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Fly ash mercury removal device and mercury removal method

A fly ash and mercury removal technology, which is applied in separation methods, chemical instruments and methods, transportation and packaging, etc., can solve the problems of cyclic accumulation of mercury concentration in fly ash

Inactive Publication Date: 2018-07-03
中国科学院北京综合研究中心
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problem that the concentration of mercury in fly ash is continuously accumulated in the existing new dry process cement production process, the present invention adopts the method of combining thermal analysis, plasma oxidation and environmental protection functional materials to provide a new fly ash mercury removal device and mercury removal methods

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  • Fly ash mercury removal device and mercury removal method

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Embodiment Construction

[0021] The present invention will be described in detail below in combination with specific embodiments.

[0022] Such as figure 1 As shown, the fly ash mercury removal device includes a thermal analysis unit 1 , a plasma reactor 13 and an adsorption unit 15 .

[0023] In this embodiment, the thermal analysis unit 1 is a drum-type heating furnace as an example. The drum 17 is made of heat-resistant stainless steel, and electric heating is adopted. The electric heating wire 18 is arranged on the outer periphery of the drum 17 . The maximum heating temperature of the heating furnace is set to 800°C, and the drum 17 can be in direct contact with the material. After the material leaves the furnace, it is naturally cooled in the cooling section of the drum 17. The solid is discharged through the receiving port 2, and the dusty gas is discharged through the exhaust port 3. The thermal desorption unit 1 may also include additives, such as at least one of sublimated sulfur, sodium su...

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Abstract

The invention provides a fly ash mercury removal device which comprises a thermal desorption unit, a plasma reactor and an adsorption unit, wherein the thermal desorption unit is used for volatilizingmercury in fly ash to form gaseous mercury; the plasma reactor is used for oxidizing gaseous mercury to form oxidative mercury; and the adsorption unit is used for adsorbing oxidative mercury. The invention further provides a fly ash mercury removal method. By adoption of the fly ash mercury removal device and method provided by the invention, a thermal desorption process of the fly ash and a super-oxidation process of mercury can be organically combined, the efficient desorption of mercury from the fly ash can be ensured, and then mercury can be efficiently removed from the fly ash.

Description

technical field [0001] The invention relates to the field of atmospheric environment treatment, in particular to a device for performing mercury removal pretreatment on fly ash co-processed with cement. Background technique [0002] The cement industry, coal burning, non-ferrous metal smelting, waste incineration, chemical industry and other industries are the main pollution sources of mercury-containing waste gas. "Emission Standards of Air Pollutants for the Cement Industry" (GB4915-2004) has a 0.05mg / m2 standard for mercury emissions of air pollutants in this industry 3 The "Cement Kiln Co-processing Solid Waste Pollution Control Standard" (HJ 662-2013) stipulates that the mercury content in the solidified waste must be less than 0.23mg / kg. However, the cement clinker production in my country generally adopts new dry process. In addition to the mercury emitted with the flue gas during the cement clinker production process, some mercury is fixed in the cement clinker and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00B09B5/00B01D53/32B01D53/02B01D53/00
CPCB01D53/002B01D53/02B01D53/32B09B5/00B01D2257/602B09B2101/30B09B3/40
Inventor 陈扬李震冯钦忠姜晓明魏石豪张正洁
Owner 中国科学院北京综合研究中心
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