阅读说明：本技术 一种木屑纤维的处理工艺 (Treatment process of wood chip fiber ) 是由 李文斌 陈满 韩松 于 2020-12-17 设计创作，主要内容包括：本发明公开了一种木屑纤维的处理工艺。包括以下步骤：(1)酶解；(2)高温处理；(3)疏解净化。本发明的处理工艺先采用纤维素酶和木聚糖酶对木屑纤维进行处理,然后采用碱液进行高温处理,提高木纤维浆的保留率,与废纸浆混合后制得成纸。(The invention discloses a treatment process of wood chip fibers. The method comprises the following steps: (1) carrying out enzymolysis; (2) high-temperature treatment; (3) and (5) defibering and purifying. The treatment process of the invention firstly adopts cellulase and xylanase to treat the wood chip fiber, then adopts alkali liquor to carry out high-temperature treatment, improves the retention rate of wood fiber pulp, and prepares the finished paper after mixing with waste paper pulp.)

1. A treatment process of wood chip fiber is characterized by comprising the following steps:

(1) enzymolysis: placing the wood chip fiber in water, adding cellulase and xylanase, and reacting at 40-50 deg.C for 50-60min to obtain enzymatic hydrolysate;

(2) high-temperature treatment: adding sodium hydroxide into the enzymolysis solution, and treating at 90-110 deg.C for 50-60min to obtain wood fiber pulp 1;

(3) defibering and purifying: and (3) sending the wood fiber pulp 1 obtained in the step (2) into a fluffer for fluffing to obtain the final wood fiber pulp 2.

2. The wood chip fiber treatment process according to claim 1, wherein in the step (2), hydrogen peroxide is added after the wood fiber pulp 1 is obtained, the reaction is carried out for 70-90min at the temperature of 70-80 ℃, washing is carried out after the reaction is finished, and the next step is carried out after the washing and the concentration.

3. The wood chip fiber processing technology according to claim 2, wherein the hydrogen peroxide is added in an amount of 10-15% by weight based on 1% by weight of the wood fiber pulp.

4. A process as claimed in claim 2 or 3, wherein the hydrogen peroxide is added together with sodium silicate, polyacrylamide and maltodextrin.

5. The wood chip fiber processing technology of claim 4, wherein the sodium silicate, the polyacrylamide and the maltodextrin are added in an amount of 1-3%, 5-8% and 2-5% by weight of the wood fiber pulp, respectively.

6. The wood chip fiber processing process according to claim 1, wherein the weight ratio of the wood chips to the water in the step (1) is as follows: 1: 8-10; the cellulase and xylanase are added at 0.01% and 0.02% by weight of the wood chips.

7. The wood chip fiber processing technology of claim 1, wherein the sodium hydroxide added in the step (2) is 15-20% of the weight of the enzymolysis solution.

Technical Field

The invention relates to a treatment process of wood chip fibers, and belongs to the technical field of papermaking.

Background

Paper making companies are seeking new materials to replace waste paper materials. Sawdust fiber, also called wood fiber raw material, has a great price advantage and belongs to the category of leftover waste, and thus, the sawdust fiber is paid attention to paper making research and development personnel. At present, the use research of the wood chip fiber is less, the wood chip fiber is only limited to direct application of the wood chip fiber, and the use effect is poor.

Because the wood chip fiber is bulky, small in chip, short in fiber and easy to generate spray, the wood chip fiber needs to be pretreated to be applied to the papermaking industry.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides a treatment process of wood chip fiber.

The invention is realized by the following technical scheme:

a treatment process of wood chip fiber comprises the following steps:

(1) enzymolysis: placing the wood chip fiber in water, adding cellulase and xylanase, and reacting at 40-50 deg.C for 50-60min to obtain enzymatic hydrolysate;

(2) high-temperature treatment: adding sodium hydroxide into the enzymolysis solution, and cooking for 50-60min at 90-110 deg.C to obtain wood fiber pulp 1;

(3) defibering and purifying: and (3) sending the wood pulp obtained in the step (2) into a fluffer for fluffing to obtain the final wood fiber pulp 2.

In the wood chip fiber treatment process, in the step (2), after the wood fiber pulp 1 is obtained, hydrogen peroxide is added, the reaction is carried out for 70-90min at the temperature of 70-80 ℃, washing is carried out after the reaction is finished, concentration is carried out after the washing, and then the next step is carried out.

According to the wood chip fiber treatment process, the addition amount of the hydrogen peroxide is 10-15% of 1 weight of the wood fiber pulp.

According to the treatment process of the wood chip fiber, sodium silicate, polyacrylamide and maltodextrin are added when hydrogen peroxide is added.

According to the treatment process of the wood chip fiber, the adding amount of the sodium silicate, the polyacrylamide and the maltodextrin is 1-3%, 5-8% and 2-5% of the weight of the wood fiber pulp respectively.

The wood chip fiber treatment process comprises the following steps of (1) mixing wood chips and water in a weight ratio: 1: 8-10; the cellulase and xylanase are added at 0.01% and 0.02% by weight of the wood chips.

In the wood chip fiber treatment process, the sodium hydroxide added in the step (2) accounts for 15-20% of the weight of the enzymolysis solution.

The invention achieves the following beneficial effects:

the treatment process of the invention firstly adopts cellulase and xylanase to treat the wood chip fiber, then adopts alkali liquor to carry out high-temperature treatment, improves the retention rate of wood fiber pulp, and prepares the finished paper after mixing with waste paper pulp.

