Combined system for interactive utilization of products of rotary kiln and biomass gasification device

Abstract

The invention discloses a combined system for interactive utilization of products of a rotary kiln and a biomass gasification device, and belongs to the technical field of rotary kilns. The combined system specifically comprises the rotary kiln, a biomass gasification furnace, a biomass bin, a decomposing furnace, a fuel regulator, a fuel bin and a solid bin; according to the combined system provided by the invention, the gas outlet of the decomposing furnace is communicated to the biomass gasification furnace, so that high-temperature flue gas generated in the decomposing furnace enters the biomass gasification furnace to gasify the biomass, and solid products and gas products generated in the gasification process of the biomass are respectively processed and enter the rotary kiln for auxiliary combustion; the use of fuel can be reduced, the emission of carbon dioxide can be reduced, and the emission reduction of carbon dioxide can be realized; meanwhile, the solid product, the gas product and the fuel can be synergistically utilized in a multi-phase manner, for example, the fuel, the solid product and the gas product can be independently introduced or simultaneously introduced, and adjustment can be made according to seasonal changes or the gas-solid ratio and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rotary kiln, in particular to a combined system for product interaction and utilization of rotary kiln and biomass gasification device. BACKGROUND

[0002] As a basic building material industry of national economy, the cement industry has the characteristics of high energy consumption and high carbon dioxide emission in the production process. If biomass materials are used for auxiliary combustion, part of the energy consumption can be reduced.

[0003] Biomass is a carbon-containing renewable resource that fixes carbon dioxide through photosynthesis during growth. For example, straw and other materials can be used as fuel to assist rotary kiln calcination. However, when biomass is directly crushed and sprayed into the rotary kiln as a substitute fuel, the low combustion value caused by high moisture content will result in insufficient flame temperature, which requires additional energy consumption for drying. Instead, it will produce hidden carbon dioxide emissions. In addition, when biomass is converted into synthesis gas as auxiliary fuel through biomass gasification technology, solid carbon byproducts are produced. The existing technology usually disposes the solid carbon as solid waste or sells it at a low price. Not only the carbon resources are wasted, but also the solid waste disposal cost and environmental burden are increased. SUMMARY

[0004] The main purpose of the present application is to provide a combined system for product interaction and utilization of rotary kiln and biomass gasification device, to solve the problems that biomass materials cannot be directly sprayed into the rotary kiln for combustion due to insufficient flame temperature, and that solid carbon produced in the biomass gasification process is inconvenient to handle in the related art.

[0005] To achieve the above purpose, the present application provides a combined system for product interaction and utilization of rotary kiln and biomass gasification device, comprising: a rotary kiln, a biomass gasification furnace, a biomass bin, a decomposition furnace, a fuel regulator, a fuel bin, and a solid material bin; The material outlet of the rotary kiln is communicated with the decomposition furnace, the gas outlet of the decomposition furnace is communicated to the biomass gasification furnace, the biomass bin is communicated to the biomass gasification furnace and provides materials for the biomass gasification furnace, the materials in the biomass gasification furnace produce solid products and gas products after biomass gasification, the solid products are transported to the solid material bin, the solid material bin is communicated with the fuel regulator, the solid products and gas products enter the rotary kiln through the fuel regulator, the fuel of the fuel bin enters the rotary kiln through the fuel regulator, and the fuel regulator is used to adjust the proportion of the solid products, gas products and fuel entering the rotary kiln.

[0006] Optionally, the device further comprises a drying device, a crushing device and a grinding device, which are sequentially arranged between the biomass gasification furnace and the solid storage bin, and the solid product is transported to the solid storage bin after drying, crushing and grinding. The gas outlet of the biomass gasification furnace is connected to the gas inlet of the drying device, and the gas outlet of the drying device is connected to the fuel regulator.

[0007] Optionally, the drying device comprises a drying furnace and a conveying belt, the gas inlet of the drying furnace is connected to the biomass gasification furnace, the gas outlet of the drying furnace is connected to the crushing device, the conveying belt is arranged in the drying furnace, the drying furnace is provided with a gas inlet and a gas outlet, the gas inlet is connected to the gas outlet of the biomass gasification furnace, and the gas outlet is connected to the fuel regulator, the gas inlet is located at the downstream position of the conveying belt, and the gas outlet is located at the upstream position of the conveying belt.

[0008] Optionally, the device further comprises a mixing bin, the fuel bin provides fuel to the mixing bin, the solid product in the biomass gasification furnace is transported into the mixing bin to mix with the fuel to form solid fuel, the gas product forms gas fuel, and the outlet of the mixing bin is connected to the fuel regulator.

[0009] Optionally, the device further comprises a blower, which blows towards the fuel regulator to spray the mixed solid fuel and gas fuel into the rotary kiln.

[0010] Optionally, the biomass gasification furnace is provided with a guide plate at the lower part, and the inner diameter of the guide plate gradually decreases from bottom to top.

[0011] Optionally, the biomass gasification furnace is provided with two layers of grid plates, namely an upper grid plate and a lower grid plate, and the two layers of grid plates are located above the guide plate. The upper grid plate and the lower grid plate form a gasification space for biomass gasification of the material.

[0012] Optionally, the gas outlet of the decomposition furnace is connected to the gas inlet of the biomass gasification furnace, and the gas inlet of the biomass gasification furnace is located at the bottom of the biomass gasification furnace. A plurality of gas outlets are arranged at the gas inlet of the biomass gasification furnace, and the plurality of gas outlets are used to uniformly spray the flue gas generated by the decomposition furnace into the biomass gasification furnace.

[0013] Optionally, the biomass bin is connected to the feeding inlet of the biomass gasification furnace, and the feeding inlet is located at the top of the biomass gasification furnace. The biomass gasification furnace is provided with a horn-shaped material distribution opening at the feeding opening, so that the material is uniformly distributed in the biomass gasification furnace.

[0014] Optionally, the fuel conditioner is communicated with the rotary kiln through a mixed fuel pipeline, and the mixed fuel pipeline comprises: a solid fuel pipeline, a gas fuel pipeline connected to the solid fuel pipeline as a branch, and a conveying pipeline communicated with the outlet of the solid fuel pipeline and the inlet of the conveying pipeline; The solid fuel pipeline and the conveying pipeline each comprise an inner tube for solid fuel to pass through and an outer tube, and the annular area between the inner tube and the outer tube is communicated with the gas fuel pipeline for gas fuel to pass through.

[0015] Optionally, the solid fuel pipeline is provided with guide vanes, the guide vanes are inclined towards the conveying pipeline, the guide vanes are distributed on the inner wall of the solid fuel pipeline, and the gas fuel entering the annular area is guided to flow to the conveying pipeline through the guide vanes.

[0016] Optionally, the guide vanes are helically arranged on the inner wall of the conveying pipeline, and the helical direction of the guide vanes is towards the rotary kiln.

[0017] Optionally, the inner diameter of the inner tube of the conveying pipeline gradually decreases from the inlet to the direction away from the solid fuel pipeline, and the inner diameter of the outer tube of the conveying pipeline gradually decreases from the inlet to the direction away from the solid fuel pipeline.

