Flue gas denitration device based on active component flue gas denitration catalyst

Abstract

The utility model discloses a flue gas denitration device based on an active component flue gas denitration catalyst, which comprises a bottom plate, one end of the upper surface of the bottom plate is respectively provided with a flue gas denitration box and a filter box, two sides of the filter box are respectively communicated with a connecting pipe and a gas delivery pipe, and the other end of the gas delivery pipe is communicated with one end of the flue gas denitration box. An empty hole is formed in the lower surface in the filter box, a replacement assembly is detachably mounted in the empty hole, and a reducing agent pipe is inserted into one end of the flue gas denitration box. Through the design of the hydraulic cylinder, the mounting frame and the sealing plate, the hydraulic cylinder pushes the bearing plate to ascend, the bearing plate is attached to the lower surface of the mounting frame, bolts inserted into the mounting frame are taken down, the mounting frame is separated from the filter box, and the hydraulic cylinder drives the mounting frame to descend, so that a worker can conveniently disassemble, assemble and clean the replacement assembly; the filtering effect cannot be reduced, and the effect of the active component denitration catalyst cannot be damaged.

Description

Technical Field

[0001] This utility model belongs to the field of flue gas denitrification technology, specifically relating to a flue gas denitrification device based on an active component flue gas denitrification catalyst. Background Technology

[0002] Active component flue gas denitrification catalysts are widely used in flue gas denitrification projects in industries such as power, steel, chemicals, and cement. These industries generate large amounts of nitrogen oxides during production, causing serious environmental pollution. By using denitrification catalysts, nitrogen oxide emissions can be effectively reduced, protecting the environment and achieving sustainable development. With the acceleration of industrialization and the continuous increase in energy consumption, air pollution problems are becoming increasingly serious. Among them, nitrogen oxides (NOx), as one of the major air pollutants, cause great harm to the environment and human health. NOx not only forms acid rain and chemical smog, which harm the environment, but also has adverse effects on the human respiratory system. In order to effectively control NOx emissions in the atmosphere, governments around the world have introduced strict environmental protection policies and emission standards.

[0003] Currently, Chinese patent CN210544397U discloses a flue gas denitrification device, including a base. A pretreatment box and a denitrification tower are installed on the upper end of the base. An air inlet is connected to the left side of the pretreatment box. A coarse filter and a fine filter are fixedly installed inside the pretreatment box from left to right. Air nozzles are installed on the upper end of the pretreatment box, to the left of both the coarse and fine filters. The right side of the pretreatment box is connected to the upper end of the denitrification tower via a connecting pipe. A rectifier plate is installed at the upper end of the denitrification tower. This invention first filters large particulate matter in the flue gas to prevent large particulate matter from eroding and clogging the catalyst plate and activated carbon filter plate. The filtered flue gas then enters the denitrification tower for denitrification treatment. Finally, it is discharged after the activated carbon filter plate adsorbs odors and toxic gases. The catalyst plate and activated carbon filter plate are inserted between the bosses, which facilitates the disassembly and replacement of the catalyst plate and activated carbon filter plate.

[0004] Although the above technical solutions have solved the corresponding technical problems, they still have the following drawbacks:

[0005] The cleaning effect of the jet nozzle in the above technical solution is limited, and there may be cases of incomplete cleaning, which may lead to the accumulation and blockage of impurities in some areas, affecting the filtration effect. If the filtration effect is poor, the quality of the flue gas entering the denitrification stage will decrease, which will greatly reduce the effect of the active component denitrification catalyst. Utility Model Content

[0006] To address the aforementioned technical problems, the purpose of this invention is to provide a flue gas denitrification device based on an active component flue gas denitrification catalyst. This addresses the technical shortcomings mentioned above, such as the limited cleaning effect of the jet nozzle, the possibility of incomplete cleaning, the accumulation and blockage of impurities in some areas, the impact on filtration, and the fact that poor filtration leads to a decrease in the quality of flue gas entering the denitrification stage, which significantly diminishes the effectiveness of the active component denitrification catalyst.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a flue gas denitrification device based on an active component flue gas denitrification catalyst, comprising a base plate, a flue gas denitrification box and a filter box respectively provided on one end of the upper surface of the base plate, a connecting pipe and a gas supply pipe respectively connected to both sides of the filter box, wherein the other end of the gas supply pipe is connected to one end of the flue gas denitrification box, a hole is provided on the lower surface inside the filter box, a replacement component is disassembled and installed in the hole, a reducing agent pipe is inserted through one end of the flue gas denitrification box, a plurality of nozzles are connected to one end of the reducing agent pipe, the plurality of nozzles are located inside the flue gas denitrification box, a connecting frame is fixedly installed on both sides of the filter box, and a guide slope is provided at each of the four corners of the inner wall of the filter box.

