A device for improving the efficiency of flue gas dry desulfurization

Abstract

The utility model discloses a device that improves flue gas dry desulfurization efficiency relates to ACA technology's desulfurization equipment technical field, include: tubular body and second connecting piece, tubular body integrally connected has injection pipe section, connecting pipe section and first connecting piece, and first connecting piece fixed connection is in the outer periphery of injection pipe section, and injection pipe section is used for inserting in the horizontal pipeline before dust catcher, and is sealed fixed connection through first connecting piece with horizontal pipeline, and the one end of injection pipe section away from connecting pipe section is closed end, and the circumferential pipe wall on injection pipe section is equipped with a plurality of first injection hole, and the end face on closed end is equipped with at least one second injection hole, and the one end of connecting pipe section away from injection pipe section is open end, and second connecting piece sets up in open end to with desulfurizer delivery pipeline is detachably fixed connection, simple structure, convenient to use, effectively reduces the desulfurizer dosage, reduces operation and maintenance cost to satisfy the increasingly strict environmental protection requirement and alleviates enterprise operation burden.

Description

Technical Field

[0001] This utility model relates to the field of desulfurization equipment technology based on ACA technology, and in particular to a device for improving the efficiency of dry flue gas desulfurization. Background Technology

[0002] In the production process of coke ovens and dry quenching coke, sulfur-containing flue gas is generated. Taking calcium-based dry desulfurization technology (“ACA” technology) as an example, the traditional desulfurization process involves directly injecting Ca(OH)2 dry powder with a particle size of 320-400 mesh into a horizontal pipe before the dust collector. The Ca(OH)2 dry powder reacts chemically with the flue gas in the horizontal pipe (SO2 + Ca(OH)2 = CaSO3 + H2O; CaSO3 + 1 / 2O2 = CaSO4). The reaction products and unreacted Ca(OH)2 dry powder enter the bag filter dust collector with the flue gas, adhere to the surface of the filter bags, and continue to react to further remove SO2 from the flue gas. The desulfurization ash after the reaction is collected in the ash silo, and the flue gas after desulfurization and dust removal is pressurized by an induced draft fan and discharged from the chimney.

[0003] In the initial operation, intermittent injection of Ca(OH)2 dry powder was used. Although the hourly average SO2 content in the flue gas occasionally exceeded the standard, it saved on Ca(OH)2 usage, and the daily average met the standard, complying with the policies and standards at the time. However, with increasingly stringent environmental regulations, enterprises must meet the standard for hourly average SO2 content in flue gas to achieve an A-level environmental performance rating. To meet this requirement, a large amount of desulfurizing agent needs to be continuously injected to improve the desulfurization effect, which leads to a significant increase in desulfurization operation and maintenance costs. Therefore, improving the desulfurization reaction efficiency has become an urgent technical problem to be solved. Utility Model Content

[0004] The purpose of this invention is to provide a device that improves the efficiency of dry flue gas desulfurization, thereby solving the problems existing in the prior art. It has a simple structure, is easy to use, effectively reduces the amount of desulfurizing agent used, and lowers operation and maintenance costs, so as to meet increasingly stringent environmental protection requirements and reduce the operational burden on enterprises.

[0005] To achieve the above objectives, this utility model provides the following solution:

[0006] This utility model provides a device for improving the efficiency of dry flue gas desulfurization, comprising: a pipe body and a second connector. The pipe body is integrally connected with an injection pipe section, a connecting pipe section and a first connector. The first connector is fixedly connected to the outer periphery of the injection pipe section. The injection pipe section is used to insert into a horizontal pipe before a dust collector and is sealed and fixedly connected to the horizontal pipe through the first connector. The end of the injection pipe section away from the connecting pipe section is a closed end. A plurality of first injection holes are opened on the circumferential pipe wall of the injection pipe section. At least one second injection hole is opened on the end face of the closed end. The end of the connecting pipe section away from the injection pipe section is an open end. The second connector is disposed at the open end for detachable and fixed connection with the desulfurizing agent conveying pipe.

[0007] Preferably, the plurality of first injection holes are uniformly distributed along the axial and / or circumferential direction of the injection pipe section.

