Grit chamber for sewage treatment

Abstract

The utility model provides a grit chamber for sewage treatment, which comprises a chamber body, a plurality of grit chambers and a plurality of grit chambers, a cavity for storing water is formed on the inner side of the chamber body, and the bottom of the chamber body is conical; the water inlet and the water outlet are both formed in the upper part of the tank body, and the water inlet and the water outlet are both communicated with the cavity; a plurality of inclined plates are arranged on the two sides of the inner wall of the tank body from top to bottom, and the inclined plates incline downwards from the inner wall of the tank body to the middle of the tank body. According to the utility model, through the arrangement of the plurality of inclined plates and the utilization of a shallow layer precipitation theory, the precipitation distance of the gravels is shortened, so that more gravels are precipitated and collected within the same time, and part of the gravels form a larger gravel group, which is more beneficial to the precipitation of the gravels, thereby obviously improving the removal efficiency of the gravels.

Description

Technical Field

[0001] This utility model relates to the technical field of sewage treatment, and in particular to a sedimentation tank for sewage treatment. Background Technology

[0002] Wastewater treatment processes typically require the installation of grit chambers during the pretreatment stage to settle fine sand and gravel in the wastewater. This helps protect subsequent pipes and valves from wear and tear and further improves the effectiveness of subsequent biological treatment.

[0003] Currently used aerated grit chambers, horizontal flow grit chambers, and vortex grit chambers are effective at removing sand and gravel particles larger than 200 micrometers (accounting for approximately 70% to 95% of the discharged sand), but less effective at removing smaller particles (accounting for approximately 5% to 30% of the discharged sand). This is detrimental to subsequent treatment of wastewater containing a high amount of fine sand and gravel. Utility Model Content

[0004] Therefore, the purpose of this utility model is to provide a grit chamber for sewage treatment.

[0005] This utility model provides the following technical solution: a grit chamber for sewage treatment, comprising:

[0006] The pool body has a cavity for storing water formed on its inner side, and the bottom of the pool body is conical;

[0007] The inlet and outlet are both located on the upper part of the pool body and are connected to the cavity.

[0008] Multiple inclined plates are arranged from top to bottom on both sides of the inner wall of the pool, and the inclined plates are inclined downward from the inner wall of the pool towards the middle.

[0009] A sand collection tank is formed at the bottom of the inner side of the tank body, and the sand collection tank is connected to the cavity of the tank body;

[0010] A sand-pushing assembly is used to push the sediment at the bottom of the cavity into the sand collection tank;

[0011] A sand removal component is used to remove settled sand from the sand collection tank.

[0012] Furthermore, the bottom inner side of the pool body is sloping, and the slope is formed by the inner wall of the pool body sloping downwards towards the sand collection pool.

[0013] Furthermore, the angle between the inclined plate and the horizontal plane is greater than 30 degrees.

[0014] Furthermore, the sand-pushing assembly includes a motor mounted on the outer wall of the pool body and a screw rod mounted on the output shaft of the motor, the screw rod being located at the bottom of the inner side of the pool body; when the motor is started, it drives the screw rod to rotate, thereby pushing the sediment at the bottom of the pool body into the sand collection tank.

[0015] Furthermore, the sand removal assembly includes an air supply unit, a sand-water separator, an aeration pipe connected to the output end of the air supply unit, and a sand discharge pipe connected to the input end of the sand-water separator. The tail end of the sand discharge pipe extends into the sand collection tank, and the end of the aeration pipe extends from the tail end of the sand discharge pipe into the inside of the sand discharge pipe.

[0016] Furthermore, the tail end of the sand discharge pipe is flared, and the bottom of the flared end is close to the bottom of the sand collection tank.

[0017] Furthermore, the air supply unit is a blower or an air compressor.

[0018] Furthermore, the bottom end face of the spiral rod is in contact with the bottom inner side of the pool body.

[0019] The beneficial effects of this utility model are as follows: by setting multiple inclined plates and utilizing the shallow sedimentation theory, the sedimentation distance of the sand and gravel is shortened, allowing more sand and gravel to settle and accumulate in the same amount of time. Some of the sand and gravel form larger sand and gravel clumps, which is more conducive to the sedimentation of the sand and gravel, thereby significantly improving the sand and gravel removal efficiency. Furthermore, through the sand pushing component, the sand and gravel at the bottom of the pool can be pushed from one side of the inlet into the sand collection pool. Then, the sand and gravel in the sand collection pool are discharged through the sand removal component, which can collect and discharge the sand and gravel in the pool in the first time, thereby further improving the sand and gravel removal efficiency. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0021] Figure 2 This is a three-dimensional structural diagram of the pool body of this utility model.

