CN109626476A - A kind of universal defoaming agent of oil refining wastewater biochemical system and preparation method thereof - Google Patents
A kind of universal defoaming agent of oil refining wastewater biochemical system and preparation method thereof Download PDFInfo
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- CN109626476A CN109626476A CN201811626013.4A CN201811626013A CN109626476A CN 109626476 A CN109626476 A CN 109626476A CN 201811626013 A CN201811626013 A CN 201811626013A CN 109626476 A CN109626476 A CN 109626476A
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- modified
- wastewater
- polyether
- universal
- defoaming agent
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
- B01D19/02—Foam dispersion or prevention
- B01D19/04—Foam dispersion or prevention by addition of chemical substances
- B01D19/0404—Foam dispersion or prevention by addition of chemical substances characterised by the nature of the chemical substance
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
- B01D19/02—Foam dispersion or prevention
- B01D19/04—Foam dispersion or prevention by addition of chemical substances
- B01D19/0404—Foam dispersion or prevention by addition of chemical substances characterised by the nature of the chemical substance
- B01D19/0427—Foam dispersion or prevention by addition of chemical substances characterised by the nature of the chemical substance compounds containing halogen-atoms
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Dispersion Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Activated Sludge Processes (AREA)
Abstract
The invention discloses a kind of universal defoaming agents for Refining Chemical Industry biochemical treatment of wastewater, are grouped as by the group of following mass percentage: ten four carbon alcohols 5-10%, methanol 1-3%, polyether-modified object 10-30%, hydrochloric acid 1-3%, carboxymethyl-cellulose potassium salt 1-3%, surplus are deionized water；The modified polyether mixture is that high-carbon alkyl hydroxy propylene ether is polymer-modified: the mass ratio of alkyl carboxylic acid base modified polyether is 1:1-3.Universal defoaming agent of the present invention for Refining Chemical Industry biochemical treatment of wastewater uses nonionic and anionic compound co-mixing system, there is certain defoaming effect to the foaming cause in water quality various in oil refining wastewater source, can satisfy producer in sewerage and run defoaming demand when changing.Biological sludge death drop effect will not be brought to system simultaneously, the COD that will not be discharged to system is impacted.
Description
Technical field
The present invention relates to water treatment system defoaming agents, and in particular to one kind is applied under Refining Chemical Industry various wastewater water quality
Aerobic treatment system will not cause the environmentally friendly defoaming agent of additional pollution to water after processing.
Background technique
The oil refining wastewater of oil refining enterprise has the characteristics that high COD, high greasy dirt, the high phenol of high-sulfur, complicated and changeable, by a variety of sources
Sewage composition, comprising: refinery process unit sewerage, oil water separator draining, coking wastewater, desulfurization alkali residue waste liquid, crude oil
Storage tank draining, pump cooling water, process island ground flushing water, process unit area oil-containing rainwater, recirculated cooling water sewerage, RO system
It unites dense draining, boiler blowdown water, sanitary sewage etc..
Sewage with oil mainly from the tower of oil refining apparatus, tank, oil water separator, crude oil storage tank draining, pump cooling water etc.,
Main pollution sources, Zhan always drain in COD load 50% or so.Sewage sulfur-bearing containing phenol is mainly alkali cleaning removing sulfide etc.
The spent lye generated during impurity, can be divided into liquid hydrocarbon alkali residue, gasoline alkaline residue, diesel alkaline residue and ethylene alkaline residue, contain sulphur
Change a variety of toxic and harmful substances such as sodium, mercaptan, thioether, thiophenol, phenol, aphthenic acids and oils.Sulfur-containing waste water containing phenol accounts for refinery
The 1% of sewage total amount less than, but the discharge amount of the pollutants such as its sulfide, phenols and COD constitute oil plant gross contamination object row
30%-50% high-volume.
It substantially all can be using aerobic biochemical means as in reduction water in the refinery produced-water treatment project of China's oil refining industry
COD and other some of the contaminants process route in a ring.And aerobic sludge+life is used in this process route at present more
Object active filler increases flux aeration and is used as enhanced oxidation means, and gas-liquid interaction area is very big, if will produce without defoaming treatment
Raw a large amount of chemistry or bio foam, it is more prominent in seasonal variations and summer bubble-related issues.
