Biomass gasification coupling unit CO2 on-line monitoring and metering system and method

Abstract

The application relates to the field of carbon emission metering, and discloses a biomass gasification coupling unit CO2 online monitoring metering system and method, which comprises the following modules: a flue gas CO2 monitoring module for monitoring flue gas CO2 concentration and flue gas flow; a biomass gasification fuel gas monitoring module for monitoring biomass gasification fuel gas components and biomass gasification fuel gas flow; a data acquisition and transmission module for acquiring monitoring data and transmitting the monitoring data and production operation data to a computer processing and statistical module; and the computer processing and statistical module for processing and operating the received data to obtain CO2 emission amounts respectively facing enterprise boundaries and implementation boundaries and displaying the CO2 emission amounts in the form of reports. Thus, through continuous online monitoring of key carbon emission parameters in each link, automatic metering of carbon emission is realized, daily management workload is small, the monitoring process is less affected by the complexity of unit fuel, and the timeliness and accuracy of carbon emission accounting data are greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of carbon emission measurement, in particular to a biomass gasification coupled unit CO2 online monitoring and measurement system and method. BACKGROUND

[0002] As the first key industry included in the national carbon market, the power generation industry ensures the accuracy and reliability of carbon emission data, which is the basic guarantee for the effective and standardized operation of the national carbon market. The calculation of carbon emissions in China generally uses the accounting method, which calculates the carbon emissions by calculating the consumption of fossil fuels according to certain emission factor coefficients. For the complex coal quality and large load variation of coal-fired power generation in China, there are defects such as lack of scientificity, high management cost, and large human interference factors.

[0003] For thermal power enterprises, the accounting boundary includes enterprise boundary and compliance boundary. The enterprise boundary is the boundary of the enterprise legal person, which refers to identifying, accounting and reporting the greenhouse gas emissions generated by all production systems and facilities within the enterprise boundary, including carbon dioxide emissions from fossil fuel combustion, desulfurization process and purchased power. The compliance boundary is the boundary of the unit facility, which identifies, accounts and reports the greenhouse gas emissions generated by all unit facilities within the facility boundary, including carbon dioxide emissions from fossil fuel combustion and purchased power, but excluding desulfurization emissions. However, whether it is the enterprise boundary or the compliance boundary, biomass mixed fuel combustion power generation and waste incineration power generation, the current measurement method only counts the carbon dioxide emissions of fossil fuels (such as coal) used in power generation.

[0004] Therefore, for biomass gasification coupled units, how to realize real-time carbon dioxide online measurement method for enterprise boundary and compliance boundary is a technical problem to be solved by those skilled in the art. SUMMARY

[0005] Therefore, the purpose of the present application is to provide a biomass gasification coupled unit CO2 online monitoring and measurement system and method, which can realize automatic measurement of carbon emissions and improve the timeliness and accuracy of carbon emission accounting data. The specific scheme is as follows:

[0006] A biomass gasification coupled unit CO2 online monitoring and measurement system, comprising: a flue gas CO2 monitoring module, a biomass gasification fuel gas monitoring module, a data acquisition and transmission module connected with the flue gas CO2 monitoring module and the biomass gasification fuel gas monitoring module respectively, and a computer processing and statistical module connected with the data acquisition and transmission module; wherein,

[0007] The flue gas CO2 monitoring module is used for monitoring the flue gas CO2 concentration and the flue gas flow;

[0008] The biomass gasification fuel gas monitoring module is used for monitoring biomass gasification fuel gas components and biomass gasification fuel gas flow;

[0009] The data acquisition and transmission module is used for acquiring monitoring data of the flue gas CO2 monitoring module and the biomass gasification fuel gas monitoring module, and transmitting the monitoring data and production operation data to the computer processing and statistical module;

[0010] The computer processing and statistical module is used for processing and operating the received data, respectively obtaining CO2 emissions facing enterprise boundaries and compliance boundaries, and displaying in the form of a report.

[0011] Preferably, in the above biomass gasification coupled unit CO2 online monitoring and metering system provided by the embodiment of the present application, the flue gas CO2 monitoring module comprises a flue gas CO2 concentration monitoring instrument and a flue gas flow monitoring instrument; the flue gas CO2 concentration monitoring instrument and the flue gas flow monitoring instrument are both installed at a flue gas outlet of a chimney of a thermal power unit;

[0012] The biomass gasification fuel gas monitoring module comprises a biomass gasification fuel gas component monitoring instrument and a biomass gasification fuel gas flow monitoring instrument.

[0013] Preferably, in the above biomass gasification coupled unit CO2 online monitoring and metering system provided by the embodiment of the present application, the data acquisition and transmission module comprises a data acquisition unit and a data transmission unit;

[0014] The data acquisition unit comprises a first data acquisition subunit connected with the flue gas CO2 monitoring module, and a second data acquisition subunit connected with the biomass gasification fuel gas monitoring module;

[0015] The data transmission unit comprises an industrial computer transmission subunit connected with the first data acquisition subunit, and a DCS transmission subunit connected with the second data acquisition subunit; wherein,

[0016] The industrial computer transmission subunit is used for transmitting flue gas CO2 monitoring data acquired by the first data acquisition subunit to the computer processing and statistical module through a data terminal deployed on an industrial computer of a clean flue gas environmental protection house;

[0017] The DCS transmission subunit is used for transmitting biomass gasification monitoring data acquired by the second data acquisition subunit to a desulfurization DCS through a data transmission cable, and transmitting the biomass gasification monitoring data, production operation data to the computer processing and statistical module through a backup cable between the clean flue gas environmental protection house and the desulfurization DCS.

[0018] Preferably, in the biomass gasification coupled unit CO2 online monitoring and metering system provided by the embodiment of the present application, the computer processing and statistical module comprises an online calculation processing unit and a statistical report unit.

[0019] The online calculation processing unit is configured to calculate the total CO2 emission in the flue gas, the CO2 emission of the biomass gasification part, the CO2 emission generated in the limestone-gypsum desulfurization link, and the emission generated by the purchased power; subtract the CO2 emission of the biomass gasification part from the total CO2 emission in the flue gas, and add the emission generated by the purchased power to obtain the CO2 emission facing the enterprise boundary; subtract the CO2 emission of the biomass gasification part and the CO2 emission of the limestone-gypsum desulfurization link from the total CO2 emission in the flue gas in sequence, and add the emission generated by the purchased power to obtain the CO2 emission facing the compliance boundary.

[0020] The statistical report unit is configured to statistically and display the data of the online calculation processing unit in the form of daily report, monthly report and annual report.

[0021] Preferably, in the biomass gasification coupled unit CO2 online monitoring and metering system provided by the embodiment of the present application, the online calculation processing unit is specifically configured to calculate the total CO2 emission in the flue gas by using a first formula; the first formula is as follows:

[0022]

[0023] wherein, E CO2，烟气 is the total CO2 emission in the flue gas; is the dry flue gas flow under actual working conditions; C CO2 is the dry basis volume concentration of CO2 in the flue gas.

[0024] Preferably, in the biomass gasification coupled unit CO2 online monitoring and metering system provided by the embodiment of the present application, the online calculation processing unit is specifically configured to calculate the CO2 emission of the biomass gasification part by using a second formula; the second formula is as follows:

[0025]

[0026] wherein, E CO2,生物质 is the CO2 emission of the biomass gasification part; is the dry gas flow of the biomass gasification; X j is the volume concentration of component j in the dry gas; j is one of CO, CO2, CH4, C2H y , C3H8, and C2Hy is the sum of C2H2, C2H4 and C2H6.

[0027] Preferably, in the above-mentioned biomass gasification coupled unit CO2 online monitoring and metering system provided by the embodiment of the present application, the online calculation processing unit is specifically used for calculating the CO2 emission amount generated in the limestone-gypsum desulfurization link by using a third formula; the third formula is as follows:

[0028]

[0029] E = (E1 + E2) - (E3 + E4) wherein E is the CO2 emission amount generated in the limestone-gypsum desulfurization link; CO2，脱硫 E1 is the SO2 mass concentration at the inlet of the desulfurization tower; E2 is the SO2 mass concentration at the outlet of the desulfurization tower. E3 is the SO2 mass concentration at the inlet of the limestone-gypsum desulfurization tower;

[0030] Preferably, in the above-mentioned biomass gasification coupled unit CO2 online monitoring and metering system provided by the embodiment of the present application, the online calculation processing unit is specifically used for calculating the CO2 emission amount generated in the limestone-gypsum desulfurization link by using a third formula; the third formula is as follows:

[0031] E = (E1 + E2) - (E3 + E4) wherein E is the CO2 emission amount generated in the limestone-gypsum desulfurization link; CO2，外购电 P is the power of the purchased and used electricity; 电 EF is the power grid emission factor. 电

[0032] E = (E1 + E2) - (E3 + E4) wherein E is the CO2 emission amount generated in the limestone-gypsum desulfurization link; CO2，外购电 P is the power of the purchased and used electricity; 电 EF is the power grid emission factor. 电

[0033] The embodiment of the present application also provides a metering method of the above-mentioned biomass gasification coupled unit CO2 online monitoring and metering system provided by the embodiment of the present application, which comprises the following steps:

[0034] The flue gas CO2 monitoring module monitors the flue gas CO2 concentration and the flue gas flow;

[0035] The biomass gasification fuel gas monitoring module monitors the biomass gasification fuel gas component and the biomass gasification fuel gas flow;

[0036] The data acquisition and transmission module acquires the monitoring data of the flue gas CO2 monitoring module and the biomass gasification fuel gas monitoring module, and transmits the monitoring data and the production operation data to the computer processing and statistical module;

[0037] The computer processing and statistical module processes and calculates the received data, respectively obtains the CO2 emission amounts facing the enterprise boundary and the compliance boundary, and displays in the form of a report.

[0038] ​Preferably, in the metering method of the above biomass gasification coupled unit CO2 online monitoring metering system provided by the embodiment of the application, the computer processing and statistical module processes the received data to obtain CO2 emissions facing the enterprise boundary and the performance boundary respectively, and displays in the form of a report, including:

[0039] The online calculation processing unit calculates the total amount of CO2 emissions in the flue gas, the CO2 emissions of the biomass gasification part, the CO2 emissions generated in the limestone-gypsum desulfurization link, and the emissions generated by the purchased and used power; the total amount of CO2 emissions in the flue gas is subtracted by the CO2 emissions of the biomass gasification part, and the emissions generated by the purchased and used power is added to obtain the CO2 emissions facing the enterprise boundary; the total amount of CO2 emissions in the flue gas is subtracted by the CO2 emissions of the biomass gasification part and the CO2 emissions of the limestone-gypsum desulfurization link in turn, and the emissions generated by the purchased and used power is added to obtain the CO2 emissions facing the performance boundary;

[0040] The statistical report unit statistically processes and displays the data of the online calculation processing unit in the form of daily reports, monthly reports and annual reports.

