CN104731060A - Sewage treatment energy-saving control method based on three-variable three-dimensional table - Google Patents
Sewage treatment energy-saving control method based on three-variable three-dimensional table Download PDFInfo
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- G05B19/41875—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by quality surveillance of production
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Abstract
The invention discloses a sewage treatment energy-saving control method based on a three-variable three-dimensional table. According to the sewage treatment energy-saving control method based on the three-variable three-dimensional table, the output frequency of air blowers is adjusted according to the change of the sewage inflow rate, the water inflow chemical oxygen demand and the water effluent chemical oxygen demand deviation. The sewage treatment energy-saving control method based on the three-variable three-dimensional table comprises the steps that the three-dimensional table with the gradually increasing sewage inflow rate Q, the gradually increasing water inflow chemical oxygen demand P and the gradually increasing water effluent chemical oxygen demand deviation delta C used as the three variables, and the corresponding theoretical number n of working air blowers and the theoretical output frequency values (please see the specification for the symbol) of the air blowers are increased or decreased along with the increasing or decreasing of the gradually increasing sewage inflow rate Q, the gradually increasing water inflow chemical oxygen demand P and the gradually increasing water effluent chemical oxygen demand deviation delta C; the current water inflow rate Q', the current water inflow chemical oxygen demand P' and the current water effluent chemical oxygen demand C are obtained regularly; the water effluent chemical oxygen demand deviation delta C is calculated according to the current water effluent chemical oxygen demand deviation C and a water chemical oxygen demand discharging standard value; the current theoretical number n of working air blowers and the current theoretical output frequency values (please see the specification for the symbol) of the air blowers are obtained by positioning the current water inflow rate Q', the current water inflow chemical oxygen demand P' and the water effluent chemical oxygen demand deviation delta C in the three-dimensional table, and then the number n' of actually-working air blowers and the actual output frequency of the air blowers are adjusted in real time. According to the sewage treatment energy-saving control method based on the three-variable three-dimensional table, the frequency and the number of the air blowers can be adjusted intelligently, and thus the situation that the sewage treatment capacity is not high enough due to the fact that the frequency of the air blowers is too low or waste is caused due to the fact that frequency of the air blowers is too high is avoided.
Description
Technical field
The present invention relates to a kind of energy-saving control method used in wastewater treatment situation.More particularly, the present invention relates to a kind of wastewater treatment energy-saving control method based on ternary three-dimensional table be used in wastewater treatment situation.
Background technology
It is high that the high energy consumption of municipal sewage treatment causes sewage treatment facility operation cost on the one hand, also exacerbates energy crisis and the environmental pollution of China's present stage on the other hand.Along with sewage treatment plant is on the increase, the energy consumption of sewage treatment plant also more and more receives the concern of people.The new technology of various energy-saving consumption-reducing must be studied by sewage treatment plant, reaches reduction cost of sewage disposal with this, increases economic efficiency and the object of environmental benefit.
In conventional municipal sewage plant operating cost, the electricity charge account for the over half of cost, and wherein fan blower power consumption accounts for 60 ~ 70% of sewage treatment plant's power consumption.Implement energy-saving and cost-reducing, for reduction Sewage Plant operating cost, to alleviate current energy source in short supply significant, needs to control fan blower and regulate to adapt to operating condition for this reason.At present, part fan blower works, without any conservation measures with fixing power frequency; Part fan blower adopts the adjustment air quantity of air intake valve, air-out valve with power frequency throttle valve adjustment, electric energy is consumed in a large number on plate washer, its energy consumption is large, operational efficiency is low, negative effect is many.And variable-frequency control technique, stepless speed regulation can be realized, its structure is simple, start steadily, dependable performance, obvious energy conservation, energy-saving consumption-reducing can be reached, reduce the object of operating cost.But more existing employing founding mathematical models or intelligent algorithm are carried out variable frequency adjustment and are realized energy-conservation method, great majority compare and theorize, a lot of practical problems can be produced in the practice process being applied to engineering, shake breathed heavily by such as blower fan, instrument accuracy of detection requires length high, retardation time, complicated operation etc., thus have impact on its use in engineering.And adopt the control algolithms such as PID to carry out the feature that cannot adapt to sewage disposal process biochemical reaction complexity regulated, cause effluent quality to fluctuate large.
Summary of the invention
An object of the present invention is to solve at least the problems referred to above and/or defect, and the advantage will illustrated at least is below provided.
A further object of the invention is to provide a kind of method setting up ternary three-dimensional table, it can set up three-dimensional table using flow of inlet water Q, water inlet chemical oxygen demand of water body P and water outlet chemical oxygen demand (COD) deviation delta C as ternary, realize the accurate control to sewage drainage, energy-efficient effect can be played in engineering, solve the problem that existing theoretical method is difficult to practical application.
A further object of the invention is to provide a kind of wastewater treatment energy-saving control method based on ternary three-dimensional table, realize close-loop feedback to control, can better effluent quality be ensured, take into full account the undulatory property of water condition and technique, under the prerequisite that ensure that effluent quality, achieve energy-saving and cost-reducing.
In order to realize according to these objects of the present invention and other advantage, provide a kind of wastewater treatment energy-saving control method based on ternary three-dimensional table, for the output frequency of the change reasonable adjusting fan blower according to the discharge of sewage, wastewater influent chemical oxygen demand of water body and water outlet chemical oxygen demand of water body deviation, comprise the following steps:
1) set up with the flow of inlet water Q increased gradually respectively, water inlet chemical oxygen demand of water body P and the water outlet chemical oxygen demand (COD) deviation delta C three-dimensional table n that is ternary, wherein, and
Along with flow of inlet water Q and water inlet chemical oxygen demand of water body P and water outlet chemical oxygen demand of water body deviation delta C increase gradually or reduce, the theoretical work number of units n of corresponding fan blower increases gradually or reduces;
Along with flow of inlet water Q, water inlet chemical oxygen demand of water body P and water outlet chemical oxygen demand of water body deviation delta C increase gradually or reduce, the theoretical output frequency value of corresponding fan blower
increase gradually or reduction;
2) regularly intercept current flow of inlet water Q ', as advancing water chemical oxygen demand of water body P ' and water outlet chemical oxygen demand (COD) C simultaneously;
3) according to the current water outlet chemical oxygen demand (COD) C and setting value C intercepted
0mathematic interpolation current water outlet chemical oxygen demand of water body deviate Δ C, wherein said setting value C
0for chemical oxygen demand of water body emission compliance value; Wherein, C
0for with " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) for according to manually setting;
4) in described three-dimensional table n, carry out cross bearing according to the current described flow of inlet water Q ' intercepted and current described water inlet chemical oxygen demand of water body P ' and obtain current fan blower theoretical work number of units n;
5) in described three-dimensional table n, carry out according to current described flow of inlet water Q ', current described water inlet chemical oxygen demand of water body P ' and water outlet chemical oxygen demand of water body deviate Δ C the theoretical output frequency value that three-dimensional localization obtains described fan blower
6) according to the current fan blower theoretical work number of units n of acquisition and the theoretical output frequency value of fan blower
the output frequency of real work number of units n ' and fan blower is adjusted in real time.
Preferably, wherein, when real work number of units n '=1 of fan blower, and the theoretical output frequency value of described fan blower is obtained according to three-dimensional table n
time, the actual operating frequency of fan blower enforces 0.6f, the theoretical work number of units n=1 of fan blower, and wherein, f is fan blower maximum frequency values.
Preferably, wherein, when real work number of units n '>=2 of fan blower, and the theoretical output frequency value of described fan blower is obtained according to three-dimensional table
time, the theoretical work number of units n=n '-1 of fan blower, the real work number of units of adjustment fan blower quantitatively reduces 1 at the fan blower of original duty, repeats step 2 afterwards) ~ 6), wherein, f is fan blower maximum frequency values.
Preferably, wherein, when real work number of units n '>=1 of fan blower, and the theoretical output frequency value of described fan blower is obtained according to three-dimensional table
time, the actual operating frequency of fan blower is adjusted to the theoretical output frequency value of described fan blower
the theoretical work number of units n=n ' of fan blower;
When real work number of units n '>=1 of fan blower, and obtain the theoretical output frequency value of described fan blower according to three-dimensional table
time, the actual operating frequency of fan blower enforces f, the theoretical work number of units n=n ' of fan blower, and wherein, f is fan blower maximum frequency values.
Preferably, wherein, when fan blower number of units n '>=1 of real work, and the theoretical output frequency value of described fan blower is obtained according to three-dimensional table
when being greater than 1.1 times of the maximum frequency values f of fan blower, the theoretical work number of units n=n '+1 of fan blower, the real work number of units of adjustment fan blower quantitatively increases by 1 at the fan blower of original duty, and wherein, f is fan blower maximum frequency values.
Preferably, wherein, position in three-dimensional table n with water outlet chemical oxygen demand of water body deviation delta C according to actual fan blower work number of units n ', by intercepting when advancing water chemical oxygen demand of water body P ' brings in three-dimensional table n, by the maximal value P of P ' with three-dimensional table n
nmaxcompare, if P ' > is P
nmax, the real work number of units of adjustment fan blower quantitatively increases by 1 at the fan blower of original duty, and wherein, the concrete grammar of location is n '=n,
wherein Δ C
0for artificial setting value.
Preferably, wherein, position in three-dimensional table n with water outlet chemical oxygen demand of water body deviation delta C according to actual fan blower work number of units n ', current for intercepting flow of inlet water Q ' is brought in three-dimensional table n, by the maximal value Q of Q ' with three-dimensional table n
nmaxcompare, if Q ' > is Q
nmax, the real work number of units of adjustment fan blower quantitatively increases by 1 at the fan blower of original duty, and wherein, the concrete grammar of location is n '=n,
wherein Δ C
0for artificial setting value.
Preferably, wherein, when fan blower number of units n '>=2 of real work, position in three-dimensional table n with water outlet chemical oxygen demand of water body deviation delta C according to actual fan blower work number of units n ', current for intercepting flow of inlet water Q ' is brought in three-dimensional table n, by the maximal value Q of Q ' with three-dimensional table n
(n-1) maxcompare, if Q ' < is Q
(n-1) max, the real work number of units of adjustment fan blower quantitatively reduces 1 at the fan blower of original duty, and wherein localization method is n '=n,
wherein Δ C
0for artificial setting value.
Preferably, wherein, the theoretical output frequency value of described fan blower
obtained by algorithm, be specially:
Wherein:
for in three-dimensional table n submeter l, the i-th row, jth arrange corresponding blower frequency value; f
nfor base frequency in three-dimensional table n, f
n=0.6f;
for the actual increase of blower frequency in three-dimensional table n step-length; θ
ij (n)for step-length increases coefficient; Δ f
nfor the basic step size increments of three-dimensional table (n); N ', N represent total line number, columns in three-dimensional table n-1,
wherein Δ C
0for artificial setting value, [i+j-(N '+N)/2] represents that in three-dimensional table n, the capable j row of i, apart from the step-length number of base frequency in three-dimensional table n, namely increase several step-length, establish (N '+N)/2=1 in three-dimensional table 1 on base frequency; K is instrument coefficient, and described instrument parameter is 0.9 ~ 1.1; Part corresponding when being n that three-dimensional table n is fan blower theoretical number of units corresponding in three-dimensional table; Part corresponding when being n-1 that three-dimensional table n-1 is fan blower theoretical number of units corresponding in three-dimensional table.
Preferably, wherein, when the maximum frequency values f of fan blower is 50Hz, it is 0 ~ 1600t/h that separate unit fan blower can bear flow of inlet water Q, and water inlet chemical oxygen demand of water body P is 0 ~ 400mg/L.
The present invention at least comprises following beneficial effect:
1, using water outlet chemical oxygen demand of water body deviation as one of control inputs amount, realize close-loop feedback and control, comparatively opened loop control can better ensure effluent quality;
2, determine according to turnover water quality situation the optimum frequency that fan blower runs, under the prerequisite that ensure that effluent quality, achieve energy-saving and cost-reducing;
3, the design of three-dimensional table takes into full account the undulatory property of water condition and technique, the adjustment repeatedly of the blower frequency easily caused when avoiding setting value to be single value, and then makes overall system control more reasonable;
4, can control blower frequency flexibly according to amount of inlet water, water inlet chemical oxygen demand (COD) and water outlet chemical oxygen demand of water body deviation, solving blower frequency can not intake dynamic change and make the optimum problem strained in time with reality;
5, energy-efficient effect can be played in engineering, solve the problem that existing theoretical method is difficult to practical application;
6, each Parameter adjustable, flexible operation, solves the problem that some process operations are inflexible, mechanical;
7, simple to operate, control accuracy is high.
Part is embodied by explanation below by other advantage of the present invention, target and feature, part also will by research and practice of the present invention by those skilled in the art is understood.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet based on the wastewater treatment energy-saving control method of ternary three-dimensional table in one embodiment of the present of invention;
What Fig. 2 illustrated is the structural drawing that the present invention's entirety controls;
Fig. 3 is the structural representation of wastewater treatment energy-saving control method of the present invention control system used.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail, can implement according to this with reference to instructions word to make those skilled in the art.
Fig. 1 shows according to a kind of way of realization of the present invention, shows the wastewater treatment energy-saving control method based on ternary three-dimensional table.Comprising:
1) set up with the flow of inlet water Q increased gradually respectively, water inlet chemical oxygen demand of water body P and the water outlet chemical oxygen demand (COD) deviation delta C three-dimensional table n that is ternary, wherein, and
Along with flow of inlet water Q and water inlet chemical oxygen demand of water body P and water outlet chemical oxygen demand of water body deviation delta C increase gradually or reduce, the theoretical work number of units n of corresponding fan blower increases gradually or reduces;
Along with flow of inlet water Q, water inlet chemical oxygen demand of water body P and water outlet chemical oxygen demand of water body deviation delta C increase gradually or reduce, the theoretical output frequency value of corresponding fan blower
increase gradually or reduction;
2) regularly intercept current flow of inlet water Q ', as advancing water chemical oxygen demand of water body P ' and water outlet chemical oxygen demand (COD) C simultaneously;
3) according to the current water outlet chemical oxygen demand (COD) C and setting value C intercepted
0mathematic interpolation current water outlet chemical oxygen demand of water body deviate Δ C, wherein said setting value C
0for chemical oxygen demand of water body emission compliance value; Wherein, C
0for with " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) for according to manually setting;
4) in described three-dimensional table n, carry out cross bearing according to the current described flow of inlet water Q ' intercepted and current described water inlet chemical oxygen demand of water body P ' and obtain current fan blower theoretical work number of units n;
5) in described three-dimensional table n, carry out according to current described flow of inlet water Q ', current described water inlet chemical oxygen demand of water body P ' and water outlet chemical oxygen demand of water body deviate Δ C the theoretical output frequency value that three-dimensional localization obtains described fan blower
6) according to the current fan blower theoretical work number of units n of acquisition and the theoretical output frequency value of fan blower
the output frequency of real work number of units n ' and fan blower is adjusted in real time.
A kind of implementation of the wastewater treatment energy-saving control method based on ternary three-dimensional table in such scheme is: when real work number of units n '=1 of fan blower, and obtains the theoretical output frequency value of described fan blower according to three-dimensional table n
time, the actual operating frequency of fan blower enforces 0.6f, the theoretical work number of units n=1 of fan blower, and wherein, f is fan blower maximum frequency values.
A kind of implementation of the wastewater treatment energy-saving control method based on ternary three-dimensional table in such scheme is: when real work number of units n '>=2 of fan blower, and obtains the theoretical output frequency value of described fan blower according to three-dimensional table
time, the theoretical work number of units n=n '-1 of fan blower, the real work number of units of adjustment fan blower quantitatively reduces 1 at the fan blower of original duty, repeats step 2 afterwards) ~ 6), wherein, f is fan blower maximum frequency values.
A kind of implementation of the wastewater treatment energy-saving control method based on ternary three-dimensional table in such scheme is: when real work number of units n '>=1 of fan blower, and obtains the theoretical output frequency value of described fan blower according to three-dimensional table
time, the actual operating frequency of fan blower is adjusted to the theoretical output frequency value of described fan blower
the theoretical work number of units n=n ' of fan blower;
When real work number of units n '>=1 of fan blower, and obtain the theoretical output frequency value of described fan blower according to three-dimensional table
time, the actual operating frequency of fan blower enforces f, the theoretical work number of units n=n ' of fan blower, and wherein, f is fan blower maximum frequency values.
A kind of implementation of the wastewater treatment energy-saving control method based on ternary three-dimensional table in such scheme is: when fan blower number of units n '>=1 of real work, and obtains the theoretical output frequency value of described fan blower according to three-dimensional table
when being greater than 1.1 times of the maximum frequency values f of fan blower, the theoretical work number of units n=n '+1 of fan blower, the real work number of units of adjustment fan blower quantitatively increases by 1 at the fan blower of original duty, and wherein, f is fan blower maximum frequency values.
A kind of implementation of the wastewater treatment energy-saving control method based on ternary three-dimensional table in such scheme is: position in three-dimensional table n with water outlet chemical oxygen demand of water body deviation delta C according to actual fan blower work number of units n ', by intercepting when advancing water chemical oxygen demand of water body P ' brings in three-dimensional table n, by the maximal value P of P ' with three-dimensional table n
nmaxcompare, if P ' > is P
nmax, the real work number of units of adjustment fan blower quantitatively increases by 1 at the fan blower of original duty, and wherein, the concrete grammar of location is n '=n,
wherein Δ C
0for artificial setting value.
A kind of implementation of the wastewater treatment energy-saving control method based on ternary three-dimensional table in such scheme is: position in three-dimensional table n with water outlet chemical oxygen demand of water body deviation delta C according to actual fan blower work number of units n ', current for intercepting flow of inlet water Q ' is brought in three-dimensional table n, by the maximal value Q of Q ' with three-dimensional table n
nmaxcompare, if Q ' > is Q
nmax, the real work number of units of adjustment fan blower quantitatively increases by 1 at the fan blower of original duty, and wherein, the concrete grammar of location is n '=n,
wherein Δ C
0for artificial setting value.
A kind of implementation of the wastewater treatment energy-saving control method based on ternary three-dimensional table in such scheme is: when fan blower number of units n '>=2 of real work, position in three-dimensional table n with water outlet chemical oxygen demand of water body deviation delta C according to actual fan blower work number of units n ', current for intercepting flow of inlet water Q ' is brought in three-dimensional table n, by the maximal value Q of Q ' with three-dimensional table n
(n-1) maxcompare, if Q ' < is Q
(n-1) max, the real work number of units of adjustment fan blower quantitatively reduces 1 at the fan blower of original duty, and wherein localization method is n '=n,
wherein Δ C
0for artificial setting value.
A kind of implementation of the wastewater treatment energy-saving control method based on ternary three-dimensional table in such scheme is: the theoretical output frequency value of described fan blower
obtained by algorithm, be specially:
Wherein:
for in three-dimensional table n submeter l, the i-th row, jth arrange corresponding blower frequency value; f
nfor base frequency in three-dimensional table n; f
n=0.6f;
for the actual increase of blower frequency in three-dimensional table n step-length; θ
ij (n)for step-length increases coefficient; Δ f
nfor the basic step size increments of three-dimensional table (n); N ', N represent total line number, columns in three-dimensional table n-1,
Δ C
0for artificial setting value, [i+j-(N '+N)/2] represents that in three-dimensional table n, the capable j row of i, apart from the step-length number of base frequency in three-dimensional table n, namely increase several step-length, establish (N '+N)/2=1 in three-dimensional table 1 on base frequency; K is instrument coefficient, and described instrument parameter is 0.9 ~ 1.1; Part corresponding when being n that three-dimensional table n is fan blower theoretical number of units corresponding in three-dimensional table; Part corresponding when being n-1 that three-dimensional table n-1 is fan blower theoretical number of units corresponding in three-dimensional table.
