초록 ▼

A method and apparatus for treating wastes by gasification recovers useful resources including energy, valuables such as metals, and gases for use as synthesis gas for chemical industries or fuel. The wastes are gasified in a fluidized-bed reactor at a relatively low temperature. Gaseous material an

A method and apparatus for treating wastes by gasification recovers useful resources including energy, valuables such as metals, and gases for use as synthesis gas for chemical industries or fuel. The wastes are gasified in a fluidized-bed reactor at a relatively low temperature. Gaseous material and char produced in the fluidized-bed reactor are introduced into a high-temperature combustor, and low calorific gas or medium calorific gas is produced in the high-temperature combustor at a relatively high temperature. The fluidized-bed reactor preferably is a revolving flow-type fluidized-bed reactor. The high-temperature combustor preferably is a swirling-type high-temperature combustor.

대표청구항 ▼

[ What is claimed is:] [1.] A method for treating combustible matter by gasification, said method comprising:supplying said combustible matter into a fluidized-bed reactor;gasifying said combustible matter in said fluidized-bed reactor at a temperature ranging from 450 to 800.degree. C. by contactin

[ What is claimed is:] [1.] A method for treating combustible matter by gasification, said method comprising:supplying said combustible matter into a fluidized-bed reactor;gasifying said combustible matter in said fluidized-bed reactor at a temperature ranging from 450 to 800.degree. C. by contacting said combustible matter with a gasifying agent supplied to said fluidized-bed reactor to produce gas and carbonous material, said carbonous material being crushed into char in a fluidized-bed using sand or alumina as a fluidized medium;introducing said gas and said char produced in said fluidized-bed reactor directly into a high-temperature combustor; andproducing low calorific gas or medium calorific gas in said high-temperature combustor by combusting said gas and said char at a temperature of at least 1300.degree. C. by contacting said gas and said char with gas supplied to said high-temperature combustor, and recovering slag by melting ash content contained in said char.