Sedimentation tank

Abstract

The utility model relates to a sedimentation tank, which comprises: a housing forming an accommodating cavity for accommodating sewage; the first sliding wall is arranged in the accommodating cavity; the second sliding wall is arranged in the accommodating cavity; the sedimentation tank also comprises a mud bucket cover arranged between the first sliding wall and the second sliding wall; the distance between the first sliding wall and the second sliding wall is increased along the axial direction of the sedimentation tank; wherein the mud bucket cover comprises a first side wall and a second side wall, and the distance between the first side wall and the second side wall is reduced along the axial direction of the sedimentation tank; the sludge bucket cover is provided with one or more sludge settling openings, so that solid matters in the sewage are settled from one side of the sludge bucket cover to the other side of the sludge bucket cover through the sludge settling openings. According to the technical scheme, the settling speed of solids such as sludge is increased, and meanwhile, the influence of settled sludge on an upper-layer water body is reduced.

Description

Technical Field

[0001] This application relates to the field of wastewater treatment technology, and in particular to a sedimentation tank. Background Technology

[0002] Sedimentation tanks are essential structures in water purification processes. However, existing sedimentation tanks pose a risk of sludge returning to the water flow after settling at the bottom of the sludge hopper. Especially during sludge removal, the agitation of the water flow causes significant sludge dispersion, leading to incomplete removal and water turbidity. Furthermore, there are other technical problems such as sludge accumulation in the sedimentation tank, incomplete removal, and the large footprint of the sedimentation tank.

[0003] Chinese patent document CN 209646028 U discloses a vertical flow sedimentation tank, including a tank body. The tank body consists of a water collection zone, a filtration zone, a sedimentation zone, and a sludge collection zone from top to bottom. The water collection zone is connected to an external drain outlet. Wastewater from the sedimentation zone can enter the water collection zone through the filtration zone and be discharged through the drain outlet. The sedimentation zone is equipped with a guide pipe with an upward-facing outlet and a baffle plate located directly above the outlet of the guide pipe. The baffle plate is fixed to the guide pipe and has an umbrella-shaped structure with the tip of the baffle plate pointing downward. The sludge collection zone has a funnel-shaped structure and a sludge outlet at its bottom. Multiple aeration pipes are provided on the funnel-shaped sidewall of the sludge collection zone to flush away the sludge deposited on the sidewall.

[0004] However, this technical solution still suffers from the problem of sludge being returned to the water flow, resulting in incomplete sludge removal during the sludge discharge process and affecting the wastewater treatment effect of the sedimentation tank. Utility Model Content

[0005] This application provides a sedimentation tank that improves the wastewater treatment efficiency of the sedimentation tank, thereby at least partially solving the above-mentioned technical problems.

[0006] To achieve the above objectives, this application provides a sedimentation tank, comprising:

[0007] A housing that forms a containment cavity for sewage;

[0008] A first sliding wall is disposed within the receiving cavity;

[0009] A second sliding wall is disposed within the receiving cavity;

[0010] The sedimentation tank also includes:

[0011] A mud bucket cover is disposed between the first sliding wall and the second sliding wall;

[0012] The distance between the first sliding wall and the second sliding wall increases along the axial direction of the sedimentation tank;

[0013] The sludge hopper includes a first sidewall and a second sidewall, wherein the distance between the first sidewall and the second sidewall decreases along the axial direction of the sedimentation tank.

[0014] The sludge hopper is provided with one or more sludge inlets, so that solid matter in the sewage can settle from one side of the sludge hopper to the other side of the sludge hopper through the sludge inlets.

[0015] Optionally,

[0016] The first sliding wall and the second sliding wall are symmetrically arranged in the receiving cavity.

[0017] Optionally,

[0018] The first sliding wall and the second sliding wall are planar.

[0019] Optionally,

[0020] The first sliding wall is perpendicular to the second sliding wall.

[0021] Optionally,

[0022] The sedimentation port is at least located between the first sidewall and the first sliding wall, and the sedimentation port is at least located between the second sidewall and the second sliding wall.

[0023] Optionally,

[0024] The first sidewall is perpendicular to the first sliding wall, and the second sidewall is perpendicular to the second sliding wall.

[0025] Optionally,

[0026] The end of the first sidewall away from the first sliding wall is fixedly connected to the end of the second sidewall away from the second sliding wall.

[0027] Optionally,

[0028] The mud bucket cover also includes:

[0029] A plurality of fasteners, wherein a portion of the fasteners are connected at one end to the first sidewall and at the other end to the first sliding wall;

[0030] The other part of the fastener is connected at one end to the second side wall and at the other end to the second sliding wall.

