Device for adsorbing oven tail gas by using activated carbon
By designing the activated carbon adsorption and drying furnace exhaust device, using negative pressure fans and activated carbon plates to absorb exhaust gas and coke ash, the problems of coke ash aggregation and environmental pollution in traditional positive pressure drying furnaces are solved, and the stability and environmental protection performance of the cracking furnace oven are improved.
Patent Information
- Application Number
- CN202421650861.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-12
- Publication Date
- 2025-04-22
- Estimated Expiration
- 2034-07-12
AI Technical Summary
When traditional positive pressure ovens are used in cracking furnaces, coke ash is prone to gather at the electrode interface, resulting in frequent interruption of electric shock and ovens, and exhaust gas and coke ash pollute the environment.
A activated carbon adsorption and drying furnace exhaust device is designed, including primary and secondary adsorption tanks, forming a micro-negative pressure through a negative pressure fan, and using activated carbon plates to absorb exhaust gas and coke ash to prevent it from being discharged into the atmosphere.
It effectively avoids the accumulation of coke ash at the electrode interface, reduces the frequency of oven interruption, improves the stability of cracking furnace oven, and reduces environmental pollution through activated carbon adsorption.
Smart Images
Figure CN222777850U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of tail gas treatment, in particular to an activated carbon adsorption drying furnace tail gas device. Background Art
[0002] When the cracking furnace is built, the moisture contained in the lining and refractory materials of the newly built cracking furnace needs to be slowly and evenly removed to ensure that the cracking furnace does not crack, fall off or collapse; the traditional operation is to introduce nitrogen flow rate of 300-400Nm3 / h into the cracking furnace and then introduce cracking electricity to dry the furnace. The tail gas of the cracking furnace is discharged at the chimney in front of the furnace along with the nitrogen, and the entire drying system is a positive pressure drying furnace. The traditional process uses a positive pressure drying furnace, and the coke ash produced is easy to gather at the interface of the three electrodes, and electric shock is formed at the electrode interface, resulting in frequent interruption of the baking furnace, and the baking effect of the cracking furnace is not good; and during the baking process, the tail gas and coke ash are discharged from the chimney into the atmosphere, polluting the environment. Utility Model Content
[0003] The purpose of the utility model is to provide an activated carbon adsorption drying furnace tail gas device to solve the problem that the traditional process proposed in the above background technology adopts a positive pressure drying furnace, and the coke ash produced is easy to gather at the interface of three electrodes, forming electric shock at the electrode interface, resulting in frequent interruptions of the drying furnace and poor baking effect of the cracking furnace; and the tail gas and coke ash are discharged into the atmosphere from the chimney during the baking process, polluting the environment.
[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an activated carbon adsorption drying furnace exhaust gas device, comprising a first-level adsorption tank, one side of the first-level adsorption tank is connected to a second-level adsorption tank, the other side of the second-level adsorption tank is connected to a negative pressure fan, the other side of the negative pressure fan is connected to an exhaust gas treatment tower, both ends of the negative pressure fan are provided with a reducing cover, the two ends of the negative pressure fan are respectively connected to the output end of the second-level adsorption tank and the input end of the exhaust gas treatment tower through the reducing cover, partitions are provided on both sides of the first-level adsorption tank and the second-level adsorption tank, activated carbon plates are provided inside the first-level adsorption tank and the second-level adsorption tank and between the two partitions, four activated carbon plates are vertically provided inside the first-level adsorption tank and the second-level adsorption tank, and through holes are staggered on the partitions and between the activated carbon plates.
[0005] Preferably, both ends of the first-stage adsorption tank and the second-stage adsorption tank are provided with connecting covers, and the outer ends of the connecting covers and both ends of the variable-diameter covers are provided with connecting flanges. The connecting cover, the variable-diameter cover and the negative pressure fan are connected through the connecting flanges, and the inner diameter of one end of the variable-diameter cover is consistent with that of the connecting cover, and the inner diameter of the other end of the variable-diameter cover is consistent with that of the negative pressure fan.
[0006] Preferably, an insert well is provided at the upper end of the primary adsorption tank and the secondary adsorption tank at a position corresponding to the activated carbon plate, and the upper end of the insert well is sealed and connected with a sealing cover by bolts.
