scholarly journals Comparative Analysis of Gas Turbine Systems for Pressure Energy Recovery From Blast Furnace Gas

1984 ◽  
Author(s):  
Giuseppe Leo Guizzi
Keyword(s):  
Blast Furnace ◽  
Gas Turbine ◽  
Energy Recovery ◽  
Turbine Unit ◽  
High Capacity ◽  
Integrated System ◽  
Main Process ◽  
Blast Furnace Gas ◽  
Gas Heating ◽  
Water Saturated

Modern high capacity blast furnaces are generally operated at high values of back pressure at the top of the furnace (250÷400 kPa abs.). In order to recover this large quantity of pressure energy some turbine equipments have been recently developed. The possible solutions of these systems must take into account the clean up outcoming blast furnace gas conditions (cold and water saturated gas). Up-to-date solution analysis has carried to three different main process types: wet expansion; dry expansion by partial burning of gas; dry expansion by gas heating in a heat exchanger. This paper develops an energy based analysis for these equipments taking into account not only the recovery in the turbine unit, but also the effect of this equipment on the whole integrated system “blower - cowpers - blast furnace - gas turbine unit - power conversion station”. A parametric analysis is performed and the obtained results are presented and discussed.

Atmospheric Tests of a Full Scale Gas Turbine Burner Fed With Blast Furnace Gas and Coke Oven Gas

2019 ◽  
Author(s):  
Edoardo Bertolotto ◽  
Alberto Amato ◽  
Li Guoqiang
Keyword(s):  
Blast Furnace ◽  
Natural Gas ◽  
Gas Turbine ◽  
Coke Oven ◽  
Full Scale ◽  
Flame Stability ◽  
Coke Oven Gas ◽  
Stability Range ◽  
Blast Furnace Gas ◽  
Inlet Conditions

Abstract The present paper describes atmospheric experimental tests of a new Ansaldo Energia full scale burner which was designed to burn fuels byproduct of steel making processes (mixtures of Blast-Furnace Gas (BFG) and Coke-Oven Gas (COG)), characterized by very low heating values (LHV∼2–3.5 MJ/kg) and very low stoichiometric air/fuel ratios (∼0.5–1 kg/kg). In particular, flame stability and blow-out margins were assessed for different burner variants and fuel compositions such as pure BFG, blends of BFG with increasing content of COG, and also a synthetic mixture of natural gas, hydrogen and nitrogen (NG/H2/N2). Except for pressure, all burner inlet conditions were simulated as in the actual gas turbine engine. The best performing burner among those tested demonstrated an excellent burning stability behavior over a wide operating range and stably burned pure BFG without any supplementary fuel. Furthermore, considering that in most operating concepts gas turbine engines for Ultra-Low BTU applications require a back-up fuel (such as oil, propane or natural gas) to ignite and ramp up or to perform load-rejections, the present atmospheric tests also assessed maneuvers to switch from natural gas operation to syngas operation. Also in this type of dual-fuel operation the burner demonstrated a wide flame stability range.

Repowering in Steel Works by Introducing a Blast-Furnace, Gas-Firing Gas Turbine

1984 ◽  
Vol 106 (4) ◽  
pp. 806-811 ◽  
Author(s):  
A. Muyama ◽  
H. Hiura ◽  
K. Morimoto
Keyword(s):  
Blast Furnace ◽  
Gas Turbine ◽  
Field Tests ◽  
Calorific Value ◽  
Efficiency Improvement ◽  
Plant Design ◽  
Blast Furnace Gas ◽  
Steam Plant ◽  
Plant Efficiency ◽  
Steel Works

A 14-MW, high-temperature gas turbine firing extremely low-BTU, blast-furnace gas was developed and installed in a steel works of Japan as a repowering unit. Field tests proved the stable combustion up to 590 Kcal/Nm3 calorific value and plant efficiency improvement of up to 60 percent on existing steam plant. Design features and two years operational experiences are presented.