[0008] As a further embodiment of this utility model, a honeycomb carrier is provided at the lower end of the flue gas denitrification box. The honeycomb carrier forms a support carrier for the active component flue gas denitrification catalyst. The honeycomb carrier has a regular honeycomb structure and is provided with a number of uniformly distributed pores that can provide attachment sites for the active components. The honeycomb carrier is made of ceramic material.

[0009] As a further preferred embodiment of this utility model, two sets of air blowing pipes are connected and installed on the upper end of the inner wall of the flue gas denitrification box. A fan is connected to one end of the upper surface of the air blowing pipe by a disassembly bolt, and the air outlet of the fan is aligned with the inside of the air blowing pipe.

[0010] As a preferred embodiment of this utility model, the replacement component includes a hydraulic cylinder and a mounting frame. The hydraulic cylinder is located at the lower center of the filter box, and a support plate is fixedly connected to the extended end of the hydraulic cylinder.

[0011] As a further embodiment of this utility model, the mounting frame is disassembled and installed at one end of the lower surface inside the filter box, and both sides of the mounting frame are inserted into the connecting frame and fixed by bolts inserted into the surface of the connecting frame.

[0012] As a further embodiment of this utility model, a sealing plate is fixedly installed on one end of the upper surface inside the mounting frame, and the sealing plate is tightly fitted with the hole provided on the lower surface of the filter box. A flue gas filter screen is fixedly installed on one end of the upper surface of the sealing plate.

[0013] Compared with existing technologies, the flue gas denitrification device based on an active component flue gas denitrification catalyst provided by this utility model has the following beneficial effects:

[0014] 1. Through the design of the flue gas denitrification box, filter box, and guide slope, during flue gas denitrification, the incoming flue gas is treated and filtered by the replacement components in the filter box to prevent impurities in the flue gas from interfering with the denitrification process or causing wear on the honeycomb carrier. The guide slope guides the flue gas to flow smoothly in the filter box, reducing airflow resistance, preventing flue gas from accumulating in the filter box, and improving filtration efficiency. Then, the incoming flue gas is sprayed through the reducing agent pipe in the flue gas denitrification box, so that the reducing agent and nitrogen oxides can fully contact each other and undergo a selective catalytic reduction reaction. Afterwards, the fan blows air into the air duct, and the resulting wind speed and air volume help to promote the mixing of flue gas and reducing agent. The fan also helps to guide the reacted flue gas to the honeycomb carrier. The honeycomb carrier provides support for the active components. When the reduced flue gas comes into contact with the honeycomb carrier, the small amount of residual nitrogen oxides can continue to undergo the denitrification reaction under the action of the active components, ensuring more thorough denitrification and preventing the active component denitrification catalyst from reducing its effectiveness due to filtration problems.

[0015] 2. Through the design of hydraulic cylinders, mounting frames, and sealing plates, the hydraulic cylinder pushes the support plate upward, and the support plate fits against the lower surface of the mounting frame. The bolts connecting the mounting frame are removed, and the mounting frame is separated from the filter box. The hydraulic cylinder then drives the mounting frame to descend, allowing workers to easily disassemble and clean the replacement components, ensuring that the filtration effect does not decrease. Furthermore, the sealing plate ensures the airtightness of the filter box, preventing flue gas from leaking from the connection between the mounting frame and the filter box. This allows workers to effectively clean the flue gas filter screen, ensuring that the efficiency of flue gas filtration will not be affected in the later stages, and preserving the function of the active component denitrification catalyst. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only examples of embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the flue gas denitrification device based on the active component flue gas denitrification catalyst of this utility model embodiment;

[0018] Figure 2 This is a schematic diagram of the honeycomb catalyst structure according to an embodiment of the present invention;

[0019] Figure 3This is a schematic diagram of the fan structure according to an embodiment of the present utility model;

[0020] Figure 4 This is a schematic diagram of the guide slope structure according to an embodiment of the present utility model;

[0021] Figure 5 This is a schematic diagram of the replacement component structure according to an embodiment of the present utility model.

[0022] Figure label:

[0023] 1. Base plate; 2. Flue gas denitrification box; 3. Air blowing pipe; 4. Reducing agent pipe; 5. Filter box; 51. Connecting pipe; 52. Guide slope; 53. Connecting frame; 6. Replacement component; 7. Gas delivery pipe; 8. Honeycomb carrier; 9. Fan; 10. Disassembly bolts; 601. Hydraulic cylinder; 602. Bearing plate; 603. Mounting frame; 604. Flue gas filter screen; 605. Sealing plate. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0025] In the description of the embodiments of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0026] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, an integral connection, or a detachable connection; they can refer to the internal connection of two components; they can refer to a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of this utility model can be understood according to the specific circumstances.

[0027] See appendix Figure 1 To be continued Figure 5As shown, a flue gas denitrification device based on an active component flue gas denitrification catalyst includes a base plate 1. A flue gas denitrification chamber 2 and a filter chamber 5 are respectively mounted on one end of the upper surface of the base plate 1. A connecting pipe 51 and a gas supply pipe 7 are respectively connected to both sides of the filter chamber 5, with the other end of the gas supply pipe 7 connected to one end of the flue gas denitrification chamber 2. The lower surface of the filter chamber 5 has a perforation, within which a replacement component 6 is installed. A reducing agent pipe 4 is inserted into one end of the flue gas denitrification chamber 2, and multiple sets of nozzles are connected to one end of the reducing agent pipe 4. These nozzles are located inside the flue gas denitrification chamber 2. Connecting frames 53 are fixedly installed on both sides of the filter chamber 5, and guide slopes 52 are provided at the four corners of the inner wall of the filter chamber 5. A honeycomb carrier 8 is provided at the lower end of the flue gas denitrification chamber 2. The honeycomb carrier 8 forms a support carrier for the active component flue gas denitrification catalyst. The honeycomb carrier 8 has a regular honeycomb structure with several evenly distributed pores that provide attachment sites for the active component. The honeycomb carrier 8 is made of ceramic material. Two sets of air blowing pipes 3 are connected and installed on the upper end of the inner wall of the flue gas denitrification box 2. One end of the upper surface of the air blowing pipe 3 is connected to a fan 9 by a disassembly bolt 10, and the air outlet of the fan 9 is aligned with the inside of the air blowing pipe 3.

[0028] The design of the flue gas denitrification box 2, filter box 5, and guide slope 52 ensures that during flue gas denitrification, the incoming flue gas is treated and filtered by the replacement component 6 inside the filter box 5 to prevent impurities in the flue gas from interfering with the denitrification process or causing wear to the honeycomb carrier 8. The guide slope 52 guides the flue gas to flow smoothly within the filter box 5, reducing airflow resistance, preventing flue gas from accumulating in the filter box 5, and improving filtration efficiency. Finally, the incoming flue gas is sprayed through the reducing agent pipe 4 inside the flue gas denitrification box 2, ensuring full contact between the reducing agent and nitrogen oxides. A selective catalytic reduction reaction occurs, and then the fan 9 blows air into the air duct 3. The resulting air speed and volume help promote the mixing of flue gas and reducing agent. The fan 9 also helps guide the reacted flue gas to the honeycomb carrier 8. The honeycomb carrier 8 provides support for the active components. When the reduced flue gas comes into contact with the honeycomb carrier 8, the small amount of residual nitrogen oxides can continue to undergo denitrification reaction under the action of the active components, ensuring more thorough denitrification and preventing the denitrification catalyst from experiencing a decrease in effectiveness due to filtration problems.

[0029] See appendix Figure 2 -Appendix Figure 5As shown, the replacement component 6 includes a hydraulic cylinder 601 and a mounting frame 603. The hydraulic cylinder 601 is located at the lower center inside the filter box 5, and a support plate 602 is fixedly connected to the extended end of the hydraulic cylinder 601. The mounting frame 603 is disassembled and installed on one end of the lower surface inside the filter box 5. Both sides of the mounting frame 603 are inserted into the connecting frame 53 and fixed by bolts inserted into the surface of the connecting frame 53. A sealing plate 605 is fixedly installed on one end of the upper surface inside the mounting frame 603, and the sealing plate 605 fits tightly with the hole provided on the lower surface of the filter box 5. A flue gas filter screen 604 is fixedly installed on one end of the upper surface of the sealing plate 605.

