CN103990313A - Low-permeability oilfield produced water filtering system and backwashing process thereof - Google Patents

Low-permeability oilfield produced water filtering system and backwashing process thereof Download PDF

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Publication number
CN103990313A
CN103990313A CN201410247114.6A CN201410247114A CN103990313A CN 103990313 A CN103990313 A CN 103990313A CN 201410247114 A CN201410247114 A CN 201410247114A CN 103990313 A CN103990313 A CN 103990313A
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water
backwash
filter
valve
backwash water
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CN201410247114.6A
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CN103990313B (en
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黄豪明
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Bonded Area Zhangjiagang Jin Pin Chemical Mechanical Equipment Co Ltd
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Bonded Area Zhangjiagang Jin Pin Chemical Mechanical Equipment Co Ltd
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Abstract

The invention discloses a low-permeability oilfield produced water filtering system. The system comprises at least two filters, wherein a water feeding pipeline is connected with a pre-filter mechanism; the pre-filter mechanism is connected with a filter pressure pump; the filter pressure pump is connected with a filter water inlet main pipe; the filter water inlet main pipe is connected with a water outlet pipeline; the filter water inlet main pipe is connected with all filters; the filters are respectively connected with a filter water outlet main pipe; the filter water outlet main pipe is connected with the filter pressure pump and connected with a heat exchanger at the same time; the heat exchanger is connected with a horizontal type backwash tank; the horizontal type backwash tank is connected with a backwash pump; the backwash pump is connected with a backwash water inlet main pipe; the backwash water inlet main pipe is connected with backwash water inlets of all the filters; the filters are communicated with a backwash water outlet main pipe; the backwash water outlet main pipe is communicated with a sewage pool and a backwash water circulation pipeline; a backwash pump communicating valve is arranged on the backwash water circulation pipeline; the sewage pool is connected with the water feeding pipeline. The system disclosed by the invention has the advantages of good filtering and backwashing effects.

