CN106193178B - A kind of method that water supply network water quality stability is ensured during water source switching - Google Patents
A kind of method that water supply network water quality stability is ensured during water source switching Download PDFInfo
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- CN106193178B CN106193178B CN201610634776.8A CN201610634776A CN106193178B CN 106193178 B CN106193178 B CN 106193178B CN 201610634776 A CN201610634776 A CN 201610634776A CN 106193178 B CN106193178 B CN 106193178B
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B1/00—Methods or layout of installations for water supply
- E03B1/02—Methods or layout of installations for water supply for public or like main supply for industrial use
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B7/00—Water main or service pipe systems
- E03B7/07—Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons, valves, in the pipe systems
- E03B7/071—Arrangement of safety devices in domestic pipe systems, e.g. devices for automatic shut-off
Abstract
The present invention provides a kind of method that water supply network water quality stability is ensured in water source switching, includes the water quality corrosivity Judging index at two kinds of water sources of measure, and is compared；If difference≤0.08 at new water source and the water quality corrosivity Judging index of former water flowing, directly switches new water source and supplies water；If the difference at new water source and the water quality corrosivity Judging index of former water flowing>0.08, then new water source mixed with former water flowing in the way of new water source additional proportion steps up, supply water for pipe network, until being all switched to new water source.The method of the present invention is in the case where needing to switch resource of water supply, it can ensure water supply network water stabilization, influence to the existing physics in pipeline, chemistry and microflora is small, the effectively generation of prevention " yellow water " phenomenon, it is high to the accuracy of " yellow water " occurrence risk prediction, to ensureing that water supply network water quality stability has directive significance, and convenient and easy, simple and fast.
Description
Technical field
The invention belongs to the network security transmission ＆ distribution field in drinking water treatment, is related to a kind of guarantee water supply network water stabilization
Property method, it is more particularly to a kind of under the conditions of water source switching ensure water supply network water stabilization method.
Background technology
Society and expanding economy increasingly increase the demand of water resource particularly drinking water sources, long range water transfer, sea
Water is desalinated and multi-water resources comprehensive utilization becomes the main path for solving water shortage city water resource shortage problem.However, different water
The difference of source water quality characteristic, after water source switching, water factory's water outlet enters pipe network water quality deterioration during transmission ＆ distribution, or even occurs
The risk of " yellow water (Red Water) ".
Ductwork water quality corruptions, at home and abroad have been reported that caused by related water source switching.Last century the nineties are beautiful
After local underground water is switched to the surface water of Colorado by Arizona State Tu Sang cities of state, there occurs more serious " Huang
Water " event.China Tianjin is when seasonality changes water, and after underground water is changed to earth surface water source, pipe network outlet water at tail end occurs " red
Water " phenomenon, and bacterium is exceeded in water.During generation pipe network " yellow water ", the turbidity of user terminal water outlet, colourity, total number of bacteria, iron from
The indexs such as son are possible to not up to standard, and larger shadow is caused to industrial production (printing and dyeing, battery, chemical industry etc.) and resident's daily life
Ring.For the city of multi-water resources co-supplying, it is ensured that after water source switching, stabilization of the effluent water quality in pipe network distributing system,
It is the important step of high-quality water supply of ensuring safety.Therefore, before water source switching, pipe network " yellow water " occurrence risk is predicted,
It is proposed the corresponding method for ensureing ductwork water quality and stablizing, be the key of guarantee water quality safety under the conditions of water source switching.
The above-mentioned ductwork water quality corruptions of generation are because water supply network is in During Process of Long-term Operation, since burn into deposits
Etc. reason inner-walls of duct can be formed it is metastable, using corrosive pipeline product or deposit as main component boundary layer (or
Referred to as " pipe scale ", Pipe Internal Scale).Water supply line because material, service life, convey water water quality difference, its
Also difference is larger with stability for the form composition of inner wall corrosion product, but excavates active service water supply line and take pipe scale, and analysis conduit is rotten
Erosion situation and pipe scale stability, are limited more by the sampling of tube wall internal corrosion layer, reaction complexity and influence factor in practical applications,
Direct Analysis difficulty is larger.
However, for the pipe network of service phase length, have what is formed for a long time between its tube wall and tube wall internal corrosion layer and conveying water
Chemical balance, analyzes the water quality of long-term conveying water in pipe network, can indirectly reflect pipe scale stability.Early-stage study successively proposes
Two major class discriminant indexs：One kind is mainly based upon the index of dissolution of calcium carbonate balance, bright lattice Lear saturation index such as
(Langelier Saturation Index, LSI), Lai Shi index of stability (Ryznar Stability Index, RSI), carbon
Sour calcium precipitate gesture (Calcium Carbonate Precipitation Potential, CCPP) etc.；It is another kind of, it is to be based on it
Its water quality parameter, the index for characterizing aqueous corrosion power, such as Larsen index (Larson Ration, LR).Preceding one kind discriminant index
It is mainly based upon the dynamic equilibrium whether calcium carbonate dissolved in water reaches saturation state and its a series of fouling and dissolving；Afterwards
The it is proposed of a kind of discriminant index Larsen index (LR) be based on estimation conveying water during pipe network in-situ corrosion include sulfate radical,
Influence of the inorganic anion to corrosive pipeline including chlorion and total alkalinity, it is believed that the corrosivity of water body depends in water corroding
The ratio of property component and rust inhibition component.Above-mentioned two classes discriminant index has only been investigated during conveying water and pipeline interact
The influence that chemical balance in a certain respect discharges corrosive pipeline and corrosion product, not comprehensively, especially for active service feed pipe
The pipeline section of existing pipe scale in net.Meanwhile also research points out the release of corrosion product in pipe scale except the water quality with above-mentioned index
Index, such as sulfate, chlorion, basicity, hardness have outside the Pass, also with multiple water quality index such as chlorine residue, dissolved oxygen and nitrate
It is related, and the interaction of actually conveying water and pipeline is the result of a variety of chemical balance comprehensive functions.
In conclusion existing above-mentioned index simply considers chemical balance in a certain respect to corrosive pipeline and corrosion product
The influence factor of the influence of release, it is impossible to which water supply network " yellow water " occurrence risk is, it is necessary to which synthesis is examined effectively after prediction water source switching
Examine multiple water quality parameters, can more fully Forecasting Methodology change of water quality.
In addition, be the stability of water quality after guarantee water supply network water source switching, while " yellow water " occurrence risk is predicted,
Also need to, for the larger water supply region of " yellow water " occurrence risk, carry out allotment water supply initial stage in water source switching, it is ensured that pipe network is defeated
Send the stability of water, guarantee.
The content of the invention
The purpose of the present invention is for existing public supply mains during water source switching since source quality becomes
Change, " yellow water " phenomenon may occur in course of conveying, asked for the technology existing in the prior art for reducing " yellow water " occurrence risk
Topic, there is provided to " yellow water " wind occurs for a kind of method that water supply network water quality stability is ensured in water source switching, the method for the present invention
The accuracy nearly predicted is high, and uses the method for the present invention, and " yellow water " phenomenon will not occur during water source switching, be effectively ensured
The security that pipe network supplies water, and the method for the present invention is convenient and easy, simple and fast.
