Device and method for measuring permeability of compost covering film in real time

Abstract

The invention relates to the technical field of film permeability testing equipment, and provides a device and method for real-time determination of permeability of a compost covering film.The device for real-time determination of permeability of the compost covering film.The device comprises a first detection box and a second detection box, the first detection box is provided with a first inner cavity and a first opening, and the second detection box is provided with a second inner cavity; the first detection box is provided with a first inner cavity and a second opening, a first sensor assembly is arranged in the first inner cavity, the first detection box is provided with an air inlet communicated with the first inner cavity, the second detection box is provided with a second inner cavity and a second opening, a second sensor assembly is arranged in the second inner cavity, and the second detection box is provided with an air outlet communicated with the second inner cavity. The first opening and the second opening are oppositely arranged, and the first detection box and the second detection box are arranged in a fitting manner, so that the to-be-detected film can be clamped between the first detection box and the second detection box. The device for measuring the permeability of the compost covering film in real time has the advantages of being convenient to carry and operate, intelligent in induction, high in use flexibility and the like.

Description

Technical Field

[0001] The invention relates to the technical field of membrane permeability testing equipment, and in particular to a device and method for real-time measurement of permeability of a compost covering membrane. Background Art

[0002] During the composting process, membrane coverage plays a vital role in increasing the nutrient content of fertilizers, improving composting efficiency and reducing environmental pollution. Gas permeability is an important performance to ensure the membrane's barrier efficiency for gases generated during the composting process, environmental pollution control and cavity pressure regulation. At present, the gas permeability performance test of the membrane is mainly based on the national standard GB / T40260-2021 "Test Method for Gas Permeability of Polymer Membrane Materials" or GB / T1038-2000 "Plastic Film and Thin Film Gas Permeability Test Method Pressure Difference Method" for offline testing, lacking real-time monitoring and evaluation capabilities. At the same time, the existing membrane layer permeability detection equipment has a complex structure, bulky size and heavy weight, which leads to poor portability and difficult operation, making it impossible for composting plant practitioners to evaluate the quality of the purchased membrane materials and monitor the performance of membrane composting, which is not conducive to the regulation of the composting process. Summary of the invention

[0003] The present invention provides a device for real-time measurement of compost covering membrane permeability, which is used to solve the problem of real-time monitoring and evaluation of membrane gas permeability during composting that has not been achieved in the prior art. At the same time, in view of the defect that the existing measurement device is poor in portability and is not conducive to on-site deployment, a highly portable and intelligent measurement device is provided to test the permeability of the membrane layer on-site.

[0004] The present invention provides a device for real-time measurement of the permeability of a compost covering film, comprising: A first detection box, wherein the first detection box has a first inner cavity and a first opening, a first sensor assembly is disposed in the first inner cavity, and an air inlet communicating with the first inner cavity is disposed on the first detection box; A second detection box, wherein the second detection box has a second inner cavity and a second opening, a second sensor assembly is disposed in the second inner cavity, and an air outlet communicated with the second inner cavity is disposed on the second detection box; The first opening and the second opening are arranged facing each other, and the first detection box and the second detection box are arranged in close contact with each other, so that the film to be tested can be sandwiched between the first detection box and the second detection box.

[0005] In some embodiments, a first air pump is disposed in the first inner cavity, and the first air pump is connected to the air inlet.

[0006] In some embodiments, the first detection box has a first end surface, the first opening is provided on the first end surface, and a first annular magnet is provided on the first end surface; The second detection box has a second end surface, the second opening is arranged on the second end surface, and a second annular magnet is arranged on the second end surface; The first magnet and the second magnet are capable of being attached to each other.

[0007] In some embodiments, a first sealing ring is provided on the first end surface, the first sealing ring is provided on the outer peripheral side of the first magnet, and the surface of the first sealing ring is flush with the surface of the first magnet; A second sealing ring is disposed on the second end surface. The second sealing ring is disposed on the outer peripheral side of the second magnet. The surface of the second sealing ring is flush with the surface of the second magnet.

