CN109324155B - Refining device tail gas pollutant on-line monitoring data early warning method and device - Google Patents
Refining device tail gas pollutant on-line monitoring data early warning method and device Download PDFInfo
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 313
- 239000003344 environmental pollutant Substances 0.000 title claims abstract description 196
- 231100000719 pollutant Toxicity 0.000 title claims abstract description 196
- 238000007670 refining Methods 0.000 title claims abstract description 70
- 238000000034 method Methods 0.000 title claims abstract description 63
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims abstract description 337
- 239000003546 flue gas Substances 0.000 claims abstract description 331
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 330
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 101
- 239000001301 oxygen Substances 0.000 claims abstract description 101
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 101
- 230000008859 change Effects 0.000 claims abstract description 66
- 239000007789 gas Substances 0.000 claims abstract description 43
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims description 244
- 238000004590 computer program Methods 0.000 claims description 10
- 239000000779 smoke Substances 0.000 claims description 10
- 238000012545 processing Methods 0.000 claims description 9
- 238000003860 storage Methods 0.000 claims description 5
- 235000013399 edible fruits Nutrition 0.000 claims description 3
- 238000009792 diffusion process Methods 0.000 abstract description 45
- 238000009826 distribution Methods 0.000 abstract description 42
- 230000008569 process Effects 0.000 abstract description 22
- 238000010586 diagram Methods 0.000 description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- 239000000809 air pollutant Substances 0.000 description 11
- 231100001243 air pollutant Toxicity 0.000 description 11
- 238000003915 air pollution Methods 0.000 description 7
- 230000006870 function Effects 0.000 description 5
- 238000004523 catalytic cracking Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000013332 literature search Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000005504 petroleum refining Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical class S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 229910052815 sulfur oxide Inorganic materials 0.000 description 1
- 238000011426 transformation method Methods 0.000 description 1
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Abstract
The invention discloses an on-line monitoring data early warning method and device for refinery device tail gas pollutants, wherein the method comprises the following steps: acquiring online monitoring data of tail gas pollutants at a discharge port of a refining device, wherein the online monitoring data comprises a flue gas oxygen content monitoring value and a flue gas nitrogen oxide concentration monitoring value; determining the change rule of the monitoring value of the concentration of the nitrogen oxides in the flue gas according to the monitoring value of the oxygen content in the flue gas and the monitoring value of the concentration of the nitrogen oxides in the flue gas; and early warning is carried out according to the change rule of the concentration monitoring value of the nitrogen oxide in the flue gas and the emission limit value of the nitrogen oxide in the flue gas. The method and the device can quickly predict the possibility of exceeding the standard of the pollutant according to the online monitoring data of the tail gas pollutant at the discharge port of the refining device, avoid consuming a large amount of time due to the influence of analyzing the pollutant diffusion process and the pollutant distribution condition on the pollutant monitoring, simplify the analysis and operation process on the basis of ensuring accurate early warning, and realize the timely early warning before the pollutant discharge of the refining device exceeds the standard.
Description
Technical Field
The invention relates to the technical field of petroleum, petrochemical and environmental protection, in particular to an on-line monitoring data early warning method and device for tail gas pollutants of a refining device.
Background
The emission of atmospheric pollutants in the refining industry has always received wide attention from governments and social circles. The emission sources of sulfur oxides and nitrogen oxides in the production process of a refinery mainly comprise: regenerating flue gas by using a catalytic cracking catalyst; acid gas recovery unit tail gas; process heating furnace flue gas, etc. Taking a catalytic cracking device as an example, GB31570-2015 discharge Standard for Industrial pollutants for Petroleum refining issued in 2015 regulates the discharge concentration limits of sulfur dioxide and nitrogen oxide in the tail gas of the catalytic cracking device to be 700mg/m respectively3、420mg/m3(the integrated emission Standard of atmospheric pollutants (GB16297-1996)) is reduced to 100 and 200mg/m3Wherein in the special emission limit region, the emission is reduced to 50mg/m3、100mg/m3And the method is formally implemented in 2017, 7, month and 1, which causes a great challenge to the emission of pollutants reaching the standard in many refining enterprises. In order to monitor the pollutant emission condition of the refinery, the tail gas discharge ports of the three devices of the refinery are provided with pollutant online monitoring devices, high-frequency real-time monitoring is carried out on the pollutant emission of enterprises, and different pollutants are monitoredAnd corresponding penalty measures are taken for the over-standard emission situation.
At present, the refinery mainly adopts a process transformation method for controlling and reducing the emission of sulfur dioxide and nitrogen oxides of a refinery device, namely, low-nitrogen combustion burner transformation, catalytic cracking device desulfurization and denitrification transformation and the like are applied to a process heating boiler, but an online real-time monitoring data early warning model for atmospheric pollutants of the refinery device is less.
Through patent and literature search, the water quality or air pollutant early warning method that has been disclosed at present includes: a pollution source diffusion early warning method based on a water quality online monitoring system focuses on simulating a pollutant diffusion process in a water body based on a geographic information system; the method is mainly characterized in that pollutant diffusion concentration analysis is carried out by using a probability density function, and related influences of pollution accidents are evaluated; the method focuses on three-dimensional flow field simulation of pollutants and a related data processing model. The models relate to the water quality or air pollution diffusion process and the pollutant distribution condition, the influence of the water quality or air pollution diffusion process and the pollutant distribution condition on the water quality or air pollutant monitoring is considered, the early warning accuracy of the water quality or air pollutant is high by adopting the methods, but the analysis and operation processes of the influence of the pollution diffusion process and the pollutant distribution condition on the pollutant monitoring are very complicated, a large amount of time is consumed, and the rapid early warning of the pollutant cannot be realized.
