Thick oil sewage treatment coagulating agent, and preparation method and application thereof

A technology of heavy oil sewage and coagulant, applied in flocculation/sedimentation water/sewage treatment, separation method, grease/oily substance/float removal device, etc., can solve the problems of poor effect, weak effect, substandard water quality, etc. , to achieve the effect of simple preparation process, strong impact resistance and fast settling speed

Inactive Publication Date: 2014-10-08
KARAMAY SANDA NEW TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when these coagulants are used in the treatment of heavy oil high-temperature sewage in oil fields, although the flocculation speed is fast and the flocculation effect is good, the demulsification performance of emulsified oil and the purification performance of colloidal particles are poor, so they are not suitable for heavily emulsified heavy oil sewage. processing
[0004] At present, domestic oilfields have adopted a multi-functional cyclone reactor treatment process in sewage treatment, in which the purification and separation of oil removal, solid suspended matter and colloidal particles are mainly completed in the cyclone reactor, while the sewage is in the cyclo...

Method used

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  • Thick oil sewage treatment coagulating agent, and preparation method and application thereof
  • Thick oil sewage treatment coagulating agent, and preparation method and application thereof
  • Thick oil sewage treatment coagulating agent, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] First add 20wt% of polyaluminum chloride and 10wt% of polysilicon zinc sulfate into water, and then add 1.0wt% of polydimethyldiallylammonium chloride and 5.0wt% of 3.0G polyamide-amine after dissolution is complete , stir evenly, adjust the pH value to 3.0, and obtain a coagulant for heavy oil sewage treatment. This formula is suitable for the purification treatment of heavy oil high temperature sewage and has excellent effect. The heavy oil sewage treatment coagulant and polyaluminum sulfate were respectively added to the inlet of the cyclone reactor in the treatment process of a heavy oil sewage station in an oil field. The application effect of coagulant and polyaluminum sulfate for oily high-temperature sewage treatment is shown in Table 1 (Note: The dosage of the agent is calculated according to the effective content).

[0022] Table 1 Application effect of coagulant in heavy oil high temperature sewage treatment

[0023]

[0024]

[0025] As can be seen f...

Embodiment 2

[0027] First add 25wt% of polyaluminum chloride and 5wt% of polysilicon zinc sulfate into water, and then add 0.5wt% of polydimethyldiallyl ammonium chloride and 10.0wt% of 3.0G polyamide-amine after dissolution is complete , stir evenly, adjust the pH value to 5.0, and obtain a coagulant for heavy oil sewage treatment. This formula is suitable for the purification treatment of heavy oil high-temperature sewage, and the effect is stable. The heavy oil sewage treatment coagulant and polyaluminum sulfate were respectively added to the inlet of the cyclone reactor in the treatment process of a heavy oil sewage station in an oil field. Significantly decreased, the application effect of coagulant and polyaluminum sulfate for heavy oil high temperature sewage treatment is shown in Table 2 (Note: The dosage of the agent is calculated according to the effective content).

[0028] Table 2 Application effect of coagulant in heavy oil high temperature sewage treatment

[0029]

[00...

Embodiment 3

[0032]First add 15wt% of polyaluminum chloride and 8wt% of polysilicon zinc sulfate into water, and then add 0.7wt% of polydimethyldiallyl ammonium chloride and 8wt% of 3.0G polyamide-amine after dissolving completely, Stir evenly, adjust the pH value to 4.0, and obtain the coagulant for heavy oil sewage treatment. This formula is suitable for the purification treatment of heavy oil high-temperature sewage, and the effect is stable. The heavy oil sewage treatment coagulant and polyaluminum sulfate were respectively added to the inlet of the cyclone reactor in the treatment process of a heavy oil sewage station in an oil field. Significantly decreased, the application effect of coagulant for heavy oil high-temperature sewage treatment is shown in Table 3 (Note: The dosage of the agent is calculated according to the effective content).

[0033] Table 3 Application effect of coagulant in heavy oil high temperature sewage treatment

[0034]

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Abstract

The invention relates to an oilfield sewage treatment coagulating agent, particularly a thick oil sewage treatment coagulating agent. The thick oil sewage treatment coagulating agent comprises the following components in percentage by weight: 15.0-25.0% of polyaluminum chloride, 5.0-10.0% of polyzinc sulfate silicate, 0.5-1.0% of ammonium polydimethyldiallylchloride and 5.0-10.0% of 3.0G polyamide-amine. The preparation method comprises the following steps: adding the polyaluminum chloride and polyzinc sulfate silicate into water in percentage by weight, completely dissolving, adding the ammonium polydimethyldiallylchloride and 3.0G polyamide-amine, stirring uniformly, and regulating the pH value to 3.0-5.0 to obtain the thick oil sewage treatment coagulating agent. The thick oil sewage treatment coagulating agent has the advantages of low consumption and low price, and is suitable for a multifunctional swirl reactor treatment technique. The thick oil sewage treatment coagulating agent has the functions of reverse demulsification and water purification, and has favorable purifying effect on the thick oil high-temperature sewage. The preparation method is simple and easy to implement.

Description

technical field [0001] The invention relates to a coagulant for oilfield sewage treatment, in particular to a coagulant for heavy oil sewage treatment and its preparation method and application. Background technique [0002] Compared with other industrial wastewater, the components of heavy oil high-temperature wastewater in oilfield wastewater are very complex: they contain solid impurities, microorganisms, dissolved gases, and soluble salts, and there are generally miscellaneous organic substances and high salinity , high oil content, and high content of scaling ions. In short, the biggest feature of heavy oil high temperature sewage is "high oil content, high suspended matter, high silicon and high temperature", so there are many difficulties in the purification and treatment of heavy oil high temperature sewage, mainly as follows: (1) The temperature of the discharged sewage is high, reaching 80-90°C, while the traditional coagulant loses its effect at 80-90°C due to mo...

Claims

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Application Information

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IPC IPC(8): C02F1/52C02F1/56C02F1/40
Inventor 曾玉彬黄保军贾剑平董建新王益军王澄滨任定益李霞
Owner KARAMAY SANDA NEW TECH
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