CN106256780A - A kind of reinjection treatment method up to standard of the wastewater with high concentration of sulfide of oil gas field - Google Patents

A kind of reinjection treatment method up to standard of the wastewater with high concentration of sulfide of oil gas field Download PDF

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CN106256780A
CN106256780A CN201510340481.5A CN201510340481A CN106256780A CN 106256780 A CN106256780 A CN 106256780A CN 201510340481 A CN201510340481 A CN 201510340481A CN 106256780 A CN106256780 A CN 106256780A
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sulfide
wastewater
oil gas
high concentration
gas field
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张新妙
郦和生
平春霞
彭海珠
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Sinopec Beijing Research Institute of Chemical Industry
China Petroleum and Chemical Corp
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Sinopec Beijing Research Institute of Chemical Industry
China Petroleum and Chemical Corp
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Abstract

The present invention relates to the reinjection treatment method up to standard of the wastewater with high concentration of sulfide of a kind of oil gas field, first, use negative pressure desulfurization technology by the most of hydrogen sulfide stripping out centralized burning in waste water;Secondly, use chemical catalytic oxidation technology by the remaining Oxidation of Hydrogen Sulfide in negative pressure desulfurization water outlet;Afterwards, catalytic oxidation desulfurization water outlet carries out flocculating sedimentation;Finally, flocculating sedimentation water outlet enters organic membrane filter unit and carries out organic membrane filter, and water outlet sulfur content, suspension content and oil content meet oil gas field reinjected water standard.The reinjection treatment method up to standard of the wastewater with high concentration of sulfide of oil gas field of the present invention, use negative pressure desulfurization+chemical catalytic oxidation+flocculating sedimentation+organic membrane filter technology, can effectively remove the sulfide in waste water, solve the problem that sulfur content is too high in oil gas field wastewater with high concentration of sulfide re-injection process, solve that existing treatment technology equipment is huge, complex process, inefficient, environmental suitability is poor, operating cost is high, is difficult to the shortcomings such as maintenance.

Description

A kind of reinjection treatment method up to standard of the wastewater with high concentration of sulfide of oil gas field
Technical field
The present invention relates to field of industrial waste water treatment, the high sulfur-bearing of a kind of oil gas field gives up The reinjection treatment method up to standard of water.Espespecially utilize negative pressure desulfurization+chemical catalytic oxidation+flocculating sedimentation The reinjection treatment method up to standard of the wastewater with high concentration of sulfide of+organic membrane filter technical finesse oil gas field.
Background technology
Along with improving constantly, to demand for energy day of socio-economic development and living standards of the people Big increasingly, exploitation of oil-gas field amount increases year by year.In the exploitation of oil gas field, particularly in gas field The middle and late stage of exploitation, owing to formation water can invade gas reservoir along tomography and structural fracture, enters shaft bottom, Making gas reservoir energy loss increase, well head pressure reduces, and band outlet capacity is deteriorated, and causes the gas well underproduction Or water logging stops production, for maintaining the steady production of natural gas, water drainage-gas recovery technology is carried out in gas field energetically, The aquifer yield making gas well increases sharply, and a lot of gas wells are forced because extracted waste water cannot process to close Well, have impact on normal gas production and produces.
Oil gas field extracted waste water to oil gas field produce cause a difficult problem while, caused society Problem also appears undoubtedly, causes huge pressure, especially mining area of southwest China to natural environment high The a large amount of extracted waste waters produced in Oil & gas field in sulfur recovery process, this strand of waste water contains a large amount of sulfuration Hydrogen and sulfide, belong to sulfur-containing waste water.If can not get effectively processing, not only environment can be produced Raw severe contamination, also can produce heavy corrosion to waterline, there is severe compromise.
For the process of oil gas field extracted waste water, currently mainly have reinjection into reservoir, comprehensive utilization and Process three kinds of modes of standard discharge.For existing process technique, currently mainly it is by fitting Re-injection after degree process, can't realize standard discharge.According to the reinjection standard that China is existing, right For oil gas field wastewater with high concentration of sulfide, main process target is the hydrogen sulfide in removal water, sulfur Compound and float.
At present, the processing method of sulfur-containing waste water mainly has Physical, chemical method and bioanalysis.Its In, Physical mainly includes stripping and stripping, and stripping is identical with stripping principle, except for the difference that, Stripping is to use gas, and stripping is to use steam;Chemical method mainly includes chemical oxidization method and mixes The solidifying sedimentation method;Bioanalysis mainly includes aerobe method and anaerobic biological process.In three kinds of methods, Physical is the simplest, chemical method owing to there occurs chemical reaction, medicine when waste water sulfur content is higher Agent consumption and the quantity of slag are relatively big, are not therefore suitable for processing the waste water that sulfur content is higher;Bioanalysis is By microorganism, sulfide-oxidation is removed, due to the tolerance limitation of microorganism, process sulfur and contain Measure during higher waste water inefficient, be not the most also suitable for processing the waste water that sulfur content is higher.
