Feeding device of large biomass baking furnace

Abstract

The invention discloses a large biomass baking furnace feeding device, which belongs to the field of biomass dry distillation, and comprises a first feeding part and a second feeding part, the first feeding part comprises a first shell, a first feeding part rotationally connected into the first shell, a first gas interlayer formed in the first shell, a first exhaust end, a first gas inlet end, a first feeding port and a first discharging port, wherein the first exhaust end and the first gas inlet end are formed in the upper end and the lower end of the first shell correspondingly and communicate with the first gas interlayer, and the first feeding port and the first discharging port are formed in the upper end and the lower end of the first shell correspondingly. The first driving part is used for driving the first feeding part to rotate; after two-stage low-temperature treatment, part of moisture and part of oligomer in straw fibers are removed, cellulose and lignin networks are shrunk, materials become brittle, the temperature and humidity gradients inside and on the surface of the materials are reduced, the materials almost reach a physical equilibrium state before entering a main furnace, reaction is more uniform, and therefore temperature fluctuation of equipment is remarkably reduced.

Description

Technical Field

[0001] The present invention relates to the field of biomass dry distillation, and more particularly to a feeding device for a large-scale biomass baking furnace. Background Art

[0002] In the process of biomass energy utilization, straw is one of the most common and cheapest solid raw materials. Before pyrolysis, gasification and combustion of straw, it needs to be baked. Straw baking refers to a pretreatment technology in which straw is slowly pyrolyzed in the temperature range of 200-300°C under anaerobic or anoxic conditions to produce a small amount of gas and liquid products. After baking, the activation energy, calorific value and energy density of straw can be increased, the grindability and hydrophobicity of biomass can be improved, the volatile matter content can be reduced, the fixed carbon content can be increased, and its combustion performance can be significantly improved.

[0003] When baking straw, there are strict requirements on the oxygen content, and air cannot enter during feeding. To solve this problem, the existing technology (Chinese invention patent with announcement number CN115368924B) discloses a large-scale biomass baking furnace feeding system, which adopts a piston feeding method. Although the sealing of the feed can be controlled, the moisture content of the straw that has not been pre-distilled is relatively high. Once it directly enters the main pyrolysis zone of 200-300°C, the water vapor evaporates instantly and absorbs heat, causing the furnace temperature to drop rapidly, resulting in large fluctuations in the temperature climbing curve. More frequent re-firing or adjustment of the heat source is required, which increases the burden on the control system. Summary of the Invention

[0004] In view of the problems existing in the prior art, the object of the present invention is to provide a feeding device for a large biomass baking furnace.

[0005] To solve the above problems, the present invention adopts the following technical solutions.

[0006] A large biomass baking furnace feeding device includes a first feeding part and a second feeding part.

[0007] The first feeding part includes a shell body, a first feeding part rotatably connected to the inside of the shell body, a gas interlayer 1 provided in the inside of the shell body, an exhaust end 1 and an inlet end 1 provided at the upper end and the lower end of the shell body and connected to the gas interlayer, a feeding port 1 and a discharging port 1 provided at the upper end and the lower end of the shell body, and a driving part 1 for driving the first feeding part to rotate;

[0008] The second feeding part includes a second shell, a second feeding part rotatably connected to the inside of the second shell, a second gas interlayer provided inside the second shell, a second exhaust end and a second gas inlet end respectively provided at the upper end and the lower end of the second shell and connected to the second gas interlayer, a second feeding port and a second discharging port respectively provided at the upper end and the lower end of the second shell, and a second driving part for driving the second feeding part to rotate;

[0009] A rotary valve is fixedly connected between the second feed port and the first discharge port and at the lower end of the second discharge port. The first air inlet end and the second air outlet end are connected via a gas transmission connection portion.

[0010] Furthermore, a volatile discharge port is provided at the second upper end of the shell, and a support portion is fixedly connected to the second upper end of the shell.

[0011] Furthermore, the gas transmission connection part includes a pipe body whose two ends are respectively fixed to the exhaust end 2 and the intake end 1, a heating sleeve fixed to the outside of the pipe body, a heat conductive part fixed to the inner wall of the pipe body and connected to the heating sleeve to realize heat conduction, and a sensor fixed to the inner wall of the pipe body.

[0012] Furthermore, a plurality of auger blades are distributed on the outer surface of the first feeding part, and the plurality of auger blades are divided into a loose feeding section, a disturbed feeding section, and a compressed feeding section according to different spacings between the blades. The disturbed feeding section is located between the loose feeding section and the compressed feeding section, and the loose feeding section is close to the feed port 1, and the compressed feeding section is close to the discharge port 1.

[0013] Furthermore, a plurality of through slots are opened at the upper end of the shell, and a plurality of spoiler columns are fixedly inserted into the plurality of through slots, one end of the plurality of spoiler columns respectively extends between the plurality of blades of the disturbance feeding section, and an electric heating part is fixedly connected to the upper end of the shell, and the heat conduction end of the electric heating part is fixedly connected to the other end of the plurality of spoiler columns.

[0014] Furthermore, the second feeding part includes a first feeding screw and a second feeding screw rotatably connected to the inside of the second shell, and the multiple auger blades on the surface of the first feeding screw extend between the multiple auger blades on the surface of the second feeding screw. When the first feeding screw and the second feeding screw rotate, they can continuously stir the material between the multiple auger blades.

[0015] Furthermore, a hollow cavity is provided inside the first feeding part, the first feeding screw and the second feeding screw, and the driving part includes a motor 1 fixed to the upper end of the shell 1, a side plate 1 fixed to one side of the shell 1, a gear 1 rotatably connected to one side of the side plate 1, a rotary joint 1 fixed to the inside of the side plate 1, a gear 2 rotatably connected to one side of the shell 1 and fixed to the outside of the inner tube of the rotary joint 1, and a rotary joint 2 fixed to one side of the shell 1, and the inner tubes of the rotary joint 1 and the rotary joint 2 both pass through the shell 1 and are inserted into the hollow cavity in the first feeding part, the gear 1 is meshed with the gear 2, and the output shaft of the motor 1 is connected to the gear 1.

[0016] Furthermore, the driving part 2 includes a motor 2 fixed to the upper end of the shell 2, a side plate 2 fixed to one side of the shell 2, a gear 3 rotatably connected to one side of the side plate 2, two rotary joints 3 fixed to the inside of the side plate 2, two gears 4 rotatably connected to one side of the shell 2 and respectively fixed to the outside of the inner tubes of the two rotary joints 3, and two rotary joints 4 fixed to one side of the shell 2, and the inner tubes of the two rotary joints 3 and the two rotary joints 4 all pass through the shell 2 and are inserted into the hollow cavity in the first feeding screw and the second feeding screw, the gear 3 is meshed with one of the gears 4, the two gears 4 are meshed, and the output shaft of the motor 2 is connected to the gear 3.

[0017] Furthermore, a through slot 2 is provided at the upper end of the shell, and a groove connected to the through slot 2 is also provided inside the shell. A fan-shaped nozzle is fixed inside the groove, and the input end of the fan-shaped nozzle extends outward from the through slot 2 and is connected to the liquid supply part.

[0018] Furthermore, the liquid supply part includes a pump body fixedly connected to an upper end of the shell and a liquid storage tank fixedly connected to one side of the shell, the input end of the pump body is inserted into the liquid storage tank and the output end of the pump body is connected to the input end of the fan-shaped nozzle.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] (1) This scheme adopts a two-stage feeding method. The free water and part of the bound water in the wet straw can be removed through the first feeding part, which absorbs less heat. The bound water and light volatiles are further removed through the second feeding part. The straw is dehydrated in two stages from the feeding device and then enters the main furnace. The temperature drop is greatly reduced, and the PID adjustment is more stable. After two-stage low-temperature treatment, part of the water and part of the oligomers in the straw fiber are removed, the cellulose and lignin network "shrinks" and makes the material brittle, and the temperature and humidity gradient inside and on the surface of the material is reduced. Before entering the main furnace, it almost reaches a "physical equilibrium" state, the reaction is more uniform, and the temperature fluctuation of the equipment is significantly reduced.

[0021] (2) This solution can break the dead zone of the first feeding part during the straw feeding process by inserting a spoiler column into the shell. The two feeding screws of the second feeding part can make the material fully turned over and mixed in layers on the cross section. The temperature difference between the interior and the surface and the residence time difference between large pieces and small pieces are greatly reduced. The spoiler column and the second feeding part can disturb the straw during the transportation process and continuously change the transportation path of the material. In this way, both the center and the surface of the material can repeatedly receive approximately the same heat input, and the wet straw in the feeding device can be pre-distilled more evenly, thereby reducing the temperature gradient inside and outside the material.

[0022] (3) In this scheme, the interior of the second feeding part, the first feeding screw and the second feeding screw are all hollow, and rotary joints are installed on both sides of the shell one and the shell two. The hot fluid is fed into the interior of the second feeding part, the first feeding screw and the second feeding screw through the rotary joints, and heat is transferred from the outer surface of the screw to the inside of the straw fiber. The heat transfer coefficient is greatly improved by working together with the heat conduction of the inner wall of the shell one and the shell two. The superposition of internal and external heating can make the material temperature reach the target temperature faster, and the residence time of the material in the screw barrel can be shortened accordingly, thereby improving the production capacity, realizing the coordinated heating of the inside and outside, and the highly uniform temperature field, and improving the pre-distillation efficiency and quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a structural schematic diagram of the driving part 1 and the first feeding part of the present invention;

[0025] Figure 3 This is a schematic structural diagram of the gas transmission connection portion of the present invention;

[0026] Figure 4 This is a schematic structural diagram of the second driving part and the second feeding part of the present invention;

[0027] Figure 5 This is a schematic structural diagram of the through slot 1 and the through slot 2 of the present invention;

[0028] Figure 6 Schematic diagram of the groove and spoiler structure of the present invention;

[0029] Figure 7 This is a schematic diagram of the fan-shaped nozzle and structure of the present invention;

[0030] Figure 8 It is a schematic structural diagram of the pump body and liquid storage tank of the present invention.

[0031] Description of the numbers in the figure:

[0032] 1. First feeding section; 11. Feed port 1; 12. Exhaust port 1; 13. Intake port 1; 14. First feeding section; 141. Loose feeding section; 142. Disturbance feeding section; 143. Compression feeding section; 15. Shell 1; 2. Second feeding section; 21. Exhaust port 2; 22. Intake port 2; 23. Feed port 2; 24. Second feeding section; 241. First feeding screw; 242. Second feeding screw; 25. Shell 2; 26. Volatile exhaust port; 3. Rotary valve; 4. Gas connection; 41. Pipe; 42. Add Heat-conducting sleeve; 43. Heat-conducting part; 44. Sensor; 5. Driving part 1; 51. Motor 1; 52. Side plate 1; 53. Gear 1; 54. Gear 2; 55. Rotary joint 1; 56. Rotary joint 2; 6. Driving part 2; 61. Motor 2; 62. Side plate 2; 63. Gear 3; 64. Gear 4; 65. Rotary joint 3; 66. Rotary joint 4; 7. Through slot 1; 71. Turbine column; 72. Electric heating part; 8. Through slot 2; 81. Groove; 82. Fan-shaped nozzle; 83. Pump body; 84. Liquid storage tank; 9. Support part. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0034] See also Figures 1 to 8 A large biomass roasting furnace feeding device includes a first feeding part 1 and a second feeding part 2.

