CN104445549A - Treatment method for backwash liquid of ceramic microfiltration membrane for low-temperature purification of combined-soda II solution - Google Patents
Treatment method for backwash liquid of ceramic microfiltration membrane for low-temperature purification of combined-soda II solution Download PDFInfo
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- CN104445549A CN104445549A CN201410636127.2A CN201410636127A CN104445549A CN 104445549 A CN104445549 A CN 104445549A CN 201410636127 A CN201410636127 A CN 201410636127A CN 104445549 A CN104445549 A CN 104445549A
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- backwash
- liquid
- water
- liquid waste
- microfiltration membrane
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/16—Halides of ammonium
- C01C1/164—Ammonium chloride
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Inorganic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a treatment method for a backwash liquid of a ceramic microfiltration membrane for low-temperature purification of a combined-soda II solution. The treatment method comprises the following step: sending backwash waste liquid produced by insoluble matters adhered on a backwash ceramic microfiltration membrane component into a mixing thickener for an ammonium making process step in a combined-soda production process, wherein the water-insoluble matters in the backwash waste liquid are settled to form thick matters after thickening for preparing agricultural ammonium chloride, the water-insoluble matters are discharged out of a production system along with finished agricultural ammonium chloride, and clear liquid in the backwash waste liquid is returned into a mother solution system in the combined-soda production process along with overflow liquid of the mixing thickener. The treatment method disclosed by the invention has the following advantages: as the content of calcium and magnesium in agricultural ammonium does not affect the use of agricultural ammonium as a fertilizer, the backwash waste liquid flows into the mixing thickener, the thick matters are returned into the ammonium making process step, the water-insoluble matters intercepted by the ceramic microfiltration membrane component are discharged out of the production system along with product agricultural ammonium, and the clear liquid is returned into the mother solution system along with the overflow liquid, thereby realizing recycling of heat AI, and simultaneously realizing zero emission of waste liquid and solid wastes.
Description
Technical field
The present invention relates to membrane separation technique and field of inorganic chemical engineering, the invention particularly relates to when with water-insolubles such as calcium, magnesium, silts in female II liquid of ceramic microfiltration membrane removal connection alkali, after carrying out backwash with hot A I pair of film, the treatment process of backwash liquid waste.
Background technology
Compared with traditional separation method, some row advantages such as membrane sepn has reduced investment, simple to operate, energy consumption is low, corrosion-resistant, turndown ratio is large.At present, existing people studied the method with the water-insoluble such as calcium, magnesium, silt in the technical filter connection alkali mother II of membrane sepn successively, and obtained certain progress.But in these researchs, the acid solution of multiplex certain pH value carries out backwash to film, though good backwash effect can be obtained, but backwash liquor need be prepared separately, and after backwash liquor inflow system, destroy mother liquor balance, in addition, acid backwash liquor requires also higher to the pipeline of junctional membrane assembly, the material of valve.
When carrying out with female II liquid of the technology distich alkali of membrane sepn the water-insoluble such as calcium, magnesium, silt purifying to remove wherein, need regularly carry out backwash to film, and backwash liquid waste how to process be a great problem always.Conventional way carries out solid-liquid separation by the mode of cylinder press filtration to backwash liquid waste, and filtrate returns connection alkali system, and solid waste is otherwise processed then.This method, not only can produce a large amount of solid waste, brings huge environmental protection pressure, increases processing cost, and inevitably causes the loss of backwash liquor, along with accumulated time, finally can destroy the mother liquor balance of connection alkali system.
Summary of the invention
The object of the invention is to the shortcoming overcoming prior art, a kind of recycle that can not only realize backwash liquor is provided, and do not affect the mother liquor balance of connection alkali system, the treatment process of the backwash liquor of the ceramic microfiltration membrane of female II liquid of backwash purification connection alkali of the zero release of waste liquid and solid waste can also be realized in addition.
The present invention seeks to be achieved through the following technical solutions.
