CN104773893A - Gas production wastewater treatment process - Google Patents
Gas production wastewater treatment process Download PDFInfo
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- CN104773893A CN104773893A CN201510171585.8A CN201510171585A CN104773893A CN 104773893 A CN104773893 A CN 104773893A CN 201510171585 A CN201510171585 A CN 201510171585A CN 104773893 A CN104773893 A CN 104773893A
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- waste water
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Abstract
The invention discloses a gas production wastewater treatment process, which mainly comprises the following steps: A, advanced oxidation; B, coagulation; C, air stripping; and D, decompressed evaporation. The gas production wastewater treatment process provided by the invention solves the problems of high invested cost, poor treatment effect, complicated preparation process and narrow application scope in the prior art, improves the treatment effect, reduces the treatment cost well, and expands the application scope better.
Description
Technical field
The present invention relates to a kind of waste water treatment process, be specifically related to the waste water treatment process that a kind of foam gas production used in oil-gas field produces.
Background technology
At present, foam production gas technology is commonly employed in oil-gas field water pumping gas production, foam production gas technology foam discharging agent is injected air water with adopting well, after shaft bottom liquid is contacted with foam discharging agent, by the stirring of natural gas flow, generate a large amount of low density resistance aqueous foam, foam takes water with air-flow from shaft bottom to ground, reach stable, increase production and extend the object of its flush stage.Foam discharging agent can reduce local water surface tension, reduces density, reduces the resistance that eddy current causes, and bottom-hole cleaning.
And a large amount of waste water will discharged with air-flow in foam drainage gas recovery process, this waste water is then called bubble draining.Because the foam discharging agent injecting stratum has the tensio-active agent and high molecular polymer that there are specific function in a large number, so the water quality complicated of the bubble draining of discharging, containing more surfactant, calcium ions and magnesium ions, soluble solid etc., COD is higher.At normal temperatures in white " milky " liquid status, emulsification degree is high, has light diesel oil, very easily bubbles, and foam volume is large, and antifoaming speed is slow.
If this kind of unprocessed direct discharge of sewage will cause serious pollution to environment.Data shows, if in this kind of waste water draining water body environment, its biodegradation process can cause the exhaustion of dissolved oxygen in water and mineral substance, causes the eutrophication of water body.Wherein contained tensio-active agent also significantly can reduce the interfacial tension between soil-water, causes soil aggregate loss of stability, produces serious influence to crop yield.Effective process of foam drilling waste water, for protection of the environment, keeps ecological balance, and promotes economic development and all has great significance.
Existing treatment technology is: (1) foam separation-reduced pressure distillation technique; (2) coagulation-oxidation-absorption method; (3) froth breaking breakdown of emulsion-biodegradation technique.Its defect is specific as follows:
The influence factor of foam separation-reduced pressure distillation technique is many, as the pH value of solution, and surfactant concentration, temperature, gas velocity, ionic strength.In addition, the character, floor height, row's foam mode, stirring etc. of foam are also the factors affecting foam separation.The use face that too much influence factor result in foam separating technology is very little, the bubble draining of current oil-gas field is all high surfactant, utilize foamet can produce a large amount of foam during excessive concentration, affect treatment effect, and simple foam separating technology can not dispose other pollution substances in bubble draining, causes treatment effect not good.
Coagulation-oxidation-absorption method is the treatment process utilizing multiple monotechnics to combine.It can stepwise disposal bubble draining in pollution substance, progressively reduce intractability.But the difficulty of coagulation-oxidation-absorption method is oxygenant and the reaction conditions of selecting suitable Coagulation and Adsorption agent and the best, further, experimental result shows, the pH value of waste water, the add-on for the treatment of agent, the action time for the treatment of agent etc., the removal for COD all had certain influence.The Coagulation and Adsorption agent of current use and the processing cost of oxygenant higher, be badly in need of research more economical effect more preferably medicament.
Froth breaking breakdown of emulsion-biodegradation technique is mainly to utilize defoamer to suppress the generation of foam, reach the object eliminating foam, recycling emulsion splitter destroys the emulsified state of bubble draining, reach the object of oily water separation, the shortcoming of this technology is that defoamer is only the generation that inhibit foam, the effect of removing tensio-active agent in bubble draining can not be played, and emulsion splitter can only abolish part emulsified in bubble draining, the pollutent of other kinds wherein contained then can not be removed, and will increase the intractability of subsequent bio degraded like this.And the intractability in biological degradation is to select suitable microorganism, the condition affecting microbe survival is also harsher, and generally speaking, condition is harsh to use the shortcoming of technique to be, narrow application range, treatment effect is not good.
