scholarly journals Process Simulation of Oxy-Fuel Combustion for A 120 MW Coal-Fired Power Plant Using Aspen Plus

2021 ◽  
Vol 9 (1) ◽  
pp. 26-38
Author(s):  
Odeh A.O ◽  
Okpaire L.A ◽  
Oyedoh E.A
Keyword(s):  
Power Plant ◽  
Flue Gas ◽  
Process Simulation ◽  
Flame Temperature ◽  
Aspen Plus ◽  
Fuel Combustion ◽  
Nox Emissions ◽  
Input Output ◽  
Boiler Efficiency ◽  
Direct Input

Oxy-fuel Combustion is a technology with the potential of drastically reducing the amount of CO2 emission, it relies on the use of oxygen and recycled CO2 instead of air as the oxidant. This helps to reduce the amount of the CO2 and NOx emissions. This study focuses on the components of flue gas produced and their amounts for oxy-fuel combustion in a coal-fired power plant (CFPP) and also the boiler efficiency using the direct (input-output) method. The combustion process of pulverized coal in a 120MW power plant is studied using Aspen Plus 11. The amount of each component in flue gas in coal-fired processes with air or O2/ CO2 (using recycle of 20%, 40%, 60% and 80% of CO2) as oxidizer was obtained. From the process simulation, as the recycle % of CO2 was increased, the flame temperature, CO and NOx emissions were reduced. The simulation results of air combustion were compared with that of oxy-fuel combustion with 80% recycle and it was seen that the flame temperature dropped from 1894oC when air was used as oxidizer to 1679oC for oxy-fuel combustion with 80% recycle. Also, there was a reduction in the amount of NOx produced, but the SOx levels were constant for both combustion processes. The Gross Calorific Value (GCV) of the coal was calculated from its Proximate Analysis using Dulong’s formula and it was used to estimate the Boiler Efficiency using the Direct (Input-Output) method and a value of 83.6% was obtained.

Process simulation of oxy-fuel combustion for a 300MW pulverized coal-fired power plant using Aspen Plus

2013 ◽  
Vol 76 ◽  
pp. 581-587 ◽  
Author(s):  
Xiaohui Pei ◽  
Boshu He ◽  
Linbo Yan ◽  
Chaojun Wang ◽  
Weining Song ◽  
...  
Keyword(s):  
Power Plant ◽  
Process Simulation ◽  
Aspen Plus ◽  
Fuel Combustion ◽  
Pulverized Coal

scholarly journals ANALISIS KINERJA BOILER PEMBANGKIT LISTRIK TENAGA UAP ASAM ASAM UNIT II – KALIMANTAN SELATAN

JTAM ROTARY ◽  
2020 ◽  
Vol 2 (1) ◽  
pp. 109
Author(s):  
Asep Mohamad ◽  
Rachmat Subagyo
Keyword(s):  
Power Plant ◽  
Heat Loss ◽  
Flue Gas ◽  
Performance Test ◽  
Heat Losses ◽  
Steam Power ◽  
Boiler Efficiency ◽  
Calculation Results ◽  
Current Value ◽  
Loss Method

