GASIFICATION FURNACE FOR GENERATING FLAMMABLE FUEL GAS

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A gasification furnace is provided that enables tar generation to be further suppressed.

A gasification furnace 10 generates a flammable gas by, in a reducing layer in an internal space, reducing a fuel which contains a component that would become tar and is supplied to the internal space 10a and combusted, while restricting an air quantity in an oxidizing layer in the internal space 10a. The gasification furnace includes: a thermal decomposition layer present in the internal space 10a and joined to an oxidizing layer, the fuel being retained in the thermal decomposition layer prior to being combusted, and being heated and thermally decomposed in a state in which air is not supplied; and a gas supply section 22 and an air supply section 20 that supply, to a zone at the oxidizing layer side of the thermal decomposition layer, a gas and air for use in combustion to cause the fuel being heated to thermally decompose at a lower temperature than combustion in the oxidizing layer. Air is supplied from the air supply section 20 while a quantity of the air is restricted.

A gasification furnace is provided that enables tar generation to be further suppressed.

A gasification furnace 10 generates a flammable gas by, in a reducing layer in an internal space, reducing a fuel which contains a component that would become tar and is supplied to the internal space 10a and combusted, while restricting an air quantity in an oxidizing layer in the internal space 10a. The gasification furnace includes: a thermal decomposition layer present in the internal space 10a and joined to an oxidizing layer, the fuel being retained in the thermal decomposition layer prior to being combusted, and being heated and thermally decomposed in a state in which air is not supplied; and a gas supply section 22 and an air supply section 20 that supply, to a zone at the oxidizing layer side of the thermal decomposition layer, a gas and air for use in combustion to cause the fuel being heated to thermally decompose at a lower temperature than combustion in the oxidizing layer. Air is supplied from the air supply section 20 while a quantity of the air is restricted.