阅读说明：本技术 新型连续化热裂解反应系统及其处理方法 (Novel continuous thermal cracking reaction system and treatment method thereof ) 是由 杨殿才 徐金光 黄群星 严建华 于 2020-05-25 设计创作，主要内容包括：本发明提出一种新型连续化热裂解反应系统及其处理方法,属于废弃物资源化利用领域。该系统包括依次设置的反应原料进料装置、与所述反应原料进料装置出料口连通的三级连续梯级热解装置和与所述三级连续梯级热解装置烟气出口连通的烟气净化装置。其中,三级连续梯级热解装置包括第一热解反应器、与所述第一热解反应器出料口(I)连通的第二热解反应器和与所述第二热解反应器出料口(II)连通的第三热解反应器。该处理方法主要包括：(1)原料进料步骤；(2)热裂解反应步骤；(3)烟气处理步骤；(4)热油气冷凝冷却处理步骤；(5)热解气循环利用步骤。利用本发明的反应系统及其处理方法能够制备得到杂质少、品质佳的炭黑或生物炭产品。(The invention provides a novel continuous thermal cracking reaction system and a treatment method thereof, belonging to the field of waste resource utilization. The system comprises a reaction raw material feeding device, a three-stage continuous step pyrolysis device and a flue gas purification device, wherein the reaction raw material feeding device, the three-stage continuous step pyrolysis device and the flue gas purification device are sequentially arranged, and the three-stage continuous step pyrolysis device is communicated with a discharge hole of the reaction raw material feeding device. The three-stage continuous cascade pyrolysis device comprises a first pyrolysis reactor, a second pyrolysis reactor communicated with a discharge port (I) of the first pyrolysis reactor, and a third pyrolysis reactor communicated with a discharge port (II) of the second pyrolysis reactor. The processing method mainly comprises the following steps: (1) a raw material feeding step; (2) a thermal cracking reaction step; (3) a flue gas treatment step; (4) a step of condensing and cooling hot oil gas; (5) and recycling the pyrolysis gas. The carbon black or biochar product with less impurities and good quality can be prepared by utilizing the reaction system and the treatment method thereof.)

1. The novel continuous thermal cracking reaction system is characterized by comprising a reaction raw material feeding device, a three-stage continuous step pyrolysis device and a flue gas purification device (19), wherein the reaction raw material feeding device, the three-stage continuous step pyrolysis device and the flue gas purification device are sequentially arranged, and the three-stage continuous step pyrolysis device is communicated with a discharge hole (4) of the reaction raw material feeding device;

the three-stage continuous cascade pyrolysis device comprises a first pyrolysis reactor, a second pyrolysis reactor communicated with discharge ports (I) (8) of the first pyrolysis reactor, and a third pyrolysis reactor communicated with discharge ports (II) (12) of the second pyrolysis reactor.

2. The system according to claim 1, wherein the reaction raw material feeding device comprises a spiral feeding unit (2), a spiral cavity-free unit (3) and a raw material discharging port which are arranged from left to right in sequence;

a raw material feeding hole is formed in the top of the spiral feeding unit (2); the spiral feeding unit (2) is internally provided with a spiral shaft and a spiral blade and used for pushing the reaction raw materials to one side of the raw material discharge hole.

3. The system according to claim 1, wherein the first pyrolysis reactor comprises a first heating cavity (6) and a first gas-solid two-phase discharging machine (7) which are arranged from left to right in sequence;

the second pyrolysis reactor comprises a first solid-phase feeder (9), a second heating cavity (10) and a second gas-solid two-phase discharging machine (11) which are sequentially arranged from left to right;

the third pyrolysis reactor comprises a second solid-phase feeder (13), a cooling cavity (14) and a third gas-solid two-phase discharging machine (15) which are sequentially arranged from left to right, and a third pyrolysis reactor discharging hole (III) (16) is further formed in the third pyrolysis reactor.

