Heat recovery system based on rto offgas treatment

Abstract

This utility model discloses a heat recovery system based on RTO waste gas treatment, including a hot water storage tank with an inlet and an outlet on its surface; a serpentine gas guide pipe arranged inside the hot water storage tank, with both ends extending to the outside of the tank; and a treatment mechanism including a purification shell, smoke guide plates, and spray components. The purification shell is connected to the gas guide pipe, and multiple smoke guide plates are arranged circumferentially inside the purification shell, forming a flue gas channel. The spray components are located above the purification shell and are used to spray the gas in the flue gas channel. A filter end is connected to the lower end of the purification shell. The beneficial effect of this utility model is that it solves the technical problem in existing waste gas heat recovery systems where harmful impurities in the waste gas are not purified, leading to blockages in the subsequent exhaust pipe flow and direct discharge of incompletely purified waste gas, which easily affects the atmospheric environment.

Description

Technical Field

[0001] This utility model relates to the field of waste gas treatment technology, specifically to a heat recovery system based on RTO waste gas treatment. Background Technology

[0002] Waste gas heat treatment and recovery technology is mainly applied in industrial production processes. By recovering heat from emitted waste gas, it reduces energy consumption and environmental impact. This not only helps improve energy efficiency but also reduces operating costs for enterprises and meets increasingly stringent environmental standards. Industrial waste gas usually comes from combustion processes, chemical reactions, drying, and heating processes. These waste gases often contain a large amount of heat energy and pollutants, such as particulate matter, sulfur oxides, nitrogen oxides, and volatile organic compounds (VOCs). Since directly emitting these high-temperature waste gases leads to energy waste and increases greenhouse gas emissions, effective treatment and recovery methods are needed. Heat recovery mainly involves transferring the heat from the waste gas to other media (usually air or water) through heat exchangers to preheat the fresh air or water entering the system or to directly meet the heating needs of the production process. Chinese utility model CN214666224U proposes a "high-temperature waste gas heat recovery device". This device increases the contact area between the vent pipe and tap water by setting the vent pipe to an "S" shape. The flow rate of high-temperature waste gas is slowed down by the baffle inside the vent pipe, resulting in better heat recovery of high-temperature waste gas. The temperature of the tap water inside the heat recovery mechanism is detected by a temperature sensor, and the temperature sensor controls the solenoid valve to facilitate tap water replacement, thus improving the working efficiency of the heat recovery device. Although this device improves the utilization efficiency of waste heat from waste gas, the waste gas may contain a large number of impurities. These impurities are discharged directly without filtration, which can easily cause serious pollution to the atmospheric environment. At the same time, during the flow of waste gas in the duct, impurities are easily deposited inside the duct, forming blockages. Especially under long-term high-load operation, a large amount of dust and impurities will accumulate inside the duct, affecting the normal operation of the equipment. Utility Model Content

[0003] The purpose of this invention is to overcome the above-mentioned technical deficiencies and provide a heat recovery system based on RTO waste gas treatment. This system solves the technical problem in the existing waste gas heat recovery system that the harmful impurities in the waste gas are not purified, which leads to blockage in the subsequent exhaust pipe flow process and the direct emission of incompletely purified waste gas, which easily affects the atmospheric environment.

[0004] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: In a first aspect, this utility model provides a heat recovery system based on RTO waste gas treatment, comprising: The hot water storage tank has an inlet and an outlet on its surface. The air duct is arranged in a serpentine pattern inside the hot water storage tank, with both ends extending to the outside of the hot water storage tank; The processing mechanism includes a purification shell, a smoke guide plate, and a spray component. The purification shell is connected to the air guide pipe, and multiple smoke guide plates are arranged circumferentially inside the purification shell to form a flue gas channel. The spray component is located above the purification shell and is used to spray the gas in the flue gas channel. A filter end is connected to the lower end of the purification shell. The filter end is used to filter the sprayed liquid and to provide circulating spraying for the spray component.

[0005] In some embodiments, a first mounting plate and a second mounting plate are symmetrically arranged inside the purification shell, and a flow guiding area is formed between the first mounting plate, the second mounting plate and the inner wall of the purification shell. Both the first mounting plate and the second mounting plate are provided with flow ports.

