Carbon sequestration and emission reduction benefit accounting method for waste biomass low-carbon concrete

Abstract

The invention relates to the technical field of environmental evaluation, and discloses a waste biomass low-carbon concrete carbon sequestration emission reduction benefit accounting method, which comprises the following steps: S1, determining waste biomass raw materials and pyrolysis key process technological parameters, and accounting the carbon emission in the pyrolysis treatment process; s2, according to the physicochemical properties of the waste biomass, determining the pretreatment operation of the waste biomass pyrolytic carbon, and accounting the carbon emission in the key energy consumption process of the pretreatment of the waste biomass pyrolytic carbon; s3, determining the equivalent substitution percentage of the waste biomass pyrolytic carbon in the low-carbon concrete and the carbon content percentage of the waste biomass pyrolytic carbon, and calculating the carbon reduction amount of the waste biomass low-carbon concrete for saving building materials and the carbon fixation amount of the waste biomass pyrolytic carbon; s4, determining the service life of the waste biomass low-carbon concrete under the damage effect of the use environment, and calculating the indirect emission reduction of the increase of the service life of the waste biomass low-carbon concrete; s5, checking the carbon sequestration and emission reduction benefits of the waste biomass low-carbon concrete; the scheme is accurate in accounting.

Description

Technical Field

[0001] The present invention relates to the technical field of environmental assessment, and in particular to a method for calculating the carbon sequestration and emission reduction benefits of waste biomass low-carbon concrete. Background Art

[0002] Since the Industrial Revolution, greenhouse gas emissions from human activities have gradually become the main driver of global climate change. Among them, the construction industry, as an important part of the global economy, has a particularly significant impact on the environment. In particular, concrete, the most used building material in history, not only supports the infrastructure construction of modern society, but also has become a typical resource and energy-bearing industry. It is estimated that carbon emissions in the concrete production process account for about 5%-7% of the global total, which makes the development space of energy conservation and carbon reduction in this field huge, and also highlights the importance of finding effective emission reduction paths.

[0003] In the process of exploring low-carbon building materials, biomass has entered people's field of vision as a zero-carbon renewable energy produced by photosynthesis. Biomass comes from a wide range of sources, mainly including waste generated by agriculture, industry, animal husbandry and urban activities. By treating these wastes with high-temperature anaerobic pyrolysis technology, most of the carbon in the biomass can be fixed in solid waste, the so-called "pyrolytic carbon". This material not only has potential volcanic ash activity and stable chemical properties, but also has a large specific surface area, making it an excellent additive. When used in concrete preparation, biomass pyrolytic carbon can improve the microstructure of concrete, enhance its mechanical properties and improve durability. This not only helps to realize the resource utilization of waste, but more importantly, it provides new possibilities for the low-carbon transformation of the concrete industry.

[0004] As the national carbon trading market gradually deepens, the industry coverage of the carbon market is expanding. As a market mechanism, carbon trading aims to guide enterprises to reduce carbon emissions through price signals, thereby promoting green technology innovation and sustainable development. However, in the field of waste biomass low-carbon concrete, despite its inherent carbon sequestration and emission reduction benefits, there is currently a lack of an accurate accounting method to measure these benefits. Summary of the invention

[0005] The present invention aims to provide a method for calculating the carbon sequestration and emission reduction benefits of waste biomass low-carbon concrete, aiming to improve the accuracy of the calculation.

