CN105366834B - The polymer-bearing waste-water processing system of offshore platform - Google Patents

The polymer-bearing waste-water processing system of offshore platform Download PDF

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Publication number
CN105366834B
CN105366834B CN201410431560.2A CN201410431560A CN105366834B CN 105366834 B CN105366834 B CN 105366834B CN 201410431560 A CN201410431560 A CN 201410431560A CN 105366834 B CN105366834 B CN 105366834B
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oil
dissolved gas
gas floatator
polymer
level oil
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CN201410431560.2A
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CN105366834A (en
Inventor
高鹏
邱里
李海庆
陈子婧
周晓红
窦培举
高磊
来远
徐海波
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China National Offshore Oil Corp CNOOC
CNOOC Research Institute Co Ltd
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China National Offshore Oil Corp CNOOC
CNOOC Research Institute Co Ltd
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Abstract

The invention discloses a kind of polymer-bearing waste-water processing system of offshore platform.It includes swash plate oil expeller, one-level oil removing dissolved gas floatator, two level oil removal dissolved gas floatator and double medium filters;The delivery port of the swash plate oil expeller is connected with the entrance of the one-level oil removing dissolved gas floatator, and oil-out is connected with slop tank;The outlet of the one-level oil removing dissolved gas floatator is connected with the entrance of the two level oil removal dissolved gas floatator;The outlet of the two level oil removal dissolved gas floatator is connected with double medium filters.The polymer-bearing waste-water processing system of offshore platform provided by the invention, the characteristics of being directed to offshore platform polymer-bearing waste-water can be effectively by the requirement of oil content about 1000~2000mg/L sewage disposals to 30mg/L, marine petroleum development can be effectively applied to, meet offshore platform installation, construction and the requirement of production maintenance.

Description

The polymer-bearing waste-water processing system of offshore platform
Technical field
The present invention relates to a kind of polymer-bearing waste-water processing system of offshore platform, belong to disposing polluted water in oil technical field.
Background technology
From after offshore oilfield polymer injection development, the polymer of injection is in oil bearing bed accumulation, migration, finally with Produced Liquid Output, is dissolved into undressed wet crude, greatly change the property of crude oil associated water, this property that changes Oil-polluted water is referred to as " polymer-bearing waste-water ".
Influence of the polymer-bearing waste-water for existing offshore production platform sewage disposal system is extremely huge.Because early stage produces Sewage disposal system design both for conventional sewage (non-containing poly-), can not be applied to polymer-bearing waste-water, cause processing sewage without Method is up to standard.
Therefore, it is necessary to develop a set of new handling process suitable for the processing of offshore platform polymer-bearing waste-water.
The general flow of conventional offshore platform oil-containing sewage treatment system is swash plate oil expeller+jet air float+walnut shell mistake Filter, typical process are as shown in Figure 1;By taking the flow shown in Fig. 1 as an example, oil-polluted water is larger by swash plate oil expeller place to go first Oil droplet, then smaller olesome is removed by gas flotation device, finally by tiny oil droplets and suspension in walnut shell filter sewage Composition granule, it is that oil-polluted water reaches outer row's standard or the standard of reinjection into reservoir.
Because polymer-bearing waste-water is compared with conventional sewage, have viscosity bigger, include that droplet diameter is smaller, and oil concentration is higher The features such as, therefore, the treatment effect of conventional waste water processes is very undesirable.
It is high for polymer-bearing waste-water viscosity, the characteristics of olesome is small, to reach the treatment effect same with conventional sewage, must Effective residence time must be increased.Polymer-bearing waste-water is pre-processed by swash plate oil expeller, afterwards will be more small, stabilization from bubble Air-dissolving air-float.Air-dissolving air-float uses two-stage, and the first order removes oil-containing in water removal, and suspension in water removal is removed in the second level, is handled for raising Effect, the internal increase swash plate of this two-stage air supporting choosing, " latent pond principle " is utilized to improve efficiency.Finally to ensure water quality, using upper strata For walnut shell filtering material (deoiling effect is good), lower floor is double medium filters of quartz sand filter media (oil removal effect is good).
The content of the invention
It is an object of the invention to provide a kind of polymer-bearing waste-water processing system of offshore platform, and it is empty that the present invention combines offshore platform Between limited, equipment gross weight it is limited the characteristics of, there is provided polymer-bearing waste-water can be handled to qualified processing system.
The polymer-bearing waste-water processing system of offshore platform provided by the present invention, including swash plate oil expeller, one-level remove oil soluble gas Air floatation machine, two level oil removal dissolved gas floatator and double medium filters;
The delivery port of the swash plate oil expeller is connected with the entrance of the one-level oil removing dissolved gas floatator, oil-out and dirt Oil tank is connected;The outlet of the one-level oil removing dissolved gas floatator is connected with the entrance of the two level oil removal dissolved gas floatator It is logical;The outlet of the two level oil removal dissolved gas floatator is connected with double medium filters.
In above-mentioned polymer-bearing waste-water processing system, the two level oil removal dissolved gas floatator and double medium filters Between be provided with production water surge tank.
In above-mentioned polymer-bearing waste-water processing system, the swash plate oil expeller receives oil content containing in 1000~2000mg/L Poly- sewage, and small oil droplet is polymerized to larger oil droplet by chemical agent, provide advantage for follow-up oil removing.
In above-mentioned polymer-bearing waste-water processing system, the one-level oil removing dissolved gas floatator and the molten gas of two level oil removal The outlet being connected with the slop tank is equipped with air floatation machine;
The one-level oil removing dissolved gas floatator provides stable continuous larger microbubble into polymer-bearing waste-water, goes to decontaminate Oil droplet in water;The two level oil removal dissolved gas floatator provides stable continuous less micro- gas into polymer-bearing waste-water Steep, impurity and a small amount of tiny oil droplets such as floccule body, suspension in removal sewage.
In above-mentioned polymer-bearing waste-water processing system, double medium filters can be (outstanding by the oil-containing and SS that produce in water Float) 30mg/L or so is all dropped to, with the influence for ensureing water stabilization and dealing with production procedure fluctuation;Stone may be selected in its filtrate Sand, anthracite, activated carbon, magnetic iron ore, any two in garnet, porous ceramics and baton round etc. are opened up, it is 0.5 such as to select particle diameter ~1.2mm walnut shell and particle diameter is 0.5~1.2mm quartz sand as filtrate.
In above-mentioned polymer-bearing waste-water processing system, the two level oil removal dissolved gas floatator is connected with the slop tank Pipeline be connected with a centrifugal dewatering of sludge machine.
In above-mentioned polymer-bearing waste-water processing system, the arrival end of the centrifugal dewatering of sludge machine connects a sludge surge tank.
The use process of the polymer-bearing waste-water processing system of offshore platform of the present invention is as follows:Oil-polluted water initially enters described oblique Dosing and coagulation are carried out in plate oil expeller, the oil droplet then gone by the one-level oil removing dissolved gas floatator in water removal, then by described Floccule body that two level oil removal dissolved gas floatator is gone in water removal, the impurity such as suspension, finally enter double medium filters Middle removal tiny oil droplets and suspension, and 30mg/L or so is arrived into water treatment.
The polymer-bearing waste-water processing system of offshore platform provided by the invention, the characteristics of being directed to offshore platform polymer-bearing waste-water, can Effectively by the requirement of oil content about 1000~2000mg/L sewage disposals to 30mg/L, can effectively be applied to offshore oil Exploitation, meet offshore platform installation, construction and the requirement of production maintenance.
Brief description of the drawings
Fig. 1 is the schematic diagram of conventional offshore platform oil-containing sewage treatment system.
Fig. 2 is the schematic diagram of the polymer-bearing waste-water processing system of offshore platform of the present invention.
Each mark is as follows in figure:
1 swash plate oil expeller, 2 one-level oil removing air-dissolving air-floats, 3 two level oil removal air-dissolving air-floats, 4 pairs of medium filters, 5 dirts Mud centrifugal dehydrator.
Embodiment
Experimental method used in following embodiments is conventional method unless otherwise specified.
Material used, reagent etc., unless otherwise specified, are commercially obtained in following embodiments.
As shown in Fig. 2 be the polymer-bearing waste-water processing system of offshore platform provided by the invention, it include swash plate oil expeller 1, One-level oil removing dissolved gas floatator 2, two level oil removal dissolved gas floatator 3, double medium filters 4 and centrifugal dewatering of sludge machine 5.Its In, swash plate oil expeller 1 plays a part of coagulation to the liquid that comes that oil content is 1000~2000mg/L or so, while adds oil removing Agent, small oil droplet is polymerized to larger oil droplet, advantage is provided for follow-up oil removing, its delivery port and one-level oil removing dissolved gas floatator 2 Entrance be connected, oil-out is connected with slop tank.One-level oil removing dissolved gas floatator 2 provides stable company into polymer-bearing waste-water Continuous larger microbubble, remove the oil droplet in sewage:The delivery port and two level oil removal of one-level oil removing dissolved gas floatator 2 are molten The entrance of gas air floatation machine 3 is connected, and oil-out is connected with slop tank.Two level oil removal dissolved gas floatator 3 is by more micro- Small uniform bubble, remove floccule body in sewage, impurity and a small amount of tiny oil droplets such as suspension, its delivery port and production Enter after the connection of water surge tank in double medium filters 4, its oil-out is connected with slop tank, also with one on the pipeline of the connection Centrifugal dewatering of sludge machine 5 is connected, and is provided with sludge surge tank between the two.Double medium filters 4 pass through walnut shell filtering material (0.5~1.2mm) and quartz sand filter media (0.5~1.2mm) can all drop to the oil-containing produced in water and SS (suspension) 30mg/L or so.