Disclosure of Invention
The embodiment of the invention provides an on-line monitoring data early warning method for exhaust pollutants of an refining device, which is used for quickly predicting the possibility of exceeding the standard of the pollutants according to the on-line monitoring data of the exhaust pollutants at the discharge port of the refining device, avoiding the consumption of a large amount of time for analyzing the influence of the pollutant diffusion process and the pollutant distribution condition on the pollutant monitoring, simplifying the analysis and operation processes on the basis of ensuring accurate early warning, and realizing the timely early warning before the pollutant discharge of the refining device exceeds the standard, and comprises the following steps:
acquiring online monitoring data of tail gas pollutants at a discharge port of a refining device, wherein the online monitoring data comprises a flue gas oxygen content monitoring value and a flue gas nitrogen oxide concentration monitoring value;
determining the change rule of the monitoring value of the concentration of the nitrogen oxides in the flue gas according to the monitoring value of the oxygen content in the flue gas and the monitoring value of the concentration of the nitrogen oxides in the flue gas;
and early warning is carried out according to the change rule of the concentration monitoring value of the nitrogen oxide in the flue gas and the emission limit value of the nitrogen oxide in the flue gas.
The embodiment of the invention provides another refining device tail gas pollutant online monitoring data early warning method, which is used for quickly predicting the possibility of exceeding the standard of pollutants according to the online monitoring data of the tail gas pollutants at the discharge port of a refining device, avoiding the consumption of a large amount of time due to the analysis of the influence of the pollutant diffusion process and the pollutant distribution condition on the pollutant monitoring, simplifying the analysis and operation processes on the basis of ensuring accurate early warning, and realizing the timely early warning before the pollutant discharge of the refining device exceeds the standard, and comprises the following steps:
acquiring online monitoring data of tail gas pollutants at a discharge port of a refining device, wherein the online monitoring data comprises a monitoring value of oxygen content in flue gas and a monitoring value of sulfur dioxide concentration in the flue gas;
determining the change rule of the monitoring value of the concentration of the sulfur dioxide in the flue gas according to the monitoring value of the oxygen content in the flue gas and the monitoring value of the concentration of the sulfur dioxide in the flue gas;
and early warning is carried out according to the change rule of the concentration monitoring value of the sulfur dioxide in the flue gas and the emission limit value of the sulfur dioxide in the flue gas.
The embodiment of the invention provides an on-line monitoring data early warning device for exhaust pollutants of an refining device, which is used for quickly predicting the possibility of exceeding the standard of the pollutants according to the on-line monitoring data of the exhaust pollutants at the discharge port of the refining device, avoiding the consumption of a large amount of time for analyzing the influence of the pollutant diffusion process and the pollutant distribution condition on the pollutant monitoring, simplifying the analysis and operation processes on the basis of ensuring accurate early warning, and realizing the timely early warning before the pollutant discharge of the refining device exceeds the standard, and comprises the following steps:
the device comprises a data acquisition module, a data processing module and a data processing module, wherein the data acquisition module is used for acquiring online monitoring data of tail gas pollutants at a discharge port of the refining device, and the online monitoring data comprises a flue gas oxygen content monitoring value and a flue gas nitrogen oxide concentration monitoring value;
the change rule determining module is used for determining the change rule of the flue gas nitrogen oxide concentration monitoring value according to the flue gas oxygen content monitoring value and the flue gas nitrogen oxide concentration monitoring value;
and the early warning module is used for early warning according to the change rule of the concentration monitoring value of the nitrogen oxide in the flue gas and the emission limit value of the nitrogen oxide in the flue gas.
The embodiment of the invention provides another refining device tail gas pollutant online monitoring data early warning device, which is used for quickly predicting the possibility of exceeding the standard of pollutants according to the online monitoring data of the tail gas pollutants at the discharge port of the refining device, avoiding the consumption of a large amount of time due to the analysis of the influence of the pollutant diffusion process and the pollutant distribution condition on the pollutant monitoring, simplifying the analysis and operation processes on the basis of ensuring accurate early warning, and realizing the timely early warning before the pollutant discharge of the refining device exceeds the standard, and comprises the following steps:
the data acquisition module is used for acquiring online monitoring data of tail gas pollutants at a discharge port of the refining device, wherein the online monitoring data comprises a flue gas oxygen content monitoring value and a flue gas sulfur dioxide concentration monitoring value;
the change rule determining module is used for determining the change rule of the monitoring value of the concentration of the sulfur dioxide in the flue gas according to the monitoring value of the oxygen content in the flue gas and the monitoring value of the concentration of the sulfur dioxide in the flue gas;
and the early warning module is used for early warning according to the change rule of the monitoring value of the concentration of the sulfur dioxide in the flue gas and the emission limit value of the sulfur dioxide in the flue gas.
Compared with the scheme of realizing pollutant early warning by analyzing the influence of the pollutant diffusion process and the pollutant distribution condition on pollutant monitoring in the prior art, the embodiment of the invention obtains the online monitoring data of the tail gas pollutants at the discharge port of the refining device, then determines the change rule of the monitoring value of the concentration of the smoke pollutants according to the monitoring value of the oxygen content of the smoke and the monitoring value of the concentration of the smoke pollutants in the online monitoring data, and then carries out early warning according to the change rule of the monitoring value of the concentration of the smoke pollutants and the discharge limit value of the smoke pollutants. The embodiment of the invention only analyzes the online monitoring data of the refining device atmospheric pollutant discharge port, does not relate to the atmospheric pollutant diffusion process and the atmospheric pollutant distribution condition, does not need to consider the influence of the atmospheric pollutant diffusion process and the atmospheric pollutant distribution condition on the monitoring of the atmospheric pollutants, avoids the consumption of a large amount of time due to the influence of the analysis of the pollution diffusion process and the pollutant distribution condition on the pollutant monitoring, simplifies the analysis and operation processes on the basis of ensuring accurate early warning, and realizes the timely early warning before the pollutant discharge of the refining device exceeds the standard.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts. In the drawings:
FIG. 1 is a schematic diagram of an on-line monitoring data early warning method for refinery unit exhaust pollutants in the embodiment of the present invention;
FIG. 2 is a schematic diagram of another refinery apparatus exhaust pollutant on-line monitoring data early warning method in the embodiment of the present invention;
FIG. 3 is a diagram of an online monitoring data early warning device for exhaust pollutants of a refinery device in an embodiment of the present invention;
FIG. 4 is a structural diagram of another online monitoring data early warning device for exhaust gas pollutants of a refinery device in the embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.
