Investigation of the Heating Characteristics in a Reheating Furnace with Pulse Combustion

2013 ◽  
Vol 291-294 ◽  
pp. 1834-1838
Author(s):  
Jia Qun Xia ◽  
Hu Ping Li
Keyword(s):  
Heat Balance ◽  
Combustion Products ◽  
Experimental Results ◽  
Flue Gases ◽  
Heating Process ◽  
Operating Parameters ◽  
Theoretical Computation ◽  
Reheating Furnace ◽  
Heat Efficiency ◽  
Pulse Combustion

This paper presents a theoretical and experimental analysis of a pulse combustion in reheating furnace. Measurements of the composition content on flue gases and heat balance tests were carried out for operating parameters in reheating furnace. Experimental results show an intensive and efficient heating process. An attempt was made to perform theoretical computation of composition content in the reheating furnace. Satisfactory agreement between calculations and experimental results was found in certain regions. Discrepancies might be caused by sample of the combustion products which were assumed to be uniform distribution out of the reheating furnace. The results show that the pulse combustion has comparatively large influence upon both combustion and heat efficiency in a reheating furnace.

STUDYING THE PROCESS OF HEATING OF A PIPE BILLET DURING GAS FORMING

2021 ◽  
pp. 156-161
Author(s):  
А.Ю. Боташев ◽  
Р.А. Байрамуков ◽  
Н.У. Бисилов ◽  
Р.С. Малсугенов
Keyword(s):  
Heat Transfer ◽  
Heat Balance ◽  
Heating Temperature ◽  
Fuel Mixture ◽  
Combustion Products ◽  
New Device ◽  
Combustible Gas ◽  
Ferrous Metals ◽  
Non Ferrous Metals ◽  
Propane Butane

Разработана и представлена схема нового устройства, осуществляющего штамповку деталей с нагревом трубной заготовки воздействием продуктов сгорания газообразной топливной смеси. В качестве топливной смеси может использоваться горючий газ - смесь воздуха с метаном или с пропан-бутаном. Представлены результаты исследования процесса нагрева трубной заготовки воздействием продуктов сгорания. Исследование проведено на базе уравнений конвективного теплообмена, теплового баланса и термодинамики. Получена зависимость для определения температуры нагрева трубной заготовки. Установлено, что температура заготовки зависит от материала и геометрических размеров заготовки, а также давления топливной смеси. Данное устройство обеспечивает нагрев до интервала горячей обработки стальных трубных заготовок диаметром более 150 мм при толщине стенки до 1,2…1,5 мм, а при диаметре более 300 мм - толщиной до 2,0…2,5 мм. Для нагрева трубных заготовок из цветных металлов и сплавов (например, алюминия и меди) требуется меньшее давление топливной смеси, чем для стали, благодаря этому обеспечивается нагрев заготовок значительно большей толщины, в частности, заготовок из алюминия толщиной до 6 мм We developed a diagram of a new device for stamping parts by heating a pipe billet by the action of combustion products of a gaseous fuel mixture. A combustible gas can be used as a fuel mixture - a mixture of air with methane or with propane-butane. We present the results of a study of the process of heating a pipe billet by the action of combustion products. We carried out the study on the basis of the equations of convective heat transfer, heat balance and thermodynamics. We obtained the dependence for determining the heating temperature of the pipe billet. We found that the temperature of the workpiece depends on the material and geometric dimensions of the workpiece, as well as the pressure of the fuel mixture. This device provides heating to the hot working interval of steel pipe billets with a diameter of more than 150 mm with a wall thickness of up to 1.2 ... 1.5 mm, and with a diameter of more than 300 mm - with a thickness of up to 2.0 ... 2.5 mm. To heat tubular billets made of non-ferrous metals and alloys (for example, aluminum and copper), a lower pressure of the fuel mixture is required than for steel, due to this, billets of a much greater thickness are heated, in particular, billets made of aluminum with a thickness of up to 6 mm

scholarly journals Predictive Modelling of Wellhead Corrosion due to Operating Conditions: A Field Data Approach

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Chinedu I. Ossai
Keyword(s):  
Corrosion Rate ◽  
Field Data ◽  
Oil And Gas ◽  
Multiple Linear Regression Model ◽  
Predictive Modelling ◽  
Operating Conditions ◽  
Experimental Results ◽  
Operating Parameters ◽  
Oil And Gas Fields ◽  
The Impact

The flow of crude oil, water, and gas from the reservoirs through the wellheads results in its deterioration. This deterioration which is due to the impact of turbulence, corrosion, and erosion significantly reduces the integrity of the wellheads. Effectively managing the wellheads, therefore, requires the knowledge of the extent to which these factors contribute to its degradation. In this paper, the contribution of some operating parameters (temperature, CO2 partial pressure, flow rate, and pH) on the corrosion rate of oil and gas wellheads was studied. Field data from onshore oil and gas fields were analysed with multiple linear regression model to determine the dependency of the corrosion rate on the operating parameters. ANOVA, value test, and multiple regression coefficients were used in the statistical analysis of the results, while in previous experimental results, de Waard-Milliams models and de Waard-Lotz model were used to validate the modelled wellhead corrosion rates. The study shows that the operating parameters contribute to about 26% of the wellhead corrosion rate. The predicted corrosion models also showed a good agreement with the field data and the de Waard-Lotz models but mixed results with the experimental results and the de Waard-Milliams models.