[0022] Figure 3 This is a three-dimensional structural diagram of the sand-pushing component of this utility model.

[0023] Figure 4 This is a three-dimensional structural diagram of the sand removal component of this utility model.

[0024] Figure 5 This is a three-dimensional structural diagram of the aeration pipe and sand discharge pipe of this utility model.

[0025] The labels in the attached diagram are as follows: 1-pool body, 2-inlet, 3-outlet, 4-bottom, 5-slope, 6-sand collection tank, 7-sand pushing assembly, 71-motor, 72-screw rod, 73-support, 8-sand removal assembly, 81-sand discharge pipe, 82-bell mouth, 84-aeration pipe, 85-blower, 9-sloping plate. Detailed Implementation

[0026] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0027] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0029] A grit chamber for wastewater treatment, such as Figures 1-3 As shown, the system includes: a pool body 1, with a cavity for water storage formed on the inner side of the pool body 1, and the bottom 4 of the pool body 1 being conical; an inlet 2 and an outlet 3, both of which are located on the upper part of the pool body 1 and are connected to the cavity; multiple inclined plates 9, arranged from top to bottom on both sides of the inner wall of the pool body 1, the inclined plates 9 sloping downwards from the inner wall of the pool body 1 towards the center; a sand collection pool 6, formed on the bottom 4 of the inner side of the pool body 1, and connected to the cavity of the pool body 1; a sand pushing assembly 7, used to push the settled sand at the bottom 4 of the cavity into the sand collection pool 6; and a sand removal assembly 8, used to remove the settled sand in the sand collection pool 6.

[0030] The bottom 4 of the pool body 1 is conical, which allows the sediment to move towards the middle of the bottom 4 of the pool body 1. The inlet 2 receives the water from the previous treatment stage. A water pump can be installed at the inlet 2 to pump the water from the previous treatment stage into the pool body 1. In other embodiments, a water pump may not be installed at the inlet 2, and the water from the previous treatment stage will flow into the pool body 1 automatically by gravity. An outlet 3 is opened on the opposite side of the inlet 2. The sand collection pool 6 is on the same side as the outlet 3. Multiple keels are provided between the inclined plates 9 to fix each inclined plate 9 in a corresponding position. The angle between the inclined plate 9 and the horizontal plane is greater than 30 degrees. The distance between the inclined plates 9 can be calculated based on the water volume, the SS concentration of the influent, and the volume of the pool body 1.

[0031] It is understandable that sewage enters tank 1 from inlet 2. The sand and gravel in the sewage settle under the action of gravity. According to the shallow sedimentation theory, the sedimentation time of sand and gravel is proportional to the sedimentation distance. The short distance between the two inclined plates 9 is conducive to the sedimentation of sand and gravel. The sand and gravel can quickly settle on the lower inclined plate 9 and slide down the inclined plate 9 to the middle of the tank and then sink to the bottom of the tank. The operator can also start the sand pushing component 7 to push the sand and gravel at the bottom of the tank from one side of inlet 2 into the sand collection tank 6. When the sand collection tank 6 accumulates to a certain volume, the operator can turn on the sand removal component 8 to discharge the sand and gravel in the sand collection tank 6.

[0032] like Figure 3 As shown, the bottom 4 of the inner side of the pool body 1 is shaped like a slope 5, which is formed by the inner wall of the pool body 1 sloping downwards towards the sand collection pool 6.

[0033] It is understandable that setting the inner bottom 4 of pool 1 in the shape of a slope 5 can facilitate the flow of sand and gravel that sink to the bottom 4 of pool 1 into the sand collection pool 6.

[0034] like Figure 3 As shown, the sand pushing assembly 7 includes a motor 71 installed on the outer wall of the pool body 1 and a screw rod 72 installed on the output shaft of the motor 71. The screw rod 72 is located at the bottom 4 of the inner side of the pool body 1. When the motor 71 is started, it drives the screw rod 72 to rotate, thereby pushing the sediment at the bottom 4 of the pool body 1 into the sand collection pool 6.

[0035] The motor 71 is installed on the outer wall of the pool body 1, and a screw rod 72 is installed on the inner side of the pool body 1 near the sand collection tank 6. One end of the screw rod 72 is connected to the output shaft of the motor 71, and the other end is rotatably connected to the bracket 73. The bracket 73 ensures the stable rotation of the screw rod 72. It can be understood that when the operator starts the motor 71, the output shaft of the motor 71 rotates, which drives the screw rod 72 to rotate. The rotation of the screw rod 72 pushes the sediment at the bottom 4 of the pool body 1 towards the sand collection tank 6, and finally pushes it into the sand collection tank 6.