[0006] To achieve the above object, the present invention adopts the following technical solution: a method for calculating the carbon sequestration and emission reduction benefits of waste biomass low-carbon concrete, comprising the following steps:

[0007] S1: Determine the key process parameters of waste biomass raw materials and pyrolysis, and calculate the carbon emissions of the pyrolysis process;

[0008] S2: Determine the pretreatment operation of waste biomass pyrolysis carbon according to the physical and chemical properties of waste biomass, and calculate the carbon emissions of key energy-consuming processes in the pretreatment of waste biomass pyrolysis carbon;

[0009] S3: Determine the equivalent replacement percentage of waste biomass pyrolytic carbon in low-carbon concrete and the carbon content percentage of waste biomass pyrolytic carbon, and calculate the carbon reduction amount of building materials saved by waste biomass low-carbon concrete and the carbon fixation amount of waste biomass pyrolytic carbon;

[0010] S4: Determine the service life of waste biomass low-carbon concrete under the influence of environmental damage, and calculate the indirect emission reduction due to the increase in the service life of waste biomass low-carbon concrete;

[0011] S5: Calculate the carbon sequestration and emission reduction benefits of waste biomass low-carbon concrete.

[0012] Preferably, as an improvement, in step S3, the equivalent replacement percentage of waste biomass pyrolysis carbon in low-carbon concrete is 2% or less of the mass of concrete.

[0013] Preferably, as an improvement, in step S1, the biomass raw material is at least one of straw, sawdust, rice husk, peanut shell, coconut shell, bamboo, pig manure, cow dung, kitchen waste and sludge, and the pyrolysis temperature is 450-600°C.

[0014] Preferably, as an improvement, in step S1, the carbon emissions from the pyrolysis process include the sum of carbon emissions from electricity consumption, fossil fuel combustion and pyrolysis gas emissions, and the carbon emissions from the pyrolysis process are calculated according to the following formula:

[0015]

[0016] Where P r EF is the carbon emission during the pyrolysis process, in tons of carbon dioxide (tCO2); pr The power input of the pyrolysis process is in megawatt-hours (MWh); K p The power supply carbon dioxide emission intensity of the production area released by the Ministry of Ecology and Environment, in tons of carbon dioxide per megawatt-hour (tCO2 / MWh); FE i FEF is the activity level of the i-th fossil energy in the pyrolysis process, in GJ; i is the carbon dioxide emission intensity of the i-th fossil energy in the pyrolysis process, in tons of carbon dioxide per gigajoules (tCO2 / GJ); GH i is the emission of the i-th greenhouse gas in pyrolysis gas, in tons (t); NC i is the carbon dioxide emission intensity of the ith greenhouse gas, in tons of carbon dioxide per ton (tCO2 / t).

[0017] Preferably, as an improvement, in step S2, the waste biomass pyrolysis carbon pretreatment scheme includes one or more of drying, grinding, surface modification, etc., and the carbon dioxide emissions of the key energy-consuming process of waste biomass pyrolysis carbon pretreatment are calculated according to the following formula:

[0018]

[0019] In the formula, E pt AD is the carbon emission of the key energy-consuming process of waste biomass pyrolysis charcoal pretreatment, in tons of carbon dioxide (tCO2); i is the power input of the i-th step pretreatment process, in megawatt-hours (MWh); K p It is the power supply carbon dioxide emission intensity of the production area published by the Ministry of Ecology and Environment, in tons of carbon dioxide per megawatt-hour (tCO2 / MWh).

[0020] Preferably, as an improvement, in step S3, the carbon reduction amount of building materials saved by waste biomass low-carbon concrete is calculated according to the following formula:

[0021] P c =α×M con ×K c

[0022] Where P c is the carbon reduction of building materials saved by waste biomass low-carbon concrete, in tons of carbon dioxide (tCO2); α is the equivalent replacement percentage of waste biomass pyrolysis carbon in concrete; M con is the mass of low carbon concrete, in tons (t); K c The carbon dioxide emission intensity corresponding to the saving of building materials is measured in tons of carbon dioxide per ton (tCO2 / t).

[0023] Preferably, as an improvement, in step S3, the carbon fixation amount of the waste biomass pyrolysis charcoal is calculated according to the following formula:

[0024]

[0025] Where P b is the carbon fixation amount of waste biomass pyrolysis carbon, in tons of carbon dioxide (tCO2); α is the equivalent replacement percentage of waste biomass pyrolysis carbon in concrete; M con is the mass of low carbon concrete, in tons (t); W b It is the carbon content percentage of biomass pyrolysis char.

