Method for detecting content of micro-stickies in paper pulp

A detection method and sticky technology, which is applied in the field of papermaking, can solve the problems of lack of detection instruments and equipment, production process equipment and parameter scientific research obstacles, etc., and achieve the effect of convenient and fast detection method and direct and clear results

Inactive Publication Date: 2014-04-23
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] So far, there is no uniform standard and method for the correct detection of stickies in the paper industry, and of course there are no applicable detection instruments

Method used

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  • Method for detecting content of micro-stickies in paper pulp

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A method for detecting the content of fine stickies in pulp, comprising the following steps:

[0034] 1) Firstly, take pulp samples with different concentrations, add the first dispersion medium and stir, and prepare 500mL of suspensions with a mass fraction of 0.1% respectively, requiring uniform dispersion, and tap water is selected as the first dispersion medium;

[0035] 2) Then select the corresponding fluorescent dye, add distilled water and stir. In this experiment, Nile Red dye is selected to prepare a Nile Red dye solution with a mass fraction of 0.5%, and it is stored in a dark place at 5°C;

[0036] 3) When measuring, add 5 mL of the Nile Red dye solution prepared above to the 500 mL suspension in step 1); mix thoroughly for 10 minutes, and stir evenly to fully dye the lipid impurities in the pulp sample;

[0037] 4) Take the first dispersion medium, that is, tap water, and measure the fluorescence value, and use the measurement result as a blank value; respe...

Embodiment 2

[0040] A method for detecting the content of fine stickies in pulp, comprising the following steps:

[0041] 1) First, take pulp samples of different concentrations, add the first dispersion medium and stir, and prepare 500mL of suspensions with a mass fraction of 0.1% respectively. The first dispersion is required to be uniform, and tap water is selected as the first dispersion medium;

[0042] 2) Then select the corresponding fluorescent dye, add distilled water and stir. In this experiment, Nile Red dye is selected to prepare a Nile Red dye solution with a mass fraction of 0.5%, and it is stored in a dark place at 5°C;

[0043]3) During the measurement, add 10 mL of the above-prepared Nile Red dye solution to the 500 mL pulp fiber suspension in step 1); mix thoroughly for 10 minutes, and stir evenly to fully dye the lipid impurities in the pulp sample;

[0044] 4) Take the first dispersion medium, that is, tap water, and measure the fluorescence value, and use the measureme...

Embodiment 3

[0047] 1) First, take pulp samples with different concentrations, add the first dispersion medium and stir, and prepare 500mL of suspensions with a fraction of 0.5% respectively, requiring uniform dispersion, and tap water is selected as the dispersion medium;

[0048] 2) Then select the corresponding fluorescent dye, add distilled water and stir. In this experiment, Nile Red dye is selected to prepare a Nile Red dye solution with a mass fraction of 0.5%, and it is stored in a dark place at 5°C;

[0049] 3) During the measurement, add 15 mL of the above-prepared Nile Red dye solution to the 500 mL pulp fiber suspension in step 1); mix thoroughly for 10 minutes, and stir evenly to fully dye the lipid impurities in the pulp sample;

[0050] 4) Take the pulp dispersion medium, that is, tap water, and measure the fluorescence value, and the measurement result is used as a blank value; respectively take the uniformly mixed dyed pulp samples, and measure the fluorescence value; accor...

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Abstract

The invention discloses a method for detecting the content of micro-stickies in paper pulp. The method comprises the following steps: firstly, preparing suspension of a paper pulp sample required to be measured according to concentration need, and dispersing uniformly; then selecting corresponding fluorescent dye, taking Nile red dye as an example, and preparing with certain concentration; adding the prepared fluorescent dye into the suspension of the to-be-detected paper pulp sample according to certain proportion; mixing uniformly for a period of time; taking the mixed liquid of a proper amount of suspension of the to-be-detected paper pulp sample and the fluorescent dye, and measuring the fluorescence value by a fluorospectro photometer, thereby obtaining the content of the micro-stickies in the paper pulp according to the measured fluorescence value. The detection method provided by the invention is convenient and rapid; the test results are good in reliability; the content of the stickies are directly displayed in front of operators in a data type; the detection method is convenient to apply in production for regular monitoring.

Description

technical field [0001] The invention belongs to the field of papermaking, and in particular relates to a method for detecting the content of fine stickies, especially hydrophobic lipid impurities, in pulp. Background technique [0002] With the increasing shortage of fiber raw materials and the gradual increase in the amount of recycled waste paper, impurities in waste paper, especially sticky impurities, cause paper machine failure and product quality problems, which have become the biggest problems for papermakers. In order to find a reasonable method for removing stickies in the pulp system, it is necessary to find out a method for correctly detecting the content of stickies in the pulp system. Different pulps contain different concentrations of stickies, and their contents are also different. Correctly detecting the content of stickies in the pulp is an important basis for determining a reliable treatment process in the production process, ensuring normal production, an...

Claims

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Application Information

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IPC IPC(8): G01N1/30G01N21/64G01N21/78
Inventor 张素风孙杰刘媛
Owner SHAANXI UNIV OF SCI & TECH
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