Novel flue gas desulfurization device for steel rolling heating furnace

Abstract

The utility model provides a novel flue gas desulfurization device for a steel rolling heating furnace, which relates to the technical field of desulfurization devices and comprises a bottom plate, the top of the bottom plate is fixedly connected with a desulfurization tank, and the top of the desulfurization tank is fixedly communicated with an exhaust pipe. According to the utility model, under the interaction of all components of the device, the two groups of ultrasonic atomizing nozzles efficiently atomize the desulfurization liquid into extremely fine liquid drops under the driving of the water pump, so that the contact area between the desulfurization liquid and the flue gas is greatly increased, the desulfurization efficiency is improved, and meanwhile, the two groups of ultrasonic atomizing nozzles carry out double spraying on the flue gas, so that the desulfurization effect is improved. The two groups of baffle plates and the two filler layers promote deep mixing and sufficient chemical reaction of the atomized desulfurization liquid and harmful gas in the flue gas, so that effective removal of the harmful gas is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of desulfurization devices, in particular to a novel flue gas desulfurization device for a steel rolling heating furnace. Background Technique

[0002] A steel rolling heating furnace is a device used to heat steel billets to the required rolling temperature during the steel rolling production process. It generates high temperature through fuel combustion to heat the steel billets. During the combustion process, a large amount of flue gas is produced, which contains harmful substances such as sulfur oxides. If directly discharged, it will seriously pollute the environment. Therefore, a flue gas desulfurization device is needed. The flue gas desulfurization device removes sulfur oxides in the flue gas through chemical reactions and other means, making the discharged flue gas meet environmental protection standards, reducing the damage to the atmosphere, soil and ecological environment, and at the same time meeting the requirements of sustainable development, ensuring the green production and social responsibility of enterprises.

[0003] Existing novel flue gas desulfurization devices for steel rolling heating furnaces usually use a spray desulfurizer solution to remove sulfur oxides in the flue gas. However, some flue gas desulfurization devices on the market currently have poor spray uniformity and generally can only spray once. Due to this situation, the reaction between the flue gas and the desulfurization liquid is not sufficient and incomplete, which makes the treated flue gas still contain a certain amount of sulfur compound residues and fails to achieve the ideal desulfurization effect. These residual sulfur-containing compounds are discharged into the atmosphere, which will cause air pollution. Content of the Utility Model

[0004] The purpose of the utility model is to solve the problem that when the above-mentioned equipment is in use, due to the poor spray uniformity of the flue gas desulfurization device of the steel rolling heating furnace and only being able to spray once during the use process, the reaction between the flue gas and the desulfurization liquid is not sufficient, resulting in air pollution. Thus, a novel flue gas desulfurization device for a steel rolling heating furnace is proposed.

[0005] To achieve the above object, the utility model adopts the following technical scheme: a novel flue gas desulfurization device for a steel rolling heating furnace, including a bottom plate, the top of the bottom plate is fixedly connected with a desulfurization tank, the top of the desulfurization tank is fixedly communicated with an exhaust pipe, the input end of the desulfurization tank is fixedly communicated with a connecting pipe, the input end of the connecting pipe is fixedly communicated with a flue gas heat exchanger, the input end of the flue gas heat exchanger is fixedly communicated with an air inlet pipe, two embedding grooves are opened at the top of the air inlet pipe, a coarse filter screen is movably inserted into the inner surface of one of the two embedding grooves, a fine filter screen is movably inserted into the inner surface of the other of the two embedding grooves, the tops of the coarse filter screen and the fine filter screen are both fixedly connected with handles, two groups of baffle plates are fixedly connected to the inner surface of the desulfurization tank, two packing layers are fixedly connected to the inner surface of the desulfurization tank, a demister is fixedly connected to the inner surface of the desulfurization tank, an exhaust fan is fixedly inserted into the top of the desulfurization tank, two spray pipes are fixedly communicated with the outer surface of the desulfurization tank, and a group of ultrasonic atomizing nozzles are fixedly communicated with the outer surface of each of the two spray pipes.

