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Water clarifier mixed system for treating sewage containing polymer

A technology of clear water agent and clear water, applied in water/sludge/sewage treatment, flocculation/sedimentation water/sewage treatment, mining wastewater treatment, etc. To achieve efficient degreasing, reduce oil content, and ensure the effect of chemical degreasing

Active Publication Date: 2016-06-22
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The non-ionic water purifying agent has good compatibility with the anionic polymer in the produced water, and does not generate sludge. It mainly promotes the mutual aggregation of oil droplets by changing the properties of the oil-water interface, and it will also be removed during the oil removal process. Some small solid particles are often adsorbed on the surface of oil droplets in water, but there are problems such as large dosage, high oil content in sewage, and poor treatment effect

Method used

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  • Water clarifier mixed system for treating sewage containing polymer
  • Water clarifier mixed system for treating sewage containing polymer
  • Water clarifier mixed system for treating sewage containing polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1, preparation composite type clear water medicament

[0029] The copolymer (molecular weight is 10 4 ) mixed with 25 parts by mass of polyethylene polyamine grafted polyether, stirred and mixed evenly to obtain compound clear water medicament.

[0030] The polyethylene polyamine grafted polyether used is based on pentaethylene hexamine as the initiator and epoxy-terminated polyoxyethylene polyoxypropylene ether (Hangzhou Danwei Technology Co., Ltd., trade name BEPH) at 50 ° C. Prepared by epoxy ring-opening reaction.

Embodiment 2

[0031] Embodiment 2, preparation compound type clear water medicament

[0032] The copolymer of the dimethylamine-epichlorohydrin-ethylenediamine (molecular weight is 10 4 ) mixed with 20 parts by mass of polyetheramine grafted polyether, stirred and mixed evenly to obtain a compound clear water medicament.

[0033] The polyetheramine grafted polyether used is made of polyetheramine (Huntsman, T403) and epoxy-terminated polyoxyethylene polyoxypropylene ether (Hangzhou Danwei Technology Co., Ltd., trade name BEPH) at 50 ° C Prepared by epoxy ring-opening reaction.

Embodiment 3

[0034] Embodiment 3, preparation composite type clear water medicament

[0035] The copolymer (molecular weight is 10 4 ) mixed with 20 parts by mass of polyetheramine grafted polyether, stirred and mixed evenly to obtain a compound clear water medicament.

[0036] The polyetheramine grafted polyether used is made of polyetheramine (Huntsman, T403) and epoxy-terminated polyoxyethylene polyoxypropylene ether (Hangzhou Danwei Technology Co., Ltd., trade name BEPH) at 50 ° C Prepared by epoxy ring-opening reaction.

[0037] Adopt the compound type clear water medicament prepared by embodiment 1-3 to process the sewage containing poly, adopt bottle test method to evaluate the performance of compound type clear water medicament of the present invention:

[0038] The specific steps are:

[0039] 1. The water sample of polymer-containing sewage is provided by Bohai Oilfield. The concentration of polymer-containing sewage is 200mg / L, and the concentration of oil is 7000mg / L.

[00...

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Abstract

The invention a water clarifier mixed system for treating sewage containing polymer. A mixed water clarifier for treating the sewage containing polymer comprises a cationic type water clarifier and a non-ionic type water clarifier, wherein the cationic type water clarifier is at least one of glycerol-epichlorohydrin-triethylamine polymer, dimethylamine-epichlorohydrin-ethylenediamine polymer, polyaluminium chloride and poly-ferric sulfate; the non-ionic type water clarifier is polyether amine grafted polyether and / or polyethylene polyamine grafted polyether; the mass ratio of the cationic type water clarifier to the non-ionic type water clarifier is 1:10-1. The mixed water clarifier has the advantages that the mixed water clarifier can be used for fast and efficiently deoiling the sewage, the deoiling and solid removing efficiency of the water clarifier can be guaranteed, the mixed water clarifier is also applicable to the sewage with high oil content, and inverse demulsification can be achieved to reduce the oil content in floc; when the mixed water clarifier is used, inverse demulsification can be achieved to reduce the oil content in the floc during water clarifier flocculation and water clarifying, and the generated floc is non-sticky, and the like.

Description

technical field [0001] The invention relates to a compound system of water clearing agent for sewage treatment containing polymer, and belongs to the technical field of industrial water treatment. Background technique [0002] Oil production wastewater is mainly formation water brought out by crude oil from the formation, also known as production water or produced water. Produced water reinjection is the right way to rationally develop and utilize water resources and improve the utilization rate of water circulation. It is of great significance to maintain formation energy and improve the overall economic benefits of oilfield water injection development. Reinjection of oily sewage involves issues such as water quality purification and stability. At present, there are many kinds of chemicals used for oilfield sewage treatment, and the more common research directions include cationic water purifiers such as polyacrylamide modified and epichlorohydrin reactants; nonionic water...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/40C02F1/56C02F103/10
CPCC02F1/40C02F1/56C02F2103/10C02F2305/00
Inventor 张健王秀军翟磊靖波檀国荣
Owner CHINA NAT OFFSHORE OIL CORP
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