[0041] As can be seen from the above technical solution, the biomass gasification coupled unit CO2 online monitoring metering system provided by the application comprises: a flue gas CO2 monitoring module, a biomass gasification fuel gas monitoring module, a data acquisition and transmission module connected with the flue gas CO2 monitoring module and the biomass gasification fuel gas monitoring module respectively, and a computer processing and statistical module connected with the data acquisition and transmission module; wherein the flue gas CO2 monitoring module is used for monitoring the CO2 concentration and the flue gas flow; the biomass gasification fuel gas monitoring module is used for monitoring the biomass gasification fuel gas composition and the biomass gasification fuel gas flow; the data acquisition and transmission module is used for acquiring the monitoring data of the flue gas CO2 monitoring module and the biomass gasification fuel gas monitoring module, and transmitting the monitoring data and the production operation data to the computer processing and statistical module; the computer processing and statistical module is used for processing the received data to obtain CO2 emissions facing the enterprise boundary and the performance boundary respectively, and displaying in the form of a report.

[0042] The biomass gasification coupling unit CO2 online monitoring and metering system provided by the application realizes automatic metering of carbon emission by continuous online monitoring of key parameters of carbon emission at each link, including monitoring of flue gas CO2 concentration, flue gas flow, biomass gasification fuel gas component and biomass gasification fuel gas flow, has less daily management workload, is less affected by complexity of fuel of the unit in the monitoring process and can greatly reduce the possibility of human intervention and operation, and can obtain CO2 emission of the biomass gasification coupling unit enterprise boundary and the compliance boundary in real time, greatly improving timeliness and accuracy of carbon emission accounting data and providing data reference and decision basis for carbon trading-oriented decision.

[0043] In addition, the application also provides a corresponding metering method for the biomass gasification coupling unit CO2 online monitoring and metering system, which further makes the system more practical, and the metering method has corresponding advantages. BRIEF DESCRIPTION OF DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the application or the related art, the following will briefly introduce the drawings needed to be used in the embodiments or the related art description. Obviously, the drawings in the following description only constitute a part of the embodiments of the application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of the provided drawings.

[0045] Figure 1 The structure diagram of the biomass gasification coupling unit CO2 online monitoring and metering system provided by the embodiment of the application is shown in the figure.

[0046] Figure 2 The specific structure diagram of the biomass gasification coupling unit CO2 online monitoring and metering system provided by the embodiment of the application is shown in the figure.

[0047] Figure 3 The metering method flow chart of the biomass gasification coupling unit CO2 online monitoring and metering system provided by the embodiment of the application is shown in the figure. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments only constitute a part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the application.

[0049] The application provides a biomass gasification coupling unit CO2 online monitoring and metering system, which comprises a biomass gasification coupling unit, a flue gas CO2 concentration monitoring device, a flue gas flow monitoring device, a biomass gasification fuel gas component monitoring device and a biomass gasification fuel gas flow monitoring device. Figure 1As shown, it comprises: a flue gas CO2 monitoring module 1, a biomass gasification fuel gas monitoring module 2, a data acquisition and transmission module 3 connected with the flue gas CO2 monitoring module 1 and the biomass gasification fuel gas monitoring module 2 respectively, and a computer processing and statistical module 4 connected with the data acquisition and transmission module 3; wherein,

[0050] The flue gas CO2 monitoring module 1 is used for monitoring the flue gas CO2 concentration and the flue gas flow rate.

[0051] The biomass gasification fuel gas monitoring module 2 is used for monitoring the biomass gasification fuel gas composition and the biomass gasification fuel gas flow rate.

[0052] The data acquisition and transmission module 3 is used for acquiring the monitoring data of the flue gas CO2 monitoring module 1 and the biomass gasification fuel gas monitoring module 2, and transmitting the monitoring data and the production operation data to the computer processing and statistical module 4.

[0053] The computer processing and statistical module 4 is used for processing and operating the received data, obtaining the CO2 emission amount facing the enterprise boundary and the compliance boundary respectively, and displaying in the form of a report.

[0054] In the above biomass gasification coupled unit CO2 online monitoring and metering system provided by the embodiment of the present application, through the interaction of the above four modules, the continuous online monitoring of the key parameters of carbon emission in each link is realized, including monitoring the flue gas CO2 concentration, the flue gas flow rate, the biomass gasification fuel gas composition and the biomass gasification fuel gas flow rate, the automatic metering of carbon emission is realized, the daily management workload is less, the monitoring process is less affected by the complexity of the unit fuel and can greatly reduce the possibility of human participation and operation, and the CO2 emission amount of the biomass gasification coupled unit enterprise boundary and the compliance boundary can be obtained in real time, which greatly improves the timeliness and accuracy of the carbon emission accounting data and provides data reference and decision basis for the decision facing carbon trading.

