Fabric Filter Abstracts

December 2007

FF 07 12 01 “Wet, Semi-wet or Dry Adiox Absorber Technology Targets” by Sven Andersson and Per Lindgren, Götaverken Miljö AB. Filtration+Separation, July/August 2006, 1 p.
The Swedish municipal power company Tekniska Verken Linköping AB has contracted Götaverken Miljö AB to outfit three of its municipal waste incinerators with a common dry Adiox absorber for dioxin removal. The maximum total flue gas flow is 186,000 Nm³/h. The Adiox technology is based on a special carbon doped plastic material, which can efficiently absorb large quantities of dioxins (PCDD/Fs). Wet scrubber interiors such as tower packings and droplet and separators are fabricated in Adiox material resulting in multifunctional scrubber systems where a dioxin absorption capability is added to the acids removal and heavy metal removal. Even more functions can be added to the scrubber by implementing MercOx technology for the removal of elemental mercury, as well as enhanced energy recovery by flue gas condensation. Adiox can be applied in scrubbers to minimize the so called memory effect, or to increase the overall dioxin removal, which results in the additional security of guaranteeing low emissions (in this respect, the memory effect is the well-known absorption/desorption of dioxin from traditional plastic materials, which may sometimes cause problems regarding the dioxin emission limits). The operational modes of Adiox include wet, semi-wet or dry mode.
IF 399 DRY SCRUBBER, IF 236 DIOXIN,
C GÖTAVERKEN, W 053 SWEDEN,
S 4953/01 INCINERATOR, MUNICIPAL

FF 07 12 02 “Basic Oxygen Furnaces are Works in Progress” by Editor. Metal Producing & Processing, September/October 2007, 1 p.
As the global industry develops new markets, modernization helps basic oxygen steelmaking retain its position as the core of steelmaking. The demand for high-volume operations is as strong as ever, as illustrated by Turkish steelmaker Isdemir’s recent contract with SMS Demag to expand its flat-products capabilities at the Iskenderun Works. Now, the producer has ordered three 200-mt BOFs to replace smaller vessels. SMS also will supply two ladle furnaces and BOF gas-recovery plant, modernize the dust-control and scrubber system, and supply two two-strand slab casters. All the new equipment is being installed with minimal interruption to the ongoing operations, and various efforts have been made to integrate the existing and new equipment. Primary cooling and cleaning systems are based on SMS’s Baumco technology, which is being retrofitted to the existing melt shop. The gas scrubber is being installed outside the BOF shop, using existing structures. A BOF gas-recovery plant is being built nearby.
S 3312/10 STEEL BOF, C SMS

FF 07 12 03 “Filter Media Ideal for Spanish Cement Market” by Editor. Processingtalk, September 24, 2007, 3 p.
By replacing electrostatic precipitators (ESP) with specially designed high temperature bag filters for the dedusting of cement kilns, cement efficiency and production is being improved in Spain. During the last year SATI has supplied local cement companies with over 10,000 filter bags made with Donaldson Membranes Tetratex 6255 Woven Glass fabric with the Ultra High Efficiency ePTFE membrane, a media designed specifically to provide optimum performance for the most demanding of applications while being suitable for continuous operation at temperatures of up to 260°C. Offering the benefit of a reduced bag cleaning regime, both in terms of compressed air pressure and frequency of clean, Tetratex 6255 can also provide near-zero particulate emissions, extended bag life, consistently lower filter pressure drop and reduced maintenance costs.
C DONALDSON, W 052 SPAIN,
S 3240/04 CEMENT KILNS, IF 364 PTFE,
IF 321 MEMBRANES

FF 07 12 04 “Frazier Bulk Helps Alpha Foundry Save Time, Labor, and Floor Space” by Editor. Foundry Management & Technology, June 2007, 1 p.
Once Alpha Foundry Co. in Wright City, MO, realized that demand for its aluminum and zinc castings was rising and its production was increasing, it recognized it had problem: as output increased Alpha’s operations required more and more foundry sand, which meant the facility needed a way to store sand in high volumes. They presented the problem to Frazier Bulk Inc. which designs and installs bulk material-handling systems, including several types of storage, conveying, weighing, dust-collection, and inventory-control systems. After a thorough evaluation of the operating requirements and facility layout, Frazier Bulk proposed a system involving two 30-ton silos and a 30-ton/hour bucket elevator to fill each silo. Equipment was delivered last summer and installed by Alpha Foundry’s workers. Frazier Bulk used standard product designs for the bucket elevators, but with simple sand-handling modifications. Use-specific features include high-wear buckets, commercial bearings, urethane-lined boot and head sections, a self-cleaning boot pulley, and abrasion-resistance rubber spouting. The system has opened up floor space inside the foundry, making more room available to produce castings, and besides the labor and space savings the foundry’s need for disposing of sand-storage bags has diminished.
C FRAZIER BULK, S 3361/00 ALUMINUM FOUNDRIES

