Environment-friendly ultra-low emission treatment device for tail gas of crude benzene tube furnace

Abstract

The utility model relates to a crude benzene tube furnace tail gas environment-friendly ultra-low emission treatment device which comprises a tail gas input pipeline, a tail gas output pipeline, a gas distribution pipe and a gas collection pipe, the tail end of the tail gas input pipeline is communicated with the top of the gas distribution pipe, and the head end of the tail gas output pipeline is communicated with the top of the gas collection pipe. The bottom of the gas distributing pipe is fixedly communicated with a plurality of gas distributing branch pipes, the bottom of the gas collecting pipe is fixedly communicated with a plurality of gas collecting branch pipes, control valves are arranged on the gas distributing branch pipes and the gas collecting branch pipes, a gap is reserved between the gas distributing pipe and the gas collecting pipe, and a base is fixedly arranged below the gas distributing pipe and the gas collecting pipe. The vertical part of the adsorption pipe is filled with activated carbon, and two ports of the adsorption pipe face upwards and are detachably connected with a gas distribution branch pipe and a gas collection branch pipe respectively. The tail gas adsorption device can fully adsorb tail gas, can conveniently replace the adsorption pipe without shutdown, and is more practical.

Description

Technical Field

[0001] This utility model belongs to the field of exhaust gas treatment technology, specifically relating to an environmentally friendly ultra-low emission treatment device for exhaust gas from a crude benzene tubular furnace. Background Technology

[0002] The crude benzene tubular furnace is a commonly used chemical equipment, mainly used in the distillation and separation processes of the petrochemical industry. The exhaust gas from this equipment primarily consists of hydrogen sulfide, benzene-based VOCs, ammonia, and naphthalene, among other components. Treatment methods include adsorption, absorption, catalytic combustion, biological methods, and washing. Adsorption primarily utilizes the adsorption properties of adsorbents such as activated carbon to remove harmful substances from the exhaust gas. The corresponding equipment typically consists of an adsorption tower with multiple layers of activated carbon-filled adsorption plates, through which the exhaust gas flows from bottom to top for purification. However, in actual use, the residence time of the exhaust gas in the adsorption tower is relatively short, resulting in insufficient adsorption of harmful components by the activated carbon. This leads to incomplete purification, failing to meet the corresponding ultra-low emission requirements. Furthermore, replacing the adsorption plates is cumbersome and inconvenient, as it cannot be done without shutting down the system, hindering the overall exhaust gas purification process and requiring improvement. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide an environmentally friendly ultra-low emission treatment device for the tail gas of a crude benzene tube furnace, which can achieve more complete adsorption and purification of the tail gas and conveniently replace the adsorption tube without stopping the machine, so as to solve the above problems.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: an environmentally friendly ultra-low emission treatment device for tail gas from a crude benzene tubular furnace, comprising a tail gas input pipeline, a tail gas output pipeline, a gas distribution pipe, and a gas collecting pipe. The tail end of the tail gas input pipeline is connected to the top of the gas distribution pipe, and the head end of the tail gas output pipeline is connected to the top of the gas collecting pipe. The bottom of the gas distribution pipe is fixedly connected to several gas distribution branch pipes spaced apart along its length, and the bottom of the gas collecting pipe is fixedly connected to several gas collecting branch pipes spaced apart along its length. Each gas distribution branch pipe and each gas collecting branch pipe is equipped with a control valve, and both have upper flanges fixedly sleeved on their lower outer sides. Several motors are embedded on the bottom periphery of the upper flanges. The output shafts of the motors face downwards and are fixedly connected to a limiting plate. A gap is left between the gas distribution pipe and the gas collecting pipe, and a base is fixedly installed below both. The base is equipped with several support plates that can be raised and lowered. Each support plate is fixed with a positioning box with an open top. Each support plate has a serpentine adsorption tube above it. The bottom of the adsorption tube is fixedly connected to a positioning block, which is inserted into the corresponding positioning box. Two support mesh plates are fixedly installed at vertical intervals in the vertical part of the adsorption tube. Activated carbon is filled between the two support mesh plates. Both ends of the adsorption tube face upward and are fixedly fitted with a lower flange. Several through grooves are opened on the periphery of the lower flange. Each adsorption tube corresponds to a gas distribution branch pipe and a gas collection branch pipe, and its two ends abut against the bottom end of the corresponding gas distribution branch pipe and gas collection branch pipe, respectively. The lower flange abuts against the corresponding upper flange. The limiting plate corresponds to each through groove and passes through the corresponding through groove. After rotating 90 degrees, the limiting plate abuts against the bottom surface of the corresponding lower flange.

