A method and system for evaluating carbon ratio of building demolition disposal

Abstract

The present invention provides a method and system for evaluating the carbon ratio of building demolition disposal, which can ensure the comprehensiveness and accuracy of carbon emission calculations during building demolition disposal. By constructing a scientific carbon emission evaluation model, clarifying the calculation boundaries and carbon emission sources of demolition disposal, and setting carbon emission baseline values, the carbon emissions during demolition and disposal can be comprehensively evaluated. At the same time, the comprehensive performance score of recycled building materials can be combined to scientifically evaluate the application benefits and performance of recycled building materials, provide a scientific comparison basis for different projects, promote the resource utilization of construction waste, and promote the green and low-carbon development of the construction industry.

Description

Technical Field

[0001] The present invention belongs to the technical field of building energy conservation and emission reduction, and in particular relates to a method and system for evaluating the carbon ratio of building demolition disposal. Background Art

[0002] With the acceleration of urbanization and the gradual expiration of the service life of buildings, the demolition and disposal of buildings has become an important part of the high-quality development of cities. Building demolition and disposal is not only related to the treatment of construction waste and the recycling of resources, but also involves how to effectively reduce carbon emissions in the process, thereby achieving green, low-carbon and sustainable development.

[0003] Sections 7.1 and 7.2 of the China Urban Science Research Association group standard T / CSUS 60-2023 "Low-carbon Building Evaluation Standard" list demolition and disposal evaluation methods. Li Qiang et al.'s paper "Carbon Emission Model and Measurement Research in the Building Demolition and Treatment Stage, Construction Science and Technology, DOI: 10.16116 / j.cnki.jskj.2023.24.017" uses a teaching building in Huzhou as an example to calculate and analyze carbon emissions. The results show that carbon emissions from the building demolition process account for 22.5% of the carbon emissions in the entire building demolition and treatment stage, carbon emissions from the waste transportation process account for 28.7%, and carbon emissions from the waste disposal process account for 48.8%. In addition, Wang Ting's paper "Environmental Impact Assessment of Demolition Waste Treatment and Disposal Based on LCA [D]. Shenzhen University, 2016" sorted out the main components, proportions and typical treatment and disposal methods of demolished construction waste; then, based on the environmental impact characteristics of demolished construction waste, seven indicators including global warming, ozone layer depletion, acidification, eutrophication, and dust were selected for environmental impact assessment.

[0004] However, the above prior art generally has the following problems:

[0005] 1) The “Low-Carbon Building Evaluation Standard” provides a qualitative evaluation method for demolition disposal, but lacks quantitative analysis and evaluation.

[0006] 2) “Carbon emission model and measurement research in the building demolition and disposal stage” defines the demolition and disposal stage, but does not conduct quantitative evaluation research to compare the technology.

[0007] 3) “Environmental impact assessment of demolished construction waste treatment and disposal based on LCA” conducts quantitative research on the demolition and disposal environment, but only conducts quantitative research on the impact of demolished construction waste on the atmospheric environment.

[0008] It can be seen that the actual evaluation of the carbon ratio of building demolition disposal involves multiple links. Traditional carbon emission calculation methods often fail to fully cover all links, resulting in large deviations in the calculation results. In addition, the disposal process of building demolition waste is complicated, involving multiple links such as waste transportation, sorting, crushing, other treatment and recycling. These links not only affect carbon emissions, but also directly affect the quality and performance of recycled building materials. However, the existing evaluation methods mainly focus on single performance indicators of recycled building materials, such as compressive strength, tensile strength, etc., and lack a systematic evaluation of the comprehensive performance of recycled building materials during the disposal process. At the same time, the performance of recycled building materials has not been combined with their carbon emission benefits, making it difficult to fully evaluate the contribution of recycled building materials to carbon emissions.

[0009] Therefore, it is urgent to design a method and system for evaluating the carbon ratio of building demolition and disposal, so as to comprehensively evaluate the carbon ratio of building demolition and disposal, thereby improving the comprehensiveness and accuracy of the evaluation. Summary of the invention

[0010] 1. Technical issues to be resolved

[0011] The present invention provides a method and system for evaluating the carbon ratio of building demolition disposal, which can ensure the comprehensiveness and accuracy of carbon emission calculations during building demolition disposal. By constructing a scientific carbon emission evaluation model, clarifying the calculation boundary and carbon emission source of demolition disposal, and setting a carbon emission baseline value, the carbon emissions during demolition and disposal can be comprehensively evaluated. At the same time, the comprehensive performance score of recycled building materials can be combined to scientifically evaluate the application benefits and performance of recycled building materials, provide a scientific comparison basis for different projects, promote the resource utilization of construction waste, and promote the green and low-carbon development of the construction industry.

