Biomass two-step pyrolysis gasification furnace

Abstract

The invention discloses a biomass two-step pyrolysis gasification furnace, and relates to the technical field of gasification furnaces, the biomass two-step pyrolysis gasification furnace comprises a gasification furnace, the top end of the gasification furnace is fixedly connected with a pyrolysis reactor, the top end of the pyrolysis reactor is fixedly connected with a feed inlet and an exhaust pipe, and the biomass two-step pyrolysis gasification furnace further comprises a discharge mechanism, a guide mechanism and a shielding mechanism. By arranging the discharging mechanism, the guiding mechanism and the shielding mechanism, when the discharging port is opened, a displacement rod is reset under the elastic force action of a first spring, the displacement rod displaces to drive a rotating cylinder to rotate, the rotating cylinder rotates to enable a semicircular plate to shield a semicircular hole, and therefore an air inlet pipe is cut off; meanwhile, the through hole is in contact with the air guide pipe, so that air in the air inlet pipe is discharged through the air guide pipe, the air in the air inlet pipe is prevented from entering the connecting bin to cause scattering of the ash when the ash is taken out, the rotating seat is rotated to drive the baffle to rotate for opening operation, and the ash in the gasification furnace is conveniently taken out.

Description

Technical Field

[0001] The invention relates to the technical field of gasifiers, in particular to a biomass two-step pyrolysis gasifier. Background Art

[0002] Biomass thermal cracking (also known as pyrolysis or cracking) usually refers to the process in which biomass is heated in an oxygen-free or low-oxygen environment to cause molecular decomposition to produce coke, condensable liquids and gas products. It is an important form of biomass energy utilization. Biomass thermal cracking technology is one of the cutting-edge technologies in the world's biomass energy research. This technology can convert biomass, mainly waste such as wood chips, into high-quality, easy-to-store, easy-to-transport, high-energy-density and easy-to-use alternative liquid fuels (bio-oil) through continuous processes and factory-based production methods. It can not only be directly used for combustion in existing boilers and gas turbines, but also through further improved processing, the quality of liquid fuels can be made close to that of conventional power fuels such as diesel or gasoline. In addition, chemical products with commercial value can be extracted from it.

[0003] The two-step pyrolysis and gasification process of biomass is a new type of gasification method specially developed for the characteristics of biomass raw materials, such as a wide variety, high moisture content, and low calorific value. Through this process, the dry-flow pyrolysis reactor can pre-heat the biomass raw materials entering the gasifier at a temperature of 500-600 degrees Celsius to remove moisture and volatile components (tar and other substances) in the biomass raw materials, so that they can become semi-carbonized during the gasification process, increase the reaction efficiency and improve the gas quality.

[0004] When the gasifier is in use, the gas generated by the biomass raw material is fully mixed with the air to generate combustible gas. However, when the ash is taken out of the gasifier, the gas entering the air inlet pipe easily blows the ash away, causing the ash to scatter. In order to facilitate the removal of the ash in the gasifier, a biomass two-step pyrolysis gasifier is provided. Summary of the invention

[0005] The object of the present invention is to provide a biomass two-step pyrolysis gasifier in order to facilitate the removal of ash and slag from the gasifier.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a biomass two-step pyrolysis gasification furnace, comprising a gasifier, a pyrolysis reactor is fixedly connected to the top of the gasifier, a feed port and an exhaust pipe are fixedly connected to the top of the pyrolysis reactor, the exhaust pipe is located on one side of the feed port, a connecting pipe connected to the pyrolysis reactor is fixedly connected to the outer wall of the gasifier, an air inlet pipe is fixedly connected to the outer wall of the bottom of the gasifier, a fan is installed on the outer wall of the air inlet pipe, a reaction bin is arranged inside the gasifier, a connecting bin is arranged inside the gasifier at the bottom end of the reaction bin, the connecting bin is connected to the reaction bin through the air inlet, the bottom end of the gasifier is switched on and off by a discharging mechanism, the wind in the air inlet pipe is guided by a guiding mechanism, and the bottom end of the reaction bin is switched on and off by a shielding mechanism; The discharging mechanism includes a discharging port, which is arranged at the bottom end of the gasifier, a connecting groove is opened at the bottom end of the discharging port, a fixing groove is opened on the inner wall of the connecting groove, a bottom plate is arranged below the discharging port, the top end of the bottom plate is fixedly connected with an insert block inserted into the discharging port, the top end of the bottom plate is located at both sides of the insert block and is fixedly connected with connecting blocks, the interior of the connecting block is slidably connected with a fixing block extending from the connecting block, the outer wall of the fixing block is fixedly connected with an elastic sheet, the interior of the connecting block is located below the fixing block and is slidably connected with a push rod, and the push rod extends to the bottom of the bottom plate.

