CN103288189A - Method for disinfecting pipe network through in-situ generation of liquid chlorine by utilizing persulfate - Google Patents
Method for disinfecting pipe network through in-situ generation of liquid chlorine by utilizing persulfate Download PDFInfo
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- CN103288189A CN103288189A CN2013102466923A CN201310246692A CN103288189A CN 103288189 A CN103288189 A CN 103288189A CN 2013102466923 A CN2013102466923 A CN 2013102466923A CN 201310246692 A CN201310246692 A CN 201310246692A CN 103288189 A CN103288189 A CN 103288189A
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Abstract
The invention relates to a method for disinfecting a pipe network, and concretely relates to a method for disinfecting a pipe network through the in-situ generation of liquid chlorine by utilizing persulfate. The problems of chlorinator installation needing, high investment cost, complex operation, high chlorine pot transportation and storage requirements, easy generation of hidden safety troubles, and pollution to air in the surrounding environment existing in present pipe network secondary chlorination methods are solved in the invention. The method comprises a step of adding persulfate to the pipe network and a step of uniformly stirring to complete the method for disinfecting the pipe network through the in-situ generation of liquid chlorine by utilizing persulfate. In the invention, the amount of liquid chlorine added to water from a water treatment plant is reduced, so the production amount of DBPs (chlorination disinfection byproducts) is reduced; in-situ generated liquid chlorine has lasting action and a good disinfection effect; persulfate has stable chemical properties, is convenient to transport and preserve, and is more safe and reliable than chlorine; a persulfate adding device is simple, so the method has the advantages of simple and easily-implemented operation, omitting of an automatic chlorine adding device, and reduction of the running investment cost; and persulfate does not pollute the surrounding environment. The method is used for disinfecting the pipe network.
Description
Technical field
The present invention relates to the pipe network sterilization method.
Background technology
At present, the liquid chlorine sterilization remains the main flow technology of water disinfection process.According to GB5749-2006 " drinking water sanitary standard " requirement, when water factory adopts disinfection by chlorine, water outlet chlorine residue 〉=0.3mg/L, pipe network tip chlorine residue 〉=0.05mg/L, reach the requirement that this standard could satisfy drinking water disinfection, therefore, the water treatment plant chlorine-throwed quantity is generally greater than 2mg/L.In recent years, along with the continuous deterioration of source quality, chlorine dosage also constantly increases; Along with the continuous expansion of city size, it is wide that water supply coverage becomes, and water delivery line increases, and the pipe network tip residual chlorine amount when long distance is supplied water does not reach requirement.If strengthen water supply plant water outlet chlorine-throwed quantity then can cause pipe network front end tap water that bigger chlorine taste is arranged, influence resident living, and excessive chlorine also forms chloro disinfection byproduct (DBP) (DBPs) easily, human body is produced endanger.Just need the secondary chlorination in order to address the above problem, this method is distributed supply technology, adds efficient point by the chlorine in water transfer pipe network and adds again or additional chlorine, changes the concentration distribution of chlorine, improves water supply quality.This shows that the secondary chlorination is to solve a kind of highly effective mode that water supply network is carried chlorine residue deficiency in the way in water supply network.Yet also there is following drawback in the secondary chlorination: (1) secondary chlorination need be installed chlorination equipment, the investment cost height; (2) the chlorine pot transportation is deposited and is required height, and potential safety hazard easily takes place; (3) pipe network midway chlorination can pollute the air of surrounding environment.
Summary of the invention
The present invention to solve existing pipe network secondary chlorination method exist need to install chlorination equipment, investment cost height, complicated operation, chlorine pot transportation deposit require high, easily take place potential safety hazard, cause the ambient air pollution problems, and provide a kind of pipe network sterilization method that utilizes the persulphate original position to produce liquid chlorine.
A kind of pipe network sterilization method that utilizes the persulphate original position to produce liquid chlorine, specifically carry out according to following steps:
Persulphate is added in the pipe network, stirs, finish the pipe network sterilization method that utilizes the persulphate original position to produce liquid chlorine.
The dosing method of persulphate described in the present invention is for directly adding with the form of solid persulphate or adding with the form of persulfate solution.
A kind of principle of utilizing the persulphate original position to produce the pipe network sterilization method of liquid chlorine of the present invention reacts for the chlorion that exists in persulphate and the water, original position generates liquid chlorine, the liquid chlorine that produces can guarantee the sterilization that pipe network water is continual and steady, make long distance carry the requirement that also can satisfy the terminal sterilization of pipe network, reaction formula is as follows:
HSO
5 -+2Cl
-+2H
+=Cl
2+HSO
4 -+H
2O
Because chloride ion content can be higher in the water after natural water body itself just contained chlorion and passes through the chlorination processing, generally at tens to 100 milligrams every liter.Therefore, under the chlorion existence condition, it is feasible utilizing persulphate generation liquid chlorine that tap water is carried out disinfection.
The invention has the beneficial effects as follows:
(1) utilizes original chlorion original position generation liquid chlorine in the water, can reduce the liquid chlorine dosage of water treatment plant output water, thereby reduce the growing amount of DBPs, and chlorion can obtain recycle in the water, has important Significance for Environment;
(2) persulphate and chlorion speed of reaction are moderate, and the liquid chlorine that original position produces is evenly distributed in water, acts on lastingly, sterilisation effect is good;
(3) green emerging oxygenant persulphate is as pulverulent solids, and chemical property is stable, is convenient to transportation and preservation, compares more safe and reliable with chlorine;
(4) the persulphate adding equipment is simple, but wiring solution-forming or pressed powder directly be added in the pipe network, operation is simple, saved automatic chlorination equipment, reduced the operation investment cost;
(5) persulphate free from extraneous odour, nontoxic, harmless, safe and effective can not produce surrounding environment and pollute.
A kind of novel pipe network sterilization method that utilizes the persulphate original position to produce liquid chlorine of the present invention has namely kept the advantage that original liquid chlorine is sterilized, and has overcome the shortcoming of secondary chlorination in the pipe network again, has good engineering application.Persulphate itself also has oxidation and disinfection simultaneously, and better sterilisation effect is played in The combined effect meeting.
The present invention is used for the pipe network sterilization.
Description of drawings
Fig. 1 is contents of residual chlorine test pattern in embodiment one water.
Embodiment
Technical solution of the present invention is not limited to following cited embodiment, also comprises the arbitrary combination between each embodiment.
Embodiment one: a kind of pipe network sterilization method that utilizes the persulphate original position to produce liquid chlorine of present embodiment, specifically carry out according to following steps:
Persulphate is added in the pipe network, stirs, finish the pipe network sterilization method that utilizes the persulphate original position to produce liquid chlorine.
A kind of novel pipe network sterilization method that utilizes the persulphate original position to produce liquid chlorine of present embodiment has namely kept the advantage that original liquid chlorine is sterilized, and has overcome the shortcoming of secondary chlorination in the pipe network again, has good engineering application.Persulphate itself also has oxidation and disinfection simultaneously, and better sterilisation effect is played in The combined effect meeting.
Embodiment two: what present embodiment and embodiment one were different is: the concentration that adds of persulphate is 0.1～50mg/L.Other is identical with embodiment one.
Embodiment three: what present embodiment and embodiment one were different is: above-mentioned persulphate is one or both combinations by arbitrary proportion in peroxy-monosulfate and the peroxydisulfate.Other is identical with embodiment one.
Embodiment four: what present embodiment was different with one of embodiment one to three is: above-mentioned peroxy-monosulfate is one or more combinations by arbitrary proportion in permonosulphuric acid potassium, permonosulphuric acid sodium and the permonosulphuric acid ammonium.Other is identical with one of embodiment one to three.
Embodiment five: what present embodiment was different with one of embodiment one to three is: above-mentioned peroxydisulfate is one or more combinations by arbitrary proportion in Potassium Persulfate, Sodium persulfate and the ammonium peroxydisulfate.Other is identical with one of embodiment one to three.
Adopt following examples checking beneficial effect of the present invention:
Embodiment one:
A kind of pipe network sterilization method that utilizes the persulphate original position to produce liquid chlorine of present embodiment, specifically carry out according to following steps:
Persulphate is added in the pipe network, stirs, finish the pipe network sterilization method that utilizes the persulphate original position to produce liquid chlorine; Wherein, persulphate is permonosulphuric acid potassium, and the concentration that adds of persulphate is 2.5mg/L.
The residual chlorine amount of the tap water in the above-mentioned webmaster is 0.04mg/L, chlorine ion concentration is 103mg/L, add the permonosulphuric acid potassium solution in tap water, the permonosulphuric acid potassium concn is 2.5mg/L, fully mix the back different time sections and measure contents of residual chlorine in the water, the contents of residual chlorine test pattern as shown in Figure 1 in the water, as we can see from the figure, carrying out along with the reaction times, the growing amount of chlorine residue increases gradually, residual chlorine amount in the reaction 5h water just can reach 0.3mg/L, can guarantee the sterilization that pipe network water is continual and steady fully, makes long distance carry the requirement that also can satisfy the terminal sterilization of pipe network.