In Practical Project practice, due to the limitation in place, gas field, process gas field wastewater with high concentration of sulfide Middle hydrogen sulfide and sulfide mainly use stripping process.Stripping is to allow waste water directly connect with gas Touch, make the volatility poisonous and harmful substance in waste water be diffused into by a certain percentage in gas phase, from And reach to separate the purpose of pollutant from waste water.In view of site condition is limited, currently mainly adopt Carrying out stripping with natural gas, thus consume substantial amounts of natural gas, this has been considerably improved the method The operating cost of desulfurization.Additionally, the method equipment needed thereby volume is big, it is complicated to install maintenance operation, To gas well local environment bad adaptability, and treatment effeciency has much room for improvement.
Chinese patent 201410444573.3 has related to a kind of employing stripping removal high concentration and has contained The process technique of sulfur waste water.Wastewater pH is regulated to 3~4 by this patent, carries out stripping afterwards, Sulfide in stripping residual liquid carries out chemical reaction removal by adding Iron sulfuret..Chinese patent 200710010393.4 processing methods being directed to a kind of sulfur-containing waste water, this patent uses air to expose Sulfide in waste water after gas removal acid adjustment, its principle is identical with stripping principle.Use air exposes Gas problematically, hydrogen sulfide is inflammable harmful influence, mix with air and can form explosive mixing Thing, chance naked light, high heat energy cause combustion explosion.
Chinese patent 200910201614.5 relates to a kind of employing CWO and processes sulfur-bearing The method of waste water, this patent is by COD 2000~200000mg/L, and sulfur weight content is less than The industrial wastewater of 70g/L, at reaction temperature 230~300 DEG C, reaction pressure 3~10MPa, liquid Body air speed 0.5~2.5h-1, gas-liquid raw material standard state lower volume is than the condition being 70~300:1 Under, by using CWO to be removed by the Organic substance in waste water, by complete for the sulfur in waste water Portion is converted into sulfate ion.The severe reaction conditions of CWO, invest, run and Maintenance cost is higher, and equipment is huge, higher to site requirements.CWO is main For removing high COD, being difficult to biodegradable waste water system.
Chinese patent 201110273016.6 relates to the sulfur-containing waste water processing method of a kind of oil gas field, This patent mainly by adding pH adjusting agent and desulfurizing agent, carries out chemical reaction by waste water Sulfur remove, desulfurizing agent uses ferrous sulfate, and the quantity of slag produced due to chemical reaction is relatively big, because of The method of this this patent is applicable to process the highest waste water of sulfur content, this patent clearly define into Sulfur content≤the 3000mg/L of water.
Chinese patent 201210567540.9 is directed to a kind of chemical oxidization method removing industrial wastewater Middle sulfide and organic method, this patent uses chlorine as oxidant.This patent is the brightest Fidelity is determined this patent and is applicable to process COD concentration 2000~20000mg/L, sulfide content The waste water of 200~2000mg/L.Chinese patent 201210210210.4 is directed to a kind of oil gas field Sulfur-containing waste water processing method, this patent is also to be removed by the sulfur in waste water by chemical oxidation, de- Sulfur agent uses persulfate, and uses ferrous sulfate as catalyst.Additionally, Chinese patent 01118462.0 is directed to the sulfur in a kind of chemical oxidization method removing waste water and the method for ammonia, and specially Profit 201110273016.6 is identical, and the quantity of slag produced due to chemical reaction is relatively big, these patents All it is applicable to process the waste water that sulfur content is the highest.
Summary of the invention
For defect present in prior art, it is an object of the invention to provide a kind of oil gas field The reinjection treatment method up to standard of wastewater with high concentration of sulfide, use negative pressure desulfurization+chemical catalytic oxidation+ Flocculating sedimentation+organic membrane filter technology, can effectively remove the sulfide in waste water, solves oil gas The problem that in the wastewater with high concentration of sulfide re-injection process of field, sulfur content is too high, solves existing treatment technology equipment Huge, complex process, inefficient, environmental suitability is poor, operating cost is high, be difficult to safeguard Etc. shortcoming.
For reaching object above, the present invention adopts the technical scheme that:
A kind of reinjection treatment method up to standard of the wastewater with high concentration of sulfide of oil gas field, it is characterised in that: profit Deposit with hydrogen sulfide form with the sulfide in oil gas field wastewater with high concentration of sulfide waste water in acid condition Characteristic, first, use negative pressure desulfurization technology the most of hydrogen sulfide stripping in waste water is gone out Carry out centralized burning;Secondly, use chemical catalytic oxidation technology by the remnants in negative pressure desulfurization water outlet Oxidation of Hydrogen Sulfide;Afterwards, catalytic oxidation desulfurization water outlet carries out flocculating sedimentation;Finally, flocculation is heavy Fall water outlet enters organic membrane filter unit and carries out organic membrane filter, and water outlet sulfur content, float contain Amount and oil content meet oil gas field reinjected water standard.
