Pyrolytic carbonization system

Abstract

This utility model provides a pyrolysis carbonization system, comprising: a feeding assembly having a material inlet and a material outlet; a pyrolysis carbonization assembly including a pyrolysis carbonization furnace having a pyrolysis carbonization chamber and a heating chamber, one end of the pyrolysis carbonization chamber having a pyrolysis carbonization inlet, and the other end having a pyrolysis carbonization outlet and a flue gas outlet, the pyrolysis carbonization inlet being positioned higher than the pyrolysis carbonization outlet and connected to the material outlet, the heating chamber having a heating inlet and a heating outlet; a heating assembly including a burner having a gas inlet and a gas outlet; and a purification assembly including a dry deacidification tower, a dust collector, and a wet deacidification tower, the dry deacidification tower having a purification inlet, and the inlet of the dust collector being connected to the outlet of the dry deacidification tower. The technical solution provided by this application can solve the problems of low efficiency, frequent maintenance, and serious environmental pollution caused by existing pyrolysis carbonization systems.

Description

Technical Field

[0001] This utility model relates to the technical field of pyrolysis carbonization systems, and more specifically, to a pyrolysis carbonization system. Background Technology

[0002] In the field of biomass energy conversion, pyrolysis carbonization technology is an important approach that can convert biomass into biochar, while simultaneously producing pyrolysis gas and a small amount of tar as byproducts. Most biomass has a high carbon and oxygen content; generally, the carbon content is typically 40%–55%, the oxygen content 40%–50%, the ammonia content 5%–7%, the nitrogen content is generally around 1%, and the sulfur content is around 0.2%, with a calorific value of 14–19 MJ / kg. Overall, biomass feedstocks have a higher volatile matter content and lower fixed carbon and ash content.

[0003] In existing technologies, the pyrolysis and carbonization processes are separated into two operation steps. This makes the operation of the pyrolysis and carbonization system complex, resulting in low pyrolysis efficiency. Furthermore, the flue gas contains a large amount of tar, which can easily cause the flue to become clogged, increasing maintenance costs and causing serious environmental pollution.

[0004] For example, patent application number 201410290456.6 provides a continuous pyrolysis and carbonization device for agricultural and forestry biomass. Specifically, it mentions that the dried biomass raw materials are fed into the pyrolysis feed hopper by a conveying mechanism, and are simultaneously pyrolyzed and transported to the carbonization device by a screw conveyor in the pyrolysis pipe; the pyrolysis semi-coke enters the carbonization device for full carbonization; the volatiles produced by biomass pyrolysis and semi-coke carbonization are discharged together from the gas outlet at the top of the carbonization device, enter the condenser for cooling, and obtain tar, wood vinegar and pyrolysis gas; the pyrolysis gas returns to the combustion furnace for combustion through a three-way valve, and the generated high-temperature flue gas enters the pyrolysis device and carbonization device for heating; the high-temperature flue gas is discharged from the pyrolysis device and carbonization device, becomes medium-temperature flue gas, enters the drying box as a drying medium for biomass raw materials, and is then discharged as tail gas. The patent document describes a process where biomass is first pyrolyzed and then carbonized, which leads to complex operation of the pyrolysis and carbonization system, low pyrolysis efficiency, and the screw conveyor is prone to damage during the high-temperature operation of the pyrolysis tube, increasing maintenance costs. Furthermore, the direct emission of exhaust gas will cause serious environmental pollution. Utility Model Content

[0005] This invention provides a pyrolysis carbonization system to solve the problems of low efficiency, frequent maintenance, and serious environmental pollution caused by existing pyrolysis carbonization systems.

[0006] This utility model provides a pyrolysis carbonization system, comprising: a feeding assembly having a material inlet and a material outlet; and a pyrolysis carbonization assembly including a pyrolysis carbonization furnace having an independently arranged pyrolysis carbonization chamber and a heating chamber. One end of the pyrolysis carbonization chamber has a pyrolysis carbonization inlet, and the other end has a pyrolysis carbonization outlet and a flue gas outlet. The pyrolysis carbonization chamber is inclined, with the pyrolysis carbonization inlet positioned higher than the pyrolysis carbonization outlet. The pyrolysis carbonization inlet is connected to the material outlet. The heating chamber has a heating inlet and a heating outlet arranged opposite to each other. Fluid within the heating chamber is used to heat the material within the pyrolysis carbonization chamber. Heating is performed; the heating component includes a burner with a gas inlet and a gas outlet, the gas inlet being connected to the flue gas outlet and the gas outlet being connected to the heating inlet; the purification component includes a dry desulfurization tower, a dust collector, and a wet desulfurization tower, the dry desulfurization tower having a purification inlet connected to the heating outlet, the dry desulfurization tower being used to remove acidic gases from the flue gas, the dust collector having an inlet connected to the outlet of the dry desulfurization tower being used to remove dust from the flue gas, and the wet desulfurization tower having an inlet connected to the outlet of the dust collector being used to remove acidic gases from the flue gas, and the wet desulfurization tower being used to discharge the purified gas.

