CN103936185B - A kind of super Heavy Oil High Temperature waste water treating and reutilizing is in the method for thermal recovery boiler - Google Patents
A kind of super Heavy Oil High Temperature waste water treating and reutilizing is in the method for thermal recovery boiler Download PDFInfo
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Abstract
The invention provides a kind of super Heavy Oil High Temperature waste water treating and reutilizing in the method for thermal recovery boiler, in super Heavy Oil High Temperature sewage, add reverse-phase emulsifier, remove the oil emulsion of high-load, then in Cyclonic reactor, add successively high-efficiency decontaminating agent, conditioning stabilizing agent and flocculating agent, oil removing and except solid suspension, carries out sedimentation, Separation of Solid and Liquid; Double-filtration is further removed tiny suspended solid; Super Heavy Oil High Temperature sewage enters the softening processing of two-stage ion-exchanger after being purified stable processing, reaches the thermal recovery boiler water quality standard of tap water. The temperature of the super Heavy Oil High Temperature sewage of this process makes full use, saves large energy, reduces the consumption of thermal recovery boiler fuel, realizes extremely-viscous crude sewage and recycles, and saves clear water resource, improves effects of energy saving and emission reduction and overall economic efficiency.
Description
Technical field
The present invention relates to the processing reuse of sewage, especially super Heavy Oil High Temperature waste water treating and reutilizing, the method sectionLearn rationally, result of use is splendid.
Background technology
To the class definition of extraction crude oil, 50 DEG C time below viscosity < 1000mPa.s is thin oil, 1000～Between 10000mPa.s is viscous crude, and 10000～50000mPa.s's is special viscous crude, more than 50000mPa.sFor super viscous crude. Super dense oil extraction wastewater is to contain solid impurity, microorganism, dissolved gas and solubility saltEtc. multi-component complex system, ubiquity organism kinds is assorted, salinity is high, oil content is high, become dirt fromThe feature that sub-content is high. The feature of extremely-viscous crude sewage is " the high oil-containing high suspended matter of high temperature high-silicon type recovered water ",Difficult point aspect purified treatment: it is high that (1) deviates from sewage temperature, reaches 80～90 DEG C; (2) containing height containsMeasure colloid and asphalitine and carry the suspensions such as a large amount of silt; (3) conventional water purification agent at 80-90 DEG C because of pointSubchain fracture or because of oil, suspension molecular motion violent and ineffective. (4) inorganic water purification agent heat resistanceAlthough better, super dense oil extraction wastewater suspension content is too high, in inorganic water purification agent and water, suspension produces largeThereby amount flco reduces the solid-liquid separative efficiency of equipment, and therefore result of use is poor. (5) at Produced Liquid by liftingIn ground and dehydration, added a large amount of chemical agents, these medicaments remain among recovered water, makeSewage has formed stable emulsion. This sewage not only oil content is high, and super viscosity of thickened oil is large in addition, makes dirtWater purification is more complicated, and intractability is larger. The difficult point of super dense oil extraction wastewater aspect advanced treating: superWhat condensed oil sewage advanced treating technology adopted is ion exchange technique, the hardness in water can be processed to 0.1mg/L(with CaCO3Meter) below, although reached the index request of injection boiler to hardness, super viscous crude extractionSiO in water2Mass concentration is at 200mg/L even more than 250mg/L, residual hardness and multivalence in waterMetal cation at high temperature with water in the silicon of the different shape formation silicate scale that reacts, if this sewage is usedIn steam occurs, will in thermal recovery boiler or steam injection pipeline, form silicon dirt, its harmfulness is far away higher than calcium dirt.In the water quality index of current reusing sewage injection boiler after treatment, require SiO2Mass concentration 100mg/L withUnder. Adopt lime or causticity tenderizer to process the SiO in super Heavy Oil High Temperature sewage2All undesirable, because:1. softening medicament dosage is large, produces a large amount of mud, has increased difficulty to sludge treatment. 2. operating parameterComplexity, medicament softening process, because multiple parameters may change, causes controlling difficulty large. 3. technological processLong, equipment increases. Medicine soften need to increase the process facility such as softening pond, silica removal pond, depositing reservoir, needsIncrease various medicaments adding equipment. 4. investment and processing cost are high.
Method provided by the invention, separates excess of export Heavy Oil High Temperature sewage to oil well and carries out advanced treating, its techniqueBe the temperature that makes full use of super Heavy Oil High Temperature sewage, save thermal recovery boiler fuel consumption, implement the collection of multi-stepBecome to dispose, realize the utilization of super Heavy Oil High Temperature effluent cycle, saved clear water resource, protection of the environment, has aobviousThe economic benefit of work and good social benefit.
Summary of the invention
The object of the invention is to: for super Heavy Oil High Temperature waste water treating and reutilizing method, efficiently solve existingTechnology production problem, has reached the effect to super Heavy Oil High Temperature sewage disposal, for industry energy conservation consumption reduction has been madeDemonstration.
The object of the present invention is achieved like this: a kind of super Heavy Oil High Temperature waste water treating and reutilizing is in thermal recovery boilerMethod, implements step by step;
Step 1 adds reverse-phase emulsifier to the super Heavy Oil High Temperature sewage that is placed in knockout drum, implements water-oil separating,Dosage is 20-50mg/L;
Wherein reverse-phase emulsifier is made up of cation polyether quaternary ammonium salt, 3.0G polyamide-amide, nonionic polyoxyalkylene;Two kinds are mixed use mixing ratio is 1:1-2:1, and three kinds are mixed use mixing ratios is 1:2:1, and water after treatment containsOil mass is less than 5mg/L, suspended solids content is less than 10mg/L;
Step 1 water outlet is placed in Cyclonic reactor by step 2, add successively cleanser, conditioning stabilizing agent,Flocculating agent, wherein cleanser dosage is 100-200mg/L, conditioning stabilizing agent dosage is 50-100mg/L, solidifyingPoly-agent dosage is 6-10mg/L;
Wherein cleanser is made up of aluminium polychloride, polyaluminium sulfate, polysilicic acid aluminum chloride, and two kinds of mixing makeWith mixing ratio be 1:1-2:1, three kinds mix use mixing ratios be 1:1:1;
Wherein nurse one's health stabilizing agent and be made up of polyphosphate, organophosphorus ester, NaOH, two kinds of mixing makeWith mixing ratio be 1:20-1:25, three kinds mix use mixing ratios be 1:1:20-1:1:25;
Wherein flocculating agent is made up of PAMA, non-ionic polyacrylamide, and two kinds are mixed use and mixComposition and division in a proportion is 2:1-3:1; Anion and non-ionic molecular weight ranges are 1,500 ten thousand-2,000 ten thousand;
Step 2 water outlet is placed in the sedimentation of inclined plate sedimentation tank by step 3, after buffering, pumps into one-level double filtering and filterDevice and secondary fine filter, remove remaining oil and suspension in water, and making its water outlet oil content is 0mg/L, outstandingFloating solids content is less than 2mg/L; Enter again in one-level sodium type cation exchange demineralizer and process, make total hardness≤0.1mg/L; Enter in secondary chelating ion exchange resin demineralizer and process, make calcium ion, magnesium ion, ironIon concentration all≤0.02mg/L, can enter thermal recovery boiler reuse.
Described method, super viscosity of thickened oil in the high temperature sewage of disposal > 50000Mpa.s, sewage temperature 85-90 DEG C,PH7.5-8.5, salinity 2000-4000mg/L, oil content 10000-20000mg/L, suspended solid containsAmount 500-1000mg/L, hardness 40-80mg/L, dioxide-containing silica 200-250mg/L.
The mechanism of action of the present invention and usefulness: adopt the water quality of the method processing, reach China National PetroleumThermal recovery boiler is to water quality standard--and oilfield sewage reuse wet steam generator water standard (Q/sy1275-2010) is wantedAsk. This process using there is energy-saving and cost-reducing gravity-cyclone reaction-filtering process, and shock resistance is stableWater quality and water-quantity regulating device, demineralized water is processed and is used chelating ion exchange resin melded system, withoutSilica removal processing, has replaced complicated operation, sludge quantity is large, disposal cost is high chemical agent melded system, makesOperate more simple and conveniently, multi-purpose station daily means is processed the water yield 4.0 × 104m3Calculate, saving heat energy is (thickOily water temperature, fuel oil) blowdown reclaims crude oil clear water resource etc. and adds up to 1139 × 105Unit/year, show technologyProgressive.