On the basis of technique scheme, specifically include following steps:
Step 1, wastewater with high concentration of sulfide, after first time pH regulator, enters negative pressure desulfurization unit Carry out desulfurization;The hydrogen sulfide produced after negative pressure desulfurization is collected and is carried out burning disposal;
Step 2, negative pressure desulfurization water outlet, after second time pH regulator, enters chemical catalysis oxygen Change unit and carry out treating technology desulfurization;
Step 3, catalytic oxidation desulfurization water outlet, after third time pH regulator, enters flocculation heavy Fall unit carries out flocculating sedimentation;Outward transport is concentrated to process after flocculating sedimentation slag class is cured;
Step 4, flocculating sedimentation water outlet enters organic membrane filter unit and carries out organic membrane filter, has Machine film filtration effluent carries out reinjection technology.
On the basis of technique scheme, the main water quality of the wastewater with high concentration of sulfide of described oil gas field It is characterized as: sulfide 2000~20000mg/L, total dissolved solid 10000~50000 Mg/L, float 500~5000mg/L, oil content 0~100mg/L.
Oil gas field height sulfur-bearing on the basis of technique scheme, after step 1~4 process Waste water, and water outlet sulfur content < 0.5mg/L, oil content < 5mg/L, float < 1mg/L are full Foot oil gas field reinjected water standard.
On the basis of technique scheme, described negative pressure desulfurization unit arranges circulating pump and gives up Water circulates, and reflux ratio is 2~5:1.
On the basis of technique scheme, in step 1, the tune used by pH regulator for the first time Joint agent is the one in hydrochloric acid, sulphuric acid or nitric acid;
Wastewater with high concentration of sulfide is after first time pH regulator, and pH scope is 4~6.
On the basis of technique scheme, in step 2, the tune used by pH regulator for the second time Joint agent is the one in hydrochloric acid, sulphuric acid or nitric acid;
Negative pressure desulfurization water outlet is after second time pH regulator, and pH scope is 3~4.
On the basis of technique scheme, in step 3, the tune used by pH regulator for the third time Joint agent is sodium hydroxide;
Catalytic oxidation desulfurization water outlet is after third time pH regulator, and pH scope is 8~9.
On the basis of technique scheme, in step 1, the waste water of negative pressure desulfurization unit stops Time is 20~30min;
The inflow temperature of negative pressure desulfurization unit is 35~45 DEG C, runs negative pressure and is -0.04~-0.07MPa.
On the basis of technique scheme, in step 2, described treating technology desulfurization is Sulphion catalysis is oxidized to sulfate ion;
The oxidant of described chemical catalytic oxidation unit is hydrogen peroxide, and catalyst is ferrous sulfate;
Oxidizer is 100~300mg/L, and catalyst amount is 40~120mg/L.
On the basis of technique scheme, in step 3, the flocculation aid of flocculating sedimentation unit is Anion-polyacrylamide, molecular weight 5,000,000~8,000,000;
The flocculation aid consumption of flocculating sedimentation unit is 2-5mg/L;
The flocculating sedimentation time is 10~20min.
On the basis of technique scheme, in step 4, the filtration shape of organic membrane filter unit Formula is that Ge Er filters;
The membrane material of organic membrane filter unit is politef, membrane aperture 0.1~0.25 μm;
The membrane flux of organic membrane filter unit controls 300~500L/m2·h。
The reinjection treatment method up to standard of the wastewater with high concentration of sulfide of oil gas field of the present invention, uses negative Pressure-off sulfur+chemical catalytic oxidation+flocculating sedimentation+organic membrane filter technology, can effectively remove waste water In sulfide, solve the problem that sulfur content is too high in oil gas field wastewater with high concentration of sulfide re-injection process, Solve that existing treatment technology equipment is huge, complex process, inefficient, environmental suitability is poor, Operating cost is high, be difficult to the shortcomings such as maintenance.
Accompanying drawing explanation
The present invention has a drawings described below:
The process chart of Fig. 1 present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail.
The reinjection treatment method up to standard of the wastewater with high concentration of sulfide of oil gas field of the present invention, utilizes oil Sulfide in gas field wastewater with high concentration of sulfide waste water in acid condition exists with hydrogen sulfide form Characteristic, first, uses negative pressure desulfurization technology the most of hydrogen sulfide stripping in waste water out to be collected Middle burning;Secondly, use chemical catalytic oxidation technology by the remaining sulfuration in negative pressure desulfurization water outlet Hydroxide;Afterwards, catalytic oxidation desulfurization water outlet carries out flocculating sedimentation;Finally, flocculating sedimentation goes out Water enters organic membrane filter unit and carries out organic membrane filter, finally realizes oil gas field wastewater with high concentration of sulfide Middle sulfide, float and oil deep removal purpose, water outlet sulfur content, suspension content and Oil content meets oil gas field reinjected water standard.Specifically include following steps:
Step 1, wastewater with high concentration of sulfide, after first time pH regulator, enters negative pressure desulfurization unit Carry out desulfurization;The hydrogen sulfide produced after negative pressure desulfurization is collected and is carried out burning disposal;
Step 2, negative pressure desulfurization water outlet, after second time pH regulator, enters chemical catalysis oxygen Change unit and carry out treating technology desulfurization;
Step 3, catalytic oxidation desulfurization water outlet, after third time pH regulator, enters flocculation heavy Fall unit carries out flocculating sedimentation;Outward transport is concentrated to process after flocculating sedimentation slag class is cured;
Step 4, flocculating sedimentation water outlet enters organic membrane filter unit and carries out organic membrane filter, has Machine film filtration effluent carries out reinjection technology.
