Global assessment system and method of potential environmental impact of flue gas

Abstract

A global environmental impact assessment system and method for flue gas, belonging to the field of flue gas pollutant detection and assessment technology, solves the problem that the environmental impact of multiple pollutants in industrial flue gas cannot be uniformly and quantitatively assessed. The system includes a flue gas collector, a filter, a pollutant component analysis unit, and an environmental impact calculation and display unit. The method involves: collecting and filtering the flue gas to be tested, detecting the volume fractions of pollutants such as [missing information], [missing information], and [missing information]; calculating the comprehensive chemical environmental impact value (PEI) of the flue gas to be tested based on pollutant emission standards and the standard chemical environmental impact value per unit volume fraction of each pollutant as the PEI; simultaneously calculating the total standard chemical environmental impact value according to pollutant emission standards and setting an evaluation level threshold, and obtaining the environmental impact level through comparison. This invention introduces the concept of [missing information] from thermodynamics into environmental assessment, providing a single quantitative indicator. It is applicable to the comprehensive evaluation of the comparability of different pollutants.

Description

Technical Field

[0001] This invention belongs to the field of flue gas pollutant detection and assessment technology, specifically relating to a global assessment system and method for the potential environmental impact of flue gas. Background Technology

[0002] Industrial flue gas contains carbon dioxide ( ), sulfur dioxide ( ), nitrogen oxides ( Pollutants such as flue gas, and their emissions are a major cause of air pollution and climate change. Currently, assessments of the environmental impact of flue gas primarily rely on monitoring the concentrations of various pollutants and determining whether emissions meet environmental standards. However, this traditional method has significant limitations: firstly, it cannot provide a unified, measurable, and comprehensive evaluation of the environmental impacts of different types of pollutants. For example, it cannot compare the effects of the same mass of... and The magnitude of the potential environmental impact is a concern. Secondly, it cannot provide a single, quantitative indicator of the overall environmental impact of flue gas, making it difficult to use for horizontal comparisons of environmental protection levels across different factories and processes. This also presents technical difficulties for the refined implementation of environmental economic policies such as emissions trading and carbon trading. Summary of the Invention

[0003] This invention aims to address the problem that the impact of industrial flue gas pollutants cannot be uniformly and quantitatively evaluated. It provides a global evaluation system and method for the potential environmental impact of flue gas.

[0004] The first aspect of this application provides a global assessment system for the potential environmental impact of flue gas, the system comprising: a flue gas collector, a filter, a pollutant composition analysis unit, and an environmental impact calculation and display unit;

[0005] The flue gas collector's flue gas input end is connected to the flue gas pipeline to be tested, and the flue gas output end of the flue gas collector is connected to the pollutant composition analysis unit via a filter. The filter is used to remove solid particles from the flue gas.

[0006] The pollutant composition analysis unit uses an analytical column to separate pollutant gases and uses a detector to detect the volume fraction of the separated gaseous pollutants, and transmits the detected volume fraction to the environmental impact calculation and display unit 6.

[0007] The environmental impact calculation and display unit calculates the comprehensive chemical emission value of the flue gas under test by calling the standard chemical emission value of each pollutant per unit volume fraction based on the pollutant emission standards; at the same time, it calculates the total standard chemical emission value of all pollutants according to the emission standards of each pollutant, and sets the evaluation level and its corresponding threshold according to the total standard chemical emission value.

[0008] The environmental impact calculation and display unit also compares the chemical odor values ​​of all pollutants in the current flue gas with the thresholds corresponding to the evaluation levels to obtain the environmental impact levels of all pollutants in the current flue gas, thereby achieving a global evaluation of the potential environmental impact of the flue gas.