[0008] Preferably, the first injection hole and / or the second injection hole are circular, square, or rectangular in shape.

[0009] Preferably, the first connector includes a first flange, which is fixed to the outer periphery of the injection pipe section and is sealed and fixedly connected to the flange extending from the horizontal pipe.

[0010] Preferably, it also includes a reducer, the larger end of which is integrally connected to the open end, and the smaller end of which is detachably fixedly connected to the desulfurizing agent conveying pipeline.

[0011] Preferably, the second connector includes a second flange, which is fixed to the small end of the reducer and is used for fixed connection with the flange of the desulfurizing agent conveying pipeline.

[0012] Preferably, the diameter of the larger end of the reducer is 100 mm, and the diameter of the smaller end of the reducer is 80 mm.

[0013] Preferably, the length of the injection pipe section extending into the horizontal pipe is 500mm to 1000mm.

[0014] Preferably, the sum of the total opening area of ​​the first injection hole and the opening area of ​​the second injection hole is equal to or greater than the cross-sectional area of ​​the desulfurizing agent delivery pipeline.

[0015] The present invention achieves the following technical advantages over the prior art:

[0016] This invention provides a device for improving the efficiency of dry flue gas desulfurization. By opening multiple first injection holes in the circumferential wall of the injection pipe section and setting at least one second injection hole on the closed end face, the desulfurizing agent can be injected into the horizontal pipe from multiple directions and angles, effectively expanding the contact range between the desulfurizing agent and the flue gas. When the desulfurizing agent enters the connecting pipe section through the desulfurizing agent delivery pipe and is sprayed out through the first and second injection holes of the injection pipe section, the circumferentially distributed first injection holes allow the desulfurizing agent to diffuse evenly across the radial cross-section of the horizontal pipe, while the second injection hole at the closed end sprays the desulfurizing agent forward in the direction of flue gas flow, avoiding the problem of excessively high or low local concentrations caused by traditional single-direction injection, and promoting thorough mixing of the desulfurizing agent and flue gas. At the same time, the pipe body is sealed and fixedly connected to the horizontal pipe through the first connector, ensuring the stability and sealing of the device installation and preventing flue gas leakage; the detachable connection design of the second connector to the desulfurizing agent delivery pipe facilitates the installation, disassembly, and maintenance of the device. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the device for improving the efficiency of dry flue gas desulfurization provided by this utility model;

[0019] Figure 2 A top view of the device for improving the efficiency of dry flue gas desulfurization provided by this utility model;

[0020] Figure 3 A schematic diagram of the structure of the device for improving the efficiency of dry flue gas desulfurization provided by this utility model during use;

[0021] Figure 4 ACA process flow diagram;

[0022] In the diagram: 100. Device for improving the efficiency of dry flue gas desulfurization; 1. Injection pipe section; 2. Connecting pipe section; 3. First connector; 4. Second connector; 5. First injection hole; 6. Second injection hole; 7. Reducer; 8. Horizontal pipe; 9. Desulfurizing agent conveying pipe. Detailed Implementation

[0023] 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.

[0024] The purpose of this invention is to provide a device that improves the efficiency of dry flue gas desulfurization, thereby solving the problems existing in the prior art. It has a simple structure, is easy to use, effectively reduces the amount of desulfurizing agent used, and lowers operation and maintenance costs, so as to meet increasingly stringent environmental protection requirements and reduce the operational burden on enterprises.

