Biomass gasification system and biomass combustion energy system

Abstract

The invention discloses a biomass gasification system and a biomass energy system, the biomass gasification system comprises: a gasification furnace having a material inlet and a mixed outlet; the gas-solid separation device is provided with a gas outlet, a solid outlet and a mixed inlet, and the mixed inlet is connected with the mixed outlet; the drying device comprises a box body, the box body is provided with a first inlet, a second inlet, a first outlet and a second outlet, the first inlet is used for feeding incoming materials, the second inlet is connected with the solid outlet, the first outlet is used for discharging steam, and the second outlet is connected with the material inlet. According to the biomass gasification system disclosed by the invention, the returned material from the gas-solid separation device can be used for drying the supplied material, so that the water content in the supplied material is reduced, the quality of the gasified gas is improved, the working condition of subsequent combustion is improved, the storage pressure is reduced, and the energy consumption and the cost are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of biomass burning energy systems, and in particular to a biomass gasification system and a biomass burning energy system. Background Art

[0002] The current biomass gasification system can generally be divided into two types: fixed bed reactors and fluidized bed reactors. In the technology of high-level energy utilization of biomass, the bubbling bed fluidized bed gasifier has excellent heat and mass transfer performance, good gas-solid mixing performance, wide fuel flexibility and strong load adaptability. It is a clean and efficient equipment widely used in the chemical industry. Although biomass resources have many advantages, most biomass fuels have a high water content, which reduces their calorific value, thereby reducing the utilization efficiency of the boiler. In addition, when using biomass fuels with low calorific value and high water content, the quality of the gasified gas will be reduced, the combustion conditions will deteriorate, and the environmental protection parameters of the unit will be abnormal, exacerbating the emission of pollutants.

[0003] Therefore, in order to reduce the moisture content of fuel, the biomass fuel needs to be ventilated and dried or spread out for more than one week before use, which invisibly increases the storage and management costs of the power plant. Alternatively, the material can be dried by active baking, but this method will increase energy consumption and production costs. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a biomass gasification system, which reduces the water content in the incoming material, improves the quality of the gasified gas, improves the working conditions of the subsequent combustion, reduces the storage pressure, and reduces the energy consumption and cost.

[0005] The present invention also proposes a biomass burning energy system, comprising the above-mentioned biomass gasification system.

[0006] According to an embodiment of the present invention, a biomass gasification system includes: a gasifier, the gasifier having a material inlet and a mixing outlet; a gas-solid separation device, the gas-solid separation device having a gas outlet, a solid outlet and a mixing inlet, the mixing inlet being connected to the mixing outlet; a drying device, the drying device including a box body, the box body having a first inlet, a second inlet, a first outlet and a second outlet, the first inlet being used for incoming material, the second inlet being connected to the solid outlet, the first outlet being used for draining water vapor, and the second outlet being connected to the material inlet.

[0007] According to the biomass gasification system of the embodiment of the present invention, the gasifier has a material inlet and a mixing outlet; the gas-solid separation device has a gas outlet, a solid outlet and a mixing inlet, and the mixing inlet is connected to the mixing outlet; the box body has a first inlet, a second inlet, a first outlet and a second outlet, the first inlet is used for incoming materials, the second inlet is connected to the solid outlet, the first outlet is used to drain water vapor, and the second outlet is connected to the material inlet, so that the return material from the gas-solid separation device can be used to dry the incoming material, which not only reduces the water content in the incoming material, improves the quality of the gasification gas, improves the working conditions of subsequent combustion, reduces storage pressure, and reduces energy consumption and costs.

[0008] In some embodiments of the present invention, a stirring device is provided in the box body for stirring the return material and the incoming material.

[0009] In some embodiments of the present invention, a temperature sensor and / or a humidity sensor is provided in the box.

[0010] In some embodiments of the present invention, a fan is provided at the first outlet to drive the water vapor to be discharged from the first outlet.

[0011] In some embodiments of the present invention, a solenoid valve is provided at the second outlet to control the opening and closing of the second outlet.