Description

Low permeability oil field recovered water filtration system and backwash process thereof
Technical field
The present invention relates to low permeability oil field recovered water filtration system and backwash process thereof.
Background technology
Due to low permeability oil field (oil reservoir average air permeability≤100 * 10 -3μ m 2) oil field extracted water raw water quality salinity high (50~120g/L), the little total amount of suspended particulate particle diameter large, filtration treatment difficulty is large.Also do not have at present low permeability oil field produced water treatment to be filtered to and adapt to the filtration system that oil field requires; And due to the inefficacy of in use easily hardening of the filtrate of filter, and then cause that low permeability oil field recovered water filtration system can not normally be moved, effluent quality can not stably reaching standard, current used filtrate backwash process can not meet the requirement of the thorough activity recovery of filtrate.
Summary of the invention
The object of this invention is to provide a kind of low permeability oil field recovered water filtration system and backwash process thereof to oil field extracted water good filtration effect.
For achieving the above object, the present invention has adopted following technical scheme: described low permeability oil field recovered water filtration system, comprise: carry out water lines, and at least two filters, come water lines to be connected with the import of pre-filtering mechanism, the outlet of pre-filtering mechanism is connected with the import of filter-press pump by the first pipeline and the first valve, filter-press delivery side of pump is connected with filtered water water inlet manifold by the second pipeline and the second valve, filtered water water inlet manifold is connected with outlet pipeline simultaneously, filtered water water inlet manifold is connected with the filtered water import of all filters by filtered water water inlet pipe and filtered water inlet valve respectively simultaneously, the filtered water outlet of every filter respectively by filtered water exit branch with filter out water valve and be connected with filtered water outfall sewer simultaneously, filtered water outfall sewer is connected with the import of filter-press pump by filtration cycle pipeline, filtered water outfall sewer is connected with heat exchanger by the 3rd pipeline and the 3rd valve simultaneously, heat exchanger is connected with horizontal type backflushing cleaning of evaporator with the 4th valve by the 4th pipeline, horizontal type backflushing cleaning of evaporator is connected with the import of backwashing pump by the 5th pipeline and backwashing pump water intaking valve, backwash delivery side of pump is connected with backwash water water inlet manifold by the 6th pipeline and backwashing pump outlet valve, backwash water water inlet manifold is connected with the backwash water import of filter with the while by backwash water water inlet pipe and backwash water intaking valve respectively, the backwash water outlet of every filter is connected with backwash water outfall sewer by backwash water exit branch and backwash outlet valve respectively, backwash water outfall sewer is connected with cesspool and backwash water circulation line simultaneously, is provided with backwashing pump communicating valve on backwash water circulation line, and cesspool is connected with carrying out water lines by sewage pump and the 7th pipeline.
Further, aforesaid low permeability oil field recovered water filtration system, wherein: also comprise cleaning agent supply device, the water inlet of cleaning agent supply device is connected with backwash delivery side of pump, and the delivery port of cleaning agent supply device is connected with the import of backwashing pump.
Further, aforesaid low permeability oil field recovered water filtration system, wherein: on filtration cycle pipeline, be provided with chemicals feeder.
Further, aforesaid low permeability oil field recovered water filtration system, wherein: pre-filtering mechanism comprises sedimentation oil removing pot and Horizontal buffer tank; Come the outlet of water lines to be connected with the import of sedimentation oil removing pot, the outlet of sedimentation oil removing pot is connected with the import of Horizontal buffer tank by the 8th pipeline and the 5th valve, and the outlet of Horizontal buffer tank is connected with the import of filter-press pump by the first pipeline and the first valve.
Further, aforesaid low permeability oil field recovered water filtration system, wherein: described backwashing pump is gas-liquid mixing pump.
The backwash process of described low permeability oil field recovered water filtration system, comprises the steps:
(1) when the Inlet and outlet water pressure reduction of a certain filter reaches 0.2Mpa, by the filtered water inlet valve of this filter with filter out water valve and close, then open backwashing pump water intaking valve, backwashing pump outlet valve, backwash water intaking valve and backwash outlet valve, start backwashing pump simultaneously, backwashing pump is extracted out the backwash water having heated in horizontal type backflushing cleaning of evaporator, and continue to send into this filter along backwash water water inlet manifold and backwash water water inlet pipe, after entering the backwash water flushing filtrate in this filter, from the backwash water outlet of this filter, export, and continue to inject cesspool through backwash water exit branch and backwash water outfall sewer, this step operation 5-8 minute,
