CN110885142B - Sulfur removal device for oilfield sewage and application - Google Patents
Sulfur removal device for oilfield sewage and application Download PDFInfo
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- CN110885142B CN110885142B CN201811051510.6A CN201811051510A CN110885142B CN 110885142 B CN110885142 B CN 110885142B CN 201811051510 A CN201811051510 A CN 201811051510A CN 110885142 B CN110885142 B CN 110885142B
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- 229910052717 sulfur Inorganic materials 0.000 title claims abstract description 163
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 title claims abstract description 161
- 239000011593 sulfur Substances 0.000 title claims abstract description 160
- 239000010865 sewage Substances 0.000 title claims abstract description 138
- 239000007787 solid Substances 0.000 claims abstract description 105
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 85
- 230000000844 anti-bacterial effect Effects 0.000 claims abstract description 61
- 239000003899 bactericide agent Substances 0.000 claims abstract description 61
- 238000002156 mixing Methods 0.000 claims abstract description 56
- 238000001914 filtration Methods 0.000 claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000000746 purification Methods 0.000 claims abstract description 8
- 239000007788 liquid Substances 0.000 claims description 22
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 21
- 241000894006 Bacteria Species 0.000 claims description 19
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 19
- 230000001276 controlling effect Effects 0.000 claims description 18
- 239000003002 pH adjusting agent Substances 0.000 claims description 13
- 238000004891 communication Methods 0.000 claims description 5
- 238000005238 degreasing Methods 0.000 claims description 5
- 230000002401 inhibitory effect Effects 0.000 claims description 4
- 239000008213 purified water Substances 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 239000002351 wastewater Substances 0.000 claims 5
- 239000005864 Sulphur Substances 0.000 claims 1
- 238000004062 sedimentation Methods 0.000 description 16
- 239000003921 oil Substances 0.000 description 13
- 238000000034 method Methods 0.000 description 12
- 230000008569 process Effects 0.000 description 6
- 239000012535 impurity Substances 0.000 description 5
- 235000011121 sodium hydroxide Nutrition 0.000 description 5
- 239000000243 solution Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 3
- 238000006477 desulfuration reaction Methods 0.000 description 3
- 230000023556 desulfurization Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 230000002378 acidificating effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 102000002322 Egg Proteins Human genes 0.000 description 1
- 108010000912 Egg Proteins Proteins 0.000 description 1
- 241000287828 Gallus gallus Species 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000001651 autotrophic effect Effects 0.000 description 1
- WDIHJSXYQDMJHN-UHFFFAOYSA-L barium chloride Chemical compound [Cl-].[Cl-].[Ba+2] WDIHJSXYQDMJHN-UHFFFAOYSA-L 0.000 description 1
- 229910001626 barium chloride Inorganic materials 0.000 description 1
- 210000003169 central nervous system Anatomy 0.000 description 1
- 230000002498 deadly effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 210000001508 eye Anatomy 0.000 description 1
- 230000000855 fungicidal effect Effects 0.000 description 1
- 239000000417 fungicide Substances 0.000 description 1
- 230000002070 germicidal effect Effects 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- PIJPYDMVFNTHIP-UHFFFAOYSA-L lead sulfate Chemical compound [PbH4+2].[O-]S([O-])(=O)=O PIJPYDMVFNTHIP-UHFFFAOYSA-L 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 210000004681 ovum Anatomy 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/101—Sulfur compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
Abstract
The invention provides a sulfur removal device for oilfield sewage and application thereof, wherein the sulfur removal device comprises a sewage storage unit, a bactericide storage unit, a pH regulator storage unit, a mixing unit, a solid sulfur removal agent storage unit, a filtering unit and a water purification storage unit; the outlet of the sewage storage unit, the outlet of the bactericide storage unit and the outlet of the pH regulator storage unit are respectively communicated with the inlet of the mixing unit, the outlet of the mixing unit is communicated with the inlet of the solid sulfur removal agent storage unit, the outlet of the solid sulfur removal agent storage unit is communicated with the filtering unit, and the outlet of the filtering unit is communicated with the inlet of the water purification storage unit; the bactericide storage unit is used for storing bactericide; the pH regulator storage unit is used for storing the pH regulator. The device can carry out triple sulfur removal to the oil field sewage, and the H is avoided to the greatest extent 2 S is generated.
