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Skid-mounted lightweight oily sewage treatment device and treatment technology thereof

A treatment device and treatment process technology, applied in the direction of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the inconvenience of oil production station construction, packing fouling, frequent equipment cleaning, etc. question

Active Publication Date: 2015-06-17
BEIJING OTC ENERGY & ENVIRONMENT ENGINEERING PUBLIC LIMITED COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the above-mentioned oily sewage treatment technology, the system involves a lot of equipment, high maintenance cost, inconvenient for oil production stations with small water flow, serious scaling and corrosion of equipment, serious packing fouling, frequent cleaning of equipment, and subsequent treatment processes and devices. For problems such as higher requirements, the present invention provides a skid-mounted light oily sewage treatment device and treatment process for high oil content in sewage

Method used

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  • Skid-mounted lightweight oily sewage treatment device and treatment technology thereof
  • Skid-mounted lightweight oily sewage treatment device and treatment technology thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Index of main pollutants in the treatment of tank bottom sludge sewage with strong fluidity in an oilfield

[0055] serial number

oil (mg / L)

SS(mg / L)

Median particle size (μm)

1 (standard value)

6

2

1.5

2 (incoming water quality)

2500

2000

——

3 (outlet water quality)

3

1.82

1.25

[0056] The front end of the oil sludge at the bottom of the tank has undergone fluidization treatment. It can be seen from Table 1 before entering the device of the present invention that oil is the main pollutant. The present invention mainly takes sewage with relatively high oil content in raw water as the removal target. substances were effectively removed.

[0057] According to technological process of the present invention (as figure 2 ), the processing method and results are as follows:

[0058] (1) Coagulation treatment: The oil content in the wastewater is 2500mg / L, after the high-pressure pump 2 (e...

Embodiment 2

[0063] Main indicators of oily wastewater treatment in a heavy oil area of ​​Liaohe Oilfield

[0064] serial number

oil (mg / L)

SS(mg / L)

Median particle size (μm)

1 (standard value)

6

2

1.5

2 (incoming water quality)

3000

1800

——

3 (outlet water quality)

2.34

1.57

1.25

[0065] With the method of the present invention, the oily sewage in the heavy oil area of ​​Liaohe Oilfield is processed, and the processing method and results are as follows:

[0066] (1) Coagulation treatment: the oil content in the wastewater is 3000mg / L, after the high-pressure pump 2 (equipped with a frequency conversion system, the water inlet pressure is controlled at 0.4-0.8MPa), 1.5mg / L of degreaser is added, and separated in the first-stage cyclone After the hydraulic mixing in the device 3, the outlet water was sampled, the oil content in the water was 1100mg / L, the removal rate was 63%, the suspended matter was 1780...

Embodiment 3

[0071] Main indicators of oily wastewater treatment in a heavy oil area of ​​Karamay Oilfield, Xinjiang

[0072] serial number

oil (mg / L)

SS(mg / L)

Median particle size (μm)

1 (standard value)

6

2

1.5

2 (incoming water quality)

2875

2100

——

3 (outlet water quality)

2.46

1.13

1.32

[0073] With the method of the present invention, the oily sewage in the heavy oil area of ​​Liaohe Oilfield is processed, and the processing method and results are as follows:

[0074](1) Coagulation treatment: the oil content in the wastewater is 2875mg / L, after the high-pressure pump 2 (equipped with a frequency conversion system, the water inlet pressure is controlled at 0.4-0.8MPa), 1.25mg / L of degreaser is added, and separated in the first-stage cyclone After the hydraulic mixing in the device 3, the outlet water was sampled. The oil content in the water was 1955 mg / L, the removal rate was 68%, the suspended mat...

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Abstract

The invention provides a skid-mounted lightweight oily sewage treatment device and a treatment technology of the device. The device sequentially comprises a primary pressure pump (2), a primary cyclone separator (3), a secondary pressure pump (4), a secondary cyclone separator (5), a pipeline mixer (6), a suspension sludge treatment device (7) and a storage tank. The technology employs a physicochemical method, and sewage continues to enter the suspension sludge equipment for coagulation, settling and filtration after an agent and water are intensively mixed by the cyclone separators. According to the device and the method, the agent and the water are mixed ingeniously to achieve the purpose of oil and suspended matter removal; a technology system is simple; high oily sewage in an oil field is treated stably; the operating cost is lower; filling replacement is not required; the equipment maintenance cost is low; operation immediately after shutdown can be achieved according to field requirements; equipment transportation is convenient; the floor area is small; and station construction treatment for a field is not required.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a skid-mounted light oily sewage treatment device and a treatment process thereof. Background technique [0002] Oily sewage comes from the formation associated water produced in the production process of oil and gas fields. This associated water contains crude oil, suspended solids and other complex mineral impurities in the formation. Direct discharge not only pollutes the environment, but may also cause water shortage in the formation. Disasters caused by support cannot continue to increase continuous oil recovery. Therefore, oil production wastewater must be treated before it can be reinjected into the formation. However, in some formations, the oil content in the produced water is relatively high, and the commonly used treatment processes in oil fields cannot effectively treat the oil contained in the water. For example, in heavy oil areas, when the sewage produced by scatt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04
Inventor 陈茗张勇张余凯
Owner BEIJING OTC ENERGY & ENVIRONMENT ENGINEERING PUBLIC LIMITED COMPANY
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