A granulator feeder for straw production of biomass fuel

Abstract

The application discloses a granulator feeder for straw production of biomass fuel, which comprises a feeding cylinder, a conical guide part is formed at the lower part of the feeding cylinder, a connecting pipe connected with the granulator is arranged at the bottom of the guide part, an opening is arranged at the upper end of the feeding cylinder, a cylinder cover is detachably matched with the opening, a mixing shaft is rotatably matched with the axis of the cylinder cover, a speed reducer is installed above the cylinder cover, a motor is connected with the input end of the speed reducer, the output end of the speed reducer is connected with the mixing shaft, a rotary shell is rotatably matched with the outside of the feeding cylinder, and the device can be installed at the feeding position of the granulator, the straw residues can be stored according to categories, then the residues are discharged in batches for mixing, and the mixed residues are directly conveyed to the granulator, so that the secondary transfer is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to a granulator feeder for straw production of biomass fuel. BACKGROUND

[0002] Common biomass includes agricultural waste, oil crops, industrial organic waste, wood processing waste, animal manure, etc. Biomass has high reserves and is renewable, and the carbon dioxide released by combustion is almost equal to the carbon dioxide absorbed by photosynthesis during growth, so the carbon dioxide generated during combustion of biomass fuel can be considered as zero. Therefore, effective and sufficient conversion of biomass fuel not only solves the problems of resource waste and pollution, but also meets the fuel demand in rural areas.

[0003] Agricultural waste is mainly straw, including sugarcane residue, sorghum straw, cassava residue, corn straw, etc.

[0004] When such agricultural waste is made into biomass fuel, it needs to be dried and crushed, and then mixed according to a certain proportion. Anti-coking agents and functional additives can be added before granulation as needed.

[0005] In the prior art, the above-mentioned mixing step requires a separate mixer. When using such a mixer, the materials are put into the mixer according to the proportion, and then transported to the feeder after mixing is completed, and then fed to the granulator through the feeder.

[0006] The above operation mode has the following disadvantages:

[0007] The quality of various types of straw residues is different. In the traditional technology, the mixer adds materials one by one, which leads to uneven input of materials and requires longer mixing time to mix the materials uniformly, resulting in slow mixing efficiency and high mixing energy consumption.

[0008] After the straw residue is mixed, it needs to be transported to the feeder and lifted to the granulator through the feeder. In this process, the composition of the straw residue changes during transportation, i.e. the heavier residue sinks, resulting in uneven material structure and uneven combustion of the final biomass fuel. In addition, in order to ensure the continuous operation of the granulator, a large amount of mixed material residue needs to be prepared for storage, and the composition of the material residue changes during storage.

[0009] Based on the above problems, we designed a granulator feeder for straw production of biomass fuel which can be installed at the feeding position of the granulator, can store the straw residue according to the type, then mix it in batches, and then directly feed the mixed residue to the granulator, avoiding the secondary transportation of the straw residue. SUMMARY

[0010] The technical problem solved by the present application is to provide a granulator feeder for biomass fuel production, which can be installed at the feeding position of a granulator, can store straw residues according to categories, then feed the residues in batches for mixing, and directly deliver the mixed residues to the granulator, thereby avoiding secondary transportation.

[0011] To solve the above problems, the present application adopts the following technical solutions:

[0012] The granulator feeder for biomass fuel production comprises a feeding cylinder, a conical guide part is formed at the lower part of the feeding cylinder, a connecting pipe connected to the granulator is arranged at the bottom of the guide part, an opening is arranged at the upper end of the feeding cylinder, a cylinder cover is detachably matched with the opening, a mixing shaft is rotatably matched with the axis of the cylinder cover, a speed reducer is arranged above the cylinder cover, a motor is connected to the input end of the speed reducer, the output end of the speed reducer is connected to the mixing shaft, a rotary shell is rotatably matched with the outside of the feeding cylinder, a feeding hole is arranged at the outer wall of the feeding cylinder and located inside the rotary shell, a plurality of assembly holes are annularly arranged at the outer wall of the rotary shell, an inclined pipe is assembled through the assembly holes, an arc-shaped groove is formed at one end of the inclined pipe, the arc-shaped groove is gap-matched with the feeding cylinder, the gap is less than 1 mm, the end of the inclined pipe away from the feeding cylinder is vertically upward, a support is arranged at the outer wall of the feeding cylinder, a first motor is arranged on the support, and a bevel gear transmission unit is matched between the first motor and the rotary shell.

