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
Did you know that infrared heat and UV light contribute to the success of your barbecue?
27.07.2017 | Heraeus Noblelight GmbH
Ultrathin device harvests electricity from human motion
24.07.2017 | Vanderbilt University
Physicists working with researcher Oriol Romero-Isart devised a new simple scheme to theoretically generate arbitrarily short and focused electromagnetic fields. This new tool could be used for precise sensing and in microscopy.
Microwaves, heat radiation, light and X-radiation are examples for electromagnetic waves. Many applications require to focus the electromagnetic fields to...
Strong light-matter coupling in these semiconducting tubes may hold the key to electrically pumped lasers
Light-matter quasi-particles can be generated electrically in semiconducting carbon nanotubes. Material scientists and physicists from Heidelberg University...
Fraunhofer IPA has developed a proximity sensor made from silicone and carbon nanotubes (CNT) which detects objects and determines their position. The materials and printing process used mean that the sensor is extremely flexible, economical and can be used for large surfaces. Industry and research partners can use and further develop this innovation straight away.
At first glance, the proximity sensor appears to be nothing special: a thin, elastic layer of silicone onto which black square surfaces are printed, but these...
3-D shape acquisition using water displacement as the shape sensor for the reconstruction of complex objects
A global team of computer scientists and engineers have developed an innovative technique that more completely reconstructs challenging 3D objects. An ancient...
Physicists have developed a new technique that uses electrical voltages to control the electron spin on a chip. The newly-developed method provides protection from spin decay, meaning that the contained information can be maintained and transmitted over comparatively large distances, as has been demonstrated by a team from the University of Basel’s Department of Physics and the Swiss Nanoscience Institute. The results have been published in Physical Review X.
For several years, researchers have been trying to use the spin of an electron to store and transmit information. The spin of each electron is always coupled...
26.07.2017 | Event News
21.07.2017 | Event News
19.07.2017 | Event News
27.07.2017 | Life Sciences
27.07.2017 | Life Sciences
27.07.2017 | Health and Medicine