connected through a waste heat recovery pipeline, and the liquefaction module and the drying module are connected through a heat energy feedback pipeline, forming a closed-loop comprehensive energy utilization method.

2. The grain harvesting straw comprehensive utilization system according to claim 1, characterized in that, The intelligent blending and grid connection module includes an online calorific value detector, an intelligent control unit, and a dynamic proportioning valve. The intelligent control unit receives signals from the calorific value detector and controls the proportioning valve to adjust the blending ratio of biogas and pipeline natural gas, with the ratio adjustment range being 1:4 to 1:

9.

3. The grain harvesting straw comprehensive utilization system according to claim 1, characterized in that, The straw pretreatment and biogas fermentation module adopts a "crushing → high-temperature puffing → enzymatic hydrolysis" pretreatment process. The puffing temperature is 160-180℃, the pressure is 2.5-3.0MPa, the enzymatic hydrolysis time is 4-6 hours, and the waste heat coil is matched to maintain the fermentation temperature at 35-38℃.

4. The grain harvesting straw comprehensive utilization system according to claim 1, characterized in that, The biogas purification and liquefaction module is equipped with a dry desulfurization tower, a hollow fiber membrane separation device, and a single-stage mixed refrigerant liquefaction system in sequence. The H2S removal rate of the desulfurization tower is ≥99.9%, the CH4 recovery rate of the membrane separation device is ≥90%, and the purity of LNG after liquefaction is ≥99.5%.

5. A comprehensive utilization system for grain harvesting straw according to claim 1, characterized in that, The mobile grain harvesting and drying module includes a drying cylinder (10), which is inclined. The two ends of the drying cylinder (10) are the feeding end and the discharging end, respectively. Grain fed into the drying cylinder (10) through the feeding end can be moved to the discharging end for discharge. The drying cylinder (10) includes an outer shell (101) and an inner shell (102) rotatably connected to the inner wall of the outer shell (101). The outer shell (101) and the inner shell (102) are coaxially arranged. The inner shell (102) has an inner cavity for carrying grain. The feeding end and the discharging end of the drying cylinder (10) are respectively equipped with a feeding component (11) and a discharging component (12). The drying drum (10) has multiple drying mechanisms (20) arranged equidistantly inside. Each drying mechanism (20) includes multiple top plates (210) arranged equidistantly. The multiple top plates (210) are arranged in a ring inside the inner shell (102). Two side frames (211) are symmetrically fixed on the side of the top plate (210) facing the axis of the inner shell (102). A lifting element (212) is provided between the two side frames (211). The lifting element (212) can collect and scatter the grain for drying.

6. A comprehensive utilization system for grain harvesting straw according to claim 5, characterized in that, The lifting component (212) includes a limiting plate (2120) fixed between two side frames (211). The bottom of the limiting plate (2120) is provided with a rotatable bearing plate (2121). The bearing plate (2121) has a concave cavity on the side away from the axis of the inner shell (102) to support the grain. A connecting shaft (2122) is installed on the opposite side of the bearing plate (2121) and the limiting plate (2120). Both ends of the connecting shaft (2122) are rotatably connected to the side frame (211). The connecting shaft (2122) is used to drive the bearing plate (2121) to rotate.

7. A comprehensive utilization system for grain harvesting straw according to claim 6, characterized in that, The drying mechanism (20) further includes a delay component (22), which includes a top column (2201) fixed to the top of the top plate (210), multiple sliding openings (2202) on the inner wall of the inner shell (102) and a receiving groove (2203) connected to the sliding openings (2202), the sliding openings (2202) and the receiving grooves (2203) are one-to-one, and the sliding openings (2202) are one-to-one with the top plate (210), and the top column (2201) is slidably connected inside the corresponding sliding opening (2202). A first drive shaft (2210) is provided on one side of the top column (2201), and a connecting block (2211) is installed between the first drive shaft (2210) and the top column (2201). A first slide rail (2213) is provided on the first drive shaft (2210), and the first drive shaft (2210) is slidably connected inside the first slide rail (2213).

8. A comprehensive utilization system for grain harvesting straw according to claim 7, characterized in that, The drying mechanism (20) further includes a compression assembly (23), which includes a second drive shaft (2301) rotatably connected to the inner wall of the side frame (211), and one end of the first drive shaft (2210) extending into the side frame (211) is fixed to one end of the drive shaft (2301). A connecting plate (2310) is provided on one side of the second drive shaft (2301), and a transmission component is connected between the connecting plate (2310) and the second drive shaft (2301) to drive the second drive shaft (2301) to rotate.

9. A comprehensive utilization system for grain harvesting straw according to claim 8, characterized in that, The top of the connecting plate (2310) is fixed with a lifting column (2311). The lifting column (2311) extends through the side frame (211) and the top column (2201) into the receiving groove (2203). One end of the lifting column (2311) is fixed with a first linkage shaft (2312). The inner wall of the receiving groove (2203) is provided with a second slide rail (2313), and the second slide rail (2313) is inclined. The first linkage shaft (2312) is slidably connected to the inside of the second slide rail (2313).

10. A comprehensive utilization system for grain harvesting straw according to claim 6, characterized in that, The drying mechanism (20) also includes a dispersing component (24), which includes a rotating shaft (2401) symmetrically arranged on a limiting plate (2120). The limiting plate (2120) has symmetrical arc grooves (2402), and the bottom of the rotating shaft (2401) is rotatably connected to the inner bottom wall of the corresponding arc groove (2402). A soft strip (2403) is fixed on the outer wall of the rotating shaft (2401), and the rotating shaft (2401) can rotate to make the soft strip (2403) rub the grain.

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