[0055] In the specific implementation, in the above biomass gasification coupled unit CO2 online monitoring and metering system provided by the embodiment of the present application, as shown in Figure 2 The flue gas CO2 monitoring module 1 can comprise a flue gas CO2 concentration monitoring instrument 11 and a flue gas flow rate monitoring instrument 12; the flue gas CO2 concentration monitoring instrument 11 and the flue gas flow rate monitoring instrument 12 are both installed at the chimney outlet of the thermal power unit. The flue gas CO2 concentration monitoring instrument 11 can monitor the flue gas CO2 concentration by using the complete extraction method, the dilution extraction method and direct measurement, etc.; the flue gas flow rate monitoring instrument 12 can be used for monitoring parameters including the flue gas flow rate, temperature, pressure and humidity, etc.

[0056] In the specific implementation, in the above biomass gasification coupled unit CO2 online monitoring and metering system provided by the embodiment of the present application, as shown in Figure 2As shown, the biomass gasification fuel gas monitoring module 2 can include two parts of biomass gasification fuel gas component monitoring instrument 21 and biomass gasification fuel gas flow monitoring instrument 22. Among them, the biomass gasification fuel gas component monitoring instrument 21 can be used to monitor the gas including CO, CO2, CH4, C2H2, C2H4, C2H6 and C3H8; the biomass gasification fuel gas flow monitoring instrument 22 can be used to monitor the parameters including gasification fuel gas flow rate, temperature, pressure and humidity.

[0057] In the specific implementation, in the above biomass gasification coupled unit CO2 online monitoring and metering system provided by the embodiment of the application, as shown in Figure 2 As shown, the data acquisition and transmission module 3 can include a data acquisition unit 31 and a data transmission unit 32; wherein,

[0058] The data acquisition unit 31 can include a first data acquisition sub-unit 311 connected with the flue gas CO2 monitoring module 1, and a second data acquisition sub-unit 312 connected with the biomass gasification fuel gas monitoring module 2;

[0059] The data transmission unit 32 can include an industrial computer transmission sub-unit 321 connected with the first data acquisition sub-unit 311, and a DCS transmission sub-unit 322 connected with the second data acquisition sub-unit 312; wherein, the industrial computer transmission sub-unit 321 can be used to transmit the flue gas CO2 monitoring data collected by the first data acquisition sub-unit to the computer processing and statistical module through the data terminal deployed on the industrial computer of the clean flue gas environmental protection house; the DCS transmission sub-unit 322 can be used to transmit the biomass gasification monitoring data collected by the second data acquisition sub-unit to the desulfurization DCS through the data transmission cable, and transmit the biomass gasification monitoring data and production operation data to the computer processing and statistical module through the standby cable between the clean flue gas environmental protection house and the desulfurization DCS.

[0060] It should be noted that the data acquisition unit 31 mainly collects the on-site monitoring data of the thermal power unit, including the flue gas CO2 concentration monitoring parameter, the flue gas CO2 flow monitoring parameter, the biomass gasification fuel gas component monitoring parameter, the biomass gasification fuel gas flow monitoring parameter, etc. If the collected parameters are analog signals, the data acquisition unit 31 can also convert the analog signals into digital signals and store them for external transmission. The production operation data transmitted by the data transmission unit 32 can include monthly power generation data, power supply data, unit purchased power data, desulfurization tower inlet SO2 concentration, clean flue gas SO2 concentration, etc. The computer processing and statistical module 4 can be deployed in the clean flue gas environmental protection house.

[0061] In the specific implementation, in the above biomass gasification coupled unit CO2 online monitoring and metering system provided by the embodiment of the application, as shown in Figure 2As shown, the computer processing and statistical module 4 can include an online calculation processing unit 41 and a statistical report unit 42; wherein,

[0062] The online calculation processing unit 41 is used for calculating the total amount of CO2 emission in the flue gas, the amount of CO2 emission in the biomass gasification part, the amount of CO2 emission generated in the limestone-gypsum desulfurization link, and the amount of emission generated by the purchased power; the total amount of CO2 emission in the flue gas is subtracted by the amount of CO2 emission in the biomass gasification part, and the amount of emission generated by the purchased power is added, to obtain the CO2 emission amount facing the enterprise boundary; the total amount of CO2 emission in the flue gas is sequentially subtracted by the amount of CO2 emission in the biomass gasification part and the amount of CO2 emission in the limestone-gypsum desulfurization link, and the amount of emission generated by the purchased power is added, to obtain the CO2 emission amount facing the performance boundary;

[0063] The statistical report unit 42 is used for statistically processing and displaying the data of the online calculation processing unit in the form of daily report, monthly report and annual report.

[0064] Further, in the specific implementation, the online calculation processing unit 41 in the above-mentioned CO2 online monitoring and metering system for the biomass gasification coupled unit provided by the embodiment of the present application can be used for calculating the total amount of CO2 emission in the flue gas by using formula (1):

[0065]

[0066] Wherein, E CO2，烟气 is the total amount of CO2 emission in the flue gas, t / h; is the dry flue gas flow under the actual working condition, m 3 / h; C CO2 is the dry basis volume concentration of CO2 in the flue gas, %, hourly average.