[0009] A second aspect of this application provides a global assessment method for the potential environmental impact of flue gas, the method comprising:

[0010] Step S1: Collect and filter the flue gas to be tested, and detect the volume fraction of pollutants therein, including... , and ;

[0011] Step S2: Based on the pollutant emission standards and the standard chemical odor values ​​per unit volume fraction of each pollutant, calculate the comprehensive chemical odor value of each pollutant in the flue gas to be tested;

[0012] Step S3: Calculate the total standard chemical emission value of all pollutants according to the emission standards for each pollutant, and set the evaluation level and its corresponding threshold according to the total standard chemical emission value;

[0013] By comparing the chemical values ​​of all pollutants in the current flue gas with the evaluation level threshold, the environmental impact level of all pollutants in the current flue gas is obtained, thus achieving a global assessment of the potential environmental impact of the flue gas.

[0014] This invention introduces the concept of ∠A / ∠B ... Attached Figure Description

[0015] Figure 1 A schematic diagram of a global assessment system for the potential environmental impacts of flue gas;

[0016] Figure 2 A flowchart of a global assessment method for the potential environmental impacts of flue gas. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0018] Specific implementation method one: Refer to Figure 1 This embodiment describes a global environmental impact assessment system for flue gas, which includes: a flue gas collector 1, a filter 2, a pollutant composition analysis unit 3, and an environmental impact calculation and display unit 6.

[0019] The flue gas collector 1 has its flue gas input end connected to the flue gas pipeline to be tested, and its flue gas output end is connected to the pollutant composition analysis unit 3 via a filter 2. The filter 2 is used to filter out solid particles in the flue gas.

[0020] The pollutant composition analysis unit 3 uses an analysis column 4 to separate pollutant gases and a detector 5 to detect the volume fraction of the separated gaseous pollutants, and transmits the detected volume fraction to the environmental impact calculation and display unit 6.

[0021] The environmental impact calculation and display unit 6 calculates the comprehensive chemical value of the flue gas under test by calling the standard chemical value of each pollutant per unit volume fraction based on the pollutant emission standards; at the same time, it calculates the total standard chemical value of all pollutants according to the emission standards of each pollutant, and sets the evaluation level and its corresponding threshold according to the total standard chemical value.

[0022] The environmental impact calculation and display unit 6 also compares the chemical odor values ​​of all pollutants in the current flue gas with the thresholds corresponding to the evaluation levels to obtain the environmental impact levels of all pollutants in the current flue gas, thereby achieving a global evaluation of the potential environmental impact of the flue gas.

[0023] The pollutant composition analysis unit 3 includes multiple sets of detection units, each set of detection units detects one pollutant. The detection unit includes an analysis column 4 and a detector 5. The analysis column 4 is used to separate the pollutant gas, and the detector 5 detects the volume fraction of the pollutant.

[0024] Furthermore, in this invention, the initial temperature of the analytical column 4 is 50℃-60℃, the heating rate is 5-20℃ / min, the temperature is raised to 120℃-200℃, and held for 3min-5min.

[0025] Furthermore, in this invention, the formula for calculating the comprehensive chemical toxicity value of all pollutants in the current flue gas is:

[0026]

[0027] Among them, PEI is the comprehensive chemical chromatogram of all pollutants in the current flue gas. Let i be the volume fraction of pollutant i. The standard chemical substance for pollutant i is PEI. The higher the PEI value, the greater the potential negative impact of the flue gas on the environment.

[0028] Specific Implementation Method Two: Refer to Figure 2 This embodiment specifically describes a global assessment method for the potential environmental impact of flue gas, which includes:

[0029] Step S1: Collect and filter the flue gas to be tested, and detect the volume fraction of pollutants therein, including... , and ;

[0030] Step S2: Based on the pollutant emission standards and the standard chemical odor values ​​per unit volume fraction of each pollutant, calculate the comprehensive chemical odor value of each pollutant in the flue gas to be tested;

[0031] Step S3: Calculate the total standard chemical emission value of all pollutants according to the emission standards for each pollutant, and set the evaluation level and its corresponding threshold according to the total standard chemical emission value;

[0032] By comparing the chemical values ​​of all pollutants in the current flue gas with the evaluation level threshold, the environmental impact level of all pollutants in the current flue gas is obtained, thus achieving a global assessment of the potential environmental impact of the flue gas.

