Biomass continuous segmented baking furnace

Abstract

The invention provides a biomass continuous segmentation baking furnace which comprises a feeding mechanism, a reaction furnace body and a discharging mechanism, and the feeding mechanism is used for feeding biomass raw materials; the reaction furnace body is communicated with an outlet of the feeding mechanism, the reaction furnace body at least comprises a first-section reaction furnace body and a second-section reaction furnace body, each section of reaction furnace body is provided with at least one hot carrier gas inlet mechanism in the height direction of the reaction furnace body, and different hot carrier gas inlet mechanisms are used for inputting hot carrier gas with the same or different temperatures and flows into the reaction furnace body; the reaction furnace body has different temperature fields along the height direction of the reaction furnace body; and the discharging mechanism is communicated with the outlet of the reaction furnace body and is used for receiving the biomass briquette fuel reacted in the reaction furnace body and discharging the biomass briquette fuel. The continuous segmented biomass baking furnace not only can adapt to various different biomass raw materials, but also can be accurately matched with a biomass pyrolysis stage, the tar yield is reduced, and the reaction efficiency and the product quality are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of biomass energy, and in particular relates to a biomass continuous segmented baking furnace. Background Art

[0002] As a major agricultural country, my country boasts abundant crop straw resources, with an annual output of approximately 600 million tons, of which approximately 350 million tons are usable. This straw is primarily distributed in eastern China, with the North China Plain and Northeast China Plain as core distribution areas, and constitutes the primary source of crop straw in my country. Processing straw into briquette fuel effectively increases its density, greatly facilitating its transportation, storage, and application, successfully breaking through the bottleneck of large-scale biomass application. This processing method also improves the combustion properties of straw, effectively promoting its energy utilization, which is of great significance for achieving efficient resource conversion and sustainable development.

[0003] As an important means of biomass utilization, biomass carbonization technology is based on the principle of heating biomass materials to a specific temperature to cause them to undergo pyrolysis reactions, thereby generating biochar and other by-products.

[0004] However, current baking furnaces have many problems in the process of carbonizing biomass, such as: they can only adapt to a single biomass raw material; the carbonization process is difficult to accurately control, resulting in unstable product quality; the production process is discontinuous, which restricts the improvement of production efficiency; and the remaining products produced during the carbonization process are not effectively utilized, resulting in a waste of resources. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a biomass continuous segmented baking furnace that can not only adapt to a variety of different biomass raw materials, but also accurately match the biomass pyrolysis stage, reduce tar production, and improve reaction efficiency and product quality.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A biomass continuous segmented baking furnace, comprising:

[0008] Feeding mechanism, used for feeding biomass raw materials;

[0009] a reaction furnace body, connected to the outlet of the feeding mechanism, the reaction furnace body comprising at least one reaction furnace body section and a second reaction furnace body section, each reaction furnace body section being provided with at least one hot carrier gas inlet mechanism along its height direction, the different hot carrier gas inlet mechanisms being used to input hot carrier gases of the same or different temperatures and flow rates into the reaction furnace body, so that the reaction furnace body has different temperature fields along its height direction;

[0010] The discharging mechanism is connected to the outlet of the reaction furnace body and is used for receiving the biomass briquette fuel after the reaction of the reaction furnace body and unloading the biomass briquette fuel.

[0011] Optionally, the feeding mechanism includes a feeding bin and a feeding auger, the outlet of the feeding bin is connected to the inlet of the feeding auger, and the outlet of the feeding auger is connected to the inlet of the reaction furnace body.

[0012] Optionally, the feed bin includes a feed bin body, a first feeding port and a first discharging port, the first feeding port is provided with a first gate valve, and the first discharging port is provided with a second gate valve;

[0013] A first pressure relief pipe and a first pressure charging pipe are respectively provided on both sides of the feed bin body. A first pressure relief valve is provided in the first pressure relief pipe, and a first pressure charging valve is provided in the first pressure charging pipe.

[0014] Optionally, the feeding auger is arranged at an angle, and the angle between the central axis of the feeding auger and the horizontal plane is 50°-70°.

[0015] Optionally, the feed auger includes a first driving member, a feed auger body, a feed end and a discharge end, the feed end and the discharge end are respectively arranged at two ends of the feed auger body, and the feed end is arranged lower than the discharge end;

[0016] The feeding auger includes a feeding shell and a first screw conveying shaft, and the first driving member is connected to the first screw conveying shaft.

[0017] Optionally, it further comprises a material level meter, which is arranged on the reactor body near the feeding auger;

[0018] The material level meter is electrically connected to the first driving member.

[0019] Optionally, the feed auger further comprises a heating jacket, which is provided on the feed auger body, and a gap for filling hot air is provided between the heating jacket and the feed auger body;

[0020] The heating sleeve is also provided with a heating medium inlet and a heating medium outlet, both of which are connected to the gap. The heating medium inlet is provided at the discharge end, and the heating medium outlet is provided at the feed end.

[0021] Optionally, the reaction furnace body includes at least a first-stage reaction furnace body and a second-stage reaction furnace body that are connected to each other, the first-stage reaction furnace body and the second-stage reaction furnace body are arranged in sequence along the vertical direction, the first-stage reaction furnace body is connected to the feeding mechanism, and the second-stage reaction furnace body is connected to the discharging mechanism;

[0022] The first-stage reaction furnace body and the second-stage reaction furnace body are both provided with at least one hot carrier gas inlet mechanism.

[0023] Optionally, the hot carrier gas intake mechanism includes a first hot carrier gas intake mechanism, a second hot carrier gas intake mechanism and a third hot carrier gas intake mechanism;

[0024] The first hot carrier gas inlet mechanism is arranged in the first stage reaction furnace body, the second hot carrier gas inlet mechanism and the third hot carrier gas inlet mechanism are both arranged in the second stage reaction furnace body, and the third hot carrier gas inlet mechanism is arranged below the second hot carrier gas inlet mechanism.

[0025] Optionally, the first hot carrier gas inlet mechanism includes a first hot carrier gas inlet pipe and a first-stage guide cone, the first hot carrier gas inlet pipe includes a first inlet end and a first outlet end, the first inlet end extends into the interior of the first stage reaction furnace body, and the first outlet end is located outside the first stage reaction furnace body;

[0026] The first air outlet end is provided with a first-level guide cone, and the air outlet of the first-level guide cone is arranged toward the feed auger.

[0027] Optionally, the gas outlet of the first-stage guide cone is arranged on the central axis of the reaction furnace body;

[0028] The cone angle of the first-level guide cone is 30°-45°.

