Method for quickly analyzing proportions of tree species of mixed pulp wood by aid of near infrared spectrum technologies

Abstract

The invention discloses a method for quickly analyzing the proportions of tree species of mixed pulp wood by the aid of near infrared spectrum technologies. The method is applicable to detecting mass fractions of various wood species when different types of wood are subjected to mixed pulping, and information of the wood species of the pulp wood can be subjected to online analysis and process control by the aid of combined nondestructive analysis merits of near infrared technologies. The method includes (1), smashing pure pulp wood chips of the different tree species and screening the smashed pure pulp wood chips to obtain wood powder which can flow through 20-mesh sieves; (2), uniformly mixing two types of wood powder according to certain proportions to obtain a series of standard samples and acquiring near infrared spectra of the standard samples; (3), associating tree species mass fraction information of the standard samples with data of the near infrared spectra of the standard samples by the aid of chemometrics processes to build mathematic prediction models; (4), analyzing data of near infrared spectra of samples with unknown mixed proportions by the aid of the built mathematic prediction models. The method has the advantage that information of the proportions of the various tree species in the unknown samples can be quickly and accurately determined by the aid of the method.

Description

technical field [0001] The invention relates to an analysis method for detecting the proportion information of various tree species in mixed pulped wood, in particular to a method for rapidly analyzing the proportion information of mixed pulped wood species by using near-infrared spectrum technology. Background technique [0002] Wood is the main raw material in the pulp and paper industry, and its material properties are closely related to the quality of end products. With the expansion of market demand and the gradual shortage of high-quality wood resources, the use of a single variety of high-quality wood raw materials for pulping can no longer meet the actual production needs. Therefore, it has become inevitable to use a variety of wood fiber raw materials to make pulp and paper. Wood raw materials of different tree species or different origins will also be continuously mixed during transportation, transportation, etc. Since there are often large differences between diff...

AI Technical Summary

Problems solved by technology

[0003] In the actual production process of pulp and paper enterprises, pulping raw materials usually use mixed wood chips of two different species, and according to the information provided by the wood chip suppliers, it is often only possible to clarify the tree species information of the mixed wood chips, but for each tree species Proportion, but there is no effective analysis method

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