In order to quickly predict the possibility of exceeding the standard of pollutants, avoid consuming a large amount of time due to the analysis of the pollution diffusion process and the influence of the pollutant distribution condition on the pollutant monitoring, and simplify the analysis and operation processes on the basis of ensuring accurate early warning, the embodiment of the invention provides an on-line monitoring data early warning method for the pollutants in the tail gas of a refining device, and as shown in fig. 1, the method can comprise the following steps:
102, determining a change rule of a flue gas nitrogen oxide concentration monitoring value according to a flue gas oxygen content monitoring value and a flue gas nitrogen oxide concentration monitoring value;
and 103, early warning is carried out according to the change rule of the concentration monitoring value of the nitrogen oxide in the flue gas and the emission limit value of the nitrogen oxide in the flue gas.
As shown in fig. 1, in the embodiment of the present invention, the change rule of the flue gas nitrogen oxide concentration monitoring value is determined by obtaining the online monitoring data of the exhaust gas pollutants at the discharge port of the refining device, and then the early warning is performed according to the change rule of the flue gas nitrogen oxide concentration monitoring value and the discharge limit value of the flue gas nitrogen oxide, which are included in the online monitoring data. The embodiment of the invention only analyzes the online monitoring data of the refining device atmospheric pollutant discharge port, does not relate to the atmospheric pollutant diffusion process and the atmospheric pollutant distribution condition, does not need to consider the influence of the atmospheric pollutant diffusion process and the atmospheric pollutant distribution condition on the monitoring of the atmospheric pollutants, avoids the consumption of a large amount of time due to the influence of the analysis of the pollution diffusion process and the pollutant distribution condition on the pollutant monitoring, simplifies the analysis and operation processes on the basis of ensuring accurate early warning, and realizes the timely early warning before the pollutant discharge of the refining device exceeds the standard.
In specific implementation, the method comprises the steps of obtaining on-line monitoring data of tail gas pollutants at a discharge port of the refining device, wherein the on-line monitoring data comprises a flue gas oxygen content monitoring value and a flue gas nitrogen oxide concentration monitoring value. The inventor finds that the existing early warning models relate to the diffusion process of water quality or air pollution and the distribution condition of pollutants, the influence of the diffusion process of water quality or air pollution and the distribution condition of pollutants on the monitoring of water quality or air pollutants is considered, the early warning accuracy of the methods for water quality or air pollutants is high, but the analysis and operation processes of the influence of the diffusion process of pollution and the distribution condition of pollutants on the monitoring of pollutants are very complicated, a large amount of time is consumed, and the rapid early warning of pollutants cannot be realized. The embodiment of the invention only analyzes the online monitoring data of the refining device air pollutant discharge port, does not relate to the air pollution diffusion process and the air pollutant distribution condition, does not need to consider the influence of the air pollution diffusion process and the air pollutant distribution condition on the air pollutant monitoring, avoids the consumption of a large amount of time due to the influence of the analysis of the pollution diffusion process and the pollutant distribution condition on the pollutant monitoring, simplifies the analysis and operation processes on the basis of ensuring accurate early warning, and realizes the timely early warning before the pollutant discharge of the refining device exceeds the standard.
In the embodiment, the monitoring value of the oxygen content of the flue gas at each moment and the monitoring value of the concentration of the nitric oxide of the flue gas at each moment are respectively obtained, so that a monitoring value sequence of the oxygen content of the flue gas and a monitoring value sequence of the concentration of the nitric oxide of the flue gas are obtained. During specific implementation, the change rule of the monitoring value of the concentration of the nitrogen oxides in the flue gas is determined according to the monitoring value of the oxygen content in the flue gas and the monitoring value of the concentration of the nitrogen oxides in the flue gas. In the embodiment, firstly, according to the flue gas oxygen content monitoring value and the flue gas oxygen content reference value, the flue gas nitrogen oxide concentration monitoring value is converted into a flue gas nitrogen oxide concentration value corresponding to the flue gas oxygen content reference value. In this embodiment, the monitoring value of the concentration of nitrogen oxide in flue gas can be converted into the concentration value of nitrogen oxide in flue gas with the reference oxygen content of 3%, and the monitoring value of the concentration of nitrogen oxide in flue gas can be converted into the concentration value of nitrogen oxide in flue gas corresponding to the reference value of the oxygen content in flue gas according to the following formula
Wherein x is the concentration value of nitrogen oxide in the flue gas corresponding to the reference value of oxygen content in the flue gas, OBase ofFor flue gases containing oxygenValue of reference of quantity, OFruit of Chinese wolfberryFor monitoring the oxygen content of the flue gas, xFruit of Chinese wolfberryThe concentration monitoring value of the nitrogen oxide in the flue gas is obtained.
And after the flue gas nitrogen oxide concentration monitoring value is converted into a flue gas nitrogen oxide concentration value corresponding to the flue gas oxygen content reference value, determining the change rule of the flue gas nitrogen oxide concentration monitoring value according to the converted flue gas nitrogen oxide concentration value. In an embodiment, determining the change rule of the monitoring value of the concentration of nitrogen oxides in flue gas according to the monitoring value of the oxygen content in flue gas and the monitoring value of the concentration of nitrogen oxides in flue gas may include: and performing linear fitting on the smoke nitrogen oxide concentration monitoring value sequence to determine the slope of a fitting straight line. After the monitoring value of the concentration of the nitrogen oxides in the flue gas at each moment is converted, the concentration value of the nitrogen oxides in the flue gas corresponding to the reference value of the oxygen content in the flue gas at each moment is obtained, so that a sequence of the concentration values of the nitrogen oxides in the flue gas corresponding to the reference value of the oxygen content in the flue gas is obtained, and the concentration value of the nitrogen oxides in the flue gas corresponding to the reference value of the oxygen content in the flue gas at t moment can be represented as xtThe concentration value sequence of the nitrogen oxide in the flue gas corresponding to the reference value of the oxygen content in the flue gas can be expressed as x1，x2，...，xt,.... For time t, x is selectedt，xt-1，xt-2，...，xt+1-nFitting a straight line at n points to determine the slope k of the fitted straight line at time tt，xtAnd k istOne-to-one correspondence is obtained, and then the value corresponding to each moment on the fitting straight line at the moment t can be obtained
Where b is greater than t and b is an integer. For each time, the slope of a different fitted straight line, i.e. k, can be obtainedn，kn+1，kn+2，...，kt,., so as to obtain the value corresponding to each time on the fitting straight line of each time
Where b is greater than t and b is an integer.
