A gas detection device and method for organic fermentation materials

Abstract

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

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas detection, in particular to a gas detection device and method for organic fermentation materials. BACKGROUND

[0002] Organic solid waste refers to solid waste containing a certain amount of organic matter, mainly from agricultural production, food processing, urban life and other fields. The organic solid waste is usually subjected to composting and biological fermentation treatment. Different gases are produced during the fermentation treatment process due to environmental differences. By measuring the changes in gas volume and gas concentration during the fermentation treatment process, the composting degree of the material can be determined.

[0003] At present, in the existing gas detection device for organic fermentation materials, as shown in Chinese patent CN215179382U (publication date: December 14, 2021), a gas pump, an ultrasonic vibrator, a drying box, a weighing instrument, a processor and a controller are sequentially installed inside the box from left to right. A plurality of grooves are provided above the ultrasonic vibrator, and a reactor is placed in the grooves. During the operation process, the gas outlet of the gas pump is inserted into the reactor which is previously filled with a standard solution, so that the external fermentation gas can be pumped into the reactor through the gas outlet of the gas pump, and the product is formed by the vibration of the ultrasonic vibrator. After the product is washed and dried, the data of the fermentation gas is obtained by weighing, which leads to the inability to quickly and continuously monitor the concentration change of the fermentation gas. SUMMARY

[0004] The purpose of the present application is to provide a gas detection device and method for organic fermentation materials, which can quickly and continuously monitor the concentration change of the fermentation gas of the organic fermentation materials, and can determine the composting degree of the material under aerobic fermentation and anaerobic fermentation conditions.

[0005] In order to achieve the above purpose, the present application provides a gas detection device for organic fermentation materials, comprising:

[0006] A main tank is provided with an air inlet valve and an air outlet valve, and the air outlet valve is connected with a first pipeline;

[0007] A piston assembly is slidably arranged in the main tank or fixedly arranged in the main tank in a first direction, and a containing space for placing organic fermentation materials is formed between the bottom of the piston assembly and the main tank;

[0008] A gas storage module is provided with an elastic air cavity, and the gas inlet valve and the gas outlet valve of the gas storage module are both communicated with the elastic air cavity. The gas inlet valve is connected with a second pipeline, and the gas outlet valve is connected with a third pipeline;

[0009] A first adapter three-way valve, an inlet valve of the first adapter three-way valve is connected with the first pipeline, two outlet valves of the first adapter three-way valve are connected with the second pipeline and the fourth pipeline respectively;

[0010] A second adapter three-way valve, two inlet valves of the second adapter three-way valve are connected with the third pipeline and the fourth pipeline respectively, an outlet valve of the second adapter three-way valve is connected with the fifth pipeline;

[0011] A gas detection module, an air inlet of the gas detection module is connected with the fifth pipeline, an air outlet of the gas detection module is communicated with the accommodating space through a one-way valve.

[0012] Preferably, the main tank has a top opening, and a top edge of the main tank extends outwardly with an extension;

[0013] The gas detection device further comprises a fixing frame, the fixing frame comprises a center part and a plurality of branch parts, the center part is coaxial with the main tank, the branch parts extend along a radial direction of the main tank, one end of the branch parts is connected with the center part, the branch parts are symmetrically distributed about the center part, the branch parts are detachably installed on the extension, and an installation hole penetrating in a first direction is formed in the branch parts;

[0014] The piston assembly comprises a piston disc and a plurality of piston rods;

[0015] The piston disc is located in the main tank, an edge of the piston disc is attached to an inner side wall of the main tank, and a bottom of the piston disc and the main tank form the accommodating space;

[0016] The piston rods extend along the first direction, the piston rods pass through the installation holes one by one, the piston rods are slidable in the installation holes or fixed in the installation holes along the first direction, and bottom ends of the piston rods are connected with the piston disc.

[0017] Preferably, a first plug hole extending along a second direction is formed in a side wall of the branch part, and the first plug hole is communicated with the installation hole;

[0018] A second plug hole extending along the second direction is formed in a side wall of the piston rod;

[0019] The gas detection device further comprises a locking bolt, and the locking bolt is used for penetrating through the first plug hole and the second plug hole;

[0020] The second direction is located on a plane perpendicular to the first direction.

[0021] Preferably, the branch part is provided with a first fixing hole penetrating in the first direction, and the extension part is provided with a second fixing hole penetrating in the first direction.

[0022] The gas detection device further comprises a fixing bolt for penetrating through the first fixing hole and the second fixing hole.

[0023] Preferably, the piston disc is attached with a sealing ring along the circumferential edge, and the sealing ring is attached to the inner side wall of the main body tank.

[0024] Preferably, further comprising:

[0025] A diaphragm pump, an outlet of the diaphragm pump is communicated with the accommodating space through a one-way valve, and an inlet of the diaphragm pump is connected with the gas outlet of the gas detection module.

[0026] Preferably, the diaphragm pump is provided with a plurality of;

[0027] The gas detection device further comprises:

[0028] A multi-way valve, the multi-way valve is provided with one gas inlet valve and a plurality of gas outlet valves, the gas outlet of the gas detection module is connected with the gas inlet valve of the multi-way valve, and the plurality of gas outlet valves of the multi-way valve are respectively and one by one connected with the inlets of the plurality of diaphragm pumps.

