Horizontal circulation anaerobic treatment device

Abstract

The utility model relates to a horizontal circulation anaerobic treatment device which comprises an anaerobic tank, a flow guide wall, a water inlet assembly, a three-phase separator, an exhaust assembly and a water impeller, and the anaerobic tank is a closed tank body; the guide wall is arranged in the anaerobic tank, and the bottom of the guide wall is fixedly connected with the anaerobic tank; the water inlet assembly is connected with the anaerobic tank, and the water inlet end of the water inlet assembly extends into the annular runner; the three-phase separator is mounted in the anaerobic tank; the exhaust component is connected with the anaerobic tank, and the exhaust end of the exhaust component is communicated with the top of the anaerobic tank; the water impeller is mounted in the anaerobic tank; the huge circular flow can effectively dilute inlet water, anaerobic sludge in circulating sewage is contacted and collided in the process of flowing along with water, small particles are condensed into large particles, the impact load resistance is greatly improved, the settling performance is improved, small bubbles attached to the sludge are gradually enlarged until the small bubbles are broken, biogas separation is thorough, sludge loss is not prone to occurring, and the sewage treatment efficiency is improved. The sewage treatment capacity is high.

Description

Technical Field

[0001] This utility model relates to the field of water treatment technology, and in particular to a horizontal circulation anaerobic treatment device. Background Technology

[0002] Anaerobic reactors are classified into upflow anaerobic reactors and baffled anaerobic reactors (ABR) according to the flow pattern of wastewater in the reactor.

[0003] In an upflow anaerobic reactor, sludge, water, and gas rise simultaneously. After three-phase separation, the sludge falls back to the lower reaction zone, biogas is collected and drawn out, and water continues to rise and is discharged from the top. The rising biogas and water flow interfere with the descending sludge after separation, making it difficult for it to fall back down, resulting in uneven sludge concentration distribution in the reaction zone. At the same time, if the biogas attached to the sludge is not completely separated, the sludge density will decrease and it will float to the surface, easily being lost with the effluent.

[0004] The baffled anaerobic reactor separates sludge, water, and air by setting baffles, which allow the sludge to pass through multiple up and down flow paths. The organic load gradually decreases from the inlet to the outlet along the water flow direction, but the sludge concentration increases in a gradient. This results in an excessive sludge load at the inlet, poor system resistance to shock loads, and easy acidification, which damages the anaerobic system.

[0005] In summary, the existing anaerobic reactors have poor wastewater treatment capacity. Utility Model Content

[0006] In view of this, it is necessary to provide a horizontal circulation anaerobic treatment device to solve the problem of poor wastewater treatment capacity of existing anaerobic reactors.

[0007] This utility model provides a horizontal circulating anaerobic treatment device, including an anaerobic tank, a guide wall, an inlet assembly, a three-phase separator, an exhaust assembly, and a flow promoter. The anaerobic tank is a closed tank. The guide wall is disposed in the anaerobic tank, and its bottom is fixedly connected to the anaerobic tank to divide the interior of the anaerobic tank into an annular flow channel. The inlet assembly is connected to the anaerobic tank, and its inlet end extends into the annular flow channel. The three-phase separator is installed in the anaerobic tank. The exhaust assembly is connected to the anaerobic tank, and its exhaust end is connected to the top of the anaerobic tank. The flow promoter is installed in the anaerobic tank.

[0008] Furthermore, the guide wall is a vertically arranged wall structure, extending along the length of the anaerobic tank and positioned at the center of the anaerobic tank.

[0009] Furthermore, the water inlet assembly is arranged on one side of the guide wall, and the three-phase separator and the exhaust assembly are arranged on the other side of the anaerobic tank.

[0010] Furthermore, the water inlet assembly includes an inlet pipe and a distribution pipe. One end of the inlet pipe is used to connect to sewage, and the other end of the inlet pipe extends into the anaerobic tank and is connected to the distribution pipe. The distribution pipe is arranged perpendicular to the water flow direction in the annular channel. Multiple distribution holes are opened on the side of the distribution pipe near the water flow direction in the annular channel, and the multiple distribution holes are arranged sequentially along the length of the distribution pipe.

