CN219363393U

CN219363393U - Septic tank with unpowered aeration

Info

Publication number: CN219363393U
Application number: CN202320390148.5U
Authority: CN
Inventors: 孙长贵; 姚中贵; 孙中一
Original assignee: Chengdu Sunriver Environment Technology Co ltd
Current assignee: Chengdu Sunriver Environment Technology Co ltd
Priority date: 2023-02-26
Filing date: 2023-02-26
Publication date: 2023-07-18
Anticipated expiration: 2033-02-26

Abstract

The utility model provides a septic tank with unpowered aeration, which comprises a three-grid septic tank, a waterfall aeration device and an unpowered air exhaust device. The sewage treatment device adopts a solar chimney (also called a black chimney or a black pipe) and an unpowered fan as unpowered air extraction devices, directly performs waterfall aeration on effluent water of a first grid of the three-grid septic tank by means of two natural resources of wind and light, and enables sewage to form an aerobic layer, an anoxic layer and an anaerobic layer from top to bottom in a second grid of the three-grid septic tank, thereby improving the sewage treatment effect of the septic tank. In order to avoid the heat dissipation of the black tube, a coaxial transparent tube can be sleeved outside the black tube. The septic tank with unpowered aeration can increase the treatment effect of the septic tank without increasing any running cost; the solar chimney and the unpowered fan are combined for air extraction, so that wind-solar compensation is realized, and the device has better universality. And is also practically equivalent to an unpowered sewage treatment device.

Description

Septic tank with unpowered aeration

Technical field:

a septic tank with unpowered aeration belongs to the field of sewage treatment.

Technical background:

the septic tank is a primary sewage treatment device which uses the principles of sedimentation and anaerobic fermentation to remove suspended matters in sewage in a dividing way and carry out primary sewage treatment on organic matters. Three-cell septic tanks are one of the highest uses. The water is discharged after passing through the first, second and third grids, and the partition board between each grid is provided with a communicating pipe from the lower part to the upper part. The three-cell tank can be named as a trapping sedimentation and fermentation tank (a first tank), a secondary fermentation tank (a second tank) and a sedimentation and excrement storage tank (a third tank) in sequence according to the main functions of the three-cell tank. The total hydraulic retention time is generally 24-28 hours.

Because the septic tank mainly performs sedimentation and anaerobic treatment and lacks the most important aeration function of sewage treatment, the sewage treatment is only primary sewage treatment, and the irrigation standard and the water quality requirement of the municipal sewage pipe network are generally not met.

The utility model comprises the following steps:

the utility model discloses a septic tank with unpowered aeration, which comprises a three-grid septic tank, a waterfall aeration device and a unpowered air extractor, and is characterized in that: the unpowered air extractor comprises a solar chimney air extractor and a unpowered fan arranged at the top of the solar chimney air extractor, the unpowered fan is arranged at the top of a second grid of the three-grid septic tank, and a waterfall aeration device is arranged at the top of a communicating pipe between the first grid and the second grid of the three-grid septic tank.

The solar chimney is also called a black chimney, commonly called a black pipe, is a black high-efficiency heat conduction pipe, and is commonly used as a black steel pipe or an externally-blackened steel pipe. When the solar chimney is irradiated by sunlight, the black color can well receive the sunlight and convert the sunlight into heat energy, and the high-efficiency heat conductivity of the solar chimney can effectively transfer the received heat energy to air in the solar chimney. When the air in the pipe is heated, the quality is reduced and the air rises, so that the air at the lower part of the solar chimney is driven to flow upwards, and the indoor air is automatically ventilated.

If the solar chimney is arranged at the top of the second grid of the three-grid septic tank, and the waterfall aeration device is arranged at the top of the communicating pipe between the first grid and the second grid, when the solar chimney receives sunlight to pump air upwards, the original exhaust pipe of the septic tank becomes the water inlet pipe, so that air circulation is formed, and the waterfall water flow is aerated. The aerated water flow continuously enters the surface layer of the second grid, and then is transferred into the third grid from the lower part of the second grid, and dissolved oxygen in the water flow is continuously consumed, so that the second grid of the septic tank is subjected to an aerobic, anoxic and anaerobic process from top to bottom. The mixed liquor reflux of an AAO method (anaerobic-anoxic-aerobic sewage sludge method) is actually realized in the aerobic-anoxic process, so that after the three-grid septic tank is matched with a solar chimney and a waterfall aeration device, the treatment effect of COD and BOD is improved, and the degradation of ammonia nitrogen, total nitrogen, animal fat, petroleum and anionic surfactant is facilitated. The hydraulic retention time of the second grid is long enough, the better the aeration effect is, the longer the process is, and the greater the treatment effect is.

Of course, the three-grid septic tank has limited height, the fall of the formed waterfall aeration is smaller, and the absorption rate of the waterfall aeration to oxidation is lower. In overcast and rainy days, the intensity and duration of sunlight are low, and the aeration effect is poorer.

