Biomass gas-solid product collaborative conveying device suitable for rotary kiln

Abstract

The invention discloses a biomass gas-solid product collaborative conveying device suitable for a rotary kiln, and belongs to the technical field of rotary kilns, in particular to a rotary kiln, a biomass gasifier, a fuel regulator, a mixed fuel pipeline, a solid bin and a fuel bin; the mixed fuel pipeline comprises a solid fuel pipeline, a gas fuel pipeline and a conveying pipeline; the solid fuel pipeline and the conveying pipeline each comprise an inner pipe and an outer pipe, the inner pipe is used for solid fuel to pass through, and an annular area formed between the outer pipe and the inner pipe is communicated with the gas fuel pipeline and used for gas fuel to pass through. Through the design of the inner pipe and the outer pipe, the outlets of the gas fuel pipeline and the solid fuel pipeline are converged together, so that when the rotary kiln is connected with the rotary kiln, only one inlet needs to be formed in the rotary kiln, two inlets do not need to be formed for introducing gas fuel and solid fuel respectively, the number of the inlets is reduced, machining of the inlet of the rotary kiln 1 can be reduced, and the cost is reduced. And meanwhile, heat dissipation of the rotary kiln can be avoided.

Description

Technical Field

[0001] This application relates to the field of rotary kiln technology, and more specifically, to a biomass gas-solid product co-transportation device suitable for rotary kilns. Background Technology

[0002] As a basic building materials industry of the national economy, the cement industry is characterized by high energy consumption and high carbon dioxide emissions during the cement production process. If biomass materials can be used for auxiliary combustion, some energy consumption can be reduced.

[0003] Biomass is a carbon-containing renewable resource that fixes carbon dioxide through photosynthesis during its growth. Examples include straw. Straw and similar materials can be used as fuel to assist in rotary kiln combustion. However, when biomass is directly crushed and injected into the rotary kiln as a substitute fuel, its high moisture content leads to a low calorific value and insufficient flame temperature, requiring additional energy for drying and resulting in hidden carbon dioxide emissions. After biomass gasification, the solid and gaseous products can be separately fed into the rotary kiln for auxiliary combustion. When feeding the solid and gaseous products into the rotary kiln through solid and gas delivery pipes, two inlets need to be opened on the kiln's end cover, connecting to the solid and gas delivery pipes respectively. Opening two inlets requires a larger sealed connection, potentially leading to sealing issues. Summary of the Invention

[0004] The main objective of this application is to provide a biomass gas-solid product co-transportation device suitable for rotary kilns, in order to solve the problem in related technologies where, when solid and gaseous products are introduced into a rotary kiln through solid and gaseous conveying pipes, two inlets need to be opened on the end cover of the rotary kiln to connect to the solid and gaseous conveying pipes respectively. However, opening two inlets would enlarge the part that needs to be sealed, which may lead to problems with incomplete sealing.

[0005] To achieve the above objectives, this application provides a biomass gas-solid product co-transportation device suitable for rotary kilns, comprising: Rotary kiln, biomass gasifier, fuel regulator, mixed fuel pipeline, solid silo, fuel silo; The material in the biomass gasifier is gasified to produce solid and gaseous products. The gas outlet of the biomass gasifier is connected to the fuel regulator, and the solid outlet of the biomass gasifier is connected to the solid silo. The solid products in the solid silo are mixed with the fuel in the fuel silo and then enter the fuel regulator. The fuel regulator can adjust the proportion of solid products, fuel, and gaseous products entering the rotary kiln. The mixed fuel pipeline is connected between the fuel regulator and the rotary kiln. The mixed fuel pipeline includes a solid fuel pipeline, a gaseous fuel pipeline, and a conveying pipeline. The gaseous fuel pipeline is connected as a branch to the solid fuel pipeline. The outlet of the solid fuel pipeline is connected to the inlet of the conveying pipeline, and the outlet of the conveying pipeline is connected to the rotary kiln. Both the solid fuel pipeline and the delivery pipeline include an inner pipe and an outer pipe. The inner pipe is used for the passage of solid fuel, and the annular area between the inner and outer pipes communicates with the gaseous fuel pipeline for the passage of gaseous fuel.

