CN115034441B - Method for predicting full life cycle carbon emission of horizontal barrier system - Google Patents
Method for predicting full life cycle carbon emission of horizontal barrier system Download PDFInfo
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- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 229
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 228
- 230000004888 barrier function Effects 0.000 title claims abstract description 152
- 238000000034 method Methods 0.000 title claims abstract description 89
- 239000004927 clay Substances 0.000 claims abstract description 103
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- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 144
- -1 polypropylene Polymers 0.000 claims description 73
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 72
- 239000004743 Polypropylene Substances 0.000 claims description 72
- 229920001155 polypropylene Polymers 0.000 claims description 72
- 239000004744 fabric Substances 0.000 claims description 69
- 238000004519 manufacturing process Methods 0.000 claims description 39
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 36
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 238000005065 mining Methods 0.000 claims description 12
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- 239000004746 geotextile Substances 0.000 claims description 7
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- 241001494479 Pecora Species 0.000 claims description 3
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- 238000007781 pre-processing Methods 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 claims description 2
- 238000005253 cladding Methods 0.000 claims description 2
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- 239000010410 layer Substances 0.000 description 77
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 12
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 12
- 241000196324 Embryophyta Species 0.000 description 10
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- 239000005431 greenhouse gas Substances 0.000 description 4
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q10/00—Administration; Management
- G06Q10/04—Forecasting or optimisation specially adapted for administrative or management purposes, e.g. linear programming or "cutting stock problem"
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
- E02D31/04—Watertight packings for use under hydraulic pressure
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q10/00—Administration; Management
- G06Q10/06—Resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation modelling
- G06Q10/063—Operations research, analysis or management
- G06Q10/0639—Performance analysis of employees; Performance analysis of enterprise or organisation operations
- G06Q10/06393—Score-carding, benchmarking or key performance indicator [KPI] analysis
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0037—Clays
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0037—Clays
- E02D2300/004—Bentonite or bentonite-like
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/80—Management or planning
- Y02P90/84—Greenhouse gas [GHG] management systems
Abstract
The invention belongs to the field of carbon emission in environmental geotechnical engineering construction, and particularly relates to a method for predicting the total life cycle carbon emission of a horizontal barrier system, which comprises the following steps: 1. dividing a carbon emission source; 2. estimating the carbon emission produced by the barrier raw material; 3. estimating the transportation carbon emission of the blocking raw material; 4. pre-estimating the carbon emission of the pretreatment of the blocking site; 5. estimating the carbon emission of the barrier layer construction; 6. estimating the total carbon emission of the upper cover layer construction of the barrier layer; 7. and evaluating the carbon emission of the constructed or initially constructed barrier layer construction according to the carbon emission standard of the barrier layer construction. The evaluation method for the carbon emission of the barrier layer construction, which is established by the invention, has high universality. The carbon emission estimated by the construction of the compacted clay barrier layer is compared with the carbon emission of the barrier layer of the composite swelling waterproof blanket, and the design scheme with larger carbon emission is judged, so that the method has remarkable practical value for realizing the energy-saving low-carbon construction of the barrier layer.
Description
Technical Field
The invention relates to a method for predicting carbon emission of a horizontal barrier layer, in particular to a method for predicting the carbon emission of a horizontal barrier system in a full life cycle, wherein the horizontal barrier system is divided into a compacted clay horizontal barrier layer or a composite swelling waterproof blanket horizontal barrier layer.
Background
Because of the dual needs of horizontal barrier systems to meet gas barrier permeability, there are fewer and fewer natural barrier systems to meet these two needs, and geosynthetics are playing an increasingly important role in environmental and geotechnical applications. Currently, the energy consumption intensity range of cement production is 4.6-7.3MJ/kg, which is obviously not the primary choice of barrier material in the context of carbon peaks and carbon neutralization. The geosynthetic material and soil have higher energy efficiency and green sustainability. With reference to the landfill final coverage scheme, the barrier layer of the horizontal barrier is typically a single structure of natural compacted clay layers or a composite structure of natural compacted clay layers and bentonite waterproof carpets.
Current research on carbon emission calculations for horizontal barrier systems lacks relevant literature and reliability validation. The energy consumption carbon emission calculations of the horizontal barrier system are highly dependent on the quality of the environmental data used in the calculation process and the representativeness of the model parameters. Model parameters and model construction of the calculation process of the carbon emission of the horizontal barrier system are not clear, such as scheme design, transportation distance, working efficiency of geosynthetic material equipment and the like, so that research conclusions of different researchers lack the same research basis.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a prediction method for the full life cycle carbon emission of a horizontal barrier system, which simultaneously considers five steps of barrier raw material production, barrier raw material transportation, barrier site pretreatment, barrier layer construction and barrier layer upper cover layer construction, and provides a comprehensive and reliable evaluation method for the calculation of the full life cycle carbon emission in the design of the horizontal barrier system.
In order to solve the technical problems, the invention adopts the following technical scheme:
a method for predicting full life cycle carbon emissions of a horizontal barrier system, comprising the steps of:
step 1, dividing carbon emission sources
The full life cycle of the horizontal barrier system is divided into 5 stages, namely barrier raw material production, barrier raw material transportation, barrier site pretreatment, barrier layer construction and barrier layer upper cover layer construction, wherein carbon emission is derived from the barrier raw material production, the barrier raw material transportation, the barrier site pretreatment, the barrier layer construction and the barrier layer upper cover layer construction;
step 2, estimating the carbon emission produced by the barrier raw material;
step 3, estimating the carbon emission of the transportation of the blocking raw materials
Step 4, pre-estimating the carbon emission of the pretreatment of the blocking site;
step 5, estimating the carbon emission of the barrier layer construction;
step 6, pre-estimating the carbon emission of the upper cover layer construction of the barrier layer;
and 7, evaluating the carbon emission of the barrier layer which is planned or built.