Determination of the Optimal Structure of Repowering a Metallurgical CHP Plant Fired with Technological Fuel Gases

2014 ◽  
Vol 59 (1) ◽  
pp. 105-116 ◽  
Author(s):  
A. Ziebik ◽  
M. Warzyc ◽  
P. Gładysz
Keyword(s):  
Blast Furnace ◽  
Gas Turbine ◽  
Input Data ◽  
Coke Oven ◽  
Combined Cycle ◽  
Chemical Energy ◽  
Optimal Structure ◽  
Hard Coal ◽  
Average Value ◽  
Blast Furnace Gas

Abstract CHP plants in ironworks are traditionally fired with low-calorific technological fuel gases and hard coal. Among metallurgical fuel gases blast-furnace gas (BFG) dominates. Minor shares of gaseous fuels are converter gas (LDG) and surpluses of coke-oven gas (COG). Metallurgical CHP plant repowering consists in adding a gas turbine to the existing traditional steam CHP plant. It has been assumed that the existing steam turbine and parts of double-fuel steam boilers can be used in modernized CHP plants. Such a system can be applied parallelly with the existing steam cycle, increasing the efficiency of utilizing the metallurgical fuel gases. The paper presents a method and the final results of analyzing the repowering of an existing metallurgical CHP plant fired with low-calorific technological fuel gases mixed with hard coal. The introduction of a gas turbine cycle results in a better effectiveness of the utilization of metallurgical fuel gases. Due to the probabilistic character of the input data (e.g. the duration curve of availability of the chemical energy of blast-furnace gas for CHP plant, the duration curve of ambient temperature) the Monte Carlo method has been applied in order to choose the optimal structure of the gas-and-steam combined cycle CHP unit, using the Gate Cycle software. In order to simplify the optimizing calculation, the described analysis has also been performed basing on the average value of availability of the chemical energy of blast-furnace gas. The fundamental values of optimization differ only slightly from the results of the probabilistic model. The results obtained by means of probabilistic and average input data have been compared using new information and a model applying average input data. The new software Thermoflex has been used. The comparison confirmed that in the choice of the power rating of the gas turbine based on both computer programs the results are similar.

Operating Experience of Ansaldo V94.2 K Gas Turbine Fed by Steelworks Gas

2002 ◽  
Author(s):  
Federico Bonzani ◽  
Giacomo Pollarolo ◽  
Franco Rocca
Keyword(s):  
Blast Furnace ◽  
Natural Gas ◽  
Gas Turbine ◽  
Operating Experience ◽  
Coke Oven ◽  
Operating Conditions ◽  
Total Power ◽  
Dual Fuel ◽  
Coke Oven Gas ◽  
Blast Furnace Gas

ANSALDO ENERGIA S.p.A. has been commissioned by ELETTRA GLT S.p.A, a company located in Trieste, Italy for the realisation of a combined cycle plant where all the main components (gas turbine, steam turbine, generator and heat recovery steam generator) are provided by ANSALDO ENERGIA. The total power output of the plant is 180 MW. The gas turbine is a V94.2 K model gas turbine dual fuel (natural gas and steelworks process gas), where the fuel used as main fuel is composed by a mixture of natural gas, blast furnace gas and coke oven gas in variable proportions according to the different working conditions of the steel work plant. The main features adopted to burn such a kind of variability of fuels are reported below: • fuel as by product of steel making factory gas (coke oven gas “COG”, blast furnace gas “BFG”) with natural gas integration; • modified compressor from standard V94.2, since no air extraction is foreseen; • dual fuel burner realised based on Siemens design. This paper describes the operating experience achieved on the gas turbine, focusing on the main critical aspect to be overcome and on to the test results during the commissioning and the early operating phase. The successful performances carried out have been showing a high flexibility in burning with stable combustion a very different fuel compositions with low emissions measured all operating conditions.

scholarly journals Measurements on a Blast-Furnace-Gas and Oil-Fired Combustion Chamber of a 17.25-MWe Closed-Cycle Gas Turbine Plant