[0005] Preferably, hydraulic cylinders are vertically fixed on the bases on both sides of the bottom of the support plate, and the piston rods of the hydraulic cylinders face upward and are fixedly connected to the bottom of the corresponding support plate.

[0006] Preferably, the positioning block is adapted to the corresponding positioning box.

[0007] Preferably, the cross-sectional area of ​​the through groove is larger than the cross-sectional area of ​​the corresponding limiting plate.

[0008] Preferably, a sealing gasket is fixed at the bottom of the upper flange.

[0009] The beneficial effects of this invention are as follows: When purifying the tail gas of a crude benzene tubular furnace using activated carbon adsorption, the tail gas treated in the previous process can first be transported to the gas distribution pipe via the tail gas input pipeline. Then, the tail gas is distributed to each adsorption pipe through multiple branch pipes on the gas distribution pipe. After passing through the adsorption pipe, the tail gas is collected in the gas collection pipe via the corresponding gas collection branch pipe, and finally discharged through the tail gas output pipeline to be transported to the subsequent process. During the process, the multiple sets of parallel adsorption pipes can effectively ensure the amount of tail gas that can be processed in the same period. The serpentine arrangement of a single adsorption pipe allows the tail gas to flow in a serpentine manner within the corresponding adsorption pipe, which can effectively extend the residence time of the tail gas in the adsorption pipe. This allows multiple sets of activated carbon, which are equivalent to being arranged in series, to perform multiple more thorough adsorption and purification of the flowing tail gas, resulting in a more complete and thorough treatment, which is more conducive to meeting the corresponding environmental protection ultra-low emission requirements.

[0010] When activated carbon processing capacity decreases and replacement is needed, it can be achieved by completely disassembling the corresponding adsorption tube. Specifically: During disassembly, first close the control valves on the gas distribution branch and gas collection branch corresponding to the adsorption tube to be replaced. Then, run the corresponding motor to rotate the corresponding limiting plate 90 degrees until the limiting plate aligns with the corresponding through groove, thus releasing the restriction on the corresponding lower flange. Next, lower the corresponding support plate to move the adsorption tube to a suitable height, separating it from the corresponding gas distribution branch and gas collection branch. Then, remove the adsorption tube from the corresponding support plate. During installation, first align the positioning block on the adsorption tube with the corresponding positioning box insert to achieve initial positioning of the adsorption tube. Then, the corresponding support plate rises, causing the adsorption tube to move upwards until its two ends abut against the corresponding gas distribution branch pipe and gas collection branch pipe. At this point, the lower flange can align and abut against the corresponding upper flange. The limiting plate can pass through the corresponding through groove to the bottom surface of the lower flange. Then, the corresponding motor is run to drive the limiting plate to rotate 90 degrees, so that the limiting plate is perpendicularly offset from the corresponding through groove and presses against the bottom surface of the lower flange, thus limiting and fixing the lower flange. This completes the connection and installation between the adsorption tube and the corresponding gas distribution branch pipe and gas collection branch pipe. After that, the corresponding control valve can be opened. In this way, it is possible to easily disassemble and replace individual adsorption tubes, and they can be replaced one by one according to the actual working conditions. It is only necessary to interrupt the flow of exhaust gas in the corresponding adsorption tube without interrupting the flow of exhaust gas in other adsorption tubes. That is, there is no need to stop the machine when replacing the adsorption tube, making the overall operation simpler and more conducive to the entire exhaust gas purification and treatment operation. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0012] Figure 2 This is a schematic diagram of the left-side structure of this utility model;

