Cradle to Gate
Identity ID
1df3a35c-0671-48f2-bdc9-45be2fed5c38
Waste treatment
Associated ID
fc874e5e-b3c9-46be-9971-306b6bd5e0fd
Included activities starts
Included activities ends
Description
The characteristics of the municipal solid waste treated by the municipal solid waste incinerator (MSWI) in the urban area of Hengyang City, Hunan Province are as follows: kitchen waste 37.19%, paper 22.9%, rubber 22.84%, textiles (fibres) 9.93%, wood and bamboo 3.41%, ash and soil 0%, bricks, tiles and ceramics 1.15%, glass 2.14%, metal 0.45%, others 0%. Moisture content 51.43%, higher heating value 9094.91 kJ/kg, lower heating value 7146.88 kJ/kg.
The waste treatment activity is based on an average municipal/public waste mixture and is not suitable for a single specific waste such as plastics, paper, paperboard, etc. If your waste is a specific waste mixture, please inventory the corresponding waste separately. Each kg of this waste generates 0.205 kg of bottom ash and 0.05 kg of fly ash; the bottom ash is landfilled after precious metal recovery, and the fly ash is solidified with cement at a 1:1 ratio.
The average thermal efficiency of waste heat power generation is taken as 22%; in the waste heat supply process, no conversion between different forms of heat and energy is performed, so the thermal efficiency is higher, with an average of 64%; by integrating the thermal efficiencies of the waste heat power generation process and the direct heat supply process, 15% of the heat generated during waste incineration is used for power generation and 56% for direct heating.
Activity Description
After the waste enters the incineration plant, it is first accumulated and placed. During this process, a certain amount of leachate will be produced due to the high water content of the waste. The stored waste is then put into an incinerator for burning. The flue gas generated during the incineration process is processed through a flue gas purification device. The solid waste generated includes bottom ash and fly ash. The bottom ash is deposited at the bottom of the incinerator, and the fly ash is discharged with the flue gas. The heat generated by incineration is used for power generation or heating to achieve resource utilization. The electricity generated by waste heat power generation can be sold externally or used for internal recycling in the incineration plant.
Process Description
“Municipal solid waste” is primarily generated from a wide range of activities in many different sectors. "Municipal solid waste" includes the following components: food waste, paper, rubber, textile (fiber), wood and bamboo, dust, bricks, ceramics, glass, metal and potentially other components.
Such by-products (recyclables or waste) are generated by common transformation activities and can therefore be considered for modeling waste outputs of similar composition.
In the HiQ database, disposal methods for this by-product include: sanitary landfill, municipal incineration. In addition, this by-product is used in the following processes: Clinker production.
Time period
2022
2026
Geography
China,Hunan,Hengyang
Geography comment
National statistics, literature research
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
90% of the incinerators in China's waste incineration power plants use mechanical grate furnaces, and the waste heat boilers are of vertical, horizontal, and II-type configurations, with the horizontal type being the most common. The average equipment includes: in-furnace denitrification system, semi-dry flue gas deacidification tower, dry powder injection, activated carbon injection adsorption system, and baghouse filter. The in-furnace denitrification system primarily uses selective non-catalytic reduction (SNCR) and selective catalytic reduction (SCR).