CA3005192A1 - Standardized oilfield water treatment device and process using physical method - Google Patents
Standardized oilfield water treatment device and process using physical method Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 35
- 230000008569 process Effects 0.000 title claims abstract description 34
- 239000002332 oil field water Substances 0.000 title claims description 32
- 238000000053 physical method Methods 0.000 title claims description 31
- 238000012545 processing Methods 0.000 claims abstract description 323
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 286
- 239000010802 sludge Substances 0.000 claims abstract description 50
- 238000005498 polishing Methods 0.000 claims abstract description 47
- 239000002002 slurry Substances 0.000 claims abstract description 45
- 238000000926 separation method Methods 0.000 claims abstract description 27
- 238000004065 wastewater treatment Methods 0.000 claims abstract description 23
- 238000007711 solidification Methods 0.000 claims abstract description 21
- 230000008023 solidification Effects 0.000 claims abstract description 21
- 238000001914 filtration Methods 0.000 claims description 60
- 238000005188 flotation Methods 0.000 claims description 54
- 230000007797 corrosion Effects 0.000 claims description 43
- 238000005260 corrosion Methods 0.000 claims description 43
- 238000006392 deoxygenation reaction Methods 0.000 claims description 42
- 230000000116 mitigating effect Effects 0.000 claims description 42
- 230000001954 sterilising effect Effects 0.000 claims description 42
- 238000004659 sterilization and disinfection Methods 0.000 claims description 42
- 239000000463 material Substances 0.000 claims description 41
- 239000002245 particle Substances 0.000 claims description 31
- 239000007788 liquid Substances 0.000 claims description 26
- 238000001179 sorption measurement Methods 0.000 claims description 26
- 238000005374 membrane filtration Methods 0.000 claims description 23
- 239000011324 bead Substances 0.000 claims description 18
- 238000004581 coalescence Methods 0.000 claims description 16
- 238000000746 purification Methods 0.000 claims description 15
- 238000004062 sedimentation Methods 0.000 claims description 15
- 238000011010 flushing procedure Methods 0.000 claims description 13
- 230000009467 reduction Effects 0.000 claims description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 12
- 239000000084 colloidal system Substances 0.000 claims description 12
- 238000004042 decolorization Methods 0.000 claims description 12
- 238000005868 electrolysis reaction Methods 0.000 claims description 10
- 239000000945 filler Substances 0.000 claims description 9
- 239000012528 membrane Substances 0.000 claims description 7
- 230000002906 microbiologic effect Effects 0.000 claims description 7
- 230000002745 absorbent Effects 0.000 claims description 6
- 239000002250 absorbent Substances 0.000 claims description 6
- 238000009298 carbon filtering Methods 0.000 claims description 6
- 238000005119 centrifugation Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 6
- 238000004880 explosion Methods 0.000 claims description 6
- 239000011148 porous material Substances 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 5
- 230000000274 adsorptive effect Effects 0.000 claims description 4
- 230000001112 coagulating effect Effects 0.000 claims description 4
- 239000000356 contaminant Substances 0.000 claims description 4
- 238000011084 recovery Methods 0.000 claims description 4
- 238000012958 reprocessing Methods 0.000 claims description 4
- 230000015556 catabolic process Effects 0.000 claims description 3
- 239000012141 concentrate Substances 0.000 claims description 3
- 238000006731 degradation reaction Methods 0.000 claims description 3
- 230000028161 membrane depolarization Effects 0.000 claims description 3
- 239000005416 organic matter Substances 0.000 claims description 3
- 230000002035 prolonged effect Effects 0.000 claims description 3
- 239000008213 purified water Substances 0.000 claims description 3
- 239000013049 sediment Substances 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- 239000002253 acid Substances 0.000 abstract description 2
- 239000003513 alkali Substances 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 17
- 239000007787 solid Substances 0.000 description 11
- 238000010586 diagram Methods 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000000813 microbial effect Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- 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
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
-
- 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
- C02F1/24—Treatment of water, waste water, or sewage by flotation
-
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- 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
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
-
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
-
- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46176—Galvanic cells
-
- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/465—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electroflotation
-
- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
-
- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/469—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- 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
- C02F2001/007—Processes including a sedimentation step
-
- 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
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- 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
- C02F2303/08—Corrosion inhibition
-
- 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
- C02F2303/16—Regeneration of sorbents, filters
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
Abstract
A wastewater treatment system includes a settling tank, a three-phase separator, a settling basin, a primary lift pump, a multi-function processing water tank, a secondary lift pump, a rough processing unit, a fine processing unit, a polishing unit, an air compressor, an air tank and the pipe valves compatible therewith; the sludge slurry treatment system includes a blowdown tank, a slurry lift pump, an oil mud water separation device, a sludge slurry concentration or solidification device and the pipe valves compatible therewith. The process has strong adaptability to incoming water, short processing flow and desirable airtightness. It is not necessary to rinse and regenerate with acid and alkali solutions. Moreover, all the standards required are met. Dosing is not required during operation. A complete oil mud water separation and sludge concentration or solidification system in the blowdown tank is provided.
Description
STANDARDIZED OILFIELD WATER TREATMENT DEVICE AND PROCESS
USING PHYSICAL METHOD
TECHNICAL FIELD
The disclosure relates to standardized oilfield water treatment devices and processes using physical method, in particular to a standardized oilfield water treatment device and process using physical method.
BACKGROUND ART
Due to the high precision prescribed for injection water quality of the ultra-low permeability oilfield, the highest requirements are up to 5-1-1 standard (i.e., oil content < 5mg/L, suspended solid < lmg/L, median particle size < l[tm).
However, due to the general "three highs" water quality characteristics (i.e., high salinity, high suspended solids and high oil content) in the ultra-low permeability oilfield produced water, the treated water quality has not been able to reach "5-1-1" for many years.
There is a big gap between the effluent water quality and the standard requirements for indicators.
To solve this problem, oilfield water treating workers have conducted "microbial treatment + membrane filtration" method for treatment testing. Since the focus is on the single reduction of oil and suspended solids in water, although it will allow oil content, suspended solids and median particle size to meet standards, the following problems are not solved: high precision prescribed for incoming water quality, long pretreatment process, high content of bacteria in treated water, high dissolved oxygen content in the water, serious fouling and corrosion, difficulty in membrane cleaning and regeneration, vicious cycles of concentrated solution in the water treatment system, large space occupation, environmental pollution by dissolved gas volatilization from open process and high processing costs, and so on.
'
USING PHYSICAL METHOD
TECHNICAL FIELD
The disclosure relates to standardized oilfield water treatment devices and processes using physical method, in particular to a standardized oilfield water treatment device and process using physical method.
BACKGROUND ART
Due to the high precision prescribed for injection water quality of the ultra-low permeability oilfield, the highest requirements are up to 5-1-1 standard (i.e., oil content < 5mg/L, suspended solid < lmg/L, median particle size < l[tm).
However, due to the general "three highs" water quality characteristics (i.e., high salinity, high suspended solids and high oil content) in the ultra-low permeability oilfield produced water, the treated water quality has not been able to reach "5-1-1" for many years.
There is a big gap between the effluent water quality and the standard requirements for indicators.
To solve this problem, oilfield water treating workers have conducted "microbial treatment + membrane filtration" method for treatment testing. Since the focus is on the single reduction of oil and suspended solids in water, although it will allow oil content, suspended solids and median particle size to meet standards, the following problems are not solved: high precision prescribed for incoming water quality, long pretreatment process, high content of bacteria in treated water, high dissolved oxygen content in the water, serious fouling and corrosion, difficulty in membrane cleaning and regeneration, vicious cycles of concentrated solution in the water treatment system, large space occupation, environmental pollution by dissolved gas volatilization from open process and high processing costs, and so on.
'
2 SUMMARY OF THE DISCLOSURE
In order to overcome the deficiencies of the "microbial treatment + membrane filtration" treatment, the disclosure provides a standardized oilfield water treatment device and process using physical method. The device and process have not only strong adaptability to incoming water (indicators for the content of oil and suspended solid can both be relaxed to 1000 mg/L), but also short processing flow and desirable airtightness, so that no gas volatilization and spillage of oil occur during the process.
It is not necessary to rinse and regenerate with acid and alkali solutions any more in order to achieve a convenient management with the disclosure. Moreover, the good quality of treated injection water may reach all the standards required. In addition, the disclosure requires only power up and gas introduction but not dosing during operation (except for the sludge treatment), so the low operation cost can be achieved.
At the same time, a complete oil mud water separation and sludge concentration or solidification system in the blowdown tank is provided to solve the problem of the vicious circle of oil sludge pollutants in the water treatment system.
The following technical schemes may be adopted for the purposes of the disclosure:
1. A standardized oilfield water treatment device and process using physical method includes two parts: a wastewater treatment system and a sludge treatment system, wherein the wastewater treatment system includes a settling tank, a three-phase separator, a settling basin, a primary lift pump, a multi-function processing water tank, a secondary lift pump, a rough processing unit, a fine processing unit, a polishing unit, an air compressor and an air tank; the sludge treatment system includes a blowdown tank, a slurry lift pump, an oil mud water separation device and a sludge slurry concentration or solidification device;
the multi-function processing water tank is used as the first stage of wastewater treatment, wherein the water inlet of the multi-function processing water tank is connected to the water outlet of the settling tank or the three-phase separator, or
In order to overcome the deficiencies of the "microbial treatment + membrane filtration" treatment, the disclosure provides a standardized oilfield water treatment device and process using physical method. The device and process have not only strong adaptability to incoming water (indicators for the content of oil and suspended solid can both be relaxed to 1000 mg/L), but also short processing flow and desirable airtightness, so that no gas volatilization and spillage of oil occur during the process.
