A biomass gasification furnace with a return device

Abstract

The utility model relates to the technical field of biomass gasification stove, disclose a kind of return material device for biomass gasification stove, including bottom plate, bottom plate upper surface two sides are respectively fixedly connected with mount and fixed cylinder, the fixed cylinder inner cavity is detachably connected with gasification stove body, the mount upper surface is detachably connected with cyclone, the mount side facing gasification stove body is detachably connected with return material assembly, and return material assembly discharge end and gasification stove body one side bottom end intercommunication connection, the return material assembly includes outer tube, inner tube and screw rod, the outer tube inner cavity is detachably connected with inner tube;The utility model can utilize gas waste heat preheating impurity in the return material process, improve combustion efficiency, reduce energy cost, and scrape off inner and outer tube inner wall material when returning material, avoid the influence of heat conduction by impurity adhesion, improve preheating effect, further shorten impurity combustion start time and reduce energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of biomass gasification furnace technology, specifically a return material device for a biomass gasification furnace. Background Technology

[0002] A biomass gasifier is a device that uses biomass as raw material, such as crop straw, rice husks, sawdust, and other agricultural and forestry waste, as well as industrial organic waste. Under specific thermodynamic conditions, it utilizes gasifying agents such as air, oxygen, and water vapor to transform biomass energy into biomass fuel gas, which is mainly composed of combustible gases. This fuel gas can be used for various applications, including domestic cooking and heating, industrial heating and drying, and power generation.

[0003] Existing biomass gasification furnace return devices typically use cyclone separators to separate impurities from the gas produced by combustion in the gasifier, and then return these separated impurities to the gasifier for secondary combustion. This ensures the environmental friendliness of the entire gasification process and reduces pollutant emissions. However, the temperature of the impurities decreases after separation. When these cooled impurities return to the gasifier, they cannot immediately participate in the combustion reaction. Instead, they need to absorb heat again and be heated to their combustion point before they can burn. This reheating process consumes additional heat, leading to energy waste and reducing the overall energy efficiency of the biomass gasifier. To address this, we propose a biomass gasification furnace return device. Utility Model Content

[0004] The main objective of this invention is to provide a return material device for a biomass gasification furnace, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a return material device for a biomass gasification furnace, comprising a base plate, with a mounting base and a fixing cylinder fixedly connected to both sides of the upper surface of the base plate, the gasification furnace body being detachably connected to the inner cavity of the fixing cylinder, a cyclone separator being detachably connected to the upper surface of the mounting base, a return material assembly being detachably connected to the side of the mounting base facing the gasification furnace body, and the discharge end of the return material assembly communicating with the bottom end of one side of the gasification furnace body, the return material assembly comprising an outer tube, an inner tube, and a spiral rod, the inner tube being detachably connected to the inner cavity of the outer tube. The inner tube is rotatably equipped with a spiral rod. The mounting base is detachably nested with a servo motor on one side relative to the return material assembly, and the power output end of the servo motor is fixedly connected to one end of the spiral rod. The bottom end of the cyclone separator is interconnected with a guide pipe, and the end of the guide pipe is interconnected with the inner tube. The upper end of one side of the gasifier body is interconnected with an outlet pipe, and the end of the outlet pipe is interconnected with the side of the outer tube relative to the servo motor. The upper surface of the outer tube and the side relative to the outlet pipe are interconnected with an inlet pipe, and the outlet end of the inlet pipe is interconnected with the top side of the cyclone separator.

[0006] Preferably, a scraping assembly is fitted to the outer wall of the inner tube, and one side of the scraping assembly is detachably connected to the end of the screw rod.

[0007] Preferably, the scraping assembly includes a connecting scraper, an outer scraper, a connecting sleeve, a connecting rod, and a spring. The connecting scraper is detachably connected to the end of the spiral rod, and the inner sidewall of the connecting scraper is in contact with the surface of the inner tube. The connecting sleeve is detachably connected to the outer sidewall of the connecting scraper. The connecting rod is slidably provided in the inner cavity of the connecting sleeve. The outer scraper is fixedly connected to the outer sidewall of the connecting rod, and the outer scraper is in contact with the inner sidewall of the outer tube. A spring is provided around the surface of the connecting rod, and one side of the spring abuts against the inner sidewall of the outer scraper.