[0008] In some embodiments, the first sensor assembly includes a first housing, a first concentration sensor, a first humidity sensor and a first pressure sensor are disposed in the first housing, and the first concentration sensor is multiple so as to test the concentration of multiple gases; The second sensor assembly includes a second shell, in which a second concentration sensor, a second humidity sensor and a second pressure sensor are arranged. There are multiple second concentration sensors so as to test the concentrations of multiple gases.

[0009] In some embodiments, the first detection box includes a first data acquisition module, and the first sensor assembly and the first air pump are both connected to the first data acquisition module; The second detection box includes a second data acquisition module, and the second sensor component is electrically connected to the second data acquisition module.

[0010] In some embodiments, the first data acquisition module includes a first display screen, and the first display screen is disposed on the outer surface of the first detection box; The second data acquisition module includes a second display screen, and the second display screen is arranged on the outer surface of the second detection box.

[0011] In some embodiments, the device for real-time measurement of compost covering film permeability includes a cloud processor, and the first data acquisition module and the second data acquisition module are both electrically connected to the cloud processor.

[0012] The present invention provides a method for real-time measurement of permeability of a compost covering film, comprising: Arrange the first opening of the first detection box and the second opening of the second detection box facing each other; The membrane to be tested is clamped between the first opening and the second opening; Fitting the first magnet to the second magnet; Starting the first air pump to fill the first inner cavity with working gas; Using the gas flow data Q recorded in the cloud when the first gas pump is running; Recording a difference ΔP between data collected by the first pressure sensor and the second pressure sensor; The cloud processor calculates the results based on the numerical values.

[0013] In some embodiments, the cloud processor includes, based on the numerical calculation result: The permeability of the membrane to be tested is calculated according to the formula Permeability = Q × L / (A × ΔP), where: Permeability is the average gas permeability, in or ; L represents the thickness of the film to be tested, in units of ; A represents the area of ​​the film to be tested, in units of ; Q, unit is or ; ΔP, in units of or .

[0014] The device for real-time determination of the permeability of the compost covering film of the embodiment of the present invention is convenient for detecting the performance of the film to be tested by setting a first detection box and a second detection box, and setting a first sensor assembly and a second sensor assembly in the box body. Moreover, the device for real-time determination of the permeability of the compost covering film is small in size, light in weight, and has real-time numerical sensing. Users can choose different materials for customization according to needs, and easily bring it to different test environments for real-time measurement. Moreover, when in use, it is only necessary to clamp the film to be tested between the first detection box and the second detection box. The operation is simple, easy to use, and highly flexible. In addition, by using the device for real-time determination of the permeability of the compost covering film provided by the embodiment of the present invention, the permeability performance and other key parameters of the film layer can be monitored in real time; it is convenient for rapid deployment on site, and can measure the performance of the film layer on the surface of the compost in real time; it enables the operator to adjust the ventilation conditions in time, optimize the composting process, thereby improving the uniformity and efficiency of the composting, and reducing energy consumption and costs.

[0015] The method for real-time determination of the permeability of a compost covering film according to the embodiment of the present invention has the advantages of convenient operation and high flexibility in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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.

[0017] Figure 1 The present invention is a schematic diagram of the working state of the device for real-time measurement of the permeability of compost covering film provided by the present invention.

[0018] Figure 2 It is a schematic diagram of the structure of a device for real-time measurement of the permeability of a compost covering film provided by the present invention.

[0019] Figure 3 It is a structural schematic diagram of a first detection box of the device for real-time measurement of permeability of compost covering film provided by the present invention.

[0020] Figure 4 It is a schematic structural diagram of a second detection box of the device for real-time determination of permeability of compost covering film provided by the present invention.

[0021] Reference numerals: 1. First detection box; 10. First inner cavity; 11. First opening; 12. First sensor assembly; 13. First air pump; 14. First end surface; 15. First magnet; 16. First sealing ring; 17. First shell; 18. First display screen; 19. Air inlet; 2. Second detection box; 20. Second inner cavity; 21. Second opening; 22. Second sensor assembly; 23. Second end surface; 24. Second magnet; 25. Second sealing ring; 26. Second shell; 27. Second display screen; 28. Air outlet; 3. Film to be tested. DETAILED DESCRIPTION

[0022] 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, not all of 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.

[0023] like Figures 1 to 4 As shown, an embodiment of the present invention discloses a device for real-time measurement of permeability of a compost covering film, comprising a first detection box 1 and a second detection box 2.

[0024] The first detection box 1 has a first inner cavity 10 and a first opening 11 . A first sensor assembly 12 is disposed in the first inner cavity 10 . An air inlet 19 communicating with the first inner cavity 10 is disposed on the first detection box 1 .

[0025] The second detection box 2 has a second inner cavity 20 and a second opening 21 . A second sensor assembly 22 is disposed in the second inner cavity 20 . An air outlet 28 communicating with the second inner cavity 20 is disposed on the second detection box 2 .

[0026] The first opening 11 and the second opening 21 are arranged facing each other, and the first detection box 1 and the second detection box 2 are arranged in close contact, so that the film to be tested 3 can be sandwiched between the first detection box 1 and the second detection box 2 .

[0027] For ease of description, the up and down directions are as follows Figure 1 shown.

[0028] The lower end of the first detection box 1 is sealed, and the upper end of the first detection box 1 is provided with a first opening 11, and the upper end of the second detection box 2 is sealed, and the lower end of the second detection box 2 is provided with a second opening 21. In other words, the structure and size of the box body of the first detection box 1 and the box body of the second detection box 2 are substantially the same, but the arrangement directions are opposite. For example, the first detection box 1 and the second detection box 2 are both in the shape of a cube, a cuboid or a cylinder.

[0029] The first sensor assembly 12 and the second sensor assembly 22 include various types of sensors to detect the concentration, pressure, humidity, etc. of the working gas.

[0030] When the device for real-time permeability measurement of compost covering film of the embodiment of the present invention is working, the first opening 11 of the first detection box 1 is facing upward, and then the film to be tested 3 is laid on the first detection box 1 to block the first opening 11, and then the second opening 21 of the second detection box 2 is facing downward and arranged face to face with the first opening 11, and then the first detection box 1 and the second detection box 2 are pressed tightly together to sandwich the film to be tested 3 in the middle. Finally, the working gas is introduced into the first detection box 1 through the air inlet 19, and a part of the working gas in the first inner cavity 10 can penetrate into the second inner cavity 20 through the film to be tested 3 layer, and then the gas flows out from the air outlet 28.

[0031] The first sensor assembly 12 is used to obtain data such as the concentration, pressure, and humidity of the working gas in the first inner cavity 10 in real time. The second sensor assembly 22 is used to obtain data such as the concentration, pressure, and humidity of the working gas that penetrates into the second inner cavity 20 in real time, so as to automatically calculate parameters such as the permeability or gas membrane retention rate of the membrane to be tested 3. The first sensor assembly 12 and the second sensor assembly 22 can be customized according to needs to test different working gases.

[0032] In the related art, membrane permeability testing equipment has a complex structure, large size and heavy weight, which results in poor portability and is not conducive to rapid deployment in different testing environments. Moreover, these devices usually require professional personnel to operate, which greatly limits their flexibility.

[0033] The device for real-time measurement of the permeability of compost covering film of the embodiment of the present invention is provided with a first detection box 1 and a second detection box 2, and a first sensor assembly 12 and a second sensor assembly 22 are provided in the box body, so as to facilitate the detection of the performance of the film 3 to be tested. Moreover, the device for real-time measurement of the permeability of compost covering film is small in size and light in weight. Users can choose different materials for customization according to needs, and easily bring it to different test environments for real-time measurement. Moreover, when in use, it is only necessary to clamp the film 3 to be tested between the first detection box 1 and the second detection box 2, which is simple to operate, easy to use, and highly flexible.

[0034] In addition, by using the device for real-time measurement of the permeability of the compost covering film provided by the embodiment of the present invention, the permeability performance and other key parameters of the membrane layer can be monitored in real time, which is convenient for rapid deployment on site and can instantly measure the performance of the membrane layer on the compost surface, so that the operator can adjust the ventilation conditions in time, optimize the composting process, and thereby improve the uniformity and efficiency of the composting and reduce energy consumption and costs.

[0035] Therefore, the device for real-time measurement of the permeability of compost covering film according to the embodiment of the present invention has the advantages of being easy to carry, convenient to operate and highly flexible to use.

