Flue gas denitration device for garbage incineration power generation
By setting a combined structure of spiral channels and straight channels on the catalyst carrier, and combining the rotating shaft to drive the disturbance plate and impeller, the contact time between the flue gas and the catalyst is extended, which solves the problem of low flue gas reaction efficiency in the existing technology and achieves a high-efficiency flue gas denitrification effect.
Patent Information
- Application Number
- CN202422498704.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-16
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2034-10-16
AI Technical Summary
The channels of existing honeycomb catalyst carriers are relatively short, resulting in short contact time between flue gas and catalyst and low reaction efficiency.
The catalyst carrier structure adopts a combination of spiral channels and straight channels, combined with a rotating shaft to drive the disturbance plate, which prolongs the contact time between the flue gas and the catalyst, and mixes the flue gas through the impeller and the disturbance plate to improve the reaction efficiency.
The reaction efficiency between flue gas and catalyst is improved, ensuring the full reduction of nitrogen monoxide and nitrogen dioxide in the flue gas, and improving the denitrification effect.
Smart Images
Figure CN223351409U_ABST
Abstract
Description
Technical Field
[0001] The present disclosure belongs to the technical field of flue gas treatment, and in particular relates to a flue gas denitrification device for waste incineration power generation. Background Art
[0002] A large amount of flue gas will be generated during the incineration process of garbage, and the flue gas will contain a large amount of nitric oxide and nitrogen dioxide. Nitric oxide and nitrogen dioxide are atmospheric pollutants that cannot be discharged directly, so the flue gas needs to be denitrified. The common denitrification method in the existing technology is to use ammonia to reduce nitric oxide and nitrogen dioxide. The reduction of nitric oxide and nitrogen dioxide by ammonia requires a catalyst, and the catalyst is attached to the catalyst carrier.
[0003] However, the channels in the honeycomb-shaped catalyst carrier are mostly straight channels, and the channels are relatively short. When the exhaust gas flows through the channels, it passes through the channels very quickly, and sometimes the exhaust gas cannot fully react with the catalyst on the inner wall of the catalyst carrier channel. Utility Model Content
[0004] In view of the shortcomings of the existing technology, the purpose of the present disclosure is to provide a flue gas denitrification device for power generation by burning garbage, which improves the reaction efficiency between the flue gas and the catalyst layer attached to the catalyst carrier when the flue gas passes through the catalyst carrier.
[0005] The purpose of this disclosure can be achieved through the following technical solutions:
[0006] The flue gas denitrification device for burning garbage for power generation is characterized by comprising:
[0007] A catalyst carrier, the catalyst carrier comprising a first catalyst and a second catalyst, wherein a catalyst connecting tube is fixedly connected between the first catalyst and the second catalyst;
[0008] The first catalyst has a plurality of spiral channels connected at both ends, and the second catalyst has a plurality of straight channels connected at both ends.
[0009] A rotating shaft passes through the first catalyst and the second catalyst and is rotationally connected to the first catalyst and the second catalyst. At least one disturbance plate is fixedly connected to the rotating shaft located inside the catalyst connecting cylinder.
[0010] The above technical solution, its principle and technical effects:
[0011] The flue gas enters the spiral channel from one end of the first catalyst. Since the spiral channel is spirally arranged, the length of the channel is increased, and the contact time between the flue gas and the catalyst is further increased. At the same time, the rotating shaft drives the disturbance plate to rotate. When the flue gas enters the catalyst connecting tube, the flue gas is mixed. After the flue gas that has not fully reacted is mixed, the flue gas enters the straight channel inside the second catalyst and further contacts the catalyst, so that the flue gas can fully react.
[0012] Furthermore, an impeller is fixedly connected to the end of the rotating shaft close to the first catalyst.
[0013] Furthermore, it also includes a smoke exhaust cylinder, and the first catalyst, the second catalyst and the catalyst connecting cylinder are all fixedly connected to the inside of the smoke exhaust cylinder.
[0014] Furthermore, connecting rings are rotatably connected to both ends of the rotating shaft, and a fixing rod is fixedly connected to the circumference of the connecting ring, and the fixing rod is fixedly connected to the inner wall of the smoke exhaust pipe.