[0030] The design incorporates a hydraulic cylinder 601, a mounting frame 603, and a sealing plate 605. The hydraulic cylinder 601 pushes the support plate 602 upwards, which then adheres to the lower surface of the mounting frame 603. The bolts connecting the mounting frame 603 are removed, separating the mounting frame 603 from the filter box 5. The hydraulic cylinder 601 then lowers the mounting frame 603, allowing workers to easily disassemble and clean the replacement component 6, ensuring the filtration effect remains consistent. The sealing plate 605 maintains the airtightness of the filter box 5, preventing gas leakage from the connection between the mounting frame 603 and the filter box 5. This allows workers to effectively clean the flue gas filter screen 604, ensuring that the efficiency of subsequent flue gas filtration is not affected and that the function of the active denitrification catalyst is not compromised.

[0031] Working principle: The flue gas to be denitrified is transported through the connecting pipe 51. The flue gas enters the filter box 5 through the connecting pipe 51 and is filtered by the flue gas filter screen 604 installed in the filter box 5. The filtered flue gas then enters the flue gas denitrification box 2. The reducing agent is then transported into the flue gas denitrification box 2 through the reducing agent pipe 4 inserted at one end of the flue gas denitrification box 2. The honeycomb carrier 8 at the lower end of the inside of the flue gas denitrification box 2 provides attachment sites for the active components. The active components on the honeycomb carrier 8 work together with the injected reducing agent to denitrify the nitrogen oxides in the flue gas. Two sets of... Under the action of fan 9, air is introduced into the air duct 3. The air outlet of fan 9 is directed into the air duct 3. The airflow in the air duct 3 helps to promote the denitrification reaction and improve the denitrification efficiency. When it is necessary to clean the flue gas filter 604, the support plate 602 is pushed up by hydraulic cylinder 601. The support plate 602 is attached to the lower surface of the mounting frame 603. The bolts of the mounting frame 603 are removed, and the mounting frame 603 is separated from the filter box 5. The mounting frame 603 is driven down by hydraulic cylinder 601, which makes it convenient for the staff to clean the replacement component 6 and avoid the filter problems from affecting the active catalyst.

[0032] In summary, the working principle and flue gas denitrification principle of this flue gas denitrification device based on an active component flue gas denitrification catalyst are as follows:

[0033] Working principle of flue gas denitrification device

[0034] Flue gas introduction and filtration:

[0035] The flue gas is first introduced into the filter box 5 through the connecting pipe 51.

[0036] Inside the filter box 5, the flue gas is initially filtered by replacing the flue gas filter 604 in the component 6 to remove large particles and impurities, preventing these impurities from interfering with the subsequent denitrification process or causing wear to the honeycomb carrier 8.

[0037] The design of the guide slope 52 ensures that the flue gas flows smoothly in the filter box 5, reducing airflow resistance and improving filtration efficiency.

[0038] Flue gas denitrification treatment:

[0039] The filtered flue gas enters flue gas denitrification chamber 2.

[0040] Inside the flue gas denitrification chamber 2, a reducing agent (such as ammonia, urea, etc.) is sprayed in through the reducing agent pipe 4, so that the reducing agent comes into full contact with the nitrogen oxides (such as NOx) in the flue gas.

[0041] The honeycomb carrier 8 serves as a support for the active component flue gas denitrification catalyst. Its regular honeycomb structure provides a large number of attachment sites, enabling the active components to be evenly distributed and function efficiently.

[0042] The active components and reducing agents work together to selectively catalytically reduce nitrogen oxides in flue gas (SCR), converting them into harmless nitrogen and water vapor.

[0043] Enhance denitrification efficiency:

[0044] The two sets of air blowing pipes 3 at the upper end of the inner wall of the flue gas denitrification box 2 introduce external air under the action of the fan 9, forming a certain wind speed and air volume.