As an improvement, when the horizontal barrier system is a compacted clay horizontal barrier layer, the specific steps of the calculation method are as follows:
firstly, raw material production is to mine clay meeting barrier performance parameters of a horizontal barrier system, and the calculation mode of carbon emission of raw material production is as follows:
in which Q kc Carbon emission for clay mining per hour, in kg; a is the design area of the barrier field, and the unit is m 2 ；h sj The thickness of the clay layer is designed for the separation field, and the unit is m; gamma ray t Blocking soil mass volume weight of field, unit m 3 /t；q w Working time for mining clay with unit mass for mechanical equipment, and unit h/kg; q t The fuel consumption per hour of mechanical equipment is L;carbon dioxide emitted for each liter of gasoline in kg/L;
the second step, the calculation mode of the clay transportation carbon emission is as follows:
Q CCLys ＝A·(Q ntys ·S ntcd +Q kzccl ·S ntkz ) (3)
in which Q CCLys Carbon emission for raw material transportation of the compacted clay layer is expressed in kg; q (Q) ntys The carbon emission amount per kilogram of clay transported to the blocking field per kilometer is transported to the transportation equipment, and the unit is kg/km; q (Q) kzccl The unit of carbon emission is kg/km for each kilometer during transportation and air running; s is S ntcd The distance from the mining site to the obstructing site is km for the transportation equipment; s is S ntkz The unit is km for the distance of transport equipment when no load exists;
thirdly, the pretreated carbon emission is calculated as follows:
in which Q CCLycl The carbon emission generated by preprocessing the field when compacting the clay layer is selected for the blocking scheme, wherein the unit is kg; t is t ttccl The time required for excavating a field to a depth of 1 meter per square meter is expressed in h/m 2 ；The unit is L/h for the oil consumption of excavating equipment per unit time; t is t zpccl The time required for leveling the field per square meter is expressed in h/m 2 ；/>The unit is L/h for the oil consumption of excavating equipment per unit time;
fourth, the construction carbon emission amount calculation method is as follows:
Q CCLsg ＝(Q ps +Q cys +Q xys +Q hsl +Q tgm )·A (7)
in which Q CCLsg For applying barrier layers by compacting clay barrier layersThe carbon emission of the worker is in kg; q (Q) ps For compacting the carbon emission amount generated when clay of the clay barrier layer is paved on a field, the unit is kg/m 2 ；Q cys For compacting the carbon emissions produced during the first compaction of the clay barrier layer clay laying, the unit is kg/m 2 ；Q xys The carbon emission produced in real time for the second compaction during clay laying of the compacted clay barrier layer is expressed in kg/m 2 ；Q hsl The unit of carbon emission produced by sprinkling water for ensuring the optimal water content of clay when the clay is paved for compacting the clay barrier layer is kg/m 2 ；Q tgm For compacting carbon emission produced during the production of clay barrier geomembrane, the unit is kg/m 2 ；
Fifthly, estimating the total carbon emission of the upper cover layer construction of the barrier layer, and calculating by the following formula:
in which Q sbfg Carbon emission amount ρ emitted for upper covering construction sbfg For the density of the upper cover employed, the unit is kg/m 3 ；h sbfg The unit is m for the thickness of the upper cover used;constructing carbon emission amount per kilogram of upper covering layer, wherein the unit is kg/kg;
sixth, according to the carbon emission standard of the barrier layer construction, evaluating the carbon emission of the planned or initially constructed barrier layer construction, and when the compacted clay layer is adopted as the barrier layer, calculating the total carbon emission as follows:
Q zccl ＝Q kc +Q CCLys +Q CCLycl +Q CCLsg +Q sbfg (10)
in which Q zccl The full life cycle carbon emission of the system is blocked horizontally by adopting a compacted clay layer.
As an improvement, in the second step, the carbon emission amount of the transportation equipment for transporting each kilogram of clay to the blocking site per kilometer is calculated according to the following formula:
in which W is mnt The weight of the transported goods is kg/car when each car is fully loaded;carbon emission per kilometer per ton of total transport equipment in kg/ha/km; v (V) ed For the full cargo volume of a single transport apparatus, in m 3 ；
The carbon emission per kilometer during transportation air running is calculated according to the following formula:
in which W is kznt The unit is kg/car for the self weight of the transportation equipment;
fourth, compacting the carbon emission generated when clay in the clay barrier layer is paved on the field, and calculating according to the following formula:
wherein t is psccl The time required for tiling the compacted clay per square meter is in h/m 2 ；The oil consumption per hour of the tiling equipment is L/h;
the amount of carbon emissions generated upon first compaction of the compacted clay barrier layer clay during laying is calculated according to the following formula:
wherein t is cysccl The time required per square meter for compacting the clay for the first compaction is in h/m 2 ；The oil consumption per hour of the tiling equipment is L/h;
the carbon emission produced in real time by the second compaction when the clay barrier layer clay is paved is calculated according to the following formula:
wherein t is xysccl The time required per square meter for the second compaction of the clay is in h/m 2 ；The oil consumption per hour of the tiling equipment is L/h;
the carbon emission amount generated by sprinkling water for ensuring the optimal water content of clay when the clay is compacted and the clay is paved is calculated according to the following formula:
wherein t is hslccl The time required for adjusting the optimal water content of clay per square meter is expressed in h/m 2 ；The oil consumption per hour of the water spraying equipment is L/h;
the carbon emission produced by compacting the clay barrier geomembrane is calculated according to the following formula:
wherein ρ is tgm The unit is kg/m for the density of the geomembrane 3 ；h hd The unit is m for the thickness of the geomembrane adopted;for carbon emissions per kilogram of geomembrane, the reference value is 1.6kg CO 2 /kg。
As an improvement, when the horizontal barrier system is a composite swelling waterproof blanket barrier, the specific steps are as follows:
step a, raw material production comprises bentonite exploitation, bentonite transportation, bentonite pretreatment and composite swelling waterproof blanket production processing, wherein the calculation mode of the raw material production carbon emission is as follows:
Q pex ＝(Q pkc +Q pys +Q ycl +Q pjg )·A (2)
in which Q pex Carbon emissions produced for raw materials of the composite intumescent waterproof blanket barrier in kg/m 2 ；Q pkc For the production of bentonite per hour, the carbon emissions are in kg/m 2 ；Q pys For transporting the mined bentonite to the processing plant with carbon emissions in kg/m 2 ；Q pycl Carbon emissions in kg/m for pretreatment of bentonite in a processing plant 2 ；Q pjg For processing bentonite into a swelled waterproof blanket, the carbon emission is expressed in kg/m 2 The method comprises the steps of carrying out a first treatment on the surface of the A is the design area of the barrier field, and the unit is m 2 ；