Penelitian ini bertujuan untuk mengetahui nilai efisiensi boiler komisioning dibandingkan dengan nilai saat ini dan untuk mengetahui penyebab penurunan efisiensi pada Unit 2 Boiler Asam PLTU. Penelitian ini dimulai dengan mengumpulkan data Uji Kinerja selama commissioning dan data empat tahun saat ini dari 2014 hingga 2018. Selanjutnya, kehilangan panas yang dilakukan dihitung dan dibandingkan. Perhitungan dilakukan menggunakan ASME PTC 4-2008 Metode Kehilangan Panas Standar. Berdasarkan hasil perhitungan, dapat disimpulkan bahwa nilai Efisiensi Boiler base HHV tertinggi di Unit 2 PLTU Asam Asam adalah 86,23% pada Commissioning dan nilai Efisiensi Boiler Base HHV tertinggi kedua adalah 84,42% pada 9 Agustus 2017, sementara Efisiensi Boiler pangkalan HHV terendah adalah 82,12% pada 2 Oktober 2014. Kehilangan panas yang paling mempengaruhi efisiensi Boiler Unit 2 adalah Kehilangan Panas karena Panas dalam Gas Buang Kering (5,79% - 7,96%), Kehilangan Panas karena Kelembaban dalam Bahan Bakar (4,07% - 5,57)%) dan Kehilangan Panas karena Kelembaban dari Pembakaran Hidrogen dalam Bahan Bakar (3,85% - 5,04%). This study aims to determine the value of commissioning boiler efficiency compared with current value and to know the causes of efficiency decrease in Unit 2 Boiler of Asam Asam Coal Fired Steam Power Plant. This research begins with collecting data of Performance Test during commissioning and current four years data from 2014 until 2018. Furthermore, heat losses that carried out are calculated and compared. Calculations performed using ASME PTC 4-2008 Standard Heat Loss Method. Based on the calculation results, it can be conclude that the highest HHV base Boiler Efficiency value in Unit 2 of Asam Asam Power Plant is 86.23% at Commissioning and the second highest HHV Base Boiler Efficiency value is 84.42% on August 9, 2017, while the lowest HHV base Boiler Efficiency is 82.12% on October 2, 2014. Heat loss that most affects the efficiency of Unit 2 Boiler is Heat Loss due to Heat in Dry Flue Gas (5.79% - 7.96%), Heat Loss due to Moisture in Fuel (4.07% - 5.57) %) and the Heat Loss due to Moisture from Burning of Hydrogen in Fuel (3.85% - 5.04%).

scholarly journals Analysis of the cumulative exergy consumption of an integrated oxy-fuel combustion power plant

2013 ◽  
Vol 34 (3) ◽  
pp. 105-122 ◽  
Author(s):  
Andrzej Ziębik ◽  
Paweł Gładysz
Keyword(s):  
Energy Consumption ◽  
Power Plant ◽  
A Priori ◽  
Fuel Combustion ◽  
Balance Model ◽  
Input Output ◽  
Balance Equations ◽  
Direct Energy ◽  
Exergy Consumption ◽  
By Products

Abstract In order to analyze the cumulative exergy consumption of an integrated oxy-fuel combustion power plant the method of balance equations was applied based on the principle that the cumulative exergy consumption charging the products of this process equals the sum of cumulative exergy consumption charging the substrates. The set of balance equations of the cumulative exergy consumption bases on the ‘input-output method’ of the direct energy consumption. In the structure of the balance we distinguished main products (e.g. electricity), by-products (e.g. nitrogen) and external supplies (fuels). In the balance model of cumulative exergy consumption it has been assumed that the cumulative exergy consumption charging the supplies from outside is a quantity known a priori resulting from the analysis of cumulative exergy consumption concerning the economy of the whole country. The byproducts are charged by the cumulative exergy consumption resulting from the principle of a replaced process. The cumulative exergy consumption of the main products is the final quantity.

scholarly journals Modelling of Mercury Emissions from Large Solid Fuel Combustion and Biomonitoring in CZ-PL Border Region

2016 ◽  
Vol 23 (4) ◽  
pp. 593-604 ◽  
Author(s):  
Jan Kříž ◽  
Jan Loskot ◽  
Vladimír Štěpánek ◽  
Lidmila Hyšplerová ◽  
Daniel Jezbera ◽  
...  
Keyword(s):  
Power Plant ◽  
Solid Fuel ◽  
Flue Gas ◽  
Fuel Combustion ◽  
Border Region ◽  
Coal Power Plant ◽  
Mercury Emissions ◽  
Solid Fuel Combustion ◽  
Coal Power

Abstract Tightening of norms for air protection leads to a development of new and significantly more effective techniques for removing particulate matter, SOx and NOx from flue gas which originates from large solid fuel combustion. Recently, it has been found that combinations of these environmental technologies can also lead to the reduction of mercury emissions from coal power plants. Now the greatest attention is paid especially to the coal power plant in Opatovice nad Labem, close to Hradec Kralove. Its system for flue gas dedusting was replaced by a modern type of cloth fabric filter with the highest particle separation efficiency which belongs to the category of BAT. Using this technology, together with modernization of the desulphurisation device and increasing of nitrogen oxides removal efficiency, leads also to a reduction of mercury emissions from this power plant. The University of Hradec Kralove, the Opole University and EMPLA Hradec Kralove successfully cooperate in the field of toxic metals biomonitoring almost 20 years. In the Czech-Polish border region, comprehensive biomonitoring of mercury in bioindicators Xerocomus badius in 9 long-term monitored reference points is done. The values of mercury concentration measured in 2012 and 2016 were compared with values computed by a dispersion model SYMOS′97 (updated 2014). Thanks to modern methods of dedusting and desulphurisation, emissions of mercury from this large coal power plant are now smaller than before and that the downward trends continues. The results indicate that Xerocomus badius is a suitable bioindicator for a long-term monitoring of changes in mercury imissions in this forested border region. This finding is significant because it shows that this region is suitable for leisure, recreation, and rehabilitation.

