Flue gas denitration and desulfurization equipment
By designing filter plates and a sludge pump system inside the desulfurization tower, and combining them with a heat exchange box to recover heat from the flue gas, the problem of pipe blockage caused by the accumulation of solid matter was solved, and the recycling of lime water and ammonia water and the reuse of heat were realized.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-13
- Publication Date
- 2026-03-24
AI Technical Summary
In traditional flue gas desulfurization and denitrification devices, the accumulation of solid sulfide substances can easily lead to pipe blockage or equipment failure, and the heat of the desulfurized flue gas is not effectively utilized.
A filter plate is designed inside the desulfurization tower so that the lime water is higher than the filter plate to form a stratification. A sewage pump is used to extract the solid matter. A demister plate and a diversion plate are installed in the denitrification tower to improve the reaction efficiency. At the same time, a heat exchange box is used to recover the heat of the flue gas.
This avoids pipe blockage caused by the accumulation of solid matter, enables the recycling of lime water and ammonia water, and recovers heat from flue gas through a heat exchange box, reducing thermal energy consumption.
Smart Images
Figure CN224024678U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of flue gas denitrification and desulfurization technology, and in particular to a flue gas denitrification and desulfurization device. Background Technology
[0002] Flue gas desulfurization and denitrification are two common flue gas purification technologies, mainly used to reduce pollutants emitted by industries and power plants. Through flue gas desulfurization and denitrification technologies, air pollution can be effectively controlled, protecting the environment and human health.
[0003] Traditional flue gas desulfurization and denitrification devices typically use lime water to react with sulfides in the flue gas to generate solid sulfides, thus achieving desulfurization. However, the solid sulfides generated will mix with the recycled lime water, and as the solid substances accumulate, they may cause pipe blockage or equipment malfunction.
[0004] Therefore, those skilled in the art have provided a flue gas denitrification and desulfurization device to solve the problems mentioned in the background art. Utility Model Content
[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a flue gas denitrification and desulfurization device. This device features a filter plate designed inside the desulfurization tower, with the lime water level slightly higher than the filter plate. This allows for the filtration of solid matter, creating a stratified mixture with the lime water while maintaining moisture. A suction pump then extracts the solid matter mixed with the lime water above the filter plate through multiple suction branch pipes and the main suction pipe, thus preventing the accumulation of solid matter that could lead to pipe blockage or equipment malfunction.
[0006] To achieve the above objectives, the present invention provides the following technical solution:
[0007] A flue gas denitrification and desulfurization device includes a base plate. A desulfurization tower, a denitrification tower, and a heat exchange box are sequentially installed on the top of the base plate. An air inlet pipe is installed on one side of the desulfurization tower. The desulfurization tower and the denitrification tower are connected by a first connecting pipe. The denitrification tower and the heat exchange box are connected by a second connecting pipe. Inside the desulfurization tower, from top to bottom, a first demister plate, a first water spray frame, a first diverter plate, and a filter plate are sequentially arranged. Multiple first nozzles are installed at the bottom of the first water spray frame. A sludge suction pump is installed at one end of the desulfurization tower. A sludge suction main pipe is installed above the filter plate. Multiple sludge suction branch pipes are integrally arranged on both sides of the sludge suction main pipe. One end of the sludge suction pump is connected to one end of the sludge suction main pipe.
[0008] Through the above technical solution, a filter plate is designed inside the desulfurization tower, and the lime water inside the desulfurization tower is positioned slightly higher than the filter plate. This allows for the filtration of solid matter, forming a stratified mixture with the lime water and maintaining its moisture. Then, through the operation of a suction pump, the solid matter mixed with the lime water above the filter plate is extracted and discharged from the tower through multiple suction branch pipes and the main suction pipe, avoiding the accumulation of solid matter that could lead to pipe blockage or equipment malfunction. The design of the first spray frame and the first nozzle facilitates the spraying of lime water to ensure full contact and reaction with the flue gas. The first demister plate reduces water vapor in the flue gas, and the first diverter plate reduces the flow rate of the flue gas, increasing the contact time between the flue gas and the lime water.
[0009] Furthermore, the interior of the denitrification tower is provided with a set of second demister plates, a second water spray frame and a second diversion plate from top to bottom, and multiple second nozzles are installed at the bottom of the second water spray frame;
[0010] Through the above technical solution, a set of second demister plates, second water spray racks and second diversion plates are arranged sequentially from top to bottom inside the denitrification tower. Multiple second nozzles are installed at the bottom of the second water spray rack to facilitate the spraying of ammonia water to fully contact and react with the flue gas. The second demister plates can reduce water vapor in the flue gas, and the second diversion plates can reduce the flow rate of the flue gas and increase the contact time between the flue gas and ammonia water.
