CN111318168A - Tubular membrane recycling system for hot water in thickened oil steam flooding and boiler application - Google Patents

Tubular membrane recycling system for hot water in thickened oil steam flooding and boiler application Download PDF

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Publication number
CN111318168A
CN111318168A CN202010247418.8A CN202010247418A CN111318168A CN 111318168 A CN111318168 A CN 111318168A CN 202010247418 A CN202010247418 A CN 202010247418A CN 111318168 A CN111318168 A CN 111318168A
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water
temperature
tubular membrane
filtering device
steam flooding
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肖敏
余晓洁
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Priority to CN202010247418.8A priority Critical patent/CN111318168A/en
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Priority to CN202010997932.3A priority patent/CN111871210B/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/14—Ultrafiltration; Microfiltration
    • B01D61/147—Microfiltration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/14—Ultrafiltration; Microfiltration
    • B01D61/18—Apparatus therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/14—Ultrafiltration; Microfiltration
    • B01D61/20—Accessories; Auxiliary operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
    • B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
    • 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
    • C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B1/00—Methods or layout of installations for water supply
    • E03B1/04—Methods or layout of installations for water supply for domestic or like local supply
    • E03B1/041—Greywater supply systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
    • F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
    • B01D2321/02—Forward flushing
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/20—Heavy metals or heavy metal compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds
    • C02F2101/32—Hydrocarbons, e.g. oil
    • 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
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/10—Solids, e.g. total solids [TS], total suspended solids [TSS] or volatile solids [VS]
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/40—Liquid flow rate
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use
    • Y02A20/30—Relating to industrial water supply, e.g. used for cooling

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  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Hydrology & Water Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

The invention provides a high-temperature water recycling system for thickened oil steam flooding and boiler application, wherein a high-temperature resistant tubular membrane filtering device is installed in a treatment system of oilfield produced water, the oilfield produced water is treated in time by utilizing the performance of a high-temperature resistant tubular microfiltration membrane, the water is treated without being cooled, and high-temperature recyclable water is purified, and the technical scheme designed by the invention comprises the following steps: compared with the chemical drug sedimentation treatment method in the prior art, the method greatly saves the cost and improves the water treatment efficiency; secondly, the produced water can be purified under the condition of not reducing the temperature by using the high-temperature-resistant tubular membrane and directly put into a steam boiler for use, so that a large amount of energy for heating cold water by the boiler is saved, and the treatment cost of the produced water in the oil field is greatly reduced; thirdly, the silicate in the produced water can be filtered through the high-temperature-resistant tubular filtering device, so that the damage of the recovered water to the boiler is avoided.

Description

Tubular membrane recycling system for hot water in thickened oil steam flooding and boiler application
Technical Field
The invention relates to the technical field of recycling of high-temperature water produced in a technology for producing thick oil by utilizing steam flooding, in particular to a recycling system for high-temperature water produced in thick oil steam flooding and application of a boiler.
Background
Since the 60 s of the 20 th century, various technical development practices adopted by thick oil reservoirs at home and abroad prove that a recovery method of injecting steam into the thick oil reservoir is the most effective and becomes one of the most main recovery methods at present, but during the thick oil steam flooding process, a large amount of high-temperature produced water is generated, wherein the produced water contains impurities such as oil, suspended matters, organic matters, metal ions, silicates and the like, and the impurities are removed and then further softened so as to be recycled by a steam boiler.
The traditional treatment process of the produced water in the oil field at present comprises the processes of demulsification, air floatation and oil removal, dosing and precipitation, filtration of various multi-medium filters and the like, the process is complex, a large amount of chemical agents are required to be added every time, the treatment cost is high, the quality of the effluent water is easy to generate large fluctuation, and the silicate in the water is difficult to be fully removed. Because the water for the steam boiler adopts a recycling mode, the concentrations of metal ions, silicate, residual chemical agents and the like are continuously increased, the scaling phenomena of boiler pipelines and steam injection pipelines are very common, the heat transfer efficiency of the boiler is reduced, the production cost is increased, huge potential safety hazards can be generated, and the normal operation of oil field production is seriously influenced. In addition, the extracted high-temperature water is cooled and recycled in the traditional process water treatment process and is conveyed to a boiler for reheating, so that energy waste is caused.
