A filter bag/filter element for removing mercury in flue gas and its preparation method and application
A filter bag and flue gas technology, which is applied in separation methods, chemical instruments and methods, transportation and packaging, etc., can solve the difficulty of efficient fixed removal of full-form mercury, the effect of mercury remover on the reuse of smoke and dust, equipment investment and operating costs. High problems, to achieve the effect of superior mercury removal performance, large market application prospects, and reduced construction and operating costs
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Embodiment 1
[0035] The polyphenylene sulfide plastic fiber needle-punched felt was cut into a square with an area of 10cm×10cm, a thickness of 2.2mm, and a weight of 4.89g. 0.9 g of sodium selenite and 6.2 g of reduced glutathione were simultaneously added to 60 mL of the solution and stirred until completely dissolved to obtain a selenium-containing mixed solution. The needled felt was immersed in a selenium-containing mixed solution, stirred for 10 minutes at a time, and sonicated for 10 minutes. An alkali was added to the solution to adjust pH=8 to reduce selenite to elemental selenium, and continued stirring for a second time for 8 hours until the selenium in the solution was reduced and supported in the solution. The selenium-loaded felt was obtained on the needle-punched felt, and the selenium-loaded felt was vacuum-dried at 110°C for 8 hours, and then sprayed with PTFE film and protective liquid (30% antistatic agent, 40% antioxidant, and 30% antibacterial agent) for surface treat...
Embodiment 2
[0037]The polyester fiber needle-punched felt is cut into a square with an area of 10cm×10cm, a thickness of 2.4mm, and a weight of 4.77g. 0.46 g of ammonium selenite and 17.04 mL of sulfurous acid were simultaneously added to 80 mL of the solution and stirred until completely dissolved to obtain a selenium-containing mixed solution. The needled felt was immersed in a selenium-containing mixed solution, stirred for 5 min at a time, and sonicated for 20 min. Add alkali to the solution to adjust pH=8.5 to reduce selenite to elemental selenium, and continue to stir for a second time for 12 h until the selenium in the solution was reduced and supported in the solution. The selenium-loaded felt body was obtained on the needle-punched felt, and the selenium-loaded felt body was vacuum-dried at 120°C for 6 hours and then coated with porous PU and protective liquid (antistatic agent 30%, antibacterial agent 30%, coupling agent 20%, hydrophobic agent 20% ) spray surface treatment, th...
Embodiment 3
[0039] The polytetrafluoroethylene fiber fiber needle-punched felt is cut into a square with an area of 1 m × 1 m, a thickness of 1.8 mm, and a weight of 557 g. 135 g of calcium selenite and 496 g of reduced glutathione were simultaneously added to the 5 L solution and stirred until completely dissolved to obtain a selenium-containing mixed solution. The needled felt was immersed in a selenium-containing mixed solution, stirred for 5 min at a time, and sonicated for 15 min. Add alkali to the solution to adjust pH=9 to reduce selenite to elemental selenium, and continue to stir for a second time for 6 h until the selenium in the solution was reduced and supported in the solution. The selenium-loaded felt was obtained on the needle-punched felt, and the selenium-loaded felt was vacuum-dried at 120°C for 6 hours, and then the porous PU film and protective solution (20% antistatic agent, 10% antibacterial agent, 40% coupling agent, and 30% hydrophobic agent) were applied. ) spra...
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