To achieve the object of the present invention, one aspect of the present invention provides one kind and ensures that water supply network water quality is steady in water source switching
Qualitatively method, including the water quality corrosivity Judging index (WQCR) at new water source and former two kinds of water sources of water flowing is measured first, then
Calculate the difference (Δ WQCR) of the water quality corrosivity Judging index at two kinds of water sources.
Wherein, the former water flowing water in water supply network for water source switching.
Particularly, the water quality corrosivity Judging index (WQCR) at described two water sources measures in accordance with the following steps：
1) new water source, the water quality parameter of former water flowing are measured respectively：Chlorion (mg/L), sulfate (mg/L), nitrate (with
N is counted, mg/L), total alkalinity is (with CaCO3Meter, mg/L), total hardness is (with CaCO3Meter, mg/L), and the dissolved oxygen of the former water flowing of measure
(mg/L) and chlorine residue (mg/L)；
2) water quality parameter of step 1) measure is subjected to unit conversion, be converted into terms of mol/L；
3) water quality parameter after unit conversion is substituted into formula (I), it is logical to calculate new water source, original respectively according to formula (I)
The water quality corrosivity Judging index (WQCR) of water：
In formula (I)：
[chlorion] is new water source, the chlorine ion concentration of former water flowing, mol/L；
[sulfate] is new water source, the sulfate concentration of former water flowing, mol/L；
[nitrate] is new water source, the nitrate concentration of former water flowing, mol/L；
[basicity] is new water source, the total alkalinity of former water flowing, mol/L；
[hardness] is new water source, the total hardness of former water flowing, mol/L；
[dissolved oxygen] is the dissolved oxygen concentration of former water flowing, mol/L；
[chlorine residue] is the residual chlorine concentration of former water flowing, mol/L.
Due to dissolved oxygen and chlorine residue have direct relation with water treatment process, the present invention is counted using formula (I)
Calculate the water quality corrosivity Judging index (WQCR at new water sourceNewly) when, the dissolved oxygen (mg/L) at new water source and chlorine residue (mg/L) be in formula
Substituted into and calculated using the numerical value of former water flowing.
Wherein, water quality parameter described in step 1)：Chlorion (mg/L), sulfate (mg/L), nitrate (in terms of N, mg/
L), total alkalinity is (with CaCO3Meter, mg/L), total hardness is (with CaCO3Meter, mg/L), dissolved oxygen (mg/L) and chlorine residue (mg/L) distinguish
According to《Water and effluent monitoring analysis method (the 4th edition)》In correlation method be measured.
Especially, total alkalinity described in step 1) is (with CaCO3Meter, mg/L) according to《Water and effluent monitoring analysis method (
4 editions)》In acid-base titration be measured；Total hardness is (with CaCO3Meter, mg/L) according to《Water and effluent monitoring analysis
Method (the 4th edition)》In EDTA titrations be measured；Sulfate (mg/L), chlorion (mg/L) and nitrate (in terms of N,
Mg/L) respectively according to《Water and effluent monitoring analysis method (the 4th edition)》In the chromatography of ions be measured；The dissolved oxygen
(mg/L) according to《Water and effluent monitoring analysis method (the 4th edition)》In dissolved oxygen instrument method be measured；The chlorine residue (mg/L)
According to《Water and effluent monitoring analysis method (the 4th edition)》In N, N- diethyl-P- phenylenediamine photometries are measured.
Particularly, dissolved oxygen (mg/L) is measured using portable dissolved oxygen instrument.
Especially, the dissolved oxygen (mg/L) matches somebody with somebody dissolved oxygen probe using Portable water-quality analysis instrument (HACH, HQ40d)
(HACH, LDO101) is measured.
Particularly, further include：If the difference (Δ WQCR) of new water source and the water quality corrosivity Judging index of former water flowing≤-
0.08, then directly switch new water source, supply water for pipe network；If difference (the Δ at new water source and the water quality corrosivity Judging index of former water flowing
WQCR)>- 0.08, then new water source and former water flowing are subjected to allotment mixed processing first, using new water source and the mixing water of former water flowing
Supply water for pipe network, then step up the additional proportion at new water source, until being all switched to new water source.
Wherein, Δ WQCR=WQCRNewly—WQCRIt is former。
During difference (the Δ WQCR)≤- 0.08 of water quality corrosivity Judging index, then directly switch new water source, supply water for pipe network；
The difference (Δ WQCR) of water quality corrosivity Judging index>, it is necessary to be supplied after new water source is allocated with former water flowing for pipe network when -0.08
Water, after pipe network adaptation, is stepping up the additional proportion at new water source, until being all switched to new water source.
Particularly, it is additionally included in and uses new water source and the mixing water of former water flowing in pipe network water supply process, to measure feed pipe
Night of net stop supplying water at least 4h pipe network water outlet turbidity (NTU) and total iron (mg/L), up to water outlet turbidity (NTU) and
Total iron (mg/L) reaches《Standards for drinking water quality (GB5749-2006)》Afterwards, then the additional proportion at new water source is improved.
Wherein, the turbidity (NTU) of the water outlet, total iron (mg/L) respectively according to《Water and effluent monitoring analysis method the (the 4th
Version)》Middle correlation method is measured；Wherein measure water supply network night stop water supply 4h pipe network water outlet turbidity (NTU) and
Total iron (mg/L).
Particularly, the turbidity (NTU) of the water outlet according to《Water and effluent monitoring analysis method (the 4th edition)》In it is portable
Turbidimeter method is measured；Total iron (mg/L) according to《Water and effluent monitoring analysis method (the 4th edition)》In phenanthroline
Spectrophotometry is measured.
Particularly, it is described in the difference (Δ WQCR) of new water source and the water quality corrosivity Judging index of former water flowing more than -0.08
Allotment mixed processing carries out in accordance with the following steps：If the difference (Δ WQCR) of water quality corrosivity Judging index>0, then first will be new
20 are pressed with former water flowing in water source:80 volume ratio is mixed, and carrying out first stage mixing for pipe network supplies water, until night stops supplying
The turbidity (NTU) and total iron (mg/L) of the pipe network water outlet of water at least 4h reach《Standards for drinking water quality (GB5749-
2006)》, the additional proportion at new water source is then stepped up again, is supplied water for pipe network, until night stops supplying water at least 4h's
The turbidity (NTU) and total iron (mg/L) of pipe network water outlet reach《Standards for drinking water quality (GB5749-2006)》, follow repeatedly
Ring, until being all switched to new water source.
Especially, the additional proportion for stepping up new water source, the amplitude of the raising of new water source content is 10-20%,
Preferably 10%.
Especially, it is described during the additional proportion at new water source is stepped up, the volume ratio of new water source and former water flowing according to
Secondary is 30:70、40:60、50:50、60:40、70:30、80:20, until being all switched to new water source.
Particularly, in the difference (Δ WQCR) at new water source and the water quality corrosivity Judging index of former water flowing>- 0.08, the tune
Carried out in accordance with the following steps with mixed processing：If Δ WQCR≤0, and Δ WQCR>- 0.05 (i.e. Δ WQCR is between -0.05 to 0
Between), then new water source and former water flowing are pressed 40 first:60 volume ratio is mixed, and carrying out first stage mixing for pipe network supplies
Water, until night stops the turbidity (NTU) of the pipe network water outlet of water supply at least 4h and total iron (mg/L) reaches《Drinking Water is defended
Raw standard (GB5749-2006)》, the additional proportion for then stepping up new water source again supplies water for pipe network, until night stops supplying
The turbidity (NTU) and total iron (mg/L) of the pipe network water outlet of water at least 4h reach《Standards for drinking water quality (GB5749-
2006)》, iterative cycles, until being all switched to new water source.
Especially, the additional proportion for stepping up new water source, the amplitude of the raising of new water source content is 10-20%,
Preferably 10%.
Especially, it is described during the additional proportion at new water source is stepped up, the volume ratio of new water source and former water flowing according to
Secondary is 50:50、60:40、70:30、80:20, until being all switched to new water source.
Particularly, it is described in the difference (Δ WQCR) of new water source and the water quality corrosivity Judging index of former water flowing more than -0.08
Allotment mixed processing carries out in accordance with the following steps：If Δ WQCR<0, and (i.e. Δ WQCR is between -0.08 for Δ WQCR≤- 0.05
Between to -0.05), then new water source and former water flowing are pressed 60 first:40 volume ratio is mixed, and the first stage is carried out for pipe network
Mixing is supplied water, until night stops the turbidity (NTU) of the pipe network water outlet of water supply at least 4h and total iron (mg/L) reaches《Life drink
With water hygiene standard (GB5749-2006)》, the additional proportion at new water source is then stepped up again, is supplied water for pipe network, until
Night stops the turbidity (NTU) of the pipe network water outlet of water supply at least 4h and total iron (mg/L) reaches《Standards for drinking water quality
(GB5749-2006)》, iterative cycles, until being all switched to new water source.
Especially, the additional proportion for stepping up new water source, the amplitude of the raising of new water source content is 10-20%,
Preferably 10%.
Especially, it is described during the additional proportion at new water source is stepped up, the volume ratio of new water source and former water flowing according to
Secondary is 70:30、80:20, until being all switched to new water source.
Particularly, after 2-10 days water supply networks of water supply network first stage mixing water supply adapt to, added according still further to new water source
The method allotment mixing water that ratio steps up, carries out second stage mixing and supplies water, after 2-10 days, after water supply network adapts to, then
New water source additional proportion, iterative cycles are improved, until being all switched to new water source.
Especially, mixing water pipe network water supply 2-6 days are allocated, are preferably 3-6 days, more preferably 6 days, water supply network was fitted
Ying Hou, then new water source additional proportion is improved, iterative cycles, until being all switched to new water source.That is, new water source is often improved once
Additional proportion, water supply network water supply 2-6 days, is preferably 3-6 days, more preferably 6 days；Improved again after water supply network adaptation
The additional proportion at new water source, carries out the water supply of next stage, and water supply 2-6 days, is preferably 3-6 days, more preferably 6 days；Treat
After pipe network adapts to, then the additional proportion at new water source is improved, the repeated multiple times additional proportion for improving new water source, until being all switched to
New water source.
The additional proportion at new water source steps up to be allocated as follows：Such as：Such as led to using new water source with original
The volume ratio of water is 40:60 allotment mixing waters supply water for pipe network；After water supply network adapts to, then according to new water source and the body of former water flowing
Product is than being 50:50 allotments, supply water after mixing for pipe network；After water supply network adaptation, according still further to new water source and the volume of former water flowing
Than for 60:40 proportioning allocates new water source and former water flowing, supplies water after mixing for pipe network；After water supply network adaptation after, then according to
70:30、80:20 volume ratio steps up the additional proportion at new water source, supplies water for water supply network, until being all switched to new water
Source.
The new water source of selection and the volume ratio of former water flowing are 40 that is, if first stage mixing is supplied water:60 allotments
Mixing water, mixes water supply 2-10 days in the first stage, is preferably 2-6 days, and more preferably 3-6 days, be still more preferably 6
My god；Then it is 50 according to new water source and the volume ratio of former water flowing after water supply network adapts to:The 50 new water source of proportioning allotment leads to original
Water, carries out second stage mixing for pipe network after mixing and supplies water, second stage mixing water supply 2-10 days, is preferably 2-6 days, further
Preferably 3-6 days, be still more preferably 6 days；After water supply network adaptation, it is according still further to new water source and the volume ratio of former water flowing
60:40 proportioning allocates new water source and former water flowing, and carrying out phase III mixing after mixing for pipe network supplies water, and phase III mixing supplies
Water 2-10 days, is preferably 2-6 days, and more preferably 3-6 days, be still more preferably 6 days；After water supply network adaptation, so
It is afterwards 70 according to new water source and the volume ratio of former water flowing:30 proportioning allocates new water source and former water flowing, is carried out after mixing for pipe network
Fourth stage mixing is supplied water, and fourth stage mixing water supply 2-10 days, is preferably 2-6 days, more preferably 3-6 days, more into one
Step is preferably 6 days；It is 80 according to new water source and the volume ratio of former water flowing after water supply network adaptation:20 proportioning allocates new water
Source and former water flowing, carry out the mixing of the 5th stage for pipe network after mixing and supply water, the 5th stage mixing water supply 2-10 days, is preferably 2-6
My god, more preferably 3-6 days, be still more preferably 6 days, after water supply network adaptation, is all switched to new water source.
Wherein, the pipe network adapts to refer to that new water source supplies water with the allotment mixing water that former water flowing proportionally mixes for pipe network
Afterwards, the turbidity (NTU) and total iron (mg/L) of pipe network water outlet after water 4h of measure night stopping daily, stops using water 4h up to night
The turbidity (NTU) of pipe network water outlet and total iron (mg/L) reach afterwards《Standards for drinking water quality (GB5749-2006)》, that is, supply
Grid has adapted to.
Particularly, the turbidity (NTU) of the water outlet and total iron (mg/L) respectively according to《Water and effluent monitoring analysis method
(the 4th edition)》Middle correlation method is measured.
Especially, the turbidity (NTU) of the water outlet according to《Water and effluent monitoring analysis method (the 4th edition)》In it is portable
Turbidimeter method is measured；Total iron (mg/L) according to《Water and effluent monitoring analysis method (the 4th edition)》In phenanthroline light splitting
Photometry is measured.
Another aspect of the present invention provides a kind of method for ensureing that ductwork water quality is stablized in water source switching, including is carried out as follows
The step of：
1) water quality of the water supply network original water flowing to be switched water source is measured；
2) according to the water quality data of the former water flowing of measure, according to formula (I), the water quality corrosion sex determination for calculating former water flowing refers to
Mark (WQCRIt is former)；
3) measure the water quality at the new water source of switching；
4) according to the water quality data at the new water source of measure, the water quality corrosion sex determination that new water source is calculated according to formula (I) refers to
Mark (WQCRNewly),
Wherein, the dissolved oxygen (mg/L) at new water source and chlorine residue (mg/L) are substituted into using the numerical value of former water flowing calculates；
5) if difference (Δ WQCR)≤- 0.08 of new water source and the water quality corrosivity Judging index of former water flowing, directly switches
New water source, supplies water for pipe network；If the difference (Δ WQCR) at new water source and the water quality corrosivity Judging index of former water flowing>- 0.08, then it is first
New water source and former water flowing are first subjected to allotment mixed processing, use new water source and the mixing water of former water flowing to supply water for pipe network, then
The additional proportion at new water source is stepped up, until being all switched to new water source.
