CN104803425B - Method for removing hydrogen sulfide from high-sulfur oilfield produced water - Google Patents
Method for removing hydrogen sulfide from high-sulfur oilfield produced water Download PDFInfo
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- CN104803425B CN104803425B CN201410039118.5A CN201410039118A CN104803425B CN 104803425 B CN104803425 B CN 104803425B CN 201410039118 A CN201410039118 A CN 201410039118A CN 104803425 B CN104803425 B CN 104803425B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 134
- 229910052717 sulfur Inorganic materials 0.000 title claims abstract description 109
- 239000011593 sulfur Substances 0.000 title claims abstract description 109
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 title claims abstract description 69
- 229910000037 hydrogen sulfide Inorganic materials 0.000 title claims abstract description 69
- 238000000034 method Methods 0.000 title claims abstract description 41
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 116
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 77
- 239000007789 gas Substances 0.000 claims abstract description 60
- 239000003345 natural gas Substances 0.000 claims abstract description 40
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 35
- 230000023556 desulfurization Effects 0.000 claims abstract description 33
- 239000007788 liquid Substances 0.000 claims abstract description 11
- 230000008569 process Effects 0.000 claims description 19
- 239000005864 Sulphur Substances 0.000 claims description 9
- 238000000605 extraction Methods 0.000 claims description 8
- 229910052739 hydrogen Inorganic materials 0.000 claims description 8
- 239000001257 hydrogen Substances 0.000 claims description 8
- 150000003839 salts Chemical class 0.000 claims description 8
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 6
- 239000003513 alkali Substances 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 238000004458 analytical method Methods 0.000 claims description 4
- 238000005987 sulfurization reaction Methods 0.000 claims description 4
- 241000370738 Chlorion Species 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 239000002332 oil field water Substances 0.000 claims 1
- 239000007787 solid Substances 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 8
- 239000002699 waste material Substances 0.000 abstract description 3
- 238000000926 separation method Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 86
- 239000012071 phase Substances 0.000 description 7
- LSDPWZHWYPCBBB-UHFFFAOYSA-N Methanethiol Chemical compound SC LSDPWZHWYPCBBB-UHFFFAOYSA-N 0.000 description 6
- 230000007613 environmental effect Effects 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
- 239000007791 liquid phase Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000004587 chromatography analysis Methods 0.000 description 3
- 239000010779 crude oil Substances 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000010850 salt effect Methods 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 229910000885 Dual-phase steel Inorganic materials 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 239000003643 water by type Substances 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000005292 vacuum distillation Methods 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
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- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
- Physical Water Treatments (AREA)
Abstract
The invention discloses a method for removing hydrogen sulfide from high-sulfur oilfield produced water, and belongs to the field of hydrogen sulfide removal. The method adopting natural gas as a gas source and adopting a gas stripping technology to desulfurize comprises the following steps: determining the content of hydrogen sulfide in sulfur-containing oilfield produced water and the volume ratio of the natural gas to the sulfur-containing oilfield produced water; and adjusting the pH value of the produced water to 3-4 to make sulfur in the produced water exist as hydrogen sulfide, allowing the natural gas to contact with the produced water in a stripping tower in a countercurrent manner, and carrying out gas-liquid separation to remove hydrogen sulfide. The natural gas in an oilfield produced water treatment station is adopted as the gas source, and a stripping technology is adopted to remove sulfur in the sulfur-containing oilfield produced water, so the desulfurization rate is high, and compared with methods adopting steam as the gas source, the method disclosed in the invention has the advantages of no need of a steam boiler or a pipe network system, and low cost; the oilfield natural gas is sufficient, so the demand of hydrogen sulfide removal of large-scale oilfield produced water can be met; and removed hydrogen sulfide is conveyed to a natural gas processing station and is processed, so the processed hydrogen sulfide can be comprehensively utilized, and no waste liquid is discharged.
Description
Technical field
The present invention relates to hydrogen sulfide stripping field, more particularly to a kind of side of high sulfur-bearing oilfield recovered water removing hydrogen sulfide
Method.
Background technology
Oil field extracted water is the water produced during oil water flooding recovery, wherein containing it is substantial amounts of be difficult to degrade it is organic
The ion of pollutant and high concentration, does not reach re-injection and the directly standard of discharge, needs to process it, until it reaches discharge
Standard.
