A regenerative oxidation heat extraction flue for low-concentration methane

Abstract

This utility model relates to the field of thermal countercurrent regenerative oxidation technology, and discloses a regenerative oxidation heat extraction flue for low-concentration gas. It includes a base, a processing mechanism on the top of the base, an external connecting pipe fixedly connected to the processing mechanism, a filter mechanism on the inner wall of the external connecting pipe, a main shaft fixedly connected inside the filter mechanism, an adjustment mechanism on the outside of the main shaft, and a discharge pipe fixedly connected to the outside of the filter mechanism. The filter mechanism includes a fixed filter screen, which is fixedly connected to the inner wall of the external connecting pipe. In this utility model, gas enters through the external connecting pipe and undergoes double-layer filtration via a fixed filter screen and a rotating filter screen, effectively removing impurities and improving gas purity. The rotating scraper cleans the fixed filter screen, preventing clogging, extending its service life, and improving energy efficiency and safety.

Description

Technical Field

[0001] This utility model relates to the field of thermal countercurrent regenerative oxidation technology, and in particular to a regenerative oxidation heat extraction flue for low-concentration methane. Background Technology

[0002] A regenerative thermal oxidation (RTO) flue for low-concentration methane is a specially designed device for energy recovery systems that treat and utilize low-concentration methane (typically with methane concentrations below 8%). This device uses RTO technology to react methane in low-concentration methane with oxygen to produce carbon dioxide and water, releasing a significant amount of heat. Simultaneously, the flue recovers waste heat from the high-temperature flue gas for use in generating steam, power generation, or heating.

[0003] A typical regenerative oxidation flue for low-concentration methane consists of a processing mechanism, a base, and a conveying mechanism. During operation, the processing mechanism is responsible for the oxidation reaction and heat recovery of the methane, converting methane in the methane into carbon dioxide and water, while simultaneously recovering heat from the high-temperature flue gas through a heat exchanger. The base provides stable support for the entire device, and the conveying mechanism is responsible for introducing low-concentration methane into the device and discharging the treated flue gas.

[0004] However, some existing devices cannot perform multi-stage filtration of impurities in gas. While this design can initially remove larger particulate impurities from the gas, it is less effective at filtering finer particles, resulting in insufficient purity of the gas before it enters the combustion chamber. This not only affects combustion efficiency but also causes blockages or damage to downstream equipment. Therefore, a regenerative oxidation flue for low-concentration gas is proposed to address these issues. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a regenerative oxidation heat extraction flue for low-concentration methane, aiming to improve the problem that some existing devices cannot perform multi-stage filtration.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A heat storage oxidation flue for low-concentration methane includes a base, a processing mechanism on the top of the base, an external pipe fixedly connected to the outside of the processing mechanism, a filter mechanism on the inner wall of the external pipe, a main shaft fixedly connected inside the filter mechanism, an adjustment mechanism on the outside of the main shaft, and a discharge pipe fixedly connected to the outside of the filter mechanism. The filtration mechanism includes a fixed filter screen, the outside of which is fixedly connected to the inner wall of the outer connecting pipe, the outside of which is rotatably connected to the inside of the fixed filter screen, a scraper fixedly connected to the outside of the main shaft (i.e., the side closest to the fixed filter screen), a rotating filter screen fixedly connected to the outside of the main shaft (i.e., the side furthest from the scraper), a toggle ring fixedly connected to the outside of the rotating filter screen, and a rotating assembly fixedly connected to the inside of the toggle ring. As a further description of the above technical solution: The rotating assembly includes a rotating shaft, the inner wall of which is fixedly connected to the outside of the outer pipe, a sealing plate fixedly connected to the outer side of the rotating shaft, a mating groove being formed inside the actuating ring (close to the rotating shaft), and the outside of the sealing plate being fixedly connected to the inside of the mating groove. The outer side of the discharge pipe is fixedly connected to the outside of the actuating ring. As a further description of the above technical solution: The processing mechanism includes a combustion chamber, the bottom of which is fixedly connected to the top of the base, and a connecting pipe is fixedly connected to the outer side of the combustion chamber. As a further description of the above technical solution: A chimney is fixedly connected to the other side of the connecting pipe, and a heat exchanger is fixedly connected to the bottom of the connecting pipe. As a further description of the above technical solution: The external pipe is fixedly connected to the outside of the combustion chamber, and the bottom of the heat exchanger is fixedly connected to the top of the base. As a further description of the above technical solution: The adjusting mechanism includes a rotating ring, which is rotatably connected to the outside of the main shaft, i.e., the side near the discharge pipe. As a further description of the above technical solution: The rotating ring is fixedly connected to two locking plates on the outside, and the main shaft is fixedly connected to two fixing plates on the outside, i.e., the side closest to the discharge pipe. As a further description of the above technical solution: The outer side of the locking plate is located outside the fixing plate, i.e., close to the discharge pipe, and the outer sides of the locking plate and the fixing plate are rotatably connected to the inside of the discharge pipe.

