Gas-driven supercharging device for biomass pyrolysis gasification gas and biomass pyrolysis gasification system

Abstract

The invention discloses a gas-driven supercharging device for biomass pyrolysis gasification gas and a biomass pyrolysis gasification system. The gas-driven supercharging device comprises a main body, the main body is provided with a first cavity used for containing biomass pyrolysis gasification gas, a second cavity used for containing mixed gas, an inlet used for sucking the biomass pyrolysis gasification gas and an exhaust port used for exhausting the mixed gas, the inlet is communicated with the first cavity, the first cavity is communicated with the second cavity, and the second cavity is communicated with the exhaust port. The second cavity is communicated with the discharge port; and the injection guide pipe comprises an injection nozzle, and the injection nozzle is communicated with the second cavity, so that the injection gas injected by the injection nozzle can be mixed with the biomass pyrolysis gasification gas to form the mixed gas. According to the gas-driven supercharging device for the biomass pyrolysis gasification gas, fan-free supercharging of the biomass pyrolysis gasification gas can be achieved.

Description

Technical Field

[0001] This application relates to the field of booster equipment technology, specifically to a gas-driven booster device and a biomass pyrolysis gasification system for biomass pyrolysis gasification. Background Technology

[0002] The gases generated by biomass pyrolysis (temperature range 500℃~600℃) contain a large amount of tar, high-carbon alkane gases and dust particles. The tar in the pyrolysis gas needs to be condensed and separated through dust removal and cooling processes before it can be burned and utilized.

[0003] However, existing biomass pyrolysis gasification devices produce pyrolysis gas and gasification gas at atmospheric pressure (0-3 kPa), which is insufficient to meet the requirements of subsequent processes. Summary of the Invention

[0004] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, this invention proposes a gas-driven pressurization device for biomass pyrolysis gasification gas, which can achieve fanless pressurization of biomass pyrolysis gasification gas.

[0005] The present invention also proposes a biomass pyrolysis gasification system including a gas-driven booster device for biomass pyrolysis gasification gas as described above.

[0006] The gas-driven pressurization device for biomass pyrolysis gasification gas of the present invention includes: a main body, the main body being provided with a first cavity for containing biomass pyrolysis gasification gas, a second cavity for containing a mixed gas, an inlet for drawing in the biomass pyrolysis gasification gas, and an outlet for discharging the mixed gas, the inlet being connected to the first cavity, the first cavity being connected to the second cavity, and the second cavity being connected to the outlet; and an ejector conduit, the ejector conduit including an ejector nozzle, the ejector nozzle being connected to the second cavity so that the ejector gas ejected from the ejector nozzle can be mixed with the biomass pyrolysis gasification gas to form the mixed gas.

[0007] The biomass pyrolysis gas produced by the atmospheric pressure biomass pyrolysis unit enters the first chamber through the inlet, while the ejector gas enters the second chamber through the ejector nozzle of the ejector conduit. The high-pressure ejector gas and the atmospheric pressure biomass pyrolysis gas mix in the second chamber to form a mixed gas. The pressure of the ejector gas decreases, while the pressure of the biomass pyrolysis gas increases, resulting in a higher pressure of the mixed gas compared to the biomass pyrolysis gas.

[0008] This enables the fanless pressurization of biomass pyrolysis gas, thereby solving the technical challenges of existing biomass pyrolysis polygeneration and gasification coupled with downstream combustion, simplifying the process flow of biomass pyrolysis polygeneration and biomass gasification coupled with downstream combustion, realizing physical isolation between the biomass pyrolysis system, biomass gasification system and downstream boiler, ensuring the safety of system operation, and improving the system's energy utilization efficiency and flexibility.

[0009] Optionally, the inlet is located on the bottom wall of the first cavity, and a first portion of the bottom wall of the first cavity is located between the inlet and the second cavity, wherein one end of the first portion is connected to the inlet, the other end of the first portion is connected to the bottom wall of the second cavity, the first portion is inclined, and one end of the first portion is located below the other end of the first portion.

[0010] Optionally, the first part is provided with a wind cap and / or a vibration mechanism; and / or the tilt angle of the first part is 30 degrees to 75 degrees.