[0007] As a further scheme of the present invention: the guide mechanism includes an air guide pipe, the air guide pipe is fixedly connected to the bottom end of the air inlet pipe, the discharge port is slidably connected to a displacement rod extending into the inner cavity of the connecting groove, a first spring is connected between the displacement rod and the gasifier, the interior of the gasifier is located at the outer wall of the displacement rod and is rotatably connected to a first spur gear, one end of the first spur gear is fixedly connected to a connecting shaft, one end of the connecting shaft is fixedly connected to a second spur gear, the inner wall of the air inlet pipe is rotatably connected to a rotating cylinder, the outer wall of the rotating cylinder is fixedly connected to a third spur gear, the second spur gear is in contact with the third spur gear, the inner wall of the air inlet pipe is located at one end of the rotating cylinder and is fixedly connected to a semicircular plate, the rotating cylinder is provided with a semicircular hole at one end facing the semicircular plate, and the outer wall of the rotating cylinder is provided with a through hole.

[0008] As a further scheme of the present invention: the shielding mechanism includes a baffle, the inner wall of the reaction bin is rotatably connected to the baffle, the outer wall of the baffle is fixedly connected to a rotating shaft, one end of the rotating shaft is fixedly connected to the first bevel gear, the outer wall of the first bevel gear is provided with a second bevel gear, the bottom end of the second bevel gear is fixedly connected to the mounting shaft, the bottom end of the mounting shaft is fixedly connected to a square block, the outer wall of the square block is slidably connected to a rotating seat, the rotating seat is slidably connected to the interior of the gasifier and extends to the bottom of the gasifier, the interior of the gasifier is provided with a rotating groove for the rotating seat to slide, the interior of the gasifier is slidably connected with a positioning block extending to the inner cavity of the discharge port, the positioning block and the gasifier are connected between the second spring, the outer wall of the rotating seat is provided with card grooves on both sides, and the bottom end of the inner wall of the rotating groove is fixedly connected with a card block.

[0009] As a further solution of the present invention: the outer wall of the insert block fits with the inner wall of the discharge port, and the outer wall of the connecting block fits with the inner wall of the connecting groove.

[0010] As a further solution of the present invention: a first inclined surface is arranged at the bottom end of the fixing block, and a top end of the push rod contacts the first inclined surface.

[0011] As a further solution of the present invention: the outer wall of the displacement rod is provided with a tooth groove, and the tooth groove is meshed with the first spur gear.

[0012] As a further solution of the present invention: the second spur gear is meshed with the third spur gear, and the shapes of the semicircular plate and the semicircular hole are both semicircular.

[0013] As a further solution of the present invention: a square groove is provided at the top of the rotating seat, the square groove is fitted with the outer wall of the square block, and the second bevel gear is meshed with the first bevel gear.

[0014] As a further solution of the present invention: one end of the positioning block extending into the inner cavity of the discharge port is provided with a second inclined surface, the inner wall of the slot fits with the outer wall of the block, and the inner wall of the rotating slot fits with the outer wall of the rotating seat.