[0006] Optionally, the outer tube of the solid fuel pipeline is provided with guide vanes, which are located on the inner wall of the outer tube of the solid fuel pipeline. The guide vanes are inclined towards the conveying pipeline. After the gaseous fuel enters the annular area, it is guided by the guide vanes to flow into the conveying pipeline.

[0007] Optionally, the guide vanes are spirally arranged on the inner wall of the conveying pipe, with the spiral direction facing the rotary kiln.

[0008] Optionally, the guide vanes are multiple, and the multiple guide vanes are distributed on the inner wall of the solid fuel pipeline.

[0009] Optionally, in the airflow direction of the solid fuel pipeline, the length of the guide vane located downstream of the airflow is longer than the length of the guide vane located upstream of the airflow.

[0010] Optionally, the inner diameter of the inner pipe of the conveying pipeline gradually decreases from the inlet towards the direction away from the solid fuel pipeline, and the inner diameter of the outer pipe of the conveying pipeline gradually decreases from the inlet towards the direction away from the solid fuel pipeline.

[0011] Optionally, the outlet of the conveying pipe is provided with a funnel-shaped opening, which is located inside the rotary kiln.

[0012] Optionally, the gaseous fuel pipeline is inclined to the solid fuel pipeline, and the inclination direction is consistent with the gas flow direction.

[0013] The biomass gas-solid product co-transportation device for rotary kilns provided in this application has an inner pipe of a solid fuel pipeline connected to the inner pipe of a transport pipeline, and an outer pipe of the solid fuel pipeline connected to the outer pipe of the transport pipeline. The inner pipe is used for solid fuel passage, and the annular area formed between the inner and outer pipes is connected to the gaseous fuel pipeline for gaseous fuel passage. Through the design of the inner and outer pipes, the outlets of the gaseous fuel pipeline and the solid fuel pipeline are converged, so that when connecting to the rotary kiln, only one inlet needs to be opened on the rotary kiln, eliminating the need for two separate inlets for gaseous and solid fuel. Reducing the number of inlets reduces processing at the rotary kiln inlet and also avoids heat dissipation from the rotary kiln. Attached Figure Description

[0014] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application. In the drawings: Figure 1 This is a system schematic diagram of a biomass gas-solid product co-transport device suitable for rotary kilns according to an embodiment of this application; Figure 2 This is a schematic diagram of the structure of the mixed fuel pipeline according to the embodiments of this application; Figure 3 This is a side view of a solid fuel pipeline according to an embodiment of this application; Figure 4 This is a schematic diagram of the structure of the guide vanes in the solid fuel pipeline according to the embodiments of this application; Figure 5 This is a structural schematic diagram of the biomass gasification furnace according to the embodiments of this application.

[0015] The components are as follows: 1. Rotary kiln; 2. Decomposition furnace; 3. Air inlet; 4. Biomass bin; 5. Feed inlet; 6. Biomass gasifier; 7. Air outlet; 8. Mixed fuel pipeline; 81. Solid fuel pipeline; 82. Gaseous fuel pipeline; 83. Conveying pipeline; 84. Guide vane; 9. Discharge outlet; 10. Solid material bin; 11. Fuel bin; 12. Mixing bin; 13. Blower; 14. Fuel regulator; 15. Upper grid plate; 16. Lower grid plate; 17. Air outlet pipeline; 18. Discharge port; 20. Guide plate. Detailed Implementation

[0016] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0017] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein.

[0018] In this application, the terms "upper," "lower," "inner," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily used to better describe this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0019] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0020] Furthermore, the terms "set up," "equipped with," "connected," and "fixed" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0021] In addition, the term "multiple" should mean two or more.