[0011] Optionally, the second cavity includes an inhalation chamber, a first mixing chamber, a second mixing chamber, and a diffusion chamber connected sequentially along a first direction, wherein the length of the inhalation chamber is 0.2-1.5 times the diameter of the outlet of the first mixing chamber; and / or, the length of the first mixing chamber is 1-2.5 times the diameter of the outlet of the first mixing chamber; and / or, the length of the second mixing chamber is 2-5 times the diameter of the outlet of the first mixing chamber; and / or, the length of the diffusion chamber is greater than or equal to 4 times the diameter of the outlet of the first mixing chamber; and / or, the diameter of the inhalation chamber is 2-3 times the diameter of the outlet of the first mixing chamber; and / or, the diameter of the inlet of the inhalation chamber is 0.85-0.95 times the diameter of the outlet of the first mixing chamber.

[0012] Optionally, the gas-driven pressurization device for biomass pyrolysis gasification further includes a forced turbulence device located within the first cavity and between the inlet and the ejector nozzle to enhance the turbulence of the biomass pyrolysis gasification.

[0013] Optionally, the forced turbulence device includes twisting blades and / or spiral blades.

[0014] Optionally, the ejector conduit includes a first tube segment extending along the length of the second cavity, the first tube segment being located within the first cavity, the ejector nozzle being disposed at the end of the first tube segment, the ejector nozzle being located within the second cavity, wherein the twisting blade and / or the spiral blade are disposed on the outer peripheral surface of the first tube segment.

[0015] Optionally, the second cavity includes a suction chamber, a first mixing chamber, a second mixing chamber, and a diffusion chamber connected in sequence. The ejector nozzle extends into the suction chamber through the inlet of the suction chamber. Multiple twisted blades are arranged at intervals along the circumference of the first pipe section on its outer circumferential surface. The angle between the twisted blades and the length direction of the second cavity is 30-60 degrees. The dimension of the twisted blades in the length direction of the second cavity is 3-5 times the diameter of the outlet of the first mixing chamber. The height of the spiral blade is 1 / 3-2 / 3 times the diameter of the inlet of the suction chamber, and the pitch of the spiral blade is equal to the diameter of the outlet of the first mixing chamber.

[0016] Optionally, the twisting blade is adjacent to the ejector nozzle in the length direction of the second cavity; or, the spiral blade is adjacent to the ejector nozzle in the length direction of the second cavity.

[0017] The biomass pyrolysis system of the present invention includes: a biomass pyrolysis apparatus, a boiler, and a gas-driven booster device for discharging biomass pyrolysis gas as described above. The biomass pyrolysis apparatus has an outlet for discharging biomass pyrolysis gas. The inlet of the gas-driven booster device is connected to the outlet, and the boiler is connected to the outlet of the gas-driven booster device.

[0018] The biomass pyrolysis system of the present invention achieves physical isolation between the biomass pyrolysis device and the boiler, and has the advantages of high safety. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a gas-driven pressurization device for biomass pyrolysis gasification according to an embodiment of the present invention.

[0020] Figure 2 This is a schematic diagram of a gas-driven pressurization device for biomass pyrolysis gasification according to an embodiment of the present invention.

[0021] Figure 3 yes Figure 1 Enlarged view of point A in the middle.

[0022] Figure 4 yes Figure 1 An enlarged view of point A in the gas-driven pressurization device for biomass pyrolysis gasification in some other embodiments.

[0023] Figure 5 This is a schematic diagram of the forced turbulence device according to an embodiment of the present invention.

[0024] Figure 6 This is a schematic diagram of a forced turbulence device according to other embodiments of the present invention.

[0025] Figure 7 yes Figure 2A schematic diagram of the cross-section at point B.

[0026] Figure 8 yes Figure 2 A cross-sectional schematic diagram at point B of the gas-driven pressurization device for biomass pyrolysis gasification gasification in some other embodiments.

[0027] Figure 9 yes Figure 2 A cross-sectional schematic diagram at point B of the gas-driven pressurization device for biomass pyrolysis gasification gasification in some other embodiments. Detailed Implementation

[0028] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0029] The following description, in conjunction with the accompanying drawings, describes the gas-driven pressurization device 100 for biomass pyrolysis gasification gas and the biomass pyrolysis gasification system according to embodiments of the present invention.

[0030] like Figure 1 and Figure 2 As shown, the gas-driven pressurization device 100 for biomass pyrolysis gasification gasification in this embodiment of the invention includes a main body 1 and an ejector conduit 2.

