A hot blast stove flue gas denitrification and desulfurization device

Abstract

This utility model discloses a denitrification and desulfurization device for hot blast stove flue gas, belonging to the field of flue gas denitrification and desulfurization devices. The device includes a slurry tank, with a flue gas conveying pipe at the upper end of the slurry tank. A fixing block is installed at the end of the flue gas conveying pipe away from the slurry tank. It also includes a connecting block, located above the fixing block. A tower shell is installed above the connecting block, with a flue gas outlet at the upper end of the tower shell. This utility model solves the problem that existing desulfurization and denitrification devices mainly emit water vapor into the air. However, this water vapor has a high water molecule content, and when it comes into contact with cold outside air, the water molecules condense into droplets, falling back into the denitrification and desulfurization device and depositing at the bottom. While conventional desulfurization towers use plate demisters installed on the inner wall for demisting using physical properties, this method cannot completely remove all water molecules from the air.

Description

Technical Field

[0001] This utility model relates to the field of flue gas denitrification and desulfurization devices, specifically a hot blast stove flue gas denitrification and desulfurization device. Background Technology

[0002] Hot blast stoves typically use coal as fuel, which generates a large amount of flue gas during operation. This flue gas contains significant amounts of sulfur dioxide and nitrogen oxides, and direct emission of this gas into the atmosphere will pollute the air. In today's society with increasingly stringent environmental requirements, environmental protection is particularly important for manufacturing enterprises, as it is a crucial factor for sustainable production and development. Therefore, the flue gas generated during the combustion process of hot blast stoves must be treated before being released into the atmosphere.

[0003] Chinese Patent Publication No. CN204816202U discloses a desulfurization and denitrification device for a spray tower hot air furnace. The device includes a spray tower, a chemical tank, a controller, a water pump, and a spray gun. The spray gun is mounted on the outer wall of the spray tower, with its nozzle pointing into the furnace chamber. The chemical tank is connected to the inlet of the water pump via a pipeline, and the outlet of the water pump is connected to the spray gun via a pipeline. The water pump and spray gun are connected to the controller. The chemical tank is filled with chemical solution. This invention uses the spray gun to spray chemical solution into the furnace chamber of the spray tower to desulfurize and denitrify the flue gas generated during combustion, removing sulfur dioxide and nitrogen oxides from the flue gas, ensuring that the water vapor emitted into the air meets national emission standards, thus exhibiting good environmental performance.

[0004] The desulfurization and denitrification devices mentioned above mainly emit water vapor into the air. However, the water vapor has a high water molecule content. When the water vapor comes into contact with the cold outside air, the water molecules will merge into droplets and fall back into the desulfurization and denitrification device, where they will settle at the bottom. In contrast, desulfurization towers typically use plate demisters installed on the inner wall to remove mist using physical properties, but this method cannot completely remove all water molecules from the air. Summary of the Invention

[0005] The purpose of this utility model is to provide a hot air furnace flue gas denitrification and desulfurization device. By opening a flue gas outlet at the upper end of the tower shell and installing multiple hot air blowers at corresponding positions on the tower shell and tower body, the hot air blowers start working when the tower shell and tower body begin to discharge water vapor. After the water vapor has passed through the demister in the desulfurization tower, the hot air blowers not only blow out hot air to heat and dry the discharged flue gas, but also disrupt the normal upward movement of the flue gas, causing the flue gas to move rapidly and its trajectory to become disordered. This causes the water molecules in the flue gas to disperse in all directions, and even if they encounter air condensation droplets, they will not fall back into the desulfurization tower, thus solving the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a hot blast stove flue gas denitrification and desulfurization device, including a slurry tank, a flue gas conveying pipe at the upper end of the slurry tank, a fixing block at the end of the flue gas conveying pipe away from the slurry tank, and a connecting block, the connecting block being disposed at the upper end of the fixing block, a tower shell and tower body being disposed at the upper end of the connecting block, a flue gas outlet being opened at the upper end of the tower shell and tower body, and a hot air blower being disposed at the end of the tower shell and tower body near the flue gas outlet.

[0007] Preferably, a storage bin is provided at the lower end of the outer surface of the slurry tank, and the storage bin is bolted to the slurry tank.

[0008] Preferably, the storage silo is provided with a first infusion pipe, which is bolted to the storage silo.

[0009] Preferably, a slurry circulation pump is installed at the end of the first infusion pipe away from the storage silo, and the slurry circulation pump is connected to the flange of the first infusion pipe.

[0010] Preferably, the slurry circulation pump is provided with a second infusion pipe at the end away from the first infusion pipe, and the second infusion pipe is connected to the slurry pool at the end away from the slurry circulation pump.

[0011] Preferably, an observation window is provided on the outer surface of the slurry tank.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] This invention features a flue gas outlet at the top of the tower shell, with multiple hot air blowers positioned corresponding to the outlet. When the tower shell begins to discharge water vapor, and the water vapor has already passed the demister inside the desulfurization tower, the hot air blowers not only heat and dry the discharged flue gas but also disrupt its normal upward movement, causing it to move rapidly and erratically. This disperses water molecules within the flue gas, preventing them from condensing and falling back into the desulfurization tower. This effectively avoids the problem of existing desulfurization and denitrification devices primarily emitting water vapor into the air, which has a high water molecule content. When the water vapor comes into contact with cold outside air, the water molecules condense into droplets and fall back into the desulfurization and denitrification device, settling at the bottom. While conventional desulfurization towers use plate demisters on the inner wall for demisting based on physical properties, this method cannot completely remove all water molecules from the air. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall external structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the overall main structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the overall right-side structure of this utility model;

[0017] Figure 4 This is a top view schematic diagram of the overall structure of this utility model.

