摘要:
To provide less expensive and non-polluting coals of which calorific values are increased by improving composition of coals having high moisture content and low fire power, such as peat and lignite, to thereby increase combustion calorie. Materials of coals are heated in a predetermined temperature range in an oxygen-free atmosphere while injecting inactive gas, and elements except for carbon in the atmosphere and in the coals are individually separated by thermal decomposition in the order from an element having a lower decomposition temperature at a temperature of 450 degrees C. or lower so as to obtain upgraded coals. Since the carbon composing the upgraded coals has strong activity, the upgraded coals have quality equivalent or greater than that of the coal of ordinary quality and demonstrate combustion efficiency that has been significantly improved from those of the materials before upgrading.
摘要:
A coal reforming system includes a drying furnace for drying low-grade coal, a carbonizing furnace for carbonizing the dried low-grade coal, hot air generating furnaces for supplying hot air to the drying furnace or the carbonizing furnace, and a carbonizing gas circulation line for supplying a carbonizing gas, which is generated in the carbonizing furnace, as a fuel for the hot air generating furnaces while the temperature thereof is maintained.
摘要:
A coal reforming plant includes: a drying combustor for generating drying combustion gas; a dryer for drying low-grade coal introduced into an inside thereof with the combustion gas from the drying combustor being supplied to the inside thereof; a pyrolysis combustor for generating pyrolysis combustion gas; a pyrolyzer for pyrolyzing dried coal with the combustion gas from the pyrolysis combustor being supplied to an inside thereof; a circulating blower for supplying part of pyrolysis gas and pyrolysis oil in gaseous form generated in the pyrolyzer to the pyrolysis combustor; a cooling tower and the like for cooling the other part of the pyrolysis gas and the pyrolysis oil in gaseous form generated in the pyrolyzer, and thus separating the other part into the pyrolysis gas and the pyrolysis oil in liquid form; a circulating blower for supplying the pyrolysis gas separated from the pyrolysis oil in the cooling tower to the drying combustor; and the like.
摘要:
A two-step method and apparatus, according to the fluidized bed principle, for the production of coke, rich gas and pyrolysis tar, with the object of executing the method in a compact apparatus arrangement, with high energy efficiency and high throughput capacity.This is accomplished by a sequence in which the fine grains removed from the drying vapor mixture are removed from the actual pyrolysis process, and a hot gas, alien to the carbonization, is used as fluidization medium in the pyrolysis reactor, and with a hot gas-high performance separator being used for the dust separation from the pyrolysis gas, with the combustion exhaust gas produced in the combustion chamber being used for the indirect heating of the fluidization medium, for the pre-heating of the gas, which is alien to the carbonization, and for the direct heating in the dryer. The dryer has a double casing in the area of the fluidized bed, and a mixing chamber is arranged directly underneath its initial flow bottom, while the pyrolysis reactor is directly connected to the combustion chamber and the pre-heater.