[0022] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0023] This embodiment provides a specific implementation of a biomass gas-solid product co-transportation device suitable for rotary kilns, such as... Figure 1As shown, the system includes a rotary kiln 1, a biomass gasifier 6, a biomass silo 4, a mixed fuel pipeline 8, a fuel regulator 14, a fuel silo 11, and a solids silo 10. The biomass silo 4 is connected to the biomass gasifier 6 and provides materials to the biomass gasifier 6. The biomass gasifier 6 includes a gas outlet and a solids outlet. After gasification, the materials in the biomass gasifier 6 produce solid products and gaseous products. The gasification products are transported to the fuel regulator through the gas outlet, and the solid products are transported to the solids silo 10 through the solids outlet. The solids silo 10 is connected to the fuel regulator 14. The solid products and gaseous products enter the rotary kiln 1 through the fuel regulator 14. The fuel in the fuel silo 11 enters the rotary kiln 1 through the fuel regulator 14. The fuel regulator 14 can adjust the proportion of solid products, gaseous products, and fuel entering the rotary kiln 1.

[0024] Specifically, the mixed fuel pipeline 8 is located between the fuel regulator 14 and the rotary kiln 1, such as... Figure 2 As shown, the mixed fuel pipeline 8 includes a solid fuel pipeline 81, a gaseous fuel pipeline 82, and a conveying pipeline 83. The gaseous fuel pipeline 82 is connected as a branch to the solid fuel pipeline 81, and the outlet of the solid fuel pipeline 81 is connected to the inlet of the conveying pipeline 83. Both the solid fuel pipeline 81 and the conveying pipeline 83 include an inner pipe and an outer pipe. The inner pipe of the solid fuel pipeline 81 is connected to the inner pipe of the conveying pipeline 83, and the outer pipe of the solid fuel pipeline 81 is connected to the outer pipe of the conveying pipeline 83. The inner pipe is used for solid fuel passage, and the annular area formed between the outer and inner pipes is connected to the gaseous fuel pipeline 82 for gaseous fuel passage. Through the design of the inner and outer pipes, the outlets of the gaseous fuel pipeline 82 and the solid fuel pipeline 81 are converged, so that when connected to the rotary kiln 1, only one inlet needs to be opened on the rotary kiln 1, eliminating the need for two separate inlets for gaseous and solid fuel. Reducing the number of inlets reduces processing at the inlet of the rotary kiln 1 and also prevents heat dissipation from the rotary kiln 1.

[0025] In this embodiment, as Figure 3 and Figure 4 As shown, the solid fuel pipeline 81 is provided with guide vanes 84, and the inclined direction of the guide vanes 84 is towards the conveying pipeline 83. The guide vanes 84 are distributed on the inner wall of the outer tube of the solid fuel pipeline 81. After the gaseous fuel enters the annular area, it can be guided by the guide vanes 84 to flow towards the conveying pipeline 83, so as to avoid the gaseous fuel accumulating in the annular area.

[0026] Furthermore, such as Figure 4 As shown, the guide vane 84 is spirally arranged on the inner wall of the outer tube of the solid fuel pipeline 81, with the spiral direction facing the rotary kiln, so that the gaseous fuel can follow the guide plate 20 to the rotary kiln after entering the annular area.

[0027] In some other embodiments, there are multiple guide vanes 84, which are distributed on the inner wall of the outer tube of the solid fuel pipeline 81. In the direction of airflow in the solid fuel pipeline 81, the length of the guide vane 84 located downstream of the airflow is longer than the length of the guide vane 84 located upstream of the airflow. This design ensures that as the gaseous fuel flows in the pipe, the guide vane 84 maintains its guiding effect on the gaseous fuel as its length increases. At the same time, as the length of the guide vane 84 increases, a flow space with a gradually decreasing inner diameter is formed inside it, which can accelerate the gaseous fuel during the flow process and make the gaseous fuel flow quickly into the delivery pipeline.

