CN103488084A - System and method for controlling standardized discharging of noxious substances of pesticide incinerator through fuzzy network - Google Patents

Abstract

The invention discloses a system and method for controlling standardized discharging of noxious substances of a pesticide incinerator through a fuzzy network. The system comprises the incinerator, an intelligent instrument, a DCS system, a data port and an upper computer. The DCS system comprises a control station and a database, the intelligent instrument used for measuring easy-to-measure variables is connected with the DCS system, and the DCS system is connected with the upper computer through the data port. The upper computer carries out pre-processing and fuzzification on a training sample firstly to obtain a new input matrix, then a regression model of the new input matrix is built through an RBF neural network to obtain predicted output, and ultimately, defuzzification is carried out on the output of the RBF neural network to obtain output of the system. The upper computer further has the functions of model updating and result displaying. The system and method have the advantages of being capable of measuring COD on line, effectively monitoring whether the COD exceeds the standard and controlling discharging of the COD to be standardized, being resistant to noise, strong in self-learning capacity and high in calculation speed, and the like.

Description

Agricultural chemicals incinerator hazardous emission control system up to standard and the method for FUZZY NETWORK

Technical field

The present invention relates to the pesticide producing field, relate in particular to a kind of agricultural chemicals incinerator hazardous emission control system up to standard and method of FUZZY NETWORK.

Background technology

China is pesticide producing and use big country, and pesticide producing enterprise has reached 4100 left and right, and its Central Plains medicine manufacturing enterprise is family more than 500, and national Ministry of Agriculture statistics shows that 1～November in 2008, the agricultural chemicals total production reached 171.1 ten thousand tons.The irrationality of China's pesticide species structure has more strengthened the difficulty of environmental improvement.According to incompletely statistics, the waste water of the annual discharge of national pesticide industry is about 1,500,000,000 tons.Wherein, process and up to standard only account for processed 1%.Burning method be process at present agricultural chemicals raffinate and waste residue the most effectively, thoroughly, the most general method of application.After burning, the chemical oxygen consumption (COC) (COD) of waste water is the most important index that pesticide waste liquid burns hazardous emission, but it can't on-line measurement, and off-line measurement once needs four or five hours, can't reflect in time working conditions change and instruct actual production.Therefore, in actual burning process, the COD severe overweight.

Summary of the invention

Can't on-line measurement in order to overcome existing incinerator process COD, the deficiency of COD severe overweight, the invention provides a kind of agricultural chemicals incinerator hazardous emission control system up to standard and method of FUZZY NETWORK, whether it has on-line measurement COD, effectively monitor COD exceeds standard, controls the advantages such as COD emission compliance, antinoise and self-learning capability are strong, computing velocity is fast.

The technical solution adopted for the present invention to solve the technical problems is:

A kind of agricultural chemicals incinerator hazardous emission control system up to standard of FUZZY NETWORK, comprise incinerator, intelligent instrument, DCS system, data-interface and host computer, and described DCS system comprises control station and database; Described field intelligent instrument is connected with the DCS system, and described DCS system is connected with host computer, and described host computer comprises:

Data preprocessing module, for carrying out pre-service from the model training sample of DCS database input, to the training sample centralization, deduct the mean value of sample, then it carried out to standardization:

Computation of mean values: $\stackrel{\‾}{\mathrm{TX}}=\frac{1}{N}\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{\mathrm{TX}}_i---\left(1\right)$

Calculate variance: ${\mathrm{\σ}}_x^2=\frac{1}{N-1}\underset{i=1}{\overset{N}{\mathrm{\Σ}}}({\mathrm{TX}}_i-\stackrel{\‾}{\mathrm{TX}})---\left(2\right)$

Standardization: $X=\frac{\mathrm{TX}-\stackrel{\‾}{\mathrm{TX}}}{{\mathrm{\σ}}_x}---\left(3\right)$

Wherein, TX _ibe i training sample, the data of the production that gathers from the DCS database key variables, chemical oxygen consumption (COC) (COD) when normal and the performance variable while making accordingly the COD emission compliance, N is number of training, the average that TX is training sample, and X is the training sample after standardization.σ _xthe standard deviation that means training sample, σ ² _xthe variance that means training sample.The fuzzifying equation module, the training sample X to from data preprocessing module passes the standardization of coming, carry out obfuscation.If in the fuzzifying equation system, c is arranged ^*individual fuzzy group, the center of fuzzy group k, j is respectively v _k, v _j, i training sample X after standardization _idegree of membership μ for fuzzy group k _ikfor:

${\mathrm{\μ}}_{\mathrm{ik}}{\left(\underset{j=1}{\overset{c^{*}}{\mathrm{\Σ}}}{\left(\frac{\left|\right|X_i-v_k}{X_i-v_j}\right)}^{\frac{2}{m-1}}\right)}^{-1}---\left(4\right)$

In formula, m is the partitioned matrix index needed in the fuzzy classification process, usually get and do 2, || || be the norm expression formula.

