CN113804819A - Thermal power plant carbon emission full-process monitoring system and monitoring method - Google Patents
Thermal power plant carbon emission full-process monitoring system and monitoring method Download PDFInfo
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Abstract
The invention discloses a whole carbon emission process monitoring system and a monitoring method for a thermal power plant. According to the method, the carbon emission amount is respectively counted from three aspects of furnace entering fuel, ash and slag discharging after the fuel is fully combusted and smoke discharging after the fuel is fully combusted, accurate carbon emission data in the thermal power generation process is finally obtained, the full-flow, multi-channel counting and accurate counting of the carbon emission data of the thermal power plant are realized, the carbon emission home base of the thermal power plant is known, and the implementation of the carbon peak-reaching target is guaranteed.
Description
Technical Field
The invention relates to the technical field of carbon emission monitoring in the thermal power generation industry, in particular to a thermal power plant carbon emission full-process monitoring system and a thermal power plant carbon emission full-process monitoring method.
Background
With the carbon dioxide emission reaching a peak value before 2030 years and the proposal of achieving the carbon neutralization goal before 2060 years, the power industry is taken as the first industry to be brought into the carbon trading market, and accurate carbon emission monitoring means are necessary to effectively implement the carbon management policy.
The existing carbon emission monitoring method of the thermal power plant calculates the carbon emission according to the coal-fired quantity and directly detects the carbon dioxide emission in the flue gas, various detection methods are independently used, and the accuracy of the detection result cannot be determined.
The existing method for accounting the carbon emission according to the coal combustion amount does not subdivide fuel, particularly under the large trend of wide biomass mixed combustion, subdivision and proportion relation determination of the fuel are particularly important for accurately accounting the carbon emission, and irregular detection easily causes the deviation of a detection result from a true value.
Disclosure of Invention
In order to overcome the problems in the prior art, the invention aims to provide a system and a method for monitoring the whole carbon emission process of a thermal power plant, so that the accurate monitoring of the carbon emission content of the thermal power plant is realized, and the smooth implementation of carbon peak reaching and carbon neutralization targets is guaranteed.
In order to achieve the purpose, the invention adopts the following technical scheme:
a thermal power plant carbon emission full-process monitoring system comprises a fuel carbon emission monitoring system, an ash carbon emission monitoring system, a smoke carbon emission monitoring system and a carbon emission comprehensive monitoring device 3;
the fuel carbon emission monitoring system comprises a fuel metering scale 2 which is connected with a fuel conveyer belt 1 and is provided with a data remote transmission module, and the weighed fuel enters a boiler 4 for combustion;
the ash carbon emission monitoring system comprises a slag discharge metering scale 12 which is connected with a dry-type slag conveyor 5 at the bottom of the boiler 4 and is provided with a data remote transmission module, and the weighted slag is discharged to a slag bin 13; the system also comprises an ash discharge metering scale 7 which is connected with the bottom of the dust remover 6 and is provided with a data remote transmission module, and the weighed furnace ash enters a pneumatic ash conveying system 8 to be conveyed away;
the smoke carbon emission monitoring system comprises a gas flowmeter 10 and a carbon dioxide concentration detector 11 which are arranged on an outlet pipeline of the induced draft fan 9 behind the dust remover 6;
and the data remote transmission module on the fuel metering scale 2, the data remote transmission module on the slag discharge metering scale 12, the data remote transmission module on the ash discharge metering scale 7, the gas flowmeter 10 and the carbon dioxide concentration detector 11 are all connected to the carbon emission comprehensive monitoring equipment 3, and the measurement results are transmitted to the carbon emission comprehensive monitoring equipment 3.
The fuel conveyed by the fuel conveying belt 1 is coal of different types and biomass, and the proportion of different fuels is fixed during monitoring.
The fuel metering scale 2 in the fuel carbon emission monitoring system is a belt scale or a chain plate scale, and can remotely transmit a weighing result to the carbon emission comprehensive monitoring equipment 3.
The slag discharge metering scale 12 in the ash carbon emission monitoring system is a belt scale or a chain plate scale, and can remotely transmit the weighing result to the carbon emission comprehensive monitoring equipment 3.
The ash discharging metering scale 7 in the ash carbon discharging monitoring system is a spiral scale and is connected with the dust remover 6 and the pneumatic ash conveying system 8 through flanges, so that the whole weighing process has no furnace ash leakage, and the weighing result can be transmitted to the carbon discharging comprehensive monitoring equipment 3.
The gas flowmeter 10 in the exhaust carbon emission monitoring system is a vortex shedding flowmeter or a differential pressure flowmeter and other gas detection flowmeters, and the data of the gas flowmeter 10 and the carbon dioxide concentration detector 11 can be remotely transmitted to the carbon emission comprehensive monitoring equipment 3.
The carbon emission comprehensive monitoring device 3 receives data signals from a fuel carbon emission monitoring system, an ash carbon emission monitoring system and a smoke carbon emission monitoring system, and converts various data into a fuel carbon emission accounting result, an ash carbon emission accounting result and a smoke carbon emission accounting result.
The monitoring method of the thermal power plant carbon emission full-flow monitoring system is used for carrying out chemical analysis on various coals and biomasses contained in boiler fuel before test, and the main indexes are ash content A and dry base carbon content CdDry base carbon content CdCorresponding CO2Discharge amount of 44/12CdInputting the analysis result into the carbon emission comprehensive monitoring equipment 3;
the integrated carbon emission monitoring device 3 can automatically calculate the ash content A generated after each 1 kg of fuel is combusted according to the blending combustion ratio (a%, b% and c% … …) of various coals and biomassesTAnd the amount of carbon dioxide CO2T，AT＝a％×A1+b％×A2+c％×A3……，CO2T＝44/12×(a％×Cd1+b％×Cd2+c％×Cd3……)；
The blending combustion proportion of various fuels is input into the carbon emission comprehensive monitoring equipment 3, and the fuel consumed in the unit time counted by the fuel metering scale 2 is m1Kilogram, the data is transmitted to the carbon emission comprehensive monitoring equipment 3 and is subjected to accounting, and the carbon dioxide emission CO is calculated by fuel combustion2F＝m1×CO2T；
The blending combustion proportion of various fuels is input into the carbon emission comprehensive monitoring equipment 3, and the slag discharge metering scale 12 and the ash discharge metering scale 7 count that the slag discharge is m in unit time2Kilogram and ash discharge are m3Kilogram, total ash quantity m4＝m2+m3Transmitting the data to the carbon emission comprehensive monitoring equipment 3 and carrying out accounting, and calculating the carbon dioxide emission CO from the ash core generated after the fuel is combusted2A＝m4÷AT×CO2T；
Because the load of the thermal power generating unit is fluctuant and the exhaust flow is also changed, the statistics should be carried out in a segmented manner, and the time is not suitable to be too long; the gas flowmeter 10 counts the average value V of the exhaust air flow every 10min, and the exhaust air flow counted in a period of time is V1,V2……VnThe carbon dioxide concentration detector 11 counts the average carbon dioxide concentration C every 10min, and the carbon dioxide concentrations counted in a period of time are respectively C1,C2……CnThen the carbon dioxide emission amount calculated by the carbon dioxide detection core in the exhaust smoke in unit time
Calculating carbon dioxide emission CO for fuel combustion nucleus2FAfter combustion of the fuelCalculating carbon dioxide emission CO by using generated ash core2AAnd carbon dioxide emission CO calculated by carbon dioxide detection and verification in smoke discharge2GAnd (4) calculating an average value, calculating the deviation of each calculation value as | calculation value-average value |/average value, checking the corresponding system for the calculation value with the deviation of more than or equal to 10%, and taking the average value of the calculation values with the deviation within a normal range as a final carbon emission index.
Compared with the prior art, the invention has the following advantages:
1. the method is characterized in that the whole flow of fuel combustion of the thermal power plant is monitored, and the carbon dioxide emission is monitored from the three aspects of the fuel charging amount, the ash amount generated after the fuel is combusted and the carbon dioxide amount generated after the fuel is combusted.
