CN106396066B - Water purifying agent for treatment process of polymer-containing sewage pipeline mixer in offshore oilfield and application of water purifying agent - Google Patents
Water purifying agent for treatment process of polymer-containing sewage pipeline mixer in offshore oilfield and application of water purifying agent Download PDFInfo
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- CN106396066B CN106396066B CN201610984890.3A CN201610984890A CN106396066B CN 106396066 B CN106396066 B CN 106396066B CN 201610984890 A CN201610984890 A CN 201610984890A CN 106396066 B CN106396066 B CN 106396066B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5263—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using natural chemical compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
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Abstract
The invention discloses a water purifying agent for a treatment process of a polymer-containing sewage pipeline mixer in an offshore oilfield and application thereof. The water purifying agent comprises the following components in percentage by weight: 15.0-20.0% of polymeric aluminum ferric silicate (PSAF), 10.0-15.0% of polymeric aluminum trichloride (PAC), 5.0-10.0% of poly dimethyl diallyl ammonium chloride (PDA, molecular weight 4X 10)5‑5×105g/mol), 0.5-1.0% of sodium carboxymethyl starch (CMS), and the balance of deionized water. The preparation method comprises the following steps: according to the weight percentage, firstly adding the polyaluminium chloride, the polyaluminium ferric sulfate and the sodium carboxymethyl starch into water, adding the polydimethyldiallylammonium chloride after the polyaluminium chloride, the polyaluminium ferric sulfate and the sodium carboxymethyl starch are completely dissolved, and uniformly stirring at the rotating speed of 100-150 r/min to obtain the composite material. The water purifying agent is characterized in that: the flocculating constituent is compact, the forming is fast, the settling velocity is fast, the water body adaptability is strong, the suspending and oil removing effect is good, the polymer-containing sewage with high suspended matter content in the oil field can be effectively treated, and the reaction speed is suitable for the reinforced coagulation treatment process of the pipeline mixer.
Description
Technical Field
The invention belongs to the technical field of oilfield sewage treatment, and particularly relates to a water purifying agent for a treatment process of a polymer-containing sewage pipeline mixer for an offshore oilfield, and a preparation method and application thereof.
Background
With the continuous development of the petroleum industry, the polymer flooding technology is used as a technology for improving the recovery ratio of crude oil, and plays an important role in ensuring the stable yield and yield increase of the crude oil and controlling water in China. Due to the requirement of high-efficiency development, the polymer flooding technology is gradually popularized and applied to offshore oil fields in China. However, at the same time, polymer flooding techniques also have many negative effects, and the treatment of polymer-containing wastewater is extremely difficult. Compare with conventional water-drive oil recovery sewage, contain and gather sewage and have three typical characteristics, at first, because the existence of residual polymer, the viscosity that contains and gather sewage is greater than conventional oil recovery sewage, contains in the polymer sewage slime, the micelle has stronger stability, has increased and has contained the settling time who gathers sewage. Secondly, because the adsorption capacity of the polymer is stronger, the amount of silt carried in the sewage is increased, the content of suspended matters in the water is higher, and the sludge output of the polymer-containing sewage is increased. Thirdly, the polymer containing the residual polymer in the polymer-containing sewage enables the sewage to form a stable emulsion system, the viscoelasticity of the polymer improves the strength of an oil-water interface membrane, and the difficulty of oil-water separation of the polymer-containing sewage is increased. Especially, in the face of an offshore oil production platform with limited space, the three characteristics more obviously show the treatment difficulty of polymer-containing sewage, and the traditional water treatment technology is difficult to treat the polymer-containing sewage of the offshore oil field to reach the standard.
The pipeline mixer has good effect on the aspects of adding various coagulants, coagulant aids and the like in a water treatment project, is ideal equipment for realizing instant mixing of various medicaments in a water treatment process, has the characteristics of quick and efficient mixing, simple structure, energy consumption saving, small volume and the like, and can generate three functions of shunting, cross mixing and reverse rotational flow when water flows through the pipeline mixer under the condition of no external power, so that the added medicaments are quickly and uniformly diffused into the whole water body to achieve the aim of instant mixing, the mixing efficiency is as high as 90-95%, the medicament consumption can be saved by about 20-30%, the water treatment effect can be effectively improved, and the pipeline mixer has the characteristic of energy saving. The pipeline mixer is used as a reinforced coagulation treatment process for changing hydraulic conditions in the field of water treatment, and is well applied to polymer-containing sewage treatment in offshore oil fields. However, the existence of the pipeline mixer increases the treatment requirement of the purifier for polymer-containing sewage in offshore oil fields, and the purifier is required to adapt to the special hydraulic conditions of the pipeline mixer, such as mixing strength, mixing time and the like, thereby providing higher technical requirements for the purifier. Aiming at the water quality characteristics of polymer-containing sewage in offshore oil fields and the process requirements of pipeline mixers, the invention screens and compounds the water purifying agent with strong adaptability, so that the content of suspended matters and oil in the polymer-containing sewage in the offshore oil fields can be rapidly reduced, and the aim of purifying water is fulfilled.
