High-efficiency waste heat recovery device for low-concentration gas oxidation tail gas

Abstract

The utility model discloses a low -concentration gas oxidation tail gas's high -efficient waste heat recovery unit belongs to waste heat recovery field, including recovery tank and fixedly connected with the air inlet pipe of recovery tank one side, recovery tank surface both sides all are installed with filter discharge mechanism, the inside installation of recovery tank has the waste heat recovery mechanism, the surface installation of waste heat recovery mechanism has the flow guide mechanism, filter discharge mechanism includes fixedly connected with the discharge pipe of recovery tank surface and is linked together with recovery tank, through the cooperation of above -mentioned each device, through the setting of water collecting tank inside water injection, the heat of low -concentration gas oxidation tail gas is absorbed, thereby the waste heat in low -concentration gas oxidation tail gas is recovered, after through the discharge pipe, the low -concentration gas oxidation tail gas of heat absorption is discharged, through the filter screen board to its filtration, make the impurity through the communicating pipe and discharge, avoided the impurity that low -concentration gas oxidation tail gas inside contains to cause the influence to external air.

Description

Technical Field

[0001] This utility model relates to the field of waste heat recovery technology, specifically a high-efficiency waste heat recovery device for low-concentration gas oxidation tail gas. Background Technology

[0002] Waste heat refers to the sensible and latent heat in energy-consuming equipment in operational industrial enterprises that was not rationally utilized in its original design due to limitations imposed by historical, technological, and conceptual factors. It includes waste heat from high-temperature exhaust gases, cooling media, waste gas and wastewater, high-temperature products and slag, chemical reactions, combustible waste gases and liquids, and waste materials. According to surveys, the total waste heat resources of various industries account for approximately 17% to 67% of their total fuel consumption, and about 60% of these resources are recoverable.

[0003] During the oxidation of low-concentration methane gas, a large amount of heat is released in the exhaust gas. Generally, the heat in the exhaust gas is recovered and utilized through a high-efficiency waste heat recovery device for low-concentration methane gas oxidation exhaust gas.

[0004] An investigation revealed a Chinese utility model patent (publication number: CN219415810U) disclosing a high-efficiency waste heat recovery device, comprising a waste heat exchange component, a water storage component, and a shell component. Exhaust gas enters through an inlet pipe, while cold water flows through a water inlet pipe. The exhaust gas fills a gas storage tank, enclosing the heat exchange tank. A stirring element agitates the cold water, ensuring thorough heating. The heated water is then output through a delivery pipe to the water storage component. The water storage component, gas storage tank, and heat exchange tank are housed within the shell component, minimizing heat loss from the hot water within the storage component. The exhausted gas, after heat exchange, is discharged through an outlet pipe. This design efficiently exchanges waste heat from the exhaust gas and avoids the problem of water pipes detaching due to vibration. The waste heat exchange component includes a gas storage tank, a heat exchange tank, a stirring element, a water inlet pipe, an inlet pipe, a delivery pipe, and an outlet pipe. The heat exchange tank is fixedly connected inside the gas storage tank, and the stirring element is fixedly connected to the upper end of the heat exchange tank.

[0005] Although the aforementioned patent utilizes a structure including a gas storage tank, a heat exchange tank, and a stirring component, where the stirring component agitates the cold water to ensure sufficient heating, and the heated water is then output to the water storage component via a delivery pipe, and the water storage component, gas storage tank, and heat exchange tank are located within the outer shell assembly, thus reducing heat loss of the hot water within the water storage component, after the waste heat recovery of low-concentration gas oxidation exhaust gas is completed, some existing technologies lack a filtration mechanism. Consequently, solid impurities contained within the low-concentration gas oxidation exhaust gas are discharged from the waste heat recovery device along with the recovered waste heat, causing these solid impurities to affect the external air and potentially harm human health.

[0006] Therefore, this invention provides a high-efficiency waste heat recovery device for low-concentration gas oxidation tail gas to solve the above problems. Utility Model Content

[0007] (a) Technical problems to be solved

[0008] This invention provides a high-efficiency waste heat recovery device for low-concentration gas oxidation tail gas, aiming to solve the problems mentioned in the background art.

