管家婆马报图今晚资料更新

Special Report on Construction Waste

Part I : Introduction to Construction Waste and Why Recycling

Introduction to construction waste and why it should be resourced

What is construction waste?

What is construction waste

Construction waste refers to the collective name of muck, waste concrete, waste masonry and other wastes generated by people in the production activities of construction industry such as demolition, construction, decoration and repair. According to the source classification, construction waste can be divided into engineering slag, decoration waste, demolition waste, engineering mud, etc. According to the composition of components, construction waste can be divided into slag, concrete blocks, crushed stones, bricks, Waste mortar, mud, asphalt block, waste plastic, waste metal, waste bamboo and wood, etc.

2. What is the status of construction waste?

The status of construction waste

As of 2011, China's urban solid domestic solid waste stock has reached 7 billion tons, and the total amount of construction waste can be estimated to be 2.1 billion to 2.8 billion tons, and more than 300 million tons of new construction waste are generated each year. If simple stacking is adopted, the new construction waste disposal will occupy 150 million to 200 million square meters of land every year.

The amount of construction waste in China has accounted for 30% -40% of the total urban waste. Based on the standard of 500-600 tons / 10,000 square meters, by 2020, China will also add about 30 billion square meters of construction area, and the newly generated construction waste will be a shocking figure.

Third, why should we recycle?

Why recycle construction wasteSerious construction waste pollution
  1. Construction waste will cause a lot of pollution Whether it is piled in the open air or landfilled, construction waste will bring great pressure to the environment, and will cause pollution to the atmosphere, groundwater, and soil to varying degrees. When it is stored in the open air, it seriously affects the city's beauty and brings many problems for people's travel.
  2. Occupying vigorous land resources Regardless of whether it is landfilled or piled up, construction waste will occupy a certain amount of land, and land resources are very valuable, especially in large cities. The output of construction waste in large cities is often higher than that of ordinary cities. Therefore, solving the problem of construction waste is equivalent to recycling a lot of land resources.
  3. Circular economy At present, most of China's urbanization and infrastructure construction materials are mined and processed from ore. The use of mining resources will inevitably cause environmental and ecological changes, and it will take some time to recover, and resources have appeared in some areas. Tense situation. The use of construction waste to produce recycled building materials can greatly alleviate this situation and reduce the development and ecological damage of some mines.

Part II : Development and Vision of Recycling of Construction Waste

Development and vision of construction waste recycling

The first stage

Landfill-based, primary treatment of construction waste

Most of the materials are mainly landfilled with mobile equipment. The main products are low-quality sand and gravel. The environment is seriously polluted during the disposal process. It has not formed a market-recognized business model or received public support.

second stage

Intermediate treatment of construction waste

That is, the disposal is mainly at fixed facilities. The main products are qualified sand and gravel, various bricks, non-load-bearing plates, and inorganic materials. The resource utilization rate is generally below 80%, and the unresourced parts cause serious secondary pollution. The profit model is based on Government subsidies and policy support are the mainstays, and normal operations cannot be performed without subsidies.

The third stage (integrated factory)

High level of current construction waste disposal

That is, the disposal of fixed facilities is the main, and the renewable products are developing in a variety of types, high quality, and high value-added. The resource utilization rate is above 95% on average. The resource process has basically achieved pollutants standards. The profit model can no longer rely on government subsidies. Market-oriented operations.

The fourth stage (future model)

The future development direction of construction waste

With the introduction of the Industry 4.0 model, it is also necessary to have a 4.0 stage in the disposal of construction waste. Utilizing the "Internet +" operating model, digital design, digital construction, digital manufacturing, network integration, intelligent production and management, and material technology, energy technology, biotechnology, 3D printing technology are highly integrated with the construction of waste resources Gradually approaching a zero-pollution production model and continuously increasing the added value of recycled products will definitely become an important growth point for the green circular economy.

Part III : Equipment and Technology for Solid Waste Utilization of Jianye

Equipment and technology for solid waste utilization of Jianye Company

The relationship between Jianye and construction waste

Recycling of construction waste

Shanghai Jianye Heavy Industry Machinery Co., Ltd. has been committed to the research and development of construction waste recycling technology in 2006, and it has been nearly 10 years. In the beginning, Jianye won a bid for Baoshan's dust-free construction waste treatment project. The project was undertaken by Shishiye and mainly provided roadbed materials and cement and asphalt mixtures for Hutai Highway. Since then, it has successively provided equipment and technology for many construction waste treatment projects.

