A low-tar and high-calorific-value biomass gasification device

Abstract

The present invention discloses a low-tar and high-calorific-value biomass gasification device in the field of gasification devices, which includes a gasification furnace, a filtering device and a mounting device. A furnace door is hinged on the side wall of the gasification furnace. The top wall of the gasification furnace is communicated and fixedly connected with a feed inlet. The lower part of the outer side wall of the gasification furnace is communicated and fixedly connected with an intake pipe. The upper part of the outer side wall of the gasification furnace is communicated and fixedly connected with an internal circulation pipe. The filtering device is sleeved on the internal circulation pipe and is communicated with the internal circulation pipe. A gas outlet is fixedly connected to the side wall of the gasification furnace, and the gas outlet is communicated with the internal circulation pipe, so as to solve to a certain extent the problems existing in the prior art that when the internal circulation pipe is in use, the dust contained in the internal flue gas will adhere to the catalyst, affecting the use of the catalyst. The catalyst is installed in the internal circulation pipe. After being used for a period of time, the catalytic effect of the catalyst becomes weak, and the replacement of the catalyst is relatively troublesome, which is not conducive to the progress of the work.

Description

Technical Field

[0001] The present invention belongs to the field of gasification devices, and specifically relates to a low-tar and high-calorific-value biomass gasification device. Background Art

[0002] As a high-quality scientific utilization of biomass, biomass gasification has good development prospects. However, due to the high tar content in the raw gas produced by gasifiers and the lack of effective treatment methods, it has become the main obstacle to the application and popularization of this technology. Tar is an inevitable by-product of biomass gasification. It is gaseous at high temperatures and gradually condenses into a liquid as the temperature decreases. However, when the gas temperature is below 200°C, tar is easily condensed into a liquid and combines with water, ash, etc. to block gas pipelines or valves, etc., seriously affecting the long-term stable operation of the gasification device. If it enters the cooking stove in a gaseous state, it is also difficult to achieve complete combustion and is likely to produce particles such as carbon black. Since tar accounts for 5% - 15% of the total energy of the raw gas, if not effectively treated, it will have an obvious adverse impact on the environment and gasification efficiency.

[0003] Currently, low-temperature catalytic cracking is one of the most promising technologies for reducing tar content and is also one of the main development directions for tar purification in the process of biomass gasification. However, in existing industrial applications, catalytic cracking generally requires adding an independent cracking reaction system, which greatly increases equipment investment. Usually, the heat source of the cracking reaction system comes from burning part of the raw gas, which also reduces the gas quality.

[0004] To solve the above problems, Chinese Patent Publication No. CN102517079B discloses a biomass gasification device with in-loop tar catalytic cracking, including a gasifier. An inlet and a raw gas outlet of the gasifier are provided at the upper end of the gasifier, and an ash outlet and an air inlet are provided at the lower end of the gasifier. An in-loop pipe with one end connected to the raw gas outlet of the gasifier and the other end returning to the gasifier is also installed in the gasifier. The raw gas at the outlet of the gasifier returns to the in-loop pipeline, and a catalyst layer of dolomite, nickel-based catalyst or alkali metal compound is placed in the in-loop pipe.

[0005] However, in the actual use of the above solution, when the in-loop pipe is in use, the dust contained in the internal flue gas will adhere to the catalyst, affecting the use of the catalyst. The catalyst is installed in the in-loop pipe. After being used for a period of time, the catalytic effect of the catalyst becomes weak, and the replacement of the catalyst is relatively troublesome, which is not conducive to the progress of work. Therefore, it is necessary to propose a low-tar and high-calorific-value biomass gasification device to solve, to a certain extent, the problems existing in the prior art that when the in-loop pipe is in use, the dust contained in the internal flue gas will adhere to the catalyst, affecting the use of the catalyst, the catalyst is installed in the in-loop pipe, after being used for a period of time, the catalytic effect of the catalyst becomes weak, and the replacement of the catalyst is relatively troublesome, which is not conducive to the progress of work. Summary of the Invention

[0006] The object of the present invention is to provide a low-tar and high-calorific-value biomass gasification device, which to a certain extent solves the problems existing in the prior art that when the internal circulation pipe is in use, the dust contained in the internal flue gas will adhere to the catalyst, affecting the use of the catalyst. The catalyst is installed in the internal circulation pipe. After being used for a period of time, the catalytic effect of the catalyst becomes weak, and the replacement of the catalyst is relatively troublesome, which is not conducive to the progress of the work.

