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Pretreatment methods in solid waste disposal systems
The pretreatment methods for solid waste disposal mainly include the following, each of which has its specific application scenarios and advantages:
1. Packing
Purpose and effect:
● Increase bulk density, reduce volume, facilitate loading and unloading, transportation, storage and landfill, reduce transportation costs, and ensure transportation safety and hygiene.
● High-density inert blocks can be produced, which are convenient for use as building materials. Principle:
● Apply external force to loose solid waste to reduce its volume and make the solid waste dense.
● During the compaction process, the particles squeeze, deform or break each other, thereby achieving the effect of recombination.
Applicable objects:
● Solid waste with large compression performance and low recovery performance, such as cars, cans, plastic bottles, paper tape, cartons and certain fiber products.
● It is not suitable for solids such as wood, metal, glass, plastic blocks that are already very dense, or semi-solid wastes such as tar and sludge. Equipment type:
● Fixed waste balers: such as small household compactors, compactors equipped on waste collection vehicles, and special compactors configured at transfer stations.
● Mobile waste balers: such as tire-type or crawler-type compactors used at landfill sites, steel-wheeled cloth compactors, etc.
2. Crushing
Purpose and effect:
● Make transportation, incineration, pyrolysis, melting, compression and other operations possible or easy to carry out, more economical and effective.
● Provide convenience for sorting and further processing.
Principle:
● Through the action of external forces such as human or mechanical forces, the internal cohesion and intermolecular forces of the object are destroyed, causing the object to break and break. Equipment and methods:
● Common crushing equipment includes double-shaft shredders, garbage shredders, metal crushers, waste crushers, etc.
● Crushing methods include dry crushing, wet crushing and semi-wet crushing, etc.
3. Sorting
Purpose and effect:
● Separate the recyclable or unfavorable materials in the solid waste.
● Improve the utilization value of waste and reduce environmental pollution.
Principle and method:
● Gravity sorting: Separate by density difference of each component in solid waste.
● Magnetic sorting: Separate by magnetic difference of each component in solid waste.
● Other sorting methods include flotation, electrostatic separation, friction and bounce separation, electrostatic separation, etc.
Pretreatment methods for solid waste disposal include packaging, crushing, sorting, etc. In practical applications, these methods can be selected and combined according to factors such as the nature of the waste, treatment requirements and subsequent disposal methods. Through reasonable pretreatment, the waste treatment efficiency can be effectively improved, the treatment cost can be reduced, and the resource utilization and reduction of waste can be achieved. We are a manufacturer of solid waste disposal equipment and a 20-year-old factory. All the equipment required for the above solid waste disposal can be shipped directly from our factory at factory prices. Please contact us if you need it.