A carbon emission accounting method and system for ex situ remediation technology of contaminated soil

Abstract

The present invention provides a carbon emission accounting method and system for an ex situ remediation technology for contaminated soil, including determining a variety of activity elements in the carbon emission of the ex situ remediation technology for contaminated soil and the carbon emission factors corresponding to each activity element, determining the occurrence amount and carbon emission factors of the various activity elements, calculating the carbon emissions of a variety of links, and calculating the carbon emission level per unit of contaminated soil volume; the carbon emission accounting method of the present invention adopts an applicable carbon emission factor acquisition approach through boundary demarcation and inventory analysis, unifies the carbon emission accounting process of a variety of ex situ remediation technologies, can accurately evaluate the carbon emissions of the soil ex situ remediation process, is helpful to carry out carbon emission accounting for a variety of contaminated soil types and remediation projects in multiple regions, has good application potential, and at the same time, through the setting of the carbon emission accounting system, makes the collection and accounting process more scientific and convenient.

Description

Technical Field

[0001] This patent relates to the field of carbon emission accounting for contaminated soil remediation technology, specifically a carbon emission accounting method and system for ex situ remediation technology for contaminated soil. Background Art

[0002] With the rapid development of industry and agriculture in my country, a large amount of industrial and agricultural land has been polluted by various toxic and hazardous chemicals, bringing serious risks to the ecological environment and human health. Therefore, from the objective demand of environmental pollution control, the control and restoration of soil in my country, especially the soil in contaminated sites, is imperative.

[0003] There are various types of pollutants in the soil of contaminated sites, most of which are heavy metal and organic compound pollution, and have the characteristics of long pollution history, complex pollutant composition and high pollution level. At present, in the research projects on soil remediation of contaminated sites at home and abroad, more attention is paid to the operability, pollutant removal capacity and economy of its remediation technology, while less research is conducted on carbon emissions in remediation projects; in the environmental impact assessment related to project engineering practice, the carbon emission estimation and evaluation content in the design, construction operation and subsequent management of the remediation project is ignored. A study by the Canadian Department of Environment and Climate Change (ECCC) pointed out that in 2015, the operation of solid waste treatment and pollution remediation equipment in Canada contributed at least 3% of domestic greenhouse gas emissions. The review by Amponsah et al. also pointed out that activities in various links such as equipment operation, electricity consumption, material production and transportation in soil remediation projects will lead to greenhouse gas emissions. Under the increasingly prominent problem of global warming and the urgent need for my country to achieve the goal of "carbon neutrality" by 2060, all walks of life are actively carrying out industry carbon emission surveys and analysis and emission reduction strategy research. As a field of contaminated soil remediation and management that is closely related to the quality of the human living environment and agricultural production safety, we also need to take timely action to analyze and account for the current status of carbon emissions from contaminated sites in my country, to help achieve my country's "carbon neutrality" goal and efficiently utilize soil resources.

[0004] The implementation of contaminated soil remediation projects mainly includes the polluted land survey stage, the comparison and determination of treatment and remediation technical solutions, the construction and operation stage of the remediation project, the treatment and remediation effect evaluation stage, and the long-term supervision and system control stage after remediation. At present, the research on carbon emissions in contaminated soil remediation projects mainly focuses on the carbon emissions during the construction and operation stages of the project, and analyzes the total carbon emissions of the remediation project from the perspective of the life cycle evaluation (LCA) of various remediation solutions, which also provides a reference for the screening and effect evaluation of remediation solutions.

[0005] At present, there are various technologies for soil remediation of contaminated sites. Excavation, transportation, stacking, purification and reuse of contaminated soil is a commonly used off-site remediation method, which mainly includes soil leaching, thermal desorption (or thermal analysis), solidification stabilization, chemical oxidation / reduction, etc. In the selection stage of remediation schemes, we pay more attention to the removal ability of candidate remediation technologies for target pollutants, economic applicability and maturity of methods, while ignoring a series of new environmental problems they bring, such as secondary pollution of remediation agents, water pollution, and greenhouse gas emissions caused by electricity demand. Xue Chengjie et al. calculated the carbon emissions of various remediation technologies or disposal methods such as thermal desorption, chemical leaching, and biological remediation, and the results are about -10 to 500 kg CO 2 / t of contaminated soil, there are large differences between various remediation technologies. At present, the carbon emission estimates of some construction projects or other industries are mainly quantified through "carbon footprint", mainly using a "bottom-up" model based on process analysis method (PA-LCA) or a "top-down" model based on input-output analysis (EIO-LCA). There are not many studies and applications on carbon emission accounting methods in the ex situ remediation of soil with remediation technology. There is an urgent need to carry out research and establish relevant methods and systems. There is also a lack of sufficient and accurate assessment of the carbon emissions of various remediation technologies, so as to better evaluate the carbon emissions in the field of soil remediation and explore emission reduction paths, and thus serve the realization of my country's carbon neutrality goals in the future. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a carbon emission accounting method and system for ex situ remediation technology of contaminated soil.

