System and method for regenerating carbon black through pyrolysis of waste rubber under molten salt liquid phase condition

Abstract

The invention discloses a system and a method for regenerating carbon black by pyrolysis of waste rubber based on a molten salt liquid phase condition. The system comprises a waste rubber pyrolysis unit, a pyrolysis oil condensation unit and a hydrogen-rich combustible gas collection unit, the waste rubber pyrolysis unit comprises a pyrolyzer, a solar heat collector and a carbon storage tank; the pyrolytic oil condensation unit comprises an air cooler, an oil storage tank and a water cooler; the hydrogen-rich combustible gas collecting unit comprises a compressor and a gas storage tank which are connected in sequence; solar energy is absorbed and utilized for heating, the solar energy conversion efficiency of the adopted flat plate type solar heat collector is high, and the use of fuel oil and natural gas in a traditional heating mode is reduced through the heating mode. By using the mode, the energy conversion efficiency is greatly improved, and the energy consumption and the use of traditional energy are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of waste treatment and resource recycling, and in particular to a system and method for regenerating carbon black by pyrolysis of waste rubber under molten salt liquid phase conditions. Background Art

[0002] Waste rubber contains rubber, carbon black, metal, fiber skeleton materials, rubber processing aids and other substances. It has a high resource endowment and is one of the six major solid renewable resources. Pyrolysis of waste rubber produces solid char, pyrolysis oil and pyrolysis gas. Carbon black is an important product of waste rubber pyrolysis. However, the current waste rubber pyrolysis technology has the following problems: (1) The waste rubber pyrolysis process is extensive, with low carbon black yield and high energy consumption; (2) The quality of carbon black regenerated from waste rubber is poor, and there is a lack of effective carbon black performance enhancement technology; (3) The waste rubber regeneration process produces many types of pollutants and a large amount of emissions.

[0003] At present, scholars have conducted a lot of research on the problems of low yield and high energy consumption of carbon black regeneration from waste rubber pyrolysis. However, the current research only focuses on product distribution and cannot fundamentally solve the problem of high energy consumption and low yield in the pyrolysis process. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention provides a system and method for regenerating carbon black by pyrolysis of waste rubber under molten salt liquid phase conditions, aiming to solve the problems of low yield and high energy consumption of carbon black regenerated by pyrolysis of waste rubber.

[0005] The technical solution of the present invention is as follows:

[0006] In a first aspect of the present invention, a waste rubber pyrolysis regeneration carbon black system based on molten salt liquid phase conditions is provided, comprising a waste rubber pyrolysis unit, a pyrolysis oil condensation unit and a hydrogen-rich combustible gas collection unit;

[0007] The waste rubber pyrolysis unit comprises a pyrolyzer, a solar collector and a carbon storage tank. The pyrolyzer is provided with two feed ports and a discharge port. The two feed ports respectively feed waste rubber and molten salt. The discharge port is connected to the carbon storage tank. The solar collector is installed on the pyrolyzer to provide heat for the pyrolyzer.

[0008] The pyrolysis oil condensation unit includes an air cooler, an oil storage tank and a water cooler, the inlet of the air cooler is connected to the bottom of the carbon storage tank, and the oil outlets of the air cooler and the water cooler are both connected to the oil storage tank;

[0009] The hydrogen-rich combustible gas collection unit comprises a compressor and a gas storage tank which are connected in sequence, and the inlet of the compressor is connected to the gas outlet of the air cooler.

[0010] In some embodiments of the present invention, one feed port on the pyrolyzer is connected to a screw feeder and a silo in sequence, and the molten salt is stored in the silo; another feed port is connected to a vertical feeder, and the feed port of the vertical feeder enters the waste rubber.

[0011] In some embodiments of the present invention, the pyrolyzer is a series-parallel rotary kiln pyrolyzer or a series rotary kiln pyrolyzer.

[0012] In some embodiments of the present invention, a calcination section is provided inside the series-parallel rotary kiln pyrolyzer, in which the molten salt and the waste rubber are in direct contact, and heat is provided by a heat transfer medium heated by a solar collector for pyrolysis.

[0013] In some embodiments of the present invention, an inclined pipe is provided at the tail of the series-parallel rotary kiln pyrolyzer, and a screen is installed at the bottom of the inclined pipe to recover the molten salt that is not fully utilized in the previous pyrolysis reaction and return it to the calcination section through the bottom reflux pipe and the connecting pipe.

