Gas detection device and method for organic fermentation material

Abstract

The invention relates to the technical field of gas detection, and discloses a gas detection device and method.The gas detection device for organic fermentation materials comprises a piston assembly which can slide in a main body tank or be fixed in the main body tank in the first direction, an inlet valve of a first switching three-way valve is connected with a first pipeline, and an outlet valve of a second switching three-way valve is connected with a second pipeline; two outlet valves of the first switching three-way valve are respectively connected with a second pipeline and a fourth pipeline; two inlet valves of the second switching three-way valve are respectively connected with a third pipeline and a fourth pipeline, and an outlet valve of the second switching three-way valve is connected with a fifth pipeline; a gas inlet of the gas detection module is connected with the fifth pipeline, and a gas outlet of the gas detection module communicates with the containing space through a one-way valve. The invention provides a gas detection device and method for an organic fermentation material, which can quickly and continuously monitor the concentration change condition of fermentation gas of the organic fermentation material, and can judge the degree of decomposition of material fermentation under the conditions of aerobic fermentation and anaerobic fermentation.

Description

Technical Field

[0001] This invention relates to the field of gas detection technology, and in particular to a gas detection device and method for organic fermentation materials. Background Technology

[0002] Organic solid waste refers to solid waste containing a certain amount of organic matter, mainly originating from various fields such as agricultural production, food processing, and urban life. Organic solid waste is typically treated through composting and biological fermentation. During this fermentation process, different gases are produced depending on the environment. By measuring the changes in gas volume and concentration during fermentation, the degree of fermentation maturity of the material can be determined.

[0003] Currently, in existing gas detection devices for organic fermentation materials, referring to Chinese patent CN215179382U (publication date: December 14, 2021), the internal structure of the chamber, from left to right, consists of an air pump, an ultrasonic vibrator, a drying chamber, a weighing instrument, a processor, and a controller. Several grooves are located above the ultrasonic vibrator, and a reactor is placed in these grooves. During operation, the outlet of the air pump needs to be inserted into the reactor, which contains a standard solution. This allows external fermentation gases to be pumped into the reactor through the outlet of the air pump. The gases are then vibrated by the ultrasonic vibrator to form products. After washing and drying the products, the fermentation gas data is obtained by weighing. This makes it impossible to quickly and continuously monitor changes in the concentration of fermentation gases. Summary of the Invention

[0004] The purpose of this invention is to provide a gas detection device and method for organic fermentation materials, which can quickly and continuously monitor the concentration changes of fermentation gases in organic fermentation materials, and can determine the degree of fermentation maturity of materials under both aerobic and anaerobic fermentation conditions.

[0005] To achieve the above objectives, the present invention provides a gas detection device for organic fermentation materials, comprising: The main tank is provided with an air inlet valve and an air outlet valve, and the air outlet valve is connected to a first pipe. A piston assembly, which can slide in the main body tank or be fixed in the main body tank along a first direction, and a receiving space for placing organic fermentation materials is formed between the bottom of the piston assembly and the main body tank. A gas storage module, wherein the gas storage module is provided with an elastic gas chamber, and the gas sampling valve port and the gas venting valve port of the gas storage module are both connected to the elastic gas chamber. The gas sampling valve port is connected to a second pipe, and the gas venting valve port is connected to a third pipe. The first three-way valve is connected to the first pipeline, and the two outlet valves of the first three-way valve are connected to the second pipeline and the fourth pipeline, respectively. The second adapter three-way valve has two inlet valves connected to the third and fourth pipelines respectively, and the outlet valve of the second adapter three-way valve is connected to the fifth pipeline. A gas detection module, the gas inlet of which is connected to the fifth pipe, and the gas outlet of which is connected to the accommodating space via a one-way valve.

[0006] Preferably, the main body can has an opening at the top, and the top edge of the main body can extends outward to form an extension portion; The gas detection device also includes a fixing frame, which includes a central part and multiple branch parts. The central part is coaxial with the main body tank, and the branch parts extend radially along the main body tank. One end of each branch part is connected to the central part. Multiple branch parts are symmetrically distributed around the central part. Each branch part is detachably mounted on the extension part, and a mounting hole penetrating along a first direction is provided on each branch part. The piston assembly includes a piston disc and multiple piston rods; The piston disc is located inside the main body tank, the edge of the piston disc is attached to the inner side wall of the main body tank, and the accommodating space is formed between the bottom of the piston disc and the main body tank; The piston rod extends along a first direction, and the plurality of piston rods pass through the plurality of mounting holes one by one. The piston rod can slide along the first direction in the mounting hole or be fixed in the mounting hole. The bottom end of the piston rod is connected to the piston disc.

[0007] Preferably, a first insertion hole extending in a second direction is provided on the side wall of the branch, and the first insertion hole communicates with the mounting hole; A second insertion hole extending in a second direction is provided on the side wall of the piston rod; The gas detection device also includes a locking bolt, which is used to pass through the first insertion hole and the second insertion hole; The second direction is located on a plane perpendicular to the first direction.

[0008] Preferably, the branch portion has a first fixing hole extending through in the first direction, and the extension portion has a second fixing hole extending through in the first direction; The gas detection device also includes a fixing bolt, which is used to pass through the first fixing hole and the second fixing hole.

[0009] Preferably, a sealing ring is attached to the circumferential edge of the piston disc, and the sealing ring is attached to the inner wall of the main tank.

[0010] Preferably, it further includes: A diaphragm pump, the outlet of which is connected to the accommodating space via a one-way valve, and the inlet of which is connected to the outlet of the gas detection module.