Description
Technical Field
The invention relates to a sulfur removal device for oilfield sewage and application thereof, and belongs to the technical field of oilfield sewage treatment.
Background
H 2 S is colorless, extremely toxic and acidic gas, and has special odor of ovum gallus Domesticus at low concentration, and is inhaled with small amount and high concentration of H 2 S can be deadly in a short time, and has low concentration of H 2 S has an effect on the eye, respiratory system and central nervous system.
Sewage treated in sewage treatment plant can lead sulfate reducing bacteria to reduce sulfate ions due to long-term sealed anaerobic conditionGeneration of H 2 S, H after equipment corrosion perforation 2 S will leak, from H 2 The death accident caused by S occurs in some cases, and a plurality of cases of death occur in the accident together in some cases. Due to H 2 S is an acute virulent substance, and contains H 2 S, corresponding measures are needed to be taken while strict management and control are carried out so as to ensure the physical health of operators and avoid H 2 The leakage of S affects the human body and the environment.
H in oilfield sewage is started at present in China 2 S is analyzed and researched, and the invention patent application with the application number of CN201010253342.6 is subjected to two-stage aeration and added with autotrophic desulfurization bacteria and aerobic heterotrophic bacteria, so that the content of sulfate reducing bacteria is reduced through the action of oxygen and the biological competition of the aerobic heterotrophic bacteria, and new hydrogen sulfide is avoided. The invention patent application with the application number of CN201510696478.7 determines the adding amount of barium chloride according to the concentration of sulfate ions and removes the sulfate ions. The first method can corrode the desulfurization device, the second method can produce barium sulfate precipitation, difficulty is brought to sewage treatment, the sulfur removal measure is single, and the effect is not obvious.
Disclosure of Invention
The invention provides a sulfur removal device for oilfield sewage and application thereof, which are convenient to operate, can perform triple sulfur removal on oilfield sewage, ensure that the sulfur content in oilfield sewage is effectively reduced, and avoid H to the greatest extent 2 S is generated, thereby ensuring the physical health of operators and avoiding H 2 S leakage affects the human body and the environment, and does not corrode the device.
The invention provides a sulfur removal device for oilfield sewage, which comprises a sewage storage unit, a bactericide storage unit, a pH regulator storage unit, a mixing unit, a solid sulfur removal agent storage unit, a filtering unit and a water purification storage unit;
the outlet of the sewage storage unit, the outlet of the bactericide storage unit and the outlet of the pH regulator storage unit are respectively communicated with the inlet of the mixing unit, the outlet of the mixing unit is communicated with the inlet of the solid sulfur removal agent storage unit, the outlet of the solid sulfur removal agent storage unit is communicated with the filtering unit, and the outlet of the filtering unit is communicated with the inlet of the water purification storage unit;
the bactericide storage unit is used for storing bactericide which is used for inhibiting sulfate reducing bacteria in the oilfield sewage;
the pH regulator storage unit is used for storing a pH regulator, and the pH regulator is used for regulating the pH value of the oilfield sewage to 9-11.
The sulfur removal device for oilfield sewage, as described above, further comprises a sedimentation unit, wherein the inlet of the sedimentation unit is communicated with the outlet of the mixing unit, and the outlet of the sedimentation unit is communicated with the inlet of the solid sulfur removal agent storage unit.
The sulfur removal device for oilfield sewage, as described above, further comprises a deoiling unit, wherein the inlet of the deoiling unit is communicated with the outlet of the solid sulfur removal agent storage unit, and the outlet of the deoiling unit is communicated with the inlet of the filtering unit.
The sulfur removal device for oilfield sewage further comprises a first control unit, a second control unit, a third control unit and a fourth control unit;
the first control unit is used for controlling the outlet of the sewage storage unit, the second control unit is used for controlling the outlet of the bactericide storage unit, the third control unit is used for controlling the outlet of the pH regulator storage unit, and the fourth control unit is used for controlling the outlet of the solid sulfur removal agent storage unit.
