A marine SCR denitration reactor

Abstract

The utility model discloses a marine SCR denitration reactor relates to marine exhaust gas treatment equipment technical field, including the reaction box, one end of reaction box is installed and penetrates the air inlet pipe, the outer wall of air inlet pipe is installed with the injection device, and the part of injection device inserts in the inside of air inlet pipe, the utility model discloses, through setting two groups of porous distribution board in the inside of reaction box, makes the exhaust gas even distribution through porous distribution board, through setting catalyst device, under the cooperation of multilayer catalyst module and two group vertical concave seat, the multilayer catalytic module is removed from the inside of reaction box conveniently, and the convenient installation, dismount and replacement, and the certain interval is left between catalyst module in multilayer catalyst module, to guarantee that exhaust gas can fully contact catalyst reaction, and under the cooperation of injection device and static mixer, can greatly improve the efficiency of denitration reaction.

Description

Technical Field

[0001] This utility model relates to the technical field of ship exhaust gas treatment equipment, and in particular to a marine SCR denitrification reactor. Background Technology

[0002] With increasing global emphasis on environmental protection, standards for controlling ship exhaust emissions are becoming increasingly stringent. Selective catalytic reduction (SCR) technology, as a highly efficient denitrification method, is widely used in ship exhaust treatment. Due to the stringent Tier III emission standards, it is necessary to install SCR denitrification or use dual-fuel systems to achieve compliance with nitrogen oxide emission standards.

[0003] However, existing marine SCR denitrification reactors still have some problems in practical use. The uniformity of exhaust gas flow in the reactor is poor, which prevents the catalyst from fully exerting its function and the denitrification efficiency needs to be improved. The reactor's structural design is not compact enough and occupies too much space on the ship. Therefore, a marine SCR denitrification reactor is proposed. Utility Model Content

[0004] The purpose of this invention is to improve exhaust gas treatment efficiency, optimize reactor structure, and enhance its adaptability to ship operating conditions, and to propose a marine SCR denitrification reactor.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a marine SCR denitrification reactor, comprising a reaction chamber, an air inlet pipe installed through one end of the reaction chamber, an injection device installed on the outer wall of the air inlet pipe, and a portion of the injection device inserted inside the air inlet pipe, a filter device fixedly installed at one end of the air inlet pipe, a static mixer fixedly installed on the inner wall of the reaction chamber near the air inlet pipe, two sets of porous distribution plates installed inside the reaction chamber, and the two sets of porous distribution plates dividing the internal space of the reaction chamber into an air inlet chamber, a reaction chamber and an air outlet chamber, and a catalyst device disposed inside the reaction chamber;

[0006] The catalyst device includes a sealing plate and a limiting guide assembly. Two sets of vertical recesses are installed through the upper end of the reaction chamber. Multi-layer catalyst modules are slidably inserted into the interior of the two sets of vertical recesses. The upper end of the multi-layer catalyst modules is fixed to the lower end of the sealing plate.

[0007] Preferably, the limiting guide assembly includes two sets of guide brackets, each set of guide brackets has a magnetic push plate slidably mounted on its outer wall, each set of magnetic push plates has two sets of plug-in blocks fixedly mounted on one end, and each set of guide brackets has a magnetic baffle fixedly mounted on one end.

[0008] Preferably, the lower end of the sealing plate is in contact with the upper end of the reaction chamber, and the lower part of the multilayer catalyst module is disposed inside the reaction chamber.

[0009] Preferably, four sets of limiting seats are fixedly installed at the upper end of the reaction chamber, and four sets of square holes are opened through the upper end of the sealing plate.

[0010] Preferably, a portion of each of the four sets of plug-in blocks is inserted into the interior of the four sets of limiting seats, and the lower ends of both sets of guide frames are fixed to the upper end of the reaction chamber.

[0011] Preferably, the upper parts of the four sets of limiting seats are respectively inserted into the four sets of square holes.

[0012] Preferably, an exhaust pipe is installed through the other end of the reaction chamber.

[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0014] 1. This utility model improves denitrification efficiency: By setting two sets of porous distribution plates inside the reaction chamber, the exhaust gas is evenly distributed through the porous distribution plates. By setting a catalyst device, with the cooperation of multi-layer catalyst modules and two sets of vertical recessed seats, it is easy to remove the multi-layer catalyst modules from the inside of the reaction chamber, which facilitates installation, disassembly and replacement. Moreover, a certain distance is left between the catalyst modules in the multi-layer catalyst module to ensure that the exhaust gas can fully contact the catalyst to react. With the cooperation of the injection device and the static mixer, the efficiency of the denitrification reaction can be greatly improved.

[0015] 2. This utility model has a compact structure: the main body of the reactor adopts a cuboid shape, the internal space is reasonably divided, and the catalyst device adopts a drawer-type structure, which makes the entire reactor structure compact, occupies little space on the ship, and is easy to install and maintain. Attached Figure Description

[0016] Figure 1 A three-dimensional structural schematic diagram of a marine SCR denitrification reactor is provided for this utility model;

[0017] Figure 2 This utility model provides a schematic diagram of the internal structure of the reaction chamber of a marine SCR denitrification reactor;

[0018] Figure 3 A partial top view of a marine SCR denitrification reactor is provided for this utility model;

[0019] Figure 4 This utility model presents a schematic diagram of the sealing plate and multi-layer catalyst module structure of a marine SCR denitrification reactor.