On the basis of technique scheme, wastewater with high concentration of sulfide described in step 1 be (oil gas field Wastewater with high concentration of sulfide) main water quality characteristic be: sulfide 2000~20000mg/L, always dissolve Property solid 10000~50000mg/L, float 500~5000mg/L, oil content 0~100 mg/L。
Oil gas field height sulfur-bearing on the basis of technique scheme, after step 1~4 process Waste water, and water outlet sulfur content < 0.5mg/L, oil content < 5mg/L, float < 1mg/L are full Foot oil gas field reinjected water standard.
On the basis of technique scheme, described negative pressure desulfurization unit arranges circulating pump and gives up Water circulates, and reflux ratio is 2~5:1.
On the basis of technique scheme, in step 1, the tune used by pH regulator for the first time Joint agent is the one in hydrochloric acid, sulphuric acid or nitric acid;
Wastewater with high concentration of sulfide is after first time pH regulator, and pH scope is 4~6.
On the basis of technique scheme, in step 2, the tune used by pH regulator for the second time Joint agent is the one in hydrochloric acid, sulphuric acid or nitric acid;
Negative pressure desulfurization water outlet is after second time pH regulator, and pH scope is 3~4.
On the basis of technique scheme, in step 3, the tune used by pH regulator for the third time Joint agent is sodium hydroxide;
Catalytic oxidation desulfurization water outlet is after third time pH regulator, and pH scope is 8~9.
On the basis of technique scheme, in step 1, the waste water of negative pressure desulfurization unit stops Time is 20~30min;
The inflow temperature of negative pressure desulfurization unit is 35~45 DEG C, runs negative pressure and is -0.04~-0.07MPa.
On the basis of technique scheme, in step 2, described treating technology desulfurization is Sulphion catalysis is oxidized to sulfate ion;
The oxidant of described chemical catalytic oxidation unit is hydrogen peroxide, and catalyst is ferrous sulfate;
Oxidizer is 100~300mg/L, and catalyst amount is 40~120mg/L.
On the basis of technique scheme, in step 3, the flocculation aid of flocculating sedimentation unit is Anion-polyacrylamide, molecular weight 5,000,000~8,000,000;
The flocculation aid consumption of flocculating sedimentation unit is 2-5mg/L;
The flocculating sedimentation time is 10~20min.
On the basis of technique scheme, in step 4, the filtration shape of organic membrane filter unit Formula is that Ge Er filters;
The membrane material of organic membrane filter unit is politef, membrane aperture 0.1~0.25 μm;
The membrane flux of organic membrane filter unit controls 300~500L/m2·h。
The present invention is with the essential distinction of prior art: for using stripping in prior art , complex process, inefficient, ring huge with vaporizing extract process process oil gas field wastewater with high concentration of sulfide equipment The problem that border bad adaptability, operating cost are high, the present invention uses negative pressure desulfurization+chemical catalysis oxygen Change technical finesse oil gas field wastewater with high concentration of sulfide.By using this technology, it is achieved that oil gas field height contains Efficient, quick, the low cost reinjection technology up to standard of sulfur waste water.Compared to the prior art, this The bright technical equipment related to is simple, operation maintenance is easy, adaptive capacity to environment is strong, desulfuration efficiency High, skid process can be realized, operating cost is substantially reduced, Technical Economy is good.For oil Gas field wastewater with high concentration of sulfide, the reinjection technology technology up to standard that the present invention relates to is the most economical, reasonable, Feasible.It provides the benefit that:
1, the present invention uses negative pressure desulfurization technical finesse oil gas field wastewater with high concentration of sulfide, and stripping, Stripping Desulfuration technology is compared, and the technical equipment that the present invention relates to is simple, automaticity is high, fortune Row is safeguarded easily, adaptive capacity to environment is strong, floor space is few, and desulfuration efficiency is high, can realize sled Dressization process, operating cost are substantially reduced.The negative pressure desulfurization technology that the present invention uses is especially suitable Wastewater with high concentration of sulfide in place and auxiliary facility imperfection area processes;
2, the negative pressure desulfurization unit of the present invention is by using circulating pump to carry out waste water circulation, accelerates Hydrogen sulfide in wastewater with high concentration of sulfide overflows, and shortens waste water desulfurization time, improves desulfurized effect;
3, the negative pressure desulfurization unit of the present invention passes through the coupling between negative pressure and wastewater pH, While reducing waste water desulphurization cost, the hydrogen sulfide eliminated in waste water of maximal efficiency;
4, in the present invention chemical catalytic oxidation unit owing to generating the colloid of iron salt, therefore without Need to add flocculant, only need to add a small amount of flocculation aid achieves that flocculating sedimentation;
5, the present invention passes through negative pressure desulfurization technology and the efficient coupling of chemical catalytic oxidation technology, On the basis of using negative pressure desulfurization technology to remove the most of sulphion in waste water, employing again Learn the catalytic oxidation technologies degree of depth and remove a small amount of sulphion of residual in waste water so that the sulfur in waste water Ion concentration is preferably minimized, and decreases the simple reagent consumption used needed for chemical oxidation and waste residue Amount, operating cost is substantially reduced;
6, the present invention utilizes gore film to process the advantage of high suspended matter content waste water, by using Ge Er organic membrane filter, solves the filtration problem of the high oil gas field waste water of suspension content, gram Take organic membrane and process the limitation of oil gas field high suspended matter content waste water;
7, the present invention is by using gore film to process the oil gas field waste water of high suspended matter content, keeps away Exempt to use the high flow rate operational mode of other form membrane filtrations, reduce operating cost, and Membrane flux is high, and cycle of operation is long;
8, the method for the present invention is used to carry out the reinjection technology up to standard of oil gas field wastewater with high concentration of sulfide, Effectively overcome existing stripping and the drawback of stripping process desulfurization, solve high suspended matter after desulfurization The filtration problem of the oil gas field waste water of content.
