Working Principle of Fully Automatic Environmental Cremation Furnace

Working Principle of Fully Automatic Environmental Cremation Furnace

Modern funeral cremators adopt two-stage high-temperature combustion technology combined with intelligent temperature control and integrated waste gas purification. The whole cremation process is divided into material combustion, flue gas re-combustion, exhaust treatment and ash collection.

First, human remains are sent into the primary combustion chamber through the feeding door. Gas or diesel burners heat the cavity steadily to 700–900 degrees Celsius. Under an oxygen-rich high-temperature environment, organic tissues decompose rapidly through pyrolysis and oxidative combustion. Moisture turns into water vapor, fat and protein burn into carbon dioxide and water, leaving only inorganic bone residues.

Incomplete combustion inevitably produces smoke, tar, volatile odor molecules and harmful waste gas. These byproducts are not directly exhausted; instead, they flow into the secondary combustion chamber (afterburner). The secondary chamber runs continuously at temperatures higher than 850°C with sufficient oxygen supply. Long residence time of flue gas inside the chamber ensures full cracking and oxidation of all pollutants, eliminating black smoke and pungent odors fundamentally.

After secondary incineration, high-temperature flue gas enters the flue gas purification system in sequence. Processes including cooling, dust filtration, desulfurization and denitrification remove particulate matter, sulfur oxides and nitrogen oxides. Treated clean exhaust meets international and domestic environmental protection emission standards before being released through the chimney.

Once one cremation cycle completes and the furnace cools down moderately, bone ash naturally drops into the closed ash collection bin at the bottom of the equipment. Workers can take out bone ash conveniently without dust flying. The whole operation is controlled by PLC automatic temperature adjustment, which automatically adjusts burner power and air supply to maintain stable combustion and reduce energy consumption.