[0011] Furthermore, a heat exchange tube is fixedly installed inside the heat exchange box, one end of the heat exchange tube is connected to one end of the second connecting pipe, and an exhaust pipe is integrally installed at the top of the heat exchange box, with the bottom end of the exhaust pipe connected to one end of the heat exchange tube.
[0012] Through the above technical solution, since the flue gas after desulfurization and denitrification still contains a lot of heat, before it is discharged, the flue gas with heat is exchanged through a heat exchange box. The flue gas transfers the heat in the flue gas to the low temperature water inside the heat exchange box through the heat exchange tube, so that the heat energy can be reused and the consumption of heat energy can be reduced.
[0013] Furthermore, a first pressure pump is installed at one bottom side of the desulfurization tower, a first water supply pipe is installed at one end of the first pressure pump, one end of the first water supply pipe is connected to the first water spray frame, and the other end of the first pressure pump extends to the inner bottom of the desulfurization tower.
[0014] Through the above technical solution, the two ends of the first pressure pump are connected to the lime water stored at the bottom of the desulfurization tower and the first water spray frame, respectively, so that the lime water can be recycled.
[0015] Furthermore, a second pressure pump is installed at one bottom side of the denitrification tower, a second water supply pipe is installed at one end of the second pressure pump, one end of the second water supply pipe is connected to the second water spray frame, and the other end of the second pressure pump extends to the inner bottom of the denitrification tower.
[0016] Through the above technical solution, the two ends of the second pressure pump are connected to the ammonia water stored at the bottom of the denitrification tower and the second water spray frame, respectively, so that the ammonia water can be recycled.
[0017] Furthermore, a water inlet pipe is installed on the upper side of one side of the heat exchange box, and a drain pipe is installed on the lower side of one side of the heat exchange box.
[0018] The above technical solution allows for the convenient replacement of the water inside the heat exchanger by installing an inlet pipe on the upper side of one side and a drain pipe on the lower side of one side.
[0019] Furthermore, the lime water inside the desulfurization tower is positioned higher than the filter plate;
[0020] With the above technical solution, the lime water inside the desulfurization tower is positioned higher than the filter plate, which makes it easier to keep solid impurities moist and facilitates the extraction by the sewage pump.
[0021] Furthermore, a filter screen is installed at the top of the exhaust pipe;
[0022] The above technical solution involves installing a filter screen at the top of the exhaust pipe to prevent external substances from entering the exhaust pipe.
[0023] This utility model has the following beneficial effects:
[0024] 1. The flue gas denitrification and desulfurization equipment proposed in this utility model has a filter plate designed inside the desulfurization tower, and the lime water inside the desulfurization tower is slightly higher than the filter plate. This allows the solid matter to be filtered and separated into layers with the lime water, while maintaining moisture. Then, by operating a sludge pump, the solid matter mixed with lime water above the filter plate is extracted and discharged from the tower through multiple sludge suction branch pipes and the main sludge suction pipe, avoiding the accumulation of solid matter that may lead to pipe blockage or equipment failure.
[0025] 2. The flue gas denitrification and desulfurization equipment proposed in this utility model, since the flue gas after desulfurization and denitrification still contains a large amount of heat, heat exchange is performed on the flue gas with heat through a heat exchange box before it is discharged. The flue gas transfers the heat in the flue gas to the low temperature water inside the heat exchange box through the heat exchange tube, so that the heat energy can be reused and the heat energy consumption is reduced. Attached Figure Description
[0026] Figure 1This is a front axle view of a flue gas denitrification and desulfurization equipment proposed in this utility model;
[0027] Figure 2 This is a cross-sectional view of a flue gas denitrification and desulfurization device proposed in this utility model;
[0028] Figure 3 This is a rear axonometric drawing of a flue gas denitrification and desulfurization device proposed in this utility model;
[0029] Figure 4 This is a cross-sectional view of the desulfurization tower of a flue gas denitrification and desulfurization equipment proposed in this utility model;
[0030] Figure 5 This is a front view of a flue gas denitrification and desulfurization device proposed in this utility model.
