초록 ▼

According to the invention pulverized solid fuel is processed by heating the fuel to a temperature at which thermal decomposition of the fuel begins and subsequently heating the fuel to a temperature at which an intense thermal decomposition of the fuel takes place to form a vapor-and-gas suspension

According to the invention pulverized solid fuel is processed by heating the fuel to a temperature at which thermal decomposition of the fuel begins and subsequently heating the fuel to a temperature at which an intense thermal decomposition of the fuel takes place to form a vapor-and-gas suspension containing pulverized particles, gas, tar vapors and pyrogenic water vapors. The resultant vapor-and-gas suspension is cooled in a chamber by water and/or pyrogenic water to a temperature from 360°to 140°C. at which pulverized solid particles adsorb heavy tar. To obtain the resulting product in the form of a pulp, the vapor-and-gas suspension is cooled for a second time to a temperature from 80°to 20°C. at which the fractures of intermediate and light tars are condensed. Combustion heat of resulting solid matter is higher than that of the product obtained by a conventional method; in addition, it may be conveyed by a water channel. The resulting product in the form of a pulp may be conveyed by a water channel directly to the consumer. When practising the method, such side product as pyrogenic water is utilized which is usually purified prior to disposal.

대표청구항 ▼

A method of heat processing of pulverized solid fuel, which comprises heating the fuel by a substantially oxygen-free gaseous heat carrier in less than one second to a temperature from 300°to 500°C. at which thermal decomposition of the fuel begins, subsequently heating the fuel by a substantially o

A method of heat processing of pulverized solid fuel, which comprises heating the fuel by a substantially oxygen-free gaseous heat carrier in less than one second to a temperature from 300°to 500°C. at which thermal decomposition of the fuel begins, subsequently heating the fuel by a substantially oxygen-free gaseous heat carrier in less than one second to a temperature from 500°to 800°C. at which an intense thermal decomposition of the fuel takes place to form a vapour-and-gas suspension containing solid particles, gas, tar vapours and water vapours, and cooling the resultant vapour-and-gas suspension by direct contact thereof with a coolant to a temperature of 360°-140°C. at which pulverized solid particles adsorb heavy tar, breaking the resultant vapour-and-gas suspension into solid matter and vapour-and-gas mixture to obtain useful liquid products. An apparatus for heat processing of pulverized solid fuel comprising: a first chamber, first feed means for feeding fuel into said first chamber, gas delivery means for delivering a substantially oxygen-free gaseous heat carrier into said first chamber to heat the fuel to a temperature at which thermal decomposition of the fuel begins and first discharge means for discharging the used gaseous heat carrier from said first chamber; a second chamber operatively connected to said first chamber, first conduit means for transfer of the fuel from said first chamber to said second chamber, second gas delivery means for delivering a substantially oxygen-free gaseous heat carrier into said second chamber to heat the fuel to a temperature at which an intensive thermal decomposition of the fuel takes place to form a vapour-and-gas suspension consisting of solid particles, tar vapours, water vapours and gases; a third chamber operatively connected to said second chamber, second conduit means for transfer of vapour-and-gas suspension from said second chamber to said third chamber, spray means for delivering and spraying a coolant within said third chamber to cool the vapour-and-gas suspension to a temperature at which pulverized solid particles adsorb heavy tar, second discharge means for discharging the vapour-and-gas suspension from said third chamber and third discharge means for discharging the resultant solid matter from said third chamber.