Simulacije razbremenitev tlaka v kemijskih procesih

diplomsko delo visokošolskega strokovnega študijskega programa I. stopnje

Saša Rešeta (Author), Zorka Novak-Pintarič (Mentor), Zdravko Kravanja (Co-mentor)

Abstract

Namen diplomske naloge je prikazati različne pristope za dimenzioniranje tlačno razbremenilnih naprav, ki se uporabljajo za zaščito procesov, v katerih obstaja nevarnost porasta tlaka. Prikazane so računske metode ter uporaba računalniškega programa Aspen Hysys. V prvem delu je prikazano računsko dimenzioniranje razbremenilnih ventilov in prelomnih diskov za razbremenitev cisterne z benzenom, ki je izpostavljena toplotnemu viru, ter za razbremenitev črpalke in reaktorja z dušikom. V drugem delu smo s programom Aspen Hysys izvedli dinamično simulacijo razbremenitve v tlačnem procesu ter dimenzioniranje ventila za cisterno z benzenom v primeru parnega in tekočega izpusta. Rezultat dinamične simulacije je časovni potek vrednosti pretoka, tlaka in temperature med razbremenitvijo. Ugotovili smo, da se maksimalni pretok iztekajoče snovi povečuje s povečevanjem premera odprtine, tlaka in temperature. S simulacijo smo dobili dimenzije varnostnega ventila cisterne in jih primerjali z rezultati računskih metod. Ugotovili smo, da je v primeru parne razbremenitve premer razbremenilnega ventila, dobljen z računalniškim programom, zelo blizu izračunani vrednosti. V primeru tekočinske razbremenitve je prišlo do določenih odstopanj, vendar so dobljene vrednosti znotraj istega reda velikosti.

Keywords

tlačna razbremenitev;varnost procesov;dinamična simulacija;Aspen Hysys;dimenzioniranje;

Data

Language:	Slovenian
Year of publishing:	2014
Typology:	2.11 - Undergraduate Thesis
Organization:	UM FKKT - Faculty of Chemistry and Chemical Engineering
Publisher:	[S. Rešeta]
UDC:	66.083(043.2)
COBISS:	18227478
Views:	1242
Downloads:	136
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	SIMULATION OF PRESSURE RELIEF IN CHEMICAL PROCESSES
Secondary abstract:	The purpose of this thesis is to demonstrate different approaches to sizing pressure relief valves that are used for mitigating the overpressure risk within the processes. Various calculating methods are presented as well as the use of the computer program Aspen Hysys. The first part presents a numerical sizing of pressure relief valves and rupture disks of a benzene tank exposed to heat source, and the sizing of the relief devices for a pump and tank with nitrogen. In the second part, the program Aspen Hysys was used for dynamic simulation of pressure relief process, and valve sizing of a tank with benzene assuming vapor and liquid reliefs. The results of dynamic simulation were the time profiles of flow rate, pressure and temperature during a relief process. It was established that the maximum flow rate of the relieving substance increases with increasing orifice area, pressure and temperature. The dimensions of safety valves were obtained by using computer simulation, and compared to those obtained by the numerical methods. We found out that the diameter of the relief valve obtained by the computer program was very close to the calculated value of vapor relief. In the case of the liquid relief some deviations occurred, however, the values obtained were within the same order of magnitude.
Secondary keywords:	pressure relief;process safety;dynamic simulation;Aspen Hysys;sizing;
URN:	URN:SI:UM:
Type (COBISS):	Bachelor thesis/paper
Thesis comment:	Univ. v Mariboru, Fak. za kemijo in kemijsko tehnologijo
Pages:	X, 41 str.
ID:	8729989