CN1155758C - Method based on intermediate water channel for determing impurity concentration and water supply network - Google Patents

Abstract

The present invention discloses a method for determining impurity concentration based on an intermediate water channel, and a water network. Firstly, needed water quantity when each unit fully adopts fresh water is calculated; the water saving potential of the whole network is calculated; all water use units are ordered according to the limit outlet concentration of the units from small concentration to large concentration; maximum water use quantities are accumulated according to the ordered sequence, and then, the difference value of the accumulated value and the water saving potential is calculated; when the absolute value of the difference value is minimum, the initial concentration of each component of an intermediate water channel is determined by the maximum value of the outlet concentration of each component of all the units in the process of accumulation; the obtained initial concentration is used for building a network, and the concentration of the intermediate water channel is adjusted according to the consumption condition of the water in the intermediate water channel. The present invention is characterized in that the intermediate water channel is arranged in the network to prevent the water use units from being directly connected, the design and the control of the water network are simplified, and a network structure with large elasticity is obtained.

Description

Based on internal water main impurity concentration definite method and network of rivers network

One, technical field

The invention belongs to the procedures system integrated technology, particularly a kind of method and internal water main network structure of determining based on the internal water main impurity concentration.

Two, background technology

Present network of rivers network structure is directly to link to each other with pipeline between each unit, and the method for designing that is adopted mainly contains two kinds: diagrammatic representation (folder point method) and mathematical programming approach.These two kinds of methods, the multicomponent impurity system to large-scale all can not guarantee to obtain optimal solution.And for the many large-scale network of rivers networks of water use sector, have network of rivers network too complicated, be not easy to the shortcoming moving and control, in producing the water yield of a water use sector, when water quality condition changes, the operation of other water use sector will be influenced, if regulated, water-saving result is descended with fresh water.More than the shortcoming of two kinds of methods be: 1. design work difficulty relatively: utilization diagrammatic representation (a folder point method) needs to draw the folder point diagram, this is a very complicated job for multicomponent system, and the network that designs need break the loop in the hope of simplifying, and the quality that this work is finished depends on designer's experience to a great extent; Mathematical programming approach not only operand is big and can not guarantee optimum; 2. for large scale system, the network that obtains is very complicated, and is restive; 3. network resilience deficiency: directly link to each other with pipeline between each unit and mean the respective change of local change needs integral body, for the process of an actual motion, this is worthless.

Three, summary of the invention

The objective of the invention is to overcome the shortcoming of above-mentioned prior art, provide a kind of can simplify water Network Design and control and make network have bigger elasticity (the established technology parameter within the specific limits change and the unit of increase and decrease some can not change whole network) method and the network of rivers network determined based on the internal water main impurity concentration.

For the present invention that achieves the above object adopts the method for determining based on the internal water main impurity concentration be:

The needed water yield, the i.e. maximum water supply volume F of this unit when 1) at first calculating each unit and all adopt fresh water _{W, i} ^Max

$F_{W,i}^{\mathrm{Max}}=\underset{s}{\mathrm{Max}}\frac{M_{i,s}}{C_{\mathrm{OUT},i,s}^{\mathrm{Max}}}$

Be each component pollutant burden M _{I, s}With its limit exit concentration C _{OUT, i, s} ^MaxThe maximum value of ratio, s is the group branch, i is a unit number;

2) the water saving potential Δ F of the whole network of calculating _W, i.e. the difference of the maximum water supply volume of whole network and target water supply volume;

3) limit exit concentration is ascending sorts by it to each water use sector;

4) by the order that sequences to maximum water supply volume F _{W, i} ^MaxAdd up, whenever add up and once calculate accumulated value and water saving potential Δ F _WDifference, when the absolute value of this difference reaches hour, the maximum value that participates in each component exit concentration of all unit of adding up has determined the initial concentration of each component of internal water main;

5),, adjust the concentration of internal water main according to the status of profit and loss of water in the internal water main with the initial concentration tectonic network that obtains:

Wherein the accumulation water yield of internal water main is F _{M, cum}:

F _M，cum＝F _IN，M-F _OUT，M

F _{IN, M}And F _{OUT, M}Be respectively into, go out the rate of flow of water of internal water main.

