High-efficiency solid-liquid separation short-duration hydraulic retention septic tank

Abstract

The utility model relates to a short-duration hydraulic retention septic tank for efficient solid-liquid separation, which comprises a water inlet pipe, a water outlet pipe, a primary settling zone, a secondary settling zone and a partition wall, and the water inlet pipe penetrates through the top wall of the septic tank and then is suspended above the primary settling zone; partition walls are arranged on the edge of the primary settling area. The partition wall is of a cylindrical structure with an open top, and the bottom of the partition wall is fixedly connected with the bottom of the septic tank; a secondary settling zone is arranged between the outer wall of the partition wall and the inner wall of the septic tank; a water outlet pipe is arranged on the inner wall of the septic tank on one side of the upper part of the secondary settling zone. According to the utility model, the overall uniform water distribution is realized, the solid-liquid separation efficiency is improved, and the BOD5 concentration of sewage entering a plant is improved; the volume of the septic tank body is reduced, and the engineering investment is reduced; the septic tank can be assembled, and the site construction period is shortened.

Description

TECHNICAL FIELD

[0001] The utility model relates to the septic tank technical field, and specifically relates to short duration hydraulic retention septic tank of high -efficient solid -liquid separation. BACKGROUND

[0002] Septic tank is the equipment that handles excrement and filters and deposits. Its principle is that solidified objects are decomposed at the bottom of the tank, and the hydrated objects in the upper layer flow into the pipeline, preventing pipeline blockage and providing sufficient time for hydrolysis of solidified objects. The main functions include anaerobic putrefaction to kill mosquito eggs, temporary storage of sludge and anaerobic digestion of sludge, and sedimentation of impurities to avoid downstream pipe network accumulation. It is widely used in various domestic sewage unit sources.

[0003] The defects of the prior art are:

[0004] 1. Because the septic tank of the prior art has poor water inlet and outlet conditions, low solid-liquid separation efficiency and long hydraulic retention time, the volume of the septic tank is large.

[0005] 2. Because the septic tank of the prior art has high degradation rates of BOD5 and COD under anaerobic conditions, but low degradation rate of TN, the C / N ratio is reduced, which is not conducive to biochemical treatment in sewage plants, resulting in low efficiency of the sewage system. SUMMARY

[0006] The utility model provides short duration hydraulic retention septic tank of high -efficient solid -liquid separation aiming at above -mentioned problem, its purpose lies in realizing whole even water distribution, improving solid -liquid separation efficiency, promoting sewage plant BOD5 concentration, reducing septic tank pool volume, reducing engineering investment, realizing septic tank assembly, saving on -site construction period.

[0007] To solve the above problems, the utility model provides the technical scheme:

[0008] The short duration hydraulic retention septic tank of high -efficient solid -liquid separation includes water inlet pipe, water outlet pipe, primary settling zone, secondary sedimentation zone and partition wall, wherein:

[0009] The water inlet pipe penetrates the top wall of the septic tank and is suspended above the primary settling zone;

[0010] The partition wall is arranged at the edge of the primary settling zone;

[0011] The partition wall is a cylindrical structure with an open top, and its bottom is fixedly connected to the bottom of the septic tank. The secondary sedimentation zone is arranged between the outer wall of the partition wall and the inner wall of the septic tank;

[0012] The water outlet pipe is arranged on one side of the inner wall of the septic tank above the secondary sedimentation zone.

[0013] Preferably, the water inlet pipe is suspended at the vertical center of the primary sedimentation zone;

[0014] The water inlet pipe is provided with an upwardly expanding opening structure at the bottom of the water inlet pipe.

[0015] Preferably, a reflection plate for guiding the upward flow of water is arranged below the water inlet pipe; the reflection plate is fixedly connected with the water inlet pipe through a connecting piece.

[0016] Preferably, the lower part of the partition wall is uniformly surrounded by a sludge sedimentation area communication hole for communicating the bottom sludge of the primary sedimentation zone and the secondary sedimentation zone.

[0017] Preferably, the upper part of the partition wall is uniformly surrounded by a water distribution hole for secondary water distribution of the primary sedimentation zone to the secondary sedimentation zone.

[0018] Preferably, the top of the secondary sedimentation zone is surrounded by a water outlet groove; the bottom of the water outlet groove is fixedly connected with the inner wall of the septic tank and communicates with the water outlet pipe; the top of the water outlet groove is lower than the top of the partition wall.

[0019] Preferably, the top of the water outlet groove is surrounded by a triangular weir plate for removing suspended solids in sewage.

[0020] Preferably, an air vent is arranged on the tank cover at the top of the septic tank.

[0021] Preferably, a maintenance opening is arranged on one side of the connection between the tank cover and the top of the septic tank.

[0022] Compared with the prior art, the present application has the following advantages:

[0023] 1. The primary sedimentation zone of the present application adopts a gradually expanding central water inlet pipe, which uniformly distributes water from the center to the periphery after water inlet, and the secondary sedimentation zone uniformly distributes water from the primary sedimentation zone to the secondary sedimentation zone through uniform holes in the partition wall, thereby achieving overall uniform water distribution.

