Reciprocating Step grate

Minimal Pretreatment of Waste: Urban domestic waste does not require extensive pretreatment, such as strict screening, crushing, or other complex processes. It only needs to settle naturally in the storage pit, be compressed and dehydrated, and partially fermented before entering the furnace for combustion. This feature significantly reduces the initial costs and workload associated with waste treatment.

Segmented Combustion Process: The combustion on a reciprocating step grate occurs in stages, similar to that of a chain grate. By using segmented air supply and appropriately adding secondary air, the waste goes through various stages—drying, distillation, volatile matter ignition, coke combustion, and ash burnout—to ensure thorough combustion. For instance, some urban domestic waste incineration power plants use the reciprocating step grate process. Here, urban waste is delivered to the plant by specialized trucks, automatically weighed at the weighbridge station, and unloaded into the closed, slightly negative-pressure waste pool. After a period of storage, fermentation, and dehydration, the waste is sent to the reciprocating step grate for incineration, achieving waste reduction, harmless treatment, and resource recovery.

Simple Structure and Effective Smoke and Dust Removal: The reciprocating step grate features a simple structure, is easy to manufacture, consumes little metal, and has good smoke and dust removal capabilities. It is widely used in small industrial boilers and represents a combustion technology with growth potential. Typically, the grate is strip-shaped or plate-shaped and is fixed at the bottom of the furnace or combustion chamber using surrounding frames. While its operation may involve a higher level of manual labor, it offers certain cost advantages for small- to medium-sized urban domestic waste treatment projects.

trong Adaptability: The reciprocating step grate is highly adaptable and can handle the complex composition, low calorific value, instability, and high moisture content of urban domestic waste. By adjusting the residence time of waste and flue gas within the furnace, the formation of secondary pollutants can be minimized, and stable combustion of the waste can be ensured.