| 摘要 |
<p>PURPOSE:To carry out the removal of dust and tar from a coal decomposition gas and recover the waste heat from a high-temperature product gas in the form of steam effectively, by passing the coal decomposition gas through a fluidized bed cooler, a granular bed, a heat exchanger and a tar scrubber in the order mentioned. CONSTITUTION:A coal gas formed in a gasifying furnace 1 is cooled to 400-500 deg.C in a fluidized bed cooler 4, and passed through a conduit 15, a granular bed filter 16 and separated from dust. The separated gas is then passed through a conduit 35 and cooled in a cooler (waste heat boiler) 36. the recovered tar is directly injected into a tar scrubber 44, cooled, scrubbed, and then separated into a gas and a liquid in a cyclone 47. The gas 48 is then fed to the outside of the system, and the recovered tar 49 is fed to a tar pot 50, cooled in a waste heat boiler 54 and recycled through the tar scrubber 44. The outlet temperature of the waste heat boiler 54 is kept at 150 deg.C or above the prevent the adhesion and coagulation of the tar, etc. The medium particles in the cooler 4 are treated in a regenerating furnace 24 and recovered in a hopper 20 for reuse.</p> |