[0020] Legend: 1. Reaction chamber; 11. Inlet pipe; 12. Injection device; 13. Exhaust pipe; 14. Filter device; 15. Static mixer; 16. Porous distribution plate; 2. Catalyst device; 21. Sealing plate; 22. Vertical recessed seat; 23. Limiting and guiding assembly; 231. Guide frame seat; 232. Insert block; 233. Magnetic push plate; 234. Magnetic baffle; 24. Limiting seat; 25. Multi-layer catalyst module; 26. Square hole. Detailed Implementation

[0021] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0023] Example 1: As Figure 1 - Figure 4 As shown, this utility model provides a marine SCR denitrification reactor, including a reaction chamber 1. An air inlet pipe 11 is installed through one end of the reaction chamber 1. An injection device 12 is installed on the outer wall of the air inlet pipe 11, and a part of the injection device 12 is inserted into the interior of the air inlet pipe 11. A filter device 14 is fixedly installed at one end of the air inlet pipe 11. A static mixer 15 is fixedly installed on the inner wall of the reaction chamber 1 and on the side close to the air inlet pipe 11. Two sets of porous distribution plates 16 are installed inside the reaction chamber 1, and the two sets of porous distribution plates 16 divide the internal space of the reaction chamber 1 into an air inlet chamber, a reaction chamber and an air outlet chamber. A catalyst device 2 is provided inside the reaction chamber 1.

[0024] The catalyst device 2 includes a sealing plate 21 and a limiting guide assembly 23. Two sets of vertical recesses 22 are installed through the upper end of the reaction chamber 1. Multi-layer catalyst modules 25 are slidably inserted into the interior of the two sets of vertical recesses 22. The upper end of the multi-layer catalyst module 25 is fixed to the lower end of the sealing plate 21, and the lower end of the sealing plate 21 is in contact with the upper end of the reaction chamber 1. The lower part of the multi-layer catalyst module 25 is set inside the reaction chamber.

[0025] The specific setup and function of this embodiment are described below. By installing two sets of porous distribution plates 16 inside the reaction chamber 1, the two sets of porous distribution plates 16 divide the interior of the reaction chamber 1 into an air inlet chamber, a reaction chamber, and an air outlet chamber. The air inlet chamber and the air outlet chamber are located at both ends of the reactor body, and the reaction chamber is located in the middle. This layout allows the exhaust gas to be processed in an orderly manner in the reaction chamber 1, avoiding short circuits and turbulence of the exhaust gas.

[0026] Furthermore, the two sets of porous distribution plates 16 are located between the inlet chamber and the reaction chamber, and between the reaction chamber and the outlet chamber, respectively. The porous distribution plate 16 on the inlet chamber side can evenly disperse the exhaust gas entering the reaction chamber into the reaction chamber, ensuring that the catalyst in the reaction chamber can contact a relatively uniform exhaust gas flow rate, thereby improving the utilization efficiency of the catalyst. The porous distribution plate 16 on the outlet chamber side plays a rectifying role, allowing the gas after the reaction to flow out of the reaction chamber 1 smoothly.

[0027] By placing the multi-layer catalyst module 25 inside the reaction chamber, and leaving a certain gap between the catalyst modules in the multi-layer catalyst module 25 to ensure that the exhaust gas can fully contact and react with the catalyst, the multi-layer catalyst module 25 adopts a composite catalyst, which can improve the denitrification efficiency.

[0028] By installing an injection device 12 on the outer wall of the intake pipe 11 and a static mixer 15 inside the reaction chamber 1, the injection device 12 adopts a high-precision atomizing nozzle, which can uniformly spray urea solution into the exhaust gas. The static mixer consists of multiple staggered blades. The exhaust gas and the atomized urea solution are fully mixed in the static mixer 15, which promotes the reaction between the ammonia gas produced by urea pyrolysis and the nitrogen oxides in the exhaust gas, thereby improving the reaction rate and denitrification effect.

[0029] Example 2: Figure 2 and Figure 3 As shown, the limiting guide assembly 23 includes two sets of guide brackets 231. Magnetic push plates 233 are slidably installed on the outer walls of both sets of guide brackets 231. Two sets of plug-in blocks 232 are fixedly installed at one end of each set of magnetic push plates 233. Magnetic baffles 234 are fixedly installed at one end of each set of guide brackets 231. Four sets of limiting seats 24 are fixedly installed at the upper end of the reaction chamber 1. Four sets of square holes 26 are opened through the upper end of the sealing plate 21. Parts of the four sets of plug-in blocks 232 are inserted into the interiors of the four sets of limiting seats 24. The lower ends of both sets of guide brackets 231 are fixed to the upper end of the reaction chamber 1. The upper parts of the four sets of limiting seats 24 are inserted into the interiors of the four sets of square holes 26. An exhaust pipe 13 is installed through the other end of the reaction chamber 1.