4. The system according to claim 3, wherein the first pyrolysis reactor discharge port (I) (8), the second pyrolysis reactor discharge port (II) (12) and the third pyrolysis reactor discharge port (III) (16) are respectively arranged at the bottom of the first gas-solid two-phase discharging machine (7), the bottom of the second gas-solid two-phase discharging machine (11) and the bottom of the third gas-solid two-phase discharging machine (15).

5. The system according to claim 4, wherein the first pyrolysis reactor outlet (I) (8) is in communication with a first solid phase feeder (9) and the second pyrolysis reactor outlet (II) (12) is in communication with a second solid phase feeder (13).

6. The system according to claim 3 or 4, wherein pyrolysis oil gas outlets (20-1, 20-2, 20-3) are arranged on the first gas-solid two-phase discharging machine (7), the second gas-solid two-phase discharging machine (11) and the third gas-solid two-phase discharging machine (15);

a spiral shaft and spiral blades are further arranged in the first gas-solid two-phase discharging machine (7), the second gas-solid two-phase discharging machine (11) and the third gas-solid two-phase discharging machine (15) and are used for respectively pushing the reaction raw materials to one side of the first heating cavity (6), one side of the second heating cavity (10) and one side of the cooling cavity (14);

spiral blades are not arranged on the spiral shafts of the second gas-solid two-phase discharging machine (11) and the third gas-solid two-phase discharging machine (15) which respectively correspond to the first solid-phase feeding machine (9) and the second solid-phase feeding machine (13).

7. The system of claim 6, further comprising an oil and gas condensate cooling device (22) in communication with the pyrolysis oil and gas outlets (20-1, 20-2, 20-3), a pyrolysis gas recycling device for providing thermal energy to the first and second pyrolysis reactors, and a pyrolysis char treatment device in communication with the third pyrolysis reactor outlet (III) (16).

8. A novel continuous thermal cracking treatment method is characterized by comprising the following steps:

a raw material feeding step of adding reaction raw materials into a feeding device of the thermal cracking reaction system;

a thermal cracking reaction step, namely adding the reaction raw materials into the feeding device, and then feeding the reaction raw materials into a thermal cracking device to perform three-stage continuous cascade thermal cracking reaction to finally obtain a pyrolysis product;

a flue gas treatment step, wherein the flue gas generated in the thermal cracking reaction step of the reaction raw material is treated and discharged after reaching the standard;

a step of condensation and cooling treatment of hot oil gas, in which the hot oil gas generated in the step of thermal cracking reaction of the reaction raw material is cooled, and condensed oil is obtained and then recovered;

and a pyrolysis gas recycling step, namely recycling the pyrolysis gas generated in the thermal cracking reaction step of the reaction raw material to provide heat energy for the thermal cracking reaction step.

9. The process of claim 8, wherein three consecutive thermal cracking steps in said thermal cracking step comprise: a first-stage pyrolysis reaction, a second-stage pyrolysis reaction and a third-stage pyrolysis reaction;

wherein the reaction conditions of the first-stage pyrolysis reaction, the second-stage pyrolysis reaction and the third-stage pyrolysis reaction are respectively 150-180 ℃, 50-5 kPa, 380-450 ℃, 50-5 kPa and 150-200 ℃, 50-5 kPa.

10. The system or process of any of claims 1-9, wherein the reaction feedstock is scrap tires or rubber waste products.

Technical Field

The invention belongs to the field of waste resource utilization, and particularly relates to a novel continuous thermal cracking reaction system and a treatment method thereof.

Background

With the development of global economy, the vigorous development of the automobile and rubber-plastic industry is driven, a large amount of waste rubber-plastic solid wastes are generated every year, and particularly, waste tires are more prominent. However, the natural degradation time of the waste tires exceeds 400 years, and if proper treatment methods are not adopted or the waste tires are recycled, not only is the resource waste caused, but also the land and the ecological environment are greatly damaged. The main raw material rubber (including natural rubber and synthetic rubber) of the waste tire is hydrocarbon polymer, which contains about 88% of carbon component, and the carbon black in the tire formula accounts for about 30-40% of the total mass of the tire and is 99% of pure carbon, so that the carbon content in the waste tire is extremely high and is about twice of that of coal.

At present, thermal cracking is generally considered in the industry as a final means for recycling waste tires, so that not only is the ecological problem effectively solved, but also the full components of the waste tires can be recycled. However, the conventional single-stage continuous thermal cracking method has the defects of uncontrollable reaction process, complex components of thermal cracking products, low flash point, poor quality and the like, so that the development of a novel thermal cracking reaction system with high efficiency and high quality of the thermal cracking products is an urgent issue to be solved by those skilled in the art.

Disclosure of Invention

The invention provides a novel continuous thermal cracking reaction system with controllable reaction process and high quality of thermal cracking reaction products and a treatment method thereof, aiming at the technical problems of uncontrollable reaction process, mixed components of thermal cracking products, low flash point, poor quality and the like of a single-stage continuous thermal cracking method in the prior art.

In order to achieve the purpose, the invention adopts the technical scheme that:

a novel continuous thermal cracking reaction system comprises a reaction raw material feeding device, a three-stage continuous step pyrolysis device and a flue gas purification device, wherein the three-stage continuous step pyrolysis device is communicated with a discharge hole of the reaction raw material feeding device, and the flue gas purification device is communicated with a flue gas outlet of the three-stage continuous step pyrolysis device;

the three-stage continuous cascade pyrolysis device comprises a first pyrolysis reactor, a second pyrolysis reactor communicated with a discharge port (I) of the first pyrolysis reactor, and a third pyrolysis reactor communicated with a discharge port (II) of the second pyrolysis reactor.

Preferably, the reaction raw material feeding device comprises a spiral feeding unit, a spiral cavity-free unit and a raw material discharging port which are sequentially arranged from left to right;

a raw material feeding hole is formed in the top of the spiral feeding unit; and a spiral shaft and spiral blades are arranged in the spiral feeding unit and used for pushing the reaction raw materials to one side of the raw material discharge hole.

Preferably, the first pyrolysis reactor comprises a first heating cavity and a first gas-solid two-phase discharging machine which are sequentially arranged from left to right;

the second pyrolysis reactor comprises a first solid-phase feeder, a second heating cavity and a second gas-solid two-phase discharging machine which are sequentially arranged from left to right;

the third pyrolysis reactor comprises a second solid-phase feeder, a cooling cavity and a third gas-solid two-phase discharging machine which are sequentially arranged from left to right, and a third pyrolysis reactor discharging hole (III) is further formed in the third pyrolysis reactor.

Preferably, the discharge port (I) of the first pyrolysis reactor, the discharge port (II) of the second pyrolysis reactor and the discharge port (III) of the third pyrolysis reactor are respectively arranged at the bottom of the first gas-solid two-phase discharger, the bottom of the second gas-solid two-phase discharger and the bottom of the third gas-solid two-phase discharger.

Preferably, the first pyrolysis reactor discharge port (I) is communicated with a first solid-phase feeder, and the second pyrolysis reactor discharge port (II) is communicated with a second solid-phase feeder.

Preferably, pyrolysis oil gas outlets are formed in the first gas-solid two-phase discharging machine, the second gas-solid two-phase discharging machine and the third gas-solid two-phase discharging machine;

a spiral shaft and spiral blades are further arranged in the first gas-solid two-phase discharging machine, the second gas-solid two-phase discharging machine and the third gas-solid two-phase discharging machine and are used for respectively pushing the reaction raw materials to one side of the first heating cavity, one side of the second heating cavity and one side of the cooling cavity;

and spiral blades are not arranged on the spiral shafts of the second gas-solid two-phase discharging machine and the third gas-solid two-phase discharging machine which respectively correspond to the first solid-phase feeding machine and the second solid-phase feeding machine.

Preferably, the system further comprises an oil gas condensation cooling device communicated with the pyrolysis oil gas outlet, a pyrolysis gas recycling device used for providing heat energy for the first pyrolysis reactor and the second pyrolysis reactor, and a pyrolysis carbon treatment device communicated with a discharge port (III) of the third pyrolysis reactor.

