Novel process of rock debris wastewater treatment

Abstract

The invention provides a novel process of rock debris wastewater treatment. The process comprises a pretreatment unit, a physicochemical treatment unit, a biochemical treatment unit and a deep treatment unit, and is characterized in that the pretreatment unit is formed by a water collecting tank, three-stage oil insulation and heating demulsification parts; the physiochemical treatment unit is formed by coagulation, air flotation and ultrafiltration; the biochemical treatment unit is formed by hydrolytic acidification and aerobiotic treatment; the deep treatment unit is formed by Fenton oxidation and resin adsorption. The novel process can be used for high oil content and high pollution load boring rock debris wastewater treatment, the treated water can achieve A-level standard of domestic sewage comprehensive emission and can be used as green water and water reuse, so that the treatment rate of boring rock debris wastewater can be improved, and the situation of sewage drainage in the oil production process can be solved.

Description

technical field [0001] The invention relates to providing a sewage treatment technology, especially a novel process for oil field sewage and cuttings waste water treatment. Background technique [0002] With the vigorous development of the petroleum industry, the amount of oil and natural gas extraction has intensified, which has caused great pressure on the environment, especially during the drilling process, the underground leakage and discharge of drilling cuttings waste water have caused serious pollution to groundwater and surface water. The surrounding ecology has adverse effects, so the pollution control of drilling cuttings wastewater has become a difficult and urgent task in the clean production of oil and gas field drilling. Drilling cuttings wastewater mainly comes from the drilling process, downhole operation process and oil and gas recovery process. The water quality of drilling wastewater varies greatly with the drilling depth and geological conditions. The cha...

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Problems solved by technology

[0003] ①Drilling wastewater is highly dispersed, and the water quality and quantity vary greatly;

[0006] ④ High salinity, because it is an offshore platform operation, the flushing water is mostly seawater, and the salt content in the wastewater is extremely high;

[0007] ⑤Extremely high environmental pollution load

[0008] There are many drilling cuttings wastewater treatment processes currently in use, but a single treatment unit cannot solve the problem of drilling cuttings wastewater treatment. Only through combined process treatment can the drilling wastewater be discharged up to the standard

However, the water quality and quantity of drilling wastewater vary greatly, and the water quality components are complex. Generally, it is necessary to develop a corresponding combined treatment process for the specific water quality of drilling cuttings wastewater.

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