It is not necessary to rinse and regenerate with acid and alkali solutions any more in order to achieve a convenient management with the disclosure. Moreover, the good quality of treated injection water may reach all the standards required. In addition, the disclosure requires only power up and gas introduction but not dosing during operation (except for the sludge treatment), so the low operation cost can be achieved.
At the same time, a complete oil mud water separation and sludge concentration or solidification system in the blowdown tank is provided to solve the problem of the vicious circle of oil sludge pollutants in the water treatment system.
The following technical schemes may be adopted for the purposes of the disclosure:
1. A standardized oilfield water treatment device and process using physical method includes two parts: a wastewater treatment system and a sludge treatment system, wherein the wastewater treatment system includes a settling tank, a three-phase separator, a settling basin, a primary lift pump, a multi-function processing water tank, a secondary lift pump, a rough processing unit, a fine processing unit, a polishing unit, an air compressor and an air tank; the sludge treatment system includes a blowdown tank, a slurry lift pump, an oil mud water separation device and a sludge slurry concentration or solidification device;
the multi-function processing water tank is used as the first stage of wastewater treatment, wherein the water inlet of the multi-function processing water tank is connected to the water outlet of the settling tank or the three-phase separator, or
3 connected to the outlet orifice of the primary lift pump of the settling basin; the rough processing unit is used as the second stage of wastewater treatment, wherein the secondary lift pump is provided on the communicating pipe of the water inlet of the rough processing unit and the water outlet of the multi-function processing water tank, and the inlet of the secondary lift pump is connected to the water outlet orifice of the multi-function processing water tank, and the water outlet orifice of the secondary lift pump is connected to the water inlet orifice of the rough processing unit; the fine processing unit is used as the third stage of wastewater treatment, wherein the water inlet orifice of the fine processing unit is connected to the water outlet orifice of the rough processing unit; the polishing unit is used as the fourth stage of wastewater treatment, wherein the water inlet orifice of the polishing unit is connected to the water outlet orifice of the fine processing unit, and the polishing unit is provided with two water outlet orifices, which are respectively connected to the water inlet orifices of the purified water storage tank;
the air compressor is connected to the inlet of the air tank;
the air outlet of the air tank is connected to the water inlet pipes of the multi-function processing water tank, the rough processing unit, the fine processing unit and the polishing unit, and to the backwash water inlet pipes of the rough processing unit and the fine processing unit, respectively;
the multi-function processing water tank, the rough processing unit, the fine processing unit and the polishing unit are set to be used in parallel according to the size of the processing amount;
the oil mud water separation device in the sludge slurry treatment system is used as the first stage, and the sludge slurry concentration or solidification device is used as the second stage;
the air compressor is connected to the inlet of the air tank;
the air outlet of the air tank is connected to the water inlet pipes of the multi-function processing water tank, the rough processing unit, the fine processing unit and the polishing unit, and to the backwash water inlet pipes of the rough processing unit and the fine processing unit, respectively;
the multi-function processing water tank, the rough processing unit, the fine processing unit and the polishing unit are set to be used in parallel according to the size of the processing amount;
the oil mud water separation device in the sludge slurry treatment system is used as the first stage, and the sludge slurry concentration or solidification device is used as the second stage;
4 the inlet of the blowdown tank is connected to the discharge orifices of the multi-function processing water tank, the rough processing unit, the fine processing unit and the polishing unit; the outlet of the blowdown tank is connected to the liquid inlet orifice of the oil mud water separation device via the slurry lift pump; the water outlet orifice of the oil mud water separation device is connected to the inlet orifice of the multi-function processing water tank; the discharge orifice of the oil mud water separation device is connected to the feed pipe of the sludge slurry concentration or solidification device.
2. The standardized oilfield water treatment device using physical method described above, wherein an in-pool vortex and air-flotation deoiling processing unit is provided on a small bucket body at the beginning of the liquid inlet in the multi-function processing water tank; an electro-adsorption processing unit is provided in the vortex and air-flotation deoiling processing unit; an electro-flotation processing unit is provided on four outer sides of the vortex and air-flotation deoiling processing unit; a micro-electrolysis processing unit is provided on the left side of the small bucket body; a microbiological and biochemical processing unit is provided on the right side of the large bucket body; a sedimentation purification processing unit is provided on the left side of the large bucket body, and an in-pool primary electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing unit is provided on the three walls of the tank body in the lower part inside the sedimentation purification processing unit.
3. The standardized oilfield water treatment device using physical method described above, wherein the internal structure of the rough processing unit is the same as that of the fine processing unit, and shares a set of mixed gas-liquid flushing device with the fine processing unit, wherein the pores of internal member and the particles of filtering material inside the rough processing unit and the fine processing unit are provided in different sizes; the in-tank vortex and air-flotation deoiling processing unit is provided in the upper part of the tank and is connected to the water inlet pipe; a rough or fine micro-vortex adsorption coalescence processing unit and a rough or fine filtration purification unit are provided between the upper and lower filter plates; an secondary or tertiary electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing unit in a rough or fine processing tank is provided below the lower filter plate, respectively.
4. The standardized oilfield water treatment device using physical method described above, wherein the polishing unit is divided into three processing units inside; the upper part is an adsorptive particulate filtering material filtering unit; the middle part is a quartus electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing unit in a polishing tank and the lower part is a membrane filtration processing unit.
2. The standardized oilfield water treatment device using physical method described above, wherein an in-pool vortex and air-flotation deoiling processing unit is provided on a small bucket body at the beginning of the liquid inlet in the multi-function processing water tank; an electro-adsorption processing unit is provided in the vortex and air-flotation deoiling processing unit; an electro-flotation processing unit is provided on four outer sides of the vortex and air-flotation deoiling processing unit; a micro-electrolysis processing unit is provided on the left side of the small bucket body; a microbiological and biochemical processing unit is provided on the right side of the large bucket body; a sedimentation purification processing unit is provided on the left side of the large bucket body, and an in-pool primary electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing unit is provided on the three walls of the tank body in the lower part inside the sedimentation purification processing unit.
3. The standardized oilfield water treatment device using physical method described above, wherein the internal structure of the rough processing unit is the same as that of the fine processing unit, and shares a set of mixed gas-liquid flushing device with the fine processing unit, wherein the pores of internal member and the particles of filtering material inside the rough processing unit and the fine processing unit are provided in different sizes; the in-tank vortex and air-flotation deoiling processing unit is provided in the upper part of the tank and is connected to the water inlet pipe; a rough or fine micro-vortex adsorption coalescence processing unit and a rough or fine filtration purification unit are provided between the upper and lower filter plates; an secondary or tertiary electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing unit in a rough or fine processing tank is provided below the lower filter plate, respectively.
4. The standardized oilfield water treatment device using physical method described above, wherein the polishing unit is divided into three processing units inside; the upper part is an adsorptive particulate filtering material filtering unit; the middle part is a quartus electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing unit in a polishing tank and the lower part is a membrane filtration processing unit.
5. The standardized oilfield water treatment device using physical method described above, wherein a liquid inlet member is provided at a lower tangential line of the tank body of the oil mud water separation device, wherein a dosing stirring member and a coagulating sedimentation member are provided in the tank; the upper part of the tank is provided with an air-floatation oil recovering member; a water draining member is provided in the middle of the tank body, and a sludge discharge member is provided at the bottom of the tank body; the oil mud water separation device overflows oil to recover the oil into the oil recovery system, and collects water and returns it to the multi-function processing water tank for reprocessing;
the settled slurry is processed in the sludge slurry concentration or solidification device.
the settled slurry is processed in the sludge slurry concentration or solidification device.
6. The standardized oilfield water treatment device using physical method described above, wherein the centrifugal sludge dehydrator, spiral sludge dehydrator or plate frame filter press may be chosen for the sludge slurry concentration or solidification device according to the different water contents of the slurry discharged to concentrate or solidify the filtered contaminants and clear them out of the wastewater treatment system.
7. The standardized oilfield water treatment device using physical method described above, wherein the rough processing unit shares a set of mixed gas-liquid flushing device with the fine processing unit; the mixed gas-liquid flushing device includes an air compressor, a gas tank, a filtering material circulating pump and a backwash pump; the inlet orifice of the backwash pump is connected to the backwash water source; the outlet orifice of the backwash pump is connected to the backwash inlet orifices of the rough processing unit and the fine processing unit respectively;
the feed orifice of the filtering material circulating pump is connected to the discharge orifices of the rough processing unit and the fine processing unit respectively; the discharge orifice of the filtering material circulating pump is connected to the feed orifices of the rough processing unit and the fine processing unit respectively; the air compressor supplies air to the air tank; the air outlet orifice of the air tank is connected to the backwash water inlet lines of the rough processing unit and the fine processing unit respectively.
the feed orifice of the filtering material circulating pump is connected to the discharge orifices of the rough processing unit and the fine processing unit respectively; the discharge orifice of the filtering material circulating pump is connected to the feed orifices of the rough processing unit and the fine processing unit respectively; the air compressor supplies air to the air tank; the air outlet orifice of the air tank is connected to the backwash water inlet lines of the rough processing unit and the fine processing unit respectively.
