A new high-temperature flue gas purification device
Patent Information
- Application Number
- CN202522514503.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-27
- Publication Date
- 2026-10-20
- Estimated Expiration
- 2035-11-27
AI Technical Summary
现有装置通常是直接将管道连通焚烧炉，其中焚烧炉产生的烟气中携带的粉尘不仅易附着在催化剂表面，造成催化剂堵塞、活性下降，缩短催化剂使用寿命，还会吸附还原介质（如尿素雾化液），进一步加剧烟气与还原介质混合均匀性差的问题，使得部分区域还原介质浓度过高或过低，最终导致NOx脱除效率不稳定，难以达到理想净化效果；因此，需要对上述问题进行改进
[0010]与现有技术相比，本实用新型的有益效果是：本实用新型通过除尘检测管内的高温陶瓷过滤除尘器与管道的插设配合，可预先过滤烟气中的粉尘，减少粉尘进入后续工序的量，提高了烟气清洁度，进而能够避免粉尘吸附还原介质及附着在催化剂表面；再通过混合管内倾斜叶片与倾斜挡片的协同配合，引导烟气与还原介质形成紊流，提高了二者混合的均匀性，进而能够确保还原介质浓度分布均衡；最终解决了现有装置中粉尘吸附还原介质和加剧混合不均的问题，提升了烟气净化效果与催化剂使用寿命。
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Figure CN224865220U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of high-temperature flue gas purification technology, and in particular to a novel high-temperature flue gas purification device. Background Technology
[0002] In industrial production processes (such as power, steel, and chemical industries), high-temperature flue gas emissions are a major source of pollution. The nitrogen oxides (NOx) and particulate matter contained in these flue gas can severely damage the atmospheric environment and fail to meet environmental emission standards. Currently, most mainstream high-temperature flue gas purification methods employ SCR (Selective Catalytic Reduction) technology. Existing devices typically connect pipelines directly to the incinerator. Dust carried in the flue gas produced by the incinerator not only easily adheres to the catalyst surface, causing catalyst blockage, reduced activity, and shortened catalyst lifespan, but also adsorbs reducing media (such as urea atomizing liquid), further exacerbating the problem of poor uniformity in the mixing of flue gas and reducing media. This results in excessively high or low concentrations of reducing media in some areas, ultimately leading to unstable NOx removal efficiency and difficulty in achieving the desired purification effect. Therefore, improvements are needed to address these issues. Utility Model Content
[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing a novel high-temperature flue gas purification device.
[0004] To achieve the above objectives, this utility model adopts the following technical solution: a novel high-temperature flue gas purification device, comprising an SCR reactor, wherein multiple inspection covers are fixedly connected to the top surface of the SCR reactor by bolts at equal intervals; one end flange of the SCR reactor is connected to one end of a mixing pipe, and a mixing component is installed inside the mixing pipe; one end flange of the SCR reactor is connected to one end of an outlet pipe, and the other end of the outlet pipe is connected to and fixedly connected to a chimney; one end flange of the mixing pipe is connected to one end of a spray pipe, and the other end flange of the spray pipe is connected to a dust removal detection pipe; an installation frame is fixedly connected to the lower end of the multiple inspection covers inside the SCR reactor; a through groove for inserting a catalyst is opened on the top surface of the installation frame; and two hook rings are symmetrically provided on the top surface of the catalyst.
[0005] Preferably, the inner wall of the spray pipe has multiple vertically arranged vertical pipes at equal intervals, and the multiple vertical pipes have multiple nozzles at equal intervals on one end face facing the mixing pipe. The bottom ends of the multiple vertical pipes extend out of the lower end of the outer wall of the spray pipe and are connected in parallel to an infusion pipe. One end of the infusion pipe is connected to and fixedly connected to the output end of a pump, and the input end of the pump is connected to and fixedly connected to a urea tank.
[0006] Preferably, the mixing assembly includes bearings equidistantly fixed to the inner wall of the mixing tube. The inner ring of the bearings is equidistantly fixed with a plurality of inclined blades, one end of which faces the axis of the mixing tube. The inner wall of the mixing tube is fixed with a plurality of sets of inclined baffles between the bearings. Each set of inclined baffles consists of two inclined baffles arranged at opposite inclinations, which are inverted figure-eight shapes when viewed from above.
[0007] Preferably, a high-temperature ceramic filter dust collector is installed inside the pipe at the outer end of the dust removal detection tube.