The construction process of network of rivers network is:

1) determines the concentration of internal water main;

2) calculate the water saving factor η of each water use sector _i:

If a. $C_{\mathrm{IN},i,s}^{\mathrm{Max}}=0$ At least one component s sets up, perhaps $C_{\mathrm{OUT},i,s}^{\max }\≤C_{M,s}$ All components s is set up, wherein, C _{M, s}Be internal water main s kind component concentrations, C _{IN, i, s} ^MaxBe the limit inlet concentration of s kind component in i the unit:

η then _i=0

B. for other situation:

${\mathrm{\η}}_i=\frac{F_{W,i}^{\mathrm{Max}}-F_{W,i}^T}{F_{M,i}^T}$

F _{W, i} ^T, F _{M, i} ^TBe respectively that the theoretical water diversion of i unit from fresh water channel and internal water main is set behind the internal water main, calculate by following formula:

①. $C_{\mathrm{IN},i,s}^{\mathrm{Max}}\≥C_{M,s}$ All components s is set up:

$F_{M,i}^T=\underset{s}{\mathrm{Max}}\frac{M_{i,s}}{C_{\mathrm{OUT},i,s}^{\mathrm{Max}}-C_{M,s}}$

$F_{W,i}^T=0$

②. $C_{\mathrm{IN},i,s}^{\mathrm{Max}}<C_{M,s}$ Set up at least one component s

Order $d_i=\underset{s}{\mathrm{Max}}\frac{C_{M,s}}{C_{\mathrm{IN},i,s}^{\mathrm{Max}}}$

$F_i=\underset{s}{\mathrm{Max}}\frac{M_{i,s}}{C_{\mathrm{OUT},i,s}^{\mathrm{Max}}-\frac{C_{M,s}}{d_i}}$

F in the formula _iBe the flow rate of the water of i unit,

Then: $F_{M,i}^T=\frac{1}{d_i}{F}_i$

$F_{W,i}^T=\frac{d_i-1}{d_i}{F}_i$

3) descending by the water saving factor for each unit distributes water inlet, preferentially from middle water channel diversion, if deficiency then additional by fresh water channel, thus whole water network set up.

Another characteristics of the present invention are: the flow rate of each unit water inlet is distributed promptly the actual water diversion F from fresh water channel and internal water main _{W, i}, F _{M, i}Computational methods are:

a.η _i≤0

$F_{W,i}=F_{W,i}^{\mathrm{Max}}$

F _M，i＝0

b.η _i＞0

By calculating the theoretical water diversion of each unit, then F from fresh water channel and internal water main _{M, i} ^TWith the accumulation water yield F in the internal water main _{M, cum}Compare, if $F_{M,i}^T\&le;F_{M,\mathrm{cum}},$ Then actual water diversion equals theoretical water diversion; If $F_{M,i}^T>F_{M,\mathrm{cum}},$ Then calculate F by following formula _{M, i}With F _{W, i}:

F _M，i＝F _M，cum

$F_{W,i}=\underset{s}{\mathrm{Max}}\frac{M_{i,s}-F_{M,\mathrm{cum}}(C_{\mathrm{OUT},i,s}^{\mathrm{Max}}-C_{M,s})}{C_{\mathrm{OUT},i,s}^{\mathrm{Max}}}.$

Because the present invention has adopted the method for determining based on the internal water main impurity concentration, determined the impurity of internal water main, by being set in network, internal water main avoided directly linking to each other between the water use sector, water Network Design and control have been simplified, obtain having bigger flexible network structure, and obtained water-saving result preferably.

Four, description of drawings

Accompanying drawing is the network of rivers network schematic diagram that the present invention is based on internal water main.

Five, the specific embodiment

Below in conjunction with accompanying drawing the present invention is described in further detail.

Determining of internal water main concentration:

The needed water yield, the i.e. maximum water supply volume F of this unit when 1) at first calculating each unit and all adopt fresh water _{W, i} ^Max(i is a unit number):

$F_{W,i}^{\mathrm{Max}}=\underset{s}{\mathrm{Max}}\frac{M_{i,s}}{C_{\mathrm{OUT},i,s}^{\mathrm{Max}}}$

Be each component pollutant burden M _{I, s}With its limit exit concentration C _{OUT, i, s} ^MaxThe maximum value of ratio, s is the group branch; Wherein pollutant burden is meant the quality that needs the pollutant that removes in the unit in the unit interval; The limit is advanced, and exit concentration is determined jointly by a series of possible factor usually: minimum mass transfer force, and maxima solubility is avoided the equipment flow rate of deposition of solid, and the equipment foam stops up, corrosion etc.