[0006] Preferably, a conveying pipe is fixedly communicated between the input ends of the two spray pipes, and a water pump is fixedly communicated with the input end of the conveying pipe.

[0007] Preferably, a liquid outlet pipe is fixedly communicated with the input end of the water pump, and a liquid storage tank is fixedly communicated with the input end of the liquid outlet pipe.

[0008] Preferably, a driving motor is fixedly connected to the top of the liquid storage tank, and the output end of the driving motor movably penetrates into the interior of the liquid storage tank.

[0009] Preferably, a stirring rod is fixedly connected to the output end of the driving motor.

[0010] Preferably, an installation ring is fixedly sleeved on the outer surface of the stirring rod.

[0011] Preferably, three stirring blades are fixedly connected to the outer surface of the installation ring.

[0012] Compared with the prior art, the advantages and positive effects of the utility model are as follows.

[0013] 1. In the present utility model, under the interaction of the components of the device, driven by a water pump, two ultrasonic atomizing nozzles efficiently atomize the desulfurization liquid into extremely fine droplets, thereby greatly increasing the contact area between the desulfurization liquid and the flue gas, improving the desulfurization efficiency. At the same time, the two ultrasonic atomizing nozzles spray the flue gas doubly, effectively enhancing the penetration and coverage of the desulfurization liquid on the flue gas, further improving the desulfurization effect. In addition, two baffle plates and two packing layers promote the deep mixing and full chemical reaction of the atomized desulfurization liquid and the harmful gases in the flue gas, ensuring the effective removal of harmful gases. Before the flue gas enters the desulfurization system, a cooling device integrating a coarse filter, a fine filter and a flue gas heat exchanger is also installed. These pretreatment steps effectively remove the large particles in the flue gas and reduce the flue gas temperature, creating more favorable conditions for subsequent desulfurization treatment.

[0014] 2. In the present utility model, under the interaction of the components of the device, the drive motor efficiently drives the rotation of three stirring blades to comprehensively and evenly stir the desulfurization liquid in the liquid storage tank. This process effectively promotes the full mixing of the components in the desulfurization liquid, prevents the formation and accumulation of precipitates, thereby ensuring the uniformity and stability of the desulfurization liquid during use and laying a solid foundation for subsequent desulfurization treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the main view three-dimensional structure diagram of a novel flue gas desulfurization device for a steel rolling heating furnace proposed by the present utility model;

[0016] Figure 2 is the three-dimensional split view of part of the structure of a novel flue gas desulfurization device for a steel rolling heating furnace proposed by the present utility model;

[0017] Figure 3 is the sectional three-dimensional split view of part of the structure of a novel flue gas desulfurization device for a steel rolling heating furnace proposed by the present utility model;

[0018] Figure 4 is the side view three-dimensional split view of part of the structure of a novel flue gas desulfurization device for a steel rolling heating furnace proposed by the present utility model.

[0019] LEGEND DESCRIPTION:

[0020] 1. Bottom plate; 2. Desulfurization tank; 3. Exhaust pipe; 4. Connecting pipe; 5. Flue gas heat exchanger; 6. Inlet pipe; 7. Embedded groove; 8. Coarse filter; 9. Fine filter; 10. Handle; 11. Baffle plate; 12. Packing layer; 13. Demister; 14. Exhaust fan; 15. Spray pipe; 16. Ultrasonic atomizing nozzle; 17. Delivery pipe; 18. Water pump; 19. Outlet pipe; 20. Liquid storage tank; 21. Drive motor; 22. Stirring rod; 23. Installation ring; 24. Stirring blade. Detailed implementation mode

[0021] In order to more clearly understand the above objects, features and advantages of the present utility model, the following further describes the present utility model with reference to the drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0022] In the following description, many specific details are set forth in order to fully understand the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Therefore, the present utility model is not limited by the limitations of the specific embodiments disclosed in the following specification.

