Cracking furnace tail gas emission device

Abstract

The utility model discloses a tail gas emission device of a cracking furnace, belongs to the technical field of cracking furnaces, and solves the problem that the improvement cost of the cracking furnace is higher due to the fact that a tail gas emission pipeline is directly arranged on the cracking furnace in the prior art. The device comprises a cracking furnace, a feeding port of the cracking furnace is communicated with a conveying pipe of a spiral feeding assembly, a tail gas collecting hopper is arranged at the communicating position, close to the cracking furnace, of the top of the outer wall of the conveying pipe, the large-diameter end of the tail gas collecting hopper is communicated with the conveying pipe, and the small-diameter end of the tail gas collecting hopper is communicated with external tail gas treatment equipment through a tail gas discharging pipe. The electrolyte is input into the cracking furnace through the spiral feeding assembly to be decomposed, the tail gas collecting hopper is additionally arranged on the conveying pipe of the spiral feeding assembly to discharge tail gas of the cracking furnace, and due to the arrangement of the tail gas collecting hopper, the transformation cost of the cracking furnace is reduced, and the increase of the occupied volume of the cracking furnace is avoided; meanwhile, the tail gas collecting hopper has a tail gas gathering effect and is convenient for discharging the tail gas.

Description

TECHNICAL FIELD

[0001] The utility model relates to pyrolysis furnace technical field, concretely relates to a pyrolysis furnace tail gas discharge device. BACKGROUND

[0002] With the growing demand for renewable energy storage and the rapid expansion of the electric vehicle market, the use of lithium batteries has increased significantly, followed by the generation of a large number of waste lithium batteries. In order to cope with this challenge, efficient and environmentally friendly lithium battery recycling technology becomes crucial. In the recycling process of lithium batteries, an important step is to pyrolyze waste batteries, which is usually done in a specially designed pyrolysis furnace.

[0003] In the pyrolysis process of lithium batteries, one problem that cannot be ignored is the large amount of tail gas generated during the pyrolysis process. These tail gases are complex in composition and contain a variety of pollutants, such as incompletely combusted hydrocarbons, fluorine-containing compounds, sulfides, and particulate matter. If not effectively treated and directly discharged, it will cause serious pollution to the atmospheric environment, affect air quality, and even pose a threat to human health. In the past, during the crushing and pyrolysis operation of lithium batteries, the tail gas generated by the pyrolysis device was usually directly discharged into the atmosphere through the exhaust port at the tail.

[0004] In order to recover the tail gas, the prior art usually directly sets a tail gas discharge pipeline on the pyrolysis furnace and is equipped with corresponding purification equipment to ensure that the tail gas meets the emission standards. However, the pyrolysis furnace has a large volume, and directly adding a tail gas discharge pipe to the pyrolysis furnace not only increases the occupied volume of the pyrolysis furnace, but also has high modification cost. SUMMARY

[0005] In view of the above problems in the prior art, the utility model provides a pyrolysis furnace tail gas discharge device, which solves the problem of high modification cost of the pyrolysis furnace due to the addition of a tail gas discharge pipeline on the pyrolysis furnace.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A pyrolysis furnace tail gas discharge device is provided, which includes a pyrolysis furnace, a feed inlet of the pyrolysis furnace is in communication with a feed pipe of a screw feed assembly, a tail gas collecting hopper is arranged on the top of the outer wall of the feed pipe near the communication part of the pyrolysis furnace, the large diameter end of the tail gas collecting hopper is in communication with the feed pipe, and the small diameter end of the tail gas collecting hopper is in communication with an external tail gas treatment equipment through a tail gas discharge pipe.

[0008] In this solution, the electrolyte is fed into the pyrolysis furnace for decomposition via a spiral feed assembly. The exhaust gas from the pyrolysis furnace is discharged by adding a tail gas collection hopper to the feed pipe of the spiral feed assembly. The tail gas collection hopper not only reduces the cost of pyrolysis furnace modification and avoids increasing the volume occupied by the pyrolysis furnace, but also collects the tail gas, reducing the amount of tail gas flowing out from the feed pipe, thus providing a more compact and integrated pyrolysis furnace tail gas emission solution.

[0009] Furthermore, the screw feed assembly also includes a screw blade shaft rotatably mounted in the feed pipe via a sealed bearing. One end of the screw blade shaft passes through the sealed bearing and is fixedly connected to the output end of the reducer, while the input end of the reducer is fixedly connected to the output shaft of the motor. The screw blade shaft ensures that the electrolyte can enter the pyrolysis furnace stably and continuously for processing, while maintaining the system's airtightness, preventing the leakage of harmful gases, and improving operational safety.

[0010] Furthermore, a feed hopper is installed on the conveying pipe, and the feed hopper is equipped with a feed gate. The feed gate can seal the feed end of the conveying pipe, ensuring the airtightness of the entire device.

