Venturi nozzle rake soot blowing device for SCR denitrification of high dust flue gas

Abstract

This utility model discloses a Venturi nozzle rake-type soot blowing device for SCR denitrification of high-dust flue gas, belonging to the technical field of soot blowing devices. Key technical features include a fan structure with a filter box on the right side. An air inlet pipe is fixedly connected to the right side of the filter box, and a diversion pipe is located at the bottom of the air inlet pipe. A soot blowing mechanism is fixedly connected to the bottom of the diversion pipe. The soot blowing mechanism includes a connecting pipe, a connecting tube, and a Venturi nozzle. The top of the connecting pipe is fixedly connected to the bottom of the diversion pipe. This invention solves the problems of existing Venturi nozzle rake-type soot blowing devices for SCR denitrification of high-dust flue gas, where the gas is mostly unfiltered, and impurities easily enter the soot blowing components, causing blockage or wear, reducing soot blowing efficiency and equipment lifespan. Furthermore, the connection method of the soot blowing components is inconvenient for disassembly and maintenance, making rapid repair difficult in case of malfunctions, resulting in long downtime and reduced work efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of soot blowing devices, and in particular to a Venturi nozzle rake-type soot blowing device for SCR denitrification of high-dust flue gas. Background Technology

[0002] The Venturi nozzle rake soot blowing device for high-dust flue gas SCR denitrification is a specialized piece of equipment used in selective catalytic reduction (SCR) denitrification systems for high-dust flue gas. It generates a specific airflow through the Venturi nozzle to periodically purge the catalyst and other components inside the SCR denitrification device, removing dust and other impurities accumulated during operation. This maintains the efficient and stable operation of the denitrification system, ensures denitrification efficiency, and prevents excessive dust accumulation from affecting catalyst activity and flue gas flow. It is suitable for various industrial scenarios with high-dust flue gas emissions that employ SCR denitrification technology.

[0003] In recent years, many measures have been proposed to prevent high-temperature corrosion, but the results have been unsatisfactory, with the following problems: Opening holes in the water-cooled walls to add wall-mounted air results in large air leakage, severely affecting normal combustion inside the furnace, leading to an increase in the excess air coefficient and NOx emissions; using side air to suppress corrosion results in low air volume and dynamic pressure, failing to effectively change the atmosphere composition at the wall-mounted area; furthermore, the control system cannot achieve intelligent automation, requiring operators to manually judge and adjust the high-temperature corrosion prevention system, increasing the workload of power plant staff and making it prone to human error.

[0004] An existing patent (publication number: CN206755199U) discloses a sootblower device that can alleviate high-temperature corrosion of water-cooled walls. It features a simple structure, economical cost, and stable operation, effectively protecting the furnace water-cooled walls. This utility model includes a sootblowing system and an automatic control system. The sootblowing system comprises a sleeve-type nozzle, a Venturi nozzle, a spiral tube, a sootblower valve, and an air valve. The outer tube of the nozzle is supplied with compressed air drawn from the secondary air box, serving as the wall-adhering air medium. The inner tube is supplied with high-temperature, high-pressure steam drawn from the reheater inlet header, also serving as the sootblowing medium. The sootblower valve and air valve open alternately, allowing compressed air to be blown into the furnace through the nozzle during the sootblowing intervals, thereby forming a wall-adhering air protective film at the water-cooled walls, protecting the water-cooled wall pipes.

[0005] To address the aforementioned issues, existing patents offer solutions. However, in the current high-dust flue gas SCR denitrification Venturi nozzle rake soot blowing device, most of the gas is not effectively filtered during use. Impurities easily enter the soot blowing components, causing blockages or wear, reducing the soot blowing effect and equipment lifespan. Furthermore, the connection method of the soot blowing components is not convenient for disassembly and maintenance, and it is difficult to quickly repair when a fault occurs, resulting in long equipment downtime and affecting work efficiency.

[0006] To address this, a Venturi nozzle rake-type soot blowing device for SCR denitrification of high-dust flue gas is proposed. Utility Model Content

[0007] The purpose of this invention is to provide a Venturi nozzle rake-type soot blowing device for SCR denitrification of high-dust flue gas. This device solves the problems of existing Venturi nozzle rake-type soot blowing devices for SCR denitrification of high-dust flue gas, where the gas is mostly unfiltered, and impurities easily enter the soot blowing components, causing blockage or wear, reducing the soot blowing effect and equipment lifespan. Furthermore, the connection method of the soot blowing components is not convenient for disassembly and maintenance, and it is difficult to quickly repair when a fault occurs, resulting in long equipment downtime and affecting work efficiency.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a Venturi nozzle rake-type soot blowing device for SCR denitrification of high dust flue gas, including a fan structure, a filter box is provided on the right side of the fan structure, an air inlet pipe is fixedly connected to the right side of the filter box, a diversion pipe is provided at the bottom of the air inlet pipe, and a soot blowing mechanism is fixedly connected to the bottom of the diversion pipe.

