2011+boilers

2011+boilers - Boilers 1 Safety Concerns Boiler systems are...

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1 Boilers
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2 Safety Concerns Boiler systems are large. They contain as much water as steam and are therefore heavy. Compact and efficient systems require pressures need to be very high. In the early days, boiler explosions were frequent. – Needed standards for pressure vessels and welds – Primary driving forces for the formation of the ASME Maintenance of the ASME Pressure Vessel Code still big $$ National Board of Boiler and Pressure Vessel Inspectors was created in 1919 to promote greater safety to life and property
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3 Codes and Standards for Boilers The boiler's must have an ASME stamp. (S for power boilers, U for pressure vessels, R for repair) The insurance company may dictate additional requirements. For all new boilers with inputs over 10 MMBtu/hr, Federal emission standards apply, including permitting and reporting procedures A full-time boiler operator may be required. – NJ and Chicago Most states require an annual boiler inspection
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EPA is developing new Boiler Rules The boiler MACT proposal was signed by the EPA Administrator on April 29, 2010. The boiler MACT and boiler area source final rules were signed by the EPA Administrator on February 21, 2011 Original rule was made in 2004 and tossed out by courts for being too vague Before then, rules had been risked based Iowa not equal to NJ BACT = Best Available Control Technology 4
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EPA is developing new Boiler Rules MACT versus BACT – Maximum achievable control technology Existing plants must upgrade to as good as the best 12% New plants need best performance – Considers economics BACT – Best Available Control Technology Regional in rules Applies only to new sources Often no economic considerations “ScoNox” 5
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Two flavors: Boiler MACT 6 On May 16, 2011 , the Environmental Protection Agency again changed course with the Boiler MACT rules, issuing an indefinite stay. The effective dates of the final rules published in the Federal Register on March 21, 2011 (76 FR 15608 and 76 FR 15704), are delayed until such time as judicial review is no longer pending or until the EPA completes its reconsideration of the rules, whichever is earlier.
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Two flavors: Utility MACT Daily calls for this to be tabled or studies more! They are after mercury, particulates, acid gas – so only focus on coal and oil If implemented, would seriously reduce coal fired capacity in the US 7
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A boiler is nothing more than a heat transfer vessel. Heating surface is expressed in square feet and may be defined as: Radiant Heating Surfaces — (also called direct or primary) including all water-backed surfaces that are directly exposed to the radiant heat of the combustion flame. Convected Heating Surfaces — (also called
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2011+boilers - Boilers 1 Safety Concerns Boiler systems are...

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