2. The method has the advantages that the furnace entering fuel is subdivided, the dry base carbon content and ash content of various fuels are quantitatively analyzed before carbon emission monitoring is carried out, and the accuracy of carbon dioxide monitoring data is guaranteed.
3. The carbon dioxide emission of monitoring in three aspects of fuel, lime-ash, discharging fume is compared, can find out the monitoring system who has a problem and in time investigate it, further ensures the accuracy of carbon dioxide monitoring data.
Drawings
FIG. 1 is a schematic diagram of a thermal power plant carbon emission overall process monitoring system according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the system for monitoring the whole carbon emission process of the thermal power plant comprises a fuel carbon emission monitoring system, an ash carbon emission monitoring system, a smoke carbon emission monitoring system and a carbon emission comprehensive monitoring device 3; the fuel carbon emission monitoring system comprises a fuel metering scale 2 which is connected with a fuel conveyer belt 1 and is provided with a data remote transmission module, and the weighed fuel enters a boiler 4 for combustion; the ash carbon emission monitoring system comprises a slag discharge metering scale 12 which is connected with a dry-type slag conveyor 5 at the bottom of the boiler 4 and is provided with a data remote transmission module, and the weighted slag is discharged to a slag bin 13; the system also comprises an ash discharge metering scale 7 which is connected with the bottom of the dust remover 6 and is provided with a data remote transmission module, and the weighed furnace ash enters a pneumatic ash conveying system 8 to be conveyed away; the smoke carbon emission monitoring system comprises a gas flowmeter 10 and a carbon dioxide concentration detector 11 which are arranged on an outlet pipeline of the induced draft fan 9 behind the dust remover 6; and the data remote transmission module on the fuel metering scale 2, the data remote transmission module on the slag discharge metering scale 12, the data remote transmission module on the ash discharge metering scale 7, the gas flowmeter 10 and the carbon dioxide concentration detector 11 are all connected to the carbon emission comprehensive monitoring equipment 3, and the measurement results are transmitted to the carbon emission comprehensive monitoring equipment 3.
The invention discloses a monitoring method of a thermal power plant carbon emission full-flow monitoring system, which takes a biomass-doped power plant as an example, fuel is lignite and straw which respectively account for 85 percent and 15 percent, the lignite and straw used by a unit are tested and analyzed before the unit is started, and the ash content of each 1 kilogram of lignite is A1A dry basis carbon content of Cd1The ash content of each 1 kg of straw is A2A dry basis carbon content of Cd2。
Basic information of combustion of each fuel and the co-combustion ratio of each fuel are input into the integrated carbon emission monitoring equipment 3, and the integrated carbon emission monitoring equipment automatically gives the ash content A generated by combustion of each 1 kg of mixed fuelT＝85％×A1+15％×A2Carbon dioxide amount CO produced by burning 1 kg of mixed fuel2T＝44/12×(85％×Cd1+15％×Cd2)。
The fuel consumed by the fuel metering scale 2 is counted as m every 8h1Kilogram, the data is transmitted to the carbon emission comprehensive monitoring equipment 3 and is subjected to accounting, and the carbon dioxide emission CO is calculated by fuel combustion2F＝m1×CO2T；
The slag discharge metering scale 12 and the ash discharge metering scale 7 discharge slag m every 8h2Kilogram and ash discharge are m3Kilogram, total ash quantity m4＝m2+m3Transmitting the data to the carbon emission comprehensive monitoring equipment 3 and carrying out accounting, and calculating the carbon dioxide emission CO from the ash core generated after the fuel is combusted2A＝m4÷AT×CO2T；
The gas flowmeter 10 counts the average value V of the exhaust flow every 10min, and the exhaust flow counted in 8h is V respectively1,V2……V48The carbon dioxide concentration detector 11 counts the average carbon dioxide concentration C every 10min, and the carbon dioxide concentrations counted in a period of time are respectively C1,C2……CnThen the carbon dioxide emission calculated by the carbon dioxide detection core in the smoke discharge within 8h
Calculating carbon dioxide emission CO for fuel combustion nucleus2FCalculating carbon dioxide emission CO by using ash core generated after fuel combustion2AAnd carbon dioxide emission CO calculated by carbon dioxide detection and verification in smoke discharge2GAnd (4) calculating an average value, calculating the deviation of each calculation value as | calculation value-average value |/average value, checking the corresponding system for the calculation value with the deviation of more than or equal to 10%, and taking the average value of the calculation values with the deviation within a normal range as a final carbon emission index.
