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Method to remove an agent using a magnetic carrier

A magnetic carrier and reagent technology, applied in the field of process systems, can solve problems such as no substantive results, achieve considerable economic advantages, improve functions, and reduce costs.

Inactive Publication Date: 2008-11-19
STEWARD ENVIRONMENTAL SOLUTIONS
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  • Abstract
  • Description
  • Claims
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  • Method to remove an agent using a magnetic carrier
  • Method to remove an agent using a magnetic carrier
  • Method to remove an agent using a magnetic carrier

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[0021] On a technical level, the present invention looks at the removal of mercury from effluents from fossil fuel power generation systems. In the prior art, mercury has been removed from sewage using adsorbents bound to a solid phase, such as activated carbon, plates or channels. These prior art methods are not entirely satisfactory in removing mercury because conventional sorbents such as activated carbon, sulfur and elemental gold have specific problems including cost, polluting fly ash, and performance issues High efficiency in removing mercury from gas streams. The main reason seems to be that a particular sorbent works or works best with mercury in its oxidized state and does not work well with mercury in its non-oxidized or elemental vapor state. This problem is solved by using magnetic carriers of sufficiently small size suspended in the exhaust gas. The magnetic carrier is functionalized to bind mercury. An advantage over the prior art is that it can be reused. I...

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Abstract

The subject of the invention is a process for removal or separation of agents from dynamic process systems, particularly when the agent may be hazardous. Its primary embodiment lies in the removal of mercury from the exhaust from fossil fired heating systems, however, it can be seen as also applicable to many other types of separation processes. The process uses a regenerable and recyclable magnetic substrate having a sorbent attached thereto. The combination of the magnetic substrate and sorbent is referred to as a magnetic carrier.

Description

technical field [0001] The field of the invention generally relates to the removal of reagents, such as mercury, from process systems, such as fossil fuel power generation systems. Background technique [0002] Mercury is an impurity present in low concentrations in the Earth's crust. Mercury exists in three basic forms: metal, Hg +1 or Hg +2 Valence forms of inorganic mercury (eg in the form of inorganic chlorides) and organic mercury bonded to phenyl, alkoxyalkyl or methyl groups. Methylmercury and elemental mercury are the most harmful forms. [0003] The source of most mercury pollution is the burning of coal. Coal is formed from the combination of prehistoric buried organic plant material undergoing long-term decay and pressurization under reducing conditions. Considering the natural process of coal formation and the high solubility of mercury in organic solvents, it is easy to see how mercury could get into coal. Mercury has a solubility of ~1-2.5 mg / L in benzene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/34B01D53/64
CPCB01D2259/814B03C1/015B01D53/64B01D2257/602
Inventor H·G·帕里斯董星
Owner STEWARD ENVIRONMENTAL SOLUTIONS
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