8. A process of the standardized oilfield water treatment device using physical method described above, wherein the process includes the following steps:
(1) the water treated by the multi-function processing water tank is subjected to a secondary air-dissolving and then fed into the in-tank vortex and air-flotation deoiling processing unit of the rough processing unit for the secondary vortex and air-flotation deoiling; the water deoiled by air-flotation enters the micro-vortex adsorption coalescence processing unit in which small particles are coalesced into large particles, small oil beads are coalesced into large oil beads, and large oil beads are floated upward and removed by a micro-vortex labyrinth made of rough absorbent coalescence fillers; then, the water is filtered and purified by rough filtering media, and large particles suspended in the water are trapped on the surface of the filtering layer; the filtered water enters an electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing unit in a rough processing tank for the secondary electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing, thereby the processing of the rough processing unit from incoming to outgoing is completed;
(2) the water treated by the rough processing unit is subjected to a tertiary air-dissolving and then fed into the in-tank vortex and air-flotation deoiling processing unit of the fine processing unit for the tertiary vortex and air-flotation deoiling; the water deoiled by air-flotation enters the micro-vortex adsorption coalescence processing unit in which smaller particles are coalesced into large particles, smaller oil beads are coalesced into large oil beads, and large oil beads are floated upward and removed by a micro-vortex labyrinth made of fine absorbent coalescence fillers; then, the water is filtered by fine filtering material, and small and medium-sized particles suspended in the water are trapped on the surface of the filtering layer; the filtered water enters an electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing unit in a polishing tank for the tertiary electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing, thereby the processing of the fine processing unit from incoming to outgoing is completed;
(3) the water treated by the fine processing unit enters into the adsorption filtration unit in the polishing unit, and is adsorbed and filtered by the activated carbon filtering layer to further improve the water quality so as to meet the water quality requirements of membrane filtration; the adsorbed and filtered water in the activated carbon filtering layer enters downward into the electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing unit in the polishing tank for the quartus electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing to further improve the effect of antiscale, sterilization, deoxygenation and corrosion mitigation processing, in order to prevent the pores in the membrane from being blocked due to scaling, prolonging the membrane treatment effect and service life; after the quartus electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing, the water enters the membrane filtration processing unit for membrane filtration; the water after membrane filtration reaches the maximum 5-1-1 water quality standard for oilfield reinjection water, thereby the processing of the polishing unit from incoming to outgoing is completed;
the tank body of the polishing unit is provided with two water outlets, wherein the upper water outlet is for the water after membrane filtration, and the lower water outlet is for the quartus electropolar water and the isolated oil and backwash drain enter into the blowdown tank.
(1) the water treated by the multi-function processing water tank is subjected to a secondary air-dissolving and then fed into the in-tank vortex and air-flotation deoiling processing unit of the rough processing unit for the secondary vortex and air-flotation deoiling; the water deoiled by air-flotation enters the micro-vortex adsorption coalescence processing unit in which small particles are coalesced into large particles, small oil beads are coalesced into large oil beads, and large oil beads are floated upward and removed by a micro-vortex labyrinth made of rough absorbent coalescence fillers; then, the water is filtered and purified by rough filtering media, and large particles suspended in the water are trapped on the surface of the filtering layer; the filtered water enters an electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing unit in a rough processing tank for the secondary electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing, thereby the processing of the rough processing unit from incoming to outgoing is completed;
(2) the water treated by the rough processing unit is subjected to a tertiary air-dissolving and then fed into the in-tank vortex and air-flotation deoiling processing unit of the fine processing unit for the tertiary vortex and air-flotation deoiling; the water deoiled by air-flotation enters the micro-vortex adsorption coalescence processing unit in which smaller particles are coalesced into large particles, smaller oil beads are coalesced into large oil beads, and large oil beads are floated upward and removed by a micro-vortex labyrinth made of fine absorbent coalescence fillers; then, the water is filtered by fine filtering material, and small and medium-sized particles suspended in the water are trapped on the surface of the filtering layer; the filtered water enters an electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing unit in a polishing tank for the tertiary electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing, thereby the processing of the fine processing unit from incoming to outgoing is completed;
(3) the water treated by the fine processing unit enters into the adsorption filtration unit in the polishing unit, and is adsorbed and filtered by the activated carbon filtering layer to further improve the water quality so as to meet the water quality requirements of membrane filtration; the adsorbed and filtered water in the activated carbon filtering layer enters downward into the electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing unit in the polishing tank for the quartus electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing to further improve the effect of antiscale, sterilization, deoxygenation and corrosion mitigation processing, in order to prevent the pores in the membrane from being blocked due to scaling, prolonging the membrane treatment effect and service life; after the quartus electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing, the water enters the membrane filtration processing unit for membrane filtration; the water after membrane filtration reaches the maximum 5-1-1 water quality standard for oilfield reinjection water, thereby the processing of the polishing unit from incoming to outgoing is completed;
the tank body of the polishing unit is provided with two water outlets, wherein the upper water outlet is for the water after membrane filtration, and the lower water outlet is for the quartus electropolar water and the isolated oil and backwash drain enter into the blowdown tank.
9. A process of the standardized oilfield water treatment device using physical method described above, wherein the process of the multi-function processing water tank includes the following steps:
(1) the water containing dissolved gas first enters the vortex and air-flotation deoiling processing unit in the multi-function processing water tank for centrifugation and air-flotation deoiling;
(2) the water after centrifugation and air-flotation deoiling enters into the electro-adsorption processing unit for polar substance adsorption, decolorization, colloid accumulating and water hardness reduction;
(3) after the polar substance adsorption, decolorization, colloid accumulating and water hardness reduction, the water enters the electro-flotation processing unit for the secondary deoiling, decolorization, colloid accumulating and water hardness reduction using electro-flotation;
(4) after the secondary deoiling, decolorization, colloid accumulating and water hardness reduction using electro-flotation, the water enters the micro-electrolysis processing unit for H+ depolarization processing by micro-electrolysis fillers to reduce the corrosiveness of the water;
(5) the water with reduced corrosiveness enters the microbiological and biochemical processing unit for biochemical degradation of organic matter to reduce the COD of the water;
(6) the water with reduced COD enters the sedimentation purification processing unit and the settleable particles may settle to the bottom of the tank by prolonged residence time, and the sediment is discharged into the blowdown tank periodically or continuously;
(7) the water settled enters the in-pool electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing unit for the primary antiscale, sterilization, deoxygenation and corrosion mitigation processing, and the isolated oil and slurry are discharged into the blowdown tank.
(1) the water containing dissolved gas first enters the vortex and air-flotation deoiling processing unit in the multi-function processing water tank for centrifugation and air-flotation deoiling;
(2) the water after centrifugation and air-flotation deoiling enters into the electro-adsorption processing unit for polar substance adsorption, decolorization, colloid accumulating and water hardness reduction;
(3) after the polar substance adsorption, decolorization, colloid accumulating and water hardness reduction, the water enters the electro-flotation processing unit for the secondary deoiling, decolorization, colloid accumulating and water hardness reduction using electro-flotation;
(4) after the secondary deoiling, decolorization, colloid accumulating and water hardness reduction using electro-flotation, the water enters the micro-electrolysis processing unit for H+ depolarization processing by micro-electrolysis fillers to reduce the corrosiveness of the water;
(5) the water with reduced corrosiveness enters the microbiological and biochemical processing unit for biochemical degradation of organic matter to reduce the COD of the water;
(6) the water with reduced COD enters the sedimentation purification processing unit and the settleable particles may settle to the bottom of the tank by prolonged residence time, and the sediment is discharged into the blowdown tank periodically or continuously;
(7) the water settled enters the in-pool electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing unit for the primary antiscale, sterilization, deoxygenation and corrosion mitigation processing, and the isolated oil and slurry are discharged into the blowdown tank.
10. A process of the standardized oilfield water treatment device using physical method described above, wherein the process of the mixed gas-liquid flushing includes the following steps:
(1) before start-up of the backwash pump, the filtering material is subjected to gas explosion with compressed air so that the compacted filtering material may be loosened by the gas explosion;
(2) after the filtering material is loosened, the backwash pump is started to perform the mixed gas-liquid backwash, and gas introduction is stopped upon the backwash pump acting normally;
(3) after the gas introduction is stopped, the filtering material circulating pump may be started to perform backwash cycle of the filtering material, and after the filtering material is cleaned, the filtering material circulating pump is stopped first, then the backwash pump is stopped, and the operation may be resumed.
The technical schemes provided by the disclosure have the following beneficial effects: The process of the standardized oilfield water treatment device or process using physical method is a closed process, which effectively controls the occurrence of oil, water and gas spilling accidents, is safe to use, and has outstanding environmental benefits; it requires only power up and gas introduction but not dosing during wastewater treatment processes, so the low operation cost can be achieved; it may reduce the generation of sludge quantity and reduce the cost of sludge treatment;
a complete sludge slurry treatment system is provided to effectively control the vicious circle caused by the backflow of pollutants in the system, and ensure that the water output at each level meets the classification standard.
DESCRIPTION OF THE DRAWINGS
Fig. 1 is an assembled view of the process according to the disclosure;
Fig. 2 is a schematic view of the multi-function processing water tank;
Fig. 3 is a structure diagram of the rough and fine processing units;
Fig. 4 is a structure diagram of the polishing units;
Fig. 5 is a structure diagram of the oil mud water separation device;
Fig. 6 is an assembled view of the mixed gas-liquid flushing regeneration device.
