1. The utility model provides an oil field output fluid is handled with high-efficient water clarifier which characterized in that: the method comprises the following steps:

step 1, uniformly mixing a dimethyl diallyl ammonium chloride aqueous solution, an acrylamide aqueous solution, a chain transfer agent, an initiator I, a complexing agent and distilled water, placing the mixed solution at 25-35 ℃, stirring and reacting for 0.1-0.3h, heating to 40-50 ℃, and continuing to react for 1-3h to obtain a reaction mixed solution, wherein the mass ratio of the dimethyl diallyl ammonium chloride to the acrylamide to the chain transfer agent is (1-4) to (4-8) to (1-5), the adding amount of the initiator I is 1-4% of the mass of the dimethyl diallyl ammonium chloride, the adding amount of the complexing agent is 0.5-0.8% of the mass of the dimethyl diallyl ammonium chloride, and the adding amount of the distilled water is 3-6 times of the mass of the dimethyl diallyl ammonium chloride;

and 2, continuously heating the reaction mixed solution prepared in the step 1 to 55-65 ℃, dropwise adding an initiator II aqueous solution into the reaction mixed solution, continuously reacting for 1-3h after dropwise adding, continuously heating to 70-80 ℃, and continuously reacting for 4-6h to obtain a product A, wherein the adding amount of the initiator II is 1-3% of the mass of the dimethyldiallylammonium chloride, and the mass ratio of the initiator II to the distilled water is 1: (8-22);

and 3, mixing a zinc chloride aqueous solution with the product A prepared in the step 2, and uniformly stirring at the room temperature of 20-25 ℃ to obtain the high-efficiency water purifier for treating the oil field output liquid, wherein the mass ratio of the zinc chloride to the product A is (45-65) to (35-55).

2. The high-efficiency water clarifier for oilfield produced fluid treatment according to claim 1, characterized in that: in the step 1, the mass concentration of the aqueous solution of the dimethyldiallylammonium chloride is 60%, the mass concentration of the aqueous solution of the acrylamide is 40%, the mass concentration of the chain transfer agent is propylene glycol, the mass ratio of the first initiator is ammonium persulfate, the complexing agent is disodium ethylene diamine tetraacetate, the mass ratio of the dimethyldiallylammonium chloride, the acrylamide and the chain transfer agent is (1-3) to (5-7) to (2-4), the adding amount of the first initiator is 2-3% of the mass of the dimethyldiallylammonium chloride, the adding amount of the complexing agent is 0.6-0.7% of the mass of the dimethyldiallylammonium chloride, and the adding amount of the distilled water is 4-5 times of the mass of the dimethyldiallylammonium chloride.

3. The high-efficiency water clarifier for oilfield produced fluid treatment according to claim 1, characterized in that: in the step 2, ammonium persulfate is adopted as the second initiator, the addition amount of the second initiator is 1-2% of the mass of the dimethyldiallylammonium chloride, and the mass ratio of the second initiator to the distilled water is 1: (10-20).

4. The high-efficiency water clarifier for oilfield produced fluid treatment according to claim 1, characterized in that: in the step 3, the mass concentration of the zinc chloride aqueous solution is 30 percent, and the mass ratio of the zinc chloride to the product A is (50-60) to (40-50).

5. A preparation method of a high-efficiency water clarifier for treating oil field produced fluid is characterized by comprising the following steps: the method comprises the following steps:

step 1, uniformly mixing a dimethyl diallyl ammonium chloride aqueous solution, an acrylamide aqueous solution, a chain transfer agent, an initiator I, a complexing agent and distilled water, placing the mixed solution at 25-35 ℃, stirring and reacting for 0.1-0.3h, heating to 40-50 ℃, and continuing to react for 1-3h to obtain a reaction mixed solution, wherein the mass ratio of the dimethyl diallyl ammonium chloride to the acrylamide to the chain transfer agent is (1-4) to (4-8) to (1-5), the adding amount of the initiator I is 1-4% of the mass of the dimethyl diallyl ammonium chloride, the adding amount of the complexing agent is 0.5-0.8% of the mass of the dimethyl diallyl ammonium chloride, and the adding amount of the distilled water is 3-6 times of the mass of the dimethyl diallyl ammonium chloride;