[0018] In the diagram: 1. Slurry tank; 2. Smoke conveying pipe; 3. Storage silo; 4. First liquid conveying pipe; 5. Fixed base; 6. Slurry circulation pump; 7. Second liquid conveying pipe; 8. Observation window; 9. Fixing block; 10. Anti-tipping support; 11. Connecting block; 12. Tower shell and tower body; 13. Smoke outlet; 14. Hot air blower. Detailed Implementation

[0019] 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.

[0020] To address the issue that existing technologies primarily release water vapor into the air from desulfurization and denitrification devices, which has a high water molecule content, causing water molecules to clump together upon contact with cold outside air and fall back into the desulfurization and denitrification device, depositing at the bottom, and while conventional desulfurization towers use plate demisters on their inner walls for demisting based on physical properties, this approach cannot completely remove all water molecules from the air, this embodiment provides the following technical solution:

[0021] A hot blast furnace flue gas denitrification and desulfurization device includes a slurry tank 1, a flue gas conveying pipe 2 at the upper end of the slurry tank 1, a fixing block 9 at the end of the flue gas conveying pipe 2 away from the slurry tank 1, and a connecting block 11 above the fixing block 9. A tower shell 12 is provided above the connecting block 11, and a flue gas outlet 13 is opened at the upper end of the tower shell 12. A hot air blower 14 is provided at the end of the tower shell 12 near the flue gas outlet 13. A storage bin 3 is provided at the lower end of the outer surface of the slurry tank 1. The storage silo 3 is bolted to the slurry tank 1. A first liquid delivery pipe 4 is installed on the storage silo 3. The first liquid delivery pipe 4 is bolted to the storage silo 3. A slurry circulation pump 6 is installed at the end of the first liquid delivery pipe 4 away from the storage silo 3. The slurry circulation pump 6 is flanged to the first liquid delivery pipe 4. A second liquid delivery pipe 7 is installed at the end of the slurry circulation pump 6 away from the first liquid delivery pipe 4. The end of the second liquid delivery pipe 7 away from the slurry circulation pump 6 is connected to the slurry tank 1. An observation window 8 is provided on the outer surface of the slurry tank 1.

[0022] In this embodiment, please refer to Figures 1-4A flue gas outlet 13 is provided at the upper end of the tower shell 12, and multiple hot air blowers 14 are provided at the corresponding positions of the flue gas outlet 13 on the tower shell 12. When the tower shell 12 starts to discharge water vapor, and when the water vapor has passed through the demister in the desulfurization tower, the hot air blower 14 starts to work. It not only blows out hot air to heat and dry the discharged flue gas, but also disrupts the normal upward movement of the flue gas, so that the flue gas moves quickly and its trajectory is disordered, causing the water molecules in the flue gas to drift in all directions. Even if they encounter air and condense into droplets, they will not fall back into the desulfurization tower.

[0023] Working principle: The slurry tank 1 is equipped with a storage bin 3, a first delivery pipe 4, a second delivery pipe 7, and a slurry circulation pump 6. The desulfurizing agent is stored and extracted from the bottom of the slurry tank 1 and circulated to the top of the slurry tank 1 by the slurry circulation pump 6 for re-spraying. A flue gas outlet 13 is opened at the upper end of the tower shell 12. Multiple hot air blowers 14 are installed at the corresponding positions of the flue gas outlet 13 on the tower shell 12. When the tower shell 12 starts to discharge water vapor, and when the water vapor has passed through the demister in the desulfurization tower, the hot air blowers 14 start to work. They not only blow out hot air to heat and dry the discharged flue gas, but also disrupt the normal upward movement of the flue gas, causing the flue gas to move quickly and its trajectory to be disordered. This causes the water molecules in the flue gas to drift in all directions, so that even if they encounter air and condense into droplets, they will not fall back into the desulfurization tower.

[0024] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hot air furnace flue gas denitrification and desulfurization device, comprising a slurry tank (1), wherein a flue gas conveying pipe (2) is provided at the upper end of the slurry tank (1), and a fixing block (9) is provided at the end of the flue gas conveying pipe (2) away from the slurry tank (1); characterized in that It also includes a connecting block (11), which is located on the upper end of the fixed block (9). A tower shell (12) is provided on the upper end of the connecting block (11). A smoke outlet (13) is provided on the upper end of the tower shell (12). A hot air blower (14) is provided on the end of the tower shell (12) near the smoke outlet (13).

2. The device according to claim 1, characterized in that: A storage bin (3) is provided at the lower end of the outer surface of the slurry tank (1), and the storage bin (3) is bolted to the slurry tank (1).

3. The device according to claim 2, characterized in that: The storage bin (3) is provided with a first infusion pipe (4), which is bolted to the storage bin (3).

4. The flue gas denitration and desulfurization device of a hot blast stove according to claim 3, characterized in that: The first infusion pipe (4) is equipped with a slurry circulation pump (6) at one end away from the storage bin (3), and the slurry circulation pump (6) is connected to the flange of the first infusion pipe (4).

5. The device according to claim 4, characterized in that: The slurry circulation pump (6) has a second delivery pipe (7) at one end away from the first delivery pipe (4), and the second delivery pipe (7) is connected to the slurry tank (1) at the other end away from the slurry circulation pump (6).

6. The device according to claim 1, characterized in that: An observation window (8) is provided on the outer surface of the slurry tank (1).

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