A floating vertical flow reaction device and sewage treatment system

Abstract

The application relates to a floating vertical flow reaction device and a sewage treatment system, and the key point is that a floating outer cylinder is adopted, which comprises a cylinder body, a floating support and a first flexible connecting piece; the cylinder body is sleeved outside an inner cylinder and a flow guide piece and is flexibly connected with the inner cylinder or / and the flow guide piece; the floating support is arranged around the outer periphery of the cylinder body; the first flexible connecting piece is connected with the bottom end of the cylinder body at one end and is fixed with the bottom of a sewage pool at the other end; the device has the advantages of automatically adjusting the height according to the water level change of the sewage pool, absorbing the vibration generated by liquid flow or aeration, coupling the mature granular sludge in the device to form a composite flow state of 'plug flow + multi-point vertical flow', and diffusing the functional bacteria groups attached to the granular sludge into the sewage pool and the like.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of sewage treatment, and particularly relates to a floating vertical flow reaction device and a sewage treatment system. BACKGROUND

[0002] In the field of sewage treatment, traditional biological treatment units (such as plug flow aeration tanks and anaerobic baffled reactors) often adopt a “plug flow” flow pattern and a “fixed water level” design. In a plug flow system, sewage flows unidirectionally along the tank length, and the substrate concentration and dissolved oxygen (DO) are distributed in a gradient: in the aerobic section (such as the aeration zone), the dissolved oxygen concentration is maintained by aeration along the way, and the sludge concentration remains relatively stable along the way, which meets the low-concentration requirement of fast metabolism of aerobic microorganisms; in the anaerobic section (such as the pre-anaerobic zone), there is no aeration, and the contact between the substrate and the sludge is achieved by plug flow. Since there is no backflow to strengthen mixing, a fixed high water level is needed to increase the hydraulic retention time, and a high-concentration sludge is maintained to make up for the low mass transfer efficiency of plug flow and to avoid the reaction lag caused by insufficient biomass of anaerobic microorganisms. However, the plug flow and fixed water level design limits the dynamic adjustment of sludge concentration: on the one hand, it leads to stable hydraulic load, and precise control of the inflow rate is needed to avoid sludge loss by flushing (especially in the aerobic section); on the other hand, the anaerobic section needs to optimize the water distribution mode (such as multi-point water distribution) under a fixed water level to ensure uniform distribution of high-concentration sludge and prevent local accumulation of substrates from causing organic acid inhibition.

[0003] In addition, improving the degradation efficiency of pollutants in sewage by circulating flow is a common treatment method. New reactor configurations often adjust and optimize the circulation path of the mixed liquor in the sewage treatment system. For example, the Chinese patent application with the publication number CN117069266A discloses a sewage treatment device, which specifically discloses that the device comprises: a device body, the device body has a reaction cavity inside; an inner cylinder, the inner cylinder is contained in the reaction cavity, and the reaction cavity is divided into a first chamber inside the inner cylinder and a second chamber between the inner cylinder and the device body; an aeration device, the aeration device is arranged at the bottom of the reaction cavity and has an aeration port, the aeration port is configured to aerate upward along the axial direction of the inner cylinder to form an upward flow in the first chamber and a downward flow in the second chamber; and a flow guide device, the flow guide device is connected to the axial bottom end of the inner cylinder, and the flow guide device comprises a first flow guide part and a second flow guide part connected in sequence from top to bottom along the axial direction of the inner cylinder, wherein the circumferential side wall of the first flow guide part is provided with through holes, so that the downward flow at least partially enters the first chamber through the through holes and at least partially enters the first chamber through the bottom end of the second flow guide part.

[0004] Due to the fixed outer cylinder, on the one hand, it is difficult to automatically adjust the height according to the water level change of the sewage tank when the water level fluctuates or the water inflow changes; on the other hand, due to the fixed internal flow field of the sewage treatment device, it is difficult to mix with the sewage in the sewage tank, so that the mature granular sludge and the functional bacteria attached to the granular sludge are diffused into the sewage tank. In addition, the rigid connection mode is usually adopted between the inner cylinder and the outer cylinder or the flow guide, which cannot absorb the vibration caused by the flow impact or aeration disturbance, and is easy to cause damage at the connection, affecting the stability and service life of the equipment.

[0005] Therefore, how to provide a device that can automatically adjust the height according to the water level change of the sewage tank, couple to form a composite flow state of "along-the-way push flow + multi-point vertical flow", absorb the vibration caused by the liquid flow or aeration, and diffuse the mature granular sludge in the device and the functional bacteria attached to the granular sludge into the sewage tank is a technical problem to be solved in the field. SUMMARY

[0006] To solve at least one of the above technical problems, the present application provides a floating vertical flow reaction device, an inner cylinder, a floating outer cylinder and a flow guide.