A kind of implementation of the wastewater treatment energy-saving control method based on ternary three-dimensional table in such scheme is: when the maximum frequency values f of fan blower is 50Hz, it is 0 ~ 1600t/h that separate unit fan blower can bear flow of inlet water Q, and water inlet chemical oxygen demand of water body P is 0 ~ 400mg/L.
Wherein, l distributes adjustable
Water outlet COD setting value is value C
0, it is as shown in the table for the distribution of l value, wherein C
0, Δ C all can carry out individual character adjustment according to water factory's actual conditions.As shown in table 1.
Table 1 l distributes
Wherein, water outlet chemical oxygen demand of water body deviation delta C=C-C
0,
1 integer getting described ratio.
< example 1>
With the maximum frequency of fan blower for 50Hz, 50,000 tons of sewage treatment plants, fan blower real work number of units is 2 is example.
The detailed process of concrete frequency modulation or tune fan blower number of units is:
1, in host computer, set up the flow of inlet water Q to increase gradually respectively, water inlet chemical oxygen demand of water body P and water outlet chemical oxygen demand (COD) deviation delta C be ternary three-dimensional table 2-submeter 2 (as shown in table 2), wherein Δ C=2 Δ C
0, 1=2, wherein, along with flow of inlet water Q and water inlet chemical oxygen demand of water body P and water outlet chemical oxygen demand of water body deviation delta C increase gradually or reduce, the theoretical work number of units n of corresponding fan blower increases gradually or reduces; Along with flow of inlet water Q, water inlet chemical oxygen demand of water body P and water outlet chemical oxygen demand of water body deviation delta C increase gradually or reduce, the theoretical output frequency value of corresponding fan blower
increase gradually or reduction;
2, in host computer, input the fan blower quantity 2 of current operating state, host computer will be adjusted to ternary three-dimensional table 2-submeter 2 automatically, current flow of inlet water Q ', current chemical oxygen demand of water body P ' that intelligent controller collection is regularly intercepted by feed water flow gauge, water inlet chemical oxygen demand detection instrument and water outlet chemical oxygen demand detection instrument simultaneously and by the water outlet chemical oxygen demand (COD) C under current two fan blowers and ongoing frequency, according to the current water outlet chemical oxygen demand (COD) C and setting value C of intercepting
0mathematic interpolation current water outlet chemical oxygen demand of water body deviate Δ C, as shown in table 2, Δ C=2 Δ C
0, 1=2;
And be uploaded to host computer, host computer is according to intelligent controller collection and the current flow of inlet water Q ' uploaded and obtain current fan blower theoretical work number of units n when advancing water chemical oxygen demand of water body P ' carries out cross bearing at ternary three-dimensional table 2-submeter 2, carries out according to current described flow of inlet water Q ', current described water inlet chemical oxygen demand of water body P ' and water outlet chemical oxygen demand of water body deviate Δ C the theoretical output frequency value that three-dimensional localization obtains described fan blower in described three-dimensional table n
according to the current fan blower theoretical work number of units n of acquisition and the theoretical output frequency value of fan blower
the output frequency of real work number of units n ' and fan blower is adjusted in real time, comprises following several situation:
First by current chemical oxygen demand of water body P ' and current flow of inlet water Q ' respectively with the P in three-dimensional table 2-submeter 2
2maxand Q
2maxcompare:
(1) current for intercepting chemical oxygen demand of water body P ' is brought in three-dimensional table 2-submeter 2, by the maximal value P of P ' with three-dimensional table 2
2maxcompare, if P ' > is P
2max, the real work number of units of starting controller adjustment fan blower quantitatively increases by 1 at the fan blower of original duty;
(2) current for intercepting flow of inlet water Q ' is brought in three-dimensional table 2-submeter 2, by the maximal value Q of Q ' with three-dimensional table 2
2maxcompare, if Q ' > is Q
2max, the real work number of units of starting controller adjustment fan blower quantitatively increases by 1 at the fan blower of original duty;
(3) current for intercepting flow of inlet water Q ' is brought in three-dimensional table 2-submeter 2, by the maximal value Q of Q ' with three-dimensional table 1
1maxcompare, if Q ' < is Q
2max, the real work number of units of starting controller adjustment fan blower quantitatively reduces 1 at the fan blower of original duty;
If meet P ' > P simultaneously
2maxand Q
1max≤ Q ' < Q
2maxtime, then the theoretical output frequency value of fan blower is calculated according to ternary three-dimensional table 2
with fan blower theoretical work number of units n, be divided into following several situation:
If a obtains the theoretical output frequency value of fan blower according to ternary three-dimensional table 2-submeter 2
the real work number of units of starting controller adjustment fan blower quantitatively reduces 1 at the fan blower of original duty.
B, to obtain the theoretical output frequency value of described fan blower according to ternary three-dimensional table 2-submeter 2
time, the actual operating frequency of fan blower is adjusted to the theoretical output frequency value of fan blower by the intelligent controller frequency converter controlled in fan blower
the theoretical work number of units of fan blower is 2.
C, to obtain the theoretical output frequency value of fan blower according to ternary three-dimensional table 2-submeter 2
time, the intelligent controller frequency converter forced draft blower controlled in fan blower performs the actual operating frequency of 50Hz, and the theoretical work number of units of fan blower is 2;
D, to obtain the theoretical output frequency value of fan blower according to ternary three-dimensional table 2-submeter 2
time, the real work number of units of starting controller adjustment fan blower quantitatively increases by 1 at the fan blower of original duty.
Table 2 50,000 tons of sewage treatment plants-blower variable frequency speed governing three-dimensional table 2-submeter 2
1: represent after "/" oblique line that fan blower is actual and answer running frequency, when calculating blower frequency and be greater than 50Hz and being less than 55Hz, run by 50Hz, namely separate unit fan blower runs with maximum frequency.
2: represent after "/" oblique line that fan blower is actual and answer running frequency, when calculating blower frequency and being greater than 55Hz, force to increase a fan blower, now every platform fan blower runs with 30Hz.
< example 2>
With the maximum frequency of fan blower for 50Hz, fan blower real work number of units is n is example.
The detailed process of concrete frequency modulation or tune fan blower number of units is:
1, in host computer, set up the flow of inlet water Q to increase gradually respectively, water inlet chemical oxygen demand of water body P and the water outlet chemical oxygen demand (COD) deviation delta C three-dimensional table n (as shown in table 7) that is ternary, wherein, along with flow of inlet water Q and water inlet chemical oxygen demand of water body P and water outlet chemical oxygen demand of water body deviation delta C increase gradually or reduce, the theoretical work number of units n of corresponding fan blower increases gradually or reduces, and the theoretical work number of units n of corresponding fan blower increases gradually or reduces; Along with flow of inlet water Q, water inlet chemical oxygen demand of water body P and water outlet chemical oxygen demand of water body deviation delta C increase gradually or reduce, the theoretical output frequency value of corresponding fan blower
increase gradually or reduction;
2, in host computer, input the fan blower quantity n of current operating state, host computer will be adjusted to ternary three-dimensional table n automatically, current flow of inlet water Q ', current chemical oxygen demand of water body P ' that intelligent controller collection is regularly intercepted by feed water flow gauge, water inlet chemical oxygen demand detection instrument and water outlet chemical oxygen demand detection instrument simultaneously and by the water outlet chemical oxygen demand (COD) C under current two fan blowers and ongoing frequency, according to the current water outlet chemical oxygen demand (COD) C and setting value C of intercepting
0mathematic interpolation current water outlet chemical oxygen demand of water body deviate Δ C, the three-dimensional table that different n value is corresponding different, as table 3 ~ 6, the corresponding different different three-dimensional table corresponding to n and 1 and three-dimensional table submeter respectively; Wherein, C
0for with " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) for according to manually setting;
And be uploaded to host computer, host computer is according to intelligent controller collection and the current flow of inlet water Q ' uploaded and obtain current fan blower theoretical work number of units n when advancing water chemical oxygen demand of water body P ' carries out cross bearing in ternary three-dimensional table 2, carries out according to fan blower theoretical work number of units n and water outlet chemical oxygen demand of water body deviate Δ C the theoretical output frequency value that three-dimensional localization obtains described fan blower in described three-dimensional table n
, according to the current fan blower theoretical work number of units n of acquisition and the theoretical output frequency value of fan blower
the output frequency of real work number of units n ' and fan blower is adjusted in real time, comprises following several situation:
First by current chemical oxygen demand of water body P ' and current flow of inlet water Q ' respectively with the P in three-dimensional table n
nmaxand Q
nmaxcompare:
(1) current for intercepting chemical oxygen demand of water body P ' is brought in three-dimensional table n, by the maximal value P of P ' with three-dimensional table n
nmaxcompare, if P ' > is P
nmax, the real work number of units of starting controller adjustment fan blower quantitatively increases by 1 at the fan blower of original duty;
(2) current for intercepting flow of inlet water Q ' is brought in three-dimensional table n, by the maximal value Q of Q ' with three-dimensional table n
nmaxcompare, if Q ' > is Q
nmax, the real work number of units of starting controller adjustment fan blower quantitatively increases by 1 at the fan blower of original duty;
(3) current for intercepting flow of inlet water Q ' is brought in three-dimensional table n, by the maximal value Q of Q ' with three-dimensional table n-1
(n-1) maxcompare, if Q ' < is Q
(n-1) max, the real work number of units of starting controller adjustment fan blower quantitatively reduces 1 at the fan blower of original duty;
If meet P ' > P simultaneously
nmaxand Q
(n-1) max≤ Q ' < Q
nmaxtime, then the theoretical output frequency value of fan blower is calculated according to ternary three-dimensional table n
with fan blower theoretical work number of units n, be divided into following several situation:
If a obtains the theoretical output frequency value of fan blower according to ternary three-dimensional table n
the real work number of units of starting controller adjustment fan blower quantitatively reduces 1 at the fan blower of original duty.
B, to obtain the theoretical output frequency value of described fan blower according to ternary three-dimensional table n
time, the actual operating frequency of fan blower is adjusted to the theoretical output frequency value of fan blower by the intelligent controller frequency converter controlled in fan blower
the theoretical work number of units of fan blower is n.
C, obtain the theoretical output frequency value of fan blower according to ternary three-dimensional table n
time, the intelligent controller frequency converter forced draft blower controlled in fan blower performs the actual operating frequency of 50Hz, and the theoretical work number of units of fan blower is n;
D, obtain the theoretical output frequency value of fan blower according to ternary three-dimensional table n
time, the real work number of units of starting controller adjustment fan blower quantitatively increases by 1 at the fan blower of original duty.
Table 3 three-dimensional table 1-submeter 1
Table 4 three-dimensional table 1-submeter-1
Table 5 three-dimensional table 1-submeter l
Table 6 three-dimensional table 2-submeter l
Table 7 three-dimensional table n-submeter l
The described overall control structure figure based on the wastewater treatment energy-saving control method of ternary three-dimensional table as shown in Figure 2,
Obtain the ternary three-dimensional table based on expert knowledge library according to practical operation experience, formed by the ternary three-dimensional table closed-loop system of flow of inlet water, water inlet chemical oxygen demand (COD), water outlet chemical oxygen demand (COD) deviation co-controlling blower frequency; Secondly, utilize wastewater influent flowmeter, water inlet chemical oxygen demand detection instrument obtain wastewater influent flow, water inlet chemical oxygen demand (COD) content obtain water outlet chemical oxygen demand (COD) by water outlet chemical oxygen demand detection instrument and calculate water chemistry oxygen demand measured value and setting value deviation; Then, by the intelligent control algorithm program of Programmable Logic Controller, complete the variable frequency regulating speed control to fan blower, thus reach the object of Energy Saving Control in sewage disposal process, comparatively opened loop control can better ensure effluent quality.
