NON DBDS Archives - Sea Marconi https://seamarconi.com/it/tag/non-dbds/ Soluções sustentáveis para a gestão do ciclo de vida (LCM) de transformadores com óleos isolantes Mon, 12 Aug 2024 12:25:49 +0000 pt-PT hourly 1 https://wordpress.org/?v=7.1 Treatment Technologies for Transformers’ Corrosive Sulphur – A great saudi workshop by GCC Lab and Sea Marconi https://seamarconi.com/pt/newsblog/treatment-technologies-for-transformers-corrosive-sulphur-a-great-saudi-workshop-by-gcc-lab-and-sea-marconi/ Fri, 30 Sep 2022 13:42:05 +0000 https://seamarconi.com/it/?post_type=newsblog&p=115753 We are very honored to have participated in the workshop “Treatment Technologies for Transformers’ Corrosive Sulphur” organized by our saudi partner GCC Lab in Damman (Saudi Arabia) the 26 and 27 Sept. 2022.  The event was attended by 50 engineers/technicians from different clients of GCC Lab and was focused on Asset Integrity Management. Sea Marconi attended the event with 4 very high profile speakers: Cristina Tumiatti (Global Business Development Director),

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]]> We are very honored to have participated in the workshop “Treatment Technologies for Transformers’ Corrosive Sulphur” organized by our saudi partner GCC Lab in Damman (Saudi Arabia) the 26 and 27 Sept. 2022.  The event was attended by 50 engineers/technicians from different clients of GCC Lab and was focused on Asset Integrity Management.

Sea Marconi attended the event with 4 very high profile speakers: Cristina Tumiatti (Global Business Development Director), Riccardo Actis (Chief Operation Manager), Riccardo Maina (laboratory manager), Simone Maina (project manager) confirming its international leadership on the corrosive sulfur issue in oils and electrical transformers.

The post Treatment Technologies for Transformers’ Corrosive Sulphur – A great saudi workshop by GCC Lab and Sea Marconi appeared first on Sea Marconi.

]]> Removal of PCBs and non-DBDS corrosive sulfur (C2) France 2013 https://seamarconi.com/pt/portfolio_item/removal-of-pcbs-and-non-dbds-corrosive-sulfur-c2-france-2013-pt/ Fri, 31 May 2013 14:50:34 +0000 http://www.bioenpro.com/wordpress01/?post_type=portfolio&p=4206 The post Removal of PCBs and non-DBDS corrosive sulfur (C2) <strong>France 2013</strong> appeared first on Sea Marconi.

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Scenario

Nameplate data of transformer:

Transformer: grid transformer
Manufact: xxx
Year: 1957
Power [MVA]: 50
Voltage [KV]: 225
Oil Mass [Kg]: 38.000
Oil type: blended mineral oil

Trasformatore affetto da PCB e presenza di composti corrosivi solforati

Solution

Selective depolarization treatment (Chedcos) in order to remove corrosive sulfur compounds and dehalogenation treatment (CDP Process®) in order to remove the PCBs from oil and transformer. The treatment was performerd on-site and on-load (transformer in operation and fully load during the treatment).

Before the treatments

After the treatments Sea Marconi
PCB* [mg/Kg] 81 20
Total sulfur [mg/Kg] 21,600 20,500
TCS (total corrosive sulfur)
as DBDS Eq. [mg/Kg]		 140 < 10
CCD Corrosive NOT Corrosive
DBTP [mg/Kg] 380 280
TAN [mg KOH/g] 0,096 < 0,03
IFT 19,5 26
Color 6,9 3

*The agreed guarantee was PCBs < 40 [mg/Kg]

The post Removal of PCBs and non-DBDS corrosive sulfur (C2) <strong>France 2013</strong> appeared first on Sea Marconi.

