CN106348530A - Treatment method for glycerine concentrated sewage of stearic acid production - Google Patents
Treatment method for glycerine concentrated sewage of stearic acid production Download PDFInfo
- Publication number
- CN106348530A CN106348530A CN201610878610.0A CN201610878610A CN106348530A CN 106348530 A CN106348530 A CN 106348530A CN 201610878610 A CN201610878610 A CN 201610878610A CN 106348530 A CN106348530 A CN 106348530A
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- CN
- China
- Prior art keywords
- water
- outfan
- input
- stearic acid
- glycerol
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/36—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
Abstract
The invention relates to a treatment method for glycerine concentrated sewage of stearic acid production. The treatment method is aimed at the glycerine concentrated sewage of industrial stearic acid production. The glycerine concentrated sewage in a raw water collection tank sequentially flows through an MBR (Membrane Bioreactor) filtering system, a primary RO (Reverse Osmosis) treatment system and a secondary RO treatment system, a concentrated water output end of the MBR filtering system is connected with an input end of a biochemical treatment system, a plain water output end of the MBR filtering system is connected with an input end of the primary RO treatment system, a concentrated water output end of the primary RO treatment system is connected with an input end of the secondary RO treatment system, and a plain water output end of the secondary RO treatment system is connected with the input end of the primary RO treatment system. The treatment method has the beneficial effects that the water quality of produced water is good, the production process is stable, the treatment cost is low, and the treatment method is environmentally friendly.
Description
Technical field
The present invention relates to glycerol concentrates the processing method of lower water in a kind of stearic acid production.
Background technology
Stearic acid (octadecanoid acid, c18h36o2) it is a kind of important change raw material during modern industry produces, it is widely used in
Plastics, the synthesis of rubber and the production of processing and stearate, have in industrial circles such as detergents and cosmetic, coating, oilfield chemistries
Important purposes.As a kind of senior satisfied fatty acid, stearic acid generally with oils and fatss as raw material, through hydrolysis, distillation/rectification and
The links such as hydrogenation produce and obtain.In stearic production process, during grease hydrolysis, the glycerol of by-product can form dilute glycerol liquor
Solution.Because material characteristic and product quality require, higher temperature (glycerol thickening temperature generally need to be controlled under vacuum
239 DEG C) glycerol liquor is concentrated, to meet product quality requirement.Stearic acid produce in glycerol concentrate lower water essentially from
What glycerol liquor evaporating concentration process discharged steams water-setting liquid, and has a small amount of steam adjoining pipe lime set.Have due in vacuum production process
The impact of machine component relative volatility and the presence of effumability organic component, in the evaporating waste water producing in glycerol concentration process
Certain organic component can be contained, its cod value may be up to more than 8000mg/l, apparent for vaporific nebulousurine liquid, have abnormal flavour.
China's environment in recent years problem is increasingly prominent, and water pollution is not yet effectively controlled.Because glycerol concentrates in lower water
Organic component as activated sludge nutrient source is relatively single, the less stable of routine biochemistry treatment effect, and producing water can occur
Larger fluctuation is it is impossible to reach discharge standard.In current biochemical treatment facility, glycerol concentrates waste water and processes through anaerobism, oxygen consumption
Afterwards although water outlet cod value is minimum is down to below 200mg/l, but cod value often occurs to continue exceeded (> 500mg/l), and consume
Sludge bulking phenomenon occurs in oxygen processing pond, sewage can not discharge.And deliver external coordination processed in units, due to sewage band mud, external coordination
Unit is rejected, and has had a strong impact on the normal production run of enterprise.Additionally, summer environment temperature raises the foreign odor that also can aggravate sewage
Taste, affects plant environment.Therefore, under during stearic acid produces, glycerol concentrates, the effective process of water is provided with importance and urgency,
Even sewage disposal has become the critical bottleneck that impact enterprise produces.It is subject to extensively and closely closing of society in current environmental issue
In the case of note, during effectively and stably process stearic acid produces, glycerol concentrates lower water becomes the extremely urgent of enterprise's needs solution
Major issue.
Improvement cost and operating cost will be led to drastically to increase using rectification separating technology, and use extraction process then also
New pollutant are led to introduce.The adsorbents such as activated carbon, molecular sieve have good adsorption to stearic acid and oils and fatss, but no
The stronger pollutant of water solublity such as method removing glycerol.Due to the restriction of filtering accuracy, the Organic substance of the dissolved cannot be by routine
Plate-and-frame filtration removing, and directly employing can retain the membrane separation plant of molecule, due to containing stearic acid and oils and fatss in waste water
Deng composition, the solidification oil reservoir/block of accumulation can form compressible polluted reservoir on film surface, leads to the rapid decay of membrane flux,
And this not only can increase the load of equipment, result even in the infeasible of process.
