System for rapidly pyrolysing and liquefying biomass

Abstract

The invention discloses a system for rapidly pyrolysing and liquefying biomass, which comprises a pyrolysis reactor, a feeding device connected with a biomass material inlet of the pyrolysis reactor, a reaction starter connected with a circulating heat supporting gas inlet, a gas-solid separation sub-system connected with a pyrolysis gas outlet of the pyrolysis reactor, a bio-oil condensing and reserving sub-system connected with a gas outlet of the gas-solid separation sub-system, and a thermal circulation medium heating and separating sub-system connected with a solid outlet of the gas-solid separation sub-system. The thermal circulation medium outlet of the thermal circulation medium heating and separating sub-system is connected with the thermal circulation medium inlet of the pyrolysis reactor, wherein the bio-oil condensing and reserving sub-system includes at least one heat exchanger that is applied for cooling partial obtained bio-oil to be used as a condensed medium of the bio-oil condensing and reserving sub-system. The system for rapidly pyrolysing and liquefying biomass can fully improve the utilization rate of biomass energy and reduce the operation cost thereof to the maximum degree.

Description

technical field [0001] The invention relates to a biomass energy conversion system, in particular to a biomass fast pyrolysis liquefaction system. Background technique [0002] With the continuous development of the world economy, energy and environmental issues have become increasingly prominent. The main energy sources currently used by human beings are oil, natural gas and coal. According to the statistics of the International Energy Agency, the lifespan of these three kinds of energy for human exploitation on the earth is only 40 years, 50 years and 240 years respectively. The development of new energy has become a major issue related to the sustainable development of human society. [0003] Biomass energy is the solar energy stored in plants by the photosynthesis of plants and solar energy. It is estimated that the annual energy stored in plants is equivalent to 10 times the world's main fuel consumption, while the utilization of energy as energy is less than 1% of t...

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Problems solved by technology

But, as can be seen from the above description, the No. CN200510057215.8 patent has the following disadvantages: first, the system needs to be equipped with a special nitrogen supply system to supply nitrogen to the pyrolysis reaction tower and heat carrier heating tower, which Increased system complexity and manufacturing cost; second, the medium used to condense the pyrolysis gas in the condenser is water, therefore, the obtained bio-oil will contain a large amount of water, and special equipment is required to use it Further separation will increase the difficulty and cost of the process; thirdly, the non-condensable gas and carrier gas from the condenser are used as recovery gas, which is directly recycled as part of the fluidization gas and heat carrier heating of the pyrolysis reaction tower A part of the combustion gas in the tower, and a part of the circulating hot carrier gas in the feeding mechanism, therefore, on the one hand, the non-condensable gas that can be used as gas fuel does not form a gas product that can be transported to the outside, which leads to a loss of value. On the other hand, This mixed recovered gas contains a lot of water and tar, but it is directly used in the subsequent process without sufficient treatment, leading to a vicious cycle, which not only leads to a decrease in the conversion rate of biomass energy, but also causes equipment damage and even safety hazards. ACCIDENT

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