Ozone oxidation combined with hydrogen peroxide treatment ship exhaust gas denitration device

Abstract

The present application relates to a kind of ship exhaust gas denitration device of ozone oxidation combined with hydrogen peroxide treatment, including reaction cavity, the bottom side wall of reaction cavity is provided with flue gas inlet, bottom is provided with drain, inside is sequentially provided with ozone jet pipe, hydrogen peroxide spraying pipe and mixing pipeline from bottom to top, top is provided with flue gas outlet;Hydrogen peroxide spraying pipe below is provided with branch pipe, branch pipe is connected with spray head.Spray head is cooperated with branch pipe by main pipe, protruding block, locking piece, slider and gland, reliable fixing and quick disassembly are realized.The device can improve the contact reaction effect of tail gas, ozone and hydrogen peroxide, and facilitate spray head maintenance.

Description

Technical Field

[0001] This invention belongs to the technical field of denitrification devices, specifically a denitrification device for ship exhaust gas treated with ozone oxidation and hydrogen peroxide. Background Technology

[0002] Marine diesel engines emit exhaust gases containing nitrogen oxides during operation. If these gases are emitted directly without effective treatment, they can easily pollute the atmosphere. With increasingly stringent emission control requirements for ships, exhaust gas denitrification devices are widely used in marine exhaust systems to reduce the nitrogen oxide content in exhaust gases.

[0003] Existing methods for denitrification of ship exhaust typically include selective catalytic reduction, wet absorption, or oxidative absorption. Among these, simple wet absorption has limited effectiveness in removing sparingly soluble nitrogen oxides such as nitric oxide. It usually requires first oxidizing the lower-valence nitrogen oxides to higher-valence nitrogen oxides, which are more easily absorbed, before absorption by the absorbent. Ozone has strong oxidizing power and can be used to oxidize nitrogen oxides in exhaust gas; hydrogen peroxide also has oxidizing and absorption-aiding effects, further promoting the conversion and removal of nitrogen oxides.

[0004] However, existing ozone oxidation or hydrogen peroxide spraying treatment devices still have certain shortcomings in shipboard applications. On the one hand, the residence time of exhaust gas in the reaction chamber is limited. If the ozone or hydrogen peroxide does not come into sufficient contact with the exhaust gas, the oxidation and absorption reactions are incomplete, affecting the denitrification efficiency. On the other hand, the spray heads are exposed to a humid flue gas environment containing corrosive media and particulate matter for a long time, making them prone to clogging, scaling, or corrosion. If the spray heads use ordinary threaded connections or complex fastening structures, maintenance and disassembly are inconvenient. After long-term use, the accumulation of dirt may cause the connection parts to become stuck, increasing the difficulty of maintenance.

[0005] Therefore, it is necessary to provide an ozone oxidation combined with hydrogen peroxide treatment denitrification device for ship exhaust gas that can improve the contact reaction effect of ozone, hydrogen peroxide and ship exhaust gas, and facilitate the disassembly and maintenance of the spray head. Summary of the Invention

[0006] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an ozone oxidation combined with hydrogen peroxide treatment device for denitrification of ship exhaust gas, comprising, The reaction chamber has a flue gas inlet on the bottom side wall and a drain outlet at the bottom. Inside the reaction chamber, from bottom to top, there are an ozone jet pipe, a hydrogen peroxide spray pipe, and a mixing pipe. The top of the reaction chamber has a flue gas outlet. A branch pipe is installed below the hydrogen peroxide spray pipe, and a spray head is connected to the branch pipe.

[0008] As a preferred technical solution for a ship exhaust gas denitrification device that combines ozone oxidation with hydrogen peroxide treatment, an inner tube is provided inside the branch pipe, a groove is left between the inner tube and the branch pipe, and an annular groove is provided on the outer surface of the inner tube, with a sealing ring embedded in the annular groove.

