Device for treating oily wastewater by photocatalytic-oxidation composite diatomite-based nano-ceramics and method
A technology of photocatalytic oxidation and composite diatomite, which is applied in the field of water treatment, can solve the problems of increased floor area and maintenance cost, secondary pollution, and repeated times, so as to save the floor area and cost of treatment, and reduce the treatment cost. Cost, the effect of improving processing efficiency
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[0050] Example 1:
[0051] It is taken from an oil-containing wastewater from an oil field. The oil-containing wastewater has an oil content of 10%, a pH of 9.28, and a COD of 1263 mg / L. The relevant indicators are not up to standard. The oily wastewater is first filtered by a filter with a pore size of 100 μm, and then enters the photocatalytic oxidation composite diatomite-based nano-ceramic 1 system from the water inlet 4. The compressed air in the reaction system enters the aeration ceramic 6 from the air inlet 5, and aeration The ceramic is a quartz aerated ceramic with a flow rate of 100L / h. The ultraviolet lamp 2 uses a low-pressure mercury lamp with a dominant wavelength of 254nm. The chemical composition of the diatomite-based nano ceramic 1 is The ceramic aperture is 0.5 μm, the nano-photocatalytic material supported on the ceramic surface is titanium dioxide photocatalytic powder, the photocatalytic oxidation composite nano-ceramic is fixed in the grid 11, and the gri...
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[0052] Example 2
[0053] Taken from the drilling fluid of an offshore drilling platform, the relevant physical and chemical parameters of the drilling fluid: oil content of 12%, pH value of 6.89, COD of 15000mg / L, solid suspended solids of 500mg / L, etc. The relevant indicators have not reached GB 4914-2008 The emission standards in "Limits for Pollutant Discharge Concentrations from Offshore Oil Exploration and Development". The oily wastewater first undergoes a pretreatment step to remove large solids, and enters the photocatalytic oxidation composite diatomite-based nano-ceramic 1 system from the water inlet 4. The compressed air in the system enters the aeration ceramic 6 from the air inlet 5, and aeration The ceramic is quartz aerated ceramics, the aeration flow rate is 150L / h, the ultraviolet light source 2 uses a 254nm low-pressure mercury lamp, and the main chemical composition of the diatomite-based nano-ceramic 1 is The ceramic pore size is 1μm, and the photocatalyst s...
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