On the one hand, as the concept of environmental protection is gaining popularity, the market for construction waste resources has been repeatedly affirmed and given high expectations by the industry; on the other hand, the solid waste utilization technology owned by the market is not complete, and the added value of recycled products is low. Profit model, and it will cause secondary pollution to the environment, which cannot fundamentally solve the problem of construction waste. In short, the state and industry still have higher expectations and aspirations for the recycling of construction waste. Against this background, China Construction Metallurgical Co., Ltd. and Guoxun Co. reached a strategic cooperation in 2013, and established Guozhen Construction Metallurgical Environmental Protection Equipment Co., Ltd., which specializes in the promotion of construction waste resource recycling technology and concepts. Customers are endless. However, in view of the severe market situation, many users are still on the sidelines and are unwilling to invest in building factories immediately. However, it is gratifying that most visitors to the construction and recycling company's construction waste recycling technology gave a good evaluation and encouraged us to persist.

Although the market is still urgent, the recycling of construction waste will benefit the country and the people, and we are confident that it will bear fruit. In addition, this research and development bears the dream of Jianye for many years. If it is easily abandoned, the spirit of Jianye will be gone. So at the beginning of 2016, the Construction and Metallurgical Company established a new building materials division to increase the promotion of construction waste resources and renewable green building materials. It is believed that after the precipitation, the building materials business department is more fighting spirit, washed away that flashy layer, and left the user with more appropriate services, more complete, efficient and environmentally friendly construction waste resource recycling technology.

Technical route

The technical route of resource recycling of construction waste

In the process of crushing construction waste, because the properties, specific gravity, density, and hardness of various materials are different, the external force (energy consumption) required to crush these materials is also completely different. The previous fragmentation was simply a collision of particles, that is, a point-to-point collision of matter and matter. To achieve the ideal crushing method depends on two aspects: 1. The external force is large enough; 2. The material mass is heavy enough. Therefore, when crushing concrete, this crushing method is fully capable; but when crushing sintered bricks, due to the light weight and small kinetic energy of the sintered bricks, the collision force between the bricks is difficult to crush the bricks to the sand powder state. Traditional crushing is particle crushing.

The lamination regeneration technology uses the different characteristics of various substances to mix the substances together. Through external force (energy consumption), spherical contact occurs between the substances and the layers are extruded layer-by-layer and collide with each other. Multi-angle pressure transmission. High-density, high-hardness materials form a pressure medium. The low-density, low-hardness materials (sintered bricks, cement stones) are crushed to form sand powder; the remaining strong and high-density materials are natural sand and natural stones. Can be well separated and utilized. Laminated recycling technology crushing belongs to group crushing.

The advantages of laminated recycling technology are: 1. low energy consumption; 2. high efficiency; 3. can effectively regenerate the main substances in construction waste into sand powder and increase value.

Process layout

Process layout of resource recycling of construction waste

The deep processing of brick-concrete construction waste highlights the need to solve the uneven moisture content of brick-concrete construction waste and the imbalance of brick-concrete construction waste and concrete construction waste entering the plant. Therefore, “Industrial Construction Waste Disposal System and Process Flow Layout” was specially invented. Its characteristics are crushing-homogenizing air-drying-grinding, entering the construction waste and pretreatment, and then entering the homogenizing air-drying warehouse for air-drying for 15 days. , And then resource processing. The harmless treatment and the resource treatment are disconnected without affecting each other, and the balanced production is completely realized. The traditional construction waste treatment is pile-and-treat. The problems are that the random pile occupies a large area and the composition of the construction waste changes greatly, which is an unfavorable factor for deep processing.

1. Mobile crushing and screening
Construction waste treatment-mobile crushing and screening
The mobile crushing and screening equipment is adopted to realize on-site treatment, and it is especially good at recycling the construction waste of some concrete structures.
Advantages: (1) Convenient and fast, can realize the utilization of construction waste in situ; (2) Break larger particles into smaller particles, creating more convenient transportation conditions for deep processing.
Disadvantages: (1) Large secondary pollution; (2) Due to the restriction of the feed opening of the vehicle-mounted crusher, it is not possible to crush large materials over 900mm and requires the cooperation of an excavator.
2. Joint lamination technology
Construction waste disposal-fixed lamination technology
The crushing of the material is achieved through the lamination and crushing of a multi-stage roller grading machine, and it is very suitable for the construction waste of brick-concrete structure with complex composition, combined with magnetic separation equipment, slag separation equipment, and conveying equipment.
Advantages: (1) The pre-stressed steel and concrete can be peeled off; (2) combustible materials such as wood blocks are not broken to facilitate sorting and separation; (3) low-strength materials such as soil and slag are compressed into fine particles To facilitate the separation of the roller screening conveyor; (4) more environmentally friendly.
Disadvantages: (1) There are many factors to consider when selecting a site; (2) Although there is policy support, land use still requires state approval, and the commissioning period is long.
Recycled products
Construction waste recycling-recycled coarse aggregate (> 50mm)

Recycled coarse aggregate (> 50mm)

Construction waste recycling-recycled coarse aggregate (<50mm)

Recycled coarse aggregate (<50mm)

Construction waste recycling-recycled fine aggregate (sand)