[0006] In some embodiments, a flue gas passage is provided between the first mounting plate and the second mounting plate.

[0007] In some embodiments, a plurality of filter screens are provided in the flow guiding area, and the filter screens include any one or more of stainless steel wire mesh, glass fiber filter mesh, activated carbon fiber mesh, ceramic fiber mesh and polyester fiber filter mesh.

[0008] In some embodiments, a cylindrical body is provided at the center of the purification shell, and a plurality of smoke guide plates are provided on the outer periphery of the cylindrical body, with gaps maintained between the plurality of smoke guide plates to facilitate the flow of flue gas.

[0009] In some embodiments, the spraying component includes a spray disc, a first conduit, a pump body, and a second conduit; the spray disc is disposed at the top of the purification housing, and the upper end of the spray disc is connected to the first conduit, the end of the first conduit is connected to the pump body, the lower end of the pump body is connected to the second conduit, and the end of the second conduit extends into the filter end.

[0010] In some embodiments, the spray plate is equipped with a plurality of spray heads, which are used to spray gas into the flue gas passage.

[0011] In some embodiments, the filter end includes a filter element and a water storage tank. The purification shell is connected to the water storage tank through the filter element. The water storage tank is connected to the second conduit. The water storage tank is also provided with a stirring end. The water storage tank is provided with a water inlet and a drain outlet on its exterior.

[0012] In some embodiments, the filter element includes a first filter screen, a second filter screen, and a third filter screen; the first filter screen is a stainless steel filter screen, the second filter screen is a polypropylene filter screen, and the third filter screen is an activated carbon filter screen.

[0013] In some embodiments, the stirring end includes a motor, a shaft, and stirring blades; the motor is disposed in the water tank, the output end of the motor is connected to the shaft, and a plurality of stirring blades are connected to the shaft.

[0014] Compared with existing technologies, the heat recovery system based on RTO waste gas treatment provided by this utility model has an inlet and an outlet on the surface of the hot water storage tank, and the air guide pipe is arranged in a serpentine pattern inside the hot water storage tank. This not only increases the contact area between the high-temperature waste gas and the medium inside the hot water storage tank, but also prolongs the residence time of the waste gas in the hot water storage tank, thereby improving the heat transfer efficiency. The purification shell is connected to the air guide pipe, and multiple smoke guide plates are arranged circumferentially inside the purification shell to form a flue gas channel. A spray element is located above the purification shell to spray and purify the gas in the flue gas channel. To remove particulate matter and other harmful substances from the exhaust gas and prevent air pollution caused by the direct emission of incompletely purified exhaust gas, the lower end of the purification shell is connected to the filter end. The filter end is used to filter the liquid after spraying and is used for the recycling of the spray components, avoiding waste of water resources and reducing the cost of wastewater treatment. This further improves the economic and environmental performance of the system. Compared with the existing technology, which is prone to blockage due to the easy deposition of impurities in the exhaust gas inside the air guide pipe, this device can significantly reduce the possibility of impurities in the exhaust gas entering the subsequent pipe body, ensuring the long-term stable operation of the equipment. Attached Figure Description

[0015] Figure 1 This is an overall schematic diagram of the heat recovery system based on RTO waste gas treatment provided in this embodiment of the utility model; Figure 2 This is an internal schematic diagram of the heat recovery system based on RTO waste gas treatment provided in this embodiment of the utility model; Figure 3 This is a schematic diagram of the internal structure of the water tank of the heat recovery system based on RTO waste gas treatment provided in this embodiment of the utility model; Figure 4 This is a schematic diagram of the interior of the purification shell of the heat recovery system based on RTO waste gas treatment provided in this embodiment of the utility model; Figure 5 This is a schematic diagram of the filter element of the heat recovery system based on RTO waste gas treatment provided in this embodiment of the utility model.