[0007] This utility model has the following beneficial effects: 1. In this utility model, gas enters the device through an external pipe and undergoes double-layer filtration with a fixed filter screen and a rotating filter screen, effectively removing impurities and improving gas purity. The scraper can rotate to clean the fixed filter screen, preventing clogging and extending its service life. The self-cleaning function of the rotating filter screen further improves filtration efficiency, ensuring long-term stable operation of the device, reducing maintenance costs, and improving energy utilization efficiency and safety.

[0008] 2. In this utility model, the relative movement of the locking plate and the fixed plate can flexibly adjust the gas flow area. At the same time, the sealing design of the locking plate ensures the sealing during the gas transportation process and prevents leakage. This design not only improves the adaptability and flexibility of the device, but also ensures the purity of the gas before combustion and the stability of the transportation process. Attached Figure Description

[0009] Figure 1 This is a three-dimensional schematic diagram of a heat storage oxidation flue for low-concentration methane proposed in this utility model. Figure 2 This is a schematic diagram of the actuating ring for a regenerative oxidation heat extraction flue for low-concentration methane proposed in this utility model. Figure 3 This is a schematic diagram of the structure of a retaining plate for a heat storage oxidation and heat extraction flue for low-concentration methane proposed in this utility model. Figure 4 This is a schematic diagram of the rotating ring structure of a regenerative oxidation heat extraction flue for low-concentration methane proposed in this utility model. Figure 5 This is a schematic diagram of the structure of a scraper for a heat storage oxidation flue for low-concentration methane, as proposed in this utility model.

[0010] Legend: 1. Base; 2. Machining mechanism; 21. Combustion chamber; 22. Connecting pipe; 23. Chimney; 24. Heat exchanger; 3. External pipe; 4. Filtering mechanism; 41. Fixed filter screen; 42. Scraper; 43. Rotating filter screen; 44. Rotating assembly; 441. Rotating shaft; 442. Sealing plate; 443. Connecting groove; 45. Actuating ring; 5. Main shaft; 6. Adjusting mechanism; 61. Rotating ring; 62. Clamping plate; 63. Fixing plate; 7. Discharge pipe. Detailed Implementation

[0011] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0012] Reference Figures 1 to 5 This utility model provides an embodiment of a regenerative oxidation heat extraction flue for low-concentration methane, comprising a base 1, a processing mechanism 2 on the top of the base 1, and a combustion chamber 21, which is the site of methane combustion. The bottom of the combustion chamber 21 is fixedly connected to the top of the base 1. A connecting pipe 22 is fixedly connected to one side of the combustion chamber 21, designed to allow the flue gas generated by combustion to be smoothly discharged. A chimney 23 is fixedly connected to the other side of the connecting pipe 22, designed to discharge exhaust gas. The bottom of the connecting pipe 22 is fixedly connected to... A heat exchanger 24 is connected to exchange the heat generated by combustion. The outer pipe 3 is fixedly connected to the outside of the combustion chamber 21. The bottom of the heat exchanger 24 is fixedly connected to the top of the base 1. The processing mechanism 2 is fixedly connected to the outside of the outer pipe 3, which is designed to provide additional connection and conveying capacity. A filter mechanism 4 is provided on the inner wall of the outer pipe 3. A main shaft 5 is fixedly connected inside the filter mechanism 4, which is designed to provide good support capacity. An adjustment mechanism 6 is provided on the outside of the main shaft 5. A discharge pipe 7 is fixedly connected to the outside of the filter mechanism 4. The filtration mechanism 4 includes a fixed filter screen 41, designed to filter the hot gas transported inside the external pipe 3. The fixed filter screen 41 is fixedly connected to the inner wall of the external pipe 3. The main shaft 5 is rotatably connected to the inside of the fixed filter screen 41. A scraper 42 is fixedly connected to the outside of the main shaft 5, i.e., the side closest to the fixed filter screen 41. The scraper 42 is designed to scrape the outside of the filter screen to prevent clogging. A rotating filter screen 43 is fixedly connected to the outside of the main shaft 5, i.e., the side away from the scraper 42. The rotating filter screen 43 is designed to provide good filtration capacity, allowing it to block impurities of different sizes when used with the fixed filter screen 41. A toggle ring 45 is fixedly connected to the outside of the rotating filter screen 43. The toggle ring 45 is designed to provide good connection capacity, allowing the rotating filter screen 43 and the main shaft 5 to rotate when rotated, thus adjusting the aperture size when used with the fixed filter screen 41. A rotating assembly 44 is fixedly connected inside the toggle ring 45. 44 includes a rotating shaft 441, designed to provide good rotational capability. The inner ring is fixed to the outside of the outer pipe 3, and the inner wall of the rotating shaft 441 is fixedly connected to the outside of the outer pipe 3. A sealing plate 442 is fixedly connected to the outer side of the rotating shaft 441. It is designed to be installed on the outer ring of the rotating shaft 441, so that the sealing plate 442 can be rotated by rotation. The inside of the actuating ring 45, that is, the side near the rotating shaft 441, is provided with a docking groove 443. It is designed to have good connection capability with the actuating ring 45, so that the actuating ring 45 can rotate well. At the same time, the sealing plate 442 and the docking groove 443 can provide good sealing capability, and the outside of the sealing plate 442 is fixedly connected to the inside of the docking groove 443. The outer side of the discharge pipe 7 is fixedly connected to the outside of the actuating ring 45. When the actuating ring 45 is turned, it can drive the rotating filter screen 43 and the actuating ring 45 to rotate. It can perform pore adjustment filtration and scrape and clean the outside of the fixed filter screen 41 at the same time.