[0026] Preferably, as an improvement, in step S4, the destructive effects of the waste biomass low-carbon concrete in the use environment include single or multiple coupling effects such as carbonization, freeze-thaw, weathering, alkali-aggregate reaction, chloride ion corrosion, etc.

[0027] Preferably, as an improvement, the service life increase of the waste biomass low-carbon concrete is estimated from the time required from the start of destruction to the end of destruction, and the indirect emission reduction amount of the service life increase of the concrete in step S4 is calculated according to the following formula:

[0028]

[0029] Where P l is the indirect emission reduction due to the increase in the service life of waste biomass low-carbon concrete, in tons of carbon dioxide (tCO2); Δt b Δt is the time required for concrete without waste biomass to be damaged from the beginning to the end under single or multi-coupled damage; c M is the time required for waste biomass low-carbon concrete from the beginning to the end of destruction in a single or multi-coupled destruction environment; con is the mass of low carbon concrete, in tons (t); K con It is the carbon dioxide emission intensity corresponding to concrete of different strength grades, in tons of carbon dioxide per ton (tCO2 / t).

[0030] Preferably, as an improvement, in step S5, the carbon sequestration and emission reduction benefits of the waste biomass low-carbon concrete are calculated according to the following formula:

[0031] P=P c +P b +P l -P r -E pt

[0032] Where P is the carbon sequestration and emission reduction benefit of waste biomass low-carbon concrete, expressed in tons of carbon dioxide (tCO2); P c Carbon reduction of building materials saved for waste biomass low-carbon concrete; b is the carbon fixation amount of waste biomass pyrolysis char; P l The indirect emission reduction due to the increase in the service life of waste biomass low-carbon concrete; r is the carbon emission during pyrolysis; E pt Carbon emissions from key energy-consuming processes in waste biomass pyrolysis charcoal pretreatment.

[0033] The principle and beneficial effect of this technical solution are: the present invention calculates the carbon fixation and emission reduction benefits of waste biomass low-carbon concrete in groups. In addition to calculating the carbon fixation and emission reduction benefits in raw material production and product manufacturing, it also calculates the emission reduction benefits brought about by the extension of the service life of waste biomass low-carbon concrete under single or multi-coupled destructive effects, and takes into account the carbon fixation and emission reduction at the same time, including: the carbon fixation of waste biomass pyrolysis carbon itself; the carbon reduction of building materials saved by waste biomass pyrolysis carbon, and the emission reduction brought about by the extension of service life, and the operation is simple and the calculation results are highly accurate. At the same time, the present invention is applicable to waste biomass raw materials of various sources and components, has a wide range of applications, and is of great significance to the realization of waste resource utilization and low-carbon development of concrete.

[0034] In summary, the beneficial effects of this technical solution are: this technical solution takes into account the carbon sequestration and emission reduction in the entire life cycle process from the production of raw materials, production of waste biomass low-carbon concrete, transportation, and service life; it is not only based on basic data such as energy consumption and building material emission factors, but also more accurately based on the physical and chemical properties of raw materials, raw material production parameters, and the mechanics and durability of waste biomass low-carbon concrete to calculate the benefits of carbon sequestration and emission reduction, thereby improving the accuracy and comprehensiveness of the calculation. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a flow chart of the process of the method for calculating the carbon sequestration and emission reduction benefits of waste biomass low-carbon concrete in an embodiment of the present invention.

[0036] Figure 2 This is a data graph showing the effect of the equivalent replacement percentage of pyrolysis carbon of municipal solid waste obtained in an embodiment of the present invention on the mechanical properties of low-carbon concrete. DETAILED DESCRIPTION

[0037] The following is further described in detail through specific implementation methods, but the implementation methods of the present invention are not limited thereto. Unless otherwise specified, the technical means used in the following implementation methods are conventional means well known to those skilled in the art; the experimental methods used are all conventional methods; the materials, reagents, etc. used can all be obtained from commercial channels; obviously, the present invention has many different implementation forms, and the described embodiments are only part of the embodiments of the present invention, not all of them.