scholarly journals Operating parameters of a passenger vehicle turbocharged spark ignition engine in conditions of exhaust leakage simulation

2018 ◽  
Vol 19 (6) ◽  
pp. 463-467
Author(s):  
Krystian Hennek ◽  
Mariusz Graba
Keyword(s):  
Oxygen Sensor ◽  
Exhaust System ◽  
Combustion Products ◽  
Spark Ignition ◽  
Spark Ignition Engine ◽  
Oxidation Products ◽  
Operating Parameters ◽  
Passenger Vehicle ◽  
Chassis Dynamometer ◽  
Excess Air

Paper discussed the influence of exhaust system leakage on the utility parameters and toxic combustion products emission of a turbocharged passenger car spark ignition engine. A comparative analysis of the data gathered in the research carried out using the MAHA MSR 500 single roller chassis dynamometer was conducted, where the exhaust system was sealed and leaking in the area of the wideband oxygen sensor mounting bracket. The presented data refers to among others: the emissions of harmful gasoline oxidation products (HC, CO), the courses of power generated by the engine and the momentary values of excess air ratio. The EUDC driving cycle was used in the research.

scholarly journals Calculation of temperature and velocity fields in the furnace chambers of tube ovens

2019 ◽  
Vol 124 ◽  
pp. 01019 ◽  
Author(s):  
A. V. Sadykov ◽  
D. B. Vafin
Keyword(s):  
Three Dimensional ◽  
Heating Surface ◽  
Methane Combustion ◽  
Combustion Products ◽  
Heat Fluxes ◽  
Flue Gases ◽  
Temperature Fields ◽  
Combustion Model ◽  
Band Model ◽  
Temperature And Velocity Fields

This paper presents the results of calculations of velocity and temperature fields in the radiation chamber of an energy-intensive technological tubular oven during the combustion of methane in air using acoustic burners of floor flame. The calculation method is based on the joint numerical solution of difference analogs of three-dimensional equations of energy transfer by radiation, convection and turbulent thermal conductivity, the movement of flue gases and the methane combustion model in the air. The radiation selectivity of flue gases is taken into account using a six-band model. The paper contains a diagram showing the organization of a three-dimensional modelling of acoustic burners. It also represents the isotherms of combustion products, the lines of the velocity vectors in the radiation chamber, distributions of surface densities of heat fluxes to the heating surface.

The Effects of Operation Parameters on CO2 Removal Efficiency by Membrane Method

2014 ◽  
Vol 955-959 ◽  
pp. 2326-2329
Author(s):  
Fang Qin Li ◽  
Ji Yong Liu ◽  
Xiao Feng Zhang ◽  
Jian Xing Ren ◽  
Jiang Wu
Keyword(s):  
Removal Efficiency ◽  
Flue Gas ◽  
Gas Flow ◽  
Removal Rate ◽  
Absorption Efficiency ◽  
Flue Gases ◽  
Operating Parameters ◽  
Membrane Contactor ◽  
Solution Flow ◽  
Operation Parameters

On the membrane contactor test unit, chose monoethanolamine (MEA) as absorption solution to absorb CO2 of simulated flue gases, studied effects of operating parameters on CO2 capture. Operating parameters included initial CO2 contents in flue gas, flue gas flow and absorption solution flow. Experimental results showed that: the greater the absorption of fluid flow, the higher the CO2 removal rate;While the greater the flue gas flow or the higher the initial CO2 concentration in flue gas, the lower the CO2 removal rate. In order to study the influence of the regeneration solution on CO2 absorption efficiency, regeneration experiments were done. Since the loss of solvent in regeneration solution, CO2 removal efficiency by regeneration solution was lower than that by original absorption solution.

CFD Analysis of Batch-Type Reheating Furnace With Regeneratve Burners

2008 ◽  
Author(s):  
Bin Wu ◽  
Tom Roesel ◽  
Andrew M. Arnold ◽  
Zhaojiang Xu ◽  
Eugene Arnold ◽  
...  
Keyword(s):  
Product Quality ◽  
Three Dimensional ◽  
Control Process ◽  
Flow Characteristics ◽  
Steel Production ◽  
Value Added ◽  
Heating Process ◽  
Cfd Analysis ◽  
Reheating Furnace ◽  
Quality Control Process

A reheating furnace is a critical component in value-added steel production. These furnaces can have a significant impact on product quality and total cost. Due to the higher efficiency of regenerative burners, a growing number of reheating furnaces are using this technology. To better understand the regenerative burner operation, a Computational Fluid Dynamics (CFD) analysis has been conducted to examine the transient and three dimensional flow characteristics in the No.3 reheating furnace at ArcelorMittal Steelton. Simulation results with traditional burners and regenerative burners have been analyzed to understand the effect of retrofitting a furnace with these more modern burners. The temperature distribution on the billets has also been monitored throughout the simulated heating process providing insight into the optimization of billet residence time and improvement of the product quality control process.