Therefore, the problems to be solved at present are how to solve the produced water treatment and reduce the energy waste in the heavy oil steam flooding process.
Disclosure of Invention
The invention provides a high-temperature water recycling system for thickened oil steam flooding and boiler application, wherein a high-temperature resistant tubular membrane filtering device is installed in a treatment system of oilfield produced water, the oilfield produced water is treated in time by utilizing the performance of a high-temperature resistant tubular microfiltration membrane, the water is treated without being cooled, and high-temperature recyclable water is purified, and the technical scheme designed by the invention comprises the following steps: compared with the chemical drug sedimentation treatment method in the prior art, the method greatly saves the cost and improves the water treatment efficiency; secondly, the produced water can be purified under the condition of not reducing the temperature by using the high-temperature-resistant tubular membrane and directly put into a steam boiler for use, so that a large amount of energy for heating cold water by the boiler is saved, and the treatment cost of the produced water in the oil field is greatly reduced; thirdly, the silicate in the produced water can be filtered through the high-temperature-resistant tubular filtering device, so that the damage of the recovered water to the boiler is avoided.
The invention relates to a high-temperature water recycling system for thickened oil steam flooding, which comprises a coarse filtering device, a circulating pool, a liquid pump and a high-temperature-resistant tubular membrane filtering device which are sequentially connected through a conveying pipeline; the sewage outlet of the high-temperature resistant tubular membrane filtering device is connected with the circulating tank through a return pipe, and the purified water outlet of the high-temperature resistant tubular membrane filtering device is connected with a water storage tank; the device comprises a coarse filtering device, a circulating pool, a liquid pump, a high-temperature-resistant tubular membrane filtering device, a control device, a sewage discharging pool and a cleaning device, wherein the coarse filtering device and the circulating pool are respectively connected with the sewage discharging pool through sewage discharging pipes; the conveying pipeline, the backflow pipeline, the filtering device, the circulating pool, the high-temperature tubular membrane filtering device and the water storage tank are all provided with heat preservation devices.
According to the further optimization of the technical scheme, the cleaning device comprises a medicine washing tank and a washing tank which are connected in parallel through a water conveying pipe; and the coarse filtering device and the circulating tank are respectively internally provided with a stirrer.
According to the further optimization of the technical scheme, a thermometer and a liquid level meter are arranged in the circulating pool; the water purification outlet of the high-temperature resistant tubular membrane filtering device is provided with a flowmeter, and the thermometer, the liquid level meter and the flowmeter are respectively electrically connected with the control device.
According to the technical scheme, the sealing rings at the connecting interfaces among the conveying pipelines, the devices and the conveying pipelines are all made of tetrafluoro gaskets or fluororubber.
According to the technical scheme, the pressure at the water inlet of the high-temperature-resistant tubular membrane filtering device is 0.22-0.31mpa in the filtering state, and the liquid pump is closed under the control of the control device when the pressure is greater than 0.31 mpa; when the pressure is less than 0.22mpa, the liquid pump is started.
The technical proposal of the invention is further optimized, and the water flow at the purified water outlet is 1.2-2.7m3H, when the yield of the purified water outlet is less than 1.2m3And when the pressure is over, the liquid pump is closed, and the cleaning device is started or oilfield produced water is injected into the circulation tank.
According to the further optimization of the technical scheme, the filtering precision of the coarse filtering device is not more than 0.3 mm; the filtering precision of the high-temperature resistant tubular membrane filtering device is 20-30 nm.
According to the technical scheme, the high-temperature-resistant tubular membrane filtering device is made of a high-temperature-resistant tubular microfiltration membrane, and a protective pad is arranged at the front section of a single tubular membrane and used for preventing the tubular membrane from shelling and leaking oil.