[0007] Furthermore, the pyrolysis carbonization system also includes a drying component, which includes a drying furnace. One end of the drying furnace has a feed inlet and a drying outlet that are interconnected, and the other end of the drying furnace has a discharge outlet and a drying inlet that are interconnected. The drying furnace is inclined, with the feed inlet positioned higher than the discharge outlet. The feed inlet is connected to the material outlet, the drying outlet is connected to the purification inlet, the discharge outlet is connected to the pyrolysis carbonization inlet, and the drying inlet is connected to the heating outlet.

[0008] Furthermore, the pyrolysis carbonization system also includes: a conveying structure having a conveying cavity having a conveying inlet and a conveying outlet arranged opposite to each other, the conveying inlet being connected to the discharge port, the conveying outlet being connected to the pyrolysis carbonization inlet, and a spiral structure being provided inside the conveying cavity for driving the material to move from the conveying inlet to the conveying outlet.

[0009] Furthermore, the pyrolysis carbonization furnace includes: a pyrolysis carbonization cylinder having a pyrolysis carbonization chamber, a pyrolysis carbonization inlet, a pyrolysis carbonization outlet, and a flue gas outlet; and a heating cylinder sleeved on the outside of the pyrolysis carbonization cylinder, with a heating chamber between the heating cylinder and the pyrolysis carbonization cylinder, and a heating inlet and a heating outlet provided on the heating cylinder, the heating inlet and the heating outlet being respectively located at both ends of the heating cylinder along the extension direction of the pyrolysis carbonization chamber, the heating inlet being located closer to the pyrolysis carbonization outlet than the heating outlet, and the heating inlet being located below the heating outlet.

[0010] Furthermore, the pyrolysis carbonization system also includes a cooling assembly, which includes a cooler having a cooling inlet and a cooling outlet arranged opposite to each other. The cooling inlet is connected to the pyrolysis carbonization outlet. The cooler is used to cool the biochar discharged from the pyrolysis carbonization outlet, and the cooling outlet is used to discharge the biochar.

[0011] Furthermore, the cooler includes: a body having a cooling chamber having a cooling inlet and a cooling outlet, and a temperature detection element being installed inside the cooling chamber; a jet pipe communicating with the cooling chamber and used to discharge inert gas into the cooling chamber; and a cooling pipe used to cool the cooling chamber.

[0012] Furthermore, the pyrolysis carbonization system also includes: a control valve installed at the flue gas outlet; a first pipeline, one end of which is connected to the control valve, and the other end of which is connected to the gas inlet; a second pipeline, one end of which is connected to the control valve, the control valve being used to control the connection between the flue gas outlet and the first and second pipelines; and a collection assembly, which includes a water scrubbing tower and a storage tank, the inlet of which is connected to the other end of the second pipeline, and the outlet of which is connected to the inlet of the storage tank.

[0013] Furthermore, the collection assembly also includes: a heat exchange structure, the inlet of which is connected to the outlet of the water washing tower, the heat exchange structure being used to cool the gas, and the outlet of which is connected to the inlet of the storage tank; and a pressure stabilizing structure, the inlet of which is connected to the outlet of the storage tank, the pressure stabilizing structure being used to control the gas pressure.

[0014] Furthermore, the feeding assembly includes: a feeding hopper having a material inlet; a pusher having a housing and a push rod, the housing having a pushing chamber having a material outlet at one end, the inlet of the pushing chamber communicating with the outlet of the feeding hopper, and the push rod being movably disposed at the other end of the pushing chamber for pushing the material in the pushing chamber to move to the material outlet.

[0015] Furthermore, the material inlet is located above the outlet of the feed hopper, and the cross-sectional area of ​​the feed hopper gradually decreases along the direction from the material inlet to the outlet of the feed hopper; the pusher is inclined, and the inlet of the pusher chamber is set higher than the material outlet.

