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A prepreg for papermaking and a clean low-carbon papermaking pulping process

A prepreg and process technology, which is applied in the field of paper pulping, can solve the problems of polluted air and serious pollution, and achieve the effects of reduced investment, simplified process flow, and less fiber damage

Active Publication Date: 2015-09-16
张帆
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Fourth, the pollution is serious, and the chemicals used in pulping are mainly NaOH, NaOH 2 S, Cl 2 , ClO 2 etc., producing a large amount of waste water such as black liquor and red liquor and seriously polluting the air

Method used

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  • A prepreg for papermaking and a clean low-carbon papermaking pulping process
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  • A prepreg for papermaking and a clean low-carbon papermaking pulping process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] The prepreg is composed of the following components in mass percentage:

[0061]

[0062] Feasible specific formulations are:

[0063] Formula 1: 27% formic acid, 30% acetic acid, 12% concentrated sulfuric acid, 30% hydrogen peroxide, 1% 4A molecular sieve.

[0064] Formula 2: 26.5% formic acid, 29.5% acetic acid, 9.5% sulfuric acid, 33.5% hydrogen peroxide, 1% 4A molecular sieve.

[0065] Prepreg preparation process:

[0066] First: put 4A molecular sieve into hydrogen peroxide and fully dissolve;

[0067] Next: Slowly drip sulfuric acid into hydrogen peroxide to obtain peroxymonosulfuric acid (abbreviated as Px in the present invention) while adopting cold bath method;

[0068] Then: slowly pour acetic acid into peroxymonosulfuric acid to obtain peroxy mixed acid (abbreviated as Pax in the present invention);

[0069]Finally: Slowly pour formic acid into the peroxygen mixed acid to obtain the peroxygen complex acid, i.e. the prepreg (abbreviated as Pjax in the ...

Embodiment 2

[0071] Taking bamboo waste as raw material, the pulping process flow of the present invention is shown in figure 1 .

[0072] Pulping formula (the following percentages are mass percentages):

[0073] Pre-dipping agent: the formula 1 or formula 2 of the pre-dipping agent described in embodiment 1.

[0074] Activator: oxalic acid

[0075] Neutralizer: Sodium Carbonate

[0076] Waste residue treatment: refer to national patent ZL2012 1 0331478.3

[0077] National patent ZL2012 1 0106232.6

[0078] The specific steps are:

[0079] Crushing: Use a Bx326 drum re-crusher to crush the bamboo waste into 15-30 mm long crushed materials.

[0080] Dust removal: Use ZCC-2 dust collector to remove non-fibrous silt dust in the crushed material to obtain clean material.

[0081] Prepreg: according to the ratio of material to liquid 1:3.6; put 3.5 tons of clean material, 12.6 tons of prepreg, and 63 kg of oxalic acid into ZJQ1 steaming ball (volume 14m 3 )middle. Rotate the steaming ...

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Abstract

The invention belongs to the technical field of papermaking, and discloses a pre-impregnation agent for papermaking and a clean and low-carbon papermaking and pulping process. The pre-impregnation agent consists of formic acid, acetic acid, concentrated sulfuric acid, hydrogen peroxide and a 4A molecular sieve in a certain ratio. The pulping process comprises the steps of smashing, dedusting, pre-impregnating, grinding, shoving, washing pulp, carrying out deslagging and size mixing, and the like. In the pre-impregnation agent for papermaking, the conventional pulping chemicals such as NaOH, Na2S, Cl2 and ClO2 are used. Meanwhile, a boiler is not used, chemical digestion is eliminated, and pulping is performed under the normal temperature condition, so that the aim of pulping in a 'low-carbon, clean and environment-friendly' manner is fulfilled.

Description

technical field [0001] The invention belongs to the technical field of papermaking pulping, and in particular relates to a papermaking prepreg and a chemical mechanical pulping process under normal temperature conditions. Background technique [0002] The current pulping process mostly adopts chemical cooking and chlorine bleaching technology, which has the following defects: [0003] One, the raw material utilization rate is low, and the pulp yield of chemical pulp is less than 50%, wasting a large amount of fibrous raw materials. [0004] Second, high energy consumption requires high-temperature cooking treatment. One ton of pulp produced domestically consumes 0.68 tons of coal. [0005] Third, the water consumption is large. Taking 2010 as an example, the total output of the national paper industry was 92.7 million tons, and the water consumption was 12.339 billion m 3 , that is, the water consumption per ton of paper produced is 133.1m 3 . [0006] Fourth, the pollut...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21C3/04
Inventor 张帆于翔
Owner 张帆
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