[0024] 2. The present application adopts a two-stage sedimentation process, which improves the solid-liquid separation efficiency in terms of uniform water distribution and uniform water outlet, and in addition, the primary sedimentation zone separates scum, sewage and sludge, and the secondary sedimentation zone performs deep solid-liquid separation on the primary separated sewage, thereby improving the solid-liquid separation efficiency.

[0025] 3. The present application has high solid-liquid separation efficiency, which shortens the hydraulic retention time under the premise of ensuring the solid-liquid separation effect, thereby reducing the degradation rate of BOD5, improving the biodegradability of sewage, and being conducive to improving the BOD5 concentration of sewage entering the plant.

[0026] 4. Due to the sewage interval volume of the septic tank being reduced under the same water inlet standard, the volume of the septic tank body can be reduced, and the engineering investment is reduced.

[0027] 5. Due to the septic tank of different sizes being determined according to different water inlet amounts, the septic tank can be assembled, and the on-site construction period is saved. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a sectional view of the septic tank of the embodiment of the utility model;

[0029] Figure 2 is a plan view of the septic tank of the embodiment of the utility model.

[0030] Wherein: 100. water inlet pipe, 200. water outlet pipe, 300. primary sedimentation zone, 400. secondary sedimentation zone, 500. partition wall, 600. reflecting plate, 700. tank cover, 110. water inlet pipe opening, 410. water outlet groove, 411. triangular weir plate, 510. sedimentation zone communication hole, 520. water distribution hole, 710. air hole, 720. inspection hole DETAILED DESCRIPTION

[0031] The utility model will be further illustrated in combination with specific embodiments, and it should be understood that these embodiments are only used for illustrating the utility model and are not used for limiting the scope of the utility model, and after reading the utility model, various equivalent modifications of the utility model made by those skilled in the art all fall within the scope defined by the claims attached to the present application.

[0032] As shown in Figure 1 Efficient short duration hydraulic retention septic tank, comprising water inlet pipe 100, water outlet pipe 200, primary sedimentation zone 300, secondary sedimentation zone 400, partition wall 500, wherein:

[0033] The water inlet pipe 100 penetrates the top wall of the septic tank and is suspended above the primary sedimentation zone 300.

[0034] The primary sedimentation zone 300 is provided with a partition wall 500.

[0035] The partition wall 500 is a cylindrical structure with an open top, and its bottom is fixedly connected to the bottom of the septic tank; the secondary sedimentation zone 400 is arranged between the outer wall of the partition wall 500 and the inner wall of the septic tank.

[0036] The water outlet pipe 200 is arranged at the inner wall of the septic tank on one side of the upper part of the secondary sedimentation zone 400.

[0037] It needs to be explained that the present utility model divides the septic tank into two sedimentation zones, and integrates the features of the two kinds of sedimentation tanks of the week-in and week-out and the middle-in and week-out, and optimizes the water inlet of the traditional septic tank from the single side fixed pipe inlet to the center water inlet.

[0038] It needs to be further explained that the water inlet pipe 100 is suspended at the center of the vertical direction of the primary sedimentation zone 300.

[0039] The water inlet pipe 100 is provided with an opening structure expanding from top to bottom at the bottom of the water inlet pipe 100.

[0040] It needs to be further explained that the lower part of the water inlet pipe 100 is provided with a reflection plate 600 for guiding the upward flow of the water inlet, avoiding the disturbance of the bottom sediment; the reflection plate 600 is fixedly connected with the water inlet pipe 100 through a connecting piece.

[0041] It needs to be explained that the lower part of the partition wall 500 is uniformly arranged with a sediment zone communication hole 510 for communicating the bottom sediment of the primary sedimentation zone 300 and the secondary sedimentation zone 400, facilitating the effective use of the volume of the lower sediment zone and the regular cleaning of the pollution.

[0042] It needs to be further explained that the upper part of the partition wall 500 is uniformly arranged with a water distribution hole 520 for the secondary water distribution of the primary sedimentation zone 300 to the secondary sedimentation zone 400.

[0043] It needs to be further explained that the partition wall 500 can keep the scum in the primary sedimentation zone 300, avoiding the influence on the sedimentation and water outlet of the secondary sedimentation zone 400.

[0044] It needs to be explained that the top of the secondary sedimentation zone 400 is provided with a water outlet groove 410; the bottom of the water outlet groove 410 is fixedly connected with the inner wall of the septic tank and is communicated with the water outlet pipe 200; the top of the water outlet groove 410 is lower than the top of the partition wall 500.

[0045] It needs to be explained that the top of the water outlet groove 410 is provided with a triangular weir plate 411 for uniformly and efficiently removing the suspended solids in the sewage, and the overflowed water is discharged from the triangular weir plate 411 after the secondary sedimentation in the secondary sedimentation zone 400.

