Method for preparing furfural by extracting xylose through steam explosion of cotton stalks and fully utilizing furfural

Abstract

The invention provides a device for preparing furfural by extracting xylose through steam explosion of cotton stalks, which comprises a partition plate, a feeding box, a spiral steam device, a steam aerator, a pulp washer, a furfural shunting tower, a furfural rectifying tower, a furfural storage tank, supporting legs, a discharge valve, a blow-off pipe with a valve, a cotton stalk filtered impurity leading-in box structure, a furfural preparation gas antifouling treatment fan structure, a temperature control heating and heat preservation cylinder structure and a wastewater antifouling discharge treatment box structure, wherein the right upper end of the partition plate is in bolted connection with the right upper wall of the inner side of the feeding box; and an outlet at the lower part of the feeding box is in bolted connection with an inlet at the upper part of the spiral steam device. Through the arrangement of a cotton stalk hopper, a flow guide pipe, a U-shaped lining seat, a filter screen, an impurity collecting box, a drawing cover and a blocking seat, impurities can be filtered out from the cotton stalks, so that the furfural processing and preparing efficiency is guaranteed; and by arranging an adsorption net, a gas outlet pipe, a treatment box, a cleaning bottom cover, an adsorption core and an exhaust fan, waste gas can be released and treated, so that environmental pollution is avoided.

Description

technical field [0001] The invention belongs to the technical field of plant extraction, and in particular relates to a method for extracting xylose by steam explosion of cotton stalks to prepare furfural and fully utilizing it. Background technique [0002] Furfural is an important basic organic chemical raw material that cannot be synthesized by chemical methods at present; it is also the only unsaturated organic chemical with large specific volume obtained from sugar compounds, and its chemical properties are very active. Furfural and its Derivatives are widely used organic chemical intermediates. In addition, furfural can also generate 5-hydroxymethylfurfural through hydroxymethylation with formaldehyde, and can also be used as a raw material to prepare gasoline, diesel and aviation kerosene. Methyl tetrahydrofuran generated by furfural through hydrogenation can be directly used as gasoline Binder. With the increasingly severe energy crisis and environmental problems w...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the above-mentioned technical problems, the present invention provides a method for extracting xylose by steam explosion of cotton stalks to prepare furfural and make full use of it, so as to solve the problems of existing methods for extracting xylose by steam explosion of cotton stalks to prepare furfural and make full use of it. Cotton stalks have poor filtering effect, and improper treatment of the generated gas will easily pollute the environment. Wastewater cannot be treated, the temperature control effect is poor, and the operation method is complicated. A device for extracting xylose and preparing furfural by steam explosion of cotton stalks, including clapboards , feed box, spiral steamer, steam aerator, pulp washer, furfural splitter tower, furfural rectification tower, furfural storage tank, support legs, discharge valve, sewage pipe with valve, cotton stalk filter miscellaneous import box structure, Furfural preparation gas anti-pollution treatment fan structure, temperature-controlled heating insulation cylinder structure and waste water anti-pollution discharge treatment box structure, the upper right end of the partition is bolted to the inner upper right wall of the feed box; the lower outlet of the feed box Bolts are connected to the upper inlet of the spiral steamer; the spiral steamer is installed on the upper end of the pulp washer through the steam aerator; the bolts of the pulp washer are connected to the upper end of the furfural splitter tower; the furfural splitter The longitudinal lower end of the tower is bolted to the upper entrance of the furfural rectification tower; the lower end of the furfural rectification tower is bolted to the upper end of the furfural storage tank; the bottom four corners of the furfural storage tank are bolted to support legs; The left end of the discharge valve is bolted to the right outlet of the furfural storage tank; the right end of the drain pipe with valve is screwed to the lower left outlet of the furfural storage tank; the cotton stalk filter miscellaneous introduction box structure and furfural preparation The gas anti-pollution treatment fan structure is connected with the feed box; the temperature-controlled heating insulation cylinder structure is connected with the furfural splitter tower; the waste water anti-pollution discharge treatment box structure is connected with the sewage pipe with valve; The structure of the cotton stalk filter introduction box includes a cotton stalk bucket, a diversion pipe, a U-shaped bushing seat, a filter screen, a collection box, a pull-out cover and a retaining seat. The left end entrance of the cotton rod bucket; the inner upper left wall bolt of the cotton rod bucket is connected with a U-shaped bushing; the left upper end of the filter screen is axially connected to the inside of the U-shaped bushing; the retaining seat bolt is connected to the cotton rod The inner middle and lower side of the connection between the bucket and the diversion pipe; the collection box is plugged into the inner lower part of the cotton rod bucket and the diversion pipe; the longitudinal screw of the pull-out cover is connected to the left end of the collection box

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