[0030] The overall effect of this embodiment is that by installing a filter device 14 at one end of the intake pipe 11, large particulate impurities in the exhaust gas are filtered to prevent them from entering the reaction chamber 1 and clogging the multilayer catalyst module 25. The filter screen in the filter device 14 is removable, which makes it convenient to replace the filter screen later.

[0031] By moving the two sets of magnetic push plates 233 one by one, the two sets of magnetic push plates 233 slide on the two sets of guide frames 231 respectively. At the same time, the two sets of guide frames 231 will drive the four sets of plug-in blocks 232 to move, so that the four sets of plug-in blocks 232 are inserted into the four sets of limiting seats 24 respectively, until the two sets of magnetic push plates 233 contact the two sets of magnetic baffles 234 respectively, and the lower ends of the four sets of plug-in blocks 232 are in contact with the upper end of the sealing plate 21. Under the mutual magnetic attraction of the two sets of magnetic push plates 233 and the two sets of magnetic baffles 234, the four sets of plug-in blocks 232 can be limited, thereby fixing the sealing plate 21 and preventing the sealing plate 21 from separating from the reaction chamber 1.

[0032] The usage and working principle of this device are as follows: First, install the reaction chamber 1 in a suitable position in the ship's exhaust gas emission pipe, ensuring that the other end of the filter device 14 is tightly connected to the ship's exhaust gas emission pipe, and that the exhaust pipe 13 is correctly connected to the subsequent treatment device or atmospheric emission port. Finally, when the ship is running, the exhaust gas will first enter the interior of the reaction chamber 1 when it enters the interior of the filter device 14. After the filter device 14 filters out large particulate impurities, it will be fully mixed in the static mixer 15 with the atomized urea solution sprayed by the injection device 12. The mixed gas will then enter the reaction chamber evenly through the porous distribution plate 16 on the air inlet side. Under the action of the multi-layer catalyst module 25, nitrogen oxides and ammonia react and are reduced to nitrogen and water. After the reaction, the gas will be rectified by the porous distribution plate 16 on the air outlet side and discharged from the interior of the reaction chamber 1 through the exhaust pipe 13.

[0033] The above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from the technical solution of this utility model shall still fall within the protection scope of this utility model.

Claims

1. A marine SCR denitrification reactor, comprising a reaction chamber (1), characterized in that: An air inlet pipe (11) is installed through one end of the reaction chamber (1). An injection device (12) is installed on the outer wall of the air inlet pipe (11), and a part of the injection device (12) is inserted into the interior of the air inlet pipe (11). A filter device (14) is fixedly installed at one end of the air inlet pipe (11). A static mixer (15) is fixedly installed on the inner wall of the reaction chamber (1) and on the side close to the air inlet pipe (11). Two sets of porous distribution plates (16) are installed inside the reaction chamber (1), and the two sets of porous distribution plates (16) divide the internal space of the reaction chamber (1) into an air inlet chamber, a reaction chamber and an air outlet chamber. A catalyst device (2) is installed inside the reaction chamber (1). The catalyst device (2) includes a sealing plate (21) and a limiting guide assembly (23). Two sets of vertical recesses (22) are installed through the upper end of the reaction chamber (1). Multi-layer catalyst modules (25) are slidably inserted into the interior of the two sets of vertical recesses (22). The upper end of the multi-layer catalyst modules (25) is fixed to the lower end of the sealing plate (21).

2. The marine SCR denitrification reactor according to claim 1, characterized in that: The limiting guide assembly (23) includes two sets of guide brackets (231). Magnetic push plates (233) are slidably installed on the outer walls of both sets of guide brackets (231). Two sets of plug-in blocks (232) are fixedly installed at one end of each set of magnetic push plates (233). Magnetic baffles (234) are fixedly installed at one end of each set of guide brackets (231).

3. The marine SCR denitrification reactor according to claim 1, characterized in that: The lower end of the sealing plate (21) is in contact with the upper end of the reaction chamber (1), and the lower part of the multilayer catalyst module (25) is disposed inside the reaction chamber.

4. A marine SCR denitrification reactor according to claim 2, characterized in that: The upper end of the reaction chamber (1) is fixedly equipped with four sets of limiting seats (24), and the upper end of the sealing plate (21) is provided with four sets of square holes (26).

5. A marine SCR denitrification reactor according to claim 4, characterized in that: A portion of each of the four sets of plug-in blocks (232) is inserted into the interior of the four sets of limiting seats (24), and the lower ends of the two sets of guide frames (231) are fixed to the upper end of the reaction chamber (1).

6. A marine SCR denitrification reactor according to claim 4, characterized in that: The upper parts of the four sets of limiting seats (24) are respectively inserted into the four sets of square holes (26).

7. A marine SCR denitrification reactor according to claim 1, characterized in that: An exhaust pipe (13) is installed through the other end of the reaction chamber (1).

Images