The sulfur removal device for oilfield sewage, as described above, further comprises a first driving unit, a second driving unit, a third driving unit and a fourth driving unit;
the first driving unit is arranged between the first control unit and the mixing unit, the second driving unit is arranged between the second control unit and the mixing unit, the third driving unit is arranged between the third control unit and the mixing unit, and the fourth driving unit is arranged between the fourth control unit and the oil removing unit.
The sulfur removal device for oilfield sewage, as described above, wherein the mixing unit has a plurality of mesh structures therein, and the plurality of mesh structures are arranged at equal intervals in a direction from an inlet to an outlet of the mixing unit.
The sulfur removal device for oilfield sewage, wherein the solid sulfur removal agent storage unit is internally provided with a plurality of solid sulfur removal agent storage pipelines and a plurality of liquid flow pipelines, the solid sulfur removal agent storage pipelines and the liquid flow pipelines are arranged at intervals, and the solid sulfur removal agent storage pipelines and the liquid flow pipelines are provided with net-shaped pipe walls;
the inlet of the solid sulfur removal agent storage pipeline and the inlet of the liquid flow pipeline are communicated with the inlet of the solid sulfur removal agent storage unit, and the outlet of the solid sulfur removal agent storage pipeline and the outlet of the liquid flow pipeline are communicated with the outlet of the solid sulfur removal agent storage unit.
The sulfur removal device for oilfield sewage, wherein the sewage storage unit is a zero tank.
The sulfur removal device for oilfield sewage, wherein the pH regulator is sodium hydroxide aqueous solution.
The invention also provides an application of the sulfur removal device for the oilfield sewage in treating oilfield sewage.
The implementation of the invention has at least the following advantages:
1. the sulfur removal device can remove sulfate reducing bacteria in oilfield sewage on a large scale through the bactericide in the bactericide storage unit, and the sulfate reducing bacteria are prevented from reducing sulfate ions into H in an anaerobic environment 2 S, inhibit H 2 S, generating;
2. the sulfur removal device can adjust the pH value of the oilfield sewage through the pH regulator in the pH regulator storage unit, so that the HS in the oilfield sewage - 、S 2- Ions not being H 2 S form exists to reduce H 2 S content;
3. the sulfur removal device can also effectively remove sulfur-containing substances in oilfield sewage through the solid sulfur remover in the solid sulfur remover storage unit;
4. the sulfur removal device can remove impurities such as crude oil and suspended solids of sewage while removing sulfur, and ensure water quality indexes.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it will be obvious that the drawings in the following description are some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.
FIG. 1 is a schematic view of a sulfur removal apparatus for oilfield sewage according to one embodiment of the present invention;
FIG. 2 is a schematic view of a second embodiment of the sulfur removal device for oilfield sewage;
FIG. 3 is a schematic view of a third embodiment of the sulfur removal apparatus for oilfield sewage according to the present invention;
FIG. 4 is a schematic view of a sulfur removal apparatus for oilfield sewage according to a fourth embodiment of the present invention;
fig. 5 is a schematic structural view of a fifth embodiment of the sulfur removal device for oilfield sewage.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions in the embodiments of the present invention will be clearly and completely described in the following in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present invention and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention. In the description of the present invention, the meaning of "a plurality" is two or more, unless specifically stated otherwise.
The terms "first," "second," "third," "fourth" and the like in the description and in the claims of this application and in the above-described figures, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be capable of operation in sequences other than those illustrated or described herein, for example. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In the description of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be fixedly connected, or may be connected via an intermediary, or may be in communication with each other within two elements or in an interaction relationship between two elements, for example. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
FIG. 1 is a schematic view of a sulfur removal unit for oilfield sewage according to an embodiment of the present invention. As shown in fig. 1, the sulfur removal device for oilfield sewage of the present embodiment includes a sewage storage unit 1, a bactericide storage unit 2, a pH adjuster storage unit 3, a mixing unit 4, a solid sulfur removal agent storage unit 5, a filtering unit 6, and a purified water storage unit 7;
wherein, the outlet of the sewage storage unit 1, the outlet of the bactericide storage unit 2 and the outlet of the pH regulator storage unit 3 are respectively communicated with the inlet of the mixing unit 4, the outlet of the mixing unit 4 is communicated with the inlet of the solid sulfur removal agent storage unit 5, the outlet of the solid sulfur removal agent storage unit 5 is communicated with the filtering unit 6, and the outlet of the filtering unit 6 is communicated with the inlet of the water purification storage unit 7;
the bactericide storage unit 2 is used for storing bactericide which is used for inhibiting sulfate reducing bacteria in the oilfield sewage;
the pH regulator storage unit 3 is used for storing a pH regulator for regulating the pH value of the oilfield sewage to 9-11.
