CN111320336A - Remote shale gas single-well skid-mounted produced water treatment system and method - Google Patents
Remote shale gas single-well skid-mounted produced water treatment system and method Download PDFInfo
- Publication number
- CN111320336A CN111320336A CN202010269793.2A CN202010269793A CN111320336A CN 111320336 A CN111320336 A CN 111320336A CN 202010269793 A CN202010269793 A CN 202010269793A CN 111320336 A CN111320336 A CN 111320336A
- Authority
- CN
- China
- Prior art keywords
- tank
- water
- produced water
- shale gas
- temporary storage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—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
- C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
-
- 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
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
-
- 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
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- 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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1268—Membrane bioreactor systems
-
- 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
- C02F3/30—Aerobic and anaerobic processes
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention provides a remote shale gas single-well skid-mounted produced water treatment system and method, and solves the technical problems that in the prior art, the remote shale gas single-well produced water treatment cost is high, and the produced water transportation process is high in safety and environmental protection risks. The treatment system comprises a homogenizing tank, an advanced oxidation tank, a sedimentation tank, an anaerobic tank, a facultative tank, an aerobic tank, an MBR membrane tank, a backflushing temporary storage tank and a clear water temporary storage tank which are sequentially connected through pipelines along the flow direction of water treatment; wherein the homogenizing pool is connected with a produced water inlet pipe; a reverse discharge pipe is connected between the reverse reaction temporary storage tank and the sedimentation tank; and the clear water temporary storage pool is connected with a clear water drain pipe. The method reduces the cost for treating the produced water of the remote shale gas single well, and avoids the potential safety and environmental protection hazards in the process of transferring the produced water.
Description
Technical Field
The invention relates to a water treatment system, in particular to a remote shale gas single-well skid-mounted produced water treatment system and method.
Background
In the shale gas exploitation process, hydraulic fracturing is one of necessary means in order to improve exploitation efficiency. However, this inevitably produces a large amount of mining waste liquid, and if the mining waste liquid is not effectively treated and is undesirably discharged, the surrounding environment is inevitably damaged. With the national emphasis on environmental problems and the perfection of related laws, the harmless treatment of the shale gas produced water is urgently needed.
The main pollutants of the produced water of the shale gas field comprise guanidine gum, bactericide, petroleum and other additives, and the added additives cause the COD, ammonia nitrogen, chemical stability and TDS of the produced liquid to be generally higher, and the produced water can seriously pollute the surrounding environment if the produced water is directly discharged without subsequent treatment.
Meanwhile, as the scale of shale gas exploration and development is continuously enlarged, shale gas exploration wells deployed in regions are continuously increased, the remote shale gas exploration wells are distributed in a dispersed mode, a large amount of produced water begins to be produced when fracturing construction of a single shale gas well is completed and gas testing and production are started, and produced water recycling wells and produced water centralized treatment stations are not usually arranged near the remote shale gas single well.
The applicant has found that the prior art has at least the following technical problems:
in the prior art, the treatment cost of the far shale gas single-well produced water is high, and the risk of safety and environmental protection in the process of transferring the produced water is high.
Disclosure of Invention
The invention aims to provide a remote shale gas single-well skid-mounted produced water treatment system and method, and aims to solve the technical problems that in the prior art, the remote shale gas single-well produced water treatment cost is high, and the produced water transportation process is safe and environment-friendly and has high risk. The technical effects that can be produced by the preferred technical scheme in the technical schemes provided by the invention are described in detail in the following.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides a remote shale gas single-well skid-mounted produced water treatment system which comprises a homogenizing tank, an advanced oxidation tank, a sedimentation tank, an anaerobic tank, a facultative tank, an aerobic tank, an MBR membrane tank, a back-flushing temporary storage tank and a clear water temporary storage tank which are sequentially connected through pipelines along the flow direction of water treatment; wherein the content of the first and second substances,
the homogenizing pool is connected with a produced water inlet pipe;
a reverse discharge pipe is connected between the reverse reaction temporary storage tank and the sedimentation tank;
and the clear water temporary storage pool is connected with a clear water drain pipe.
Further, the homogenizing tank comprises a water quantity adjusting tank and a water quality adjusting tank which are sequentially arranged along the flow direction of the water treatment.
Further, the sedimentation tank comprises an inclined plate sedimentation tank and a flocculation sedimentation tank which are sequentially arranged along the flow direction of water treatment, and a flocculation air flotation machine is arranged in the flocculation sedimentation tank; the reverse discharge pipe is connected between the flocculation sedimentation tank and the reverse buffer temporary storage tank.