[0015] As a further solution of the present invention: the gasifier is internally slidably connected with a limit rod extending into the inner cavity of the rotating groove, the bottom end of the limit rod is fixedly connected with a pressure plate, and a third spring is connected to the outer wall of the limit rod between the pressure plate and the rotating groove.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The discharge port is opened by arranging a discharge mechanism, a guide mechanism and a shielding mechanism. When the discharge port is opened, the displacement rod is reset by the elastic force of the first spring, and the displacement of the displacement rod drives the rotating cylinder to rotate. The rotation of the rotating cylinder causes the semicircular plate to block the semicircular hole, thereby cutting off the air inlet pipe. At the same time, the through hole contacts the air guide pipe, so that the air in the air inlet pipe is discharged through the air guide pipe, preventing the air in the air inlet pipe from entering the connecting bin when the ash is taken out, causing the ash to scatter. The rotating seat is rotated to drive the baffle to rotate to open the operation, so as to facilitate the removal of the ash in the gasifier. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 is a partial cross-sectional view of the gasifier of the present invention; Figure 3 It is a schematic diagram of the installation of the base plate of the present invention; Figure 4 is a cross-sectional view of the base plate and the insert block of the present invention; Figure 5 It is a schematic diagram of the installation of the rotating drum of the present invention; Figure 6 is a cross-sectional view of a rotating drum of the present invention; Figure 7 It is a schematic diagram of the installation of the baffle of the present invention; Figure 8 It is a cross-sectional view of the rotating seat of the present invention.

[0018] In the figure: 1, gasifier; 2, pyrolysis reactor; 3, feed port; 4, reaction chamber; 5, connection chamber; 6, air inlet pipe; 7, discharge mechanism; 701, discharge port; 702, connection slot; 703, fixing slot; 704, bottom plate; 705, plug block; 706, connection block; 707, fixing block; 708, elastic sheet; 709, ejector rod; 8, guide mechanism; 801, air guide pipe; 802, displacement rod; 803, first spring; 804, first spur gear; 805, connecting shaft; 806, second spur gear; 807, third spur gear Wheel; 808, rotating cylinder; 809, semicircular plate; 810, semicircular hole; 811, through hole; 9, shielding mechanism; 901, baffle; 902, rotating shaft; 903, first bevel gear; 904, second bevel gear; 905, mounting shaft; 906, square block; 907, rotating seat; 908, rotating groove; 909, positioning block; 910, second spring; 911, clamping block; 912, clamping groove; 10, fan; 11, connecting pipe; 12, exhaust pipe; 13, air inlet; 14, pressure plate; 15, limiting rod; 16, third spring. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following is an explanation of an embodiment of the present invention based on the overall structure of the present invention.

[0021] See also Figures 1 to 8 In an embodiment of the present invention, a biomass two-step pyrolysis gasification furnace includes a gasifier 1, a pyrolysis reactor 2 is fixedly connected to the top of the gasifier 1, a feed port 3 and an exhaust pipe 12 are fixedly connected to the top of the pyrolysis reactor 2, the exhaust pipe 12 is located on one side of the feed port 3, a connecting pipe 11 connected to the pyrolysis reactor 2 is fixedly connected to the outer wall of the gasifier 1, an air inlet pipe 6 is fixedly connected to the outer wall of the bottom of the gasifier 1, a fan 10 is installed on the outer wall of the air inlet pipe 6, a reaction bin 4 is arranged inside the gasifier 1, a connecting bin 5 is arranged at the bottom end of the reaction bin 4 inside the gasifier 1, the connecting bin 5 is connected to the reaction bin 4 through the air inlet 13, the bottom end of the gasifier 1 is switched on and off by a discharging mechanism 7, the wind in the air inlet pipe 6 is guided by a guiding mechanism 8, and the bottom end of the reaction bin 4 is switched on and off by a shielding mechanism 9.

[0022] In this embodiment: the biomass raw materials in the reaction chamber 4 react to generate gas, the fan 10 operates to input air into the connecting chamber 5 through the air inlet pipe 6, the air in the connecting chamber 5 evenly enters the reaction chamber 4 through the air inlet 13, and is fully mixed with the generated gas to generate combustible gas, the combustible gas enters the pyrolysis reactor 2 through the connecting pipe 11, and is finally discharged through the exhaust pipe 12.