Specifically, the sewage storage unit 1 is used for storing oilfield sewage to be treated, and may be a zero tank; the bactericide storage unit 2 is used for storing bactericide for inhibiting sulfate reducing bacteria in oilfield sewage; the pH regulator storage unit 3 is used for storing a pH regulator for regulating the pH value of the oilfield sewage; the mixing unit 4 is used for mixing the oilfield sewage, the bactericide and the pH regulator from the sewage storage unit 1, the bactericide storage unit 2 and the pH regulator storage unit 3 respectively; the solid sulfur remover storage unit 5 is used for storing a solid sulfur remover for further reducing the sulfur content of the oilfield sewage; the filtering unit 6 is used for filtering solid impurities in the oilfield sewage; the clean water storage unit 7 is used for storing treated oilfield sewage.
The plurality of functional units in the present embodiment are generally connected by pipes when each of the functional units is connected. Specifically, the sulfur removal device of the present embodiment may include three pipes, that is, a main pipe, a first pipe, and a second pipe, respectively. Wherein, the main pipe communicates water storage unit, mixing unit 4, solid sulfur removal agent storage unit 5, filtration unit 6 and water purification storage unit 7 in proper order, and first pipeline is used for storing unit 2 with the main pipe intercommunication of germicide, and the second pipeline is used for storing unit 3 with the main pipe intercommunication of pH regulator.
When the sulfur removal device is used for treating oilfield sewage, the oilfield sewage in the sewage storage unit 1 enters the main pipeline through the outlet of the sewage storage unit 1, the bactericide in the bactericide storage unit 2 enters the main pipeline through the first pipeline, and the pH regulator in the pH regulator storage unit 3 enters the main pipeline through the second pipeline.
After the oilfield sewage, the bactericide and the pH adjuster are joined in the main pipe, they enter the mixing unit 4 through the inlet of the mixing unit 4 and complete mixing in the mixing unit 4. In the mixing unit 4, the bactericide and the pH regulator can chemically react with the oilfield sewage, wherein the bactericide can inhibit sulfate reducing bacteria in the oilfield sewage, and the sulfate reducing bacteria are prevented from reducing sulfate in the oilfield sewage into hydrogen sulfide; the pH regulator can regulate the pH value in the oilfield sewage to 9-11, so as to avoid HS in the oilfield sewage - 、S 2- The ions are converted to hydrogen sulfide.
In order to enable the oilfield sewage, the bactericide and the pH regulator to be fully mixed in the mixing unit 4 to generate the chemical reaction, in one embodiment, a stirring device can be installed in the mixing unit 4, and the full mixing of the oilfield sewage, the bactericide and the pH regulator can be ensured by uniform stirring of the stirring device; in another embodiment, a plurality of mesh structures may be disposed inside the mixing unit 4, and the plurality of mesh structures are arranged at equal intervals in the inlet-to-outlet direction of the mixing unit 4, that is, the plane of the mesh structures is parallel to the cross section of the mixing unit 4. That is, when the mixing unit 4 is provided with a plurality of the above-mentioned net structures, the oilfield sewage, the bactericide, and the pH adjuster pass through the plurality of net structures when flowing from the inlet of the mixing unit 4 to the outlet of the mixing unit 4, and the three can be fully mixed to the maximum extent in the passing process. It is understood that the pore diameter of the mesh can be reduced as much as possible on the premise of ensuring that the bactericide and the pH adjustor can pass through the mesh of the mesh structure, thereby ensuring the full mixing of the three. In addition, the net structure can be made of materials with corrosion resistance.
Before treating oilfield sewage, the amounts of bactericide and pH adjuster used need to be calculated in order to deliver the bactericide and pH adjuster.
Specifically, when calculating the usage amount of the bactericide, the method comprises the following steps:
s101: detecting the concentration of sulfate reducing bacteria in oilfield sewage according to the oil and gas industry standard SY/T5329-2012, clastic rock oil reservoir water injection quality index and analysis method;
s102: and determining the dosage of the bactericide according to the concentration of sulfate reducing bacteria in the oilfield sewage.