2) the water saving potential Δ F of the whole network of calculating _W, i.e. the difference of the maximum water supply volume of whole network (each unit maximum water supply volume sum) and target water supply volume (water supply volume when the total system wastewater recycle rate reaches maximum);

3) limit exit concentration is ascending sorts by it to each water use sector;

4) by the order that sequences to maximum water supply volume F _{W, i} ^MaxAdd up, whenever add up and once calculate accumulated value and water saving potential Δ F _WDifference, when the absolute value of this difference reaches hour, the maximum value that participates in each component exit concentration of all unit of adding up has determined the initial concentration of each component of internal water main;

With the initial concentration tectonic network that obtains, be the size of the internal water main accumulation water yield according to the status of profit and loss of water in the internal water main, adjust the concentration of internal water main:

The accumulation water yield F of internal water main wherein _{M, cum}:

F _M，cum＝F _IN，M-F _OUT，M

F _{IN, M}And F _{OUT, M}Be respectively into, go out the rate of flow of water of internal water main.Network of rivers network building method:

1) determines the concentration of internal water main;

2) calculate the water saving factor η of each water use sector _i:

If a. $C_{\mathrm{IN},i,s}^{\mathrm{Max}}=0$ Set up at least one component s, perhaps $C_{\mathrm{OUT},i,s}^{\max }\&le;C_{M,s}$ All components s is set up, wherein C _{M, s}Be internal water main s kind component concentrations, C _{IN, i, s} ^MaxBe the limit inlet concentration of s kind component in i the unit:

η then _i=0

B. for other situation:

${\mathrm{\&eta;}}_i=\frac{F_{W,i}^{\mathrm{Max}}-F_{W,i}^T}{F_{M,i}^T}$

F _{W, i} ^T, F _{M, i} ^TBe respectively that the theoretical water diversion of i unit from fresh water channel and internal water main is set behind the internal water main, calculate by following formula:

①. $C_{\mathrm{IN},i,s}^{\mathrm{Max}}\&GreaterEqual;C_{M,s}$ All components s is set up:

$F_{M,i}^T=\underset{s}{\mathrm{Max}}\frac{M_{i,s}}{C_{\mathrm{OUT},i,s}^{\mathrm{Max}}-C_{M,s}}$

$F_{W,i}^T=0$

②. $C_{\mathrm{IN},i,s}^{\mathrm{Max}}<C_{M,s}$ Set up at least one component s

Order $d_i=\underset{s}{\mathrm{Max}}\frac{C_{M,s}}{C_{\mathrm{IN},i,s}^{\mathrm{Max}}}$

$F_i=\underset{s}{\mathrm{Max}}\frac{M_{i,s}}{C_{\mathrm{OUT},i,s}^{\mathrm{Max}}-\frac{C_{M,s}}{d_i}}$

F in the formula _iBe the flow rate of the water of i unit,

Then: $F_{M,i}^T=\frac{1}{d_i}{F}_i$

$F_{W,i}^T=\frac{d_i-1}{d_i}{F}_i$

3) descending by the water saving factor for each unit distributes water inlet, preferentially from middle water channel diversion, if deficiency then additional by fresh water channel, thus whole water network set up.

The flow rate of each unit water inlet is distributed promptly the actual water diversion F from fresh water channel and internal water main _{W, i}, F _{W, i}Computational methods are as follows:

a.η _i≤0

$F_{W,i}=F_{W,i}^{\mathrm{Max}}$

F _m，i＝0

b.η _i＞0

By calculating the theoretical water diversion of each unit, then F from fresh water channel and internal water main _{M, i} ^TWith the accumulation water yield F in the internal water main _{M, cum}Compare, if $F_{M,i}^T\&le;F_{M,\mathrm{cum}},$ Then actual water diversion equals theoretical water diversion; If $F_{M,i}^T>F_{M,\mathrm{cum}},$ Then calculate F by following formula _{M, i}With F _{W, i}:

F _M，i＝F _M，cum

$F_{W,i}=\underset{s}{\mathrm{Max}}\frac{M_{i,s}-F_{M,\mathrm{cum}}(C_{\mathrm{OUT},i,s}^{\mathrm{Max}}-C_{M,s})}{C_{\mathrm{OUT},i,s}^{\mathrm{Max}}}.$

The water saving factor is meant that a certain water use sector introduces the fresh water amount that the unit water yield can be saved from middle water channel.The water saving factor is for a certain water use sector, the water-saving result that the water of the unit introducing equivalent internal water main that the water saving factor is big more reaches is good more, so the water of internal water main should preferentially be used by the bigger unit of the water saving factor, particularly under the situation of its water shortage.