[0038] Example 1

[0039] The present invention provides a method for calculating the carbon sequestration and emission reduction benefits of waste biomass low-carbon concrete, and the specific steps include:

[0040] S1: Determine that the waste biomass pyrolysis raw material is urban domestic waste, determine that the pyrolysis temperature is 600℃, and calculate the carbon emissions during the pyrolysis process according to the following formula:

[0041]

[0042] Where P r is the carbon emission during the pyrolysis process, in tons of carbon dioxide (tCO2); EF pr The power input of the pyrolysis process is in megawatt-hours (MWh); K p The power supply carbon dioxide emission intensity of the production area published by the Ministry of Ecology and Environment, in tons of carbon dioxide per megawatt-hour (tCO2 / MWh); FE i is the activity level of the i-th fossil energy in the pyrolysis process, in GJ; FEF i is the carbon dioxide emission intensity of the i-th fossil energy in the pyrolysis process, in tons of carbon dioxide per gigajoules (tCO2 / GJ); GH i is the emission of the i-th greenhouse gas in pyrolysis gas, in tons (t); NC i is the carbon dioxide emission intensity of the ith greenhouse gas, expressed in tons of carbon dioxide per ton (tCO2 / t). The recommended value in Table 1 can be used.

[0043] Table 1 Recommended values ​​of greenhouse gas carbon dioxide emission intensity of pyrolysis gas

[0044] Greenhouse gas name Chemical formula <![CDATA[Carbon dioxide emission intensity (tCO2 / MWh)]]> carbon dioxide <![CDATA[CO2]]> 1 Methane <![CDATA[CH4]]> 25 Nitrous oxide <![CDATA[N2O]]> 298

[0045] S2: Based on the physical and chemical properties of municipal solid waste pyrolysis carbon, its pretreatment operations are determined to be drying and grinding. The carbon dioxide emissions from the key energy-consuming processes of waste biomass pyrolysis carbon pretreatment are calculated according to the following formula:

[0046]

[0047] In the formula, E pt It is the carbon emission of key energy-consuming processes in the pyrolysis carbon pretreatment of municipal solid waste, in tons of carbon dioxide (tCO2); AD i is the power input of the drying and grinding pretreatment process, in megawatt-hours (MWh); K p It is the power supply carbon dioxide emission intensity of the production area published by the Ministry of Ecology and Environment, in tons of carbon dioxide per megawatt-hour (tCO2 / MWh).

[0048] S3: The equivalent replacement percentage of municipal solid waste pyrolysis carbon in concrete is determined to be 1.8%. The experimental results are shown in Figure 2 The carbon content of waste biomass pyrolysis carbon is determined to be 38%, and the experimental results are shown in Table 2. The carbon reduction amount of waste biomass low-carbon concrete saving building materials and the carbon fixation amount of waste biomass pyrolysis carbon are calculated.

[0049] Table 2 Chemical element content of pyrolysis carbon of municipal solid waste (%)

[0050] C O Ca Si Fe Al Mg K Ti Zn 38.0 37.1 9.5 5.5 4.2 2.0 0.6 0.5 0.4 0.3

[0051] In this embodiment, the equivalent substitute material of the pyrolytic carbon of municipal solid waste in concrete is cement, and the carbon reduction amount of the saved building materials is calculated according to the following formula:

[0052] P c =α×M con ×K c

[0053] Where P c The carbon reduction amount for saving building materials is expressed in tons of carbon dioxide (tCO2); α is the equivalent replacement percentage of waste biomass pyrolysis carbon in concrete, which is calculated as 1.8% in this embodiment; M con is the mass of low carbon concrete, in tons (t); K c is the carbon dioxide emission intensity corresponding to cement, with the unit of tons of carbon dioxide per ton (tCO2 / t). This embodiment is calculated as 0.88.

