 Kraft mill recovery system |
| What is claimed is: 1. In the process for the pulping of lignocellulosic material wherein a. ... |
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| Purification process |
| OF THE INVENTION Any water-soluble inorganic carbonate or bicarbonate can be used in this ... |
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| Method for removal of monovalent ions from ZnSO.sub.4 electrolyte by electrodialysis |
| We claim: 1. A method for the purification of zinc sulfate electrolyte containing concentrations of ... |
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| Method of producing acids and alkalis |
| In order to solve the above-mentioned problems, the present inventors have conducted keen study and ... |
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| Multiple capillary biochemical analyzer with barrier member |
| OF PREFERRED EMBODIMENTS Reference is first made to FIGS. 1 and 2, which show an analyzer 20 for ... |
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| Blood and tissue detoxification apparatus |
| FIG. 1 shows schematically, partly in section and partly in plan view, an implantable cell in ... |
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| Process and apparatus for the quantitative determination of cations or anions by ion chromatography |
| OF THE PREFERRED EMBODIMENTS The invention consists of a procedure and an apparatus as follows: ... |
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| Method for balancing background conductivity for ion chromatography |
| In accordance with the invention, a method has been provided for balancing the background ... |
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| Apparatus for chromatographic analysis of ionic species |
| It is, therefore, an object of the invention to provide an apparatus and method for the ion ... |
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| Electodeionization apparatus and method |
| The present invention provides a method and apparatus capable of continuously producing water of up ... |
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Method in connection with the production of pulp, paper or paperboard
| Details |
Inventors: Badenlid, Raija; Andersson, Staffan; Stromberg, Eva-Lena; Bergstrom, Jenny;
Assignee: Stora Enso Aktiebolag (Falun, SE)
Primary Examiner: Halpern; Mark
Assistant Examiner:
Attorney, Agent or Firm: Nixon & Vanderhye
Method for predicting properties of a product of cellulose-fibre-based pulp, paper or paperboard, wherein a suspension of cellulose fibre is subjected to analysis, during manufacture of the product, by spectroscopic measurements of a sample quantity of the suspension, in a spectrum in the wavelength range 200 2500 nm. The method comprises diluting each sample quantity prior to analysis, dewatering and drying one partial flow and subjecting that partial flow to spectroscopic measurements, and analyzing a second partial flow of the diluted sample quantity for physical fiber data, by means of image analysis. Each sample quantity analyzed generates at least 100 data points from the spectroscopic measurement distributed in the selected spectrum, and at least 50 data points with regard to the physical fibre data, in the form of one or more physical fibre property distributions with regard to at least one physical property selected from fibre length, fibre width and fibre shape. The data points are combined in multivariate data processing for prediction of properties of the product, on the basis of calibrations previously executed on samples with known properties. |
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DETAILED DESCRIPTION The invention claimed is: 1.
Method for predicting properties of a product that consists of cellulose-fibre-based pulp, paper or paperboard, wherein a suspension of cellulose fibre is subjected to analysis during manufacture of the product by spectroscopic measurements of a sample quantity of said suspension in a selected spectrum in the wavelength range 200 25000 nm, said method comprising: diluting each sample quantity prior to said analysis; dewatering and drying a first partial flow; subjecting said first partial flow to spectroscopic measurements in a selected spectrum in the wavelength range 200 25000 nm; analyzing a second partial flow of the diluted sample quantity for physical fibre data, by means of image analysis; each sample quantity analysed generating at least 100 data points from the spectroscopic measurements distributed in said selected spectrum, and at least 50 data points with regard to said physical fibre data, in the form of one or more physical fibre property distributions with regard to at least one physical property in the group consisting of fibre length, fibre width and fibre shape, which total of at least 150 data points are combined in multivariate data processing, for prediction of physical properties of said product, on the basis of calibrations previously executed that were carried out on samples with known physical properties.
2.
Method according to claim 1, wherein said sample quantity of said suspension is extracted for analysis at-line or on-line in a process line for said manufacture of the product at least once every two hours.
3.
Method according to claim 2, wherein said sample quantity suspension is extracted at least once per hour.
4.
Method according to claim 2, wherein said sample quantity suspension is extracted at least four times per hour.
5.
Method according to claim 2, wherein said sample quantity is extracted in a process line for pulp production.
6.
Method according to claim 5, wherein said calibrations comprise calibrations against pulp samples that have been beaten with a number of different energy inputs, said prediction giving a measure of the product attributes that it is possible to achieve with one or more given energy inputs
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Liquid Purification 
