Efficient catalytic oxidation flue gas deep desulfurization device

Abstract

The utility model provides an efficient catalytic oxidation flue gas deep desulfurization device which comprises a desulfurization box, a sealing cover arranged on one side of the desulfurization box, a water pump fixedly installed on the surface of the desulfurization box, a water inlet of the water pump fixedly communicated with a solution box, hollow conveying frames arrayed in an air guide cover at equal intervals, and nozzles arrayed at the bottoms of the hollow conveying frames at equal intervals. The hollow conveying frame fixedly communicates with a water outlet of the water pump through a conveying pipe. The solution box is arranged, an efficient catalytic oxidizing agent solution in the solution box is pumped into the conveying pipe through the water pump, conveyed into the hollow conveying frame through the conveying pipe and sprayed out from the spray head to fully react with flue gas in the desulfurization box, the contact area between the atomized solution and the flue gas is increased, the treatment effect is improved, and use is convenient. Flue gas enters from the gas inlet pipe, is sucked into the desulfurization box under the action of the fan, and is discharged from the gas outlet pipe after being subjected to catalytic reaction through a solution in the desulfurization box and the catalytic plate, so that the purification effect on the flue gas is improved.

Description

Technical Field

[0001] This utility model relates to the field of deep flue gas desulfurization technology, specifically to a high-efficiency catalytic oxidation deep flue gas desulfurization device. Background Technology

[0002] With the rapid development of industrialization, the problem of flue gas emissions has become increasingly serious, especially the pollutants such as sulfur oxides in flue gas, which pose a serious threat to the environment and human health. At present, flue gas desulfurization technology mainly includes wet desulfurization, dry desulfurization, semi-dry desulfurization and catalytic oxidation desulfurization. Among them, catalytic oxidation desulfurization technology has become a research hotspot in recent years due to its high desulfurization efficiency potential and low risk of secondary pollution. However, existing catalytic oxidation flue gas desulfurization devices still have many problems that need to be solved: (1) Insufficient gas-liquid contact, the catalyst solution is mostly sprayed directly, and the contact area with the flue gas is limited, resulting in low catalytic oxidation reaction efficiency and difficulty in achieving deep desulfurization; (2) Low utilization rate of catalyst solution, most devices lack an effective solution recovery and circulation structure, resulting in catalyst waste and increased processing costs; (3) Insufficient flue gas pretreatment, the particulate impurities contained in the flue gas are easy to adhere to the surface of the catalytic components, block the pores and reduce catalytic activity; (4) The selection and layout of catalysts in some devices are unreasonable, resulting in harsh reaction conditions and poor stability.

[0003] For example, the Chinese invention patent with publication number CN101940870B (patent name: a device for removing sulfur dioxide from flue gas) has a technical solution that includes a desulfurization tower, an oxidation device, a demisting mechanism and a desulfurization device. The inner cavity of the desulfurization tower is divided into a front cavity (including a concentration zone and a desulfurization zone) and a rear cavity by a partition. An absorbent atomizing device is set at the flue gas inlet to concentrate the sulfate solution using the heat of the flue gas, while removing sulfur dioxide and producing ammonium sulfate as a byproduct. However, the technical solution disclosed in this patent still has obvious defects: First, the desulfurization device uses a single absorbent spray device. Although a liquid redistributor is set up, the contact form between flue gas and absorbent is relatively traditional, with limited atomization effect, short gas-liquid contact time, and insufficient contact area, resulting in insufficient catalytic oxidation reaction and difficulty in meeting the requirements of deep desulfurization. Second, no dedicated flue gas pretreatment filtration module is set up. Particulate impurities in the flue gas directly enter the concentration zone and desulfurization zone, easily adhering to the surface of the spray device and liquid redistributor, causing blockage and reducing the efficiency of subsequent reactions, affecting the long-term stable operation of the equipment. Third, the catalytic reaction design focuses on chemical absorption through absorbent (ammonia, etc.), without using high-efficiency catalytic oxidants and dedicated catalytic components. The catalytic activity of the desulfurization reaction is insufficient, and the removal effect on low-concentration sulfur oxides is limited. Fourth, the internal structure of the device is complex, with many chambers in the desulfurization tower and fixed installation of components. Subsequent cleaning, maintenance, and replacement of catalyst-related components are cumbersome and have high maintenance costs. Fifth, there is a lack of targeted solution recovery and circulation optimization design. The recycling rate of absorbent needs to be improved, which increases the processing cost to some extent.

