The solid waste generated by people in life is mainly residential garbage, business garbage and cleaning garbage of commercial enterprises, landscaping garbage, feces and sludge from urban sewage plants. How is the solid waste in this city classified?

Classification of urban solid waste

The decoration waste of urban construction refers to the solid waste generated during the demolition and construction and house decoration at the urban construction site, mainly bricks, gravel, concrete blocks, waste pipes, waste windows, decoration materials, and bulky garbage.

General industrial waste refers to production scraps, dust, debris, sludge, etc., mainly tailings, coal gangue, pulverized coal slag, slag, smelting waste oil, chemical waste, and waste textiles, waste plastics, waste metals, waste metals, waste paper and other easily recyclable industrial wastes.

General industrial waste has less harm to the environment and can basically be recycled. Industrial hazardous waste is solid waste with one or more hazardous characteristics such as corrosiveness, toxicity, reactivity, infectiousness, radioactivity, etc., mainly from smelting, chemical, pharmaceutical and other industries and hospitals, scientific research institutions, etc.

Agricultural waste refers to waste generated in agricultural activities, including straw and livestock manure. Renewable resources refer to harmless substances generated in daily life or industrial activities, which can be processed and reused as various resource-based wastes for classification, recycling, and secondary raw materials, including various waste plastics, waste metals, waste glass, waste paper, and waste fabrics. Domestic waste treatment projects mainly include domestic resource-based renewable resources and industrial resource-based renewable resources.

Purpose of domestic waste treatment equipment

1. Crusher:

Most of the domestic waste in the city is packed in plastic bags, and there are small bags in the big bags. If the garbage is not dispersed from the bags, it cannot be effectively screened later. Therefore, it is necessary to break or tear the garbage bags in the initial stage of the front end, and a bag breaker or crusher is usually used. Both tear open the garbage bags to disperse the garbage, which is conducive to subsequent screening.

The difference between the two is that the bag breaker usually only serves the purpose of tearing open the garbage bags, but does not break and separate the garbage in the bags into multiple individuals or fragments. The scattered garbage can avoid serious entanglement, pollution and adhesion.

The crusher can not only tear open the garbage bag, but also tear the garbage into multiple individuals and fragments, which can separate the garbage more effectively without causing sticking rolls and pollution.

2. Drum screen:

Also called drum screen, the slowly rotating cylindrical screening surface and the axis of the drum screen are generally installed at 3 to 5 degrees. During screening, the material is slightly transported from the high end. As the drum is constantly reversed in the screen, the fine particles finally pass through the screening surface. The inclination angle of the roller screen determines the axial walking speed of the material, and the behavior of the material perpendicular to the roller is determined by the rotation speed.

It is usually used for screening of domestic garbage, decoration and construction garbage, etc. The mesh size can be flexibly set according to actual needs. The roller screen technology is mature and can well screen garbage with different particle sizes, with high production capacity.

3. Bouncing screen:

The material is screened according to the weight, density, three-dimensional and plane shape of the elastic screen or the material. The material is screened into 2-3 types according to elasticity.

4. Relaxation screen:

The screening machine uses a polyurethane mesh chassis, and the polyurethane mesh foundation can be loosened to perform a trampoline effect. The movement is driven by two vibration motors. The challenging screening of wet or sticky materials is solved with this elastic screen. The dual vibration motors produce resonance to move the material in two ways. The first is the tightening and loosening of the polyurethane pad.

The second is material transportation, which will not cause dead corners or jamming due to the tightening and loosening of the screen chassis, avoiding blockage. The high acceleration of the material of the domestic waste treatment equipment makes it possible to separate materials that are difficult to separate. The screener can be designed with multiple layers, and there are also standard screen hole combinations.