Activated carbon adsorption and desorption device for CO catalytic combustion equipment

Abstract

The utility model relates to a kind of active carbon adsorption and desorption devices for CO catalytic combustion equipment, the utility model effectively solves the problems of the existing active carbon adsorption and desorption device lower efficiency, easy to cause local overheating or make desorption not thoroughly, affect continuous production. The active carbon adsorption and desorption device for CO catalytic combustion equipment can make first adsorption box and second adsorption box work synchronously, and they are cyclically replaced, so as to ensure that the equipment can always run continuously, without stopping during desorption. The active carbon adsorption assembly can be efficiently adsorbed and also be convenient to disassemble and replace. The hot air desorption mechanism can make the heat exchange range more uniform, effectively avoid local overheating and make the desorption effect more thorough. The buffer tank can mix the high concentration and low concentration desorption waste gas after desorption, reduce the VOCs concentration fluctuation range entering the catalytic combustion equipment, effectively avoid the problem of catalytic equipment flameout or efficiency decline due to concentration fluctuation, and ensure efficient and stable operation.

Description

Technical Field

[0001] This utility model belongs to the technical field of catalytic combustion equipment, specifically relating to an activated carbon adsorption-desorption device for CO catalytic combustion equipment. Background Technology

[0002] The CO catalytic combustion furnace is a new type of energy-saving and environmentally friendly equipment. It uses adsorption-oxidation decomposition technology to catalytically oxidize harmful gases such as hydrocarbons in organic waste gas, resulting in the discharge of clean gas and achieving the purpose of treatment. Before entering the CO catalytic combustion furnace, the organic waste gas needs to be adsorbed in an activated carbon adsorption-desorption box, and then the saturated activated carbon is desorbed so that the concentrated organic waste gas can enter the CO catalytic combustion furnace.

[0003] Most existing activated carbon adsorption-desorption devices use a set of activated carbon adsorption boxes to treat industrial waste gas containing CO. When the CO concentration in the adsorption box is high, adsorption will stop and the activated carbon adsorbed with CO will be desorbed. However, this adsorption-desorption method has low efficiency, is not convenient for adsorption and desorption to be carried out simultaneously, and cannot uniformly heat all parts of the activated carbon during desorption, which can easily cause local overheating or incomplete desorption. Furthermore, large fluctuations in the VOCs concentration entering the catalytic combustion furnace can lead to flameout or reduced efficiency, which can easily affect continuous production. Utility Model Content

[0004] To address the above issues and overcome the shortcomings of existing technologies, this utility model provides an activated carbon adsorption-desorption device for CO catalytic combustion equipment. This activated carbon adsorption-desorption device ensures continuous operation of the equipment without requiring shutdown during desorption. The hot air desorption mechanism makes the heat exchange range more uniform, effectively avoiding local overheating and ensuring a more thorough desorption effect. The buffer tank mixes the high-concentration and low-concentration desorbed waste gas, reducing the fluctuation range of VOCs concentration entering the catalytic combustion equipment. This effectively avoids the problem of flameout or efficiency reduction caused by concentration fluctuations in the catalytic equipment, ensuring efficient and stable operation.

[0005] An activated carbon adsorption-desorption device for CO catalytic combustion equipment includes a first adsorption box, a second adsorption box, and a buffer tank. Both the first and second adsorption boxes are equipped with activated carbon adsorption components, and each has a hot air desorption mechanism at its bottom. The tops of both the first and second adsorption boxes are fixedly connected to purified gas outlet pipes, and VOC detectors are fixedly installed on the sides of these pipes. The tops of both purified gas outlet pipes are connected to a connecting pipe, through which a first three-way valve is connected. The tops of the sides of both the first and second adsorption boxes are fixedly connected to hot air outlet pipes, and both hot air outlet pipes are connected to a second three-way valve via a connecting pipe. The second three-way valve is connected to the air inlet of the buffer tank via the connecting pipe.

[0006] Preferably, the bottom ends of the first adsorption box and the second adsorption box are both fixedly connected to exhaust gas inlet pipes, and both exhaust gas inlet pipes are connected to a third three-way valve through a connecting pipe. The inlet end of the third three-way valve is connected to an external exhaust gas source pipe.

[0007] Preferably, the sides of the exhaust gas inlet pipe, purified gas outlet pipe, and hot air outlet pipe on the first and second adsorption boxes are all fixedly installed with solenoid valves to control their on / off states.

