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CN-121975352-A - Carbon black treatment system

CN121975352ACN 121975352 ACN121975352 ACN 121975352ACN-121975352-A

Abstract

The embodiment of the invention provides a carbon black treatment system, which is used for carrying out pyrolysis treatment on rubber and plastic raw materials to generate primary carbon black so as to realize harmless and quantitative pretreatment of rubber and plastic waste, and is connected with a pyrolysis system through a pipeline to carry out high-temperature incineration on the primary carbon black to generate high-temperature flue gas, so that the continuous treatment capacity and combustion efficiency far higher than those of the conventional coal-fired boiler are realized in a treatment link by using a circulating fluidized bed technology, the treatment scale and heat energy output of the primary carbon black are obviously improved, and the waste heat recovery system is respectively connected with the circulating fluidized bed incineration system and the pyrolysis system through pipelines to carry out waste heat recovery and heat exchange treatment on the high-temperature flue gas to generate purified flue gas and water vapor and generate electricity by utilizing water vapor to realize efficient recovery of flue gas heat energy, reduce the dependence on external energy and realize efficient utilization of rubber and plastic waste.

Inventors

  • SHI CHAOTING
  • YANG SHAOJUN
  • BAO SHAOLIN

Assignees

  • 中科合肥煤气化技术有限公司

Dates

Publication Date
20260505
Application Date
20260202

Claims (10)