[0067] The wet flue gas flow under the actual working condition is calculated by using formula (2)

[0068]

[0069] Wherein, t s is the flue gas temperature, ℃, hourly average; B a is the atmospheric pressure, Pa, hourly average; P s is the static pressure (gauge pressure) of the flue gas, Pa, hourly average; X sw is the flue gas humidity, %, hourly average; F is the area of the measured section, m 2 ; is the average flow velocity of the wet flue gas of the measured section, m / s.

[0070] Further, in the specific implementation, in the above-mentioned CO2 online monitoring and metering system of the biomass gasification coupled unit provided by the embodiment of the present application, the online calculation processing unit 41 can be specifically used for calculating the CO2 emission of the biomass gasification part according to the monitoring data of the carbon-containing components of the biomass gasification fuel gas and the flow of the gasification fuel gas by using formula (3):

[0071]

[0072] wherein, E CO2,生物质 is the CO2 emission of the biomass gasification part, t / h; is the standard dry flow of the biomass gasification fuel gas, Nm 3 / h; X j is the volume concentration of component j in the dry gasification fuel gas, %, hourly average; j is one of CO, CO2, CH4, C2H y , C3H8, and C2Hy is the sum of C2H2, C2H4 and C2H6. 22.4 is the kilomole volume, Nm 3 / kmol; 44 is the kilomole mass of CO2, kg / kmol.

[0073] Further, in the specific implementation, in the above-mentioned CO2 online monitoring and metering system of the biomass gasification coupled unit provided by the embodiment of the present application, the online calculation processing unit 41 can be specifically used for calculating the CO2 emission of the limestone-gypsum desulfurization link by using formula (4) according to the SO2 concentration at the inlet and outlet of the desulfurization tower and the flue gas flow:

[0074]

[0075] wherein, E CO2，脱硫 is the CO2 emission of the limestone-gypsum desulfurization link, t / h; is the SO2 mass concentration at the inlet of the desulfurization tower, mg / m 3 , hourly average; is the SO2 mass concentration at the outlet of the desulfurization tower, mg / m 3 , hourly average.

[0076] Further, in the specific implementation, in the above-mentioned CO2 online monitoring and metering system of the biomass gasification coupled unit provided by the embodiment of the present application, the online calculation processing unit 41 can be specifically used for calculating the emission of the purchased and used electric power by using formula (5):

[0077] E CO2，外购电 = P 电 × EF 电 (5)

[0078] wherein, ECO2，外购电 E F is the purchased power, MW; P 电 E F is the purchased power, MW; P 电 E F is the purchased power, MW; P

[0079] Next, according to different accounting requirements of greenhouse gas emissions of power generation facilities of power generation enterprises, CO2 emissions facing enterprise boundary and compliance boundary are obtained respectively, and the calculation formula is as follows:

[0080] CO2 emissions facing enterprise boundary:

[0081] E CO2，法人边界 E CO2，烟气 E CO2，生物质 E CO2，外购电 (6)

[0082] CO2 emissions facing compliance boundary are:

[0083] E CO2，履约边界 E CO2，烟气 E CO2，脱硫 E CO2，生物质 E CO2,外购电 (7)

[0084] It should be pointed out that the present application is a real-time measurement method of CO2 of biomass fuel, which is based on the measurement of CO2 concentration in flue gas and flue gas flow to obtain the total CO2 emission in flue gas, and automatically deducts the CO2 emission on the basis of the emission in flue gas, and a real-time automatic measurement method of CO2 of limestone desulfurization link is proposed to obtain the online measurement method of CO2 of power generation enterprises facing enterprise boundary and compliance boundary.

[0085] Specifically, the present application is aimed at biomass gasification coupling unit, and by deducting the calculated CO2 emission generated by biomass combustion from the total CO2 emission in flue gas, and adding the CO2 emission of purchased power, the total CO2 emission in enterprise boundary can be obtained in real time; on the basis of the above enterprise boundary, the CO2 emission in desulfurization process is calculated by the change of SO2 concentration before and after desulfurization and the flue gas flow according to the chemical reaction formula, and the CO2 emission in compliance boundary of power generation facilities of thermal power generating units can be obtained in real time, the boundary range is consistent with the CO2 emission boundary of carbon market, so that by real-time mastering of relevant data, data reference and decision basis can be provided for decision-making facing carbon trading.

[0086] Further, in specific implementation, in the above-mentioned biomass gasification coupling unit CO2 online monitoring and metering system provided by the embodiment of the present application, the statistical report unit 42 can be specifically used to obtain the corresponding cumulative CO2 emission amount by using the formulas (8) to (10) for statistics:

[0087]

[0088]

[0089]

[0090] wherein, E d is the CO2 daily emission amount, in tons per day (t / d); E hi is the CO2 emission amount of the ith hour in the day, in tons per hour (t / h); E m is the CO2 monthly emission amount, in tons per month (t / m); E di is the CO2 emission amount of the ith day in the month, in tons per day (t / d); E y is the CO2 annual emission amount, in tons per year (t / a); E' di is the CO2 emission amount of the ith day in the year, in tons per day (t / d); D m is the number of days in the month; D y is the number of days in the year.

[0091] In actual application, the present application can effectively guarantee the data monitoring quality relying on the existing environmental protection supervision system, and effectively carry out the continuous monitoring of CO2 emission and the coordinated control of pollutant emission, thereby improving the systematicness, coordination and effectiveness of supervision.

