CN101585574A - Method and device for removing bromate in water - Google Patents
Method and device for removing bromate in water Download PDFInfo
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- CN101585574A CN101585574A CNA2009100337141A CN200910033714A CN101585574A CN 101585574 A CN101585574 A CN 101585574A CN A2009100337141 A CNA2009100337141 A CN A2009100337141A CN 200910033714 A CN200910033714 A CN 200910033714A CN 101585574 A CN101585574 A CN 101585574A
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Abstract
The invention relates to a method and a device for removing the bromate in water, which is characterized by radiating the water by ultraviolet with the wavelength between 150-250 nm, and is particularly suitable for the natural water production that the water is radiated by the ultraviolet with the wavelength between 150-240 nm and then the bromate in water is measured not more than 0.01 mg/L. Compared with the prior art, the method is more simple, adds an ultraviolet radiation technology before filling the natural mineral water, restrains the bromate content in water, maintains the ozone residual effect in filling, does not change the raw water quality such as pH value and needs any processing medicament.
Description
Technical field
The present invention relates to the method and apparatus of bromate in a kind of easy removal water,, keep satisfactory residue ozone simultaneously again especially for removing bromate in the water after natural waters such as natural mineral water or the mountain spring water production ozone sterilization technology.
Background technology
Except having many organic and inorganicss, also there is the bromide (bromides) of ppb magnitude simultaneously in the natural former water.Present natural water production advanced treatment process for sterilizing such as natural mineral water or mountain spring water, more employing ozone sterilization, and require have certain ozone residual for bottled water, can be simultaneously to water and bottle cap sterilization.But when using ozonization, bromide and ozone reaction in the water can change into the bromate bromate (BrO3 that conventional water treatment process is difficult to remove
-), then stay in the water after the bottling.
Bromate has been identified as 2B level potential carcinogen in the world, and in the tap water of the World Health Organization and EPA defined, the bromate maximum permissible concentration is in 0.01mg/L.Ozone is the most effective sterilization method of generally acknowledging, drink raw water at present and do not find as yet than the more effective method for disinfection of ozone, so ozone sterilization by product---bromate outwardness.
The disclosed catalytic ozonation of Chinese patent CN101327985 is removed the method for organic pollutant in the water, a, be that the solid catalyst of 1nm～10cm is put into the catalytic ozonation contact reactor with fluidized-bed or fixed bed form with particle diameter, wherein the total gauge control of solid catalyst is at 10～500cm; B, pending water is introduced reactor with downflow system, reverse-flow or hybrid-type mode with the flow velocity of 1～50m/h, adopt titanium plate micro-pore aeration, standpipe aeration or peripheral uniform aeration to carry out the ozone gas distribution before the reactor or in the reactor, the dosage of ozone is 1 μ g/L～100mg/L, and the mol ratio 1: 0.1～1 by ozone dosage and hydrogen peroxide dosage adds hydrogen peroxide then; Be 1～300min the duration of contact of c, control ozone, hydrogen peroxide and pending water, and catalyzer is 1～180min with the duration of contact that contains the pending water of ozone, hydrogen peroxide.Reach and solve the hydrogen peroxide residue problem, the generation of minimizing bromate.Though this method can be used for processing drinking water, add the chemical agent amount and need accurately control, complex treatment process.
The method of bromate in the water is removed in Chinese patent CN101439900 redox, removes bromate in the water by the ferrous sulfate reductibility, and method is: first controls oxygen in water concentration by microorganism nitrification on ammonium salt and the gac is in lower level; Second by bromate in the reductibility removal water of ferrous sulfate; The 3rd by excessive iron ion in the filtering unit removal water.System comprises: the pre-treatment working zone of control oxygen in water, the redox working zone of removing bromate and removal excessive iron ionic filtration treatment working zone.Can reach more than 60% bromate removal rate.This method, complex treatment process, need to increase by three sections processing, and reduce by ferrous sulfate for reaching the removal bromate, after this also will remove the excessive iron ion again, processing cost increases more, and removal effect is undesirable, can only remove about 60%, not be suitable for the removal of water middle and high concentration bromate, be difficult to stable reach tap water bromate is allowed content standard.
Above-mentioned two patents are handled bromate, not only are all complex process, need add chemical agent, cause processing cost to strengthen, and also can change former water quality, and easily cause secondary pollution.
U.S. Pat 5609766 discloses a kind of treatment process that contains bromide water with ozonize, after making the water acidifying, be difficult for changing into bromate, suppress the generation of bromate in the ozone sterilization, propose to adopt to add carbon dioxide in water, the pH value of regulating water is less than 6.5.Yet, add the gas technology complexity in the production water conservancy project skill, increase water producing cost, and can only be to suppress bromate to generate, and can not finish its generation of blocking-up, the bromate that generates proposes to adopt suitable activated carbon to adsorb, but shortcoming is to select specific activated carbon, and activated carbon treatment is subject to factor affecting such as the pH value of processed water and water temperature, effect instability, particularly activated carbon adsorption has still been removed residual ozone simultaneously, does not meet the bottled mineral water processing requirement.Besides, this method is the quality that acidity has changed water because of making water, may corrode water making pipe road and equipment on the one hand, does not also meet the expectation that market demands provide the weakly alkaline healthy drinking water simultaneously.
Still having is worth improved place.
Summary of the invention
The object of the invention is to overcome the deficiency of above-mentioned prior art, provides a kind of technology simple, only increases by a procedure, and processing cost is low, removes the efficient height, is not subjected to the method for bromate in the removal water of concentration affects.
It is residual to another object of the present invention is to provide a kind of while can keep in the water required ozone, does not change the method for bromate in the removal water of former water quality.
A further object of the present invention is to provide the device of bromate in a kind of removal water that can realize above-mentioned purpose.
The present invention's first purpose realizes, through the experimental study of applicant to removal bromate method, be surprised to find that UV-light has Decomposition to bromate, find that bromate all can produce decomposition in wavelength region 150-250nm UV-irradiation in the water, therefore proposing to increase by one adopts wavelength to comprise 150-250nm UV-irradiation decomposition bromate, thereby overcome all deficiencies of above-mentioned prior art, realized the object of the invention.Specifically, the present invention removes the method for bromate in the water, it is characterized in that making water process wavelength between the 150-250nm UV-irradiation.
And ozone also there is Decomposition in view of UV-light, further study the ultra-violet absorption spectrum of bromate and ozone, find that ozone is very little at ultraviolet band 150-210nm absorption cross, at 210-310nm the decomposition of absorption is arranged then, especially the most severe near 250nm, to decompose, and ultraviolet wavelength is between 150-240nm, bromate can efficiently be decomposed, and ozone can not be decomposed or can not decomposed fully, can satisfy that to keep in the water desired ozone residual, therefore for tap water, behind the water preparation process ozonization, through using the 150-240nm UV-irradiation, detect water outlet and require bromate content to be not more than 0.01mg/L.
The better uv irradiating spectrum of the present invention is the 150-210nm wave band, and this wavelength band bromate is decomposed, and ozone does not almost decompose.From industrial practical application angle, the optimal wavelength scope is 170-210nm, can do to become to resemble that to make light source the ordinary lamps pipe simple, if wavelength is lower than 170nm, then see through ability relatively a little less than, bring difficulty to practical application in industry.
Research thinks that UV-irradiation decomposes bromate, mechanism may be bromate at the 150-193nm wave band, mainly decompose by the active intermediate H of water homolytic reaction generation and the indirect action of eaq (hydrated electron); Then mainly decompose at the 193-240nm wave band by direct photolysis.