[0023] Please refer to Figures 1 to 4 The discharge mechanism 7 includes a discharge port 701, which is arranged at the bottom end of the gasifier 1. A connecting groove 702 is opened at the bottom end of the discharge port 701, and a fixing groove 703 is opened on the inner wall of the connecting groove 702. A bottom plate 704 is arranged below the discharge port 701. The top of the bottom plate 704 is fixedly connected with an insert block 705 inserted into the discharge port 701. The top of the bottom plate 704 is located on both sides of the insert block 705 and is fixedly connected with connecting blocks 706. The interior of the connecting block 706 is slidably connected with a fixed block 707 extending from the connecting block 706. The outer wall of the fixed block 707 is fixedly connected with an elastic sheet 708. The interior of the connecting block 706 is located below the fixed block 707 and is slidably connected with a push rod 709, which extends to the bottom of the bottom plate 704.

[0024] In this embodiment: when closing the discharge port 701, the insert block 705 is inserted into the discharge port 701, and the connecting block 706 is inserted into the connecting groove 702, until the fixing block 707 is engaged into the fixing groove 703 by the elastic force of the elastic sheet 708, and the bottom plate 704 and the insert block 705 are fixed, so that the discharge port 701 is closed; When the discharge port 701 is opened, the push rod 709 is pushed to move. The push rod 709 moves and contacts the fixed block 707, pushing the fixed block 707 to move. The fixed block 707 moves out of the fixed groove 703, cancels the fixation of the connecting block 706, moves the connecting block 706 out of the connecting groove 702, and disassembles the bottom plate 704, thereby opening the discharge port 701.

[0025] Please refer to Figures 5 and 6The guide mechanism 8 includes an air guide pipe 801, which is fixedly connected to the bottom end of the air inlet pipe 6. A displacement rod 802 extending into the inner cavity of the connecting groove 702 is slidably connected inside the discharge port 701. A first spring 803 is connected between the displacement rod 802 and the gasifier 1. A first spur gear 804 is rotatably connected to the outer wall of the displacement rod 802 inside the gasifier 1. A connecting shaft 805 is fixedly connected to one end of the first spur gear 804, and a second spur gear 806 is fixedly connected to one end of the connecting shaft 805. A rotating cylinder 808 is rotatably connected to the inner wall of the air inlet pipe 6. A third spur gear 807 is fixedly connected to the outer wall of the rotating cylinder 808. The second spur gear 806 is in contact with the third spur gear 807. A semicircular plate 809 is fixedly connected to the inner wall of the air inlet pipe 6 at one end of the rotating cylinder 808. A semicircular hole 810 is provided at one end of the rotating cylinder 808 facing the semicircular plate 809, and a through hole 811 is provided on the outer wall of the rotating cylinder 808.

[0026] In this embodiment: when the discharge port 701 is closed, the connection block 706 contacts the displacement rod 802, and the first spring 803 is in a squeezed state. At this time, the semicircular plate 809 is separated from the semicircular hole 810, and the outer wall of the rotating cylinder 808 blocks the air guide duct 801, and air can enter the connection bin 5 through the air inlet pipe 6 and the semicircular hole 810; When the discharge port 701 is opened, the displacement rod 802 is reset by the elastic force of the first spring 803, and the displacement of the displacement rod 802 drives the first spur gear 804 to rotate, and the rotation of the first spur gear 804 drives the connecting shaft 805 to rotate, and the rotation of the connecting shaft 805 drives the second spur gear 806 to rotate, and the second spur gear 806 drives the third spur gear 807 to rotate, and the rotation of the third spur gear 807 drives the rotating cylinder 808 to rotate, and the rotating cylinder 808 rotates so that the semicircular plate 809 blocks the semicircular hole 810, thereby cutting off the air inlet pipe 6, and at the same time, the through hole 811 contacts the air guide pipe 801, so that the air in the air inlet pipe 6 is discharged through the air guide pipe 801, to prevent the air in the air inlet pipe 6 from entering the connecting bin 5 when the ash is taken out, causing the ash to scatter.