A novel continuous thermal cracking process, comprising the steps of:

a raw material feeding step of adding reaction raw materials into a feeding device of the thermal cracking reaction system;

a thermal cracking reaction step, namely adding the reaction raw materials into the feeding device, and then feeding the reaction raw materials into a thermal cracking device to perform three-stage continuous cascade thermal cracking reaction to finally obtain a pyrolysis product;

a flue gas treatment step, wherein the flue gas generated in the thermal cracking reaction step of the reaction raw material is treated and discharged after reaching the standard;

a step of condensation and cooling treatment of hot oil gas, in which the hot oil gas generated in the step of thermal cracking reaction of the reaction raw material is cooled, and condensed oil is obtained and then recovered;

and a pyrolysis gas recycling step, namely recycling the pyrolysis gas generated in the thermal cracking reaction step of the reaction raw material to provide heat energy for the thermal cracking reaction step.

Preferably, the three-stage continuous cascade thermal cracking reaction in the thermal cracking reaction step includes: a first-stage pyrolysis reaction, a second-stage pyrolysis reaction and a third-stage pyrolysis reaction;

wherein the reaction conditions of the first-stage pyrolysis reaction, the second-stage pyrolysis reaction and the third-stage pyrolysis reaction are respectively 150-180 ℃, 50-5 kPa, 380-450 ℃, 50-5 kPa and 150-200 ℃, 50-5 kPa.

Preferably, the reaction raw material is waste tires or waste rubber products.

Compared with the prior art, the invention has the advantages and positive effects that:

1. the invention provides a novel continuous thermal cracking reaction system and a treatment method thereof, wherein three stages of continuous cascade pyrolysis reactions are arranged, three pyrolysis processes of waste tires are respectively and independently arranged into reaction sections, and the temperatures are respectively and independently controlled, so that the reaction target is clear, the heat energy consumption is lower, the reaction is more sufficient, and the reaction product has the advantages of less impurities, high quality and the like; in addition, the pyrolysis reactor selected by the invention is a liner-free rotary reactor, so that the reaction temperature field is more uniformly distributed compared with other fixed bed reactors, and the coking phenomenon caused by using a single temperature in other reactors is avoided;

2. the novel continuous thermal cracking reaction system and the treatment method thereof provided by the invention can save energy consumption, for example, the comprehensive energy consumption is 156kWh when 1t of waste tires are treated, and the energy is saved by more than 20% compared with other cracking technologies in the industry;

3. the reaction product produced by the novel continuous thermal cracking reaction system and the treatment method thereof provided by the invention has higher quality, and 0.4t of pyrolysis oil, 0.35t of pyrolysis carbon, 0.15t of steel wire and 0.1t of gas can be produced when 1t of waste tire is treated;

approximately the same product distribution as other technologies. However, performance tests and practice verification show that the pyrolytic carbon produced by the technical scheme can be reused in tire manufacturing, and can replace carbon black with the specification of N660 in a large proportion or completely, the pyrolytic carbon produced by other cracking technologies can only be used in industries with lower requirements on carbon black, such as rubber tubes, adhesive tapes, printing ink and the like, and the market value of the pyrolytic carbon is only one third of that of products produced by the technical scheme at most.

Drawings

FIG. 1 is a diagram of an overall apparatus of a novel continuous thermal cracking reaction system according to an embodiment of the present invention;

fig. 2 is an apparatus diagram of a first pyrolysis reactor provided in an embodiment of the present invention.