UV-irradiation time of the present invention or flow velocity can be according to handling back bromate concentration requirement, and irradiates light intensity, the illumination degree of depth etc. are comprehensive determines.For example be used for tap water, a restricted condition is to satisfy water outlet bromate content to be not more than 0.01mg/L.
Described wavelength is between the 150-250nm UV-light, particularly wavelength is between 150-240nm and 170-210nm UV-light, test relatively, a kind of Excimer UV lamp that more preferably adopts, good than the not only Wavelength matched property of other ultraviolet lamps, and higher in this output wavelength scope light intensity, bromate has higher removal efficient and/or processing power in the decomposition removal water, and can avoid the decomposition fully to ozone.
The present invention's second purpose realizes, removes the device of bromate in the water, it is characterized in that one or many wavelength of placement are between the ultra-violet lamp of 150-250nm in handling tank.Wherein more preferably adopt wavelength region 150-240nm or 170-210nm UV-light.
Said processing tank is mainly used in to install and decomposes the bromate ultraviolet lamp and hold treat fluid (for example water), according to treatment process, can adopt similar existing ultraviolet water treatment sterilizing device structure, and is for example open, closed; The tank cross-sectional shape is not limit yet, and can be circular, can be other geometrical shapies yet; Processing mode can adopt immersion, also can adopt overflow-type.
Handle tank, a kind of better employing stainless steel can become the minute surface with light reflection ultraviolet by to the inboard wall of cistern polishing, helps improving processing efficiency.Certainly those of ordinary skills also can understand, can also adopt other materials or mode, form the minute surface with reflection function at the inboard wall of cistern face.
Test relatively, ultraviolet lamp tube tube spacing and fluorescent tube and inboard wall of cistern spacing, have treatment effect and processing power preferably to be no more than 4cm, the best to be not more than 2cm for well, specifically can be determined by detecting the penetration depth of UV-light in treat fluid especially.
Ultraviolet lamp light emitting drive power supply can be to power up by counter electrode in the prior art to make it send UV-light, also can adopt the 2450MHz microwave source, closes the transmission energy by the microwave lotus root and makes fluorescent tube send UV-light.When treatment capacity was big, the present invention preferentially recommended the latter, easily obtained the ultraviolet light intensity output of high-power fluorescent tube and Geng Gao, and it is simpler to be used for the treat fluid structure, operates more handy and safe.
The present invention removes the method and apparatus of bromate in the water, with respect to prior art, treatment process is simpler, and do not add any preparation, do not change former water preparation process, be particularly suitable for natural water productions such as Processing of Preparation natural mineral water or mountain spring water, only need before existing natural mineral water production line can, to increase by one 150-240nm UV-irradiation technology, the alternative efficient bromate that produces in the system water that decomposes, reach bromate content in the constraint water, can satisfy can simultaneously again and keep the ozone residual effect, need not add any processing medicament, do not change for example PH of former water quality yet, do not change the mineral water taste.Test sample water detects: without between 150-240nm wavelength UV-irradiation, contain bromate in the water (with BrO
3Meter) 510 μ g/L through between 150-240nm wavelength UV-irradiation, contain bromate (with BrO in the water
3Meter)＜5 μ g/L, ozone still keeps required surplus, show between 150-240nm wavelength UV-irradiation and can decompose bromate in the natural mineral water by selectivity efficient fully, degradation production can not react to each other and regenerate bromate, does not influence reservation ozone simultaneously again.The inventive method and device not only can be used for preparing natural water productions such as natural mineral water or mountain spring water and remove bromate, and can be used for various water and remove bromate.And because wavelength 150-250nm still belongs to the uv disinfection wave band, thereby the sterilization and disinfection that can also be used for fluid (water, gas) is handled.
Below in conjunction with 7 exemplary embodiments; the present invention is further understood in exemplary illustration and help; but the embodiment detail only is for the present invention is described; do not represent the present invention to conceive whole technical schemes down; therefore should not be construed as the technical scheme qualification total to the present invention, some do not depart from the unsubstantiality of the present invention's design and change In the view of the technician; for example simple the change or replacement of technical characterictic to have same or similar technique effect all belongs to protection domain of the present invention.
