Elementary substance mercury mineral adsorbent and preparation method thereof

An adsorbent and elemental mercury technology, applied in the fields of energy and environment, can solve the problems affecting the commercial value of fly ash in power plants, the limited promotion of carbon-based adsorbents, and the large amount of utilization, achieving abundant reserves, easy operation, and simple preparation process. Effect

Inactive Publication Date: 2016-01-06
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In view of the development status of mercury removal technology at home and abroad, the relatively mature and recognized elemental mercury mineral adsorbent for coal-fired flue gas in the world is prepared with activated carbon as the carrier, especially the modified activated carbon can reach more than 90% elemental mercury. Mercury efficiency, but

Method used

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  • Elementary substance mercury mineral adsorbent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The solvent is: deionized water

[0032] The chemical modifier is: copper bromide

[0033] Copper bromide: medical stone (mass ratio) 1:3

[0034] Weigh 8g of copper bromide particles and put them in a reaction vessel, add 500ml of deionized water and stir with a glass rod until the solute is completely dissolved, slowly add 30g of 300 mesh medical stone ore powder during continuous stirring, and then magnetically stir at 70°C for 4 Hours, after cooling, use a vacuum filter to separate the solid from the liquid, and put the obtained solid in a drying oven at 80°C to dry for 12 hours. After drying, grind it into a 300-mesh powder to obtain a medical stone modified by copper bromide The elemental mercury mineral adsorbent, the content of copper bromide in the adsorbent is measured to be 9.12%, and the mercury removal efficiency of the adsorbent can reach 98.6%.

Embodiment 2～10

[0036] The chemical modifier type, proportioning and process parameters used in Examples 2-10 are as follows:

[0037]

[0038] The adsorbent preparation method used in Examples 2-10 is carried out according to the specific data shown in the above table and with reference to Example 1.

example 2

[0039] The elemental mercury mineral adsorbent obtained by copper bromide modified medical stone obtained in Example 2 has a measured copper bromide content of 0.91% in the adsorbent, and the mercury removal efficiency of the adsorbent can reach 88.1%.

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Abstract

The invention discloses elementary substance mercury mineral adsorbent with natural ore such as medical stone as carriers, and a preparation method of the elementary substance mercury mineral adsorbent. The method mainly includes the steps of adding the carriers to a prepared mechanical modification solution to be soaked for about 4 fours, conducting filtering and drying, grinding on the carriers to the required granularity (60 meshes to 500 meshes), and obtaining the elementary substance mercury mineral adsorbent. Chemical modification agents are any one of cupric bromide, copper chloride, sodium bromide, potassium bromide, potassium iodide, elemental sulfur and the like. The carriers are medical stone which has good structural performance, and is porous, large in surface area, easy to modify and capable of effectively removing elemental mercury in coal-fired fuel gas without influencing commercial value of fly ash. The modified mineral adsorbent is abundant in reserve, low in price and easy to prepare, and is an environment-friendly mineral material.

Description

technical field [0001] The invention specifically relates to a preparation method of an elemental mercury mineral adsorbent with medical stone as a carrier. The elemental mercury mineral adsorbent is mainly used for the removal of elemental mercury in various mercury-containing tail gases, especially for the removal of elemental mercury in coal-fired power plants and waste incineration plants, and does not affect the commercial value of fly ash in power plants. and the environment field. Background technique [0002] Mercury, as a heavy metal pollutant, has high volatility, great toxicity, persistence, long-distance transport and bioaccumulation, and has great destructive power to human health and social environment. In recent years, it has gradually attracted domestic and foreign scholars. attention and become a research hotspot. Due to the global nature of mercury emissions and pollution, many countries in the world have imposed corresponding restrictions on mercury emis...

Claims

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Application Information

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IPC IPC(8): B01J20/10B01J20/30
Inventor 张军营刘欢赵永椿
Owner HUAZHONG UNIV OF SCI & TECH
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