[0016] Applying the technical solution of this utility model, the material is conveyed to the pyrolysis and carbonization chamber through the feeding assembly. The pyrolysis and carbonization furnace pyrolyzes and carbonizes the material. The flue gas generated in the pyrolysis and carbonization chamber is conveyed to the burner for combustion, generating high-temperature gas. The high-temperature gas is then conveyed to the heating chamber to heat the material in the pyrolysis and carbonization chamber. The dry deacidification tower, dust collector, and wet deacidification tower of the purification assembly purify the gas discharged from the heating outlet. This configuration, with its independently set pyrolysis and carbonization chamber and heating chamber, avoids direct contact between the heat source and the material, thus reducing the probability of tar formation. This prevents tar from clogging the flue and avoids maintenance of the pyrolysis and carbonization furnace. Simultaneously, the inclined setting of the pyrolysis and carbonization chamber and the height difference between the inlet and outlet facilitate uniform movement and pyrolysis of the material within the chamber, improving the pyrolysis and carbonization efficiency. Furthermore, this configuration eliminates the need for additional structures to drive material flow, simplifying the structure and further reducing maintenance of the pyrolysis and carbonization furnace. The gas inlet of the burner in the heating assembly is connected to the flue gas outlet of the pyrolysis and carbonization chamber, allowing the flue gas generated from pyrolysis to be reused as a heat source. This not only improves energy utilization efficiency and reduces energy consumption but also reduces the demand for external fuel, lowering operating costs. The purification assembly includes a dry deacidification tower, a dust collector, and a wet deacidification tower, forming a complete flue gas purification process. The dry deacidification tower first removes most of the acidic gases from the flue gas, followed by dust removal by the dust collector, and finally, the wet deacidification tower further removes residual acidic gases, ensuring that the flue gas meets environmental standards before emission and reducing environmental pollution. Furthermore, with the above structure, the material continuously enters the pyrolysis and carbonization chamber, allowing for complete pyrolysis in an oxygen-deficient environment. This avoids incomplete pyrolysis or combustion caused by excess oxygen, ensuring continuous operation and stability of the system. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0018] Figure 1 A schematic diagram of a pyrolysis carbonization system according to Embodiment 1 of the present invention is shown;

[0019] Figure 2 It shows Figure 1 A magnified view of a section at point A in the middle;

[0020] Figure 3 It shows Figure 1 A magnified view of a section at point B in the middle;

[0021] Figure 4 It shows Figure 1 A magnified view of a section at point C;

[0022] Figure 5 It shows Figure 1 A magnified view of a section at point E in the middle;

[0023] Figure 6 A schematic diagram of a pyrolysis carbonization system according to Embodiment 2 of this utility model is shown;

[0024] Figure 7 It shows Figure 6 A magnified view of a section at point D;

[0025] Figure 8 It shows Figure 6 A magnified view of a section at point F.

[0026] The above figures include the following reference numerals:

[0027] 10. Feeding assembly;

[0028] 11. Feed hopper; 111. Material inlet;

[0029] 12. Feeder; 121. Material outlet;

[0030] 20. Pyrolysis carbonization components; 21. Pyrolysis carbonization furnace;

[0031] 211. Pyrolysis and carbonization cylinder; 2111. Pyrolysis and carbonization inlet; 2112. Pyrolysis and carbonization outlet; 2113. Flue gas outlet;

[0032] 212. Heating cylinder; 2121. Heating chamber; 2122. Heating inlet; 2123. Heating outlet;

[0033] 30. Heating components; 31. Burner;

[0034] 40. Purification components; 41. Dry deacidification tower; 42. Dust collector; 43. Wet deacidification tower;

[0035] 50. Drying components;

[0036] 51. Drying oven; 511. Feed inlet; 512. Drying outlet; 513. Discharge outlet; 514. Drying inlet;

[0037] 60. Conveying structure; 61. Conveying chamber; 611. Conveying inlet; 612. Conveying outlet; 62. Spiral structure;

[0038] 70. Cooling assembly; 71. Cooler; 711. Cooling outlet;

[0039] 81. First pipeline; 82. Second pipeline;

[0040] 90. Collection components; 91. Water washing tower; 92. Storage tank; 93. Heat exchange structure; 94. Pressure stabilizing structure. Detailed Implementation

[0041] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0042] like Figures 1 to 5 As shown, Embodiment 1 of this application provides a pyrolysis carbonization system, which includes a feeding assembly 10, a pyrolysis carbonization assembly 20, a heating assembly 30, and a purification assembly 40. The feeding assembly 10 has a material inlet 111 and a material outlet 121. The pyrolysis carbonization assembly 20 includes a pyrolysis carbonization furnace 21, which has a pyrolysis carbonization chamber and a heating chamber 2121 that are independently arranged. One end of the pyrolysis carbonization chamber has a pyrolysis carbonization inlet 2111, and the other end has a pyrolysis carbonization outlet 2112 and a flue gas outlet 2113. The pyrolysis carbonization chamber is inclined, with the pyrolysis carbonization inlet 2111 positioned higher than the pyrolysis carbonization outlet 2112. The pyrolysis carbonization inlet 2111 is connected to the material outlet 121. The heating chamber 2121 has a heating inlet 2122 and a heating outlet 2123 that are arranged opposite to each other. The fluid in the heating chamber 2121 is used to heat the material in the pyrolysis carbonization chamber. The heating assembly 30 includes a burner 31, which has a gas inlet and a gas outlet. The gas inlet is connected to the flue gas outlet 2113, and the gas outlet is connected to the heating inlet 2122. The purification assembly 40 includes a dry desulfurization tower 41, a dust collector 42, and a wet desulfurization tower 43. The dry desulfurization tower 41 has a purification inlet connected to the heating outlet 2123. The dry desulfurization tower 41 is used to remove acidic gases from the flue gas. The inlet of the dust collector 42 is connected to the outlet of the dry desulfurization tower 41, and the dust collector 42 is used to remove dust from the flue gas. The inlet of the wet desulfurization tower 43 is connected to the outlet of the dust collector 42, and the wet desulfurization tower 43 is used to remove acidic gases from the flue gas and to discharge the purified gas. In this application, the material is biomass. Figure 1 The hollow arrows represent the flow direction of the flue gas, while the solid arrows represent the flow direction of the material. Specifically, in this application, the dust collector 42 is a bag filter 42, and the flue gas is pyrolysis gas.