[0013] Reference Figure 3 and Figure 4The adjusting mechanism 6 includes a rotating ring 61, which is designed to provide good rotational capability. The rotating ring 61 is rotatably connected to the outside of the main shaft 5, i.e., the side near the discharge pipe 7. Two locking plates 62 are fixedly connected to the outside of the rotating ring 61, which are designed to provide good locking and sealing capabilities, enabling control of the conveying flow rate. Two fixing plates 63 are fixedly connected to the outside of the main shaft 5, i.e., the side near the discharge pipe 7, which are designed to provide good fixing capabilities, enabling different flow rate adjustments through the combination of fixing plates 63 and locking plates 62. At the same time, when the actuating ring 45 drives the main shaft 5 and the rotating filter screen 43 to rotate, the fixing plates 63 can rotate together, enabling different flow rate controls through the combination with locking plates 62. The outside of the locking plates 62 is located outside of the fixing plates 63, i.e., the side near the discharge pipe 7, and the outside of the locking plates 62 and the fixing plates 63 are rotatably connected to the inside of the discharge pipe 7.

[0014] Working Principle: Low-concentration methane enters the device through the external pipe 3, first passing through the filter mechanism 4 installed on the inner wall of the external pipe 3. The fixed filter screen 41 in the filter mechanism 4 performs preliminary filtration of impurities in the methane, preventing larger particles from entering subsequent equipment. Simultaneously, the scraper 42 on the main shaft 5 scrapes the surface of the fixed filter screen 41, removing impurities adhering to the filter screen surface, preventing clogging, and ensuring smooth methane passage. After preliminary filtration by the fixed filter screen 41, the methane continues to flow into the rotating filter screen 43. The rotating filter screen 43 works in conjunction with the fixed filter screen 41 to further filter impurities in the methane. Through the synergistic effect of the two filter screens, impurity particles of different sizes can be effectively blocked, improving the purity of the methane. The rotation of the rotating filter screen 43 is driven by the actuating ring 45, which rotates through its internal rotating component 44. The rotating shaft 441 in the rotating assembly 44 is fixed to the outside of the outer pipe 3. The sealing plate 442 is installed on the outer ring of the rotating shaft 441. The rotation of the rotating shaft 441 drives the sealing plate 442 to rotate, thereby driving the actuating ring 45 to rotate. The rotation of the actuating ring 45 not only drives the rotating filter screen 43 to rotate, but also enables the scraper 42 to scrape and clean the fixed filter screen 41 through the rotation of the main shaft 5, realizing the self-cleaning function of the filter screen. The gas after being processed by the filtration mechanism 4 enters the combustion chamber 21 and undergoes a combustion reaction in the combustion chamber 21 to produce high-temperature flue gas. The flue gas produced by combustion is discharged through the connecting pipe 22 and finally discharged to the outside through the chimney 23. A heat exchanger 24 is set at the bottom of the connecting pipe 22. When the high-temperature flue gas passes through the heat exchanger 24, it transfers heat to the medium in the heat exchanger 24 to realize heat recovery and utilization, and improve energy utilization efficiency. During the filtration process, the impurities scraped by the scraper 42 and the impurities intercepted by the rotating filter screen 43 are finally discharged from the device through the discharge pipe 7, completing the impurity cleaning process. In the low-concentration gas regenerative oxidation heat extraction flue gas device of this utility model, the regulating mechanism 6 achieves precise control of the gas delivery flow rate through its internal rotating ring 61, locking plate 62, and fixing plate 63. The following is the working process of this device: After gas enters the device through the external pipe 3, the gas flow rate is regulated. The rotating ring 61, with its excellent rotational capability, rotates freely around the main shaft 5. Two locking plates 62 are fixedly connected to the outside of the rotating ring 61, and these plates cooperate with the fixed plate 63 on the main shaft 5. When gas flow needs adjustment, rotating the rotating ring 61 causes the locking plates 62 to rotate accordingly, creating relative movement with the fixed plate 63. The cooperation between the locking plates 62 and the fixed plate 63 determines the gas flow rate through the external pipe 3. When the relative position between the locking plates 62 and the fixed plate 63 changes, the gas flow area also changes, thus controlling the flow rate. When the actuating ring 45 drives the main shaft 5 and the rotating filter screen 43 to rotate, the fixed plate 63 rotates along with the main shaft 5. This design allows the relative position between the fixed plate 63 and the locking plates 62 to be adjusted as needed, thereby achieving different flow rate controls. Both the snap-fit ​​plate 62 and the fixing plate 63 are rotatably connected to the inside of the discharge pipe 7. This structural design not only ensures the flexibility of flow regulation, but also ensures the sealing of gas during transportation through the sealing capability of the snap-fit ​​plate 62, ensuring the purity of gas before combustion and the stability of transportation, thereby improving the operating efficiency and safety of the device.

