CN117907546A - Method and system for measuring carbon dioxide emission of coal-fired power plant - Google Patents
Method and system for measuring carbon dioxide emission of coal-fired power plant Download PDFInfo
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 444
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 222
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 222
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 212
- 239000003546 flue gas Substances 0.000 claims abstract description 212
- 238000012937 correction Methods 0.000 claims abstract description 151
- 238000005259 measurement Methods 0.000 claims abstract description 88
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 28
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Abstract
The invention discloses a method and a system for measuring carbon dioxide emission of a coal-fired power plant, which relate to the technical field of carbon dioxide emission measurement of the coal-fired power plant, respond to a carbon dioxide emission measurement request, determine the corresponding initial emission and acquire flue gas data of the coal-fired power plant to be measured through a flue gas acquisition device within a preset measurement time, determine corresponding correction parameters based on an oxygen concentration value, a load value and a preset correction key value pair library of the flue gas data, generate the corresponding emission volume concentration value according to the flue gas data and the correction parameters, determine the corresponding carbon dioxide emission as a new initial emission according to the emission volume concentration value, the flue gas data, the measurement time and the initial emission, and skip the step of acquiring the flue gas data of the coal-fired power plant to be measured through the flue gas acquisition device. The technical problem that the conventional coal-fired power plant is limited by a test instrument and a test method due to fuel property test and cannot provide real-time, accurate and reliable data support for power plant management staff is solved.
Description
Technical Field
The invention relates to the technical field of carbon dioxide emission measurement of coal-fired power plants, in particular to a method and a system for measuring carbon dioxide emission of a coal-fired power plant.
Background
For domestic produced coal-fired power plants, planning carbon emission indexes and accurately calculating carbon emission amount become important working contents of power plant related management staff. At present, the CO 2 emission of a coal-fired power plant is extremely easy to be influenced by factors such as coal sources, blending ratio of coal, fuel combustion level and the like in a combustion process through fossil fuel characteristics, and because fuel characteristic detection is limited by test instruments and methods, real-time, accurate and reliable data support is difficult to provide for power plant management staff, so that a method capable of accurately measuring the CO 2 emission is needed.
Disclosure of Invention
The invention provides a method and a system for measuring carbon dioxide emission of a coal-fired power plant, which solve the technical problems that the CO 2 emission of the existing coal-fired power plant is extremely easy to be influenced by factors such as coal sources, blending ratio of coal, fuel combustion level and the like in the combustion process calculated by fossil fuel characteristics, and the real-time, accurate and reliable data support is difficult to provide for power plant management staff because the fuel characteristic test is limited by test instruments and methods.
The invention provides a method for measuring carbon dioxide emission of a coal-fired power plant, which relates to a coal-fired power plant to be measured, wherein a flue gas collecting device is arranged in a flue of the coal-fired power plant to be measured, and the method comprises the following steps:
Responding to a carbon dioxide emission amount measurement request, determining an initial emission amount corresponding to the carbon dioxide emission amount measurement request, and collecting flue gas data of the coal-fired power plant to be tested through the flue gas collecting device within a preset measurement time;
determining corresponding correction parameters based on an oxygen concentration value, a load value and a preset correction key value pair library of the flue gas data;
Generating a corresponding emission volume concentration value according to the carbon dioxide volume concentration of the flue gas data and the correction parameter;
Determining a corresponding carbon dioxide emission amount according to the emission volume concentration value, the flue gas data, the measurement time and the initial emission amount;
and taking the carbon dioxide emission as a new initial emission, and jumping to execute the step of collecting the flue gas data of the coal-fired power plant to be tested through the flue gas collecting device within the preset measurement time.
Optionally, the step of determining the corresponding correction parameter based on the oxygen concentration value, the load value and the preset correction key value pair library of the flue gas data includes:
Generating a corresponding compound key by adopting an oxygen concentration value and a load value of the flue gas data;
and matching corresponding correction parameters in a preset correction key value pair library according to the composite key.
Optionally, the correction parameters include a first correction parameter and a second correction parameter, and the step of determining a corresponding emission volume concentration value according to the carbon dioxide volume concentration of the flue gas data and the correction parameters includes:
judging whether the carbon dioxide volume concentration of the flue gas data is larger than or equal to the first correction parameter;
If the carbon dioxide volume concentration is smaller than the first correction parameter, taking the first correction parameter as a discharge volume concentration value;
if the carbon dioxide volume concentration is greater than or equal to the first correction parameter, judging that the carbon dioxide volume concentration is less than or equal to the second correction parameter;
if the carbon dioxide volume concentration is larger than the second correction parameter, taking the second correction parameter as a discharge volume concentration value;
And if the carbon dioxide volume concentration is smaller than or equal to the second correction parameter, taking the carbon dioxide volume concentration as a discharge volume concentration value.
Optionally, the method further comprises:
When the volume concentration of the carbon dioxide is smaller than the first correction parameter, adjusting the probe position of the flue gas collection device in a preset adjusting mode;
and when the volume concentration of the carbon dioxide is larger than the second correction parameter, controlling an alarm of the flue gas collection device to be started.
Optionally, the step of generating a corresponding carbon dioxide emission according to the emission volume concentration value, the flue gas data, the measurement time and the initial emission amount includes:
Multiplying the discharge volume concentration value and a preset first characteristic parameter to generate a first multiplied value;
multiplying the first multiplication value and a preset second characteristic parameter to generate a carbon dioxide mass concentration value;
Generating a corresponding carbon dioxide emission rate according to the carbon dioxide mass concentration value and the flue gas data;
multiplying the carbon dioxide emission rate and the measurement time to generate a second multiplied value;
and adding the initial emission amount and the second multiplication value to generate carbon dioxide emission amount.
Optionally, the flue gas data includes flue gas flow rate, flue sectional area, atmospheric pressure, flue gas static pressure, flue gas temperature and flue gas humidity, and the step of generating a corresponding carbon dioxide emission rate according to the carbon dioxide mass concentration value and the flue gas data includes:
adding the flue gas temperature and a preset third characteristic parameter to generate a first sum;
performing ratio processing on the third characteristic parameter and the first sum value to generate a first ratio value;
adding the atmospheric pressure and the static pressure of the flue gas to generate a second sum value;
performing ratio processing on the second sum and a preset fourth characteristic parameter to generate a second ratio;
performing difference processing on a preset fifth characteristic parameter and the flue gas humidity to generate a first difference;
And multiplying the flue gas flow rate, the flue sectional area, the first ratio, the second ratio, the first difference value, the carbon dioxide mass concentration, a preset flow coefficient and a sixth characteristic parameter to generate a carbon dioxide emission rate.
The invention provides a system for measuring carbon dioxide emission of a coal-fired power plant, which relates to a coal-fired power plant to be measured, wherein a flue gas collecting device is arranged in a flue of the coal-fired power plant to be measured, and the system comprises:
The acquisition module is used for responding to the carbon dioxide emission measurement request, determining the initial emission corresponding to the carbon dioxide emission measurement request and acquiring the flue gas data of the coal-fired power plant to be measured through the flue gas acquisition device within the preset measurement time;
The correction module is used for determining corresponding correction parameters based on the oxygen concentration value, the load value and a preset correction key value pair library of the flue gas data;
the volume concentration analysis module is used for generating a corresponding emission volume concentration value according to the carbon dioxide volume concentration of the flue gas data and the correction parameter;
The flue gas analysis module is used for determining the corresponding carbon dioxide emission according to the emission volume concentration value, the flue gas data, the measurement time and the initial emission;
And the jump module is used for taking the carbon dioxide emission as a new initial emission, and jumping to execute the step of collecting the flue gas data of the coal-fired power plant to be tested through the flue gas collecting device within the preset measurement time.
Optionally, the correction module includes:
the composite key sub-module is used for generating a corresponding composite key by adopting the oxygen concentration value and the load value of the flue gas data;
and the matching sub-module is used for matching corresponding correction parameters in a preset correction key value pair library according to the composite key.
Optionally, the correction parameters include a first correction parameter and a second correction parameter, and the volumetric concentration analysis module includes:
The first analysis submodule is used for judging whether the carbon dioxide volume concentration of the flue gas data is larger than or equal to the first correction parameter;
If the carbon dioxide volume concentration is smaller than the first correction parameter, taking the first correction parameter as a discharge volume concentration value;
The second analysis submodule is used for judging that the volume concentration of the carbon dioxide is smaller than or equal to the second correction parameter if the volume concentration of the carbon dioxide is larger than or equal to the first correction parameter;
if the carbon dioxide volume concentration is larger than the second correction parameter, taking the second correction parameter as a discharge volume concentration value;
And if the carbon dioxide volume concentration is smaller than or equal to the second correction parameter, taking the carbon dioxide volume concentration as a discharge volume concentration value.
Optionally, the flue gas analysis module includes:
The first processing submodule is used for multiplying the discharge volume concentration value and a preset first characteristic parameter to generate a first multiplied value;
the second processing submodule is used for multiplying the first multiplication value and a preset second characteristic parameter to generate a carbon dioxide mass concentration value;
the third processing submodule is used for generating a corresponding carbon dioxide emission rate according to the carbon dioxide mass concentration value and the flue gas data;
a fourth processing sub-module, configured to multiply the carbon dioxide emission rate and the measurement time to generate a second multiplied value;
and a fifth processing sub-module, configured to perform addition processing on the initial emission amount and the second multiplier, and generate a carbon dioxide emission amount.
