A pyrolysis oil tail gas desulfurization and denitrification device convenient to clean

Abstract

The utility model discloses a kind of pyrolysis oil tail gas desulfurization and denitrification devices convenient to clean, belong to desulfurization and denitrification device cleaning technical field, its technical scheme main points include reaction tower body, the top of the inside of reaction tower body is welded with connecting mechanism, the surface welding of reaction tower body has spraying mechanism, connecting mechanism adopts the thread cooperation of connecting screw and the thread hole in the inside of positioning pipe, only need to loosen connecting screw to quickly take down tower cover from the top of reaction tower body, since tower cover is fixedly connected with spray plate by drain pipe, when tower cover is disassembled, spray plate and bottom nozzle can be directly driven to move out of tower body synchronously, so that the inside and outside of spray plate, nozzle and drain pipe can be completely exposed, it is convenient for staff to clean comprehensively, positioning pipe is welded on the top of fixed plate, it provides clear assembly positioning reference for connecting screw, avoid tower cover to appear deviation when installing, also through the depth thread cooperation of screw and thread hole.

Description

Technical Field

[0001] This utility model relates to the field of cleaning technology for desulfurization and denitrification devices, and in particular to a desulfurization and denitrification device for pyrolysis oil tail gas that is easy to clean. Background Technology

[0002] The desulfurization and denitrification unit for pyrolysis oil tail gas is an environmental protection device used to treat the tail gas generated during the pyrolysis oil production process. Its core function is to remove sulfides and nitrogen oxides from the tail gas and reduce pollutant emissions.

[0003] To address the aforementioned issues, existing patents have provided solutions. However, most existing reaction tower spray mechanisms are fixed structures, lacking structures that facilitate disassembly and cleaning. This results in slurry buildup on the inner wall of the spray pipes and crystallization blockage in the atomizing nozzles, which are difficult to remove through conventional rinsing. Workers must insert tools through narrow inspection ports to operate the spray mechanism, thereby reducing the maintenance efficiency of the spray mechanism.

[0004] Therefore, a desulfurization and denitrification device for pyrolysis oil tail gas that is easy to clean is proposed. Utility Model Content

[0005] The purpose of this utility model is to provide a desulfurization and denitrification device for cracked oil tail gas that is easy to clean. It can solve the problem that most of the spray mechanisms of existing desulfurization and denitrification devices are fixed structures and lack structures that are easy to disassemble and clean. This makes it difficult to remove slurry scale on the inner wall of the spray pipe and crystal blockage of the atomizing nozzles through conventional rinsing. Workers have to reach into the narrow inspection port to operate the device, which reduces the maintenance efficiency of the spray mechanism.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a desulfurization and denitrification device for easily cleaned pyrolysis oil tail gas, comprising a reaction tower body, a connecting mechanism welded to the top of the inner side of the reaction tower body, a spraying mechanism welded to the surface of the reaction tower body, the connecting mechanism comprising a fixing plate, several positioning tubes, connecting screw holes, a tower cover and a connecting screw, the fixing plate being welded to the top of the inner side of the reaction tower body, the positioning tubes being welded to the top of the fixing plate, the connecting screw holes being opened at the top of the inner side of the positioning tubes, the tower cover being snapped onto the top of the reaction tower body, the connecting screw being movably connected to the inner side of the tower cover, and the bottom of the connecting screw penetrating the tower cover and threadedly connected to the inner side of the connecting screw hole.

[0007] Preferably, the spraying mechanism includes a support plate, a pressurizing pump, a connecting hose, a drain pipe, a spray plate, several nozzles, and connecting pipes, with the support plate welded to the top of the surface of the reaction tower body.

[0008] Preferably, the pressurizing pump is welded to the right side of the top of the support plate, the connecting hose is fixedly connected to the left side of the pressurizing pump, the drain pipe is fixedly connected to the top of the tower cover, and the bottom of the drain pipe penetrates the tower cover and is fixedly connected to the top of the spray plate.

[0009] Preferably, the spray plate is slidably connected to the inner side of the reaction tower body, the spray plate slides and extends to the bottom of the fixed plate, the left side of the connecting hose is fixedly connected to the top of the drain pipe, the nozzle is installed at the bottom of the spray plate, and the connecting pipe is fixedly connected to the right side of the pressure pump.

