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Juncao chemi-machanical pulp as well as preparation method and application thereof

A chemical-mechanical pulping and juncao technology, applied in pulp dewatering, textile and papermaking, washing/replacement of pulp treatment liquid, etc., can solve ecological pressure, low yield of herbal raw material pulping, environmental pollution, large amount of black liquor, etc. problem, to achieve the effect of strong fiber strength, high pulping yield and high cellulose content

Active Publication Date: 2021-10-08
ZHONGFU STRAIT (PINGTAN) DEV CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] In view of the above-mentioned technical problems in the background technology, it is necessary to provide a Juncao mechanical pulp and its preparation method and application, which can overcome the ecological pressure caused by the massive deforestation of woody raw materials and herbaceous raw materials. The shortcomings of low pulping yield and large amount of black liquor production, serious environmental pollution

Method used

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  • Juncao chemi-machanical pulp as well as preparation method and application thereof
  • Juncao chemi-machanical pulp as well as preparation method and application thereof
  • Juncao chemi-machanical pulp as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Example 1 Oasis No. 1 Juncao chemical pulp and its preparation method

[0062] see figure 1 As shown in the chemical mechanical pulping process flow chart, Oasis No. 1 Juncao is cut into 3-5cm broken grass pieces, and then the broken grass pieces are washed and dehydrated, and then pre-steamed at 105°C for 15 minutes to obtain softened Oasis No. 1 Juncao Grass tablets, and then use a twin-screw extruder (TSPI) to carry out the first stage of extrusion, and the material after the first stage of extrusion is chemically impregnated in the first stage with sodium hydroxide, and the first stage The amount of sodium hydroxide for chemical impregnation is 3%, that is, 30kg / BDT (BDT is 30kg of sodium hydroxide per ton of absolute dry pulp), and the concentration of the first stage of chemical impregnation is 30% (chemical system reaction The concentration of the aqueous solution of the material), the temperature of the first stage of chemical impregnation is >90°C, and the imp...

Embodiment 2

[0063] Example 2 Oasis No. 1 Juncao chemical pulp and its preparation method

[0064] The difference from Example 1 is that the first section of chemical impregnation time is 50min, and the sodium hydroxide consumption of the second section of chemical impregnation is 4%, that is, 40kg / BDT (BDT is every ton of absolute dry pulp, that is, every Use 40kg of sodium hydroxide per ton of absolute dry pulp), the temperature of the second stage of chemical impregnation is >90°C, and the impregnation time is 60min to obtain the second material to be ground. The rest of the operation steps were the same as in Example 1, and the Oasis No. 1 Juncao chemical pulp of Example 2 was obtained.

Embodiment 3

[0065] Example 3 Oasis No. 1 Juncao chemical pulp and its preparation method

[0066] The difference from Example 1 is that the first section of chemical impregnation time is 50min, and the sodium hydroxide consumption of the second section of chemical impregnation is 5%, that is, 50kg / BDT (BDT is every ton of absolute dry pulp, that is, every Use 50kg of sodium hydroxide per ton of absolute dry pulp), the temperature of the second stage of chemical impregnation is >90°C, and the impregnation time is 60min to obtain the second material to be ground. The rest of the operation steps were the same as in Example 1, and the Oasis No. 1 Juncao mechanical pulp of Example 3 was obtained.

[0067] In the present invention, for the materials under different impregnation conditions in Examples 1-3, four different Canadian freeness pulp samples are respectively ground by inputting different refining power consumption. Different Canadian freeness pulp samples are prepared according to the...

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Abstract

The invention belongs to the technical field of pulping and papermaking, and particularly relates to Juncao chemi-mechanical pulp as well as a preparation method and application thereof. Arundo donax cv.Lv zhou.No.1 is used as the raw material of the chemi-mechanical pulp, the holocellulose content of the Arundo donax cv.Lv zhou.No.1 is high, the fiber form is good, fine fiber components are few, the average length of fibers is long and is longer than that of conventional broad-leaf wood such as eucalyptus and poplar, and in the aspect of the fiber form, the eucalyptus is a high-quality pulping fiber raw material. The pulping yield of the chemical-mechanical pulp is high, the strength of fibers in the prepared pulp is high, the quality of the pulp is improved, the strength and folding resistance of cartons or hardboards and the like produced by applying the pulp are improved, and the pulp can replace waste paper pulp to be used for papermaking of various packaging paperboards and paper pulp molding products. The method overcomes the defects of ecological pressure caused by massive forest felling in the existing woody raw material pulping, low yield of herbaceous raw material pulping, large black liquor generation amount and serious environmental pollution.

Description

technical field [0001] The invention belongs to the technical field of pulping and papermaking, and more specifically relates to a fungus grass chemical pulp and its preparation method and application. Background technique [0002] Chemi-machanical pulp (English name chemi-machanical pulp) referred to as CMP is the name of an intermediate product pulp in the paper manufacturing process. The raw materials for making paper are various fiber raw materials, such as wood, non-wood (such as straw, wheat straw, bagasse, bamboo, cotton stalks, etc.), bast fibers (hemp, mulberry bark, wolfberry bark, etc.), waste cotton (or cotton linters) and other fibers. These fibrous raw materials first need to be chopped and cooked to make pulp. Due to the different composition and chemical composition of these fibrous materials, there are different pulping processes. The pulp manufacturing process is to dissociate the fibers in these fiber raw materials by chemical methods or mechanical metho...

Claims

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Application Information

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IPC IPC(8): D21B1/02D21C1/00D21C9/02D21C9/18D21D5/02
CPCD21B1/023D21B1/02D21C1/00D21C9/02D21C9/18D21D5/02
Inventor 刘平山林占熺林冬梅王志明李建民吕祥熙
Owner ZHONGFU STRAIT (PINGTAN) DEV CO LTD