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Energy-from-Waste Power Plants
In energy-from-waste plants which convert waste (trash) from urban areas to fuel electrical generation, SOLVAir products effectively reduce HCl, SO2, SO3, and mercury (Hg) emissions, and additionally may provide some reduction in NOx.
Our products are sodium-based and have benefits for Electrostatic Precipitator performance, which allow the addition of particulate loading without causing opacity excursions. For baghouse applications, the added retention time increases sorbent efficiency.
Environmental concerns have generated the need for alternative power generation sources. If waste contains 50% organic material, such as yard waste, it is considered biomass. Today, over 87 facilities nationwide convert more than 90,000 tons per day of trash into clean electrical energy to provide service to 2.3 million homes nationwide, and the number of facilities continues to grow.
While the positive aspects of energy-from-waste plants are implicit, the contents of the waste stream vary. In general, generated flue gases are acidic and must be controlled and treated to reduce corrosion and comply with environmental regulations.
Often, HCl is the key component to be treated due to the combustion of plastics. However, SO2, SO3, NOx and mercury (Hg) may also be emitted and must be treated.
Mercury and other heavy metals are also released from waste combustion. Without treatment, the presence of SO3 reduces the chemical absorption of these metals on materials like Powdered Activated Carbon (PAC) or fly ash; but treatment of the flue gas with SOLVAir products can noticeably improve the performance of PAC.
In a dry injection process in the flue gas stream, SOLVAir Select 200 trona or Select 300 sodium bicarbonate help control these pollutants. This system is a low capital cost option that meets treatment needs of waste burning utilities, and equipment can be installed quickly for trials or permanent installations.
Our SOLVAir technical staff can help identify the optimal injection strategy depending on the system configuration and desired reduction targets.
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