FF 07 12 05 “NSP to give Trenton Power Plant $45m Refit” by Monica Graham. The Chronicle Herald, November 17, 2007, 2 p.
Nova Scotia Power has announced a $45-million investment at Trenton. The plan calls for a $15 million replacement for Trenton Five’s Generator, to be largely constructed elsewhere by Mitsubishi Canada and then brought to Trenton. The turbine is run by steam created by burning coal. But burning coal creates soot, and the remaining $30 million will go toward a pollution control system known as a baghouse that will filter ash particles from the plant’s emissions. The system will allow the use of low-sulphur coal to reduce emissions of sulphur dioxide and particulate. The baghouse, a series of filters through which emissions must pass before being released into the air, will trap more than 99.9 percent of particulate, compared to 99 percent filtered by the existing system. The baghouse will be built mostly on-site by Dustex of Atlanta, GA. Both projects will be completed by 2009 and will inject about $10 million worth of jobs into the Nova Scotia economy. When Trenton Five was built in 1969, its electrostatic precipitator was state-of-the-art pollution control technology, capturing soot particles as they left the generator.
W 010 CANADA, C NOVA SCOTIA POWER,
C DUSTEX, S 4911/23 UTILITY, COAL-FIRED

FF 07 12 06 “Oregon Demands Tougher Permit; Mayor Wants Original Limits on Coking Plant’s Emissions” by Tom Henry. Toledo Blade, July 2007, 2 p.
One week after Toledo Mayor Carty Finkbeiner demanded that the proposed $800 million FDS Coke Plant project be held to stringent pollution controls outlined in its original 2004 permit, Oregon Mayor Marge Brown echoed that sentiment and went one step further. In a letter released yesterday, she urged new Ohio Environmental Protection Agency Director Chris Korleski to veer from that permit only if he is incorporating something tougher. She said Oregon wants the state agency “to retain the strictest possible limits in place for all pollutants.” The 2004 permit, issued by former Ohio EPA Director Chris Jones, called for no uncontrolled venting of pollutants during maintenance activities. The modification allowed for up to 48 days. But the modification also gave the Michigan Department of Environmental Quality’s air division a tighter control it wanted by requiring a lime-coated baghouse and carbon injected system to capture mercury particles instead of a multiclone device. Multiclones are cheaper and less-efficient devices that trap pollutants by spinning like washing machines. Baghouses trap mercury dust and particles like vacuum cleaner bags, with the lime having a magnetic effect on drawing particles. The carbon device is highly effective at capturing mercury in its gaseous state. Ms. Brown said she wants the Ohio EPA to pick out the best available pollution-control technology from the 2004 permit and the 2005 modification.
W 124 MICHIGAN, W 137 OHIO, W 139 OREGON,
S 3312/03 COKE OVENS, C U.S. EPA

FF 07 12 07 “Recover Precious Metals from Spent Catalysts” by K. M. Beirne, Sabin Metal Corporation, East Hampton, NY. Hydrocarbon Processing, September 2007, 4 p.
Precious-metal-bearing catalysts, particularly those containing platinum group metals (PGMs) — such as platinum, palladium, rhodium and ruthenium — play a vital role in the hydrocarbon processing industry, both for facilitating or speeding chemical reactions and for end-of-pipe emission control. Regardless of how or in what form they are used, most catalysts deteriorate over time as a result of exposure to harsh processing conditions, and they must eventually be regenerated or replaced. Because the catalysts are very expensive, the valuable metals remaining at the end of the catalyst’s useful life are normally recovered. Ideally, a precious-metals recovery plant should employ state-of-the-art pollution-control systems, such as after burners, baghouses, scrubbers and process water evaporation. It should also not ship hazardous wastes offset for treatment and/or disposal. If it does send wastes elsewhere, the waste hauler and waste receiver must also meet all applicable environmental standards. This article offers guidelines for maximizing the reclamation of valuable byproducts to ensure the highest possible return on investment.
IF 405 PRODUCT RECOVERY BAGHOUSES,
S 1045/00 PLATINUM GROUP METALS

FF 07 12 08 “ThyssenKrupp Outlines $2.9-Billion Steel Mill Projects” by Editor. Metal Producing & Processing, March/April 2007, 2 p.
ThyssenKrupp Steel has outlined an ambitious plan to construct a new carbon and stainless steel complex in the Southeastern U.S., a project it estimates at $2.9 billion. Sites in Alabama and Louisiana are under consideration for the installation, which the group predicted will be “one of the largest private industrial development projects in the United States over the next decade.” Plans call for it to begin production in 2010. The complex’s target markets will be automotive, packaging, construction, electrical and utility, appliances, precision machinery, and engineered products. TK explained the installation will have a hot-strip mill to process carbon steel slabs supplied from a greenfield steel mill the group is building now in Brazil. Separately, the new complex will have a stainless steel melt shop — presumably, including an electric furnace, ladle metallurgy equipment, degassing vessels, and a slab caster — with a first-phase capacity of 1 million metric tons/year of stainless slab.
C THYSSENKRUPP, IF 110 MARKETS,
S 3312/00 STEEL MILLS