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Hot steam synergistic bio-enzyme method used for processing wheat straw and preparing original color biomechanical pulp

A technology of mechanical pulping and hot steam is applied in the fields of pulping with inorganic alkali, fiber raw material treatment, non-woody plant/crop pulp, etc. Shortage, increased wastewater discharge, high value-added effects

Active Publication Date: 2019-05-03
QILU UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the current pulping and papermaking process, generally only wheat straw is used, and wheat leaves and leaf sheaths are removed, so it is impossible to realize the full utilization of wheat harvesting waste

Method used

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  • Hot steam synergistic bio-enzyme method used for processing wheat straw and preparing original color biomechanical pulp
  • Hot steam synergistic bio-enzyme method used for processing wheat straw and preparing original color biomechanical pulp
  • Hot steam synergistic bio-enzyme method used for processing wheat straw and preparing original color biomechanical pulp

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preparation example Construction

[0023] In the first exemplary embodiment of the present disclosure, a method for preparing biomechanical pulp by thermal steam treatment and biological enzyme treatment is provided, and the method includes the following steps:

[0024] (1) Take the waste wheat straw from the wheat grains as the raw material, mix it with the wheat straw according to the liquid ratio of 1:3-1:8, add a trace amount of alkali to make the water pH of the wheat straw 10-14, and then pass the heat Steam and hot water steam treatment process lasts for 15-60min, and the steam temperature is 100-120℃;

[0025] (2) After the hot steam treatment, the wheat straw is extruded and divided into filaments;

[0026] (3) The divided wheat straw is reacted with alkaline biological complex enzyme, the treatment temperature is 40-60℃, and the treatment time is 30-90min;

[0027] (4) Refining the wheat straw after biological treatment.

[0028] The raw material used in this disclosure is the waste wheatgrass after obtaining ...

Embodiment 1

[0048] A method for preparing primary color biomechanical pulp from wheat straw treated with hot steam and biological enzymes. In this example, a wheat grassland colored biomechanical pulp is prepared, and its preparation properties are tested.

[0049] (1) Cut the air-dried wheatgrass after physical selection and dust removal into 5cm-long spare raw materials, put them into the wheat straw processor or reactor, mix the wheat straw according to the liquid ratio of 1:5 (g / mL), and add to the mixture A small amount of alkali (NaOH or KOH) adjusts the pH value of the wheat straw water to 14.

[0050] (2) Pass in hot water steam, temperature 110℃, time 20min, dissolve a small part of hemicellulose, lignin, pectin and other substances in the wheat straw, soften the hot saturated water of the wheat straw, and soften the water content of the wheat straw at the end of the treatment. The pH value is 8.

[0051] (3) The wheat straw softened by the hot steam saturated with water is extruded on...

Embodiment 2

[0063] A method for preparing primary color biomechanical pulp from wheat straw treated with hot steam and biological enzymes. In this example, a wheat grassland colored biomechanical pulp is prepared, and its preparation properties are tested.

[0064] (1) Cut the air-dried wheatgrass after physical selection and dust removal into 4cm-long spare raw materials, put them into the wheatgrass processor or reactor, mix the wheatgrass according to the liquid ratio of 1:4 (g / mL), and add to the mixture A small amount of alkali (NaOH or KOH) adjusts the pH value of the wheat straw water to 14.

[0065] (2) Pass in hot water and steam, temperature 100℃, time 30min, so that a small part of hemicellulose, lignin and pectin can be dissolved out of wheat straw, so that the hot saturated water softens the wheat straw, and when the treatment is finished, it will soften the water content of wheat straw. The pH value is 9.

[0066] (3) The wheat straw that has been softened by hot and saturated wat...

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Abstract

The invention relates to a hot steam synergistic bio-enzyme method used for processing wheat straw and preparing an original color biomechanical pulp. According to the hot steam synergistic bio-enzymemethod, crop wheat waste is taken as a pulping raw material, hot steam is adopted to process wheat straw, a micro-amount of an alkali is added to adjusted hot water pH value to 10 to 14, when dissolving out of a part of hemicelluloses, lignin, pectin, and the like in wheat straw is realized, and wheat straw steaming hydro-thermal saturation softening is achieved, screw extrusion processing is carried out for wheat straw physical devillicating; then bio-enzyme processing is carried out for fiber further softening; and then wheat straw is subjected to pulp refining so as to obtain a product capable of satisfying requirements of original color packaging paper and paper base material production.

Description

Technical field [0001] The present disclosure belongs to the field of papermaking technology and new materials, and specifically relates to a method for preparing primary color biomechanical pulp by treating wheat straw with hot steam and biological enzymes. Background technique [0002] The statements here only provide background information related to the present disclosure, and do not necessarily constitute prior art. [0003] The paper industry is an important basic raw material industry and occupies a very important position in the national economy. It is closely related to social development and social civilization. The consumption level of paper and cardboard is one of the important indicators to measure the degree of modernization and civilization of a country. The shortage of resources in the traditional paper industry will be further highlighted. It is urgent to solve the shortage of papermaking raw materials as soon as possible. [0004] However, in the current pulping ...

Claims

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Application Information

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IPC IPC(8): D21C5/00D21H11/12D21C3/02
Inventor 田中建吉兴香王东兴王瑞明陈嘉川邵学军
Owner QILU UNIV OF TECH
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