Energy-saving rural domestic sewage fermentation pretreatment device

Abstract

The utility model provides an energy-saving rural domestic sewage fermentation pretreatment device, which comprises a sedimentation tank, a filter screen plate and a fermentation tank, the sedimentation tank is provided with a water injection port for sewage to enter, a plurality of rotating rollers are rotatably arranged between the inner walls of the sedimentation tank, the rotating rollers are sleeved with a conveyor belt, the conveyor belt is of a hollow structure, the conveyor belt is obliquely arranged, and the filter screen plate is arranged on the fermentation tank. The high end of the conveying belt extends out of the sedimentation tank, a first motor for driving one rotating roller to rotate is further arranged on the side wall of the sedimentation tank, the filter screen plate is horizontally arranged between the inner walls of the sedimentation tank and located below the conveying belt, and a removing assembly for removing filter residues on the filter screen plate is arranged in the sedimentation tank. The bottom of the fermentation tank is communicated with the bottom of the sedimentation tank through a conveying pipe, the horizontal height of the fermentation tank is located below the sedimentation tank, and the problem that in the prior art, when domestic sewage is filtered, filtered filter residues are not easy to clean after being stacked is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to an energy-saving rural domestic sewage fermentation pretreatment device. Background Art

[0002] Rural sewage contains a large amount of organic matter and nutrients such as nitrogen and phosphorus. These substances mainly come from human and animal excrement, kitchen wastewater and agricultural activities (such as fertilizer loss). If these substances are not treated, they can easily lead to eutrophication of water bodies. Therefore, when treating rural sewage, the sewage is generally filtered and fermented, and the fermentation products are separated to make fertilizer, so as to achieve the purpose of turning waste into treasure.

[0003] The Chinese patent with publication number CN216863914U discloses an energy-saving rural domestic sewage fermentation pretreatment device, which discharges sewage into a filter frame through a sewage pipe. The motor drives the gear to drive the gear ring meshing with it to rotate, so that the circular frame and the filter frame rotate, generating centrifugal force to throw away foreign matter, thereby achieving the purpose of sewage filtering. The inventor found in the process of implementing the patent that when the filter frame needs to be cleaned, the filter frame needs to be removed from the circular frame. In order to increase the processing capacity, the filter frame needs to be made very large. The larger the filter frame, the more manpower and time it will take to take it out. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides an energy-saving rural domestic sewage fermentation pretreatment device, which solves the problem in the prior art that when filtering domestic sewage, the filtered residue is accumulated and difficult to clean.

[0005] According to an embodiment of the utility model, an energy-saving rural domestic sewage fermentation pretreatment device includes a sedimentation tank, a filter screen plate and a fermentation tank. A water inlet for sewage to enter is opened on the sedimentation tank. A plurality of rotating rollers are rotatably provided between the inner walls of the sedimentation tank. A conveyor belt is sleeved on the rotating roller. The conveyor belt is a hollow structure. The conveyor belt is tilted. The high end of the conveyor belt extends out of the sedimentation tank. A first motor that drives one of the rotating rollers to rotate is also provided on the side wall of the sedimentation tank. The filter screen plate is horizontally arranged between the inner walls of the sedimentation tank and is located below the conveyor belt. A cleaning component for removing filter residue on the filter screen plate is provided in the sedimentation tank. The fermentation tank is connected to the bottom of the sedimentation tank through a conveying pipe. The horizontal height of the fermentation tank is located below the sedimentation tank.

[0006] Compared with the prior art, the utility model has the following beneficial effects: by injecting sewage into the conveyor belt in the sedimentation tank, the hollow structure of the conveyor belt blocks larger domestic garbage and finally discharges it to the outside; the sewage filtered by the conveyor belt enters the filter screen and is filtered again by the filter screen; the filter residue filtered out by the filter screen is removed to the outside by the cleaning component to avoid its accumulation on the filter screen and affecting the filtering efficiency of the filter screen; finally, the sewage enters the fermentation tank and ferments to produce biogas; the device uses the hollow conveyor belt and the secondary filtration of the filter screen to prevent larger filter residues from being contained in the sewage; at the same time, the conveyor belt conveys and the cleaning component removes the top of the filter screen, and the debris in the sewage is discharged to the outside in time; the whole process is convenient and quick, and workers do not need to clean the sedimentation tank separately, saving manpower and time.

