Abstract: The present invention provides a water purifying device that may include: an upper cover that is configured to have an inlet for liquid; two or more light source modules that are configured to include a light source that emits a UV ray; two or more light guide plates that are configured to guide, to the front, the UV ray that is incident through the lateral side thereof from the light source module to then be output; a purifying plate that is configured to provide a flow path through which liquid flows, and that is configured to provide a plate-type photocatalyst that is disposed on the flow path so that the UV ray emitted from the light guide plate reaches the plate-type photocatalyst in order to thereby purify the liquid; and a lower cover that is configured to have an outlet for the liquid.

Abstract: Provided is a method of economically modifying low rank coal (LRC) to be high grade coal having minimized water re-absorption and minimized spontaneous ignition possibility while saving energy by coating heavy oil directly on coal without using solvent oil. Provides is a method of modifying coal using palm oil residue, including milling the coal, homogenously mixing the palm oil residue with the milled coal, melting the palm oil residue mixed with the coal so as to be coated on a surface of the coal, and simultaneously drying moisture in the coal, cooling the dried coal, and briquetting the cooled coal.

Abstract: The present invention provides a water purifying device that may include: an upper cover that is configured to have an inlet for liquid; two or more light source modules that are configured to include a light source that emits a UV ray; two or more light guide plates that are configured to guide, to the front, the UV ray that is incident through the lateral side thereof from the light source module to then be output; a purifying plate that is configured to provide a flow path through which liquid flows, and that is configured to provide a plate-type photocatalyst that is disposed on the flow path so that the UV ray emitted from the light guide plate reaches the plate-type photocatalyst in order to thereby purify the liquid; and a lower cover that is configured to have an outlet for the liquid.

Abstract: Provided is a method of economically modifying low rank coal (LRC) to be high grade coal having minimized water re-absorption and minimized spontaneous ignition possibility while saving energy by coating heavy oil directly on coal without using solvent oil. Provides is a method of modifying coal using palm oil residue, including milling the coal, homogenously mixing the palm oil residue with the milled coal, melting the palm oil residue mixed with the coal so as to be coated on a surface of the coal, and simultaneously drying moisture in the coal, cooling the dried coal, and briquetting the cooled coal.