CN101987770A - Method for removing hydrogen sulfide from oil field injection water - Google Patents
Method for removing hydrogen sulfide from oil field injection water Download PDFInfo
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- CN101987770A CN101987770A CN 201010253342 CN201010253342A CN101987770A CN 101987770 A CN101987770 A CN 101987770A CN 201010253342 CN201010253342 CN 201010253342 CN 201010253342 A CN201010253342 A CN 201010253342A CN 101987770 A CN101987770 A CN 101987770A
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Abstract
The invention relates to a method for removing hydrogen sulfide from oil field injection water. The technical scheme of the method comprises the following steps of: opening an original sewage injection closed processing system, performing two-stage aeration and adding autrophic desulphurizing bacterium and aerobic heterotrophic bacterium, reducing the hydrogen sulfide content in the injection water through aerobic oxidization of thiophilic rhodovulum, and reducing the content of sulfate reducing bacterium through the action of oxygen and biological competition action of aerobic heterotrophic bacterium to avoid generating new hydrogen sulfide, therefore, hydrogen sulfide in the injection water is removed. The method has the advantages that: the hydrogen sulfide content in the water is low, the nutrition needed for growth of the sulfate reducing bacterium is simultaneously removed, the re-growth of the sulfate reducing bacterium is avoided, and the contents of the hydrogen sulfide and the sulfate reducing bacterium in the injection water do not rebound. Furthermore, the method has low processing cost without secondary pollution to the environment.
Description
One, technical field:
The present invention relates to a kind of wastewater biochemical processing technology field, particularly a kind of method that removes the hydrogen sulfide in the oil field reinjection water.
Two, background technology:
Along with continually developing of oil field, extraction liquid is moisture more and more higher, the re-injection after treatment of the oily(waste)water of most of extraction.But generally contain the hydrogen sulfide and the sulphate reducing bacteria of higher concentration in the re-injection water, aggravated the corrosion of water injection equipment and tubing string, cause potential safety hazard, increased the production cost in oil field.
At this situation, the method of hydrogen sulfide mainly is a physico-chemical process in the current removal waste water, comprise methods such as direct stripping, aeration oxidation, chemical oxidation, chemical precipitation and absorption, all there is the high problem of processing costs in these methods in the processing reuse process of oil field extracted water, and cause second environmental pollution easily.For sulphate reducing bacteria, main employing adds the method for sterilant, can reduce the content of sulphate reducing bacteria in the sewage to a certain extent, but still there are many problems, sulphate reducing bacteria improves the adaptability of medicine on the one hand, and the consumption of sterilant is increasing, and effect worse and worse; There is the utilizable nutrition of sulphate reducing bacteria on the other hand in the re-injection water, quickened growing of sulphate reducing bacteria.
Three, summary of the invention:
Purpose of the present invention is exactly the above-mentioned defective that exists at prior art, a kind of method that removes the hydrogen sulfide in the oil field reinjection water is provided, adopt in the re-injection water after present method is handled and do not contain hydrogen sulfide and sulphate reducing bacteria, the water of re-injection does not simultaneously contain the required nutrition of bacterial growth, this aseptic apotrophic water enters waterflood system, water injection pipe in annotating remaining bacterium especially sulphate reducing bacteria with nutrition for want of and hungry death, form gnotobasis in the water injection string gradually, thus the thoroughly harm of removal of hydrogen sulfide generation.
Its technical scheme is made up of following steps:
(1), re-injection water water quality analysis: analyze various ion, total nitrogen, total phosphorus, hydrogen sulfide content, sulfate reduction bacterial content in the re-injection water;
(2), screening autotrophy desulfurization bacterium and aerobic heterotrophic bacterium bacterial classification: according to re-injection water Analysis Results of Water Quality, screen two class bacterial classifications: the one, can efficiently utilize the autotrophy desulfurization bacterium of hydrogen sulfide, remove hydrogen sulfide in the re-injection water, another kind is to utilize organic aerobic heterotrophic bacterium in the re-injection water fast, play the mesotrophic effect of re-injection water that consumes, eliminate the required nutritive substance of sulfate reduction bacteria growing, suppress its growth;
(3), processing parameter is determined in indoor TSA experiment: be to add the autotrophy desulfurization bacterium in the one-level aeration tank, in two-stage aeration tank, add aerobic heterotrophic bacterium, determine processing parameters such as the best dosage of best aeration rate, bacterial classification and aeration time according to hydrogen sulfide content and sulfate reduction bacterial content;
(4), on-the-spot dynamic testing, on the basis of shop experiment, further optimize every processing parameter, determine aeration system, aeration mode, the aeration tank volume.
