A desulfurization and denitration integrated tower purification device

Abstract

The application discloses a desulfurization and denitration integrated tower purification device, which comprises a desulfurization and denitration integrated tower, a smoke inlet is arranged at the bottom side of the desulfurization and denitration integrated tower, a smoke outlet is arranged at the top of the desulfurization and denitration integrated tower, a flue gas distribution plate, a sulfur dioxide removal zone, a nitrogen oxide oxidation zone, a nitrogen dioxide removal zone and a demisting zone are sequentially arranged in the desulfurization and denitration integrated tower from bottom to top along the flue, the sulfur dioxide removal zone, the nitrogen oxide oxidation zone and the nitrogen dioxide removal zone are the same in structure and are interconnected, and a circulating pump liquid assembly is externally connected to the desulfurization and denitration integrated tower. The desulfurization and denitration integrated tower is divided into functionally independent and identically structured treatment zones, the flue gas is gradually purified, the residence time and airflow path of the flue gas are controlled in each region, the contact efficiency of harmful substances and reagents is remarkably improved, and the incomplete purification problem caused by the excessively high flue gas flow rate in the traditional process is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flue gas treatment, in particular to a desulfurization and denitrification integrated tower purification device. BACKGROUND

[0002] In the field of large-scale industries such as brick kiln, cement kiln, glass kiln, steel industry, the treatment of flue gas containing sulfur dioxide and nitrogen oxides has always been a difficult problem. In the prior art, two types of flue gas treatment devices are generally used as the main body of flue gas treatment. One is the traditional flue gas treatment process route integrated with multiple devices, but the multiple devices have large occupied area and high investment cost, and require high skills of the operators. The other is a desulfurization and denitrification integrated tower purification device, which is more commonly selected in the market and can meet the flue gas treatment of sulfur dioxide and nitrogen oxides in most industrial fields.

[0003] In the prior art, when using the wet method for desulfurization and denitrification in the desulfurization and denitrification integrated tower, the flue gas flow is too fast or the contact time between the sprayed liquid and the flue gas is too short, which easily causes incomplete desulfurization and denitrification of the flue gas. Moreover, the denitrification agent and the desulfurization agent used in the desulfurization and denitrification are not conducive to recycling and reuse when mixed, which causes a large amount of resource waste. Therefore, the prior art urgently needs a technical solution to solve the above problems. SUMMARY

[0004] The purpose of the present application is to provide a desulfurization and denitrification integrated tower purification device to solve the problems in the background art.

[0005] To solve the above technical problems, the technical solution adopted by the present application is as follows:

[0006] A desulfurization and denitrification integrated tower purification device, comprising a desulfurization and denitrification integrated tower, wherein a smoke inlet is formed at the bottom side of the desulfurization and denitrification integrated tower, and a smoke outlet is formed at the top of the desulfurization and denitrification integrated tower. A flue gas uniform distribution plate, a sulfur dioxide removal zone, a nitrogen oxide oxidation zone, a nitrogen dioxide removal zone and a demisting zone are sequentially arranged in the desulfurization and denitrification integrated tower from bottom to top along the flue. The sulfur dioxide removal zone, the nitrogen oxide oxidation zone and the nitrogen dioxide removal zone have the same structure and are interconnected. A circulating pump liquid assembly is externally connected to the desulfurization and denitrification integrated tower.

[0007] Furthermore, the sulfur dioxide removal zone includes an inclined plate fixedly installed inside the integrated desulfurization and denitrification tower. A receiving pipe is fixedly installed inside the inclined plate. The pipe wall of the receiving pipe has an annular groove. An annular baffle is fixedly installed inside the receiving pipe. An air inlet pipe is fixedly installed inside the annular baffle. Multiple air outlets are opened at the top of the air inlet pipe. An air outlet pipe is fixedly installed inside each air outlet. The end of the air outlet pipe penetrates the side wall of the receiving pipe and extends into the integrated desulfurization and denitrification tower. An annular chamber is fixedly connected to the top outer side of the receiving pipe. The outer side wall of the annular chamber is attached to the inner wall of the integrated desulfurization and denitrification tower. Multiple nozzles are fixedly connected to the bottom of the annular chamber.

