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A kind of preparation method of inorganic particle flocculant for oil field

A technology of inorganic particles and flocculants, applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, water/sewage treatment, etc., can solve problems such as adverse effects of process and environment, large impact on site environment, and large amount of sludge , to achieve the effect of convenient preparation, low cost and small usage

Active Publication Date: 2016-07-06
E TECH ENERGY TECH DEV CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Because the organic polymer flocculants commonly used at present require a large amount of chemicals in the application, the amount of sludge produced is large, which is greatly affected by the on-site environment, and has certain adverse effects on the subsequent process and the environment.

Method used

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  • A kind of preparation method of inorganic particle flocculant for oil field
  • A kind of preparation method of inorganic particle flocculant for oil field
  • A kind of preparation method of inorganic particle flocculant for oil field

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Effect test

Embodiment 1

[0016] A method for preparing an inorganic particle flocculant for oil fields, which uses two components of ferric sulfate and aluminum chloride, and the molar ratio of ferric sulfate and aluminum chloride is 1:2-5; the preparation process is as follows: anhydrous ferric sulfate solid is used Ionized water is made into a solution with a mass fraction of 10%, and the resulting solution is dropped into boiling water according to the ratio of 15ml: 100ml boiling water. After boiling, cool to 40-60°C, and mechanically mix ferric sulfate and aluminum chloride. Stir at high speed Add aluminum chloride solution; then, add dilute sulfuric acid to adjust the pH value to 2, keep the temperature constant, and react for 50 minutes to obtain the inorganic particle flocculant of the present invention. The color of the inorganic particle flocculant solution for oil fields is yellow.

Embodiment 2

[0018] Preparation and application of an inorganic particle flocculant (oil production wastewater treatment agent) NPC-01 for oil fields:

[0019] Component distribution ratio (by molar volume): The molar ratio of ferric sulfate to aluminum chloride is 1:4.

[0020] Preparation method: mechanically mix according to the formula quantity to make it evenly, and the preparation process is the same as that in Example 1.

[0021] Experimental object: SZ36-1 crude oil treatment plant sewage system physicochemical section effluent

[0022] Experimental method: Measure 100mL of experimental sewage, preheat it in a water bath at the on-site temperature of 60°C for 15 minutes, then add NPC-01 of different concentrations, put it into the cradle and shake it evenly for 50 times, record the water quality and the state of suspended matter, see the results Table 1.

[0023] Table 1 Water purification effect of different concentrations of flocculant NPC-01

[0024]

[0025] It can be see...

Embodiment 3

[0027] Preparation and application of an inorganic particle flocculant (oil production wastewater treatment agent) NPC-02 for oil fields:

[0028] Component distribution ratio (by molar volume): The molar ratio of ferric sulfate to aluminum chloride is 1:5.

[0029] The preparation method, test object and test method of the oil production wastewater treatment agent NPC-02 are the same as those of Experiment 2, and the experimental results are shown in Table 2.

[0030] Table 2 Water purification effect of different concentrations of flocculant NPC-02

[0031]

[0032] It can be seen from Table 2 that increasing the content of aluminum chloride in the chemical composition will reduce the flocculation ability of the chemical at the same concentration. For the experimental water quality, the optimal concentration of the inorganic flocculant NPC-02 is 90ppm.

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Abstract

The invention relates to a method for preparing an inorganic granular flocculant used in the oil field and belongs to the technical field of oil recovery wastewater treatment. The method is characterized in that the inorganic granular flocculant is prepared by two ingredients, namely ferric sulfate and aluminium chloride, wherein the molar ratio of ferric sulfate to aluminium chloride is 1: (2-5). The preparation process comprises the following steps: enabling solid anhydrous ferric sulfate to be a solution with deionized water, adding the solution into boiling water, cooling to 40-60 DEG C after the mixture is boiled, and adding into an aluminium chloride solution while stirring; then adding dilute sulphuric acid to enable the pH value to be 1-3, keeping the temperature, and reacting for 45-60 min to obtain the inorganic granular flocculant. The method has the advantages of being simple in process, easily to obtain raw materials, simple in components, convenient to prepare high in speed and efficiency, low in cost, wide in application range, low in consumption and environmentally-friendly, and can efficiently remove and highly flocculate suspended matters and emulsified oil in oil recovery wastewater.

Description

technical field [0001] The invention belongs to the technical field of oil production wastewater treatment, and in particular relates to a preparation method of an inorganic particle flocculant for oil fields. Background technique [0002] At present, the oil field adopts the method of water injection development. As the development progresses, the water content of the crude oil produced will gradually increase. After the crude oil is dehydrated, a large amount of oily sewage will be generated to be treated, and the purified water after treatment will be injected back into the formation instead of groundwater. In the past, it has formed a good way to develop oil fields by using circulating water sources, which not only protects the environment but also obtains reliable water injection sources. However, oilfield sewage contains many suspended solids of mechanical impurities and residual oil droplets after oil-water separation. If this water enters directly The reinjection sys...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52C02F103/10
CPCC02F1/5236C02F2103/10
Inventor 康玉彬
Owner E TECH ENERGY TECH DEV CORP