Agricultural and forestry waste carbonization waste gas purification device

Abstract

The embodiment of the present application provides a waste gas purification device for carbonization of agricultural and forestry waste, which relates to the field of waste gas purification technology. The waste gas purification device for carbonization of agricultural and forestry waste includes a cooling tower arranged opposite to one side of a purification tower. The cooling tower is hollow inside and has an open top. An air inlet pipe is arranged above the interior of the cooling tower, and a U-shaped pipe is connected to the end of the air inlet pipe inside the cooling tower. A rotatable spiral blade 1 is coaxially arranged inside the air inlet pipe. At the same time, the spiral blade 1 contacts the inner ring wall of the air inlet pipe. After the exhaust gas passes through the S-shaped air inlet pipe and the U-shaped pipe, as the spiral blade 1 is driven by the motor 2, the impurities adhered to the inner ring wall of the air inlet pipe and the U-shaped pipe can be pushed and scraped away by the spiral blade 1, and then fall into the collection pipe connected below the outer surface of the U-shaped pipe, and can be collected.

Description

Technical Field

[0001] The invention belongs to the technical field of waste gas purification, and in particular relates to a device for purifying waste gas from carbonization of agricultural and forestry wastes. Background Art

[0002] The high-temperature exhaust gas generated during the carbonization of agricultural and forestry waste (such as straw, sawdust, and fruit shells) is complex in composition, containing impurities such as tar, dust, and ash. To meet the requirements for exhaust gas purification, this exhaust gas must be purified. In conventional purification processes, the high-temperature exhaust gas must first be rapidly cooled in a water-cooled cooling tower before entering subsequent dust removal and decoking units.

[0003] In the existing technology (publication number CN115350541B, patent titled "A Biomass Gasification Furnace Waste Gas Purification Device"), the slag is fully immersed in water. Four levers are then used to move the slag floating on the water surface, exerting downward pressure on the slag, thereby dispersing the slag floating on the water surface and ensuring that the slag floating on the water surface is fully immersed. During the implementation of this technical solution, at least the following problems were discovered in the existing technology.

[0004] The tar components in the high-temperature exhaust gas condense when it gets cold, and after mixing with dust and ash, they adhere to the inner wall of the conveying pipeline in large quantities. The residues continue to accumulate to form a hardened scale layer, which leads to a reduction in the effective flow cross-sectional area of ​​the pipeline and an increase in system resistance. After long-term operation, it causes blockage, forcing the equipment to be shut down for cleaning. Summary of the Invention

[0005] The present application aims to solve at least one of the technical problems in the prior art of being unable to clean impurities from the inner wall of a pipe. To this end, the present application proposes a carbonization waste gas purification device for agricultural and forestry wastes.

[0006] To achieve the above-mentioned purpose, the specific technical scheme of the present invention is as follows: an agricultural and forestry waste carbonization waste gas purification device includes a cooling tower arranged opposite to one side of the purification tower, the cooling tower is hollow inside and has an open top, an air intake pipe is arranged above the inside of the cooling tower, and a U-shaped pipe is connected to the end of the air intake pipe inside the cooling tower, and a rotatable spiral blade is coaxially arranged inside the air intake pipe, and the spiral blade is in contact with the inner ring wall of the air intake pipe.

[0007] Preferably, a rotating shaft 1 is extended from one end of the spiral blade 1 toward the outer surface of the air inlet pipe, and one end of the rotating shaft 1 extends out of the outer surface of the cooling tower, and a motor 2 capable of driving the rotating shaft 1 to rotate is fixed on both sides of the outer surface of the cooling tower.

[0008] Preferably, the interior of the U-shaped tube is also provided with a spiral blade 1, and a collecting pipe connected thereto is downwardly connected at the bend of the U-shaped tube.

[0009] Preferably, a bracket 1 is fixed on both sides of the inner wall of the cooling tower, and a rotatable shaft 2 is provided through the bracket 1, and a blade capable of accelerating the flow of the solution is fixed on the outer circumference of the shaft 2.