[0007] To achieve the above object, the technical solution of the present invention is as follows: A low-tar and high-calorific-value biomass gasification device, 1. comprising a gasification furnace, a filtering device and a mounting device. A furnace door is hinged on the side wall of the gasification furnace. The top wall of the gasification furnace is communicated and fixedly connected with a feed inlet. The lower part of the outer side wall of the gasification furnace is communicated and fixedly connected with an intake pipe. The upper part of the outer side wall of the gasification furnace is communicated and fixedly connected with an internal circulation pipe. The filtering device is sleeved on the internal circulation pipe and is communicated with the internal circulation pipe. A gas outlet is fixedly connected to the side wall of the gasification furnace, and the gas outlet is communicated with the internal circulation pipe;

[0008] The filtering device includes a fixed block and a rotating rod. The fixed block is fixedly connected with the internal circulation pipe. A first opening is formed in one side wall of the fixed block in the width direction. A collection box is detachably connected in the fixed block. The collection box is communicated with the internal circulation pipe. A controller is fixedly installed in the collection box. A first rotation speed sensor is fixedly connected to the rotating rod. The first rotation speed sensor is electrically connected to the controller. An installation strip is sleeved on the rotating rod. The installation strip is fixedly connected with the rotating rod through a bearing. Both ends of the installation strip are fixedly connected with the inner side wall of the collection box. An impeller is fixedly connected to the bottom end of the rotating rod. A filter screen is fixedly connected to the top end of the rotating rod. The top of the filter screen is rotationally matched with the inner top wall of the collection box. A first bevel gear is coaxially and fixedly connected to the rotating rod between the filter screen and the installation strip. A first transmission shaft is arranged on one side of the first bevel gear. A second rotation speed sensor is fixedly connected to the side wall of the first transmission shaft. The second rotation speed sensor is electrically connected to the controller. One end of the first transmission shaft is fixedly connected with a second bevel gear. The second bevel gear meshes with the first bevel gear. One end of the first transmission shaft away from the second bevel gear penetrates through the side wall of the fixed block and the side wall of the gasification furnace and extends into the gasification furnace. The end of the transmission shaft away from the second bevel gear is fixedly connected with a third bevel gear;

[0009] The mounting device includes a rotating shaft. A turntable is sleeved on the rotating shaft. The turntable is coaxially and fixedly connected with the rotating shaft. A plurality of catalyst boxes are evenly and fixedly connected to the turntable. Second openings are provided on the top and bottom of the catalyst boxes. A catalyst layer is placed in the catalyst boxes. The catalyst boxes can all be communicated with the internal circulation pipe;

[0010] A cylinder is provided below the drive shaft. The cylinder is electrically connected to the controller. One end of the cylinder is fixedly connected to the inner side wall of the gasifier. The other end of the cylinder is provided with a second transmission rod. The side wall of the second transmission rod is fixedly connected to a section of the cylinder away from the inner side wall of the gasifier through a bearing. The top end of the second transmission rod is fixedly connected with a fourth bevel gear. The fourth bevel gear can mesh with the third bevel gear. The bottom end of the second transmission rod is detachably connected to the upper end of the rotating shaft.