In the above figures: the reaction raw material feeding device comprises: 1. a colloidal particle conveyor belt; 2. a screw feed unit; 3. a non-helical cavity cell; 4. a discharge hole of the reaction raw material feeding device; 5-1, 5-2, 5-3, 5-4, 5-5, 5-6 and a mechanical sealing structure; the three-stage continuous step pyrolysis device comprises: 6. a first heating chamber; 7. a first gas-solid two-phase discharging machine; 8. a discharge port (I) of the first pyrolysis reactor; 9. a first solid phase feeder; 10. a second heating cavity; 11. a second gas-solid two-phase discharging machine; 12. a discharge hole (II) of the second pyrolysis reactor; 13. a second solid phase feeder; 14. a cooling chamber; 15. a third gas-solid two-phase discharging machine; 16. a discharge hole (III) of the third pyrolysis reactor; 17-1, 17-2 and a flue gas outlet; 18-1, 18-2, a flue gas pipeline; 19. a flue gas purification device; 20-1, 20-2 and 20-3 of pyrolysis oil gas outlet; 21-2, 21-3, pyrolysis oil gas pipeline; 22. an oil gas condensation cooling device; 23. the pyrolysis oil is sent to a refining pipeline; pyrolysis gas cyclic utilization device includes: 24-1, 24-2, hot flue gas lines; 25. a gas pipeline; 26. heating furnace; the pyrolytic carbon treatment device comprises: 27. a pyrolytic carbon spiral feeder; 28. a magnetic separator; 29. a pyrolytic carbon pneumatic conveying device; 30. removing the pyrolytic carbon from the modified granulation pipeline; 31-1, 31-2 and a cooling water pipeline.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The embodiment of the invention provides a novel continuous thermal cracking reaction system, which comprises a reaction raw material feeding device, a three-stage continuous step pyrolysis device and a flue gas purification device 19, wherein the three-stage continuous step pyrolysis device is communicated with a discharge hole 4 of the reaction raw material feeding device, and the flue gas purification device is communicated with flue gas outlets 17-1 and 17-2 of the three-stage continuous step pyrolysis device;

the three-stage continuous cascade pyrolysis device comprises a first pyrolysis reactor, a second pyrolysis reactor communicated with a discharge port (I)8 of the first pyrolysis reactor, and a third pyrolysis reactor communicated with a discharge port (II)12 of the second pyrolysis reactor.

The system selected by the invention has the characteristics that three stages of continuous cascade pyrolysis reactions are arranged, the three pyrolysis processes of the waste tire are respectively and independently arranged in the reaction section, and the temperature is respectively and independently controlled, so that the reaction target is clear, the heat energy consumption is lower, the reaction is more sufficient, and the quality of the reaction product is higher. In addition, by selecting the liner-free rotary reactor, compared with other fixed bed reactors, the reaction temperature field distribution is more uniform, and the coking phenomenon caused by using a single temperature in other reactors can be avoided.

In a preferred embodiment, the reaction raw material feeding device comprises a spiral feeding unit 2, a spiral cavity-free unit 3 and a raw material discharging port which are arranged from left to right in sequence;

a raw material feeding hole is formed in the top of the spiral feeding unit 2; the spiral feeding unit 2 is internally provided with a spiral shaft and a spiral blade and used for pushing the reaction raw materials to one side of the raw material discharge hole.

In the above preferred embodiment, the junked tire crumb is conveyed to the screw feeding unit 2 of the reaction raw material feeding device, and under the action of the screw shaft and the screw blade, the crumb material enters the non-screw cavity unit 3 again to form local stacking. The purpose of the spiral-free cavity unit 3 here is to: because the unit is an oxygen-insulated self-sealing structure, the reaction system can be ensured to be in an oxygen-insulated state so as to ensure the safe operation of the whole system.

In a preferred embodiment, the first pyrolysis reactor comprises a first heating cavity 6 and a first gas-solid two-phase discharging machine 7 which are arranged from left to right in sequence;

the second pyrolysis reactor comprises a first solid-phase feeder 9, a second heating cavity 10 and a second gas-solid two-phase discharging machine 11 which are sequentially arranged from left to right;

the third pyrolysis reactor comprises a second solid-phase feeder 13, a cooling cavity 14 and a third gas-solid two-phase discharging machine 15 which are sequentially arranged from left to right, and a third pyrolysis reactor discharging hole (III)16 is further formed in the third pyrolysis reactor.