[0016] Explanation of reference numerals in the attached drawings: 1. Hot water storage tank; 11. Inlet; 12. Outlet; 2. Air guide pipe; 3. Processing mechanism; 31. Purification shell; 311. First mounting plate; 312. Second mounting plate; 313. Flow port; 314. Filter screen; 32. Smoke guide plate; 33. Spray component; 331. Spray disc; 332. First guide pipe; 333. Pump body; 334. Second guide pipe; 34. Cylinder; 35. Filter end; 351. Filter component; 3511. First filter screen; 3512. Second filter screen; 3513. Third filter screen; 352. Water storage tank; 353. Stirring end; 3531. Motor; 3532. Shaft; 3533. Stirring blade. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0018] To address the technical problem of low purification efficiency of waste gas in waste gas heat recovery treatment devices, which leads to waste gas residue in the pipe body, this utility model provides a heat recovery system based on RTO waste gas treatment, which can purify the waste gas after heat recovery and avoid the situation where harmful substances remain in the discharged waste gas.

[0019] It should be noted that the heat recovery system based on RTO waste gas treatment described in this utility model is used in, but not limited to, the field of waste gas treatment. For ease of explanation, this utility model only uses the application of the heat recovery system based on RTO waste gas treatment in the field of waste gas treatment as an example. The principle of the heat recovery system based on RTO waste gas treatment applied to other types of equipment is essentially the same as that applied to the field of waste gas treatment, and will not be described in detail here.

[0020] Please see Figure 1 , Figure 1 This is a schematic diagram of a heat recovery system based on RTO waste gas treatment in one embodiment of the present invention. The heat recovery system based on RTO waste gas treatment includes a hot water storage tank 1, which has an inlet 11 and an outlet 12 respectively opened on its surface. The air duct 2 is arranged in a serpentine pattern inside the hot water storage tank 1, with both ends extending to the outside of the hot water storage tank 1; The processing unit 3 includes a purification shell 31, a smoke guide plate 32, and a spray component 33. The purification shell 31 is connected to the air guide pipe 2, and multiple smoke guide plates 32 are arranged circumferentially inside the purification shell 31, forming a flue gas channel inside the purification shell 31. The spray component 33 is arranged above the purification shell 31 and is used to spray the gas in the flue gas channel. A filter end 35 is connected to the lower end of the purification shell 31. The filter end 35 is used to filter the liquid after spraying and to provide circulating spraying for the spray component 33.

[0021] In this embodiment, by providing an inlet 11 and an outlet 12 on the surface of the hot water storage tank 1, and arranging the air guide pipe 2 in a serpentine manner inside the hot water storage tank 1, not only is the contact area between the high-temperature exhaust gas and the medium inside the hot water storage tank 1 increased, but the residence time of the exhaust gas in the hot water storage tank 1 is also extended, thereby improving the heat transfer efficiency. The purification shell 31 is connected to the air guide pipe 2, and multiple smoke guide plates 32 are arranged circumferentially inside the purification shell 31, forming a flue gas channel. The spray element 33 is located above the purification shell 31 and is used to spray and purify the gas in the flue gas channel, removing particulate matter from the exhaust gas. To prevent air pollution caused by the direct emission of incompletely purified exhaust gas and other harmful substances, the lower end of the purification shell 31 is connected to the filter end 35. The filter end 35 is used to filter the liquid after spraying and to provide it for the spraying component 33 to circulate. This avoids the waste of water resources and reduces the cost of wastewater treatment, further improving the economic and environmental performance of the system. Compared with the existing technology, which is prone to blockage due to the easy deposition of impurities in the exhaust gas inside the air guide pipe 2, this device can significantly reduce the possibility of impurities in the exhaust gas entering the subsequent pipe body, ensuring the long-term stable operation of the equipment.

[0022] In one embodiment, please refer to Figures 1-5 To increase the residence time of exhaust gas in the purification shell 31, a first mounting plate 311 and a second mounting plate 312 are symmetrically arranged inside the purification shell 31. A flow guiding area is formed between the first mounting plate 311, the second mounting plate 312 and the inner wall of the purification shell 31. Both the first mounting plate 311 and the second mounting plate 312 are provided with flow ports 313. A flue gas channel is provided between the first mounting plate 311 and the second mounting plate 312. Multiple filter screens 314 are provided in the flow guiding area. The filter screens 314 include any one or more of stainless steel wire mesh, glass fiber filter, activated carbon fiber mesh, ceramic fiber mesh and polyester fiber filter. A cylinder 34 is provided at the center of the purification shell 31. Several smoke guide plates 32 are provided circumferentially on the outer periphery of the cylinder 34, and gaps are maintained between the smoke guide plates 32 to facilitate the flow of flue gas.