From the above technical scheme, the invention has the following advantages:
Responding to the carbon dioxide emission amount measurement request, determining the initial emission amount corresponding to the carbon dioxide emission amount measurement request, collecting the flue gas data of the coal-fired power plant to be tested through the flue gas collection device within the preset measurement time, determining the corresponding correction parameters based on the oxygen concentration value, the load value and the preset correction key value pair library of the flue gas data, generating the corresponding emission volume concentration value according to the carbon dioxide volume concentration and the correction parameters of the flue gas data, determining the corresponding carbon dioxide emission amount according to the emission volume concentration value, the flue gas data, the measurement time and the initial emission amount, taking the carbon dioxide emission amount as the new initial emission amount, and jumping to execute the step of collecting the flue gas data of the coal-fired power plant to be tested through the flue gas collection device within the preset measurement time. The technical problem that the current coal-fired power plant is difficult to provide real-time, accurate and reliable data support for power plant management staff due to the fact that fuel property detection is limited by test instruments and methods is solved. According to the application, the relation between the oxygen concentration value, the load value and the carbon dioxide volume concentration is utilized to analyze and correct the carbon dioxide volume concentration acquired by the flue gas acquisition device, so that a corrected emission volume concentration value is obtained, and the flue gas data, the initial emission amount and the measurement time are combined to calculate, so that the corresponding carbon dioxide emission amount is generated, and meanwhile, when the carbon dioxide volume concentration is abnormal, the flue gas acquisition device is adjusted, so that the accuracy of measuring the CO 2 emission amount is improved.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a flow chart of steps of a method for measuring carbon dioxide emissions from a coal-fired power plant according to an embodiment of the present invention;
FIG. 2 is a flow chart of steps of a method for measuring carbon dioxide emission of a coal-fired power plant according to a second embodiment of the present invention;
fig. 3 is a block diagram of a system for measuring carbon dioxide emissions from a coal-fired power plant according to a third embodiment of the present invention.
Detailed Description
The embodiment of the invention provides a method and a system for measuring carbon dioxide emission of a coal-fired power plant, which are used for solving the technical problems that the CO 2 emission of the existing coal-fired power plant is extremely easy to be influenced by factors such as coal sources, blending ratio of coal, fuel combustion level and the like in the combustion process calculated by fossil fuel characteristics, and the real-time, accurate and reliable data support is difficult to provide for power plant management staff because the fuel characteristic test is limited by test instruments and methods.
In order to make the objects, features and advantages of the present invention more comprehensible, the technical solutions in the embodiments of the present invention are described in detail below with reference to the accompanying drawings, and it is apparent that the embodiments described below are only some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, fig. 1 is a flowchart illustrating steps of a method for measuring carbon dioxide emissions from a coal-fired power plant according to an embodiment of the present invention.
The invention provides a method for measuring carbon dioxide emission of a coal-fired power plant, which relates to a coal-fired power plant to be measured, wherein a flue gas acquisition device is arranged in a flue of the coal-fired power plant to be measured, and the method comprises the following steps:
The flue gas collection device comprises a flue gas collection and transmission device, a flue gas pretreatment device, an ultrasonic flow measurement system, a greenhouse gas analysis system and a data collection and transmission system, wherein the flue gas pretreatment device comprises a sampling probe, a sample transmission pipeline, flow control equipment, a sampling pump and the like and is used for directly sampling and transmitting flue gas. The flue gas pretreatment device adopts a high-precision compressor and a high heat exchange rate condenser system to pretreat the gas, so that most of water in the sampled gas can be removed, and the concentration loss of components can be effectively reduced by unique design, so that the gas entering the analyzer is ensured to be pure and dry. The condenser is made of high-precision silicon wafer, and the temperature of the cold trap is controlled below 4 ℃. The cold trap has exquisite design and reliable performance, can ensure continuous fault-free operation under severe field conditions, and ensures that the sampling analysis of the system is not distorted in the drainage process. The greenhouse gas analysis system is used for measuring and analyzing the collected flue gas, and the strong anti-interference and high-precision measurement of the gas components are realized through a preferable filter wave band and an electrically modulated light source and through a non-dispersive infrared technology (NDIR). And (5) analyzing and testing the CO 2 component in the flue gas.
And step 101, responding to the carbon dioxide emission amount measurement request, determining the initial emission amount corresponding to the carbon dioxide emission amount measurement request, and collecting the flue gas data of the coal-fired power plant to be tested through the flue gas collecting device within the preset measurement time.
The flue gas data refers to flue gas components discharged by a fixed pollution source of a coal-fired power plant to be detected and basic parameters of a flue of the coal-fired power plant to be detected, including but not limited to flue gas flow rate, flue sectional area, atmospheric pressure, flue gas static pressure, flue gas temperature, carbon dioxide volume concentration, oxygen concentration value, load value, flue gas humidity and the like, are collected at measurement time by a flue gas collecting device.
In the embodiment of the invention, the initial emission corresponding to the carbon dioxide emission measurement request is obtained in response to the carbon dioxide emission measurement request, and the flue gas data of the coal-fired power plant to be measured is acquired through the flue gas acquisition device within the preset measurement time.
Step 102, determining corresponding correction parameters based on an oxygen concentration value, a load value and a preset correction key value pair library of the flue gas data.
Correction parameters refer to the maximum and minimum values of carbon dioxide volume concentration under the constraint of oxygen concentration value and load value.
In the embodiment of the invention, the oxygen concentration value and the load value of the flue gas data are input into a preset correction key value pair library as a compound key, and the corresponding first correction parameter and second correction parameter are matched.
