CN109911998A - A kind of coagulant and its application method suitable for oil extraction waste water processing system - Google Patents
A kind of coagulant and its application method suitable for oil extraction waste water processing system Download PDFInfo
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- CN109911998A CN109911998A CN201910215225.1A CN201910215225A CN109911998A CN 109911998 A CN109911998 A CN 109911998A CN 201910215225 A CN201910215225 A CN 201910215225A CN 109911998 A CN109911998 A CN 109911998A
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- waste water
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- extraction waste
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Abstract
The present invention proposes a kind of coagulant suitable for oil extraction waste water processing system, including inorganic flocculating agent and flocculation aid, and the mass ratio of the inorganic flocculating agent and flocculation aid is 1-5:1；The inorganic flocculating agent is by mole the Polyaluminium iron silicon including 1%-1.7%, 10 ‰ -15 ‰ ferrous sulfate hydrate, 0.2 ‰ -0.3 ‰ aluminum sulfate, 0.2 ‰ -0.3 ‰ rare earth metal and the deionized water of surplus；The flocculation aid is polyacrylamide.The present invention also proposes the application method of the coagulant suitable for oil extraction waste water processing system, can effectively remove the pollutant in oil extraction waste water, reduces COD.
Description
Technical field
The present invention relates to a kind of coagulant and its application method suitable for oil extraction waste water processing system.
Background technique
In recent years, with being continually developed to marginal oil field, ocean deepwater oil field, the oil extraction waste water generated in recovery process
Containing oil slick, oil emulsion and dissolved oil, there are also other solid suspensions.And use current wastewater treatment method water outlet still difficult
To reach emission request, COD is exceeded especially serious.New challenge thus is proposed to the processing of oily wastewater, still needs to constantly visit
Rope and improvement.
Summary of the invention
Big, the exceeded serious problem of COD for the existing oil extraction waste water processing difficulty of solution, the present invention propose a kind of suitable for adopting
The coagulant and its application method of oily waste water treatment system effectively remove the pollutant in oil extraction waste water, reduce COD.
The present invention proposes a kind of coagulant suitable for oil extraction waste water processing system, including inorganic flocculating agent and flocculation aid,
The mass ratio of the inorganic flocculating agent and flocculation aid is 1-5:1；The inorganic flocculating agent is by mole including 1%-1.7%
Polyaluminium iron silicon, 10 ‰ -15 ‰ ferrous sulfate hydrate, 0.2 ‰ -0.3 ‰ aluminum sulfate, 0.2 ‰ -0.3 ‰ terres rares
The deionized water of metal and surplus；The flocculation aid is polyacrylamide.
Further, the molecular weight of the polyacrylamide is 2000, degree of hydrolysis 14%.
Further, the rare earth metal is one of lanthanum, praseodymium, cerium, neodymium, erbium or a variety of.
The present invention also proposes a kind of application method of above-mentioned coagulant suitable for oil extraction waste water processing system, including with
Lower step:
Step 1: by the Polyaluminium iron silicon of 1%-1.7%, 10 ‰ -15 ‰ ferrous sulfate hydrate, 0.2 ‰ -0.3 ‰
Aluminum sulfate and 0.2 ‰ -0.3 ‰ rare earth metal be added in deionized water stir evenly dissolution obtain inorganic flocculating agent
Mixture, the deionized water and the quality of Polyaluminium iron silicon, ferrous sulfate hydrate, aluminum sulfate and rare earth metal are than summation
100%；
Step 2: the mixture of the inorganic flocculating agent is added in oil extraction waste water, pH value is adjusted between 6-7,
Then the flocculation aid polyacrylamide, stirring flocculation are added.
It preferably, further include Step 3: repeating step 2 operation.
Preferably, use content of the inorganic flocculating agent in oil extraction waste water is 1200-1800ppm, the inorganic wadding
The mass ratio of solidifying agent and flocculation aid is 1-5:1.
Preferably, use content of the inorganic flocculating agent in the oil extraction waste water of step 2 is 1000ppm, in step 3
Oil extraction waste water in use content be 200-800ppm.
Preferably, pH value described in step 2 is between 6-6.3.
