Flue gas purification device of desulfurization tower

Abstract

The utility model discloses a flue gas purification device of a desulfurizing tower, which comprises a tower body, a flue gas inlet is arranged at the lower part of one side of the tower body, a purified gas outlet is arranged at the top of the tower body, a gas collector is arranged at the upper part of the inner side of the tower body and is close to the purified gas outlet, and the gas collector is fixedly connected with the inner wall of the tower body through a support rod. According to the flue gas purification device for the desulfurizing tower, a high-efficiency circulating purification mechanism is realized by arranging the gas collector and the circulating pipeline, the gas component state is detected in real time by virtue of the intelligent sensor which is arranged in the gas collector and is electrically connected with the PLC control module outside the tower body, and a preset sulfur dioxide concentration threshold value of 50mg / m < 3 > is taken as a basis; when the gas exceeds the standard, the control module starts the circulating fan to enable the gas not reaching the standard to return to the tower for re-purification, and when the gas reaches the standard, the fan stops, so that the purification process is accurately controlled, the purification efficiency is improved, the purification strategy is adjusted, the final discharged gas is ensured to stably reach the standard, and the adaptability to different flue gas conditions is enhanced.

Description

Technical Field

[0001] This utility model relates to the technical field of flue gas purification devices, and in particular to a flue gas purification device for desulfurization towers. Background Technology

[0002] During industrial production, the emission of large amounts of sulfur-containing flue gas causes serious environmental pollution. Traditional desulfurization tower flue gas purification devices have certain limitations in terms of purification efficiency. On the one hand, some devices cannot ensure that the flue gas and desulfurizing agent react fully, resulting in the purified flue gas still containing high concentrations of pollutants such as sulfur dioxide, which cannot meet increasingly stringent environmental emission standards. On the other hand, existing devices lack effective real-time monitoring and feedback adjustment mechanisms, and cannot optimize the purification process in a timely manner according to changes in flue gas composition, resulting in unstable purification effects.

[0003] Therefore, we propose a flue gas purification device for desulfurization towers. Utility Model Content

[0004] The main purpose of this utility model is to provide a flue gas purification device for desulfurization towers. In order to prevent environmental pollution and unstable purification effect caused by substandard purification of sulfur-containing flue gas, this device can improve flue gas purification efficiency, meet environmental emission standards and stabilize the purification effect, and effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A desulfurization tower flue gas purification device includes a tower body, a flue gas inlet located at the lower part of one side of the tower body, a clean gas outlet located at the top of the tower body, a gas collector located at the upper inner side of the tower body near the clean gas outlet, and the gas collector being fixedly connected to the inner wall of the tower body by a support rod, and a sealing umbrella being provided between the lower outer side of the gas collector and the inner wall of the tower body, the top of the sealing umbrella having a plurality of equally spaced reinforcing ribs arranged in a ring array;

[0007] The gas collector has an air inlet at the bottom and an air outlet at the top. A smart sensor is fixedly installed on the inner wall of the gas collector. Multiple equidistant air extraction ports are arranged in a circular array on the inner wall of the gas collector above the smart sensor. An air chamber connected to the air extraction ports is opened inside the gas collector.

[0008] A circulation pipe is provided on one side of the tower body. One end of the circulation pipe is fixedly connected to the interior of the tower body near the lower part and is located above the flue gas inlet. The other end of the circulation pipe extends to the interior of the tower body near the upper part and is connected to the gas chamber. A one-way ventilation mechanism is provided inside the circulation pipe. A circulation fan is fixedly installed inside the circulation pipe and is located above the one-way ventilation mechanism.

[0009] By adopting the above technical solution, sulfur-containing flue gas enters the desulfurization tower from the flue gas inlet at the bottom of one side of the tower body. Inside the tower body, the flue gas reacts with the internal desulfurizing agent and other substances to begin the initial desulfurization and purification process. As the flue gas rises, impurities and some unreacted components are gradually removed.

[0010] The purified flue gas moves upward and reaches the gas collector at the upper part of the tower body near the clean gas outlet. The gas enters the collector through the air inlet at the bottom of the gas collector. The sealing umbrella can prevent gas from leaking from the gap between the gas collector and the inner wall of the tower body, and the reinforcing ribs can enhance the structural strength of the sealing umbrella.

