scholarly journals A novel multi-jet burner for hot flue gases of wide range of temperatures and compositions for optical diagnostics of solid fuels gasification/combustion

2017 ◽  
Vol 88 (4) ◽  
pp. 045104 ◽  
Author(s):  
Wubin Weng ◽  
Jesper Borggren ◽  
Bo Li ◽  
Marcus Aldén ◽  
Zhongshan Li
Keyword(s):  
Optical Diagnostics ◽  
Flue Gases ◽  
Solid Fuels ◽  
Wide Range

scholarly journals Lab-scale evaluation of possible mercury speciation in flue gas and mercury emission from combustion of pulverised solid fuels

2019 ◽  
Vol 201 ◽  
pp. 06001
Author(s):  
Maciej Cholewiński ◽  
Wiesław Rybak
Keyword(s):  
Flue Gas ◽  
Combustion Process ◽  
Flue Gases ◽  
Solid Fuels ◽  
Hard Coal ◽  
Scale Evaluation ◽  
Gaseous Products ◽  
Scale Method ◽  
Early Validation ◽  
Solid Biomass

In this work a new lab-scale method dedicated to the evaluation of both concentration and oxidation level of mercury in flue gases from pulverised fuel fired boiler was proposed. To detect the abovementioned parameters, 2 main steps need to be evaluated. Firstly, a calorimeter bomb is utilised - by a proper implementation of mass balance of mercury within substrates and products, the quantity of oxidised mercury in gaseous products can be evaluated. Then, to simulate solid fuel fired power unit and to calculate mercury concentrations in flue gases, one of the stoichiometric mathematical models of combustion process must be applied. Early validation of the method showed considerable differences between solid fuels in mercury oxidation efficiencies and concentrations in flue gasses. Four examined fuels (lignite, hard coal and 2 types of solid biomass) was investigated. Calculated mercury concentrations in raw flue gas (>700°C) varied between 4 and 75 µg/m3ref. The lowest quantity of oxidised forms ofHg in flue gases were identified in the case of investigated lignite (27% of total Hg), while significantly higher – for selected hard coal (72%) and one type of biomass (with high chlorine concentration; up to 98%).

scholarly journals Remote Optical Diagnostics of Nonstationary Aerosol Media in a Wide Range of Particle Sizes

10.5772/35215 ◽  
2012 ◽  
Author(s):  
Olga Kudryashova ◽  
Anatoly Pavlenko ◽  
Boris Vorozhtsov ◽  
Sergey Titov ◽  
Vladimir Arkhipov ◽  
...  
Keyword(s):  
Optical Diagnostics ◽  
Particle Sizes ◽  
Wide Range

scholarly journals Universal Installation for the integrated utilization of flue gases and wastewater from thermal power plants

2020 ◽  
Vol 178 ◽  
pp. 01062
Author(s):  
Sergey A. Glazyrin ◽  
Mikhail G. Zhumagulov ◽  
Zhanar A. Aydimbaeva ◽  
Abay M. Dostiyarov
Keyword(s):  
Carbon Dioxide ◽  
Power Plants ◽  
Thermal Power ◽  
Flue Gases ◽  
Solid Fuels ◽  
Sulfur Oxides ◽  
Thermal Power Plants ◽  
Cation Exchangers ◽  
Industrial Boilers ◽  
Integrated Utilization

For 30 years research has been carried out on the use of wastewater from thermal power plants and industrial boilers, as well as on the use and extraction of various components from flue gases such as carbon dioxide, sulfur and nitrogen. Technological solutions were developed and implemented in various productions at various times: use of acid-forming components of flue gases for the regeneration of cation exchangers; carbon dioxide from flue gases of 99.9% purity with “food” quality; technical nitrogen of 95-99 purity from flue gases; wastewater usage to increase the degree of sulfur oxides from flue gases. The article presents a technological solution for the integrated utilization of flue gases and wastewater from a thermal power plant with high-pressure boilers burning solid fuels.

scholarly journals Efficiency and Losses Analysis of Steam Air Heater from Marine Steam Propulsion Plant

Energies ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 3019 ◽  
Author(s):  
Josip Orović ◽  
Vedran Mrzljak ◽  
Igor Poljak
Keyword(s):  
Ambient Temperature ◽  
Power Plants ◽  
High Energy ◽  
Exergy Efficiency ◽  
Flue Gases ◽  
Exergy Destruction ◽  
Air Heater ◽  
Air Heating ◽  
Wide Range ◽  
Steam System