Above-mentioned autotrophy desulfurization bacterium adopts has a liking for little red oomycetes of sulphur (Rhodovulum sulfidophilum) and/or thiobacillus ferrooxidant bacterial classifications such as (Thiobacillus ferrooxidans); Described aerobic heterotrophic bacterium bacterial classification adopts genus bacillus (Bacillus sp.) and/or planococcus bacterial classifications such as (Planococcus sp.).
The present invention compares with the existing method that removes re-injection water cure hydrogen, its beneficial effect is: because the autotrophy desulfurization bacterium need not add extra carbon source and efficient oxidation hydrogen sulfide, hydrogen sulfide content is extremely low in the water after present method is handled, eliminated the required nutrition of sulfate reduction bacteria growing simultaneously, thoroughly eliminated growing once more of sulphate reducing bacteria, hydrogen sulfide content and sulfate reduction bacterial content do not have a rebound in the re-injection water; In addition, this method processing cost is lower, does not cause second environmental pollution.
Four, description of drawings:
Accompanying drawing 1 is hydrogen sulfide content and the sulfate reduction bacterial content indicator card in former return water of the present invention and the aeration tank;
Accompanying drawing 2 is the variation diagram of hydrogen sulfide content in the test in place of the present invention.
Five, embodiment:
The return water that the present invention handles in the initial station with Shengli Oil Field oil recovery factory purifying return water is an example.
At first, its return water is carried out water quality analysis.
Purifying return water Analysis Results of Water Quality is as follows:
According to the hydrochemistry analytical results in the last table, screening can utilize the autotrophy desulfurization bacterium of hydrogen sulfide and be the fast aerobic heterotrophic bacterium of growth of nutrition with organism in the sewage.
The basic technology parameter that laboratory experiment is determined is: aeration tank dissolved oxygen content 3mg/L, aeration time are 8 hours, and the add-on of autotrophy desulfurization bacterium is 0.2%, and aerobic heterotrophic bacterium add-on is 0.1%.
Above-mentioned autotrophy desulfurization bacterium adopts has a liking for little red oomycetes of sulphur (Rhodovulum sulfidophilum) and/or thiobacillus ferrooxidant bacterial classifications such as (Thiobacillus ferrooxidans); Described aerobic heterotrophic bacterium bacterial classification adopts genus bacillus (Bacillus sp.) and/or planococcus bacterial classifications such as (Planococcus sp.).
Test in place is dynamically carried out, and return water constantly enters the aeration tank by former processing flow process, and continuously outflows, and it is 8 hours that control stops the reaction times, and the aeration tank oxygen level is 3mg/L, and stage on-test adds 0.2% autotrophy desulfurization bacterium and 0.1% aerobic heterotrophic bacterium.Experiment has been carried out 15 days, detects hydrogen sulfide content and sulfate reduction bacterial content in former return water and the aeration tank every day, sees accompanying drawing 1.The sulphate reducing bacteria content is bigger in the former return water, 10
3Individual/more than the mL, and in the aeration tank sulphate reducing bacteria stable content 0.
The variation of hydrogen sulfide content in the test in place is with reference to accompanying drawing 2.
The sewage sampling detects dissolved oxygen content in the aeration tank, and anerobic sowage is placed, and timing sampling detects dissolved oxygen content, and hydrogen sulfide content and sulfate reduction bacterial content see the following form.
Biological deoxygenation test-results
As can be seen, through the aeration tank, hydrogen sulfide content is reduced to 0 by 158mg/L in the re-injection water, and the sulfate reduction bacterial content is reduced to 0 by average 4500/mL.Anaerobism places that re-injection water oxygen content is reduced to 0.01mg/L after 4 hours.
To adopt the water sample after present method is handled to insert 5% activated sulphate reducing bacteria, cultivating and detecting hydrogen sulfide content after 15 days is 0, the sulfate reduction bacterial content is 0, shows that the water sample that adopts after present method is handled has been not suitable for the growth of sulphate reducing bacteria, has avoided the generation once more of hydrogen sulfide.
Claims (2)
1. method that removes the hydrogen sulfide in the oil field reinjection water is characterized in that being made up of following steps:
(1), re-injection water water quality analysis: analyze various ion, total nitrogen, total phosphorus, hydrogen sulfide content, sulfate reduction bacterial content in the re-injection water;
(2), screening autotrophy desulfurization bacterium and aerobic heterotrophic bacterium bacterial classification: according to re-injection water Analysis Results of Water Quality, screen two class bacterial classifications: the one, can efficiently utilize the autotrophy desulfurization bacterium of hydrogen sulfide, remove hydrogen sulfide in the re-injection water, another kind is to utilize organic aerobic heterotrophic bacterium in the re-injection water fast, play the mesotrophic effect of re-injection water that consumes, eliminate the required nutritive substance of sulfate reduction bacteria growing, suppress its growth;
(3), processing parameter is determined in indoor TSA experiment: be to add the autotrophy desulfurization bacterium in the one-level aeration tank, in two-stage aeration tank, add aerobic heterotrophic bacterium, determine processing parameters such as the best dosage of best aeration rate, bacterial classification and aeration time according to hydrogen sulfide content and sulfate reduction bacterial content;
(4), on-the-spot dynamic testing, on the basis of shop experiment, further optimize every processing parameter, determine aeration system, aeration mode, the aeration tank volume.