Contain H2S in sulfur-bearing oil field extracted water, and H2S has corrosiveness, if directly sulfur-bearing oil field extracted water is passed through
Oil field produced water treatment facilities, can cause the corrosion of pipeline and equipment, and safety in production is caused a hidden trouble.The simultaneously volatilization of H2S and
Separate out, personal safety can be had a strong impact on.Therefore, need to remove sulphur therein before processing sulfur-bearing oil field extracted water, with
Ensure safety in production.All over the world sulfur content in sulfur-bearing oil field extracted water is different, in oil field at home recovered water the content of sulphur compared with
It is low, less than 20ppm, typically do not carry out desulfurization process.
At present, domestic oil plant sulfur-containing waste water takes off H2S with steam as source of the gas, using single column low pressure gas stripping process, in pH value 7
～8, under conditions of vacuum 0.09MPa-0.1MPa, 20-30 minutes are extracted, treatment scale is less.In the mistake for realizing the present invention
Cheng Zhong, inventor has found that prior art at least has problems with：
The content of Middle East sulfur-bearing oil field extracted water hydrogen sulfide be 150-600ppm, the content of hydrogen sulfide in recovered water
Height is low using existing sulfur removal technology desulfurization degree, it is impossible to meet the follow-up processing requirement of oil field extracted water, give subsequent treatment band
Come the hidden danger kept the safety in production；Meanwhile, Middle East sulfur-bearing oil field extracted water amount is big, if using steam as source of the gas, using air lift work
Skill removes hydrogen sulfide, and the quantity of steam of needs is big, it is impossible to meet the process that extensive oil field extracted water removes hydrogen sulfide；Need simultaneously
Large-scale steam boiler and pipe network system are built, expense and energy consumption are big；And substantial amounts of sulfur-containing waste water is generated after air lift, cause
Environmental pollution.
The content of the invention
Can not meet asking for Middle East sulfur-bearing oil field extracted water removing hydrogen sulfide technology needs to solve prior art
Topic, embodiments provides a kind of method that sulfur-bearing oil field extracted water removes hydrogen sulfide.The technical scheme is as follows：
A kind of method that high sulfur-bearing oilfield recovered water removes hydrogen sulfide, it is characterised in that methods described is with natural gas as gas
Source, using air- extraction desulfurization, is specifically operated as follows：
Content, the salt content of chlorion in analysis sulfur-bearing oil field extracted water, and then determine in the sulfur-bearing oil field extracted water
The content of hydrogen sulfide；
Determine that the natural gas and the sulfur-bearing are oil field produced according to the content of hydrogen sulfide in the sulfur-bearing oil field extracted water
The volume ratio of water；
The pH value for adjusting sulfur-bearing oil field extracted water is 3-4, then will regulate the sulfur-bearing oil field extracted water of pH value from air lift
The top of tower is input into and flows downward, and by natural gas is from the bottom input of the stripping tower and flows up, makes the sulfur crude
Field recovered water during flowing downward with the natural gas that flows up on the column plate of the stripping tower counter current contacting, by gas
Liquid centrifugation, obtains sulfur-containing gas and desulfurization oil field extracted water, and the sulfur-containing gas are arranged from the tower top of the stripping tower
Go out, the desulfurization oil field extracted water is discharged from the bottom of towe of gas tower.
Specifically, the air- extraction is single column pressurization stripping process.
Further, its pH value is adjusted to 7- by the desulfurization oil field extracted water after discharging from the bottom of towe of stripping tower with alkali lye
8, and into next step processing unit, until it reaches the standard of re-injection or discharge.
Further, it is single into sulfur-containing gas process after the sulfur-containing gas are discharged from the tower top of the stripping tower
Unit carries out the process of next step.
Specifically, the volume ratio of the natural gas and the sulfur-bearing oil field extracted water is（3-8）：1.
Specifically, the temperature of the sulfur-bearing oil field extracted water is 70 DEG C～90 DEG C.
Specifically, the pressure of the stripping tower is 200kpa-350kpa.
Specifically, the content of hydrogen sulfide is 150ppm-600ppm in the sulfur-bearing oil field extracted water.
Specifically, the stripping tower tower diameter is 2-3m.
Specifically, the stripping tower is using the combined trapezoid spray tray suitable for oil-polluted water.
