Food processing + steam - NSF rated? (PAH)

W Deacon

It's not the boiler so much as 1. Boiler Water Treatment and 2. Filtration at the injection point.
Water treatment specs basically say no more than 10 ppm of any volatile amines in the steam.
Filtration is covered by a 3A spec: Method of Producing Steam of Culinary Quality, Document Number: 3A 609-02 Accepted Practice 3-A Sanitary Standards, which basically says you need a "culinary steam filter". I've used the steel one by RP Adams for years: see http://www.rpadams.com/gasfilters.htm
and Nicholson has a stainless steel version, see:
www.nicholsonsteamtrap.com/Handbook/E10.pdf

Also, be sure the customer is well trained and understands the importance of proper blowdown practices, especially the "once a shift" bottom blowdown. Otherwise, the boiler foams and the best filter in the world won't stop all the "stuff" that comes over.

Dave Yates (PAH)

Cool consultation project

Anyone know of steam boilers rated for making dry steam that can be injected into food processing/mixing. Electric for fuel. Need 20 PSI min with ability to adjust up/dn depending on product being cooked or mixed. Direct injection of steam into food products.

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don_52

better; indirect...

Dave,

better way ( my view ) is indirect steam to steam
generation, this way the system is isolated such that
the process side can use the clients existing, RO, DI,
NSF water source and just regular water on the primary side. ( regular boiler water )

the above post is 100% correct, the indirect steam to
steam method negates these other measures by using the
existing source of "specification water" that the client
"must have" in the first place.

while some additive may/must be used on the secondary
side,it becomes somewhat easier since the water is already "polished".


i've worked with this stuff in food, pharma and biotech.

here's some light reading for the weekend.

http://www.electrosteam.com/index.htm

aquachem ( cleaverbrooks ) has a division that makes
"ultrapure steam stills", may be worth talking to them
for general info.

regards, don

Richard_4

Process steam boiler

Columbia boiler, pottsville P.A. .... They make boilers for food and brewery industry...They are very helpfull and have been around for a long time...WHY super heated dry steam?? ...Worked around food processing for many years, interested in this project...Keep us posted. thanks,