[0092] The CO2 online monitoring and metering of a test unit is described below, and the information of the test unit is shown in Table 1 as follows:

[0093] Table 1: Test unit information

[0094]

[0095] The daily report of the CO2 emission amount of the biomass gasification part of the test unit on December 12, 2021 is shown in Table 2 as follows (wherein C2H y =C2H2+C2H4+C2H6), and the final CO2 emission amount of the biomass gasification after combustion on the day is 323.606 t.

[0096] Table 2: Hourly average daily report of CO2 emission amount of example biomass gasification part

[0097]

[0098] The daily report of the CO2 emission in the flue gas is shown in Table 3, and the total CO2 emission in the flue gas on the day is 5178.53t.

[0099] Table 3: Daily report of hourly average of CO2 emission in flue gas

[0100]

[0101] The monthly report of the daily average of CO2 emission in the test unit in December is shown in Table 4, and the CO2 emission of the purchased electricity in December is 0 because the test unit is not shut down in December. Through the calculation method in the application, the CO2 emission of the test unit facing the enterprise boundary in December is 321206.18t, and the CO2 emission of the test unit facing the compliance boundary is 316237.27t.

[0102] Table 4: Monthly report of daily average of CO2 emission

[0103]

[0104] Based on the same inventive concept, the application also provides a measurement method of the biomass gasification coupled unit CO2 online monitoring measurement system. Since the principle of solving the problem of the method is similar to the biomass gasification coupled unit CO2 online monitoring measurement system, the implementation of the method can be referred to the implementation of the biomass gasification coupled unit CO2 online monitoring measurement system, and the repeated parts will not be described here.

[0105] In specific implementation, the measurement method of the biomass gasification coupled unit CO2 online monitoring measurement system provided by the application embodiment includes the following steps, as shown in Figure 3

[0106] S301, the flue gas CO2 monitoring module monitors the flue gas CO2 concentration and the flue gas flow;

[0107] S302, the biomass gasification fuel gas monitoring module monitors the biomass gasification fuel gas component and the biomass gasification fuel gas flow;

[0108] S303, the data acquisition and transmission module acquires the monitoring data of the flue gas CO2 monitoring module and the biomass gasification fuel gas monitoring module, and transmits the monitoring data and the production operation data to the computer processing and statistical module;

[0109] S304, the computer processing and statistical module processes and calculates the received data, respectively obtains the CO2 emission facing the enterprise boundary and the compliance boundary, and displays in the form of a report.

[0110] ​In the measurement method of the biomass gasification coupling unit CO2 online monitoring and measurement system provided in the embodiments of the present application, the continuous online monitoring of the flue gas CO2 concentration, flue gas flow, biomass gasification fuel gas component and biomass gasification fuel gas flow can realize automatic measurement of carbon emissions, the daily management workload is less, the monitoring process is less affected by the complexity of the unit fuel and can greatly reduce the possibility of human intervention and operation, and the CO2 emissions of the biomass gasification coupling unit enterprise boundary and the compliance boundary can be obtained in real time, which greatly improves the timeliness and accuracy of the carbon emission accounting data, and provides data reference and decision basis for carbon trading-oriented decision-making.

[0111] Further, in the measurement method of the biomass gasification coupling unit CO2 online monitoring and measurement system provided in the embodiments of the present application, the computer processing and statistical module receives the data and processes and calculates the CO2 emissions of the enterprise boundary and the compliance boundary, and displays them in the form of a report, which can include the following steps:

[0112] The online calculation processing unit calculates the total CO2 emissions in the flue gas, the CO2 emissions of the biomass gasification part, the CO2 emissions generated in the limestone-gypsum desulfurization link, and the emissions generated by the purchased and used power; the total CO2 emissions in the flue gas are subtracted by the CO2 emissions of the biomass gasification part, and the emissions generated by the purchased and used power are added to obtain the CO2 emissions of the enterprise boundary; the total CO2 emissions in the flue gas are subtracted by the CO2 emissions of the biomass gasification part and the CO2 emissions of the limestone-gypsum desulfurization link in turn, and the emissions generated by the purchased and used power are added to obtain the CO2 emissions of the compliance boundary;

[0113] The statistical report unit statistically processes and displays the data of the online calculation processing unit in the form of daily, monthly and annual reports.

[0114] The more specific working process of each step can refer to the corresponding content disclosed in the foregoing embodiments, which will not be repeated here.

[0115] Each embodiment in the specification is described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts of each embodiment can be referred to each other. For the method disclosed in the embodiments, since it corresponds to the system disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the system part.

[0116] Those skilled in the art will further appreciate that the units and algorithms described in connection with the examples disclosed herein can be embodied in electronic hardware, computer software, or combinations of both to perform the various functions described herein. As an example, the components and steps of the examples described above can be specifically configured to be part of an electronic device, such as a computer system. A software module can reside in Random Access Memory (RAM), non-volatile memory (e.g., flash memory), a hard disk drive, or other forms of storage. Any of the steps described herein can be performed electronically, e.g., using a computer system.

[0117] The steps of a method or algorithm described in connection with the examples disclosed herein can be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module can reside in Random Access Memory (RAM), non-volatile memory (e.g., flash memory), a hard disk drive, or other forms of storage. Any of the steps described herein can be performed electronically, e.g., using a computer system.

