CN113065102A - Re-electrification sulfur-nitrogen atmospheric pollutant emission reduction calculation method - Google Patents

Re-electrification sulfur-nitrogen atmospheric pollutant emission reduction calculation method Download PDF

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CN113065102A
CN113065102A CN202110340285.3A CN202110340285A CN113065102A CN 113065102 A CN113065102 A CN 113065102A CN 202110340285 A CN202110340285 A CN 202110340285A CN 113065102 A CN113065102 A CN 113065102A
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梁俊宇
杨洋
杨家全
袁兴宇
罗恩博
李浩涛
李秋硕
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Electric Power Research Institute of Yunnan Power Grid Co Ltd
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Abstract

The invention relates to a method for calculating the emission reduction amount of sulfur and nitrogen atmospheric pollutants of re-electrification, which is used for estimating the influence of electric energy substitution on the emission of sulfur dioxide and nitrogen oxides in atmospheric pollution by calculating the amount of sulfides and nitrogen oxides in the emission of the atmospheric pollutants in two time periods in a certain space range. The emission reduction effect of two periods of comparison can be calculated, the relevant benefits of the electric energy replacement policy implementation on the environment are quantized, and the sulfur and nitrogen emission reduction effect of national electric energy replacement is more accurately evaluated.

Description

Re-electrification sulfur-nitrogen atmospheric pollutant emission reduction calculation method
Technical Field
The application relates to the technical field of environmental protection, in particular to a method for calculating the emission reduction amount of sulfur and nitrogen atmospheric pollutants of re-electrification.
Background
Sulfur dioxide (SO2) is one of the main atmospheric pollutants, among the five main atmospheric pollutants (CO, SO)2The content of HC (hydrocarbons), TSP (total suspended particulate matter) and NOx) is about 15%, which is the main indicator for ambient atmospheric monitoring. The amount of the fuel produced by burning the fossil fuel is about 70% or more. SO (SO)2The life in the air is generally only a few days, sulfurous acid is generated when the smoke generating agent meets water, and metal ions such as iron, manganese and the like in dust particles are catalytically oxidized into sulfuric acid mist and sulfate aerosol, so that the atmospheric visibility is reduced, which is a forming mechanism of London type smoke. SO (SO)2Along with NOx, is also a material that forms acid rain. These sulfate aerosols can migrate with atmospheric flow to distances many thousands of kilometers away, creating long-range or wide-area pollution. SO (SO)2Is colorless and odorous irritant gas, enters the respiratory tract of a human body, can irritate the trachea and the bronchus to narrow the lumen, increase the resistance of the airway and cause dyspnea. SO (SO)2Can be combined with inhalable dust particles to enter the lung along with respiration, and can cause fibrosis of the lung to form diseases such as emphysema and the like. SO at concentrations above the injury threshold2Is an atmospheric pollutant which has obvious harm to plants and can cause the necrosis of leaves when being serious. In addition, SO2It can also corrode metal parts, destroying paper, textile, leather, etc.
Nitrogen oxide is a main pollutant directly or indirectly causing atmospheric environmental pollution, and nitrogen dioxide has strong irritation and larger toxicity than sulfur dioxide; they are mainly produced by industrial and domestic combustion of fossil fuels. The nitrogen dioxide in the atmosphere reacts with rainwater to generate nitric acid or nitrate to form acid rain, or the nitric acid or the nitrate is precipitated to soil or water in the form of nitrate particles to cause acidification. The nitrogen oxides (mainly NOx and N2O) entering the high-rise atmosphere can play a role in catalyzing and promoting the damage of the ozone layer, and further can cause environmental pollution effects such as global climate change and ecological environment change.
The sulfur dioxide and the nitrogen oxide have great harm and are main control objects in atmospheric pollution emission indexes of all countries in the world including China. Considering that the urban pollution emission sources are many and the density of residents is high, in order to control emission and protect the life safety and health of people, electric energy substitution technology is advocated in China and many countries in the world.
The guidance on the promotion of electric energy replacement indicates that the implementation of electric energy replacement is an important way to implement the national energy development strategy, reduce atmospheric pollution, promote the energy consumption revolution and supply-side structural reform. The national power development planning electric energy replaces newly-added electricity consumption of about 4500 hundred million kilowatt hours, and the specific target that the electric energy accounts for 27% of the terminal energy consumption proportion is achieved. In order to further promote power consumption, improve an energy utilization structure and reduce enterprise burden, the electricity price is reduced for many times in recent years in China.
One of the main purposes of implementing electric energy substitution is to reduce atmospheric pollution emission, and meanwhile, in the policy implementation process, a plurality of projects and projects reduce pollution emission through technical structure adjustment or upgrading (or the emission is transferred to a remote area for dilution, so that the influence on crowds is reduced).
Therefore, the influence factors and parameters of the electric energy substitution on the emission of the atmospheric pollution are numerous, and the problem of accurately estimating the influence of the electric energy substitution on the emission of sulfur dioxide and nitrogen oxides in the atmospheric pollution is difficult.
Disclosure of Invention
The application provides a method for calculating the emission reduction amount of sulfur and nitrogen atmospheric pollutants of re-electrification, which is used for evaluating the emission reduction effect of related pollutants implemented by an electric energy replacement policy by calculating the amount of sulfides and nitrogen oxides in the emission of the atmospheric pollutants in a certain space range and in certain two time periods.
The technical scheme adopted by the application is as follows:
the invention provides a method for calculating the reduction of the emission of sulfur and nitrogen atmospheric pollutants of electrification, which is used for estimating the influence of electric energy substitution on the emission of sulfur dioxide and nitrogen oxides in the atmospheric pollutants by calculating the amount of sulfides and nitrogen oxides in the emission of the atmospheric pollutants in a certain space range and in certain two time periods, and comprises the following steps of:
s01: confirming two time periods needing to be compared and a calculated area;
s02: the electricity consumption and the fuel type in two time periods are counted: coal, oil, gas;
s03: the national standard of the emission concentration of sulfur dioxide and nitrogen oxide in two time periods is counted;
s04: counting the electricity consumption increasing amount and the fossil energy consumption reducing amount in a set calculation area in two time periods;
s05: confirming the average emission concentration of sulfur dioxide and nitrogen oxide of the power transmission and distribution loss of unit electricity consumption in two time periods;
s06: calculating the usage amount of fossil energy in different industries in two time periods;
s07: counting or estimating the average emission concentration of sulfur dioxide and nitrogen oxide generated by the fossil fuel energy power generation in the later time period of different industries in two time periods;
s08: counting or estimating the content of sulfur dioxide or nitrogen oxide discharged by power use according to different types of different energy sources or different types of energy source conversion power efficiency;
s09: according to the national standard and the actual measurement value of the current state of the atmospheric pollution emission of sulfur dioxide or nitrogen oxide, the emission of different projects in different industries in different periods is summed by using a calculation formula based on statistical data, and the reduction of the emission of sulfide and nitrogen oxide in the atmospheric pollutants substituted by electric energy is comprehensively calculated by combining parameters of direct and indirect utilization of power generation, power transmission, electricity utilization and fossil energy.
Further, after confirming the calculation period, giving the electricity consumption increasing amount and the fossil energy consumption reducing amount compared with each other in two periods, and calculating the amount of the fossil energy replaced by the electric energy to give the atmospheric pollution emission reducing amount, wherein the calculated atmospheric pollution emission reducing amount comprises the transmission and distribution loss caused by the power increment and the transportation and emission reduction of the fossil energy reducing amount.
Further, in the sulfur dioxide emission reduction amount and the nitrogen oxide emission reduction amount, the calculation of each emission reduction amount comprises the sum of the emission reduction amounts of fossil energy used in multiple industries, and the specific calculation is as follows:
Rsa＝Rsh+Rsf-Rsp (1)
RNa＝RNh+RNf-RNp (2)
wherein the letter R represents emission reduction amount, the first letter of the subscript represents emission reduction type: s and n are sulfur dioxide and nitrogen oxide respectively, and the second letter of the subscript represents the emission reduction field: a. h, f and p respectively represent the total emission reduction, the heat utilization field of output heat, the power field of input power and the power transmission and distribution price, and s and n respectively represent sulfur dioxide and nitrogen oxide.