[0036] In some embodiments, a first air pump 13 is disposed in the first inner cavity 10 , and the first air pump 13 is connected to the air inlet 19 .

[0037] The air inlet 19 is disposed on the bottom surface or the side surface of the first detection box 1 , and the air outlet 28 is disposed on the top surface or the side surface of the second detection box 2 .

[0038] The first inner cavity 10 is inflated with gas by the first air pump 13 so as to achieve accurate control of the internal gas environment of the first detection box 1 and ensure the stability of the gas flow and pressure during the test.

[0039] For example, the device for real-time measurement of the permeability of the compost covering film includes a controller, which can be used to control the working state of the first air pump 13, and a flow detector is provided in the first air pump 13, so as to facilitate real-time monitoring and adjustment of the gas flow to meet different testing requirements.

[0040] In some embodiments, the first detection box 1 has a first end surface 14 , the first opening 11 is disposed on the first end surface 14 , and an annular first magnet 15 is disposed on the first end surface 14 .

[0041] The second detection box 2 has a second end surface 23 , the second opening 21 is arranged on the second end surface 23 , and an annular second magnet 24 is arranged on the second end surface 23 .

[0042] The first magnet 15 and the second magnet 24 can be attached to each other.

[0043] For example, Figure 3 and Figure 4 As shown, the end surface of the first detection box 1 where the first opening 11 is arranged is a first end surface 14 , and an annular first magnet 15 is arranged on the first end surface 14 along the circumference of the first opening 11 .

[0044] The end surface of the second detection box 2 where the second opening 21 is arranged is a second end surface 23 . On the second end surface 23 , an annular second magnet 24 is arranged along the circumference of the second opening 21 .

[0045] When the first test box 1 and the second test box 2 are fitted together, the first magnet 15 and the second magnet 24 can be tightly adsorbed together to form a uniform and firm sealing interface, which not only ensures the sealing performance between the test film 3 and the first test box 1 and the second test box 2, but also ensures that the test film 3 will not be displaced or loosened during the detection process.

[0046] The device for real-time measurement of the permeability of compost covering film of the embodiment of the present invention, this magnetic attraction design not only simplifies the installation and replacement process of the film 3 to be tested, improves the convenience and efficiency of operation, but also ensures the sealing performance between the film 3 to be tested and the first detection box 1 and the second detection box 2. In addition, the design of the annular magnet makes the magnetic force distribution more uniform, avoids the damage to the film material that may be caused by the traditional mechanical fixing method, and at the same time enhances the overall stability and durability of the device for real-time measurement of the permeability of compost covering film, which is particularly suitable for rapid deployment on site.

[0047] In some embodiments, a first sealing ring 16 is disposed on the first end surface 14 . The first sealing ring 16 is disposed on the outer circumference of the first magnet 15 , and the surface of the first sealing ring 16 is flush with the surface of the first magnet 15 .

[0048] A second sealing ring 25 is disposed on the second end surface 23 . The second sealing ring 25 is disposed on the outer circumference of the second magnet 24 . The surface of the second sealing ring 25 is flush with the surface of the second magnet 24 .

[0049] For example, Figure 3 and Figure 4As shown, the first sealing ring 16 is located on the outer peripheral side of the first magnet 15, and its surface is flush with the surface of the first magnet 15, ensuring seamless connection and uniform force between the two. Similarly, a second sealing ring 25 is provided on the second end face 23, and the second sealing ring 25 is located on the outer peripheral side of the second magnet 24, and its surface is also flush with the surface of the second magnet 24, thereby forming a flat and tight contact surface.

[0050] The device for real-time measurement of the permeability of compost covering film in the embodiment of the present invention utilizes the first sealing ring 16 and the second sealing ring 25, which not only enhances the sealing performance of the first detection box 1 and the second detection box 2 when they are fitted together, effectively preventing leakage of the working gas, but also ensures the stability of the film layer 3 to be tested during the detection process and the airtightness of the test environment.

[0051] In addition, the surface of the first sealing ring 16 is flush with the surface of the first magnet 15 and the surface of the second sealing ring 25 is flush with the surface of the second magnet 24, ensuring that the first test box 1 and the second test box 2 will not be affected by protrusions or depressions when they are fitted together, thereby avoiding test errors caused by poor sealing.

