A water decanter for sewage treatment biochemical tank

Abstract

This utility model belongs to the field of wastewater treatment technology, specifically a decanter for a wastewater treatment biological treatment tank. It includes a water guiding component that continuously discharges the supernatant from the reaction tank during the drainage stage. One side of the water guiding component is equipped with an adjustment component that changes the decanting depth, and the other side is equipped with a decanting component that prevents excessive scum from entering the water guiding component without requiring frequent maintenance or cleaning. This utility model facilitates multiple scum blocking by placing a low-height inlet component within a floating frame located above the inlet end of the guide pipe, and then placing a baffle between the guide pipe and the floating frame that can be disturbed by water and air flow. This ensures that surface scum is kept away from the inlet component by the floating frame and float, while submerged scum is prevented from approaching the inlet component due to the non-adhesive baffle. Thus, while maintaining decanting efficiency, the maintenance and cleaning frequency of the decanter is significantly reduced, achieving long-term stable operation.

Description

Technical Field

[0001] This utility model belongs to the field of sewage treatment technology, specifically relating to a decanter for a sewage treatment biochemical tank. Background Technology

[0002] A decanter is essentially a floating, liftable weir or drainage device installed at the end of a biochemical reaction tank. Its core function is to descend synchronously and smoothly with the water level in the tank during the drainage phase, always discharging only the clarified liquid from the upper layer of the reaction tank, while avoiding disturbance or discharge of the activated sludge flocs in the lower layer.

[0003] Chinese patent document CN222204941U discloses a decanter for a biological wastewater treatment tank. It uses a cleaning mechanism consisting of a collection box and a motor-driven scraper, which is installed at the water inlet of the decanter, to scrape the scum accumulated on the filter components during the decanting process into the collection box. This prevents the scum on the surface of the tank from clogging the filter components and causing poor water flow from the decanter during long-term use.

[0004] However, in the existing technology, when the decanter is running for a long time, although the cleaning mechanism can ensure normal water output, it significantly increases the cost and frequency of maintenance and cleaning, and will scrape off some of the scum, making it easier for it to enter the decanter. Therefore, a decanter for a biological treatment tank in sewage treatment is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a decanter for a wastewater treatment biochemical tank.

[0006] The technical solution adopted in this utility model is as follows:

[0007] A decanter for a wastewater treatment biochemical tank includes a water guiding component that can continuously discharge the supernatant in the tank during the drainage stage of the reaction tank. An adjustment component that can change the decanting depth of the decanter is provided on one side of the water guiding component, and a decanting component that can prevent excessive scum from entering the water guiding component without frequent maintenance and cleaning is provided on the other side of the water guiding component.

[0008] The water guiding assembly includes multiple guide tubes;

[0009] The decanting assembly includes a loading component that can be raised and lowered with the water inlet end of the guide pipe, a filter component that can intercept scum in different ways, and a water inlet component that can continuously introduce the supernatant in the pool into the guide pipe;

[0010] The loading components include a floating frame positioned above the water inlet end of the guide pipe;

[0011] The filter element includes a baffle net set between the outer surfaces of the guide pipe and the floating frame. A hoop is fitted on the guide pipe, a cylinder frame is fixedly connected to the floating frame, multiple buckles are fixedly connected to both sides of the cylinder frame, and a float is fixedly installed between the cylinder frame and the buckles.

[0012] Preferably, the loading component also includes a sleeve frame fixedly connected between the outer sides of the water inlet ends of multiple guide pipes, with telescopic rods movably connected to the front and rear of the sleeve frame, and a floating frame movably connected between the upper ends of the two telescopic rods.

[0013] Preferably, the water inlet component includes a water inlet chamber fixedly installed in the floating frame, a corrugated pipe fixedly connected between the water inlet chamber and the guide pipe, and a filter cover fixedly connected above the water inlet chamber.

[0014] Preferably, the hoop is a symmetrical double-body structure, with the hoop pressing and fixing the lower edge of the baffle to the outer side of the guide pipe, and the cylinder frame pressing and fixing the upper edge of the baffle to the outer side of the floating frame.

[0015] Preferably, both the mounting frame and the floating frame are rotatably connected to the telescopic rod.

[0016] Preferably, the upper side of the water inlet chamber is lower than the upper side of the floating frame.

[0017] The beneficial effects of this utility model are as follows: By setting a low-height water inlet in a floating frame located above the water inlet end of the guide pipe, and then setting a baffle that can be disturbed by water flow and air flow between the guide pipe and the floating frame, multiple slag blocking is achieved. The floating frame and float are kept away from the water inlet due to the floating frame and float, while the slag under the liquid cannot approach the water inlet due to the baffle that is not easy to adhere to. Thus, while ensuring the decanting effect, the maintenance and cleaning frequency of this decanter is significantly reduced, and long-term stable operation is achieved. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the following detailed description to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0019] Figure 1 This is a schematic diagram of the structure of a decanter for a wastewater treatment biochemical tank according to the present invention;

[0020] Figure 2 This is a schematic diagram of the main structure of a decanter for a wastewater treatment biochemical tank according to the present invention;

[0021] Figure 3 yes Figure 1 Another perspective structural diagram;

[0022] Figure 4 yes Figure 3Schematic diagram of some component structures;

[0023] Figure 5 yes Figure 1 Schematic diagram of some component structures;

[0024] Figure 6 yes Figure 1 A cross-sectional structural diagram of some components.

