Continuous flow biochemical system

Abstract

According to the continuous flow biochemical system provided by the utility model, the structure of the continuous flow biochemical system is improved, so that efficient solid-liquid separation in a continuous flow treatment process is realized, and the overall treatment efficiency and stability are improved. The continuous flow biochemical system comprises a biochemical pool, an overflow pipe provided with an overflow port and a filter bag with one end open, the biochemical pool is provided with a liquid cavity used for containing sewage, the overflow port and the filter bag are both located in the liquid cavity, and the opening of the filter bag is directly or indirectly connected with the overflow pipe in a sealed mode. A filter cavity is defined by a bag body of the filter bag, and the filter cavity extends in the vertical direction and is suspended on the lower portion of the overflow opening. The mode of arranging the filter bag at the overflow port replaces the original mode of automatically settling and separating granular sludge, so that efficient solid-liquid separation in the existing continuous flow treatment process is realized, and the overall treatment efficiency and stability are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a continuous flow biochemical system. Background Art

[0002] In the field of wastewater treatment, granular sludge, as a highly effective biological carrier, has become a key component in various biochemical treatment processes, including anaerobic, aerobic, and anaerobic ammonium oxidation, due to its unique structural characteristics and excellent treatment performance, such as high treatment efficiency, good settling properties, low sludge discharge, and strong impact resistance. Granular sludge generally has a particle size range of 0.3-5mm, and these characteristics enable it to significantly reduce operating costs and improve treatment efficiency in practical applications.

[0003] However, in existing water treatment technologies, both sequencing batch processes and continuous flow processes face certain challenges in the solid-liquid separation of granular sludge, especially the inability to achieve efficient separation of continuous flow, which has become one of the key factors limiting the improvement of the overall performance of the system.

[0004] In view of this, there is an urgent need for technical solutions for sludge interception to overcome the shortcomings of existing technologies, achieve efficient solid-liquid separation in continuous flow treatment processes, and improve overall treatment efficiency and stability. Utility Model Content

[0005] The purpose of the utility model is to provide a continuous flow biochemical system, which can realize efficient solid-liquid separation in the continuous flow treatment process by improving the structure of the continuous flow biochemical system, thereby improving the overall treatment efficiency and stability.

[0006] To achieve the above-mentioned objectives, the present invention provides a continuous flow biochemical system, comprising a biochemical pool, an overflow pipe provided with an overflow port, and a filter bag with an open end. The biochemical pool has a liquid cavity for accommodating sewage, the overflow port and the filter bag are both located in the liquid cavity, the opening of the filter bag is directly or indirectly sealedly connected to the overflow pipe, the bag body of the filter bag forms a filter cavity, and the filter cavity extends vertically and hangs over the lower part of the overflow port.

[0007] By setting filter bags at the overflow outlet, the original method of automatic sedimentation separation of granular sludge is replaced, and efficient solid-liquid separation is achieved in the current continuous flow treatment process, thereby improving the overall treatment efficiency and stability.

[0008] Optionally, the filter bag is further provided with a plurality of support rings, the bag body being connected to the inner or outer rings of the support rings, with the support rings being spaced apart vertically. By employing a plurality of support rings to support the bag body, the weight of the support rings can be utilized to prevent the filter bag from floating above the water surface, maintaining the filter bag suspended in the sewage. Furthermore, the support rings can be used to support the filter bag, thereby forming a stable filtrate cavity within the filter bag, providing sufficient filtration area and ensuring smooth water flow out of the biochemical pool.

[0009] Optionally, a connecting pipe is fixedly connected to the mouth of the filter bag, the connecting pipe is made of a rigid material, and the connecting pipe is sealed with the overflow port. The provision of the connecting pipe facilitates quick disassembly and assembly of the filter bag and the overflow port, ensuring a sealed connection between the filter bag and the overflow port.

[0010] Optionally, the inner diameter of the connecting pipe is smaller than the inner diameter of the support ring. In this way, the radial size of the support ring can be adjusted according to the water outlet requirements of the biochemical pool, and the radial sizes of the support rings can be the same or different.

[0011] Optionally, the filter bag is sealed and connected to the connecting pipe, thereby facilitating the installation of the filter bag and the connecting pipe.

[0012] Optionally, the filter bag is made of nylon or polytetrafluoroethylene. The filter screen made of such material can slightly swing under the action of water flow and aeration, thereby preventing the adhesion of granular sludge and achieving self-cleaning effects, which can delay the clogging of the filter screen and extend the service life.

[0013] Optionally, the overflow pipe includes a first pipe section and a second pipe section. The first pipe section extends horizontally, partially located within the liquid cavity and partially penetrating the wall of the biochemical tank to the exterior of the liquid cavity. One end of the second pipe section is sealed to the other end of the first pipe section via an autocoupler, and the overflow port of the overflow pipe is located at the other end of the second pipe section. This facilitates removal of the second pipe section from the first pipe section for inspection, cleaning, or replacement of the filter bag.

[0014] Optionally, the first pipe section is provided with a guide rail that extends vertically beyond the liquid chamber, and the second pipe section is provided with a slip ring that can be sleeved onto the outside of the guide rail. This facilitates external identification of the position of the first pipe section and facilitates installation and removal of the second pipe section from the first pipe section.

[0015] Optionally, the second pipe section includes a first sub-pipe section and a second sub-pipe section that are interconnected. The first sub-pipe section extends horizontally to connect to the first pipe section, and the second sub-pipe section is provided with the overflow port at one end. The second sub-pipe section extends vertically. This ensures that the second sub-pipe section is aligned with the extension direction of the filter bag, thereby preventing localized accumulation of granular sludge.

[0016] Optionally, the second sub-tube section further has an open end, which vertically extends beyond the liquid cavity. By providing the open end, a sample can be taken from the open end to test the sludge content of the filtered liquid or to observe the water quality.

[0017] Other features and advantages of the present specification will become apparent from the following detailed description of exemplary embodiments of the present specification with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the specification and, together with the description, serve to explain the principles of the specification.

[0019] Figure 1 It is a partial structural diagram of the continuous flow biochemical system in the embodiment of the present utility model.

[0020] Reference numerals:

[0021] 100-biochemical pool; 200-filter bag; 201-filter chamber; 202-support ring; 203-connecting pipe; 300-guide rail; 400-slip ring; 500-first pipe section; 600-second pipe section; 601-first sub-pipe section; 602-second sub-pipe section; 603-overflow outlet. DETAILED DESCRIPTION

[0022] The utility model provides a continuous flow biochemical system, which realizes efficient solid-liquid separation in the continuous flow treatment process by improving the structure of the continuous flow biochemical system, thereby improving the overall treatment efficiency and stability.

[0023] In order to enable those skilled in the art to better understand the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific implementation methods.

[0024] Relational terms such as “first” and “second” are used merely to distinguish one component from another having the same name, but do not necessarily require or imply any actual relationship or order between these components.

[0025] Among existing technical solutions, the core of the sequencing batch process lies in achieving solid-liquid separation through sludge settling. However, sludge settling requires a certain amount of time, which directly shortens the effective treatment time within a given tank capacity, thereby limiting the increase in treated water volume. Furthermore, to alleviate this problem, intermediate water tanks are often required as buffers, which not only increases system complexity and floor space, but also increases construction and operating costs.

[0026] On the other hand, while continuous flow processes theoretically enable continuous water inflow and outflow, they often rely on sedimentation tanks and other devices to separate granular sludge. These devices often have high investment costs, occupy large areas, and are difficult to maintain during actual operation. Separation efficiency is also easily affected by factors such as water flow conditions and sludge properties, making it difficult to achieve ideal results. More critically, when gases are generated in the system, such as methane produced during anaerobic treatment, granular sludge is easily carried by the gases and floats to the water surface, resulting in large amounts of sludge loss. This not only reduces treatment efficiency but also increases the difficulty and cost of subsequent treatment.

[0027] See Figure 1 , Figure 1 This is a partial structural diagram of a continuous flow biochemical system, where a continuous flow biochemical system refers to a system that performs biochemical reactions in a continuously flowing fluid environment.