Further, an internal circulation stirring pump is arranged at the front half section of the MBR membrane tank; the second half section of the MBR membrane tank is provided with an MBR membrane system.
Further, still include the sludge impoundment, the sludge impoundment sets up in the position that is close to the flocculation and precipitation pond, and is provided with the sludge pipe of discharging mud between flocculation and precipitation pond and sludge impoundment.
Furthermore, a pipeline between the water quality adjusting tank and the advanced oxidation tank is connected with a first suction type corrosion-resistant pump; and a second suction type corrosion-resistant pump is connected to a pipeline between the aerobic tank and the MBR membrane tank.
The invention provides a method for treating remote shale gas single-well skid-mounted produced water, which is used for treating the remote shale gas single-well skid-mounted produced water by applying the water treatment system.
Further, the method comprises the following steps:
(1) the produced water is treated by a homogenizing tank, an advanced oxidation tank, a sedimentation tank, an anaerobic tank, a facultative tank, an aerobic tank and an MBR membrane tank in sequence;
(2) the effluent of the MBR membrane tank enters a backflushing temporary storage tank, and the quality of the effluent of the MBR membrane tank is detected to obtain a water quality detection result;
(3) if the water quality detection result in the step (2) reaches the standard, discharging the water into a clear water temporary storage tank to wait for discharging; and (3) if the water quality detection result in the step (2) does not reach the standard, discharging the water into the sedimentation tank through the reverse discharge pipe, and treating the water again through the sedimentation tank, the anaerobic tank, the facultative tank, the aerobic tank and the MBR membrane tank until the water quality reaches the standard.
Further, in the step (1), the high-grade oxidation pond takes ferrate as a main treatment agent, and the adding amount of the ferrate is 4L-8L per ton of produced water.
Further, in the step (1), the adding agent of the flocculation sedimentation tank in the sedimentation tank is a gel breaker, PAC, PAM, NaHCO3And HCL; breakers, PAC, PAM, NaHCO3And the addition amount of HCL is respectively as follows: 1.0-1.4g of gel breaker per ton of produced water, 22-33g of PAC per ton of produced water, 0.3-0.5g of PAM per ton of produced water, and NaHCO per ton of produced water31.8-2.5 g/ton produced water, and adding HCL according to the PH variation, so that the PH of the flocculation sedimentation tank is controlled at 7-9.
Further, in the step (1), the added agents of the MBR membrane tank are citric acid and disinfectant.
Based on the above technical solution, the present embodiment can at least produce the following technical effects:
the remote single shale gas well skid-mounted produced water treatment system and method provided by the invention have the advantages that the system is arranged at the remote single shale gas well, the produced water can be directly treated at a production place, the treatment effect is good, the remote single shale gas well skid-mounted produced water does not need to be transported to a shale gas fracturing site hundreds of kilometers away for a long distance by a tank car or to be treated up to the standard by a produced water centralized treatment station hundreds of kilometers away, the treatment cost of the remote single shale gas well produced water is reduced, and the potential safety and environmental protection hazards in the process of transferring the produced water are avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural view of embodiment 1 of the present invention.
In the figure: 1. a water quantity adjusting tank; 2. a water quality adjusting tank; 3. an advanced oxidation pond; 4. a sloping plate sedimentation tank; 5. a flocculation sedimentation tank; 6. an anaerobic tank; 7. a facultative tank; 7. an aerobic tank; 8. an MBR membrane tank; 9. a backflushing temporary storage pool; 10. a clear water temporary storage pool; 11. a produced water inlet pipe; 12. reversely discharging the tubes; 13. a clear water drain pipe; 14. a sludge tank; 15. a sludge pipe; 16. an internal circulation stirring pump; 17. MBR membrane system; 18. a suction type corrosion-resistant pump I; 19. and a second suction type corrosion-resistant pump.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
As shown in fig. 1:
example 1:
the boundary shale gas single-well skid-mounted produced water treatment system provided by the invention is installed in a Penge 5 well of a shale gas well at the project part of shale gas in south China oil and gas division, China petrochemical industry, Inc., and is sequentially installed along the flow direction of water treatment: a homogenizing tank, an advanced oxidation tank, a sedimentation tank, an anaerobic tank, a facultative tank, an aerobic tank, an MBR membrane tank, a backflushing temporary storage tank and a clear water temporary storage tank which are connected through pipelines; wherein the content of the first and second substances,
the homogenizing pool is connected with a produced water inlet pipe;
a reverse discharge pipe is connected between the reverse reaction temporary storage tank and the sedimentation tank;
and the clear water temporary storage pool is connected with a clear water drain pipe.
