High-temperature thermal cracking system

Abstract

The utility model discloses a high-temperature thermal cracking system which comprises a first fresh air filter, a first fan, an air heater, a cracking tower, a cyclone separator, a metal film filter and a second fan which are sequentially communicated through a pipeline, the outlet end of the second fan is connected with a discharge header pipe, and the discharge header pipe is connected with a smoke discharge pipe and a circulating pipe. The circulating pipe is connected with a pipeline between the first fan and the first fresh air filter; a feeding hole is formed in the top of the cracking tower, the feeding hole is connected with an atomizing device through a pipeline, and the atomizing device is connected with a solution pump through a liquid inlet pipe and is connected with a feeding pump through a feeding pipe. The cracked gas enters the cyclone separator to be separated again, the gas separated by the cyclone separator enters the metal film filter again, high-precision filtration is completed in the metal film filter, and the filtered gas is circulated again through the second fan and is introduced into the cracking tower under the action of the first fan, so that full cracking is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of pyrolysis, in particular to a high-temperature pyrolysis system. Background Art

[0002] The pyrolysis method is to place the crushed waste board and edge materials in a closed container, and under certain temperature and pressure, part of the non-metallic materials are converted into oil and gas, and the metal flakes are recovered. However, the current pyrolysis system has the following problems: there may still be solid particles in the pyrolyzed gas, and if it is directly discharged without fine filtration or repeated pyrolysis, it will pollute the atmosphere. Content of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the utility model provides a high-temperature pyrolysis system to solve the problems mentioned in the above background art.

[0004] To solve the above technical problems, the utility model provides the following technical solutions:

[0005] A high-temperature pyrolysis system includes a first fresh air filter, a first fan, an air heater, a pyrolysis tower, a cyclone separator, a metal membrane filter, and a second fan connected in sequence through pipelines. The outlet end of the second fan is connected to a discharge main pipe, and a smoke exhaust pipe and a circulation pipe are connected to the discharge main pipe. The circulation pipe is connected to the pipeline between the first fan and the first fresh air filter; the top of the pyrolysis tower is provided with a feed inlet, the feed inlet is connected to an atomizing device through a pipeline, the atomizing device is connected to a solution pump through a liquid inlet pipe, and is connected to a feed pump through a feed pipe.

[0006] Preferably, a first fresh air valve is connected to the pipeline near the first fresh air filter.

[0007] Preferably, a pressure sensor, an oxygen sensor, and a circulation air valve are sequentially connected to the circulation pipe.

[0008] Preferably, an air flow meter is connected to the pipeline between the air heater and the pyrolysis tower.

[0009] Preferably, an exhaust air valve is connected to the smoke exhaust pipe.

[0010] Preferably, a third fan is further provided on one side of the pyrolysis tower. The inlet end of the third fan is connected to a second fresh air filter through a pipeline, a second fresh air valve is connected to the pipeline between the third fan and the second fresh air filter, and the outlet end of the third fan is connected to the pipeline between the pyrolysis tower and the second fan.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] The material enters the atomization device together with compressed air, is pressurized and atomized to form particles, and then enters the cracking tower in the hot air atmosphere, and is rapidly cracked in the cracking tower. Most of the material falls to the bottom of the cracking tower. There is an exhaust port in the middle and lower part of the cracking tower. The air flow flows out of the exhaust port and enters the cyclone separator for further separation. The gas separated by the cyclone separator enters the metal membrane filter again, and high-precision filtration is completed in the metal membrane filter. After the filtration is completed, the gas is recycled through the second fan again, and under the action of the first fan, it is introduced into the cracking tower to achieve sufficient cracking. Description of the Drawings

[0013] Figure 1 is a structural schematic diagram of the present invention;

[0014] In the figure: 1 - First fresh air filter, 2 - First fan, 3 - Air heater, 4 - Cracking tower, 5 - Cyclone separator, 6 - Metal membrane filter, 7 - Second fan, 8 - Discharge main pipe, 9 - Smoke exhaust pipe, 10 - Circulation pipe, 11 - Atomization device, 12 - Solution pump, 13 - Feed pump, 14 - First fresh air valve, 15 - Pressure sensor, 16 - Oxygen sensor, 17 - Circulation air valve, 18 - Air flow meter, 19 - Exhaust air valve, 20 - Third fan, 21 - Second fresh air filter, 22 - Second fresh air valve. Specific Embodiments

[0015] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0016] Embodiment 1

[0017] Please refer to Figure 1 , a high-temperature pyrolysis system, including a first fresh air filter 1, a first fan 2, an air heater 3, a cracking tower 4, a cyclone separator 5, a metal membrane filter 6, and a second fan 7 that are sequentially connected through pipelines. The outlet end of the second fan 7 is connected to a discharge main pipe 8. A smoke exhaust pipe 9 and a circulation pipe 10 are connected to the discharge main pipe 8. An exhaust air valve 19 is connected to the smoke exhaust pipe 9. The circulation pipe 10 is connected to the pipeline between the first fan 2 and the first fresh air filter 1. A pressure sensor 15, an oxygen sensor 16, and a circulation air valve 17 are sequentially connected to the circulation pipe 10.

