Installation of a Brown Field Slag Reduction Furnace: State of the Art Off-Gas Treatment with Dry Gas Cleaning for SO2 Capture

2020 ◽  
pp. 187-199
Author(s):  
Peter Weber ◽  
Dirk Behrmann ◽  
Thomas Breuer ◽  
Rüdiger Margraf
Keyword(s):  
State Of The Art ◽  
Gas Treatment ◽  
Gas Cleaning ◽  
So2 Capture ◽  
Reduction Furnace ◽  
Slag Reduction

scholarly journals Improving the reliability, as well as energy and environmental efficiency of gas cleaning systems at TPP

2019 ◽  
Vol 11 (4) ◽  
pp. 288-293 ◽  
Author(s):  
A. T. Zamalieva ◽  
M. G. Ziganshin
Keyword(s):  
Power Plants ◽  
Stokes Equations ◽  
Coal Dust ◽  
Thermal Power ◽  
Primary Energy ◽  
Navier Stokes ◽  
Thermal Power Plants ◽  
Industrial Emissions ◽  
Gas Treatment ◽  
Gas Cleaning

Energy is the basic sector of the economy and the largest consumer of primary energy resources of any country, which is why the development of world energy is accompanied by global pressure on the environment. The issues are considered of reducing the atmospheric impact of emissions of thermal power plants, improving the reliability and working life of their units, systems, and plants as a whole. The principles are presented of development and improvement of technologies for processing industrial emissions of thermal power plants, the neutralization of which is currently relevant on a regional and global scale. Analysis is carried out of existing methods of cyclone and filtration treatment. An improved design of a cyclone filter is proposed, which allows to increase the reliability of gas turbine and steam-gas units of TPP, while ensuring the efficiency of separation of the suspended part of the flow at the gas treatment point (GTP) of TPP. Similar devices can also be used to increase the degree of cleaning atmospheric emissions released by the TPP coal dust preparation and flue gas systems at coal generation from fi ne particles of PM10 and PM2,5 classes (coal dust and ash), owing to reduction of the size of caught particles from average values for cyclones and wet scrubbers of the order of 5–10 μm to 0.5 μm. The design of the cyclone filter is improved as a result of research of cyclone filtration by methods of Computational Fluid Dynamics (CFD). A system of Reynolds-averaged equations of a single-phase Navier-Stokes flow is used for mathematical modeling of motion in the cyclone filter. To determine the efficiency of separation of the suspended part of the flow in the cyclone filter, the Rercomplex is used obtained by reducing a set comprising the Navier-Stokes equations and the equation of particle motion based on Newton's law to a dimensionless form. Numerical characteristics of the suspension sedimentation from a multiphase flow in a cyclone separator of specified dimensions are found by means of the Rercomplex. The results of bench tests of the proposed design of the cyclone filter are given. 

scholarly journals Experience of graphite-containing dust of metallurgical plants processing

2019 ◽  
Vol 75 (5) ◽  
pp. 632-639
Author(s):  
N. V. Fadeeva ◽  
N. N. Orekhova ◽  
O. E. Gorlova
Keyword(s):  
Carbon Materials ◽  
State Of The Art ◽  
Foam Formation ◽  
Ecological Significance ◽  
State Technical ◽  
Extensive Experience ◽  
Gas Cleaning ◽  
Russian Industry ◽  
Reagent Mode ◽  
Constant Practice

Graphite is a component of graphite-containing dust – one of wastes, formed at metallurgical plants. From the other side, it is a scare resource for the Russian industry. Involvement of graphite-containing wastes into processing can contribute to solving actual problems of resource, economic and ecological significance. Study of the graphite wastes utilization possibility showed an absence of constant practice of their processing at domestic metallurgical plants. The work of graphite department of Magnitogorsk steel-works (MMK) can be one of not numerous examples of the graphite dust processing at the same plant. At the department the processing of graphite-containing dust of accomplished, the dust being collected from 90 kg/h productivity gas cleaning systems of BOF shop. As a result of processing graphite concentrate obtained after flotation and iron powder – after magnetic separation. At the Department “Minerals enrichment” of the Magnitogorsk State Technical University after G.I. Nosov, the theory of graphite flotation is being elaborated under the direction of Professor V.B. Chizhevsky for many years. Besides study of graphite ores washability, which are difficult to be enriched is also carried out. Based on the gained extensive experience on perfection of reagent flotation modes for the graphite ores, it was recommended to use first VKP reagent at the MMK graphite department, and next – RAS foam formation agent, which is a refined sodium alkylartile-sulfonate. At the industrial tests, the RAS foam formation agent consumption was two times as lower comparing with industrial reagent mode, resulting in obtaining higher technological flotation indices. The experience of metallurgical plant graphite-containing dust processing can be used at both the MMK graphite department re-operation and at other plants of the industry for obtaining marketable products of high quality, that can meet requirements not only metallurgical plants, but also used for production of state-of-the-art carbon materials.