[0011] Preferably, the diaphragm pump is provided in multiple locations; The gas detection device further includes: A multi-way valve is provided, which has an inlet valve and multiple outlet valves. The outlet of the gas detection module is connected to the inlet valve of the multi-way valve, and the multiple outlet valves of the multi-way valve are respectively connected to the suction ports of multiple diaphragm pumps.

[0012] Preferably, the second pipeline includes a first branch pipeline and a second branch pipeline. The first branch pipeline is connected to the outlet valve of the first transfer three-way valve, and the second branch pipeline is connected to the gas sampling valve port. An air bubble pool is connected between the first branch pipeline and the second branch pipeline, and a check valve is provided in the air bubble pool. The third pipeline includes a third branch pipeline and a fourth branch pipeline. The third branch pipeline is connected to the vent valve port, and the fourth branch pipeline is connected to the inlet valve of the second transfer three-way valve. An air bubble pool is connected between the third branch pipeline and the fourth branch pipeline, and a check valve is provided in the air bubble pool.

[0013] This invention provides a gas detection method for organic fermentation materials, implemented based on the aforementioned gas detection device for organic fermentation materials, and includes the following steps: S1: Place the organic fermentation material into the containment space of the main tank; S2: Determine whether the material is undergoing aerobic fermentation. If yes, proceed to step S4; otherwise, proceed to step S3. S3: The fermentation gas in the containment space flows back to the containment space through the first path, and the fermentation gas is detected by the gas detection module when it passes through the gas detection module on the first path, and step S5 is executed. S4: A portion of the fermentation gas in the containment space flows back to the containment space through the first path, and another portion of the fermentation gas flows back to the containment space through the second path. When the fermentation gas passes through the gas detection modules on the first and second paths, it is detected by the gas detection modules, and step S5 is executed. S5: Obtain the gas type and its corresponding concentration detection data from the gas detection module to complete the gas detection.

[0014] Preferably, step S2 specifically includes: S21: Determine whether the material is undergoing aerobic fermentation. If yes, proceed to step S4; otherwise, proceed to step S22. S22: Determine whether the pressure inside the main tank is required to be the same as the external atmospheric pressure. If yes, proceed to step S30; otherwise, proceed to step S3. Also includes: S30: A portion of the fermentation gas in the containment space flows back to the containment space through the first path, and another portion of the fermentation gas flows back to the containment space through the second path. When the fermentation gas passes through the gas detection modules on the first and second paths, it is detected by the gas detection modules, and step S5 is executed.

[0015] Compared with the prior art, the gas detection device for organic fermentation materials provided in this embodiment of the invention has the following advantages: This application places organic fermentation material within a containment space. By switching the bottom of the piston assembly to contact the material or maintain a preset distance from the material, and by switching the piston assembly's ability to slide along a first direction within or be fixed within the main tank, as well as by switching the opening and closing of the gas sampling valve and venting valve of the gas storage module, the conditions for anaerobic or aerobic fermentation can be switched, allowing for the detection of fermentation gases from the organic fermentation material. After being detected by the gas detection module through different paths, the fermentation gases flow back into the containment space of the main tank. The detection process is rapid and can continuously monitor changes in the concentration of fermentation gases. By analyzing the detection data from the gas detection module, the types of gases and their corresponding concentration changes under aerobic or anaerobic fermentation conditions can be analyzed, thereby determining the degree of fermentation maturity of the material. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the gas detection device for organic fermentation materials according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of a gas detection device for organic fermentation materials from another perspective, as described in an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of a gas detection device for organic fermentation materials from another perspective, as described in an embodiment of the present invention; Figure 4 This is a flowchart of the gas detection method for organic fermentation materials according to an embodiment of the present invention; Figure 5 This is a flowchart of a gas detection method for organic fermentation materials according to another embodiment of the present invention; In the diagram, 1. Main tank; 101. Inlet valve; 102. Outlet valve; 103. Extension; 2. Piston assembly; 201. Piston disc; 202. Piston rod; 3. Gas storage module; 301. Gas sampling valve; 302. Gas venting valve; 4. First three-way valve; 5. Second three-way valve; 6. Gas detection module; 7. First pipeline; 8. Second pipeline; 9. Third pipeline; 10. Fourth pipeline; 11. Fifth pipeline; 12. Fixing frame; 121. Central part; 122. Branch part; 13. Locking bolt; 14. Fixing bolt; 15. Sealing ring; 16. Diaphragm pump; 17. Multi-way valve; 18. Pour port; 19. Sealing cover; 20. Bubble tank. Detailed Implementation

[0017] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0018] In the description of this invention, it should be understood that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this invention based on the specific circumstances.

[0019] In the description of this invention, it should be understood that the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," "longitudinal," "X-axis direction," "Y-axis direction," and "Z-axis direction," etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention. Moreover, some of the above terms, in addition to indicating orientations or positional relationships, may also be used to indicate other meanings; for example, the term "upper" may in some cases be used to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances.

[0020] like Figure 1-3As shown, an organic fermentation material gas detection device according to Embodiment 1 of the present invention includes: a main tank 1, a piston assembly 2, a gas storage module 3, a first transfer three-way valve 4, a second transfer three-way valve 5, and a gas detection module 6. The main tank 1 is provided with an air inlet valve 101 and an air outlet valve 102, and the air outlet valve 102 is connected to a first pipe 7. The piston assembly 2 can slide within the main body tank 1 or be fixed within the main body tank 1 along the first direction X, and a accommodating space for placing organic fermentation materials is formed between the bottom of the piston assembly 2 and the main body tank 1. The gas storage module 3 is provided with an elastic gas chamber. The gas sampling valve 301 and the gas venting valve 302 of the gas storage module 3 are both connected to the elastic gas chamber (not shown in the figure). The gas sampling valve 301 is connected to the second pipe 8, and the gas venting valve 302 is connected to the third pipe 9. The inlet valve of the first three-way valve 4 is connected to the first pipeline 7, and the two outlet valves of the first three-way valve 4 are connected to the second pipeline 8 and the fourth pipeline 10 respectively. The two inlet valves of the second transition three-way valve 5 are connected to the third pipe 9 and the fourth pipe 10 respectively, and the outlet valve of the second transition three-way valve 5 is connected to the fifth pipe 11. The gas detection module 6 has its inlet connected to the fifth pipe 11, and its outlet connected to the accommodating space via a one-way valve.