[0118] In summary, the biomass gasification coupling unit CO2 online monitoring and metering system and method provided by the embodiments of the present application comprises: a flue gas CO2 monitoring module, a biomass gasification fuel gas monitoring module, a data acquisition and transmission module connected with the flue gas CO2 monitoring module and the biomass gasification fuel gas monitoring module respectively, and a computer processing and statistical module connected with the data acquisition and transmission module; wherein the flue gas CO2 monitoring module is used for monitoring the flue gas CO2 concentration and the flue gas flow; the biomass gasification fuel gas monitoring module is used for monitoring the biomass gasification fuel gas component and the biomass gasification fuel gas flow; the data acquisition and transmission module is used for acquiring the monitoring data of the flue gas CO2 monitoring module and the biomass gasification fuel gas monitoring module, and transmitting the monitoring data and the production operation data to the computer processing and statistical module; the computer processing and statistical module is used for processing and operating the received data, respectively obtaining the CO2 emissions of the enterprise boundary and the compliance boundary, and displaying in the form of a report. The biomass gasification coupling unit CO2 online monitoring and metering system realizes automatic metering of carbon emissions through continuous online monitoring of key parameters of carbon emissions at each link, has less daily management workload, is less affected by the complexity of the unit fuel in the monitoring process, and can greatly reduce the possibility of human intervention and operation, and can obtain the CO2 emissions of the biomass gasification coupling unit enterprise boundary and the compliance boundary in real time, greatly improving the timeliness and accuracy of the carbon emission accounting data, and providing data reference and decision basis for carbon trading-oriented decision-making. In addition, the present application also provides a corresponding metering method for the biomass gasification coupling unit CO2 online monitoring and metering system, which further makes the above-mentioned system more practical, and the metering method has corresponding advantages.

[0119] Finally, it is to be understood that the phraseology or terminology such as "first" and "second" etc. used herein is merely intended to differentiate one entity or operation from another entity or operation, without necessarily requiring or implying any actual such relationship or order between such entities or operations. Moreover, the terms "comprising", "including", or any other closure, are intended to cover the non-exclusive inclusion such that a process, method, article, or apparatus that comprises a list of elements does not include those elements alone but can include other elements not expressly listed or even include elements inherent in such process, method, article, or apparatus. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.

[0120] The biomass gasification coupling unit CO2 online monitoring and metering system and method provided by the present application are described in detail above, and the principles and implementation modes of the present application are described by applying specific examples in this paper. The above example is only used to help understand the method of the present application and its core idea; at the same time, for those skilled in the art, according to the idea of the present application, the specific implementation mode and application range will be changed, and the above description should not be understood as a limitation of the present application.

Claims

1. A biomass gasification coupled unit An online monitoring metering system characterized by, Comprise: flue gas The monitoring module, the biomass gasification fuel gas monitoring module, and the flue gas The monitoring module and the biomass gasification fuel gas monitoring module are respectively connected with data acquisition and transmission modules, and a computer processing and statistical module is connected with the data acquisition and transmission modules; wherein, the flue gas a monitoring module for monitoring the flue gas concentration and flue gas flow rate; The biomass gasification fuel gas monitoring module is used for monitoring biomass gasification fuel gas components and biomass gasification fuel gas flow; The data acquisition transmission module is used for acquiring the flue gas The monitoring module and the biomass gasification fuel gas monitoring module monitor the monitoring data and transmit the monitoring data and production operation data to the computer processing and statistical module. The computer processing and statistical module is used for processing and operating the received data, calculating the total emission of carbon dioxide in the flue gas, and calculating the emission of carbon dioxide in the biomass gasification part according to the monitoring data of the carbon-containing components of the biomass gasification fuel gas and the flow of the gasification fuel gas. The second formula is as follows: The second formula is as follows: ； in, For the biomass gasification section Emissions; The standard flow rate of biomass gasification fuel; Let j be the volume concentration of component j in the gasified dry fuel gas; j is CO, , , , One of them, for , The summation with C2H6; based on the inlet and outlet of the desulfurization tower. The effect of concentration and flue gas flow rate on limestone desulfurization process Emissions are calculated using the third formula for the limestone-gypsum desulfurization process. Emissions; the third formula is: ； wherein, the limestone-gypsum method desulfurization link generated emissions; the desulfurization tower inlet mass concentration; the desulfurization tower outlet mass concentration; the actual working condition dry flue gas flow; calculate the emissions generated by the purchased and used power; utilize the total emissions of the in the flue gas minus the emissions of the biomass gasification part, and plus the emissions generated by the purchased and used power, to obtain the enterprise boundary-oriented emissions; utilize the total emissions of the in the flue gas, sequentially minus the emissions of the biomass gasification part, the emissions of the limestone-gypsum method desulfurization link, and plus the emissions generated by the purchased and used power, to obtain the compliance boundary-oriented emissions, and display in the form of a report.

2. The biomass gasification coupled set of claim 1 An online monitoring metering system characterized by, The flue gas The monitoring module comprises a flue gas A concentration monitoring instrument and a flue gas flow monitoring instrument; the flue gas The concentration monitoring instrument and the flue gas flow monitoring instrument are both installed at a chimney exhaust port of the thermal power generating unit The biomass gasification fuel gas monitoring module comprises biomass gasification fuel gas component monitoring instruments and biomass gasification fuel gas flow monitoring instruments.