[0007] The inner cylinder and the floating outer cylinder are nested and separated to form an inner reaction chamber inside the inner cylinder and an outer reaction chamber between the inner cylinder and the floating outer cylinder.

[0008] The flow guide is connected to the axial bottom end of the inner cylinder and includes sieve holes provided on the sidewall of the upper end of the flow guide and through holes provided in the flow guide, wherein the size of the sieve holes is smaller than the size of the through holes.

[0009] The floating outer cylinder includes:

[0010] The cylinder body, the floating support and the first flexible connecting piece;

[0011] The cylinder body is sleeved on the periphery of the inner cylinder and the flow guide;

[0012] The floating support is arranged around the periphery of the cylinder body;

[0013] The first flexible connecting piece is connected to the bottom end of the cylinder body at one end and fixed to the bottom of the sewage tank at the other end.

[0014] Further, the cylinder body includes a water-permeable film and a connecting framework;

[0015] The water-permeable film has a smooth surface and is provided with micropores;

[0016] The connecting framework is arranged in the water-permeable film to support the water-permeable film and form a hollow fence structure.

[0017] Further, the floating support includes a plurality of floating pieces arranged on the outside of the cylinder body in an upward-downward interval.

[0018] Further, the floating support further comprises: a mounting bracket; the mounting bracket comprises a crossbeam and a longitudinal beam;

[0019] The longitudinal beam is vertically arranged outside the barrel body;

[0020] The crossbeam is a plurality of outer rings adapted to the shape of the barrel body, which are arranged on the longitudinal beam in a top-to-bottom manner;

[0021] A plurality of floating members are arranged on the corresponding outer rings respectively.

[0022] Further, the floating outer barrel further comprises: a second flexible connecting member;

[0023] The outer wall of the inner barrel or / and the flow guide member is arranged with a first flexible connecting point;

[0024] The inner wall of the barrel body is arranged with a second flexible connecting point corresponding to the first flexible connecting point;

[0025] The first end of the second flexible connecting member is detachably connected to the first flexible connecting point, and the second end is detachably connected to the second flexible connecting point.

[0026] Further, the top of the floating support is higher than the liquid level;

[0027] The uppermost edge of the inner barrel is lower than the liquid level;

[0028] The uppermost edge of the barrel body is higher than the uppermost edge of the inner barrel.

[0029] Further, the barrel body comprises: four layers arranged in a top-to-bottom manner; the layered structures are detachably connected;

[0030] The first layer barrel body is connected to the upper edge of the inner barrel;

[0031] The second layer barrel body is connected to the lower edge of the inner barrel;

[0032] The third layer barrel body is connected to the flow guide member;

[0033] The fourth layer barrel body is located below the flow guide member.

[0034] Further, the first layer barrel body, the second layer barrel body and the third layer barrel body are hollow cylindrical structures;

[0035] The bottom of the fourth layer barrel body is tapered to form a bottom small hole, the edge of the bottom small hole is arranged with a first flexible connecting member in a spaced manner, and the bottom small hole is fixed to the bottom of the sewage pool through the first flexible connecting member.

[0036] A sewage treatment system, comprising: a sewage pool, a floating vertical flow reaction device and an aeration member;

[0037] The floating vertical flow reaction device is arranged in the sewage tank, and is any floating vertical flow reaction device described above.

[0038] The aeration member is arranged at the bottom of the sewage tank and at the lower central position of the floating vertical flow reaction device, and is used for upward aeration.

[0039] Further, the floating vertical flow reaction device is one or more; and the third flexible connecting member is further included.

[0040] The plurality of floating vertical flow reaction devices are flexibly connected and positionally fixed to the sewage tank through the third flexible connecting member.

[0041] Each floating vertical flow reaction device has a relatively independent internal circulation flow state and biochemical reaction environment in the sewage treatment system, and continuously exchanges with the mixed liquid outside through the upper opening and the bottom opening of the floating outer cylinder; during operation, the fluid continuously circulates by ascending in the inner reaction cavity, bypassing the top end of the inner cylinder, descending in the outer reaction cavity, bypassing the lower end of the flow guide member, or passing through the sieve holes on the side wall.

