Garbage incinerator SCR flue gas denitration device with online regeneration function

Abstract

The utility model relates to a garbage incinerator SCR (Selective Catalytic Reduction) flue gas denitration device with an on-line regeneration function, and aims to solve the problems that when the current denitration particles are used and the surfaces of the denitration particles adsorb a large amount of sulfate or ammonium salt, the denitration quality of the denitration particles on flue gas is influenced, the denitration particles need to be washed by deionized water after shutdown, and the denitration quality is influenced. And therefore, the denitration efficiency is reduced. The denitration mechanism comprises a denitration tower, a denitration pipe and denitration particles arranged in the denitration pipe and used for flue gas denitration, the upper end and the lower end of the denitration pipe penetrate through the upper end and the lower end of the denitration table respectively, and the upper end and the lower end of the denitration pipe are open; the discharging mechanism comprises a connecting shaft arranged in the center of an inner cavity of the denitration pipe, and the outer side of the connecting shaft is fixedly connected with a first spiral blade. The denitration device has the advantages that the denitration effect of denitration particles is guaranteed, the denitration particles can be replaced without shutdown, and the flue gas denitration efficiency is further improved.

Description

Technical Field

[0001] This utility model relates to the field of flue gas denitrification, specifically to an SCR flue gas denitrification device for a waste incinerator with online regeneration. Background Technology

[0002] Waste-to-energy incineration technology has significant advantages in reducing volume, rendering harmless, and recycling municipal solid waste. In recent years, it has gradually replaced traditional waste treatment methods such as landfill and has been widely used in my country. The number and processing capacity of waste-to-energy incineration facilities have also increased year by year. Nitrogen oxides (NOx) are one of the main pollutants produced by waste incineration and are also one of the important causes of photochemical smog and acid rain. If they are not controlled and are allowed to be emitted in large quantities, they will pose a serious threat to the ecological environment and human health. Therefore, SCR flue gas denitrification devices are needed to denitrify the flue gas produced by waste incinerators.

[0003] According to publicly available patent CN217698690U, an SCR flue gas denitrification device for a waste incinerator, specifically relating to the field of denitrification technology, includes a denitrification device body. The upper end of the denitrification device body has an outlet, the inner end of the outlet has a denitrification chamber, the lower end of the denitrification chamber has a flue gas inlet chamber, the outer end of the flue gas inlet chamber has a flue gas inlet duct, the inner end of the flue gas inlet duct has an inlet, the upper end of the denitrification chamber has a fixed filter plate, the lower end of the fixed filter plate has a long threaded rod, the outer end of the long threaded rod has an upper filter plate and a lower filter plate, and the outer ends of the upper and lower filter plates have protrusion plates. The inner end is provided with a sliding hole. In the process of realizing this utility model, the inventors discovered that at least the following problems in the prior art have not been solved: The motor drives the long threaded rod to rotate, causing the upper and lower filter plates to move in opposite directions along the sliding groove, thereby changing the density between the denitrification particles in the denitrification chamber to cope with different smoke concentrations for denitrification treatment. During use, when traditional denitrification particles are in use, when a large amount of sulfate or ammonium salt is adsorbed on the surface of the denitrification particles, it affects the denitrification quality of the flue gas, requiring the machine to be stopped and the denitrification particles to be rinsed with deionized water, thus reducing the denitrification efficiency. Therefore, a new technical solution needs to be designed to solve this problem. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology, adapt to the needs of reality, and provide an online regeneration SCR flue gas denitrification device for waste incinerators. This solves the technical problem that when denitrification particles are in use, a large amount of sulfate or ammonium salts are adsorbed on the surface of the denitrification particles, which affects the denitrification quality of the flue gas. This necessitates shutdown and rinsing of the denitrification particles with deionized water, resulting in a decrease in denitrification efficiency.

[0005] To achieve the purpose of this utility model, the technical solution adopted by this utility model is as follows: designing an online regeneration SCR flue gas denitrification device for a waste incinerator, comprising;

[0006] The denitrification mechanism includes a denitrification tower and a denitrification pipe, as well as denitrification particles for flue gas denitrification disposed inside the denitrification pipe. The upper and lower ends of the denitrification pipe pass through the upper and lower ends of the denitrification platform, respectively, and both the upper and lower ends of the denitrification pipe are open.

