The newly developed Simetal Merim process from Siemens boasts an energy recovery level 20-30 percent higher than that achieved by conventional dedusting plants.
A Simetal Merim dedusting plant is now being installed for use with a new blast furnace at a facility operated by Turkish steel producer Kardemir. The Merim (Maximized Emission Reduction and energy recovery in IronMaking) process does not require water or sludge processing facilities, which frees up space and lowers the required investment. The new dedusting plant in Turkey is scheduled to go into operation in the second half of 2013.
The blast furnace process for manufacturing crude steel creates a very dusty exhaust gas (blast furnace gas), which can be used for energy recovery by having it drive a turbine. All dust must be removed from the gas beforehand, however; otherwise the turbine blades will be damaged. Furnace dust consists mainly of fine and coarse ore particles that can be recycled after being separated.
Wet-type dedusting techniques that produce wastewater and sludge as byproducts have commonly been used up until now. Another possibility is to employ dry-type dedusting units. Their dust filters are very temperature-sensitive, however, which is why the technique is not utilized very extensively.
The newly developed Merim dry-type dedusting method enables optimal purification of the exhaust gas prior to the energy recovery process, as well as efficient separation of the dust into useful and non-useful components. With the help of a two-stage dry-type dedusting process that includes an innovative centrifugal separator and fabric filters, the Merim system improves the energy recovery performance of furnace gas turbines by 20-30 percent.
Siemens' patented Advanced Temperature Control System solves the problem of fabric filter temperature sensitivity by continually maintaining a furnace gas temperature of between 80 and 250 degrees Celsius. This ensures the fabric filters are not damaged by excessively high temperatures, and that no deposits can build up through condensation at low temperatures. To this end, the blast furnace gas is either cooled by injecting water or heated using a burner.
Merim lowers the dust content in blast furnace gas to less than three milligrams per standard cubic meter and achieves a useful dust component separation efficiency of up to 90 percent. The plant in Kardemir is designed to be able to clean a maximum of 400,000 standard cubic meters of blast furnace gas per hour.
Dr. Norbert Aschenbrenner | Siemens InnovationNews
Improved stability of plastic light-emitting diodes
19.04.2018 | Max-Planck-Institut für Polymerforschung
Intelligent components for the power grid of the future
18.04.2018 | Christian-Albrechts-Universität zu Kiel
Study published in the journal ACS Applied Materials & Interfaces is the outcome of an international effort that included teams from Dresden and Berlin in Germany, and the US.
Scientists at the Helmholtz-Zentrum Dresden-Rossendorf (HZDR) together with colleagues from the Helmholtz-Zentrum Berlin (HZB) and the University of Virginia...
Novel highly efficient and brilliant gamma-ray source: Based on model calculations, physicists of the Max PIanck Institute for Nuclear Physics in Heidelberg propose a novel method for an efficient high-brilliance gamma-ray source. A giant collimated gamma-ray pulse is generated from the interaction of a dense ultra-relativistic electron beam with a thin solid conductor. Energetic gamma-rays are copiously produced as the electron beam splits into filaments while propagating across the conductor. The resulting gamma-ray energy and flux enable novel experiments in nuclear and fundamental physics.
The typical wavelength of light interacting with an object of the microcosm scales with the size of this object. For atoms, this ranges from visible light to...
Stable joint cartilage can be produced from adult stem cells originating from bone marrow. This is made possible by inducing specific molecular processes occurring during embryonic cartilage formation, as researchers from the University and University Hospital of Basel report in the scientific journal PNAS.
Certain mesenchymal stem/stromal cells from the bone marrow of adults are considered extremely promising for skeletal tissue regeneration. These adult stem...
In the fight against cancer, scientists are developing new drugs to hit tumor cells at so far unused weak points. Such a “sore spot” is the protein complex...
In an article that appears in the journal “Review of Modern Physics”, researchers at the Laboratory for Attosecond Physics (LAP) assess the current state of the field of ultrafast physics and consider its implications for future technologies.
Physicists can now control light in both time and space with hitherto unimagined precision. This is particularly true for the ability to generate ultrashort...
13.04.2018 | Event News
12.04.2018 | Event News
09.04.2018 | Event News
19.04.2018 | Materials Sciences
19.04.2018 | Physics and Astronomy
19.04.2018 | Physics and Astronomy