A fire can advance very quickly in an exhaust stream
--with a typical duct velocity of 1,500 feet per minute in a 15-foot long duct, it takes only six-tenths of a second for a fire to travel in the exhaust stream
from the fusible links in a duct opening to the exhaust fan inlet.
Selective Catalytic Reduction (SCR) is a proven and advanced active emissions control technology system that injects a liquid-reductant agent through a special catalyst into the exhaust stream
of a diesel engine.
In order to ensure sufficient NOx reduction, a small amount of excess diesel exhaust fluid (DEF) is injected into the exhaust stream
Diesel exhaust fluid, or DEF, "is a solution of urea and de-ionized water that, when injected into the exhaust stream
(a process known as selective catalytic reduction) eliminates 90 percent of exhaust pollutants by converting them to nitrogen and water," according to the company's website.
Diesel exhaust fluid (DEF) is injected into the exhaust stream
of the engine, runs through a catalyst, and turns the NOx in the exhaust into harmless water vapor and nitrogen gas.
After a detailed review with the site engineering team, Babcock Wanson recommended replacing the existing Catalytic Thermal Oxidisers with a more effective Regenerative Thermal Oxidiser capable of treating the complete cooking exhaust stream
irrespective of the process heat load, an important feature in the fast moving food industry.
Approximately 70 meters restructuring of an 800 mm stormwater pipe from the exhaust stream
in to OV2.
Sabic's Technical Grade Urea will enable cleaner diesel technology in engines through liquid injection of urea solution into the exhaust stream
of the diesel engine prior to its catalytic converter.
There is a diesel particulate filter system that is regenerated by injecting diesel fuel into the exhaust stream
rather directly into the cylinder, thereby eliminating concerns of the fuel contaminating the engine oil.
The system enabling this performance consists of three components: a carbon capture unit utilising absorbent materials that can capture CO2 from the exhaust stream
, a compression and storage system, and a unit recycling the heat produced by the vehicle to operate the whole carbon capture system onboard, without any additional or external energy supply.
Other chemicals such as sulphur dioxide, some nitrogen oxides and mercury would also be condensed and could be safely removed from the exhaust stream
of the plants.
SCR works by spraying DEF into the exhaust stream
to destroy dangerous NOx chemicals using an advanced catalyst system, significantly reducing pollution.