[0054] The carbon fixation of waste biomass pyrolysis charcoal is calculated according to the following formula:

[0055]

[0056] Where P b is the carbon fixation amount of waste biomass pyrolysis carbon, in tons of carbon dioxide (tCO2); α is the replacement percentage of waste biomass pyrolysis carbon in concrete, which is calculated as 1.8% in this embodiment; M con is the mass of low carbon concrete, in tons (t); W b is the mass percentage of carbon element in biomass pyrolysis charcoal, which is calculated as 38% in this embodiment.

[0057] S4: The destructive effect of pyrolytic carbon concrete of municipal solid waste in the use environment is single freeze-thaw damage. The loss of compressive strength of concrete after freezing does not exceed 5% of the design strength. The indirect emission reduction due to the increase in the service life of concrete is calculated according to the following formula:

[0058]

[0059] Where P l is the indirect emission reduction due to the increase in the service life of waste biomass low-carbon concrete, in tons of carbon dioxide (tCO2); Δt b The number of freeze-thaw cycles required for ordinary concrete to lose more than 5% of its design strength in a single freeze-thaw environment; Δt c The number of freeze-thaw cycles required for the waste biomass low-carbon concrete to lose more than 5% of its design strength in a single freeze-thaw environment; Mcon is the mass of low carbon concrete, in tons (t); K con It is the carbon dioxide emission intensity corresponding to concrete of different strength grades, in tons of carbon dioxide per ton (tCO2 / t).

[0060] S5: Based on the above data, the carbon sequestration and emission reduction benefits of waste biomass low-carbon concrete are calculated according to the following formula:

[0061] P=P c +P b +P l -PE pt

[0062] Where P is the carbon sequestration and emission reduction benefit of waste biomass low-carbon concrete, expressed in tons of carbon dioxide (tCO2); P c Carbon reduction of building materials saved for waste biomass low-carbon concrete; b is the carbon fixation amount of waste biomass pyrolysis char; P l The indirect emission reduction due to the increase in the service life of waste biomass low-carbon concrete; r is the carbon emission during pyrolysis; E pt Carbon emissions from key energy-consuming processes in waste biomass pyrolysis charcoal pretreatment.

[0063] Example 2

[0064] Example 2 is basically the same as Example 1, but differs from Example 1 in that: in Example 2, the waste biomass raw material is rice husk, the pyrolysis temperature is 450°C, and the chemical element content of the waste rice husk pyrolysis charcoal is shown in Table 3.

[0065] Table 3 Chemical element content of waste rice husk pyrolysis carbon (%)

[0066] C H N Ca Mg Si Fe 41.0 2.1 0.7 0.1 0.1 19.2 0.61

[0067] Example 3

[0068] Example 3 is basically the same as Example 1, but the difference from Example 1 is that in Example 3, the destructive effect of the waste biomass pyrolytic carbon concrete is carbonization-freeze-thaw coupling effect. Considering the change of relative dynamic elastic modulus, the expected life of the waste biomass pyrolytic carbon concrete is calculated according to the following formula:

[0069]

[0070] Where ε is the decay coefficient, f o is the initial dynamic elastic modulus, f t is the attenuated dynamic elastic modulus after carbonization and freeze-thaw coupling damage, and θ is the influence coefficient.

[0071] The indirect emission reduction due to the increase in concrete service life is calculated according to the following formula:

[0072]

[0073] Where P l is the indirect emission reduction due to the increase in the service life of waste biomass pyrolysis carbon concrete, in tons of carbon dioxide (tCO2); Δt b is the expected life of waste biomass pyrolysis carbon concrete under carbonization-freeze-thaw coupling damage; Δt c is the expected design life of ordinary concrete; M con is the mass of low carbon concrete, in tons (t); K con It is the carbon dioxide emission intensity corresponding to concrete of different strength grades, in tons of carbon dioxide per ton (tCO2 / t).