Description of drawings
Fig. 1 is an embodiment of the present invention treatment unit structural representation.
Fig. 2 is the another kind of embodiment treatment unit of the present invention structural representation.
Fig. 3 is Fig. 1,2 middle section structural representations.
Embodiment
Embodiment 1: referring to Fig. 1,3, in the sealing 304# of the long 1000mm of internal diameter 123mm stainless steel tube 1, being set up in parallel many wavelength is 222nm KrCl
*Quasi-molecule fluorescent tube 2, inwall becomes minute surface through polished finish, fluorescent tube tube spacing and fluorescent tube and stainless steel tube cavity inner wall spacing are not more than 15mm, the Excimer UV lamp with high-frequency and high-voltage power supply 3, by silicon rubber lead 4 to each quasi-molecule fluorescent tube 2 power supply 1400W.Treating water (through the natural mineral water of ozone sterilization) is entered by import 5, discharges through water outlet 6, and flow is 100L/min.Detecting and handling preceding bromate concentration is 0.51mg/L, and bromate concentration is lower than used chromatography of ions detector minimum detectable level 0.005mg/L in the water of processing back, fails to detect, and ozone still keeps required surplus.
Embodiment 2: as embodiment 1, wherein light source is wavelength 207nm KrBr
*Excimer lamp, detection has close result, substantially changes before and after ozone concn is handled.
Embodiment 3: as embodiment 1, wherein light source is wavelength 190nm KrBr
*Excimer lamp, detection has close result, substantially changes before and after ozone concn is handled.
Embodiment 4: as embodiment 1, wherein light source is wavelength 172nm Xe2
*Excimer lamp, detection has close result, substantially changes before and after ozone concn is handled.
Embodiment 5: as embodiment 1, light source is for comprising the low pressure krypton speedlight of 175-240nm wave band part in its radiation spectrum, decompose the bromate detection and have close result, just handle back ozone major part and be decomposed, can be used for the water treatment of the residual no requirement (NR) occasion of ozone.
Embodiment 6: as embodiment 1, light source is for comprising the middle pressure mercury ultraviolet lamp of 180-240nm wave band part in its radiation spectrum, decompose the bromate detection and have close result, just handle back ozone major part and be decomposed, can be used for the water treatment of the residual no requirement (NR) occasion of ozone.
Embodiment 7: referring to Fig. 2, as described above, wherein making fluorescent tube send the UV-light working power is microwave rf generator, produces the 2450MHz microwave by magnetron 8 and enters resonator cavity 7, excites the fluorescent tube 2 of end insertion resonator cavity luminous.The magnetron microwave power is 800W.
To those skilled in the art; under this patent design and specific embodiment enlightenment; some distortion that can directly derive or associate from this patent disclosure and general knowledge; those of ordinary skills will recognize also can adopt additive method; or the substituting of known technology commonly used in the prior art; and the mutual various combination between feature; the for example change of ultraviolet source; handle the change of tank; the change for the treatment of water, the change of processing mode, and taking of understanding of technician strengthened wavelength region (comprising the 150-250nm UV-light) and decomposed bromate; be used for the processing of non-bottled water; or the like unsubstantiality change, can be employed equally, can both realize and basic identical function of the foregoing description and effect; launch for example no longer one by one to describe in detail, all belong to this patent protection domain.
Claims (10)
1, removes the method for bromate in the water, it is characterized in that making water process wavelength between the 150-250nm UV-irradiation.
2, according to the method for bromate in the described removal water of claim 1, it is characterized in that making water process wavelength between the 150-240nm UV-irradiation, detect water outlet and be not more than 0.01mg/L with bromate content.