The beneficial effect that technical scheme provided in an embodiment of the present invention is brought is：
The present invention first analyze sulfur-bearing oil field extracted water in chlorion content, salt content, determine salt effect in water
The impact of hydrogen sulfide content, to determine solubility of the hydrogen sulfide in the sulfur-bearing oil field extracted water, and then determines salt effect pair
The impact of hydrogen sulfide content in water, with natural gas as source of the gas, using gas stripping process the sulphur in sulfur-bearing oil field extracted water is removed, and is passed through
Optimization desulfurization process conditions, make gas stripping gas sufficiently contact in stripping tower with high sulfur-bearing oilfield recovered water, and not only desulfurization degree is high,
Can reach more than 90%, and, the sulfur content in sulfur-bearing oil field extracted water is higher, and desulfurization degree is higher；Simultaneously with using steam as
Source of the gas is compared, cost-effective without the need for building steam boiler and pipe network system；With the day in oil field produced water treatment station in the present invention
So gas is source of the gas, and not only tolerance is sufficient, disclosure satisfy that the oil field produced water yield in Middle East is big, carries out extensive oil field extracted water and takes off
The demand of vulcanisation hydrogen technique, and the natural gas containing hydrogen sulfide obtained after air lift can also transport to natural gas processing station
Comprehensively utilize after being processed, without discharging of waste liquid, be conducive to environmental protection.
Description of the drawings
Technical scheme in order to be illustrated more clearly that the embodiment of the present invention, below will be to making needed for embodiment description
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, can be obtaining other according to these accompanying drawings
Accompanying drawing.
Fig. 1 is sulfur-bearing oil field extracted water removing hydrogen sulfide technology flow chart provided in an embodiment of the present invention.
The implication of each symbol is as follows in figure：
1 stripping tower, 2 column plates, 3 sulfur-bearing oil field extracted waters, 4 natural gases, 5 sulfur-containing gas, 6 desulfurization recovered waters, 7 acid solutions, 8
Alkali lye.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to embodiment party of the present invention
Formula is described in further detail.
Referring to Fig. 1, a kind of method that sulfur-bearing oil field extracted water removes hydrogen sulfide, the method bag are embodiments provided
Include：
Methods described with natural gas as source of the gas, using air- extraction desulfurization.Specifically operated in accordance with the following steps：
The content of salt content and hydrogen sulfide in sulfur-bearing oil field extracted water 3 is analyzed first, is determined the natural gas 4 and described is contained
The volume ratio of sulphur oil field extracted water 3；Under the conditions of other conditions are the same from, when salt content is different in recovered water, hydrogen sulfide
Solubility also by difference, therefore, it is determined that should first determine sulfur-bearing before the volume ratio of natural gas 4 and sulfur-bearing oil field extracted water 3
The salt content of oil field extracted water 3, could correctly simulate the hydrogen sulfide content of recovered water, and then determine natural gas 4 and sulfur-bearing oil field
The volume ratio of recovered water 3, to improve the removal efficiency of hydrogen sulfide.
At present, H2S is removed in various water and does not consider that water intermediate ion is tool of the salt effect content for removing hydrogen sulfide
Body affects.
Specifically, the content of hydrogen sulfide is 150ppm-600ppm in the sulfur-bearing oil field extracted water 3.
Specifically, the volume ratio of the natural gas 4 and the sulfur-bearing oil field extracted water 3 is（3-8）：1, in gas stripping process
In, be that the hydrogen sulfide in liquid phase is transferred in gas phase using gas-liquid separation principle, accordingly, it would be desirable to gas phase amount than larger,
When gas-liquid volume ratio is（3-8）：When 1, the removal efficiency highest of hydrogen sulfide.