[0031] The main body 1 is provided with a first cavity 11 for containing biomass pyrolysis gasification gas, a second cavity 12 for containing mixed gas, an inlet 13 for drawing in biomass pyrolysis gasification gas, and an outlet 14 for discharging the mixed gas. The inlet 13 is connected to the first cavity 11, the first cavity 11 is connected to the second cavity 12, and the second cavity 12 is connected to the outlet 14. The ejector conduit 2 includes an ejector nozzle 3, which is connected to the second cavity 12 so that the ejector gas ejected from the ejector nozzle 3 can mix with the biomass pyrolysis gasification gas to form a mixed gas.

[0032] In other words, the ejector conduit 2 is used to transmit ejector gas. The ejector gas may include at least one of natural gas, liquefied petroleum gas, flue gas, nitrogen, and carbon dioxide. The pressure of the ejector gas should not be lower than 10 kPa, and the pressure of the ejector gas may be between 10 kPa and 4 MPa.

[0033] Atmospheric-pressure biomass pyrolysis gas enters the first chamber 11 through inlet 13, while ejector gas enters the second chamber 12 through ejector nozzle 3 of ejector duct 2. The high-pressure ejector gas and the atmospheric-pressure biomass pyrolysis gas mix in the second chamber 12 to form a mixed gas. The pressure of the ejector gas decreases, while the pressure of the biomass pyrolysis gas increases. The pressure of the mixed gas is higher than that of the biomass pyrolysis gas, thus achieving blower-free pressurization of the biomass pyrolysis gas. This solves the technical challenges of existing biomass pyrolysis combined production and gasification coupled with downstream combustion, simplifies the process flow of biomass pyrolysis combined production and biomass gasification coupled with downstream combustion, achieves physical isolation between the biomass pyrolysis system, biomass gasification system, and downstream boiler, ensures system operational safety, and improves system energy utilization efficiency and flexibility.

[0034] The biomass pyrolysis system of this invention includes a biomass pyrolysis device, a gas-driven booster device 100 for discharging biomass pyrolysis gas as described in the above embodiment, and a boiler. The biomass pyrolysis device is used to pyrolyze biomass and has an outlet for discharging biomass pyrolysis gas. The inlet 13 of the gas-driven booster device 100 is connected to the outlet of the biomass pyrolysis device, and the outlet 14 of the gas-driven booster device 100 is connected to the boiler.

[0035] The biomass pyrolysis gas produced by the biomass pyrolysis unit enters the first chamber 11 through inlet 13, and the ejector gas enters the second chamber 12 through the ejector nozzle 3 of the ejector conduit 2. The high-pressure ejector gas and the atmospheric-pressure biomass pyrolysis gas mix in the second chamber 12 to form a mixed gas. The pressure of the ejector gas decreases, while the pressure of the biomass pyrolysis gas increases, resulting in a higher pressure in the mixed gas compared to the biomass pyrolysis gas. This mixed gas meets the combustion coupling requirements of the downstream boiler and enters the boiler through outlet 14 for combustion coupling. This biomass pyrolysis system of the present invention solves the technical problems of existing biomass pyrolysis multi-generation and gasification coupled with downstream combustion, simplifies the process flow of biomass pyrolysis multi-generation and biomass gasification coupled with downstream combustion, achieves physical isolation between the biomass pyrolysis system, the biomass gasification system, and the downstream boiler, ensures the safety of system operation, and provides the system with higher energy utilization efficiency and flexibility.

[0036] like Figure 1 As shown, inlet 13 is located on the bottom wall of the first cavity 11, that is, inlet 13 is located below the first cavity 11. A first portion 111 of the bottom wall of the first cavity 11 is located between inlet 13 and the second cavity 12. One end of the first portion 111 is connected to inlet 13, and the other end of the first portion 111 is connected to the bottom wall of the second cavity 12. The first portion 111 is inclined, with one end of the first portion 111 located below the other end of the first portion 111. In other words, the end of the first portion 111 closer to inlet 13 is lower than the end of the first portion 111 farther from inlet 13.

[0037] Biomass pyrolysis gas contains a large amount of tar, high-carbon alkane gases, and dust particles. In technologies that use fans to pressurize biomass pyrolysis gas, it is necessary to first remove dust from the gas to prevent the dust particles from wearing down the fans.

