Sea Marconi - Publication of technical Brochure CIGRE n. 413 - Insulating oil Regeneration and Dehalogenation

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Approfondimenti: Publication of technical Brochure CIGRE n. 413 - Insulating oil Regeneration and Dehalogenation

The CIGRE (CONSEIL INTERNATIONAL DES GRANDS RÉSEAUX ÉLECTRIQUES), after about 6 years of work has published Technical Brochure no. 413 “Insulating oil Regeneration and Dehalogenation” (April 2010), which represents a synthesis of the methodologies and techniques for the treatment of mineral insulating oils for transformers. The doucument formalises also the procedures and requisites to evaluate and implement the Best Available Techniques (BAT) – and the Best Environmental Practices (BEP).
The working group, starter in 2004, has been coordinated by prof. Bruce Pahlavanpour with the participation of the most qualified experts in the sector at international level.
Vander Tumiatti, in his position as Italian export and Assistant Secretary IEC TC10, actively participated with the forty years experience of Sea Marconi (since 1968). In particular, many contributions were provided in terms of solutions for the management of fleets of machines with insulating liquids, providing “case histories” together with an updated technical-scientific bibliography.

Among the decontamination techniques of the oils contaminated by PCBs, the CIGRE document makes a precise reference to the CDP Process^® (patent by Sea Marconi), the Best Available Technique (MTD – BAT) for the dehalogenation of PCBs in continuous mode, closed loop, on-site, not requiring the draining, even partially of the transformer as well as the technological systems , DMU (Decontamination Mobile Unit).
The BATs & BEPs are already currently a integral part in the on-going sustainable technological solutions of Sea Marconi.
These solutions ensure the full compliance with the prescriptions of the European directives, national laws and technical norms of the sector (IEC, CEN) as well as the requisites specified by this CIGRE brochure.

GreenPro Transfo, the line of products and services by Sea Marconi is able to censure an effective management, at international level, of the Life Cycle Management (LCM) of insulating liquids and the fleet of transformers and strategic units in the generation, transportation, distribution and use of electric power and includes:
- DeosVision^® : the diagnostic coverage service for the prevention of damages and the inventory of specific risks (PCBs, PCAs, corrosive sulfur).
- CDP Process^®: dehalogenation/detoxification service of PCBs/POPs for the protection of the environment.
- Chedcos^® : the service including the activities for the physical decontamination, depolarisation and selective depolarisation for the conservation of transformers and the insulating oils they contain.
The contents of CIGRE brochure no. 413 are: “Table of Contents

1 Executive summary

2 Introduction

3 Definitions

4 Insulating materials

4.1 Mineral Oil

4.2 Transformr oil

4.2.1 Chemical composition

4.3 Refining techniques

4.4 Requirements of insulating oil

4.4.1 Functional properties

4.4.2 Refining and stability

4.4.3 Performance

4.4.4 Health, Safety, and Environmental (HSE) properties

4.4.5 Specific requirements for special application

4.5 Cellulosic insulating paper

4.5.1 Manufacturing processes for Kraft paper

4.5.2 Chemical composition

4.6 Mechanism of Kraft paper (cellulose) degradation

4.7 Properties of paper

5 Oil contamination and degradation

5.1 Physical contamination

5.1.1Water

5.1.2 Particles

5.2 Chemical contamination

5.3 Oil degradation

5.3.1 Chemical Breakdown of a Transformer Oil

5.3.2 Polychlorinated biphenyl (PCB) contamination

6 Health and safety

6.1 Polycyclic Aromatic Hydrocarbons (PAHs)

6.1.1 PAHs, human health and risks

6.1.2 PAHs and insulating mineral oil

6.1.3 PAHs, Concentration Limit and Labelling

7 Safety and environmental impact of oil treatments

7.1 Hazards associated with oil handling and processing

7.1.1 Hazard to people

7.1.2 Environmental hazards

7.1.3 Hazards to the equipment

7.1.4 Operatioal hazards

8 Guidance for developing method statements for oil handling and processing

8.1 Draining

8.2 Vacuum treatment

8.3 Filling

8.4 Circulating oil

8.5 Topping up equipment

9 Oil Reconditioning/reclamation

9.1 Oil Reconditioning

9.2 Guidelines for filling transformers

9.3 Guidelines for on site oil degassing and dehydratation

9.3.1 Transformer Oil Dehydratation

9.4 Reclamation for transformer oils

9.4.1 Reclamation processes

9.4.2 Sorbent materials

9.4.3 Other Adsorbents and reclamation processes

9.5 Oil reclamation Scenarios

9.5.1 On-site on-line

9.5.2 On-site off-line

9.5.3 Tank to tank

9.5.4 Large scale reclaiming

9.6 When to reclami oil

9.7 Which oils are reclamabile

9.8 Requirements of reclaimed oil

10 Oil dehalogenation

10.1 Chemical-physical treatments of PCBs

10.1.2 Decontamination by metallic sodium

10.1.3 Dehalogenation processes using polyethyleneglycol nd potassium hydroxide (KPEG)

10.1.4 Dehalogenation in closed circuit

10.2 Refilling

11 Management of the oil

12 Selection of the “Best Available Techniques (BAT)” and “Best Environmental Practice (BEP)”

13 Bibliography”.

Inviato Lunedì, 19 luglio 2010 ore 09:07 da stelnet

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