[0029] Preferably, the second pipeline comprises a first branch pipeline and a second branch pipeline, the first branch pipeline is connected with the outlet valve of the first adapter three-way valve, the second branch pipeline is connected with the gas sampling valve, and a bubble pool is connected between the first branch pipeline and the second branch pipeline, and a check valve is arranged in the bubble pool.

[0030] The third pipeline comprises a third branch pipeline and a fourth branch pipeline, the third branch pipeline is connected with the gas discharge valve, the fourth branch pipeline is connected with the inlet valve of the second adapter three-way valve, a bubble pool is connected between the third branch pipeline and the fourth branch pipeline, and a check valve is arranged in the bubble pool.

[0031] The application provides a gas detection method for organic fermentation materials, which is implemented based on the above-mentioned gas detection device for organic fermentation materials, and comprises the following steps:

[0032] S1: placing the organic fermentation materials in the accommodating space of the main body tank;

[0033] S2: judging whether the materials are subjected to aerobic fermentation, if yes, executing step S4; if not, executing step S3.

[0034] S3: the fermentation gas in the accommodation space flows back to the accommodation space through the first path, and the fermentation gas is detected by the gas detection module when passing through the gas detection module on the first path, and step S5 is performed;

[0035] S4: part of the fermentation gas in the accommodation space flows back to the accommodation space through the first path, and another part of the fermentation gas flows back to the accommodation space through the second path, and the fermentation gas is detected by the gas detection module when passing through the gas detection module on the first path and the second path, and step S5 is performed;

[0036] S5: obtaining the gas type and the corresponding concentration detection data of the gas detection module, and completing the gas detection.

[0037] Preferably, step S2 specifically comprises:

[0038] S21: judging whether the material is subjected to aerobic fermentation, if yes, step S4 is performed; if no, step S22 is performed;

[0039] S22: judging whether the pressure in the main tank is required to be the same as the atmospheric pressure, if yes, step S30 is performed; if no, step S3 is performed;

[0040] Further comprising:

[0041] S30: part of the fermentation gas in the accommodation space flows back to the accommodation space through the first path, and another part of the fermentation gas flows back to the accommodation space through the second path, and the fermentation gas is detected by the gas detection module when passing through the gas detection module on the first path and the second path, and step S5 is performed.

[0042] Compared with the prior art, the gas detection device for organic fermentation material has the following beneficial effects:

[0043] The organic fermentation material is placed in the accommodation space, the bottom of the switching piston assembly contacts the material or is at a preset distance from the material, the switching piston assembly can slide in the main tank in the first direction or be fixed in the main tank, the opening and closing of the gas inlet valve and the gas outlet valve of the gas storage module are switched, the anaerobic fermentation or aerobic fermentation condition can be switched, and the fermentation gas of the organic fermentation material is detected. After the fermentation gas of the material is detected by the gas detection module through different paths, it flows back to the accommodation space in the main tank, the detection process is fast and can continuously monitor the concentration change of the fermentation gas, the detection data of the gas detection module can be analyzed to analyze the type and corresponding concentration change of the gas under the aerobic fermentation or anaerobic fermentation condition, and the composting degree of the material fermentation can be judged. BRIEF DESCRIPTION OF DRAWINGS

[0044] Figure 1is a structural schematic view of the gas detection device of the organic fermentation material according to the embodiment of the present application;

[0045] Figure 2 is a structural schematic view of the gas detection device of the organic fermentation material from another perspective according to the embodiment of the present application;

[0046] Figure 3 is a structural schematic view of the gas detection device of the organic fermentation material from another perspective according to the embodiment of the present application;

[0047] Figure 4 is a flow chart of the gas detection method of the organic fermentation material according to the embodiment of the present application;

[0048] Figure 5 is a flow chart of the gas detection method of the organic fermentation material according to another embodiment of the present application;

[0049] In the figure, 1 is a main body tank; 101 is an air inlet valve port; 102 is an air outlet valve port; 103 is an extension; 2 is a piston assembly; 201 is a piston disc; 202 is a piston rod; 3 is a gas storage module; 301 is a gas sampling valve port; 302 is a gas releasing valve port; 4 is a first adapter tee valve; 5 is a second adapter tee valve; 6 is a gas detection module; 7 is a first pipeline; 8 is a second pipeline; 9 is a third pipeline; 10 is a fourth pipeline; 11 is a fifth pipeline; 12 is a fixing frame; 121 is a center part; 122 is a branch part; 13 is a locking bolt; 14 is a fixing bolt; 15 is a sealing ring; 16 is a diaphragm pump; 17 is a multi-way valve; 18 is a pouring opening; 19 is a sealing cover; and 20 is a bubble pool. DETAILED DESCRIPTION

[0050] The specific embodiments of the present application will be further described in detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present application, but are not used to limit the scope of the present application.

[0051] In the description of the present application, it should be understood that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, can be fixed connection, or detachable connection, or integrally connected; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0052] In the description of the present application, it should be understood that the terms "first", "second", "third" in the present application are only for the purpose of description, and cannot be understood as indicating or implying relative importance. In addition, the orientations or positional relationships indicated by the terms "up", "down", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", "X-axis direction", "Y-axis direction", "Z-axis direction" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. Moreover, in addition to indicating orientation or positional relationship, the above-mentioned part of the terms can also be used to indicate other meanings, for example, the term "up" can also be used to indicate a certain dependent relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present application can be understood according to the specific circumstances.