[0029] Optionally, the second hot carrier gas inlet mechanism includes a second hot carrier gas inlet pipe and a secondary guide cone, the second hot carrier gas inlet pipe includes a second inlet end and a second outlet end, the second inlet end extends into the interior of the second-stage reaction furnace body, and the second outlet end is located outside the second-stage reaction furnace body;

[0030] The second air outlet end is provided with a secondary guide cone, and the air outlet of the secondary guide cone is arranged toward the feed auger.

[0031] Optionally, the gas outlet of the secondary guide cone is arranged on the central axis of the reaction furnace body;

[0032] The cone angle of the secondary guide cone is 30°-45°.

[0033] Optionally, the third hot carrier gas inlet mechanism is a third hot carrier gas inlet pipe, the third hot carrier gas inlet pipe includes a third inlet end and a third outlet end, the third inlet end extends into the interior of the second-stage reaction furnace body, and the third outlet end is located outside the second-stage reaction furnace body;

[0034] The gas outlet of the third gas outlet end is arranged on the central axis of the reaction furnace body, and the gas outlet of the third gas outlet end is arranged toward the discharge mechanism;

[0035] There is a preset distance between the third hot carrier gas inlet pipe and the second hot carrier gas inlet pipe in the height direction of the reaction furnace body.

[0036] Optionally, it further comprises a plurality of thermocouples, wherein the plurality of thermocouples are arranged on the furnace wall of the reaction furnace along the height direction of the reaction furnace body, and the detection ends of the thermocouples are placed inside the reaction furnace body;

[0037] The thermocouple is arranged opposite to the hot carrier gas inlet mechanism.

[0038] Optionally, the first stage reaction furnace body is a single-tube structure;

[0039] The second-stage reaction furnace body includes an inner cylinder and an outer cylinder. The outer cylinder is sleeved on the inner cylinder, and a gas channel is provided between the inner cylinder and the outer cylinder.

[0040] Optionally, the reaction furnace body further includes a ventilation furnace wall, which is arranged in the second-stage reaction furnace body and is connected to the gas channel;

[0041] The outer cylinder is further provided with a pyrolysis gas outlet, which is communicated with the gas channel.

[0042] Optionally, the ventilation furnace wall includes a first screen, a reinforcing rib plate and a second screen, the reinforcing rib plate is arranged between the first screen and the second screen, and the first screen, the reinforcing rib plate and the second screen are bonded together;

[0043] The reinforcing plate ribs are provided with a plurality of through holes for communicating with the first screen and the second screen.

[0044] Optionally, the first-stage reaction furnace body and the second-stage reaction furnace body are connected via a flange;

[0045] The distance from the flange to the second hot carrier gas inlet pipe is 1 / 4 of the distance from the flange to the ventilation furnace wall;

[0046] The distance from the flange to the third hot carrier gas inlet pipe is 1 / 2 of the distance from the flange to the ventilation furnace wall.

[0047] Optionally, the second-stage reactor body is further provided with arch-breaking plates, which are staggeredly arranged on the inner wall of the second-stage reactor body;

[0048] The angle between the arch-breaking plate and the central axis of the reactor body is 30°-45°;

[0049] The vertical distance between two adjacent broken arch plates is 3-5 times the length of the biomass raw material.

[0050] Optionally, the discharging mechanism includes a discharging bin and a discharging auger, the outlet of the discharging bin is connected to the inlet of the discharging auger, and the outlet of the discharging auger is connected to the outlet of the reaction furnace body.

[0051] Optionally, the discharge bin includes a discharge bin body, a second feeding port and a second discharge port, the second feeding port is provided with a third gate valve, and the second discharge port is provided with a fourth gate valve;

[0052] A second pressure relief pipe and a second punching pipe are respectively provided on both sides of the discharge bin body. A second pressure relief valve is provided in the second pressure relief pipe, and a second pressure charging valve is provided in the second pressure charging pipe.

[0053] Optionally, the discharging auger is arranged parallel to the horizontal plane;

[0054] The discharging auger further comprises a cooling water jacket, which is mounted on the discharging auger, and a water flow channel for cooling water to enter is provided between the cooling water jacket and the discharging auger;

[0055] One end of the cooling water jacket is provided with a cooling water inlet, and the other end is provided with a condensed water outlet.

[0056] It can be seen from the above technical solution that when the biomass continuous segmented baking furnace is working, the biomass raw materials need to be added to the feeding mechanism, and the biomass raw materials enter the reactor body through the feeding mechanism. Since the reactor body includes at least one stage reactor body and a second stage reactor body, each stage reactor body is provided with at least one hot carrier gas intake mechanism along its height direction, and the hot carrier gas intake mechanism can input hot carrier gas of the same or different temperature and flow rate into the reactor body. Therefore, when the biomass raw materials fall along the height direction of the reactor body, biomass molded fuel is generated after passing through different temperature fields at different height positions of the reactor body and is output from the discharge mechanism.

[0057] Compared with the prior art, the biomass continuous segmented baking furnace disclosed in the embodiment of the present invention has the following technical effects:

[0058] 1) Strong raw material applicability, able to adapt to a variety of different biomass raw materials: Different biomasses have different pyrolysis characteristics, such as the required drying temperature, pyrolysis volatilization rate, and carbonization temperature range. By flexibly adjusting the segmented temperature field, it can adapt to the pyrolysis requirements of various raw materials, eliminating the need to design equipment specifically for a single raw material and reducing the requirements for raw material pretreatment;

[0059] 2) Precisely matching the biomass pyrolysis stages to improve reaction efficiency and product quality: Different hot carrier gas inlet mechanisms are used to divide the gas curtain formed by the reactor into multiple reaction sections. Each reaction section can independently adjust the inlet temperature and flow rate to form a temperature field that matches the various stages of biomass pyrolysis (such as drying, pyrolysis volatilization, and constant temperature carbonization). By adjusting the temperature and hot carrier gas flow rate of different reaction sections, the ratio of biomass pyrolysis products (such as char, tar, and pyrolysis gas) can be controlled in a targeted manner.