[0015] Furthermore, a first connecting hole connected at both ends is opened inside the first catalyst along its axis, and a second connecting hole connected at both ends is opened inside the second catalyst along its axis. The rotating shaft passes through the first connecting hole and the second connecting hole and is rotatably connected to the first connecting hole and the second connecting hole.
[0016] Furthermore, an end surface of the impeller away from the first catalyst protrudes outwards in a cone shape.
[0017] Furthermore, a catalyst layer is attached to the inner wall of the spiral channel on the first catalyst, the inner wall of the straight channel on the second catalyst, and the inner wall of the catalyst connecting tube.
[0018] The nouns, conjunctions or adjectives involved in the above technical solution are explained as follows:
[0019] A fixed connection is a connection in which parts or components are fixed without any relative movement. There are two types of connections: detachable and non-detachable.
[0020] (1) Removable connections use screws, splines, wedge pins, etc. to hold parts together. This type of connection allows for disassembly during maintenance without damaging the parts. However, the connectors used must be of the correct specifications (e.g., length of bolts, keys, wedge pins) and properly tightened.
[0021] (2) Non-detachable connections mainly refer to welding, riveting, and tenoning. Since they require forging, sawing, or oxygen cutting to disassemble during repair or replacement, spare parts generally cannot be reused. At the same time, when making connections, attention should be paid to workmanship quality, technical inspection, and remedial measures (such as calibration, polishing, etc.).
[0022] A threaded connection refers to a detachable connection in which the connected parts are connected together using threaded parts (or the threaded part of the connected parts).
[0023] A sliding connection is when two objects are in contact but not fixed and can slide relative to each other.
[0024] A rotational connection is a connection between parts that allows the parts to rotate relative to each other.
[0025] Beneficial effects of the present disclosure:
[0026] When the flue gas passes through the catalyst carrier, the reaction efficiency between the flue gas and the catalyst layer attached to the catalyst carrier is improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.
[0028] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present disclosure;
[0029] Figure 2 Schematic diagram of the connection structure between the catalyst carrier and the rotating shaft according to an embodiment of the present disclosure;
[0030] Figure 3 It is a schematic diagram of the internal structure of the catalyst carrier of the embodiment of the present disclosure. DETAILED DESCRIPTION
[0031] The following will be combined with the accompanying drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the embodiments described are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present disclosure.
[0032] In the description of the present disclosure, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present disclosure.
[0033] According to the concept of this application, Figures 1 to 3 The following describes an embodiment of a flue gas denitrification device for power generation by incineration of garbage. Specifically, the flue gas denitrification device for power generation by incineration of garbage is constructed as a split structure, which has components such as a catalyst carrier 1 and a rotating shaft 2. Through the mutual cooperation of the first catalyst 11, the second catalyst 12, the disturbance plate 21 and other structures, the flue gas enters the spiral channel 111 from one end of the first catalyst 11. Since the spiral channel 111 is a spiral arrangement, the length of the channel is increased, and the contact time between the flue gas and the catalyst is further increased. At the same time, the rotating shaft 2 drives the disturbance plate 21 to rotate under the drive. When the flue gas enters the catalyst connecting tube 13, the flue gas is mixed. After the flue gas that has not fully reacted is mixed, the flue gas enters the straight channel 121 inside the second catalyst 12 to further contact the catalyst, so that the flue gas fully reacts.
[0034] like Figure 1-3 As shown, the flue gas denitrification device for burning garbage for power generation includes:
[0035] The catalyst carrier 1 includes a first catalyst 11 and a second catalyst 12, and a catalyst connecting tube 13 is fixedly connected between the first catalyst 11 and the second catalyst 12;
[0036] The first catalyst 11 has a plurality of spiral channels 111 connected at both ends, and the second catalyst 12 has a plurality of straight channels 121 connected at both ends.
[0037] The rotating shaft 2 passes through the first catalyst 11 and the second catalyst 12 and is rotatably connected to the first catalyst 11 and the second catalyst 12 . At least one disturbance plate 21 is fixedly connected to the rotating shaft 2 located inside the catalyst connecting cylinder 13 .
[0038] During use, the flue gas enters the spiral channel 111 from one end of the first catalyst 11. Since the spiral channel 111 is spirally arranged, the length of the channel is increased, and the contact time between the flue gas and the catalyst is further increased. At the same time, the rotating shaft 2 drives the disturbance plate 21 to rotate. When the flue gas enters the catalyst connecting tube 13, the flue gas is mixed. After the flue gas that has not fully reacted is mixed, the flue gas enters the straight channel 121 inside the second catalyst 12 and further contacts the catalyst, so that the flue gas can fully react.