[0053] As shown in FIG. 1, the gas detection device for organic fermentation material according to the embodiment of the present application comprises a main tank 1, a piston assembly 2, a gas storage module 3, a first adapter tee valve 4, a second adapter tee valve 5 and a gas detection module 6. Figures 1-3

[0054] The main tank 1 is provided with an air inlet valve port 101 and an air outlet valve port 102, and the air outlet valve port 102 is connected with a first pipeline 7.

[0055] The piston assembly 2 is slidable in the main tank 1 or fixed in the main tank 1 along a first direction X, and a containing space for placing the organic fermentation material is formed between the bottom of the piston assembly 2 and the main tank 1.

[0056] The gas storage module 3 is provided with an elastic air cavity, and a gas inlet valve port 301 and a gas outlet valve port 302 of the gas storage module 3 are both communicated with the elastic air cavity (not shown in the figure), the gas inlet valve port 301 is connected with a second pipeline 8, and the gas outlet valve port 302 is connected with a third pipeline 9.

[0057] The inlet valve of the first adapter tee valve 4 is connected with the first pipeline 7, and the two outlet valves of the first adapter tee valve 4 are respectively connected with the second pipeline 8 and a fourth pipeline 10.

[0058] The two inlet valves of the second adapter tee valve 5 are respectively connected with the third pipeline 9 and the fourth pipeline 10, and the outlet valve of the second adapter tee valve 5 is connected with a fifth pipeline 11.

[0059] The gas inlet of the gas detection module 6 is connected with the fifth pipeline 11, and the gas outlet of the gas detection module 6 is communicated with the containing space through a one-way valve.

[0060] ​It should be noted that the organic fermentation material is placed in the accommodation space, when the gas detection of anaerobic fermentation of the material, the gas inlet valve port 301 and the gas outlet valve port 302 of the gas storage module 3 are closed, the gas inlet valve port 101 of the main tank 1 is opened, the piston assembly 2 is slid to the bottom to contact the material, then the gas inlet valve port 101 is closed, the gas outlet valve port 102 of the main tank 1 is opened, and then the fermentation environment of the material is basically free of oxygen.

[0061] The material in the main tank 1 is anaerobically fermented to generate NH3, CH4 and H2S, etc. The expansion of the fermentation gas pushes the piston assembly 2 to slide in the first direction X, the volume of the accommodation space increases to form a positive pressure environment, the fermentation gas is discharged from the gas outlet valve port 102, sequentially enters the first pipeline 7, the first switching tee valve 4, the fourth pipeline 10, the second switching tee valve 5, the fifth pipeline 11 and the gas detection module 6 along the first path, and then flows back to the accommodation space. The fermentation gas flows back to the accommodation space of the main tank 1, continues to push the piston assembly 2 to slide in the first direction X, which can accelerate the gas flow and avoid local accumulation;

[0062] When the gas detection of aerobic fermentation of the material is performed, the gas inlet valve port 301 and the gas outlet valve port 302 of the gas storage module 3 are opened, the gas inlet valve port 101 of the main tank 1 is opened, the piston assembly 2 is slid in the first direction X to a distance between the bottom and the material, then the piston assembly 2 is fixed, the gas inlet valve port 101 is closed, and the gas outlet valve port 102 is opened.

[0063] The material in the main tank 1 is aerobically fermented to generate CO2, H2O and energy. After a part of the fermentation gas is discharged from the gas outlet valve port 102, it sequentially enters the first pipeline 7, the first switching tee valve 4, the fourth pipeline 10, the second switching tee valve 5, the fifth pipeline 11 and the gas detection module 6 along the first path, and then flows back to the accommodation space. Another part of the fermentation gas is discharged from the gas outlet valve port 102, sequentially enters the first pipeline 7, the first switching tee valve 4, the second pipeline 8, the gas inlet valve port 301, the gas storage module 3, the gas outlet valve port 302, the third pipeline 9, the second switching tee valve 5, the fifth pipeline 11 and the gas detection module 6 along the second path, and then flows back to the accommodation space.

[0064] The fermentation gas is detected by the gas detection module 6 to obtain the type and corresponding concentration data of the gas. The user can quickly and continuously monitor the concentration change of the fermentation gas, analyze the type and corresponding concentration change of the gas under aerobic fermentation or anaerobic fermentation conditions through the detection data of the gas detection module 6, and then judge the degree of maturity of the material fermentation.

[0065] The gas storage module 3 is provided with an elastic air chamber with variable volume, so that when the gas storage module 3 is connected to the main tank 1, the elastic air chamber can absorb pressure fluctuations and maintain the pressure balance of the entire device. When the positive pressure in the main tank 1 is greater than 0.2 kPa, excess gas can be automatically stored in the elastic air chamber to avoid the risk of overpressure.

[0066] The gas storage module 3 is preferably a gas storage bag, which is provided with an elastic air chamber and is simple in structure and easy to use. In addition, the gas storage module 3 is pre-charged with gas, which can supply gas when the material needs more gas for aerobic fermentation.