[0013] A self-rotating mixing barrel is arranged at the bottom of the self-rotating mixing barrel, the self-rotating mixing barrel is inserted into the inclined pipe and is rotatably matched with the inclined pipe, a first gear is arranged at the outer wall of the insertion pipe, a second gear is formed at the outer wall of the cylinder cover, the first gear is engaged with the second gear, and the self-rotating mixing barrel rotates along the inclined pipe with the rotation of the rotary shell.

[0014] A stirring rod is V-shaped and connected with the mixing shaft at both ends.

[0015] Preferably, an air duct is arranged inside the mixing shaft, the upper end of the air duct is closed, the lower end of the air duct penetrates downward through the mixing shaft, an expansion device is arranged at the lower part of the air duct, the expansion device is located in the connecting pipe, the expansion device rotates along the mixing shaft, the expansion device blocks the connecting pipe after inflation, an air inlet device is arranged at the outer wall of the mixing shaft and located above the cylinder cover, an air pump is arranged at the upper end of the cylinder cover, and a metal air pipe is arranged between the air pump and the air inlet device.

[0016] Preferably, the inflation device comprises an air bag and an air pipe, the lower end of the air duct is provided with a stepped hole, the upper end of the air bag is provided with an inflation nozzle, the inflation nozzle is embedded in the air pipe, a compression ring is screwed at the bottom of the air pipe, the compression ring clamps and fixes the inflation nozzle after being screwed, the upper end of the air pipe is inserted into the air duct, a bearing and a shaft seal are matched between the air pipe and the stepped hole, the air inlet device comprises an air inlet box, the air inlet box is coaxial with the mixing shaft, the mixing shaft passes through the air inlet box, a first bearing and a second shaft seal are matched between the air inlet box and the mixing shaft, the outer wall of the mixing shaft is provided with an air inlet hole at the position corresponding to the air inlet box, the outer wall of the air inlet box is provided with a pipe joint, and the metal air pipe is connected through the pipe joint; when the mixing shaft rotates, the air inlet box remains stationary.

[0017] Preferably, an outer ring portion is arranged at the outer top portion of the air pipe, and the outer ring portion is transitionally matched with the air duct.

[0018] Preferably, the outer wall of the compression ring is transitionally matched with the inner wall of the stepped hole.

[0019] Preferably, a ring-shaped elastic rubber gasket is embedded in the inner wall of the connecting pipe, the air bag is interference-fitted with the gasket after being inflated, the inner wall of the gasket is provided with an air chamber, and the air chamber is sealed.

[0020] Preferably, a conical material blocking cup is arranged in the interior of the feeding cylinder, the feeding hole is located above the conical material blocking cup, a material guide pipe is arranged at the bottom axial center of the conical material blocking cup, the material guide pipe is gap-fitted with the mixing shaft, the mixing shaft is provided with a spiral blade at the position corresponding to the material guide pipe, a liquid feeding pipe is arranged on the outer wall of the feeding cylinder, and the connection position of the liquid feeding pipe and the feeding cylinder is located below the conical material blocking cup.

[0021] Preferably, a scraper is mounted on the outer wall of the mixing shaft, the scraper is attached to the inner wall of the conical material blocking cup and also attached to the inner wall of the feeding cylinder.

[0022] Preferably, a connecting seat is arranged at the pipe wall of the inclined pipe, the connecting seat is coaxial with the self-rotating mixing barrel, a passive stirring shaft is inserted in the connecting seat, the passive stirring shaft is inserted upward into the self-rotating mixing barrel, and the passive stirring shaft is provided with a first stirring rod at the portion inserted into the self-rotating mixing barrel; a first spiral blade is arranged at the inner wall of the insertion pipe, and the first spiral blade is gap-fitted with the passive stirring shaft.