[0038] By setting the first part 111 of the bottom wall of the first cavity 11 at an inclination, and making the end of the first part 111 near the inlet 13 lower than the end of the first part 111 away from the inlet 13, not only can the dust particles carried by the biomass pyrolysis gasification gas be effectively prevented from settling, but also a small amount of settled dust particles can slide down along the first part 111 of the inclined bottom wall, so as to avoid the accumulation of dust particles on the bottom wall of the first cavity 11.

[0039] Optionally, the inclination angle of the first portion 111 of the bottom wall is 30°-75°, so that dust particles can easily slide off the first portion 111 of the bottom wall. More preferably, the inclination angle of the first portion 111 of the bottom wall is 40°-60°, so that dust particles can even more easily slide off the first portion 111 of the bottom wall. The inclination angle of the first portion 111 of the bottom wall refers to the angle between the first portion 111 of the bottom wall and the horizontal direction (horizontal plane).

[0040] like Figure 4 As shown, in some embodiments, the first part 111 of the bottom wall of the first cavity 11 is provided with a vent 15, which vents the first part 111 of the bottom wall to make it easier for dust particles on the first part 111 of the bottom wall to slide off the first part 111 of the bottom wall, thereby further preventing the settling and accumulation of dust particles in the biomass pyrolysis gas.

[0041] like Figure 3 As shown, in some embodiments, a vibration mechanism is provided on the first portion 111 of the bottom wall of the first cavity 11. The vibration mechanism is used to cause the first portion 111 of the bottom wall of the first cavity 11 to vibrate. By causing the first portion 111 of the bottom wall to vibrate through the vibration mechanism, dust particles are more likely to slide off the first portion 111 of the bottom wall, thereby further preventing the settling and accumulation of dust particles in the biomass pyrolysis gas.

[0042] like Figure 1 and Figure 2As shown, the second cavity 12 includes an inhalation chamber 18, a first mixing chamber 17, a second mixing chamber 41, and a diffusion chamber 42 connected sequentially along a first direction. That is, the length direction of the second cavity 12 is consistent with the first direction. Optionally, the inhalation chamber 18, the first mixing chamber 17, the second mixing chamber 41, and the diffusion chamber 42 are arranged sequentially along a first horizontal direction (e.g., left-right direction), that is, the inhalation chamber 18, the first mixing chamber 17, the second mixing chamber 41, and the diffusion chamber 42 are connected sequentially along the first horizontal direction.

[0043] In some embodiments, one end (left end) of the first mixing chamber 17 is connected to one end (right end) of the inhalation chamber 18, the other end (right end) of the first mixing chamber 17 is connected to one end (left end) of the second mixing chamber 41, the other end (right end) of the second mixing chamber 41 is connected to one end (left end) of the diffusion chamber 42, and the other end (right end) of the diffusion chamber 42 constitutes the outlet 14.

[0044] The cross-sectional area of ​​the first mixing chamber 17 decreases in the first horizontal direction toward the adjacent outlet 14. For example, the first mixing chamber 17 may be an isobaric mixing chamber. The cross-sectional area of ​​the second mixing chamber 41 remains constant in the first horizontal direction. For example, the second mixing chamber 41 may be an isochoric mixing chamber. The cross-sectional area of ​​the diffusion chamber 42 increases in the first horizontal direction toward the adjacent outlet 14.

[0045] like Figure 1 and Figure 2 As shown, in some embodiments, the main body 1 is provided with a support portion 16, and the support portion 16 is provided with a support hole 161. The first cavity 11 and the suction chamber 18 are located on both sides of the support portion 16, for example, the first cavity 11 and the suction chamber 18 are located on both sides of the support portion 16 in this first direction. In other words, the support portion 16 separates the first cavity 11 and the suction chamber 18.

[0046] The support hole 161 of the support portion 16 forms the outlet of the first cavity 11 and the inlet of the suction chamber 18. The ejector nozzle 3 of the ejector conduit 2 extends into the suction chamber 18 through the inlet (support hole 161 of the support portion 16). This allows the ejector gas to enter the suction chamber 18. The biomass pyrolysis gasification gas in the first cavity 11 enters the suction chamber 18 through the outlet of the first cavity 11 (support hole 161 of the support portion 16), so that the biomass pyrolysis gasification gas and the ejector gas mix in the suction chamber 18 to form a mixed gas.

