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Photocatalytic flue gas mercury removal device in power plant chimney

A technology of photocatalysis and flue gas, which is applied in the direction of gas treatment, chemical instruments and methods, and separation of dispersed particles, can solve the problems of limited mercury removal efficiency, and achieve the goal of increasing adsorption and photocatalytic reaction efficiency, improving efficiency, and increasing efficiency Effect

Pending Publication Date: 2019-03-22
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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Problems solved by technology

A Chinese patent (CN107694334A) discloses a photocatalytic mercury removal device in a chimney, in which a rotatable corrugated metal sheet loaded with titanium dioxide / charcoal is used, and the UV lamp unit is arranged on the upper or lower part thereof, and the flue gas passes through it with the active catalyst The increase of contact time and area is small, and the improvement of mercury removal efficiency is relatively limited

Method used

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  • Photocatalytic flue gas mercury removal device in power plant chimney
  • Photocatalytic flue gas mercury removal device in power plant chimney

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Embodiment

[0028] Such as figure 1 , 2 As shown, a photocatalytic flue gas mercury removal device in a power plant chimney includes a housing, a UV ultraviolet lamp unit disposed in the housing, and a photocatalytic reaction unit disposed in the housing. The photocatalytic reaction unit consists of a plurality of metal sheets 6 Composition, the metal flakes 6 are radially arranged in a "spider web" structure centered on the axis of the housing, and the surface of the metal flakes 6 is loaded with a catalyst. In this embodiment, the photocatalyst is TiO 2 / BiOIO 3 Specifically, different metal sheets 6 are connected and arranged uniformly and symmetrically around the center of the shell to form a "spider web" radiation structure, which can greatly increase the contact time and contact area when the smoke passes through the structure, and the "spider The "mesh" structure has little resistance to the flow of smoke.

[0029] The shell is cylindrical and consists of an inner shell 5 and an...

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Abstract

The invention relates to a photocatalytic flue gas mercury removal device in a power plant chimney. The mercury removal device comprises a shell, a UV lamp unit and a photo-catalytic reaction unit, wherein the UV lamp unit is arranged on the shell; the photo-catalytic reaction unit is arranged in the shell; the photo-catalytic reaction unit comprises multiple metal sheets; the metal sheets are arranged into a 'spider web' structure in a radial direction by taking the axis of the shell as the center; a catalyst is supported on the surface of the metal sheets. Compared with the prior art, the device has a large contact area with the flue gas, the flue gas and the nano photocatalyst can be in contact and react in more time, and the flue gas treatment efficiency can be effectively improved.

Description

technical field [0001] The invention relates to a photocatalytic flue gas mercury removal device, in particular to a photocatalytic flue gas mercury removal device in a power plant chimney. Background technique [0002] The rapid development of human society is inseparable from the supply and consumption of energy. In my country's energy consumption structure, the amount of coal burning accounts for about 70% of the primary energy, and a large amount of heavy metals are inevitably produced in the process of coal burning and other energy consumption. (Hg 0 ) and other pollutants cause environmental damage. Heavy metals such as mercury have strong toxicity, volatility, and bioaccumulation characteristics, which are extremely harmful to the environment. In recent years, the control of heavy metals (Hg 0 ) and other pollutants have attracted more and more attention. my country also issued relevant national standards in 2011, requiring that the mercury emissions in coal-fired f...

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Application Information

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IPC IPC(8): B01D53/86B01D53/00B01D53/74B01D53/64
CPCB01D53/007B01D53/74B01D53/8665B01D2259/804B01D2257/602B01D2258/0283
Inventor 吴江贾焘何平王健敏朱毅佳齐雪梅吴强赵晓燕周敏吴嘉曦
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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