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Oily wastewater treatment equipment and process

A technology for wastewater treatment and equipment, which is applied in the fields of light water/sewage treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. The problem of large land area, etc., can reduce the cost of oil removal, improve the oil-water separation efficiency, and achieve the effect of small footprint.

Inactive Publication Date: 2018-08-21
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to propose a kind of oily wastewater treatment equipment to solve the problems of low oil removal efficiency, large footprint of oil removal equipment and high oil removal cost in the prior art

Method used

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  • Oily wastewater treatment equipment and process
  • Oily wastewater treatment equipment and process
  • Oily wastewater treatment equipment and process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] This embodiment proposes a kind of oily wastewater treatment equipment, such as figure 1 As shown, the oily wastewater treatment equipment includes a demulsification treatment device and an oil-water separation device 4. The demulsification treatment device includes a demulsification tank 1. The demulsification tank 1 is connected with an ultrasonic generator 2. The demulsification tank 1 is also connected with a water inlet pipe. 11 and an outlet pipe 12, the outlet pipe 12 is used to connect the demulsification tank 1 and the oil-water separation device 4, the high-pressure pump 121 is arranged on the outlet pipe 12 of the demulsification tank 1, and the high-pressure pump 121 pumps the waste water in the demulsification tank 1 into Oil-water separation device 4. The oil-water separation device 4 in the present embodiment comprises a biconical hydrocyclone 41, and the bottom flow pipe of the biconical hydrocyclone 41 is connected with the waste water pool 42, and the ...

Embodiment 2

[0053] The difference between the oily wastewater treatment equipment in this embodiment and the first embodiment is that, as figure 2 As shown, the ultrasonic generating device in the oily wastewater treatment equipment is replaced by a microwave generating device 3. The microwave generating device 3 includes a waveguide 31 and a magnetron 32. The waveguide 31 extends into the demulsification tank 1 and is located in the demulsification tank 1. On the top, the control unit 5 is connected to the magnetron 32 . Microwave demulsification uses thermal and non-thermal effects to demulsify. By destroying the oil-water interface film, water molecules break through the surface tension of the oil film, move up and down freely, magnetically collide, and coalesce to achieve oil-water separation. Microwave demulsification can reduce the loss of demulsifiers. Demulsification is achieved with or without the use of demulsifiers. The oily substances in the oily wastewater after demulsifica...

Embodiment 3

[0056] The difference between the oily wastewater treatment equipment in this embodiment and the first embodiment is that, as image 3 As shown, the oily wastewater treatment equipment includes an ultrasonic generating device 2 and a microwave generating device 3 at the same time, and the oily wastewater is demulsified by ultrasonic waves and microwaves at the same time, which can improve the oil removal rate. The ultrasonic demulsification method uses the mechanical vibration and thermal effect of the ultrasonic wave to break the demulsification, while the microwave demulsification uses its thermal effect and non-thermal effect to demulsify. The two methods of demulsification are physical demulsification, which can reduce the use of demulsifier or not use demulsifier to achieve the demulsification effect, avoid the use of chemical reagents, and thus avoid the secondary pollution of chemical reagents to wastewater. The combination of physical demulsification and double-cone hy...

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Abstract

The invention discloses oily wastewater treatment equipment and process. The oily wastewater treatment equipment comprises a demulsification treatment device and an oil-water separation device, wherein the demulsification treatment device comprises a demulsification tank, an ultrasonic generator and / or a microwave generator are connected inside the demulsification tank, the demulsification tank isconnected with the oil-water separation device through a high-pressure pump, and the high-pressure pump pumps wastewater in the demulsification tank into the oil-water separation device. The oil-containing wastewater treatment process comprises the following steps: demulsifying the oily wastewater by ultrasonic waves and / or microwaves; performing oil-water separation on demulsified liquid. The oily wastewater is demulsified by the ultrasonic waves and / or microwaves, so that the oil removal rate can be increased. The two demulsification methods are both physical demulsification, use of chemical reagents can be avoided, and accordingly, secondary pollution caused by the chemical reagents is prevented. Moreover, the demulsification tank, the microwave generator and a bi-cone hydrocyclone occupy a small area, so that the oil removal cost is reduced compared with the traditional oil removal cost.

Description

technical field [0001] The invention relates to the technical field of separation of different phases, in particular to an oily wastewater treatment equipment and process. Background technique [0002] Oily wastewater mainly includes oilfield wastewater, refinery wastewater, petrochemical plant wastewater, tanker cleaning water, and tanker ballast water, tank washing water, engine room water, etc. If oily wastewater is not recycled, it will cause a waste of water resources, and if it is discharged into rivers, lakes or bays, it will pollute the water body and affect the survival of aquatic organisms. If it is used for agricultural irrigation, the oily substances will block the soil voids and hinder Crops grow. Therefore, the treatment of oily wastewater should first consider the recovery of oily substances. [0003] At present, the degreasing of oily wastewater is mainly carried out through the oil separation tank and the flotation tank, that is, the traditional "one separ...

Claims

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Application Information

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IPC IPC(8): C02F9/08B01D17/04B01D17/05
CPCB01D17/04B01D17/047C02F1/30C02F1/38C02F1/40C02F9/00
Inventor 曹宏斌宁朋歌隋元伟李玉平
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI