A multi-stage biological treatment device for rural sewage

Abstract

The invention relates to the technical field of sewage treatment, in particular to a multi-stage biological treatment device for rural sewage, comprising: a main box, a preliminary filter box, a quantitative box, a quantitative device, an accelerating pipe, an aeration device, a secondary filter device, a water outlet pipe, an impeller, and a connecting bearing; the preliminary filter box is slidably installed in the quantitative box; the quantitative device is rotatably installed inside the quantitative box; the quantitative box is fixedly installed on the accelerating pipe; the accelerating pipe is fixedly installed on the main box; the aeration device is fixedly installed inside the main box; the impeller is fixedly connected to the inner ring of the connecting bearing, and the outer ring of the connecting bearing is fixedly connected to the aeration device; the secondary filter device is slidably installed in the main box; the water outlet pipe is fixedly connected to the main box; the sewage is preliminarily filtered by the preliminary filter box, enters the quantitative box for quantitative determination, is discharged to aerobic bacteria and the aeration device for treatment, and then passes through the interval area of ​​the secondary filter device to the anaerobic area for final treatment, and is finally discharged through the water outlet pipe.

Description

Technical Field

[0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a multi-stage biological treatment device for rural sewage. Background Art

[0002] my country's rural domestic sewage discharge is large, and most of it is discharged directly into the environment without treatment, which poses a serious threat to the ecological environment in rural areas and threatens the drinking water safety of local residents. Rural households are scattered and the terrain is very different. It is difficult to lay official roads and requires a lot of investment. Therefore, in-situ modular sewage treatment technology has significant advantages in treating rural sewage.

[0003] Rural sewage has intermittent characteristics, with large discharges during the morning, noon and dinner periods, and small or even no discharges at other times. At the same time, the water quality fluctuates greatly, and is affected by people's living habits or objective conditions (such as open channel drainage), and is often mixed with large-volume garbage such as vegetable leaves and plastics, or particulate pollutants such as mud and sand. The mixing of particulate pollutants can easily lead to blockage of the sewage treatment process, resulting in reduced removal efficiency and shortened service life. In rural areas in the north, the temperature is too low during the freezing period in winter, which will cause the activity of microorganisms to decrease, thereby reducing the removal rate of pollutants, and the effluent often cannot meet the removal standards. Therefore, it is very important to consider how to smoothly transition the in-situ modular sewage treatment process in winter. Overly complex sewage treatment facilities are often shelved due to the lack of professional technicians in rural areas, so the process needs to have the characteristics of simple operation and high removal rate. Summary of the invention

[0004] In view of the above problems, the present invention proposes a multi-stage biological treatment device for rural sewage, which removes solid garbage and most of the particulate pollutants through a preliminary filtering box; the sewage enters the quantitative box, the liquid level in the quantitative box continues to rise, and the buoyancy ball floating on the surface rises, thereby driving the active rod, the connecting rod, and the driven rod, and the top seat on the driven rod pushes the water plug open to achieve the quantitative treatment of the initially treated sewage and discharge it to the next level; then the Laval pipe structure inside the acceleration pipe is accelerated, thereby driving the impeller to evenly break up the falling initially treated sewage to the aeration body and the main box wall, and then the aerobic bacteria attached to the light material of this part further treat the initially treated sewage; then it passes through the secondary filtering device through the interval area to the light material part where the anaerobic bacteria are attached for final treatment, and finally discharged through the outlet pipe.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a multi-stage biological treatment device for rural sewage, comprising: a main box, a preliminary filter box, a quantitative box, a quantitative device, an acceleration pipe, an aeration device, a secondary filter device, a water outlet pipe, an impeller, and a connecting bearing; the preliminary filter box is slidably installed in the quantitative box; the quantitative device is rotatably installed inside the quantitative box and is located at the lower end of the preliminary filter box; the quantitative box is fixedly installed on the acceleration pipe; the acceleration pipe is fixedly installed on the main box; the aeration device is fixedly installed inside the main box; the impeller is fixedly connected to the inner ring of the connecting bearing and is located at the upper end of the aeration device; the outer ring of the connecting bearing is fixedly connected to the aeration device; the secondary filter device is slidably installed in the main box; the water outlet pipe is fixedly connected to the main box and is located on the side close to the secondary filter device.

