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Method for quickly evaluating unik sulfate pulping technology

A kraft method and jacaranda technology, applied in the field of pulping and papermaking, can solve the problems of unqualified paper, inability to adjust the pulping process in time and effectively, long detection cycle, etc., and achieve strong practicability, suitable for promotion, simple and efficient method Effect

Active Publication Date: 2015-02-11
HAIMEN CANGYUN MACHINERY CO LTD
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AI Technical Summary

Problems solved by technology

[0007] However, the current evaluation of the quality of the pulping process is mainly based on the physical properties of the paper that is finally made. In the process of actual process exploration, the pulp after cooking must first balance the moisture for 24 hours, and then make paper, and the obtained paper is balanced. The physical performance indicators can only be tested after 24 hours of moisture, and the whole process takes more than 3 days
In the process of large-scale single factor and orthogonal experiments, the entire detection period is too long, and the pulping process cannot be adjusted in a timely and effective manner, resulting in continuous unqualified problems in the produced paper, causing huge economic losses to the enterprise

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1 Nanyang jacaranda kraft cooking process evaluation

[0028] 1. Preparation of Jacaranda wood chips

[0029] Preparation steps:

[0030] (1) Washing: the jacaranda wood is first washed with tap water several times to remove a small amount of white powder and dirt attached to the surface of the jacaranda wood, so as to prevent the metal and other components on the surface from adversely affecting the subsequent pulping and bleaching processes;

[0031] (2) Pressing: use an ax to split the jacaranda wood into strips with a width of about 4 to 5 cm, and then press the bamboo strips through a press to remove the air in the cell cavity and part of the bamboo filtrate. After pressing, the jacaranda wood forms radial stripes on the surface, which is easy to infiltrate the cooking liquid evenly during the cooking process, and accelerates the reaction rate between the jacaranda wood and the cooking liquid.

[0032] (3) air-drying: expose the above-mentioned jacaranda...

Embodiment 2

[0051] Embodiment 2 Jacaranda kraft cooking process evaluation

[0052] 1. Preparation of Jacaranda wood chips

[0053] Preparation steps:

[0054] (1) Washing: the jacaranda wood is first washed with tap water several times to remove a small amount of white powder and dirt attached to the surface of the jacaranda wood, so as to prevent the metal and other components on the surface from adversely affecting the subsequent pulping and bleaching processes;

[0055] (2) Pressing: use an ax to split the jacaranda wood into strips with a width of about 4 to 5 cm, and then press the bamboo strips through a press to remove the air in the cell cavity and part of the bamboo filtrate. After pressing, the jacaranda wood forms radial stripes on the surface, which is easy to penetrate the cooking liquid evenly during the cooking process, and speeds up the reaction rate between the jacaranda wood and the cooking liquid.

[0056] (3) air-drying: expose the above-mentioned jacaranda strips...

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Abstract

The invention provides a method for quickly evaluating the quality of a unik sulfate pulping technology. The method comprises the following steps: (a) measuring the lignin content X (%) of a unik raw material; (b) stewing by adopting a sulfate method to prepare unik pulp, wherein the alkali amount Y (%) is metered by NaOH; (c) measuring the alkali residue content A (%) of stewing waste liquid and the kappa value K of the pulp; (d) calculating the quality of the unik sulfate pulping technology according to the following formula, if K is smaller than or equal to Z1=X*29.9+Y*55.1 and A is smaller than or equal to Z2=X*0.13+Y*0.27, judging that the technology is qualified, otherwise, judging that the technology is disqualified. The method is simple, high in efficiency, high in practicability and suitable for being popularized, and a novel method is provided for quickly adjusting a unik sulfate pulp stewing technology.

Description

[0001] technical field [0002] The invention belongs to the field of pulping and papermaking, and relates to a method for quickly evaluating the kraft pulping process of jacaranda wood. Background technique [0003] Papermaking industrial wastewater is one of the sources of industrial pollution, accounting for about 10% of the total industrial wastewater in my country. Pulp and paper industry wastewater mainly contains high-concentration organic wastewater, and also contains lignin, sulfide, chloride and other pollutants. The biggest feature of papermaking wastewater is its large volume of wastewater and high concentration of COD. However, with the strengthening of environmental protection in the papermaking industry, the pollution of papermaking wastewater has been reduced year by year. In 2010, the total amount of COD produced in papermaking wastewater was about 952,000 tons. ; The pollution discharged by different types of papermaking enterprises varies greatly. The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/00
Inventor 朱琳
Owner HAIMEN CANGYUN MACHINERY CO LTD
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