Steaming process for modifying bleaching bamboo paper pulp and bleaching wood paper pulp into dissolving pulp in compound way

A composite modification and bamboo pulp technology, applied in the field of dissolving pulp, can solve the problems of low individuality, high production cost, difficulty in dissolving, etc., and achieve the effects of less labor usage, low manufacturing cost, and avoiding overcooking.

CN102677505AActive Publication Date: 2012-09-19YIBIN GRACE GROUP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2012-09-19
Patent Text Reader

Abstract

The invention discloses a steaming process for modifying bleaching bamboo paper pulp and bleaching wood paper pulp into dissolving pulp in a compound way. Compound paper pulp is steamed in a continuous steamer, wherein a continuous steaming pipe of the continuous steamer has three sections, one section connected with a pre-reaction storage bin is provided with steam pipes and a T-shaped pipe, and the other two sections are provided with steam pipes, and steam is introduced into the continuous steamer through the steam pipes; and alkali liquor is added into the continuous steaming pipe through the T-shaped pipe, and the alkali liquor is NaOH and is added in an amount which is 17 to 23 percent of absolute dry weight. According to the steaming process, the bleaching bamboo paper pulp and the bleaching wood paper pulp are used as raw materials, so that the cost for preparing the dissolving pulp is greatly reduced, and requirements on quality of the dissolving pulp for viscose fiber are met.
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Description

technical field

[0001] The present invention relates to a method for compound modification of bleached bamboo pulp and bleached wood pulp into dissolving pulp, in particular to a method for compound modification of bleached bamboo pulp and bleached wood pulp into dissolving pulp, wherein the dissolving pulp refers to pulp for viscose fiber Meal, cellulose and cellulose derivatives. Background technique

[0002] The application number is 200710050470.9, the authorized announcement number is CN101158125, and the authorized announcement date is April 9, 2008. The Chinese invention patent discloses a paper-making grade coniferous wood pulp board modification process, wherein the cooking process uses paper-making grade wood pulp board Use caustic soda method, sulfate method or sulfite method for cooking, and the cooking agents are NaOH, NaOH+Na 2 S, Na 2 SO 3 + NaOH, the process conditions are: 1. The total alkali concentration of the cooking liquid by the caustic soda method...

Examples

Embodiment 1

[0037] A. Preparation:

[0038] The composite pulp board in which the bleached bamboo pulp accounts for 40% of the mixed pulp board is dispersed with a dispersing device such as a bulking machine, a meal feeder, and a leaf splitter, etc., and the cutting equipment and crushing equipment such as a pulper and a pulverizer are used Crush the pulp sheet into flocculent form, and send the flocculent composite pulp sheet into the cooking equipment with conveying equipment (fan, cyclone separator, screw conveyor). Liquid (NaOH), this material preparation method is called dry material preparation in the field, and the material preparation method of this embodiment adopts this material preparation method.

[0039] The concrete processing condition of the dry method that present embodiment adopts is as follows:

[0040] 1. Use the above-mentioned dispersing device to disperse the cotton pulp board into small pieces of 8~10mm;

[0041] 2. Use the above cutting equipment and crushing eq...

Embodiment 2

[0076] A. Preparation:

[0077] The composite pulp board in which the bleached bamboo pulp accounts for 40% of the mixed pulp board is dispersed with a dispersing device such as a bulking machine, a meal feeder, and a leaf splitter, etc., and the cutting equipment and crushing equipment such as a pulper and a pulverizer are used Crush the pulp sheet into flocculation, and send the flocculent composite pulp sheet into the cooking equipment with conveying equipment (fan, cyclone separator, screw conveyor). Immerse in NaOH solution. This method of stock preparation is known in the art as wet stock preparation. This embodiment adopts this material preparation method for material preparation.

[0078] The specific process requirements for preparing materials in this embodiment are as follows:

[0079] 1. Use the above-mentioned dispersing device to disperse the cotton pulp board into small pieces of 8~10mm;

[0080] 2. Use the above cutting equipment and crushing equipment to c...

Embodiment 3

[0094] A. Preparation:

[0095] The composite pulp board in which the bleached bamboo pulp accounts for 40% of the mixed pulp board is dispersed with a dispersing device such as a bulking machine, a meal feeder, and a leaf splitter, etc., and the cutting equipment and crushing equipment such as a pulper and a pulverizer are used Crush the pulp sheet into flocculent form, and send the flocculent composite pulp sheet into the cooking equipment with conveying equipment (fan, cyclone separator, screw conveyor). Liquid (NaOH), this material preparation method is called dry material preparation in the field, and the material preparation method of this embodiment adopts this material preparation method.

[0096] The concrete process of the dry method that present embodiment adopts to prepare material is identical with embodiment 1.

[0097] B. Cooking:

[0098] Send the flocculent composite pulp sheet made in step A to the continuous digester with a screw conveyor or a belt conveyo...