In the figures: 1. settling tank, 2. three-phase separator, 3. settling basin, 4. primary lift pump, 5. multi-function processing water tank, 6. secondary lift pump, 7.
rough processing unit, 8. fine processing unit, 9. polishing unit, 10. air compressor, 11. air tank, 12. blowdown tank, 13. slurry lift pump, 14. oil mud water separation device, 15. sludge slurry concentration or solidification device, 16. in-pool vortex and air-flotation deoiling processing unit, 17. electro-adsorption processing unit, 18. electro-flotation processing unit, 19. micro-electrolysis processing unit, 20.
microbiological and biochemical processing unit, 21. sedimentation purification processing unit, 22.
primary electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing unit, 23. in-tank vortex and air-flotation deoiling processing unit, 24.
micro-vortex adsorption coalescence processing unit, 25. filtration purification unit, 26. secondary or tertiary electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing unit, 27. adsorptive particulate filter material filtering
(1) before start-up of the backwash pump, the filtering material is subjected to gas explosion with compressed air so that the compacted filtering material may be loosened by the gas explosion;
(2) after the filtering material is loosened, the backwash pump is started to perform the mixed gas-liquid backwash, and gas introduction is stopped upon the backwash pump acting normally;
(3) after the gas introduction is stopped, the filtering material circulating pump may be started to perform backwash cycle of the filtering material, and after the filtering material is cleaned, the filtering material circulating pump is stopped first, then the backwash pump is stopped, and the operation may be resumed.
The technical schemes provided by the disclosure have the following beneficial effects: The process of the standardized oilfield water treatment device or process using physical method is a closed process, which effectively controls the occurrence of oil, water and gas spilling accidents, is safe to use, and has outstanding environmental benefits; it requires only power up and gas introduction but not dosing during wastewater treatment processes, so the low operation cost can be achieved; it may reduce the generation of sludge quantity and reduce the cost of sludge treatment;
a complete sludge slurry treatment system is provided to effectively control the vicious circle caused by the backflow of pollutants in the system, and ensure that the water output at each level meets the classification standard.
DESCRIPTION OF THE DRAWINGS
Fig. 1 is an assembled view of the process according to the disclosure;
Fig. 2 is a schematic view of the multi-function processing water tank;
Fig. 3 is a structure diagram of the rough and fine processing units;
Fig. 4 is a structure diagram of the polishing units;
Fig. 5 is a structure diagram of the oil mud water separation device;
Fig. 6 is an assembled view of the mixed gas-liquid flushing regeneration device.
In the figures: 1. settling tank, 2. three-phase separator, 3. settling basin, 4. primary lift pump, 5. multi-function processing water tank, 6. secondary lift pump, 7.
rough processing unit, 8. fine processing unit, 9. polishing unit, 10. air compressor, 11. air tank, 12. blowdown tank, 13. slurry lift pump, 14. oil mud water separation device, 15. sludge slurry concentration or solidification device, 16. in-pool vortex and air-flotation deoiling processing unit, 17. electro-adsorption processing unit, 18. electro-flotation processing unit, 19. micro-electrolysis processing unit, 20.
microbiological and biochemical processing unit, 21. sedimentation purification processing unit, 22.
primary electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing unit, 23. in-tank vortex and air-flotation deoiling processing unit, 24.
micro-vortex adsorption coalescence processing unit, 25. filtration purification unit, 26. secondary or tertiary electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing unit, 27. adsorptive particulate filter material filtering
11 unit, 28. quartus electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing unit, 29. membrane filtration purification unit, 30.
liquid inlet member, 31. dosing stirring member, 32. air-floatation oil recovering member, 33.
coagulating sedimentation member, 34. water draining member, 35. sludge discharge member, 36. filtering material circulating pump, 37. backwash pump DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
The disclosure will be further described in detail as follows with reference to the drawings and embodiments.
As shown in Fig. 1-6, a standardized oilfield water treatment device using physical method includes two parts: a wastewater treatment system and a sludge treatment system, wherein the wastewater treatment system includes a settling tank 1, a three-phase separator 2, a settling basin 3, a primary lift pump 4, a multi-function processing water tank 5, a secondary lift pump 6, a rough processing unit 7, a fine processing unit 8, a polishing unit 9, an air compressor 10 and an air tank 11; the sludge treatment system includes a blowdown tank 12, a slurry lift pump 13, an oil mud water separation device 14 and a sludge slurry concentration or solidification device 15;
the multi-function processing water tank 5 is used as the first stage of wastewater treatment, wherein the water inlet of the multi-function processing water tank is connected to the water outlet of the settling tank 1 or the three-phase separator 2, or connected to the outlet orifice of the primary lift pump 4 of the settling basin 3; the rough processing unit 7 is used as the second stage of wastewater treatment, and the secondary lift pump 6 is provided on the communicating pipe of the water inlet of the rough processing unit 7 and the water outlet of the multi-function processing water tank 5, and the inlet of the secondary lift pump 6 is connected to the water outlet orifice of the multi-function processing water tank, and the water outlet orifice of the secondary lift pump 6 is connected to the water inlet orifice of the rough processing
liquid inlet member, 31. dosing stirring member, 32. air-floatation oil recovering member, 33.
coagulating sedimentation member, 34. water draining member, 35. sludge discharge member, 36. filtering material circulating pump, 37. backwash pump DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
The disclosure will be further described in detail as follows with reference to the drawings and embodiments.
As shown in Fig. 1-6, a standardized oilfield water treatment device using physical method includes two parts: a wastewater treatment system and a sludge treatment system, wherein the wastewater treatment system includes a settling tank 1, a three-phase separator 2, a settling basin 3, a primary lift pump 4, a multi-function processing water tank 5, a secondary lift pump 6, a rough processing unit 7, a fine processing unit 8, a polishing unit 9, an air compressor 10 and an air tank 11; the sludge treatment system includes a blowdown tank 12, a slurry lift pump 13, an oil mud water separation device 14 and a sludge slurry concentration or solidification device 15;
the multi-function processing water tank 5 is used as the first stage of wastewater treatment, wherein the water inlet of the multi-function processing water tank is connected to the water outlet of the settling tank 1 or the three-phase separator 2, or connected to the outlet orifice of the primary lift pump 4 of the settling basin 3; the rough processing unit 7 is used as the second stage of wastewater treatment, and the secondary lift pump 6 is provided on the communicating pipe of the water inlet of the rough processing unit 7 and the water outlet of the multi-function processing water tank 5, and the inlet of the secondary lift pump 6 is connected to the water outlet orifice of the multi-function processing water tank, and the water outlet orifice of the secondary lift pump 6 is connected to the water inlet orifice of the rough processing
12 unit 7; the fine processing unit 8 is used as the third stage of wastewater treatment, wherein the water inlet orifice of the fine processing unit 8 is connected to the water outlet orifice of the rough processing unit 7; the polishing unit 9 is used as the fourth stage of wastewater treatment, wherein the water inlet orifice of the polishing unit 9 is connected to the water outlet orifice of the fine processing unit 8, and the polishing unit 9 is provided with two water outlet orifices, which are respectively connected to the water inlet orifices of the purified water storage tank;
the air compressor 10 is connected to the inlet of the air tank 11;
the air outlet of the air tank 11 is connected to the water inlet pipes of the multi-function processing water tank 5, the rough processing unit 7, the fine processing unit 8 and the polishing unit 9, and to the backwash water inlet pipes of the rough processing unit 7 and the fine processing unit 8, respectively;
the multi-function processing water tank 5, the rough processing unit 7, the fine processing unit 8 and the polishing unit 9 are set to be used in parallel according to the size of the processing amount;
the oil mud water separation device 14 in the sludge slurry treatment system is used as the first stage, and the sludge slurry concentration or solidification device 15 is used as the second stage;
the inlet of the blowdown tank 12 is connected to the discharge orifice of the multi-function processing water tank 5, the rough processing unit 7, the fine processing unit 8 and the polishing unit 9; the outlet of the blowdown tank is connected to the liquid inlet orifice of the oil mud water separation device 14 via the slurry lift pump 13; the water outlet orifice of the oil mud water separation device 14 is connected to the inlet orifice of the multi-function processing water tank 5; the discharge orifice of the oil mud water separation device 14 is connected to the feed pipe of the sludge slurry concentration or solidification device 15.
the air compressor 10 is connected to the inlet of the air tank 11;
the air outlet of the air tank 11 is connected to the water inlet pipes of the multi-function processing water tank 5, the rough processing unit 7, the fine processing unit 8 and the polishing unit 9, and to the backwash water inlet pipes of the rough processing unit 7 and the fine processing unit 8, respectively;
the multi-function processing water tank 5, the rough processing unit 7, the fine processing unit 8 and the polishing unit 9 are set to be used in parallel according to the size of the processing amount;
the oil mud water separation device 14 in the sludge slurry treatment system is used as the first stage, and the sludge slurry concentration or solidification device 15 is used as the second stage;
the inlet of the blowdown tank 12 is connected to the discharge orifice of the multi-function processing water tank 5, the rough processing unit 7, the fine processing unit 8 and the polishing unit 9; the outlet of the blowdown tank is connected to the liquid inlet orifice of the oil mud water separation device 14 via the slurry lift pump 13; the water outlet orifice of the oil mud water separation device 14 is connected to the inlet orifice of the multi-function processing water tank 5; the discharge orifice of the oil mud water separation device 14 is connected to the feed pipe of the sludge slurry concentration or solidification device 15.
13 An in-pool vortex and air-flotation deoiling processing unit 16 is provided on a small bucket body at the beginning of the liquid inlet in the multi-function processing water tank 5; an electro-adsorption processing unit 17 is provided in the vortex and air-flotation deoiling processing unit 16; an electro-flotation processing unit 18 is provided on four outer sides of the vortex and air-flotation deoiling processing unit 16; a micro-electrolysis processing unit 19 is provided on the left side of the small bucket body; a microbiological and biochemical processing unit 20 is provided on the right side of the large bucket body; a sedimentation purification processing unit 21 is provided on the left side of the large bucket body, and an in-pool electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing unit 22 is provided on the three walls of the tank body in the lower part inside the sedimentation purification processing unit 21.
