CN1241848C - Oil extraction waste water treatment method and its special reaction equipment - Google Patents
Oil extraction waste water treatment method and its special reaction equipment Download PDFInfo
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- CN1241848C CN1241848C CN 01138973 CN01138973A CN1241848C CN 1241848 C CN1241848 C CN 1241848C CN 01138973 CN01138973 CN 01138973 CN 01138973 A CN01138973 A CN 01138973A CN 1241848 C CN1241848 C CN 1241848C
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Abstract
The present invention relates to water treating technology, particularly to an oil extraction waste water treatment method and a special reaction device thereof. The present invention has the steps of 1), oxidizing treatment: oil extraction waste water is bottom up filled into a reaction apparatus, ozone is led into the waste water, and the ozone concentration in the reaction apparatus reaches 5 to 20 mg/L; at the same time, ultrasonic waves are added, and the frequency of the ultrasonic waves is larger than 20kHz and smaller than or equal to 25kHz, and the sound intensity value of the ultrasonic waves is controlled between 0.5 to 1.0 I0; the oil extraction waste water is stirred evenly with the ozone to be fully contacted with the ozone; the oil extraction waste water is kept in the reaction apparatus for 8 to 20 minutes; 2) conventional coagulation treatment. The present invention has high separation efficiency of pollutant and strong biodegradability.
Description
Technical field
The present invention relates to water technology, specifically a kind of oil extraction waste water treatment method and special reaction device thereof.
Background technology
In the prior art, adopt physico-chemical process to handle oil extraction waste water, effluent quality can only satisfy underground re-injection requirement usually, is difficult to satisfy the industrial wastewater discharge standard.Overwhelming majority waste water carry out underground re-injection after conventional art breading, but wherein very major part be invalid re-injection for avoiding environmental pollution to take, its cost is very high, and the re-injection resource-constrained, the difficulty in treatment of oil extraction waste water is that pollutent is neither easily separated, is difficult for degraded again.The biodegradability of waste water is poor, generally the BOD/COD value is no more than 0.2, biochemical treatment difficulty (document 1:Tapan K.et al., Fate of Crude oil by theCombination of Photooxidation and Biodegradation[J], Environ.Sci.Technol., 2000,34 (8): 1500-1505; Document 2:Ermolenko, Z.M.et al, A microbacterialstrain isolated from the oil of the Ukhtinskoe oil field:identification anddegradative properties[J], Microbiology (Moscow), 1997,66 (5): 542-545).At present, take anaerobic biological treatment, though the BOD/COD value rises, biodegradability strengthens, because contaminant degradation speed is slow, the hydraulic detention time of anaerobic unit is long, has limited this technology popularization and has used.The key that addresses the above problem is the oxidation technology of the pollutent seeking to suit and improves the effective way of separated from contaminants efficient, the biodegradability energy of regulation and control thick-oil waste water.
Summary of the invention
For overcome above-mentioned pollutent not easily separated, be difficult for degraded and long defective of time, the purpose of this invention is to provide a kind of separated from contaminants efficient height, oil extraction waste water treatment method and special reaction device thereof that biodegradability is stronger.
To achieve these goals, technical scheme of the present invention is that its process method step is as follows:
1) oxide treatment: oil extraction waste water is added in the reaction unit from bottom to top, feed ozone, make that ozone concn reaches 5～20mg/L in the reaction unit; Meanwhile, add ultrasonic wave, its frequency is greater than 20kHz, smaller or equal to 25kHz, and sound intensity value is controlled at 0.5～1.0I
0Between; Oil extraction waste water and ozone are stirred, it is fully contacted; Oil extraction waste water residence time in reaction unit is 8～20 minutes;
2) conventional coagulating treatment;
In step 2) after can add routine biochemistry treatment step 3);
The special reaction device of described oil extraction waste water treatment method mainly is made up of water distributor, ozone air distribution head, ultrasound probe, agitator, resorber, temperature sensor, reactant and condensing works, wherein reactant is the columnar structure of strap clamp layer, its interlayer is a condensing chamber, is located at temperature sensor in the condensing chamber, that link to each other with controller and is electrically connected with control valve in the condensing works; One agitator is installed in the reactant from top, the ultrasound probe that the ozone air distribution head that is connected with the ozonizer line and ultrasonic generator line connect is installed in the reactant, in the agitator below, water distributor is positioned at the reactant bottom, link to each other with the sump pump pipeline, the rising pipe of a belt switch is set on the reactant;
On the pipeline between sump pump and the water distributor, be provided with trip switch; Described condensing works is by pipeline and the placed in-line structure of condensing chamber by water pump; One control valve is located between condensing chamber bottom and the pump chamber.
