CN113807626A - Pollution census-based atmospheric pollutant emission reduction grading method for power and heating power industries - Google Patents
Pollution census-based atmospheric pollutant emission reduction grading method for power and heating power industries Download PDFInfo
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Abstract
The invention belongs to the field of environmental protection, and particularly relates to an atmospheric pollutant emission reduction grading method in the power and heating power industry based on pollution census. The method comprises the following steps: the method comprises the following steps: collecting the production and emission data of pollutants of an enterprise to be evaluated; step two: calculating the treatment rate of the corresponding pollutants; step three: calculating the electric power of all waste gas treatment processes and the treatment rate of pollutants of a heating power enterprise; step four: solving the minimum value, 1/4 quantile value, 1/2 quantile value, 3/4 quantile value and the maximum value of each pollutant treatment rate; step five: dividing the emission reduction level of the enterprise pollutants into 4 levels, and correspondingly assigning each level to establish an atmospheric pollutant emission reduction grading evaluation method; step six: and adding the emission reduction scores of all atmospheric pollutants of the enterprise to obtain a total score, wherein the higher the total score is, the better the emission reduction of the waste gas is, and the lower the score is, the worse the emission reduction of the waste gas is. The method has higher pertinence and accuracy in evaluating the emission reduction effect of specific enterprises in the power and heating power industries.
Description
Technical Field
The invention belongs to the field of environmental protection, and particularly relates to a pollution census-based electric power and thermal industry atmospheric pollutant emission reduction grading method.
Background
According to the atmospheric pollution general survey result of the national industrial sources in 2017, the power and heat production supply industry is the most main industrial source of nitrogen oxide, particulate matters, sulfur dioxide and heavy metal (containing mercury, chromium, cadmium, lead and arsenic) waste gas, and the emission total accounts for 31%, 30% and 13% respectively.
The main regulation of pollution control in the power industry is still ultra-low emission, the emission of smoke dust in the power industry can be reduced to 20-30 ten thousand tons, the emission of sulfur dioxide can be reduced to 100-150 ten thousand tons, and the emission of nitrogen oxide can be reduced to 100-150 ten thousand tons. Therefore, the atmospheric pollution emission reduction work in the power and heating power industry is concerned.
Compared with other industrial industries, the application of the ultra-low emission technology in the power and heat production supply industry has a certain scale and obtains excellent emission reduction effect, but the pollutant emission reduction evaluation method for specific power and heat enterprises is not updated in time, mainly prolongs the management method of total amount control and concentration control, and is not suitable for the investigation and evaluation of the ultra-low emission result in the power and heat production supply industry. In order to objectively and accurately reflect the emission reduction conditions of power and thermal power production enterprises, an emission reduction grading evaluation method for atmospheric pollutants in the power and thermal power industry based on pollution census is provided.
Disclosure of Invention
The invention aims to provide an atmospheric pollutant emission reduction grading method in the power and heating power industry based on pollution census.
In order to realize the purpose of the invention, the following scheme is adopted:
an atmospheric pollutant emission reduction grading method based on pollution census in the power and heating power industry comprises the following steps:
the method comprises the following steps: collecting the production and emission data of pollutants of an enterprise to be evaluated, and constructing an evaluation index;
step two: calculating the treatment rate of the corresponding pollutants according to the pollutant output data obtained in the step one; the pollutant treatment rate eta calculation method comprises the following steps:
wherein eta is the treatment rate of a certain pollutant;
i is the type of contaminant;
p is the generation amount of pollutants, and the unit ton is;
d is the discharge amount of pollutants, and the unit is ton;
step three: calculating the electric power of all waste gas treatment processes and the treatment rate of the thermal power enterprise pollutants according to the second national industrial source atmospheric pollution census data;
step four: calculating the processing rate data of the national power and thermal production enterprises according to the third step, and solving the minimum value, 1/4 quantile value, 1/2 quantile value, 3/4 quantile value and the maximum value of the processing rate of each pollutant;
step five: taking 5 quartile sites of the pollutant treatment rate obtained in the step four as division nodes of atmospheric pollution emission reduction classification, dividing the enterprise pollutant emission reduction grade into 4 grades, and correspondingly assigning each grade to establish an atmospheric pollutant emission reduction classification evaluation method;
step six: and adding the emission reduction scores of all atmospheric pollutants of the enterprise to obtain a total score, wherein the higher the total score is, the better the emission reduction of the waste gas is, and the lower the score is, the worse the emission reduction of the waste gas is.
The pollutant production and emission data comprise: the amount of nitrogen oxides, sulfur dioxide, particulate matter, and heavy metal exhaust gases.
Heavy metals include mercury, chromium, cadmium, lead, and arsenic.