[0043] Using the technical solution of this application, the material is conveyed to the pyrolysis carbonization chamber through the feeding assembly 10. The pyrolysis carbonization furnace 21 pyrolyzes and carbonizes the material. The flue gas generated in the pyrolysis carbonization chamber is conveyed to the burner 31 for combustion and generates high-temperature gas. The high-temperature gas is conveyed to the heating chamber 2121 to heat the material in the pyrolysis carbonization chamber. The dry deacidification tower 41, dust collector 42, and wet deacidification tower 43 of the purification assembly 40 purify the gas discharged from the heating outlet 2123. With this configuration, the pyrolysis carbonization furnace 21 uses independently arranged pyrolysis carbonization chambers and heating chambers 2121. This indirect heat exchange mode avoids direct contact between the heat source and the material, thereby reducing the probability of tar formation. This prevents tar from clogging the flue and avoids maintenance of the pyrolysis carbonization furnace 21. Meanwhile, the inclined design of the pyrolysis carbonization chamber and the height difference between the inlet and outlet facilitate uniform movement and pyrolysis of materials within the chamber, improving pyrolysis carbonization efficiency. Furthermore, this design eliminates the need for additional structures to drive material flow, simplifying the structure and further reducing maintenance of the pyrolysis carbonization furnace 21. The gas inlet of the burner 31 in the heating assembly 30 is connected to the flue gas outlet 2113 of the pyrolysis carbonization chamber, allowing the flue gas generated during pyrolysis to be reused as a heat source. This not only improves energy utilization efficiency and reduces energy consumption but also reduces the need for external fuel, lowering operating costs. The purification assembly 40 includes a dry deacidification tower 41, a dust collector 42, and a wet deacidification tower 43, forming a complete flue gas purification process. The dry deacidification tower 41 first removes most of the acidic gases from the flue gas, followed by dust removal by the dust collector 42, and finally, the wet deacidification tower 43 further removes residual acidic gases, ensuring that the flue gas meets environmental standards before emission and reducing environmental pollution. Furthermore, by adopting the above structure, the material continuously enters the pyrolysis and carbonization chamber, and the material can be fully pyrolyzed in an oxygen-deficient environment, avoiding incomplete pyrolysis or combustion caused by excess oxygen, thus ensuring the continuous operation and stability of the system.

[0044] Specifically, in this application, the pyrolysis carbonization furnace 21 is designed based on a traditional rotary kiln system, inheriting its strong material adaptability, and adopts a fully enclosed integrated indirect heat exchange mode, resulting in high heat exchange efficiency. Furthermore, the pyrolysis carbonization temperature of the pyrolysis carbonization furnace 21 is maintained at 650-900℃, and the material residence time in the pyrolysis carbonization chamber is approximately 60 minutes.

[0045] The specific process selection for the combustion flue gas purification system depends on the content of specific components in the flue gas. The main purpose is to remove the content of harmful components in the flue gas and achieve emission standards.

[0046] In this application, during the initial pyrolysis process, gas can be supplied to the burner 31 to provide high-temperature gas to the heating chamber 2121. The burner 31 can be a hot air furnace.

[0047] like Figure 3As shown, the pyrolysis carbonization furnace 21 includes a pyrolysis carbonization cylinder 211 and a heating cylinder 212. The pyrolysis carbonization cylinder 211 has a pyrolysis carbonization chamber, a pyrolysis carbonization inlet 2111, a pyrolysis carbonization outlet 2112, and a flue gas outlet 2113. The heating cylinder 212 is sleeved on the outside of the pyrolysis carbonization cylinder 211, and a heating chamber 2121 is formed between the heating cylinder 212 and the pyrolysis carbonization cylinder 211. The heating cylinder 212 is provided with a heating inlet 2122 and a heating outlet 2123. The heating inlet 2122 and the heating outlet 2123 are respectively arranged at both ends of the heating cylinder 212 along the extension direction of the pyrolysis carbonization chamber. The heating inlet 2122 is arranged closer to the pyrolysis carbonization outlet 2112 than the heating outlet 2123, and the heating inlet 2122 is located below the heating outlet 2123.