[0008] Preferably, the activated carbon adsorption assembly includes an annular mounting plate, an activated carbon filter layer, and a temperature sensor. The activated carbon filter layer is fixedly installed inside the annular mounting plate, and the temperature sensor is fixedly installed on the side of the annular mounting plate. The annular mounting plate is horizontally inserted into the inside of the first adsorption box. The number of activated carbon adsorption assemblies is several, and the several activated carbon adsorption assemblies are evenly divided into two groups. The two groups of activated carbon adsorption assemblies are horizontally inserted into the inside of the first adsorption box and the second adsorption box, respectively, and the multiple activated carbon filter layers in each group of activated carbon adsorption assemblies are vertically corresponding.

[0009] Preferably, the hot air desorption mechanism includes a spiral hot air pipe, an air inlet pipe, and an air outlet. The air inlet pipe is connected to the bottom end of the spiral hot air pipe and inserted into the bottom of the side of the first adsorption box. The spiral hot air pipe is in the shape of an inverted cone and is fixedly installed at the bottom of the first adsorption box. Multiple air outlets are equidistantly opened on the upper surface of the spiral hot air pipe, and all air outlets are vertically facing the lower surface of the activated carbon adsorption component. An electromagnetic valve for controlling its flow is fixedly installed on the side of the air inlet pipe. Both air inlets are connected to a fourth three-way valve through a connecting pipe, and the air inlet end of the fourth three-way valve can be connected to the air outlet end of an external catalytic combustion device.

[0010] Preferably, the bottom of the first adsorption box and the second adsorption box are fixedly connected to a support frame, and the first adsorption box and the second adsorption box are both horizontally fixedly installed on the upper surface of the support frame. The bottom and top of the first adsorption box and the second adsorption box are both frustum structures, and the bottom frustum structure is set on the lower surface of the support frame.

[0011] The beneficial effects of the above technical solution are as follows:

[0012] This CO catalytic combustion equipment uses an activated carbon adsorption-desorption device. Through the arrangement of a first adsorption box, a second adsorption box, a buffer tank, activated carbon adsorption components, and a hot air desorption mechanism, the first and second adsorption boxes can operate synchronously. While the first adsorption box performs adsorption, the second adsorption box performs desorption, with the two alternating cycles. This ensures continuous operation of the equipment without requiring shutdown during desorption. The activated carbon adsorption components provide efficient adsorption while being easy to disassemble and replace, avoiding disruption to normal equipment operation. The hot air desorption mechanism ensures more uniform heat exchange, effectively preventing localized overheating and achieving more thorough desorption. The buffer tank mixes the high-concentration and low-concentration desorbed waste gas, reducing the fluctuation range of VOCs concentration entering the catalytic combustion equipment. This effectively prevents the catalytic equipment from shutting down or experiencing efficiency reduction due to concentration fluctuations, ensuring efficient and stable operation. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the first adsorption box, the second adsorption box, and the activated carbon adsorption component of this utility model;

[0015] Figure 3 This is a schematic diagram of the buffer tank of this utility model;

[0016] Figure 4 This is a schematic diagram showing the disassembled state of the first adsorption box, activated carbon adsorption component, and hot air desorption mechanism of this utility model.

[0017] Figure 5 This is a schematic diagram of the hot air desorption mechanism of this utility model.

[0018] In the diagram: 1. First adsorption box; 2. Second adsorption box; 3. Buffer tank; 4. Purified gas outlet pipe; 5. VOC detector; 6. Connecting pipe; 7. First three-way valve; 8. Hot air outlet pipe; 9. Second three-way valve; 10. Waste gas inlet pipe; 11. Third three-way valve; 12. Solenoid valve; 13. Annular mounting plate; 14. Activated carbon filter layer; 15. Temperature sensor; 16. Spiral hot air pipe; 17. Air inlet pipe; 18. Air outlet; 19. Support frame; 20. Fourth three-way valve. Detailed Implementation

[0019] The foregoing and other technical contents, features and effects of this utility model are described in conjunction with the appendix below. Figures 1 to 5 The embodiments are described in detail below.

[0020] This embodiment provides an activated carbon adsorption-desorption device for a CO catalytic combustion equipment, as shown in the attached... Figure 1-5As shown, the device includes a first adsorption box 1, a second adsorption box 2, and a buffer tank 3. A support frame 19 is fixedly connected to the bottom of both the first and second adsorption boxes 1 and 2. Both the first and second adsorption boxes 1 and 2 are horizontally fixedly mounted on the upper surface of the support frame 19. The bottom and top of both the first and second adsorption boxes 1 and 2 are frustum structures, with the bottom frustum structure located on the lower surface of the support frame 19. The frustum structures at the top and bottom of the first and second adsorption boxes 1 and 2 are symmetrically arranged about the horizontal centerline of the first and second adsorption boxes 1 and 2 as an axis of symmetry. Each activated carbon filter is internally equipped with an activated carbon adsorption assembly, which includes an annular mounting plate 13, an activated carbon filter layer 14, and a temperature sensor 15. The activated carbon filter layer 14 is fixedly installed inside the annular mounting plate 13, and the temperature sensor 15 is fixedly installed on the side of the annular mounting plate 13. The temperature sensor 15 can monitor the temperature of the corresponding activated carbon filter layer 14 in real time to prevent the activated carbon filter layer 14 from being damaged due to excessive desorption temperature. Each activated carbon filter layer 14 has a corresponding temperature sensor 15, which can facilitate the stable use of each activated carbon filter layer 14.

