The invention discloses a technological method and device for semi-
coke production 
wastewater resource utilization. The technological method comprises three steps, namely deep oil-water separation, high-efficiency complexing extraction dephenolization and 
ammonia stilling, to be specific, firstly, separating and recycling a part of 
coal tar from 
wastewater when the 
wastewater passes through an oil partitioning tank, recycling 
coal tar in a precision filter and an oil-water separator in sequence after discharged water passes through a coarse filter; feeding the oil-removed semi-
coke wastewater and an extraction agent into an extraction 
tower for extraction and dephenolization, feeding the extract phase and a 
sodium hydroxide solution into a reverse extraction 
tower for countercurrent contact reverse extraction, feeding an obtained 
sodium phenolate solution into an acidification kettle, and adding 
sulfuric acid for acidification to obtain crude 
phenol; feeding dephenolized wastewater discharged from the bottom of the extraction 
tower into a wastewater heater, feeding into an 
ammonia cyanogen separator to be mixed with hot air from an 
air heater to remove 
ammonia after being heated by fume from the 
air heater, and feeding an ammonia-containing 
mixed gas discharged from the top of the ammonia-
cyanogen separator into an ammonia 
water cooler for cooling to obtain ammonia water. By adopting the method and the device, precious resources such as 
coal tar, 
phenol and ammonia can be recycled from the semi-
coke production wastewater resource, and the biodegradability of the semi-
coke wastewater is improved.