A negative pressure cyclone stirring and sedimentation device

Abstract

The utility model relates to sewage treatment and cleaning technical field, the utility model provides a kind of negative pressure cyclone stirring sedimentation device, it includes jar body, jar body inside has the cleaning area and the sedimentation area located below cleaning area with each other, jar body is equipped with inlet, the first pipeline with one end and inlet connection is further equipped with in jar body, first pipeline extends to cleaning area from below to above;Cleaning area is equipped with the mixing cylinder for receiving liquid in first pipeline, the wall of mixing cylinder is equipped with the nozzle with the inside communication of mixing cylinder, nozzle can spray liquid inside mixing cylinder and flush cleaning area side wall. Through the above technical scheme, sludge liquid generated after side wall flushing flows out cleaning area along the side wall of cleaning area, and flows into sedimentation area, sludge sedimentation is carried out in sedimentation area, so that sludge and supernatant are layered for subsequent treatment, by from below to above pipeline setting and corresponding partition, cleaning and sedimentation can be carried out simultaneously, improve processing efficiency.

Description

Technical Field

[0001] The embodiments of this utility model relate to the field of wastewater treatment and cleaning technology, specifically, to a negative pressure swirling stirring sedimentation device. Background Technology

[0002] With the continuous development of industrial production and municipal facilities, the efficient operation of sewage treatment and cleaning equipment has become a key link in ensuring environmental cleanliness and resource recycling.

[0003] Traditional cleaning equipment suffers from the following problems: First, the single-flow rinsing mode is limited by the pressure and angle of the water flow. When faced with stubborn dirt such as chemical crystals on the inner walls of industrial pipes and asphalt residue on concrete surfaces, the cleaning effect is significantly reduced, often requiring repeated cleaning, which is not only time-consuming and labor-intensive but also increases water consumption. Second, traditional equipment separates the sludge sedimentation and cleaning processes. Sludge must first be left to settle and separate in a sedimentation tank before being transferred to the cleaning stage. This separate processing flow significantly extends the overall treatment cycle, resulting in low equipment utilization and making it difficult to meet the demands of modern high-load wastewater treatment scenarios. Third, equipment relying on mechanical agitation for sludge mixing and cleaning not only generates high energy consumption during operation but also suffers from the agitator blades being easily clogged by fibrous debris and large pieces of sand. Frequent downtime for maintenance increases equipment operating costs and affects the continuity and stability of the wastewater treatment system. These technical pain points severely restrict the efficiency improvement and green development of the wastewater treatment and cleaning industry. Utility Model Content

[0004] To overcome the above-mentioned defects, this utility model provides a negative pressure vortex stirring sedimentation device, which solves the technical problem that traditional equipment separates the sludge sedimentation and washing processes, resulting in low equipment utilization.

[0005] According to one aspect, at least one embodiment of the present invention provides a negative pressure swirling stirring sedimentation device, comprising: a tank, wherein the tank has a cleaning zone and a sedimentation zone located below the cleaning zone that are interconnected inside the tank, the tank is provided with a liquid inlet, and the tank is further provided with a first pipeline connected at one end to the liquid inlet, the first pipeline extending from bottom to top to the cleaning zone; The cleaning zone is equipped with a mixing cylinder for receiving liquid from the first pipeline. The peripheral wall of the mixing cylinder is provided with a nozzle that communicates with the inside of the mixing cylinder. The nozzle can spray out the liquid inside the mixing cylinder and flush the side wall of the cleaning zone so that the sludge on the side wall of the cleaning zone falls into the sedimentation zone.

[0006] For example, in at least one embodiment of the present invention, a negative pressure swirling stirring sedimentation device is provided, wherein the tank body is further provided with a second pipeline connecting the first pipeline and the mixing cylinder, the middle part of the second pipeline in the length direction is a throat, the throat extends towards the mixing cylinder and the first pipeline, and the inner diameter of the second pipeline gradually increases; it also includes: An absorption pipe is provided, with one end connected to the throat and the other end extending into the sedimentation zone. The throat is capable of generating negative pressure, which draws the sludge in the sedimentation zone into the second pipeline through the absorption pipe.

[0007] For example, in a negative pressure swirling stirring sedimentation device provided in at least one embodiment of the present invention, the mixing cylinder has a conical part, the bottom of the conical part is connected to the upper part of the second pipeline, and the inner diameter of the mixing cylinder gradually increases in the direction away from the second pipeline.

