| CPC F02G 5/04 (2013.01) | 7 Claims |
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1. An energy storage device for biomass cascade pyrolysis coupled with new energy power generation, comprising a feeding system, a cascade pyrolysis system, a post-treatment system and an output system, wherein
the feeding system comprises a biomass feedstock bin, a feedstock-conveying device, a first gas locker and a second gas locker sequentially connected;
the cascade pyrolysis system comprises a low-temperature pyrolysis device and a high-temperature pyrolysis device; the low-temperature pyrolysis device is connected with a heat transfer oil storage box, wherein a circulating heat transfer oil is introduced into the heat transfer oil storage box to provide heat required for low-temperature pyrolysis; wherein a heat source of the heat transfer oil storage box comes from an electric energy of a new energy power generation system, an exhaust heat energy of a power generation system and a high-temperature heat energy recovered from a condensation system and a high-temperature storage bin, comprising 1): the new energy power generation system heats the heat transfer oil storage box by electric heating; 2) an exhaust discharged by a power generator in the power generation system goes through the heat transfer oil storage box, and a heat energy in the high-temperature exhaust is recovered and transferred to the heat transfer oil in the heat transfer oil storage box; 3) a liquid side of a first gas-liquid heat exchanger in the condensation system is connected with the heat transfer oil storage box, and an inlet of a gas side is connected with a high-temperature pyrolytic gas to recover a heat in the high-temperature pyrolytic gas for the heat transfer oil storage box of the low-temperature pyrolysis device; 4) the high-temperature storage bin is configured to store bio-char delivered by the high-temperature pyrolysis device and with a circulating nitrogen introduced as a heat exchange medium inside, to recover and convey a high-temperature heat energy in the high-temperature bio-char to the heat transfer oil in the heat transfer oil storage box;
the post-treatment system comprises a condensation system, a power generation system, and an exhaust treatment device, and the power generation system comprises a booster fan, an internal combustion engine and a power generator;
the output system comprises a high-temperature storage bin and a low-temperature storage bin, and the high-temperature storage bin is configured to store the bio-char delivered by the high-temperature pyrolysis device and the pre-cooled bio-char is discharged by the high-temperature storage bin into the low-temperature storage bin; wherein an electric energy required by the high-temperature pyrolysis device is supplied by the new energy power generation system;
the electric energy required by various systems of the energy storage device for the biomass cascade pyrolysis is supplied by the new energy power generation system and comprises a mechanical energy, a heat energy and an electric energy required by various systems;
when the new energy power generation system aims to realize stable electric energy output, the energy storage device for the biomass cascade pyrolysis further comprises a mixing device, the condensation system comprises a first gas-liquid heat exchanger, a spray tower heat exchanger and a gas storage tank sequentially connected, a high-temperature pyrolytic gas outlet of the high-temperature pyrolysis device is connected with an inlet of the first gas-liquid heat exchanger, an outlet of the first gas-liquid heat exchanger and a low-temperature pyrolytic gas outlet of the low-temperature pyrolysis device are both connected with an inlet of the spray tower heat exchanger, and the mixing device mixes a bio-oil captured by the condensation system with the bio-char from the low-temperature storage bin to prepare a slurry fuel;
when the new energy power generation system aims to consume redundant electric energy, the energy storage device for the biomass cascade pyrolysis further comprises a hydrogen making device, the condensation system comprises a first gas-liquid heat exchanger, a second gas-liquid heat exchanger, a spray tower heat exchanger and a gas storage tank sequentially connected, the high-temperature pyrolytic gas outlet of the high-temperature pyrolysis device is connected with the inlet of the first gas-liquid heat exchanger, the low-temperature pyrolytic gas outlet of the low-temperature pyrolysis device is connected with an inlet of the second gas-liquid heat exchanger, an outlet of the second gas-liquid heat exchanger is connected with the inlet of the spray tower heat exchanger, the high-temperature pyrolytic gas of the high-temperature pyrolysis device sequentially runs through the first gas-liquid heat exchanger, the second gas-liquid heat exchanger, and the spray tower heat exchanger to produce low-temperature, medium-temperature and high-temperature bio-oils by three-stages condensation mode, the low-temperature pyrolytic gas of the low-temperature pyrolysis device is connected to the condensation system through the second gas-liquid heat exchanger to produce the medium-temperature and high-temperature bio-oils sequentially by condensation, the medium-temperature and low-temperature bio-oils produce corresponding products by hydrogen added by the hydrogen making device, and the high-temperature bio-oil is configured to subsequently prepare an electrochemical high-quality activated carbon;
a bottom liquid outlet of the spray tower heat exchanger is configured to output a condensed bio-oil, and a top gas outlet is connected with the gas storage tank; an outlet of the gas storage tank is connected with an inlet of the booster fan; an outlet of the booster fan is connected with the internal combustion engine; the internal combustion engine is connected with the power generator; the power generator supplies power to the high-temperature pyrolysis device;
an exhaust of the internal combustion engine sequentially flows through the low-temperature pyrolysis device and the biomass feedstock bin for recovery of heat energy in the exhaust and is discharged after being treated by the exhaust treatment device;
wherein a heat exchange amount of the first gas-liquid heat exchanger in the condensation system is configured to heat the heat transfer oil for use by the low-temperature pyrolysis device, and heat exchange amounts of the second gas-liquid heat exchanger and the spray tower heat exchanger are configured to dry and preheat a raw biomass in the biomass feedstock bin.
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