[0033] Furthermore, in this invention, the evaluation levels are set according to the total standard chemical value, including excellent level, early warning level, alarm level, and serious exceedance level;

[0034] The maximum value of the excellent grade is The corresponding potential environmental impact of the flue gas is: the overall emission impact is better than the standard value. The system is operating well;

[0035] The threshold range for the aforementioned warning level is: Up to 1.2 ;

[0036] The threshold range for the alarm level is 1.2. Up to 1.5 ;

[0037] The threshold range for the severe exceedance level is greater than 1.5. .

[0038] The standard chemical spectroscopy and PEI warning range of flue gas pollutants described in this invention The standard value is obtained through calculation using standard chemical formulas and is the upper limit value.

[0039] Table 1 Standard Chemical Specifications for Flue Gas Pollutants

[0040]

[0041] Table 2 PEI Warning Zone Table

[0042]

[0043] A preferred embodiment of the present invention: This system is installed after the flue gas desulfurization and denitrification facility in a coal-fired power plant. The system analyzes and determines the volume fraction of the main pollutants in the purified flue gas as follows: 12%, 0.03%, 0.01%, 0.005%. The environmental impact and display unit 6 uses its built-in database for calculations.

[0044] Table 3. Potential Environmental Impacts of Pollutants in Flue Gas from a Certain Boiler

[0045]

[0046] Table 4. PEI calculated based on the standard value for coal-fired boilers (GB 13271-2014).

[0047]

[0048] Table 5. PEI calculated based on the standard value for thermal power generation (GB 13271-2014).

[0049]

[0050] Tables 4 and 5 show the PEI values ​​calculated based on the above standard values ​​(which are determined according to the standards of different countries) (using a molar volume of 22400 mol / m³ under standard conditions). The equipment will automatically calculate the flue gas PEI value and issue a warning. As shown in Table 3, the PEI value in the flue gas... and If the sum of the PEIs is 105.69 kJ / kmol, exceeding the PEI requirements of the two national standards by more than 1.5 times, the equipment will display a red warning. At this time, the fault should be investigated immediately, and production restrictions or shutdown for rectification should be considered. Simultaneously, the system provides the PEI value for carbon dioxide. If local carbon trading policies require enterprises to control emissions, this value will be automatically connected to the carbon management platform to generate a carbon emission report and issue a warning of excess risk.

[0051] Another preferred embodiment of the invention: This system is installed in the exhaust flue of a gas turbine in a natural gas combined cycle power plant (NGCC). Because the flue gas is relatively clean with few particulate matter, the system focuses on the precise analysis of low-concentration pollutants. The system detects the volume fraction of the main pollutants in the flue gas as follows: 3.8%, 0.0005%, 0.001%, : 0.001%, and calculate its PEI.

[0052] Table 6. Potential Environmental Impacts of Pollutants in a Gas Turbine Exhaust Flue

[0053]

[0054] Table 7. Emission limits for gas turbine units fueled by gas as specified in GB 13223-2011 and their corresponding PEI tables.

[0055]

[0056] The system compares the current PEI of nitrogen and sulfur oxides in the flue gas with the national standard PEI. lim (5.19 kJ / kmol) was compared. The current PEI is 1.2. (6.23 kJ / kmol) and 1.5 (between 7.79 kJ / kmol). Although and The concentration is below the national standard, but its overall PEI value has triggered an alarm. The system interface displays a yellow "alarm" level. The warning message states: "The overall impact has significantly exceeded the emission benchmark for high-quality clean energy." The system can further monitor real-time... The PEI value is integrated into the enterprise carbon data management system, providing a real-time and continuous data source for carbon quota settlement and carbon trading decisions.

[0057] The table below shows a detailed comparison of the core advantages of this method compared to traditional methods:

[0058] Table 8. Comparison of the advantages of PEI and traditional methods

[0059]

[0060] This invention successfully transplants the concept of ε from thermodynamics from the field of energy assessment to the field of environmental assessment. It achieves a leap from individual monitoring to comprehensive evaluation: solving the problem of the inability to uniformly measure the impact of different pollutants in the environmental protection field, generating an intuitive and comparable single indicator (PEI), greatly facilitating environmental management decision-making. The evaluation results are scientifically profound: the PEI value considers not only the quantity (concentration) of pollutants, but also their "quality" (potential destructive power to the environment), reflecting the essential impact of emissions more effectively than simple concentration monitoring. It provides a new tool for environmental management: the system can provide a more scientific pricing basis for the polluter-pays principle, promoting the healthy development of the emissions trading market, and is a powerful technological innovation in the field of environmental management.

