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Oil removal system and method for high-concentration oily sewage

An oily sewage, high concentration technology, applied in water/sewage treatment, chemical instruments and methods, water/sewage multi-stage treatment, etc., can solve problems such as low oil-water separation efficiency, and achieve the effect of improving oil-water separation speed

Pending Publication Date: 2022-05-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is: to overcome the deficiencies of the prior art, and to provide a combination of cyclone degreasing, ultrasonic demulsification and sedimentation degreasing at the same time to separate oily water from oily sewage, which can solve the problem of existing high-concentration oily water. The problem of low oil-water separation efficiency of oil removal technology in wastewater treatment technology ensures the stability of sewage water quality after oil removal, creates good conditions for subsequent biochemical and advanced treatment, and is conducive to the long-term stable operation of sewage treatment system. High-concentration oily sewage removal Oil systems and methods

Method used

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  • Oil removal system and method for high-concentration oily sewage
  • Oil removal system and method for high-concentration oily sewage

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Such as figure 1As shown, a degreasing system for high-concentration oily sewage (hereinafter referred to as the degreasing system) includes a cyclone degreasing device 1, an ultrasonic demulsification reactor 5 and a corrugated degreasing device 13 placed in sequence. The oily sewage is connected to the inlet of the cyclone degreaser 1 through the pipeline. The oily sewage is introduced into the cyclone degreaser from the tangential inlet at relative pressure or speed, and the oily sewage runs at high speed in the cyclone degreaser 1 to form a centrifugal force field. Under the effect of centrifugal force, the relatively dense water is thrown to the surroundings, and moves downward toward the wall, and finally is discharged from the drain at the bottom and connected to the inlet of the water inlet pump 20 through a pipeline; the less dense oil migrates to It operates in the middle and upwards, and finally discharges from the overflow port in the center, and is connect...

Embodiment 2

[0073] The difference between this embodiment and Embodiment 1 is that in this embodiment, the parameters in the oil-water separation process of oily sewage are different. In this embodiment, the oily sewage with a petroleum content of 2000mg / L enters the cyclone degreaser 1, and the water flow rate is 6m 3 / h, the working pressure inside the cyclone degreaser 1 is 0.7MPa, and the oil droplet size of the effluent is 5~10μm after testing. At this time, the power of the low-frequency adjustable ultrasonic generator 3 is 150w, and the output frequency of the ultrasonic wave is 20kHz; the power of the high-frequency adjustable ultrasonic generator 6 is 150w, and the output frequency of the ultrasonic wave is 60kHz.

[0074] Now in the ultrasonic demulsification reactor 5, the ultrasonic transducer rod 19 is alternately operated by the transducer tool head of 20kHz and 40kHz, and the ultrasonic transducer 18 works at 80kHz and 60kHz, and the reaction time in the reactor is 15min ,...

Embodiment 3

[0076] The difference between this embodiment and Embodiment 1 is that in this embodiment, the parameters in the oil-water separation process of oily sewage are different. In this embodiment, the oily sewage with a petroleum content of 800mg / L enters the cyclone degreaser 1, and the water flow rate is 5m 3 / h, the working pressure inside the cyclone degreaser 1 is 1.0MPa, and the oil droplet size of the effluent is 1~2μm after testing. At this time, the power of the low-frequency adjustable ultrasonic generator 3 is 300w, and the output frequency of the ultrasonic wave is 20kHz. The power of the high-frequency adjustable ultrasonic generator 6 is 70w, and the output frequency of the ultrasonic wave is 60kHz.

[0077] Now in the ultrasonic demulsification reactor 5, the ultrasonic transducer rod 19 works alternately by the transducer tool head of 30kHz and 40kHz, and the ultrasonic transducer 18 works at 100kHz, 80kHz and 60kHz, and the reaction time in the reactor is for 15 m...

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Abstract

The invention discloses an oil removal system and method for high-concentration oily sewage, and belongs to the technical field of oily sewage treatment. The device is characterized by comprising a cyclone oil remover (1), an ultrasonic demulsification reactor (5) and a corrugated oil removal device (13) which are sequentially arranged, wherein an ultrasonic transduction unit and an ultrasonic generator are arranged on the ultrasonic demulsification reactor (5); a particle size detector (2) is arranged at an inlet of the ultrasonic demulsification reactor (5), a separation detector (8) and a return pipeline are arranged on an outlet pipeline, and the other end of the return pipeline is connected with the inlet of the ultrasonic demulsification reactor (5). According to the oil removal system and method for the high-concentration oil-containing sewage, oil-water separation is carried out on the oil-containing sewage in a combined mode of rotational flow oil removal, ultrasonic demulsification and sedimentation oil removal, the problem that the oil-water separation efficiency of an oil removal technology in an existing high-concentration oil-containing sewage treatment technology is low can be solved, and it is ensured that the water quality of the oil-removed sewage is stable.

Description

technical field [0001] The invention discloses an oil removal system and method for high-concentration oily sewage, belonging to the technical field of oily sewage treatment. Background technique [0002] With the continuous development of my country's industrial technology, a large amount of oily sewage will be produced in industries such as petroleum exploration, petroleum refining, petrochemical industry, oil product storage and transportation, machinery manufacturing, and food processing. The purpose of oily sewage treatment is to remove suspended solids, oil, additives and other unfavorable components that may cause system corrosion and scaling; there are many oil-water separation technologies today, and commonly used methods include gravity separation, air flotation, crude oil Granulation method, filtration method, adsorption method, ultrasonic method and other technologies. Since the emulsified oil with a particle size of less than 10 μm in wastewater is difficult to...

Claims

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Application Information

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IPC IPC(8): C02F9/08
CPCC02F9/00C02F1/38C02F1/36C02F1/40C02F2201/002C02F2209/00C02F2303/14
Inventor 刘婷婷徐鹏捷李波潘咸峰梁明
Owner CHINA PETROLEUM & CHEM CORP
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