[0023] In this embodiment, the first mounting plate 311 and the second mounting plate 312, symmetrically arranged inside the purification shell 31, form a flow guiding area between themselves and the inner wall of the purification shell 31. This extends the flow path of the exhaust gas within the purification shell 31, increasing the residence time of the exhaust gas in the purification device. This allows harmful substances in the exhaust gas to have more opportunities to come into contact with the spray liquid and be removed. Both the first mounting plate 311 and the second mounting plate 312 have flow ports 313, and a flue gas channel is provided between the two plates. These flow ports 313 guide the exhaust gas through a specific path, ensuring that the gas is evenly distributed inside the purification shell 31, avoiding short circuits or poor flow in local areas, thereby improving efficiency. To improve overall purification efficiency, multiple filter plates 314 are installed in the flow guiding area, including one or more combinations of stainless steel wire mesh, glass fiber filter, activated carbon fiber mesh, ceramic fiber mesh, and polyester fiber filter. These filter plates 314 of different materials can effectively capture particulate matter and other pollutants of different sizes, providing multi-level purification effects and significantly reducing the concentration of harmful substances in the exhaust gas. Several smoke guide plates 32 are arranged on the outer periphery of the cylinder 34 at the center of the purification shell 31, and a certain gap is maintained between each smoke guide plate 32, which helps to extend the residence time of exhaust gas entering the purification shell 31, further improving the spraying efficiency and enhancing the overall treatment effect.

[0024] In one embodiment, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 5 To improve the utilization efficiency of the spray liquid, the spray component 33 includes a spray plate 331, a first conduit 332, a pump body 333, and a second conduit 334. The spray plate 331 is located at the top inside the purification shell 31, and the upper end of the spray plate 331 is connected to the first conduit 332. The end of the first conduit 332 is connected to the pump body 333, and the lower end of the pump body 333 is connected to the second conduit 334. The end of the second conduit 334 extends into the filter end 35. Several spray heads are installed on the spray plate 331, and the spray heads are used to spray the gas in the flue gas passage. The filter end 35 includes a filter element 351 and a water storage tank 352. The purification shell 31 is connected to the water storage tank 352 through the filter element 351. The water storage tank 352 is connected to the second conduit 334. The water storage tank 352 is also provided with a stirring end 353. The water storage tank 352 is provided with a water inlet and a drain outlet on its exterior. The filter element 351 includes a first filter screen 3511, a second filter screen 3512 and a third filter screen 3513. The first filter screen 3511 is a stainless steel filter screen, the second filter screen 3512 is a polypropylene filter screen and the third filter screen 3513 is an activated carbon filter screen.

[0025] In this embodiment, the spray plate 331 in the spray component 33 is located at the top inside the purification shell 31, and several spray heads are installed on it. This effectively ensures that the spray liquid can be evenly distributed and cover the entire flue gas channel, allowing pollutants in the exhaust gas to come into more full contact with the spray liquid, thereby improving the purification efficiency of the exhaust gas. The spray plate 331 is connected to the pump body 333 through the first conduit 332, and the lower end of the pump body 333 is connected to the water storage tank 352 inside the filter component 351 through the second conduit 334, realizing the recycling of the spray liquid, reducing the consumption of fresh water, and lowering the wastewater treatment cost and overall operating cost. The purification shell 31 is connected to the water storage tank 352 through the filter component 351. The water storage tank 352 is equipped with a stirring end 353. The sprayed liquid undergoes multi-stage filtration through the filter component 351, including a stainless steel filter screen, a polypropylene filter screen, and an activated carbon filter screen, effectively removing particulate matter and other impurities. The liquid then passes through the stirring end 353. The one-step mixing ensures the cleanliness and stability of the spray liquid. The filter element 351 includes a first filter screen 3511, a second filter screen 3512, and a third filter screen 3513. The first filter screen 3511 is a stainless steel filter screen, the second filter screen 3512 is a polypropylene filter screen, and the third filter screen 3513 is an activated carbon filter screen. These filter screens of different materials can effectively remove pollutants of different particle sizes and types, ensuring that the reused spray liquid has high purity, preventing secondary pollution, and ensuring the effect of waste gas treatment. The water storage tank 352 is equipped with a water inlet and a drain outlet on the outside, which facilitates the regular replenishment of fresh water or the discharge of used wastewater, simplifying the daily operation and maintenance process. The water storage tank 352 is a cylindrical body 34 with trapezoidal shells on both sides. One trapezoidal shell is connected to the cylindrical body 34 through a mesh plate, and the water inlet and drain outlet are connected to this trapezoidal shell; the other is a sealed structure, which facilitates the installation of the motor 3531.

