Sewage treatment equipment

Abstract

The utility model discloses sewage treatment equipment, which relates to the technical field of sewage treatment and comprises a reactor main body as well as a water decanter, an aeration head and a liquid level sensor which are arranged in the reactor main body. An air source box is arranged at the top of the reactor main body, and an air pump is arranged in the air source box and used for supplying air to the aeration head; a filler layer is arranged at the lower part of the reactor main body, a vertically communicated central cylinder is arranged at the center of the filler layer, and the aeration head is suspended in the central cylinder. A density difference is generated inside and outside the central cylinder during aeration, so that sewage circularly flows through the filler layer, and dissolved oxygen is also provided for microorganisms attached to and growing on the filler layer along with flowing of the sewage, so that the sewage can be effectively purified.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a sewage treatment device. Background Art

[0002] Most of the sewage treatment devices for rural scattered households are buried purification tanks. After the sewage is treated by a septic tank, it is discharged to the buried sewage treatment device by gravity and then discharged after treatment. However, there are multiple problems with this kind of sewage treatment device:

[0003] First of all, the buried sewage treatment device occupies arable land, posing a challenge to the rational use of rural land resources. Secondly, since the device is buried underground, inspection and maintenance become very difficult. Especially when the device fails, it is often necessary to dig the soil, increasing the maintenance cost and workload.

[0004] With the popularization of sanitary ware in rural areas, the sewage discharge has increased significantly, and the water volume variation coefficient has also increased. This change results in unstable treatment effects of the buried sewage treatment device and it is difficult to ensure that the sewage meets the discharge standards after treatment. Especially during the peak period, the device often cannot effectively handle the suddenly increased sewage volume, resulting in a decline in treatment effects and further causing environmental pollution.

[0005] In addition, most current sewage treatment devices do not consider the problem of excess sludge discharge. The accumulation of sludge not only affects the normal operation of the device but may also cause secondary pollution. Therefore, it is urgent to improve the existing sewage treatment facilities and explore more efficient and environmentally friendly treatment solutions to ensure the effective treatment of rural sewage and protect the ecological environment. Summary of the Utility Model

[0006] To solve the deficiencies of the prior art, the utility model provides a sewage treatment device with high integration, no need for burial, and capable of stably purifying sewage.

[0007] To achieve the purpose of the utility model, the following scheme is proposed:

[0008] A sewage treatment device includes a reactor main body and a water decanter, an aeration head, and a liquid level sensor disposed therein.

[0009] The liquid level sensor is used to detect the liquid level in the reactor main body;

[0010] A gas source box is provided at the top of the reactor main body, and an air pump is provided inside the gas source box for supplying gas to the aeration head;

[0011] A packing layer is arranged at the lower part of the reactor main body, a central cylinder communicating up and down is arranged in the center of the packing layer, and the aeration head is suspended in the central cylinder;

[0012] The water decanter is used for draining water.

[0013] Further, the aeration head is cylindrical.

[0014] Further, the reactor main body is cylindrical.

[0015] Further, the aeration head is located at the middle position of the central cylinder.

[0016] Further, from top to bottom, the filler layer is successively distributed with aerobic bacteria, facultative aerobic bacteria, and anaerobic bacteria.

[0017] Further, a sludge discharge pipe is also provided in the reactor main body. The sludge discharge pipe is connected with an air-lift sludge discharge pump for discharging sludge. A preset space is provided between the bottom surface of the filler layer and the inner bottom surface of the reactor main body, and the bottom of the sludge discharge pipe extends into this space.

[0018] Further, the water decanter includes a U-shaped pipe, an overflow pipe, a water decanting structure, and a drain pipe. The top of one branch section of the U-shaped pipe is simultaneously connected to the overflow pipe and the drain pipe. The overflow pipe is vertically arranged. A solenoid valve is provided at the top of the other branch section of the U-shaped pipe. The water decanting structure includes a horizontal main pipe and a plurality of branch pipes with lower openings provided vertically at the bottom of the main pipe. The main pipe is connected to the other branch section of the U-shaped pipe, and the bottom surface of the branch pipes is higher than the drain pipe and the filler layer.

[0019] Further, the water decanter includes a U-shaped pipe, an overflow pipe, a water decanting structure, and a drain pipe. The top of one branch section of the U-shaped pipe is simultaneously connected to the overflow pipe and the drain pipe. The overflow pipe is vertically arranged. The water decanting structure includes an annular gap drainage channel and a conical surface confluence chamber provided at its top. The other branch section of the U-shaped pipe is connected to the top of the conical surface confluence chamber. A ventilation pipe is provided at the top of the conical surface confluence chamber. A solenoid valve is provided at the top of the ventilation pipe. The bottom surface of the annular gap drainage channel is higher than the drain pipe and the filler layer.

[0020] The beneficial effect of the present utility model is that: when aerating, a density difference is generated inside and outside the central cylinder, so that the sewage circulates through the filler layer. Dissolved oxygen is also provided to the microorganisms attached and growing on the filler layer along with the flow of the sewage. The sewage realizes aerobic, facultative aerobic, and anaerobic biochemical processes respectively during the flowing process and is purified. Description of the Drawings

[0021] Figure 1 Shows a schematic internal view of the sewage treatment equipment;

[0022] Figure 2 Shows a horizontal sectional view of the filler layer;

[0023] Figure 3 Shows a schematic view of the sludge discharge pipe;

[0024] Figure 4 Shows a schematic view of the water decanter in Embodiment 1;

[0025] Figure 5 Shows a schematic view of the water decanter in Embodiment 2. Detailed implementation manners

[0026] Example 1

[0027] As Figures 1 - 4 shown, this example provides a sewage treatment device, which includes a reactor main body 1 and a water decanter 2, a sludge discharge pipe 3, an aeration head 4, and a liquid level sensor 5 arranged in the reactor main body 1.

[0028] The water inlet of this device is in a batch mode. In each cycle, water is inlet to the highest liquid level, that is, the liquid level during the biochemical reaction. After each biochemical reaction is completed, the water is drained to the lowest liquid level. The liquid level sensor 5 is suspended in the reactor main body 1 and is used to detect the highest liquid level and the lowest liquid level in the reactor main body 11, and the position of the liquid level sensor 5 is lower than the lowest liquid level.

[0029] A gas source box 11 is arranged at the top of the reactor main body 1. An air pump is arranged inside the gas source box 11 to supply gas to the aeration head 4. The reactor main body 1 is cylindrical. A packing layer 12 is arranged at the lower part of the reactor main body 1. From top to bottom, aerobic bacteria, facultative aerobic bacteria, and anaerobic bacteria are distributed in the packing layer 12 in sequence, which plays a purification role. A central cylinder 13 communicating up and down is arranged at the center of the packing layer 12. The aeration head 4 is suspended in the central cylinder 13. More precisely, the aeration head 4 is cylindrical and is located at the middle position of the central cylinder 13.

[0030] A preset space is provided between the bottom surface of the packing layer 12 and the inner bottom surface of the reactor main body 1. The bottom of the sludge discharge pipe 3 extends into this space. The sludge discharge pipe 3 is connected with an air-lift sludge discharge pump, and the air-lift sludge discharge pump is arranged in the gas source box 11 and is used to discharge the sludge in the reactor main body 1.

[0031] The water decanter 2 includes a U-shaped pipe 21, an overflow pipe 22, a water decanting structure, and a drain pipe 24. The top of one branch section of the U-shaped pipe 21 is simultaneously communicated with the overflow pipe 22 and the drain pipe 24. The overflow pipe 22 is vertically arranged, and its top surface is higher than the highest liquid level. The drain pipe 24 is horizontally arranged and passes through the side wall of the reactor main body 1. An electromagnetic valve is arranged at the top of the other branch section of the U-shaped pipe 21. The water decanting structure includes a main pipe 231 and a plurality of branch pipes 232 with lower openings. The main pipe 231 is horizontally arranged and is communicated with the other branch section of the U-shaped pipe 21. The main pipe 231 is lower than the highest liquid level. A plurality of branch pipes 232 are vertically arranged at the bottom of the main pipe 231, and the bottom surface of the branch pipe 232 is higher than the drain pipe 24, and the bottom surface of the branch pipe 232 is also higher than the packing layer 12.

[0032] A complete water treatment cycle of this device is respectively: water inlet, aeration, sedimentation, and water drainage.

[0033] Water inlet: The solenoid valve is closed, and the sewage to be treated is injected into the reactor main body 1, and the sewage liquid level rises from the lowest liquid level to the highest liquid level; before this water injection, there is liquid in the U-shaped tube 21. Therefore, during this water injection process, due to the closed solenoid valve, the liquid in the U-shaped tube 21 plays a steam seal role, forming a steam seal space. As the liquid level in the reactor main body 1 continuously rises, under the static pressure of water, the liquid levels in the multiple branch pipes 232 rise. Due to the extrusion of the air in the sealed space, the liquid levels at both ends of the U-shaped tube 21 change. The liquid level of the other branch section of the U-shaped tube 21 drops, and the liquid level of one branch section of the U-shaped tube 21 rises. The excess water in the U-shaped tube 21 flows away along the drain pipe 24 until the liquid level difference in the U-shaped tube 21 is balanced. After that, the water in the reactor main body 1 will not continue to flow into the branch pipes 232;

[0034] Aeration: The solenoid valve remains closed, and the aeration head 4 starts to aerate. During aeration, a density difference is generated inside and outside the central cylinder 13, causing the sewage to flow from the upper part of the packing layer 12 through the packing layer 12 to the lower part of the packing layer 12, and finally being lifted through the central cylinder 13, circulating repeatedly. Dissolved oxygen is also provided to the microorganisms attached and growing on the packing layer 12 along with the flow of the sewage. During the flow of the sewage, aerobic, facultative aerobic, and anaerobic biochemical processes are respectively realized, and the sewage is purified;

[0035] Sedimentation: The solenoid valve continues to remain closed, and the sludge begins to sink. After the sedimentation time ends, the supernatant is in the upper part of the reactor main body 1, and the sludge precipitates at the bottom of the reactor main body 1; the air-lift sludge discharge pump is started regularly to discharge the excess sludge, and note that the sludge discharge is carried out before the water discharge;

[0036] Water discharge: The solenoid valve is opened, and the supernatant immediately flows through the multiple branch pipes 232 to the main pipe 231 and the U-shaped tube 21 in sequence. When liquid flows out of the drain pipe 24, the solenoid valve is closed, and the supernatant continues to flow through the multiple branch pipes 232 to the main pipe 231, the U-shaped tube 21, and the drain pipe 24; when the liquid level drops to the main pipe 231, the solenoid valve is opened until the liquid level drops to the lowest liquid level.

[0037] Embodiment 2

[0038] As Figures 1 - 3 、 Figure 5 shown, the solution of this embodiment is basically the same as that of Embodiment 1, the difference being that this embodiment selects another kind of decanter 2, as Figure 5As shown in the figure, the water decanter 2 includes a U-shaped pipe 21, an overflow pipe 22, a water decanting structure, and a drain pipe 24. The top of one branch section of the U-shaped pipe 21 is connected to both the overflow pipe 22 and the drain pipe 24 at the same time. The overflow pipe 22 is vertically arranged, and its top surface is higher than the highest liquid level. The drain pipe 24 is horizontally arranged and passes through the side wall of the reactor main body 1. The water decanting structure includes an annular gap drainage channel 233 and a conical surface confluence chamber 234 provided at its top. The annular gap drainage channel 233 includes an inner cylinder and an outer cylinder. The inner cylinder and the outer cylinder form an annular drainage space. A plurality of support bars are arranged between the inner cylinder and the outer cylinder. The conical surface confluence chamber 234 includes a circular confluence weir and a conical structure located at the top of the circular confluence weir. The periphery of the circular confluence weir is connected to the inner cylinder, and the bottom of the conical structure is connected to the outer cylinder. The top of the other branch section of the U-shaped pipe 21 is connected to the conical surface confluence chamber 234 from the center of the circular confluence weir. A vent pipe 25 is provided at the top of the conical surface confluence chamber 234, and a solenoid valve is provided at the top of the vent pipe 25. The bottom surface of the annular gap drainage channel 233 is higher than the drain pipe 24 and the packing layer 12.

[0039] A complete water treatment cycle of this equipment is respectively: water inlet, aeration, sedimentation, and drainage.

[0040] Water inlet: The solenoid valve is closed, and the sewage to be treated is injected into the reactor main body 1. The sewage liquid level rises from the lowest liquid level to the highest liquid level. Before this water injection, there is liquid in the U-shaped pipe 21. Therefore, during this water injection process, due to the closed solenoid valve, the liquid in the U-shaped pipe 21 plays a role of steam seal, forming a steam seal space. As the liquid level in the reactor main body 1 continuously rises, under the static pressure of water, the liquid level in the annular gap drainage channel 233 rises. Due to the extrusion of the air in the sealed space, the liquid levels at both ends of the U-shaped pipe 21 change. The liquid level of the other branch section of the U-shaped pipe 21 drops, and the liquid level of one branch section of the U-shaped pipe 21 rises. The excess water in the U-shaped pipe 21 flows away along the drain pipe 24 until the liquid level difference in the U-shaped pipe 21 is balanced. After that, the water in the reactor main body 1 will not continue to flow into the annular gap drainage channel 233.

[0041] Aeration: The solenoid valve remains closed, and the aeration head 4 starts aeration. When aerating, a density difference is generated inside and outside the central cylinder 13, causing the sewage to flow from the upper part of the packing layer 12 through the packing layer 12 to the lower part of the packing layer 12, and finally being lifted through the central cylinder 13, repeating in a cycle. The dissolved oxygen is also provided to the microorganisms attached and growing on the packing layer 12 along with the flow of the sewage. The sewage realizes aerobic, facultative aerobic, and anaerobic biochemical processes respectively during the flowing process and is purified.

[0042] Sedimentation: The solenoid valve continues to remain closed, and the sludge begins to sink. After the sedimentation time ends, the supernatant is in the upper part of the reactor main body 1, and the sludge precipitates at the bottom of the reactor main body 1. The air-lift sludge discharge pump is started regularly to discharge the surplus sludge.

[0043] Drainage: When the solenoid valve opens, the supernatant immediately flows through the annular gap drainage channel 233 to the conical surface confluence chamber 234 and the U-shaped pipe 21 in sequence. When liquid flows out of the drain pipe 24, the solenoid valve closes, and the supernatant continues to flow through the annular gap drainage channel 233 to the conical surface confluence chamber 234, the U-shaped pipe 21 and the drain pipe 24. When the liquid level drops to the annular gap drainage channel 233, the solenoid valve opens until the liquid level drops to the lowest liquid level.

[0044] The above embodiments are only used to illustrate the technical idea and characteristics of the present invention, and do not represent the only or limit the present invention. Those skilled in the art should understand that various changes or equivalent replacements made to the present invention without departing from the scope of the present invention all fall within the scope of protection of the present invention.

Claims

1. A sewage treatment device, characterized in that, It includes a reactor main body (1) and a water decanter (2), an aeration head (4), and a liquid level sensor (5) disposed therein; The liquid level sensor (5) is used to detect the liquid level in the reactor main body (1); A gas source box (11) is provided at the top of the reactor main body (1), and an air pump is provided inside the gas source box (11) to supply air to the aeration head (4); A packing layer (12) is arranged at the lower part of the reactor main body (1), a central cylinder (13) communicating up and down is arranged at the center of the packing layer (12), and the aeration head (4) is suspended in the central cylinder (13); The water decanter (2) is used for draining water.

2. The sewage treatment equipment according to claim 1, characterized in that The aeration head (4) is cylindrical.

3. The sewage treatment equipment according to claim 1, characterized in that, The reactor main body (1) is cylindrical.

4. The sewage treatment equipment according to claim 1, characterized in that, The aeration head (4) is located at the middle position of the central cylinder (13).

5. The sewage treatment equipment according to claim 1, characterized in that, From top to bottom, the packing layer (12) is sequentially distributed with aerobic bacteria, facultative aerobic bacteria, and anaerobic bacteria.

6. The sewage treatment equipment according to claim 1, characterized in that, A sludge discharge pipe (3) is further provided in the reactor main body (1), and the sludge discharge pipe (3) is connected with an air-lift sludge discharge pump for discharging surplus sludge. A preset space is provided between the bottom surface of the packing layer (12) and the inner bottom surface of the reactor main body (1), and the bottom of the sludge discharge pipe (3) extends into this space.

7. The sewage treatment equipment according to claim 1, characterized in that, The water decanter (2) includes a U-shaped pipe (21), an overflow pipe (22), a water decanting structure, and a drain pipe (24). The top of one section of the U-shaped pipe (21) is simultaneously connected to the overflow pipe (22) and the drain pipe (24). The overflow pipe (22) is vertically arranged, and a solenoid valve is provided at the top of the other section of the U-shaped pipe (21). The water decanting structure includes a horizontal main pipe (231) and a plurality of branch pipes (232) with lower openings vertically arranged at the bottom of the main pipe (231). The main pipe (231) is connected to the other section of the U-shaped pipe (21), and the bottom surface of the branch pipe (232) is higher than the drain pipe (24) and the packing layer (12).

8. The sewage treatment equipment according to claim 1, characterized in that, The water decanter (2) includes a U-shaped pipe (21), an overflow pipe (22), a water decanting structure, and a drain pipe (24). The top of one section of the U-shaped pipe (21) is simultaneously connected to the overflow pipe (22) and the drain pipe (24). The overflow pipe (22) is vertically arranged. The water decanting structure includes an annular gap drainage channel (233) and a conical surface confluence chamber (234) provided at its top. The other section of the U-shaped pipe (21) is connected to the top of the conical surface confluence chamber (234). A ventilation pipe (25) is provided at the top of the conical surface confluence chamber (234), and a solenoid valve is provided at the top of the ventilation pipe (25). The bottom surface of the annular gap drainage channel (233) is higher than the drain pipe (24) and the packing layer (12).

Images