[0012] In some embodiments of the present invention, the first outlet is located at the upper end of the box; and / or, the second outlet is located at the lower end of the box; and / or, the first inlet is located at the upper end of the box; and / or, the gas-solid separation device is located above the box, the solid outlet is provided at the lower end of the gas-solid separation device, and the second inlet is located at the upper end of the box.

[0013] In some embodiments of the present invention, the gas-solid separation device includes a return box and a cyclone separator, the cyclone separator is arranged in the return box, and the gas outlet, the solid outlet and the mixing inlet are arranged on the return box.

[0014] In some embodiments of the present invention, the cross-section of the lower portion of the return box gradually decreases from top to bottom.

[0015] In some embodiments of the present invention, an air-lock feeder is provided between the material inlet and the second outlet.

[0016] The biomass burning energy system according to an embodiment of the present invention includes the above-mentioned biomass gasification system.

[0017] According to the biomass burning energy system of the embodiment of the present invention, by setting the above-mentioned biomass gasification system, the gasifier has a material inlet and a mixing outlet; the gas-solid separation device has a gas outlet, a solid outlet and a mixing inlet, and the mixing inlet is connected to the mixing outlet; the box body has a first inlet, a second inlet, a first outlet and a second outlet, the first inlet is used for incoming materials, the second inlet is connected to the solid outlet, the first outlet is used to drain water vapor, and the second outlet is connected to the material inlet, so that the return material from the gas-solid separation device can be used to dry the incoming material, which not only reduces the water content in the incoming material, improves the quality of the gasified gas, improves the working conditions of subsequent combustion, and reduces storage pressure, energy consumption and cost.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 Schematic diagram of a biomass burning energy system according to an embodiment of the present invention.

[0021] Reference numerals:

[0022] 100. Biomass energy system;

[0023] 10. Biomass gasification system;

[0024] 1. Gasifier; 11. Material inlet; 12. Mixing outlet;

[0025] 2. Gas-solid separation device; 21. Return box; 211. Gas outlet; 212. Solid outlet; 213. Mixing inlet; 22. Cyclone separator;

[0026] 3. Drying device; 31. Box body; 311. First inlet; 312. Second inlet; 313. First outlet; 314. Second outlet; 32. Stirring device; 33. Fan;

[0027] 20. Combustion furnace;

[0028] 30. Tail flue assembly; 301. Heat exchange device. DETAILED DESCRIPTION

[0029] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Reference below Figure 1 A biomass gasification system 10 according to an embodiment of the present invention is described.

[0033] like Figure 1 As shown, the biomass gasification system 10 according to an embodiment of the present invention includes: a gasifier 1 , a gas-solid separation device 2 and a drying device 3 .

[0034] Specifically, refer to Figure 1 The gasifier 1 has a material inlet 11 and a mixing outlet 12; the gas-solid separation device 2 has a gas outlet 211, a solid outlet 212 and a mixing inlet 213, and the mixing inlet 213 is connected to the mixing outlet 12; the drying device 3 includes a box body 31, the box body 31 has a first inlet 311, a second inlet 312, a first outlet 313 and a second outlet 314, the first inlet 311 is used for incoming materials, the second inlet 312 is connected to the solid outlet 212, the first outlet 313 is used to drain water vapor, and the second outlet 314 is connected to the material inlet 11.

[0035] It should be noted that the biomass gasification system 10 is used for the biomass energy system 100, which includes a combustion furnace 20. The gasification furnace 1 mainly includes a wind chamber, an air distribution plate, a combustion chamber, a furnace, etc. The furnace is composed of a membrane water-cooled wall, and the water-cooled wall is lined with castables. The dry material falls into the turbulent bed layer. The high-temperature air provided by the high-temperature air bellows blows the material falling on the turbulent bed layer through the air distribution device to fluidize and pyrolyze and gasify. The gasified gas can enter the combustion furnace 20 for combustion. The gasification furnace 1 and the combustion furnace 20 are known to ordinary technicians in the field and will not be described in detail here.

