CN105130069A - High-salt oil producing waste water treatment and recycling device - Google Patents
High-salt oil producing waste water treatment and recycling device Download PDFInfo
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Abstract
A high-salt oil producing waste water treatment and recycling device comprises a chemical decalcifying system, a membrane filtration system and a desalination system. The chemical decalcifying system comprises a decalcifying reaction pond, a settling pond and a clean-water pond, the membrane filtration system comprises a filtering membrane and a filtering water production pond, the desalination system comprises a desalination device, a concentrated solution outlet of the desalination device conducts discharging directly, and a dialyzate outlet of the desalination device is connected to a boiler. By means of the the high-salt oil producing waste water treatment and recycling device, membrane calcification can be eliminated, membrane blocking can be prevented, the indexes such as SS and turbidity of waste water are reduced, metal ions in the water are removed, the salt content is reduced, and the recovery rate of the oil producing waste water can reach 50%-65%.
Description
Technical field
The invention belongs to the field for the treatment of of water pollution of environmental engineering, more specifically refer to a kind of high salt oil production waste water process and recycling device thereof.
Background technology
Oil field extracted water is the sewage deviate from production treating processes of crude oil mainly.The process of oil field extracted water requires various ways according to discharge or reuse difference, as the feedwater of vapour generator or boiler, strictly will control the ion content of the easy fouling of calcium ion, magnesium ion etc. in water, the oleaginousness etc. in total mineralization, water.Utilize membrane separation technique to carry out desalting treatment to oil field extracted water, make the report producing the aspects such as water reuse recycle many.The principal pollutant index of oil field extracted water after general pre-treatment eliminates most oleaginousness and suspended substance is: calcium ion 200 ~ 3000mg/L, magnesium ion 20 ~ 500mg/L, sodium ion 200 ~ 8000mg/L, chlorion 200 ~ 10000mg/L, oil-containing 30 ~ 300mg/L and COD are 100 ~ 500mg/L.Calcium ion, magnesium ion, bicarbonate ion equal size is still very high, total hardness is too high, direct employing membrane separation technique carries out desalting treatment, the calcification of film and dirt is easily caused to block up, calcium carbonate is filled with in the hole of mould material, the materials such as magnesiumcarbonate, on the one hand the effluent quality of film is deteriorated, have a strong impact on the steady running of film processing system, the calcification of the opposing party's facial mask can make mould material become fragile, easy fracture of wire, cause the work-ing life of film by common more than 3 years, shorten to less than half a year, reduce the operation life of film, frequent replacing membrane module, infeasible economically.
Summary of the invention
The invention provides a kind of high salt oil production waste water process and recycling device thereof, its main purpose is to overcome the defect that oil field extracted water embrane method treating processes in prior art exists film calcification, dirt is blocked up seriously, cost is high.
The present invention adopts following technical scheme:
A kind of high salt oil production waste water process and recycling device thereof, comprise chemical decalcification system, membrane filtration system and desalination system;
Described chemical decalcification system is for removing calcium ions and magnesium ions, the reduction water hardness in oil extraction waste water, chemistry decalcification system comprises decalcification reaction tank, settling tank and clean water basin, the import of decalcification reaction tank connects the outlet of oil extraction waste water discharge water, the outlet of decalcification reaction tank connects the import of settling tank, the outlet of settling tank is connected with the import of clean water basin, the import of the outlet junctional membrane filtering system of clean water basin;
Described membrane filtration system is used for graininess Impurity removal in oil extraction waste water, membrane filtration system comprises filtering membrane and filters product pond, the import of described filtering membrane connects the outlet of clean water basin, the outlet of filtering membrane connects the import of filtering and producing pond, filters the import that the outlet of producing pond connects desalination system;
Described desalination system comprises a desalting plant, and the import of desalting plant connects the outlet that is produced from pond in ultrafiltration, and the concentrated solution outlet of desalting plant directly discharges, and the dialyzate outlet of desalting plant is connected to boiler.
Further, described decalcification reaction tank is also equipped with medicine system, and medicine system is provided with grug feeding jar and dosing pump, and grug feeding jar outlet connects the import of dosing pump, and dosing pump outlet connects decalcification reaction tank.
Further, an electrolytic system is also provided with between described chemical decalcification system and membrane filtration system, described electrolytic system is provided with working shaft and electrolysis machine or electric air floating device, the import of described working shaft connects the outlet of chemical decalcification system, described water supply pump outlet connects the import of electrolysis machine or electric air floating device, and the outlet of electrolysis machine or electric air floating device is connected with the import of membrane filtration system.
Further, described electrolysis machine is provided with power supply and electrolyzer, and the electrode in described electrolyzer is the one in graphite, titanium, iron, aluminium, zinc, copper, lead, nickel, molybdenum, chromium, alloy and nano-catalytic noble electrode.
Further, the top layer of described nano-catalytic noble electrode is coated with the metal oxide inertia catalyst coatings that crystal grain is 10 ~ 35nm, and the substrate of described nano-catalytic noble electrode is titanium plate or plastic plate.
Further, a filtering system is also provided with between described chemical decalcification system and electrolytic system, this filtering system comprises working shaft, strainer, backwashing pump and cleaning fluid tank, the import of working shaft connects the outlet of chemical decalcification system, water supply pump outlet connects the import of strainer, outlet one tunnel of strainer is connected with electrolytic system, and another road connects cleaning fluid tank through backwashing pump successively.
Further, described filtering membrane is the one in microfiltration membrane, ultra-filtration membrane or MBR, and described microfiltration membrane is the one in organic membrane, metallic membrane or ceramic membrane, and its aperture is between 1 μm-10 μm; Described ultrafiltration is the one in immersion ultrafiltration, pillar ultrafiltration, tubular type ultrafiltration, spiral wound or plate-type hyperfiltration, molecular weight cut-off is 1000 ~ 50000MWCO, working conditions is: normal temperature ~ 45 DEG C, the operating pressure of immersion ultrafiltration is-1 ~-50kPa, and the operating pressure of pillar ultrafiltration, tubular type ultrafiltration, spiral wound and plate-type hyperfiltration is 3 ~ 300kPa; The membrane pore size of described MBR membrane module is 0.10 ~ 0.2 μm, and operating pressure is-1 ~-50kPa, and working temperature is 5 ~ 45 DEG C.
Further, described filtering membrane is nanofiltration membrane, it is the nanofiltration membrane of at least 98% that nanofiltration membrane adopts magnesium sulfate rejection rate, the molecular weight cut-off of nanofiltration membrane is 200MWCO-500MWCO, entrance pressure is 6bar-45bar, go out pressure for 4.5bar-43.5bar, and the structure of its membrane module is rolled membrane module or tubular membrane component, working temperature is 20 ~ 45 DEG C.
Further, described desalting plant comprises single stage desalting device, one-level dialyzate produces pond, secondary desalting plant and secondary dialyzate produce pond, the import of single stage desalting device connects the outlet that is produced from pond in ultrafiltration, the concentrated solution outlet of single stage desalting device directly discharges, the dialyzate outlet of single stage desalting device connects the import that one-level dialyzate produces pond, one-level dialyzate produces the import of the outlet connection secondary desalting plant in pond, the concentrated solution outlet of secondary desalting plant directly discharges, the dialyzate outlet of secondary desalting plant connects the import that secondary dialyzate produces pond, secondary dialyzate produces the import of outlet by an ion exchange unit in pond, the outlet of ion exchange unit is connected to boiler.
Further, described desalting plant is Reverse Osmosis Desalination Process Equipment, reverse osmosis membrane assembly in Reverse Osmosis Desalination Process Equipment is rolled membrane module, mould material is cellulose acetate film or composite membrane in organic membrane, the molecular weight cut-off of mould material is 50 ~ 200MWCO, entrance pressure is 6.0 ~ 35.0bar, and going out pressure is 4.5 ~ 33.5bar.
Further, described desalting plant is positive osmosis desalination unit, and the membrane module of positive osmosis desalination unit is the one in plate and frame module, rolled membrane module, tubular membrane component and packet mode membrane module.
Further, described desalting plant is electrodialytic desalting device, and the working conditions of electrodialytic desalting device is operating voltage pressure 0.5 ~ 3.0 ㎏/㎝
2, operating voltage 50 ~ 250V, strength of current 1 ~ 3A.
Further, described desalting plant is capacitive adsorption desalting plant, and the working conditions of capacitive adsorption desalting plant is volts DS is 110V ~ 2 × 10
6v.
Chemical decalcification system of the present invention relates to following chemical equation:
CaO+HCO
3 -→CaCO
3↓+H
2O
Ca
2++CO
3 2-→CaCO
3↓
Mg
2++CO
3 2-→MgCO
3↓
Compared to the prior art, tool has the following advantages in the present invention:
1, in oil extraction waste water, content of calcium and magnesium is high, film calcification and dirt is easily caused to block up, at preprocessing process, by feeding lime breast, sodium carbonate and coordinate coagulating agent, flocculation agent by calcium, magnesium ion remove, and remove a part of sulfate ion, thus the concentration of calcium ions and magnesium ions is controlled be less than 80mg/L.