[0048] This design of the heating chamber 2121 ensures that heat is evenly distributed around the pyrolysis carbonization cylinder 211, avoiding the uneven heat distribution problems that may occur with direct heating. This improves the efficiency of the pyrolysis carbonization process and ensures uniform heating of the material, guaranteeing the full progress of the pyrolysis carbonization reaction. The indirect heating method reduces the direct exposure of the pyrolysis carbonization cylinder 211 to the high-temperature environment, reducing the thermal shock and stress on the cylinder during material pyrolysis, thus extending the service life of the pyrolysis carbonization cylinder 211 and reducing equipment maintenance costs. Furthermore, in this application, the material moves towards the heat source, further enhancing the heating effect on the pyrolysis carbonization chamber.

[0049] like Figure 1 and Figure 3 As shown, the pyrolysis carbonization system further includes a cooling assembly 70. The cooling assembly 70 includes a cooler 71, which has a cooling inlet and a cooling outlet 711 disposed opposite to each other. The cooling inlet is connected to the pyrolysis carbonization outlet 2112. The cooler 71 is used to cool the biochar discharged from the pyrolysis carbonization outlet 2112, and the cooling outlet 711 is used to discharge the biochar.

[0050] With this configuration, the cooler 71 can quickly cool the high-temperature biochar discharged from the pyrolysis carbonization outlet 2112 to a safe temperature, avoiding the risk of smoldering during subsequent processing and improving the safety of operators and the safety of biochar storage.

[0051] Specifically, biochar can be used in green metallurgy and the production of activated carbon.

[0052] The cooler 71 includes a main body, a jet pipe, and a cooling pipe. The main body has a cooling chamber with a cooling inlet and a cooling outlet 711, and a temperature detection element is installed inside the cooling chamber. The jet pipe is connected to the cooling chamber and is used to discharge inert gas into the cooling chamber. The cooling pipe is used to cool the cooling chamber.

[0053] This configuration allows the cooling pipes to cool the cooling chamber using an external cooling medium, such as water or air, rapidly reducing the temperature inside and thus quickly cooling the biochar, improving cooling efficiency. The jet pipes discharge inert gases, such as nitrogen, into the cooling chamber, creating a protective atmosphere during cooling. This prevents the biochar from contacting oxygen in the air, thus preventing oxidation or re-combustion during cooling and improving the safety of the cooling process. Temperature detection elements within the cooling chamber monitor the temperature in real time. The control system adjusts the flow rate of the cooling medium and the amount of inert gas emitted, achieving precise control of the cooling process and ensuring the biochar cools to the ideal temperature range, avoiding overcooling or uneven cooling.

[0054] like Figure 1 , Figure 3 and Figure 5 As shown, the pyrolysis carbonization system also includes a control valve, a first pipeline 81, a second pipeline 82, and a collection assembly 90. The control valve is located at the flue gas outlet 2113. One end of the first pipeline 81 is connected to the control valve, and the other end is connected to the gas inlet. One end of the second pipeline 82 is connected to the control valve, which controls the connection between the flue gas outlet 2113 and the first and second pipelines 81 and 82. The collection assembly 90 includes a water scrubbing tower 91 and a storage tank 92. The inlet of the water scrubbing tower 91 is connected to the other end of the second pipeline 82, and the outlet of the water scrubbing tower 91 is connected to the inlet of the storage tank 92.

[0055] This configuration allows the control valve to flexibly control the connection between the flue gas outlet 2113 and the first pipeline 81 or the second pipeline 82 according to actual conditions, thereby achieving automatic regulation and management of the flue gas and improving the automation level of the pyrolysis carbonization system. When the control valve connects the flue gas outlet 2113 to the second pipeline 82, the flue gas first passes through the water washing tower 91. The water washing tower 91 can effectively collect and remove trace amounts of tar and other soluble and condensable components from the flue gas. Subsequently, the non-condensable combustible gases in the flue gas are further collected and stored in the storage tank 92. This purification process ensures the cleanliness of the collected flue gas, facilitating subsequent use.

[0056] Furthermore, the collection assembly 90 also includes a heat exchange structure 93 and a pressure stabilizing structure 94. The inlet of the heat exchange structure 93 is connected to the outlet of the water washing tower 91, and the heat exchange structure 93 is used to cool the gas. The outlet of the heat exchange structure 93 is connected to the inlet of the storage tank 92. The pressure stabilizing structure 94 is connected to the outlet of the storage tank 92, and the pressure stabilizing structure 94 is used to control the gas pressure.