[0067] The gas outlet of the gas detection module 6 is connected to the containing space through a one-way valve, which can prevent the gas in the containing space from being discharged to the channel connected between the gas outlet of the gas detection module 6 and the containing space, and ensure that the fermentation gas generated by the material is discharged from the gas outlet valve 102.

[0068] When the bottom of the piston assembly 2 contacts the material (i.e., the lower surface of the piston assembly 2 is flush with the upper surface of the material), the material cannot contact oxygen for fermentation, thus creating an anaerobic environment.

[0069] When the gas inlet valve 101 of the main tank 1 is opened, the piston assembly 2 is slid in the first direction X to a distance of a predetermined value between the bottom of the piston assembly 2 and the material, and then the piston assembly 2 is fixed. Gas enters the containing space from the gas inlet valve 101, and the gas inlet valve 101 is closed. There is oxygen in the containing space, and the material can ferment in an aerobic environment.

[0070] Further, the gas detection module 6 includes a gas sensor, such as an electrochemical gas sensor, an infrared absorption sensor, a semiconductor gas sensor, etc., which can convert the gas composition into an electrical signal and display the type and concentration of the gas in real time, so as to determine the consumption of oxygen and the generation of carbon dioxide during aerobic fermentation of the material, or to determine the generation of methane and hydrogen sulfide during anaerobic fermentation of the material, and to prompt oxygen deficiency spoilage if the hydrogen sulfide exceeds the standard.

[0071] Further, the main tank 1 is made of transparent material, such as acrylic material, so that the operator can observe the position of the piston assembly 2 in the main tank 1 from the outside of the main tank 1.

[0072] The main tank 1 is subjected to a 1.5 times working pressure sealing test, and the pressure range is 0-0.3 MPa.

[0073] Further, the main tank 1 is provided with a plurality of gas inlet valves 101, as shown in Figure 1 The main tank 1 is provided with two gas inlet valves 101.

[0074] In the embodiment, further, the top opening of the main tank 1, the top edge of the main tank 1 extends outwardly an extension 103;

[0075] The gas detection device further comprises a fixing frame 12, the fixing frame 12 comprises a center part 121 and a plurality of branch parts 122, the center part 121 is coaxial with the main tank 1, the branch parts 122 extend along the radial direction of the main tank 1, one end of the branch parts 122 is connected to the center part 121, the plurality of branch parts 122 are symmetrically distributed about the center part 121, the branch parts 122 are detachably installed on the extension 103, and the branch parts 122 are provided with installation holes (not shown in the figure) penetrating through in the first direction X;

[0076] The piston assembly 2 comprises a piston disc 201 and a plurality of piston rods 202;

[0077] The piston disc 201 is located in the main tank 1, the edge of the piston disc 201 abuts against the inner side wall of the main tank 1, and a containing space is formed between the bottom of the piston disc 201 and the main tank 1;

[0078] The piston rods 202 extend along the first direction X, the plurality of piston rods 202 respectively and one by one correspond to the plurality of installation holes, the piston rods 202 can slide in the installation holes or be fixed in the installation holes along the first direction X, and the bottom ends of the piston rods 202 are connected to the piston disc 201.

[0079] It should be noted that the fixing frame 12 comprises the center part 121 coaxial with the main tank 1, the plurality of branch parts 122 extending along the radial direction of the main tank 1 are symmetrically distributed about the center part 121 and one end of the branch parts 122 is connected to the center part 121, and the branch parts 122 are detachably installed on the extension 103 extending outwardly from the top edge of the main tank 1, so that the fixing frame 12 is detachably installed on the top of the main tank 1, and when the fixing frame 12 needs to be replaced, the fixing frame 12 can be detached from the main tank 1.

[0080] The plurality of piston rods 202 extending along the first direction X are passed through the installation holes penetrating through in the first direction X on the branch parts 122, so that the installation holes of the branch parts 122 can limit the sliding direction of the piston rods 202, and the piston rods 202 can slide in the installation holes along the first direction X.

[0081] The piston disc 201 is located in the main tank 1 and the edge thereof abuts against the inner side wall of the main tank 1, so that the piston disc 201 is coaxial with the main tank 1. Since the plurality of piston rods 202 correspond to the plurality of branch parts 122, the positions where the bottom ends of the plurality of piston rods 202 are connected to the piston disc 201 are symmetrically distributed about the center of the piston disc 201, so that when the plurality of piston rods 202 slide along the first direction X, the piston disc 201 can also stably slide along the first direction X, and the piston assembly 2 can stably slide in the main tank 1 along the first direction X.

[0082] Since the top of the main tank 1 is open, and the extension 103 extends outward from the top edge of the main tank 1 without affecting the opening of the top of the main tank 1, when the fixing frame 12 is detached from the main tank 1, the piston disc 201 and the piston rod 202 can also be detached from the main tank 1 in the first direction X for replacement.

[0083] When the piston rod 202 is fixed in the mounting hole, that is, the piston rod 202 is fixed on the fixing frame 12, so as to install the fixing frame 12 on the extension 103 of the main tank 1, the piston rod 202 can be fixed relative to the main tank 1, so that the piston disc 201 is also fixed relative to the main tank 1, and the piston assembly 2 is fixed in the main tank 1.

[0084] The bottom of the piston assembly 2, that is, the bottom of the piston disc 201, when the bottom of the piston disc 201 contacts the material (that is, the lower surface of the piston disc 201 is flush with the upper surface of the material), the material cannot contact oxygen for fermentation, so an anaerobic environment is created.

[0085] In this embodiment, further, a first plug hole (not shown in the figure) extending in the second direction is formed in the side wall of the branch portion 122, and the first plug hole communicates with the mounting hole (not shown in the figure);

[0086] A second plug hole (not shown in the figure) extending in the second direction is formed in the side wall of the piston rod 202;

[0087] The gas detection device further comprises a locking bolt 13, which is used to pass through the first plug hole and the second plug hole;

[0088] Among them, the second direction is located in the plane perpendicular to the first direction X.

[0089] It should be noted that the locking bolt 13 passes through the first plug hole in the side wall of the branch portion 122 into the mounting hole in the second direction, and at this time the piston rod 202 passes through the mounting hole, and when the second plug hole in the side wall of the piston rod 202 corresponds to the first plug hole, the locking bolt 13 can pass through the second plug hole to fix the piston rod 202 and the fixing frame 12, and the piston rod 202 cannot slide in the first direction X in the mounting hole. When the locking bolt 13 is removed, the piston rod 202 can slide in the first direction X in the mounting hole, realizing the detachable installation of the piston rod 202 and the fixing frame 12.

[0090] Further, the second direction, the first direction X and the radial direction of the main tank 1 are perpendicular to each other, so that the locking bolt 13 can be more smoothly inserted into the first plug hole and the second plug hole.

[0091] Further, the side wall of the piston rod 202 is provided with two second insertion holes extending in the second direction, and the two second insertion holes are sequentially arranged in the first direction. When the bottom of the piston disc 201 contacts the material and the piston disc 201 needs to be fixed, the locking bolt 13 is inserted through the first insertion hole and one of the second insertion holes; when the bottom of the piston disc 201 is away from the material by a preset distance and the piston disc 201 needs to be fixed, the locking bolt 13 is inserted through the first insertion hole and the other second insertion hole.

[0092] In the embodiment, further, the branch part 122 is provided with a first fixing hole (not shown in the figure) extending through in the first direction X, and the extension part 103 is provided with a second fixing hole (not shown in the figure) extending through in the first direction X.

[0093] The gas detection device further comprises a fixing bolt 14, which is used to pass through the first fixing hole and the second fixing hole.

[0094] It should be noted that the branch part 122 is provided with a first fixing hole extending through in the first direction X, and the extension part 103 is provided with a second fixing hole extending through in the first direction X, so that the first fixing hole and the second fixing hole correspond in the first direction X, and the fixing bolt 14 passes through the first fixing hole and the second fixing hole to assemble the branch part 122 of the fixing frame 12 and the extension part 103 of the main body tank 1. When the fixing bolt 14 is removed, the branch part 122 of the fixing frame 12 can be separated from the extension part 103 of the main body tank 1, so that the branch part 122 can be detachably mounted on the extension part 103.

[0095] Further, the device further comprises a top cover (not shown in the figure), which is provided with a third fixing hole extending through in the first direction X, and is used to close the top opening of the main body tank 1. After the fixing frame 12, the piston rod 202 and the piston disc 201 are separated from the main body tank 1, the top cover can be placed on the top of the main body tank 1, so that the third fixing hole is aligned with the first fixing hole of the extension part 103 for bolt fixing, and the main body tank 1 is vacuum sealed.

[0096] In the embodiment, further, the piston disc 201 is attached with a sealing ring 15 along the circumferential edge, and the sealing ring 15 is attached to the inner side wall of the main body tank 1.

[0097] It should be noted that the piston disc 201 is attached with a sealing ring 15 along the circumferential edge, and the sealing ring 15 is attached to the inner side wall of the main body tank 1, so that 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 side wall of the main body tank 1, which improves the sealing performance of the device and effectively ensures the smooth progress of the gas detection.

[0098] In the embodiment, further comprising: a diaphragm pump 16, an outlet of the diaphragm pump 16 is communicated with the containing space through a one-way valve, and an inlet of the diaphragm pump 16 is connected to the gas outlet of the gas detection module 6.

[0099] It should be noted that the outlet of the diaphragm pump 16 is communicated with the containing space through a one-way valve, and the inlet of the diaphragm pump 16 is connected to the gas 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. However, the fluid channel of the diaphragm pump 16 adopts a smooth pump cavity and a diaphragm structure, which can reduce the risk of impurities remaining in the pump body, thereby effectively avoiding the blockage of the channel by impurities and facilitating the smooth return of the fermentation gas to the containing space.

[0100] The diaphragm pump 16 is arranged outside the main tank 1 to meet the explosion-proof requirement and allow the processing of flammable and explosive gases such as methane. Since the fermentation of the material produces fermentation gas, a positive pressure is generated in the main tank 1. The pressure difference can drive the piston of the diaphragm pump 16 to move and actively suck the gas. The reciprocating motion of the diaphragm pump 16 forms a directional gas flow, which can accelerate the gas flow along the corresponding path. The diaphragm pump 16 adopts an Ex ia level explosion-proof design.