Step b, the calculation mode of the carbon emission amount in the transportation process of the swelling waterproof blanket is as follows:
Q GCLys ＝A·(Q ysgcl +Q kzgcl +Q GCLxz ) (4)
in which Q GCLys For the carbon emission amount during the transportation of the swelling waterproof blanket, Q ysgcl The unit of carbon emission for transporting the bentonite waterproof blanket per square meter to a barrier site by transportation equipment is kg/m 2 ；Q kzgcl For transporting the carbon emission of the bentonite waterproof blanket per square meter when the blanket runs out, the unit is kg/m 2 ；Q GCLxz For dischargingThe carbon emission of the bentonite waterproof blanket is carried per square meter, and the unit is kg/m 2 ；
Step c, through the compaction site, the carbon emission is calculated according to the following formula:
in which Q GCLycl The carbon emission generated by preprocessing the field when compacting the clay layer is selected for the blocking scheme, wherein the unit is kg; t is t ttgcl The time required for excavating a field to a depth of 1 meter per square meter is expressed in h/m 2 ；t zpgcl The time required for leveling the field per square meter is expressed in h/m 2 ；t ysgcl The time required for compacting the field per square meter is expressed in h/m 2 ；The unit is L/h for the oil consumption of excavating equipment per unit time; />The unit is L/h for the fuel consumption of compaction equipment in unit time;
and d, calculating the carbon emission amount of construction according to the following mode:
in which Q psgcl The unit of carbon emission generated when paving the bentonite waterproof blanket is kg; t is t psgcl The time required for laying the bentonite waterproof blanket per square meter is expressed as h/m 2 ；Adopting the oil consumption of paving equipment per hour, L/h;
in which Q sbfg Carbon emissions generated for the upper cladding construction; ρ sbfg For the density of the upper cover employed, the unit is kg/m 3 ；h sbfg The unit is m for the thickness of the upper cover used;constructing carbon emission amount per kilogram of upper covering layer, wherein the unit is kg/kg;
step f, evaluating carbon emission of the construction of the planned or built barrier layer, wherein the total carbon emission is calculated as follows:
Q zgcl ＝Q pex +Q GCLys +Q GCLycl +Q GCLsg +Q sbfg (11)
in which Q zgcl The full life cycle carbon emission of the horizontal barrier system adopting the bentonite waterproof blanket.
As an improvement, the carbon emission of the mined bentonite described in step a is regarded as substep a1, calculated according to the following formula:
in which Q pkc For the production of bentonite per hour, the carbon emissions are in kg/m 2 ；W prt In kg/m for the production of bentonite per square meter of the swelled water-proof blanket 2 The method comprises the steps of carrying out a first treatment on the surface of the Beta is the floating coefficient considering the breakage; q t The fuel consumption of bentonite is the unit mass of mechanical equipment, and the unit is L/kg;kg/L of carbon dioxide emitted per liter of gasoline;
the carbon emission produced by the transportation of bentonite in the production site is considered as substep a2, calculated according to the following formula:
in which Q pys For transporting the mined bentonite to the processing plant with carbon emissions in kg/m 2 ；W prt In kg/m for the production of bentonite per square meter of the swelled water-proof blanket 2 ；q prtys The fuel consumption of the transportation equipment per kilogram is L/kg;kg/L of carbon dioxide emitted per liter of gasoline; s is S j Distance from the bentonite processing plant to the mining site;
the bentonite pretreatment, including the carbon emission amount generated by crushing, screening and drying, is regarded as a substep a3, and is calculated according to the following formula:
Q pycl ＝W prt ·q prtcl ·S j (14)
in which Q pycl Carbon emissions in kg/m for pretreatment of bentonite in a processing plant 2 ；q prtcl Carbon emission generated by pretreatment of bentonite per unit mass is kg/kg;
the carbon emission amount when bentonite and geotextile are processed into the bentonite waterproof blanket is regarded as a substep a4, and the carbon emission amount is calculated according to the following formula:
Q pjg ＝Q jxxm +Q fjxxm (15)
in which Q pjg Kg/m of carbon dioxide discharged for processing geotextiles 2 ；Q jxxm For processing carbon dioxide discharged by the polypropylene fabric surface of the bentonite waterproof blanket, kg/m 2 ；Q fjxxm For processing carbon dioxide discharged by non-polypropylene fabric surface of bentonite waterproof blanket, kg/m 2 。
Further improved is that the polypropylene fabric surface in the substep a4 is used as the material on the bentonite waterproof blanket, and the calculation mode of the carbon emission when processing the bentonite waterproof blanket polypropylene fabric surface is as follows:
Q jxxm ＝Q jzz +Q jys (16)
in which Q jzz Carbon dioxide discharged from polypropylene fabric surface of bentonite waterproof blanket for producing bentonite waterproof blanket, kg/m 2 ；Q jys For transporting carbon dioxide discharged by the polypropylene fabric surface of the bentonite waterproof blanket, kg/m 2 。
Further improved is that the non-polypropylene fabric surface in the substep a4 is used as the material under the bentonite waterproof blanket, and the carbon emission amount when the bentonite waterproof blanket is processed is calculated according to the following formula:
Q fjxxm ＝Q fjzz +Q fjys (17)
in which Q fjxxm For the carbon emission amount in processing the non-polypropylene fabric surface of the bentonite waterproof blanket, kg/m 2 ；Q jzz For producing carbon dioxide discharged from non-polypropylene fabric surface of bentonite waterproof blanket, kg/m 2 ；Q jys Kg/m of carbon dioxide discharged for transporting the non-polypropylene fabric surface of the bentonite waterproof blanket 2 。
Further improved is that the carbon emission of the polypropylene fabric of the bentonite waterproof blanket is treated as substep a4 (1), calculated according to the following formula:
Q jzz ＝W jzz ·q jzz (18)
in which Q jzz Carbon dioxide discharged from polypropylene fabric surface of bentonite waterproof blanket for producing bentonite waterproof blanket, kg/m 2 ；W jzz The weight of the polypropylene fabric required by the polypropylene fabric surface of the bentonite waterproof blanket is kg/m 2 ；q jzz For producing carbon emissions per kilogram of polypropylene fabric, the unit is kg/kg;
the carbon emission of the polypropylene fabric of the transport bentonite waterproof blanket is regarded as substep a4 (2), calculated according to the following formula:
in which Q jys Swelling for transportationCarbon dioxide discharged by polypropylene fabric surface of soil waterproof blanket, kg/m 2 ；S yl The distance between the production place of the polypropylene fabric and a bentonite processing plant is km; w (W) mj Adding the weight of the bentonite waterproof blanket polypropylene fabric surface into the transportation equipment, wherein the unit is kg/car; n is n j The number of transport devices required per unit area, in car/m 2 ；S kz Is the distance travelled by an empty wagon, and the unit is km;carbon emission per kilometer per ton for the total weight of the transport equipment, in kg/t/km; w (W) jkz For the vehicle weight of the transport device, the unit is kg/vehicle.