[0008] Furthermore, a rain cap is fixedly installed on the outer wall of the receiving pipe, and the bottom of the rain cap is attached to the top of the multiple air outlet pipes, with the bottom radius of the rain cap being greater than the length of the air outlet pipe.

[0009] Furthermore, an annular top support device is fixedly connected to the top of the annular partition, and an avoidance groove is provided on the inner wall of the bearing pipe at the annular slot for the annular top support device to slide. When the output end of the annular top support device slides upward along the avoidance groove to the end of its travel, the output end of the annular top support device blocks the annular slot.

[0010] Furthermore, an annular water baffle is fixedly installed on the top of the annular top support device, and the annular water baffle is provided with multiple mounting slots for avoiding the air outlet pipe.

[0011] Furthermore, an exhaust fan is fixedly installed inside the receiving pipe, and an annular baffle for restricting the flow direction of the flue is fixedly installed on the top inner side of the receiving pipe.

[0012] Furthermore, the circulating pump assembly includes multiple pipes fixedly installed outside the desulfurization and denitrification integrated tower. These pipes are respectively connected to the interior of the sulfur dioxide removal zone, the nitrogen oxide oxidation zone, the nitrogen dioxide removal zone, and the demisting zone. The sulfur dioxide removal zone is connected to an alkaline solution circulating pump via a pipe. The end of the alkaline solution circulating pump away from the pipe is connected to an alkaline solution circulating pool. An alkaline solution tank is located on one side of the alkaline solution circulating pool. The nitrogen oxide oxidation zone is connected to an oxidant circulating pump via a pipe. The end of the oxidant circulating pump away from the pipe is connected to an oxidant circulating pool. An oxidant tank is located on one side of the oxidant circulating pool. Wastewater discharge pumps are installed in both the alkaline solution circulating pool and the oxidant circulating pool.

[0013] Furthermore, the demisting zone includes two demisters fixedly installed inside the desulfurization and denitrification integrated tower. Three annular flushing pipes are provided between the two demisters. The three annular flushing pipes are connected to a flushing water pump through a pipeline. A clear water tank is connected to the side of the flushing water pump away from the pipeline.

[0014] Due to the adoption of the above technical solution, the technical progress achieved by this invention compared to the prior art is as follows:

[0015] This invention achieves step-by-step purification of flue gas by dividing the integrated desulfurization and denitrification tower into functionally independent but structurally identical treatment zones: a sulfur dioxide removal zone, a nitrogen oxide oxidation zone, and a nitrogen dioxide removal zone. By controlling the flue gas residence time and airflow path in each zone, the contact efficiency between harmful substances and reagents can be significantly improved, solving the problem of incomplete purification caused by excessively high flue gas velocity in traditional processes.

[0016] This invention addresses the drawback of existing technologies where mixed reagents are difficult to recycle by employing separate alkali circulation systems and oxidant circulation systems. Each processing area is equipped with dedicated reagent recovery tanks—an alkali circulation tank and an oxidant circulation tank—enabling independent recycling of reagents and significantly reducing resource waste and operating costs.

[0017] This invention introduces an intelligent control mechanism combining a ring-shaped top support device with an exhaust fan. By blocking or opening the flue gas channel, it actively extends the reaction time and accelerates airflow after purification meets the standards. At the same time, the rain cap guide structure and the ring-shaped water baffle design work together to optimize the gas-liquid mixing path, which not only avoids short-circuiting of spray droplets but also prevents water accumulation in the pipes, further improving purification efficiency and stability. Attached Figure Description

[0018] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a front sectional view of the present invention;

[0021] Figure 3 for Figure 2 Enlarged diagram of A in the middle;

[0022] Figure 4 This is a partial structural diagram of the annular compartment in this invention;

[0023] Figure 5 for Figure 4 Another perspective view of the inclined plate;

[0024] Figure 6 This is a schematic diagram of the external structure of the integrated desulfurization and denitrification tower in this invention.