[0011] The composition and state of the gas entering the gas collector are detected by smart sensors fixedly installed on the inner wall. The sensors can detect various parameters such as sulfur dioxide concentration, particulate matter content, and humidity to determine whether the flue gas meets the emission standards. If the gas is not completely purified and meets the standards, the circulating fan is activated. The circulating fan is located inside the circulating pipe, with one end of the circulating pipe connected to the bottom of the tower near the flue gas inlet, and the other end extending to the top of the tower and connecting to the gas chamber inside the gas collector. When the circulating fan is working, with the cooperation of the one-way ventilation mechanism, the gas in the gas collector is sent back to the bottom of the tower through the exhaust port, the gas chamber, and the circulating pipe, so that the gas participates in the purification process again, thereby improving the purification effect.

[0012] Once the smart sensor detects that the gas meets the emission standards, the purified gas is discharged from the outlet at the top of the gas collector and leaves the desulfurization tower through the clean gas outlet.

[0013] Furthermore, the one-way ventilation mechanism includes a tension spring bracket fixedly disposed on the inner surface of the circulation pipe, a one-way blocking ring fixedly disposed on the inner surface of the circulation pipe below the tension spring bracket, a central ring hole being formed at the center of the one-way blocking ring, a one-way blocking ball being movably disposed below the one-way blocking ring, the diameter of the one-way blocking ball being larger than the diameter of the central ring hole, and a reset holding spring connecting the bottom end of the tension spring bracket and the top end of the one-way blocking ball.

[0014] By adopting the above technical solution, when the circulating fan starts and the gas in the gas collector needs to return to the lower part of the tower body for recirculation and purification through the circulating pipe, the pressure generated by the gas flowing in the pipe pushes the one-way plug ball downward. At this time, the gas pressure overcomes the tension of the reset holding spring, causing the one-way plug ball to leave the central ring hole of the one-way plug ring. The gas can then pass smoothly through the central ring hole and flow along the circulating pipe to the lower part of the tower body, thereby realizing the recycling of gas.

[0015] When the circulating fan is not working or the gas pressure inside the tower near the bottom is greater than the gas pressure in the circulating pipe, the one-way blocking ball moves upward under the tension of the reset holding spring, tightly blocking the central ring hole of the one-way blocking ring. Since the diameter of the one-way blocking ball is larger than the diameter of the central ring hole, the gas inside the tower cannot enter the circulating pipe through the central ring hole, thus effectively preventing gas backflow and ensuring that the gas flow direction in the circulating pipe is one-way from the gas collector to the bottom of the tower, as designed.

[0016] Furthermore, a water tank is provided on the lower part of one side of the tower body, and the water tank is connected to the lower part of the tower body. A dosing tank is provided on the side of the tower body near the water tank, and a water supply pipe is connected between the lower part of one side of the dosing tank and the upper part of one side of the water tank.

[0017] By adopting the above technical solution, the water tank located at the lower part of one side of the tower body is connected to the lower part of the tower body. Its main function is to provide liquid medium for the desulfurization process. The dosing tank is used to store desulfurization agents. When it is necessary to add agents to the desulfurization system, the agents flow from the lower part of one side of the dosing tank into the upper part of one side of the water tank through the water pipe. This design allows the agents to be mixed in the liquid in the water tank after flowing into it.

[0018] Furthermore, a circulating water pump is fixedly installed on one side of the outer wall of the water tank, and a water suction pipe is fixedly connected to the suction end of the circulating water pump. The end of the water suction pipe away from the circulating water pump is connected to the lower part of one side of the water tank.

[0019] By adopting the above technical solution, the circulating water pump is mainly used to provide power so that the liquid in the water tank can be recycled in the desulfurization tower system. During the desulfurization process, especially wet desulfurization, after the liquid comes into contact with the flue gas, it absorbs pollutants such as sulfur dioxide. The properties and composition of some liquids change. In order to carry out desulfurization continuously and effectively, these liquids need to be transported back to a suitable location for treatment or participate in the desulfurization reaction again. One end of the pumping pipe is connected to the lower side of the water tank. This position is designed to facilitate the extraction of liquid from the water tank. The circulating water pump extracts the liquid from the water tank through the pumping pipe connected to its suction end under the suction force generated by its own operation.