According to the technical scheme of the invention, the diameter of a pure water outlet of a single tubular membrane in the high-temperature resistant tubular membrane filtering device is not less than 2/3 of the diameter of the tubular membrane.
The recycling system for high-temperature water in thickened oil steam flooding recovery is applied to an oil field steam boiler system according to the technical scheme.
Drawings
The invention will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings.
FIG. 1 is a schematic flow diagram of a system for recycling high-temperature water in heavy oil steam flooding recovery according to the present invention.
FIG. 2 is a schematic illustration of a split configuration of a single tubular membrane front end in accordance with the present invention.
FIG. 3 is a side view of the protective pad of FIG. 2 according to the present invention.
In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.
Description of reference numerals: 1-a tubular membrane; 11-a channel tube; 2-protective pad; 21-a through hole; 22-protective tube.
Detailed Description
The invention will be further explained with reference to the drawings.
As shown in fig. 1, the system for recycling high-temperature water in thickened oil steam flooding recovery of the invention comprises a coarse filtration device, a circulation tank, a liquid pump and a high-temperature resistant tubular membrane filtration device which are sequentially connected through a delivery pipeline; the sewage outlet of the high-temperature-resistant tubular membrane filtering device is connected with the circulating pool through a return pipe, so that the oilfield produced water which does not pass through the filtering can be conveyed into the circulating pool for the next filtering; the purified water outlet of the high-temperature resistant tubular membrane filtering device is connected with the water storage tank, the filtered purified water is directly conveyed to the water storage tank for next-step reuse, and the coarse filtering device and the circulating tank are respectively provided with a stirrer.
The device comprises a circulating pool, a high-temperature tubular membrane filtering device, a control device, a sewage discharging pool and a cleaning device, wherein the coarse filtering device and the circulating pool are respectively connected with the sewage discharging pool through a sewage discharging pipe, large-particle impurities which do not pass through the coarse filtering device can be directly discharged into the sewage discharging pool for further treatment, and the circulating pool and the high-temperature tubular membrane filtering device are subjected to circulating filtration in the whole filtering process, so that after the concentration of impurities such as oil, suspended matters, organic matters, metal ions, silicates and the like in the circulating pool reaches a certain value (the concentration of a solution in the circulating pool can be indirectly judged through effluent water in a pure water outlet of a filtering membrane), the impurities in the circulating pool can be cleaned and discharged into a discharging pool for centralized treatment; the cleaning device is connected with a delivery pipeline between the liquid pump and the high-temperature-resistant tubular membrane filtering device through the three-way valve, the water inlet of the cleaning device is connected with the water purification outlet, when the water outlet speed of the water purification outlet of the high-temperature-resistant tubular membrane filtering device is lower than a certain value, water in the circulating pool can be suspended for filtration, and the delivery passage of the cleaning device is opened to clean the high-temperature-resistant tubular membrane filtering device.
The water recycling system of the technical proposal of the invention is mainly used in the field of thickened oil exploitation and is used for treating the oil field water which is just exploited, because the temperature of the mixture of oil, water and other impurities can reach about 90 degrees during mining due to the steam injected underground, the produced water with the temperature is directly treated, high-temperature water can be purified, the high-temperature water can be directly conveyed to a boiler for use, thereby greatly reducing the energy loss of reheating, and in order to reduce the heat energy loss to the minimum extent in the filtering process, the invention is provided with heat preservation devices on the conveying pipeline, the return pipeline, the filtering device, the circulating tank, the high-temperature tubular membrane filtering device and the water storage tank, particularly a heat preservation sponge, experiments prove that the heat energy loss can be reduced by 3-5% in the whole filtering process by adopting the heat preservation device.