[0028] In this embodiment, the inner diameter of the inner pipe of the conveying pipe 83 gradually decreases from the inlet towards the direction away from the solid fuel pipe 81, and the inner diameter of the outer pipe of the conveying pipe 83 gradually decreases from the inlet towards the direction away from the solid fuel pipe 81. This design enables the gaseous fuel and solid fuel to be accelerated during the conveying process to the rotary kiln 1, so that the gaseous fuel and solid fuel can flow quickly into the rotary kiln 1.

[0029] Furthermore, the outlet of the conveying pipe 83 is configured as a funnel-shaped opening, and the funnel-shaped opening is located inside the rotary kiln 1. After the gaseous fuel and solid fuel are accelerated by the conveying pipe 83, the inner diameter of the conveying pipe 83 suddenly increases at the outlet position, which can generate turbulence in the gaseous fuel and solid fuel. After passing through the outlet into the rotary kiln 1, they are fully mixed, thereby improving the combustion efficiency.

[0030] In this embodiment, the gaseous fuel pipeline 82 is inclined to the solid fuel pipeline 81, and the inclination direction is consistent with the gas flow direction, so that the initial flow direction of the gaseous fuel is consistent with the flow direction towards the rotary kiln 1. With the help of the initial flow velocity of the gaseous fuel and the guidance of the guide vanes 84, the gaseous fuel can flow quickly into the conveying pipeline 83, thereby improving the conveying efficiency of the gaseous fuel.

[0031] In this embodiment, it may further include a decomposition furnace 2, with the material outlet of the rotary kiln 1 connected to the decomposition furnace 2, and the gas outlet of the decomposition furnace 2 connected to the biomass gasification furnace 6. Specifically, the biomass gasifier 6 is provided with an air inlet 3, an air outlet 7, a feed inlet 5, and a discharge outlet 9. The air inlet 3 is connected to the air outlet of the decomposition furnace 2, the air outlet 7 is connected to the fuel regulator 14, the feed inlet 5 is connected to the biomass bin 4, and the discharge outlet 9 is connected to the solid material bin 10.

[0032] Furthermore, it also includes a mixing chamber 12, in which the fuel provided by the fuel chamber 11 and the solid products produced by the biomass gasification furnace 6 are both transported to the mixing chamber 12 for mixing to form solid fuel, and the gaseous products form gaseous fuel. Both solid fuel and gaseous fuel are fed into the fuel regulator 14, which can adjust the ratio of gaseous fuel to solid fuel.

[0033] Specifically, the solid products and fuels need to be weighed before entering the mixing chamber 12 in order to control the quality of the solid products and fuels entering the mixing chamber 12.

[0034] In this embodiment, a blower 13 is also included, which blows towards the fuel regulator 14 to inject the mixed solid fuel and gaseous fuel into the rotary kiln 1.

[0035] In this embodiment, the gaseous products produced by the biomass gasifier 6 need to pass through a cyclone separator for coarse dust removal; then through a bag filter for fine dust removal; subsequently, they undergo catalytic cracking to remove tar; after cooling in a water washing tower, they are desulfurized in a dry desulfurization tower; finally, after dehydration in an adsorption drying tower, they are injected into the rotary kiln 1 via the fuel regulator 14. Specifically, the cyclone separator, bag filter, catalytic cracking tower, water washing tower, dry desulfurization tower, and adsorption drying tower are sequentially arranged between the biomass gasifier 6 and the fuel regulator 14. The gaseous products after tar removal in the catalytic cracking tower are fed into the drying device 19 to dry the solid products; that is, the outlet of the catalytic cracking tower is connected to the inlet of the drying furnace, and the outlet of the drying furnace is connected to the inlet of the water washing tower. The solid and gaseous products can be utilized during the processing to reduce additional energy consumption.

[0036] In this embodiment, a guide plate 20 is provided at the lower part of the biomass gasifier 6. The inner diameter of the guide plate 20 gradually decreases from bottom to top. The flue gas generated by the decomposition furnace 2 is injected from the bottom of the biomass gasifier 6. As the flue gas flows upward, the inner diameter of the guide plate 20 gradually decreases, which can accelerate the upward flow of the flue gas. When the flue gas reaches the top of the guide plate 20, the inner diameter of the biomass gasifier 6 increases again, so that the flue gas can form turbulence when leaving the guide plate 20, thereby better mixing with the biomass material.

[0037] In this embodiment, as Figure 5As shown, the biomass gasifier 6 has two layers of grid plates: an upper grid plate 15 and a lower grid plate 16. Both grid plates are located above the guide plate 20, and a gasification space is formed between the upper grid plate 15 and the lower grid plate 16 for biomass gasification. The grid plates can buffer the biomass material falling from above, allowing the biomass material to remain for a longer time to complete the gasification. The upper grid plate 15 can hold more biomass material. As the biomass material gradually enters the gasification space, the upward flue gas is accelerated and turbulent, allowing it to mix thoroughly with the biomass material in the gasification space, which can improve the efficiency of biomass gasification. At the same time, the arrangement of the two grid plates can also make the biomass gasification more thorough.

[0038] In this embodiment, the gas outlet of the decomposition furnace 2 is connected to the air inlet of the biomass gasification furnace 6. The air inlet of the biomass gasification furnace 6 is located at the bottom of the biomass gasification furnace 6, and multiple air outlet pipes 17 are provided at the air inlet of the biomass gasification furnace 6. The multiple air outlet pipes 17 can evenly spray the flue gas produced by the decomposition furnace 2 into the biomass gasification furnace 6.

[0039] In this embodiment, the biomass bin 4 is connected to the feed inlet 5 of the biomass gasifier 6. The feed inlet 5 is located at the top of the biomass gasifier 6, and a funnel-shaped material dispersing port 18 is provided at the feed inlet 5 so that the biomass material can be evenly dispersed in the biomass gasifier 6 when it falls, so as to more fully gasify the biomass material.

[0040] In this embodiment, the solid product produced by the biomass gasifier 6 is solid carbon, and the gaseous product is biomass gas. The fuel mentioned in this embodiment is pulverized coal.

[0041] In this embodiment, gas and solids can be used as fuels alone, or they can be combined, such as gas-solid (70%-100%: 0%-30%), gas-coal (0%-50%: 50%-100%), or solids-coal (0%-30%: 70%-100%). Alternatively, all three can be combined simultaneously (gas:solids:coal—35%-50%:0%-15%:50%) for combustion. Furthermore, the entire biomass gasification unit is independent of the original rotary kiln unit. When there are seasonal limitations on biomass, it can revert to the original operation mode (burning only coal).

[0042] The following specific examples will be used to illustrate this: A company needs to consume approximately 120-130 kg of coal to produce one ton of cement. Bituminous coal has a calorific value higher than 25 MJ / kg. To ensure the ratio of solid to gaseous products, experimental data analysis was conducted, and solid and gaseous products were injected into a rotary kiln as coal substitutes, replacing about 50% of the coal. During biomass gasification, the yield of solid products is less than 30%, with a calorific value higher than 26 MJ / kg, while the yield of gaseous products is higher than 70%. Using the following formula, the calorific value of the gaseous products is calculated to be higher than 11 MJ / kg.

[0043] , To calculate the overall calorific value, Let be the volume fraction of the i-th combustible component. The higher heating value of the i-th combustible component is... Let be the standard density of the i-th type of combustible gas.

[0044] , This refers to the reduction in carbon dioxide emissions. The weight of the coal that is replaced. This refers to the carbon content of bituminous coal. For combustion efficiency, molar ratio, This represents the percentage of gas volume. For gas density, To replace the weight of biomass gas components in bituminous coal.

