CN103990313B - Low permeability oil field recovered water filtration system and backwash process thereof - Google Patents
Low permeability oil field recovered water filtration system and backwash process thereof Download PDFInfo
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- CN103990313B CN103990313B CN201410247114.6A CN201410247114A CN103990313B CN 103990313 B CN103990313 B CN 103990313B CN 201410247114 A CN201410247114 A CN 201410247114A CN 103990313 B CN103990313 B CN 103990313B
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Abstract
The invention discloses low permeability oil field recovered water filtration system, comprise at least two filters, carry out water lines to be connected with pre-filtering mechanism, pre-filtering mechanism is connected with filter-press pump, filter-press pump is connected with filtered water water inlet manifold, filtered water water inlet manifold is connected with outlet pipeline, filtered water water inlet manifold is connected with all filters, every platform filter is connected with filtered water outfall sewer, filtered water outfall sewer is connected with filter-press pump, filtered water outfall sewer is connected with heat exchanger simultaneously, heat exchanger is connected with horizontal type backflushing cleaning of evaporator, horizontal type backflushing cleaning of evaporator is connected with backwashing pump, backwashing pump is connected with backwash water water inlet manifold, backwash water water inlet manifold is connected with the backwash water import of all filters, every platform filter is connected with backwash water outfall sewer, backwash water outfall sewer is connected with cesspool and backwash water circulation line, and backwash water circulation line is provided with backwashing pump communicating valve, cesspool with carry out water lines and be connected.The present invention has the filtration advantage effective with backwash.
Description
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
-3μm
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 there is not the filtration system that low permeability oil field produced water treatment can be filtered to and adapt to oil field and require at present; The inefficacy and the filtrate due to filter in use easily hardens, and then cause that low permeability oil field recovered water filtration system can not normally be run, 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 to oil field extracted water good filtration effect and backwash process thereof.
For achieving the above object, present invention employs following technical scheme: described low permeability oil field recovered water filtration system, comprise: carry out water lines, and at least two filters, carry out water lines to be connected with the import of pre-filtering mechanism, the outlet of pre-filtering mechanism is connected with the import of the first valve with filter-press pump by the first pipeline, filter-press delivery side of pump is connected with filtered water water inlet manifold with the second valve by the second pipeline, 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 with filtered water inlet valve respectively by filtered water water inlet pipe simultaneously, the filtering water outlet of every platform filter is connected with filtered water outfall sewer with the while of filtering out water valve respectively by filtered water exit branch, filtered water outfall sewer is connected by the import of filtration cycle pipeline with filter-press pump, filtered water outfall sewer is connected with heat exchanger with the 3rd valve by the 3rd pipeline 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 with backwashing pump water intaking valve by the 5th pipeline, backwash delivery side of pump is connected with backwash water water inlet manifold with backwashing pump outlet valve by the 6th pipeline, backwash water water inlet manifold respectively by backwash water water inlet pipe and backwash water intaking valve be connected with the backwash water import of filter simultaneously, the backwash water outlet of every platform filter is connected with backwash water outfall sewer with backwash outlet valve respectively by backwash water exit branch, backwash water outfall sewer is connected with cesspool and backwash water circulation line simultaneously, and backwash water circulation line is provided with backwashing pump communicating valve, cesspool by sewage pump and the 7th pipeline with carry out water lines and be connected.
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; The outlet carrying out water lines is 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 with the 5th valve by the 8th pipeline, and the outlet of Horizontal buffer tank is connected with the import of the first valve with filter-press pump by the first pipeline.
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 backwashing pump water intaking valve is opened, backwashing pump outlet valve, backwash water intaking valve and backwash outlet valve, start backwashing pump simultaneously, the backwash water heated in horizontal type backflushing cleaning of evaporator is extracted out by backwashing pump, and continue to send into this filter along backwash water water inlet manifold and backwash water water inlet pipe, backwash water outlet from this filter after the backwash water entered in this filter rinses filtrate exports, and continue to inject cesspool through backwash water exit branch and backwash water outfall sewer, this step runs 5-8 minute,
(2) after above-mentioned first step terminates, open the backwashing pump communicating valve on backwash water circulation line, now export the backwash water of output under the effect of backwashing pump from the backwash water of this filter, can 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 to export from its outlet, 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, the backwash water outlet of the backwash water entered in this filter again from this filter after rinsing filtrate exports, repeat this circulation backwash step 13-18 minute,
(3) after above-mentioned second step terminates, close the backwashing pump communicating valve on backwash water circulation line, now the backwash water heated in horizontal type backflushing cleaning of evaporator is extracted out and is continued to send into this filter along backwash water water inlet manifold and backwash water water inlet pipe by backwashing pump again, export from the backwash water outlet of this filter after the backwash water entered in this filter rinses filtrate and continue to inject cesspool through backwash water exit branch and backwash water outfall sewer, this step runs 6-10 minute;
(4) after third step terminates, 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.
By the enforcement of technique scheme, the invention has the beneficial effects as follows: to the good filtration effect of oil field extracted water, and when after the losing efficacy of filtrating box in filter, filtrate can be made thoroughly to 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.
Detailed description of the invention
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, include three filters, i.e. the first filter 2, second filter 21 and the 3rd filter 211, wherein two filter work, an other filter is for subsequent use; carry out 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 with the first valve 5 by the first pipeline 4, the outlet of filter-press pump 6 is connected with filtered water water inlet manifold 7 with the second valve 51 by the second pipeline 41, filtered water water inlet manifold 7 is connected with outlet pipeline 49, outlet pipeline 49 is provided with the 6th valve 55, filtered water water inlet manifold 7 is also connected with the filtered water import of all filters with filtered water inlet valve 9 respectively by filtered water water inlet pipe 8 simultaneously, the filtering water outlet of every platform filter is connected with filtered water outfall sewer 12 with the while of filtering out water valve 11 respectively by filtered water exit branch 10, filtered water outfall sewer 12 is connected by the import of filtration cycle pipeline 47 with filter-press pump 6, filtered water outfall sewer 12 is also connected with heat exchanger 13 with the 3rd valve 52 by the 3rd pipeline 42, 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 water intaking valve 15 with backwashing pump 16 by the 5th pipeline 44, the outlet of backwashing pump 16 is connected with backwash water water inlet manifold 18 with backwashing pump outlet valve 17 by the 6th pipeline 45, backwash water water inlet manifold 18 is connected with the backwash water import of each filter with backwash water intaking valve 20 respectively by backwash water water inlet pipe 19, the backwash water outlet of every platform filter is connected with backwash water outfall sewer 23 with backwash outlet valve 22 respectively by backwash water exit branch 21, backwash water outfall sewer 23 is connected with cesspool 24 and backwash water circulation line 25 simultaneously, and backwash water circulation line 25 is provided with backwashing pump communicating valve 26, cesspool 24 by sewage pump 27 and the 7th pipeline 46 with carry out water lines 1 and be connected, 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, automatically filtrate cleaning agent can be added to this filter by cleaning agent supply device 28, greatly reduce labor strength, improve operating efficiency, in the present embodiment, filtration cycle pipeline 47 is provided with chemicals feeder 29, like this in the process that recovered water is filtered, can chemicals feeder 29 dosing in filtered water be passed through, improve filter to the filter effect of recovered water, in the present embodiment, pre-filtering mechanism 3 comprises sedimentation oil removing pot 30 and Horizontal buffer tank 31, the outlet carrying out water lines 1 is 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 with the 5th valve 54 by the 8th pipeline 48, the outlet of Horizontal buffer tank 31 is connected with the import of filter-press pump 6 with the first valve 5 by the first pipeline 4, delayed the preliminary filtration of 31 by sedimentation oil removing pot 30 and Horizontal buffer, 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, backwashing pump automatically sucks air and mixes with backwash water, in mixing wastewater with air liquid (gassiness 10-15%), bubble discharges the petroleum-type and particle that can effectively peel off on filtrate, improves backwash effect,
The filter of described low permeability oil field recovered water filtration system, comprises the steps:
(1) before low permeability oil field recovered water filtration system is run, all pump valves are all in closed condition;
(2) the 5th valve 54 is opened, first valve 5, 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, 8th pipeline 48, Horizontal buffer tank 31, first pipeline 4, filter-press pump 6, second pipeline 41, filtered water water inlet manifold 7 and each filtered water water inlet pipe 8 enter each filter and filter, after filter after filtration, water (also known as " backwash water ") flows into filtered water outfall sewer 12 from through each filtered water exit branch 10 again, circulation line 47 and chemicals feeder 29 after filtration again, after filter after dosing water after filtration circulation line 47 enter the import of filter-press pump 6, filter-press pump 6 carries out circulating filtration by 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, enter in horizontal type backflushing cleaning of evaporator 14 from the 4th pipeline 43 after heat exchanger 13 heats, until after the backwash water of horizontal type backflushing cleaning of evaporator 14 reaches 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 9 of this filter with filter out water valve 11 and close, then backwashing pump water intaking valve 15 is opened, backwashing pump outlet valve 17, backwash water intaking valve 20 and backwash outlet valve 22, start backwashing pump 16 simultaneously, the backwash water heated in horizontal type backflushing cleaning of evaporator 14 is extracted out by backwashing pump 16, and continue to send into this filter along backwash water water inlet manifold 18 and backwash water water inlet pipe 19, backwash water outlet from this filter after the backwash water entered in this filter rinses filtrate exports, and continue to inject cesspool 24 through backwash water exit branch 21 and backwash water outfall sewer 23, this step runs 6 minutes,
(2) after above-mentioned first step terminates, open the backwashing pump communicating valve 26 on backwash water circulation line 25, now export the backwash water of output under the effect of backwashing pump 16 from the backwash water of this filter, can 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 to export from its outlet, 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, the backwash water outlet of the backwash water entered in this filter again from this filter after rinsing filtrate exports, repeat this circulation backwash step 16 minutes,
(3) after above-mentioned second step terminates, close the backwashing pump communicating valve 26 on backwash water circulation line 25, now the backwash water heated in horizontal type backflushing cleaning of evaporator 14 is extracted out and is continued to send into this filter along backwash water water inlet manifold 23 and backwash water water inlet pipe 21 by backwashing pump 16 again, export from the backwash water outlet of this filter after the backwash water entered in this filter rinses filtrate and continue to inject cesspool 24 through backwash water exit branch 21 and backwash water outfall sewer 23, this step runs 8 minutes;
(4) after third step terminates, 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 carry out abundant backwash to pollution filtrate, filtrate and pollutant is fully peeled off, and makes material filter activity recovery.