[0007] The technical solution of the present invention is:

[0008] A method for calculating carbon emissions from ex situ remediation technology for contaminated soil, comprising the following steps:

[0009] S1: According to the ex situ remediation technology for contaminated soil, determine the three links of the ex situ remediation process for contaminated soil, namely, the pre-construction preparation stage a, the construction process operation stage b, and the post-construction exit stage c, as well as the various activity elements involved and the carbon emission factors corresponding to each activity element; the carbon emission factor is the greenhouse gas emission coefficient corresponding to the activity element and used to characterize the unit production or consumption activity, including the carbon content per unit calorific value or elemental carbon content, and the oxidation rate;

[0010] S2: Based on the carbon emission factor corresponding to each activity element, the carbon emission C of each activity element is calculated using the following formula I, using either the activity element occurrence amount or intensity data collected. i ;

[0011] C i =Q i ×EFi I

[0012] Among them, C i is the carbon emissions of various activity factors, kg; Q i One of the data of the amount or intensity of various activity elements, kg, L, kwh or m 3 EF i is the carbon emission factor, kg / kg, kg / L, kg / kwh or kg / m 3 ;

[0013] S3: Using the carbon emissions of various activity elements calculated in step S2, the carbon emissions corresponding to each link in the soil ex situ remediation process are calculated according to formula II;

[0014] C=∑ i＝1 C i II

[0015] Where C is the carbon emission in each link of soil ex situ remediation process, kg; C i is the carbon emissions of various activity factors, kg;

[0016] S4: According to the carbon emissions of each link calculated in step S3, the total carbon emissions of the soil ex situ remediation process are calculated using the following formula III;

[0017] C 总 =C a +C b +C c III

[0018] Among them, C 总 is the total carbon emissions of each stage of the three links a, b and c involved in the soil ex situ remediation process, kg; C a is the carbon emission in the pre-construction preparation stage, kg; C b is the carbon emission during the operation phase of the construction process, kg; C c is the carbon emission in the late construction exit stage, kg;

[0019] S5: Based on the total carbon emissions calculated in step S4, combined with the contaminated soil volume data processed during the soil ex situ remediation process, the carbon emissions per unit of contaminated soil volume of the soil ex situ remediation are calculated using the following formula IV;

[0020]

[0021] Among them, C 单 Carbon emissions per unit of polluted earth, kg / m 3 ; C 总 is the total carbon emission involved in the soil ex situ remediation process, kg; Q土 is the volume of contaminated earth during the ex situ soil remediation process, m 3 ;

[0022] Note: Through the establishment of the above algorithm, the carbon emissions of various types of contaminated soils and restoration projects in multiple regions can be summarized and accounted for, and the carbon emissions of the ex situ restoration process of various contaminated soils can be evaluated more accurately.

[0023] Further, step S1 includes:

[0024] S1-1, determine the carbon emission accounting boundaries corresponding to the three stages of pre-construction preparation stage a, construction process operation stage b, and post-construction exit stage c; the carbon emission accounting boundary is the set engineering scope of each stage in the ex situ remediation of contaminated soil combined with the evaluation requirements corresponding to the carbon emission accounting to generate the corresponding boundary;

[0025] S1-2, based on the carbon emission accounting boundary, conduct an inventory analysis of the activity elements involved in each link, list the types and occurrence amounts of each activity element, and determine the activity element type;

[0026] S1-3, according to the activity element type, determine the carbon emission factor corresponding to the activity element by querying the carbon emission factor database;

[0027] Note: Through the above method of boundary demarcation and inventory analysis, the carbon emission accounting standards of various ex situ remediation technologies of contaminated soil can be calculated and divided relatively uniformly, making the next step of data collection and accounting more reasonable and comprehensive.

[0028] Furthermore, the contaminated soil in step S1 includes heavy metal contaminated soil, organic contaminated soil and inorganic contaminated soil;

[0029] Note: Soil classification can facilitate analysis and selection of appropriate treatment methods.

[0030] Furthermore, the ex situ remediation technology for contaminated soil described in step S1 includes chemical leaching, chemical oxidation, chemical reduction, solidification / stabilization and ex situ thermal desorption;

[0031] Note: The classification of ex situ remediation technologies for contaminated soils can facilitate the analysis of activity elements.

[0032] Furthermore, the various activity elements described in step S1 include environmental carbon emissions and energy carbon emissions involved in the soil ex situ remediation process; the energy carbon emissions include carbon emissions generated by electricity, gasoline, and water used in the soil ex situ remediation equipment; the soil ex situ remediation equipment includes excavators, transport vehicles, screening crushers, mixers, dosing systems, or thermal desorption systems; the environmental carbon emissions include carbon emissions from sewage and waste gas into the environment;

[0033] Note: It is convenient to comprehensively determine the carbon emission related factors, and then determine and obtain the occurrence or intensity data of the activity elements.