The internal structure of the rough processing unit 7 is the same as that of the fine processing unit 8, and shares a set of mixed gas-liquid flushing device with the fine processing unit 8, wherein the pores of internal member and the particles of filtering material inside the rough processing unit 7 and the fine processing unit 8 are provided in different sizes; the in-tank vortex and air-flotation deoiling processing unit 23 is provided in the upper part of the tank and is connected to the water inlet pipe; a rough or fine micro-vortex adsorption coalescence processing unit 24 and a rough or fine filtration purification unit 25 are provided between the upper and lower filter plates;
an electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing unit 26 in a rough or fine processing tank is provided below the lower filter plate.
The polishing unit 9 is divided into three processing units inside, wherein the upper part is an adsorptive particulate filtering material filtering unit 27; the middle part is an electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing unit 28 in a polishing tank and the lower part is a membrane filtration processing unit 29.
The internal structure of the rough processing unit 7 is the same as that of the fine processing unit 8, and shares a set of mixed gas-liquid flushing device with the fine processing unit 8, wherein the pores of internal member and the particles of filtering material inside the rough processing unit 7 and the fine processing unit 8 are provided in different sizes; the in-tank vortex and air-flotation deoiling processing unit 23 is provided in the upper part of the tank and is connected to the water inlet pipe; a rough or fine micro-vortex adsorption coalescence processing unit 24 and a rough or fine filtration purification unit 25 are provided between the upper and lower filter plates;
an electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing unit 26 in a rough or fine processing tank is provided below the lower filter plate.
The polishing unit 9 is divided into three processing units inside, wherein the upper part is an adsorptive particulate filtering material filtering unit 27; the middle part is an electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing unit 28 in a polishing tank and the lower part is a membrane filtration processing unit 29.
14 A liquid inlet member 30 is provided at a lower tangential line of the tank body of the oil mud water separation device, wherein a dosing stirring member 31 and a coagulating sedimentation member 33 are provided in the tank; the upper part of the tank is provided with an air-floatation oil recovering member 32; a water draining member 34 is provided in the middle of the tank body, and a sludge discharge member 35 is provided at the bottom of the tank body; the oil mud water separation device overflows oil to recover the oil into the oil recovery system, and collects water and returns it to the multi-function processing water tank for reprocessing;
the settled slurry is processed in the sludge slurry concentration or solidification device.
The centrifugal sludge dehydrator, spiral sludge dehydrator or plate frame filter press may be chosen for the sludge slurry concentration or solidification device according to the different water contents of the slurry discharged to concentrate or solidify the filtered contaminants and clear them out of the wastewater treatment system.
The rough processing unit 7 shares a set of mixed gas-liquid flushing device with the fine processing unit 8, wherein the mixed gas-liquid flushing device includes an air compressor 10, a gas tank 11, a filtering material circulating pump 36 and a backwash pump 37; the inlet orifice of the backwash pump 37 is connected to the backwash water source; the outlet orifice of the backwash pump 37 is connected to the backwash inlet orifices of the rough processing unit 7 and the fine processing unit 8 respectively; the feed orifice of the filtering material circulating pump 36 is connected to the discharge orifices of the rough processing unit 7 and the fine processing unit 8 respectively; the discharge orifice of the filtering material circulating pump 36 is connected to the feed orifices of the rough processing unit 7 and the fine processing unit 8 respectively; the air compressor 10 supplies air to the air tank 11;
the air outlet orifice of the air tank 11 is connected to the backwash water inlet lines of the rough processing unit 7 and the fine processing unit 8 respectively.
The process of the standardized oilfield water treatment device using physical method includes the following steps:
(I) The water treated by the multi-function processing water tank is subjected to a secondary air-dissolving and then fed into the in-tank vortex and air-flotation deoiling processing unit of the rough processing unit for the secondary vortex and air-flotation deoiling; the water deoiled by air-flotation enters the micro-vortex adsorption coalescence processing unit in which small particles are coalesced into large particles, small oil beads are coalesced into large oil beads, and large oil beads are floated upward and removed by a micro-vortex labyrinth made of rough absorbent coalescence fillers; then, the water is filtered and purified by rough filtering media, and large particles suspended in the water are trapped on the surface of the filtering layer; the filtered water enters an electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing unit 26 in a rough processing tank for the secondary electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing, thereby the processing of the rough processing unit from incoming to outgoing is completed;
(2) the water treated by the rough processing unit is subjected to a tertiary air-dissolving and then fed into the in-tank vortex and air-flotation deoiling processing unit of the fine processing unit for the tertiary vortex and air-flotation deoiling; the water deoiled by air-flotation enters the micro-vortex adsorption coalescence processing unit in which smaller particles are coalesced into large particles, smaller oil beads are coalesced into large oil beads, and large oil beads are floated upward and removed by a micro-vortex labyrinth made of fine absorbent coalescence fillers; then, the water is filtered by fine filtering material, and small and medium-sized particles suspended in the water are trapped on the surface of the filtering layer; the filtered water enters an electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing unit in a polishing tank for the tertiary electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing, thereby the processing of the fine processing unit from incoming to outgoing is completed;
(3) the water treated by the fine processing unit enters into the adsorption filtration unit in the polishing unit, and is adsorbed and filtered by the activated carbon filtering layer to further improve the water quality so as to meet the water quality requirements of membrane filtration; the adsorbed and filtered water in the activated carbon filtering layer enters downward into the electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing unit in the polishing tank for the quartus electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing to further improve the effect of antiscale, sterilization, deoxygenation and corrosion mitigation processing, in order to prevent the pores in the membrane from being blocked due to scaling, prolonging the membrane treatment effect and service life; after the quartus electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing, the water enters the membrane filtration processing unit for membrane filtration; the water after membrane filtration reaches the maximum 5-1-1 water quality standard for oilfield reinjection water, thereby the processing of the polishing unit from incoming to outgoing is completed;
the tank body of the polishing unit is provided with two water outlets, wherein the upper water outlet is for the water after membrane filtration, and the lower water outlet is for the quartus electropolar water and the isolated oil and backwash drain enter into the blowdown tank.
The process of the multi-function processing water tank includes the following steps:
(I) The water containing dissolved gas first enters the vortex and air-flotation deoiling processing unit in the multi-function processing water tank for centrifugation and air-flotation deoiling;
(2) the water after centrifugation and air-flotation deoiling enters into the electro-adsorption processing unit for polar substance adsorption, decolorization, colloid accumulating and water hardness reduction;
(3) after the polar substance adsorption, decolorization, colloid accumulating and water hardness reduction, the water enters the electro-flotation processing unit for the secondary deoiling, decolorization, colloid accumulating and water hardness reduction using electro-flotation;
(4) after the secondary deoiling, decolorization, colloid accumulating and water hardness reduction using electro-flotation, the water enters the micro-electrolysis processing unit for H+ depolarization processing by micro-electrolysis fillers to reduce the corrosiveness of the water;
(5) the water with reduced corrosiveness enters the microbiological and biochemical processing unit for biochemical degradation of organic matter to reduce the COD of the water;
(6) the water with reduced COD enters the sedimentation purification processing unit and the settleable particles may settle to the bottom of the tank by prolonged residence time, and the sediment is discharged into the blowdown tank periodically or continuously;
(7) the water settled enters the in-pool electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing unit for the primary antiscale, sterilization, deoxygenation and corrosion mitigation processing, and the isolated oil and slurry are discharged into the blowdown tank.
The process of the mixed gas-liquid flushing includes the following steps:
(1) Before start-up of the backwash pump, the filtering material is subjected to gas explosion with compressed air so that the compacted filtering material may be loosened by the gas explosion;
(2) after the filtering material is loosened, the backwash pump is started to perform the mixed gas-liquid backwash, and gas introduction is stopped upon the backwash pump acting normally;
(3) after the gas introduction is stopped, the filtering material circulating pump may be started to perform backwash cycle of the filtering material, and after the filtering material is cleaned, the filtering material circulating pump is stopped first, then the backwash pump is stopped, and the operation may be resumed.
The first-stage oil mud water separation device in the sludge slurry treatment system of the standardized oilfield water treatment device and process using physical method according to the disclosure integrates various functions such as stirring, vortex coagulation, air-floatation oil recovering, and static sedimentation and mud removal.
It overflows oil to recover the oil into the oil recovery system, and collects water and returns it to the multi-function processing water tank for reprocessing; the settled slurry is processed in the sludge slurry concentration or solidification device.
As shown in Fig. 1, centrifugal sludge dehydrator, spiral sludge dehydrator or plate frame filter press may be chosen for the second-stage sludge slurry concentration or solidification device in the sludge slurry treatment system of the standardized oilfield water treatment device and process using physical method according to the different water contents of the slurry discharged, in order to effectively clear the filtered contaminants out of the system to solve the problem of the vicious circle of pollutants in the water treatment system, and to ensure that the water quality of the entire water treatment reaches the standard.