Characteristics of the present invention are:
1. the invention belongs to the physical chemistry treatment process, utilized ozone-ultransonic synergy, difficult for biological degradation pollutent in the oxidation oil extraction waste water, can make the macromolecular substance in the oil extraction waste water be decomposed into the less material of molecular weight, become the compound of relatively easy degraded, thereby the BOD/COD value of oil extraction waste water rises, and compares biodegradability with physico-chemical process processing oil extraction waste water in the prior art and is improved.
2. the inventive method has utilized ozone-ultransonic synergy to handle the emulsification oil extraction waste water, it is carried out breakdown of emulsion handle, and has improved the coherency of pollutent, helps follow-up coagulating treatment.
3. adopt special reaction device of the present invention with ultrasonic rationally integrated with ozone technology, its comprehensive cost is lower, compares with anaerobic biological treatment of the prior art, and processing efficiency of the present invention obviously improves, and hydraulic detention time shortened to about 10-20 minute by several days.
Description of drawings
Fig. 1 is a special reaction device structural representation of the present invention.
Embodiment
Below in conjunction with drawings and Examples in detail the present invention is described in detail.
Embodiment 1
Certain oil production waste water in oil field contains COD221mg/L after oil removal, coagulating treatment, BOD38mg/L, mineral oil 31mg/L.
The present embodiment treatment step is as follows:
(1) oxide treatment: oil extraction waste water is added in the reaction unit from bottom to top, feed ozone, make that ozone concn reaches 9.55mg/L in the reaction unit; Add ultrasonic wave simultaneously, its frequency is 21kHz, and sound intensity value is 0.6I
0Oil extraction waste water and ozone are stirred, it is fully contacted; Oil extraction waste water residence time in reaction unit is 10 minutes;
(2) carry out conventional coagulating treatment then: add polymerize aluminum chloride, reach 60mg/L to reaction density, add polyacrylamide again, make concentration reach 2mg/L.
As shown in Figure 1, its special reaction device mainly is made up of water distributor 1, ozone air distribution head 2, ultrasound probe 3, agitator 5, resorber 6, temperature sensor 8, reactant 11 and condensing works, wherein reactant 11 is the columnar structure of strap clamp layer, its interlayer is a condensing chamber 7, is located at temperature sensor 8 in the condensing chamber 7, that link to each other with controller and is electrically connected with control valve 13 in the condensing works; One agitator 5 is installed in 11 li of reactant from top, the ultrasound probe 3 that the ozone air distribution head 2 that is connected with the ozonizer line and ultrasonic generator line connect is installed in 11 li of reactant, in agitator 5 belows, to going up layout down, water distributor 1 is circular, between described ozone air distribution head 2 and reactant 11 bottoms, link to each other with sump pump 12 pipelines, the rising pipe of 1 belt switch 9 is set on the reactant 11;
On the pipeline between sump pump 12 and the water distributor 1, be provided with trip switch 4; Described condensing works be by water pump 10 by pipeline and condensing chamber 7 placed in-line structures, between condensing chamber 7 bottoms and pump chamber, establish a control valve 13.