[0023] The beneficial effects of the present application are:

[0024] The device utilizes the rotation of the rotary shell to make the self-rotating mixing barrels storing different raw materials cooperate with the feeding hole one by one, and the material is transported into the feeding cylinder, and different materials can be sent into the feeding cylinder in turn by one rotation, and the input of the material is completed by multiple rotations, and since the input of the material is different each time, the material is divided into several times, and the material is more uniformly divided in the feeding cylinder, and the rotation of the mixing shaft realizes the further mixing of the material in the mixing cylinder, and the mixed material is directly sent into the feeding port of the granulator, so that the trouble of secondary transportation of the material is avoided, and the uneven structure of the material caused by the secondary transportation of the material is avoided.

[0025] The device utilizes the rotation of the rotary shell to make the self-rotating mixing barrels storing different raw materials cooperate with the feeding hole one by one, and the material is transported into the feeding cylinder, and different materials can be sent into the feeding cylinder in turn by one rotation, and the input of the material is completed by multiple rotations, and since the input of the material is different each time, the material is divided into several times, and the material is more uniformly divided in the feeding cylinder, and the rotation of the mixing shaft realizes the further mixing of the material in the mixing cylinder, and the mixed material is directly sent into the feeding port of the granulator, so that the trouble of secondary transportation of the material is avoided, and the uneven structure of the material caused by the secondary transportation of the material is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0026] 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 are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0027] Figure 1 The structure of the present application is shown in the figure;

[0028] Figure 2 The perspective view of the inclined pipe is shown in the figure;

[0029] Figure 3 The cross-sectional view of the device is shown in the figure;

[0030] Figure 4 The Figure 3 The enlarged view at A is shown in the figure;

[0031] Figure 5 The Figure 4 The enlarged view at B is shown in the figure;

[0032] Figure 6 The Figure 3 The enlarged view at C is shown in the figure;

[0033] Figure 7 The Figure 3 The enlarged view at D is shown in the figure;

[0034] Figure 8 The Figure 3 The enlarged view at E is shown in the figure. DETAILED DESCRIPTION

[0035] All of the features disclosed in this specification, and / or all of the steps of any methods disclosed, can be combined in any combination, except combinations where at least some of such features and / or steps are mutually exclusive.

[0036] Any feature in the described embodiments of the application that is explicitly claimed in any claim is also indirectly claimed in combination in any other features in the description and / or drawings.

[0037] In the description of the application, it should be understood that the terms "one end", "the other end", "outer side", "upper", "inner side", "horizontal", "coaxial", "central", "end", "length", "outer end" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the application.

[0038] In addition, in the description of the application, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0039] In the present application, unless otherwise explicitly specified and limited, the terms "provided", "sleeved", "connected", "penetrated", "inserted" and the like should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. Embodiment 1

[0040] Referring to Figure 1 , Figure 2 and Figure 3 , it comprises a feeding cylinder 1, a tapered guide part 2 is formed in the lower part of the feeding cylinder 1, a connecting pipe 21 connected to the granulator is arranged at the bottom of the guide part 2, an opening is arranged at the upper end of the feeding cylinder 1, a cylinder cover 11 is detachably matched at the opening, a mixing shaft 12 is rotatably matched at the shaft center of the cylinder cover 11, a speed reducer 3 is installed above the cylinder cover 11, a motor 31 is connected to the input end of the speed reducer 3, the output end of the speed reducer is connected to the mixing shaft 12, and further comprising,

[0041] A rotary shell 4 is rotationally fitted to the outside of the feeding cylinder 1. A feeding hole 13 is provided on the inside of the rotary shell 4 at the outer wall of the feeding cylinder 1. A plurality of assembly holes 41 are annularly provided on the outer wall of the rotary shell 4. A slanted pipe 42 is assembled through the assembly holes 41. An arc-shaped slot 441 is machined on one end of the slanted pipe 42. The arc-shaped slot is clearance-fitted with the feeding cylinder 1 with a clearance of less than 1 mm. The end of the slanted pipe 42 away from the feeding cylinder 1 is vertically upward. A support 14 is provided on the outer wall of the feeding cylinder 1. A first motor 15 is installed on the support 14. A bevel gear transmission unit 5 is fitted between the first motor 15 and the rotary shell 4. In this embodiment, the first motor 15 is a servo motor controlled by a PLC. The first motor 15 rotates for a fixed number of turns, stops for a certain period of time, and then rotates for a fixed number of turns again. In actual application, the first motor 15 rotates for a fixed number of turns, stops for 15 seconds with one of the slanted pipes 42 opposite to the feeding hole 13, and then rotates for a fixed number of turns again so that the feeding hole 13 is opposite to the next slanted pipe 42.