Use above degree of membership value or its distortion to obtain new input matrix, for fuzzy group k, its input matrix is deformed into:

Φ _ik(X _i,μ _ik)=[1func(μ _ik)X _i] （5）

Func (μ wherein _ik) be degree of membership value μ _ikwarping function, generally get

exp (μ _ik) etc., Φ _ik(X _i, μ _ik) mean i input variable X _iand the degree of membership of fuzzy group k _{μ ik}corresponding new input matrix.

The RBF neural network is as the local equation of fuzzifying equation system, and the prediction of establishing k RBF Neural Fuzzy equation output layer is output as have:

${\hat{y}}_{\mathrm{ik}}=\underset{l}{\mathrm{\Σ}}{w}_{\mathrm{lk}}{\mathrm{\Ψ}}_{\mathrm{lk}}\left(\right||X_i-C_{\mathrm{lk}}|\left|\right)---\left(6\right)$

Wherein, C _lkand w _lkcenter and the output weights of l node of k RBF Neural Fuzzy equation, Ψ _lk(|| X _i-C _lk||) be the radial basis function of l node of k RBF Neural Fuzzy equation, by following formula, determined:

${\mathrm{\Ψ}}_{\mathrm{lk}}\left(\right||X_i-C_{\mathrm{lk}}|\left|\right)=\exp (-\frac{{\left(\right||X_i-C_{\mathrm{lk}}|\left|\right)}^2}{2\×{\mathrm{\σ}}_{\mathrm{lk}}})---\left(7\right)$

Wherein, σ _lkthe Gaussian width of corresponding radial basis function, || || be the norm expression formula.Finally, the gravity model appoach in the Anti-fuzzy method obtains the output of last fuzzifying equation system:

${\hat{y}}_i=\frac{{\mathrm{\Σ}}_{k=1}^{c^{*}}{\mathrm{\μ}}_{\mathrm{ik}}{\hat{y}}_{\mathrm{ik}}}{{\mathrm{\Σ}}_{k=1}^{c^{*}}{\mathrm{\μ}}_{\mathrm{ik}}}---\left(8\right)$

be corresponding to i training sample X after standardization _ithe COD predicted value and make the performance variable value of COD emission compliance.

As preferred a kind of scheme: described host computer also comprises: the discrimination model update module, for the sampling time interval by setting, collection site intelligent instrument signal, the actual measurement chemical oxygen consumption (COC) function predicted value obtained is compared, if relative error be greater than 10% or actual measurement COD data not up to standard, the new data up to standard of producing in database when normal is added to training sample data, Renewal model.

Further, described host computer also comprises: display module as a result, be used for the COD predicted value and make the performance variable value of COD emission compliance pass to the DCS system, and, at the control station procedure for displaying state of DCS, by DCS system and fieldbus, process status information is delivered to operator station simultaneously and is shown; Simultaneously, the DCS system, using the resulting performance variable value that makes the COD emission compliance as new performance variable setting value, automatically performs the operation of COD emission compliance.Signal acquisition module, for the time interval of the each sampling according to setting, image data from database.

Further again, described key variables comprise the waste liquid flow that enters incinerator, enter the air mass flow of incinerator and enter the fuel flow rate of incinerator.Described performance variable comprises the air mass flow that enters incinerator and the fuel flow rate that enters incinerator.

The hazardous emission control method up to standard that the described agricultural chemicals incinerator of a kind of use hazardous emission control system up to standard realizes, described control method specific implementation step is as follows:

1), to pesticide production waste liquid incinerator hazardous emission process object, according to industrial analysis and Operations Analyst, determine key variables used, when from the DCS database, collection production is normal, the data of described variable, as the input matrix of training sample TX, gather corresponding COD and make the performance variable data of COD emission compliance as output matrix Y;

2), will carry out pre-service from the model training sample of DCS database input, to the training sample centralization, deduct the mean value of sample, then it is carried out to standardization, making its average is 0, variance is 1.This processing adopts following formula process to complete:

2.1) computation of mean values: $\stackrel{\‾}{\mathrm{TX}}=\frac{1}{N}\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{\mathrm{TX}}_i---\left(1\right)$

2.2) the calculating variance: ${\mathrm{\σ}}_x^2=\frac{1}{N-1}\underset{i=1}{\overset{N}{\mathrm{\Σ}}}({\mathrm{TX}}_i-\stackrel{\‾}{\mathrm{TX}})---\left(2\right)$

2.3) standardization: $X=\frac{\mathrm{TX}-\stackrel{\‾}{\mathrm{TX}}}{{\mathrm{\σ}}_x}---\left(3\right)$

Wherein, TX _ibeing i training sample, is the data of the production that gathers from the DCS database key variables, chemical oxygen consumption (COC) (COD) when normal and the performance variable while making accordingly the COD emission compliance, and N is number of training,

for the average of training sample, X is the training sample after standardization.σ _xthe standard deviation that means training sample, σ ² _xthe variance that means training sample.