[0025] The annotations in the attached figures are explained as follows:

[0026] 1. Water guiding assembly; 101. Outlet pipe; 102. Rotary joint; 103. Manifold; 104. Guide pipe; 2. Adjustment assembly; 201. Fastening frame; 202. Hydraulic cylinder; 203. Support; 3. Decanting assembly; 301. Sleeve frame; 302. Telescopic rod; 303. Floating frame; 304. Baffle net; 305. Hoop frame; 306. Cylindrical frame; 307. Cover; 308. Float; 309. Inlet chamber; 310. Corrugated pipe; 311. Filter cover. Detailed Implementation

[0027] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of 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.

[0029] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0030] like Figures 1-6 As shown, a decanter for a wastewater treatment biochemical tank includes a water guiding component 1 that can continuously discharge the supernatant in the tank during the drainage stage of the reaction tank. An adjusting component 2 is provided on one side of the water guiding component 1 to change the decanting depth of the decanter. A decanting component 3 is provided on the other side of the water guiding component 1 to prevent excessive scum from entering the water guiding component 1 without frequent maintenance and cleaning.

[0031] In this embodiment: the water guiding component 1 includes an outflow pipe 101, and a rotary joint 102 is fixedly connected to the front and rear of the outflow pipe 101. A manifold 103 is fixedly connected to the side of the rotary joint 102 away from the outflow pipe 101, and a guide pipe 104 is fixedly connected to the outer surface of the manifold 103.

[0032] The supernatant from the biochemical tank that enters the guide pipe 104 through the decanting component 3 can flow into the manifold 103, and then through the rotary joint 102 and the outflow pipe 101 into the biochemical tank. The rotary joint 102 allows the manifold 103 and the guide pipe 104 to rotate relative to the outflow pipe 101 under the action of the adjusting component 2, but this does not affect the smooth flow of the supernatant outflow channel in the water guiding component 1.

[0033] In this embodiment: the adjustment component 2 includes a fastening frame 201 disposed between the guide pipes 104, a hydraulic cylinder 202 is movably connected to one side of the fastening frame 201, and a support 203 is movably connected to the end of the hydraulic cylinder 202 away from the fastening frame 201.

[0034] The hydraulic cylinder 202 is installed on the support 203 set outside the biological tank. The length change of the extension end of the hydraulic cylinder 202 is transmitted to the guide pipe 104 through the fastening frame 201. This allows the guide pipe 104 to rotate around the axis of the rotary joint 102 together with the manifold 103 when the hydraulic cylinder 202 is running, so as to change the height of the decanting component 3 in the biological tank according to the decanting needs.

[0035] In this embodiment: the decanting component 3 includes a loading component that can be raised and lowered with the water inlet end of the guide pipe 104, a filter component that can intercept scum in different ways, and a water inlet component that can continuously introduce the supernatant in the pool into the guide pipe 104.

[0036] The loading component includes a floating frame 303 disposed above the water inlet end of the guide pipe 104; the filter component includes a baffle 304 disposed between the outer surfaces of the guide pipe 104 and the floating frame 303; a hoop 305 is sleeved on the guide pipe 104; a cylindrical frame 306 is fixedly connected to the floating frame 303; multiple covers 307 are fixedly connected to both sides of the cylindrical frame 306; a float 308 is fixedly installed between the cylindrical frame 306 and the covers 307; the loading component also includes a sleeve frame 301 fixedly connected between the outer surfaces of the water inlet ends of multiple guide pipes 104; telescopic rods 302 are movably connected to the front and rear of the sleeve frame 301; the floating frame 303 is movably connected between the upper ends of the two telescopic rods 302; the water inlet component includes a water inlet chamber 309 fixedly installed inside the floating frame 303; a corrugated pipe 310 is fixedly connected between the water inlet chamber 309 and the guide pipe 104; and a filter cover 311 is fixedly connected above the water inlet chamber 309.

[0037] The hoop 305 is a symmetrical double-body structure. The hoop 305 presses and fixes the lower edge of the baffle 304 to the outer side of the guide pipe 104. The cylinder frame 306 presses and fixes the upper edge of the baffle 304 to the outer side of the floating frame 303. The sleeve frame 301 and the floating frame 303 are rotatably connected to the telescopic rod 302. The upper side of the water inlet 309 is lower than the upper side of the floating frame 303.