[0011] After adopting the above scheme, the following principles and beneficial effects are achieved: When using this device, first push the collection box into the fixed block from the first opening so that the collection box is fixed in the fixed block. Put the raw materials into the gasifier from the feed port. The gasifier heats the raw materials. At the same time, air is introduced into the gasifier through the intake pipe. The flue gas generated in the gasifier enters the collection box through the inner circulation pipe, passes through the filter screen and enters the subsequent inner circulation pipe. At the same time, the flue gas drives the impeller to rotate. The impeller drives the filter screen to rotate through the rotating rod, shaking off the dust staying on the filter plate. After the flue gas enters the catalyst box, the catalyst layer catalyzes the oxygen, removing the tar in the flue gas to a certain extent. Subsequently, the flue gas is discharged outside the device through the second outlet located at the bottom of the catalyst box by the inner circulation pipe. During the movement of this device, the first rotation sensor continuously provides the rotation speed data of the rotating rod to the controller. When the rotation speed of the rotating shaft reaches a certain value, the controller controls the cylinder to contract. The cylinder pushes the second transmission shaft to the right, making the fourth bevel gear mesh with the third bevel gear. At the same time, the bottom end of the second transmission rod is fixed to the top end of the rotating shaft. The third bevel gear drives the second transmission rod to rotate through the fourth bevel gear. The second transmission rod drives the turntable to rotate through the rotating shaft. The second rotation sensor continuously provides the rotation speed data of the first transmission shaft to the controller. When the first transmission shaft rotates a certain angle and the catalyst box just communicates with the inner circulation pipe through the second opening, the controller controls the cylinder to contract, making the second transmission shaft and the fourth bevel gear reset, and the rotating shaft stops rotating, completing the replacement of the filter element. When using this device, through the settings of the rotating shaft, impeller and filter screen, part of the dust can be filtered out when the flue gas passes through the collection box, reducing the dust in the flue gas from adhering to the catalyst block when passing through the catalyst block box and affecting the catalytic effect of the catalyst block. At the same time, because the rotation speed of the first transmission shaft can reflect the usage situation of the catalyst block to a certain extent, this device can receive the rotation speed signal of the rotating rod through the first rotation sensor, and after the rotation speed signal reaches a certain value, replace the catalyst block more timely and conveniently through the design of the second transmission rotating shaft, etc., reducing the operation steps of the operator. This device can solve to a certain extent the problems existing in the prior art that when the inner circulation pipe is used, the internal flue gas contains dust, which will adhere to the catalyst, affecting the use of the catalyst. The catalyst is installed in the inner circulation pipe. After using for a period of time, the catalytic effect of the catalyst becomes weak, and the replacement of the catalyst is relatively troublesome, which is not conducive to the work.

[0012] Furthermore, a cylinder is sleeved on the rotating rod between the mounting bar and the first bevel gear, and the cylinder is coaxially fixedly connected to the rotating rod. A curved groove is opened on the side wall of the cylinder, and a protrusion is provided on one side of the cylinder. One side wall of the protrusion in the width direction is fixedly connected to the inner side wall of the collection box, and the other side wall in the width direction of the protrusion is slidably matched with the cylinder through the groove.

[0013] Beneficial effect: When the smoke drives the rotating rod to rotate through the impeller, the groove limits the protrusion, so that the cylinder moves up and down relative to the collection box, and the cylinder drives the filter net to move up and down through the rotating rod. The rotating rod drives the first transmission shaft to move in the gap through the first bevel gear and the second bevel gear. The dust on the filter net is more easily fallen off the filter net due to inertia, reducing the occurrence of filter net clogging due to dust accumulation.

[0014] Furthermore, a rubber ring is fixedly connected to each of the second openings.

[0015] Beneficial effect: When the catalyst box moves to connect with the inner circulation pipe, the rubber ring can be inserted into the gap between the catalyst box and the wall of the inner circulation pipe through its own elastic deformation, thereby reducing the loss of flue gas from the gap between the catalyst box and the wall of the inner circulation pipe, thereby reducing the subsequent problem of reduced combustible gas output rate.

[0016] Furthermore, a one-way plate is hingedly connected at the connection point between the bottom of the collecting box and the inner circulation pipe.

[0017] Beneficial effect: When smoke enters the collection box, the smoke can push the one-way plate to rotate a certain angle, allowing the smoke to enter the collection box. When the device stops operating, the one-way plate resets under the action of its own hinge force, closing the connection between the bottom of the collection box and the inner circulation pipe, reducing the probability of dust in the collection box falling into the inner circulation pipe under the action of gravity.

[0018] Furthermore, a third opening for observing the internal situation of the collecting box is provided on a side wall of the collecting box away from the gasifier, and a glass is fixedly connected to the third opening.

