| 摘要 |
In accordance with the present invention an apparatus and process are disclosed wherein coal or peat or lignite is first transmitted to a devolatilizer from which tar and fuel gas are removed for transmission to a separator and recovery system, from which by-products are obtained and sulphur-free fuel gas is transmitted to the steam boiler. Char is recirculated between the devolatilizer and a heat generator. In one form of the invention a fraction of the char discharge from the devolatilizer is transmitted to a gasifier for gasification and complete sulphur extraction, and another fraction in readily combustible form is transmitted to the steam boiler for use. In another form of the invention the complete output of the devolatilizer is transmitted to the gasifier wherein a fraction is gasified and another fraction is transmitted to the steam boiler. The proportion of the fractions may be controlled to thereby control the overall sulphur emission of the system. |
