Abstract: A cooling system is provided having a first heat exchanger for heating a cooling liquid, a second heat exchanger, which preferably comprises an evaporator, for cooling the cooling liquid, and a pump for guiding the cooling liquid through the first and second heat exchanger. The system includes a pellet reactor through which cooling liquid is fed, so as to remove impurities from the cooling liquid by grafting the impurities onto graft material in the pellet reactor. A method is also provided for using such a cooling system. An advantage of the system is especially that calcium salts can be grafted onto the graft material, as a result of which the concentration factor of the cooling system can be increased significantly.

Abstract: A method and apparatus is provided for the condensation of one or more gasses out of a gas stream. The degree of the condensation of volatile compound out of the gas stream A is controlled by regulating the liquid level of the cooling agent in a heat exchanger (8). Preferably a gas stream A from which the volatile compound has been removed is led to a further heat exchanger (1) and is utilized to pre-cool the gas stream A that is still to be treated. In order to be able to control the degree of condensation of volatile compound out of the gas stream A as accurately as possible, the apparatus is provided with an elongated, vertical heat exchanger (8).