A kind of photocatalyst and its preparation method for removing condensed water trace steam turbine oil

Abstract

The invention discloses a photocatalyst for removing condensed water trace steam turbine oil. The photocatalyst comprises the following components by weight percent: 5-20% of nanometer TiO2 powder, 1.3-7% of dispersing agent, 15-40% of toluene diisocynate, 10-20% of addition agent, 5-15% of foam stabilizer and 20-50% of solvent, wherein the dispersing agent refers to low-molecular wax, the addition agent refers to dihydric alcohol or trihydric alcohol; the foam stabilizer refers to silicon polyether or surface active agent containing -SO3H; the solvent refers to deionized water. Nanometer TiO2 is loaded through polyurethane foam by using a special photocatalyst formula. The obtained load-type photocatalyst is low in density, high in load rate and high in photocatalytic efficiency, and can be recycled, so that the economic applicability is strong.

Description

Technical field [0001] The present invention belongs to a photocatalyst. Specifically, the present invention relates to a photocatalyst for removing condensed water traces of steam turbine oil. Background technique [0002] With the rapid development of the power industry, the requirements for water quality control are becoming more and more stringent. As the main source of feed water, the quality of condensate water directly affects the operating conditions of the boiler. The oil content in the condensate becomes more stringent with the increase of unit parameters. However, due to improper operation or improper turbine shaft sealing system, the effluent water of the condenser often contains trace amounts of steam turbine oil, especially in the commissioning of new power plants. It is often encountered that the leakage of lubricating oil causes the condensate resin to be contaminated, resulting in a decrease in the exchange capacity of the resin; when the oil in the condensed wat...

AI Technical Summary

Problems solved by technology

At present, the main carriers used are hollow glass spheres, wood chips, silicon-aluminum hollow microspheres, etc. Among them, when hollow glass microspheres are used as carriers, they are only used to degrade oil pollution on the water surface, and they are used to load TiO 2 , the loading rate is low; and with epoxy resin as the adhesive, the TiO 2 Adhering to wood chips, it is mainly used for the degradation of crude oil in water. At present, there is no application example in the removal of trace turbine oil in condensed water; the use of silane coupling agent to combine TiO 2 Coupling on silica-alumina hollow microspheres, the photocatalytic degradation conditions are difficult to achieve in industrial use

[0010] In summary, the photocatalytic degradation method of TiO 2 With its excellent performance, it becomes a good semiconductor for photocatalysts, but as TiO 2 A good carrier for TiO, there is still no ideal material, therefore, to invent a kind of TiO 2 As a semiconductor, a photocatalyst with good load capacity and strong economic applicability to remove condensed water and trace turbine oil is very necessary for the safe operation of the entire generator set

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