[0034] Furthermore, the activity factor occurrence quantity or intensity data in step S2 is obtained through a greenhouse gas detector and an electric energy meter, a water energy meter and a fuel consumption meter respectively.

[0035] A system for carbon emission accounting method based on ex situ remediation technology for contaminated soil, comprising multiple groups of information collection modules arranged at carbon emission points, processing modules arranged at service control terminals, and control modules arranged at service control terminals and used to control the processing modules, wherein each group of information collection modules, processing modules, and control modules are equipped with a communication unit for remote communication with a host computer;

[0036] The information collection module includes a carbon emission collection unit for collecting environmental carbon emissions and an energy consumption collection unit for collecting energy consumption carbon emissions. The carbon emission collection unit includes a gas collection device and a wastewater detector. The energy consumption collection unit includes an electric energy meter, a water energy meter and a fuel consumption meter.

[0037] The processing module is internally installed with calculation software, which is equipped with a carbon emission factor database; the calculation software is internally provided with a data processing unit for searching for the corresponding unit carbon emission factor value and calculating the carbon emission of polluted earthwork;

[0038] Note: By establishing the above system, the process of manual detection, collection and calculation of data can be reduced, making calculations more scientific and convenient, and at the same time improving the accuracy of accounting.

[0039] Furthermore, a greenhouse gas detector is provided in the gas collection device, and the gas collection device comprises a collection pipe arranged vertically to the ground and a plurality of air inlet pipes arranged on the collection pipe, the air inlet pipe is provided with a plurality of one-way valves for introducing air into the collection pipe, and a ratchet ring is provided in the collection pipe at the horizontal position of each air inlet pipe, the ratchet ring is rotatably connected to the wall of the collection pipe through a connecting rod, the inner ring of the ratchet ring is provided with ratchet teeth, and the connecting rod is provided with a brush for cleaning the inner wall of the collection pipe;

[0040] A rotating shaft passing through a plurality of ratchet rings is provided in the collection tube, the upper end of the rotating shaft is rotatably connected to the top surface of the collection tube, and a clamping block for clamping with the ratchet teeth when rotating in the opposite direction is provided on the rotating shaft, the clamping block is rotationally limitedly connected to the rotating shaft through a torsion spring, a stirring blade is provided on the rotating shaft located between the plurality of ratchet rings, a baffle is provided in the collection tube, the baffle is located below the air inlet pipe, a first spring is provided below the baffle, the upper end of the first spring is connected to the baffle, and the lower end of the first spring is connected to the inner wall of the collection tube,

[0041] The lower end of the rotating shaft passes through the baffle and is fixedly connected to a first bevel gear arranged in the horizontal direction. The first bevel gear is connected to the output shaft of the motor arranged outside the collection tube. The baffle is slidably and sealedly connected to the inner wall of the collection tube. The baffle is rotationally and sealedly connected to the rotating shaft. The inner wall of the collection tube is provided with a second bevel gear meshing with the first bevel gear for transmission. The second bevel gear is rotationally connected to the inner wall of the collection tube through a connecting platform. The connecting platform is provided with a first connecting line for pulling the baffle downward, and the first connecting line is connected to the lower bottom surface of the baffle.

[0042] The interior of the rotating shaft is hollow and is provided with a push rod, the lower end of the push rod is located inside the rotating shaft between the baffle and the horizontal position of the first spring; and the lower end of the push rod is provided with a push block perpendicular to the push rod, the rotating shaft is provided with a through hole for the push block to pass through, the lower bottom surface of the push block is rotatably connected to the through hole, the push block is provided with a lever for causing the push rod to move upward when the baffle is pushed, and the top surface of the collection tube is provided with a valve for being pushed and opened by the push rod;

[0043] Description: Through the setting of the above-mentioned gas collection device, the carbon emissions in the environment can be collected and detected in real time during the soil ex situ remediation process, making the accounting more accurate and reasonable; through the setting of the air inlet pipe, the collection range of gas samples in the environment is increased, which can reduce the number of greenhouse gas detectors installed and used. Through the setting of the collection tube, the first connecting line, and the first bevel gear and the second bevel gear, when the rotating shaft rotates, the baffle moves downward to collect gas. Through the setting of the push rod and the lever, when the baffle moves downward to press the lever, the push block pushes the push rod upward to automatically open the valve; through the setting of the first spring, the baffle is automatically reset and drives the rotating shaft to rotate in the opposite direction.