[0020] Furthermore, a drain pipe is fixedly installed at the discharge end of the circulating water pump, and two spray pipes are fixedly installed on one side of the drain pipe. The ends of the two spray pipes away from the drain pipe extend into the tower body, and multiple equally spaced nozzles are fixedly installed at their bottom ends.

[0021] By adopting the above technical solution, when the circulating water pump is working, it draws liquid containing desulfurization agents from the water tank and pumps it into the drain pipe through its discharge end. The drain pipe serves to transport the liquid, guiding it to a suitable location for subsequent spraying operations. When the liquid reaches the drain pipe, two spray pipes are fixedly installed on one side of the drain pipe, causing the liquid to be diverted into these two spray pipes. The two spray pipes further guide the liquid away from the drain pipe and extend it into the tower body. Multiple spray nozzles are installed at the bottom of the spray pipes. The nozzles are arranged at a distance. When the liquid reaches the nozzle, it is sprayed out in the form of a mist. In the desulfurization tower, the sprayed liquid droplets can fully contact the sulfur-containing flue gas entering the tower from the flue gas inlet. As the flue gas flows upward, the droplets sprayed from the nozzles are pushed downward by gravity and come into countercurrent contact with the flue gas. The desulfurization agents in the droplets, such as limestone slurry, react chemically with pollutants such as sulfur dioxide in the flue gas, thereby purifying the flue gas. This large-area spraying can increase the contact area between the liquid and the flue gas and improve the desulfurization efficiency.

[0022] Furthermore, two mesh panels are provided on the inner middle part of the tower body, and the two mesh panels are located below the corresponding water spray pipes.

[0023] By adopting the above technical solution, when the liquid sprayed from the nozzle comes into contact with the flue gas, a gas-liquid mixture will occur. When the gas-liquid mixture flows through the screen plate, due to the presence of the screen plate, the liquid separates from the flue gas under its own gravity and the interception effect of the screen plate. The screen plate acts like a filter, allowing the flue gas to continue to flow upward, while the liquid will accumulate on the screen plate. This gas-liquid separation process is very important because if a large amount of liquid flows upward with the flue gas, it may affect the subsequent gas collection and purification effect, and may also cause corrosion or other problems to the equipment. In some desulfurization systems, if the liquid is entrained by the flue gas into the gas collector or subsequent pipelines, it may cause blockage or interfere with the normal operation of the sensors.

[0024] The liquid collected on the screen will flow downwards under the influence of gravity. Since the screen is located below the spray pipe, the collected liquid can return to the bottom area of ​​the tower and then be transported back to the nozzles for spraying through equipment such as water tanks and circulating water pumps, thus realizing the recycling of liquid. This not only improves the utilization rate of liquid and reduces the waste of water resources and desulfurization agents, but also ensures the continuous and stable operation of the desulfurization process.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] (1) The flue gas purification device for desulfurization tower of this utility model realizes a highly efficient circulation purification mechanism by setting up a gas collector and circulation pipeline. The intelligent sensor is installed in the gas collector and is electrically connected to the PLC control module outside the tower. The control module presets the sulfur dioxide concentration threshold (e.g., 50 mg / m³). 3 The intelligent sensor detects the gas composition and state in real time. When the detected value exceeds the threshold, the control module sends a signal to start the circulating fan. With the cooperation of the one-way ventilation mechanism, the gas that has not been completely purified and meets the standards in the gas collector is sent back to the lower part of the tower body so that it can participate in the purification process again. When the detected value meets the standard, the circulating fan automatically stops. This mechanism effectively avoids the direct discharge of incompletely purified gas, significantly improves the purification effect of the desulfurization tower on sulfur-containing flue gas, and ensures that the final discharged gas can stably meet the emission standards.

[0027] (2) The flue gas purification device of the desulfurization tower of this utility model has advanced real-time monitoring and intelligent control functions. The inner wall of the gas collector is fixedly installed with intelligent sensors, which can detect the composition and state of the gas entering the collector in real time, such as sulfur dioxide concentration, particulate matter content, humidity and other parameters. The intelligent sensors are electrically connected to the PLC control module outside the tower body. The control module presets the sulfur dioxide concentration threshold (e.g., 50 mg / m³). 3 According to the detection results, when the sulfur dioxide concentration exceeds the threshold, the control module sends a signal to automatically start the circulating fan. When the detection value meets the standard, the circulating fan stops, thereby achieving precise control of the purification process. This function not only improves the purification efficiency, but also allows for flexible adjustment of the purification strategy according to the actual working conditions, enhancing the adaptability of the device to different flue gas conditions. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the desulfurization tower flue gas purification device of this utility model.

[0029] Figure 2 This utility model relates to a desulfurization tower flue gas purification device. Figure 1 Enlarged view of point A in the middle.

[0030] Figure 3 This is a schematic diagram of the internal structure of the gas collector in the desulfurization tower flue gas purification device of this utility model.

[0031] In the diagram: 1. Tower body; 2. Flue gas inlet; 3. Clean gas outlet; 4. Gas collector; 5. Sealing umbrella; 6. Reinforcing rib; 7. Air inlet; 8. Air outlet; 9. Smart sensor; 10. Air extraction port; 11. Gas chamber; 12. Circulation pipe; 13. Tension spring bracket; 14. One-way plug ring; 15. Central ring hole; 16. One-way plug ball; 17. Reset tension spring; 18. Circulation fan; 19. Mesh plate; 20. Support rod; 21. Water tank; 22. Chemical dosing tank; 23. Water filling pipe; 24. Circulation water pump; 25. Water extraction pipe; 26. Drainage pipe; 27. Spray pipe; 28. Nozzle. Detailed Implementation

[0032] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0033] To prevent environmental pollution and unstable purification effects caused by substandard sulfur-containing flue gas purification, and to improve flue gas purification efficiency, meet environmental emission standards, and stabilize purification results, such as... Figure 1 , Figure 2 , Figure 3 As shown, the desulfurization tower flue gas purification device includes a tower body 1. A flue gas inlet 2 is provided on the lower part of one side of the tower body 1, and a clean gas outlet 3 is provided on the top of the tower body 1. A gas collector 4 is provided on the upper inner side of the tower body 1 and near the clean gas outlet 3. The gas collector 4 is fixedly connected to the inner wall of the tower body 1 by a support rod 20. A sealing umbrella 5 is provided between the lower outer side of the gas collector 4 and the inner wall of the tower body 1. The top of the sealing umbrella 5 has a ring array of multiple equidistant reinforcing ribs 6.

[0034] The gas collector 4 has an air inlet 7 at its bottom and an air outlet 8 at its top. A smart sensor 9 is fixedly installed on the inner wall of the gas collector 4. Multiple equidistant air extraction ports 10 are arranged in a circular array on the inner wall of the gas collector 4 and above the smart sensor 9. An air chamber 11 is opened inside the gas collector 4 and communicates with the air extraction ports 10.

[0035] A circulation pipe 12 is provided on one side of the tower body 1. One end of the circulation pipe 12 is fixedly connected to the interior of the tower body 1 near the lower position and is located above the flue gas inlet 2. The other end of the circulation pipe 12 extends to the interior of the tower body 1 near the upper position and is connected to the gas chamber 11. A one-way ventilation mechanism is provided inside the circulation pipe 12. A circulation fan 18 is fixedly installed inside the circulation pipe 12 and is located above the one-way ventilation mechanism.

[0036] When in use, sulfur-containing flue gas enters the desulfurization tower from the flue gas inlet 2 at the bottom of one side of the tower body 1. Inside the tower, the flue gas reacts with the desulfurizing agent and other substances inside, starting the initial desulfurization and purification process. As the flue gas rises, impurities and some unreacted components are gradually removed.

[0037] The purified flue gas moves upward and reaches the gas collector 4 on the upper inner side of the tower body 1, near the clean gas outlet 3. The gas enters the collector through the air inlet 7 at the bottom of the gas collector 4. The sealing umbrella 5 can prevent the gas from leaking from the gap between the gas collector 4 and the inner wall of the tower body 1. The reinforcing rib 6 plays a role in enhancing the structural strength of the sealing umbrella 5.

[0038] The composition and state of the gas entering the gas collector 4 are detected by the intelligent sensor 9 fixedly installed on the inner wall. The sensor can detect various parameters such as sulfur dioxide concentration, particulate matter content, and humidity to determine whether the flue gas meets the emission standards. If the gas is detected as not being completely purified, the circulating fan 18 is started. The circulating fan 18 is located inside the circulating pipe 12, and one end of the circulating pipe 12 is connected to the bottom of the tower body 1 above the flue gas inlet 2. The other end extends to the top of the tower body 1 and is connected to the air chamber 11 inside the gas collector 4. When the circulating fan 18 is working, with the cooperation of the one-way ventilation mechanism, the gas in the gas collector 4 is sent back to the bottom of the tower body 1 through the exhaust port 10, the air chamber 11 and the circulating pipe 12, so that the gas participates in the purification process again, thereby improving the purification effect.