[0009] (II) Technical Solution

[0010] To achieve the above objectives, this utility model provides the following technical solution: a high-efficiency waste heat recovery device for low-concentration gas oxidation tail gas, including a recovery tank and an air inlet pipe fixedly connected to one side of the recovery tank. Both sides of the surface of the recovery tank are equipped with a filter emission mechanism, the inside of the recovery tank is equipped with a waste heat recovery mechanism, and the surface of the waste heat recovery mechanism is equipped with a flow guiding mechanism.

[0011] The filtration and discharge mechanism includes a discharge pipe fixedly connected to and communicating with the surface of the recycling tank. A filter screen is fixedly connected to the inside of the discharge pipe by bolts. A scraper is attached to the surface of the filter screen. An exhaust fan is fixedly connected to the surface of the scraper. A fixing rod is rotatably inserted into the inside of the exhaust fan. The fixing rod is fixedly connected to the discharge pipe. A connecting pipe is fixedly connected to the lower surface of the discharge pipe. The filter screen and the scraper are both corresponding to the connecting pipe. A retaining spring is fixedly connected in a ring array inside the connecting pipe. A collection mechanism is installed at one end of several retaining springs.

[0012] As a preferred technical solution of this application, the collection mechanism includes a connector that is fixedly connected to one end of a plurality of clamping springs. The connector is connected to a connecting pipe. A collection box is slidably sleeved on the surface of the connector. A fixing plate that is fixedly connected to a recycling tank is slidably connected to the lower surface of the collection box.

[0013] As a preferred technical solution of this application, the waste heat recovery mechanism includes a water collection tank fixedly connected to the bottom wall of the recovery tank, an inlet pipe fixedly connected to one side of the water collection tank through the recovery tank, and a stirring rod rotatably connected inside the water collection tank.

[0014] As a preferred technical solution of this application, the waste heat recovery mechanism further includes a drive motor fixedly connected to one end of the stirring rod, the drive motor being fixedly connected to the inside of the recovery tank, and heat-absorbing fins being fixedly connected to the surface of the water collection tank in a path array.

[0015] As a preferred technical solution of this application, the diversion mechanism includes a water collection tank formed on the bottom wall of the recycling tank. Two corresponding drain pipes are fixedly connected inside the water collection tank. One end of the two drain pipes is fixedly connected to a water outlet pipe, which is connected to the water collection tank.

[0016] As a preferred technical solution of this application, one end of the water outlet pipe passes through the recycling tank and is equipped with a valve, the water collection tank corresponds to the heat absorption fins, a base plate is fixedly connected to the lower surface of the recycling tank, and the water outlet pipe is installed inside the base plate.

[0017] (III) Beneficial Effects

[0018] By incorporating a filtration and emission system and a waste heat recovery system, low-concentration methane oxidation exhaust gas is discharged into the recovery tank through an inlet pipe. The water collection tank absorbs the heat from the low-concentration methane oxidation exhaust gas, thus recovering the waste heat. The exhaust gas, after heat absorption, is then discharged through an emission pipe. The exhaust gas is filtered through a filter screen, allowing impurities to be discharged through a connecting pipe, preventing these impurities from affecting the outside air during the emission of the low-concentration methane oxidation exhaust gas.

[0019] The circulation of low-concentration gas oxidation exhaust gas drives the exhaust fan to rotate, which not only improves the efficiency of low-concentration gas oxidation exhaust gas emission, but also causes the exhaust fan to drive the scraper to rotate. The scraper cleans the impurities attached to the surface of the filter screen, and the cleaned impurities are discharged through the connecting pipe, making the filter screen more convenient to use.

[0020] By using a flow guiding mechanism, when low-concentration gas oxidation exhaust gas enters the recovery tank and comes into contact with the water collection tank, the alternating hot and cold temperatures cause the low-concentration gas oxidation exhaust gas to condense into water droplets that adhere to the surface of the water collection tank. Thus, the heat absorption fins not only improve the heat absorption efficiency of the water collection tank but also guide the condensed water droplets into the water collection tank and finally discharge them through the drain pipe. This improves both the waste heat recovery efficiency and the utilization rate of low-concentration gas oxidation exhaust gas. Attached Figure Description

[0021] Figure 1 A schematic diagram of a high-efficiency waste heat recovery device for low-concentration methane oxidation tail gas.

[0022] Figure 2 A schematic diagram of the waste heat recovery mechanism in a high-efficiency waste heat recovery device for low-concentration gas oxidation tail gas.

[0023] Figure 3A schematic diagram of the filtration and emission mechanism in a high-efficiency waste heat recovery device for low-concentration methane oxidation tail gas.

[0024] Figure 4 A schematic diagram of the flow guiding mechanism in a high-efficiency waste heat recovery device for low-concentration gas oxidation tail gas.

[0025] Figure 5 A schematic diagram of the water collection tank in a high-efficiency waste heat recovery device for low-concentration gas oxidation tail gas.

[0026] Figure 6 This is a schematic diagram of the filter screen in a high-efficiency waste heat recovery device for low-concentration gas oxidation tail gas.

[0027] In the picture:

[0028] 1. Recycling tank; 2. Discharge pipe; 3. Filter screen; 4. Scraper; 5. Exhaust fan; 6. Fixing rod; 7. Connecting pipe; 8. Pressing spring; 9. Insertion pipe; 10. Collection box; 11. Water collection tank; 12. Water inlet pipe; 13. Stirring rod; 14. Drive motor; 15. Heat-absorbing fins; 16. Water collection trough; 17. Drain pipe; 18. Water outlet pipe. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] This utility model provides a high-efficiency waste heat recovery device for low-concentration gas oxidation tail gas, such as... Figures 1-6 As shown, the high-efficiency waste heat recovery device for low-concentration gas oxidation tail gas includes a recovery tank 1 and an air inlet pipe fixedly connected to one side of the recovery tank 1. A bottom plate is fixedly connected to the lower surface of the recovery tank 1. Filter discharge mechanisms are installed on both sides of the surface of the recovery tank 1. A waste heat recovery mechanism is installed inside the recovery tank 1. The waste heat recovery mechanism includes a water collection tank 11 fixedly connected to the bottom wall of the recovery tank 1. A water inlet pipe 12 is fixedly connected to one side of the water collection tank 11 through the recovery tank 1. The high-concentration gas oxidation tail gas is discharged into the interior of the recovery tank 1 through the air inlet pipe, and external water is transported to the interior of the water collection tank 11 through the water inlet pipe 12, so that the water collection tank 11 and the water flow simultaneously absorb the heat contained in the high-concentration gas oxidation tail gas.

[0031] The water collection tank 11 is rotatably connected to a stirring rod 13. The waste heat recovery mechanism also includes a drive motor 14 fixedly connected to one end of the stirring rod 13. The drive motor 14 is fixedly connected to the inside of the recovery tank 1. When the drive motor 14 is started, its output end drives the stirring rod 13 to rotate, causing the water inside the water collection tank 11 to surge, thereby improving the heat absorption efficiency of the water collection tank 11.

[0032] The surface of the water collection tank 11 is fixedly connected with heat-absorbing fins 15 in a path array. The surface of the waste heat recovery mechanism is equipped with a flow guiding mechanism, which includes a water collection trough 16 opened in the bottom wall of the recovery tank 1. The water collection trough 16 corresponds to the heat-absorbing fins 15. When the concentrated gas oxidation tail gas enters the interior of the recovery tank 1 and comes into contact with the water collection tank 11, the concentrated gas oxidation tail gas condenses into water droplets and adheres to the surface of the water collection tank 11. Through the arrangement of the heat-absorbing fins 15, not only can the water droplets be guided to enter the interior of the water collection trough 16, but the heat absorption efficiency of the water collection tank 11 can also be improved, thereby making the high-efficiency waste heat recovery device for low-concentration gas oxidation tail gas more efficient.