[0060] 3) Reduce tar production and optimize product quality: The reactor body adopts a downward design. The tar precursor produced during the pyrolysis and volatilization stage needs to flow through the constant temperature carbonization bed at the bottom (high temperature and full of coke). The high adsorption capacity of coke can capture the tar precursor, causing it to undergo further secondary pyrolysis at high temperature (converted into small molecular gas or coke), thereby significantly reducing the tar content in the final product. The reduction in tar not only reduces the difficulty of subsequent product processing (such as gas purification), but also improves the purity and combustion efficiency of the pyrolysis gas, while also improving the purity of the solid carbon. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0062] Figure 1 This is a schematic diagram of the overall structure of the biomass continuous segmented baking furnace disclosed in an embodiment of the present invention;

[0063] Figure 2 This is a structural diagram of the feeding mechanism disclosed in an embodiment of the present invention;

[0064] Figure 3 This is a front view of the feed bin disclosed in an embodiment of the present invention;

[0065] Figure 4 A bottom view of the feed bin disclosed in an embodiment of the present invention;

[0066] Figure 5 This is a schematic structural diagram of a feeding auger disclosed in an embodiment of the present invention;

[0067] Figure 6 A schematic structural diagram of a reaction furnace body disclosed in an embodiment of the present invention;

[0068] Figure 7 A schematic structural diagram of the arch-breaking plate disclosed in an embodiment of the present invention;

[0069] Figure 8This is a schematic structural diagram of the first hot carrier gas inlet mechanism disclosed in an embodiment of the present invention;

[0070] Figure 9 This is a schematic structural diagram of the second hot carrier gas inlet mechanism disclosed in an embodiment of the present invention;

[0071] Figure 10 This is a schematic structural diagram of a third hot carrier gas inlet mechanism disclosed in an embodiment of the present invention;

[0072] Figure 11 A schematic structural diagram of a ventilated furnace wall disclosed in an embodiment of the present invention;

[0073] Figure 12 This is a structural diagram of the discharging mechanism disclosed in an embodiment of the present invention;

[0074] Figure 13 This is a front view of the discharge bin disclosed in an embodiment of the present invention;

[0075] Figure 14 A bottom view of the discharge bin disclosed in an embodiment of the present invention;

[0076] Figure 15 This is a schematic structural diagram of the discharging auger disclosed in an embodiment of the present invention.

[0077] Description of reference numerals:

[0078] 100, feed bin; 101, feed bin body; 102, first feeding port; 103, first discharge port; 104, first gate valve; 105, second gate valve; 106, first pressure relief pipe; 107, first pressure charging pipe;

[0079] 200, feed auger; 201, feed auger body; 202, first feed end; 203, first discharge end; 204, heating medium inlet; 205, heating medium outlet; 206, first drive member;

[0080] 300, reactor body; 301, first-stage reactor body; 302, second-stage reactor body; 3021, inner tube; 3022, outer tube; 3023, gas channel; 303, first hot carrier gas inlet mechanism; 3031, first hot carrier gas inlet pipe; 3032, first-stage guide cone; 304, second hot carrier gas inlet mechanism; 3041, second hot carrier gas inlet pipe; 3042, second-stage guide cone; 305, third hot carrier gas inlet mechanism; 306, thermocouple; 3061 , first thermocouple; 3062, second thermocouple; 3063, third thermocouple; 3064, fourth thermocouple; 3065, fifth thermocouple; 3066, sixth thermocouple; 3067, seventh thermocouple; 307, air lock; 308, ventilation furnace wall; 3081, first screen; 3082, second screen; 3083, reinforcing rib plate; 3083a, through hole; 309, pyrolysis gas outlet; 310, material level meter; 311, flange; 312, arch breaker;

[0081] 400, discharge bin; 401, discharge bin body; 402, second feeding port; 403, second discharge port; 404, third gate valve; 405, fourth gate valve; 406, second pressure relief pipe; 407, second pressure charging pipe;

[0082] 500, discharging auger; 501, discharging auger body; 502, second feeding end; 503, second discharging end; 504, cooling water jacket; 505, second driving member. DETAILED DESCRIPTION

[0083] In view of this, the core of the present invention is to provide a biomass continuous segmented baking furnace, which can not only adapt to a variety of different biomass raw materials, but also accurately match the biomass pyrolysis stage, reduce tar production, and improve reaction efficiency and product quality.

[0084] 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 embodiments described 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 making creative work are within the scope of protection of the present invention. Please refer to Figures 1 to 15 .

[0085] Please refer to Figure 1The biomass continuous segmented baking furnace disclosed in the embodiment of the present invention includes a feeding mechanism, a reaction furnace body 300 and a discharging mechanism, wherein the feeding mechanism is used for the entry of biomass raw materials, the reaction furnace body 300 is connected to the outlet of the feeding mechanism, the reaction furnace body 300 includes at least one stage reaction furnace body 301 and a second stage reaction furnace body 302, and each stage reaction furnace body 300 is provided with at least one hot carrier gas intake mechanism along its height direction. Different hot carrier gas intake mechanisms are used to input hot carrier gases of the same or different temperatures and flow rates into the reaction furnace body 300, so that the reaction furnace body 300 has different temperature fields along its height direction. The discharging mechanism is connected to the outlet of the reaction furnace body 300, and is used to receive the biomass molded fuel after the reaction of the reaction furnace body 300, and unload the biomass molded fuel.

[0086] When the biomass continuous segmented baking furnace is working, the biomass raw materials need to be added to the feeding mechanism, and the biomass raw materials enter the reactor body 300 through the feeding mechanism. Since the reactor body 300 includes at least one stage reactor body 301 and a second stage reactor body 302, each stage reactor body 300 is provided with at least one hot carrier gas intake mechanism along its height direction, and the hot carrier gas intake mechanism can input hot carrier gas of the same or different temperature and flow into the reactor body 300. Therefore, when the biomass raw materials fall along the height direction of the reactor body 300, biomass molded fuel is generated after passing through different temperature fields at different height positions of the reactor body 300 and is output from the discharge mechanism.

[0087] It should be explained that biomass refers to various organisms formed through photosynthesis, including all plants, animals, and microorganisms. Its core is the use of solar energy to convert and store organic matter. It is an important renewable energy resource. For example, agricultural waste such as straw, rice husks, corn cobs, etc.

[0088] Compared with the prior art, the biomass continuous segmented baking furnace disclosed in the embodiment of the present invention has the following technical effects:

[0089] 1) Strong raw material applicability, able to adapt to a variety of different biomass raw materials: Different biomasses have different pyrolysis characteristics, such as the required drying temperature, pyrolysis volatilization rate, and carbonization temperature range. By flexibly adjusting the segmented temperature field, it can adapt to the pyrolysis requirements of various raw materials, eliminating the need to design equipment specifically for a single raw material and reducing the requirements for raw material pretreatment;

[0090] 2) Precisely matching the biomass pyrolysis stages to improve reaction efficiency and product quality: Different hot carrier gas inlet mechanisms are used to divide the gas curtain formed by the reactor into multiple reaction sections. Each reaction section can independently adjust the inlet temperature and flow rate to form a temperature field that matches the various stages of biomass pyrolysis (such as drying, pyrolysis volatilization, and constant temperature carbonization). By adjusting the temperature and hot carrier gas flow rate of different reaction sections, the ratio of biomass pyrolysis products (such as char, tar, and pyrolysis gas) can be controlled in a targeted manner.