  1. 1. A carbon black treatment system, comprising: the cracking system is used for receiving and cracking rubber and plastic raw materials to generate primary carbon black; the circulating fluidized bed incineration system is connected with the cracking system and is used for receiving and incinerating the primary carbon black to generate high-temperature flue gas; And the waste heat recovery system is respectively connected with the circulating fluidized bed incineration system and the cracking system, and is used for receiving the high-temperature flue gas, exchanging heat with the high-temperature flue gas, generating purified flue gas and water vapor, and generating electricity by utilizing the water vapor.
  2. 2. The carbon black treatment system of claim 1, wherein the cracking system comprises: The pretreatment device is used for receiving and pretreating the rubber and plastic raw materials and outputting raw material particles; the thermal cracking reaction device is connected with the pretreatment device and is used for receiving and cracking the raw material particles to generate primary carbon black and pyrolysis oil; the oil tank is connected with the thermal cracking reaction device and is used for receiving and storing the pyrolysis oil; and the buffer bin is connected with the thermal cracking reaction device and is used for receiving and storing the primary carbon black.
  3. 3. The carbon black treatment system of claim 1, wherein the circulating fluidized bed incineration system comprises: the material returning device is connected with the cracking system, the cyclone separator and the incinerator through pipelines and is used for receiving the primary carbon black output by the cracking system and the secondary carbon black output by the cyclone separator and conveying the primary carbon black and the secondary carbon black into the incinerator; the incinerator is connected with the material returning device through a pipeline and is used for receiving and incinerating the primary carbon black to generate high-temperature flue gas and secondary carbon black; And the cyclone separator is connected with the incinerator and is used for separating the high-temperature flue gas generated by the incinerator from the secondary carbon black.
  4. 4. The carbon black treatment system of claim 1, wherein the waste heat recovery system comprises: The waste heat recovery device is connected with the circulating fluidized bed incineration system through a pipeline and is used for receiving the high-temperature flue gas and boiler feed water and exchanging heat between the high-temperature flue gas and the boiler feed water to generate water vapor and low-temperature flue gas; The flue gas purifying device is connected with the waste heat recovery device and is used for receiving and purifying the low-temperature flue gas exhausted by the waste heat recovery device; and the steam turbine generator unit is connected with the waste heat recovery device and is used for receiving and utilizing the steam to generate electricity and generating the boiler water supply and low-pressure steam.
  5. 5. The carbon black treatment system of claim 4, wherein the carbon black treatment system comprises, The steam turbine generator unit is used for outputting the boiler feed water to the waste heat recovery device; The steam turbine generator unit is also connected with the cracking system and is used for outputting low-pressure steam to the cracking system so as to dry the rubber and plastic raw materials and preserve heat of products in the cracking system.
  6. 6. The carbon black treatment system of claim 2, wherein: the pretreatment device comprises a feed inlet and a discharge outlet, wherein the feed inlet of the pretreatment device is used for receiving rubber and plastic raw materials; The thermal cracking reaction device comprises a first discharge hole and a second discharge hole, and the first discharge hole of the thermal cracking reaction device is connected with the oil tank through a pipeline and is used for outputting pyrolysis oil to the oil tank; the second discharge port of the thermal cracking reaction device is connected with the buffer bin through a pipeline and is used for outputting primary carbon black to the buffer bin; The oil tank comprises a feed inlet, is connected with a first discharge outlet of the thermal cracking reaction device through a pipeline, and is used for receiving and storing the pyrolysis oil output by the thermal cracking reaction device; The buffer bin comprises a discharge hole, and is connected with a second discharge hole of the thermal cracking reaction device through a pipeline and used for receiving the primary carbon black output by the buffer bin.
  7. 7. A carbon black treatment system according to claim 3, wherein: The material returning device comprises a first feeding port, a second feeding port and a discharging port; the device comprises a cracking system, a cyclone separator, a first feeding port, a second feeding port, a material returning device, a first discharging port and a second feeding port, wherein the first feeding port of the material returning device is used for receiving primary carbon black output by the cracking system; the incinerator comprises a feed inlet and an air outlet, wherein the feed inlet of the incinerator is connected with the discharge outlet of the material returning device through a pipeline and is used for receiving the primary carbon black; The cyclone separator comprises an air inlet, an air outlet and a discharge port, wherein the air inlet of the cyclone separator is connected with the air outlet of the incinerator through a pipeline and is used for receiving the high-temperature flue gas and the secondary carbon black output by the incinerator, the air outlet of the cyclone separator is connected with the waste heat recovery system and is used for outputting the high-temperature flue gas after cyclone separation, and the discharge port of the cyclone separator is connected with the feed inlet of the material returning device and is used for outputting the secondary carbon black separated from the high-temperature flue gas.
  8. 8. The carbon black treatment system of claim 4, wherein: The waste heat recovery device comprises an air inlet, a water inlet, a first air outlet and a second air outlet, and the air inlet of the waste heat recovery device is connected with the circulating fluidized bed incineration system through a pipeline and is used for receiving the high-temperature flue gas; the system comprises a boiler water supply device, a waste heat recovery device, a steam turbine generator unit, a flue gas purification device, a heat exchange device and a heat exchange device, wherein the boiler water supply device is used for supplying water to the boiler; the flue gas purification device comprises an air inlet and an air outlet, wherein the air inlet of the flue gas purification device is connected with the second air outlet of the waste heat recovery device through a pipeline and is used for receiving the low-temperature flue gas; the steam turbine generator unit comprises an air inlet, a water outlet and an air outlet, wherein the air inlet of the steam turbine generator unit is connected with the first air outlet of the waste heat recovery device and used for receiving the steam, the water outlet of the steam turbine generator unit is used for outputting boiler feed water, and the air outlet of the steam turbine generator unit is used for outputting low-pressure steam.
  9. 9. The carbon black treatment system of claim 8, wherein the carbon black treatment system comprises, The steam turbine generator unit further comprises a water outlet of the steam turbine generator unit, which is connected with a water inlet of the waste heat recovery device through a pipeline and used for outputting boiler water supply to the waste heat recovery device, and an air outlet of the steam turbine generator unit, which is connected with the cracking system through a pipeline and used for outputting low-pressure steam to the cracking system.
  10. 10. The carbon black treatment system of claim 6, wherein the carbon black treatment system comprises, The oil tank further comprises an air inlet which is connected with the waste heat recovery system through a pipeline and is used for receiving low-pressure steam output by the waste heat recovery system so as to keep the pyrolysis oil in the oil tank warm; The pretreatment device further comprises an air inlet which is connected with the waste heat recovery system through a pipeline and used for receiving low-pressure steam output by the waste heat recovery system so as to dry raw material particles in the pretreatment device.

