In Mianyang, Sichuan Province, a modern benchmark project for the comprehensive utilization of construction waste resources is rapidly emerging. The Mianyang Chengxi Construction Waste Disposal Site project, for which Shanghai SANME Environmental Protection Equipment Co., Ltd. (hereinafter referred to as "SANME") provides a complete set of core equipment and process solutions, has a total investment of approximately 276 million yuan, a total land area of 73,700 square meters, and an annual processing capacity of 2 million tons. This project not only fills the gap in local construction waste disposal but also injects strong green momentum into Mianyang's "zero-waste city" construction.
Aerial view of the Sichuan Mianyang 2 Million Tons Annual Solid Waste Comprehensive Utilization Project
Project Overview and Industrial Closed Loop
As one of the first key projects for the recycling and reuse of urban construction waste in Mianyang City, this disposal site aims to achieve standardized, harmless, and resource-based treatment of construction waste in the Chengxi area. The project is being constructed in two phases: Phase I focuses on demolition and renovation waste, with annual processing capacities of 350,000 tons and 120,000 tons respectively; Phase II focuses on construction waste rock, with an annual processing capacity of 1.53 million tons. Upon full completion, the project is expected to generate an annual profit of 35 million yuan. The project has built a complete green industrial chain: in addition to one aggregate production line, one construction waste production line, and one renovation waste production line, it is also equipped with two mixing plants and one water-stabilized soil plant. Its service area covers Anzhou District, High-tech Zone, and Science and Technology City New Area, effectively alleviating the pressure on regional construction solid waste treatment and achieving a seamless process from "solid waste reception" to "recycled building materials output."
Image of renovation waste production line
"Reverse Design" Concept and Core Process Highlights
Shanghai SANME Co., Ltd. innovatively proposed a "reverse" resource-based design concept in its scheme design, where "back-end products determine front-end solutions," tailoring a "demolition + renovation" integrated co-processing line and a water-washed crushed sand and gravel production line for the project. This project will co-process urban solid waste (renovation/demolition waste) with natural/recycled sand and gravel raw materials. The project ultimately produces recycled aggregates of different particle sizes (5-31.5mm), which are further extended to recycled water-stabilized materials and recycled concrete, forming a high-value-added industrial closed loop. The project boasts several technological highlights: "Pre-screening followed by crushing" reduces energy consumption and increases efficiency: Bar screens and vibrating screens are used to pre-separate soil and fine materials, effectively reducing wasted work by the crusher and significantly reducing equipment wear. "Multi-stage sorting for precise impurity removal": Multi-stage air separation + magnetic separation stations are arranged after coarse and medium crushing to efficiently remove light debris and scrap metal, ensuring high-quality recycled aggregates. "Dry and wet combination" flexible production: Dry or wet production lines can be flexibly switched for raw materials with different moisture and mud contents (dry/wet materials), saving energy and ensuring stable production year-round. "Aggregate-water-stabilized-ready-concrete integration": The project is no longer limited to crushing and processing but has created a green building materials industrial park encompassing aggregate production, ready-mixed concrete, and water-stabilized material preparation, significantly enhancing resource utilization value.
Green Environmental Protection and 100% Resource Utilization
The project implements integrated treatment of dust, wastewater, and solid waste throughout: the crushing and screening process is equipped with a negative pressure bag filter system; the sand washing line achieves closed-loop recycling and zero discharge of production water; simultaneously, magnetic separation and air separation are used to accurately classify and recycle metals and light materials, ensuring clean production. Ultimately, 100% of construction solid waste is utilized as a resource—recycled aggregates are used in building material production, recyclable materials such as steel bars and plastics are sold externally, light materials can be used for incineration power generation, and slag is used for backfilling or brick making.
Equipment Support and Project Significance
Leveraging the advanced technology of the Sino-German joint venture, Shanghai SANME Machinery Co., Ltd. provided the project with high-performance equipment including HC/E-HSI series impact crushers, JC series European-style jaw crushers, SMW and DAS series air separators, BHFI series belt flotation machines, drum screens, tension screens, vibrating screens, and twin-shaft shredders. As a leading enterprise in China's solid waste resource utilization field, SANME has served over 130 projects across more than 40 cities nationwide. This Mianyang project is a key strategic move for the company in Southwest China and a practical step in implementing its "Zero Waste City" strategy. Another exemplary case of strategic planning. In the future, Shanghai SANME Construction Equipment Co., Ltd. will continue to drive green development through technological innovation, contributing its professional expertise to the upgrading of my country's construction solid waste resource utilization industry and the realization of the goal of building a beautiful China.
·On-site photo of the demolition of the waste production line
As a leading enterprise in the domestic solid waste treatment and resource utilization field, Shanghai SANME Construction Equipment Co., Ltd. has served more than 130 projects across multiple cities and provinces nationwide. The Mianyang Chengxi Construction Solid Waste Disposal Site project is an important part of Shanghai SANME Construction Equipment Co., Ltd.'s strategic layout in Southwest China and another significant achievement in its contribution to the construction of "zero-waste cities." In the future, it will continue to uphold the concept of "technological innovation and green development," using advanced technology and mature overall solutions to continuously promote the development of the construction solid waste resource utilization industry, contributing more to building a beautiful China and achieving green, low-carbon, and high-quality development.