[0012] (II) Technical solution

[0013] The present invention discloses a method for evaluating the carbon ratio of building demolition disposal, comprising the following steps:

[0014] Step 1: Obtain the building demolition project files and create a case sample set of demolition building projects;

[0015] Step 2: According to the characteristics of the demolished building project, set the demolition disposal calculation boundary and carbon emission sources for the building demolition disposal carbon emission assessment;

[0016] Step 3: Based on the demolition disposal calculation boundary and carbon emission sources set in step 2, a building demolition carbon emission evaluation model is constructed, and based on the various indicator data of the demolition building project, the carbon emission value E of the building demolition project is calculated. demolition ;

[0017] Step 4: Based on the calculation boundary and carbon emission sources of the demolition and disposal carbon emission evaluation of the building demolition and disposal set in step 2, and based on the various indicator data of the demolition building project disposal process, calculate the carbon emission value E of the building disposal project processing ;

[0018] Step 5: Carbon emission value E of building demolition project calculated based on Steps 3 and 4 demolition and the carbon emission value E of the building disposal project processing , calculate the total carbon emissions from demolition and disposal E total :

[0019] E total =E demolition +E processing

[0020] Step 6: By testing the compressive strength, tensile strength, freeze-thaw resistance and permeability resistance of the recycled building materials from building demolition and disposal, and comparing them with the parameters of similar conventional building materials, the comprehensive performance score of different recycled building materials for buildings is obtained, and the comprehensive performance score S of the recycled building materials for building demolition and disposal is obtained. rec_total ;

[0021] Step 7: Calculate the baseline building demolition carbon emissions value based on the sample set of demolition project cases described in Step 1. avg_De , and calculate the carbon emission value of equivalent conventional building materials production base avg_PM , the two are added together to get the building demolition disposal baseline carbon ;

[0022] Step 8: Based on the total carbon emissions E of the dismantling and disposal described in Step 5 total , the comprehensive performance score S of the recycled building materials from building demolition and disposal described in step 6 rec_total and the building demolition disposal baseline described in step 7 carbon , calculate the building demolition disposal carbon ratio evaluation value Q, the calculation formula is as follows:

[0023]

[0024] Preferably, step 3, step 4, step 6 and step 7 also include the following sub-steps, which are not repeated here due to space limitations.

[0025] Preferably, step 8 further specifically includes the following steps: according to the score of the building demolition disposal carbon ratio evaluation value Q, the performance of building demolition disposal is divided into different levels: Q greater than 1.2 is excellent, 1.2≥Q≥1.1 is good, 1.1>Q≥1 is normal, 1>Q≥0.9 is poor, and 0.9>Q is unqualified.

[0026] Preferably, the case sample set of the building demolition project in step 1 includes more than 20 building demolition project files of similar buildings.

[0027] On the other hand, the present invention also discloses a building demolition carbon ratio evaluation system, comprising: at least one processor; and at least one memory communicatively connected to the processor, wherein: the memory stores program instructions that can be executed by the processor, and the processor calls the program instructions to execute any of the above-mentioned building demolition carbon ratio evaluation methods.

[0028] (III) Beneficial effects

[0029] Compared with the prior art, the building demolition disposal carbon ratio evaluation method and system provided by the present invention have the following beneficial effects:

[0030] (1) The carbon emission benchmark value and standardized assessment method proposed in this paper provide an important evaluation basis for carbon emissions in the demolition and disposal stages of the construction industry. Through statistical analysis of multiple case samples, standardized carbon emission benchmarks for the demolition and disposal processes of different building structures and scales are determined.

[0031] (2) The present invention optimizes the carbon-benefit ratio in the process of building demolition and disposal, and promotes the application and development of green and low-carbon technologies. By reducing energy consumption and resource waste, it not only reduces the environmental burden, but also improves the economic and social benefits of building waste resource utilization, and promotes the transformation of the construction industry towards sustainable development.

[0032] (3) The present invention comprehensively considers multiple performance indicators of recycled building materials, such as compressive strength, tensile strength, freeze-thaw resistance, and permeability resistance, and conducts scientific comparative evaluation with conventional building materials. By improving the comprehensive performance score of recycled building materials, the widespread application of recycled building materials is encouraged, effectively promoting the implementation of resource utilization of construction waste.