3) to pass the training sample of coming from data preprocessing module, carry out obfuscation.If in the fuzzifying equation system, c is arranged ^*individual fuzzy group, the center of fuzzy group k, j is respectively v _k, v _j, i training sample X after standardization _idegree of membership μ for fuzzy group k _ikfor:

${\mathrm{\μ}}_{\mathrm{ik}}{\left(\underset{j=1}{\overset{c^{*}}{\mathrm{\Σ}}}{\left(\frac{\left|\right|X_i-v_k}{X_i-v_j}\right)}^{\frac{2}{m-1}}\right)}^{-1}---\left(4\right)$

In formula, m is the partitioned matrix index needed in the fuzzy classification process, usually get and do 2, || || be the norm expression formula.

Use above degree of membership value or its distortion to obtain new input matrix, for fuzzy group k, its input matrix is deformed into:

Φ _ik(X _i,μ _ik)=[1func(μ _ik)X _i] （5）

Func (μ wherein _ik) be degree of membership value μ _ikwarping function, generally get

exp (μ _ik) etc., Φ _ik(X _i, μ _ik) mean i input variable X _iand the degree of membership μ of fuzzy group k _ikcorresponding new input matrix.

The RBF neural network is as the local equation of fuzzifying equation system, and the prediction of establishing k RBF Neural Fuzzy equation output layer is output as

${\hat{y}}_{\mathrm{ik}}=\underset{l}{\mathrm{\Σ}}{w}_{\mathrm{lk}}{\mathrm{\Ψ}}_{\mathrm{lk}}\left(\right||X_i-C_{\mathrm{lk}}|\left|\right)---\left(6\right)$

Wherein, C _lkand w _lkcenter and the output weights of l node of k RBF Neural Fuzzy equation, Ψ _lk(|| X _i-C _lk||) be the radial basis function of l node of k RBF Neural Fuzzy equation, by following formula, determined:

${\mathrm{\Ψ}}_{\mathrm{lk}}\left(\right||X_i-C_{\mathrm{lk}}|\left|\right)=\exp (-\frac{{\left(\right||X_i-C_{\mathrm{lk}}|\left|\right)}^2}{2\×{\mathrm{\σ}}_{\mathrm{lk}}})---\left(7\right)$

Wherein, σ _lkthe Gaussian width of corresponding radial basis function, || || be the norm expression formula.Finally, the gravity model appoach in the Anti-fuzzy method obtains the output of last fuzzifying equation system:

${\hat{y}}_i=\frac{{\mathrm{\Σ}}_{k=1}^{c^{*}}{\mathrm{\μ}}_{\mathrm{ik}}{\hat{y}}_{\mathrm{ik}}}{{\mathrm{\Σ}}_{k=1}^{c^{*}}{\mathrm{\μ}}_{\mathrm{ik}}}---\left(8\right)$

be corresponding to i training sample X after standardization _ithe COD predicted value and make the performance variable value of COD emission compliance.

As preferred a kind of scheme: described method also comprises: 4) by the sampling time interval of setting, collection site intelligent instrument signal, the actual measurement chemical oxygen consumption (COC) function predicted value obtained is compared, if relative error be greater than 10% or actual measurement COD data not up to standard, the new data up to standard of producing in the DCS database when normal is added to training sample data, Renewal model.

Further, in described step 3), by COD predicted value and make the performance variable value of COD emission compliance pass to the DCS system, and, at the control station procedure for displaying state of DCS, by DCS system and fieldbus, process status information is delivered to operator station simultaneously and is shown; Simultaneously, the DCS system, using the resulting performance variable value that makes the COD emission compliance as new performance variable setting value, automatically performs the operation of COD emission compliance.

Further again, described key variables comprise the waste liquid flow that enters incinerator, and the air mass flow that enters incinerator enters the fuel flow rate of incinerator; Described performance variable comprises the air mass flow that enters incinerator and the fuel flow rate that enters incinerator.

Technical conceive of the present invention is: the invention provides a kind of agricultural chemicals incinerator hazardous emission control system up to standard and method of FUZZY NETWORK, search out the performance variable value that makes chemical oxygen demand (COD) discharge up to standard.