[0010] Preferably, a sealing ring is welded to the side of the drain pipe near the spray plate, and the surface of the sealing ring is coated with an anti-corrosion coating.

[0011] Preferably, a reinforcing base is welded to the bottom of the pressurizing pump, and the surface of the reinforcing base is coated with an anti-corrosion coating.

[0012] Preferably, support columns are welded to both sides of the bottom of the support plate, and the bottom of the support columns is engraved with anti-slip texture.

[0013] Preferably, a connecting flange is fixedly connected to the top of the drain pipe and the bottom of the left side of the connecting hose, and the surface of the connecting flange is coated with an anti-corrosion coating.

[0014] Compared with the prior art, the beneficial effects of this utility model are: 1. The connection mechanism of this application adopts the threaded engagement of the connecting screw and the inner threaded hole of the positioning tube. The tower cover can be quickly removed from the top of the reaction tower body simply by loosening the connecting screw. Since the tower cover and the spray plate are fixedly connected by the drain pipe, the spray plate and the bottom nozzle can be moved out of the tower body simultaneously when the tower cover is disassembled, so that the inner and outer sides of the spray plate, nozzle and drain pipe can be fully exposed, which is convenient for the staff to carry out a thorough cleaning. The positioning tube is welded to the top of the fixed plate, which not only provides a clear assembly positioning benchmark for the connecting screw and avoids the tower cover from being offset during installation, but also ensures the tightness of the connection between the tower cover and the reaction tower body through the deep thread engagement of the screw and the threaded hole, improves the sealing performance during the operation of the device, prevents the exhaust gas from leaking out from the top cover gap, and ensures the desulfurization and denitrification reaction efficiency. 2. In this application, the pressurized pump in the spray mechanism delivers desulfurization slurry to the drain pipe via a connecting hose. Under high pressure, the slurry is atomized through the nozzles and sprayed evenly, significantly increasing the contact area with the exhaust gas and improving the sulfide absorption efficiency. At the same time, the spray plate, nozzles, and drain pipe form an integrated module. After the tower cover is disassembled, the scale on the inner and outer sides of the spray plate and the inner wall of the drain pipe can be directly wiped or high-pressure washed. The spray plate is slidably connected to the inside of the reaction tower body and extends to the bottom of the fixed plate, which not only ensures the structural stability during spraying but also provides a guiding function for disassembly and assembly, avoiding jamming and wear when the tower cover moves the spray components in and out. In addition, the flexible design of the connecting hose replaces the traditional rigid pipe connection, so that the fixed pipeline does not need to be disassembled when the tower cover is disassembled, reducing the sealing loss of the pipe interface and reducing the risk of component damage during maintenance. Attached Figure Description

[0015] Figure 1 This is an overall structural diagram of the easy-to-clean desulfurization and denitrification device for pyrolysis oil tail gas of this utility model. Figure 2 This is a schematic diagram of the structure of the tower cover of this utility model; Figure 3 This utility model Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the structure of the pressure pump of this utility model; Figure 5 This is a schematic diagram of the nozzle structure of this utility model.

[0016] In the diagram, 1. Reactor tower body; 2. Connecting mechanism; 21. Fixing plate; 22. Positioning pipe; 23. Connecting screw hole; 24. Tower cover; 25. Connecting screw; 3. Spraying mechanism; 31. Support plate; 32. Pressure pump; 33. Connecting hose; 34. Drain pipe; 35. Spray plate; 36. Nozzle; 37. Connecting pipe; 4. Sealing ring; 5. Reinforcing seat; 6. Support column; 7. Connecting flange. Detailed Implementation

[0017] 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.

[0018] Please see Figure 1-5 The present invention provides the following technical solution: A desulfurization and denitrification device for easily cleaned pyrolysis oil tail gas includes a reaction tower body 1. A connecting mechanism 2 is welded to the top of the inner side of the reaction tower body 1, and a spraying mechanism 3 is welded to the surface of the reaction tower body 1. The connecting mechanism 2 includes a fixing plate 21, several positioning tubes 22, connecting screw holes 23, a tower cover 24, and a connecting screw 25. The fixing plate 21 is welded to the top of the inner side of the reaction tower body 1, the positioning tubes 22 are welded to the top of the fixing plate 21, the connecting screw holes 23 are opened in the top of the inner side of the positioning tubes 22, the tower cover 24 is snapped into the top of the reaction tower body 1, and the connecting screw 25 is movably connected to the inner side of the tower cover 24. The bottom of the connecting screw 25 penetrates the tower cover 24 and is threaded to the inner side of the connecting screw hole 23.