[0057] This configuration, with heat exchange structure 93 connected to water washing tower 91, further cools the gas exiting water washing tower 91, converting its heat into usable thermal energy, such as for preheating feed, heating other process media, or utilizing as waste heat, thereby improving the system's energy efficiency. The combination of preliminary cooling from water washing tower 91 and secondary cooling from heat exchange structure 93 effectively removes moisture and soluble impurities from the pyrolysis gas, while simultaneously lowering its temperature to facilitate subsequent storage and transportation, reducing potential chemical reactions at high temperatures and maintaining its stability. The design of pressure stabilizing structure 94 ensures gas stability during delivery to other devices, preventing safety issues.

[0058] In this application, the heat exchange structure 93 is an indirect water-cooled structure.

[0059] like Figure 1 and Figure 2 As shown, the feeding assembly 10 includes a feeding hopper 11 and a pusher 12. The feeding hopper 11 has a material inlet 111. The pusher 12 has a housing and a pusher rod. The housing has a pushing chamber, one end of which has a material outlet 121. The inlet of the pushing chamber is connected to the outlet of the feeding hopper 11. The pusher rod is movably disposed at the other end of the pushing chamber and is used to push the material in the pushing chamber to the material outlet 121.

[0060] This configuration allows the feed hopper 11 to pre-store a certain amount of material to be pyrolyzed and carbonized, acting as a buffer to prevent flow interruptions or excessive concentration during the feeding process. This ensures the material continuously and stably enters the pusher 12 and then the pyrolysis and carbonization assembly 20, improving the system's continuous operation and stability. The design of the pusher 12's shell and pushing chamber effectively ensures the sealing of the feeding area, preventing backflow of high-temperature gas or flue gas from the pyrolysis and carbonization chamber. Simultaneously, it ensures the pushing process takes place in an oxygen-deficient environment, reducing tar formation.

[0061] Furthermore, to ensure the sealing of the feeding chamber, the feeder 12 is equipped with a liftable baffle at the tail.

[0062] Optionally, the feeding assembly 10 can also adopt a screw feeding method. During operation, the screw feeder is always filled with material, and a valve is installed at the screw outlet.

[0063] Specifically, the material inlet 111 is located above the outlet of the feed hopper 11, and the cross-sectional area of ​​the feed hopper 11 gradually decreases from the material inlet 111 to the outlet of the feed hopper 11. The pusher 12 is inclined, and the inlet of the pusher chamber is higher than the material outlet 121. The gradually decreasing cross-sectional area design of the feed hopper 11 helps the material to be evenly dispersed in the early stage of entering the pyrolysis and carbonization system, reducing the possibility of material blockage or accumulation and ensuring that the material can smoothly enter the pusher chamber. The material inlet 111 is located above the outlet of the feed hopper 11, and the material can naturally slide down into the pusher chamber by gravity without the need for additional power input, saving energy consumption. Furthermore, the fact that the inlet of the pusher chamber is higher than the material outlet 121, combined with the inclined design, helps the material slide to the material outlet 121, further saving energy consumption.

[0064] like Figures 6 to 8 As shown, Embodiment 2 of this application provides a pyrolysis carbonization system, which differs from Embodiment 1 in that: the pyrolysis carbonization system further includes a drying component 50, the drying component 50 includes a drying furnace 51, one end of the drying furnace 51 has a feed inlet 511 and a drying outlet 512 that are interconnected, the other end of the drying furnace 51 has a discharge outlet 513 and a drying inlet 514 that are interconnected, the drying furnace 51 is inclined, the feed inlet 511 is set higher than the discharge outlet 513, the feed inlet 511 is connected to the material outlet 121, the drying outlet 512 is connected to the purification inlet, the discharge outlet 513 is connected to the pyrolysis carbonization inlet 2111, and the drying inlet 514 is connected to the heating outlet 2123.

[0065] This configuration of the drying furnace 51 ensures that the material is thoroughly dried before entering the pyrolysis and carbonization stage, reducing its moisture content. High moisture content in the material consumes a significant amount of heat energy to evaporate moisture during pyrolysis, leading to decreased pyrolysis efficiency. Pre-drying significantly improves heat utilization efficiency, thereby increasing the speed and efficiency of pyrolysis and carbonization. The drying furnace 51 is tilted, with the feed inlet 511 higher than the discharge outlet 513. Utilizing gravity, the material naturally moves downwards within the drying furnace 51, reducing the need for additional power and simplifying the operation. Simultaneously, the pyrolysis gas generated during biochar pyrolysis and carbonization further dries the material in the drying furnace 51, further improving energy utilization efficiency and reducing energy consumption.

