Temperature controlled carbon-based adsorbent material desorption tower

Abstract

This utility model relates to the field of adsorption material regeneration technology, specifically to a temperature-controllable carbon-based adsorption material desorption tower, comprising a shell, with the inner cavity of the shell consisting of a feed chamber, a temperature-controlled desorption chamber, and a discharge chamber from top to bottom. The feed chamber has a feed inlet and an exhaust outlet at the top, and a material distribution cone is located inside the feed chamber. The discharge chamber has an outlet at the bottom and is connected to a desorption gas inlet pipe. The temperature-controlled desorption chamber has a jacket on its outer wall, forming a gas chamber between the jacket and the outer wall. An annular transverse partition divides the gas chamber into multiple gas distribution chambers, and a longitudinal partition divides each gas distribution chamber into an inlet control chamber and an outlet control chamber. The inlet control chamber and outlet control chamber are respectively equipped with a temperature-controlled inlet and a temperature-controlled outlet. Multiple layers of coils are spaced apart within the temperature-controlled desorption chamber, with both ends of the coils passing through the side wall of the shell and communicating with the inlet control chamber and outlet control chamber of the same gas distribution chamber. This utility model achieves regional temperature control, resulting in more precise temperature control and more convenient temperature adjustment.

Description

Technical Field

[0001] This utility model relates to the field of adsorption material regeneration technology, specifically to a temperature-controllable carbon-based adsorption material desorption tower. Background Technology

[0002] Carbon-based adsorbent materials, such as activated carbon, play a crucial role in environmental protection fields such as VOCs adsorption and treatment and industrial wastewater purification due to their well-developed pore structure and high specific surface area. They can be reused through an "adsorption-regeneration" cycle, which is a key factor in reducing treatment costs. Currently, the industrial regeneration of waste carbon-based adsorbent materials still relies primarily on rotary kiln thermal regeneration processes. However, this process has revealed many technical bottlenecks in practical applications, particularly significant deficiencies in the matching of temperature control precision and desorption efficiency, severely restricting the recycling efficiency of carbon-based materials.

[0003] Rotary kiln thermal regeneration processes rely heavily on electricity or natural gas to heat the kiln body, resulting in high energy consumption and operating costs. More importantly, the core problem lies in insufficient temperature control precision: the hot airflow within the kiln is dynamic, leading to significant uneven contact with the carbon-based material to be regenerated. This results in localized areas of excessively high temperature and other areas below the target desorption temperature. In areas with excessively low temperatures, pollutants adsorbed within the pores of the carbon-based material cannot be fully desorbed, resulting in incomplete desorption and a low recovery rate of adsorption capacity after regeneration, insufficient to meet subsequent adsorption demands. Conversely, excessively high temperatures can easily cause ablation and damage to the microporous structure of the carbon-based material, permanently eliminating its adsorption capacity and generating harmful gases such as CO and VOCs through organic matter pyrolysis, leading to secondary pollution.

[0004] Besides rotary kiln processes, a few existing attempts use desorption towers for regeneration. Different regions within the desorption tower (such as the upper feed zone, the middle desorption reaction zone, and the lower discharge zone) have varying temperature requirements. For instance, the middle desorption zone needs to maintain a higher temperature to ensure efficient pollutant desorption, while the upper and lower zones require temperature control to prevent overheating or condensation. However, existing desorption towers mostly use a single heat source or simple segmented heating methods, lacking a refined temperature control mechanism for different regions within the tower. This results in uneven temperature distribution and ultimately fails to achieve efficient regeneration.

[0005] The aforementioned problems have become obstacles to the large-scale promotion of carbon-based material regeneration technology. Therefore, the development of a carbon-based adsorption material regeneration device that can achieve precise temperature control in different areas of the desorption tower and take into account both efficient desorption and energy conservation and environmental protection has become an urgent need in the field of environmental protection material recycling. Utility Model Content

[0006] The technical problem to be solved by this invention is to propose a temperature-controllable carbon-based adsorption material desorption tower, which realizes regional temperature control, more precise temperature control, and more convenient temperature adjustment.