[0019] In this embodiment: the inner space of the reaction tower body 1 creates a suitable environment for the full reaction of the pyrolysis oil tail gas and the desulfurization slurry. Simultaneously, it supports and limits the connection mechanism 2 and the spray mechanism 3. An exhaust pipe is fixedly connected to the top rear side of the reaction tower body 1, a drain pipe is fixedly connected to the bottom bottom of the reaction tower body 1, and an air inlet pipe is fixedly connected to the bottom front side of the reaction tower body 1. The fixing plate 21 is firmly connected to the top inner side of the reaction tower body 1 by welding, forming a stable load-bearing support platform. Simultaneously, it allows for the positioning of the pipe... The positioning tube 22 provides support and limits the connection screw hole 23 and the connecting screw rod 25. The connecting screw hole 23 and the connecting screw rod 25 form a threaded engagement. The tower cover 24 is fixedly connected to the drain pipe 34. When disassembling, the spray plate 35 and the nozzle 36 can be moved out of the tower body simultaneously. The connecting screw rod 25 serves as the connection hub between the tower cover 24 and the tower body. The tower cover 24 is firmly fixed by tightening to ensure sealing. At the same time, the fixing can be quickly released by loosening, providing a convenient path for the disassembly of the tower cover 24 and the spray mechanism 3.

[0020] Specifically, such as Figure 4 , Figure 5 As shown, the spraying mechanism 3 includes a support plate 31, a pressurizing pump 32, a connecting hose 33, a drain pipe 34, a spray plate 35, several nozzles 36 and a connecting pipe 37. The support plate 31 is welded to the top of the surface of the reaction tower body 1.

[0021] Specifically, such as Figure 4 , Figure 5 As shown, the pressure pump 32 is welded to the right side of the top of the support plate 31, the connecting hose 33 is fixedly connected to the left side of the pressure pump 32, the drain pipe 34 is fixedly connected to the top of the tower cover 24, and the bottom of the drain pipe 34 passes through the tower cover 24 and is fixedly connected to the top of the spray plate 35.

[0022] Specifically, such as Figure 4 , Figure 5As shown, the spray plate 35 is slidably connected to the inner side of the reaction tower body 1. The spray plate 35 slides and extends to the bottom of the fixed plate 21. The left side of the connecting hose 33 is fixedly connected to the top of the drain pipe 34. The nozzle 36 is installed at the bottom of the spray plate 35. The connecting pipe 37 is fixedly connected to the right side of the pressure pump 32.

[0023] In this embodiment: the support plate 31 provides a stable installation platform for the booster pump 32, which provides sufficient pressure for the delivery and atomization of the desulfurization slurry. The connecting hose 33 is fixedly connected to the drain pipe 34 on its left side via the connecting flange 7, and connected to the booster pump 32 on its right side, ensuring the sealing and smooth flow of the slurry. Compared with traditional rigid pipes, the flexibility of the hose allows the tower cover 24 to lift and disassemble the drain pipe 34 without disassembling the pipeline, avoiding the problem of interface seal failure caused by frequent disassembly. The top of the drain pipe 34 is connected to the connecting hose 33, and the bottom passes through it. The tower cover 24 is fixed to the spray plate 35, forming a complete slurry delivery path from the pressurizing pump 32 to the nozzles 36, ensuring that the slurry is evenly distributed to the spray plate 35. The spray plate 35 can be moved out of the tower body synchronously with the tower cover 24, and the staff can directly clean its surface and inner flow channels to thoroughly remove the scale. At the same time, the slurry can be evenly distributed to each nozzle 36. The nozzles 36 make the slurry form fine atomized droplets after being subjected to high pressure, which fully contact the rising cracked oil tail gas to ensure efficient absorption of sulfides. The connecting pipe 37 can quickly introduce desulfurization media such as limestone slurry to ensure the continuous operation of the spraying mechanism 3.

