Cradle to Gate
Identity ID
8fd1fc43-83d0-42ef-a7dc-27dbc8ca7220
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 incineration (MSWI) facility in Inner Mongolia are as follows: kitchen waste 36.11%, paper 19.41%, rubber 14.35%, textile (fiber) 5.73%, wood and bamboo 3.87%, ash and soil 10.56%, bricks, tiles and ceramics 2.11%, glass 2.89%, metals 2.64%, others 2.35%. Moisture content is 48.12%, gross calorific value is 7088.35 kJ/kg, and net calorific value is 5320 kJ/kg. 43 kJ/kg.
Waste treatment activities are based on an average municipal/public waste mix and are not suitable for single specific waste materials such as plastic, paper, cardboard, etc. If your waste is a specific waste mixture, please separately account for the corresponding waste streams. Each kg of this waste generates 0.205 kg of slag and 0.05 kg of fly ash: after precious metal recovery from fly ash and bottom ash, the residues are landfilled, and the fly ash is solidified with cement at a ratio of 1:1.
The average thermal efficiency for waste heat electricity generation is taken as 22%; in the waste heat heating process, since no different forms of heat-to-energy conversion occur, the thermal efficiency is higher, with an average value of 64%. By integrating the thermal efficiencies of the waste heat electricity generation and direct heating processes, 15% of the heat generated from waste incineration 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,Inner Mongolia 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.