It is below some specific embodiments.
Embodiment 1
The main water quality characteristic of oil gas field wastewater with high concentration of sulfide is: sulfide 2000mg/L, always Soluble solid 10000mg/L, float 500mg/L, oil content 0mg/L.
Process step is as follows:
First, wastewater with high concentration of sulfide uses sulphuric acid to regulate for the first time the pH to 6 of waste water, laggard Entering negative pressure desulfurization unit and carry out desulfurization, the operating condition of negative pressure desulfurization is: inflow temperature 35 DEG C, running negative pressure-0.04MPa, hydraulic detention time 20min, the reflux ratio of circulating pump is 5:1;
Secondly, negative pressure desulfurization water outlet uses sulphuric acid second time to regulate the pH to 3 of waste water, afterwards Entering chemical catalytic oxidation unit and carry out treating technology desulfurization, oxidant is hydrogen peroxide, Consumption is 100mg/L, and catalyst is ferrous sulfate, and consumption is 40mg/L;
Afterwards, catalytic oxidation desulfurization water outlet uses the pH of sodium hydroxide third time regulation waste water to arrive 8, enter flocculating sedimentation unit afterwards and carry out flocculating sedimentation, flocculation aid is anionic polypropylene Amide, molecular weight 5,000,000, flocculation aid consumption is 2mg/L, and the flocculating sedimentation time is 10min;
Finally, flocculating sedimentation unit water outlet enters organic membrane filter unit and carries out Ge Er filtration, Organic film material is politef, and membrane aperture is 0.1 μm, and gore film flux controls 500 L/m2·h.Under this constant flux, in the running of continuous 15 days, the operation of microfiltration Pressure is risen to the 0.09MPa in later stage by initial 0.04MPa.
Oil gas field wastewater with high concentration of sulfide after above-mentioned steps processes, water outlet sulfur content < 0.5 Mg/L, oil content < 5mg/L, float < 1mg/L, meet oil gas field reinjected water standard.
The hydrogen sulfide produced after negative pressure desulfurization is collected and is carried out burning disposal, and organic membrane filter goes out Water carries out reinjection technology, concentrates outward transport to process after flocculating sedimentation slag class is cured.
Embodiment 2
The main water quality characteristic of oil gas field wastewater with high concentration of sulfide is: sulfide 5000mg/L, always Soluble solid 20000mg/L, float 1500mg/L, oil content 30mg/L.
Process step is as follows:
First, wastewater with high concentration of sulfide uses hydrochloric acid to regulate the pH to 4.5 of waste water for the first time, afterwards Entering negative pressure desulfurization unit and carry out desulfurization, the operating condition of negative pressure desulfurization is: inflow temperature 40 DEG C, running negative pressure-0.05MPa, hydraulic detention time 25min, the reflux ratio of circulating pump is 4:1;
Secondly, negative pressure desulfurization water outlet uses hydrochloric acid second time to regulate the pH to 3.3 of waste water, it Rear entrance chemical catalytic oxidation unit carries out treating technology desulfurization, and oxidant is dioxygen Water, consumption is 100mg/L, and catalyst is ferrous sulfate, and consumption is 40mg/L;
Afterwards, catalytic oxidation desulfurization water outlet uses the pH of sodium hydroxide third time regulation waste water to arrive 8.3, enter flocculating sedimentation unit afterwards and carry out flocculating sedimentation, flocculation aid is anionic poly-third Acrylamide, molecular weight 6,000,000, flocculation aid consumption is 2mg/L, and the flocculating sedimentation time is 10min;
Finally, flocculating sedimentation unit water outlet enters organic membrane filter unit and carries out Ge Er filtration, Organic film material is politef, and membrane aperture is 0.15 μm, and gore film flux controls 450L/m2·h.Under this constant flux, in the running of continuous 15 days, microfiltration Operation pressure is risen to the 0.11MPa in later stage by initial 0.04MPa.