The treatment process of female II liquid of low temperature purification connection alkali ceramic microfiltration membrane backwash liquor used, it comprises the following steps:
The backwash liquid waste produced by attachment insolubles on backwash ceramic micro filter membrane module sends into the mixing thickener of the ammonium operation processed in connection alkali production process, the sedimentation after stiff of water-insoluble in backwash liquid waste is that stiff thing is for the preparation of agriculture ammonium chloride, take production system out of with finished product agricultural ammonium chloride, the clear liquid in backwash liquid waste returns with the overflowing liquid of mixing thickener the mother liquor system joined in alkali production process; The water-insoluble comprising calcium, magnesium, silt that attachment insolubles on described ceramic micro filter membrane module produces when being and filtering heat exchange, suction ammonia father's former wife's II liquid, described backwash liquid waste is the backwash liquid waste carrying out back flushing generation with the hot A I pair of ceramic micro filter membrane module in connection alkali production process.
The present invention has the following advantages: because in agriculture ammonium, the height of content of calcium and magnesium does not affect it as Fertilizer application, backwash liquid waste is flowed into mixing thickener, stiff thing returns ammonium operation processed, the water-insoluble that ceramic micro filter membrane module is retained down takes production system out of with product agriculture ammonium, clear liquid returns mother liquor system with overflowing liquid, thus realize the recycle of hot A I, also achieve the zero release of waste liquid and solid waste simultaneously.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in detail.
The treatment process of female II liquid of low temperature purification connection alkali of the present invention ceramic microfiltration membrane backwash liquor used, it comprises the following steps: the backwash liquid waste produced by the attachment insolubles on backwash ceramic micro filter membrane module sends into the mixing thickener of the ammonium operation processed in connection alkali production process, the sedimentation after stiff of water-insoluble in backwash liquid waste is that stiff thing is for the preparation of agriculture ammonium chloride, take production system out of with finished product agricultural ammonium chloride, the clear liquid in backwash liquid waste returns with the overflowing liquid of mixing thickener the mother liquor system joined in alkali production process; The water-insoluble comprising calcium, magnesium, silt that attachment insolubles on described ceramic micro filter membrane module produces when being and filtering heat exchange, suction ammonia father's former wife's II liquid, described backwash liquid waste is the backwash liquid waste carrying out back flushing generation with the hot A I pair of ceramic micro filter membrane module in connection alkali production process.
Water-insoluble in backwash liquid waste takes production system through stiff out of with product agricultural ammonium chloride in mixing thickener.The zero release of solid waste can be realized like this, alleviate environmental protection pressure, save processing cost, and the water-insoluble such as calcium, magnesium is transferred in agriculture ammonium chloride not affect it as Fertilizer application.
Clear liquid in backwash liquid waste returns with the overflowing liquid of mixing thickener the mother liquor system joined in alkali production process.The hot recycle of A I and the zero release of waste liquid can be realized like this, maintain the mother liquor balance of system, thus alleviate environmental protection pressure, reduce costs.
Embodiment 1
With mother II liquid in ceramic micro filter membrane filtration connection alkali production process, when flux depression to stationary value 50% time, backwash is carried out with the hot A I pair of ceramic micro filter membrane module in connection alkali production process, backwash liquid waste sends into the mixing thickener of the ammonium operation processed in connection alkali production process, the sedimentation after stiff of water-insoluble in backwash liquid waste is that stiff thing is for the preparation of agriculture ammonium chloride, take production system out of with finished product agricultural ammonium chloride, the clear liquid in backwash liquid waste returns with the overflowing liquid of mixing thickener the mother liquor system joined in alkali production process.The water-insoluble comprising calcium, magnesium, silt that attachment insolubles on described ceramic micro filter membrane module produces when being and filtering heat exchange, suction ammonia father's former wife's II liquid, described backwash liquid waste is the backwash liquid waste carrying out back flushing generation with the hot A I pair of ceramic micro filter membrane module in connection alkali production process.