[0010] Preferably, a second gear is fixed to the end of the second rotating shaft, and the second gear is meshed with a first crown gear fixed on the outer peripheral surface of the first rotating shaft.

[0011] Preferably, a bracket 2 is fixed on one side above the outer circumference of the U-shaped tube, and a rotatable shaft 3 is provided through the bracket 2. At the same time, a crankshaft extends from one end of the shaft 3 toward the outer circumference of the intake pipe, and a gear 5 is fixed to the other end of the shaft 3.

[0012] Preferably, a crown gear 2 is fixed above the outer circumference of the second rotating shaft, the crown gear 2 is meshed with the gear 5, and the crankshaft is located between the intake pipe and the U-shaped pipe.

[0013] Preferably, a gear three is fixed to the outer peripheral surface of the rotating shaft three close to the side of the bracket two, and a gear four is meshed and connected below the gear three.

[0014] Preferably, the rotating shaft on one side of the outer surface of the gear four extends to the bracket two so that the gear four can support the rotation, and an eccentric block is fixed on the outer surface of the gear four.

[0015] Preferably, a butt joint is connected to one side of the outer surface of the purification tower, one end of the butt joint is communicated with the interior of the purification tower, and the end of the U-shaped tube is communicated with the butt joint.

[0016] The agricultural and forestry waste carbonization waste gas purification device of the present invention has the following advantages:

[0017] 1. The carbonization waste gas purification device for agricultural and forestry waste, when air is taken in inside the air intake pipe and the U-shaped pipe, the motor 2 is running to drive the rotary blade 1. After the rotary blade 1 is running, the inner wall of the pipe can be cleaned, and when the rotating shaft 1 rotates, the rotating shaft 1 enables the gear 2 to rotate through the crown gear 1. Therefore, after the gear 2 rotates, the rotating shaft 2 can rotate, and then the solution is mixed through the blades to prevent the local solution from being too high and affecting the cooling of the waste gas.

[0018] 2. In this agricultural and forestry waste carbonization waste gas purification device, when the blades on both sides of the cooling tower rotate, the rotating shaft 2 on one side can rotate the crown gear 2. After the crown gear 2 rotates, it drives the meshing gear 5 below. As the rotating shaft 3 rotates, the crankshaft can further mix and stir the solution in the area between the intake pipe and the U-shaped pipe to prevent high temperature of the solution in the local pipeline.

[0019] 3. In the carbonization waste gas purification device for agricultural and forestry waste, when the rotating shaft 3 drives the gear 3 to rotate, the gear 3 can drive the meshing gear 4 below to accelerate the rotation, and then the gear 4 can generate vibration, and the vibration is transmitted to the intake pipe and the U-shaped tube, further assisting the rotary blade 1 to remove impurities from the inner ring wall of the intake pipe and the U-shaped tube.

[0020] 4. In the carbonization waste gas purification device for agricultural and forestry waste, when the impurities inside the collection pipe need to be cleaned regularly, the cylinder is operated to move the pull rod downward, and then the pull rod drives the crown gear three to open the collection pipe opening, so that the impurities can fall from the collection pipe. As the pull rod moves downward, the sealing ring can be blocked by the blocking block to prevent the exhaust gas from being discharged from the collection pipe. When the air flow passing through the inside of the U-shaped tube blows the impeller, the impeller can drive the spiral blade two on the outer peripheral surface of the pull rod to allow the impurities inside the collection pipe to fall. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the front view structure of the cooling tower of the present invention;

[0024] Figure 3 This is a schematic diagram of the explosion structure of the air intake pipe and the cooling tower of the present invention;

[0025] Figure 4 This is a schematic diagram of the cooling tower structure from a top view of the present invention;

[0026] Figure 5 For the present invention Figure 4 Schematic diagram of the AA section structure;

[0027] Figure 6 Schematic diagram of the air intake pipe and U-shaped pipe structure of the present invention;

[0028] Figure 7 This is a structural schematic diagram of a spiral blade according to the present invention;

[0029] Figure 8 For the present invention Figure 6 A in the middle is an enlarged structural diagram;

[0030] Figure 9 This is a schematic diagram of the structure of the air intake pipe from a top view according to the present invention;

[0031] Figure 10 For the present invention Figure 9 Schematic diagram of the BB cross-section structure;

[0032] Figure 11 For the present invention Figure 10 Enlarged structural diagram at point B in the middle.