Wherein, Δ WQCR=WQCR in step 5)Newly-WQCRIt is former。
Wherein, former water flowing water quality is measured described in step 1) includes chlorion (mg/L), the sulfate of the former water flowing of measure
(mg/L), nitrate (in terms of N, mg/L), total alkalinity are (with CaCO3Meter, mg/L), total hardness is (with CaCO3Meter, mg/L), dissolved oxygen
(mg/L) and chlorine residue (mg/L)；The new source quality of measure described in step 3) includes measuring chlorion (mg/L), the sulphur at new water source
Hydrochlorate (mg/L), nitrate (in terms of N, mg/L), total alkalinity are (with CaCO3Meter, mg/L) and total hardness (with CaCO3Meter, mg/L).
Particularly, further include and the water quality parameter numerical value at the former water flowing of measure, new water source be subjected to unit conversion, be converted into
After mol/L meters, according still further to formula (I) calculate respectively new water source, former water flowing water quality corrosivity Judging index (WQCRNewly、
WQCRIt is former)。
Wherein, step 2) and 4) described in the water quality corrosivity Judging index (WQCR) at former water flowing and new water source join with water quality
Shown in several governing equations such as formula (I)：
In formula, each water quality parameter concentration is converted into mol/L and substitutes into calculating；
The dissolved oxygen (mg/L) at new water source and chlorine residue (mg/L) are substituted into using the numerical value of former water flowing to be calculated.
Wherein, the chlorion (mg/L), sulfate (mg/L), nitrate (in terms of N, mg/L), total alkalinity are (with CaCO3
Meter, mg/L), total hardness is (with CaCO3Meter, mg/L), dissolved oxygen (mg/L) and chlorine residue (mg/L) respectively according to《Water and effluent monitoring
Analysis method (the 4th edition)》In corresponding water quality parameter assay method carry out.
Particularly, the total alkalinity is (with CaCO3Meter, mg/L) according to《Water and effluent monitoring analysis method (the 4th edition)》In
Acid-base titration be measured；Total hardness is (with CaCO3Meter, mg/L) according to《Water and effluent monitoring analysis method (
4 editions)》In EDTA titrations be measured；Sulfate (mg/L), chlorion (mg/L) and nitrate (in terms of N, mg/L) are respectively
According to《Water and effluent monitoring analysis method (the 4th edition)》In the chromatography of ions be measured；The dissolved oxygen (mg/L) according to
《Water and effluent monitoring analysis method (the 4th edition)》In dissolved oxygen instrument method be measured；The chlorine residue (mg/L) according to《Water and useless
Water monitoring analysis method (the 4th edition)》In N, N- diethyl-P- phenylenediamine photometries are measured.
Wherein, mixed processing is allocated described in step 5) to include the following steps：
If 5-1) Δ WQCR>0, then it is 20 first by new water source and the volume ratio of former water flowing:80 allotment mixing waters, for pipe
Net progress first stage mixing is supplied water, until night stops the turbidity (NTU) of the pipe network water outlet of water supply at least 4h and total iron (mg/
L) reach《Standards for drinking water quality (GB5749-2006)》, the additional proportion at new water source is then stepped up again, for pipe
Net supplies water, until night stops the turbidity (NTU) of the pipe network water outlet of water supply at least 4h and total iron (mg/L) reaches《Life is drunk
Water hygiene standard (GB5749-2006)》, iterative cycles, until being all switched to new water source；
If 5-2) Δ WQCR≤0, and Δ WQCR>- 0.05 (i.e. Δ WQCR is between -0.05 to 0), then first will be by
New water source and the volume ratio of former water flowing are 40:60 allotment mixing water, carried out first stage mixing for pipe network and supplies water, until night
The turbidity (NTU) and total iron (mg/L) for stopping the pipe network water outlet of water supply at least 4h reach《Standards for drinking water quality
(GB5749-2006)》, the additional proportion at new water source is then stepped up again, is supplied water for pipe network, until night stops supplying water at least
The turbidity (NTU) and total iron (mg/L) of the pipe network water outlet of 4h reach《Standards for drinking water quality (GB5749-2006)》, instead
Multiple circulation, until being all switched to new water source；
If 5-3) Δ WQCR<0, and Δ WQCR≤- 0.05 (i.e. Δ WQCR is between -0.08 to -0.05), then first
To be 60 by new water source and the volume ratio of former water flowing:40 allotment mixing water, carries out first stage mixing for pipe network and supplies water, until
Night stops the turbidity (NTU) of the pipe network water outlet of water supply at least 4h and total iron (mg/L) reaches《Standards for drinking water quality
(GB5749-2006)》, the additional proportion at new water source is then stepped up again, is supplied water for pipe network, until night stops supplying water at least
The turbidity (NTU) and total iron (mg/L) of the pipe network water outlet of 4h reach《Standards for drinking water quality (GB5749-2006)》, instead
Multiple circulation, until being all switched to new water source.
Particularly, step 5-1), 5-2), 5-3) described in step up the additional proportion at new water source, new water source content
The amplitude of raising is 10-20%, is preferably 10%.
Especially, step 5-1) described during the additional proportion at new water source is stepped up, new water source and former water flowing
Volume ratio is followed successively by 30:70、40:60、50:50、60:40、70:30、80:20；Step 5-2) in new water source and the body of former water flowing
Product ratio is followed successively by 50:50、60:40、70:30、80:20；Step 5-3) in new water source and the volume ratio of former water flowing be followed successively by 70:
30、80:20。
Compared with prior art, the method for the present invention has the following advantages that：
1st, method of the invention is in measure and the water quality corrosivity Judging index (WQCR) at more former water flowing and new water source
On the basis of, water supply network " yellow water " occurrence risk after prediction water source switching, the pipe network region low to " yellow water " occurrence risk, directly
Switch new water source；For the high pipe network region of " yellow water " occurrence risk, supply water after new water source is allocated with former water flowing, and by
Step improves new water source additional proportion, until being all switched to new water source.By above-mentioned measure, the feelings of switching resource of water supply are being needed
Under condition, it is ensured that pipe network conveys the stability of water, guarantee.
2nd, the present invention considers more comprehensive water quality parameter, can a variety of chemical balances of concentrated expression to corrosive pipeline and corrosion
The influence of product release, so as to preferably evaluate " yellow water " occurrence risk before water source switching；And the method for the present invention evaluation is " yellow
The accuracy of water " occurrence risk is high, has highly important finger to water supply network water quality stability under the conditions of ensureing water source switching
Lead meaning.
3rd, while " yellow water " occurrence risk is predicted, it is not required to excavation active service water supply line and takes pipe scale, it is convenient and easy, simply
Quickly, the influence to the existing physics in pipeline, chemistry and microflora is small.
Embodiment
The beneficial effect for method that the present invention is further explained below by way of test example.
Embodiment 1
By taking certain surface water is new water source as an example, the former water flowing using surface water as water source is replaced.