During the concrete implementation, according to the change law of flue gas nitrogen oxide concentration monitoring value and the emission limit value of flue gas nitrogen oxide, carry out the early warning, include: and early warning is carried out according to the slope of the fitting straight line and the emission limit value of the nitrogen oxide in the flue gas. The traditional early warning methods all consider the influence of the diffusion process of water quality or air pollution and the distribution condition of pollutants on the monitoring of the water quality or the air pollutants, and the methods have high early warning accuracy on the water quality or the air pollutants, but the analysis and operation processes of the influence of the diffusion process of the pollution and the distribution condition of the pollutants on the monitoring of the pollutants are very complicated, consume a large amount of time, and cannot realize the quick early warning of the pollutants. In the embodiment of the invention, the influence of the diffusion process and the distribution condition of the atmospheric pollutants on the monitoring of the atmospheric pollutants is not required to be considered, the possibility that the pollution of the refining device exceeds the standard in the next stage is predicted only by empirical analysis of the existing data, so that the adjustment of the production operation parameters at the front end of the refining device is guided, the phenomenon that a large amount of time is consumed due to the influence of the analysis of the diffusion process and the distribution condition of the pollutants on the monitoring of the pollutants is avoided, the analysis and operation processes are simplified on the basis of ensuring accurate early warning, and the timely early warning before the pollutant emission of the refining device exceeds the standard is realized.
In this embodiment, according to the slope of the fitting straight line and the emission limit value of the flue gas nitrogen oxide, early warning is performed, including:
when x istWhen the temperature is more than or equal to Thd, directly alarming;
when x ist< Thd and ktWhen the pressure is higher than 0, the pressure is higher,
if it is
An early warning is provided;
if it is
And is
An early warning is provided;
the other conditions do not give out early warning, the monitoring value of the concentration of the nitrogen oxides in the flue gas at the next moment is continuously observed,
wherein xtIs a monitoring value of the concentration of the nitrogen oxide in the flue gas, Thd is a limit value of the emission of the nitrogen oxide in the flue gas, ktThe slope of the straight line is fitted for time t,
is the value of the fitted line at time t + 1.
According to the embodiment of the invention, the change rule of the flue gas nitrogen oxide concentration monitoring value is determined by acquiring the online monitoring data of the tail gas pollutants at the discharge port of the refining device and according to the flue gas oxygen content monitoring value and the flue gas nitrogen oxide concentration monitoring value included in the online monitoring data, and then the early warning is carried out according to the change rule of the flue gas nitrogen oxide concentration monitoring value and the discharge limit value of the flue gas nitrogen oxide. The embodiment of the invention only analyzes the online monitoring data of the refining device atmospheric pollutant discharge port, does not relate to the atmospheric pollutant diffusion process and the atmospheric pollutant distribution condition, does not need to consider the influence of the atmospheric pollutant diffusion process and the atmospheric pollutant distribution condition on the monitoring of the atmospheric pollutants, avoids the consumption of a large amount of time due to the influence of the analysis of the pollution diffusion process and the pollutant distribution condition on the pollutant monitoring, simplifies the analysis and operation processes on the basis of ensuring accurate early warning, and realizes the timely early warning before the pollutant discharge of the refining device exceeds the standard.
Based on the same inventive concept, the embodiment of the invention also provides another refinery device tail gas pollutant online monitoring data early warning method, which is described in the following embodiment. Because the principles for solving the problems are similar to the method for the online monitoring data early warning of the refinery device tail gas pollutants, the implementation of the method can be referred to the implementation of the method, and repeated parts are not described again.
Fig. 2 is a schematic diagram of another refinery apparatus exhaust pollutant on-line monitoring data early warning method in the embodiment of the present invention, as shown in fig. 2, the method includes:
step 202, determining a change rule of the monitoring value of the concentration of the sulfur dioxide in the flue gas according to the monitoring value of the oxygen content in the flue gas and the monitoring value of the concentration of the sulfur dioxide in the flue gas;
and 203, early warning is carried out according to the change rule of the monitoring value of the concentration of the sulfur dioxide in the flue gas and the emission limit value of the sulfur dioxide in the flue gas.
In one embodiment, determining the change rule of the monitoring value of the concentration of sulfur dioxide in flue gas according to the monitoring value of the oxygen content in flue gas and the monitoring value of the concentration of sulfur dioxide in flue gas comprises:
converting the monitoring value of the sulfur dioxide concentration of the flue gas into a corresponding concentration value of the sulfur dioxide concentration of the flue gas according to the monitoring value of the oxygen content of the flue gas and the reference value of the oxygen content of the flue gas;
and determining the change rule of the monitoring value of the concentration of the sulfur dioxide in the flue gas according to the converted concentration value of the sulfur dioxide in the flue gas.
In one embodiment, the monitoring value of the sulfur dioxide concentration in the flue gas is converted into the corresponding concentration value of the sulfur dioxide in the flue gas corresponding to the reference value of the oxygen content in the flue gas according to the following formula:
wherein x' is the concentration value of sulfur dioxide in the flue gas corresponding to the reference value of oxygen content in the flue gas, OBase ofIs a reference value of oxygen content in the flue gas, OFruit of Chinese wolfberryIs a monitoring value of the oxygen content of the flue gas, x'Fruit of Chinese wolfberryThe concentration of the sulfur dioxide in the flue gas is a monitoring value.
In one embodiment, determining the change rule of the monitoring value of the concentration of sulfur dioxide in flue gas according to the monitoring value of the oxygen content in flue gas and the monitoring value of the concentration of sulfur dioxide in flue gas comprises:
performing linear fitting on the monitoring value sequence of the sulfur dioxide concentration of the flue gas, and determining the slope of a fitting straight line;
according to the change law of flue gas sulfur dioxide concentration monitoring value and flue gas sulfur dioxide's emission limit value, carry out the early warning, include:
and early warning is carried out according to the slope of the fitting straight line and the emission limit value of the sulfur dioxide in the flue gas.
In one embodiment, the early warning is performed according to the slope of the fitting straight line and the emission limit value of the sulfur dioxide in the flue gas, and comprises the following steps:
x'tWhen the temperature is more than or equal to Thd', directly alarming;
x't< Thd' and ktWhen the pressure is higher than 0, the pressure is higher,
if it is
An early warning is provided;
if it is
And is
An early warning is provided;
the other conditions do not give out early warning, the monitoring value of the concentration of the sulfur dioxide in the flue gas at the next moment is continuously observed,
wherein x'tIs a monitoring value of the concentration of the sulfur dioxide in the flue gas, Thd' is a discharge limit value of the sulfur dioxide in the flue gas, ktThe slope of the straight line is fitted for time t,
is the value of the fitted line at time t + 1.
A specific embodiment is given below to illustrate a specific application of another refinery unit exhaust pollutant online monitoring data early warning method in the embodiment of the present invention. In this embodiment, the likelihood of an exhaust pollutant being out of compliance is predicted from on-line monitoring data of the exhaust pollutant at the refinery. Firstly, acquiring 14 moments of tail gas pollutant online monitoring data of a discharge port of a refining device, wherein the online monitoring data comprise 14 moments of flue gas oxygen content monitoring values and 14 moments of flue gas sulfur dioxide concentration monitoring values. Then, according to the monitoring value of the oxygen content of the flue gas and the reference value of the oxygen content of the flue gas, the monitoring value of the sulfur dioxide concentration of the flue gas is converted into the concentration value of the sulfur dioxide of the flue gas corresponding to the reference value of the oxygen content of the flue gas, wherein the monitoring value of the sulfur dioxide concentration of the flue gas is converted into the concentration value of the sulfur dioxide of the flue gas with the reference oxygen content of 3 percent, and the monitoring value of the sulfur dioxide concentration of the flue gas is converted into the concentration value of the sulfur dioxide of the flue gas corresponding to the reference value of the oxygen content of the flue gas according to the following formula
Wherein x' is the concentration value of sulfur dioxide in the flue gas corresponding to the reference value of oxygen content in the flue gas, OBase ofIs a reference value of oxygen content in the flue gas, OFruit of Chinese wolfberryIs a monitoring value of the oxygen content of the flue gas, x'Fruit of Chinese wolfberryThe concentration of the sulfur dioxide in the flue gas is a monitoring value.
And after the monitoring value of the sulfur dioxide concentration in the flue gas is converted into the corresponding concentration value of the sulfur dioxide in the flue gas corresponding to the reference value of the oxygen content in the flue gas, determining the change rule of the monitoring value of the sulfur dioxide concentration in the flue gas according to the converted concentration value of the sulfur dioxide in the flue gas. If the flue gas sulfur dioxide concentration value corresponding to the flue gas oxygen content reference value at each moment is obtained after the flue gas sulfur dioxide concentration monitoring value at each moment in 14 moments is converted, so as to obtain a flue gas sulfur dioxide concentration value sequence corresponding to the flue gas oxygen content reference value, the flue gas sulfur dioxide concentration value corresponding to the flue gas oxygen content reference value at t moment can be expressed as x'tThe sequence of the concentration value of the sulfur dioxide in the flue gas corresponding to the reference value of the oxygen content in the flue gas can be expressed as x'1，x′2，...，x′t，...，x′14. For time t, selecting x't，x′t-1，x′t-2Fitting the straight line by 3 points in total to determine the slope k of the fitted straight line at the moment tt，x′tAnd k istOne-to-one correspondence is obtained, and then the value corresponding to each moment on the fitting straight line at the moment t can be obtained
Where b is greater than t and b is an integer. For each time, the slope of a different fitted straight line, i.e. k, can be obtained3，k4，...，k14As shown in Table 1, the respective times can be obtainedValue corresponding to each moment on the fitted straight line
TABLE 1 flue gas sulfur dioxide concentration value corresponding to flue gas oxygen content reference value of refining device at 14 moments and slope of fitting straight line
According to the change law of flue gas sulfur dioxide concentration monitoring value and the emission limit value of flue gas sulfur dioxide, carry out the early warning, include: and early warning is carried out according to the slope of the fitting straight line and the emission limit value of the sulfur dioxide in the flue gas. In this example, the emission limit of sulfur dioxide in flue gas is 100mg/m3It can be seen that the concentration value of sulfur dioxide in the flue gas corresponding to the reference value of the oxygen content in the flue gas is less than 100mg/m from time 3 to time 83The slope of the fitting straight line is a negative value, the possibility of exceeding the standard at the next moment does not exist, and an early warning signal is not provided; at the moment 9, the concentration value of the sulfur dioxide in the flue gas corresponding to the reference value of the oxygen content in the flue gas is still less than 100mg/m3However, the slope of the fitting straight line is a positive value, observation is kept, data at the moment 10 are continuously estimated, and an early warning signal is not provided; at the moment 10, the concentration value of the sulfur dioxide in the flue gas corresponding to the reference value of the oxygen content in the flue gas is less than 100mg/m3However, the slope of the fitting straight line obtained by the flue gas sulfur dioxide concentration values corresponding to the flue gas oxygen content reference values at the moment and the first two moments is 20.2, the numerical value at the moment 11 is larger, and the fitting straight line is used for predicting that the flue gas sulfur dioxide concentration at the next 1 time point (the moment 12) is larger than the limit value of 100mg/m3At the moment, the device gives out early warning to avoid the situation that the concentration value of the sulfur dioxide in the flue gas corresponding to the oxygen content reference value of the flue gas at the moment 11 exceeds 100mg/m3The situation of (2) occurs. At the time of 12 to 14, the concentration value of sulfur dioxide in the flue gas corresponding to the reference value of the oxygen content of the flue gas is less than 100mg/m3The slope of the fitting straight line is low or negative, the possibility that the concentration of the smoke pollutants exceeds the standard at the next moment does not exist, and the early warning of the device is relieved.