Claims (5)
1. a pipe network sterilization method that utilizes the persulphate original position to produce liquid chlorine is characterized in that a kind of pipe network sterilization method that utilizes the persulphate original position to produce liquid chlorine, specifically carries out according to following steps:
Persulphate is added in the pipe network, stirs, finish the pipe network sterilization method that utilizes the persulphate original position to produce liquid chlorine.
2. a kind of pipe network sterilization method that utilizes the persulphate original position to produce liquid chlorine according to claim 1 is characterized in that the concentration that adds of persulphate is 0.1～50mg/L.
3. a kind of pipe network sterilization method that utilizes the persulphate original position to produce liquid chlorine according to claim 1 is characterized in that above-mentioned persulphate is one or both combinations by arbitrary proportion in peroxy-monosulfate and the peroxydisulfate.
4. a kind of pipe network sterilization method that utilizes the persulphate original position to produce liquid chlorine according to claim 3 is characterized in that above-mentioned peroxy-monosulfate is one or more combinations by arbitrary proportion in permonosulphuric acid potassium, permonosulphuric acid sodium and the permonosulphuric acid ammonium.
5. a kind of pipe network sterilization method that utilizes the persulphate original position to produce liquid chlorine according to claim 3 is characterized in that above-mentioned peroxydisulfate is one or more combinations by arbitrary proportion in Potassium Persulfate, Sodium persulfate and the ammonium peroxydisulfate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013102466923A CN103288189A (en) | 2013-06-20 | 2013-06-20 | Method for disinfecting pipe network through in-situ generation of liquid chlorine by utilizing persulfate |
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| CN2013102466923A CN103288189A (en) | 2013-06-20 | 2013-06-20 | Method for disinfecting pipe network through in-situ generation of liquid chlorine by utilizing persulfate |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105457492A (en) * | 2015-12-28 | 2016-04-06 | 安徽理工大学 | Method for dechlorinating desulfurization slurry with ammonium sulfate-limestone method |
| CN110498499A (en) * | 2019-08-01 | 2019-11-26 | 同济大学 | A kind of disinfectant reducing Disinfection Byproducts in Drinking Water concentration |
| CN110502869A (en) * | 2019-07-15 | 2019-11-26 | 哈尔滨工业大学 | Ensure the benefit chlorine method of long distance water transfer Biostability of Water Quality in Network |
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| DE4324124A1 (en) * | 1992-08-04 | 1994-02-10 | Willibald Krause | Dechlorinating and neutralising water, esp. water used in control of chlorine gas escapes - comprises passing water in closed container through optional neutral (e.g. gravel) layer and then through layers of dechlorinating and neutralising substances |
| CN1633539A (en) * | 2002-01-14 | 2005-06-29 | P&W投资财产管理有限公司 | Method for sterilisation and cleaning of water supply systems, in particular in swimming and bathing pool units and device for carrying out the same |
| CN102267750A (en) * | 2011-06-24 | 2011-12-07 | 李沛泓 | SPA (Solubrious Par Aqua) water quality impact agent for swimming pool and thermal spring |
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Patent Citations (3)
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| DE4324124A1 (en) * | 1992-08-04 | 1994-02-10 | Willibald Krause | Dechlorinating and neutralising water, esp. water used in control of chlorine gas escapes - comprises passing water in closed container through optional neutral (e.g. gravel) layer and then through layers of dechlorinating and neutralising substances |
| CN1633539A (en) * | 2002-01-14 | 2005-06-29 | P&W投资财产管理有限公司 | Method for sterilisation and cleaning of water supply systems, in particular in swimming and bathing pool units and device for carrying out the same |
| CN102267750A (en) * | 2011-06-24 | 2011-12-07 | 李沛泓 | SPA (Solubrious Par Aqua) water quality impact agent for swimming pool and thermal spring |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105457492A (en) * | 2015-12-28 | 2016-04-06 | 安徽理工大学 | Method for dechlorinating desulfurization slurry with ammonium sulfate-limestone method |
| CN110502869A (en) * | 2019-07-15 | 2019-11-26 | 哈尔滨工业大学 | Ensure the benefit chlorine method of long distance water transfer Biostability of Water Quality in Network |
| CN110502869B (en) * | 2019-07-15 | 2022-07-12 | 哈尔滨工业大学 | Chlorine supplementing method for guaranteeing biological stability of water quality of long-distance water delivery pipe network |
| CN110498499A (en) * | 2019-08-01 | 2019-11-26 | 同济大学 | A kind of disinfectant reducing Disinfection Byproducts in Drinking Water concentration |
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Application publication date: 20130911 |