CN108439556A - Method is prepared in situ in a kind of softening type hypochlorite - Google Patents
Method is prepared in situ in a kind of softening type hypochlorite Download PDFInfo
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- CN108439556A CN108439556A CN201810200011.2A CN201810200011A CN108439556A CN 108439556 A CN108439556 A CN 108439556A CN 201810200011 A CN201810200011 A CN 201810200011A CN 108439556 A CN108439556 A CN 108439556A
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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
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/24—Halogens or compounds thereof
- C25B1/26—Chlorine; Compounds thereof
- C25B1/265—Chlorates
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B15/00—Operating or servicing cells
- C25B15/08—Supplying or removing reactants or electrolytes; Regeneration of electrolytes
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- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
- Treatment Of Water By Ion Exchange (AREA)
Abstract
The invention discloses a kind of methods that is prepared in situ of softening type hypochlorite, including bating step and prefabrication step；Bating step is specially：Tap water is flowed through into water softener, sofening treatment is carried out to tap water, obtains softened water；Wherein, the pH of softened water is 6.5 7.5, Ying Du≤10ppm, TOC≤2ppm , Tie≤200ppb , Meng≤10ppb , Nie≤5ppm, Fuization Wu≤1ppm；Just step processed is specially：Water processed at the beginning of water processed and second at the beginning of softened water is divided into first, wherein water processed enters in the dissolved salt tank equipped with refining industrial salt at the beginning of first, obtains the first saturated brine, water processed and the first saturated brine carry out temperature control after being mixed to get the second weak brine at the beginning of second.The preparation method of the present invention prevents electrode fouling in electrolytic process, current efficiency from declining, and has ensured the stability of production system；The impurity content of Nacl is strictly controlled, the harmful effect for avoiding excessive impurity from generating electrolysis.
Description
Technical field
The present invention relates to disinfection water treatment fields more particularly to a kind of softening type hypochlorite, and method is prepared in situ.
Background technology
With constantly contaminated and water resource the continuous shortage of water resource on the earth, disinfection water process seems more and more heavier
It wants；Cholorination is current the most widely used water sterilization method, is played an important role in terms of pre- waterproof spreads the disease.
Cholorination mainly adds chlorine or hypochlorite (such as NaClO) into water, can generally generate hypochlorous acid (HClO) and hydrochloric acid
(HCl).The approach for obtaining liquor natrii hypochloritis at present mainly has chlor-alkali plant to manufacture and be prepared in situ, and the secondary chlorine of chlor-alkali plant manufacture
Available chlorine content is 10% or so in acid sodium solution, however lot of experimental data shows the liquor natrii hypochloritis of high concentration easily
It decomposes, daily decomposition amount has reached 0.4mg/L-0.7mg/L, caused the great wasting of resources；Meanwhile high concentration hypochlorous acid
Sodium solution belongs to dangerous material as chlorine, and transport and preservation cost are quite high, and there are great security risks.Sodium hypochlorite is sent out
Raw device generates the sodium hypochlorite solution of low concentration, its Disinfection Effect is good, and it is accurate to add, and safe operation is easy to use, easily stored,
To environment nonhazardous, second of pollution is not generated, and there is advantage very much.
Currently, sodium hypochlorite preparation system in market there are effective chlorine densities unstable, power consumption and salt consumption is excessively high, operation
The problems such as cost is larger, production system stability is poor.The patent of Patent No. 201210334192.0《A kind of electrolytic time chlorine
Sour sodium generating system》A kind of method for electrolysis production liquor natrii hypochloritis is provided, but the invention is not to salinated water
It is pre-processed, causes the impurity concentrations such as Ca, Mg in saline solution too high, in electrolytic process, Ca, Mg plasma are in electrode plate
Upper easy fouling.So as to cause tank voltage increase, power consumption increase, current efficiency reduce, operating cost increases, electrode is even resulted in
Short circuit and cause safety accident.Therefore, current solution is frequently cleaned electrode using hydrochloric acid, removes dirt, this
Manual maintenance cost is substantially increased, meanwhile, frequent pickling significantly reduces electrode life, affects the life of system
Produce stability.
Invention content
For overcome the deficiencies in the prior art, the purpose of the present invention is to provide a kind of scene systems of softening type hypochlorite
Preparation Method, the preparation method first by for produce liquor natrii hypochloritis tap water carry out sofening treatment, go water removal in Ca,
Mg plasmas prevent electrode fouling in electrolytic process, current efficiency from declining, have ensured the stability of production system；Secondly, to work
The impurity content of industry salt is strictly controlled, the harmful effect for avoiding excessive impurity from generating electrolysis.
The purpose of the present invention adopts the following technical scheme that realization：
Method, including bating step and prefabrication step is prepared in situ in a kind of softening type hypochlorite；
Bating step is specially：Tap water is flowed through into water softener, sofening treatment is carried out to tap water, obtains softened water；Its
In, the pH of softened water is 6.5-7.5, Ying Du≤10ppm, TOC≤2ppm , Tie≤200ppb , Meng≤10ppb , Nie≤5ppm, fluorine
Hua Wu≤1ppm；
Just step processed is specially：Water processed at the beginning of water processed and second at the beginning of softened water is divided into first, wherein the first just water entrance processed
In dissolved salt tank equipped with refining industrial salt, the first saturated brine is obtained, second just water processed and the first saturated brine are mixed to get the
Temperature control is carried out after two weak brines；Wherein, refining industrial salt quality requirement is：Lvization Na≤96.3%, Liu Suan Gai≤0.3%, chlorine
Hua Mei≤0.06%, Lvization Gai≤0.1%, Liu Suan Mei≤0.02%, Shui Fen≤3%, Bu the Rong , of Wu≤0.1% Tie≤
0.002% , Meng≤0.0001%, Fuization Wu≤0.00001%.
Further, the mass concentration of the second weak brine is 1.5%-2.5%.
Further, further include temperature control step：Second weak brine is regulated and controled into trip temperature, by the temperature control of the second weak brine
It is made as 17-28 DEG C.
Further, regulated and controled into trip temperature by heater or the second weak brine of cooler pair.
Further, further include electrolysis step：The second weak brine after temperature control is passed through electrolytic cell, hydrogen is generated after electrolysis
And liquor natrii hypochloritis, hydrogen is discharged, liquor natrii hypochloritis is flowed into fluid reservoir, hypochlorite is obtained.
Further, in electrolysis step, air blower is used to be reduced to its volume fraction to be limited for 1% safety density of hydrogen
It is discharged under degree.
The beneficial effects of the present invention are：
1, method is prepared in situ in of the invention softening type hypochlorite, which will be used to produce hypochlorous acid first
The tap water of sodium solution carries out sofening treatment, removes Ca, Mg plasma in water removal, prevents electrode fouling, electric current in electrolytic process
Efficiency declines, and has ensured the stability of production system；Secondly, the impurity content of Nacl is strictly controlled, excess is avoided
Impurity to electrolysis generate harmful effect；
2, the impurity that method is prepared in situ and eliminates weak brine solution of softening type hypochlorite of the present invention, improves electrolysis
Efficiency reduces operating cost；
3, softening type hypochlorite of the present invention is prepared in situ method and can be effectively prevented electrode and tied in electrolytic process
Dirt, electrolytic efficiency reduces after avoiding electrode fouling, and electrolytic cell calorific value is big, and effective chlorine is avoided to decompose at high temperature, improves electricity
Solution efficiency reduces electrolyzer temperature, reduces operating cost；
4, the frequent pickling that method is prepared in situ and avoids electrode of softening type hypochlorite of the present invention, reduces hypochlorous acid
The manual maintenance cost of sodium generator, reduces the machine stop times of sodium hypochlorite production system, has ensured that sodium hypochlorite scene is given birth to
The stability of production system.
Specific implementation mode
In the following, in conjunction with specific implementation mode, the present invention is described further, it should be noted that is do not collided
Under the premise of, new embodiment can be formed between various embodiments described below or between each technical characteristic in any combination.