[0025] In the diagram: 1. Alkali circulation pump; 2. Alkali circulation tank; 3. Oxidant circulation tank; 4. Oxidant circulation pump; 5. Desulfurization and denitrification integrated tower; 6. Clear water tank; 7. Flue water pump; 8. Alkali tank; 9. Wastewater discharge pump; 10. Oxidant tank; 12. Flue gas inlet; 13. Flue gas outlet; 14. Flue gas distribution plate; 15. Sulfur dioxide removal zone; 16. Nitrogen oxide oxidation zone; 17. Nitrogen dioxide removal zone; 18. Demisting zone; 19. Inclined plate; 20. Connecting pipe; 21. Annular slot; 22. Annular baffle; 23. Air inlet pipe; 24. Air outlet pipe; 25. Annular chamber; 26. Nozzle; 27. Rain cap; 28. Annular top support device; 29. ​​Annular water baffle; 30. Installation slot; 31. Exhaust fan; 32. Annular enclosure; 33. Demister. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] The concepts involved in this application will first be described with reference to the accompanying drawings. It should be noted that the following descriptions of various concepts are only for the purpose of making the content of this application easier to understand and do not constitute a limitation on the scope of protection of this application; furthermore, the embodiments and features in the embodiments of this application can be combined with each other unless otherwise specified. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] Example

[0029] like Figures 1 to 6 As shown, the present invention provides a desulfurization and denitrification integrated tower purification device, including a desulfurization and denitrification integrated tower 5. The bottom side of the desulfurization and denitrification integrated tower 5 is provided with a flue gas inlet 12, and the top of the desulfurization and denitrification integrated tower 5 is provided with a flue gas distribution plate 14, a sulfur dioxide removal zone 15, a nitrogen oxide oxidation zone 16, a nitrogen dioxide removal zone 17, and a demisting zone 18 are arranged sequentially from bottom to top along the flue inside the desulfurization and denitrification integrated tower 5. The sulfur dioxide removal zone 15, the nitrogen oxide oxidation zone 16, and the nitrogen dioxide removal zone 17 have the same structure and are interconnected. A circulating pump liquid assembly is externally connected to the desulfurization and denitrification integrated tower 5.

[0030] As a further explanation of this embodiment, in this embodiment, by dividing the flue gas into zones in the integrated desulfurization and denitrification tower 5, the flue gas flows through the flue gas distribution plate 14, the sulfur dioxide removal zone 15, the nitrogen oxide oxidation zone 16, the nitrogen dioxide removal zone 17, and the demisting zone 18 in sequence, removing harmful substances from the flue gas and purifying it, thereby achieving the effect of flue gas treatment. In this process, since the sulfur dioxide removal zone 15, the nitrogen oxide oxidation zone 16, and the nitrogen dioxide removal zone 17 have the same structure, and the residence time of the flue gas in the three independent zones can be controlled, the flue gas can enter the next stage of treatment only after it has fully contacted the sprayed solution, making the flue gas treatment more thorough. In addition, the sulfur dioxide removal zone 15, the nitrogen oxide oxidation zone 16, and the nitrogen dioxide removal zone 17 are evenly distributed with separate recovery devices, so that the sprayed solution can be recovered and recycled in a timely manner, reducing the cost of flue gas treatment.