Step 103, generating a corresponding emission volume concentration value according to the carbon dioxide volume concentration of the flue gas data and the correction parameters;
In the embodiment of the invention, whether the carbon dioxide volume concentration of the flue gas data is in a correction interval [ first correction parameter, second correction parameter ] constructed by the first correction parameter and the second correction parameter is judged, when the carbon dioxide volume concentration is in the correction interval, the carbon dioxide volume concentration is taken as an emission volume concentration value, when the carbon dioxide volume concentration is not in the correction interval, whether the carbon dioxide volume concentration is larger than the first correction parameter is judged, when the carbon dioxide volume concentration is smaller than the first correction parameter, the position and the posture of a sampling probe of the flue gas acquisition device are regulated according to a preset regulation mode, the first correction parameter is taken as the emission volume concentration value, and when the carbon dioxide volume concentration is larger than the first correction parameter, an alarm unit of the flue gas acquisition device is controlled to start to inform maintenance personnel to overhaul, and the second correction parameter is taken as the emission volume concentration value.
104, Determining the corresponding carbon dioxide emission according to the emission volume concentration value, the flue gas data, the measurement time and the initial emission;
In an embodiment of the invention, the volumetric concentration value will be discharged. And inputting the flue gas data, the measurement time and the initial emission into a preset emission analysis model to obtain the corresponding carbon dioxide emission.
The emission amount analysis model is specifically:
Bh＝Eh*th+B；
Eh＝cd×Qsn×10-6；
Wherein c s is the discharge volume concentration value, E h is the carbon dioxide discharge rate, t h is the measurement time, B is the initial discharge amount, B h is the carbon dioxide discharge amount, c d is the CO 2 dry basis mass concentration in the standard state, Q sn is the dry flue gas volume flow in the standard state, Q s is the wet flue gas volume flow in the actual working condition, t s is the flue gas temperature, p atm is the atmospheric pressure, p s is the static pressure of the flue gas, X sw is the moisture content of the flue gas, A is the flue sectional area, For determining the average flow velocity of the wet flue gas of the section, K v is the flow coefficient,/>Is the average flow rate of the flue gas.
And 105, taking the carbon dioxide emission amount as a new initial emission amount, and jumping to execute the step of collecting the flue gas data of the coal-fired power plant to be tested through the flue gas collecting device within a preset measurement time.
In the embodiment of the invention, the carbon dioxide emission is taken as the new initial emission at the current moment, and the step of collecting the flue gas data of the coal-fired power plant to be tested through the flue gas collecting device in the preset measuring time is skipped.
In the embodiment of the application, an initial emission amount corresponding to a carbon dioxide emission amount measurement request is determined in response to the carbon dioxide emission amount measurement request, flue gas data of a coal-fired power plant to be measured is acquired through a flue gas acquisition device within a preset measurement time, corresponding correction parameters are determined based on an oxygen concentration value, a load value and a preset correction key value pair library of the flue gas data, a corresponding emission volume concentration value is generated according to the carbon dioxide volume concentration and the correction parameters of the flue gas data, the corresponding carbon dioxide emission amount is determined according to the emission volume concentration value, the flue gas data, the measurement time and the initial emission amount, and the step of acquiring the flue gas data of the coal-fired power plant to be measured through the flue gas acquisition device is skipped to be executed in the preset measurement time. The technical problem that the current coal-fired power plant is difficult to provide real-time, accurate and reliable data support for power plant management staff due to the fact that fuel property detection is limited by test instruments and methods is solved. According to the application, the relation between the oxygen concentration value, the load value and the carbon dioxide volume concentration is utilized to analyze and correct the carbon dioxide volume concentration acquired by the flue gas acquisition device, so that a corrected emission volume concentration value is obtained, and the flue gas data, the initial emission amount and the measurement time are combined to calculate, so that the corresponding carbon dioxide emission amount is generated, and meanwhile, when the carbon dioxide volume concentration is abnormal, the flue gas acquisition device is adjusted, so that the accuracy of measuring the CO 2 emission amount is improved.
Referring to fig. 2, fig. 2 is a flowchart illustrating steps of a method for measuring carbon dioxide emissions from a coal-fired power plant according to a second embodiment of the present invention.
The invention provides a method for measuring carbon dioxide emission of a coal-fired power plant, which relates to a coal-fired power plant to be measured, wherein a flue gas acquisition device is arranged in a flue of the coal-fired power plant to be measured, and the method comprises the following steps:
Step 201, responding to a carbon dioxide emission amount measurement request, determining an initial emission amount corresponding to the carbon dioxide emission amount measurement request, and collecting flue gas data of a coal-fired power plant to be tested through a flue gas collecting device within a preset measurement time.
It is worth mentioning that the greenhouse gas analysis system of the flue gas collection device has a temperature compensation function, is suitable for measurement at different environmental temperatures, and has high system reliability, strong anti-interference capability and low failure rate. The physical interference reduction characteristic is realized through the optimized wavelength, and the corrosion resistance and the airflow stability of the passivated gas Chi Digao are improved, so that the signal stability is enhanced. The system has high measurement accuracy, simple and convenient operation and simple maintenance.
It is worth mentioning that the flow measurement system of the flue gas collection device calculates the gas flow rate through the ultrasonic transducers arranged on two sides of the pipeline, and the specific working principle is that the ultrasonic transducers are arranged on two sides of the pipeline alternately as a transmitter and a receiver, the acceleration and deceleration effects of the gas flow rate on the ultrasonic pulses change the transmission time of the ultrasonic pulses, the same-direction transmission time is shortened, and the reverse transmission time is increased. The gas flow rate is calculated by the transit time difference.
