CN103112967B - Oilfield sewage cyclone disturbance treatment method and device - Google Patents

Oilfield sewage cyclone disturbance treatment method and device Download PDF

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Publication number
CN103112967B
CN103112967B CN201310063388.5A CN201310063388A CN103112967B CN 103112967 B CN103112967 B CN 103112967B CN 201310063388 A CN201310063388 A CN 201310063388A CN 103112967 B CN103112967 B CN 103112967B
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China
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tank
sewage
pump
iron ion
storage tank
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Expired - Fee Related
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CN201310063388.5A
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CN103112967A (en
Inventor
赵尚柱
史福昌
杜洪
田爱民
程星萍
杜皎
鲁慧文
孟兵川
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Jilin dual environmental Polytron Technologies Inc
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孟兵川
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Abstract

The invention relates to an oilfield sewage cyclone disturbance treatment method and device. The device comprises a settling and impurity removing tank, a flocculation reaction tank, a scale settling tank, a stable iron ion reaction tank, agent storage tanks, four stages of booster pumps, agent dosing pumps and connecting pipelines. The oilfield sewage continuously passes through the four stages of purification tanks, is sprayed into the purification tanks in a cyclone state and is divided into sump oil, sewage and sludge under the effects of inertial centrifugal force and gravity. The treatment process is as follows: the oilfield sewage enters the settling and impurity removing tank to be separated, a flocculating agent is added to the separated sewage to carry out flocculation separation, an antiscaling agent is added to the separated sewage to remove scale cations, a stable iron ion agent is added to the separated sewage to remove iron ions and a corrosion and scale inhibitor is added to the separated sewage and then the separated sewage is sent to a water injection tank. The method and the device have the beneficial effects that through four stages of continuous cyclone disturbance treatment, the reaction is full and the separation effect is good; and the content of suspended matters in the treated sewage is not more than 3.0mg/L, the oil content is not more than 10.0mg/L and the iron content is not more than 0.5mg/L, so the treated sewage reaches the water quality standard of oilfield flooding.