[0033] The water collection tank 16 has two corresponding drain pipes 17 fixedly connected inside. One end of the two drain pipes 17 is fixedly connected to a water outlet pipe 18. The water outlet pipe 18 is installed inside the bottom plate. One end of the water outlet pipe 18 passes through the recovery tank 1 and is equipped with a valve. The water outlet pipe 18 is connected to the water collection tank 11. The filtration and discharge mechanism includes a discharge pipe 2 fixedly connected to the surface of the recovery tank 1 and connected to the recovery tank 1. A filter screen plate 3 is fixedly connected inside the discharge pipe 2 by bolts. Through the setting of the discharge pipe 2, low-concentration gas oxidation tail gas enters the discharge pipe 2 and is discharged, so that the low-concentration gas oxidation tail gas passes through the filter screen plate 3 and is filtered, so that the impurities contained in the low-concentration gas oxidation tail gas are filtered on the surface of the filter screen plate 3.

[0034] A scraper plate 4 is attached to the surface of the filter screen plate 3. An exhaust fan 5 is fixedly connected to the surface of the scraper plate 4. A fixing rod 6 is inserted into the interior of the exhaust fan 5. The exhaust fan 5 is designed so that when the low-concentration gas oxidation exhaust gas is discharged, it drives the exhaust fan 5 to rotate. This not only improves the efficiency of low-concentration gas oxidation exhaust gas discharge, but also causes the exhaust fan 5 to drive the scraper plate 4 to rotate and scrape the surface of the filter screen plate 3, making the filter screen plate 3 more convenient to use.

[0035] The fixing rod 6 is fixedly connected to the discharge pipe 2. The lower surface of the discharge pipe 2 is fixedly connected to the connecting pipe 7, which is connected to the discharge pipe 2. The filter screen plate 3 and the scraper plate 4 are both corresponding to the connecting pipe 7. The interior of the connecting pipe 7 is fixedly connected to the clamping springs 8 in a ring array. One end of several clamping springs 8 is jointly installed with a collection mechanism. The collection mechanism includes a plug pipe 9 that is fixedly connected to one end of several clamping springs 8. The plug pipe 9 is connected to the connecting pipe 7. Through the setting of the clamping springs 8, the plug pipe 9 slides inside the connecting pipe 7, so that the plug pipe 9 can be detached from the collection box 10, which facilitates the replacement of the collection box 10 by the staff. The surface of the plug pipe 9 is slidably fitted with the collection box 10. Through the setting of the connecting pipe 7 and the plug pipe 9, impurities enter the interior of the collection box 10 through the plug pipe 9, completing the collection of impurities. The lower surface of the collection box 10 is slidably connected to the fixing plate that is fixedly connected to the recycling tank 1.

[0036] Specifically, when this high-efficiency waste heat recovery device for low-concentration gas oxidation tail gas is in use: the high-concentration gas oxidation tail gas is discharged into the recovery tank 1 through the air inlet pipe, and external water is transported into the water collection tank 11 through the water inlet pipe 12, so that the water collection tank 11 and the water flow simultaneously absorb the heat contained in the high-concentration gas oxidation tail gas. At the same time, the drive motor 14 is started, and its output end drives the stirring rod 13 to rotate, causing the water flow inside the water collection tank 11 to surge, thereby improving the heat absorption efficiency of the water collection tank 11. When the high-concentration gas oxidation tail gas enters the recovery tank 1 and comes into contact with the water collection tank 11, the high-concentration gas oxidation tail gas condenses into water droplets and adheres to the surface of the water collection tank 11. Through the setting of the heat absorption fins 15, not only can the water droplets be guided into the water collection tank 16, but the heat absorption efficiency of the water collection tank 11 can also be improved, thereby making the high-efficiency waste heat recovery device for low-concentration gas oxidation tail gas more efficient.

