Flocculation sedimentation tank for sewage treatment

Abstract

The utility model relates to a flocculation sedimentation tank for sewage treatment, which comprises two sedimentation tanks arranged in sequence, the two sedimentation tanks are communicated through a pipeline, a partition plate is arranged in each sedimentation tank, a circulation opening is formed in each partition plate, and each partition plate divides the corresponding sedimentation tank into two sedimentation cavities; two groups of stirring mechanisms are oppositely arranged on the sedimentation tank; the stirring mechanisms are arranged above the corresponding sedimentation cavities and are used for mixing sewage in the sedimentation cavities; a chemical adding mechanism is further arranged on the sedimentation tank and used for adding a flocculating agent into the sedimentation cavity, sewage can be settled and purified in a longer path and more sufficient time through the series connection design of the double sedimentation tanks and the partition plate separation technology, and therefore the treatment efficiency is improved; pollutants in the sewage are more thoroughly removed, the treated water quality is more stable and reliable, and the stricter environmental protection requirement can be met.

Description

Technical Field

[0001] The present application relates to the technical field of sedimentation tanks, and in particular to a flocculation sedimentation tank for sewage treatment. Background Art

[0002] In the existing sewage treatment process, the flocculation sedimentation tank is a key link, which undertakes the important task of adding flocculants to aggregate tiny particles such as suspended matter and colloids in the sewage into larger flocs, and then achieving solid-liquid separation through gravity sedimentation.

[0003] In existing flocculation sedimentation tanks, when sewage first enters the sedimentation tank, its flow rate and distribution are often uneven, resulting in high sewage concentrations in some areas and relatively low concentrations in others. This unevenness is particularly pronounced after the addition of flocculants, which are typically introduced into the sedimentation tank via spraying or dripping, making it difficult to quickly and evenly mix with all the sewage. Furthermore, due to structural limitations within the sedimentation tank, such as improperly designed or ineffective stirring mechanisms, the flocculants in the sewage have limited contact and collision opportunities with the tiny particles, which in turn affects the sufficiency and efficiency of the flocculation reaction.

[0004] Furthermore, wastewater flowability in traditional sedimentation tanks presents certain issues. Due to the large size and complex structure of these tanks, the flow path within them is long and easily obstructed, causing some wastewater to remain in the tank for an extended period while others may flow out quickly, failing to fully react. This poor flowability not only compromises flocculation but can also lead to unstable treated water quality, making it difficult to meet expected discharge standards.

[0005] In view of the above problems, a flocculation sedimentation tank for sewage treatment is now designed. Utility Model Content

[0006] The embodiment of the present application provides a flocculation sedimentation tank for sewage treatment to solve the problem of uneven mixing of sewage and flocculant due to uneven sewage concentration distribution and uneven sewage flow rate during use of the existing flocculation sedimentation tank in the related art.

[0007] In a first aspect, a flocculation sedimentation tank for sewage treatment is provided, comprising:

[0008] Two sedimentation tanks are arranged in sequence, the two sedimentation tanks are connected by a pipeline, a partition is provided inside the sedimentation tank, a flow port is provided on the partition, and the partition separates the sedimentation tank to form two sedimentation chambers;

[0009] Two sets of stirring mechanisms are arranged on the sedimentation tank, and the stirring mechanisms are arranged above the corresponding sedimentation chambers and mix the sewage inside the sedimentation chambers;

[0010] The sedimentation tank is also provided with a dosing mechanism, which is used to add flocculants into the sedimentation chamber;

[0011] The dosing mechanism includes a supply part and a supply pipe group arranged on the sedimentation tank. The supply part is connected to the supply pipe group for providing flocculant to the supply pipe group. A plurality of diversion pipes are arranged at the bottom of the supply pipe group. The bottom ends of the plurality of diversion pipes extend to the inside of the four sedimentation chambers respectively, and a discharge port is opened on the diversion pipe.