Summary of the invention
The object of the present invention is to provide gas production waste water treatment process, overcome the problems referred to above, well improve the effect of process, reduce the cost of process, better improve the scope of application simultaneously.
To achieve these goals, the technical solution used in the present invention is as follows:
Gas production waste water treatment process, mainly comprises the following steps:
A, advanced oxidation;
B, coagulation;
C, stripping;
D, reduction vaporization.
Advanced oxidation in steps A adopts Fenton oxidation method, and this Fenton oxidation method is that gas production adds by hydrogen peroxide and FeSO in waste water
4the Fenton reagent of composition, Fenton reagent produces active hydroxyl free radical in acid condition, and accelerate the oxidation of organism and reducing substances, this step is to COD and NH
3the clearance of-N is between 70%-80%.
Described steps A also can add catalyzer when carrying out Fenton oxidation method, and described catalyzer is Manganse Dioxide, gac or modification sulphonation titanium cyanines, and the optimal ph that steps A is carried out is 3.5, FeSO in Fenton reagent
4with H
2o
2optimum proportioning be 1:3, drop into 1g FeSO in often liter of gas production waste water
4with 2ml H
2o
2.
Step B coagulation is the general name of cohesion and flocculation; concrete grammar adds PAC and PAM in the gas production waste water through steps A; PAC and PAM makes fine suspension or colloidal particle in water adsorb mutually and is combined into larger particles, and then precipitate from water, this step is to COD and NH
3the clearance of-N is 50%-60%.
First alkalescence on the weak side was adjusted to by counter for the pH of liquid before carrying out step B coagulation, the effect of coagulation that can make like this improves 50%-80%, wherein the consumption of PAC is the consumption of 50-100ppm, PAM is 5-20ppm, in coagulation process, also can add the coagulant aidss such as calcium carbonate.
Step C stripping utilizes foam separation or pneumatically supported method, gets rid of the gas of the tensio-active agent in gas production waste water water, small-molecule substance and irritant smell, by reducing the NH in water after stripping process
3-N, and remove smell, this step is to NH
3the clearance of-N is about 50%.
The negative pressure value of step D reduction vaporization is 0.01MPa.
Also can arrange a mixing step before described step D, this mixing step is mixed with Yuan Shui by the gas production waste water after step C process.
The present invention compared with prior art, has the following advantages and beneficial effect:
Present invention reduces the impact of external factor on whole treating processes; various different waste water can be adapted to; improve the scope of application, method overall simple, the treatment effect of each step all clearly; have good result of use; the cost of input required for the present invention is lower simultaneously, and economic worth is high, better can promote the development of industry; better protect environment simultaneously, reduce enterprise produces discharge environment impact on periphery.
Embodiment
Below in conjunction with form and embodiment, the invention will be further described, and embodiments of the present invention include but not limited to the following example.
Embodiment
Gas production waste water treatment process, mainly comprises the following steps:
A, advanced oxidation;
Advanced oxidation in steps A adopts Fenton oxidation method, and this Fenton oxidation method is that gas production adds by hydrogen peroxide and FeSO in waste water
4the Fenton reagent of composition, Fenton reagent produces active hydroxyl free radical in acid condition, and accelerate the oxidation of organism and reducing substances, this step is to COD and NH
3the clearance of-N is between 70%-80%.Also can add catalyzer when carrying out Fenton oxidation method, described catalyzer is manganese oxide, gac or modification sulphonation titanium cyanines, and the optimal ph that rapid A carries out is 3.5, FeSO in Fenton reagent
4with H
2o
2optimum proportioning be 1:3, drop into 1g FeSO in often liter of gas production waste water
4with 2ml H
2o
2.Following table is the water-quality guideline of the gas production waste water after steps A:
Table 1
| Project | CODcr(mg/L) | Cl-(mg/L) | pH | NH 3-N(mg/L) | Colourity |
| Bubble draining | 8372 | 6634 | 3.75 | 179 | —— |
B, coagulation;
Step B coagulation is the general name of cohesion and flocculation; concrete grammar adds PAC and PAM in the gas production waste water through steps A; PAC and PAM makes fine suspension or colloidal particle in water adsorb mutually and is combined into larger particles, and then precipitate from water, this step is to COD and NH
3the clearance of-N is 50%-60%.
First alkalescence on the weak side was adjusted to by counter for the pH of liquid before carrying out step B coagulation, the effect of coagulation that can make like this improves 50%-80%, wherein the consumption of PAC is 50-100ppm, the consumption of PAM is 5-20ppm, also the coagulant aidss such as calcium carbonate can be added in coagulation process, this coagulant aids is calcium carbonate, well can also reduce the colourity of waste water after the pH value of liquid.Table is the water-quality guideline of the gas production waste water after step B:
Table 2
| Project | CODcr(mg/L) | Cl-(mg/L) | pH | NH 3-N(mg/L) | Colourity |
| Bubble draining | 3984 | 3525 | 8.31 | 49.1 | 32 |
C, stripping;
Step C stripping utilizes foam separation or pneumatically supported method, gets rid of the gas of the tensio-active agent in gas production waste water water, small-molecule substance and irritant smell, by reducing the NH in water after stripping process
3-N, and remove smell, this step is to NH
3the clearance of-N is about 50%.
D, reduction vaporization.
The negative pressure value of step D reduction vaporization is 0.01MPa.Also can arrange a mixing step before described step D, this mixing step is mixed with Yuan Shui by the gas production waste water after step C process.First discharge standard can be reached by the water quality after step D directly to discharge.
Following table is the contrast form of water-quality guideline before and after method of the present invention:
Table 3
| Project | CODcr(mg/L) | Cl-(mg/L) | pH | NH-N(mg/L) | Colourity | Smell | Ca 2++Mg 2+(mg/L) | TDS |
| Bubble draining before process | 35300 | 8357 | 6.95 | 467 | 32768 | Lighter diesel oil taste | 600+73 | 17028 |
| Draining is steeped after process | 79.4 | 96.7 | 6.68 | 11.2 | 2 | Odorlessness | —— | —— |
According to above-described embodiment, just the present invention can be realized well.What deserves to be explained is; under prerequisite based on said structure design, for solving same technical problem, even if some making on the invention are without substantial change or polishing; the essence of the technical scheme adopted is still the same with the present invention, therefore it also should in protection scope of the present invention.
Claims (9)
1. gas production waste water treatment process, is characterized in that, comprises the following steps:
A, advanced oxidation;
B, coagulation;
C, stripping;
D, reduction vaporization.
2. gas production waste water treatment process according to claim 1, is characterized in that, the advanced oxidation in steps A adopts Fenton oxidation method, and this Fenton oxidation method is by adding by hydrogen peroxide and FeSO in waste water
4the Fenton reagent of composition, utilizes Fenton reagent to produce active hydroxyl free radical in acid condition, accelerates the oxidation of organism and reducing substances.
3. gas production waste water treatment process according to claim 2, is characterized in that, also can add catalyzer when described steps A carries out Fenton oxidation method, and described catalyzer is Manganse Dioxide, gac or modification sulphonation titanium cyanines; The pH value of described steps A oxidising process is 3.5, FeSO in Fenton reagent
4with H
2o
2proportioning be 1:3, drop into the FeSO of 1g in often liter of gas production waste water
4with the H of 2ml
2o
2.
4. gas production waste water treatment process according to claim 1; it is characterized in that; the concrete grammar of described step B is: in waste water, add PAC and PAM, by PAC and PAM, suspended substance or colloidal particle in waste water is adsorbed mutually and is combined into particle, thus make its suspended substance or colloidal precipitation.
5. gas production waste water treatment process according to claim 4, is characterized in that, the pH of described step B coagulation process is weakly alkaline; The consumption of described PAC is the consumption of 50-100ppm, PAM is 5-20ppm.
6. gas production waste water treatment process according to claim 5, is characterized in that, can also add calcium carbonate in described coagulation process.
7. gas production waste water treatment process according to claim 1, it is characterized in that, the concrete operations of described step C stripping utilize foam separation or pneumatically supported method, gets rid of the gas of the tensio-active agent in waste water, small-molecule substance and irritant smell.
8. gas production waste water treatment process according to claim 1, is characterized in that, the negative pressure value of step D reduction vaporization is 0.01MPa.
9. gas production waste water treatment process according to claim 1, is characterized in that, after stripping process completes, again carries out reduction vaporization after being mixed by the waste water of acquisition with Yuan Shui.
