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Pulping and papermaking process and equipment

A technology for pulping and papermaking and technology, which is applied in the field of new pulping and papermaking technology to achieve the effects of reducing processing steps, shortening processing time, and reducing energy consumption

Inactive Publication Date: 2009-12-30
山东中科润环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the many deficiencies in the existing pulping and papermaking process, the present invention provides a new pulping and papermaking process and its equipment, which adopts the method of continuously passing the pretreated fiber-containing straw plants into the A reaction device with a screw propulsion device, and slurrying agents are added during the movement of raw materials. After adopting this production process, it replaces the original process steps such as fine cutting and cooking of raw materials, and does not need to add strong acids or alkalis. The treatment agent achieves the standard discharge of industrial wastewater, realizes the normal temperature and pressure of the pulping and papermaking reaction, reduces energy consumption, and achieves the purpose of energy saving and emission reduction

Method used

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  • Pulping and papermaking process and equipment

Examples

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Effect test

Embodiment 1

[0042] A kind of pulping and papermaking process, including pretreatment, after cutting the raw material (wheat straw) containing the pulpable fiber into 6cm small sections, directly sending it into the soaking device for soaking, the adopted soaking liquid is clear water, soaking to the dry matter of the raw material The concentration is 25%, and then the pretreated raw material is continuously passed into the reaction device containing four slurry-forming sections, and the slurry-forming agent is added during the movement of the raw material. The four slurry-forming sections include :

[0043] (1) Raw material crushing and compression section; the reaction temperature in this section is 35-45°C, and the compression ratio of raw material is 3:1; The consumption of alkaline treatment liquid is 5.5% of dry matter weight in the mixed raw material;

[0044] After going through this treatment section, the raw material gradually changes from a mixed system of dry matter and pre-so...

Embodiment 2

[0052] A pulping and papermaking process, including pretreatment, after cutting the wheat straw raw material containing pulpable fibers into small sections of 5 cm, it is directly sent to a soaking device for soaking, the soaking liquid used is clear water, and the concentration of the dry matter of the raw material after soaking is 35%, and then the pretreated raw material is continuously passed into the reaction device containing two slurry-forming sections, and slurry-forming agents are added during the movement of the raw material. The two slurry-forming sections include:

[0053] (1) Raw material crushing and compression section; the reaction temperature in this section is 35-45°C, and the compression ratio of raw material is 3.3:1; the treatment agent added in this slurry section is weakly alkaline treatment liquid, sodium silicate, the The consumption of weak alkaline treatment liquid is 3.5% of dry matter weight in the mixed raw material;

[0054] After this treatment ...

Embodiment 3

[0059] A kind of pulping and papermaking process, including pretreatment, after cleaning the wheat straw raw material containing pulpable fiber, cutting it into small sections of 7 cm, and then directly sending it into a soaking device for soaking, and the soaking liquid adopted is an aqueous solution of baking soda; The pretreated raw materials are continuously fed into the reaction device containing two slurry-forming sections, and slurry-forming agents are added during the movement of the raw materials. The two slurry-forming sections include:

[0060] (1) Compression section: the reaction temperature in this section is 85-93°C, and the compression ratio of raw materials is 2.8:1; the treatment agent added in the compression section is an acidic chlorine-containing oxidant, calcium chlorate, the amount of the treatment agent 9-10% of the weight of dry matter in the mixed raw materials;

[0061] After this treatment section, the raw material system is close to pulp, and its ...

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Abstract

The invention relates to pulping and papermaking technology, in particular to a novel pulping and papermaking process at normal temperature and normal pressure, which mainly comprises that a raw material added with a pulping medicament is subjected to at least once compression or expansion process to form pulp, namely the pretreated raw material is continuously introduced into a reaction device which comprises at least one pulping section and is provided with a screw propelling device, and the pulping medicament is added in the raw material moving process. The production process replaces the prior process steps such as raw material fine cutting, cooking and the like, reduces the dosage of strong acid or strong base treatment medicaments, realizes the up to standard emission of industrial wastewater and the pulping and papermaking reaction at normal temperature and normal pressure, reduces energy consumption and achieves the aims of saving energy and reducing emission.

Description

technical field [0001] The invention relates to pulping and papermaking technology, in particular to the pulping and papermaking technology of fiber-containing straw plants, and in particular to a new pulping and papermaking technology under normal temperature and pressure. Background technique [0002] The traditional papermaking straw pulp production process generally adopts alkaline chemical pulping. The treatment of straw pulp black liquor produced by this method is the focus of environmental protection work. The treatment technology of straw pulp black liquor has become a recognized problem in the world. The recognized treatment The best way for wheat straw pulp black liquor is alkali recovery, but due to disadvantages such as poor water filtration performance of wheat straw pulp, high viscosity of black liquor, high silicon content, etc., the alkali recovery technology is extremely difficult. For small or even medium-sized enterprises However, due to the large investme...

Claims

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Application Information

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IPC IPC(8): D21C3/22D21C3/02
Inventor 钟惠丽
Owner 山东中科润环保科技有限公司
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