Laboratory compost fermentation gas collecting device and system

Abstract

A collection device and system for compost fermentation gas in a laboratory relates to the technical field of fermentation gas collection, and comprises a gas collection tank communicated with a fermentation tank through a gas pipeline, and a vacuum generator is arranged on the gas pipeline. A separation tank which is mounted above the fermentation tank and is provided with a separation cavity in the center is arranged at one end, far away from the gas collection tank, of the gas pipeline, the bottom end of the separation cavity is communicated with the fermentation tank, and the top end of the separation cavity is communicated with the gas pipeline; a plurality of baffles which are distributed in a staggered mode in the height direction of the separation tank are arranged on the inner side wall of the separation tank, the surfaces of the baffles are coated with hydrophilic strips, one end of each baffle is connected with the side wall of the separation tank, and a ventilation gap for gas to pass through is formed between the other end of each baffle and the other side wall of the separation tank. The device disclosed by the utility model can purify fermentation gas and is convenient for research on the fermentation gas.

Description

Technical Field

[0001] This utility model relates to the field of fermentation gas collection technology, specifically a collection device and system for laboratory compost fermentation gases. Background Technology

[0002] Agricultural waste and household kitchen waste, if not effectively treated, will cause serious environmental pollution. Therefore, bio-composting is one of the effective ways to achieve resource utilization and harmless treatment of these materials. However, the bio-composting process produces a large amount of complex gases, such as hydrogen sulfide, ammonia, carbon dioxide, and methane, due to the action of microorganisms. The release of these gases not only pollutes the air and contributes to the greenhouse effect, but also causes the loss of nutrients in the compost. Therefore, in order to monitor the fermentation process in real time, comprehensively monitor the gas production and changes during fermentation, scientifically analyze their composition, and find suitable treatment methods, it is necessary to collect and study the gases produced during fermentation.

[0003] Currently, most methods directly connect the gas collection tank to the fermentation tank via a gas supply pipe. One end of the pipe extends into the gas collection tank, and the other end connects to the fermentation tank, allowing fermentation gases from the fermentation tank to enter the gas collection tank directly through the pipe. However, during composting, the fermentation gases typically contain a large amount of moisture and some raw materials, leading to inaccurate analysis. Furthermore, gas collection is a continuous process; the fermentation gases remain in the collection device for a period, causing secondary fermentation within the device and resulting in differences in gas composition between the gas in the gas collection tank and the gas in the fermentation tank. Utility Model Content

[0004] The purpose of this invention is to provide a collection device and system for laboratory composting fermentation gases, which can purify the fermentation gases and facilitate research on them.

[0005] To achieve the above objectives, the specific solution adopted by this utility model is as follows: a gas collection device for laboratory composting fermentation includes a gas collection tank connected to a fermentation tank via a gas supply pipe, a vacuum generator installed on the gas supply pipe, and a separation tank installed above the fermentation tank with a separation chamber at its center at the end of the gas supply pipe away from the gas collection tank. The bottom end of the separation chamber is connected to the fermentation tank, and the top end of the separation chamber is connected to the gas supply pipe. Multiple baffles with hydrophilic strips coated on their surfaces are arranged alternately along their height on the inner side wall of the separation tank. One end of the baffle is connected to the side wall of the separation tank, and the other end of the baffle has a ventilation gap between it and the other side wall of the separation tank for gas to pass through. Gas carrying moisture and raw materials in the fermentation tank enters the separation chamber from the bottom end of the separation tank and collides with the baffle. The moisture and raw materials in the gas adhere to the baffle and converge on the hydrophilic strip, eventually flowing back into the fermentation tank. The separated gas flows out from the top of the separation chamber and finally enters the gas collection tank through the gas supply pipe.

[0006] As an optimized solution for the above-mentioned laboratory composting fermentation gas collection device: the separator is fitted with a clean gas tank with both ends closed, and an outlet channel is formed between the inner side wall of the clean gas tank and the outer side wall of the separator. The top of the separator chamber is connected to the outlet channel, and the bottom of the clean gas tank is provided with an outlet hole for connecting the outlet channel and the gas transmission pipeline.

[0007] As another optimized solution for the above-mentioned laboratory composting fermentation gas collection device: the gas outlet channel is filled with an adsorbent for absorbing residual moisture in the gas.

