Ma'anshan City Langxi Heavy Industry Machinery Technology Co., Ltd.
Ma'anshan City Langxi Heavy Industry Machinery Technology Co., Ltd.

Continued global energy consumption, population growth and accelerated urbanization are forcing us to seek innovative solutions to the challenge of depleting traditional fossil fuel resources. Refuse Derived Fuel (RDF) and Solid Recovered Fuel (SRF) are not only able to meet our energy needs, but also to recycle resources by converting combustible solid waste into energy.


Importance of calorific value in alternative fuels:

  • Calorific value is a key indicator of fuel quality. The higher the calorific value, the more heat is produced during combustion.RDF and SRF are created by sorting and pulverizing combustible materials from garbage, such as plastics, fibers, rubber, wood, and food waste, into alternative fuels. By removing most of the inert material, their calorific value is significantly increased.

  • According to EN ISO 21640:2021, SRF are graded according to their calorific value, chlorine and mercury content. typical calorific value of SRF is around 18 MJ/kg, while higher grades of SRF can have a calorific value of up to 20 MJ/kg. the calorific value of RDF is typically around 23 MJ/kg, which is comparable to the calorific value of coal.

  • This shift not only maximizes energy recovery, but also promotes sustainable waste management practices.

Types of Solid Waste System Solutions

Waste Tire Replacement Fuel (TDF) System
Waste Tire Replacement Fuel (TDF) System
The solution is applicable to waste tires (TDF), the whole line structure modular design, with low noise, low energy consumption, high output, uniform discharge and other advantages. Waste tires are sent to the twin-shaft shredder for crushing through the belt conveyor, and the crushed rubber blocks are screened by the sifter, and the materials that do not meet the particle size requirements are returned to the crushing system for secondary crushing until they meet the requirements of the discharge particle size, so as to obtain the high calorific value of the waste tires as the derivative fuels (TDF) to realize the recycling of resources.
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Bulky Waste Replacement Fuel (RDF) Recycling System
Bulky Waste Replacement Fuel (RDF) Recycling System
The solution is applicable to the resource treatment of large quantities of waste mattresses and sofas. Through two-stage crushing by double-axis shredder and four-axis shredder, the ferrous metal and combustible materials in the bulky garbage can be fully separated, and the crushed materials will go through the processes of magnetic separation and iron removal, RDF granulation, etc., so as to realize the resource recycling and utilization. The whole set of automated system can replace manual dismantling, with significantly higher production efficiency and higher recycling value.
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Industrial Solid Waste (RDF SRF) Recycling System
Industrial Solid Waste (RDF SRF) Recycling System
The solution is mainly for waste textiles, waste plastics, leather trimmings and other high calorific value industrial solid wastes, using the shredder crushing concept, not only to achieve the crushing of complex raw materials, but also to ensure that 95% of the material particle size compliance rate, to facilitate the production of the back-end of the RDF molding material, but also to meet the demand for the sale of the SRF bulk material, a set of systems can produce RDF molding material and SRF bulk, and are both One system can produce RDF molding material and SRF bulk material, and both are high quality alternative fuels. One system can produce RDF molding material and SRF bulk material, and both are high quality alternative fuels.
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Biomass Replacement Fuel (RDF SRF) System
Biomass Replacement Fuel (RDF SRF) System
Biomass is a renewable energy source and an environmentally friendly alternative to traditional fossil fuels, contributing to sustainable waste management and energy production. With advances in processing technology, the utilization of agricultural waste as biomass fuel has great potential in terms of both environmental and economic benefits.
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Alternative Fuel (RDF/SRF) Recovery Systems, Including The Preparation of The Following Materials

Domestic Waste

Domestic waste contains a large number of raw materials that can be recycled, such as high calorific value combustibles that can be used to prepare alternative fuels (RDF/SRF), organic materials that can be made into compost or used for digester fermentation, as well as plastics, glass, and metals that can be recovered for direct refurbishment and use or processed as raw materials.

Remodeling Waste

The amount of renovation waste is increasing, and a large portion of it consists of combustible materials such as wood, foam, plastics, and other high calorific value items. These materials provide valuable opportunities for energy recovery and reuse, making renovation waste an important resource for sustainable development.

Industrial Solid Waste

Industrial solid waste can be converted into high calorific value “alternative fuels (RDF/SRF)” through pre-processing, replacing fossil fuels as fuel for waste-to-energy generation.

Waste Tires

The development of waste tires as an alternative fuel (TDF) for cement production can reduce greenhouse gas emissions and the consumption of non-renewable resources. Tires produce as much energy as oil when burned. The high calorific value of waste tires makes them a good alternative fuel for energy-intensive industries such as cement plants, power plants and paper mills.

Waste Textiles

Waste textile pollution mainly originates from leather trimmings, cloth trimmings in textile processing and used clothes in post-consumer stage. Among the ways of resource utilization of waste textiles, the preparation of RDF/SRF alternative fuels is the more adaptable and cost-effective way.

Biomass

The biomass straw processing market is expected to grow steadily in the coming years with the increasing availability of agricultural by-products such as crop residues. Biomass is a renewable energy source and an environmentally friendly alternative to traditional fossil fuels, contributing to sustainable waste management and energy production.

Comparison of Calorific Values of Fossil Fuels and Alternative Fuels

Comparison of Calorific Values of Fossil Fuels and Alternative Fuels
FuelCalorieCO2/Tonne of Fuel Produced
Coal25MJ/kg2.41
Oil Coke33MJ/kg3.34
Fuel Oil42MJ/kg3.16
SRF20MJ/kg0.64


Table of alternative fuel use per unit of coal and CO2 emissions:

0SRFSRFSRFSRF
Lower Calorific Value (MJ/kg)12151825
Substitution Required210%170%140%100%
Fossil CO2 Emissions~30%~30%~30%100%


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