[0009] As a preferred technical solution for a ship exhaust gas denitrification device that combines ozone oxidation with hydrogen peroxide treatment, the branch pipe is provided with a venting passage connecting the inter-slot to the outside of the branch pipe, and the external vent of the venting passage is lower than the internal vent.

[0010] As a preferred technical solution for a ship exhaust gas denitrification device combining ozone oxidation and hydrogen peroxide treatment, an annular conical groove is provided on the outer side of the branch pipe, a helical groove is provided on the inner wall of the branch pipe, and an inner annular groove is provided on the inner side of the end of the branch pipe, with the end of the helical groove communicating with the inner annular groove.

[0011] As a preferred technical solution for a ship exhaust gas denitrification device that combines ozone oxidation with hydrogen peroxide treatment, the spray head includes a main pipe, a protrusion is provided on the outer side of the top of the main pipe, the protrusion is embedded in the spiral groove, and a limiting ring plate is also provided on the outer side of the main pipe; The main body is embedded in the slot.

[0012] As a preferred technical solution for a ship exhaust gas denitrification device that combines ozone oxidation with hydrogen peroxide treatment, a locking component is provided on the outside of the spray head. The locking component includes a sleeve and a double clamping plate disposed on the inside of the sleeve, and the limiting ring plate is embedded in the double clamping plate.

[0013] As a preferred technical solution for a ship exhaust gas denitrification device combining ozone oxidation and hydrogen peroxide treatment, the locking component is sleeved on the outside of the branch pipe, the top outer side of the sleeve is provided with an outer ring groove, the sleeve is also provided with a square hole, and the outside of the square hole is also provided with a square groove.

[0014] As a preferred technical solution for a ship exhaust gas denitrification device combining ozone oxidation and hydrogen peroxide treatment, a slider is provided in the square hole. The slider includes a guide block and a limiting end plate. One end of the guide block is provided with an inclined surface, and the end of the guide block is embedded in the annular conical groove.

[0015] As a preferred technical solution for a ship exhaust gas denitrification device that combines ozone oxidation with hydrogen peroxide treatment, a pressure cap is provided above the sleeve. The pressure cap includes a side plate and a pressure plate disposed on the side plate, and the side plate is embedded in the outer annular groove.

[0016] As a preferred technical solution for a ship exhaust gas denitrification device that combines ozone oxidation with hydrogen peroxide treatment, a vertical groove is provided on the inner wall of the side plate, and a limiting block is also provided on the sleeve, with the limiting block embedded in the vertical groove.

[0017] The beneficial effects of this invention are as follows: By sequentially arranging an ozone jet pipe, a hydrogen peroxide spray pipe, and a mixing pipe within the reaction chamber, the ship's exhaust gas undergoes ozone oxidation, hydrogen peroxide spray absorption, and mixing reaction in sequence as it flows from bottom to top, thereby improving the removal efficiency of nitrogen oxides. Simultaneously, the spray head and branch pipe are secured by a combination of protrusions, spiral grooves, locking components, sliders, and pressure caps, ensuring reliable connection, easy disassembly, and convenient cleaning and maintenance, thus reducing the difficulty of repair after the spray head becomes clogged or scaled. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein: Figure 1 This is a schematic diagram of the overall cross-sectional structure of the present invention; Figure 2 This is a schematic diagram of the branch pipe structure in this invention; Figure 3 This is a schematic diagram of the connection structure between the spray head and the branch pipe in this invention; Figure 4 This is a schematic diagram of the structure of the spray head in this invention; Figure 5 This is a schematic diagram of the structure of the locking support in this invention; Figure 6 This is a schematic diagram of the pressure cap structure in this invention; Figure 7 This is a schematic diagram of the slider structure in this invention; Figure 8 This is a schematic diagram of the hydrogen peroxide spray pipe laying structure in the reaction chamber in this invention.