[0025] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] This utility model provides a device 100 for improving the efficiency of dry flue gas desulfurization, such as... Figures 1-4 As shown, the device includes: a pipe body and a second connector 4. The pipe body is integrally connected with an injection pipe section 1, a connecting pipe section 2, and a first connector 3. The first connector 3 is fixedly connected to the outer periphery of the injection pipe section 1. The injection pipe section 1 is used to insert into the horizontal pipe 8 before the dust collector and is sealed and fixedly connected to the horizontal pipe 8 through the first connector 3. The end of the injection pipe section 1 away from the connecting pipe section 2 is a closed end. Multiple first injection holes 5 are opened on the circumferential pipe wall of the injection pipe section 1. At least one second injection hole 6 is opened on the end face of the closed end. The end of the connecting pipe section 2 away from the injection pipe section 1 is an open end. The second connector 4 is set at the open end to be detachably fixedly connected to the desulfurizing agent conveying pipe 9. This overall structural design allows the device to be easily connected to the horizontal pipe 8 before the dust collector and the desulfurizing agent conveying pipe 9. The injection pipe section 1 extends deep into the horizontal pipe 8. The arrangement of multiple first injection holes 5 and second injection holes 6 allows the desulfurizing agent to be injected into the horizontal pipe 8 from different positions, resulting in a more uniform distribution of the desulfurizing agent within the pipe and increasing the contact area with the flue gas. This effectively improves the reaction efficiency between the desulfurizing agent and the flue gas, thus enhancing the desulfurization efficiency. Simultaneously, the connecting pipe section 2 is detachably connected to the desulfurizing agent delivery pipe 9 via the second connector 4, facilitating the installation, maintenance, and replacement of the device.

[0027] In a preferred embodiment, a plurality of first injection holes 5 are uniformly distributed along the axial and / or circumferential directions of the injection pipe section 1. This uniform distribution further ensures that the desulfurizing agent is uniformly sprayed from each position after the injection pipe section 1 is inserted into the horizontal pipe 8. This makes the distribution of the desulfurizing agent in the axial and circumferential dimensions within the horizontal pipe 8 more uniform, avoiding situations where the local concentration of desulfurizing agent is too high or too low, thereby comprehensively improving the mixing uniformity with the flue gas and achieving a better desulfurization effect.

[0028] In a preferred embodiment, the first injection hole 5 and / or the second injection hole 6 are circular, square, or rectangular. The different shapes of the first injection hole 5 and / or the second injection hole 6 can adjust the injection pattern of the desulfurizing agent to a certain extent. For example, circular holes provide a more concentrated but moderately dispersed injection; square or rectangular holes may have different coverage areas in specific directions. By selecting injection holes of different shapes, adjustments can be made according to factors such as actual pipe dimensions and flue gas flow conditions to achieve the best desulfurizing agent injection effect and better meet the desulfurization needs of different application scenarios.

[0029] In a preferred embodiment, the first connecting member 3 includes a first flange, which is fixed to the outer periphery of the injection pipe section 1 and is sealed and fixedly connected to the flange extending from the horizontal pipe 8. Using the first flange as the first connecting member 3 and sealingly and fixedly connected to the flange extending from the horizontal pipe 8 ensures the airtightness of the connection between the device and the horizontal pipe 8. This effectively prevents the leakage of high-temperature, high-sulfur flue gas during the desulfurization process, avoiding pollution to the surrounding environment and harm to the health of workers. At the same time, the flange connection structure is simple and stable, facilitating the installation and disassembly of the device and aiding in equipment maintenance and repair.

[0030] In a preferred embodiment, a reducer 7 is also included. The larger end of the reducer 7 is integrally connected to the open end, and the smaller end of the reducer 7 is detachably and fixedly connected to the desulfurizing agent conveying pipeline 9. The reducer 7 serves as a transitional connection between the connecting pipe section 2 and the desulfurizing agent conveying pipeline 9. Different pipe diameters are compatible with different pipe sizes, enabling the device to connect to desulfurizing agent conveying pipelines 9 of different specifications. This improves the versatility and adaptability of the device, facilitates integration with various existing desulfurizing agent conveying systems, and expands the application range of the device.

[0031] In a preferred embodiment, the second connector 4 includes a second flange, which is fixed to the small end of the reducer 7. The second flange is used for a fixed connection with the flange of the desulfurizing agent conveying pipeline 9. The configuration of the second flange provides a stable and reliable connection between the small end of the reducer 7 and the desulfurizing agent conveying pipeline 9. The fixed connection with the flange of the desulfurizing agent conveying pipeline 9 ensures the stability and sealing of the connection between the two, ensuring that the desulfurizing agent will not leak during the conveying process, improving the operational reliability and safety of the entire desulfurization system, and also facilitating installation and disassembly.