1st, the water quality of to be switched water source region pipe network original water flowing is measured
1-1, according to《Water and effluent monitoring analysis method (the 4th edition)》In corresponding water quality parameter assay method, measure is former
The water quality parameter of water flowing, measurement result are as follows：
Wherein, measured using Portable water-quality analysis instrument (HACH, HQ40d) with dissolved oxygen probe (HACH, LDO101) molten
Solve oxygen (mg/L)；According to《Water and effluent monitoring analysis method (the 4th edition)》In acid-base titration measure total alkalinity (with
CaCO3Meter, mg/L)；According to《Water and effluent monitoring analysis method (the 4th edition)》In EDTA titration measurings total hardness (with
CaCO3Meter, mg/L)；According to《Water and effluent monitoring analysis method (the 4th edition)》In ion-chromatographic determination sulfate (mg/
L), chlorion (mg/L) and nitrate (in terms of N, mg/L)；According to《Water and effluent monitoring analysis method (the 4th edition)》In N, N-
Diethyl-P- phenylenediamine photometries are measured chlorine residue (mg/L).
《Water and effluent monitoring analysis method (the 4th edition)》For State Environmental Protection Administration《Water and effluent monitoring analysis method》
Editorial board, Wei contain writing again, and China Environmental Science Press publishes, and books ISBN is 7-80163-400-4/X230.
1-2, the water quality parameter progress unit conversion by the former water flowing of said determination, are converted into terms of mol/L；
1-3, substitute into the water quality parameter after unit conversion in formula (I), and the water quality that former water flowing is calculated according to formula (I) is rotten
Corrosion Judging index (WQCRIt is former), the water quality corrosivity Judging index (WQCR of former water flowingIt is former) result of calculation be 0.296；
In formula (I)：
[chlorion] is the chlorine ion concentration of former water flowing, mol/L；
[sulfate] is the sulfate concentration of former water flowing, mol/L；
[nitrate] is the nitrate concentration of former water flowing, mol/L；
[basicity] is the total alkalinity of former water flowing, mol/L；
[hardness] is the total hardness of former water flowing, mol/L；
[dissolved oxygen] is the dissolved oxygen concentration of former water flowing, mol/L；
[chlorine residue] is the residual chlorine concentration of former water flowing, mol/L.
2nd, the water quality at new water source is measured
2-1, according to《Water and effluent monitoring analysis method (the 4th edition)》In corresponding water quality parameter assay method, measure is new
The water quality parameter at water source, measurement result are as follows：
Due to dissolved oxygen and chlorine residue have direct relation with water treatment process, the present invention is counted using formula (I)
Calculate the water quality corrosivity Judging index (WQCR at the new water source at new water sourceNewly) when, dissolved oxygen (mg/L) and chlorine residue (mg/L) in formula
Substituted into and calculated using the numerical value of former water flowing.
For dissolved oxygen, although water source species (such as surface water, underground water) has an impact content of oxygen dissolved in water,
In water treatment procedure, water reoxygenation process under the flow regime with air contact is rapider, in the dissolved oxygen and air in water
Oxygen easily reach dissolution equilibrium, and the partial pressure of oxygen in air changes little, therefore content is relatively stablized in the oxygen in water that dispatches from the factory.Separately
On the one hand, the contents of residual chlorine in output water is determined by the dosage of disinfectant in water treatment procedure.Therefore, for same place
(i.e. identical water treatment procedure and pipeline condition) and under conditions of same season (i.e. identical water temperature), the dissolved oxygen at new water source
(mg/L) substituted into and calculated using the numerical value of former water flowing with chlorine residue (mg/L).
2-2, the water quality parameter progress unit conversion by the new water source of said determination, are converted into terms of mol/L；
2-3, substitute into the water quality parameter after unit conversion in formula (I), and the water quality that new water source is calculated according to formula (I) is rotten
Corrosion Judging index (WQCRNewly), the water quality corrosivity Judging index (WQCR at new water sourceNewly) result of calculation be 0.143；
In formula (I)：
[chlorion] be new water source chlorine ion concentration, mol/L；
[sulfate] be new water source sulfate concentration, mol/L；
[nitrate] be new water source nitrate concentration, mol/L；
[basicity] be new water source total alkalinity, mol/L；
[hardness] be new water source total hardness, mol/L；
[dissolved oxygen] be new water source dissolved oxygen concentration, mol/L；
[chlorine residue] be new water source residual chlorine concentration, mol/L.
3rd, the difference (Δ WQCR) of the water quality corrosivity Judging index at two kinds of water sources is calculated, result of calculation is -0.07；Wherein：
Δ WQCR=WQCRNewly-WQCRIt is former
WQCRNewlyFor the water quality corrosivity Judging index at new water source；
WQCRIt is formerFor the water quality corrosivity Judging index of former water flowing.
4th, allotment is supplied water
The difference (Δ WQCR) of new water source and the water quality corrosivity Judging index of former water flowing is -0.153, less than -0.08, directly
Switch new water source, supply water for pipe network.
After switching new water source water supply, within 7 days after switching, measure night every night stops with pipe network water outlet after water 4h
Turbidity (NTU) and total iron (mg/L), the turbidity (NTU) of pipe network water outlet is less than 1.0NTU, and total iron (mg/L) is less than
0.3mg/L, reaches《Standards for drinking water quality (GB5749-2006)》, " yellow water " phenomenon does not occur；Wherein water outlet is turbid
Spend (NTU) according to《Water and effluent monitoring analysis method (the 4th edition)》In portable turbidimeter method be measured；Total iron (mg/L)
According to《Water and effluent monitoring analysis method (the 4th edition)》In phenanthroline spectrophotometry row measure.
Embodiment 2
Certain surface water be new water source exemplified by, replace the former water flowing using underground water as water source.
1st, the water quality of former water flowing is measured
1-1, according to《Water and effluent monitoring analysis method (the 4th edition)》In corresponding water quality parameter assay method, measure is former
The water quality parameter of water flowing, measures the water quality parameter of former water flowing, and measurement result is as follows：
1-2, the water quality parameter progress unit conversion by the former water flowing of said determination, are converted into terms of mol/L；
1-3, substitute into the water quality parameter after unit conversion in formula (I), and the water quality that former water flowing is calculated according to formula (I) is rotten
Corrosion Judging index (WQCRIt is former), the water quality corrosivity Judging index (WQCR of former water flowingIt is former) result of calculation be 0.159；
2nd, the water quality at new water source is measured
2-1, according to《Water and effluent monitoring analysis method (the 4th edition)》In corresponding water quality parameter assay method, measure is new
The water quality parameter at water source, measurement result are as follows：
2-2, the water quality parameter progress unit conversion by the new water source of said determination, are converted into terms of mol/L；
2-3, substitute into the water quality parameter after unit conversion in formula (I), and the water quality that new water source is calculated according to formula (I) is rotten
Corrosion Judging index (WQCRNewly), the water quality corrosivity Judging index (WQCR at new water sourceNewly) result of calculation be 0.209；
The water quality corrosivity Judging index (WQCR at new water source is calculated using formula (I)Newly) when, the dissolved oxygen (mg/L) in formula
Substituted into and calculated using the numerical value of former water flowing with chlorine residue (mg/L).
3rd, the difference (Δ WQCR) of the water quality corrosivity Judging index at two kinds of water sources, result of calculation 0.051 are calculated；
The water quality corrosivity Judging index (WQCR at new water sourceNewly) water quality corrosivity Judging index (WQCR with former water flowingIt is former)
Difference be 0.05, more than -0.08, then need to be allocated at new water source and original water flowing, and step up new water source additional proportion,
Until pipe network adaptability is all switched to new water source again after improving.
