Method for preparing natural biomechanical pulp from wheat straw treated by hot steam combined with biological enzyme
A technology of mechanical pulping and hot steam, applied in the direction of using microorganism/enzyme cellulose treatment, raw material pretreatment, fiber raw material treatment, etc., can solve the problem of inability to realize the full utilization of wheat harvesting waste, and solve the shortage of papermaking fiber raw materials, Achieve economic and social benefits and avoid pollution
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[0023] In a first typical embodiment of the present disclosure, a method for preparing biomechanical pulp by hot steam treatment and biological enzyme treatment is provided, the method includes the following steps:
[0024] (1) Use the waste wheat straw after obtaining wheat grain as raw material, mix it with the wheat straw according to the liquid ratio of 1:3-1:8, add a small amount of alkali, 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 15-60min, and the steam temperature is 100-120°C;
[0025] (2) After the hot steam treatment is finished, the wheat straw is rubbed and divided;
[0026] (3) Acting on the divided wheat straw and the alkaline biological complex enzyme, the treatment temperature is 40-60°C, and the treatment time is 30-90min;
[0027] (4) Refining the biologically treated wheat straw.
[0028] The raw material used in this disclosure is the waste whe...
Embodiment 1
[0046] Example 1: A method of treating wheat straw with hot steam and biological enzymes to prepare uncolored biomechanical pulp. This example prepares uncolored biomechanical pulp from wheat straw and tests its pulping performance.
[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 NaOH is used to adjust the pH value of the wheatgrass water to 14.
[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 treatment The pH is at 8.
[0049] (3) Roll the wheat straw TSP360 thread rolling machine that is saturated and softened by ho...
Embodiment 2
[0060] Example 2: A method of treating wheat straw with hot steam and biological enzymes to prepare uncolored biomechanical pulp. This example prepares uncolored biomechanical pulp from wheat straw and tests its pulping performance.
[0061] (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 adjusts the pH value of the water in the wheatgrass to 14.
[0062] (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 The pH is at 9.
[0063] (3) Roll the wheat straw softened by hot saturated water on the TSP360 thread rolling machine, ...
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