Sewage treatment station and transformation construction method thereof

Abstract

The invention relates to the technical field of building construction, in particular to a sewage treatment station and a transformation construction method thereof. The sewage treatment station comprises a sewage tank, a grating tank, an adjusting tank, a sedimentation tank and a disinfection tank which are sequentially communicated through pipelines, and further comprises an anoxic tank which is connected and arranged between the adjusting tank and the sedimentation tank through a pipeline, the anoxic tank is further connected with a contact oxidation tank through a pipeline, the contact oxidation tank comprises a contact frame, an aeration frame is arranged below the contact frame, the aeration frame is connected with a fan, aeration groups are arranged on the aeration frame, each aeration group comprises aeration pieces which are arranged in pairs, and each aeration piece is communicated with the aeration frame. The design of the aeration pieces enables oxygen to be uniformly distributed, dissolved oxygen in sewage is increased, the activity of aerobic microorganisms is promoted, and therefore decomposition of organic matter is accelerated, the sewage treatment efficiency is improved through the structure, the degradation capacity of pollutants in the sewage is enhanced by additionally arranging the aeration sets, and the sewage treatment efficiency is improved. And a deeper purification effect is realized.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a sewage treatment station and a reconstruction construction method thereof. Background Art

[0002] Hospital sewage has complex sources and is difficult to treat. With the development and construction of hospitals and the improvement of environmental protection standards, the amount of hospital sewage treatment has increased year by year, and the emission standards have become increasingly stringent. Some hospitals' supporting sewage treatment stations were built earlier, and often have problems such as simple processes, aging equipment, outdated facilities, and unreasonable selection of operating parameter standards. Therefore, they cannot meet the requirements of increasing sewage volume and stable discharge standards. Therefore, it is very important to upgrade hospital sewage treatment stations.

[0003] However, as the hospital continues to operate, the sewage treatment plant cannot be suspended during the upgrade and renovation process. Extremely strict requirements are placed on the construction technology and organization of the upgrade and renovation to ensure that sewage treatment operates normally during the renovation and renovation process and that the discharged water quality meets environmental protection policy requirements. Summary of the invention

[0004] The purpose of the present invention is to provide a sewage treatment station to solve the problem that the existing sewage treatment station cannot meet the increasing sewage volume; to provide a renovation construction method of the sewage treatment station to ensure the normal operation of sewage treatment during the renovation construction process without suspending the use of the sewage treatment station.

[0005] The present invention is achieved through the following technical solutions: A sewage treatment station comprises a sewage pool, a grille pool, a regulating pool, a sedimentation pool and a disinfection pool which are connected in sequence through pipelines, and also comprises an anoxic pool arranged between the regulating pool and the sedimentation pool through pipelines, the anoxic pool is also connected to a contact oxidation pool through pipelines, the contact oxidation pool comprises a contact frame, an aeration frame is arranged under the contact frame, the aeration frame is connected to a fan, an aeration group is arranged on the aeration frame, each aeration group comprises aeration plates arranged in pairs, and each of the aeration plates is connected to the aeration frame.

[0006] Furthermore, the aeration plate includes an aeration plate body and four contact areas arranged on the end surface of the aeration plate body, and the contact areas of each pair of aeration plates are arranged relatively to each other, and the contact areas include a plurality of contact plates, and the plurality of contact plates are connected to the interior of the aeration plate body, and the contact plates are also provided with a plurality of through holes.

[0007] Furthermore, the regulating tank is connected to an emergency accident tank through a pipeline.

[0008] Furthermore, a central tube is provided in the sedimentation tank.

[0009] Furthermore, the contact piece is bent and arranged on the end surface of the aeration plate body, and the flange parts of the contact piece all point to the geometric center of the aeration plate body.

[0010] Furthermore, a plurality of aeration heads are provided below the aeration rack, the aeration heads are connected to the output end of another fan, and the aeration heads are used to increase the content and retention time of oxygen in the aeration group.

[0011] Furthermore, the aeration head includes a tube seat detachably connected to the output end of the fan, the end of the tube seat is movably connected to a rotor, a plurality of hollow aeration balls are evenly spaced on the rotor, the interior of the aeration ball is connected to the tube seat through a channel, and a plurality of openings are obliquely opened on the end of the rotor. When oxygen passes through the tube seat, the rotor is driven to rotate on the tube seat through the openings, and the oxygen is ejected through the aeration balls.

[0012] A reconstruction construction method for a sewage treatment station comprises the following steps: step 1, reconstruction preparation, collecting sewage discharge information to establish a reconstruction database, the sewage discharge information comprising: actual discharge volume, sewage treatment capacity, sewage treatment process, operation status, water quality, volume and position of each water tank, and elevation of each pipeline; step 2, building construction, after step 1 is completed, designing a construction drawing according to the sewage discharge information, and completing the construction of the building structure according to the construction drawing; step 3, equipment installation, after step 2 is completed, completing the installation of the equipment and single-machine debugging according to the construction drawing; step 4, pipe network connection, after step 3 is completed, completing the pipe network connection between the reconstruction structure and the used structure according to the construction drawing; step 5, water tank reconstruction, after step 4 is completed, discharging sewage into the reconstruction structure; step 6, partition installation, after step 5 is completed, slotting the top of the sewage tank with the used structure, and setting a partition structure in the sewage tank; step 7, power supply reconstruction, after step 6 is completed, reconstructing the power supply system of the sewage treatment station; step 8, commissioning and operation, after step 7 is completed, completing the equipment commissioning of the sewage treatment station.

[0013] Step 1 also includes: Step 11, determining the capacity scale of the sewage treatment plant after transformation according to the actual discharge volume; Step 12, determining the treatment process after transformation according to the sewage treatment capacity and sewage treatment process; Step 13, determining the number of equipment and installation requirements after transformation according to the operation status and water quality conditions; Step 14, completing the construction drawing design according to the volume and position of each water pool and the elevation of each pipeline.

[0014] Step 4 also includes: step 41, determine the connection position and elevation in advance according to the construction drawing, and prepare the construction materials and personnel; step 42, after lowering the water level at the connection position, open a hole in the pool wall or cut and cut the pipeline at the connection position to complete the installation and connection of the new pipeline.

[0015] Compared with the prior art, the present invention has the following advantages and beneficial effects: 1. The present invention adds an anoxic tank between the regulating tank and the sedimentation tank, and connects it to the contact oxidation tank. The contact oxidation tank is provided with a contact rack and an aeration rack, and an aeration group is arranged on the aeration rack. Each aeration group includes aeration plates arranged in pairs. The setting of the anoxic tank helps to promote the growth of microorganisms through the anoxic environment, and the microorganisms can effectively decompose organic matter in sewage; the aeration group in the contact oxidation tank provides oxygen through the fan, and the design of the aeration plate allows oxygen to be evenly distributed, increasing the dissolved oxygen in the sewage and promoting the activity of aerobic microorganisms, thereby accelerating the decomposition of organic matter. The above structure not only improves the efficiency of sewage treatment, but also enhances the ability to degrade pollutants in sewage by adding the setting of the aeration group, thereby achieving a deeper purification effect; 2. The arrangement of the contact sheet and the opening of the through hole of the present invention change the flow pattern of the fluid. In the absence of the contact sheet and the through hole, the fluid flows more evenly but the efficiency is lower. The design of the contact sheet and the through hole enables the fluid to generate eddies and turbulence when passing through the aeration sheet. The turbulence can promote the mixing between oxygen and sewage and increase the oxygen transfer rate. The dissolution process of oxygen is affected by fluid dynamics conditions. The turbulence can increase the contact frequency between oxygen and sewage, thereby increasing the dissolution rate of oxygen. The design of the contact sheet and the through hole enables oxygen to contact sewage more frequently when passing through the aeration sheet. 3. The design of the aeration head of the present invention realizes the dynamic distribution of oxygen in the sewage through the rotation of the rotor. This dynamic distribution helps to break the surface tension of the water body, making it easier for oxygen to dissolve into the sewage, thereby improving the oxygen transfer efficiency. In addition, the setting of the aeration head also helps to improve the uniformity of sewage treatment and avoid local hypoxia or oxygen oversaturation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings: Figure 1 It is a schematic diagram of the overall structure of the system of the present invention; Figure 2 It is a schematic diagram of the structure of the sedimentation tank and the regulating tank of the present invention; Figure 3 It is a schematic diagram of the internal structure of the contact oxidation tank of the present invention; Figure 4 It is a structural schematic diagram of the aeration group of the present invention; Figure 5 It is a schematic structural diagram of the aeration head of the present invention.

