Cradle to Gate
Identity ID
2cccff7f-801a-4b1c-93fc-3680d8e132be
Energy
Associated ID
ffb43e14-9941-4752-80e7-18bdbbe4f460
Included activities starts
Included activities ends
Description
The composition of municipal solid waste treated by municipal solid waste incinerators (MSWI) in Xinjiang are as follows: kitchen waste 76%, paper 2.4%, rubber 5.4%, textiles (fibers) 4.2%, wood and bamboo 2.5%, ash and soil 0%, bricks, tiles, and ceramics 6.4%, glass 2.4%, metals 0.8%, and others 0%. Moisture content is 60.15%, higher heating value is 4148.64 kJ/kg, and lower heating value is 2183. 4 kJ/kg.
Waste treatment activities are based on an average urban/public waste mixture and are not suitable for single specific waste materials such as plastics, paper, cardboard, etc. If your waste is a specific waste mixture, please account for the corresponding waste separately. Each kg of this waste generates 0.205 kg of slag and 0.05 kg of fly ash: after recovery of precious metals from fly ash and slag, they are landfilled; fly ash is solidified at a 1:1 ratio with cement.
The average thermal efficiency for heat-to-electricity generation from waste heat is 22%. In the waste heat utilization for heating, no different forms of heat and energy conversion are involved, resulting in relatively high thermal efficiency, with an average value of 64%. By considering the thermal efficiencies of both the electricity generation and direct heating processes, 15% of the heat generated from the waste incineration process is used for electricity generation, and 56% is used for direct heating.
Activity Description
After waste enters the incineration plant, it is first piled and stored, during which leachate is generated due to the high moisture content of the waste. Subsequently, the stored waste is fed into the incinerator for combustion. The flue gas produced during incineration is treated through flue gas purification systems. The resulting solid residues include bottom ash and fly ash, with bottom ash deposited at the bottom of the incinerator and fly ash carried away with the flue gas. The heat generated from incineration is utilized for power generation or heating, achieving resource recovery. The electricity produced from waste heat recovery can be sold externally or reused within the incineration plant.
Process Description
This product represents electrical energy in units of kWh. Electricity generated internally by a solid waste incineration plant.
Time period
2022
2026
Geography
China,Xinjiang Uygur Autonomous Region
Geography comment
National statistics, literature research
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
In China, 90% of waste-to-energy power plants use mechanical grate incinerators for their furnaces, with waste heat boilers configured in vertical, horizontal, or II-type arrangements, primarily adopting the horizontal layout. These facilities are typically equipped with the following systems: in-furnace denitrification system, semi-dry flue gas desulfurization tower, dry powder injection, activated carbon injection adsorption system, and baghouse dust collector. The in-furnace denitrification systems mainly employ selective non-catalytic reduction (SNCR) and selective catalytic reduction (SCR) technologies.