[0021] It should be noted that when placing the organic fermentation material in the containment space and detecting the gas during anaerobic fermentation, the gas intake valve 301 and exhaust valve 302 of the gas storage module 3 are closed, the gas inlet valve 101 of the main tank 1 is opened, the piston assembly 2 is slid to its bottom to contact the material, the gas inlet valve 101 is closed, and the gas outlet valve 102 of the main tank 1 is opened. After that, the fermentation environment of the material is basically free of oxygen.

[0022] The material inside the main tank 1 undergoes anaerobic fermentation, generating gases such as NH3, CH4, and H2S. The expansion of the fermentation gases pushes the piston assembly 2 to slide along the first direction X, increasing the volume of the containment space and creating a positive pressure environment. The fermentation gases are discharged from the outlet valve 102 and sequentially enter the first pipe 7, the first three-way valve 4, the fourth pipe 10, the second three-way valve 5, the fifth pipe 11, and the gas detection module 6 along the first path, before flowing back into the containment space. The return of the fermentation gases to the containment space of the main tank 1 continues to push the piston assembly 2 to slide along the first direction X, which accelerates gas flow and prevents local accumulation. When detecting the gas during aerobic fermentation of the material, open the gas sampling valve 301 and the gas venting valve 302 of the gas storage module 3, open the gas inlet valve 101 of the main tank 1, slide the piston assembly 2 along the first direction X until there is a preset distance between its bottom and the material, then fix the piston assembly 2, close the gas inlet valve 101, and open the gas outlet valve 102.

[0023] The material in the main tank 1 undergoes aerobic fermentation, generating CO2, H2O, and energy. A portion of the fermentation gas is discharged from the outlet valve 102 and then sequentially enters the first pipeline 7, the first three-way valve 4, the fourth pipeline 10, the second three-way valve 5, the fifth pipeline 11, and the gas detection module 6 along the first path, before flowing back to the containment space. Another portion of the fermentation gas is discharged from the outlet valve 102 and then sequentially enters the first pipeline 7, the first three-way valve 4, the second pipeline 8, the gas sampling valve 301, the gas storage module 3, the venting valve 302, the third pipeline 9, the second three-way valve 5, the fifth pipeline 11, and the gas detection module 6 along the second path, before flowing back to the containment space.

[0024] The fermentation gas is detected by the gas detection module 6, which detects the types of gases and their corresponding concentrations. Users can quickly and continuously monitor the changes in the concentration of fermentation gases. By analyzing the detection data of the gas detection module 6, the types of gases and their corresponding concentration changes under aerobic or anaerobic fermentation conditions can be analyzed, thereby determining the degree of fermentation maturity of the material.

[0025] The gas storage module 3 is equipped with a flexible gas chamber with a variable volume. Therefore, when the gas storage module 3 is connected to the main tank 1, the flexible gas chamber can absorb pressure fluctuations and maintain the pressure balance of the entire device. Furthermore, when the positive pressure in the main tank 1 is greater than 0.2 kPa, excess gas can be automatically stored in the flexible gas chamber to avoid the risk of overpressure.

[0026] The gas storage module 3 is preferably a gas storage bag, which has an elastic gas cavity inside and is simple in structure and easy to use. In addition, pre-filling the gas storage module 3 with gas can supply more gas when the material requires more gas for aerobic fermentation.

[0027] The outlet of the gas detection module 6 is connected to the containment space through a one-way valve, which can prevent the gas in the containment space from being discharged into the channel connecting the outlet of the gas detection module 6 and the containment space, and ensure that the fermentation gas generated by the material is discharged from the outlet valve 102.

[0028] When the bottom of piston assembly 2 contacts the material (i.e., the lower surface of piston assembly 2 is flush with the upper surface of the material), the material cannot come into contact with oxygen for fermentation, thus creating an anaerobic environment.

[0029] When the air inlet valve 101 of the main tank 1 is opened, the piston assembly 2 is slid along the first direction X until there is a preset distance between its bottom and the material, and then the piston assembly 2 is fixed. Gas enters the containment space from the air inlet valve 101. When the air inlet valve 101 is closed, oxygen is present in the containment space, and the material can ferment in an aerobic environment.

[0030] Furthermore, the gas detection module 6 includes gas sensors, such as electrochemical gas sensors, infrared absorption sensors, and semiconductor gas sensors, which can convert gas components into electrical signals and display the types and concentrations of gases in real time. This allows for the determination of oxygen consumption and carbon dioxide generation during aerobic fermentation of materials, or the determination of methane and hydrogen sulfide generation during anaerobic fermentation. If hydrogen sulfide exceeds the standard, it indicates oxygen deficiency and spoilage.

[0031] Furthermore, the main body tank 1 is made of a transparent material, such as acrylic, so that the operator can observe the position of the piston assembly 2 inside the main body tank 1 from the outside of the main body tank 1.

[0032] The main tank 1 underwent a sealing test at 1.5 times the working pressure, and its pressure range is 0-0.3 MPa.

[0033] Furthermore, the main tank 1 is equipped with multiple air inlet valves 101, such as... Figure 1 As shown, the main tank 1 is equipped with two air inlet valves 101.