Beneficial effect of the present invention is mainly manifested in: the online soft sensor model of 1, having set up quantitative relationship between system core variable and chemical oxygen demand (COD) discharge; 2, find rapidly the operating conditions that makes chemical oxygen demand (COD) discharge up to standard.

The accompanying drawing explanation

Fig. 1 is the hardware structure diagram of system proposed by the invention;

Fig. 2 is the functional structure chart of host computer proposed by the invention.

Embodiment

Below in conjunction with accompanying drawing, the invention will be further described.The embodiment of the present invention is used for the present invention that explains, rather than limits the invention, and in the protection domain of spirit of the present invention and claim, any modification and change that the present invention is made, all fall into protection scope of the present invention.

Embodiment 1

With reference to Fig. 1, Fig. 2, the agricultural chemicals incinerator hazardous emission control system up to standard of FUZZY NETWORK, comprise the field intelligent instrument 2, DCS system and the host computer 6 that are connected with incinerator 1, described DCS system comprises data-interface 3, control station 5 and database 4, described field intelligent instrument 2 is connected with data-interface 3, described data-interface is connected with control station 5, database 4 and host computer 6, and described host computer 6 comprises:

Data preprocessing module, for carrying out pre-service from the model training sample of DCS database input, to the training sample centralization, deduct the mean value of sample, then it carried out to standardization:

Computation of mean values: $\stackrel{\‾}{\mathrm{TX}}=\frac{1}{N}\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{\mathrm{TX}}_i---\left(1\right)$

Calculate variance: ${\mathrm{\σ}}_x^2=\frac{1}{N-1}\underset{i=1}{\overset{N}{\mathrm{\Σ}}}({\mathrm{TX}}_i-\stackrel{\‾}{\mathrm{TX}})---\left(2\right)$

Standardization: $X=\frac{\mathrm{TX}-\stackrel{\‾}{\mathrm{TX}}}{{\mathrm{\σ}}_x}---\left(3\right)$

Wherein, TX _ibeing i training sample, is the data of the production that gathers from the DCS database key variables, chemical oxygen consumption (COC) (COD) when normal and the performance variable while making accordingly the COD emission compliance, and N is number of training,

for the average of training sample, X is the training sample after standardization.σ _xthe standard deviation that means training sample, σ ² _xthe variance that means training sample.The fuzzifying equation module, the training sample X to from data preprocessing module passes the standardization of coming, carry out obfuscation.If in the fuzzifying equation system, c is arranged ^*individual fuzzy group, the center of fuzzy group k, j is respectively v _k, v _j, i training sample X after standardization _idegree of membership μ for fuzzy group k _ikfor:

${\mathrm{\μ}}_{\mathrm{ik}}{\left(\underset{j=1}{\overset{c^{*}}{\mathrm{\Σ}}}{\left(\frac{\left|\right|X_i-v_k}{X_i-v_j}\right)}^{\frac{2}{m-1}}\right)}^{-1}---\left(4\right)$

In formula, m is the partitioned matrix index needed in the fuzzy classification process, usually get and do 2, || || be the norm expression formula.

Use above degree of membership value or its distortion to obtain new input matrix, for fuzzy group k, its input matrix is deformed into:

Φ _ik(X _i,μ _ik)=[1func(μ _ik)X _i] （5）

Func (μ wherein _ik) be degree of membership value μ _ikwarping function, generally get

exp (μ _ik) etc., Φ _ik(X _i, μ _ik) mean i input variable X _iand the degree of membership μ of fuzzy group k _ikcorresponding new input matrix.

The RBF neural network is as the local equation of fuzzifying equation system, and the prediction of establishing k RBF Neural Fuzzy equation output layer is output as

${\hat{y}}_{\mathrm{ik}}=\underset{l}{\mathrm{\Σ}}{w}_{\mathrm{lk}}{\mathrm{\Ψ}}_{\mathrm{lk}}\left(\right||X_i-C_{\mathrm{lk}}|\left|\right)---\left(6\right)$

C wherein _lkand w _lkcenter and the output weights of l node of k RBF Neural Fuzzy equation, Ψ _lk(|| Xi-C _lk||) be the radial basis function of l node of k RBF Neural Fuzzy equation, by following formula, determined:

${\mathrm{\Ψ}}_{\mathrm{lk}}\left(\right||X_i-C_{\mathrm{lk}}|\left|\right)=\exp (-\frac{{\left(\right||X_i-C_{\mathrm{lk}}|\left|\right)}^2}{2\×{\mathrm{\σ}}_{\mathrm{lk}}})---\left(7\right)$

σ wherein _lkthe Gaussian width of corresponding radial basis function, || || be the norm expression formula.Finally, the gravity model appoach in the Anti-fuzzy method obtains the output of last fuzzifying equation system:

${\hat{y}}_i=\frac{{\mathrm{\Σ}}_{k=1}^{c^{*}}{\mathrm{\μ}}_{\mathrm{ik}}{\hat{y}}_{\mathrm{ik}}}{{\mathrm{\Σ}}_{k=1}^{c^{*}}{\mathrm{\μ}}_{\mathrm{ik}}}---\left(8\right)$

be corresponding to i training sample X after standardization _ithe COD predicted value and make the performance variable value of COD emission compliance.

