Reaction precipitation and reflux integrated biochemical tower

Abstract

The present application relates to a kind of reaction precipitation and reflux integrated biochemical tower, including reaction tower, sedimentation tank, sludge reflux component, water inlet component and aeration component, sedimentation tank is built-in at the upper position of reaction tower, the inner wall of the top of sedimentation tank is formed with outlet weir, the outer wall of sedimentation tank is formed with the water distribution weir that is connected with reaction tower and sedimentation tank, sludge reflux component includes reflux pipe and steady flow ball, the top of reflux pipe is connected with the bottom of sedimentation tank, the bottom of reflux pipe extends to the bottom of reaction tower, steady flow ball is fixedly arranged at the bottom of reaction tower and is set opposite to reflux pipe, water inlet component one end is connected with sewage, and the other end extends to reaction tower and is set to steady flow ball, aeration component is installed in the inner bottom wall of reaction tower;Water flow in reaction tower is introduced into sedimentation tank and carries out sedimentation reaction, sludge exported from reflux pipe is fully mixed with sewage sent by water inlet component, finally impact on steady flow ball, spread to all directions, complete aerobic reaction along with aeration of aeration component.

Description

Technical Field

[0001] This invention relates to the field of water treatment technology, and in particular to a biochemical tower that integrates reaction, sedimentation and reflux. Background Technology

[0002] With population growth and increasing urbanization, urban land resources are becoming increasingly scarce, and the rapid rise in land costs has prompted people to consider the necessity of conserving land. On the other hand, according to Henry's Law, the solubility of oxygen in water is directly proportional to its partial pressure, which in turn is directly proportional to water depth. Therefore, to reduce land area, the combined construction of biological aerobic aeration tanks and secondary sedimentation tanks has become a development trend. Simultaneously, to improve oxygen solubility and oxygenation efficiency, the height of the tanks is also gradually increasing, shifting from aeration tanks to reaction towers.

[0003] Since reaction towers typically have bottom inlet and top outlet, with aerators located at the bottom and secondary sedimentation tanks at the top, the sludge separated by sedimentation in the secondary sedimentation tank needs to return to the bottom of the reaction tower to replenish the biomass of the biological system and maintain a stable activated sludge concentration. The descending sludge is often interfered with by the upward airflow from the aerators, affecting the sedimentation and separation efficiency or hindering the sludge from returning to the bottom of the reaction tower. This results in a phenomenon where the activated sludge concentration is high at the top and low at the bottom of the reaction tower, which is not conducive to improving the efficiency of biological treatment. Summary of the Invention

[0004] In view of this, it is necessary to provide a reaction sedimentation and reflux integrated biological treatment tower to solve the problem that the downward sludge is interfered with by the upward airflow generated by the aerator, which affects the sedimentation and separation efficiency or hinders the sludge from returning to the bottom of the reaction tower, thus reducing the efficiency of biological treatment.

[0005] This invention provides an integrated reaction, sedimentation, and reflux biochemical tower, comprising a reaction tower, a sedimentation tank, a sludge reflux assembly, an inlet assembly, and an aeration assembly. The sedimentation tank is located at the top of the reaction tower, with an effluent weir formed on the inner wall of the top of the sedimentation tank and a distribution weir connecting the reaction tower and the sedimentation tank on the outer wall of the sedimentation tank. The sludge reflux assembly includes a reflux pipe and a flow stabilizing ball. The top of the reflux pipe is connected to the bottom of the sedimentation tank, and the bottom of the reflux pipe extends to the bottom of the reaction tower. The flow stabilizing ball is fixedly installed at the bottom of the reaction tower and faces the reflux pipe. Sludge discharged through the reflux pipe is blocked from spreading to the surrounding area by the flow stabilizing ball. One end of the inlet assembly is connected to wastewater, and the other end extends to the reaction tower and points towards the flow stabilizing ball, so as to allow the wastewater to fully mix with the sludge discharged through the reflux pipe. The aeration assembly is installed on the inner bottom wall of the reaction tower.