[0019] Reference numerals: 101, flue gas inlet; 102, drain outlet; 103, ozone jet pipe; 105, mixing pipe; 100, reaction chamber; 106, flue gas outlet; 104, hydrogen peroxide spray pipe; 107a, inner pipe; 107c, sealing ring; 107d, venting passage; 107e, external vent; 107, branch pipe; 107h, inner annular groove; 202, protrusion; 107g, helical groove; 201, main pipe. ; 107b, slot; 200, spray head; 203, limiting ring plate; 306, double clamping plate; 300, locking component; 304, square slot; 303, square hole; 400, slider; 402, limiting end plate; 403, inclined surface; 401, guide block; 107f, annular conical groove; 500, pressure cap; 502, pressure plate; 302, outer annular groove; 501, side plate; 301, sleeve; 305, limiting block; 503, vertical slot. Detailed Implementation

[0020] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0021] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0022] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0023] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0024] Example 1

[0025] Reference Figures 1-8 This embodiment provides an ozone oxidation combined with hydrogen peroxide treatment device for denitrification of ship exhaust gas, comprising: The reaction chamber 100 has a flue gas inlet 101 on the bottom side wall and a drain outlet 102 at the bottom. Inside the reaction chamber 100, from bottom to top, there are an ozone jet pipe 103, a hydrogen peroxide spray pipe 104 and a mixing pipe 105. The top of the reaction chamber 100 has a flue gas outlet 106. A branch pipe 107 is installed below the hydrogen peroxide spray pipe 104, and a spray head 200 is connected to the branch pipe 107.

[0026] A conical water storage chamber is provided at the bottom of the reaction chamber 100, and a drain outlet 102 is provided at the bottom of the conical water storage chamber.

[0027] It should be noted that conventional flue gas treatment components such as a demister, a spray absorption layer, a porous absorption plate, and a baffle demister are also installed between the mixing pipe 105 and the flue gas outlet 106, which will not be described in detail.

[0028] An inner tube 107a is provided inside the branch pipe 107. A groove 107b is left between the inner tube 107a and the branch pipe 107. An annular groove is provided on the outer surface of the inner tube 107a. A sealing ring 107c is embedded in the annular groove.

[0029] A venting passage 107d is provided in the branch pipe 107 to connect the slot 107b with the outside of the branch pipe 107. The external vent 107e of the venting passage 107d is located lower than the internal vent.

[0030] The external vent 107e is the opening of the vent passage 107d on the outer wall of the branch pipe 107, and the internal vent is the connection between the vent passage 107d on the inner wall of the branch pipe 107 and the slot 107b.

[0031] The branch pipe 107 has an annular conical groove 107f on its outer side, a spiral groove 107g on its inner wall, and an inner annular groove 107h on the inner side of its end. The end of the spiral groove 107g is connected to the inner annular groove 107h.

[0032] The spray head 200 includes a main pipe 201, a protrusion 202 is provided on the outer side of the top of the main pipe 201, the protrusion 202 is embedded in the spiral groove 107g, and a limiting ring plate 203 is also provided on the outer side of the main pipe 201. The main tube 201 is embedded in the slot 107b.

[0033] A locking element 300 is provided on the outside of the spray head 200. The locking element 300 includes a sleeve 301 and a double clamping plate 306 disposed on the inside of the sleeve 301. The limiting ring plate 203 is embedded in the double clamping plate 306.

[0034] It should be noted that the double clamping plate 302 is a structure composed of two annular plates with a space between them. The limiting ring plate 203 is embedded in this space, so that the locking member 300 can rotate relative to the spray head 200.

[0035] The locking element 300 is sleeved on the outside of the branch pipe 107. The top outer side of the sleeve 301 is provided with an outer ring groove 302. The sleeve 301 is also provided with a square hole 303. The outer side of the square hole 303 is also provided with a square groove 304.

[0036] Branch pipe 107 is installed between main pipe 201 and sleeve 301.