[0044] Further, the outer ring of the ratchet ring is provided with a second connecting line, a moving rod parallel to the intake pipe is provided in the intake pipe, one end of the moving rod is connected to the inner wall of the intake pipe through a second spring, and the other end of the moving rod is connected to the second connecting line, and a plurality of cleaning brushes for cleaning the one-way valve are provided on the moving rod;

[0045] Note: Through the above arrangement, when the rotating shaft rotates in the opposite direction, the first connecting line pulls the moving rod, so that the cleaning brush cleans the position of the one-way valve.

[0046] The beneficial effects of the present invention are:

[0047] (1) The carbon emission accounting method proposed in the present invention can unify the carbon emission accounting process of various ex situ remediation technologies for contaminated soils by demarcating boundaries and performing inventory analysis, and adopts a more applicable way to obtain carbon emission factors. It can also accurately evaluate and compare the differences in carbon emissions during the ex situ remediation of various contaminated soils, and is helpful for carrying out carbon emission accounting for remediation projects of various contaminated soil types and in multiple regions, and has good application potential.

[0048] (2) The present invention establishes a carbon emission accounting system for the ex situ remediation technology of contaminated soil, which makes it easier to find carbon emission factors and calculate the emission process, reduces the process of manual detection, collection and calculation of data, makes the calculation more scientific and efficient, and improves the accuracy of the calculation.

[0049] (3) The present invention can collect and detect carbon emissions in the environment in real time during the ex situ soil remediation process by setting a gas collection device, further increasing the collection range of gas samples in the environment, thereby reducing the number of greenhouse gas detectors installed and used; at the same time, the gas sample can be stirred by setting a stirring blade, and when the baffle moves down and presses the lever, the push block pushes the push rod upward to automatically open the valve; the baffle is automatically reset by setting a first spring and drives the rotating shaft to rotate in the opposite direction, so that the cleaning brush cleans the position of the one-way valve; thereby, the greenhouse gas detector has a wide detection range, thereby reducing the number of greenhouse gas detectors installed and the amount of human operation, and making the sample collection more accurate and scientific. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 This is a flow chart of carbon emission accounting for the ex situ remediation technology of the present invention;

[0051] Figure 2 is a flow chart for determining carbon emission factors in the present invention;

[0052] Figure 3 is a flow chart of the carbon emission system of the ex situ remediation technology of the present invention;

[0053] Figure 4 It is a schematic diagram of the appearance of the gas collection device of the present invention;

[0054] Figure 5 It is a schematic diagram of the structure of the gas collection device of the present invention;

[0055] Figure 6 is a schematic diagram of the appearance of the rotating shaft of the present invention;

[0056] Figure 7 is a schematic diagram of the appearance of the ratchet ring of the present invention;

[0057] Figure 8It is a schematic diagram of the assembly of the moving rod and the air intake pipe of the present invention;

[0058] Among them, 1-collection tube, 11-valve, 12-ratchet ring, 13-rotating shaft, 131-stirring blade, 132-push rod, 133-push block, 134-push rod, 135-block, 14-baffle, 15-first spring, 16-first bevel gear, 17-second bevel gear, 18-connecting platform, 19-first connecting line, 2-inlet pipe, 21-check valve, 22-moving rod, 221-cleaning brush, 23-second connecting line, 24-second spring. DETAILED DESCRIPTION

[0059] The present invention is further described in detail below in conjunction with specific implementation methods to better reflect the advantages of the present invention.

[0060] Example 1

[0061] A method for calculating carbon emissions from ex situ remediation technology for contaminated soil, comprising the following steps:

[0062] S1: According to the ex situ remediation technology for contaminated soil, the three links of the ex situ remediation process for contaminated soil are determined, namely, the pre-construction preparation stage a, the operation stage b during the construction process, and the exit stage c after the construction. According to each link, the various activity elements in the carbon emission of the ex situ remediation technology for contaminated soil and the carbon emission factors corresponding to each activity element are determined; the carbon emission factor is a coefficient corresponding to the activity element, including the carbon content per unit calorific value or the elemental carbon content, the oxidation rate, etc., which characterizes the greenhouse gas emission coefficient per unit production or consumption activity;

[0063] S1-1, determine the carbon emission accounting boundaries corresponding to the three stages of pre-construction preparation stage a, construction process operation stage b, and post-construction exit stage c; the carbon emission accounting boundary is the set engineering scope of each stage in the ex situ remediation of contaminated soil combined with the evaluation requirements corresponding to the carbon emission accounting to generate the corresponding boundary;

[0064] S1-2, based on the carbon emission accounting boundary, conduct an inventory analysis of the activity elements involved in each link, list the types and occurrence amounts of each activity element, and determine the activity element type;

[0065] S1-3, according to the activity element type, determine the carbon emission factor corresponding to the activity element by querying the carbon emission factor database;

[0066] The contaminated soil includes heavy metal contaminated soil, organic contaminated soil and inorganic contaminated soil; the ex situ remediation technology of contaminated soil includes chemical leaching, chemical oxidation, chemical reduction, solidification / stabilization and ex situ thermal desorption;