The specific determination method is as follows:
a. the concentration of sulfate reducing bacteria is less than 10 2 The dosage of the bactericide is 30mg/L;
b.10 2 the concentration of sulfate reducing bacteria per mL is less than or equal to 10 4 The dosage of the bactericide is 100mg/L;
c. the concentration of sulfate reducing bacteria is more than or equal to 10 4 The dosage of the bactericide is 200mg/L;
s103: and calculating the total addition amount of the bactericide according to the amount to be treated of the oilfield sewage.
If additional needs exist, specific fungicide types, concentrations and compatibility may be preferred for comparison.
When the pH regulator is selected, the pH regulator commonly used in sewage treatment system comprises caustic soda (NaOH), KOH, caO and other pH-adjustable agents, and part of oil fields adopt acidic substances such as HCl and H 2 SO 4 Etc. as pH adjusting agents. If the sewage contains H 2 S (or HS) - 、S 2- ) The invention preferably uses NaOH aqueous solution as pH regulator, which can adjust pH value of water and has the function of sinking assistance.
In the specific application process, naOH compatibility experiments are also required to be carried out on the optimized bactericide, so that the optimal bactericide type, concentration and NaOH use concentration are determined.
When the oilfield sewage is reacted with the bactericide and the pH regulator in the mixing unit 4, the oilfield sewage treated by the bactericide and the pH regulator is output from the outlet of the mixing unit 4 and enters the solid sulfur removal unit from the inlet of the solid sulfur removal storage unit 5 through the main pipeline. Because the solid sulfur remover unit is filled with the solid sulfur remover, the oilfield sewage entering the solid sulfur remover unit can react with the solid sulfur remover to further remove sulfur-containing substances in the oilfield sewage.
In order to improve the sulfur removal efficiency of the solid sulfur removal agent, the present invention makes a special design for the solid sulfur removal agent storage unit 5.
The solid sulfur removal agent storage unit 5 is internally provided with a plurality of solid sulfur removal agent storage pipelines and a plurality of liquid flow pipelines, the solid sulfur removal agent storage pipelines and the liquid flow pipelines are arranged at intervals, and the solid sulfur removal agent storage pipelines and the liquid flow pipelines are provided with net-shaped pipe walls; wherein, the inlet of the solid sulfur removal agent storage pipeline and the inlet of the liquid flow pipeline are communicated with the inlet of the solid sulfur removal agent storage unit 5, and the outlet of the solid sulfur removal agent storage pipeline and the outlet of the liquid flow pipeline are communicated with the outlet of the solid sulfur removal agent storage unit 5. It will be appreciated that the solid sulfur removal agent storage conduit is filled with a solid sulfur removal agent.
When the oilfield sewage enters the solid sulfur removal agent storage unit 5 through the inlet of the solid sulfur removal agent storage unit 5, the oilfield sewage enters the solid sulfur removal agent storage pipeline and the liquid flow pipeline respectively, the oilfield sewage entering the solid sulfur removal agent storage pipeline directly contacts and reacts with the solid sulfur removal agent, and a part of oilfield sewage enters the liquid flow pipeline through the reticular pipe wall of the solid sulfur removal agent storage pipeline in the contact process; the oilfield sewage entering the liquid flow pipeline can contact and react with the solid sulfur removal agent in the solid sulfur removal agent storage pipeline through the net-shaped pipe walls of the solid sulfur removal agent storage pipeline and the liquid flow pipeline, and also can flow into the solid sulfur removal agent storage pipeline through the net-shaped pipe walls of the solid sulfur removal agent storage pipeline and the liquid flow pipeline to directly contact and react with the solid sulfur removal agent. Therefore, after the oilfield sewage enters the solid sulfur removal agent storage unit 5, the oilfield sewage is repeatedly exchanged in the solid sulfur removal agent storage pipeline and the liquid flow pipeline, so that the sulfur removal effect of the solid sulfur removal agent is effectively improved.