[0004] Other existing related technologies also generally suffer from similar problems, failing to simultaneously achieve optimal gas-liquid contact performance, catalyst utilization, pretreatment functionality, and ease of maintenance. Therefore, developing a highly efficient catalytic oxidation flue gas deep desulfurization device that optimizes gas-liquid contact performance, improves catalyst utilization, possesses pretreatment functionality, and has a simple structure has significant practical application value.

[0005] Therefore, in order to improve flue gas desulfurization efficiency, reduce treatment costs, and reduce secondary pollution, this application proposes a high-efficiency catalytic oxidation flue gas deep desulfurization device. Utility Model Content

[0006] This invention aims to address the problems mentioned in the background art by providing a highly efficient catalytic oxidation deep desulfurization device for flue gas. This device, through optimized design of the desulfurization and filtration components, achieves effective filtration, catalytic oxidation, and deep desulfurization of flue gas, improving the purification effect and reducing pollutant emissions. Furthermore, the device utilizes a nano-catalyst solution, further enhancing the efficiency and stability of the catalytic oxidation reaction, providing new ideas and methods for the development of flue gas desulfurization technology.

[0007] The specific technical solution is as follows:

[0008] A high-efficiency catalytic oxidation deep desulfurization device for flue gas includes: a desulfurization box, a sealing cover provided on one side of the desulfurization box, an inlet pipe and an outlet pipe respectively provided on the surface of the desulfurization box, a catalytic plate slidably connected inside the desulfurization box, and a desulfurization assembly provided inside the desulfurization box;

[0009] The desulfurization assembly includes an air guide hood, which is fixedly connected to the upper part of the desulfurization chamber. A fan is fixedly installed on the top of the air guide hood. A solution tank containing a high-efficiency catalytic oxidant is fixedly installed in the lower part of the desulfurization chamber. A water pump is fixedly installed on the surface of the desulfurization chamber. The water pump inlet is fixedly connected to the solution tank. Hollow conveyor frames are arranged in an equidistant array inside the air guide hood. Spray nozzles are arranged in an equidistant array at the bottom of the hollow conveyor frames. The hollow conveyor frames are fixedly connected to the water pump outlet through a conveying pipe.

[0010] The above-mentioned high-efficiency catalytic oxidation flue gas deep desulfurization device includes a collection plate fixedly connected inside the desulfurization box, a collection port on the surface of the collection plate, and the collection port being fixedly connected to the solution tank.

[0011] The above-mentioned high-efficiency catalytic oxidation flue gas deep desulfurization device includes: a filter assembly installed inside the desulfurization box; the filter assembly includes a filter box fixedly installed at the bottom of the desulfurization box; a baffle is fixedly connected inside the filter box; a filter plate is inserted into the surface of the baffle; an air supply pipe is fixedly connected to the filter box; and the air inlet pipe is fixedly connected to the filter box.

[0012] The aforementioned high-efficiency catalytic oxidation flue gas deep desulfurization device includes: a hollow air guide frame fixedly connected to one end of the air supply pipe; air outlets arranged equidistantly on the top of the hollow air guide frame; fixed rods symmetrically arranged on the top of the air outlets; and water baffles fixedly connected to the top of the fixed rods.

[0013] The aforementioned high-efficiency catalytic oxidation flue gas deep desulfurization device is provided with one-way valves on both the inlet pipe and the outlet pipe, and the outlet pipe is located directly above the air guide hood.

[0014] In the above-mentioned high-efficiency catalytic oxidation flue gas deep desulfurization device, the air guide hood is arranged in a trapezoidal shape, the hollow air guide frame is arranged parallel to the air guide hood, and the water baffle is arranged in a conical shape.

[0015] The above-mentioned high-efficiency catalytic oxidation flue gas deep desulfurization device, wherein: the above-mentioned...

