Ammonia homogenizing device for improving efficiency of SCR (Selective Catalytic Reduction) catalyst
By adopting a dual-nozzle design and a flow guide mixer, an ammonia equalizer, and a flue gas distribution plate in the SCR denitrification system, the problem of uneven mixing of ammonia and flue gas was solved, achieving efficient catalyst reaction and improved system stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGDONG GRVNES ENVIRONMENTAL PROTECTION TECH CO LTD
- Filing Date
- 2025-02-13
- Publication Date
- 2026-04-24
AI Technical Summary
Traditional single-nozzle ammonia injection schemes are difficult to achieve uniform mixing of ammonia and flue gas in SCR denitrification systems, resulting in uneven local ammonia concentrations, ammonia waste and escape, and insufficient utilization of catalyst active sites, thus affecting denitrification efficiency.
The system adopts a dual-nozzle design and is equipped with a flow guide mixer and an ammonia equalizer in the connecting pipe. Combined with the flow guide groove on the flue gas distribution plate, it ensures that the ammonia and flue gas are evenly mixed in front of the catalyst packing plate. The flow guide mixer initially disperses the ammonia, and the ammonia equalizer achieves uniform distribution of ammonia in the flue gas.
This achieves uniform mixing of ammonia and flue gas, improves the reaction effect of the catalyst, extends the service life of the catalyst, and enhances the stability and denitrification efficiency of the SCR system.
Smart Images
Figure CN224156672U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of ammonia homogenization device technology, specifically to an ammonia homogenization device for improving the efficiency of SCR catalysts. Background Technology
[0002] In SCR denitrification systems, uniform mixing of ammonia and flue gas is one of the core elements to ensure the efficient operation of the catalyst. However, traditional ammonia injection devices and mixing methods have many shortcomings, which seriously restrict the improvement of SCR catalyst efficiency.
[0003] Based on the above, the inventors have discovered the following problems: Traditional single-nozzle ammonia injection schemes face severe challenges in actual operation. Due to the complex flow characteristics of flue gas within the flue, the ammonia injected from a single nozzle is difficult to fully and uniformly mix with the flue gas over a short distance, often resulting in localized excessively high or low ammonia concentrations. When the ammonia concentration is too high, it not only wastes ammonia but may also exacerbate ammonia escape, leading to a series of problems such as blockage and corrosion in subsequent equipment. Conversely, areas with excessively low ammonia concentrations cannot provide sufficient reactants for the catalyst, preventing the catalyst's active sites from being fully utilized and significantly reducing denitrification efficiency. Therefore, in view of this, the inventors have researched and improved upon existing structures and shortcomings, providing an ammonia equalization device to enhance the efficiency of SCR catalysts, aiming to achieve a more practical application. Utility Model Content
[0004] The purpose of this invention is to provide an ammonia homogenization device to improve the efficiency of SCR catalysts, thereby solving the problems mentioned in the background art.
[0005] By adopting the above technical solution, uniform injection of ammonia gas is achieved, thereby improving the reaction efficiency of the catalyst. In view of the above problems, the technical solution proposed by this utility model is:
[0006] An ammonia homogenizing device for improving SCR catalyst efficiency includes a main body and a reaction mechanism. The main body includes a connecting pipe with first flanges installed at both ends. Nozzles are inserted into both sides of one end of the connecting pipe. A flow guide mixer is installed inside the connecting pipe near the nozzles, and an ammonia homogenizing mixer is installed inside the connecting pipe on one side of the flow guide mixer. The reaction mechanism includes a reaction chamber with conical side plates installed at both ends. Second flanges are installed at both ends of the conical side plates. One of the first flanges and one of the second flanges are connected by bolts. A flue gas distribution plate is installed inside one of the conical side plates near the connecting pipe. A catalyst filling plate is provided inside the reaction chamber on the side near the flue gas distribution plate.
[0007] Furthermore, the flue gas distribution plate is provided with a number of guide grooves, and the number of guide grooves are distributed at equal distances.
[0008] The beneficial effect of adopting the above-mentioned further scheme is that by opening several equally distributed guide grooves on the flue gas distribution plate, the flue gas can flow evenly to the area where the catalyst packing plate is located.
[0009] Furthermore, a cover plate is installed at the upper end of the reaction chamber, and a first hanging ring is installed on both sides of the upper end of the cover plate.
[0010] The beneficial effect of adopting the above-mentioned further solution is that by installing a cover plate, it is convenient for users to replace the catalyst packing plate inside the reaction chamber regularly, and by installing a first hanging ring, it is convenient for users to lift the cover plate to facilitate the replacement of the catalyst packing plate.
[0011] Furthermore, a second hanging ring is installed on both sides of the upper end face of the connecting pipe, and a pair of third hanging rings are installed on both sides of the reaction box.
[0012] The beneficial effect of adopting the above-mentioned further solution is that by installing the second hanging ring, it is convenient for the user to hoist the connecting pipe, and by installing the third hanging ring, it is convenient for the user to hoist the reaction box.
[0013] Furthermore, the reaction chamber is equipped with feet at all four corners of its bottom.