[0014] In some embodiments of the present invention, a molten salt pipe and a waste rubber pipe are provided in the series rotary kiln pyrolyzer to transport molten salt and waste rubber respectively, and the solar collector heats the molten salt, and the molten salt transfers heat to the waste rubber for pyrolysis.

[0015] In some embodiments of the present invention, a plurality of molten salt tubes are arranged around the circumference of the waste rubber tube.

[0016] In some embodiments of the present invention, the air outlet of the air cooler is connected to the water cooler through a pipeline.

[0017] In a second aspect of the present invention, a working method of a waste rubber pyrolysis regeneration carbon black system under molten salt liquid phase conditions is provided, comprising:

[0018] The molten salt and waste rubber enter the calcination section of the pyrolyzer, and the solar collector provides heat through the heat transfer medium, causing the waste rubber to undergo pyrolysis reaction in the molten salt liquid phase environment;

[0019] The solid product carbon black after pyrolysis is stored in the carbon storage tank, the pyrolysis gas enters the air cooler and water cooler for condensation, the volatile matter containing pyrolysis oil is condensed and enters the oil storage tank, and the pyrolysis gas containing hydrogen-rich combustible gas is pressurized and enters the gas storage tank.

[0020] In a third aspect of the present invention, a working method of a waste rubber pyrolysis regeneration carbon black system under molten salt liquid phase conditions is provided, comprising:

[0021] The molten salt and waste rubber enter the calcination section of the pyrolyzer respectively, and the solar collector provides heat through the molten salt to cause the waste rubber to undergo pyrolysis reaction;

[0022] The solid product carbon black after pyrolysis is stored in the carbon storage tank, the pyrolysis gas enters the air cooler and water cooler for condensation, the volatile matter containing pyrolysis oil is condensed and enters the oil storage tank, and the pyrolysis gas containing hydrogen-rich combustible gas is pressurized and enters the gas storage tank.

[0023] One or more technical solutions of the present invention have the following beneficial effects:

[0024] 1. The waste rubber pyrolysis system of the present invention absorbs and utilizes solar energy for heating, and the flat-plate solar collector used has a high conversion efficiency of solar energy. This heating method reduces the use of fuel oil and natural gas in traditional heating methods. The use of this method greatly improves the energy conversion efficiency and reduces energy consumption and the use of traditional energy.

[0025] 2. The present invention uses molten salt as a heat transfer medium instead of directly using absorbed and fixed solar energy. If absorbed and fixed solar energy is directly used, it may cause uneven heating surface during the pyrolysis of waste rubber; using molten salt for heat transfer not only makes better use of solar energy, but also allows the waste rubber to be heated evenly. In the series-parallel rotary kiln pyrolyzer, the molten salt is directly mixed and contacted with the waste rubber, which can significantly increase the porosity and specific surface area of ​​the carbon black, and play a certain role in strengthening the performance of the carbon black.

[0026] 3. The present invention arranges a section of inclined pipe and a screen with a certain mesh number at the tail of the series-parallel rotary kiln pyrolyzer to achieve the reuse of the molten salt that has not been completely reacted, improve the utilization efficiency of the raw materials, and thus save the reaction time.

[0027] 4. The waste rubber pyrolysis system of the present invention is provided with a waste rubber pyrolysis unit, a pyrolysis oil condensation unit and a hydrogen-rich combustible gas collection unit, and collects three products of carbon black, bio-oil and hydrogen-rich combustible gas through multi-stage processing, which helps to realize the high-value utilization of waste rubber. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 Schematic diagram of the carbon black regeneration system of waste rubber pyrolysis under molten salt liquid phase conditions in series-parallel connection of the present invention;

[0029] Figure 2 Schematic diagram of the carbon black regeneration system of waste rubber pyrolysis under molten salt liquid phase conditions in series according to the present invention;

[0030] Figure 3 It is a front view of the series-parallel rotary kiln pyrolyzer of the present invention;

[0031] Figure 4 It is a front view of a serial rotary kiln pyrolyzer in the present invention;

[0032] Figure 5The heat transfer process in two different devices is shown below. Indicates the direction of heat transfer, and “→” indicates reinforcement.

