Method and apparatus for treating high-concentration emulsion wastewater

A treatment method and technology of treatment devices, which are applied in the directions of multi-stage water treatment, water/sewage treatment, chemical instruments and methods, etc., can solve the problems of paralysis of biochemical systems, low oxygen content, affecting treatment process, etc., and reduce COD. and color value, strong impact resistance, high color value removal rate

Pending Publication Date: 2018-07-06
NANJING YUANQUAN TECH CO LTD
View PDF8 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. The demulsification effect is unstable, and the oil content of the clear liquid after air flotation and precipitation is high, which affects the subsequent treatment process;
[0006] 2. Air flotation or coagulation sediment can only be used for hazardous waste treatment, and the water content is high, which makes the treatment cost higher;
[0007] 3. It is difficult to dehydrate and solidify the sediment by conventional processes, which seriously affects the normal operation of dehydration equipment (plate and frame filter press);
[0008] 4. The operation of the biochemical system is unstable. Due to the high oil content, the oxygen content in the water body is low, which easily leads to the paralysis of the biochemical system
Patent CN103030252A discloses a membrane treatment process for emulsion wastewater. Although the final effluent quality of this method is better; but this method will produce membrane concentrate that cannot be processed, which will cause pollution to the environment

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
  • Method and apparatus for treating high-concentration emulsion wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Emulsion wastewater (COD 200g / L, chroma 800, salt content 0.5%, oil content 5600mg / L) first enters the inorganic ceramic membrane filtration device, the pore size of the ceramic membrane is 50nm, and the oil-water separation is carried out under the operating pressure of 0.3MPa to obtain the inorganic membrane Concentrates and serums. The oil content of the inorganic membrane concentrate is 60g / L, and it is directly incinerated; the clear liquid (COD 31200mg / L, chroma 790, salt content 0.5%, oil content 300mg / L) passes through a heat exchanger and a heat transfer oil heat exchanger After heating in sequence, the temperature reaches 230°C, and it is continuously passed into the catalytic reaction tower, and CuO / Al is filled in the catalytic reaction tower. 2 o 3 Catalyst, the CuO loading capacity is 4.46 (wt)%, with catalyst effective component CuO, the consumption of catalyst is 300g / ton to treat waste water), and constantly feed pure oxygen in the system (passage is 3...

Embodiment 2

[0053] The emulsion wastewater (COD 250g / L, chroma 900, salt content 0.6%, oil content 6000mg / L) first enters the inorganic ceramic membrane filtration device, the ceramic membrane pore size is 50nm, and the oil-water separation is carried out under the operating pressure of 0.3MPa to obtain the inorganic membrane Concentrates and serums. The oil content of the inorganic membrane concentrate is 65g / L, and it is directly incinerated; the clear liquid (COD 25200mg / L, chroma 850, salt content 0.6%, oil content 330mg / L) passes through a heat exchanger and a heat transfer oil heat exchanger After heating in sequence, the temperature reaches 240°C, and it is continuously passed into the catalytic reaction tower, and CuO-MnO / Al is filled in the catalytic reaction tower. 2 o 3 Catalyst (CuO loading 3.53 (wt) %, MnO loading 2.34 (wt) %, based on the total amount of catalyst active components CuO, MnO, the consumption of catalyst is 300g / ton of waste water to be treated), and constantl...

Embodiment 3

[0055] Emulsion wastewater (COD 300g / L, chroma 700, salt content 0.4%, oil content 4800mg / L) first enters the inorganic ceramic membrane filtration device, the ceramic membrane pore size is 50nm, and the oil-water separation is carried out under the operating pressure of 0.3MPa to obtain the inorganic membrane Concentrates and serums. The oil content of the inorganic membrane concentrate is 70g / L, which is directly incinerated; the clear liquid (COD 35000mg / L, chroma 680, salt content 0.4%, oil content 200mg / L) passes through a heat exchanger and a heat transfer oil heat exchanger After heating in sequence, the temperature reaches 245°C, and it is continuously passed into the catalytic reaction tower, and CuSO is loaded into the catalytic reaction tower at the rate of 300g / ton of waste water to be treated. 4 Ionic state catalyst, and continuously feed pure oxygen into the system (the amount of feed is 3m 3 / h), the residence time of wastewater in the catalytic oxidation tower...

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

PropertyMeasurementUnit
pore sizeaaaaaaaaaa
chemical oxygen demand (mass)aaaaaaaaaa
pore sizeaaaaaaaaaa
Login to view more

Abstract

The invention discloses a method for treating high-concentration emulsion wastewater. The comprises the following steps: the high-concentration emulsion wastewater is filtered by an inorganic membraneto perform oil-water separation in order to obtain an inorganic membrane liquid concentrate and a clear liquid; the clear liquid enters a catalytic oxidation system and undergoes catalytic oxidationtreatment; catalytic oxidation treatment effluent is adsorbed by activated carbon, enters an ultrafiltration membrane device, and is ultrafiltered to obtain an ultrafiltered liquid concentrate and ultrafiltration membrane effluent; the ultrafiltered liquid concentrate returns to the catalytic oxidation system, and is mixed with a supernatant, and the obtained mixture is oxidized; and the ultrafiltration membrane effluent enters a reverse osmosis membrane device, and undergoes reverse osmosis treatment to obtain a reverse osmosis liquid concentrate and a permeate, and the reverse osmosis liquidconcentrate returns to the catalytic oxidation system and is oxidized. The inorganic membrane adopted in the method can resist high oil and high solid content treatment during separation, and the whole system has a good stability and a strong impact resistance; and a catalytic oxidation technology adopts a small amount of reagents, is a pure chemical treatment technology, and does not produce liquid concentrate, sludge or other pollutants.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, and in particular relates to a treatment method and device for high-concentration emulsion wastewater. Background technique [0002] Emulsions are widely used in metal processing such as grinding and forging, and their main functions are lubrication, cooling, surface cleaning and corrosion protection. With the prolongation of the use time, the alternation of cold and heat and microbial degradation will cause it to deteriorate and lose its original characteristics and effectiveness, so it needs to be replaced periodically, thereby continuously producing waste liquid that needs to be treated. [0003] The main components of the emulsion are base oil (mineral oil, vegetable oil and synthetic oil), fatty acid, surfactant (non-ionic and anionic), co-surfactant, anti-corrosion agent, bacteriostat and various additives. Due to different purposes, there are many types, and even for the same purpose, ...

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): C02F9/04C02F101/38C02F101/32
CPCC02F9/00C02F1/283C02F1/44C02F1/441C02F1/444C02F1/725C02F2101/32C02F2101/327C02F2101/38C02F2301/08
Inventor 叶圣武骆劲松蔡大牛刘航谢彬彬
Owner NANJING YUANQUAN TECH CO LTD
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