As Fig. 3 shows the energy-saving control system of the wastewater treatment energy-saving control method based on ternary three-dimensional table, comprising:
Reaction tank;
Feed water flow gauge, detects the current flow of inlet water Q ' of described reaction tank;
Water inlet chemical oxygen demand detection instrument, detects the current chemical oxygen demand of water body P ' of intaking in described reaction tank;
Water outlet chemical oxygen demand detection instrument, detects the current chemical oxygen demand of water body C of water outlet in described reaction tank;
Intelligent controller, be electrically connected with feed water flow gauge, intake chemical oxygen demand detection instrument and water outlet chemical oxygen demand detection instrument, gather current flow of inlet water Q ', current chemical oxygen demand of water body P ' and current water outlet chemical oxygen demand of water body C that related device detects;
Fan blower, connects air-diffuser by pipeline, and described air-diffuser is placed in described reaction tank;
Starting controller, is electrically connected with fan blower and intelligent controller, for controlling the keying of described fan blower;
Host computer, is electrically connected with intelligent controller, host computer for the three-dimensional table n setting up flow of inlet water Q to increase gradually respectively, water inlet chemical oxygen demand of water body P and water outlet chemical oxygen demand (COD) deviation delta C is ternary, wherein, and
Along with flow of inlet water Q and water inlet chemical oxygen demand of water body P and water outlet chemical oxygen demand of water body deviation delta C increase gradually or reduce, the theoretical work number of units n of corresponding fan blower increases gradually or reduces, and the theoretical work number of units n of corresponding fan blower increases gradually or reduces;
Along with flow of inlet water Q, water inlet chemical oxygen demand of water body P and water outlet chemical oxygen demand of water body deviation delta C increase gradually or reduce, the theoretical output frequency value of corresponding fan blower
increase gradually or reduction;
Host computer carries out cross bearing according to intelligent controller collection and the current flow of inlet water Q ' uploaded, current chemical oxygen demand of water body P ' and obtains current fan blower theoretical work number of units n in ternary three-dimensional table, carries out according to according to fan blower theoretical work number of units n and water outlet chemical oxygen demand of water body deviate Δ C the theoretical output frequency value that three-dimensional localization obtains described fan blower in described three-dimensional table n
, by the theoretical output frequency value of described fan blower
compare with the actual output frequency value f of fan blower, and send the instruction that the actual output frequency of fan blower is regulated to intelligent controller; According to fan blower theoretical work number of units n to the output frequency of fan blower and and real work number of units n ' compare, and send fan blower to intelligent controller and open and close the instruction of quantity.
Energy-saving control system of the present invention to be intake dynamic change for Sewage Plant, by each Indexs measure instrument, dynamic data information is collected, and be input to upper location supervisory by intelligent controller, by upper location supervisory, information processed, analyze, calculate corresponding fan blower and be suitable for running frequency, export blower frequency by intelligent controller, simultaneously upper location supervisory by intelligent controller signal input device controlled and state with the keying of opertaing device (fan blower).
Based Intelligent Control flow process based on the wastewater treatment energy-saving control device of ternary three-dimensional table: first each Indexs measure instrument by information input upper location supervisories such as flow of inlet water, influent COD and water outlet COD, calculates blower frequency value by ternary three-dimensional table in upper location supervisory operation decision support system by intelligent controller
, and export to blower frequency output and fan blower starting controller by intelligent controller, blower frequency exports and controls the instruction of fan blower execution upper location supervisory, and fan blower starting controller controls fan blower operation open/close states.
Its concrete operation process is:
(1) flow of inlet water, influent COD and water outlet COD is obtained by each Indexs measure instrument, and data are inputted upper location supervisory by intelligent controller, the wherein conversion of intelligent controller settling signal and transmission, receive each Indexs measure instrument input data on the one hand, and fan blower running status, frequency, by collected information input upper location supervisory; Receive upper location supervisory signal on the other hand, control fan conditions, rate-adaptive pacemaker.
(2) upper location supervisory accepts intelligent controller input signal, calculates fan blower appropriate frequency, and result is inputted intelligent controller by core ternary three-dimensional table;
(3) intelligent controller is according to upper location supervisory instruction, outputs signal to blower frequency output, fan blower starting controller;
(4) fan blower exports according to blower frequency, performs blower frequency; According to fan blower starting controller, control fan blower and open and close.
Saving energy and reduce the cost for realizing Sewage Plant under the prerequisite that sewage effluents is up to standard, the present invention is directed to fan blower Problems existing, proposing a kind of wastewater treatment Energy Saving Control engineering method based on ternary three-dimensional table.The present invention can play energy-efficient effect in engineering, solves the problem that existing theoretical method is difficult to practical application; Each Parameter adjustable, flexible operation, solves the problems such as some process operations are inflexible, mechanical.The present invention for input with the interval numerical value of flow of inlet water, influent COD value and water outlet COD deviation, controls blower frequency by three-dimensional table operation result, then makes sewage effluents COD automatically remain in setting district.Specifically, in the present invention with flow of inlet water Q, water inlet chemical oxygen demand (COD) P, water outlet COD deviation delta C for control inputs amount, according to based on the ternary three-dimensional table arithmetic element of expert knowledge library, calculate fan blower and answer running frequency
and change blower frequency, ensure that water outlet COD value remains in the normal range of setting.
First, obtain the ternary three-dimensional table based on expert knowledge library according to practical operation experience, formed by the ternary three-dimensional table closed-loop system of flow of inlet water, influent COD, water outlet COD deviation co-controlling blower frequency; Secondly, wastewater influent flowmeter, influent COD detector is utilized to obtain wastewater influent flow, influent COD content obtain water outlet COD by water outlet COD detector and calculate water outlet COD measured value and setting value deviation; Then, by the intelligent control algorithm program of Programmable Logic Controller, complete the variable frequency regulating speed control to fan blower, thus reach the object of Energy Saving Control in sewage disposal process.
Three-dimensional table is regional model, and suggestion is when there is a conventional fan blower in water factory, and prioritizing selection three-dimensional table 1, when flow or COD exceed threshold limit value in three-dimensional table 1, automatically performs three-dimensional table 2; When having two conventional fan blowers, prioritizing selection three-dimensional table 2, when flow or COD exceed three-dimensional table 2 threshold limit value, automatically performs three-dimensional table 3; The like.
(1) foundation of ternary three-dimensional table
In the three-dimensional table of Database flow of inlet water (Q), influent COD (P), water outlet COD deviation (Δ C) and blower frequency (f), every a pair flow of inlet water, influent COD, water outlet COD deviation (Q
i, P
j, Δ C
1) a corresponding corresponding blower frequency
air blast frequency
mainly contain two kinds of input modes.
1) manually input
According to sewage treatment plant's practical operating experiences, by manually inputting
value, carries out variable frequency adjustment to operating fan blower.
2) algorithm input
Sewage treatment plant according to the result of calculation of the ternary three-dimensional table based on expert knowledge library, can control blower variable frequency speed governing.Meanwhile, each sewage treatment plant according to actual operating state, can set the parameter in three-dimensional table, regulate, to reach the energy-efficient target subtracting consumption.Blower frequency computing formula is as follows:
Wherein:
for in three-dimensional table (n) submeter l, the i-th row, jth arrange corresponding blower frequency value; f
nfor base frequency in three-dimensional table (n);
for blower frequency actual increase step-length in three-dimensional table (n); θ
ij (n)for step-length increases coefficient; Δ f
nfor the basic step size increments of three-dimensional table (n); N ', N represent total line number, columns in three-dimensional table (n-1); [i+j-(N '+N)/2] represents that in three-dimensional table (n), the capable j row of i are apart from the step-length number of base frequency in three-dimensional table (n), namely on base frequency, increase several step-length, three-dimensional table establishes (N '+N)/2=1 in (1); K is instrument coefficient, i.e. fan blower operation conditions coefficient, as operational excellence get 0.9, normal operation gets 1.0.