[0019] Beneficial effect: During the use of the device, the operator can observe the accumulation of dust in the collection box through the third opening, so that the operator can deal with the dust in the collection box more promptly, reducing the impact of excessive dust accumulation in the collection box on the operation of the device. The glass can reduce the probability of smoke flowing out of the third opening without affecting the operator's observation of the situation in the collection box.

[0020] Furthermore, a handle is fixedly connected to the outer wall of the collecting box away from the gasifier.

[0021] Beneficial effect: After the collection box has been used for a certain period of time, the operator can use the hand as a fulcrum to more conveniently pull the collection box out of the fixed block and dump the dust in the collection box.

[0022] Further, the handle is provided with a number of hemispherical protrusions.

[0023] Beneficial effects: When the operator pulls the collection box out of the fixed block through the handle, the protrusions can increase the friction between the operator's hand and the handle, making it more difficult for the operator to let go during operation.

[0024] Further: A lubricating layer is provided on the contact surface between the convex block and the cylinder.

[0025] Beneficial effects: During the use of the device, the lubricating layer effectively reduces the dynamic friction coefficient between the convex block and the cylinder, thereby reducing the friction between the convex block and the cylinder, and further reducing the wear between the convex block and the cylinder. Description of the Drawings

[0026] Figure 1 Is an axonometric view of an embodiment of a low-tar and high-calorific-value biomass gasification device of the present invention;

[0027] Figure 2 Is a sectional view of an embodiment of a low-tar and high-calorific-value biomass gasification device of the present invention;

[0028] Figure 3 Is a sectional view of a filtering device of an embodiment of a low-tar and high-calorific-value biomass gasification device of the present invention;

[0029] Figure 4 Is a front sectional view of an installation device of an embodiment of a low-tar and high-calorific-value biomass gasification device of the present invention;

[0030] Figure 5 Is a top sectional view of an installation device of an embodiment of a low-tar and high-calorific-value biomass gasification device of the present invention;

[0031] Figure 6 Is a circuit schematic diagram of an embodiment of a low-tar and high-calorific-value biomass gasification device of the present invention. Detailed Description of the Invention

[0032] The following is a further detailed description through specific embodiments:

[0033] The reference numerals in the accompanying drawings of the specification include: gasification furnace 1, furnace door 2, feed inlet 3, intake pipe 4, internal circulation pipe 5, filtering device 6, fixed block 61, collection box 62, glass 621, handle 622, installation strip 63, rotating rod 64, first bevel gear 641, second bevel gear 642, first transmission shaft 643, third bevel gear 644, cylinder 645, convex block 646, impeller 65, filter screen 66, one-way plate 67, turntable 7, rotating shaft 71, rubber ring 72, air cylinder 73, fourth bevel gear 74, catalyst layer 75, second transmission shaft 76, catalyst box 77, gas outlet 8.

[0034] Example 1

[0035] The embodiment is basically as shown in the attached Figure 1-6 figure:

[0036] A low-tar and high-calorific-value biomass gasification device includes a gasification furnace 1, a filtering device 6 and a mounting device. A furnace door 2 is hinged on the side wall of the gasification furnace 1. The top wall of the gasification furnace 1 is communicated and welded with a feed inlet 3. The lower part of the outer side wall of the gasification furnace 1 is communicated and welded with an intake pipe 4. The upper part of the outer side wall of the gasification furnace 1 is communicated and welded with an internal circulation pipe 5. The filtering device 6 is sleeved on the internal circulation pipe 5 and communicated with the internal circulation pipe 5. A gas outlet 8 is welded on the side wall of the gasification furnace 1, and the gas outlet 8 is communicated with the internal circulation pipe 5;