[0007] The temperature-controllable carbon-based adsorption material desorption tower of this utility model includes a shell. The shell's inner cavity comprises, from top to bottom, an interconnected feed chamber, a temperature-controlled desorption chamber, and a discharge chamber. The feed chamber has an inlet and an outlet at its top. Inside the feed chamber is a distribution cone, which has a conical cap-shaped structure. The outer edge of the distribution cone is fixedly connected to the shell. Several discharge mesh holes are formed on the inclined surface of the distribution cone. Inside the conical cap-shaped structure of the distribution cone is a preheating plate, which is formed by coiling heating tubes into a cone shape. Material channels for material passage are provided between the heating tubes corresponding to the discharge mesh holes. The discharge chamber has an outlet at its bottom and is connected to a desorption gas inlet pipe. Temperature-controlled desorption... The outer wall of the cavity is provided with a jacket, and a gas chamber is formed between the jacket and the outer wall of the temperature-controlled desorption chamber. Several annular transverse partitions arranged from top to bottom around the outer wall of the temperature-controlled desorption chamber divide the gas chamber into multiple gas distribution chambers. Each gas distribution chamber has two longitudinal partitions on both sides, which divide the gas distribution chamber into an inlet control chamber and an outlet control chamber. The inlet control chamber and the outlet control chamber are respectively provided with temperature-controlled inlet and temperature-controlled outlet. Multiple layers of coils are arranged at intervals inside the temperature-controlled desorption chamber. The coils are formed by the tube body spiraling in the horizontal direction. There are gaps between the spiral tube bodies to allow material to pass through. The two ends of the coils pass through the side wall of the shell and are respectively connected to the inlet control chamber and the outlet control chamber of the same gas distribution chamber.

[0008] Preferably, the coil rotates horizontally in situ relative to its adjacent coil, with a rotation angle greater than 0° and less than or equal to 90°. The staggered arrangement of the coils allows the material to be redistributed as it passes through, avoiding uneven local temperatures.

[0009] Preferably, the heating tubes of the preheating plate have a heat medium inlet and a heat medium outlet at both ends passing through the shell. The material distribution cone is fixedly connected to the preheating plate. The preheating plate can preheat the material when it falls, and at the same time, it provides a certain support for the material distribution cone.

[0010] Preferably, the temperature-controlled air inlet is located at the lower part of the air distribution chamber, and the temperature-controlled air outlet is located at the upper part of the air distribution chamber.

[0011] Preferably, the bottom of the discharge chamber is provided with an inverted conical hopper, the outer edge of the large end of the inverted conical hopper is sealed to the inner wall of the discharge chamber, and the bottom outlet of the inverted conical hopper is connected to the discharge port.

[0012] Preferably, the outer wall of the inverted conical hopper is equipped with heat exchange tubes. The heat exchange tubes can recover the heat from the high-temperature recycled material, saving energy.

[0013] Preferably, the desorption gas inlet pipe passes through the wall of the inverted conical hopper and extends upwards. A cone cap is suspended above its outlet. The cone cap is connected to the desorption gas inlet pipe via a fixing rod, which is fixed to the bottom of the cone cap and to the outer wall of the desorption gas inlet pipe at the other end. The cone cap prevents material from falling into the desorption gas inlet pipe and facilitates the entry of desorption gas into the inner cavity of the housing.

[0014] Preferably, the desorption gas inlet outlet is located above the bottom of the cone cap.

[0015] Preferably, multiple thermocouples are installed in the temperature-controlled desorption chamber corresponding to different gas distribution chambers. These multiple thermocouples can monitor the temperature of materials at different heights in real time.

[0016] Preferably, the outer shell is provided with a heat insulation layer.