[0031] As a preferred solution provided by the integrated desulfurization and denitrification tower purification device, the sulfur dioxide removal zone 15 includes an inclined plate 19 fixedly installed inside the integrated desulfurization and denitrification tower 5. A receiving pipe 20 is fixedly installed inside the inclined plate 19. The pipe wall of the receiving pipe 20 has an annular groove 21. An annular baffle 22 is fixedly installed inside the receiving pipe 20. An air inlet pipe 23 is fixedly installed inside the annular baffle 22. Multiple air outlets are opened at the top of the air inlet pipe 23. An air outlet pipe 24 is fixedly installed inside the air outlet. The end of the air outlet pipe 24 penetrates the side wall of the receiving pipe 20 and extends into the integrated desulfurization and denitrification tower 5. An annular chamber 25 is fixedly connected to the top outer side of the receiving pipe 20. The outer ring side wall of the annular chamber 25 is attached to the inner wall of the integrated desulfurization and denitrification tower 5. Multiple nozzles 26 are fixedly connected to the bottom of the annular chamber 25.

[0032] As a further explanation of this embodiment, in this embodiment, flue gas enters from the bottom of the inlet pipe 23 and enters the desulfurization and denitrification integrated tower 5 along the outlet pipe 24 at the top of the inlet pipe 23. At this time, the desulfurization and denitrification integrated tower 5 is separated by the inclined plate 19 and the annular chamber 25, forming an independent space, so that the flow rate of flue gas entering this space is relatively slow. When the flue gas flows in, the solution is sprayed into the independent space through the nozzle 26 at the bottom of the annular chamber 25, so that the solution and flue gas can fully contact and mix, removing harmful substances in the flue gas. When too much flue gas enters the independent space, After the flue gas is flushed by the solution, some of the flue gas will enter the receiving pipe 20 along the annular groove 21 and continue to flow upward. Since the structures in the sulfur dioxide removal zone 15, nitrogen oxide oxidation zone 16, and nitrogen dioxide removal zone 17 in this embodiment are exactly the same, the outlet at the top of the receiving pipe 20 is connected to the bottom of the inlet pipe 23 in the next stage, thus forming a complete flue gas flow channel. The solution drips down onto the inclined plate 19 and then gathers at the bottom of the inclined plate 19 to facilitate subsequent solution collection and recycling.

[0033] As a preferred solution provided by the desulfurization and denitrification integrated tower purification device, a rain cap 27 is fixedly installed on the outer wall of the receiving pipe 20, and the bottom of the rain cap 27 is attached to the top of multiple air outlet pipes 24, and the bottom radius of the rain cap 27 is greater than the length of the air outlet pipes 24.

[0034] As a further explanation of this embodiment, in this embodiment, the rain cap 27 is used to block the solution sprayed by the nozzle 26 to prevent the solution from falling too fast and failing to fully contact the flue gas. The bottom of the rain cap 27 covers the exhaust range of the exhaust pipe 24, so that when the flue gas flows out from the exhaust pipe 24, it can flow along the bottom of the rain cap 27 to the edge of the rain cap 27, while the solution blocked by the rain cap 27 slides down the slope of the rain cap 27 to the edge of the rain cap 27. Finally, the solution and the flue gas fully contact and mix at the edge of the rain cap 27, thereby achieving the effect of prolonging the reaction time of the flue gas solution.

[0035] As a preferred solution provided by the desulfurization and denitrification integrated tower purification device, the top of the annular baffle 22 is fixedly connected to an annular top support device 28, and the inner wall of the receiving pipe 20 is provided with a clearance annular groove at the annular slot 21 for the annular top support device 28 to slide. When the output end of the annular top support device 28 slides upward along the clearance annular groove to the end of the stroke, the output end of the annular top support device 28 blocks the annular slot 21.

[0036] As a further explanation of this embodiment, in order to further increase the mixing time of flue gas and solution, the output end of the annular top support device 28 (the annular top support device 28 is a special form of telescopic rod in the prior art, used to drive the output end to move up and down and extend and retract) is blocked to prevent flue gas from flowing into the receiving pipe 20 from the annular top support device 21, thereby forcibly restricting the upward channel of flue gas, thereby increasing the mixing time of flue gas and solution, until the part that needs to be stripped from the flue gas is completely removed, and then the blockage of the annular top support device 28 is opened to allow the flue gas to flow upward again.