[0033] Explanation of the marks in the figure: 1. Purification tower; 11. Docking pipe; 2. Air inlet pipe; 21. Collecting pipe; 211. Guide block; 212. Sealing ring; 22. U-shaped tube; 221. Bracket 2; 222. Rotating shaft 3; 223. Gear 5; 224. Crankshaft; 225. Gear 3; 226. Gear 4; 227. Eccentric block; 3. Cooling tower; 31. Cooling circulation pipe; 32. Sealing cover; 33. Bracket 1; 34. Rotating shaft 2; 341. Blade; 342. Gear 2; 343. Crown gear 2; 4. Fixing table; 41. Motor 1; 42. Gear 1; 43. Cylinder; 431. Telescopic rod; 5. Motor 2; 51. Rotating shaft 1; 511. Crown gear 1; 52. Spiral blade 1; 6. Pull rod; 61. Spiral blade 2; 62. Impeller; 63. Block; 64. Crown gear 3. DETAILED DESCRIPTION

[0034] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] like Figure 1-Figure 2 As shown, the agricultural and forestry waste carbonization exhaust gas purification device of the present invention includes a purification tower 1 capable of purifying exhaust gas, and a butt joint 11 is connected to one side of the outer surface of the purification tower 1, one end of which is in communication with the interior of the purification tower 1. The exhaust gas can enter the interior of the purification tower 1 through the butt joint 11.

[0036] A cooling tower 3 is also provided on one side of the outer surface of the purification tower 1. Specifically, the cooling tower 3 is used to cool the high-temperature exhaust gas so that the exhaust gas can be treated accordingly in the subsequent purification tower 1. The interior of the cooling tower 3 is a hollow structure, and the top of the cooling tower 3 is open. Cooling circulation pipes 31 are evenly arranged at the opening of the cooling tower 3. The cooling circulation pipes 31 are used to put cooling water into the interior of the cooling tower 3. A pipeline for circulating drainage is also connected to the lower part of the outer surface of the cooling tower 3. Through this pipeline, the solution inside the cooling tower 3 can be circulated and discharged. At the same time, a sealing cover 32 is also covered on the top of the cooling tower 3.

[0037] An intake pipe 2 is located above the cooling tower 3, below the cooling circulation pipe 31. A U-shaped pipe 22 is connected to the end of the intake pipe 2 within the cooling tower 3. The intake pipe 2 and the U-shaped pipe 22 form an S-shaped structure. This connection extends the cooling pipe length, improving the exhaust gas cooling effect. The end of the U-shaped pipe 22 communicates with the butt joint 11, allowing the cooled exhaust gas to enter the purification tower 1.

[0038] like Figure 3-Figure 5 As shown, a rotatable spiral blade 52 is coaxially provided inside the intake pipe 2, and the spiral blade 52 is in contact with the inner ring wall of the intake pipe 2. As the exhaust gas enters the interior of the intake pipe 2, some impurities generated in the exhaust gas will adhere to the inner ring wall of the pipe. As the solution continuously cools the intake pipe 2, the impurities will condense on the surface, thereby affecting the passage of the exhaust gas. At the same time, a rotating shaft 51 extends from one end of the spiral blade 52 to one side of the outer surface of the air intake pipe 2, and one end of the rotating shaft 51 extends out of the outer surface of the cooling tower 3, and a motor 25 that can drive the rotating shaft 51 to rotate is fixed on both sides of the outer surface of the cooling tower 3, and a spiral blade 52 is also provided inside the U-shaped tube 22, and a collecting pipe 21 connected to it is downwardly connected at the bend of the U-shaped tube 22. Therefore, after the exhaust gas passes through the S-shaped air intake pipe 2 and the U-shaped tube 22, as the spiral blade 52 is driven by the motor 25, the impurities adhered to the inner ring wall of the air intake pipe 2 and the U-shaped tube 22 can be pushed and scraped away by the spiral blade 52, and then can fall into the collecting tube 21 connected below the outer surface of the U-shaped tube 22, and can then be collected.