2. the method that removes the hydrogen sulfide in the oil field reinjection water according to claim 1 is characterized in that: described autotrophy desulfurization bacterium adopts has a liking for the little red oomycetes of sulphur and both combinations of thiobacillus ferrooxidant any one or its; Described aerobic heterotrophic bacterium bacterial classification adopts any one or its both combinations of bacterial classifications such as genus bacillus and planococcus.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104310595A (en) * | 2014-10-27 | 2015-01-28 | 中国石油化工股份有限公司 | Method for maintaining viscosity of polymer solution prepared by sewage in oil field |
| CN104357035A (en) * | 2014-10-23 | 2015-02-18 | 中国石油化工股份有限公司 | Biological bactericide for preventing and controlling SRB (sulfate reducing bacteria) in high-temperature water body and SRB inhibition method of bactericide |
| CN109399795A (en) * | 2017-08-15 | 2019-03-01 | 中国石油化工股份有限公司 | Circulating water cooling treatment system and its method of application and circulating water cooling treatment |
| CN109422356A (en) * | 2017-08-29 | 2019-03-05 | 中国石油化工股份有限公司 | Circulating cooling water containing sulfur composition for treating and its application |
| CN109422354A (en) * | 2017-08-29 | 2019-03-05 | 中国石油化工股份有限公司 | Circulating cooling water containing sulfur processing system and its application |
| CN109422351A (en) * | 2017-08-29 | 2019-03-05 | 中国石油化工股份有限公司 | Circulating cooling water containing sulfur processing system and its application |
| CN111517482A (en) * | 2020-06-19 | 2020-08-11 | 华辰环保能源(广州)有限责任公司 | Method for controlling sulfide in oil field sewage |
| CN111574252A (en) * | 2020-04-28 | 2020-08-25 | 廊坊卓基恒然农业科技有限公司 | Method for producing efficient environment-friendly biological organic fertilizer by using livestock and poultry manure |
| CN113571137A (en) * | 2021-06-25 | 2021-10-29 | 上海环境卫生工程设计院有限公司 | Method for determining influence of environmental pH value on heterotrophic bacteria activity by adopting mathematical model |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104357035A (en) * | 2014-10-23 | 2015-02-18 | 中国石油化工股份有限公司 | Biological bactericide for preventing and controlling SRB (sulfate reducing bacteria) in high-temperature water body and SRB inhibition method of bactericide |
| CN104357035B (en) * | 2014-10-23 | 2017-04-12 | 中国石油化工股份有限公司 | Biological bactericide for preventing and controlling SRB (sulfate reducing bacteria) in high-temperature water body and SRB inhibition method of bactericide |
| CN104310595A (en) * | 2014-10-27 | 2015-01-28 | 中国石油化工股份有限公司 | Method for maintaining viscosity of polymer solution prepared by sewage in oil field |
| CN109399795A (en) * | 2017-08-15 | 2019-03-01 | 中国石油化工股份有限公司 | Circulating water cooling treatment system and its method of application and circulating water cooling treatment |
| CN109399795B (en) * | 2017-08-15 | 2020-07-21 | 中国石油化工股份有限公司 | System for treating circulating cooling water, application thereof and method for treating circulating cooling water |
| CN109422356A (en) * | 2017-08-29 | 2019-03-05 | 中国石油化工股份有限公司 | Circulating cooling water containing sulfur composition for treating and its application |
| CN109422354A (en) * | 2017-08-29 | 2019-03-05 | 中国石油化工股份有限公司 | Circulating cooling water containing sulfur processing system and its application |
| CN109422351A (en) * | 2017-08-29 | 2019-03-05 | 中国石油化工股份有限公司 | Circulating cooling water containing sulfur processing system and its application |
| CN111574252A (en) * | 2020-04-28 | 2020-08-25 | 廊坊卓基恒然农业科技有限公司 | Method for producing efficient environment-friendly biological organic fertilizer by using livestock and poultry manure |
| CN111517482A (en) * | 2020-06-19 | 2020-08-11 | 华辰环保能源(广州)有限责任公司 | Method for controlling sulfide in oil field sewage |
| CN113571137A (en) * | 2021-06-25 | 2021-10-29 | 上海环境卫生工程设计院有限公司 | Method for determining influence of environmental pH value on heterotrophic bacteria activity by adopting mathematical model |
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Application publication date: 20110323 |