[0033] (4) The present invention uses a scientifically established carbon emission evaluation model to comprehensively evaluate the carbon emissions during the demolition and disposal of buildings. This not only helps to quantify the carbon emissions during the demolition and disposal process, but also accurately identifies and reduces the carbon footprint of carbon emission sources, such as equipment transportation, operation preparation, and waste treatment. By reducing the negative impact of construction waste on the environment, it promotes the development of the construction industry towards a low-carbon and environmentally friendly direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 It is the main flow chart of the building demolition disposal carbon ratio evaluation method provided by the present invention. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] In order to cover all aspects from demolition to disposal, including equipment transportation, operation, noise reduction, dust removal and waste treatment, and ensure the comprehensiveness and accuracy of carbon emission calculation, the present invention designs a method and system for evaluating the carbon ratio of building demolition and disposal, by constructing a scientific carbon emission evaluation model, clarifying the calculation boundary and carbon emission source of demolition and disposal, setting a carbon emission benchmark value, comprehensively evaluating the comprehensive performance of recycled building materials, scientifically evaluating the application benefits and performance of recycled building materials, and comprehensively evaluating the carbon ratio in the demolition and disposal process.

[0038] It should be pointed out that the concept of the performance-to-carbon ratio of the present invention comes from Qi Guanghua, a senior engineer at the "China's Low-Carbon Concrete Development Has a Long Way to Go - Notes on the Expert Symposium on Promoting the Development of Low-Carbon Concrete, 2021.11, Concrete World", which emphasizes the ratio of performance to carbon, thus reflecting the requirement of pursuing high performance in building demolition and disposal while pursuing low overall carbon emissions.

[0039] See also Figure 1 As shown, the building demolition disposal carbon ratio evaluation method of the present invention specifically includes the following steps:

[0040] Step 1: Obtain building demolition project files and create a case sample set of demolition building projects.

[0041] In another embodiment, the case sample set of the demolition building project in step 1 includes a plurality of building demolition project files of similar buildings, preferably more than 20 in number, so as to provide sufficient data for subsequent extraction of similar samples.

[0042] Step 2: According to the characteristics of the building demolition project, set the demolition disposal calculation boundary and carbon emission sources for the building demolition disposal carbon emission assessment.

[0043] In another embodiment, the demolition and disposal calculation boundary in step 2 refers to the spatial scope involved during the entire building demolition and disposal period, including but not limited to the activity scope such as the transportation route of construction waste generated during building demolition to the construction waste treatment station.

[0044] Step 3: Based on the demolition disposal calculation boundary and carbon emission sources set in step 2, a building demolition carbon emission evaluation model is constructed, and based on the various indicator data of the demolition building project, the carbon emission value E of the building demolition project is calculated. demolition .

[0045] In another embodiment, step 3 further specifically includes the following steps:

[0046] Step 3.1: The carbon emission value of the building demolition project includes the carbon emission of mechanical equipment transportation E transport , Mechanical operation preparation carbon emissions E preparation , Carbon emissions from mechanical equipment operation E mecanical 、On-site noise reduction and carbon emissions E noise_control and dust removal to control carbon emissions dust_control , build a building demolition carbon emission model, and obtain the carbon emission value E of the building demolition project demolition The calculation expression is:

[0047] E demolition =E transport +E preparation +E mecanical +E noise_control +E dust_control

[0048] Step 3.2: During the transportation of demolition equipment to the construction site, the carbon emissions from the transportation of mechanical equipment E transport The calculation formula is as follows:

[0049] E trabsport =EFE transport ×M transport ×D transport

[0050] Among them, EFE transport represents the carbon emission factor of transport vehicles (unit: kg CO2 / ton·km), M transport Indicates the weight of the transport equipment (unit: tons), D transport Indicates the distance the equipment is transported (unit: kilometers).

[0051] Step 3.3: Equipment operation preparation includes the equipment commissioning and testing process, which will also produce certain emissions, and the carbon emissions of mechanical operation preparation E preparation The calculation formula is as follows:

[0052] E preparation =EFE preparation ×M preparation ×T preparation

[0053] Among them, EFE preparation Indicates the carbon emission factor of the equipment preparation stage (unit: kg CO2 / kWh), M preparation Indicates the power of the equipment (unit: kW), T preparation Indicates the equipment debugging and testing time (unit: hours).

[0054] Step 3.4: Carbon emissions from mechanical equipment operation E mecanical The calculation formula is as follows:

[0055] E mecanical =∑(C i ×V i ×e i ×f e )

[0056] Among them, C i Indicates the amount of work completed by the equipment (unit: tons), V i Indicates equipment working efficiency (unit: hour / ton), e i Indicates the energy consumption of the equipment per hour (unit: liter / hour), f e Indicates the carbon emission factor per unit of energy (unit: kgCO2 / liter).

[0057] Step 3.5: In order to reduce the impact of construction noise on the environment, noise reduction equipment is required during the construction process. noise_control The calculation formula is as follows:

[0058] E noise_control =EFE noise_control ×P noise_control ×T noise_control

[0059] Among them, EFE noise_control Indicates the carbon emission factor of the noise reduction equipment (unit: kg CO2 / kWh), P noise_control Indicates the power of the noise reduction device (unit: kW), T noise_control Indicates the usage time of the noise reduction device (unit: hours).