[0017] The reference numerals represent: 1- sewage pool, 2- screen pool, 3- regulating pool, 4- sedimentation pool, 5- disinfection pool, 6- anoxic pool, 7- contact oxidation pool, 8- emergency pool, 9- aeration head, 10- center tube; 71-contact frame, 72-aeration frame, 73-fan, 74-aeration group, 75-aeration sheet; 751-aeration plate body, 752-contact area, 753-contact sheet; 91-tube holder, 92-rotating head, 93-aeration ball, 94-opening. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments and drawings. The schematic implementation modes and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention. It should be noted that the present invention is already in the actual development and use stage.

[0019] Embodiment 1: Please refer to the attached Figures 1 to 5 A sewage treatment station includes a sewage pool 1, a grille pool 2, a regulating pool 3, a sedimentation pool 4 and a disinfection pool 5 which are connected in sequence through pipelines, and also includes an anoxic pool 6 arranged between the regulating pool 3 and the sedimentation pool 4 through a pipeline, and the anoxic pool 6 is also connected to a contact oxidation pool 7 through a pipeline, and the contact oxidation pool 7 includes a contact frame 71, an aeration frame 72 is arranged under the contact frame 71, and the aeration frame 72 is connected to a fan 73, and an aeration group 74 is arranged on the aeration frame 72, each aeration group 74 includes aeration sheets 75 arranged in pairs, and each aeration sheet 75 is connected to the aeration frame 72.

[0020] It should be noted that the existing hospital sewage treatment station has problems such as simple process, aging equipment, obsolete facilities and unreasonable selection of operating parameter standards due to its early construction time. There is also a problem that it cannot meet the growing sewage treatment volume and the improved environmental protection emission standards. In the prior art, hospital sewage treatment stations often adopt traditional treatment processes, including sewage tank 1, grid tank 2, regulating tank 3, sedimentation tank 4 and disinfection tank 5. Although these processes basically meet the needs of sewage treatment, with the expansion of hospital scale and the improvement of environmental protection requirements, these facilities can no longer meet the new treatment requirements. The sewage treatment station scheme in this embodiment is to add an anoxic tank 6 between the regulating tank 3 and the sedimentation tank 4, and connect it to the contact oxidation tank 7. The contact oxidation tank 7 is provided with a contact frame 71 and an aeration frame 72, and an aeration group 74 is arranged on the aeration frame 72. Each aeration group 74 includes an aeration sheet 75 arranged in pairs. The setting of the anoxic tank 6 helps to promote the growth of microorganisms through an anaerobic environment, and the microorganisms can effectively decompose organic matter in sewage.

[0021] The aeration group 74 in the contact oxidation tank 7 provides oxygen through the fan 73, and the design of the aeration sheet 75 allows the oxygen to be evenly distributed, increasing the dissolved oxygen in the sewage and promoting the activity of aerobic microorganisms, thereby accelerating the decomposition of organic matter. The above structure not only improves the efficiency of sewage treatment, but also enhances the degradation ability of pollutants in sewage by increasing the setting of the aeration group 74, achieving a deeper purification effect. The treatment capacity of the sewage treatment station has been significantly improved, ensuring that even when the amount of hospital sewage increases, it can still meet the discharge standards stably, while reducing the operating risks caused by aging equipment and obsolete facilities, improving the stability and reliability of sewage treatment, meeting the requirements of environmental protection policies, and playing a positive role in environmental protection.

