Spiral flow water treatment apparatus

A spiral flow water treatment apparatus comprising:

• a core collector comprising a first portion and a second portion;
• a spacer spirally wound around the core collector;
• a separator spirally wound around the core collector and alternately with the spacer;
• a first spiral flow conduit located outside the separator, includes a first end connected with the first portion and a second end remote from the first portion, and the cross-sectional volume of the first spiral flow conduit decreases between the first and second ends, in the direction of the first end;
• and
• a second spiral flow conduit located within the separator, in fluid communication with the first spiral flow conduit, and connected to the second portion.