[0024] Specifically, such as Figure 5 As shown, a sealing ring 4 is welded to the side of the drain pipe 34 near the spray plate 35, and the surface of the sealing ring 4 is coated with anti-corrosion paint.

[0025] Specifically, such as Figure 2 As shown, a reinforcing base 5 is welded to the bottom of the pressure pump 32, and the surface of the reinforcing base 5 is coated with an anti-corrosion coating.

[0026] In this embodiment: by setting a sealing ring 4, leakage of high-pressure slurry from the interface during transportation is prevented, thus avoiding slurry waste and corrosion of the internal structure of the tower. By setting an anti-corrosion coating, it can withstand the acidic corrosive environment of the desulfurization slurry, extending the service life of the sealing ring 4. By setting a reinforcing seat 5, the weight of the pressure pump 32 and the vibration load during operation are evenly transferred to the support plate 31, avoiding deformation of the support plate 31 or cracking of the weld points caused by excessive local pressure. By setting an anti-corrosion coating, it can adapt to the humid and corrosive environment around the reaction tower, avoiding rust damage.

[0027] Specifically, such as Figure 2 As shown, support columns 6 are welded to both sides of the bottom of the support plate 31, and anti-slip textures are engraved on the bottom of the support columns 6.

[0028] Specifically, such as Figure 4 As shown, the top of the drain pipe 34 and the bottom left side of the connecting hose 33 are both fixedly connected to the connecting flange 7, and the surface of the connecting flange 7 is coated with anti-corrosion paint.

[0029] In this embodiment: by setting the support column 6, the weight of the pressure pump 32 on the support plate 31 can be shared, preventing the support plate 31 from bending and deforming due to long-term stress. By setting the anti-slip texture, the friction with the ground is increased, preventing the support column 6 from shifting due to vibration during device operation. By setting the connecting flange 7 and fastening it with flange bolts, the connection between the drain pipe 34 and the connecting hose 33 can be ensured to prevent high-pressure slurry leakage. By setting the anti-corrosion coating, the corrosion of slurry and exhaust gas can be effectively resisted, avoiding sealing failure caused by flange corrosion and extending the service life of the pipeline connection.

[0030] Working principle: First, the operator attaches the tower cover 24 to the top of the reaction tower body 1, initially aligning the tower cover 24 with the tower body. Then, the operator tightens the connecting screw 25 inside the tower cover 24, ensuring that the bottom of the connecting screw 25 passes through the tower cover 24 and forms a tight threaded fit with the connecting screw hole 23 inside the positioning tube 22. Simultaneously, the spray plate 35 is installed in place along with the tower cover 24, sliding against the inside of the reaction tower body 1 and extending to the bottom of the fixing plate 21. Next, the operator starts the pressurization pump 32, and the externally stored limestone desulfurization slurry flows through the connecting pipe on the right side of the pressurization pump 32. 37 is rapidly introduced, forming a slurry flow with a certain pressure. Then, the pressurized desulfurization slurry is transported to the drain pipe 34 through the connecting hose 33. The slurry flows downward through the drain pipe 34 and is eventually evenly distributed into the internal channels of the spray plate 35. It is then sprayed out at high speed through several nozzles 36 at the bottom of the spray plate 35, forming fine and evenly distributed atomized droplets. These droplets form a counter-current contact with the pyrolysis oil tail gas entering from the lower part of the reaction tower body 1. Subsequently, the atomized slurry and the pyrolysis oil tail gas undergo a highly efficient reaction, achieving the purification and removal of sulfides and ensuring that the tail gas meets emission standards. The atomized droplets sprayed from 36 greatly increase the contact area with the exhaust gas. The limestone component in the slurry reacts fully with the sulfur oxides in the exhaust gas, converting harmful sulfides into solid products that fall back to the bottom of the reaction tower body 1 with the slurry and are discharged through the drain pipe of the reaction tower body 1. The clean exhaust gas, after desulfurization treatment, flows upward, passes through the spray area, and is discharged from the exhaust pipe at the top rear side of the reaction tower body 1. Finally, when the unit needs cleaning and maintenance after operating for a period of time, the operator loosens the connecting screw 25 inside the tower cover 24 to release it from the screw on the positioning pipe 22. With the connection made, the tower cover 24 is removed from the top of the reaction tower body 1. At this time, the drain pipe 34, spray plate 35 and nozzle 36, which are fixedly connected to the tower cover 24, are simultaneously brought out of the tower body and fully exposed to the operating space. The staff can directly clean the scale on the surface of the spray plate 35 and the flow channel and the inside of the nozzle 36 holes. The connecting hose 33 is flexible and adaptable to the cleaning operation, without the need to disassemble the pipeline. After cleaning, the staff can reset the tower cover 24 and the spray mechanism 3, tighten the connecting screw 25 and put it back into use, improving maintenance efficiency and ensuring the long-term stable operation of the device.