Disclosure of Invention
The invention aims to provide a water purifying agent for a treatment process of a polymer-containing sewage pipeline mixer in an offshore oilfield, and a preparation method and application thereof.
In order to solve the technical problems, the invention provides a water purifying agent for a treatment process of a polymer-containing sewage pipeline mixer in an offshore oilfield, which consists of polymeric aluminum ferric silicate (PSAF), polymeric aluminum trichloride (PAC), polymeric dimethyl diallyl ammonium chloride (PDA), sodium carboxymethyl starch (CMS) and deionized water, wherein the total content of effective components is not lower than 30%, and the weight percentages of the effective components are as follows:
the balance of deionized water, and the total weight of the deionized water is 100 percent.
The invention also provides a preparation method of the water purifying agent, which comprises the following steps:
sequentially adding deionized water, polymeric ferric aluminum silicate, polymeric aluminum trichloride and sodium carboxymethyl starch according to a proportion, adding polydimethyldiallylammonium chloride after complete dissolution, and uniformly stirring at a rotating speed of 100-.
The invention further provides the application of the water purifying agent in water purification treatment of a polymer-containing sewage pipeline mixer process in an offshore oilfield. In the application, the adding amount of the water purifying agent is 60-100mg/L, and is calculated by the volume of the polymer-containing sewage in the offshore oilfield.
The water purifying agent for the treatment process of the polymer-containing sewage pipeline mixer in the offshore oilfield provided by the invention has the following advantages:
the water purifying agent provided by the invention is used for solving the water purifying problem of a treatment process of a pipeline mixer for polymer-containing sewage in an offshore oil field, has good thermal stability, can effectively purify and treat the polymer-containing sewage in the offshore oil field within the temperature range of 50-80 ℃, is suitable for different reinforced coagulation hydraulic conditions of the pipeline mixer, has the advantages of fast floc formation, fast floating speed, compact floc, difficulty in scattering, strong water body adaptability, and obviously superior oil and suspended matter removing effect to similar products, and the addition of the coagulant aid carboxymethyl starch sodium obviously improves the compatibility of an inorganic polymer flocculant polyaluminum ferric silicate, polyaluminum chloride and an organic polymer coagulant, namely polydimethyldiallyl ammonium chloride, so that the optimal water purifying effect can be exerted under the hydraulic conditions of the pipeline mixer. The water purifying agent can effectively treat polymer-containing sewage with high content of suspended matters in offshore oil fields, and the reaction speed is suitable for the reinforced coagulation treatment process of a pipeline mixer.
Drawings
FIG. 1 is a graph showing the comparison of the removal rate of oil content of polymer-containing sewage of offshore oil fields by various water purifying agents under the same dosing condition;
FIG. 2 is a graph showing the comparison of the removal rate of suspended matters in polymer-containing sewage of offshore oil fields by various water purifying agents under the same chemical adding condition.
Detailed Description
Example 1
Preparation of the water purifying agent: and sequentially adding 54kg of deionized water, 20kg of polymeric aluminum ferric silicate, 15kg of polymeric aluminum trichloride and 1.0kg of sodium carboxymethyl starch, adding 10kg of polydimethyldiallyl ammonium chloride after complete dissolution, and uniformly stirring at the rotating speed of 100 plus one material of 150 rpm to obtain the water purifying agent YTJS-01 for the treatment process of the polymer-containing sewage pipeline mixer in the offshore oilfield.
Performance evaluation:
the experimental groups 1 and 2 respectively evaluate the performance of the water purifying agent aiming at two polymer-containing sewage, and each experimental group respectively carries out three groups of parallel experiments with the serial number of A, B, C. The results of the experiment are shown in Table 1.
TABLE 1 Experimental results of Water purifier YTJS-01 on treating polymer-containing sewage of certain offshore oilfield
Note: OIW is the oil content; TSS is the suspended matter content; COD is the chemical oxygen demand.
Example 2
Preparation of the water purifying agent: 60.75kg of deionized water, 18kg of polymeric aluminum ferric silicate, 13kg of polymeric aluminum trichloride and 0.75kg of sodium carboxymethyl starch are sequentially added, 7.5kg of polydimethyldiallyl ammonium chloride is added after complete dissolution, and the mixture is uniformly stirred at the rotating speed of 100-150 r/min to obtain the water purifying agent YTJS-02 for the treatment process of the polymer-containing sewage pipeline mixer in the offshore oilfield.