Described host computer 6 also comprises: signal acquisition module 10, for the time interval of the each sampling according to setting, image data from database;

Described host computer 6 also comprises: discrimination model update module 11, by the sampling time interval of setting, collection site intelligent instrument signal, the actual measurement COD function predicted value obtained is compared, if relative error be greater than 10% or actual measurement COD data not up to standard, the new data up to standard of producing in the DCS database when normal is added to the training sample data.

Described key variables comprise the waste liquid flow that enters incinerator, enter the air mass flow of incinerator and enter the fuel flow rate of incinerator; Described performance variable comprises the air mass flow that enters incinerator and the fuel flow rate that enters incinerator.

Described system also comprises the DCS system, and described DCS system consists of data-interface 3, control station 5, database 4; Intelligent instrument 2, DCS system, host computer 6 are connected successively by fieldbus; Host computer 6 also comprises display module 9 as a result, be used for the COD predicted value and make the performance variable value of COD emission compliance pass to the DCS system, and, at the control station procedure for displaying state of DCS, by DCS system and fieldbus, process status information is delivered to operator station simultaneously and is shown; Simultaneously, the DCS system, using the resulting performance variable value that makes the COD emission compliance as new performance variable setting value, automatically performs the operation of COD emission compliance.

When the liquid waste incineration process has been furnished with the DCS system, the real-time and historical data base of the detection of sample real-time dynamic data, memory by using DCS system, obtain the COD predicted value and the function of the performance variable value of COD emission compliance mainly completed on host computer.

When the liquid waste incineration process is not equipped with the DCS system, adopted data memory substitutes the data storage function of the real-time and historical data base of DCS system, and one of the DCS system that do not rely on that will obtain the COD predicted value and the function system of the performance variable value of COD emission compliance is manufactured comprising I/O element, data-carrier store, program storage, arithmetical unit, several large members of display module complete SOC (system on a chip) independently, in the situation that no matter whether burning process is equipped with DCS, can both independently use, more be of value to and promoting the use of.

Embodiment 2

With reference to Fig. 1, Fig. 2, the agricultural chemicals incinerator hazardous emission control method up to standard of FUZZY NETWORK, described control method specific implementation step is as follows:

1), to pesticide production waste liquid incinerator hazardous emission process object, according to industrial analysis and Operations Analyst, determine key variables used, when from the DCS database, collection production is normal, the data of described variable, as the input matrix of training sample TX, gather corresponding COD and make the performance variable data of COD emission compliance as output matrix Y;

2), will carry out pre-service from the model training sample of DCS database input, to the training sample centralization, deduct the mean value of sample, then it is carried out to standardization, making its average is 0, variance is 1.This processing adopts following formula process to complete:

2.1) computation of mean values: $\stackrel{\‾}{\mathrm{TX}}=\frac{1}{N}\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{\mathrm{TX}}_i---\left(1\right)$

2.2) the calculating variance: ${\mathrm{\σ}}_x^2=\frac{1}{N-1}\underset{i=1}{\overset{N}{\mathrm{\Σ}}}({\mathrm{TX}}_i-\stackrel{\‾}{\mathrm{TX}})---\left(2\right)$

2.3) standardization: $X=\frac{\mathrm{TX}-\stackrel{\‾}{\mathrm{TX}}}{{\mathrm{\σ}}_x}---\left(3\right)$

Wherein, TX _ibeing i training sample, is the data of the production that gathers from the DCS database key variables, chemical oxygen consumption (COC) (COD) when normal and the performance variable while making accordingly the COD emission compliance, and N is number of training,

for the average of training sample, X is the training sample after standardization.σ _xthe standard deviation that means training sample, σ ² _xthe variance that means training sample.

3) to from data preprocessing module, passing the training sample after standardization of coming, carry out obfuscation.If in the fuzzifying equation system, c is arranged ^*individual fuzzy group, the center of fuzzy group k, j is respectively v _k, v _j, i training sample X after standardization _idegree of membership μ for fuzzy group k _ikfor:

${\mathrm{\μ}}_{\mathrm{ik}}{\left(\underset{j=1}{\overset{c^{*}}{\mathrm{\Σ}}}{\left(\frac{\left|\right|X_i-v_k}{X_i-v_j}\right)}^{\frac{2}{m-1}}\right)}^{-1}---\left(4\right)$

In formula, m is the partitioned matrix index needed in the fuzzy classification process, usually get and do 2, || || be the norm expression formula.

