We're Hiring! See All Open Jobs! 510-784-0110Contact Us Home Commercial Industrial Inventory/Rental Service/Parts Training/Resources Contact/About December 30, 2020 R.F. MacDonald Co. has patented a process for direct injection of urea in flue gas streams on boilers; urea is regarded as the safest reagent for use in the SCR process On Tuesday, Nov. 24, 2020 the U.S. Patent and Trademark Office issued the safest and simplest NOx-reduction process patent for packaged boilers. The patent was granted to R.F. MacDonald Co. for inventing a “process for direct urea injection with selective catalytic reduction (SCR) for NOx reduction in hot gas streams and related systems and assemblies.” SCR requires the use and storage of ammonia-based reagents, which range from high risk to low risk. The R.F. MacDonald Co. patent specifies urea, which is the lowest risk ammonia-based reagent. The only health hazard associated with urea is “possible irritation” as indicated by the Hazardous Materials Identification System (HMIS). The urea solution is identical to Diesel Exhaust Fluid (DEF), which is sold worldwide in automotive retail stores for use in diesel motor vehicles. As shown in the graphic below, urea is injected at each Injection Point into the boiler. As NOx and urea pass through the NOx Reduction Catalyst, NOx is separated into two non-harmful elements Nitrogen (N2) and water (H2O). There are three types of ammonia-based reagents: anhydrous, aqueous and urea. Both anhydrous and aqueous ammonia carry higher risk and regulatory issues compared to urea as shown in the chart below. R.F. MacDonald Co. provides SCR installation and service for each type of ammonia-based reagent. However, direct urea injection with SCR is recommended for institutions housing people, such as hospitals and universities, because urea is classified as non-hazardous. Hospitals use boilers to produce steam for sanitation and universities use boilers to produce hot water for amenities. As restrictions on NOx emissions and air pollutants increase, industrial and institutional facilities are investing in SCR technology for their boiler systems because SCR has been proven to reach the lowest NOx emissions levels while maintaining boiler efficiency. R.F. MacDonald Co.’s newly patented SCR technology complies with every emissions limit in California, including the strictest district in the nation: The San Joaquin Valley Air Pollution Control District. California has 35 local air districts responsible for regional air quality, planning, monitoring and facility permitting. Visit the California Air Resources Board for more information. Examples of California Air Districts by RFMCO Office Location Bay Area Air Quality Management District (BAAQMD) https://www.baaqmd.gov/rules-and-compliance/current-rules Sacramento Metropolitan Air Quality Management District (SacMetro AQMD) http://www.airquality.org/Businesses/Rules-Regulations San Diego Air Pollution Control District (SDAPCD) https://www.sdapcd.org/content/sdc/apcd/en/Rule_Development/Rules_and_Regulations.html San Joaquin Valley Air Pollution Control District (SJVAPCD) https://www.valleyair.org/rules/1ruleslist.htm Southern California Air Quality Management District (SCAQMD) http://www.aqmd.gov/home/rules-compliance/rules/scaqmd-rule-book/regulation-xi R.F. MacDonald Co.’s history with low NOx began in the late 1970s after the California Air Resources Board (CARB) began mandating new low NOx rules and compliance deadlines. At that time, R.F. MacDonald Co. poised itself to be the low NOx solutions provider in California and began retrofitting and installing flue gas recirculation and ultra-low NOx burners. Since 2006, R.F. MacDonald Co. has installed multiple SCR systems each year for the various industries within California and Nevada, including hospitals, universities, manufacturing facilities, power plants, food processors and more. Loma Linda University Health achieves sub 5 PPM NOx using Direct Urea Injection with SCR. Selection of the appropriate emissions control system requires a detailed evaluation of environmental, technical, safety and economic factors. Solutions currently available to meet emissions regulations include burner installation, burner retrofit and SCR installation. Contact us to help guide you through the process or learn more about SCR packaged systems here. PDF: Patent Issued to R.F. MacDonald Co. for Safest NOx Emissions Reduction Technology with SCR Contact AJ Feliz Director of Engineering P: 714-257-0900 E: anthony.feliz@rfmacdonald.com W: rfmacdonald.com/contact U.S. Patent Details Publication No.: US 2018/02588814 A1 Patent No.: US 10,844,763 B2 Applicant: R.F. MacDonald Co., Modesto, CA Issued and Approved: Nov. 24, 2020 PDF: Patent Abstract Categories: Boiler Regulations, Boiler Safety, Boilers, Case Study, Instrumentation & Controls, Low NOx, SCR | Tags: APCD, AQMD, BAAQMD, SacMetroAQMD, SCAQMD, SDAPCD, SJVAPCD Post navigation ← We are the Standard Xchange Distributor for CA & NV Boerger Mobile Trailer Tour for Northern CA Wineries → R.F. MacDonald Co. Receives Patent for SCR with Urea Notable Low NOx Experience Firetube Boiler Applications • Integrate structural support within boiler • Top or horizontal flow designs • Provide reliable NOx performance in all sizes Industrial Watertube Applications • SCR for any size and configuration • Vertical or horizontal orientations • New or retrofit applications • Optimize boiler performance Turbine Applications • Co-Generation or simple cycle • Deliver reliable (less than) 2.5 PPM NOx SCR Brochure LAC/USC Medical Center Uses Patented SCR with Urea Brochures & Line Cards 60th Anniversary Company History Boiler Equipment Maintenance Plans Boiler Line Card Boiler Service Brochure Commercial Line Card Fabrication Brochure Industrial Pump Line Card Mobile Boiler Rooms Flyer Parts Line Card (Northern CA) Parts Line Card (Southern CA) Pump & Rotating Equipment Service Brochure Rental Brochure SCR Low NOx Solutions & Support Brochure SJVAPCD Clear the Air Brochure Wine Industry Capabilities Brochure ABOUT US R.F. MacDonald Co. has been in business since 1956. We service and sell boilers, pumps and accessories for commercial and industrial applications. Our employees are full-time mechanical engineers, sales engineers, parts experts and field service personnel. Allow us to assist you in your equipment selections, installation planning, layout, permitting and project supervision. General Engineering Contractor A-1 CA: C-4 | NV: C-1 Contractor License CA: #220117 | NV: #0042816 SITE MAP Home Boilers Pumps Fabrication Boiler Rental Service Parts Boiler Training Case Studies Videos About Us Careers Contact RECENT POSTS WIN Expo Visitors Receive 10% Off Their Next Order RFMCO Pre-Owned, Reconditioned Boilers SJVAPCD Rules 4306 & 4320 SCR Technology Solution CONTACT INFO 25920 Eden Landing Rd. Hayward, California 94545 Phone:510-784-0110 Website:https://rfmacdonald.com SF Bay Area | Sonoma/Napa LA & OC Area | San Diego Modesto | Sacramento Fresno | Bakersfield Reno | Las Vegas © 2021 R.F. 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