According to the embodiment of the invention, the change rule of the monitoring value of the concentration of the sulfur dioxide in the flue gas is determined by acquiring the online monitoring data of the tail gas pollutants at the discharge port of the refining device and according to the monitoring value of the oxygen content in the flue gas and the monitoring value of the concentration of the sulfur dioxide in the flue gas which are included in the online monitoring data, and then the early warning is carried out according to the change rule of the monitoring value of the concentration of the sulfur dioxide in the flue gas and the discharge limit value of the sulfur dioxide in the flue gas. The embodiment of the invention only analyzes the online monitoring data of the refining device atmospheric pollutant discharge port, does not relate to the atmospheric pollutant diffusion process and the atmospheric pollutant distribution condition, does not need to consider the influence of the atmospheric pollutant diffusion process and the atmospheric pollutant distribution condition on the monitoring of the atmospheric pollutants, avoids the consumption of a large amount of time due to the influence of the analysis of the pollution diffusion process and the pollutant distribution condition on the pollutant monitoring, simplifies the analysis and operation processes on the basis of ensuring accurate early warning, and realizes the timely early warning before the pollutant discharge of the refining device exceeds the standard.
Based on the same inventive concept, the embodiment of the invention also provides an on-line monitoring data early warning device for the refinery device tail gas pollutants, which is described in the following embodiment. Because the principles for solving the problems are similar to the online monitoring data early warning method for the off-gas pollutants of the refining device, the implementation of the device can refer to the implementation of the method, and repeated parts are not described again.
Fig. 3 is a structural diagram of an online monitoring data early warning device for exhaust pollutants of a refining and chemical device in an embodiment of the invention, and as shown in fig. 3, the device includes:
the data acquisition module 301 is used for acquiring online monitoring data of tail gas pollutants at a discharge port of the refining device, wherein the online monitoring data comprises a flue gas oxygen content monitoring value and a flue gas nitrogen oxide concentration monitoring value;
the change rule determining module 302 is used for determining the change rule of the flue gas nitrogen oxide concentration monitoring value according to the flue gas oxygen content monitoring value and the flue gas nitrogen oxide concentration monitoring value;
and the early warning module 303 is used for early warning according to the change rule of the flue gas nitrogen oxide concentration monitoring value and the emission limit value of the flue gas nitrogen oxide.
In one embodiment, the change rule determining module 302 is further configured to:
converting the monitoring value of the concentration of the nitrogen oxides in the flue gas into a concentration value of the nitrogen oxides in the flue gas corresponding to the reference value of the oxygen content in the flue gas according to the monitoring value of the oxygen content in the flue gas and the reference value of the oxygen content in the flue gas;
and determining the change rule of the monitoring value of the concentration of the nitrogen oxides in the flue gas according to the converted concentration value of the nitrogen oxides in the flue gas.
In one embodiment, the change rule determining module 302 is further configured to:
performing linear fitting on the smoke nitrogen oxide concentration monitoring value sequence to determine the slope of a fitting straight line;
according to the change law of flue gas nitrogen oxide concentration monitoring value and the emission limit value of flue gas nitrogen oxide, carry out the early warning, include:
and early warning is carried out according to the slope of the fitting straight line and the emission limit value of the nitrogen oxide in the flue gas.
According to the embodiment of the invention, the change rule of the flue gas nitrogen oxide concentration monitoring value is determined by acquiring the online monitoring data of the tail gas pollutants at the discharge port of the refining device and according to the flue gas oxygen content monitoring value and the flue gas nitrogen oxide concentration monitoring value included in the online monitoring data, and then the early warning is carried out according to the change rule of the flue gas nitrogen oxide concentration monitoring value and the discharge limit value of the flue gas nitrogen oxide. The embodiment of the invention only analyzes the online monitoring data of the refining device atmospheric pollutant discharge port, does not relate to the atmospheric pollutant diffusion process and the atmospheric pollutant distribution condition, does not need to consider the influence of the atmospheric pollutant diffusion process and the atmospheric pollutant distribution condition on the monitoring of the atmospheric pollutants, avoids the consumption of a large amount of time due to the influence of the analysis of the pollution diffusion process and the pollutant distribution condition on the pollutant monitoring, simplifies the analysis and operation processes on the basis of ensuring accurate early warning, and realizes the timely early warning before the pollutant discharge of the refining device exceeds the standard.
Based on the same inventive concept, the embodiment of the invention also provides another refining device tail gas pollutant online monitoring data early warning device, which is described in the following embodiment. Because the principles for solving the problems are similar to the online monitoring data early warning method for the off-gas pollutants of the refining device, the implementation of the device can refer to the implementation of the method, and repeated parts are not described again.
Fig. 4 is a structural diagram of another refinery unit exhaust pollutant on-line monitoring data early warning device in the embodiment of the present invention, as shown in fig. 4, the device includes:
the data acquisition module 401 is used for acquiring online monitoring data of tail gas pollutants at a discharge port of the refining device, wherein the online monitoring data comprises a monitoring value of oxygen content in flue gas and a monitoring value of sulfur dioxide concentration in the flue gas;
a change rule determining module 402, configured to determine a change rule of the monitored value of the flue gas sulfur dioxide concentration according to the monitored value of the oxygen content of the flue gas and the monitored value of the flue gas sulfur dioxide concentration;
and the early warning module 403 is configured to perform early warning according to a change rule of the monitored value of the concentration of the flue gas sulfur dioxide and a discharge limit value of the flue gas sulfur dioxide.
In one embodiment, the change rule determining module 402 is further configured to:
converting the monitoring value of the sulfur dioxide concentration of the flue gas into a corresponding concentration value of the sulfur dioxide concentration of the flue gas according to the monitoring value of the oxygen content of the flue gas and the reference value of the oxygen content of the flue gas;
and determining the change rule of the monitoring value of the concentration of the sulfur dioxide in the flue gas according to the converted concentration value of the sulfur dioxide in the flue gas.
In one embodiment, the change rule determining module 402 is further configured to:
performing linear fitting on the monitoring value sequence of the sulfur dioxide concentration of the flue gas, and determining the slope of a fitting straight line;
according to the change law of flue gas sulfur dioxide concentration monitoring value and flue gas sulfur dioxide's emission limit value, carry out the early warning, include:
and early warning is carried out according to the slope of the fitting straight line and the emission limit value of the sulfur dioxide in the flue gas.