[0027] Please refer to Figures 7 and 8The shielding mechanism 9 includes a baffle 901, the inner wall of the reaction chamber 4 is rotatably connected to the baffle 901, the outer wall of the baffle 901 is fixedly connected to a rotating shaft 902, one end of the rotating shaft 902 is fixedly connected to a first bevel gear 903, the outer wall of the first bevel gear 903 is provided with a second bevel gear 904, the bottom end of the second bevel gear 904 is fixedly connected to a mounting shaft 905, the bottom end of the mounting shaft 905 is fixedly connected to a square block 906, and the outer wall of the square block 906 is slidably connected to a rotating seat 907, the rotating seat 907 is slidably connected to the interior of the gasifier 1 and extends to the bottom of the gasifier 1, the interior of the gasifier 1 is provided with a rotating groove 908 for the rotating seat 907 to slide, the interior of the gasifier 1 is slidably connected with a positioning block 909 extending to the inner cavity of the discharge port 701, a second spring 910 is connected between the positioning block 909 and the gasifier 1, both sides of the outer wall of the rotating seat 907 are provided with a clamping groove 912, and the bottom end of the inner wall of the rotating groove 908 is fixedly connected with a clamping block 911.

[0028] In this embodiment: when the baffle 901 is opened, the rotating seat 907 is pushed upward to slide in the rotating groove 908, so that the card block 911 moves out of the card groove 912, and then the rotating seat 907 is rotated, and the square block 906 rotated by the rotating seat 907 rotates, and the square block 906 rotates to drive the installation shaft 905 to rotate, and the installation shaft 905 rotates to drive the second bevel gear 904 to rotate, and the second bevel gear 904 rotates to drive the first bevel gear 903 to rotate, and the first bevel gear 903 rotates to drive the rotating shaft 902 to rotate, and the rotating shaft 902 rotates to drive the baffle 901 to rotate to perform the opening operation; When the baffle 901 is closed, the rotating seat 907 is rotated to reset, and then the rotating seat 907 is pushed downward, and the clamping block 911 is engaged into the clamping groove 912 to position the rotating seat 907. Then, when the discharge port 701 is closed, the insert block 705 is inserted into the discharge port 701, and the insert block 705 contacts the positioning block 909, pushing the positioning block 909 to move. The positioning block 909 moves and contacts the top of the rotating seat 907 to fix the rotating seat 907 to prevent the rotating seat 907 from loosening during the reaction process.

[0029] Please refer to Figures 1 to 4 The outer wall of the insert block 705 fits with the inner wall of the discharge port 701 , and the outer wall of the connecting block 706 fits with the inner wall of the connecting groove 702 .

[0030] In this embodiment: the insert block 705 is inserted into the discharge port 701, and the connecting block 706 is inserted into the connecting groove 702, until the fixing block 707 is engaged into the fixing groove 703 by the elastic force of the elastic sheet 708, thereby fixing the bottom plate 704 and the insert block 705.

[0031] Please refer to Figures 1 to 4The bottom end of the fixed block 707 is provided with a first inclined surface, and the top end of the push rod 709 contacts the first inclined surface.

[0032] In this embodiment: the push rod 709 is pushed to move, the push rod 709 moves and contacts the fixed block 707, pushing the fixed block 707 to move, the fixed block 707 moves out of the fixed groove 703, the fixation of the connecting block 706 is cancelled, the connecting block 706 is moved out of the connecting groove 702, and the bottom plate 704 is disassembled.

[0033] Please refer to Figures 5 and 6 The outer wall of the displacement rod 802 is provided with a tooth groove, the tooth groove is meshed with the first spur gear 804, the second spur gear 806 is meshed with the third spur gear 807, and the semicircular plate 809 and the semicircular hole 810 are both semicircular in shape.

[0034] In this embodiment: the displacement rod 802 is reset by the elastic force of the first spring 803, the displacement of the displacement rod 802 drives the first spur gear 804 to rotate, the rotation of the first spur gear 804 drives the connecting shaft 805 to rotate, the rotation of the connecting shaft 805 drives the second spur gear 806 to rotate, the rotation of the second spur gear 806 drives the third spur gear 807 to rotate, the rotation of the third spur gear 807 drives the rotating cylinder 808 to rotate, the rotation of the rotating cylinder 808 causes the semicircular plate 809 to block the semicircular hole 810, thereby cutting off the air inlet pipe 6, and at the same time the through hole 811 contacts the air duct 801, so that the air in the air inlet pipe 6 is discharged through the air duct 801.