Preferably, in the technical scheme of the invention, in order to better clean the high-temperature tubular membrane filtering device, the cleaning device is provided with a chemical washing tank and a washing tank which are connected in parallel, a three-step washing method is generally adopted in the using process, firstly, the tubular membrane is washed by the washing tank with clean water, and solid particulate matters stuck on the support frame and the membrane are washed away; secondly, closing the washing tank, opening the medicine washing tank, and washing oil stains, organic substances, metal ions and the like on the tubular membrane; the medicine washing tank can be filled with cleaning substances such as chemical medicines, detergents and the like.
In order to better control the parameters of each link in the filtering process and achieve the filtering effect of safe quality guarantee in the process of circulating and filtering the oilfield produced water, a thermometer and a liquid level meter are arranged in a circulating pool; high temperature resistant tubular membrane filter equipment's clean water exit is provided with the flowmeter, the thermometer, level gauge and flowmeter are linked with controlling means electricity respectively, according to the liquid level count value in the circulation pond, can in time pour into new extraction water into in the circulation pond, and in time arrange the system problem when the temperature appears and descend the waiting change, in addition through setting up the flowmeter in tubular membrane clean water exit, can real time monitoring high temperature tubular membrane filter equipment's filtration rate, in time wash and the indirect concentration of monitoring extraction water in the circulation pond to filtration membrane.
Because the oil field produced water contains a large amount of hydrocarbons and alkene substances and has a great corrosion effect on silica gel and the like, the silica gel pad used in the pipeline structure and the tubular membrane pad is easy to corrode, and finally, the rubber is dropped to cause the whole system to be blocked, so that the sealing rings at the connecting joints between the conveying pipeline and each device and between the conveying pipelines are all made of tetrafluoro gaskets or fluororubber, the maintenance cost can be greatly reduced, and the water filtering efficiency is improved.
The implementation test of the technical scheme verifies that the pressure at the water inlet of the high-temperature-resistant tubular membrane filtering device is 0.22-0.31mpa in the filtering state, and when the pressure is greater than 0.31mpa, the membrane is easily damaged, so that the liquid pump needs to be closed under the control of the control device; and when the pressure is less than 0.22mpa, the liquid pump is started to continuously pump the produced water from the circulating pool for filtering.
In the specific implementation process, the water production flow at the purified water outlet is 1.2-2.7m3H, when the output of the purified water outlet is less than 1.2m3At/h, two cases can be illustrated: firstly, the concentration of produced water in the circulating pool is too high, need the blowdown or pour into new oil field produced water into, secondly tubular membrane has taken place to block up or the greasy dirt adhesion is comparatively serious, needs wash, so need close this moment the drawing liquid pump, start belt cleaning device or combine the numerical value of level gauge to carry out the injection of oil field produced water into, perhaps pour into new oil field produced water into again after carrying out the blowdown. The high-temperature water recycling system for thickened oil steam flooding recovery mainly adopts twice filtration, the first step of coarse filtration is to filter large granular substances in oil field recovery water, and then the coarse filtration is carried out in a circulating pool, and the filtration precision of a specific coarse filtration device is not more than 0.3mm, preferably 0.2mm and 0.28 mm; the filtering precision of the high-temperature resistant tubular membrane filtering device is 20-30nm, the filtering membrane adopted in the technical scheme of the invention is a membrane produced by the technology CN201610836315.9 or a large-scale tubular membrane module produced by Tianjin Haipule membrane technology company Limited, and the high-temperature resistant tubular membrane filtering device is made of a high-temperature resistant tubular microfiltration membrane.