Beneficial effects of the present invention:
Coagulant proposed by the present invention suitable for oil extraction waste water processing system, by the inorganic flocculating agent of compounding with help it is solidifying
Agent is used cooperatively, and the mass ratio of the inorganic flocculating agent and flocculation aid is 1-5:1；The inorganic flocculating agent is by mole packet
Include the Polyaluminium iron silicon of 1%-1.7%, 10 ‰ -15 ‰ ferrous sulfate hydrate, 0.2 ‰ -0.3 ‰ aluminum sulfate, 0.2 ‰ -
0.3 ‰ rare earth metal, the flocculation aid can effectively remove oil recovery by single or multiple flocculations for polyacrylamide
Pollutant in waste water reduces COD COD.The front-end processing of coagulant of the invention as oil extraction waste water, subtracts significantly
The pressure of processing such as is further filtered in light rear end, reduces overall operation cost.
Specific embodiment
As follows in conjunction with specific embodiments, application scheme is further described:
Embodiment one:
A kind of coagulant suitable for oil extraction waste water processing system, including inorganic flocculating agent and flocculation aid, the inorganic wadding
The mass ratio of solidifying agent and flocculation aid is 1-5:1；The inorganic flocculating agent by mole the Polyaluminium iron silicon including 1.5%,
12 ‰ ferrous sulfate hydrate, 0.3 ‰ aluminum sulfate, 0.2 ‰ ‰ rare earth metal and the deionized water of surplus；Institute
Stating flocculation aid is polyacrylamide, and the molecular weight of the polyacrylamide is 2000, degree of hydrolysis 14%.The rare earth metal is
One of lanthanum, praseodymium, cerium, neodymium, erbium are a variety of.
A kind of application method of the above-mentioned coagulant suitable for oil extraction waste water processing system, comprising the following steps:
Step 1: Polyaluminium iron silicon, ferrous sulfate hydrate, aluminum sulfate and rare earth metal are added in deionized water
It stirs evenly dissolution and obtains the mixture of inorganic flocculating agent, the deionized water and Polyaluminium iron silicon, ferrous sulfate hydrate, sulfuric acid
The quality of aluminium and rare earth metal is 100% than summation；
Step 2: the mixture of the inorganic flocculating agent is added in oil extraction waste water, adjust pH value to 6-6.3 it
Between, then add the flocculation aid polyacrylamide, stirring flocculation.
It is flocculated again Step 3: repeating step 2 operation.
Use content of the inorganic flocculating agent in the oil extraction waste water of step 2 is 1000ppm, in the oil recovery of step 3
Use content in waste water is 200-800ppm.The mass ratio of the inorganic flocculating agent and flocculation aid is 1-5:1.
Specifically, being that 5:1 carries out going out after the operation of above-mentioned steps two is flocculated with the mass ratio of inorganic flocculating agent and flocculation aid
One emersion water of water, the inorganic flocculating agent of step 3 and the mass ratio of flocculation aid are implemented according to 1:1,2.5:1 and 4:1 respectively,
The treatment effect of oil extraction waste water is as follows:
Front-end processing of the coagulant as oil extraction waste water can be effectively removed and be adopted by single or multiple flocculations
Pollutant in oily waste water reduces COD COD and mitigates the pressure that the processing such as are further filtered in rear end significantly, reduces integrally
Operating cost.
It is that above-mentioned preferred embodiment should be regarded as application scheme embodiment for example, all with application scheme thunder
Same, approximate or technology deduction, replacement, improvement for making based on this etc., are regarded as the protection scope of this patent.
Claims (8)
1. a kind of coagulant suitable for oil extraction waste water processing system, which is characterized in that including inorganic flocculating agent and flocculation aid, institute
The mass ratio for stating inorganic flocculating agent and flocculation aid is 1-5:1；The inorganic flocculating agent is by mole including 1%-1.7%
Polyaluminium iron silicon, 10 ‰ -15 ‰ ferrous sulfate hydrate, 0.2 ‰ -0.3 ‰ aluminum sulfate, 0.2 ‰ -0.3 ‰ rare earth eka-gold
The deionized water of category and surplus；The flocculation aid is polyacrylamide.