[0036] It can be understood that after the material is gasified in the gasifier 1, it forms a mixture of gas and solid, and the mixture enters the gas-solid separation device 2 through the mixing outlet 12 and the mixing inlet 213 in turn. The gas-solid separation device 2 separates the mixture, so that the gas enters the combustion furnace 20 from the gas outlet 211 for combustion, and the solid is formed as return material (material that is not completely gasified and needs to be further gasified) and enters the box body 31 through the solid outlet 212 and the second inlet 312 in turn. At this time, the incoming material enters from the first inlet 311, and the return material is in a high temperature state at this time. Through the contact and mixing of the return material and the incoming material, the return material can heat the moisture in the incoming material, so that the moisture in the incoming material evaporates and is discharged from the first outlet 313. The fully mixed incoming material and return material enter the gasifier 1 through the second outlet 314 and the material inlet 11 in turn for gasification.

[0037] Therefore, in the present invention, the residual heat of the returned material can be used to dry the incoming material, which not only reduces the water content in the incoming material, but also improves the quality of the gasification gas and the working conditions of the subsequent combustion. There is no need to dry the incoming material in the sun or use a drying device, which reduces storage pressure, energy consumption and costs.

[0038] According to the biomass gasification system 10 of the embodiment of the present invention, the gasifier 1 has a material inlet 11 and a mixing outlet 12; the gas-solid separation device 2 has a gas outlet 211, a solid outlet 212 and a mixing inlet 213, and the mixing inlet 213 is connected to the mixing outlet 12; the box body 31 has a first inlet 311, a second inlet 312, a first outlet 313 and a second outlet 314, the first inlet 311 is used for incoming materials, the second inlet 312 is connected to the solid outlet 212, the first outlet 313 is used to drain water vapor, and the second outlet 314 is connected to the material inlet 11, so that the return material from the gas-solid separation device 2 can be dried for the incoming material, which not only reduces the water content in the incoming material, improves the quality of the gasified gas, improves the working conditions of subsequent combustion, reduces storage pressure, and reduces energy consumption and cost.

[0039] In some embodiments of the present invention, Figure 1 As shown, a stirring device 32 is provided in the box 31 for stirring the return material and the incoming material. Thus, the return material and the incoming material can be fully contacted and mixed, thereby further improving the drying efficiency of the return material on the incoming material, improving the efficiency of evaporating the water in the incoming material, thereby further reducing the water content in the incoming material, improving the quality of the gasified gas, and improving the subsequent combustion conditions.

[0040] In some embodiments of the present invention, a temperature sensor and / or a humidity sensor (not shown in the figure) are provided in the box 31. For example, only a temperature sensor, only a humidity sensor, or both a temperature sensor and a humidity sensor may be provided in the box 31. Thus, it is convenient for the manager or the system to control the state of the mixed material of the return material and the incoming material in the box 31, so that the return material and the incoming material can be fully mixed and contacted, so that the mixed material can enter the gasifier 1 in the best state, thereby further improving the quality of the gasified gas and improving the working conditions of the subsequent combustion.

[0041] In some embodiments of the present invention, Figure 1 As shown, a fan 33 is provided at the first outlet 313, which is used to drive the water vapor to be discharged from the first outlet 313. It can be understood that the provision of the fan 33 can increase the discharge speed of the water vapor, thereby reducing the retention of water vapor in the box body 31, thereby indirectly improving the efficiency of evaporation of water in the incoming material, thereby further reducing the water content in the incoming material, improving the quality of the gasified gas, and improving the subsequent combustion conditions.

[0042] In addition, a humidity sensor is provided in the box 31. The fan 33 cooperates with the humidity sensor to better control the discharge speed of water vapor. When the humidity in the box 31 is too high, the rotation speed of the fan 33 can be increased to speed up the discharge of water vapor. When the humidity in the box 31 is low, the rotation speed of the fan 33 can be reduced, thereby achieving energy saving effect, and at the same time, it can also reduce the occurrence of incoming and returned materials being blown up.

[0043] In some embodiments of the present invention, a solenoid valve (not shown) is provided at the second outlet 314 to control the opening and closing of the second outlet 314. It is understood that when the return material and the incoming material are not fully mixed, the solenoid valve is closed, so that the return material and the incoming material can be fully mixed in the box 31; when the return material and the incoming material are fully mixed, the solenoid valve is opened, so that the mixed material can enter the gasifier 1. Therefore, the setting of the solenoid valve ensures that the return material and the incoming material can be fully contacted and mixed before entering the gasifier 1.