Description

Oil field sullage rotational flow disturbance treatment method and device
technical field
The invention belongs to oily water treatment technical field.Relate to a kind of oil field sullage rotational flow disturbance treatment method and device.
Background technology
Oilfield sewage, compared with other trade effluent, contains the pollutents such as different solids, insoluble liquid and dissolved organic matter, inorganics, as silt, slag, oil slick, scaling cations (Ca 2+, Mg 2+deng) iron ion (--Fe 2+and Fe 3+), tensio-active agent etc.These pollutant emissions, to not only polluted surface water of nature, cause environmental degradation, return industrial and agricultural production around and people's life and bring harm.For eliminating above-mentioned hazard factor, must process oilfield sewage, make pollutent be reduced to the degree that environment can be accepted.
The Sewage treatment systems in prior art oil field is comparatively huge, and cost of sewage disposal is high, and sewage after treatment still contains a large amount of objectionable constituent, very easily pollutes stratum after re-injection, stops up stratum flow clearance, causes later stage water filling resistance to increase, even cannot water filling.The intractability that circulation gap is stopped up is large, processing costs costliness.
Summary of the invention
For overcoming the deficiencies in the prior art, the invention provides a kind of oil field sullage rotational flow disturbance treatment method, utilize the method for level Four purification pot eddy flow perturbation technique and interpolation medicament to remove oil slick, silt and objectionable impurities in oilfield sewage, improve disposing polluted water in oil effect.Another object of the present invention is to provide a kind of oil field sullage rotational flow disturbance treatment device of realizing aforesaid method.
Oil field sullage rotational flow disturbance treatment method of the present invention is: oilfield sewage sprays into purification pot with eddy flow state, under centrifugal inertial force and action of gravity, is divided into sump oil, sewage and mud three-phase.Oilfield sewage is through level Four purification pot eddy flow disturbance treatment, and treating processes is: oilfield sewage enters sedimentation decleaning tank and separates, and waste oil recovery is discharged mud.After the sewage pressurization separating, add flocculation agent to enter flocculation reaction tank and carry out flocculation separation, waste oil recovery, discharges mud.After the sewage pressurization separating, add scale remover to enter dirty slurry tank except de-sludging positively charged ion, discharge mud.After the sewage pressurization separating, add and stablize iron ion medicament and enter and stablize iron ion retort and remove iron ion, discharge mud, the sewage separating adds corrosion inhibiting and descaling agent to deliver to water injection tank after pressurizeing.
Scale remover is Na 2cO 3, flocculation agent is polyacrylamide or polymeric aluminum, and stablizing iron ion medicament is disodium EDTA, and inhibiter is chlorination dodecyl ammonium or Dodecylammonium acetate.
Oil field sullage rotational flow disturbance treatment device of the present invention, comprise water injection tank, slop oil tank and pollution discharge pond, device is provided with sedimentation decleaning tank, flocculation reaction tank, dirty slurry tank, stablizes iron ion retort, flocculation agent storage tank, scale remover storage tank, stablize iron ion medicament storage tank and corrosion inhibiting and descaling agent storage tank.Sedimentation decleaning tank, flocculation reaction tank, dirty slurry tank and stable iron ion retort are provided with sewage inlet, water out and sewage draining exit, and sewage draining exit is communicated with pollution discharge pond by pipeline.Sedimentation decleaning tank and flocculation reaction tank are provided with sump oil outlet, and sump oil outlet is connected to slop oil tank by receiving oil pump.Oilfield sewage pipeline is connected to the sewage inlet of sedimentation decleaning tank, and the water out of sedimentation decleaning tank is connected to the sewage inlet of flocculation reaction tank by one-level force (forcing) pump, and flocculation agent storage tank is connected to one-level pressurization pump outlet by flocculation agent dosing pump.The water outlet of flocculation reaction tank is connected to the sewage inlet of dirty slurry tank by two-stage pressurizing pump, scale remover storage tank is connected to two-stage pressurizing pump outlet by scale remover dosing pump.The water out of dirt slurry tank is connected to by three grades of force (forcing) pumps the sewage inlet of stablizing iron ion retort, stablizes iron ion medicament storage tank and is connected to three grades of pressurization pump outlet by stablizing iron ion dosing pump.Stablize iron ion retort and be connected to water injection tank by level Four force (forcing) pump, corrosion inhibiting and descaling agent storage tank is connected to level Four pressurization pump outlet by corrosion inhibiting and descaling agent dosing pump.
Sewage inlet is the structure that sewage tangential way enters purification pot.Sedimentation decleaning tank, flocculation reaction tank, dirty slurry tank, stablize iron ion retort, flocculation agent storage tank, scale remover storage tank, the material of stablizing iron ion medicament storage tank, corrosion inhibiting and descaling agent storage tank and each connecting pipeline is stainless steel, engineering plastics or glass reinforced plastic, engineering plastics are polyvinyl chloride, polyethylene or polypropylene.One-level force (forcing) pump, two-stage pressurizing pump, three grades of force (forcing) pumps, level Four force (forcing) pump, flocculation agent dosing pump, scale remover dosing pumps, stablize iron ion dosing pump and-corrosion inhibiting and descaling agent dosing pump is noncorrosive pump.