[0031] Legend:
[0032] 1. Base plate; 2. Desulfurization tower; 3. First connecting pipe; 4. Denitrification tower; 5. Second connecting pipe; 6. Heat exchange box; 7. Air inlet pipe; 8. First demister plate; 9. First water spray frame; 10. First diversion plate; 11. Filter plate; 12. First nozzle; 13. First pressure pump; 14. First water supply pipe; 15. Second demister plate; 16. Second water spray frame; 17. Second diversion plate; 18. Heat exchange tube; 19. Exhaust stack; 20. Filter screen; 21. Water inlet pipe; 22. Drain pipe; 23. Sewage pump; 24. Main sewage suction pipe; 25. Sewage suction branch pipe; 26. Second pressure pump; 27. Second water supply pipe; 28. Second nozzle. Detailed Implementation
[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0034] Reference Figure 1-5This utility model provides an embodiment of a flue gas denitrification and desulfurization device, comprising a base plate 1. A desulfurization tower 2, a denitrification tower 4, and a heat exchange box 6 are sequentially installed on the top of the base plate 1. An air inlet pipe 7 is installed on one side of the desulfurization tower 2. The desulfurization tower 2 and the denitrification tower 4 are connected by a first connecting pipe 3, and the denitrification tower 4 and the heat exchange box 6 are connected by a second connecting pipe 5. Inside the desulfurization tower 2, from top to bottom, a first demister plate 8, a first spray frame 9, a first diverter plate 10, and a filter plate 11 are sequentially arranged. Multiple first nozzles 12 are installed at the bottom of the first spray frame 9. A sludge suction pump 23 is installed at one end of the desulfurization tower 2. A sludge suction main pipe 24 is installed above the filter plate 11. Multiple sludge suction branch pipes 25 are integrally arranged on both sides of the sludge suction main pipe 24. One end of the sludge suction pump 23 is connected to the sludge suction main pipe 24. One end of 4 is connected. A filter plate 11 is designed inside the desulfurization tower 2, and the lime water inside the desulfurization tower 2 is slightly higher than the filter plate 11. This allows the solid matter to be filtered and separated into layers with the lime water, while keeping it moist. Then, the solid matter mixed with the lime water above the filter plate 11 is extracted and discharged from the tower through multiple suction branch pipes 25 and suction main pipe 24 by the suction pump 23. This avoids the accumulation of solid matter, which may cause pipe blockage or equipment failure. The design of the first spray frame 9 and the first nozzle 12 facilitates the spraying of lime water to ensure full contact and reaction with the flue gas. The first demister plate 8 can reduce water vapor in the flue gas, and the first diverter plate 10 can reduce the flow rate of the flue gas and increase the contact time between the flue gas and the lime water.
[0035] Inside the denitrification tower 4, from top to bottom, are arranged a second demister plate 15, a second water spray frame 16, and a second diversion plate 17. Multiple second nozzles 28 are installed at the bottom of the second water spray frame 16 to facilitate the spraying of ammonia water to ensure sufficient contact and reaction with the flue gas. The second demister plate 15 reduces water vapor in the flue gas, and the second diversion plate 17 reduces the flue gas velocity, increasing the contact time between the flue gas and the ammonia water. The heat exchange box 6 is fixedly equipped with... There is a heat exchange tube 18, one end of which is connected to one end of the second connecting pipe 5. An exhaust pipe 19 is integrally installed at the top of the heat exchange box 6, and the bottom end of the exhaust pipe 19 is connected to one end of the heat exchange tube 18. Since the flue gas after desulfurization and denitrification still contains a large amount of heat, it is heat-exchanged through the heat exchange box 6 before being discharged. The flue gas transfers its heat to the low-temperature water inside the heat exchange box 6 through the heat exchange tube 18, thus allowing for the reuse of thermal energy and reducing thermal energy consumption. A first pressure pump 13 is installed at the bottom of one side of the desulfurization tower 2, and a first water supply pipe 14 is installed at one end of the first pressure pump 13. The first water supply pipe 14... One end of the first pressure pump 13 is connected to the first spray frame 9, and the other end extends to the inner bottom of the desulfurization tower 2. Both ends of the first pressure pump 13 are connected to the lime water stored at the inner bottom of the desulfurization tower 2 and the first spray frame 9, respectively, thus enabling the recycling of lime water. A second pressure pump 26 is installed at the bottom of one side of the denitrification tower 4. A second water supply pipe 27 is installed at one end of the second pressure pump 26, and one end of the second water supply pipe 27 is connected to the second spray frame 16. The other end of the second pressure pump 26 extends to the inner bottom of the denitrification tower 4. Both ends of the second pressure pump 26 are connected to the ammonia water stored at the inner bottom of the denitrification tower 4 and the second spray frame 16, respectively, thus enabling the recycling of lime water. To achieve the recycling of ammonia water, an inlet pipe 21 is installed on the upper side of one side of the heat exchange box 6, and a drain pipe 22 is installed on the lower side of one side of the heat exchange box 6. The water inlet pipe 21 is installed on the upper side of one side of the heat exchange box 6, and the drain pipe 22 is installed on the lower side of one side of the heat exchange box 6, so as to facilitate the replacement of the water inside the heat exchange box 6. The lime water inside the desulfurization tower 2 is higher than the filter plate 11, so as to keep solid impurities moist and facilitate the extraction by the sewage pump 23. A filter screen 20 is installed at the top of the flue duct 19, so as to prevent external substances from entering the flue duct 19.
