A new type of SCR denitration device for power plant boilers

Abstract

The utility model relates to a kind of new SCR denitration device of power station boiler in flue gas denitration technical field, including boiler, the inside of boiler is sequentially provided with first baffle and second baffle from top to bottom, the boiler is divided into three cavity structures by first baffle and second baffle, three cavity structures are sequentially filtering cavity, denitration cavity and exhaust cavity from top to bottom, the inside of boiler is provided with spraying mechanism, the input end of spraying mechanism is arranged in filtering cavity, the output end of spraying mechanism is arranged in denitration cavity, the device is filtered impurity by catalyst using filter core, simultaneously, filter cavity is pressurized using booster pump, so that catalyst can be quickly filtered from filter core to connecting pipe, then spraying mechanism is arranged in filtering cavity, and driving mechanism is used to drive connecting pipe and water outlet pipe to rotate, so that catalyst can be fully reacted with nitrogen oxides in flue gas, improve catalytic effect and efficiency.

Description

Technical Field

[0001] This utility model relates to the field of flue gas denitrification technology, and in particular to a novel SCR denitrification device for power plant boilers. Background Technology

[0002] With the acceleration of industrialization and urbanization, large amounts of fossil fuels are burned in power plant boilers, resulting in a sharp increase in nitrogen oxide (NOx) emissions, which poses a serious threat to the environment and human health. In the treatment process, catalytic reduction is usually adopted. Under the action of a catalyst, reducing agents such as ammonia (NH3) or urea are injected into the flue gas to selectively reduce NOx to nitrogen (N2) and water (H2O). The advantages of this method are high denitrification efficiency, which can generally reach more than 80%-90%; mature technology, stable and reliable operation; minimal impact on boiler operation; and wide applicability.

[0003] In existing methods of denitrification using SCR (Sequencing Controlled Reduction) of flue gas, the reducing agent contains many impurities. Larger impurities can easily clog the nozzle outlet when they enter the nozzle through the delivery pipeline, thus affecting the nozzle's spraying effect. To address this, we propose a new type of SCR denitrification device for power plant boilers. Utility Model Content

[0004] To address the aforementioned issues, this invention provides a novel SCR denitrification device for power plant boilers, which offers the advantage of catalyst filtration and features high spray pressure to comprehensively cover the catalyst.

[0005] The technical solution of this utility model is: A novel SCR denitrification device for a power plant boiler includes a boiler. The boiler's interior is divided into three chambers by a first baffle and a second baffle, arranged sequentially from top to bottom. These three chambers are, from top to bottom, a filtration chamber, a denitrification chamber, and an exhaust chamber. A spraying mechanism is installed inside the boiler. The input end of the spraying mechanism is located in the filtration chamber, and the output end of the spraying mechanism is located in the denitrification chamber. A filtration mechanism is installed inside the filtration chamber. Support legs are also provided at the bottom of the boiler.

[0006] In a further technical solution, an air inlet pipe and an air outlet pipe are respectively installed on one side of the boiler. The air inlet pipe and the air outlet pipe are controlled by a control valve. One end of the air inlet pipe is connected to the denitrification chamber, and one end of the air outlet pipe is connected to the exhaust chamber. A control valve is provided at the bottom of the second partition, and a filter screen is provided inside the exhaust chamber.

[0007] In a further technical solution, a conveying mechanism is provided on one side of the boiler to convey the catalyst into the filter chamber. The conveying mechanism includes a storage chamber, and a conveying pipe is provided on one side of the storage chamber. The other end of the conveying pipe is located at the input end of a water pump located at the top of the boiler. The output end of the water pump is connected to the interior of the filter chamber. The conveying pipe is installed by two fixing rings fixedly installed on one side of the boiler.

[0008] In a further technical solution, the spraying mechanism includes a connecting pipe, a driving mechanism is provided at the top of the connecting pipe, water outlet pipes are connected to both sides of the bottom end of the connecting pipe, multiple nozzles are provided on the inner side of the water outlet pipe, and multiple through holes are opened on the outer side of the connecting pipe.