[0012] In some embodiments, the two sedimentation tanks are fitted together, and a sewage inlet pipe and a sewage outlet pipe are respectively provided on opposite sides of the two sedimentation tanks. The bottom of the sedimentation tank close to the sewage outlet pipe is inclined downward.

[0013] In some embodiments, a blood stasis drain pipe is provided at the bottom of the sedimentation tank. The blood stasis drain pipe is arranged at one end of the bottom of the sedimentation tank that is inclined downward, and the other end of the blood stasis drain pipe is connected to an external silt extraction mechanism.

[0014] In some embodiments, the stirring mechanism includes a fixed frame arranged on the sedimentation tank, and a stirring rod rotatably arranged on the fixed frame. The fixed frame is provided with a driving member, and the driving member is connected to the stirring rod and is used to drive the stirring rod to rotate.

[0015] In some embodiments, the supply part includes a storage tank and a pump body, a discharge valve is provided at the bottom of the storage tank, the feed port of the pump body is connected to the discharge valve, and the discharge port of the pump body is connected to the supply pipe group.

[0016] In some embodiments, the supply pipe assembly includes a mounting frame provided on the sedimentation tank, a hose is provided on the mounting frame, one end of the hose is connected to the discharge port of the pump body, and the other end of the hose is provided with a transversely arranged delivery pipe;

[0017] A plurality of diversion pipes are arranged at the bottom of the conveying pipe.

[0018] An embodiment of the present application provides a flocculation sedimentation tank for sewage treatment. Through the series design of double sedimentation tanks and partition separation technology, sewage can be precipitated and purified over a longer path and in a more sufficient time, thereby improving treatment efficiency.

[0019] Through multi-stage sedimentation and sufficient mixing treatment, pollutants in sewage are removed more thoroughly, and the treated water quality is more stable and reliable, able to meet more stringent environmental protection requirements.

[0020] The setting of the stirring mechanism enables the sewage and flocculant to be fully mixed, accelerates the flocculation reaction, increases the formation speed and sedimentation efficiency of flocs, and helps to remove more suspended matter and colloidal particles.

[0021] The design of the dosing mechanism enables accurate and uniform dosing of flocculants, avoids the problem of over- or under-dosing, improves the flocculation effect and reduces operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0023] Figure 1 Schematic diagram of the three-dimensional structure provided in the embodiment of this application Figure 1 ;

[0024] Figure 2 Schematic diagram of the three-dimensional structure provided in the embodiment of this application Figure 2 ;

[0025] Figure 3 A schematic diagram of the three-dimensional structure of the supply pipe group provided in an embodiment of the present application.

[0026] In the figure: 1. Sedimentation tank; 2. Partition; 3. Sedimentation chamber; 4. Stirring mechanism; 41. Fixed frame; 42. Stirring rod; 43. Driving member; 5. Dosing mechanism; 51. Supply unit; 511. Storage tank; 512. Pump body; 52. Supply pipe group; 521. Mounting frame; 522. Hose; 523. Delivery pipe; 53. Diverter pipe; 6. Discharge port. DETAILED DESCRIPTION

[0027] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0028] The embodiment of the present application provides a flocculation sedimentation tank for sewage treatment, which can solve the problem of uneven mixing of sewage and flocculant due to uneven sewage concentration distribution and uneven sewage flow rate during use in existing flocculation sedimentation tanks in the related art.

