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Method for preparing natural-color bio-mechanical pulp by treating wheat straw with hot steam and biological enzyme and fully utilizing byproducts

A technology of hot steam and mechanical pulp, applied in the field of papermaking technology and comprehensive utilization of waste, can solve the problems of by-products that are not well solved, and is not conducive to the comprehensive high-value utilization of agricultural straws, so as to save energy consumption for refining, Realize economic and social benefits and eliminate the effect of incineration

Pending Publication Date: 2021-05-07
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problem of by-products produced in the pulping process has not been well resolved, which is not conducive to the comprehensive high-value utilization of agricultural straw

Method used

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  • Method for preparing natural-color bio-mechanical pulp by treating wheat straw with hot steam and biological enzyme and fully utilizing byproducts
  • Method for preparing natural-color bio-mechanical pulp by treating wheat straw with hot steam and biological enzyme and fully utilizing byproducts
  • Method for preparing natural-color bio-mechanical pulp by treating wheat straw with hot steam and biological enzyme and fully utilizing byproducts

Examples

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preparation example Construction

[0024] In a first typical embodiment of the present invention, a method for preparing biomechanical pulp and by-products fully utilized by hot steam treatment in conjunction with biological enzyme treatment is provided, and the method includes the following steps:

[0025] (1) Use the waste wheat straw after obtaining wheat grain as the raw material, mix it with the wheat straw according to the liquid ratio of 1:3-1:8, add a small amount of KOH, make the pH value of the water in the wheat straw 10-14, and then pass it into the hot water Water steam, the hot water steam treatment process lasts for 15-60 minutes, and the steam temperature is 100-120°C; collect lye wastewater, and collect rotten leaves and straw that cannot be used for processing;

[0026] (2) After the hot steam treatment is finished, the wheat straw is rolled and divided into silk; the waste water of the silk rubbing section is collected;

[0027] (3) Act on the divided wheat straw and the alkaline biological c...

Embodiment 1

[0046] Example 1: A preparation method for fully utilizing biomechanical pulp and by-products through hot steam treatment and biological enzyme treatment. This example prepares natural color biomechanical pulp of wheat straw and simultaneously prepares biomass compound fertilizer.

[0047] (1) Cut the air-dried wheat straw after physical selection and dedusting into 5cm-long spare raw materials, put it into the wheat straw processor or reaction kettle, mix the wheat straw according to the liquid ratio of 1:5 (g / mL), and add A small amount of alkali KOH, adjust the pH value of the water content of the wheat straw at 14; collect the rotten leaves and straw that cannot be used for processing;

[0048] (2) Feed hot water steam at a temperature of 110°C for 20 minutes to dissolve a small amount of hemicellulose, lignin, pectin and other substances in the wheat straw, soften the wheat straw with hot saturated water, and soften the water content of the wheat straw at the end of the tr...

Embodiment 2

[0057] Example 2: A preparation method for fully utilizing biomechanical pulp and by-products through hot steam treatment and biological enzyme treatment. This example prepares wheat straw natural color biomechanical pulp and simultaneously prepares biomass compound fertilizer.

[0058] (1) Cut the air-dried wheat straw after physical selection and dedusting into 4cm-long spare raw materials, put it into the wheat straw processor or reaction kettle, mix the wheat straw according to the liquid ratio of 1:4 (g / mL), and add A small amount of alkali KOH is used to adjust the pH value of the wheat straw to 14; the rotten leaves and straws that cannot be processed and used are collected.

[0059] (2) Feed hot water steam at a temperature of 100°C for 30 minutes to dissolve a small amount of hemicellulose, lignin, pectin and other substances in the wheat straw, soften the wheat straw with hot saturated water, and soften the water content of the wheat straw at the end of the treatment ...

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Abstract

The invention relates to a method for preparing natural-color biological mechanical pulp and byproducts by treating wheat straw through hot steam and biological enzyme, and belongs to the technical field of papermaking technology and comprehensive utilization of waste. The invention provides a method for preparing the high-strength natural-color biological mechanical pulp by using the whole wheat straw as a raw material and treating the whole wheat straw with hot water and alkaline bio-enzyme, so that the requirements of producing natural-color packaging paper and paper-based materials are met, byproducts are recycled to prepare the biomass compound fertilizer, solid waste is turned into wealth, and high-valued full utilization of the wheat straw is realized. The preparation method is simple, green, clean and efficient, and has good practical application value and wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of papermaking technology and waste comprehensive utilization, and in particular relates to a method for preparing uncolored biomechanical pulp and by-products by treating wheat straw with hot steam and biological enzymes. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] The paper industry is not only a consumer goods industry, but also an important basic raw material industry, involving many fields such as life, culture and education, industry and agriculture, national defense and aviation. In 2016, my country's pulp imports reached 21.06 million tons, and waste paper imports reached 28.5 million tons. my...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C5/00D21C1/02D21C1/06D21B1/16C05G5/12C05G1/00
CPCD21C5/005D21C1/02D21C1/06D21B1/16C05B17/00C05G5/12C05F7/00C05F11/00Y02P70/10D21C9/002D21C9/007D21C9/004D21H11/12D21H27/00D21H27/10D21H11/18D21H11/08
Inventor 吉兴香陈嘉川田中建王瑞明王东兴刘玉
Owner QILU UNIV OF TECH
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