[0028] As shown in the figure, the present invention provides a continuous flow biochemical system, including a biochemical tank 100 for accommodating sewage, an overflow pipe provided with an overflow port 603, and a filter bag 200 with an open end. The portion of the biochemical tank 100 used to accommodate sewage is defined as a liquid cavity, and the overflow port 603 and the filter bag 200 are both located within the liquid cavity. In other words, the overflow port 603 and the filter bag 200 are both immersed in the sewage. The biochemical tank 100 also has a water inlet. The sewage in the biochemical tank 100 enters through the water inlet and reacts in the biochemical tank 100 to form granular sludge. The sewage containing the granular sludge is filtered by the filter bag 200 to form a filtrate, which overflows to the outside of the biochemical tank 100 through the overflow port 603.

[0029] The opening of the filter bag 200 is directly or indirectly sealedly connected to the overflow pipe. The bag body of the filter bag 200 forms a filter cavity 201 . The filter cavity 201 extends vertically and hangs below the overflow port 603 .

[0030] By setting the filter bag 200 at the overflow port 603, the original automatic sedimentation separation method of the granular sludge is replaced, and efficient solid-liquid separation is achieved in the current continuous flow treatment process, thereby improving the overall treatment efficiency and stability.

[0031] In a specific implementation, the filter bag 200 is further provided with a plurality of support rings 202, which can be quadrilaterals, polygons, circles, or the like; the bag body is connected to the inner or outer side of the support ring 202; the bag body and the support ring 202 can be connected by a connecting rope, or be glued, or the bag body is provided with an overlapping area, which forms an insertion channel, and the unsealed support ring 202 is inserted into the insertion channel, and then the support ring 202 is sealed by welding or gluing, and the plurality of support rings 202 are arranged at intervals in the vertical direction. In this way, the filter bag 200 can also be stacked in sequence during non-use, facilitating storage and transportation of the filter bag 200.

[0032] By using a plurality of support rings 202 to support the bag body, on the one hand, the weight of the support ring 202 can be used to prevent the filter bag 200 from floating on the water surface, and keep the filter bag 200 hanging in the sewage; on the other hand, the support ring 202 can support the filter bag 200, form a stable filtrate cavity inside the filter bag 200, provide sufficient filtration area, and ensure smooth water outflow of the biochemical tank 100.

[0033] Of course, the support ring 202 can not be used, and a cylindrical support cylinder can be used, the cylinder wall of the support cylinder is provided with a plurality of large holes, and the bag body of the filter bag 200 covers the outer or inner cylinder wall of the support cylinder, which can be selected by those skilled in the art.

[0034] Optionally, the inner diameter of the connecting pipe 203 is smaller than the inner diameter of the support ring 202. In this way, the radial size of the support ring 202 can be adjusted according to the water outflow requirement of the biochemical tank 100, and the radial sizes of the support rings 202 can be the same or different. In this way, the size of the filter cavity 201 can be changed to adapt to the overflow requirement of the biochemical tank 100.

[0035] In an optional manner, the mouth of the filter bag 200 is fixedly connected with the connecting pipe 203, the connecting pipe 203 is made of rigid material, and the connecting pipe 203 is sealingly connected with the overflow port 603 through a connecting flange or a clamp. By providing the connecting pipe 203, the filter bag 200 and the overflow port 603 can be quickly disassembled and assembled, and the sealing connection between the filter bag 200 and the overflow port 603 is ensured.

[0036] Specifically, the filter bag 200 is sealingly connected with the connecting pipe 203. Thus, the installation of the filter bag 200 and the connecting pipe 203 is facilitated. The bag body and the connecting pipe 203 can be connected by riveting, and the inside to the outside are a fixed steel ring, a filter screen, and a filter screen connecting pipe 203, which are connected and fixed by a rivet, thereby facilitating subsequent replacement of the filter bag 200.

[0037] In the above embodiment, the filter bag 200 is made of nylon or polytetrafluoroethylene. The filter screen made of such material can slightly swing under the action of water flow and aeration, thereby preventing the adhesion of granular sludge and achieving self-cleaning effect, which can delay the clogging of the filter screen and extend the service life.

