Modeliranje posledic izlitja raztopin vodikovega fluorida in natrijevega hidroksida

diplomsko delo univerzitetnega študijskega programa I. stopnje

Urška Brence (Author), Zorka Novak-Pintarič (Mentor), Miloš Bogataj (Co-mentor)

Abstract

V diplomskem delu je opisana uporaba prostodostopnih računalniških programov Evaporation Calculator in ALOHA. Računalniški program Evaporation Calculator smo uporabili za analizo masnega pretoka izhlapevanja vodikovega fluorida. Ugotovili smo, da se masni pretok izhlapevanja vodikovega fluorida povečuje s hitrostjo vetra, koncentracijo raztopine in temperaturo ozračja. Z uporabo računalniškega programa ALOHA smo modelirali kemijsko nesrečo izlitja 70 % fluorovodikove kisline v treh letnih časih. Rezultati so pokazali, da bi bile najhujše posledice kemijske nesreče razlitja HF v poletnem času. Takrat bi bili v smrtni nevarnosti vsi, ki bi bili od mesta nesreče oddaljeni 395 metrov ali manj in bi se tam zadrževali vsaj 60 minut. Ugotovili smo tudi, da se pri 10 minutnem zadrževanju na mestu v bližini kemijske nesreče območje nevarnosti zmanjša na 193 metrov. Negativne učinke na zdravje bi občutili vsi ljudje, ki bi bili od mesta nesreče oddaljeni 2600 metrov ali manj, ne glede na čas zadrževanja na nevarnem območju. Za izdelavo diplomskega dela smo uporabili tudi računalniški program Microsoft Excel, s katerim smo modelirali iztekanje raztopine natrijevega hidroksida iz rezervoarja skozi majhno odprtino. Rezultati so pokazali, da bi se hranilnik izpraznil v 18 minutah in 27 sekundah. Prav tako smo z omenjenim programom modelirali potek nevtralizacije 70 % raztopine vodikovega fluorida s 50 % raztopino natrijevega hidroksida ter izračunali spremembo temperature zmesi, ki je posledica eksotermne reakcije med izbranima kemikalijama.

Keywords

diplomske naloge;izlitje vodikovega fluorida;modeliranje iztekanja;nevtralizacija;eksotermna reakcija;

Data

Language:	Slovenian
Year of publishing:	2020
Typology:	2.11 - Undergraduate Thesis
Organization:	UM FKKT - Faculty of Chemistry and Chemical Engineering
Publisher:	[U. Brence]
UDC:	66.094.8:544:536-21(043.2)
COBISS:	30001667
Views:	434
Downloads:	77
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Modeling of consequences of hydrogen fluoride and sodium hydroxide solutions spillage
Secondary abstract:	The diploma thesis describes the use of free computer programs Evaporation Calculator and ALOHA. The computer program Evaporation Calculator was used to analyze the mass flow rate of the evaporation of hydrogen fluoride. We found that the mass flow rate of hydrogen fluoride evaporation increases with wind speed, solution concentration and atmospheric temperature. Using the computer program ALOHA, we modeled a chemical accident in which 70% hydrofluoric acid leaked in three seasons. The results showed that the worst consequences of a chemical accident would be a hydrofluoric acid leak in summer. At that time, anyone within a radius of 395 meters or less of the accident site and staying there for at least 60 minutes would be in mortal danger. We have also found that a 10-minute stay in a place near a chemical accident would reduce the danger zone to 193 meters. The adverse health effects would be felt by all people who are 2600 meters or less from the scene of the accident, regardless of how long they stay in the danger zone. For our diploma thesis, we also used the computer program Microsoft Excel, with which we modelled the leakage of sodium hydroxide solution from the tank through a small hole. The results showed that our imaginary tank would empty in 18 minutes and 27 seconds. We also used the above mentioned program to model the neutralization process between 70% hydrogen fluoride solution and 50% caustic soda and calculated the temperature change resulting from the exothermic reaction between the selected chemicals.
Secondary keywords:	ALOHA;Evaporation Calculator;hydrogen fluoride spill;modeling of leakage;neutralization;exothermic reaction;
Type (COBISS):	Bachelor thesis/paper
Thesis comment:	Univ. v Mariboru, Fak. za kemijo in kemijsko tehnologijo
Pages:	VIII, 41 str.
ID:	11940772