Oil-contained sewage treatment method and eddy energy fast-cyclone separating system of special equipment for method

A treatment method and sewage technology, applied in flotation water/sewage treatment, flocculation/sedimentation water/sewage treatment, etc., can solve problems such as cumbersome installation, high investment costs, releaser blockage, etc., and achieve floc water content and specific gravity Effects of lowering, strong self-floating ability, and increased charge utilization

Active Publication Date: 2012-08-22
上海齐国环境科技有限公司
View PDF8 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing traditional air flotation method has several disadvantages in the treatment of oily wastewater: oil slicks are difficult to handle, and the flotation time stays for a long time; sludge is easily deposited at the bottom of the air flotation tank, and the releaser is frequently blocked; The equipment occupies a large area and the investment cost is high; the integrity of the equipment is not complete and the installation is cumbersome; for the oily wastewater mainly emulsified oil and dissolved oil, the removal effect of traditional air flotation is not good
However, judging from the structural diagram attached to the patent, there are some problems in the discharge of the oil and bubble scum that rise to the top of the tank
Especially the offshore oil production platform or FPSO will be in a sloshing state due to the action of waves, waves, and currents. At this time, the liquid level inside the tank is difficult to maintain stable, resulting in excessive water content in the oil discharged from the device and the air bubble scum. High, which seriously affects the separation effect
[0014] It can be seen from the above that the current existing treatment technologies are difficult to achieve good treatment effects on oily sewage, especially when the components of oily sewage become more and more complex, the treatment becomes more and more difficult

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Oil-contained sewage treatment method and eddy energy fast-cyclone separating system of special equipment for method
  • Oil-contained sewage treatment method and eddy energy fast-cyclone separating system of special equipment for method
  • Oil-contained sewage treatment method and eddy energy fast-cyclone separating system of special equipment for method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Treatment of emulsified oil sewage in a factory

[0040] Raw water situation: sewage flow 5m 3 / hr. Raw water emulsified oil 5,000~8,000mg / L, containing aluminum chips, aluminum ions, PH 8~9.

[0041] Such as figure 1 with figure 2 As shown, after quantitatively adding the medicament polyacrylamide powder into the mixing tank 2 through the hopper 1, turn on the mixer 3, and evenly stir with the tap water added quantitatively to form a solution with a certain concentration;

[0042] Use the high-pressure water inlet pump 5 to input the above-mentioned raw (sewage) water into the swirl speed difference three-phase mixer 6 to form a vortex, and then use the dosing metering pump 4 to enter the prepared medicine and compressed air into the swirl speed difference three-phase mixer 6 Dissolved in the influent wastewater, because the sewage forms multiple vortices in the three-phase mixer 6 with a swirl velocity difference, a sufficiently long streamline is generated, whic...

Embodiment 2

[0055] Pretreatment of kitchen waste water in an airport, with a flow rate of 20m 3 / hr

[0056] Raw water condition: raw water BOD=3,000mg / L, COD=4,000-8,000mg / L, oil 1,500mg / L and basically emulsified oil, contains a lot of surfactant, TSS=2,500mg / L, PH=4~13

[0057] The original treatment process: the traditional air flotation is used for pretreatment.

[0058] Original process problem: Coagulation and demulsification often fail, and the oil content in the effluent seriously exceeds the standard, resulting in the failure of the subsequent biochemical system to operate normally. Oily sludge is difficult to deal with, and the foam is serious.

[0059] The treatment results of the vortex energy speed spin separator (Haines) of the present invention:

[0060] The removal rate of oil is as high as 98%, and the oil content in the effluent is only 20-30 mg / L, which greatly saves the area occupied. The generated sludge is less than 1 / 3 of the original system, and it is very eas...

Embodiment 3

[0063] Reinjection water treatment in an oilfield, flow rate 5m 3 / hr

[0064] Original treatment process: The reinjection water treatment station is divided into two levels. The first-stage process is: primary settling tank→secondary settling tank→boost buffer tank→coarse sand filter tank. After the first-stage treatment, the oil content in the effluent is 30mg / L, and the suspended matter is about 20mg / L; the effluent enters the second stage. The process, the secondary process is: primary settling tank → secondary settling tank → multimedia filter → walnut shell filter → external infusion water.

[0065] Original process problem: Since the oil field uses oil from the ternary zone, part of the oil in the reinjection water has been emulsified, and the emulsified oil cannot be removed by oil separation + filtration. Therefore, after the secondary treatment process, the effluent can only reach: suspended solids <30mg / L, oil <30mg / L, seriously exceeding the standard, and failing...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses an oil-contained sewage treatment method and an eddy energy fast-cyclone separating system (Haynes) of special equipment for the method. Oil-contained sewage enters a multilevel cyclone speed three-phase mixer together with a prepared reagent and compressed air, the multilevel three-phase mixer makes the reagent be adequately contacted with the contaminants to form micro floc and makes the compressed air enter a releasing cavity after being adequately dissolved in the sewage, the dissolved gas in the floc is slowing released in the releasing cavity as the pressure is reduced, so the moisture inside the floc is squeezed out, the gas and solid floc form a porous hollow shape, the moisture content is remarkably reduced, the specific gravity is lighter, finally the floc after forming the scum enters a separating tank, the scum is scraped by a scraping machine above the separating tank, the scraped scum is discharged by a connected hopper to be subsequently dehydrated, the separated water overflows to a water outlet groove through a water outlet weir plate to be discharged through a water outlet pipe. According to the oil-contained sewage treatment method and the separating system, advantages of good treatment effect, reagent conservation, less sludge, less investment, simpleness in control, low maintenance expense and the like can be realized.

Description

[0001] technical field [0002] The invention belongs to the field of sewage treatment, and is especially suitable for the treatment of oily sewage such as oilfield reinjection water, emulsified oil-containing wastewater, and kitchen wastewater. [0003] Background technique [0004] With the development of economy and society, wastewater pollution is increasing day by day, and environmental pollution is getting more and more attention from the people. Oily wastewater is common in many wastewaters, and it is easy to cause environmental pollution. Industrial and domestic wastewater is seriously harmful, and its treatment is domestic and foreign have drawn great attention. At present, oily wastewater will be produced in the process of oil exploration, oil refining, petrochemical industry, vehicle cleaning, machinery manufacturing, food processing, etc. Once oily pollutants enter the water body, they immediately spread on the water surface to form an oil film, preventing...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/24C02F1/52
Inventor 於剑霞
Owner 上海齐国环境科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap