Process for producing papermaking pulp by taking corn straws as raw materials

A technology of corn stalks and technology, applied in the field of technology, can solve the problems of insufficient plant fiber raw material resources, unreasonable application of fiber characteristic structure, dependence on imports of pulp for papermaking, etc., to solve the problem of resource utilization, realize resource utilization, The effect of considerable economic and social benefits

Inactive Publication Date: 2020-09-18
吴学军 +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At the same time, there is a shortage of raw materials in my country's papermaking industry, which has become a strategic issue affecting the development of the papermaking industry; it is known that cellulose fiber is the main raw material for papermaking, and crop straw is rich in cellulose fiber. Plant fiber raw materials represented by crop straws are not sufficient enough, making paper pulp rely on imports, and corn straw has a certain specificity in structure and components compared with other crop straws, and the existing conventional chemical methods are difficult to use corn straw to achieve Papermaking, leading to unreasonable application of fiber characteristics and structure of plant fiber raw material resources in my country

Method used

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  • Process for producing papermaking pulp by taking corn straws as raw materials
  • Process for producing papermaking pulp by taking corn straws as raw materials
  • Process for producing papermaking pulp by taking corn straws as raw materials

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Embodiment 1

[0030] This embodiment discloses a process for producing pulp for papermaking using corn stalks as a raw material, comprising the following steps:

[0031] Ⅰ. Send the processed corn stalks into the low-temperature cooker through the auger, add water according to the solid-to-liquid ratio of 1:15, and cook at 60°C for 180 minutes to complete the low-temperature cooking; The length of corn stalk silk is 10-80mm, the width is 0.5-8mm, no dust, and the qualified rate is more than 70%;

[0032] Ⅱ. Wash the material after low-temperature cooking, so that the content of dissolved substances in the material is lower than 0.2%;

[0033] Ⅲ. Send the washed material directly into the screw extrusion separator to separate part of the water in the material, and finally, control the solid-liquid ratio of the material at about 1:3;

[0034] Ⅳ. The material obtained by Ⅲ is sent into the high-pressure cooker through the feeder, and the temperature of the material in the high-pressure cooker...

Embodiment 2

[0049] This embodiment discloses a process for producing pulp for papermaking using corn stalks as a raw material, comprising the following steps:

[0050] Ⅰ. Send the processed corn stalks into the low-temperature cooker through the auger, add water according to the solid-to-liquid ratio of 1: 12, and cook at 80°C for 120 minutes to complete the low-temperature cooking; The length of corn stalk silk is 10-80mm, the width is 0.5-8mm, no dust, and the qualified rate is more than 70%;

[0051] Ⅱ. Wash the material after low-temperature cooking, so that the content of dissolved substances in the material is lower than 0.2%;

[0052] Ⅲ. Send the washed material directly into the screw extrusion separator to separate part of the water in the material, and finally, control the solid-liquid ratio of the material at about 1:3;

[0053] Ⅳ. The material obtained by Ⅲ is sent into the high-pressure cooker through the feeder, and the temperature of the material in the high-pressure cooker ...

Embodiment 3

[0069] This embodiment discloses a process for producing pulp for papermaking using corn stalks as a raw material, comprising the following steps:

[0070] Ⅰ. Send the processed corn stalks into the low-temperature cooker through the auger, add water according to the solid-to-liquid ratio of 1:20, and cook at a temperature of 70°C for 170 minutes to complete the low-temperature cooking; The length of corn stalk silk is 10-80mm, the width is 0.5-8mm, no dust, and the qualified rate is more than 70%;

[0071] Ⅱ. Wash the material after low-temperature cooking, so that the content of dissolved substances in the material is lower than 0.2%;

[0072] Ⅲ. Send the washed material directly into the screw extrusion separator to separate part of the water in the material, and finally, control the solid-liquid ratio of the material at about 1:3;

[0073] Ⅳ. The material obtained by Ⅲ is sent into the high-pressure cooker through the feeder, and the temperature of the material in the hig...

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Abstract

The invention discloses a process for producing papermaking pulp by taking corn stalks as raw materials. The process comprises the following steps: I, cooking treated corn stalks at a low temperature;II, washing the material subjected to low-temperature cooking; III, separating out residual washing liquid in the materials; IV, cooking the materials at a high temperature; V, mixing the material subjected to high-temperature cooking with low-temperature water to reduce the temperature of the material to 90-95 DEG C; VI, screening and washing, wherein the oversize part is coarse pulp for papermaking; and VII, changing the coarse pulp into fine pulp by a conventional pulping process, and further using the fine pulp for papermaking. The corn straws are used as a raw material to produce the papermaking pulp, the problem of resource utilization of corn straws is solved, the problem of large gaps of papermaking raw materials in China is solved, and considerable economic benefits and social benefits are generated.

Description

technical field [0001] The invention relates to a process, in particular to a process for producing pulp for papermaking with corn stalks as raw materials. Background technique [0002] In my country, corn is widely planted, especially in Heilongjiang Province, Jilin Province, Inner Mongolia Autonomous Region and Liaoning Province, due to factors such as soil and climatic conditions are very suitable for the growth of corn crops, the total output of corn can reach hundreds of millions of tons, and the amount of corn stalks According to 80% of corn production, a large amount of corn stalks will be produced in my country every year; while planting corn brings good economic benefits, it also brings about a major problem that corn stalks are difficult to digest. [0003] At the same time, there is a shortage of raw materials in my country's papermaking industry, which has become a strategic issue affecting the development of the papermaking industry; it is known that cellulose fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H11/12D21C5/00D21D1/20D21D5/02
CPCD21C5/00D21D1/20D21D5/02D21H11/12
Inventor 吴学军岳金权李新良李满风庞树军
Owner 吴学军
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