Under the existing condition of production, realize glycerol stearate and concentrate rationally effectively administering of lower water, become enterprise and urgently tie
A problem certainly.
Content of the invention
The technical problem to be solved in the present invention is: based on the problems referred to above, the present invention provides glycerol in a kind of stearic acid production
Concentrate the processing method of lower water.
The technical scheme that the present invention solves that its technical problem adopted is: a kind of stearic acid produce under glycerol concentrates
The processing method of water, in producing for industrial stearic acid, glycerol concentrates lower water, and the glycerol in raw water collection pond concentrates lower water successively
Flow through mbr filtration system, one-level ro processing system and two grades of ro processing systems, the concentrated water outfan of mbr filtration system is connected with
The input of biochemical treatment system, the fresh water outfan of mbr filtration system is connected with the input of one-level ro processing system, one-level
The concentrated water outfan of ro processing system is connected with the input of two grades of ro processing systems, the fresh water outfan of two grades of ro processing systems
It is connected with the input of one-level ro processing system.
Further, it is provided with sand filter between the input of the outfan in raw water collection pond and mbr filtration system.
Further, in being connected with turn between the input of the outfan of mbr filtration system and one-level ro processing system
Between water tank and carbon filter fine filter, the fresh water outfan of mbr filtration system is connected with the input of intermediate water tank, carbon filter fine filter
Outfan is connected with the input of one-level ro processing system, the fresh water outfan of two grades of ro processing systems and the input of intermediate water tank
End connects.
Further, the outfan of biochemical treatment system is connected with the input in raw water collection pond.
Further, it is connected with turn between the fresh water outfan of one-level ro processing system and the input in raw water collection pond
Reuse water tank and recirculating cooling water system, the fresh water outfan of one-level ro processing system is connected with the input of reuse water tank, follows
The outfan of ring cooling water system is connected with the input in raw water collection pond.
Further, the organic component in the concentrated water outfan of two grades of ro processing systems reclaims glycerol or burning disposal.
Further, biochemical treatment system includes anaerobic treatment and oxygen consumption is processed, at one-level ro processing system and two grades of ro
Reason system is reverse osmosis membrane filtration system.
The invention has the beneficial effects as follows: (1) producing water water quality is good: cod value is low, electrical conductivity is low, achromaticity and clarification, and index of correlation is full
Sufficient gb8978-1996 Standard, it is contemplated that reuse, reuse to stearic acid production station or can do recirculated cooling water；(2) produce
Process stabilization: process control, equipment operation are stable；(3) processing cost is low: compared with existing biochemical system, processes consubstantiality contamination
Water, while improving treatment effect, can reduce the correlative charges such as manpower, energy consumption, place, at single treatment rough estimate ton sewage
Not higher than 5 yuan of reason expense；(4) environmental protection: recyclable dense Organic substance in water and product water, and avoid follow-up biogas, foul gass
The loaded down with trivial details problem such as process, concentrated water can remove hydrolyzing process, return glycerol evaporation concentration system.
Brief description
The present invention is further described below in conjunction with the accompanying drawings.
Fig. 1 is the structural representation of the present invention；
Wherein: 1. raw water collection pond, 2.mbr filtration system, 3. one-level ro processing system, 4. two grades of ro processing systems, 5.
Biochemical treatment system, 6. sand filter, 7. intermediate water tank, 8. carbon filter fine filter, 9. reuse water tank, 10. recirculating cooling water system.
Specific embodiment
Presently in connection with specific embodiment, the invention will be further described, and following examples are intended to illustrate rather than
Limitation of the invention further.
In a kind of stearic acid production, glycerol concentrates the processing method of lower water, under in producing for industrial stearic acid, glycerol concentrates
Water, the glycerol in raw water collection pond 1 concentrates lower water and flows through successively at mbr filtration system 2, one-level ro processing system 3 and two grades of ro
Reason system 4, the concentrated water outfan of mbr filtration system 2 is connected with the input of biochemical treatment system 5, mbr filtration system 2 light
Water outfan is connected with the input of one-level ro processing system 3, the concentrated water outfan of one-level ro processing system 3 and two grades of ro process
The input of system 4 connects, and the fresh water outfan of two grades of ro processing systems 4 is connected with the input of one-level ro processing system 3.
It is provided with sand filter 6 between the input of the outfan in raw water collection pond 1 and mbr filtration system 2.
