Regeneration system for desulfurization and denitrification of activated carbon

Abstract

The utility model belongs to the technical field of regeneration towers, and discloses a regeneration system for desulfurization and denitrification of activated carbon, which comprises a tower body and a blanking device. Wherein a plurality of tower bodies and a plurality of discharging devices are arranged. A feeding section, a heating section, an analysis section, a cooling section and a discharging section are arranged in the tower body from top to bottom, the feeding section is configured to be used for feeding materials, the heating section is configured to be communicated with a hot air device, the analysis section is configured to be communicated with a nitrogen device, the cooling section is configured to be communicated with a cooling device, and an exhaust port communicated with the outside is formed in the analysis section; the multiple discharging devices and the multiple tower bodies are arranged in a one-to-one correspondence mode, the size of the discharging section is gradually reduced from top to bottom, a discharging opening is formed in the bottom end of the discharging section, the input ends of the discharging devices communicate with the discharging opening, and the output ends of the discharging devices communicate with the outside. By means of the arrangement, the regeneration system for activated carbon desulfurization and denitrification can reduce the coupling property of the system, discharging is more convenient, and operation is easy.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of regenerating tower, especially to a regenerating system for activated carbon desulfurization and denitrification. BACKGROUND

[0002] In the sintering flue gas purification system of the steel industry, the saturated activated carbon needs to be regenerated by high-temperature analysis through the tower body after adsorption. The existing technology generally adopts a double-tower parallel process, and the core process is as follows: the saturated activated carbon in the purification tower is discharged through a double-valve core unloader, lifted to the top of the tower body by a Z-shaped chain bucket machine, and distributed to two tower bodies through a chute. After the activated carbon is treated by the tower body, it is transported to a vibrating screen separation device by a long-shaft chute, and finally returns to the purification tower to form a closed loop.

[0003] However, the above process has the following defects: 1. High system coupling degree: the nitrogen pipe network, high-temperature flue gas chamber, cooling air pipe, and regenerated carbon outlet chute of the two towers are designed without isolation. When a single tower is burned through or the chute is blocked in the high-temperature section, the entire system needs to be depressurized and emptied, thereby forcing the hot blast furnace to shut down and the activated carbon regeneration in the purification tower to be interrupted; 2. Low energy efficiency: the heat loss of the hot air circulation system will be caused by the intercommunication of flue gas between the towers; 3. Poor maintenance safety: maintenance personnel need to enter the closed space after the system is completely shut down, which has multiple risks such as high-temperature scalding, exposure to toxic gases (SOx, NOx), and nitrogen suffocation; 4. Difficult and inconvenient to discharge: due to sealing leakage, activated carbon is prone to leakage during discharge, and problems such as frictional electrostatic adsorption and high-temperature caking of activated carbon in the chute may occur, thereby causing uneven distribution and blockage of activated carbon. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a regenerating system for activated carbon desulfurization and denitrification, which can reduce system coupling, make discharging more convenient, and be easy to operate.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A regenerating system for activated carbon desulfurization and denitrification comprises:

[0007] A plurality of tower bodies, the inside of the tower body is provided with a feeding section, a heating section, an analysis section, a cooling section, and a discharging section from top to bottom, the feeding section is configured to pass in material, the heating section is configured to be connected to a hot air device, the analysis section is configured to be connected to a nitrogen device, the cooling section is configured to be connected to a cooling device, and the analysis section is provided with an exhaust port connected to the outside;

[0008] A plurality of feeding devices are provided, corresponding one-to-one with a plurality of the tower bodies. The size of the feeding section gradually decreases from top to bottom. The bottom end of the feeding section is provided with a discharge port. The input end of the feeding device is connected to the discharge port, and the output end of the feeding device is connected to the outside.

[0009] Optionally, the heating section is connected to the hot air device through a first pipe, and a first sealing element is detachably provided on the first pipe.

[0010] Optionally, the first sealing element is connected to the first pipe by bolt thread.

[0011] Optionally, the analytical section is connected to the nitrogen device via a second pipe, and the second pipe is equipped with a valve.

[0012] Optionally, the valve is a ball valve.

[0013] Optionally, the cooling section is connected to the cooling device via a third pipe, and a second sealing element is detachably provided on the third pipe.

[0014] Optionally, the second sealing element is connected to the third pipe by bolt thread.

[0015] Optionally, the heating section is provided with a heat exchange tube connected to the exhaust port, and the heat exchange tube is configured to contain the material.

[0016] Optionally, multiple heat exchange tubes are provided, and the multiple heat exchange tubes are arranged parallel to each other and spaced apart.

[0017] Optionally, a sealing element is provided between the discharge port and the input end of the feeding device.