[0008] Preferably, the inner walls on both sides of the mounting frame are symmetrically provided with dovetail grooves, and dovetail blocks adapted to the dovetail grooves are fixed to both sides of the catalyst.
[0009] Preferably, a Nox sensor and a temperature sensor are installed in both the exhaust pipe and the dust detection pipe. A data processor is provided on one side of the exhaust pipe and the dust detection pipe. The data processor is electrically connected to the Nox sensor and the temperature sensor via a data cable. A control cabinet installed on the ground is provided on one side of the SCR reactor.
[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model, through the combination of a high-temperature ceramic filter dust collector in the dust removal detection tube and the insertion of the pipeline, can pre-filter dust in the flue gas, reduce the amount of dust entering subsequent processes, improve the cleanliness of the flue gas, and thus prevent dust from adsorbing the reducing medium and adhering to the catalyst surface; furthermore, through the coordinated cooperation of the inclined blades and inclined baffles in the mixing tube, the flue gas and the reducing medium are guided to form turbulent flow, improving the uniformity of the mixing between the two, and thus ensuring a balanced distribution of the reducing medium concentration; ultimately, it solves the problems of dust adsorbing the reducing medium and aggravating uneven mixing in existing devices, and improves the flue gas purification effect and catalyst lifespan. Attached Figure Description
[0011] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a first-view schematic diagram of the overall structure proposed in this utility model; Figure 2 This is a schematic cross-sectional view of the SCR reactor proposed in this utility model; Figure 3 This is a first-view schematic diagram of some of the component structures proposed in this utility model; Figure 4 This is a second-view schematic diagram of some of the component structures proposed in this utility model.
[0012] The numbers in the diagram are: 1. SCR reactor; 2. Inspection cover; 3. Mixing pipe; 4. Gas outlet pipe; 5. Chimney; 6. Spray pipe; 7. Dust removal detection pipe; 8. Control cabinet; 9. Urea tank; 10. Inclined blades; 11. Inclined baffle; 12. Catalyst; 13. Mounting frame. Detailed Implementation
[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0014] Example: See Figures 1 to 4This utility model discloses a novel high-temperature flue gas purification device, comprising an SCR reactor 1. Multiple inspection covers 2 are equidistantly bolted to the top surface of the SCR reactor 1. One end of the SCR reactor 1 is flanged and connected to one end of a mixing pipe 3, which houses a mixing assembly. The other end of the SCR reactor 1 is flanged and connected to one end of an outlet pipe 4, which is connected to and fixedly connected to a chimney 5. The other end of the mixing pipe 3 is flanged and connected to one end of a spray pipe 6, which is flanged and connected to a dust removal detection pipe 7. Inside the SCR reactor 1, below the multiple inspection covers 2, is a mounting frame 13. The top surface of the mounting frame 13 has a slot for inserting a catalyst 12, and the top surface of the catalyst 12 is symmetrically provided with two hooks. Reactor 1 is made of 316L stainless steel, which has excellent high temperature resistance and corrosion resistance. As the core reaction carrier, it works in conjunction with the 20G boiler steel mixing pipe 3, spray pipe 6, and dust detection pipe 7 to form a stable flue gas purification channel. The inspection cover 2 is made of Q235 carbon steel, with high structural strength and good sealing performance, facilitating internal maintenance. The mounting frame 13 is made of Q345 low-alloy high-strength steel, with strong load-bearing capacity, providing a stable installation foundation for the V2O5-WO3 / TiO2 honeycomb catalyst 12. The hooks made of 45# steel facilitate the disassembly and assembly of the catalyst 12. These components together form the basic framework of the device, providing structural support for integrated flue gas denitrification and dust removal purification. Multiple vertically spaced pipes are arranged on the inner wall of the spray pipe 6. Multiple nozzles are equidistantly arranged on one end of the vertical pipe facing the mixing pipe 3. The bottom ends of the vertical pipes extend beyond the lower end of the outer wall of the spray pipe 6 and are connected in parallel to a delivery pipe. One end of the delivery pipe is connected to the output end of the pump, and the input end of the pump is connected to the urea tank 9. The vertical pipes, nozzles, and delivery pipe are all made of 304 stainless steel, which is corrosion-resistant and does not easily form scale, thus achieving uniform spraying of the reducing medium. The pump is a QBY3-25 type pneumatic diaphragm pump, which provides stable power. Together with the PE polyethylene urea tank 9, it provides continuous power and safe storage space for the delivery of the reducing medium, ensuring a stable supply of the reducing medium and improving the initial mixing effect of the reducing medium and flue gas, laying the foundation for subsequent deep mixing. The mixing components are equidistantly fixed on the inner wall of the mixing pipe 3. The bearing has multiple inclined blades 10 with one end facing the axis of the mixing tube 3, which are equidistantly fixed to the inner ring of the bearing. Multiple sets of inclined baffles 11 are fixed to the inner wall of the mixing tube 3 between the bearing gaps. Each set of inclined baffles 11 consists of two inclined baffles 11 that are set relatively inclined, and they are inverted V-shape when viewed from above. The inclined blades 10 and the inclined baffles 11 are both made of 1Cr18Ni9Ti stainless steel, which has strong wear resistance and deformation resistance and can withstand the scouring of flue gas for a long time. The bearing drives the inclined blades 10 to rotate with the flow of flue gas. With the guiding effect of the inverted V-shaped inclined baffles 11, the flue gas and the reducing medium are guided to form turbulence, which greatly improves the uniformity of the mixing between the two, ensures the balanced distribution of the reducing medium concentration, and improves the sufficiency of the NOx removal reaction.