According to the embodiment of the invention, the change rule of the monitoring value of the concentration of the sulfur dioxide in the flue gas is determined by acquiring the online monitoring data of the tail gas pollutants at the discharge port of the refining device and according to the monitoring value of the oxygen content in the flue gas and the monitoring value of the concentration of the sulfur dioxide in the flue gas which are included in the online monitoring data, and then the early warning is carried out according to the change rule of the monitoring value of the concentration of the sulfur dioxide in the flue gas and the discharge limit value of the sulfur dioxide in the flue gas. The embodiment of the invention only analyzes the online monitoring data of the refining device atmospheric pollutant discharge port, does not relate to the atmospheric pollutant diffusion process and the atmospheric pollutant distribution condition, does not need to consider the influence of the atmospheric pollutant diffusion process and the atmospheric pollutant distribution condition on the monitoring of the atmospheric pollutants, avoids the consumption of a large amount of time due to the influence of the analysis of the pollution diffusion process and the pollutant distribution condition on the pollutant monitoring, simplifies the analysis and operation processes on the basis of ensuring accurate early warning, and realizes the timely early warning before the pollutant discharge of the refining device exceeds the standard.
In summary, in the embodiment of the present invention, the online monitoring data of the exhaust pollutants at the discharge port of the refining device is obtained, and then the variation rule of the monitoring value of the concentration of the flue gas pollutants is determined according to the monitoring value of the oxygen content in the flue gas and the monitoring value of the concentration of the flue gas pollutants included in the online monitoring data, so as to perform the early warning according to the variation rule of the monitoring value of the concentration of the flue gas pollutants and the discharge limit value of the flue gas pollutants. The embodiment of the invention only analyzes the online monitoring data of the refining device atmospheric pollutant discharge port, does not relate to the atmospheric pollutant diffusion process and the atmospheric pollutant distribution condition, does not need to consider the influence of the atmospheric pollutant diffusion process and the atmospheric pollutant distribution condition on the monitoring of the atmospheric pollutants, avoids the consumption of a large amount of time due to the influence of the analysis of the pollution diffusion process and the pollutant distribution condition on the pollutant monitoring, simplifies the analysis and operation processes on the basis of ensuring accurate early warning, and realizes the timely early warning before the pollutant discharge of the refining device exceeds the standard. In the embodiment, the influence of the diffusion process and the distribution condition of the atmospheric pollutants on the monitoring of the atmospheric pollutants is not required to be considered, and the possibility that the pollution of the refining device exceeds the standard in the next stage is predicted only by empirical analysis of the existing data, so that the adjustment of the production operation parameters at the front end of the refining device is guided.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. An on-line monitoring data early warning method for refinery device tail gas pollutants is characterized by comprising the following steps:
acquiring online monitoring data of tail gas pollutants at a discharge port of a refining device, wherein the online monitoring data comprises a flue gas oxygen content monitoring value and a flue gas nitrogen oxide concentration monitoring value;
according to flue gas oxygen content monitoring value and flue gas nitrogen oxide concentration monitoring value, confirm the change law of flue gas nitrogen oxide concentration monitoring value, include: converting the monitoring value of the concentration of the nitrogen oxides in the flue gas into a concentration value of the nitrogen oxides in the flue gas corresponding to the reference value of the oxygen content in the flue gas according to the monitoring value of the oxygen content in the flue gas and the reference value of the oxygen content in the flue gas; determining the change rule of the monitoring value of the concentration of the nitrogen oxides in the flue gas according to the converted concentration value of the nitrogen oxides in the flue gas; performing linear fitting on the smoke nitrogen oxide concentration monitoring value sequence to determine the slope of a fitting straight line;
according to the change law of flue gas nitrogen oxide concentration monitoring value and the emission limit value of flue gas nitrogen oxide, carry out the early warning, include: according to the slope of the fitting straight line and the emission limit value of the nitrogen oxides in the flue gas, early warning is carried out, wherein the early warning is carried out according to the slope of the fitting straight line and the emission limit value of the nitrogen oxides in the flue gas, and the early warning comprises the following steps:
when x istWhen the temperature is more than or equal to Thd, directly alarming;
when x ist< Thd and ktWhen the pressure is higher than 0, the pressure is higher,
if it is
An early warning is provided;
if it is
And is
An early warning is provided;
the other conditions do not give out early warning, the monitoring value of the concentration of the nitrogen oxides in the flue gas at the next moment is continuously observed,
wherein xtIs a monitoring value of the concentration of the nitrogen oxide in the flue gas, Thd is a limit value of the emission of the nitrogen oxide in the flue gas, ktThe slope of the straight line is fitted for time t,
is the value of the fitted line at time t + 1.
2. The method of claim 1, wherein the flue gas nitrogen oxide concentration monitoring value is converted into a flue gas nitrogen oxide concentration value corresponding to a flue gas oxygen content reference value according to the following formula:
wherein x is the concentration value of nitrogen oxide in the flue gas corresponding to the reference value of oxygen content in the flue gas, OBase ofIs a reference value of oxygen content in the flue gas, OFruit of Chinese wolfberryFor monitoring the oxygen content of the flue gas, xFruit of Chinese wolfberryThe concentration monitoring value of the nitrogen oxide in the flue gas is obtained.