[0032] In a preferred embodiment, the diameter of the larger end of the reducer 7 is 100mm, and the diameter of the smaller end is 80mm. This specific reducer diameter design allows for precise matching of the connection requirements between the connecting pipe section 2 and the desulfurizing agent delivery pipe 9. This standard size specification is better compatible with common pipe specifications, further improving the versatility of the device, reducing additional modification costs caused by pipe diameter mismatch, and enabling the device to be more easily applied to various desulfurization projects.

[0033] In a preferred embodiment, the length of the injection pipe section 1 extending into the horizontal pipe 8 is 500mm to 1000mm. Controlling the length of the injection pipe section 1 within this range ensures a suitable desulfurizing agent injection area is formed within the horizontal pipe 8. This length range guarantees sufficient space and distance for the desulfurizing agent to fully mix with the flue gas within the pipe, preventing insufficient mixing due to excessive length and ensuring the airflow stability within the pipe is not affected by excessive length. This satisfies desulfurization requirements without interfering with the normal operation of other systems.

[0034] In a preferred embodiment, the sum of the total opening area of ​​the first injection hole 5 and the opening area of ​​the second injection hole 6 is equal to or greater than the cross-sectional area of ​​the desulfurizing agent conveying pipe 9. This ensures that the desulfurizing agent will not be blocked due to insufficient opening area when entering the horizontal pipe 8. Simultaneously, a larger opening area facilitates the smooth and rapid injection of the desulfurizing agent from the injection pipe section 1 into the horizontal pipe 8, ensuring the injection flow rate and uniformity of the desulfurizing agent, thereby better mixing and reacting with the flue gas and improving desulfurization efficiency.

[0035] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A device for improving the efficiency of dry flue gas desulfurization, characterized in that: include: The pipe body is integrally connected with a spray pipe section, a connecting pipe section, and a first connector. The first connector is fixedly connected to the outer periphery of the spray pipe section. The spray pipe section is used to be inserted into the horizontal pipe before the dust collector and is sealed and fixedly connected to the horizontal pipe through the first connector. The end of the spray pipe section away from the connecting pipe section is a closed end. Multiple first spray holes are opened on the circumferential pipe wall of the spray pipe section. At least one second spray hole is opened on the end face of the closed end. The end of the connecting pipe section away from the spray pipe section is an open end. A second connector is disposed at the open end for detachable and fixed connection with the desulfurizing agent delivery pipeline.

2. The apparatus for improving the efficiency of dry flue gas desulfurization according to claim 1, characterized in that: The plurality of first injection holes are uniformly distributed along the axial and / or circumferential direction of the injection pipe section.

3. The apparatus for improving the efficiency of dry flue gas desulfurization according to claim 2, characterized in that: The first injection hole and / or the second injection hole are circular, square or rectangular in shape.

4. The apparatus for improving the efficiency of dry flue gas desulfurization according to claim 3, characterized in that: The first connector includes a first flange, which is fixed to the outer periphery of the injection pipe section and is sealed and fixedly connected to the flange extending from the horizontal pipe.

5. The apparatus for improving the efficiency of dry flue gas desulfurization according to claim 4, characterized in that: It also includes a reducer, the larger end of which is integrally connected to the open end, and the smaller end of which is detachably and fixedly connected to the desulfurizing agent conveying pipeline.

6. The apparatus for improving the efficiency of dry flue gas desulfurization according to claim 5, characterized in that: The second connector includes a second flange, which is fixed to the small end of the reducer and is used for fixed connection with the flange of the desulfurizing agent conveying pipeline.

7. The apparatus for improving the efficiency of dry flue gas desulfurization according to claim 6, characterized in that: The diameter of the larger end of the reducer is 100mm, and the diameter of the smaller end of the reducer is 80mm.

8. The apparatus for improving the efficiency of dry flue gas desulfurization according to claim 1, characterized in that: The length of the injection pipe section extending into the horizontal pipe is 500mm to 1000mm.

9. The apparatus for improving the efficiency of dry flue gas desulfurization according to claim 8, characterized in that: The sum of the total opening area of ​​the first injection hole and the opening area of ​​the second injection hole is equal to or greater than the cross-sectional area of ​​the desulfurizing agent delivery pipeline.

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