It is connected with intermediate water tank 7 in turn between the input of the outfan of mbr filtration system 2 and one-level ro processing system 3
Filter fine filter 8 with carbon, the fresh water outfan of mbr filtration system 2 is connected with the input of intermediate water tank 7, carbon filters the defeated of fine filter 8
Go out end to be connected with the input of one-level ro processing system 3, the fresh water outfan of two grades of ro processing systems 4 is defeated with intermediate water tank 7
Enter end to connect.
The outfan of biochemical treatment system 5 is connected with the input in raw water collection pond 1.
It is connected with recycle-water in turn between the fresh water outfan of one-level ro processing system 3 and the input in raw water collection pond 1
Case 9 and recirculating cooling water system 10, the fresh water outfan of one-level ro processing system 3 is connected with the input of reuse water tank 9, circulation
The outfan of cooling water system 10 is connected with the input in raw water collection pond 1.
Organic component in the concentrated water outfan of two grades of ro processing systems 4 reclaims glycerol or burning disposal.
Biochemical treatment system 5 includes anaerobic treatment and oxygen consumption process, one-level ro processing system 3 and two grades of ro processing systems 4
It is reverse osmosis membrane filtration.
In being produced using above-mentioned stearic acid, glycerol concentrates concretely comprising the following steps of the processing method of lower water:
During step 1, stearic acid produce, glycerol concentrates in lower water entrance raw water collection pond, sends into useless to reduce in sand filter
After water turbidity, it is re-fed in mbr filtration system carrying out filtration separation, the concentrated water of outfan and the ratio of fresh water are 1:4.
Step 2, the concentrated water after mbr filtration system separates enter biochemical treatment system, and stearic acid, oils and fatss etc. are heterogeneous
The half cycle system interior circulation in mbr filtration system and with biochemical treatment formation for the pollutant such as Organic substance and dust, can be biochemical
System is degraded；Fresh water flows to after sending into after intermediate water tank is stored in carbon filter fine filter and is passed through two-stage membrane filtration system.
Step 3, in one-level ro processing system, the concentrated water of outfan and fresh water ratio are 1:3, and concentrated water enters at two grades of ro
Reason system；In two grades of ro processing systems, the concentrated water of outfan and fresh water ratio are 1:1, and the organic component in concentrated water reclaims glycerol
Or burning disposal, fresh water flows to intermediate water tank and continues cycling through.Ro processing system is both needed to add antisludging agent, and periodically adds cleaning
Agent.
The fresh water isolated in step 4, one-level ro processing system enters reuse water tank, can be used as circulating cooling system and supplies
Water, wherein be can be used for production link or recirculated water by evaporation water outlet, plays dilution dense in remaining part water feeding raw water collection pond
Contracting is lower to be acted on.
The predominantly organic composition that glycerol concentrates in lower water is glycerol, stearic acid and micro oils and fatss, processes with ro membrance concentration
The carrying out of process, the organic concentration retaining liquid side gradually increases.Although stearic acid and oils and fatss are insoluble in water, due to can be with water
The presence of the glycerol dissolving each other, in handling process of the present invention, stearic acid and oils and fatss can be dissolved in glycerol liquor, and this avoids Hard Fat
Acid/oils and fatss in the processing procedure of ro processing system as heterogeneous materials separate out, thus alleviate film surface pollution so that
Processing procedure can be smoothed out.
Compared with former handling process, the inventive method have produce that water quality is good, that biochemical treatment sewage volume total amount is few is bright
Aobvious advantage is it is achieved that glycerol concentrates the recycling treatment of lower water.Under current water process present situation, such as need to launch present invention work,
Related experiment work can deeply be carried out.
With the above-mentioned desirable embodiment according to the present invention for enlightenment, by above-mentioned description, relevant staff is complete
Entirely various change and modification can be carried out in the range of without departing from this invention technological thought.The technology of this invention
The content that property scope is not limited in description it is necessary to determine its technical scope according to right.
Claims (7)
1. during a kind of stearic acid produces, glycerol concentrates the processing method of lower water, under in producing for industrial stearic acid, glycerol concentrates
Water, is characterized in that: the glycerol in raw water collection pond concentrates lower water and flows through mbr filtration system, one-level ro processing system and two successively
Level ro processing system, the concentrated water outfan of mbr filtration system is connected with the input of biochemical treatment system, mbr filtration system
Fresh water outfan is connected with the input of one-level ro processing system, the concentrated water outfan of one-level ro processing system and two grades of ro process
The input of system connects, and the fresh water outfan of two grades of ro processing systems is connected with the input of one-level ro processing system.
2. during a kind of stearic acid according to claim 1 produces, glycerol concentrates the processing method of lower water, it is characterized in that: described
The outfan in raw water collection pond and the input of mbr filtration system between be provided with sand filter.