[0006] Furthermore, the sedimentation tank includes a conical structure, a first annular structure, and a second annular structure connected sequentially from bottom to top. The conical structure gradually expands in a vertically upward direction, and its bottom is connected to the reflux pipe. The diameter of the first annular structure is larger than that of the second annular structure. The first annular structure and the second annular structure are connected by a connecting ring, which has multiple water distribution holes. The first annular structure, the connecting ring, and the second annular structure form the water distribution weir. The top of the second annular structure is located above the liquid level of the reaction tower, and the inner wall of the second annular structure forms the effluent weir.

[0007] Furthermore, it also includes multiple water distribution pipes corresponding one-to-one with multiple water distribution holes, the multiple water distribution pipes being evenly arranged around the water distribution weir, and the bottom end of the water distribution pipes extending to the bottom of the first annular structure.

[0008] Furthermore, the reflux pipe is located at the center of the reaction tower and the sedimentation tank.

[0009] Furthermore, the diameter of the flow stabilizing ball is twice the diameter of the return pipe.

[0010] Furthermore, the distance from the bottom of the flow stabilizing ball to the inner bottom wall of the reaction tower is 40-50 cm, and the distance from the top of the flow stabilizing ball to the bottom of the reflux pipe is 15-25 cm.

[0011] Furthermore, the water inlet assembly includes an inlet pipe and a water distribution sleeve. The water distribution sleeve is coaxially sleeved on the return pipe. The top of the water distribution sleeve is closed. One end of the inlet pipe is connected to sewage, and the other end of the inlet pipe extends into the reaction tower and is connected to the water distribution sleeve.

[0012] Furthermore, the water inlet pipe is horizontally positioned and flush with the top of the water distribution sleeve, and the bottom of the water distribution sleeve is flush with the bottom of the return pipe.

[0013] Furthermore, the aeration assembly includes an aeration pipe and a plurality of aeration heads installed on the top of the aeration pipe. The plurality of aeration heads are evenly arranged around the circumference of the aeration pipe. One end of the aeration pipe is connected to a blower, and the other end of the aeration pipe extends into the reaction tower.

[0014] Furthermore, there are multiple aeration pipes, all of which are annular pipes. The multiple aeration pipes are coaxially arranged with the flow stabilizing ball as the center, so that the multiple aeration heads are evenly arranged at the bottom of the reaction tower.

[0015] Compared with existing technologies, the water in the reaction tower is introduced into the sedimentation tank through the distribution weir for sedimentation reaction. The supernatant is discharged from the effluent weir, and the settled sludge moves downward and returns to the bottom of the reaction tower through the return pipe. The sludge discharged from the return pipe is fully mixed with the sewage fed into the influent component and finally impacts the flow stabilizer ball, spreading in all directions. The concentration of activated sludge in the reaction tower is evenly distributed. With the aeration component, the aerobic reaction is completed. The setting of the return pipe and flow stabilizer ball effectively isolates the airflow in the sludge return process, prevents the air generated during the aeration process from entering the sludge return pipe, avoids the adverse effects of water flow turbulence on the sedimentation and separation process, and maintains the stable state of the system. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the integrated reaction precipitation and reflux biochemical tower provided in an embodiment of the present invention. Detailed Implementation

[0017] 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.

[0018] like Figure 1 As shown, the present invention provides an integrated reaction, sedimentation, and reflux biochemical tower, comprising a reaction tower 100, a sedimentation tank 200, a sludge reflux assembly 300, an inlet assembly 400, and an aeration assembly 500. The sedimentation tank 200 is located above the reaction tower 100. An effluent weir 210 is formed on the inner wall of the top of the sedimentation tank 200, and a water distribution weir 220 connecting the reaction tower 100 and the sedimentation tank 200 is formed on the outer wall of the sedimentation tank 200. The sludge reflux assembly 300 includes a reflux pipe 310 and a flow stabilizing ball 320. The top of the reflux pipe 310... The bottom of the return pipe 310 is connected to the bottom of the sedimentation tank 200 and extends to the bottom of the reaction tower 100. The flow stabilizing ball 320 is fixedly installed at the bottom of the reaction tower 100 and is positioned directly opposite the return pipe 310. The sludge discharged through the return pipe 310 is blocked from spreading to the surrounding area by the flow stabilizing ball 320. One end of the water inlet component 400 is connected to the sewage, and the other end extends to the reaction tower 100 and is positioned towards the flow stabilizing ball 320 so that the sewage and the sludge discharged through the return pipe 310 can be fully mixed. The aeration component 500 is installed on the inner bottom wall of the reaction tower 100.

