A detection and evaluation method of pulp deinking based on digital image processing

Abstract

The invention belongs to the technical field of pulp deinking, and discloses a pulp deinking detection and evaluation method based on digital image processing. Through CCD imaging and according to a method of image processing, the particle diameter, the quantity, the agglomeration degree and the minimal detection precision of ink left in deinked pulp are calculated; according to relevant calculation parameters, the deinking effect of the deinked pulp is calculated. The method specifically comprises the steps of continuously sampling three times at the bottom, the middle and the top of deinkedpulp suspension liquid from a time t0, after an interval time of 10 minutes, fully stirring the pulp suspension liquid and repeating the sampling process to totally sample five times. On the basis ofa pulp deinking process, a scientific sampling method is formulated; through the combination of a Poisson distribution law of deinked pulp residual ink and through an image processing technology, a CCD image of the deinked pulp is analyzed, relevant data which can represent the pulp deinking effect is calculated, and the insufficiencies of a deinked pulp whiteness method and an REIC method are made up for.

Description

technical field [0001] The invention belongs to the technical field of pulp deinking, in particular to a digital image processing-based detection and evaluation method for pulp deinking. Background technique [0002] At present, with the development of the paper industry, the fiber raw materials (wood) of the paper industry are becoming increasingly tense. For my country, because the forest coverage area is far below the global average level, the per capita forest coverage area is only 1 / 4 of the global average level. It is bound to cause the shortage of papermaking fiber raw materials in my country. If excessive felling is used to meet the demand for papermaking raw materials, it is obviously not advisable from an ecological point of view. From the perspective of environmental protection and energy consumption, the water consumption, electricity consumption and steam consumption of recycled pulp (waste paper reuse) are much lower than bleached straw pulp and bleached wood...

AI Technical Summary

Problems solved by technology

The value measured by REIC method is not only related to the amount of ink, but also related to the degree of agglomeration of ink particles; neither method can accurately reflect the deinking effect of deinked pulp;

[0007] Unable to accurately calculate the quantity, morphological parameters, degree of dispersion and particle size range of residual ink; unable to accurately reflect the real effect of waste paper deinking

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