Claims (5)
1. low permeability oil field recovered water filtration system, comprise: carry out water lines, and at least two filters, it is characterized in that: carry out water lines and be connected with the import of pre-filtering mechanism, the outlet of pre-filtering mechanism is connected with the import of the first valve with filter-press pump by the first pipeline, filter-press delivery side of pump is connected with filtered water water inlet manifold with the second valve by the second pipeline, 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 with filtered water inlet valve respectively by filtered water water inlet pipe simultaneously, the filtering water outlet of every platform filter is connected with filtered water outfall sewer with the while of filtering out water valve respectively by filtered water exit branch, filtered water outfall sewer is connected by the import of filtration cycle pipeline with filter-press pump, filtered water outfall sewer is connected with heat exchanger with the 3rd valve by the 3rd pipeline 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 with backwashing pump water intaking valve by the 5th pipeline, backwash delivery side of pump is connected with backwash water water inlet manifold with backwashing pump outlet valve by the 6th pipeline, backwash water water inlet manifold respectively by backwash water water inlet pipe and backwash water intaking valve be connected with the backwash water import of filter simultaneously, the backwash water outlet of every platform filter is connected with backwash water outfall sewer with backwash outlet valve respectively by backwash water exit branch, backwash water outfall sewer is connected with cesspool and backwash water circulation line simultaneously, backwash water circulation line is provided with backwashing pump communicating valve, cesspool by sewage pump and the 7th pipeline with carry out water lines and be connected, 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.
2. 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.
3. 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; The outlet carrying out water lines is 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 with the 5th valve by the 8th pipeline, and the outlet of Horizontal buffer tank is connected with the import of the first valve with filter-press pump by the first pipeline.
4. low permeability oil field recovered water filtration system according to claim 1, is characterized in that: described backwashing pump is gas-liquid mixing pump.
5. 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 backwashing pump water intaking valve is opened, backwashing pump outlet valve, backwash water intaking valve and backwash outlet valve, start backwashing pump simultaneously, the backwash water heated in horizontal type backflushing cleaning of evaporator is extracted out by backwashing pump, and continue to send into this filter along backwash water water inlet manifold and backwash water water inlet pipe, backwash water outlet from this filter after the backwash water entered in this filter rinses filtrate exports, and continue to inject cesspool through backwash water exit branch and backwash water outfall sewer, this step runs 5-8 minute,
(2) after above-mentioned first step terminates, open the backwashing pump communicating valve on backwash water circulation line, now export the backwash water of output under the effect of backwashing pump from the backwash water of this filter, can 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 to export from its outlet, 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, the backwash water outlet of the backwash water entered in this filter again from this filter after rinsing filtrate exports, repeat this circulation backwash step 13-18 minute,
(3) after above-mentioned second step terminates, close the backwashing pump communicating valve on backwash water circulation line, now the backwash water heated in horizontal type backflushing cleaning of evaporator is extracted out and is continued to send into this filter along backwash water water inlet manifold and backwash water water inlet pipe by backwashing pump again, export from the backwash water outlet of this filter after the backwash water entered in this filter rinses filtrate and continue to inject cesspool through backwash water exit branch and backwash water outfall sewer, this step runs 6-10 minute;
(4) after third step terminates, 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.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410247114.6A CN103990313B (en) | 2014-06-06 | 2014-06-06 | Low permeability oil field recovered water filtration system and backwash process thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410247114.6A CN103990313B (en) | 2014-06-06 | 2014-06-06 | Low permeability oil field recovered water filtration system and backwash process thereof |
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| CN103990313B true CN103990313B (en) | 2015-08-12 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN107362607A (en) * | 2016-05-13 | 2017-11-21 | 江苏瑞盛水处理有限公司 | A kind of new automatic endogenous back-flushing filtering system |
| 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 |
| CN107376647B (en) * | 2017-09-13 | 2023-07-25 | 新地能源工程技术有限公司 | Open circulating water side filtering device and circulating water treatment method using same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| NO172882C (en) * | 1991-06-14 | 1993-09-22 | Goetaverken Energy Ab | PROCEDURE FOR REGULATING A FILTERING DEVICE |
| 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 |
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