[0022] It should be noted that the aeration sheet 75 includes an aeration plate body 751 and four contact areas 752 arranged on the end surface of the aeration plate body 751, and the contact areas 752 of each pair of aeration sheets 75 are arranged relatively, and the contact areas 752 include a plurality of contact sheets 753, and the plurality of contact sheets 753 are connected to the interior of the aeration plate body 751, and the contact sheets 753 are also provided with a plurality of through holes. It should also be noted that the aeration sheets 75 in the existing sewage treatment plants have the problems of simple design, low aeration efficiency, and uneven aeration resulting in unsatisfactory sewage treatment effect. In traditional sewage treatment plants, the design of the aeration sheets 75 is often relatively simple, and efficient oxygen exchange and distribution cannot be achieved, which limits the efficiency of sewage treatment, especially under high load conditions, uneven aeration will cause the activity of microorganisms in some areas to decrease due to lack of oxygen, affecting the effect of the entire sewage treatment process.

[0023] The aeration sheet 75 includes an aeration plate body 751 and four contact areas 752 arranged on the end surface of the plate body, and the contact areas 752 of each pair of aeration sheets 75 are arranged opposite to each other. Each contact area 752 includes a plurality of contact sheets 753, which are connected to the inside of the aeration plate body 751, and a plurality of through holes are opened on the contact sheets 753. The above structural design enables the aeration sheet 75 to form multiple oxygen exchange points during aeration, thereby increasing the surface area of ​​contact between oxygen and sewage and improving the oxygen transfer efficiency. When the fan 73 supplies air to the aeration group 74 through the aeration frame 72, the oxygen is evenly distributed into the sewage through the through holes on the contact sheets 753, achieving more efficient oxygen exchange and more uniform aeration effect, thereby promoting biological activity and improving the efficiency of sewage treatment.

[0024] It should also be noted that the provision of the contact sheet 753 and the opening of the through hole change the flow pattern of the fluid. In the absence of the contact sheet 753 and the through hole, the fluid flow is relatively uniform but the efficiency is low. The design of the contact sheet 753 and the through hole allows the fluid to generate eddies and turbulence when passing through the aeration sheet 75. The turbulence can promote the mixing between oxygen and sewage and increase the oxygen transfer rate. The dissolution process of oxygen is affected by fluid dynamic conditions. Turbulence can increase the contact frequency between oxygen and sewage, thereby increasing the dissolution rate of oxygen. The design of the contact sheet 753 and the through hole allows oxygen to contact sewage more frequently when passing through the aeration sheet 75, increasing the possibility of oxygen dissolution. In the traditional aeration system, there are some dead water areas, where the fluid flows slowly and the oxygen transfer efficiency is low. The design of the aeration sheet 75 makes the fluid flow more uniform by adding the contact sheet 753 and the through hole, reduces the formation of dead water areas, and thus improves the oxygen transfer efficiency of the entire system.

[0025] In this embodiment, it is more preferred that the regulating tank 3 is connected to the emergency accident tank 8 through a pipeline. Under normal operating conditions, the sewage enters the subsequent treatment process after being treated in the grille tank 2, the regulating tank 3, etc. In the event of an emergency, such as sewage leakage or a sudden increase in pollution load, the emergency accident tank 8 can be used as a temporary storage facility to receive excess or contaminated sewage. The above design allows operators to have enough time to adjust the treatment process or take other emergency measures, such as adding treatment agents, adjusting process parameters or performing equipment maintenance, without directly affecting the operation of the entire sewage treatment plant. The setting of the emergency accident tank 8 actually adds a buffer link in the sewage treatment process, which can protect the entire system from damage in an emergency and ensure the continuity and safety of sewage treatment.

[0026] It is more preferred in the present embodiment that a central tube 10 is provided in the sedimentation tank 4. The central tube 10, as a guide device, can change the water flow dynamics in the sedimentation tank 4, so that the water flow forms a vortex or a circulation in the sedimentation tank 4, and increases the contact opportunity between the suspended particles and the bottom of the sedimentation tank 4, thereby improving the sedimentation efficiency. The design of the central tube 10 can also promote the centralized sedimentation of sludge, reduce the dispersion and floating of sludge in the tank, and make the sludge easier to collect and discharge. During the sedimentation process, the central tube 10 guides the water flow to descend along the spiral of the tube wall to the bottom of the tank, which increases the distance and time for the suspended particles to settle, so that the particles have more opportunities to settle to the bottom of the tank by gravity, and also reduces the disturbance of the water flow to the settled sludge, avoiding the re-suspension of the sludge.