And the quartile value of the pollutant treatment rate in the fourth step is obtained through the data analysis function of SPSS analysis software.
Dividing the emission reduction level of the pollutants of the enterprise into 4 levels, and correspondingly assigning a score to each level; the higher the pollutant treatment rate, the higher the fraction, the lower the treatment rate, the lower the fraction, the maximum emission reduction score of 100 and the minimum score of 25 for each pollutant.
And sixthly, adding the emission reduction scores of all the atmospheric pollutants to calculate a total score, wherein the minimum total score is 100, the maximum total score is 400, and correspondingly dividing emission reduction comprehensive evaluation: poor, passing, good and excellent 4 evaluation results.
In the formula: g is the total score of atmospheric pollution emission reduction of the power and heat production supply enterprises;
Githe method is used for reducing emission of single pollutants of power and heat production supply enterprises;
i is a contaminant species.
Compared with the prior art, the invention has the beneficial effects that:
the existing industrial enterprise pollution emission evaluation mostly takes the total amount of pollutant emission and the pollutant emission concentration as indexes, and is not suitable for the previous single total amount and concentration index due to large exhaust emission, low concentration and high emission reduction requirement in the power and heat production supply industry. The invention carries out grading evaluation according to the pollutant treatment rate, and can better balance the ultra-discharge effect of power and heating power enterprises. The grading index of the scheme covers 4 pollutants with the largest discharge amount in the power and heat power industries, and index division nodes are from analysis and arrangement of the discharge data of the pollutants of the second national industrial pollution source general survey power and heat power production supply industry. Therefore, the evaluation of the emission reduction effect of specific enterprises in the power and heating power industry by applying the method has higher pertinence and accuracy.
Detailed Description
In order that those skilled in the art will better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the following embodiments;
example (b): given the main atmospheric pollution production and emission situations of thermal power enterprises, the pollution emission reduction situation of the thermal power enterprises is evaluated by applying a power and thermal power industry atmospheric pollutant emission reduction grading evaluation method based on pollution census.
The method comprises the following steps:
the method comprises the following steps: collecting the production and emission data of the pollutants of the enterprises to be evaluated according to the types and characteristics of the main atmospheric pollutants in the electric power and thermal power industries, and carrying out arrangement and induction to construct evaluation indexes; wherein, the exhaust gas is produced and is discharged data and mainly includes: the production and emission of nitrogen oxides, the production and emission of sulfur dioxide, the production and emission of particulate matter, and the production and emission of heavy metal exhaust gases (containing mercury, chromium, cadmium, lead, and arsenic) were evaluated using the treatment rates of 4 pollutants as evaluation indices. The main exhaust gas production of the plant in this example is shown in table 1:
TABLE 1
Step two: calculating the treatment rate of the corresponding pollutants according to the pollutant output data obtained in the step one; the method for calculating the treatment rate eta of the pollutants comprises the following steps:
in the formula: eta is the treatment rate of a certain pollutant; i is the type of contaminant; p is the generation amount of pollutants, and is ton per unit; d is the discharge amount of pollutants, and the unit is ton;
the calculation results of the treatment rates of the main atmospheric pollutants of the enterprises are shown in the following table 2:
TABLE 2
Step three: calculating the treatment rates of nitrogen oxides, sulfur dioxide, particulate matters and heavy metal waste gas of all waste gas treatment processes (indirect emission) in power and heating power enterprises according to the second national industrial source atmospheric pollution census data;
and calculating the treatment rates of pollutants of the treatment rates of the electric power, the nitrogen oxides, the sulfur dioxide, the particulate matters and the heavy metal waste gas of all the waste gas treatment processes, wherein the calculation method of the treatment rates is the same as the method in the step two, and the condition that part of enterprises do not have treatment process pollutants and directly discharge the treatment process pollutants into the air and the treatment rate is 0 is eliminated in the calculation process.
Step four: and calculating the treatment rate data of the national power and thermal production enterprises according to the third step, and solving the minimum value, 1/4 quantile value, 1/2 quantile value, 3/4 quantile value and the maximum value of the treatment rate of each pollutant.
Wherein, the quartile value of the pollutant treatment rate is obtained by the data analysis function of SPSS analysis software, as shown in the following table 3;
TABLE 3
Step five: and taking 5 quartile sites of the pollutant treatment rate obtained in the step four as division nodes for grading the emission reduction of the atmospheric pollution, dividing the emission reduction level of the pollutants of the enterprise into 4 levels, and correspondingly assigning each level to establish a grading evaluation method for the emission reduction of the atmospheric pollutants. The emission reduction grade of the pollutants of the enterprise is divided into 4 grades, and each grade is assigned with a corresponding mark. The higher the pollutant treatment rate, the higher the fraction, the lower the treatment rate, the lower the fraction, the maximum emission reduction score of 100 and the minimum score of 25 for each pollutant. Specifically, the following tables 4 to 7 respectively show emission reduction scores of nitrogen oxides, sulfur dioxide, particulate matters and heavy metal exhaust gas.