[0067] S2: Based on the carbon emission factor of each activity element, use the following formula I, using either the activity element occurrence amount or intensity data obtained, to calculate the carbon emission C of each activity element i ;

[0068] C i =Q i ×EF i I

[0069] Among them, C i is the carbon emissions of various activity factors, kg; Q i One of the data of the amount or intensity of various activity elements, kg, L, kwh or m 3 EF i is the carbon emission factor, kg / kg, kg / L, kg / kwh or kg / m 3 ; The activity factor occurrence amount or intensity data are obtained through greenhouse gas detectors and electric energy meters, water energy meters and fuel consumption meters respectively; greenhouse gas detectors are commercially available;

[0070] S3: Using the carbon emissions of various activity elements calculated in step S2, the carbon emissions corresponding to each link in the soil ex situ remediation process are calculated according to formula II;

[0071] C=∑ i＝1 C i II

[0072] Where C is the carbon emission in each link of soil ex situ remediation process, kg; C i is the carbon emissions of various activity factors, kg;

[0073] S4: According to the carbon emissions of each link in step S3, the total carbon emissions of the soil ex situ remediation process are calculated using the following formula III;

[0074] C 总 =C a +C b +C c III

[0075] Among them, C 总 is the total carbon emissions of each stage of the three links a, b and c involved in the soil ex situ remediation process, kg; C a is the carbon emission in the pre-construction preparation stage, kg; C b is the carbon emission during the operation phase of the construction process, kg; C c is the carbon emission in the late construction exit stage, kg;

[0076] S5: Based on the total carbon emissions in step S4 and the contaminated soil volume data processed during the soil ex situ remediation process, the carbon emissions per unit of contaminated soil volume during the soil ex situ remediation process are calculated using the following formula IV;

[0077]

[0078] Among them, C 单 Carbon emissions per unit of polluted earthwork, kg / m 3 ; C 总 is the total carbon emission involved in the soil ex situ remediation process, kg; Q 土 is the volume of contaminated earth during the ex situ soil remediation process, m 3 ;

[0079] The earthwork volume is specifically the sum of the filling and excavation volumes. The earthwork volume is calculated by taking the distance between two adjacent cross sections as the calculation unit, that is, respectively calculating the area of ​​the roadbed on the two adjacent cross sections and the distance between the two cross sections.

[0080] The various activity elements include environmental carbon emissions and energy carbon emissions involved in the soil ex situ remediation process; the energy carbon emissions include carbon emissions generated by electricity, gasoline, and water used in the soil ex situ remediation equipment; the soil ex situ remediation equipment includes excavators, transport vehicles, screening crushers, mixers, dosing systems or thermal desorption systems; the environmental carbon emissions include the carbon emissions of sewage and waste gas into the environment;

[0081] A system for carbon emission accounting method based on ex situ remediation technology for contaminated soil, comprising multiple groups of information collection modules arranged at carbon emission points, processing modules arranged at service control terminals, and control modules arranged at service control terminals and used to control the processing modules, wherein each group of information collection modules, processing modules, and control modules are equipped with a communication unit for remote communication with a host computer;

[0082] The information collection module includes a carbon emission collection unit for collecting environmental carbon emissions and an energy consumption collection unit for collecting energy consumption carbon emissions. The carbon emission collection unit includes a gas collection device and a wastewater detector. The energy consumption collection unit includes an electric energy meter, a water energy meter and a fuel consumption meter.

[0083] The processing module is internally installed with calculation software, which is equipped with a carbon emission factor database; the calculation software is internally provided with a data processing unit for searching for the corresponding unit carbon emission factor value and calculating the carbon emission of polluted earthwork;

[0084] The carbon emission factor database is a database formed by screening and using existing database software or one or more methods that include the IPCC National Greenhouse Gas Emission Inventory Guidelines, the Provincial Greenhouse Gas Inventory Compilation Guidelines, the China Life Cycle Database (CLCD), the China Product Greenhouse Gas Emissions Dataset, relevant national calculation standards or publicly published literature;

[0085] The data processing unit inputs the data collected by the carbon emission collection unit and the energy consumption collection unit within a unit time into the calculation software in the processing module, and searches the carbon emission factor database for the corresponding unit carbon emission factor value according to the data of various activity elements collected by the carbon emission collection unit and the energy consumption collection unit;

[0086] Then, the carbon emissions of each carbon emission source are obtained according to accounting formula I; the carbon emissions of various links are obtained according to accounting formula II, the carbon emissions of the entire soil ex situ remediation process are determined as total carbon emissions according to accounting formula III, and the carbon emissions per unit of contaminated earthwork are obtained according to accounting formula IV; finally, the carbon emissions per unit of contaminated earthwork are output to the control module and the host computer.