[0060] Step 3.6: Dust removal equipment to control carbon emissions E dust_controlThe calculation formula is as follows:

[0061] E dust_control =EFE dust_control ×P dust_control ×T dust_control Among them, EFE dust_control Indicates the carbon emission factor of dust removal equipment (unit: kg CO2 / kWh), P dust_control Indicates the power of the dust removal equipment (unit: kW), T dust_control Indicates the usage time of the dust removal equipment (unit: hours).

[0062] It is worth mentioning that the present invention provides specific calculation formulas for various types of carbon emissions, such as equipment transportation carbon emissions, equipment operation preparation carbon emissions, mechanical equipment operation carbon emissions, noise reduction equipment carbon emissions and dust removal equipment carbon emissions. However, if there are other large carbon emission sources in the special case of the demolition process, other carbon emission values ​​can also be added to E demolition in the calculation expression of .

[0063] Step 4: Based on the calculation boundary and carbon emission sources of the demolition and disposal carbon emission evaluation of the building demolition and disposal set in step 2, and based on the various indicator data of the demolition building project disposal process, calculate the carbon emission value E of the building disposal project processing .

[0064] In another embodiment, step 4 further specifically includes the following steps:

[0065] Step 4.1: The carbon emission value of the building disposal project includes the carbon emission of construction solid waste transportation E transport_waste , Carbon emissions from the sorting process E sorting , Carbon emissions from the crushing process E crushing , Carbon emissions from other treatment processes E other_processing and carbon emissions from the operation of recycling equipment recycling_operation , construct the building disposal carbon emission model, and the calculation expression is:

[0066] E processing =E transport_waste +E sorting +E crushing +E other_processing +E rcycling_operation

[0067] Step 4.2: Carbon emissions from construction solid waste transportation E transport_waste The calculation formula is as follows:

[0068] E transport_waste =EFE transport_waste ×M transport_waste ×D transport_waste

[0069] Among them, EFE transport_waste represents the carbon emission factor of solid waste transport vehicles (unit: kg CO2 / ton·km), M transport_waste Indicates the weight of solid waste (unit: ton), D transport_waste Indicates the transportation distance of solid waste (unit: kilometers).

[0070] Step 4.3: Carbon emissions from the sorting process E sorting Calculated using the following formula:

[0071] E sorting =EFE sorting ×P sorting ×T sorting

[0072] Among them, EFE sorting Indicates the carbon emission factor of the sorting equipment (unit: kg CO2 / kWh), P sorting Indicates the power of the sorting equipment (unit: kW), T sorting Indicates the operating time of the sorting equipment (unit: hours).

[0073] Step 4.4: Carbon emissions from the crushing process E crushing Calculated using the following formula:

[0074] E crushing =EFE crusing ×P crusing ×T crusing

[0075] Among them, EFE crusing Indicates the carbon emission factor of the crushing equipment (unit: kg CO2 / kWh), P crusing Indicates the power of the crushing equipment (unit: kW), T crusing Indicates the operating time of the crushing equipment (unit: hours).

[0076] Step 4.5: Other processing processes include washing, drying and packaging. The equipment used in these processes will also consume electricity or fuel and produce carbon emissions. other_processing Calculated using the following formula:

[0077] E other_processing =EFE other ×P other ×T other

[0078] Among them, EFE other represents the carbon emission factor of other processing equipment (unit: kg CO2 / kWh), P other Indicates the power of other processing equipment (unit: kW), Tother Indicates the operating time of other processing equipment (unit: hour).

[0079] Step 4.6: Recover the carbon emissions E from equipment operation recycling_operation Calculated using the following formula:

[0080] E recycling_operation =EFE recycling_operation ×P recycling_operation ×T recycling_operation

[0081] Among them, EFE recycling_operation Indicates the carbon emission factor of the recycling equipment (unit: kg CO2 / kWh), P recycling_operation Indicates the power of the recovery equipment (unit: kW), T recycling_operation Indicates the operating time of the recycling equipment (unit: hours).

[0082] Step 5: Carbon emission value E of building demolition project calculated based on Steps 3 and 4 demolition and the carbon emission value E of the building disposal project processing , calculate the total carbon emissions from demolition and disposal E total The calculation formula is as follows:

[0083] E total =E demolition +E processing .

[0084] Step 6: By testing the compressive strength, tensile strength, freeze-thaw resistance and permeability resistance of the recycled building materials from building demolition and disposal, and comparing them with the parameters of similar conventional building materials, the comprehensive performance score of different recycled building materials for buildings is obtained, and the comprehensive performance score S of the recycled building materials for building demolition and disposal is obtained. rectotal .

