In many applications the production of pollutants by industrial equipment is regulated by environmental laws. All fuel fired furnaces produce some pollutants in the waste gas. The main waste-gas components produced are Water Vapor and CO2. Regulated components of the waste stream can include CO, Oxides of Sulfur, Oxides of Nitrogen, VOCs and particulates.
Burns Energy Systems has the knowledge and tools to enable you to effectively reduce emissions from high temperature combustion processes.
Oxides of sulfur can be eliminated by using no sulfur fuels. Waste gas scrubbing equipment may be necessary in some circumstances where high sulfur synthetic fuels must be used. CO2 can be minimized by improving the efficiency of the process.
CO can be limited by ensuring that the combustion system never allows gas rich firing. This is usually done by firing the system with excess air, however, care has to be taken as too much excess air can lead to CO and VOC formation by a process known as flame quenching. Too much excess air reducers furnace efficiency and is therefore costly.
To avoid high energy costs, systems are available which improve the accuracy of the fuel-to-air ratio control. Electronic mass flow control is recommended for large burners and pressure compensated ratio control equipment is recommended for smaller burners. In all cases individual burner control improves performance. All Burns Energy Systems designed furnaces feature high accuracy individual burner ratio control systems.
NOx is controlled by a number of methods. Flue gas can be recirculated and added to the combustion air supply. Carbon Dioxide and Water Vapor from the waste gas are injected into the combustion air. Carbon Dioxide and Water Vapor breakdown in the flame, forming free radicals, which protect Nitrogen from oxidizing in the flame. Air staging and rapid mixing are methods to ensure the fuel and air are properly mixed and that the flame temperature is minimized. Control of the high speed gas flow inside the furnace chamber is essential to make these systems work properly.
We take great care to make sure that the furnace design and placement of the load do not contribute to pollutant formation.
Generally it is possible to certify any new system for use at your location. When contacting us, please let us know where the system is to be operated and who is responsible for enforcing the local environmental laws. The technology package offered will reflect your local requirements.