Then, it is 3-4 to adjust the pH value of sulfur-bearing oil field extracted water 3 with acid solution 7, make sulphur in sulfur-bearing oil field extracted water 3 with
The form of hydrogen sulfide is dissolved in recovered water；
Finally the above-mentioned sulfur-bearing oil field extracted water 3 for regulating pH value is entered into stripping tower 1 simultaneously downwards from the top of stripping tower 1
Flowing, from the bottom of stripping tower 1 is into stripping tower 1 and flows up, sulfur-bearing oil field extracted water 3 is in the process of flowing downward for natural gas
In with the natural gas 4 that flows up on the column plate 2 of stripping tower 1 counter current contacting, by gas liquid separating function, respectively obtain sulfur-bearing
Natural gas 5 and desulfurization oil field extracted water 6, the sulfur-containing gas 5 are discharged from the tower top of stripping tower 1, at sulfur-containing gas
Reason unit removing hydrogen sulfide, the hydrogen sulfide of removing can be comprehensively utilized, and be conducive to environmental protection；Desulfurization oil field extracted water 6 is from gas
The bottom of towe of body tower 1 is discharged.According to GB26983-2011-T《The measure of crude oil hydrogen sulfide, methyl mercaptan and ethanethio》Standard
Regulation, using chromatography the content of hydrogen sulfide in desulfurization oil field extracted water 6 is detected, when hydrogen sulfide contains in desulfurization oil field extracted water
In below 20ppm, the hydrogen sulfide in desulfurization oil field extracted water 6 will not overflow amount from water, and also equipment and pipeline will not be made
Into substantially corrosion, treatment Technology for Petroleum Water Flooding needs are disclosure satisfy that.Therefore, with alkali lye 8 by the pH value of desulfurization oil field extracted water 6
After being adjusted to 7-8, desulfurization oil field extracted water 6 is for further processing, until it reaches re-injection or discharge standard.
Air- extraction equivalent to vacuum distillation, due to add gas stripping gas -- natural gas sulfur component partial pressure in the gas phase is very
It is low, the partial pressure for reducing sulfur component in gas phase is equivalent in the case where stagnation pressure is constant, be conducive to sulfur component from liquid phase to
The mass transfer of gas phase.The characteristics of sulfur-bearing oil field extracted water air lift sulfur removal technology is the sulfur component as the pH value value of recovered water is reduced
In the form of H2S, gas stripping gas countercurrently connects with the recovered water for flowing downward during flowing up in tower on column plate
Touch, because the H2S partial pressures in gas phase are very low, the content of H2S is high in liquid phase, and the H2S of liquid phase enters gas in the presence of concentration difference
Phase, so as to realize that sulfur-bearing oil field extracted water removes the purpose of hydrogen sulfide.
The embodiment that the present invention is provided is directly source of the gas using the natural gas in oil field produced water treatment station, using air lift work
Sulphur in skill removing sulfur-bearing oil field extracted water, compared with steam is as source of the gas, without the need for building steam boiler and pipe network system, saves
Cost of investment and energy cost, while Oilfield Natural Gas Plant tolerance is sufficient, disclosure satisfy that extensive oil field extracted water removing sulfuration
The demand of hydrogen；In addition, the hydrogen sulfide of removing is transported to after natural gas processing station is processed and can comprehensively utilized, without discharging of waste liquid,
Be conducive to environmental protection.Compared with prior art, the method tool of sulfur-bearing oil field extracted water removing hydrogen sulfide provided in an embodiment of the present invention
There is unexpected effect.
Specifically, the temperature of the sulfur-bearing oil field extracted water 3 is 60 DEG C～80 DEG C.It is molten in water that temperature gets over high hydrogen sulfide
Xie Du is lower, therefore can reduce the content of hydrogen sulfide in water by putting forward the method for the temperature of high sulfur-bearing oilfield recovered water 3, but works as
When temperature is higher than 60 DEG C～80 DEG C, continue liter high-temperature affects little to the removal effect of hydrogen sulfide, therefore from the power consumption increasing that heats up
Plus from the point of view of cost, during air lift, the temperature for selecting sulfur-bearing oil field extracted water is 60 DEG C～80 DEG C.
Specifically, the pressure of the stripping tower is 200kpa-350kpa.The lower desulfuration efficiency of air pressure is higher, but reduces gas
Pressure needs to consume substantial amounts of energy, therefore when two factors of desulfuration efficiency and energy consumption are taken into account, the embodiment of the present invention selects air lift
Pressure is 200kpa-350kpa.
Specifically, the tower diameter of the stripping tower 1 is 2-3m.The treating capacity determination of tower diameter Main Basiss sulfur-bearing oil field extracted water 3,
The restriction of traffic condition is considered simultaneously, and it is that 2-3 rice is appropriate that the tower diameter of stripping tower is selected.