[0007] The discharge mechanism includes a connecting shaft located at the center of the inner cavity of the denitrification tube. A first spiral blade is fixedly connected to the outer side of the connecting shaft, and the outer side of the first spiral blade moves against the inner wall of the denitrification tube. A cap is threaded on the outer side of the bottom of the denitrification tube. A feed hopper is fixedly connected to the top of the denitrification tube. A drive mechanism is provided inside the feed hopper, and the drive end of the drive mechanism is connected to the connecting shaft.

[0008] Preferably, the system further includes a flushing and circulation mechanism, which includes a feeding pipe disposed on one side of the denitrification tower. A drive shaft is rotatably connected between the upper and lower ends of the inner cavity of the feeding pipe via bearings. A second spiral blade is fixedly connected to the outer side of the drive shaft. The outer side of the second spiral blade is fitted against the inner wall of the feeding pipe. A feed pipe is fixedly connected to the lower side of the feeding pipe near the denitrification tower. A receiving hopper is fixedly connected to the other end of the feed pipe. A discharge pipe is fixedly connected to the upper side of the feeding pipe near the feeding hopper. A hot air pipe, a reagent pipe, and a drain pipe are fixedly connected to the end of the feeding pipe away from the feed pipe. The hot air pipe, reagent pipe, and drain pipe are sequentially connected to the feeding pipe from top to bottom. A first drive motor is fixedly installed at the top of the feeding pipe. The drive end of the first drive motor rotates through the feeding pipe and is connected to the drive shaft via a coupling.

[0009] Preferably, the driving mechanism includes a connecting plate fixedly connected between the two sides of the inner cavity of the feed hopper, a second drive motor is fixedly mounted on the connecting plate, the driving end of the second drive motor rotates through the connecting plate and is connected to the connecting shaft through a coupling, and the width of the connecting plate is smaller than the inner diameter of the feed hopper.

[0010] Preferably, a protective cover is provided on the outside of the second drive motor, and the protective cover is connected to the connecting plate by bolts.

[0011] Preferably, the second spiral blade has multiple filter holes, and the size of the filter holes is smaller than the size of the denitrification particles.

[0012] Preferably, the feed pipe is inclined at one end toward the feeding pipe, and the discharge pipe is inclined at one end toward the feed hopper and corresponds to the top opening of the feed hopper.

[0013] Preferably, an air inlet pipe is provided on the lower side of one end of the denitrification platform, and an exhaust pipe is provided on the upper side of the end of the denitrification platform away from the air inlet pipe. The air inlet pipe and the exhaust pipe both pass through the denitrification platform and are connected to the denitrification pipe at the ends near the denitrification platform, and the air inlet pipe and the exhaust pipe are both connected to the inner cavity of the denitrification pipe.

[0014] Preferably, an induced draft fan is installed inside the exhaust pipe, and an installation rod is fixedly connected between the induced draft fan and the inner wall of the exhaust pipe.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. This utility model combines a second drive motor, a first spiral blade, a denitrification tube, denitrification particles, a cover, and a feed hopper. By starting the second drive motor, the first spiral blade rotates, discharging the denitrification particles from the bottom of the denitrification tube. At the same time, the denitrification particles in the feed hopper are transported into the denitrification tube by the first spiral blade. This automatically discharges and refills the denitrification tube with the ineffective denitrification particles, thus ensuring the denitrification effect of the particles and eliminating the need to stop the machine to replace the particles, thereby further improving the efficiency of flue gas denitrification.

[0017] 2. This utility model combines a first drive motor, a second spiral blade, a reagent tube, a hot air tube, a feed pipe, a discharge pipe, and a receiving structure. By starting the first drive motor, the second spiral blade is driven to rotate, thereby conveying the denitrification particles upward. While the denitrification particles are being conveyed, the sulfate or ammonium salts on the surface of the denitrification particles are washed off and the particles are dried. The dried denitrification particles are then added to the feed hopper through the discharge pipe for reuse, thus enabling the regeneration and recycling of the denitrification particles. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is the overall sectional front view of the present invention;

[0020] Figure 3 This is a front view of the connection between the exhaust pipe and the induced draft fan of this utility model.