[0042] In this embodiment, a floating vertical flow reaction device is given. First, the floating outer cylinder is formed by the cylinder body, the floating support member and the first flexible connecting member. The reaction device can automatically float up and down with the liquid level of the sewage tank, so that the device can maintain stable operation at different water levels without the need for additional complex water level adjustment system or floating control system, reducing the operating energy consumption and the frequency of manual maintenance. Second, under the disturbance of the aeration member and the liquid flow disturbance of the sewage tank, the floating outer cylinder can produce moderate shaking, so that the mature granular sludge, part of the flocculent sludge and small particle size granular sludge in the inner reaction cavity and the outer reaction cavity can be accelerated to diffuse into the sewage tank, realizing the rapid migration and uniform diffusion of functional granular sludge and attached bacteria, and accelerating the granulation process of the overall sludge in the sewage tank. At the same time, under the action of the floating outer cylinder shaking and the liquid flow disturbance, part of the sewage in the sewage tank can enter the inside of the reaction device and mix with the internal circulation liquid flow, so that the organic pollutants and nitrogen, phosphorus and other pollutants in the external sewage can be introduced into the reaction device in time to participate in biochemical reaction, improving the treatment efficiency of the sewage and the cultivation efficiency of the granular sludge, and further realizing the rapid domestication of the granular sludge and the efficient enrichment of the functional bacteria. Third, the cylinder body, the floating support member, the first flexible connecting member and the subsequent second flexible connecting member can form a flexible buffer area in structure, so that the vibration caused by the liquid flow impact and the aeration disturbance can be absorbed and buffered, reducing the damage of the severe disturbance to the structure of the granular sludge, ensuring that the granular sludge can stably grow and maintain integrity in the circulation path, and further improving the sewage treatment effect. For example, the first flexible connecting member, the second flexible connecting member and the third flexible connecting member can be selected from flexible ropes, rubber hoses, rubber ropes, nylon woven ropes, polyester woven ropes or stainless steel spring members, etc.

[0043] In summary, the application provides a floating vertical flow reaction device, including a floating outer cylinder, which has the advantages of automatically adjusting the height according to the water level of the sewage pool, absorbing the vibration generated by the liquid flow or aeration, diffusing the mature granular sludge in the device and the functional bacteria groups attached to the granular sludge into the sewage pool, and the like. BRIEF DESCRIPTION OF DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following briefly introduces the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from the drawings shown in the following description without creative labor. In the drawings, the same components are denoted by the same reference numerals. The drawings are not drawn according to the actual proportion.

[0045] Figure 1 Structure diagram of an embodiment of a floating vertical flow reaction device of the present application;

[0046] Figure 2 Structure diagram of an embodiment of a floating vertical flow reaction device of the present application;

[0047] Figure 3 Structure diagram of an embodiment of a floating vertical flow reaction device of the present application;

[0048] Figure 4 Structure diagram of an embodiment of a sewage treatment system of the present application. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments only constitute some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0050] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or can have a middle element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or can have a middle element.

[0051] It should be further noted that if the present application embodiments involve directionality indications, such as up, down, left, right, front, back, etc., the directionality indications are only used to explain the relative position relationship between the components, the movement, etc. in a certain posture, and if the posture changes, the directionality indications will also change accordingly. In addition, if the present application embodiments involve descriptions such as "first, second", "S1, S2", "step one, step two" and the like, such descriptions are only for description purposes, and cannot be understood as indicating or implying the relative importance of the technical features indicated or the number of technical features indicated, or indicating the execution order of the method, etc. Those skilled in the art can understand that any change within the technical concept of the application without deviating from the technical concept of the application should be included in the protection scope of the application.

[0052] The present application provides a floating vertical flow reaction device, as shown in the drawings, comprising: an inner cylinder 1, a floating outer cylinder 2, and a flow guide 3. Figure 1 The inner cylinder and the floating outer cylinder are nested and arranged to form an inner reaction chamber 11 inside the inner cylinder and an outer reaction chamber 12 between the inner cylinder and the floating outer cylinder.

[0053] The inner cylinder and the floating outer cylinder are nested and arranged to form an inner reaction chamber 11 inside the inner cylinder and an outer reaction chamber 12 between the inner cylinder and the floating outer cylinder.

[0054] The flow guide is connected to the axial bottom end of the inner cylinder and comprises: a sieve hole provided on the sidewall of the upper end of the flow guide; and a through hole provided in the flow guide; the size of the sieve hole is smaller than the size of the through hole; preferably, as shown in the drawings, the flow guide comprises a first flow guide part 31 at the upper end and a second flow guide part 32 at the lower end; the first flow guide part 31 is an inner inclined flow guide part, and the second flow guide part 32 is an outer inclined flow guide part; the sieve hole 33 is provided on the sidewall of the first flow guide part 31; preferably, it can also include a vertical flow guide part 34. Figure 1

[0055] The present application is characterized in that the outer cylinder is a floating outer cylinder, comprising:

[0056] The cylinder body 21, the floating support 22, and the first flexible connecting part 23;

[0057] The cylinder body is sleeved around the periphery of the inner cylinder and the flow guide;

[0058] The floating support is arranged around the periphery of the cylinder body;

[0059] The first flexible connecting part is connected to the bottom end of the cylinder body at one end and fixed to the bottom of the sewage pool at the other end.

