A dust and coke removal integrated biomass gasification furnace

Abstract

The utility model discloses a dust removal and decoking integrated biomass gasification furnace relates to dust removal and decoking gasification furnace technical field, the utility model discloses a lower suction type gasification furnace, the top of lower suction type gasification furnace is provided with the feed inlet, the bottom fixedly connected with ash bin of lower suction type gasification furnace, the bottom of ash bin is provided with carbon spiral machine, the utility model discloses a plurality of ball bearings that set up in recess effectively solved the problem of equipment wear and tear and high energy consumption that the big frictional resistance of spiral conveying process causes. The sliding friction between the spiral piece and the body wall is converted to rolling friction by the multiple ball bearings arranged in the recess, and the vibration and impact are absorbed by the rubber pad on the spiral piece, which significantly reduces the running resistance, equipment wear and tear and noise, prolongs the service life of the carbon spiral machine, and improves the running stability and energy efficiency. The utility model discloses a resistance reducing device effectively solves the problem of equipment wear and tear and high energy consumption that the big frictional resistance of spiral conveying process causes.

Description

Technical Field

[0001] This utility model belongs to the technical field of dust removal and coke removal gasification furnaces, and in particular relates to an integrated dust removal and coke removal biomass gasification furnace. Background Technology

[0002] A dust-removing and coke-removing gasifier is a piece of equipment used in industries such as coal gasification and petrochemicals. Its main purpose is to remove smoke and coke during the gasification process, ensuring gas purity and preventing coke from contaminating or damaging subsequent equipment. It combines dust removal and coke removal functions and is an important component for improving gasifier efficiency, protecting equipment, and reducing environmental pollution.

[0003] According to a public announcement (Announcement No.: CN110423634B), an integrated dust and char removal biomass gasification furnace includes a furnace body. A grate is fixed to the lower part of the inner side wall of the furnace body. The upper and lower parts of the grate are respectively a pyrolysis chamber and a slag chamber. An ash discharge port is provided on the side wall of the furnace body corresponding to the slag chamber. An air inlet pipe is connected to the side wall of the pyrolysis chamber. A feed pipe is connected to the upper part of the side wall of the furnace body. A primary purification and filtration mechanism is installed inside the furnace body. A drive mechanism is installed at the top of the outer side of the furnace body and connected to the primary purification and filtration mechanism. A secondary purification and filtration mechanism is installed on the outer side of the furnace body, and its bottom is connected to the pyrolysis chamber. This integrated dust and char removal biomass gasification furnace utilizes the primary and secondary purification and filtration mechanisms to remove char and dust from the gas, thereby improving the char and dust removal effect of the gas, reducing tar production and smoke emission, and thus improving the biomass pyrolysis efficiency.

[0004] In the aforementioned patent, the coking and dust removal effect of the gas is improved by the cooperation of components such as the furnace body and the air inlet pipe, thereby reducing the output of tar and the amount of smoke and dust discharged, and thus improving the biomass pyrolysis efficiency. However, the aforementioned patent could not better solve the problem of equipment wear and high energy consumption caused by high frictional resistance during the screw conveying process of the carbon discharge screw conveyor. Therefore, we proposed an integrated dust removal and coking removal biomass gasification furnace. Utility Model Content

[0005] The purpose of this invention is to provide an integrated biomass gasification furnace for dust removal and coke removal, which effectively solves the problems of equipment wear and high energy consumption caused by high frictional resistance during screw conveying by a resistance reduction device.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model relates to an integrated dust removal and coke removal biomass gasification furnace, comprising a downdraft gasification furnace. The downdraft gasification furnace has a feed inlet at its top and an ash silo fixedly connected to its bottom. A carbon discharge screw conveyor is installed at the bottom of the ash silo. An exhaust pipe is fixedly connected to the side of the downdraft gasification furnace. A gravity dust collector is installed at one end of the exhaust pipe. A connecting pipe is fixedly connected to the top of the gravity dust collector. A cyclone dust collector is installed at one end of the connecting pipe. A combustion aid is installed at the top of the cyclone dust collector. A bucket elevator is installed on the side of the downdraft gasification furnace. A discharge pipe is installed on the circumferential surface of the carbon discharge screw conveyor, and a resistance reduction device is installed on the inner surface of the carbon discharge screw conveyor.

[0008] The resistance reduction device includes a groove formed on the inner surface of the carbon discharge screw conveyor. Ball bearings are arranged on the inner surface of the groove, and a rubber pad is fixedly connected to the circumferential surface of the screw blades of the carbon discharge screw conveyor. The ball bearings placed in the groove reduce the direct contact between the screw blades and the inner wall of the carbon discharge screw conveyor, thereby reducing frictional resistance. The function of the ball bearings is to convert friction into rolling friction through their rolling motion, reducing static friction and making the rotation of the carbon discharge screw conveyor smoother and more stable. This not only improves power transmission efficiency but also reduces wear, thereby reducing friction between carbon powder / blocks and the inner wall and screw blades of the carbon discharge screw conveyor, and extending the service life of the equipment.