Treatment of Wastewater from Flue Gas Cleaning

1994 ◽  
Vol 29 (9) ◽  
pp. 307-312 ◽  
Author(s):  
Michael Vendrup ◽  
Christina Sund
Keyword(s):  
Heavy Metals ◽  
Flue Gas ◽  
Chemical Precipitation ◽  
Pilot Scale ◽  
Full Scale ◽  
Basic Operation ◽  
Gas Treatment ◽  
Gas Cleaning ◽  
Operation Rules ◽  
The Usa

Wet scrubber systems for flue gas treatment, giving rise to a production of wastewater contaminated with heavy metals, are used at many coal-fired power stations in Europe, the USA and Japan. In order to remove the heavy metals from the wastewater, chemical precipitation with hydroxide and sulphide is applied. Results from two full-scale plants are given. Due to strict regulations for landfilling of waste contaminated with heavy metals, the amount of sludge must be minimised. Different techniques to meet this requirement are described. Biological post-treatment to reduce the nitrogen content of the wastewater will apparently be a need in the future, and pilot-scale testing is presently being carried out to determine the basic operation rules for a full-scale plant.

State-of-the-art Exhaust Gas Treatment

MTZ worldwide ◽  
2019 ◽  
Vol 80 (6) ◽  
pp. 20-21 ◽  
Author(s):  
Marc Ziegler
Keyword(s):  
State Of The Art ◽  
Exhaust Gas ◽  
Gas Treatment

scholarly journals STATE OF THE ART GAS CLEANING AND UTILIZATION FOR BOF GASES: OPERATIONAL RESULTS AND BENEFITS

2014 ◽  
Author(s):  
Thomas Germershausen ◽  
Christian Fröhling ◽  
Matthias Meyn ◽  
Volker Trappmann ◽  
Jörg Thomasberger
Keyword(s):  
State Of The Art ◽  
Gas Cleaning

scholarly journals Determination of chromium (VI) in the dust of gas treatment plants in steelmaking plants.

2020 ◽  
pp. 42-44
Author(s):  
V. A. Makarov ◽  
T. K. Savosteenko
Keyword(s):  
Hexavalent Chromium ◽  
Raw Materials ◽  
Potassium Dichromate ◽  
Least Square Method ◽  
Photometric Determination ◽  
Least Square ◽  
Photometric Method ◽  
Gas Treatment ◽  
Gas Cleaning

The requirements for the content of hexavalent chromium in cements and raw materials for its manufacture are described. The problem with the utilization of dust from gas treatment plants of metallurgical plants at metallurgical enterprises is given. The influence of the chemical composition of the dust of gas cleaning plants of metallurgical plants on the determination of hexavalent chromium is established. A method for measuring the hexavalent chromium in the dust of gas cleaning plants of metallurgical plants by the photometric method is described. A method has been developed for extracting hexavalent chromium from dust at the cleaning units of metallurgical plants for subsequent photometric determination. An extraction method has been established to prevent underestimation of the hexavalent chromium content. The determination of hexavalent chromium was based on the formation of a blue-violet complex with diphenylcarbazide. Calibration was carried out on aque solutions with a known concentration of hexavalent chromium. For the preparation of calibration solutions, potassium dichromate of chemical purity was used. The concentration of hexavalent chromium in each calibration solution was carried out by a calculation method, overlapping the entire measurement range. The measurement of optical density was carried out on a photoelectric colorimeter type KFK-3, at a wavelength of 540 nm. Analysis of the obtained calibration dependence showed a good correlation. The calibration factor was calculated using the least square method. Extraction of hexavalent chromium from the sample to be analyzed was performed with water. The reducing effect of iron was eliminated with a solution of phosphoric acid. The developed technique is used when conducting certification control of dust from gas cleaning units of metallurgical plants, as well as during research.A validation procedure was carried out. Obtained acceptable limits of repeatability and reproducibility of the method.

Sign in / Sign up

Export Citation Format

Share Document