[0009] The soot blowing mechanism includes a connecting pipe, a connecting tube, and a venturi nozzle. The top of the connecting pipe is fixedly connected to the bottom of the diverter pipe, the bottom of the connecting pipe is fixedly connected to the top of the connecting tube, and the surface of the connecting tube is threadedly connected to the inner wall of the venturi nozzle.

[0010] Preferably, a first sealing ring is bonded to the inner wall of the connecting pipe, and the surface of the first sealing ring is engaged with the inner wall of the Venturi nozzle.

[0011] Preferably, the inner wall of the Venturi nozzle is provided with a sealing groove for use with the first sealing ring, and the inner wall of the Venturi nozzle is provided with internal threads.

[0012] Preferably, the top of the diversion pipe is fixedly connected to a transmission pipe, and the top of the transmission pipe is fixedly connected to the bottom of the air inlet pipe.

[0013] Preferably, a connecting pipe is fixedly connected to the right side of the fan structure, and the right side of the connecting pipe is fixedly connected to the left side of the filter box.

[0014] Preferably, a dust filter rack is movably connected to the inner wall of the filter box, and a baffle is bolted to the front side of the dust filter rack, the surface of which is bolted to the inner wall of the filter box.

[0015] Preferably, a second sealing ring is adhered to the inner wall of the baffle, and the surface of the second sealing ring is engaged with the inner wall of the filter box.

[0016] Preferably, a filter plate is inserted into the inner wall of the dust filter rack, and a filter screen is fixedly connected to the inner wall of the filter plate.

[0017] Preferably, the inner wall of the dust filter rack is provided with an installation groove for use with the filter plate, and the inner wall of the dust filter rack is provided with an air inlet groove.

[0018] Preferably, a positioning plate is provided on the surface of the connecting pipe, and a support component is bolted to the bottom of the positioning plate.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] 1. This application sets up a soot blowing mechanism in which the connecting pipe and the connecting tube are connected to the Venturi nozzle by threads. This connection method is easy to disassemble and install. When the Venturi nozzle is worn or blocked, it can be quickly replaced or cleaned and maintained, which improves the maintainability of the overall equipment, reduces downtime caused by equipment failure, and ensures the continuous operation efficiency of denitrification.

[0021] 2. This application incorporates a filter box, which filters the gas output from the fan structure, effectively removing impurity particles and preventing these impurities from entering the soot blowing mechanism. This prevents components such as the Venturi nozzle from being clogged or worn by impurities, thus affecting the soot blowing effect and service life. It ensures the long-term stable and efficient operation of the soot blowing mechanism and maintains the normal working environment for high-dust flue gas SCR denitrification. Attached Figure Description

[0022] Figure 1 This is an overall structural diagram of the Venturi nozzle rake-type soot blowing device for SCR denitrification of high-dust flue gas according to this utility model.

[0023] Figure 2 This is a structural diagram of the filter box of this utility model;

[0024] Figure 3 This is a structural diagram of the dust filter frame of this utility model;

[0025] Figure 4 This is a structural diagram of the transmission tube of this utility model;

[0026] Figure 5 This is a structural diagram of the soot blowing mechanism of this utility model;

[0027] Figure 6 This is a structural diagram of the positioning plate of this utility model.

[0028] In the diagram, 1. Fan structure; 2. Soot blowing mechanism; 201. Connecting pipe; 202. Connecting pipe; 203. Venturi nozzle; 3. Filter box; 4. Air inlet pipe; 5. Diverter pipe; 6. First sealing ring; 7. Sealing groove; 8. Internal thread; 9. Transmission pipe; 10. Connecting pipe; 11. Dust filter rack; 12. Baffle; 13. Second sealing ring; 14. Filter plate; 15. Filter screen; 16. Mounting groove; 17. Air inlet groove; 18. Positioning plate; 19. Support assembly. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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.

[0030] Please see Figure 1-6 The present invention provides the following technical solution:

[0031] A Venturi nozzle rake soot blowing device for SCR denitrification of high dust flue gas includes a fan structure 1, a filter box 3 is provided on the right side of the fan structure 1, an air inlet pipe 4 is fixedly connected to the right side of the filter box 3, a diversion pipe 5 is provided at the bottom of the air inlet pipe 4, and a soot blowing mechanism 2 is fixedly connected to the bottom of the diversion pipe 5.

[0032] The soot blowing mechanism 2 includes a connecting pipe 201, a connecting pipe 202, and a venturi nozzle 203. The top of the connecting pipe 201 is fixedly connected to the bottom of the diverter pipe 5, the bottom of the connecting pipe 201 is fixedly connected to the top of the connecting pipe 202, and the surface of the connecting pipe 202 is threadedly connected to the inner wall of the venturi nozzle 203.