[0047] like Figure 1 and Figure 2As shown, in some embodiments, the length of the intake chamber 18 (as shown at g) is 0.2-1.5 times the diameter of the outlet 171 of the first mixing chamber 17 (as shown at a) to allow for better initial mixing of the ejector gas and the biomass pyrolysis gasification gas. In other words, the ratio of the length of the intake chamber 18 to the diameter of the outlet 171 of the first mixing chamber 17 is (0.2-1.5):1. The length of the intake chamber 18 refers to its dimension in the first direction (the length direction of the second cavity 12).

[0048] like Figure 1 and Figure 2 As shown, in some embodiments, the length of the first mixing chamber 17 (as shown at f) is 1-2.5 times the diameter of the outlet 171 of the first mixing chamber 17 (as shown at a), so that the ejector gas and the biomass pyrolysis gasification gas can be better further mixed within the first mixing chamber 17. That is, the ratio of the length of the first mixing chamber 17 to the diameter of the outlet 171 of the first mixing chamber 17 is (1-2.5):1. The length of the first mixing chamber 17 refers to the dimension of the first mixing chamber 17 in the first direction (the length direction of the second cavity 12).

[0049] like Figure 1 and Figure 2 As shown, in some embodiments, the length of the second mixing chamber 41 (as shown at point e) is 2-5 times the diameter of the outlet 171 of the first mixing chamber 17 (as shown at point a), so that the ejector gas and the biomass pyrolysis gasification gas can be better further mixed within the second mixing chamber 41. That is, the ratio of the length of the second mixing chamber 41 to the diameter of the outlet 171 of the first mixing chamber 17 is (2-5):1. The length of the second mixing chamber 41 refers to its dimension in the first direction (the length direction of the second cavity 12).

[0050] like Figure 1 and Figure 2 As shown, in some embodiments, the length of the diffusion chamber 42 (as shown at d) is greater than or equal to four times the diameter of the outlet 171 of the first mixing chamber 17 (as shown at a), so that the ejector gas and the biomass pyrolysis gasification gas can be fully mixed within the diffusion chamber 42. The length of the diffusion chamber 42 refers to the dimension of the diffusion chamber 42 in the first direction (the length direction of the second cavity 12).

[0051] like Figure 1 and Figure 2 As shown, in some embodiments, the diameter of the inhalation chamber 18 (as shown at point b) is 2-3 times the diameter of the outlet 171 of the first mixing chamber 17 (as shown at point a) to make the space within the body 1 more efficient. That is, the ratio of the diameter of the inhalation chamber 18 to the diameter of the outlet 171 of the first mixing chamber 17 is (2-3):1.

[0052] like Figure 1 and Figure 2 As shown, in some embodiments, the diameter of the inlet of the suction chamber 18 (the diameter of the support hole 161, as shown at point c) is 0.85-0.95 times the diameter of the outlet 171 of the first mixing chamber 17 (as shown at point a), so that the biomass pyrolysis gas can smoothly enter the suction chamber 18. In other words, the ratio of the diameter of the inlet of the suction chamber 18 to the diameter of the outlet 171 of the first mixing chamber 17 is (0.85-0.95):1.

[0053] In some embodiments, the gas-driven booster device 100 for biomass pyrolysis gasification gas further includes a forced turbulence device located within the first cavity 11 and between the inlet 13 and the ejector nozzle 3. The forced turbulence device is used to enhance the turbulence of the biomass pyrolysis gasification gas, thereby preventing dust particles in the biomass pyrolysis gasification gas from settling, so that the dust particles can enter the subsequent boiler along with the mixed gas.

[0054] In some embodiments, the forced turbulence device includes a spiral blade 52 (such as...). Figure 5 (as shown) and / or twisted blade 51 (as shown) Figure 6 (As shown). This can enhance the radial turbulence of biomass pyrolysis gas, thereby further preventing the settling of dust particles in the biomass pyrolysis gas, so that more dust particles can enter the subsequent boiler with the mixed gas.

[0055] like Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, the ejector conduit 2 includes a first pipe section 21 extending along the length of the second cavity 12, located within the first cavity 11. An ejector nozzle 3 is located at the end 211 of the first pipe section 21, also located within the second cavity 12. Twisted blades 51 and / or spiral blades 52 are disposed on the outer circumferential surface of the first pipe section 21. That is, the twisted blades 51 and / or spiral blades 52 are located within the first cavity 11. This further prevents the settling of dust particles in the biomass pyrolysis gas, allowing more dust particles to enter the subsequent boiler along with the mixed gas.

[0056] Therefore, before the biomass pyrolysis gas is mixed with the ejector gas, the turbulence of the biomass pyrolysis gas in the radial direction of the second cavity 12 can be enhanced by using the twisted blades 51 and / or the spiral blades 52, thereby further preventing the settling of dust particles in the biomass pyrolysis gas and allowing more dust particles to enter the subsequent boiler along with the mixed gas.

[0057] The length of the first pipe section 21 is h, and the length h of the first pipe section 21 is 5-15 times the diameter of the outlet 171 of the first mixing chamber 17. That is, the ratio of the length h of the first pipe section 21 to the diameter of the outlet 171 of the first mixing chamber 17 is (5-15):1.

[0058] Optionally, there may be multiple twisted blades 51. For example, there may be 6 to 20 twisted blades 51. Multiple twisted blades 51 are spaced apart along the circumference of the first pipe section 21 on the outer circumferential surface of the first pipe section 21. This can further enhance the radial turbulence of the biomass pyrolysis gas in the second cavity 12, thereby further preventing the settling of dust particles in the biomass pyrolysis gas, so that more dust particles can enter the subsequent boiler with the mixed gas.

[0059] Optionally, the twist angle of the twisted blade 51 is 30°-60°. This further enhances the radial turbulence of the biomass pyrolysis gas in the second chamber 12, thereby further preventing the settling of dust particles in the biomass pyrolysis gas and allowing more dust particles to enter the subsequent boiler along with the mixed gas. The twist angle of the twisted blade 51 refers to the angle between the twisted blade 51 and the extension direction of the first pipe section 21.

[0060] Optionally, the size of the twisted blade 51 in the longitudinal direction (the first direction) of the second cavity 12 is 3-5 times the diameter of the outlet 171 of the first mixing chamber 17. In other words, the ratio of the size of the twisted blade 51 in the longitudinal direction of the second cavity 12 to the diameter of the outlet 171 of the first mixing chamber 17 is (3-5):1. This can further enhance the radial turbulence of the biomass pyrolysis gas in the second cavity 12, thereby further preventing the settling of dust particles in the biomass pyrolysis gas, so that more dust particles can enter the subsequent boiler with the mixed gas.

[0061] like Figure 1 and Figure 5 As shown, in some embodiments, the height of the spiral blade 52 (as shown at h) is 1 / 3 to 2 / 3 times the diameter of the inlet of the suction chamber 18 (as shown at c), the pitch of the spiral blade 52 (as shown at i) is equal to the diameter of the outlet 171 of the first mixing chamber 17 (as shown at a), and the total length of the spiral blade 52 is 3 to 5 times the pitch (single tooth length). This further enhances the radial turbulence of the biomass pyrolysis gas in the second chamber 12, thereby further preventing the settling of dust particles in the biomass pyrolysis gas, so that more dust particles can enter the subsequent boiler with the mixed gas.

[0062] In some embodiments, the ejector duct 2 is provided with a pressure transmitter to regulate the pressure of the ejector gas. The pressure transmitter is interlocked with the control circuit of the boiler. The ejector duct 2 is provided with a pressure alarm, which is configured to alarm when the pressure of the ejector gas is abnormal.

[0063] The pressure transmitter is interlocked with the boiler's control circuit so that the pressure of the ejector gas can be adjusted according to the boiler's gas pressure.

[0064] When the boiler pressure rises more than normal, the ejector gas flow rate increases, the gas flow rate that ejector duct 2 can eject increases, the gas volume inside the boiler decreases, and the boiler pressure drops. Conversely, when the boiler pressure drops more than normal, the ejector gas flow rate decreases, the gas flow rate that ejector duct 2 can eject decreases, the gas volume inside the boiler increases, and the boiler pressure rises.

[0065] like Figure 7 , Figure 8 and Figure 9 As shown, in some embodiments, the ejector nozzle 3 has a single-channel structure, and the cross-sectional shape of the single-channel structure is one of circular, square, cross-shaped, triangular, and polygonal. The single-channel ejector nozzle 3 ensures the pressure of the ejector gas in the ejector nozzle.