[0037] The filtering device 6 includes a fixing block 61 and a rotating rod 64. The fixing block 61 is welded to the internal circulation pipe 5. A first opening is formed on one side wall in the width direction of the fixing block 61. A collecting box 62 is detachably connected to the fixing block 61 through a buckle. A controller is fixedly installed in the collecting box 62 through bolts. The model of the controller is preferably 2080Micro850. A first revolution sensor is fixedly connected to the rotating rod 64 through bolts. The signal of the first sensor is preferably CYT-9100. The first revolution sensor is electrically connected to the controller. An installation strip 63 is sleeved on the rotating rod 64. The installation strip 63 is fixedly connected to the rotating rod 64 through a ball bearing. Both ends of the installation strip 63 are welded to the inner side wall of the collecting box 62. An impeller 65 is welded to the bottom end of the rotating rod 64. A filter net 66 is welded to the top end of the rotating rod 64. The top of the filter net is rotationally matched with the inner top wall of the collecting box. A first bevel gear 641 is coaxially welded to the rotating rod 64 between the filter net 66 and the installation strip 63. A first transmission shaft 643 is arranged on one side of the first bevel gear 641. A second revolution sensor is fixedly connected to the side wall of the first transmission shaft 643 through bolts. The model of the second revolution sensor is preferably CYT-9100. The second revolution sensor is electrically connected to the controller. A second bevel gear 642 is welded to one end of the first transmission shaft 643. The second bevel gear 642 meshes with the first bevel gear 641. One end of the first transmission shaft 643 away from the second bevel gear 642 sequentially penetrates through the side wall of the fixing block 61 and the side wall of the gasification furnace 1 and extends into the gasification furnace 1. A third bevel gear 644 is welded to the end of the transmission shaft away from the second bevel gear 642;

[0038] The mounting device includes a rotating shaft 71. A turntable 7 is sleeved on the rotating shaft 71. The turntable 7 is integrally formed coaxially with the rotating shaft 71. A plurality of catalyst boxes 77 are evenly arranged on the turntable 7. The catalyst boxes 77 are integrally formed with the turntable 7. Second openings are formed on the top and bottom of the catalyst boxes 77. A catalyst layer 75 made of dolomite is placed in the catalyst boxes 77. The catalyst boxes 77 can all be communicated with the internal circulation pipe 5;

[0039] A cylinder 73 is provided below the transmission shaft. The model of the cylinder 73 is preferably SC32-25. The cylinder 73 is electrically connected to the controller. One end of the cylinder 73 is fixedly connected to the inner side wall of the gasifier 1. A second transmission rod is provided at the other end of the cylinder 73. The side wall of the second transmission rod is fixedly connected to a section of the cylinder 73 away from the inner side wall of the gasifier 1 through a ball bearing. A fourth bevel gear 74 is welded to the top end of the second transmission rod. The fourth bevel gear 74 can mesh with the third bevel gear 644. The bottom end of the second transmission rod is detachably connected to the upper end of the rotating shaft 71 through a buckle.