[0060] ​In this embodiment, a floating vertical flow reaction device is given, which can be optionally applied in a sewage tank, and an aeration member is arranged in the sewage tank, which is used to aerate upward, the inner reaction chamber forms an oxygen-rich zone, and an upward liquid flow is formed, which simultaneously disturbs the sewage in the sewage tank; the clear liquid, flocculent sludge, and small-particle-size granular sludge in the sewage are circulated, collided, and aggregated along the screen holes on the side wall of the flow guide member, the inner reaction chamber, and the outer reaction chamber between the inner cylinder and the floating outer cylinder, to complete a first circulation path, gradually grow into large-particle-size granular sludge, and attach various functional bacterial groups, while consuming oxygen in the inner reaction chamber, and form an anoxic zone between the floating outer cylinder and the flow guide member; and the large-particle-size granular sludge grows into mature sludge rich in functional microorganisms along the through holes, the inner reaction chamber, and the outer reaction chamber, and undergoes anammox reaction in the anoxic zone to remove nitrogen, phosphorus, and other pollutants in the sewage, and grows into mature sludge rich in functional microorganisms.

[0061] More importantly, first, the floating outer cylinder is formed by the cylinder body, the floating support, and the first flexible connecting member, the reaction device can automatically float up and down as the liquid level of the sewage tank rises and falls, so that the device can maintain stable operation at different water levels without the need for additional complex water level adjustment systems or floating control systems, reducing energy consumption and the frequency of manual maintenance; second, under the disturbance of the aeration member and the liquid flow disturbance of the sewage tank itself, the floating outer cylinder can produce moderate shaking, so that the mature granular sludge, part of the flocculent sludge, and small-particle-size granular sludge in the inner reaction chamber and the outer reaction chamber are accelerated to diffuse into the sewage tank, realizing the rapid migration and uniform diffusion of functional granular sludge and attached bacterial groups, and accelerating the granulation process of the overall sludge in the sewage tank. At the same time, under the action of the floating outer cylinder shaking and liquid flow disturbance, part of the sewage in the sewage tank can enter the inside of the reaction device and mix with the circulating liquid flow in the device, so that the organic pollutants and nitrogen, phosphorus, and other pollutants in the external sewage are introduced into the reaction device in time to participate in biochemical reactions, improving the treatment efficiency of the sewage and the cultivation efficiency of the granular sludge, and further realizing the rapid domestication of the granular sludge and the efficient enrichment of the functional bacterial groups; third, due to the cylinder body, the floating support, the first flexible connecting member, and the subsequent second flexible connecting member, a flexible buffer area can be formed in structure, so that the vibration caused by liquid flow impact and aeration disturbance is absorbed and buffered, reducing the damage of severe disturbance to the structure of the granular sludge, ensuring that the granular sludge can stably grow and maintain integrity in the circulation path, and further improving the sewage treatment effect. For example, the first flexible connecting member, the second flexible connecting member, and the third flexible connecting member can be selected from flexible ropes, rubber hoses, rubber ropes, nylon braided ropes, or polyester braided ropes, or stainless steel spring members, etc.

[0062] In summary, the application provides a floating vertical flow reaction device, which comprises a floating outer cylinder, has the advantages of automatically adjusting the height according to the water level of the sewage pool, absorbing the vibration caused by liquid flow or aeration, diffusing the mature granular sludge in the device and the functional bacteria attached to the granular sludge into the sewage pool, and the like; and changes the traditional "plug flow" flow pattern into a composite form of "plug flow along the path + multiple vertical flow", thereby further improving the internal reaction flexibility.

[0063] Preferably, as shown in the drawings, the cylinder body comprises a water-permeable film 211 and a connecting framework 212. Figure 2

[0064] The water-permeable film has a smooth surface and is provided with micropores.

[0065] The connecting framework is arranged in the water-permeable film to support the water-permeable film and form a hollow enclosing structure.