4th, allotment is supplied water
4-1) the water quality corrosivity Judging index (WQCR at new water sourceNewly) water quality corrosivity Judging index with former water flowing
(WQCRIt is former) difference be more than -0.08 and more than 0：To be first 20 by new water source and the volume ratio of former water flowing:80 allotment mixing
Water, supplies water for pipe network；
4-2) after pipe network water flowing, turbidity (NTU) and total iron (mg/ of the night stopping with pipe network water outlet after water 4h are measured daily
L), wherein, the turbidity (NTU) of water outlet according to《Water and effluent monitoring analysis method (the 4th edition)》In portable turbidimeter method into
Row measure, total iron (mg/L) according to《Water and effluent monitoring analysis method (the 4th edition)》In phenanthroline spectrophotometry row survey
It is fixed；After water flowing 6 days, night stop with the turbidity (NTU) and total iron (mg/L) of pipe network water outlet after water 4h be respectively 0.68NTU (<
1.0NTU) and 0.23mg/L (<0.30mg/L), reach《Standards for drinking water quality (GB5749-2006)》, i.e., pipe network has been
Adapt to, then improve the additional proportion at new water source, it is 30 to select new water source and the volume ratio of former water flowing:70 allotment mixing water is pipe
Net supplies water；
Mixing water is allocated in the present invention to supply water for pipe network.Water supply network adaptation time is in addition to 6 days, other times such as 2-
(being preferably 2-6 days, more preferably 3-6- days, be still more preferably 6 days) is suitable for the present invention, allotment mixing within 10 days
After water supplies water for pipe network, night the stopping turbidity (NTU) of pipe network water outlet after water at least 4h and total iron are measured after water flowing daily
(mg/L), the turbidity (NTU) of the pipe network water outlet after pipe network night stopping water 4h and total iron (mg/L) reach《Drinking Water is defended
Raw standard (GB5749-2006)》Afterwards, the additional proportion at new water source is being improved, pipe network has adapted to.
4-3) new water source and the volume ratio of former water flowing are 30:After 70 allotment mixing water supplies water for pipe network, night is measured daily
Between stop using the turbidity (NTU) and total iron (mg/L) of pipe network water outlet after water 4h, after water flowing 6 days, water 4h is used in the night stopping of measure
Water outlet turbidity (NTU) and total iron (mg/L) be respectively 0.74NTU and 0.26mg/L, reach《Drinking Water health mark
Accurate (GB5749-2006)》, then the additional proportion at new water source is improved, it is 40 to select new water source and the volume ratio of former water flowing:60 tune
Supply water with mixing water for pipe network；
4-4) new water source and the volume ratio of former water flowing are 40:After 60 allotment mixing water supplies water for pipe network, night is measured daily
Between stop using the turbidity (NTU) and total iron (mg/L) of pipe network water outlet after water 4h, after water flowing 5 days, water 4h is used in the night stopping of measure
Water outlet turbidity (NTU) and total iron (mg/L) be respectively 0.82NTU and 0.28mg/L, reach《Drinking Water health mark
Accurate (GB5749-2006)》, i.e., pipe network adapts to, then improves the additional proportion at new water source, selects new water source and the volume of former water flowing
Than for 50:50 allotment mixing water supplies water for pipe network.
4-5) new water source and the volume ratio of former water flowing are 50:After 50 allotment mixing water pipe network supplies water, night is measured daily
Stop using the turbidity (NTU) and total iron (mg/L) of pipe network water outlet after water 4h, after water flowing 4 days, the night of measure stops using water 4h's
The turbidity (NTU) and total iron (mg/L) of water outlet are respectively 0.70NTU and 0.25mg/L, are reached《Standards for drinking water quality
(GB5749-2006)》, then the additional proportion at new water source is improved, it is 60 to select new water source and the volume ratio of former water flowing:40 allotment
Mixing water supplies water for pipe network；
4-6) new water source and the volume ratio of former water flowing are 60:After 40 allotment mixing water supplies water for pipe network, night is measured daily
Between stop using the turbidity (NTU) and total iron (mg/L) of pipe network water outlet after water 4h, after water flowing 3 days, measure night stops using water 4h's
The turbidity (NTU) and total iron (mg/L) of water outlet are respectively 0.67NTU and 0.23mg/L, are reached《Standards for drinking water quality
(GB5749-2006)》, then the additional proportion at new water source is improved, it is 70 to select new water source and the volume ratio of former water flowing:30 allotment
Mixing water supplies water for pipe network；
4-7) new water source and the volume ratio of former water flowing are 70:After 30 allotment mixing water supplies water for pipe network, night is measured daily
Between stop using the turbidity (NTU) and total iron (mg/L) of pipe network water outlet after water 4h, after water flowing 3 days, measure night stops using water 4h's
The turbidity (NTU) and total iron (mg/L) of water outlet are respectively 0.56NTU and 0.19mg/L, are reached《Standards for drinking water quality
(GB5749-2006)》, then the additional proportion at new water source is improved, it is 80 to select new water source and the volume ratio of former water flowing:20 allotment
Mixing water supplies water for pipe network；
4-8) new water source and the volume ratio of former water flowing are 80:After 20 allotment mixing water supplies water for pipe network, night is measured daily
Between stop using the turbidity (NTU) and total iron (mg/L) of pipe network water outlet after water 4h, after water flowing 2 days, measure night stops using water 4h's
The turbidity (NTU) and total iron (mg/L) of water outlet are respectively 0.52NTU and 0.17mg/L, are reached《Standards for drinking water quality
(GB5749-2006)》, then the additional proportion at new water source is improved, all it is switched to new water source and supplies water for pipe network.
Embodiment 3
By taking surface water is new water source as an example, replace with the former water flowing of surface water and groundwater mixing contributing region.
1st, the water quality of former water flowing is measured
1-1, according to《Water and effluent monitoring analysis method (the 4th edition)》In corresponding water quality parameter assay method, measure is former
The water quality parameter of water flowing, measurement result are as follows：
1-2, the water quality parameter progress unit conversion by the former water flowing of said determination, are converted into terms of mol/L；
1-3, substitute into the water quality parameter after unit conversion in formula (I), and the water quality that former water flowing is calculated according to formula (I) is rotten
Corrosion Judging index (WQCRIt is former), the water quality corrosivity Judging index (WQCR of former water flowingIt is former) result of calculation be 0.225；
2nd, the water quality at new water source is measured
2-1, according to《Water and effluent monitoring analysis method (the 4th edition)》In corresponding water quality parameter assay method, measure is new
The water quality parameter at water source, measurement result are as follows：
2-2, the water quality parameter progress unit conversion by the new water source of said determination, are converted into terms of mol/L；
2-3, substitute into the water quality parameter after unit conversion in formula (I), and the water quality that new water source is calculated according to formula (I) is rotten
Corrosion Judging index (WQCRNewly), the water quality corrosivity Judging index (WQCR at new water sourceNewly) result of calculation be 0.16；
3rd, the difference (Δ WQCR) of the water quality corrosivity Judging index at two kinds of water sources is calculated, result of calculation is -0.064；
The water quality corrosivity Judging index (WQCR at new water sourceNewly) water quality corrosivity Judging index (WQCR with former water flowingIt is former)
Difference be -0.064, more than -0.08, and less than -0.05, then need to be allocated at new water source and original water flowing, and step up
New water source additional proportion, until pipe network adaptability is all switched to new water source again after improving.