[0018] The beneficial effects of this utility model are:

[0019] This invention provides a regeneration system for activated carbon desulfurization and denitrification, comprising a tower body and a feeding device. Several tower bodies and feeding devices are provided, with each feeding device corresponding to one tower body, ensuring that each tower body and feeding device is independent and reducing the coupling of the entire system. The interior of each tower body, from top to bottom, includes a feeding section, a heating section, a desorption section, a cooling section, and a feeding section. Material is introduced into the feeding section; the heating section is connected to a hot air device; the desorption section is connected to a nitrogen device; and the cooling section is connected to a cooling device. This ensures that the feeding, heating, desorption, cooling, and discharging processes of each tower body do not affect each other. The desorption section has an exhaust port connected to the outside, allowing the waste gas generated after material desorption to be discharged promptly. The size of the feeding section gradually decreases from top to bottom, facilitating smoother material flow during the feeding process and preventing uneven material distribution or even blockage. The bottom of the feeding section is equipped with a discharge port. The input end of the feeding device is connected to the discharge port, and the output end of the feeding device is connected to the outside, allowing each tower to feed independently without interference, thereby more effectively controlling the material feeding process. Through the above settings, the regeneration system for activated carbon desulfurization and denitrification of this application can reduce system coupling, making feeding more convenient and easier to operate. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a regeneration system for activated carbon desulfurization and denitrification provided in an embodiment of this utility model.

[0021] In the picture:

[0022] 100. Feeding device;

[0023] 1. Tower body; 11. Feeding section; 12. Heating section; 13. Desorption section; 14. Cooling section; 15. Discharge section; 151. Discharge port; 16. Exhaust port; 21. First pipe; 22. First sealing element; 23. Second pipe; 24. Valve; 25. Third pipe; 26. Second sealing element. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0025] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they 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.

[0026] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0027] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0028] In sintering flue gas purification systems in the steel industry, activated carbon needs to undergo high-temperature desorption and regeneration in a tower after adsorption saturation. Current technologies generally employ a parallel dual-tower process. The core flow is as follows: saturated activated carbon in the purification tower is discharged via a dual-valve-core unloader, lifted to the top of the tower by a Z-type chain bucket elevator, and then distributed to the two towers via chutes. After processing in the towers, the activated carbon is conveyed to a vibrating screen via a long-shaft chute, and finally returned to the purification tower, forming a closed-loop cycle.

[0029] However, the above process has the following drawbacks: 1. High system coupling: The nitrogen pipelines, high-temperature flue gas chambers, cooling air ducts, and regenerated carbon outlet chutes of the two towers are all designed without isolation. When a high-temperature section of a single tower burns through or the chutes become blocked, the entire system needs to be depressurized and emptied, which forces the hot blast furnace to shut down and the activated carbon regeneration in the purification tower to be interrupted; 2. Low energy efficiency: The hot blast circulation system suffers heat loss due to the interconnection of flue gas between towers; 3. Poor maintenance safety: Maintenance personnel must enter the confined space to work after the system is completely shut down, posing multiple risks of high-temperature burns, exposure to toxic gases (SOx, NOx), and nitrogen asphyxiation; 4. Difficult material feeding and operation: Due to sealing leaks, activated carbon is prone to leakage during feeding. Moreover, activated carbon will experience problems such as frictional electrostatic adsorption and high-temperature agglomeration in the chutes, leading to uneven distribution and blockage of activated carbon.

[0030] Therefore, there is an urgent need for a regeneration system for activated carbon desulfurization and denitrification to solve the above-mentioned technical problems.

[0031] like Figure 1 As shown, this embodiment provides a regeneration system for activated carbon desulfurization and denitrification, which includes a tower body 1 and a feeding device 100. Several tower bodies 1 and several feeding devices 100 are provided. The interior of the tower body 1, from top to bottom, includes a feeding section 11, a heating section 12, a separation section 13, a cooling section 14, and a feeding section 15. The feeding section 11 is configured to introduce materials, the heating section 12 is configured to be connected to a hot air device, the separation section 13 is configured to be connected to a nitrogen device, and the cooling section 14 is configured to be connected to a cooling device. The separation section 13 has an exhaust port 16 connected to the outside. Several feeding devices 100 are arranged one-to-one with several tower bodies 1. The size of the feeding section 15 gradually decreases from top to bottom. The bottom end of the feeding section 15 has an outlet 151. The input end of the feeding device 100 is connected to the outlet 151, and the output end of the feeding device 100 is connected to the outside.

[0032] In this embodiment, several tower bodies 1 and several feeding devices 100 are provided, with each feeding device 100 corresponding to one tower body 1, making each tower body 1 and feeding device 100 independent, which helps reduce the coupling of the entire system. The interior of the tower body 1, from top to bottom, includes a feeding section 11, a heating section 12, a desorption section 13, a cooling section 14, and a feeding section 15. Material is fed into the feeding section 11, the heating section 12 is connected to a hot air device, the desorption section 13 is connected to a nitrogen device, and the cooling section 14 is connected to a cooling device, ensuring that the feeding, heating, desorption, cooling, and discharging of each tower body 1 do not affect each other. The desorption section 13 has an exhaust port 16 connected to the outside, allowing the waste gas generated after material desorption to be discharged promptly. The size of the feeding section 15 gradually decreases from top to bottom, which helps the material flow more smoothly during the feeding process and avoids uneven material flow or even blockage. The bottom end of the feeding section 15 is provided with a discharge port 151. The input end of the feeding device 100 is connected to the discharge port 151, and the output end of the feeding device 100 is connected to the outside, so that each tower body 1 can feed independently without interference, thereby more effectively controlling the material feeding process. With the above settings, the regeneration system for activated carbon desulfurization and denitrification in this embodiment can reduce system coupling, making feeding more convenient and easier to operate.

[0033] It should be noted that the hot air device includes, but is not limited to, a hot air furnace, an electric heater, or a steam heat exchanger; the nitrogen device includes, but is not limited to, a nitrogen generator, a nitrogen storage tank, or a nitrogen booster pump; the cooling device includes, but is not limited to, a cooling tower or a plate cooler; and the feeding device 100 includes, but is not limited to, a dual-valve core unloader, a rotary valve unloader, or a screw conveyor. Furthermore, those skilled in the art are well aware of the specific structure and working principle of the above-mentioned devices, and will not elaborate further here.

[0034] Furthermore, it should be noted that in this embodiment, the material is activated carbon, which can be desorbed using this regeneration system. In other embodiments, the material is alumina or silica gel; the specific structure of the material is not limited here.

[0035] Furthermore, the dimensions of the feeding section 15 specifically refer to its cross-sectional area in the horizontal direction. The cross-sectional area of ​​the feeding section 15 gradually decreases from top to bottom. That is, in this embodiment, the feeding section 15 is conical, which helps the material flow more smoothly during the feeding process. In other embodiments, the feeding section 15 can also be triangular pyramidal. The specific structure of the feeding section 15 is not limited here, as long as it can achieve the above-mentioned functions.

[0036] The specific structure of the regeneration system used for activated carbon desulfurization and denitrification is described below:

[0037] Specifically, such as Figure 1As shown, the heating section 12 is connected to the hot air device via a first pipe 21. A first sealing element 22 is detachably installed on the first pipe 21. This arrangement provides flexibility for the connection between the heating section 12 and the hot air device. When operators need to inspect or maintain the heating section 12 or the hot air device, the connection between the heating section 12 and the hot air device can be disconnected by installing the first sealing element 22, thereby improving the maintainability and maintenance efficiency of the system.

[0038] More specifically, in this embodiment, the first sealing element 22 is a blind flange, which can promptly isolate and cut off the connection between the heating section 12 and the hot air device, while ensuring sealing and ease of disassembly and maintenance. In other embodiments, the first sealing element 22 is a butterfly valve. When it is necessary to cut off the connection between the heating section 12 and the hot air device, the operator only needs to rotate the valve plate of the butterfly valve to quickly close the first pipe 21 and prevent the flow of hot air, which is not only easy to operate but also meets the requirements of sealing. It is understood that the specific structure of the first sealing element 22 is not limited, as long as it can achieve the above-mentioned functions.

[0039] More specifically, the first sealing element 22 is connected to the first pipe 21 by bolt threads, which not only improves the connection strength and sealing performance, but also facilitates disassembly and installation, and is simple and convenient to operate.

[0040] Specifically, the desorption section 13 is connected to the nitrogen unit via a second pipe 23. A valve 24 is installed on the second pipe 23, allowing operators to easily control the connection and disconnection between the nitrogen unit and the desorption section 13. During the activated carbon desorption and regeneration process, the nitrogen flow rate and timing can be precisely controlled by opening or closing valve 24, meeting the nitrogen requirements of the desorption section 13 and improving the desorption effect. Simultaneously, when maintenance is required on the desorption section 13 or the nitrogen unit, valve 24 can be closed to cut off the nitrogen supply, ensuring safety during the maintenance process.

[0041] More specifically, in this embodiment, valve 24 is a ball valve, which has advantages such as simple structure, convenient operation, good sealing performance, and low fluid resistance. In other embodiments, valve 24 is a butterfly valve, which can also achieve the above functions. Therefore, the specific structure of valve 24 is not limited in detail here.