[0009] In a further technical solution, the filtration mechanism includes a filter element, which is disposed on the outside of the connecting pipe, and a retaining ring that can move up and down is installed at the top of the filter element.

[0010] In a further technical solution, the drive mechanism includes a motor mounted on the top of the boiler, and the output shaft of the motor is connected to a connecting pipe.

[0011] In a further technical solution, a pressurization mechanism is also provided on one side of the top of the boiler. The pressurization mechanism includes a pressurization pump, and the output end of the pressurization pump is connected to the interior of the filter chamber for pressurization.

[0012] In a further technical solution, a limiting plate is fixedly connected to the top of the retaining ring, and multiple springs are provided on the upper surface of the limiting plate. Both the retaining ring and the limiting plate adopt a circular structure.

[0013] The beneficial effects of this utility model are: This device filters impurities from the catalyst using a filter element and pressurizes the filter chamber with a booster pump, allowing the catalyst to be quickly filtered from the filter element into the connecting pipe. The catalyst is then sprayed into the filter chamber through the water outlet pipe and nozzle. A drive mechanism rotates the connecting pipe and the water outlet pipe, enabling the catalyst to fully react with nitrogen oxides in the flue gas, thereby improving the catalytic effect and efficiency.

[0014] The device also uses a water pump to transport the catalyst into the filtration chamber. After catalysis, the catalyst flows into the storage chamber. This conveying mechanism allows the catalyst to be reused multiple times. When the catalyst no longer achieves the expected effect, it can be replaced manually, saving the cost of using the catalyst. At the same time, the automated processing can save on personnel costs. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model; Figure 2 This is a partial structural schematic diagram of the filter element according to an embodiment of the present utility model; Figure 3 This is an embodiment of the present utility model. Figure 1 The structural diagram at point A in the diagram.

[0016] Explanation of reference numerals in the attached figures: 1. Boiler; 2. Filter chamber; 3. Denitrification chamber; 4. Exhaust chamber; 5. Support leg; 6. Inlet pipe; 7. Outlet pipe; 8. Storage chamber; 9. Delivery pipe; 10. Water pump; 11. Filter element; 12. Motor; 13. Booster pump; 14. Fixing ring; 15. Second partition; 16. Control valve; 17. Filter screen; 18. Connecting pipe; 19. Water outlet pipe; 20. Nozzle; 21. First partition; 22. Snap ring; 23. Limiting plate; 24. Spring. Detailed Implementation

[0017] The embodiments of this utility model will be further described below with reference to the accompanying drawings. Example:

[0018] like Figures 1-3 As shown, a novel SCR denitrification device for a power plant boiler includes a boiler 1. The boiler 1 has a first partition 21 and a second partition 15 arranged sequentially from top to bottom, dividing it into three chambers: a filter chamber 2, a denitrification chamber 3, and an exhaust chamber 4. A spraying mechanism is installed inside the boiler 1, with its input end in the filter chamber 2 and its output end in the denitrification chamber 3. A filter is installed inside the filter chamber 2. A support leg 5 is also installed at the bottom of the boiler 1. An inlet pipe 6 and an outlet pipe 7 are installed on one side of the boiler 1, controlled by a control valve. One end of the inlet pipe 6 connects to the denitrification chamber 3, and one end of the outlet pipe 7 connects to the exhaust chamber 4. A control valve 16 is installed at the bottom of the second partition 15. A spraying mechanism is installed inside the exhaust chamber 4. The filter screen 17 and the spraying mechanism include a connecting pipe 18. A drive mechanism is provided at the top of the connecting pipe 18. Water outlet pipes 19 are connected to both sides of the bottom end of the connecting pipe 18. Multiple nozzles 20 are provided on the inner side of the water outlet pipes 19. Multiple through holes are opened on the outer side of the connecting pipe 18. The filter mechanism includes a filter element 11, which is located on the outer side of the connecting pipe 18. A retaining ring 22 that can move up and down is installed at the top of the filter element 11. The drive mechanism includes a motor 12 located at the top of the boiler 1. The output shaft of the motor 12 is connected to the connecting pipe 18. A pressurizing mechanism is also provided on one side of the top of the boiler 1. The pressurizing mechanism includes a pressurizing pump 13. The output end of the pressurizing pump 13 is connected to the interior of the filter chamber 2 for pressurization. A limiting plate 23 is fixedly connected to the top of the retaining ring 22. Multiple springs 24 are provided on the upper surface of the limiting plate 23. Both the retaining ring 22 and the limiting plate 23 adopt a circular structure.

[0019] The working principle of the above technical solution is as follows: The device delivers the catalyst into the filter chamber 2, where filter element 11 filters out impurities. Simultaneously, a booster pump 13 pressurizes the filter chamber 2, allowing the catalyst to quickly pass from filter element 11 into the connecting pipe 18. This increases the pressure of the spray nozzle 20, resulting in a more ideal spray effect. The catalyst is then sprayed into the filter chamber 2 through the water outlet pipe 19 and the spray nozzle 20. A drive mechanism rotates the connecting pipe 18 and the water outlet pipe 19, ensuring the catalyst fully reacts with nitrogen oxides in the flue gas. To improve catalytic effect and efficiency, after a long period of time, filter element 11 can be moved into the top cover of boiler 1 by pressing the retaining ring 22 upwards, and the drive mechanism can be removed. At this time, filter element 11 can be removed and replaced to avoid affecting the filtration effect. The flue gas enters the denitrification chamber 3 through the inlet pipe 6. After catalysis is completed, the control valve 16 is opened, and the flue gas and catalyst flow into the exhaust chamber 4 through the control valve 16. The flue gas is discharged from the outlet pipe 7, while the catalyst flows into the storage chamber 8 for storage after being filtered through the primary screen of the filter screen 17 for the next use.

[0020] In another embodiment, such as Figures 1-3As shown, a novel SCR denitrification device for a power plant boiler includes a boiler 1. The boiler 1 has a first baffle 21 and a second baffle 15 arranged sequentially from top to bottom, dividing it into three chambers: a filter chamber 2, a denitrification chamber 3, and an exhaust chamber 4. A spraying mechanism is installed inside the boiler 1, with its input end located in the filter chamber 2 and its output end located in the denitrification chamber 3. A filter mechanism is installed inside the filter chamber 2. Boiler 1 has an inlet pipe 6 and an outlet pipe 7 installed on one side. The inlet pipe 6 and outlet pipe 7 are controlled by a control valve. One end of the inlet pipe 6 is connected to the denitrification chamber 3, and one end of the outlet pipe 7 is connected to the exhaust chamber 4. A control valve 16 is installed at the bottom of the second partition 15. A filter screen 17 is installed inside the exhaust chamber 4. A conveying mechanism is installed on one side of boiler 1 to convey the catalyst to the filter chamber 2. The conveying mechanism includes a storage chamber 8. A conveying pipe 9 is installed on one side of the storage chamber 8, and the other end of the conveying pipe 9 is... The water pump 10 is installed at the top of the boiler 1. The output of the water pump 10 is connected to the interior of the filter chamber 2. The delivery pipe 9 is installed via two fixing rings 14 fixedly mounted on one side of the boiler 1. The spraying mechanism includes a connecting pipe 18, with a drive mechanism at its top and outlet pipes 19 connected to both sides of its bottom. Multiple nozzles 20 are installed inside the outlet pipes 19, and multiple through holes are opened on the outside of the connecting pipe 18. The filtration mechanism includes a filter element 11, which is installed on the connecting pipe 18. On the outside, a retaining ring 22 that can move up and down is installed at the top of the filter element 11. The driving mechanism includes a motor 12 located at the top of the boiler 1. The output shaft of the motor 12 is connected to the connecting pipe 18. A pressurizing mechanism is also provided on one side of the top of the boiler 1. The pressurizing mechanism includes a pressurizing pump 13. The output end of the pressurizing pump 13 is connected to the inside of the filter chamber 2 for pressurization. A limiting plate 23 is fixedly connected to the top of the retaining ring 22. Multiple springs 24 are provided on the upper surface of the limiting plate 23. Both the retaining ring 22 and the limiting plate 23 adopt a circular structure.

[0021] The working principle of the above technical solution is as follows: This embodiment adds a catalyst delivery mechanism to the previous embodiment. The device can use a water pump 10 to deliver the catalyst into the filter chamber 2. After catalysis, the catalyst will flow into the storage chamber 8. The delivery mechanism allows the catalyst to be used multiple times. When the catalyst does not achieve the expected effect, it can be replaced manually, saving the cost of using the catalyst. At the same time, the automated processing can save labor costs. The designed fixing ring 14 can fix the delivery pipe 9.

[0022] The above embodiments merely illustrate specific implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model.

Claims

1. A novel SCR denitrification device for power plant boilers, comprising a boiler (1), characterized in that: The boiler (1) is provided with a first partition (21) and a second partition (15) from top to bottom. The boiler (1) is divided into three chamber structures by the first partition (21) and the second partition (15). The three chamber structures are, from top to bottom, a filter chamber (2), a denitrification chamber (3) and an exhaust chamber (4). The boiler (1) is provided with a spraying mechanism. The input end of the spraying mechanism is located in the filter chamber (2) and the output end of the spraying mechanism is located in the denitrification chamber (3). The filter chamber (2) is provided with a filter mechanism. The bottom of the boiler (1) is also provided with a support leg (5).

2. The novel SCR denitrification device for power plant boilers according to claim 1, characterized in that: An air inlet pipe (6) and an air outlet pipe (7) are respectively installed on one side of the boiler (1). The air inlet pipe (6) and the air outlet pipe (7) are controlled by a control valve. One end of the air inlet pipe (6) is connected to the denitrification chamber (3), and one end of the air outlet pipe (7) is connected to the exhaust chamber (4). A control valve (16) is provided at the bottom of the second partition (15), and a filter screen (17) is provided inside the exhaust chamber (4).

3. The novel SCR denitrification device for power plant boilers according to claim 2, characterized in that: A conveying mechanism is provided on one side of the boiler (1) to convey the catalyst to the filter chamber (2). The conveying mechanism includes a storage chamber (8). A conveying pipe (9) is provided on one side of the storage chamber (8). The other end of the conveying pipe (9) is located at the input end of a water pump (10) located at the top of the boiler (1). The output end of the water pump (10) is connected to the interior of the filter chamber (2). The conveying pipe (9) is installed by two fixing rings (14) fixedly installed on one side of the boiler (1).

4. A novel SCR denitrification device for power plant boilers according to claim 2, characterized in that: The spraying mechanism includes a connecting pipe (18), a driving mechanism is provided at the top of the connecting pipe (18), and water outlet pipes (19) are connected to both sides of the bottom end of the connecting pipe (18). Multiple nozzles (20) are provided on the inner side of the water outlet pipe (19), and multiple through holes are opened on the outer side of the connecting pipe (18).

5. A novel SCR denitrification device for power plant boilers according to claim 2, characterized in that: The filtration mechanism includes a filter element (11), which is disposed on the outside of the connecting pipe (18), and a retaining ring (22) that can move up and down is installed on the top of the filter element (11).

6. A novel SCR denitrification device for power plant boilers according to claim 4, characterized in that: The drive mechanism includes a motor (12) mounted on the top of the boiler (1), and the output shaft of the motor (12) is connected to the connecting pipe (18).

7. A novel SCR denitrification device for power plant boilers according to claim 3 or 4, characterized in that: A pressurization mechanism is also provided on one side of the top of the boiler (1). The pressurization mechanism includes a pressurization pump (13), and the output end of the pressurization pump (13) is connected to the interior of the filter chamber (2) for pressurization.

8. A novel SCR denitrification device for power plant boilers according to claim 5, characterized in that: The top end of the retaining ring (22) is fixedly connected to a limiting plate (23), and the upper surface of the limiting plate (23) is provided with multiple springs (24). Both the retaining ring (22) and the limiting plate (23) adopt a circular structure.

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