[0085] In another embodiment, step 6 further specifically includes the following steps:

[0086] Step 6.1: Evaluation of compressive strength of recycled building materials σc,rec Calculated using the following formula:

[0087]

[0088] Among them, F rec Indicates the maximum load (N) when the recycled building material is destroyed, A rec Indicates the compressed area of ​​recycled building materials (mm 2 ), σ c,conv Indicates the compressive strength of similar building materials (MPa).

[0089] Step 6.2: Evaluation of tensile strength of recycled building materials σt,recCalculated using the following formula:

[0090]

[0091] Among them, F t,rec Indicates the maximum load (N) when the recycled building material is destroyed, A t,rec Indicates the compressed area of ​​recycled building materials (mm 2 ), σ t,conv Indicates the tensile strength (MPa) of similar building materials.

[0092] Step 6.3: Evaluation of freeze-thaw resistance of recycled building materials L,rec Calculated using the following formula:

[0093]

[0094] Among them, S 0,rec Indicates the initial strength of recycled building materials (MPa), S i,rec Indicates the strength of recycled building materials after freeze-thaw cycles (MPa), L conv Indicates the strength loss rate (%) of similar building materials.

[0095] Step 6.4: Evaluation of the permeability resistance of recycled building materials k,rec Calculated using the following formula:

[0096]

[0097] Among them, Q rec is the amount of water passing through the recycled building materials (m 3 ), L rec is the thickness of the recycled building material (m), A recP is the permeable area of ​​recycled building materials (m 2 ), ΔP rec is the pressure difference on both sides of the recycled building material (Pa), t rec is the penetration time (s).

[0098] Step 6.5: Assign weight coefficients to each property of recycled building materials to obtain the score S of each type of recycled building materials for building demolition and disposal. rec , and its calculation formula is as follows:

[0099] S rec =ω1×P σc，rec +ω2×P σt，rec +ω3×P L，rec +ω4×P k，rec

[0100] Among them, ω1, ω2, ω3 and ω4 are the weight coefficients of each performance, and their sum is zero. rec Credits are awarded for various types of recycled building materials disposed of from building demolition.

[0101] Step 6.6: Take the weight ratio of different types of recycled building materials produced as a coefficient to conduct a comprehensive performance evaluation of the demolished recycled building materials. The calculation formula is as follows:

[0102]

[0103] Among them, S rec_total S represents the comprehensive performance score of recycled building materials from building demolition and disposal. rec_i The score S of various types of recycled building materials for the i-th building demolition disposal rec .

[0104] Step 7: Calculate the baseline building demolition carbon emissions value based on the sample set of demolition project cases described in Step 1. avg_De , and calculate the carbon emission value of equivalent conventional building materials production base avg_PM , the two are added together to get the building demolition disposal baseline carbon .

[0105] In another embodiment, step 7 further specifically includes the following steps:

[0106] Step 7.1: Extract n case samples of demolished buildings with the same structure and similar building area as the demolished building to be evaluated, and obtain the benchmark building demolition carbon emission value base in the demolition stage avg_De The calculation formula is as follows:

[0107]

[0108] where base avg_De is the benchmark building demolition carbon emission value, which is used to evaluate the benchmark value of carbon emissions during the building demolition phase. i is the carbon emission value of the case sample, A i is the building area of ​​the case sample, and A is the demolished building area value to be evaluated.

[0109] Step 7.2: Calculate the carbon emission base of equivalent conventional building materials production avg_PM , and its calculation formula is as follows:

[0110]

[0111] Among them, base avg_PM is the total carbon emissions of the same conventional building materials production (in tons CO2e), EF j is the carbon emission factor of the jth building material (unit: tons CO2e / ton), Q j is the production weight of the j-th building material (in tons).

[0112] Step 7.3: Based on base avg_De and base avg_PM , calculate the baseline value of building demolition disposal carbon , the formula is as follows:

[0113] baseline carbon =base avg_Da +base avg_PM

[0114] Among them, baseline carbon It is the benchmark value for building demolition and disposal.

[0115] Step 8: Based on the total carbon emissions E of the dismantling and disposal described in Step 5 total , the comprehensive performance score S of the recycled building materials from building demolition and disposal described in step 6 rec_total and the building demolition disposal baseline described in step 7 carbon , calculate the building demolition disposal carbon ratio evaluation value Q, the calculation formula is as follows:

[0116]

[0117] In another embodiment, step 8 further specifically includes: according to the score of the building demolition disposal carbon ratio evaluation value Q, the performance of building demolition disposal is divided into different levels: Q greater than 1.2 is excellent, 1.2≥Q≥1.1 is good, 1.1>Q≥1 is normal, 1>Q≥0.9 is poor, and 0.9>Q is unqualified. It should be pointed out that the evaluation result classification standard (such as excellent, good, normal, poor, and unqualified) proposed in the present invention is a standardized processing of the calculation results. Although this classification method helps to intuitively understand the evaluation results, its essence is an application-level specification, and the segmentation of each standard can be adjusted according to actual conditions. In addition, E total and S rec_total It can also be used as a parameter to evaluate the performance and recycling benefits of building demolition disposal.

