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Preparation method of metal mercury adsorbent, adsorbent and regeneration method

An adsorbent and metal mercury technology, which is applied in the field of preparation of metal mercury adsorbents, can solve the problems of difficulty in removing elemental mercury, difficult to regenerate, large consumption of adsorbents and the like, and achieves the effect suitable for industrial application.

Inactive Publication Date: 2018-08-14
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Claims
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Problems solved by technology

Among them: divalent mercury can be removed through the desulfurization tower, particulate mercury can be captured in the dust collector, but the removal of elemental mercury is particularly difficult
[0003] At present, mercury removal by injection method will bring pressure to the tail dust collector and affect its performance
Although the fixed bed reactor can avoid the impact on the tail dust collector, it consumes a lot of absorbent, is not easy to regenerate, and the cost of mercury removal is high.
When using catalysts to remove mercury, there are clear restrictions on the reaction temperature range

Method used

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  • Preparation method of metal mercury adsorbent, adsorbent and regeneration method
  • Preparation method of metal mercury adsorbent, adsorbent and regeneration method
  • Preparation method of metal mercury adsorbent, adsorbent and regeneration method

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Embodiment Construction

[0036] In order to solve the problems existing in the prior art, the present invention provides a method for preparing a metallic mercury adsorbent, the adsorbent and a regeneration method. The metallic mercury adsorbent prepared by using the preparation method has high mercury removal efficiency, and the metallic mercury After the adsorbent is regenerated by the regeneration method, it can still maintain a high mercury removal efficiency, so it is more suitable for application.

[0037] For further elaborating the technical means and effects that the present invention takes to reach the intended invention purpose, below in conjunction with accompanying drawing and preferred embodiment, to the preparation method of metal mercury adsorbent proposed according to the present invention, this adsorbent and this adsorbent The regeneration method after saturation, its specific implementation, structure, characteristics and efficacy are described in detail below. In the following desc...

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Abstract

The invention discloses a preparation method of a metal mercury adsorbent, the adsorbent and a regeneration method of the adsorbent, and belongs to the technical field of chemical adsorption. The preparation method comprises the following steps: dissolving graphene oxide, at least one compound of elements in the third period and a reducing agent together in an ethanol solution, and carrying out full reactions to obtain a first intermediate product; filtering the first intermediate product to obtain a filtrate; mixing the filtrate with an adhesive, and sequentially carrying out extrusion molding and first drying to obtain a molded material; impregnating the molded material with a solution of elements of the group VI, and carrying out second drying to obtain a second intermediate product; and activating the second intermediate product at a CO2 atmosphere so as to obtain the metal mercury sorbent, wherein the activation temperature is 150-200 DEG C. At the same time, a certain regeneration method can be applied to regenerating an already saturated metal mercury adsorbent.

Description

technical field [0001] The invention relates to the technical field of chemical adsorption, in particular to a preparation method of a metal mercury adsorbent, the adsorbent and a regeneration method. Background technique [0002] With the massive burning of fossil fuels, the problem of mercury pollution is becoming more and more serious. Among them, the flue gas produced by coal-fired power stations is an important source of mercury pollution. There are three main forms of mercury in the flue gas of coal-fired power plants, including gaseous elemental mercury, divalent mercury and particulate mercury. Among them: divalent mercury can be removed through the desulfurization tower, particulate mercury can be captured in the dust collector, but the removal of elemental mercury is particularly difficult. [0003] At present, mercury removal by spraying will bring pressure to the tail dust collector and affect its performance. Although the fixed bed reactor can avoid the impac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/02B01J20/30B01J20/04B01J20/34
CPCB01D53/02B01D2257/602B01D2258/0283B01J20/0296B01J20/04B01J20/34B01J20/3433B01J20/3483
Inventor 刘忠王步云程喜仁黄争灿张伊黎
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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