Case Study Node Image
During an energy audit at a Canadian pulp and paper plant, AESSEAL® identified 15 packed evaporator area pumps that needed upgrading to mechanical seals. This was due to the packing flush water diluting the black liquor which was already trying to remove the excess water to enable its use as fuel for their recovery boiler.
Product Types
Cartridge Mechanical Seals
Accessible Text
Counterproductive flush water in 15 evaporator pumps
leads to big savings
During an energy audit at a Canadian pulp and paper plant, AESSEAL®
identified 15 packed evaporator area pumps that needed upgrading
to mechanical seals. This was due to the packing flush water diluting
the black liquor in a process designed to remove excess water and
concentrate the liquor so it can be used as fuel in their recovery boiler.
As a result of the excess water due to the use of packing, frequent maintenance and pump
replacements were required and because of this, the recovery boiler efficiency was negatively
impacted. As the mill was evaporator limited, reduced through-put and efficiency on the
recovery boiler resulted in reduced pulp production rates.
AESSEAL® recommended the use of the FIDC™ dual seal and 25L water management
systems as these require little or no regular maintenance or adjustments for up to 5 years or
more and is perfect for these relatively easy low pressure applications.
With the implementation of these seals and systems from packing, virtually all of the dilution
water was eliminated. At the time of the audit and recommendations, it was predicted there
would be a 2 month ROI, and $689,191 CAD (US$549,733) of annual savings. Four years later,
there has been a saving $2,756,763 CAD (US$2,198,932 / €1,963,866) which includes the
evaporation and maintenance savings.
In addition, as a result of the new systems in places, the AES water management systems are
conservatively saving 26.5 million gallons (120 million litres) of water per year.
aesseal.com/info
‘Huge money and water savings’
Industry: Pulp & Paper
Product: FIDC™ & Water Management Systems
Application: Evaporator Pump
Water savings: 26.5 million gallons each year
Savings: $2,756,763 CAD (US$2,198,932)
Reference N.O: CS0026
leads to big savings
During an energy audit at a Canadian pulp and paper plant, AESSEAL®
identified 15 packed evaporator area pumps that needed upgrading
to mechanical seals. This was due to the packing flush water diluting
the black liquor in a process designed to remove excess water and
concentrate the liquor so it can be used as fuel in their recovery boiler.
As a result of the excess water due to the use of packing, frequent maintenance and pump
replacements were required and because of this, the recovery boiler efficiency was negatively
impacted. As the mill was evaporator limited, reduced through-put and efficiency on the
recovery boiler resulted in reduced pulp production rates.
AESSEAL® recommended the use of the FIDC™ dual seal and 25L water management
systems as these require little or no regular maintenance or adjustments for up to 5 years or
more and is perfect for these relatively easy low pressure applications.
With the implementation of these seals and systems from packing, virtually all of the dilution
water was eliminated. At the time of the audit and recommendations, it was predicted there
would be a 2 month ROI, and $689,191 CAD (US$549,733) of annual savings. Four years later,
there has been a saving $2,756,763 CAD (US$2,198,932 / €1,963,866) which includes the
evaporation and maintenance savings.
In addition, as a result of the new systems in places, the AES water management systems are
conservatively saving 26.5 million gallons (120 million litres) of water per year.
aesseal.com/info
‘Huge money and water savings’
Industry: Pulp & Paper
Product: FIDC™ & Water Management Systems
Application: Evaporator Pump
Water savings: 26.5 million gallons each year
Savings: $2,756,763 CAD (US$2,198,932)
Reference N.O: CS0026
Case Ref
CS0026
Country
Canada
Inudstry
Pulp and Paper