Simulation on Flue Gas Pretreatment of Carbon Dioxide Capture Based on Aspen Plus Software

2014 ◽  
Vol 675-677 ◽  
pp. 563-567
Author(s):  
Tai Lv ◽  
Li Meng Liu
Keyword(s):  
Carbon Dioxide ◽  
Power Plant ◽  
Flue Gas ◽  
Carbon Dioxide Capture ◽  
System Simulation ◽  
Aspen Plus ◽  
Temperature Influence ◽  
Layer Height ◽  
Packing Layer

Using process software Aspen Plus of coal-fired power plant carbon dioxide capture flue gas pretreatment system simulation, studied the flue gas quantity、packing layer height、absorbent in quantity and absorbent in temperature, influence on the content of SO2 and cooling in the flue gas outlet. The results showed that the content of SO2 and temperature in the flue gas outlet, increase with increasing the flue gas quantity, decrease with increasing the packing layer height and absorbent quantity, increase with the rising of absorbent temperature.

Advanced Power Plant Concept With Application of Exhaust CO2 to Liquid Fuel Production

2017 ◽  
Author(s):  
B. Chudnovsky ◽  
L. Levin ◽  
A. Talanker ◽  
A. Kunin ◽  
J. Cohen ◽  
...  
Keyword(s):  
Power Generation ◽  
Power Plant ◽  
Flue Gas ◽  
Electricity Generation ◽  
Liquid Fuel ◽  
Power Plants ◽  
Fuel Combustion ◽  
Co2 Conversion ◽  
Fuel Production ◽  
Generation Plant

Today there is a growing concern about the ramifications of global warming resulting from the use of fossil fuels and the associated carbon dioxide emissions. Oxy-fuel combustion is a promising response to this issue, since the product of the combustion is a CO2 rich flue gas, which requires no further separation from other emission gases and thus can be sequestrated, or utilized. Here we present an analysis of a novel technology for combining oxy-fuel combustion with utilization of the CO2 rich flue gas for syntetic fuel production. The technology concept involves a new method of using concentrated solar energy for the dissociation of carbon dioxide (CO2) to carbon monoxide (CO) and oxygen (O2). Simultaneously, the same device can dissociate water (H2O) to hydrogen (H2) and oxygen (O2). The CO, or the mixture of CO and H2 (called Syngas), can then be used as a gaseous fuel (e.g. in power plants), or converted to a liquid fuel (e.g. methanol), which is relatively easy to store and transport, and can be used in motor vehicles and electricity generation facilities. The oxygen produced in the process can be used in oxy-fuel combustion or other advanced combustion methods in power plants. In this study it is assumed that a typical sub-critical, 575 MW, coal firing power plant is converted to oxy-fuel combustion. The flue gases from that power plant are then used as raw material for fuel production. The aim of the study is to estimate the optimal conceptual design of a power generation plant, including liquid/gaseous fuel generation facility. In the present study we used a series of special models for simulating the heat balance, heat transfer, performance and emissions of an oxy-fuel converted utility boiler. We also employed cycle simulation software that facilitates the optimization of an electricity generation plant with CO2 conversion to liquid fuel and usage of the fuel produced from CO2 for additional electricity production. The simulation results show that the amount of fuel produced, additional power generated and power station self consumption may be changed over a wide range, depending on the size of the solar field, which provides the energy for the liquid fuel production. The paper includes an overview of some of the key technical considerations of the new concept of CO2 conversion to fuel. Based on the obtained results it may be concluded that the methodology presented in this study is an attractive option for CO2 emission reduction, which can be implemented in existing and/or new power generation units. The technology proposed in this paper is not indented as an alternative for replacing coal combustion with natural gas, however may be used effectively with oxy-fuel combustion of either coal or natural gas.

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