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Mercury removal from flue gas streams using treated sorbents

An adsorbent and logistics technology, applied in the field of mercury removal, can solve problems such as harming the integrity of concrete, and achieve the effect of easy procurement

Inactive Publication Date: 2015-09-30
CABOT CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Certain activated carbons remain highly reactive and some are known to compromise the integrity of concrete

Method used

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  • Mercury removal from flue gas streams using treated sorbents
  • Mercury removal from flue gas streams using treated sorbents
  • Mercury removal from flue gas streams using treated sorbents

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Embodiment Construction

[0046] by referring to the attached Figure 1-5 , to better understand embodiments of the present disclosure and its advantages.

[0047] Utility plants often treat flue gases to reduce or remove various pollutants (pollutants), such as sulfur oxides (SO x ), particulate matter (PM), and heavy metals in order to comply with environmental and health-related regulations. The introduction of sorbents into the flue gas stream allows for the reduction or removal of mercury, heavy metals, through various chemisorption and physisorption phenomena. These sorbents are often captured in particle collection devices used by utility plants to capture PM, which is often in the form of fly ash. Because of the pozzolanic and cementitious properties of fly ash, for example, the ability of fly ash to exhibit binding characteristics in the presence of water and various hydraulic cements, utilities may consider collecting Fly ash recycling. See Dwight K. Smith, Cementing 7-17, 38-40 (5th prtg...

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Abstract

A method for modifying the properties of a sorbent comprising washing a sorbent with a washing solution so as to achieve an exchange of ions between the sorbent and the washing solution, and applying a halogen compound to the sorbent that has been washed with the washing solution to achieve a predetermined concentration of the halogen on the sorbent.

Description

[0001] priority claim [0002] This application claims priority to US Provisional Application 61 / 757,555, filed January 28, 2013, which is incorporated herein by reference in its entirety. technical field [0003] The present disclosure relates to mercury removal and more particularly to mercury removal from flue gas streams using treated sorbents. Background technique [0004] Utility plants often seek to remove mercury from waste gas streams to comply with environmental regulations. The introduction of activated carbon into exhaust gas streams is a common method for mercury removal. Once the activated carbon has removed the mercury, it is captured by the plant, often in the same device that captures particulate matter or fly ash. [0005] For various cost reasons, utility plants may seek to recycle collected fly ash as an additive or component in various construction materials. For example, fly ash can be used as a concrete additive. Frequently, the fly ash that utilit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/32B01J20/18B01J20/02B01J20/04B01D53/64B01J20/30
CPCB01J20/0288B01J20/046B01D2253/108B01J20/18B01J20/027B01J20/3234B01D53/64B01D2258/0283B01J20/3204B01D2251/108B01J20/3021B01D2251/304B01J20/3236B01D2257/602B01J2220/42B01D2253/25B01J20/3078B01D2251/60B01J20/186
Inventor P.M.亚当斯D.O.雷斯特M.威廉斯
Owner CABOT CORP