[0018] The combined system of the rotary kiln and the biomass gasification device provided in the application is used for the interaction and utilization of products, the gas outlet of the decomposition furnace is communicated with the biomass gasification furnace, a large amount of high-temperature flue gas generated in the decomposition furnace enters the biomass gasification furnace to gasify the biomass, the solid product and the gas product generated in the gasification process of the biomass are processed and then enter the rotary kiln for auxiliary combustion, the use of fuel (such as coal powder) can be reduced, the emission of carbon dioxide can be reduced, and the emission reduction of carbon dioxide can be realized; meanwhile, the solid product, the gas product and the fuel can be used in a multiphase cooperation manner, for example, the fuel (coal powder), the solid product and the gas product can be independently introduced, or the fuel (coal powder), the solid product and the gas product can be simultaneously introduced, and the adjustment can be made according to the seasonal change or the gas-solid ratio. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings, which form a part of this application, are used to provide further understanding of the application, and make the other features, purposes and advantages of the application more apparent. The illustrative embodiments of the drawings of the application and the description thereof are used to explain the application, and do not constitute an improper limitation on the application. In the drawings: Figure 1is a system schematic diagram of a combined system of interactive utilization of a rotary kiln and a biomass gasification device according to an embodiment of the present application; Figure 2 is a system schematic diagram of a combined system of interactive utilization of a rotary kiln and a biomass gasification device according to an embodiment of the present application with a drying device; Figure 3 is a structural schematic diagram of a biomass gasification furnace according to an embodiment of the present application; Figure 4 is a structural schematic diagram of a fuel regulator according to an embodiment of the present application; Figure 5 is a side view of a solid fuel pipeline according to an embodiment of the present application; Figure 6 is a structural schematic diagram of a guide vane in a solid fuel pipeline according to an embodiment of the present application.

[0020] 1, rotary kiln; 2, decomposition furnace; 3, air inlet; 4, biomass bin; 5, feed inlet; 6, biomass gasification furnace; 7, gas outlet; 8, mixed fuel pipeline; 81, solid fuel pipeline; 82, gas fuel pipeline; 83, conveying pipeline; 84, guide vane; 9, discharge outlet; 10, solid material bin; 11, fuel bin; 12, mixing bin; 13, air blower; 14, fuel regulator; 15, upper grid plate; 16, lower grid plate; 17, gas outlet pipeline; 18, bulk material outlet; 19, drying device; 20, guide plate. DETAILED DESCRIPTION

[0021] In order to make the personnel in the technical field better understand the present application scheme, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without making creative labor should belong to the scope of protection of the present application.

[0022] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so as to describe the embodiments of the present application.

[0023] In the present application, the terms "upper", "lower", "inner", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0024] And, the above-mentioned partial terms, in addition to can be used to express the orientation or positional relationship, can also be used to express other meanings, for example, the term "upper" may also be used to express a certain dependent relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meaning of these terms in this application can be understood according to the specific circumstances.

[0025] In addition, the terms "set", "provided with", "connected", "fixed" and the like should be broadly understood. For example, "connected" can be fixedly connected, detachably connected, or integrally configured; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, or internal communication between two devices, elements or components. For those of ordinary skill in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0026] In addition, the term "a plurality of" means two and more than two.

[0027] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0028] The present embodiment provides a specific implementation of a combined system for the interaction of a rotary kiln 1 and a biomass gasification device product, as shown in Figure 1 The rotary kiln 1, the biomass gasification furnace 6, the biomass bin 4, the decomposition furnace 2, the fuel regulator 14, the fuel bin 11, and the solid bin 10 are connected as follows: the material outlet of the rotary kiln 1 is connected to the decomposition furnace 2, the gas outlet of the decomposition furnace 2 is connected to the biomass gasification furnace 6, the biomass bin 4 is connected to the biomass gasification furnace 6 and provides material for the biomass gasification furnace 6, the material in the biomass gasification furnace 6 produces solid products and gas products after gasification, the solid products are transported to the solid bin 10, the solid bin 10 is connected to the fuel regulator 14, the solid products and the gas products enter the rotary kiln 1 through the fuel regulator 14, and the fuel in the fuel bin 11 enters the rotary kiln 1 through the fuel regulator 14. The fuel regulator 14 can adjust the proportion of the solid products, the gas products and the fuel entering the rotary kiln 1.

[0029] Specifically, the biomass gasification furnace 6 is provided with an air inlet 3, an air outlet 7, a feed inlet 5 and a discharge outlet 9, wherein 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 bin 10.