[0039] When the intelligent sensor 9 detects that the gas meets the emission standards, the purified gas is discharged from the outlet 8 at the top of the gas collector 4 and leaves the desulfurization tower through the clean gas outlet 3.

[0040] For example, such as Figure 2 As shown, the present invention also includes a one-way ventilation mechanism comprising a tension spring bracket 13 fixedly disposed on the inner surface of the circulation pipe 12, a one-way blocking ring 14 fixedly disposed on the inner surface of the circulation pipe 12 below the tension spring bracket 13, a central ring hole 15 formed at the center of the one-way blocking ring 14, a one-way blocking ball 16 movably disposed below the one-way blocking ring 14, the diameter of the one-way blocking ball 16 being larger than the diameter of the central ring hole 15, and a reset holding spring 17 connected between the bottom end of the tension spring bracket 13 and the top end of the one-way blocking ball 16.

[0041] When in use, when the circulating fan 18 is started, and the gas in the gas collector 4 needs to return to the interior of the tower body 1 near the lower position for recirculation and purification through the circulating pipe 12, the pressure generated by the gas flowing in the pipe pushes the one-way plug ball 16 downward. At this time, the gas pressure overcomes the tension of the reset holding spring 17, causing the one-way plug ball 16 to leave the central ring hole 15 of the one-way plug ring 14, and the gas can pass smoothly through the central ring hole 15 and flow along the circulating pipe 12 to the interior of the tower body 1 at the lower position, thereby realizing the recycling of gas.

[0042] When the circulating fan 18 is not working or the gas pressure inside the tower body 1 near the bottom is greater than the gas pressure inside the circulating pipe 12, under the pulling force of the reset holding spring 17, the one-way blocking ball 16 moves upward and tightly blocks the central annular hole 15 of the one-way blocking ring 14. Since the diameter of the one-way blocking ball 16 is larger than the diameter of the central annular hole 15, the gas inside the tower body 1 cannot enter the circulating pipe 12 through the central annular hole 15, thereby effectively preventing gas backflow and ensuring that the gas flow direction in the circulating pipe 12 is one-way flow from the gas collector 4 to the bottom of the tower body 1 as designed.

[0043] For example, such as Figure 1 As shown, the present invention also includes a water tank 21 provided on the lower part of one side of the tower body 1, and the water tank 21 is connected to the lower part of the tower body 1. A dosing tank 22 is provided on the side of the tower body 1 near the water tank 21. A water supply pipe 23 is connected between the lower part of one side of the dosing tank 22 and the upper part of one side of the water tank 21.

[0044] During use, the water tank 21 located at the lower part of one side of the tower body 1 is connected to the lower part of the tower body 1. Its main function is to provide liquid medium for the desulfurization process. The dosing tank 22 is used to store desulfurization agents. When it is necessary to add agents to the desulfurization system, the agents flow from the lower part of one side of the dosing tank 22 into the upper part of one side of the water tank 21 through the water pipe 23. This design allows the agents to be mixed in the liquid in the water tank 21 after flowing into it.

[0045] For example, such as Figure 1 As shown, the present invention also includes a circulating water pump 24 fixedly installed on one side of the outer wall of the water tank 21, a water suction pipe 25 fixedly connected to the suction end of the circulating water pump 24, and the end of the water suction pipe 25 away from the circulating water pump 24 connected to the lower part of one side of the water tank 21.

[0046] During use, the circulating water pump 24 is mainly used to provide power so that the liquid in the water tank 21 can be recycled in the desulfurization tower system. During the desulfurization process, especially wet desulfurization, after the liquid comes into contact with the flue gas, it absorbs pollutants such as sulfur dioxide. The properties and composition of some liquids change. In order to carry out desulfurization continuously and effectively, these liquids need to be transported back to a suitable location for treatment or participate in the desulfurization reaction again. One end of the pumping pipe 25 is connected to the lower side of the water tank 21. This position is designed to facilitate the extraction of liquid from the water tank 21. The circulating water pump 24 extracts the liquid from the water tank 21 through the pumping pipe 25 connected to its suction end under the suction force generated by its own operation.

