flue gas Articles

  • HClear™ Programs: A Solution-­Based Approach to HCl Abatement

    Fuel Tech recently developed HClear™, an HCl abatement program that relies on the injection of an aqueous solution into combustion gas stream to react with gaseous HCl. This technology involves an aqueous solution that is injected into the flue gas, downstream of the economizer outlet. Upon injection of the aqueous solution into the flue gas stream, a molecular precursor contained within ...


    By Fuel Tech, Inc.

  • NOx Control on a Budget

    National, regional and local regulations to reduce NOx emissions have prompted the development and implementation of a number of NOx control technologies – from selective catalytic reduction and low-NOx burners to overfire air and flue gas recirculation. Induced flue gas recirculation (IFGR), a design derivative of conventional forced flue gas recirculation, has demonstrated NOx reductions as ...

  • Case study - Jämtlands Värme, Strömsund

    The boiler for Jämtlands Värme in Stromsund was built in 1987.  The old flue gas condenser, from another supplier, began leaking and needed to be replaced. Boiler: 10 MW Fuel: Bio fuels Condensor effect: 2 MW The boiler in Strömsund was built in 1987 and in 1994 it was equipped with a flue gas ...


    By Envibat AB

  • Pollutant emissions from modern incinerators

    Emissions of dioxins are mainly from incinerators, domestic and industrial coal combustion, and traffic. However, the major public concern and research effort are associated with the emissions of organic micropollutants from waste incinerators. This paper gives a brief overview of the more recent research and development for the removal of dioxins and heavy metals from flue-gas streams. Special ...


    By Inderscience Publishers

  • Green Energy Applications Guide to Flow Measurement

    Provides technical discussion and illustrations for nine (9) different green energy and green-house gas flow measurement applications.  Includes landfill gas, biomass fermentation, wastewater digesters, on-farm biogas recovery, ethanol production/refining, coal mine and coal bed methane (CMM, CBM), biomass gasification, flare gas and flue gas.  Discussion includes overview of each ...

  • Case study - Ljusdal Energi, Sweden

    At Ljusdal Energy, a shell & tube-condenser is installed. The technique takes a bit more space and gives almost the same performance as a lamella type. However, the customer desired tube technology. The condenser will handle the flue gases of two boilers that can be in operation independently. Boiler: 2×10 MW Fuel: Biofuels ...


    By Envibat AB

  • Insitu analysis of ammonia slip and water vapor using a tunable diode laser for SCR/SNCR optimization and boiler tube surveillance in power plants

    ABSTRACT Environmental Regulations driven by the 1990 Clean Air Act require Power Plants to reduce NOx emissions. SCR's and SNCR's reduce NOx emission by injecting ammonia into the combustion flue gas. which ideally reacts with the NOx to form H?0 and Nj. The efficiency of the SCR SNCR is determined by monitoring the outlet for excess NH3. referred to as NH3 slip. The flue gas sample ...

  • Application of combustion analyzers in safety instrumented systems

    The combustion process has always been considered having the potential for a hazardous event which could lead to personnel injury or loss of production. To mitigate this risk, the process industry is now implementing Safety Instrumented Systems which can identify hazardous operating conditions and correctly respond in such a way to bring the combustion process back to a safe operating condition ...

  • A chemo-biological treatment of scrubbing water from power plants with recovery of value-added products

    A chemo-biological approach for treating sulphate-rich effluent generated during wet scrubbing of flue gas emissions from fossil fuel fired power plants has been discussed. Microbial sulphate reduction was carried out in an anaerobic up-flow packed bed bioreactor (R1) using ethanol as carbon source. More than 90% of Total Equivalent Sulphate (TES) present in the effluent was reduced to sulphide ...


    By Inderscience Publishers

  • A novel approach for modelling of NOx emission reduction in a tangentially fired coal boiler

    In this research paper, predictive modelling of NOx emission of a 210 MW capacity pulverised coal–fired boiler and combustion parameter optimisation to reduce NOx emission in flue gas is proposed. The effects of oxygen concentration in flue gas, coal properties, coal flow, boiler load, air distribution scheme, flue gas outlet temperature and nozzle tilt were studied. The data collected from ...


