Anaerobic fermentation device

Abstract

The utility model discloses an anaerobic fermentation device and belongs to the technical field of anaerobic fermentation. The anaerobic fermentation device comprises a fermentation tank and a sampling pipe communicated with the fermentation tank, an inclined bottom surface is arranged at the bottom of the fermentation tank, one end of the inclined bottom surface is high, the other end of the inclined bottom surface is low, the sampling pipe is arranged on the outer side of the fermentation tank in the vertical direction, the sampling pipe is communicated with the low end of the inclined bottom surface, and a valve is arranged on the sampling pipe; the utility model has the advantages that the condition that old samples are mixed with new samples is avoided, the blocking risk of the sampling pipe is reduced, and the sampling pipe is convenient to dredge.

Description

Technical Field

[0001] This utility model relates to the field of anaerobic fermentation technology, and in particular to an anaerobic fermentation device. Background Technology

[0002] Dry anaerobic digestion is a rapidly developing new technology in recent years, showing great promise in livestock and poultry manure treatment, straw gasification, and kitchen waste treatment. It boasts advantages such as low requirements for raw material pretreatment, low biogas slurry production, low energy consumption, and convenient management. It is a specialized anaerobic digestion technology for complex organic waste with a solids content greater than 15%. One of the core components of a dry anaerobic system is its biochemical system. Within the dry anaerobic digester containing a mixture of sludge and other materials, anaerobic organisms react with the organic waste in the feed through controlled temperature and a strictly anaerobic environment, producing biogas. The biochemical system is crucial to the operation of the dry anaerobic system, therefore routine sampling and testing are essential. Sampling requires ensuring sample accuracy. However, existing sampling devices contain old materials in their pipes, causing them to mix with new materials during sampling, leading to deviations in test results. Furthermore, the diverse nature of incoming materials in the dry anaerobic system, coupled with the presence of numerous impurities, makes existing sampling devices prone to blockages. This results in two problems: 1. The sampling valve blocks before opening, preventing sampling and requiring manual unblocking; 2. The sampling valve blocks during sampling, causing significant material leakage onto the ground. Either scenario negatively impacts normal production operations.

[0003] To address the aforementioned problems, utility model publication CN217025943U discloses a novel dry anaerobic fermentation device, comprising a dry anaerobic fermenter, a sampling pipe, a sampling bucket, a first valve, a second valve, and a third valve. The sampling pipe connects the dry anaerobic fermenter and the sampling bucket, and the first, second, and third valves are sequentially installed on the sampling pipe from the dry anaerobic fermenter to the sampling bucket. This novel dry anaerobic fermentation device improves the sampling device of the dry anaerobic tank by adding a set of pneumatic valves, ensuring the accuracy of the sampling results. When the second and third valves become blocked, the first valve can be closed, and the valves can be manually cleared. Clearing the blockage prevents significant material leakage and ensures a clean and hygienic production environment. This utility model has a simple structure, is easy to operate, and is highly practical.

[0004] However, in actual production, the old samples remaining in the sampling tube and the resulting blockage are partly due to insufficient moisture in the sampling tube. This causes the old samples to stick to the tube wall and dry out. When sampling again, the old samples are either flushed into the new samples or become stuck in the tube, causing the aforementioned problems. The above solution still carries the risk of blockage when there is insufficient moisture. Utility Model Content

[0005] The purpose of this invention is to solve the problem that sampling tubes may still become clogged if the material has low moisture content during the use of existing anaerobic fermentation devices, and to propose an anaerobic fermentation device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An anaerobic fermentation device includes a fermenter and a sampling tube connected to the fermenter. The bottom of the fermenter is provided with an inclined bottom surface, one end of which is higher than the other. A sampling tube is provided on the outside of the fermenter along the vertical direction. The sampling tube is connected to the lower end of the inclined bottom surface. A valve is provided on the sampling tube.

[0008] Furthermore, the sampling tube is a straight cylindrical structure with openings at the top and bottom. A cap is provided at the top of the sampling tube, and a valve is provided at the bottom of the sampling tube, with the valve located below the inclined bottom surface.