Brief description of the drawings
Below in conjunction with accompanying drawing, the invention is further described.
Accompanying drawing is super Heavy Oil High Temperature sewage treatment process figure;
As shown in the figure: the tank → filtration of sewage → regulating tank → reaction surge tank → Cyclonic reactor → inclined plate sedimentationSurge tank → Double-filter material filter → fine filter → sodium type cation exchange demineralizer → chelating type ion is handed overChange resin demineralizer → thermal recovery boiler.
Detailed description of the invention
Below in conjunction with embodiment, invention is further illustrated.
Embodiment 1
The super Heavy Oil High Temperature sewage in certain oil field, 90 DEG C of sewage temperatures, pH8.5, salinity 4000mg/L, containsOil mass 20000mg/L, suspended solids content 1000mg/L, hardness 80mg/L, dioxide-containing silica 250mg/L;
Treatment step:
1) in super Heavy Oil High Temperature sewage, add 50mg/L reverse-phase emulsifier, reverse-phase emulsifier is that cation is poly-Ether quaternary ammonium salt, 3.0G polyamide-amide mixture, its mixing ratio is 1:1, adopts measuring pump, wet method adds;
2) add high-efficiency decontaminating agent 200mg/L to step 1) water, in special Cyclonic reactor, carry out anti-Should, reaction time 45s, high-efficiency decontaminating agent is the mixture of aluminium polychloride, polyaluminium sulfate, its mixing ratioFor 2:1, adopt measuring pump, wet method adds;
3) to step 2) water adds conditioning stabilizing agent 100mg/L, in special Cyclonic reactor, reacts,Reaction time 47s, conditioning stabilizing agent is polyphosphate, organophosphorus ester and NaOH mixture; It is mixedComposition and division in a proportion is 1:1:20, adopts measuring pump, and wet method adds;
4) add flocculating agent 10mg/L to step 3) water, in special Cyclonic reactor, react, anti-60s between seasonable, flocculating agent is the mixture of PAMA, non-ionic polyacrylamide, its mixingThan being 2:1, molecular weight ranges is 1,500 ten thousand; Adopt measuring pump, wet method adds;
5) by step 4) treated water, enter the sedimentation of inclined plate sedimentation tank, then in filtration surge tank, enterRow buffering, pumps in one-level Double-filter material filter and secondary fine filter by elevator pump, carries out two-stage mistakeFilter, removes remaining oil and suspension in water, and making its water outlet oil content is that 0mg/L, suspended solids content are less than2mg/L; Enter one-level sodium type cation exchange demineralizer, make total hardness≤0.1mg/L; Enter secondary chelatingIn type ion exchange resin demineralizer, make calcium ion, magnesium ion, iron ion content all≤0.02mg/L; EnterEnter thermal recovery boiler reuse.
Embodiment 2
The super Heavy Oil High Temperature sewage in certain oil field, sewage temperature is 85 DEG C, and pH is 7.5, and salinity is 2000mg/L,Oil content is 10000mg/L, and suspended solids content is 500mg/L, and hardness is 40mg/L, and silica containsAmount is 200mg/L;
Treatment step:
1) in super Heavy Oil High Temperature sewage, add 20mg/L reverse-phase emulsifier; Reverse-phase emulsifier is 3.0G polyamidesAmine-amine, nonionic polyoxyalkylene mixture, its mixing ratio is 2:1, adopts measuring pump, wet method adds;
2) add high-efficiency decontaminating agent 100mg/L to step 1) water, in special Cyclonic reactor, carry out anti-Should, reaction time 45s, high-efficiency decontaminating agent is the mixture in polyaluminium sulfate, poly-silicon aluminium chloride; Its mixingThan being 1:1, adopt measuring pump, wet method adds;
3) to step 2) water adds conditioning stabilizing agent 50mg/L, in special Cyclonic reactor, reacts,Reaction time 60s, conditioning stabilizing agent is organophosphorus ester, magnesium chloride mixture; Its mixing ratio is 1:20,Adopt measuring pump, wet method adds;
4) add flocculating agent 6mg/L to step 3) water, in special Cyclonic reactor, react, anti-48s between seasonable, flocculating agent is the mixture of PAMA, non-ionic polyacrylamide, its mixingThan being 3:1, molecular weight ranges is 2,000 ten thousand; Adopt measuring pump, wet method adds;
5) by step 4) treated water, to step 4 treated water, enter the sedimentation of inclined plate sedimentation tank,Then cushion filtering in surge tank, by elevator pump pump into one-level Double-filter material filter and secondary meticulousIn filter, carry out double-filtration, remove remaining oil and suspension in water, make its water outlet oil content be 0mg/L,Suspended solids content is less than 2mg/L; Enter one-level sodium type cation exchange demineralizer, make total hardness≤0.1mg/L; Enter in secondary chelating ion exchange resin demineralizer, make calcium ion, magnesium ion, iron ionContent all≤0.02mg/L; Enter thermal recovery boiler reuse.
Embodiment 3
The super Heavy Oil High Temperature sewage in certain oil field, sewage temperature is 90 DEG C, and pH is 8.0, and salinity is 3000mg/L,Oil content is 15000mg/L, and suspended solids content is 800mg/L, and hardness is 60mg/L, and silica containsAmount is 220mg/L;
Treatment step:
1) in super Heavy Oil High Temperature sewage, add 30mg/L reverse-phase emulsifier; Reverse-phase emulsifier is that cation is poly-Ether quaternary ammonium salt, 3.0G polyamide-amide, nonionic polyoxyalkylene mixture, its mixing ratio is 1:2:1, adopts meteringPump, wet method adds;
2) add high-efficiency decontaminating agent 150mg/L to step 1) water, in special Cyclonic reactor, carry out anti-Should, reaction time 48s, high-efficiency decontaminating agent is to mix in aluminium polychloride, polyaluminium sulfate, poly-silicon aluminium chlorideThing; Its mixing ratio is 1:1:1, adopts measuring pump, and wet method adds;
3) to step 2) water adds conditioning stabilizing agent 80mg/L, in special Cyclonic reactor, reacts,Reaction time 49s, conditioning stabilizing agent is the mixture of polyphosphate, organophosphorus ester, calcium hydroxide; ItsMixing ratio is 1:1:25, adopts measuring pump, and wet method adds;
4) add flocculating agent 8mg/L to step 3) water, in special Cyclonic reactor, react, anti-60s between seasonable, flocculating agent is the mixture of PAMA, non-ionic polyacrylamide, its mixingThan being 3:1, molecular weight ranges is 1,800 ten thousand; Adopt measuring pump, wet method adds;
5) by step 4) treated water, enter the sedimentation of inclined plate sedimentation tank, then in filtration surge tank, enterRow buffering, pumps in one-level Double-filter material filter and secondary fine filter by elevator pump, carries out two-stage mistakeFilter, removes remaining oil and suspension in water, and making its water outlet oil content is that 0mg/L, suspended solids content are less than2mg/L; Enter one-level sodium type cation exchange demineralizer, make total hardness≤0.1mg/L; Enter secondary chelatingIn type ion exchange resin demineralizer, make calcium ion, magnesium ion, iron ion content all≤0.02mg/L; EnterEnter thermal recovery boiler reuse.
Adopt said method to process purifying waste water of obtaining, after measured, in water, oil content is 0mg/L, suspension≤ 2mg/L, calcium ion, magnesium ion, iron ion content all≤0.02mg/L, without carrying out silica removal processing,Reach answering that in oilfield sewage reuse wet steam generator water standard (Q/sy1275-2010), regulation feeds waterStandard up to standard.
Three, production effect checking:
Purifying waste water that said method processing is obtained measured water quality index in table 1, table 2.
Table 1 surpasses Heavy Oil High Temperature sewage disposal
Table 2 surpasses Heavy Oil High Temperature sewage disposal
Learnt by table 1, table 2 data: in water after treatment, oil content is 0mg/L, suspension≤2mg/L,Calcium ion, magnesium ion, iron ion content all≤0.02mg/L, without carrying out silica removal processing, reach oil field dirtThe regulation standard that should reach that feeds water in water reuse wet steam generator water standard (Q/sy1275-2010).