2, the waste water after chemical process process, again through membrane filtration, reduces the index such as SS, turbidity of waste water, enters film requirement with what meet reverse osmosis.
3, the oil extraction waste water after membrane filtration process, through desalting treatment, removes the metal ion in water, reduces saltiness.
4, by apparatus of the present invention, the rate of recovery to oil extraction waste water 50 ~ 65% is realized.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the embodiment of the present invention 1.
Fig. 2 is the structured flowchart of the embodiment of the present invention 2.
Fig. 3 is the structured flowchart of the embodiment of the present invention 3.
Fig. 4 is the structured flowchart of the embodiment of the present invention 4.
Embodiment
Referring to figure, the specific embodiment of the present invention is described.
embodiment 1
A kind of high salt oil production waste water process and recycling device thereof, with reference to Fig. 1, comprise chemical decalcification system, membrane filtration system and desalination system.
Chemistry decalcification system is for removing calcium ions and magnesium ions, the reduction water hardness in oil extraction waste water, chemistry decalcification system comprises decalcification reaction tank 11, settling tank 12 and clean water basin 13, the import of decalcification reaction tank 11 connects the outlet of oil extraction waste water discharge water, the outlet of decalcification reaction tank 21 connects the import of settling tank 22, the outlet of settling tank 22 is connected with the import of clean water basin 23, the import of the outlet junctional membrane filtering system of clean water basin 23.Decalcification reaction tank 11 is also equipped with medicine system, and medicine system is provided with grug feeding jar 111 and dosing pump 112, and grug feeding jar 111 exports the import connecting dosing pump 112, and the outlet of dosing pump 112 connects decalcification reaction tank 11.
Membrane filtration system is used for graininess Impurity removal in oil extraction waste water, membrane filtration system comprises filtering membrane 21 and filters product pond 22, the import of filtering membrane 21 connects the outlet of clean water basin 13, the outlet of filtering membrane 21 connects the import of filtering and producing pond 22, filters the import that the outlet of producing pond 22 connects desalination system.
Filtering membrane 21 can be the one in microfiltration membrane, ultra-filtration membrane or MBR, and microfiltration membrane is the one in organic membrane, metallic membrane or ceramic membrane, and its aperture is between 1 μm-10 μm; Ultrafiltration is the one in immersion ultrafiltration, pillar ultrafiltration, tubular type ultrafiltration, spiral wound or plate-type hyperfiltration, molecular weight cut-off is 1000 ~ 50000MWCO, working conditions is: normal temperature ~ 45 DEG C, the operating pressure of immersion ultrafiltration is-1 ~-50kPa, and the operating pressure of pillar ultrafiltration, tubular type ultrafiltration, spiral wound and plate-type hyperfiltration is 3 ~ 300kPa; The membrane pore size of described MBR membrane module is 0.10 ~ 0.2 μm, and operating pressure is-1 ~-50kPa, and working temperature is 5 ~ 45 DEG C.
Filtering membrane 21 also can be nanofiltration membrane, it is the nanofiltration membrane of at least 98% that nanofiltration membrane adopts magnesium sulfate rejection rate, the molecular weight cut-off of nanofiltration membrane is 200MWCO-500MWCO, entrance pressure is 6bar-45bar, go out pressure for 4.5bar-43.5bar, and the structure of its membrane module is rolled membrane module or tubular membrane component, working temperature is 20 ~ 45 DEG C.
Desalination system comprises a desalting plant 31 and a dialyzate produces pond 32, the import of desalting plant 31 connects the outlet that is produced from pond 22 in ultrafiltration, the concentrated solution outlet of desalting plant 31 directly discharges, the dialyzate outlet of desalting plant 31 connects the import that dialyzate produces pond 32, and the outlet that dialyzate produces pond 32 is connected to boiler.
Above-mentioned desalting plant 31 can be Reverse Osmosis Desalination Process Equipment, reverse osmosis membrane assembly in Reverse Osmosis Desalination Process Equipment is rolled membrane module, mould material is cellulose acetate film or composite membrane in organic membrane, the molecular weight cut-off of mould material is 50 ~ 200MWCO, entrance pressure is 6.0 ~ 35.0bar, and going out pressure is 4.5 ~ 33.5bar.
Desalting plant 31 also can be positive osmosis desalination unit, and the membrane module of positive osmosis desalination unit is the one in plate and frame module, rolled membrane module, tubular membrane component and packet mode membrane module.
Desalting plant 31 can be electrodialytic desalting device, and the working conditions of electrodialytic desalting device is operating voltage pressure 0.5 ~ 3.0 ㎏/㎝
2, operating voltage 50 ~ 250V, strength of current 1 ~ 3A.
Desalting plant 31 can also be capacitive adsorption desalting plant, and the working conditions of capacitive adsorption desalting plant is volts DS is 110V ~ 2 × 10
6v.
embodiment 2
A kind of oil extraction waste water process and recycling device thereof, with reference to Fig. 2, comprise chemical decalcification system, membrane filtration system and desalination system.
Chemistry decalcification system is for removing calcium ions and magnesium ions, the reduction water hardness in oil extraction waste water, chemistry decalcification system comprises decalcification reaction tank 11, settling tank 12 and clean water basin 13, the import of decalcification reaction tank 11 connects the outlet of oil extraction waste water discharge water, the outlet of decalcification reaction tank 21 connects the import of settling tank 22, the outlet of settling tank 22 is connected with the import of clean water basin 23, the import of the outlet junctional membrane filtering system of clean water basin 23.Decalcification reaction tank 11 is also equipped with medicine system, and medicine system is provided with grug feeding jar 111 and dosing pump 112, and grug feeding jar 111 exports the import connecting dosing pump 112, and the outlet of dosing pump 112 connects decalcification reaction tank 11.
Membrane filtration system is used for graininess Impurity removal in oil extraction waste water, membrane filtration system comprises filtering membrane 21 and filters product pond 22, the import of filtering membrane 21 connects the outlet of clean water basin 13, the outlet of filtering membrane 21 connects the import of filtering and producing pond 22, filters the import that the outlet of producing pond 22 connects desalination system.
Filtering membrane 21 can be the one in microfiltration membrane, ultra-filtration membrane or MBR, and microfiltration membrane is the one in organic membrane, metallic membrane or ceramic membrane, and its aperture is between 1 μm-10 μm; Ultrafiltration is the one in immersion ultrafiltration, pillar ultrafiltration, tubular type ultrafiltration, spiral wound or plate-type hyperfiltration, molecular weight cut-off is 1000 ~ 50000MWCO, working conditions is: normal temperature ~ 45 DEG C, the operating pressure of immersion ultrafiltration is-1 ~-50kPa, and the operating pressure of pillar ultrafiltration, tubular type ultrafiltration, spiral wound and plate-type hyperfiltration is 3 ~ 300kPa; The membrane pore size of described MBR membrane module is 0.10 ~ 0.2 μm, and operating pressure is-1 ~-50kPa, and working temperature is 5 ~ 45 DEG C.
Filtering membrane 21 also can be nanofiltration membrane, it is the nanofiltration membrane of at least 98% that nanofiltration membrane adopts magnesium sulfate rejection rate, the molecular weight cut-off of nanofiltration membrane is 200MWCO-500MWCO, entrance pressure is 6bar-45bar, go out pressure for 4.5bar-43.5bar, and the structure of its membrane module is rolled membrane module or tubular membrane component, working temperature is 20 ~ 45 DEG C.
Desalination system comprises single stage desalting device 31, one-level dialyzate produces pond 32, secondary desalting plant 33 and secondary dialyzate produce pond 34, the import of single stage desalting device 31 connects the outlet that is produced from pond 22 in ultrafiltration, the concentrated solution outlet of single stage desalting device 31 directly discharges, the dialyzate outlet of single stage desalting device 31 connects the import that one-level dialyzate produces pond 32, one-level dialyzate produces the import of the outlet connection secondary desalting plant 33 in pond 32, the concentrated solution outlet of secondary desalting plant 33 directly discharges, the dialyzate outlet of secondary desalting plant 33 connects the import that secondary dialyzate produces pond 34, the outlet in secondary dialyzate product pond 34 connects the import of an ion exchange unit 35, the outlet of ion exchange unit 35 is connected to boiler.
Above-mentioned desalting plant can be Reverse Osmosis Desalination Process Equipment, reverse osmosis membrane assembly in Reverse Osmosis Desalination Process Equipment is rolled membrane module, mould material is cellulose acetate film or composite membrane in organic membrane, the molecular weight cut-off of mould material is 50 ~ 200MWCO, entrance pressure is 6.0 ~ 35.0bar, and going out pressure is 4.5 ~ 33.5bar.
