Processing method for preparing polymer solution by oil production sewerage

A technology of polymer solution and oil production sewage, applied in the direction of heating water/sewage treatment, etc., can solve the problems of small processing capacity, high requirements, complex equipment maintenance, etc., and achieve the effect of less maintenance workload, long service life and mature technology

Inactive Publication Date: 2009-02-04
王美礼
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  • Abstract
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  • Application Information

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Problems solved by technology

The reverse osmosis method has problems such as relatively high requirements for influent water quality, high investment, and complicated equipment maintenance.
And the processing volume is small, not suitable for large-scale use

Method used

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  • Processing method for preparing polymer solution by oil production sewerage
  • Processing method for preparing polymer solution by oil production sewerage
  • Processing method for preparing polymer solution by oil production sewerage

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Embodiment Construction

[0015] combined with figure 1 , the present invention is further described, and the technical scheme is: the oil production sewage that reaches the oilfield sewage reinjection standard through the treatment of the sewage treatment station of the oilfield gathering and transportation system 1. (see figure 1 ) is pressurized to the pressure P1 (0.6-0.8MPa) by the water pump ②, and the temperature is further increased by the heat exchanger ⑤, and then the oil production sewage enters the evaporation equipment ④ from the steam trap ③, and the pressure is rapidly reduced to P2 (P1>10P2) P2 (0.06-0.08 MPa), the sewage will be quickly evaporated into steam, and the steam will be cooled by the condenser ⑥ to be purified water ⑦ (that is, the product water obtained through the treatment of the present invention), and the whole system is driven by a vacuum pump ⑨ to a negative pressure state. The unevaporated oil production sewage is lifted by the water pump ⑧ and enters the condenser...

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Abstract

The invention relates to a processing method of oil extraction wastewater used for preparing polymer solution. The technical proposal is as follows: the oil extraction wastewater is pressurized by a water pump until the pressure reaches 0.6 to 0.8MPa, the temperature is further increased by a heat exchanger, the pressure of the oil extraction wastewater that enters an evaporation device from a drain valve is reduced to 0.06 to 0.08MPa rapidly, the wastewater is rapidly evaporated into steam, purified water of the invention can be obtained after the steam is cooled by a condenser, and the whole system is driven to a negative pressure state by a vacuum pump; after being lifted by the water pump, the oil extraction wastewater that is not evaporated enters the condenser for heat exchange with the steam and then returns to a re-injection system of the oil extraction wastewater. Compared with a reverse osmosis (RO) method, the processing method of the invention has the advantages of simple process, mature technology, no need of pretreatment, long service life of the facility, little maintenance workload and high water quality (the salt content is less than 5mg/l), and the heat energy of self temperature (50 to 60 DEG C) of the oil extraction wastewater can cause the running cost to be equivalent to the reverse osmosis RO method by the application of low temperature evaporation technology.

Description

1. Technical field: [0001] The invention relates to a treatment method for oil production sewage to prepare polymer solutions. 2. Background technology: [0002] In oil extraction, a large amount of oil production sewage is produced, and the sewage is treated and reinjected into the underground oil layer to increase the energy of the oil layer to maintain or increase the crude oil production. In recent years, due to the application of tertiary oil recovery technology, the implementation of polymer injection flooding and other technologies has increased crude oil production, but also caused some sewage to remain on the ground, and a large amount of clean water is used to prepare polymer solutions. [0003] Compared with clean water, the initial viscosity of the polymer solution prepared by simply treated oil extraction wastewater is quite different, and the viscosity loss is large. It has a great influence on the effect of polymer flooding and cannot directly replace clean w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/04
Inventor 王美礼
Owner 王美礼
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