-
公开(公告)号：US11332388B2
公开(公告)日：2022-05-17
申请号：US16999687
申请日：2020-08-21
Applicant: FUEL TECH, INC.
Inventor： Mingming Fang , Heng Wang
IPC: C02F1/28 , B01J20/12 , C02F101/10
Abstract: The description relates to a composition and a method for reducing the concentration of selenium in water. Contaminated water is contacted with a kaolinite clay characterized by a removal efficiency for selenatearsenate of at least 40 wt % at ambient temperature. The adsorption process is fast. Following sufficient contact, the water is separated from the kaolinite clay. In a preferred form, the kaolinite clay has high surface acidity.
-
公开(公告)号：US20190040577A1
公开(公告)日：2019-02-07
申请号：US15665564
申请日：2017-08-01
Applicant: Fuel Tech, Inc.
Inventor： Chrstopher R. Smyrniotis , ian Saratovsky , Edward G. Schaub , Scott Bohlen
IPC: D21C11/00
Abstract: Disclosed is a process for reducing slag in a black liquor recovery boiler, the process comprising: injecting and burning black liquor in a boiler by contacting it with primary air and secondary air; introducing a slag-reducing chemical into the gases above the injection locations through interlaced, tangential or concentric secondary, tertiary, and/or quarternary air ports.
-
公开(公告)号：US10197272B2
公开(公告)日：2019-02-05
申请号：US15272479
申请日：2016-09-22
Applicant: Fuel Tech, Inc.
Inventor： Ian Saratovsky , Scott K. Bohlen , Chrisopher R. Smyrniotis , Kent W. Schulz , Emelito P. Rivera
Abstract: The description relates to a process for reducing acid plume from stacks from coal-fired combustors operating at varying loads, which have typically been treated by back-end calcium carbonate (limestone) which has not been able to effectively control visible acid plume as power is ramped up from low load. According to the process, as high sulfur and high iron coals are burned in a combustor, magnesium hydroxide slurry is introduced into hot combustion gases in or near the combustion zone. And, during ramp up to high load from a period of operation at low load, additional magnesium hydroxide is introduced into an intermediate-temperature zone.
-
4.发明授权公开(公告)号：US10124288B2
公开(公告)日：2018-11-13
申请号：US14516682
申请日：2014-10-17
Applicant: FUEL TECH, INC.
Inventor： William H. Sun , Fabian Johan Solberg , Gerry Carl Snow , Steven William Cottingham , Vasudeo Shashikant Gavaskar
Abstract: Disclosed is a process for controlling injection of magnesium oxide (or precursor) for reducing the concentration of sulfur trioxide in combustion gases from a combustor burning vanadium and sulfur-containing fuel while operating the boiler with enhanced efficiency. In-fuel introduction is combined with mid-temperature introduction, where both can be operated effectively, are found to be of primary importance. When in-fuel introduction will not be effective due to selectivity problems, feed can be shifted to a high-temperature zone. Where the high- or mid-temperature zone cannot be fully utilized due to obstructions for injection or insufficient soot blowers to address fouling of that zone or boiler operational changes to integrate the magnesium oxide injection is insufficient, an entire or a portion of feed can be shifted to the low-temperature zones.
-
公开(公告)号：US20180312773A1
公开(公告)日：2018-11-01
申请号：US15967652
申请日：2018-05-01
Applicant: Fuel Tech, Inc.
Inventor： Christopher R. Smyrniotis , Ian Saratovsky
Abstract: The description relates to controlling slagging and/or fouling in biomass burning furnaces. Combustion of such a biomass the fuel with air produces combustion gases containing sodium and/or potassium compositions, and the combustion gases are treated by contacting the combustion gases with kaolin and aluminum hydroxide. At least one of the kaolin and aluminum hydroxide can be introduced with the fuel, in a combustion chamber, with reburn fuel or with overfire air. For fuels also high in zinc and/or heavy metals, magnesium hydroxide is introduced into the combustion chamber or following heat exchangers.
-
Patent Agency Ranking
公开(公告)号：US20170089572A1
公开(公告)日：2017-03-30
申请号：US15272479
申请日：2016-09-22
Applicant: Fuel Tech, Inc.
Inventor： Ian Saratovsky , Scott K. Bohlen , Chrisopher R. Smyrniotis , Kent W. Schulz , Emelito P. Rivera
CPC classification number: F23J15/003 , B01D53/502 , B01D53/64 , B01D53/8609 , B01D53/8628 , B01D53/8631 , B01D2251/402 , B01D2255/2047 , B01D2257/302 , B01D2257/404 , B01D2257/602 , B01D2258/0283 , F23J7/00 , F23J15/04 , F23J2219/10 , F23J2219/50 , F23J2900/15004
Abstract: The description relates to a process for reducing acid plume from stacks from coal-fired combustors operating at varying loads, which have typically been treated by back-end calcium carbonate (limestone) which has not been able to effectively control visible acid plume as power is ramped up from low load. According to the process, as high sulfur and high iron coals are burned in a combustor, magnesium hydroxide slurry is introduced into hot combustion gases in or near the combustion zone. And, during ramp up to high load from a period of operation at low load, additional magnesium hydroxide is introduced into an intermediate-temperature zone.
-
公开(公告)号：US20150110698A1
公开(公告)日：2015-04-23
申请号：US14578828
申请日：2014-12-22
Applicant: Fuel Tech, Inc.
Inventor： Christopher R. Smyrniotis , Kent W. Schulz , Emelito P. Rivera , Ian Saratovsky , Vasudeo S. Gavaskar
CPC classification number: B01D53/68 , B01D53/502 , B01D53/508 , B01D53/64 , B01D53/685 , B01D53/80 , B01D2251/402 , B01D2251/404 , B01D2251/80 , B01D2253/112 , B01D2253/304 , B01D2257/2045 , B01D2257/302 , B01D2258/0283 , B01J20/0237 , B01J20/0274 , B01J20/0281 , B01J20/0296 , B01J20/041 , B01J20/28004 , B01J2220/42
Abstract: Dry processes, apparatus, compositions and systems are provided for reducing emissions of sulfur oxides, and sulfur dioxide in particular, and/or HCl and/or Hg in a process employing a combination of a lime-based sorbent, in particular hydrated lime and/or dolomitic hydrated lime, and a sorbent doping agent administered to achieve coverage of a three-dimensional cross section of a passage carrying SOx and/or HCl and/or Hg-containing gases with a short but effective residence time at a temperature effective to provide significant sulfur dioxide and/or HCl and/or Hg reductions with high rates of reaction and sorbent utilization. The once-through, dry process can advantageously introduce the sorbent and sorbent doping agent dry or preferably as a slurry to enable uniform treatment. Preferred sorbent doping agents include water-soluble or water-dispersible copper and/or iron compositions which can be heated to an active form in situ by the flue gases being treated.
Abstract translation: 提供了干法，装置，组合物和系统，用于在使用基于石灰的吸附剂，特别是熟石灰和/或硫酸的组合的方法中减少硫氧化物，特别是二氧化硫和/或HCl和/或Hg的排放， 或白云石熟石灰，以及施用吸附剂掺杂剂，以实现承载SOx和/或HCl和/或含Hg气体的通道的三维横截面的覆盖，所述通道在有效提供的温度下具有短但有效的停留时间 显着的二氧化硫和/或HCl和/或Hg减少，反应速率高和吸附剂利用率高。 一次性干燥方法可以有利地将吸附剂和吸附剂掺杂剂引入干燥或优选作为浆料以使得能够均匀地处理。 优选的吸附剂掺杂剂包括可被待处理的烟道气原位加热到活性形式的水溶性或水分散性铜和/或铁组合物。
-
公开(公告)号：US11944952B2
公开(公告)日：2024-04-02
申请号：US17709716
申请日：2022-03-31
Applicant: Fuel Tech, Inc.
Inventor： Mingming Fang , Heng Wang
CPC classification number: B01J20/20 , B01J20/08 , B01J20/103 , B01J20/12 , B01J20/14 , B01J20/28059 , C02F1/288 , B01J2220/42 , C02F1/281 , C02F2101/103 , C02F2101/106
Abstract: A composition and process for reducing contaminants from water which includes use of a water-insoluble adsorbent having a surface area of at least about 10 m2/g, where the adsorbent is coated with a water-soluble metal salt.
-
公开(公告)号：US20230256405A1
公开(公告)日：2023-08-17
申请号：US18105807
申请日：2023-02-04
Applicant: Fuel Tech, Inc.
Inventor： Ronald A. Lau , Karen Ringel
CPC classification number: B01F35/7182 , B33Y80/00 , B01F2101/305
Abstract: A channel manifold is presented, and which includes a dimensionally stable channel plate having top, bottom and side surfaces and a channel formed in a surface thereof, wherein the channel splits into a plurality of subsidiary channels along the surface of the channel plate and has an entrance port and a plurality of exit ports such that a fluid fed into the entrance port is expelled through the plurality of exit ports.
-
公开(公告)号：US09802154B2
公开(公告)日：2017-10-31
申请号：US14578828
申请日：2014-12-22
Applicant: Fuel Tech, Inc.
Inventor： Christopher R. Smyrniotis , Kent W. Schulz , Emelito P. Rivera , Ian Saratovsky , Vasudeo S. Gavaskar
CPC classification number: B01D53/68 , B01D53/502 , B01D53/508 , B01D53/64 , B01D53/685 , B01D53/80 , B01D2251/402 , B01D2251/404 , B01D2251/80 , B01D2253/112 , B01D2253/304 , B01D2257/2045 , B01D2257/302 , B01D2258/0283 , B01J20/0237 , B01J20/0274 , B01J20/0281 , B01J20/0296 , B01J20/041 , B01J20/28004 , B01J2220/42
Abstract: Dry processes, apparatus, compositions and systems are provided for reducing emissions of sulfur oxides, and sulfur dioxide in particular, and/or HCl and/or Hg in a process employing a combination of a lime-based sorbent, in particular hydrated lime and/or dolomitic hydrated lime, and a sorbent doping agent administered to achieve coverage of a three-dimensional cross section of a passage carrying SOx and/or HCl and/or Hg-containing gases with a short but effective residence time at a temperature effective to provide significant sulfur dioxide and/or HCl and/or Hg reductions with high rates of reaction and sorbent utilization. The once-through, dry process can advantageously introduce the sorbent and sorbent doping agent dry or preferably as a slurry to enable uniform treatment. Preferred sorbent doping agents include water-soluble or water-dispersible copper and/or iron compositions which can be heated to an active form in situ by the flue gases being treated.
-
-
-
-
-
-
-
-
-
Search Results
33
records
(took 0.017 seconds)