Performance evaluation:
the experimental groups 1 and 2 respectively evaluate the performance of the water purifying agent aiming at two polymer-containing sewage, and each experimental group respectively carries out three groups of parallel experiments with the serial number of A, B, C. The results of the experiment are shown in Table 2.
TABLE 2 Experimental results of Water purifier YTJS-02 for treating polymer-containing sewage of certain offshore oilfield
Example 3
Preparation of the water purifying agent: and adding 69.5kg of deionized water, 15kg of polymeric aluminum ferric silicate, 10kg of polymeric aluminum trichloride and 0.5kg of sodium carboxymethyl starch in sequence, adding 5kg of polydimethyldiallyl ammonium chloride after complete dissolution, and uniformly stirring at the rotating speed of 100-.
Performance evaluation:
the experimental groups 1 and 2 respectively evaluate the performance of the water purifying agent aiming at two polymer-containing sewage, and each experimental group respectively carries out three groups of parallel experiments with the serial number of A, B, C. The results of the experiment are shown in Table 3.
TABLE 3 Experimental results of Water purifier YTJS-03 on treating polymer-containing sewage in certain offshore oilfield
Example 4
A performance evaluation comparison experiment is carried out on the water purifying agent YTJS-01 prepared in example 1 by using polymer-containing sewage of a certain offshore oilfield, and when the chemical concentration is 60mg/L, the oil removing and suspended matter removing effects of various water purifying agents are compared. Wherein the removal rate of the oil content of the polymer-containing sewage of the offshore oil field by various water purifying agents (PAC, PSAF, PDA, YTJS-01) under the same dosing condition is shown in figure 1; under the same dosing condition, the removal rate of the polymer-containing sewage suspended matters in the offshore oil field by various water purifying agents (PAC, PSAF, PDA, YTJS-01) is compared with that in the figure 2.
Claims (4)
1. The water purifying agent for the treatment process of the polymer-containing sewage pipeline mixer in the offshore oilfield is characterized by comprising polymeric aluminum ferric silicate, polymeric aluminum trichloride, polymeric dimethyl diallyl ammonium chloride, sodium carboxymethyl starch and deionized water, wherein the weight percentage of each effective component is as follows:
the balance of deionized water, and the total weight of the deionized water is 100 percent;
wherein the molecular weight of the poly dimethyl diallyl ammonium chloride is 4 × 105-5×105g/mol。
2. A method for preparing the water purifying agent of claim 1, comprising the steps of:
sequentially adding deionized water, polymeric ferric aluminum silicate, polymeric aluminum trichloride and sodium carboxymethyl starch, adding polydimethyldiallylammonium chloride after complete dissolution, and uniformly stirring at the rotating speed of 100-.
3. The use of the water purifying agent of claim 1 in the purification of water from polymer-containing sewer line mixer treatment process in offshore oil fields.
4. The use of claim 3, wherein the amount of the water purifying agent added is 60-100mg/L based on the volume of the polymer-containing wastewater in the offshore oilfield.
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| CN107572638A (en) * | 2017-06-12 | 2018-01-12 | 盘锦金宇众和工程服务有限公司 | Polymer-containing sewage in oil field oxidizing flocculant preparation method |
| CN107840486A (en) * | 2017-11-22 | 2018-03-27 | 苏州赛比膜分离科技有限公司 | The method for separating film process sewage |
| CN115637967A (en) * | 2021-07-20 | 2023-01-24 | 中国石油天然气股份有限公司 | Treatment agent for oilfield produced liquid and application of treatment agent in oilfield development |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104071880A (en) * | 2014-06-27 | 2014-10-01 | 南昌格润环保科技有限公司 | Extensive wastewater treatment capture agent |
| CN104085970A (en) * | 2014-08-04 | 2014-10-08 | 克拉玛依市三达新技术开发有限责任公司 | Thick oil sewage treatment coagulating agent, and preparation method and application thereof |
| CN105217895A (en) * | 2015-10-30 | 2016-01-06 | 无锡市嘉邦电力管道厂 | Heavy crude sewage water treating method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104071880A (en) * | 2014-06-27 | 2014-10-01 | 南昌格润环保科技有限公司 | Extensive wastewater treatment capture agent |
| CN104085970A (en) * | 2014-08-04 | 2014-10-08 | 克拉玛依市三达新技术开发有限责任公司 | Thick oil sewage treatment coagulating agent, and preparation method and application thereof |
| CN105217895A (en) * | 2015-10-30 | 2016-01-06 | 无锡市嘉邦电力管道厂 | Heavy crude sewage water treating method |
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