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Low-NOx Emission Burners for Industrial Boilers

Date: 07-11-2017 Author: ailsa from ZG boiler

Operators of industrial-size centralized hot-water- and steam-generating facilities on college, hospital, and government campuses are under increasing pressure to restrict nitrogen-oxide (NOx) emissions, as state environmental agencies enforce federal law intended to decrease respiratory-related health concerns. The focus of this article is on reducing NOx formation at the burner.

There are three major types of combustion-related NOx: thermal, fuel bound, and prompt.

Thermal. Thermal NOx is created by high flame temperature in the presence of oxygen. The key to limiting thermal NOx is to reduce peak flame temperature and restrict oxygen availability and exposure at peak temperature. There are two main ways burner manufacturers have accomplished this without post-combustion control: steam injection and flue-gas recirculation (FGR).

Low-NOx Emission Burners for Industrial Boilers.jpg

Steam injection—injecting steam into a flame—works because steam temperature is considerably lower than flame temperature—in the case of a boiler operating at 300 psig, 421°F vs. 2,400°F to 3,400°F. Also, steam is pure water, which is not free oxygen.

FGR is the process by which exhaust gas is introduced into the combustion-air stream prior to a burner. Flue gas also is relatively cool (300°F to 550°F, depending on the design of the boiler and whether there is a feedwater economizer) with respect to flame temperature, and flue gas has little oxygen from the combustion process.

FGR is more prevalent than steam injection simply because of economics—generating steam for injection is more expensive.

Fuel bound. Fuel-bound NOx is inherent in fuel and cannot be reduced, except via post-combustion processes. Compared with other fuels, such as oil, the fuel-bound nitrogen in natural gas is low and considered insignificant.

Prompt. Prompt NOx “occurs through early reactions of nitrogen molecules in the combustion air and hydrogen radicals from the fuel.”¹ Recent “ultralow-NOx” designs have limited the generation of prompt NOx by minimizing the formation of substoichiometric regions in the flame.

Keyword: Industry steam boiler,Low-NOx Emission Burner, low NOx Industrial Boilers

Source: http://www.zgsteamboiler.com/news/Low-NOx-Emission-Burners-for-Industrial-Boilers.html

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Packaging & Delivery

Packaging Detail:Wooden box package of Low-NOx Emission Burners for Industrial Boilers

Delivery Detail:20-40 days after payment

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Why choose ZG as industrial steam boiler manufacturer?

We have over 70 years' experience of industrial steam boiler and autoclave, and we have a professional installation and after-sales staff for products.Take advantage of the most economical way to improve efficiency and operating flexibility, Get substantial savings on your fuel costs,Reduce all emissions for each K/W of electricity generated, including CO2.

How about the quality of Low-NOx Emission Burners for Industrial Boilers?

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Our industrial steam boiler manufactured strictly according to national and international standard. our products have approved ASME, IBR, ISO9001-2008, etc

All our company's products are 100% factory inspected to ensure the high quality.

We provide one year quality warranty service, please rest assured purchase.

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ZG service ensures that this will not happen. During installation of industrial steam boiler, 1-2 experienced engineering and technical personnel will be sent for the site representative for technical tests and installation instructions free of charge; processing the various problems arising in the course timely while installing.

Industrial Steam Boiler Company Information--- ZG Boiler

Established:In 1945

Number of Employees:above 1500 People

Our products:industrial horizontal steam boiler and hot water boiler(biomass boiler, gas boiler, oil boiler, coal boiler, etc), CFB boiler, power plant boiler, waste heating recovery boiler, Pressure Vessel(AAC autoclave, Curing tank,etc )

Factory Size (Sq.meters):400,000 square meters

Factory Location:Factory 1: Zhengzhou,,Henan, China. Factory 2: Xingyang,Henan,China

Number of R&D Staff:376 people

Our Trade & Market

Export Percentage:30-40%

Total Annual Sales Volume:US$100 Million

Main Market:South America(Colombia, Venezuela, Guyana, Suriname, Ecuador, Peru, Brazil, Bolivia, Chile, Paraguay, Uruguay, Argentina and French Guiana), North America(Bahamas, Canada, Costa Rica, Cuba, El Salvador, Guatemala, Honduras, Haiti, Jamaica, Mexico, Nicaragua, Panama), Eastern Asia(Mongolia / Russia / North Korea / South Korea / Japan), Oceania(Australia, New Zealand, Fiji), Mid East(Bahrain, Egypt, Iran, Iraq, Israel, Jordan, Kuwait, Lebanon, Oman, Qatar, Saudi Arabia, Syria, UAE and Yemen, Palestine, Algeria, Libya, Morocco, Tunisia and Sudan, Mauritania and Somalia), Africa(Egypt, Sudan, Libya, Tunisia, Algeria, Morocco, Ethiopia, Somalia, Kenya, Tanzania, Sierra Leone, Liberia, Cote d'Ivoire, Ghana, Togo, Niger, Nigeria, Cameroon, Gabon, Congo (Brazzaville), Zambia, Zimbabwe, Angola, Mozambique, Botswana, Namibia, South Africa), South Asia(Nepal, Bhutan, India, Pakistan, Bangladesh, Sri Lanka, Maldives) Southeast Asia(Vietnam, Laos, Cambodia, Thailand, Myanmar, Malaysia, Singapore, Indonesia, Brunei, the Philippines, East Timor) Domestic Market(China)

Source: http://www.zgsteamboiler.com/news/Low-NOx-Emission-Burners-for-Industrial-Boilers.html

Pre:  Blow Down Calculation for Boiler

Next:  Lower Emissions with Low NOx Boilers Manufacturer

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