[0033] In the figure: 1. silo; 2. screw feeder; 3. fixing device; 4. vertical feeder; 5. solar collector; 6. series-parallel rotary kiln pyrolyzer; 7. carbon storage tank; 8. air cooler; 9. oil storage tank; 10. water cooler; 11. compressor; 12. gas storage tank; 13. first screen; 14. second screen; 15. series rotary kiln pyrolyzer; 16. pyrolysis gas pipeline; 17. heat transfer medium; 18. molten salt feed port; 19. waste rubber feed port; 20. calcination section; 21. bottom reflux pipeline; 22. connecting pipeline. DETAILED DESCRIPTION

[0034] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0035] Example 1

[0036] In a typical embodiment of the present invention, a system for regenerating carbon black by pyrolysis of waste rubber under molten salt liquid phase conditions is proposed, such as Figure 1 and Figure 2 As shown, it includes a waste rubber pyrolysis unit, a pyrolysis oil condensation unit and a hydrogen-rich combustible gas collection unit;

[0037] The waste rubber pyrolysis unit comprises a pyrolyzer, a solar collector 5 and a carbon storage tank 7. The pyrolyzer is provided with two feed ports and a discharge port. The two feed ports respectively feed waste rubber and molten salt. The discharge port is connected to the carbon storage tank 7. The solar collector 5 is installed on the pyrolyzer to provide heat for the pyrolyzer.

[0038] The pyrolysis oil condensation unit includes an air cooler 8, an oil storage tank 9 and a water cooler 10. The inlet of the air cooler 8 is connected to the bottom of the carbon storage tank 7, and the oil outlets of the air cooler 8 and the water cooler 10 are both connected to the oil storage tank 9.

[0039] The hydrogen-rich combustible gas collection unit comprises a compressor 11 and a gas storage tank 12 which are connected in sequence, and the inlet of the compressor 11 is connected to the gas outlet of the air cooler 8 .

[0040] In this embodiment, one feed port on the pyrolyzer is connected to a screw feeder 2 and a silo 1 in sequence, and the silo 1 stores molten salt; another feed port is connected to a vertical feeder 4, and the feed port of the vertical feeder 4 enters waste rubber.

[0041] The molten salt stored in the silo 1 is fed into the pyrolyzer through the screw feeder 2, and the waste rubber enters the pyrolyzer through the vertical feeder 4 for pyrolysis; the outlet of the rotary kiln pyrolyzer is connected to the carbon storage tank 7 and the pyrolysis gas pipeline 16, and the solid product carbon black after pyrolysis enters the carbon storage tank 7 for storage. A first screen 13 is provided in the carbon storage tank 7, and the solid product carbon black is located on the first screen 13. The pyrolysis gas containing volatiles such as pyrolysis oil enters the pyrolysis oil condensation unit along the pipeline at the bottom of the carbon storage tank.

[0042] In this embodiment, the pyrolyzer is a series-parallel rotary kiln pyrolyzer 6 or a series rotary kiln pyrolyzer 15, and the pyrolyzer is mounted on a fixing device 3 for fixing.

[0043] like Figure 1 and Figure 3 As shown, a calcination section 20 is provided inside the series-parallel rotary kiln pyrolyzer 6, in which the molten salt and the waste rubber are in direct contact, and the heat is provided by the heat transfer medium 17 heated by the solar collector 5 for pyrolysis.

[0044] Furthermore, a section of inclined pipe is provided at the tail of the series-parallel rotary kiln pyrolyzer 6, and a second screen 14 is installed at the bottom of the inclined pipe to recover the molten salt not fully utilized in the previous pyrolysis reaction and return it to the calcination section 20 through the bottom reflux pipe and the connecting pipe.

[0045] Specifically, the inclined pipeline is connected to the pyrolysis gas pipeline 16, and products such as carbon black, pyrolysis oil, and pyrolysis gas enter the product processing device along the pyrolysis gas pipeline 16. A screen with a certain mesh size is installed at the bottom of the inclined pipeline to recover the molten salt that is not fully utilized in the previous pyrolysis reaction and return it to the head of the pyrolyzer kiln through the bottom reflux pipeline 21; a spiral riser is installed in the connecting pipeline 22 to transport the molten salt in the bottom reflux pipeline 21 to the calcination section 20 of the rotary kiln barrel for reuse; a heat transfer medium 17 is attached to the pipeline surface of the calcination section of the rotary kiln, and the solar collector 5 converts the absorbed solar energy into heat energy and transmits it to the heat transfer medium 17, and transmits the converted heat energy to the calcination section 20 of the rotary kiln through the heat transfer medium 17 for waste rubber pyrolysis reaction.

[0046] like Figure 2 and Figure 4 As shown, the serial rotary kiln pyrolyzer 15 is provided with a molten salt pipe and a waste rubber pipe for conveying molten salt and waste rubber respectively, the solar collector 5 heats the molten salt, and the molten salt transfers heat to the waste rubber for pyrolysis. Furthermore, a plurality of molten salt pipes are arranged around the circumference of the waste rubber pipe.