[0008] Preferably, a sealing sleeve is fixedly connected to the inner tube surface of the outer tube cavity, which is located between the feed tube and the air inlet tube.

[0009] Preferably, the top of the gasifier body is connected to a feed pipe, and the top of the feed pipe is detachably covered.

[0010] Preferably, a control panel is provided on one side of the mounting base, and both the servo motor and the cyclone separator are electrically connected to an external power source through the control panel.

[0011] Preferably, the outer wall of the outer tube is provided with a heat insulation sleeve, and the surface of the inner tube is coated with a heat-conducting coating.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model utilizes a return assembly consisting of a cyclone separator, a servo motor, an exhaust pipe, an inlet pipe, an outer pipe, an inner pipe, and a screw rod, working together to allow gas to enter the outer pipe through the exhaust pipe or return to the furnace body. Simultaneously, guided by the outer pipe and the inlet pipe, the gas is introduced into the cyclone separator. The cyclone separator removes large particulate impurities from the gas produced by combustion in the furnace body. These large particulate impurities then enter the inner pipe through the guide pipe. The servo motor drives the screw rod in the inner pipe to rotate, transporting the large particulate impurities back into the gasifier body for combustion. During the return process, the residual heat from the combustion gas in the furnace body heats the inner pipe, preheating the large particulate impurities. This allows the large particulate impurities to quickly re-burn upon re-entering the gasifier body, significantly shortening the time it takes to reach combustion within the furnace, further improving combustion efficiency, and effectively reducing energy costs.

[0013] 2. This utility model utilizes a scraping assembly consisting of a servo motor, a screw rod, a connecting scraper, an outer scraper, a connecting sleeve, a connecting rod, and a spring. During the material return process, as the screw rod rotates, the connected scraper rotates synchronously on the outer wall of the inner tube, scraping off the material adhering to the surface of the inner tube. Under the action of the spring, the outer scraper remains in contact with the inner wall of the outer tube. When the connecting scraper rotates, it drives the outer scraper to rotate around the inner tube through the connecting sleeve, scraping off the material on the inner wall of the outer tube. This effectively prevents large particles of impurities from adhering and affecting heat conduction, effectively improves the residual heat effect on large particles of impurities during the material return process, further shortens the time for large particles to reach the combustion state in the furnace, and effectively reduces energy costs. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure of the return material assembly of this utility model; Figure 3 This is a schematic diagram of the scraping assembly of this utility model.

[0015] In the diagram: 1. Base plate; 2. Mounting base; 3. Servo motor; 4. Cyclone separator; 5. Fixed cylinder; 6. Gasifier body; 7. Feed pipe; 8. Gas outlet pipe; 9. Return material assembly; 10. Air inlet pipe; 11. Sealing sleeve; 12. Guide pipe; 13. Scraper assembly; 901. Outer pipe; 902. Inner pipe; 903. Spiral rod; 131. Connecting scraper; 132. Outer scraper; 133. Connecting sleeve; 134. Connecting rod; 135. Spring. Detailed Implementation

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

[0017] Example Please see Figure 1 - Figure 3 The figure shows a return material device for a biomass gasification furnace, including a base plate 1. A mounting base 2 and a fixing cylinder 5 are fixedly connected to both sides of the upper surface of the base plate 1. A gasification furnace body 6 is detachably connected to the inner cavity of the fixing cylinder 5. A cyclone separator 4 is detachably connected to the upper surface of the mounting base 2. A return material assembly 9 is detachably connected to the side of the mounting base 2 facing the gasification furnace body 6, and the discharge end of the return material assembly 9 is interconnected with the bottom end of one side of the gasification furnace body 6. The return material assembly 9 includes an outer tube 901, an inner tube 902, and a screw rod 903. The inner tube 902 is detachably connected to the inner cavity of the outer tube 901, and the screw rod 903 is rotatably mounted inside the inner cavity of the inner tube 902. A servo motor 3 is detachably nested on the side of the mounting base 2 opposite to the return material assembly 9, and the power output end of the servo motor 3 is connected to the screw rod 903. The gasifier 4 is fixedly connected to the bottom of the cyclone separator 4, and the bottom end of the guide pipe 12 is connected to the inner pipe 902. The upper end of one side of the gasifier body 6 is connected to the outlet pipe 8, and the end of the outlet pipe 8 is connected to the side of the outer pipe 901 opposite to the servo motor 3. The upper surface of the outer pipe 901 and the side opposite to the outlet pipe 8 are connected to the inlet pipe 10, and the outlet end of the inlet pipe 10 is connected to the top side of the cyclone separator 4. Driven by the servo motor 3, the gas containing impurities generated by the gasifier body 6 can be introduced into the cyclone separator 4 through the outlet pipe 8 and the inlet pipe 10 for separation. The large particles of impurities after separation enter the inner pipe 902 through the guide pipe 12 and are sent back to the gasifier body 6 for combustion, realizing the recycling of materials and effectively improving energy utilization and gasification efficiency.

[0018] The inner tube 902 has a scraping assembly 13 fitted to its outer wall, and one side of the scraping assembly 13 is detachably connected to the end of the spiral rod 903. The scraping assembly 13 includes a connecting scraper 131, an outer scraper 132, a connecting sleeve 133, a connecting rod 134, and a spring 135. The connecting scraper 131 is detachably connected to the end of the spiral rod 903, and the inner wall of the connecting scraper 131 is fitted to the surface of the inner tube 902. The connecting sleeve 133 is detachably connected to the outer wall of the connecting scraper 131. The connecting rod 134 is slidably mounted inside the connecting sleeve 133, and the outer scraper 132 is fixedly connected to the outer wall of the connecting rod 134. The outer scraper 132 is attached to the inner wall of the outer tube 901, and a spring 135 is provided around the surface of the connecting rod 134, with one side of the spring 135 abutting against the inner side of the outer scraper 132. By means of a detachable connection with the end of the spiral rod 903, when the spiral rod 903 rotates, the connecting scraper 131 can scrape off the material attached to the surface of the inner tube 902. At the same time, under the action of the spring 135, the outer scraper 132 is always attached to the inner wall of the outer tube 901, and scrapes off the material on the inner wall of the outer tube 901 as the connecting scraper 131 rotates. This effectively avoids the material adhesion affecting heat conduction and equipment operation, improves the waste heat utilization effect and the overall stability and service life of the device.

[0019] The inner tube 902, located between the feed pipe 12 and the air inlet pipe 10, is fixedly connected to a sealing sleeve 11. The top of the gasifier body 6 is interconnected with a feed pipe 7, and the top of the feed pipe 7 is detachably covered. The sealing sleeve 11, fixedly connected to the inner tube 902 between the feed pipe 12 and the air inlet pipe 10, effectively prevents gas and material leakage, ensuring the sealing and stability of the return process. The feed pipe 7 with a detachable cover at the top of the gasifier body 6 facilitates the addition of biomass raw materials into the furnace and can also seal the furnace body after feeding, maintaining the stability of the combustion environment inside the furnace and improving gasification efficiency.

[0020] The mounting base 2 is equipped with a control panel on one side, and both the servo motor 3 and the cyclone separator 4 are electrically connected to an external power source through the control panel. The outer wall of the outer tube 901 is provided with a heat insulation sleeve, and the surface of the inner tube 902 is coated with a thermally conductive coating. The control panel facilitates the adjustment of the servo motor 3 and the cyclone separator 4, improving operational convenience and stability. The heat insulation sleeve of the outer tube 901 reduces heat loss and improves energy utilization. The thermally conductive coating of the inner tube 902 enhances heat conduction, efficiently preheats impurities, shortens combustion start-up time, and reduces energy consumption.

