Cradle to Gate
Identity ID
679d9452-82c5-47d0-83c4-480816021a8b
Energy
Associated ID
812dc612-1624-40f7-a7da-8eb074adda19
Included activities starts
Included activities ends
Description
"This dataset represents the average situation of district boiler heat supply from coal-fired combustion in China. The core of its production process is the combustion of coal in the boiler, which directly converts chemical energy into thermal energy, producing steam or high-temperature hot water that meets the required parameters for heat supply. The coal consumption per unit of heat supplied by the coal-fired boiler is determined based on the mean value of local standard limits, and is uniformly converted into raw coal consumption; the uncertainty is considered in the data quality assessment. The quality parameters of the coal consumed adopt the national average consumed coal quality data. Information on the emission inventory data:
· For the emissions of major pollutants such as CO2, SO2, NOx and particulate matter, a mass balance method related to the coal quality parameters is adopted.
· The emissions of CH4, N2O, CO and NMVOC are estimated using the default emission factor values recommended in IPCC documents for coal combustion in the energy sector.
· The emission factors of halogens and trace heavy metal elements are taken from the literature.
· All emission amounts take into account the average removal efficiency of flue-gas pollution control technologies of China's thermal power plants."
Activity Description
The system boundary covers the entire operation and maintenance stage of the coal-fired district boiler house, including coal combustion, fuel-oil ignition and flame stabilization, water treatment, flue-gas denitrification, particulate-matter removal, flue-gas desulfurization, and the generation and disposal of solid waste. This is a single-output heat-generation process, so no co-product allocation is required.
Process Description
The product is heat in MJ, which is the sum of steam and hot water in energy terms. As an important energy product, heat is widely used in industrial production, building heating, domestic hot water supply and other fields in urban heating systems. Its essence is the form of thermal energy, which is transported and distributed through steam or hot water as a medium, and is ultimately measured and traded in terms of energy value.
Time period
2022
2026
Geography
China
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
Coal-fired district boiler heating refers to a thermal preparation method that directly burns coal and produces only heat. The core process includes: raw coal is prepared and sent to the boiler for combustion, which directly converts chemical energy into thermal energy, converts the water in the boiler into steam or high-temperature hot water, and finally produces heat measured in energy. The flue gas generated by combustion is purified using technologies such as selective catalytic reduction denitrification and limestone-gypsum wet desulfurization before being emitted.