(2) after above-mentioned first step finishes, open the backwashing pump communicating valve on backwash water circulation line, the backwash water of now exporting from the backwash water outlet of this filter is under the effect of backwashing pump, can be successively through backwash water exit branch, backwash water outfall sewer and backwash water circulation line flow into backwashing pump from the import of backwashing pump, then be backwashed pump from its outlet output, and successively through the 6th pipeline, backwash water water inlet manifold and backwash water water inlet pipe enter this filter from the backwash water import of this filter, after entering the backwash water flushing filtrate in this filter, from the backwash water outlet of this filter, export again, repeat this circulation backwash step 13-18 minute,
(3) after above-mentioned second step finishes, close the backwashing pump communicating valve on backwash water circulation line, now backwashing pump is again extracted the backwash water having heated in horizontal type backflushing cleaning of evaporator out and is continued to send into this filter along backwash water water inlet manifold and backwash water water inlet pipe, after entering the backwash water flushing filtrate in this filter, from the backwash water outlet of this filter, export and continue to inject cesspool through backwash water exit branch and backwash water outfall sewer, this step is moved 6-10 minute;
(4) after third step finishes, then close backwashing pump water intaking valve, backwashing pump outlet valve, backwash water intaking valve and backwash outlet valve, stop the action of backwashing pump simultaneously.
Enforcement by technique scheme, the invention has the beneficial effects as follows: the good filtration effect to oil field extracted water, and after the losing efficacy of filtrating box in filter, can make filtrate thoroughly recover filter activity.
Accompanying drawing explanation
Fig. 1 is the structural representation of low permeability oil field recovered water filtration system of the present invention.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
As shown in Figure 1, described low permeability oil field recovered water filtration system, comprise: come water lines 1 and at least two filters, in the present embodiment, three filters have been comprised, i.e. the first filter 2, the second filter 21 and the 3rd filter 211, wherein two filter work, an other filter is standby; come water lines 1 to be connected with the import of pre-filtering mechanism 3, the outlet of pre-filtering mechanism 3 is connected with the import of filter-press pump 6 by the first pipeline 4 and the first valve 5, the outlet of filter-press pump 6 is connected with filtered water water inlet manifold 7 by the second pipeline 41 and the second valve 51, filtered water water inlet manifold 7 is connected with outlet pipeline 49, on outlet pipeline 49, be provided with the 6th valve 55, filtered water water inlet manifold 7 is also connected with the filtered water import of all filters by filtered water water inlet pipe 8 and filtered water inlet valve 9 respectively simultaneously, the filtered water outlet of every filter respectively by filtered water exit branch 10 with filter out water valve 11 and be connected with filtered water outfall sewer 12 simultaneously, filtered water outfall sewer 12 is connected with the import of filter-press pump 6 by filtration cycle pipeline 47, filtered water outfall sewer 12 is also connected with heat exchanger 13 by the 3rd pipeline 42 and the 3rd valve 52, heat exchanger 13 is connected with horizontal type backflushing cleaning of evaporator 14 with the 4th valve 53 by the 4th pipeline 43, horizontal type backflushing cleaning of evaporator 14 is connected with the import of backwashing pump 16 by the 5th pipeline 44 and backwashing pump water intaking valve 15, the outlet of backwashing pump 16 is connected with backwash water water inlet manifold 18 by the 6th pipeline 45 and backwashing pump outlet valve 17, backwash water water inlet manifold 18 is connected with the backwash water import of each filter by backwash water water inlet pipe 19 and backwash water intaking valve 20 respectively, the backwash water outlet of every filter is connected with backwash water outfall sewer 23 with backwash outlet valve 22 by backwash water exit branch 21 respectively, backwash water outfall sewer 23 is connected with cesspool 24 and backwash water circulation line 25 simultaneously, is provided with backwashing pump communicating valve 26 on backwash water circulation line 25, and cesspool 24 is connected with carrying out water lines 1 by sewage pump 27 and the 7th pipeline 46, in the present embodiment, also comprise cleaning agent supply device 28, the water inlet of cleaning agent supply device 28 is connected with the outlet of backwashing pump 16, the delivery port of cleaning agent supply device 28 is connected with the import of backwashing pump 16, filter is being carried out in backwash people process like this, by cleaning agent supply device 28, can automatically filtrate cleaning agent be added to this filter, greatly reduce labor strength, improve operating efficiency, in the present embodiment, on filtration cycle pipeline 47, be provided with chemicals feeder 29, in the process that recovered water is filtered, can pass through chemicals feeder 29 dosing in filtered water like this, improve the filter effect of filter to recovered water, in the present embodiment, pre-filtering mechanism 3 comprises sedimentation oil removing pot 30 and Horizontal buffer tank 31, come the