[0074] Experimental Example 1: Relationship between the equivalent replacement amount of pyrolytic carbon of municipal solid waste in concrete and concrete strength

[0075] On the basis of Example 1, the equivalent replacement percentage of municipal solid waste pyrolysis carbon in concrete was set to 0-5.4%, and then the compressive strength and flexural strength of the concrete were tested respectively. The test method was based on the "Standard for Test Methods of Mechanical Properties of Ordinary Concrete" (GB / T 50081-2002). The test results are as follows: Figure 2 As shown, the results show that the equivalent replacement percentage of pyrolytic carbon of municipal solid waste in concrete is nonlinearly related to the mechanical properties of concrete. When the equivalent replacement percentage of pyrolytic carbon of municipal solid waste in concrete is ≤1.8%, the compressive strength and flexural strength of concrete can basically be taken into account.

[0076] The present invention and its implementation methods are described above, which is not restrictive and is only one of the implementation methods of the present invention. The actual implementation methods are not limited thereto. In short, if ordinary technicians in the field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention, they should all fall within the protection scope of the present invention.

Claims

1. A method for calculating the carbon sequestration and emission reduction benefits of waste biomass low-carbon concrete, characterized in that: The steps include: S1: Determine the key process parameters of waste biomass raw materials and pyrolysis, and calculate the carbon emissions of the pyrolysis process; S2: Determine the pretreatment operation of waste biomass pyrolysis carbon according to the physical and chemical properties of waste biomass, and calculate the carbon emissions of key energy-consuming processes in the pretreatment of waste biomass pyrolysis carbon; S3: Determine the equivalent replacement percentage of waste biomass pyrolytic carbon in low-carbon concrete and the carbon content percentage of waste biomass pyrolytic carbon, and calculate the carbon reduction amount of building materials saved by waste biomass low-carbon concrete and the carbon fixation amount of waste biomass pyrolytic carbon; S4: Determine the service life of waste biomass low-carbon concrete under the influence of environmental damage, and calculate the indirect emission reduction due to the increase in the service life of waste biomass low-carbon concrete; S5: Calculate the carbon sequestration and emission reduction benefits of waste biomass low-carbon concrete.

2. The method for calculating the carbon sequestration and emission reduction benefits of waste biomass low-carbon concrete according to claim 1, characterized in that: In step S3, the equivalent replacement percentage of waste biomass pyrolysis carbon in low-carbon concrete is 2% or less of the mass of concrete.

3. The method for calculating the carbon sequestration and emission reduction benefits of waste biomass low-carbon concrete according to claim 2, characterized in that: In step S1, the biomass raw material is at least one of straw, sawdust, rice husk, peanut shell, coconut shell, bamboo, pig manure, cow dung, kitchen waste and sludge, and the pyrolysis temperature is 450-600°C.

4. The method for calculating the carbon sequestration and emission reduction benefits of waste biomass low-carbon concrete according to claim 3 is characterized by: In step S1, the carbon emissions from the pyrolysis process include the sum of carbon emissions from electricity consumption, fossil fuel combustion and pyrolysis gas emissions. The carbon emissions from the pyrolysis process are calculated according to the following formula: Where P r is the carbon emission during the pyrolysis process, in tons of carbon dioxide (tCO2); EF Pr The power input of the pyrolysis process is in megawatt-hours (MWh); K p The power supply carbon dioxide emission intensity of the production area published by the Ministry of Ecology and Environment, in tons of carbon dioxide per megawatt-hour (tCO2 / MWh); FE i is the activity level of the i-th fossil energy in the pyrolysis process, in GJ; FEF i is the carbon dioxide emission intensity of the i-th fossil energy in the pyrolysis process, in tons of carbon dioxide per gigajoules (tCO2 / GJ); GH i is the emission of the i-th greenhouse gas in pyrolysis gas, in tons (t); NC i is the carbon dioxide emission intensity of the ith greenhouse gas, in tons of carbon dioxide per ton (tCO2 / t).