[0009] Furthermore, multiple grooves are provided and arranged in a circumferential array along the inner surface of the carbon output screw conveyor. This array design of multiple grooves optimizes the distribution of frictional force, increases the stability of the device, reduces frictional loss, and extends the service life of the equipment. This design improves the overall operating efficiency of the equipment by rationally distributing the friction area and reducing localized loads.

[0010] Furthermore, the ball bearings are provided in multiple portions and correspond to multiple grooves. This design of multiple ball bearings corresponding to multiple grooves enables the device to operate more efficiently and smoothly, reduces friction loss, enhances the durability of mechanical components, and extends the service life of the device.

[0011] Furthermore, the rubber pad contacts and engages with the circumferential surface of the ball, and the top of the feed inlet is located on the displacement trajectory of the bucket elevator. The contact and engagement between the rubber pad and the ball provides a buffering mechanism. When the ball rolls in the groove, the rubber pad can absorb some of the impact force and vibration, reducing direct impact on mechanical parts. This buffering effect can effectively reduce noise and vibration, and reduce mechanical damage during equipment operation.

[0012] Furthermore, a discharge assist device is provided at the bottom of the discharge pipe. This device includes a slot at the bottom of the discharge pipe. A suction pump is installed on the circumferential surface of the discharge pipe, and a fixing rod is fixedly connected to the circumferential surface of the suction pump. One end of the fixing rod is fixedly connected to the circumferential surface of the carbon discharge screw conveyor. An inclined air slot is provided on the inner side of the discharge pipe. This design, through the cooperation of multiple assist components, improves the overall working efficiency of the discharge pipe, reduces malfunctions and blockages, and ensures system stability.

[0013] Furthermore, multiple inclined air ducts are provided and arranged in a circumferential array along the inner side of the discharge pipe. This design, through the cooperation of multiple inclined air ducts, enables the suction force of the suction pump to make the material flow more efficient and smooth, reducing the risk of friction and blockage, thereby improving the discharge efficiency and stability of the entire system.

[0014] Furthermore, the inclined air duct is a small-diameter suction duct, with the toner diameter larger than the diameter of the inclined air duct. Due to the smaller diameter of the inclined air duct, the airflow velocity increases when passing through it, thereby increasing the airflow speed.

[0015] This utility model has the following beneficial effects:

[0016] 1. This utility model effectively solves the problem of high equipment wear and high energy consumption caused by high frictional resistance during screw conveying by using components such as grooves and ball bearings in combination. The multiple ball bearings set in the grooves convert the sliding friction between the screw blades and the machine wall into rolling friction. Combined with the rubber pads on the screw blades to absorb vibration and impact, it significantly reduces operating resistance, equipment wear and noise, extends the service life of the carbon output screw conveyor, and improves operational stability and energy efficiency.

[0017] 2. This utility model utilizes the combined negative pressure suction generated by the suction pump and the accelerated airflow from the inclined air duct to effectively promote the smooth discharge of toner and prevent blockage and material accumulation. The inclined air duct features a small diameter design, preventing toner from being sucked into the duct but instead propelled by the airflow, ensuring continuous and uniform discharge and improving the system's reliability and discharge efficiency.

[0018] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0021] Figure 2 This is a side view of the structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the drag reduction device of this utility model;

[0023] Figure 4 This is a schematic diagram of the material discharge assist device of this utility model;

[0024] Figure 5 This is a side sectional view of the connecting pipe structure of this utility model;

[0025] Figure 6 For the present utility model Figure 3 A magnified structural diagram of A in the middle;

[0026] Figure 7 For the present utility model Figure 5 A magnified structural diagram of B in the diagram.

[0027] The attached diagram lists the components represented by each number as follows:

[0028] 1. Downdraft gasifier; 2. Feed inlet; 3. Ash hopper; 4. Carbon discharge screw conveyor; 5. Gas outlet pipe; 6. Gravity dust collector; 7. Connecting pipe; 8. Cyclone dust collector; 9. Combustion aid; 10. Bucket elevator; 11. Discharge pipe; 12. Resistance reduction device; 13. Discharge assist device; 121. Groove; 122. Ball bearing; 123. Rubber pad; 131. Slotted opening; 132. Suction pump; 133. Fixing rod; 134. Slanted air duct. Detailed Implementation