[0066] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0067] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0068] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0069] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0070] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0071] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A gas-driven pressurization device for biomass pyrolysis gasification, characterized in that, include: The main body is provided with a first cavity for containing biomass pyrolysis gasification gas, a second cavity for containing mixed gas, an inlet for drawing in the biomass pyrolysis gasification gas, and an outlet for discharging the mixed gas. The inlet is connected to the first cavity, the first cavity is connected to the second cavity, and the second cavity is connected to the outlet. and An ejector conduit includes an ejector nozzle, which is connected to the second cavity so that the ejector gas ejected from the ejector nozzle can be mixed with the biomass pyrolysis gas to form the mixed gas.

2. The gas-driven pressurization device for biomass pyrolysis gasification according to claim 1, characterized in that, The inlet is located on the bottom wall of the first cavity. A first portion of the bottom wall of the first cavity is located between the inlet and the second cavity. One end of the first portion is connected to the inlet, and the other end of the first portion is connected to the bottom wall of the second cavity. The first portion is inclined, and one end of the first portion is located below the other end of the first portion.

3. The gas-driven pressurization device for biomass pyrolysis gasification according to claim 2, characterized in that, The first part is provided with a wind cap and / or a vibration mechanism; and / or The tilt angle of the first part is 30 degrees to 75 degrees.

4. The gas-driven pressurization device for biomass pyrolysis gasification gasification according to claim 1, characterized in that, The second cavity includes an inhalation chamber, a first mixing chamber, a second mixing chamber, and a diffusion chamber connected sequentially along a first direction, wherein... The length of the inhalation chamber is 0.2-1.5 times the diameter of the outlet of the first mixing chamber; and / or, The length of the first mixing chamber is 1-2.5 times the diameter of the outlet of the first mixing chamber; and / or, The length of the second mixing chamber is 2-5 times the diameter of the outlet of the first mixing chamber; and / or, The length of the diffusion chamber is greater than or equal to four times the diameter of the outlet of the first mixing chamber; and / or, The diameter of the inhalation chamber is 2-3 times the diameter of the outlet of the first mixing chamber; and / or, The diameter of the inlet of the inhalation chamber is 0.85-0.95 times the diameter of the outlet of the first mixing chamber.

5. The gas-driven pressurization device for biomass pyrolysis gasification gas according to claim 1, characterized in that, It further includes a forced turbulence device located within the first cavity, between the inlet and the ejector nozzle, to enhance the turbulence of the biomass pyrolysis gas.

6. The gas-driven pressurization device for biomass pyrolysis gasification gasification according to claim 5, characterized in that, The forced turbulence device includes twisting blades and / or spiral blades.

7. The gas-driven pressurization device for biomass pyrolysis gasification gas according to claim 6, characterized in that, The ejector conduit includes a first tube segment extending along the length of the second cavity, the first tube segment being located within the first cavity, the ejector nozzle being disposed at the end of the first tube segment, the ejector nozzle being located within the second cavity, wherein the twisting blade and / or the spiral blade are disposed on the outer peripheral surface of the first tube segment.

8. The gas-driven pressurization device for biomass pyrolysis gasification gas according to claim 7, characterized in that, The second cavity includes a suction chamber, a first mixing chamber, a second mixing chamber, and a diffusion chamber connected in sequence. The ejector nozzle extends into the suction chamber through the inlet of the suction chamber. The twisted blades are multiple, and the multiple twisted blades are spaced apart on the outer circumferential surface of the first pipe section along the circumference. The angle between the twisted blades and the length direction of the second cavity is 30 degrees to 60 degrees, and the size of the twisted blades in the length direction of the second cavity is 3 to 5 times the diameter of the outlet of the first mixing chamber. The height of the spiral blade is 1 / 3 to 2 / 3 times the diameter of the inlet of the suction chamber, and the pitch of the spiral blade is equal to the diameter of the outlet of the first mixing chamber.

9. The gas-driven pressurization device for biomass pyrolysis gasification gas according to claim 7, characterized in that, The twisting blade is adjacent to the ejector nozzle in the longitudinal direction of the second cavity; Alternatively, the spiral blade is adjacent to the ejector nozzle along the length of the second cavity.

10. A biomass pyrolysis gasification system, characterized in that it comprises: A biomass pyrolysis device, the biomass pyrolysis device having an outlet for discharging biomass pyrolysis gas; The gas-driven booster device for biomass pyrolysis gasification gas as described in any one of claims 1 to 9, wherein the inlet of the gas-driven booster device is connected to the outlet; A boiler, wherein the boiler is connected to the outlet of the gas-driven booster device.

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