[0007] Furthermore, the cleaning component includes: a slider, which is horizontally and slidably arranged in the sedimentation tank through a guide rail, a scraper is provided on the side wall of the slider, a discharge port is opened on the inner wall of the sedimentation tank facing the scraper, a closing plate is rotatably provided at the discharge port through a rotating shaft, a second motor for driving the rotating shaft to rotate is provided on the side wall of the sedimentation tank, and a driving mechanism for driving the slider to slide along the guide rail is also provided in the sedimentation tank.

[0008] Furthermore, a plurality of baffles are provided on the outer surface of the conveyor belt.

[0009] Furthermore, it also includes a squeezing roller, which is rotatably arranged between the inner walls of the sedimentation tank and is located above the conveyor belt.

[0010] Furthermore, it also includes a solar panel, which is fixedly arranged on the top of the sedimentation tank and is electrically connected to the first motor and the second motor through a controller.

[0011] Furthermore, a stirring shaft is rotatably provided in the fermentation tank, a third motor is provided on the top of the fermentation tank, an output end of the third motor is fixedly connected to the stirring shaft, and a plurality of stirring blades are provided at equal intervals on the circumference of the stirring shaft.

[0012] Furthermore, it also includes a rotating disk, which is rotatably arranged at the bottom of the inner wall of the fermentation tank, the top of the rotating disk is fixedly connected to the stirring shaft, and the top of the rotating disk is also provided with some interfering moving blades. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model.

[0014] Figure 2 It is a cross-sectional view of the overall structure of an embodiment of the utility model.

[0015] Figure 3 This is a cross-sectional view of a sedimentation tank according to an embodiment of the utility model.

[0016] Figure 4 This is a cross-sectional view of a fermentation tank according to an embodiment of the present utility model.

[0017] In the above drawings: 1, sedimentation tank; 2, rotating roller; 3, conveyor belt; 4, first motor; 5, filter screen; 6, fermentation tank; 7, slider; 8, scraper; 9, closing plate; 10, second motor; 11, baffle; 12, squeeze roller; 13, solar panel; 14, stirring shaft; 15, stirring blade; 16, third motor; 17, rotating disk; 18, disturbance blade. DETAILED DESCRIPTION

[0018] The technical solution of the present utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0019] like Figure 1As shown in FIG. 3 , an embodiment of the utility model proposes an energy-saving rural domestic sewage fermentation pretreatment device, comprising a sedimentation tank 1, a filter screen plate 5 and a fermentation tank 6. A water inlet for sewage to enter is opened on the sedimentation tank 1. A plurality of rotating rollers 2 are rotatably arranged between the inner walls of the sedimentation tank 1. A conveyor belt 3 is sleeved on the rotating roller 2. The conveyor belt 3 is a hollow structure. The conveyor belt 3 is tilted. The high end of the conveyor belt 3 extends out of the sedimentation tank 1. A first motor 4 for driving one of the rotating rollers 2 to rotate is also provided on the side wall of the sedimentation tank 1. The filter screen plate 5 is horizontally arranged between the inner walls of the sedimentation tank 1 and is located below the conveyor belt 3. A cleaning component for removing filter residues on the filter screen plate 5 is provided in the sedimentation tank 1. The fermentation tank 6 is connected to the bottom of the sedimentation tank 1 through a conveying pipe. The horizontal height of the fermentation tank 6 is located below the sedimentation tank 1. During operation, sewage is injected into the sedimentation tank 1 from the water inlet of the sedimentation tank 1, and the sewage will be discharged onto the conveyor belt 3. The conveyor belt 3 rotates under the drive of the first motor 4. Large debris in the sewage (such as plastic bags, leaves, etc.) cannot pass through the hollow structure on the conveyor belt 3, and thus follows the movement of the conveyor belt 3 to move toward the high end of the conveyor belt 3, and is finally discharged to the outside of the sedimentation tank 1 for separate treatment. When the sewage screened by the conveyor belt 3 passes through the filter screen plate 5, it is screened by the filter screen plate 5 again. At this time, the liquid and fine particles in the sewage can pass through the filter screen plate 5 and fall into the bottom of the sedimentation tank 1. As the filter residue on the filter screen plate 5 accumulates more and more, the cleaning component can be started at this time to remove the residue on the filter screen plate 5. On the other hand, by opening the valve of the conveying pipe, the sewage at the bottom of the sedimentation tank 1 is discharged into the fermentation tank 6. The level of the fermentation tank 6 is lower than the level of the sedimentation tank 1, so that the sewage can flow into the fermentation tank 6 under the action of gravity, saving energy. Since the sewage will first be filtered through the hollow structure on the conveyor belt 3 when it is discharged into the sedimentation tank 1, the daily debris can be discharged out of the sedimentation tank 1 by the conveyor belt 3 in time, avoiding it from increasing the subsequent filtering burden. The filter residue filtered out by the filter screen plate 5 can also be removed in time through the cleaning component after being accumulated on the filter screen plate 5, thereby ensuring the filtering efficiency of the filter screen plate 5. It can be directly removed at any time through the cleaning component in the sedimentation tank 1, which is convenient and quick.