Desalting plant also can be positive osmosis desalination unit, and the membrane module of positive osmosis desalination unit is the one in plate and frame module, rolled membrane module, tubular membrane component and packet mode membrane module.
Desalting plant also can be electrodialytic desalting device, and the working conditions of electrodialytic desalting device is operating voltage pressure 0.5 ~ 3.0 ㎏/㎝
2, operating voltage 50 ~ 250V, strength of current 1 ~ 3A.
Desalting plant can also be capacitive adsorption desalting plant, and the working conditions of capacitive adsorption desalting plant is volts DS is 110V ~ 2 × 10
6v.
embodiment 3
A kind of oil extraction waste water process and recycling device thereof, with reference to Fig. 3, comprise chemical decalcification system, electrolytic system, membrane filtration system and desalination system.
Chemistry decalcification system is for removing calcium ions and magnesium ions, the reduction water hardness in oil extraction waste water, chemistry decalcification system comprises decalcification reaction tank 11, settling tank 12 and clean water basin 13, the import of decalcification reaction tank 11 connects the outlet of oil extraction waste water discharge water, the outlet of decalcification reaction tank 21 connects the import of settling tank 22, the outlet of settling tank 22 is connected with the import of clean water basin 23, the import of the outlet junctional membrane filtering system of clean water basin 23.Decalcification reaction tank 11 is also equipped with medicine system, and medicine system is provided with grug feeding jar 111 and dosing pump 112, and grug feeding jar 111 exports the import connecting dosing pump 112, and the outlet of dosing pump 112 connects decalcification reaction tank 11.
Electrolytic system is provided with working shaft 21 and electrolysis machine 22(or electric air floating device), the import of working shaft 21 connects the outlet of clean water basin 13, the outlet of working shaft 21 connects electrolysis machine 22(or electric air floating device) import, electrolysis machine 22(or electric air floating device) outlet be connected with the import of membrane filtration system.Electrolysis machine 21 is provided with power supply and electrolyzer, electrode in described electrolyzer is the one in graphite, titanium, iron, aluminium, zinc, copper, lead, nickel, molybdenum, chromium, alloy and nano-catalytic noble electrode, the top layer of described nano-catalytic noble electrode is coated with the metal oxide inertia catalyst coatings that crystal grain is 10 ~ 35nm, and the substrate of described nano-catalytic noble electrode is titanium plate or plastic plate.
Membrane filtration system is used for graininess Impurity removal in oil extraction waste water, membrane filtration system comprises filtering membrane 31 and filters product pond 32, the import of filtering membrane 31 connects the outlet of electrolysis machine, the outlet of filtering membrane 31 connects the import of filtering and producing pond 32, filters the import that the outlet of producing pond 32 connects desalination system.
Filtering membrane 31 can be the one in microfiltration membrane, ultra-filtration membrane or MBR, and microfiltration membrane is the one in organic membrane, metallic membrane or ceramic membrane, and its aperture is between 1 μm-10 μm; Ultrafiltration is the one in immersion ultrafiltration, pillar ultrafiltration, tubular type ultrafiltration, spiral wound or plate-type hyperfiltration, molecular weight cut-off is 1000 ~ 50000MWCO, working conditions is: normal temperature ~ 45 DEG C, the operating pressure of immersion ultrafiltration is-1 ~-50kPa, and the operating pressure of pillar ultrafiltration, tubular type ultrafiltration, spiral wound and plate-type hyperfiltration is 3 ~ 300kPa; The membrane pore size of described MBR membrane module is 0.10 ~ 0.2 μm, and operating pressure is-1 ~-50kPa, and working temperature is 5 ~ 45 DEG C.
Filtering membrane 31 also can be nanofiltration membrane, it is the nanofiltration membrane of at least 98% that nanofiltration membrane adopts magnesium sulfate rejection rate, the molecular weight cut-off of nanofiltration membrane is 200MWCO-500MWCO, entrance pressure is 6bar-45bar, go out pressure for 4.5bar-43.5bar, and the structure of its membrane module is rolled membrane module or tubular membrane component, working temperature is 20 ~ 45 DEG C.
Desalination system comprises a desalting plant 41 and a dialyzate produces pond 42, the import of desalting plant 41 connects the outlet that is produced from pond 42 in ultrafiltration, the concentrated solution outlet of desalting plant 41 directly discharges, the dialyzate outlet of desalting plant 41 connects the import that dialyzate produces pond 42, and the outlet that dialyzate produces pond 42 is connected to boiler.