As an improvement, the carbon emission of the non-polypropylene fabric of the bentonite waterproof blanket is considered as substep a4 (3), calculated according to the following formula:
Q fjzz ＝W fjzz ·q fjzz (20)
in which Q jzz For producing carbon dioxide discharged from non-polypropylene fabric surface of bentonite waterproof blanket, kg/m 2 ；W fjzz The weight of the polypropylene fabric required by the non-polypropylene fabric surface of the bentonite waterproof blanket per square meter is kg/m 2 ；q fjzz Carbon emissions in kg/kg for producing a non-polypropylene fabric per kg;
the carbon emission of the transport bentonite waterproof blanket non-polypropylene fabric is considered as substep a4 (4), calculated according to the following formula:
in which Q jys Kg/m of carbon dioxide discharged for transporting the non-polypropylene fabric surface of the bentonite waterproof blanket 2 ；S fyl The distance between the production place of the non-polypropylene fabric and a bentonite processing plant is km; w (W) mfj Adding the weight of the bentonite waterproof blanket polypropylene fabric surface into the transportation equipment, wherein the unit is kg/car; n is n fj Is required for unit areaIn units of cars/m 2 ；W fjkz The weight is the weight of the transport equipment at no load, and the unit is kg.
As an improvement, the carbon emission of the bentonite waterproof blanket transported by the transportation equipment in the step b to the barrier site per kilometer is calculated according to the following formula:
wherein S is gclcd The unit is km for transporting the bentonite waterproof blanket; w (W) mgcl The total weight of the bentonite waterproof blanket fully loaded for the vehicle is kg/vehicle; n is n mgcl The number of trucks required for transporting the bentonite waterproof blanket per hectare is in units of cars/m 2 ；
The carbon emission per kilometer when the bentonite waterproof blanket is transported and run out is calculated according to the following formula:
wherein S is gclkz The unit is km for the idle running distance after the bentonite waterproof blanket is transported;
unloading the carbon emission of the bentonite waterproof blanket per square meter, and calculating according to the following formula:
wherein t is zgcl The unit of the working time required for unloading each square meter of GCL is h;for unloading the fuel consumption per hour of the plant, the unit is L.
Advantageous effects
Compared with the prior art, the method for predicting the full life cycle carbon emission of the horizontal barrier system has the following advantages:
(1) According to the invention, parameters such as model, power, production capacity, comprehensive oil consumption and the like of construction machinery equipment at each stage are set according to the horizontal barrier layer, a theoretical calculation model of carbon emission in the whole life cycle of the horizontal barrier layer is established, the data is accurate, the applicability is strong, the estimation model can be directly sleeved by the data acquisition, the calculation is simple and convenient, and the universality is high;
(2) The prediction method fills the blank of a carbon emission evaluation system of the whole life cycle of the barrier layer in the risk management and control technology, comprehensively evaluates from three aspects of a production end, a supply end and a construction end, divides the production flow and the process of each stage, determines the carbon emission and the carbon emission type, has comprehensive considered elements, can be used for energy conservation, emission reduction and carbon sink calculation, and has high reference value;
(3) The invention determines the common two evaluation models of the full life cycle carbon emission of the horizontal barrier layers, has important significance for the design scheme selection of the horizontal barrier layers and has important reference significance for the project scheme selection.
Drawings
FIG. 1 is a flow chart of a method for predicting full life cycle carbon emissions of a horizontal barrier system according to the present invention.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to examples, but it will be understood by those skilled in the art that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention.
Considering that diesel contains methane and nitrous oxide, the ratio of the two gases in the exhaust emission is not neglected. In addition, these gases have different Global Warming Potential (GWP) in order to measure the contribution of the gases to global warming or climate change. The greenhouse gases contained in the calculations are three major greenhouse gases, namely carbon dioxide, methane and nitrous oxide. Carbon dioxide has a GWP of 1.0 by definition. To quantitatively include the contribution of methane and nitrous oxide to the overall impact, the mass of methane and nitrous oxide emissions is multiplied by their respective GWP factors and then added to the mass emissions of carbon dioxide to calculate the carbon dioxide equivalent mass emissions. For purposes of this patent, GWP is taken from the values listed in the USEPA specified greenhouse gas emission enforcement report (USEPA, 2010). The GWP of GHG considered in this analysis is:
carbon dioxide=1.0
Methane=21
Nitrous oxide=310
Using the relative GWPS of greenhouse gases, the equivalent mass of carbon dioxide (CO 2 eq) is as follows:
1.0×kg CO 2 +21.0×kg CH 4 +310.0×kg N 2 O＝kg CO 2 eq。
the present invention should follow the 5-point assumption when compacting clay layers as the primary horizontal barrier: 1. thickness h of compacted clay layer sj 0.6m;2. the density of the loose clay is 1400kg/m3;3. taking a compaction coefficient of 1.38;4. the compacted clay layer may be placed in compaction at a rate of 1500 cubic meters per day; 5. regional operations of one hectare (10 hours/day) can be completed for four days.
The bentonite waterproof blanket in the invention is used as a main horizontal barrier layer and is supposed to follow 5 points: 1. the weight of the bentonite waterproof blanket, the polypropylene geotextile and the non-polypropylene geotextile in unit area is 4.3kg/m respectively 2 、105g/m 2 And 200g/m 2 The method comprises the steps of carrying out a first treatment on the surface of the 2. The bentonite waterproof blanket of the hectare land can be paved after working for 10 hours each day for 2.5 days; 3. carbon emissions when producing polypropylene geotextiles were 2.7tCO with reference to the study data of ICE2008 2 T;4. carbon emission reference DAI for bentonite processing in 2010 investigation data was 43kgCO 2 /t。
Emission coefficients of construction machines are referenced EPA 430-K-08-004 and EPA 430-R-08-006:
1. 2.68kg CO per liter of gasoline is produced 2 ；
2. Methane in gasoline per liter will produce 0.021kg of CO 2 ；
3. The nitrous oxide in the gasoline per liter will produce 0.021kg of CO 2 ；
Thus per liter of gasoline carbon emissions2.71kg/h.
Based on the study data of ICE2008, the carbon emission produced by HDPE production was 1.6tCO 2 T; the construction carbon emission of the upper coating layer is 0.005tCO 2 T; carbon emission of transportation equipment such as trucks0.204kg CO 2 eq/km。
Regarding the compacted clay layer as a main horizontal barrier layer, in the second step, a CAT 329 excavator is used for excavating clay, and clay which can be mined after 40 hours of working can meet the paving requirement of the compacted clay layer reaching 1 hectare. Oil consumption q of CAT 329 excavator per hour t 24.5L/h. Can obtain 2656kg CO of carbon emission per hectare 2 /ha。
In the second step, a load of 15455kg and a load of 15m is assumed for an empty truck 3 The clay site is excavated 16km from the isolated site. Each vehicle can carry the clay with the following weight:
W edhz ＝15m 3 vehicle X1400 kg/m 3 =21000 kg/car;
weight W of full-load vehicle mnt +W cz 36455 kg/car;
the number of trucks needed for a hectare site is:
the transportation equipment transports the carbon emission per kilogram of clay to the barrier site per kilometer:
carbon emissions per kilometer at empty load of the transport equipment:
when it is assumed that the transportation equipment is transported from the mining site to the obstructing site at a distance S ntcd And the distance S of the transport device when empty ntkz All are 16km, then
Q CCLys ＝4105.1255×16+1740.375×16＝93528kg/ha
When the compacted clay layer is used as a main barrier layer, the site pretreatment in the step 4 is performed, and the excavating requirement of 1m depth of 1 hectare of land can be met by working one CAT D6 bulldozer for 25 hours; a CAT 160 leveling machine works for 25 hours to meet the leveling requirement of 1 hectare land; oil consumption per hour of the data provided by CDeltaT companyAnd->25.7L/h and 23.1L/h, Q CCLycl ＝25×25.7×2.71+25×23.1×2.71＝3306kg/ha。
When the compacted clay layer is used as a main barrier layer, the carbon emission of barrier layer construction in the step 5 can meet the requirement of laying the clay layer of 1 hectare of land after working for 40 hours by adopting a CAT D6 bulldozer, and then the carbon emission Q generated when the compacted clay barrier layer clay is laid to the field ps ＝40×25.7×2.71＝2786kg/ha；
When compacting clay barrier layer for the first time by CAT 815 compacting machine (sheep foot roller), 1 hectare of land can be compacted for about 40 hours, and the oil consumption of the equipment is based on the information provided by CAT company42L/h, then Q cys ＝40×42×2.71＝4553kg/ha；
The compacted clay barrier layer is compacted for the second time by CAT 815 compacting machine (roller mill) for the same rice, then Q xvs ＝40×42×2.71＝4553kg/ha；
Adopts a sprinkler pairCompacting clay layer to spray water to ensure moisture content of clay layer, oil consumption of spraying vehicle14L/h, then Q hsl ＝40×14×2.71＝1518kg/ha；
Assuming that the HDPE geomembrane has a thickness of 1.5mm, the carbon emission produced during geomembrane production is Q tgm ＝940×0.0015×1.15×10000×1.6＝25944kg/ha。
The construction h of the upper covering layer in the step 6 when the compacted clay layer is taken as the main barrier layer sbfg Typically 0.3m thick sand layer, density ρ sbfg At 1733kg/m 3 About, according to the data provided by ICE in 2008, the sand layer lays carbon emission0.005kg/kg;
then in the fifth step Q sbfg ＝1733×0.3×0.005×10000＝26000kg/ha。
Substeps a1, W in step a for bentonite waterproofing carpets as the primary horizontal barrier layer prt Typically 4.3kg/m 2 Beta is the floating coefficient considering the break, 1.15 is more proper, q t The oil consumption of bentonite per unit mass of mechanical equipment is 2.92L/t,for each liter of carbon dioxide emitted by the petrol, 2.71kg/L was taken. Carbon emission Q of bentonite pys ＝4.3×1.15×2.92×2.71÷1000＝0.0391kg/m 2 ；
In substep a2, q prtqy The total weight of the transportation equipment per kilometer is similar to the value of the transportation equipment in the compacted clay, is 2.08L/kg/km,carbon dioxide discharged per liter of gasoline, kg/l, S j Typically take a value of 1km.
Then the carbon emission amount Q can be obtained pys ＝4.945×2.08×2.71＝0.028kg/m 2 ；
In the substep a3, according to the investigation result43kg/t, according to the formula mentioned above
Substep a4 (1), W jzz The weight of the polypropylene fabric required for the polypropylene fabric face of the bentonite waterproof blanket per square meter is usually 0.11kg/m 2 ；q jzz The carbon emissions per kilogram of polypropylene fabric produced is typically 2.7kg/kg;
Q jzz ＝β·W jzz ·q jzz ＝0.11×1.15×2.7＝0.3416kg/m 2
substep a4 (2), considering that the bentonite mining area of China is mainly in the three northeast provinces and Xinjiang and other places, assume that the polypropylene fabric production place is distant from the distance S of a bentonite processing plant fyl Assuming a1 hectare floor at 2760km, approximately 150580m is required 2 About 0.076 of the rated load of the truck, i.e. 0.076 truck traffic per hectare:
substep a4 (3), weight W of polypropylene fabric required for non-polypropylene fabric face of bentonite waterproof blanket per square meter fjzz Is 0.2kg/m 2 The carbon dioxide discharged by the non-polypropylene fabric surface of the bentonite waterproof blanket is
Q fjzz ＝β·W fjzz ·q fjzz ＝0.2×1.15×2.7＝0.621kg/m 2 ；
Substep a4 (4), consider that the bentonite mining area of China is mainly in the three northeast provinces and Xinjiang and other places, and assume that the non-polypropylene fabric production place is distant from the distance S of a bentonite processing plant fyl Assuming a1 hectare floor at 2760km, approximately 28100m is required 2 About 0.409 of the rated load of the truck, i.e., 0.409 truck transportation per hectare. Carbon dioxide emitted by the non-polypropylene fabric of the transportation bentonite waterproof blanket was calculated as follows:
in substep b, S gclcd Set to 1610km, the weight of the truck when empty is 15455 kg/truck, and the total weight W of the bentonite waterproof blanket is typically full of each truck mgcl 36365 kg/car (including the weight of the car). Each vehicle can load about 17 rolls 209m 2 Bentonite waterproof blanket of (2) number of trucks required per hectareAnd (5) a vehicle.