[0061] While the invention has been described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the invention. Therefore, it should be understood that many modifications can be made to the exemplary embodiments, and other arrangements can be designed without departing from the spirit and scope of the invention as defined by the appended claims. It should be understood that different dependent claims and features described herein can be combined in ways different from those described in the original claims. It is also understood that features described in conjunction with individual embodiments can be used in other described embodiments.

Claims

1. A global assessment system for the potential environmental impacts of flue gas, characterized in that, The system includes: a flue gas collector (1), a filter (2), a pollutant composition analysis unit (3), and an environmental impact calculation and display unit (6); The flue gas collector (1) has its flue gas input end connected to the flue gas pipeline to be tested, and its flue gas output end is connected to the pollutant composition analysis unit (3) via a filter (2). The filter (2) is used to filter out solid particles in the flue gas. The pollutant composition analysis unit (3) uses an analysis column (4) to separate pollutant gases and uses a detector (5) to detect the volume fraction of the separated gaseous pollutants, and transmits the detected volume fraction to the environmental impact calculation and display unit (6). The environmental impact calculation and display unit (6) calculates the comprehensive chemical value of the flue gas to be tested by calling the standard chemical value of each pollutant per unit volume fraction based on the pollutant emission standards; at the same time, it calculates the total standard chemical value of all pollutants according to the emission standards of each pollutant, and sets the evaluation level and its corresponding threshold according to the total standard chemical value. The environmental impact calculation and display unit (6) also compares the chemical saturation values ​​of all pollutants in the current flue gas with the threshold corresponding to the evaluation level to obtain the environmental impact level of all pollutants in the current flue gas, thereby realizing a global evaluation of the potential environmental impact of the flue gas.

2. The global environmental impact assessment system for flue gas according to claim 1, characterized in that, The initial temperature of the analytical column (4) is 50℃-60℃, the heating rate is 5-20℃ / min, the temperature is raised to 120℃-200℃, and held for 3min-5min.

3. The global environmental impact assessment system for flue gas according to claim 1, characterized in that, The formula for calculating the comprehensive chemical toxicity value of all pollutants in the current flue gas is: in, This represents the combined chemical values ​​of all pollutants in the current flue gas. Let i be the volume fraction of pollutant i. The standard chemical for pollutant i.

4. A global assessment method for the potential environmental impacts of flue gas, characterized in that, The method includes: Step S1: Collect and filter the flue gas to be tested, and detect the volume fraction of pollutants in the filtered flue gas. The pollutants include... , and ; Step S2: Based on the pollutant emission standards and the standard chemical odor values ​​per unit volume fraction of each pollutant, calculate the comprehensive chemical odor value of each pollutant in the flue gas to be tested; Step S3: Calculate the total standard chemical emission value of all pollutants according to the emission standards for each pollutant, and set the evaluation level and its corresponding threshold according to the total standard chemical emission value; By comparing the chemical odor values ​​of all pollutants in the current flue gas with the threshold values ​​corresponding to the evaluation level, the environmental impact level of all pollutants in the current flue gas is obtained, thus achieving a global assessment of the potential environmental impact of the flue gas.

5. The global assessment method for the potential environmental impact of flue gas according to claim 4, characterized in that, The evaluation levels are set according to the total standard chemical value, including excellent level, early warning level, alarm level and serious exceedance level; The maximum value of the excellent grade is The corresponding potential environmental impact of flue gas is as follows: the overall impact of boiler emissions is better than the national standard, and the system is operating well; These are pollutant standard values; The threshold range for the aforementioned warning level is: Up to 1.2 ; The threshold range for the alarm level is 1.

2. Up to 1.5 ; The threshold range for the severe exceedance level is greater than 1.

5. .

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