[0046] As shown in Figure 2 It needs to be explained that the top of the septic tank is provided with a vent hole 710.

[0047] It needs to be further explained that one side of the connection between the tank cover 700 and the top of the septic tank is provided with an inspection hole 720.

[0048] In the detailed description above, various features are grouped together in single embodiments for the purpose of streamlining the disclosure. This method of disclosure, however, is not to be interpreted as reflecting a necessity to more features than are expressly recited in each claim. Rather, inventive functionality is identified and described in terms of the best embodiments. Accordingly, the claims are not limited to the inventive concepts described herein, but are to be accorded their fullest scope consistent with the patent laws subject to any amendments to the patent laws after the time of the implantation herewith.

[0049] The disclosed embodiments herein can be described with respect to the following clauses:

[0050] The above description includes one or more examples of the embodiments. Of course, not all possible combinations of components or methods described above will be described, but one of ordinary skill in the art will recognize that further combinations and permutations of the embodiments described herein are possible. Accordingly, the embodiments described herein are intended to embrace all such alterations, modifications and variations going to the full scope of the appended claims. Additionally, description of a term in the specification or claims that it is used in association with the term "comprising", also can be construed as also being used in association with the term "including" and vice versa, as the terms are used interpretively in their broadest sense consistent with the term as used in the patent laws unless specifically indicated. Further, the use of any term "or" in the specification or claims is intended to encompass both "and" and "or" unless specifically indicated otherwise.

[0051] The above detailed description has shown, described and pointed out the aspects of the application in connection with the illustrative embodiments. It will be understood that various modifications can be made to the illustrative embodiments, and other embodiments can be used, without departing from the spirit and scope of the application. The disclosures of this patent application are believed to be applicable to various embodiments of the application and to any alternatives, modifications or equivalents thereof. Accordingly, the application is intended to embrace all such alternatives, modifications and equivalents that fall within the spirit and scope of the appended claims.

Claims

1. A short hydraulic retention time septic tank with high efficiency solid-liquid separation, characterized in that: It comprises a water inlet pipe (100), a water outlet pipe (200), a primary sedimentation area (300), a secondary sedimentation area (400), and a partition wall (500), wherein: The water inlet pipe (100) passes through the top wall of the septic tank and is suspended above the primary sedimentation area (300); The partition wall (500) is provided at the edge of the primary settling area (300); The partition wall (500) is a cylindrical structure with an open top, and its bottom is fixedly connected to the bottom of the septic tank; the secondary sedimentation area (400) is provided between the outer wall of the partition wall (500) and the inner wall of the septic tank; The outlet pipe (200) is provided on the inner wall of the septic tank on the upper side of the secondary sedimentation area (400).

2. The short-cycled hydraulically retained septic tank with high efficiency of solid-liquid separation according to claim 1, characterized in that: The water inlet pipe (100) is suspended at the vertical center of the primary settling area (300); The water inlet pipe opening (110) at the bottom of the water inlet pipe (100) is provided with an opening structure that gradually expands from top to bottom.

3. The short-cycled hydraulically retained septic tank with high efficiency of solid-liquid separation according to claim 2, characterized in that: A reflective plate (600) for guiding the incoming water to flow upward is provided below the water inlet pipe opening (110); the reflective plate (600) is fixedly connected to the water inlet pipe opening (110) via a connecting piece.

4. The short-cycled hydraulically retained septic tank with high efficiency of solid-liquid separation according to claim 3, characterized in that: Sludge zone communication holes (510) for communicating the bottom sludge of the primary sedimentation zone (300) and the secondary sedimentation zone (400) are evenly arranged around the lower portion of the partition wall (500).

5. The short-cycled hydraulically retained septic tank with high efficiency of solid-liquid separation according to claim 4, characterized in that: Water distribution holes (520) for secondary water distribution from the primary sedimentation area (300) to the secondary sedimentation area (400) are evenly arranged around the upper part of the partition wall (500).

6. The short-cycled hydraulically retained septic tank with high efficiency of solid-liquid separation according to claim 5, characterized in that: A water outlet trough (410) is provided around the top of the secondary sedimentation area (400); the bottom of the water outlet trough (410) is fixedly connected to the inner wall of the septic tank and is connected to the water outlet pipe (200); the top of the water outlet trough (410) is lower than the top of the partition wall (500).

7. The short-cycled hydraulically retained septic tank with high efficiency of solid-liquid separation according to claim 6, characterized in that: A triangular weir plate (411) is provided around the top of the outlet trough (410) for removing suspended matter from sewage.

8. The short-cycles high-efficiency solid-liquid separation hydraulic retention septic tank according to claim 7, characterized in that: A vent hole (710) is provided on the tank cover (700) at the top of the septic tank.

9. The short-cycles high-efficiency solid-liquid separation hydraulic retention septic tank according to claim 8, characterized in that: An inspection port (720) is provided on one side of the connection between the tank cover (700) and the top of the septic tank.

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