Fluidized Bed Incinerators
See also Pipe Retrofit
Fluidized bed incinerators are used both the industrial and sewage sludge incineration processes. The principle of fluidization is the process where a granular material in a solid state is turned into a fluid-like state by passing a fluid (liquid or gas) through it. As the fluid passes through the granular material, drag forces will overcome the force of gravity and the material will expand as the particles are moved away from each other. Eventually, as the fluid and material spread farther apart, the velocity slows and the force of gravity overcomes the drag forces, causing the particles to fall back down until they begin to fluidize again. Given sufficient fluid velocity, the particles will remain suspended or fluidized, and will exhibit fluidic behavior.
In the case of fluidized bed sewage sludge incinerators, preheated air is used to fluidize a bed of sand. The fluidized sand bed mixes violently and serves to distribute and break up the sewage sludge as it is pumped in, while simultaneously providing a very large surface area and well distributed supply of oxygen to promote combustion. CBE is well versed in working with fluidized bed incinerators and has the experience to work with your entire incineration system from feed, to incineration, to APC equipment. CBE has successfully designed several incinerator retrofits from tuyere domes to pipe tuyere systems, along with numerous repairs and incinerator optimization. |
CBE offers solutions which meet the individual plant requirements and assist with making the best choice considering technology, economy and efficiency.
|
A video rendering of a fluidized sand bed simulation performed by CBE using ANSYS Fluent.
|
A video from the sight glass of a fluidized bed sludge incinerator showing the bed sand fluidization at start-up.
|