[0031] Optionally,

[0032] The fixing components are evenly distributed, and the sedimentation port is located between the fixing components.

[0033] Optionally,

[0034] The sedimentation tank also includes:

[0035] A mud discharge pipe is at least partially disposed between the first sliding wall and the second sliding wall, and at least partially disposed between the first side wall and the second side wall.

[0036] In the sedimentation tank of this application embodiment, the above technical solution improves the settling speed of sludge and other solids, and avoids the impact of sludge and other solids on the water body above the sludge hopper hood caused by water fluctuations during the sludge discharge process.

[0037] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0040] Figure 1 This is a top view schematic diagram of a sedimentation tank provided in an exemplary embodiment of this disclosure;

[0041] Figure 2 This is a schematic diagram of the sedimentation tank structure provided in an exemplary embodiment of this disclosure;

[0042] Figure 3 This is another structural schematic diagram of the sedimentation tank structure provided in the exemplary embodiment of this disclosure;

[0043] Figure 4 This is another structural schematic diagram of the sedimentation tank structure provided in the exemplary embodiments of this disclosure;

[0044] Figure 5 This is another structural schematic diagram of the sedimentation tank structure provided in the exemplary embodiment of this disclosure;

[0045] Figure 6 This is another structural schematic diagram of the sedimentation tank structure provided in the exemplary embodiment of this disclosure;

[0046] Explanation of reference numerals in the attached figures:

[0047] 100. Sedimentation tank;

[0048] 110. Shell; 111. Shell sidewall; 112. Shell bottom wall; 113. Receiving cavity;

[0049] 121. First sliding wall; 122. Second sliding wall;

[0050] 130. Mud hopper cover; 131. First side wall; 132. Second side wall; 133. Sedimentation outlet; 134. Fixing component;

[0051] 140. Sludge discharge pipe; 141. Sludge discharge hole;

[0052] Z1, Axial direction. Detailed Implementation

[0053] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0054] Please refer to Figures 1 to 6 In some embodiments of this application, a sedimentation tank 100 is provided, including: a shell 110, a first sliding wall 121, a second sliding wall 122, a sludge hopper 130, and a sludge discharge pipe 140.

[0055] Reference Figure 1 and Figure 2 The shell 110 includes a shell side wall 111 and a shell bottom wall 112, which form a receiving cavity 113 for containing sewage, where the sewage is treated. A first sliding wall 121 and a second sliding wall 122 are disposed within the receiving cavity 113. The figure only schematically shows one set of first sliding walls 121 and second sliding walls 122. The number of first sliding walls 121 and second sliding walls 122 can be one or more, or one or more sets. For example, two sets of first sliding walls 121 and second sliding walls 122 can be combined to form a cubical funnel-shaped structure. A mud hopper cover 130 is disposed between the first sliding wall 121 and the second sliding wall 122. The mud hopper cover 130 can be fixedly connected to the shell 110 or to the first sliding wall 121 and the second sliding wall 122.

[0056] The first sliding wall 121 and the second sliding wall 122 form an opening that gradually increases in size along the axial direction Z1 of the sedimentation tank 100. Here, the axial direction Z1 of the sedimentation tank 100 refers to the direction from the bottom to the top of the sedimentation tank 100 when the sedimentation tank 100 is in normal use. In other words, along the axial direction Z1 of the sedimentation tank 100, the distance between the first sliding wall 121 and the second sliding wall 122 increases, so that the angle between the first sliding wall 121 and the second sliding wall 122 and the shell side wall 111 is less than 90°. The first side wall 131 and the second side wall 132 are inclined slopes relative to the shell side wall 111. During sewage treatment, the settling velocity of solids in sewage, such as sludge, on the first sliding wall 121 and the second sliding wall 122 is much greater than the settling velocity of sludge and other solids in water.

[0057] The sludge hopper 130 includes a first sidewall 131 and a second sidewall 132, wherein the distance between the first sidewall 131 and the second sidewall 132 decreases along the axial direction Z1 of the sedimentation tank 100. The first sidewall 131 and the second sidewall 132 form an "umbrella-like" structure, and the change in distance between the first sidewall 131 and the second sidewall 132 along the axial direction Z1 of the sedimentation tank 100 is opposite to the trend of the change in distance between the first sliding wall 121 and the second sliding wall 122 along the axial direction Z1 of the sedimentation tank 100. During wastewater treatment, the first sidewall 131 and the second sidewall 132 are also a pair of inclined surfaces, and when sludge and other sediments fall onto the first sidewall 131 and the second sidewall 132, the settling of sludge and other sediments is accelerated.

