Method and a system for processing material that contains biomass

Patent metadata

Field	Value
Publication number	US-9580246-B2
Application number	US-201113638784-A
Country	US
Kind code	B2
Filing date	Apr 1, 2011
Priority date	Apr 1, 2010
Publication date	Feb 28, 2017
Grant date	Feb 28, 2017

Abstract

A method for processing material that contains biomass. The material is led onto a conveyor. The conveyor conveys the material to an apparatus for mechanical processing and/or to a further processing plant. The moisture content is measured and/or the size of pieces of non-combustible material and/or the content of non-combustible material in the material flow is measured in connection with the conveyor. Based on at least one of the measurements, material is conveyed to the material to be conveyed for further processing and/or to the apparatus for mechanical processing, or to at least one material to be conveyed elsewhere than to the further processing plant or the apparatus for mechanical processing. Also a system for processing material that contains biomass.

First claim

The invention claimed is:

1. A method for processing a material that contains wood-based material, in which method the material is guided to a conveyor and by the conveyor to at least one of an apparatus for mechanical processing and to a further processing plant, the method comprising:
measuring the moisture content, the size of pieces of non-combustible material and the quantity of non-combustible material in the material in connection with said conveyor,
providing quality feedback data on the material, wherein the quality feedback data is based on the measured moisture content, the measured size of non-combustible material, and the measured quantity of non-combustible material in the material in connection with said conveyor,
conveying, on the basis of said measurements, measured material to at least one of the further processing plant and the apparatus of mechanical processing.

2. The method according to claim 1 , wherein the method comprises
conveying the measured material to said apparatus of mechanical processing, by means of the conveyor,
measuring upstream of said apparatus of the mechanical processing, the size of pieces of non-combustible material with a measuring device, and
determining, based on the result of the measurements, whether said measured material is to be led away from the conveyor or whether it is to be led by the conveyor to the apparatus of mechanical processing, to be crushed.

3. The method according to claim 1 , wherein the method comprises
measuring at least one of the size of pieces and quantity of combustible material in the material flow in connection with the conveyor and leading at least part of the measured material to a further processing plant, and
the method further comprising at least one of adjusting the functional parameters of the further processing plant and controlling the quality of the measured material to be led to the further processing plant on the basis of the measurements on the size of pieces or the quantity of combustible material.

4. The method according to claim 1 , wherein the conveyor comprises a first conveyor and a second conveyor, material is led by the first conveyor to the apparatus of mechanical processing, by which at least part of the material is crushed before the material is led from the apparatus of mechanical processing to the second conveyor.

5. The method according to claim 2 , wherein when the measurements show that at least one of the size of pieces and the quantity of noncombustible material exceeds a predetermined limit value, at least one of the following steps is taken:
said measured material is led to reject, and
the apparatus of mechanical processing is stopped for a time that is sufficiently long for the harmful material to be discharged from the conveyor leading to said apparatus of mechanical processing.

6. The method according to claim 1 , wherein the method further comprises:
determining the weight of said material,
determining the quantity of combustible and non-combustible material in connection with the conveyor, and
determining the energy content of said material on the basis of the data determined in the preceding steps and an upper heat value coefficient.

7. The method according to claim 1 , wherein the method comprises providing quality feedback data on the supplied material, by entering characteristic data on the material to the quality feedback system, on the basis of which characteristic data the quality feedback system produces a quality feedback report that contains quality data produced on the basis of said entered data, concerning said material.

8. The method according to claim 7 , wherein the method comprises entering one or more of the following data on the material in the quality feedback system:
the quantity of combustible material in the material,
the quantity of non-combustible material in the material,
the size of pieces of combustible material,
the size of pieces of non-combustible material,
the moisture content or the dry matter content of the material, and
the upper heat value coefficient of the combustible material,
wherein the method comprises giving one or more of the following items of data as quality feedback data:
the monetary value of the material,
the energy content of the material in the state when received,
the energy content of material suitable for further processing,
the quality value of material,
the size of pieces of combustible material, and
the size of pieces of non-combustible material.

9. The method according to claim 7 , wherein the method comprises entering the size of pieces of at least one of non-combustible and combustible material as data to the quality feedback system, wherein the quality feedback data comprises at least said data on at least one of the size of pieces of non-combustible and combustible material.

10. The method according to claim 7 , wherein the method comprises entering, as data, of at least the moisture content of the supplied material, the quantity of combustible or non-combustible material, and the upper heat value coefficient of combustible material, wherein the quality feedback data comprises at least the data on the energy content of said supplied material.

11. The method according to claim 7 , wherein the method comprises determining and setting of one or more of the following data as the quality feedback data:
the monetary value of the supplied material,
the energy content of the supplied material in the state when delivered,
the energy content of the part of supplied material that is suitable for further processing,
the weight of the supplied material,
the upper heat value coefficient of the supplied material, and
the quality value of the supplied material, or the moisture content of the supplied material.

12. A system for processing material that contains wood-based material, the system comprising:
at least one conveyor; and
an apparatus for mechanical processing;
wherein the system further comprises:
measuring devices for measuring the moisture content, the quantity of non-combustible material the size of pieces of non-combustible material in the material in connection with said conveyor,
wherein
the at least one conveyor is arranged for conveying said material, on the basis of said measurements, to a further processing plant or to the apparatus for mechanical processing; and
the system further comprises:
a transfer apparatus for transferring said material from the conveyor, on the basis of said measurements to at least one other place; and
a quality feedback system for producing quality feedback data on the material, wherein the quality feedback data is based on the measured moisture content, and the measured size and the measured quantity of non-combustible material from the material.

13. The system according to claim 12 , wherein
the at least one conveyor comprises a first conveyor arranged to convey the material to said apparatus for mechanical processing,
the measuring devices measure the size of pieces of non-combustible material from the material in connection with the first conveyor,
the transfer apparatus transfers material from the first conveyor to reject upstream of the apparatus for mechanical processing when at least one measurement exceeds a predetermined limit value.

14. The system according to claim 13 , wherein
the at least one conveyor further comprises a second conveyor for conveying material to a further processing plant,
the measuring devices further measure at least one of the size of pieces and the quantity of combustible material in the material in connection with the second conveyor,

Assignees

• Laakkonen Perttu
• Palokangas Juha
• Upm Kymmene Corp

Inventors

• Laakkonen Perttu
• Palokangas Juha

Classifications

• F23N2221/10

  Analysing fuel properties, e.g. density, calorific · CPC title

• F23G2900/50214

  Separating non combustible matters · CPC title

• B07C5/14

  Sorting timber or logs {, e.g. tree trunks, beams, planks or the like} · CPC title

• F23G7/10

  of field or garden waste {or biomasses} · CPC title

• F23G5/02 Primary

  with pretreatment · CPC title