Cradle to Gate
Identity ID
1eafefb1-1303-4332-b577-599fe3b70762
Waste treatment
Associated ID
ba9c5b60-d76e-49b3-bbf0-b33365e2b161
Included activities starts
Included activities ends
Description
The decorative glass in this project is widely used in fields such as architectural decoration. It is a product of the regeneration and utilization of waste resources, and meets the encouraged-category requirements of the Guidance Catalogue for Industrial Structure Adjustment; it is modelled with recovered waste cullet as the core raw material, and no special solvent is added during the production process; the dataset includes the main raw and auxiliary materials of the production process (waste cullet, light oil, electricity, water), energy consumption and pollutant emissions (waste gas, wastewater, noise, solid waste), while infrastructure such as the manufacture of production equipment and plant construction is not included within the dataset boundary; the data inventory is compiled from data in chapters such as the engineering analysis and pollution prevention and control measures of the project; the production process includes cleaning, feeding, melting, forming, annealing, cooling, packaging and shipment, with corresponding environmental-protection facilities provided to ensure that pollutants are discharged up to standard.
Activity Description
The production process includes cleaning waste glass cullet, with the resulting wash water settled and reused; feeding by belt conveyor; melting in a glass furnace heated with light fuel oil, which generates furnace exhaust gas; forming by calendering; annealing in a light-fuel-oil-heated lehr to relieve thermal stress; cooling in a cooling unit; and packaging and shipment. Supporting environmental-protection facilities include an alkaline scrubber for exhaust gas from melting, forming, and fuel combustion; a high-efficiency electrostatic oil-fume purifier for canteen exhaust; and an integrated wastewater-treatment system.
Process Description
Decorative glass is made from recycled waste cullet as the main raw material, and is produced through processes such as cleaning, melting, forming, annealing, and cooling. Light oil is used as fuel during the production process, and it is equipped with glass kilns, calenders, annealing kilns and other equipment. The products are mainly used in the fields of building decoration and other fields. They have resource recycling properties and comply with the requirements of the national policy on the industrialization of renewable resource recycling.
Time period
2018
2026
Geography
China
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
After cleaning, the waste broken glass is transported to the glass kiln via a feeding belt conveyor. The kiln uses light oil as fuel (sulfur content 1.63%, ash content 0.19%) and melts it into molten glass at high temperature (furnace melting area: 117 m², energy consumption: 67.1 kgce/t molten glass). The molten glass is then formed by a calendering machine and sent to the annealing kiln, which uses light oil heating, multi-layer insulation, hot air circulation, and zoned automatic temperature control technology to eliminate thermal stress. After annealing, it is cooled by a cooling unit and finally packaged and shipped. The exhaust gases from melting, forming, and fuel combustion are collected and treated by an alkali spray scrubber (dust removal efficiency 85%, desulfurization efficiency 80%) before being discharged at high altitude.