Energia, contesto globale, sostenibilit

1
Pirelli Ambiente Renewable Energy
Quality control in SRF productionLuca
ZucchelliQUOVADIS WORKSHOPRome - October 24,
2007
2
Quality in SRF production

• The Italian drivers that move towards a total
  quality management system in SRF production
  plants are
• Normative the article 229 of the Decree n
  152/2006 points out that the high quality SRF,
  produced whithin a production process adopting a
  quality management system based upon the standard
  ISO 9001, and destined for effective use within a
  co-combustion process in energy production plants
  and in cement kilns, is excluded from the waste
  context.
• Economical the SRF producer has to certify its
  production process in order to fulfill the
  customer requirements in terms of guaranteed
  technological and environmental performance of
  the combustible.

3
The product and process control
Fundamental parameter to be controlled
NCV Chlorine Mercury
Economical parameter
Technological parameter
Environmental parameter
4
THE CHLORINE PROBLEM
A TECHNOLOGICAL PROBLEM The critical phase is the
SFR oxidation in the rotary kiln
Dioxins and Furans genesis High temperatures
2000C No changes with/without HQ-SRF Analysis
show dioxins and furans values extremely lower
compared to WID limits
Corrosion and clogging problems By-pass
intallation to devert the flues gases avoiding
the alkaline-chlorine salts condensation
cdr-p
Quality Management System
Analysis of the chlorine content of the SRF and
of the raw materials
5
THE CHLORINE PROBLEM

• THE METHOD
• Upgrade of the method difficulties in
  measuring, with the traditional method for
  calorimetric bomb potenziomentric, the chlorine
  content of materials with a content of plastics
  and rubber exceeding 10 ? evaluation of the
  possibility to extend the method to all SRFs
• Samples size shredded size lt1 mm

cdr-p

• THE RESULTS
• The values obtained are between 0,4 and 0,8
• Difficulties in classification (overlapping
  problem)

• NEW TECHNOLOGIES
• Development of the NIR technology for low
  chlorine SRF production and to reduce the
  variability of data obtained

6
Chlorine
Days
7
Chlorine
Days
8
Chlorine
Days
9
Chlorine
Days
10
Chlorine
Days
11
THE HEAVY METALS PROBLEM
AN ENVIRONMENTAL PROBLEM Mercury (Hg), because
of its volatility, is the environmental parameter
to keep under control in SRF production
Possibility to apply the same statistical method
used for chlorine measurement, but the need of a
suitable number of assays for the statistical
analysis implies the choice of the right method
for the collection of data.
Spectrometry Atomic Absorption

• relatively cheap
• user friendly
• limited analysis time

Suitable number of Hg measurements
12
(No Transcript)
13
Lot December
Lot January
14
QUALITY COSTS
15
QUALITY COSTS
16
CONCLUSIONS

• The statistical method, used to evaluate the
  trends of chlorine and mercury data, allows to
  establish any drift from the customer
  requirements due to undesired materials that
  could be entered the production process.
• Moreover this method can be used as predictive
  method for recognizing anomalous trends of the
  mercury and chlorine concentration in order to
  intervene promptly avoiding dangerous effects for
  the SRF final user and for the environment.

The QMS support is fundamental for SRF producers,
providing all the necessary instruments to keep
the process and the product under control and
best fulfill all the customer requirement.