As an alternative embodiment, the homogenizing tank comprises a water quantity adjusting tank and a water quality adjusting tank which are arranged in sequence along the flow direction of the water treatment. Because the concentration fluctuation of the produced water is large, and the water quality is not uniform, the produced water needs to be homogenized and adjusted before treatment so as to facilitate subsequent water treatment, the water quantity adjusting tank can homogenize and adjust the water quality and the water quantity of the produced water, and the water quality adjusting tank can accurately correct the water quality of the produced water.
As an alternative embodiment, the sedimentation tank comprises an inclined plate sedimentation tank and a flocculation sedimentation tank which are arranged in sequence along the flow direction of the water treatment; the reverse discharge pipe is connected between the flocculation sedimentation tank and the reverse buffer temporary storage tank.
As an optional implementation mode, a flocculation air flotation machine is arranged in the flocculation sedimentation tank.
As an optional embodiment, the sewage treatment device further comprises a sludge tank, wherein the sludge tank is arranged at a position close to the flocculation sedimentation tank, and a sludge pipe for discharging sludge is arranged between the flocculation sedimentation tank and the sludge tank.
Because the advanced oxidation pond effluent contains a large amount of suspended flocculates, then set up the inclined plate sedimentation tank earlier, make it subside solid-liquid separation, set up the flocculation sedimentation tank again, through flocculation air supporting machine, throw the medicament and react in flocculation air supporting machine anterior segment reaction zone after, the separation is flocculated once more, upper strata dross is arranged to the sludge impoundment and is kept in, the mud of regularly discharging of sinking mud is to the sludge impoundment, flocculation sedimentation tank effluent can then get into anaerobic tank, facultative tank, good oxygen pond in order and handle.
As an optional implementation mode, a first suction type corrosion-resistant pump is connected to a pipeline between the water quality adjusting tank and the advanced oxidation tank. And the first suction type corrosion-resistant pump is used for pumping water in the water quality regulating tank into the advanced oxidation tank.
As an optional implementation mode, a second suction type corrosion-resistant pump is connected to a pipeline between the aerobic tank and the MBR membrane tank. And the second suction type corrosion-resistant pump is used for pumping the water in the aerobic tank into the MBR membrane tank.
As an optional embodiment, the front half section of the MBR membrane tank is provided with an internal circulation stirring pump for denitrification; and an MBR membrane system is arranged at the rear half section of the MBR membrane tank for further treating the produced water.
As an optional implementation mode, the added agent of the advanced oxidation pond is ferrate, and is configured into a ferrate solution through an electrolytic oxidation device, and the adding amount of the ferrate solution is 4-8L/ton of produced water; wherein the content of the first and second substances,
the ferrate solution is prepared from potassium ferrate, sodium ferrate and water; in the ferrate solution, the concentration of potassium ferrate was 0.05g/L and the concentration of sodium ferrate was 0.05 g/L.
As an optional implementation mode, the adding agents of the flocculation sedimentation tank in the sedimentation tank are gel breakers, PAC, PAM and NaHCO3And HCL; breakers, PAC, PAM, NaHCO3And the addition amount of HCL is respectively as follows: 1.0-1.4g of gel breaker per ton of produced water, 22-33g of PAC per ton of produced water, 0.3-0.5g of PAM per ton of produced water, and NaHCO per ton of produced water31.8-2.5 g/ton produced water, and adding HCL according to the PH variation, so that the PH of the flocculation sedimentation tank is controlled at 7-9.
As an optional implementation mode, the MBR membrane tank needs to be periodically cleaned, the agents adopted for cleaning are citric acid and disinfectant, the two agents are added in the mode of periodic cleaning of the MBR membrane tank, and the consumption of the citric acid and the consumption of the disinfectant are 25-30 kg/week.
As an optional implementation mode, the added agent of the back flushing temporary storage pool is ferrate, the ferrate solution is prepared by an electrolytic oxidation device, and the adding amount of the ferrate solution is 1.1-1.5L/ton of produced water. The dosage of the added medicament is carried out according to the COD amount in the water quality actually detected; wherein the content of the first and second substances,
the ferrate solution is prepared from potassium ferrate, sodium ferrate and water; in the ferrate solution, the concentration of potassium ferrate was 0.05g/L and the concentration of sodium ferrate was 0.05 g/L.
The water treatment of the remote shale gas single-well skid-mounted produced water treatment system comprises the following steps:
(1) the produced water is treated by a homogenizing tank, an advanced oxidation tank, a sedimentation tank, an anaerobic tank, a facultative tank, an aerobic tank and an MBR membrane tank in sequence;
(2) the effluent of the MBR membrane tank enters a backflushing temporary storage tank, and the quality of the effluent of the MBR membrane tank is detected to obtain a water quality detection result;
(3) if the water quality detection result in the step (2) reaches the standard, discharging the water into a clear water temporary storage tank to wait for discharging; and (3) if the water quality detection result in the step (2) does not reach the standard, discharging the water into the sedimentation tank through the reverse discharge pipe, and treating the water again through the sedimentation tank, the anaerobic tank, the facultative tank, the aerobic tank and the MBR membrane tank until the water quality reaches the standard.
In the following examples 2-6, the ferrate solution was configured:
the ferrate solution is prepared from potassium ferrate, sodium ferrate and water; in the ferrate solution, the concentration of potassium ferrate was 0.05g/L and the concentration of sodium ferrate was 0.05 g/L.
Example 2:
the remote shale gas single-well skid-mounted produced water treatment system in the embodiment 1 is applied to water treatment, and the water treatment method comprises the following steps:
(1) the produced water is treated by a water quantity regulating tank, a water quality regulating tank, an advanced oxidation tank, an inclined plate sedimentation tank, a flocculation sedimentation tank, an anaerobic tank, a facultative tank, an aerobic tank and an MBR membrane tank in sequence; wherein the content of the first and second substances,
the adding amount of the traditional Chinese medicine in the advanced oxidation pond, the flocculation sedimentation pond and the back flushing temporary storage pond is shown in the following table 1,
the HRT of the anaerobic tank is 13h, and halotolerant bacteria are added; during initial feeding, the salt tolerant bacteria strain is 5kg, and then the salt tolerant bacteria strain is independently amplified and cultured until the concentration of the salt tolerant bacteria strain fed into the pond reaches 500 mg/L;
the HRT of the facultative tank is 7.2h, the reflux ratio is 200 percent, and halotolerant bacteria are added; during initial feeding, the salt tolerant bacteria strain is 5kg, and then the salt tolerant bacteria strain is independently amplified and cultured until the concentration of the salt tolerant bacteria strain fed into the pond reaches 500 mg/L;
the HRT of the aerobic tank is 30h, the reflux ratio is 100%, and halotolerant bacteria are added; during initial feeding, the salt tolerant bacteria strain is 5kg, and then the salt tolerant bacteria strain is independently amplified and cultured until the concentration of the salt tolerant bacteria strain fed into the pond reaches 500 mg/L;
(2) the effluent of the MBR membrane tank enters a backflushing temporary storage tank, the quality of the effluent of the MBR membrane tank is detected, a water quality detection result is obtained, and the detection result is shown in the following table 3;
(3) and (3) if the water quality detection result in the step (2) is up to the standard, discharging the water into a clear water temporary storage tank to wait for discharging.
Example 3:
the remote shale gas single-well skid-mounted produced water treatment system in the embodiment 1 is applied to water treatment, and the water treatment method comprises the following steps:
(1) the produced water is treated by a water quantity regulating tank, a water quality regulating tank, an advanced oxidation tank, an inclined plate sedimentation tank, a flocculation sedimentation tank, an anaerobic tank, a facultative tank, an aerobic tank and an MBR membrane tank in sequence; wherein the content of the first and second substances,
the adding amount of the traditional Chinese medicine in the advanced oxidation pond, the flocculation sedimentation pond and the back flushing temporary storage pond is shown in the following table 1,
the HRT of the anaerobic tank is 13h, and halotolerant bacteria are added; during initial feeding, the salt tolerant bacteria strain is 5kg, and then the salt tolerant bacteria strain is independently amplified and cultured until the concentration of the salt tolerant bacteria strain fed into the pond reaches 500 mg/L;
the HRT of the facultative tank is 7.2h, the reflux ratio is 200 percent, and halotolerant bacteria are added; during initial feeding, the salt tolerant bacteria strain is 5kg, and then the salt tolerant bacteria strain is independently amplified and cultured until the concentration of the salt tolerant bacteria strain fed into the pond reaches 500 mg/L;
the HRT of the aerobic tank is 30h, the reflux ratio is 100%, and halotolerant bacteria are added; during initial feeding, the salt tolerant bacteria strain is 5kg, and then the salt tolerant bacteria strain is independently amplified and cultured until the concentration of the salt tolerant bacteria strain fed into the pond reaches 500 mg/L;
(2) the effluent of the MBR membrane tank enters a backflushing temporary storage tank, the quality of the effluent of the MBR membrane tank is detected, a water quality detection result is obtained, and the detection result is shown in the following table 3;
(3) if the water quality detection result in the step (2) does not reach the standard, discharging the water into a sedimentation tank through a reverse discharge pipe for secondary treatment, treating the water through the sedimentation tank, an anaerobic tank, a facultative tank, an aerobic tank and an MBR membrane tank in sequence, and then feeding the effluent of the BR membrane tank into a reverse flushing temporary storage tank;
(4) detecting the quality of the effluent of the MBR membrane tank subjected to secondary treatment to obtain a water quality detection result, wherein the detection result is shown in the following table 3;
(5) and (4) if the water quality detection result in the step (4) is up to the standard, discharging the water into a clear water temporary storage tank to wait for discharging.