One-level Double-filter material filter, secondary fine filter, one-level sodium type cation exchange that the present invention selectsThe manufacturer of demineralizer, secondary chelating ion exchange resin demineralizer is Oilfield Company.
Cation polyether quaternary ammonium salt, 3.0G polyamide-amide, nonionic polyoxyalkylene, polymerization chlorination that the present invention selectsAluminium, polyaluminium sulfate, poly-silicon aluminium chloride, polyphosphate, organophosphorus ester anion, polyacrylamide,The manufacturer of non-ionic polyacrylamide is that Karamay, Xinjiang three reaches chemical company of Co., Ltd.
Claims (1)
1. a super Heavy Oil High Temperature waste water treating and reutilizing is in the method for thermal recovery boiler, super viscosity of thickened oil in described high temperature sewage > 50000Mpa.s, sewage temperature 85-90 DEG C, pH7.5-8.5, salinity 2000-4000mg/L, oil content 10000-20000mg/L, suspended solids content 500-1000mg/L, hardness 40-80mg/L, dioxide-containing silica 200-250mg/L, is characterized in that: the method is implemented step by step:
Step 1, add reverse-phase emulsifier to the super Heavy Oil High Temperature sewage that is placed in knockout drum, implement water-oil separating, dosage is 20-50mg/L; Described reverse-phase emulsifier is made up of cation polyether quaternary ammonium salt, 3.0G polyamide-amide, nonionic polyoxyalkylene; Three kinds are mixed use mixing ratio is 1:2:1, and water oil content after treatment is less than 5mg/L, suspended solids content is less than 10mg/L;
Step 2, step 1 water outlet is placed in to Cyclonic reactor, adds successively cleanser, conditioning stabilizing agent, flocculating agent, wherein cleanser dosage is 100-200mg/L, and conditioning stabilizing agent dosage is 50-100mg/L, and flocculating agent dosage is 6-10mg/L;
Described cleanser is made up of aluminium polychloride, polyaluminium sulfate, polysilicic acid aluminum chloride, and three kinds are mixed use mixing ratio is 1:1:1; Described conditioning stabilizing agent is made up of polyphosphate, organophosphorus ester, NaOH, and three kinds are mixed use mixing ratio is 1:1:20 or 1:1:25; Described flocculating agent is made up of PAMA, non-ionic polyacrylamide, and two kinds are mixed use mixing ratio is 2:1-3:1; Anion and non-ionic molecular weight ranges are 1,500 ten thousand-2,000 ten thousand;
Step 3, step 2 water outlet is placed in to the sedimentation of inclined plate sedimentation tank, after buffering, pumps into one-level Double-filter material filter and secondary fine filter, remove remaining oil and suspension in water, making its water outlet oil content is 0mg/L, and suspended solids content is less than 2mg/L; Enter again in one-level sodium type cation exchange demineralizer and process, make total hardness≤0.1mg/L; Enter in secondary chelating ion exchange resin demineralizer and process, make calcium ion, magnesium ion, iron ion content all≤0.02mg/L, can enter thermal recovery boiler reuse.
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| CN105152288A (en) * | 2015-07-09 | 2015-12-16 | 中国石油天然气股份有限公司 | Method for recycling steam-injection separated water of SAGD (steam assisted gravity drainage) |
| CN106007096A (en) * | 2016-07-15 | 2016-10-12 | 嘉兴通惠环保科技有限公司 | Pretreatment technology for textile machine cleaning high-oil-content waste liquor |
| CN107795299B (en) * | 2016-08-30 | 2019-07-26 | 中国石油化工股份有限公司 | A kind of method that grease well acidizing returns drain recycling reuse |
| CN107162154B (en) * | 2017-06-12 | 2020-04-14 | 中国矿业大学 | Ternary combination flooding produced water load type reverse demulsifier and preparation method thereof |
| CN109628140B (en) * | 2018-12-29 | 2021-08-10 | 中海油天津化工研究设计院有限公司 | Preparation method of reversed phase demulsification water purifier for treating heavy oil containing oily sewage |
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| CN103086472A (en) * | 2012-12-31 | 2013-05-08 | 克拉玛依市三达新技术开发有限责任公司 | High-temperature sewage treatment reverse demulsifier of ultra-heavy oil |
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