Exhaust funnel for desulfurization and denitrification of tail gas

Abstract

The utility model discloses a tail gas desulfurization and denitration exhaust funnel, which relates to the technical field of exhaust funnels and comprises a gas inlet pipe, a particle catcher is arranged at the rear end of the gas inlet pipe, a desulfurization pipe is arranged behind the particle catcher, a denitration pipe is arranged behind the desulfurization pipe, an exhaust port is arranged at the rear end of the denitration pipe, and a gas outlet is arranged at the rear end of the denitration pipe. Connecting pipes are arranged at the rear ends of the particle catcher and the desulfurization pipe, threaded pipes are arranged at the front ends of the desulfurization pipe and the denitration pipe, fixing rings are arranged between the outer walls of the connecting pipes and the outer walls of the threaded pipes, and fixing bolts are arranged in the middles of the ends of the upper ends of the fixing rings; sealing rings are arranged between the ends of the threaded pipes and the inner wall of the connecting pipe. The tail gas desulfurization and denitrification exhaust funnel disclosed by the utility model has a better treatment effect on sulfides and nitrides in tail gas, the exhaust funnel is simple to disassemble and assemble, and fillers in the exhaust funnel are also very convenient to replace.

Description

Technical Field

[0001] This utility model relates to the field of exhaust stack technology, and in particular to an exhaust stack for desulfurization and denitrification of tail gas. Background Technology

[0002] Locomotives are common vehicles used in daily life. When locomotives burn gasoline or diesel, they emit polluting exhaust gases. In order to reduce the amount of exhaust gas emitted by locomotives, exhaust gas treatment is necessary to reduce air pollution.

[0003] Existing locomotive exhaust stacks do not completely treat the sulfides and nitrates in the exhaust gas, resulting in low treatment efficiency. Furthermore, replacing the filling material inside the exhaust stack is quite troublesome, which has a certain adverse effect on the locomotive exhaust gas treatment process. In order to overcome the shortcomings of the existing technology, we propose an exhaust gas desulfurization and denitrification stack. Utility Model Content

[0004] The main purpose of this utility model is to provide a tail gas desulfurization and denitrification exhaust stack, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A tail gas desulfurization and denitrification exhaust stack includes an inlet pipe, a particulate filter at the rear end of the inlet pipe, a desulfurization pipe at the rear end of the particulate filter, a denitrification pipe at the rear end of the desulfurization pipe, an exhaust port at the rear end of the denitrification pipe, a connecting pipe at the rear end of both the particulate filter and the desulfurization pipe, a threaded pipe at the front end of both the desulfurization pipe and the denitrification pipe, a fixing ring between the outer wall of the connecting pipe and the threaded pipe, a fixing bolt at the middle of the upper end of each fixing ring, and a sealing ring between the end of the threaded pipe and the inner wall of the connecting pipe.

[0007] Preferably, the particle trap is internally provided with honeycomb ceramic, the desulfurization pipe is internally provided with activated alumina, the denitrification pipe is internally provided with a metal mesh, the upper end of the denitrification pipe is provided with an inlet, and the upper end of the inlet is provided with a sealing cap.

[0008] Preferably, a threaded interface is provided between the inner wall of the threaded pipe and the connecting pipe, and the threaded pipe is threadedly connected to the inner wall of the connecting pipe through the provided threaded interface.

[0009] Preferably, the sealing ring is made of rubber, and a threaded hole is provided between the fixing bolt and the end of the fixing ring. The fixing bolt is threadedly connected to the end of the fixing ring through the threaded hole.

[0010] Preferably, the surface of the honeycomb ceramic is coated with a platinum metal catalyst.