[0038] In other embodiments, the overflow pipe includes a first pipe section 500 and a second pipe section 600. The first pipe section 500 extends horizontally and is immersed in the sewage. One end of the first pipe section 500 is located outside the biochemical tank 100. The first pipe section 500 is also provided with a valve. By controlling the opening and closing states of the valve, the connection between the biochemical tank 100 and the outside can be controlled. The valve is normally open. When the filter bag 200 needs to be inspected and repaired, the valve is closed to prevent mud leakage.

[0039] One end of the second pipe section 600 is sealedly connected to the other end of the first pipe section 500 via a coupling. The overflow port 603 of the overflow pipe is located at the other end of the second pipe section 600. This facilitates removal of the second pipe section 600 from the first pipe section 500 for inspection, cleaning, or replacement of the filter bag 200. The coupling can be a self-coupling coupling, an elastic sleeve coupling, or a magnetic coupling.

[0040] As an optional feature, a guide rail 300 is provided at the end of the first pipe section 500 connected to the second pipe section 600. The guide rail 300 extends vertically to the upper portion of the liquid chamber, i.e., above the sewage level. A slip ring 400 is provided at the end of the second pipe section 600 connected to the first pipe section 500. The slip ring 400 can be sleeved onto the outer side of the guide rail 300. This facilitates external identification of the position of the first pipe section 500 and facilitates installation and removal of the second pipe section 600 from the first pipe section 500.

[0041] In actual operation, when the coupler adopts a magnetic coupler as an example, when it is necessary to form a sealed connection between the first pipe section 500 and the second pipe section 600, it is only necessary to put the slip ring 400 on the guide rail 300. Under the guidance of the guide rail 300, the ends of the first pipe section 500 and the second pipe section 600 connected can be gradually approached, and the two can be automatically coupled under the action of the magnetic coupler.

[0042] In addition, part of the guide rail 300 is located outside the sewage, which makes it easy for humans to identify the connection position of the first pipe section 500 and the second pipe section 600 in the water when installing, repairing, and replacing the filter bag 200, thereby facilitating positioning.

[0043] In one example, the second pipe section 600 includes a first sub-pipe section 601 and a second sub-pipe section 602 that are interconnected. The first sub-pipe section 601 extends horizontally to connect to the first pipe section 500. An overflow port 603 is provided at one end of the second sub-pipe section 602. The second sub-pipe section 602 extends vertically, thereby aligning with the extension direction of the filter bag 200 and preventing localized accumulation of granular sludge.

[0044] In another example, the other end of the second sub-tube segment 602 extends outside the liquid cavity, that is, vertically beyond the liquid cavity, and the other end is an open end. By providing the open end, samples can be taken from the open end to test the sludge content of the filtered liquid or to observe the water quality. That is to say, the second pipe section 600 is a T-shaped three-way pipe, in which one end of the second sub-pipe section 602 is connected to the connecting pipe 203, and the other end is provided with an open end. When installed, the open end is higher than the liquid surface and can be used to observe the water outlet to see whether it is clear. It can also be used as a sampling point. If necessary, a tube can be inserted through the open end to introduce compressed air or high-pressure water to play the role of online cleaning of the filter screen; the position where the first sub-pipe section 601 is connected to the first pipe section 500 is provided with a self-coupling connector, which is connected to the first pipe section 500 in an automatic coupling manner. In this way, the second pipe section 600 and the filter bag 200 connected to the second pipe section 600 can be removed from the sewage by grabbing the part of the second sub-pipe section 602 located above the liquid surface, thereby realizing the cleaning, maintenance, replacement, etc. of the filter screen without the need for underwater operation or drainage.

[0045] Compared with the existing technical solutions, the technical solution of this application has the following advantages:

[0046] First, the mesh size of the filter bag 200 is determined according to the particle size of the granular sludge. The filter bag 200 is set at the overflow port of the biochemical pool 100. When the filter bag 200 is thrown into the water, the granular sludge is intercepted outside the mesh by the filter bag 200, and a filter cavity 201 is formed in the filter bag 200 as the filtrate area, thereby realizing the separation of the granular sludge from the effluent and flocculent sludge.

