CN109872079A - Coal-fired thermal power system environments impact evaluation method based on evaluation of life cycle - Google Patents
Coal-fired thermal power system environments impact evaluation method based on evaluation of life cycle Download PDFInfo
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- 238000011156 evaluation Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 23
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- 239000003344 environmental pollutant Substances 0.000 claims description 46
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- 230000007613 environmental effect Effects 0.000 claims description 15
- 238000010792 warming Methods 0.000 claims description 13
- 239000000428 dust Substances 0.000 claims description 12
- 239000003500 flue dust Substances 0.000 claims description 12
- 238000012851 eutrophication Methods 0.000 claims description 10
- 230000020477 pH reduction Effects 0.000 claims description 9
- 239000002910 solid waste Substances 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 229910052602 gypsum Inorganic materials 0.000 claims description 5
- 239000010440 gypsum Substances 0.000 claims description 5
- 239000003415 peat Substances 0.000 claims description 5
- 239000002574 poison Substances 0.000 claims description 5
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Abstract
The present invention discloses a kind of coal-fired thermal power system environments impact evaluation method based on evaluation of life cycle, this method comprises: S1, coal fired power generation listings data, device fabrication listings data according to China Life cycle basis database and investigation, obtain the Life Cycle Inventory of cogenerated products in coal-fired thermal power system；S2, the Life Cycle Inventory according to cogenerated products, the environment for calculating coal-fired thermal power system influence load；S3, load is influenced according to the environment of coal-fired thermal power system, the influence grade according to the assessment models J assessment coal-fired thermal power system pre-established to environment.The above method can intuitively indicate the size of coal-fired thermal power system effect on environment using a quantitative index.
Description
Technical field
The invention belongs to cogeneration of heat and power and environmental science more particularly to a kind of coal fuel heatings based on evaluation of life cycle
Electric system environment impact assessment method.
Background technique
Important component of the cogeneration of heat and power as ten big energy conservation measures and power industry, compared to heating boiler and tradition
Boiler of power plant has many advantages, such as that cold source energy is small, the method for operation is flexible, step energy can be achieved, and has obtained quick hair in recent years
Exhibition.But fire coal causes the environmental problem got worse, such as atmosphere pollution, water pollution and solid waste.
The environment of coal-fired thermal power system influence to refer to coal-fired thermal power system to the effect of environment and caused environmental change with
And it is thus caused to human society and economic effect.Most typical environment influences to include global warming, acidification, eutrophy
Change, human health murder by poisoning and flue dust dust etc..
Therefore, it is very necessary for establishing a kind of environment impact assessment method of coal-fired thermal power system.
Summary of the invention
The coal-fired thermal power system environments impact evaluation method based on evaluation of life cycle that the object of the present invention is to provide a kind of,
And then the size of coal-fired thermal power system effect on environment can be intuitively indicated in effect on environment using a quantitative index.
To achieve the above object, the main technical schemes that the present invention uses include:
The present invention provides a kind of coal-fired thermal power system environments impact evaluation method based on evaluation of life cycle, comprising:
S1, coal fired power generation listings data, device fabrication inventory number according to China Life cycle basis database and investigation
According to/steel emissions data is produced, obtain the Life Cycle Inventory of cogenerated products in coal-fired thermal power system；
S2, the Life Cycle Inventory according to cogenerated products, the environment for calculating coal-fired thermal power system influence load；
S3, load is influenced according to the environment of the coal-fired thermal power system, is assessed according to the assessment models J pre-established coal-fired
Influence grade of the heat and power system to environment.
Optionally, the step S2 includes:
S21, arrangement is analyzed and is grouped according to the information in cogenerated products Life Cycle Inventory, and cogenerated products are raw
The environment that data in life period inventory are divided into different groups influences in type；
S22, type is influenced for every group of environment, the environment is selected to influence one of type pollutant as referring to pollution
Object, obtaining the environment influences the equivalent coefficient of other pollutants in type, and the equivalent coefficient referring to pollutant is 1；
S23, all contaminants in every group of environment influence type are converted according to equivalent coefficient, and summarized, obtained every
Group environment influences the latent value of influence of type；
S24, the latent value of the influence that type is influenced on every group of environment are standardized, and influence type according to each group environment
Weight be weighted processing, obtaining total weighting environment in cogenerated products life cycle influences the latent value of type；
S25, the weighting environment of all groups of environmental forms is influenced to the latent value addition of type, obtaining total environment influences load.
Optionally, it includes following one or more that environment in step S21, which influences type: global warming type, acidification
Type, eutrophication type, human health poison type, solid waste type and flue dust dust type；
In step S22, reference pollutant is CO in global warming type2, pollutant includes following one or more:
CH4、CO、N2O and CO2；
Reference pollutant is SO in acidification type2, pollutant includes following one or more: NOx、H2S, HCL and SO2；
Reference pollutant is NO in eutrophication type3, pollutant includes following one or more: NOx、COD、BOD、
SS, N, P and NO3；
It is SW that human health, which is poisoned in type referring to pollutant, and pollutant includes following one or more: ASH,
GYPSUM, PEAT and SW；
It referring to pollutant is TSP in flue dust dust type, pollutant includes following one or more: SA and TSP.
Optionally, in step S23, using formula one, obtaining every group of environment influences the latent value EI of influence of typeP(n)；
EIP(n)=∑mEIP(n)m=∑mMm×EIf(n)mFormula one；
Wherein, m indicates m kind pollutant；N indicates that environment influences type in n-th；EIPFor cogenerated products life cycle ring
Border influences latent value, EIfFor the equivalent coefficient of cogenerated products life cycle pollutant；M is that environment is dirty in cogenerated products life cycle
The discharge amount of object is contaminated, unit is kilogram.
Optionally, in step s 25, it is carried out obtaining total environment influence load EI according to formula twoIL；
EIIL=∑ WIp(n)=∑ (NEP (n) × WIf(n)) formula two
Wherein, NEP (n) is that the total weighting environment obtained in step S24 influences the latent value of type；
EIr (n) 90 is that various environment influence the environmental influence value a reference values of types per capita for nineteen ninety China；NEP (n) is indicated
The standardized environment that cogenerated products life cycle n environment influences type influences latent value；WIfIt (n) is cogenerated products Life Cycle
Phase n environment influences the corresponding weight coefficient of type；WIpIt (n) is that cogenerated products life cycle n environment influences type
Weight environmental influence value.
Optionally, step S3 includes:
The assessment models J pre-established are as follows:
Optionally, it is influenced in type in the environment of global warming, CO2Standardized benchmark be 8700kg/year, weight system
Number is 0.2；
NO in type is influenced in the environment of acidificationxStandardized benchmark be 36kg/year, weight coefficient 0.036；
NO in type is influenced in the environment of eutrophicationxStandardized benchmark be 62kg/year, weight coefficient 0.13；
It is influenced in type in the environment that human health is poisoned, NOxStandardized benchmark be 9100kg/year, weight coefficient
It is 0.085；
It is influenced in type in the environment of solid waste, the standardized benchmark of SW is 251kg/year, weight coefficient is
0.026；
It is influenced in type in the environment of flue dust dust, the standardized benchmark of TSP is 18kg/year, weight coefficient is
0.054。
Optionally, CO in the pollutant of global warming type2Equivalent coefficient is 1；CH4Equivalent coefficient is 25；CO equivalent coefficient
It is 2；N2O equivalent coefficient is 320；
NO in the pollutant of acidification typexEquivalent coefficient is 0.7；SO2Equivalent coefficient is 1；H2S equivalent coefficient is 1.88；
HCL equivalent coefficient is 0.88；
NO in the pollutant of eutrophication typexEquivalent coefficient is 1.35；NO3Equivalent coefficient is 1；COD equivalent coefficient is
0.23；BOD equivalent coefficient is 1.79；SS equivalent coefficient is 0.85；N equivalent coefficient is 4.43；P equivalent coefficient is 32；
It is 1 that human health, which poisons SW equivalent coefficient in type,；ASH equivalent coefficient is 1；GYPSUM equivalent coefficient is 1；PEAT
Equivalent coefficient is 1；
TSP equivalent coefficient is 1 in flue dust dust type；SA equivalent coefficient is 1.
The beneficial effects of the present invention are:
Method of the invention compared with prior art, can intuitively describe heat and power system by a specific numerical value
Environment influence.
In addition, in environmental assessment model of the invention, it is contemplated that exploitation, washing, transport and the device fabrication of coal
Journey is influenced caused by environment, so that final assessment result is more accurate, comprehensive.
Further, in the implementation, the present invention allows J value in model to embody fire coal by the normalized of data
Environment caused by heat and power system influences grade, provides reference to the management and optimization of equipment.
Detailed description of the invention
Fig. 1 is the flow chart of the coal-fired thermal power system environments impact evaluation method of the invention based on evaluation of life cycle.
Specific embodiment
In order to better explain the present invention, in order to understand, with reference to the accompanying drawing, by specific embodiment, to this hair
It is bright to be described in detail.
Present invention implementation is achieved in that a kind of coal-fired thermal power system environments impact evaluation based on evaluation of life cycle
Method the described method comprises the following steps:
Step 1: cogenerated products life cycle inventory analysis results, concrete analysis include:
Cogenerated products life cycle inventory analysis results be for cogenerated products life cycle phase resource input carry out it is objective
The process of quantization, it is necessary first to collect listings data.Tables 1 and 2 described as follows enumerates.
Influence of the heat and power system to environment mainly includes indirect influence and directly affects two parts: influencing to include coal indirectly
Exploitation, washing and transport, be referred to as upstream process；It directly affects and is divided into two parts, one is by device fabrication, construction and dimension
Environment caused by shield influences, and another part is that environment caused by coal fired power generation production process influences, such as boiler exhaust gas, blowdown
Deng.Wherein upstream process listings data comes from China Life cycle basis database, with being averaged for coal mining and carrier
It is horizontal related；Coal fired power generation listings data is investigated to obtain by specific enterprise；It, can about the listings data in equipment Manufacture Process
Equipment steel content is calculated by equipment operating parameter, by producing steel emissions data come alternate device Bill of manufacturing data.
Step 2: environmental impact assessment and explanation.
Cogenerated products Life Cycle Impact Assessment is exactly all kinds of rings caused by calculating cogenerated products according to inventory analysis data
Border influences latent value, including three steps: classification, characterization, standardization and standardization.
Sub-step one: classification is exactly that cogenerated products life cycle inventory analysis results data are grouped arrangement, is divided into not
Same environment influences in type.
The present embodiment, which chooses six kinds of main environment, influences type, respectively global warming, acidification, eutrophication, human body
Health murder by poisoning, solid waste and flue dust dust.Every kind of environment influences type and all chooses a kind of pollutant as referring to polluting
Object, in the case where the environment influences type, its equivalent coefficient is 1, and the equivalent coefficient of other pollutants passes through the comparison with reference pollutant
It determines.Such as CO2The reference pollutant in type is influenced as global warming environment, equivalent coefficient 1, CO is under this type
Equivalent coefficient is 2, then it represents that global warming effect caused by 1 kilogram of CO of discharge is equal to 2 kilograms of CO of discharge2The whole world of generation becomes
Warm effect.As shown in table 3.