[0042] Specifically, cooling section 14 is connected to the cooling device via a third pipe 25. A second sealing element 26 is detachably installed on the third pipe 25. When cooling section 14 or the cooling device malfunctions and requires maintenance, operators can install the second sealing element 26 on the third pipe 25, thereby disconnecting the connection between cooling section 14 and the cooling device. This facilitates separate maintenance and repair of cooling section 14 or the cooling device. Simultaneously, it also facilitates cleaning and inspection of the third pipe 25, ensuring smooth flow of the cooling medium and improving the cooling effect.

[0043] More specifically, in this embodiment, the second sealing element 26 is a blind flange, which can promptly isolate and cut off the connection between the cooling section 14 and the cooling device, while ensuring sealing and ease of disassembly and maintenance. In other embodiments, the first sealing element 22 is a butterfly valve. When it is necessary to cut off the connection between the cooling section 14 and the cooling device, the operator only needs to rotate the valve plate of the butterfly valve to quickly close the third pipe 25 and prevent the flow of cooling medium, which is not only easy to operate but also meets the requirements of sealing. It is understood that the specific structure of the second sealing element 26 is not limited, as long as it can achieve the above-mentioned functions.

[0044] More specifically, the second sealing element 26 is connected to the third pipe 25 by bolt threads, which not only improves the connection strength and sealing performance, but also facilitates disassembly and installation, making the operation simple and convenient.

[0045] Specifically, the heating section 12 is equipped with a heat exchange tube connected to the exhaust port 16. The heat exchange tube is configured to hold material, thereby increasing the contact area between the material and the hot air and improving the heat exchange efficiency. When the hot air flows outside the heat exchange tube, it transfers heat to the material inside the heat exchange tube, allowing the material to fully absorb heat, thus accelerating the heating rate of the activated carbon and improving the efficiency of desorption and regeneration. At the same time, the exhaust port 16 can promptly discharge the waste gas generated during the heating process, thereby ensuring the stability of the environment inside the heating section 12.

[0046] More specifically, there are multiple heat exchange tubes arranged in parallel and spaced apart, which can further increase the contact area between the material and the hot air, and improve the uniformity and efficiency of heat exchange.

[0047] Specifically, a sealing element is provided between the discharge port 151 and the input end of the feeding device 100 to effectively prevent material leakage during the conveying process. The sealing element can be a rubber ring or a silicone ring; the specific structure of the sealing element is not specified here.

[0048] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A regeneration system for activated carbon desulfurization and denitrification, characterized in that, include: Several tower bodies (1) are provided inside the tower body (1) from top to bottom, including a feeding section (11), a heating section (12), a separation section (13), a cooling section (14) and a discharging section (15). The feeding section (11) is configured to introduce materials, the heating section (12) is configured to be connected to a hot air device, the separation section (13) is configured to be connected to a nitrogen device, the cooling section (14) is configured to be connected to a cooling device, and the separation section (13) has an exhaust port (16) connected to the outside. A plurality of feeding devices (100) are provided in a one-to-one correspondence with a plurality of the tower bodies (1). The size of the feeding section (15) gradually decreases from top to bottom. The bottom end of the feeding section (15) is provided with a discharge port (151). The input end of the feeding device (100) is connected to the discharge port (151), and the output end of the feeding device (100) is connected to the outside.

2. The regeneration system for activated carbon desulfurization and denitrification according to claim 1, characterized in that, The heating section (12) is connected to the hot air device through a first pipe (21), and a first sealing member (22) is detachably provided on the first pipe (21).

3. The regeneration system for activated carbon desulfurization and denitrification according to claim 2, characterized in that, The first sealing element (22) is connected to the first pipe (21) by bolt thread.

4. The regeneration system for activated carbon desulfurization and denitrification according to claim 1, characterized in that, The analytical section (13) is connected to the nitrogen device through a second pipe (23), and a valve (24) is provided on the second pipe (23).

5. The regeneration system for activated carbon desulfurization and denitrification according to claim 4, characterized in that, The valve (24) is a ball valve.

6. The regeneration system for activated carbon desulfurization and denitrification according to claim 1, characterized in that, The cooling section (14) is connected to the cooling device through a third pipe (25), and a second sealing element (26) is detachably provided on the third pipe (25).

7. The regeneration system for activated carbon desulfurization and denitrification according to claim 6, characterized in that, The second sealing element (26) is connected to the third pipe (25) by bolt thread.

8. The regeneration system for activated carbon desulfurization and denitrification according to claim 1, characterized in that, The heating section (12) is provided with a heat exchange tube connected to the exhaust port (16), and the heat exchange tube is configured to contain the material.

9. The regeneration system for activated carbon desulfurization and denitrification according to claim 8, characterized in that, The heat exchange tubes are provided in multiple ways, and the multiple heat exchange tubes are arranged parallel to each other and spaced apart.

10. The regeneration system for activated carbon desulfurization and denitrification according to any one of claims 1-9, characterized in that, A sealing element is provided between the discharge port (151) and the input end of the feeding device (100).

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