[0045] These airflows not only promote the mixing of flue gas and reducing agent and improve the contact efficiency between reducing agent and nitrogen oxides, but also help guide the reacted flue gas to the honeycomb carrier 8, so that the remaining small amount of nitrogen oxides can continue to react under the action of active components, ensuring more thorough denitrification.

[0046] Maintenance and cleaning:

[0047] When it is necessary to replace or clean the flue gas filter 604, the mounting frame 603 can be easily separated from the filter box 5 by driving the hydraulic cylinder 601, making it convenient for staff to carry out cleaning or replacement work.

[0048] The design of the sealing plate 605 ensures the airtightness of the filter box 5 during cleaning or replacement, preventing flue gas leakage.

[0049] Summary of Flue Gas Denitrification Principles

[0050] The core principle of flue gas denitrification is to utilize an active component, the flue gas denitrification catalyst, to enable a selective catalytic reduction (SCR) reaction between a reducing agent (such as ammonia) and nitrogen oxides (such as NOx) in the flue gas under appropriate temperature and catalytic action. This reaction converts harmful nitrogen oxides into harmless nitrogen and water vapor, thereby purifying the flue gas. This device, through its rational structural design, including a filtration system, a denitrification system, and an enhancement system, ensures the high efficiency and stability of the denitrification process, while also facilitating maintenance and cleaning, thus extending the equipment's service life.

[0051] The above description illustrates the basic principles of the present invention. The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The above embodiments and descriptions in the specification are only for illustrating the principles of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and scope of the present invention without departing from the scope of the present invention should be included within the protection scope of the present invention.

Claims

1. A flue gas denitrification device based on an active component flue gas denitrification catalyst, characterized in that: The system includes a base plate (1), on one end of the upper surface of the base plate (1) are respectively provided a flue gas denitrification box (2) and a filter box (5). The filter box (5) is connected to a connecting pipe (51) and a gas supply pipe (7) on both sides. The other end of the gas supply pipe (7) is connected to one end of the flue gas denitrification box (2). The lower surface of the filter box (5) is provided with a hole. A replacement component (6) is installed in the hole. A reducing agent pipe (4) is inserted through one end of the flue gas denitrification box (2). Multiple sets of nozzles are connected to one end of the reducing agent pipe (4). The multiple sets of nozzles are located inside the flue gas denitrification box (2). A connecting frame (53) is fixedly installed on both sides of the filter box (5). A guide slope (52) is provided at each of the four corners of the inner wall of the filter box (5).

2. The flue gas denitrification device based on an active component flue gas denitrification catalyst according to claim 1, characterized in that: The lower end of the flue gas denitrification box (2) is provided with a honeycomb carrier (8), which forms a support carrier for the active component flue gas denitrification catalyst. The honeycomb carrier (8) has a regular honeycomb structure and has a number of uniformly distributed pores that can provide attachment sites for the active components. The honeycomb carrier (8) is made of ceramic material.

3. The flue gas denitrification device based on an active component flue gas denitrification catalyst according to claim 1, characterized in that: The upper end of the inner wall of the flue gas denitrification box (2) is connected to two sets of air blowing pipes (3). One end of the upper surface of the air blowing pipe (3) is connected to a fan (9) by a disassembly bolt (10). The air outlet of the fan (9) is aligned with the inside of the air blowing pipe (3).

4. The flue gas denitrification device based on an active component flue gas denitrification catalyst according to claim 1, characterized in that: The replacement component (6) includes a hydraulic cylinder (601) and a mounting frame (603). The hydraulic cylinder (601) is located at the lower center of the filter box (5), and a support plate (602) is fixedly connected to the extended end of the hydraulic cylinder (601).

5. A flue gas denitrification device based on an active component flue gas denitrification catalyst according to claim 4, characterized in that: The mounting frame (603) is disassembled and installed at one end of the lower surface inside the filter box (5). Both sides of the mounting frame (603) are inserted into the connecting frame (53) and fixed by bolts inserted into the surface of the connecting frame (53).

6. The flue gas denitrification device based on an active component flue gas denitrification catalyst according to claim 5, characterized in that: A sealing plate (605) is fixedly installed on one end of the upper surface inside the mounting frame (603), and the sealing plate (605) fits tightly with the hole provided on the lower surface of the filter box (5). A flue gas filter (604) is fixedly installed on one end of the upper surface of the sealing plate (605).

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