In the above preferred embodiment, the first pyrolysis reactor, the second pyrolysis reactor and the third pyrolysis reactor are all micro-tilt angle rotary reactors, three pyrolysis reactors form a cascade pyrolysis system through cascade reaction, and all three reactors are provided with fixed jackets. In addition, a high-performance mechanical sealing structure is arranged between the first heating cavity 6 and the first gas-solid two-phase discharging machine 7, between the first solid-phase feeding machine 9 and the second heating cavity 10, between the second heating cavity 10 and the second gas-solid two-phase discharging machine 11, between the second solid-phase feeding machine 13 and the cooling cavity 14, and between the cooling cavity 14 and the third gas-solid two-phase discharging machine 15, so that external gas can permeate into the system and gas inside the system can escape in the reaction process, and the system can be safely produced while environmental pollution caused by the leakage of reactants can be prevented.

It should be further added here that the micro-tilt in the above-mentioned micro-tilt rotary reactor specifically refers to: the angle between the feed end and the discharge end is 1.2 degrees, and the rotating speed is constant 0.3 r/min.

In a preferred embodiment, the first pyrolysis reactor discharge port (I)8, the second pyrolysis reactor discharge port (II)12, and the third pyrolysis reactor discharge port (III)16 are respectively disposed at the bottom of the first gas-solid two-phase discharging machine 7, the bottom of the second gas-solid two-phase discharging machine 11, and the bottom of the third gas-solid two-phase discharging machine 15.

In a preferred embodiment, the first pyrolysis reactor outlet (I)8 is in communication with a first solid phase feeder 9 and the second pyrolysis reactor outlet (II)12 is in communication with a second solid phase feeder 13.

In the above preferred embodiment, the reaction raw material enters the second pyrolysis reactor through the first solid-phase feeder 9 after the first-stage pyrolysis reaction is completed in the first pyrolysis reactor to perform the second-stage pyrolysis reaction, and the reaction raw material enters the third pyrolysis reactor through the second solid-phase feeder 13 after the second-stage pyrolysis reaction is completed in the second pyrolysis reactor to perform the third-stage pyrolysis reaction.

In a preferred embodiment, pyrolysis oil gas outlets 20-1, 20-2 and 20-3 are respectively arranged on the first gas-solid two-phase discharging machine 7, the second gas-solid two-phase discharging machine 11 and the third gas-solid two-phase discharging machine 15;

a spiral shaft and spiral blades are further arranged in the first gas-solid two-phase discharging machine 7, the second gas-solid two-phase discharging machine 11 and the third gas-solid two-phase discharging machine 15 and are used for respectively pushing the reaction raw materials to one side of the first heating cavity 6, one side of the second heating cavity 10 and one side of the cooling cavity 14;

wherein, no helical blade is arranged on the helical shafts of the second gas-solid two-phase discharging machine 11 and the third gas-solid two-phase discharging machine 15 which are respectively corresponding to the first solid-phase feeding machine 9 and the second solid-phase feeding machine 13.

In a preferred embodiment, the system further comprises an oil gas condensation cooling device 22 communicated with the pyrolysis oil gas outlets 20-1, 20-2 and 20-3, a pyrolysis gas recycling device used for providing heat energy for the first pyrolysis reactor and the second pyrolysis reactor, and a pyrolysis carbon treatment device communicated with the discharge port (III)16 of the third pyrolysis reactor.

In the above preferred embodiment, the hot oil gas generated after the pyrolysis reaction of the reaction raw materials in the three pyrolysis reactors enters the oil gas condensation cooling device 22 through the pyrolysis oil gas outlets 20-1, 20-2, and 20-3 on the respective gas-solid two-phase discharging machines for condensation cooling treatment, the cooled part is condensed to obtain condensed oil, and the non-condensable gas enters the pyrolysis gas recycling device to provide heat energy for the first pyrolysis reactor and the second pyrolysis reactor.

In addition, substances such as pyrolytic carbon or carbon black and the like generated after the reaction raw materials complete the third-stage pyrolysis reaction in the third pyrolysis reactor enter the pyrolytic carbon treatment device through the discharge hole (III)16 of the third pyrolysis reactor for subsequent modification and granulation treatment, and finally products such as high-added-value carbon black and the like with few impurities and good quality are obtained.

The invention also provides a novel continuous thermal cracking treatment method, which comprises the following steps:

a raw material feeding step of adding reaction raw materials into a feeding device of the thermal cracking reaction system;

a thermal cracking reaction step, namely adding the reaction raw materials into the feeding device, and then feeding the reaction raw materials into a thermal cracking device to perform three-stage continuous cascade thermal cracking reaction to finally obtain a pyrolysis product;

a flue gas treatment step, wherein the flue gas generated in the thermal cracking reaction step of the reaction raw material is treated and discharged after reaching the standard;

a step of condensation and cooling treatment of hot oil gas, in which the hot oil gas generated in the step of thermal cracking reaction of the reaction raw material is cooled, and condensed oil is obtained and then recovered;

and a pyrolysis gas recycling step, namely recycling the pyrolysis gas generated in the thermal cracking reaction step of the reaction raw material to provide heat energy for the thermal cracking reaction step.

In the treatment method, three stages of continuous cascade pyrolysis reactions are arranged, the three pyrolysis processes of the waste tire are respectively and independently arranged in the reaction section, and the temperature is respectively and independently controlled, so that the reaction target is clear, the heat energy consumption is lower, the reaction is more sufficient, and the quality of the reaction product is higher.

In addition, the flue gas treatment step arranged in the treatment method enables toxic and harmful gases generated in the pyrolysis reaction to be effectively treated, so that the environmental pollution is prevented; the hot oil gas condensation and cooling treatment step is arranged, so that oil substances generated in the pyrolysis reaction of the waste tires can be efficiently recovered, and the comprehensive utilization rate of the waste tires is improved; the pyrolysis gas recycling step is arranged, so that the noncondensable oil gas generated by the waste tire in the pyrolysis reaction can be further recycled, and heat energy is provided for the pyrolysis device.

In a preferred embodiment, the three-stage continuous step thermal cracking reaction in the thermal cracking reaction step comprises: a first-stage pyrolysis reaction, a second-stage pyrolysis reaction and a third-stage pyrolysis reaction;

wherein the reaction conditions of the first-stage pyrolysis reaction, the second-stage pyrolysis reaction and the third-stage pyrolysis reaction are respectively 150-180 ℃, 50-5 kPa, 380-450 ℃, 50-5 kPa and 150-200 ℃, 50-5 kPa.

In the preferred embodiment described above, the purpose of the primary pyrolysis reaction is: the preheating of the waste tire colloidal particles and the desorption of the tire filling oil are realized. Wherein, the temperature in the reaction condition can be selected from 150, 160, 170 and 180 ℃ or any value in the limited range can be within the protection range of the invention, and the pressure can be selected from-50, -45, -40, -35, -30, -25, -20, -15, -10 and-5 kPa or any value in the limited range can be within the protection range of the invention;

the purpose of the secondary pyrolysis reaction is: the natural rubber and the synthetic rubber in the waste tire are cracked in sequence to generate organic matters and pyrolytic carbon distributed between C1-C16. Wherein, the temperature in the reaction condition can be selected from 380, 390, 400, 410, 420, 430, 440 and 450 ℃ or any value in the above limited range falls within the protection range of the invention, and the pressure can be selected from-50, -45, -40, -35, -30, -25, -20, -15, -10 and-5 kPa or any value in the above limited range falls within the protection range of the invention;

the purpose of the three pyrolysis reactions is: desorption of small molecular organic matters attached to the pyrolytic carbon is realized, the quality of the pyrolytic carbon is further stabilized, and the pyrolytic reaction is stopped by gradually reducing the temperature. Wherein, the temperature of the reaction condition can be selected from 150, 160, 170, 180, 190, 200 ℃ or any value in the above limited range, and the pressure can be selected from-50, -45, -40, -35, -30, -25, -20, -15, -10, -5kPa or any value in the above limited range, and the protection range of the invention is included.

In a preferred embodiment, the reaction raw material is waste tires or waste rubber products.

In order to more clearly and specifically describe the novel continuous thermal cracking reaction system and the processing method thereof provided by the embodiments of the present invention, the following description will be made with reference to specific embodiments.