[0018] The top of the cracking tower 4 is provided with a feed inlet, which is connected to an atomizing device 11 through a pipeline. The atomizing device 11 is connected to a solution pump 12 through a liquid inlet pipe and to a feed pump 13 through a feed pipe. In addition, the atomizing device is also connected to an air compression device. When the system works, the material passes through the feed pump, and the solution passes through the solution pump and enters the atomizing device 11 together with compressed air. After being pressurized and atomized into particles with a size of 10 - 50 μm, it enters the cracking tower in the atmosphere of hot air.

[0019] A first fresh air valve 14 is connected to the pipeline near the first fresh air filter 1. An air flowmeter 18 is connected to the pipeline between the air heater 3 and the cracking tower 4, which is used to measure the flow rate of the air entering the cracking tower.

[0020] The working principle of the present utility model is as follows:

[0021] (1) System preheating:

[0022] The first fresh air valve 14 is opened, and the first fan 2 starts to suck in air. The air flowmeter 18 starts to measure the amount of air. When the air volume corresponding to 30 Hz is reached, the air heater 3 starts to work. There is a dry - burning prevention device in the air heater 3, with a dry - burning prevention temperature of 650 degrees and a set temperature of 600 degrees at the hot air outlet. The 60 - KW heater on the furnace surface starts to heat up to the set temperature. The fan adjusts its speed according to the pressure change to maintain a constant pressure until the furnace temperature reaches 450 degrees (controlled by the furnace temperature measurement point). At this time, it is determined that the system preheating is completed according to the temperatures of each point.

[0023] (2) System startup and operation:

[0024] When the system works, the material passes through the feed pump 13, and the solution passes through the solution pump 12 and enters the atomizing device 11 together with compressed air. After being pressurized and atomized into particles with a size of 10 - 50 μm, it enters the cracking tower 4 in the atmosphere of hot air. It rapidly cracks in the cracking tower 4. Most of the material falls to the bottom of the cracking tower 4 (the bottom is equipped with a double - layer ash discharge valve - double motors). There is an exhaust port in the middle - lower part of the cracking tower 4, and the airflow flows out from the exhaust port and enters the cyclone separator 5 for further separation (the bottom is equipped with a double - layer ash discharge valve - double motors). The gas separated by the cyclone separator 5 enters the metal membrane filter 6 again. High - precision filtration is completed in the metal membrane filter 6. After filtration, the gas is recycled through the second fan 7 to achieve sufficient cracking. When the cracking is completed, the exhaust valve 19 is opened to discharge the gas.

[0025] Embodiment 2

[0026] On the basis of Embodiment 1, a third blower 20 is further provided on one side of the cracking tower 4. The inlet end of the third blower 20 is connected with a second fresh air filter 21 through a pipeline. A second fresh air valve 22 is connected to the pipeline between the third blower 20 and the second fresh air filter 21. The outlet end of the third blower 20 is connected to the pipeline between the cracking tower 4 and the second blower 7. Fresh air is input into the gas discharged from the cracking tower 6 through the third blower 20, so as to dilute the gas and send the diluted gas into the cracking tower 6 again.

[0027] It should be noted that the term "comprising", "including" or any other variant thereof is intended to cover a non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0028] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high temperature thermal cracking system, characterized in that: The invention comprises a first fresh air filter (1), a first fan (2), an air heater (3), a cracking tower (4), a cyclone separator (5), a metal membrane filter (6), and a second fan (7) which are sequentially connected through pipelines, wherein the outlet end of the second fan (7) is connected to a discharge main pipe (8), a smoke exhaust pipe (9) and a circulation pipe (10) are connected to the discharge main pipe (8), and the circulation pipe (10) is connected to the pipeline between the first fan (2) and the first fresh air filter (1); a feed port is provided at the top of the cracking tower (4), the feed port is connected to an atomizing device (11) through a pipeline, the atomizing device (11) is connected to a solution pump (12) through a liquid inlet pipe, and is connected to a feed pump (13) through a feed pipe.

2. A high temperature thermal cracking system according to claim 1, characterized in that: A first fresh air valve (14) is connected to the pipeline close to the first fresh air filter (1).

3. A high temperature thermal cracking system according to claim 2, characterized in that: The circulation pipe (10) is sequentially connected to a pressure sensor (15), an oxygen sensor (16) and a circulation air valve (17).

4. A high temperature thermal cracking system according to claim 3, characterized in that: An air flow meter (18) is connected to the pipeline between the air heater (3) and the cracking tower (4).

5. A high temperature thermal cracking system according to claim 4, characterized in that: The smoke exhaust pipe (9) is connected to an exhaust valve (19).

6. A high temperature thermal cracking system according to claim 5, characterized in that: A third fan (20) is also provided on one side of the cracking tower (4); an inlet end of the third fan (20) is connected to a second fresh air filter (21) via a pipeline; a second fresh air valve (22) is connected to the pipeline between the third fan (20) and the second fresh air filter (21); and an outlet end of the third fan (20) is connected to a pipeline between the cracking tower (4) and the second fan (7).

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