[0101] In the embodiment, further, the diaphragm pump 16 is provided with a plurality of;

[0102] The gas detection device further comprises a multi-way valve 17, which is provided with one gas inlet valve and a plurality of gas outlet valves. The gas outlet of the gas detection module 6 is connected to the gas inlet valve of the multi-way valve 17, and the plurality of gas outlet valves of the multi-way valve 17 are respectively and correspondingly connected to the inlets of the plurality of diaphragm pumps 16.

[0103] It should be noted that in order to prevent the fermentation gas from not being able to smoothly return to the containing space when one diaphragm pump 16 stops running, a plurality of diaphragm pumps 16 are arranged in parallel, and a plurality of different gas outlet valves of the multi-way valve 17 are respectively and correspondingly connected to the inlets of the plurality of 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 aeration and facilitating the smooth return of the fermentation gas.

[0104] In the embodiment, further, the second pipeline 8 comprises 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 adapter tee valve 4, and the second branch pipeline is connected to the gas valve port 301. The first branch pipeline and the second branch pipeline are connected with a bubble pool 20, and the bubble pool 20 is provided with a check valve.

[0105] 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.

[0106] 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.

[0107] 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.

[0108] The bubble tank 20 is equipped with a check valve to ensure that the fermentation gas flows unidirectionally along the prescribed second path.

[0109] Furthermore, a bracket is installed on the outer wall of the main tank 1, and the bubble pool 20 is installed on the bracket.

[0110] 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.

[0111] 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.

[0112] like Figures 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:

[0113] S1: Place the organic fermentation material in the containment space of the main tank 1;

[0114] S2: Determine whether the material is undergoing aerobic fermentation. If yes, proceed to step S4; otherwise, proceed to step S3.

[0115] 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.

[0116] Specifically: close the gas extraction valve port 301 and the gas release valve port 302 of the gas storage module 3, open the gas inlet valve port 101 of the main body tank 1, slide the piston assembly 2 to the bottom of the container space, close the gas inlet valve port 101, open the gas outlet valve port 102 of the main body tank 1, and the fermentation gas in the container space flows back to the container space through the first path, and the fermentation gas is detected by the gas detection module 6 when passing through the gas detection module 6 on the first path, and step S5 is performed.

[0117] S4: A part of the fermentation gas in the container space flows back to the container space through the first path, and another part of the fermentation gas flows back to the container space through the second path. The fermentation gas is detected by the gas detection module 6 when passing through the gas detection module 6 on the first path and the second path, and step S5 is performed.

[0118] Specifically: open the gas extraction valve port 301 and the gas release valve port 302 of the gas storage module 3, open the gas inlet valve port 101 of the main body tank 1, slide the piston assembly 2 to the bottom of the container space, close the gas inlet valve port 101, open the gas outlet valve port 102 of the main body tank 1, and the fermentation gas in the container space flows back to the container space through the first path, and another part of the fermentation gas flows back to the container space through the second path. The fermentation gas is detected by the gas detection module 6 when passing through the gas detection module 6 on the first path and the second path, and step S5 is performed.

[0119] S5: Obtain the gas type and its corresponding concentration detection data of the gas detection module, and complete the gas detection.

[0120] It should be noted that the organic fermentation material is placed in the container space, and the bottom of the piston assembly 2 contacts the material or is separated from the material by a preset distance greater than 0 by switching the piston assembly 2, and the piston assembly 2 can be slid in the first direction X in the main body tank 1 or fixed in the state of the main body tank 1, and the opening and closing of the gas extraction valve port 301 and the gas release valve port 302 of the gas storage module 3 can switch the conditions of anaerobic fermentation or aerobic fermentation, and the fermentation gas of the organic fermentation material is detected.

[0121] The fermentation gas of the material is detected by the gas detection module 6 through different paths and then flows back to the containing space of the main tank 1. The detection process is fast and can continuously monitor the concentration change of the fermentation gas. By analyzing the detection data of the gas detection module 6, the types of gas under aerobic fermentation or anaerobic fermentation conditions can be analyzed according to the corresponding concentration change, and then the composting degree of the material fermentation can be judged.

[0122] In step S2, it is judged whether the material is subjected to aerobic fermentation. If yes, the condition of aerobic fermentation is manufactured to execute step S4. If no, the condition of anaerobic fermentation is manufactured to execute step S3.

[0123] In step S3, when the fermentation gas expands, the internal volume of the containing space of the main tank 1 increases to form a positive pressure environment, so that the fermentation gas is discharged from the gas outlet valve 102.

[0124] As shown in Figures 1-5 The gas detection method for the organic fermented material of the embodiment 3 of the present application is different from the gas detection method for the organic fermented material of the embodiment 2 in that the step S2 is different:

[0125] The step S2 specifically includes:

[0126] S21: It is judged whether the material is subjected to aerobic fermentation. If yes, step S4 is executed. If no, step S22 is executed.

[0127] S22: It is judged whether the pressure in the main tank 1 is required to be the same as the atmospheric pressure. If yes, step S30 is executed. If no, step S3 is executed.

[0128] Further including:

[0129] S30: A part of the fermentation gas in the containing space flows back to the containing space through the first path, and another part of the fermentation gas flows back to the containing space through the second path. The fermentation gas is detected by the gas detection module 6 when passing through the gas detection module 6 on the first path and the second path, and step S5 is executed.

[0130] Specifically, the gas inlet valve port 301 and the gas outlet valve port 302 of the gas storage module 3 are opened, the gas inlet valve port 101 of the main tank 1 is opened, the piston assembly 2 is slid to the bottom to contact the material and then fixed, the gas inlet valve port 101 is closed, the gas outlet valve port 102 of the main tank 1 is opened, a part of the fermentation gas in the containing space flows back to the containing space through the first path, another part of the fermentation gas flows back to the containing space through the second path, the fermentation gas is detected by the gas detection module 6 when passing through the gas detection module 6 on the first path and the second path, and step S5 is performed, wherein the first path is that the gas outlet valve port 102 is discharged, sequentially enters the first pipeline 7, the first switching tee valve 4, the fourth pipeline 10, the second switching tee valve 5, the fifth pipeline 11 and the gas detection module 6, and the second path is that the gas outlet valve port 102 is discharged, sequentially enters the first pipeline 7, the first switching tee valve 4, the second pipeline 8, the gas inlet valve port 301, the gas storage module 3, the gas outlet valve port 302, the third pipeline 9, the second switching tee valve 5, the fifth pipeline 11 and the gas detection module 6.

[0131] It should be noted that when the pressure in the main tank 1 is required to be the same as the atmospheric pressure for anaerobic fermentation, the gas storage module 3 is connected to the main tank 1, and the piston assembly 2 is slid to the bottom to contact the material and then fixed, a part of the fermentation gas flows along the first path, and another part of the fermentation gas flows along the second path. After the fermentation gas is detected by the gas detection module 6 for the type of gas and the corresponding concentration data, the type of gas and the corresponding concentration change under the condition of aerobic fermentation or anaerobic fermentation are analyzed by analyzing the detection data of the gas detection module 6, and then the degree of maturity of the material fermentation can be judged.

[0132] The gas storage module 3 on the second path is provided with an elastic gas cavity with variable volume, which can absorb pressure fluctuation, so that the pressure in the main tank 1 is the same as the atmospheric pressure, and dynamic balance is maintained.

[0133] The application can detect the fermentation gas of the material under three conditions.

[0134] The working process of the application is as follows: the organic fermentation material is placed in the containing space, when the gas detection of anaerobic fermentation of the material is performed, the gas inlet valve port 301 and the gas outlet valve port 302 of the gas storage module 3 are closed, the gas inlet valve port 101 of the main tank 1 is opened, the piston assembly 2 is slid to the bottom to contact the material, then the gas inlet valve port 101 is closed, and the gas outlet valve port 102 of the main tank 1 is opened, and then the environment for fermentation of the material is basically free of oxygen.

[0135] The material in the main tank 1 is anaerobically fermented to generate NH3, CH4 and H2S, etc. The fermentation gas expands to push the piston assembly 2 to slide in the first direction X, the volume of the containing space increases to form a positive pressure environment, the fermentation gas is discharged from the gas outlet valve port 102, sequentially enters the first pipeline 7, the first switching tee valve 4, the fourth pipeline 10, the second switching tee valve 5, the fifth pipeline 11 and the gas detection module 6 along the first path, and then flows back to the containing space. The fermentation gas flows back to the containing space of the main tank 1 to continue to push the piston assembly 2 to slide in the first direction X, which can accelerate the gas flow to avoid local accumulation;

[0136] When the pressure in the main tank 1 is required to be the same as the atmospheric pressure for anaerobic fermentation, the gas inlet valve port 301 and the gas outlet valve port 302 of the gas storage module 3 are opened, the gas inlet valve port 101 of the main tank 1 is opened, the piston assembly 2 is fixed after sliding to the bottom to contact the material, the gas inlet valve port 101 is closed, and the gas outlet valve port 102 of the main tank 1 is opened. After a part of the fermentation gas is discharged from the gas outlet valve port 102, it sequentially enters the first pipeline 7, the first switching tee valve 4, the fourth pipeline 10, the second switching tee valve 5, the fifth pipeline 11 and the gas detection module 6, and then flows back to the containing space. Another part of the fermentation gas is discharged from the gas outlet valve port 102, sequentially enters the first pipeline 7, the first switching tee valve 4, the second pipeline 8, the gas inlet valve port 301, the gas storage module 3, the gas outlet valve port 302, the third pipeline 9, the second switching tee valve 5, the fifth pipeline 11 and the gas detection module 6, and then flows back to the containing space.

[0137] When the gas detection of the aerobic fermentation of the material is required, the gas inlet valve port 301 and the gas outlet valve port 302 of the gas storage module 3 are opened, the gas inlet valve port 101 of the main tank 1 is opened, the piston assembly 2 is fixed after sliding in the first direction X to a distance between the bottom and the material, the gas inlet valve port 101 is closed, and the gas outlet valve port 102 is opened.

[0138] The material in the main tank 1 is anaerobically fermented to generate NH3, CH4 and H2S, etc. The fermentation gas expands to push the piston assembly 2 to slide in the first direction X, the volume of the containing space increases to form a positive pressure environment, the fermentation gas is discharged from the gas outlet valve port 102, sequentially enters the first pipeline 7, the first switching tee valve 4, the fourth pipeline 10, the second switching tee valve 5, the fifth pipeline 11 and the gas detection module 6 along the first path, and then flows back to the containing space. The fermentation gas flows back to the containing space of the main tank 1 to continue to push the piston assembly 2 to slide in the first direction X, which can accelerate the gas flow to avoid local accumulation;

[0139] The fermentation gas is detected by the gas detection module 6 to detect the gas type and the corresponding concentration data, so that the user can quickly and continuously monitor the concentration change of the fermentation gas, and through analysis of the detection data of the gas detection module 6, the type and the corresponding concentration change of the gas under aerobic fermentation or anaerobic fermentation conditions can be analyzed, and then the composting degree of the material fermentation can be judged.

[0140] To sum up, the embodiment of the present application provides a kind of gas detection device and method of organic fermentation material, the concentration change of the fermentation gas of organic fermentation material can be quickly and continuously monitored, and the composting degree of material fermentation can be judged under the condition of aerobic fermentation and anaerobic fermentation.

[0141] The above is only the preferred embodiment of the present application, it should be pointed out, for ordinary skilled person in the art, without departing from the technical principles of the present application, can also make a number of improvements and substitutions, these improvements and substitutions should also be considered as the protection scope of the present application.

Claims

1. A gas detection device for organic fermentation material, characterized by, 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 apparatus for detecting a gas of an organic fermentation material according to claim 1, wherein 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 apparatus for detecting a gas of an organic fermentation material according to claim 2, wherein 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 apparatus for detecting a gas of an organic fermentation material according to claim 2, wherein 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 apparatus for detecting a gas of an organic fermentation material according to claim 2, wherein 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 apparatus for detecting a gas of an organic fermentation material according to claim 1, wherein 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 apparatus for detecting a gas of an organic fermentation material according to claim 6, wherein The diaphragm pump is provided with a plurality of; The gas detection device further comprises: A multi-way valve is provided with an inlet valve and a plurality of outlet valves, the outlet of the gas detection module is connected to the inlet valve of the multi-way valve, and the plurality of outlet valves of the multi-way valve are respectively and one by one connected to the suction inlets of the plurality of diaphragm pumps.

8. The apparatus for detecting a gas of an organic fermentation material according to claim 1, wherein The second pipeline comprises a first branch pipeline and a second branch pipeline, the first branch pipeline is connected to the outlet valve of the first adapter three-way valve, the second branch pipeline is connected to the gas extraction valve port, and a bubble pool is connected between the first branch pipeline and the second branch pipeline, and a check valve is arranged in the bubble pool. The third pipeline comprises a third branch pipeline and a fourth branch pipeline, the third branch pipeline is connected to the gas discharge valve port, the fourth branch pipeline is connected to the inlet valve of the second adapter three-way valve, and a bubble pool is connected between the third branch pipeline and the fourth branch pipeline, and a check valve is arranged in the bubble pool.

9. A method for detecting a gas of an organic fermentation material, which is implemented based on the gas detection device for the organic fermentation material according to any one of claims 1 to 8, characterized in that, The method comprises the following steps: S1: placing the organic fermentation material in the accommodation space of the main tank; S2: judging whether the material is subjected to aerobic fermentation, if yes, executing step S4; if no, executing step S3; S3: the fermentation gas in the accommodation space flows back to the accommodation space through the first path, and the fermentation gas is detected by the gas detection module when passing through the gas detection module on the first path, and step S5 is executed; S4: part of the fermentation gas in the accommodation space flows back to the accommodation space through the first path, and another part of the fermentation gas flows back to the accommodation space through the second path, the fermentation gas is detected by the gas detection module when passing through the gas detection module on the first path and the second path, and step S5 is executed; S5: acquiring the gas type of the gas detection module and the corresponding concentration detection data, and completing gas detection.

10. A method for detecting a gas of an organic fermentation material, which is implemented based on the gas detection device for the organic fermentation material according to any one of claims 1 to 8, characterized in that, The method comprises the following steps: S1: placing the organic fermentation material in the accommodation space of the main tank; S21: judging whether the material is subjected to aerobic fermentation, if yes, executing step S4; if no, executing step S22; S22: judging whether the pressure in the main tank is required to be the same as the atmospheric pressure, if yes, executing step S30; if no, executing step S3; S30: part of the fermentation gas in the accommodation space flows back to the accommodation space through the first path, and another part of the fermentation gas flows back to the accommodation space through the second path, the fermentation gas is detected by the gas detection module when passing through the gas detection module on the first path and the second path, and step S5 is executed; S3: the fermentation gas in the accommodation space flows back to the accommodation space through the first path, and the fermentation gas is detected by the gas detection module when passing through the gas detection module on the first path, and step S5 is executed; S4: part of the fermentation gas in the accommodation space flows back to the accommodation space through the first path, and another part of the fermentation gas flows back to the accommodation space through the second path, the fermentation gas is detected by the gas detection module when passing through the gas detection module on the first path and the second path, and step S5 is executed; S5: acquiring the gas type of the gas detection module and the corresponding concentration detection data, and completing gas detection.

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