Modeling of Steel Slab Reheating Process in a Walking Beam Reheating Furnace

2016 ◽  
Author(s):  
Guangwu Tang ◽  
Arturo Saavedra ◽  
Tyamo Okosun ◽  
Bin Wu ◽  
Chenn Q. Zhou ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Three Dimensional ◽  
Heat Transfer Model ◽  
Furnace Operation ◽  
Production Data ◽  
Heating Process ◽  
Transfer Model ◽  
Transfer Coefficients ◽  
Reheating Furnace ◽  
Reheating Process

Slab reheating is a very important step in steel product manufacturing. A small improvement in reheating efficiency can translate into big savings to steel mills in terms of fuel consumption and productivity. Computational fluid dynamics (CFD) has been employed in conducting numerical simulations of the slab reheating furnace operation. However, a full industrial scale three-dimensional (3D) simulation of a slab reheating furnace, while comprehensive, is not an efficient way to conduct broad studies of the slab heating process. In this paper, a comprehensive two-dimensional (2D) numerical heat transfer model for slab reheating in a walking beam furnace was developed using the finite difference method. The 2D heat transfer model utilizes the heat transfer coefficients derived from a 3D reheating furnace CFD model which was validated by using mill instrumented slab trials. The 2D heat transfer model is capable of predicting slab temperature evolutions during the reheating processes based on the real time furnace conditions and steel physical properties. The 2D model was validated by using mill instrumented slab trials and production data. Good agreement between the model predictions and production data was obtained.

scholarly journals Capturing CO2 from combustion flue gases with a carbonation calcination loop. Experimental results and process development

2009 ◽  
Vol 1 (1) ◽  
pp. 1147-1154 ◽  
Author(s):  
J.C. Abanades ◽  
M. Alonso ◽  
N. Rodríguez ◽  
B. González ◽  
G. Grasa ◽  
...  
Keyword(s):  
Process Development ◽  
Experimental Results ◽  
Flue Gases

Experimental Study on NOx and CO Emissions of Aviation Kerosene and Coal-to-Liquid Synthetic Aviation Fuel in a Jet Stirred Combustion Reactor

2014 ◽  
Author(s):  
Xin Xue ◽  
Yuzhen Lin ◽  
Chi Zhang ◽  
Ye Tian ◽  
Chih-Jen Sung
Keyword(s):  
Equivalence Ratio ◽  
Alternative Fuels ◽  
Combustion Products ◽  
Experimental Results ◽  
Aviation Fuel ◽  
Recirculation Region ◽  
Inlet Temperature ◽  
Aviation Kerosene ◽  
Synthetic Aviation ◽  
Combustion Reactor

The ever increasing consumption of non-renewable fossil fuels for global economic development leads to serious energy crisis and environmental pollution. Consequently, new alternative fuels and high-efficiency combustion are required to aid the sustainable development of human society. The present paper took the RP-3 aviation kerosene and coal-to-liquid synthetic aviation fuel (manufactured through the Fischer Tropsch process., FT) for object, and experimentally investigated the influences of pressure, inlet temperature and equivalence ratio on the productions of NOx and CO in a jet stirred combustion reactor. The tests were performed under the pressures of 2bar and 3bar, and inlet air temperatures of 550K and 650K, respectively. The equivalence ratio ranged from 0.5 to 1.2. The mean residence time was approximately 8ms. Probe sampling followed by on-line emissions analyzer permitted to measure the concentration of the products. The experimental results show that these two fuels obey the same law with the variations of pressures, inlet temperatures and equivalence ratios. The NOx production increases with the pressure and inlet temperature increasing. The CO decreases with the pressure increasing, while slightly increases with the inlet temperature increasing. Numerical simulations were also performed to investigate the combustion products of these two fuels in the jet stirred combustion reactor. Two PSRs were introduced to simulate the jet flame region and post flame in the recirculation region, respectively. The combustion products of second PSR (PSR2) agreed well with the experimental results by regulating the volume ratio of first PSR (PSR1). Based on the reaction pathway analysis of NO production in present state, it is considered that for these two fuels the NOx production is led by the thermal NO above the equivalence ratio of 0.65, while by the N2O at lower equivalence ratios. With the application of the present alternative fuel and its reaction mechanism, the experimental results of aviation kerosene and Coal-to-Liquid synthetic aviation fuel can be predicted well within a certain state, which requires a further verification in a wider range. Furthermore, the numerical results show that the NO release is insensitive to the reaction components within present experimental states.

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