Further, the reduction amount of the fossil energy due to the increase of the energy conversion power efficiency is considered in the calculation, and the fossil energy is defined as an equivalent reduction value, and the specific calculation formula is as follows:
Qcfi＝Qcbe-Qcaf-Qcbe×ηcbe÷ηcaf (3)
Qofi＝Qobe-Qoaf-Qobe×ηobe÷ηoaf (4)
Qgfi＝Qgbe-Qgaf-Qgbe×ηgbe÷ηgaf (5)
wherein Q represents fossil energy usage, the first subscript letters c, o and g represent coal, oil and gas respectively, the subsequent subscript letters fi, be and af represent the substitution result, the previous cycle usage and the subsequent cycle usage respectively, and eta represents fuel usage efficiency.
Further, the total dust emission reduction amount is calculated in a mode of combining actual measurement and theoretical calculation, actual measurement data are adopted at the emission points with the actual measurement data, and national standard emission limit values are adopted for calculation at the emission points without the actual measurement data; the coal, oil and gas using projects in the heat utilization are roughly divided according to the fuel type or the heat value and the construction time, and then three parameters in the calculation formula (1) are respectively evaluated as follows:
Rsh＝1000×∑i∑k(Vsik×Qikfi×Bik)-1000×α×Vsp×kp÷ηp÷Tp×∑i∑k(Qikfi×Tik×ηik) (6)
Rsf＝1000×∑i∑n(Vsin×Qinfi×Bin)-1000×α×Vsp×kp÷ηp÷Tp÷ηpt×∑i∑k(Qinfi×Tin×ηin) (7)
Rsp＝Vspbe×Ebe-Vspaf×Eaf (8)
wherein Rsh and Rsf are sulfur dioxide emission reduction in mg unit respectively by replacing with electric energy in the fields of heat and power use; i is the type of fuel used and is divided into three types of coal, oil and gas, and k is different types of output heat of the same type of fuel; vsik is the sulfur dioxide emission concentration in mg/m for type i fuel class k3(ii) a Qikfi is the class k equivalent weight reduction value for type i fuels, in t, with reference to equations (3) - (5); bik is the unit fuel smoke discharge amount of k types of i-th fuel, m3Per kg; tik is the calorific value of class k of type i fuels, in kJ/kg; η ik is the combustion output thermal efficiency of type i fuels, class k; alpha is the ratio of the fossil fuel energy thermal power generation mode in the following period; eta p is the average power generation efficiency of the fossil-fired energy power generation mode of the following period; tp is the average calorific value of the fossil energy used in the following cycle, in kJ/kg; kp is the average unit fuel smoke discharge amount m of the fossil-fired energy power generation in the next time period3Per kg; vsp is the average emission concentration of sulfur dioxide in mg/m in the power generation of the fossil fuel energy source in the next time period3；
n represents different types of output heat of the same type of fuel used as power output; vsin is the sulphur dioxide content in mg/m of power usage emissions for the nth case of type i fuel3(ii) a Qinfi is the nth case equivalent weight loss value for type i fuel, in t, with reference to equations (3) - (5); bin is the unit fuel smoke discharge amount of the nth case of the i-th type fuel, m3Per kg; tin is the heating value of the nth case of the i-th type fuelkJ; eta in is the power efficiency of the nth condition of the ith fuel by using energy conversion; η pt is the average efficiency of converting electricity into power;
vspbe and Vspaf are the sulfur dioxide average emission concentration (sulfur dioxide emission concentration of unit power generation amount of a power plant) of the power transmission and distribution loss of unit power consumption in two periods before and after, and the unit mg/kW.h is respectively; ebe and Eaf are the power consumptions of the front and the back two periods respectively, and the unit is kW.h.
Further, the three parameters of the calculation formula (2) are evaluated as:
RNh＝1000×∑i∑k(VNik×Qikfi×Bik)-1000×α×VNp×kp÷ηp÷Tp×∑i∑k(Qikfi×Tik×ηik) (9)
RNf＝1000×∑i∑n(VNin×Qinfi×Bin)-1000×α×VNp×kp÷ηp÷Tp÷ηpt×∑i∑k(Qinfi×Tin×ηin) (10)
RNp＝VNpbe×Ebe-VNpaf×Eaf (11)
wherein, RNh and RNf are respectively nitrogen oxide emission reduction quantity in mg unit which is replaced by electric energy in the fields of heat and power use; VNik is the nitrogen oxide emission concentration of type i fuel in k, mg/m3(ii) a Vnp is the average nitrogen oxide emission concentration in mg/m of the fossil fuel energy power generation in the next time period3；
VNin is the content of nitrogen oxides, mg/m, emitted by the power usage of the nth case of type i fuel3(ii) a VNpbe and VNpaf are the average emission concentration of nitrogen oxides (emission concentration of nitrogen oxides of unit power generation amount of the power plant) of the power transmission and distribution loss of unit power consumption in two periods before and after (unit mg/kW.h).
The technical scheme of the application has the following beneficial effects:
according to the method for calculating the emission reduction amount of the sulfur and nitrogen atmospheric pollutants for electrification again, the emission reduction effect of comparison of two periods can be calculated, the relevant benefits of electric energy replacement policy implementation on the environment are quantized, and the sulfur and nitrogen emission reduction effect of national electric energy replacement is more accurately evaluated.
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In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram illustrating classification of sulfur and nitrogen emission reduction by a method for calculating the emission reduction amount of sulfur and nitrogen atmospheric pollutants of a re-electrification system according to an embodiment of the invention;
FIG. 2 is a schematic diagram of a sulfur dioxide emission reduction calculation of a re-electrified sulfur-nitrogen atmospheric pollutant emission reduction calculation method according to an embodiment of the invention;
fig. 3 is a schematic view of nitrogen oxide emission reduction calculation of a re-electrified sulfur-nitrogen atmospheric pollutant emission reduction calculation method according to an embodiment of the invention.
Detailed Description
Reference will now be made in detail to embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following examples do not represent all embodiments consistent with the present application. But merely as exemplifications of systems and methods consistent with certain aspects of the application, as recited in the claims.
A new calculation method is provided, so that the emission reduction value can be estimated accurately, and data reference is provided for implementing electric energy substitution.
The electric energy substitution mainly means that the electric energy is used for substituting energy supply of fire coal, fuel oil and fuel gas, and the coal, the fuel oil and the fuel gas are used as raw materials for producing other products. Therefore, the calculation of the emission amount of sulfur dioxide and nitrogen oxide in the current atmospheric pollution emission mainly involves two modes of output heat and output power of fire coal, fuel oil and fuel gas, meanwhile, the statistics of the electric power transmission efficiency in the comparison period and the equivalent emission consumed by the electric power transmission efficiency are carried out for more accurate calculation, and specifically, as shown in fig. 2 and 3, the emission amount of sulfur dioxide and nitrogen oxide is divided into three intervals for calculation.
And then, carrying out decomposition calculation on the emission amount of each interval, and counting the energy consumption reduction and emission reduction caused by efficiency improvement in a mode of reducing the emission amount by equivalent. Wherein, the former cycle of the following two time periods is before the electric energy replacement, and the latter cycle is after the electric energy replacement.
The method for calculating the reduction of the sulfur and nitrogen atmospheric pollutants for electrification, as shown in fig. 1, is used for estimating the influence of electric energy substitution on the emission of sulfur dioxide and nitrogen oxides in the atmospheric pollutants by calculating the amount of sulfides and nitrogen oxides in the emission of the atmospheric pollutants in a certain space range for certain two time periods, and comprises the following steps of:
s01: confirming two time periods before and after needing comparison and a calculated area;
s02: counting electricity consumption Ebe and Eaf and fuel type i in two time periods before and after:
s03: carrying out statistics on national standards of the emission concentrations of sulfur dioxide and nitrogen oxide in two time periods before and after;
s04: counting the electricity consumption increment and the fossil energy consumption decrement in a set calculation area in two time periods before and after;
s05: confirming average emission concentrations Vspbe and Vspaf of sulfur dioxide and average emission concentrations VNpbe and VNpaf of nitrogen oxides of power transmission and distribution losses of unit electricity consumption of two time periods before and after;
s06: counting the fossil energy consumption Q of different industries in two time periods before and after;
s07: counting average emission concentrations Vsp and Vnp of sulfur dioxide or nitrogen oxide generated by the fossil energy source in the next time period of different industries in the previous and next two time periods, or estimating the average emission concentration of the sulfur dioxide or nitrogen oxide generated by the fossil energy source in the next time period according to national standards of the emission concentrations of the sulfur dioxide and the nitrogen oxide;
s08: counting or estimating the energy conversion power efficiency and the content of sulfur dioxide or nitrogen oxide discharged by power use according to different types of different energy sources or different types (such as different coal types, different oils, different gas types and the like), wherein the energy conversion power efficiency is specifically as follows: the conversion efficiency of the used energy in the nth case of the i-th fuel is recorded as eta in, and the content of sulfur dioxide or nitrogen oxide discharged by power use is specifically as follows: the power usage emissions of the nth instance of type i fuel, Vsin, and of the nth instance of type i fuel, VNin;
s09: combining the steps, summing the emission of different projects in different industries in different periods by using a calculation formula based on statistical data through the current national standard and actual measurement value of the emission of the atmospheric pollutants of sulfur dioxide or nitrogen oxide, and comprehensively calculating the emission reduction amount of sulfide and nitrogen oxide in the atmospheric pollutants substituted by electric energy by combining parameters of direct and indirect utilization of power generation, power transmission, electricity utilization and fossil energy.