[0011] Preferably, the metal mesh contains a vanadium-based catalyst in its center.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. In this utility model, the honeycomb ceramic can adsorb solid particulate matter contained in the exhaust gas, and the surface of the honeycomb ceramic is coated with a platinum metal catalyst. When the exhaust gas passes through, it will undergo an oxidation reaction with the catalyst to perform preliminary treatment on the exhaust gas. The activated alumina can adsorb sulfur oxides in the exhaust gas to achieve desulfurization. The middle surface of the metal mesh can be attached with liquid ammonia and, together with the vanadium-based catalyst, treat the nitrates in the exhaust gas, making the exhaust gas treatment effect better.

[0014] 2. In this utility model, the threaded pipe, fixing ring, and connecting pipe make it easy for people to disassemble the exhaust stack and replace the filling material inside the particulate filter, desulfurization pipe, and denitrification pipe, thus maintaining the efficiency of exhaust gas treatment. The sealing ring can maintain the sealing effect between the threaded pipe and the connecting pipe, preventing exhaust gas leakage. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram showing the disassembled connection structure of the connecting pipe of this utility model;

[0017] Figure 3 This is a schematic diagram of the internal structure of the particle trap of this utility model;

[0018] Figure 4 This is a schematic diagram of the internal structure of the desulfurization pipe of this utility model;

[0019] Figure 5 This is a schematic diagram of the internal structure of the pin-removing tube of this utility model.

[0020] In the diagram: 1. Inlet pipe; 2. Particulate trap; 3. Connecting pipe; 4. Fixing ring; 5. Desulfurization pipe; 6. Denitrification pipe; 7. Exhaust port; 8. Threaded pipe; 9. Sealing ring; 10. Fixing bolt; 11. Honeycomb ceramic; 12. Activated alumina; 13. Metal mesh; 14. Addition port; 15. Sealing cap. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0022] like Figures 1-5As shown, the intake pipe 1 is connected to the exhaust outlet, and the exhaust gas enters the exhaust stack through the intake pipe 1. A particulate filter 2 is installed at the rear end of the intake pipe 1 to absorb solid particulate matter in the exhaust gas. A desulfurization pipe 5 is installed after the particulate filter 2 to treat sulfur oxides in the exhaust gas. A denitrification pipe 6 is installed after the desulfurization pipe 5 to treat nitrates in the exhaust gas. An exhaust port 7 is installed at the rear end of the denitrification pipe 6, and the treated exhaust gas is discharged from the exhaust port 7. Connecting pipes 3 are installed at the rear ends of both the particulate filter 2 and the desulfurization pipe 5. Threaded pipes 8 are installed at the front ends of both the desulfurization pipe 5 and the denitrification pipe 6. A threaded interface is provided between the threaded pipe 8 and the inner wall of the connecting pipe 3. The threaded pipe 8 is connected to the connecting pipe 3 via a threaded joint. The threaded interface is threadedly connected to the connecting pipe 3. The particulate trap 2, desulfurization pipe 5, and denitrification pipe 6 are connected through the connecting pipe 3 and the threaded pipe 8. A fixing ring 4 is provided between the outer wall of the connecting pipe 3 and the threaded pipe 8. The fixing ring 4 is used to further fix the threaded pipe 8 and the connecting pipe 3. A fixing bolt 10 is provided in the middle of the upper end of the fixing ring 4. A threaded hole is provided between the fixing bolt 10 and the end of the fixing ring 4. The fixing bolt 10 is threadedly connected to the end of the fixing ring 4 through the threaded hole. Rotating the fixing bolt 10 can tighten or loosen the fixing ring 4. A sealing ring 9 is provided between the end of the threaded pipe 8 and the inner wall of the connecting pipe 3. The sealing ring 9 is made of rubber and is used to maintain the sealing of the connection between the threaded pipe 8 and the connecting pipe 3.

[0023] like Figures 1-5 As shown, the particulate trap 2 has a honeycomb ceramic 11 inside, and the surface of the honeycomb ceramic 11 is coated with a platinum metal catalyst to oxidize solid particulate matter in the exhaust gas. The desulfurization pipe 5 has an activated alumina 12 inside, which is used to absorb sulfur oxides in the exhaust gas. The denitrification pipe 6 has a metal mesh 13 inside, and liquid ammonia can be attached to the surface of the metal mesh 13 to treat nitrates in the exhaust gas. The upper end of the denitrification pipe 6 has an inlet 14, which is used to add exhaust gas into the metal mesh 13. The upper end of the inlet 14 has a sealing cap 15, which is used to keep the inlet 14 sealed.

[0024] It should be noted that this utility model is a tail gas desulfurization and denitrification exhaust stack. In use, the inlet pipe 1 is connected to the tail gas outlet. The tail gas enters the interior of the particulate filter 2 from the inlet pipe 1. The solid particulate matter in the tail gas is absorbed by the honeycomb ceramic 11 inside the particulate filter 2. Then, it enters the interior of the desulfurization pipe 5 through the connecting pipe 3. The sulfur oxides in the tail gas are absorbed by the activated alumina 12 inside the desulfurization pipe 5. Then, it enters the interior of the denitrification pipe 6. The nitrates in the tail gas react with the liquid ammonia inside the denitrification pipe 6. After being treated, they are discharged from the exhaust port 7. Remove the fixing bolt 10 at the upper end of the fixing ring 4, then remove the fixing ring 4 from the outer wall of the connecting pipe 3. Then, unscrew the threaded pipe 8 from the interior of the connecting pipe 3. The desulfurization pipe 5, the particulate filter 2, and the denitrification pipe 6 can be disassembled, the internal filling material can be replaced, and the sealing cover 15 can be opened. Liquid ammonia can be added to the interior of the denitrification pipe 6 through the addition port 14.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A tail gas desulfurization and denitrification exhaust stack, comprising an intake pipe (1), characterized in that: A particulate trap (2) is provided at the rear end of the air inlet pipe (1), a desulfurization pipe (5) is provided behind the particulate trap (2), a desulphurization pipe (6) is provided behind the desulfurization pipe (5), an exhaust port (7) is provided at the rear end of the desulphurization pipe (6), a connecting pipe (3) is provided at the rear end of both the particulate trap (2) and the desulfurization pipe (5), a threaded pipe (8) is provided at the front end of both the desulfurization pipe (5) and the desulphurization pipe (6), a fixing ring (4) is provided between the outer wall of the connecting pipe (3) and the threaded pipe (8), a fixing bolt (10) is provided at the middle of the upper end of the fixing ring (4), and a sealing ring (9) is provided between the end of the threaded pipe (8) and the inner wall of the connecting pipe (3).

2. The exhaust stack for desulfurization and denitrification of tail gas according to claim 1, characterized in that: The particle trap (2) is equipped with a honeycomb ceramic (11) inside, the desulfurization pipe (5) is equipped with activated alumina (12) inside, the denitrification pipe (6) is equipped with a metal mesh (13) inside, the denitrification pipe (6) is equipped with an addition port (14) at the upper end, and the addition port (14) is equipped with a sealing cap (15) at the upper end.

3. The exhaust stack for desulfurization and denitrification of tail gas according to claim 1, characterized in that: A threaded interface is provided between the inner wall of the threaded pipe (8) and the connecting pipe (3), and the threaded pipe (8) is threadedly connected to the inner wall of the connecting pipe (3) through the provided threaded interface.

4. The exhaust stack for desulfurization and denitrification of tail gas according to claim 1, characterized in that: The sealing ring (9) is made of rubber. A threaded hole is provided between the end of the fixing bolt (10) and the fixing ring (4). The fixing bolt (10) is threadedly connected to the end of the fixing ring (4) through the threaded hole.

5. The exhaust stack for desulfurization and denitrification of tail gas according to claim 2, characterized in that: The surface of the honeycomb ceramic (11) is coated with a platinum metal catalyst.

6. The exhaust stack for desulfurization and denitrification of tail gas according to claim 2, characterized in that: The metal mesh (13) contains a vanadium-based catalyst in the middle.

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