Oil gas field wastewater with high concentration of sulfide after above-mentioned steps processes, water outlet sulfur content < 0.5 Mg/L, oil content < 5mg/L, float < 1mg/L, meet oil gas field reinjected water standard.
The hydrogen sulfide produced after negative pressure desulfurization is collected and is carried out burning disposal, and organic membrane filter goes out Water carries out reinjection technology, concentrates outward transport to process after flocculating sedimentation slag class is cured.
Embodiment 3
The main water quality characteristic of oil gas field wastewater with high concentration of sulfide is: sulfide 10000mg/L, always Soluble solid 30000mg/L, float 3000mg/L, oil content 50mg/L.
Process step is as follows:
First, wastewater with high concentration of sulfide uses nitric acid to regulate for the first time the pH to 5 of waste water, laggard Entering negative pressure desulfurization unit and carry out desulfurization, the operating condition of negative pressure desulfurization is: inflow temperature 45 DEG C, running negative pressure-0.06MPa, hydraulic detention time 30min, the reflux ratio of circulating pump is 3:1;
Secondly, negative pressure desulfurization water outlet uses nitric acid second time to regulate the pH to 3.5 of waste water, it Rear entrance chemical catalytic oxidation unit carries out treating technology desulfurization, and oxidant is dioxygen Water, consumption is 200mg/L, and catalyst is ferrous sulfate, and consumption is 80mg/L;
Afterwards, catalytic oxidation desulfurization water outlet uses the pH of sodium hydroxide third time regulation waste water to arrive 8.5, enter flocculating sedimentation unit afterwards and carry out flocculating sedimentation, flocculation aid is anionic poly-third Acrylamide, molecular weight 7,000,000, flocculation aid consumption is 3mg/L, and the flocculating sedimentation time is 20min;
Finally, flocculating sedimentation unit water outlet enters organic membrane filter unit and carries out Ge Er filtration, Organic film material is politef, and membrane aperture is 0.2 μm, and gore film flux controls 400 L/m2·h.Under this constant flux, in the running of continuous 15 days, the operation of microfiltration Pressure is risen to the 0.12MPa in later stage by initial 0.05MPa.
Oil gas field wastewater with high concentration of sulfide after above-mentioned steps processes, water outlet sulfur content < 0.5 Mg/L, oil content < 5mg/L, float < 1mg/L, meet oil gas field reinjected water standard.
The hydrogen sulfide produced after negative pressure desulfurization is collected and is carried out burning disposal, and organic membrane filter goes out Water carries out reinjection technology, concentrates outward transport to process after flocculating sedimentation slag class is cured.
Embodiment 4
The main water quality characteristic of oil gas field wastewater with high concentration of sulfide is: sulfide 20000mg/L, always Soluble solid 50000mg/L, float 5000mg/L, oil content 80mg/L.
Process step is as follows:
First, wastewater with high concentration of sulfide uses hydrochloric acid to regulate the pH to 5.5 of waste water for the first time, afterwards Entering negative pressure desulfurization unit and carry out desulfurization, the operating condition of negative pressure desulfurization is: inflow temperature 45 DEG C, running negative pressure-0.07MPa, hydraulic detention time 30min, the reflux ratio of circulating pump is 2:1;
Secondly, negative pressure desulfurization water outlet uses hydrochloric acid second time to regulate the pH to 4 of waste water, afterwards Entering chemical catalytic oxidation unit and carry out treating technology desulfurization, oxidant is hydrogen peroxide, Consumption is 300mg/L, and catalyst is ferrous sulfate, and consumption is 120mg/L;
Afterwards, catalytic oxidation desulfurization water outlet uses the pH of sodium hydroxide third time regulation waste water to arrive 9, enter flocculating sedimentation unit afterwards and carry out flocculating sedimentation, flocculation aid is anionic polypropylene Amide, molecular weight 8,000,000, flocculation aid consumption is 5mg/L, and the flocculating sedimentation time is 20min;
Finally, flocculating sedimentation unit water outlet enters organic membrane filter unit and carries out Ge Er filtration, Organic film material is politef, and membrane aperture is 0.2 μm, and gore film flux controls 350 L/m2·h.Under this constant flux, in the running of continuous 15 days, the operation of microfiltration Pressure is risen to the 0.12MPa in later stage by initial 0.04MPa.
Oil gas field wastewater with high concentration of sulfide after above-mentioned steps processes, water outlet sulfur content < 0.5 Mg/L, oil content < 5mg/L, float < 1mg/L, meet oil gas field reinjected water standard.
The hydrogen sulfide produced after negative pressure desulfurization is collected and is carried out burning disposal, and organic membrane filter goes out Water carries out reinjection technology, concentrates outward transport to process after flocculating sedimentation slag class is cured.