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| CN201510171585.8A CN104773893A (en) | 2015-04-13 | 2015-04-13 | Gas production wastewater treatment process |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105366868A (en) * | 2015-12-14 | 2016-03-02 | 四川阳森石油技术有限公司 | Up-to-standard discharge treatment technology of drilling wastewater from oil and gas fields |
| CN107162265A (en) * | 2017-06-07 | 2017-09-15 | 成都诺德源环保科技有限公司 | A kind of method applied to the gas production Sewage advanced treatment standard discharge containing foam discharging agent |
| CN107935278A (en) * | 2016-10-12 | 2018-04-20 | 中国石油化工股份有限公司 | A kind of processing method of foam gas production waste water and a kind of foam gas production wastewater treatment equipment |
| CN109133461A (en) * | 2017-06-28 | 2019-01-04 | 中国石油化工股份有限公司 | The processing method of foam drainage gas recovery waste water |
| CN109133463A (en) * | 2017-06-28 | 2019-01-04 | 中国石油化工股份有限公司 | The processing method of foam drainage gas recovery waste water |
| CN109133462A (en) * | 2017-06-28 | 2019-01-04 | 中国石油化工股份有限公司 | The processing method of foam drainage gas recovery waste water |
| CN109422384A (en) * | 2017-08-28 | 2019-03-05 | 三菱化学水解决方案株式会社 | Method for treating water and water treatment facilities |
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| US20030132166A1 (en) * | 2002-01-15 | 2003-07-17 | Paul Rey | Method of treating mine drainage |
| CN102976509A (en) * | 2012-10-30 | 2013-03-20 | 中国石油化工股份有限公司 | Treating method for gas production waste liquid with high content of sulfur |
| CN103214124A (en) * | 2013-05-13 | 2013-07-24 | 达州军华油田工程服务有限公司 | Gas production wastewater desulfurization purification pretreatment technology |
| CN103896448A (en) * | 2012-12-26 | 2014-07-02 | 天津市庆安特种设备研发有限公司 | Novel process of rock debris wastewater treatment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030132166A1 (en) * | 2002-01-15 | 2003-07-17 | Paul Rey | Method of treating mine drainage |
| CN102976509A (en) * | 2012-10-30 | 2013-03-20 | 中国石油化工股份有限公司 | Treating method for gas production waste liquid with high content of sulfur |
| CN103896448A (en) * | 2012-12-26 | 2014-07-02 | 天津市庆安特种设备研发有限公司 | Novel process of rock debris wastewater treatment |
| CN103214124A (en) * | 2013-05-13 | 2013-07-24 | 达州军华油田工程服务有限公司 | Gas production wastewater desulfurization purification pretreatment technology |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105366868A (en) * | 2015-12-14 | 2016-03-02 | 四川阳森石油技术有限公司 | Up-to-standard discharge treatment technology of drilling wastewater from oil and gas fields |
| CN107935278A (en) * | 2016-10-12 | 2018-04-20 | 中国石油化工股份有限公司 | A kind of processing method of foam gas production waste water and a kind of foam gas production wastewater treatment equipment |
| CN107162265A (en) * | 2017-06-07 | 2017-09-15 | 成都诺德源环保科技有限公司 | A kind of method applied to the gas production Sewage advanced treatment standard discharge containing foam discharging agent |
| CN109133461A (en) * | 2017-06-28 | 2019-01-04 | 中国石油化工股份有限公司 | The processing method of foam drainage gas recovery waste water |
| CN109133463A (en) * | 2017-06-28 | 2019-01-04 | 中国石油化工股份有限公司 | The processing method of foam drainage gas recovery waste water |
| CN109133462A (en) * | 2017-06-28 | 2019-01-04 | 中国石油化工股份有限公司 | The processing method of foam drainage gas recovery waste water |
| CN109422384A (en) * | 2017-08-28 | 2019-03-05 | 三菱化学水解决方案株式会社 | Method for treating water and water treatment facilities |
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Effective date of registration: 20160622 Address after: 610000, No. 1, building 1, No. 712, 1700, Tianfu Avenue, north section, Tianfu Road, Chengdu, Sichuan. 7 Applicant after: Sichuan lung long Environmental Protection Technology Co., Ltd. Address before: 636180 Sichuan province Dazhou Xuanhan County seven Li Township ten villages one society Applicant before: Jun Hua Environmental Protection Technology Co., Ltd of Dazhou City |
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Application publication date: 20150715 |
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