The foam that aeration system generates can be by a variety of volatile severe toxicity such as sulfide contained in refinery sewage, phenol and acid
Chemical substance is taken out of, the working environment around serious pollution, and easily causes staff and sulfide poisoning harm, harm occurs
To the safety of staff's normal operation.And the foam generated can enter circulating pump and circulation line, generate cavitation erosion and air foam folder
Band reduces system circulation amount, hinders the normal aeration of system.Foam will lead to liquid level virtual height in unit simultaneously, keep liquid level aobvious
Existing deviation is shown, reduces and possesses water in actual cell, reduces practical zoneofoxidation volume.And in summer, the thickening of froth bed
The heat dissipation that water body can be significantly affected, causes water temperature to increase, so that biological sludge occurrence of large-area is dead, reduces COD removal
Efficiency.
Since Refining Chemical Industry biochemical treatment of wastewater has water inlet diversification and aerobic aerating system gas liquid interfacial area
Big feature.If necessary to cope with these characteristics and feature simultaneously, defoaming agent must have resistance to high conductance, resistance to high COD, inanimate object
The features such as toxicity works rapidly, efficient foam inhibition.
Summary of the invention
It is an object of the invention to have water inlet diversification and aerobic aeration according to Refining Chemical Industry biochemical treatment of wastewater
The big feature of system gas liquid interfacial area provides the resistance to high conductance of one kind, resistance to high COD, no biotoxicity, works rapidly, efficiently presses down
The universal defoaming agent of bubble, to cope with Refining Chemical Industry scene water quality situation complicated and changeable, it is ensured that biochemical system is intake at the scene
When change of water quality or biochemistry pool water quality big ups and downs, it can be ensured that the duration of defoaming agent performance avoids dedicated defoaming agent because of water
Failure, realizes the purpose of emergency flight control caused by qualitative changeization, and producer is easy to use preferably to control the normal of sewage disposal system
Operation.
Realizing technical solution used by above-mentioned purpose of the present invention is:
A kind of universal defoaming agent for Refining Chemical Industry biochemical treatment of wastewater, by the group of following mass percentage
Be grouped as: ten four carbon alcohols 5-10%, methanol 1-3%, polyether-modified object 10-30%, hydrochloric acid 1-3%, CMC1-3%, surplus is to go
Ionized water；
The modified polyether mixture is that high-carbon alkyl hydroxy propylene ether is polymer-modified: alkyl carboxylic acid base modified polyether
Mass ratio is 1:1-3.
The CMC is carboxymethyl-cellulose potassium salt.
The present invention also provides given a kind of above-mentioned universal defoaming agent for Refining Chemical Industry biochemical treatment of wastewater
Preparation method, comprising: polyether-modified object, CMC, ten four carbon alcohols are added by weight in a kettle and are warming up to after mixing evenly
60-70 DEG C of progress slaking reaction；Then it cools down, deionized water, hydrochloric acid, methanol is added while stirring, is led to after mixing evenly
With type anti-foam product.
In above-mentioned preparation method, curing temperature is preferably 65 DEG C, curing time 1-3h.
The invention has the following advantages: the universal defoaming for Refining Chemical Industry biochemical treatment of wastewater of invention
Agent uses nonionic and anionic compound co-mixing system, and increases the crosslinking degree between mixture with slaking reaction to improve
Defoaming activity object stability has certain defoaming effect, Neng Gouman to the foaming cause in water quality various in oil refining wastewater source
Sufficient producer runs defoaming demand when changing in sewerage.Simultaneously to the component of the preferred sludge small toxicity of active constituent, with
Ensure that the use of defoaming agent will not bring biological sludge death drop effect to system.Using nonionic and anion respectively to organic phase
With the close and distant property of inorganic phase, the surface tension of two-way increase substance solution is realized by compound synergic, and it is free to reduce foam surface
The purpose of energy improves powder performance, reduces usage amount, and so that it will not impact to the COD that system is discharged.
Specific embodiment:
Embodiment one: the universal defoaming agent for Refining Chemical Industry biochemical treatment of wastewater of the invention, by quality hundred
Divide than calculating, form as follows: ten four carbon alcohols 8%, methanol 2%, polyether-modified object 20%, hydrochloric acid 1%, CMC1%, surplus are
Deionized water.