[0042] A self-rotating mixing barrel 6 is provided with a spigot 61 at the bottom. The spigot 61 is inserted into the slanted pipe 42 and rotationally fitted with the slanted pipe 42. A first gear 62 is installed on the outer wall of the spigot 61. A second gear 121 is machined on the outer wall of the cylinder cover 11. The first gear 62 is engaged with the second gear 121. With the rotation of the rotary shell 4, the self-rotating mixing barrel 6 rotates along the slanted pipe 42. The self-rotating mixing barrel 6 rotates by utilizing the rotation of the rotary shell 4, so that the material in the self-rotating mixing barrel 6 is reduced in solidification under the action of rotation, which is helpful for material falling.

[0043] A stirring rod 7 is V-shaped and connected with the mixing shaft 12 at both ends. The V-shaped stirring rod 7 forms a triangle with the mixing shaft 12, which increases the structural strength of the stirring rod 7. The inside of the stirring rod 7 can also pass through the material, which reduces the rotation damping of the mixing shaft 12.

[0044] In the above technical solution, the rotation of the rotary shell 4 makes the plurality of slanted pipes 42 rotate one by one opposite to the feeding hole 13. Each time, the material is uniformly transported into the feeding cylinder 1 with equal residence time. The material transported each time is different, which increases the uniformity of material mixing. Embodiment 2

[0045] Reference Figure 1 , Figure 3 , Figure 4 and Figure 5The inside of the mixing shaft 12 is provided with an air channel 122, the upper end of the air channel 122 is closed, the lower end penetrates the mixing shaft 12 downward, an expansion device 8 is arranged at the lower part of the air channel 122, the expansion device 8 is located in the connecting pipe 21, the expansion device 8 rotates along the mixing shaft 12, the expansion device 8 is inflated to block the connecting pipe 21, the outer wall of the mixing shaft 12 is provided with an air inlet device 9 above the barrel cover 11, an air pump 10 is installed at the upper end of the barrel cover 11, a metal air pipe 199 is installed between the air pump 10 and the air inlet device 9.

[0046] In the above technical solution, the expansion device 8 is inflated in the connecting pipe 21 to block the connecting pipe 21, during the mixing process, the material is prevented from being input into the granulator through the connecting pipe 21, and because of inflation, the sealing performance is high, and the leakage of liquid material can be avoided during the addition of liquid material.

[0047] In the above technical solution, the air pump 10 is used to send air, the air pump 10 with pressure maintaining function is selected, the air pump 10 stops working after inputting enough air pressure, and starts when the air pressure is insufficient, so that the expansion device 8 is always in the inflated state during the mixing process. Embodiment 3

[0048] As shown in Figure 1 , Figure 3 and Figure 6 The expansion device 8 includes an air bag 81 and an air pipe 82, the lower end of the air channel 122 is provided with a stepped hole 123, the upper end of the air bag 81 is provided with an inflation nozzle 83, the inflation nozzle 83 is embedded in the air pipe 82, a compression ring 84 is screwed into the bottom of the air pipe 82, the compression ring 84 clamps and fixes the inflation nozzle 83 after being screwed in, the upper end of the air pipe 82 is inserted into the air channel 122, bearings 85 and shaft seals 86 are matched between the air pipe 82 and the stepped hole 123, the air inlet device 9 includes an air inlet box 91, the air inlet box 91 is coaxial with the mixing shaft 12, and the mixing shaft 12 penetrates the air inlet box 91, first bearings 92 and second shaft seals 93 are matched between the air inlet box 91 and the mixing shaft 12, the outer wall of the mixing shaft 12 is provided with an air inlet hole 1223 corresponding to the position of the air inlet box 91, a pipe joint 94 is arranged on the outer wall of the air inlet box 91, and the metal air pipe 199 is connected through the pipe joint 94; when the mixing shaft 12 rotates, the air inlet box 91 remains stationary.

[0049] In the above technical solution, the air tube 82 is connected to the air bag 81 and the mixing shaft 12 in rotation, and a large frictional resistance is generated between the air tube 82 and the connecting pipe 21 after the air bag 81 is inflated. At this time, the air tube 82 rotates under the action of the bearing 85, without affecting the continuous rotation of the mixing shaft 12, and the rotation of the mixing shaft 12 does not drive the inflated air bag 81 to rotate, thereby avoiding the abrasion caused by the rotation of the air bag 81.

[0050] In the above technical solution, the air inlet box 91 is kept in place by the metal air tube 199. Embodiment 4

[0051] Referring to Figure 5 As shown in the drawings, an outer ring portion 811 is arranged at the outer top position of the air tube 82, and the outer ring portion 811 is in transition fit with the air passage 122.

[0052] In the above technical solution, the outer ring portion 811 is in transition fit with the air passage 122, which can reduce air leakage and the sealing pressure of the shaft seal 86 without affecting the rotation of the air tube 82. Embodiment 5

[0053] Referring to Figure 5 As shown in the drawings, the outer wall of the pressure ring 84 is in transition fit with the inner wall of the stepped hole 123.

[0054] In the above technical solution, the pressure ring 84 also has a certain sealing effect. When the sealing of the shaft seal is insufficient and air leakage occurs, the pressure ring 84 can assist in sealing. In order to avoid the passive loosening of the pressure ring 84, the tightening direction of the pressure ring 84 needs to be opposite to the rotation direction of the mixing shaft 12. Embodiment 6

[0055] Referring to Figure 4 As shown in the drawings, a ring-shaped gasket 87 made of elastic rubber material is embedded in the inner wall of the connecting pipe 21. The air bag 81 is in interference fit with the gasket 87 after inflation and expansion. The inner wall of the gasket 87 is provided with an air chamber 88, and the air chamber 88 is sealed.

[0056] In the above technical solution, the gasket 87 can elastically deform. First, the sealing after the cooperation with the air bag 81 is increased. Second, the frictional resistance generated by the contact between the rubbers is larger, which further avoids the rotation of the inflated air bag 81. Embodiment 7

[0057] Referring to Figure 3As shown, a conical material blocking cup 16 is arranged in the interior of the feeding cylinder 1, the feeding hole 13 is located above the conical material blocking cup 16, a material guiding pipe 17 is arranged at the bottom axis of the conical material blocking cup 16, the material guiding pipe 17 is in clearance fit with the mixing shaft 12, the mixing shaft 12 is provided with a spiral blade 171 at the position corresponding to the material guiding pipe 17, and a liquid feeding pipe 172 is arranged on the outer wall of the feeding cylinder 1, the connecting position of the liquid feeding pipe 172 and the feeding cylinder 1 is located below the conical material blocking cup 16.

[0058] In the above technical solution, the door adopts the conical material blocking cup 16, the material enters through the feeding hole 13 and falls onto the conical material blocking cup 16, and is concentrated at the mixing shaft 12 through the conical material blocking cup 16, and then is sent downward to the lower part of the feeding cylinder 1 through the material guiding pipe 17, and since the spiral blade 171 is arranged, the material can be prevented from being excessively stirred to the upper part of the feeding cylinder 1, so as to avoid affecting the material falling at the feeding hole 13. Secondly, the connecting position of the liquid feeding pipe 172 and the feeding cylinder 1 is located below the conical material blocking cup 16, so that the liquid material is prevented from entering above the conical material blocking cup 16 after entering, the conical material blocking cup 16 is kept dry, and the conical material blocking cup 16 is prevented from adhering to the material. Thirdly, after being separated by the conical material blocking cup 16, the material is more concentrated, and the materials are pressed against each other, so that the mixing effect is increased. Example 8

[0059] Referring to Figure 3 As shown, a scraper 1222 is installed on the outer wall of the mixing shaft 12, the scraper 1222 is attached to the inner wall of the conical material blocking cup 16, and is also attached to the inner wall of the feeding cylinder 1.

