High-pressure reaction kettle and control method thereof

Abstract

The invention provides a high-pressure reaction kettle and a control method thereof, the high-pressure reaction kettle comprises: a high-pressure reaction kettle cavity for accommodating biomass, a solvent and water; an ultrasonic generation device which is used for generating cavitation bubbles from an aqueous solution in thehigh-pressure reaction kettlecavity; and a high-voltage electrode assembly which is used for discharging in the high-voltage reaction kettle cavity to generate plasma; The ultrasonic generation device and the high-voltage electrode assembly have a synergistic effect, thecavitation bubbles are provided by the ultrasonic generation device, and the high-voltage electrode assembly discharges and loads on the cavitation bubbles to realize discharging and generate the plasma, so that the cavitation bubble volume is increased, the solution heating efficiency is improved, and the liquefaction effect of the content of free radicals in the cavitation bubbles is improved.

Description

technical field [0001] The invention belongs to the technical field of hydrothermal liquefaction, and relates to a reactor structure for hydrothermal liquefaction, in particular to a high-pressure reactor structure and a control method thereof. Background technique [0002] In the prior art, thermochemical conversion is mostly realized by hydrothermal method. The hydrothermal method refers to the thermochemical conversion process of treating biomass by heating water and catalysts in a closed system (under high temperature and high pressure system). According to different parameters and conditions (temperature, pressure and solution composition, etc.), the products obtained by the hydrothermal method can usually be divided into three categories: (1) Hydrothermal carbonization: when the temperature is 180-250 ° C, the pressure in the autoclave is less than 4 MPa products Mainly coke; (2) hydrothermal liquefaction: when the temperature of the solution rises to 200-370°C and th...

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Problems solved by technology

[0004] However, the hydrothermal liquefaction method under sub / supercritical conditions in the prior art also has many shortcomings, the most obvious being high energy consumption, up to 1.8 kWh per kilogram, and low heating efficiency due to the limitation of conduction heating. More than 50% of the heat is lost in the heat conduction process, followed by low efficiency. It takes 45 minutes to heat up to 200 degrees, and the subsequent catalytic liquefaction takes more than 120 minutes

The above disadvantages limit the promotion of this technology

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