3,, it is characterized in that uv irradiating spectrum is 170-210nm according to the method for bromate in the described removal water of claim 2.
4, according to the method for bromate in claim 1, the 2 or 3 described removal water, it is characterized in that producing above-mentioned UV spectrum is the quasi-molecule ultraviolet lamp.
5, remove the device of bromate in the water, it is characterized in that one or many wavelength of placement are between the ultra-violet lamp of 150-250nm in handling tank.
6,, it is characterized in that the ultra-violet lamp spectral range is 150-240nm according to bromate device in the described removal water of claim 5.
7,, it is characterized in that the ultra-violet lamp spectral range is 170-210nm according to bromate device in the described removal water of claim 6.
8, according to bromate device in claim 5, the 6 or 7 described removal water, it is characterized in that fluorescent tube tube spacing and fluorescent tube and inboard wall of cistern spacing are not more than 4cm.
9, bromate device in the described according to Claim 8 removal water is characterized in that fluorescent tube tube spacing and fluorescent tube and inboard wall of cistern spacing are not more than 2cm.
10, according to bromate device in claim 5,6, the 7 or 9 described removal water, it is characterized in that the ultraviolet lamp light emitting drive is the 2450MHz microwave source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100337141A CN101585574A (en) | 2009-06-02 | 2009-06-02 | Method and device for removing bromate in water |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100337141A CN101585574A (en) | 2009-06-02 | 2009-06-02 | Method and device for removing bromate in water |
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| CN101585574A true CN101585574A (en) | 2009-11-25 |
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| CNA2009100337141A Pending CN101585574A (en) | 2009-06-02 | 2009-06-02 | Method and device for removing bromate in water |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102097282A (en) * | 2010-11-30 | 2011-06-15 | 王颂 | Electrodeless excimer lamp and application thereof |
| CN102276050A (en) * | 2011-05-30 | 2011-12-14 | 广东省微生物研究所 | Device for controlling ozonization byproduct bromate in packaged drinking water |
| CN102603123A (en) * | 2012-03-30 | 2012-07-25 | 广东画景饮料有限公司 | Method for processing hot alkaline spring water |
| CN102795733A (en) * | 2012-08-03 | 2012-11-28 | 莫乃军 | Method for lowering bromate content in drinking water |
| CN103227098A (en) * | 2013-05-15 | 2013-07-31 | 王颂 | 282nm/222nm electrodeless excimer lamp |
| CN111470688A (en) * | 2020-05-11 | 2020-07-31 | 深圳市久大轻工机械有限公司 | Photocatalytic decomposition device and photocatalytic decomposition process for bromate |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102097282A (en) * | 2010-11-30 | 2011-06-15 | 王颂 | Electrodeless excimer lamp and application thereof |
| CN102276050A (en) * | 2011-05-30 | 2011-12-14 | 广东省微生物研究所 | Device for controlling ozonization byproduct bromate in packaged drinking water |
| CN102276050B (en) * | 2011-05-30 | 2013-02-27 | 广东省微生物研究所 | Device for controlling ozonization byproduct bromate in packaged drinking water |
| CN102603123A (en) * | 2012-03-30 | 2012-07-25 | 广东画景饮料有限公司 | Method for processing hot alkaline spring water |
| CN102603123B (en) * | 2012-03-30 | 2013-11-20 | 广东画景饮料有限公司 | Method for processing hot alkaline spring water |
| CN102795733A (en) * | 2012-08-03 | 2012-11-28 | 莫乃军 | Method for lowering bromate content in drinking water |
| CN103227098A (en) * | 2013-05-15 | 2013-07-31 | 王颂 | 282nm/222nm electrodeless excimer lamp |
| CN111470688A (en) * | 2020-05-11 | 2020-07-31 | 深圳市久大轻工机械有限公司 | Photocatalytic decomposition device and photocatalytic decomposition process for bromate |
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Application publication date: 20091125 |