[0087] Example 2

[0088] This embodiment is further configured on the basis of the embodiment 1, specifically, the gas collection device is provided with a greenhouse gas detector, such as Figure 2 , 3 As shown, the gas collection device comprises a collection pipe 1 arranged vertically to the ground and two air inlet pipes 2 arranged on the collection pipe 1. The air inlet pipes 2 are provided with a plurality of one-way valves 21 for introducing air into the collection pipe 1.

[0089] like Figure 4 , 5 As shown in FIG. 7 , a ratchet ring 12 is provided in the collection tube 1 at the horizontal position of each air inlet pipe 2. The ratchet ring 12 is rotatably connected to the wall of the collection tube 1 through a connecting rod. The inner ring of the ratchet ring 12 is provided with ratchet teeth. The connecting rod is provided with a brush for cleaning the inner wall of the collection tube 1.

[0090] The collection tube 1 is provided with a rotating shaft 13 passing through two ratchet rings 12. The upper end of the rotating shaft 13 is rotatably connected to the top surface of the collection tube 1. The rotating shaft 13 is provided with a clamping block 135 for clamping with the ratchet teeth when rotating in the opposite direction. The clamping block 135 is connected to the rotating shaft 13 through a torsion spring. A stirring blade 131 is provided on the rotating shaft 13 between the two ratchet rings 12.

[0091] like Figure 5As shown, a baffle 14 is provided in the collection tube 1, and the baffle 14 is located below the air inlet pipe 2. A first spring 15 is provided below the baffle 14, and the upper end of the first spring 15 is connected to the baffle 14, and the lower end of the first spring 15 is connected to the inner wall of the collection tube 1.

[0092] The lower end of the rotating shaft 13 passes through the baffle 14 and is fixedly connected with a first bevel gear 16 arranged in the horizontal direction. The first bevel gear 16 is connected to the output shaft of the motor arranged outside the collection tube 1. The baffle 14 is slidably and sealedly connected to the inner wall of the collection tube 1. The baffle 14 is rotatably and sealedly connected to the rotating shaft 13. The inner wall of the collection tube 1 is provided with a second bevel gear 17 meshing with the first bevel gear 16 for transmission. The second bevel gear 17 is rotatably connected to the inner wall of the collection tube 1 through a connecting platform 18. The connecting platform 18 is provided with a first connecting line 19 for pulling the baffle 14 downward. The first connecting line 19 is connected to the bottom surface of the baffle 14.

[0093] like Figure 5 , 6 As shown, the interior of the rotating shaft 13 is hollow and provided with a push rod 132, the lower end of the push rod 132 is located inside the rotating shaft 13 between the baffle 14 and the horizontal position of the first spring 15; and the lower end of the push rod 132 is provided with a push block 133 perpendicular to the push rod 132, the rotating shaft 13 is provided with a through hole for the push block 133 to pass through, the lower bottom surface of the push block 133 is rotatably connected to the through hole, the push block 133 is provided with a lever 134 for causing the push rod 132 to move upward when the baffle 14 pushes, and the top surface of the collection tube 1 is provided with a valve 11 for being pushed and opened by the push rod 132;

[0094] like Figure 8 As shown, the outer ring of the ratchet ring 12 is provided with a second connecting line 23, and a moving rod 22 parallel to the intake pipe 2 is provided in the intake pipe 2, one end of the moving rod 22 is connected to the inner wall of the intake pipe 2 through a second spring 24, and the other end of the moving rod 22 is connected to the second connecting line 23, and two cleaning brushes 221 for cleaning the one-way valve 21 are provided on the moving rod 22;

[0095] The working method used by the carbon emission accounting system of the above-mentioned contaminated soil ex situ remediation technology is:

[0096] First, ensure that the first spring 15 is in a normal uncompressed state. At this time, turn on the motor to rotate the first bevel gear 16, which drives the second bevel gear 17 and the connecting platform 18 to rotate. The first connecting line 19 on the connecting platform 18 is wound around the connecting platform 18. The first connecting line 19 pulls the baffle 14 to move downward, so that the pressure in the collection pipe 1 above the baffle 14 and the intake pipe 2 is reduced, and the one-way valve 21 opens and sucks air into the collection pipe 1 to achieve collection. Within a unit time, the baffle 14 moves down to the position close to the lever 13. 4, the greenhouse gas detector is turned on to detect the carbon content in the collection tube 1; at the same time, the first bevel gear 16 drives the rotating rod 13 to rotate, so that the stirring blade 131 stirs the collected gas evenly to improve the detection effect; when the baffle 14 moves to the lever 134 and presses the lever 134 downward, the lever 134 presses down one end of the push block 133, and the push block 133, under the action of the lever force of the connection point with the through hole as the support point, makes the other end of the push block 133 push the push rod 132 to move upward, and the push rod 132 pushes the valve 11 to open;

[0097] At this time, the connection between the motor and the first bevel gear 16 is disconnected, the collection tube 1 no longer takes in air and is connected to the outside through the valve 11, and the block 14 moves upward under the action of the first spring 15 to reset. During the upward process of the first baffle 14, the connecting platform 18 and the second bevel gear 17 are pulled by the first connecting line 19 to rotate, and the second bevel gear 17 drives the first bevel gear 16 to rotate in the opposite direction, and the first bevel gear 16 drives the rotating shaft 13 to rotate in the opposite direction, and the block 135 is engaged with the ratchet teeth, and the rotating shaft 13 drives the ratchet ring 12 rotates, the ratchet ring 12 winds and tightens the second connecting line 23 and pulls the moving rod 22 to move through the second connecting line 23, so that the cleaning brush 221 cleans the position of the one-way valve 21, and when the baffle 14 stops moving, the rotating shaft 13 also stops rotating. Under the pulling force of the second spring 24, the moving rod 22 pulls the ratchet ring 12 through the second connecting line 23 to rotate forward. Due to the forward rotation of the ratchet ring 12 and the action of the torsion spring, the blocking block 135 is no longer engaged with the ratchet ring 12, so that the moving rod 22 is reset.

Claims

1. A method for calculating carbon emissions from ex situ remediation of contaminated soils. It is characterized in that The following steps are involved: S1: According to the ex situ remediation technology for contaminated soil, determine the three links of the ex situ remediation process for contaminated soil, namely, the pre-construction preparation stage a, the construction process operation stage b, and the post-construction exit stage c, as well as the various activity elements involved and the carbon emission factors corresponding to each activity element; the carbon emission factor is the greenhouse gas emission coefficient corresponding to the activity element and used to characterize the unit production or consumption activity, including the carbon content per unit calorific value or elemental carbon content, and the oxidation rate; S2: Based on the carbon emission factor corresponding to each activity element, the carbon emission C of each activity element is calculated using the following formula I, using either the activity element occurrence amount or intensity data collected. i ; C i =Q i ×EF i I Among them, C i is the carbon emissions of various activity factors, kg; Q i One of the data of the amount or intensity of various activity elements, kg, L, kwh or m 3 EF i is the carbon emission factor, kg / kg, kg / L, kg / kwh or kg / m 3 ; S3: Using the carbon emissions of various activity elements calculated in step S2, the carbon emissions corresponding to each link in the soil ex situ remediation process are calculated according to formula II; C=∑ i＝1 C i II Where C is the carbon emission in each link of soil ex situ remediation process, kg; C i is the carbon emissions of various activity factors, kg; S4: According to the carbon emissions of each link calculated in step S3, the total carbon emissions of the soil ex situ remediation process are calculated using the following formula III; C 总 =C a +C b +C c III Among them, C 总 is the total carbon emissions of each stage of the three links a, b and c involved in the soil ex situ remediation process, kg; C a is the carbon emission in the pre-construction preparation stage, kg; C b is the carbon emission during the operation phase of the construction process, kg; C c is the carbon emission in the late construction exit stage, kg; S5: Based on the total carbon emissions calculated in step S4, combined with the contaminated soil volume data processed during the soil ex situ remediation process, the carbon emissions per unit of contaminated soil volume of the soil ex situ remediation are calculated using the following formula IV; Among them, C 单 Carbon emissions per unit of polluted earth, kg / m 3 ; C 总 is the total carbon emission involved in the soil ex situ remediation process, kg; Q 土 is the volume of contaminated earth during the ex situ soil remediation process, m 3 ; The system used in the accounting method includes multiple groups of information collection modules arranged at the carbon emission point, a processing module arranged at the service control terminal, and a control module arranged at the service control terminal and used to control the processing module, wherein each group of information collection modules, processing modules and control modules are equipped with a communication unit for remote communication with a host computer; The information collection module includes a carbon emission collection unit for collecting environmental carbon emissions and an energy consumption collection unit for collecting energy consumption carbon emissions. The carbon emission collection unit includes a gas collection device and a wastewater detector. The energy consumption collection unit includes an electric energy meter, a water energy meter and a fuel consumption meter. The processing module is internally installed with calculation software, which is equipped with a carbon emission factor database; the calculation software is internally provided with a data processing unit for searching for the corresponding unit carbon emission factor value and calculating the carbon emission of polluted earthwork; The gas collection device is provided with a greenhouse gas detector, and comprises a collection pipe (1) arranged perpendicular to the ground and a plurality of air intake pipes (2) arranged on the collection pipe (1), wherein the air intake pipes (2) are provided with a plurality of one-way valves (21) for intake of air into the collection pipe (1). A ratchet ring (12) is provided in the collection tube (1) at the horizontal position of each air inlet pipe (2), and the ratchet ring (12) is rotatably connected to the tube wall of the collection tube (1) through a connecting rod. The inner ring of the ratchet ring (12) is provided with ratchet teeth, and the connecting rod is provided with a brush for cleaning the inner wall of the collection tube (1). A rotating shaft (13) passing through a plurality of ratchet rings (12) is provided in the collection tube (1); the upper end of the rotating shaft (13) is rotatably connected to the top surface of the collection tube (1); a clamping block (135) is provided on the rotating shaft (13) for clamping with the ratchet teeth when rotating in the opposite direction; the clamping block (135) is rotatably limitedly connected to the rotating shaft (13) via a torsion spring; a stirring blade (131) is provided on the rotating shaft (13) located between the plurality of ratchet rings (12); A baffle (14) is provided in the collection pipe (1), and the baffle (14) is located below the air inlet pipe (2). A first spring (15) is provided below the baffle (14), and the upper end of the first spring (15) is connected to the baffle (14), and the lower end of the first spring (15) is connected to the inner wall of the collection pipe (1). The lower end of the rotating shaft (13) passes through the baffle (14) and is fixedly connected to a first bevel gear (16) arranged in the horizontal direction. The first bevel gear (16) is connected to the output shaft of a motor arranged outside the collection tube (1). The baffle (14) is slidably and sealedly connected to the inner wall of the collection tube (1). The baffle (14) is rotatably and sealedly connected to the rotating shaft (13). The inner wall of the collection tube (1) is provided with a second bevel gear (17) meshing with the first bevel gear (16). The second bevel gear (17) is rotatably connected to the inner wall of the collection tube (1) through a connecting platform (18). The connecting platform (18) is provided with a first connecting line (19) for pulling the baffle (14) downward. The first connecting line (19) is connected to the bottom surface of the baffle (14). The interior of the rotating shaft (13) is hollow and is provided with a push rod (132); the lower end of the push rod (132) is located inside the rotating shaft (13) between the baffle plate (14) and the horizontal position of the first spring (15); and a push block (133) perpendicular to the push rod (132) is provided at the lower end of the push rod (132); a through hole for the push block (133) to pass through is provided on the rotating shaft (13); the lower bottom surface of the push block (133) is rotatably connected to the through hole; and a dial is provided on the push block (133) for causing the push rod (132) to move upward when the baffle plate (14) pushes. A rod (134) is provided on the top surface of the collection tube (1) for pushing and opening a valve (11) by means of a push rod (132); a second connecting line (23) is provided on the outer ring of the ratchet ring (12); a moving rod (22) parallel to the air intake pipe (2) is provided inside the air intake pipe (2); one end of the moving rod (22) is connected to the inner wall of the air intake pipe (2) via a second spring (24); the other end of the moving rod (22) is connected to the second connecting line (23); a plurality of cleaning brushes (221) for cleaning the one-way valve (21) are provided on the moving rod (22).