[0011] Furthermore, the pyrolysis furnace is mounted on a fixed support, and a discharge pipe is installed on the end of the pyrolysis furnace away from the feed inlet. The discharge pipe facilitates the output of waste materials.

[0012] Furthermore, the pyrolysis furnace has an internal furnace body connected to the feed pipe via a sealing flange, and a sealing gate is installed at the feed inlet of the furnace body. By using a sealing flange to connect the furnace body and the feed pipe, and configuring a sealing gate at the feed inlet, the sealing performance of the system is enhanced, reducing the heat loss of the electrolyte during high-temperature decomposition.

[0013] Furthermore, insulation layers are installed on the outer walls of both the feed pipe and the exhaust gas collection hopper. These insulation layers reduce heat loss, maintain a suitable operating temperature, ensure the smooth progress of the pyrolysis reaction, and also save energy.

[0014] Furthermore, the exhaust gas collection hopper is sealed to the exhaust gas emission pipe via a ceramic fiber sealing ring. Using a ceramic fiber sealing ring to connect the exhaust gas collection hopper and the exhaust gas emission pipe provides excellent sealing, withstands high-temperature and high-pressure operating conditions, extends equipment lifespan, and reduces maintenance costs.

[0015] Furthermore, an exhaust gas chamber is provided at the connection point between the outer wall of the conveying pipe and the exhaust gas collection hopper, protruding upwards. The exhaust gas chamber helps to concentrate and collect the generated exhaust gas, increasing the exhaust gas capture efficiency, and at the same time providing a smoother channel for exhaust gas emission.

[0016] Furthermore, the exhaust gas chamber is rectangular in shape.

[0017] Furthermore, the exhaust gas collection hopper is equipped with wireless temperature and pressure sensors. These sensors facilitate real-time monitoring of exhaust gas parameters, helping operators to view these parameters.

[0018] This utility model discloses a pyrolysis furnace tail gas emission device, the beneficial effects of which are:

[0019] This invention feeds the electrolyte into the pyrolysis furnace through a spiral feed assembly for decomposition. The tail gas of the pyrolysis furnace is discharged by adding a tail gas collection hopper to the feed pipe of the spiral feed assembly. The tail gas collection hopper not only reduces the cost of pyrolysis furnace modification and avoids increasing the volume occupied by the pyrolysis furnace, but also collects the tail gas, making it easier to discharge. Attached Figure Description

[0020] Figure 1 A schematic diagram of the pyrolysis furnace tail gas emission device;

[0021] The components are: 1. pyrolysis furnace; 11. furnace body; 12. discharge pipe; 2. spiral feed assembly; 21. motor; 22. reducer; 23. spiral blade shaft; 24. conveying pipe; 25. tail gas chamber; 3. tail gas collection hopper; 4. tail gas emission pipe. Detailed Implementation

[0022] The specific embodiments of this utility model are described below to enable those skilled in the art to understand this utility model. However, it should be understood that this utility model is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of this utility model as defined and determined by the appended claims, these changes are obvious. All utility model creations utilizing the concept of this utility model are within the scope of protection.

[0023] refer to Figure 1 This embodiment provides a pyrolysis furnace exhaust gas device, including a pyrolysis furnace 1 and a spiral feed assembly 2.

[0024] The pyrolysis furnace 1 is mounted on a fixed support. A discharge pipe 12 is installed on the end of the pyrolysis furnace 1 furthest from the feed inlet. Inside the pyrolysis furnace 1, a furnace body 11 is connected to a conveying pipe 24 via a sealing flange. A sealing gate is installed at the feed inlet of the furnace body 11. By using a sealing flange to connect the furnace body 11 and the conveying pipe 24, and by configuring a sealing gate at the feed inlet, the sealing performance of the system is enhanced, reducing temperature loss of the electrolyte during high-temperature decomposition. The pyrolysis furnace 1 is prior art; therefore, its internal structure will not be described in detail.

[0025] The spiral feed assembly 2 includes a feed pipe 24 connected to the furnace body 11. A tail gas collection hopper 3 is located on the top of the outer wall of the feed pipe 24 near the connection point to the pyrolysis furnace 1. The large-diameter end of the tail gas collection hopper 3 is connected to the feed pipe 24, and the small-diameter end of the tail gas collection hopper 3 is connected to external tail gas treatment equipment via a tail gas discharge pipe 4. Both the feed pipe 24 and the tail gas collection hopper 3 are equipped with insulation layers on their outer walls. These insulation layers reduce heat loss, maintain a suitable operating temperature, ensure the smooth progress of the pyrolysis reaction, and also save energy.

[0026] In this implementation, the exhaust gas treatment equipment is existing technology, so its specific working principle and connection relationship will not be described in detail.

[0027] A spiral blade shaft 23 is rotatably mounted inside the feed pipe 24 via a sealed bearing. One end of the spiral blade shaft 23 passes through the sealed bearing and is fixedly connected to the output end of the reducer 22. The input end of the reducer 22 is fixedly connected to the output shaft of the motor 21. The spiral blade shaft 23 ensures that the electrolyte can enter the cracking furnace 1 stably and continuously for processing, while maintaining the system's airtightness, preventing the leakage of harmful gases, and improving operational safety.

