Device and allothermic process for producing a burnable gas from refuse or from refuse together with coal

A device for producing a flue gas from refuse, the device comprising:

• allothermal low-temperature gas generator means for producing a carbonization gas and a carbonization residue from refuse in the absence of oxygen, said gas generator means including heat exchanger means for supplying necessary process heat;
• allothermal crude gas generator means for receiving said carbonization gas and carbonization residue and for producing a crude gas and a gasification residue from both said carbonization residue and carbonization gas in the absence of oxygen with water, in the form of process steam, as a gasification medium;
• gasification residue combustion chamber means for receiving the gasification residue from the crude gas generator means and for producing flue gas from said gasification residue;
• crude gas heat exchanger means for receiving the crude gas from the crude gas generator and for transmitting sensible heat of the crude gas to the low temperature gas generator means and to the process steam;
• and heat exchanger means for receiving the flue gas from the gasification residue combustion chamber and for transmitting sensible heat of the flue gas to the process steam.

A method for producing from refuse in combination with coal, a fuel gas suitable for public utility purposes, said method comprising the steps of:

• producing a carbonization gas and a carbonization residue from refuse in an externally heated low-temperature gas generator in the absence of oxygen and without any carbonization media;
• grinding the carbonization residue with the addition of a desired quantity of coal to a fine-grained dust;
• producing a crude gas and a gasification residue from both the carbonization gas and the dust in an externally heated crude gas generator, in the absence of oxygen, with water, in the form of process steam, as a gasification medium, the sensible heat of the crude gas being used for heating the low-temperature gas generator and for superheating the process steam produced from the water;
• producing a pure gas from the crude gas by purification;
• and
• producing a flue gas from the gasification residue in a gasification residue combustion chamber, wherein the sensible heat of the flue gas is used for superheating the process steam.