Specifically, the stripping tower 1 is using the combined trapezoid spray tray suitable for oil-polluted water.Combined trapezoid spray tray has logical
The advantages of measuring big, separative efficiency height, anti-clogging, it is adaptable to extensive oil-polluted water removing hydrogen sulfide.
Embodiment 1
Referring to Fig. 1, the embodiment of the present invention removes sulfur crude with the natural gas in oil vapor treatment station as source of the gas using air- extraction
The hydrogen sulfide of field recovered water.
Gas stripping process flow process is as follows：First analysis temperature is the content of various ion in 65 DEG C of sulfur-bearing oil field extracted water 3
With the content of hydrogen sulfide, wherein salt content 190,000ppm, C 1 content 130,000ppm, hydrogen sulfide content 550ppm, sulfur crude
Sulfur content is high in field recovered water 3, and corrosivity is big；Acid solution 7 is added in the sulfur-bearing oil field extracted water 3 of pH value 6.5, its pH is adjusted
Value, when the pH value of sulfur-bearing oil field extracted water is 3, by sulfur-bearing oil field extracted water 3 according to the flow of 200T/h from the top of stripping tower 1
Portion injects and makes it flow downward.Meanwhile, 40 DEG C of natural gas 4 is injected simultaneously with the flow of 1600Nm3/h from the bottom of stripping tower 1
Flow up, stripping tower 1 is selected in dual phase steel material, tower diameter 2.0m, tower height 12m, tower and installs 12 blocks of column plates 2, air lift pressure
300kpa.Sulfur-bearing oil field extracted water 3 during flowing downward with the natural gas 4 that flows up stripping tower 1 the superinverse of column plate 2
Stream contact, by gas liquid separating function, respectively obtains sulfur-containing gas 5 and desulfurization oil field extracted water 10, the sulfur-containing gas 5
Discharge from the tower top of stripping tower 1, into sulfur-containing gas processing unit the process of next step is carried out, the hydrogen sulfide of removing carries out comprehensive
Close and utilize, beneficial to environmental protection；Desulfurization oil field extracted water 6 is discharged from the bottom of towe of stripping tower 1, according to GB26983-2011-T《Crude oil sulphur
Change the measure of hydrogen, methyl mercaptan and ethanethio》The regulation of standard, using sulfuration in chromatography detection desulfurization oil field extracted water 6
The content of hydrogen is 18ppm；Finally, after the pH value of desulfurization oil field extracted water 6 being adjusted to into 7 with alkali lye 8, to desulfurization oil field extracted water
6 are for further processing, until it reaches re-injection or discharge standard.
Embodiment 2
Referring to Fig. 1, the embodiment of the present invention removes sulfur crude with the natural gas in oil vapor treatment station as source of the gas using air- extraction
The hydrogen sulfide of field recovered water.
Gas stripping process flow process is as follows：First analysis temperature is the content of various ion in 75 DEG C of sulfur-bearing oil field extracted water 3
With the content of hydrogen sulfide, wherein salt content 100,000ppm, C 1 content 60,000ppm, hydrogen sulfide content 150ppm, sulfur crude
Sulfur content is higher in field recovered water 3, and corrosivity is larger；Acid solution 7 is added in the sulfur-bearing oil field extracted water 3 of pH value 6, its pH is adjusted
Value, when the pH value of sulfur-bearing oil field extracted water is 3.5, by sulfur-bearing oil field extracted water 3 according to the flow of 500T/h from stripping tower 1
Top is injected and makes it flow downward.Meanwhile, 40 DEG C of natural gas 4 is injected with the flow of 2500Nm3/h from the bottom of stripping tower 1
And flow up, stripping tower 1 is selected in dual phase steel material, tower diameter 2.4m, tower height 16m, tower and installs 15 blocks of column plates 2, air lift pressure
350kpa.Sulfur-bearing oil field extracted water 3 during flowing downward with the natural gas 4 that flows up stripping tower 1 the superinverse of column plate 2
Stream contact, by gas liquid separating function, respectively obtains sulfur-containing gas 5 and desulfurization oil field extracted water 10, the sulfur-containing gas 5
Discharge from the tower top of stripping tower 1, into sulfur-containing gas processing unit the process of next step is carried out, the hydrogen sulfide of removing carries out comprehensive
Close and utilize, beneficial to environmental protection；Desulfurization oil field extracted water 6 is discharged from the bottom of towe of stripping tower 1, according to GB26983-2011-T《Crude oil sulphur
Change the measure of hydrogen, methyl mercaptan and ethanethio》The regulation of standard, using sulfuration in chromatography detection desulfurization oil field extracted water 6
The content of hydrogen is 13ppm；Finally, after the pH value of desulfurization oil field extracted water 6 being adjusted to into 8 with alkali lye 8, to desulfurization oil field extracted water
6 are for further processing, until it reaches re-injection or discharge standard.