Use above degree of membership value or its distortion to obtain new input matrix, for fuzzy group k, its input matrix is deformed into:

Φ _ik(X _i,μ _ik)=[1func(μ _ik)X _i] （5）

Func (μ wherein _ik) be degree of membership value μ _ikwarping function, generally get

exp (μ _ik) etc., Φ _ik(X _i, μ _ik) mean i input variable X _iand the degree of membership μ of fuzzy group k _ikcorresponding new input matrix.

The RBF neural network is as the local equation of fuzzifying equation system, and the prediction of establishing k RBF Neural Fuzzy equation output layer is output as

${\hat{y}}_{\mathrm{ik}}=\underset{l}{\mathrm{\Σ}}{w}_{\mathrm{lk}}{\mathrm{\Ψ}}_{\mathrm{lk}}\left(\right||X_i-C_{\mathrm{lk}}|\left|\right)---\left(6\right)$

C wherein _lkand w _lkcenter and the output weights of l node of k RBF Neural Fuzzy equation, Ψ _lk(|| X _i-C _lk||) be the radial basis function of l node of k RBF Neural Fuzzy equation, by following formula, determined:

${\mathrm{\Ψ}}_{\mathrm{lk}}\left(\right||X_i-C_{\mathrm{lk}}|\left|\right)=\exp (-\frac{{\left(\right||X_i-C_{\mathrm{lk}}|\left|\right)}^2}{2\×{\mathrm{\σ}}_{\mathrm{lk}}})---\left(7\right)$

σ wherein _lkthe Gaussian width of corresponding radial basis function, || || be the norm expression formula.Finally, the gravity model appoach in the Anti-fuzzy method obtains the output of last fuzzifying equation system:

${\hat{y}}_i=\frac{{\mathrm{\Σ}}_{k=1}^{c^{*}}{\mathrm{\μ}}_{\mathrm{ik}}{\hat{y}}_{\mathrm{ik}}}{{\mathrm{\Σ}}_{k=1}^{c^{*}}{\mathrm{\μ}}_{\mathrm{ik}}}---\left(8\right)$

be corresponding to i training sample X after standardization _ithe COD predicted value and make the performance variable value of COD emission compliance.

4), by the sampling time interval of setting described method also comprises:, collection site intelligent instrument signal, the actual measurement COD function predicted value obtained is compared, if relative error be greater than 10% or actual measurement COD data not up to standard, the new data up to standard of producing in the DCS database when normal is added to training sample data, Renewal model.

5), in described step 3), by COD predicted value and make the performance variable value of COD emission compliance pass to the DCS system, and, at the control station procedure for displaying state of DCS, by DCS system and fieldbus, process status information is delivered to operator station simultaneously and is shown; Simultaneously, the DCS system, using the resulting performance variable value that makes the COD emission compliance as new performance variable setting value, automatically performs the operation of COD emission compliance.

Described key variables comprise the waste liquid flow that enters incinerator, and the air mass flow that enters incinerator enters the fuel flow rate of incinerator; Described performance variable comprises the air mass flow that enters incinerator and the fuel flow rate that enters incinerator.

Claims (2)

1. the agricultural chemicals incinerator hazardous emission control system up to standard of a FUZZY NETWORK, comprise incinerator, intelligent instrument, DCS system, data-interface and host computer, and described DCS system comprises control station and database; Described field intelligent instrument is connected with the DCS system, and described DCS system is connected with host computer, it is characterized in that: described host computer comprises:

Data preprocessing module, for carrying out pre-service from the model training sample of DCS database input, to the training sample centralization, deduct the mean value of sample, then it carried out to standardization:

Computation of mean values: $\stackrel{\‾}{\mathrm{TX}}=\frac{1}{N}\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{\mathrm{TX}}_i---\left(1\right)$

Calculate variance: ${\mathrm{\σ}}_x^2=\frac{1}{N-1}\underset{i=1}{\overset{N}{\mathrm{\Σ}}}({\mathrm{TX}}_i-\stackrel{\‾}{\mathrm{TX}})---\left(2\right)$

Standardization: $X=\frac{\mathrm{TX}-\stackrel{\‾}{\mathrm{TX}}}{{\mathrm{\σ}}_x}---\left(3\right)$

Wherein, TX _ibeing i training sample, is the data of the production that gathers from the DCS database key variables, chemical oxygen consumption (COC) (COD) when normal and the performance variable while making accordingly the COD emission compliance, and N is number of training,

for the average of training sample, X is the training sample after standardization.σ _xthe standard deviation that means training sample, σ ² _xthe variance that means training sample.The fuzzifying equation module, the training sample X to from data preprocessing module passes the standardization of coming, carry out obfuscation.If in the fuzzifying equation system, c is arranged ^*individual fuzzy group, the center of fuzzy group k, j is respectively v _k, v _j, i training sample X after standardization _idegree of membership μ for fuzzy group k _ikfor:

${\mathrm{\μ}}_{\mathrm{ik}}{\left(\underset{j=1}{\overset{c^{*}}{\mathrm{\Σ}}}{\left(\frac{\left|\right|X_i-v_k}{X_i-v_j}\right)}^{\frac{2}{m-1}}\right)}^{-1}---\left(4\right)$

In formula, m is the partitioned matrix index needed in the fuzzy classification process, usually get and do 2, || || be the norm expression formula.

Use above degree of membership value or its distortion to obtain new input matrix, for fuzzy group k, its input matrix is deformed into:

Φ _ik(X _i,μ _ik)=[1func(μ _ik)X _i] （5）

Func (μ wherein _ik) be degree of membership value μ _ikwarping function, generally get

exp (μ _ik) etc., Φ _ik(X _i, μ _ik) mean i input variable X _iand the degree of membership μ of fuzzy group k _ikcorresponding new input matrix.

The RBF neural network is as the local equation of fuzzifying equation system, and the prediction of establishing k RBF Neural Fuzzy equation output layer is output as

have:

${\hat{y}}_{\mathrm{ik}}=\underset{l}{\mathrm{\Σ}}{w}_{\mathrm{lk}}{\mathrm{\Ψ}}_{\mathrm{lk}}\left(\right||X_i-C_{\mathrm{lk}}|\left|\right)---\left(6\right)$

C wherein _lkand w _lkcenter and the output weights of l node of k RBF Neural Fuzzy equation, Ψ _lk(|| X _i-C _lk||) be the radial basis function of l node of k RBF Neural Fuzzy equation, by following formula, determined:

${\mathrm{\Ψ}}_{\mathrm{lk}}\left(\right||X_i-C_{\mathrm{lk}}|\left|\right)=\exp (-\frac{{\left(\right||X_i-C_{\mathrm{lk}}|\left|\right)}^2}{2\×{\mathrm{\σ}}_{\mathrm{lk}}})---\left(7\right)$

σ wherein _lkthe Gaussian width of corresponding radial basis function, || || be the norm expression formula.Finally, the gravity model appoach in the Anti-fuzzy method obtains the output of last fuzzifying equation system:

${\hat{y}}_i=\frac{{\mathrm{\Σ}}_{k=1}^{c^{*}}{\mathrm{\μ}}_{\mathrm{ik}}{\hat{y}}_{\mathrm{ik}}}{{\mathrm{\Σ}}_{k=1}^{c^{*}}{\mathrm{\μ}}_{\mathrm{ik}}}---\left(8\right)$

be corresponding to i training sample X after standardization _ithe COD predicted value and make the performance variable value of COD emission compliance.

Described host computer also comprises: the discrimination model update module, for the sampling time interval by setting, collection site intelligent instrument signal, the actual measurement COD function predicted value obtained is compared, if relative error be greater than 10% or actual measurement COD data not up to standard, the new data up to standard of producing in the DCS database when normal is added to training sample data, Renewal model.Display module as a result, for by the COD predicted value with make the performance variable value of COD emission compliance pass to the DCS system, show at the control station of DCS, and be delivered to operator station by DCS system and fieldbus and shown; Simultaneously, the DCS system, using the resulting performance variable value that makes the COD emission compliance as new performance variable setting value, automatically performs the operation of COD emission compliance.Signal acquisition module, for the time interval of the each sampling according to setting, image data from database.

Described key variables comprise the waste liquid flow that enters incinerator, enter the air mass flow of incinerator and enter the fuel flow rate of incinerator; Described performance variable comprises the air mass flow that enters incinerator and the fuel flow rate that enters incinerator.

2. the control method that the incinerator of the agricultural chemicals by FUZZY NETWORK as claimed in claim 1 hazardous emission control system up to standard realizes, it is characterized in that: described method specific implementation step is as follows:

1), to pesticide production waste liquid incinerator hazardous emission process object, according to industrial analysis and Operations Analyst, determine key variables used, when from the DCS database, collection production is normal, the data of described variable, as the input matrix of training sample TX, gather corresponding COD and make the performance variable data of COD emission compliance as output matrix Y;

2), will carry out pre-service from the model training sample of DCS database input, to the training sample centralization, deduct the mean value of sample, then it is carried out to standardization, making its average is 0, variance is 1.This processing adopts following formula process to complete:

2.1) computation of mean values: $\stackrel{\‾}{\mathrm{TX}}=\frac{1}{N}\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{\mathrm{TX}}_i---\left(1\right)$

