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Energy-saving, environmental-protection and resourced pulping method of plant fibers

A technology of plant fiber and resource utilization, which is applied in the fields of energy saving, environmental protection, and resource utilization of plant fiber, which can solve the problems of lack of comprehensive utilization of waste and wastewater, achieve high bonding strength, reduce consumption, and improve pulp quality.

Active Publication Date: 2015-04-22
武长安 +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above pulping method can extract most of the pentosan in bamboo, but there is still a lack of comprehensive utilization of waste and wastewater.

Method used

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  • Energy-saving, environmental-protection and resourced pulping method of plant fibers
  • Energy-saving, environmental-protection and resourced pulping method of plant fibers
  • Energy-saving, environmental-protection and resourced pulping method of plant fibers

Examples

Experimental program
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Effect test

Embodiment 1

[0036] In this embodiment, rice straw is used as the plant fiber raw material, and its pulping method is as follows: figure 1 shown.

[0037] The straw is cut by a grass cutter, and the length of the raw material after cutting is 2-4cm; after washing and dedusting, it is squeezed dry, and the extruded washing water is further used for washing and dedusting of plant fiber raw materials after sedimentation treatment, and the sediment of the washing water is used as fertilizer.

[0038] Put the cut, washed, dedusted and squeezed straw material into the spiral preprocessor at a flow rate of 1000Kg / h, and spray 1Kg of HZ additive and 300Kg of dilute lye with a concentration of 4% at the same time. The treatment temperature is 90°C and the treatment time is 30 minute. HZ composite additive is a compound of fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether and sodium alkylbenzene sulfonate, and its weight ratio is 3:2:1.

[0039] The water content of the straw ...

Embodiment 2

[0046] The present embodiment takes Salix salix as the plant fiber raw material, and its pulping method is as follows: figure 1 shown.

[0047] Salix salix is ​​cut with a crusher and thinned at the same time. After cutting, the length of the raw material is 2 to 4 cm. Squeeze dry after washing and dedusting, and the extruded washing water will continue to be used for washing and dedusting of plant fiber raw materials after precipitation treatment, and the sediment of washing water will be used as fertilizer.

[0048] Put the Salix salix material after cutting, washing, dedusting and squeezing into the spiral preprocessor at a flow rate of 1500Kg / h, and spray 3Kg of HZ additive and 400Kg of dilute lye with a concentration of 5% at the same time, the treatment temperature is 20°C, and the treatment time is 60 minutes. HZ composite additive is a compound of fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether and sodium alkylbenzene sulfonate, and its weight ...

Embodiment 3

[0056] In this embodiment, cotton stalks are used as plant fiber raw materials, and the pulping method is as follows: figure 1 shown.

[0057] The cotton stalks are cut by a crusher, and the length of the raw material after cutting is 2 to 4 cm. Squeeze dry after washing and dedusting, and the extruded washing water will continue to be used for washing and dedusting of plant fiber raw materials after precipitation treatment, and the sediment of washing water will be used as fertilizer.

[0058] Put the cotton stalk material after cutting, washing, dedusting and squeezing into the spiral preprocessor at a flow rate of 1500Kg / h, and spray 2Kg of HZ additive and 500Kg of dilute lye with a concentration of 3% at the same time, the treatment temperature is 20°C, and the treatment time is 60 minutes. HZ composite additive is a compound of fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether and sodium alkylbenzene sulfonate, and its weight ratio is 3:5:2.

[005...

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Abstract

The invention discloses an energy-saving, environmental-protection and resourced pulping method of plant fibers, wherein the method comprises the following steps: (1) mechanically cutting a raw material; (2) washing with water and dedusting; (3) pretreating; (4) carrying out steam explosion treatment; (5) carrying out hydrolysis treatment, and extracting xylose; (6) carrying out sulfonation treatment, and extracting sodium lignosulfonate; (7) washing with water to obtain a coarse pulp; (8) carrying out pulp grinding treatment, desanding, screening with a pressure screen, washing with water, and squeezing dry to obtain an unbleached pulp with the water content of 60-65%. Hydrogen peroxide is added into the unbleached pulp to bleach the unbleached pulp, so as to obtain a bleached dissolved pulp. The method has a good softening effect on the plant fiber raw material, can extract xylose and sodium lignosulfonate, achieves zero emissions of wastewater by using a membrane separation technology, and has the prominent advantages of less usage of chemicals, prevention of black liquor generation in a traditional pulping process, high yield and relatively low pulping cost.

Description

technical field [0001] The invention belongs to a pulping method using plant fiber raw materials, in particular to an energy-saving, environment-friendly and resource-based pulping method of plant fiber. Background technique [0002] The main reason for the serious environmental pollution caused by the traditional pulping process is the low utilization rate of papermaking raw materials. In particular, straw is the main raw material for pulping in my country, of which non-cellulose raw materials and added chemical raw materials account for nearly half of the weight of raw materials. waste discharge. [0003] As a promising new technology, steam explosion pulping has been highly valued by countries all over the world. Most of the research on steam explosion pulping at home and abroad is limited to the research on steam explosion pulping equipment and process conditions, lacking complete process conditions, The waste water has not been well treated, there is still pollution, an...

Claims

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Application Information

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IPC IPC(8): D21C3/22D21B1/36D21D1/20
CPCD21B1/021D21B1/023D21B1/36D21C5/00D21C9/163D21D1/20
Inventor 武长安邱全国张克贤武晶晶
Owner 武长安
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