In order to improve the aeration effect, a layer of coaxial transparent tube with high light transmittance can be added outside the black tube of the solar chimney, so that sunlight can well pass through and gather on the middle black tube, and meanwhile, heat energy on the black tube can be prevented from being dissipated through external air, thereby improving the air extraction effect of the solar chimney. The reinforced solar chimney is obvious in environments with larger wind power and lower air temperature.

An unpowered fan can also be arranged at the top of the solar chimney. The unpowered fan can automatically rotate under natural wind power to form upward air suction. After the unpowered fan is added, the air extraction effect can be better in places lacking sunlight and in areas with larger wind power in the period (such as at night).

No matter the solar chimney and the unpowered fan are adopted for air extraction, free natural resources are adopted for air extraction, so the utility model provides a unpowered aeration septic tank or a unpowered sewage processor; the solar chimney and the unpowered fan are combined for air extraction, so that wind-solar compensation is realized, and the solar energy-powered air-assisted solar energy system has better universality. The three-grid septic tank has the advantages that the aeration function is added, the aerobic layer, the anoxic layer and the mixed liquid reflux are generated, the COD and BOD treatment effect can be improved, and ammonia nitrogen and total nitrogen which are difficult to treat in the traditional septic tank can be treated. Of course, since the aeration height of the waterfall is limited, the aeration intensity is not high, the duration of sewage aeration is not long, and thus the aeration effect is not very large, and the increased treatment effect is not very large. However, because the aeration is unpowered, the operation cost of the three-grid septic tank is not increased, and the method is very beneficial to improving the quality of the effluent water for toilet improvement and sewage treatment in vast rural areas.

Description of the drawings:

fig. 1 is a schematic illustration of an embodiment of a septic tank with unpowered micro-aeration.

The specific embodiment is as follows:

as shown in fig. 1, the three-cell septic tank 1 is divided into three cells by a partition plate 3 and a partition plate 18, namely a first cell 2, a second cell 17 and a third cell 16, and each cell is provided with an access hole 7 and a corresponding access hole cover 8; the partition boards 3 and 18 are respectively provided with communicating pipes 4 and 15; the three-grid septic tank 1 is provided with a water inlet 5, a water outlet 14 and a vent pipe 11. The reinforced solar chimney with the unpowered fan 10 is fixedly arranged on the overhaul hole 7 at the top of the second grid 17 of the three-grid septic tank 1 and comprises a black pipe 8 and a transparent pipe 9 coaxially sleeved on the black pipe 8, wherein the black pipe 8 is an aluminum pipe with black paint coated on the surface; the waterfall aeration device 12 is installed at the top of the communicating pipe 4, and is a grid plate, so that sewage entering the second grid 18 through the communicating pipe 4 is dispersed into a plurality of water columns, the contact area between the sewage and air is increased, and the waterfall aeration effect is increased. In order to make the air flow path possible through the waterfall aeration device 12, an air duct 13 is installed at the bottom of the aeration pipe 11. In order to achieve waterfall aeration, it is necessary to make the top outlet height of the communicating pipe 4 higher than that of the communicating pipe 15. In order to increase the post-aeration water treatment effect, the volume of the second cells 17 of the three-cell septic tank 1 may be appropriately increased.

After entering the first grid 2 of the three-grid septic tank 1 through the water inlet 5, sewage is subjected to precipitation and hydrolysis, wherein lower water enters the second grid 17 through the communicating pipe 4 and the waterfall aeration device 12. When sunlight irradiates the black tube 9 through the transparent tube 9, the black tube 9 heats up, and the temperature thereof rises. The transparent tube 9 can prevent part of heat energy on the black tube 9 from being emitted outwards; the aluminum tube is a very good heat conductor, and the heat energy on the black tube 9 can be quickly conducted to the air in the aluminum tube and the temperature of the aluminum tube is raised; the air temperature is increased to lower the quality and increase the air quality, so that the air of the second grid 17 flows upwards; on the other hand, cooler air enters the second grid 17 from the vent pipe 11 and the air guide pipe 13 and flows upwards through the waterfall aeration device 12 to form aeration for waterfall water flow.

The aerated sewage gradually moves downwards in the second grid 17, and in the downward movement process, dissolved oxygen gradually descends due to sewage consumption, and an aerobic layer, an anoxic layer and an anaerobic layer are formed from top to bottom, so that the sewage treatment effect is improved.

The sewage at the lower layer in the second grid 17 enters the third grid 16 through the communicating pipe 15 for precipitation, and is discharged through the water outlet 14 after precipitation.

Claims

1. A septic tank with unpowered aeration comprises a three-grid septic tank, a waterfall aeration device and an unpowered air exhaust device, and is characterized in that: the unpowered air extractor comprises a solar chimney and a unpowered fan arranged at the top of the solar chimney, the unpowered fan is arranged at the top of a second grid of the three-grid septic tank, and the waterfall aeration device is arranged at the top of a communicating pipe between the first grid and the second grid of the three-grid septic tank.

2. A septic tank with unpowered aeration according to claim 1, characterized in that: at least one coaxial transparent tube is sleeved outside the black tube of the solar chimney.