[0058] The sludge hopper 130 is also provided with one or more sludge inlets 133. When sludge falls into the first side wall 131 and the second side wall 132, the sludge will settle from one side of the sludge hopper 130 to the other side of the sludge hopper 130 along the sludge inlets 133. When the sedimentation tank 100 is in normal use, the sludge settles from the upper side of the sludge hopper 130 to the lower side of the sludge hopper 130.

[0059] The sedimentation tank 100 of this application, by setting a sludge hopper 130 between the first sliding wall 121 and the second sliding wall 122, and through the "umbrella-like" structure of the sludge hopper 130, generates water ripples during the sludge discharge process through the sludge discharge pipe 140. Even if the sludge is agitated, the settled sludge remains between the first sliding wall 121, the second sliding wall 122, and the sludge hopper 130, and can be completely discharged. In addition, the sludge hopper 130 is provided with a sludge outlet 133. During sludge discharge, the water flow velocity at the sludge outlet is relatively high, which can prevent the bottom sludge from rolling and spreading to the upper side of the sludge hopper 130, and can also carry away the sludge deposited on the surface of the sludge hopper 130.

[0060] Reference Figure 2As shown, in some embodiments of this application, the first sliding wall 121 and the second sliding wall 122 are symmetrically arranged in the receiving cavity 113. The first sliding wall 121 and the second sliding wall 122 form an opening that is wider at the top and narrower at the bottom. Sludge and other solids settle from the upper side of the first sliding wall 121 and the second sliding wall 122 along the lower side of the first sliding wall 121 and the second sliding wall 122, so that the sludge and other solids are concentrated on the lower side of the sedimentation tank 100. Due to the symmetrical arrangement of the first sliding wall 121 and the second sliding wall 122, the settling of sludge and other solids on the first sliding wall 121 and the second sliding wall 122 is basically the same, thereby ensuring more thorough sludge removal in the subsequent sludge removal process.

[0061] In some embodiments of this application, the first sliding wall 121 and the second sliding wall 122 are planar structures, as shown in the reference. Figure 3 and Figure 4 As shown, compared to the curved structure of the first sliding wall 121 and the second sliding wall 122, the planar structure causes the sludge to slide down the surfaces of the first sliding wall 121 and the second sliding wall 122 with a near-uniform acceleration. This increases the settling velocity of sludge and other solids.

[0062] Reference Figure 2 As shown, in some embodiments of this application, the first sliding wall 121 is perpendicular to the second sliding wall 122. In other words, the angle between the first sliding wall 121 and the straight line containing the axial direction Z1 of the sedimentation tank 100 is 45°, and the angle between the second sliding wall 122 and the straight line containing the axial direction Z1 of the sedimentation tank 100 is 45°. The structure of the first sliding wall 121 and the second sliding wall 122 being perpendicular further ensures that sludge and other sediments settle uniformly on the first sliding wall 121 and the second sliding wall 122, thereby increasing the settling velocity of sludge and other solids.

[0063] Reference Figure 5As shown, in some embodiments of this application, the sludge inlet 133 is disposed between the first side wall 131 and the first sliding wall 121, and between the second side wall 132 and the second sliding wall 122. That is, when the sludge hopper cover 130 is fixedly connected to the first sliding wall 121 and the second sliding wall 122, the sludge inlet 133 is disposed at the connection between the sludge hopper cover 130 and the first sliding wall 121 and the second sliding wall 122. The sludge inlet is disposed here so that the sludge settling along the first sliding wall 121 and the second sliding wall 122 can be collected on the lower side of the sludge hopper cover 130, and the sludge settling along the sludge hopper cover 130 can be concentrated on the lower side of the sludge hopper cover 130. This ensures that during sludge discharge, the sludge cannot overflow the sludge hopper 130. Even if a small amount of sludge churns at the settling port 133, it can quickly settle down through the first sliding wall 121 and the second sliding wall 122, ensuring that the settled sludge remains between the first sliding wall 121, the second sliding wall 122, and the sludge hopper 130 and can be completely discharged. Furthermore, the small cross-sectional area of ​​the settling port 133 allows for a higher water flow velocity during sludge discharge, preventing the bottom sludge from churning and spreading while also carrying away the sludge deposited on the surface of the first sliding wall 121, the second sliding wall 122, and the sludge hopper 130.