In the embodiment of the invention, when the carbon dioxide emission amount measurement request is received, the initial emission amount corresponding to the carbon dioxide emission amount measurement request is obtained, and the flue gas acquisition device is controlled to acquire the flue gas data of the coal-fired power plant to be measured within the preset measurement time.
And 202, generating a corresponding compound key by adopting an oxygen concentration value and a load value of the flue gas data.
The compound key is a key composed of event feature data input to the correction key value pair library. Wherein the event characteristic data may include an oxygen concentration value and a load value.
In the embodiment of the invention, the oxygen concentration value and the load value of the flue gas data are used as a compound key.
Step 203, matching corresponding correction parameters in a preset correction key value pair library according to the compound key.
In the embodiment of the invention, the composite key is input into a preset correction key value pair library to obtain a corresponding key value, and the corresponding correction parameters of the coal-fired power plant to be detected are matched according to the key value.
Under the condition that the fuel is relatively stable, the oxygen concentration value and the load value of the coal-fired power plant to be detected have a certain change relation with the carbon dioxide volume concentration, the oxygen concentration value and the load value can be input into a preset correction key value pair library, and the concentration change range of the carbon dioxide volume concentration at the current moment can be deduced according to the mapping relation between the compound key and the carbon dioxide volume concentration.
Step 204, generating a corresponding emission volume concentration value according to the carbon dioxide volume concentration of the flue gas data and the correction parameters;
further, the correction parameters include a first correction parameter and a second correction parameter, and step 204 includes the sub-steps of:
the first correction parameter refers to the minimum concentration value of the carbon dioxide volume concentration change range of the coal-fired power plant to be measured at the current moment.
And the second correction parameter refers to the concentration maximum value of the carbon dioxide volume concentration change range of the coal-fired power plant to be measured at the current moment.
And S11, judging whether the carbon dioxide volume concentration of the flue gas data is larger than or equal to the first correction parameter.
In the embodiment of the invention, whether the carbon dioxide volume concentration of the flue gas data is larger than or equal to the concentration minimum value is judged.
And S12, if the carbon dioxide volume concentration is smaller than the first correction parameter, taking the first correction parameter as a discharge volume concentration value.
In the embodiment of the invention, if the volume concentration of the carbon dioxide is smaller than the concentration minimum value, the concentration minimum value is taken as the discharge volume concentration value.
And S13, if the volume concentration of the carbon dioxide is larger than or equal to the first correction parameter, judging that the volume concentration of the carbon dioxide is smaller than or equal to the second correction parameter.
In the embodiment of the invention, when the volume concentration of the carbon dioxide is greater than or equal to the concentration minimum value, the volume concentration of the carbon dioxide is judged to be less than or equal to the concentration maximum value.
And S14, if the carbon dioxide volume concentration is larger than the second correction parameter, taking the second correction parameter as a discharge volume concentration value.
In the embodiment of the invention, if the volume concentration of the carbon dioxide is greater than the concentration maximum value, the concentration maximum value is taken as the discharge volume concentration value.
And S15, if the carbon dioxide volume concentration is smaller than or equal to the second correction parameter, taking the carbon dioxide volume concentration as a discharge volume concentration value.
In the embodiment of the invention, when the carbon dioxide volume concentration is less than or equal to the concentration maximum value, the carbon dioxide volume concentration is taken as the discharge volume concentration value.
Further, S21-S22:
and S21, when the volume concentration of the carbon dioxide is smaller than the first correction parameter, adjusting the probe position of the flue gas collection device in a preset adjusting mode.
In the embodiment of the invention, when the volume concentration of the carbon dioxide is smaller than the minimum concentration value, the deviation of the data information acquired by the acquisition probes is indicated, and the central axes of the probes of the flue gas acquisition device are adjusted to be in the center of the flow section and are consistent with the flow line direction.
It is worth mentioning that the flue gas collection device analyzes the volume concentration of carbon dioxide by a non-dispersive infrared absorption method.
And S22, when the volume concentration of the carbon dioxide is larger than the second correction parameter, controlling an alarm of the flue gas collection device to be started.
In the embodiment of the invention, when the volume concentration of the carbon dioxide is greater than the maximum concentration value, the condition that the refrigerator or peristaltic pump of the smoke collection device is abnormal is indicated, and an alarm for controlling the smoke collection device is started to inform operation and maintenance personnel to overhaul.
Step 205, determining a corresponding carbon dioxide emission amount according to the emission volume concentration value, the flue gas data, the measurement time and the initial emission amount;
Further, step 205 comprises the sub-steps of:
s31, multiplying the discharge volume concentration value and a preset first characteristic parameter to generate a first multiplication value.
S32, multiplying the first multiplication value and a preset second characteristic parameter to generate a carbon dioxide mass concentration value.
S33, generating a corresponding carbon dioxide emission rate according to the carbon dioxide mass concentration value and the flue gas data.