Claims (1)

  1. A kind of 1. polymer-bearing waste-water processing system of offshore platform, it is characterised in that:It includes swash plate oil expeller, one-level removes oil soluble gas Air floatation machine, two level oil removal dissolved gas floatator and double medium filters;
    The delivery port of the swash plate oil expeller is connected with the entrance of the one-level oil removing dissolved gas floatator, oil-out and slop tank It is connected;The outlet of the one-level oil removing dissolved gas floatator is connected with the entrance of the two level oil removal dissolved gas floatator; The outlet of the two level oil removal dissolved gas floatator is connected with double medium filters;
    It is equipped with the one-level oil removing dissolved gas floatator and the two level oil removal dissolved gas floatator and the slop tank phase The outlet of connection;
    Production water surge tank is provided between the two level oil removal dissolved gas floatator and double medium filters;
    The two level oil removal dissolved gas floatator is connected with the pipeline that the slop tank is connected with a centrifugal dewatering of sludge machine Connect;
    The arrival end of the centrifugal dewatering of sludge machine connects a sludge surge tank.
CN201410431560.2A 2014-08-28 2014-08-28 The polymer-bearing waste-water processing system of offshore platform Active CN105366834B (en)

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CN105366834B true CN105366834B (en) 2017-11-10

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106281435A (en) * 2016-09-29 2017-01-04 中国海洋石油总公司 A kind of offshore oilfield Produced Liquid processing system
CN110054329A (en) * 2019-04-16 2019-07-26 陕西睿兴华环境科技有限公司 A kind of small-sized central treating station or water-injection station produce sewage treatment skid method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202700166U (en) * 2012-06-14 2013-01-30 中国石油天然气集团公司 Polymer wastewater layering filter
CN103112977A (en) * 2013-02-26 2013-05-22 杭州广联新能源科技有限公司 Method for recycling injection polymers by polymer-containing sewage advanced treatment
CN203329433U (en) * 2013-05-27 2013-12-11 成都绿迪科技有限公司 Filter device for oil-field wastewater with high polymer content
CN204058124U (en) * 2014-08-28 2014-12-31 中国海洋石油总公司 A kind of polymer-bearing waste-water treatment system of offshore platform

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202700166U (en) * 2012-06-14 2013-01-30 中国石油天然气集团公司 Polymer wastewater layering filter
CN103112977A (en) * 2013-02-26 2013-05-22 杭州广联新能源科技有限公司 Method for recycling injection polymers by polymer-containing sewage advanced treatment
CN203329433U (en) * 2013-05-27 2013-12-11 成都绿迪科技有限公司 Filter device for oil-field wastewater with high polymer content
CN204058124U (en) * 2014-08-28 2014-12-31 中国海洋石油总公司 A kind of polymer-bearing waste-water treatment system of offshore platform

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Address after: 100010 Beijing, Chaoyangmen, North Street, No. 25, No.

Co-patentee after: CNOOC research institute limited liability company

Patentee after: China Offshore Oil Group Co., Ltd.

Address before: 100010 Beijing, Chaoyangmen, North Street, No. 25, No.

Co-patentee before: CNOOC Research Institute

Patentee before: China National Offshore Oil Corporation