PDF Publication Title:
Text from PDF Page: 024
particulates, which can be considered relatively clean, and are discharged into the atmosphere from stacks. There is no simple method of recovering heat from these gases. It is likely that the heat can be used for power generation using low-temperature power generation systems; however, at this stage the economics do not look favorable due to the long payback time. Clean boiler flue gases at low temperatures: These may be used for heating water in direct or indirect heat exchangers. Carbonic acid condensation could be a concern unless the water is used as “once-through water” or a slight increase in acidity does not affect the system. The economics of this may be marginal. Energy used in the incinerator is relatively low: It is possible to use a recuperator or regenerator for heat recovery; however, the payback time could be long. Rolling Mill and Finishing Area Rolling and finishing typically include reheat furnaces, annealing furnaces, and continuous annealing lines. The furnaces use natural gas, COG, and BFG as mixed fuel. The slabs’ drop-out temperature is 2,150°F (1,180°C), and the furnaces include a recuperator to preheat combustion air. For older installations (pre-1980s), air temperature can be very low (less than 700°F or 370°C), while the exhaust gas temperature varies from 1,000°–1,250°F (540°-680°C), with a large percentage of O2 (sometime higher than 8%). Areas of waste heat include the following: Exhaust gas from furnaces: The gases are relatively clean (free of particulates or condensable vapors); however, in some cases, they contain large amounts of excess air. Reducing O2 and recovering heat using better recuperators will be of great benefit. Radiation heat from furnace openings: Radiation heat usually comes from the charge and discharge end as well as from other areas, including the roof and parts of the furnace shell or walls. Heat from rolled steel shapes: The industry normally does not recover heat from rolled shapes, thus it may be beneficial to consider heat recovery. Steel – Mini Mill or EAF Mill The following are types of waste heat sources typically present at almost all EAF steel-making plants: Waste heat in clean exhaust gases from reheat furnaces, tundish heaters, and ladle heaters: These gases are in the range of 1,000°F (540°C) from the heat furnace respirators to 1,800°F (980°C) from ladle and tundish heaters. These gases contain combustion elements of natural gas and do not contain any major contaminants. They are prime candidates for additional heat recovery as they contain as much as 35% of the total heat input for the heating systems. o Possible options for heat recovery include higher efficiency heat recovery system charge or load preheating, either recuperator or regenerative; load or charge preheating; steam and power generation; and the use of low-temperature power generation cycles, such as an organic Rankine cycle based system. There is very little need for heat recovery for hot water, hot air, or cooling systems. Industrial Waste Heat Recovery Page 14PDF Image | Industrial Waste Heat Recovery: Potential
PDF Search Title:
Industrial Waste Heat Recovery: PotentialOriginal File Name Searched:
Pub52987.pdfDIY PDF Search: Google It | Yahoo | Bing
NFT (Non Fungible Token): Buy our tech, design, development or system NFT and become part of our tech NFT network... More Info
IT XR Project Redstone NFT Available for Sale: NFT for high tech turbine design with one part 3D printed counter-rotating energy turbine. Be part of the future with this NFT. Can be bought and sold but only one design NFT exists. Royalties go to the developer (Infinity) to keep enhancing design and applications... More Info
Infinity Turbine IT XR Project Redstone Design: NFT for sale... NFT for high tech turbine design with one part 3D printed counter-rotating energy turbine. Includes all rights to this turbine design, including license for Fluid Handling Block I and II for the turbine assembly and housing. The NFT includes the blueprints (cad/cam), revenue streams, and all future development of the IT XR Project Redstone... More Info
Infinity Turbine ROT Radial Outflow Turbine 24 Design and Worldwide Rights: NFT for sale... NFT for the ROT 24 energy turbine. Be part of the future with this NFT. This design can be bought and sold but only one design NFT exists. You may manufacture the unit, or get the revenues from its sale from Infinity Turbine. Royalties go to the developer (Infinity) to keep enhancing design and applications... More Info
Infinity Supercritical CO2 10 Liter Extractor Design and Worldwide Rights: The Infinity Supercritical 10L CO2 extractor is for botanical oil extraction, which is rich in terpenes and can produce shelf ready full spectrum oil. With over 5 years of development, this industry leader mature extractor machine has been sold since 2015 and is part of many profitable businesses. The process can also be used for electrowinning, e-waste recycling, and lithium battery recycling, gold mining electronic wastes, precious metals. CO2 can also be used in a reverse fuel cell with nafion to make a gas-to-liquids fuel, such as methanol, ethanol and butanol or ethylene. Supercritical CO2 has also been used for treating nafion to make it more effective catalyst. This NFT is for the purchase of worldwide rights which includes the design. More Info
NFT (Non Fungible Token): Buy our tech, design, development or system NFT and become part of our tech NFT network... More Info
Infinity Turbine Products: Special for this month, any plans are $10,000 for complete Cad/Cam blueprints. License is for one build. Try before you buy a production license. May pay by Bitcoin or other Crypto. Products Page... More Info
| CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com | RSS | AMP |