[0020] like Figure 1—3, further, the cleaning component includes: a slider 7, the slider 7 is horizontally and slidably arranged in the sedimentation tank 1 through a guide rail, a scraper 8 is arranged on the side wall of the slider 7, a discharge port is opened on the inner wall of the sedimentation tank 1 facing the scraper 8, a closing plate 9 is rotatably provided at the discharge port through a rotating shaft, a second motor 10 for driving the rotating shaft to rotate is arranged on the side wall of the sedimentation tank 1, and a driving mechanism for driving the slider 7 to slide along the guide rail is also arranged in the sedimentation tank 1. In this embodiment, the scraper 8 has a triangular cross section, and the scraper 8 is arranged on the right side wall of the slider 7 and its side length is shorter than the height of the slider 7. When working, the driving assembly drives the slider 7 to move toward the discharge port. While the slider 7 is moving, the scraper 8 scrapes off the filter residue on the top of the filter screen plate 5. The filter residue moves toward the discharge port under the push of the slider 7 and the scraper 8. The second motor 10 drives the rotating shaft to rotate so that the closing plate 9 opens the discharge port, so that the filter residue is discharged from the discharge port under the push of the slider 7 and the scraper 8. After the discharge is completed, the slider 7 returns to its original position, and the second motor 10 drives the rotating shaft to rotate again so that the closing plate 9 closes the discharge port. The driving mechanism can be a screw rod horizontally arranged on the inner wall of the sedimentation tank 1, the screw rod is threadedly connected to the slider 7, and then driven by the motor to rotate the screw rod, or a motor is arranged on the slider 7, a gear is fixedly arranged at the output end of the motor, and teeth meshing with the gear are arranged on the side wall of the guide rail, or a chain transmission method is used, which are all prior arts.

[0021] like Figure 1 and 3 As shown, further, a plurality of baffles 11 are provided on the outer surface of the conveyor belt 3. When the garbage in the sewage falls onto the conveyor belt 3, the baffles 11 block the garbage, so that the garbage will not slide to the lower end of the conveyor belt 3 and can be promptly conveyed to the outside by the conveyor belt 3.

[0022] like Figure 3 As shown, further, it also includes a squeezing roller 12, which is rotatably arranged between the inner walls of the sedimentation tank 1, and the squeezing roller 12 is located above the conveyor belt 3. When the domestic garbage on the conveyor belt 3 is transported toward the high end of the conveyor belt 3, a large amount of sewage accumulates on the domestic garbage. By passing through the squeezing roller 12, the squeezing roller 12 changes the state of the domestic garbage so that the sewage on it flows down, and squeezes the large pieces of domestic garbage on the other hand, discharges the sewage on it, and reduces the burden for the subsequent treatment of domestic garbage.

[0023] like Figure 1—4, further, it also includes a solar panel 13, which is fixedly arranged on the top of the sedimentation tank 1, and the solar panel 13 is electrically connected to the first motor 4 and the second motor 10 through a controller. Houses in rural areas are generally shorter, and the solar panel 13 will not be blocked by buildings and is more likely to receive sunlight. The solar panel 13 is used to power various components to achieve the purpose of energy saving. If necessary, a battery can be set to store electrical energy. The connection relationship between the solar panel 13 and various power supply components is all existing technology, and no further elaboration is made here.

[0024] like Figure 2 and 4 As shown, further, a stirring shaft 14 is rotatably provided in the fermentation tank 6, a third motor 16 is provided on the top of the fermentation tank 6, the output end of the third motor 16 is fixedly connected to the stirring shaft 14, and a plurality of stirring blades 15 are provided at equal intervals on the circumference of the stirring shaft 14. During operation, the third motor 16 drives the stirring shaft 14 to rotate, so that the stirring blades 15 stir the sewage in the fermentation tank 6, so that the sewage can be fully mixed with the anaerobic bacteria to produce biogas, while also avoiding precipitation in the fermentation tank 6. In this embodiment, a hose is connected to the side wall of the fermentation tank 6, and the hose can be connected to the corresponding equipment to collect the biogas. A discharge pipe is provided at the bottom of the fermentation tank 6, and the discharge pipe discharges the remaining sewage after fermentation and then processes it for use as fertilizer or soil conditioner.

[0025] like Figure 2 and 4 As shown, further, it also includes a rotating disk 17, which is rotatably arranged at the bottom of the inner wall of the fermentation tank 6, and the top of the rotating disk 17 is fixedly connected to the stirring shaft 14. The top of the rotating disk 17 is also provided with a plurality of disturbing blades 18. When the stirring shaft 14 rotates, the rotating disk 17 is also driven to rotate, and the disturbing blades 18 on the rotating disk 17 disturb the sewage at the bottom of the fermentation tank 6 so that it can be stirred by the stirring blades 15, thereby avoiding the phenomenon of precipitation at the bottom of the fermentation tank 6.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. An energy-saving rural domestic sewage fermentation pretreatment device, characterized in that: include: A sedimentation tank (1), wherein a water inlet for sewage to enter is provided on the sedimentation tank (1), a plurality of rotating rollers (2) are rotatably provided between the inner walls of the sedimentation tank (1), a conveyor belt (3) is sleeved on the rotating rollers (2), the conveyor belt (3) is a hollow structure, the conveyor belt (3) is inclined, the high end of the conveyor belt (3) extends out of the sedimentation tank (1), and a first motor (4) for driving one of the rotating rollers (2) to rotate is also provided on the side wall of the sedimentation tank (1); A filter screen plate (5) is horizontally arranged between the inner walls of the sedimentation tank (1) and is located below the conveyor belt (3). A cleaning component for cleaning filter residue on the filter screen plate (5) is provided in the sedimentation tank (1); The fermentation tank (6) is connected to the bottom of the sedimentation tank (1) through a conveying pipe, and the level of the fermentation tank (6) is located below the sedimentation tank (1).

2. The energy-saving rural domestic sewage fermentation pretreatment device according to claim 1, characterized in that: The cleaning component comprises: a slider (7), the slider (7) is horizontally and slidably arranged in a sedimentation tank (1) via a guide rail, a scraper (8) is arranged on the side wall of the slider (7), a discharge port is opened on the inner wall of the sedimentation tank (1) facing the scraper (8), a closing plate (9) is rotatably arranged at the discharge port via a rotating shaft, a second motor (10) for driving the rotating shaft to rotate is arranged on the side wall of the sedimentation tank (1), and a driving mechanism for driving the slider (7) to slide along the guide rail is also arranged in the sedimentation tank (1).

3. The energy-saving rural domestic sewage fermentation pretreatment device according to claim 1, characterized in that: A plurality of baffles (11) are arranged on the outer surface of the conveyor belt (3).

4. The energy-saving rural domestic sewage fermentation pretreatment device according to claim 3, characterized in that: It also comprises a squeezing roller (12), which is rotatably arranged between the inner walls of the sedimentation tank (1), and the squeezing roller (12) is located above the conveyor belt (3).

5. The energy-saving rural domestic sewage fermentation pretreatment device according to claim 1, characterized in that: It also includes a solar panel (13), which is fixedly arranged on the top of the sedimentation tank (1), and the solar panel (13) is electrically connected to the first motor (4) and the second motor (10) through a controller.

6. The energy-saving rural domestic sewage fermentation pretreatment device according to claim 1, characterized in that: A stirring shaft (14) is rotatably arranged in the fermentation tank (6), a third motor (16) is arranged on the top of the fermentation tank (6), an output end of the third motor (16) is fixedly connected to the stirring shaft (14), and a plurality of stirring blades (15) are arranged at equal intervals in the circumferential direction of the stirring shaft (14).

7. An energy-saving rural domestic sewage fermentation pretreatment device as claimed in claim 6, characterized in that: It also includes a rotating disk (17), which is rotatably arranged at the bottom of the inner wall of the fermentation tank (6), the top of the rotating disk (17) is fixedly connected to the stirring shaft (14), and the top of the rotating disk (17) is also provided with a plurality of interfering moving blades (18).

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