[0066] In this embodiment, the cylinder body adopts a water-permeable film structure, and micropores are arranged on the surface, so that the sewage can freely pass through the water-permeable film to enter or flow out of the cylinder body, realizing the free exchange of liquid flow between the inner reaction cavity, the outer reaction cavity and the sewage pool, which is beneficial to the rapid entry of floc sludge and small-particle-size granular sludge into the reaction area. The water-permeable film has a smooth surface, and the micropore diameter can be freely set by the person skilled in the art according to the requirements, so that the floc sludge and the small-particle-size granular sludge can smoothly pass through, while the large-particle-size granular sludge is difficult to penetrate the micropores and is directly lost, thereby ensuring the enrichment and stable growth of the granular sludge in the system. At the same time, the smooth surface reduces the attachment of sludge and impurities and reduces the risk of membrane surface blockage, thereby facilitating long-term stable operation. The connecting framework arranged in the water-permeable film provides support for the water-permeable film, which is similar to the structure of a Kongming lantern, and ensures that the hollow enclosing structure is not easily deformed, collapsed or broken during liquid flow disturbance, aeration disturbance and water level change, thereby maintaining the stability of the hollow enclosing structure.

[0067] More preferably, the water-permeable film can be made of polyester geotextile, microporous high-density polyethylene or polytetrafluoroethylene, has excellent chemical corrosion resistance, can resist the erosion of acids, alkalis, salts and various organic matters in the sewage, and is suitable for different types of sewage treatment environments. More preferably, the water-permeable film has a tensile strength of >10 kN / m, a tear strength of >20 kN / m, a smooth surface and micropore sizes of <0.1 mm.

[0068] Preferably, as shown in the drawings, the cylinder body comprises a water-permeable film 211 and a connecting framework 212. Figure 1 and Figure 3 ​The floating support member includes a plurality of floating members 221 which are arranged in intervals from top to bottom on the outer side of the barrel body. The plurality of floating members are arranged in intervals from top to bottom on the outer side of the barrel body, and can provide distributed floating support according to the rising and falling of the sewage pool liquid level, so that the barrel body can automatically float up and down with the water level, and ensure that the device can stably operate at different water levels. Optionally, the floating member is a foamed plastic block, a closed-cell foam material, an inflatable buoy, or a light-weight floating body with corrosion resistance. By selecting the above-mentioned materials, the floating member not only has good floating support capability, but also can effectively adapt to the complex chemical and physical environment in the sewage pool.

[0069] Preferably, as Figure 3 The floating support member further includes: a mounting bracket 222; the mounting bracket includes a cross beam 222a and a longitudinal beam 222b;

[0070] The longitudinal beam is vertically arranged on the outer side of the barrel body.

[0071] The cross beam is a plurality of outer rings which are arranged in intervals from top to bottom on the longitudinal beam and are adapted to the shape of the outer side of the barrel body.

[0072] The plurality of floating members are respectively arranged on the corresponding outer rings.

[0073] In this embodiment, by vertically arranging the longitudinal beam on the outer side of the barrel body and arranging the cross beam in the form of a plurality of outer rings in intervals from top to bottom on the longitudinal beam, the floating members can be stably and uniformly distributed around the barrel body, forming balanced distributed floating support, so that the barrel body can maintain a vertically stable state in water, and tilting or rotation caused by uneven floating force can be avoided. The floating members are arranged in intervals from top to bottom on the outer ring cross beam, so that the floating force forms layered floating support, and cooperates with the flexible connecting member to realize automatic and smooth lifting of the barrel body with the water level, and ensures stable operation of the device.

[0074] Preferably, as Figure 1 and Figure 2 The floating outer barrel further includes: a second flexible connecting member 24.

[0075] The outer wall of the inner barrel or / and the flow guide member is provided with a first flexible connecting point 25.

[0076] The inner wall of the barrel body is provided with a second flexible connecting point 26 corresponding to the first flexible connecting point.

[0077] The first end of the second flexible connecting member is detachably connected to the first flexible connecting point, and the second end is detachably connected to the second flexible connecting point.

[0078] In this embodiment, the second flexible connecting member is additionally arranged between the inner barrel or / and the flow guide member and the barrel body. Different from the first flexible connecting member, the first flexible connecting member can be fixedly or detachably connected, and is optional. However, the second flexible connecting member is detachably connected, and at least has the following technical effects:

[0079] The second flexible connection part detachably and flexibly connects the inner cylinder and the flow guide part through the corresponding flexible connection points, so that the inner cylinder and the flow guide part can synchronously float up and down when the water level of the sewage tank changes, the relative height position is kept stable, tilting or position misplacement is avoided, and the continuous and stable circulation path is ensured. Meanwhile, the second flexible connection part can absorb the vibration impact generated by the water flow and aeration disturbance, prevent rigid collision or wear between the inner cylinder and the floating outer cylinder, and improve the stability and reliability of the device operation. In addition, the detachable connection structure facilitates subsequent maintenance, repair, replacement of the connection part or adjustment of the cylinder position, reduces the maintenance cost, and improves the convenience of device use and the ability to adapt to different tank types and operating conditions. More importantly, the sleeve position of each connection point can be adjusted according to the water level, sludge concentration, etc., so as to further adjust the height of each reaction zone and the interval distance between the inner cylinder or the flow guide part and the outer cylinder; although the scheme seems simple, it can achieve the technical effect of adjusting the space and reaction time of each reaction zone, adapt to the water level change and sludge concentration change of each sewage tank, ensure full and complete reaction of each reaction zone, and further improve the circulation efficiency and reaction effect. This improvement is made to adapt to the reaction process.

[0080] Preferably, as shown in Figure 1 the top of the floating support is higher than the liquid level;

[0081] the uppermost edge of the inner cylinder is lower than the liquid level;

[0082] the uppermost edge of the cylinder body is higher than the uppermost edge of the inner cylinder.

[0083] In this embodiment, the top of the floating support is higher than the liquid level, and the uppermost edge of the inner cylinder is lower than the liquid level, which can ensure that sewage continuously flows into the inner cylinder to form a stable circulating liquid flow, promote the full contact between the sewage and the granular sludge, and achieve efficient pollutant removal. The uppermost edge of the cylinder body is higher than the uppermost edge of the inner cylinder, so that the cylinder can play a role in guiding and limiting the flow when the water flow is disturbed and the liquid level fluctuates, preventing the liquid from directly overflowing the inner cylinder, keeping the liquid flow distribution uniform and stable, and improving the circulation efficiency and stable growth of the granular sludge in the reaction device. At the same time, this height structure is matched to facilitate the continuous and stable operation of the device at different water levels.

[0084] More preferably, as shown in Figure 1 and Figure 2 the cylinder body has a configuration of an open upper end and a bottom end with a small hole 27;

[0085] The aeration part 4 is provided with an aeration disc 41 at the top, which extends into the bottom small hole and is located below the flow guide part 3.

[0086] In this embodiment, the cylinder body can slightly shake under the disturbance of liquid flow or aeration member, so that sewage flows into the cylinder body from the upper end freely, forms a continuous and stable water inlet channel, and helps the sewage to quickly enter the circulating path. The small holes at the bottom end of the cylinder body can make part of the mature large particle sludge flow out from the small holes at the bottom end under the action of liquid flow circulation and shaking, mix into the sewage tank and uniformly diffuse, realize the rapid migration and inoculation of granular sludge and attached functional bacteria, and accelerate the granulation process in the sewage tank. The aeration disc extends into the small hole at the bottom end and is located below the flow guide member, so that the aeration airflow directly acts on the bottom area inside the cylinder body, a stable upward flow field is formed in the through hole and the inner reaction chamber, and a stable downward flow field is formed in the outer reaction chamber, further enhancing the mixing and circulating effect of sewage and granular sludge.

[0087] Preferably, as Figure 1 , the cylinder body comprises four layers of structures arranged from top to bottom in sequence; the layered structures are detachably connected;

[0088] The first layer of the cylinder body is connected with the upper edge of the inner cylinder;

[0089] The second layer of the cylinder body is connected with the lower edge of the inner cylinder;

[0090] The third layer of the cylinder body is connected with the flow guide member;

[0091] The fourth layer of the cylinder body is located below the flow guide member.

[0092] In this embodiment, the cylinder body adopts four layers of structures arranged from top to bottom in sequence, and the layers are detachably connected, so as to flexibly adjust the height of the cylinder body and replace and maintain each layer of structure according to different water levels and sewage treatment requirements, and improve the adaptability and maintenance convenience of the device. The first layer is connected with the upper edge of the inner cylinder, and the second layer is connected with the lower edge of the inner cylinder, which helps to stably fix the position of the inner cylinder, prevents displacement or tilting under the disturbance of liquid flow and aeration, and ensures the continuity of the circulating path; the third layer is connected with the flow guide member, and the fourth layer is located below the flow guide member, which is compact in structure and facilitates the overall installation, transportation and processing and manufacturing of the device. When the water-permeable membrane of a certain layer is damaged, it can be quickly disassembled and installed, further improving the maintainability of the device. Specifically, the first layer of the cylinder body is connected with the outer side of the upper edge of the inner cylinder, and the radial distance is less than 20 cm; the second layer of the cylinder body is connected with the outer side of the lower edge of the inner cylinder, and the radial distance is less than 20 cm; the third layer of the cylinder body is connected with the lowermost end of the flow guide member, and the radial distance is less than 10 cm; the fourth layer of the cylinder body is located below the lowermost end of the flow guide member, and the vertical distance is less than 50 cm; the inner diameter of the fourth layer of the cylinder body is 15 to 30 cm.