2. According to the carbon emission accounting method of the ex situ remediation technology of contaminated soil in claim 1, It is characterized in that Step S1 includes: S1-1, determine the carbon emission accounting boundaries corresponding to the three stages of pre-construction preparation stage a, construction process operation stage b, and post-construction exit stage c; the carbon emission accounting boundary is the set engineering scope of each stage in the process of ex situ remediation of contaminated soil combined with the evaluation requirements corresponding to carbon emission accounting to generate the corresponding boundary; S1-2, based on the carbon emission accounting boundary, conduct an inventory analysis of the activity elements involved in each link, list the types and occurrence amounts of each activity element, and determine the activity element type; S1-3, according to the activity element type, determine the carbon emission factor corresponding to the activity element by querying the carbon emission factor database.

3. According to the carbon emission accounting method of the ex situ remediation technology of contaminated soil in claim 1, It is characterized in that The contaminated soil in step S1 includes organic contaminated soil and inorganic contaminated soil.

4. According to the carbon emission accounting method of the ex situ remediation technology of contaminated soil in claim 1, It is characterized in that The ex situ remediation technologies for contaminated soil described in step S1 are: chemical leaching, chemical oxidation, chemical reduction, solidification / stabilization and ex situ thermal desorption.

5. According to the carbon emission accounting method of the ex situ remediation technology of contaminated soil in claim 1, It is characterized in that The various activity elements described in step S1 include environmental carbon emissions and energy consumption carbon emissions involved in the soil ex situ remediation process; the energy consumption carbon emissions include carbon emissions generated by electricity, gasoline, and water used in the soil ex situ remediation equipment; the soil ex situ remediation equipment includes excavators, transport vehicles, screening crushers, mixers, dosing systems or thermal desorption systems; the environmental carbon emissions include carbon emissions from sewage and exhaust gas into the environment.

6. According to claim 1, a method for calculating carbon emissions from ex situ remediation of contaminated soil. It is characterized in that The activity factor occurrence quantity or intensity data in step S2 is obtained through a greenhouse gas detector and an electric energy meter, a water energy meter, and a fuel consumption meter.

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