[0008] As another optimized solution for the above-mentioned laboratory composting fermentation gas collection device: the separation tank has openings at both ends, and there is a communication gap between the top of the separation tank and the top wall of the clean gas tank for connecting the separation chamber and the gas outlet channel.

[0009] As another optimized solution for the above-mentioned laboratory composting fermentation gas collection device: the separation tank has a structure with an open bottom and a closed top, and the top of the separation tank has several connecting holes for connecting the separation chamber and the gas outlet channel.

[0010] As another optimized solution for the above-mentioned laboratory composting fermentation gas collection device: the baffle is inclined and its top end is connected to the inner wall of the separation tank, and its bottom end extends toward the separation chamber.

[0011] As another optimized solution for the above-mentioned laboratory composting fermentation gas collection device: the hydrophilic strip is a rectangular strip structure that extends along the inclined direction of the baffle, and there are multiple hydrophilic strips that are evenly distributed along the inclined direction perpendicular to the baffle.

[0012] As another optimized solution for the above-mentioned laboratory composting fermentation gas collection device: the hydrophilic strip includes a first part located at the center of the baffle and extending along the inclined direction of the baffle, and multiple second parts are inclinedly arranged on both sides of the first part, with the bottom end of the second part connected to the first part.

[0013] As another optimized solution for the above-mentioned laboratory composting fermentation gas collection device: the bottom end of the baffle is provided with several guide rods, the top end of the guide rods is connected to the baffle, and the bottom end of the guide rods overlaps the hydrophilic strip position of the baffle below.

[0014] A system for collecting laboratory compost fermentation gases includes a fermentation tank, the top of which is connected to a gas collection device, the gas collection device being the aforementioned laboratory compost fermentation gas collection device.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. This utility model provides a collection device for laboratory composting fermentation gas. The gas in the fermentation tank enters the separation chamber from the bottom of the separation tank. During the flow through the separation chamber, it collides with the baffle. The moisture and raw materials in the gas adhere to the baffle during the collision. The moisture adhering to the baffle, along with the raw materials, gathers on the hydrophilic strip of the baffle and finally flows back into the fermentation tank under the action of gravity. The separated gas flows out from the top of the separation chamber and finally enters the gas collection tank through the gas delivery pipe to purify the fermentation gas, which is convenient for subsequent research on the fermentation gas.

[0017] 2. In this invention, during the collision between the gas and the baffle, a very small portion of the water will break into smaller droplets, and the gas will carry this portion of water out of the separation chamber. Therefore, the adsorbent further purifies the fermentation gas and improves the separation effect.

[0018] 3. In this utility model, the guide rod facilitates the return of water and raw materials on the baffle to the fermentation tank. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a laboratory composting fermentation gas system;

[0020] Figure 2 This is a schematic diagram of the structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the structure of this utility model when the top of the separation tank is closed;

[0022] Figure 4 This is a schematic diagram of the separator tank when the guide rod is installed;

[0023] Figure 5This is a schematic diagram of the distribution of hydrophilic strips in Example 6;

[0024] Figure 6 This is a schematic diagram of the distribution of hydrophilic strips in Example 7;

[0025] Reference numerals: 1. Purified gas tank; 101. Gas outlet; 102. Adsorbent; 2. Fermentation tank; 3. Gas collection tank; 4. Vacuum generator; 5. Gas delivery pipeline; 6. Separation tank; 601. Connecting gap; 602. Connecting part; 603. Lock seat; 604. Separation chamber; 605. Connecting hole; 7. Baffle; 701. Hydrophilic strip; 702. First part; 703. Second part; 704. Ventilation gap; 705. Guide rod. Detailed Implementation

[0026] The technical solution of this utility model will be further described in detail below with reference to specific embodiments. Parts not described or disclosed in detail in the following embodiments of this utility model should be understood as prior art known or should be known by those skilled in the art, such as the structure of the fermenter 2, the mechanism of the gas collecting tank 3, how the adsorbent 102 adsorbs moisture and raw materials, the structure of the vacuum generator 4, and how the vacuum generator 4 generates negative pressure, etc.

[0027] Example 1

[0028] like Figure 1 As shown, a gas collection device for laboratory composting fermentation includes a gas collection tank 3 connected to a fermentation tank 2 via a gas supply pipe 5. A vacuum generator 4 is installed on the gas supply pipe 5. The gas collection tank 3 is located on one side of the fermentation tank 2. One end of the gas supply pipe 5 extends into the gas collection tank 3, and the other end of the gas supply pipe 5 is connected to the fermentation tank 2. When the vacuum generator 4 is working, it creates a negative pressure, drawing the gas in the fermentation tank 2 into the gas collection tank 3, which facilitates the collection of gas in the fermentation tank 2.