[0037] As a preferred solution provided by the desulfurization and denitrification integrated tower purification device, the top of the annular top support device 28 is fixedly installed with an annular water baffle 29, and the annular water baffle 29 is provided with multiple installation slots 30 for avoiding the gas outlet pipe 24.

[0038] As a further explanation of this embodiment, in this embodiment, during wet denitrification and desulfurization, the flue gas contains a large amount of moisture. In order to prevent the moisture in the flue gas from accumulating in the pipe 20 and obstructing the flow of flue gas in the pipe, an annular water baffle 29 is set on the top of the annular top support device 28 to guide the water in the pipe 20 to flow out from the annular slot 21 along the bottom of the annular water baffle 29 and flow onto the inclined plate 19.

[0039] As a preferred solution provided by the integrated desulfurization and denitrification tower purification device, an exhaust fan 31 is fixedly installed inside the receiving pipe 20, and an annular enclosure 32 for restricting the flow direction of the flue is fixedly installed on the top inner side of the receiving pipe 20.

[0040] As a further explanation of this embodiment, in this embodiment, when the flue gas flows into the receiving pipe 20 from the annular slot 21, the natural flow rate of the flue gas is too slow. Although it can effectively improve the mixing degree of flue gas and solution, it also reduces the overall efficiency of the device in treating flue gas. Therefore, the negative pressure suction generated by the rotation of the exhaust fan 31 accelerates the rate at which the flue gas enters the receiving pipe 20, allowing the flue gas to flow faster in the receiving pipe 20 and quickly enter the next stage flue gas treatment zone. In conjunction with the annular top support device 28, after the flue gas and solution are fully mixed, when the blockage of the annular top support device 28 is opened, the exhaust fan 31 is activated to accelerate the flow rate of the flue gas, thereby improving the overall flue gas treatment efficiency of the device.

[0041] As a further explanation of this embodiment, in this embodiment, a flue gas composition testing device is added near the exhaust fan 31 to test whether the toxic and harmful substances in the flue gas meet the standards. If they do, the flue gas flow is accelerated. If they do not meet the standards, the exhaust fan 31 is driven to rotate in the opposite direction to discharge the flue gas back into the receiving pipe 20, thereby further improving the cleanliness of the flue gas treatment of this device.

[0042] As a preferred solution provided by the integrated desulfurization and denitrification tower purification device, the circulating pump liquid assembly includes multiple pipes fixedly installed outside the integrated desulfurization and denitrification tower 5. The multiple pipes are respectively connected to the interior of the sulfur dioxide removal zone 15, the nitrogen oxide oxidation zone 16, the nitrogen dioxide removal zone 17, and the demisting zone 18. The sulfur dioxide removal zone 15 is connected to an alkaline solution circulating pump 1 through the pipe. The end of the alkaline solution circulating pump 1 away from the pipe is connected to an alkaline solution circulating pool 2. An alkaline solution tank 8 is provided on one side of the alkaline solution circulating pool 2. The nitrogen oxide oxidation zone 16 is connected to an oxidant circulating pump 4 through the pipe. The end of the oxidant circulating pump 4 away from the pipe is connected to an oxidant circulating pool 3. An oxidant tank 10 is provided on one side of the oxidant circulating pool 3. Wastewater discharge pumps 9 are provided in both the alkaline solution circulating pool 2 and the oxidant circulating pool 3.

[0043] As a preferred solution provided by the desulfurization and denitrification integrated tower purification device, the demisting zone 18 includes two demisters 33 fixedly installed in the desulfurization and denitrification integrated tower 5. Three annular flushing pipes are provided between the two demisters 33. The three annular flushing pipes are connected to a flushing water pump 7 through the pipes. A clear water tank 6 is connected to the side of the flushing water pump 7 away from the pipes.

