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Taiwan Power Company

Environmental Protection at Thermal Power Plants

Index > Information Disclosure > Environmental Information > Environmental Protection at Thermal Power Plants

Reuse of By-Products

The By-Product Produced in Coal-Fired Generator

It will produce some particles while coal is fired by the boiler. The particles with higher weight are fallen to the bottom of the boiler, which called bottom ash. Also, we called the particles with lower weight as fly ash, and these particles are collected by ESP.

In addition, the FGD use high-concentration limestone solution to react with the Sulfur dioxide in flue gas to Calcium sulfite. Then Calcium sulfite will be oxidized to Calcium sulfate by air in the absorption tower, that is plaster.

 

Reuse of Coal Ash

The coal-fired generators will burn coal and produce coal ash which called bottom ash and fly ash.

  1. Bottom ash is rougher, and it looks like sand in gray or black, which is Polygonal shape with pores on the surface. It can use to make brick, building materials etc.

  2. Fly ash is a kind of very fine powder colored in gray and it looks like cement. We usually add it to concrete in order to improve constructive property.

  3. Fly ash can also be used to replace some of cement for energy saving and carbon reduction. 

 

Reuse of Desulfurized Plaster

The coal-fired generators burn coal which contains sulfur so that it will produce sulfur oxides in the burned gas. In order to reduce sulfur oxides emissions, TPC has installed fume desulfurization equipment. The sulfur oxides in the flue gas are removed, and the desulfurized gypsum produced, which can be reused in the cement industry and fire-resistant plate industry.

Note: The percentage of GYPSUM utilization in 2012 and 2014 is more than 100%,because it included the amount stocked in 2011 and 2013. 

 
 

Others Business Industrial Waste Processing

  1. Storage: Classified according to the characteristics of its main ingredients and placed in a specific place.

  2. Clearance: Call the cleaning agency that the environmental protecting agency recognized to remove while waste accumulated to quite a mount.

  3. Removal: Delegated to the qualified disposal or clearance agency, according to its kind, characteristics and reusability