[0008] For example, in a negative pressure swirling stirring sedimentation device provided in at least one embodiment of the present invention, the ratio of the diameter of the throat to the diameter of the liquid inlet is 1:3-1:5.

[0009] For example, in a negative pressure swirling stirring sedimentation device provided in at least one embodiment of the present invention, the sedimentation zone is cone-shaped and extends away from the washing zone, the inner diameter of the sedimentation zone gradually decreases, and the tank also has a drain pipe connected to the bottom of the sedimentation zone for discharging sludge from the sedimentation zone.

[0010] For example, in a negative pressure swirling stirring sedimentation device provided in at least one embodiment of the present invention, the angle between the sedimentation zone and the bottom of the tank is 60°-75°.

[0011] For example, in a negative pressure swirling sedimentation device provided in at least one embodiment of the present invention, the upper part of the tank also has a liquid outlet for discharging the supernatant after the sludge liquid has settled.

[0012] For example, in a negative pressure swirling stirring sedimentation device provided in at least one embodiment of the present invention, the nozzle has a first section communicating with the interior of the mixing cylinder and a second section having an angle with the first section, the first section and the second section being interconnected to form a tortuous flow path for the liquid.

[0013] For example, in a negative pressure swirling stirring sedimentation device provided in at least one embodiment of the present invention, the nozzle extends downward at an angle away from the mixing cylinder.

[0014] For example, in a negative pressure swirling stirring sedimentation device provided in at least one embodiment of the present invention, the nozzle has a plurality of nozzles, and the plurality of nozzles are arranged at intervals along the circumference of the mixing cylinder.

[0015] The beneficial effects of the embodiments of this utility model are as follows: In this invention, the tank is internally divided into interconnected cleaning and settling zones, forming an integrated processing space. The cleaning zone is located above the settling zone, with an inlet for introducing high-pressure water. One end of a first pipeline is connected to the inlet and extends upwards to the cleaning zone, delivering the high-pressure water. A mixing cylinder is positioned within the cleaning zone to receive the liquid from the first pipeline. Multiple nozzles are installed on the circumferential wall of the mixing cylinder, spraying the liquid at a specific angle and speed to flush the sidewalls of the cleaning zone. The resulting sludge liquid flows downwards along the sidewalls of the cleaning zone and into the settling zone, where sludge settles, separating the sludge and clear liquid for subsequent processing. This design, through its bottom-up piping and corresponding partitioning, allows cleaning and settling to occur simultaneously, improving processing efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this utility model and these drawings without any creative effort.

[0017] Figure 1 This is a schematic diagram of the internal structure of the tank body of this utility model; Figure 2 for Figure 1 A top view of the tank interior in the embodiment; In the diagram: 1. Tank body; 101. Cleaning area; 102. Sedimentation area; 103. Liquid inlet; 104. Drain pipe; 105. Liquid outlet; 2. First pipeline; 3. Mixing cylinder; 301. Conical section; 4. Second pipeline; 401. Throat; 5. Absorption pipe; 7. Nozzle; 701. First section; 702. Second section. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit its scope.

[0019] To keep the drawings concise, only the parts relevant to the utility model are shown schematically in each drawing; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0020] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0022] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] like Figures 1-2As shown, this invention illustrates a negative pressure vortex stirring sedimentation device according to one embodiment. The tank 1 is divided into an interconnected cleaning zone 101 and a sedimentation zone 102, forming an integrated processing space. The cleaning zone 101 is located above the sedimentation zone 102. The inlet 103 is used to introduce high-pressure water. One end of the first pipeline 2 is connected to the inlet 103 and extends from bottom to top to the cleaning zone 101, delivering the high-pressure water to the cleaning zone 101. The mixing cylinder 3 is set in the cleaning zone 101 to receive the liquid delivered by the first pipeline 2. Multiple nozzles 7 are provided on the peripheral wall of the mixing cylinder 3. The nozzles 7 can spray the liquid in the mixing cylinder 3 at a certain angle and speed to flush the side wall of the cleaning zone 101. The sludge liquid generated after flushing the side wall flows down the side wall of the cleaning zone 101 and flows into the sedimentation zone 102. Sludge sedimentation occurs in the sedimentation zone 102, causing the sludge and clear liquid to separate into layers for subsequent processing. This solution, through bottom-up piping and corresponding partitions, allows cleaning and sedimentation to be carried out simultaneously, improving processing efficiency.