[0026] In one embodiment, please refer to Figures 1-3 To improve the mixing efficiency of the sprayed liquid by the stirring end 353, the stirring end 353 includes a motor 3531, a shaft 3532 and stirring blades 3533; the motor 3531 is installed in the water storage tank 352, the output end of the motor 3531 is connected to the shaft 3532, and several stirring blades 3533 are connected to the shaft 3532.

[0027] In this embodiment, the motor 3531 in the stirring end 353 is located inside the water storage tank 352. The motor 3531 drives the shaft 3532 to rotate, which in turn drives several stirring blades 3533 mounted on it to work. This effectively and uniformly stirs the spray liquid after multi-stage filtration, ensuring that the chemical agents or additives in the spray liquid are fully dissolved and evenly distributed, thereby improving the capture and purification efficiency of pollutants in the exhaust gas. During the recycling of the spray liquid, a small amount of incompletely filtered microparticles or other impurities may accumulate at the bottom of the water storage tank 352. The continuous rotation of the stirring blades 3533 can effectively prevent the accumulation of these impurities, avoiding the problem of pipe or pump body 333 blockage due to long-term accumulation, thereby extending the service life of the entire system and reducing the maintenance frequency. The stirring blades 3533 can maintain the uniformity and stability of the spray liquid composition, especially when chemical agents are added, ensuring that the agent concentration is consistent each time it is sprayed. This not only improves the exhaust gas treatment effect, but also ensures the long-term stable operation of the system and reduces the fluctuation of treatment efficiency caused by uneven spray liquid. By recycling the spray liquid through the stirring end 353, the amount of fresh water replenishment and wastewater discharge can be significantly reduced, which saves water resources, reduces wastewater treatment costs, and improves the economic efficiency of the system. Moreover, the speed of the stirring blades 3533 can be adjusted by controlling the speed of the motor 3531 according to actual operating needs, so as to adapt to different spray liquid characteristics and treatment requirements. For example, when treating exhaust gas containing a lot of suspended particles, the stirring intensity can be increased to ensure that the spray liquid always maintains good fluidity and uniformity.

[0028] To better understand this utility model, the following is combined with... Figures 1 to 5The technical solution of this utility model is described in detail as follows: An appropriate amount of spray liquid is injected into the water storage tank 352 through the water inlet on the tank 352 to ensure the liquid level reaches an appropriate height, thus guaranteeing the normal operation of the spray system. The high-temperature waste gas to be treated is connected to the system through the air guide pipe 2, which is arranged in a serpentine pattern within the hot water storage tank 1, allowing the waste gas to fully contact the medium in the tank 1 for preliminary heat exchange. The waste gas flow rate is adjusted according to actual needs to ensure a sufficiently long residence time of the waste gas in the hot water storage tank 1 for efficient heat transfer. The pump body 333 is activated, and the spray liquid in the water storage tank 352 is transported to the spray plate 331 through the first conduit 332. The liquid is then evenly sprayed into the flue gas channel within the purification shell 31 through the spray nozzles. The operating frequency of the pump body 333 or the number of spray nozzles is adjusted according to the concentration and flow rate of the waste gas to ensure sufficient spray coverage area and improve the purification effect. After preliminary heat exchange, the waste gas enters the purification shell 31 through the air guide pipe 2. A flue gas channel is formed under the guidance of multiple circumferentially arranged smoke guide plates 32 inside the purification shell 31. The spray liquid is sprayed from the spray head and comes into full contact with the exhaust gas in the flue gas channel to remove particulate matter and other harmful substances. The purified gas continues to pass through the flow port 313 between the first mounting plate 311 and the second mounting plate 312 set inside the purification shell 31, and further passes through filter plates 314 of various materials to ensure that pollutants in the exhaust gas are effectively captured. The sprayed liquid flows into the water storage tank 352 through the filter end 35 connected to the bottom of the purification shell 31. The spray liquid is filtered in multiple stages by stainless steel filter screen, polypropylene filter screen and activated carbon filter screen to remove particulate matter and other impurities. The stirring end 353 in the water storage tank 352 is started, and the motor 3531 drives the shaft 3532 to rotate, which drives the stirring blade 3533 to work to ensure that the composition of the spray liquid is uniform and to prevent sedimentation and clogging problems. The purified exhaust gas is discharged outward from the duct for further processing.