(2) selection of blower frequency
In the three-dimensional table of Database flow of inlet water (Q), influent COD (P), water outlet COD deviation (Δ C) and blower frequency (f), wastewater influent flow, influent COD content is surveyed according to sewage treatment plant inflow flowmeter, influent COD detector, the contrast three-dimensional table scope of application, selects suitable three-dimensional table dimension table, suitable air blast frequency (see table 2-7).
(3) setting parameter
1) the adjustable water outlet COD setting value of 1 distribution is value range (C
0, C '
0), 1 value is distributed as shown in table 1, wherein C
0, C '
0, Δ C
0all can carry out individual character adjustment according to water factory's actual conditions.Have multiple adjustable parameter in three-dimensional table, can according to the setting of sewage treatment plant actual conditions, regulate, can the various operating condition of flexible adaptation, Engineering Effect is remarkable.
2) COD interval is adjustable: COD gradient can by sewage treatment plant according to actual operating mode from Row sum-equal matrix, (three-dimensional table inside can regulate Δ Q suitably can to strengthen COD gradient time as good in COD treatment effect
i; Q can be regulated between each three-dimensional table
j-Q
i), convenient, fast, can flexible adaptation treatment plant actual condition, energy-efficient.
3) flow intervals adjustable flow of inlet water Q gradient can by each sewage treatment plant from Row sum-equal matrix, can suitable enlargement discharge gradient (three-dimensional table internal adjustable Δ P time as good in treatment effect according to actual operating mode
i; P can be regulated between each three-dimensional table
j-P
i), flexible adaptation actual condition, ensures fan blower Effec-tive Function, to improve economy and environment benefit.
4) the adjustable blower frequency of blower frequency step-length actual increase step-length
according to sewage treatment plant's operating experience and actual condition, can be regulated voluntarily by producer.From formula (2-2,2-3),
by k, Δ f
ndetermine, sewage treatment plant can according to fan blower operation conditions sets itself, as certain factory have a conventional fan blower, operational excellence then establishes Δ f
1=5k=0.9; Δ f is established during fan blower normal operation
1=5.5k=1; Δ f is established when running poor
1=6k=1.1.
5) change of reaction time adjustable flow of inlet water each time, influent COD, namely calculates fan blower reply frequency by three-dimensional table, then regulates blower frequency by controller.From flow of inlet water or influent COD change, change to blower frequency, remember the reaction time (Δ t) during this period of time, sewage treatment plant can be had equally to carry out voluntarily setting, regulating.Sewage treatment plant's volume is comparatively large, and amount of inlet water or change of water quality can not affect the operation of whole water factory immediately, therefore need carefully to set the reaction time, and avoiding blower frequency to increase too early causing waste or increasing more lately affects treatment effect.
(4) scope of application
The present invention has important engineering practical value in blower variable frequency adjustment, other aspects, as the various sewage treatment plants common equipments such as water pump, dosing pump, sludge pump, stirrer all can adopt the method to control, and then the target of energy-saving consumption-reducing is carried out from each link of sewage treatment plant, obtain higher economy, environmental benefit.
Here the device quantity illustrated and treatment scale are used to simplify explanation of the present invention.The application of the wastewater treatment energy-saving control method based on ternary three-dimensional table of the present invention and control system, modifications and variations be will be readily apparent to persons skilled in the art.
The present invention can set up three-dimensional table using flow of inlet water Q, water inlet chemical oxygen demand of water body P and water outlet chemical oxygen demand (COD) deviation delta C as ternary, realize close-loop feedback to control, effluent quality can better be ensured, take into full account the undulatory property of water condition and technique, under the prerequisite that ensure that effluent quality, achieve energy-saving and cost-reducing, realize the accurate control to sewage drainage, energy-efficient effect can be played in engineering, solve the problem that existing theoretical method is difficult to practical application.
Although embodiment of the present invention are open as above, it is not restricted to listed in instructions and embodiment utilization.It can be applied to various applicable the field of the invention completely.For those skilled in the art, can easily realize other amendment.Therefore do not deviating under the universal that claim and equivalency range limit, the present invention is not limited to specific details and illustrates here and the legend described.
Claims (10)
1. the wastewater treatment energy-saving control method based on ternary three-dimensional table, for the output frequency of the change reasonable adjusting fan blower according to wastewater influent flow, wastewater influent chemical oxygen demand of water body and water outlet chemical oxygen demand of water body deviation, comprise the following steps:
1) set up with the flow of inlet water Q increased gradually respectively, water inlet chemical oxygen demand of water body P and the water outlet chemical oxygen demand (COD) deviation delta C three-dimensional table n that is ternary, wherein, and
Along with flow of inlet water Q and water inlet chemical oxygen demand of water body P and water outlet chemical oxygen demand of water body deviation delta C increase gradually or reduce, the theoretical work number of units n of corresponding fan blower increases gradually or reduces;
Along with flow of inlet water Q, water inlet chemical oxygen demand of water body P and water outlet chemical oxygen demand of water body deviation delta C increase gradually or reduce, the theoretical output frequency value of corresponding fan blower
increase gradually or reduction;
2) regularly intercept current flow of inlet water Q ', as advancing water chemical oxygen demand of water body P ' and water outlet chemical oxygen demand (COD) C simultaneously;
3) according to the current water outlet chemical oxygen demand (COD) C and setting value C intercepted
0mathematic interpolation current water outlet chemical oxygen demand of water body deviate Δ C, wherein said setting value C
0for chemical oxygen demand of water body emission compliance value;
4) in described three-dimensional table n, carry out cross bearing according to the current described flow of inlet water Q ' intercepted and current described water inlet chemical oxygen demand of water body P ' and obtain current fan blower theoretical work number of units n;
5) in described three-dimensional table n, carry out according to current described flow of inlet water Q ', current described water inlet chemical oxygen demand of water body P ' and water outlet chemical oxygen demand of water body deviate Δ C the theoretical output frequency value that three-dimensional localization obtains described fan blower
6) according to the current fan blower theoretical work number of units n of acquisition and the theoretical output frequency value of fan blower
the output frequency of real work number of units n ' and fan blower is adjusted in real time.
