Carbon black drying tail gas treatment device

Abstract

The utility model discloses a kind of carbon black drying tail gas treatment devices, it is related to tail gas processing field, including preheater, the heat exchange medium import of preheater is connected with high-temperature flue gas pipeline, the gas outlet of preheater is connected with denitration system, the heat exchange medium import of waste heat boiler is connected with the gas outlet of denitration system, the heat exchange medium export of waste heat boiler is connected with desulfurization tower, the gas outlet of desulfurization tower is sequentially connected with dust collector, chimney;Denitration system includes denitration tower, multiple catalyst layers are equipped in denitration tower, denitration tower is equipped with denitrification agent spraying mechanism above each catalyst layer, multiple baffles are equipped on the inner wall of denitration tower;Gas distribution plate is equipped below denitration tower, multiple hollow bosses are equipped in gas distribution plate, multiple hollow bosses are all connected with air inlet pipe, multiple first gas outlets are equipped on the side wall of hollow boss;Multiple second gas outlets are equipped on the side wall and top of gas distribution plate. The device can effectively remove pollutants in tail gas, and the waste heat in processing process can be utilized, and energy consumption is reduced.

Description

Technical Field

[0001] This utility model relates to carbon black production equipment, specifically to a carbon black drying tail gas treatment device. Background Technology

[0002] Carbon black is an amorphous carbon that exists as a lightweight, loose, extremely fine black powder with a very large specific surface area. It is widely used in the manufacture of Chinese ink, inks, paints, and as a reinforcing agent for rubber.

[0003] Currently, traditional carbon black drying processes mainly include the following methods: 1. Using clean fuels such as oil or gas to burn in a combustion furnace, the resulting high-temperature gas is directly used to dry the carbon black material; or directly using electricity to heat the carbon black slurry, causing it to dry and take shape. 2. Using coal as fuel, the hot air generated by combustion is used to dry the slurry. Both of these methods generate certain amounts of exhaust gas during the drying process. This exhaust gas contains a large amount of pollutants such as nitrogen oxides and sulfur oxides, posing a significant threat to the environment and human health. Therefore, how to effectively treat the exhaust gas generated during the drying process is a problem that needs to be solved by those skilled in the art. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a carbon black drying exhaust gas treatment device to address the shortcomings of the existing technology. This device can effectively remove pollutants from the exhaust gas, and the waste heat in the treatment process can be utilized, thereby reducing energy consumption.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0006] A carbon black drying tail gas treatment device includes a preheater connected to a drying tail gas pipeline. The heat exchange medium inlet of the preheater is connected to a high-temperature flue gas pipeline, and the outlet of the preheater is connected to a denitrification system. The outlet of the denitrification system is connected to the heat exchange medium inlet of a waste heat boiler. The heat exchange medium outlet of the waste heat boiler is connected to a desulfurization tower via a first fan. The outlet of the desulfurization tower is connected to a dust collector and a chimney in sequence via a second fan. The denitrification system includes a denitrification tower with multiple catalyst layers inside. A denitrification agent spraying mechanism is provided above each catalyst layer inside the denitrification tower. Multiple baffles are provided on the inner wall of the denitrification tower. A gas distribution plate is provided below the denitrification tower. Multiple hollow protrusions are provided inside the gas distribution plate, and each hollow protrusion is connected to a first air inlet pipe. Multiple first air outlets are provided on the side walls of the hollow protrusions. Multiple second air outlets are provided on the side walls and top of the gas distribution plate.

[0007] Preferably, multiple baffles are staggered on the heat exchange channel and the inner wall of the preheater, and the surface of the baffles is provided with multiple guide grooves.

[0008] Preferably, multiple baffles are arranged at a downward angle.

[0009] Preferably, the denitrification agent spraying mechanism includes a first spray pipe, and the inner wall of the denitrification tower is provided with a plurality of first nozzles, all of which are connected to the first spray pipe.

[0010] Preferably, the desulfurization tower includes a tower body, and a desulfurizing agent spraying mechanism is provided on the upper part of the tower body. The desulfurizing agent spraying mechanism includes a second spray pipe, which is connected to multiple spray branch pipes. Multiple second nozzles are provided on each of the multiple spray branch pipes, and rotatable swirl blades are provided at the liquid outlet of the second nozzle.

[0011] Preferably, a support rod is fixedly provided at the liquid outlet of the second nozzle, and the swirl blade is movably sleeved on the support rod.

[0012] Preferably, both the denitrification tower and the desulfurization tower are equipped with demisters at the top.

[0013] Preferably, the lower part of the desulfurization tower is provided with an air inlet mechanism, which includes a second air inlet pipe and an air outlet plate communicating with the second air inlet pipe, wherein the second air inlet pipe is spiral-shaped.

[0014] Preferably, the inner wall of the second air intake pipe is provided with multiple guide plates.

[0015] Preferably, the air outlet plate is connected to multiple tree-shaped air outlet pipes, and the tree-shaped air outlet pipes are provided with multiple third air outlet holes.

[0016] Due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0017] This invention provides a carbon black drying tail gas treatment device. The heat exchange medium inlet of the preheater is connected to a high-temperature flue gas pipeline, the outlet of the preheater is connected to a denitrification system, and the outlet of the denitrification system is connected to the heat exchange medium inlet of a waste heat boiler. By using high-temperature flue gas to preheat the drying tail gas, the waste heat of the high-temperature flue gas is effectively recovered, reducing the energy consumption of the subsequent denitrification reaction and improving the overall thermal efficiency of the device. The dried tail gas after denitrification is used as the heat exchange medium of the waste heat boiler to further recover heat energy, reducing the energy consumption of the device.

[0018] The denitrification system of this device includes a denitrification tower with multiple catalyst layers. Each catalyst layer is equipped with a denitrifying agent spraying mechanism, and the inner wall of the tower has multiple baffles. The combined arrangement of multiple catalyst layers and corresponding denitrifying agent spraying mechanisms significantly increases the contact area and time between the gas, solid, and liquid phases, thereby improving denitrification efficiency. The baffles effectively prevent denitrifying agent droplets from directly impacting the catalyst layers, protecting catalyst activity, extending its service life, and simultaneously guiding airflow and droplet distribution, enhancing mixing, and improving denitrification performance.

[0019] The denitrification tower of this device has multiple hollow protrusions inside its gas distribution plate, each of which is connected to a first air inlet pipe. Multiple first air outlets are located on the sidewalls of the hollow protrusions. Multiple second air outlets are located on the sidewalls and top of the gas distribution plate. The dried exhaust gas is scattered and ejected from the first air outlets on the sidewalls of the hollow protrusions, and then discharged through the second air outlets, ensuring that the gas enters the denitrification tower uniformly and improving the denitrification efficiency.

[0020] The desulfurization tower of this device is equipped with swirl vanes at the second nozzle. When the desulfurizing agent liquid flows through the swirl vanes, it generates strong rotation, forming uniform droplets after spraying out, which greatly increases the gas-liquid contact area and significantly improves the desulfurization efficiency. The spiral second inlet pipe and the guide plate on its inner wall inside the desulfurization tower guide the gas to rotate within the second inlet pipe, allowing the dried tail gas to enter the desulfurization tower evenly. The combined arrangement of the outlet plate and the tree-shaped outlet pipe further homogenizes the dried tail gas, ensuring sufficient contact between the dried tail gas and the desulfurizing agent.

[0021] The heat exchange channel and inner wall of the preheater of this device are staggered with multiple baffles, and the surface of the baffles is provided with multiple guide grooves. The staggered baffles change the airflow direction and create turbulence; the guide grooves further turbulent the flow, thereby improving the heat exchange efficiency between the heat exchange medium and the drying exhaust gas. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0023] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this utility model;

[0024] Figure 2 yes Figure 1 Enlarged structural diagram at point A;

[0025] Figure 3 This is a schematic diagram of the inner wall structure of the air distribution plate;

[0026] Figure 4 This is a schematic diagram of the internal structure of the second air intake pipe;

[0027] Figure 5 This is a partial internal structure diagram of the second nozzle;

[0028] Figure 6 yes Figure 1 Enlarged structural diagram at point B;

[0029] In the diagram, 1. Dry exhaust gas duct; 2. Preheater; 3. High-temperature flue gas duct; 4. Waste heat boiler; 5. First fan; 6. Desulfurization tower; 601. Tower body; 602. Second spray pipe; 603. Spray branch pipe; 604. Second nozzle; 605. Swirl blade; 606. Support rod; 607. Second air inlet pipe; 608. Air outlet plate; 609. Guide plate; 610. Dendritic air outlet pipe; 611. Third air outlet; 7. Second fan; 8. Dust collector; 9. Chimney; 10. Denitrification tower; 11. Catalyst layer; 12. Baffle; 13. Air distribution plate; 14. Hollow boss; 15. First air inlet pipe; 16. First air outlet; 17. Second air outlet; 18. First spray pipe; 19. First nozzle; 20. Baffle plate; 21. Guide channel; 22. Demister. Detailed Implementation

[0030] 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 scope of protection of the present utility model.

[0031] Example 1

[0032] like Figures 1-6 As shown, a carbon black drying tail gas treatment device includes a preheater 2 connected to a drying tail gas pipeline 1. The heat exchange medium inlet of the preheater 2 is connected to a high-temperature flue gas pipeline 3. The gas outlet of the preheater 2 is connected to a denitrification system. The gas outlet of the denitrification system is connected to the heat exchange medium inlet of a waste heat boiler 4. The heat exchange medium outlet of the waste heat boiler 4 is connected to a desulfurization tower 6 via a first fan 5. The gas outlet of the desulfurization tower 6 is connected to a dust collector 8 and a chimney 9 in sequence via a second fan 7. The exhaust gas from the carbon black drying process exchanges heat with the high-temperature flue gas duct 3 in the preheater 2, using the waste heat of the high-temperature flue gas to preheat the exhaust gas generated during carbon black drying, reducing the energy consumption of subsequent denitrification and realizing the reuse of waste heat; the dried exhaust gas after waste heat is treated by denitrification tower 10, and the denitrified exhaust gas is used as the heat exchange medium of waste heat boiler 4 to further recover heat energy and facilitate subsequent desulfurization treatment; the dried exhaust gas after heat exchange in waste heat boiler 4 enters desulfurization tower 6 for desulfurization treatment, and finally, after dust removal, it meets the emission standards.

[0033] like Figure 1 and 3As shown, the denitrification system includes a denitrification tower 10, which contains multiple catalyst layers 11. A denitrification agent spraying mechanism is provided above each catalyst layer 11 within the denitrification tower 10. Multiple baffles 12 are provided on the inner wall of the denitrification tower 10, and these baffles 12 are inclined downwards. A gas distribution plate 13 is provided below the denitrification tower 10. Multiple hollow protrusions 14 are provided within the gas distribution plate 13, and each hollow protrusion 14 is connected to a first air inlet pipe 15. Multiple first air outlets 16 are provided on the sidewalls of the hollow protrusions 14. Multiple second air outlets 17 are provided on the sidewalls and top of the gas distribution plate 13.

[0034] The denitrification agent spraying mechanism includes a first spray pipe 18, and the inner wall of the denitrification tower 10 is provided with a plurality of first nozzles 19, all of which are connected to the first spray pipe 18.

[0035] Based on the above configuration, the downward-sloping baffle 12 extends the gas-liquid contact time, preventing the denitrifying agent from escaping through a short circuit, while also promoting uniform liquid film distribution and improving denitrification efficiency. The combined arrangement of multiple hollow protrusions 14, the first air outlet 16, and the second air outlet 17 in the air distribution plate 13 of this device forms a three-dimensional air distribution network, ensuring sufficient contact between the dried exhaust gas and the denitrifying agent, further improving denitrification efficiency.

[0036] like Figure 1 , Figures 4-6 As shown, the desulfurization tower 6 includes a tower body 601, and a desulfurizing agent spraying mechanism is provided on the upper part of the tower body 601. The desulfurizing agent spraying mechanism includes a second spray pipe 602, which is connected to multiple spray branch pipes 603. Multiple spray branch pipes 603 are provided with multiple second nozzles 604. The liquid outlet of the second nozzle 604 is provided with a rotatable swirl blade 605. A support rod 606 is fixedly provided at the liquid outlet of the second nozzle 604. The swirl blade 605 is movably sleeved on the support rod 606. During desulfurization, when the desulfurizing agent is sprayed, when the liquid flows through the second nozzle 604, the swirl blade 605 rotates under the propulsion of the liquid, so that the liquid forms a swirling shape before being sprayed out, increasing the contact area between the liquid and the dry tail gas, enhancing the diffusion effect of the liquid, and improving the desulfurization efficiency.

[0037] The lower part of the desulfurization tower 6 is equipped with an air inlet mechanism, which includes a second air inlet pipe 607 and an air outlet plate 608 connected to the second air inlet pipe 607. The second air inlet pipe 607 is spiral-shaped; multiple guide plates 609 are provided on the inner wall of the second air inlet pipe 607; multiple dendritic air outlet pipes 610 are connected to the air outlet plate 608, and multiple third air outlet holes 611 are provided on the dendritic air outlet pipes 610. The arrangement of the second air inlet pipe 607 and the dendritic air outlet pipes 610 can increase the contact efficiency between the exhaust gas and the desulfurizing agent, thereby improving the desulfurization efficiency.

[0038] Furthermore, such as Figure 1 and Figure 2 As shown in the figure, in this embodiment, multiple baffles 20 are staggered on the heat exchange channel and the inner wall of the preheater 2, and multiple guide grooves 21 are provided on the surface of the baffles 20. The combined design of the baffles 20 and the guide grooves 21 can enhance the turbulence of the heat exchange medium, break the laminar boundary layer, and improve the heat exchange efficiency.

[0039] Furthermore, in this embodiment, as Figure 1 As shown, both the denitrification tower 10 and the desulfurization tower 6 are equipped with demisters 22 at the top, which can effectively intercept droplets and particulate matter in the exhaust gas and improve the exhaust gas treatment effect.

[0040] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A carbon black drying exhaust gas treatment device, characterized in that: The system includes a preheater connected to a dry exhaust gas pipeline. The heat exchange medium inlet of the preheater is connected to a high-temperature flue gas pipeline. The outlet of the preheater is connected to a denitrification system. The outlet of the denitrification system is connected to the heat exchange medium inlet of a waste heat boiler. The heat exchange medium outlet of the waste heat boiler is connected to a desulfurization tower via a first fan. The outlet of the desulfurization tower is connected to a dust collector and a chimney via a second fan. The denitrification system includes a denitrification tower with multiple catalyst layers inside. A denitrification agent spraying mechanism is provided above each catalyst layer inside the denitrification tower. Multiple baffles are provided on the inner wall of the denitrification tower. A gas distribution plate is provided below the denitrification tower. The gas distribution plate has multiple hollow protrusions, each of which is connected to a first air inlet pipe. Multiple first air outlets are provided on the side walls of the hollow protrusions. Multiple second air outlets are provided on the side walls and top of the gas distribution plate.

2. The carbon black drying tail gas treatment device according to claim 1, characterized in that: Multiple baffles are staggered on the heat exchange channels and the inner wall of the preheater, and the surface of the baffles is provided with multiple guide grooves.

3. The carbon black drying tail gas treatment device according to claim 1, characterized in that: Multiple baffles are tilted downwards.

4. The carbon black drying tail gas treatment device according to claim 1, characterized in that: The denitrification agent spraying mechanism includes a first spray pipe, and the inner wall of the denitrification tower is provided with a plurality of first nozzles, all of which are connected to the first spray pipe.

5. The carbon black drying tail gas treatment device according to claim 1, characterized in that: The desulfurization tower includes a tower body, and a desulfurizing agent spraying mechanism is provided on the upper part of the tower body. The desulfurizing agent spraying mechanism includes a second spray pipe, which is connected to multiple spray branch pipes. Multiple second nozzles are provided on the multiple spray branch pipes, and rotatable swirl blades are provided at the liquid outlet of the second nozzle.

6. The carbon black drying tail gas treatment device according to claim 5, characterized in that: A support rod is fixedly provided at the liquid outlet of the second nozzle, and the swirl blade is movably sleeved on the support rod.

7. The carbon black drying tail gas treatment device according to claim 1, characterized in that: Both the denitrification tower and the desulfurization tower are equipped with demisters at the top.

8. The carbon black drying tail gas treatment device according to claim 1, characterized in that: The lower part of the desulfurization tower is provided with an air inlet mechanism, which includes a second air inlet pipe and an air outlet plate connected to the second air inlet pipe. The second air inlet pipe is spiral-shaped.

9. A carbon black drying tail gas treatment device according to claim 8, characterized in that: The inner wall of the second air intake pipe is provided with multiple guide plates.

10. A carbon black drying tail gas treatment device according to claim 8, characterized in that: The air outlet plate is connected to multiple tree-shaped air outlet pipes, and the tree-shaped air outlet pipes are provided with multiple third air outlet holes.

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