Then calculate to
Carbon emission of empty load in the same way
Unloading the bentonite carpets requires a CAT TL355 forklift, which works for 25 hours to unload the bentonite carpets meeting the 1 hectare barrier layer laying requirement. The oil consumption of the forklift is 14L/h per hour, and the carbon emission of the bentonite waterproof blanket required for laying the barrier layer for unloading 1 hectare is
The first two terms of the calculation formula of the carbon emission amount of the bentonite waterproof blanket blocking field in the field pretreatment in the step c are consistent with the compacted clay layer, but the third term is further compaction. Rough roll with CAT 815The drum was compacted for about 25 hours to meet 1 hectare site demand, with 42L per hour of equipment consumption, thus the third term is calculated as
In the step d, a CAT 329 laying machine is used for laying the bentonite waterproof blanket, the oil consumption of equipment per hour is 24.5L, a bentonite waterproof blanket barrier layer of 1 hectare can be laid in 25 hours of operation, and the carbon emission amount except the geomembrane is
In summary, both schemes are organized as shown in tables 1 and 2,
TABLE 1 summary of carbon emissions with compacted clay layers as the primary barrier layer
Table 2 summary of carbon emissions with bentonite waterproof blanket as the primary barrier
/>
In combination with the above embodiments, the present invention solves the problem that the horizontal barrier system has no reliable carbon emission calculation model. All parameters in the invention are obtained by an expert investigation method and a literature reference method; although the invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will recognize that certain technical features may be substituted for those illustrated in the figures; such modifications and substitutions do not depart from the essence of the corresponding technical solutions.
Claims (7)
1. A method for predicting full life cycle carbon emissions of a horizontal barrier system, comprising the steps of:
step 1, dividing carbon emission sources
The full life cycle of the horizontal barrier system is divided into 5 stages, namely barrier raw material production, barrier raw material transportation, barrier site pretreatment, barrier layer construction and barrier layer upper cover layer construction, wherein carbon emission is derived from the barrier raw material production, the barrier raw material transportation, the barrier site pretreatment, the barrier layer construction and the barrier layer upper cover layer construction;
step 2, estimating the carbon emission produced by the barrier raw material;
step 3, estimating the carbon emission of the transportation of the blocking raw materials
Step 4, pre-estimating the carbon emission of the pretreatment of the blocking site;
step 5, estimating the carbon emission of the barrier layer construction;
step 6, pre-estimating the carbon emission of the upper cover layer construction of the barrier layer;
step 7, evaluating the carbon emission of the barrier layer to be built or initially built;
when the horizontal barrier system is a compacted clay horizontal barrier layer, the specific steps are as follows:
firstly, raw material production is to mine clay meeting barrier performance parameters of a horizontal barrier system, and the calculation mode of carbon emission of raw material production is as follows:
（1）
in the method, in the process of the invention,carbon emission for clay mining per hour, in kg; />To design area of the barrier field, the unit is m 2 ；The thickness of the clay layer is designed for the separation field, and the unit is m; />The unit m of the volume weight of the soil body of the clay mining site 3 /t；/>Working time for mining clay with unit mass for mechanical equipment, and unit h/kg; />The fuel consumption per hour of mechanical equipment is L;carbon dioxide emitted for each liter of gasoline in kg/L;
the second step, the calculation mode of the clay transportation carbon emission is as follows:
（3）
in the method, in the process of the invention,carbon emission for raw material transportation of the compacted clay layer is expressed in kg; />The carbon emission amount per kilogram of clay transported to the blocking field per kilometer is transported to the transportation equipment, and the unit is kg/km; />The unit of carbon emission is kg/km for each kilometer during transportation and air running; />The distance from the mining site to the obstructing site is km for the transportation equipment; />The unit is km for the distance of transport equipment when no load exists;
wherein, in the second step, the transportation equipment transports the carbon emission amount of each kilogram of clay transported to the blocking site per kilometer, and the carbon emission amount is calculated according to the following formula:
（22）
in the method, in the process of the invention,the weight of the transported goods is kg/car when each car is fully loaded; />Carbon emission per kilometer per ton of total transport equipment in kg/ha/km; />For the full cargo volume of a single transport apparatus, in m 3 ；
The carbon emission per kilometer during transportation air running is calculated according to the following formula:
（23）
in the method, in the process of the invention,the unit is kg/car for the self weight of the transportation equipment;
thirdly, the pretreated carbon emission is calculated as follows:
（5）
in the method, in the process of the invention,the carbon emission generated by preprocessing the field when compacting the clay layer is selected for the blocking scheme, wherein the unit is kg; />The time required for excavating a field to a depth of 1 meter per square meter is expressed in h/m 2 ；/>The unit is L/h for the oil consumption of excavating equipment per unit time; />The time required for leveling the field per square meter is expressed in h/m 2 ； The unit is L/h for the oil consumption of leveling equipment in unit time;
fourth, the construction carbon emission amount calculation method is as follows:
（7）
in the method, in the process of the invention,the unit of carbon emission is kg when the clay blocking layer is compacted; />For compacting the carbon emission amount generated when clay of the clay barrier layer is paved on a field, the unit is kg/m 2 ；/>For compacting the carbon emissions produced during the first compaction of the clay barrier layer clay laying, the unit is kg/m 2 ；/>The carbon emission produced in real time for the second compaction during clay laying of the compacted clay barrier layer is expressed in kg/m 2 ；/>The unit of carbon emission produced by sprinkling water for ensuring the optimal water content of clay when the clay is paved for compacting the clay barrier layer is kg/m 2 ;/>For compacting carbon emission produced during the production of clay barrier geomembrane, the unit is kg/m 2 ；