[0016] This utility model has the following beneficial effects:

[0017] A solution tank is installed, and a water pump draws the high-efficiency catalytic oxidant solution from the tank into a delivery pipe. This solution is then conveyed through the pipe into a hollow conveyor frame and sprayed out from nozzles. It reacts fully with the flue gas in the desulfurization chamber, and the atomized solution increases the contact area with the flue gas, improving treatment efficiency and ease of use. Flue gas enters through the inlet pipe and is drawn into the desulfurization chamber by a fan. After undergoing a catalytic reaction with the solution and catalytic plates within the chamber, it is discharged from the outlet pipe, enhancing the purification effect on the flue gas. Attached Figure Description

[0018] Figure 1 A schematic diagram of the structure of the high-efficiency catalytic oxidation flue gas deep desulfurization device provided in the embodiments of this utility model;

[0019] Figure 2 A schematic diagram of the structure of the filter assembly of the high-efficiency catalytic oxidation flue gas deep desulfurization device provided in this embodiment of the utility model;

[0020] Figure 3 A schematic diagram of the hollow air guide frame of the high-efficiency catalytic oxidation flue gas deep desulfurization device provided in this embodiment of the utility model;

[0021] Figure 4 This is a schematic diagram of the desulfurization component in the high-efficiency catalytic oxidation flue gas deep desulfurization device provided in this embodiment of the utility model.

[0022] Attached Figure

[0023] 1. Desulfurization box; 2. Sealing cover; 3. Inlet pipe; 4. Outlet pipe; 5. Desulfurization assembly; 501. Air guide hood; 502. Fan; 503. Solution tank; 504. Water pump; 505. Conveying pipe; 506. Hollow conveyor frame; 507. Nozzle; 508. Collection plate; 509. Collection port; 6. Filter assembly; 601. Filter box; 602. Baffle; 603. Filter plate; 604. Air supply pipe; 605. Hollow air guide frame; 606. Air outlet; 607. Fixing rod; 608. Water baffle; 7. Catalytic plate. Detailed Implementation

[0024] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0025] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of this utility model, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0026] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "inner," and "outer" 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 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, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0027] In the description of this utility model, unless otherwise explicitly specified and limited, the term "connection" or similar designation indicating the connection relationship between components should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example

[0028] This embodiment provides a high-efficiency catalytic oxidation flue gas deep desulfurization device, such as... Figures 1-4 As shown, it includes: a desulfurization box 1, a sealing cover 2 on one side of the desulfurization box 1, an inlet pipe 3 and an outlet pipe 4 respectively on the surface of the desulfurization box 1, a catalytic plate 7 slidably connected inside the desulfurization box 1, and a desulfurization assembly 5 inside the desulfurization box 1.

[0029] The desulfurization assembly 5 includes an air guide hood 501, which is fixedly connected to the upper part of the desulfurization box 1. A fan 502 is fixedly installed on the top of the air guide hood 501. A solution tank 503 containing a high-efficiency catalytic oxidant is fixedly installed in the lower part of the desulfurization box 1. A water pump 504 is fixedly installed on the surface of the desulfurization box 1. The inlet of the water pump 504 is fixedly connected to the solution tank 503. Hollow conveyor frames 506 are arranged in an equidistant array inside the air guide hood 501. Spray nozzles 507 are arranged in an equidistant array at the bottom of the hollow conveyor frames 506. The hollow conveyor frames 506 and the outlet of the water pump 504 are fixedly connected through a conveying pipe 505.

[0030] A high-efficiency catalytic oxidation deep desulfurization device for flue gas employing the above-mentioned technical solution is equipped with a solution tank 503. A water pump 504 draws the high-efficiency catalytic oxidant solution from the solution tank 503 into a conveying pipe 505, which then sends it into a hollow conveying frame 506. The solution is then sprayed out from nozzles 507, allowing it to fully react with the flue gas in the desulfurization chamber 1. The atomized solution increases the contact area with the flue gas, improving the treatment effect and facilitating operation. Flue gas enters through the inlet pipe 3 and is drawn into the desulfurization chamber 1 by the fan 502. After catalytic reaction with the solution and catalytic plate 7 in the desulfurization chamber 1, the flue gas is discharged from the outlet pipe 4, enhancing the purification effect on the flue gas.

[0031] In order to collect and reuse the solution, a collection plate 508 is fixedly connected inside the desulfurization tank 1. A collection port 509 is opened on the surface of the collection plate 508, and the collection port 509 is fixedly connected to the solution tank 503.

