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Immersed membrane biological integrated reactor for up-to-standard reinjection of oilfield produced water into ultra-low permeable layer and application of immersed membrane biological integrated reactor

An immersed membrane and produced water technology, which is applied in mining wastewater treatment, aerobic and anaerobic process treatment, etc., can solve the problems of substandard treated water quality and low degradation efficiency of organic matter, and can prolong the chemical cleaning cycle and operation time. Simple structure, prolonging the effect of chemical cleaning cycle

Active Publication Date: 2022-07-29
DAQING OILFIELD ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of low organic matter degradation efficiency and substandard treatment water quality in existing devices for reinjection of produced water in ultra-low permeability layers, and to provide a immersion system for reinjection of ultra-low permeability layers in which produced water reaches standards in oilfields. Membrane biointegrated reactor and its application

Method used

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  • Immersed membrane biological integrated reactor for up-to-standard reinjection of oilfield produced water into ultra-low permeable layer and application of immersed membrane biological integrated reactor
  • Immersed membrane biological integrated reactor for up-to-standard reinjection of oilfield produced water into ultra-low permeable layer and application of immersed membrane biological integrated reactor
  • Immersed membrane biological integrated reactor for up-to-standard reinjection of oilfield produced water into ultra-low permeable layer and application of immersed membrane biological integrated reactor

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specific Embodiment approach 1

[0027] Embodiment 1: In this embodiment, a submerged membrane bio-integrated reactor used for oilfield produced water to meet the standard and reinjection into an ultra-low permeability layer, includes a box body, and the inside of the box body is divided into multiple parts by baffles along the water flow direction The reaction chamber, the multiple reaction chambers are the first anaerobic chamber 4, the second anaerobic chamber 5, the third anaerobic chamber 6, the anoxic chamber 7, the first aerobic chamber 8, and the second aerobic chamber 9. , a water inlet is provided on the upper part of the side of the box close to the first anaerobic chamber 4, the anoxic chamber 7 and the bottom of the first aerobic chamber 8 are provided with a return port, and the first aerobic chamber 8 and the second aerobic chamber are provided with a return port. The bottom of 9 is provided with an air inlet; the bottom of all reaction chambers is provided with a mud phase outlet connected with...

specific Embodiment approach 2

[0031] Embodiment 2: This embodiment differs from Embodiment 1 in that: the first solid-liquid separation system G1 and the second solid-liquid separation system G2 have the same structure; the first solid-liquid separation system G1 and the second solid-liquid separation system G1 The structure of the liquid separation system G2 is composed of two layers of angle steel that are staggered up and down evenly. There are gaps between the two adjacent angle steels, and the gap flow rate is less than or equal to 2m / h; °, and both ends are connected to the inner wall of the submerged membrane reaction chamber 10 . Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0032] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the second fan 3 arranged outside the box is connected to the aeration pipes at the bottom of the first aerobic chamber 8 and the second aerobic chamber 9 Pass. Other steps are the same as in the first or second embodiment.

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Abstract

The invention relates to an immersed membrane biological integrated reactor and application, in particular to an immersed membrane biological integrated reactor for standard reinjection of oilfield produced water into an ultra-low permeable layer and application. The invention aims to solve the problems that the organic matter degradation efficiency is low and the treated water quality does not reach the standard when the existing device is used for treating the reinjection ultra-low permeable layer produced water. An immersed membrane biological integrated reactor for an ultra-low permeable layer for standard reinjection of oilfield produced water comprises a box body, and the interior of the box body is divided into a plurality of reaction chambers by baffle plates along the water flow direction; the plurality of reaction chambers comprise a first anaerobic chamber, a second anaerobic chamber, a third anaerobic chamber, an anoxic chamber, a first aerobic chamber, a second aerobic chamber and an immersed membrane reaction chamber which are sequentially connected in series. The invention relates to a submerged membrane biological integrated reactor for reinjecting oilfield produced water to an ultra-low permeable layer after reaching the standard, which is used for treating the produced water of the ultra-low permeable layer after being reinjected. According to the invention, the immersed membrane biological integrated reactor for reinjection of oilfield produced water to the ultra-low permeable layer after reaching the standard can be obtained.

Description

technical field [0001] The invention relates to a submerged membrane biological integrated reactor and its application. Background technique [0002] Due to its low permeability (average air permeability ≤ 0.01μm) 2 ), the radius of the pore throat is small, and clogging is easy to occur during the water injection process, so the requirements for the water injection quality are extremely strict. According to "Recommended Indicators of Water Injection Water Quality for Clastic Rock Reservoirs" SY / T 5329-2012, the effective development of ultra-low permeability layers must be guaranteed by the water quality of "5.1.1", that is, the oily sewage must meet the oil content ≤5mg / L. The content of suspended solids is ≤1mg / L, and the median particle size of suspended solids is ≤1μm. [0003] At present, the oily sewage treatment process at home and abroad requires the water quality after treatment to meet the "5.1.1" index (oil content ≤ 5mg / L, suspended solid content ≤ 1mg / L, med...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30C02F103/10
CPCC02F3/301C02F2201/002C02F2209/005C02F2303/14C02F2203/006C02F2103/10C02F2305/06Y02W10/10
Inventor 赵秋实陈春茂陈忠喜郭绪强张岳单红曼舒志明
Owner DAQING OILFIELD ENG
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