[0015] In this invention, a high-temperature ceramic filter dust collector is inserted into the outer end of the dust removal detection tube 7. The high-temperature ceramic filter dust collector uses a high-temperature ceramic filter element, which has high filtration accuracy and high temperature resistance. Through this insertion installation method, dust in the flue gas can be quickly filtered, reducing the amount of dust entering subsequent processes, preventing dust from adsorbing the reducing medium and adhering to the surface of the catalyst 12, ensuring the activity and mixing effect of the catalyst 12, and reducing the risk of equipment blockage. The inner walls of both sides of the mounting frame 13 have symmetrical dovetail grooves, and dovetail blocks adapted to the dovetail grooves are fixed to both sides of the catalyst 12. The dovetail blocks are made of 45# steel, which has high hardness and good toughness, matching the Q34 steel of the mounting frame 13. The use of low-alloy high-strength steel ensures precise positioning and installation of the catalyst 12. Simultaneously, the symmetrical hook design on the top surface simplifies the disassembly and assembly process of the catalyst 12, improving maintenance convenience, shortening downtime for maintenance, and reducing maintenance costs. Both the exhaust pipe 4 and the dust collection detection pipe 7 are equipped with NOx and temperature sensors. A data processor is located on one side of the exhaust pipe 4 and the dust collection detection pipe 7, and the data processor is electrically connected to the NOx and temperature sensors via data cables. A control cabinet 8 is installed on the ground on one side of the SCR reactor 1. The NOx sensor uses CityTechnology E20X-NO... x The device is equipped with a nitrogen oxide sensor and a PT100 platinum resistance temperature sensor. The data processor is a matching device for both, which can accurately receive and analyze real-time flue gas parameters. The control cabinet 8 is an S7-200 programmable logic control cabinet. After receiving the feedback results from the data processor, it can accurately control the purification process, ensure stable and compliant purification effect, and improve the intelligence and reliability of the device operation.
[0016] Working Principle: When this utility model is used, after the device is started, the high-temperature flue gas generated by the incinerator first enters the dust removal detection tube 7. The high-temperature ceramic filter dust collector inside the tube pre-treats the flue gas, efficiently filtering and removing the dust carried in the flue gas, preventing the dust from entering subsequent processes with the flue gas. At the same time, the NOx sensor and temperature sensor inside the dust removal detection tube 7 collect the pollutant concentration and temperature data of the pre-treated flue gas in real time, and transmit the data to the data processor. The data processor analyzes the data and feeds it back to the control cabinet 8, providing a basis for adjusting the parameters of the subsequent purification process; subsequently, after dust removal... The pretreated flue gas enters the spray pipe 6. The control cabinet 8 starts the pump, which delivers the urea solution from the urea tank 9 to multiple vertical pipes in the spray pipe 6 via a delivery pipe. The solution is then atomized by multiple nozzles on the vertical pipes and evenly sprayed into the flue gas, completing the initial mixing of the reducing medium and the flue gas. The pre-mixed flue gas and the reducing medium enter the mixing pipe 3 together. During the flow of the flue gas, the inclined blades 10 of the bearing inner ring in the mixing pipe 3 rotate, and at the same time, they collide with multiple sets of inverted V-shaped inclined baffles 11 between the gaps. Under the stirring action of the inclined blades 10 and the guiding action of the inclined baffles 11, The flue gas and the reducing medium form a strong turbulent flow, achieving deep and uniform mixing and ensuring a balanced concentration distribution of the reducing medium in the flue gas. The uniformly mixed flue gas then enters the SCR reactor 1. Under the action of the catalyst 12 mounted on the frame 13 inside the reactor, NOx in the flue gas undergoes a selective catalytic reduction reaction with the reducing medium, achieving efficient NOx removal. The catalyst 12 is inserted into the dovetail grooves on the inner wall of the frame 13 via dovetail blocks on both sides, and with symmetrically arranged hooks on the top, it can be easily disassembled and replaced, preventing the catalyst 12 from becoming clogged or losing activity due to long-term use. The purification effect is affected; the purified flue gas is discharged through the exhaust pipe 4. The NOx sensor and temperature sensor in the exhaust pipe 4 monitor the purified flue gas in real time, and the monitoring data is also transmitted to the data processor. If the pollutant concentration is found to be substandard, the control cabinet 8 can adjust the pump flow rate and other parameters in a timely manner to ensure stable purification effect. Finally, the flue gas that meets the standard is discharged into the atmosphere through the chimney 5. Throughout the process, the multiple inspection covers 2 on the top surface of the SCR reactor 1 can facilitate the staff to regularly inspect and maintain the internal components of the reactor, ensuring the long-term stable operation of the device; at this point, the device is used and completed.
[0017] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A novel high-temperature flue gas purification device, comprising an SCR reactor (1), characterized in that: The top surface of the SCR reactor (1) is bolted with multiple inspection covers (2) at equal intervals. One end flange of the SCR reactor (1) is connected to one end of a mixing pipe (3). A mixing component is installed inside the mixing pipe (3). The other end flange of the SCR reactor (1) is connected to one end of an outlet pipe (4). The other end of the outlet pipe (4) is connected to a chimney (5). The other end flange of the mixing pipe (3) is connected to one end of a spray pipe (6). The other end flange of the spray pipe (6) is connected to a dust removal detection pipe (7). Inside the SCR reactor (1), a mounting frame (13) is fixed to the lower end of the multiple inspection covers (2). The top surface of the mounting frame (13) has a through groove for inserting a catalyst (12). The top surface of the catalyst (12) is symmetrically provided with two hook rings.
2. The novel high-temperature flue gas purification device according to claim 1, characterized in that: The inner wall of the spray pipe (6) has multiple vertical pipes arranged at equal intervals. Multiple nozzles are provided at equal intervals on one end face of the multiple vertical pipes facing the mixing pipe (3). The bottom end of the multiple vertical pipes extends out of the lower end of the outer wall of the spray pipe (6) and is connected in parallel to an infusion pipe. One end of the infusion pipe is connected to the output end of a pump, and the input end of the pump is connected to a urea tank (9).
3. The novel high-temperature flue gas purification device according to claim 2, characterized in that: The mixing assembly includes bearings that are equidistantly fixed to the inner wall of the mixing tube (3). The inner ring of the bearings is equidistantly fixed with a plurality of inclined blades (10) with one end facing the axis of the mixing tube (3). The inner wall of the mixing tube (3) is fixed with a plurality of sets of inclined baffles (11) between the bearings. Each set of inclined baffles (11) consists of two inclined baffles (11) that are inclined relative to each other and are inverted V-shape when viewed from above.
4. The novel high-temperature flue gas purification device according to claim 1, characterized in that: A high-temperature ceramic filter dust collector is installed inside the pipe at the outer end of the dust removal detection tube (7).
5. The novel high-temperature flue gas purification device according to claim 1, characterized in that: The inner walls of the mounting frame (13) are symmetrically provided with dovetail grooves, and dovetail blocks adapted to the dovetail grooves are fixed to both sides of the catalyst (12).
6. The novel high-temperature flue gas purification device according to claim 5, characterized in that: Nox sensors and temperature sensors are installed in both the exhaust pipe (4) and the dust detection pipe (7). A data processor is provided on one side of the exhaust pipe (4) and the dust detection pipe (7). The data processor is electrically connected to the Nox sensor and the temperature sensor via a data cable. A control cabinet (8) installed on the ground is provided on one side of the SCR reactor (1).