The utility model provides a vertical heat exchanger, includes the exit of upper and lower tub of case on and, installs casing and the exit on the casing between this upper and lower tub of case, installs the tube bank in the casing, upper and lower tub of case and install the vertical equipment of casing between this the upper and lower tub of case back that becomes one, its center are equipped with the bypass passageway that has a perfect understanding and make upper and lower tub of case and casing become hooped column shape structure, and the installation is restrained in the hooped column shape structure that this casing and bypass passageway constitute. The utility model discloses when realizing that cold and hot fluid conducts heat, can permit the bypass passageway of tertium genus fluid in by vertical heat exchanger to pass through, the tube side hot -fluid can be for gas, liquid, three kind solid states, and gaseous phase and liquid, solid phase crude separation can be realized to the back tube side fluid that conducts heat. The utility model discloses install and effectively to utilize into tower fluid heat, water consumption reduction, make full use of tower inner space, be convenient for maintenance, safe and reliable in the tower.