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Boiler Layup

Boiler Layup
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Boiler LayupMarket Application Publication Background: Boiler cycling (i.e. startup and shutdown) is more common in today's challenging business environment, primarily due to instability of natural gas prices and volatile energy demand. As cycling increases, proper layup of your Heat Recovery Steam Generator (HRSG) becomes much more critical. Problems associated with improper boiler layup include corrosion and pitting on both the gas & water sides of the HRSG, maintenance issues, startup delays and water chemistry delays. Nitrogen is an essential tool in helping to alleviate these issues, and has become the preferred technology since it doesn't introduce foreign chemicals to the boiler. A nitrogen generator, which separates nitrogen and oxygen from a compressed air supply, can often be the most cost effective way to supply this nitrogen. Features and Benefits: • Price of our nitrogen is constant. Supplier Nitrogen is subject to pricing increases, rental agreements, hazmat fees, delivery surcharges, local & state taxes, etc. A nitrogen generator offers long term price stability. • Your cost increases relative to usage with bulk, dewar or cylinder nitrogen. Costs decrease as usage increases with a nitrogen generator. • Nitrogen has a very low boiling point, and is continuously evaporating when supplied as liquid in bulk or dewars. It can cost thousands of dollars if these gases are not recaptured. • A nitrogen generator eliminates the contracts required from bulk gas suppliers. No more automatic renewals, automatic increases or 1 -year written notice for contract termination. • Ease of installation. Pipe in compressed air and pipe out Nitrogen. Contrast this with the installation requirements for a bulk tank, including a concrete pad, fence and significant square footage. • Complete start up and testing procedure at the factory prior to delivery. • Very little maintenance or monitoring required once system is up and running. Simple and straightforward operation. • Proven technology with numerous references available. Over 10,000 successful generator installations. ENGINEERING SUCCESS

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Application: A nitrogen blanket can be used in both the wet & dry layup of a HRSG. During wet layup, which is typically used for outages lasting <30 days, nitrogen is used to purge and blanket the steam spaces, often including the superheaters and reheaters. To minimize the amount of nitrogen required, it is best to inject it when drum pressure is between 2-5 psig. During dry layup, which is typically used for outages lasting > 30 days or shorter outages where freezing could occur, it is extremely important to thoroughly drain the unit and completely dry all surfaces. This helps to prevent...

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Flow Rates (SCFH) Model Number Feed Pressure Temperature Ambient Pressure Maximum Pressure Temperature Range Dewpoint Residual Oil Content Particles Atmospheric Dewpoint Commercially Sterile Particles >.1 micron Suspended Liquids None Recommended Inlet Pressure (Min.) 110 psig (7.6 barg) Max Inlet Pressure 140 psig (9.7 barg) Max Outlet Pressure (Based on nominal conditions 80 psig and standard 60 gallon nitrogen tank) Min. / Max. Ambient Temperature Dimensions Weight (with tank) Inlet/Outlet Electrical Requirement DB-15, DB-20 110 psig 80°F 1 Atm. 140 PSIG 60°F - 105°F 40°F atmospheric...

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HFX Series Flow Rates and Pressure Correction Flow Rates (SCFH) @ 100 psig @ 68°F Model 95 96 97 98 99 Pressure Correction Factors (at Indicated Operating Pressure (PSIG) 58 73 Principal Specifications - HFX Series Membrane Nitrogen Generators Model Number Atmospheric Dewpoint Commercially Sterile Particles > 0.01 micron Suspended Liquids Min/Max Operating Press.(1) Max. Press. Drop (at 95% N2, 125 psig) Recommended Ambient Operating Temperature Min/Max Inlet Air Temp. Recommended Inlet Air Temperature Electrical Requirements (2) Dimensions Shipping Wt. Notes: 1 Maximum operating pressure...

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