[0047] Specifically, the molten salt has two feed ports, and a solar collector 5 is attached to the outside of the molten salt transport pipeline. The 19-waste rubber feed port is directly connected to the calcination section 20 of the rotary kiln. After the molten salt in the molten salt transport pipeline receives the heat energy transmitted by the solar collector 5, the heat energy is directly transmitted to the waste rubber in the calcination section 20 of the rotary kiln; this device is simple in design, and the molten salt has no direct contact with the waste rubber. Therefore, the performance of the carbon black regenerated by pyrolysis of the waste rubber cannot be enhanced, and the performance enhancement of the carbon black is still required later; the molten salt is still consumed during the heat transfer process, so the molten salt feed port 18 needs to be continuously supplied with molten salt.

[0048] In this embodiment, the inlet of the air cooler 8 of the pyrolysis oil condensation unit is connected to the bottom pipeline of the carbon storage tank 7, and the gas outlet is connected to the water cooler 10. The water cooler 10 introduces circulating cooling water from the outside to condense the heavy components and a small amount of light components of the pyrolysis oil after pyrolysis; the gas outlet of the water cooler 10 is connected to the hydrogen-rich combustible gas collection part; the oil outlet at the bottom of the air cooler 8 and the water cooler 10 is connected to the oil storage tank 9, which is used for the collection and storage of pyrolysis oil for later processing. By connecting the gas outlet of the air cooler 8 to the water cooler 10 through a pipeline, the pyrolysis oil that is not completely condensed by the pyrolysis gas is further condensed by the water cooler 10.

[0049] The compressor 11 of the hydrogen-rich combustible gas collecting unit is used to pressurize the hydrogen-rich combustible gas at the outlet of the pyrolysis oil condensation section, and the inlet of the gas storage tank 12 is connected to the compressor 11 for collecting the hydrogen-rich combustible gas.

[0050] The working principle of the waste rubber pyrolysis regeneration carbon black system provided in this embodiment based on molten salt liquid phase conditions is as follows:

[0051] like Figure 1-5 As shown, the screw feeder 2 and the vertical feeder 4 respectively feed the waste rubber and the molten salt into the rotary kiln pyrolyzer, the solid product carbon black after pyrolysis enters the carbon storage tank 7 for storage, and the pyrolysis gas containing volatiles such as pyrolysis oil is discharged from the rotary kiln pyrolyzer along the pipeline. The pyrolyzer absorbs solar radiation through the solar collector 5, generates heat energy and transfers it to the rotary kiln pyrolyzer through the heat transfer medium. The transferred heat energy is absorbed by the molten salt, providing energy for the process of pyrolysis and regeneration of carbon black from waste rubber; wherein, a screen with a certain mesh number is set at the kiln tail part of the series-parallel rotary kiln pyrolyzer 6 to screen out the incompletely reacted molten salt, which is returned to the entrance of the rotary kiln pyrolyzer through the screw feeder, and the incompletely reacted molten salt can be reused.

[0052] The pyrolysis gas containing volatile components such as pyrolysis oil enters the air cooler 8, and is continuously supplied with air by the cooling fan to condense the volatile components containing pyrolysis oil after the pyrolysis of the waste rubber; the outlet of the water cooler 10 is connected to the hydrogen-rich combustible gas collection unit, and circulating condensed water is introduced to the outside of the condenser pipe of the water cooler to condense most of the components of the pyrolysis oil; the oil storage tank 9 is used to collect and store the pyrolysis oil for later processing.

[0053] The compressor 11 of the hydrogen-rich combustible gas collection unit is used to pressurize the pyrolysis gas containing a large amount of hydrogen-rich combustible gas generated by the waste rubber pyrolysis section; the inlet of the gas storage tank 12 is connected to the compressor 11 and is used to collect the pyrolysis gas mainly containing hydrogen-rich combustible gas.

[0054] In this embodiment, the screw feeder 2 is made of high temperature resistant steel and is used to transport the molten salt in the silo; the vertical feeder 4 is used to transport the waste rubber. During the feeding process, the conveying pipelines of the screw feeder and the vertical feeder are not connected. In the series-parallel rotary kiln pyrolyzer 6, the waste rubber enters from the A feed port, and the molten salt enters from the B feed port; in the series rotary kiln pyrolyzer 15, the waste rubber enters from the B feed port, and the molten salt enters from the A and C feed ports.