[0091] 3) Reduce tar production and optimize product quality: The reactor body adopts a downward design. The tar precursor produced during the pyrolysis and volatilization stage needs to flow through the constant temperature carbonization bed at the bottom (high temperature and full of coke). The high adsorption capacity of coke can capture the tar precursor, causing it to undergo further secondary pyrolysis at high temperature (converted into small molecular gas or coke), thereby significantly reducing the tar content in the final product. The reduction in tar not only reduces the difficulty of subsequent product processing (such as gas purification), but also improves the purity and combustion efficiency of the pyrolysis gas, while also improving the purity of the solid carbon.

[0092] It should be explained that the hot carrier gas is biomass pyrolysis gas with an oxygen content of <2% (volume fraction) or an inert gas, such as N2, CO2 or water vapor.

[0093] The embodiments of the present invention do not limit the specific structure of the feeding mechanism. As long as the structure meets the use requirements of the present invention, it is within the protection scope of the present invention.

[0094] As one example, please refer to Figure 2 The feeding mechanism disclosed in the embodiment of the present invention includes a feeding bin 100 and a feeding auger 200 , the outlet of the feeding bin 100 is connected to the inlet of the feeding auger 200 , and the outlet of the feeding auger 200 is connected to the inlet of the reaction furnace body 300 .

[0095] Please refer to Figure 3-Figure 4 The feed bin 100 includes a feed bin body 101, a first feeding port 102 and a first discharging port 103. A first gate valve 104 is provided at the first feeding port 102, and a second gate valve 105 is provided at the first discharging port 103. A first pressure relief pipe 106 and a first pressure charging pipe are respectively provided on both sides of the feed bin body 101. A first pressure relief valve is provided in the first pressure relief pipe 106, and a first pressure charging valve is provided in the first pressure charging pipe 107.

[0096] When the biomass continuous segmented baking furnace is working, first, porcelain balls are used as supporting materials to establish the material level in the reactor. When the material level reaches the preset position, the entire reactor system is sealed, and nitrogen is used to replace the reactor system and pressurize it to a first preset pressure. Then, the corresponding temperature field is established by adjusting the temperature and flow of the hot carrier gas in the hot carrier gas intake mechanism. After the temperature field is set, the second gate valve 105 is closed, and the pressure of the feed bin main body 101 is relieved through the first pressure relief pipe 106. After the feed bin 100 is relieved to normal pressure, the first gate valve 104 is opened to add the raw materials into the feed bin main body 101, and then the first gate valve 104 and the first pressure relief pipe 106 are closed, and the feed bin 100 is replaced and pressurized with nitrogen through the first pressure charging pipe 107. When it is pressurized to the second preset pressure, the second gate valve 105 is opened to allow the biomass raw materials to enter the reactor through the feed auger 200.

[0097] The embodiment of the present invention does not limit the specific structure of the feeding auger 200. As long as the structure meets the use requirements of the present invention, it is within the protection scope of the present invention.

[0098] As one example, please refer to Figure 5 The feeding auger 200 disclosed in the embodiment of the present invention is arranged tilted, wherein the angle between the central axis of the feeding auger 200 and the horizontal plane is 50°-70°.

[0099] As a further embodiment, the feeding auger 200 disclosed in the embodiment of the present invention includes a feeding auger body 201, a feeding end and a discharging end, the feeding end and the discharging end are respectively arranged at the two ends of the feeding auger body 201, and the feeding end is arranged lower than the discharging end.

[0100] The feed auger 200 includes a feed housing and a first screw conveying shaft, and a first driving member 206 is connected to the first screw conveying shaft. When the first driving member 206 is activated, the first driving member 206 drives the first screw conveying shaft to rotate, and the first screw conveying shaft conveys the biomass feedstock into the reactor body 300.

[0101] As a further embodiment, the biomass continuous segmented baking furnace disclosed in the embodiment of the present invention further includes a level meter 310, which is arranged on the reactor body 300 near the feed auger 200, wherein the level meter 310 is electrically connected to the first driving member 206.

[0102] After the material level meter 310 detects the material level in the reaction furnace body 300 , it can transmit a signal to the first driving member 206 . After receiving the signal, the first driving member 206 can be turned on or off, thereby achieving control of the material level in the reaction furnace body 300 .

[0103] It should be noted that the feed auger 200 also includes a heating jacket, which is mounted on the feed auger body 201. A gap is defined between the heating jacket and the feed auger body 201 for admitting hot air. The heating jacket is also provided with a heating medium inlet 204 and a heating medium outlet 205, both of which are connected to the gap. The heating medium inlet 204 is located at the discharge end, while the heating medium outlet 205 is located at the feed end. This arrangement allows for preheating of the biomass feedstock entering the reactor body 300.

[0104] Of course, the specific preheating temperature is not specifically limited in the embodiment of the present invention, and those skilled in the art can select it according to actual needs.

[0105] In order to realize waste gas recycling, the embodiment of the present invention selects the reaction pyrolysis gas after dust removal to heat the feed auger.

[0106] The embodiment of the present invention does not limit the specific structure of the reaction furnace body 300. As long as the structure meets the use requirements of the present invention, it is within the protection scope of the present invention.

[0107] As one of the examples, please refer to Figure 1 and Figure 6 The reactor body 300 disclosed in the embodiment of the present invention includes at least a first-stage reactor body 301 and a second-stage reactor body 302 that are connected to each other, wherein the first-stage reactor body 301 and the second-stage reactor body 302 are arranged in sequence along the vertical direction, the first-stage reactor body 301 is connected to the feeding mechanism, and the second-stage reactor body 302 is connected to the discharging mechanism.

[0108] The first stage reaction furnace body 301 and the second stage reaction furnace body 302 are both provided with at least one hot carrier gas inlet mechanism. In this way, heating by the hot carrier gas mechanism can make different temperature fields at different height stages of the reaction furnace.