The standardized oilfield water treatment device and process using physical method have strong adaptability to incoming water such that the various indexes of discharged water can meet all the standards required in the case that indicators for the content of oil and suspended solid can both be relaxed to 1000 mg/L, wherein the main standards for their indicator classification are graded as follows:
1. The water treated by the multi-function processing water tank may reach the standard requirements of suspended solid < 30 mg/L, median particle size < 5 gm and oil content < 50 mg/L;
2. The water treated by the multi-function processing water tank + the rough processing unit may reach the standard requirements of suspended solid < 10 mg/L, median particle size < 4 gm and oil content < 30 mg/L;
3. The water treated by the multi-function processing water tank + the rough processing unit + the fine processing unit may reach the standard requirements of suspended solid < 5 mg/L, median particle size < 3 gm and oil content < 15 mg/L;
4. After treated by the multi-function processing water tank + the rough processing unit + the fine processing unit + the polishing unit, the water from the lower outlet (the water before membrane filtration) may reach the standard requirements of suspended solid < 2mg/L, median particle size < 1.5 gm and oil content < 6mg/L;
5. After treated by the multi-function processing water tank + the rough processing unit + the fine processing unit + the polishing unit, the water from the upper outlet (the water after membrane filtration) may reach the standard requirements of suspended solid < lmg/L, median particle size < 1 [trn and oil content < 5mg/L;
The above is the preferred embodiments of the disclosure. For those of ordinary skill in the art, changes, modifications, substitutions and variations to the embodiments may still fall within the protection scope of the disclosure without departing from the principle and spirit of the disclosure in accordance with the teachings of the disclosure.
the settled slurry is processed in the sludge slurry concentration or solidification device.
The centrifugal sludge dehydrator, spiral sludge dehydrator or plate frame filter press may be chosen for the sludge slurry concentration or solidification device according to the different water contents of the slurry discharged to concentrate or solidify the filtered contaminants and clear them out of the wastewater treatment system.
The rough processing unit 7 shares a set of mixed gas-liquid flushing device with the fine processing unit 8, wherein the mixed gas-liquid flushing device includes an air compressor 10, a gas tank 11, a filtering material circulating pump 36 and a backwash pump 37; the inlet orifice of the backwash pump 37 is connected to the backwash water source; the outlet orifice of the backwash pump 37 is connected to the backwash inlet orifices of the rough processing unit 7 and the fine processing unit 8 respectively; the feed orifice of the filtering material circulating pump 36 is connected to the discharge orifices of the rough processing unit 7 and the fine processing unit 8 respectively; the discharge orifice of the filtering material circulating pump 36 is connected to the feed orifices of the rough processing unit 7 and the fine processing unit 8 respectively; the air compressor 10 supplies air to the air tank 11;
the air outlet orifice of the air tank 11 is connected to the backwash water inlet lines of the rough processing unit 7 and the fine processing unit 8 respectively.
The process of the standardized oilfield water treatment device using physical method includes the following steps:
(I) The water treated by the multi-function processing water tank is subjected to a secondary air-dissolving and then fed into the in-tank vortex and air-flotation deoiling processing unit of the rough processing unit for the secondary vortex and air-flotation deoiling; the water deoiled by air-flotation enters the micro-vortex adsorption coalescence processing unit in which small particles are coalesced into large particles, small oil beads are coalesced into large oil beads, and large oil beads are floated upward and removed by a micro-vortex labyrinth made of rough absorbent coalescence fillers; then, the water is filtered and purified by rough filtering media, and large particles suspended in the water are trapped on the surface of the filtering layer; the filtered water enters an electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing unit 26 in a rough processing tank for the secondary electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing, thereby the processing of the rough processing unit from incoming to outgoing is completed;
(2) the water treated by the rough processing unit is subjected to a tertiary air-dissolving and then fed into the in-tank vortex and air-flotation deoiling processing unit of the fine processing unit for the tertiary vortex and air-flotation deoiling; the water deoiled by air-flotation enters the micro-vortex adsorption coalescence processing unit in which smaller particles are coalesced into large particles, smaller oil beads are coalesced into large oil beads, and large oil beads are floated upward and removed by a micro-vortex labyrinth made of fine absorbent coalescence fillers; then, the water is filtered by fine filtering material, and small and medium-sized particles suspended in the water are trapped on the surface of the filtering layer; the filtered water enters an electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing unit in a polishing tank for the tertiary electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing, thereby the processing of the fine processing unit from incoming to outgoing is completed;
(3) the water treated by the fine processing unit enters into the adsorption filtration unit in the polishing unit, and is adsorbed and filtered by the activated carbon filtering layer to further improve the water quality so as to meet the water quality requirements of membrane filtration; the adsorbed and filtered water in the activated carbon filtering layer enters downward into the electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing unit in the polishing tank for the quartus electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing to further improve the effect of antiscale, sterilization, deoxygenation and corrosion mitigation processing, in order to prevent the pores in the membrane from being blocked due to scaling, prolonging the membrane treatment effect and service life; after the quartus electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing, the water enters the membrane filtration processing unit for membrane filtration; the water after membrane filtration reaches the maximum 5-1-1 water quality standard for oilfield reinjection water, thereby the processing of the polishing unit from incoming to outgoing is completed;
the tank body of the polishing unit is provided with two water outlets, wherein the upper water outlet is for the water after membrane filtration, and the lower water outlet is for the quartus electropolar water and the isolated oil and backwash drain enter into the blowdown tank.
The process of the multi-function processing water tank includes the following steps:
(I) The water containing dissolved gas first enters the vortex and air-flotation deoiling processing unit in the multi-function processing water tank for centrifugation and air-flotation deoiling;
(2) the water after centrifugation and air-flotation deoiling enters into the electro-adsorption processing unit for polar substance adsorption, decolorization, colloid accumulating and water hardness reduction;
(3) after the polar substance adsorption, decolorization, colloid accumulating and water hardness reduction, the water enters the electro-flotation processing unit for the secondary deoiling, decolorization, colloid accumulating and water hardness reduction using electro-flotation;
(4) after the secondary deoiling, decolorization, colloid accumulating and water hardness reduction using electro-flotation, the water enters the micro-electrolysis processing unit for H+ depolarization processing by micro-electrolysis fillers to reduce the corrosiveness of the water;
(5) the water with reduced corrosiveness enters the microbiological and biochemical processing unit for biochemical degradation of organic matter to reduce the COD of the water;
(6) the water with reduced COD enters the sedimentation purification processing unit and the settleable particles may settle to the bottom of the tank by prolonged residence time, and the sediment is discharged into the blowdown tank periodically or continuously;
(7) the water settled enters the in-pool electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing unit for the primary antiscale, sterilization, deoxygenation and corrosion mitigation processing, and the isolated oil and slurry are discharged into the blowdown tank.
The process of the mixed gas-liquid flushing includes the following steps:
(1) Before start-up of the backwash pump, the filtering material is subjected to gas explosion with compressed air so that the compacted filtering material may be loosened by the gas explosion;
(2) after the filtering material is loosened, the backwash pump is started to perform the mixed gas-liquid backwash, and gas introduction is stopped upon the backwash pump acting normally;
(3) after the gas introduction is stopped, the filtering material circulating pump may be started to perform backwash cycle of the filtering material, and after the filtering material is cleaned, the filtering material circulating pump is stopped first, then the backwash pump is stopped, and the operation may be resumed.
The first-stage oil mud water separation device in the sludge slurry treatment system of the standardized oilfield water treatment device and process using physical method according to the disclosure integrates various functions such as stirring, vortex coagulation, air-floatation oil recovering, and static sedimentation and mud removal.
It overflows oil to recover the oil into the oil recovery system, and collects water and returns it to the multi-function processing water tank for reprocessing; the settled slurry is processed in the sludge slurry concentration or solidification device.
As shown in Fig. 1, centrifugal sludge dehydrator, spiral sludge dehydrator or plate frame filter press may be chosen for the second-stage sludge slurry concentration or solidification device in the sludge slurry treatment system of the standardized oilfield water treatment device and process using physical method according to the different water contents of the slurry discharged, in order to effectively clear the filtered contaminants out of the system to solve the problem of the vicious circle of pollutants in the water treatment system, and to ensure that the water quality of the entire water treatment reaches the standard.
The standardized oilfield water treatment device and process using physical method have strong adaptability to incoming water such that the various indexes of discharged water can meet all the standards required in the case that indicators for the content of oil and suspended solid can both be relaxed to 1000 mg/L, wherein the main standards for their indicator classification are graded as follows:
1. The water treated by the multi-function processing water tank may reach the standard requirements of suspended solid < 30 mg/L, median particle size < 5 gm and oil content < 50 mg/L;
2. The water treated by the multi-function processing water tank + the rough processing unit may reach the standard requirements of suspended solid < 10 mg/L, median particle size < 4 gm and oil content < 30 mg/L;
3. The water treated by the multi-function processing water tank + the rough processing unit + the fine processing unit may reach the standard requirements of suspended solid < 5 mg/L, median particle size < 3 gm and oil content < 15 mg/L;
4. After treated by the multi-function processing water tank + the rough processing unit + the fine processing unit + the polishing unit, the water from the lower outlet (the water before membrane filtration) may reach the standard requirements of suspended solid < 2mg/L, median particle size < 1.5 gm and oil content < 6mg/L;
5. After treated by the multi-function processing water tank + the rough processing unit + the fine processing unit + the polishing unit, the water from the upper outlet (the water after membrane filtration) may reach the standard requirements of suspended solid < lmg/L, median particle size < 1 [trn and oil content < 5mg/L;
The above is the preferred embodiments of the disclosure. For those of ordinary skill in the art, changes, modifications, substitutions and variations to the embodiments may still fall within the protection scope of the disclosure without departing from the principle and spirit of the disclosure in accordance with the teachings of the disclosure.