[0007] Preferably, a sealing edge is provided at a position corresponding to the activated carbon plate at the outer edge of the primary adsorption tank, the secondary adsorption tank and the partition.
[0008] Preferably, a waste outlet is provided on the lower wall of the primary adsorption tank and the secondary adsorption tank and on the outer side of the activated carbon plate.
[0009] Compared with the prior art, the beneficial effects of the utility model are: instead of the traditional production process using a positive pressure drying furnace, the coke ash produced by the negative pressure drying furnace enters the activated carbon device with the negative pressure and is adsorbed, there is no coke ash accumulation at the electrode interface, electric shock is not easily generated, the stability of the cracking furnace drying is improved, and the exhaust gas and coke ash are adsorbed by the activated carbon during the drying process to avoid environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is an axonometric drawing of the main structure of the utility model;
[0011] Figure 2 This is an axonometric cross-sectional view of the first-stage adsorption tank structure of the utility model;
[0012] Figure 3 This is a front cross-sectional view of the main structure of the utility model;
[0013] Figure 4 It is a schematic diagram of the main structure of the utility model;
[0014] Figure 5 It is a top view schematic diagram of the main structure of the utility model.
[0015] In the figure: 1-primary adsorption tank, 2-secondary adsorption tank, 3-negative pressure fan, 4-exhaust treatment tower, 5-variable cover, 6-partition, 7-activated carbon plate, 8-through hole, 9-connecting cover, 10-connecting flange, 11-insertion well, 12-sealing cover, 13-sealing edge, 14-waste output port. DETAILED DESCRIPTION
[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0017] See also Figure 1-5The utility model provides an activated carbon adsorption drying furnace exhaust device, comprising a primary adsorption tank 1, one side of the primary adsorption tank 1 is connected to a secondary adsorption tank 2, the other side of the secondary adsorption tank 2 is connected to a negative pressure fan 3, the other side of the negative pressure fan 3 is connected to an exhaust gas treatment tower 4, both ends of the negative pressure fan 3 are provided with a reducing cover 5, the two ends of the negative pressure fan 3 are respectively connected to the output end of the secondary adsorption tank 2 and the input end of the exhaust gas treatment tower 4 through the reducing cover 5, both sides of the primary adsorption tank 1 and the secondary adsorption tank 2 are provided with a partition 6, the first adsorption tank 1 and the secondary adsorption tank 2 are provided with an activated carbon plate 7 inside and between the two partitions 6, the first adsorption tank 1 and the secondary adsorption tank 2 are respectively provided with four activated carbon plates 7 vertically, and through holes 8 are staggered on the partition 6 and between the activated carbon plates 7.
[0018] When in use, first start the negative pressure fan 3 to form a slight negative pressure in the whole system, introduce nitrogen at a flow rate of 300-400Nm3 / h, and then introduce cracking electricity to dry the furnace. The exhaust gas generated in the drying process is first introduced into the first-level adsorption tank 1, and then introduced into the second-level adsorption tank 2. Partitions 6 are arranged inside the first-level adsorption tank 1 and the second-level adsorption tank 2, and activated carbon plates 7 are arranged between the partitions 6. Through holes 8 are opened on the partitions 6, the gas is guided to circulate back and forth inside the activated carbon plates 7, and the exhaust gas is adsorbed by the activated carbon plates 7. The first-level adsorption tank 1 and the second-level adsorption tank 2 are arranged to improve the adsorption capacity of the activated carbon plates 7 for exhaust gas. The exhaust gas that has completed the adsorption is introduced into the negative pressure fan 3, and is blown to the exhaust gas treatment tower 4 through the reducer hood 5 for final treatment.
[0019] Both ends of the primary adsorption tank 1 and the secondary adsorption tank 2 are provided with a connecting cover 9, and the outer end of the connecting cover 9 and both ends of the reducing cover 5 are provided with a connecting flange 10. The connecting cover 9, the reducing cover 5 and the negative pressure fan 3 are connected through the connecting flange 10. The inner diameter of one end of the reducing cover 5 is consistent with that of the connecting cover 9, and the inner diameter of the other end of the reducing cover 5 is consistent with that of the negative pressure fan 3. By arranging the connecting cover 9 at both ends of the primary adsorption tank 1 and the secondary adsorption tank 2, and arranging the connecting flange 10 on the connecting cover 9, the reducing cover 5 and the negative pressure fan 3, the primary adsorption tank 1, the secondary adsorption tank 2, the negative pressure fan 3 and the tail gas treatment tower 4 are connected.
[0020] An insertion well 11 is provided at the upper end of the primary adsorption tank 1 and the secondary adsorption tank 2 at a position corresponding to the activated carbon plate 7, and a sealing cover 12 is sealed and connected to the upper end of the insertion well 11 by bolts. The activated carbon plate 7 is spliced and connected to the interior of the primary adsorption tank 1 and the secondary adsorption tank 2 through the insertion well 11, which facilitates the connection between the activated carbon plate 7 and the primary adsorption tank 1 and the secondary adsorption tank 2, and a sealing cover 12 is provided on the insertion well 11 to ensure the sealing of the primary adsorption tank 1 and the secondary adsorption tank 2.
[0021] A sealing edge 13 is provided at the outer edge of the primary adsorption tank 1, the secondary adsorption tank 2 and the partition 6 at a position corresponding to the activated carbon plate 7. By providing the sealing edge 13, the sealing between the activated carbon plate 7 and the primary adsorption tank 1 and the secondary adsorption tank 2 is ensured.
[0022] A waste outlet 14 is provided on the lower wall of the primary adsorption tank 1 and the secondary adsorption tank 2 and on the outer side of the activated carbon plate 7. The waste outlet 14 is provided at the lower end of the primary adsorption tank 1 and the secondary adsorption tank 2, and waste generated during adsorption can be discharged to the outside through the waste outlet 14.
[0023] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. An activated carbon adsorption device for drying furnace tail gas, characterized in that: The invention comprises a primary adsorption tank (1), one side of the primary adsorption tank (1) is connected to a secondary adsorption tank (2), the other side of the secondary adsorption tank (2) is connected to a negative pressure fan (3), the other side of the negative pressure fan (3) is connected to an exhaust gas treatment tower (4), both ends of the negative pressure fan (3) are provided with a reducing cover (5), the two ends of the negative pressure fan (3) are respectively connected to the output end of the secondary adsorption tank (2) and the input end of the exhaust gas treatment tower (4) through the reducing cover (5), both sides of the first adsorption tank (1) and the second adsorption tank (2) are provided with a partition (6), the first adsorption tank (1) and the second adsorption tank (2) are provided with an activated carbon plate (7) inside and between two of the partitions (6), four activated carbon plates (7) are respectively vertically provided inside the first adsorption tank (1) and the second adsorption tank (2), and through holes (8) are staggeredly provided on the partition (6) and between the activated carbon plates (7).
2. The activated carbon adsorption drying furnace tail gas device according to claim 1, characterized in that: Both ends of the primary adsorption tank (1) and the secondary adsorption tank (2) are provided with a connecting hood (9), and the outer end of the connecting hood (9) and both ends of the reducing hood (5) are provided with a connecting flange (10). The connecting hood (9), the reducing hood (5) and the negative pressure fan (3) are connected to each other via the connecting flange (10), and the inner diameter of one end of the reducing hood (5) is consistent with that of the connecting hood (9), and the inner diameter of the other end of the reducing hood (5) is consistent with that of the negative pressure fan (3).
3. The activated carbon adsorption drying furnace tail gas device according to claim 1, characterized in that: An insert well (11) is provided at the upper end of the primary adsorption tank (1) and the secondary adsorption tank (2) at a position corresponding to the activated carbon plate (7), and a sealing cover (12) is sealed and connected to the upper end of the insert well (11) via bolts.
4. The activated carbon adsorption drying furnace tail gas device according to claim 1, characterized in that: A sealing edge (13) is provided at a position corresponding to the activated carbon plate (7) at the outer edges of the primary adsorption tank (1), the secondary adsorption tank (2) and the partition plate (6).
5. The activated carbon adsorption drying furnace tail gas device according to claim 1, characterized in that: A waste material outlet (14) is provided on the lower wall of the primary adsorption tank (1) and the secondary adsorption tank (2) and on the outer side of the activated carbon plate (7).