    By Inderscience Publishers

  • Practical Implementation of EN-14181in Particulate Monitoring - Case Study

    Introduction This case study summarises the results of implementing particulate monitoring according to EN-14181 in a municipal incinerator operated by SUA in Teesside, UK, with a ProScatter M type particulate instrument (Model PCME QAL 181). It also provides a comparison of results for monitoring the same stack with an ElectroDynamic particulate instrument (Model PCME QAL 991). This case ...

  • Ammonium, nitrate, and total nitrogen determination in fly ash

    Fly ash is a by-product of the combustion of pulverized coal and is composed of small particles. The composition of the fly ash may vary considerably, however, all fly ashes contain substantial amounts of silicon dioxide (SiO2), aluminum oxide (Al2O3) and calcium oxide (CaO). Nowadays, air pollution control standards require a separation of flue gas before being released to the atmosphere. Fly ...


    By BÜCHI Labortechnik AG

  • Computational modelling of NOx removal by selective non-catalytic reduction

    This paper presents the results of computational kinetic modelling of the removal of nitrogen oxides (NOx) from flue gases by selective non-catalytic reduction (SNCR) process using urea as a reducing agent. CHEMKIN and SENKIN computer codes were used with latest reaction mechanism parameters for simulated conditions in an isothermal plug flow reactor. Flue gas initial conditions were simulated as ...


    By Inderscience Publishers

  • Cold exergy recovery during LNG regasification through a closed Brayton cycle

    The liquified natural gas (LNG) regasification process is a source of cold exergy capable of being recovered for the exploitation of energy conversion. This paper presents a novel power plant structure that makes use of the LNG regasification process to increase the energy and exergy efficiency. The power plant consists of a closed Brayton cycle (CBC) fuelled by the flue gas released by the ...


    By Inderscience Publishers

  • The Right Mix for Clean Air

    Reducing air pollution is an increasingly important topic all around the world. Many governments—also in developing countries—set new limits for emissions such as nitrogen oxides in flue gas. Sulzer offers advanced mixing technology for flue gas cleaning. The installation in a large power plant shows that these high-performance mixers can cope with the most difficult requirements. ...


    By Sulzer Management Ltd

  • The Other Side of Zirconium Oxide case study

    Regular Fuel Efficiency Applications Separate Oxygen and Combustibles Sensors In standard flue gas applications for Thermox analyzers, the user generally tries to extract the maximum energy from the fuel and transfers as much of that energy as possible to the process. These applications require the process to be operated as efficiently as possible by keeping both oxygen (excess air) and ...

  • Company Interview: Colin Ryan, Cansolv Technologies, Inc.

    This is a TWST Interview with Colin Ryan, CFO of Cansolv Technologies Inc. SECTOR – POLLUTION & TREATMENT CONTROLS(WAR614) TWST: Could you begin by giving us a brief overview of Cansolv Technologies? Mr. Ryan: Cansolv Technologies Inc. was founded in 1997 by a group of entrepreneurial technology developers from Union Carbide (now Dow Corporation). This team had worked together in the late ...

  • Precipitator Solves Dryer Problem

    Plum Creek Manufacturing, Columbia Falls, Montana, installed a PPC Industries electrostatic precipitator to solve a direct fired dryer dust plugging problem. The electrostatic precipitator was installed in a very congested area and the project had to be done so the dryer was off-line a minimal amount of time. Plum Creek personnel relocated existing equipment, poured concrete footings, ran all of ...

  • Low emissions from large plants too

    Type     HOFGAS®- LPM 3000 Performance     3’000 Nm³/h, 15’000 kW Location     Scotland (GB) SituationEvery year, 150’000 tonnes of waste from Edinburgh, Lothian and the Borders Region are brought to the Dunbar landfill site. The waste is transported by rail to the site. In 2002, the UK Environmental Agency ...


    By Hofstetter BV

  • Science in Aid of Cleaner Air

    Some 60 million tons per year of nitric oxides are released worldwide to the environment as the consequence of human energy consumption. Efficient technologies have been developed to treat flue gas, and Sulzer with some 50 plants is the technology leader. A recent example is AES Cayuga, a coal-fired power plant in Lansing, NY (USA). The combustion of fossil fuels is often conducted at highest ...


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