When the solid sulfur removal agent storage pipeline is arranged, the mesh aperture of the net-shaped closing of the solid sulfur removal agent storage pipeline is smaller than the diameter of the solid sulfur removal agent particles, so that the solid sulfur removal agent in the solid sulfur removal agent storage pipeline is prevented from being dispersed under the pressure of oilfield sewage.
After the oilfield sewage is output from the outlet of the solid sulfur removal agent storage unit 5, the oilfield sewage enters the filtering unit 6 from the inlet of the filtering unit 6 through the main pipeline, and the oilfield sewage is subjected to solid-liquid separation in the filtering unit 6 through the filter screen in the filtering unit 6. The oilfield sewage treated by the filtering unit 6 is output from the outlet of the filtering unit 6, enters the purified water storage unit 7 from the inlet of the purified water storage unit 7 through the main pipeline, and the desulfurization and purification treatment of the oilfield sewage are completed.
The oilfield sewage sulfur removal device of the embodiment is an oilfield sewage treatment device based on triple sulfur removal measures, and sulfate ions in oilfield sewage can be effectively inhibited from being reduced into H in anaerobic environment by sulfate reducing bacteria through bactericides 2 S, S; HS can also be brought about by a pH regulator - 、S 2- Ions not being H 2 S form exists to reduce H 2 S content; even if the oilfield sewage contains H 2 S can also be removed by a final solid sulfur removal agent, and the triple sulfur removal measures can ensure effective sulfur removal through synergistic effect.
Fig. 2 is a schematic structural diagram of a second embodiment of the sulfur removal device for oilfield sewage. As shown in fig. 2, on the basis of embodiment 1, the sulfur removal apparatus of this embodiment further includes a sedimentation unit 8, an inlet of the sedimentation unit 8 is communicated with an outlet of the mixing unit 4, and an outlet of the sedimentation unit 8 is communicated with an inlet of the solid sulfur removal agent storage unit 5.
Since in the mixing unit 4, the oilfield sewage is subjected to the action of the bactericide and the pH regulator, floc is generated in the whole system, and the oilfield sewage itself is also provided with suspended matters, in order to relieve the pressure of the subsequent filtering unit 6 and avoid the pollution of the floc and suspended matters to the solid sulfur removal agent in the solid sulfur removal agent storage unit 5, the embodiment is provided with the solid sedimentation unit 8 at the outlet of the mixing unit 4, and the floc and suspended matters from the mixing unit 4 can be subjected to large-area sedimentation separation by the solid sedimentation unit 8, so that the solid impurities in the oilfield sewage entering the solid sulfur removal agent storage unit 5 can be ensured to be removed in advance.
In general, the sedimentation unit 8 is often a sedimentation tank, and it is conceivable that the sedimentation tank should have a drain at the bottom for discharging solid impurities settled at the bottom of the tank, in addition to an outlet and an inlet for receiving and outputting oilfield sewage.
Fig. 3 is a schematic structural view of a third embodiment of the sulfur removal device for oilfield sewage. As shown in fig. 3, on the basis of embodiment 2, the sulfur removal apparatus of this embodiment further includes a degreasing unit 9, an inlet of the degreasing unit 9 is communicated with an outlet of the solid sulfur removal agent storage unit 5, and an outlet of the degreasing unit 9 is communicated with an inlet of the filtering unit 6.
In order to further purify the oilfield sewage, the present embodiment is further provided with an oil removal unit 9 for removing grease from the oilfield sewage. In general, the oil removing unit 9 may be specifically an efficient oil remover, and the efficient oil remover uses oil removing resin as a filtering medium, and uses lipophilic groups in the resin to collect and adsorb emulsified oil and oil droplets in oilfield sewage, so as to achieve oil-water separation.
On the basis of the embodiment 1, the setting of the sedimentation unit 8 and the oil removal unit 9 ensures that the sulfur removal device of the invention not only can effectively remove sulfur, but also can remove crude oil and solid impurities in oilfield sewage, thereby ensuring the index of water quality.
Fig. 4 is a schematic structural view of a fourth embodiment of the sulfur removal device for oilfield sewage. As shown in fig. 4, on the basis of embodiment 3, the sulfur removal apparatus of the present embodiment further includes a first control unit a, a second control unit B, a third control unit C, and a fourth control unit D;
wherein, the first control unit A is used for controlling the outlet of the sewage storage unit 1, the second control unit B is used for controlling the outlet of the bactericide storage unit 2, the third control unit C is used for controlling the outlet of the pH regulator storage unit 3, and the fourth control unit D is used for controlling the outlet of the solid sulfur removal agent storage unit 5.