[0047] For example, such as Figure 1 As shown, the present invention also includes a drain pipe 26 fixedly installed at the discharge end of the circulating water pump 24, and two spray pipes 27 fixedly installed on one side of the drain pipe 26. The ends of the two spray pipes 27 away from the drain pipe 26 extend into the tower body 1, and multiple nozzles 28 arranged at equal intervals are fixedly installed at their bottom ends.

[0048] During operation, the circulating water pump 24 draws liquid containing desulfurization agents from the water tank 21 through its discharge end and pumps it into the drain pipe 26. The drain pipe 26 serves to transport the liquid, guiding it to a suitable location for subsequent spraying operations. Upon reaching the drain pipe 26, two spray pipes 27 are fixedly installed on one side of the drain pipe 26, causing the liquid to be diverted into these two spray pipes 27. The two spray pipes 27 further guide the liquid away from the drain pipe 26 and extend it into the tower body 1. A spray pipe 27 is installed at its bottom end... Multiple equally spaced nozzles 28 spray out liquid in the form of a mist when it reaches the nozzles 28. In the desulfurization tower, the sprayed liquid droplets can fully contact the sulfur-containing flue gas entering the tower body 1 from the flue gas inlet 2. When the flue gas flows upward, the droplets sprayed from the nozzles 28 are pushed downward by gravity and come into countercurrent contact with the flue gas. The desulfurization agents in the droplets, such as limestone slurry, react chemically with pollutants such as sulfur dioxide in the flue gas, thereby purifying the flue gas. This large-area spraying can increase the contact area between the liquid and the flue gas and improve the desulfurization efficiency.

[0049] For example, such as Figure 1 As shown, the present invention also includes two mesh plates 19 disposed in the middle of the inner side of the tower body 1, and the two mesh plates 19 are located below the corresponding water spray pipes 27.

[0050] When the liquid sprayed from nozzle 28 comes into contact with the flue gas, a gas-liquid mixture will occur. As the gas-liquid mixture flows through the mesh plate 19, due to the presence of the mesh plate 19, the liquid separates from the flue gas under its own gravity and the interception effect of the mesh plate 19. The mesh plate 19 acts like a filter, allowing the flue gas to continue to flow upward, while the liquid will accumulate on the mesh plate 19. This gas-liquid separation process is very important because if a large amount of liquid flows upward with the flue gas, it may affect the subsequent gas collection and purification effect, and may also cause corrosion or other problems to the equipment. In some desulfurization systems, if the liquid is carried into the gas collector or subsequent pipeline by the flue gas, it may cause blockage or interfere with the normal operation of the sensor.

[0051] The liquid collected on the mesh plate 19 will flow downward under the action of gravity. Since the mesh plate 19 is located below the water spray pipe 27, the collected liquid can return to the bottom area of ​​the tower body 1, and then be transported to the spray nozzle 28 for spraying again through the water tank 21 and circulating water pump 24, etc., to realize the recycling of liquid. This not only improves the utilization rate of liquid and reduces the waste of water resources and desulfurization agents, but also ensures the continuous and stable operation of the desulfurization process.

[0052] It should be noted that this utility model is a flue gas purification device for desulfurization towers. An appropriate amount of liquid is added to the water tank 21, and desulfurization agent is added to the water tank 21 from the dosing tank 22 through the water adding pipe 23 and mixed evenly.

[0053] Turn on the circulating water pump 24, and draw the mixture containing desulfurization agent from the bottom of the water tank 21 through the water pumping pipe 25. The mixture is then diverted to two spray pipes 27 through the drain pipe 26, and finally sprayed into the tower body 1 in the form of a spray from the nozzle 28.

[0054] Sulfur-containing flue gas enters from the flue gas inlet 2 at the bottom of one side of the tower body 1. During its ascent inside the tower body, it comes into counter-current contact with the droplets sprayed from the nozzle 28. The desulfurization agent in the droplets reacts chemically with pollutants such as sulfur dioxide in the flue gas, thus carrying out preliminary desulfurization and other purification.

[0055] When the gas-liquid mixture flows through the two mesh plates 19 in the middle of the inner side of the tower body 1, the liquid separates from the flue gas under the action of gravity and the interception of the mesh plates. The liquid gathers on the mesh plates and flows down back to the bottom of the tower body, where it can participate in the circulation again.

