Compound type flocculating agent and preparation method thereof

Abstract

The invention discloses a compound type flocculating agent and a preparation method thereof. The compound type flocculating agent is prepared from the following ingredients in parts by mass: 6 to 8 parts of cystamine propylene, 2 to 6 parts of alkali chloride, 6 to 8 parts of carbon sodium, 3 to 5 parts of ethylene dinitrilotetra-acetic acid, 4 to 8 parts of aluminum sulfate, 6 to 8 parts of carbon sodium, 4 to 8 parts of natural organic acid, 15 to 25 parts of coal ash, 14 to 16 parts of starch, 5 to 9 parts of kieselguhr, 3 to 5 parts of aluminum ammonium sulfate, 10 to 12 parts of adsorbent aid, and 4 to 6 parts of polyacrylamide. The compound type flocculating agent provided by the invention is applied in an offshore oilfield wastewater treatment system, solves the problem of difficulty in treating sewage caused by the output liquid change of an offshore oilfield, and overcomes the defects of large dosage, no obvious effects and large transportation volume existed in a current medicament. The quality of water injected or discharged into the sea reaches the standard, the preparation method of the compound type flocculating agent is simple, the production steps are reduced, and the production cost is reduced.

Description

technical field [0001] The invention relates to the field of marine environmental protection, in particular to a composite flocculant and a preparation method thereof. Background technique [0002] The status quo of offshore oilfield sewage treatment is firstly that the liquid production rate has increased significantly, and the residence time of the oil-water mixture in the treatment process has been shortened sharply; secondly, the composition of the produced liquid is complex. Due to the extensive use of production stimulation measures such as well workover, thermal recovery, and polymer injection in oilfields, a large amount of organic and inorganic substances with complex components are injected into the formation, and these substances return a large amount of sediment, which increases the degree of emulsification of the return fluid , which brought great difficulties to the later treatment; third, the on-site equipment is aging and the oil collection efficiency is redu...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a composite flocculant and a preparation method thereof. The invention is applied to the sewage treatment system of offshore oilfields, solves the problem that the sewage in offshore oilfields is difficult to treat due to changes in the output fluid, and overcomes the problems existing in the currently used agents. Disadvantages of large dosage, insignificant effect and large transportation volume