The present invention adopts the continuous eddy flow disturbance purification pot of level Four to separate under the effect of centrifugal force and gravity, and sufficient reacting, effectively removes oil slick in oilfield sewage, silt and objectionable impurities, has improved disposing polluted water in oil effect.Add flocculation agent, scale remover, stablize iron ion medicament and corrosion inhibiting and descaling agent, good separating effect, the object that realizes oil removing, the removal of impurity, descaling and antiscaling, deironing and increase water quality, water quality after treatment reaches suspension content≤3.0mg/L in sewage, oleaginousness≤10.0 mg/L, iron-holder≤0.5 mg/L has reached oil-field flooding water quality standard.Waste disposal plant flow process of the present invention is simple, easy to operate, is applicable to the purifying treatment of oilfield sewage, is also applicable to the processing of petroleum chemical enterprise's oily(waste)water.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of oil field sullage rotational flow disturbance treatment device of the present invention;
Fig. 2 is the schematic diagram of purification pot sewage inlet.
Wherein:
1-receipts oil pump, 2-sedimentation decleaning tank, 3-one-level force (forcing) pump, 4-flocculation agent storage tank, 5-flocculation agent dosing pump, 6-flocculation reaction tank, 7-two-stage pressurizing pump, 8-scale remover storage tank, 9-scale remover dosing pump, 10-dirty slurry tank, 11-three grades of force (forcing) pumps, 12-stablize iron ion medicament storage tank, 13-stablize iron ion dosing pump, 14-stablize iron ion retort, 15-level Four force (forcing) pump, 16-corrosion inhibiting and descaling agent storage tank, 17-corrosion inhibiting and descaling agent dosing pump, 18-wash water valve, 19-sewage inlet, 20-water out, the outlet of 21-sump oil, 22-sewage draining exit.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail.
Oil field sullage rotational flow disturbance treatment device of the present invention, as shown in Figure 1, comprise water injection tank, slop oil tank and pollution discharge pond, sedimentation decleaning tank 2, flocculation reaction tank 6, dirty slurry tank 10, stablize iron ion retort 14, flocculation agent storage tank 4, scale remover storage tank 8, stablize iron ion medicament storage tank 12 and corrosion inhibiting and descaling agent storage tank 16.Sedimentation decleaning tank, flocculation reaction tank, dirty slurry tank and stable iron ion retort are respectively equipped with sewage inlet 19, water out 20 and sewage draining exit 22.As shown in Figure 2, sewage inlet 19 is the structure (taking dirty slurry tank as example) that sewage tangential way enters purification pot, makes the sewage of ejection form eddy flow at purification pot.Sewage inlet is positioned at the middle part of each purification pot, and water out is positioned at the middle and upper part of each purification pot.Sewage draining exit is provided with wash water valve 18, and sewage draining exit is communicated with pollution discharge pond by pipeline.Sedimentation decleaning tank and flocculation reaction tank are respectively equipped with sump oil outlet 21, and sump oil outlet is positioned at the top of tank, and sump oil outlet is connected to slop oil tank by receiving oil pump 1.Oilfield sewage pipeline is connected to the sewage inlet of sedimentation decleaning tank, and the water out of sedimentation decleaning tank is connected to the sewage inlet of flocculation reaction tank by one-level force (forcing) pump 3, and flocculation agent storage tank 4 is connected to one-level pressurization pump outlet by flocculation agent dosing pump 5.The water outlet of flocculation reaction tank is connected to the sewage inlet of dirty slurry tank 10 by two-stage pressurizing pump 7, scale remover storage tank 8 is connected to two-stage pressurizing pump outlet by scale remover dosing pump 9.The water out of dirt slurry tank 10 is connected to by three grades of force (forcing) pumps 11 sewage inlet of stablizing iron ion retort 14, stablizes iron ion medicament storage tank 12 and is connected to three grades of pressurization pump outlet by stablizing iron ion dosing pump 13.Stablize iron ion retort and be connected to water injection tank by level Four force (forcing) pump 15, corrosion inhibiting and descaling agent storage tank 16 is connected to level Four pressurization pump outlet by corrosion inhibiting and descaling agent dosing pump 17.Sedimentation decleaning tank 2, flocculation reaction tank 6, dirty slurry tank 10, stablize iron ion retort 14, flocculation agent storage tank 4, scale remover storage tank 8, the material of stablizing iron ion medicament storage tank 12, corrosion inhibiting and descaling agent storage tank 16 and each connecting pipeline is polyvinyl chloride engineering plastics.Force (forcing) pumps at different levels and each dosing pump are noncorrosive pump.
The process of oil field sullage rotational flow disturbance treatment of the present invention is, oilfield sewage by the road with sewage inlet 19 with eddy flow state sedimentation decleaning tank 2, under centrifugal inertial force and action of gravity, be divided into sump oil, sewage and mud three-phase, the oil phase on top is through sump oil outlet 21, oil well pump 1 to slop oil tank, and the mud of bottom arrives pollution discharge pond through sewage draining exit 22, wash water valve 18 and connecting pipeline.The sewage that sedimentation decleaning tank 2 separates enters flocculation reaction tank 6 after the pressurization of one-level force (forcing) pump, carries out flocculation separation, and flocculation agent polyacrylamide adds one-level dosing pump outlet by flocculation agent dosing pump 5, and add-on is 2~2.5mg/L.The sepn process of flocculation reaction tank is identical with sedimentation decleaning tank, and waste oil recovery is discharged mud.The sewage that flocculation reaction tank separates enters dirty slurry tank 10 and removes Ca after 7 pressurizations of secondary dosing pump 2+, Mg 2+etc. dirty positively charged ion, scale remover Na 2cO 3join two-stage pressurizing pump outlet through scale remover dosing pump 9, add-on is 30mg/L.Dirt slurry tank 10 separates throw out and arrives discharge pond through sewage draining exit 22, after the sewage pressurization separating, enter and stablize iron ion retort 14 and remove iron ion, stablize iron ion medicament disodium EDTA and join three grades of pressurization pump outlet through stablizing iron ion dosing pump 13, add-on is 90mg/L.Stablize iron ion retort separate throw out through sewage draining exit 22 to discharge pond, the sewage separating is delivered to water injection tank after pressurizeing by level Four force (forcing) pump 15, corrosion inhibiting and descaling agent chlorination dodecyl ammonium joins level Four pressurization pump outlet by corrosion inhibiting and descaling agent dosing pump 17, and add-on is 90mg/L.