[0021] The annular mounting plate 13 is horizontally inserted into the interior of the first adsorption box 1. A handle is fixedly connected to the middle of the outer side of the annular mounting plate 13. Both the upper and lower surfaces of the annular mounting plate 13 near the handle are provided with elastic buckle structures. These elastic buckle structures are existing known technology and are the same as the buckle structures on umbrella telescopic rods, so they will not be elaborated upon here. After the annular mounting plate 13 is inserted into the first adsorption box 1, it can be secured by the elastic buckle structure. When the corresponding activated carbon filter layer 14 needs to be removed, the annular mounting plate can be pulled... The handle on the side of plate 13 is used to pull it outward; there are several activated carbon adsorption components, and these components are divided into two groups. The two groups of activated carbon adsorption components are horizontally inserted into the first adsorption box 1 and the second adsorption box 2, respectively. The multiple activated carbon filter layers 14 in each group of activated carbon adsorption components are vertically arranged in correspondence. The multiple activated carbon adsorption component supports in the first adsorption box 1 and the second adsorption box 2 are arranged parallel to each other and can all abut against the inner wall of the first adsorption box 1 and the second adsorption box 2, ensuring that the exhaust gas can only pass through the activated carbon filter layer 14.

[0022] Both the first adsorption box 1 and the second adsorption box 2 are equipped with a hot air desorption mechanism at their bottom ends. The hot air desorption mechanism includes a spiral hot air pipe 16, an air inlet pipe 17, and an air outlet 18. The air inlet pipe 17 is connected to the bottom end of the spiral hot air pipe 16 and inserted into the bottom of the side of the first adsorption box 1. The spiral hot air pipe 16 is in the shape of an inverted cone and is fixedly installed inside the frustum structure at the bottom of the first adsorption box 1. The inverted cone design of the spiral hot air pipe 16 ensures that the air outlets 18 on its surface are not blocked and can be evenly distributed on various parts of the lower surface of the activated carbon filter layer 14, ensuring that the hot air can fully exchange heat with various parts of the activated carbon filter layer 14, thereby desorbing the CO adsorbed on the activated carbon filter layer 14.

[0023] The upper surface of the spiral hot air duct 16 is provided with multiple air outlet holes 18 at equal intervals, and all air outlet holes 18 are vertically oriented towards the lower surface of the activated carbon adsorption component. The side of the air inlet duct 17 is fixedly installed with a solenoid valve 12 to control its flow. Both air inlet ducts 17 are connected to a fourth three-way valve 20 through a connecting pipe 6, and the air inlet end of the fourth three-way valve 20 can be connected to the air outlet end of the external catalytic combustion equipment. The hot air generated by the catalytic combustion equipment can enter the first adsorption box 1 or the second adsorption box 2 through the fourth three-way valve 20, thereby making reasonable use of the heat source and reducing energy consumption.

[0024] Both the top of the first adsorption box 1 and the second adsorption box 2 are fixedly connected to a purified gas outlet pipe 4, and a VOC detector 5 is fixedly installed on the side of the purified gas outlet pipe 4. The VOC detector 5 can monitor the VOC concentration at the top outlet of the first adsorption box 1 and the second adsorption box 2 in real time, thereby switching the operating status of the first adsorption box 1 and the second adsorption box 2 in a timely manner. When the VOC detector 5 at the top of the first adsorption box 1 detects an increase in the CO concentration at the outlet, it proves that the activated carbon filter layer 14 in the first adsorption box 1 is saturated. Therefore, the exhaust gas can be controlled by the external control unit to enter the second adsorption box 2, so that the second adsorption box 2 can carry out the adsorption process, while the exhaust gas in the first adsorption box 1 is removed. The process is adjusted to a desorption process, enabling two alternating cycles for continuous operation. The tops of the two purified gas outlet pipes 4 are connected to connecting pipes 6, and a first three-way valve 7 is connected through connecting pipes 6. The outlet end of the first three-way valve 7 can be connected to an external pipeline to discharge the filtered purified gas. The tops of the sides of the first adsorption box 1 and the second adsorption box 2 are fixedly connected to hot air outlet pipes 8, and both hot air outlet pipes 8 are connected to second three-way valves 9 through connecting pipes 6. The second three-way valves 9 are connected to the inlet end of the buffer tank 3 through connecting pipes 6. The desorbed gas will enter the buffer tank 3 from the hot air outlet pipes 8, accumulate in the buffer tank 3, and be discharged into the catalytic combustion equipment.