[0006] Furthermore, the metering device includes: a buoyancy ball, an active rod, a connecting rod, a driven rod, a connecting rod cover, a water plug and a support frame; the buoyancy ball is fixedly installed on one end of the active rod, and the other end thereof is rotatably connected to one end of the connecting rod, and the middle part is rotatably connected to the metering box; the other end of the connecting rod is fixedly connected to one end of the driven rod; a top seat is fixedly installed on the other end of the driven rod, and the middle part is rotatably installed on the metering box and is located at the lower end of the active rod; the support frame is fixedly installed on the water outlet at the lower end of the metering box; the water plug is slidably installed on the support frame; the connecting rod cover is fixedly installed on the metering box and is located at one end of the connecting rod.

[0007] Furthermore, the aeration device includes: a nozzle, an aeration body, an aeration base, an air pump, and a connecting pipe; the aeration body is fixedly installed on the aeration base; the aeration base is fixedly installed inside the main box; there are several nozzles and they are fixedly installed on the side of the aeration body respectively; one end of the connecting pipe is connected to the air pump and the other end is fixedly connected to the aeration body; the air pump is correspondingly installed on one side of the main box close to the aeration device; the gap between the aeration body and the main box is filled with lightweight materials for the biofilm attachment of aerobic bacteria.

[0008] Furthermore, the secondary filtration device includes: a filter box, a filter screen and a partition; the partition is fixedly installed inside the filter box and is located in the middle position; the filter screen has at least two groups slidably installed inside the filter box and is located on both sides of the partition; the space between the filter screen and the partition is filled with lightweight material for anaerobic bacteria to attach biofilms.

[0009] Furthermore, a control device is also included, which includes: a temperature sensor, a controller and a human-computer interaction module; the temperature sensor, the controller and the human-computer interaction module are respectively fixedly installed inside the main box; the temperature sensor and the human-computer interaction module are respectively electrically connected to the controller.

[0010] Furthermore, an exhaust pipe is provided on the main box body and is located on one side of the aeration device for discharging waste gas.

[0011] Furthermore, the interior of the acceleration pipe is a Laval pipe structure, and an air inlet pipe is also provided in the internal secondary cavity for aerobic bacteria to supplement oxygen.

[0012] Furthermore, the water outlet pipe has a plurality of water outlets arranged at different heights, and the water outlets are also provided with drain valves for adjusting the liquid level height inside the main box.

[0013] Furthermore, the entire device is also covered with a cover, and a heat-insulating layer is provided between the inner wall of the cover and the device body to prevent ice from forming in winter and affecting the treatment effect.

[0014] Since the present invention adopts the above technical solution, the present invention has the following advantages:

[0015] 1. Before the sewage enters the main purification device, the large particle pollutants are removed through the pretreatment device, and the sewage is collected and homogenized in the quantitative device, which is conducive to the further treatment of the sewage;

[0016] 2. Make full use of the Laval pipeline structure to increase the water flow rate and directly spray water evenly on the surface of the aerobic section, saving energy.

[0017] 3. The process involved in this application is equipped with insulation facilities such as covers to ensure that the process has a higher processing efficiency in winter.

[0018] 4. The secondary filtering device 7 is a drawer-type filler combination process. When this part of the filler is blocked, the filter screen of the blocked part is extracted, and the blocked filler is replaced accurately and conveniently. There is no need to replace all the fillers as a whole, and the maintenance cost is low.

[0019] 5. The process involved in this application is equipped with multiple drains at different heights. In the non-freezing period, the uppermost drain is used to increase the effective volume of the treatment device, which is conducive to maximizing the treatment efficiency of the device; in the freezing period, after the secondary treatment section is filled with water and the internal water surface freezes, the lower drain is opened to form an ice insulation layer, thereby ensuring that the process still has a high removal efficiency in winter.

[0020] 6. This application realizes the filtration of rural sewage by setting up a preliminary filtration box, an aeration device, and a secondary filtration device, and mainly treats pollutants such as ammonia nitrogen, phosphorus, and heavy metals in the sewage through functional bacterial agents such as aerobic bacteria and anaerobic bacteria.