[0044] The overall working process of this device is as follows: flue gas enters the desulfurization and denitrification integrated tower 5 from the flue gas inlet 12. After the flue gas is evenly distributed by the flue gas distribution plate 14, it enters the sulfur dioxide removal zone 15. The alkali solution in the alkali solution tank 8 is put into the alkali solution circulation pool 2. The alkali solution is transported to the annular chamber 25 in the sulfur dioxide removal zone 15 by the alkali solution circulation pump 1. It is sprayed into the desulfurization and denitrification integrated tower 5 through the nozzle 26, so that the alkali solution reacts with the sulfur dioxide in the flue gas to achieve the purpose of removing sulfur dioxide. Under the action of the rain cap 27 and the inclined plate 19 (the bottom end of the inclined plate 19 is connected to the alkali solution circulation pump 1 through the pipe), the alkali solution flows back into the alkali solution circulation pool 2. The flue gas, after sulfur dioxide removal, enters the nitrogen oxide oxidation zone 16 through the receiving pipe 20. The oxidant in the oxidant tank 10 is placed in the oxidant circulation tank 3. The oxidant slurry is then pumped to the integrated desulfurization and denitrification tower 5 via the oxidant circulation pump 4. After undergoing the same process as above, nitric oxide is converted to nitrogen dioxide in the nitrogen oxide oxidation zone 16, achieving the oxidation purpose. Under the action of the rain cap 27 and the inclined plate 19, the oxidant flows back to the oxidant circulation tank 3. After oxidation, the nitrogen dioxide-containing flue gas enters the nitrogen dioxide removal zone 17. The alkali solution in the alkali circulation tank 2 is pumped into the nitrogen dioxide removal zone 17 via the alkali solution circulation pump 1. The alkali solution reacts with the nitrogen dioxide in the flue gas, achieving the removal of nitrogen dioxide. The purified flue gas is then flushed by the demister 33 and the annular flushing pipe to remove water mist before being discharged into the atmosphere through the flue gas outlet 13.

[0045] The wastewater discharge pump 9 of this device is connected to a zero-discharge wastewater system. The slurry that circulates for a long time during the flue gas treatment process is transported to the zero-discharge wastewater system by the wastewater discharge pump 9, and zero pollution discharge is achieved through wastewater treatment technology.

[0046] This device can achieve desulfurization and denitrification under harsh conditions such as low temperature, high dust, and high alkalinity. Furthermore, the liquid-gas ratio in alkaline desulfurization is less than that in limestone and gypsum methods, thus requiring a much smaller circulating water pump. To address the issue of pipe blockage caused by high pH, ​​alkaline desulfurization can increase the liquid-gas ratio and lower the reaction pH, controlling the pH of the circulating tank between 5 and 6, thereby preventing pipe blockage. Simultaneously, this system only requires one integrated desulfurization and denitrification tower, resulting in low investment costs and minimal space requirements. Combined with a zero-discharge wastewater system, zero wastewater discharge is achieved. This invention will not elaborate on the zero-discharge wastewater system. The above-described embodiments and / or implementation methods are merely preferred embodiments and / or implementation methods for illustrating the technology of this invention and are not intended to limit the implementation of this invention in any way. Any person skilled in the art can make some modifications or alterations to other equivalent embodiments without departing from the scope of the technical means disclosed in this invention, but these should still be considered as technologies or embodiments substantially the same as this invention.

[0047] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. The above descriptions are only preferred embodiments of this application. It should be noted that due to the limitations of written expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of this application, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of this application.