[0029] See also Figure 1-Figure 3A flocculation sedimentation tank for sewage treatment comprises: two sedimentation tanks 1 arranged in sequence, the two sedimentation tanks 1 being connected by a pipeline, a partition 2 being provided inside the sedimentation tank 1, the partition 2 being provided with a flow port, the partition 2 dividing the sedimentation tank 1 into two sedimentation chambers 3; two sets of stirring mechanisms 4 being provided opposite to each other on the sedimentation tank 1, the stirring mechanisms 4 being arranged above the corresponding sedimentation chambers 3 and mixing the sewage inside the sedimentation chambers 3. The sedimentation tank 1 is also provided with a dosing mechanism 5, the dosing mechanism 5 being used to add flocculant to the interior of the sedimentation chamber 3; the dosing mechanism 5 comprising a supply portion 51 and a supply pipe group 52 provided on the sedimentation tank 1, the supply portion 51 being connected to the supply pipe group 52 for providing flocculant to the supply pipe group 52, a plurality of diversion pipes 53 being provided at the bottom of the supply pipe group 52, the bottom ends of the plurality of diversion pipes 53 respectively extending into the interiors of the four sedimentation chambers 3, and a discharge port 6 being provided on the diversion pipes 53.

[0030] The system consists of two sedimentation tanks 1 arranged in sequence, which are connected by a pipe, so that sewage can pass through two sedimentation chambers 3 in sequence for multi-stage sedimentation treatment, which helps to improve the clarity and removal rate of sewage.

[0031] A partition 2 is provided inside each sedimentation tank 1, and a flow port is provided on the partition 2, which divides the sedimentation tank into two independent sedimentation chambers 3. The existence of the partition limits the direct convection of sewage and promotes the stratification and sedimentation of sewage, while the flow port allows the upper sewage and flocs to pass through when necessary, thereby realizing material exchange between the two chambers.

[0032] A stirring mechanism 4 is positioned above each sedimentation chamber 3. The stirring mechanism thoroughly mixes the sewage and the added flocculant by rotating a stirring rod 42. This mixing action accelerates the contact and collision between suspended matter, colloids, and other tiny particles in the sewage and the flocculant, promoting the flocculation reaction and increasing the floc formation rate and sedimentation efficiency.

[0033] The dosing mechanism 5 consists of a supply part 51 and a supply pipe group 52. The supply part 51 is responsible for storing and providing flocculants. The flocculants enter the supply pipe group 52 through the supply part 51 and are then transported to each sedimentation chamber 3 through the discharge port 6 on the diversion pipe 53.

[0034] Through the double sedimentation tank series design and partition separation technology, sewage can be precipitated and purified over a longer path and for a more sufficient time, thereby improving treatment efficiency.

[0035] Through multi-stage sedimentation and sufficient mixing treatment, pollutants in sewage are removed more thoroughly, and the treated water quality is more stable and reliable, able to meet more stringent environmental protection requirements.

[0036] The setting of the stirring mechanism enables the sewage and flocculant to be fully mixed, accelerates the flocculation reaction, increases the formation speed and sedimentation efficiency of flocs, and helps to remove more suspended matter and colloidal particles.

[0037] The design of the dosing mechanism enables accurate and uniform dosing of flocculants, avoids the problem of over- or under-dosing, improves the flocculation effect and reduces operating costs.

[0038] Specifically, in this embodiment, the two sedimentation tanks 1 are fitted together, and a sewage inlet pipe and a sewage outlet pipe are respectively provided on opposite sides of the two sedimentation tanks 1. The bottom of the sedimentation tank 1 close to the sewage outlet pipe is tilted downward.

[0039] The two sedimentation tanks 1 are structurally fitted together, which not only saves space but also makes the entire treatment system more compact. The fitting design also helps to reduce the gap between the two sedimentation tanks, reducing the risk of leakage or overflow during the sewage treatment process.

[0040] The sewage inlet and outlet pipes are located on opposite sides of the two sedimentation tanks 1. This layout ensures that sewage can smoothly enter the first sedimentation tank 1 for initial treatment and, after a series of reactions and sedimentation, flow through pipes into the second sedimentation tank 1 for further treatment. The sewage outlet pipe is located near the end of the treatment process, facilitating collection and discharge of treated sewage into the system.