Method, including bating step and prefabrication step is prepared in situ in a kind of softening type hypochlorite；
Bating step is specially：Tap water is flowed through into water softener, sofening treatment is carried out to tap water, obtains softened water；Its
In, the pH of softened water is 6.5-7.5, Ying Du≤10ppm, TOC≤2ppm , Tie≤200ppb , Meng≤10ppb , Nie≤5ppm, fluorine
Hua Wu≤1ppm；Wherein, hardness, that is, calcium ion and magnesium ion concentration；
Just step processed is specially：Water processed at the beginning of water processed and second at the beginning of softened water is divided into first, wherein the first just water entrance processed
In dissolved salt tank equipped with refining industrial salt, the first saturated brine is obtained, second just water processed and the first saturated brine are mixed to get the
Temperature control is carried out after two weak brines；Wherein, refining industrial salt quality requirement is：Lvization Na≤96.3%, Liu Suan Gai≤0.3%, chlorine
Hua Mei≤0.06%, Lvization Gai≤0.1%, Liu Suan Mei≤0.02%, Shui Fen≤3%, Bu the Rong , of Wu≤0.1% Tie≤
0.002% , Meng≤0.0001%, Fuization Wu≤0.00001%.
As the mode that further carries out, the mass concentration of the second weak brine is 1.5%-2.5%.
Further include temperature control step as mode is further carried out：Second weak brine is regulated and controled into trip temperature, it is dilute by second
The temperature control of brine is 17-28 DEG C.
As mode is further carried out, regulated and controled into trip temperature by heater or the second weak brine of cooler pair.
Further include electrolysis step as mode is further carried out：The second weak brine after temperature control is passed through electrolytic cell, electricity
Hydrogen and liquor natrii hypochloritis are generated after solution, hydrogen is discharged, and liquor natrii hypochloritis is flowed into fluid reservoir, hypochlorous acid is obtained
Salt.
As the mode that further carries out, in electrolysis step, density of hydrogen is reduced to by its volume fraction using air blower
To be discharged under 1% margin of safety.
It is specific embodiment of the present invention below, used raw material, equipment etc. remove special limit in the following embodiments
It can be obtained by buying pattern outside fixed.
Embodiment 1：
A kind of softening type hypochlorite is prepared in situ method, including：
Bating step：Tap water is flowed through into water softener, sofening treatment is carried out to tap water, obtains softened water；Softened water
PH=6.5, hardness=4ppm, TOC=0.6ppm, iron=100ppb, manganese=3ppb, nickel=2ppm, fluoride=0.3ppm；
First step processed：Water processed at the beginning of water processed and second at the beginning of softened water is divided into first, wherein water processed enters equipped with smart at the beginning of first
In the dissolved salt tank of Nacl processed, the first saturated brine is obtained, water processed and the first saturated brine are mixed to get second dilute salt at the beginning of second
The mass concentration of water, the second weak brine is 1.5%；Refining industrial salt quality requirement is：Sodium chloride=96.3%, calcium sulfate=
0.3%, magnesium chloride=0.06%, calcium chloride=0.1%, magnesium sulfate=0.02%, moisture=3%, insoluble matter=0.1%, iron
=0.002%, manganese=0.0001%, fluoride=0.00001%；
Temperature control step：Regulated and controled into trip temperature by heater or the second weak brine of cooler pair, by the temperature of the second weak brine
Degree control is at 17 DEG C；
Electrolysis step：The second weak brine after temperature adjustment is passed through electrolytic cell, hydrogen and liquor natrii hypochloritis are generated after electrolysis,
It uses air blower to be reduced to its volume fraction to be discharged under 1% margin of safety density of hydrogen, liquor natrii hypochloritis is flowed
Enter in fluid reservoir, obtains hypochlorite.
Embodiment 2：
A kind of softening type hypochlorite is prepared in situ method, including：
Bating step：Tap water is flowed through into water softener, sofening treatment is carried out to tap water, obtains softened water, softened water
PH=7.1, hardness=7ppm, TOC=1.2ppm, iron=140ppb, manganese=6ppb, nickel=3ppm, fluoride=0.6ppm；
First step processed：Water processed at the beginning of water processed and second at the beginning of softened water is divided into first, wherein water processed enters equipped with smart at the beginning of first
In the dissolved salt tank of Nacl processed, the first saturated brine is obtained, water processed and the first saturated brine are mixed to get second dilute salt at the beginning of second
The mass concentration of water, the second weak brine is 2.0%；Refining industrial salt quality requirement is：Sodium chloride=97.3%, calcium sulfate=
0.2%, magnesium chloride=0.05%, calcium chloride=0.1%, magnesium sulfate=0.06%, moisture=2%, insoluble matter=0.05%, iron
=0.001%, manganese=0.00006%, fluoride=0.000008%；
Temperature control step：Regulated and controled into trip temperature by heater or the second weak brine of cooler pair, by the temperature of the second weak brine
Degree control is at 24 DEG C；
Electrolysis step：The second weak brine after temperature adjustment is passed through electrolytic cell, hydrogen and liquor natrii hypochloritis are generated after electrolysis,
It uses air blower to be reduced to its volume fraction to be discharged under 1% margin of safety density of hydrogen, liquor natrii hypochloritis is flowed
Enter in fluid reservoir, obtains hypochlorite.
Embodiment 3：
A kind of softening type hypochlorite is prepared in situ method, including：
Bating step：Tap water is flowed through into water softener, sofening treatment is carried out to tap water, obtains softened water, softened water
PH=7.5, hardness=10ppm, TOC=2ppm, iron=200ppb, manganese=10ppb, nickel=5ppm, fluoride=1ppm；
First step processed：Water processed at the beginning of water processed and second at the beginning of softened water is divided into first, wherein water processed enters equipped with smart at the beginning of first
In the dissolved salt tank of Nacl processed, the first saturated brine is obtained, water processed and the first saturated brine are mixed to get second dilute salt at the beginning of second
The mass concentration of water, the second weak brine is 2.2%；Refining industrial salt quality requirement is：Sodium chloride=98.1%, calcium sulfate=
0.15%, magnesium chloride=0.04%, calcium chloride=0.08%, magnesium sulfate=0.03%, moisture=1.8%, insoluble matter=
0.04%, iron=0.0008%, manganese=0.00005%, fluoride=0.000005%；
Temperature control step：Regulated and controled into trip temperature by heater or the second weak brine of cooler pair, by the temperature of the second weak brine
Degree control is at 28 DEG C；
Electrolysis step：The second weak brine after temperature adjustment is passed through electrolytic cell, hydrogen and liquor natrii hypochloritis are generated after electrolysis,
It uses air blower to be reduced to its volume fraction to be discharged under 1% margin of safety density of hydrogen, liquor natrii hypochloritis is flowed
Enter in fluid reservoir, obtains hypochlorite.
Comparative example 1：
A kind of preparation method of hypochlorite, including：
1, the tap water of hardness (Ca, Mg ion)=30ppm and saturated brine saturated salt solution are mixed to form first dense
The weak brine that degree is 2.5%；
2, regulated and controled into trip temperature by heater or the second weak brine of cooler pair, the temperature control of the second weak brine is existed
25℃；
4, the second weak brine after temperature adjustment is passed through electrolytic cell, hydrogen and liquor natrii hypochloritis is generated after electrolysis, using drum
Density of hydrogen is reduced under the margin of safety that its volume fraction is 1% and is discharged by wind turbine, and liquor natrii hypochloritis is flowed into liquid storage
In tank, hypochlorite is obtained.
Effect assessment and performance detection
Indices in embodiment 1-3 and comparative example 1 are detected, the results are shown in Table 1.
1 testing result of table
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Comparative example 1 | |
| Water hardness | 4ppm | 7ppm | 10ppm | 30ppm |
| Brine strength | 1.5% | 2.0% | 2.5% | 2.5% |
| Electrolytic cell enters coolant-temperature gage | 17℃ | 25℃ | 28℃ | 25℃ |
| Electrolytic cell leaving water temperature | 34℃ | 37℃ | 39℃ | 45℃ |
| Effective chlorine density | 0.85% | 0.86% | 0.88% | 0.65% |
| Direct current consumption | 3.6KW/kg | 3.5KW/kg | 3.4KW/kg | 6.8KW/kg |
| Salt consumes | 2.5Kg/Kg | 2.5Kg/Kg | 2.6Kg/Kg | 3.6Kg/Kg |
By table 1 as it can be seen that power consumption and the salt consumption of the embodiment of the present invention 1-3 is below comparative example 1, and effective chlorine density is high
In comparative example 1, this illustrates Ca, Mg plasma that method is prepared in situ and goes in water removal of the softening type hypochlorite of the present invention, prevents
Only electrode fouling, current efficiency decline in electrolytic process, have ensured the stability of production system, secondly, to the impurity of Nacl
Content is strictly controlled, and the harmful effect for avoiding excessive impurity from generating electrolysis improves electrolytic efficiency, reduces operation
Cost reduces the manual maintenance cost of hypochlorite generator, reduces the machine stop times of sodium hypochlorite production system, ensures
The stability of sodium hypochlorite Field Site Production System.
The above embodiment is only the preferred embodiment of the present invention, and the scope of protection of the present invention is not limited thereto,
The variation and replacement for any unsubstantiality that those skilled in the art is done on the basis of the present invention belong to institute of the present invention
Claimed range.
Claims (6)
1. method is prepared in situ in a kind of softening type hypochlorite, which is characterized in that including bating step and prefabrication step；
Bating step is specially：Tap water is flowed through into water softener, sofening treatment is carried out to tap water, obtains softened water；Wherein, soft
The pH for changing water is 6.5-7.5, Ying Du≤10ppm, TOC≤2ppm , Tie≤200ppb , Meng≤10ppb , Nie≤5ppm, fluoride
≦1ppm；
Just step processed is specially：Water processed at the beginning of water processed and second at the beginning of softened water is divided into first, wherein water processed enters and is equipped at the beginning of first
In the dissolved salt tank of refining industrial salt, the first saturated brine is obtained, second just with the first saturated brine to be mixed to get second dilute for water processed
Temperature control is carried out after brine；Wherein, refining industrial salt quality requirement is：Lvization Na≤96.3%, Liu Suan Gai≤0.3%, magnesium chloride
≤ 0.06%, Lvization Gai≤0.1%, Liu Suan Mei≤0.02%, Shui Fen≤3%, Bu Rong , Tie≤0.002% of Wu≤0.1%, manganese
≤ 0.0001%, Fuization Wu≤0.00001%.
2. method is prepared in situ in softening type hypochlorite as described in claim 1, which is characterized in that the matter of the second weak brine
Measure a concentration of 1.5%-2.5%.
3. method is prepared in situ in softening type hypochlorite as described in claim 1, which is characterized in that further include temperature control step
Suddenly：Second weak brine is regulated and controled into trip temperature, is 17-28 DEG C by the temperature control of the second weak brine.
4. method is prepared in situ in softening type hypochlorite as claimed in claim 3, which is characterized in that by heater or cold
But the second weak brine of device pair regulates and controls into trip temperature.
5. method is prepared in situ in softening type hypochlorite as claimed in claim 3, which is characterized in that further include electrolysis step
Suddenly：The second weak brine after temperature control is passed through electrolytic cell, hydrogen and liquor natrii hypochloritis are generated after electrolysis, hydrogen is discharged, it will
Liquor natrii hypochloritis flows into fluid reservoir, obtains hypochlorite.
6. method is prepared in situ in softening type hypochlorite as claimed in claim 5, which is characterized in that in electrolysis step, adopt
Density of hydrogen is reduced under the margin of safety that its volume fraction is 1% with air blower and is discharged.
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Applications Claiming Priority (1)
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|---|---|---|---|
| CN201810200011.2A CN108439556A (en) | 2018-03-12 | 2018-03-12 | Method is prepared in situ in a kind of softening type hypochlorite |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111676486A (en) * | 2020-06-04 | 2020-09-18 | 山东山大华特科技股份有限公司 | Sodium hypochlorite production process and device for electrolyzing low-concentration brine by using membrane-free method |
| CN119144993A (en) * | 2023-06-16 | 2024-12-17 | 中国科学院宁波材料技术与工程研究所 | Electrolytic hydrogen production catalyst, anode, preparation method, activation method and application thereof |
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| CA2824225A1 (en) * | 2010-12-09 | 2012-06-14 | John Kuiphoff | Compact closed-loop electrolyzing process and apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111676486A (en) * | 2020-06-04 | 2020-09-18 | 山东山大华特科技股份有限公司 | Sodium hypochlorite production process and device for electrolyzing low-concentration brine by using membrane-free method |
| CN119144993A (en) * | 2023-06-16 | 2024-12-17 | 中国科学院宁波材料技术与工程研究所 | Electrolytic hydrogen production catalyst, anode, preparation method, activation method and application thereof |
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