The specific calculation method is as follows:
and after confirming the calculation period, giving the electricity consumption increasing amount and the fossil energy consumption reducing amount compared with each other in two periods, and calculating the amount of the fossil energy replaced by the electric energy to give the atmospheric pollution emission reducing amount, wherein the calculated atmospheric pollution emission reducing amount comprises the transmission and distribution loss caused by the electricity increment and the transportation and emission reduction of the fossil energy reducing amount.
In this embodiment, the sulfur and nitrogen oxide reduction is calculated as follows:
in the sulfur dioxide emission reduction amount and the nitrogen oxide emission reduction amount, the calculation of each emission reduction amount comprises the sum of the emission reduction amounts of fossil energy used in multiple industries, and the specific calculation is as follows:
Rsa＝Rsh+Rsf-Rsp (1)
RNa＝RNh+RNf-RNp (2)
wherein the letter R represents emission reduction amount, the first letter of the subscript represents emission reduction type: s and n are sulfur dioxide and nitrogen oxide respectively, and the second letter of the subscript represents the emission reduction field: a. h, f and p respectively represent the total emission reduction, the heat utilization field of output heat, the power field of input power and the power transmission and distribution price, and s and n respectively represent sulfur dioxide and nitrogen oxide.
In this embodiment, the amount of fossil energy replaced by electric energy is calculated as follows:
the reduction amount of the fossil energy, which is caused by the improvement of the energy conversion power efficiency, is considered during calculation, and is defined as the equivalent reduction value of the fossil energy, and the specific calculation formula is as follows:
Qcfi＝Qcbe-Qcaf-Qcbe×ηcbe÷ηcaf (3)
Qofi＝Qobe-Qoaf-Qobe×ηobe÷ηoaf (4)
Qgfi＝Qgbe-Qgaf-Qgbe×ηgbe÷ηgaf (5)
wherein Q represents fossil energy usage, the first subscript letters c, o and g represent coal, oil and gas respectively, the subsequent subscript letters fi, be and af represent the substitution result, the previous cycle usage and the subsequent cycle usage respectively, and eta represents fuel usage efficiency.
In the embodiment, the calculation process of the sulfur dioxide reduction amount RSA is as follows:
calculating the total dust emission reduction capacity by a mode of combining actual measurement and theoretical calculation, wherein actual measurement data (mainly a power plant) is adopted at a discharge point with the actual measurement data, and national standard discharge limit values are adopted for calculating at a discharge point without the actual measurement data; the coal, oil and gas using projects in the heat utilization are roughly divided according to the fuel type or the heat value and the construction time, and then three parameters in the calculation formula (1) are respectively evaluated as follows:
Rsh＝1000×∑i∑k(Vsik×Qikfi×Bik)-1000×α×Vsp×kp÷ηp÷Tp×∑i∑k(Qikfi×Tik×ηik) (6)
Rsf＝1000×∑i∑n(Vsin×Qinfi×Bin)-1000×α×Vsp×kp÷ηp÷Tp÷ηpt×∑i∑k(Qinfi×Tin×ηin) (7)
Rsp＝Vspbe×Ebe-Vspaf×Eaf (8)
wherein Rsh and Rsf are sulfur dioxide emission reduction in mg unit respectively by replacing with electric energy in the fields of heat and power use; i is coal, oil and gas, k is different kinds of output heat of the same type of fuelClass; vsik is the sulfur dioxide emission concentration in mg/m for type i fuel class k3(ii) a Qikfi is the class k equivalent weight reduction value for type i fuels, in t, with reference to equations (3) - (5); bik is the unit fuel smoke discharge amount of k types of i-th fuel, m3Per kg; tik is the calorific value of class k of type i fuels, in kJ/kg; η ik is the combustion output thermal efficiency of type i fuels, class k; alpha is the ratio of the fossil fuel energy thermal power generation mode in the following period; eta p is the average power generation efficiency of the fossil-fired energy power generation mode of the following period; tp is the average calorific value of the fossil energy used in the following cycle, in kJ/kg; kp is the average unit fuel smoke discharge amount m of the fossil-fired energy power generation in the next time period3Per kg; vsp is the average emission concentration of sulfur dioxide in mg/m in the power generation of the fossil fuel energy source in the next time period3；
n represents different types of output heat of the same type of fuel used as power output; vsin is the sulphur dioxide content in mg/m of power usage emissions for the nth case of type i fuel3(ii) a Qinfi is the nth case equivalent weight loss value for type i fuel, in t, with reference to equations (3) - (5); bin is the unit fuel smoke discharge amount of the nth case of the i-th type fuel, m3Per kg; tin is the heating value of the nth case of type i fuel, kJ; eta in is the power efficiency of the nth condition of the ith fuel by using energy conversion; η pt is the average efficiency of converting electricity into power;
vspbe and Vspaf are the sulfur dioxide average emission concentration (sulfur dioxide emission concentration of unit power generation amount of a power plant) of the power transmission and distribution loss of unit power consumption in two periods before and after, and the unit mg/kW.h is respectively; ebe and Eaf are the power consumptions of the front and the back two periods respectively, and the unit is kW.h.
In this embodiment, the calculation process of the nitrogen oxide reduction amount RNh is basically the same as the calculation process of the sulfur dioxide reduction amount RSA, and the three parameters of the calculation formula (2) are respectively evaluated as:
RNh＝1000×∑i∑k(VNik×Qikfi×Bik)-1000×α×VNp×kp÷ηp÷Tp×∑i∑k(Qikfi×Tik×ηik) (9)
RNf＝1000×∑i∑n(VNin×Qinfi×Bin)-1000×α×VNp×kp÷ηp÷Tp÷ηpt×∑i∑k(Qinfi×Tin×ηin) (10)
RNp＝VNpbe×Ebe-VNpaf×Eaf (11)
wherein, RNh and RNf are respectively nitrogen oxide emission reduction quantity in mg unit which is replaced by electric energy in the fields of heat and power use; VNik is the nitrogen oxide emission concentration of type i fuel in k, mg/m3(ii) a Vnp is the average nitrogen oxide emission concentration in mg/m of the fossil fuel energy power generation in the next time period3；
VNin is the content of nitrogen oxides, mg/m, emitted by the power usage of the nth case of type i fuel3(ii) a VNpbe and VNpaf are the average emission concentration of nitrogen oxides (emission concentration of nitrogen oxides of unit power generation amount of the power plant) of the power transmission and distribution loss of unit power consumption in two periods before and after (unit mg/kW.h).
According to the invention, through decomposition analysis, equivalent discharge amount of sulfide and nitrogen oxide replaced by electric energy is calculated, emission reduction amount is given, and relevant environmental protection effect and income after electric energy replacement policy is implemented are evaluated. The method mainly comprises three types of calculation of the emission of output thermal combustion, the emission of output power combustion and the emission of electric energy transmission loss.
Through a given specific calculation formula, the method can calculate the emission reduction effect compared between two periods, quantize the relevant benefits of the implementation of the electric energy substitution policy on the environment, more accurately evaluate the sulfur and nitrogen emission reduction effect of national electric energy substitution, and provide reference for further deepening popularization and perfecting of the policy.