[0021] In the diagram: 1. Denitrification platform; 11. Air inlet pipe; 12. Exhaust pipe; 2. Denitrification pipe; 21. Feed hopper; 22. Connecting shaft; 23. First spiral blade; 24. Cover; 3. Feeding pipe; 31. Receiving hopper; 32. Feeding pipe; 33. Drain pipe; 34. Chemical pipe; 35. Hot air pipe; 36. First drive motor; 37. Discharge pipe; 38. Drive shaft; 39. Second spiral blade; 310. Filter hole; 4. Exhaust fan; 41. Mounting rod; 5. Connecting plate; 51. Second drive motor; 52. Protective cover. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0023] Example 1: An SCR flue gas denitrification device for a waste incinerator with online regeneration, see [link to example]. Figures 1 to 3 The system includes: a denitrification mechanism, comprising a denitrification tower and a denitrification pipe 2, and denitrification particles disposed within the denitrification pipe 2 for flue gas denitrification. The upper and lower ends of the denitrification pipe 2 pass through the upper and lower ends of a denitrification platform 1, respectively. Both ends of the denitrification pipe 2 are open. An air inlet pipe 11 is disposed on the lower side of one end of the denitrification platform 1, and an exhaust pipe 12 is disposed on the upper side of the end of the denitrification platform 1 furthest from the air inlet pipe 11. Both the air inlet pipe 11 and the exhaust pipe 12 pass through the denitrification platform 1 and connect to the denitrification pipe 2 at their ends near the denitrification platform 1, and both the air inlet pipe 11 and the exhaust pipe 12 communicate with the inner cavity of the denitrification pipe 2; and a discharge mechanism, comprising a discharge mechanism located at the center of the inner cavity of the denitrification pipe 2. A connecting shaft 22 is provided at the connection point. A first spiral blade 23 is fixedly connected to the outer side of the connecting shaft 22, and the outer side of the first spiral blade 23 moves against the inner wall of the denitrification pipe 2. A cap 24 is threaded on the outer side of the bottom of the denitrification pipe 2. A feed hopper 21 is fixedly connected to the top of the denitrification pipe 2. A driving mechanism is provided inside the feed hopper 21. The driving mechanism includes a connecting plate 5 fixedly connected between the two sides of the inner cavity of the feed hopper 21. A second drive motor 51 is fixedly installed on the connecting plate 5. The driving end of the second drive motor 51 rotates through the connecting plate 5 and is connected to the connecting shaft 22 through a coupling. The width of the connecting plate 5 is smaller than the inner diameter of the feed hopper 21.

[0024] During operation, flue gas is introduced into the denitrification pipe 2 from the bottom through the intake pipe 11, allowing the flue gas to flow from bottom to top. The denitrification particles denitrate the flue gas. When the denitrification effect of the denitrification particles decreases, the cover 24 is removed from the denitrification pipe 2. Then, the second drive motor 51 is started to drive the first spiral blade 23 to rotate, discharging the denitrification particles from the bottom of the denitrification pipe 2. At this time, the denitrification particles in the feed hopper 21 are transported into the denitrification pipe 2 through the first spiral blade 23, thereby automatically discharging and refilling the denitrification particles in the denitrification pipe 2, ensuring the denitrification effect of the denitrification particles, and eliminating the need to stop the machine to replace the denitrification particles, further improving the efficiency of flue gas denitrification. When the first spiral blade 23 is not rotating, it can cause the flue gas to spiral upward in the denitrification pipe 2, thereby increasing the distance the flue gas moves in the denitrification pipe 2, thus allowing the flue gas to fully contact the denitrification particles in the denitrification pipe 2, further improving the quality of flue gas denitrification.