Wherein, the carbon emission amount generated when the compacted clay barrier clay is paved on the field is calculated according to the following formula:
（27）
in the method, in the process of the invention,the time required for tiling compacted clay per square meter by adopting bulldozer is expressed as h/m 2 ；/>Tiling the oil consumption per hour by adopting a bulldozer, wherein the oil consumption per hour is L/h;
the amount of carbon emissions generated upon first compaction of the compacted clay barrier layer clay during laying is calculated according to the following formula:
（28）
in the method, in the process of the invention,for compacting every square meter for the first time by adopting a compacting machine and a sheep foot rollerThe time required is in h/m 2 ；/>The oil consumption per hour of the first compaction operation is L/h by adopting a compaction machine sheep foot roller;
the carbon emission produced in real time by the second compaction when the clay barrier layer clay is paved is calculated according to the following formula:
（29）
in the method, in the process of the invention,the time required for the second compaction per square meter for the roller compaction machine is h/m 2 ；/>The oil consumption of the second compaction operation per hour is L/h by adopting a compaction mechanical roller mill;
the carbon emission amount generated by sprinkling water for ensuring the optimal water content of clay when the clay is compacted and the clay is paved is calculated according to the following formula:
（30）
in the method, in the process of the invention,the time required for adjusting the optimal water content of clay per square meter is expressed in h/m 2 ；/>The oil consumption per hour of the water spraying equipment is L/h;
the carbon emission produced by compacting the clay barrier layer per square meter of geomembrane is calculated according to the following formula:
（31）
in the method, in the process of the invention,is the density of the geomembrane, and the unit is kg/m 3 ；/>The unit is m for the thickness of the geomembrane adopted;for carbon emissions per kilogram of geomembrane, the reference value is 1.6kg CO 2 /kg；
Fifthly, estimating the total carbon emission of the upper cover layer construction of the barrier layer, and calculating by the following formula:（9）
in the method, in the process of the invention,carbon emission amount emitted for upper covering construction,/->For the density of the upper cover employed, the unit is kg/m 3 ；/>The unit is m for the thickness of the upper cover used; />Constructing carbon emission amount per kilogram of upper covering layer, wherein the unit is kg/kg;
sixth, according to the carbon emission standard of the barrier layer construction, evaluating the carbon emission of the planned or initially constructed barrier layer construction, and when the compacted clay layer is adopted as the barrier layer, calculating the total carbon emission as follows:
（10）
in the method, in the process of the invention,the full life cycle carbon emission of the horizontal barrier system adopting the compacted clay layer;
when the horizontal barrier system is a composite swelling waterproof blanket barrier layer, the specific steps are as follows:
step a, raw material production comprises bentonite exploitation, bentonite transportation, bentonite pretreatment and composite swelling waterproof blanket production processing, wherein the calculation mode of the raw material production carbon emission is as follows:（2）
in the method, in the process of the invention,carbon emissions produced for raw materials of the composite intumescent waterproof blanket barrier in kg/m 2 ； />For the production of bentonite per hour, the carbon emissions are in kg/m 2 ； />For transporting the mined bentonite to the processing plant with carbon emissions in kg/m 2 ；/>Carbon emissions in kg/m for pretreatment of bentonite in a processing plant 2 ；/>For processing bentonite into a swelled waterproof blanket, the carbon emission is expressed in kg/m 2 ; />To design area of the barrier field, the unit is m 2 ；
Step b, the calculation mode of the carbon emission amount in the transportation process of the swelling waterproof blanket is as follows:（4）
in the method, in the process of the invention,carbon emission amount during transportation of swelling waterproof blanket, < >>The unit of carbon emission for transporting the bentonite waterproof blanket per square meter to a barrier site by transportation equipment is kg/m 2 ；/>For transporting the carbon emission of the bentonite waterproof blanket per square meter when the blanket runs out, the unit is kg/m 2 ；/>For unloading the carbon emissions per square meter of bentonite water blanket, the unit is kg/m 2 ；
Step c, through the compaction site, the carbon emission is calculated according to the following formula:（6）
in the method, in the process of the invention,the carbon emission produced by the pretreatment of the field when compacting the clay layer is selected for the blocking scheme, the unit is kg>To excavate 1 meter deep per square meter of the fieldThe time required is in h/m 2 ；/>The time required for leveling the field per square meter is expressed in h/m 2 ；/>The time required for compacting the field per square meter is expressed in h/m 2 ; />The unit is L/h for adopting the oil consumption of the leveling machine in unit time; />The unit is L/h for the fuel consumption of compaction equipment in unit time;
and d, calculating the carbon emission amount of construction according to the following mode:（8）
in the method, in the process of the invention,the unit of carbon emission generated when paving the bentonite waterproof blanket per square meter is kg; />The time required for paving the bentonite waterproof blanket per square meter for crane paving equipment is expressed as h/m 2 ；/>Adopting the oil consumption of paving equipment per hour, L/h;
and e, estimating the total carbon emission of the upper cover layer construction of the barrier layer, wherein the calculation mode is as follows:（9）
in the method, in the process of the invention,carbon emissions generated for the upper cladding construction; />For the density of the upper cover employed, the unit is kg/m 3 ；/>The unit is m for the thickness of the upper cover used; />Constructing carbon emission amount per kilogram of upper covering layer, wherein the unit is kg/kg;
step f, evaluating carbon emission of the construction of the planned or built barrier layer, wherein the total carbon emission is calculated as follows:
（11）
in the method, in the process of the invention,the full life cycle carbon emission of the horizontal barrier system adopting the bentonite waterproof blanket.
