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Method for preparing unbleached pulp and producing high-strength corrugated paper from cotton stalk
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A production method and technology of corrugated paper, applied in pulp beating method, pulp beating/refining method, papermaking, etc., can solve problems such as pulping pollution, and achieve the effects of reducing pollution, reducing costs, and saving resources
Active Publication Date: 2015-05-27
石河子市国力源环保制浆有限公司
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[0003] The purpose of the present invention is to solve the problem of the existing cotton stalk chemical pulping pollution, and to provide a pollution-free method for making natural color paste with cotton stalks
Method used
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Embodiment 1
[0020] Pulping section:
[0021] (1) Cotton stalks are cut into sections of about 30mm by a pulverizer.
[0022] (2) The qualified cotton stalk raw material is conveyed to the washing machine by metering screw, washed, dehydrated by screw extrusion, and the light and heavy impurities in the raw material are removed.
[0023] (3) The dehydrated raw materials are conveyed to the screw feeder by metering screw, and sent to the continuous steamer, and then add 1kg of biocatalyst, 1kg of trisodium phosphate and 1kg of polyoxyethylene ether per ton of absolute dry cotton stalk, Then, steam was introduced, and the temperature was raised to 120° C. for continuous cooking for 25 minutes.
[0024] (4) After cooking, the material in the continuous steamer is transported to a twin-screw refiner (SLG-300, Hebei Tianzheng Screening Pulping Equipment Co., Ltd.) for 1 min of rubbing and separating to obtain the natural color paste.
[0025] Papermaking section:
[0026] (1) After adjusting...
Embodiment 2
[0029] The difference from Example 1 is that when cooking in step (2), 5 kg of biocatalyst, 3 kg of trisodium phosphate and 1 kg of polyoxyethylene ether are added per ton of dry cotton stalk, and then water vapor is introduced to raise the temperature. Continue cooking at 120°C for 20 minutes.
Embodiment 3
[0031] The difference from Example 1 is that when cooking in step (2), 2 kg of biocatalyst, 2 kg of trisodium phosphate and 2 kg of polyoxyethylene ether are added per ton of dry cotton stalk, and then water vapor is introduced to raise the temperature. Continue cooking at 115°C for 30min.
[0032] Adopt method of the present invention to compare as follows with traditional ammonium chemical method:
[0033] .
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Abstract
The invention discloses a method for preparing unbleached pulp from cotton stalk. The method comprises the following steps of: (1) cooking: treating a cotton stalk raw material by use of a biological catalytic decomposing agent, a surfactant and a penetrant at 115-125 DEG C for 20-30 minutes, wherein based on the absolute dry weight of the cotton stalk raw material, the dosage of the biological catalytic decomposing agent is 0.1-0.5%, the dosage of the surfactant is 0.1-0.3%, and the dosage of the penetrant is 0.1-0.2%; and (2) pulp grinding: feeding the material obtained by the cooking into a pulp grinding machine, and performing pulp grinding to obtain the unbleached pulp. Compared with a traditional chemical pulp making method, the method provided by the invention has the advantages that the water consumption for each ton of paper is greatly reduced, the crude pulp yield can reach 75-80%, and zero sewage discharge is realized. Compared with the corrugated paper copied by the pulp obtained by a traditional ammonium sulfite method, the high-strength corrugated paper copied by the unbleached pulp subjected to high-concentration pulp grinding and low-concentration pulp grinding can improve the ring crush coefficient by 80%.
Description
technical field [0001] The invention belongs to the field of pulping and papermaking, and in particular relates to a method for producing natural color pulp and high-strength corrugated paper with cotton stalks. Background technique [0002] At home and abroad, the current pulping process using cotton stalks mainly includes alkaline pulping and sulfite pulping. The natural color pulp produced has high whiteness, but the black liquor produced by chemical pulping is difficult to deal with, and pulping has always been The largest source of pollution in paper manufacturing enterprises. With the development of the pulp and paper industry, the application potential of biotechnology in the pulp and paper industry has also been recognized by people. Biotechnology treatment has a long operating cycle and is not resistant to high temperatures, and is mainly used in bleaching and wastewater treatment sections, but It is rarely used in the cooking section. Contents of the invention ...
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