Description

Carbon black treatment system Technical Field The invention relates to the technical field of crude carbon black treatment generated by cracking reaction, in particular to a carbon black treatment system. Background In the rubber and plastic integrated thermal cracking process, the high-value utilization of the pyrolysis oil and the effective disposal of byproducts are key to realizing the economic benefit and the environmental protection value. At present, pyrolysis oil produced by the technology can be converted into high-quality low-sulfur ship fuel through refining, so that the pyrolysis oil becomes a mainstream recycling path in industry, and the combustible gas of the process byproduct is also commonly used as a heat source to be recycled in a system. However, the end utilization mode of the cracked crude carbon black still faces significant challenges as a low-quality filler for recycling, for example, a reclaimed rubber product can partially replace the original carbon black, but has low purity, poor added value, dust emission and volatile pollution in the processing process, limited low-end market capacity and unsatisfactory overall economy and environmental benefit, and can recycle heat energy as a blended fuel of a coal-fired boiler, but not only causes heat energy waste due to fine particles and low burnout rate, but also causes the carbon content of boiler ash to be increased, thereby influencing the subsequent recycling. Disclosure of Invention In view of the above, embodiments of the present invention have been developed to provide a carbon black treatment system that overcomes, or at least partially solves, the above-described problems. In order to solve the above problems, an embodiment of the present invention discloses a carbon black treatment system, comprising: the cracking system is used for receiving and cracking rubber and plastic raw materials to generate primary carbon black; the circulating fluidized bed incineration system is connected with the cracking system and is used for receiving and incinerating the primary carbon black to generate high-temperature flue gas; And the waste heat recovery system is respectively connected with the circulating fluidized bed incineration system and the cracking system, and is used for receiving the high-temperature flue gas, exchanging heat with the high-temperature flue gas, generating purified flue gas and water vapor, and generating electricity by utilizing the water vapor. Optionally, the lysis system comprises: The pretreatment device is used for receiving and pretreating the rubber and plastic raw materials and outputting raw material particles; the thermal cracking reaction device is connected with the pretreatment device and is used for receiving and cracking the raw material particles to generate primary carbon black and pyrolysis oil; the oil tank is connected with the thermal cracking reaction device and is used for receiving and storing the pyrolysis oil; and the buffer bin is connected with the thermal cracking reaction device and is used for receiving and storing the primary carbon black. Optionally, the circulating fluidized bed incineration system comprises: the material returning device is connected with the cracking system, the cyclone separator and the incinerator through pipelines and is used for receiving the primary carbon black output by the cracking system and the secondary carbon black output by the cyclone separator and conveying the primary carbon black and the secondary carbon black into the incinerator; the incinerator is connected with the material returning device through a pipeline and is used for receiving and incinerating the primary carbon black to generate high-temperature flue gas and secondary carbon black; And the cyclone separator is connected with the incinerator and is used for separating the high-temperature flue gas generated by the incinerator from the secondary carbon black. Optionally, the waste heat recovery system includes: The waste heat recovery device is connected with the circulating fluidized bed incineration system through a pipeline and is used for receiving the high-temperature flue gas and boiler feed water and exchanging heat between the high-temperature flue gas and the boiler feed water to generate water vapor and low-temperature flue gas; The flue gas purifying device is connected with the waste heat recovery device and is used for receiving and purifying the low-temperature flue gas exhausted by the waste heat recovery device; and the steam turbine generator unit is connected with the waste heat recovery device and is used for receiving and utilizing the steam to generate electricity and generating the boiler water supply and low-pressure steam. Optionally, the turbo generator set is configured to output the boiler feedwater to the waste heat recovery device; The steam turbine generator unit is also connected with the cracking system and is used for outputting low-pressure steam to t