[0029] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A heat recovery system based on RTO off-gas treatment, characterized in that, include: The hot water storage tank has an inlet and an outlet on its surface. The air duct is arranged in a serpentine pattern inside the hot water storage tank, with both ends extending to the outside of the hot water storage tank; The processing mechanism includes a purification shell, a smoke guide plate, and a spray component. The purification shell is connected to the air guide pipe, and multiple smoke guide plates are arranged circumferentially inside the purification shell to form a flue gas channel. The spray component is located above the purification shell and is used to spray the gas in the flue gas channel. A filter end is connected to the lower end of the purification shell. The filter end is used to filter the sprayed liquid and to provide circulating spraying for the spray component.

2. The heat recovery system based on RTO waste gas treatment according to claim 1, characterized in that: The purification shell is symmetrically arranged with a first mounting plate and a second mounting plate. The first mounting plate and the second mounting plate form a flow guiding area with the inner wall of the purification shell. Both the first mounting plate and the second mounting plate are provided with flow ports.

3. The RTO exhaust gas treatment based heat recovery system of claim 2, wherein: A flue gas passage is provided between the first mounting plate and the second mounting plate.

4. The RTO exhaust gas treatment based heat recovery system of claim 2, wherein: The flow guiding area is provided with multiple filter screens, which include any one or more of stainless steel wire mesh, glass fiber filter screen, activated carbon fiber mesh, ceramic fiber mesh and polyester fiber filter screen.

5. The RTO exhaust gas treatment based heat recovery system of claim 1, wherein: A cylindrical body is located at the center of the purification shell, and a plurality of smoke guide plates are arranged circumferentially on the outer periphery of the cylindrical body, with gaps maintained between the plurality of smoke guide plates to facilitate the flow of flue gas.

6. The RTO exhaust gas treatment based heat recovery system of claim 1, wherein: The spraying component includes a spray disc, a first conduit, a pump body, and a second conduit. The spray disc is disposed at the top of the purification shell, and the upper end of the spray disc is connected to the first conduit. The end of the first conduit is connected to the pump body, and the lower end of the pump body is connected to the second conduit. The end of the second conduit extends into the filter end.

7. The RTO exhaust gas treatment based heat recovery system of claim 6, wherein: The spray plate is equipped with several spray heads, which are used to spray the gas in the flue gas passage.

8. The RTO exhaust gas treatment based heat recovery system of claim 7, wherein: The filter end includes a filter element and a water storage tank. The purification shell is connected to the water storage tank through the filter element. The water storage tank is connected to the second conduit. The water storage tank is also equipped with a stirring end. The water storage tank is provided with a water inlet and a drain outlet on its exterior.

9. The RTO exhaust gas treatment based heat recovery system of claim 8, wherein: The filter element includes a first filter screen, a second filter screen, and a third filter screen; the first filter screen is a stainless steel filter screen, the second filter screen is a polypropylene filter screen, and the third filter screen is an activated carbon filter screen.

10. The heat recovery system based on RTO waste gas treatment according to claim 8, characterized in that: The stirring end includes a motor, a shaft, and stirring blades; the motor is located inside the water tank, the output end of the motor is connected to the shaft, and a plurality of stirring blades are connected to the shaft.

Images