scholarly journals Behavior of Cd during Coal Combustion: An Overview

Processes ◽  
2020 ◽  
Vol 8 (10) ◽  
pp. 1237
Author(s):  
Lucie Bartoňová ◽  
Helena Raclavská ◽  
Bohumír Čech ◽  
Marek Kucbel
Keyword(s):  
Flue Gas ◽  
Coal Combustion ◽  
Air Pollutants ◽  
Review Paper ◽  
Bottom Ash ◽  
Gas Composition ◽  
Hazardous Air Pollutants ◽  
High Volatility ◽  
Control Devices ◽  
Particulate Control

Due to the unfavorable combination of its toxicity and high volatility, Cd is contained in most lists of potentially hazardous air pollutants with the greatest environmental and human-health concerns. The review paper evaluates the behavior of Cd during combustion (incineration) processes and its redistribution among condensed fractions (bottom ash/slag, fly ash) and volatilized fractions (that passes through most particulate control devices). The paper addresses all important effects of Cd interactions, such as presence of organic or inorganic chlorides, moisture levels, S, P and Na concentrations, flue gas composition etc. Possibilities of using various adsorbents (either within in-furnace regime or applied in post-combustion zone) are evaluated as well. Special attention is paid to mitigating its emissions factors; decreasing Cd volatility and facilitating Cd retention are discussed with the view of various combustion (incineration) conditions and the feed fuel composition.

SYNCOM-Plus: An Optimized Residue Treatment Process

2009 ◽  
Author(s):  
Ralf Koralewska
Keyword(s):  
Flue Gas ◽  
Large Scale ◽  
Treatment Process ◽  
Bottom Ash ◽  
Fine Fraction ◽  
Continuous Operation ◽  
Wash Water ◽  
Waste To Energy ◽  
Gas Composition ◽  
Energy Plant

In a large-scale pilot plant, studies on wet-mechanical treatment of bottom ash using the SYNCOM-Plus process were carried out by MARTIN GmbH in the SYNCOM waste-to-energy plant in Arnoldstein, Austria (approx. 11000 kg/h waste throughput). Granulate of > 2 mm and fine fraction of < 5 mm were produced by dry screening, washing and wet screening. Additionally, sludge was separated from the wash water. The fine fraction and sludge as well as the boiler ash were recirculated into the furnace. In conclusion, the SYNCOM-Plus process meets all requirements which need to be complied with in an optimized and effluent-free commercial residue treatment process for the recovery of industrial products. This paper documents successful continuous operation of the SYNCOM-Plus process in direct connection with bottom ash discharge as well as the effects on combustion, flue gas composition and residue qualities.

Effect of CaO and Fe2O3 on Partitioning of As and S within Ash Fractions from Fluidised-Bed Co-Combustion of Coal and Wastes

2018 ◽  
Vol 11 (1) ◽  
pp. 81-90
Author(s):  
Lucie Bartoňová
Keyword(s):  
Fly Ash ◽  
Flue Gas ◽  
Coal Combustion ◽  
Bottom Ash ◽  
Correlation Coefficients ◽  
Fluidised Bed ◽  
Solid Product ◽  
Gas Cleaning

Possible interaction of volatilized As and S with CaO and Fe2O3 (creating solid product) could efficiently improve coal combustion flue gas cleaning. For this reason, S-CaO, As-CaO, S- Fe2O3 and As- Fe2O3 relationships were evaluated in bottom ash and fly ash fractions from fluidised-bed co-combustion of coal and wastes (and limestone as desulphurization additive) through calculation of correlation coefficients and composition of magnetic concentrates. It was concluded that S exhibited a dominant association with CaO while As exhibited affinity to both CaO and Fe2O3 - the significance differed a little in bottom ash and fly ash. In the bottom ash, the affinity of As to CaO was more significant, while in the fly ash the association to Fe2O3 slightly prevailed.

scholarly journals Desulfurisasi dan Penyerapan Merkuri secara Simultan dari Batubara Peringkat Rendah (Aceh Barat) untuk Aplikasi Power Plant dengan Adsorben Zeolit

