Condensate recovery by mechanical pumps
Using mechanical condensate pumps is considered efficient for recovering condensate, as opposed to centrifugal or electric condensate pumps, which have many issues. Steam-operated mechanical condensate pump systems eliminate the requirement of intermediate collection/storage tanks, level control systems, and standby centrifugal pumps, making the recovery system compact and easier to implement.
Condensate and flash steam recovery using a flash jet pump
Condensate and flash recovery using a steam operated pressure powered pump and flash vessel
Advantages of recovering condensate by mechanical pumps :
Energy efficiency
- As collection / storage tanks are not required, standing losses, radiation losses and overflow losses are eliminated.
- Condensate is pumped at much higher temperatures.
- Power consumption for running and pumping condensate is eliminated.
- Flash steam is recovered along with condensate.
Higher uptime
- Mechanical pumps can easily handle high temperature condensate. They not only provide higher uptime compared to centrifugal pumps but also require substantially less maintenance.
Lower operating and capital costs
- As collection/storage tanks, level controls and capital costs and standby centrifugal pumps are not required, capital costs are lower.
- Additionally, as steam is used to pump condensate instead of power, and the complete heat is recovered, the operating costs are also lower.
Safety
- Eliminating the venting of flash steam and the accompanying heat and humidity in the surrounding environment, not only makes the working environment more comfortable but also helps prevent corrosion to pipelines, accessories and equipment.
- Additionally, eliminating the venting of flash steam and condensate overflow losses also makes the system safer.