[0039] like Figure 3-Figure 7 As shown, brackets 1 33 are fixed on both sides of the inner wall of the cooling tower 3, and a rotatable shaft 2 34 is provided through the bracket 1 33. Paddles 341 that can accelerate the flow of the solution are fixed on the outer circumference of the shaft 2 34. When the paddles 341 on both sides of the cooling tower 3 are rotated respectively, an annular flow rate mixing can be formed for the solution.

[0040] A second gear 342 is also fixed to the end of the second rotating shaft 34, and the second gear 342 is meshed with the crown gear 1 511 fixed on the outer peripheral surface of the first rotating shaft 51. Therefore, when air is taken in into the intake pipe 2 and the U-shaped tube 22, the second motor 5 is running to drive the spiral blade 1 52. After the spiral blade 1 52 is running, the inner wall of the pipe can be cleaned. When the first rotating shaft 51 rotates, the first rotating shaft 51 enables the second gear 342 to rotate through the crown gear 1 511. Therefore, after the gear 2 342 rotates, the second rotating shaft 34 can be rotated, and then the solution is mixed through the blade 341 to prevent the local solution from being overheated and affecting the cooling of the exhaust gas.

[0041] like Figure 6-Figure 8As shown, a bracket 221 is fixed on one side above the outer circumference of the U-shaped tube 22, and a rotatable shaft 3 222 is provided through the bracket 221. At the same time, a crankshaft 224 extends from one end of the shaft 3 222 toward the outer circumference of the intake pipe 2, and a gear 5 223 is fixed to the other end of the shaft 3 222.

[0042] A second crown gear 343 is fixed to the outer circumference of the second rotating shaft 34, meshing with the fifth gear 223. Furthermore, the crankshaft 224 is located between the intake pipe 2 and the U-shaped tube 22. Therefore, when the paddles 341 on either side of the cooling tower 3 rotate, the second rotating shaft 34 on one side causes the second crown gear 343 to rotate. This rotation drives the meshing gear 5 223 below. As the third rotating shaft 222 rotates, the crankshaft 224 further mixes and stirs the solution in the area between the intake pipe 2 and the U-shaped tube 22, preventing high temperatures in the localized pipe.

[0043] A gear 3 225 is fixed to the outer circumference of the rotating shaft 3 222 near the side of the second bracket 221. A gear 4 226 is meshedly connected below the gear 3 225. The rotating shaft on the outer surface of the gear 4 226 extends to the second bracket 221, enabling the gear 4 226 to rotate. An eccentric weight 227 is also fixed to the outer surface of the gear 4 226. Therefore, when the rotating shaft 3 222 drives the gear 3 225 to rotate, the gear 3 225 drives the meshed gear 4 226 below to accelerate its rotation. This vibration then generates vibration in the gear 4 226, which is transmitted to the intake pipe 2 and the U-shaped tube 22, further assisting the spiral blade 1 52 in removing impurities from the inner annular walls of the intake pipe 2 and the U-shaped tube 22.

[0044] like Figures 9-11 As shown, a sealing ring 212 is fixed above the inner ring wall of the collecting pipe 21, and a fixing platform 4 is relatively arranged below the cooling tower 3. At the same time, the fixing platform 4 is placed on the ground, and a cylinder 43 is fixed on one side of the outer surface of the fixing platform 4. A telescopic rod 431 capable of telescopic displacement is provided at the output end of the cylinder 43, and a rotatable pull rod 6 is connected to the top of the telescopic rod 431.