[0019] During implementation, the water in the reaction tower 100 is introduced into the sedimentation tank 200 through the distribution weir 220 for sedimentation reaction. The supernatant is discharged from the effluent weir 210, and the settled sludge moves downward and returns to the bottom of the reaction tower 100 through the return pipe 310. The sludge discharged from the return pipe 310 is fully mixed with the sewage sent in by the inlet component 400 and finally impacts the flow stabilizing ball 320 and spreads in all directions. The concentration of activated sludge in the reaction tower 100 is evenly distributed. With the aeration component 500 aeration, the aerobic reaction is completed. The setting of the return pipe 310 and the flow stabilizing ball 320 effectively isolates the airflow in the sludge return process, prevents the air generated during the aeration process from entering the return pipe 310, avoids the adverse effects of water flow turbulence on the sedimentation separation process, and maintains the stable state of the system.

[0020] In this embodiment, the reaction tower 100 is a biological aeration tank, providing the necessary environment for microorganisms to complete aerobic reactions. The increased height and water depth of the reaction tower 100 improve oxygen solubility and oxygen utilization efficiency, thus contributing to energy conservation.

[0021] It is understandable that the reaction tower 100 can be flexibly selected in various shapes such as circular, square, and polygonal, according to specific needs and design concepts, to meet the functional requirements and aesthetic standards of different scenarios. In this technical solution and accompanying drawings, for ease of understanding and explanation, a circular reaction tower 100 is used as an example to elaborate on the relevant description.

[0022] The sludge-water mixture that has completed the aerobic reaction flows into the sedimentation tank 200 in this embodiment. The sedimentation process is completed in the sedimentation tank 200. The supernatant is discharged from the effluent weir 210, and the settled sludge moves downward and returns to the bottom of the reaction tower 100 through the return pipe 310.

[0023] In one embodiment, the sedimentation tank 200 includes a conical structure, a first annular structure, and a second annular structure connected sequentially from bottom to top. The conical structure gradually expands in the vertically upward direction. The bottom of the conical structure is connected to the return pipe 310. The diameter of the first annular structure is larger than the diameter of the second annular structure. The first annular structure and the second annular structure are connected by a connecting ring. The connecting ring has multiple water distribution holes. A water distribution weir 220 is formed between the first annular structure, the connecting ring, and the second annular structure. The top of the second annular structure is located above the liquid level of the reaction tower 100. An outlet weir 210 is formed on the inner wall of the second annular structure.

[0024] This embodiment also includes multiple water distribution pipes 230 corresponding to multiple water distribution holes. The multiple water distribution pipes 230 are evenly arranged around the water distribution weir 220, and the bottom end of the water distribution pipes 230 extends to the bottom of the first annular structure. This allows the water flow to accurately enter the key area of ​​sedimentation and separation, laying a good foundation for subsequent treatment steps and ensuring the smooth progress and efficient implementation of the entire sedimentation and separation process.

[0025] In this embodiment, the sludge return assembly 300 is a structure that guides the sludge separated from the sedimentation tank 200 to the bottom of the reaction tower 100.

[0026] In one embodiment, the reflux pipe 310 is located at the center of the reaction tower 100 and the sedimentation tank 200.

[0027] In one embodiment, the diameter of the flow stabilizing ball 320 is twice the diameter of the return pipe 310.

[0028] In one embodiment, the distance from the bottom of the flow stabilizing ball 320 to the inner bottom wall of the reaction tower 100 is 40-50 cm, and the distance from the top of the flow stabilizing ball 320 to the bottom of the reflux pipe 310 is 15-25 cm. The flow stabilizing ball 320 can be fixedly connected to the reaction tower 100 by means of a bracket.

