Oleophylic ceramsite adopting oil-based drilling cutting residues obtained after thermal decomposition and preparation method of oleophylic ceramsite

Abstract

The invention discloses ceramsite with an oleophylic property. The different proportions of oil-based drilling cutting residues obtained after thermal decomposition, potassium feldspar, bauxite and bentonite are utilized, the performance of the ceramsite can be improved by adding a small amount of waste glass powder, and the prepared ceramsite has the oleophylic property through loading of an aluminic acid ester coupling agent. The ceramsite with the oleophylic property is large in compressive strength and good in acid and alkali corrosion resistance, and has the oleophylic property, powder is not likely to fall off, backflushing regeneration of the ceramsite is easy, hardening is avoided, and a good effect can be achieved when the ceramsite serves as a filtering medium. The ceramsite can be used for treating oily sewage and production sewage or printing and dyeing wastewater; when the ceramsite is used for treating the oily sewage, the oil removal rate is 85% or above, and the suspended solid removal rate is 80% or above.

Description

technical field [0001] The invention belongs to the technical field of resource utilization of waste produced in shale gas exploration and development for environmental protection, and in particular relates to an oil-friendly ceramsite and a preparation method thereof by thermally decomposing oil-based drilling cuttings residues. Background technique [0002] Oil-based drilling cuttings are a kind of solid waste produced in the process of shale gas exploration and development. It is bulky and complex in composition. In addition to a large amount of residual oil, it also contains toxic substances such as benzene series, phenols, anthracene, and pyrene. , a large number of pathogenic bacteria, parasites, copper, chromium, lead and other heavy metals, salts and polychlorinated biphenyls and other refractory toxic and harmful substances. If oil-based drilling cuttings are discharged without effective treatment, it will not only occupy a large amount of land, but also cause envir...

AI Technical Summary

Problems solved by technology

However, at present, the main materials of water treatment filter materials are natural resources such as clay and shale, which not only restricts the production of raw materials, but also causes harm to the local environment

Although Publication Nos. CN102659390A, CN102584172A, CN104098321A, etc. are all for resource utilization of sludge, some need to add a certain amount of clay or sodium carboxymethylcellulose to increase viscosity, and some need to add chromium slag to reduce sintering temperature and increase pottery. Granular strength; moreover, the prepared ceramsite is and the prepared ceramsite is formed by foaming, the compressive strength is low, and it does not have lipophilic properties

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