Resource modification and utilization technology of urban solid waste incineration residues | South China University of Technology

Resource modification and utilization technology of urban solid waste incineration residues

Incineration of solid waste carbonization to prepare micro-nano calcium carbonate composite filler, resource utilization, carbon reduction and efficiency.

Type

Composites

Tags

Solid pollution prevention and control project

Resource reuse

Resource transformation and utilization

Municipal solid waste incineration

Solution maturity

Mass promotion / Mass production

Cooperation methods

Other

Applicable industry

Water conservancy, environment and public facilities management

Applications

Resource recycling

Key innovations

This technological innovation lies in using incineration of solid waste and CO2 to prepare high-quality micro-nano CaCO3 composite fillers to realize solid waste resource utilization and carbon emission reduction, while improving papermaking efficiency and reducing resource extraction.

Potential economic benefits

Less investment, preparation cost lower than traditional filler, significantly reduce the cost of tons of paper. Reducing mineral exploitation and carbon emissions has significant economic benefits.

Potential climate benefits

This technology directly captures CO2 in boiler flue gas to reduce emissions. Replacing papermaking wood pulp can reduce deforestation and energy consumption; replacing traditional fillers can reduce mineral mining and energy consumption, achieving carbon emission reduction in many aspects.

Solution supplier

South China University of Technology

South China University of Technology: South China's top engineering university, serving national strategies and regional development with scientific and technological innovation and training of high-quality talents.

China

Solution details

1. scope of application

Paper industry, environmental protection industry

2. Brief description of technology

The technology adopts a micro-nano surface modification method, using incineration products, Ca(OH)2/H2O and CO2 as raw materials, and using non-uniform nucleation and heterophase crystallization to generate a micro-nano CaCO3 modification layer with high whiteness and high specific surface area on the surface of the incineration products to prepare a calcium carbonate crystal composite material. Its production process is solid waste powder-filler mill-fine material dispersion tank-carbonization reactor (adding calcium hydroxide and boiler flue gas)-composite filler storage pool. The key equipment is the carbonization reactor and its systems. This technology has the characteristics of low investment, significant environmental and economic benefits.

3. technical information

1. The whiteness of the composite filler reaches 70%~80% ISO; 2. Composite filler particle size is 5~30μm; 3. The wear value of the composite filler shall not be higher than that of calcium carbonate, a commonly used filler in papermaking

4. comprehensive benefits

1. This technology comprehensively utilizes urban solid waste incineration powder resources and directly reduces the pollution of solid waste to the environment. 2. For crystallization and coating modification of this technology, the main modified raw materials required are calcium hydroxide and carbon dioxide. Carbon dioxide can use boiler flue gas, which reduces the carbon emissions of boiler flue gas; 3. Using modified composite fillers to replace traditional papermaking fillers can improve paper quality, increase paper ash content, and reduce the use of wood fiber. 4. Use modified composite fillers to replace traditional papermaking fillers. The cost of composite fillers is lower than that of existing commonly used papermaking fillers, reducing the cost per ton of paper. 5. Reduce the exploitation of mineral resources.

Last updated

11:23:21, Nov 05, 2025

Information contributed by

Green Technology Bank

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