[0041] It's worth noting that the bottom of each sedimentation tank 1, near the sewage discharge pipe, features a downwardly sloping design. This tilted bottom structure helps accelerate the aggregation and discharge of settled particles in the sewage. When suspended matter and colloidal particles in the sewage form flocs under the action of the flocculant and settle to the tank bottom, they slide and accumulate along the inclined bottom toward the sewage discharge pipe. This allows these settled particles to be more easily discharged from the system during sludge removal or emptying, maintaining a clean interior and efficient operation.

[0042] Furthermore, a sludge drainage pipe is provided at the bottom of the sedimentation tank 1. The sludge drainage pipe is arranged at one end of the bottom of the sedimentation tank 1 that is inclined downward, and the other end of the sludge drainage pipe is connected to an external sludge extraction mechanism.

[0043] The connection point between the sludge drain pipe and the bottom of the sedimentation tank 1 is usually located at the lowest point to ensure that the sediment can be collected to the maximum extent.

[0044] The other end of the silt removal pipe is connected to an external silt extraction mechanism. This mechanism, which includes a pump, compressor, or other type of suction equipment, is used to extract the sediment from the silt removal pipe and transport it to a subsequent processing or disposal unit. This is prior art and will not be described in detail here.

[0045] In one embodiment, the stirring mechanism 4 includes a fixed frame 41 arranged on the sedimentation tank 1, and a stirring rod 42 rotatably arranged on the fixed frame 41. A driving member 43 is provided on the fixed frame 41, and the driving member 43 is connected to the stirring rod 42 and is used to drive the stirring rod 42 to rotate.

[0046] The driving member 43 includes a reducer and a driving motor. The output shaft of the driving motor is connected to the input shaft of the reducer, and the output shaft of the reducer is connected to the stirring rod 42 .

[0047] When the drive motor starts, it transmits power to the stirring rod 42 through the speed reducer, causing it to begin rotating. As the stirring rod 42 rotates, it continuously mixes the sewage and the added flocculant, forming a uniform mixture. This mixing action promotes contact and collision between suspended matter, colloids, and other tiny particles in the sewage and the flocculant, accelerating the flocculation reaction. Simultaneously, the rotation of the stirring rod helps break up lumps and sediment in the sewage, maintaining its uniformity and fluidity.

[0048] In one embodiment, the supply part 51 includes a storage tank 511 and a pump body 512. A discharge valve is provided at the bottom of the storage tank 511. The feed port of the pump body 512 is connected to the discharge valve, and the discharge port of the pump body 512 is connected to the supply pipe group 52.

[0049] Storage tank 511 is used to store a certain amount of flocculant. Pump 512 is used to transport the flocculant from the tank to supply pipe assembly 52. The pump's inlet is connected to the discharge valve at the bottom of tank 511, allowing it to steadily draw in flocculant. The pump's outlet is connected to supply pipe assembly 52, delivering the flocculant to the desired dosing locations.

[0050] When flocculant needs to be added to the sewage treatment system, the discharge valve at the bottom of the storage tank 511 is first opened to allow the flocculant to flow into the feed port of the pump body 512. The pump body 512 is then started to suck the flocculant from the feed port and deliver it to the supply pipe group 52 through the discharge port.

[0051] In this embodiment, the supply pipe group 52 includes a mounting frame 521 arranged on the sedimentation tank 1, and a hose 522 is provided on the mounting frame 521. One end of the hose 522 is connected to the discharge port of the pump body 512, and the other end of the hose 522 is provided with a horizontally arranged delivery pipe 523; several of the diversion pipes 53 are arranged at the bottom of the delivery pipe 523.

[0052] The mounting frame 521 is a supporting structure for the supply pipe group 52 , which is fixed on the sedimentation tank 1 to provide a stable installation foundation for the subsequent hose 522 and delivery pipe 523 .