Embodiment 5
The main water quality characteristic of oil gas field wastewater with high concentration of sulfide is: sulfide 20000mg/L, always Soluble solid 50000mg/L, float 5000mg/L, oil content 100mg/L.
Process step is as follows:
First, wastewater with high concentration of sulfide uses hydrochloric acid to regulate for the first time the pH to 4 of waste water, laggard Entering negative pressure desulfurization unit and carry out desulfurization, the operating condition of negative pressure desulfurization is: inflow temperature 45 DEG C, running negative pressure-0.07MPa, hydraulic detention time 30min, the reflux ratio of circulating pump is 3:1;
Secondly, negative pressure desulfurization water outlet uses hydrochloric acid second time to regulate the pH to 4 of waste water, afterwards Entering chemical catalytic oxidation unit and carry out treating technology desulfurization, oxidant is hydrogen peroxide, Consumption is 200mg/L, and catalyst is ferrous sulfate, and consumption is 80mg/L;
Afterwards, catalytic oxidation desulfurization water outlet uses the pH of sodium hydroxide third time regulation waste water to arrive 8.6, enter flocculating sedimentation unit afterwards and carry out flocculating sedimentation, flocculation aid is anionic poly-third Acrylamide, molecular weight 8,000,000, flocculation aid consumption is 5mg/L, and the flocculating sedimentation time is 20min;
Finally, flocculating sedimentation unit water outlet enters organic membrane filter unit and carries out Ge Er filtration, Organic film material is politef, and membrane aperture is 0.25 μm, and gore film flux controls 300L/m2·h.Under this constant flux, in the running of continuous 15 days, microfiltration Operation pressure is risen to the 0.11MPa in later stage by initial 0.03MPa.
Oil gas field wastewater with high concentration of sulfide after above-mentioned steps processes, water outlet sulfur content < 0.5 Mg/L, oil content < 5mg/L, float < 1mg/L, meet oil gas field reinjected water standard.
The hydrogen sulfide produced after negative pressure desulfurization is collected and is carried out burning disposal, and organic membrane filter goes out Water carries out reinjection technology, concentrates outward transport to process after flocculating sedimentation slag class is cured.
The foregoing is only the preferable possible embodiments of the present invention, not thereby limit to the present invention's The scope of the claims, therefore the equivalence change that every utilization description of the invention and accompanying drawing content are made, all It is contained in protection scope of the present invention.
The content not being described in detail in this specification belongs to known in professional and technical personnel in the field Prior art.

Claims (12)

1. the reinjection treatment method up to standard of the wastewater with high concentration of sulfide of an oil gas field, it is characterised in that: Utilize the sulfide in oil gas field wastewater with high concentration of sulfide waste water in acid condition with hydrogen sulfide form The characteristic existed, first, uses negative pressure desulfurization technology by the most of hydrogen sulfide stripping in waste water Out centralized burning;Secondly, residual by negative pressure desulfurization water outlet of chemical catalytic oxidation technology is used Remaining Oxidation of Hydrogen Sulfide;Afterwards, catalytic oxidation desulfurization water outlet carries out flocculating sedimentation;Finally, flocculation Sedimentation water outlet enters organic membrane filter unit and carries out organic membrane filter, water outlet sulfur content, float Content and oil content meet oil gas field reinjected water standard.
2. the reinjection technology side up to standard of the wastewater with high concentration of sulfide of oil gas field as claimed in claim 1 Method, it is characterised in that specifically include following steps:
Step 1, wastewater with high concentration of sulfide, after first time pH regulator, enters negative pressure desulfurization unit Carry out desulfurization;The hydrogen sulfide produced after negative pressure desulfurization is collected and is carried out burning disposal;
Step 2, negative pressure desulfurization water outlet, after second time pH regulator, enters chemical catalysis oxygen Change unit and carry out treating technology desulfurization;
Step 3, catalytic oxidation desulfurization water outlet, after third time pH regulator, enters flocculation heavy Fall unit carries out flocculating sedimentation;Outward transport is concentrated to process after flocculating sedimentation slag class is cured;
Step 4, flocculating sedimentation water outlet enters organic membrane filter unit and carries out organic membrane filter, has Machine film filtration effluent carries out reinjection technology.
3. the reinjection technology side up to standard of the wastewater with high concentration of sulfide of oil gas field as claimed in claim 2 Method, it is characterised in that: the main water quality characteristic of the wastewater with high concentration of sulfide of described oil gas field is: sulfuration Thing 2000~20000mg/L, total dissolved solid 10000~50000mg/L, float 500~5000mg/L, oil content 0~100mg/L.
4. the reinjection technology side up to standard of the wastewater with high concentration of sulfide of oil gas field as claimed in claim 2 Method, it is characterised in that: the oil gas field wastewater with high concentration of sulfide after step 1~4 process, water outlet sulfur < 0.5mg/L, oil content < 5mg/L, float < 1mg/L meet oil gas field re-injection to content Water quality standard.