[0031] 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 desulfurization and denitrification device for easily cleaned pyrolysis oil tail gas, comprising a reaction tower body (1), characterized in that: A connecting mechanism (2) is welded to the top of the inner side of the reaction tower body (1), and a spraying mechanism (3) is welded to the surface of the reaction tower body (1). The connecting mechanism (2) includes a fixing plate (21), several positioning tubes (22), connecting screw holes (23), a tower cover (24), and a connecting screw (25). The fixing plate (21) is welded to the top of the inner side of the reaction tower body (1), the positioning tubes (22) are welded to the top of the fixing plate (21), the connecting screw holes (23) are opened at the top of the inner side of the positioning tubes (22), the tower cover (24) is snapped onto the top of the reaction tower body (1), the connecting screw (25) is movably connected to the inner side of the tower cover (24), and the bottom of the connecting screw (25) penetrates the tower cover (24) and is threaded to the inner side of the connecting screw hole (23).

2. The easy-to-clean desulfurization and denitrification device for pyrolysis oil tail gas according to claim 1, characterized in that: The spraying mechanism (3) includes a support plate (31), a pressurizing pump (32), a connecting hose (33), a drain pipe (34), a spray plate (35), several nozzles (36) and a connecting pipe (37). The support plate (31) is welded to the top of the surface of the reaction tower body (1).

3. The easy-to-clean desulfurization and denitrification device for pyrolysis oil tail gas according to claim 2, characterized in that: The pressurizing pump (32) is welded to the right side of the top of the support plate (31), the connecting hose (33) is fixedly connected to the left side of the pressurizing pump (32), the drain pipe (34) is fixedly connected to the top of the tower cover (24), and the bottom of the drain pipe (34) passes through the tower cover (24) and is fixedly connected to the top of the spray plate (35).

4. The easy-to-clean desulfurization and denitrification device for pyrolysis oil tail gas according to claim 2, characterized in that: The spray plate (35) is slidably connected to the inside of the reaction tower body (1). The spray plate (35) slides and extends to the bottom of the fixed plate (21). The left side of the connecting hose (33) is fixedly connected to the top of the drain pipe (34). The nozzle (36) is installed at the bottom of the spray plate (35). The connecting pipe (37) is fixedly connected to the right side of the pressure pump (32).

5. The easy-to-clean desulfurization and denitrification device for pyrolysis oil tail gas according to claim 2, characterized in that: A sealing ring (4) is welded to the side of the drain pipe (34) near the spray plate (35), and the surface of the sealing ring (4) is coated with an anti-corrosion coating.

6. The easy-to-clean desulfurization and denitrification device for pyrolysis oil tail gas according to claim 2, characterized in that: The bottom of the pressure pump (32) is welded with a reinforcing base (5), and the surface of the reinforcing base (5) is coated with an anti-corrosion coating.

7. The easy-to-clean desulfurization and denitrification device for pyrolysis oil tail gas according to claim 2, characterized in that: The bottom sides of the support plate (31) are welded with support columns (6), and the bottom of the support columns (6) is engraved with anti-slip texture.

8. The easy-to-clean desulfurization and denitrification device for pyrolysis oil tail gas according to claim 2, characterized in that: The top of the drain pipe (34) and the bottom left side of the connecting hose (33) are both fixedly connected to a connecting flange (7), and the surface of the connecting flange (7) is coated with an anti-corrosion coating.

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