3. during a kind of stearic acid according to claim 1 produces, glycerol concentrates the processing method of lower water, it is characterized in that: described
The outfan of mbr filtration system and the input of one-level ro processing system between be connected with turn intermediate water tank and carbon filter fine straining
Device, the fresh water outfan of mbr filtration system is connected with the input of intermediate water tank, and carbon is filtered at outfan and one-level ro of fine filter
The input of reason system connects, and the fresh water outfan of two grades of ro processing systems is connected with the input of intermediate water tank.
4. during a kind of stearic acid according to claim 1 produces, glycerol concentrates the processing method of lower water, it is characterized in that: described
The outfan of biochemical treatment system be connected with the input in raw water collection pond.
5. during a kind of stearic acid according to claim 1 produces, glycerol concentrates the processing method of lower water, it is characterized in that: described
The fresh water outfan of one-level ro processing system and the input in raw water collection pond between be connected with reuse water tank and circulation in turn
Cooling water system, the fresh water outfan of one-level ro processing system is connected with the input of reuse water tank, recirculating cooling water system
Outfan is connected with the input in raw water collection pond.
6. during a kind of stearic acid according to claim 1 produces, glycerol concentrates the processing method of lower water, it is characterized in that: described
The concentrated water outfan of two grades of ro processing systems in organic component reclaim glycerol or burning disposal.
7. during a kind of stearic acid according to claim 1 produces, glycerol concentrates the processing method of lower water, it is characterized in that: described
Biochemical treatment system include anaerobic treatment and oxygen consumption and process, one-level ro processing system and two grades of ro processing systems are reverse osmosiss
Membrane filtration system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610878610.0A CN106348530A (en) | 2016-09-30 | 2016-09-30 | Treatment method for glycerine concentrated sewage of stearic acid production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610878610.0A CN106348530A (en) | 2016-09-30 | 2016-09-30 | Treatment method for glycerine concentrated sewage of stearic acid production |
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| CN106348530A true CN106348530A (en) | 2017-01-25 |
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| CN201610878610.0A Pending CN106348530A (en) | 2016-09-30 | 2016-09-30 | Treatment method for glycerine concentrated sewage of stearic acid production |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101402509A (en) * | 2008-11-21 | 2009-04-08 | 北京桑德环境工程有限公司 | Treatment system and method for high-salt wastewater |
| CN201309875Y (en) * | 2008-12-08 | 2009-09-16 | 核工业理化工程研究院华核新技术开发公司 | Recycling device of biological pharmaceutical wastewater |
| CN101792216A (en) * | 2010-02-09 | 2010-08-04 | 丁国良 | Resource recycling method of glyphosate mother liquor |
| CN202152307U (en) * | 2011-05-12 | 2012-02-29 | 北京美能环保科技有限公司 | Immersed type membrane bioreactor |
| CN104230083A (en) * | 2014-08-21 | 2014-12-24 | 波鹰(厦门)科技有限公司 | Method for recovering sodium chloride and glycerol from high-salt glycerol-containing high-depth organic wastewater |
| CN105417835A (en) * | 2014-09-12 | 2016-03-23 | 深圳市嘉泉膜滤设备有限公司 | Sewage treatment and seawater desalination process method |
| CN105859019A (en) * | 2016-03-22 | 2016-08-17 | 中国环境科学研究院 | Treating and recycling method and apparatus for organic wastewater |
-
2016
- 2016-09-30 CN CN201610878610.0A patent/CN106348530A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101402509A (en) * | 2008-11-21 | 2009-04-08 | 北京桑德环境工程有限公司 | Treatment system and method for high-salt wastewater |
| CN201309875Y (en) * | 2008-12-08 | 2009-09-16 | 核工业理化工程研究院华核新技术开发公司 | Recycling device of biological pharmaceutical wastewater |
| CN101792216A (en) * | 2010-02-09 | 2010-08-04 | 丁国良 | Resource recycling method of glyphosate mother liquor |
| CN202152307U (en) * | 2011-05-12 | 2012-02-29 | 北京美能环保科技有限公司 | Immersed type membrane bioreactor |
| CN104230083A (en) * | 2014-08-21 | 2014-12-24 | 波鹰(厦门)科技有限公司 | Method for recovering sodium chloride and glycerol from high-salt glycerol-containing high-depth organic wastewater |
| CN105417835A (en) * | 2014-09-12 | 2016-03-23 | 深圳市嘉泉膜滤设备有限公司 | Sewage treatment and seawater desalination process method |
| CN105859019A (en) * | 2016-03-22 | 2016-08-17 | 中国环境科学研究院 | Treating and recycling method and apparatus for organic wastewater |
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