Bio-oil preparation technology

Abstract

The invention belongs to the technical field of fuel oil, particularly relates to a bio-oil preparation technology. The bio-oil preparation technology is characterized in that the technology comprises the following steps: smashing biomass materials; drying; feeding smashed biomass materials to a screw conveyer; feeding the materials into a microwave pyrolysis reactor to be pyrolyzed; performing primary cooling on pyrolyzed products; performing gas-solid separation on high-temperature organic steam produced through pyrolysis in the microwave pyrolysis reactor to remove carbon granules and sand therein; performing secondary cooling and collecting bio-oil; performing third-time cooling and collecting oil with low-boiling point; collecting non-condensed gas for recycling. According to the invention, bio-oil is prepared by adopting the technology, and the biomass materials and carbon residues have good performance on absorbing microwave, so that the microwave heating speed is fast, outside and inside heating can be realized at the same time, and heat conduction is not needed, so that the preparation technology meets the requirements for bio-oil extraction of an optimal process; the requirement of the particle size of raw materials is lowered, so that the cost of pre-treatment is reduced; the pyrolysis temperature can be precisely controlled, and the thermal-inertia is avoided.

Description

technical field [0001] The invention belongs to the technical field of fuel oil, and in particular relates to a preparation process of biomass oil. Background technique [0002] With the excessive development of fossil energy, a series of problems such as politics, economy and environmental pollution have been caused in the world. Some people have proposed that human energy should shift from dependence on "hydrocarbons" to "carbohydrates". The reason is that the earth's photosynthesis produces The biomass cycle is about 95 billion tons of carbon per year. At present, the world's fossil resources consume 6.5-10 billion tons of carbon per year. As long as there is 10% utilization and development, it is enough for human sustainable development. Therefore, the development of biomass energy The outlook is very promising. [0003] Under the big energy strategy, the extension of the two ends with electricity as the mainstay, not only the development of fossil primary energy, but ...

AI Technical Summary

Problems solved by technology

[0020] Rotating cone reaction process, no carrier gas is required, biomass particles and inert heat carrier are added to the bottom of the rotating cone, and rapid heat is generated during the spiral upward process along the cone wall Cracking reaction, but its biggest feature is small production scale and high energy consumption;

[0021] Entrained bed reactor, propane and air are introduced into the combustion zone at the lower part of the reaction tube according to the stoichiometric ratio. The high-temperature combustion gas will quickly heat and decompose the biomass, but a large amount of high temperature The combustion gas and a large amount of non-condensable gas are the disadvantages of this device;

[0022]The circulating fluidized bed process needs to use nitrogen as the carrier gas to fluidize the heat carrier and biomass in the equipment, and the nitrogen needs to be preheated, and the amount is large , the production cost is very high, and the temperature of the whole system is not easy to control