[0118] It can be seen that the present invention comprehensively evaluates the carbon emissions during the demolition and disposal of buildings by scientifically establishing a carbon emission evaluation model for building demolition, demolition disposal, and disposal of recycled building materials. This not only helps to quantify carbon emissions during the demolition and disposal process, but also accurately identifies and reduces carbon emission sources, such as the carbon footprint of equipment transportation, operation preparation, and waste treatment. By reducing the negative impact of construction waste on the environment, it promotes the development of the construction industry towards a low-carbon and environmentally friendly direction.

[0119] In summary, the building demolition disposal carbon ratio evaluation method of the present invention includes the following key innovative contents:

[0120] (1) The present invention provides a method for evaluating the carbon ratio of building demolition disposal, which comprehensively covers all carbon emission sources in the demolition disposal process. The model not only takes into account the transportation, operation preparation, operation, transportation, crushing and recycling of mechanical equipment, but also includes noise reduction, dust removal, sorting and cleaning, etc. This systematic model ensures the comprehensiveness and accuracy of the evaluation.

[0121] (2) The present invention introduces the carbon ratio as the evaluation basis, combines the carbon emissions from demolition and disposal with the performance benefits of recycled building materials, comprehensively evaluates the benefits of demolition and disposal, and provides a scientific comparison standard for different projects, providing a reference basis for the evaluation results.

[0122] (3) The present invention proposes a comprehensive consideration of multiple properties of recycled building materials, including compressive strength, tensile strength, freeze-thaw resistance and impermeability resistance, and compares them with conventional building materials that cannot be reused, thereby simplifying the differences between different recycled building materials, improving the accuracy of calculation and evaluation, and promoting the construction industry to develop in a low-carbon and environmentally friendly direction by reducing the negative impact of construction waste on the environment.

[0123] In several embodiments provided by the evaluation method of the present invention, the functional units in each step can be integrated into a controller processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units. The above-mentioned integrated unit implemented in the form of software functional units can be stored in a computer-readable storage medium. The above-mentioned software functional unit is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor (processor) to perform some steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), disk or optical disk and other media that can store program codes.

[0124] The present invention also discloses a building demolition carbon ratio evaluation system, comprising: at least one processor; and at least one memory communicatively connected to the processor, wherein: the memory stores program instructions executable by the processor, and the processor calls the program instructions to execute the building demolition carbon ratio evaluation method as described above.

[0125] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for evaluating the carbon ratio of building demolition disposal, characterized in that: The following steps are involved: Step 1: Obtain the building demolition project files and create a case sample set of demolition building projects; Step 2: According to the characteristics of the demolished building project, set the demolition disposal calculation boundary and carbon emission sources for the building demolition disposal carbon emission assessment; Step 3: Based on the demolition disposal calculation boundary and carbon emission sources set in step 2, a building demolition carbon emission evaluation model is constructed, and based on the various indicator data of the demolition building project, the carbon emission value E of the building demolition project is calculated. demolition ; Step 4: Based on the calculation boundary and carbon emission sources of the demolition and disposal carbon emission evaluation of the building demolition and disposal set in step 2, and based on the various indicator data of the demolition building project disposal process, calculate the carbon emission value E of the building disposal project processing ; Step 5: Carbon emission value E of building demolition project calculated based on Steps 3 and 4 demolition and the carbon emission value E of the building disposal project processing , calculate the total carbon emissions from demolition and disposal E total : AND total =And demolition +E processing Step 6: By testing the compressive strength, tensile strength, freeze-thaw resistance and permeability resistance of the recycled building materials from building demolition and disposal, and comparing them with the parameters of similar conventional building materials, the comprehensive performance score of different recycled building materials for buildings is obtained, and the comprehensive performance score S of the recycled building materials for building demolition and disposal is obtained. rec_total ; Step 7: Calculate the baseline building demolition carbon emissions value based on the sample set of demolition project cases described in Step 1. avg_De , and calculate the carbon emission value of equivalent conventional building materials production base avg_PM , the two are added together to get the building demolition disposal baseline carbon ; Step 8: Based on the total carbon emissions E of the dismantling and disposal described in Step 5 total , the comprehensive performance score S of the recycled building materials from building demolition and disposal described in step 6 rec_total and the building demolition disposal baseline described in step 7 carbon , calculate the building demolition disposal carbon ratio evaluation value Q, the calculation formula is as follows:

2. The method for evaluating the carbon ratio of building demolition disposal according to claim 1, characterized in that: Step 3 also specifically includes the following steps: Step 3.1: The carbon emission value of the building demolition project includes the carbon emission of mechanical equipment transportation E transport , Mechanical operation preparation carbon emissions E preparation , Carbon emissions from mechanical equipment operation E mecanical 、On-site noise reduction and carbon emissions E noise_control and dust removal to control carbon emissions dust_control , build a building demolition carbon emission model, and obtain the carbon emission value E of the building demolition project demolition The calculation expression is: AND demolition =And transport +E preparation +E mecanical +E noise_control +E dust_control 。 3. The building demolition disposal carbon ratio evaluation method according to claim 2, characterized in that: Step 3 also specifically includes the following steps: Step 3.2: During the transportation of demolition equipment to the construction site, the carbon emissions from the transportation of mechanical equipment E transpor The calculation formula of t is as follows: AND transport =EFE transport ×M transport ×D transport Among them, EFE transport represents the carbon emission factor of transport vehicles, M transport Indicates the weight of the transport equipment, D transport Indicates the distance the equipment is transported; Step 3.3: Equipment operation preparation includes the equipment commissioning and testing process to obtain the mechanical operation preparation carbon emissions E preparation The calculation formula is as follows: AND preparation =EFE preparation ×M preparation ×T preparation Among them, EFE preparation Represents the carbon emission factor in the equipment preparation stage, M preparation Indicates the power of the device, T preparation Indicates the equipment debugging and testing time; Step 3.4: Carbon emissions from mechanical equipment operation E mecanical The calculation formula is as follows: AND mecanical =∑(C i ×V i ×e i ×f e ) Among them, C i Indicates the amount of work done by the device, V i Indicates the equipment working efficiency, e i represents the energy consumption of the equipment per hour, f e Indicates the carbon emission factor per unit of energy; Step 3.5: On-site noise reduction carbon emissions E noise_control The calculation formula is as follows: AND noise_control =EFE noise_control ×P noise_control ×T noise_control Among them, EFE noise_control represents the carbon emission factor of the noise reduction equipment, P noise_control Indicates the power of the noise reduction device, T noise_control Indicates the usage time of the noise reduction device; Step 3.6: Dust removal equipment to control carbon emissions E dust_control The calculation formula is as follows: AND dust_control =EFE dust_control ×P dust_control ×T dust_control Among them, EFE dust_control Represents the carbon emission factor of dust removal equipment, P dust_control Indicates the power of the dust removal equipment, T dust_control Indicates the usage time of the dust removal equipment.

4. The method for evaluating the carbon ratio of building demolition disposal according to claim 1, characterized in that: Step 4 also specifically includes the following steps: Step 4.1: The carbon emission value of the building disposal project includes the carbon emission of construction solid waste transportation E transport_waste , Carbon emissions from the sorting process E sorting , Carbon emissions from the crushing process E crushing , Carbon emissions from other treatment processes E other_processing and carbon emissions from the operation of recycling equipment recycling_operation , construct the building disposal carbon emission model, and the calculation expression is: AND processing =And transport_waste +E sorting +E crushing +E other_processing +E recycling_operation 。 5. The method for evaluating the carbon ratio of building demolition disposal according to claim 4, characterized in that: Step 4 also specifically includes the following steps: Step 4.2: Carbon emissions from construction solid waste transportation E transport_waste The calculation formula is as follows: AND transport_waste =EFE transport_waste ×M transport_waste ×D transport_waste Among them, EFE transport_waste represents the carbon emission factor of solid waste transport vehicles, M transport_waste Indicates the weight of solid waste, D transport_waste Indicates the transportation distance of solid waste; Step 4.3: Carbon emissions from the sorting process E sorting Calculated using the following formula: AND sorting =EFE sorting ×P sorting ×T sorting Among them, EFE sorting represents the carbon emission factor of the sorting equipment, P sorting Indicates the power of the sorting equipment, T sorting Indicates the operating time of the sorting equipment; Step 4.4: Carbon emissions from the crushing process E crushing Calculated using the following formula: AND crushing =EFE crusing ×P crusing ×T crusing Among them, EFE crusing represents the carbon emission factor of the crushing equipment, P crising Indicates the power of the crushing equipment, T crusing Indicates the operating time of the crushing equipment; Step 4.5: Carbon emissions from other processes E other_processing Calculated using the following formula: AND other_processing =EFE other ×P other ×T other Among them, EFE other represents the carbon emission factor of other processing equipment, P other Represents the power of other processing equipment, T other Indicates the running time of other processing equipment; Step 4.6: Recover the carbon emissions E from equipment operation recycling_operation Calculated using the following formula: AND recycling_operation =EFE recycling_operation ×P recycling_operation ×T recycling_operation EFE recycling_operation represents the carbon emission factor of the recycling equipment, P recycling_operation Indicates the power of the recovery equipment, T recycling_operation Indicates the operating time of the recycling equipment.