3. The biomass gasification coupled set of claim 1 An online monitoring metering system characterized in that, The data acquisition and transmission module comprises a data acquisition unit and a data transmission unit; The data acquisition unit comprises a flue gas monitoring module connected with the flue gas The monitoring module is connected with a first data acquisition subunit and a second data acquisition subunit connected with the biomass gasification fuel gas monitoring module. The data transmission unit comprises an industrial computer transmission subunit connected with the first data acquisition subunit and a DCS transmission subunit connected with the second data acquisition subunit; wherein, The industrial control computer transmission subunit is used to transmit the flue gas collected by the first data acquisition subunit through the data terminal deployed on the industrial control computer of the flue gas purification and environmental protection cabin. The monitoring data is transmitted to the computer processing and statistics module; The DCS transmission subunit is used for transmitting biomass gasification monitoring data collected by the second data acquisition subunit to a desulfurization DCS through a data transmission cable, and transmitting the biomass gasification monitoring data and production operation data to the computer processing and statistical module through a backup cable between the clean flue gas environmental protection house and the desulfurization DCS.

4. The biomass gasification coupled set of claim 3 An online monitoring metering system characterized by, The computer processing and statistical module comprises an online calculation processing unit and a statistical report unit; The online calculation processing unit is configured to calculate total emissions of the flue gas, emissions of the biomass gasification part, emissions generated in a limestone-gypsum desulfurization link, and emissions generated by purchased power use. The online calculation processing unit is configured to calculate total emissions of the flue gas, emissions of the biomass gasification part, emissions generated in a limestone-gypsum desulfurization link, and emissions generated by purchased power use. The online calculation processing unit is configured to calculate total emissions of the flue gas, emissions of the biomass gasification part, emissions generated in a limestone-gypsum desulfurization link, and emissions generated by purchased power use. The online calculation processing unit is configured to calculate total emissions of the flue gas, emissions of the biomass gasification part, emissions generated in a limestone-gypsum desulfurization link, and emissions generated by purchased power use. The online calculation processing unit is configured to calculate total emissions of the flue gas, emissions of the biomass gasification part, emissions generated in a limestone-gypsum desulfurization link, and emissions generated by purchased power use. The online calculation processing unit is configured to calculate total The statistical report unit is used for statistically and displaying data of the online calculation processing unit in the form of daily report, monthly report and annual report.

5. The biomass gasification coupled set of claim 4 An online monitoring metering system characterized by, The online calculation and processing unit is specifically used to calculate the content of the flue gas using the first formula. The total emissions; the first formula is: ； wherein the total amount of emissions of ; and the dry basis volume concentration of in the flue gas.

6. The biomass gasification coupled set of claim 5 An online monitoring metering system characterized in that, The online calculation processing unit is specifically used for calculating emission generated by purchased and used power by using a fourth formula; the fourth formula is: ； wherein, is the emission amount for the purchased electricity generation; is the power for the purchased electricity consumption; is the grid emission factor.

7. A biomass gasification coupled unit as claimed in any one of claims 1 to 6 Method for monitoring and metering a metering system on-line, characterized in that Comprise: flue gas the monitoring module monitors the flue gas concentration and flue gas flow rate; The biomass gasification fuel gas monitoring module is used for monitoring biomass gasification fuel gas components and biomass gasification fuel gas flow; The data acquisition and transmission module acquires the flue gas The monitoring module monitors the monitoring data of the biomass gasification fuel gas monitoring module and transmits the monitoring data and production operation data to the computer processing and statistical module. The computer processing and statistical module processes the received data, calculates the total amount of emissions in the flue gas ; according to the monitoring data of the carbon-containing components of the biomass gasification fuel gas and the flow of the gasification fuel gas, the second formula is used to calculate the emissions of the biomass gasification part ; the second formula is: ； in, For the biomass gasification section Emissions; The standard flow rate of biomass gasification fuel; Let j be the volume concentration of component j in the gasified dry fuel gas; j is CO, , , , One of them, for , The summation with C2H6; based on the inlet and outlet of the desulfurization tower. The effect of concentration and flue gas flow rate on limestone desulfurization process Emissions are calculated using the third formula for the limestone-gypsum desulfurization process. Emissions; the third formula is: ； wherein, the limestone-gypsum method desulfurization link generated emissions; the desulfurization tower inlet mass concentration; the desulfurization tower outlet mass concentration; the actual working condition dry flue gas flow; calculate the emissions generated by the purchased and used electricity; utilize the total emissions of the in the flue gas minus the emissions of the biomass gasification part and plus the emissions generated by the purchased and used electricity, to obtain the enterprise boundary-oriented emissions; utilize the total emissions of the in the flue gas in turn minus the emissions of the biomass gasification part , the limestone-gypsum method desulfurization link generated emissions, and plus the emissions generated by the purchased and used electricity, to obtain the compliance boundary-oriented emissions, and display in the form of a report.

8. The biomass gasification integrated generator set according to claim 7 Method for monitoring a metering system online, characterized in that In the form of report, comprising: The statistical report unit will be oriented to the enterprise boundary and the performance boundary The data of the emission amount is counted and displayed in the form of daily report, monthly report and annual report.

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