[0015] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A regenerative heat recovery flue for low concentration gas, comprising a base (1), characterized in that: The base (1) is provided with a processing mechanism (2) at the top. An external pipe (3) is fixedly connected to the outside of the processing mechanism (2). A filter mechanism (4) is provided on the inner wall of the external pipe (3). A main shaft (5) is fixedly connected inside the filter mechanism (4). An adjustment mechanism (6) is provided outside the main shaft (5). A discharge pipe (7) is fixedly connected outside the filter mechanism (4). The filtering mechanism (4) includes a fixed filter screen (41), the outside of which is fixedly connected to the inner wall of the outer pipe (3), the outside of which is rotatably connected to the inside of the fixed filter screen (41), a scraper (42) is fixedly connected to the outside of the main shaft (5), i.e., the side close to the fixed filter screen (41), and a rotating filter screen (43) is fixedly connected to the outside of the main shaft (5), i.e., the side away from the scraper (42), and a toggle ring (45) is fixedly connected to the outside of the rotating filter screen (43), and a rotating assembly (44) is fixedly connected to the inside of the toggle ring (45).

2. A regenerative heat recovery flue for low concentration gas as claimed in claim 1 wherein: The rotating assembly (44) includes a rotating shaft (441), the inner wall of which is fixedly connected to the outside of the outer pipe (3), a sealing plate (442) is fixedly connected to the outer side of the rotating shaft (441), a mating groove (443) is provided inside the actuating ring (45) on the side close to the rotating shaft (441), and the outside of the sealing plate (442) is fixedly connected to the inside of the mating groove (443), and the outer side of the discharge pipe (7) is fixedly connected to the outside of the actuating ring (45).

3. The regenerative oxidation heat extraction flue for low concentration gas according to claim 1, characterized in that: The processing mechanism (2) includes a combustion chamber (21), the bottom of which is fixedly connected to the top of the base (1), and a connecting pipe (22) is fixedly connected to the outer side of the combustion chamber (21).

4. The regenerative oxidation heat extraction flue for low concentration gas according to claim 3, characterized in that: A chimney (23) is fixedly connected to the other side of the connecting pipe (22), and a heat exchanger (24) is fixedly connected to the bottom of the connecting pipe (22).

5. A regenerative oxidation heat extraction flue for low concentration gas according to claim 4, characterized in that: The external pipe (3) is fixedly connected to the outside of the combustion chamber (21) on one side, and the bottom of the heat exchanger (24) is fixedly connected to the top of the base (1).

6. The regenerative oxidation heat extraction flue for low concentration gas according to claim 1, characterized in that: The adjusting mechanism (6) includes a rotating ring (61), which is rotatably connected to the outside of the main shaft (5), i.e., to the side near the discharge pipe (7).

7. A regenerative oxidation heat extraction flue for low concentration gas according to claim 6, characterized in that: The rotating ring (61) is fixedly connected to two locking plates (62), and the main shaft (5) is fixedly connected to two fixing plates (63) on the side closest to the discharge pipe (7).

8. A regenerative oxidation flue for low-concentration methane as described in claim 7, characterized in that: The outer side of the locking plate (62) is located outside the fixing plate (63), i.e., close to the discharge pipe (7), and the outer sides of the locking plate (62) and the fixing plate (63) are rotatably connected to the inside of the discharge pipe (7).

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