[0047] Second, the support ring 202 creates a space within the filter bag 200, serving as the filter cavity 201. The weight of the support ring 202 ensures that the filter bag 200 remains suspended within the biochemical tank 100, creating an effective filtration area. Furthermore, the support ring 202 allows for slight swinging due to water flow and aeration, preventing clogging and extending the bag's useful life. Furthermore, because the bag is made of flexible material, the support ring 202 can be stacked for easy handling and transportation.

[0048] Third, the filter bag 200 has a sufficiently large filtering area, which also delays the occurrence of clogging. Even if clogging occurs, the valve and second pipe section 600 allow the filter bag 200 to be quickly lifted out of the water for cleaning. The filter bag 200 can be rinsed with a high-pressure water gun or soaked in a medicated solution. After cleaning, reinstallation simply requires returning the filter bag 200 to its original position using the guide rail 300 and slip ring 400. The entire cleaning process has little impact on the normal operation of the system. Due to the low cost of the filter bag 200, it is also possible to interchange two filter bags 200 (i.e., remove a filter bag 200 and replace it with a clean one, then clean the removed filter bag 200 and keep it for later use) to achieve uninterrupted operation, or simply replace it regularly to achieve maintenance-free operation.

[0049] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help you understand the core concept of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A continuous flow biochemical system, characterized in that: The invention comprises a biochemical pool (100), an overflow pipe provided with an overflow port (603), and a filter bag (200) with an opening at one end. The biochemical pool (100) has a liquid cavity for accommodating sewage. The overflow port (603) and the filter bag (200) are both located in the liquid cavity. The opening of the filter bag (200) is directly or indirectly sealedly connected to the overflow pipe. The bag body of the filter bag (200) forms a filter cavity (201). The filter cavity (201) extends vertically and hangs below the overflow port (603).

2. The continuous flow biochemical system according to claim 1, characterized in that The filter bag (200) is further provided with a plurality of support rings (202), and the bag body is connected to the inner ring side or the outer ring side of the support ring (202).

3. The continuous flow biochemical system according to claim 2, characterized in that: The mouth of the filter bag (200) is fixedly connected to a connecting pipe (203), and the connecting pipe (203) is sealedly connected to the overflow port (603).

4. The continuous flow biochemical system according to claim 3, characterized in that The inner diameter of the connecting pipe (203) is smaller than the inner diameter of the supporting ring (202).

5. The continuous flow biochemical system according to claim 3, characterized in that: The filter bag (200) is sealedly connected to the connecting pipe (203).

6. The continuous flow biochemical system according to claim 1, characterized in that: The filter bag (200) is made of flexible material.

7. The continuous flow biochemical system according to any one of claims 1 to 6, characterized in that: The overflow pipe includes a first pipe section (500) and a second pipe section (600), wherein the first pipe section (500) extends in a horizontal direction, with a portion thereof being located in the liquid cavity and a portion thereof penetrating the wall of the biochemical pool (100) to the outside of the liquid cavity, one end of the second pipe section (600) is sealedly connected to the first pipe section (500) via an autocoupler, and the overflow port (603) is located at the other end of the second pipe section (600).

8. The continuous flow biochemical system according to claim 7, characterized in that: A guide rail (300) is provided at one end where the first pipe section (500) is connected to the second pipe section (600), and the guide rail (300) extends vertically beyond the liquid cavity; a slip ring (400) is provided at one end where the second pipe section (600) is connected to the first pipe section (500), and the slip ring (400) can be sleeved on the outside of the guide rail (300).

9. The continuous flow biochemical system according to claim 8, characterized in that: The second pipe section (600) comprises a first sub-pipe section (601) and a second sub-pipe section (602) which are connected to each other. The first sub-pipe section (601) extends in a horizontal direction to be connected to the first pipe section (500). The second sub-pipe section (602) extends in a vertical direction. The overflow port (603) is located in the second sub-pipe section (602).

10. The continuous flow biochemical system according to claim 9, characterized in that: The second sub-tube section (602) also has an open end, and the open end extends vertically beyond the liquid chamber.

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