[0033] In this embodiment: By setting up a soot blowing mechanism 2, the connecting pipe 201 and the connecting pipe 202 in the soot blowing mechanism 2 are connected to the Venturi nozzle 203 by threads. This connection method facilitates disassembly and installation. When the Venturi nozzle 203 is worn or blocked, it can be quickly replaced or cleaned and maintained, improving the maintainability of the overall equipment, reducing downtime caused by equipment failure, and ensuring the continuous operating efficiency of the denitrification work. By setting up a filter box 3, the gas output from the blower structure 1 can be filtered to effectively remove impurity particles and prevent these impurities from entering the soot blowing mechanism 2. This prevents the Venturi nozzle 203 and other components from being blocked or worn by impurities, thus affecting the soot blowing effect and service life. This ensures the long-term stable and efficient operation of the soot blowing mechanism 2 and maintains the normal working environment for the high-dust flue gas SCR denitrification work.

[0034] Specifically, such as Figure 5 As shown, a first sealing ring 6 is bonded to the inner wall of the connecting pipe 202, and the surface of the first sealing ring 6 is engaged with the inner wall of the venturi nozzle 203.

[0035] Specifically, such as Figure 5 As shown, the inner wall of the Venturi nozzle 203 is provided with a sealing groove 7 that cooperates with the first sealing ring 6, and the inner wall of the Venturi nozzle 203 is provided with an internal thread 8.

[0036] Specifically, such as Figure 4 As shown, the top of the diversion pipe 5 is fixedly connected to the transmission pipe 9, and the top of the transmission pipe 9 is fixedly connected to the bottom of the air inlet pipe 4.

[0037] In this embodiment: by setting a first sealing ring 6, the first sealing ring 6 is bonded to the connecting pipe 202 during use, which facilitates the subsequent sealing work of the first sealing ring 6. The sealing groove 7 opened in the inner wall of the Venturi nozzle 203 facilitates the first sealing ring 6 to be snapped into the inner wall of the Venturi nozzle 203 through the sealing groove 7. The internal thread 8 opened in the inner wall of the Venturi nozzle 203 facilitates the subsequent installation of the Venturi nozzle 203 on the surface of the connecting pipe 202. By setting a transmission pipe 9, the transmission pipe 9 is fixedly connected to the diverter pipe 5 during use, which facilitates the subsequent transmission of gas to the inner wall of the diverter pipe 5 through the transmission pipe 9.

[0038] Specifically, such as Figure 1 As shown, a connecting pipe 10 is fixedly connected to the right side of the fan structure 1, and the right side of the connecting pipe 10 is fixedly connected to the left side of the filter box 3.

[0039] Specifically, such as Figure 2 As shown, a dust filter rack 11 is movably connected to the inner wall of the filter box 3, and a baffle 12 is bolted to the front side of the dust filter rack 11. The surface of the baffle 12 is bolted to the inner wall of the filter box 3.

[0040] In this embodiment: the fan structure 1 and the filter box 3 are fixedly connected by the connecting pipe 10 to stabilize the gas transmission path. The dust filter rack 11 is movably connected to the inner wall of the filter box 3, which facilitates the cleaning of the inner wall of the dust filter rack 11. By setting the baffle 12, the baffle 12 is fixed to the position of the filter box 3 by bolts during use, which facilitates the fixing of the position of the baffle 12 and the subsequent disassembly of the baffle 12.

[0041] Specifically, such as Figure 2 As shown, a second sealing ring 13 is bonded to the inner wall of the baffle 12, and the surface of the second sealing ring 13 is engaged with the inner wall of the filter box 3.

[0042] Specifically, such as Figure 3 As shown, a filter plate 14 is inserted into the inner wall of the dust filter rack 11, and a filter screen 15 is fixedly connected to the inner wall of the filter plate 14.

[0043] Specifically, such as Figure 3 As shown, the inner wall of the dust filter rack 11 is provided with an installation groove 16 that is used in conjunction with the filter plate 14, and the inner wall of the dust filter rack 11 is provided with an air inlet groove 17.

[0044] Specifically, such as Figure 6 As shown, a positioning plate 18 is provided on the surface of the connecting pipe 202, and a support component 19 is bolted to the bottom of the positioning plate 18.

[0045] In this embodiment: the second sealing ring 13 on the inner wall of the baffle 12 enhances the sealing between the dust filter rack 11 and the filter box 3, preventing gas leakage from the gaps and affecting the filtration effect. The filter plate 14 and filter screen 15 in the dust filter rack 11 can effectively intercept impurities in the gas. The setting of the air inlet slot 17 and the mounting slot 16 facilitates the installation of the filter plate 14 and the inflow of gas. The setting of the surface positioning plate 18 and the bottom support assembly 19 of the connecting pipe 202 can position and support the connecting pipe 202, enhance the overall structural stability of the device, and avoid the impact of gas transmission and dust blowing effect caused by the shaking of the connecting pipe 202.

