Optimization design device and optimization method for filtration-backwash parameters of polymer-containing sewage

Abstract

The present invention relates to a filter-backwash parameter optimization design device and optimization method for poly-contained sewage, wherein the forward filter pipeline of the poly-contained sewage filter-backwash parameter optimization design device is connected from the raw water chamber of the vertical sewage tank to the downward flow The forward filter sewage pipeline is set between the water distributors on the top of the filter tank, and the purified water pipeline is set between the water collecting chamber of the downward flow filter tank and the purified water buffer room of the vertical sewage tank, and the forward filter sewage pipeline is formed. Set forward filter incoming water valve, centrifugal pump, water flow adjustment valve, flow sensor, inlet pressure sensor; the backwash incoming water valve of the backwash pipeline is also connected to the centrifugal pump through the pipeline; the purified water pipeline is provided with an outlet pressure sensor, The cylinder opening and closing system, flow sensor, inlet pressure sensor, outlet pressure sensor and centrifugal pump are all connected to the automatic control cabinet. The invention can reduce the number of optimized sequences, and can effectively improve the refinement of filtering-backwashing parameter optimization design results.

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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