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A method and device for extracting xylooligosaccharides from straw with steam explosion pretreatment

A xylooligosaccharide and pretreatment technology, which is applied in the direction of xylose production, sugar production, sugar production, etc., can solve the problems of staff hazards, noise pollution, straw intermingling, etc., to achieve easy separation and recycling, and to protect health , Ease of use

Inactive Publication Date: 2021-09-24
ZHENGZHOU TECHN COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many kinds of steam explosion devices, such as the Chinese patent whose publication number is CN 106192507A discloses a kind of instant blasting straw processing device, and the Chinese patent whose publication number is CN 103451985B discloses a multi-stage single-spiral continuous steam explosion device for plant fibers etc., the materials are directly stacked at the bottom of the steam explosion device, and the steam is not easy to penetrate into the straw quickly and evenly, which may easily lead to the straw after the steam explosion. At present, there are few studies on reducing the noise generated by the steam explosion device. The sound is too loud during the process, which is harmful to the staff and also brings noise pollution to the surrounding environment. The current preparation process directly evacuates the steam released by the instantaneous pressure relief after the steam explosion, which fails to effectively utilize the energy of the steam. cause energy waste

Method used

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  • A method and device for extracting xylooligosaccharides from straw with steam explosion pretreatment
  • A method and device for extracting xylooligosaccharides from straw with steam explosion pretreatment
  • A method and device for extracting xylooligosaccharides from straw with steam explosion pretreatment

Examples

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Effect test

Embodiment 1

[0034] Such as figure 1 As shown, a method for extracting xylooligosaccharides from steam explosion pretreatment stalks comprises the following steps:

[0035] a. Material preparation: Take the straw and add it to the pulverizer 1 for mechanical crushing. The crushed straw does not exceed 3 cm. Pour the crushed straw into the preheating tank 2, and use the steam tank 3 to deliver steam to the warm up;

[0036] b. Steam explosion treatment: Add the straw preheated in step a directly into the steam explosion tank 4, seal it, and use the steam tank 3 to transport steam to the steam explosion tank 4 to a temperature of 208-223°C and a pressure of 1.3-1.5MPa, and maintain 90 ~105 seconds, rapid pressure release, steam returns to preheating tank 2 to preheat straw, and the material is released into the atmospheric pressure container 5 with water inside;

[0037] c. Filtration: the material in the step b atmospheric pressure vessel is filtered through the plate and frame filter pre...

Embodiment 2

[0042] Such as Figure 2 to Figure 7 As shown, a device for extracting xylo-oligosaccharides from straw with steam explosion pretreatment includes a pulverizer 1, a steam tank 3, a steam explosion tank 4, an atmospheric pressure vessel 5, a plate and frame filter press 7, a decolorization tank 8, and a reaction kettle 9 and evaporation crystallizer 10, also includes noise reduction tank 6 and preheating tank 2, described pulverizer 1, is used for the mechanical pulverization of straw; Provide steam; the atmospheric pressure container 5 is used to accept and rapidly cool the material after the steam explosion; the plate and frame filter press 7 is used to remove the solid slag in the blasting material; the decolorization tank 8 is used to remove Impurities of the filtrate obtained in step c; the reaction kettle 9 is used for the degradation of the xylan solution to prepare the xylooligosaccharide solution; the evaporation crystallizer 10 is used for evaporating and concentratin...

Embodiment 3

[0044] Such as Figure 1 to Figure 7 As shown, a method for extracting xylo-oligosaccharides from steam-explosion pretreated straws and its device, a method for extracting xylo-oligosaccharides from steam-explosion pretreated straws includes the following steps:

[0045] a. Material preparation: Take the straw and add it to the pulverizer 1 for mechanical crushing. The crushed straw does not exceed 3 cm. Pour the crushed straw into the preheating tank 2, and use the steam tank 3 to deliver steam to the warm up;

[0046] b. Steam explosion treatment: Add the straw preheated in step a into the steam explosion tank 4, seal it, use the steam tank 3 to transport steam to the steam explosion tank 4 to a temperature of 208-223°C, a pressure of 1.3-1.5MPa, and maintain a temperature of 90- 105 seconds, rapid pressure relief, steam returns to the preheating tank 2 to preheat the straw, and the material is released into the atmospheric pressure container 5 with water inside;

[0047] ...

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Abstract

The invention provides a method for extracting xylo-oligosaccharides from steam-exploded pretreatment straws, which comprises the following steps: material preparation, steam-explosion treatment, filtration, decolorization, degradation, concentration, and steam-explosion treatment of straws, effectively avoiding the use of acid and alkali in traditional processes The generated wastewater pollutes the environment. The degradation process uses a sulfonic acid-type solid acid catalyst, which is easy to use, easy to separate and recycle, and can be reused without corrosion to equipment. A steam explosion pretreatment device for extracting xylooligosaccharides from straw, including a pulverizer, a steam tank, a steam explosion tank, an atmospheric pressure vessel, a plate and frame filter press, a decolorization tank, a reaction kettle, and an evaporation crystallizer, as well as a noise reduction Tank and preheating tank, the preheating tank can effectively recover the steam after the steam explosion to preheat the straw, the noise reduction tank can effectively reduce the noise of the steam explosion process, and the steam explosion tank can effectively ensure that the steam penetrates into the material evenly to ensure the steam explosion effect.

Description

technical field [0001] The invention relates to the technical field of biomass pretreatment, in particular to a method and a device for extracting xylooligosaccharides from steam explosion pretreatment straw. Background technique [0002] Xylooligosaccharides, also known as xylooligosaccharides, are functional polymeric sugars composed of 2-7 xylose molecules combined with β-1,4 glycosidic bonds, which can selectively promote the proliferation of intestinal bifidobacteria. The raw material for the preparation of xylooligosaccharides is mainly hemicellulose. Crop straw is a kind of renewable organic matter, which contains abundant energy. The current methods of processing straw such as incineration and returning to the field not only waste resources, but also seriously pollute the environment. Crop straw is mainly composed of cellulose, hemicellulose, and lignin. Therefore, the use of straw to prepare xylo-oligosaccharides can increase the added value of agriculture and redu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C13K13/00
CPCC13K13/002
Inventor 李竹生宋娜马淑玲鲁慧芳范玉英
Owner ZHENGZHOU TECHN COLLEGE
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