The invention also adopts hydrogen peroxide to treat the wood fiber pulp, and simultaneously adds sodium silicate, polyacrylamide and maltodextrin, so that the content of organic chlorine in the produced waste water is reduced by 32.46 percent, the whiteness of the wood fiber pulp is improved by 2.2 percent ISO, and the viscosity is 690 mL-g^-1The above.

Drawings

FIG. 1 is a process flow diagram of the present invention.

Detailed Description

The invention is further described below. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

Example 1

A treatment process of wood chip fiber comprises the following steps:

(1) enzymolysis: placing the wood chip fiber in water, adding cellulase and xylanase, and reacting at 40-50 deg.C for 50-60min to obtain enzymatic hydrolysate;

(2) high-temperature treatment: adding sodium hydroxide into the enzymolysis solution, and treating at 90-110 deg.C for 50-60min to obtain wood fiber pulp; adding hydrogen peroxide, sodium silicate, polyacrylamide and maltodextrin, reacting for 70-90min at 70-80 ℃, washing after the reaction is finished, and concentrating after the washing to obtain concentrated wood fiber pulp; wherein the addition amount of the hydrogen peroxide is 10 percent of the weight of the wood fiber pulp; the adding amount of the sodium silicate, the polyacrylamide and the maltodextrin is respectively 1 percent, 5 percent and 5 percent of the weight of the wood fiber pulp;

(3) defibering and purifying: and (3) sending the wood fiber pulp obtained in the step (2) into a fluffer for fluffing to obtain the final wood fiber pulp.

The weight ratio of the wood chips to the water in the step (1) is as follows: 1: 8; the cellulase and xylanase are added at 0.01% and 0.02% by weight of the wood chips. And (3) adding sodium hydroxide in the step (2) to account for 20% of the weight of the enzymolysis solution.

And finally, mixing the obtained wood fiber pulp with waste paper pulp in a pulp forming pool, and then carrying out paper making and forming together to obtain finished paper.

Example 2

A treatment process of wood chip fiber comprises the following steps:

(1) enzymolysis: placing the wood chip fiber in water, adding cellulase and xylanase, and reacting at 40-50 deg.C for 50-60min to obtain enzymatic hydrolysate;

(2) high-temperature treatment: adding sodium hydroxide into the enzymolysis solution, and treating at 90-110 deg.C for 50-60min to obtain wood fiber pulp; adding hydrogen peroxide, sodium silicate, polyacrylamide and maltodextrin, reacting for 70-90min at 70-80 ℃, washing after the reaction is finished, and concentrating after the washing to obtain concentrated wood fiber pulp; wherein the addition amount of the hydrogen peroxide is 15 percent of the weight of the wood fiber pulp; the adding amount of the sodium silicate, the polyacrylamide and the maltodextrin is respectively 3 percent, 8 percent and 2 percent of the weight of the wood fiber pulp;

(3) defibering and purifying: and (3) sending the wood fiber pulp obtained in the step (2) into a fluffer for fluffing to obtain the final wood fiber pulp.

The weight ratio of the wood chips to the water in the step (1) is as follows: 1: 10; the cellulase and xylanase are added at 0.01% and 0.02% by weight of the wood chips. The weight of the sodium hydroxide added in the step (2) is 15% of that of the enzymolysis solution.

And finally, mixing the obtained wood fiber pulp with waste paper pulp in a pulp forming pool, and then carrying out paper making and forming together to obtain finished paper.

Example 3

A treatment process of wood chip fiber comprises the following steps:

(1) enzymolysis: placing the wood chip fiber in water, adding cellulase and xylanase, and reacting at 40-50 deg.C for 50-60min to obtain enzymatic hydrolysate;

(2) high-temperature treatment: adding sodium hydroxide into the enzymolysis solution, and treating at 90-110 deg.C for 50-60min to obtain wood fiber pulp; adding hydrogen peroxide, sodium silicate, polyacrylamide and maltodextrin, reacting for 70-90min at 70-80 ℃, washing after the reaction is finished, and concentrating after the washing to obtain concentrated wood fiber pulp; wherein the addition amount of the hydrogen peroxide is 12 percent of the weight of the wood fiber pulp; the adding amount of the sodium silicate, the polyacrylamide and the maltodextrin is respectively 2 percent, 6 percent and 4 percent of the weight of the wood fiber pulp;

(3) defibering and purifying: and (3) sending the wood fiber pulp obtained in the step (2) into a fluffer for fluffing to obtain the final wood fiber pulp.

The weight ratio of the wood chips to the water in the step (1) is as follows: 1: 9; the cellulase and xylanase are added at 0.01% and 0.02% by weight of the wood chips. The weight of the sodium hydroxide added in the step (2) is 18% of that of the enzymolysis solution.

And finally, mixing the obtained wood fiber pulp with waste paper pulp in a pulp forming pool, and then carrying out paper making and forming together to obtain finished paper. The quality index of the finished paper reaches the index requirement of B series in the enterprise standard Q/320581GEV001-2019 cardboard paper, and the tightness is more than or equal to 0.70g/cm³The burst index is more than or equal to 1.80 kPa.m²G, ring pressure index is more than or equal to 4.00 N.m/g, and water absorption (normal/reverse) is less than or equal to 60/80g/m²The smoothness is more than or equal to 7.0s, and the delivery moisture is 8.0 +/-2.0%. The usage amount of the waste paper is reduced by 5 percent, the unit consumption of the waste paper is reduced to be less than 1.10, the cost of the comprehensive chemicals is increased, the cost per ton of paper is reduced by about 15-20 yuan, and the annual cost is reduced by about 450 ten thousand yuan.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.