[0066] Specifically, whether or not the drying assembly 50 is installed depends on the moisture content of the material, and either direct drying or indirect drying can be used. In this application, direct drying is used, which improves drying efficiency. Optionally, the drying temperature of the drying oven 51 is 105-150°C, and the moisture content of the discharged material is about 10%.

[0067] In this process, the drying temperature is maintained at around 110℃, and the material to be dried moves in opposite directions to the hot flue gas.

[0068] like Figures 6 to 8 As shown, the pyrolysis carbonization system also includes a conveying structure 60. The conveying structure 60 has a conveying chamber 61, with a conveying inlet 611 and a conveying outlet 612 arranged opposite to each other. The conveying inlet 611 is connected to the discharge port 513, and the conveying outlet 612 is connected to the pyrolysis carbonization inlet 2111. A spiral structure 62 is installed inside the conveying chamber 61, which drives the material from the conveying inlet 611 to the conveying outlet 612. This arrangement ensures continuous material transport from the conveying inlet 611 to the conveying outlet 612, preventing blockages or interruptions during transport. Simultaneously, the continuous rotation of the spiral promotes uniform material distribution within the conveying chamber 61, which is crucial for the subsequent pyrolysis carbonization process, ensuring uniform heating and consistent pyrolysis results.

[0069] During operation, the spiral structure 62 is filled with material to ensure an oxygen-deficient working condition within the pyrolysis and carbonization system.

[0070] To better understand this application, the pyrolysis carbonization system is applied to the following actual production conditions:

[0071] Example 1: A cotton stalk processing center uses a rotary kiln pyrolysis process with the pyrolysis carbonization system mentioned in Example 1. The material particle size is ≤20mm, the temperature of the pyrolysis carbonization chamber is controlled at 700 degrees Celsius, and the pyrolysis time is maintained at approximately 60 minutes. The pyrolysis gas is used as fuel in burner 31. After debugging, the system operates well, with tar production <2%, and virtually no tar production under good operating conditions, reducing equipment corrosion and coking.

[0072] Example 2: A certain agricultural and forestry biomass processing center uses a rotary kiln process and the pyrolysis carbonization system mentioned in Example 2. The material includes garden waste, mainly fallen leaves and pruned branches. The material drying temperature is 110℃, the drying time is about 30 minutes, and the moisture content of the dried material is <10%. The temperature of the pyrolysis carbonization chamber is controlled at 750℃, the pyrolysis time is 50 minutes, and the pyrolysis gas is used as fuel in burner 31. After debugging, it runs well, and the tar yield is <2%.

[0073] Alternatively, in Example 2, the pusher 12 can be replaced with a screw feeder.

[0074] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0075] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0076] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0077] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0078] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0079] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A pyrolytic carbonization system, characterized by, The pyrolysis carbonization system comprises: a feeding assembly (10) having a material inlet (111) and a material outlet (121); a pyrolysis carbonization assembly (20) comprising a pyrolysis carbonization furnace (21) having a pyrolysis carbonization cavity and a heating cavity (2121) arranged independently, one end of the pyrolysis carbonization cavity being provided with a pyrolysis carbonization inlet (2111), the other end of the pyrolysis carbonization cavity being provided with a pyrolysis carbonization outlet (2112) and a flue gas outlet (2113), the pyrolysis carbonization cavity being arranged obliquely, the pyrolysis carbonization inlet (2111) being arranged higher than the pyrolysis carbonization outlet (2112), the pyrolysis carbonization inlet (2111) being communicated with the material outlet (121), the heating cavity (2121) being provided with a heating inlet (2122) and a heating outlet (2123) arranged oppositely, fluid in the heating cavity (2121) being used for heating the material in the pyrolysis carbonization cavity; a heat supply assembly (30) comprising a burner (31) having a gas inlet and a gas outlet, the gas inlet being communicated with the flue gas outlet (2113), the gas outlet being communicated with the heating inlet (2122); a purification assembly (40) comprising a dry deacidification tower (41), a dust remover (42) and a wet deacidification tower (43), the dry deacidification tower (41) having a purification inlet communicated with the heating outlet (2123), the dry deacidification tower (41) being used for removing acid gas in flue gas, the inlet of the dust remover (42) being communicated with the outlet of the dry deacidification tower (41), the dust remover (42) being used for removing dust in flue gas, the inlet of the wet deacidification tower (43) being communicated with the outlet of the dust remover (42), the wet deacidification tower (43) being used for removing acid gas in flue gas, the wet deacidification tower (43) being used for discharging purified gas.