[0109] As a specific embodiment, the hot carrier gas intake mechanism disclosed in the embodiment of the present invention includes a first hot carrier gas intake mechanism 303, a second hot carrier gas intake mechanism 304 and a third hot carrier gas intake mechanism 305, wherein the first hot carrier gas intake mechanism 303 is arranged in the first stage reaction furnace body 301, the second hot carrier gas intake mechanism 304 and the third hot carrier gas intake mechanism 305 are both arranged in the second stage reaction furnace body 302, and the third hot carrier gas intake mechanism is arranged at the lower part of the second hot carrier gas intake mechanism 304.

[0110] Different temperature fields can be established by the first hot carrier gas inlet mechanism 303 , the second hot carrier gas inlet mechanism 304 and the third hot carrier gas inlet mechanism 305 .

[0111] The embodiment of the present invention does not limit the specific structure of the first hot carrier gas inlet mechanism 303. As long as the use requirements of the present invention are met, it is within the protection scope of the present invention.

[0112] As one example, please refer to Figure 8 The first hot carrier gas inlet mechanism 303 disclosed in the embodiment of the present invention includes a first hot carrier gas inlet pipe 3031 and a first-level guide cone 3032. The first hot carrier gas inlet pipe 3031 includes a first inlet end and a first outlet end. The first inlet end extends into the interior of a first-stage reaction furnace body 301, and the first outlet end is placed outside the first-stage reaction furnace body 301.

[0113] The first gas outlet end is provided with a first-stage guide cone 3032, and the gas outlet of the first-stage guide cone 3032 is arranged toward the feed auger 200. In this arrangement, the hot carrier gas entering from the first hot carrier gas inlet pipe 3031 is ejected upward.

[0114] As a further example, the outlet of the primary guide cone 3032 disclosed in the embodiment of the present invention is arranged on the central axis of the reactor body 300, wherein the cone angle of the primary guide cone 3032 is 30°-45°. This arrangement allows the airflow to be ejected from the central axis of the reactor body 300, reducing the unevenness of the flow field distribution within the furnace. The setting of the cone angle can also make the impact force of the airflow on the cone surface more evenly distributed, further reducing the risk of damage to the cone surface due to excessive local stress.

[0115] The embodiment of the present invention does not limit the specific structure of the second hot carrier gas inlet mechanism 304. As long as the structure meets the use requirements of the present invention, it falls within the protection scope of the present invention.

[0116] As one example, please refer to Figure 9 The second hot carrier gas inlet mechanism 304 disclosed in the embodiment of the present invention includes a second hot carrier gas inlet pipe 3041 and a secondary guide cone 3042. The second hot carrier gas inlet pipe 3041 includes a second inlet end and a second outlet end. The second inlet end extends into the interior of the second-stage reaction furnace body 302, and the second outlet end is placed outside the second-stage reaction furnace body 302.

[0117] The second air outlet end is provided with a secondary guide cone 3042 , and the air outlet of the secondary guide cone 3042 is arranged toward the feed auger 200 .

[0118] As a further embodiment, the air outlet of the secondary guide cone 3042 disclosed in the embodiment of the present invention is arranged on the central axis of the reactor body 300. With this arrangement, the air flow is ejected from the central axis of the reactor body 300, which can reduce the unevenness of the flow field distribution in the furnace.

[0119] As a further embodiment, the cone angle of the secondary guide cone 3042 disclosed in the embodiment of the present invention is 30°-45°. This configuration can make the impact force of the airflow on the cone surface more evenly distributed, further reducing the risk of damage to the cone surface due to excessive local stress.

[0120] The embodiment of the present invention does not limit the specific structure of the third hot carrier gas inlet mechanism 305. As long as the structure meets the use requirements of the present invention, it is within the protection scope of the present invention.

[0121] As one example, please refer to Figure 10 The third hot carrier gas inlet mechanism 305 disclosed in the embodiment of the present invention is a third hot carrier gas inlet pipe, which includes a third inlet end and a third outlet end. The third inlet end extends into the interior of the second-stage reactor body 302, and the third outlet end is placed outside the second-stage reactor body 302. The outlet of the third outlet end is arranged on the central axis of the reactor body 300, and the outlet of the third outlet end is arranged toward the discharge mechanism. With such an arrangement, the downward directional force of the airflow can directly push the biomass molded fuel in the second-stage reactor body 302 to move toward the discharge mechanism. Since the biomass molded fuel may change in density and decrease in fluidity after the reaction, it is easy to accumulate before discharge, and the directional thrust of the hot carrier gas can ensure that the material enters the discharge mechanism continuously and smoothly.

[0122] There is a preset distance between the third hot carrier gas inlet pipe and the second hot carrier gas inlet pipe 3041 in the height direction of the reaction furnace body 300 .

[0123] As a further embodiment, the biomass continuous segmented baking furnace disclosed in the embodiment of the present invention also includes multiple thermocouples 306, which are arranged on the furnace wall of the reactor body 300 along the height direction of the reactor body 300, wherein the detection end of the thermocouple 306 is placed inside the reactor body 300.

[0124] The thermocouple 306 is arranged opposite to the hot carrier gas inlet mechanism.

[0125] As a specific embodiment, the thermocouple 306 disclosed in the embodiment of the present invention includes a first thermocouple 3061, a second thermocouple 3062, a third thermocouple 3063, a fourth thermocouple 3064, a fifth thermocouple 3065, a sixth thermocouple 3066 and a seventh thermocouple 3067, wherein the first thermocouple 3061 and the second thermocouple 3062 are arranged on a section of the reaction furnace body 301, the height of the first thermocouple 3061 is higher than the first hot carrier gas inlet pipe 3031, and the height of the second thermocouple 3062 is lower than the first hot carrier gas inlet pipe 3031. Such an arrangement can monitor the temperature at different heights of a section of the reaction furnace body 301.

[0126] The third thermocouple 3063, the fourth thermocouple 3064, the fifth thermocouple 3065, the sixth thermocouple 3066, and the seventh thermocouple 3067 are all disposed on the second-stage reactor body 302 and are sequentially arranged along the height of the second-stage reactor body 302. This arrangement allows the temperature at different heights of the second-stage reactor body 302 to be monitored.

[0127] The monitoring point of thermocouple 306 directly faces the area where the hot carrier gas is applied. This structure more accurately captures the impact of the hot carrier gas entering the furnace on the local temperature, providing a more effective basis for hot carrier gas control. For example, if the first thermocouple 3061 detects a temperature anomaly, the inlet condition of the first hot carrier gas inlet pipe 3031 (such as excessively high / low hot carrier temperature or unstable flow) can be directly pinpointed, eliminating the need to investigate unrelated areas and shortening debugging and troubleshooting time.