2019 ◽  
Vol 7 (1) ◽  
pp. 73
Author(s):  
Yuanda Wattimena ◽  
Asri Gani ◽  
Medyan Riza
Keyword(s):  
Stainless Steel ◽  
Fly Ash ◽  
Power Plant ◽  
Fluidized Bed ◽  
Flue Gas ◽  
Coal Combustion ◽  
Bottom Ash ◽  
Tube Furnace ◽  
Fluidized Bed Combustion ◽  
Gas Combustion

Adsorpsi emisi pembakaran batubara dengan menggunakan adsorben zeolit pada jenis briket dan pulverized telah dilakukan. Penelitian ini bertujuan untuk mengurangi emisi gas SO2 dan logam Hg yang berbahaya apabila rilis di udara bebas dengan cara menggunakan adsorben zeolit untuk kecendrungan emisi menjadi bottom ash yang lebih terkendali. Pengujian ini fokus mengevaluasi rasio optimal rasio adsorben terhadap jumlah batubara terhadap performa penyerapan, sehingga penggunaannya tidak mengurangi nilai bakar batubara. Prosedur pembakaran ekspremintal awal dimulai dari pencampuran batubara dan zeolit dengan rasio 4%, 6%, 8%, 10%  dan 12%  yang dibagi dalam bentuk briket dan pulverized. Kedua jenis sampel dibakar secara berurutan pada electrical stainless steel reaction tube furnace pada kondisi temperatur pembakaran Fludized Bed Coal Combustion yaitu 600oC, 700oC, dan 800oC dengan laju alir udara disesuaikan. Flue gas hasil pembakaran yang keluar dari outlet dianalisa menggunakan Gas Combustion and Emission Analyzer (E4400, E-Instrument). Logam Hg yang yang diserap oleh zeolit pada Bottom Ash dianalisa menggunakan NIC Mercury SP Anlayzer. Hasil pengujian menunjukan kinerja zeolit terhadap kapasitas penyerapan logam Hg untuk pembakaran batubara pulverized pada temperatur pembakaran  600oC, 700oC dan 800oC masing-masing didapat pada angka 33,6, 19,25 dan 9,97 ppb/gr serta pada pembakaran briket batubara  masing-masing didapat sebesar 59,83, 37,8 dan 24,22 ppb/gr. Secara simultan untuk mengurangi emisi SO2 dan logam berat Hg pada fly ash untuk temperatur pembakaran Fludized Bed Coal Combustion rasio optimum berkisar antara 6%-8% adsoben zeolit dari jumlah massa batubara Kaway XVI Kabupaten Aceh Barat. Kata kunci:adsorpsi,  fluidized bed combustion, zeolit, briket, pulverized

Emissions of organic hazardous air pollutants during Chinese coal combustion

Energy ◽  
2002 ◽  
Vol 27 (5) ◽  
pp. 485-503 ◽  
Author(s):  
Rong Yan ◽  
Haijing Zhu ◽  
Chuguang Zheng ◽  
Minghou Xu
Keyword(s):  
Coal Combustion ◽  
Air Pollutants ◽  
Hazardous Air Pollutants ◽  
Chinese Coal

scholarly journals Modeling the desulphurization process while coal combustion in fluid boilers

Paliva ◽  
2020 ◽  
pp. 18-25
Author(s):  
Petr Buryan
Keyword(s):  
Fluidized Bed ◽  
Flue Gas ◽  
Coal Combustion ◽  
Gas Composition ◽  
Characteristic Parameters ◽  
Kinetics And Thermodynamics ◽  
Empirical Relations ◽  
Effects Of Temperature ◽  
Fluidized Bed Boilers ◽  
By Products

In the article are discussed the basic problems affecting flue gas desulphurisation produced in the fluidized bed boilers burning brown coal. There are compared the effects of temperature, residence time and flue gas composition in the fireplace, characteristic parameters and properties of limestone and dolomites, ratios of limestone and coal and cocombusted biomass and recirculation of by-products. The kinetics and thermodynamics of many reactions are represented here by mathematical and empirical relations.

Emissions of air pollutants from sintering flue gas in the Beijing-Tianjin-Hebei area and proposed reduction measures

2021 ◽  
Vol 304 ◽  
pp. 126958
Author(s):  
Honghong Yi ◽  
Tingting Zhong ◽  
Jun Liu ◽  
Qingjun Yu ◽  
Shunzheng Zhao ◽  
...  
Keyword(s):  
Flue Gas ◽  
Air Pollutants
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