The lines are coupled by {HEAD ~ pipelines}, each having a valve, installed after {TAIL ~ the solid liquid separation step} for sending a liquid from the solid liquid separation step to the neutralization step in each line and after the sulfurization step for sending a liquid from the sulfurization step to the detoxification step in each line 
The lines are coupled by { HEAD ~ pipelines } , each having a valve , installed after { TAIL ~ the solid liquid separation step } for sending a liquid from the solid liquid separation step to the neutralization step in each line and after the sulfurization step for sending a liquid from the sulfurization step to the detoxification step in each line
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH