Method for cleaning tar-bearing waste water and apparatus for performing said method
AssigneeBabcock & Wilcox Volund APS
InventorThomas Nissen
Life of this patent
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Abstract
In a method and an apparatus for cleaning tar-bearing waste water (17), a mixture of water and hydrocarbons, e.g. comprising polyaromatic hydrocarbons and phenols, the mixture is separated into a low-boiling-point part and a high-boiling-point part, bringing the low-boiling-point part on vapor form in a boiler (1), and the low-boiling-point part is cracked in vapor form at a high temperature in a reactor (2), providing light combustible gases, which can be utilized in e.g. gas engines, gas turbines or the like. Furthermore, the high-boiling-point part may be used for energy supply to the process or other processes or as an alternative be cracked for providing light combustible gases.
Claims11
Method for cleaning tar-bearing waste water, where the waste water is a mixture of water and hydrocarbons, comprising in sequence the steps of:
- a) separating the mixture into a low-boiling-point part and a high-boiling-point part, and then bringing the low-boiling-point part to vapor form,
- b) cracking high molecular hydrocarbons from the low-boiling-point part in vapor form, thereby completely converting the hydrocarbons therein to products that are in vapor form at atmospheric pressure and ambient temperature, which products are light combustible and can be utilized in gas engines, gas turbines or the like,
- c) condensing the water contents of the cracked low-boiling-point part, thus separating the cracked low-boiling-point part into clean water and light combustible hydrocarbons.
Dependencies are inferred from the claim text.