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Flue gas demercuration, desulfurization and denitration adsorbent and preparation method thereof

A desulfurization, denitrification, and adsorbent technology, which is applied in separation methods, chemical instruments and methods, and other chemical processes, can solve the problems of high economic cost and low adsorption efficiency, and achieve simple production process, high efficiency, and realization of reuse. Effect

Inactive Publication Date: 2014-01-22
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a flue gas demercury, desulfurization and denitrification adsorbent, which is based on MnO 2 and V 2 o 5 Combined impregnation with modified red mud, and provides the preparation method of the adsorbent, which solves the problems of high economic cost in the existing technology of demercury, desulfurization, and denitrification technologies alone, and the low adsorption efficiency of directly using red mud as an adsorbent

Method used

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  • Flue gas demercuration, desulfurization and denitration adsorbent and preparation method thereof
  • Flue gas demercuration, desulfurization and denitration adsorbent and preparation method thereof

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Embodiment 1

[0028] Step 1. Put the red mud raw material in a ventilated place to dry naturally for 36 hours, transfer the dried red mud to a muffle furnace at 400°C for 3.5 hours, and then crush it after cooling and pass through a 150-mesh sieve;

[0029] Step 2. Add 0.25mol / L hydrochloric acid solution and the red mud obtained in step 1 to the reactor at a liquid-solid ratio of 20mL / g and place it in a constant temperature bath at 80°C for 3 hours, then mix the red mud-hydrochloric acid solution at 9000r / g Min centrifuge for 30min, use filter paper to filter out the red mud;

[0030] Step 3, washing the red mud obtained in step 2 in clean water, and then filtering, and repeating this 2 times;

[0031] Step 4. Put the red mud obtained in Step 3 in a drying oven and keep it at 105°C for 18 hours;

[0032] Step five, weigh 1.33gMn(NO 3 ) 2 and 1.74gNH 4 VO 3 , dissolved in 50mL deionized water, placed in a constant temperature bath at 80°C and stirred at a constant speed to obtain a mi...

Embodiment 2

[0036] Step 1. Put the red mud raw material in a ventilated place to dry naturally for 36 hours, transfer the dried red mud to a muffle furnace at 400°C for 3.5 hours, and then crush it after cooling and pass through a 150-mesh sieve;

[0037] Step 2. Add 0.25mol / L hydrochloric acid solution and the red mud obtained in step 1 to the reactor at a liquid-solid ratio of 20mL / g and place it in a constant temperature bath at 80°C for 3 hours, then mix the red mud-hydrochloric acid solution at 9000r / g Min centrifuge for 30min, use filter paper to filter out the red mud;

[0038]Step 3, washing the red mud obtained in step 2 in clean water, and then filtering, and repeating this 2 times;

[0039] Step 4. Put the red mud obtained in Step 3 in a drying oven and keep it at 105°C for 18 hours;

[0040] Step five, weigh 2.06g Mn(NO 3 ) 2 and 1.32g NH 4 VO 3 , dissolved in 50mL of deionized water, placed in a constant temperature bath at 80°C and stirred at a constant speed to obtain ...

Embodiment 3

[0044] Step 1. Put the red mud raw material in a ventilated place to dry naturally for 36 hours, transfer the dried red mud to a muffle furnace at 400°C for 3.5 hours, and then crush it after cooling and pass through a 150-mesh sieve;

[0045] Step 2. Add 0.25mol / L hydrochloric acid solution and the red mud obtained in step 1 to the reactor at a liquid-solid ratio of 20mL / g and place it in a constant temperature bath at 80°C for 3 hours, then mix the red mud-hydrochloric acid solution at 9000r / g Min centrifuge for 30min, use filter paper to filter out the red mud;

[0046] Step 3, washing the red mud obtained in step 2 in clean water, and then filtering, and repeating this 2 times;

[0047] Step 4. Put the red mud obtained in Step 3 in a drying oven and keep it at 105°C for 18 hours;

[0048] Step five, weigh 1.79g Mn(NO 3 ) 2 and 2.08 g of NH 4 VO 3 , dissolved in 30mL of deionized water, placed in a constant temperature bath at 80°C and stirred at a constant speed to ob...

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Abstract

The invention discloses a flue gas demercuration, desulfurization and denitration adsorbent and a preparation method thereof. The adsorbent is red mud modified by combination of MnO2 and V2O5, wherein the mass of MnO2 and V2O5 accounts for 5-15 percent of the total mass of the adsorbent, and the molar ratio of Mn / V in the MnO2 and V2O5 is 0.5-2.0. The preparation method comprises the following steps: heating and immersing activated red mud in the Mn(NO3)2 and NH4VO3 mixed solution for 8-12 hours; drying, roasting, crushing and screening. The flue gas demercuration, desulfurization and denitration adsorbent prepared by the method is simple in preparation method, low in raw material cost, remarkable in demercuration, desulfurization and denitration effect and the like.

Description

technical field [0001] The invention relates to the fields of comprehensive utilization of aluminum-making industrial waste and flue gas demercury, desulfurization and denitrification, in particular to a flue gas demercury, denitrification and desulfurization adsorbent and a preparation method thereof. Background technique [0002] my country is a country where coal is the main energy source, and coal will produce a large amount of pollutants during the combustion process. According to statistics, 90% of sulfur dioxide, 60% of nitrogen oxides, and 40% of mercury in my country come from coal combustion. SO in coal flue gas 2 and NO X Mercury is the chief culprit of environmental pollution such as acid rain and photochemical smog, while mercury is a toxic substance with permanent accumulation in organisms and biological chains, and is easily absorbed by the skin, respiratory tract and digestive tract. These environmental pollution problems have seriously endangered human exi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/06B01J20/30B01D53/02
Inventor 黄亚继严玉朋王昕晔邵志伟杨高强刘长奇
Owner SOUTHEAST UNIV
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