BRITO, Karoline Dantas; BRITO, KAROLINE DANTAS; Brito, K. D.; http://lattes.cnpq.br/0189263188500915; BRITO, Karoline Dantas.
Résumé:
Due to the intrinsic nature of the substances and the products they handle, the chemical
process plants are subject to a range of risks which may often produce irreparable damage to
equipment as well as cause serious injuries or even death to workers and the surrounding
communities outside the boundaries of its facilities. Over the past decades, many chemical,
petrochcmical and oil processing in the world have been facing a history of accidents with
economic, environmental and human impacts often going beyond the limits of its facilities.
As a result, the industries were forced to examine more carefully the effects inside and outside
their walls. It was in this context that we researched the production of chlorine by the
electrolysis of brine. The production of chlorine drags & lot of impurities which must be
eliminated by the process of cooling, drying, compression and then, liquefaction, which will
result in the reduction in volume, making transport to the destination of consumers easier.
Besides compressing the chlorine, the compression areais also responsible for the elimination
of the main impurity that comes along with the chlorine gas throughout its processing: the
nitrogen trichloride, which under certain conditions of temperature, pressure and composition
shows an unstable and explosíve nature. Therefore, this dissertation includes the Chlorine
Compression System from Braskem in Maceió, where this system was simulated in Aspen
Plus and Dynamics environment. We tried to simulate the model in Aspen as close to reality
as possible, reaching safe levels of nitrogen trichloride. Once the model of the compression
system was reached, disturbances were applied in the liquid chlorine and chlorine gas flow
that entered the pre-cooler, in the liquid chlorine How that enters the inter cooler and a tlow
rate of steam circulating in the re-boiler. The dynamic behavior of the temperature and level
of re-boiler were observed and evaluated, as well as the discharge temperatures of the first
and second compression stages. This work made it possible to have a model that represents in
a qualitative way the compression system of chlorine used in Braskem nowadays. Such model
can predict behaviors in situations that may occur in the plant.