Multi-compartment phae separation tank for multiple reductant injectors

A cooling system in an aftertreatment unit for a multi-cylinder internal combustion engine, the aftertreatment unit including a selective catalyst reduction (SCR) module, an exhaust conduit portion connected upstream to the SCR module, and a plurality of reductant injectors in proximity to the exhaust conduit portion, wherein the plurality of reductant injectors is configured to inject a reductant fluid into the exhaust conduit portion, each reductant injector having an injector coolant outlet, the cooling system comprising:

• a coolant circuit having:
• a coolant reservoir;
• at least one coolant pump to circulate a coolant through the coolant circuit and facilitate a coolant flow from the coolant reservoir to the plurality of reductant injectors, and back to the coolant reservoir;
• a phase separation tank, positioned downstream of the plurality of reductant injectors, at a higher gravitational potential in relation to the plurality of reductant injectors, the phase separation tank including:
• a plurality of compartments, each compartment having at least one inlet portion and at least one outlet portion, wherein each inlet portion being in fluid communication to at least one of the injector coolant outlet and each outlet portion being in fluid communication with the coolant reservoir;
• a coolant anti-siphon line portion, facilitating the fluid communication between the plurality of reductant injectors and the phase separation tank;
• and
• a coolant vent line, facilitating the fluid communication between the phase separation tank and the coolant reservoir.