Coal washing products are primary energy, or the two energy?
Such as coal (coal), oil, natural gas, wind, water. Ocean energy, geothermal energy and nuclear fuel. The primary energy is converted into other forms of energy, such as coal gas, coke, electricity, steam and other petroleum products. It is called "the two energy source"
It can be useful to calculate and analyze the efficiency of energy use, which can be divided into primary energy and two energy sources. The general criterion for division is that any source of energy that is directly from the natural world, which is not processed or converted, is called "primary energy".
Do not change the shape of coal washing, just reduce the impurities contained in it; coal washing process does not like cracking on oil, coal coking gas, various fuels like will produce high-temperature flue gas, combustible gas, waste steam and load pressure fluid and other available substances. Coal washing process loss of selected substances is only a small amount of coal in mixed sublation in it, this conversion and other primary energy saving, waste rate nap: side, more importantly, in the coal washing and processing did not release any energy, is not the "first time" to be used as a source of energy use.
Based on this, I think it is wrong to put the coal washing products (washed coal, washed coal, washed coal, etc.) as the two energy. This is because the coal washing and processing is different from the general primary energy products to secondary energy products. Coal is mainly through jigging and flotation process will be different, the proportion of the physical size of the coal area separated from the mixed gangue in the coal removed