[0017] Compared with the prior art, the beneficial effects of this utility model are: 1. By setting up a feeding cone, the material is dispersed to avoid accumulation inside the shell and promote uniform heating of the material; at the same time, the preheating plate inside the feeding cone can preheat the material. 2. By setting up jackets, horizontal partitions, and vertical partitions, the gas chamber is divided into multiple layers of inlet and outlet control chambers. Gas is input into the inlet control chamber, enters the coil, flows and exchanges heat in the coil, and then enters the outlet control chamber for discharge. By controlling the gas flow rate and temperature entering the inlet and outlet control chambers, the temperature of the coil can be controlled. Thus, according to the temperature difference of different areas, the temperature of different layers of the temperature-controlled desorption chamber can be precisely adjusted, avoiding the problem of local temperature being too high or too low and difficult to control. 3. This invention provides a more thorough desorption of carbon-based adsorbent materials and is less likely to cause localized overheating that could damage the adsorbent materials or generate secondary pollution. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the desorption tower structure of the temperature-controllable carbon-based adsorption material of this utility model; Figure 2 This is a schematic diagram of the coil structure; Figure 3 This is a schematic diagram of the preheating plate structure; Figure 4 This is a perspective view of the desorption gas inlet pipe and the cone cap. Figure 5 This is a schematic diagram of the gas distribution chamber structure; In the diagram: 1. Shell; 2. Inlet; 3. Outlet; 4. Distributing cone; 5. Feeding mesh; 6. Preheating plate; 7. Material channel; 8. Outlet; 9. Desorption air inlet pipe; 10. Jacket; 11. Horizontal partition; 12. Longitudinal partition; 13. Inlet control chamber; 14. Outlet control chamber; 15. Temperature-controlled air inlet; 16. Temperature-controlled air outlet; 17. Coil; 18. Inverted conical hopper; 19. Heat exchange tube; 20. Conical cap; 21. Fixing rod; 22. Thermocouple. Detailed Implementation

[0019] The present invention will now be described clearly and completely with reference to the accompanying drawings.

[0020] Example 1 like Figure 1 As shown, the temperature-controllable carbon-based adsorption material desorption tower includes a shell 1, with an insulation layer on the outside. The inner cavity of the shell 1 consists of an interconnected feed chamber, a temperature-controlled desorption chamber, and a discharge chamber, arranged from top to bottom. The feed chamber has a feed inlet 2 and an exhaust outlet 3 at its top, and a material distribution cone 4 inside the feed chamber. Figure 3 As shown, the fabric cone 4 has a conical cap-shaped structure. The outer edge of the fabric cone 4 is fixedly connected to the housing 1. Several material feeding mesh holes 5 are opened on the inclined surface of the fabric cone 4. A preheating plate 6 is provided inside the conical cap-shaped structure of the fabric cone 4. The preheating plate 6 is formed by coiling heating tubes into a cone shape. Material channels 7 for material to pass through are provided between the heating tubes and corresponding to the material feeding mesh holes 5. A discharge port 8 is provided at the bottom of the discharge chamber, and the discharge chamber is connected to the desorption air inlet pipe 9. Figure 1 , Figure 5 As shown, the outer wall of the temperature-controlled desorption chamber is provided with a jacket 10, and a gas chamber is formed between the jacket 10 and the outer wall of the temperature-controlled desorption chamber. Several annular transverse partitions 11 arranged from top to bottom around the outer wall of the temperature-controlled desorption chamber divide the gas chamber into multiple gas distribution chambers. Each gas distribution chamber is provided with two longitudinal partitions 12 on both sides, dividing the gas distribution chamber into an inlet control chamber 13 and an outlet control chamber 14. The inlet control chamber 13 and the outlet control chamber 14 are respectively provided with a temperature-controlled inlet 15 and a temperature-controlled outlet 16. Multiple layers of coils 17 are arranged at intervals inside the temperature-controlled desorption chamber. The coils 17 are formed by the tube body spiraling in the horizontal direction. There are gaps between the spiral tube bodies to allow material to pass through. The two ends of the coils 17 are connected to the inlet control chamber 13 and the outlet control chamber 14 of the same gas distribution chamber, respectively.

[0021] like Figure 2 As shown, coil 17 is rotated horizontally in situ relative to its adjacent coil 17 by an angle of 45°.

[0022] The heating tubes of the preheating plate 6 pass through the shell 1 at both ends and are respectively provided with a heat medium inlet and a heat medium outlet. The fabric cone 4 is fixedly connected to the preheating plate 6.

[0023] The temperature-controlled air inlet 15 is located at the lower part of the air distribution chamber, and the temperature-controlled air outlet 16 is located at the upper part of the air distribution chamber.

[0024] Multiple thermocouples 22 are installed in the temperature-controlled desorption chamber corresponding to different gas distribution chambers.

[0025] Work process: The desorbed gas enters the inner cavity of the shell 1 through the desorbed gas inlet pipe 9 and diffuses upward along the gaps between the materials. The carbon-based adsorbent material to be desorbed enters the feeding cavity of the shell 1 through the feed inlet 2, is distributed by the distribution cone 4, and is preheated by the preheating plate 6. It falls through the material channel 7 through the discharge mesh 5 and enters the temperature-controlled desorption chamber, where it is dispersed by the multiple layers of the coil 17 during its descent. At the same time, hot gas is introduced through the temperature-controlled air inlet 15 and enters the coil 17, which is connected to the corresponding air inlet temperature-controlled chamber 13. The heat from the coil 17 heats the desorbed gas in the temperature-controlled desorption chamber and the material in contact with the coil 17, raising the temperature of the area where the coil 17 is located. The high temperature causes the adsorbent material to desorb. The desorbed material is carried away by the desorbed gas and continues to move upward, eventually being discharged from the exhaust port 3. The adsorbent material is regenerated during the descent and desorption process and is sent out from the discharge port 8.

[0026] Temperature control of the temperature-controlled desorption chamber: Gas is input into the inlet temperature-controlled chamber 13 through the temperature-controlled inlet 15. The gas enters the coil 17, flows and exchanges heat in the coil 17, and then enters the outlet temperature-controlled chamber 14 and is discharged through the temperature-controlled outlet 16. By controlling the gas flow rate and temperature entering the inlet temperature-controlled chamber 13 and exiting the outlet temperature-controlled chamber 14, the temperature of the coil 17 can be controlled, thereby controlling the temperature of the area where the coil 17 is located. According to the temperature requirements of different areas, the temperature of different layers in the temperature-controlled desorption chamber can be precisely adjusted, avoiding the problem of local temperature being too high or too low and difficult to control.

[0027] Example 2 Based on Example 1, an inverted conical hopper 18 is provided at the bottom of the discharge chamber. The outer edge of the large end of the inverted conical hopper 18 is sealed to the inner wall of the discharge chamber, and the bottom outlet of the inverted conical hopper 18 is connected to the discharge port 8. A heat exchange tube 19 is coiled around the outer wall of the inverted conical hopper 18. The heat exchange tube 19 can rapidly cool the regenerated adsorbent material through the cold medium flowing inside it, and recover and utilize the heat, thus saving energy.

[0028] like Figure 4 As shown, the desorption gas inlet pipe 9 passes through the wall of the inverted conical hopper 18 and extends upwards. A cone cap 20 is suspended above its outlet. The cone cap 20 is connected to the desorption gas inlet pipe 9 via a fixing rod 21. The fixing rod 21 is fixed to the bottom of the cone cap 20, and the other end of the fixing rod 21 is fixed to the outer wall of the desorption gas inlet pipe 9. The cone cap 20 prevents material from falling into the opening of the desorption gas inlet pipe 9 and facilitates the entry of desorption gas into the inner cavity of the housing 1.

[0029] The outlet of the desorption gas inlet pipe 9 is located above the bottom of the cone cap 20, which prevents the material from accumulating above the opening of the desorption gas inlet pipe 9 and causing poor gas flow.