[0021] 7. The present application realizes unpowered quantitative measurement by setting up quantitative boxes, quantitative devices, acceleration pipes, impellers and other devices, and evenly disperses the sewage onto the inner walls of the main box and the aeration body, which not only saves energy but also enables the sewage to be more evenly in contact with the aeration device and the lightweight material with attached bacterial agents. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a front view of the overall structure of the present invention;

[0024] Figure 3 It is a cross-sectional view of the overall structure of the present invention;

[0025] Figure 4 It is a schematic diagram of the aeration device and the secondary filtration device of the present invention;

[0026] Figure 5 It is a cross-sectional view of the aeration device and the secondary filtration device of the present invention.

[0027] Figure numbers: 1-main box, 2-primary filter box, 3-quantifying box, 4-quantifying device, 5-accelerating pipe, 6-aeration device, 7-secondary filtration device, 8-water outlet pipe, 9-impeller, 10-connecting bearing, 101-exhaust pipe, 401-buoyancy ball, 402-active rod, 403-connecting rod, 404-driven rod, 405-connecting rod cover, 406-water plug, 407-support frame, 501-inlet pipe, 601-nozzle, 602-aeration body, 603-aeration base, 604-air pump, 605-connecting pipe, 701-filter box, 702-filter screen, 703-partition, 801-drain valve. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Among the embodiments of the present invention, all other embodiments obtained by ordinary technical personnel in the field without creative work are within the scope of protection of the present invention.

[0029] See also Figure 1 to Figure 2, this embodiment provides a technical solution: as shown in the figure, a rural sewage multi-stage biological treatment device includes: a main box 1, a preliminary filter box 2, a quantitative box 3, a quantitative device 4, an acceleration pipe 5, an aeration device 6, a secondary filter device 7, a water outlet pipe 8, an impeller 9, and a connecting bearing 10; the preliminary filter box 2 is slidably installed in the quantitative box 3; the quantitative device 4 is rotatably installed inside the quantitative box 3 and is located at the lower end of the preliminary filter box 2; the quantitative box 3 is fixedly installed on the acceleration pipe 5; the acceleration pipe 5 is fixedly installed on the main box 1, the interior of the acceleration pipe 5 is a Laval pipe structure, and an air inlet pipe 501 is also provided in the internal secondary cavity , which is used for aerobic bacteria to supplement oxygen; the aeration device 6 is fixedly installed inside the main box body 1; an exhaust pipe 101 is also provided on the main box body 1, and is located on one side of the aeration device 6, for discharging exhaust gas; the impeller 9 is fixedly connected to the inner ring of the connecting bearing 10, and is located at the upper end of the aeration device 6; the outer ring of the connecting bearing 10 is fixedly connected to the aeration device 6; the secondary filter device 7 is slidably installed in the main box body 1; the water outlet pipe 8 is fixedly connected to the main box body 1, and is located on the side close to the secondary filter device 7; the water pipe 8 has three water outlets, which are arranged at different heights, and the water outlet is also provided with a drain valve 801, which is used to adjust the liquid level height inside the main box body 1.

[0030] When in use, the sewage is initially filtered through the preliminary filter box 2 to filter out the residues and large particles in the water; when entering the quantitative box 3, when the water level inside the quantitative box 3 continues to rise, the buoyancy ball 401 continues to rise with the water level, thereby driving the active rod 402, the connecting rod 403, and the driven rod 404, so that the top seat on the driven rod 404 pushes the water plug 406 open, so as to achieve the quantitative treatment of the sewage treated initially and discharge it to the next level; then the Laval pipe structure inside the acceleration pipe 5 is accelerated, thereby driving the impeller 9 to evenly disperse the falling sewage to the aeration device 6 and the wall of the main box body 1, and then the aerobic bacteria attached to the part of the light material and the aeration device 6 work together to further treat the initially treated sewage; then, it passes through the secondary filtration device 7 through the interval area, and the light material part to which the microbial colony is attached is finally treated, and finally discharged through the outlet pipe 8.