[0036] Working principle: A filter plate 11 is designed inside the desulfurization tower 2, and the lime water inside the tower 2 is slightly higher than the filter plate 11. This allows for the filtration of solid matter, forming a stratified mixture with the lime water and maintaining its moisture. Then, the suction pump 23 operates, drawing the solid matter mixed with the lime water above the filter plate 11 out of the tower through multiple suction branch pipes 25 and the main suction pipe 24. This prevents the accumulation of solid matter, which could lead to pipe blockage or equipment malfunction. Since the flue gas after desulfurization and denitrification still contains a large amount of heat, it is heat-exchanged in a heat exchange box 6 before being discharged. The flue gas transfers its heat to the low-temperature water inside the heat exchange box 6 through heat exchange pipes 18, thus allowing the thermal energy to be released. The design of the first spray frame 9 and the first nozzle 12 facilitates the spraying of lime water to ensure full contact and reaction with the flue gas. The first demister plate 8 reduces water vapor in the flue gas, and the first diverter plate 10 reduces the flow rate of the flue gas and increases the contact time between the flue gas and the lime water. Inside the denitrification tower 4, a set of second demister plates 15, second spray frames 16, and second diverter plates 17 are arranged sequentially from top to bottom. Multiple second nozzles 28 are installed at the bottom of the second spray frame 16 to facilitate the spraying of ammonia water to ensure full contact and reaction with the flue gas. The second demister plate 15 reduces water vapor in the flue gas, and the second diverter plate 17 reduces the flow rate of the flue gas and increases the contact time between the flue gas and the ammonia water.
[0037] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A flue gas denitrification and desulfurization device, comprising a base plate (1), characterized in that: The top of the base plate (1) is sequentially equipped with a desulfurization tower (2), a denitrification tower (4), and a heat exchange box (6). An air inlet pipe (7) is installed on one side of the desulfurization tower (2). The desulfurization tower (2) and the denitrification tower (4) are connected by a first connecting pipe (3). The denitrification tower (4) and the heat exchange box (6) are connected by a second connecting pipe (5). Inside the desulfurization tower (2), from top to bottom, a set of first demister plates (8), a first... The system includes a spray frame (9), a first diversion plate (10), and a filter plate (11). The bottom of the first spray frame (9) is equipped with multiple first nozzles (12). One end of the desulfurization tower (2) is equipped with a sludge pump (23). A sludge suction main pipe (24) is installed above the filter plate (11). Multiple sludge suction branch pipes (25) are integrally provided on both sides of the sludge suction main pipe (24). One end of the sludge pump (23) is connected to one end of the sludge suction main pipe (24).
2. The flue gas denitrification and desulfurization equipment according to claim 1, characterized in that: The denitrification tower (4) is provided with a set of second demister plate (15), second water spray frame (16) and second diversion plate (17) arranged from top to bottom. Multiple second nozzles (28) are installed at the bottom of the second water spray frame (16).
3. The flue gas denitrification and desulfurization equipment according to claim 1, characterized in that: The heat exchange box (6) is fixedly provided with a heat exchange tube (18). One end of the heat exchange tube (18) is connected to one end of the second connecting pipe (5). The top of the heat exchange box (6) is integrally provided with a flue (19). The bottom end of the flue (19) is connected to one end of the heat exchange tube (18).
4. The flue gas denitrification and desulfurization equipment according to claim 1, characterized in that: A first pressure pump (13) is installed at one bottom side of the desulfurization tower (2). A first water supply pipe (14) is installed at one end of the first pressure pump (13). One end of the first water supply pipe (14) is connected to the first water spray frame (9). The other end of the first pressure pump (13) extends to the inner bottom of the desulfurization tower (2).
5. The flue gas denitrification and desulfurization equipment according to claim 1, characterized in that: A second pressure pump (26) is installed at one bottom side of the denitrification tower (4). A second water supply pipe (27) is installed at one end of the second pressure pump (26). One end of the second water supply pipe (27) is connected to the second water spray frame (16). The other end of the second pressure pump (26) extends to the inner bottom of the denitrification tower (4).
6. The flue gas denitrification and desulfurization equipment according to claim 1, characterized in that: A water inlet pipe (21) is installed on the upper side of one side of the heat exchange box (6), and a drain pipe (22) is installed on the lower side of one side of the heat exchange box (6).
7. The flue gas denitrification and desulfurization equipment according to claim 1, characterized in that: The lime water inside the desulfurization tower (2) is positioned higher than the filter plate (11).
8. The flue gas denitrification and desulfurization equipment according to claim 3, characterized in that: A filter screen (20) is installed at the top of the exhaust pipe (19).