Cradle to Gate
Identity ID
c42346e4-b193-4e26-a4ce-c69cf2a950e2
Energy
Associated ID
ffb43e14-9941-4752-80e7-18bdbbe4f460
Included activities starts
Included activities ends
Description
The composition of municipal solid waste treated by Shanghai municipal solid waste incinerators (MSWI) are as follows: kitchen waste 65.18%, paper 10.58%, rubber 15.99%, textiles (fibers) 2.03%, wood and bamboo 2.7%, ash and soil 0%, bricks, tiles and ceramics 0.68%, glass 2.31%, metals 0.54%, others 0%. Moisture content is 58.34%, higher heating value is 6325.63 kJ/kg, and lower heating value is 4321. 37 kJ/kg.
Waste treatment activities are based on an average municipal/mixed waste composition and are not suitable for single specific waste types such as plastic, paper, cardboard, etc. If your waste consists of a specific waste mixture, please account for the respective waste streams separately. Each kg of this waste generates 0.205 kg of slag and 0.05 kg of fly ash is landfilled after precious metal recovery from fly ash and slag, with the fly ash being solidified at a 1:1 ratio with cement.
The average thermal efficiency for waste heat electricity generation is 22%. In the waste heat district heating process, as there is no conversion between different forms of heat and energy, the thermal efficiency is relatively high, with an average value of 64%. By integrating the thermal efficiencies of both electricity generation and direct heating processes, 15% of the heat generated in the waste incineration process is used for electricity generation, and 56% is utilized 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
Heat is generated during waste incineration activities and is typically reused within the activity itself.
Time period
2022
2026
Geography
China,Shanghai
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.