[0046] Working Principle: During the operation of the blower structure 1, a soot blowing mechanism 2 is installed. The connecting pipe 201 and connecting pipe 202 in the soot blowing mechanism 2 are connected to the Venturi nozzle 203 by threads. This connection method facilitates disassembly and installation. When the Venturi nozzle 203 is worn or blocked, it can be quickly replaced or cleaned and maintained, improving the maintainability of the overall equipment, reducing downtime caused by equipment failure, and ensuring the continuous operating efficiency of the denitrification work. By installing a filter box 3, the gas output from the blower structure 1 can be filtered to effectively remove impurity particles and prevent these impurities from entering the soot blowing mechanism 2. This prevents the Venturi nozzle 203 and other components from being blocked or worn by impurities, which would affect the soot blowing effect and service life. This ensures the long-term stable and efficient operation of the soot blowing mechanism 2 and maintains the normal working environment for the high-dust flue gas SCR denitrification work.

[0047] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements 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 Venturi nozzle rake-type soot blowing device for SCR denitrification of high-dust flue gas, comprising a fan structure (1), characterized in that: A filter box (3) is provided on the right side of the fan structure (1), and an air inlet pipe (4) is fixedly connected to the right side of the filter box (3). A diversion pipe (5) is provided at the bottom of the air inlet pipe (4), and a soot blowing mechanism (2) is fixedly connected to the bottom of the diversion pipe (5). The soot blowing mechanism (2) includes a connecting pipe (201), a connecting pipe (202), and a venturi nozzle (203). The top of the connecting pipe (201) is fixedly connected to the bottom of the diverter pipe (5), the bottom of the connecting pipe (201) is fixedly connected to the top of the connecting pipe (202), and the surface of the connecting pipe (202) is threadedly connected to the inner wall of the venturi nozzle (203).

2. The Venturi nozzle rake-type soot blowing device for SCR denitrification of high-dust flue gas according to claim 1, characterized in that: The inner wall of the connecting pipe (202) is bonded with a first sealing ring (6), and the surface of the first sealing ring (6) is engaged with the inner wall of the venturi nozzle (203).

3. The Venturi nozzle rake-type soot blowing device for SCR denitrification of high-dust flue gas according to claim 2, characterized in that: The inner wall of the Venturi nozzle (203) is provided with a sealing groove (7) that is used in conjunction with the first sealing ring (6), and the inner wall of the Venturi nozzle (203) is provided with an internal thread (8).

4. The Venturi nozzle rake-type soot blowing device for SCR denitrification of high-dust flue gas according to claim 1, characterized in that: The top of the diversion pipe (5) is fixedly connected to the transmission pipe (9), and the top of the transmission pipe (9) is fixedly connected to the bottom of the air inlet pipe (4).

5. The Venturi nozzle rake-type soot blowing device for SCR denitrification of high-dust flue gas according to claim 1, characterized in that: The right side of the fan structure (1) is fixedly connected to a connecting pipe (10), and the right side of the connecting pipe (10) is fixedly connected to the left side of the filter box (3).

6. The Venturi nozzle rake-type soot blowing device for SCR denitrification of high-dust flue gas according to claim 1, characterized in that: The filter box (3) is movably connected to the inner wall of the filter box (3), and a baffle (12) is bolted to the front side of the filter box (11). The surface of the baffle (12) is bolted to the inner wall of the filter box (3).

7. The Venturi nozzle rake-type soot blowing device for SCR denitrification of high-dust flue gas according to claim 6, characterized in that: The inner wall of the baffle (12) is bonded with a second sealing ring (13), and the surface of the second sealing ring (13) is engaged with the inner wall of the filter box (3).

8. The Venturi nozzle rake-type soot blowing device for SCR denitrification of high-dust flue gas according to claim 6, characterized in that: The inner wall of the dust filter rack (11) is fitted with a filter plate (14), and the inner wall of the filter plate (14) is fixedly connected with a filter screen (15).

9. The Venturi nozzle rake-type soot blowing device for SCR denitrification of high-dust flue gas according to claim 8, characterized in that: The inner wall of the dust filter rack (11) is provided with an installation groove (16) that is used in conjunction with the filter plate (14), and the inner wall of the dust filter rack (11) is provided with an air inlet groove (17).

10. The Venturi nozzle rake-type soot blowing device for SCR denitrification of high-dust flue gas according to claim 1, characterized in that: The surface of the connecting pipe (202) is provided with a positioning plate (18), and a support component (19) is bolted to the bottom of the positioning plate (18).

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