| 摘要 |
The invention relates to the fuel chemical technology, in particular to processes for processing of carboniferous raw material, including of domestic waste, by pyrolysis and gasification of the raw material organic component, and can be applied in the chemical, fuel and power industries. The process for thermochemical processing of carboniferous raw material is realized in a mine-type reactor, the bottom-most part of which can be expanded. In the processing process the raw material is loaded into a hermetic drying chamber, after that the raw material is reloaded into the reactor with the formation of a gas-permeable raw material column. It is initiated burning of raw material in the bottom-most part of the reactor, wherein the raw material consecutively reaches the heating-finish drying, pyrolysis, coking (semicoking), burning-gasification, cooling zones. By feeding of oxygen-containing agent û air and water vapours in the cooling zone it is established a steam and gas flow through the raw material. From the upper part of the reactor it is collected the product-gas, directed to the drying chamber, and from the bottom-most part of the reactor there are removed the processing solid products. By controlling the volume and speed of steam-air blast and/or the volume and speed of product-gas removal, and/or the quantity of the raw material loaded into the reactor it is maintained the temperature in the burning zone of 900à1200?C, in the coking zone of 850à950?C, in the pyrolysis zone of 550à600?C and of the product-gas removed from the reactor of 300à350?C. In the drying chamber the raw material is heated up to the temperature of 200à300?C and it is removed therefrom the product-gas with the temperature of 150à200?C. |
