a co 2 Biomass continuous hydrothermal furfural preparation system and method under atmosphere

Abstract

The invention discloses a system for preparing furfural from biomass through a continuous hydrothermal reaction in the atmosphere of CO2. The system comprises a raw material conveyor (6), a coil typereaction kettle (10) and a centrifugal machine (17); the raw material conveyor (6) comprises a feeding valve (4), a storage tank (5), a discharging valve (1) and a slurry conveyor (26); the coil typereaction kettle (10) is provided with a coil type reactor (9), a heating sleeve (8) sleeves the coil type reactor (9), and a CO2 pipeline (23) is arranged in the center of the coil type reactor (9); an exhaust port (16), a liquid outlet (21) and a solid phase outlet (20) are formed in the centrifugal machine (17), and the exhaust port (16) and the CO2 pipeline (23) are in butt joint. The continuous hydrothermal reaction is realized. The invention further discloses a method for preparing furfural from biomass through the continuous hydrothermal reaction in the atmosphere of CO2. The problems are solved that in an existing continuous reaction, operation is complex, and heating is not uniform, and product quality is improved effectively.

Description

technical field [0001] The invention belongs to the field of biomass hydrothermal technology, and more specifically relates to a CO 2 System and method for continuous hydrothermal furfural preparation from biomass under atmosphere. Background technique [0002] Furfural is the most important derivative of the furan ring system. It is chemically active and can produce numerous derivatives through oxidation and condensation reactions. It is widely used in synthetic plastics, medicine, pesticides and other industries. Biomass is rich in hemicellulose, which can be degraded into furfural by hydrolysis, liquefaction or pyrolysis. Due to the rich source of biomass and low cost, biomass has great potential in preparing furfural. potential. [0003] At present, there are three main process forms of furfural preparation from biomass: batch, continuous and fluidized bed. The batch type is easy to operate, but it belongs to high-temperature, high-pressure chemical reaction, and the ...

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Problems solved by technology

[0005] To address the above defects or improvement needs of the prior art, the present invention provides a CO 2 Biomass continuous hydrothermal furfural preparation system under atmosphere, by optimizing hydrothermal reaction equipment, adopts raw material conveyor, coil reactor and centrifuge as the main structure, and is equipped with feed valve, discharge valve, throttle valve, stop Coordinated control of return valves, reasonable regulation of hydrothermal reaction parameters, so as to realize continuous biomass hydrothermal reaction and efficiently prepare furfural products. This invention can solve the problems of complicated operation and uneven heating in the current continuous reaction, and can effectively improve product quality and optimize Device efficiency

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