[0060] In the above technical solution, the material adhering to the inner wall of the conical material blocking cup 16 and the inner wall of the feeding cylinder 1 can be scraped off by the scraper 1222 rotating actively, so as to avoid the situation that the material remains, and it should be noted that the height of the upper end of the scraper 1222 needs to exceed the height of the feeding hole 13, so that the scraper 1222 can scrape off the material remaining at the feeding hole 13 when the mixing shaft 12 rotates. Example 9

[0061] Referring to Figure 3 and Figure 7As shown, a connecting seat 421 is arranged at the pipe wall of the inclined pipe 42, the connecting seat 421 is coaxial with the self-rotating mixing barrel 6, a passive stirring shaft 422 is inserted in the connecting seat 421, the passive stirring shaft 422 is inserted into the self-rotating mixing barrel 6 upwards, the part of the passive stirring shaft 422 inserted into the self-rotating mixing barrel 6 is provided with a first stirring rod 423; a first spiral piece 611 is arranged at the inner wall of the insertion pipe 61, the first spiral piece 611 is in clearance fit with the passive stirring shaft 422.

[0062] In the above technical scheme, the upper end of the passive stirring shaft 422 does not exceed the self-rotating mixing barrel 6, so as to avoid material scattering when feeding into the self-rotating mixing barrel 6.

[0063] In the above technical scheme, the passive stirring shaft 422 is designed, when the rotary shell 4 rotates along the feeding cylinder 1, the self-rotating mixing barrel 6 is rotated by the gear transmission characteristics, at this time, the fixed first stirring rod 423 can play a technical effect of mixing and dispersing the material. In combination with the first spiral piece 611, the material in the self-rotating mixing barrel 6 is transported downwards into the inclined pipe 42 through the first spiral piece 611 in the process of rotating the self-rotating mixing barrel 6, when the inclined pipe 42 rotates to be opposite to the feeding hole 13, the material enters into the feeding cylinder 1 through the feeding hole 13. The situation of material solidification in the self-rotating mixing barrel 6 is effectively reduced.