[0093] Preferably, as Figure 1 , the first layer of the cylinder body, the second layer of the cylinder body and the third layer of the cylinder body are hollow cylindrical structures;

[0094] The fourth layer cylinder body bottom is tapered to form a bottom hole 27, and a first flexible connecting piece 23 is arranged at the edge of the bottom hole 27 and fixed to the bottom of the sewage tank through the first flexible connecting piece 23.

[0095] In this embodiment, the first layer cylinder body, the second layer cylinder body and the third layer cylinder body are hollow cylindrical structures for accommodating the inner cylinder and the flow guide, which are light in structure and good in rigidity, facilitating stable liquid flow and overall weight reduction of the device. The fourth layer cylinder body bottom is tapered to form a bottom hole, and a plurality of first flexible connecting pieces are arranged at the edge of the bottom hole and fixed to the bottom of the sewage tank through the flexible connecting pieces arranged at intervals, so that the device can be stably fixed and moderately absorb vibration under aeration and liquid flow disturbance. At the same time, the first flexible connecting pieces are distributed at intervals, which enhances the connection strength and overall stability and ensures long-term stable operation of the device.

[0096] On the other hand, the present application also provides a sewage treatment system, as shown in the accompanying drawings, comprising a sewage tank, a floating vertical flow reaction device and an aeration member 4. Figure 4

[0097] The floating vertical flow reaction device is arranged in the sewage tank and is any of the floating vertical flow reaction devices of the present application.

[0098] The aeration member is arranged at the bottom of the sewage tank and located at the lower center position of the floating vertical flow reaction device, and is used for upward aeration.

[0099] In this embodiment, a sewage treatment system is provided, and the floating vertical flow reaction device is arranged in the sewage tank, so that the device can automatically adjust the height with the water level change, ensuring stable operation, and at the same time, the floating structure and vertical flow circulation are used to effectively promote the full mixing and contact of sewage and granular sludge, and improve the pollutant removal efficiency. In addition, the reaction device can realize uniform diffusion of granular sludge and functional bacteria in the sewage tank, promote granulation of sludge and continuous enrichment of functional bacteria, and further improve the treatment efficiency and effluent quality.

[0100] Preferably, as shown in the accompanying drawings, in the sewage treatment system, the floating vertical flow reaction device 6 is one or more. Figure 4

[0101] The plurality of floating vertical flow reaction devices are flexibly connected and positionally fixed to the sewage tank through the third flexible connecting piece 5.

[0102] Each floating vertical flow reaction device has a relatively independent internal circulation flow state and biochemical reaction environment in the sewage treatment system, and also continuously exchanges with the mixed liquid outside through the upper opening and the bottom hole of the floating outer cylinder; when working, the fluid continuously circulates by rising in the inner reaction cavity, passing around the top end of the inner cylinder, descending in the outer reaction cavity and passing around the lower end of the flow guide or through the sieve holes on the side wall. ​​

[0103] In this embodiment, a sewage treatment system is given, and a plurality of floating vertical flow reaction devices form a multi-point treatment unit in the sewage treatment tank, and through the synergistic effect between each other, the uniform distribution and sufficient mixing of sewage are realized. Due to the moderate shaking of the first flexible connecting piece, the second flexible connecting piece, the third flexible connecting piece and the floating outer cylinder in the sewage, the floc sludge, the small particle size granular sludge and the mature large particle size granular sludge cultivated in each device, and the rich functional flora, diffuse, migrate and cross inoculate between different devices, form a rich and stable microbial community ecosystem, drive the activity of functional flora to improve, quickly adapt and degrade complex organic matter, and significantly improve the overall treatment efficiency of sewage. It is worth noting that the first flexible connecting piece is fixedly connected with the bottom of the cylinder body and the sewage tank, and the third flexible connecting piece is connected with a plurality of floating vertical flow reaction devices through the side wall or the top of the cylinder body. In addition, the design of the flexible connecting structure and the floating outer cylinder effectively realizes the lightweight of the floating vertical flow reaction device and the sewage treatment system, significantly reduces the manufacturing and transportation cost, and improves the convenience of installation and maintenance. At the same time, through reasonable distribution of buoyancy and flexible connection, the structure can effectively absorb and buffer the shaking and vibration caused by water flow and aeration disturbance, reduce the instability problem that may be caused by the lightweight structure, ensure the structural stability and safety of the device in the running process, prolong the service life of the equipment, and improve the reliability of the overall operation of the system. Specifically, as shown in Figure 4 , the plurality of floating vertical flow reaction devices are divided into several groups, each group has several, are arranged at equal intervals, and are connected through the third flexible connecting piece to facilitate installation and maintenance. More specifically, as shown in Figure 4 , the plurality of floating vertical flow reaction devices are divided into 3 groups, each group has 3, are arranged at equal intervals, and are connected through the third flexible connecting piece to facilitate installation and maintenance.