4th, allotment is supplied water
4-1) the water quality corrosivity Judging index (WQCR at new water sourceNewly) water quality corrosivity Judging index with former water flowing
(WQCRIt is former) difference be more than -0.08 and less than -0.05：To be first 60 by new water source and the volume ratio of former water flowing:40 allotment mixing
Water, supplies water for pipe network；
4-2) after pipe network water flowing, turbidity (NTU) and total iron (mg/ of the night stopping with pipe network water outlet after water 4h are measured daily
L), after water flowing 5 days, night stop with the turbidity (NTU) and total iron (mg/L) of pipe network water outlet after water 4h be respectively 0.72NTU (<
1.0NTU) and 0.26mg/L (<0.30mg/L), reach《Standards for drinking water quality (GB5749-2006)》, i.e., pipe network has been
Adapt to, then improve the additional proportion at new water source, it is 70 to select new water source and the volume ratio of former water flowing:30 allotment mixing water is pipe
Net supplies water；
4-3) new water source and the volume ratio of former water flowing are 70:After 30 allotment mixing water supplies water for pipe network, night is measured daily
Between stop using the turbidity (NTU) and total iron (mg/L) of pipe network water outlet after water 4h, after water flowing 5 days, measure night stops using water 4h's
The turbidity (NTU) and total iron (mg/L) of water outlet are respectively 0.69NTU and 0.25mg/L, are reached《Standards for drinking water quality
(GB5749-2006)》, then the additional proportion at new water source is improved, it is 80 to select new water source and the volume ratio of former water flowing:20 allotment
Mixing water supplies water for pipe network；
4-4) new water source and the volume ratio of former water flowing are 80:After 20 allotment mixing water supplies water for pipe network, night is measured daily
Between stop using the turbidity (NTU) and total iron (mg/L) of pipe network water outlet after water 4h, after water flowing 4 days, measure night stops using water 4h's
The turbidity (NTU) and total iron (mg/L) of water outlet are respectively 0.58NTU and 0.20mg/L, are reached《Standards for drinking water quality
(GB5749-2006)》, then the additional proportion at new water source is improved, all it is switched to new water source and supplies water for pipe network.
Embodiment 4
Certain surface water be new water source exemplified by, replace the former water flowing using underground water as water source
1st, the water quality of former water flowing is measured
1-1, according to《Water and effluent monitoring analysis method (the 4th edition)》In corresponding water quality parameter assay method, measure is former
The water quality parameter of water flowing, measurement result are as follows：
1-2, the water quality parameter progress unit conversion by the former water flowing of said determination, are converted into terms of mol/L；
1-3, substitute into the water quality parameter after unit conversion in formula (I), and the water quality that former water flowing is calculated according to formula (I) is rotten
Corrosion Judging index (WQCRIt is former), the water quality corrosivity Judging index (WQCR of former water flowingIt is former) result of calculation be 0.195；
2nd, the water quality at new water source is measured
2-1, according to《Water and effluent monitoring analysis method (the 4th edition)》In corresponding water quality parameter assay method, measure is new
The water quality parameter at water source, measurement result are as follows：
2-2, the water quality parameter progress unit conversion by the new water source of said determination, are converted into terms of mol/L；
2-3, substitute into the water quality parameter after unit conversion in formula (I), and the water quality that new water source is calculated according to formula (I) is rotten
Corrosion Judging index (WQCRNewly), the water quality corrosivity Judging index (WQCR at new water sourceNewly) result of calculation be 0.155；
3rd, the difference (Δ WQCR) of the water quality corrosivity Judging index at two kinds of water sources is calculated, result of calculation is -0.039；
The water quality corrosivity Judging index (WQCR at new water sourceNewly) water quality corrosivity Judging index (WQCR with former water flowingIt is former)
Difference be -0.039, more than -0.05 and less than 0, then need to be allocated at new water source and original water flowing, and step up new water source
Additional proportion, until pipe network adaptability is all switched to new water source again after improving.
4th, allotment is supplied water
4-1) the water quality corrosivity Judging index (WQCR at new water sourceNewly) water quality corrosivity Judging index with former water flowing
(WQCRIt is former) difference be more than -0.05 and less than 0：To be first 40 by new water source and the volume ratio of former water flowing:60 allotment mixing waters,
Supply water for pipe network；
4-2) after pipe network water flowing, turbidity (NTU) and total iron (mg/ of the night stopping with pipe network water outlet after water 4h are measured daily
L), after water flowing 7 days, night stop with the turbidity (NTU) and total iron (mg/L) of pipe network water outlet after water 4h be respectively 0.78NTU (<
1.0NTU) and 0.27mg/L (<0.30mg/L), reach《Standards for drinking water quality (GB5749-2006)》, i.e., pipe network has been
Adapt to, then improve the additional proportion at new water source, it is 50 to select new water source and the volume ratio of former water flowing:50 allotment mixing water is pipe
Net supplies water；
4-3) new water source and the volume ratio of former water flowing are 50:After 50 allotment mixing water pipe network supplies water, night is measured daily
Stop using the turbidity (NTU) and total iron (mg/L) of pipe network water outlet after water 4h, after water flowing 6 days, the night of measure stops using water 4h's
The turbidity (NTU) and total iron (mg/L) of water outlet are respectively 0.79NTU and 0.27mg/L, are reached《Standards for drinking water quality
(GB5749-2006)》, then the additional proportion at new water source is improved, it is 60 to select new water source and the volume ratio of former water flowing:40 allotment
Mixing water supplies water for pipe network；
4-4) new water source and the volume ratio of former water flowing are 60:After 40 allotment mixing water supplies water for pipe network, night is measured daily
Between stop using the turbidity (NTU) and total iron (mg/L) of pipe network water outlet after water 4h, after water flowing 5 days, measure night stops using water 4h's
The turbidity (NTU) and total iron (mg/L) of water outlet are respectively 0.66NTU and 0.23mg/L, are reached《Standards for drinking water quality
(GB5749-2006)》, then the additional proportion at new water source is improved, it is 70 to select new water source and the volume ratio of former water flowing:30 allotment
Mixing water supplies water for pipe network；
4-5) new water source and the volume ratio of former water flowing are 70:After 30 allotment mixing water supplies water for pipe network, night is measured daily
Between stop using the turbidity (NTU) and total iron (mg/L) of pipe network water outlet after water 4h, after water flowing 4 days, measure night stops using water 4h's
The turbidity (NTU) and total iron (mg/L) of water outlet are respectively 0.57NTU and 0.20mg/L, are reached《Standards for drinking water quality
(GB5749-2006)》, then the additional proportion at new water source is improved, it is 80 to select new water source and the volume ratio of former water flowing:20 allotment
Mixing water supplies water for pipe network；
4-6) new water source and the volume ratio of former water flowing are 80:After 20 allotment mixing water supplies water for pipe network, night is measured daily
Between stop using the turbidity (NTU) and total iron (mg/L) of pipe network water outlet after water 4h, after water flowing 3 days, measure night stops using water 4h's
The turbidity (NTU) and total iron (mg/L) of water outlet are respectively 0.49NTU and 0.16mg/L, are reached《Standards for drinking water quality
(GB5749-2006)》, then the additional proportion at new water source is improved, all it is switched to new water source and supplies water for pipe network.
