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Treatment method realizing polymer-bearing produced wastewater resource utilization

A treatment method and technology for water resources, applied in mining wastewater treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. effect, realizing the effect of resource utilization and saving water resources

Active Publication Date: 2010-11-24
SENUO TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the oilfield wastewater containing polymers has been treated in the early stage, due to the improper treatment methods, the water quality after the preliminary treatment cannot be used in conjunction with the "double membrane" technology, so the water quality after the final treatment is difficult to realize the utilization of sewage resources

Method used

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  • Treatment method realizing polymer-bearing produced wastewater resource utilization
  • Treatment method realizing polymer-bearing produced wastewater resource utilization
  • Treatment method realizing polymer-bearing produced wastewater resource utilization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Embodiment 1, combining figure 1 In the middle (part), the pretreatment stage adopts the treatment process of two-stage air flotation + double filter material filter + fine filter, and the chemicals added mainly include degreasing agent, coagulant, fungicide, lye, etc. The amount of dosing is based on the water intake of 120m 3 Calculation per hour, degreasing agent is added to the inlet of the first-stage air flotation. , such as: inorganic salt coagulant (aluminum sulfate), inorganic polymer salt (polyaluminum chloride), organic polymer coagulant (polyacrylamide), the dosage is 300-500mg / L, continuous dosage Add; Dosing lye (NaOH) at the inlet of the two-stage filter backwash pump, the commonly used volume concentration is 5%-10%, the dosage is 2.0-3.0mg / L, intermittent dosing, 1 time / month. Dosing fungicides at the inlet of the double filter material filter, commonly used fungicides include chlorine dioxide, quaternary ammonium salts, glutaraldehyde, halogenated ph...

Embodiment 2

[0013] Example 2, combined with figure 2 (All), on the basis of Example 1, the reuse of filter backwash water and ultrafiltration concentrated water is considered in the auxiliary system, and the filter backwash water is discharged to the secondary air flotation equipment and circulated in the system Treatment reduces the cost of water production and sewage discharge, and considers the disposal of pretreated sludge and scum.

[0014] In the technical solutions of the above two embodiments, many specific examples can be combined after arbitrarily selecting the medicament and the limited dosage, all of which can better achieve the purpose of the present invention.

Embodiment 3

[0015] Example 3, combined with figure 2 , the advanced treatment and comprehensive utilization pilot project of the isolated four pollutants, the complete process flow has been given in the accompanying drawings, combined with the medicament and dosage given in the above Example 1, it constitutes a more complete treatment method, no longer Do a text description. The project processing scale: product water 1000m 3 / d (for preparing polymer mother liquor), concentrated water 1000m 3 / d (for reinjection) to reach full capacity.

[0016] The input amount of the present invention is relative to the amount of sewage treatment.

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Abstract

The invention relates to a treatment method realizing polymer-bearing produced wastewater resource utilization, which is based on flotation-filtration, double filtering, fine filtration and double-membrane filtration. The invention is characterized in that flotation-filtration includes two stages; an organic polymer reverse demulsifier is added at the first-stage flotation inlet as a deoiling agent; one or more of an inorganic salt coagulant, an inorganic polymer salt coagulant and an organic polymer coagulant is added at the second-stage flotation inlet as a coagulant; NaOH solution with volume concentration of 5-10% is added at the inlets of a back flushing pump of a double filter and a fine filter; and one or more of chlorine dioxide, quaternary ammonium salt, glutaraldehyde or halogenated phenol is added at the inlet of the double filter as a bactericide. The wastewater treated by the method has total mineralization being not more than 250mg / L and conductivity being less than 600ms / cm. The method is used for preparing polymer mother liquid and can improve the oilfield polymer injection development effect, save water resources and finally realize polymer-bearing produced wastewater resource utilization.

Description

technical field [0001] The invention relates to the technical field of oil production sewage treatment, in particular to a treatment method for resource utilization of oil production sewage containing polymer. Background technique [0002] At this stage, the main method of treating oilfield wastewater containing polymers is the air flotation method. Most of the oil, polymers and suspended solids in the water can be removed through the air flotation machine, and the treated sewage is then filtered (double filter material filtration and fine filtration) After filtration, oil, polymers and suspended solids in the sewage are further removed. Because the polymer-containing oil production sewage of oil fields contains polymers, the viscosity of the sewage is doubled, and the oil-carrying capacity of the water phase is increased; the particle size of the oil droplets in the sewage is small, the average particle size is 3-5 μm, and the proportion of emulsified oil is more than 90%; ...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F103/10
Inventor 张晓云封象水刘辉杨书环
Owner SENUO TECH CO LTD
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