[0034] In this embodiment, the top of the main body can 1 is open, and the top edge of the main body can 1 extends outward to form an extension 103. The gas detection device also includes a mounting frame 12, which includes a central portion 121 and multiple branches 122. The central portion 121 is coaxial with the main body tank 1, and the branches 122 extend radially along the main body tank 1. One end of each branch 122 is connected to the central portion 121. The multiple branches 122 are symmetrically distributed with respect to the central portion 121. The branches 122 are detachably mounted on the extension portion 103. The branches 122 have mounting holes (not shown in the figure) that extend through the first direction X. Piston assembly 2 includes piston disc 201 and multiple piston rods 202; Piston disc 201 is located inside main tank 1, with the edge of piston disc 201 fitting against the inner wall of main tank 1, and a receiving space formed between the bottom of piston disc 201 and main tank 1. The piston rod 202 extends along the first direction X, and multiple piston rods 202 pass through multiple mounting holes one by one. The piston rod 202 can slide along the first direction X in the mounting hole or be fixed in the mounting hole. The bottom end of the piston rod 202 is connected to the piston disc 201.

[0035] It should be noted that the fixing frame 12 includes a central part 121 coaxial with the main body tank 1, and a plurality of branches 122 extending radially along the main body tank 1 are symmetrically distributed with respect to the central part 121 and connected at one end to the central part 121. The branches 122 are detachably mounted on the extension 103 extending outward from the top edge of the main body tank 1, so that the fixing frame 12 can be detachably mounted on the top of the main body tank 1. When it is necessary to replace the fixing frame 12, the fixing frame 12 can be removed from the main body tank 1.

[0036] Multiple piston rods 202 extending along the first direction X are passed through mounting holes on the branch 122 that extend along the first direction X. Therefore, the mounting holes of the branch 122 can limit the sliding direction of the piston rods 202, and the piston rods 202 can slide along the first direction X in the mounting holes.

[0037] The piston disc 201 is located inside the main tank 1 and its edge is attached to the inner sidewall of the main tank 1, so the piston disc 201 and the main tank 1 are coaxial. Since multiple piston rods 202 and multiple branches 122 correspond to each other, the positions where the bottom ends of multiple piston rods 202 connect to the piston disc 201 are symmetrically distributed around the center of the piston disc 201. Therefore, when multiple piston rods 202 slide along the first direction X, the piston disc 201 can also slide stably along the first direction X, realizing that the piston assembly 2 slides stably in the main tank 1 along the first direction X.

[0038] Since the top opening of the main body tank 1 and the extension 103 extending outward from the top edge of the main body tank 1 will not affect the top opening of the main body tank 1, when the fixing bracket 12 is removed from the main body tank 1, the piston disc 201 and piston rod 202 can also be removed from the main body tank 1 along the first direction X for replacement.

[0039] When the piston rod 202 is fixed in the mounting hole, that is, when the piston rod 202 is fixed on the fixing bracket 12, and the fixing bracket 12 is installed on the extension 103 of the main body tank 1, the piston rod 202 can be fixed relative to the main body tank 1, and the piston disc 201 is also fixed relative to the main body tank 1, so that the piston assembly 2 is fixed inside the main body tank 1.

[0040] The bottom of piston assembly 2 is the bottom of piston disc 201. When the bottom of piston disc 201 contacts the material (i.e., the lower surface of piston disc 201 is flush with the upper surface of the material), the material cannot come into contact with oxygen for fermentation, thus creating an anaerobic environment.

[0041] In this embodiment, the branch 122 is further provided with a first insertion hole (not shown in the figure) extending in the second direction on its side wall, and the first insertion hole communicates with the mounting hole (not shown in the figure). A second insertion hole (not shown in the figure) extending in the second direction is provided on the side wall of the piston rod 202. The gas detection device also includes a locking bolt 13, which is used to pass through the first insertion hole and the second insertion hole; The second direction is located on a plane perpendicular to the first direction X.

[0042] It should be noted that when the locking bolt 13 is inserted into the mounting hole through the first insertion hole on the side wall of the branch 122 along the second direction, and the piston rod 202 passes through the mounting hole, the locking bolt 13 can pass through the second insertion hole when the second insertion hole on the side wall of the piston rod 202 is aligned with the first insertion hole, thus fixing the piston rod 202 and the fixing bracket 12. The piston rod 202 cannot slide in the mounting hole along the first direction X. When the locking bolt 13 is removed, the piston rod 202 can slide in the mounting hole along the first direction X, realizing the detachable installation of the piston rod 202 and the fixing bracket 12.

[0043] Furthermore, the second direction, the first direction X, and the radial direction of the main body tank 1 intersect each other perpendicularly, so that the locking bolt 13 can be inserted into the first insertion hole and the second insertion hole more smoothly.

[0044] Furthermore, two second insertion holes extending in a second direction are provided on the side wall of the piston rod 202, and the two second insertion holes are arranged sequentially in a first direction. When the bottom of the piston disc 201 contacts the material and it is necessary to fix the piston disc 201, the locking bolt 13 is passed through the first insertion hole and one of the second insertion holes; when there is a preset distance between the bottom of the piston disc 201 and the material and it is necessary to fix the piston disc 201, the locking bolt 13 is passed through the first insertion hole and the other second insertion hole.

[0045] In this embodiment, the branch portion 122 is further provided with a first fixing hole (not shown in the figure) extending through the first direction X, and the extension portion 103 is provided with a second fixing hole (not shown in the figure) extending through the first direction X. The gas detection device also includes a fixing bolt 14, which is used to pass through the first fixing hole and the second fixing hole.