and 2, continuously heating the reaction mixed solution prepared in the step 1 to 55-65 ℃, dropwise adding an initiator II aqueous solution into the reaction mixed solution, continuously reacting for 1-3h after dropwise adding, continuously heating to 70-80 ℃, and continuously reacting for 4-6h to obtain a product A, wherein the adding amount of the initiator II is 1-3% of the mass of the dimethyldiallylammonium chloride, and the mass ratio of the initiator II to the distilled water is 1: (8-22);

and 3, mixing a zinc chloride aqueous solution with the product A prepared in the step 2, and uniformly stirring at the room temperature of 20-25 ℃ to obtain the high-efficiency water purifier for treating the oil field output liquid, wherein the mass ratio of the zinc chloride to the product A is (45-65) to (35-55).

6. The preparation method of the high-efficiency water clarifier for the treatment of the oilfield produced fluid according to claim 5, characterized in that: in the step 1, the mass concentration of the aqueous solution of the dimethyldiallylammonium chloride is 60%, the mass concentration of the aqueous solution of the acrylamide is 40%, the mass concentration of the chain transfer agent is propylene glycol, the mass ratio of the first initiator is ammonium persulfate, the complexing agent is disodium ethylene diamine tetraacetate, the mass ratio of the dimethyldiallylammonium chloride, the acrylamide and the chain transfer agent is (1-3) to (5-7) to (2-4), the adding amount of the first initiator is 2-3% of the mass of the dimethyldiallylammonium chloride, the adding amount of the complexing agent is 0.6-0.7% of the mass of the dimethyldiallylammonium chloride, and the adding amount of the distilled water is 4-5 times of the mass of the dimethyldiallylammonium chloride.

7. The preparation method of the high-efficiency water clarifier for the treatment of the oilfield produced fluid according to claim 5, characterized in that: in the step 2, ammonium persulfate is adopted as the second initiator, the addition amount of the second initiator is 1-2% of the mass of the dimethyldiallylammonium chloride, and the mass ratio of the second initiator to the distilled water is 1: (10-20).

8. The preparation method of the high-efficiency water clarifier for the treatment of the oilfield produced fluid according to claim 5, characterized in that: in the step 3, the mass concentration of the zinc chloride aqueous solution is 30 percent, and the mass ratio of the zinc chloride to the product A is (50-60) to (40-50).

9. The use of the high efficiency water scavenger for treating oil field produced fluid according to any one of claims 1 to 4 in the treatment of oil field oily sewage.

10. Use according to claim 9, characterized in that: when the oil field oily sewage with the oil content of 1550-7300mg/L is treated, the oil removal rate of the high-efficiency water purifier for treating the oil field produced fluid is 93.81-99.62%.

Background

In recent years, as the water content of produced liquid rapidly rises in the middle and later stages of oil field exploitation, the comprehensive water content exceeds 70%, and the emulsion type of the produced liquid is also changed remarkably, wherein the emulsion type is changed from water-in-oil (W/O) at the initial stage of oil field development into oil-in-water (O/W) and water-in-oil-in-water (W/O/W) multiple emulsions. Meanwhile, the liquid yield of the oil field is further improved along with the increase of production measures such as large pump extract, thermal recovery, acidification and polymer flooding. The reduction of the treatment temperature of the process, the overload operation of treatment equipment and the rapid reduction of the treatment capacity are accompanied, so that the difficulty of oil-water treatment is greatly increased, and the requirements of high-efficiency rapid treatment, energy conservation and environmental protection form a pair of contradictions to be solved urgently in the current oil-gas-water treatment. In order to ensure the normal operation of oil field production, improve the oil-water treatment effect and ensure that the oil-water is qualified after reaching the standard.

The copolymer of dimethyl diallyl ammonium chloride and acrylamide is a linear water-soluble polymer with cationic groups, has high density of positive charges carried by a macromolecular chain, good water solubility, strong flocculation capacity, small using amount in sewage treatment, no toxicity, no environmental pollution, stable cationic unit structure and wide pH application range, and is widely applied to the fields of oil exploitation, paper making, mining, textile printing and dyeing, daily chemical industry and water treatment.