After tested: backwash liquid waste is after the inventive method process, and the content of calcium and magnesium in product agricultural ammonium chloride changes to 0.46%, 0.27% by 0.35%, 0.18% respectively; Mixing thickener overflow liquid calcium, magnesium density and turbidity change to 76.8mg/L, 37.6mg/L, 156.8NTU by 76.8mg/L, 37.5mg/L, 156.7NTU respectively, substantially constant.Illustrate that the water-insoluble in backwash liquid waste has been transferred in product agricultural ammonium chloride.
Claims (1)
1. the treatment process of female II liquid of low temperature purification connection alkali ceramic microfiltration membrane backwash liquor used, is characterized in that it comprises the following steps:
The backwash liquid waste produced by attachment insolubles on backwash ceramic micro filter membrane module sends into the mixing thickener of the ammonium operation processed in connection alkali production process, the sedimentation after stiff of water-insoluble in backwash liquid waste is that stiff thing is for the preparation of agriculture ammonium chloride, take production system out of with finished product agricultural ammonium chloride, the clear liquid in backwash liquid waste returns with the overflowing liquid of mixing thickener the mother liquor system joined in alkali production process; The water-insoluble comprising calcium, magnesium, silt that attachment insolubles on described ceramic micro filter membrane module produces when being and filtering heat exchange, suction ammonia father's former wife's II liquid, described backwash liquid waste is the backwash liquid waste carrying out back flushing generation with the hot A I pair of ceramic micro filter membrane module in connection alkali production process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410636127.2A CN104445549B (en) | 2014-11-12 | 2014-11-12 | The treatment process of the female II liquid ceramic microfiltration membrane backwash liquid used of low temperature purification connection alkali |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410636127.2A CN104445549B (en) | 2014-11-12 | 2014-11-12 | The treatment process of the female II liquid ceramic microfiltration membrane backwash liquid used of low temperature purification connection alkali |
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| Publication Number | Publication Date |
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| CN104445549A true CN104445549A (en) | 2015-03-25 |
| CN104445549B CN104445549B (en) | 2016-06-15 |
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| CN201410636127.2A Active CN104445549B (en) | 2014-11-12 | 2014-11-12 | The treatment process of the female II liquid ceramic microfiltration membrane backwash liquid used of low temperature purification connection alkali |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06121981A (en) * | 1992-10-08 | 1994-05-06 | Oriental Yeast Co Ltd | Treatment of waste liquid from production process of sucrose |
| CN101219797A (en) * | 2008-01-28 | 2008-07-16 | 王晓璐 | Method for separatingcalcium chloride and sodium chloride in ammonia distillation waste clear solution with nanofiltration technology and application of production by the method |
| CN103523802A (en) * | 2013-07-16 | 2014-01-22 | 天津滨瀚环保科技发展有限公司 | Purification method for preparing alkali mother liquor II by employing combined soda process |
-
2014
- 2014-11-12 CN CN201410636127.2A patent/CN104445549B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06121981A (en) * | 1992-10-08 | 1994-05-06 | Oriental Yeast Co Ltd | Treatment of waste liquid from production process of sucrose |
| CN101219797A (en) * | 2008-01-28 | 2008-07-16 | 王晓璐 | Method for separatingcalcium chloride and sodium chloride in ammonia distillation waste clear solution with nanofiltration technology and application of production by the method |
| CN103523802A (en) * | 2013-07-16 | 2014-01-22 | 天津滨瀚环保科技发展有限公司 | Purification method for preparing alkali mother liquor II by employing combined soda process |
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| CN104445549B (en) | 2016-06-15 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Treatment method for backwash liquid of ceramic microfiltration membrane for low-temperature purification of combined-soda II solution Effective date of registration: 20161213 Granted publication date: 20160615 Pledgee: TIANJIN BOHAI CHEMICAL INDUSTRY GROUP CO., LTD. Pledgor: Bo Huayongli chemical inc, Tianjin Registration number: 2016120000071 |
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Date of cancellation: 20180503 Granted publication date: 20160615 Pledgee: TIANJIN BOHAI CHEMICAL INDUSTRY GROUP CO., LTD. Pledgor: Bo Huayongli chemical inc, Tianjin Registration number: 2016120000071 |
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