Above-mentioned desalting plant 41 can be Reverse Osmosis Desalination Process Equipment, reverse osmosis membrane assembly in Reverse Osmosis Desalination Process Equipment is rolled membrane module, mould material is cellulose acetate film or composite membrane in organic membrane, the molecular weight cut-off of mould material is 50 ~ 200MWCO, entrance pressure is 6.0 ~ 35.0bar, and going out pressure is 4.5 ~ 33.5bar.
Desalting plant 41 also can be positive osmosis desalination unit, and the membrane module of positive osmosis desalination unit is the one in plate and frame module, rolled membrane module, tubular membrane component and packet mode membrane module.
Desalting plant 41 can be electrodialytic desalting device, and the working conditions of electrodialytic desalting device is operating voltage pressure 0.5 ~ 3.0 ㎏/㎝
2, operating voltage 50 ~ 250V, strength of current 1 ~ 3A.
Desalting plant 41 can also be capacitive adsorption desalting plant, and the working conditions of capacitive adsorption desalting plant is volts DS is 110V ~ 2 × 10
6v.
embodiment 4
A kind of oil extraction waste water process and recycling device thereof, with reference to Fig. 4, comprise chemical decalcification system, filtering system, electrolytic system, membrane filtration system and desalination system.
Chemistry decalcification system is for removing calcium ions and magnesium ions, the reduction water hardness in oil extraction waste water, chemistry decalcification system comprises decalcification reaction tank 11, settling tank 12 and clean water basin 13, the import of decalcification reaction tank 11 connects the outlet of oil extraction waste water discharge water, the outlet of decalcification reaction tank 21 connects the import of settling tank 22, the outlet of settling tank 22 is connected with the import of clean water basin 23, the import of the outlet junctional membrane filtering system of clean water basin 23.Decalcification reaction tank 11 is also equipped with medicine system, and medicine system is provided with grug feeding jar 111 and dosing pump 112, and grug feeding jar 111 exports the import connecting dosing pump 112, and the outlet of dosing pump 112 connects decalcification reaction tank 11.
Filtering system comprises working shaft 21, strainer 22, backwashing pump 23 and cleaning fluid tank 24, the import of working shaft 21 connects the outlet of clean water basin 13, the outlet of working shaft 21 connects the import of strainer 22, outlet one tunnel of strainer 22 is connected with electrolytic system, and another road connects cleaning fluid tank 24 through backwashing pump 23 successively.
Electrolytic system is provided with working shaft 31 and electrolysis machine 32(or electric air floating device), the import of working shaft 31 connects the outlet of strainer 22, the outlet of working shaft 31 connects electrolysis machine 32(or electric air floating device) import, electrolysis machine 32(or electric air floating device) outlet be connected with the import of membrane filtration system.Electrolysis machine 31 is provided with power supply and electrolyzer, electrode in described electrolyzer is the one in graphite, titanium, iron, aluminium, zinc, copper, lead, nickel, molybdenum, chromium, alloy and nano-catalytic noble electrode, the top layer of described nano-catalytic noble electrode is coated with the metal oxide inertia catalyst coatings that crystal grain is 10 ~ 35nm, and the substrate of described nano-catalytic noble electrode is titanium plate or plastic plate.
Membrane filtration system is used for graininess Impurity removal in oil extraction waste water, membrane filtration system comprises filtering membrane 41 and filters product pond 42, the import of filtering membrane 41 connects the outlet of electrolysis machine, the outlet of filtering membrane 41 connects the import of filtering and producing pond 42, filters the import that the outlet of producing pond 42 connects desalination system.
Filtering membrane 41 can be the one in microfiltration membrane, ultra-filtration membrane or MBR, and microfiltration membrane is the one in organic membrane, metallic membrane or ceramic membrane, and its aperture is between 1 μm-10 μm; Ultrafiltration is the one in immersion ultrafiltration, pillar ultrafiltration, tubular type ultrafiltration, spiral wound or plate-type hyperfiltration, molecular weight cut-off is 1000 ~ 50000MWCO, working conditions is: normal temperature ~ 45 DEG C, the operating pressure of immersion ultrafiltration is-1 ~-50kPa, and the operating pressure of pillar ultrafiltration, tubular type ultrafiltration, spiral wound and plate-type hyperfiltration is 3 ~ 300kPa; The membrane pore size of described MBR membrane module is 0.10 ~ 0.2 μm, and operating pressure is-1 ~-50kPa, and working temperature is 5 ~ 45 DEG C.