Recycled fine aggregate (sand)

Construction waste recycling

Recycled muck

Key equipment
Mobile crushing plant

Mobile crushing plant

Roller grading machine

Roller grading machine

JYS / T high efficiency sand making machine

Waste slag combined grinding production line
Construction waste treatment-slag combined grinding production line
The construction waste slag combined extrusion resource treatment system is to further process the crushed material of the combined extrusion to the fine sand coarse powder, sand powder, recycled fine powder, and cement active material. It is mainly completed by the construction and metallurgy integrated suspension roller mill and micro-mill grinding. The combined equipment includes high-pressure mill , SCM superfine mill , JYX high-efficiency powder separator , GZD feeder , screw conveyor, etc.
Advantages: (1) enhance the added value of recycled products and innovate the profit model; (2) achieve endless use, less waste and less pollution.
Disadvantages: (1) The investment amount is slightly higher; (2) Because there are multiple stages of powder selection, the energy consumption is large
It is suitable for the enterprises with strong economic strength and excellent management experience, such as cement companies, large environmental protection companies, and power and steel companies to construct waste and waste projects.
Recycled products
Construction waste treatment-recycled mortar

Recycled mortar

Construction waste treatment-recycled mortar

Recycled meal

Construction waste treatment-recycled mortar

Recycled fine powder

Construction waste treatment-recycled mortar

Regenerated superfine powder

Key equipment
High pressure mill

High pressure mill

Integrated suspension roller mill

SCM Superfine Mill

Integrated processing plant
Construction waste treatment-integrated treatment plant
Upgrade model of integrated factory-type construction waste treatment. The focus of factory treatment is not only on how to clean up construction waste and achieve pollution-free, but also to discover profit points in construction waste, create profit points, and increase the differentiation of recycled products.
Advantages: Integrated processing and production not only solves the place of construction waste, but also innovates the profit model.
Disadvantages: (1) slightly higher investment amount; (2)
It is suitable for the enterprises with strong economic strength and excellent management experience, such as cement companies, large environmental protection companies, and power and steel companies to construct waste and waste projects.
Recycled products
Construction waste disposal-railway sound insulation wall

Soundproof wall

Construction waste treatment-recycled mortar

Acoustic panels

Construction waste treatment-recycled mortar

Ceramsite brick

Construction waste treatment-recycled mortar

floor

Construction waste treatment-recycled mortar

Ceramic tile

Construction waste treatment-recycled mortar

Permeable brick

Construction waste treatment-recycled mortar

Aerated cement block

Construction waste treatment-recycled mortar

Hollow brick

Investment Analysis

First, the trend of fine construction waste processing
(1) Needed for debris separation. Harmless treatment of construction waste is the foundation. Without the separation of debris from construction waste, there is no large-scale application of recycled materials in cement-based building materials.
(2) Need for separation of raw and cooked. Recycling of construction waste is the key. Without detailed deep processing, it is difficult to separate and recycle the recycled aggregate and recycled powder.
Second, the market needs refined new materials
(1) Need for economic benefits. Recycled powder and reclaimed sand have a much higher market value than recycled coarse aggregates. Recycled materials are lightweight. They are an advantage for functional materials and a disadvantage for structural materials.
(2) Market demand. Recycled powder and recycled sand are far more versatile than recycled aggregate. Coarse aggregate is the raw material for concrete, and sand and powder are the raw materials for all cement-based building materials.
Third, refined reuse is more energy-saving
(1) Need for utilization efficiency. Cement stone and sintered clay brick belong to the category of "clinker". Recycled powder, as an auxiliary cementing material, partially replaces cement, which is more energy-saving.
(2) Needs for social benefits. Cement production has high energy consumption and high pollution, so comprehensive use of sintered waste slag powder as a mixed material and admixture is an important means to achieve energy conservation and emission reduction.
4. The development process of the building materials industry is a process of refinement
(1) The general trend of fine building materials. The era of "all kinds of mud" has passed. The market needs a lot of functional concrete, mortar, wall materials and floor tiles.
(2) The trend of greening building materials. The three major recycled materials of recycled coarse aggregate, recycled sand, and recycled powder all cover the needs of greening cement-based building materials.
V. Project Analysis Form
project name Recycled powder (10,000 tons) Recycled sand (10,000 tons) Recycled aggregate (10,000 tons) Subgrade material (10,000 tons) Power (KW) Labor force Total land area (mu) Construction period (days)
200,000 tons / year project 6 6 6 2 700 8 * 2 10 90
500,000 tons / year project 15 15 15 5 1700 12 * 2 30 120
1 million tons per year 30 30 30 10 3000 20 * 2 50 180

Shanghai Jianye Heavy Industry Machinery Co., Ltd. Address: No. 1389 Jinqiao Road, Pudong New District, Shanghai , Shanghai ICP No. 08511074

Consulting Hotline: 400-670-9985
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