oversized cleaver brooks steam boiler
oversized cleaver brooks steam boiler
(OP)
I am a part owner of an industrial laundry and have a 150 hp cleaver brooks steam boiler with 6 million btu. We used to have the steam coil system in a presurized hot water tank to make our hot water. I just purchased a ludell direct contact water heater 2.2 million btu which took a lot of stress off of the boiler. The water heater is sized perfect for the usage but now the boiler is oversized. The boiler now starts and stops frequently during the process. Without purchasing a smaller boiler, what are my options?





RE: oversized cleaver brooks steam boiler
RE: oversized cleaver brooks steam boiler
Yes, frequent thermal cycling of a boiler is not too good; although CB boilers are very good. Boiler life is strongly dependent upon the water quality and how well you maintain the operating & safety equipment.
That aside, some options are: 1) expand the use of the boiler and sell excess heat to neighboring businesses (can be risky, costly to maintain and install), 2) while a smaller burner is practical, modifications to the blower wheel & likely the motor will be needed, 3) sell the boiler to obtain a smaller boiler, 4) expand the laundry business, etc. Any choice that is made will end up costing you some money.
Good luck!
-pmover
RE: oversized cleaver brooks steam boiler
150 HP sounds like a whole lot for a laundry.
rmw
RE: oversized cleaver brooks steam boiler
RE: oversized cleaver brooks steam boiler
DO NOT reduce the low fire settings as doing so will over heat the burner and drastically reduce the life of the burner. If you are sure you want to change your CB boiler from a 50-150 hp boiler to lets say a 25 -75 hp boiler which would probably not cycle very much, then contact a professional burner/boiler service technician. If you want to do it yourself and I don't advise it, email me and I'll tell you how.
RE: oversized cleaver brooks steam boiler
Or, install a storage tank, heat all your water for x hours, then only fire up when it's been used.
RE: oversized cleaver brooks steam boiler
I was running between 92 psi and 105 psi. We also changed that to run between 80 psi and 105 psi as the change did not affect my production. Now when the boiler starts at 80 psi it is on low fire, after 25 seconds it adjusts to high fire then hits 90 psi and goes back to low fire until it hits 105 psi and stops. It is running better than before and is not cycling as much when my production is in full demand. It still cylcles at the end of the day when some of the steam dryers are not being used. I think that in the future my best option would be to downsize my boiler.
The combustion test is attatched
Thanks again for the help
Pete
RE: oversized cleaver brooks steam boiler
RE: oversized cleaver brooks steam boiler
a very efficient 80-100 hp
below that is not economic as spend gas and also may create condensation.