[0045] Case 1 The specific implementation steps are as follows, with 600℃ as the reaction condition for the gasification process: The bituminous coal used in the rotary kiln has a calorific value of 25 MJ / kg, a carbon content of 75%, and a combustion efficiency of 95%. Producing 1 ton of cement requires 130 kg of coal. The carbon yield of the biomass by-products is 28.49%, with a calorific value of 30.30 MJ / kg. The biomass gas yield is 71.51%, with a total calorific value of 11.71 MJ / kg (of which CH4, CO, and H2 contents are 5%, 30%, and 5%, respectively, with fixed calorific values ​​of 38.5 MJ / m³, 12.6 MJ / m³, and 10.8 MJ / m³). Therefore, the mass ratio of carbon from biomass by-products, biomass gas, and pulverized coal required to produce 1 ton of cement is 22.05:55.33:77.38 kg, replacing 22.62 kg of bituminous coal. The carbon dioxide emission reduction from replacing bituminous coal, calculated using formula (2), is 59.10 kg of carbon dioxide. The carbon dioxide consumption (emission reduction) during the operation of the biomass gasification furnace is 11.11 kg of carbon dioxide. Therefore, the total carbon dioxide emission reduction during the production process is 70.21 kg of carbon dioxide.

[0046] Case 2 The specific implementation steps are as follows, with 700℃ as the reaction condition for the gasification process: The bituminous coal used in the rotary kiln has a calorific value of 26 MJ / kg, a carbon content of 80%, and a combustion efficiency of 94%. Producing 1 ton of cement requires 125 kg of coal. The carbon yield of the biomass byproducts is 25.06%, with a calorific value of 29.69 MJ / kg. The biomass gas yield is 74.94%, with a total calorific value of 20.33 MJ / kg (containing 8% CH4, 40% CO, and 10% H2). At this point, the mass ratio of carbon from the biomass byproducts, biomass gas, and pulverized coal required to produce 1 ton of cement is 15.75:47.13:62.89 kg, replacing 37.11 kg of bituminous coal. Using the second formula, the carbon dioxide emission reduction from replacing bituminous coal is calculated to be 102.33 kg of carbon dioxide. The carbon dioxide consumption (emission reduction) during the operation of the biomass gasification furnace is 7.19 kg of carbon dioxide. Therefore, the total carbon dioxide emission reduction during the production process is 109.52 kg of carbon dioxide.

[0047] Case 3 The specific implementation steps are as follows, with 800℃ as the reaction condition for the gasification process: The bituminous coal used in the rotary kiln has a calorific value of 27 MJ / kg, a carbon content of 85%, and a combustion efficiency of 93%. Producing 1 ton of cement requires 120 kg of coal. The carbon yield of the biomass byproducts is 20.33%, with a calorific value of 28.09 MJ / kg. The biomass gas yield is 79.67%, with a total calorific value of 28.42 MJ / kg (of which CH4, CO, and H2 contents are 10%, 50%, and 15%, respectively). At this point, the mass ratio of carbon from the biomass byproducts, biomass gas, and pulverized coal required to produce 1 ton of cement is 10.92:42.76:53.68 kg, replacing 46.32 kg of bituminous coal. Using the second formula, the carbon dioxide emission reduction from replacing bituminous coal is calculated to be 134.27 kg of carbon dioxide. The carbon dioxide consumption (emission reduction) during the operation of the biomass gasification furnace is 4.53 kg of carbon dioxide, resulting in a total carbon dioxide emission reduction of 138.8 kg of carbon dioxide during the production process.

[0048] The steps for preparing raw materials to determine the yield and calorific value of biomass gasification solid products in Cases 1-3 are as follows: In Case 1, the carbon yield of biomass byproducts was 28.49%, and the calorific value was 30.30 MJ / kg.

[0049] In Case 2, the carbon yield of biomass byproducts was 25.06%, and the calorific value was 29.69 MJ / kg.

[0050] In Case 3, the carbon yield of biomass byproducts was 20.33%, and the calorific value was 28.09 MJ / kg.

[0051] Preparation steps: Weigh approximately 26g of the original sample using a gray dish, place the weighed sample into a tube furnace, close the opening, set the aeration rate to 400-500ml / min, and ventilate for about 10 minutes to completely purge the air from the furnace. Then, raise the temperature at a rate of 10℃ / min. After the temperature reaches the set temperature, continue to hold the temperature for 60 minutes. After the reaction is complete, remove the solid byproduct, calculate the carbon yield, and perform industrial and elemental analysis on the carbon material to calculate the calorific value.

