Highly polluting fuels mainly include coal (including coal products with coal as the main raw material), fuel oil (heavy oil and residual oil), charcoal, various combustible wastes and direct combustion biomass fuels (trees, straws, sawdust, rice husk, bagasse, etc.). ), and light oil with sulfur content greater than 0.5%, ash content greater than 0.0 1%, sulfur content greater than 30 mg/m and sulfur content greater than 30 mg/m.
If you barbecue with coal, not only the environment will be polluted, but also the barbecue food will be polluted.
Extended data:
Coal is classified in different ways, and the number of classifications is also different:
1. According to the different classification of its carbonization degree, it can be divided into peat, lignite (brown lignite, black coal), bituminous coal (raw coal), anthracite and sub-coal (one kind of lignite, unique to Japan). The carbonization degree of anthracite is the highest, and that of peat is the lowest.
2. According to the different classification of rock structure, it can be divided into candle coal, silk coal, dark coal, bright coal and vitrinite coal. The vitrinite with vitrinite content above 95% has bright surface and solid structure. Bright coal contains vitrinite and vitrinite, dark coal contains coarse particles, silk charcoal contains sericite, and candle coal consists of many microspores.
3. According to the amount of volatile matter contained in coal, it can be divided into lean coal (anthracite, volatile matter less than 12%), lean coal (volatile matter 12- 18%), coking coal (volatile matter 18-26%) and fat coal.
Baidu encyclopedia-coal