[0036] like Figure 4 and Figure 5 As shown, the sand removal assembly 8 includes an air supply unit, a sand-water separator, an aeration pipe 84 connected to the output end of the air supply unit, and a sand discharge pipe 81 connected to the input end of the sand-water separator. The sand-water separator is existing technology and is not shown in the figure. The tail end of the sand discharge pipe 81 extends into the sand collection tank 6, and the end of the aeration pipe 84 extends from the tail end of the sand discharge pipe 81 into the inside of the sand discharge pipe 81.

[0037] The preferred air supply unit is a blower 85, but in other embodiments it can be an air compressor. When the sand and gravel in the sand collection tank 6 accumulate to a certain volume, the operator can turn on the blower 85. The blower 85 sends air into the aeration pipe 84 and into the sand discharge pipe 81 from the end of the aeration pipe 84. After the air enters the sand discharge pipe 81, it is discharged upward. At this time, a negative pressure is formed in the sand discharge pipe 81. The sand and gravel and water in the sand collection tank 6 are drawn into the sand-water separator through the sand discharge pipe 81, thereby completing the sand discharge work. After the sand discharge work is completed, the blower 85 can be turned off.

[0038] The tail end of the sand discharge pipe 81 is shaped like a trumpet 82, and the bottom 4 of the trumpet 82 is close to the bottom 4 of the sand collection tank 6.

[0039] It is understandable that the design of the flared mouth 82 allows the sand discharge pipe 81 to draw in a larger area of ​​sand and gravel, thus accelerating the sand discharge process.

[0040] In summary, by setting up multiple inclined plates 9 and utilizing the shallow sedimentation theory, the sedimentation distance of the sand and gravel is shortened, allowing more sand and gravel to settle and accumulate within the same time. Some of the sand and gravel form larger aggregates, which is more conducive to the sedimentation of the sand and gravel, thereby significantly improving the sand and gravel removal efficiency. Furthermore, through the components of the sand pushing component 7, the sand and gravel at the bottom of the pool can be pushed from one side of the inlet 2 into the sand collection pool 6. Then, the sand and gravel in the sand collection pool 6 are discharged through the sand removal component 8. This allows for the immediate collection and discharge of sand and gravel from the pool body 1, thereby further improving the sand and gravel removal efficiency.

[0041] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0042] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A grit chamber for wastewater treatment, characterized in that, include: The pool body has a cavity for storing water formed on its inner side, and the bottom of the pool body is conical; The inlet and outlet are both located on the upper part of the pool body and are connected to the cavity. Multiple inclined plates are arranged from top to bottom on both sides of the inner wall of the pool, and the inclined plates are inclined downward from the inner wall of the pool towards the middle. A sand collection tank is formed at the bottom of the inner side of the tank body, and the sand collection tank is connected to the cavity of the tank body; A sand-pushing assembly is used to push the sediment at the bottom of the cavity into the sand collection tank; A sand removal component is used to remove settled sand from the sand collection tank.

2. The sedimentation tank according to claim 1, characterized in that, The bottom inner side of the pool is sloping, and the slope is formed by the inner wall of the pool sloping downwards towards the sand collection pool.

3. The sedimentation tank according to claim 1, characterized in that, The angle between the inclined plate and the horizontal plane is greater than 30 degrees.

4. The sedimentation tank according to claim 1, characterized in that, The sand-pushing assembly includes a motor mounted on the outer wall of the pool body and a screw rod mounted on the output shaft of the motor. The screw rod is located at the bottom of the inner side of the pool body. When the motor is started, it drives the screw rod to rotate, thereby pushing the sediment at the bottom of the pool body into the sand collection tank.

5. The sedimentation tank according to claim 1, characterized in that, The sand removal assembly includes an air supply unit, a sand-water separator, an aeration pipe connected to the output end of the air supply unit, and a sand discharge pipe connected to the input end of the sand-water separator. The tail end of the sand discharge pipe extends into the sand collection tank, and the end of the aeration pipe extends from the tail end of the sand discharge pipe into the inside of the sand discharge pipe.

6. The sedimentation tank according to claim 5, characterized in that, The tail end of the sand discharge pipe is flared, and the bottom of the flared end is close to the bottom of the sand collection tank.

7. The sedimentation tank according to claim 5, characterized in that, The air supply unit is a blower or an air compressor.

8. The sedimentation tank according to claim 4, characterized in that, The bottom end face of the screw rod is in contact with the bottom of the inner side of the pool body.

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