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Thanks metengr, I misstated our specification, should have been: For carbon steel piping that conveys single-phase water at 200-500 deg F a minimum Chromium Equivalent (CReq) (where CReq = Cr + 0.19Mo + 0.4Cu) shall be provided. The minimum value of CReq shall be equal to 0.16 %. Weld filler...

To prevent flow accelerated corrosion in HRSGs, we specify HRSG suppliers provide A106 grade B with a minimum chrome content of 0.016%. Several of the suppliers provide P11 with a chrome content over 1.0%. When the HRSG is chemically cleaned during startup, the waste is categorized as...

I am looking for treatment alternatives for the blowdown stream (8,000 ppm Chlorides) from a typical coal plant FGD system. Discharge offsite is not an option. We are currently considering an evaporator, using the concentrated waste stream to stabilize the byproduct storage area (ash). Any...

We are currently designing an ESP system for a 400 MW forced draft boiler and a 200 MW balanced draft boiler, both oil-fired. NFPA 850 requires a fire detection system consisting of temperature sensors at the inlet and outlet ducts that alarm to the control room. The operator is then required...

Jayboz, I am looking for information on the same subject, but for an oil-fired boiler (2.5% sulfur). See my thread July 24, 2003 in this forum. We are investigating alkaline injection alternatives to control opacity and backend corrosion caused by the conversion of SO3 to H2SO4. I have...

I am looking for information/experience utilizing alkaline injection (MgO, NaHSO3, etc) in an oil-fired utility boiler to reduce SO3 emissions. Due to stricter emission standards, we are planning to reduce opacity and particulate emissions utilizing dry ESP's in combination with alkaline...

Thanks to all for the comments...we have a meeting with the state agency next week to plead our case, so to speak. Our contingency plans include both a "frac" tank to collect the water and carry it offsite as well as an ion exchanger to recirc the water back into the demin storage...

Our general construction permit, while allowing us to drain storm water, specifically prohibits draining "processed water" and according to the state agency, as soon as the city water passes through the demineralizer trailers, it becomes processed water.

VisionaryScott...this is the kind of experience I am looking for to build our case. We are not yet an operating plant and need the demin water for flushing piping during construction. We plan to initially flush the systems with potable water and complete the flush with demin quality water. We...

Does anyone have any experience with draining demineralized water to the ground? We are trying to dispose of demineralized water which would NOT be released into any "waters of the state," however, the state environmental department is dragging their feet on giving us concurrence...