[0055] As a further preferred embodiment, the solar collector 5 in the pyrolysis device adopts a flat plate type with a large heat absorption area. When the flat plate type solar collector is working, the solar radiation passes through the transparent cover plate and irradiates the heat absorber with an adsorption layer on the surface. Most of the solar radiation is absorbed by the heat absorber and converted into heat energy, and then the heat energy is transferred to the rotary kiln pyrolyzer through the heat transfer medium. The internal structure of the rotary kiln pyrolyzer is divided into two types: series connection and series-parallel connection.

[0056] Inside the series-parallel rotary kiln pyrolyzer 6, a spiral riser is installed between the B feed port and the A feed port, which can transport the molten salt entering from the B feed port and the molten salt that is not completely utilized in the previous reaction to the calcining section of the rotary kiln barrel, so that the waste rubber undergoes a pyrolysis reaction in the molten salt liquid phase environment; an inclined pipe and a screen with a certain mesh number are arranged at the end of the rotary kiln pyrolyzer, and the pyrolysis product carbon black enters the carbon storage tank from the end of the rotary kiln pyrolyzer along the inclined pipe, while the incompletely reacted molten salt is screened out by the screen and then returned to the B feed port through the bottom pipe.

[0057] Inside the series rotary kiln pyrolyzer 15, the middle feed port B is the waste rubber feed port 19, and the feed ports A and C on the upper and lower sides are molten salt feed ports. The molten salt absorbs the solar energy fixed by the solar collector, and transfers the heat energy to the waste rubber moving along the pyrolysis pipe toward the end of the rotary kiln pyrolyzer under the push of the screw rod, so that the waste rubber undergoes a pyrolysis reaction; the molten salt will be consumed in the process of absorbing and transferring heat energy, so the feed ports A and C need to continuously supply molten salt.

[0058] Example 2

[0059] In a typical embodiment of the present invention, a working method of a waste rubber pyrolysis regeneration carbon black system under molten salt liquid phase conditions is provided, which adopts a series-parallel rotary kiln pyrolyzer, comprising:

[0060] The molten salt and waste rubber enter the calcination section of the pyrolyzer, and the solar collector provides heat through the heat transfer medium, causing the waste rubber to undergo pyrolysis reaction in the molten salt liquid phase environment;

[0061] The solid product carbon black after pyrolysis is stored in the carbon storage tank, the pyrolysis gas enters the air cooler and water cooler for condensation, the volatile matter containing pyrolysis oil is condensed and enters the oil storage tank, and the pyrolysis gas containing hydrogen-rich combustible gas is pressurized and enters the gas storage tank.

[0062] Specifically, the molten salt in the silo is mixed with the waste rubber that enters the rotary kiln pyrolyzer through a screw feeder and a vertical feeder, and is pyrolyzed in an oxygen-free environment to generate carbon black, pyrolysis oil and pyrolysis gas. Driven by the screw rod, the pyrolysis products move to the end of the rotary kiln pyrolyzer, and the incompletely reacted molten salt passes through a screen and returns to the head of the rotary kiln for reuse. The carbon black is stored in a carbon storage tank, and the volatile matter containing pyrolysis oil is discharged from the bottom pipe of the carbon storage tank.

[0063] The main components of volatile matter are pyrolysis oil and olefin substances such as hydrogen, methane, and ethylene. The volatile matter after pyrolysis is sequentially condensed through an air cooler and a water cooler. The heavy and light components of the pyrolysis oil are condensed separately and stored in an oil storage tank.

[0064] The remaining hydrogen-rich combustible gas after condensation is pressurized by a compressor and then stored in a gas tank.

[0065] Example 3

[0066] In a typical embodiment of the present invention, a working method of a waste rubber pyrolysis regeneration carbon black system based on molten salt liquid phase conditions is provided, which adopts a series rotary kiln pyrolyzer, comprising:

[0067] The molten salt and waste rubber enter the calcination section of the pyrolyzer respectively, and the solar collector provides heat through the molten salt to cause the waste rubber to undergo pyrolysis reaction;

[0068] The solid product carbon black after pyrolysis is stored in the carbon storage tank, the pyrolysis gas enters the air cooler and water cooler for condensation, the volatile matter containing pyrolysis oil is condensed and enters the oil storage tank, and the pyrolysis gas containing hydrogen-rich combustible gas is pressurized and enters the gas storage tank.

[0069] Although the above describes the specific implementation mode of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without creative work are still within the scope of protection of the present invention.