[0032] To filter particulate impurities in the flue gas, a filter assembly 6 is installed inside the desulfurization chamber 1. The filter assembly 6 includes a filter box 601 fixedly installed at the bottom of the desulfurization chamber 1, a baffle 602 fixedly connected inside the filter box 601, a filter plate 603 inserted into the surface of the baffle 602, and an air supply pipe 604 fixedly connected to the filter box 601. The air inlet pipe 3 is fixedly connected to the filter box 601. The flue gas enters the filter box 601 through the air inlet pipe 3 and passes through the filter plate 603 to filter impurities in the flue gas, preventing particulate impurities from clogging the catalytic plate 7 and affecting the catalytic effect.

[0033] To ensure sufficient contact and reaction between the solution in the solution tank 503 and the flue gas, a hollow air guide frame 605 is fixedly connected to one end of the air supply duct 604. Air outlets 606 are evenly spaced on the top of the hollow air guide frame 605, and fixing rods 607 are symmetrically arranged on the top of each air outlet 606. Water-blocking blocks 608 are fixedly connected to the top of each fixing rod 607. The flue gas is discharged from the air outlets 606 and reacts with the solution sprayed from the nozzles 507 to perform desulfurization treatment.

[0034] To prevent backflow of flue gas, one-way valves are installed on both the inlet pipe 3 and the outlet pipe 4, with the outlet pipe 4 located directly above the air guide hood 501.

[0035] To better collect the flue gas, the air guide hood 501 is trapezoidal, the hollow air guide frame 605 is parallel to the air guide hood 501, and the water baffle 608 is conical. The water baffle 608 is installed to prevent the solution from falling into the air supply duct 604.

[0036] To prevent flue gas leakage and improve the catalytic oxidation desulfurization effect of flue gas, an observation window is provided on the surface of the sealing cover 2, and a sealing strip is provided at the connection between the sealing cover 2 and the desulfurization box 1.

[0037] In summary, the high-efficiency catalytic oxidation flue gas deep desulfurization device provided in this embodiment has the following advantages: A solution tank 503 is provided, and a water pump 504 draws the high-efficiency catalytic oxidant solution from the solution tank 503 into a conveying pipe 505. The solution is then conveyed through the conveying pipe 505 into a hollow conveying frame 506 and sprayed out from the nozzle 507, allowing for a thorough reaction with the flue gas in the desulfurization box 1. The atomized solution increases the contact area with the flue gas, improving the treatment effect and facilitating use. Flue gas enters through the inlet pipe 3 and is drawn into the desulfurization box 1 by the fan 502. After catalytic reaction with the solution and catalytic plate 7 in the desulfurization box 1, the flue gas is discharged from the outlet pipe 4, improving the purification effect on the flue gas.

[0038] In operation, flue gas enters the filter box 601 through the inlet pipe 3 and is filtered by the filter plate 603 to remove particulate impurities. The filtered flue gas then enters the collection plate 508. The water pump 504 is activated, drawing the high-efficiency catalytic oxidant solution from the solution tank 503 into the delivery pipe 505. The solution is then sent to the hollow conveyor frame 506 and sprayed out from the nozzle 507, where it reacts fully with the flue gas in the desulfurization box 1. The atomized solution increases the contact area with the flue gas, improving the treatment effect. The catalytic plate 7 further catalyzes and oxidizes the flue gas, resulting in deep desulfurization.

[0039] The above workflow mainly consists of the following steps:

[0040] Flue gas entry and filtration:

[0041] The flue gas first enters the desulfurization unit through the inlet pipe 3.

[0042] The flue gas enters the filter box 601 and is filtered by the filter plate 603 to remove particulate impurities, thus preventing impurities from clogging subsequent components and affecting the catalytic effect.

[0043] Flue gas guidance and solution spraying:

[0044] The filtered flue gas enters the desulfurization box 1 and is collected by the space above the collection plate 508.

[0045] Fan 502 starts, drawing flue gas into the desulfurization box 1 and guiding it upward.

[0046] At the same time, water pump 504 starts working, drawing the high-efficiency catalytic oxidant solution in solution tank 503 into delivery pipe 505.

[0047] The solution is fed into the hollow conveyor frame 506 through the conveying pipe 505 and sprayed out in an atomized form through the nozzle 507, so as to fully contact and react with the flue gas.

[0048] Catalytic oxidation and deep desulfurization:

[0049] The sprayed atomized solution mixes with the flue gas in the desulfurization box 1. The highly efficient catalytic oxidant solution reacts chemically with pollutants such as sulfur oxides in the flue gas to achieve desulfurization.

