During the production process of production units of Ammonia, Nitric and Sulfuric acid of the plant, a triple cogeneration is performed.
This means that, besides the production of products by chemical processing (A production), also heat (B production) and mechanical - electrical power (C production) are produced without the use of fuel, but only using waste heat of the waste gases coming from exothermic chemical reactions.
The recovered heat is consumed in the form of high, medium and low-pressure steam, in various production units of the plant, such as the production unit of ammonium nitrate solution, the production unit of Nitrogenous fertilizers or in the units of the neighboring company’s production plant and, finally, in auxiliary services or more general uses.
The mechanical energy of waste gas with an amount of high pressure steam are used in two separate compressors of the nitric acid production unit, saving electricity, while the electricity produced in electric generators which are connected to steam turbines, is consumed in house for electricity needs of other production units of the plant.
With this system, which ensures the recovery of waste heat, HELLAGROLIP SA has saved about 70% of its electricity needs, almost all of the heat required by the various stages of production and, also, large amounts of the necessary mechanical energy, that otherwise should be consumed either by the national electricity network or by using fuel supply. The system of recovery of waste heat is not a steady state situation, but it is constantly in an expanding and improving situation.