Example 4:
the remote shale gas single-well skid-mounted produced water treatment system in the embodiment 1 is applied to water treatment, and the water treatment method comprises the following steps:
(1) the produced water is treated by a water quantity regulating tank, a water quality regulating tank, an advanced oxidation tank, an inclined plate sedimentation tank, a flocculation sedimentation tank, an anaerobic tank, a facultative tank, an aerobic tank and an MBR membrane tank in sequence; wherein the content of the first and second substances,
the adding amount of the traditional Chinese medicine in the advanced oxidation pond, the flocculation sedimentation pond and the back flushing temporary storage pond is shown in the following table 1,
the HRT of the anaerobic tank is 13h, and halotolerant bacteria are added; during initial feeding, the salt tolerant bacteria strain is 5kg, and then the salt tolerant bacteria strain is independently amplified and cultured until the concentration of the salt tolerant bacteria strain fed into the pond reaches 500 mg/L;
the HRT of the facultative tank is 7.2h, the reflux ratio is 200 percent, and halotolerant bacteria are added; during initial feeding, the salt tolerant bacteria strain is 5kg, and then the salt tolerant bacteria strain is independently amplified and cultured until the concentration of the salt tolerant bacteria strain fed into the pond reaches 500 mg/L;
the HRT of the aerobic tank is 30h, the reflux ratio is 100%, and halotolerant bacteria are added; during initial feeding, the salt tolerant bacteria strain is 5kg, and then the salt tolerant bacteria strain is independently amplified and cultured until the concentration of the salt tolerant bacteria strain fed into the pond reaches 500 mg/L;
(2) the effluent of the MBR membrane tank enters a backflushing temporary storage tank, the quality of the effluent of the MBR membrane tank is detected, a water quality detection result is obtained, and the detection result is shown in the following table 3;
(3) if the water quality detection result in the step (2) does not reach the standard, discharging the water into a sedimentation tank through a reverse discharge pipe for secondary treatment, treating the water through the sedimentation tank, an anaerobic tank, a facultative tank, an aerobic tank and an MBR membrane tank in sequence, and then discharging the water from the MBR membrane tank into a reverse buffer temporary storage tank;
(4) detecting the quality of the effluent of the MBR membrane tank subjected to secondary treatment to obtain a water quality detection result, wherein the detection result is shown in the following table 3;
(5) and (4) if the water quality detection result in the step (4) is up to the standard, discharging the water into a clear water temporary storage tank to wait for discharging.
Example 5:
the remote shale gas single-well skid-mounted produced water treatment system in the embodiment 1 is applied to water treatment, and the water treatment method comprises the following steps:
(1) the produced water is treated by a water quantity regulating tank, a water quality regulating tank, an advanced oxidation tank, an inclined plate sedimentation tank, a flocculation sedimentation tank, an anaerobic tank, a facultative tank, an aerobic tank and an MBR membrane tank in sequence; wherein the content of the first and second substances,
the adding amount of the traditional Chinese medicine in the advanced oxidation pond, the flocculation sedimentation pond and the back flushing temporary storage pond is shown in the following table 1,
the HRT of the anaerobic tank is 13h, and halotolerant bacteria are added; during initial feeding, the salt tolerant bacteria strain is 5kg, and then the salt tolerant bacteria strain is independently amplified and cultured until the concentration of the salt tolerant bacteria strain fed into the pond reaches 500 mg/L;
the HRT of the facultative tank is 7.2h, the reflux ratio is 200 percent, and halotolerant bacteria are added; during initial feeding, the salt tolerant bacteria strain is 5kg, and then the salt tolerant bacteria strain is independently amplified and cultured until the concentration of the salt tolerant bacteria strain fed into the pond reaches 500 mg/L;
the HRT of the aerobic tank is 30h, the reflux ratio is 100%, and halotolerant bacteria are added; during initial feeding, the salt tolerant bacteria strain is 5kg, and then the salt tolerant bacteria strain is independently amplified and cultured until the concentration of the salt tolerant bacteria strain fed into the pond reaches 500 mg/L;
(2) the effluent of the MBR membrane tank enters a backflushing temporary storage tank, the quality of the effluent of the MBR membrane tank is detected, a water quality detection result is obtained, and the detection result is shown in the following table 3;
(3) and (3) if the water quality detection result in the step (2) is up to the standard, discharging the water into a clear water temporary storage tank to wait for discharging.
Example 6:
the remote shale gas single-well skid-mounted produced water treatment system in the embodiment 1 is applied to water treatment, and the water treatment method comprises the following steps:
(1) the produced water is treated by a water quantity regulating tank, a water quality regulating tank, an advanced oxidation tank, an inclined plate sedimentation tank, a flocculation sedimentation tank, an anaerobic tank, a facultative tank, an aerobic tank and an MBR membrane tank in sequence; wherein the content of the first and second substances,
the adding amount of the traditional Chinese medicine in the advanced oxidation pond, the flocculation sedimentation pond and the back flushing temporary storage pond is shown in the following table 1,
the HRT of the anaerobic tank is 13h, and halotolerant bacteria are added; during initial feeding, the salt tolerant bacteria strain is 5kg, and then the salt tolerant bacteria strain is independently amplified and cultured until the concentration of the salt tolerant bacteria strain fed into the pond reaches 500 mg/L;
the HRT of the facultative tank is 7.2h, the reflux ratio is 200 percent, and halotolerant bacteria are added; during initial feeding, the salt tolerant bacteria strain is 5kg, and then the salt tolerant bacteria strain is independently amplified and cultured until the concentration of the salt tolerant bacteria strain fed into the pond reaches 500 mg/L;
the HRT of the aerobic tank is 30h, the reflux ratio is 100%, and halotolerant bacteria are added; during initial feeding, the salt tolerant bacteria strain is 5kg, and then the salt tolerant bacteria strain is independently amplified and cultured until the concentration of the salt tolerant bacteria strain fed into the pond reaches 500 mg/L;
(2) the effluent of the MBR membrane tank enters a backflushing temporary storage tank, the quality of the effluent of the MBR membrane tank is detected, a water quality detection result is obtained, and the detection result is shown in the following table 3;
(3) and (3) if the water quality detection result in the step (2) is up to the standard, discharging the water into a clear water temporary storage tank to wait for discharging.
Table 1 examples 2-6 dosage amounts
The water quality of the raw water (produced water) at 5-well swelling shale gas wells at the item part of shale gas in south china oil and gas branch of china petrochemical company limited is shown in the following table 2 (the values of the produced water in the following table 2 are the highest values):
TABLE 2 Pengpe 5-well raw water inflow water quality meter (unit mg/L)
The discharge standard after produced water treatment is as follows:
according to the national discharge standard and requirements for shale gas produced water treatment, the produced water after treatment reaches the first-class standard of Integrated wastewater discharge Standard (GB 8978-1996), and the effluent quality requirements are as follows in Table 3:
the produced water is treated by the steps in the embodiments 2 to 6 and then is subjected to water quality detection, and the detection results are as follows:
table 3 effluent quality testing results table
As can be seen from the above table 3, the shale gas single-well skid-mounted produced water treatment system and method in the invention meet the first-class standard of Integrated wastewater discharge Standard (GB 8978-1996).
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. The utility model provides a far away shale gas individual well sled dress ization produced water processing system which characterized in that: comprises a homogenizing tank, an advanced oxidation tank, a sedimentation tank, an anaerobic tank, a facultative tank, an aerobic tank, an MBR membrane tank, a backflushing temporary storage tank and a clear water temporary storage tank which are sequentially connected through pipelines along the flow direction of water treatment; wherein the content of the first and second substances,
the homogenizing pool is connected with a produced water inlet pipe;
a reverse discharge pipe is connected between the reverse reaction temporary storage tank and the sedimentation tank;
and the clear water temporary storage pool is connected with a clear water drain pipe.
2. The remote shale gas single well skid-mounted produced water treatment system of claim 1, wherein: the homogenizing tank comprises a water quantity regulating tank and a water quality regulating tank which are sequentially arranged along the flow direction of water treatment.
3. The remote shale gas single well skid-mounted produced water treatment system of claim 2, wherein: the sedimentation tank comprises an inclined plate sedimentation tank and a flocculation sedimentation tank which are sequentially arranged along the flow direction of water treatment, and a flocculation air flotation machine is arranged in the flocculation sedimentation tank; the reverse discharge pipe is connected between the flocculation sedimentation tank and the reverse buffer temporary storage tank.