Referring to accompanying drawing, the present invention includes fresh water channel 1, internal water main 2, waste way 3, its concentration is respectively C _W, C _M, C _E, the accumulation water yield is respectively F _W, Δ F _M, F _ERepresent each water use sector with the square frame that indicates numeral in the drawings, the limit inlet concentration of this each component of water use sector is more than or equal to the respective concentration of square frame left side water channel, be lower than the respective concentration of square frame the right water channel, represent the import and export stream thigh of each water use sector with arrow.

1) if after network design is finished, water has residue in the internal water main 2, then can in the unit that supplies water to internal water main 2, reduce the higher and fresh water of limit exit concentration and amount to the unit of consumption near internal water main 2 surplus waters (amounting to) by the ability of drawing pollutant, with the maximum value of each concentration of component of remaining water source as each component concentrations of internal water main after upgrading.Set up network once more and make comparisons with original network with the value after upgrading, the few person's of fresh water consumption internal water main concentration is ultimate density.

2) if after network design is finished, water has shortage in the internal water main 2, need replenish with fresh water, then can be not to the unit that internal water main 2 supplies water from former, the selection limit exit concentration is near a unit of internal water main 2 concentration, allow it supply water, to increase the water yield of internal water main 2 to internal water main 2.Maximum value with all each concentration of component of watering behind this unit of increase is upgraded back internal water main 2 each component concentrations the most.Set up network once more and make comparisons with original network with the value after upgrading, the few person's of fresh water consumption internal water main 2 concentration are ultimate density.

3) if the water in the internal water main uses up just, this moment, initial value was final value.

Be provided with fresh water channel 1 in the network of the network of rivers, internal water main 2 and waste way 3, so-called internal water main 2 is meant the water channel of impurity concentration between fresh water and waste discharge in the water, it comes from the discharge of wastewater than low impurity concentration of having of some water use sectors, is used for the water use sector of other available water than high impurity concentration again.Based on the network of rivers network structure of middle water channel, by one or more internal water mains 2 are set in water system, all water use sectors all link to each other with some water channels in fresh water channel 1, internal water main 2, the waste way 3 exactly, from the some of them water intaking, to one of them draining.As seen, based on the network of rivers network system of middle water channel, can the simplified design scheme, operate easily with water quality and control.

For each water use sector, if its " water saving factor " greater than 0, then can be from middle water channel diversion, insufficient section replenishes with fresh water; If its " water saving factor " is less than or equal to 0, then can only be from fresh water channel diversion.If each component exit concentration of a certain unit all is less than or equal to the concentration of internal water main respective components, then the water outlet of this unit can be used as the water inlet of internal water main, and the water outlet of remaining element enters waste way.Advancing of each unit, exit concentration need be regulated with fresh water and advance exit concentration so that it is no more than the limit.

Adopt the network of rivers network with internal water main structure in industrial enterprise, its key is to determine the impurity concentration of internal water main number and internal water mains at different levels.Because each water use sector has different requirements to the water yield and water quality in the industrial enterprise.Have only the correct impurity concentration of determining water channel, could under the least possible water channel, obtain big as far as possible water-saving result.

