Pulping process method for synchronously quenching and bleaching rice straws
A process method and technology for rice and wheat straw, which are applied to the field of synchronous pulping technology with cold soaking and bleaching of rice and wheat straw, can solve the problems of not getting easy-bleaching pulp in the pulping process, too long the pulping process flow, and poor pulping strength of the pulp. , to achieve the effect of softening the effect, shortening the pulping process, and improving the pulping strength.
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Embodiment 1
[0011] The rice and wheat straw cold-soaking and bleaching synchronous pulping process method: the chemical liquid is filled in the pool, and the weight of the purified rice and wheat straw is immersed in the chemical liquid, and it is cold-soaked at room temperature for 4~ After 6 hours, take it out and wash it, and grind, wash, remove slag, and screen the soaked rice and wheat straw to obtain a slurry. The chemical solution is a mixed solution of caustic soda, sulfonate and hydrogen peroxide dissolved in water. According to the total weight percentage of the mixed solution, the content of caustic soda is 5-10%, the content of sulfonate is 1-2%. 10-12% hydrogen oxide, wherein the amount of water used is 10-12 times the weight of the dry rice straw raw material, and the pH value of the chemical liquid is not less than 12. When the dosage of each medicine is the upper limit, the lower limit is taken for the cold soaking time; otherwise, when the dosage of each medicine is the l...
Embodiment 2
[0013] The rice and wheat straw cold-soaking and bleaching synchronous pulping process method: the chemical liquid is filled in the pool, and the weight of the purified rice and wheat straw is immersed in the chemical liquid, and it is cold-soaked at room temperature for 18~ After 20 hours, it was taken out and cleaned, and the soaked rice and wheat straw were conventionally ground, cleaned, slag-removed and screened to obtain bleached pulp. The chemical solution is a mixed solution of caustic soda, sulfonate and hydrogen peroxide dissolved in water. According to the total weight percentage of the mixed solution, the content of caustic soda is 5-10%, the content of sulfonate is 1-2%. 10-12% hydrogen oxide, wherein the amount of water used is 10-12 times the weight of the dry rice straw raw material, and the pH value of the chemical liquid is not less than 12. When the dosage of each medicine is the upper limit, the lower limit is taken for the cold soaking time; otherwise, whe...
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