[0011] Furthermore, the three-phase separator includes an outer cylinder, an inner cylinder, and an effluent weir fixedly installed in the anaerobic tank. The outer cylinder is fitted over the lower half of the inner cylinder, and a reflux port is provided at the bottom tip of the outer cylinder. The effluent weir is built into the upper half of the inner cylinder.

[0012] Furthermore, the water inlet assembly, the exhaust assembly, and the three-phase separator are arranged sequentially along the water flow direction within the annular flow channel.

[0013] Furthermore, the top of the flow guide wall is spaced apart from the inner top wall of the anaerobic tank.

[0014] Furthermore, the exhaust assembly also includes an exhaust pipe that is connected to the top of the anaerobic tank.

[0015] Furthermore, the exhaust assembly also includes a water seal tank, and the exhaust pipe extends from the end away from the anaerobic tank into the liquid contained in the water seal tank.

[0016] Furthermore, there are multiple propellers, which are installed on the inner bottom wall of the anaerobic tank and arranged sequentially along the water flow direction in the annular channel.

[0017] Compared with existing technologies, the wastewater introduced by the inlet component can circulate along the annular flow channel through the set guide wall. The wastewater comes into full contact with the anaerobic sludge in the anaerobic tank. The treated wastewater is separated from the three-phase separator. At the same time, the exhaust component discharges biogas. In the above treatment process, the huge circulation flow can effectively dilute the inlet water. The anaerobic sludge in the circulating wastewater comes into contact and collides with the water flow, and the small particles are aggregated into large particles. The shock load resistance is greatly improved, the settling performance is improved, and the small bubbles attached to the sludge gradually grow larger until they burst. The biogas separation is thorough, and sludge loss is not easy. The wastewater treatment capacity is strong. Attached Figure Description

[0018] Figure 1 A top view of the overall horizontal circulation anaerobic treatment device provided in this embodiment of the utility model;

[0019] Figure 2 for Figure 1 A cross-sectional view of the whole;

[0020] Figure 3 for Figure 1 A schematic diagram of the structure of a three-phase separator. Detailed Implementation

[0021] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0022] like Figure 1-2 As shown, the present invention provides a horizontal circulating anaerobic treatment device, comprising an anaerobic tank 100, a guide wall 200, an inlet assembly 300, a three-phase separator 400, an exhaust assembly 500, and a flow promoter 600. The anaerobic tank 100 is a closed tank. The guide wall 200 is disposed in the anaerobic tank 100, and its bottom is fixedly connected to the anaerobic tank 100, for dividing the interior of the anaerobic tank 100 into an annular flow channel. The inlet assembly 300 is connected to the anaerobic tank 100, and its inlet end extends into the annular flow channel. The three-phase separator 400 is installed inside the anaerobic tank 100. The exhaust assembly 500 is connected to the anaerobic tank 100, and its exhaust end is connected to the top of the anaerobic tank 100. The flow promoter is installed in the anaerobic tank.

[0023] During implementation, the wastewater introduced by the inlet component 300 can circulate along the annular flow channel through the set guide wall 200. The wastewater fully contacts the anaerobic sludge in the anaerobic tank 100. The treated wastewater is separated from the three-phase separator 400. At the same time, the exhaust component 500 discharges biogas. In the above treatment process, the huge circulation flow can effectively dilute the inlet water. The anaerobic sludge in the circulating wastewater comes into contact and collides with the water flow, and the small particles are aggregated into large particles. The shock load resistance is greatly improved, the settling performance is improved, and the small bubbles attached to the sludge gradually grow larger until they burst. The biogas separation is thorough, and it is not easy to cause sludge loss. The wastewater treatment capacity is strong.

[0024] In this implementation plan, the anaerobic tank 100 is a closed tank.

[0025] In this embodiment, the flow guide wall 200 is disposed in the anaerobic tank 100, and the bottom of the flow guide wall 200 is fixedly connected to the anaerobic tank 100 to divide the interior of the anaerobic tank 100 into annular flow channels.

