| 摘要 |
In the representative leachate treatment system disclosed in the specification, leachate is supplied to a submerged combustion gas evaporator having a downwardly-directed central burner supplying combustion gases through a downcomer to a combustion gas distributor in an evaporation zone. A conical baffle beneath the gas distributor separates the evaporation zone from a quiescent settling zone in a conical bottom of the distributor from which leachate concentrate and sludge are removed. The leachate supplied to the evaporator is preheated by exhaust gases from the evaporator and combustion air supplied to the burner is preheated by leachate concentrate and sludge removed from the evaporator. Landfill gases may be used to fuel the burner and the sludge may be further concentrated and liquid from the concentrator returned to the evaporator. |
