Device and process for mixing micro-alga and rice husk to produce oil by aid of continuous hydrothermal method

Abstract

The invention belongs to the field of biomass energy, and particularly relates to a device and a process for mixing micro-alga and rice husk to produce oil by the aid of a continuous hydrothermal method.The process includes feeding the micro-alga and the rice husk into a stirring tank, then stirring the micro-alga and the rice husk until the micro-alga and the rice husk are in slurry states, feeding the micro-alga and the rice husk into an upper storage tank along with nitrogen which is sweeping gas, then feeding the micro-alga and the rice husk into a lower storage tank, feeding the micro-alga and the rice husk into a hydrothermal reaction kettle by the aid of a spiral feeding device at the bottom of the lower storage tank and liquefying the micro-alga and the rice husk in the hydrothermal reaction kettle by means of high-temperature and high-pressure hydrolysis to obtain products; separating the products to obtain gas phases, liquid phases and solid phases, carrying out reaction, respectively feeding high-temperature steam, the gas phases and the liquid phases into a gas-liquid separator from the top and the bottom of the reaction kettle, separating separated liquid products into oil phases and water phases, directly draining the water phases and collecting and utilizing the oil phases; discharging solid residues in the solid-phase hydrothermal reaction kettle out of the bottom of the reaction kettle.

Description

technical field [0001] The invention belongs to the field of biomass energy, and in particular relates to a device and a process for mixing microalgae and rice husks for continuous hydrothermal oil production. technical background [0002] Biomass energy has many advantages such as clean and renewable. Rational development and utilization of biomass energy can not only reduce dependence on traditional fossil fuels, but also reduce environmental pollution and alleviate the greenhouse effect. The utilization methods of biomass liquefaction can be divided into pyrolysis liquefaction and hydrolysis liquefaction. Pyrolysis liquefaction is suitable for terrestrial biomass with low water content such as straw and rice husk, while hydrolysis liquefaction is suitable for aquatic biomass with high water content such as seaweed and microalgae. Biomass with high water content is hydrolyzed and liquefied without dehydration and drying, which can save energy. Since the current hydrolys...

AI Technical Summary

Problems solved by technology

Since the current hydrolysis and liquefaction are almost all intermittent operations of high-pressure reactors, it is difficult to achieve large-scale production and utilization, so it is particularly important to research and develop continuous hydrothermal reaction devices

Images