[0046] It should be noted that the branch portion 122 has a first fixing hole extending along the first direction X, and the extension portion 103 has a second fixing hole extending along the first direction X, thereby aligning the first fixing hole and the second fixing hole in the first direction X. The fixing bolt 14 passes through the first fixing hole and the second fixing hole, assembling the branch portion 122 of the fixing frame 12 and the extension portion 103 of the main body tank 1. When the fixing bolt 14 is removed, the branch portion 122 of the fixing frame 12 can be detached from the extension portion 103 of the main body tank 1, realizing that the branch portion 122 can be detachably installed on the extension portion 103.

[0047] Furthermore, it also includes a top cover (not shown in the figure), which has a third fixing hole extending through the first direction X, and is used to close the top opening of the main body tank 1. After removing the fixing bracket 12, piston rod 202 and piston disc 201 from the main body tank 1, the top cover can be placed on top of the main body tank 1, and the third fixing hole can be aligned with the first fixing hole of the extension 103 for bolt fixing to vacuum seal the main body tank 1.

[0048] In this embodiment, the piston disc 201 is further provided with a sealing ring 15 along its circumferential edge, and the sealing ring 15 fits against the inner wall of the main body tank 1.

[0049] It should be noted that the piston disc 201 is attached to the circumferential edge with a sealing ring 15, which fits against the inner wall of the main body tank 1. As a result, when the piston disc 201 slides in the main body tank 1 in the first direction X, the gas is not easy to flow out from the gap between the piston disc 201 and the inner wall of the main body tank 1, thereby improving the airtightness of the device and effectively ensuring the smooth operation of gas detection.

[0050] In this embodiment, it further includes: a diaphragm pump 16, the outlet of which is connected to the accommodating space through a one-way valve, and the inlet of which is connected to the outlet of the gas detection module 6.

[0051] It should be noted that the outlet of the diaphragm pump 16 is connected to the containment space via a one-way valve, and the inlet of the diaphragm pump 16 is connected to the outlet of the gas detection module 6. When the fermentation gas flows along the pipeline path, impurities such as solid particles of the fermentation material may enter the pipeline path along with the fermentation gas. The fluid channel of the diaphragm pump 16 adopts a smooth pump chamber and diaphragm structure, which can reduce the risk of impurities remaining inside the pump body, thereby effectively avoiding impurities clogging the channel and facilitating the smooth return of fermentation gas to the containment space.

[0052] The diaphragm pump 16 is located outside the main tank 1, meeting explosion-proof requirements and allowing the handling of flammable and explosive gases such as methane. As the fermentation of the material produces fermentation gases, a positive pressure is generated inside the main tank 1. This pressure difference drives the piston movement of the diaphragm pump 16, actively drawing in the gas. The reciprocating motion of the diaphragm pump 16 creates a directional airflow, accelerating the gas flow along its corresponding path. The diaphragm pump 16 adopts an Ex ia-level explosion-proof design.

[0053] In this embodiment, the diaphragm pump 16 is further provided with multiple diaphragm pumps; The gas detection device also includes a multi-way valve 17, which has an inlet valve and multiple outlet valves. The outlet of the gas detection module 6 is connected to the inlet valve of the multi-way valve 17, and the multiple outlet valves of the multi-way valve 17 are respectively connected to the suction ports of multiple diaphragm pumps 16.

[0054] It should be noted that, in order to prevent the fermentation gas from failing to flow back into the containment space when one diaphragm pump 16 stops running, multiple diaphragm pumps 16 are set up in parallel, and multiple different outlet valves of the multi-way valve 17 are respectively connected to the inlet of multiple diaphragm pumps 16. The fermentation gas can be dispersed from different gas paths. When one diaphragm pump 16 stops running, the other diaphragm pumps 16 can still run, avoiding poor ventilation and facilitating the smooth flow of fermentation gas back.

[0055] In this embodiment, the second pipeline 8 further includes a first branch pipeline (not shown in the figure) and a second branch pipeline (not shown in the figure). The first branch pipeline is connected to the outlet valve of the first transfer three-way valve 4, and the second branch pipeline is connected to the gas sampling valve port 301. A bubble pool 20 is connected between the first branch pipeline and the second branch pipeline, and a check valve is provided in the bubble pool 20. The third pipe 9 includes a third branch pipe (not shown in the figure) and a fourth branch pipe (not shown in the figure). The third branch pipe is connected to the vent valve port 302, and the fourth branch pipe is connected to the inlet valve of the second transfer three-way valve 5. An air bubble pool 20 is connected between the third branch pipe and the fourth branch pipe, and a check valve is installed in the air bubble pool 20.

[0056] It should be noted that the second pipe 8 includes a first branch pipe and a second branch pipe. The bubble pool 20 is connected between the first branch pipe and the second branch pipe. Therefore, by observing whether the bubble pool 20 produces bubbles, it can be determined whether fermentation gas is produced and passes through the second pipe 8.

[0057] The third pipe 9 includes a third branch pipe and a fourth branch pipe. The bubble pool 20 is connected between the third branch pipe and the fourth branch pipe. By observing whether bubbles are generated in the bubble pool 20, it can be determined whether the fermentation gas has passed smoothly through the gas storage module 3 and the third pipe 9, and whether the gas is flowing normally, which is conducive to the smooth progress of gas detection.

[0058] The bubble tank 20 is equipped with a check valve to ensure that the fermentation gas flows unidirectionally along the prescribed second path.

[0059] Furthermore, a bracket is installed on the outer wall of the main tank 1, and the bubble pool 20 is installed on the bracket.

[0060] In this embodiment, the main tank 1 is further provided with a pouring port 18 on its side wall, the pouring port 18 is connected to the accommodating space, and a sealing cap 19 is installed on the pouring port 18.

[0061] It should be noted that waste liquid may be generated after the organic fermentation material ferments. Opening the sealing cap 19 allows the waste liquid to be poured out from the pouring port 18. Closing the sealing cap 19 seals the pouring port 18, effectively ensuring the airtightness of the main tank 1.

[0062] like Figure 1-4 As shown, Embodiment 2 of the present invention provides a gas detection method for organic fermentation materials, implemented based on the aforementioned gas detection device for organic fermentation materials, comprising the following steps: S1: Place the organic fermentation material in the containment space of the main tank 1; S2: Determine whether the material is undergoing aerobic fermentation. If yes, proceed to step S4; otherwise, proceed to step S3. S3: The fermentation gas in the containment space flows back to the containment space through the first path, and the fermentation gas is detected by the gas detection module 6 when it passes through the gas detection module 6 on the first path, and step S5 is executed. Specifically: Close the gas sampling valve 301 and the gas venting valve 302 of the gas storage module 3, open the gas inlet valve 101 of the main tank 1, slide the piston assembly 2 to its bottom to contact the material, close the gas inlet valve 101, open the gas outlet valve 102 of the main tank 1, the fermentation gas in the containment space flows back to the containment space through the first path, and the fermentation gas is detected by the gas detection module 6 when it passes through the gas detection module 6 on the first path, and execute step S5. The first path is the gas outlet valve 102, which discharges and sequentially enters the first pipe 7, the first three-way valve 4, the fourth pipe 10, the second three-way valve 5, the fifth pipe 11 and the gas detection module 6. S4: A portion of the fermentation gas in the containment space flows back to the containment space through the first path, and another portion of the fermentation gas flows back to the containment space through the second path. When the fermentation gas passes through the gas detection module 6 on the first path and the second path, it is detected by the gas detection module 6, and step S5 is executed. Specifically: Open the gas sampling valve 301 and the gas venting valve 302 of the gas storage module 3, open the gas inlet valve 101 of the main tank 1, slide the piston assembly 2 to a preset distance between its bottom and the material, then fix the piston assembly 2, close the gas inlet valve 101, open the gas outlet valve 102 of the main tank 1, a portion of the fermentation gas in the containment space flows back to the containment space through the first path, and another portion of the fermentation gas flows back to the containment space through the second path. When the fermentation gas passes through the gas detection modules 6 on the first and second paths, it is detected... The gas detection module 6 detects and executes step S5. The first path is that the gas is discharged from the outlet valve 102 and sequentially enters the first pipeline 7, the first three-way valve 4, the fourth pipeline 10, the second three-way valve 5, the fifth pipeline 11 and the gas detection module 6. The second path is that after being discharged from the outlet valve 102, the gas is sequentially entered into the first pipeline 7, the first three-way valve 4, the second pipeline 8, the gas sampling valve 301, the gas storage module 3, the gas venting valve 302, the third pipeline 9, the second three-way valve 5, the fifth pipeline 11 and the gas detection module 6. S5: Obtain the gas type and its corresponding concentration detection data from the gas detection module to complete the gas detection.

[0063] It should be noted that in this application, the organic fermentation material is placed in the containment space. By switching the bottom of the piston assembly 2 to contact the material or to maintain a preset distance from the material (the preset distance is greater than 0), and by switching the state in which the piston assembly 2 can slide along the first direction X inside the main tank 1 or be fixed inside the main tank 1, and by switching the opening and closing of the gas sampling valve 301 and the gas venting valve 302 of the gas storage module 3, the conditions of anaerobic or aerobic fermentation can be switched, and the fermentation gas of the organic fermentation material can be detected.

[0064] After the fermentation gases of the material are detected by the gas detection module 6 through different paths, they flow back into the containment space of the main tank 1. The detection process is fast and can continuously monitor the concentration changes of the fermentation gases. By analyzing the detection data of the gas detection module 6, the types of gases and their corresponding concentration changes under aerobic or anaerobic fermentation conditions can be analyzed, thereby determining the degree of fermentation maturity of the material.

[0065] In step S2, it is determined whether the material is undergoing aerobic fermentation. If so, the conditions for aerobic fermentation are created by executing step S4; otherwise, the conditions for anaerobic fermentation are created by executing step S3.

[0066] In step S3, when the fermentation gas expands, the volume of the accommodating space of the main tank 1 increases, forming a positive pressure environment, so that the fermentation gas will be discharged from the gas outlet 102.

[0067] like Figure 1-5 As shown, the gas detection method for organic fermentation materials in Embodiment 3 of the present invention differs from the gas detection method for organic fermentation materials in Embodiment 2 in that step S2 is different: Step S2 specifically includes: S21: Determine whether the material is undergoing aerobic fermentation. If yes, proceed to step S4; otherwise, proceed to step S22. S22: Determine whether the pressure inside the main tank 1 is required to be the same as the external atmospheric pressure. If yes, proceed to step S30; otherwise, proceed to step S3. Also includes: S30: A portion of the fermentation gas in the containment space flows back to the containment space through the first path, and another portion of the fermentation gas flows back to the containment space through the second path. When the fermentation gas passes through the gas detection module 6 on the first path and the second path, it is detected by the gas detection module 6, and step S5 is executed. Specifically, the gas sampling valve 301 and the gas venting valve 302 of the gas storage module 3 are opened, the gas inlet valve 101 of the main tank 1 is opened, the piston assembly 2 is slid until its bottom contacts the material and then fixed, the gas inlet valve 101 is closed, and the gas outlet valve 102 of the main tank 1 is opened. A portion of the fermentation gas in the containment space flows back to the containment space through the first path, and another portion of the fermentation gas flows back to the containment space through the second path. When the fermentation gas passes through the gas detection modules 6 on the first and second paths, it is detected by the gas detection modules. Block 6 detects and executes step S5. The first path is that the gas is discharged from the outlet valve 102 and sequentially enters the first pipeline 7, the first three-way valve 4, the fourth pipeline 10, the second three-way valve 5, the fifth pipeline 11 and the gas detection module 6. The second path is that after being discharged from the outlet valve 102, the gas is sequentially entered into the first pipeline 7, the first three-way valve 4, the second pipeline 8, the gas sampling valve 301, the gas storage module 3, the vent valve 302, the third pipeline 9, the second three-way valve 5, the fifth pipeline 11 and the gas detection module 6.