[0030] In the embodiment, the drying device 19, the crushing device and the grinding device are sequentially arranged between the biomass gasification furnace 6 and the solid bin 10, and the solid product generated by the biomass gasification furnace 6 needs to be dried, crushed and ground before being delivered to the solid bin 10. In the embodiment, the gas outlet of the biomass gasification furnace 6 is connected to the drying device 19, the gas outlet of the drying device 19 is connected to the fuel regulator 14, and the gas product generated by the biomass gasification furnace 6 flows through the drying device 19 before entering the fuel regulator 14. When the gas product flows through the drying device 19, the solid product can be dried, so that the solid product does not need an additional heat source when being dried. Meanwhile, the gas product generated by the biomass gasification furnace 6 needs to be cooled before entering the fuel regulator 14, and the temperature of the gas product can be further reduced during the drying of the solid product, so that the system products can be jointly utilized.

[0031] Further, as shown in Figure 2 the drying device 19 includes a drying furnace and a conveying belt. The inlet of the drying furnace is connected to the biomass gasification furnace 6, and the outlet of the drying furnace is connected to the crushing device. The conveying belt is arranged in the drying furnace, and the drying furnace is provided with an air inlet and an air outlet. The air inlet is connected to the gas outlet of the biomass gasification furnace 6, and the air outlet is connected to the fuel regulator 14. In this way, the solid product generated by the biomass is delivered to the conveying belt, and the gas product generated by the biomass gasification furnace 6 enters the drying furnace to dry the solid product when the solid product moves on the conveying belt to the crushing device.

[0032] In the embodiment, the air inlet is located at the downstream position of the conveying belt, and the air outlet is located at the upstream position of the conveying belt. In this way, the flow direction of the gas flow is opposite to the conveying direction of the solid product, so that the drying time of the gas product on the solid product can be increased, and the drying efficiency of the solid product can be improved.

[0033] Further, the mixing bin 12 is further included. The fuel provided by the fuel bin 11 and the solid product generated by the biomass gasification furnace 6 are both delivered to the mixing bin 12 to be mixed to form solid fuel. The gas product forms gas fuel, and the solid fuel and the gas fuel are both delivered to the fuel regulator 14. The fuel regulator 14 can adjust the proportion of the gas fuel and the solid fuel.

[0034] Specifically, before entering the mixing bin 12, the solid product and the fuel need to be weighed to control the mass of the solid product and the fuel entering the mixing bin 12.

[0035] In the embodiment, the air blower 13 is further included, and the air blower 13 blows to the fuel regulator 14 to spray the mixed solid fuel and gas fuel into the rotary kiln 1.

[0036] In this embodiment, the gas product produced by the biomass gasifier 6 needs to pass through a cyclone separator for rough dust removal of the gas; then pass through a bag filter for fine dust removal of the gas, and then pass through a catalytic cracking tower for tar removal; then pass through a water washing tower for cooling, and then pass through a dry desulfurization tower for sulfur removal, and finally pass through an adsorption drying tower for dehydration, and then be injected into the rotary kiln 1 through the fuel regulator 14. Specifically, the cyclone separator, the bag filter, the catalytic cracking tower, the water washing tower, the dry desulfurization tower, and the adsorption drying tower are sequentially arranged between the biomass gasifier 6 and the fuel regulator 14, wherein the gas product after passing through the catalytic cracking tower for tar removal is introduced into the drying device 19 for drying the solid product, that is, the outlet of the catalytic cracking tower is communicated with the gas inlet of the drying furnace, and the gas outlet of the drying furnace is communicated with the inlet of the water washing tower. The solid product and the gas product can be utilized mutually in the process of treatment to reduce the consumption of additional energy.

[0037] In this embodiment, the biomass gasifier 6 is provided with a guide plate 20 at the lower part, the inner diameter of the guide plate 20 gradually decreases from bottom to top, and the flue gas generated by the decomposition furnace 2 is injected from the bottom of the biomass gasifier 6. In the process of flowing 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 becomes larger again, so that the flue gas can form a turbulent flow when leaving the guide plate 20, thereby better mixing with the biomass material.