4. The remote shale gas single well skid-mounted produced water treatment system of any one of claims 1-3, wherein: the front half section of the MBR membrane tank is provided with an internal circulation stirring pump; the second half section of the MBR membrane tank is provided with an MBR membrane system.
5. The remote shale gas single well skid-mounted produced water treatment system of claim 4, wherein: still include the sludge impoundment, the sludge impoundment sets up in the position that is close to the flocculation and precipitation pond, and is provided with the sludge pipe of discharging mud between flocculation and precipitation pond and sludge impoundment.
6. The remote shale gas single well skid-mounted produced water treatment system of claim 5, wherein: a pipeline between the water quality adjusting tank and the advanced oxidation tank is connected with a first suction type corrosion-resistant pump; and a second suction type corrosion-resistant pump is connected to a pipeline between the aerobic tank and the MBR membrane tank.
7. A method for treating remote shale gas single-well skid-mounted produced water is characterized by comprising the following steps: the water treatment system of any one of claims 1-6 is applied to the treatment of the remote shale gas single-well skid-mounted produced water.
8. The method for treating the remote shale gas single well skid-mounted produced water according to claim 7, wherein the method comprises the following steps: the method comprises the following steps:
(1) the produced water is treated by a homogenizing tank, an advanced oxidation tank, a sedimentation tank, an anaerobic tank, a facultative tank, an aerobic tank and an MBR membrane tank in sequence;
(2) the effluent of the MBR membrane tank enters a backflushing temporary storage tank, and the quality of the effluent of the MBR membrane tank is detected to obtain a water quality detection result;
(3) if the water quality detection result in the step (2) reaches the standard, discharging the water into a clear water temporary storage tank to wait for discharging; and (3) if the water quality detection result in the step (2) does not reach the standard, discharging the water into the sedimentation tank through the reverse discharge pipe, and treating the water again through the sedimentation tank, the anaerobic tank, the facultative tank, the aerobic tank and the MBR membrane tank until the water quality reaches the standard.
9. The method for treating the remote shale gas single well skid-mounted produced water according to claim 8, wherein the method comprises the following steps: in the step (1), the high-grade oxidation pond takes ferrate as a main treatment agent, and the adding amount of the ferrate is 4L-8L per ton of produced water.
10. The method for treating the remote shale gas single well skid-mounted produced water according to claim 8, wherein the method comprises the following steps: in the step (1), the flocculating and settling tank in the settling tank is added with a gel breaker, PAC, PAM and NaHCO3And HCL; breakers, PAC, PAM, NaHCO3And the addition amount of HCL is respectively as follows: 1.0-1.4g of gel breaker per ton of produced water, 22-33g of PAC per ton of produced water, 0.3-0.5g of PAM per ton of produced water, and NaHCO per ton of produced water31.8-2.5 g/ton produced water, and adding HCL according to the PH variation, so that the PH of the flocculation sedimentation tank is controlled at 7-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010269793.2A CN111320336A (en) | 2020-04-08 | 2020-04-08 | Remote shale gas single-well skid-mounted produced water treatment system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010269793.2A CN111320336A (en) | 2020-04-08 | 2020-04-08 | Remote shale gas single-well skid-mounted produced water treatment system and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111320336A true CN111320336A (en) | 2020-06-23 |
Family
ID=71164276
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010269793.2A Pending CN111320336A (en) | 2020-04-08 | 2020-04-08 | Remote shale gas single-well skid-mounted produced water treatment system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111320336A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112537847A (en) * | 2020-12-24 | 2021-03-23 | 中国石油工程建设有限公司 | Magnetic biochemical system and method suitable for shale gas fracturing flow-back fluid treatment |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2657072A1 (en) * | 2009-03-05 | 2010-09-05 | Lee L. Shafer | Waste water treatment method |
| CN204079714U (en) * | 2014-09-26 | 2015-01-07 | 海天水务集团股份公司 | A kind of combination unit making shale gas sewage radioactive substance purifying treatment |
| CN105523692A (en) * | 2016-01-29 | 2016-04-27 | 天津市振津石油天然气工程有限公司 | Biochemical treatment method for improving polymer-containing sewage matrix of oil field |
