A system for recovering carbon black and biomass-rich pyrolysis oil from waste rubber via electromagnetic pyrolysis.

Abstract

A system for recovering carbon black and biomass-rich pyrolysis oil from waste rubber by electromagnetic pyrolysis comprises: a pyrolysis device, a crude carbon black processing device, a carbon black finished product output device, a pyrolysis oil and gas processing device, and a pyrolysis gas power generation device. The pyrolysis device is composed of several pyrolysis furnaces connected in series in sections, and each pyrolysis furnace is covered by an electromagnetic heating device, which can stably control the internal heating temperature of each pyrolysis furnace in sections to carry out the pyrolysis reaction of waste rubber sheets in sections and modify them to produce crude carbon black, pyrolysis oil, and pyrolysis gas. Crude carbon black can be sent to a crude carbon black processing unit and a carbon black finished product output unit to produce recycled carbon black finished products that meet the required temperature and moisture content. The pyrolysis oil and pyrolysis gas can be processed by a pyrolysis oil and gas treatment unit to produce pyrolysis oil rich in biomass components and non-condensable pyrolysis gas. This pyrolysis gas can be sent to a pyrolysis gas power generation unit to provide fuel for the generator. The electricity generated by the generator can provide power for the electromagnetic heating of the pyrolysis equipment. The heat emitted by the generator is recovered as waste heat and used as a heat source for drying the carbon black finished product. This allows for the successful and complete pyrolysis reaction of waste rubber, with high thermal efficiency and energy-saving effects. Furthermore, the integrated and continuous operation effectively improves recycling efficiency and the quality of the carbon black finished product.

Claims

1. A system for recovering carbon black and biomass-rich pyrolysis oil from waste rubber by electromagnetic pyrolysis, comprising: a pyrolysis unit, which is composed of several pyrolysis furnaces arranged in sections, for thermally pyrolyzing crushed waste rubber sheets under high temperature and anaerobic conditions to produce crude carbon black, pyrolysis oil, and pyrolysis gas; and a crude carbon black processing device, connected to the pyrolysis unit, comprising: a circular screen, a magnetic separator, a magnetic rod, and a crude carbon black temporary storage tank, for screening the crude carbon black fed from the pyrolysis unit to a... The process involves determining the particle size and magnetically separating the steel wires and metal impurities contained within; a carbon black finished product production device, connected to the coarse carbon black processing device, comprising: a grinding and classifying machine, a grinding dust collector, a buffer collection tank, a granulator, and a drying furnace, used to grind the fed coarse carbon black into fine powder, and then collect and granulate it, so that after drying, recycled carbon black finished product is produced; a pyrolysis oil and gas processing device, connected to the pyrolysis equipment, and comprising: a pyrolysis oil spray cooling device, A condenser, a pyrolysis oil settling tank, and a pyrolysis oil filtration device are used to condense the pyrolysis oil and pyrolysis gas produced by the pyrolysis reaction, producing pyrolysis oil rich in biomass and pyrolysis gas that cannot be condensed; and a pyrolysis gas power generation device, comprising: a pyrolysis gas storage tank, a pyrolysis gas filter, a pyrolysis gas desulfurization absorption tower, a generator, and a waste heat recovery unit, and connected to the condenser, for filtering the pyrolysis gas that cannot be condensed to remove fine carbon black particles and oil droplets, and reducing the concentration of hydrogen sulfide in the pyrolysis gas; characterized in that: each pyrolysis furnace body of the pyrolysis equipment is covered by an electromagnetic heating device, which uses electricity as a heat source, and can stably control the heating temperature of each pyrolysis furnace body in stages to smoothly carry out the complete thermal pyrolysis reaction, and the produced pyrolysis gas that cannot be condensed can be filtered and the concentration of hydrogen sulfide reduced to provide fuel for the generator to generate electricity, and the electricity generated by the generator can be fed back to the pyrolysis equipment to provide power for the electromagnetic heating devices of each pyrolysis furnace body.

2. The system for recovering carbon black and biomass-rich pyrolysis oil from waste rubber by electromagnetic pyrolysis as described in claim 1, wherein the heating temperature of each pyrolysis furnace in the pyrolysis equipment is maintained between 300°C and 550°C, and the last pyrolysis furnace system is heated to the highest temperature.

3. The system for recovering carbon black and biomass-rich pyrolysis oil from waste rubber by electromagnetic pyrolysis as described in claim 1, wherein the circular screen is equipped with a screen that can be driven to move forward and spread out the input coarse carbon black, so that coarse carbon black particles smaller than the screen mesh can fall through the screen to the magnetic separator, while coarse carbon black particles larger than the screen mesh can be discharged from the end opening as the screen moves, and then fed back into the pyrolysis equipment for further pyrolysis.

4. The system for recovering carbon black and biomass-rich pyrolysis oil from waste rubber by electromagnetic pyrolysis as described in claim 1, wherein a rotor is provided at the center of the magnetic separator. The rotor can rotate in a certain direction and has a magnet inside, so that the falling coarse carbon black particles can be conveyed along the direction of rotor rotation, and the steel wires or other metal impurities contained therein are magnetically attracted and continue to rotate with the rotor. When the rotor rotates to the angle of no magnetism, the steel wires and other metal impurities and the coarse carbon black and other non-metallic materials can fall off from the outlet nozzles on different sides respectively.

5. The system for recovering carbon black and biomass-rich pyrolysis oil from waste rubber by electromagnetic pyrolysis as described in claim 1, wherein the waste heat recovery unit is connected to the drying furnace to recover heat from the hot air emitted by the generator and discharge it, and directly introduces the generated hot air into the drying furnace as a heat source for drying the carbon black product.

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