Flat-Bed Cremator

The special construction of the H.R. Heinicke - the flat-bed cremator - consists of a furnace slide door, a cremation chamber (primary combustion chamber), an afterburning chamber (secondary combustion chamber), a cease-burning chamber and as well an ash cooling zone. The mentioned areas of the oven are completely produced by using materials of high quality, mass-produced fire-bricks and insulating materials including the necessary specially shaped bricks. The material qualities are selected according to the different thermal, chemical as well as mechanical requirements.

The material selection is based upon the H.R. Heinicke know-how resulting from more than one hundred designed and implemented facilities which are operating successfully.

The main burning chamber and the afterburning chamber located upon each other represent a compact construction with an optimum heat exchange between the combustion chambers. The result is a very short preheating time and extremely low primary energy consumption with the advantage that no preheating of the combustion air is necessary. The supply of the combustion air is effected by means of a combustion air blower with the result of lower investments and saving of maintenance costs as well as electrical energy consumption above all.

Alternately, three burners operating with oil, gas or diesel ensure the supply of additional energy in the main burning chamber, afterburning chamber and cease-burning chamber if necessary.

According to our experiences the operation of the burner will be only necessary in the beginning of the cremation for preheating the whole furnace system. During the cremation the temperature is normally released by the combustion of the coffin and the body which are sufficient for an independent combustion. Only in the end of the cremation process it may be necessary that especially the afterburner readjusts the temperature to a value of 850 °C in the afterburning zone. This value is required by the current regulations.

The cremation process will be controlled by Direct Digital Control (DDC) to guarantee secure operations. Measurements of temperature and oxygen in co-operation with the combustion air and the burning system ensures that optimum combustion conditions will be achieved at any time.

In a flat bed furnace the body remains on the floor of the primary combustion chamber during the whole cremation process. Thus the carrying of ash particles within the flue gas will be minimized.

After the combustion is nearly completed only the residues of the incineration will be fed into the cease-burning chamber and thereafter into the cooling zone.

H.R. Heinicke´s latest development, the coffin insertion and ashes-removal system ensures

  • the movement of coffins adapted to all usual shapes of coffins and their prompt insertion into the primary combustion chamber.
  • the complete sweeping of ashes into the cease-burning chamber in view of careful treatment of the combustion chamber floor and comfortable handling.
  • fast operation to minimize the cooling of the furnace to avoid the inlet of cold air.

The design of the machine corresponds to the expected mechanical and thermal charges (coffin weights up to 300 kg). Safety directed control of the machine is achieved by directed link with the furnace. The machine consists of a robust steel construction which is located in starting position in a pit in front of the flat-bed cremator in the coffin insertion zone. The supporting beams of the coffin insertion machine are in flush with the floor.

The insertion machine developed by H.R. Heinicke complies with the intended targets in every respect.