[0023] Embodiment 1, as Figures 1-4 shown, the present utility model provides a novel flue gas desulfurization device for a steel rolling heating furnace, including a bottom plate 1. A desulfurization tank 2 is fixedly connected to the top of the bottom plate 1. An exhaust pipe 3 is fixedly communicated with the top of the desulfurization tank 2. A connecting pipe 4 is fixedly communicated with the input end of the desulfurization tank 2. A flue gas heat exchanger 5 is fixedly communicated with the input end of the connecting pipe 4. An air inlet pipe 6 is fixedly communicated with the input end of the flue gas heat exchanger 5. Two embedding grooves 7 are opened at the top of the air inlet pipe 6. A coarse filter screen 8 is movably inserted into the inner surface of one of the two embedding grooves 7. A fine filter screen 9 is movably inserted into the inner surface of the other of the two embedding grooves 7. Handles 10 are fixedly connected to the tops of the coarse filter screen 8 and the fine filter screen 9. Two groups of baffle plates 11 are fixedly connected to the inner surface of the desulfurization tank 2. Two packing layers 12 are fixedly connected to the inner surface of the desulfurization tank 2. A demister 13 is fixedly connected to the inner surface of the desulfurization tank 2. An exhaust fan 14 is fixedly inserted into the top of the desulfurization tank 2. Two spray pipes 15 are fixedly communicated with the outer surface of the desulfurization tank 2. A group of ultrasonic atomizing nozzles 16 are fixedly communicated with the outer surface of each of the two spray pipes 15.

[0024] The effects achieved by the entire Embodiment 1 are as follows: The flue gas first enters the intake pipe 6. During this process, the coarse filter screen 8 mainly performs the task of preliminary filtration, removing larger particulate matters and impurities in the flue gas to reduce the burden on subsequent treatment equipment. Subsequently, the fine filter screen 9 further conducts fine filtration on the tiny particulate matters in the flue gas, effectively intercepting these fine pollutants, thereby further reducing the pressure in the subsequent desulfurization process. The preliminarily filtered flue gas then enters the flue gas heat exchanger 5. This device utilizes the principle of heat exchange to dissipate heat and cool the flue gas through the heat transfer between water and the high-temperature flue gas, creating more favorable temperature conditions for the subsequent desulfurization process and improving the desulfurization efficiency. Subsequently, the cooled flue gas smoothly enters the desulfurization tank 2 through the connecting pipe 4. Inside the desulfurization tank 2, first, the exhaust fan 14 is started to create a negative pressure environment, guiding the flue gas to flow towards the exhaust pipe 3. At the same time, the water pump 18 is started. This pump extracts the desulfurization liquid from the liquid storage tank 20 and pressurizes it. Subsequently, the desulfurization liquid is transported to the two spray pipes 15 through the delivery pipe 17. Under the action of the two groups of ultrasonic atomizing nozzles 16, the desulfurization liquid is highly atomized into tiny droplets. These droplets can more fully contact the harmful gases such as sulfur dioxide in the flue gas and undergo chemical reactions, thereby more efficiently removing these pollutants. And through two spraying processes, it is ensured that the desulfurization liquid is fully mixed and reacted with the flue gas. In addition, the two groups of baffle plates 11 use their baffle structures to change the flow direction of the flue gas, increasing the residence time of the flue gas in the desulfurization tank 2 and improving the desulfurization efficiency. And the two packing layers 12, because their interiors are filled with ceramic materials with a large specific surface area and good adsorption performance, can further promote the in-depth reaction between the atomized desulfurization liquid and the harmful gases in the flue gas, ensuring that the desulfurization effect is more thorough. Finally, the gas after desulfurization treatment enters the demister 13. When the mist-containing gas flows through the demister 13, the mist droplets collide with components such as the corrugated plates and blades inside the demister 13 due to inertia. The larger droplets naturally fall under the action of gravity. At the same time, the material surface of the demister 13 adsorbs the tiny mist droplets by virtue of its special properties. In this way, the droplets and tiny particulate matters entrained in the gas can be effectively removed, thereby ensuring that the finally discharged gas meets the environmental protection standards and achieving up-to-standard emission.

