A kind of recycling method of waste water produced by mixing sulfur transfer agent and FCC catalyst
A technology of sulfur transfer agent and production wastewater, which is applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. It can solve the problems of affecting wear resistance, complicated operation, and production wastewater that cannot be recycled. Use and other issues
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preparation example Construction
[0028] The preparation method of the sulfur transfer agent is generally to first gel the magnesium hydroxide, magnesium oxide, alumina, clay, etc. as the carrier material in the gelling kettle, and then form the carrier microsphere particles similar to the catalytic cracking catalyst by spray drying. , the carrier microsphere particles are roasted, and then the active components mainly including rare earth elements such as cerium are loaded on the carrier by impregnation in an impregnation tank, and then dried. According to the present invention, the wastewater from the production of the sulfur transfer agent can be all wastewater generated during the production of the sulfur transfer agent, such as wastewater generated during immersion, wherein the pH value of the wastewater is about 5-8, and generally contains object (RE 2 o 3 ) in the amount of 1-20 grams / liter of rare earth elements, the rare earth elements in the wastewater can exist in the state of ions or in the state ...
Embodiment 1
[0039] This example illustrates the mixed utilization method of the sulfur transfer agent production wastewater and the catalyst production wastewater of the present invention.
[0040] In terms of volume flow, the mixing ratio of sulfur transfer agent production wastewater to catalyst production wastewater is 1:1. Add 5 g of sulfur transfer agent fine powder roasted at 650° C. for 1.5 h to each liter of mixed wastewater, stir and mix, and control the pH value to 4 with hydrochloric acid. The wastewater suspension is pumped into the hydrocyclone, the inlet pressure is 0.4MPa, and the volume flow ratio of underflow and overflow is 1:10. The clear liquid phase at the overflow outlet is transported to the inlet of the tubular centrifuge, the centrifuge rotates at 15000rpm, the solid phase sediment is removed every 1 hour, and the particulate matter content of the clear liquid phase is 0.10g / L. The supernatant liquid is sent to the carrier impregnation tank, which is used for the...
Embodiment 2
[0042] This example illustrates the mixed utilization method of the sulfur transfer agent production wastewater and the catalyst production wastewater of the present invention.
[0043] In terms of volume flow, the mixing ratio of sulfur transfer agent production wastewater to catalyst production wastewater is 2:1. Add 4g of unroasted sulfur transfer agent fine powder to every liter of mixed wastewater, stir and mix, and control the pH value to 4.5 with hydrochloric acid. The wastewater suspension is pumped into the hydrocyclone, the inlet pressure is 0.4MPa, and the volume flow ratio of underflow and overflow is 1:10. The clear liquid phase at the overflow outlet is transported to the inlet of the tubular centrifuge, the centrifuge rotates at 12000rpm, the solid phase sediment is removed every 50min, and the particulate matter content of the clear liquid phase is 0.69g / L. The supernatant liquid is sent to the carrier impregnation tank, which is used for the excess impregnati...
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