[0037] A slider 400 is provided in the square hole 303. The slider 400 includes a guide block 401 and a limiting end plate 402. One end of the guide block 401 is provided with an inclined surface 403, and the end of the guide block 401 is embedded in the annular conical groove 107f.

[0038] It should be noted that the slider 400 is arc-shaped as a whole, and the inclined surface 403 is a conical surface in structure, so as to fit with the annular conical groove 107f.

[0039] The inclined surface 403 is in contact with the cone surface on the lower side of the annular cone groove 107f, and the cone surface is inclined downward.

[0040] Specifically, the guide block 401 has a sliding groove on its side and an insert is provided on the inner wall of the square hole 303. The insert is set in the sliding groove and is used to limit the guide block 401. That is, the guide block can move in the lateral direction, can enter the annular conical groove 107f for fixation, or can exit the annular conical groove 107f outward.

[0041] A pressure cap 500 is provided above the sleeve 301. The pressure cap 500 includes a side plate 501 and a pressure plate 502 provided on the side plate 501. The side plate 501 is embedded in the outer ring groove 302.

[0042] It should be noted that the pressure plate 502 is an annular plate, and a sealing pad is provided on the inner side of the pressure plate 502. After the locking part 300 is connected to the branch pipe 107, the sealing pad corresponds to the position of the external vent 107e.

[0043] The inner wall of the side plate 501 is provided with a vertical groove 503, and the sleeve 301 is also provided with a limiting block 305, which is embedded in the vertical groove 503.

[0044] In this invention, the installation process involves first lifting the pressure cap 500, then placing the pressure plate 502 over the outside of the branch pipe 107. The end of the main pipe 201 is placed in the inner annular groove 107h. The spray pipe and sleeve are rotated. During the rotation, the slider 400 moves outward under the action of centrifugal force. When the protrusion 202 corresponds to the position of the spiral groove 107g, the main pipe 201 is pushed upward. The main pipe 201 moves upward and rotates at a certain angle. At the same time, the sleeve 301 moves upward. When it reaches the bottom, the slider 400 moves to the position corresponding to the annular conical groove 107 and the pressure cap 500 is pressed down. It should be noted that the inner wall of the pressure cap is partially provided with an inclined slope. This inclined slope corresponds to the position of the slider 400. That is, when the pressure cap 500 is pressed down, the inner wall of the pressure cap 500 will push the slider 400 inward and squeeze the slider into the annular conical groove 107. At the same time, the slider as a whole enters the square hole and square groove. And because there is a pressure cap 500 on the outside, the slider 400 cannot move outward.

[0045] Therefore, in this invention, a constrained and fixed structure is formed as a whole. Specifically, since the slider cannot leave the annular conical groove 107, the sleeve can rotate relative to the branch pipe, but cannot move linearly relative to the branch pipe in the vertical direction. After the main pipe is embedded in the slot, due to the cooperation relationship between the protrusion and the helical groove, the main pipe needs to be able to move downward and rotate at the same time to be withdrawn. At this time, the main pipe cannot rotate or move downward, thus forming a fixed structure.

[0046] Furthermore, the sealing gasket blocks the external vent, creating a sealed space in the slot. At this point, it is not convenient to remove the main pipe, otherwise negative pressure will be generated.

[0047] During disassembly, simply lift the pressure cap 500 and pull down the entire spray head. The conical surface will push the slider outward into the annular conical groove. At the same time, the main pipe can be pulled down and the sleeve can also be moved down. Meanwhile, the external vent can be opened, achieving a quick disassembly effect and avoiding the accumulation of dirt and other substances that could cause the threaded structure to lock up, or other complex disassembly methods.

[0048] Therefore, this invention achieves the technical effect of easy disassembly.

[0049] It should be noted that the bottom of the spray head is simplified and does not show detailed structural features, as this is existing technology.