[0045] In addition, a crown gear three 64 is fixed below the outer circumferential surface of the pull rod 6. The diameter of the crown gear three 64 is larger than the collection tube 21. The bottom opening of the collection tube 21 can be sealed by the crown gear three 64. A guide block 211 is fixed to the inner ring wall of the opening of the collection tube 21, and impurities can be dropped to one side by the guide block 211.

[0046] A rotatable block 63 is sleeved on the outer circumference of the tie rod 6. The block 63 is relatively arranged above the sealing ring 212, and an impeller 62 that can be blown by the airflow is fixed to the top of the outer circumference of the tie rod 6. A spiral blade 2 61 is fixed to the outer circumference of the tie rod 6. Therefore, when the impurities inside the collection pipe 21 need to be cleaned regularly, the cylinder 43 is operated to move the tie rod 6 downward, and then the tie rod 6 drives the crown gear 3 64 to open the opening of the collection pipe 21, so that the impurities can fall from the collection pipe 21. As the tie rod 6 moves downward, the sealing ring 212 can be blocked by the block 63 to prevent the exhaust gas from being discharged from the collection pipe 21. When the airflow passing through the inside of the U-shaped tube 22 blows the impeller 62, the impeller 62 can drive the spiral blade 2 61 on the outer circumference of the tie rod 6, so that the impurities inside the collection pipe 21 can fall.

[0047] Furthermore, motor 1 41 is fixed above the fixing platform 4, and gear 1 42 is fixed to the output end of motor 1 41. Therefore, when the airflow inside the U-shaped tube 22 is insufficient to drive the impeller 62, the pull rod 6 pulls crown gear 3 64 downward, causing it to mesh with gear 1 42. Therefore, when motor 1 41 drives gear 1 42 to rotate, gear 1 42 causes crown gear 3 64 to rotate, and impurities are subsequently removed by spiral blade 2 61.

[0048] Working principle of agricultural and forestry waste carbonization waste gas purification device:

[0049] When air is being taken in through the intake pipe 2 and the U-shaped pipe 22, the motor 2 5 is running to drive the spiral blade 1 52. After the spiral blade 1 52 is running, the inner wall of the pipe can be cleaned. When the rotating shaft 1 51 rotates, the rotating shaft 1 51 enables the gear 2 342 to rotate through the crown gear 1 511. Therefore, after the gear 2 342 rotates, the rotating shaft 2 34 rotates. Subsequently, the paddle 341 mixes the solution to prevent local high temperature of the solution from affecting the cooling of the exhaust gas.

[0050] When the blades 341 on both sides of the cooling tower 3 rotate, the second rotating shaft 34 on one side can rotate the second crown gear 343. After the second crown gear 343 rotates, it drives the meshing gear 5 223 below. As the third rotating shaft 222 rotates, the crankshaft 224 further mixes and stirs the solution in the area between the intake pipe 2 and the U-shaped pipe 22, thereby preventing the solution in the local pipe from overheating.

[0051] When the rotating shaft 3 222 drives the gear 3 225 to rotate, the gear 3 225 can drive the meshing gear 4 226 below to accelerate the rotation, and then the gear 4 226 can generate vibration, and the vibration is transmitted to the intake pipe 2 and the U-shaped tube 22, further assisting the spiral blade 1 52 to remove impurities from the inner ring wall of the intake pipe 2 and the U-shaped tube 22;

[0052] When the impurities inside the collecting pipe 21 need to be cleaned regularly, the cylinder 43 is operated to move the pull rod 6 downward, and then the pull rod 6 drives the crown gear three 64 to open the opening of the collecting pipe 21, so that the impurities can fall from the collecting pipe 21. As the pull rod 6 moves downward, the sealing ring 212 can be blocked by the blocking block 63 to prevent the exhaust gas from being discharged from the collecting pipe 21. When the air flow passing through the inside of the U-shaped tube 22 blows the impeller 62, the impeller 62 can drive the spiral blade two 61 on the outer peripheral surface of the pull rod 6 to allow the impurities inside the collecting pipe 21 to fall.