[0128] The embodiment of the present invention does not limit the specific structures of the first-stage reaction furnace body 301 and the second-stage reaction furnace body 302. As long as the structures meet the use requirements of the present invention, they are within the protection scope of the present invention.

[0129] As one of the examples, please refer to Figure 1 The first-stage reactor body 301 disclosed in the embodiment of the present invention is a single-tube structure, while the second-stage reactor body 302 comprises an inner tube 3021 and an outer tube 3022. The outer tube 3022 is sleeved onto the inner tube 3021, with a gas channel 3023 provided between the inner tube 3021 and the outer tube 3022. This arrangement allows the pyrolysis gas channel to completely enclose the second-stage reactor body 302, forming a pyrolysis gas insulation layer.

[0130] As a further embodiment, the reactor body 300 disclosed in the embodiment of the present invention further includes a ventilation furnace wall 308 , wherein the ventilation furnace wall 308 is disposed in the second-stage reactor body 302 , and the ventilation furnace wall 308 is communicated with the gas channel 3023 .

[0131] The outer cylinder 3022 is further provided with a pyrolysis gas outlet 309 , which is communicated with the gas channel 3023 .

[0132] With this arrangement, the pyrolysis gas can enter the gas channel 3023 through the ventilation furnace wall 308 and be discharged through the pyrolysis gas outlet 309.

[0133] As a specific example, please refer to Figure 11The ventilation furnace wall 308 disclosed in the embodiment of the present invention includes a first screen 3081, a reinforcing rib plate 3083, and a second screen 3082. The reinforcing rib plate 3083 is disposed between the first screen 3081 and the second screen 3082, and the first screen 3081, the reinforcing rib plate 3083, and the second screen 3082 are bonded together. The reinforcing rib plate has a plurality of through holes 3083a formed therein to communicate with the first screen 3081 and the second screen 3082.

[0134] It should be noted that the first-stage reaction furnace body 301 and the second-stage reaction furnace body 302 are connected via a flange 311 . This arrangement can effectively improve the connection strength of the entire reaction furnace body 300 .

[0135] The distance from the flange 311 to the second hot carrier gas inlet pipe 3041 is 1 / 4 of the distance from the first flange 311 to the ventilation furnace wall 308, and the distance from the flange 311 to the third hot carrier gas inlet pipe 305 is 1 / 2 of the distance from the first flange 311 to the ventilation furnace wall 308. This arrangement can form different temperature fields.

[0136] As a further example, please refer to Figure 7 , the embodiment of the present invention discloses a biomass continuous staged baking furnace, the second stage reaction furnace body 302 is further provided with a broken arch plate 312, the broken arch plate 312 is staggered on the inner wall of the second stage reaction furnace body 302.

[0137] The included angle between the arch-breaking plate 312 and the central axis of the reaction furnace body 300 is 30°-45°.

[0138] Because biomass raw materials (such as straw, wood chips, etc.) are prone to form "bridges" (materials support each other to form a suspended structure, with voids appearing below) or local accumulation in the furnace body due to their own shape (fibrous, irregular particles), humidity or mutual adsorption force during the falling or moving process, resulting in interruption of material transportation and discontinuous reaction.

[0139] The staggered arch-breaking plates mentioned above can break up the stable support structure that may be formed by the materials, preventing the occurrence of "bridging" phenomenon; when the materials fall, they will collide with the inclined arch-breaking plates (at an angle of 30°-45°) and be diverted, thus dispersing agglomerated materials and avoiding local accumulation, ensuring that the materials fall evenly and guaranteeing the continuity of the entire baking process.

[0140] Specifically, the vertical distance between two adjacent arch-breaking plates 312 is 3-5 times the length of the biomass feedstock. This arrangement allows the material to change its path multiple times during its descent (similar to a "zigzag motion") due to the obstruction of the arch-breaking plates, extending its residence time within the secondary reactor 302 and ensuring sufficient time for the material to complete the pyrolysis reaction.

[0141] It should be noted that the reactor body 300 disclosed in the embodiment of the present invention also includes an air lock 307, wherein the air lock 307 is arranged at the lower part of the second-stage reactor body 302. The air lock 307 uses the intermittent sealing structure of its rotating impeller (or blades) to briefly open the channel when the biomass molded fuel formed after the reaction passes through, and quickly closes the channel after the material is discharged, which can effectively block the exchange of internal and external airflows, prevent external air from infiltrating or internal high-temperature gas / volatiles from leaking, and ensure the stability of the pressure and atmosphere required for the reaction.

[0142] The embodiment of the present invention does not limit the specific structure of the discharge mechanism. As long as the structure meets the use requirements of the present invention, it is within the protection scope of the present invention.

[0143] As one example, please refer to Figure 12-15 The discharging mechanism disclosed in the embodiment of the present invention includes a discharging bin 400 and a discharging auger 500 . The outlet of the discharging bin 400 is connected to the inlet of the discharging auger 500 , and the outlet of the discharging auger 500 is connected to the outlet of the reaction furnace body 300 .

[0144] The discharging mechanism includes a discharging bin 400 and a discharging auger 500 . The outlet of the discharging bin 400 is connected to the inlet of the discharging auger 500 , and the outlet of the discharging auger 500 is connected to the outlet of the reaction furnace body 300 .

[0145] As a specific embodiment, the discharge bin 400 disclosed in the embodiment of the present invention includes a discharge bin 400 body, a second feeding port 402 and a second discharge port 403 , a third gate valve 404 is provided at the second feeding port 402 , and a fourth gate valve 405 is provided at the second discharge port 403 .

[0146] A second pressure relief pipe 406 and a second pressure charging pipe 407 are respectively provided on both sides of the discharge bin body 401 . A second pressure relief valve is provided in the second pressure relief pipe 406 , and a second pressure charging valve is provided in the second pressure charging pipe 407 .

[0147] When the discharge bin 400 has collected all the materials, the third gate valve 404 is closed, and the receiving bin is unloaded to normal pressure through the second pressure relief pipe 406. The fourth gate valve 405 is opened to unload the materials. When the unloading is completed, the fourth gate valve 405 is closed, and the second charging valve is opened. The discharge bin 400 is replaced and pressurized with nitrogen through the second pressure charging pipe 407. After the pressure reaches the system pressure, the third gate valve 404 is opened.

[0148] It should be noted that the discharging auger 500 is arranged parallel to the horizontal plane.

[0149] As a specific embodiment, the discharge auger 500 disclosed in the embodiment of the present invention further includes a cooling water jacket 504, which is mounted on the discharge auger 500. A water flow channel for cooling water to enter is also provided between the cooling water jacket 504 and the discharge auger 500.