[0039] A catalyst support, also known as a carrier, is a component of a supported catalyst. It serves as the framework for the active components of the catalyst, supporting and dispersing them while also increasing the strength of the catalyst. However, the support itself generally does not possess catalytic activity. Most supports are products from the catalyst industry, with commonly used ones including alumina, silica gel, activated carbon, and certain natural products such as pumice and diatomaceous earth. The formula "active component name - carrier name" is often used to indicate the composition of a supported catalyst, such as nickel-alumina catalysts for hydrogenation and vanadium oxide-diatomaceous earth catalysts for oxidation.
[0040] A catalyst generally refers to a substance that increases the reaction rate without changing the overall standard Gibbs free energy of the reaction. It can also be described as a substance that increases the reaction rate without altering the chemical equilibrium, and whose mass and chemical properties remain unchanged before and after the reaction. According to statistics, catalysts are used in over 90% of industrial processes, such as those in the chemical, petrochemical, biochemical, and environmental protection sectors. There are many types of catalysts, which can be categorized as liquid or solid based on their state, and as homogeneous or heterogeneous based on the phase of the reaction system. Homogeneous catalysts include acids, bases, soluble transition metal compounds, and peroxide catalysts. Catalysts play a vital role in the modern chemical industry. For example, iron catalysts are used in the production of synthetic ammonia, vanadium catalysts are used in the production of sulfuric acid, and different catalysts are used in the polymerization of ethylene and the production of three major synthetic materials, rubber, from butadiene.
[0041] In one embodiment of the present invention, an impeller 22 is fixedly connected to the end of the rotating shaft 2 near the first catalyst 11. When the flowing flue gas passes through the impeller 22, the impeller 22 rotates, thereby driving the rotating shaft 2 and the disturbance plate 21 to rotate.
[0042] In one embodiment of the present invention, the invention further comprises a smoke exhaust pipe 3, wherein the first catalyst 11, the second catalyst 12 and the catalyst connecting pipe 13 are all fixedly connected to the inside of the smoke exhaust pipe 3. The smoke exhaust channel guides the flow of smoke.
[0043] In one embodiment of the present invention, connecting rings 23 are rotatably connected at both ends of the rotating shaft 2. A fixing rod 24 is fixedly connected to the circumference of the connecting ring 23. The fixing rod 24 is fixedly connected to the inner wall of the smoke exhaust pipe 3. This supports the rotating shaft 2 to facilitate rotation while preventing excessive pressure from being generated between the rotating shaft 2 and the first catalyst 11 and the second catalyst 12.
[0044] In one embodiment of the present invention, a first connection hole 112 connected at both ends is opened inside the first catalyst 11 along its axis, and a second connection hole 122 connected at both ends is opened inside the second catalyst 12 along its axis. The rotating shaft 2 passes through the first connection hole 112 and the second connection hole 122, and is rotatably connected to the first connection hole 112 and the second connection hole 122.
[0045] In one embodiment of the present invention, the end surface of the impeller 22 away from the first catalyst 11 protrudes outward in a cone shape to play a role in guiding flow.
[0046] In one embodiment of the present invention, catalyst layers are attached to the inner wall of the spiral channel 111 on the first catalyst 11, the inner wall of the straight channel 121 on the second catalyst 12, and the inner wall of the catalyst connecting tube 13. The catalyst layers can help ammonia reduce nitrogen monoxide and nitrogen dioxide.
[0047] The following is a further description of the waste incineration power generation flue gas denitrification device provided by the present invention in conjunction with the accompanying drawings and implementation methods.
[0048] Waste incineration power generation flue gas denitrification device, including:
[0049] The catalyst carrier 1 includes a first catalyst 11 and a second catalyst 12, and a catalyst connecting tube 13 is fixedly connected between the first catalyst 11 and the second catalyst 12;
[0050] The first catalyst 11 has a plurality of spiral channels 111 connected at both ends, and the second catalyst 12 has a plurality of straight channels 121 connected at both ends.
