CN104445549B - The treatment process of the female II liquid ceramic microfiltration membrane backwash liquid used of low temperature purification connection alkali - Google Patents
The treatment process of the female II liquid ceramic microfiltration membrane backwash liquid used of low temperature purification connection alkali Download PDFInfo
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- CN104445549B CN104445549B CN201410636127.2A CN201410636127A CN104445549B CN 104445549 B CN104445549 B CN 104445549B CN 201410636127 A CN201410636127 A CN 201410636127A CN 104445549 B CN104445549 B CN 104445549B
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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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- 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 present invention discloses the treatment process of the low temperature purification female II liquid ceramic microfiltration membrane backwash liquid used of connection alkali, 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 stiff device 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 agricultural ammonium chloride, taking production system out of with finished product agricultural ammonium chloride, the clear liquid in backwash liquid waste returns the mother liquor system in connection alkali production process with the overflowing liquid of mixing stiff device. 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 stiff device, 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.
Description
Technical field
The present invention relates to membrane separation technique and field of inorganic chemical engineering, the present invention particularly relates to when with water-insolubles such as calcium, magnesium, silts in ceramic microfiltration membrane removal female II liquid of connection alkali, after film being carried out backwash with hot A I, and the treatment process of backwash liquid waste.
Background technology
Compared with traditional separation method, membrane sepn has some row advantages such as investment economizes, simple to operate, energy consumption is low, corrosion-resistant, turndown ratio is big. At present, existing people studied the method with water-insolubles such as the calcium in the technical filter connection alkali mother II of membrane sepn, magnesium, silts successively, and obtained certain progress. But in these researchs, film is carried out backwash by the acid solution of multiplex certain pH value, though good backwash effect can be obtained, but backwash liquid need to be prepared separately, and after backwash liquid inflow system, destroying mother liquor balance, in addition, the pipeline of connection membrane module, the material of valve are required also higher by acid backwash liquid.
When carrying out purifying removing the water-insolubles such as calcium wherein, magnesium, silt with female II liquid of the technology distich alkali of membrane sepn, need regularly be carried out by film backwash, and backwash liquid waste how to process be a big difficult problem always. Conventional way is that backwash liquid waste is carried out solid-liquid separation by the mode with cylinder press filtration, and filtrate returns connection alkali system, and solid waste is otherwise processed then. This kind of method, not only can produce a large amount of solid waste, bring huge environmental protection pressure, increases processing cost, and unavoidably causes the loss of backwash liquid, along with accumulated time, finally can destroy the mother liquor balance of connection alkali system.
Summary of the invention
It is an object of the invention to overcome the shortcoming of prior art, a kind of recycle that can not only realize backwash liquid is provided, and do not affect the mother liquor balance of connection alkali system, the treatment process of the backwash liquid of the ceramic microfiltration membrane of backwash purification female II liquid of 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 the female II liquid ceramic microfiltration membrane backwash liquid used of low temperature purification connection alkali, it comprises the following steps:
The backwash liquid waste produced by attachment insolubles on backwash ceramic micro filter membrane module sends into the mixing stiff device 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 agricultural ammonium chloride, taking production system out of with finished product agricultural ammonium chloride, the clear liquid in backwash liquid waste returns the mother liquor system in connection alkali production process with the overflowing liquid of mixing stiff device; The water-insoluble comprising calcium, magnesium, silt that the described attachment insolubles on ceramic micro filter membrane module produces when being and filter heat exchange, suction ammonia father's former wife's II liquid, described backwash liquid waste is the backwash liquid waste that ceramic micro filter membrane module carries out back flushing generation with the hot A I 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 stiff device, 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 the low temperature purification female II liquid ceramic microfiltration membrane backwash liquid used of connection alkali of the present invention, 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 stiff device 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 agricultural ammonium chloride, taking production system out of with finished product agricultural ammonium chloride, the clear liquid in backwash liquid waste returns the mother liquor system in connection alkali production process with the overflowing liquid of mixing stiff device; The water-insoluble comprising calcium, magnesium, silt that the described attachment insolubles on ceramic micro filter membrane module produces when being and filter heat exchange, suction ammonia father's former wife's II liquid, described backwash liquid waste is the backwash liquid waste that ceramic micro filter membrane module carries out back flushing generation with the hot A I 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 stiff device. 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 agricultural ammonium chloride does not affect it as Fertilizer application.
Clear liquid in backwash liquid waste returns the mother liquor system in connection alkali production process with the overflowing liquid of mixing stiff device. 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
Mother II liquid in alkali production process is joined with ceramic micro filter membrane filtration, when flux depression to stationary value 50% time, with the hot A I in connection alkali production process, ceramic micro filter membrane module is carried out backwash, backwash liquid waste sends into the mixing stiff device 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 agricultural ammonium chloride, taking production system out of with finished product agricultural ammonium chloride, the clear liquid in backwash liquid waste returns the mother liquor system in connection alkali production process with the overflowing liquid of mixing stiff device.The water-insoluble comprising calcium, magnesium, silt that the described attachment insolubles on ceramic micro filter membrane module produces when being and filter heat exchange, suction ammonia father's former wife's II liquid, described backwash liquid waste is the backwash liquid waste that ceramic micro filter membrane module carries out back flushing generation with the hot A I in connection alkali production process.
After tested: backwash liquid waste is after the inventive method processes, 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 stiff device 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 the female II liquid ceramic microfiltration membrane backwash liquid used of low temperature purification connection alkali, it is characterised 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 stiff device 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 agricultural ammonium chloride, taking production system out of with finished product agricultural ammonium chloride, the clear liquid in backwash liquid waste returns the mother liquor system in connection alkali production process with the overflowing liquid of mixing stiff device; The water-insoluble comprising calcium, magnesium, silt that the described attachment insolubles on ceramic micro filter membrane module produces when being and filter heat exchange, suction ammonia father's former wife's II liquid, described backwash liquid waste is the backwash liquid waste that ceramic micro filter membrane module carries out back flushing generation with the hot A I in connection alkali production process.
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|---|---|---|---|
| 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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|---|---|---|---|
| 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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| CN104445549A CN104445549A (en) | 2015-03-25 |
| CN104445549B true CN104445549B (en) | 2016-06-15 |
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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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| CN104445549A (en) | 2015-03-25 |
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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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