]]> Removal of PCBs and non-DBDS corrosive sulfur (C2) France 2012 https://seamarconi.com/pt/portfolio_item/removal-of-pcbs-and-non-dbds-corrosive-sulfur-c2-france-2012-pt/ Fri, 31 May 2013 14:50:06 +0000 http://www.bioenpro.com/wordpress01/?post_type=portfolio&p=4205 The post Removal of PCBs and non-DBDS corrosive sulfur (C2) <strong>France 2012</strong> appeared first on Sea Marconi.

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Scenario

Hydro power plant with 3 GSU transformers

Nameplate data of the transformer:

Manufact: xxx
Year: 1965
Power [MVA]: 80
Voltage [KV]: 220
Oil mass [Kg]: 35.000
Oil type: naphthenic blended

Solution

Selective deplarization treatment (Chedcos) in order to remove the corrosive sulfur compounds and dehalogenation treatments (CDP Process®) in order to remove the PCBs from the oil and the transformers. the tratments were performed on-site and on-load (transformer in service and fully load during the treatment).

Before the treatment

After the treatment
PCB* [mg/Kg] 96 26
TCS (total corrosive sulfur) DBDS Eq. [mg/Kg] 64 < 10
CCD Corrosivw NOT Corrosive
DBTP [mg/Kg] 16 14
TAN [mg KOH/g] 0,194 0
TgD 0,03737 0,05144

*The agreed guarantee was PCBs < 50 [mg/Kg]

The post Removal of PCBs and non-DBDS corrosive sulfur (C2) <strong>France 2012</strong> appeared first on Sea Marconi.

]]> Removal of PCBs and non-DBDS corrosive sulfur (C2) France 2010 https://seamarconi.com/pt/portfolio_item/removal-of-pcbs-and-non-dbds-corrosive-sulfur-c2-france-2010-pt/ Fri, 31 May 2013 14:49:40 +0000 http://www.bioenpro.com/wordpress01/?post_type=portfolio&p=4204 The post Removal of PCBs and non-DBDS corrosive sulfur (C2) <strong>France 2010</strong> appeared first on Sea Marconi.

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Scenario

Steel Factory: 8 Equipment

Nameplate data of the transformers:

Namufact: xxx
Year: 1973
Power [MVA]: 85
Voltage [KV]: 63
Oil mass [Kg]: 18.150
Oil type: naphthenic blended

Fingerprint dell’olio. Si evidenzia la presenza di composti solforati responsabili della corrosività dell’olio

Solution

Selective depolarization treatment (Chedcos) in order to remove the corrosive sulfur compounds and dehalogenation treatments (CDP Process®) in order to remove the PCBs from the oils and transformers. the treatments were carried out on-site and on-load (transformer in service and fully load during the treatments).

Before the treatment

After the treatment
PCB* [mg/Kg] 151 17
TCS DBDS Eq. [mg/Kg] 172 < 10
CCD Corrosive NOT Corrosive
Cu 32 5,18
TAN [mg KOH/g] 0,131 0,01
Color 6.5 2

*The agreed guarantee was PCB < 50 [mg/Kg]

The post Removal of PCBs and non-DBDS corrosive sulfur (C2) <strong>France 2010</strong> appeared first on Sea Marconi.

]]> Francia 2012 Rimozione zolfo corrosivo senza DBDS (C2) https://seamarconi.com/pt/portfolio_item/removal-of-pcbs-and-non-dbds-corrosive-sulfur-c2-france-2012-pt-2/ Fri, 31 May 2013 14:49:10 +0000 http://www.bioenpro.com/wordpress01/?post_type=portfolio&p=4203 The post <strong>Francia 2012</strong> Rimozione zolfo corrosivo senza DBDS (C2) appeared first on Sea Marconi.

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Scenario

Il classico trattamento con terre follari si dimostra totalmente inefficace contro lo zolfo corrosivo

Caratteristiche tecniche del trasformatore:

Costruttore: xxx
Anno: 1969
Potenza [MVA]: 14
Tensione [KV]: 63
Massa olio [Kg]: 4.200
Tipo di olio: Esso Univol 54

Fingerprint dell’olio. Presenza di composti solforati NON DBDS
Il trattamento con terre follari (NON da Sea Marconi) non ha prodotto alcun risultato contro lo zolfo corrosivo
Dopo il trattamento con terre follari si evidenziano ancora segni di corrosività

Soluzione

Trattamento di depolarizzazione selettiva (Chedcos) per la rimozione dei composti solforati (NON DBDS) responsabili della corrosione.

The Selective depolarisation treatment proves effective against corrosion unlike that with fuller earths

Prima dei trattamenti

Dopo il trattamento con terre follari

Dopo il trattamento di depolarizzazione selettiva Sea Marconi
Colore 4 3.7 1
TCS DBDS Eq. [mg/Kg] 55 51 < 10
CCD Corrosivo Corrosivo NON Corrosivo
DBTP [mg/Kg] – 50 45
TAN [mg KOH/g] 0,25 0,035 0,01
DF – 0,01879 0,012
IFT [mN/m] – 25,3 41

The post <strong>Francia 2012</strong> Rimozione zolfo corrosivo senza DBDS (C2) appeared first on Sea Marconi.

]]> Remoção de enxofre corrosivo não-DBDS (C2) – Itália 2011 https://seamarconi.com/pt/portfolio_item/remocao-de-enxofre-corrosivo-nao-dbds-c2-italia-2011/ Fri, 31 May 2013 14:48:50 +0000 http://www.bioenpro.com/wordpress01/?post_type=portfolio&p=4202 The post Remoção de enxofre corrosivo não-DBDS (C2) – Itália 2011 appeared first on Sea Marconi.

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Cenário

Central térmica com 8 transformadores elevadores

Características técnicas dos transformadores :

Fabricante: xxx
Potência [MVA]: 370
Tensão [KV]: 400
Massa de óleo [Kg]: 58.000
Tipo de óleo: óleo blendado

As análises e diagnósticos de 2011 destacaram:

Enxofre total = 5700 mg/Kg
TCS (Total Corrosive Sulfur) = 104 mg/Kg (equivalente a DBDS)
Teste CCD = corrosivo
DBTP (dibenzotiofeno) = 42 mg/Kg

Passo 2

Agosto de 2011: Avaria com explosão e incêndio

Fingerprint dell’olio. Composti corrosivi dello zolfo

Solução

Diagnóstico, prognóstico com recomendação de realizar o tratamento de despolarização seletiva (Chedcos) para a remoção dos compostos sulfurados (NÃO DBDS) responsáveis pela corrosão.

The post Remoção de enxofre corrosivo não-DBDS (C2) – Itália 2011 appeared first on Sea Marconi.

]]> Remoção de enxofre corrosivo não-DBDS (C2) – Oriente Médio 2009 https://seamarconi.com/pt/portfolio_item/remocao-de-enxofre-corrosivo-nao-dbds-c2-oriente-medio-2009/ Fri, 31 May 2013 14:48:20 +0000 http://www.bioenpro.com/wordpress01/?post_type=portfolio&p=4201 The post Remoção de enxofre corrosivo não-DBDS (C2) – Oriente Médio 2009 appeared first on Sea Marconi.

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Scenario

Thermal power plant with 8 GSU transformers

Nameplate data of the transformers:

Power [MVA]: 175
Voltage [KV]: 400
Oil type: naphthenic oil

C2 – Corrosione NON legata a DBDS

Step 1

The diagnosis in the 2009 showed:

Total sulfur = 200 mg/Kg
TCS (Total Corrosive Sulfur) = 157 mg/Kg (DBDS eq.)
CCD Test = corrosive
IFT = 19 mN/m
DBTP = 38 mg/Kg

Step 2

Failure in the 2013

Step 3

Post failure analysis in progress…

IFED, fingerprint dell’olio

Step 4

Sea Marconi recommended the selective depolarization treatment (Chedcos) in order to remove the sulfur compounds (NOT DBDS) responsable for the corrosion.

The post Remoção de enxofre corrosivo não-DBDS (C2) – Oriente Médio 2009 appeared first on Sea Marconi.

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