[0029] The material used for the current stabilizing sphere 320 can be a plastic, stainless steel, or aluminum alloy that offers good cost-effectiveness, strength, and corrosion resistance. Furthermore, the current stabilizing sphere 320 can be a solid sphere or a hollow sphere that achieves a certain strength, depending on the specific requirements.

[0030] The water inlet assembly 400 in this embodiment includes an inlet pipe 410 and a water distribution sleeve 420. The water distribution sleeve 420 is coaxially sleeved on the return pipe 310, and the top of the water distribution sleeve 420 is closed. One end of the inlet pipe 410 is connected to sewage, and the other end of the inlet pipe 410 extends into the reaction tower 100 and is connected to the water distribution sleeve 420. The water distribution sleeve 420 allows the inlet water to flow evenly to the flow stabilizing ball 320 and mix evenly with the sludge discharged from the return pipe 310.

[0031] In one embodiment, the inlet pipe 410 is horizontally positioned and flush with the top of the distribution sleeve 420, while the bottom of the distribution sleeve 420 is flush with the bottom of the return pipe 310. The flush alignment of the top of the inlet pipe 410 with the top of the distribution sleeve 420 allows for a smooth transition of water flow and a tight, coordinated connection.

[0032] The aeration assembly 500 in this embodiment includes an aeration pipe and multiple aeration heads installed on the top of the aeration pipe. The multiple aeration heads are evenly arranged around the aeration pipe. One end of the aeration pipe is connected to a blower, and the other end of the aeration pipe extends into the reaction tower 100.

[0033] In one embodiment, there are multiple aeration pipes, all of which are annular pipes. The multiple aeration pipes are coaxially arranged with the flow stabilizing ball 320 as the center, so that the multiple aeration heads are evenly arranged at the bottom of the reaction tower 100.

[0034] The aeration head has an EPDM diaphragm and an ABS disc. The diaphragm has uniformly opened holes with a diameter of 80-100μm, and the air is supplied by a blower.

[0035] Working Principle: When sludge falls from the return pipe 310 and impacts the flow stabilizing ball 320, its unique structure and function allow it to spread evenly in all directions. Combined with the action of the water distribution sleeve 420 above, this achieves rapid and uniform mixing of sludge and wastewater, effectively avoiding the problem of high concentrations of activated sludge at the top and bottom of the reaction tower 100. Simultaneously, the flow stabilizing ball 320 effectively isolates the outlet of the return pipe 310 from the rising air of the aeration system. The descending sludge not only smoothly returns to the bottom of the reaction tower 100 but also prevents air generated by the aeration component 500 from entering the return pipe 310, avoiding sludge floating in the sedimentation separation zone due to sludge floating in the pipe.

[0036] Compared with existing technologies: 1) Compared with ordinary biological aeration tanks, the increased height and water depth of the reaction tower 100 improve oxygen solubility and oxygen utilization efficiency, which is conducive to energy saving; 2) Combining the reaction tower 100 and sedimentation tank 200 and increasing the height of the reaction tower 100 reduces the equipment footprint, which is especially advantageous when space is limited; automatic sludge return eliminates the investment and operating costs of sludge return pumps; the overall construction is relatively simple, which can shorten the project construction cycle to a certain extent and save construction and labor costs.

[0037] 3) The arrangement of the water distribution sleeves 420 ensures that the water flow is in full contact with the sludge on the same horizontal plane, avoiding localized obstruction or uneven water flow, which helps maintain the stability of the reaction system. In the wastewater treatment process, this design allows the influent and returned sludge to mix quickly and evenly, improving the treatment effect.

[0038] 4) The outlet of the water distribution pipe 230 extends almost into the conical structure. This design can better control the direction and distribution of mud and water, ensuring that the flow of mud and water in the funnel is more in line with the design requirements. This is conducive to improving the effect and accuracy of sedimentation and separation, and can also increase the compactness and continuity of the entire system, so that the water distribution process and the sedimentation and separation process are closely connected, thereby improving the stability and reliability of the overall operation.