Reaction unit of the present invention: outer diameter D=40cm, inner diameter d=30cm, height h=50cm;
Operating process is as follows: waste water enters reactant 11 by water inlet pipe 4 through water distributor 1, and water distributor 1 top is an ozone air distribution head 2, after the aqueous vapor contact, under the ultrasonic wave effect, ozone-supersonic synergetic effect takes place, the quick stirring of agitator 5, what help reacting steadily carries out, and waste water is discharged after treatment; Reaction end gas enters resorber 6, removes CO
2And still contain residual ozone behind other acid gas, enter the ozone supplied system.Because condensing chamber 7 mounting temperature sensors 8 if temperature of reaction system surpasses 40 ℃, start refrigerating unit automatically, and reaction system is cooled off.
The inventive method and special reaction device result such as table 1.
The wastewater treatment result of table 1 embodiment 1
| The pollutent index | BOD | COD | Mineral oil |
| Step (1) concentration (mg/L) | 45.1 | 126.5 | 24.7 |
| Step (2) concentration (mg/L) | 27.3 | 81.4 | 8.1 |
The principle of the invention is: according to the structure and the character of principal pollutant in the oil extraction waste water, under ozone one supersonic synergetic effect, the oxidation of ozone not only makes in the waste water organic pollutant obtain cutting down, and the biodegradability of waste water is improved.Ultrasound-ozone coordination technique of the present invention has multiple action to conversion, degraded and the breakdown of emulsion etc. of pollutent, and is significant to the regulation and control of oil extraction waste water biodegradability, is the effective means that solves a thick-oil waste water biochemical treatment difficult problem.Adopt present method and reaction unit to handle oil extraction waste water, compare, increased BOD, COD concentration multiple ratio with conventional oil removal, coagulating treatment.The cohesion performance of pollutent improves, and synergistic result is far superior to the use of monotechnics, and processing costs reduces.
Embodiment 2
Difference from Example 1 is:
Certain oil production waste water in oil field contains COD409mg/L after oil removal, coagulating treatment, BOD47mg/L, mineral oil 49mg/L.
Operate as follows:
(1) oxide treatment: oil extraction waste water is added in the reaction unit from bottom to top, feed ozone, make that ozone concn reaches 12.96mg/L in the reaction unit; Add ultrasonic wave simultaneously, its frequency is 21kHz, and sound intensity value is 0.7I
0Oil extraction waste water and ozone are stirred, it is fully contacted; Oil extraction waste water residence time in reaction unit is 12 minutes;
(2) carry out conventional coagulating treatment then: with embodiment 1;
(3) routine biochemistry is handled: adopt activated sludge process to carry out aerobic biochemical and handle, hydraulic detention time is 6 hours.
Wastewater treatment the results are shown in Table 2.
The wastewater treatment result of table 2 embodiment 2
| The pollutent index | BOD | COD | Mineral oil |
| Step (1) concentration (mg/L) | 73.8 | 589.3 | 47.1 |
| Step (2) concentration (mg/L) | 94.3 | 370.3 | 16.8 |
| Step (3) concentration (mg/L) | 21.1 | 95.2 | 8.7 |
Claims (6)
1. oil extraction waste water treatment method is characterized in that step is as follows:
1) oxide treatment: oil extraction waste water is added in the reaction unit from bottom to top, feed ozone, make that ozone concn reaches 5～20mg/L in the reaction unit; Meanwhile, add ultrasonic wave, its frequency is greater than 20kHz, smaller or equal to 25kHz, and sound intensity value is controlled at 0.5～1.0 I
0Between; Oil extraction waste water and ozone are stirred, it is fully contacted; Oil extraction waste water residence time in reaction unit is 8～20 minutes;
2) add polymerize aluminum chloride, add polyacrylamide again and carry out coagulating treatment.
2. it is characterized in that in accordance with the method for claim 1: in step 2) after add adopt activated sludge process to carry out aerobic biochemical treatment step 3).
