Mobile well flushing waste water processing system

A wastewater treatment system and technology of a treatment system, applied in the direction of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve problems such as inconvenient operation and operation, low treatment efficiency, and long process , to achieve the effect of saving equipment investment and operating costs, reducing COD content, and accurate feeding

Active Publication Date: 2015-05-13
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The invention avoids the problems of low processing efficiency, long process, many equipments, inconvenient operation and operation in the prior art

Method used

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  • Mobile well flushing waste water processing system
  • Mobile well flushing waste water processing system

Examples

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Embodiment 1

[0027] Such as figure 1 As shown, the mobile well-flushing wastewater treatment system of the present invention is used to treat the well-flushing wastewater of an oilfield. During the well washing process, the quality of the effluent water from the well washing wastewater changes with time. When the water is first spouted, the water quality is relatively clear. After the peak, the water quality gradually improved again. For the influent water in this treatment, the timing starts from the well flushing, and the water inlet of the grit chamber is sampled at intervals of 30 minutes. At the same time, the readings of the oil in water online analyzer are recorded until the well flushing ends after 3 hours. The treated effluent is introduced into the collection tank for recycling. Each influent sample was analyzed for suspended matter content, and each effluent sample was analyzed for oil content and suspended matter content. After all the influent samples were mixed, the COD co...

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Abstract

The invention discloses a mobile well flushing waste water processing system. According to the mobile well flushing waste water processing system, sand settling-high efficiency floating-magnetic separation combined process is adopted to process well flushing waste water, and mud cake obtained via magnetic separation is subjected to overlapping type dewatering. The mobile well flushing waste water processing system is high in processing efficiency; multistage filtering or multistage air floatation equipment is not needed; using of a large amount of backwashing water and changing of filling materials are avoided; and continuous processing can be realized. No filtering equipment is used; removing effect of oil and suspended materials is excellent; real-time monitoring on oil content of water can be realized; automatic adjusting on adding amount of flocculating agents is realized; and the floating process is high in efficiency and is reliable. Water processed by using the mobile well flushing waste water processing system is capable of reaching water quality indexes of oil field injection water quality standards and discharged water quality standards; and sludge size is reduced by processing mud cake, which is obtained via magnetic separation, using a sludge water extractor.

Description

technical field [0001] The invention relates to a treatment system for well-flushing wastewater, in particular to a mobile type well-flushing wastewater treatment system. Background technique [0002] The main purpose of flushing wells in oilfields is to maintain the water absorption of the formation. After the water injection well has been injected for a period of time, due to the accumulation of suspended solids and mechanical impurities in the water near the wellbore and the blast hole, the water absorption capacity of the formation may decrease or the water injection pressure may increase, and the water injection well may not be able to perform normal fishing tests. Serious Well adjustment operations are required. Well flushing of water injection wells can remove the accumulations in the wellbore, and reduce the pollution of oil layers near blastholes by micro-vomiting of oil layers. It is an effective and economical way for water injection wells to maintain the water a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/12
Inventor 吴巍回军杨飞飞
Owner CHINA PETROLEUM & CHEM CORP
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