Korea Institute of Energy Research

Korea Institute of Machinery & Materials

Korea Institute of Industrial Technology

Tae Young Mun

Jae Goo Lee

Myung Won Seo

Chang Won Yang

Young Cheol Park

Uen Do Lee

Ji Hong Moon

Young Doo Kim

Sang Jun Yoon

Soo Hwa Jeong

Jae-goo Lee

Hyun Seol Park

Chung Kyu Lee

Won Chul Cho

Dal Hee Bae

Sang In Keel

Do Won Shun

Jong Ho Moon

Hai In Lee

Byeong Ryeol Bang

Sung Ho Jo

Yun Tae Hwang

Ho Won Ra

Joon Mok Shim

Jin Han Yun

ChungKyu Lee

Pil Woo Heo

Soo-Hwa Jeong

Disclosed herein are a fluid sand falling type circulating fluidized bed boiler with a plurality of risers for preventing erosion and corrosion of water tubes and increasing combustion efficiency, and a method of operating the same. The fluid sand falling type circulating fluidized bed boiler with a plurality of risers includes a boiler section into which fuel and oxidizer are injected, a riser section connected to the boiler section so that the fuel and fluid sand supplied from the boiler section are introduced from the bottom of the riser section and flow up, and a relay section provided on the boiler section to supply the fluid sand having passed through the riser section to the boiler section, wherein the fuel is injected from the top of the boiler section and burned while flowing down therein.

Fluid sand falling type circulating fluidized bed boiler with a plurality of risers and method of operating the same

A method of preparing silicon using silica includes placing silica in a reaction chamber; adding a reducing agent into the reaction chamber; feeding a material for impact into the reaction chamber and sealing the reaction chamber; and reducing the silica to silicon by allowing the material for impact to generate a physical impact inside the reaction chamber. The preparation method of silicon using silica does not employ a high-temperature high-pressure process and provides a preparation method of silicon by which the porous structure of the silica before a reduction reaction is maintained within the silicon even after the reaction.

Method for manufacturing silicon using silica and silicon manufactured using the same

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Sejong-si, South Korea

Tae Young Mun