The quality assurance specifications for the
demanufacture of CFC-containing refrigerators and freezer appliances
focus on the two main stages of refrigerator recycling. The first
stage involves the collection and storage of the waste appliances,
the second stage is concerned with their processing. The processing
stage is itself further divided into Step I (extraction of CFC refrigerant
from the cooling circuit), Step II (extraction of CFC blowing agent
from the insulating material) and finally, the handling of the output
material streams from Step I and Step II.
A fundamental principle of the demanufacturing specifications
is that every waste appliance submitted for recycling is indeed
subjected to each stage of the demanufacturing process.
Excerpts from the RAL Quality Assurance and
Test Specifications:
1.
Collection and storage:
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Preventing the release of CFCs as a result
of damage to appliances during transportation, delivery and
storage |
 |
Compliance with the provisions of water management
legislation |
 |
... |
2. Processing
Step I
 |
Joint extraction under vacuum of CFCs and refrigerator
oil from the cooling circuit |
 |
Separation of the CFC from the oil |
 |
Compliance with stipulated minimum acceptable
average recoverylevels
(115 g CFC R12 per appliance) |
 |
Measures to prevent process manipulation |
 |
... |
Step II
 |
Crushing, grinding or shredding of pretreated
appliances in an encapsulated facility |
 |
Complete separation of PU foam from casing
material |
 |
Complete thermal desorption of CFCs from the
PU foam matrix |
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Compliance with stipulated minimum acceptable
average recovery levels (283 g CFC R11 per appliance from a
defined input stream) |
 |
Adherence to the strict limits imposed on the
amount
of residual CFCs permitted in the PU foam, the exhaust air stream
and in the water discharged from the processing plant |
 |
Compliance with a minimum purity level of 99
% for the CFCs recovered |
 |
... |
Handling of the output streams prior
to recycling or disposal
 |
Separation and classification of the components
and materials recovered during processing into recyclable fractions |
 |
Storage of the individual material fractions
in accordance with relevant legal provisions in order to avoid
environmental contamination |
 |
... |
It goes without saying that compliance with all
environmentally relevant statutory provisions and official regulations
is a fundamental prerequisite of the RAL Quality Assurance and Test
Specifications. Equally self-evident is the fact that all input
and output material streams are fully documented.
Download
Quality Assurance and Test Specifications (pdf)
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