Chemical Engineering May 2022 - 37

Many problems with condensate
systems are caused by not handling
the flash steam properly through a
separate flash vessel, and the vent
steam from that vessel contains
value
that
should
be
recovered
where economically feasible. Ref.
4 provides additional information
regarding electric and non-electric
condensate-pumping systems. ■
Edited by Mary Page Bailey
FIGURE 18. A vent condenser captures valuable
treated water and some heat that would otherwise
be vented out
The equipment to recover the
CIC-10307 halfp page ad.qxd 3/25/07 6:19 PM Page 1
treated water and much of the energy
is a vent condenser (Figure 18).
These condensers use a cool water
stream, such as boiler makeup or
process water (if available), to pull
energy from the flash steam while
condensing it to a recoverable hightemperature
liquid. The result can
reduce boiler load, capture valuable
treated condensate, and also preheat
a water stream where useful to
elevate its temperature.
References
1. Risko, J. R., Handle Steam More Intelligently, Chem. Eng., pp.
44-49, November 2006.
2. Risko, J. R., Stop Knocking Your Condensate Return!, Chem. Eng.
Prog., 112 (11), pp. 27-34, November 2016.
3. TLV Co. Ltd., Cavitation in Condensate Pumps, Kakogawa, Japan.
4. Risko, J. R., Comparing Condensate Return Pumping Options,
Webinar, TLV Corp., Charlotte, N.C.; www.tlv.com/global/US/
webinars/comparing-condensate-return-pumps.html.
5. TLV Co. Ltd., Returning Condensate and When to Use Condensate
Pumps: Electrically-powered Centrifugal or Turbine Condensate
Pumps, Kakogawa, Japan.
6. TLV Co. Ltd., Saturated Steam by Temperature: Engineering Calculator,
Kakogawa, Japan.
7. Mohr, A. J., Pearson, J., Increase Energy Savings Through Condensate
and Flash Steam Recovery, Webinar, TLV Corp., Charlotte,
N.C., www.tlv.com/global/US/webinars/increase-energysavings-through-condensate-flash-steam-recovery.html.
8.
Fluid Controls Institute, FCI Secondary Pressure Drainer Tech
Sheet #SPD 205: Minimum Vented Receiver Sizing for Type
I SPD & Electric Pumps, Table 1 notes, Cleveland, Ohio,
November 2019.
9. Fluid Controls Institute, FCI Secondary Pressure Drainer Tech
Sheet #SPD 201: What is a Secondary Pressure Drainer?,
Cleveland, Ohio, December 2020.
10. ANSI/FCI S18-1-2021 Secondary Pressure Drainer Standard:
Sizing and Selection of Type I Secondary Pressure Drainers,
Fluid Controls Institute., Cleveland, Ohio, 2021.
11. ANSI/FCI S18-2-2020 Secondary Pressure Drainer Standard:
Standard for Installation of Type 1 Secondary Pressure Drainers,
Fluid Controls Institute., Cleveland, Ohio, 2020.
Acknowledgement
Special thanks to Norm White, Jon
Walter and Andrew Mohr for their
kind review and comments.
Author
James R. Risko is the president
of TLV Corp. (13,901 South Lakes
Dr., Charlotte, N.C. 29873; Phone:
704-597-9070; Email:
tlvengineering.com).,
risko@
responsible
for U.S. and Canadian operations.
He has 45 years of experience
with steam systems, authored
more than 60 technical articles,
provided webinars to over 2,500
attendees globally and presented papers for the Distillation
Experts Conclave, Fractionation Research Inc., RefComm,
eChemExpo, AIChE, Kister Distillation Symposium,
the Ethylene Conference, AFPM and many more.
He co-invented the world's first combination pump/
traps and created the " Extended Stall Chart " for draining
stalled heat exchangers. He is a former chairman of the
Fluid Controls Institute (FCI) and remains active in developing
standards for both FCI and ANSI.
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37

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Chemical Engineering May 2022

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