Further, the flue gas data includes flue gas flow rate, flue sectional area, atmospheric pressure, flue gas static pressure, flue gas temperature and flue gas humidity, and S33 includes the following substeps:
s331, adding the flue gas temperature and a preset third characteristic parameter to generate a first sum;
S332, carrying out ratio processing on the third characteristic parameter and the first sum value to generate a first ratio value;
S333, adding the atmospheric pressure and the static pressure of the flue gas to generate a second sum value;
s334, carrying out ratio processing on the second sum value and a preset fourth characteristic parameter to generate a second ratio;
s335, carrying out difference processing on a preset fifth characteristic parameter and the flue gas humidity to generate a first difference value;
s336, multiplying the flue gas flow rate, the flue sectional area, the first ratio, the second ratio, the first difference value, the carbon dioxide mass concentration, the preset flow coefficient and the sixth characteristic parameter to generate the carbon dioxide emission rate.
S34, multiplying the carbon dioxide emission rate and the measurement time to generate a second multiplication value;
And S35, adding the initial emission amount and the second multiplication value to generate the carbon dioxide emission amount.
In the embodiment of the invention, in order to facilitate the implementation of the method, the above-mentioned processes of S31-S35 can be converted into a formula packaging form, and the expression of the carbon dioxide emission is as follows:
Bh＝Eh*th+B；
Eh＝cd×Qsn×10-6；
Wherein c s is the discharge volume concentration value, E h is the carbon dioxide discharge rate, t h is the measurement time, B is the initial discharge amount, B h is the carbon dioxide discharge amount, c d is the CO 2 dry basis mass concentration in the standard state, Q sn is the dry flue gas volume flow in the standard state, Q s is the wet flue gas volume flow in the actual working condition, t s is the flue gas temperature, p atm is the atmospheric pressure, p s is the static pressure of the flue gas, X sw is the moisture content of the flue gas, A is the flue sectional area, For determining the average flow velocity of the wet flue gas of the section, K v is the flow coefficient,/>Is the average flow rate of the flue gas.
And 206, taking the carbon dioxide emission amount as a new initial emission amount, and jumping to execute the step of collecting the flue gas data of the coal-fired power plant to be tested through the flue gas collecting device within the preset measurement time.
In the embodiment of the invention, the carbon dioxide emission is taken as a new initial emission, and the step of collecting the flue gas data of the coal-fired power plant to be measured through the flue gas collecting device in the preset measurement time is carried out in a jumping mode, so that the real-time measurement of the carbon dioxide emission of the coal-fired power plant to be measured is realized.
In the embodiment of the application, an initial emission amount corresponding to a carbon dioxide emission amount measurement request is determined in response to the carbon dioxide emission amount measurement request, flue gas data of a coal-fired power plant to be measured is acquired through a flue gas acquisition device within a preset measurement time, corresponding correction parameters are determined based on an oxygen concentration value, a load value and a preset correction key value pair library of the flue gas data, a corresponding emission volume concentration value is generated according to the carbon dioxide volume concentration and the correction parameters of the flue gas data, the corresponding carbon dioxide emission amount is determined according to the emission volume concentration value, the flue gas data, the measurement time and the initial emission amount, and the step of acquiring the flue gas data of the coal-fired power plant to be measured through the flue gas acquisition device is skipped to be executed in the preset measurement time. The technical problem that the current coal-fired power plant is difficult to provide real-time, accurate and reliable data support for power plant management staff due to the fact that fuel property detection is limited by test instruments and methods is solved. According to the application, the relation between the oxygen concentration value, the load value and the carbon dioxide volume concentration is utilized to analyze and correct the carbon dioxide volume concentration acquired by the flue gas acquisition device, so that a corrected emission volume concentration value is obtained, and the flue gas data, the initial emission amount and the measurement time are combined to calculate, so that the corresponding carbon dioxide emission amount is generated, and meanwhile, when the carbon dioxide volume concentration is abnormal, the flue gas acquisition device is adjusted, so that the accuracy of measuring the CO 2 emission amount is improved.
Referring to fig. 3, fig. 3 is a block diagram illustrating a system for measuring carbon dioxide emissions from a coal-fired power plant according to a third embodiment of the present invention.
The invention provides a carbon dioxide emission measurement system of a coal-fired power plant, which relates to a coal-fired power plant to be measured, wherein a flue gas acquisition device is arranged in a flue of the coal-fired power plant to be measured, and the system comprises:
The acquisition module 301 is configured to determine an initial emission amount corresponding to the carbon dioxide emission amount measurement request in response to the carbon dioxide emission amount measurement request, and acquire flue gas data of the coal-fired power plant to be measured through the flue gas acquisition device within a preset measurement time;
the correction module 302 is configured to determine a corresponding correction parameter based on an oxygen concentration value, a load value and a preset correction key value pair library of the flue gas data;
the volume concentration analysis module 303 is configured to generate a corresponding emission volume concentration value according to the carbon dioxide volume concentration and the correction parameter of the flue gas data;
The smoke analysis module 304 is configured to determine a corresponding carbon dioxide emission amount according to the emission volume concentration value, the smoke data, the measurement time and the initial emission amount;
And the skip module 305 is used for taking the carbon dioxide emission as a new initial emission, and skipping to execute the step of collecting the flue gas data of the coal-fired power plant to be tested through the flue gas collecting device within the preset measurement time.
Further, the correction module 302 includes:
the composite key sub-module is used for generating a corresponding composite key by adopting an oxygen concentration value and a load value of the flue gas data;
And the matching sub-module is used for matching corresponding correction parameters in the library according to the preset correction key value pair of the compound key.
