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High silicon-containing waste water in oil field reuse boiler pretreatment technology and apparatus

A pretreatment device and pretreatment technology, applied in mining wastewater treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problems of large amount of sludge, high treatment cost, and large investment in equipment , achieve the effect of high selectivity, simple regeneration method and fast speed

Active Publication Date: 2012-12-19
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the use of adsorption to remove silicon to solve the problem of scaling in thermal recovery boilers has indeed solved some problems in water injection to a certain extent, but there are disadvantages such as high treatment costs, large investment in equipment, and large amounts of sludge that are unfavorable to oil production. Phenomenon

Method used

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  • High silicon-containing waste water in oil field reuse boiler pretreatment technology and apparatus
  • High silicon-containing waste water in oil field reuse boiler pretreatment technology and apparatus
  • High silicon-containing waste water in oil field reuse boiler pretreatment technology and apparatus

Examples

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Effect test

Embodiment 1

[0041] This embodiment provides a boiler pretreatment device for reuse of oilfield high-silicon-containing wastewater, the structure of which is as follows: figure 1 shown.

[0042] The oilfield high silicon-containing waste water reuse boiler pretreatment device includes sequentially connected: an adjustment tank, a sedimentation tank, a flotation tank, a filter, a weak acid resin softener and a chelating resin softener.

Embodiment 2

[0044] This embodiment provides a boiler pretreatment device for reuse of oilfield high-silicon-containing wastewater, the structure of which is as follows: figure 2 shown.

[0045] The pretreatment device includes sequentially connected: regulating tank, first dosing tank, sedimentation tank, second dosing tank, flotation tank, first filter, second filter, weak acid resin softener and chelating resin softener device;

[0046] Among them, the first filter is a double filter material filter: the tank diameter × height is Φ1200mm × 3572mm, the filtration rate is 11.1m / h, the filter material is anthracite and walnut core, the control mode is batch automatic, and the quantity is 1 set; In the container, the upper layer is anthracite, the lower layer is walnut core, and the layer heights of anthracite and walnut core are 0.2-1.0m and 0.4-2.0m respectively;

[0047] The second filter is a multi-media filter: the tank diameter × height is Φ1200mm × 3572mm, the filtering speed is 1...

Embodiment 3

[0069] This embodiment also provides a boiler pretreatment process for oilfield high-silicon-containing wastewater reuse boiler, which is a process for pretreating heavy oil sewage using the device provided in Example 2, a weak acid resin softener and a chelating resin softener The specific parameters of the resin added in are shown in Table 5. The pretreatment process includes the following specific steps:

[0070] Introduce the heavy oil sewage into the adjustment tank for proper adjustment, and adjust the amount of water entering the follow-up treatment facilities to be 10-20% of the high silicon-containing wastewater in the oil field;

[0071] Make the heavy oil sewage from the adjustment tank enter the first dosing pool, and put 60mg / L PR106 reverse phase demulsifier into the sewage for demulsification treatment;

[0072] Let the heavy oil sewage from the first dosing tank enter the sedimentation tank for sedimentation, and settle for 30 minutes. The oil-water separation...

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Abstract

The invention relates to a high silicon-containing waste water in an oil field reuse boiler pretreatment technology and an apparatus. The pretreatment technology comprises the following steps: adjusting the high silicon-containing waste water in the oil field and adding a reverse demulsifier; depositing the adjusted waste water, separating oil and water and removing the impurity in the waste water; adding a salt substance in the waste water after deposition treatment and performing air floatation treatment, removing an dissolved organic matter and oil, filtering the waste water after the air floatation treatment and removing suspended matters; using filtering weak acid resin for preliminarily softening the filtered waste water, reducing the concentration of high valent cationic to ppm grade, using chelate resin for deeply softening the waste water after preliminary softening, and reducing the concentration of high valent cationic to ppb grade to obtain the high silicon-containing waste water after pretreatment in the oil field. The invention also provides the high silicon-containing waste water in oil field reuse boiler pretreatment apparatus.

Description

technical field [0001] The invention relates to a boiler pretreatment process and device for reuse of oilfield high-silicon-containing wastewater, and belongs to the technical field of oilfield wastewater treatment. Background technique [0002] At present, my country's oilfields produce a large amount of heavy oil sewage every year, among which the amount of heavy oil sewage in Liaohe Oilfield is about 2340×104t / year. [0003] At present, the commonly used wastewater silicon removal processes mainly include chemical coagulation, ion exchange, electrocoagulation and reverse osmosis. Among them, the chemical coagulation method is a widely used and low-cost treatment method, but it can only control the concentration of silicon in the effluent to a few mg / L level. Ion exchange can effectively remove silicon in oilfield produced water, but it has no ability to remove colloidal silicon. Electrocoagulation removal of silicon has a good effect on the removal of bacteria and heavy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F103/10
Inventor 蒋生健谢加才刘喜林范英才孙守国董滨曲金明韩海龙
Owner PETROCHINA CO LTD
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