Filtering membrane 41 also can be nanofiltration membrane, it is the nanofiltration membrane of at least 98% that nanofiltration membrane adopts magnesium sulfate rejection rate, the molecular weight cut-off of nanofiltration membrane is 200MWCO-500MWCO, entrance pressure is 6bar-45bar, go out pressure for 4.5bar-43.5bar, and the structure of its membrane module is rolled membrane module or tubular membrane component, working temperature is 20 ~ 45 DEG C.
Desalination system comprises a desalting plant 51 and a dialyzate produces pond 52, the import of desalting plant 51 connects the outlet that is produced from pond 52 in ultrafiltration, the concentrated solution outlet of desalting plant 51 directly discharges, the dialyzate outlet of desalting plant 51 connects the import that dialyzate produces pond 52, and the outlet that dialyzate produces pond 52 is connected to boiler.
Above-mentioned desalting plant 61 can be Reverse Osmosis Desalination Process Equipment, reverse osmosis membrane assembly in Reverse Osmosis Desalination Process Equipment is rolled membrane module, mould material is cellulose acetate film or composite membrane in organic membrane, the molecular weight cut-off of mould material is 50 ~ 200MWCO, entrance pressure is 6.0 ~ 35.0bar, and going out pressure is 4.5 ~ 33.5bar.
Desalting plant 61 also can be positive osmosis desalination unit, and the membrane module of positive osmosis desalination unit is the one in plate and frame module, rolled membrane module, tubular membrane component and packet mode membrane module.
Desalting plant 61 can be electrodialytic desalting device, and the working conditions of electrodialytic desalting device is operating voltage pressure 0.5 ~ 3.0 ㎏/㎝
2, operating voltage 50 ~ 250V, strength of current 1 ~ 3A.
Desalting plant 61 can also be capacitive adsorption desalting plant, and the working conditions of capacitive adsorption desalting plant is volts DS is 110V ~ 2 × 10
6v.
Above are only the specific embodiment of the present invention, but design concept of the present invention is not limited thereto, all changes utilizing this design the present invention to be carried out to unsubstantiality, all should belong to the behavior of invading scope.
Claims (13)
1. high salt oil production waste water process and a recycling device thereof, is characterized in that, comprises chemical decalcification system, membrane filtration system and desalination system;
Described chemical decalcification system is for removing calcium ions and magnesium ions, the reduction water hardness in oil extraction waste water, chemistry decalcification system comprises decalcification reaction tank, settling tank and clean water basin, the import of decalcification reaction tank connects the outlet of oil extraction waste water discharge water, the outlet of decalcification reaction tank connects the import of settling tank, the outlet of settling tank is connected with the import of clean water basin, the import of the outlet junctional membrane filtering system of clean water basin;
Described membrane filtration system is used for graininess Impurity removal in oil extraction waste water, membrane filtration system comprises filtering membrane and filters product pond, the import of described filtering membrane connects the outlet of clean water basin, the outlet of filtering membrane connects the import of filtering and producing pond, filters the import that the outlet of producing pond connects desalination system;
Described desalination system comprises a desalting plant, and the import of desalting plant connects the outlet that is produced from pond in ultrafiltration, and the concentrated solution outlet of desalting plant directly discharges, and the dialyzate outlet of desalting plant is connected to boiler.
2. a kind of high salt oil production waste water process as claimed in claim 1 and recycling device thereof, it is characterized in that: described decalcification reaction tank is also equipped with medicine system, medicine system is provided with grug feeding jar and dosing pump, grug feeding jar outlet connects the import of dosing pump, and dosing pump outlet connects decalcification reaction tank.
3. a kind of high salt oil production waste water process as claimed in claim 1 and recycling device thereof, it is characterized in that: between described chemical decalcification system and membrane filtration system, be also provided with an electrolytic system, described electrolytic system is provided with working shaft and electrolysis machine or electric air floating device, the import of described working shaft connects the outlet of chemical decalcification system, described water supply pump outlet connects the import of electrolysis machine or electric air floating device, and the outlet of electrolysis machine or electric air floating device is connected with the import of membrane filtration system.
4. a kind of high salt oil production waste water process as claimed in claim 3 and recycling device thereof, it is characterized in that: described electrolysis machine is provided with power supply and electrolyzer, the electrode in described electrolyzer is the one in graphite, titanium, iron, aluminium, zinc, copper, lead, nickel, molybdenum, chromium, alloy and nano-catalytic noble electrode.