3. special reaction device according to the described oil extraction waste water treatment method of claim 1, it is characterized in that: mainly form by water distributor (1), ozone air distribution head (2), ultrasound probe (3), agitator (5), resorber (6), temperature sensor (8), reactant (11) and condensing works, wherein reactant (11) is the columnar structure of strap clamp layer, its interlayer is condensing chamber (7), is located at temperature sensor in the condensing chamber (7), that link to each other with controller (8) and is electrically connected with control valve (13) in the condensing works; One agitator (5) is installed in reactant (11) lining from top, ozone air distribution head (2) that is connected with ozonizer and the ultrasound probe (3) that is connected with ultrasonic generator be installed in reactant (11) lining, below agitator (5), water distributor (1) is positioned at reactant (11) bottom, link to each other with sump pump (12) pipeline, the rising pipe of one belt switch (9) is set on the reactant (11), and resorber (6) links to each other with reactant (11) by exhaust emission tube.
4. according to the described special reaction device of claim 3, it is characterized in that: on the pipeline between sump pump (12) and the water distributor (1), be provided with trip switch (4).
5. according to the described special reaction device of claim 3, it is characterized in that: described condensing works is by pipeline and the placed in-line structure of condensing chamber (7) by water pump (10).
6. according to the described special reaction device of claim 5, it is characterized in that: a control valve (13) is located between condensing chamber (7) bottom and the water pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01138973 CN1241848C (en) | 2001-12-30 | 2001-12-30 | Oil extraction waste water treatment method and its special reaction equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01138973 CN1241848C (en) | 2001-12-30 | 2001-12-30 | Oil extraction waste water treatment method and its special reaction equipment |
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| Publication Number | Publication Date |
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| CN1429781A CN1429781A (en) | 2003-07-16 |
| CN1241848C true CN1241848C (en) | 2006-02-15 |
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| CN 01138973 Expired - Fee Related CN1241848C (en) | 2001-12-30 | 2001-12-30 | Oil extraction waste water treatment method and its special reaction equipment |
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Families Citing this family (13)
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| US7048863B2 (en) * | 2003-07-08 | 2006-05-23 | Ashland Licensing And Intellectual Property Llc | Device and process for treating cutting fluids using ultrasound |
| CN1308247C (en) * | 2004-11-08 | 2007-04-04 | 武汉大学 | Dye waste water treating method and apparatus |
| CN102070276B (en) * | 2009-11-03 | 2013-10-23 | 环保科技环境咨询有限公司 | Device and method for treating sewage wastewater by autocontrol acoustic method used for reducing sludge water content and improving bypass flow properties |
| CN102225820B (en) * | 2011-05-30 | 2012-11-21 | 安徽师范大学 | Cycle utilization method of engine ultrasonic cleaning agent / liquid |
| CN102642958B (en) * | 2012-04-23 | 2014-04-23 | 西安交通大学 | Ultrasonic demulsification device for rendering of scouring wastewater |
| CN103523856B (en) * | 2013-09-09 | 2015-06-24 | 河海大学常州校区 | Water mist discharge and ultrasound synergetic degradation wastewater treatment device and running method thereof |
| CN106745949A (en) * | 2015-11-25 | 2017-05-31 | 衡阳市锦轩化工有限公司 | A kind of ADC foaming agents wastewater treatment equipment |
| CN110526494A (en) * | 2019-08-07 | 2019-12-03 | 四川绿艺华福石化科技有限公司 | A kind of processing method of waste emulsified mixture |
| CN111138026A (en) * | 2019-12-13 | 2020-05-12 | 陕西速源节能科技有限公司 | Oil field wastewater treatment method based on environmental protection |
| CN111170559B (en) * | 2020-01-07 | 2022-02-18 | 无锡市远洲环保科技有限公司 | Integrated sewage treatment equipment |
| CN111533326B (en) * | 2020-07-09 | 2020-10-20 | 天津万峰环保科技有限公司 | Ozone catalytic reaction device |
| CN111926178B (en) * | 2020-08-11 | 2022-07-01 | 昆明理工大学 | Device and method for cracking organic matters in zinc sulfate solution |
| CN115367978A (en) * | 2022-09-14 | 2022-11-22 | 西安交通大学 | Method and device for degrading oily sludge through ultrasonic/microbubble ozonation |
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