5. The method for calculating the carbon sequestration and emission reduction benefits of waste biomass low-carbon concrete according to claim 4, characterized in that: In step S2, the waste biomass pyrolysis carbon pretreatment scheme includes one or more of drying, grinding, and surface modification. The carbon dioxide emissions from the key energy-consuming processes of the waste biomass pyrolysis carbon pretreatment are calculated according to the following formula: In the formula, E Pt It is the carbon emission of key energy-consuming processes in the pyrolysis carbon pretreatment of municipal solid waste, in tons of carbon dioxide (tCO2); AD i is the power input of the drying and grinding pretreatment process, in megawatt-hours (MWh); K p It is the power supply carbon dioxide emission intensity of the production area published by the Ministry of Ecology and Environment, in tons of carbon dioxide per megawatt-hour (tCO2 / MWh).

6. The method for calculating the carbon sequestration and emission reduction benefits of waste biomass low-carbon concrete according to claim 5, characterized in that: In step S3, the carbon reduction amount of building materials saved by waste biomass low-carbon concrete is calculated according to the following formula: P c =α×M con ×K c Where P c is the carbon reduction of building materials saved by waste biomass low-carbon concrete, in tons of carbon dioxide (tCO2); α is the equivalent replacement percentage of waste biomass pyrolysis carbon in concrete; M con is the mass of low carbon concrete, in tons (t); K c The carbon dioxide emission intensity corresponding to saving building materials is measured in tons of carbon dioxide per ton (tCO2 / t).

7. The method for calculating the carbon sequestration and emission reduction benefits of waste biomass low-carbon concrete according to claim 6, characterized in that: In step S3, the carbon fixation amount of the waste biomass pyrolysis charcoal is calculated according to the following formula: Where P b is the carbon fixation amount of waste biomass pyrolysis carbon, in tons of carbon dioxide (tCO2); α is the equivalent replacement percentage of waste biomass pyrolysis carbon in concrete; M con is the mass of low carbon concrete, in tons (t); W b It is the carbon content percentage of biomass pyrolysis char.

8. The method for calculating the carbon sequestration and emission reduction benefits of waste biomass low-carbon concrete according to claim 7, characterized in that: In step S4, the destructive effects of the waste biomass low-carbon concrete in the use environment include single or multiple coupling effects such as carbonization, freeze-thaw, weathering, alkali-aggregate reaction, and chloride ion erosion.

9. The method for calculating the carbon sequestration and emission reduction benefits of waste biomass low-carbon concrete according to claim 8, characterized in that: In step S4, the increase in the service life of the waste biomass low-carbon concrete is estimated from the time required from the start of destruction to the end of destruction. The indirect emission reduction amount of the increase in the service life of the concrete in step S4 is calculated according to the following formula: Where P l is the indirect emission reduction due to the increase in the service life of waste biomass low-carbon concrete, in tons of carbon dioxide (tCO2); Δt b It is the time required from the beginning to the end of the destruction of concrete without waste biomass under single or multi-coupled destruction. Δt c It is the time required for waste biomass low-carbon concrete from the beginning to the end of destruction in a single or multi-coupled destruction environment; M con is the mass of low carbon concrete, in tons (t); K con It is the carbon dioxide emission intensity corresponding to concrete of different strength grades, in tons of carbon dioxide per ton (tCO2 / t).

10. The method for calculating the carbon sequestration and emission reduction benefits of waste biomass low-carbon concrete according to claim 9, characterized in that: In step S5, the carbon sequestration and emission reduction benefits of waste biomass low-carbon concrete are calculated according to the following formula: P=P c +P b +P l -P r -E pt Where P is the carbon sequestration and emission reduction benefit of waste biomass low-carbon concrete, expressed in tons of carbon dioxide (tCO2); P c Carbon reduction of building materials saved for waste biomass low-carbon concrete; b is the carbon fixation amount of waste biomass pyrolysis char; P l The indirect emission reduction due to the increase in the service life of waste biomass low-carbon concrete; r is the carbon emission during pyrolysis; E pt Carbon emissions from key energy-consuming processes in waste biomass pyrolysis charcoal pretreatment.

Images