HCl/diethyl ether + Nitrogen?
HCl is a gas at room temperature and diethyl ether is a low boiler.  Both will have significant vapor pressures and, therefore, exist in the vapor phase above your  solution.  The HCl and diethyl ether in solution will continuously maintain an equilibrium with the vapor phase. As you bubble nitrogen through the system it will continuously sweep the vapor out, removing HCl and diethyl ether.  But since the HCl and diethyl ether in solution continuously maintain an equilibrium in the vapor phase, they will be continuously swept out until all of the HCl and diethyl ether in solution have been removed.