Optimization design device and optimization method for filtering-backwashing parameters of poly-containing sewage

Abstract

The invention relates to an optimization design device and an optimization method for filtering-backwashing parameters of poly-containing sewage. A positive filtering pipeline in the optimization design device for the filtering-backwashing parameters of the poly-containing sewage consists of a positively-filtered sewage pipeline and a purified water pipeline, wherein the positively-filtered sewage pipeline is arranged between a raw water chamber of a vertical sewage tank and a water distributor at the top of a downstream flow filter tank; the purified water pipeline is arranged between a water collecting chamber of the downstream flow filter tank and a purified water buffer chamber of the vertical sewage tank; a positively-filtered incoming water valve, a centrifugal pump, a water flow regulating valve, a flow sensor and an inlet pressure sensor are arranged on the positively-filtered sewage pipeline; a backwashing incoming water valve of a backwashing pipeline is also connected with the centrifugal pump through a pipeline; an outlet pressure sensor is arranged on the purified water pipeline; a cylinder opening and closing system, the flow sensor, the inlet pressure sensor, the outlet pressure sensor and the centrifugal pump are all connected with an automatic control cabinet. According to the optimization design device and the optimization method provided by the invention, the quantity of optimizing sequences can be reduced, and the precision of optimization design results of the filtering-backwashing parameters can also be effectively improved.

Description

technical field [0001] The invention relates to an advanced treatment technology for polymer-containing produced water based on multi-media gradation filtration in the surface matching process of polymer flooding oilfields, and specifically relates to an optimization design device and optimization method for polymer-containing sewage filtration-backwashing parameters. Background technique [0002] As the most common tertiary oil recovery technology, polymer flooding has been widely used in most large oil fields around the world, because the main technical feature of this flooding method is to add water-soluble polymers to the injected water to increase the displacement of the displacement phase. Therefore, when the oil well is affected to different degrees during the advancement of the polymer front, there will be different amounts of polymer residues in the corresponding produced water. This type of produced water is called "polymer-containing sewage". Based on years of dev...

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Problems solved by technology

The current "two-stage filtration" advanced sewage treatment process and its operating parameter limits in oilfields are constructed and designed for water flooding produced water. The flushing operation parameters will directly affect the water quality treatment index, the anti-pollution ability of the filter equipment (such as the occurrence of filter material compaction) and its operation stability (such as the increase of the backwash pressure and the doubling of the backwash water volume). For the advanced treatment effect of sewage, following the primary homogeneous filter material filtration, it has become a trend to adopt multi-media gradation filtration in the secondary filtration (Zhao Hui (Zhao Hui), Ji Ran (Ji Ran), Environmental Protection of Chemical Industry (Chemical Environmental Protection), 2009, 29 (6): 526~529; China National Petroleum Corporation (China National Petroleum Corporation), Code for Design of Oil Field Produced Water Treatment (Design Specifications for Oilfield Produced Water Treatment), 2007), but based on this filtration mode for advanced treatment of polymer-containing wastewater, there is still a lack of scientific optimization of filtration-backwash parameters considering the change in water quality characteristics of polymer-containing wastewater itself during oilfield development Designed devices and methods, and there is no relevant report specifically for this

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