[0040] The specific implementation process is as follows: Using this device, the collection box 62 is pushed into the fixed block 61 from the first opening, so that the collection box 62 is fixed in the fixed block 61. The raw materials are put into the gasifier 1 from the feed inlet 3. The gasifier 1 heats the raw materials. At the same time, air is introduced into the gasifier 1 through the inlet pipe 4. The flue gas generated in the gasifier 1 enters the collection box 62 through the internal circulation pipe 5, passes through the filter screen 66 and enters the subsequent internal circulation pipe 5. At the same time, the flue gas drives the impeller 65 to rotate. The impeller 65 drives the rotating rod 64 to rotate. The rotating rod 64 drives the first bevel gear 641 to rotate. The first bevel gear 641 drives the second bevel gear 642 to rotate. The second bevel gear 642 drives the first transmission shaft 643 to rotate. The first transmission shaft 643 drives the third bevel gear 644 to rotate. At the same time, the rotating rod 64 drives the filter screen 66 to rotate, shaking off the dust staying on the filter screen 66. The flue gas passes through the subsequent internal circulation pipe 5 of the collection box 62 and enters the catalyst box 77 through the second opening at the top of the catalyst box 77. When the flue gas passes through the catalyst layer 75, the catalyst layer 75 catalyzes the flue gas, removing the tar in the flue gas to a certain extent. Subsequently, the flue gas is discharged from the device through the second outlet at the bottom of the catalyst box 77 by the internal circulation pipe 5. During the operation of this device, the first revolution sensor continuously provides the revolution data of the rotating rod 64 to the controller. When the revolution of the rotating rod 64 reaches a certain value, the controller controls the cylinder 73 to contract. The cylinder 73 pushes the second transmission shaft 76 to the right, making the fourth bevel gear 74 engage with the third bevel gear 644. At the same time, the bottom end of the second transmission rod is fixed to the top end of the rotating shaft 71. The third bevel gear 644 drives the fourth bevel gear 74 to rotate. The fourth bevel gear 74 drives the second transmission rod to rotate. The second transmission rod drives the rotating shaft 71 to rotate. The rotating shaft 71 drives the turntable 7 to rotate. The turntable 7 drives the catalyst box 77 to rotate. The second revolution sensor continuously provides the revolution data of the first transmission shaft 643 to the controller. When the first transmission shaft 643 rotates a certain angle and the catalyst box 77 just communicates with the internal circulation pipe 5 through the second opening, the controller controls the cylinder 73 to extend. The cylinder 73 pushes the second transmission shaft 76 to the left. When the fixation between the second transmission shaft 76 and the rotating shaft 71 is released, the fourth bevel gear 74 moves away from the third bevel gear 644, and the second transmission shaft 76 stops rotating, so that the rotating shaft 71 stops rotating, completing the replacement of the filter block. When using this device, through the settings of the rotating shaft 71, the impeller 65 and the filter screen 66, when the flue gas passes through the collection box 62, part of the dust can be filtered out, reducing the dust in the flue gas from adhering to the catalyst block when passing through the catalyst block box and affecting the catalytic effect of the catalyst block. At the same time, because the revolution of the rotating rod 64 can reflect the usage situation of the catalyst block to a certain extent, this device can receive the revolution signal of the rotating rod 64 through the first revolution sensor, and after the revolution signal reaches a certain value, through the design of the second transmission rotating shaft 71, etc., the catalyst block can be replaced more timely and conveniently, reducing the operation steps of the operator.

[0041] Example 2

[0042] The difference from the above embodiment is that a cylinder 645 is sleeved on the rotating rod 64 between the mounting strip 63 and the first bevel gear 641. The cylinder 645 and the rotating rod 64 are integrally formed coaxially. A curved groove is formed on the side wall of the cylinder 645. A convex block 646 is provided on one side of the cylinder 645. One side wall in the width direction of the convex block 646 is welded to the inner side wall of the collection box 62, and the other side wall in the width direction of the convex block 646 is slidably engaged with the cylinder 645 through the groove.

[0043] The specific implementation process is as follows: During the use of this device, when the flue gas causes the rotating rod 64 to rotate through the impeller 65, the cylinder 645 limits the convex block 646 through the groove, converting the rotational motion of the cylinder 645 into the vertical motion of the convex block 646, causing the convex block 646 to move up and down relative to the cylinder 645. At the same time, one end of the convex block 646 away from the cylinder 645 is welded to the inner side wall of the collection box 62, causing the cylinder 645 to move up and down relative to the collection box 62. The cylinder 645 drives the rotating rod 64 to move up and down. When the rotating rod 64 moves downward, the meshing between the first bevel gear 641 and the second bevel gear 642 is released. When the rotating rod 64 moves upward and pushes the first bevel gear 641 upward, when the first bevel gear 641 meshes with the second bevel gear 642, the first bevel gear 641 drives the second bevel gear 642 to rotate. The rotating rod 64 drives the first transmission shaft 643 to move intermittently through the first bevel gear 641 and the second bevel gear 642. The rotating rod 64 drives the filter screen 66 to move up and down. The dust on the filter screen 66 is more likely to fall off the filter screen 66 due to inertia, reducing the situation where the filter screen 66 is blocked due to dust accumulation.

[0044] Example 3

[0045] The difference from the above embodiment is that rubber rings 72 are bonded at the second openings.

[0046] The specific implementation process is as follows: When the catalyst box 77 moves to communicate with the inner circulation pipe 5, the rubber ring 72 can be driven by the catalyst box 77 and stuffed into the gap between the catalyst box 77 and the pipe wall of the inner circulation pipe 5 through its own elastic deformation, reducing the loss of flue gas from the gap between the catalyst box 77 and the pipe wall of the inner circulation pipe 5, and thus avoiding the problem of reduced subsequent combustible gas production rate.

[0047] Example 4

[0048] The difference from the above embodiment is that a one-way plate 67 is hinged at the connection between the bottom of the collection box 62 and the inner circulation pipe 5.

[0049] The specific implementation process is as follows: when the smoke enters the collection box 62, the smoke pressure in the inner circulation pipe 5 is greater than the air in the collection box 62, and the smoke pushes the one-way plate 67 to rotate a certain angle, allowing the smoke to enter the collection box 62. When the device stops operating, the one-way plate 67 is reset under the action of its own hinge force, closing the connection between the bottom of the collection box 62 and the inner circulation pipe 5, reducing the probability of dust in the collection box 62 falling into the inner circulation pipe 5 under the action of gravity.

[0050] Embodiment 5

[0051] The difference from the above embodiment is that a third opening for observing the internal situation of the collecting box 62 is opened on a side wall of the collecting box 62 away from the gasifier 1, and a glass 621 is bonded to the third opening.

[0052] The specific implementation process is as follows: During the use of the device, the operator can observe the accumulation of dust in the collection box 62 through the third opening, so that the operator can take out the collection box 62 more promptly and process the dust in the collection box 62, thereby reducing the occurrence of excessive dust accumulation in the collection box 62 affecting the operation of the device. The glass 621 can reduce the probability of smoke flowing out of the third opening without affecting the operator's observation of the situation in the collection box 62.

[0053] Embodiment 6

[0054] The difference from the above embodiment is that a handle 622 is fixedly connected with bolts on the outer wall of the collecting box 62 away from the gasifier 1 .

[0055] The specific implementation process is as follows: after the collection box 62 has been used for a certain period of time, the operator can use the handle 622 as a fulcrum to pull the collection box 62 outward, so that the collection box 62 can be pulled out of the fixing block 61 more conveniently to dump the dust in the collection box 62.

[0056] Embodiment 7

[0057] The difference from the above embodiment is that the handle 622 is provided with a plurality of hemispherical protrusions.

[0058] The specific implementation process is as follows: when the operator pulls the collection box 62 out of the fixed block 61 through the handle 622, the protrusion can increase the contact area between the handle 622 and the operator's hand, thereby increasing the friction between the operator's hand and the handle 622, making it more difficult for the operator to slip out of the handle during operation.

[0059] Embodiment 8

[0060] The difference from the above-mentioned embodiment is that a lubricating layer made of mineral oil is provided on the contact surface between the protrusion 646 and the cylinder 645 .

[0061] The specific implementation process is as follows: During the use of this device, the lubricating layer effectively reduces the dynamic friction coefficient between the bump 646 and the cylinder 645, thereby reducing the frictional force between the bump 646 and the cylinder 645, and further reducing the wear of the bump 646 and the cylinder 645.

[0062] The above are only the embodiments of the present invention. Common knowledge such as the specific structures and characteristics known in the art are not described in detail here. Those of ordinary skill in the art know all the common general technical knowledge in the technical field to which the invention belongs before the filing date or the priority date, are able to know all the existing technologies in this field, and have the ability to apply the conventional experimental means before this date. Those of ordinary skill in the art can, under the inspiration given in this application, improve and implement this solution in combination with their own abilities. Some typical well-known structures or well-known methods should not become an obstacle for those of ordinary skill in the art to implement this application. It should be noted that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can also be made, and these should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicality of the patent. The protection scope required by this application should be based on the content of its claims, and the specific implementation manners and the like described in the specification can be used to interpret the content of the claims.