[0039] 5) The installation of the flow stabilizing ball 320 effectively solves the problem of uneven sludge concentration distribution in the reaction tower 100. It can also effectively isolate the airflow in the return pipe 310, preventing air generated by the aeration component 500 from entering the return pipe 310, avoiding the adverse effects of water flow disturbance on the operation of the sedimentation and separation system, and maintaining the stable state of the system.

[0040] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A biochemical tower integrating reaction, precipitation, and reflux, characterized in that, include: Reaction tower; A sedimentation tank is built into the upper part of the reaction tower. The inner wall of the top of the sedimentation tank forms an outlet weir, and the outer wall of the sedimentation tank forms a distribution weir connecting the reaction tower and the sedimentation tank. The sludge return assembly includes a return pipe and a flow stabilizing ball. The top end of the return pipe is connected to the bottom of the sedimentation tank, and the bottom end of the return pipe extends to the bottom of the reaction tower. The flow stabilizing ball is fixedly installed at the bottom of the reaction tower and is positioned directly opposite the return pipe. The sludge discharged through the return pipe is blocked from spreading to the surrounding area by the flow stabilizing ball. The inlet assembly has one end connected to the sewage and the other end extending to the reaction tower and pointing towards the flow stabilizing ball, so that the sewage can be fully mixed with the sludge discharged from the return pipe. An aeration assembly is installed on the inner bottom wall of the reaction tower; The water inlet assembly includes an inlet pipe and a water distribution sleeve. The water distribution sleeve is coaxially sleeved on the return pipe. The top of the water distribution sleeve is closed. One end of the inlet pipe is connected to sewage, and the other end of the inlet pipe extends into the reaction tower and is connected to the water distribution sleeve. The inlet pipe is horizontally positioned and flush with the top of the water distribution sleeve, and the bottom of the water distribution sleeve is flush with the bottom of the return pipe.

2. The integrated reaction, precipitation, and reflux biochemical tower according to claim 1, characterized in that, The sedimentation tank includes a conical structure, a first annular structure, and a second annular structure connected sequentially from bottom to top. The conical structure gradually expands in a vertically upward direction. The bottom of the conical structure is connected to the reflux pipe. The diameter of the first annular structure is larger than the diameter of the second annular structure. The first annular structure and the second annular structure are connected by a connecting ring. The connecting ring has multiple water distribution holes. The water distribution weir is formed between the first annular structure, the connecting ring, and the second annular structure. The top of the second annular structure is located above the liquid level of the reaction tower. The effluent weir is formed on the inner wall of the second annular structure.

3. The integrated reaction, precipitation, and reflux biochemical tower according to claim 2, characterized in that, It also includes multiple water distribution pipes corresponding to multiple water distribution holes, the multiple water distribution pipes being evenly arranged around the water distribution weir, and the bottom end of the water distribution pipes extending to the bottom of the first annular structure.

4. The integrated reaction, precipitation, and reflux biochemical tower according to claim 1, characterized in that, The reflux pipe is located at the center of the reaction tower and the sedimentation tank.

5. The integrated reaction, precipitation, and reflux biochemical tower according to claim 1, characterized in that, The diameter of the flow stabilizing ball is twice the diameter of the return pipe.

6. The integrated reaction, precipitation, and reflux biochemical tower according to claim 1, characterized in that, The distance from the bottom of the flow stabilizing sphere to the inner bottom wall of the reaction tower is 40-50 cm, and the distance from the top of the flow stabilizing sphere to the bottom of the reflux pipe is 15-25 cm.

7. The integrated reaction, precipitation, and reflux biochemical tower according to claim 1, characterized in that, The aeration assembly includes an aeration pipe and multiple aeration heads installed on the top of the aeration pipe. The multiple aeration heads are evenly arranged around the circumference of the aeration pipe. One end of the aeration pipe is connected to a blower, and the other end of the aeration pipe extends into the reaction tower.

8. The integrated reaction, precipitation, and reflux biochemical tower according to claim 7, characterized in that, The number of aeration pipes is multiple, and all of them are annular pipes. The multiple aeration pipes are coaxially arranged with the flow stabilizing ball as the center, so that the multiple aeration heads are evenly distributed at the bottom of the reaction tower.

Images