Cradle to Gate
Identity ID
4efafb02-f6e4-4435-a69d-9b330f82f8aa
Waste treatment
Associated ID
a1922d96-485b-4584-b193-0a35f623d727
Included activities starts
Included activities ends
Description
Acrylic glass (PMMA) granules are widely used in fields such as advertising decoration, furniture manufacturing and handicraft production; this project is modelled with waste acrylic glass as the raw material, and no additional solvent is added during the production process; the dataset includes the main raw and auxiliary materials of the production process (waste acrylic glass, natural gas, 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's environmental impact assessment report; the production activities of this product include manual sorting, cleaning, crushing, hot-melt extrusion, cooling and other process steps.
Activity Description
The production activities of this product include manual sorting of waste plexiglass impurities, manual cleaning of waste plexiglass scraps, crusher crushing, screw conveyor transportation of crushed materials to the hot melt furnace, hot melt furnace (natural gas heated to 180°C) hot melt extrusion, finished product cooling and other processes; the cleaning wastewater is reused after secondary precipitation, the waste gas is discharged after treatment in corresponding facilities, and solid waste is collected and disposed of in a classified manner
Process Description
Organic glass particles are made from waste organic glass (the chemical name is polymethyl methacrylate, abbreviated as PMMA, which is a polymer compound polymerized by methyl methacrylate. It is a thermoplastic with good transparency, chemical stability, mechanical properties and weather resistance, easy to dye and process, and beautiful appearance); the first phase of this project has an annual processing capacity of 1,000 Tons of waste organic glass are produced through manual sorting, cleaning, crushing, hot melt extrusion, cooling and other processes to produce organic glass particles. During the production process, the hot melt furnace uses natural gas as energy. The crushing process produces dust, the hot melt process produces VOCs, and the combustion of natural gas produces waste gas. Corresponding measures are taken to control various pollutants.
Time period
2020
2026
Geography
China
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
Manual sorting removes impurities in waste organic glass; in the cleaning process, waste organic glass scraps are manually placed in a pool for cleaning, dehydrated, and then crushed; the crusher breaks the waste organic glass to a suitable particle size; the crushed materials are sent to a hot melting furnace through a screw conveyor, and the hot melting furnace uses natural gas as energy to heat to 180°C, melting the waste organic glass into a transparent glass liquid without bubbles, streaks, or crystallization, which is evenly mixed by the pressure and shear force generated by the screw rotation and formed through the die; after extrusion, the particles fall into a pool and are cooled to normal temperature to become the finished product; in terms of waste gas treatment, crushing dust is collected by a gas collecting hood and treated by a bag dust collector, the natural gas combustion exhaust gas from the hot melt furnace is treated by low-nitrogen combustion, and hot melt VOCs are collected by a gas collecting hood and treated by "UV photolysis + activated carbon adsorption"; wastewater is not discharged externally or is reused; solid waste is collected and disposed of in a classified manner.