[0038] In this embodiment, as shown in Figure 3 The biomass gasifier 6 is provided with two layers of grid plates, namely an upper grid plate 15 and a lower grid plate 16, both of which are located above the guide plate 20. The gasification space for biomass gasification is formed between the upper grid plate 15 and the lower grid plate 16. The grid plate can buffer the biomass material falling from above, so that the biomass material can stay for a long time to complete the biomass gasification. Among them, the upper grid plate 15 can carry more biomass material. When the biomass material gradually enters the gasification space, the upward flue gas can be accelerated and form a turbulent flow, so that it can fully mix with the biomass material in the gasification space, thereby improving the efficiency of biomass gasification. At the same time, the arrangement of the two layers of grid plates can also make the biomass gasification more thorough.

[0039] In this embodiment, the gas outlet of the decomposition furnace 2 is communicated with the gas inlet of the biomass gasifier 6, and the gas inlet of the biomass gasifier 6 is located at the bottom of the biomass gasifier 6. A plurality of gas outlet pipes 17 are arranged at the gas inlet of the biomass gasifier 6, which can uniformly spray the flue gas produced by the decomposition furnace 2 in the biomass gasifier 6.

[0040] In this embodiment, the biomass bin 4 is communicated with the feeding port 5 of the biomass gasifier 6, the feeding port 5 is located at the top of the biomass gasifier 6, and a horn-shaped scattering port 18 is arranged at the feeding port 5, so that the biomass material can be uniformly dispersed in the biomass gasifier 6 when falling, so as to make the biomass gasification of the biomass material more sufficient.

[0041] In this embodiment, as shown in Figure 4 、 Figure 5 and Figure 6 , the fuel conditioner 14 is communicated with the rotary kiln 1 through the mixed fuel pipeline 8, the mixed fuel pipeline 8 includes a solid fuel pipeline 81, a gas fuel pipeline 82, and a conveying pipeline 83, wherein the gas fuel pipeline 82 is connected to the solid fuel pipeline 81 as a branch, and the outlet of the solid fuel pipeline 81 is communicated with the inlet of the conveying pipeline 83; the solid fuel pipeline 81 and the conveying pipeline 83 each include an inner tube and an outer tube, wherein the inner tube of the solid fuel pipeline 81 is connected with the inner tube of the conveying pipeline 83, and the outer tube of the solid fuel pipeline 81 is connected with the outer tube of the conveying pipeline 83, the inner tube is used for solid fuel to pass through, and the annular area formed between the outer tube and the inner tube is communicated with the gas fuel pipeline 82 for gas fuel to pass through. In this way, the outlets of the gas fuel pipeline 82 and the solid fuel pipeline 81 are converged together, so that when connected with the rotary kiln 1, only one inlet needs to be opened on the rotary kiln 1, without the need to open two inlets for gas fuel and solid fuel respectively, which reduces the opening of the inlet, reduces the processing of the inlet of the rotary kiln 1, and also avoids the heat dissipation of the rotary kiln 1.

[0042] In this embodiment, the solid fuel pipeline 81 is provided with guide vanes 84, the inclination direction of the guide vanes 84 is towards the conveying pipeline 83, wherein the guide vanes 84 are distributed on the inner wall of the solid fuel pipeline 81, and the gas fuel can be guided to flow to the conveying pipeline 83 through the guide vanes 84 after entering the annular area, so as to avoid the accumulation of gas fuel in the annular area.

[0043] In this embodiment, the solid product produced by the biomass gasifier 6 is solid carbon, and the gas product is biomass gas. The fuel mentioned in this embodiment is coal powder.

[0044] In this embodiment, gas and solid can be used as fuel for combustion alone, or can be combined with each other, such as gas-solid (70%-100%: 0%-30%), gas-coal (0%-50%: 50%-100%), and solid-coal (0%-30%: 70%-100%) as fuel, or three of them can be combined (gas: solid: coal—35%-50%: 0%-15%: 50%) for combustion. And the entire biomass gasification device is independent of the original rotary kiln device, when the biomass has seasonal limitations, it can return to the original (only coal burning) operation mode.

[0045] The following is explained with specific cases: The production of a ton of cement requires the consumption of coal about 120-130 kg, the calorific value of bituminous coal is higher than 25 MJ / kg, in order to ensure the ratio of solid products and gas products, through certain experimental data analysis, the solid products and gas products are sprayed into the rotary kiln as the replacement of coal, the amount of coal that can be replaced is about 50%. The yield of solid products in the process of biomass gasification is less than 30%, the calorific value is higher than 26 MJ / kg, the yield of gas products is higher than 70%, using the following formula, the calorific value of gas products is higher than 11 MJ / kg.

[0046] , The overall conversion calorific value, The volume fraction of the i-th combustible component, The high calorific value of the i-th combustible component, The standard density of the i-th combustible gas species.

[0047] , The amount of carbon dioxide emission reduction, The weight of the replaced coal, The carbon content of bituminous coal, The combustion efficiency, The molar ratio, The gas volume percentage, The gas density, The weight of the biomass gas component in the replaced bituminous coal.

[0048] Case 1 Taking 600℃ as the reaction condition of the gasification process, the specific implementation steps are as follows: The heat value of the bituminous coal used in the rotary kiln is 25 MJ / kg, the carbon content is 75%, the combustion efficiency is 95%, and 130 kg of coal is needed to produce 1 t of cement. The carbon yield of the biomass byproduct is 28.49%, and the heat value is 30.30 MJ / kg. The biomass gas yield is 71.51%, and the total heat value is 11.71 MJ / kg (the contents of CH4, CO, and H2 are 5%, 30%, and 5%, respectively, and the heat values are fixed at 38.5 MJ / m3, 12.6 MJ / m3, and 10.8 MJ / m3, respectively). At this time, the mass ratio of the biomass byproduct carbon, the biomass gas, and the coal powder needed to produce 1 t of cement is 22.05:55.33:77.38 kg, and the amount of the bituminous coal replaced is 22.62 kg. The amount of carbon dioxide emission reduction of the replaced bituminous coal is 59.10 kg of carbon dioxide, which is calculated by using formula (2). The consumption amount (emission reduction amount) of carbon dioxide in the operation process of the biomass gasifier is 11.11 kg of carbon dioxide. Thus, the total carbon dioxide emission reduction in the production process is 70.21 kg of carbon dioxide.

[0049] Case 2 The reaction condition of the gasification process is 700℃, and the specific implementation steps are as follows: The heat value of the bituminous coal used in the rotary kiln is 26 MJ / kg, the carbon content is 80%, the combustion efficiency is 94%, and 125 kg of coal is needed to produce 1 t of cement. The carbon yield of the biomass byproduct is 25.06%, and the heat value is 29.69 MJ / kg. The biomass gas yield is 74.94%, and the total heat value is 20.33 MJ / kg (the contents of CH4, CO, and H2 are 8%, 40%, and 10%, respectively). At this time, the mass ratio of the biomass byproduct carbon, the biomass gas, and the coal powder needed to produce 1 t of cement is 15.75:47.13:62.89 kg, the amount of the bituminous coal replaced is 37.11 kg, the amount of carbon dioxide emission reduction of the replaced bituminous coal is 102.33 kg of carbon dioxide, which is calculated by using the second formula, and the consumption amount (emission reduction amount) of carbon dioxide in the operation process of the biomass gasifier is 7.19 kg of carbon dioxide. Thus, the total carbon dioxide emission reduction in the production process is 109.52 kg of carbon dioxide.

[0050] Case 3 The reaction condition of the gasification process is 800℃, and the specific implementation steps are as follows: The heat value of bituminous coal used in the rotary kiln is 27 MJ / kg, the carbon content is 85%, the combustion efficiency is 93%, and the amount of coal consumed to produce 1 t of cement is 120 kg. The carbon yield of the biomass byproduct is 20.33%, and the heat value is 28.09 MJ / kg. The biomass gas yield is 79.67%, and the total heat value is 28.42 MJ / kg (of which the CH4, CO, and H2 contents are 10%, 50%, and 15%, respectively). At this time, the mass ratio of the biomass byproduct carbon, biomass gas, and coal powder required to produce 1 t of cement is 10.92:42.76:53.68 kg, the amount of bituminous coal replaced is 46.32 kg, the amount of carbon dioxide emission reduction calculated using the second formula is 134.27 kg of carbon dioxide, the amount of carbon dioxide consumed (emission reduction) during the operation of the biomass gasifier is 4.53 kg of carbon dioxide, and thus the total carbon dioxide emission reduction in the production process is 138.8 kg of carbon dioxide.

[0051] The yield and heat value of the biomass gasification solid product in Case 1-3 are as follows: In Case 1, the carbon yield of the biomass byproduct is 28.49%, and the heat value is 30.30 MJ / kg.

[0052] In Case 2, the carbon yield of the biomass byproduct is 25.06%, and the heat value is 29.69 MJ / kg.

[0053] In Case 3, the carbon yield of the biomass byproduct is 20.33%, and the heat value is 28.09 MJ / kg.

[0054] Preparation step: weigh about 26 g of the original sample with an ash dish, place the weighed sample into a tube furnace, close the opening, set the air flow to 400-500 ml / min, pass for about 10 min, completely discharge the air in the furnace, then heat up at a rate of 10°C / min, continue to heat for 60 min after the temperature reaches the set temperature, take out the solid byproduct after the reaction is completed, calculate the carbon yield, and perform industrial analysis and elemental analysis on the carbon material to calculate the heat value.

[0055] In Cases 1-3, the heat value is calculated using the previous gasification experiment.

[0056] HHV = 0.349C + 1.1783H + 0.1005S - 0.1034O - 0.0015N - 0.0211A Energy yield = (original sample heat value / solid byproduct heat value) * solid byproduct carbon yield * 100%.

[0057] Table 1 Industrial analysis and elemental analysis of different samples , In Table 1, the composition of each component in the proximate analysis and elemental analysis of the original sample at different temperatures, and the high heating value (HHV) are shown, for example, the composition of volatile matter (V), ash (A), and fixed carbon (FC) in the proximate analysis, and the composition of carbon (C), hydrogen (H), oxygen (O), nitrogen (N), and sulfur (S) in the elemental analysis.

[0058] The preferred embodiments of the present application are described above, and are not intended to limit the present application. The present application can be variously changed and modified by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of the present application.

Claims

1. A combined system of a rotary kiln and biomass gasification device product interaction utilization, characterized in that, The application relates to a biomass gasification system, which comprises: a rotary kiln, a biomass gasification furnace, a biomass bin, a decomposition furnace, a fuel regulator, a fuel bin, a solid bin and a drying device; a material outlet of the rotary kiln is communicated with the decomposition furnace, a gas outlet of the decomposition furnace is communicated with the biomass gasification furnace, the biomass bin is communicated with the biomass gasification furnace and provides material for the biomass gasification furnace, solid products and gas products are generated after biomass gasification of the material in the biomass gasification furnace, a gas outlet of the biomass gasification furnace is communicated with the drying device, a gas outlet of the drying device is communicated with the fuel regulator, the solid products are transported to the solid bin after drying, the solid bin is communicated with the fuel regulator, the gas products dry the solid products when flowing through the drying device, the solid products and the gas products enter the rotary kiln through the fuel regulator, fuel of the fuel bin enters the rotary kiln through the fuel regulator, and the fuel regulator is used for regulating the proportion of the solid products, the gas products and the fuel entering the rotary kiln.