outlet of water lines 1 to be connected with the import of sedimentation oil removing pot 30, the outlet of sedimentation oil removing pot 30 is connected with the import of Horizontal buffer tank 31 by the 8th pipeline 48 and the 5th valve 54, the outlet of Horizontal buffer tank 31 is connected with the import of filter-press pump 6 by the first pipeline 4 and the first valve 5, preliminary filtration by sedimentation oil removing pot 30 with Horizontal buffer slow 31, can filter oil field extracted water better, in the present embodiment, described backwashing pump 16 is gas-liquid mixing pump, like this in filtrate backwash process, the automatic air amount of backwashing pump mixes with backwash water, in mixing wastewater with air liquid (gassiness 10-15%), bubble discharges and can effectively peel off petroleum-type and the particle on filtrate, has improved backwash effect,
The filter of described low permeability oil field recovered water filtration system, comprises the steps:
(1) before the operation of low permeability oil field recovered water filtration system, all pump valves are all in closed condition;
(2) open the 5th valve 54, the first valve 5, the second valve 51, filtered water inlet valve 9, filter out water valve 11, start filter-press pump 6 simultaneously, make oil field extracted water successively through carrying out water lines 1, sedimentation oil removing pot 30, the 8th pipeline 48, Horizontal buffer tank 31, the first pipeline 4, filter-press pump 6, the second pipeline 41, filtered water water inlet manifold 7 and each filtered water water inlet pipe 8 enter each filter and filter, water after filter after filtration (claiming again " backwash water ") is again from flowing into filtered water outfall sewer 12 through each filtered water exit branch 10, circulation line 47 and chemicals feeder 29 after filtration again, the water import that circulation line 47 enters filter-press pump 6 after filtration after filter after dosing, filter-press pump 6 will carry out circulating filtration in water input filter after filter again,
(3), when the backwash water of horizontal type backflushing cleaning of evaporator 14 does not reach predetermined water level, open the 3rd valve 52 and the 4th valve 53, and open heat exchanger 13 simultaneously; Now, a backwash water part in filtered water outfall sewer 12 enters heat exchanger 13 through the 3rd pipeline 42, after heat exchanger 13 heating, from the 4th pipeline 43, enter in horizontal type backflushing cleaning of evaporator 14, until the backwash water of horizontal type backflushing cleaning of evaporator 14 reaches after predetermined water level, then close the 3rd valve 52, the 4th valve 53 and heat exchanger 13;
The backwash process of described low permeability oil field recovered water filtration system, comprises the steps:
(1) when the Inlet and outlet water pressure reduction of a certain filter reaches 0.2Mpa, by the filtered water inlet valve of this filter 9 with filter out water valve 11 and close, then open backwashing pump water intaking valve 15, backwashing pump outlet valve 17, backwash water intaking valve 20 and backwash outlet valve 22, start backwashing pump 16 simultaneously, backwashing pump 16 is extracted out the backwash water having heated in horizontal type backflushing cleaning of evaporator 14, and continue to send into this filter along backwash water water inlet manifold 18 and backwash water water inlet pipe 19, after entering the backwash water flushing filtrate in this filter, from the backwash water outlet of this filter, export, and continue to inject cesspool 24 through backwash water exit branch 21 and backwash water outfall sewer 23, this step operation 6 minutes,
(2) after above-mentioned first step finishes, open the backwashing pump communicating valve 26 on backwash water circulation line 25, the backwash water of now exporting from the backwash water outlet of this filter is under the effect of backwashing pump 16, can be successively through backwash water exit branch 21, backwash water outfall sewer 23 and backwash water circulation line 25 flow into backwashing pump 16 from the import of backwashing pump 16, then be backwashed pump 16 from its outlet output, and successively through the 6th pipeline 45, backwash water water inlet manifold 18 and backwash water water inlet pipe 19 enter this filter from the backwash water import of this filter, after entering the backwash water flushing filtrate in this filter, from the backwash water outlet of this filter, export again, repeat this circulation backwash step 16 minutes,
(3) after above-mentioned second step finishes, close the backwashing pump communicating valve 26 on backwash water circulation line 25, now backwashing pump 16 is again extracted the backwash water having heated in horizontal type backflushing cleaning of evaporator 14 out and is continued to send into this filter along backwash water water inlet manifold 23 and backwash water water inlet pipe 21, after entering the backwash water flushing filtrate in this filter, from the backwash water outlet of this filter, export and continue injection cesspool 24 through backwash water exit branch 21 and backwash water outfall sewer 23, this step operation 8 minutes;
(4) after third step finishes, then close backwashing pump water intaking valve 15, backwashing pump outlet valve 17, backwash water intaking valve 20 and backwash outlet valve 22, stop the action of backwashing pump 16 simultaneously.
Above-mentioned backwash process can be carried out abundant backwash to polluting filtrate, and filtrate and pollutant are fully peeled off, and makes material filter activity recovery.