Cationic monomer dimethyl diallyl ammonium chloride (DMDAAC) and nonionic monomer Acrylamide (AM) are subjected to free radical polymerization reaction under the action of an initiator to obtain a copolymer Product (PDA), wherein the molecular structural formula of the copolymer product is as follows:

the copolymer Product (PDA) is a product obtained by free radical polymerization of dimethyl diallyl ammonium chloride (DMDAAC) and Acrylamide (AM) monomers, the degree of polymerization reaction progress is high, namely the relative molecular mass of the product is influenced by the conditions of an initiator system, the amount of the initiator system, monomer concentration, reaction temperature, time control and the like, even if the conditions are accurately controlled, the relative molecular mass of the polymerization product is difficult to control in the industrial production process, the molecular weight and viscosity of the product obtained by polymerization are high and can reach millions, the high-molecular-weight and high-viscosity copolymer Product (PDA) has poor treatment effect on sewage, low oil removal rate, poor water purification effect and high polymer viscosity, is difficult to fill on site, and cannot meet the requirements of oil fields.

Disclosure of Invention

The invention overcomes the defects in the prior art, the copolymer Product (PDA) has higher molecular weight and viscosity, the high molecular weight and high viscosity copolymer Product (PDA) has poor sewage treatment effect, has the problems of lower oil removal rate, poor water purification effect and difficult field filling of polymer with large viscosity, and provides the high-efficiency water purifying agent for treating the produced liquid in the oil field and the preparation method thereof.

The purpose of the invention is realized by the following technical scheme.

An efficient water clarifier for treating oil field produced fluid and a preparation method thereof are carried out according to the following steps:

step 1, uniformly mixing a dimethyl diallyl ammonium chloride aqueous solution, an acrylamide aqueous solution, a chain transfer agent, an initiator I, a complexing agent and distilled water, placing the mixed solution at 25-35 ℃, stirring and reacting for 0.1-0.3h, heating to 40-50 ℃, and continuing to react for 1-3h to obtain a reaction mixed solution, wherein the mass ratio of the dimethyl diallyl ammonium chloride to the acrylamide to the chain transfer agent is (1-4) to (4-8) to (1-5), the adding amount of the initiator I is 1-4% of the mass of the dimethyl diallyl ammonium chloride, the adding amount of the complexing agent is 0.5-0.8% of the mass of the dimethyl diallyl ammonium chloride, and the adding amount of the distilled water is 3-6 times of the mass of the dimethyl diallyl ammonium chloride;

and 2, continuously heating the reaction mixed solution prepared in the step 1 to 55-65 ℃, dropwise adding an initiator II aqueous solution into the reaction mixed solution, continuously reacting for 1-3h after dropwise adding, continuously heating to 70-80 ℃, and continuously reacting for 4-6h to obtain a product A, wherein the adding amount of the initiator II is 1-3% of the mass of the dimethyldiallylammonium chloride, and the mass ratio of the initiator II to the distilled water is 1: (8-22);

and 3, mixing a zinc chloride aqueous solution with the product A prepared in the step 2, and uniformly stirring at the room temperature of 20-25 ℃ to obtain the high-efficiency water purifier for treating the oil field output liquid, wherein the mass ratio of the zinc chloride to the product A is (45-65) to (35-55).

In the step 1, the mass concentration of the aqueous solution of the dimethyldiallylammonium chloride is 60%, the mass concentration of the aqueous solution of the acrylamide is 40%, the mass concentration of the chain transfer agent is propylene glycol, the mass ratio of the first initiator is ammonium persulfate, the complexing agent is disodium ethylene diamine tetraacetate, the mass ratio of the dimethyldiallylammonium chloride, the acrylamide and the chain transfer agent is (1-3) to (5-7) to (2-4), the adding amount of the first initiator is 2-3% of the mass of the dimethyldiallylammonium chloride, the adding amount of the complexing agent is 0.6-0.7% of the mass of the dimethyldiallylammonium chloride, and the adding amount of the distilled water is 4-5 times of the mass of the dimethyldiallylammonium chloride.

In the step 2, ammonium persulfate is adopted as the second initiator, the addition amount of the second initiator is 1-2% of the mass of the dimethyldiallylammonium chloride, and the mass ratio of the second initiator to the distilled water is 1: (10-20).

In the step 3, the mass concentration of the zinc chloride aqueous solution is 30 percent, and the mass ratio of the zinc chloride to the product A is (50-60) to (40-50).