2. The combined system of a rotary kiln and a biomass gasification device product interaction utilization according to claim 1, characterized in that, The biomass gasification system further comprises a crushing device and a grinding device, which are sequentially arranged between the drying device and the solid bin, and the solid products are transported to the solid bin after drying, crushing and grinding.

3. The combined system of a rotary kiln and a biomass gasification device product interaction utilization according to claim 2, characterized in that, The drying device comprises a drying furnace and a conveying belt, an inlet of the drying furnace is communicated with the biomass gasification furnace, an outlet of the drying furnace is communicated with the crushing device, the conveying belt is arranged in the drying furnace, an air inlet and an air outlet are arranged on the drying furnace, the air inlet is communicated with the gas outlet of the biomass gasification furnace, the air outlet is communicated with the fuel regulator, the air inlet is located at a downstream position of the conveying belt, and the air outlet is located at an upstream position of the conveying belt.

4. The combined system of a rotary kiln and a biomass gasification device product interaction utilization according to claim 1, characterized in that, The biomass gasification system further comprises a mixing bin, the fuel bin provides fuel to the mixing bin, the solid products in the biomass gasification furnace are transported into the mixing bin to mix with the fuel to form solid fuel, the gas products form gas fuel, and an outlet of the mixing bin is communicated with the fuel regulator.

5. The combined system of a rotary kiln and a biomass gasification device product interaction utilization according to claim 4, characterized in that, The biomass gasification system further comprises a blower, the blower blows towards the fuel regulator to spray the mixed solid fuel and gas fuel into the rotary kiln.

6. The combined system of a rotary kiln and a biomass gasification plant product interaction utilization according to claim 1, characterized in that, A guide plate is arranged at a lower portion of the biomass gasification furnace, and an inner diameter of the guide plate gradually decreases from bottom to top.

7. The combined system of a rotary kiln and a biomass gasification device product interaction utilization according to claim 6, characterized in that, Two layers of grid plates are arranged in the biomass gasification furnace, namely an upper grid plate and a lower grid plate, and the two layers of grid plates are located above the guide plate. A gasification space for biomass gasification of the material is formed between the upper grid plate and the lower grid plate.

8. The combined system of a rotary kiln and a biomass gasification device product interaction utilization according to claim 1, characterized in that, A gas outlet of the decomposition furnace is communicated with an air inlet of the biomass gasification furnace, and the air inlet of the biomass gasification furnace is located at a bottom portion of the biomass gasification furnace. A plurality of air outlet pipelines are arranged at the air inlet of the biomass gasification furnace, and the plurality of air outlet pipelines are used for uniformly spraying flue gas generated by the decomposition furnace in the biomass gasification furnace.

9. The combined system of a rotary kiln and a biomass gasification device product interaction utilization according to claim 1, characterized in that, The biomass bin is communicated with a feeding inlet of the biomass gasification furnace, and the feeding inlet is located at a top portion of the biomass gasification furnace. The biomass gasification furnace is provided with a horn-shaped material dispersing port at the feeding port, so that the material is uniformly dispersed in the biomass gasification furnace.

10. The integrated system of a rotary kiln and a biomass gasification plant product interaction utilization according to claim 1, characterized in that, The fuel regulator is communicated with the rotary kiln through a mixed fuel pipeline, and the mixed fuel pipeline comprises: A solid fuel pipeline, a gas fuel pipeline and a conveying pipeline, the gas fuel pipeline is connected to the solid fuel pipeline as a branch, the outlet of the solid fuel pipeline is communicated with the inlet of the conveying pipeline; The solid fuel pipeline and the conveying pipeline each comprise an inner tube and an outer tube, the inner tube is used for solid fuel passing, and the annular area between the inner tube and the outer tube is communicated with the gas fuel pipeline and used for gas fuel passing.

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