The technical scheme of the invention combines the problems of practical experiment operation in oil fields, and also improves the tubular membrane in the high-temperature tubular membrane filtering device, particularly, a protective pad 2 is arranged at the front section of a single tubular membrane 1, the protective pad 2 is used for preventing the tubular membrane from shelling and leaking oil, the protective pad 2 can be made of stainless steel materials or copper materials, the protective pad 2 comprises a body, through holes 21 matched with a channel pipe 11 in the tubular membrane 1 are arranged on the body, a protective pipe 22 with the thickness of 0.5-2mm extends from one side of each through hole 21, the design mainly protects the end part of a tubular membrane supporting frame to prevent the occurrence of shelling of the membrane tube, and the water yield is too large to exceed expectation in the process of using the system to circularly filter produced water in the oil fields, the water outlet side of the tubular membrane cannot be timely discharged, back pressure is generated, so that the membrane tube is often shelled, the concentrated water flows backwards into the water producing side, backflow can be prevented through the design of the cover, and meanwhile, the technical scheme of the invention also expands a single tubular membrane purified water outlet in the high-temperature resistant tubular membrane filtering device, specifically 2/3 with the diameter of the outlet of the purified water outlet not smaller than the diameter of the tubular membrane.
The technical scheme of the invention is mainly applied to water recycling of a steam boiler in an oil field, and because a large amount of steam is required to be filled underground in the process of thick oil steam flooding exploitation, oil in the deep part of a stratum is melted and then is output together, a large amount of water is required to be heated in the process, and a large amount of fuel is required while water resources are required, high-temperature water of produced water in an oil well can be directly filtered and recycled through the system, the fuel is greatly saved under the condition of not damaging the filtering, the temperature of the produced water input in the system is between 80 and 90 ℃, the temperature of the output water is about 75 ℃, the output clean water is directly conveyed to the boiler, the fuel is saved, and meanwhile, the output efficiency of the steam is also improved.
The specific implementation process of the technical scheme of the invention in the process of thickened oil steam flooding exploitation in the oil field comprises the following steps: stirring a high-temperature oil-water mixture extracted from an oil field by a stirrer in a coarse filtering device (the oil extraction process after extraction is not repeated in the prior art), introducing the oil mixture into a circulating tank through the coarse filtering device, arranging a drain outlet on the coarse filtering device, discharging large granular impurities subjected to coarse filtering into the drain tank at any time through a control method, conveying the produced water in the circulating tank to a high-temperature tubular membrane filtering device through a liquid pump for filtering, controlling the water pumping speed of the liquid pump by monitoring the water pressure at the high-temperature tubular membrane filtering device, keeping the water pressure at the high-temperature tubular membrane filtering device at 0.22-0.31mpa, discharging the purified water filtered in the high-temperature tubular membrane filtering device into a water storage tank through a water purifying port or directly conveying the purified water into a boiler, conveying part of water into a flushing tank, and conveying the produced water which does not pass through the filtering membrane into the circulating tank again, filtering again after stirring; during the process, the content of the produced water and the concentration of the liquid in the circulating tank can be continuously monitored, when the produced water reaches a certain concentration, sewage is discharged, and meanwhile, the water quality of the filtered water in the purified water outlet can be periodically checked in a sampling mode so as to monitor the filtering effect and the existence of faults in the filtering device; when the concentration of water in the circulating pool is in a normal range, if the pure water filtering amount of a pure water outlet is low, starting a cleaning device (the period is generally 13-15 days), and cleaning the high-temperature-resistant tubular membrane filtering device by adopting a three-step method.
While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims (10)

1. A high-temperature water recycling system in thickened oil steam flooding is characterized by comprising a coarse filtering device, a circulating pool, a liquid pump and a high-temperature-resistant tubular membrane filtering device which are sequentially connected through a conveying pipeline; the sewage outlet of the high-temperature resistant tubular membrane filtering device is connected with the circulating tank through a return pipe, and the purified water outlet of the high-temperature resistant tubular membrane filtering device is connected with a water storage tank;
the device comprises a coarse filtering device, a circulating pool, a liquid pump, a high-temperature-resistant tubular membrane filtering device, a control device, a sewage discharging pool and a cleaning device, wherein the coarse filtering device and the circulating pool are respectively connected with the sewage discharging pool through sewage discharging pipes;
the conveying pipeline, the backflow pipeline, the filtering device, the circulating pool, the high-temperature tubular membrane filtering device and the water storage tank are all provided with heat preservation devices.