Claims (2)

1. an oil field sullage rotational flow disturbance treatment device, comprise water injection tank, slop oil tank and pollution discharge pond, it is characterized in that: described device is provided with sedimentation decleaning tank (2), flocculation reaction tank (6), dirty slurry tank (10), stablizes iron ion retort (14), flocculation agent storage tank (4), scale remover storage tank (8), stablize iron ion medicament storage tank (12) and corrosion inhibiting and descaling agent storage tank (16); Described sedimentation decleaning tank, flocculation reaction tank, dirty slurry tank and stable iron ion retort are provided with sewage inlet (19), water out (20) and sewage draining exit (22), and described sewage draining exit is communicated with pollution discharge pond by pipeline; Described sedimentation decleaning tank and flocculation reaction tank are provided with sump oil outlet (21), and described sump oil outlet is connected to slop oil tank by receiving oil pump (1); Oilfield sewage pipeline is connected to the sewage inlet of sedimentation decleaning tank, the water out of sedimentation decleaning tank is connected to the sewage inlet of flocculation reaction tank by one-level force (forcing) pump (3), described flocculation agent storage tank (4) is connected to one-level pressurization pump outlet by flocculation agent dosing pump (5); The water outlet of flocculation reaction tank is connected to the sewage inlet of dirty slurry tank (10) by two-stage pressurizing pump (7), described scale remover storage tank (8) is connected to two-stage pressurizing pump outlet by scale remover dosing pump (9); The water out of dirt slurry tank (10) is connected to by three grades of force (forcing) pumps (11) sewage inlet of stablizing iron ion retort (14), stablizes iron ion medicament storage tank (12) and is connected to three grades of pressurization pump outlet by stablizing iron ion dosing pump (13); Stablize iron ion retort and be connected to water injection tank by level Four force (forcing) pump (15), described corrosion inhibiting and descaling agent storage tank (16) is connected to level Four pressurization pump outlet by corrosion inhibiting and descaling agent dosing pump (17); The structure that described sewage inlet (19) enters purification pot for sewage tangential way; Described sedimentation decleaning tank (2), flocculation reaction tank (6), dirty slurry tank (10), stablize iron ion retort (14), flocculation agent storage tank (4), scale remover storage tank (8), the material of stablizing iron ion medicament storage tank (12), corrosion inhibiting and descaling agent storage tank (16) and each connecting pipeline is stainless steel, engineering plastics or glass reinforced plastic, described engineering plastics are polyvinyl chloride, polyethylene or polypropylene.
2. oil field sullage rotational flow disturbance treatment device according to claim 1, is characterized in that: described one-level force (forcing) pump (3), two-stage pressurizing pump (7), three grades of force (forcing) pumps (11), level Four force (forcing) pump (15), flocculation agent dosing pump (5), scale remover dosing pump (9), stablize iron ion dosing pump (13) and-corrosion inhibiting and descaling agent dosing pump (17) is noncorrosive pump.
CN201310063388.5A 2013-02-28 2013-02-28 Oilfield sewage cyclone disturbance treatment method and device Expired - Fee Related CN103112967B (en)

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
CN107352691A (en) * 2017-08-24 2017-11-17 安徽省鸿鑫生物科技有限公司 A kind of high calcium-containing oilfield sewage sofening treatment system and processing method

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Publication number Priority date Publication date Assignee Title
CN104370378B (en) * 2013-08-15 2016-05-11 中国石油天然气股份有限公司 A kind of method and apparatus of oilfield injection water fixed point deliming dirt
CN104773880B (en) * 2015-05-05 2017-01-25 南充西南石油大学设计研究院有限责任公司 Sewage treatment technology and equipment for well drilling
CN106621484A (en) * 2015-10-30 2017-05-10 新疆石油工程设计有限公司 Sedimentation oil removal tank, produced water treatment system and treatment method

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CN203095758U (en) * 2013-02-28 2013-07-31 孟兵川 Oilfield sewage rotational flow disturbance treatment device

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CN1944289A (en) * 2006-10-23 2007-04-11 中国石油大学(北京) Pre-treating process for sewage from thick oil refining
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