3. An on-line monitoring data early warning method for refinery device tail gas pollutants is characterized by comprising the following steps:
acquiring online monitoring data of tail gas pollutants at a discharge port of a refining device, wherein the online monitoring data comprises a monitoring value of oxygen content in flue gas and a monitoring value of sulfur dioxide concentration in the flue gas;
according to flue gas oxygen content monitoring value and flue gas sulfur dioxide concentration monitoring value, confirm the change law of flue gas sulfur dioxide concentration monitoring value, include: converting the monitoring value of the sulfur dioxide concentration of the flue gas into a corresponding concentration value of the sulfur dioxide concentration of the flue gas according to the monitoring value of the oxygen content of the flue gas and the reference value of the oxygen content of the flue gas; determining the change rule of the monitoring value of the concentration of the sulfur dioxide in the flue gas according to the converted concentration value of the sulfur dioxide in the flue gas; performing linear fitting on the monitoring value sequence of the sulfur dioxide concentration of the flue gas, and determining the slope of a fitting straight line;
according to the change law of flue gas sulfur dioxide concentration monitoring value and the emission limit value of flue gas sulfur dioxide, carry out the early warning, include: and early warning is carried out according to the slope of the fitting straight line and the emission limit value of the flue gas sulfur dioxide, wherein the early warning is carried out according to the slope of the fitting straight line and the emission limit value of the flue gas sulfur dioxide, and the early warning comprises the following steps:
x'tWhen the temperature is more than or equal to Thd', directly alarming;
x't< Thd' and ktWhen the pressure is higher than 0, the pressure is higher,
if it is
An early warning is provided;
if it is
And is
An early warning is provided;
the other conditions do not give out early warning, the monitoring value of the concentration of the sulfur dioxide in the flue gas at the next moment is continuously observed,
wherein x'tIs a monitoring value of the concentration of the sulfur dioxide in the flue gas, Thd' is a discharge limit value of the sulfur dioxide in the flue gas, ktThe slope of the straight line is fitted for time t,
is the value of the fitted line at time t + 1.
4. The method of claim 3, wherein the monitoring value of the sulfur dioxide concentration in the flue gas is converted into the concentration value of the sulfur dioxide in the flue gas corresponding to the reference value of the oxygen content in the flue gas according to the following formula:
wherein x' is the concentration value of sulfur dioxide in the flue gas corresponding to the reference value of oxygen content in the flue gas, OBase ofIs a reference value of oxygen content in the flue gas, OFruit of Chinese wolfberryIs a monitoring value of the oxygen content of the flue gas, x'Fruit of Chinese wolfberryThe concentration of the sulfur dioxide in the flue gas is a monitoring value.
5. The utility model provides a refining device exhaust pollutant on-line monitoring data early warning device which characterized in that includes:
the device comprises a data acquisition module, a data processing module and a data processing module, wherein the data acquisition module is used for acquiring online monitoring data of tail gas pollutants at a discharge port of the refining device, and the online monitoring data comprises a flue gas oxygen content monitoring value and a flue gas nitrogen oxide concentration monitoring value;
the change rule determining module is used for determining the change rule of the flue gas nitrogen oxide concentration monitoring value according to the flue gas oxygen content monitoring value and the flue gas nitrogen oxide concentration monitoring value, and is further used for: converting the monitoring value of the concentration of the nitrogen oxides in the flue gas into a concentration value of the nitrogen oxides in the flue gas corresponding to the reference value of the oxygen content in the flue gas according to the monitoring value of the oxygen content in the flue gas and the reference value of the oxygen content in the flue gas; determining the change rule of the monitoring value of the concentration of the nitrogen oxides in the flue gas according to the converted concentration value of the nitrogen oxides in the flue gas; performing linear fitting on the smoke nitrogen oxide concentration monitoring value sequence to determine the slope of a fitting straight line;
the early warning module for according to the change law of flue gas nitrogen oxide concentration monitoring value and the emission limit value of flue gas nitrogen oxide, carry out the early warning, include: according to the slope of the fitting straight line and the emission limit value of the nitrogen oxides in the flue gas, early warning is carried out, wherein the early warning is carried out according to the slope of the fitting straight line and the emission limit value of the nitrogen oxides in the flue gas, and the early warning comprises the following steps:
when x istWhen the temperature is more than or equal to Thd, directly alarming;
when x ist< Thd and ktWhen the pressure is higher than 0, the pressure is higher,
if it is
An early warning is provided;
if it is
And is
An early warning is provided;
the other conditions do not give out early warning, the monitoring value of the concentration of the nitrogen oxides in the flue gas at the next moment is continuously observed,
wherein xtIs a monitoring value of the concentration of the nitrogen oxide in the flue gas, Thd is a limit value of the emission of the nitrogen oxide in the flue gas, ktThe slope of the straight line is fitted for time t,
is the value of the fitted line at time t + 1.
6. The utility model provides a refining device exhaust pollutant on-line monitoring data early warning device which characterized in that includes:
the data acquisition module is used for acquiring online monitoring data of tail gas pollutants at a discharge port of the refining device, wherein the online monitoring data comprises a flue gas oxygen content monitoring value and a flue gas sulfur dioxide concentration monitoring value;
the change rule determining module is used for determining the change rule of the flue gas sulfur dioxide concentration monitoring value according to the flue gas oxygen content monitoring value and the flue gas sulfur dioxide concentration monitoring value, and is further used for: converting the monitoring value of the sulfur dioxide concentration of the flue gas into a corresponding concentration value of the sulfur dioxide concentration of the flue gas according to the monitoring value of the oxygen content of the flue gas and the reference value of the oxygen content of the flue gas; determining the change rule of the monitoring value of the concentration of the sulfur dioxide in the flue gas according to the converted concentration value of the sulfur dioxide in the flue gas; performing linear fitting on the monitoring value sequence of the sulfur dioxide concentration of the flue gas, and determining the slope of a fitting straight line;
the early warning module is used for carrying out early warning according to the change law of the flue gas sulfur dioxide concentration monitoring value and the emission limit value of the flue gas sulfur dioxide, and comprises: and early warning is carried out according to the slope of the fitting straight line and the emission limit value of the flue gas sulfur dioxide, wherein the early warning is carried out according to the slope of the fitting straight line and the emission limit value of the flue gas sulfur dioxide, and the early warning comprises the following steps:
x'tWhen the temperature is more than or equal to Thd', directly alarming;
x't< Thd' and ktWhen the pressure is higher than 0, the pressure is higher,
if it is
An early warning is provided;
if it is
And is
An early warning is provided;
the other conditions do not give out early warning, the monitoring value of the concentration of the sulfur dioxide in the flue gas at the next moment is continuously observed,
wherein x'tIs a monitoring value of the concentration of the sulfur dioxide in the flue gas, Thd' is a discharge limit value of the sulfur dioxide in the flue gas, ktThe slope of the straight line is fitted for time t,
is the value of the fitted line at time t + 1.
7. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the method of any one of claims 1 to 4 when executing the computer program.
8. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program for executing the method of any one of claims 1 to 4.
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