[0050] Catalytic plate 7 further catalytically oxidizes the flue gas, improving desulfurization efficiency and achieving deep desulfurization.

[0051] Smoke exhaust:

[0052] The flue gas, after undergoing catalytic oxidation and deep desulfurization treatment, is discharged from the exhaust pipe 4 directly above the air guide hood 501.

[0053] A one-way valve is installed on the exhaust pipe 4 to prevent backflow of flue gas.

[0054] Solution recovery and reuse:

[0055] The solution and unreacted catalyst generated during the desulfurization process are collected through the collection port 509 on the surface of the collection plate 508 and flow back into the solution tank 503 for recycling.

[0056] Observation and maintenance:

[0057] The sealing cover 2 is equipped with an observation window to facilitate observation of the working conditions inside the desulfurization box 1.

[0058] A sealing strip is provided at the connection between the sealing cover 2 and the desulfurization box 1 to ensure the airtightness of the device and prevent flue gas leakage.

[0059] Through the above-described workflow, this high-efficiency catalytic oxidation flue gas deep desulfurization device can effectively filter, catalytically oxidize, and deeply desulfurize flue gas, thereby improving the purification effect of flue gas and reducing pollutant emissions.

[0060] Among them, the high-efficiency catalytic oxidant solution adopts a nano-catalyst solution: the catalyst solution prepared by nanotechnology has a higher specific surface area and catalytic activity, and can realize catalytic oxidation reaction at a lower temperature.

[0061] The above are merely preferred embodiments of the present utility model and are not intended to limit the implementation methods and protection scope of the present utility model. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-efficiency catalytic oxidation flue gas deep desulfurization device, characterized in that, It includes a desulfurization box (1), a sealing cover (2) is provided on one side of the desulfurization box (1), an air inlet pipe (3) and an air outlet pipe (4) are respectively provided on the surface of the desulfurization box (1), a catalytic plate (7) is slidably connected inside the desulfurization box (1), and a desulfurization component (5) is provided inside the desulfurization box (1). The desulfurization assembly (5) includes an air guide hood (501), which is fixedly connected to the upper part of the desulfurization box (1). A fan (502) is fixedly installed on the top of the air guide hood (501). A solution tank (503) containing a high-efficiency catalytic oxidant is fixedly installed in the lower part of the desulfurization box (1). A water pump (504) is fixedly installed on the surface of the desulfurization box (1). The inlet of the water pump (504) is fixedly connected to the solution tank (503). Hollow conveyor frames (506) are arranged equidistantly inside the air guide hood (501). Spray nozzles (507) are arranged equidistantly at the bottom of the hollow conveyor frames (506). The hollow conveyor frames (506) are fixedly connected to the outlet of the water pump (504) through a conveying pipe (505). The desulfurization box (1) is equipped with a filter assembly (6), which includes a filter box (601) fixedly installed at the bottom of the desulfurization box (1). A baffle (602) is fixedly connected inside the filter box (601), and a filter plate (603) is inserted into the surface of the baffle (602). An air supply pipe (604) is fixedly connected to the filter box (601), and the air inlet pipe (3) is fixedly connected to the filter box (601). One end of the air supply pipe (604) is fixedly connected to a hollow air guide frame (605). The top of the wind frame (605) has air outlets (606) arranged at equal intervals. The top of the air outlets (606) is symmetrically provided with fixing rods (607), and the top of the fixing rods (607) is fixedly connected with water baffles (608). One-way valves are provided on both the air inlet pipe (3) and the air outlet pipe (4). The air outlet pipe (4) is located directly above the air guide hood (501). The air guide hood (501) is trapezoidal. The hollow air guide frame (605) is parallel to the air guide hood (501). The water baffles (608) are conical.

2. The high-efficiency catalytic oxidation flue gas deep desulfurization device according to claim 1, characterized in that, A collection plate (508) is fixedly connected inside the desulfurization box (1). A collection port (509) is opened on the surface of the collection plate (508), and the collection port (509) is fixedly connected to the solution tank (503).

3. The high-efficiency catalytic oxidation flue gas deep desulfurization device according to claim 2, characterized in that, The sealing cover (2) is provided with an observation window on its surface, and a sealing strip is provided at the connection between the sealing cover (2) and the desulfurization box (1).

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