[0025] In some examples, the second pipe 4 connects the first pipe 2 and the mixing cylinder 3, and its structure adopts a venturi tube design, with the throat 401 in the middle being the smallest pipe diameter.

[0026] When high-pressure water flows from the first pipe 2 to the throat 401, the flow velocity increases significantly due to the narrowing of the pipe diameter, creating a negative pressure zone according to fluid mechanics principles. The throat 401 is connected to the first pipe 2 and the mixing cylinder 3 via diffuser sections on both sides, causing the high-pressure water to gradually decrease in velocity and increase in pressure after passing through the throat 401, ultimately smoothly delivering the mixed fluid to the mixing cylinder 3. During this process, the negative pressure in the throat 401 connects to the sedimentation zone 102 through the absorption pipe 5, creating a suction force for the substances within the sedimentation zone 102.

[0027] One end of the absorption pipe 5 is connected to the negative pressure zone of the throat 401, and the other end extends into the sedimentation zone 102. When a negative pressure is generated in the throat 401, the sludge (or liquid) in the sedimentation zone 102 is drawn into the absorption pipe 5 under the action of the pressure difference, and then enters the second pipe 4, where it is fully mixed with the high-pressure water from the first pipe 2 in the throat 401 and the diffuser section. This process does not require additional power equipment, but is driven solely by the kinetic energy of the fluid itself, realizing the active circulation and transportation of sludge from the sedimentation zone 102 to the cleaning zone 101.

[0028] The Venturi structure of the second pipe 4 allows the high-pressure water and the sucked-in sludge to mix violently during high-speed flow, forming a flushing fluid with a higher solids content. When this fluid is ejected through the nozzle 7 of the mixing cylinder 3, the collision friction generated by the sludge particles in the swirling flow enhances the ability to peel off stubborn dirt from the sidewalls of the cleaning zone 101, making it particularly suitable for removing chemical crystals or viscous deposits from the inner walls of industrial pipes. Simultaneously, if flocculants or other agents are sucked in through the absorption pipe 5, the turbulent environment inside the Venturi tube allows the agents to mix instantly and uniformly with the water, improving reaction efficiency.

[0029] In some examples, the conical portion 301 of the mixing cylinder 3 is flared, narrow at the bottom and wide at the top. The bottom connects to the upper end of the second pipe 4 (Venturi tube), and the top extends towards the main body of the mixing cylinder 3. When the fluid (a mixture of high-pressure water and sludge or chemicals) that has been accelerated through the second pipe 4 flows into the conical portion 301, the flow space increases as the inner diameter of the conical portion 301 gradually expands from bottom to top, resulting in a gradual decrease in flow velocity and a gradual increase in pressure. This process converts the kinetic energy of the fluid into static pressure energy, creating a stable pressure distribution as the fluid enters the main body of the mixing cylinder 3, laying the foundation for subsequent uniform injection through the nozzle 7.

[0030] The gradually expanding structure of the conical section 301 can effectively buffer the high-speed jet from the outlet of the second pipe 4, avoiding impact and turbulence caused by uneven fluid velocity. As the flow cross-sectional area increases, the fluid velocity gradient gradually flattens, and the pressure distribution tends to be uniform, ensuring that the static pressure of the fluid in each area of ​​the mixing cylinder 3 is consistent, thereby making the water flow intensity ejected from the peripheral nozzle 7 uniform and avoiding the phenomenon that some areas have strong scouring force and some areas have weak scouring force.

[0031] If the fluid contains sludge particles or chemicals, the expanding flow channel of the cone 301 will promote more thorough shearing and collision between the solid and liquid phases or the liquid and liquid phases. The sludge particles will move relative to the liquid due to the reduced flow velocity, forming local eddies, which will enhance solid-liquid mixing. The chemicals and water will further diffuse in the turbulent environment of the cone 301, which will make up for the short mixing time of the Venturi tube, make the chemicals more evenly dispersed, and accelerate chemical reactions (such as the mixing reaction of flocculants and sewage).

[0032] The conical section 301 ensures uniform static pressure of the fluid within the mixing cylinder 3 through dual regulation of flow rate and pressure, making the spray flow rate and velocity of each nozzle 7 essentially consistent. For example, when the fluid enters the mixing cylinder 3 through the conical section 301, the pressure difference at the outlet of each nozzle 7 is significantly reduced, and the scouring force tends to be consistent. This effectively avoids the cleaning blind spots caused by pressure fluctuations in traditional structures, improving the uniformity and reliability of the cleaning effect.

[0033] The tapered section 301's gradually expanding design can slow down the flow rate of larger particles (such as sand and fibers) in the fluid, reduce the impact wear of particles on the nozzle 7, and prevent high-viscosity fluid from stagnating or clogging in the flow channel due to excessive flow rate. When the inlet flow rate or concentration changes, the expansion characteristic of the tapered section 301 can automatically adjust the fluid residence time to adapt to the mixing requirements under different working conditions and prevent system instability caused by sudden changes in fluid.

[0034] In some examples, when the inlet diameter is fixed, the smaller the diameter of the throat 401 (approaching a ratio of 1:5), the more significant the increase in fluid velocity when flowing through the throat 401. This increased velocity leads to a decrease in static pressure at the throat 401, resulting in a stronger negative pressure. Conversely, if the diameter of the throat 401 is larger (approaching a ratio of 1:3), the negative pressure intensity weakens, but the resistance to fluid flow through the throat 401 is lower. This is suitable for scenarios where high flow rates are required but low negative pressure is not necessary. This range ensures sufficient negative pressure suction capacity while avoiding excessive fluid resistance or blockage risks caused by an excessively narrow throat 401.

[0035] In some examples, the sedimentation zone 102 adopts a conical design, with its inner diameter gradually narrowing from below the cleaning zone 101 (upper part of tank 1) to the bottom (the side away from the cleaning zone 101), forming a funnel-shaped space that is wider at the top and narrower at the bottom. When the sludge-containing fluid falls from the cleaning zone 101 into the sedimentation zone 102, the flow velocity gradually decreases as the inner diameter of the conical hopper decreases during the downward flow. The sludge particles separate from the fluid due to gravity and settle to the inner wall of the conical hopper. As the sludge accumulates, the concentrated sludge slides down the conical hopper wall to the bottom and is eventually discharged through the drain pipe 104, while the separated clear liquid overflows from above the sedimentation zone 102 (where it connects to the cleaning zone 101) and is discharged through the liquid outlet 105 at the top of the tank 1.

[0036] The tapered shape of the cone causes the fluid to flow centripetally within the settling zone 102. As the cross-sectional area decreases during flow, sludge particles are forced to aggregate towards the center, while the reduced flow velocity further prolongs the settling time. This design combines gravity settling with fluid dynamics concentration, increasing sludge settling velocity and forming a higher-concentration sludge layer (with reduced moisture content) compared to a traditional advection settling zone 102, thus reducing the amount of sludge requiring subsequent treatment.

[0037] In some examples, the angle between the conical sidewall of the sedimentation zone 102 and the horizontal plane is 60°-75°. The larger the angle (e.g., 75°), the steeper the sidewall, and the greater the component of the sludge sliding down the wall under gravity, resulting in a faster sludge discharge rate. Conversely, the smaller the cone angle (e.g., 60°), the gentler the sidewall slope, and the smoother the flow of the sludge-containing fluid within the cone, which facilitates the slow settling of sludge particles and reduces disturbance to the supernatant. This range ensures rapid sludge descent while avoiding excessive fluid impact due to an excessively large angle, which could negatively impact solid-liquid separation.

[0038] In some examples, the outlet 105 is located on the upper part of the tank 1, above the cleaning zone 101. After the sludge-containing fluid completes solid-liquid separation in the sedimentation zone 102, the less dense clear liquid floats on the upper layer. The position of the outlet 105 is usually higher than the interface between the cleaning zone 101 and the sedimentation zone 102 to ensure that only the separated clear liquid is discharged, avoiding the carrying of unsettled sludge particles.

[0039] In some examples, nozzle 7 consists of two sections. The first section 701 is directly connected to the interior of mixing cylinder 3. The fluid (high-pressure water and mixing medium) enters the first section 701 from mixing cylinder 3 and flows to the second section 702. The second section 702 forms an angle with the first section 701, causing the fluid path to bend. When the fluid flows through the connection between the two sections, turbulence is generated inside nozzle 7. The angle of the bend is an obtuse arc transition rather than a right angle sharp edge, which reduces the risk of retention of suspended matter (such as sand, gravel, and sludge flocs) in the fluid. When treating fluids with high solids content, particles can pass smoothly through nozzle 7 guided by the bend in the flow path, avoiding accumulation and blockage at the inlet. The bend in the path nozzle 7 generates a rotating jet by guiding the flow direction, which can improve cleaning efficiency.

