Unbleach pulp and preparation technology and application thereof

A preparation process, a technology for uncolored pulp, applied in multi-stage pulping process, pulp beating/refining method, textiles and papermaking, etc. The pulping effect is remarkable, the heating cost is saved, and the pulp yield is high.

Inactive Publication Date: 2018-09-28
北京华浩荣创科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] On the other hand, the annual output of crop straw and waste wood in my country is as high as 100 million tons, but the comprehensive utilization rate is less than 40%.
[0015] However, it is worth noting that in the production process of pulping with additives, the additives are complex, not only costly, but also cannot be applied to food packaging or tableware and other materials, which will significantly affect the quality of pulping. And the cost of slurry treatment in the later stage is higher

Method used

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  • Unbleach pulp and preparation technology and application thereof
  • Unbleach pulp and preparation technology and application thereof
  • Unbleach pulp and preparation technology and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] Example 1 A natural color paste and its pulping process

[0082] A kind of natural color paste, made of wheat straw, the production scale is 10,000 tons of slurry per year, the beating degree of the obtained natural color paste is 55-70 ° SR beating, the preparation process is as follows:

[0083] (1) Raw material crushing: the wheat straw is preliminarily crushed at a rate of 3 t / h, and the length after the primary crushing is 2 cm.

[0084] (2) Iron removal treatment: the pulverized raw material in step (1) is subjected to iron removal treatment;

[0085] The iron removal treatment is two-stage. The crushed raw materials are firstly subjected to one-stage iron removal to remove iron-containing impurities close to the surface of the belt in the raw materials, and then undergo a second-stage iron removal to remove iron-containing impurities inside the raw materials; iron removal treatment steps and raw materials The raw material processing rate ratio for the pulverizat...

Embodiment 2

[0093] Example 2 A natural color paste and its pulping process

[0094] A kind of natural color paste, made of straw, the production scale is 10,000 tons of slurry per year, the beating degree of the obtained natural color paste is 55-70 ° SR beating, the preparation process is as follows:

[0095] (1) Raw material crushing: Preliminarily crush the rice straw at a crushing rate of 2t / h, and the length of the primary crushed rice straw is 1cm.

[0096] (2) Iron removal treatment: the pulverized raw material in step (1) is subjected to iron removal treatment;

[0097] The iron removal treatment is two-stage. The crushed raw materials are firstly subjected to one-stage iron removal to remove iron-containing impurities close to the surface of the belt in the raw materials, and then undergo a second-stage iron removal to remove iron-containing impurities inside the raw materials; iron removal treatment steps and raw materials The raw material processing rate ratio for the crushing...

Embodiment 3

[0105] Example 3 A natural color paste and its pulping process

[0106] A kind of natural color paste, made of waste wood chips, with a production scale of 10,000 tons of slurry per year, the beating degree of the obtained natural color paste is 60 ° SR beating, and the preparation process is as follows:

[0107] (1) Raw material crushing: Preliminary crushing of waste wood chips, the crushing rate is 4t / h, and the length after primary crushing is 3cm.

[0108] (2) Iron removal treatment: the pulverized raw material in step (1) is subjected to iron removal treatment;

[0109] The iron removal treatment is two-stage. The crushed raw materials are firstly subjected to one-stage iron removal to remove iron-containing impurities close to the surface of the belt in the raw materials, and then undergo a second-stage iron removal to remove iron-containing impurities inside the raw materials; iron removal treatment steps and raw materials The raw material processing rate ratio for th...

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Abstract

The invention provides unbleach pulp and a preparation technology and an application thereof, and relates to the field of straw pulping technologies. Raw materials of the unbleach pulp are extensivelyselected, and wheat grass, straw, reed straw and waste wood chips can be efficiently used as the pulping raw materials, so the pulping cost is remarkably reduced. The preparation technology for the unbleach pulp is capable of using a new technology to replace steam heating in an aspect of softening the raw materials, remarkably saving the heating cost, and solving a pulp black liquor problem existing in a pulping process. A production technology flow of the unbleach pulp is simplified, electricity and water are saved efficiently, a resource utilization rate is effectively improved, and wastewater and waste material are not generated in the production process. The special production technology is used for pulping, a beating degree is higher, the quality is better, and a pulping product isstable in performance. The unbleach pulp can be extensively applied to a functional degradable material. In the application fields of corrugated paper preparation, industrial packaging material preparation, sheet material preparation and tableware preparation, the functional applicability of the unbleach pulp and the material quality are remarkably reinforced.

Description

technical field [0001] The invention relates to the technical field of straw pulping, in particular to a natural color pulp and its preparation process and application. technical background [0002] Natural color pulp is due to the requirements of paper varieties, especially some cardboard and industrial technical papers do not need high whiteness, so as long as the pulp obtained by cooking is washed clean, the pulp that maintains its own color is natural color pulp. [0003] Natural pulp is mainly divided into natural straw pulp, natural bamboo pulp and natural wood pulp. Among them, natural color straw pulp mainly uses various annual crop straws, such as corn straw, wheat straw, etc., as the main raw materials, which are convenient, environmentally friendly, low-carbon, and have a short raw material cycle. Natural bamboo pulp mainly uses bamboo as the main raw material, but affected by the growth period and transportation conditions, bamboo pulp cannot be produced on a la...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C3/26D21D1/20D21B1/06
CPCD21C3/26D21B1/06D21D1/20
Inventor 谢彪
Owner 北京华浩荣创科技有限公司
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