[0052] In some embodiments, the first sensor assembly 12 includes a first housing 17 , in which a first concentration sensor, a first humidity sensor, and a first pressure sensor are disposed. There are multiple first concentration sensors so as to test the concentrations of multiple gases.

[0053] The second sensor assembly 22 includes a second housing 26 , in which a second concentration sensor, a second humidity sensor and a second pressure sensor are disposed. There are multiple second concentration sensors so as to test the concentrations of multiple gases.

[0054] For example, Figure 3 and Figure 4 As shown, a first humidity sensor, a first pressure sensor and a plurality of first concentration sensors are integrated on the first housing 17 , thereby comprehensively monitoring the environmental parameters in the first inner cavity 10 .

[0055] The second housing 26 is integrated with a second humidity sensor, a second pressure sensor, and a plurality of second concentration sensors, so as to comprehensively monitor the environmental parameters in the second inner cavity 20 .

[0056] Optionally, each first concentration sensor is used to detect the concentration of one gas, and multiple first concentration sensors can detect the concentrations of multiple gases at the same time, such as , , ammonia, hydrogen sulfide, carbon dioxide and sulfur dioxide, etc., to ensure accurate monitoring of different gas components. Similarly, multiple second concentration sensors can detect the concentration of multiple gases at the same time.

[0057] The device for real-time measurement of the permeability of compost covering membrane in the embodiment of the present invention can evaluate the membrane's permeability, moisture permeability and other properties in real time through the design of dual-side synchronous monitoring, so that further measures can be taken in time to optimize composting conditions and improve composting efficiency and product quality.

[0058] In some embodiments, the first detection box 1 includes a first data acquisition module, and the first sensor assembly 12 and the first air pump 13 are both connected to the first data acquisition module.

[0059] The second detection box 2 includes a second data acquisition module, and the second sensor component 22 is electrically connected to the second data acquisition module.

[0060] For example, the first humidity sensor, the first pressure sensor and multiple first concentration sensors in the first sensor assembly 12 transmit the detected data (such as gas concentration, humidity and pressure) to the first data acquisition module, and the first air pump 13 also transmits the collected gas flow parameters to the first data acquisition module.

[0061] Likewise, the second humidity sensor, the second pressure sensor, and the plurality of second concentration sensors in the second sensor assembly 22 transmit the detection data in the second inner cavity 20 to the second data acquisition module.

[0062] This integrated design not only improves the efficiency and accuracy of data collection, but also enables the first detection box 1 and the second detection box 2 to automatically adapt to different testing requirements and provide accurate real-time feedback.

[0063] Optionally, the first data acquisition module and the second data acquisition module can also be connected to the cloud processor wirelessly or wired to achieve remote transmission and centralized management of data. Users can access and analyze these data at any location and at any time to further optimize ventilation conditions and other operating parameters during the composting process. This design not only simplifies on-site operations, but also enhances the flexibility and scalability of the system. It is particularly suitable for rapid on-site deployment and real-time monitoring of the performance parameters of the compost surface film layer, thereby timely optimizing ventilation conditions, improving composting uniformity and efficiency, and reducing energy consumption and costs.

[0064] In some embodiments, the first data acquisition module includes a first display screen 18 , and the first display screen 18 is disposed on the outer surface of the first detection box 1 .

[0065] The second data acquisition module includes a second display screen 27 , and the second display screen 27 is disposed on the outer surface of the second detection box 2 .

[0066] For example, Figure 1As shown, the first display screen 18 and the second display screen 27 are used to conveniently view key parameters such as gas concentration, humidity and pressure in the first inner cavity 10 or the second inner cavity 20, thereby facilitating the recording and collection of data.

[0067] In some embodiments, the device for real-time measurement of compost covering film permeability includes a cloud processor, and the first data acquisition module and the second data acquisition module are both electrically connected to the cloud processor.

[0068] For example, the first data acquisition module is responsible for collecting environmental parameters such as gas concentration, humidity and pressure inside the first detection box 1, and transmitting these data to the cloud processor in real time. Similarly, the second data acquisition module is also responsible for collecting corresponding parameters inside the second detection box 2 and transmitting them to the same cloud processor.