Claims (10)
1. A standardized oilfield water treatment device using physical method, wherein the device includes two parts: a wastewater treatment system and a sludge treatment system; the wastewater treatment system includes a settling tank, a three-phase separator, a settling basin, a primary lift pump, a multi-function processing water tank, a secondary lift pump, a rough processing unit, a fine processing unit, a polishing unit, an air compressor and an air tank; the sludge treatment system includes a blowdown tank, a slurry lift pump, an oil mud water separation device and a sludge slurry concentration or solidification device;
the multi-function processing water tank is used as the first stage of wastewater treatment, wherein the water inlet of the multi-function processing water tank is connected to the water outlet of the settling tank or the three-phase separator, or connected to the outlet orifice of the primary lift pump of the settling basin; the rough processing unit is used as the second stage of wastewater treatment, wherein the secondary lift pump is provided on the communicating pipe of the water inlet of the rough processing unit and the water outlet of the multi-function processing water tank, and the inlet of the secondary lift pump is connected to the water outlet orifice of the multi-function processing water tank, and the water outlet orifice of the secondary lift pump is connected to the water inlet orifice of the rough processing unit; the fine processing unit is used as the third stage of wastewater treatment, wherein the water inlet orifice of the fine processing unit is connected to the water outlet orifice of the rough processing unit; the polishing unit is used as the fourth stage of wastewater treatment, wherein the water inlet orifice of the polishing unit is connected to the water outlet orifice of the fine processing unit, and the polishing unit is provided with two water outlet orifices, which are respectively connected to the water inlet orifices of the purified water storage tank;
the air compressor is connected to the inlet of the air tank;
the air outlet of the air tank is connected to the water inlet pipes of the multi-function processing water tank, the rough processing unit, the fine processing unit and the polishing unit, and to the backwash water inlet pipes of the rough processing unit and the fine processing unit, respectively;
the multi-function processing water tank, the rough processing unit, the fine processing unit and the polishing unit are set to be used in parallel according to the size of the processing amount;
the oil mud water separation device in the sludge slurry treatment system is used as the first stage, and the sludge slurry concentration or solidification device is used as the second stage;
the inlet of the blowdown tank is connected to the discharge orifices of the multi-function processing water tank, the rough processing unit, the fine processing unit and the polishing unit; the outlet of the blowdown tank is connected to the liquid inlet orifice of the oil mud water separation device via the slurry lift pump; the water outlet orifice of the oil mud water separation device is connected to the inlet orifice of the multi-function processing water tank; the discharge orifice of the oil mud water separation device is connected to the feed pipe of the sludge slurry concentration or solidification device.
the multi-function processing water tank is used as the first stage of wastewater treatment, wherein the water inlet of the multi-function processing water tank is connected to the water outlet of the settling tank or the three-phase separator, or connected to the outlet orifice of the primary lift pump of the settling basin; the rough processing unit is used as the second stage of wastewater treatment, wherein the secondary lift pump is provided on the communicating pipe of the water inlet of the rough processing unit and the water outlet of the multi-function processing water tank, and the inlet of the secondary lift pump is connected to the water outlet orifice of the multi-function processing water tank, and the water outlet orifice of the secondary lift pump is connected to the water inlet orifice of the rough processing unit; the fine processing unit is used as the third stage of wastewater treatment, wherein the water inlet orifice of the fine processing unit is connected to the water outlet orifice of the rough processing unit; the polishing unit is used as the fourth stage of wastewater treatment, wherein the water inlet orifice of the polishing unit is connected to the water outlet orifice of the fine processing unit, and the polishing unit is provided with two water outlet orifices, which are respectively connected to the water inlet orifices of the purified water storage tank;
the air compressor is connected to the inlet of the air tank;
the air outlet of the air tank is connected to the water inlet pipes of the multi-function processing water tank, the rough processing unit, the fine processing unit and the polishing unit, and to the backwash water inlet pipes of the rough processing unit and the fine processing unit, respectively;
the multi-function processing water tank, the rough processing unit, the fine processing unit and the polishing unit are set to be used in parallel according to the size of the processing amount;
the oil mud water separation device in the sludge slurry treatment system is used as the first stage, and the sludge slurry concentration or solidification device is used as the second stage;
the inlet of the blowdown tank is connected to the discharge orifices of the multi-function processing water tank, the rough processing unit, the fine processing unit and the polishing unit; the outlet of the blowdown tank is connected to the liquid inlet orifice of the oil mud water separation device via the slurry lift pump; the water outlet orifice of the oil mud water separation device is connected to the inlet orifice of the multi-function processing water tank; the discharge orifice of the oil mud water separation device is connected to the feed pipe of the sludge slurry concentration or solidification device.
2. The standardized oilfield water treatment device using physical method according to claim 1, wherein an in-pool vortex and air-flotation deoiling processing unit is provided on a small bucket body at the beginning of the liquid inlet in the multi-function processing water tank; an electro-adsorption processing unit is provided in the vortex and air-flotation deoiling processing unit; an electro-flotation processing unit is provided on four outer sides of the vortex and air-flotation deoiling processing unit; a micro-electrolysis processing unit is provided on the left side of the small bucket body; a microbiological and biochemical processing unit is provided on the right side of the large bucket body; a sedimentation purification processing unit is provided on the left side of the large bucket body, and an in-pool primary electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing unit is provided on the three walls of the tank body in the lower part inside the sedimentation purification processing unit.
3. The standardized oilfield water treatment device using physical method according to claim 1, wherein the internal structure of the rough processing unit is the same as that of the fine processing unit, and shares a set of mixed gas-liquid flushing device with the fine processing unit, wherein the pores of internal member and the particles of filtering material inside the rough processing unit and the fine processing unit are provided in different sizes; the in-tank vortex and air-flotation deoi ling processing unit is provided in the upper part of the tank and is connected to the water inlet pipe; a rough or fine micro-vortex adsorption coalescence processing unit and a rough or fine filtration purification unit are provided between the upper and lower filter plates; an secondary or tertiary electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing unit in a rough or fine processing tank is provided below the lower filter plate, respectively.
4. The standardized oilfield water treatment device using physical method according to claim 1, wherein the polishing unit is divided into three processing units inside; the upper part is an adsorptive particulate filtering material filtering unit; the middle part is a quartus electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing unit in a polishing tank and the lower part is a membrane filtration processing unit.
5. The standardized oilfield water treatment device using physical method according to claim 1, wherein a liquid inlet member is provided at a lower tangential line of the tank body of the oil mud water separation device, wherein a dosing stirring member and a coagulating sedimentation member are provided in the tank; the upper part of the tank is provided with an air-floatation oil recovering member; a water draining member is provided in the middle of the tank body, and a sludge discharge member is provided at the bottom of the tank body; the oil mud water separation device overflows oil to recover the oil into the oil recovery system, and collects water and returns it to the multi-function processing water tank for reprocessing;
the settled slurry is processed in the sludge slurry concentration or solidification device.
the settled slurry is processed in the sludge slurry concentration or solidification device.
6. The standardized oilfield water treatment device using physical method according to claim 1, wherein the centrifugal sludge dehydrator, spiral sludge dehydrator or plate frame filter press may be chosen for the sludge slurry concentration or solidification device according to the different water contents of the slurry discharged to concentrate or solidify the filtered contaminants and clear them out of the wastewater treatment system.
7. The standardized oilfield water treatment device using physical method according to claim 1, wherein the rough processing unit shares a set of mixed gas-liquid flushing device with the fine processing unit; the mixed gas-liquid flushing device includes an air compressor, a gas tank, a filtering material circulating pump and a backwash pump; the inlet orifice of the backwash pump is connected to the backwash water source; the outlet orifice of the backwash pump is connected to the backwash inlet orifices of the rough processing unit and the fine processing unit respectively; the feed orifice of the filtering material circulating pump is connected to the discharge orifices of the rough processing unit and the fine processing unit respectively; the discharge orifice of the filtering material circulating pump is connected to the feed orifices of the rough processing unit and the fine processing unit respectively; the air compressor supplies air to the air tank; the air outlet orifice of the air tank is connected to the backwash water inlet lines of the rough processing unit and the fine processing unit respectively.
8. A process of the standardized oilfield water treatment device using physical method according to any one of claims 1-7, wherein the process includes the following steps:
(I) the water treated by the multi-function processing water tank is subjected to a secondary air-dissolving and then fed into the in-tank vortex and air-flotation deoiling processing unit of the rough processing unit for the secondary vortex and air-flotation deoiling; the water deoiled by air-flotation enters the micro-vortex adsorption coalescence processing unit in which small particles are coalesced into large particles, small oil beads are coalesced into large oil beads, and large oil beads are floated upward and removed by a micro-vortex labyrinth made of rough absorbent coalescence fillers; then, the water is filtered and purified by rough filtering media, and large particles suspended in the water are trapped on the surface of the filtering layer; the filtered water enters an electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing unit in a rough processing tank for the secondary electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing, thereby the processing of the rough processing unit from incoming to outgoing is completed;
(2) the water treated by the rough processing unit is subjected to a tertiary air-dissolving and then fed into the in-tank vortex and air-flotation deoiling processing unit of the fine processing unit for the tertiary vortex and air-flotation deoiling; the water deoiled by air-flotation enters the micro-vortex adsorption coalescence processing unit in which smaller particles are coalesced into large particles, smaller oil beads are coalesced into large oil beads, and large oil beads are floated upward and removed by a micro-vortex labyrinth made of fine absorbent coalescence fillers; then, the water is filtered by fine filtering material, and small and medium-sized particles suspended in the water are trapped on the surface of the filtering layer; the filtered water enters an electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing unit in a polishing tank for the tertiary electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing, thereby the processing of the fine processing unit from incoming to outgoing is completed;
(3) the water treated by the fine processing unit enters into the adsorption filtration unit in the polishing unit, and is adsorbed and filtered by the activated carbon filtering layer to further improve the water quality so as to meet the water quality requirements of membrane filtration; the adsorbed and filtered water in the activated carbon filtering layer enters downward into the electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing unit in the polishing tank for the quartus electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing to further improve the effect of antiscale, sterilization, deoxygenation and corrosion mitigation processing, in order to prevent the pores in the membrane from being blocked due to scaling, prolonging the membrane treatment effect and service life; after the quartus electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing, the water enters the membrane filtration processing unit for membrane filtration; the water after membrane filtration reaches the maximum 5-1-1 water quality standard for oilfield reinjection water, thereby the processing of the polishing unit from incoming to outgoing is completed;
the tank body of the polishing unit is provided with two water outlets, wherein the upper water outlet is for the water after membrane filtration, and the lower water outlet is for the quartus electropolar water and the isolated oil and backwash drain enter into the blowdown tank.