2.2) the calculating variance: ${\mathrm{\σ}}_x^2=\frac{1}{N-1}\underset{i=1}{\overset{N}{\mathrm{\Σ}}}({\mathrm{TX}}_i-\stackrel{\‾}{\mathrm{TX}})---\left(2\right)$

2.3) standardization: $X=\frac{\mathrm{TX}-\stackrel{\‾}{\mathrm{TX}}}{{\mathrm{\σ}}_x}---\left(3\right)$

Wherein, TX _ibeing i training sample, is the data of the production that gathers from the DCS database key variables, COD when normal and the performance variable while making accordingly the COD emission compliance, and N is number of training,

for the average of training sample, X is the training sample after standardization.σ _xthe standard deviation that means training sample, σ ² _xthe variance that means training sample.

3) to pass the training sample of coming from data preprocessing module, carry out obfuscation.If in the fuzzifying equation system, c is arranged ^*individual fuzzy group, the center of fuzzy group k, j is respectively v _k, v _j, i training sample X after standardization _idegree of membership μ for fuzzy group k _ikfor:

${\mathrm{\μ}}_{\mathrm{ik}}{\left(\underset{j=1}{\overset{c^{*}}{\mathrm{\Σ}}}{\left(\frac{\left|\right|X_i-v_k}{X_i-v_j}\right)}^{\frac{2}{m-1}}\right)}^{-1}---\left(4\right)$

In formula, m is the partitioned matrix index needed in the fuzzy classification process, usually get and do 2, || || be the norm expression formula.

Use above degree of membership value or its distortion to obtain new input matrix, for fuzzy group k, its input matrix is deformed into:

Φ _ik(X _i,μ _ik)=[1func(μ _ik)X _i] （5）

Func (μ wherein _ik) be degree of membership value μ _ikwarping function, generally get

exp (μ _ik) etc., Φ _ik(X _i, μ _ik) mean i input variable X _iand the degree of membership μ of fuzzy group k _ikcorresponding new input matrix.

The RBF neural network is as the local equation of fuzzifying equation system, and the prediction of establishing k RBF Neural Fuzzy equation output layer is output as

have:

${\hat{y}}_{\mathrm{ik}}=\underset{l}{\mathrm{\Σ}}{w}_{\mathrm{lk}}{\mathrm{\Ψ}}_{\mathrm{lk}}\left(\right||X_i-C_{\mathrm{lk}}|\left|\right)---\left(6\right)$

C wherein _lkand w _lkcenter and the output weights of l node of k RBF Neural Fuzzy equation, Ψ _lk(|| Xi-Clk||) be the radial basis function of l node of k RBF Neural Fuzzy equation, determined by following formula:

${\mathrm{\Ψ}}_{\mathrm{lk}}\left(\right||X_i-C_{\mathrm{lk}}|\left|\right)=\exp (-\frac{{\left(\right||X_i-C_{\mathrm{lk}}|\left|\right)}^2}{2\×{\mathrm{\σ}}_{\mathrm{lk}}})---\left(7\right)$

σ wherein _lkthe Gaussian width of corresponding radial basis function, || || be the norm expression formula.Finally, the gravity model appoach in the Anti-fuzzy method obtains the output of last fuzzifying equation system:

${\hat{y}}_i=\frac{{\mathrm{\Σ}}_{k=1}^{c^{*}}{\mathrm{\μ}}_{\mathrm{ik}}{\hat{y}}_{\mathrm{ik}}}{{\mathrm{\Σ}}_{k=1}^{c^{*}}{\mathrm{\μ}}_{\mathrm{ik}}}---\left(8\right)$

be corresponding to i training sample X after standardization _ithe COD predicted value and make the performance variable value of COD emission compliance.

4), the discrimination model update module described method also comprises:, for the sampling time interval by setting, collection site intelligent instrument signal, the actual measurement chemical oxygen consumption (COC) function predicted value obtained is compared, if relative error be greater than 10% or actual measurement COD data not up to standard, the new data up to standard of producing in the DCS database when normal is added to the training sample data, upgrade the fuzzifying equation model.

5), the COD predicted value obtained in described step 3) and the performance variable value that makes the COD emission compliance, result is passed to the DCS system, show at the control station of DCS, and be delivered to operator station by DCS system and fieldbus and shown; Simultaneously, the DCS system, using the resulting performance variable value that makes the COD emission compliance as new performance variable setting value, automatically performs the operation of COD emission compliance.

Described key variables comprise the waste liquid flow that enters incinerator, enter the air mass flow of incinerator and enter the fuel flow rate of incinerator; Described performance variable comprises the air mass flow that enters incinerator and the fuel flow rate that enters incinerator.

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