[0150] The cooling water jacket 504 is provided with a cooling water inlet at one end and a condensate outlet at the other. This arrangement allows the material passing through the discharge auger 500 to be cooled by the cooling water before being discharged from the discharge bin 400. This arrangement allows the biomass briquette fuel to be cooled after reaction before being discharged.

[0151] It should be noted that the first driving member 206 and the second driving member 505 are preferably motors.

[0152] The experimental results are described below through four examples and the following table:

[0153] Example 1

[0154] First, the baking furnace system is purged and replaced with nitrogen to make the system an oxygen-free or low-oxygen environment, and then corn straw particles and a small amount of porcelain ball markers are mixed and added to the reaction furnace body 300 of the baking furnace; the system pressure is increased to 0.05MPa, and the input and output amounts are adjusted at the same time to control the material level of the reaction furnace body 300 to establish a dynamic balance of input and output. By adjusting the temperature and flow of the hot carrier gas in each section of the hot carrier gas inlet mechanism, the temperature of the reaction furnace body 300 is set to a pyrolysis constant temperature field, and its temperature field temperature is 240°C.

[0155] Example 2

[0156] First, the baking furnace system is purged and replaced with nitrogen to make the system an oxygen-free or low-oxygen environment, and then corn straw particles and a small amount of porcelain ball markers are mixed and added into the low-temperature baking furnace; the system pressure is increased to 0.05MPa, and the input and output amounts are adjusted at the same time to control the material level of the reaction furnace body 300, establish a dynamic balance of input and output, and set the temperature of the reaction furnace body 300 to two temperature fields by adjusting the temperature and flow of the hot carrier gas in each section of the hot carrier gas inlet mechanism, namely a 250°C pyrolysis volatilization section and a 210°C cooling section.

[0157] Example 3

[0158] First, the baking furnace system is purged and replaced with nitrogen to make the system an oxygen-free or low-oxygen environment, and then corn straw particles and a small amount of porcelain ball markers are mixed and added into the baking furnace; the system pressure is increased to 0.05MPa, and the inlet and outlet amounts are adjusted at the same time to control the material level of the reaction furnace body and establish a dynamic balance of inlet and outlet. By adjusting the temperature and flow of the hot carrier gas in each section of the hot carrier gas inlet mechanism, the temperature of the reaction furnace body 300 is set to four temperature fields, namely: a 210°C drying section, a 260°C pyrolysis volatilization section, a 210°C intermediate cooling section, and a 230°C pyrolysis constant temperature section.

[0159] Example 4

[0160] First, the baking furnace system is purged and replaced with nitrogen to make the system an oxygen-free or low-oxygen environment, and then corn straw particles and a small amount of porcelain ball markers are mixed and added into the baking furnace; the system pressure is increased to 0.05MPa, and the input and output amounts are adjusted at the same time to control the material level of the reaction furnace body 300, establish a dynamic balance of input and output, and set the temperature of the reaction furnace body 300 to four temperature fields by adjusting the temperature and flow of the hot carrier gas in each section of the hot carrier gas inlet mechanism, namely: a 200°C drying section, a 250°C pyrolysis volatilization section, a 220°C pyrolysis constant temperature section, and a 180°C cooling section.

[0161]

[0162] It can be seen from the data in the above table that the reaction furnace body 300 can be adjusted to a uniform temperature system as in Example 1, or the temperature of the reaction furnace body 300 can be adjusted to a two-stage temperature system as in Example 2, or a four-stage temperature system as in Example 3. At the same time, we can also add a low-temperature cooling section between the two high-temperature sections, as in Example 3.

[0163] The above embodiments illustrate that the biomass continuous segmented baking furnace has strong temperature controllability and can be fitted into a temperature system suitable for pyrolysis of different types of biomass through multi-segment temperature fields.

[0164] Finally, it should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprises" or any other variation thereof is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0165] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0166] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A biomass continuous segmented baking furnace, characterized in that: include: Feeding mechanism, used for feeding biomass raw materials; a reaction furnace body, connected to the outlet of the feeding mechanism, the reaction furnace body comprising at least one reaction furnace body section and a second reaction furnace body section, each reaction furnace body section being provided with at least one hot carrier gas inlet mechanism along its height direction, the different hot carrier gas inlet mechanisms being used to input hot carrier gases of the same or different temperatures and flow rates into the reaction furnace body, so that the reaction furnace body has different temperature fields along its height direction; The discharging mechanism is connected to the outlet of the reaction furnace body and is used for receiving the biomass briquette fuel after the reaction of the reaction furnace body and unloading the biomass briquette fuel.

2. The biomass continuous segmented baking furnace according to claim 1, characterized in that: The feeding mechanism includes a feeding bin and a feeding auger. The outlet of the feeding bin is connected to the inlet of the feeding auger. The outlet of the feeding auger is connected to the inlet of the reaction furnace body.

3. The biomass continuous segmented baking furnace according to claim 2, characterized in that: The feed bin includes a feed bin body, a first feeding port and a first discharge port, wherein the first feeding port is provided with a first gate valve, and the first discharge port is provided with a second gate valve; A first pressure relief pipe and a first pressure charging pipe are respectively provided on both sides of the feed bin body. A first pressure relief valve is provided in the first pressure relief pipe, and a first pressure charging valve is provided in the first pressure charging pipe.

4. The biomass continuous segmented baking furnace according to claim 2, characterized in that: The feeding auger is arranged obliquely, and the angle between the central axis of the feeding auger and the horizontal plane is 50°-70°.

5. The biomass continuous segmented baking furnace according to claim 4, characterized in that: The feed auger includes a first driving member, a feed auger body, a feed end and a discharge end, wherein the feed end and the discharge end are respectively arranged at two ends of the feed auger body, and the feed end is arranged lower than the discharge end; The feeding auger includes a feeding shell and a first screw conveying shaft, and the first driving member is connected to the first screw conveying shaft.

6. The biomass continuous segmented baking furnace according to claim 5, characterized in that: It also includes a material level meter, which is arranged on the reactor body near the feeding auger; The material level meter is electrically connected to the first driving member.

7. The biomass continuous segmented baking furnace according to claim 5, characterized in that: The feed auger further comprises a heating sleeve, which is provided on the feed auger body, and a gap for filling hot air is provided between the heating sleeve and the feed auger body; The heating sleeve is also provided with a heating medium inlet and a heating medium outlet, both of which are connected to the gap. The heating medium inlet is provided at the discharge end, and the heating medium outlet is provided at the feed end.