Claims

1. A system for regenerating carbon black by pyrolysis of waste rubber under molten salt liquid phase conditions, characterized in that: It includes a waste rubber pyrolysis unit, a pyrolysis oil condensation unit and a hydrogen-rich combustible gas collection unit; The waste rubber pyrolysis unit comprises a pyrolyzer, a solar collector and a carbon storage tank. The pyrolyzer is provided with two feed ports and a discharge port. The two feed ports respectively feed waste rubber and molten salt. The discharge port is connected to the carbon storage tank. The solar collector is installed on the pyrolyzer to provide heat for the pyrolyzer. The pyrolysis oil condensation unit comprises an air cooler, an oil storage tank and a water cooler, the inlet of the air cooler is connected to the bottom of the carbon storage tank, and the oil outlets of the air cooler and the water cooler are both connected to the oil storage tank; The hydrogen-rich combustible gas collection unit comprises a compressor and a gas storage tank which are connected in sequence, and the inlet of the compressor is connected to the gas outlet of the air cooler.

2. The system for regenerating carbon black based on waste rubber pyrolysis under molten salt liquid phase conditions according to claim 1, characterized in that: One feed port on the pyrolyzer is connected to a screw feeder and a silo in sequence, and molten salt is stored in the silo; another feed port is connected to a vertical feeder, and the feed port of the vertical feeder enters waste rubber.

3. The system for regenerating carbon black based on waste rubber pyrolysis under molten salt liquid phase conditions according to claim 1, characterized in that: The pyrolyzer is a series-parallel rotary kiln pyrolyzer or a series rotary kiln pyrolyzer.

4. The system for regenerating carbon black based on waste rubber pyrolysis under molten salt liquid phase conditions as claimed in claim 3, characterized in that: A calcining section is arranged inside the series-parallel rotary kiln pyrolyzer, in which the molten salt and the waste rubber are in direct contact, and the heat is provided by the heat transfer medium heated by the solar collector for pyrolysis.

5. The system for regenerating carbon black based on waste rubber pyrolysis under molten salt liquid phase conditions as claimed in claim 4, characterized in that: A section of inclined pipe is arranged at the tail of the series-parallel rotary kiln pyrolyzer, and a screen is installed at the bottom of the inclined pipe to recover the molten salt that is not fully utilized in the previous pyrolysis reaction and return it to the calcination section through the bottom reflux pipe and the connecting pipe.

6. The system for regenerating carbon black based on waste rubber pyrolysis under molten salt liquid phase conditions as claimed in claim 3, characterized in that: The series rotary kiln pyrolyzer is provided with a molten salt pipe and a waste rubber pipe for conveying molten salt and waste rubber respectively. The solar collector heats the molten salt, and the molten salt transfers heat to the waste rubber for pyrolysis.

7. The system for regenerating carbon black based on waste rubber pyrolysis under molten salt liquid phase conditions as claimed in claim 3, characterized in that: A plurality of molten salt pipes are arranged around the circumference of the waste rubber pipe.

8. The system for regenerating carbon black based on waste rubber pyrolysis under molten salt liquid phase conditions as claimed in claim 1, characterized in that: The air outlet of the air cooler is connected to the water cooler through a pipeline.

9. A working method of a waste rubber pyrolysis regeneration carbon black system under molten salt liquid phase conditions as described in any one of claims 1 to 8, characterized in that: include: The molten salt and waste rubber enter the calcination section of the pyrolyzer, and the solar collector provides heat through the heat transfer medium, causing the waste rubber to undergo pyrolysis reaction in the molten salt liquid phase environment; The solid product carbon black after pyrolysis is stored in the carbon storage tank, the pyrolysis gas enters the air cooler and water cooler for condensation, the volatile matter containing pyrolysis oil is condensed and enters the oil storage tank, and the pyrolysis gas containing hydrogen-rich combustible gas is pressurized and enters the gas storage tank.

10. A working method of a waste rubber pyrolysis regeneration carbon black system under molten salt liquid phase conditions as described in any one of claims 1 to 8, characterized in that: include: The molten salt and waste rubber enter the calcination section of the pyrolyzer respectively, and the solar collector provides heat through the molten salt to cause the waste rubber to undergo pyrolysis reaction; The solid product carbon black after pyrolysis is stored in the carbon storage tank, the pyrolysis gas enters the air cooler and water cooler for condensation, the volatile matter containing pyrolysis oil is condensed and enters the oil storage tank, and the pyrolysis gas containing hydrogen-rich combustible gas is pressurized and enters the gas storage tank.

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