Further, the correction parameters include a first correction parameter and a second correction parameter, and the volume concentration analysis module 303 includes:
the first analysis submodule is used for judging whether the carbon dioxide volume concentration of the flue gas data is larger than or equal to a first correction parameter;
If the carbon dioxide volume concentration is smaller than the first correction parameter, taking the first correction parameter as a discharge volume concentration value;
The second analysis submodule is used for judging that the volume concentration of the carbon dioxide is smaller than or equal to the second correction parameter if the volume concentration of the carbon dioxide is larger than or equal to the first correction parameter;
If the carbon dioxide volume concentration is greater than the second correction parameter, taking the second correction parameter as a discharge volume concentration value;
And if the carbon dioxide volume concentration is less than or equal to the second correction parameter, taking the carbon dioxide volume concentration as a discharge volume concentration value.
Further, the flue gas analysis module 304 includes:
The first processing submodule is used for multiplying the discharge volume concentration value and a preset first characteristic parameter to generate a first multiplied value;
The second processing submodule is used for multiplying the first multiplication value and a preset second characteristic parameter to generate a carbon dioxide mass concentration value;
the third processing submodule is used for generating a corresponding carbon dioxide emission rate according to the carbon dioxide mass concentration value and the flue gas data;
The fourth processing submodule is used for multiplying the carbon dioxide emission rate and the measurement time to generate a second multiplication value;
And the fifth processing submodule is used for adding and processing the initial emission quantity and the second multiplication value to generate the carbon dioxide emission quantity.
Further, the volumetric concentration analysis module 303 further includes:
The adjusting submodule is used for adjusting the probe position of the flue gas collecting device in a preset adjusting mode when the volume concentration of the carbon dioxide is smaller than the first correction parameter;
And the early warning sub-module is used for controlling the alarm of the smoke acquisition device to be started when the volume concentration of the carbon dioxide is larger than the second correction parameter.
Further, the flue gas data includes flue gas flow rate, flue cross-sectional area, atmospheric pressure, flue gas static pressure, flue gas temperature and flue gas humidity, and the third processing submodule includes:
The first processing unit is used for adding and processing the flue gas temperature and a preset third characteristic parameter to generate a first sum value;
the second processing unit is used for carrying out ratio processing on the third characteristic parameter and the first sum value to generate a first ratio value;
The third processing unit is used for adding the atmospheric pressure and the static pressure of the flue gas to generate a second sum value;
The fourth processing unit is used for carrying out ratio processing on the second sum value and a preset fourth characteristic parameter to generate a second ratio;
the fifth processing unit is used for performing difference processing on the preset fifth characteristic parameter and the flue gas humidity to generate a first difference value;
And the sixth processing unit is used for multiplying the flue gas flow rate, the flue sectional area, the first ratio, the second ratio, the first difference value, the carbon dioxide mass concentration, the preset flow coefficient and the sixth characteristic parameter to generate the carbon dioxide emission rate.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.
In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The method is characterized by comprising the following steps of:
Responding to a carbon dioxide emission amount measurement request, determining an initial emission amount corresponding to the carbon dioxide emission amount measurement request, and collecting flue gas data of the coal-fired power plant to be tested through the flue gas collecting device within a preset measurement time;
determining corresponding correction parameters based on an oxygen concentration value, a load value and a preset correction key value pair library of the flue gas data;
Generating a corresponding emission volume concentration value according to the carbon dioxide volume concentration of the flue gas data and the correction parameter;
Determining a corresponding carbon dioxide emission amount according to the emission volume concentration value, the flue gas data, the measurement time and the initial emission amount;
and taking the carbon dioxide emission as a new initial emission, and jumping to execute the step of collecting the flue gas data of the coal-fired power plant to be tested through the flue gas collecting device within the preset measurement time.
2. The method for measuring carbon dioxide emissions from a coal-fired power plant according to claim 1, wherein the step of determining the corresponding correction parameters based on the oxygen concentration value, the load value, and the preset correction key value pair library of the flue gas data comprises:
Generating a corresponding compound key by adopting an oxygen concentration value and a load value of the flue gas data;
and matching corresponding correction parameters in a preset correction key value pair library according to the composite key.
3. The method for measuring carbon dioxide emissions from a coal-fired power plant according to claim 1, wherein the correction parameters include a first correction parameter and a second correction parameter, and the step of determining the corresponding emission volume concentration value based on the carbon dioxide volume concentration of the flue gas data and the correction parameters includes:
judging whether the carbon dioxide volume concentration of the flue gas data is larger than or equal to the first correction parameter;
If the carbon dioxide volume concentration is smaller than the first correction parameter, taking the first correction parameter as a discharge volume concentration value;
if the carbon dioxide volume concentration is greater than or equal to the first correction parameter, judging that the carbon dioxide volume concentration is less than or equal to the second correction parameter;
if the carbon dioxide volume concentration is larger than the second correction parameter, taking the second correction parameter as a discharge volume concentration value;
And if the carbon dioxide volume concentration is smaller than or equal to the second correction parameter, taking the carbon dioxide volume concentration as a discharge volume concentration value.
