Simulation of natural-gas combustion in a blast-furnace tuyere

A blast furnace is a reaction vessel in which iron ore is converted to molten iron. High rate pulverized coal injection (PCI) into a blast furnace (BF) is an existing process that is known to decrease the amount of coke in the ironmaking process. Natural gas co-injection with pulverized coal increases the burnout and devolatilization rates of pulverized coal. Also, hydrogen produced from natural gas combustion is a powerful reducing agent of iron (III) oxide, releasing pure iron that trickles down and is eventually removed through the taphole. Due to the inherent complexity of the blast furnace ironmaking process, numerical simulation can prove to be quite difficult. This paper describes a three step methodology for modeling blast furnace combustion, and its application to a furnace in operation at USSC Hamilton Works.

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Research of pressure influence in the gas supply system on the energy consuption level of gas devices

JOURNAL OF HYDROCARBON POWER ENGINEERING ◽

10.31471/2311-1399-2019-2(12)-56-63 ◽

2019 ◽

Vol 6 (2) ◽

pp. 56-63

Author(s):

L. D. Pylypiv ◽

І. І. Maslanych

Keyword(s):

Natural Gas ◽

Residential Buildings ◽

Supply System ◽

Normal Operation ◽

Gas Combustion ◽

Efficient Operation ◽

Gas Consumption ◽

Natural Gas Combustion ◽

Gas Supply

There are investigated the influence of operating pressures in the gas supply system on the level of such energy indicators as efficiency, gas flow and gas overrun by gas equipment in residential buildings. There is established a relationship between the values of operating pressures in the gas supply system and the gas consumption level of household appliances. The causes of insufficient pressure in the gas networks of settlements are analyzed in the article. There is also developed an algorithm for calculating the change in the efficiency of gas appliances depending on the operational parameters of the gas network. It has been found that the most efficient operation of gas appliances is observed at an overpressure at the inlet of gas appliances of about 1200 Pa.To ensure the required quality of natural gas combustion among consumers and minimize gas consumption there are justified the following measures in the article: coordinating a domestic regulatory framework for assessing the quality of natural gas with international norms and standards; improving the preparation of gas coming from local wells before supplying it to gas distribution networks; auditing low pressure gas pipelines and reconstructing areas affected by corrosion; ensuring standard gas pressure in the network for the normal operation of domestic gas appliances; stating quality indicators of natural gas combustion by gas sales organizations.

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Development of environment-friendly dual fuel pulverized coal-natural gas combustion technology for the co-firing power plant boiler: Experimental and numerical analysis

Energy ◽

10.1016/j.energy.2021.120550 ◽

2021 ◽

Vol 228 ◽

pp. 120550

Author(s):

Iman Rahimipetroudi ◽

Kashif Rashid ◽

Je Bok Yang ◽

Sang Keun Dong

Keyword(s):

Numerical Analysis ◽

Power Plant ◽

Natural Gas ◽

Dual Fuel ◽

Environment Friendly ◽

Gas Combustion ◽

Power Plant Boiler ◽

Combustion Technology ◽

Natural Gas Combustion ◽

Plant Boiler

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The effect of nitrogen content in oxy-natural gas combustion on the CO concentration in premixed flame

Journal of the Energy Institute ◽

10.1016/j.joei.2015.11.003 ◽

2017 ◽

Vol 90 (1) ◽

pp. 21-29 ◽

Cited By ~ 1

Author(s):

Wojciech Jerzak

Keyword(s):

Natural Gas ◽

Nitrogen Content ◽

Premixed Flame ◽

Gas Combustion ◽

Co Concentration ◽

Natural Gas Combustion

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Multiflame Patterns in Swirl-Driven Partially Premixed Natural Gas Combustion

Journal of Engineering for Gas Turbines and Power ◽

10.1115/1.1520159 ◽

2002 ◽

Vol 125 (1) ◽

pp. 40-45 ◽

Cited By ~ 5

Author(s):

K. P. Vanoverberghe ◽

E. V. Van den Bulck ◽

M. J. Tummers ◽

W. A. Hu¨bner

Keyword(s):

Natural Gas ◽

Combustion Chamber ◽

Gas Flow ◽

State Transition ◽

Gas Combustion ◽

Bifurcation Phenomena ◽

Major Species ◽

Partially Premixed ◽

Natural Gas Combustion ◽

Low Nox Emission

Five different flame states are identified in a compact combustion chamber that is fired by a 30 kW swirl-stabilized partially premixed natural gas burner working at atmospheric pressure. These flame states include a nozzle-attached tulip shaped flame, a nonattached torroidal-ring shaped flame (SSF) suitable for very low NOx emission in a gas turbine combustor and a Coanda flame (CSF) that clings to the bottom wall of the combustion chamber. Flame state transition is generated by changing the swirl number and by premixing the combustion air with 70% of the natural gas flow. The flame state transition pathways reveal strong hysteresis and bifurcation phenomena. The paper also presents major species concentrations, temperature and velocity profiles of the lifted flame state and the Coanda flame and discusses the mechanisms of flame transition and stabilization.

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