[0013] Figure 3This is a schematic diagram of the main structure of the gas distribution branch pipe of this utility model;

[0014] Figure 4 This is a bottom view of the structure of the gas distribution branch pipe of this utility model;

[0015] Figure 5 This is a schematic diagram of the main structure of the base of this utility model;

[0016] Figure 6 This is a schematic diagram of the left side of the base of this utility model;

[0017] Figure 7 This is a schematic diagram of the main structure of the adsorption tube of this utility model;

[0018] Figure 8 This is a schematic diagram of the adsorption tube of this utility model from the left side.

[0019] Figure 9 This is a top view of the adsorption tube port of this utility model;

[0020] Figure 10 This is a schematic diagram of the main structure of the gas distribution branch pipe and the corresponding adsorption tube port of this utility model;

[0021] Figure 11 This is a bottom view of the structure when the gas distribution branch pipe of this utility model is connected to the corresponding adsorption tube port.

[0022] The following are the labels in the diagram: 1 is the exhaust gas input line, 2 is the exhaust gas output line, 3 is the gas distribution pipe, 4 is the gas collection pipe, 5 is the gas distribution branch pipe, 6 is the gas collection branch pipe, 7 is the control valve, 8 is the upper flange, 9 is the motor, 10 is the limit plate, 11 is the base, 12 is the support plate, 13 is the positioning box, 14 is the adsorption pipe, 15 is the positioning block, 16 is the support mesh plate, 17 is the activated carbon, 18 is the lower flange, 19 is the through groove, 20 is the hydraulic cylinder, and 21 is the sealing gasket. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0024] like Figures 1 to 11As shown, an environmentally friendly ultra-low emission treatment device for tail gas from a crude benzene tubular furnace includes a tail gas input pipeline 1, a tail gas output pipeline 2, a gas distribution pipe 3, and a gas collection pipe 4. The tail end of the tail gas input pipeline 1 is connected to the top of the gas distribution pipe 3, and the head end of the tail gas output pipeline 2 is connected to the top of the gas collection pipe 4. The bottom of the gas distribution pipe 3 is fixedly connected to several gas distribution branch pipes 5 spaced apart along its length, and the bottom of the gas collection pipe 4 is fixedly connected to several gas collection branch pipes 6 spaced apart along its length. Both the gas distribution branch pipes 5 and the gas collection branch pipes 6 are equipped with control valves 7, and both have upper flanges 8 fixedly sleeved on their lower outer sides. Several motors 9 are embedded on the bottom periphery of the upper flanges 8, and the output shafts of the motors 9 face downward and are fixedly connected to limit plates 10. A gap is left between the gas distribution pipe 3 and the gas collection pipe 4, and a base 11 is fixedly installed below both. Several support plates 12 are raised and lowered on the base 11. Each support plate 12 is fixedly equipped with a positioning box 13 with an open top. A serpentine adsorption tube 14 is provided above each support plate 12. A positioning block 15 is fixedly connected to the bottom of the adsorption tube 14 and is inserted into the corresponding positioning box 13. Two support mesh plates 16 are fixedly installed at vertical intervals in the vertical part of the adsorption tube 14, and activated carbon 17 is filled between the two support mesh plates 16. Both ends of the adsorption tube 14 face upward and are fixedly sleeved with a lower flange 18. Several through grooves 19 are opened on the periphery of the lower flange 18. Each adsorption tube 14 corresponds to a gas distribution branch pipe 5 and a gas collection branch pipe 6, and its two ends abut against the bottom of the corresponding gas distribution branch pipe 5 and gas collection branch pipe 6 respectively. The lower flange 18 abuts against the corresponding upper flange 8. The limiting plate 10 corresponds to the through groove 19 one by one and passes through the corresponding through groove 19. After the limiting plate 10 rotates 90 degrees, it abuts against the bottom surface of the corresponding lower flange 18.

[0025] When treating the tail gas from a crude benzene tubular furnace with activated carbon adsorption, the tail gas treated in the previous process can first be transported to the gas distribution pipe 3 via the tail gas inlet pipeline 1. Then, the tail gas is distributed to each adsorption pipe 14 through multiple gas distribution branches 5 on the gas distribution pipe 3. After passing through the adsorption pipe 14, the tail gas is collected in the gas collection pipe 4 via the corresponding gas collection branch 6, and finally discharged through the tail gas outlet pipeline 2 to be transported to the subsequent process. During the process, the multiple sets of parallel adsorption pipes 14 can effectively ensure the amount of tail gas that can be treated in the same period. The serpentine arrangement of a single adsorption pipe 14 allows the tail gas to flow in a serpentine manner within the corresponding adsorption pipe 14, which can effectively extend the residence time of the tail gas in the adsorption pipe 14. In turn, multiple sets of activated carbon 17, which are equivalent to being arranged in series, can be used in multiple vertical sections of the adsorption pipe 14 to perform more thorough adsorption and purification on the flowing tail gas, resulting in more complete and thorough treatment, which is more conducive to meeting the corresponding environmental protection ultra-low emission requirements.

[0026] When the activated carbon 17 needs to be replaced due to reduced processing capacity, it can be achieved by completely disassembling and reassembling the corresponding adsorption tube 14. Specifically, during disassembly, first close the control valves 7 on the gas distribution branch pipe 5 and gas collection branch pipe 6 corresponding to the adsorption tube 14 that needs to be replaced. Then, run the corresponding motor 9 to rotate the corresponding limiting plate 10 90 degrees so that the limiting plate coincides with the corresponding through groove 19, thereby releasing the limitation on the corresponding lower flange 18. Then, by lowering the corresponding support plate 12, the corresponding adsorption tube 14 is moved down to a suitable height, thus separating the adsorption tube 14 from the corresponding gas distribution branch pipe 5 and gas collection branch pipe 6. Then, the adsorption tube 14 can be removed from the corresponding support plate 12. During installation, first align the positioning block 15 on the adsorption tube 14 with the corresponding positioning box 13 and insert it into place to achieve the initial positioning of the adsorption tube 14. Then, the corresponding support plate 12 rises, causing the adsorption tube 14 to move upward until its two ends abut against the corresponding gas distribution branch pipe 5 and gas collection branch pipe 6. At this time, the lower flange 18 can be aligned and abut against the corresponding upper flange 8. The limiting plate 10 can pass through the corresponding through groove 19 to the bottom surface of the lower flange 18. Then, the corresponding motor 9 is run to drive the limiting plate 10 to rotate 90 degrees, so that the limiting plate 10 is perpendicularly offset from the corresponding through groove 19 and presses against the bottom surface of the lower flange 18, limiting and fixing the lower flange 18, thereby completing the connection and installation between the adsorption tube 14 and the corresponding gas distribution branch pipe 5 and gas collection branch pipe 6. After that, the corresponding control valve 7 can be opened. This allows for convenient disassembly and replacement of individual adsorption tubes 14, and they can be replaced one by one according to the actual working conditions. Only the flow of exhaust gas in the corresponding adsorption tube 14 needs to be interrupted, without interrupting the flow in other adsorption tubes 14. That is, no machine shutdown is required when replacing adsorption tubes 14, making the overall operation simpler and more conducive to the entire exhaust gas purification process. Existing technologies can be used for both the exhaust gas inlet line 1 and the exhaust gas outlet line 2, and they can be used with existing air pumps to transport the exhaust gas. Existing conventional stepper motors with brake functions can be used for the motor 9 to achieve rotation at the corresponding angle and position locking after rotation.

[0027] In this embodiment, hydraulic cylinders 20 are vertically fixed on the bases 11 on both sides of the bottom of the support plate 12. The piston rods of the hydraulic cylinders 20 face upward and are fixedly connected to the bottom of the corresponding support plate 12. This allows the corresponding support plate 12 to be raised or lowered by extending or retracting the piston rods of the hydraulic cylinders 20, thus facilitating the disassembly and replacement of the adsorption tube 14. The hydraulic cylinders 20 and their required synchronous control oil circuit system can all be based on existing technology and will not be described in detail here.