[0035] The first feeding part 1 includes a shell 15, a first feeding part 14 rotatably connected to the inside of the shell 15, a gas interlayer 1 provided in the inside of the shell 15, an exhaust end 12 and an intake end 13 respectively provided at the upper and lower ends of the shell 15 and connected to the gas interlayer, a feeding port 11 and a discharging port 1 respectively provided at the upper and lower ends of the shell 15, and a driving part 5 for driving the first feeding part 14 to rotate;

[0036] The second feeding part 2 includes a second shell 25, a second feeding part 24 rotatably connected to the inside of the second shell 25, a second gas interlayer opened inside the second shell 25, a second exhaust end 21 and a second gas inlet end 22 respectively opened at the upper end and the lower end of the second shell 25 and connected to the second gas interlayer, a second feeding port 23 and a second discharging port respectively opened at the upper end and the lower end of the second shell 25, and a second driving part 6 for driving the second feeding part 24 to rotate;

[0037] A rotary valve 3 is fixedly connected between the second feed port 23 and the first discharge port and at the lower end of the second discharge port. The first air inlet end 13 and the second air outlet end 21 are connected via a gas transmission connection portion 4.

[0038] The upper end of the second shell 25 is provided with a volatile discharge port 26 , and the upper end of the second shell 25 is also fixedly connected to a support portion 9 .

[0039] The gas transmission connection part 4 includes a tube body 41 whose two ends are respectively fixed to the exhaust end 21 and the intake end 13, a heating sleeve 42 fixed to the outside of the tube body 41, a heat conducting part 43 fixed to the inner wall of the tube body 41 and connected to the heating sleeve 42 to realize heat conduction, and a sensor 44 fixed to the inner wall of the tube body 41.

[0040] By adopting the above technical solution, the exhaust gas discharged from the baking oven can enter the interlayer of the shell 2 25 from the air inlet end 22, and pre-dry distill the material in the shell 2 25. The exhaust gas in the shell 2 25 is discharged from the exhaust end 21 and enters the air inlet end 13 through the pipe body 41. When the exhaust gas passes through the pipe body 41, the exhaust gas temperature is detected by the sensor 44. When the exhaust gas temperature does not reach the preset temperature, the heating jacket 42 is controlled to work so that the heat conducting part 43 is heated and the exhaust gas is heated. After the exhaust gas reaches the preset temperature, it enters the shell 15. The gas with a certain temperature enters the interlayer inside the shell 15 from the air inlet end 13. In the process, the gas heats the material on the inner wall of the shell 15 in the interlayer, and the wet straw enters the shell 15 from the feed port 11. The driving part 5 works to drive the first feeding part 14 to rotate, and the first feeding part 14 rotates to transport the wet straw. During the movement of the wet straw inside the shell 15, the heat on the inner wall of the shell 15 can preheat the wet straw. The free water and part of the bound water of the wet straw can be removed through the first feeding part 1, and the heat absorption is less. After being heated, the wet straw is discharged from the discharge port 1 and enters the rotary valve 3 (the rotary valve 3 can be used to realize continuous transportation of materials and keep each zone relatively closed and the pressure difference controllable. In the mature existing technology, which will not be described here, the material passes through the rotary valve 3 and then enters the shell 25 through the feed port 23. The driving part 26 drives the second feeding part 24 to rotate to transport the material. The gas heats the material on the inner wall of the shell 25 in the interlayer inside the shell 25. During the movement of the material inside the shell 25, it can exchange heat with the inner wall of the shell 25. The shell 22 can realize pre-drying of the material. After pre-drying, it is discharged from the discharge port of the shell 25. The discharged material passes through the rotary valve 3 and then enters the baking furnace. The bound water and light volatility of the material are further removed through the second feeding part 2. The straw enters the main furnace after two stages of dehydration, the temperature drop is greatly reduced, the PID adjustment is more stable, and after two-stage low-temperature treatment, part of the moisture and part of the oligomers in the straw fiber are removed, the cellulose and lignin networks "shrink" and make the material brittle, the temperature and humidity gradient inside and on the surface of the material are reduced, and it almost reaches a "physical equilibrium" state before entering the main furnace, the reaction is more uniform, and the temperature fluctuation of the equipment is significantly reduced. The volatile exhaust port 26 at the upper end of the shell 25 is externally connected to a negative pressure device, which can extract the gas inside the shell 25 and the volatiles generated during the pre-distillation process of the material in the shell 25 out of the shell 25.