Claims (7)
1. The utility model provides a thermal power plant carbon emission full-process monitoring system which characterized in that: comprises a fuel carbon emission monitoring system, an ash carbon emission monitoring system, a smoke carbon emission monitoring system and a carbon emission comprehensive monitoring device (3);
the fuel carbon emission monitoring system comprises a fuel metering scale (2) which is connected with a fuel conveying belt (1) and is provided with a data remote transmission module, and fuel with weighed weight enters a boiler (4) for combustion;
the ash carbon emission monitoring system comprises a slag discharge metering scale (12) which is connected with a dry type slag dragging machine (5) at the bottom of the boiler (4) and is provided with a data remote transmission module, and the slag which is weighed is discharged to a slag bin (13); the system also comprises an ash discharge metering scale (7) which is connected with the bottom of a dust remover (6) at the tail part of the boiler (4) and is provided with a data remote transmission module, and the weighed boiler ash enters a pneumatic ash conveying system (8) to be conveyed away;
the system for monitoring carbon emission in flue gas comprises a gas flowmeter (10) and a carbon dioxide concentration detector (11), wherein the gas flowmeter (10) and the carbon dioxide concentration detector are installed on an outlet pipeline of a draught fan (9) behind a dust remover (6);
and the data remote transmission module on the fuel metering scale (2), the data remote transmission module on the slag discharge metering scale (12), the data remote transmission module on the ash discharge metering scale (7), the gas flowmeter (10) and the carbon dioxide concentration detector (11) are all connected to the carbon emission comprehensive monitoring equipment (3), and the measurement result is transmitted to the carbon emission comprehensive monitoring equipment (3).
2. The system for monitoring the whole carbon emission process of the thermal power plant according to claim 1, wherein: the fuel conveyed by the fuel conveying belt (1) is different kinds of coal and biomass, and the proportion of different fuels is fixed during monitoring.
3. The thermal power plant carbon emission monitoring system of claim 1, wherein: the fuel metering scale (2) in the fuel carbon emission monitoring system is a belt scale or a chain plate scale, and the weighing result is remotely transmitted to the carbon emission comprehensive monitoring equipment (3).
4. The system for monitoring the whole carbon emission process of the thermal power plant according to claim 1, wherein: the slag discharge metering scale (12) in the ash carbon emission monitoring system is a belt scale or a chain plate scale, and the weighing result is remotely transmitted to the carbon emission comprehensive monitoring equipment (3).
5. The system for monitoring the whole carbon emission process of the thermal power plant according to claim 1, wherein: the ash discharging metering scale (7) in the ash carbon emission monitoring system is a spiral scale and is connected with the dust remover (6) and the pneumatic ash conveying system (8) through flanges, so that the whole weighing process has no furnace ash leakage, and the weighing result is transmitted to the carbon emission comprehensive monitoring equipment (3) remotely.
6. The thermal power plant carbon emission full-flow monitoring system according to claim 1. The method is characterized in that: the gas flowmeter (10) in the smoke discharging carbon emission monitoring system is a vortex shedding flowmeter or a differential pressure flowmeter, and data of the gas flowmeter (10) and the carbon dioxide concentration detector (11) are remotely transmitted to the carbon emission comprehensive monitoring equipment (3).