2. as claimed in claim 1 based on the wastewater treatment energy-saving control method of ternary three-dimensional table, wherein, when real work number of units n '=1 of fan blower, and obtain the theoretical output frequency value of described fan blower according to three-dimensional table n
time, the actual operating frequency of fan blower enforces 0.6f, the theoretical work number of units n=1 of fan blower, and wherein, f is fan blower maximum frequency values.
3. as claimed in claim 1 based on the wastewater treatment energy-saving control method of ternary three-dimensional table, wherein, when real work number of units n '>=2 of fan blower, and obtain the theoretical output frequency value of described fan blower according to three-dimensional table
time, the theoretical work number of units n=n '-1 of fan blower, the real work number of units of adjustment fan blower quantitatively reduces 1 at the fan blower of original duty, repeats step 2 afterwards) ~ 6), wherein, f is fan blower maximum frequency values.
4. as claimed in claim 1 based on the wastewater treatment energy-saving control method of ternary three-dimensional table, wherein, when real work number of units n '>=1 of fan blower, and obtain the theoretical output frequency value of described fan blower according to three-dimensional table
time, the actual operating frequency of fan blower is adjusted to the theoretical output frequency value of described fan blower
the theoretical work number of units n=n ' of fan blower;
When real work number of units n '>=1 of fan blower, and obtain the theoretical output frequency value of described fan blower according to three-dimensional table
time, the actual operating frequency of fan blower enforces f, the theoretical work number of units n=n ' of fan blower, and wherein, f is fan blower maximum frequency values.
5. as claimed in claim 1 based on the wastewater treatment energy-saving control method of ternary three-dimensional table, wherein, when fan blower number of units n '>=1 of real work, and obtain the theoretical output frequency value of described fan blower according to three-dimensional table
when being greater than 1.1 times of the maximum frequency values f of fan blower, the theoretical work number of units n=n '+1 of fan blower, the real work number of units of adjustment fan blower quantitatively increases by 1 at the fan blower of original duty, and wherein, f is fan blower maximum frequency values.
6. as claimed in claim 1 based on the wastewater treatment energy-saving control method of ternary three-dimensional table, wherein, position in three-dimensional table n with water outlet chemical oxygen demand of water body deviation delta C according to actual fan blower work number of units n ', by intercepting when advancing water chemical oxygen demand of water body P ' brings in three-dimensional table n, by the maximal value P of P ' with three-dimensional table n
nmaxcompare, if P ' > is P
nmax, the real work number of units of adjustment fan blower quantitatively increases by 1 at the fan blower of original duty, and wherein, the concrete grammar of location is n '=n,
wherein Δ C
0for artificial setting value.
7. as claimed in claim 1 based on the wastewater treatment energy-saving control method of ternary three-dimensional table, wherein, position in three-dimensional table n with water outlet chemical oxygen demand of water body deviation delta C according to actual fan blower work number of units n ', current for intercepting flow of inlet water Q ' is brought in three-dimensional table n, by the maximal value Q of Q ' with three-dimensional table n
nmaxcompare, if Q ' > is Q
nmax, the real work number of units of adjustment fan blower quantitatively increases by 1 at the fan blower of original duty, and wherein, the concrete grammar of location is n '=n,
wherein Δ C
0for artificial setting value.
8. as claimed in claim 1 based on the wastewater treatment energy-saving control method of ternary three-dimensional table, wherein, when fan blower number of units n '>=2 of real work, position in three-dimensional table n with water outlet chemical oxygen demand of water body deviation delta C according to actual fan blower work number of units n ', current for intercepting flow of inlet water Q ' is brought in three-dimensional table n, by the maximal value Q of Q ' with three-dimensional table n
(n-1) maxcompare, if Q ' < is Q
(n-1) max, the real work number of units of adjustment fan blower quantitatively reduces 1 at the fan blower of original duty, and wherein localization method is n '=n,
wherein Δ C
0for artificial setting value.
9. the wastewater treatment Energy Saving Control engineering method method based on ternary three-dimensional table according to any one of claim 1-8, wherein, the theoretical output frequency value of described fan blower
obtained by algorithm, be specially:
Wherein:
for in three-dimensional table n submeter l, the i-th row, jth arrange corresponding blower frequency value; f
nfor base frequency in three-dimensional table n, f
n=0.6f;
for the actual increase of blower frequency in three-dimensional table n step-length; θ
ij (n)for step-length increases coefficient; Δ f
nfor the basic step size increments of three-dimensional table (n); N ', N represent total line number, columns in three-dimensional table n-1,
wherein Δ C
0for artificial setting value, [i+j-(N '+N)/2] represents that in three-dimensional table n, the capable j row of i, apart from the step-length number of base frequency in three-dimensional table n, namely increase several step-length, establish (N '+N)/2=1 in three-dimensional table 1 on base frequency; K is instrument coefficient, and described instrument parameter is 0.9 ~ 1.1; Part corresponding when being n that three-dimensional table n is fan blower theoretical number of units corresponding in three-dimensional table; Part corresponding when being n-1 that three-dimensional table n-1 is fan blower theoretical number of units corresponding in three-dimensional table.
10. as claimed in claim 9 based on the wastewater treatment energy-saving control method of ternary three-dimensional table, wherein, when the maximum frequency values f of fan blower is 50Hz, it is 0 ~ 1600t/h that separate unit fan blower can bear flow of inlet water Q, and water inlet chemical oxygen demand of water body P is 0 ~ 400mg/L.
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|---|---|---|---|---|
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| CN102491507A (en) * | 2011-12-13 | 2012-06-13 | 西部水务集团(贵州)有限公司 | Method and device of automatic control for sequencing batch type treatment process at non-DO state |
| CN204097170U (en) * | 2014-07-30 | 2015-01-14 | 上海星伦工业自动化技术有限公司 | Dissolution of contaminated water oxygen concn automatic-adjusting device |
-
2015
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3565796A (en) * | 1970-02-11 | 1971-02-23 | Biospherics Inc | Method for increasing oxygen availability in sewage treatment |
| GB1412590A (en) * | 1971-12-20 | 1975-11-05 | Gary Aircraft Corp | Biological treatment of liquid effluent |
| CN102491507A (en) * | 2011-12-13 | 2012-06-13 | 西部水务集团(贵州)有限公司 | Method and device of automatic control for sequencing batch type treatment process at non-DO state |
| CN204097170U (en) * | 2014-07-30 | 2015-01-14 | 上海星伦工业自动化技术有限公司 | Dissolution of contaminated water oxygen concn automatic-adjusting device |
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