[0029] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0030] Please see Figures 1-7As shown, this utility model is an integrated dust removal and coke removal biomass gasification furnace, including a downdraft gasification furnace 1. The top of the downdraft gasification furnace 1 is provided with a feed inlet 2. The bottom of the downdraft gasification furnace 1 is fixedly connected to an ash silo 3. The bottom of the ash silo 3 is provided with a carbon discharge screw conveyor 4. The side of the downdraft gasification furnace 1 is fixedly connected to an exhaust pipe 5. One end of the exhaust pipe 5 is provided with a gravity dust collector 6. The top of the gravity dust collector 6 is fixedly connected to a connecting pipe 7. One end of the connecting pipe 7 is provided with a cyclone dust collector 8. The top of the cyclone dust collector 8 is provided with a combustion aid 9. The side of the downdraft gasification furnace 1 is provided with a bucket elevator 10. The circumferential surface of the carbon discharge screw conveyor 4 is provided with a discharge pipe 11. The inner side of the carbon discharge screw conveyor 4 is provided with a resistance reduction device 12.

[0031] The resistance reduction device 12 includes a groove 121 formed on the inner side of the carbon discharge screw conveyor 4. A ball bearing 122 is disposed on the inner side of the groove 121, and a rubber pad 123 is fixedly connected to the circumferential surface of the spiral blades of the carbon discharge screw conveyor 4. The ball bearing 122 placed in the groove 121 reduces the direct contact between the spiral blades and the inner wall of the carbon discharge screw conveyor 4, thereby reducing frictional resistance. The function of the ball bearing 122 is to convert friction into rolling friction through its rolling motion, reducing static friction and making the rotation of the carbon discharge screw conveyor 4 more stable and smooth. This not only improves power transmission efficiency but also reduces wear, thereby reducing the friction between carbon powder / blocks and the inner wall and spiral blades of the carbon discharge screw conveyor 4, and improving the service life of the equipment.

[0032] Multiple grooves 121 are provided and arranged in a circumferential array along the inner side surface of the carbon discharge screw conveyor 4. The array design of multiple grooves 121 can optimize the friction force distribution, increase the stability of the device, reduce friction loss, and extend the service life of the equipment. This design improves the overall operating efficiency of the equipment by rationally distributing the friction area and reducing local load.

[0033] Multiple balls 122 are provided, each corresponding to a plurality of grooves 121. This design, in which multiple balls 122 correspond to multiple grooves 121, enables the equipment to operate more efficiently and smoothly, reduces frictional loss, enhances the durability of mechanical components, and extends the service life of the equipment.

[0034] The rubber pad 123 contacts and engages with the circumferential surface of the ball 122, and the top of the feed inlet 2 is located on the displacement trajectory of the bucket elevator 10. The contact and engagement between the rubber pad 123 and the ball 122 provides a buffering mechanism. When the ball 122 rolls in the groove 121, the rubber pad 123 can absorb part of the impact force and vibration, reducing the direct impact on mechanical parts. This buffering effect can effectively reduce noise and vibration, and reduce mechanical damage during equipment operation.

[0035] A discharge assist device 13 is provided at the bottom of the discharge pipe 11. The discharge assist device 13 includes a slot 131, which is formed at the bottom of the discharge pipe 11. A suction pump 132 is provided on the circumferential surface of the discharge pipe 11. A fixing rod 133 is fixedly connected to the circumferential surface of the suction pump 132. One end of the fixing rod 133 is fixedly connected to the circumferential surface of the carbon discharge screw conveyor 4. An inclined air groove 134 is formed on the inner side of the discharge pipe 11. This design, through the cooperation of multiple assist components, improves the overall working efficiency of the discharge pipe 11, reduces malfunctions and blockages, and ensures the stability of the system.

[0036] Multiple inclined air ducts 134 are provided and arranged in a circumferential array along the inner side of the discharge pipe 11. This design, through the cooperation of multiple inclined air ducts 134, enables the suction force of the suction pump 132 to make the material flow more efficient and smooth, reducing the risk of friction and blockage, thereby improving the discharge efficiency and stability of the entire system.

[0037] The slanted air duct 134 is a small-diameter air intake duct, and the diameter of the toner is larger than the diameter of the slanted air duct 134. Because the diameter of the slanted air duct 134 is small, the airflow velocity will increase when it passes through the slanted air duct 134, thereby increasing the airflow speed.