2. The system for recycling high-temperature water in thickened oil steam flooding according to claim 1, wherein the cleaning device comprises a chemical washing tank and a washing tank which are connected in parallel through a water conveying pipe; and the coarse filtering device and the circulating tank are respectively internally provided with a stirrer.
3. The system for recycling high-temperature water in thickened oil steam flooding according to claim 1, characterized in that a thermometer and a liquid level meter are arranged in the circulation tank; the water purification outlet of the high-temperature resistant tubular membrane filtering device is provided with a flowmeter, and the thermometer, the liquid level meter and the flowmeter are respectively electrically connected with the control device.
4. The system for recycling high-temperature water in thickened oil steam flooding recovery according to any one of claims 1 to 3, wherein sealing rings at the connecting interfaces between the conveying pipeline and each device and between the conveying pipelines are made of tetrafluoro gaskets or fluororubber.
5. The system for recycling high-temperature water in thickened oil steam flooding according to claim 3, wherein in a filtering state, the pressure at the water inlet of the high-temperature-resistant tubular membrane filtering device is 0.22-0.31mpa, and when the pressure is greater than 0.31mpa, the liquid pump is closed under the control of the control device; when the pressure is less than 0.22mpa, the liquid pump is started.
6. The system for recycling high-temperature water in thickened oil steam flooding according to claim 5, wherein the water production flow at the clean water outlet is 1.2-2.7m3H, when the yield of the purified water outlet is less than 1.2m3And closing the liquid pump at the time of/h.
7. The high-temperature water recycling system in thickened oil steam flooding recovery according to any one of claims 1 to 3 or 5 to 6, wherein the filtration precision of the coarse filtration device is not more than 0.3 mm; the filtering precision of the high-temperature resistant tubular membrane filtering device is 20-30 nm.
8. The system for recycling high-temperature water in thickened oil steam flooding as claimed in claim 7, wherein the high-temperature resistant tubular membrane filtering device is made of a high-temperature resistant tubular micro-filtration membrane, and a protective pad is arranged at the front section of the single tubular membrane, and is used for preventing the tubular membrane from shelling and leaking oil.
9. The system for recycling high-temperature water in thickened oil steam flooding according to claim 7, wherein the diameter of a single tubular membrane clean water outlet in the high-temperature resistant tubular membrane filtering device is not less than 2/3 of the diameter of the tubular membrane.
10. Use of a system for recycling high temperature water in heavy oil steam flooding according to any one of claims 1 to 9 in a steam boiler system of an oil field.
CN202010247418.8A 2020-03-31 2020-03-31 Tubular membrane recycling system for hot water in thickened oil steam flooding and boiler application Withdrawn CN111318168A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202010247418.8A CN111318168A (en) 2020-03-31 2020-03-31 Tubular membrane recycling system for hot water in thickened oil steam flooding and boiler application
CN202010997932.3A CN111871210B (en) 2020-03-31 2020-09-21 Tubular membrane recycling system, method and application of hot water in thickened oil steam flooding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010247418.8A CN111318168A (en) 2020-03-31 2020-03-31 Tubular membrane recycling system for hot water in thickened oil steam flooding and boiler application

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CN111318168A true CN111318168A (en) 2020-06-23

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CN2403480Y (en) * 1999-12-18 2000-11-01 张大川 Cross flow sieve filter for sewage containing oil
CN1562814A (en) * 2004-04-16 2005-01-12 辽河石油勘探局 Technique for feeding water to boiler of reclaiming heat from treating sewage of thick oil
CN102139969B (en) * 2011-05-11 2012-10-10 上海膜达克环保工程有限公司 Emulsified oil waste water treatment system and process
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CN203307152U (en) * 2013-06-17 2013-11-27 北京联众华禹环保科技有限公司 Produced water treatment and recycling system for oil and gas field
CN203845890U (en) * 2014-04-29 2014-09-24 北京机电院高技术股份有限公司 Thickened oil sewage recycling steam-injection boiler treatment system

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Application publication date: 20200623