[0068] It should be noted that when anaerobic fermentation is performed with the pressure inside the main tank 1 being the same as the external atmospheric pressure, the gas storage module 3 is connected to the main tank 1, and the piston assembly 2 is slid to its bottom to contact the material and then fixed. A portion of the fermentation gas flows along the first path, and the other portion flows along the second path. After the gas detection module 6 detects the gas type and its corresponding concentration data, the analysis of the detection data from the gas detection module 6 reveals the changes in gas type and corresponding concentration under aerobic or anaerobic fermentation conditions, thereby determining the degree of fermentation maturity of the material.

[0069] The gas storage module 3 on the second path is equipped with a variable-volume elastic gas cavity that can absorb pressure fluctuations, so that the pressure inside the main tank 1 is the same as the external atmospheric pressure, maintaining dynamic balance.

[0070] This application enables gas detection of fermentation gases from materials under three conditions.

[0071] The working process of this invention is as follows: the organic fermentation material is placed in the containment space. When the gas of the material is detected to be anaerobic during fermentation, the gas intake valve 301 and the gas exhaust valve 302 of the gas storage module 3 are closed, the gas inlet valve 101 of the main tank 1 is opened, the piston assembly 2 is slid to its bottom to contact the material, the gas inlet valve 101 is closed, and the gas outlet valve 102 of the main tank 1 is opened. After that, the fermentation environment of the material is basically free of oxygen.

[0072] The material inside the main tank 1 undergoes anaerobic fermentation, generating gases such as NH3, CH4, and H2S. The expansion of the fermentation gases pushes the piston assembly 2 to slide along the first direction X, increasing the volume of the containment space and creating a positive pressure environment. The fermentation gases are discharged from the outlet valve 102 and sequentially enter the first pipe 7, the first three-way valve 4, the fourth pipe 10, the second three-way valve 5, the fifth pipe 11, and the gas detection module 6 along the first path, before flowing back into the containment space. The return of the fermentation gases to the containment space of the main tank 1 continues to push the piston assembly 2 to slide along the first direction X, which accelerates gas flow and prevents local accumulation. When anaerobic fermentation is required, the pressure inside the main tank 1 must be the same as the external atmospheric pressure. Open the gas sampling valve 301 and the gas venting valve 302 of the gas storage module 3, open the gas inlet valve 101 of the main tank 1, slide the piston assembly 2 to its bottom to contact the material and then fix the piston assembly 2, close the gas inlet valve 101, open the gas outlet valve 102 of the main tank 1. After a portion of the fermentation gas is discharged from the gas outlet valve 102, it enters the first pipeline 7, the first three-way valve 4, the fourth pipeline 10, the second three-way valve 5, the fifth pipeline 11 and the gas detection module 6 in sequence, and then flows back to the accommodating space. After another portion of the fermentation gas is discharged from the gas outlet valve 102, it enters the first pipeline 7, the first three-way valve 4, the second pipeline 8, the gas sampling valve 301, the gas storage module 3, the gas venting valve 302, the third pipeline 9, the second three-way valve 5, the fifth pipeline 11 and the gas detection module 6 in sequence, and then flows back to the accommodating space. When detecting the gas during aerobic fermentation of the material, open the gas sampling valve 301 and the gas venting valve 302 of the gas storage module 3, open the gas inlet valve 101 of the main tank 1, slide the piston assembly 2 along the first direction X until there is a preset distance between its bottom and the material, then fix the piston assembly 2, close the gas inlet valve 101, and open the gas outlet valve 102.

[0073] The material in the main tank 1 undergoes aerobic fermentation, generating CO2, H2O, and energy. A portion of the fermentation gas is discharged from the outlet valve 102 and then sequentially enters the first pipeline 7, the first three-way valve 4, the fourth pipeline 10, the second three-way valve 5, the fifth pipeline 11, and the gas detection module 6 along the first path, before flowing back to the containment space. Another portion of the fermentation gas is discharged from the outlet valve 102 and then sequentially enters the first pipeline 7, the first three-way valve 4, the second pipeline 8, the gas sampling valve 301, the gas storage module 3, the venting valve 302, the third pipeline 9, the second three-way valve 5, the fifth pipeline 11, and the gas detection module 6 along the second path, before flowing back to the containment space.

[0074] The fermentation gas is detected by the gas detection module 6, which detects the types of gases and their corresponding concentrations. Users can quickly and continuously monitor the changes in the concentration of fermentation gases. By analyzing the detection data of the gas detection module 6, the types of gases and their corresponding concentration changes under aerobic or anaerobic fermentation conditions can be analyzed, thereby determining the degree of fermentation maturity of the material.

[0075] In summary, the embodiments of the present invention provide a gas detection device and method for organic fermentation materials, which can quickly and continuously monitor the concentration changes of fermentation gases in organic fermentation materials, and can determine the degree of fermentation maturity of materials under both aerobic and anaerobic fermentation conditions.

[0076] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make several improvements and substitutions without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A gas detection device for organic fermentation materials, characterized in that, include: The main tank is provided with an air inlet valve and an air outlet valve, and the air outlet valve is connected to a first pipe. A piston assembly, which can slide in the main body tank or be fixed in the main body tank along a first direction, and a receiving space for placing organic fermentation materials is formed between the bottom of the piston assembly and the main body tank. A gas storage module, wherein the gas storage module is provided with an elastic gas chamber, and the gas sampling valve port and the gas venting valve port of the gas storage module are both connected to the elastic gas chamber. The gas sampling valve port is connected to a second pipe, and the gas venting valve port is connected to a third pipe. The first three-way valve is connected to the first pipeline, and the two outlet valves of the first three-way valve are connected to the second pipeline and the fourth pipeline, respectively. The second adapter three-way valve has two inlet valves connected to the third and fourth pipelines respectively, and the outlet valve of the second adapter three-way valve is connected to the fifth pipeline. A gas detection module, the gas inlet of which is connected to the fifth pipe, and the gas outlet of which is connected to the accommodating space via a one-way valve.

2. The gas detection device for organic fermentation materials according to claim 1, characterized in that, The main body of the can has an opening at the top, and an extension extends outward from the top edge of the main body of the can; The gas detection device also includes a fixing frame, which includes a central part and multiple branch parts. The central part is coaxial with the main body tank, and the branch parts extend radially along the main body tank. One end of each branch part is connected to the central part. Multiple branch parts are symmetrically distributed around the central part. Each branch part is detachably mounted on the extension part, and a mounting hole penetrating along a first direction is provided on each branch part. The piston assembly includes a piston disc and multiple piston rods; The piston disc is located inside the main body tank, the edge of the piston disc is attached to the inner side wall of the main body tank, and the accommodating space is formed between the bottom of the piston disc and the main body tank; The piston rod extends along a first direction, and the plurality of piston rods pass through the plurality of mounting holes one by one. The piston rod can slide along the first direction in the mounting hole or be fixed in the mounting hole. The bottom end of the piston rod is connected to the piston disc.

3. The gas detection device for organic fermentation materials according to claim 2, characterized in that, A first insertion hole extending in a second direction is provided on the side wall of the branch, and the first insertion hole communicates with the mounting hole; A second insertion hole extending in a second direction is provided on the side wall of the piston rod; The gas detection device also includes a locking bolt, which is used to pass through the first insertion hole and the second insertion hole; The second direction is located on a plane perpendicular to the first direction.

4. The gas detection device for organic fermentation materials according to claim 2, characterized in that, The branch portion has a first fixing hole that extends through the first direction, and the extension portion has a second fixing hole that extends through the first direction; The gas detection device also includes a fixing bolt, which is used to pass through the first fixing hole and the second fixing hole.

5. The gas detection device for organic fermentation materials according to claim 2, characterized in that, A sealing ring is attached to the circumferential edge of the piston disc, and the sealing ring fits against the inner wall of the main tank.

6. The gas detection device for organic fermentation materials according to claim 1, characterized in that, Also includes: A diaphragm pump, the outlet of which is connected to the accommodating space via a one-way valve, and the inlet of which is connected to the outlet of the gas detection module.

7. The gas detection device for organic fermentation materials according to claim 6, characterized in that, The diaphragm pump is provided with multiple units; The gas detection device further includes: A multi-way valve is provided, which has an inlet valve and multiple outlet valves. The outlet of the gas detection module is connected to the inlet valve of the multi-way valve, and the multiple outlet valves of the multi-way valve are respectively connected to the suction ports of multiple diaphragm pumps.

8. The gas detection device for organic fermentation materials according to claim 1, characterized in that, The second pipeline includes a first branch pipeline and a second branch pipeline. The first branch pipeline is connected to the outlet valve of the first transfer three-way valve, and the second branch pipeline is connected to the gas sampling valve port. An air bubble pool is connected between the first branch pipeline and the second branch pipeline, and a check valve is provided in the air bubble pool. The third pipeline includes a third branch pipeline and a fourth branch pipeline. The third branch pipeline is connected to the vent valve port, and the fourth branch pipeline is connected to the inlet valve of the second transfer three-way valve. An air bubble pool is connected between the third branch pipeline and the fourth branch pipeline, and a check valve is provided in the air bubble pool.

9. A method for detecting gases from organic fermentation materials, implemented based on the gas detection device for organic fermentation materials according to any one of claims 1-8, characterized in that, Includes the following steps: S1: Place the organic fermentation material into the containment space of the main tank; S2: Determine whether the material is undergoing aerobic fermentation. If yes, proceed to step S4; otherwise, proceed to step S3. S3: The fermentation gas in the containment space flows back to the containment space through the first path, and the fermentation gas is detected by the gas detection module when it passes through the gas detection module on the first path, and step S5 is executed. S4: A portion of the fermentation gas in the containment space flows back to the containment space through the first path, and another portion of the fermentation gas flows back to the containment space through the second path. When the fermentation gas passes through the gas detection modules on the first and second paths, it is detected by the gas detection modules, and step S5 is executed. S5: Obtain the gas type and its corresponding concentration detection data from the gas detection module to complete the gas detection.

10. The gas detection method for organic fermentation materials according to claim 9, characterized in that, Step S2 specifically includes: S21: Determine whether the material is undergoing aerobic fermentation. If yes, proceed to step S4; otherwise, proceed to step S22. S22: Determine whether the pressure inside the main tank is required to be the same as the external atmospheric pressure. If yes, proceed to step S30; otherwise, proceed to step S3. Also includes: S30: A portion of the fermentation gas in the containment space flows back to the containment space through the first path, and another portion of the fermentation gas flows back to the containment space through the second path. When the fermentation gas passes through the gas detection modules on the first and second paths, it is detected by the gas detection modules, and step S5 is executed.

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