Claims (3)

1, the method for determining based on the internal water main impurity concentration is characterized in that:

The needed water yield, the i.e. maximum water supply volume F of this unit when 1) at first calculating each unit and all adopt fresh water _{W, i} ^Max

$F_{W,i}^{\mathrm{Max}}=\underset{s}{\mathrm{Max}}\frac{M_{i,s}}{C_{\mathrm{OUT},i,s}^{\mathrm{Max}}}$

Be each component pollutant burden M _{I, s}With its limit exit concentration C _{OUT, i, s} ^MaxThe maximum value of ratio, s is the group branch, i is a unit number;

2) the water saving potential Δ F of the whole network of calculating _W, i.e. the difference of the maximum water supply volume of whole network and target water supply volume;

3) limit exit concentration is ascending sorts by it to each water use sector;

4) by the order that sequences to maximum water supply volume F _{W, i} ^MaxAdd up, whenever add up and once calculate accumulated value and water saving potential Δ F _WDifference, when the absolute value of this difference reaches hour, the maximum value that participates in each component exit concentration of all unit of adding up has determined the initial concentration of each component of internal water main;

5),, adjust the concentration of internal water main according to the status of profit and loss of water in the internal water main with the initial concentration tectonic network that obtains:

Wherein the accumulation water yield of internal water main is F _{M, cum}:

F _M，cum＝F _IN，M-F _OUT，M

F _{IN, M}And F _{OUT, M}Be respectively into, go out the rate of flow of water of internal water main.

2, the network of rivers network that makes up based on the definite method of internal water main impurity concentration according to claim 1 is characterized in that:

1) determines the concentration of internal water main;

2) calculate the water saving factor η of each water use sector _i:

If a. $C_{\mathrm{IN},i,s}^{\mathrm{Max}}=0$ At least one component s sets up, perhaps $C_{\mathrm{OUT},i,s}^{\max }\&le;C_{M,s}$ All components s is set up, wherein, C _{M, s}Be internal water main s kind component concentrations, C _{IN, i, s} ^MaxBe the limit inlet concentration of s kind component in i the unit:

η then _i=0

B. for other situation:

${\mathrm{\&eta;}}_i=\frac{F_{W,i}^{\mathrm{Max}}-F_{W,i}^T}{F_{M,i}^T}$

F _{W, i} ^T, F _{M, i} ^TBe respectively that the theoretical water diversion of i unit from fresh water channel and internal water main is set behind the internal water main, calculate by following formula:

①. $C_{\mathrm{IN},i,s}^{\mathrm{Max}}\&GreaterEqual;C_{M,s}$ All components s is set up:

$F_{M,i}^T=\underset{s}{\mathrm{Max}}\frac{M_{i,s}}{C_{\mathrm{OUT},i,s}^{\mathrm{Max}}-C_{M,s}}$

$F_{W,i}^T=0$

②. $C_{\mathrm{IN},i,s}^{\mathrm{Max}}<C_{M,s}$ Set up at least one component s

Order $d_i=\underset{s}{\mathrm{Max}}\frac{C_{M,s}}{C_{\mathrm{IN},i,s}^{\mathrm{Max}}}$

$F_i=\underset{s}{\mathrm{Max}}\frac{M_{i,s}}{C_{\mathrm{OUT},i,s}^{\mathrm{Max}}-\frac{C_{M,s}}{d_i}}$

F in the formula _iBe the flow rate of the water of i unit,

Then: $F_{M,i}^T=\frac{1}{d_i}{F}_i$

$F_{W,i}^T=\frac{d_i-1}{d_i}{F}_i$

3) descending by the water saving factor for each unit distributes water inlet, preferentially from middle water channel diversion, if deficiency then additional by fresh water channel, thus whole water network set up.

3, the network of rivers according to claim 2 network is characterized in that: the flow rate of said each unit water inlet is distributed promptly the actual water diversion F from fresh water channel and internal water main _{W, i}, F _{M, i}Computational methods are:

a.?η _i≤0

$F_{W,i}=F_{W,i}^{\mathrm{Max}}$

F _M，i＝0

b.η _i＞0

By calculating the theoretical water diversion of each unit, then F from fresh water channel and internal water main _{M, i} ^TWith the accumulation water yield F in the internal water main _{M, cum}Compare, if $F_{M,i}^T\&le;F_{M,\mathrm{cum}},$ Then actual water diversion equals theoretical water diversion; If $F_{M,i}^T>F_{M,\mathrm{cum}},$ Then calculate F by following formula _{M, i}With F _{W, i}:

F _M，i＝F _M，cum

$F_{W,i}=\underset{s}{\mathrm{Max}}\frac{M_{i,s}-F_{M,\mathrm{cum}}(C_{\mathrm{OUT},i,s}^{\mathrm{Max}}-C_{M,s})}{C_{\mathrm{OUT},i,s}^{\mathrm{Max}}}.$