Preparation process: being added polyether-modified object, CMC, ten four carbon alcohols by weight in a kettle, after mixing evenly, rises
Temperature is to 65 DEG C of progress slaking reactions, curing time 2h；It then cools to room temperature, deionized water, hydrochloric acid, first is added while stirring
Alcohol obtains universal anti-foam product after being kept stirring 30min.
Effect test citing:
Use three refinery factory scene biochemical treatment of wastewater water samples as test sample liquid, respectively A, B, C.Using straight
Diameter is 10cm, is highly test container for the quartz-glass cylinder of 45cm, tests basic liquid level in the position 15cm.Use thermostatted water
It is 35 degrees Celsius that bath, which keeps test fluid temperature,.Using the gas diffusion head of national standard GB12579-2002, existed with 2.5L/min rate
Test fluid bottom position blasts air.
It is not added under the blank control state of defoaming agent, the time that foam reaches 30cm height is respectively as follows:
Sample liquid A:6 seconds；Sample liquid B:4 seconds；Sample liquid C:8 seconds
After foam reaches 30cm height, defoaming agent is added by the concentration of 15mg/L, using lather collapse as foam time, with bubble
Foam went up to 25cm as the foam inhibition time.
The defoaming agent for taking three refinery factories respectively to use is as comparison medicament, respectively a, b, c.
Defoaming and foam inhibition time are as follows:
Defoaming agent of the present invention can be good at adapting to the sewage foaming situation in various water quality sources.
Claims (3)
1. a kind of universal defoaming agent for Refining Chemical Industry biochemical treatment of wastewater, by the component of following mass percentage
Composition: ten four carbon alcohols 5-10%, methanol 1-3%, polyether-modified object 10-30%, hydrochloric acid 1-3%, carboxymethyl-cellulose potassium salt 1-
3%, surplus is deionized water；
The modified polyether mixture is that high-carbon alkyl hydroxy propylene ether is polymer-modified: the quality of alkyl carboxylic acid base modified polyether
Than for 1:1-3.
2. the preparation side described in a kind of claim 1 for the universal defoaming agent of Refining Chemical Industry biochemical treatment of wastewater
Method, it is characterised in that: polyether-modified object, carboxymethyl-cellulose potassium salt, ten four carbon alcohols are added by weight in a kettle, stir
After uniformly, it is warming up to 60-70 DEG C of progress slaking reaction；Then it cools down, deionized water, hydrochloric acid, methanol, stirring is added while stirring
Universal anti-foam product is obtained after uniformly.
3. preparation method as claimed in claim 2, which is characterized in that the curing time is 1-3h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811626013.4A CN109626476A (en) | 2018-12-28 | 2018-12-28 | A kind of universal defoaming agent of oil refining wastewater biochemical system and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811626013.4A CN109626476A (en) | 2018-12-28 | 2018-12-28 | A kind of universal defoaming agent of oil refining wastewater biochemical system and preparation method thereof |
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| CN109626476A true CN109626476A (en) | 2019-04-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110935201A (en) * | 2019-12-27 | 2020-03-31 | 中海油天津化工研究设计院有限公司 | Defoaming agent for MVR evaporation system and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19837195A1 (en) * | 1998-08-17 | 2000-02-24 | Cognis Deutschland Gmbh | Producing defoaming granulate, for solid detergent, by spraying aqueous silicone emulsion onto pre-product mixture, while drying and granulating |
| CN107651721A (en) * | 2017-11-01 | 2018-02-02 | 中海油天津化工研究设计院有限公司 | A kind of nontoxic defoamer for refinery alkaline sewage and preparation method thereof |
-
2018
- 2018-12-28 CN CN201811626013.4A patent/CN109626476A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19837195A1 (en) * | 1998-08-17 | 2000-02-24 | Cognis Deutschland Gmbh | Producing defoaming granulate, for solid detergent, by spraying aqueous silicone emulsion onto pre-product mixture, while drying and granulating |
| CN107651721A (en) * | 2017-11-01 | 2018-02-02 | 中海油天津化工研究设计院有限公司 | A kind of nontoxic defoamer for refinery alkaline sewage and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110935201A (en) * | 2019-12-27 | 2020-03-31 | 中海油天津化工研究设计院有限公司 | Defoaming agent for MVR evaporation system and preparation method thereof |
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