In order to control each unit in a program in the sulfur removal process and to control the working time of each unit conveniently, a first control unit A can be arranged at the outlet of the sewage storage unit 1 and used for controlling the opening and closing states of the outlet of the sewage storage unit 1; a second control unit B is arranged at the outlet of the bactericide storage unit 2 and is used for controlling the opening and closing states of the outlet of the bactericide storage unit 2; a third control unit C is arranged at the outlet of the pH regulator storage unit 3 and is used for controlling the open-close state of the outlet of the pH regulator storage unit 3; a third control unit C is provided at the outlet of the solid sulfur removal agent storage unit 5 for controlling the open-closed state of the outlet of the solid sulfur removal agent storage unit 5.
Before oilfield sewage, bactericide, and pH adjuster are added to the sewage storage unit 1, the bactericide storage unit 2, and the pH adjuster storage unit 3, respectively, the outlets of the sewage storage unit 1, the bactericide storage unit 2, the pH adjuster storage unit 3, and the solid sulfur removal agent storage unit 5 may be closed by the first control unit a, the second control unit B, the third control unit C, and the fourth control unit D. When the addition is completed, the outlets of the sewage storage unit 1, the bactericide storage unit 2 and the pH regulator storage unit 3 can be opened by controlling the first control unit A, the second control unit B and the third control unit C, so that the oilfield sewage, the bactericide and the pH regulator enter the mixing unit 4. When the oilfield sewage enters the solid sulfur removal agent storage unit 5, the time of the oilfield sewage in the solid sulfur removal agent storage unit 5 can be properly controlled, and when the reaction of the oilfield sewage and the solid sulfur removal agent is finished, the outlet of the solid sulfur removal agent storage unit 5 can be opened by controlling the fourth control unit D.
In particular, the first control unit a may be arranged on a main pipe, the second control unit B on the second pipe, the third control unit C on the third pipe and the fourth control unit D on the main pipe.
The present invention is not particularly limited to the specific form of the first control unit a, the second control unit B, the third control unit C, and the fourth control unit D, and may be a manual valve or an electric valve controlled by a circuit.
Fig. 5 is a schematic structural view of a fifth embodiment of the sulfur removal device for oilfield sewage. As shown in fig. 5, the sulfur removal apparatus of the present embodiment further includes, on the basis of embodiment 4, a first driving unit a, a second driving unit b, a third driving unit c, and a fourth driving unit d;
the first driving unit a is disposed between the first control unit a and the mixing unit 4, the second driving unit B is disposed between the second control unit B and the mixing unit 4, the third driving unit C is disposed between the third control unit C and the mixing unit 4, and the fourth driving unit D is disposed between the fourth control unit D and the degreasing unit 9.
Specifically, the first driving unit a is used for driving the flow of oilfield sewage to the mixing unit 4, the second driving unit b is used for driving the flow of bactericide to the mixing unit 4, the third driving unit c is used for driving the flow of pH regulator to the mixing unit 4, and the fourth driving unit d is used for driving the output of oilfield sewage in the solid sulfur removal agent storage unit 5.
The present invention is not limited to the specific embodiments of the first driving unit a, the second driving unit b, the third driving unit c, and the fourth driving unit d, and may be a driving pump.
The invention also provides an application of the sulfur removal device for the oilfield sewage in treating oilfield sewage.
Specifically, after the types and amounts of the bactericide, the pH adjuster, and the solid sulfur remover are determined, the bactericide, the pH adjuster, and the solid sulfur remover are added to the bactericide storage unit 2, the pH adjuster storage unit 3, and the solid sulfur remover storage unit 5, respectively. And then opening outlets of the sewage storage unit 1, the bactericide storage unit 2 and the pH regulator storage unit 3 to enable the sewage storage unit 1, the bactericide storage unit 2 and the pH regulator storage unit 3 to be fully mixed in the mixing unit 4, and then entering the sedimentation unit 8 to finish solid sedimentation. After the sedimentation is finished, the oilfield sewage enters a clean water storage unit 7 through a flowing solid sulfur removal agent storage unit 5, an oil removal unit 9 and a filtering unit 6.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (9)
1. The sulfur removal device for the oilfield sewage is characterized by comprising a sewage storage unit, a bactericide storage unit, a pH regulator storage unit, a mixing unit, a solid sulfur removal agent storage unit, a filtering unit and a purified water storage unit;
the outlet of the sewage storage unit, the outlet of the bactericide storage unit and the outlet of the pH regulator storage unit are respectively communicated with the inlet of the mixing unit, the outlet of the mixing unit is communicated with the inlet of the solid sulfur removal agent storage unit, the outlet of the solid sulfur removal agent storage unit is communicated with the filtering unit, and the outlet of the filtering unit is communicated with the inlet of the water purification storage unit;
the bactericide storage unit is used for storing bactericide which is used for inhibiting sulfate reducing bacteria in the oilfield sewage;
the pH regulator storage unit is used for storing a pH regulator, and the pH regulator is used for regulating the pH value of the oilfield sewage to 9-11;
the solid sulfur removal agent storage unit is internally provided with a plurality of solid sulfur removal agent storage pipelines and a plurality of liquid flow pipelines, the solid sulfur removal agent storage pipelines and the liquid flow pipelines are arranged at intervals, and the solid sulfur removal agent storage pipelines and the liquid flow pipelines are provided with net-shaped pipe walls;
the inlet of the solid sulfur removal agent storage pipeline and the inlet of the liquid flow pipeline are communicated with the inlet of the solid sulfur removal agent storage unit, and the outlet of the solid sulfur removal agent storage pipeline and the outlet of the liquid flow pipeline are communicated with the outlet of the solid sulfur removal agent storage unit.
2. The oilfield wastewater sulfur removal device of claim 1, further comprising a settling unit having an inlet in communication with the outlet of the mixing unit and an outlet in communication with the inlet of the solid sulfur removal agent storage unit.
3. The oilfield wastewater sulfur removal device of claim 2, further comprising a degreasing unit having an inlet in communication with the outlet of the solid sulfur removal agent storage unit and an outlet in communication with the inlet of the filtration unit.
4. The oilfield sewage sulfur removal device of claim 3, further comprising a first control unit, a second control unit, a third control unit, and a fourth control unit;
the first control unit is used for controlling the outlet of the sewage storage unit, the second control unit is used for controlling the outlet of the bactericide storage unit, the third control unit is used for controlling the outlet of the pH regulator storage unit, and the fourth control unit is used for controlling the outlet of the solid sulfur removal agent storage unit.
5. The oilfield sewage sulfur removal device of claim 4, further comprising a first drive unit, a second drive unit, a third drive unit, and a fourth drive unit;
the first driving unit is arranged between the first control unit and the mixing unit, the second driving unit is arranged between the second control unit and the mixing unit, the third driving unit is arranged between the third control unit and the mixing unit, and the fourth driving unit is arranged between the fourth control unit and the oil removing unit.
6. The apparatus for removing sulfur from oilfield sewage of any one of claims 1-5, wherein the mixing unit has a plurality of mesh structures therein, the plurality of mesh structures being equidistantly arranged in a direction from an inlet to an outlet of the mixing unit.
7. The oilfield wastewater sulfur removal apparatus of claim 1, wherein the wastewater storage unit is a zero tank.
8. The oilfield wastewater sulfur removal device of claim 1, wherein the pH adjuster is an aqueous sodium hydroxide solution.
9. Use of a sulphur removal unit for oilfield sewage according to any one of claims 1 to 8 for the treatment of oilfield sewage.
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| CN201811051510.6A CN110885142B (en) | 2018-09-10 | 2018-09-10 | Sulfur removal device for oilfield sewage and application |
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| CN101172726A (en) * | 2007-11-08 | 2008-05-07 | 长庆石油勘探局 | Method and technological process for treating sewage of oil recovery |
| CN105831551A (en) * | 2016-04-06 | 2016-08-10 | 俞祖勋 | Liquid food sterilizing and disinfecting method and apparatus thereof |
| CN206927632U (en) * | 2017-05-31 | 2018-01-26 | 江苏海岳环境工程有限公司 | A kind of coagulation mixed reactor |
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