[0038] A specific application of this embodiment is as follows: Biomass feedstock is automatically lifted and continuously fed into the feed inlet 2 via a bucket elevator 10, entering the downdraft gasifier 1. The bucket elevator 10 ensures a stable and efficient feeding process, reducing manual intervention. Inside the downdraft gasifier 1, the biomass feedstock undergoes a gasification reaction at high temperature, producing combustible gas, ash, and residual carbon. During gasification, the feedstock moves from top to bottom, and the airflow flows downward, which helps in the initial separation of tar and dust. The ash and residual carbon produced after gasification fall into the ash silo 3 at the bottom under gravity. The ash silo 3 serves as a temporary storage and collection point, preventing ash from directly entering subsequent equipment. The residual carbon and ash in the ash silo 3 are discharged through the carbon discharge screw conveyor 4. The carbon discharge screw conveyor 4 uses a screw conveyor method to transport the residual carbon from the bottom of the ash silo 3 to the discharge pipe 11. During this period, the resistance reduction device 12 plays a crucial role. Multiple balls 122 arranged within the groove 121 convert the sliding friction between the spiral blades and the inner wall of the carbon discharge screw conveyor 4 into rolling friction. Simultaneously, the rubber pads 123 on the circumferential surface of the spiral blades mesh with the balls 122, absorbing vibration and impact, reducing noise and equipment wear, and ensuring smooth operation and reduced energy consumption of the carbon discharge screw conveyor 4. When residual carbon is discharged from the discharge pipe 11 of the carbon discharge screw conveyor 4, the discharge assist device 13 further optimizes the discharge efficiency. The suction pump 132 is fixed to the carbon discharge screw conveyor 4 by a fixing rod 133, generating negative pressure suction. Multiple inclined air channels 134 on the inner side of the discharge pipe 11 are arranged in a circumferential array, accelerating the airflow and helping the carbon powder flow out smoothly, preventing blockage. Because the inclined air channels 134 are designed with a small diameter, and the diameter of the carbon powder is larger than the diameter of the inclined air channels 134, the carbon powder is not sucked into the air channels but is pushed by the airflow, ensuring continuous and uniform discharge. Simultaneously, the combustible gas generated from gasification enters the gravity dust collector 6 through the outlet pipe 5. Inside the gravity dust collector 6, the gas velocity decreases, and large dust particles and tar settle and separate under gravity. The gas then enters the cyclone dust collector 8 through the connecting pipe 7, where small and medium-sized dust particles are further removed under centrifugal force. The purified gas finally enters the combustion aid 9, which can be used for combustion power generation, heating, or other energy utilization, achieving clean energy production.

[0039] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0040] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A biomass gasification furnace integrating dust removal and coke removal, comprising a downdraft gasification furnace (1), characterized in that: The bottom of the gasifier (1) is provided with a feed inlet (2), and the bottom of the gasifier (1) is fixedly connected to an ash silo (3). The bottom of the ash silo (3) is provided with a carbon discharge screw conveyor (4). The side of the gasifier (1) is fixedly connected to an exhaust pipe (5). One end of the exhaust pipe (5) is provided with a gravity dust collector (6). The top of the gravity dust collector (6) is fixedly connected to a connecting pipe (7). One end of the connecting pipe (7) is provided with a cyclone dust collector (8). The top of the cyclone dust collector (8) is provided with a combustion aid (9). The side of the gasifier (1) is provided with a bucket elevator (10). The circumferential surface of the carbon discharge screw conveyor (4) is provided with a discharge pipe (11). The inner side of the carbon discharge screw conveyor (4) is provided with a resistance reduction device (12). The resistance reduction device (12) includes a groove (121) which is formed on the inner side of the carbon discharge screw conveyor (4). A ball bearing (122) is provided on the inner side of the groove (121), and a rubber pad (123) is fixedly connected to the circumferential surface of the screw blade of the carbon discharge screw conveyor (4).

2. The integrated dust removal and coke removal biomass gasification furnace according to claim 1, characterized in that, The grooves (121) are provided in multiple ways and are arranged in a circumferential array along the inner side surface of the carbon output spiral machine (4).

3. The integrated dust removal and coke removal biomass gasification furnace according to claim 2, characterized in that, The ball bearings (122) are provided in multiple portions and correspond to multiple grooves (121).

4. The integrated dust removal and coke removal biomass gasification furnace according to claim 3, characterized in that, The rubber pad (123) contacts and engages with the circumferential surface of the ball (122), and the top of the feed inlet (2) is located on the displacement trajectory of the bucket elevator (10).

5. The integrated dust removal and coke removal biomass gasification furnace according to claim 4, characterized in that, The bottom of the discharge pipe (11) is provided with a discharge assist device (13), which includes a slot (131) and is located on the bottom of the discharge pipe (11). A suction pump (132) is provided on the circumferential surface of the discharge pipe (11), and a fixing rod (133) is fixedly connected to the circumferential surface of the suction pump (132). One end of the fixing rod (133) is fixedly connected to the circumferential surface of the carbon discharge screw conveyor (4). An inclined air groove (134) is provided on the inner side of the discharge pipe (11).

6. The integrated dust removal and coke removal biomass gasification furnace according to claim 5, characterized in that, Multiple inclined air ducts (134) are provided and are arranged in a circumferential array along the inner side of the discharge pipe (11).

7. The integrated dust removal and coke removal biomass gasification furnace according to claim 6, characterized in that, The inclined air duct (134) is a small-diameter air intake duct, and the diameter of the carbon powder is larger than the diameter of the inclined air duct (134).

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