[0025] For details, see Figure 2The system also includes a flushing and circulation mechanism, which includes a feeding pipe 3 disposed on one side of the denitrification tower. A drive shaft 38 is rotatably connected between the upper and lower ends of the inner cavity of the feeding pipe 3 via bearings. A second spiral blade 39 is fixedly connected to the outer side of the drive shaft 38, and the outer side of the second spiral blade 39 is fitted against the inner wall of the feeding pipe 3. A feed pipe 32 is fixedly connected to the lower side of the feeding pipe 3 near the denitrification tower. A receiving hopper 31 is fixedly connected to the other end of the feed pipe 3. A discharge pipe 37 is fixedly connected to the upper side of the feeding pipe 3 near the feeding hopper 21. A hot air pipe 35, a reagent pipe 34, and a drain pipe 33 are fixedly connected to the end of the feeding pipe 3 away from the feed pipe 32. The hot air pipe 35, the reagent pipe 34, and the drain pipe 33 are sequentially connected to the feeding pipe 3 from top to bottom. A first drive motor 36 is fixedly installed at the top of the feeding pipe 3. The drive end of the first drive motor 36 rotates... The feed pipe 3 is connected to the drive shaft 38 via a coupling. When the denitrification particles are discharged from the bottom of the denitrification pipe 2, they are collected by the collection hopper 31 and then conveyed into the feed pipe 3 via the feed pipe 32. The first drive motor 36 is then started to drive the second spiral blade 39 to rotate, thereby conveying the denitrification particles upward. While the denitrification particles are being conveyed, deionized water is added into the feed pipe 3 via the reagent pipe 34 to wash off the sulfate or ammonium salts on the surface of the denitrification particles during conveying, thereby restoring the denitrification effect of the denitrification particles. The washed denitrification particles continue to be conveyed in the feed pipe 3 and are then connected to an external hot air blower via the hot air pipe 35 to blow hot air into the feed pipe 3, thereby drying the washed denitrification particles. The dried denitrification particles are then added to the feed hopper 21 via the discharge pipe 37 for reuse, thus enabling the regeneration and recycling of the denitrification particles.

[0026] It is worth noting that, see Figure 2 A protective cover 52 is provided on the outside of the second drive motor 51. The protective cover 52 is connected to the connecting plate 5 by bolts. The protective cover 52 can shield the second drive motor 51 and prevent denitrification particles from contacting the second drive motor 51 and causing damage.

[0027] It is worth noting that, see Figure 2 The second spiral blade 39 has multiple filter holes 310, and the size of the filter holes 310 is smaller than the size of the denitrification particles. The filter holes 310 facilitate the passage of deionized water and hot air during rinsing. This not only facilitates the discharge of wastewater generated during rinsing through the drain pipe 33, but also facilitates the passage of hot air through the second spiral blade 39, thereby improving the drying efficiency of the denitrification particles.

[0028] It is worth mentioning that, see Figure 2The feed pipe 32 is inclined to one end of the feeding pipe 3 to facilitate the denitrification particles in the feed hopper 31 to be guided into the feeding hopper for washing and drying. The discharge pipe 37 is inclined to one end of the feed hopper 21 and corresponds to the top opening of the feed hopper 21 to facilitate the discharge of the washed and dried denitrification particles from the feeding pipe 3 into the feed hopper 21 for reuse.

[0029] It is worth mentioning that, see Figure 3 An induced draft fan 4 is installed inside the exhaust pipe 12. An installation rod 41 is fixedly connected between the induced draft fan 4 and the inner wall of the exhaust pipe 12. The induced draft fan 4 can not only speed up the discharge of flue gas from the denitrification pipe 2 and further improve the efficiency of flue gas denitrification, but also generate negative pressure inside the denitrification pipe 2 when the denitrification particles inside the denitrification pipe 2 are replaced. This causes the air at the bottom of the denitrification pipe 2 to be drawn into the denitrification pipe 2, preventing the flue gas from being discharged from the bottom of the denitrification pipe 2 and causing pollution by releasing undenitrified flue gas into the air.

[0030] In addition, all components designed in this utility model are general standard parts or components known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods. Those skilled in the art can fully implement them, so there is no need to elaborate. The content protected by this utility model does not involve improvements to the internal structure and method.

[0031] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.