2. A method of predicting full life cycle carbon emissions of a horizontal barrier system as claimed in claim 1, wherein: the carbon emission of the mined bentonite described in step a is regarded as substep a1, calculated according to the following formula:（12）
in the method, in the process of the invention,for the production of bentonite per hour, the carbon emissions are in kg/m 2 ；/>In kg/m for the production of bentonite per square meter of the swelled water-proof blanket 2 ； />To consider the floating coefficient of the break; />The fuel consumption of bentonite is the unit mass of mechanical equipment, and the unit is L/kg; />kg/L of carbon dioxide emitted per liter of gasoline;
the carbon emission produced by the transportation of bentonite in the production site is considered as substep a2, calculated according to the following formula:（13）
in the method, in the process of the invention,for transporting the mined bentonite to the processing plant with carbon emissions in kg/m 2 ；/>In kg/m for the production of bentonite per square meter of the swelled water-proof blanket 2 ；/>The fuel consumption of the transportation equipment per kilogram is L/kg; />kg/L of carbon dioxide emitted per liter of gasoline; />Distance from the bentonite processing plant to the mining site;
the bentonite pretreatment, including the carbon emission amount generated by crushing, screening and drying, is regarded as a substep a3, and is calculated according to the following formula:
（14）
in the method, in the process of the invention,carbon emissions in kg/m for pretreatment of bentonite in a processing plant 2 ；/>Carbon emission generated by pretreatment of bentonite per unit mass is kg/kg;
the calculation of the carbon emission amount when bentonite and geotextile are processed into the bentonite waterproof blanket is regarded as a substep a4, and the calculation is carried out according to the following formula:
（15）
in the method, in the process of the invention,kg/m of carbon dioxide discharged for processing geotextiles 2 ;/>For processing carbon dioxide discharged by the polypropylene fabric surface of the bentonite waterproof blanket, kg/m 2 ;/>For processing carbon dioxide discharged by non-polypropylene fabric surface of bentonite waterproof blanket, kg/m 2 。
3. According to claim 2A method for predicting the full life cycle carbon emission of a horizontal barrier system, which is characterized in that: the polypropylene fabric surface in the substep a4 is used as the material on the bentonite waterproof blanket, and the calculation mode of the carbon emission when the bentonite waterproof blanket polypropylene fabric surface is processed is as follows: （16）
in the method, in the process of the invention,carbon dioxide discharged from polypropylene fabric surface of bentonite waterproof blanket for producing bentonite waterproof blanket, kg/m 2 ;/>For transporting carbon dioxide discharged by the polypropylene fabric surface of the bentonite waterproof blanket, kg/m 2 。
4. A method of predicting full life cycle carbon emissions of a horizontal barrier system as claimed in claim 2, wherein: the non-polypropylene fabric surface in the substep a4 is used as a material below the bentonite waterproof blanket, and the carbon emission amount when the bentonite waterproof blanket is processed is calculated according to the following formula:（17）
in the method, in the process of the invention,for the carbon emission amount in processing the non-polypropylene fabric surface of the bentonite waterproof blanket, kg/m 2 ；/>For producing carbon dioxide discharged from non-polypropylene fabric surface of bentonite waterproof blanket, kg/m 2 ;/>For transportation ofCarbon dioxide discharged by non-polypropylene fabric surface of bentonite waterproof blanket, kg/m 2 。
5. A method of predicting full life cycle carbon emissions of a horizontal barrier system as claimed in claim 3, wherein: the carbon emission of the polypropylene fabric of the bentonite waterproof blanket is considered as substep a4 (1), calculated according to the following formula:（18）
in the method, in the process of the invention,carbon dioxide discharged from polypropylene fabric surface of bentonite waterproof blanket for producing bentonite waterproof blanket, kg/m 2 ；/>The weight of the polypropylene fabric required by the polypropylene fabric surface of the bentonite waterproof blanket is kg/m 2 ；/>For producing carbon emissions per kilogram of polypropylene fabric, the unit is kg/kg;
the carbon emission of the polypropylene fabric of the transport bentonite waterproof blanket is regarded as substep a4 (2), calculated according to the following formula:
（19）
in the method, in the process of the invention,for transporting carbon dioxide discharged by the polypropylene fabric surface of the bentonite waterproof blanket, kg/m 2 ；/>Distance from production place of polypropylene fabric to bentonite processing plantBits are km; />Adding the weight of the bentonite waterproof blanket polypropylene fabric surface into the transportation equipment, wherein the unit is kg/car; />The number of transport devices required per unit area of polypropylene fabric, in car/m 2 ；/>Is the distance travelled by an empty wagon, and the unit is km; />Carbon emission per kilometer per ton for the total weight of the transport equipment, in kg/t/km; />The unit of the vehicle weight is kg/vehicle for the polypropylene fabric surface transportation equipment.
6. The method for predicting full life cycle carbon emissions of a horizontal barrier system of claim 4, wherein: and (3) a carbon emission quantum step a4 (3) for producing the bentonite waterproof blanket non-polypropylene fabric surface, wherein the carbon emission quantum step is calculated according to the following formula:(20) In (1) the->For producing carbon dioxide discharged from non-polypropylene fabric surface of bentonite waterproof blanket, kg/m 2 ；/>The weight of the polypropylene fabric required by the non-polypropylene fabric surface of the bentonite waterproof blanket per square meter is kg/m 2 ；/>Carbon emissions in kg/kg for producing a non-polypropylene fabric per kg;
the carbon emission of the transport bentonite waterproof blanket non-polypropylene fabric is considered as substep a4 (4), calculated according to the following formula:
（21）
in the method, in the process of the invention,kg/m of carbon dioxide discharged for transporting the non-polypropylene fabric surface of the bentonite waterproof blanket 2 ；/>Distance from the production site of the non-polypropylene fabric to the bentonite processing plant in km;>adding the weight of the bentonite waterproof blanket non-polypropylene fabric surface into transport equipment, wherein the unit is kg/car; />The number of transport devices required per unit area of polypropylene fabric, in car/m 2 ； />The unit of the vehicle weight is kg for the polypropylene fabric surface transport equipment.
7. The method for predicting the full life cycle carbon emission of a horizontal barrier system according to claim 1, wherein the carbon emission of the bentonite waterproof blanket transported per square meter to the barrier site in the step b is calculated according to the following formula:
（24）
in the method, in the process of the invention,the unit is km for transporting the bentonite waterproof blanket; />The total weight of the bentonite waterproof blanket fully loaded for the vehicle is kg/vehicle; />The number of trucks required for transporting the bentonite waterproof blanket per hectare is in units of cars/m 2 ；
The carbon emission per kilometer when the bentonite waterproof blanket is transported and run out is calculated according to the following formula:
（25）
in the method, in the process of the invention,the unit is km for the empty distance of the truck after the bentonite waterproof blanket is transported;
unloading the carbon emission of the bentonite waterproof blanket per square meter, and calculating according to the following formula:（26）
in the method, in the process of the invention,the working time required for unloading GCL per square meter for crane equipment is in h; ->For unloading the fuel consumption per hour of the plant, the unit is L/h.
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| CN202210555268.6A CN115034441B (en) | 2022-05-19 | 2022-05-19 | Method for predicting full life cycle carbon emission of horizontal barrier system |
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