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Application of small pulping machines in paper industry

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Application of small pulping machines in paper industry

Release date:2018-06-13 Author: Click:

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In 1995, the ministry of civil affairs of the People's Republic of China officially approved the establishment of China paper chemical industry association. According to the preliminary investigation and analysis of the China association of papermaking chemicals, the actual sales volume of papermaking chemicals in China was about 250,000 t at the end of the ninth five-year plan period, which may reach 600,000 t by the end of the tenth five-year plan period. Therefore, China paper chemical industry is a promising sunrise industry.



Small pulping machines for paper industry



1.1 application in pulping



The fiber materials for paper making mainly come from wood pulp, non-wood fiber pulp and recycled fiber pulp. Wood pulp and non-wood fiber pulp can be divided into machine grinding pulp and chemical pulp.



1.1. 1 cooking AIDS



Small pulping machine used for cooking additives, can promote the cooking liquid infiltration of fibrous materials, improve the cooking liquor for wood or wood lignin and the removal of the resin, the effect of dispersion resin, as resin anion removal agent small mechanical pulping are four polypropylene benzene sulfonic acid sodium dodecyl benzene sulfonic acid, sodium, sodium fatty alcohol, dimethyl benzene sulfonic acid, condensation naphthalene sulfonate, alkyl phenol polyoxyethylene ether sodium sulfate and so on; Non-ionic small pulping machinery alkylphenol polyoxyethylene ether, fatty alcohol polyoxyethylene ether, fatty acid polyoxyethylene ester, polyether, etc. With non-ionic small mechanical pulping removal resin, with nonylphenol polyoxyethylene ether is the most effective, the anion of small mechanical pulping and non-ionic small mechanical pulping compound with common effect is better, can promote the lignin and the removal of the resin, and can increase the pulp yield, for example: add mass ratio is 1: (1 ~ 2) dimethyl benzene sulfonic acid and condensation of naphthalene sulfonic acid sodium and nonylphenol polyoxyethylene ether compounds, can receive good resin removal effect.



1.1.2 deinking agent for waste paper



Due to the worldwide tense papermaking raw fiber raw materials and environmental awareness increasing, waste paper as raw materials for the paper making has become an important source of papermaking fibrous materials, many economic developed countries have legislation to support the development of waste paper recycling technology research, and specifies some kind of secondary fiber legal content in the paper. In recent years, the recycling rate of waste paper and the share of waste paper in papermaking raw materials have increased rapidly.



As an important part of papermaking chemicals, small-sized pulping machines are widely used in pulp making, wet parts, small sizing, coating and wastewater treatment.



In recent years, due to the shortage of timber, wastepaper regeneration rate is greatly increased, the strict environmental legislation, these three factors, combined with the development of high and new technology, such as large-scale, quick running of papermaking equipment, paper and cardboard, diversification, high-grade the impact and demand of various novel papermaking chemicals are constantly emerging, to improve the production of paper, improve quality, reduce pollution and improve the economic benefit and so on all play an important role. Therefore, countries all over the world attach great importance to the development and production of papermaking chemicals. The overall development speed of papermaking chemicals has always maintained a growth rate of 3% to 4%. Global sales have reached $8.5 billion. U.S. sales growth rate of 4.8%, annual growth rate as high as 11.32% of the sales in Japan, Western Europe, 3.13% of faster-growing varieties is retention and filtration aid, sizing agent, strengthening agent, antiseptic fungicide, resin/sediment control agent, deinking agent, such as paper with fine chemicals, and these paper almost cannot leave the small fine chemical pulping machine.


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