Claims

1. A low-tar and high-calorific-value biomass gasification device, characterized in that: It includes a gasifier, a filtering device and a mounting device. A furnace door is hinged on the side wall of the gasifier. The top wall of the gasifier is communicated with and fixedly connected to a feed inlet. The lower part of the outer side wall of the gasifier is communicated with and fixedly connected to an intake pipe. The upper part of the outer side wall of the gasifier is communicated with and fixedly connected to an internal circulation pipe. The filtering device is sleeved on the internal circulation pipe and communicated with the internal circulation pipe. A gas outlet is fixedly connected to the side wall of the gasifier, and the gas outlet is communicated with the internal circulation pipe; The filtering device includes a fixing block and a rotating rod. The fixing block is fixedly connected to the internal circulation pipe. A first opening is formed on one side wall in the width direction of the fixing block. A collection box is detachably connected inside the fixing block. The collection box is communicated with the internal circulation pipe. A controller is fixedly installed in the collection box. A first revolution sensor is fixedly connected to the rotating rod. The first revolution sensor is electrically connected to the controller. An installation strip is sleeved on the rotating rod. The installation strip is fixedly connected to the rotating rod through a bearing. Both ends of the installation strip are fixedly connected to the inner side wall of the collection box. An impeller is fixedly connected to the bottom end of the rotating rod. A filter screen is fixedly connected to the top end of the rotating rod. The top of the filter screen is rotationally matched with the inner top wall of the collection box. A first bevel gear is coaxially and fixedly connected to the rotating rod between the filter screen and the installation strip. A first transmission shaft is arranged on one side of the first bevel gear. A second revolution sensor is fixedly connected to the side wall of the first transmission shaft. The second revolution sensor is electrically connected to the controller. A second bevel gear is fixedly connected to one end of the first transmission shaft. The second bevel gear meshes with the first bevel gear. The end of the first transmission shaft away from the second bevel gear penetrates through the side wall of the fixing block and the side wall of the gasifier and extends into the gasifier. A third bevel gear is fixedly connected to the end of the transmission shaft away from the second bevel gear; The mounting device includes a rotating shaft. A turntable is sleeved on the rotating shaft. The turntable is coaxially and fixedly connected to the rotating shaft. A plurality of catalyst boxes are evenly and fixedly connected to the turntable. Second openings are provided on both the top and bottom of the catalyst boxes. A catalyst layer is placed in the catalyst boxes. The catalyst boxes can all be communicated with the internal circulation pipe; A cylinder is arranged below the transmission shaft. The cylinder is electrically connected to the controller. One end of the cylinder is fixedly connected to the inner side wall of the gasifier. The other end of the cylinder is provided with a second transmission rod. The side wall of the second transmission rod is fixedly connected to a section of the cylinder away from the inner side wall of the gasifier through a bearing. A fourth bevel gear is fixedly connected to the top end of the second transmission rod. The fourth bevel gear can mesh with the third bevel gear. The bottom end of the second transmission rod is detachably connected to the upper end of the rotating shaft.

2. The low-tar and high-calorific-value biomass gasification device according to claim 1, wherein: A cylinder is sleeved on the rotating rod between the installation strip and the first bevel gear. The cylinder is coaxially and fixedly connected to the rotating rod. A curved groove is formed on the side wall of the cylinder. A convex block is arranged on one side of the cylinder. One side wall in the width direction of the convex block is fixedly connected to the inner side wall of the collection box. The other side wall in the width direction of the convex block is slidably matched with the cylinder through the groove.

3. The low-tar and high-calorific-value biomass gasification device according to claim 2, wherein: Rubber rings are fixedly connected to the second openings.

4. The low-tar and high-calorific-value biomass gasification device according to claim 3, characterized in that: A one-way plate is hinged at the connection between the bottom of the collection box and the internal circulation pipe.

5. The low-tar and high-calorific-value biomass gasification device according to claim 4, wherein: A third opening for observing the internal situation of the collection box is formed on the side wall of the collection box away from the gasifier. Glass is fixedly connected to the third opening.

6. The low-tar and high-calorific-value biomass gasification device according to claim 5, wherein: A handle is fixedly connected to the outer side wall of the collection box away from the gasifier.

7. The low-tar and high-calorific-value biomass gasification device according to claim 6, wherein: A number of hemispherical protrusions are provided on the handle.

8. The low-tar and high-calorific-value biomass gasification device according to claim 7, wherein: A lubricating layer is provided on the contact surface between the convex block and the cylinder.

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