[0025] The bottom ends of the first adsorption box 1 and the second adsorption box 2 are both fixedly connected to exhaust gas inlet pipes 10, and both exhaust gas inlet pipes 10 are connected to a third three-way valve 11 through a connecting pipe 6. The air inlet end of the third three-way valve 11 is connected to an external exhaust gas source pipe. The exhaust gas inlet pipe 10, purified gas outlet pipe 4 and hot air outlet pipe 8 on the first adsorption box 1 and the second adsorption box 2 are all fixedly installed with solenoid valves 12 to control their opening and closing. The solenoid valves 12 can control the flow of the corresponding pipes respectively, thereby facilitating the control of the gas flow direction and dynamically adjusting the operating mode of the first adsorption box 1 and the second adsorption box 2.

[0026] The VOC detector 5, the first three-way valve 7, the second three-way valve 9, the third three-way valve 11, the solenoid valve 12, the temperature sensor 15, and the fourth three-way valve 20 are all electrically connected to the external control unit and are all electrically connected to the external circuit through wires.

[0027] In summary, the activated carbon adsorption-desorption device used in this CO catalytic combustion equipment operates as follows:

[0028] 1. In the initial state, the third three-way valve 11 controls the external exhaust gas to flow only to the first adsorption box 1. The solenoid valves 12 on the air inlet pipe 17, the purified gas outlet pipe 4, the hot air outlet pipe 8 and the exhaust gas inlet pipe 10 on the second adsorption box 2 are all closed. The solenoid valves 12 on the air inlet pipe 17 and the hot air outlet pipe 8 in the first adsorption box 1 are also closed. The exhaust gas is filtered after passing through the activated carbon filter layer 14 in the first adsorption box 1. The filtered purified gas is discharged from the purified gas outlet pipe 4. CO is adsorbed on the activated carbon filter layer 14.

[0029] 2. The VOC detector 5 at the top of the first adsorption box 1 can detect the gas passing through the purified gas outlet pipe 4. When the detected concentration exceeds the set index, it proves that the activated carbon filter layer 14 in the first adsorption box 1 has reached the saturation state. The control unit controls the solenoid valves 12 on the purified gas outlet pipe 4 at the top and the waste gas inlet pipe 10 at the bottom of the first adsorption box 1 to close, and opens the solenoid valves 12 on the air inlet pipe 17 and the hot air outlet pipe 8 in the first adsorption box 1. Then, the second three-way valve 9 and the fourth three-way valve 20 are both adjusted to be connected to the first adsorption box 1. Hot air is introduced into the first adsorption box 1 through the fourth three-way valve 20 to carry out the desorption process inside. The desorbed gas can only enter the buffer tank 3 from the hot air outlet pipe 8 and be discharged into the catalytic combustion equipment.

[0030] 3. Simultaneously, adjust both the third three-way valve 11 and the first three-way valve 7 to connect with the second adsorption box 2. External waste gas enters the second adsorption box 2 for adsorption and filtration. When the VOC detector 5 at the top of the second adsorption box 2 detects that the concentration at the purified gas outlet pipe 4 has increased, control the solenoid valve 12 on the waste gas inlet pipe 10 and the purified gas outlet pipe 4 in the second adsorption box 2 to close, and reconnect the third three-way valve 11 and the first three-way valve 7 to the first adsorption box 1. Control the second three-way valve 9 and the fourth three-way valve 20 to connect with the second adsorption box 2. At the same time, open the solenoid valves on the hot air outlet pipe 8 and the inlet pipe 17 in the second adsorption box 2 to desorb in the second adsorption box 2. The solenoid valve 12 on the inlet pipe 17 and the hot air outlet pipe 8 in the first adsorption box 1 closes again, stops desorption, and switches back to the adsorption state.

[0031] 4. The first adsorption box 1 and the second adsorption box 2 operate alternately in a cycle for adsorption and desorption, which can greatly improve the efficiency of operation and ensure continuous and uninterrupted production.

[0032] The above description is only for illustrating the present utility model. It should be understood that the present utility model is not limited to the above embodiments, and various modifications that conform to the concept of the present utility model are within the protection scope of the present utility model.

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