2. The pyrolytic carbonization system of claim 1, wherein, The pyrolysis carbonization system further comprises: a drying assembly (50) comprising a drying furnace (51), one end of the drying furnace (51) being provided with a feeding port (511) and a drying outlet (512) communicated with each other, the other end of the drying furnace (51) being provided with a discharging port (513) and a drying inlet (514) communicated with each other, the drying furnace (51) being arranged obliquely, the feeding port (511) being arranged higher than the discharging port (513), the feeding port (511) being communicated with the material outlet (121), the drying outlet (512) being communicated with the purification inlet, the discharging port (513) being communicated with the pyrolysis carbonization inlet (2111), the drying inlet (514) being communicated with the heating outlet (2123).

3. The pyrolytic carbonization system of claim 2, wherein, The pyrolysis carbonization system further comprises: A conveying structure (60) has a conveying cavity (61) with a conveying inlet (611) and a conveying outlet (612) oppositely arranged, the conveying inlet (611) communicates with the discharge port (513), and the conveying outlet (612) communicates with the pyrolysis carbonization inlet (2111), and a spiral structure (62) is arranged in the conveying cavity (61) to drive the material to move from the conveying inlet (611) to the conveying outlet (612).

4. The pyrolytic carbonization system of claim 1, wherein, The pyrolysis carbonization furnace (21) comprises: A pyrolysis carbonization cylinder (211) has the pyrolysis carbonization cavity, the pyrolysis carbonization inlet (2111), the pyrolysis carbonization outlet (2112) and the flue gas outlet (2113); A heating cylinder (212) is sleeved outside the pyrolysis carbonization cylinder (211), and has the heating cavity (2121) between the pyrolysis carbonization cylinder (211) and the heating cylinder (212), the heating inlet (2122) and the heating outlet (2123) are arranged on the heating cylinder (212), the heating inlet (2122) and the heating outlet (2123) are arranged at two ends of the heating cylinder (212) along the extension direction of the pyrolysis carbonization cavity, and the heating inlet (2122) is arranged close to the pyrolysis carbonization outlet (2112) relative to the heating outlet (2123).

5. The pyrolytic charring system of claim 1, wherein, The pyrolysis carbonization system further comprises: A cooling assembly (70) comprises a cooler (71) having a cooling inlet and a cooling outlet (711) oppositely arranged, the cooling inlet communicates with the pyrolysis carbonization outlet (2112), the cooler (71) is used for cooling the biochar discharged from the pyrolysis carbonization outlet (2112), and the cooling outlet (711) is used for discharging biochar.

6. The pyrolytic charring system of claim 5, wherein, The cooler (71) comprises: A body has a cooling cavity with the cooling inlet and the cooling outlet (711), and a temperature detection element is arranged in the cooling cavity; An air injection pipeline communicates with the cooling cavity and is used for discharging inert gas into the cooling cavity; A cooling pipeline is used for cooling the cooling cavity.

7. The pyrolytic charring system of claim 1, wherein, The pyrolysis carbonization system further comprises: A control valve is arranged on the flue gas outlet (2113); A first pipeline (81) has one end communicating with the control valve and the other end communicating with the gas inlet; A second pipeline (82) has one end communicating with the control valve, and the control valve is used for controlling the communication between the flue gas outlet (2113) and the first pipeline (81) and the second pipeline (82). A collecting assembly (90) is arranged, which has a water washing tower (91) and a storage tank (92), an inlet of the water washing tower (91) is communicated with the other end of the second pipeline (82), and an outlet of the water washing tower (91) is communicated with an inlet of the storage tank (92).

8. The pyrolytic charring system of claim 7, wherein, The collecting assembly (90) further comprises: A heat exchange structure (93), an inlet of the heat exchange structure (93) is communicated with the outlet of the water washing tower (91), the heat exchange structure (93) is used for cooling the gas, and an outlet of the heat exchange structure (93) is communicated with the inlet of the storage tank (92); A pressure stabilizing structure (94), an inlet of the pressure stabilizing structure (94) is communicated with the outlet of the storage tank (92), and the pressure stabilizing structure (94) is used for controlling the pressure of the gas.

9. The pyrolytic charring system of claim 1, wherein, The feeding assembly (10) comprises: A feeding hopper (11), which has the material inlet (111); A pusher (12), which has a shell and a push rod, the shell has a push cavity, one end of the push cavity has the material outlet (121), an inlet of the push cavity is communicated with an outlet of the feeding hopper (11), and the push rod is movably arranged at the other end of the push cavity and is used for pushing the material in the push cavity to move to the material outlet (121).

10. The pyrolytic charring system of claim 9, wherein, The material inlet (111) is located above the outlet of the feeding hopper (11), the cross-sectional area of the feeding hopper (11) gradually decreases in the direction from the material inlet (111) to the outlet of the feeding hopper (11); and the pusher (12) is arranged obliquely, and the inlet of the push cavity is arranged higher than the material outlet (121).

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