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Pulping auxiliary added in normal-pressure low-temperature clean pulping process

A pulping aid and clean pulping technology, applied in the field of papermaking and pulping, can solve the problems of shortage of fiber raw materials, high energy consumption, environmental pollution, etc., and achieve the effects of reducing emissions, improving utilization rate, and efficient pulping

Active Publication Date: 2013-02-13
TIANJIN RONGYEDA TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The shortage of fiber raw materials, high energy consumption and serious environmental pollution are the three major problems faced by my country's paper industry, and will restrict the benign and healthy development of the paper industry to a certain extent for a long time in the future

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0020] The present invention will be described in further detail below in conjunction with specific examples, and the specific examples described here are only used to explain the present invention, and are not intended to limit the present invention.

[0021] Example: Taking a high-efficiency energy-saving reactor as an example, prepare 2.5 tons of wheat straw, a clean pulping process at atmospheric pressure and low temperature, including five steps of cutting grass and removing dust, entering the reactor, screening and refining, bleaching and extruding the finished pulp ,first step

[0022] First, cut grass and remove dust, add it to the reaction kettle, and add pulping aids for the first time. The added amount is 200kg of sodium hydroxide with a purity of 100%, 2kg of green oxygen with a solid content of 96%, and a Baume degree of 37.5° 300kg of Bé's sodium silicate, 300kg of 27.5% hydrogen peroxide and 4kg of DTPA.

[0023] Next, within 30-40 minutes, the reactor decompos...

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Abstract

The invention discloses a pulping auxiliary added in a normal-pressure low-temperature clean pulping process. The puling process comprises five steps including cutting straws and removing dust, placing in a reaction kettle, screening and grinding into pulp, bleaching and squeezing out the finished pulp. The pulping auxiliary is characterized by comprising sodium hydroxide, green oxygen, sodium silicate, hydrogen peroxide, DTPA (diethylene triamine pentaacetic acid) and low concentration acid. By means of the technical characteristics during the pulping process, the mechanical device such as the reaction kettle is organically combined with the pulping auxiliary to pulp quickly and effectively during the pulping process in a low-temperature and normal-pressure work environment. The pulping auxiliary is environment-friendly in process, green and clean, improves the utilization ratio of the raw materials, and reduces emission load of pollutants.

Description

[0001] technical field [0002] The invention relates to the technical field of papermaking and pulping, in particular to a pulping auxiliary agent added in the normal-pressure low-temperature clean pulping process. Background technique [0003] The shortage of fiber raw materials, high energy consumption and serious environmental pollution are the three major problems faced by my country's paper industry, and will restrict the benign and healthy development of the paper industry to a certain extent for a long time in the future. In the past 20 years, the total annual output of paper and pulp in my country has increased from 5.4 million tons in 1985 to 79.8 million tons in 2008. The total production ranks second in the world, but the annual per capita consumption of paper and paperboard is only a tenth of that of developed countries. one. With the rapid development of my country's society and national economy, the demand for paper will continue to grow rapidly, and there is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C3/22
Inventor 路付保王从容
Owner TIANJIN RONGYEDA TECH DEV
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