Air heaters are commonly used devices in steam power plants. In base-loaded conventional power plants, air heaters usually use flue gases for air heating. In this paper, the air heater from a marine steam propulsion plant is analyzed, using superheated steam as a heating medium. In a marine propulsion plant, flue gases from steam generator are not hot enough for the air heating process. In a wide range of steam system loads, the analyzed steam air heater has low energy power losses and high energy efficiencies, ranging from 98.41% to 99.90%. Exergy analysis of the steam air heater showed that exergy destruction is quite high, whereas exergy efficiency ranged between 46.34% and 67.14%. Air heater exergy destruction was the highest, whereas exergy efficiency was the lowest at the highest steam system loads, which was an unexpected occurrence because the highest loads can be expected in the majority of marine steam plant operations. The change in the ambient temperature significantly influences steam air heater exergy efficiency. An increase in the ambient temperature of 10 °C reduces analyzed air heater exergy efficiency by 4.5%, or more, on average.

Postcombustion Measures for Cleaner Solid Fuels Combustion:  Activated Carbons for Toxic Pollutants Removal from Flue Gases

2005 ◽  
Vol 19 (6) ◽  
pp. 2317-2327 ◽  
Author(s):  
G. Skodras ◽  
Ir. Diamantopoulou ◽  
P. Natas ◽  
A. Palladas ◽  
G. P. Sakellaropoulos
Keyword(s):  
Activated Carbons ◽  
Flue Gases ◽  
Solid Fuels ◽  
Toxic Pollutants ◽  
Pollutants Removal

scholarly journals DEVELOPMENT OF CONCEPTUAL TECHNICAL SOLUTIONS AND METHODS OF THEIR IMPLEMENTATION DURING THE DESIGN OF A DUST COAL STEAM GENERATOR OF SUPER-SUPER CRITICAL PARAMETERS OF STEAM 28 MPA / 600 °C/600 °C FOR 300 MW ENERGY UNIT. PART 3.

2021 ◽  
pp. 4-22
Author(s):  
B.B. Rokhman ◽  
N.I. Dunayevska ◽  
V.G. Vifatnyuk
Keyword(s):  
Steam Generator ◽  
Flue Gases ◽  
Austenitic Steels ◽  
Critical Parameters ◽  
Steam Temperature ◽  
Energy Unit ◽  
Wide Range ◽  
Thermal Calculations ◽  
The Cost ◽  
Technical Solutions

In the third part of this article, an attempt is made to expand the range of regulation of the steam generator load from 40% to 100% by injecting recirculating flue gases taken after the water economizer into the middle radiation part of the furnace. For this, verification thermal calculations of the boiler were carried out when burning ДГ-100 coal in a wide range of variation of the recirculation coefficient Krec = 10−20% at loads of 40% and 50% of the nominal. It is shown that: a) at a load of 50%, recirculation of flue gases Krec = 13 % leads to a drop in the steam temperature along the primary path, due to which the maximum wall temperatures of all-welded screens decrease, which makes it possible to reduce the cost of boiler manufacture by reducing the use of expensive austenitic steels by 116.3 t; b) to ensure a live steam temperature of 600 °С at a load of 40%, it is necessary that Krec = 12%. This leads to a rise in the cost of the boiler in comparison with the load of 50% due to the use of steel grade 10X16N16V2MBR in the manufacture of ceiling screens. Bibl. 3, Fig. 17, Tab. 4.

Simulation of a Small Scale Pellet Boiler

2009 ◽  
Author(s):  
J. C. F. Teixeira ◽  
B. N. Vasconcelos ◽  
M. E. C. Ferreira
Keyword(s):  
Combustion Chamber ◽  
Flue Gases ◽  
Fine Tuning ◽  
Small Scale ◽  
Dynamics Model ◽  
No Formation ◽  
Air Supply ◽  
Wide Range ◽  
Secondary Air ◽  
Solid Biomass

A Computational Fluid Dynamics model, implemented in the FLUENT code, has been used to describe with detail the combustion inside the furnace of a 15 kW pellet boiler. The solid biomass is modeled by the reaction of the volatile mater. The air supply is split into two regions with varying AF ratios. It was also observed that the NO formation in the combustion chamber is essentially due to the fuel-NO path and therefore the variations of excess air did not affect the concentration levels of NO at the exit of the combustion chamber. However by increasing the air supply in the vicinity of the grate (by moving the secondary air supply closer to the primary air supply) the NO levels increased. The emissions of the flue gases were measured and compared with the computed results. The results enable the optimization of the combustion chamber design and the efficient fine tuning of a pellet boiler for a wide range of power levels.

Sign in / Sign up

Export Citation Format

Share Document