With the acceleration of urbanization, the amount of construction waste generated is increasing rapidly, and the environmental pollution and resource waste caused by traditional treatment methods are becoming increasingly prominent. Against this background, the near-zero emission mode of construction waste based on mobile crushing system came into being, providing a low-carbon, environmentally friendly and efficient solution for urban renewal.
At present, the international construction waste treatment mainly adopts landfill, stacking and resource utilization. In developed countries such as Japan and Germany, the resource utilization rate of construction waste has exceeded 90%, while the resource utilization rate in my country is less than 30%, and there is a large room for improvement. As an emerging construction waste treatment technology, the mobile crushing system has gradually become a research hotspot in the field of international construction waste treatment due to its flexible, efficient and environmentally friendly characteristics.
Technological breakthrough of mobile crushing system
The mobile crushing system integrates crushing, screening and transportation, realizing the on-site treatment and resource utilization of construction waste. Its technological breakthroughs are mainly reflected in the following aspects:
1. Equipment structure innovation
Crawler/tire chassis design: Adapt to complex terrain operations, can be flexibly moved to the demolition site, reducing transportation costs and secondary pollution.
Modular combination: The modular design of jaw crusher, impact crusher, screening, magnetic separation, etc. can be flexibly combined according to actual needs to achieve intelligent linkage and improve processing efficiency.
2. Zero pollution core design
Multi-stage dust removal device: Equipped with pulse bag dust removal and spray dust reduction dual systems, it effectively controls dust emissions and achieves zero pollution on the operation site.
Enclosed noise reduction cabin and oil-electric hybrid power: The closed noise reduction cabin design is adopted to reduce the noise of equipment operation; the oil-electric hybrid power (electric/diesel dual drive solution) can select the power mode according to actual needs to reduce energy consumption and emissions.
Full-process practice of on-site resource utilization
The near-zero emission mode of construction waste based on the mobile crushing system realizes the full-process resource utilization of construction waste from pretreatment to recycled product production.
1. Pretreatment stage
Intelligent sorting robot: Automatically remove non-crushed objects such as metal and wood to improve subsequent crushing efficiency.
Hydraulic cyclone: Dehydrate and dry the slag slurry to provide a suitable material moisture content for subsequent crushing.
2. Crushing and regeneration stage
Three-stage crushing process: Through three-stage crushing, construction waste is crushed into different particle sizes of 150mm, 50mm, and 5mm to meet the needs of different recycled products.
Aggregate strengthening technology: Adopt material modification technologies such as nano-crystallization agent to improve the strength and stability of recycled aggregates, so that they can reach or even exceed the performance of natural aggregates.
3. Recycled product matrix
Roadbed materials: Recycled aggregates can be used for road cushions, replacing natural sand and gravel to reduce construction costs.
Environmentally friendly building materials: Recycled aggregates can be made into environmentally friendly building materials such as permeable bricks and lightweight partition boards, which are used in sponge city construction and other fields.
Industrial raw materials: Combustible components can be used to prepare RDF fuel for cement kiln coordinated disposal to achieve energy recycling.
Economic and ecological dual benefit model
The near-zero emission mode of construction waste based on the mobile crushing system achieves a win-win situation of economic and ecological benefits.
1. Cost comparison analysis
Reduced transportation costs: On-site crushing and processing can reduce freight costs by 15-23 yuan per ton of garbage.
Government subsidy mechanism: Resource-based products can enjoy preferential policies such as VAT refund and collection, reducing the operating costs of enterprises.
2. Carbon emission reduction accounting system
Reduce carbon emissions: Every 10,000 tons of recycled aggregate can reduce CO₂ emissions by about 450 tons, helping to achieve the city's carbon emission reduction goals.
Rainwater reuse gain: Sponge city permeable pavement can increase rainwater infiltration, reduce urban waterlogging, and improve water resource utilization.
As a leading domestic manufacturer of crushing equipment, Liming Heavy Industry provides a variety of mobile crushing stations to meet the needs of construction waste treatment of different scales and types. We have a professional team of engineers who can provide customized solutions according to your specific situation, including equipment selection, process design, on-site installation and commissioning. You are welcome to consult our engineers online to learn more about product information and get detailed prices and solutions.
The near-zero emission mode of construction waste based on the mobile crushing system is an effective way to achieve the reduction, resource utilization and harmless treatment of construction waste in the context of urban renewal. This model can not only solve the problem of construction waste treatment, but also create significant economic and ecological benefits, and contribute to the construction of a beautiful China. Liming Heavy Industry is willing to work with you to create a green future!