The embodiments of the present invention are for illustration only, do not represent the quality of embodiment.
The foregoing is only presently preferred embodiments of the present invention, not to limit the present invention, all spirit in the present invention and
Within principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (5)
1. a kind of method that high sulfur-bearing oilfield recovered water removes hydrogen sulfide, it is characterised in that sulphur in the sulfur-bearing oil field extracted water
The content for changing hydrogen is 150ppm-600ppm；
Methods described, using air- extraction desulfurization, is specifically operated as follows with natural gas as source of the gas：
Content, the salt content of chlorion in analysis sulfur-bearing oil field extracted water, and then determine sulfuration in the sulfur-bearing oil field extracted water
The content of hydrogen；
The natural gas and the sulfur-bearing oil field extracted water are determined according to the content of hydrogen sulfide in the sulfur-bearing oil field extracted water
Volume ratio；
The pH value for adjusting sulfur-bearing oil field extracted water is 3-4, then will regulate the sulfur-bearing oil field extracted water of pH value from stripping tower
Top is input into and flows downward, and by natural gas is from the bottom input of the stripping tower and flows up, adopts the sulfur-bearing oil field
Water outlet during flowing downward with the natural gas that flows up on the column plate of the stripping tower counter current contacting, by gas-liquid point
From effect, sulfur-containing gas and desulfurization oil field extracted water are obtained, the sulfur-containing gas are discharged from the tower top of the stripping tower, institute
State desulfurization oil field extracted water to discharge from the bottom of towe of gas tower；
The volume ratio of the natural gas and the sulfur-bearing oil field extracted water is (3-8)：1；
The temperature of the sulfur-bearing oil field extracted water is 60 DEG C～80 DEG C, and the temperature of the natural gas is 40 DEG C, the natural gas
Flow is 1600Nm3/ h or 2500Nm3/h；
The pressure of the stripping tower is 300kPa-350kPa；
The stripping tower tower diameter is 2-3m.
2. the method for claim 1, it is characterised in that the air- extraction is that single column is pressurizeed stripping process.
3. the method for claim 1, it is characterised in that after the desulfurization oil field extracted water is discharged from the bottom of towe of stripping tower
Its pH value is adjusted to into 7-8 with alkali lye, and into next step processing unit, until it reaches the standard of re-injection or discharge.
4. the method for claim 1, it is characterised in that the sulfur-containing gas are discharged from the tower top of the stripping tower
Afterwards, the process of next step is carried out into sulfur-containing gas processing unit.
5. the method for claim 1, it is characterised in that the stripping tower is using the solid mass-transferring suitable for oil-polluted water
Tower tray.
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| CN105000745B (en) * | 2015-09-02 | 2017-04-05 | 中国石油化工股份有限公司 | A kind of sulfur Gas Fields produced water treatment system |
| CN106335951A (en) * | 2015-11-11 | 2017-01-18 | 宁波工程学院 | Stripping technology for removing hydrogen sulfide from oil extraction sewage |
| CN108219834B (en) * | 2016-12-14 | 2020-07-14 | 中国海洋石油集团有限公司 | Crude oil quality-grading treatment method |
| CN112645478A (en) * | 2019-10-10 | 2021-04-13 | 中国石油化工股份有限公司 | Desulfurization method and system for high-sulfur-content wastewater of oil and gas field |
| CN112053029B (en) * | 2020-07-28 | 2024-03-08 | 中国石油天然气股份有限公司 | Classification and classification method for natural gas field gas production pipeline management |
| CN116199293A (en) * | 2021-11-30 | 2023-06-02 | 中国石油化工股份有限公司 | Reinforced negative pressure gas stripping device and gas stripping method thereof |
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