[0053] It should be noted that the specific models and specifications of the motor 41 and the cylinder 43 need to be selected and determined according to the actual specifications of the device, and the specific selection calculation method adopts the existing technology in this field, so it will not be repeated in detail.

[0054] The power supply and principle of the motor 41 and the cylinder 43 are clear to those skilled in the art and will not be described in detail here.

[0055] It will be understood that the present invention is described by way of some embodiments, and it will be appreciated by those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are intended to be protected by the present invention.

Claims

1. A device for purifying waste gas from carbonization of agricultural and forestry wastes, comprising a cooling tower (3) disposed opposite to a purification tower (1), characterized in that: The cooling tower (3) is hollow inside and has an open top. An air inlet pipe (2) is provided above the cooling tower (3). The end of the air inlet pipe (2) inside the cooling tower (3) is connected with a U-shaped pipe (22). A rotatable spiral blade (52) is provided coaxially inside the air inlet pipe (2). The spiral blade (52) contacts the inner ring wall of the air inlet pipe (2). One end of the spiral blade (52) extends to one side of the outer surface of the air inlet pipe (2) with a rotating shaft (51), and one end of the rotating shaft (51) extends out of the cooling tower (3). ) on the outer surface of the cooling tower (3), and motors 2 (5) capable of driving the rotating shaft 1 (51) to rotate are fixed on both sides of the outer surface of the cooling tower (3), and spiral blades 1 (52) are also provided inside the U-shaped tube (22). A collecting tube (21) connected to the U-shaped tube (22) is connected downward at the bend of the U-shaped tube (22). Brackets 1 (33) are fixed on both sides of the inner wall of the cooling tower (3), and a rotating shaft 2 (34) capable of rotating is provided through the bracket 1 (33), and a paddle (341) capable of accelerating the flow of the solution is fixed on the outer peripheral surface of the rotating shaft 2 (34).

2. The agricultural and forestry waste carbonization waste gas purification device according to claim 1, characterized in that: A second gear (342) is also fixed to the end of the second rotating shaft (34), and the second gear (342) is meshed with the first crown gear (511) fixed on the outer peripheral surface of the first rotating shaft (51).

3. The agricultural and forestry waste carbonization waste gas purification device according to claim 2, characterized in that: A bracket 2 (221) is fixed on one side above the outer peripheral surface of the U-shaped tube (22), and a rotatable rotating shaft 3 (222) is provided through the bracket 2 (221). At the same time, a crankshaft (224) extends from one end of the rotating shaft 3 (222) toward the outer peripheral surface of the intake pipe (2), and a gear 5 (223) is fixed to the other end of the rotating shaft 3 (222).

4. The agricultural and forestry waste carbonization waste gas purification device according to claim 3 is characterized by: A crown gear 2 (343) is fixed above the outer peripheral surface of the second rotating shaft (34), and the crown gear 2 (343) is meshed with the fifth gear (223), and the crankshaft (224) is located between the intake pipe (2) and the U-shaped pipe (22).

5. The device for purifying waste gas from carbonization of agricultural and forestry waste according to claim 4, characterized in that: A gear three (225) is fixed to the outer peripheral surface of the rotating shaft three (222) near the side of the bracket two (221), and a gear four (226) is meshed and connected below the gear three (225).

6. The device for purifying waste gas from carbonization of agricultural and forestry waste according to claim 5, characterized in that: The rotating shaft on one side of the outer surface of the gear four (226) extends to the bracket two (221) so that the gear four (226) can support the rotation, and an eccentric block (227) is fixed on the outer surface of the gear four (226).

7. The device for purifying waste gas from carbonization of agricultural and forestry waste according to claim 6, characterized in that: A butt joint (11) is connected to one side of the outer surface of the purification tower (1), one end of the butt joint (11) is in communication with the interior of the purification tower (1), and the end of the U-shaped tube (22) is in communication with the butt joint (11).

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