[0052] The data in Cases 1-3 were obtained from previous gasification experiments, and the calorific value was calculated using a formula.

[0053] HHV=0.349C+1.1783H+0.1005S-0.1034O-0.0015N-0.0211A Energy yield = (calorific value of original sample / calorific value of solid by-product) * carbon yield of solid by-product * 100%.

[0054] Table 1. Industrial and elemental analyses of different samples , Table 1 shows the composition of each component and the higher heating value (HHV) of the original sample in industrial analysis and elemental analysis at different temperatures. For example, in industrial analysis, the composition of volatile matter (V), ash (A) and fixed carbon (FC) is shown, and in elemental analysis, the composition of carbon (C), hydrogen (H), oxygen (O), nitrogen (N) and sulfur (S) is shown.

[0055] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A biomass gas-solid product co-transportation device suitable for rotary kilns, characterized in that, include: Rotary kiln, biomass gasifier, fuel regulator, mixed fuel pipeline, solid silo, fuel silo; The material in the biomass gasifier is gasified to produce solid and gaseous products. The gas outlet of the biomass gasifier is connected to the fuel regulator, and the solid outlet of the biomass gasifier is connected to the solid silo. The solid products in the solid silo are mixed with the fuel in the fuel silo and then enter the fuel regulator. The fuel regulator can adjust the proportion of solid products, fuel, and gaseous products entering the rotary kiln. The mixed fuel pipeline is connected between the fuel regulator and the rotary kiln. The mixed fuel pipeline includes a solid fuel pipeline, a gaseous fuel pipeline, and a conveying pipeline. The gaseous fuel pipeline is connected as a branch to the solid fuel pipeline. The outlet of the solid fuel pipeline is connected to the inlet of the conveying pipeline, and the outlet of the conveying pipeline is connected to the rotary kiln. Both the solid fuel pipeline and the delivery pipeline include an inner pipe and an outer pipe. The inner pipe is used for the passage of solid fuel, and the annular area between the inner and outer pipes communicates with the gaseous fuel pipeline for the passage of gaseous fuel.

2. The biomass gas-solid product co-conveying device suitable for rotary kilns according to claim 1, characterized in that, The solid fuel pipeline has guide vanes inside its outer tube. The guide vanes are located on the inner wall of the outer tube of the solid fuel pipeline and are inclined towards the delivery pipeline. After the gaseous fuel enters the annular area, it is guided by the guide vanes to flow into the delivery pipeline.

3. The biomass gas-solid product co-conveying device suitable for rotary kilns according to claim 2, characterized in that, The guide vanes are spirally arranged on the inner wall of the conveying pipe, with the spiral direction facing the rotary kiln.

4. The biomass gas-solid product co-conveying device suitable for rotary kilns according to claim 2, characterized in that, The guide vanes are multiple, and the multiple guide vanes are distributed on the inner wall of the solid fuel pipeline.

5. The biomass gas-solid product co-conveying device suitable for rotary kilns according to claim 4, characterized in that, In the direction of airflow in the solid fuel pipeline, the guide vane located downstream of the airflow is longer than the guide vane located upstream of the airflow.

6. The biomass gas-solid product co-conveying device suitable for rotary kilns according to claim 1, characterized in that, The inner diameter of the inner pipe of the conveying pipeline gradually decreases from the inlet towards the direction away from the solid fuel pipeline, and the inner diameter of the outer pipe of the conveying pipeline gradually decreases from the inlet towards the direction away from the solid fuel pipeline.

7. The biomass gas-solid product co-conveying device suitable for rotary kilns according to claim 6, characterized in that, The outlet of the conveying pipe is provided with a funnel-shaped opening, which is located inside the rotary kiln.

8. The biomass gas-solid product co-conveying device suitable for rotary kilns according to claim 1, characterized in that, The gaseous fuel pipeline is inclined to the solid fuel pipeline, and the inclination direction is consistent with the gas flow direction.

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