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Straw component separation and straw component full utilization method

A technology for separation of straw and steam explosion, applied in the direction of raw material separation, etc., can solve the problems of complex separation process, high energy consumption, low yield of extract, etc., and achieve the effect of comprehensive utilization, thorough separation and simple process

Active Publication Date: 2015-03-11
JINAN MIDUOTAN NEW ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The separation process is complex, and dehydration after washing consumes a lot of energy; in addition, this method uses microwave treatment, which endangers the health of operators
[0007] At present, the utilization rate of straw is still relatively low, the yield of extract is low, the production cost is high, and the environmental pollution is serious. Therefore, it is of great significance to develop a process method that is pollution-free and has a high utilization rate of straw.

Method used

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  • Straw component separation and straw component full utilization method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The method for separating straw components and fully utilizing straw components comprises the following steps:

[0039] 1) Straw pretreatment

[0040] Weigh 500kg of rice stalks, and then cut, dedust and wash the stalks;

[0041] 2) Extraction of hemicellulose

[0042] Put the straw pretreated in step 1) into the steam explosion separator, add 60kg of sodium hydroxide solution with a mass fraction of 3% to the steam explosion separator, close the steam explosion separator and feed steam, and conduct The first steam explosion; the conditions for the first steam explosion are: temperature 120°C, pressure 1.2MPa, time 40min; after the first steam explosion is completed, press filter the sprayed material, and the clear liquid obtained after the press filter is Hemicellulose crude liquid, collect solid residue;

[0043] 3) Extraction of cellulose and lignin

[0044] Put the solid slag obtained in step 2) in a steam explosion separator, add 60kg of sodium hydroxide soluti...

Embodiment 2

[0053] The method for separating straw components and fully utilizing straw components comprises the following steps:

[0054] 1) Straw pretreatment

[0055] Weigh 500kg of wheat straw, cut, dust and wash the straw respectively;

[0056] 2) Extraction of hemicellulose

[0057] Put the straw pretreated in step 1) into the steam explosion separator, add 80kg of sodium hydroxide solution with a mass fraction of 5% to the steam explosion separator, close the steam explosion separator and feed steam, and conduct The first steam explosion; the conditions for the first steam explosion are: temperature 200°C, pressure 1.8MPa, time 40min; after the first steam explosion is completed, press filter the sprayed material, and the clear liquid obtained after the press filter is Hemicellulose crude liquid, collect solid residue;

[0058] 3) Extraction of cellulose and lignin

[0059] Place the solid slag obtained in step 2) in a steam explosion separator, add 90kg of sodium hydroxide sol...

Embodiment 3

[0068] The method for separating straw components and fully utilizing straw components comprises the following steps:

[0069] 1) Straw pretreatment

[0070] Weigh 500kg corn stalks, cut, dust and wash the stalks respectively;

[0071] 2) Extraction of hemicellulose

[0072] Put the straw pretreated in step 1) into the steam explosion separator, add 50kg of sodium hydroxide solution with a mass fraction of 10% to the steam explosion separator, close the steam explosion separator and feed steam, and conduct The first steam explosion; the conditions for the first steam explosion are: temperature 200°C, pressure 2.0MPa, time 20min; after the first steam explosion is completed, press filter the sprayed material, and the clear liquid obtained after the press filter is Hemicellulose crude liquid, collect solid residue;

[0073] 3) Extraction of cellulose and lignin

[0074] Put the solid slag obtained in step 2) in a steam explosion separator, add 50kg of sodium hydroxide soluti...

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Abstract

The invention discloses a straw component separation and straw component full utilization method, and relates to the technical field of straw comprehensive utilization. According to the method, straws are subjected to a steam explosion treatment, such that hemicellulose is first separated; and the rest of the material after hemicellulose extraction is subjected to steam explosion treatment again, such that the separation of cellulose and lignin is realized. The method has the advantages of simple process, environment-friendliness, low cost, and thorough separation of hemicellulose, cellulose and lignin. With the method provided by the invention, an environment-friendly separation technology of cellulose and lignin is realized for the first time internationally, and a basis is provided for full-element, high-added-value and comprehensive utilization of straws. On the basis, products with higher added values can be derived or generated. With the production process provided by the invention, all wastewater is treated and is completely recycled, and all waste residue is used for producing organic fertilizers, such that straws are thoroughly utilized, and straw component full utilization is realized. Also, zero emission and zero pollution are realized, such that the difficulty of straw comprehensive utilization is solved.

Description

technical field [0001] The invention relates to the technical field of straw comprehensive utilization, in particular to a method for separating and fully utilizing straw components. Background technique [0002] The crops have a short growth cycle and a large yield. As an agricultural by-product, straw is an inexhaustible renewable natural resource. Biomass resources are not only renewable, but also have good biocompatibility and biodegradability. At present, straw is mostly used as a whole, such as straw power generation, straw incineration, straw production of ethanol, etc., with low added value, which can only be maintained by state financial subsidies, so the utilization of straw is limited. [0003] The straw includes the stems, leaves, skins (shells) of crops such as wheat, corn, rice, cotton, sorghum, soybeans, peanuts, pastures such as alfalfa and sandavan, and aquatic plants such as reeds. [0004] Generally, straw is mainly composed of cellulose, hemicellulose, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21B1/36C08B37/14C08H7/00
CPCC08B37/0003C08H8/00D21B1/36
Inventor 曹吉祥
Owner JINAN MIDUOTAN NEW ENERGY TECH
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