Claims

1. A temperature-controllable carbon-based adsorption material desorption tower, comprising a shell (1), characterized in that, The inner cavity of the shell (1) consists of an interconnected feeding chamber, a temperature-controlled desorption chamber, and a discharging chamber from top to bottom. The top of the feeding chamber is provided with a feeding port (2) and an exhaust port (3). Inside the feeding chamber is a feeding cone (4), which is a cone-shaped cap structure with several feeding mesh holes (5) on its inclined surface. Inside the cone-shaped cap structure of the feeding cone (4) is a preheating plate (6), which is formed by coiling heating tubes into a cone shape. Material channels (7) for material to pass through are provided between the heating tubes and corresponding to the feeding mesh holes (5). The bottom of the discharging chamber is provided with a discharging port (8), and the discharging chamber is connected to the desorption gas inlet pipe (9). The outer wall of the temperature-controlled desorption chamber is provided with a jacket (10), and the jacket (10) is connected to the outer wall of the temperature-controlled desorption chamber. A gas chamber is formed. Several annular transverse partitions (11) arranged from top to bottom around the outer wall of the temperature-controlled desorption chamber divide the gas chamber into multiple gas distribution chambers. Two longitudinal partitions (12) are provided on both sides of each gas distribution chamber, dividing the gas distribution chamber into an inlet control chamber (13) and an outlet control chamber (14). The inlet control chamber (13) and the outlet control chamber (14) are respectively provided with a temperature-controlled inlet (15) and a temperature-controlled outlet (16). Multiple layers of coils (17) are arranged at intervals in the temperature-controlled desorption chamber. The coils (17) are formed by the tube body spiraling in the horizontal direction. There are gaps between the spiral tube bodies that allow materials to pass through. The two ends of the coils (17) are connected to the inlet control chamber (13) and the outlet control chamber (14) of the same gas distribution chamber.

2. The temperature controlled carbon-based adsorbent material desorption tower of claim 1, wherein, The coil (17) is rotated horizontally in situ relative to its adjacent coil (17) by an angle greater than 0° and less than or equal to 90°.

3. The temperature-controllable carbon-based adsorption material desorption tower according to claim 1, characterized in that, The heating tubes of the preheating plate (6) pass through the shell (1) and are respectively provided with a heat medium inlet and a heat medium outlet. The cloth cone (4) is fixedly connected to the preheating plate (6).

4. The temperature controlled carbon-based adsorbent material desorption tower of claim 1, wherein, The temperature-controlled air inlet (15) is located at the lower part of the air distribution chamber, and the temperature-controlled air outlet (16) is located at the upper part of the air distribution chamber.

5. The temperature controlled carbon-based adsorbent material desorption tower of claim 1, wherein, The bottom of the discharge chamber is provided with an inverted conical hopper (18), the outer edge of the large end of the inverted conical hopper (18) is sealed to the inner wall of the discharge chamber, and the bottom outlet of the inverted conical hopper (18) is connected to the discharge port (8).

6. The temperature controlled carbon-based adsorbent material desorption tower of claim 5, wherein, The outer wall of the inverted conical hopper (18) is provided with heat exchange tubes (19).

7. The temperature-controllable carbon-based adsorption material desorption tower according to claim 6, characterized in that, The desorption gas inlet pipe (9) passes through the wall of the inverted conical hopper (18) and extends upward. A cone cap (20) is suspended above its outlet. The cone cap (20) is connected to the desorption gas inlet pipe (9) through a fixing rod (21). The fixing rod (21) is fixed to the bottom of the cone cap (20), and the other end of the fixing rod (21) is fixed to the outer wall of the desorption gas inlet pipe (9).

8. The temperature controlled carbon-based adsorbent material desorption tower of claim 7, wherein, The air outlet of the desorption air inlet pipe (9) is located above the bottom of the cone cap (20).

9. The temperature controlled carbon-based adsorbent material desorption tower of claim 1, wherein, Multiple thermocouples (22) are installed in the temperature-controlled desorption chamber corresponding to different gas distribution chambers.

10. The temperature-controllable carbon-based adsorption material desorption tower according to claim 1, characterized in that, The outer shell (1) is provided with an insulation layer.

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