[0029] At the end of the gas supply pipeline 5 furthest from the gas collecting tank 3, there is a separation tank 6 installed above the fermenter 2, with a separation chamber 604 at its center. The separation tank 6 has a square cylindrical structure, meaning its cross-section is square. The bottom end of the separation chamber 604 is connected to the fermenter 2. Specifically, the bottom end of the separation chamber 604 is recessed towards its center to form a concave section. The bottom end of the concave section is connected to a connecting part 602 for connecting to the fermenter 2. The bottom end of the connecting part 602 extends into the fermenter 2. The connecting part 602 is threadedly connected to the top of the fermenter 2 via a locking seat 603. The top end of the separation chamber 604 is connected to the gas supply pipeline 5.

[0030] The inner wall of the separation tank 6 is provided with multiple baffles 7, which are staggered along its height and coated with hydrophilic strips 701. The number of baffles 7 is 2-6; in this embodiment, there are 4 baffles 7, which are rectangular plate-shaped structures. Figure 2 As shown, two baffles 7 are provided on the left side wall of the separator 6, and two baffles 7 are provided on the right side wall of the separator 6. A gap for gas passage exists between adjacent baffles 7 in the height direction. One end of each baffle 7 is connected to the side wall of the separator 6, and a ventilation gap 704 for gas passage exists between the other end of each baffle 7 and the other side wall of the separator 6. In this embodiment, [the following is used as an example]. Figure 2 Taking the bottommost baffle 7 as an example, the left edge of the baffle 7 is fixedly and sealed to the left side wall of the separator 6, and the front and rear edges of the separator 6 are respectively sealed to the front and rear side walls of the separator 6. An air gap 704 is formed between the right edge of the baffle 7 and the right side wall of the separator 6.

[0031] In this embodiment, hydrophilic strips 701 are provided on both the upper and lower surfaces of the baffle 7. Gas carrying moisture and raw materials enters the separation chamber 604 from the bottom of the separation tank 6 in the fermentation tank 2. The gas first collides with the lowermost baffle 7 and flows upward through the ventilation gap 704, colliding sequentially with other baffles 7 within the separation tank 6. During this collision, moisture and raw materials adhere to the surface of the baffle 7, and the moisture carries the raw materials to the hydrophilic strips 701, eventually flowing into the fermentation tank 2 under gravity. Moisture and raw materials from the baffle 7 above the separation tank 6 flow to the upper surface of the baffle 7 below it, also flowing into the fermentation tank 2 under gravity. Therefore, hydrophilic strips 701 are also provided on the upper surface of the baffle 7 to facilitate the collection and downward flow of moisture and raw materials. The separated gas flows out from the top of the separation chamber 604 and finally enters the gas collection tank 3 through the gas delivery pipe 5, purifying the fermentation gas and facilitating subsequent research on the fermentation gas.

[0032] The above are the basic embodiments of this utility model. Further improvements, optimizations, and limitations can be made based on the above to obtain the following embodiments:

[0033] Example 2

[0034] This embodiment is an improvement on embodiment 1. Its main structure is the same as that of embodiment 1, but the improvement lies in: [The following is a more detailed description of the improvement.] Figure 2As shown, a clean gas tank 1, which is closed at both ends, is fitted over the separator 6. The clean gas tank 1 can be a circular cylindrical structure or a square cylindrical structure closed at both ends. In this embodiment, the clean gas tank 1 is a square cylindrical structure closed at both ends, and the center line of the clean gas tank 1 coincides with the center line of the separator 6. An air outlet channel is formed between the inner wall of the clean gas tank 1 and the outer wall of the separator 6. The top of the separator 604 is connected to the air outlet channel. An air outlet hole 101 is provided at the bottom of the clean gas tank 1 to connect the air outlet channel and the gas delivery pipe 5. The air outlet hole 101 is located at the bottom of the side wall of the clean gas tank 1. The end of the gas delivery pipe 5 away from the gas collecting tank 3 passes through the air outlet hole 101 and is sealed to the inner wall of the air outlet hole 101.

[0035] During the collision between the gas and the baffle 7, a very small amount of water will break into smaller droplets. The gas carries these water droplets out of the separation chamber 604 and into the gas outlet channel. Therefore, in order to further improve the purification effect of the fermentation gas, the gas outlet channel is filled with adsorbent 102. Adsorbent 102 can adsorb water droplets and fine raw materials in the gas, further purifying the fermentation gas and improving the separation effect.

[0036] Example 3

[0037] This embodiment is an improvement on embodiment 2. Its main structure is the same as that of embodiment 2, but the improvement lies in further defining the separation tank 6, such as… Figure 2 As shown, in this embodiment, the two ends of the separator 6 are open, and there is a connecting gap 601 between the top of the separator 6 and the top wall of the clean gas tank 1 for connecting the separator 604 and the gas outlet channel. The purified gas flows out through the top opening of the separator 604, flows through the connecting gap 601 and enters the gas outlet channel, and finally enters the gas transmission pipeline 5 through the gas outlet hole 101.

[0038] Example 4

[0039] This embodiment is an improvement on embodiment 2. Its main structure is the same as that of embodiment 2, but the improvement lies in further defining the separation tank 6, such as… Figure 3 As shown, in this embodiment, the separation tank 6 has an open bottom and a closed top. The top of the separation tank 6 has several connecting holes 605 for connecting the separation chamber 604 and the gas outlet channel. In this embodiment, the connecting holes 605 are circular holes located on the top side wall of the separation tank 6. There are four connecting holes 605, each located on one of the four side walls of the separation tank 6, allowing the purified gas to flow out from multiple directions, thus improving the utilization rate of the adsorbent 102. This prevents the purified gas from flowing out from a fixed direction and only passing through the adsorbent 102 on the right side of the separation tank 6, thus avoiding waste of the adsorbent 102.

[0040] Example 5

[0041] This embodiment is an improvement on embodiment 1. Its main structure is the same as that of embodiment 1, but the improvement lies in further defining the baffle 7, such as… Figure 2 As shown, the baffle 7 is inclined and its top end is connected to the inner side wall of the separation tank 6. Its bottom end extends toward the separation chamber 604 and forms an air gap 704 with the side wall of the baffle 7. This can prevent moisture and raw materials from depositing at the angle formed between the baffle 7 and the side wall of the separation tank 6, and ensure that the moisture and raw materials adsorbed on the baffle 7 flow down under the action of gravity and eventually flow into the fermentation tank 2.

[0042] Example 6

[0043] This embodiment is an improvement on embodiment 5. Its main structure is the same as that of embodiment 5, but the improvement lies in: [The following is a more detailed description of the improvement.] Figure 5 As shown, the hydrophilic strip 701 is a rectangular strip structure that extends along the inclined direction of the baffle 7. There are multiple hydrophilic strips 701 and they are evenly distributed along the inclined direction perpendicular to the baffle 7. In this embodiment, there are 9 hydrophilic strips 701 on both the upper and lower surfaces of the baffle 7 and they are evenly distributed along the inclined direction perpendicular to the baffle 7. The water and raw materials adsorbed on the lower surface of the baffle 7 gather on the hydrophilic strip 701 and flow down under the action of gravity. The water and raw materials adsorbed on the upper surface of the baffle 7 or the water and raw materials from the baffle 7 above it gather on the hydrophilic strip 701 and flow down under the action of gravity, eventually flowing into the fermentation tank 2.

[0044] Example 7

[0045] This embodiment is an improvement on embodiment 5. Its main structure is the same as that of embodiment 5, but the improvement lies in: [The following is a more detailed description of the improvement.] Figure 6 As shown, the hydrophilic strip 701 includes a first part 702 located at the center of the baffle 7 and extending along the inclined direction of the baffle 7. Multiple second parts 703 are inclinedly arranged on both sides of the first part 702. The second parts 703 on both sides of the first part 702 are symmetrically arranged. The top of the second part 703 faces the top of the baffle 7, and the bottom of the second part 703 is connected to the first part 702. The water and raw materials adsorbed in the second part 703 eventually converge in the first part 702 and fall under the action of gravity.

[0046] Example 8

[0047] This embodiment is an improvement on embodiment 7. Its main structure is the same as that of embodiment 7, but the improvement lies in: [The following is a more detailed description of the improvement.] Figure 4As shown, a plurality of guide rods 705 are provided at the bottom end of the baffle 7. The top end of the guide rod 705 is connected to the baffle 7, and the bottom end of the guide rod 705 overlaps the hydrophilic strip 701 of the baffle 7 below it. In this embodiment, there is one guide rod 705, which is vertically arranged. The top end of the guide rod 705 is fixedly connected to the edge of the baffle 7, and the connection point between the two is located at the bottom end of the first part 702 of the baffle 7. The bottom end of the guide rod 705 overlaps the first part 702 of the baffle 7 below it, which improves the convergence speed of water and raw materials, thereby improving the separation efficiency.

[0048] Example 9

[0049] A system for laboratory composting fermentation gases includes a fermentation tank 2, the top of which is connected to a gas collection device, which is the collection device described in any of the embodiments 1-8.

[0050] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for collecting gases from laboratory composting fermentation, comprising a gas collecting tank (3) connected to a fermentation tank (2) via a gas supply pipe (5), wherein a vacuum generator (4) is installed on the gas supply pipe (5), characterized in that: A separation tank (6) is installed above the fermenter (2) and has a separation chamber (604) at the center of the gas pipeline (5) away from the gas collecting tank (3). The bottom end of the separation chamber (604) is connected to the fermenter (2), and the top end of the separation chamber (604) is connected to the gas pipeline (5). Multiple baffles (7) are provided on the inner side wall of the separation tank (6), which are staggered along their height direction and coated with hydrophilic strips (701). One end of the baffle (7) is connected to the side wall of the separation tank (6). (7) has a ventilation gap (704) between the other end of the separator (6) and the other side wall of the separator (6) for gas to pass through. The gas carrying moisture and raw materials in the fermenter (2) enters the separation chamber (604) from the bottom of the separator (6) and collides with the baffle (7). The moisture and raw materials in the gas adhere to the baffle (7) and converge on the hydrophilic strip (701), and finally flow back into the fermenter (2). The separated gas flows out from the top of the separation chamber (604) and finally enters the gas collection tank (3) through the gas pipeline (5).

2. The laboratory composting fermentation gas collection device as described in claim 1, characterized in that: The separator (6) is fitted with a clean gas tank (1) that is closed at both ends. An air outlet channel is formed between the inner side wall of the clean gas tank (1) and the outer side wall of the separator (6). The top of the separator (604) is connected to the air outlet channel. An air outlet hole (101) is provided at the bottom of the clean gas tank (1) to connect the air outlet channel and the gas pipeline (5).

3. The laboratory composting fermentation gas collection device as described in claim 2, characterized in that: The gas outlet channel is filled with an adsorbent (102) for absorbing residual moisture in the gas.

4. The laboratory composting fermentation gas collection device as described in claim 2, characterized in that: The separator (6) has openings at both ends, and there is a communication gap (601) between the top of the separator (6) and the top wall of the clean gas tank (1) for connecting the separator (604) and the gas outlet channel.

5. The laboratory composting fermentation gas collection device as described in claim 2, characterized in that: The separator (6) has a structure with an open bottom and a closed top, and the top of the separator (6) has several connecting holes (605) for connecting the separator (604) and the air outlet.

6. The laboratory composting fermentation gas collection device as described in claim 1, characterized in that: The baffle (7) is inclined and its top end is connected to the inner wall of the separation tank (6), while its bottom end extends toward the separation chamber (604).

7. The laboratory composting fermentation gas collection device as described in claim 6, characterized in that: The hydrophilic strip (701) is a rectangular strip structure that extends along the inclined direction of the baffle (7). There are multiple hydrophilic strips (701) and they are evenly distributed along the inclined direction perpendicular to the baffle (7).

8. The laboratory composting fermentation gas collection device as described in claim 6, characterized in that: The hydrophilic strip (701) includes a first part (702) located at the center of the baffle (7) and extending along the inclined direction of the baffle (7). Multiple second parts (703) are inclinedly arranged on both sides of the first part (702), and the bottom end of the second part (703) is connected to the first part (702).

9. The laboratory composting fermentation gas collection device as described in claim 8, characterized in that: The bottom end of the baffle (7) is provided with several guide rods (705). The top end of the guide rods (705) is connected to the baffle (7), and the bottom end of the guide rods (705) overlaps the hydrophilic strip (701) of the baffle (7) below it.

10. A system for collecting gas from laboratory composting fermentation, comprising a fermenter (2), the top of which is connected to a gas collection device, characterized in that: The collection device is a laboratory composting fermentation gas collection device as described in any one of claims 1-9.

Images