The embodiments provided in the present application are only a few examples of the general concept of the present application, and do not limit the scope of the present application. Any other embodiments extended according to the scheme of the present application without inventive efforts will be within the scope of protection of the present application for a person skilled in the art.

Claims (6)

1. A method for calculating the reduction of the emission of sulfur and nitrogen atmospheric pollutants of re-electrification is characterized in that the method is used for estimating the influence of electric energy substitution on the emission of sulfur dioxide and nitrogen oxides in the atmospheric pollutants by calculating the amount of sulfides and nitrogen oxides in the emission of the atmospheric pollutants for two time periods in a certain space range and comprises the following steps:
s01: confirming two time periods needing to be compared and a calculated area;
s02: the electricity consumption and the fuel type in two time periods are counted: coal, oil, gas;
s03: the national standard of the emission concentration of sulfur dioxide and nitrogen oxide in two time periods is counted;
s04: counting the electricity consumption increasing amount and the fossil energy consumption reducing amount in a set calculation area in two time periods;
s05: confirming the average emission concentration of sulfur dioxide and nitrogen oxide of the power transmission and distribution loss of unit electricity consumption in two time periods;
s06: calculating the usage amount of fossil energy in different industries in two time periods;
s07: counting or estimating the average emission concentration of sulfur dioxide and nitrogen oxide generated by the fossil fuel energy power generation in the later time period of different industries in two time periods;
s08: counting or estimating the content of sulfur dioxide or nitrogen oxide discharged by power use according to different types of different energy sources or different types of energy source conversion power efficiency;
s09: according to the national standard and the actual measurement value of the current state of the atmospheric pollution emission of sulfur dioxide or nitrogen oxide, the emission of different projects in different industries in different periods is summed by using a calculation formula based on statistical data, and the reduction of the emission of sulfide and nitrogen oxide in the atmospheric pollutants substituted by electric energy is comprehensively calculated by combining parameters of direct and indirect utilization of power generation, power transmission, electricity utilization and fossil energy.
2. The method for calculating the reduction of sulfur and nitrogen atmospheric pollutants of re-electrification according to claim 1, wherein after the calculation period is confirmed, the electricity consumption increasing amount and the consumption of fossil energy are compared in two periods, the reduction of the atmospheric pollution emission is calculated by replacing the fossil energy with electric energy, and the calculated reduction of the atmospheric pollution emission comprises the transmission and distribution power loss caused by the increase of the electricity and the transportation reduction of the fossil energy.
3. The method for calculating the reduction amount of sulfur and nitrogen atmospheric pollutants on the electrified surface as claimed in claim 2, wherein the calculation of each reduction amount of sulfur dioxide and nitrogen oxide comprises the sum of the reduction amounts of fossil energy used in multiple industries, and the specific calculation is as follows:
Rsa＝Rsh+Rsf-Rsp (1)
RNa＝RNh+RNf-RNp (2)
wherein the letter R represents emission reduction amount, the first letter of the subscript represents emission reduction type: s and n are sulfur dioxide and nitrogen oxide respectively, and the second letter of the subscript represents the emission reduction field: a. h, f and p respectively represent the total emission reduction, the heat utilization field of output heat, the power field of input power and the power transmission and distribution price, and s and n respectively represent sulfur dioxide and nitrogen oxide.
4. The method for calculating the reduction amount of sulfur and nitrogen atmospheric pollutants in electrified state of claim 3, wherein the reduction amount of fossil energy due to the increase of power efficiency of energy conversion to self consumption is considered in the calculation, and is defined as that the fossil energy is an equivalent reduction value, and the specific calculation formula is as follows:
Qcfi＝Qcbe-Qcaf-Qcbe×ηcbe÷ηcaf (3)
Qofi＝Qobe-Qoaf-Qobe×ηobe÷ηoaf (4)
Qgfi＝Qgbe-Qgaf-Qgbe×ηgbe÷ηgaf (5)
wherein Q represents fossil energy usage, the first subscript letters c, o and g represent coal, oil and gas respectively, the subsequent subscript letters fi, be and af represent the substitution result, the previous cycle usage and the subsequent cycle usage respectively, and eta represents fuel usage efficiency.
5. The method for calculating the reduced discharge capacity of the electrified sulfur-nitrogen atmospheric pollutants as claimed in claim 4, wherein the total reduced discharge capacity of the dust is calculated by combining actual measurement and theoretical calculation, actual measurement data is adopted at a discharge point with actual measurement data, and national standard discharge limit values are adopted at a discharge point without the actual measurement data for calculation; the coal, oil and gas using projects in the heat utilization are roughly divided according to the fuel type or the heat value and the construction time, and then three parameters in the calculation formula (1) are respectively evaluated as follows:
Rsh＝1000×∑i∑k(Vsik×Qikfi×Bik)-1000×α×Vsp×kp÷ηp÷Tp×∑i∑k(Qikfi×Tik×ηik) (6)
Rsf＝1000×∑i∑n(Vsin×Qinfi×Bin)-1000×α×Vsp×kp÷ηp÷Tp÷ηpt×∑i∑k(Qinfi×Tin×ηin) (7)
Rsp＝Vspbe×Ebe-Vspaf×Eaf (8)
wherein Rsh and Rsf are sulfur dioxide emission reduction in mg unit respectively by replacing with electric energy in the fields of heat and power use; i is the type of fuel used and is divided into three types of coal, oil and gas, and k is different types of output heat of the same type of fuel; vsik is the sulfur dioxide emission concentration in mg/m for type i fuel class k3(ii) a Qikfi is the class k equivalent weight reduction value for type i fuels, in t, with reference to equations (3) - (5); bik is the unit fuel smoke discharge amount of k types of i-th fuel, m3Per kg; tik is the calorific value of class k of type i fuels, in kJ/kg; η ik is the combustion output thermal efficiency of type i fuels, class k; alpha is the ratio of the fossil fuel energy thermal power generation mode in the following period; eta p is the average power generation efficiency of the fossil-fired energy power generation mode of the following period; tp is the average calorific value of the fossil energy used in the following cycle, in kJ/kg; kp is the average unit fuel smoke discharge amount m of the fossil-fired energy power generation in the next time period3Per kg; vsp is the average emission concentration of sulfur dioxide in mg/m in the power generation of the fossil fuel energy source in the next time period3；
n represents the heat output of the same type of fuel used as power outputThe same kind; vsin is the sulphur dioxide content in mg/m of power usage emissions for the nth case of type i fuel3(ii) a Qinfi is the nth case equivalent weight loss value for type i fuel, in t, with reference to equations (3) - (5); bin is the unit fuel smoke discharge amount of the nth case of the i-th type fuel, m3Per kg; tin is the heating value of the nth case of type i fuel, kJ; eta in is the power efficiency of the nth condition of the ith fuel by using energy conversion; η pt is the average efficiency of converting electricity into power;
vspbe and Vspaf are the average emission concentration of sulfur dioxide of power transmission and distribution loss of unit power consumption in two periods before and after, and the unit mg/kW.h is respectively; ebe and Eaf are the power consumptions of the front and the back two periods respectively, and the unit is kW.h.
6. The method for calculating the reduction of sulfur and nitrogen atmospheric pollutants of re-electrification according to claim 5, wherein the three parameters of the calculation formula (2) are respectively evaluated as follows:
RNh＝1000×∑i∑k(VNik×Qikfi×Bik)-1000×α×VNp×kp÷ηp÷Tp×∑i∑k(Qikfi×Tik×ηik) (9)
RNf＝1000×∑i∑n(VNin×Qinfi×Bin)-1000×α×VNp×kp÷ηp÷Tp÷ηpt×∑i∑k(Qinfi×Tin×ηin) (10)
RNp＝VNpbe×Ebe-VNpaf×Eaf (11)
wherein, RNh and RNf are respectively nitrogen oxide emission reduction quantity in mg unit which is replaced by electric energy in the fields of heat and power use; VNik is the nitrogen oxide emission concentration of type i fuel in k, mg/m3(ii) a Vnp is the average nitrogen oxide emission concentration in mg/m of the fossil fuel energy power generation in the next time period3；
VNin is the content of nitrogen oxides, mg/m, emitted by the power usage of the nth case of type i fuel3(ii) a VNpbe and VNpaf are the average emission concentration of nitrogen oxides in unit mg/kW.h of power transmission and distribution loss of unit power consumption in two periods before and after.
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