[0104] The above sewage treatment system is based on the above floating vertical flow reaction device, and the combination of technical effects and technical features is not described here. The above-described embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as limiting the scope of the patent. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application.

Claims

1. A floating vertical flow reaction device, characterized in that, include: Inner cylinder, floating outer cylinder and flow guide; the inner cylinder and floating outer cylinder are nested together to form an inner reaction chamber located inside the inner cylinder and an outer reaction chamber located between the inner cylinder and the floating outer cylinder; A flow guide, connected to the axial bottom end of the inner cylinder, includes: a sieve hole provided on the upper side wall of the flow guide; and a through hole provided in the flow guide; the size of the sieve hole is smaller than the size of the through hole; a floating outer cylinder includes: a cylinder body, a floating support, a first flexible connector, and a second flexible connector; The cylinder body is fitted around the inner cylinder and the flow guide; it includes a water-permeable membrane and a connecting skeleton; the water-permeable membrane is provided with micropores; the connecting skeleton is set inside the water-permeable membrane to support the water-permeable membrane and form a hollow enclosure structure; Floating support components are arranged around the periphery of the cylinder body; The first flexible connector has one end connected to the bottom of the cylinder body and the other end fixed to the bottom of the sewage tank; The outer wall of the inner cylinder and / or the guide is provided with a first flexible connection point; the inner wall of the cylinder body is provided with a second flexible connection point corresponding to the first flexible connection point; the first end of the second flexible connector is detachably connected to the first flexible connection point, and the second end is detachably connected to the second flexible connection point. The top of the floating support is above the liquid surface; the uppermost edge of the inner cylinder is below the liquid surface; the uppermost edge of the cylinder body is above the uppermost edge of the inner cylinder.

2. The floating vertical flow reaction device according to claim 1, characterized in that, The floating support includes several floating components, which are spaced apart from top to bottom on the outside of the cylinder body.

3. The floating vertical flow reaction device according to claim 2, characterized in that, The floating support also includes: a mounting bracket; the mounting bracket includes a crossbeam and a longitudinal beam; The longitudinal beams are vertically installed on the outside of the cylindrical body; The crossbeams are several outer rings that fit the shape of the outer side of the cylinder body, and are spaced apart from top to bottom on the longitudinal beams; Several floating components are respectively set on the corresponding outer ring.

4. The floating vertical flow reactor according to any one of claims 1 to 3, characterized in that, The cylinder body includes: a four-layer structure arranged sequentially from top to bottom; the layers are detachably connected; The first layer of the cylinder body is connected to the upper edge of the inner cylinder; The second-layer cylinder body is connected to the lower edge of the inner cylinder; The third-layer cylinder body is connected to the flow guide component; The fourth layer of the cylinder body is located below the flow guide.

5. The floating vertical flow reaction device according to claim 4, characterized in that, The first, second, and third cylindrical bodies are hollow cylindrical structures. The bottom of the fourth layer cylinder body gradually narrows to form a small hole at the bottom. The edge of the small hole at the bottom is provided with a first flexible connector, and it is fixed to the bottom of the sewage tank through the first flexible connector.

6. A wastewater treatment system, characterized in that, include: Wastewater treatment tanks, floating vertical flow reactors, and aeration components; A floating vertical flow reaction device is installed in a sewage tank, and is the floating vertical flow reaction device according to any one of claims 1 to 5; The aeration element is installed at the bottom of the sewage tank and is located at the lower center of the floating vertical flow reaction device for upward aeration.

7. The wastewater treatment system according to claim 6, characterized in that, The floating vertical flow reactor may be one or more; it may also include a third flexible connector; Multiple floating vertical flow reaction devices are flexibly connected to and fixed to the sewage tank via a third flexible connector; Each floating vertical flow reactor has a relatively independent internal circulation flow pattern and biochemical reaction environment in the wastewater treatment system. It also continuously exchanges with the external mixed liquid through the openings on the upper edge and bottom of the floating outer cylinder. During operation, the fluid rises in the inner reaction chamber, bypasses the top of the inner cylinder, descends in the outer reaction chamber, and flows around the lower end of the guide or through the sieve holes on the side wall for continuous circulation.

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