[0064] Reference Figure 5 As shown, in some embodiments of this application, the first sidewall 131 is perpendicular to the first sliding wall 121, and the second sidewall 132 is perpendicular to the second sliding wall 122. On the one hand, this ensures that the sludge settles into the sludge hopper 130 and slides down at a uniform and accelerated speed. On the other hand, the first sliding wall 121, the second sliding wall 122, and the sludge hopper 130 together form a cubic space to concentrate solids such as sludge and prevent sludge from escaping out of this three-dimensional space and contaminating the water on the upper side of the sludge hopper 130.

[0065] Reference Figure 5 As shown, in some embodiments of this application, the end of the first sidewall 131 away from the first sliding wall 121 is fixedly connected to the end of the second sidewall 132 away from the second sliding wall 122, that is, the upper side of the mud hopper cover 130 forms a closed structure, referring to... Figure 6 Compared to the non-enclosed structure on the upper side of the mud hopper 130, this design prevents the turbulent sludge from overflowing from the upper side of the mud hopper 130 during sludge discharge, thus avoiding contamination of the water body above the mud hopper 130.

[0066] Reference Figure 5 As shown, in some embodiments of this application, the mud hopper cover 130 further includes several fixing members 134. One end of a portion of the fixing members 134 is connected to the first side wall 131, and the other end is connected to the first sliding wall 121; another portion of the fixing members 134 is connected to the second side wall 132, and the other end is connected to the second sliding wall 122. The fixing members 134 are evenly distributed so that the mud settling openings 133 are also evenly distributed between the mud hopper cover 130 and the first sliding wall 121 and the second sliding wall 122.

[0067] Reference Figure 1 and Figure 5 As shown, in some embodiments of this application, the sludge discharge pipe 140 is at least partially disposed between the first side wall 131 and the second side wall 132, and also between the first sliding wall 121 and the second sliding wall 122. The sludge discharge pipe 140 is at least partially located within the space enclosed by the sludge hopper cover 130, the first sliding wall 121, and the second sliding wall 122. The portion of the sludge discharge pipe 140 located within this enclosed space has several sludge discharge holes 141, allowing the settled sludge to enter the interior of the sludge discharge pipe 140 through the sludge discharge holes 141, thereby discharging the sludge out of the sedimentation tank 100 through the sludge discharge pipe 140.

[0068] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0069] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0070] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0071] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A sedimentation tank, comprising: A housing that forms a containment cavity for sewage; A first sliding wall is disposed within the receiving cavity; A second sliding wall is disposed within the receiving cavity; Its features are, The sedimentation tank also includes: A mud bucket cover is disposed between the first sliding wall and the second sliding wall; The distance between the first sliding wall and the second sliding wall increases along the axial direction of the sedimentation tank; The sludge hopper includes a first sidewall and a second sidewall, wherein the distance between the first sidewall and the second sidewall decreases along the axial direction of the sedimentation tank. The first sidewall is perpendicular to the first sliding wall, and the second sidewall is perpendicular to the second sliding wall; The sludge hopper is provided with one or more sludge inlets, so that solid matter in the sewage can settle from one side of the sludge hopper to the other side of the sludge hopper through the sludge inlets; The sedimentation tank also includes: A mud discharge pipe is at least partially disposed between the first sliding wall and the second sliding wall, and at least partially disposed between the first side wall and the second side wall.

2. The sedimentation tank according to claim 1, characterized in that, The first sliding wall and the second sliding wall are symmetrically arranged in the receiving cavity.

3. The sedimentation tank according to claim 2, characterized in that, The first sliding wall and the second sliding wall are planar.

4. The sedimentation tank according to claim 3, characterized in that, The first sliding wall is perpendicular to the second sliding wall.

5. The sedimentation tank according to any one of claims 1 to 4, characterized in that, The sedimentation port is at least located between the first sidewall and the first sliding wall, and the sedimentation port is at least located between the second sidewall and the second sliding wall.

6. The sedimentation tank according to claim 5, characterized in that, The end of the first sidewall away from the first sliding wall is fixedly connected to the end of the second sidewall away from the second sliding wall.

7. The sedimentation tank according to claim 5, characterized in that, The mud bucket cover also includes: A plurality of fasteners, wherein a portion of the fasteners are connected at one end to the first sidewall and at the other end to the first sliding wall; The other part of the fastener is connected at one end to the second side wall and at the other end to the second sliding wall.

8. The sedimentation tank according to claim 7, characterized in that, The fixing components are evenly distributed, and the sedimentation port is located between the fixing components.

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