MEDIUM TO LOW TEMPERATURE PYROLYSIS SYSTEM FOR UPGRADING THE QUALITY OF COAL OR BIOMASS, AND METHOD OF PRODUCING UPGRADED COAL, HIGH CALORIFIC VALUE PYROLYSIS GAS AND TAR OR LIQUEFIED SYNTHETIC OIL BY USING THE SYSTEM

摘要

Disclosed are a medium to low temperature pyrolysis system for upgrading the quality of coal or biomass, and a method of producing upgraded coal, high calorific value pyrolysis gas and tar or liquefied synthetic oil by using the system. The system and method enable effective capture of carbon dioxide. The system includes a medium to low temperature pyrolysis oven which is preferably of a moving bed type, and at least a catalysis-heat carrier-oxygen transfer material regenerator in connection with the medium to low temperature pyrolysis oven, a solid-solid separator and a condenser. In the medium to low temperature pyrolysis oven, raw coal is subjected to medium to low temperature pyrolysis, and upgraded coal, high calorific value pyrolysis gas and gas of tar or liquefied synthetic oil are produced. The gas of tar or liquefied synthetic oil is condensed to become tar or liquefied synthetic oil. In the catalysis-heat carrier-oxygen transfer material regenerator, the saturated spent catalysis-heat carrier-oxygen transfer material is oxidized and regenerated, and is returned to the medium to low temperature pyrolysis oven, thus achieving the regeneration and recycling of the catalysis-heat carrier-oxygen transfer material.