[0009] Furthermore, the sampling tube includes a liquid storage tube at the top and a discharge tube at the bottom, the top of the liquid storage tube is provided with a cap, and the valve is installed on the discharge tube.

[0010] Furthermore, an observation window is provided on the side of the liquid storage tube.

[0011] Furthermore, the bottom of the observation window is located below the lower end of the inclined bottom surface, and the top of the observation window is located above the higher end of the inclined bottom surface.

[0012] Furthermore, the fermenter is provided with a feeding port at the top.

[0013] Furthermore, a sampling bucket is provided below the sampling tube.

[0014] Compared with the prior art, the present invention provides an anaerobic fermentation device with the following beneficial effects:

[0015] This utility model discloses an anaerobic fermentation device. During the material fermentation process, because the bottom of the fermentation tank is inclined, the fermentation liquid in the material will automatically gather at the lower end of the inclined bottom. The sampling tube is connected to the lower end of the inclined bottom, so that the sampling tube is always filled with fermentation liquid. This avoids the material from sticking to the side wall of the sampling tube during sampling. Furthermore, because the sampling tube is vertically set, it is not easy for old samples to remain in the sampling tube each time a sample is taken. This solves the problem of old samples mixing with new samples each time a sample is taken, and the sampling tube is not easy to get clogged.

[0016] Other advantages, objectives and features of this invention will be set forth in part in the description which follows; and in part will be apparent to those skilled in the art upon examination of the following description; or may be taught from practice of this invention. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a front view schematic diagram of the overall structure of this utility model;

[0019] Figure 3 This is a schematic cross-sectional view of the overall structure of this utility model from the front view direction;

[0020] Figure 4 For the present utility model Figure 3 Enlarged schematic diagram of part A in the middle.

[0021] In the picture:

[0022] 1. Fermentation tank; 101. Inclined bottom; 102. Feeding port; 2. Sampling tube; 201. Cover; 202. Liquid storage tube; 203. Observation window; 204. Discharge tube; 3. Valve; 4. Sampling bucket; 5. Column; 6. Connecting pipe. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Reference Figure 1-4 This utility model discloses an anaerobic fermentation device, comprising a fermenter 1 and a sampling tube 2 connected to the fermenter 1. The fermenter 1 in this application is exemplified by a cylindrical tank. The bottom of the fermenter 1 is an inclined bottom surface 101, which can be a plane or a curved surface. One end of the inclined bottom surface 101 is higher than the other. Figure 1-2As shown, the inclined bottom surface 101 is higher on the left and lower on the right, and a column 5 is installed at the bottom of the fermentation tank 1.

[0025] A sampling tube 2 is installed vertically on the outside of the fermenter 1. The sampling tube 2 is attached to the fermenter 1 and is connected to the lower end of the inclined bottom surface 101. A valve 3 is installed on the sampling tube 2. During the anaerobic fermentation process, the moisture in the material put into the fermenter 1 forms fermentation liquid. The fermentation liquid automatically gathers at the lower end of the inclined bottom surface 101 and fills the sampling tube 2, preventing the inside of the sampling tube 2 from drying out.

[0026] Furthermore, the sampling tube 2, which is set vertically, is less likely to have old fermentation liquid or materials left inside after each sampling.

[0027] The sampling tube 2 is a straight cylindrical structure with openings at the top and bottom. A cap 201 is detachably installed on the top of the sampling tube 2. A valve 3 is installed at the bottom of the sampling tube 2. The valve 3 is located below the inclined bottom surface 101, so that all the fermentation liquid in the fermenter 1 can flow into the valve 3 in the sampling tube 2.

[0028] The top of the sampling tube 2 is covered so that when the sampling tube 2 becomes blocked due to other reasons, the cover 201 can be removed and the inside of the sampling tube 2 can be cleared from the top.

[0029] The sampling tube 2 includes a liquid storage tube 202 located at the top and a discharge tube 204 located at the bottom. A cover 201 is installed on the top of the liquid storage tube 202, and a valve 3 is installed on the discharge tube 204. After the fermentation liquid fills the discharge tube 204, the liquid level will continue to rise and enter the liquid storage tube 202.

[0030] An observation window 203 is installed on the side of the liquid storage tube 202. The observation window 203 is used to observe the liquid level in the liquid storage tube 202, thereby determining the amount of fermentation liquid in the fermenter 1.

[0031] The sampling tube 2 is connected to the fermenter 1 through the connecting tube 6. Since the sampling tube 2 is attached to the outer wall of the fermenter 1, the connecting tube 6 is relatively short and is not prone to blockage.

[0032] The bottom of the observation window 203 is located below the lower end of the inclined bottom surface 101, and the top of the observation window 203 is located above the higher end of the inclined bottom surface 101. Since less water is produced during anaerobic fermentation, but the growth of fermenting bacteria still requires a certain temperature and humidity, it is necessary to ensure that there is a certain amount of water in the material in the fermentation tank 1. Through the observation window 203, it can be seen whether fermentation liquid has entered the sampling tube 2 in the connecting pipe 6, and the liquid level of the fermentation liquid in the sampling tube 2.

[0033] The top of the fermentation tank 1 is provided with a feeding port 102. The fermentation material is fed into the fermentation tank 1 through the feeding port 102. At the same time, the moisture content of the material is judged by the amount and level of the fermentation liquid seen in the observation window 203. When the moisture content is low, water can be added to the material through the feeding port 102.

[0034] A sampling bucket 4 is placed below the sampling tube 2. Each time a sample is taken, the valve 3 is opened and the sample flows into the sampling bucket 4.

[0035] Working principle: When in use, the material is put into the fermentation tank 1 through the feeding port 102. During the fermentation process, the fermentation liquid gradually seeps into the bottom of the fermentation tank 1 and flows to the bottom of the inclined bottom surface 101, and finally flows into the discharge pipe 204, filling the discharge pipe 204.

[0036] When sampling is required, valve 3 is opened, and the fermentation liquid and some materials flow from the discharge pipe 204 into the sampling bucket 4.

[0037] When sampling tube 2 needs to be cleared, open the cover 201 and clear the inside of sampling tube 2 from the top. During clearing, the fermentation liquid inside sampling tube 2 has a water seal effect, preventing air from directly entering the interior of fermentation tank 1 through sampling tube 2 and connecting pipe 6. After clearing, open valve 3 to discharge the cleared blockage.

[0038] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

[0039] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0040] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An anaerobic fermentation apparatus, comprising a fermenter (1) and a sampling tube (2) connected to the fermenter (1), characterized in that, The fermenter (1) has an inclined bottom surface (101) at the bottom, with one end of the inclined bottom surface (101) being higher than the other end. A sampling tube (2) is provided on the outside of the fermenter (1) along the vertical direction. The sampling tube (2) is connected to the lower end of the inclined bottom surface (101). A valve (3) is provided on the sampling tube (2).

2. The anaerobic fermentation device according to claim 1, characterized in that, The sampling tube (2) is a straight cylindrical structure with openings at the top and bottom. A cover (201) is provided on the top of the sampling tube (2), and a valve (3) is provided at the bottom of the sampling tube (2). The valve (3) is located below the inclined bottom surface (101).

3. The anaerobic fermentation apparatus according to claim 2, characterized in that, The sampling tube (2) includes a liquid storage tube (202) located at the top and a discharge tube (204) located at the bottom. The top of the liquid storage tube (202) is provided with a cap (201), and the valve (3) is installed on the discharge tube (204).

4. The anaerobic fermentation apparatus according to claim 3, characterized in that, An observation window (203) is provided on the side of the liquid storage tube (202).

5. The anaerobic fermentation apparatus according to claim 4, characterized in that, The bottom of the observation window (203) is located below the lower end of the inclined bottom surface (101), and the top of the observation window (203) is located above the higher end of the inclined bottom surface (101).

6. The anaerobic fermentation apparatus according to claim 1, characterized in that, The fermenter (1) is provided with a feeding port (102) at the top.

7. The anaerobic fermentation apparatus according to claim 1, characterized in that, A sampling bucket (4) is provided below the sampling tube (2).

Images