[0014] The advantage of adopting the above-mentioned further solution is that by installing feet at the four corners of the bottom of the reaction chamber, it is convenient to support and fix the reaction chamber.
[0015] The beneficial effects of this utility model are as follows: This utility model provides an ammonia equalization device for improving the efficiency of SCR catalysts through the above design. This ammonia equalization device for improving the efficiency of SCR catalysts uses a dual-nozzle ammonia injection system, and a flow guide mixer and an ammonia equalization mixer are sequentially equipped in the connecting pipe. This achieves the mixing of ammonia and flue gas. The flow guide mixer causes the flue gas to generate a specific flow pattern, initially dispersing the ammonia. The ammonia equalization mixer achieves uniform distribution of ammonia in the flue gas, effectively avoiding situations where the local ammonia concentration is too high or too low. This provides a more uniform reactant environment for the SCR catalyst, fully utilizing the active sites of the catalyst, thereby significantly improving the denitrification efficiency. The conical side plates at both ends of the reaction chamber and the flue gas distribution plate installed inside one of the conical side plates can reasonably distribute and turbulent the flue gas entering the reaction chamber. Several flow guide grooves on the flue gas distribution plate allow the flue gas to flow evenly to the area where the catalyst filling plate is located, ensuring that the mixture of ammonia and flue gas is evenly distributed across the entire catalyst cross-section before entering the catalyst. This ensures the reaction balance of each part of the catalyst, extends the service life of the catalyst, and further improves the stability and reliability of the entire SCR system. Attached Figure Description
[0016] Figure 1 This is a partial side cross-sectional schematic diagram of the ammonia homogenization device for improving SCR catalyst efficiency disclosed in an embodiment of this utility model;
[0017] Figure 2 This is a partial top cross-sectional view of the ammonia homogenization device for improving SCR catalyst efficiency disclosed in an embodiment of the present invention.
[0018] Figure 3 This is a partial front cross-sectional schematic diagram of the ammonia homogenization device for improving the efficiency of SCR catalyst disclosed in an embodiment of this utility model.
[0019] In the diagram: 100, main body; 1001, connecting pipe; 1002, flow guide mixer; 1003, nozzle; 1004, second hanging ring; 1005, first flange; 1006, ammonia equalization mixer; 200, reaction mechanism; 2001, reaction chamber; 2002, conical side plate; 2003, flue gas distribution plate; 2004, catalyst filling plate; 2005, second flange; 2006, foot; 2007, first hanging ring; 2008, cover plate; 2009, third hanging ring. Detailed Implementation
[0020] 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.
[0021] Please see Figure 1 - Figure 3This utility model provides a technical solution: an ammonia homogenizing device for improving the efficiency of SCR catalysts, comprising a main body 100 and a reaction mechanism 200. The main body 100 includes a connecting pipe 1001, with first flanges 1005 installed at both ends of the connecting pipe 1001. Spray nozzles 1003 are inserted into both sides of one end of the connecting pipe 1001. A flow guide mixer 1002 is installed inside the connecting pipe 1001 on the side near the spray nozzle 1003, and an ammonia homogenizing mixer 1006 is installed inside the connecting pipe 1001 on the side of the flow guide mixer 1002. The reaction mechanism 200 includes a reaction chamber 2001. Conical side plates 2002 are installed at both ends of the reaction chamber 2001, and second flanges 2005 are installed at both ends of each conical side plate 2002. One first flange 1005 and one second flange 2005 are connected by bolts. A flue gas distribution plate 2003 is installed inside one of the conical side plates 2002 near the connecting pipe 1001. A catalyst filling plate 2004 is provided inside the reaction chamber 2001 on the side near the flue gas distribution plate 2003. A dual-nozzle configuration is also included. Ammonia is injected into the reaction chamber 2003, and a flow guide mixer 1002 and an ammonia homogenizer 1006 are sequentially installed in the connecting pipe 1001 to achieve mixing of ammonia and flue gas. The flow guide mixer 1002 promotes a specific flow pattern in the flue gas, initially dispersing the ammonia. The ammonia homogenizer 1006 achieves uniform distribution of ammonia in the flue gas, effectively avoiding situations where the local ammonia concentration is too high or too low. This provides a more uniform reactant environment for the SCR catalyst, fully utilizing the active sites of the catalyst, thereby significantly improving the denitrification efficiency. The cones at both ends of the reaction chamber 2001... The side plate 2002 and the flue gas distribution plate 2003 installed inside one of the conical side plates 2002 can reasonably distribute and turbulent the flue gas entering the reaction chamber 2001. Several guide grooves on the flue gas distribution plate 2003 make the flue gas flow evenly to the area where the catalyst filling plate 2004 is located, ensuring that the mixture of ammonia and flue gas is evenly distributed across the entire catalyst cross section before entering the catalyst, thus ensuring the reaction balance of each part of the catalyst, extending the service life of the catalyst, and further improving the stability and reliability of the entire SCR system.
[0022] 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.
[0023] Please see Figure 1 - Figure 3The flue gas distribution plate 2003 has several guide grooves, which are evenly distributed. A cover plate 2008 is installed on the upper end of the reaction chamber 2001. First hanging rings 2007 are installed on both sides of the upper end of the cover plate 2008. Second hanging rings 1004 are installed on both sides of the upper end face of the connecting pipe 1001. A pair of third hanging rings 2009 are installed on both sides of the reaction chamber 2001. Foot anchors 2006 are installed at the four corners of the bottom of the reaction chamber 2001. By creating several evenly distributed guide grooves on the flue gas distribution plate 2003, the flue gas flows evenly to the catalyst packing plate 200. In the 4th area, by installing a cover plate 2008, users can easily replace the catalyst filling plate 2004 inside the reaction chamber 2001 periodically. By installing a first hanging ring 2007, users can easily lift the cover plate 2008 to facilitate the replacement of the catalyst filling plate 2004. By installing a second hanging ring 1004, users can easily lift the connecting pipe 1001. By installing a third hanging ring 2009, users can easily lift the reaction chamber 2001. By installing foot 2006 at the four corners of the bottom of the reaction chamber 2001, users can easily support and fix the reaction chamber 2001.
[0024] Specifically, the working principle of this ammonia homogenization device for improving SCR catalyst efficiency is as follows: During operation, ammonia gas is injected into the flue gas inside the connecting pipe 1001 through nozzles 1003 on both sides of one end of the connecting pipe 1001. At this time, the flow guide mixer 1002 near the nozzle 1003 begins to function. The flow guide mixer 1002 causes the flue gas to generate a specific flow pattern, increasing the contact opportunities and collision frequency between the flue gas and ammonia gas, so that the ammonia gas is initially dispersed in the flue gas, initially improving the mixing state of ammonia and flue gas. After the initial mixing by the flow guide mixer 1002, the flue gas and ammonia mixture continues to flow to the ammonia homogenization mixer 1006. When the mixture passes through the ammonia homogenization mixer 1006, the distribution of ammonia gas in the flue gas is further homogenized, improving the uniformity of ammonia concentration. After homogenization, the flue gas and ammonia mixture enters the reaction chamber 2001 through the flange connecting the connecting pipe 1001 and the reaction chamber 2001. Inside the conical side plate 2002 at one end of 001, the flue gas distribution plate 2003 installed inside the conical side plate 2002 begins to work. Several equally spaced guide grooves on the flue gas distribution plate 2003 guide the flue gas to flow evenly to the area where the catalyst packing plate 2004 is located. The mixture of ammonia and flue gas is evenly distributed across the entire catalyst cross section. The evenly distributed reactants are in full contact with the catalyst on the catalyst packing plate 2004, and the active sites of the catalyst are fully utilized, thereby efficiently carrying out the denitrification reaction and improving the denitrification efficiency of the SCR catalyst. During the reaction, the cover plate 2008 at the top of the reaction chamber 2001 serves to seal the reaction space. The second hanging ring 1004 at the top of the connecting pipe 1001 and the third hanging rings 2009 on both sides of the reaction chamber 2001 can be used for hoisting the device. The feet 2006 at the bottom of the reaction chamber 2001 are used to support and stabilize the position of the reaction chamber 2001.
Claims
1. An ammonia homogenization device for improving the efficiency of SCR catalysts, characterized in that, The system includes a main body (100) and a reaction mechanism (200). The main body (100) includes a connecting pipe (1001), with first flanges (1005) installed at both ends of the connecting pipe (1001). Spray nozzles (1003) are inserted into both sides of one end of the connecting pipe (1001). A flow guide mixer (1002) is installed inside the connecting pipe (1001) on the side near the spray nozzle (1003). An ammonia homogenizer (1006) is installed inside the connecting pipe (1001) on one side of the flow guide mixer (1002). The reaction mechanism (200) includes a reaction... The reaction chamber (2001) has conical side plates (2002) installed at both ends, and second flanges (2005) installed at both ends of the conical side plates (2002). One of the first flanges (1005) and one of the second flanges (2005) are connected by bolts. A flue gas distribution plate (2003) is installed inside one of the conical side plates (2002) near the end of the connecting pipe (1001). A catalyst filling plate (2004) is provided inside the reaction chamber (2001) on the side near the flue gas distribution plate (2003).
2. The ammonia homogenization device for improving SCR catalyst efficiency according to claim 1, characterized in that, The flue gas distribution plate (2003) has several guide grooves, and the guide grooves are distributed at equal distances.
3. The ammonia homogenization device for improving SCR catalyst efficiency according to claim 1, characterized in that, The upper end of the reaction chamber (2001) is equipped with a cover plate (2008), and the upper ends of the cover plate (2008) are equipped with first hanging rings (2007) on both sides.
4. The ammonia homogenization device for improving SCR catalyst efficiency according to claim 1, characterized in that, The upper end face of the connecting pipe (1001) is equipped with a second hanging ring (1004) on both sides, and the reaction box (2001) is equipped with a pair of third hanging rings (2009) on both sides.
5. The ammonia homogenization device for improving SCR catalyst efficiency according to claim 1, characterized in that, The reaction chamber (2001) is equipped with feet (2006) at the four corners of its bottom.