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Mercury removal apparatus, a flue gas treatment system, and a method of removing mercury

A flue gas and equipment technology, applied in the field of mercury removal equipment, can solve the problems of reduced ultraviolet transmission, low efficiency of ultraviolet lamps, low mercury concentration, etc.

Inactive Publication Date: 2017-01-25
KK TOSHIBA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] However, the method of oxidizing mercury by ultraviolet radiation requires a considerable amount of electricity due to the low mercury concentration of flue gas and the low efficiency of ultraviolet lamps
In addition, UV light transmission is reduced due to contamination of the surface of the UV lamp, which requires frequent cleaning of the UV lamp

Method used

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  • Mercury removal apparatus, a flue gas treatment system, and a method of removing mercury
  • Mercury removal apparatus, a flue gas treatment system, and a method of removing mercury
  • Mercury removal apparatus, a flue gas treatment system, and a method of removing mercury

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Embodiment Construction

[0021] Reference will now be made in detail to the present embodiments, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like elements.

[0022] figure 1 is a view about a flue gas treatment system according to an embodiment. Such as figure 1 As shown in , the flue gas treatment system 10 includes a selective catalytic reduction device (SCR) 11, a heat exchanger (heat recovery side) 12, a dust collector 13, a flue gas desulfurization device (FGD) 14, a mercury oxidation device 15, a scrubber 16 and heat exchanger (reheat side) 17.

[0023] The gas discharged from the boiler 26 is flue gas 25A, the gas discharged from the SCR 11 is flue gas 25B, the gas discharged from the FGD 14 is flue gas 25C, the gas discharged from the mercury oxidation device 15 is flue gas 25D, and from the scrubber The gas discharged from 16 is flue gas 25E.

[0024] The SCR 11 ...

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Abstract

A mercury removal apparatus for removing the metal mercury in an flue gas containing the metal mercury and halogen, including an electro discharging device including a first electrode and a second electrode facing the first electrode, and activating the mercury by generating a streamer discharge, an oxidizing catalyst device provided at an output of the electro discharging device, to oxidize the mercury by reacting with halogen in the flue gas.

Description

technical field [0001] The invention relates to a mercury removal device for removing mercury in flue gas containing metallic mercury (HgO). Background technique [0002] Flue gases from coal-fired boilers, waste incinerators or cement burning plants may contain trace amounts of hazardous substances such as dust, oxides of sulfur (SOx), oxides of nitrogen (NOx), mercury (Hg), arsenic (As ), cadmium (Cd), lead (Pb), selenium (Se), or combinations of these compounds. If these harmful substances are released into the atmosphere, these substances may be incorporated into the human body and affect human health. These substances also accumulate in lake or ocean fish and shellfish, and these fish and shellfish may have negative effects on humans. Consequently, emission limits for these hazardous substances have been tightened around the world. [0003] In particular, metallic mercury (HgO) is easily released from the flue due to the high vapor pressure of HgO at room temperature...

Claims

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Application Information

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IPC IPC(8): B01D53/64B01D53/86B01D53/32B01D53/78B01D53/56B01D53/50
CPCB01D53/32B01D53/502B01D53/78B01D53/86B01D53/8625B01D53/8665B01D2258/0283B01D53/501B01D53/869B01D2255/806B01D2257/602B01D2258/0233B01D2258/0291F23J15/04F23J2215/60
Inventor 冈本优岛田秀显寺田慎一
Owner KK TOSHIBA
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