8. The biomass continuous segmented baking furnace according to claim 1, characterized in that: The reaction furnace body at least includes a first-stage reaction furnace body and a second-stage reaction furnace body that are connected to each other, the first-stage reaction furnace body and the second-stage reaction furnace body are arranged in sequence along the vertical direction, the first-stage reaction furnace body is connected to the feeding mechanism, and the second-stage reaction furnace body is connected to the discharging mechanism; The first-stage reaction furnace body and the second-stage reaction furnace body are both provided with at least one hot carrier gas inlet mechanism.

9. The biomass continuous segmented baking furnace according to claim 4, characterized in that: The hot carrier gas intake mechanism includes a first hot carrier gas intake mechanism, a second hot carrier gas intake mechanism and a third hot carrier gas intake mechanism; The first hot carrier gas inlet mechanism is arranged in the first stage reaction furnace body, the second hot carrier gas inlet mechanism and the third hot carrier gas inlet mechanism are both arranged in the second stage reaction furnace body, and the third hot carrier gas inlet mechanism is arranged below the second hot carrier gas inlet mechanism.

10. The biomass continuous segmented baking furnace according to claim 9, characterized in that: The first hot carrier gas inlet mechanism includes a first hot carrier gas inlet pipe and a first-stage guide cone, the first hot carrier gas inlet pipe includes a first inlet end and a first outlet end, the first inlet end extends into the interior of the first stage reaction furnace body, and the first outlet end is located outside the first stage reaction furnace body; The first air outlet end is provided with a first-level guide cone, and the air outlet of the first-level guide cone is arranged toward the feed auger.

11. The biomass continuous segmented baking furnace according to claim 10, characterized in that: The gas outlet of the first-stage guide cone is arranged on the central axis of the reactor body; The cone angle of the first-level guide cone is 30°-45°.

12. The biomass continuous segmented roasting furnace according to claim 9, characterized in that: The second hot carrier gas inlet mechanism includes a second hot carrier gas inlet pipe and a secondary guide cone, the second hot carrier gas inlet pipe includes a second inlet end and a second outlet end, the second inlet end extends into the interior of the second-stage reaction furnace body, and the second outlet end is located outside the second-stage reaction furnace body; The second air outlet end is provided with a secondary guide cone, and the air outlet of the secondary guide cone is arranged toward the feed auger.

13. The biomass continuous segmented roasting furnace according to claim 12, characterized in that: The gas outlet of the secondary guide cone is arranged on the central axis of the reactor body; The cone angle of the secondary guide cone is 30°-45°.

14. The biomass continuous segmented roasting furnace according to claim 9, characterized in that: The third hot carrier gas inlet mechanism is a third hot carrier gas inlet pipe, and the third hot carrier gas inlet pipe includes a third inlet end and a third outlet end, the third inlet end extends into the interior of the second-stage reaction furnace body, and the third outlet end is located outside the second-stage reaction furnace body; The gas outlet of the third gas outlet end is arranged on the central axis of the reaction furnace body, and the gas outlet of the third gas outlet end is arranged toward the discharge mechanism; There is a preset distance between the third hot carrier gas inlet pipe and the second hot carrier gas inlet pipe in the height direction of the reaction furnace body.

15. The biomass continuous segmented baking furnace according to claim 4, characterized in that: It also includes a plurality of thermocouples, which are arranged on the furnace wall of the reaction furnace along the height direction of the reaction furnace body, and the detection ends of the thermocouples are placed inside the reaction furnace body; The thermocouple is arranged opposite to the hot carrier gas inlet mechanism.

16. The biomass continuous segmented roasting furnace according to claim 1, characterized in that: The first stage reaction furnace body is a single-tube structure; The second-stage reaction furnace body includes an inner cylinder and an outer cylinder. The outer cylinder is sleeved on the inner cylinder, and a gas channel is provided between the inner cylinder and the outer cylinder.

17. The biomass continuous segmented roasting furnace according to claim 16, characterized in that: The reaction furnace body further includes a ventilation furnace wall, which is arranged in the second-stage reaction furnace body and is connected to the gas channel; The outer cylinder is further provided with a pyrolysis gas outlet, which is communicated with the gas channel.

18. The biomass continuous segmented roasting furnace according to claim 17, characterized in that: The ventilation furnace wall includes a first screen, a reinforcing rib plate and a second screen, wherein the reinforcing rib plate is arranged between the first screen and the second screen, and the first screen, the reinforcing rib plate and the second screen are bonded together; The reinforcing plate ribs are provided with a plurality of through holes for communicating with the first screen and the second screen.

19. The biomass continuous segmented roasting furnace according to claim 17, characterized in that: The first stage reaction furnace body and the second stage reaction furnace body are connected by flanges; The distance from the flange to the second hot carrier gas inlet pipe is 1 / 4 of the distance from the flange to the ventilation furnace wall; The distance from the flange to the third hot carrier gas inlet pipe is 1 / 2 of the distance from the flange to the ventilation furnace wall.

20. The biomass continuous segmented roasting furnace according to claim 8, characterized in that: The second stage reaction furnace body is further provided with an arch-breaking plate, and the arch-breaking plate is staggeredly arranged on the inner wall of the second stage reaction furnace body; The angle between the arch-breaking plate and the central axis of the reactor body is 30°-45°; The vertical distance between two adjacent broken arch plates is 3-5 times the length of the biomass raw material.

21. The biomass continuous segmented roasting furnace according to claim 4, characterized in that: The discharging mechanism includes a discharging bin and a discharging auger. The outlet of the discharging bin is connected to the inlet of the discharging auger, and the outlet of the discharging auger is connected to the outlet of the reaction furnace body.

22. The biomass continuous segmented roasting furnace according to claim 21, characterized in that: The discharge bin includes a discharge bin body, a second feeding port and a second discharge port, the second feeding port is provided with a third gate valve, and the second discharge port is provided with a fourth gate valve; A second pressure relief pipe and a second punching pipe are respectively provided on both sides of the discharge bin body. A second pressure relief valve is provided in the second pressure relief pipe, and a second pressure charging valve is provided in the second pressure charging pipe.

23. The biomass continuous segmented roasting furnace according to claim 22, characterized in that: The discharging auger is arranged parallel to the horizontal plane; The discharging auger further comprises a cooling water jacket, which is mounted on the discharging auger, and a water flow channel for cooling water to enter is provided between the cooling water jacket and the discharging auger; One end of the cooling water jacket is provided with a cooling water inlet, and the other end is provided with a condensed water outlet.

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