[0044] Furthermore, a temperature sensor and / or a humidity sensor are provided in the box 31, and in combination with the temperature sensor and / or the humidity sensor, it is convenient for the administrator or the system to judge whether the return material and the incoming material are fully mixed. For example, when the temperature rises to a first preset value and / or the humidity drops to a second preset value, it is determined that the return material and the incoming material have been fully mixed, and the water in the incoming material is almost completely evaporated, so that the solenoid valve is opened, so that the mixed material can enter the gasifier 1 for gasification.

[0045] In some embodiments of the present invention, Figure 1 As shown, the first outlet 313 is located at the upper end of the box body 31; it can be understood that the evaporated water vapor will flow upward due to buoyancy, and the first outlet 313 is arranged at the upper end of the box body 31, so as to facilitate the evaporated water vapor to flow out from the first outlet 313, thereby further increasing the rate of water vapor discharge, reducing the retention of water vapor in the box body 31, and improving the efficiency of water evaporation in the incoming material, thereby further reducing the water content in the incoming material, improving the quality of the gasified gas, and improving the subsequent combustion conditions.

[0046] In some embodiments of the present invention, Figure 1 As shown, the second outlet 314 is located at the lower end of the box body 31 ; thereby, it is convenient for the mixed material to enter the gasifier 1 under the action of gravity, and the retention and accumulation of the mixed material in the box body 31 is reduced.

[0047] In some embodiments of the present invention, Figure 1 As shown, the first inlet 311 is located at the upper end of the box body 31; thereby, it is prevented that incoming materials accumulate and block the first inlet 311, so that the incoming materials can enter smoothly.

[0048] In some embodiments of the present invention, Figure 1 As shown, the gas-solid separation device 2 is located above the box 31, the solid outlet 212 is provided at the lower end of the gas-solid separation device 2, and the second inlet 312 is located at the upper end of the box 31. Thus, it is convenient for the return material to enter the box 31, and the accumulation of the return material in the gas-solid separation device 2 is reduced.

[0049] In some embodiments of the present invention, Figure 1 As shown, the gas-solid separation device 2 includes a return box 21 and a cyclone separator 22, the cyclone separator 22 is arranged in the return box 21, and the gas outlet 211, the solid outlet 212 and the mixed inlet 213 are arranged on the return box 21. It can be understood that the arrangement of the cyclone separator 22 realizes the separation of the gas-solid mixture, so that the gas can flow out from the gas outlet 211, and the solid (returned material) can enter the box body 31 from the solid outlet 212 and the second inlet 312.

[0050] In some embodiments of the present invention, Figure 1As shown, the cross section of the lower part of the return box 21 gradually decreases from top to bottom. As a result, the inner wall surface of the lower part of the return box 21 is an inclined surface, which plays a guiding effect, allowing the return material to better enter the box body 31 along the inner wall surface of the lower part of the return box 21, reducing the spillage of the return material.

[0051] In some embodiments of the present invention, an air-lock feeder is provided between the material inlet 11 and the second outlet 314. Thus, gas exchange between the box 31 and the gasifier 1 can be avoided, and water vapor can be prevented from entering the gasifier 1, or gasification gas in the gasifier 1 can be prevented from entering the box 31.

[0052] Among them, the airlock feeder is usually composed of a plurality of mutually sealed chambers, and each chamber realizes the gradual transmission of materials through rotation or reciprocating motion. The mixed material enters the first chamber, at which time the chamber is connected to the atmosphere, but isolated from the subsequent chamber and the gasifier 1. The first chamber is closed and isolated from the atmosphere to form a sealed environment. The chamber rotates or moves to bring the material into the next chamber while maintaining a sealed state. The material eventually enters the gasifier 1, and the gas is locked in the chamber and cannot escape. As a result, the gas exchange between the box 31 and the gasifier 1 is isolated.

[0053] Reference below Figure 1 A biomass-fired energy system 100 according to an embodiment of the present invention is described.