5. a kind of high salt oil production waste water process as claimed in claim 4 and recycling device thereof, it is characterized in that: the top layer of described nano-catalytic noble electrode is coated with the metal oxide inertia catalyst coatings that crystal grain is 10 ~ 35nm, and the substrate of described nano-catalytic noble electrode is titanium plate or plastic plate.
6. a kind of high salt oil production waste water process as claimed in claim 3 and recycling device thereof, it is characterized in that: between described chemical decalcification system and electrolytic system, be also provided with a filtering system, this filtering system comprises working shaft, strainer, backwashing pump and cleaning fluid tank, the import of working shaft connects the outlet of chemical decalcification system, water supply pump outlet connects the import of strainer, outlet one tunnel of strainer is connected with electrolytic system, and another road connects cleaning fluid tank through backwashing pump successively.
7. a kind of high salt oil production waste water process as claimed in claim 1 and recycling device thereof, it is characterized in that: described filtering membrane is the one in microfiltration membrane, ultra-filtration membrane or MBR, described microfiltration membrane is the one in organic membrane, metallic membrane or ceramic membrane, and its aperture is between 1 μm-10 μm; Described ultrafiltration is the one in immersion ultrafiltration, pillar ultrafiltration, tubular type ultrafiltration, spiral wound or plate-type hyperfiltration, molecular weight cut-off is 1000 ~ 50000MWCO, working conditions is: normal temperature ~ 45 DEG C, the operating pressure of immersion ultrafiltration is-1 ~-50kPa, and the operating pressure of pillar ultrafiltration, tubular type ultrafiltration, spiral wound and plate-type hyperfiltration is 3 ~ 300kPa; The membrane pore size of described MBR membrane module is 0.10 ~ 0.2 μm, and operating pressure is-1 ~-50kPa, and working temperature is 5 ~ 45 DEG C.
8. a kind of high salt oil production waste water process as claimed in claim 1 and recycling device thereof, it is characterized in that: described filtering membrane is nanofiltration membrane, it is the nanofiltration membrane of at least 98% that nanofiltration membrane adopts magnesium sulfate rejection rate, the molecular weight cut-off of nanofiltration membrane is 200MWCO-500MWCO, entrance pressure is 6bar-45bar, go out pressure for 4.5bar-43.5bar, and the structure of its membrane module is rolled membrane module or tubular membrane component, working temperature is 20 ~ 45 DEG C.
9. a kind of high salt oil production waste water process as claimed in claim 1 and recycling device thereof, it is characterized in that: described desalting plant comprises single stage desalting device, one-level dialyzate produces pond, secondary desalting plant and secondary dialyzate produce pond, the import of single stage desalting device connects the outlet that is produced from pond in ultrafiltration, the concentrated solution outlet of single stage desalting device directly discharges, the dialyzate outlet of single stage desalting device connects the import that one-level dialyzate produces pond, one-level dialyzate produces the import of the outlet connection secondary desalting plant in pond, the concentrated solution outlet of secondary desalting plant directly discharges, the dialyzate outlet of secondary desalting plant connects the import that secondary dialyzate produces pond, secondary dialyzate produces the import of outlet by an ion exchange unit in pond, the outlet of ion exchange unit is connected to boiler.
10. a kind of high salt oil production waste water process as claimed in claim 1 and recycling device thereof, it is characterized in that: described desalting plant is Reverse Osmosis Desalination Process Equipment, reverse osmosis membrane assembly in Reverse Osmosis Desalination Process Equipment is rolled membrane module, mould material is cellulose acetate film or composite membrane in organic membrane, the molecular weight cut-off of mould material is 50 ~ 200MWCO, entrance pressure is 6.0 ~ 35.0bar, and going out pressure is 4.5 ~ 33.5bar.
11. a kind of high salt oil production waste water process as claimed in claim 1 and recycling devices thereof, it is characterized in that: described desalting plant is positive osmosis desalination unit, the membrane module of positive osmosis desalination unit is the one in plate and frame module, rolled membrane module, tubular membrane component and packet mode membrane module.
12. a kind of high salt oil production waste water process as claimed in claim 1 and recycling devices thereof, is characterized in that: described desalting plant is electrodialytic desalting device, and the working conditions of electrodialytic desalting device is operating voltage pressure 0.5 ~ 3.0 ㎏/㎝
2, operating voltage 50 ~ 250V, strength of current 1 ~ 3A.
13. a kind of high salt oil production waste water process as claimed in claim 1 and recycling devices thereof, is characterized in that: described desalting plant is capacitive adsorption desalting plant, the working conditions of capacitive adsorption desalting plant is volts DS is 110V ~ 2 × 10
6v.
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