[0028] The conveying pipe 24 is also equipped with a feed hopper, which has a feed gate. The feed gate can seal the feed end of the conveying pipe to ensure the airtightness of the entire device.

[0029] Specifically, in this embodiment, the exhaust gas collection hopper 3 is sealed to the exhaust gas emission pipe 4 via a ceramic fiber sealing ring. Using a ceramic fiber sealing ring to connect the exhaust gas collection hopper 3 and the exhaust gas emission pipe 4 provides a good sealing effect, can withstand high temperature and high pressure working conditions, extends the service life of the equipment, and reduces maintenance costs. Furthermore, the exhaust gas collection hopper 3 is equipped with wireless temperature and pressure sensors. These sensors facilitate real-time monitoring of exhaust gas parameters, helping operators to view these parameters.

[0030] As a further embodiment, an exhaust gas chamber 25 is provided at the connection between the outer wall of the conveying pipe 24 and the exhaust gas collection hopper 3, protruding upwards. The chamber of the exhaust gas chamber 25 is rectangular. The exhaust gas chamber 25 helps to collect the generated exhaust gas in a concentrated manner, improving the exhaust gas capture efficiency, and at the same time providing a smoother channel for exhaust gas emission.

[0031] In summary, the beneficial effects of this solution are as follows:

[0032] The exhaust gas of the pyrolysis furnace 1 is discharged by adding an exhaust gas collection hopper 3 to the conveying pipe 24 of the spiral feed assembly 2. The exhaust gas collection hopper 3 not only reduces the cost of modifying the pyrolysis furnace 1 and avoids increasing the volume occupied by the pyrolysis furnace 1, but also collects the exhaust gas and reduces the exhaust gas flowing out of the conveying pipe 24, providing a more compact and integrated exhaust gas emission solution for the pyrolysis furnace 1.

[0033] Although the specific embodiments of the utility model have been described in detail with reference to the accompanying drawings, this should not be construed as limiting the scope of protection of this patent. Various modifications and variations that can be made by those skilled in the art without inventive effort within the scope described in the claims still fall within the scope of protection of this patent.

Claims

1. A pyrolysis furnace tail gas emission device, characterized in that, The equipment includes a pyrolysis furnace (1), the feed inlet of which is connected to the conveying pipe (24) of the spiral feed assembly (2), and a tail gas collection hopper (3) is provided on the top of the outer wall of the conveying pipe (24) near the connection point of the pyrolysis furnace (1). The large diameter end of the tail gas collection hopper (3) is connected to the conveying pipe (24), and the small diameter end of the tail gas collection hopper (3) is connected to an external tail gas treatment device through a tail gas discharge pipe (4).

2. The pyrolysis furnace tail gas emission device according to claim 1, characterized in that, The spiral feeding assembly (2) also includes a spiral blade shaft (23) that is rotatably disposed in the feed pipe (24) via a sealed bearing. One end of the spiral blade shaft (23) passes through the sealed bearing and is fixedly connected to the output end of the reducer (22). The input end of the reducer (22) is fixedly connected to the output shaft of the motor (21).

3. The pyrolysis furnace tail gas emission device according to claim 2, characterized in that, The material conveying pipe (24) is also equipped with a feeding hopper, and the feeding hopper is equipped with a feeding gate.

4. The pyrolysis furnace tail gas emission device according to claim 1, characterized in that, The pyrolysis furnace (1) is installed on a fixed support, and a discharge pipe (12) is provided on the end of the pyrolysis furnace (1) away from the feed port.

5. The pyrolysis furnace tail gas emission device according to claim 4, characterized in that, The pyrolysis furnace (1) has a furnace body (11) connected to the feed pipe (24) via a sealing flange inside, and a sealing gate is provided at the feed inlet of the furnace body (11).

6. The pyrolysis furnace tail gas emission device according to claim 5, characterized in that, Both the material conveying pipe (24) and the exhaust gas collection hopper (3) are provided with a heat insulation layer on their outer walls.

7. The pyrolysis furnace tail gas emission device according to claim 1, characterized in that, The exhaust gas collection hopper (3) is sealed to the exhaust gas discharge pipe (4) by a ceramic fiber sealing ring.

8. The pyrolysis furnace tail gas emission device according to claim 1, characterized in that, The outer wall of the conveying pipe (24) is connected to the tail gas collection hopper (3) and a tail gas chamber (25) is provided in an upward protrusion.

9. The pyrolysis furnace tail gas emission device according to claim 8, characterized in that, The exhaust gas chamber (25) has a rectangular parallelepiped shape.

10. The pyrolysis furnace tail gas emission device according to claim 1, characterized in that, The exhaust gas collection hopper (3) is equipped with a wireless temperature sensor and a wireless pressure sensor.

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