[0064] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, the above embodiments and descriptions in the specification are only to illustrate the principle of the present application, various changes and improvements can be made without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A granulator feeder for straw production of biomass fuel, comprising a feeding cylinder (1), a tapered guide part (2) is formed in the lower part of the feeding cylinder (1), a connecting pipe (21) connected with a granulator is arranged at the bottom of the guide part (2), an opening is arranged at the upper end of the feeding cylinder (1), a cylinder cover (11) is detachably matched with the opening, a mixing shaft (12) is rotatably matched with the axis of the cylinder cover (11), a speed reducer (3) is installed above the cylinder cover (11), a motor (31) is connected with the input end of the speed reducer (3), and the output end of the speed reducer (3) is connected with the mixing shaft (12), characterized in that: Also include, The rotary shell (4) is matched with the outside of the feeding cylinder (1), a feeding hole (13) is arranged on the inside of the rotary shell (4) at the outer wall of the feeding cylinder (1), a plurality of assembly holes (41) are arranged annularly on the outer wall of the rotary shell (4), an inclined pipe (42) is assembled through the assembly hole (41), one end of the inclined pipe (42) is processed with an arc-shaped groove (441), the arc-shaped groove is matched with the feeding cylinder (1) with a gap, the gap is less than 1mm, the end of the inclined pipe (42) away from the feeding cylinder (1) is vertically upward, a support (14) is arranged at the outer wall of the feeding cylinder (1), a first motor (15) is installed on the support (14), a bevel gear transmission unit (5) is matched between the first motor (15) and the rotary shell (4), The self-rotating mixing barrel (6) is provided with a plug pipe (61) at the bottom, the plug pipe (61) is inserted into the inclined pipe (42) and is matched with the inclined pipe (42) in rotation, a first gear (62) is installed on the outer wall of the plug pipe (61), a second gear (121) is processed on the outer wall of the cylinder cover (11), the first gear (62) is engaged with the second gear (121), and the self-rotating mixing barrel (6) rotates along the inclined pipe (42) with the rotation of the rotary shell (4), The stirring rod (7) is V-shaped, and the two ends of the stirring rod (7) are connected with the mixing shaft (12); Wherein, the inside of the mixing shaft (12) is provided with an air channel (122), the upper end of the air channel (122) is closed, the lower end penetrates the mixing shaft (12) downward, an expansion device (8) is arranged at the lower part of the air channel (122), the expansion device (8) is located in the connecting pipe (21), the expansion device (8) rotates along the mixing shaft (12), the expansion device (8) blocks the connecting pipe (21) after inflation, the outer wall of the mixing shaft (12) is provided with an air inlet device (9) above the cylinder cover (11), an air pump (10) is installed on the upper end of the cylinder cover (11), a metal air pipe (199) is installed between the air pump (10) and the air inlet device (9); The inflation device (8) comprises an air bag (81) and an air pipe (82), the lower end of the air duct (122) is provided with a stepped hole (123), the upper end of the air bag (81) is provided with an inflation nozzle (83), the inflation nozzle (83) is embedded in the air pipe (82), a compression ring (84) is screwed at the bottom of the air pipe (82), the compression ring (84) clamps and fixes the inflation nozzle (83) after being screwed, the upper end of the air pipe (82) is inserted into the air duct (122), a bearing (85) and a shaft seal (86) are matched between the air pipe (82) and the stepped hole (123), the air inlet device (9) comprises an air inlet box (91), the air inlet box (91) is coaxial with the mixing shaft (12), and the mixing shaft (12) penetrates through the air inlet box (91), a first bearing (92) and a second shaft seal (93) are matched between the air inlet box (91) and the mixing shaft (12), the outer wall of the mixing shaft (12) is provided with an air inlet hole (1223) at the position corresponding to the air inlet box (91), the outer wall of the air inlet box (91) is provided with a pipe joint (94), and the metal air pipe (199) is connected through the pipe joint (94); when the mixing shaft (12) rotates, the air inlet box (91) remains stationary. A connecting seat (421) is arranged at the pipe wall of the inclined pipe (42), the connecting seat (421) is coaxial with the self-rotating mixing barrel (6), a passive stirring shaft (422) is inserted in the connecting seat (421), the passive stirring shaft (422) is inserted upward into the self-rotating mixing barrel (6), and the first stirring rod (423) is arranged at the part of the passive stirring shaft (422) inserted into the self-rotating mixing barrel (6); the first spiral piece (611) is arranged at the inner wall of the cannula (61), and the first spiral piece (611) is gap-fitted with the passive stirring shaft (422).

2. The granulator feeder for straw production of biomass fuel according to claim 1, characterized in that: An outer ring part (811) is arranged at the outer top position of the air pipe (82), and the outer ring part (811) is transition-fitted with the air duct (122).

3. The straw granulator feeder for producing biomass fuel according to claim 2, characterized in that: The outer wall of the compression ring (84) is transition-fitted with the inner wall of the stepped hole (123).

4. The straw granulator feeder for producing biomass fuel according to claim 3, characterized in that: A gasket (87) made of elastic rubber material is embedded in the inner wall of the connecting pipe (21), the air bag (81) is interference-fitted with the gasket (87) after inflation and expansion, the inner wall of the gasket (87) is provided with an air chamber (88), and the air chamber (88) is sealed.

5. The straw biomass fuel pelletizer feeder of claim 1, wherein: A conical material blocking cup (16) is arranged inside the feeding cylinder (1), the feeding hole (13) is located above the conical material blocking cup (16), a material guiding pipe (17) is arranged at the bottom axial center of the conical material blocking cup (16), the material guiding pipe (17) is in clearance fit with the mixing shaft (12), the mixing shaft (12) is provided with a spiral blade (171) at the position corresponding to the material guiding pipe (17), a liquid feeding pipe (172) is arranged on the outer wall of the feeding cylinder (1), and the connecting position of the liquid feeding pipe (172) and the feeding cylinder (1) is located below the conical material blocking cup (16).

6. The straw granulator feeder for producing biomass fuel according to claim 5, characterized in that: A scraper (1222) is arranged on the outer wall of the mixing shaft (12), the scraper (1222) is attached to the inner wall of the conical material blocking cup (16) and also attached to the inner wall of the feeding cylinder (1).

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