Recovery and reuse method of waste titanium-based vanadium-series plate type SCR catalyst
An SCR catalyst and titanium-based vanadium-based technology, which is applied in the field of recycling and reuse of waste titanium-based vanadium-based flat SCR catalysts, can solve the problems of waste of resources and high treatment costs, and achieve the effect of reducing treatment costs.
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Embodiment 1
[0026] (1) The waste titanium-based vanadium-based flat-plate SCR catalyst module is soot-blown and unloaded.
[0027] First, use 0.7MPa oil-free dry compressed air to blow for 30 minutes to remove the dust accumulated on the surface and in the pores; disassemble the iron sheet of the catalyst module and take out the catalyst unit body, and then peel off the catalyst material from the stainless steel mesh through the unloading equipment.
[0028] (2) the catalyst processed in step (1) is removed through a vibrating screen to remove the dust on the surface of the scrap, and then the dust attached to the inside of the scrap is further removed by spraying;
[0029] (3) Mix the crushed material processed in step (2) with deionized water to prepare a 25% (w%) slurry, which is further pulverized by a sand mill or a ball mill until the D50 is about 1.2 μm.
[0030] (4) Bubbling the slurry treated in step (3) in 1.0 mol / L sodium hydroxide solution for 0.5 h.
[0031] (5) Soaking and ...
Embodiment 2
[0034] (1) The waste titanium-based vanadium-based flat-plate SCR catalyst module is soot-blown and unloaded. First, use 1.0MPa oil-free dry compressed air to blow for 20 minutes to remove the dust accumulated on the surface and in the pores; disassemble the iron sheet of the catalyst module and take out the catalyst unit body, and then peel off the catalyst material from the stainless steel mesh through the unloading equipment.
[0035] (2) the catalyst processed in step (1) is removed through a vibrating screen to remove the dust on the surface of the scrap, and then the dust attached to the inside of the scrap is further removed by spraying;
[0036] (3) Mix the crushed material processed in step (2) with deionized water to prepare a 25% (w%) slurry, which is further pulverized by a sand mill or a ball mill until the D50 is about 1.2 μm.
[0037] (4) Bubbling the slurry treated in step (3) in 0.4 mol / L sodium hydroxide solution for 1.5 h.
[0038] (5) Soaking and bubbling ...
Embodiment 3
[0041] (1) The waste titanium-based vanadium-based flat-plate SCR catalyst module is soot-blown and unloaded. First, blow with 0.7MPa oil-free dry compressed air for 10 minutes to remove the dust accumulated on the surface and in the pores; disassemble the iron sheet of the catalyst module and take out the catalyst unit body, and then peel off the catalyst material from the stainless steel mesh through the unloading equipment.
[0042] (2) the catalyst processed in step (1) is removed through a vibrating screen to remove the dust on the surface of the scrap, and then the dust attached to the inside of the scrap is further removed by spraying;
[0043] (3) Mix the crushed material processed in step (2) with deionized water to prepare a 25% (w%) slurry, which is further pulverized by a sand mill or a ball mill until the D50 is about 1.2 μm.
[0044] (4) Bubbling the slurry treated in step (3) in 0.6 mol / L potassium hydroxide solution for 1.0 h.
[0045] (5) Vacuum filter the trea...
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