[0031] See also Figures 3 to 5, this embodiment provides a technical solution: the quantitative device 4 includes: a buoyancy ball 401, an active rod 402, a connecting rod 403, a driven rod 404, a connecting rod cover 405, a water plug 406 and a support frame 407; the buoyancy ball 401 is fixedly installed at one end of the active rod 402, and the other end thereof is rotatably connected to one end of the connecting rod 403, and the middle part is rotatably connected to the quantitative box 3; the other end of the connecting rod 403 is fixedly connected to one end of the driven rod 404; the other end of the driven rod 404 is fixedly installed with a top seat, the middle part of which is rotatably installed on the quantitative box 3 and is located at the lower end of the active rod 402; the support frame 407 is fixedly installed at the water outlet at the lower end of the quantitative box 3; the water plug 406 is slidably installed on the support frame 407; the connecting rod cover 405 is fixedly installed on the quantitative box 3, And it is located at one end of the connecting rod 403; since the multi-stage biological treatment device is buried underground as a whole when working, the connecting rod cover 405 effectively protects the rotational connection between the active rod 402, the connecting rod 403, and the driven rod 404; the operation process of the entire quantitative device 4 is as follows: when the water level inside the quantitative box 3 continues to rise, the buoyancy ball 401 continues to rise with the water level, thereby driving the active rod 402, the connecting rod 403, and the driven rod 404, so that the top seat on the driven rod 404 pushes the water plug 406 open, and the preliminary treated sewage is quantitatively discharged to the next level; after the water is drained, the buoyancy ball 401 presses the water plug 406 to block the quantitative box 3, and the support frame 407 fixedly installed at the water outlet at the lower end of the quantitative box 3 guides the water plug 406.

[0032] The aeration device 6 includes: a nozzle 601, an aeration body 602, an aeration base 603, an air pump 604, and a connecting pipe 605; the aeration body 602 is fixedly mounted on the aeration base 603; the aeration base 603 is fixedly mounted inside the main box 1; there are a number of nozzles 601, which are fixedly mounted on the side of the aeration body 602; one end of the connecting pipe 605 is connected to the air pump 604 and the other end is fixedly connected to the aeration body 602; the air pump 604 is correspondingly mounted on the side of the main box 1 close to the aeration device 6; the gap between the aeration body 602 and the main box 1 is filled with light materials for the biofilm attachment of aerobic bacteria; when the aerobic bacteria are used for the first time, the light materials are first filled and then the bacterial agent is placed on the wall of the light materials for biofilm attachment, and the biofilm attachment time is about 7 days;

[0033] The secondary filtering device 7 comprises: a filtering box 701, a filter screen 702 and a partition 703; the partition 703 is fixedly installed inside the filtering box 701 and is located in the middle position; at least two groups of filter screens 702 are slidably installed inside the filtering box 701 and are located on both sides of the partition 703; the space between the filter screen 702 and the partition 703 is filled with light materials for the biofilm attachment of microorganisms; when the microorganisms are used for the first time, the light materials are first filled and then the bacterial agent is placed on the wall of the light materials for biofilm attachment, and the biofilm attachment time is about 7 days; a layer of secondary filtering device 7 is also provided between the anaerobic and aerobic bacteria to isolate the anaerobic and aerobic bacteria, and when the part of the filler is blocked, the filter screen of the blocked part is extracted, and the blocked filler is replaced accurately and conveniently, without the need to replace all the fillers as a whole, and the maintenance cost is low;

[0034] The control device includes: a temperature sensor, a controller and a human-machine interaction module; the temperature sensor, the controller and the human-machine interaction module are fixedly installed inside the main box 1 respectively; the temperature sensor and the human-machine interaction module are electrically connected to the controller respectively; the multi-stage biological treatment device can monitor the internal temperature in real time through the temperature sensor, and transmit it to the controller, which is then analyzed by the controller and then transmitted to the human-machine interaction module to remind the manager of the temperature inside each device. When the temperature is too low, the manager can ask the staff to charge hot air from the air inlet pipe 501 provided in the secondary cavity inside the acceleration pipe 5 to ensure the effective operation and maintenance of the device;

[0035] The entire device is also covered with a cover, and an insulation layer is provided between the inner wall of the cover and the device body to prevent freezing in winter from affecting the treatment effect and to prevent the entire device from being buried underground to isolate soil and dust.

