Sewage treatment device

Abstract

The utility model relates to a sewage treatment device. The sewage treatment device comprises a shell, a main pipeline and an aeration device, an inner cavity is formed in the shell, and a water outlet communicated with the outside is formed in the upper portion of the shell. The main pipeline is arranged in the inner cavity, a first cavity is defined, and the part, located outside the main pipeline, of the inner cavity is marked as a second cavity; a communicating opening for communicating the first chamber with the second chamber is formed in the bottom of the main pipeline; a water inlet for inputting sewage into the first chamber is formed in the upper part of the main pipeline; the aeration device is arranged in a position, lower than the water inlet, in the first cavity and performs aeration from bottom to top so as to form upwelling in the first cavity; a scum discharge pipe communicated with the outside is arranged at the upper part of the main pipeline, and scum in the sewage is discharged through the scum discharge pipe under the action of upward flow. According to the sewage treatment device, the whole flow of sewage treatment is integrated in the same device, so that the treatment efficiency is improved, the occupied space is saved, and the energy consumption is reduced.

Description

Technical Field

[0001] This disclosure relates to the field of wastewater treatment technology, and specifically to a wastewater treatment device. Background Technology

[0002] In wastewater treatment processes, coagulation and sedimentation are common methods for removing suspended particles and colloidal substances from wastewater. Coagulation involves adding flocculants to form larger flocs from suspended particles and colloidal substances in the water, while sedimentation utilizes gravity to separate these flocs from the water. To achieve these functions, a separate process is typically used, where the coagulation reaction tank and sedimentation tank are set up independently. The coagulation tank is used for the flocculation reaction, while the sedimentation tank is specifically responsible for the gravity settling of the flocs.

[0003] The separate process has many drawbacks: the separate coagulation and sedimentation tanks occupy too much land, the system is complex, making operation and maintenance difficult, the treatment efficiency is low, and the energy consumption is high. To address these issues, vertical flow sedimentation tanks have been introduced in existing technologies. These tanks have a relatively small footprint and can achieve efficient separation of flocs and impurities through a vertical water flow sedimentation process. However, vertical flow sedimentation tanks still face pressing technical challenges, such as difficulty in removing fine suspended particles, incomplete scum removal, and significant water flow disturbance. Utility Model Content

[0004] This disclosure provides a wastewater treatment device to address the problems existing in the prior art.

[0005] According to a first aspect of this disclosure, a wastewater treatment apparatus is provided, comprising:

[0006] The housing has an inner cavity, and an outlet communicating with the outside is provided at the upper part of the housing;

[0007] A main pipe is disposed within the inner cavity and is configured to enclose and form a first chamber. The portion of the inner cavity located outside the main pipe is referred to as the second chamber. A communication port for connecting the first chamber and the second chamber is provided at the bottom of the main pipe. An inlet for inputting sewage into the first chamber is provided at the upper part of the main pipe.

[0008] An aeration device is installed in the first chamber at a position lower than the inlet and is configured to aerate from bottom to top to form an upward flow in the first chamber; a scum discharge pipe connected to the outside is provided at the upper part of the main pipe, and scum in the sewage is configured to be discharged through the scum discharge pipe under the action of the upward flow.

[0009] In one embodiment of this disclosure, a dosing device is further included. The dosing device is disposed in the first chamber at a position lower than the aeration device and is configured to deliver chemicals to the wastewater. A sedimentation zone is provided at the bottom of the second chamber. A sludge discharge pipe communicating with the outside is provided on the shell. The sludge discharge pipe is configured to extend to the sedimentation zone, and the precipitate generated by the reaction of wastewater and chemicals is configured to be discharged through the sludge discharge pipe.

[0010] In one embodiment of this disclosure, a fluid mixer is further included, which is disposed in the first chamber at a position lower than the dosing device, and the wastewater is configured to be uniformly mixed with the agent under the action of the fluid mixer.

[0011] In one embodiment of this disclosure, the fluid mixer is a static mixer configured to form a spiral flow channel extending along the axis of the main pipe within the first chamber.

[0012] In one embodiment of this disclosure, the main pipeline includes a first pipe section and a second pipe section arranged from top to bottom, the fluid mixer is disposed in the first pipe section, and the connecting port is disposed at the bottom of the second pipe section; the flow cross-sectional area of ​​the second pipe section is configured to gradually increase from top to bottom.

[0013] In one embodiment of this disclosure, the main pipeline further includes a third pipe section, which is configured to be higher than the inlet, and the scum discharge pipe is disposed on the third pipe section; the flow cross-sectional area of ​​the third pipe section is configured to be smaller than the flow cross-sectional area of ​​the first pipe section.

[0014] In one embodiment of this disclosure, a plurality of flow stabilizing plates are disposed in the second chamber at a position higher than the sedimentation zone and lower than the outlet, and the plurality of flow stabilizing plates are arranged at intervals around the main pipe; one end of the flow stabilizing plate is fixedly disposed on the outer wall of the main pipe, and the other end is configured to extend toward the housing along the radial direction of the main pipe.

[0015] In one embodiment of this disclosure, multiple flow stabilizers divide the second chamber into multiple liquid storage areas; the flow stabilizers are provided with multiple through holes to connect adjacent liquid storage areas.

[0016] In one embodiment of this disclosure, the dosage concentration of the agent delivered to the wastewater by the dosing device is 10-50 mg / L.

[0017] In one embodiment of this disclosure, a guide plate is provided below the main pipe, the guide plate being configured to extend obliquely downward or horizontally; the liquid flow in the first chamber is configured to flow downward to the guide plate and to flow into the second chamber along the extension direction of the guide plate.

[0018] In one embodiment of this disclosure, the guide plate is configured to be fixedly connected to the bottom of the main pipe by multiple connecting ribs; the multiple connecting ribs are configured to form multiple communication openings together with the guide plate and the main pipe.

[0019] In one embodiment of this disclosure, the top of the main pipeline is provided with a vent that communicates with the outside; the connection point between the scum discharge pipe and the main pipeline is configured to be higher than the water outlet.

[0020] In one embodiment of this disclosure, an overflow weir is further included, which is disposed around the upper part of the second chamber in a circumferential direction; the top of the overflow weir is provided with a plurality of overflow notches at intervals.

[0021] In one embodiment of this disclosure, the diameter of the bubbles formed by the aeration device ranges from 50 to 100 μm; the air volume of the aeration device is 1% to 3% of the sewage influent flow rate.

[0022] In one embodiment of this disclosure, the diameter of the housing is configured to be less than or equal to 3m.

[0023] One beneficial effect of this disclosure is that the internal cavity is functionally divided by setting up a main pipeline. Wastewater is transported into the first chamber located inside the main pipeline through the inlet, where it undergoes preliminary purification. Under the influence of gravity, the wastewater flows downwards and enters the second chamber through the connecting port at the bottom of the main pipeline, where it undergoes further sedimentation. The treated clean water finally flows out from the outlet located at the top of the shell, thus achieving wastewater purification. It is evident that the wastewater treatment device provided by this disclosure achieves an integrated design, concentrating the entire wastewater treatment process within a single device, thereby improving treatment efficiency, saving space, and reducing energy consumption. Furthermore, the upward flow generated by the aeration device can disturb the scum in the wastewater, causing it to rise quickly and be collected in the scum discharge pipe, thus preventing the scum from affecting water quality.

[0024] Other features and advantages of this disclosure will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0025] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments of the present disclosure and, together with their description, serve to explain the principles of the present disclosure.

[0026] Figure 1 This is a cross-sectional view of a wastewater treatment apparatus according to an embodiment of this disclosure;

[0027] Figure 2 yes Figure 1 A magnified view of the upper part;

[0028] Figure 3 This is a schematic diagram of the structure of a wastewater treatment device according to an embodiment of the present disclosure;

[0029] Figure 4 This is a schematic diagram of the wastewater treatment device from another angle in one embodiment of this disclosure;

[0030] Figure 5 This is a schematic diagram of the internal structure of a wastewater treatment device according to an embodiment of this disclosure;

[0031] Figure 6 This is a schematic diagram of the structure of a static mixer in one embodiment of the present disclosure.

[0032] Figures 1 to 6 The one-to-one correspondence between the component names and the reference numerals in the figures is as follows:

[0033] 1. Shell; 11. Outlet; 12. Overflow weir; 121. Overflow notch; 122. Overflow trough; 2. Main pipe; 21. First pipe section; 22. Second pipe section; 23. Third pipe section; 24. Guide plate; 25. Connecting rib; 26. Connecting port; 27. Air vent; 3. Inlet pipe; 31. Inlet; 4. Aeration device; 41. Aeration disc; 5. Scum discharge pipe; 51. Scum outlet; 6. Dosing device; 7. Sludge discharge pipe; 8. Stabilizer; 81. Spiral flow channel; 9. Flow stabilizer; 91. Through hole; 10. First chamber; 20. Second chamber; 201. Sedimentation zone; 202. Liquid storage zone. Detailed Implementation

[0034] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present disclosure.

[0035] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this disclosure or its application or use.

[0036] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0037] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0038] In this article, terms such as "up," "down," "front," "back," "left," and "right" are used only to indicate the relative positional relationship between related parts, rather than to define the absolute position of these related parts.

[0039] In this article, "first," "second," etc., are used only to distinguish one another, and not to indicate degree of importance, order, or prerequisite for each other.

[0040] In this document, terms such as “equal” and “same” are not strict mathematical and / or geometric limitations, but also include errors that are understandable to those skilled in the art and permissible in manufacturing or use.

[0041] refer to Figure 1 , Figure 3 and Figure 4 This disclosure provides a wastewater treatment device, which includes a shell 1, a main pipeline 2, and an aeration device 4. The shell 1 has an inner cavity for temporarily storing liquid and for housing the various components of the wastewater treatment device. Figure 1 As shown, the main pipe 2 is disposed in the inner cavity and is constructed to enclose and form a first chamber 10. The part of the inner cavity located outside the main pipe 2 is referred to as the second chamber 20. The first chamber 10 and the second chamber 20 are interconnected. Specifically, the bottom of the main pipe 2 is provided with a connecting port 26 for connecting the first chamber 10 and the second chamber 20.

[0042] like Figure 3 As shown, in one specific embodiment of this disclosure, the main pipe 2 can be vertically positioned at the center of the inner cavity, meaning the main pipe 2 and the housing 1 can have the same central axis. In other embodiments, the main pipe 2 can also be located at other positions within the inner cavity; centrally positioning it is merely a preferred embodiment, and this disclosure does not impose specific limitations on it.

[0043] refer to Figure 1 and Figure 2 An inlet 31 for feeding sewage into the first chamber 10 is provided at the upper part of the main pipe 2. Specifically, an inlet pipe 3 is fixedly installed through the shell 1 and the main pipe 2. One end of the inlet pipe 3 is connected to the outside, and the other end passes through the shell 1 and the main pipe 2, thus forming an inlet 31 in the first chamber 10 inside the main pipe 2, allowing external sewage to be transported into the first chamber 10. The sewage flows downward in the first chamber 10 under the action of gravity and undergoes preliminary purification during the downward flow. After flowing to the bottom of the main pipe 2, the sewage can enter the second chamber 20 through the connecting port 26 at the bottom of the main pipe 2.

[0044] The preliminary purification treatment within the first chamber 10 may include removing scum from the wastewater. Specifically, refer to... Figure 1 and Figure 2The aeration device 4 is positioned within the first chamber 10 below the inlet 31 and is configured to aerate from bottom to top, creating an upward flow within the first chamber 10. In a specific embodiment of this disclosure, the aeration device 4 is a microporous aeration device, which can promote the floating of scum by releasing tiny bubbles. The microporous aeration device includes an aeration disc 41 located within the first chamber 10 below the inlet 31, and an aeration pipe connected at one end to the aeration disc 41 and at the other end through the main pipe 2 and the housing 1 to connect to an external air source. The aeration pipe can supply gas to the aeration disc 41, which aerates upward, thereby continuously creating an upward flow in the influent at the inlet 31. The upward flow generated by the aeration device 4 can agitate the scum in the wastewater, causing it to float rapidly and accumulate near the top of the first chamber 10.

[0045] In one embodiment of this disclosure, the diameter of the bubbles generated by the aeration device 4 ranges from 50 to 100 μm, and the air volume of the aeration device 4 is 1% to 3% of the sewage influent flow rate. This ensures efficient floating of scum while preventing excessive aeration to avoid disturbing the sewage.

[0046] It should be noted that this disclosure does not limit the specific type of aeration device 4. Besides microporous aeration equipment, aeration device 4 can also be mechanical aeration equipment, air flotation system, etc. Mechanical aeration equipment mixes air into the water through stirring blades, offering advantages such as simple structure and convenient maintenance. However, it also suffers from drawbacks such as larger bubbles and slightly lower scum removal efficiency, making it more suitable for low to medium flow rates. Air flotation systems, on the other hand, utilize high-pressure dissolved air to release a large number of microbubbles, resulting in a more significant separation effect on scum and fine particles. They are more suitable for water treatment with high concentrations of suspended solids, but their complexity and operating costs are relatively high. In this embodiment, microporous aeration equipment is preferably used as the aeration device 4.

[0047] refer to Figures 1 to 4 A scum discharge pipe 5, connected to the outside, is installed at the upper part of the main pipeline 2. Scum in the sewage is discharged through the scum discharge pipe 5 under the action of the upward flow, thus preventing scum from affecting water quality. One end of the scum discharge pipe 5 is connected to the main pipeline 2, such as... Figure 2 As shown, the connection point is designated as scum outlet 51. Scum in the wastewater rises to scum outlet 51 under the upward flow generated by aeration, and thus enters the scum discharge pipe 5. The other end of the scum discharge pipe 5 extends outside the shell 1 for external scum discharge. The scum discharge pipe 5 can be inclined, with scum outlet 51 at its highest position, allowing the scum inside the scum discharge pipe 5 to flow naturally along the scum discharge pipe 5 under gravity to the wastewater treatment device.

[0048] This disclosure achieves efficient separation and discharge of scum by combining an aeration device 4 with a scum discharge pipe 5. The aeration device 4 releases fine bubbles, disturbing the water flow and causing scum to float upwards and concentrate at the surface. During this process, the bubbles and scum rise together, and the scum is guided to the top scum discharge pipe 5 for collection and discharge, thus avoiding the impact of scum on the quality of the clean water. Compared with traditional mechanical agitators, microporous aeration is not only more energy efficient but also reduces the use of mechanical equipment, lowering energy consumption and maintenance costs.

[0049] The preliminary purification treatment within the first chamber 10 may further include flocculation and / or coagulation. In one embodiment of this disclosure, reference is made to... Figure 1 and Figure 2 The wastewater treatment device also includes a dosing device 6, which is located within the first chamber 10 below the aeration device 4 and is configured to deliver chemicals to the wastewater. These chemicals may include flocculants and / or coagulants. Coagulants are typically classified as inorganic coagulants (such as aluminum salts and iron salts) and organic coagulants (such as polyacrylamide); flocculants are typically classified as inorganic flocculants (such as polyaluminum ferric chloride) and organic flocculants (such as polyacrylamide). The dosing device 6 is located below the aeration device 4, thereby enabling coagulation and flocculation reactions to occur after the removal of scum from the wastewater.

[0050] In one specific embodiment of this disclosure, the dosing device 6 delivers a dosage concentration of 10-50 mg / L of the agent to the wastewater. A metering pump can be installed on the pipeline of the dosing device 6, thereby enabling precise dosing of the agent. The specific dosage of the agent can be dynamically adjusted according to the concentration of suspended solids in the wastewater and the influent flow rate, thereby ensuring the best coagulation and flocculation reaction effect.

[0051] Furthermore, in one embodiment of this disclosure, the wastewater treatment apparatus further includes a fluid mixer disposed within the first chamber 10 at a position lower than the dosing device 6. The wastewater is configured to be uniformly mixed with the chemicals under the action of the fluid mixer. Fine particles in the wastewater can be fully mixed with the coagulant and / or flocculant within the fluid mixer, thereby fully reacting to form flocs, optimizing the mixing effect, and improving the utilization rate of the chemicals.

[0052] In one specific implementation, refer to Figure 1 and Figure 6The fluid mixer is a static mixer 8, which is constructed to form a spiral flow channel 81 extending along the axis of the main pipe 2 within the first chamber 10. The static mixer 8 optimizes the mixing effect of water flow and flocculant through its internal structure. This disclosure solves the problem of uneven flocculant distribution by using the static mixer 8, avoiding floc breakage that may occur due to mechanical stirring. After the flocculant is precisely added through the dosing device 6, it flows along the spiral flow channel 81 with the wastewater, undergoing multiple processes such as splitting, shearing, and reflux within the static mixer 8, thus fully contacting the suspended particles in the wastewater to form stable large flocs. Compared to the low mixing efficiency caused by the separation of the flocculation tank and sedimentation tank in traditional split-type processes, this disclosure significantly improves the reaction efficiency of the flocculant while reducing reagent waste and operating costs. This disclosure uses a static mixer 8, thereby achieving efficient mixing through the natural shearing and reflux of the water flow, requiring no additional power and significantly reducing energy consumption.

[0053] It should be noted that this disclosure does not limit the specific type of fluid mixer. Besides the static mixer 8, the fluid mixer can also be a dynamic mixer, a multi-channel mixing pipe, etc. Dynamic mixers achieve efficient mixing through mechanical agitation, suitable for high-flow-rate and high-viscosity water, but the agitation equipment increases energy consumption and may damage flocs. Multi-channel mixing pipes achieve uniform distribution of flocculants through natural flow and cross-channels, requiring no additional power, making them energy-saving and environmentally friendly, but the mixing effect requires higher flow rate and pressure, making them suitable for low-flow-rate scenarios. In this embodiment, a static mixer 8 can be preferably used as the fluid mixer.

[0054] A sedimentation zone 201 is located at the bottom of the second chamber 20. A sludge discharge pipe 7, connected to the outside, is installed on the shell 1. The sludge discharge pipe 7 is configured to extend to the sedimentation zone 201, and the precipitate generated by the reaction of wastewater and chemicals is discharged through the sludge discharge pipe 7. Specifically, the liquid in the first chamber 10 enters the second chamber 20 through the connecting port 26 and settles in the second chamber 20. Under the action of gravity, flocs and particulate matter in the wastewater will fall into the sedimentation zone 201 at the bottom of the second chamber 20 to form sludge. The sludge is periodically discharged through the sludge discharge pipe 7. A sludge discharge pump can be installed on the sludge discharge pipe 7 to pump the settled sludge out against gravity. The specific sludge discharge volume and rate can be monitored by an automatic control device to avoid excessive accumulation or blockage of the sludge discharge pipe 7.

[0055] refer to Figures 1 to 4 The upper part of the shell 1 is provided with a water outlet 11 that communicates with the outside. After the liquid settles in the second chamber 20, the liquid floating on the top is basically clean water, which can be discharged from the sewage treatment device through the water outlet 11.

[0056] Furthermore, a vent 27 connecting to the outside is provided at the top of the main pipe 2, thereby ensuring normal air pressure inside the main pipe 2 and preventing excessive internal pressure. The connection point between the scum discharge pipe 5 and the main pipe 2 is configured to be higher than the outlet 11, as referenced. Figure 1 and Figure 2 The scum outlet 51 is located higher than the outlet 11. This is because the vent 27 and the outlet 11 are connected to the atmosphere, thus forming a communicating vessel between the first chamber 10 and the second chamber 20, ensuring that the liquid levels in both chambers remain consistent. If the scum outlet 51 were located too low, a large amount of liquid without scum would flow directly out of the scum discharge pipe 5, resulting in water waste. By setting the scum outlet 51 higher than the outlet 11, no liquid will flow out of the scum discharge pipe 5 when the system is stationary. Only when the aeration device 4 is working can the scum be discharged into the scum discharge pipe 5 under the influence of the upward flow.

[0057] In one embodiment of this disclosure, reference is made to Figures 1 to 4 The wastewater treatment device also includes an overflow weir 12, which is circumferentially positioned around the upper part of the second chamber 20. The overflow weir 12 can be fixed to the inner top edge of the shell 1, and an overflow channel 122 can be formed between it and the inner wall of the shell 1. The outlet 11 is connected to the overflow channel 122. The clean water floating on top in the second chamber 20 can overflow from the overflow weir 12 into the overflow channel 122. When a certain amount of clean water is collected in the overflow channel 122, the clean water can be discharged from the outlet 11 as the liquid level rises naturally. By setting the overflow weir 12, the stability and uniformity of the effluent can be ensured, and the effluent from the outlet 11 will not be affected by water flow fluctuations.

[0058] Furthermore, such as Figure 2 As shown, the top of the overflow weir 12 is provided with multiple overflow gaps 121 at intervals. For example, the top edge of the overflow weir 12 can be set to a sawtooth or wavy shape. Clean water can overflow from the overflow gaps 121 to the overflow trough 122. The multiple overflow gaps 121 are evenly distributed in the circumferential direction, thereby further improving the uniformity and stability of the clean water overflow.

[0059] In one embodiment of this disclosure, such as Figure 5As shown, the main pipe 2 includes a first pipe section 21 and a second pipe section 22 arranged from top to bottom. The fluid mixer is disposed in the first pipe section 21, and the connecting port 26 is disposed at the bottom of the second pipe section 22. The flow cross-sectional area of ​​the second pipe section 22 is constructed to gradually increase from top to bottom, that is, the second pipe section 22 can be constructed with a flared shape. This allows the liquid in the first chamber 10 to be buffered and have its flow velocity reduced in the second pipe section 22 after pretreatment before entering the second chamber 20, thereby avoiding excessive impact when the water flows into the second chamber 20 and avoiding interference with the sedimentation process in the second chamber 20.

[0060] Further reference Figure 5 The main pipeline 2 also includes a third pipe section 23, which is constructed to be higher than the inlet 31. The scum discharge pipe 5 is installed on the third pipe section 23. The flow cross-sectional area of ​​the third pipe section 23 is constructed to be smaller than that of the first pipe section 21. Specifically, the flow cross-sectional area of ​​the third pipe section 23 can gradually decrease from bottom to top, or it can suddenly decrease. When the rising flow carrying scum enters the third pipe section 23 from the first pipe section 21, the flow velocity will suddenly increase, thereby allowing the scum to rise above the water surface and enter the scum discharge pipe 5. By setting the structure of the main pipeline 2, this disclosure eliminates the need for mechanical equipment such as pumps when discharging scum, thereby further reducing the energy consumption and maintenance costs of the device.

[0061] In one embodiment of this disclosure, reference is made to Figure 1 and Figure 3 Multiple flow stabilizers 9 are installed in the second chamber 20 at a position higher than the sedimentation zone 201 and lower than the outlet 11, and are spaced apart around the main pipe 2. One end of each flow stabilizer 9 is fixed to the outer wall of the main pipe 2, and the other end is configured to extend radially toward the housing 1 along the main pipe 2. The flow stabilizer 9 may extend to contact the inner wall of the housing 1, or a gap may be left between it and the inner wall of the housing 1; this disclosure does not limit this.

[0062] Wastewater entering the second chamber 20 is guided by the flow stabilizer 9 and dispersed into the sedimentation zone 201, significantly reducing short-circuiting and eddy currents. Specifically, the flow stabilizer 9 can be vertically positioned in the center of the second chamber 20, ensuring a stable upward flow of water. The second chamber 20 is divided circumferentially by multiple flow stabilizers 9, thus preventing eddies from forming around the main pipe 2. The flow stabilizer 9 optimizes the water flow path, reduces water flow disturbance, makes the water flow more uniform, enhances the settling effect on fine particles, improves settling efficiency, and ensures water quality stability.

[0063] It should be noted that, in addition to using the flow stabilizer plate 9 to reduce short-circuiting and eddy currents, honeycomb packing or inclined flow guide components can also be used as alternatives. Honeycomb packing utilizes a porous structure to increase the settling area, resulting in a smaller footprint and higher settling efficiency, but it is prone to clogging and requires regular cleaning. Inclined flow guide components guide the water flow to a uniform distribution through diversion, offering flexible design that can be adjusted according to flow rate and water quality, but may cause some disturbance to the flocs, making them suitable for sedimentation tanks requiring high flow rate optimization. In this embodiment, the flow stabilizer plate 9 is preferred for flow stabilization.

[0064] In one specific embodiment of this disclosure, such as Figure 4 As shown, multiple flow stabilizers 9 divide the second chamber 20 into multiple liquid storage zones 202. Multiple through holes 91 are provided on the flow stabilizers 9 to connect adjacent liquid storage zones 202. The interconnection of multiple liquid storage zones 202 ensures that the water quality in each zone remains essentially consistent, preventing situations where the particle concentration in some liquid storage zones 202 is excessively high, thereby improving water quality stability.

[0065] In one embodiment of this disclosure, reference is made to Figure 5 A guide plate 24 is installed below the main pipe 2. The guide plate 24 is configured to extend obliquely downward or horizontally. The liquid flow in the first chamber 10 is configured to flow downward to the guide plate 24 and flow into the second chamber 20 along the extension direction of the guide plate 24. Specifically, the guide plate 24 is configured to be fixedly connected to the bottom of the main pipe 2 by multiple connecting ribs 25. The multiple connecting ribs 25 are configured to form multiple connecting ports 26 together with the guide plate 24 and the main pipe 2. The guide plate 24 can change the direction of the liquid flowing out of the first chamber 10. Specifically, it can guide the vertically flowing liquid to flow in a horizontal or obliquely downward direction, thereby reducing the water flow velocity and ensuring that suspended particles are not disturbed or impacted by the water flow during the settling process in the second chamber 20.

[0066] This disclosure optimizes the water flow path, reduces short-circuiting and eddies, extends particle settling time, and improves sedimentation efficiency through the synergistic effect of the flow stabilizer 9 and the guide plate 24, ensuring efficient separation of fine particles. Particles in the wastewater have sufficient settling time and space. The guide plate 24 reduces the water flow velocity while changing the water flow direction, preventing suspended particles from being re-engaged by water flow disturbance. Compared to the potential problems of uneven water flow distribution and low settling efficiency in traditional vertical flow sedimentation tanks, this disclosure significantly improves particle settling rate and separation efficiency.

[0067] In one embodiment of this disclosure, the diameter of the housing 1 is constructed to be less than or equal to 3m, thereby significantly reducing the footprint of the wastewater treatment device and making it suitable for scenarios with limited land resources. The small-sized wastewater treatment device provided by this disclosure has a relatively small daily wastewater treatment capacity, for example, it can treat about one hundred tons of wastewater per day, and is therefore suitable for factories, industrial parks, treatment plants, urban areas, etc., with small wastewater treatment needs.

[0068] Based on the above structural description, the main working process of the wastewater treatment device is as follows: Wastewater is conveyed through inlet 31 into the first chamber 10 located inside the main pipe 2, where it undergoes preliminary purification treatment such as aeration to remove scum, coagulation, and flocculation. Under the influence of gravity, the wastewater flows downwards and enters the second chamber 20 through the connecting port 26 at the bottom of the main pipe 2. The flow direction is changed and the flow velocity is reduced by the guide plate 24. The flow stabilizing plate 9 in the second chamber 20 further reduces water flow disturbance, thereby guiding particles and flocs in the wastewater to settle to the sedimentation zone at the bottom of the second chamber 20. The resulting clear water after sedimentation flows out through the overflow weir 12 from the outlet 11, and the sludge in the sedimentation zone 201 is periodically cleaned and discharged through the sludge discharge pipe 7.

[0069] The wastewater treatment device disclosed herein features an integrated design that compactly integrates all wastewater treatment process modules (coagulation, flocculation, sedimentation, scum removal, etc.) into a single device, thereby improving wastewater treatment efficiency. The integrated wastewater treatment device reduces water transport links and avoids the use of multi-stage pumping equipment, significantly reducing energy consumption and pipeline connection complexity. The smaller size design reduces the footprint of the wastewater treatment device, making it suitable for scenarios with limited land resources.

[0070] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, and are not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein. The scope of this disclosure is defined by the appended claims.

Claims

1. A wastewater treatment device, characterized in that, include: The shell (1) has an inner cavity and an outlet (11) communicating with the outside is provided at the upper part of the shell (1). The main pipe (2) is located in the inner cavity and is constructed to enclose and form a first chamber (10). The part of the inner cavity located outside the main pipe (2) is referred to as the second chamber (20). The bottom of the main pipe (2) is provided with a connecting port (26) for connecting the first chamber (10) and the second chamber (20). The upper part of the main pipe (2) is provided with an inlet (31) for inputting sewage into the first chamber (10). An aeration device (4) is installed in the first chamber (10) at a position lower than the inlet (31) and is configured to aerate from bottom to top to form an upward flow in the first chamber (10); a scum discharge pipe (5) connected to the outside is provided at the upper part of the main pipe (2), and the scum in the sewage is configured to be discharged through the scum discharge pipe (5) under the action of the upward flow.

2. The wastewater treatment device according to claim 1, characterized in that, It also includes a dosing device (6), which is located in the first chamber (10) at a position lower than the aeration device (4) and is configured to deliver chemicals to the wastewater; a sedimentation zone (201) is provided at the bottom of the second chamber (20), and a sludge discharge pipe (7) communicating with the outside is provided on the shell (1), which is constructed to extend to the sedimentation zone (201), and the precipitate generated by the reaction of wastewater and chemicals is configured to be discharged through the sludge discharge pipe (7).

3. The wastewater treatment device according to claim 2, characterized in that, It also includes a fluid mixer, which is located in the first chamber (10) at a position lower than the dosing device (6), and the wastewater is configured to be uniformly mixed with the agent under the action of the fluid mixer.

4. The wastewater treatment device according to claim 3, characterized in that, The fluid mixer is a static mixer (8), which is configured to form a spiral flow channel (81) extending along the axial direction of the main pipe (2) within the first chamber (10).

5. The wastewater treatment device according to claim 3, characterized in that, The main pipe (2) includes a first pipe section (21) and a second pipe section (22) arranged from top to bottom. The fluid mixer is located in the first pipe section (21), and the connecting port (26) is located at the bottom of the second pipe section (22). The flow cross-sectional area of ​​the second pipe section (22) is constructed to gradually increase from top to bottom.

6. The wastewater treatment device according to claim 5, characterized in that, The main pipe (2) also includes a third pipe section (23), which is constructed to be higher than the inlet (31), and the scum discharge pipe (5) is disposed on the third pipe section (23); the flow cross-sectional area of ​​the third pipe section (23) is constructed to be smaller than the flow cross-sectional area of ​​the first pipe section (21).

7. The wastewater treatment device according to claim 2, characterized in that, Multiple flow stabilizers (9) are provided in the second chamber (20) at a position higher than the sedimentation zone (201) and lower than the outlet (11). The multiple flow stabilizers (9) are arranged at intervals around the main pipe (2). One end of the flow stabilizer (9) is fixedly provided on the outer wall of the main pipe (2), and the other end is configured to extend towards the shell (1) in the radial direction of the main pipe (2).

8. The wastewater treatment device according to claim 7, characterized in that, Multiple flow stabilizers (9) divide the second chamber (20) into multiple liquid storage areas (202); multiple through holes (91) are provided on the flow stabilizers (9) to connect adjacent liquid storage areas (202).

9. The wastewater treatment device according to claim 2, characterized in that, The dosing device (6) delivers a dosage of 10-50 mg / L of the agent into the wastewater.

10. The wastewater treatment apparatus according to claim 1, characterized in that, A guide plate (24) is provided below the main pipe (2). The guide plate (24) is configured to extend obliquely downward or horizontally. The liquid flow in the first chamber (10) is configured to flow downward to the guide plate (24) and to flow into the second chamber (20) along the extension direction of the guide plate (24).

11. The wastewater treatment apparatus according to claim 10, characterized in that, The guide plate (24) is configured to be fixedly connected to the bottom of the main pipe (2) by multiple connecting ribs (25); the multiple connecting ribs (25) are configured to form multiple connecting ports (26) together with the guide plate (24) and the main pipe (2).

12. The wastewater treatment device according to claim 1, characterized in that, The top of the main pipe (2) is provided with a vent (27) that communicates with the outside; the connection position between the scum discharge pipe (5) and the main pipe (2) is constructed to be higher than the water outlet (11).

13. The wastewater treatment device according to claim 1, characterized in that, It also includes an overflow weir (12), which is arranged around the upper part of the second chamber (20) in the circumferential direction; the top of the overflow weir (12) is provided with a plurality of overflow gaps (121) at intervals.

14. The wastewater treatment device according to claim 1, characterized in that, The aeration device (4) generates bubbles with a diameter range of 50-100 μm; the air volume of the aeration device (4) is 1%-3% of the sewage influent flow rate.

15. The wastewater treatment device according to claim 1, characterized in that, The diameter of the shell (1) is constructed to be less than or equal to 3m.

Images