[0038] The height change of the inlet end of the guide pipe 104 is transmitted to the decanting assembly 3 through the sleeve frame 301. The telescopic rod 302, which has a tendency to extend when not under external force, allows the floating frame 303, which is used to install components such as the cylinder frame 306 and the inlet chamber 309, to rise and fall a certain distance relative to the sleeve frame 301. The clamp 305 allows the lower end of the baffle 304 to be stably sleeved on the outer surface of the guide pipe 104. The cylinder frame 306 cooperates with the floating frame 303 to clamp and fix the upper end of the baffle 304. The cylinder frame 306 can also cooperate with the cover 307 to install the float 308 with greater buoyancy. The supernatant from the biological tank that enters the decanting assembly 3 through the inlet chamber 309 is introduced into the guide pipe 104 through the corrugated pipe 310. The supernatant entering the inlet chamber 309 is further filtered through the filter cover 311 with an arc-shaped outer surface.

[0039] Working Principle: When this decanter is installed and used to discharge the supernatant from the biological treatment tank of sewage, while the hydraulic cylinder 202 is working to adjust the height of the inlet end of the guide pipe 104 in the tank, the sleeve frame 301 can pull the floating frame 303 through the telescopic rod 302, allowing the floating frame 303 to descend as the liquid level in the tank decreases. When the height of the inlet end of the guide pipe 104 below the liquid level in the tank is not too low, the floating frame 303 will float at the liquid level due to the buoyancy of the float 308. The scum floating on the surface of the pool will be blocked by the float 308 and the floating frame 303 in sequence, and will not be able to move into the inlet chamber 309 inside the floating frame 303. Since the inlet chamber 309 is located below the liquid surface and inside the baffle 304 which is fully fixed at both the upper and lower ends, the supernatant below the liquid surface in the pool can only enter the inlet chamber 309 after passing through the double filtration of the baffle 304 and the filter cover 311. This setting can ensure that the scum concentration of the water discharged from this decanter meets the standard.

[0040] In addition, when the height of the inlet end of the guide pipe 104 gradually approaches the height of the activated sludge in the tank, the extension rod 302 enables the floating frame 303 to remain stably floating on the liquid surface due to the buoyancy of the float 308 when the height of the inlet end of the guide pipe 104 no longer decreases. Based on this, the decanter can fully discharge the supernatant in the tank, and the float 308 and the floating frame 303 can continuously play the role of blocking the scum on the liquid surface.

[0041] The scum adhering to the surface of the baffle 304 can be dislodged during the aeration stage of the biological treatment tank due to the disturbance of water flow and gas. The scum accumulating on the surface of the filter cover 311 can be cleaned by the staff periodically removing the filter cover 311.

[0042] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A decanter for a wastewater treatment biological treatment tank, characterized in that: It includes a water guiding component (1) that can continuously discharge the supernatant in the reaction tank during the drainage stage. An adjustment component (2) is provided on one side of the water guiding component (1) to change the decanting depth of the decanter. A decanting component (3) is provided on the other side of the water guiding component (1) to prevent excessive scum from entering the water guiding component (1) without frequent maintenance and cleaning. The water guiding component (1) includes a plurality of guide pipes (104); The decanting assembly (3) includes a loading component that can be raised and lowered with the water inlet end of the guide pipe (104), a filter component that can intercept scum in different ways, and a water inlet component that can continuously introduce the supernatant in the pool into the guide pipe (104). The loading component includes a floating frame (303) disposed above the water inlet end of the guide pipe (104). The filter element includes a baffle (304) disposed between the outer sides of the guide pipe (104) and the floating frame (303), a hoop (305) sleeved on the guide pipe (104), a cylindrical frame (306) fixedly connected to the floating frame (303), a plurality of buckles (307) fixedly connected to both sides of the cylindrical frame (306), and a float (308) fixedly installed between the cylindrical frame (306) and the buckles (307).

2. A decanter for a wastewater treatment biological treatment tank according to claim 1, characterized in that: The loading component also includes a sleeve (301) fixedly connected between the outer sides of the water inlet ends of the plurality of guide pipes (104). The sleeve (301) is movably connected to the front and rear of the sleeve (301), and the floating frame (303) is movably connected between the upper ends of the two telescopic rods (302).

3. A decanter for a wastewater treatment biological treatment tank according to claim 2, characterized in that: The water inlet component includes a water inlet chamber (309) fixedly installed in the floating frame (303), a corrugated pipe (310) fixedly connected between the water inlet chamber (309) and the guide pipe (104), and a filter cover (311) fixedly connected above the water inlet chamber (309).

4. A decanter for a wastewater treatment biological treatment tank according to claim 1, characterized in that: The hoop (305) is a symmetrical double-body structure. The hoop (305) presses and fixes the lower edge of the baffle (304) on the outer side of the guide pipe (104). The cylinder frame (306) presses and fixes the upper edge of the baffle (304) on the outer side of the floating frame (303).

5. A decanter for a wastewater treatment biological treatment tank according to claim 2, characterized in that: The sleeve frame (301) and the floating frame (303) are both rotatably connected to the telescopic rod (302).

6. A decanter for a wastewater treatment biological treatment tank according to claim 3, characterized in that: The upper side of the water inlet (309) is lower than the upper side of the floating frame (303).

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