TABLE 4
TABLE 5
TABLE 6
TABLE 7
The scoring conditions of the thermal power enterprises can be obtained by comparing 4 pollutant emission reduction grading evaluation tables, and are shown in table 8:
TABLE 8
Step six: and adding the emission reduction scores of all atmospheric pollutants of the enterprise to obtain a total score, wherein the higher the total score is, the better the emission reduction of the waste gas is, and the lower the score is, the worse the emission reduction of the waste gas is. Wherein, the total score G is obtained by adding the emission reduction scores of all the atmospheric pollutants, and the calculation method is as follows. The lowest total score is 100, the highest total score is 400, and the comprehensive evaluation level of the emission reduction of the enterprise is correspondingly determined: poor, fair, good and excellent. The total partition is shown in Table 9.
In the formula: g is the total score of atmospheric pollution emission reduction of the power and heat production supply enterprises; giThe method provides the enterprise with the emission reduction of single pollutants for the power and heat production; i is a pollution species;
TABLE 9
General division G of thermal power enterprise1+G2+G3+G4The grade is 375, the exhaust emission reduction of the A thermal power enterprise is judged as excellent grade, so that the overall effect of exhaust emission reduction of the A thermal power enterprise is better, and the treatment of heavy metal exhaust gas needs to be enhanced.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the invention.
Claims (6)
1. An atmospheric pollutant emission reduction grading method in the power and heating power industry based on pollution census is characterized by comprising the following steps:
the method comprises the following steps: collecting the production and emission data of pollutants of an enterprise to be evaluated, and constructing an evaluation index;
step two: calculating the treatment rate of the corresponding pollutants according to the pollutant output data obtained in the step one; the pollutant treatment rate eta calculation method comprises the following steps:
wherein eta is the treatment rate of a certain pollutant;
i is the type of contaminant;
p is the generation amount of pollutants, and the unit ton is;
d is the discharge amount of pollutants, and the unit is ton;
step three: calculating the electric power of all waste gas treatment processes and the treatment rate of the thermal power enterprise pollutants according to the second national industrial source atmospheric pollution census data;
step four: calculating the processing rate data of the national power and thermal production enterprises according to the third step, and solving the minimum value, 1/4 quantile value, 1/2 quantile value, 3/4 quantile value and the maximum value of the processing rate of each pollutant;
step five: dividing the enterprise pollutant emission reduction grade into 4 grades according to the division nodes of the pollutant treatment rate 5 quartile sites obtained in the step four as the atmospheric pollution emission reduction grade, and establishing an atmospheric pollutant emission reduction grade evaluation method by correspondingly assigning a score to each grade;
step six: and adding the emission reduction scores of all atmospheric pollutants of the enterprise to obtain a total score, wherein the higher the total score is, the better the emission reduction of the waste gas is, and the lower the score is, the worse the emission reduction of the waste gas is.
2. The electric power and thermal industry atmospheric pollutant emission reduction grading method based on pollution census as claimed in claim 1, wherein the pollutant production and emission data comprises: the amount of nitrogen oxides, sulfur dioxide, particulate matter, and heavy metal exhaust gases.
3. The pollution census-based electric power and thermal industry atmospheric pollutant emission reduction grading method according to claim 2, wherein the heavy metals comprise mercury, chromium, cadmium, lead, and arsenic.
4. The pollution census-based atmospheric pollutant emission reduction grading method for the power and thermal industry according to claim 1, wherein the quartile value of the pollutant treatment rate in step four is obtained through the data analysis function of SPSS analysis software.
5. The pollution census-based atmospheric pollutant emission reduction grading method for the power and thermal power industry according to claim 1, wherein in the fifth step, the emission reduction grade of the pollutants of the enterprise is divided into 4 grades, and each grade is assigned with a score; the higher the pollutant treatment rate, the higher the fraction, the lower the treatment rate, the lower the fraction, the maximum emission reduction score of 100 and the minimum score of 25 for each pollutant.
6. The pollution-census-based atmospheric pollutant emission reduction grading method for the power and thermal power industry as claimed in claim 1, wherein the total score is calculated by summing emission reduction scores of all atmospheric pollutants in the sixth step, the total score is 100 at the lowest and 400 at the highest, and the emission reduction comprehensive evaluation is correspondingly divided: poor, passing, good and excellent 4 evaluation results.
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