5. the reinjection technology side up to standard of the wastewater with high concentration of sulfide of oil gas field as claimed in claim 2 Method, it is characterised in that: described negative pressure desulfurization unit arranges circulating pump and carries out waste water circulation, backflow Ratio is 2~5:1.
6. the reinjection technology side up to standard of the wastewater with high concentration of sulfide of oil gas field as claimed in claim 2 Method, it is characterised in that: in step 1, for the first time the regulator used by pH regulator be hydrochloric acid, One in sulphuric acid or nitric acid;
Wastewater with high concentration of sulfide is after first time pH regulator, and pH scope is 4~6.
7. the reinjection technology side up to standard of the wastewater with high concentration of sulfide of oil gas field as claimed in claim 2 Method, it is characterised in that: in step 2, for the second time the regulator used by pH regulator be hydrochloric acid, One in sulphuric acid or nitric acid;
Negative pressure desulfurization water outlet is after second time pH regulator, and pH scope is 3~4.
8. the reinjection technology side up to standard of the wastewater with high concentration of sulfide of oil gas field as claimed in claim 2 Method, it is characterised in that: in step 3, the regulator used by pH regulator is hydroxide for the third time Sodium;
Catalytic oxidation desulfurization water outlet is after third time pH regulator, and pH scope is 8~9.
9. the reinjection technology side up to standard of the wastewater with high concentration of sulfide of oil gas field as claimed in claim 2 Method, it is characterised in that: in step 1, the retention time of sewage of negative pressure desulfurization unit is 20~30min;
The inflow temperature of negative pressure desulfurization unit is 35~45 DEG C, runs negative pressure and is -0.04~-0.07MPa.
10. the reinjection technology side up to standard of the wastewater with high concentration of sulfide of oil gas field as claimed in claim 2 Method, it is characterised in that: in step 2, described treating technology desulfurization is to be catalyzed by sulphion It is oxidized to sulfate ion;
The oxidant of described chemical catalytic oxidation unit is hydrogen peroxide, and catalyst is ferrous sulfate;
Oxidizer is 100~300mg/L, and catalyst amount is 40~120mg/L.
The reinjection technology side up to standard of the wastewater with high concentration of sulfide of 11. oil gas fields as claimed in claim 2 Method, it is characterised in that: in step 3, the flocculation aid of flocculating sedimentation unit is anionic poly-third Acrylamide, molecular weight 5,000,000~8,000,000;
The flocculation aid consumption of flocculating sedimentation unit is 2-5mg/L;
The flocculating sedimentation time is 10~20min.
The reinjection technology side up to standard of the wastewater with high concentration of sulfide of 12. oil gas fields as claimed in claim 2 Method, it is characterised in that: in step 4, the filtered version of organic membrane filter unit is that Ge Er filters;
The membrane material of organic membrane filter unit is politef, membrane aperture 0.1~0.25 μm;
The membrane flux of organic membrane filter unit controls 300~500L/m2·h。
CN201510340481.5A 2015-06-18 2015-06-18 A kind of reinjection treatment method up to standard of the wastewater with high concentration of sulfide of oil gas field Pending CN106256780A (en)

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CN109824165A (en) * 2017-11-23 2019-05-31 上海江柘环境工程技术有限公司 A kind of sulfur-containing waste water treatment process
CN112062340A (en) * 2020-09-08 2020-12-11 江苏众志新禹环境科技有限公司 Method for treating sulfur-containing wastewater
RU2741546C1 (en) * 2020-03-13 2021-01-26 Альфия Гариповна Ахмадуллина Method of oxidising sodium sulphide

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CN203807199U (en) * 2014-01-26 2014-09-03 山东洁通环保设备有限公司 Device for removing hydrogen sulfide by vacuum membrane method
CN203976507U (en) * 2014-06-24 2014-12-03 杭州松源机械制造有限公司 The water treatment system that reverse osmosis is degassed

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CN102701487A (en) * 2012-06-25 2012-10-03 杨德敏 Method for treating sulfur-containing wastewater of oil and gas field
CN103880202A (en) * 2012-12-12 2014-06-25 王炜 Rejection processing technology for gas production wastewater in sulfur acid containing gas field
CN203807199U (en) * 2014-01-26 2014-09-03 山东洁通环保设备有限公司 Device for removing hydrogen sulfide by vacuum membrane method
CN203976507U (en) * 2014-06-24 2014-12-03 杭州松源机械制造有限公司 The water treatment system that reverse osmosis is degassed

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Publication number Priority date Publication date Assignee Title
CN109824165A (en) * 2017-11-23 2019-05-31 上海江柘环境工程技术有限公司 A kind of sulfur-containing waste water treatment process
RU2741546C1 (en) * 2020-03-13 2021-01-26 Альфия Гариповна Ахмадуллина Method of oxidising sodium sulphide
CN112062340A (en) * 2020-09-08 2020-12-11 江苏众志新禹环境科技有限公司 Method for treating sulfur-containing wastewater

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Application publication date: 20161228