| CN205313336U (en) * | 2016-01-21 | 2016-06-15 | 北京奥友兴业科技发展有限公司 | Flowing back processing system is returned to multi -functional integrated oil field fracturing of sled dress formula |
| WO2017067161A1 (en) * | 2015-10-20 | 2017-04-27 | 波鹰(厦门)科技有限公司 | Treatment device and method for oil extraction wastewater |
| WO2018132426A1 (en) * | 2017-01-11 | 2018-07-19 | Veolia Water Solutions & Technologies Support | System and process for treating produced and frac flowback waters |
| CN109231619A (en) * | 2018-11-22 | 2019-01-18 | 东莞道汇环保科技股份有限公司 | A kind of processing system and technique of shale gas fracturing waste water |
| CN211972087U (en) * | 2020-04-08 | 2020-11-20 | 中国石油化工股份有限公司 | Remote shale gas single-well skid-mounted produced water treatment system |
-
2020
- 2020-04-08 CN CN202010269793.2A patent/CN111320336A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2657072A1 (en) * | 2009-03-05 | 2010-09-05 | Lee L. Shafer | Waste water treatment method |
| CN204079714U (en) * | 2014-09-26 | 2015-01-07 | 海天水务集团股份公司 | A kind of combination unit making shale gas sewage radioactive substance purifying treatment |
| WO2017067161A1 (en) * | 2015-10-20 | 2017-04-27 | 波鹰(厦门)科技有限公司 | Treatment device and method for oil extraction wastewater |
| CN205313336U (en) * | 2016-01-21 | 2016-06-15 | 北京奥友兴业科技发展有限公司 | Flowing back processing system is returned to multi -functional integrated oil field fracturing of sled dress formula |
| CN105523692A (en) * | 2016-01-29 | 2016-04-27 | 天津市振津石油天然气工程有限公司 | Biochemical treatment method for improving polymer-containing sewage matrix of oil field |
| WO2018132426A1 (en) * | 2017-01-11 | 2018-07-19 | Veolia Water Solutions & Technologies Support | System and process for treating produced and frac flowback waters |
| CN109231619A (en) * | 2018-11-22 | 2019-01-18 | 东莞道汇环保科技股份有限公司 | A kind of processing system and technique of shale gas fracturing waste water |
| CN211972087U (en) * | 2020-04-08 | 2020-11-20 | 中国石油化工股份有限公司 | Remote shale gas single-well skid-mounted produced water treatment system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112537847A (en) * | 2020-12-24 | 2021-03-23 | 中国石油工程建设有限公司 | Magnetic biochemical system and method suitable for shale gas fracturing flow-back fluid treatment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109721158B (en) | Device and method for treating late landfill leachate by using semi-shortcut nitrification/double anaerobic ammonia oxidation process | |
| CN112811719B (en) | Autotrophic denitrification treatment system and method for urban sewage | |
| CN103979750B (en) | Reactor for sewage treatment and phosphorus recovery and method for recovering phosphorus by using same | |
| CN102531170B (en) | Ecological pond system of water body circulation flow oxygenation | |
| CN105254134A (en) | Biological nitrogen removal combination device | |
| CN210736456U (en) | Treatment device for zero discharge of garbage leachate in garbage incineration power station | |
| CN102336483A (en) | Method and device for treating landfill leachate thick water | |
| CN102826695B (en) | Scheelite beneficiation wastewater treatment technique | |
| CN210367290U (en) | Shale gas drilling operation waste water does not fall to ground preprocessing device | |
| CN211972087U (en) | Remote shale gas single-well skid-mounted produced water treatment system | |
| CN111320336A (en) | Remote shale gas single-well skid-mounted produced water treatment system and method | |
| CN106587349B (en) | Treatment device for high-ammonia-nitrogen high-organic-matter corn deep processing wastewater | |
| CN105417705A (en) | Fracturing flowback fluid biological processing method based on BESI technology | |
| CN205368049U (en) | Sizing agent effluent treatment plant | |
| CN210505966U (en) | Anaerobic-aerobic high-efficiency treatment device for high-concentration formaldehyde wastewater | |
| CN205170616U (en) | Biological denitrogenation composite set | |
| CN110902822A (en) | Anoxic reactor capable of effectively improving denitrification effect | |
| CN202785898U (en) | Device for treating and recycling wastewater from processing of coal tar | |
| CN109896708A (en) | A kind of kitchen garbage, waste-water processing system | |
| CN106915865B (en) | High-concentration total nitrogen wastewater denitrification ABP process and equipment | |
| CN212102493U (en) | Advanced treatment system for supplementing water by using urban reclaimed water as circulating water of power plant | |
| CN209412023U (en) | A kind of water-jet loom advanced waste treatment system | |
| CN210711138U (en) | Pretreatment device for high-salt wastewater generated in process of preparing ethylene glycol from coal | |
| CN103304053A (en) | Treatment system for converting mine waste-rock dredging drainage water into production water | |
| CN203904153U (en) | Reaction device for sewage treatment and phosphorus recovery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |