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Coagulant for treating waste water containing oil

A coagulant and sewage technology, applied in flocculation/sedimentation water/sewage treatment, grease/oily substance/suspton removal device, liquid separation, etc., can solve the problem of poor bridging ability between particles and weak adsorption and neutralization ability , The use of multiple steps and equipment, etc., to achieve the effect of high flocculation particle density, high removal rate, and strong bridging ability between particles

Active Publication Date: 2006-12-13
XINJIANG DELAND
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Oil exploration and petrochemical fields often produce a large amount of oily sewage, which is a complex multiphase system containing suspended solids, colloids, dispersed oil, slick oil, emulsified oil and dissolved substances; at present, the existing Some coagulants used to treat the above-mentioned oily sewage include inorganic coagulant and organic coagulant; in the treatment of oily sewage, the use of inorganic coagulant alone has strong adsorption and neutralization ability, but the particle interstitial The characteristics of poor bridging ability; when organic coagulant is used alone, there is a strong bridging ability between particles, but the characteristics of weak adsorption and neutralization ability; therefore, using inorganic coagulant or organic coagulant alone to treat oily sewage has the characteristics of chemical The defects of large dosage and poor effect; although some people use inorganic coagulants and organic coagulants together, that is, in the process of oily sewage treatment, separate inorganic coagulants are added successively at two or more dosing points. Coagulants and organic coagulants are used to obtain the coagulation effect with strong adsorption neutralization ability and strong bridging ability between particles, but there are many defects in using steps and required equipment; and However, the above-mentioned various coagulants also have the disadvantage of poor applicability

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  • Coagulant for treating waste water containing oil

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preparation example Construction

[0018] The preparation example of activated silicic acid solution is as follows: Take 1 kg of SiO 2 Add 15% hydrochloric acid to the 5% sodium silicate aqueous solution while stirring and measure its pH value. When the pH value = 2.0±0.2, stop adding hydrochloric acid, and the resulting solution is the activated silicic acid solution ;

[0019] The organic polymer solution refers to a solution obtained by uniformly mixing a 0.1% cationic polyacrylamide aqueous solution and a polydiallyldimethylammonium chloride solution with a solid content of 40% in a weight ratio of 1:4; Both cationic polyacrylamide and polydiallyldimethylammonium chloride are organic coagulants, which have strong bridging ability between particles;

[0020] The preparation example of the organic polymer solution is as follows: Take 1 kg of 0.1% cationic polyacrylamide aqueous solution and 4 kg of polydiallyldimethylammonium chloride solution with a solid content of 40%, mix them together and stir. After homogen...

specific Embodiment

[0026] Example Unit in the table: kg

[0027]

[0028] The preparation method of the above embodiment is:

[0029] ①Mix the polyaluminum chloride aqueous solution, the polyferric sulfate aqueous solution and the activated silicic acid solution, and stir for 1 hour, and then stand for 6 hours before use;

[0030] ②Add the organic polymer solution to the mixed solution obtained in the previous step, and after stirring for 2 hours, the obtained mixed solution is a coagulant for treating oily sewage.

[0031] The coagulant used in the treatment of oily sewage obtained in the previous step is liquid; of course, it can also be dried into solid;

[0032] When the coagulant used to treat oily sewage of the present invention is used, its dosage is generally 10-100mg / L, and its use method is: the agent can be directly put into the oily sewage, or the coagulant Dosing after diluting with water, the dilution ratio is determined according to the actual situation on site.

[0033] The coagula...

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Abstract

The coagulant for treating waste water containing oil consists of polyaluminium chloride aqua, polyferric sulfate aqua, activating silicic acid solution, and organic polymer solution. The preparation process includes mixing polyaluminium chloride aqua, polyferric sulfate aqua and activating silicic acid solution via stirring for at least 1 hr and letting stand for at least 6 hr; and adding organic polymer solution to the mixture through stirring for at least 2 hr to obtain the required coagulant. The coagulant has inorganic coagulant with powerful adsorption and electric neutralization and inorganic coagulant with powerful grain bridging capacity compounded together, low consumption, simple usage and excellent adaptability.

Description

Technical field [0001] The invention relates to a medicament for sewage treatment, in particular to a coagulant for treating oily sewage. Background technique [0002] Petroleum exploration and petrochemical industries often produce a large amount of oily wastewater. This oily wastewater is a complex multiphase system containing suspended solids, colloids, dispersed oil, slick oil, emulsified oil, and dissolved substances. Some coagulants used to treat the above-mentioned oily sewage include inorganic coagulants and organic coagulants; when treating oily sewage, the use of inorganic coagulants alone has strong adsorption and neutralization ability, but the particles are separated The characteristics of poor bridging ability; when organic coagulant is used alone, there is a strong bridging ability between particles, but the ability to adsorb electricity is weak; therefore, there is a chemical agent when using inorganic coagulant or organic coagulant alone to treat oily sewage The ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52C02F1/40
Inventor 李迎来
Owner XINJIANG DELAND