[0054] like Figure 1 As shown, the biomass burning energy system 100 according to an embodiment of the present invention includes the above-mentioned biomass gasification system 10.

[0055] Furthermore, if Figure 1 As shown, the biomass burning energy system 100 also includes a combustion furnace 20 and a tail flue assembly 30. The air inlet of the combustion furnace 20 is connected to the gas outlet 211 of the gas-solid separation device 2. The tail flue assembly 30 has a flue. The tail flue assembly 30 includes a plurality of membrane walls and a heat exchange device 301. The plurality of membrane walls are arranged around the flue. The heat exchange device 301 is arranged on the membrane wall. The air outlet of the combustion furnace 20 is connected to the flue.

[0056] The gasified gas separated from the gas-solid separation device 2 enters the combustion furnace 20 through the gas outlet 211 and the air inlet for combustion. The high-temperature tail gas formed after combustion enters the flue and the heat exchange device 301 for heat exchange. The heat exchange medium (such as water) in the heat exchange device 301 takes out the heat and supplies energy to the terminal. The tail gas is discharged from the flue outlet after harmless treatment.

[0057] According to the biomass burning energy system 100 of the embodiment of the present invention, by setting the above-mentioned biomass gasification system 10, the gasifier 1 has a material inlet 11 and a mixing outlet 12; the gas-solid separation device 2 has a gas outlet 211, a solid outlet 212 and a mixing inlet 213, and the mixing inlet 213 is connected to the mixing outlet 12; the box body 31 has a first inlet 311, a second inlet 312, a first outlet 313 and a second outlet 314, the first inlet 311 is used for incoming materials, the second inlet 312 is connected to the solid outlet 212, the first outlet 313 is used to drain water vapor, and the second outlet 314 is connected to the material inlet 11, so that the return material from the gas-solid separation device 2 can be used to dry the incoming material, which not only reduces the water content in the incoming material, improves the quality of the gasified gas, improves the working conditions of subsequent combustion, reduces storage pressure, and reduces energy consumption and cost.

[0058] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0059] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A biomass gasification system, characterized in that: include: A gasifier, the gasifier having a material inlet and a mixing outlet; A gas-solid separation device, the gas-solid separation device having a gas outlet, a solid outlet and a mixing inlet, the mixing inlet being connected to the mixing outlet; A drying device, comprising a box body, wherein the box body has a first inlet, a second inlet, a first outlet and a second outlet, wherein the first inlet is used for incoming materials, the second inlet is connected to the solid outlet, the first outlet is used for draining water vapor, and the second outlet is connected to the material inlet.

2. The biomass gasification system according to claim 1, characterized in that: The box body is provided with a stirring device for stirring the returned material and the incoming material.

3. The biomass gasification system according to claim 1, characterized in that: The box body is provided with a temperature sensor and / or a humidity sensor.

4. The biomass gasification system according to claim 1, characterized in that: A fan is provided at the first outlet for driving water vapor to be discharged from the first outlet.

5. The biomass gasification system according to claim 1, characterized in that: A solenoid valve is provided at the second outlet for controlling the opening and closing of the second outlet.

6. The biomass gasification system according to claim 1, characterized in that: The first outlet is located at the upper end of the box; and / or, the second outlet is located at the lower end of the box; and / or, the first inlet is located at the upper end of the box; And / or, the gas-solid separation device is located above the box body, the solid outlet is provided at the lower end of the gas-solid separation device, and the second inlet is located at the upper end of the box body.

7. The biomass gasification system according to claim 1, characterized in that: The gas-solid separation device comprises a return box and a cyclone separator, wherein the cyclone separator is arranged in the return box, and the gas outlet, the solid outlet and the mixing inlet are arranged on the return box.

8. The biomass gasification system according to claim 7, characterized in that: From top to bottom, the cross section of the lower part of the return box gradually decreases.

9. The biomass gasification system according to claim 1, characterized in that: An air-lock feeder is arranged between the material inlet and the second outlet.

10. A biomass energy system, characterized in that: The invention comprises a biomass gasification system according to any one of claims 1 to 9.

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