7. The monitoring method of the thermal power plant carbon emission full-flow monitoring system according to any one of claims 1 to 6, characterized in that: before test, various coals and biomasses contained in the boiler fuel are tested and analyzed, and the main indexes are ash content A and dry base carbon content CdDry base carbon content CdCorresponding CO2Discharge amount of 44/12CdInputting the analysis result into the carbon emission comprehensive monitoring equipment (3);
the integrated carbon emission monitoring equipment (3) calculates the ash content A generated after each 1 kg of fuel is burnt according to the proportion a%, b% and c% … … of various coal and biomass co-combustionTAnd the amount of carbon dioxide CO2T，AT＝a％×A1+b％×A2+c％×A3……，CO2T＝44/12×(a％×Cd1+b％×Cd2+c％×Cd3……)；
The blending combustion proportion of various fuels is input into the carbon emission comprehensive monitoring equipment (3), and the fuel consumed in unit time is counted by the fuel metering scale (2) to be m1Kilogram, the data is transmitted to the carbon emission comprehensive monitoring equipment (3) and is subjected to accounting, and the carbon dioxide emission CO is calculated by fuel combustion2F＝m1×CO2T；
The blending combustion proportion of various fuels is input into the carbon emission comprehensive monitoring equipment (3), and the slag discharge metering scale (12) and the ash discharge metering scale (7) count that the slag discharge is m in unit time2Kilogram and ash discharge are m3Kilogram, total ash quantity m4＝m2+m3The data are transmitted to a carbon emission comprehensive monitoring device (3) and are subjected to accounting, and carbon dioxide emission CO is calculated by the nuclear of ash slag generated after fuel combustion2A＝m4÷AT×CO2T；
Because the load of the thermal power generating unit is fluctuant and the exhaust flow is also changed, the statistics should be carried out in sections, the average value V of the exhaust flow is counted by the gas flowmeter (10) every 10min, and the exhaust flow counted in a period of time is respectively V1,V2……VnThe carbon dioxide concentration detector (11) counts the average value C of the carbon dioxide concentration every 10min, and the carbon dioxide concentrations counted in a period of time are respectively C1,C2……CnThen the carbon dioxide emission amount calculated by the carbon dioxide detection core in the exhaust smoke in unit time
Calculating carbon dioxide emission CO for fuel combustion nucleus2FCalculating carbon dioxide emission CO by using ash core generated after fuel combustion2AAnd carbon dioxide emission CO calculated by carbon dioxide detection and verification in smoke discharge2GAnd (4) calculating an average value, calculating the deviation of each calculation value as | calculation value-average value |/average value, checking the corresponding system for the calculation value with the deviation of more than or equal to 10%, and taking the average value of the calculation values with the deviation within a normal range as a final carbon emission index.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114037585A (en) * | 2022-01-07 | 2022-02-11 | 阿里云计算有限公司 | Carbon data processing method, carbon data interaction method, carbon data presentation method, electronic device, and storage medium |
| CN116809236A (en) * | 2023-05-23 | 2023-09-29 | 国能南京电力试验研究有限公司 | Safe operation judging method, device and system of electric dust collector and boiler system |
| CN116858308A (en) * | 2023-06-30 | 2023-10-10 | 潍坊市特种设备检验研究院 | Energy-saving and environment-friendly detection system for boiler, boiler system and detection method |
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2021
- 2021-10-21 CN CN202111226113.XA patent/CN113804819A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114037585A (en) * | 2022-01-07 | 2022-02-11 | 阿里云计算有限公司 | Carbon data processing method, carbon data interaction method, carbon data presentation method, electronic device, and storage medium |
| CN116809236A (en) * | 2023-05-23 | 2023-09-29 | 国能南京电力试验研究有限公司 | Safe operation judging method, device and system of electric dust collector and boiler system |
| CN116858308A (en) * | 2023-06-30 | 2023-10-10 | 潍坊市特种设备检验研究院 | Energy-saving and environment-friendly detection system for boiler, boiler system and detection method |
| CN116858308B (en) * | 2023-06-30 | 2024-02-20 | 潍坊市特种设备检验研究院 | Energy-saving and environment-friendly detection system for boiler, boiler system and detection method |
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