Claims (6)

1. low permeability oil field recovered water filtration system, comprise: carry out water lines, and at least two filters, it is characterized in that: come water lines to be connected with the import of pre-filtering mechanism, the outlet of pre-filtering mechanism is connected with the import of filter-press pump by the first pipeline and the first valve, filter-press delivery side of pump is connected with filtered water water inlet manifold by the second pipeline and the second valve, filtered water water inlet manifold is connected with outlet pipeline simultaneously, filtered water water inlet manifold is connected with the filtered water import of all filters by filtered water water inlet pipe and filtered water inlet valve respectively simultaneously, the filtered water outlet of every filter respectively by filtered water exit branch with filter out water valve and be connected with filtered water outfall sewer simultaneously, filtered water outfall sewer is connected with the import of filter-press pump by filtration cycle pipeline, filtered water outfall sewer is connected with heat exchanger by the 3rd pipeline and the 3rd valve simultaneously, heat exchanger is connected with horizontal type backflushing cleaning of evaporator with the 4th valve by the 4th pipeline, horizontal type backflushing cleaning of evaporator is connected with the import of backwashing pump by the 5th pipeline and backwashing pump water intaking valve, backwash delivery side of pump is connected with backwash water water inlet manifold by the 6th pipeline and backwashing pump outlet valve, backwash water water inlet manifold is connected with the backwash water import of filter with the while by backwash water water inlet pipe and backwash water intaking valve respectively, the backwash water outlet of every filter is connected with backwash water outfall sewer by backwash water exit branch and backwash outlet valve respectively, backwash water outfall sewer is connected with cesspool and backwash water circulation line simultaneously, is provided with backwashing pump communicating valve on backwash water circulation line, and cesspool is connected with carrying out water lines by sewage pump and the 7th pipeline.
2. low permeability oil field recovered water filtration system according to claim 1, it is characterized in that: also comprise cleaning agent supply device, the water inlet of cleaning agent supply device is connected with backwash delivery side of pump, and the delivery port of cleaning agent supply device is connected with the import of backwashing pump.
3. low permeability oil field recovered water filtration system according to claim 1, is characterized in that: on filtration cycle pipeline, be provided with chemicals feeder.
4. low permeability oil field recovered water filtration system according to claim 1, is characterized in that: pre-filtering mechanism comprises sedimentation oil removing pot and Horizontal buffer tank; Come the outlet of water lines to be connected with the import of sedimentation oil removing pot, the outlet of sedimentation oil removing pot is connected with the import of Horizontal buffer tank by the 8th pipeline and the 5th valve, and the outlet of Horizontal buffer tank is connected with the import of filter-press pump by the first pipeline and the first valve.
5. low permeability oil field recovered water filtration system according to claim 1, is characterized in that: described backwashing pump is gas-liquid mixing pump.
6. the backwash process of low permeability oil field recovered water filtration system as claimed in claim 1, comprises the steps:
(1) when the Inlet and outlet water pressure reduction of a certain filter reaches 0.2Mpa, by the filtered water inlet valve of this filter with filter out water valve and close, then open backwashing pump water intaking valve, backwashing pump outlet valve, backwash water intaking valve and backwash outlet valve, start backwashing pump simultaneously, backwashing pump is extracted out the backwash water having heated in horizontal type backflushing cleaning of evaporator, and continue to send into this filter along backwash water water inlet manifold and backwash water water inlet pipe, after entering the backwash water flushing filtrate in this filter, from the backwash water outlet of this filter, export, and continue to inject cesspool through backwash water exit branch and backwash water outfall sewer, this step operation 5-8 minute,
(2) after above-mentioned first step finishes, open the backwashing pump communicating valve on backwash water circulation line, the backwash water of now exporting from the backwash water outlet of this filter is under the effect of backwashing pump, can be successively through backwash water exit branch, backwash water outfall sewer and backwash water circulation line flow into backwashing pump from the import of backwashing pump, then be backwashed pump from its outlet output, and successively through the 6th pipeline, backwash water water inlet manifold and backwash water water inlet pipe enter this filter from the backwash water import of this filter, after entering the backwash water flushing filtrate in this filter, from the backwash water outlet of this filter, export again, repeat this circulation backwash step 13-18 minute,
(3) after above-mentioned second step finishes, close the backwashing pump communicating valve on backwash water circulation line, now backwashing pump is again extracted the backwash water having heated in horizontal type backflushing cleaning of evaporator out and is continued to send into this filter along backwash water water inlet manifold and backwash water water inlet pipe, after entering the backwash water flushing filtrate in this filter, from the backwash water outlet of this filter, export and continue to inject cesspool through backwash water exit branch and backwash water outfall sewer, this step is moved 6-10 minute;
(4) after third step finishes, then close backwashing pump water intaking valve, backwashing pump outlet valve, backwash water intaking valve and backwash outlet valve, stop the action of backwashing pump simultaneously.
CN201410247114.6A 2014-06-06 2014-06-06 Low permeability oil field recovered water filtration system and backwash process thereof Active CN103990313B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105510209A (en) * 2016-02-23 2016-04-20 中国石油化工股份有限公司 Testing device for filtering materials for oil-field wastewater treatment
CN107081003A (en) * 2017-06-10 2017-08-22 武汉中舟环保设备股份有限公司 A kind of river filter peculiar to vessel and its from purging method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992022374A1 (en) * 1991-06-14 1992-12-23 Caustec Ab Control system
CN201684486U (en) * 2009-12-08 2010-12-29 温州海米特集团有限公司 Line internal backwashing filtering system
CN203620379U (en) * 2013-11-22 2014-06-04 中国石油天然气股份有限公司 Continuous constant-pressure filter device for oil field water injection

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992022374A1 (en) * 1991-06-14 1992-12-23 Caustec Ab Control system
CN201684486U (en) * 2009-12-08 2010-12-29 温州海米特集团有限公司 Line internal backwashing filtering system
CN203620379U (en) * 2013-11-22 2014-06-04 中国石油天然气股份有限公司 Continuous constant-pressure filter device for oil field water injection

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105510209A (en) * 2016-02-23 2016-04-20 中国石油化工股份有限公司 Testing device for filtering materials for oil-field wastewater treatment
CN105510209B (en) * 2016-02-23 2018-03-02 中国石油化工股份有限公司 A kind of disposing polluted water in oil filtering material experimental rig
CN107081003A (en) * 2017-06-10 2017-08-22 武汉中舟环保设备股份有限公司 A kind of river filter peculiar to vessel and its from purging method

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