[0040] In some examples, nozzles 7 are arranged at an angle downwards away from the mixing cylinder 3, with their axes forming a certain angle (typically 15°-45°) with the radial direction of the mixing cylinder 3. When fluid is ejected from nozzles 7, the velocity vector can be decomposed into radial and tangential components. The radial component provides an impact force perpendicular to the wall surface to remove dirt, while the tangential component drives the fluid to move tangentially along the wall surface, forming a downward rotating circulation that propels the flushed sludge towards the sedimentation zone 102. This allows the jet to flush the wall surface while guiding the muddy fluid downwards along the sidewall of the cleaning zone 101. Multiple nozzles 7 are evenly distributed circumferentially around the mixing cylinder 3 (e.g., spaced 30°-60° apart), and the jets ejected from each nozzle 7 form an annular swirling field in the cleaning zone 101, increasing the coverage area.

[0041] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A negative pressure swirling stirring sedimentation device, characterized in that, include: The tank (1) has a cleaning zone (101) and a sedimentation zone (102) that are interconnected inside the tank (1). The sedimentation zone (102) is located below the cleaning zone (101). The tank (1) is provided with a liquid inlet (103). The tank (1) is also provided with a first pipe (2) with one end connected to the liquid inlet (103). The first pipe (2) extends from bottom to top to the cleaning zone (101). The cleaning zone (101) is provided with a mixing cylinder (3) for receiving liquid in the first pipeline (2). The peripheral wall of the mixing cylinder (3) is provided with a nozzle (7) that communicates with the inside of the mixing cylinder (3). The nozzle (7) can spray out the liquid inside the mixing cylinder (3) and flush the side wall of the cleaning zone (101) so that the sludge on the side wall of the cleaning zone (101) falls into the sedimentation zone (102).

2. The negative pressure swirling stirring sedimentation device according to claim 1, characterized in that, The tank (1) is further provided with a second pipe (4) connecting the first pipe (2) and the mixing cylinder (3). The second pipe (4) has a throat (401) at the middle of its length direction. The throat (401) extends toward the mixing cylinder (3), and the inner diameter of the second pipe (4) gradually increases. The throat (401) extends toward the first pipe (2), and the inner diameter of the second pipe (4) gradually increases. It also includes: The absorption pipe (5) is connected at one end to the throat (401) and at the other end to the sedimentation zone (102). The throat (401) can generate negative pressure to draw the sludge in the sedimentation zone (102) into the second pipeline (4) through the absorption pipe (5).

3. The negative pressure swirling stirring sedimentation device according to claim 2, characterized in that, The mixing cylinder (3) has a conical part (301), the bottom of which is connected to the upper part of the second pipeline (4), and the inner diameter of the conical part (301) gradually increases in the direction away from the second pipeline (4).

4. The negative pressure swirling stirring sedimentation device according to claim 2, characterized in that, The diameter ratio of the throat (401) to the diameter of the inlet (103) is 1:3-1:

5.

5. The negative pressure swirling stirring sedimentation device according to claim 1, characterized in that, The sedimentation zone (102) is cone-shaped and extends away from the cleaning zone (101). The inner diameter of the sedimentation zone (102) gradually decreases. The tank (1) also has a drain pipe (104) connected to the bottom of the sedimentation zone (102) for discharging sludge from the sedimentation zone (102).

6. The negative pressure swirling stirring sedimentation device according to claim 5, characterized in that, The angle between the sedimentation zone (102) and the bottom of the tank (1) is 60°-75°.

7. The negative pressure swirling stirring sedimentation device according to claim 1, characterized in that, The upper part of the tank (1) also has a liquid outlet (105) for discharging the supernatant after the sludge liquid has settled.

8. A negative pressure swirling stirring sedimentation device according to any one of claims 1 to 4, characterized in that, The nozzle (7) has a first section (701) communicating with the interior of the mixing cylinder (3) and a second section (702) having an angle with the first section (701), the first section (701) and the second section (702) being connected to each other to form a tortuous flow path for the liquid.

9. The negative pressure swirling stirring sedimentation device according to claim 8, characterized in that, The nozzle (7) extends downward at an angle away from the mixing cylinder (3).

10. A negative pressure swirling stirring sedimentation device according to claim 9, characterized in that, The nozzle (7) has a plurality of nozzles, which are arranged at circumferential intervals along the mixing cylinder (3).

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