[0028] In this embodiment, the positioning block 15 is adapted to the corresponding positioning box 13 to ensure that the positioning block 15 is smoothly inserted into the corresponding positioning box 13, so as to achieve the positioning and placement of the adsorption tube 14.

[0029] In this embodiment, the cross-sectional area of ​​the through groove 19 is larger than the cross-sectional area of ​​the corresponding limiting plate 10, so as to ensure that when the adsorption tube 14 is installed, the limiting plate 10 can smoothly pass through the corresponding through groove 19 and make its top surface flush with the bottom surface of the lower flange 18, so that the limiting plate 10 can rotate 90 degrees under the drive of the corresponding motor 9 and press against the bottom surface of the lower flange 18 after rotating 90 degrees, thereby realizing the connection and installation of the adsorption tube 14.

[0030] In this embodiment, a sealing gasket 21 is fixedly provided at the bottom of the upper flange 14 to ensure the sealing of the connection between the adsorption tube 14 and the corresponding gas distribution branch tube 5 and gas collection branch tube 6, and to prevent air leakage.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An environmentally friendly ultra-low emission treatment device for tail gas from a crude benzene tubular furnace, characterized in that, The system includes an exhaust gas inlet pipeline, an exhaust gas outlet pipeline, a gas distribution pipe, and a gas collection pipe. The tail end of the exhaust gas inlet pipeline is connected to the top of the gas distribution pipe, and the head end of the exhaust gas outlet pipeline is connected to the top of the gas collection pipe. The bottom of the gas distribution pipe is fixedly connected to several gas distribution branch pipes spaced apart along its length, and the bottom of the gas collection pipe is fixedly connected to several gas collection branch pipes spaced apart along its length. Each gas distribution branch pipe and each gas collection branch pipe is equipped with a control valve, and both have upper flanges fixedly fitted onto their lower outer sides. Several motors are embedded on the bottom periphery of the upper flanges, with the output shafts of the motors facing downwards and fixedly connected to limit plates. A gap is left between the gas distribution pipe and the gas collection pipe, and a base is fixedly installed below both. Several support plates are vertically adjustable on the base. Each support plate... Each support plate is fixed with a positioning box with an open top. Each support plate has a serpentine adsorption tube above it. The bottom of the adsorption tube is fixedly connected to a positioning block, which is inserted into the corresponding positioning box. Two support mesh plates are fixedly installed at vertical intervals in the vertical part of each adsorption tube. Activated carbon is filled between the two support mesh plates. Both ends of the adsorption tube face upward and are fixedly fitted with a lower flange. Several through grooves are opened on the periphery of the lower flange. Each adsorption tube corresponds to a gas distribution branch pipe and a gas collection branch pipe, and its two ends abut against the bottom end of the corresponding gas distribution branch pipe and gas collection branch pipe, respectively. The lower flange abuts against the corresponding upper flange. The limiting plate corresponds to each through groove and passes through the corresponding through groove. After rotating 90 degrees, the limiting plate abuts against the bottom surface of the corresponding lower flange.

2. The environmentally friendly ultra-low emission treatment device for crude benzene tubular furnace tail gas according to claim 1, characterized in that, Hydraulic cylinders are vertically fixed on the bases on both sides of the bottom of the support plate, with the piston rods of the hydraulic cylinders facing upwards and fixedly connected to the bottom of the corresponding support plate.

3. The ultra-low emission environmental protection treatment device for crude benzene tubular furnace tail gas according to claim 1, characterized in that, The positioning block is adapted to the corresponding positioning box.

4. The ultra-low emission environmental protection treatment device for crude benzene tubular furnace tail gas according to claim 1, characterized in that, The cross-sectional area of ​​the through groove is larger than the cross-sectional area of ​​the corresponding limiting plate.

5. The ultra-low emission environmental protection treatment device for crude benzene tubular furnace tail gas according to claim 1, characterized in that, A sealing gasket is fixed at the bottom of the upper flange.

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