[0035] Please refer to Figures 7 and 8 A square groove is provided at the top of the rotating seat 907, and the square groove is fitted with the outer wall of the square block 906. The second bevel gear 904 is meshed with the first bevel gear 903. The end of the positioning block 909 extending into the inner cavity of the discharge port 701 is provided with a second inclined surface. The inner wall of the slot 912 is fitted with the outer wall of the block 911, and the inner wall of the rotating slot 908 is fitted with the outer wall of the rotating seat 907.

[0036] In this embodiment: the rotating seat 907 is pushed upward to slide in the rotating groove 908, so that the blocking block 911 moves out of the blocking groove 912, and then the rotating seat 907 is rotated, and the square block 906 rotated by the rotating seat 907 rotates, and the square block 906 rotates to drive the installation shaft 905 to rotate, and the installation shaft 905 rotates to drive the second bevel gear 904 to rotate, and the second bevel gear 904 rotates to drive the first bevel gear 903 to rotate, and the first bevel gear 903 rotates to drive the rotating shaft 902 to rotate, and the rotating shaft 902 rotates to drive the baffle 901 to rotate to perform the opening operation.

[0037] Please refer to Figures 7 and 8The gasifier 1 is internally slidably connected with a limit rod 15 extending into the inner cavity of the rotating groove 908, the bottom end of the limit rod 15 is fixedly connected with a pressure plate 14, and a third spring 16 is connected to the outer wall of the limit rod 15 between the pressure plate 14 and the rotating groove 908.

[0038] In this embodiment, the rotating seat 907 can slide in the rotating groove 908 , and the pressing plate 14 pushes the rotating seat 907 under the elastic force of the third spring 16 , so that the rotating seat 907 is maintained at the bottom end of the rotating groove 908 .

[0039] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A biomass two-step pyrolysis gasification furnace, comprising a gasifier (1), wherein the top of the gasifier (1) is fixedly connected to a pyrolysis reactor (2), the top of the pyrolysis reactor (2) is fixedly connected to a feed port (3) and an exhaust pipe (12), the exhaust pipe (12) is located on one side of the feed port (3), the outer wall of the gasifier (1) is fixedly connected to a connecting pipe (11) connected to the pyrolysis reactor (2), the bottom outer wall of the gasifier (1) is fixedly connected to an air inlet pipe (6), the outer wall of the air inlet pipe (6) is installed with a fan (10), a reaction chamber (4) is arranged inside the gasifier (1), and a connecting chamber (5) is arranged inside the gasifier (1) at the bottom end of the reaction chamber (4), the connecting chamber (5) is connected to the reaction chamber (4) through an air inlet (13), and the gasifier (1) is characterized in that: The bottom end of the gasifier (1) is operated to be switched on and off via a discharge mechanism (7), the air in the air inlet pipe (6) is guided via a guide mechanism (8), and the bottom end of the reaction chamber (4) is operated to be switched on and off via a shielding mechanism (9); The discharge mechanism (7) comprises a discharge port (701), the discharge port (701) being arranged at the bottom end of the gasifier (1), a connecting groove (702) being provided at the bottom end of the discharge port (701), a fixing groove (703) being provided on the inner wall of the connecting groove (702), a bottom plate (704) being arranged below the discharge port (701), an insert block (705) inserted into the discharge port (701) being fixedly connected to the top end of the bottom plate (704), and the bottom plate (704) being provided with a fixing groove (703). 4), the top end of which is located at both sides of the insert block (705) and is fixedly connected to connecting blocks (706), the interior of the connecting block (706) is slidably connected to a fixed block (707) extending from the connecting block (706), the outer wall of the fixed block (707) is fixedly connected to an elastic sheet (708), the interior of the connecting block (706) is located below the fixed block (707) and is slidably connected to a top rod (709), and the top rod (709) extends to the bottom of the bottom plate (704).

