Process for vertically digesting bagasse pulp by anthraquinone sulfate process

An anthraquinone sulfate, bagasse pulp technology, applied in digester, papermaking, textiles and papermaking, etc., can solve the problem of pulp that cannot produce deep delignification, difficulties in black liquor extraction and pulp washing, and continuous cooking system requirements High problems, to achieve the effect of reducing the cooking process time, high hemicellulose content, and preventing uneven liquid

Inactive Publication Date: 2009-11-18
云南双江和泰竹产业发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limitations of the structure of the steaming ball itself, the cooking process is far from the ideal cooking chemical conditions, resulting in low efficiency of the cooking process, high energy consumption, high consumption of chemicals, high production costs, and the inability to produce deeply delignified pulp When the slurry is discharged, the phenomenon of reabsorption of the dissolved organic matter into the fiber cells occurs, and the spraying or transport of the slurry causes the fiber of the slurry to be refined, making it more difficult to extract black liquor and pulp washing
In order to solve these problems, people have made many attempts, such as adopting a continuous cooking process, etc., but failed to achieve the expected results due to many problems and high requirements for the continuous cooking system
There is a precedent for vertical pot cooking in acid method, but cooking in vertical cooking pot will cause poor circulation of liquid medicine, bagasse is difficult to cook good pulp, and it is difficult to spray out the cooked pulp

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0022] 1. Install the liquid distribution plate on the lower part of the outlet of the circulation pipe on the vertical cooking pot (replacing the circulation grate with a diameter of Φ6mm on the original cooking pot), and there are Φ20mm uniformly dispersed holes on the liquid distribution plate. And cancel the lower circulation grate, like this, when the medicinal liquid circulates, the bagasse in the upper circulation position can fully absorb the medicinal liquid, thereby ensuring the cooking quality.

[0023] 2. Cooking process:

[0024] 1) Pack (absolutely dry) bagasse into 75m 3 In the vertical steamer, part of the bottom water is made before loading the pot (the bottom water uses the dilute black liquor after pulp washing), and the pot is filled with liquid immersion (that is, the bagasse raw material is loaded into the cooking pot while feeding the liquid, and then the raw material is loaded). The cooking liquid is sent through the upper circulation pipe, and after t...

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Abstract

The invention discloses a vertical-oven bagasse pulp boiling method through anthraquinone sulfate method, which is characterized by the following: modifying vertical-oven boiler structure; adopting AQ-sulfate and special boiling technology; reducing the boiling time relatively; boiling bagasse pulp at common high temperature to produce high-obtaining pulp; possessing excellent uniformity, high-obtaining, little-energy, high-strength and rapid-wood stripping advantages to produce pulp; providing beneficial condition for ECF or TCF bleaching technology; enlarging the factory scale, industrial structure and source allocation.

Description

technical field [0001] The invention relates to a method for vertical pot cooking of bagasse pulp by using anthraquinone kraft method. Background technique [0002] Bagasse is a by-product of the sugarcane sugar industry, concentrated by sugar factories, and is an ideal raw material for papermaking. Bagasse is a short fiber with low tearing and similar properties to hardwood pulp. For most cardboard varieties, bagasse pulp can almost completely replace hardwood pulp. Bagasse is rich in sources, easy to pulp, easy to bleach, the surface of the paper is smooth and delicate, and the production cost is low. It can be used to make household paper, cultural printing paper, paper tableware, etc. [0003] At present, most of the bagasse in sugar factories are used as fuel for their own boilers to recover heat energy, and the unused bagasse is discarded to the waste dump, which is a pity. [0004] In my country's bagasse pulping enterprises using the kraft method, most of them use ...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): D21C5/00D21C7/00
Inventor葛云昆龚继培赵玉华傅琼华
Owner云南双江和泰竹产业发展有限公司