(I) the water treated by the multi-function processing water tank is subjected to a secondary air-dissolving and then fed into the in-tank vortex and air-flotation deoiling processing unit of the rough processing unit for the secondary vortex and air-flotation deoiling; the water deoiled by air-flotation enters the micro-vortex adsorption coalescence processing unit in which small particles are coalesced into large particles, small oil beads are coalesced into large oil beads, and large oil beads are floated upward and removed by a micro-vortex labyrinth made of rough absorbent coalescence fillers; then, the water is filtered and purified by rough filtering media, and large particles suspended in the water are trapped on the surface of the filtering layer; the filtered water enters an electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing unit in a rough processing tank for the secondary electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing, thereby the processing of the rough processing unit from incoming to outgoing is completed;
(2) the water treated by the rough processing unit is subjected to a tertiary air-dissolving and then fed into the in-tank vortex and air-flotation deoiling processing unit of the fine processing unit for the tertiary vortex and air-flotation deoiling; the water deoiled by air-flotation enters the micro-vortex adsorption coalescence processing unit in which smaller particles are coalesced into large particles, smaller oil beads are coalesced into large oil beads, and large oil beads are floated upward and removed by a micro-vortex labyrinth made of fine absorbent coalescence fillers; then, the water is filtered by fine filtering material, and small and medium-sized particles suspended in the water are trapped on the surface of the filtering layer; the filtered water enters an electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing unit in a polishing tank for the tertiary electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing, thereby the processing of the fine processing unit from incoming to outgoing is completed;
(3) the water treated by the fine processing unit enters into the adsorption filtration unit in the polishing unit, and is adsorbed and filtered by the activated carbon filtering layer to further improve the water quality so as to meet the water quality requirements of membrane filtration; the adsorbed and filtered water in the activated carbon filtering layer enters downward into the electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing unit in the polishing tank for the quartus electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing to further improve the effect of antiscale, sterilization, deoxygenation and corrosion mitigation processing, in order to prevent the pores in the membrane from being blocked due to scaling, prolonging the membrane treatment effect and service life; after the quartus electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing, the water enters the membrane filtration processing unit for membrane filtration; the water after membrane filtration reaches the maximum 5-1-1 water quality standard for oilfield reinjection water, thereby the processing of the polishing unit from incoming to outgoing is completed;
the tank body of the polishing unit is provided with two water outlets, wherein the upper water outlet is for the water after membrane filtration, and the lower water outlet is for the quartus electropolar water and the isolated oil and backwash drain enter into the blowdown tank.
9. A process of the standardized oilfield water treatment device using physical method according to claim 8, wherein the process of the multi-function processing water tank includes the following steps:
(1) the water containing dissolved gas first enters the vortex and air-flotation deoiling processing unit in the multi-function processing water tank for centrifugation and air-flotation deoiling;
(2) the water after centrifugation and air-flotation deoiling enters into the electro-adsorption processing unit for polar substance adsorption, decolorization, colloid accumulating and water hardness reduction;
(3) after the polar substance adsorption, decolorization, colloid accumulating and water hardness reduction, the water enters the electro-flotation processing unit for the secondary deoiling, decolorization, colloid accumulating and water hardness reduction using electro-flotation;
(4) after the secondary deoiling, decolorization, colloid accumulating and water hardness reduction using electro-flotation, the water enters the micro-electrolysis processing unit for H+ depolarization processing by micro-electrolysis fillers to reduce the corrosiveness of the water;
(5) the water with reduced corrosiveness enters the microbiological and biochemical processing unit for biochemical degradation of organic matter to reduce the COD of the water;
(6) the water with reduced COD enters the sedimentation purification processing unit and the settleable particles may settle to the bottom of the tank by prolonged residence time, and the sediment is discharged into the blowdown tank periodically or continuously;
(7) the water settled enters the in-pool electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing unit for the primary antiscale, sterilization, deoxygenation and corrosion mitigation processing, and the isolated oil and slurry are discharged into the blowdown tank.
(1) the water containing dissolved gas first enters the vortex and air-flotation deoiling processing unit in the multi-function processing water tank for centrifugation and air-flotation deoiling;
(2) the water after centrifugation and air-flotation deoiling enters into the electro-adsorption processing unit for polar substance adsorption, decolorization, colloid accumulating and water hardness reduction;
(3) after the polar substance adsorption, decolorization, colloid accumulating and water hardness reduction, the water enters the electro-flotation processing unit for the secondary deoiling, decolorization, colloid accumulating and water hardness reduction using electro-flotation;
(4) after the secondary deoiling, decolorization, colloid accumulating and water hardness reduction using electro-flotation, the water enters the micro-electrolysis processing unit for H+ depolarization processing by micro-electrolysis fillers to reduce the corrosiveness of the water;
(5) the water with reduced corrosiveness enters the microbiological and biochemical processing unit for biochemical degradation of organic matter to reduce the COD of the water;
(6) the water with reduced COD enters the sedimentation purification processing unit and the settleable particles may settle to the bottom of the tank by prolonged residence time, and the sediment is discharged into the blowdown tank periodically or continuously;
(7) the water settled enters the in-pool electropolar antiscale, sterilization, deoxygenation and corrosion mitigation processing unit for the primary antiscale, sterilization, deoxygenation and corrosion mitigation processing, and the isolated oil and slurry are discharged into the blowdown tank.
10. A process of the standardized oilfield water treatment device using physical method according to claim 8, wherein the process of the mixed gas-liquid flushing includes the following steps:
(1) before start-up of the backwash pump, the filtering material is subjected to gas explosion with compressed air so that the compacted filtering material may be loosened by the gas explosion;
(2) after the filtering material is loosened, the backwash pump is started to perform the mixed gas-liquid backwash, and gas introduction is stopped upon the backwash pump acting normally;
(3) after the gas introduction is stopped, the filtering material circulating pump may be started to perform backwash cycle of the filtering material, and after the filtering material is cleaned, the filtering material circulating pump is stopped first, then the backwash pump is stopped, and the operation may be resume.
(1) before start-up of the backwash pump, the filtering material is subjected to gas explosion with compressed air so that the compacted filtering material may be loosened by the gas explosion;
(2) after the filtering material is loosened, the backwash pump is started to perform the mixed gas-liquid backwash, and gas introduction is stopped upon the backwash pump acting normally;
(3) after the gas introduction is stopped, the filtering material circulating pump may be started to perform backwash cycle of the filtering material, and after the filtering material is cleaned, the filtering material circulating pump is stopped first, then the backwash pump is stopped, and the operation may be resume.
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| US20220390171A1 (en) * | 2021-06-08 | 2022-12-08 | Saudi Arabian Oil Company | System for transferring condensate |
| CN115521034A (en) * | 2022-10-28 | 2022-12-27 | 中南大学 | Remediation method for harmless combined treatment of oily sludge |
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| EP2583949A4 (en) * | 2010-06-21 | 2014-04-23 | Xuewen Jiang | Purification processing device of oil-containing sewage |
| CN102120653A (en) * | 2011-01-04 | 2011-07-13 | 西安皓海嘉水处理科技有限责任公司 | Treatment device and method of low-permeability high-salt oil field extracted wastewater |
| CN104355439A (en) * | 2014-10-23 | 2015-02-18 | 西安华陆环保设备有限公司 | Oilfield sewage treatment device |
| CN204897574U (en) * | 2015-07-16 | 2015-12-23 | 兰州交通大学 | Oily waste water contact filtration combination formula advanced treatment unit that flocculates a little |
-
2017
- 2017-06-23 CN CN201710483634.0A patent/CN107129111B/en active Active
-
2018
- 2018-05-17 CA CA3005192A patent/CA3005192A1/en not_active Abandoned
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| US20220390171A1 (en) * | 2021-06-08 | 2022-12-08 | Saudi Arabian Oil Company | System for transferring condensate |
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| CN115007572B (en) * | 2022-05-07 | 2023-11-24 | 大庆瑞雪石油科技开发有限公司 | Screen pipe blocking and scale removal and filter material oil removal cleaning process for sewage filtering tank of combined station |
| CN115521034A (en) * | 2022-10-28 | 2022-12-27 | 中南大学 | Remediation method for harmless combined treatment of oily sludge |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107129111B (en) | 2020-04-24 |
| CN107129111A (en) | 2017-09-05 |
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