Optionally, CO in the pollutant of global warming type2Equivalent coefficient is 1；CH4Equivalent coefficient is 25；CO equivalent coefficient
It is 2；N2O equivalent coefficient is 320；
NO in the pollutant of acidification typexEquivalent coefficient is 0.7；SO2Equivalent coefficient is 1；H2S equivalent coefficient is 1.88；
HCL equivalent coefficient is 0.88；
NO in the pollutant of eutrophication typexEquivalent coefficient is 1.35；NO3Equivalent coefficient is 1；COD equivalent coefficient is
0.23；BOD equivalent coefficient is 1.79；SS equivalent coefficient is 0.85；N equivalent coefficient is 4.43；P equivalent coefficient is 32；
It is 1 that human health, which poisons SW equivalent coefficient in type,；ASH equivalent coefficient is 1；GYPSUM equivalent coefficient is 1；PEAT
Equivalent coefficient is 1；
TSP equivalent coefficient is 1 in flue dust dust type；SA equivalent coefficient is 1.
Sub-step two: after completing classification, followed by characterization, the purpose is to determine the mode measuring environment and influencing,
Each is influenced into pollutant different in classification according to equivalent coefficient conversion and is aggregated into Unified Element, to calculate the type
Total environment influence latent value.It is shown below:
Wherein, m indicates m kind pollutant；N indicates that environment influences type in n-th；EIPFor cogenerated products life cycle ring
Border influence value, EIfFor the equivalent coefficient of cogenerated products life cycle pollutant；M is cogenerated products life cycle environment pollution
The discharge amount of object, unit are kilogram.
Sub-step three: it after obtaining all types of latent value of environment influence of cogenerated products life cycle, needs to various environment shadows
The size that ringing type influences contribution to overall environment carries out dimensionless comparison, and the weight of type is influenced according to various environment, into
One step handles data, to illustrate the size of cogenerated products life cycle each unit environment influence, it is therefore desirable to all kinds of
The environment of type influences latent value and is standardized, and then weighting is handled, while obtaining total weighting environment of cogenerated products life cycle
Influence the latent value of type.Standardized method is as follows:
Wherein, EIr (n) 90 is that various environment influence the environmental influence value a reference values of types per capita for nineteen ninety China；NEP
(n) indicate that cogenerated products life cycle n environment influences the latent value of standardized environment influence of type.
Since various environment influence type to the extent of injury difference of environment, each type of environment is influenced into latent value
Latent value is influenced to obtain the standardized environment of the type multiplied by corresponding weight coefficient, is expressed as equivalent per capita, unit PE.
The weighted calculation that the standardized environment of cogenerated products influences latent value is as follows:
WIP(n)=NEP (n) × WIf(n)
Wherein, WIfIt (n) is that cogenerated products life cycle n environment influences the corresponding weight coefficient of type；WIp(n) it is
The weighting environmental influence value of cogenerated products life cycle n environment influence type.
Optionally, it is influenced in type in the environment of global warming, CO2Standardized benchmark be 8700kg/year, weight system
Number is 0.2；
NO in type is influenced in the environment of acidificationxStandardized benchmark be 36kg/year, weight coefficient 0.036；
NO in type is influenced in the environment of eutrophicationxStandardized benchmark be 62kg/year, weight coefficient 0.13；
It is influenced in type in the environment that human health is poisoned, NOxStandardized benchmark be 9100kg/year, weight coefficient
It is 0.085；
It is influenced in type in the environment of solid waste, the standardized benchmark of SW is 251kg/year, weight coefficient is
0.026；
It is influenced in type in the environment of flue dust dust, the standardized benchmark of TSP is 18kg/year, weight coefficient is
0.054。
Sub-step four: finally, the weighting environment that each environment influences type is influenced latent value addition to get total environment shadow is arrived
Ring load EIIL:
EIIL=∑ WIp(n)
Step 3: the EI being calculated according to above-mentioned stepsIL, assess influence grade J of the heat and power system to environment, it may be assumed that
Influence grade of the heat and power system to environment is determined according to the practical numerical value calculated of assessment models J.
The method of the present embodiment compared with prior art, can intuitively describe thermoelectricity system by a specific numerical value
The influence of the environment of system.
In addition, in environmental assessment model of the invention, it is contemplated that exploitation, washing, transport and the device fabrication of coal
Journey is influenced caused by environment, so that final assessment result is more accurate, comprehensive.
Further, in the implementation, the present invention allows J value in model to embody fire coal by the normalized of data
Environment caused by heat and power system influences grade, provides reference to the management and optimization of equipment.
1 cogenerated products life cycle upstream process of table and coal fired power generation listings data (kg/s)
2 China of table produces steel emissions data g/kg steel
3 Environmental Factors of table, equivalent coefficient, benchmark and weight
Coal-fired thermal power system is stated each process in the period by the method for the embodiment of the present invention, from coal mining washing, is set
Standby build is maintained into the specific value amount of progress of the influence agreement to environment of various pollutants caused by the processes such as coal fired power generation
Changing and assessing it influences grade, its biggest advantage is that intuitively, it is easy, there is specific directive significance to concrete practice.
It is to be appreciated that describing the skill simply to illustrate that of the invention to what specific embodiments of the present invention carried out above
Art route and feature, its object is to allow those skilled in the art to can understand the content of the present invention and implement it accordingly, but
The present invention is not limited to above-mentioned particular implementations.All various changes made within the scope of the claims are repaired
Decorations, should be covered by the scope of protection of the present invention.
Claims (8)
1. a kind of coal-fired thermal power system environments impact evaluation method based on evaluation of life cycle characterized by comprising
S1, coal fired power generation listings data, device fabrication listings data/production according to China Life cycle basis database and investigation
Steel emissions data obtains the Life Cycle Inventory of cogenerated products in coal-fired thermal power system；
S2, the Life Cycle Inventory according to cogenerated products, the environment for calculating coal-fired thermal power system influence load；
S3, load is influenced according to the environment of the coal-fired thermal power system, coal-fired thermal power is assessed according to the assessment models J pre-established
Influence grade of the system to environment.
2. the method according to claim 1, wherein the step S2 includes:
S21, analyzed and be grouped arrangement according to the information in cogenerated products Life Cycle Inventory, and by cogenerated products Life Cycle
The environment that data in phase inventory are divided into different groups influences in type；
S22, type is influenced for every group of environment, the environment is selected to influence one of type pollutant as reference pollutant,
Obtaining the environment influences the equivalent coefficient of other pollutants in type, and the equivalent coefficient referring to pollutant is 1；
S23, all contaminants in every group of environment influence type are converted according to equivalent coefficient, and summarized, obtain every group of ring
Border influences the latent value of influence of type；
S24, the latent value of the influence that type is influenced on every group of environment are standardized, and influence the power of type according to each group environment
It is weighted processing again, obtaining total weighting environment in cogenerated products life cycle influences the latent value of type；
S25, the weighting environment of all groups of environmental forms is influenced to the latent value addition of type, obtaining total environment influences load.
3. according to the method described in claim 2, it is characterized by:
It includes following one or more that environment in step S21, which influences type: global warming type, acidification type, eutrophy
Change type, human health poisons type, solid waste type and flue dust dust type；
In step S22, reference pollutant is CO in global warming type2, pollutant includes following one or more: CH4、
CO、N2O and CO2；
Reference pollutant is SO in acidification type2, pollutant includes following one or more: NOx、H2S, HCL and SO2；
Reference pollutant is NO in eutrophication type3, pollutant includes following one or more: NOx、COD、BOD、SS、N、
P and NO3；
It is SW that human health, which is poisoned in type referring to pollutant, and pollutant includes following one or more: ASH, GYPSUM,
PEAT and SW；
It referring to pollutant is TSP in flue dust dust type, pollutant includes following one or more: SA and TSP.
4. according to the method in claim 2 or 3, it is characterised in that:
In step S23, using formula one, obtaining every group of environment influences the latent value EI of influence of typeP(n)；
EIP(n)=∑mEIP(n)m=∑mMm×EIf(n)mFormula one；
Wherein, m indicates m kind pollutant；N indicates that environment influences type in n-th；EIPFor cogenerated products life cycle environmental impact
Latent value, EIfFor the equivalent coefficient of cogenerated products life cycle pollutant；M is cogenerated products life cycle environment pollution object
Discharge amount, unit are kilogram.
5. according to the method described in claim 4, it is characterized in that,
In step s 25, it is carried out obtaining total environment influence load EI according to formula twoIL；
EIIL=∑ WIp(n)=∑ (NEP (n) × WIf(n)) formula two；
Wherein, NEP (n) is that the total weighting environment obtained in step S24 influences the latent value of type；
EIr (n) 90 is that various environment influence the environmental influence value a reference values of types per capita for nineteen ninety China；NEP (n) indicates thermoelectricity
The standardized environment that product life cycle n environment influences type influences latent value；WIfIt (n) is cogenerated products life cycle n-th
Kind environment influences the corresponding weight coefficient of type；WIp(n) be cogenerated products life cycle n environment influence type weighting
Environmental influence value.
6. according to the method described in claim 5, it is characterized in that, step S3 includes:
The assessment models J pre-established are as follows:
7. according to the method described in claim 5, it is characterized in that,
It is influenced in type in the environment of global warming, CO2Standardized benchmark be 8700kg/year, weight coefficient 0.2；
NO in type is influenced in the environment of acidificationxStandardized benchmark be 36kg/year, weight coefficient 0.036；
NO in type is influenced in the environment of eutrophicationxStandardized benchmark be 62kg/year, weight coefficient 0.13；
It is influenced in type in the environment that human health is poisoned, NOxStandardized benchmark be 9100kg/year, weight coefficient is
0.085；
It is influenced in type in the environment of solid waste, the standardized benchmark of SW is 251kg/year, weight coefficient 0.026；
It is influenced in type in the environment of flue dust dust, the standardized benchmark of TSP is 18kg/year, weight coefficient 0.054.
8. according to the method described in claim 3, it is characterized in that,
CO in the pollutant of global warming type2Equivalent coefficient is 1；CH4Equivalent coefficient is 25；CO equivalent coefficient is 2；N2O equivalent
Coefficient is 320；
NO in the pollutant of acidification typexEquivalent coefficient is 0.7；SO2Equivalent coefficient is 1；H2S equivalent coefficient is 1.88；HCL works as
Coefficient of discharge is 0.88；
NO in the pollutant of eutrophication typexEquivalent coefficient is 1.35；NO3Equivalent coefficient is 1；COD equivalent coefficient is 0.23；
BOD equivalent coefficient is 1.79；SS equivalent coefficient is 0.85；N equivalent coefficient is 4.43；P equivalent coefficient is 32；
It is 1 that human health, which poisons SW equivalent coefficient in type,；ASH equivalent coefficient is 1；GYPSUM equivalent coefficient is 1；PEAT equivalent
Coefficient is 1；
TSP equivalent coefficient is 1 in flue dust dust type；SA equivalent coefficient is 1.
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| CN110795815A (en) * | 2019-09-08 | 2020-02-14 | 天津大学 | Method for evaluating life cycle environmental influence during boiler operation |
| CN112884372A (en) * | 2021-03-25 | 2021-06-01 | 武汉理工大学 | Method and device for evaluating environmental impact of Integrated Gasification Combined Cycle (IGCC) power generation system |
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2019
- 2019-03-11 CN CN201910181607.7A patent/CN109872079A/en active Pending
Non-Patent Citations (1)
| Title |
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| 刘安源等: "3种燃煤供暖锅炉环境影响的生命周期评价", 《洁净煤技术》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110795815A (en) * | 2019-09-08 | 2020-02-14 | 天津大学 | Method for evaluating life cycle environmental influence during boiler operation |
| CN110795815B (en) * | 2019-09-08 | 2023-12-26 | 天津大学 | Method for evaluating life cycle environmental influence during operation of boiler |
| CN112884372A (en) * | 2021-03-25 | 2021-06-01 | 武汉理工大学 | Method and device for evaluating environmental impact of Integrated Gasification Combined Cycle (IGCC) power generation system |
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Application publication date: 20190611 |