[0025] Embodiment 2 is as Figures 2-4 shown, there is a fixed communication between the input ends of the two spray pipes 15 through a delivery pipe 17. The input end of the delivery pipe 17 is fixedly communicated with a water pump 18. The input end of the water pump 18 is fixedly communicated with a liquid outlet pipe 19. The input end of the liquid outlet pipe 19 is fixedly communicated with a liquid storage tank 20. The top of the liquid storage tank 20 is fixedly connected with a driving motor 21, and the output end of the driving motor 21 movably penetrates inside the liquid storage tank 20. The output end of the driving motor 21 is fixedly connected with a stirring rod 22. Three stirring blades 24 are fixedly sleeved on the outer surface of the stirring rod 22.

[0026] The effect achieved by the entire Embodiment 2 is as follows. First, an appropriate amount of desulfurization liquid is injected into the liquid storage tank 20. During the spraying process, in order to prevent phenomena such as precipitation, stratification, or uneven concentration of the desulfurization liquid due to long-term static state, the staff can start the driving motor 21 in a timely manner. The output end of the driving motor 21 drives the stirring rod 22 to rotate, and the stirring rod 22 further drives the three stirring blades 24 thereon to rotate at a certain speed and trajectory. This stirring action can effectively break the static state inside the desulfurization liquid, promote the uniform mixing of each component in the desulfurization liquid, prevent the formation and accumulation of precipitates, and maintain the uniformity and stability of the desulfurization liquid. At the same time, stirring also helps to accelerate the chemical reaction rate in the desulfurization liquid and improve the desulfurization efficiency.

[0027] Working principle: When in use, the first step is to inject an appropriate amount of prepared desulfurization liquid into the liquid storage tank 20. Subsequently, the exhaust end of the steel rolling heating furnace is closely connected to the intake pipe 6 to ensure smooth introduction of flue gas into the desulfurization system. At this time, start the drive motor 21, whose output shaft drives the stirring rod 22 to rotate, thereby driving the three stirring blades 24 to carry out efficient stirring. This process aims to maintain the uniformity and activity within the desulfurization liquid, prevent precipitation or uneven concentration caused by long-term static state, and ensure the consistency of the desulfurization effect. When the system is ready for desulfurization operation, the flue gas first enters through the intake pipe 6. At this time, the coarse filter screen 8 serves as the first line of defense, effectively intercepting and removing large particulate matter and impurities in the flue gas, while the fine filter screen 9 further finely filters the tiny particulate matter in the flue gas, significantly reducing its content, thus reducing the burden on the subsequent treatment unit. The preliminarily purified flue gas then enters the flue gas heat exchanger 5. This device uses the principle of heat exchange to transfer the heat energy of the flue gas to the cooling water, realizing the cooling of the flue gas and creating more favorable temperature conditions for the subsequent desulfurization reaction. The cooled flue gas smoothly enters the desulfurization tank 2 through the connecting pipe 4. At this time, start the exhaust fan 14, thereby creating a negative pressure environment inside the desulfurization tank 2, effectively guiding the flue gas to flow upward from bottom to top in the desulfurization tank 2. At the same time, the staff starts the water pump 18 through the control system. The water pump 18 extracts the desulfurization liquid from the liquid storage tank 20 and pressurizes it to transport it to the two spray pipes 15. Under the action of the two groups of ultrasonic atomizing nozzles 16, the desulfurization liquid is highly atomized into tiny droplets. The contact area between these droplets and the flue gas is significantly increased, thereby promoting the chemical reaction and physical adsorption process between the two, improving the desulfurization efficiency. The two-stage spray design ensures sufficient contact and reaction between the flue gas and the desulfurization liquid, further enhancing the desulfurization effect. Inside the desulfurization tank 2, the two groups of baffle plates 11 change the flow path of the flue gas with their unique structure, causing the flue gas to form multiple baffle flows and turbulences in the tank. This not only helps to improve the mixing uniformity of the desulfurization liquid and the flue gas but also prolongs their contact time. In addition, the two packing layers 12 are filled with ceramic materials with a large specific surface area and good adsorption performance, which can further promote the in-depth contact and chemical reaction between the atomized desulfurization liquid and the harmful gases in the flue gas, ensuring the thoroughness and high efficiency of the desulfurization process. Finally, the gas that has undergone comprehensive desulfurization treatment enters the demister 13. The demister 13 effectively intercepts and removes the tiny droplets and residual particulate matter carried in the gas through the filter screen or fiber layer structure inside it, ensuring that the finally discharged gas meets the environmental protection standards and emission requirements.

[0028] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution content of the present utility model still belong to the protection scope of the technical solution of the present utility model.

Claims

1. A novel flue gas desulfurization device for a steel rolling heating furnace, comprising a bottom plate (1), characterized in that: The top of the bottom plate (1) is fixedly connected with a desulfurization tank (2). The top of the desulfurization tank (2) is fixedly communicated with an exhaust pipe (3). The input end of the desulfurization tank (2) is fixedly communicated with a connecting pipe (4). The input end of the connecting pipe (4) is fixedly communicated with a flue gas heat exchanger (5). The input end of the flue gas heat exchanger (5) is fixedly communicated with an intake pipe (6). Two embedding grooves (7) are formed in the top of the intake pipe (6). A coarse filter screen (8) is movably inserted into the inner surface of one of the two embedding grooves (7). A fine filter screen (9) is movably inserted into the inner surface of the other one of the two embedding grooves (7). Handles (10) are fixedly connected to the tops of the coarse filter screen (8) and the fine filter screen (9). Two groups of baffle plates (11) are fixedly connected to the inner surface of the desulfurization tank (2). Two packing layers (12) are fixedly connected to the inner surface of the desulfurization tank (2). A demister (13) is fixedly connected to the inner surface of the desulfurization tank (2). An exhaust fan (14) is fixedly inserted into the top of the desulfurization tank (2). Two spray pipes (15) are fixedly communicated with the outer surface of the desulfurization tank (2). A group of ultrasonic atomizing nozzles (16) are fixedly communicated with the outer surfaces of the two spray pipes (15).

2. The novel flue gas desulfurization device for a steel rolling heating furnace according to claim 1, characterized in that: A delivery pipe (17) is fixedly communicated between the input ends of the two spray pipes (15). The input end of the delivery pipe (17) is fixedly communicated with a water pump (18).

3. The novel flue gas desulfurization device for a steel rolling heating furnace according to claim 2, wherein: The input end of the water pump (18) is fixedly communicated with a liquid outlet pipe (19). The input end of the liquid outlet pipe (19) is fixedly communicated with a liquid storage tank (20).

4. A novel flue gas desulfurization device for a steel rolling heating furnace according to claim 3, characterized in that: A driving motor (21) is fixedly connected to the top of the liquid storage tank (20), and the output end of the driving motor (21) movably penetrates into the interior of the liquid storage tank (20).

5. A novel flue gas desulfurization device for a steel rolling heating furnace according to claim 4, characterized in that: The output end of the driving motor (21) is fixedly connected with a stirring rod (22).

6. The novel flue gas desulfurization device for a steel rolling heating furnace according to claim 5, wherein: An installation ring (23) is fixedly sleeved on the outer surface of the stirring rod (22).

7. A novel flue gas desulfurization device for a steel rolling heating furnace according to claim 6, characterized in that: Three stirring blades (24) are fixedly connected to the outer surface of the installation ring (23).

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