Claims

1. A waste incinerator SCR flue gas denitrification device with online regeneration, characterized in that, include; The denitrification mechanism includes a denitrification tower and a denitrification pipe (2) and denitrification particles for flue gas denitrification installed in the denitrification pipe (2). The upper and lower ends of the denitrification pipe (2) pass through the upper and lower ends of the denitrification platform (1) respectively, and both the upper and lower ends of the denitrification pipe (2) are open. The discharge mechanism includes a connecting shaft (22) located at the center of the inner cavity of the denitrification tube (2). A first spiral blade (23) is fixedly connected to the outer side of the connecting shaft (22), and the outer side of the first spiral blade (23) moves against the inner wall of the denitrification tube (2). A cap (24) is threaded on the outer side of the bottom of the denitrification tube (2). A feed hopper (21) is fixedly connected to the top of the denitrification tube (2). A driving mechanism is provided inside the feed hopper (21), and the driving end of the driving mechanism is connected to the connecting shaft (22).

2. The waste incinerator SCR flue gas denitrification device with online regeneration as described in claim 1, characterized in that, It also includes a flushing and circulation mechanism, which includes a feeding pipe (3) disposed on one side of the denitrification tower. The upper and lower ends of the inner cavity of the feeding pipe (3) are rotatably connected to a drive shaft (38) via bearings. A second spiral blade (39) is fixedly connected to the outer side of the drive shaft (38). The outer side of the second spiral blade (39) is fitted against the inner wall of the feeding pipe (3). The lower side of the feeding pipe (3) near the denitrification tower is fixedly connected to an inlet pipe (32). The other end of the inlet pipe (32) is fixedly connected to a receiving hopper (31). The upper side of the end of the pipe (3) near the feed hopper (21) is fixedly connected to the discharge pipe (37). The end of the feeding pipe (3) away from the feed pipe (32) is fixedly connected to the hot air pipe (35), the medicine pipe (34) and the drain pipe (33). The hot air pipe (35), the medicine pipe (34) and the drain pipe (33) are connected to the feeding pipe (3) from top to bottom. The top of the feeding pipe (3) is fixedly installed with a first drive motor (36). The drive end of the first drive motor (36) rotates through the feeding pipe (3) and is connected to the drive shaft (38) through a coupling.

3. The waste incinerator SCR flue gas denitrification device with online regeneration as described in claim 1, characterized in that, The driving mechanism includes a connecting plate (5) fixedly connected between the two sides of the inner cavity of the feed hopper (21). A second drive motor (51) is fixedly installed on the connecting plate (5). The driving end of the second drive motor (51) rotates through the connecting plate (5) and is connected to the connecting shaft (22) through a coupling. The width of the connecting plate (5) is smaller than the inner diameter of the feed hopper (21).

4. The waste incinerator SCR flue gas denitrification device with online regeneration as described in claim 3, characterized in that, The second drive motor (51) is provided with a protective cover (52) on its outer side, and the protective cover (52) is connected to the connecting plate (5) by bolts.

5. The waste incinerator SCR flue gas denitrification device with online regeneration as described in claim 2, characterized in that, The second spiral blade (39) has multiple filter holes (310), and the size of the filter holes (310) is smaller than the size of the denitrification particles.

6. The waste incinerator SCR flue gas denitrification device with online regeneration as described in claim 2, characterized in that, The feed pipe (32) is inclined toward one end of the feed pipe (3), and the discharge pipe (37) is inclined toward one end of the feed hopper (21) and corresponds to the top opening of the feed hopper (21).

7. The waste incinerator SCR flue gas denitrification device with online regeneration as described in claim 2, characterized in that, An air inlet pipe (11) is provided on the lower side of one end of the denitrification platform (1), and an exhaust pipe (12) is provided on the upper side of the end of the denitrification platform (1) away from the air inlet pipe (11). The air inlet pipe (11) and the exhaust pipe (12) are both connected to the denitrification pipe (2) through the denitrification platform (1) at the end near the denitrification platform (1). The air inlet pipe (11) and the exhaust pipe (12) are both connected to the inner cavity of the denitrification pipe (2).

8. The waste incinerator SCR flue gas denitrification device with online regeneration as described in claim 7, characterized in that, An induced draft fan (4) is installed inside the exhaust pipe (12), and an installation rod (41) is fixedly connected between the induced draft fan (4) and the inner wall of the exhaust pipe (12).

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