[0050] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0051] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A denitrification device for ship exhaust gas treated with a combination of ozone oxidation and hydrogen peroxide, characterized in that: include, The reaction chamber (100) has a flue gas inlet (101) on its bottom side wall, a drain outlet (102) at the bottom of the reaction chamber (100), and an ozone jet pipe (103), a hydrogen peroxide spray pipe (104), and a mixing pipe (105) arranged sequentially from bottom to top inside the reaction chamber (100). The top of the reaction chamber (100) has a flue gas outlet (106). A branch pipe (107) is provided below the hydrogen peroxide spray pipe (104), and a spray head (200) is connected to the branch pipe (107).

2. The ozone oxidation combined hydrogen peroxide treatment ship exhaust gas denitration device according to claim 1, characterized in that: The inner side of the branch pipe (107) is provided with an inner tube (107a), and a groove (107b) is left between the inner tube (107a) and the branch pipe (107). The outer surface of the inner tube (107a) is provided with an annular groove, and a sealing ring (107c) is embedded in the annular groove.

3. The ozone oxidation combined with hydrogen peroxide treatment ship exhaust gas denitration device according to claim 2, characterized in that: The branch pipe (107) is provided with a vent passage (107d) connecting the inter-slot (107b) and the outside of the branch pipe (107). The external vent (107e) of the vent passage (107d) is lower than the internal vent.

4. The ozone oxidation combined with hydrogen peroxide treatment ship exhaust gas denitration device according to claim 3, characterized in that: The branch pipe (107) has an annular conical groove (107f) on its outer side, a spiral groove (107g) on ​​its inner wall, and an inner annular groove (107h) on the inner side of the end of the branch pipe (107). The end of the spiral groove (107g) is connected to the inner annular groove (107h).

5. The ozone oxidation combined with hydrogen peroxide treatment ship exhaust gas denitration device according to claim 4, characterized in that: The spray head (200) includes a main pipe (201), a protrusion (202) is provided on the outer side of the top of the main pipe (201), the protrusion (202) is embedded in the spiral groove (107g), and a limiting ring plate (203) is also provided on the outer side of the main pipe (201). The main tube (201) is embedded in the slot (107b).

6. The ozone oxidation combined with hydrogen peroxide treatment denitrification device for ship exhaust gas according to claim 5, characterized in that: A locking member (300) is provided on the outside of the spray head (200). The locking member (300) includes a sleeve (301) and a double clamping plate (306) disposed on the inside of the sleeve (301). The limiting ring plate (203) is embedded in the double clamping plate (306).

7. The ozone oxidation combined with hydrogen peroxide treatment denitrification device for ship exhaust gas according to claim 6, characterized in that: The locking element (300) is sleeved on the outside of the branch pipe (107). The top outer side of the sleeve (301) is provided with an outer ring groove (302). The sleeve (301) is also provided with a square hole (303). The square hole (303) is also provided with a square groove (304) on the outside.

8. The ozone oxidation combined with hydrogen peroxide treatment denitrification device for ship exhaust gas according to claim 7, characterized in that: A slider (400) is provided in the square hole (303). The slider (400) includes a guide block (401) and a limiting end plate (402). One end of the guide block (401) is provided with an inclined surface (403), and the end of the guide block (401) is embedded in the annular conical groove (107f).

9. The ozone oxidation combined with hydrogen peroxide treatment denitrification device for ship exhaust gas according to claim 8, characterized in that: A pressure cap (500) is provided above the sleeve (301). The pressure cap (500) includes a side plate (501) and a pressure plate (502) disposed on the side plate (501). The side plate (501) is embedded in the outer ring groove (302).

10. The ozone oxidation combined with hydrogen peroxide treatment denitrification device for ship exhaust gas according to claim 9, characterized in that: The inner wall of the side plate (501) is provided with a vertical groove (503), and the sleeve (301) is also provided with a limiting block (305), which is embedded in the vertical groove (503).

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