Claims

1. A desulfurization and denitrification integrated tower purification device, comprising a desulfurization and denitrification integrated tower (5), characterized in that: The desulfurization and denitrification integrated tower (5) has a flue gas inlet (12) on its bottom side and a flue gas outlet (13) on its top. The desulfurization and denitrification integrated tower (5) is arranged in the flue gas distribution plate (14), sulfur dioxide removal zone (15), nitrogen oxide oxidation zone (16), nitrogen dioxide removal zone (17) and demisting zone (18) in sequence from bottom to top. The sulfur dioxide removal zone (15), nitrogen oxide oxidation zone (16) and nitrogen dioxide removal zone (17) have the same structure and are interconnected. The desulfurization and denitrification integrated tower (5) is externally connected to a circulating pump liquid assembly. The sulfur dioxide removal zone (15) includes an inclined plate (19) fixedly installed inside the desulfurization and denitrification integrated tower (5). A receiving pipe (20) is fixedly installed inside the inclined plate (19). The pipe wall of the receiving pipe (20) is provided with an annular groove (21). An annular partition (22) is fixedly installed inside the receiving pipe (20). An air inlet pipe (23) is fixedly installed inside the annular partition (22). Multiple air outlets are provided at the top of the air inlet pipe (23). An air outlet pipe (24) is fixedly installed inside the air outlet. The end of the air outlet pipe (24) penetrates the side wall of the receiving pipe (20) and extends into the desulfurization and denitrification integrated tower (5). An annular chamber (25) is fixedly connected to the top outer side of the receiving pipe (20). The outer ring side wall of the annular chamber (25) is attached to the inner wall of the desulfurization and denitrification integrated tower (5). Multiple nozzles (26) are fixedly connected to the bottom of the annular chamber (25).

2. The desulfurization and denitrification integrated tower purification device according to claim 1, characterized in that: A rain cap (27) is fixedly installed on the outer wall of the receiving pipe (20), and the bottom of the rain cap (27) is attached to the top of the multiple air outlet pipes (24). The bottom radius of the rain cap (27) is greater than the length of the air outlet pipe (24).

3. The desulfurization and denitrification integrated tower purification device according to claim 1, characterized in that: The top of the annular partition (22) is fixedly connected to an annular top support device (28). The inner wall of the receiving pipe (20) is provided with a clearance annular groove at the annular slot (21) for the annular top support device (28) to slide. When the output end of the annular top support device (28) slides upward along the clearance annular groove to the end of the stroke, the output end of the annular top support device (28) blocks the annular slot (21).

4. The desulfurization and denitrification integrated tower purification device according to claim 3, characterized in that: The top of the annular top support device (28) is fixedly installed with an annular water baffle (29), and the annular water baffle (29) is provided with multiple mounting slots (30) for avoiding the air outlet pipe (24).

5. The desulfurization and denitrification integrated tower purification device according to claim 1, characterized in that: An exhaust fan (31) is fixedly installed inside the receiving pipe (20), and an annular barrier (32) for restricting the flow direction of the flue is fixedly installed on the top inner side of the receiving pipe (20).

6. The desulfurization and denitrification integrated tower purification device according to claim 1, characterized in that: The circulating pump assembly includes multiple pipes fixedly installed outside the desulfurization and denitrification integrated tower (5). The multiple pipes are respectively connected to the interior of the sulfur dioxide removal zone (15), the nitrogen oxide oxidation zone (16), the nitrogen dioxide removal zone (17), and the demisting zone (18). The sulfur dioxide removal zone (15) is connected to an alkaline circulating pump (1) through a pipe. The end of the alkaline circulating pump (1) away from the pipe is connected to an alkaline circulating pool (2). An alkaline tank (8) is provided on one side of the alkaline circulating pool (2). The nitrogen oxide oxidation zone (16) is connected to an oxidant circulating pump (4) through a pipe. The end of the oxidant circulating pump (4) away from the pipe is connected to an oxidant circulating pool (3). An oxidant tank (10) is provided on one side of the oxidant circulating pool (3). Wastewater discharge pumps (9) are provided in both the alkaline circulating pool (2) and the oxidant circulating pool (3).

7. The desulfurization and denitrification integrated tower purification device according to claim 1, characterized in that: The demisting zone (18) includes two demisters (33) fixedly installed in the desulfurization and denitrification integrated tower (5). Three annular flushing pipes are provided between the two demisters (33). The three annular flushing pipes are connected to a flushing water pump (7) through a pipeline. A clear water tank (6) is connected to the side of the flushing water pump (7) away from the pipeline.

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