A kind of synergistic removal of hg in flue gas 0 and hg in effluent 2+ Methods
A flue gas and removal technology, applied in chemical instruments and methods, separation methods, water/sludge/sewage treatment, etc., can solve the problems of unfavorable mercury removal efficiency of activated carbon, affecting the subsequent use of fly ash, and expensive activated carbon. Achieve the effect of fast adsorption rate, stable structure and low price
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Embodiment 1
[0045] Na 2 S 2 o 3 ·5H 2 O, FeSO 4 ·7H 2 Mix O and S with a molar ratio of 2:2:1 and add them into the autoclave, then add a certain amount of water, react at 200°C for 24h, cool to room temperature, centrifuge, wash with water 3-5 times, 60°C dried under vacuum to obtain FeS 2 Adsorbent with a specific surface area of 2.92 m 2 / g. Weigh FeS 2 Sorbent 50mg, it is sieved after drying. Take particles between 60-80 mesh for experiment. The experimental samples were placed in a cylindrical quartz glass fixed-bed reactor with a length of 400 mm and an inner diameter of 10 mm. The temperature was controlled by a tube furnace, and the temperature was set at 80 °C. Use the VM-3000 mercury detector to measure the mercury concentration in real time, the initial mercury concentration is 68±1g / m 3 . The gas flow of each component is precisely controlled by a mass flow meter, and the total gas flow is 1L / min. In pure N 2 Under atmosphere, within 2h, FeS 2 The average mer...
Embodiment 2
[0047] Weigh 200 mg of activated carbon, dry it and sieve it. Take particles between 60-80 mesh for experiment. The experimental samples were placed in a cylindrical quartz glass fixed-bed reactor with a length of 400 mm and an inner diameter of 10 mm. The temperature was controlled by a tube furnace, and the temperature was set at 80 °C. Use the VM-3000 mercury detector to measure the mercury concentration in real time, the initial mercury concentration is 68±1μg / m 3 . The gas flow of each component is precisely controlled by a mass flow meter, and the total gas flow is 1L / min. In pure N 2 Under the atmosphere, after long-term mercury removal, when the mercury removal efficiency drops to 0%, the mercury adsorption amount is 0.02-0.25mg / g.
Embodiment 3
[0049] 1mol / L of (NH 4 ) 2 S solution was dropped into 1mol / L CuCl 2 In the solution, stir while dripping, let it stand for a while after dripping, filter to obtain a black solid, then wash with water 3-5 times, and then vacuum dry at 160°C for 12 hours to obtain CuS adsorbent with a specific surface area of 28.9 m 2 / g. Weigh 5 mg of CuS adsorbent, dry it and sieve it. Take particles between 60-80 mesh for experiment. The experimental samples were placed in a cylindrical quartz glass fixed-bed reactor with a length of 400 mm and an inner diameter of 10 mm. The temperature was controlled by a tube furnace, and the temperature was set at 125 °C. Use the VM-3000 mercury detector to measure the mercury concentration in real time, the initial mercury concentration is 68±1μg / m 3 . The gas flow of each component is precisely controlled by a mass flow meter, and the total gas flow is 1L / min. In pure N 2 Under the atmosphere, the average mercury removal efficiency of CuS wa...
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