[0069] The device for real-time determination of the permeability of compost covering film in the embodiment of the present invention is designed so that users can access and analyze the data from the first detection box 1 and the second detection box 2 through the Internet at any place and at any time, ensuring the centralized management and sharing of data, thereby providing users with an intelligent, automated and reliable detection solution, and promoting the development of composting technology to a higher level of automation and intelligence.

[0070] The embodiment of the present invention discloses a method for real-time measurement of permeability of a compost covering film, comprising: The first opening 11 of the first detection box 1 and the second opening 21 of the second detection box 2 are arranged to face each other.

[0071] The film to be tested 3 is sandwiched between the first opening 11 and the second opening 21 .

[0072] The first magnet 15 and the second magnet 24 are attached to each other.

[0073] The first air pump 13 is started to fill the first inner cavity 10 with working gas.

[0074] The gas flow data Q when the first air pump 13 is in operation is recorded.

[0075] The difference ΔP between the first pressure sensor and the second pressure sensor is recorded.

[0076] The cloud processor calculates the results based on the numerical values.

[0077] The method for real-time measurement of permeability of compost covering film according to the embodiment of the present invention has the following specific operating steps: First, the first opening 11 and the second opening 21 of the first detection box 1 and the second detection box 2 are arranged face to face, and then the film to be tested 3 is placed between the first opening 11 and the second opening 21, and the annular first magnet 15 on the first end face 14 and the annular second magnet 24 on the second end face 23 are fitted to each other to form a uniform and firm sealing interface to ensure that the film to be tested 3 will not be displaced or loosened during the detection process. Next, start the first air pump 13 and fill the first inner cavity 10 of the first detection box 1 with working gas. As the gas is filled, the first air pump 13 automatically collects and records the flow data Q, which will be used for subsequent calculations and analysis. At the same time, the difference ΔP and the flow data Q of the first pressure sensor and the second pressure sensor are calculated based on the data on the cloud processor, or the first pressure sensor and the second pressure sensor respectively monitor the pressure changes on both sides of the membrane, and the operator calculates the difference ΔP between the two based on the data on the first display screen 18 and the second display screen 27.

[0078] In some embodiments, the cloud processor includes: The permeability of the membrane 3 to be tested is calculated according to the formula Permeability = Q × L / (A × ΔP), where: Permeability is the average gas permeability, in or ; L represents the thickness of the film 3 to be tested, in units of ; A represents the area of ​​the film 3 to be tested, in units of ; Q represents the flow rate of gas passing through the membrane 3 to be tested, that is, the flow rate of gas filled into the first inner cavity 10 when the first air pump 13 is running, and the unit is or .

[0079] ΔP is the pressure difference when the gas flows through the membrane 3 to be tested, and the unit is or .

[0080] For example, the cloud processor is set with a corresponding calculation degree according to the above formula. The operator inputs values ​​such as L and A before the test. During the test, the cloud processor can obtain values ​​such as Q and ΔP, and calculate the corresponding results.

[0081] The thickness L of the film 3 to be tested is The area A of the film to be tested 3 sandwiched between the first detection box 1 and the second detection box 2 is , the gas flow rate Q of the first air pump 13 is When the pressure value detected by the first pressure sensor is The pressure value detected by the second pressure sensor is , then ΔP is , put it into the formula and calculate the Permeability as .

[0082] In other embodiments, the gas membrane rejection rate can be calculated according to the following formula: Gas membrane retention rate (%) = [(gas concentration entering the membrane module - gas concentration discharged from the membrane module) / gas concentration entering the membrane module] × 100%; For example, the first concentration sensor and the second concentration sensor each include a methane concentration sensor, an ammonia concentration sensor, and a hydrogen sulfide concentration sensor.

[0083] The first concentration sensor detects that the concentrations of methane, ammonia and hydrogen sulfide in the first inner cavity 10 are 1 mg / L, 50 mg / L and 5 mg / L respectively, while the second concentration sensor detects that the concentrations of methane, ammonia and hydrogen sulfide in the second inner cavity 20 are 0.7 mg / L, 25 mg / L and 2.5 mg / L respectively. According to the gas membrane retention rate calculation formula, it is obtained that the methane retention rate is 30%, the ammonia retention rate is 50%, and the hydrogen sulfide retention rate is 50%.

[0084] 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 device for real-time measurement of permeability of compost covering film, characterized in that: include: A first detection box, wherein the first detection box has a first inner cavity and a first opening, a first sensor assembly is disposed in the first inner cavity, and an air inlet communicating with the first inner cavity is disposed on the first detection box; A second detection box, wherein the second detection box has a second inner cavity and a second opening, a second sensor assembly is disposed in the second inner cavity, and an air outlet communicated with the second inner cavity is disposed on the second detection box; The first opening and the second opening are arranged facing each other, and the first detection box and the second detection box are arranged in close contact with each other, so that the film to be tested can be sandwiched between the first detection box and the second detection box.

2. The device for real-time measurement of permeability of compost covering film according to claim 1, characterized in that: A first air pump is disposed in the first inner cavity, and the first air pump is connected to the air inlet.

3. The device for real-time measurement of permeability of compost covering film according to claim 1, characterized in that: The first detection box has a first end surface, the first opening is arranged on the first end surface, and a first annular magnet is arranged on the first end surface; The second detection box has a second end surface, the second opening is arranged on the second end surface, and a second annular magnet is arranged on the second end surface; The first magnet and the second magnet are capable of being attached to each other.

4. The device for real-time measurement of permeability of compost covering film according to claim 3, characterized in that: A first sealing ring is provided on the first end surface, the first sealing ring is provided on the outer peripheral side of the first magnet, and the surface of the first sealing ring is flush with the surface of the first magnet; A second sealing ring is disposed on the second end surface. The second sealing ring is disposed on the outer peripheral side of the second magnet. The surface of the second sealing ring is flush with the surface of the second magnet.

5. The device for real-time measurement of permeability of compost covering film according to any one of claims 1 to 4, characterized in that: The first sensor assembly comprises a first housing, in which a first concentration sensor, a first humidity sensor and a first pressure sensor are arranged, and the first concentration sensor is provided in plurality so as to test the concentration of multiple gases; The second sensor assembly includes a second shell, in which a second concentration sensor, a second humidity sensor and a second pressure sensor are arranged. There are multiple second concentration sensors so as to test the concentrations of multiple gases.

6. The device for real-time measurement of permeability of compost covering film according to claim 2, characterized in that: The first detection box includes a first data acquisition module, and the first sensor assembly and the first air pump are both connected to the first data acquisition module; The second detection box includes a second data acquisition module, and the second sensor component is electrically connected to the second data acquisition module.

7. The device for real-time measurement of permeability of compost covering film according to claim 6, characterized in that: The first data acquisition module includes a first display screen, which is arranged on the outer surface of the first detection box; the second data acquisition module includes a second display screen, which is arranged on the outer surface of the second detection box.

8. The device for real-time measurement of permeability of compost covering film according to claim 6 or 7, characterized in that: The device for real-time measurement of compost covering film permeability includes a cloud processor, and the first data acquisition module and the second data acquisition module are both electrically connected to the cloud processor.

9. A method for real-time measurement of compost covering film permeability, using the device for real-time measurement of compost covering film permeability according to any one of claims 1 to 8, characterized in that: include: Arrange the first opening of the first detection box and the second opening of the second detection box facing each other; The membrane to be tested is clamped between the first opening and the second opening; Fitting the first magnet to the second magnet; Starting the first air pump to fill the first inner cavity with working gas; Recording gas flow data Q when the first gas pump is in operation; Recording a difference ΔP between data collected by the first pressure sensor and the second pressure sensor; The cloud processor calculates the results based on the numerical values.

10. The method for real-time determination of permeability of compost covering film according to claim 9, characterized in that: The cloud processor includes, according to the numerical calculation result: The permeability of the membrane to be tested is calculated according to the formula Permeability = Q × L / (A × ΔP), where: Permeability is the average gas permeability, in or ; L represents the thickness of the film to be tested, in units of ; A represents the area of ​​the film to be tested, in units of ; Q, unit is or ; ΔP, in units of or .

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