1970 ◽  
Author(s):  
K. Bammert ◽  
H. Rehwinkel
Keyword(s):  
Blast Furnace ◽  
Combustion Chamber ◽  
Gas Turbine ◽  
Gas Turbines ◽  
Fuel Oil ◽  
Test Results ◽  
Closed Cycle ◽  
Combustion Chambers ◽  
Blast Furnace Gas ◽  
Stage Of Development

The paper discusses the present stage of development of combustion chambers for fossil-fired closed-cycle gas turbines, describing West Germany’s “Gelsenkirchen” plant which can be operated with blast-furnace gas and fuel oil with any desired ratio of gas to oil. The output data and the efficiency of this plant are illustrated by test results. In the development and construction of fossil-fired closed-cycle gas turbine plants, the gas heater presents the greatest difficulties and is the most expensive part of the plant. Therefore, very detailed measurements were taken to determine the total heat absorption in the combustion chamber and its local distribution over the length of the chamber. The results obtained are compared with previous measurements at a smaller plant, the mine-gas and pulverized-coal fired “Haus Aden” plant.

Three Years’ Operating Experience With 7500-kw Gas-Turbine Plants in Belgian Steelworks

1960 ◽  
Author(s):  
E. Aguet ◽  
J. von Salis
Keyword(s):  
Blast Furnace ◽  
Electric Power ◽  
Gas Turbine ◽  
Steel Industry ◽  
Gas Turbines ◽  
Operating Experience ◽  
Point Of View ◽  
Blast Furnace Gas ◽  
Commercial Operation

Gas turbines are being used in increasing numbers in the European steel industry, utilizing as fuel blast-furnace gas, and producing either electric power or blast-furnace wind; in some cases both combined. It is now possible to put on record results obtained with these machines in commercial operation, as some of the units have been running practically nonstop for several years. Apart from teething troubles during the first few thousand running hours, the gas turbine has fulfilled all expectations, both regarding the economics of operation and from the maintenance point of view.

scholarly journals Experiments With a Gas Turbine Model Combustor Firing Blast-Furnace Gas

1996 ◽  
Author(s):  
Yansong Liu ◽  
Jürg Schmidli
Keyword(s):  
Blast Furnace ◽  
Gas Turbine ◽  
Chemical Kinetics ◽  
Flame Temperature ◽  
Scale Model ◽  
Diffusion Type ◽  
Stability Range ◽  
Blast Furnace Gas ◽  
Slow Kinetics ◽  
Inlet Conditions

On-site atmospheric experiments using a one-fifth-scale model combustor of the ABB gas turbine type 11N2-LBtu have been recently carried out at the Kawasaki Steel Works in Mizushima, Japan. A diffusion type burner of special design was used to match the extremely low heating value (2360 kJ/kg) and the high stoichiometric fuel/air ratio (1.6 kg/kg) of the Blast-Furnace Gas (BFG). Except for pressure, all burner inlet conditions were simulated as in the actual gas turbine. The burner demonstrated an excellent burning stability behaviour over the entire operation range and stably burned pure BFG down to an equivalence ratio of 0.25, without any supplementary fuel. Due to the low adiabatic flame temperature and slow kinetics, approximately 1 ppm NOx was measured in the exhaust gas. The chemical kinetics of NOx production and CO burnout were also calculated using a chemical kinetics code and reasonable agreement with the experimental results was obtained. In dual-fuel operation (BFG with oil, propane, or coke-oven gas) the burner also demonstrated a wide flame stability range.

New Gas Turbines for the Steel Industry

1958 ◽  
Author(s):  
Z. Stanley Stys
Keyword(s):  
Blast Furnace ◽  
Gas Turbine ◽  
Steel Industry ◽  
Gas Turbines ◽  
Operating Experience ◽  
Blast Furnace Gas ◽  
New Type ◽  
Historic Development ◽  
And Performance

Applications of the gas turbine in the steel industry appear attractive. Several of these units have been in operation for many years and performance and considerable operating experience already have been gained. A new type of unit has been developed based on these experiences considering newest advances in the art of engineering of a gas turbine. The historic development and layout as well as the various governing aspects of these units burning blast-furnace gas and built for use in the steel industry are described.

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