[0056] The purified flue gas rises to the gas collector 4 on the upper inner side of the tower body 1, near the clean gas outlet 3, and enters the collector through the inlet 7. The intelligent sensor 9 detects the gas composition and state to determine whether it meets the standard. If it does not meet the standard, the circulating fan 18 is started. With the cooperation of the one-way ventilation mechanism, the gas is sent back to the lower part of the tower body 1 for further purification through the exhaust port 10, the gas chamber 11 and the circulation pipe 12. If it meets the standard, the gas is discharged from the outlet 8 at the top of the gas collector 4 and leaves the desulfurization tower through the clean gas outlet 3.

[0057] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A desulfurization tower flue gas purification device, comprising a tower body (1), characterized in that, A flue gas inlet (2) is provided on the lower side of the tower body (1), and a clean gas outlet (3) is provided on the top of the tower body (1). A gas collector (4) is provided on the upper inner side of the tower body (1) and near the clean gas outlet (3). The gas collector (4) is fixedly connected to the inner wall of the tower body (1) by a support rod (20). A sealing umbrella (5) is provided between the lower outer side of the gas collector (4) and the inner wall of the tower body (1). The top of the sealing umbrella (5) has a ring array of multiple equidistant reinforcing ribs (6). The gas collector (4) has an air inlet (7) at its bottom and an air outlet (8) at its top. A smart sensor (9) is fixedly installed on the inner wall of the gas collector (4). Multiple equidistant air extraction ports (10) are arranged in a ring array on the inner wall of the gas collector (4) above the smart sensor (9). A gas chamber (11) communicating with the air extraction ports (10) is opened inside the gas collector (4). A circulation pipe (12) is provided on one side of the tower body (1). One end of the circulation pipe (12) is fixedly connected to the interior of the tower body (1) near the lower position and is located above the flue gas inlet (2). The other end of the circulation pipe (12) extends to the interior of the tower body (1) near the upper position and is connected to the gas chamber (11). A one-way ventilation mechanism is provided inside the circulation pipe (12). A circulation fan (18) is fixedly provided inside the circulation pipe (12) and is located above the one-way ventilation structure.

2. The desulfurization tower flue gas purification device according to claim 1, characterized in that: The one-way ventilation mechanism includes a tension spring bracket (13) fixedly installed on the inner surface of the circulation pipe (12). A one-way blocking ring (14) is fixedly installed on the inner surface of the circulation pipe (12) and below the tension spring bracket (13). A central ring hole (15) is opened at the center of the one-way blocking ring (14). A one-way blocking ball (16) is movably installed below the one-way blocking ring (14). The diameter of the one-way blocking ball (16) is larger than the diameter of the central ring hole (15). A reset holding spring (17) is connected between the bottom end of the tension spring bracket (13) and the top end of the one-way blocking ball (16).

3. The desulfurization tower flue gas purification device according to claim 1, characterized in that: A water tank (21) is provided on the lower part of one side of the tower body (1), and the water tank (21) is connected to the lower part of the tower body (1). A dosing tank (22) is provided on the side of the tower body (1) near the water tank (21). A water supply pipe (23) is connected between the lower part of one side of the dosing tank (22) and the upper part of one side of the water tank (21).

4. The desulfurization tower flue gas purification device according to claim 3, characterized in that: A circulating water pump (24) is fixedly installed on one side of the outer wall of the water tank (21). A water suction pipe (25) is fixedly connected to the suction end of the circulating water pump (24). The end of the water suction pipe (25) away from the circulating water pump (24) is connected to the lower part of one side of the water tank (21).

5. The desulfurization tower flue gas purification device according to claim 4, characterized in that: The discharge end of the circulating water pump (24) is fixedly equipped with a drain pipe (26), and two spray pipes (27) are fixedly installed on one side of the drain pipe (26). The ends of the two spray pipes (27) away from the drain pipe (26) extend into the tower body (1), and multiple nozzles (28) are fixedly installed at their bottom ends.

6. The desulfurization tower flue gas purification device according to claim 1, characterized in that: Two mesh plates (19) are provided in the middle of the inner side of the tower body (1), and the two mesh plates (19) are located below the corresponding water spray pipes (27).

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