[0021] It should be noted that this utility model is a return material device for a biomass gasifier. The gas containing large particulate impurities generated by the gasifier enters the outer pipe 901 from the gas outlet pipe 8. Part of the gas is introduced into the cyclone separator 4 through the outer pipe 901 and the gas inlet pipe 10. The cyclone separator 4 separates the large particulate impurities and allows them to enter the inner pipe 902 along the feed pipe 12. The servo motor 3 is started to drive the spiral rod 903 in the inner pipe 902 to rotate, transporting the large particulate impurities back to the gasifier body 6 for secondary combustion. At the same time, the gas in the outer pipe 901... Waste heat is used to heat the inner tube 902 to preheat large particulate impurities, shortening the time it takes for them to reach combustion state in the furnace, improving combustion efficiency and reducing energy costs. When the screw rod 903 rotates to return material, the connecting scraper 131 connected to it rotates synchronously on the outer wall of the inner tube 902 to scrape the material. The outer scraper 132, under the action of the spring 135, adheres to the inner wall of the outer tube 901 and rotates around the inner tube 902 under the drive of the connecting scraper 131 to scrape the material on the inner wall of the outer tube 901, avoiding the adhesion of impurities that affect heat conduction and improving the preheating effect.

[0022] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0023] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A return material device for a biomass gasification furnace, comprising a base plate (1), characterized in that: The base plate (1) has a mounting base (2) and a fixing cylinder (5) fixedly connected to its upper surface on both sides. The fixing cylinder (5) is detachably connected to the gasifier body (6). The mounting base (2) is detachably connected to the upper surface of the mounting base (2). The side of the mounting base (2) facing the gasifier body (6) is detachably connected to a return material assembly (9), and the discharge end of the return material assembly (9) is interconnected with the bottom end of one side of the gasifier body (6). The return material assembly (9) includes an outer tube (901), an inner tube (902), and a screw rod (903). The inner tube (902) is detachably connected to the inner cavity of the outer tube (901). The screw rod (903) is rotatably provided in the inner cavity of the inner tube (902). A servo motor (3) is detachably nested on one side of the base (2) relative to the return material assembly (9), and the power output end of the servo motor (3) is fixedly connected to one end of the screw rod (903). The bottom end of the cyclone separator (4) is interconnected with a guide pipe (12), and the end of the guide pipe (12) is interconnected with the inner pipe (902). The upper end of one side of the gasifier body (6) is interconnected with an outlet pipe (8), and the end of the outlet pipe (8) is interconnected with the side of the outer pipe (901) relative to the servo motor (3). The upper surface of the outer pipe (901) and the side of the outlet pipe (8) are interconnected with an inlet pipe (10), and the outlet end of the inlet pipe (10) is interconnected with the top side of the cyclone separator (4).

2. The material returning device for a biomass gasifier according to claim 1, characterized in that: The inner tube (902) has a scraper assembly (13) attached to the outer wall, and one side of the scraper assembly (13) is detachably connected to the end of the screw rod (903).

3. The material returning device for a biomass gasifier according to claim 2, wherein: The scraping assembly (13) includes a connecting scraper (131), an outer scraper (132), a connecting sleeve (133), a connecting rod (134), and a spring (135). The end of the spiral rod (903) is detachably connected to the connecting scraper (131), and the inner sidewall of the connecting scraper (131) is attached to the surface of the inner tube (902). The outer sidewall of the connecting scraper (131) is detachably connected to the connecting sleeve (133). The inner cavity of the connecting sleeve (133) is slidably provided with the connecting rod (134). The outer sidewall of the connecting rod (134) is fixedly connected to the outer scraper (132), and the outer scraper (132) is attached to the inner sidewall of the outer tube (901). The surface of the connecting rod (134) is surrounded by the spring (135), and one side of the spring (135) abuts against the inner side of the outer scraper (132).

4. The material returning device for a biomass gasifier according to claim 1, characterized in that: A sealing sleeve (11) is fixedly connected to the surface of the inner tube (902) located between the feed tube (12) and the air inlet tube (10) within the inner cavity of the outer tube (901).

5. The material returning device for a biomass gasifier according to claim 1, wherein: The top of the gasifier body (6) is connected to a feed pipe (7), and the top of the feed pipe (7) is detachably covered.

6. The material returning device for a biomass gasifier according to claim 1, characterized in that: The mounting base (2) is equipped with a control panel on one side, and the servo motor (3) and the cyclone separator (4) are electrically connected to the external power supply through the control panel.

7. The material returning device for a biomass gasifier according to claim 1, characterized in that: The outer tube (901) has a heat insulation sleeve on its outer wall, and the inner tube (902) has a heat-conducting coating on its surface.

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