[0037] When absorbing heat from low-concentration gas oxidation tail gas, the low-concentration gas oxidation tail gas is discharged into the discharge pipe 2 through the setting of the discharge pipe 2, so that the low-concentration gas oxidation tail gas passes through the filter screen plate 3 and is filtered, so that the impurities contained in the low-concentration gas oxidation tail gas are filtered onto the surface of the filter screen plate 3, thereby avoiding the impact on the surrounding environment when discharging the low-concentration gas oxidation tail gas. Through the setting of the connecting pipe 7 and the insertion pipe 9, the impurities are allowed to enter the collection box 10 through the insertion pipe 9, thus completing the collection of impurities.

[0038] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A high-efficiency waste heat recovery device for low-concentration gas oxidation tail gas, comprising a recovery tank (1) and an inlet pipe fixedly connected to one side of the recovery tank (1), characterized in that: The recycling tank (1) is equipped with a filter discharge mechanism on both sides of its surface, and a waste heat recovery mechanism is installed inside the recycling tank (1). A flow guiding mechanism is installed on the surface of the waste heat recovery mechanism. The filtration and discharge mechanism includes a discharge pipe (2) fixedly connected to the surface of the recycling tank (1) and communicating with the recycling tank (1). A filter screen plate (3) is fixedly connected to the inside of the discharge pipe (2) by bolts. A scraper plate (4) is attached to the surface of the filter screen plate (3). An exhaust fan (5) is fixedly connected to the surface of the scraper plate (4). A fixing rod (6) is rotatably inserted into the inside of the exhaust fan (5). The fixing rod (6) is fixedly connected to the discharge pipe (2). A connecting pipe (7) communicating with the discharge pipe (2) is fixedly connected to the lower surface of the discharge pipe (2). The filter screen plate (3) and the scraper plate (4) are both corresponding to the connecting pipe (7). A retaining spring (8) is fixedly connected in a ring array inside the connecting pipe (7). A collection mechanism is installed at one end of several retaining springs (8).

2. The high-efficiency waste heat recovery device for low-concentration gas oxidation tail gas according to claim 1, characterized in that: The collection mechanism includes a connector (9) that is fixedly connected to one end of several clamping springs (8). The connector (9) is connected to a connecting pipe (7). A collection box (10) is slidably sleeved on the surface of the connector (9). A fixing plate that is fixedly connected to the recycling tank (1) is slidably connected to the lower surface of the collection box (10).

3. The high-efficiency waste heat recovery device for low-concentration gas oxidation tail gas according to claim 1, characterized in that: The waste heat recovery mechanism includes a water collection tank (11) fixedly connected to the bottom wall of the recovery tank (1). A water inlet pipe (12) is fixedly connected to one side of the water collection tank (1) through the recovery tank (1). A stirring rod (13) is rotatably connected inside the water collection tank (11).

4. The high-efficiency waste heat recovery device for low-concentration gas oxidation tail gas according to claim 3, characterized in that: The waste heat recovery mechanism also includes a drive motor (14) fixedly connected to one end of the stirring rod (13), the drive motor (14) being fixedly connected to the inside of the recovery tank (1), and heat-absorbing fins (15) being fixedly connected to the surface of the water collection tank (11) in a path array.

5. The high-efficiency waste heat recovery device for low-concentration gas oxidation tail gas according to claim 4, characterized in that: The flow guiding mechanism includes a water collection trough (16) opened on the bottom wall of the recycling tank (1). The water collection trough (16) has two corresponding drain pipes (17) fixedly connected inside. One end of the two drain pipes (17) is fixedly connected to a water outlet pipe (18), which is connected to the water collection tank (11).

6. The high-efficiency waste heat recovery device for low-concentration gas oxidation tail gas according to claim 5, characterized in that: One end of the water outlet pipe (18) passes through the recycling tank (1) and is equipped with a valve. The water collection tank (16) corresponds to the heat absorption fins (15). A base plate is fixedly connected to the lower surface of the recycling tank (1), and the water outlet pipe (18) is installed inside the base plate.

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