English

Vol. 7 2, 2017 p 94-101

Pages

Article name, authors, abstract and keyword

94-101

Simulation of the oil burning process with the admixture of bottom water in fire-tube boilers

Pavel V. Roslyakov a, Yury V. Proskurin b, Vitaly A. Kozhevnikov c

a National Research University Moscow Power Engineering Institute, 14, Krasnokazarmennaya Str., Moscow, 111250, Russian Federation

b Transneft, 57, Bolshaya Polyanka, Moscow, 119180, Russian Federation

c Pipeline Transport Institute, LLC (Transneft R&D, LLC), 47a, Sevastopolskiy prospect, Moscow, 117186, Russian Federation

https://doi.org/10.28999/2541-9595-2017-7-2-94-101

Abstract: The problem of utilizing the water, contaminated with oil products, is topical for the fuel and energy complex enterprises, engaged in production, refining, and transportation of crude oil and oil products. The use of special cleaning equipment is advisable for large energy and industrial facilities. An alternative form of the contaminated water utilization is its thermal decontamination by means of feeding it into the boiler furnace or hearth in various ways.
The availability of fire-tube boilers at many enterprises of the Transneft system dictates the need to investigate the possibility of thermal utilization of the water contaminated with oil products, in the furnaces of such boilers. The boiler KV-GM-2.0 with the heat power of 2 Mwatt was the object of the study. A supercharged burner, developed at NRU MPEI, was considered as a burner unit for feeding fuel oil.
The numerical studies were carried out with the help of the computer simulation of the processes of fuel oil pulverization, mixing, ignition, and burning out of fuel, as well as formation of nitrogen oxides with the help of ANSYS Fluent computational fluid dynamics software with the account of radiation and convective heat transfer. The analysis of the results of numerical experiments on the joint supply of crude oil and bottom water showed that the thermal decontamination of the contaminated water in fire-tube boilers should be limited by the water consumption of no more than 35% in the fuel volume, taking into account the initial caloric value of the fuel. The main reasons for this are the oil droplets on the fire tube walls, elongation of the combustion process, and increase in the emission of nitrogen oxides. The further increase in the proportion of the contaminated water in the fuel will reduce the stability of the combustion process.
The article considers a model of the crude oil burning process with the admixture of bottom water, describes the development of a flare in the fire-tube boilers, and presents conclusions about the possibility and consequences of using bottom water with an assessment of the composition of waste gases.

Keywords: energy efficiency, bottom water utilization, burner units, hot water boilers, oil products, oil, wastes.

References:
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