[0051] The rotating shaft 2 passes through the first catalyst 11 and the second catalyst 12 and is rotatably connected to the first catalyst 11 and the second catalyst 12 . At least one disturbance plate 21 is fixedly connected to the rotating shaft 2 located inside the catalyst connecting cylinder 13 .
[0052] An impeller 22 is fixedly connected to the end of the rotating shaft 2 close to the first catalyst 11 .
[0053] It also includes a smoke exhaust pipe 3 , and the first catalyst 11 , the second catalyst 12 and the catalyst connecting pipe 13 are all fixedly connected inside the smoke exhaust pipe 3 .
[0054] The two ends of the rotating shaft 2 are rotatably connected with connecting rings 23 , and the circumference of the connecting ring 23 is fixedly connected with a fixing rod 24 , and the fixing rod 24 is fixedly connected to the inner wall of the smoke exhaust pipe 3 .
[0055] A first connecting hole 112 connected at both ends is opened inside the first catalyst 11 along its axis, and a second connecting hole 122 connected at both ends is opened inside the second catalyst 12 along its axis. The rotating shaft 2 passes through the first connecting hole 112 and the second connecting hole 122 and is rotatably connected to the first connecting hole 112 and the second connecting hole 122.
[0056] The end surface of the impeller 22 away from the first catalyst 11 protrudes outward in a cone shape.
[0057] Catalyst layers are attached to the inner wall of the spiral channel 111 on the first catalyst 11 , the inner wall of the straight channel 121 on the second catalyst 12 , and the inner wall of the catalyst connecting tube 13 .
[0058] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
[0059] The above shows and describes the basic principles, main features and advantages of the present disclosure. Those skilled in the art should understand that the present disclosure is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present disclosure. Various changes and improvements may be made to the present disclosure without departing from the spirit and scope of the present disclosure, and such changes and improvements shall fall within the scope of the present disclosure.
Claims
1. A flue gas denitrification device for waste incineration power generation, characterized in that: include: A catalyst carrier (1), the catalyst carrier (1) comprising a first catalyst (11) and a second catalyst (12), wherein a catalyst connecting tube (13) is fixedly connected between the first catalyst (11) and the second catalyst (12); The first catalyst (11) has a plurality of spiral channels (111) connected at both ends, and the second catalyst (12) has a plurality of straight channels (121) connected at both ends. A rotating shaft (2) passes through the first catalyst (11) and the second catalyst (12) and is rotatably connected to the first catalyst (11) and the second catalyst (12); at least one disturbance plate (21) is fixedly connected to the rotating shaft (2) located inside the catalyst connecting cylinder (13).
2. The flue gas denitrification device for waste incineration power generation according to claim 1, characterized in that: An impeller (22) is fixedly connected to the end of the rotating shaft (2) close to the first catalyst (11).
3. The flue gas denitrification device for waste incineration power generation according to claim 1, characterized in that: It also includes a smoke exhaust cylinder (3), wherein the first catalyst (11), the second catalyst (12), and the catalyst connecting cylinder (13) are all fixedly connected inside the smoke exhaust cylinder (3).
4. The flue gas denitrification device for waste incineration power generation according to claim 3, characterized in that: Both ends of the rotating shaft (2) are rotatably connected to connecting rings (23), and a fixing rod (24) is fixedly connected to the circumference of the connecting ring (23), and the fixing rod (24) is fixedly connected to the inner wall of the smoke exhaust pipe (3).
5. The flue gas denitrification device for waste incineration power generation according to claim 1, characterized in that: A first connecting hole (112) connected at both ends is provided inside the first catalyst (11) along its axis, and a second connecting hole (122) connected at both ends is provided inside the second catalyst (12) along its axis. The rotating shaft (2) passes through the first connecting hole (112) and the second connecting hole (122), and is rotatably connected to the first connecting hole (112) and the second connecting hole (122).
6. The flue gas denitrification device for waste incineration power generation according to claim 2, characterized in that: The end surface of the impeller (22) away from the first catalyst (11) protrudes outward in a cone shape.
7. The flue gas denitrification device for waste incineration power generation according to claim 1, characterized in that: Catalyst layers are attached to the inner wall of the spiral channel (111) on the first catalyst (11), the inner wall of the straight channel (121) on the second catalyst (12), and the inner wall of the catalyst connecting tube (13).