[0036] The above shows and describes the basic principles, main features and advantages of the present invention. Technical personnel in this industry should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A multi-stage biological treatment device for rural sewage, characterized in that ,include: A main housing (1), a preliminary filter box (2), a quantitative box (3), a quantitative device (4), an accelerating pipe (5), an aeration device (6), a secondary filter device (7), a water outlet pipe (8), an impeller (9) and a connecting bearing (10); the preliminary filter box (2) is slidably mounted in the quantitative box (3); the quantitative device (4) is rotatably mounted inside the quantitative box (3) and is located at the lower end of the preliminary filter box (2); the quantitative box (3) is fixedly mounted on the accelerating pipe (5); the accelerating pipe (5) is fixedly mounted on the main housing (1); the aeration device (6) is fixedly mounted inside the main housing (1); the impeller (9) is fixedly connected to the inner ring of the connecting bearing (10) and is located at the upper end of the aeration device (6); the outer ring of the connecting bearing (10) is fixedly connected to the aeration device (6); the secondary filter device (7) is slidably mounted in the main housing (1); the water outlet pipe (8) is fixedly connected to the main housing (1) and is located on a side close to the secondary filter device (7); The quantitative device (4) comprises: a buoyancy ball (401), an active rod (402), a connecting rod (403), a driven rod (404), a connecting rod cover (405), a water plug (406) and a support frame (407); the buoyancy ball (401) is fixedly mounted on one end of the active rod (402), the other end of the active rod (402) is rotatably connected to one end of the connecting rod (403), and the middle part is rotatably connected to the quantitative box (3); the other end of the connecting rod (403) is connected to the driven rod (404) is fixedly connected at one end; the other end of the driven rod (404) is fixedly mounted with a top seat, the middle of which is rotatably mounted on the quantitative box (3) and is located at the lower end of the active rod (402); the support frame (407) is fixedly mounted on the water outlet at the lower end of the quantitative box (3); the water plug (406) is slidably mounted on the support frame (407); the connecting rod cover (405) is fixedly mounted on the quantitative box (3) and is located at one end of the connecting rod (403); The interior of the acceleration pipe (5) is a Laval pipe structure, and an air inlet pipe (501) is also provided in the internal secondary cavity for aerobic bacteria to supplement oxygen; The aeration device (6) comprises: a nozzle (601), an aeration body (602), an aeration base (603), an air pump (604), and a connecting pipe (605); the aeration body (602) is fixedly mounted on the aeration base (603); the aeration base (603) is fixedly mounted inside the main housing (1); there are a plurality of nozzles (601) which are respectively fixedly mounted on the side of the aeration body (602); one end of the connecting pipe (605) is connected to the air pump (604), and the other end is fixedly connected to the aeration body (602); the air pump (604) is correspondingly mounted on a side of the main housing (1) close to the aeration device (6); the gap between the aeration body (602) and the main housing (1) is filled with a lightweight material for the biofilm attachment of aerobic bacteria.

2. A rural sewage multi-stage biological treatment device according to claim 1, characterized in that: The secondary filtering device (7) comprises: a filtering box (701), a filter screen (702) and a partition (703); the partition (703) is fixedly installed inside the filtering box (701) and is located in the middle; at least two groups of the filter screen (702) are slidably installed inside the filtering box (701) and are located on both sides of the partition (703); and the space between the filter screen (702) and the partition (703) is filled with a light material for the biofilm attachment of anaerobic bacteria.

3. A multi-stage biological treatment device for rural sewage according to claim 1, characterized in that: A control device is also included, the control device comprising: a temperature sensor, a controller and a human-machine interaction module; the temperature sensor, the controller and the human-machine interaction module are respectively fixedly installed inside the main box (1); the temperature sensor and the human-machine interaction module are respectively electrically connected to the controller.

4. A multi-stage biological treatment device for rural sewage according to claim 1, characterized in that: The main box body (1) is also provided with an exhaust pipe (101) located on one side of the aeration device (6) for exhausting waste gas.

5. A multi-stage biological treatment device for rural sewage according to claim 1, characterized in that: The water outlet pipe (8) has a plurality of water outlets arranged at different heights, and the water outlets are also provided with drain valves (801) for adjusting the liquid level inside the main box (1).

6. A rural sewage multi-stage biological treatment device according to any one of claims 1 to 5, characterized in that: The entire device is also covered with a cover, and an insulation layer is provided between the inner wall of the cover and the device body to prevent ice from forming in winter and affecting the treatment effect.

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