The invention has the beneficial effects that: the method has simple process and easy operation, the addition of the chain transfer agent propylene glycol ensures that the reaction temperature is convenient to control, the polymerization reaction is stably carried out at low speed, and the method is suitable for the treatment of multiple emulsions in oil fields; the high-efficiency water cleaning agent for treating the oilfield produced fluid, which is prepared by the method, has the advantages of high oil removal rate, high monomer conversion rate, good water cleaning effect, low product viscosity, convenience in field injection and universal applicability.

Detailed Description

The technical solution of the present invention is further illustrated by the following specific examples.

In the examples, 60 wt% aqueous dimethyldiallylammonium chloride solution, 40 wt% aqueous acrylamide solution and 30 wt% aqueous zinc chloride solution were used.

Example 1

(1) Mixing 5.0g of 60 wt% dimethyl diallyl ammonium chloride aqueous solution, 25.0g of 40 wt% acrylamide aqueous solution, 10.0g of propylene glycol, 0.1g of ammonium persulfate, 0.03g of disodium ethylene diamine tetraacetate and 20.0g of distilled water, stirring and reacting at 25-35 ℃ for 0.1-0.3h, heating to 40-50 ℃, and continuing to react for 1-3 h;

(2) continuously heating to 55-65 ℃, dropwise adding a mixed solution of 0.05g of ammonium persulfate and 0.5g of distilled water into the reaction container, and continuously reacting for 1-3h after dropwise adding is finished;

(3) continuously heating to 70-80 ℃, and continuously reacting for 4-6h at the temperature to obtain a product A;

(4) 91.02g of zinc chloride aqueous solution with the concentration of 30 wt% is mixed with the prepared product A, and the mixture is stirred uniformly at room temperature (20-25 ℃) to obtain the high-efficiency water cleaning agent for treating the oil field output liquid.

Example 2

(1) Mixing 5.0g of 60 wt% dimethyl diallyl ammonium chloride aqueous solution, 30.0g of 40 wt% acrylamide aqueous solution, 15.0g of propylene glycol, 0.25g of ammonium persulfate, 0.065g of disodium ethylene diamine tetraacetate and 45.0g of distilled water, stirring and reacting at 25-35 ℃ for 0.1-0.3h, heating to 40-50 ℃, and continuing to react for 1-3 h;

(2) continuously heating to 55-65 ℃, dropwise adding a mixed solution of 0.15g of ammonium persulfate and 2.25g of distilled water into the reaction container, and continuously reacting for 1-3h after dropwise adding is finished;

(3) continuously heating to 70-80 ℃, and continuously reacting for 4-6h at the temperature to obtain a product A;

(4) 119.42g of zinc chloride aqueous solution with the concentration of 30 wt% is mixed with the prepared product A, and the mixture is stirred uniformly at room temperature (20-25 ℃) to obtain the high-efficiency water cleaning agent for treating the oil field output liquid.

Example 3

(1) Mixing 5.0g of 60 wt% dimethyl diallyl ammonium chloride aqueous solution, 35.0g of 40 wt% acrylamide aqueous solution, 20.0g of propylene glycol, 0.45g of ammonium persulfate, 0.105g of disodium ethylene diamine tetraacetate and 75.0g of distilled water, stirring and reacting at 25-35 ℃ for 0.1-0.3h, heating to 40-50 ℃, and continuing to react for 1-3 h;

(2) continuously heating to 55-65 ℃, dropwise adding a mixed solution of 0.3g of ammonium persulfate and 6.0g of distilled water into the reaction container, and continuously reacting for 1-3h after dropwise adding is finished;

(3) continuously heating to 70-80 ℃, and continuously reacting for 4-6h at the temperature to obtain a product A;

(4) 141.85g of zinc chloride aqueous solution with the concentration of 30 wt% is mixed with the prepared product A, and the mixture is stirred uniformly at room temperature (20-25 ℃) to obtain the high-efficiency water cleaning agent for treating the oil field output liquid.

Example 4

(1) Mixing 10.0g of 60 wt% dimethyl diallyl ammonium chloride aqueous solution, 25.0g of 40 wt% acrylamide aqueous solution, 10.0g of propylene glycol, 0.1g of ammonium persulfate, 0.03g of disodium ethylene diamine tetraacetate and 20.0g of distilled water, stirring and reacting at 25-35 ℃ for 0.1-0.3h, heating to 40-50 ℃, and continuing to react for 1-3 h;

(2) continuously heating to 55-65 ℃, dropwise adding a mixed solution of 0.05g of ammonium persulfate and 0.5g of distilled water into the reaction container, and continuously reacting for 1-3h after dropwise adding is finished;

(3) continuously heating to 70-80 ℃, and continuously reacting for 4-6h at the temperature to obtain a product A;

(4) 98.52g of zinc chloride aqueous solution with the concentration of 30 wt% is mixed with the prepared product A, and the mixture is stirred uniformly at room temperature (20-25 ℃) to obtain the high-efficiency water cleaning agent for treating the oil field output liquid.

Example 5

(1) Mixing 10.0g of 60 wt% dimethyl diallyl ammonium chloride aqueous solution, 30.0g of 40 wt% acrylamide aqueous solution, 15.0g of propylene glycol, 0.25g of ammonium persulfate, 0.065g of disodium ethylene diamine tetraacetate and 45.0g of distilled water, stirring and reacting at 25-35 ℃ for 0.1-0.3h, heating to 40-50 ℃, and continuing to react for 1-3 h;

(2) continuously heating to 55-65 ℃, dropwise adding a mixed solution of 0.15g of ammonium persulfate and 2.25g of distilled water into the reaction container, and continuously reacting for 1-3h after dropwise adding is finished;

(3) continuously heating to 70-80 ℃, and continuously reacting for 4-6h at the temperature to obtain a product A;

(4) 125.53g of zinc chloride aqueous solution with the concentration of 30 wt% is mixed with the prepared product A, and the mixture is stirred uniformly at room temperature (20-25 ℃) to obtain the high-efficiency water cleaning agent for treating the oil field output liquid.

Example 6

(1) Mixing 10.0g of 60 wt% dimethyl diallyl ammonium chloride aqueous solution, 35.0g of 40 wt% acrylamide aqueous solution, 20.0g of propylene glycol, 0.45g of ammonium persulfate, 0.105g of disodium ethylene diamine tetraacetate and 75.0g of distilled water, stirring and reacting at 25-35 ℃ for 0.1-0.3h, heating to 40-50 ℃, and continuing to react for 1-3 h;

(2) continuously heating to 55-65 ℃, dropwise adding a mixed solution of 0.3g of ammonium persulfate and 6.0g of distilled water into the reaction container, and continuously reacting for 1-3h after dropwise adding is finished;

(3) continuously heating to 70-80 ℃, and continuously reacting for 4-6h at the temperature to obtain a product A;

(4) 146.85g of zinc chloride aqueous solution with the concentration of 30 wt% is mixed with the prepared product A, and the mixture is stirred uniformly at room temperature (20-25 ℃) to obtain the high-efficiency water cleaning agent for treating the oil field output liquid.

Example 7

(1) Mixing 15.0g of 60 wt% dimethyl diallyl ammonium chloride aqueous solution, 25.0g of 40 wt% acrylamide aqueous solution, 10.0g of propylene glycol, 0.1g of ammonium persulfate, 0.03g of disodium ethylene diamine tetraacetate and 20.0g of distilled water, stirring and reacting at 25-35 ℃ for 0.1-0.3h, heating to 40-50 ℃, and continuing to react for 1-3 h;

(2) continuously heating to 55-65 ℃, dropwise adding a mixed solution of 0.05g of ammonium persulfate and 0.5g of distilled water into the reaction container, and continuously reacting for 1-3h after dropwise adding is finished;

(3) continuously heating to 70-80 ℃, and continuously reacting for 4-6h at the temperature to obtain a product A;

(4) 106.02g of 30 wt% zinc chloride aqueous solution is mixed with the prepared product A, and the mixture is uniformly stirred at room temperature (20-25 ℃) to obtain the high-efficiency water clarifier for treating the oil field output liquid.

Example 8

(1) Mixing 15.0g of 60 wt% dimethyl diallyl ammonium chloride aqueous solution, 30.0g of 40 wt% acrylamide aqueous solution, 15.0g of propylene glycol, 0.25g of ammonium persulfate, 0.065g of disodium ethylene diamine tetraacetate and 45.0g of distilled water, stirring and reacting at 25-35 ℃ for 0.1-0.3h, heating to 40-50 ℃, and continuing to react for 1-3 h;

(2) continuously heating to 55-65 ℃, dropwise adding a mixed solution of 0.15g of ammonium persulfate and 2.25g of distilled water into the reaction container, and continuously reacting for 1-3h after dropwise adding is finished;

(3) continuously heating to 70-80 ℃, and continuously reacting for 4-6h at the temperature to obtain a product A;

(4) 131.64g of zinc chloride aqueous solution with the concentration of 30 wt% is mixed with the prepared product A, and the mixture is stirred uniformly at room temperature (20-25 ℃) to obtain the high-efficiency water cleaning agent for treating the oil field output liquid.

Example 9

(1) Mixing 15.0g of 60 wt% dimethyl diallyl ammonium chloride aqueous solution, 35.0g of 40 wt% acrylamide aqueous solution, 20.0g of propylene glycol, 0.45g of ammonium persulfate, 0.105g of disodium ethylene diamine tetraacetate and 75.0g of distilled water, stirring and reacting at 25-35 ℃ for 0.1-0.3h, heating to 40-50 ℃, and continuing to react for 1-3 h;

(2) continuously heating to 55-65 ℃, dropwise adding a mixed solution of 0.3g of ammonium persulfate and 6.0g of distilled water into the reaction container, and continuously reacting for 1-3h after dropwise adding is finished;

(3) continuously heating to 70-80 ℃, and continuously reacting for 4-6h at the temperature to obtain a product A;

(4) 151.85g of zinc chloride aqueous solution with the concentration of 30 wt% is mixed with the prepared product A, and the mixture is stirred uniformly at room temperature (20-25 ℃) to obtain the high-efficiency water cleaning agent for treating the oil field output liquid.

Example 10

(1) Mixing 5.0g of 60 wt% dimethyl diallyl ammonium chloride aqueous solution, 30.0g of 40 wt% acrylamide aqueous solution, 15.0g of propylene glycol, 0.25g of ammonium persulfate, 0.065g of disodium ethylene diamine tetraacetate and 45.0g of distilled water, stirring and reacting at 25-35 ℃ for 0.1-0.3h, heating to 40-50 ℃, and continuing to react for 1-3 h;

(2) continuously heating to 55-65 ℃, dropwise adding a mixed solution of 0.15g of ammonium persulfate and 2.25g of distilled water into the reaction container, and continuously reacting for 1-3h after dropwise adding is finished;

(3) continuously heating to 70-80 ℃, and continuously reacting for 4-6h at the temperature to obtain a product A;

(4) 146.56g of 30 wt% zinc chloride aqueous solution is mixed with the prepared product A, and the mixture is uniformly stirred at room temperature (20-25 ℃) to obtain the high-efficiency water cleaning agent for treating the oil field output liquid.

Example 11

(1) Mixing 10.0g of 60 wt% dimethyl diallyl ammonium chloride aqueous solution, 35.0g of 40 wt% acrylamide aqueous solution, 20.0g of propylene glycol, 0.45g of ammonium persulfate, 0.105g of disodium ethylene diamine tetraacetate and 75.0g of distilled water, stirring and reacting at 25-35 ℃ for 0.1-0.3h, heating to 40-50 ℃, and continuing to react for 1-3 h;

(2) continuously heating to 55-65 ℃, dropwise adding a mixed solution of 0.3g of ammonium persulfate and 6.0g of distilled water into the reaction container, and continuously reacting for 1-3h after dropwise adding is finished;

(3) continuously heating to 70-80 ℃, and continuously reacting for 4-6h at the temperature to obtain a product A;

(4) 179.48g of zinc chloride aqueous solution with the concentration of 30 wt% is mixed with the prepared product A, and the mixture is stirred uniformly at room temperature (20-25 ℃) to obtain the high-efficiency water cleaning agent for treating the oil field output liquid.

Example 12

(1) Mixing 15.0g of 60 wt% dimethyl diallyl ammonium chloride aqueous solution, 25.0g of 40 wt% acrylamide aqueous solution, 10.0g of propylene glycol, 0.1g of ammonium persulfate, 0.03g of disodium ethylene diamine tetraacetate and 20.0g of distilled water, stirring and reacting at 25-35 ℃ for 0.1-0.3h, heating to 40-50 ℃, and continuing to react for 1-3 h;

(2) continuously heating to 55-65 ℃, dropwise adding a mixed solution of 0.05g of ammonium persulfate and 0.5g of distilled water into the reaction container, and continuously reacting for 1-3h after dropwise adding is finished;

(3) continuously heating to 70-80 ℃, and continuously reacting for 4-6h at the temperature to obtain a product A;

(4) and (3) mixing 70.68g of 30 wt% zinc chloride aqueous solution with the prepared product A, and uniformly stirring at room temperature (20-25 ℃) to obtain the high-efficiency water purifier for treating the oil field output liquid.

The first verification embodiment:

experiment raw materials: certain offshore oilfield wastewater (high oil content wastewater, oil content of wastewater 7300mg/L)

Experiment temperature: 62 deg.C

The concentration of the medicament: 65mg/L

Evaluation criteria: SY/T0530-2011 spectrophotometry for measuring oil content in oil field produced water

SY/T5797-93 & lt & ltmethod for evaluating demulsification usability of oil-in-water emulsion & gt

The evaluation method comprises the following steps: adding 65mg/L of water clarifier into 80mL of sewage at the high oily sewage temperature of 62 ℃, oscillating and uniformly mixing, observing an oil-water interface and water color, measuring the oil content of the lower-layer sewage after 10 minutes, and obtaining the test data shown in Table 1.

TABLE 1 high oil-contaminated water test data

Remarking: water color: a-, A, A + -Qing B-, B, B + -general C-, C, C + -Difference

Interface: a-, A, A + -full B-, B, B + -generally C-, C, C + -full

Oil droplet floating speed: slow, normal, fast and fast

Verification example two:

experiment raw materials: certain offshore oilfield wastewater (Medium oil-contaminated wastewater, oil-contaminated wastewater 3460mg/L)

Experiment temperature: 70 deg.C

The concentration of the medicament: 100mg/L

Evaluation criteria: SY/T0530-2011 spectrophotometry for measuring oil content in oil field produced water

SY/T5797-93 & lt & ltmethod for evaluating demulsification usability of oil-in-water emulsion & gt

The evaluation method comprises the following steps: at the temperature of 70 ℃ of high oil-containing sewage, 80mL of sewage is taken and added with 100mg/L of water clarifier, the mixture is uniformly oscillated and mixed, the oil-water interface and the water color are observed, the oil-containing value of the lower layer sewage is measured for 10 minutes, and the test data is shown in Table 2.

Oily wastewater test data in Table 2

Remarking: water color: a. the^-、A、A⁺-Qing B^-、B、B⁺General C^-、C、C⁺-difference

Interface: a. the^-、A、A⁺-is not substituted by B^-、B、B⁺General C^-、C、C⁺-irregularity

Oil droplet floating speed: slow, normal, fast and fast

Verification example three:

experiment raw materials: certain offshore oilfield wastewater (Medium oil-containing wastewater, sewage oil 1550mg/L)

Experiment temperature: 68 deg.C

The concentration of the medicament: 100mg/L

Evaluation criteria: SY/T0530-2011 spectrophotometry for measuring oil content in oil field produced water

SY/T5797-93 & lt & ltmethod for evaluating demulsification usability of oil-in-water emulsion & gt

The evaluation method comprises the following steps: at the high oily sewage temperature of 68 ℃, 80mL of sewage is taken and added with 100mg/L of water clarifier, the mixture is uniformly oscillated, the oil-water interface and the water color are observed, the oil content value of the lower layer sewage is measured for 10 minutes, and the test data is shown in Table 3.

Oily wastewater test data in Table 3

Remarking: water color: a. the^-、A、A⁺-Qing B^-、B、B⁺General C^-、C、C⁺-difference

Interface: a. the^-、A、A⁺-is not substituted by B^-、B、B⁺General C^-、C、C⁺-irregularity

Oil droplet floating speed: slow, normal, fast and fast

The invention has been described in an illustrative manner, and it is to be understood that any simple variations, modifications or other equivalent changes which can be made by one skilled in the art without departing from the spirit of the invention fall within the scope of the invention.