6. The method for evaluating the carbon ratio of building demolition disposal according to claim 1, characterized in that: Step 6 also specifically includes the following steps: Step 6.1: Evaluation of compressive strength of recycled building materials σc,rec Calculated using the following formula: Among them, F rec Indicates the maximum load when the recycled building material is destroyed, A rec represents the compressed area of ​​recycled building materials, σ c,conv Indicates the compressive strength of similar building materials; Step 6.2: Evaluation of tensile strength of recycled building materials σt,rec Calculated using the following formula: Among them, F t,rec Indicates the maximum load when the recycled building material is destroyed, A t，rec represents the compressed area of ​​recycled building materials, σ t，conv Indicates the tensile strength of similar building materials; Step 6.3: Evaluation of freeze-thaw resistance of recycled building materials L，rec Calculated using the following formula: Among them, S 0,rec Indicates the initial strength of recycled building materials, S i,rec Indicates the strength of recycled building materials after freeze-thaw cycles, L conv Indicates the strength loss rate (%) of similar building materials; Step 6.4: Evaluation of the permeability resistance of recycled building materials k,rec Calculated using the following formula: Among them, Q rec is the amount of water passing through the recycled building materials, L rec is the thickness of the recycled building material, A recP is the penetration area of ​​recycled building materials, ΔP rec is the pressure difference on both sides of the recycled building material, t rec is the penetration time; Step 6.5: Assign weight coefficients to each property of recycled building materials to obtain the score S of each type of recycled building materials for building demolition and disposal. rec , and its calculation formula is as follows: S rec =ω1×P σc，rec +ω2×P σt，rec +ω3×P L，rec +ω4×P k，rec Among them, ω1, ω2, ω3 and ω4 are the weight coefficients of each performance, and their sum is zero. rec Points are awarded for various types of recycled building materials disposed of from building demolition; Step 6.6: Take the weight ratio of different types of recycled building materials produced as a coefficient to conduct a comprehensive performance evaluation of the demolished recycled building materials. The calculation formula is as follows: Among them, S rec_total S represents the comprehensive performance score of recycled building materials from building demolition and disposal. rec_i The score S of various types of recycled building materials for the i-th building demolition disposal rec .

7. The method for evaluating the carbon ratio of building demolition disposal according to claim 1, characterized in that: Step 7 also specifically includes the following steps: Step 7.1: Extract n case samples of demolished buildings with the same structure and similar building area as the demolished building to be evaluated, and obtain the benchmark building demolition carbon emission value base in the demolition stage avg_De The calculation formula is as follows: where base avg_De is the benchmark building demolition carbon emission value, which is used to evaluate the benchmark value of carbon emissions during the building demolition phase. i is the carbon emission value of the case sample, A i is the building area of ​​the case sample, and A is the demolished building area value to be evaluated; Step 7.2: Calculate the carbon emission base of equivalent conventional building materials production avg_PM , and its calculation formula is as follows: Among them, base avg_PM is the total carbon emissions of the production of equivalent conventional building materials, EF j is the carbon emission factor of the jth building material, Q j is the production weight of the jth building material; Step 7.3: Based on base avg_De and base avg_PM , calculate the baseline value of building demolition disposal carbon , the formula is as follows: baseline carbon =base avg_De +base avg_PM Among them, baseline carbon It is the benchmark value for building demolition and disposal.

8. The method for evaluating the carbon ratio of building demolition disposal according to claim 1, characterized in that: Step 8 also specifically includes the following steps: according to the score of the building demolition disposal carbon ratio evaluation value Q, the performance of building demolition disposal is divided into different levels: Q greater than 1.2 is excellent, 1.2≥Q≥1.1 is good, 1.1>Q≥1 is normal, 1>Q≥0.9 is poor, and 0.9>Q is unqualified.

9. The method for evaluating the carbon ratio of building demolition disposal according to claim 7, characterized in that: The case sample set of the demolition building project in step 1 includes more than 20 building demolition project files of similar buildings.

10. A building demolition disposal carbon ratio evaluation system, characterized in that: include: at least one processor; And at least one memory communicatively connected to the processor, wherein: the memory stores program instructions executable by the processor, and the processor calls the program instructions to execute the building demolition disposal carbon ratio evaluation method described in any one of claims 1-9.

Images