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Silica and oil removing system for oily sewage

An oil system and sewage technology, which is applied in the fields of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., which can solve the problem of increasing the processing pressure in the silicon removal process, difficulty in worker operations, and complex technological processes, etc. problems, to achieve the effect of saving investment costs, simplifying the process flow, and simplifying the process flow

Inactive Publication Date: 2012-07-18
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. Oil removal and silicon removal are treated separately, the process is complex and difficult for workers to operate; 2. The sewage treated by this technology can meet the national boiler water standard, but a large amount of calcium, magnesium ions and silicon Acid radical ions increase the treatment pressure in the silicon removal link, and the treatment cost is relatively high. The operating cost of this technology in the sewage treatment station of Shuyi District of Liaohe Oilfield is 5.17 yuan / m3

Method used

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  • Silica and oil removing system for oily sewage
  • Silica and oil removing system for oily sewage
  • Silica and oil removing system for oily sewage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0097] The dosage and treatment effect of each process are shown in the following table:

[0098]

[0099] Among them, the residence time in 1 is 20h, the residence time in 2 is 2h, the residence time in 3 is 1h, the residence time in 4 is 0.5h, and the residence time in 5 is 0.1h.

[0100] D-1 is sodium hydroxide agent, D-2 is magnesium sulfate agent, D-3 is polyaluminum chloride agent, D-4 is cationic polyacrylamide agent, and D-5 is aluminum chloride agent.

Embodiment 2

[0102] Using this composite process to treat oily sewage, the dosage of chemicals in each process and the treatment effect are shown in the following table:

[0103]

[0104] Among them, the residence time in 1 is 30h, the residence time in 2 is 5h, the residence time in 3 is 2h, the residence time in 4 is 0.5h, and the residence time in 5 is 1h.

[0105] D-1 is sodium hydroxide agent, D-2 is magnesium sulfate agent, D-3 is polyaluminum chloride agent, D-4 is cationic polyacrylamide agent, and D-5 is anionic polyacrylamide agent.

Embodiment 3

[0107] Using this composite process to treat oily sewage, the dosage of chemicals in each process and the treatment effect are shown in the following table:

[0108]

[0109] Among them, the residence time in 1 is 35h, the residence time in 2 is 8h, the residence time in 3 is 1h, the residence time in 4 is 0.5h, and the residence time in 5 is 1h.

[0110] D-1 is sodium hydroxide agent, D-2 is magnesium sulfate agent, D-3 is polyaluminum chloride agent, D-4 is cationic polyacrylamide agent, D-5 is cationic polyacrylamide agent, D-6 For iron sulfate medicament.

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Abstract

The invention discloses a silica and oil removing system for oily sewage, which comprises an oil removing device, a silica and oil removing pond, a filtering device and a softening device successively communicated via pipelines. The viscous oil sewage is connected with a liquid inlet of the oil removing device via a pipeline, the treated oily sewage is delivered out via the softening device, the silica and oil removing agent is added into the pipeline via a agent feeding system and fully reacts with the oily sewage in the silica and oil removing pond, the activated silica and captured oil are polymerized into large-particle oil, suspended matter and non-activated silica to be settled, and activated silica, oil and suspended matter and non-activated silica in the oily sewage are removed through mud and water separation. With the silica and oil removing system, the process flow of silica and oil removal is simplified, the operation is convenient, and the operating cost of sewage treatment is reduced.

Description

Technical field [0001] The invention relates to the field of sewage treatment, in particular to a desiliconization and degreasing system for oily sewage. Background technique [0002] At present, the domestic oily sewage recycling boiler treatment is divided into four parts: sewage pretreatment, degreasing, silicon removal, and advanced treatment. The sewage treated by this technology can meet the national boiler water standard. The existing technology can not only effectively treat oily sewage, Moreover, the characteristics of the sewage can be fully utilized to make its resource utilization. [0003] Chinese patent CN 1562814 discloses a heavy oil sewage treatment and reuse thermal recovery boiler feed water process. The main sewage treatment process steps used are that the heavy oil sewage treatment process water is transported to the regulating cylinder through the PPR non-metallic pipeline, and then to the pipeline Add chemical agents inside, and use a lifting pump to lift th...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F9/06C02F9/10C02F9/14
Inventor 樊金明陈永恒林军马达波张勇张洪驰刘忠祥赵文峰范宏岩郭金鹏孙振彪赵梓涵迟洪军赵红杰姜城
Owner PETROCHINA CO LTD