[0053] One end of the hose is tightly connected to the discharge port of the pump body 512, ensuring that the flocculant can flow smoothly into the hose; the other end is connected to the delivery pipe 523, guiding the flocculant into the delivery pipe 523. Hose 522 is made of soft, corrosion-resistant material and has a certain degree of flexibility, which can adapt to different installation positions and angles, and also facilitates installation and commissioning.

[0054] The delivery pipe 523 is arranged horizontally below the mounting frame 521 to deliver the flocculant in the hose 522 to each diversion pipe 53. The diversion pipes 53 are arranged at the bottom of the delivery pipe 523 to further distribute the flocculant in the delivery pipe 523 to designated locations of each sedimentation tank.

[0055] A discharge port 6 is provided at the bottom of the diversion pipe 53 for directly injecting flocculant into the sewage to promote the flocculation reaction.

[0056] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0057] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0058] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A flocculation sedimentation tank for sewage treatment, characterized in that: include: Two sedimentation tanks (1) are arranged in sequence, the two sedimentation tanks (1) are connected via a pipeline, a partition (2) is provided inside the sedimentation tank (1), a flow port is provided on the partition (2), and the partition (2) separates the sedimentation tank (1) to form two sedimentation chambers (3); Two sets of stirring mechanisms (4) are arranged opposite to each other on the sedimentation tank (1); the stirring mechanisms (4) are arranged above the corresponding sedimentation chambers (3) and mix the sewage inside the sedimentation chambers (3); The sedimentation tank (1) is further provided with a dosing mechanism (5), and the dosing mechanism (5) is used to add flocculants into the sedimentation chamber (3); The dosing mechanism (5) comprises a supply portion (51) and a supply pipe group (52) arranged on the sedimentation tank (1); the supply portion (51) is connected to the supply pipe group (52) for providing flocculant to the supply pipe group (52); a plurality of diversion pipes (53) are arranged at the bottom of the supply pipe group (52); the bottom ends of the plurality of diversion pipes (53) respectively extend into the interior of the four sedimentation chambers (3); and a discharge port (6) is opened on the diversion pipe (53).

2. A flocculation sedimentation tank for sewage treatment according to claim 1, characterized in that: The two sedimentation tanks (1) are fitted together, and a sewage inlet pipe and a sewage outlet pipe are respectively provided on opposite sides of the two sedimentation tanks (1). The bottom of the sedimentation tank (1) close to the sewage outlet pipe is tilted downward.

3. A flocculation sedimentation tank for sewage treatment according to claim 2, characterized in that: A sludge removal pipe is provided at the bottom of the sedimentation tank (1), and the sludge removal pipe is arranged at one end of the bottom of the sedimentation tank (1) that is inclined downward, and the other end of the sludge removal pipe is communicated with an external sludge extraction mechanism.

4. A flocculation sedimentation tank for sewage treatment according to claim 1, characterized in that: The stirring mechanism (4) comprises a fixed frame (41) arranged on the sedimentation tank (1), a stirring rod (42) rotatably arranged on the fixed frame (41), a driving member (43) being arranged on the fixed frame (41), and the driving member (43) being connected to the stirring rod (42) and used for driving the stirring rod (42) to rotate.

5. The flocculation sedimentation tank for sewage treatment according to claim 1, characterized in that: The supply part (51) comprises a storage tank (511) and a pump body (512); a discharge valve is provided at the bottom of the storage tank (511); the feed port of the pump body (512) is connected to the discharge valve; and the discharge port of the pump body (512) is connected to the supply pipe group (52).

6. A flocculation sedimentation tank for sewage treatment according to claim 5, characterized in that: The supply pipe assembly (52) comprises a mounting frame (521) arranged on the sedimentation tank (1); a hose (522) is arranged on the mounting frame (521); one end of the hose (522) is connected to the discharge port of the pump body (512); and the other end of the hose (522) is provided with a transversely arranged delivery pipe (523); A plurality of diversion pipes (53) are arranged at the bottom of the delivery pipe (523).

Images