During water source switching, the turbidity (NTU) and total iron (mg/L) of the water outlet of pipe network are monitored all the time, are not occurred " yellow
Water " phenomenon.
Although above-mentioned elaborate the present invention, however, the present invention is not limited thereto, those skilled in the art can
Modified with principle according to the present invention, therefore, the various modifications that all principles according to the invention carry out all should be understood to
Fall into protection scope of the present invention.
Claims (8)
1. the method for water supply network water quality stability is ensured during a kind of water source switching, it is characterized in that, including
The water quality corrosivity Judging index (WQCR) at new water source and former two kinds of water sources of water flowing is measured first, wherein, described two water
The water quality corrosivity Judging index (WQCR) in source is measured in accordance with the following steps：
1) new water source, the water quality parameter of former water flowing are measured respectively：Chlorion (mg/L), sulfate (mg/L), nitrate
(in terms of N, mg/L), total alkalinity are (with CaCO3Meter, mg/L) and total hardness (with CaCO3Meter, mg/L), and measure former logical
The dissolved oxygen (mg/L) of water and chlorine residue (mg/L)；
2) water quality parameter of step 1) measure is subjected to unit conversion, be converted into terms of mol/L；
3) water quality parameter after unit conversion is substituted into formula (I), it is logical to calculate new water source, original respectively according to formula (I)
The water quality corrosivity Judging index (WQCR) of water, calculates the water quality corrosivity Judging index (WQCR at new water sourceNewly) when, it is new in formula
The dissolved oxygen (mg/L) at water source and chlorine residue (mg/L) are substituted into using the numerical value of former water flowing to be calculated：
(Ⅰ)
In formula (I)：
[chlorion] is new water source, the chlorine ion concentration of former water flowing, mol/L；
[sulfate] is new water source, the sulfate concentration of former water flowing, mol/L；
[nitrate] is new water source, the nitrate concentration of former water flowing, mol/L；
[basicity] is new water source, the total alkalinity of former water flowing, mol/L；
[hardness] is new water source, the total hardness of former water flowing, mol/L；
[dissolved oxygen] is the dissolved oxygen concentration of former water flowing, mol/L；
[chlorine residue] is the residual chlorine concentration of former water flowing, mol/L；
Then the difference (Δ WQCR) of the water quality corrosivity Judging index at two kinds of water sources, wherein Δ WQCR=WQCR are calculatedNewly—
WQCRIt is former；If difference (Δ WQCR)≤- 0.08 at new water source and the water quality corrosivity Judging index of former water flowing, directly switching are new
Water source, supplies water for pipe network；If the difference (Δ WQCR) at new water source and the water quality corrosivity Judging index of former water flowing>- 0.08, then
New water source and former water flowing are subjected to allotment mixed processing first, use new water source and the mixing water of former water flowing to supply water for pipe network, so
The additional proportion for stepping up new water source afterwards supplies water for pipe network, until being all switched to new water source.
2. the method as described in claim 1, it is characterized in that water quality parameter described in step 1)：Chlorion (mg/L), sulfuric acid
Salt (mg/L), nitrate (in terms of N, mg/L), total alkalinity are (with CaCO3Meter, mg/L) and total hardness (with CaCO3Meter,
Mg/L), dissolved oxygen (mg/L) and chlorine residue (mg/L) respectively according to《Water and effluent monitoring analysis method (the 4th edition)》Middle phase
Induction method is measured.
3. the method as described in claim 1, it is characterized in that, it is additionally included in and uses the mixing water at new water source and former water flowing as pipe network
In water supply process, the night for measuring water supply network stops supply water at least turbidity (NTU) of the pipe network water outlet of 4 h and total iron
(mg/L), until the turbidity (NTU) and total iron (mg/L) of water outlet reach《Standards for drinking water quality (GB5749-
2006)》Afterwards, then the additional proportion at new water source is improved.
4. the method as described in claim 1, it is characterized in that：Difference at new water source and the water quality corrosivity Judging index of former water flowing
(ΔWQCR) >- 0.08, the allotment mixed processing carries out in accordance with the following steps：If the difference of water quality corrosivity Judging index
(ΔWQCR) >0, then new water source and former water flowing are pressed 20 first:80 volume ratio is mixed, and the first stage is carried out for pipe network
Mixing is supplied water, until night stops the water supply at least turbidity (NTU) of the pipe network water outlet of 4 h and total iron (mg/L) and reaches
《Standards for drinking water quality (GB5749-2006)》, the additional proportion for then stepping up new water source again is pipe network confession
Water, until night stopping is supplied water, at least turbidity (NTU) of the pipe network water outlet of 4 h and total iron (mg/L) reaches《Life drink
With water hygiene standard (GB5749-2006)》, iterative cycles, until being all switched to new water source.
5. the method as described in claim 1, it is characterized in that：Difference at new water source and the water quality corrosivity Judging index of former water flowing
(ΔWQCR) >- 0.08, the allotment mixed processing carries out in accordance with the following steps：If Δ WQCR≤0, and Δ WQCR>
- 0.05, then new water source and former water flowing are pressed 40 first:60 volume ratio is mixed, and carrying out first stage mixing for pipe network supplies
Water, until night stopping is supplied water, at least turbidity (NTU) of the pipe network water outlet of 4 h and total iron (mg/L) reaches《Life drink
With water hygiene standard (GB5749-2006)》, the additional proportion for then stepping up new water source again supplies water for pipe network, until night
Between stop supply water at least turbidity (NTU) of the pipe network water outlet of 4 h and total iron (mg/L) reach《Drinking Water health mark
Accurate (GB5749-2006)》, iterative cycles, until being all switched to new water source.
6. the method as described in claim 1, it is characterized in that：Difference at new water source and the water quality corrosivity Judging index of former water flowing
(ΔWQCR) >- 0.08, the allotment mixed processing carries out in accordance with the following steps：If Δ WQCR<0, and Δ WQCR≤
- 0.05, then new water source and former water flowing are pressed 60 first:40 volume ratio is mixed, and carrying out first stage mixing for pipe network supplies
Water, until night stopping is supplied water, at least turbidity (NTU) of the pipe network water outlet of 4 h and total iron (mg/L) reaches《Life drink
With water hygiene standard (GB5749-2006)》, the additional proportion for then stepping up new water source again supplies water for pipe network, until night
Between stop supply water at least turbidity (NTU) of the pipe network water outlet of 4 h and total iron (mg/L) reach《Drinking Water health mark
Accurate (GB5749-2006)》, iterative cycles, until being all switched to new water source.
7. the method as described in claim 3,4,5 or 6, it is characterized in that, the additional proportion for stepping up new water source, new water
The amplitude of the raising of source content is 10-20%.
8. the method as described in claim 3,4,5 or 6, it is characterized in that, the additional proportion for stepping up new water source, new water
The amplitude of the raising of source content is 10%.
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| CN109001391B (en) * | 2018-06-28 | 2021-07-02 | 北京市自来水集团有限责任公司技术研究院 | Method for judging water quality change reason of water supply network water source switching area |
| CN109813647B (en) * | 2019-03-01 | 2021-03-12 | 中国科学院生态环境研究中心 | Stability judging and regulating method for corrosion layer of drinking water pipe network |
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