sistema de control online de calidad de pellets de madera
TRANSCRIPT
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• BEA - About us
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BEA – About us
BEA offers technical services for production and combustion of
solid biofuels.
Quality control and fuel analysis
Experts with > 20 years experience
Contract with 80+ pellet production plants for ENplus/DINplus
inspection
Accredited laboratory for fuel analysis
Supply of lab equipment
for pellet plants
for fuel laboratories
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MECHANICAL DURABILITY
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1.0 To get started – the most basic production
Control water content of raw material to keep in defined range
QUALITY CONTROL IN PELLET PRODUCTION
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1.0 To get started – the most basic production
• No stable production, very low availability of plant
• No Certification
• High power consumption, high wear
QUALITY CONTROL IN PELLET PRODUCTION
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2.0 simple quality control
Simple instruments to check few product parameters
• Results sometimes very wrong!
• Not suitable to control and stabilize production
• No Certification
QUALITY CONTROL IN PELLET PRODUCTION
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QUALITY CONTROL IN PELLET PRODUCTION
3.0 minimum quality control according
ENplus/DINplus
Product control: Fines, Oversizes, Bulk
density, Water content, Durability
Sampling once per shift
• Sufficient for Certification
• Results sometimes wrong
• Limited suitability for process control
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3.5 quality control exceeding ENplus/DINplus
• Higher sampling and testing frequencies
• Additional parameters like ash content
• Checks along the production process e.g. online moisture control and manual sampling for calibration
• Investment in high quality instruments with improved precision
QUALITY CONTROL IN PELLET PRODUCTION
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Reproducibility of test methods is (often) limited
High influence of staff
on test result
analytical skills and understanding may be limited
mistakes due to „boring“ routine (little validation)
motivation (decreases e.g. night shifts)
may get blamed when quality is out of specification
Limited staff resources
keeping production running first goal;
quality control reduced when plant does not operate well
Non-compliances may be very costly
BUT STILL, CHALLENGES REMAIN
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Automatic analyzers
4.0 online quality control systems
Reduce human influence
May increase repeatability (quality of results)
May be used for plant control
Improved quality of product (incl. reduced losses due to fines)
Reduction of wear and energy consumption
Man-less operation (e.g. night-shift)
Types and principles
Automatic analysis Automatic sampling and analysis (online)
Single parameters Multiple parameters
Physical-mechanical methods Spectroscopy
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System for durability:
Fully automatic sampling
Reproducible accuracy of ± 0.1%
Advantage: fast
Disadvantage: not according
reference method
online, physical-mechanical single parameter
Source: http://www.tekpro.com/nhp300.htm
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online, physical-mechanical some parameters
System for bulk density, moisture,
temperature:
Fully automatic sampling and analysis
Output signals may be integrated in plant
control
Advantage: fast, reliable
Disadvantage: complex system
but still not all required parameters
Source: http://www.uny-konsult.se/Pellmes2.htm
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System for moisture, foreign matter, fuel volume
Real-time using X-ray technology
Designed for power plants, sawmills and bio-refinaries
Fully automatic on-line analysis
Measures whole amount of fuel
Advantage: fast, whole amount of fuel
Disadvantage: complex system but important pellet parameters
missing
online, spectrometry some parameters
Source: www.inray.fi
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online, spectrometry some parameters
High end Real-time NIR - Technology
Highly developed systems from other industries (food, plastics,
board and wood-panels, etc.)
Lab and on-line analysis systems
Many parameters possible: moisture, extractives, proteins, ash
(density, durability, energy content)
Source: www.perten.com
Source: www.buhlergroup.com
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online, spectrometry some parameters
Advantage: fast, broad information
Disadvantage:
• complex system needs high level of method
development and calibration.
• Parameters like durability determined
indirectly – change of e.g. raw material or
process need recalibration
• Parameters missing e.g. length distribution
Source: www.buhlergroup.com
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online, physical-mechanical all parameters
BEA - Development 2013-2016
Developed only for pellet industry
Only system worldwide using ISO methods
First instrument installed December 2016 –
in full commercial operation since start
2 systems are currently installed
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100% automatic, eliminating any staff influence
All ENplus quality requirements:
durability
moisture
bulk density
temperature
optional: length distribution
Documentation
within instrument
exchange with plant control
and remote access
Key data
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r interlab. comp.
STD BEA-PPA
Bulk density 13 kg/m³ 3 kg/m³
Durability 0,17 % < 0,05 %
Moisture 0,20 % < 0,15%
Performance
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