Abstract: A system capable of providing a liquid purification process using heat regenerating or recovering via heat exchangers (“HEs”). The system, in one embodiment, includes a first set of thermal conductive channels (“TCC”), a second set of TCC, and a third set of TCC. The first set of TCC configured in a first HE is arranged in cylindrical shape which is able to surround or enclose a boiler. A function of TCC is to guide a liquid flow traveling through an HE. The second set of TCC configured in a second HE guides a second liquid flow traveling through the second HE. The third liquid flow such as a cold water stream, for example, flows through the third set of TCC adjacent to the first set of TCC and extracts heat from the first liquid flow such as hot purified water via TCC.