[0026] In this embodiment, the guide wall 200 is a vertically arranged wall structure that extends along the length of the anaerobic tank 100 and is located at the center of the anaerobic tank 100. The length of the guide cavity is less than the length of the anaerobic tank 100.

[0027] To prevent wastewater entering the annular flow channel from immediately being discharged from the three-phase separator 400, in one embodiment, the inlet assembly 300 is arranged on one side of the guide wall 200, and the three-phase separator 400 and the exhaust assembly 500 are arranged on the other side of the anaerobic tank 100. This ensures the time and distance required for wastewater to flow from the inlet assembly 300 to the three-phase separator 400.

[0028] The water inlet assembly 300 in this embodiment includes an inlet pipe 310 and a distribution pipe 320. One end of the inlet pipe 310 is used to connect to sewage, and the other end of the inlet pipe 310 extends into the anaerobic tank 100 and is connected to the distribution pipe 320. The distribution pipe 320 is set perpendicular to the water flow direction in the annular channel. Multiple distribution holes are opened on the side of the distribution pipe 320 near the water flow direction in the annular channel. The multiple distribution holes are arranged sequentially along the length of the distribution pipe 320.

[0029] In one embodiment, the water distribution pipe 320 is a U-PVC pipe or a steel pipe, located at the bottom of the anaerobic tank 100. To ensure uniform water distribution, a row of water distribution holes with a diameter of 20-25mm is opened on one side of the water distribution pipe 320 at a 45-degree downward angle. Of course, in other embodiments, the design angle of the water distribution holes can be 30 degrees downward, etc., and there is no limitation on this.

[0030] like Figure 3 As shown, the three-phase separator 400 in this embodiment includes an outer cylinder 410, an inner cylinder 420 and an outlet weir 430, which are fixedly installed in the anaerobic tank 100. The outer cylinder 410 is sleeved on the lower half of the inner cylinder 420. A reflux port 411 is opened at the bottom tip of the outer cylinder 410. The outlet weir 430 is built into the upper half of the inner cylinder 420.

[0031] The three-phase separator 400 is a device for separating three media: sewage, sludge, and biogas. It is installed at the top of the anaerobic tank 100. During the ascent of the sludge-water-gas mixture, it collides with the wall of the three-phase separator 400 and changes its flow direction multiple times. Separation occurs by utilizing the density difference among the three media. The biogas rises to the top of the anaerobic tank 100, the sludge sinks back into the anaerobic tank 100, and the clean water is discharged through the effluent weir 430 and effluent pipe 431 at the top of the three-phase separator 400.

[0032] In one embodiment, the water inlet assembly 300, the exhaust assembly 500, and the three-phase separator 400 are arranged sequentially along the water flow direction within the annular channel.

[0033] In one embodiment, the top of the flow guide wall 200 is spaced apart from the inner top wall of the anaerobic tank 100.

[0034] like Figure 2 As shown, the exhaust assembly 500 in this embodiment also includes an exhaust pipe 510, which is connected to the top of the anaerobic tank 100.

[0035] In one embodiment, the exhaust assembly 500 further includes a water seal tank 520, with the exhaust pipe 510 extending away from the anaerobic tank 100 into the liquid contained within the water seal tank 520. The water seal tank 520, located outside the anaerobic tank 100, is a cylindrical, sealed tank containing a certain depth of clean water. This water seal tank serves to separate the front biogas collection pipe from the rear biogas delivery pipe. The front biogas collection pipe (i.e., the exhaust pipe 510) is inserted into the water to a certain depth, while the rear biogas delivery pipe is above the water surface. This is a safety measure to prevent external factors from causing biogas combustion or explosion within the anaerobic tank 100.

[0036] In this embodiment, there are multiple propellers 600, which are installed on the inner bottom wall of the anaerobic tank 100 and arranged sequentially along the water flow direction in the annular channel. The propellers 600 play a mixing and propulsion role, ensuring that the horizontal flow velocity in the anaerobic tank 100 is not less than 0.3 m / s.

[0037] Compared with existing technologies:

[0038] 1) Compared with ordinary anaerobic reactors, the horizontal circulation anaerobic tank 100 has a larger circulation flow rate, which effectively dilutes the influent and distributes the organic load effectively. The operating conditions at different points in the anaerobic tank 100 are basically the same, thus greatly improving the ability to withstand shock loads.