2. The biomass two-step pyrolysis gasification furnace according to claim 1, characterized in that: The guide mechanism (8) comprises an air guide pipe (801), the air guide pipe (801) being fixedly connected to the bottom end of the air inlet pipe (6), a displacement rod (802) extending into the inner cavity of the connection groove (702) being slidably connected inside the discharge port (701), a first spring (803) being connected between the displacement rod (802) and the gasifier (1), a first spur gear (804) being rotatably connected to the outer wall of the displacement rod (802) inside the gasifier (1), one end of the first spur gear (804) being fixedly connected to a connecting shaft (805), the connecting shaft (80 A second spur gear (806) is fixedly connected to one end of the air inlet pipe (6), a rotating cylinder (808) is rotatably connected to the inner wall of the air inlet pipe (6), a third spur gear (807) is fixedly connected to the outer wall of the rotating cylinder (808), the second spur gear (806) is in contact with the third spur gear (807), an inner wall of the air inlet pipe (6) is fixedly connected to one end of the rotating cylinder (808), a semicircular plate (809) is provided at one end of the rotating cylinder (808), a semicircular hole (810) is provided at one end of the rotating cylinder (808) facing the semicircular plate (809), and a through hole (811) is provided on the outer wall of the rotating cylinder (808).

3. The biomass two-step pyrolysis gasification furnace according to claim 2, characterized in that: The shielding mechanism (9) comprises a baffle (901), the inner wall of the reaction chamber (4) is rotatably connected to the baffle (901), the outer wall of the baffle (901) is fixedly connected to a rotating shaft (902), one end of the rotating shaft (902) is fixedly connected to a first bevel gear (903), the outer wall of the first bevel gear (903) is provided with a second bevel gear (904), the bottom end of the second bevel gear (904) is fixedly connected to a mounting shaft (905), the bottom end of the mounting shaft (905) is fixedly connected to a square block (906), and the outer wall of the square block (906) is slidably connected to a rotating seat (907). The rotating seat (907) is slidably connected to the interior of the gasifier (1) and extends to the bottom of the gasifier (1); a rotating groove (908) for the rotating seat (907) to slide is provided inside the gasifier (1); a positioning block (909) extending to the inner cavity of the discharge port (701) is slidably connected to the interior of the gasifier (1); a second spring (910) is connected between the positioning block (909) and the gasifier (1); slots (912) are provided on both sides of the outer wall of the rotating seat (907); and a blocking block (911) is fixedly connected to the bottom end of the inner wall of the rotating groove (908).

4. The biomass two-step pyrolysis gasification furnace according to claim 1, characterized in that: The outer wall of the insert block (705) fits with the inner wall of the discharge port (701), and the outer wall of the connection block (706) fits with the inner wall of the connection groove (702).

5. The biomass two-step pyrolysis gasification furnace according to claim 1, characterized in that: The bottom end of the fixing block (707) is provided with a first inclined surface, and the top end of the push rod (709) is in contact with the first inclined surface.

6. The biomass two-step pyrolysis gasification furnace according to claim 2, characterized in that: The outer wall of the displacement rod (802) is provided with a tooth groove, and the tooth groove is meshed with the first spur gear (804).

7. The biomass two-step pyrolysis gasification furnace according to claim 2, characterized in that: The second spur gear (806) is meshed with the third spur gear (807), and the semicircular plate (809) and the semicircular hole (810) are both semicircular in shape.

8. The biomass two-step pyrolysis gasification furnace according to claim 3, characterized in that: A square groove is provided at the top of the rotating seat (907), the square groove is fitted with the outer wall of the square block (906), and the second bevel gear (904) is meshed with the first bevel gear (903).

9. The biomass two-step pyrolysis gasification furnace according to claim 3, characterized in that: One end of the positioning block (909) extending into the inner cavity of the discharge port (701) is provided with a second inclined surface, the inner wall of the clamping groove (912) is in contact with the outer wall of the clamping block (911), and the inner wall of the rotating groove (908) is in contact with the outer wall of the rotating seat (907).

10. The biomass two-step pyrolysis gasification furnace according to claim 3, characterized in that: The gasifier (1) is internally slidably connected to a limit rod (15) extending into the inner cavity of the rotating groove (908); the bottom end of the limit rod (15) is fixedly connected to a pressure plate (14); and a third spring (16) is connected to the outer wall of the limit rod (15) between the pressure plate (14) and the rotating groove (908).

Images