2. the coagulant according to claim 1 suitable for oil extraction waste water processing system, which is characterized in that the polypropylene
The molecular weight of amide is 2000, degree of hydrolysis 14%.
3. the coagulant according to claim 1 suitable for oil extraction waste water processing system, which is characterized in that the terres rares
Metal is one of lanthanum, praseodymium, cerium, neodymium, erbium or a variety of.
4. the application method described in a kind of claim 1-3 suitable for the coagulant of oil extraction waste water processing system, feature exist
In, comprising the following steps:
Step 1: by the Polyaluminium iron silicon of 1%-1.7%, 10 ‰ -15 ‰ ferrous sulfate hydrate, 0.2 ‰ -0.3 ‰ sulfuric acid
Aluminium and 0.2 ‰ -0.3 ‰ rare earth metal be added to stirred evenly in deionized water dissolution obtain the mixing of inorganic flocculating agent
Object, the deionized water and the quality of Polyaluminium iron silicon, ferrous sulfate hydrate, aluminum sulfate and rare earth metal are than summation
100%；
Step 2: the mixture of the inorganic flocculating agent is added in oil extraction waste water, pH value is adjusted between 6-7, then
Add the flocculation aid polyacrylamide, stirring flocculation.
5. the application method of the coagulant according to claim 4 suitable for oil extraction waste water processing system, which is characterized in that
It further include Step 3: repeating step 2 operation.
6. the application method of the coagulant according to claim 4 suitable for oil extraction waste water processing system, which is characterized in that
Use content of the inorganic flocculating agent in oil extraction waste water is 1200-1800ppm, the matter of the inorganic flocculating agent and flocculation aid
Amount is than being 1-5:1.
7. the application method of the coagulant according to claim 5 suitable for oil extraction waste water processing system, which is characterized in that
Use content of the inorganic flocculating agent in the oil extraction waste water of step 2 is 1000ppm, in the oil extraction waste water of step 3
It the use of content is 200-800ppm.
8. according to the application method of the described in any item coagulant suitable for oil extraction waste water processing system of claim 4-7,
It is characterized in that, pH value described in step 2 is between 6-6.3.
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| CN201910215225.1A CN109911998A (en) | 2019-03-21 | 2019-03-21 | A kind of coagulant and its application method suitable for oil extraction waste water processing system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112978883A (en) * | 2019-12-17 | 2021-06-18 | 大唐环境产业集团股份有限公司 | Composite medicament for desulfurization wastewater treatment and preparation method thereof |
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| CN1350986A (en) * | 2000-10-26 | 2002-05-29 | 中国石油化工股份有限公司 | Process for treating recovered water in oil field |
| CN104649389A (en) * | 2013-11-22 | 2015-05-27 | 四川锦美环保科技有限公司 | Two-grade coagulating sedimentation treatment process of pickling waste water of pickled vegetable |
| CN106315795A (en) * | 2015-07-06 | 2017-01-11 | 迪建东 | Inorganic flocculating agent for coking waste water |
| CN107572639A (en) * | 2017-09-29 | 2018-01-12 | 中科海创环境科技（大连）有限公司 | A kind of coagulant suitable for coking wastewater processing system |
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2019
- 2019-03-21 CN CN201910215225.1A patent/CN109911998A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1350986A (en) * | 2000-10-26 | 2002-05-29 | 中国石油化工股份有限公司 | Process for treating recovered water in oil field |
| CN104649389A (en) * | 2013-11-22 | 2015-05-27 | 四川锦美环保科技有限公司 | Two-grade coagulating sedimentation treatment process of pickling waste water of pickled vegetable |
| CN106315795A (en) * | 2015-07-06 | 2017-01-11 | 迪建东 | Inorganic flocculating agent for coking waste water |
| CN107572639A (en) * | 2017-09-29 | 2018-01-12 | 中科海创环境科技（大连）有限公司 | A kind of coagulant suitable for coking wastewater processing system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112978883A (en) * | 2019-12-17 | 2021-06-18 | 大唐环境产业集团股份有限公司 | Composite medicament for desulfurization wastewater treatment and preparation method thereof |
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Application publication date: 20190621 |
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