[0041] like Figure 2-Figure 7As shown, a plurality of auger blades are distributed on the outer surface of the first feeding part 14, and the plurality of auger blades are divided into a loose feeding section 141, a disturbed feeding section 142, and a compressed feeding section 143 according to different spacings between the blades. The disturbed feeding section 142 is located between the loose feeding section 141 and the compressed feeding section 143, and the loose feeding section 141 is close to the feed port 11, and the compressed feeding section 143 is close to the discharge port 1.

[0042] The upper end of the shell 15 is provided with a plurality of through slots 7, and a plurality of spoiler columns 71 are fixedly inserted into the interior of the plurality of through slots 7. One end of the plurality of spoiler columns 71 extends respectively into between the plurality of blades of the disturbance feeding section 142. The upper end of the shell 15 is fixedly connected to an electric heating part 72, and the heat conduction end of the electric heating part 72 is fixedly connected to the other end of the plurality of spoiler columns 71.

[0043] The second feeding part 24 includes a first feeding screw 241 and a second feeding screw 242 which are rotatably connected to the inside of the shell 25, and the multiple auger blades on the surface of the first feeding screw 241 extend between the multiple auger blades on the surface of the second feeding screw 242. When the first feeding screw 241 and the second feeding screw 242 rotate, they can continuously stir the material between the multiple auger blades.

[0044] By adopting the above technical solution, the material enters the shell 15, and the first feeding part 14 rotates to drive the material to move in the shell 15. The material is in a loose moving state in the loose feeding section 141 area. When the material enters the disturbing feeding section 142, since the spoiler column 71 is inserted between the two adjacent auger blades of the disturbing feeding section 142, the spoiler column 71 can turn over the material between the two adjacent auger blades, thereby breaking the dead zone of the first feeding part 14 in the process of feeding the straw, so that the material on the outer surface of the first feeding part 14 and the material near the internal area are fully moved, and the temperature difference between the inside and the surface of the material and the residence time difference between large pieces and small pieces are greatly reduced. At the same time, the spoiler column 71 can be heated by the electric heating part 72, and the spoiler column 71 is heated by heat conduction The stirred material is heated in this way to improve the dehydration effect of the material. When the material enters the compression feeding section 143, the compression feeding section 143 compresses and conveys the material, and can squeeze out part of the gas in the material. When the material enters the shell 25, the first feeding screw 241 and the second feeding screw 242 rotate. The two feeding screws can make the material fully turned over and mixed in layers on the cross section. While conveying the material, the material can also be stirred. The straw can be disturbed during the conveying process through the spoiler column 71 and the second feeding part 24, and the conveying path of the material can be continuously changed. In this way, both the center and the surface of the material can repeatedly receive approximately the same heat input, and the wet straw in the feeding device can be pre-distilled more evenly, thereby reducing the temperature gradient inside and outside the material.

[0045] like Figure 2-Figure 4 As shown, a hollow cavity is provided inside the first feeding part 14, the first feeding screw 241 and the second feeding screw 242, and the driving part 5 includes a motor 51 fixed to the upper end of the shell 15, a side plate 52 fixed to one side of the shell 15, a gear 53 rotatably connected to one side of the side plate 52, a rotary joint 55 fixed to the inside of the side plate 52, a gear 2 54 rotatably connected to one side of the shell 15 and fixed to the outside of the inner tube of the rotary joint 55, and a rotary joint 2 56 fixed to one side of the shell 15, and the inner tubes of the rotary joint 55 and the rotary joint 2 56 both pass through the shell 15 and are inserted into the hollow cavity in the first feeding part 14, the gear 1 53 is meshed with the gear 2 54, and the output shaft of the motor 51 is connected to the gear 1 53.

[0046] The driving part 2 6 includes a motor 2 61 fixed to the upper end of the shell 2 25, a side plate 2 62 fixed to one side of the shell 2 25, a gear 3 63 rotatably connected to one side of the side plate 2 62, two rotary joints 3 65 fixed to the inside of the side plate 2 62, two gears 4 64 rotatably connected to one side of the shell 2 25 and respectively fixed to the outside of the inner tubes of the two rotary joints 3 65, and two rotary joints 4 66 fixed to one side of the shell 2 25, and the inner tubes of the two rotary joints 3 65 and the two rotary joints 4 66 all pass through the shell 2 25 and are inserted into the hollow cavity in the first feeding screw 241 and the second feeding screw 242, the gear 3 63 is engaged with one of the gears 4 64, the two gears 4 64 are engaged, and the output shaft of the motor 2 61 is connected to the gear 3 63.

[0047] By adopting the above technical solution, high-temperature gas or high-temperature fluid can enter the first feeding part 14 from the rotary joint 1 55, and high-temperature gas or high-temperature fluid can enter the first feeding screw 241 and the second feeding screw 242 from the two rotary joints 3 65 respectively, so that the first feeding part 14, the first feeding screw 241, and the second feeding screw 242 have a certain temperature, and can conduct heat from the outer surface of the screw to the inside of the straw fiber, and work together with the heat conduction of the inner wall of the shell 15 and the shell 2 25 to greatly improve the overall heat transfer coefficient. The superposition of internal and external heating can make the material temperature reach the target temperature faster, and the residence time of the material in the barrel can be shortened accordingly, thereby improving production capacity, realizing internal and external coordinated heating, highly uniform temperature field, and improving both pre-distillation efficiency and quality. The operation of motor 1 51 drives gear 1 53 and gear 2 54 to rotate, and the rotation of gear 2 54 drives the first feeding screw 241 to rotate; the operation of motor 2 61 drives gear 3 63 to rotate, and the rotation of gear 3 63 drives the two gears 4 64 to rotate, and the rotation of the two gears 4 64 drives the first feeding screw 241 and the second feeding screw 242 to rotate.

[0048] like Figure 5-Figure 8 As shown, a through slot 2 8 is provided at the upper end of the shell 15, and a groove 81 connected to the through slot 2 8 is also provided inside the shell 15. A fan-shaped nozzle 82 is fixed inside the groove 81, and the input end of the fan-shaped nozzle 82 extends outward from the through slot 2 8 and is connected to the liquid supply part.

[0049] The liquid supply part includes a pump body 83 fixedly connected to the upper end of the shell 15 and a liquid storage tank 84 fixedly connected to the side of the shell 15. The input end of the pump body 83 is inserted into the liquid storage tank 84 and the output end of the pump body 83 is connected to the input end of the fan-shaped nozzle 82.

[0050] By adopting the above technical solution, when the material is transported by the loose feeding section 141, the pump body 83 can work and pump the solution (0.5-1% H2O2 solution) in the liquid storage tank 84 to the fan-shaped nozzle 82, and the fan-shaped nozzle 82 sprays the solution on the surface of the material. H2O2 on the surface of the straw, especially when accompanied by trace metal ions (such as Fe 2+ ) is present, it can quickly decompose to produce hydroxyl radicals, which attack the ether bonds and C-C bonds of cellulose, hemicellulose and lignin, greatly damaging the cell wall structure. After the cell wall is partially broken, a large number of microcracks and new pores are generated inside the straw, which significantly increases the specific surface area and facilitates the penetration of pyrolysis gases. During the oxidation process, polar functional groups such as carbonyl and carboxyl are introduced on the fiber surface to increase its water adsorption rate. The increase in polar groups makes it easier for water to diffuse from the inside to the surface and evaporate during evaporation and drying, shortening the drying time and reducing the water removal load of the main pyrolysis section. After the cell wall skeleton and the crystallization area are destroyed, the pyrolysis starting temperature of cellulose, hemicellulose and lignin can be reduced by 20-30°C, promoting a more rapid devolatilization reaction and further shortening the time required for the subsequent pre-distillation section.

[0051] Usage method: the tail gas discharged from the baking oven can enter the interlayer of the shell 25 from the air inlet end 22, and pre-dry distill the material in the shell 25. The tail gas in the shell 25 is discharged from the exhaust end 21 and enters the air inlet end 13 through the pipe body 41. When the tail gas passes through the pipe body 41, the tail gas temperature is detected by the sensor 44. When the tail gas temperature does not reach the preset temperature, the heating sleeve 42 is controlled to work so that the heat conduction part 43 is heated and the tail gas is heated. After the tail gas reaches the preset temperature, it enters the shell 15. The gas with a certain temperature enters the interlayer inside the shell 15 from the air inlet end 13. The gas heats the material on the inner wall of the shell 15 in the interlayer. The wet straw enters the interior of the shell 15 from the feed port 11. The driving part 5 works to drive the first feeding part 14 to rotate. The first feeding part 1 4 rotates to transport the wet straw. During the movement of the wet straw inside the shell 15, the heat of the inner wall of the shell 15 can preheat the wet straw. The free water and part of the bound water of the wet straw can be removed by the first feeding part 14. After being heated, the wet straw is discharged from the discharge port 1 and enters the rotary valve 3. After passing through the rotary valve 3, the material enters the shell 2 25 through the feed port 23. The driving part 26 drives the second feeding part 24 to rotate to transport the material. The gas heats the material on the inner wall of the shell 2 25 in the interlayer inside the shell 2 25. During the movement of the material inside the shell 2 25, it can exchange heat with the inner wall of the shell 2 25. The material can be pre-dry distilled through the shell 2 25. After pre-dry distillation, it is discharged from the discharge port 2 of the shell 2 25. The discharged material passes through the rotary valve 3 and enters the baking oven.

[0052] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any person skilled in the art who, within the technical scope disclosed by the present invention, makes equivalent substitutions or modifications based on the technical solutions and improved concepts of the present invention shall be covered by the scope of protection of the present invention.

Claims

1. A feeding device for a large biomass roasting furnace, comprising a first feeding part (1) and a second feeding part (2), characterized in that: The first feeding part (1) comprises a shell (15), a first feeding part (14) rotatably connected to the inside of the shell (15), a gas interlayer (1) opened inside the shell (15), an exhaust end (12) and an intake end (13) opened at the upper end and the lower end of the shell (15) and connected to the gas interlayer (1), a feeding port (11) and a discharging port (1) opened at the upper end and the lower end of the shell (15), and a driving part (5) for driving the first feeding part (14) to rotate; The second feeding part (2) comprises a second shell (25), a second feeding part (24) rotatably connected to the inside of the second shell (25), a second gas interlayer opened inside the second shell (25), a second exhaust end (21) and a second gas inlet end (22) opened at the upper end and the lower end of the second shell (25) and connected to the second gas interlayer, a second feeding port (23) and a second discharging port opened at the upper end and the lower end of the second shell (25), and a second driving part (6) for driving the second feeding part (24) to rotate; A rotary valve (3) is fixedly connected between the second feed port (23) and the first discharge port and at the lower end of the second discharge port. The first air inlet end (13) and the second air outlet end (21) are connected via a gas transmission connection portion (4).

2. A large biomass roasting furnace feeding device according to claim 1, characterized in that: The upper end of the second shell (25) is provided with a volatilization outlet (26), and the upper end of the second shell (25) is also fixedly connected with a support portion (9).

3. A large biomass roasting furnace feeding device according to claim 2, characterized in that: The gas transmission connection part (4) comprises a tube body (41) whose two ends are respectively fixed to the second exhaust end (21) and the first intake end (13), a heating sleeve (42) fixed to the outside of the tube body (41), a heat conducting part (43) fixed to the inner wall of the tube body (41) and connected to the heating sleeve (42) to achieve heat conduction, and a sensor (44) fixed to the inner wall of the tube body (41).

4. A large biomass roasting furnace feeding device according to claim 3, characterized in that: A plurality of auger blades are distributed on the outer surface of the first feeding portion (14), and the plurality of auger blades are divided into a loose feeding section (141), a disturbing feeding section (142), and a compressed feeding section (143) according to different spacings between the blades. The disturbing feeding section (142) is located between the loose feeding section (141) and the compressed feeding section (143), and the loose feeding section (141) is close to the feed port 1 (11), and the compressed feeding section (143) is close to the discharge port 1.

5. A large biomass roasting furnace feeding device according to claim 4, characterized in that: The upper end of the shell (15) is provided with a plurality of through slots (7), and a plurality of spoiler columns (71) are fixedly inserted into the interior of the plurality of through slots (7), one end of the plurality of spoiler columns (71) respectively extends between the plurality of blades of the disturbance feeding section (142), and the upper end of the shell (15) is fixedly connected with an electric heating part (72), and the heat conduction end of the electric heating part (72) is fixedly connected to the other end of the plurality of spoiler columns (71).

6. A large biomass roasting furnace feeding device according to claim 1, characterized in that: The second feeding part (24) includes a first feeding screw (241) and a second feeding screw (242) which are rotatably connected to the inside of the second shell (25), and a plurality of auger blades on the surface of the first feeding screw (241) extend between a plurality of auger blades on the surface of the second feeding screw (242). When the first feeding screw (241) and the second feeding screw (242) rotate, they can continuously stir the material between the plurality of auger blades.

7. A large biomass roasting furnace feeding device according to claim 6, characterized in that: The first feeding part (14), the first feeding screw (241), and the second feeding screw (242) are all provided with a hollow cavity inside. The driving part (5) includes a motor (51) fixed to the upper end of the shell (15), a side plate (52) fixed to one side of the shell (15), a gear (53) rotatably connected to one side of the side plate (52), a rotary joint (55) fixed inside the side plate (52), and a gear (53) rotatably connected to the shell. Gear 2 (54) is fixed on one side of housing 1 (15) and is attached to the outside of the inner tube of rotary joint 1 (55), and rotary joint 2 (56) is fixed on one side of housing 1 (15), and the inner tubes of rotary joint 1 (55) and rotary joint 2 (56) both pass through housing 1 (15) and are inserted into the hollow cavity in the first feeding part (14), the gear 1 (53) is meshed with the gear 2 (54), and the output shaft of the motor 1 (51) is connected to the gear 1 (53).

8. A large biomass roasting furnace feeding device according to claim 7, characterized in that: The driving part 2 (6) includes a motor 2 (61) fixed to the upper end of the shell 2 (25), a side plate 2 (62) fixed to one side of the shell 2 (25), a gear 3 (63) rotatably connected to one side of the side plate 2 (62), two rotary joints 3 (65) fixed to the inside of the side plate 2 (62), two gears 4 (64) rotatably connected to one side of the shell 2 (25) and respectively fixed to the outside of the inner tubes of the two rotary joints 3 (65), and two rotary joints 4 (66) fixed to one side of the shell 2 (25), and the inner tubes of the two rotary joints 3 (65) and the two rotary joints 4 (66) all pass through the shell 2 (25) and are inserted into the hollow cavities in the first feeding screw (241) and the second feeding screw (242), the gear 3 (63) is meshed with one of the gears 4 (64), the two gears 4 (64) are meshed, and the output shaft of the motor 2 (61) is connected to the gear 3 (63).

9. A large biomass roasting furnace feeding device according to claim 8, characterized in that: The upper end of the shell (15) is provided with a through slot (8), and the interior of the shell (15) is further provided with a groove (81) connected to the through slot (8), a fan-shaped nozzle (82) is fixedly connected to the interior of the groove (81), and the input end of the fan-shaped nozzle (82) extends outward from the through slot (8) and is connected to the liquid supply portion.

10. A large biomass roasting furnace feeding device according to claim 9, characterized in that: The liquid supply portion includes a pump body (83) fixedly connected to the upper end of the shell (15) and a liquid storage tank (84) fixedly connected to the side of the shell (15). The input end of the pump body (83) is inserted into the liquid storage tank (84) and the output end of the pump body (83) is connected to the input end of the fan-shaped nozzle (82).

Images