[0039] 2) Because a low-speed submersible propulsion device (i.e. propulsion device 600) is installed, the biogas attached to the sludge begins to separate as it flows with the water. The biogas rises directly to the top of the pool and is discharged in time, avoiding a large amount of biogas from entering the three-phase separator 400 at the back end, which would affect the sludge settling and separation and cause sludge loss.

[0040] 3) At the same time, since alkalinity is generated during the anaerobic methanogenesis stage, the organic acids produced during the anaerobic acidification process can be neutralized in time, preventing them from accumulating and causing rancidity. This reduces the amount of additional alkali needed and saves operating costs.

[0041] 4) The fully enclosed pool structure can make full use of the unused space above the water surface as a biogas storage area, resulting in high pool capacity utilization.

[0042] 5) It can be buried underground and covered with soil and greenery on the top of the pool, saving land area; for cold winter areas, burying can reduce the cost of pool insulation and improve the efficiency of anaerobic treatment.

[0043] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. A horizontal circulation anaerobic treatment device, characterized in that, include: Anaerobic tank, which is a closed tank; A flow guide wall is installed in the anaerobic tank, and the bottom of the flow guide wall is fixedly connected to the anaerobic tank to divide the interior of the anaerobic tank into annular flow channels. An inlet assembly, which is connected to the anaerobic tank and whose inlet end extends into the annular flow channel; A three-phase separator is installed inside the anaerobic tank; An exhaust assembly, which is connected to the anaerobic tank and whose exhaust end is connected to the top of the anaerobic tank; A flow promoter is installed in the anaerobic tank.

2. The horizontal circulation anaerobic treatment device according to claim 1, characterized in that, The guide wall is a vertically arranged wall structure that extends along the length of the anaerobic tank and is located at the center of the anaerobic tank.

3. The horizontal circulation anaerobic treatment device according to claim 1, characterized in that, The water inlet assembly is arranged on one side of the guide wall, and the three-phase separator and the exhaust assembly are arranged on the other side of the anaerobic tank.

4. The horizontal circulation anaerobic treatment device according to claim 1, characterized in that, The water inlet assembly includes an inlet pipe and a distribution pipe. One end of the inlet pipe is used to connect to sewage, and the other end of the inlet pipe extends into the anaerobic tank and is connected to the distribution pipe. The distribution pipe is set perpendicular to the water flow direction in the annular channel. Multiple distribution holes are opened on the side of the distribution pipe near the water flow direction in the annular channel. The multiple distribution holes are arranged sequentially along the length of the distribution pipe.

5. The horizontal circulation anaerobic treatment device according to claim 1, characterized in that, The three-phase separator includes an outer cylinder, an inner cylinder, and an effluent weir fixedly installed in the anaerobic tank. The outer cylinder is fitted over the lower half of the inner cylinder, and a reflux port is provided at the bottom tip of the outer cylinder. The effluent weir is built into the upper half of the inner cylinder.

6. The horizontal circulation anaerobic treatment device according to claim 1, characterized in that, The water inlet assembly, the exhaust assembly, and the three-phase separator are arranged sequentially along the water flow direction within the annular flow channel.

7. The horizontal circulation anaerobic treatment device according to claim 1, characterized in that, The top of the flow guide wall is spaced apart from the inner top wall of the anaerobic tank.

8. The horizontal circulation anaerobic treatment device according to claim 1, characterized in that, The exhaust assembly also includes an exhaust pipe that is connected to the top of the anaerobic tank.

9. The horizontal circulation anaerobic treatment device according to claim 8, characterized in that, The exhaust assembly also includes a water seal tank, and the exhaust pipe extends from the end away from the anaerobic tank into the liquid contained in the water seal tank.

10. The horizontal circulation anaerobic treatment device according to claim 1, characterized in that, The number of propellers is multiple, and the multiple propellers are installed on the inner bottom wall of the anaerobic tank and arranged sequentially along the water flow direction in the annular flow channel.

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