4. The method for measuring carbon dioxide emissions from a coal-fired power plant according to claim 3, further comprising:
When the volume concentration of the carbon dioxide is smaller than the first correction parameter, adjusting the probe position of the flue gas collection device in a preset adjusting mode;
and when the volume concentration of the carbon dioxide is larger than the second correction parameter, controlling an alarm of the flue gas collection device to be started.
5. The method for measuring carbon dioxide emissions from a coal-fired power plant according to claim 1, wherein the step of generating a corresponding carbon dioxide emission from the emission volume concentration value, the flue gas data, the measurement time, and the initial emission comprises:
Multiplying the discharge volume concentration value and a preset first characteristic parameter to generate a first multiplied value;
multiplying the first multiplication value and a preset second characteristic parameter to generate a carbon dioxide mass concentration value;
Generating a corresponding carbon dioxide emission rate according to the carbon dioxide mass concentration value and the flue gas data;
multiplying the carbon dioxide emission rate and the measurement time to generate a second multiplied value;
and adding the initial emission amount and the second multiplication value to generate carbon dioxide emission amount.
6. The method of claim 5, wherein the flue gas data includes flue gas flow rate, flue sectional area, atmospheric pressure, flue gas static pressure, flue gas temperature, and flue gas humidity, and the step of generating a corresponding carbon dioxide emission rate according to the carbon dioxide mass concentration value and the flue gas data comprises:
adding the flue gas temperature and a preset third characteristic parameter to generate a first sum;
performing ratio processing on the third characteristic parameter and the first sum value to generate a first ratio value;
adding the atmospheric pressure and the static pressure of the flue gas to generate a second sum value;
performing ratio processing on the second sum and a preset fourth characteristic parameter to generate a second ratio;
performing difference processing on a preset fifth characteristic parameter and the flue gas humidity to generate a first difference;
And multiplying the flue gas flow rate, the flue sectional area, the first ratio, the second ratio, the first difference value, the carbon dioxide mass concentration, a preset flow coefficient and a sixth characteristic parameter to generate a carbon dioxide emission rate.
7. The utility model provides a coal-fired power plant carbon dioxide emission quantity measurement system which characterized in that relates to the coal-fired power plant that awaits measuring, be equipped with flue gas collection system in the flue of coal-fired power plant that awaits measuring, include:
The acquisition module is used for responding to the carbon dioxide emission measurement request, determining the initial emission corresponding to the carbon dioxide emission measurement request and acquiring the flue gas data of the coal-fired power plant to be measured through the flue gas acquisition device within the preset measurement time;
The correction module is used for determining corresponding correction parameters based on the oxygen concentration value, the load value and a preset correction key value pair library of the flue gas data;
the volume concentration analysis module is used for generating a corresponding emission volume concentration value according to the carbon dioxide volume concentration of the flue gas data and the correction parameter;
The flue gas analysis module is used for determining the corresponding carbon dioxide emission according to the emission volume concentration value, the flue gas data, the measurement time and the initial emission;
And the jump module is used for taking the carbon dioxide emission as a new initial emission, and jumping to execute the step of collecting the flue gas data of the coal-fired power plant to be tested through the flue gas collecting device within the preset measurement time.
8. The coal-fired power plant carbon dioxide emission measurement system according to claim 7, wherein the correction module comprises:
the composite key sub-module is used for generating a corresponding composite key by adopting the oxygen concentration value and the load value of the flue gas data;
and the matching sub-module is used for matching corresponding correction parameters in a preset correction key value pair library according to the composite key.
9. The coal-fired power plant carbon dioxide emission measurement system of claim 7, wherein the correction parameters include a first correction parameter and a second correction parameter, the volumetric concentration analysis module comprising:
The first analysis submodule is used for judging whether the carbon dioxide volume concentration of the flue gas data is larger than or equal to the first correction parameter;
If the carbon dioxide volume concentration is smaller than the first correction parameter, taking the first correction parameter as a discharge volume concentration value;
The second analysis submodule is used for judging that the volume concentration of the carbon dioxide is smaller than or equal to the second correction parameter if the volume concentration of the carbon dioxide is larger than or equal to the first correction parameter;
if the carbon dioxide volume concentration is larger than the second correction parameter, taking the second correction parameter as a discharge volume concentration value;
And if the carbon dioxide volume concentration is smaller than or equal to the second correction parameter, taking the carbon dioxide volume concentration as a discharge volume concentration value.
10. The coal-fired power plant carbon dioxide emission measurement system of claim 7, wherein the flue gas analysis module comprises:
The first processing submodule is used for multiplying the discharge volume concentration value and a preset first characteristic parameter to generate a first multiplied value;
the second processing submodule is used for multiplying the first multiplication value and a preset second characteristic parameter to generate a carbon dioxide mass concentration value;
the third processing submodule is used for generating a corresponding carbon dioxide emission rate according to the carbon dioxide mass concentration value and the flue gas data;
a fourth processing sub-module, configured to multiply the carbon dioxide emission rate and the measurement time to generate a second multiplied value;
and a fifth processing sub-module, configured to perform addition processing on the initial emission amount and the second multiplier, and generate a carbon dioxide emission amount.
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