[0027] In this embodiment, it is more preferred that the contact sheet 753 is bent and arranged on the end face of the aeration plate body 751, and the flange parts of the contact sheet 753 all point to the geometric center of the aeration plate body 751. The aeration sheet 75 includes an aeration plate body 751 and four contact areas 752 arranged on the end face of the aeration plate body 751, and the contact areas 752 of each pair of aeration sheets 75 are arranged opposite to each other, and the contact areas 752 include a plurality of contact sheets 753, and the plurality of contact sheets 753 are all connected to the interior of the aeration plate body 751, and the contact sheets 753 are also provided with a plurality of through holes. The contact sheet 753 is bent and arranged on the end face of the aeration plate body 751, and the flange parts of the contact sheet 753 all point to the geometric center of the aeration plate body 751. The above design enables the aeration sheet 75 to form multiple oxygen exchange points during aeration, increases the surface area of ​​oxygen contacting sewage, and improves the oxygen transfer efficiency. When the fan 73 supplies air to the aeration group 74 through the aeration rack 72, oxygen is evenly distributed into the sewage through the through holes on the contact sheet 753, achieving more efficient oxygen exchange and more uniform aeration effect, thereby promoting the activity of microorganisms and improving the efficiency of sewage treatment.

[0028] It should be noted that a plurality of aeration heads 9 are also provided below the aeration rack 72, and the aeration heads 9 are connected to the output end of another fan 73, and the aeration heads 9 are used to increase the content and retention time of oxygen on the aeration group 74. In traditional sewage treatment processes, the aeration system can often only provide basic oxygen supply, which is difficult to meet the demand for oxygen in sewage treatment under high load or special conditions, especially during peak hours or when treating high-concentration organic wastewater. Insufficient oxygen supply will limit the activity of microorganisms and affect the sewage treatment effect. The aeration head 9 is connected to the output end of another fan 73 to increase the content and retention time of oxygen on the aeration group 74. The design of the aeration head 9 includes a pipe seat 91 that is detachably connected to the output end of the fan 73, and a rotating head 92 is movably connected to the end of the pipe seat 91. A plurality of hollow aeration balls 93 are evenly spaced on the rotating head 92, and the interior of the aeration ball 93 is connected to the pipe seat 91 through a channel, and a plurality of openings 94 are inclined at the end of the rotating head 92. When oxygen passes through the pipe seat 91, the opening 94 drives the rotor 92 to rotate on the pipe seat 91, and at the same time, the oxygen is ejected through the aeration ball 93. The above structural design not only increases the supply of oxygen, but also realizes the dynamic distribution of oxygen in the sewage through the rotation of the rotor 92, thereby improving the oxygen transfer efficiency and uniformity. The design of the aeration head 9 realizes the dynamic distribution of oxygen in the sewage through the rotation of the rotor 92. This dynamic distribution helps to break the surface tension of the water body, making it easier for oxygen to dissolve into the sewage, thereby improving the oxygen transfer efficiency. In addition, the setting of the aeration head 9 also helps to improve the uniformity of sewage treatment and avoid local hypoxia or oxygen oversaturation.

[0029] It should be noted that the aeration head 9 includes a tube seat 91 detachably connected to the output end of the fan 73, a rotor 92 is movably connected to the end of the tube seat 91, and a plurality of hollow aeration balls 93 are evenly spaced on the rotor 92. The interior of the aeration balls 93 is connected to the tube seat 91 through a channel, and a plurality of openings 94 are obliquely opened at the end of the rotor 92. When oxygen passes through the tube seat 91, the rotor 92 is driven to rotate on the tube seat 91 through the openings 94, and oxygen is ejected through the aeration balls 93. When oxygen passes through the tube seat 91, the rotor 92 is driven to rotate on the tube seat 91 through the openings 94, and oxygen is ejected through the aeration balls 93. The above design utilizes the rotational motion of the rotor 92 to increase the contact time and contact area between oxygen and sewage, and improve the dissolution efficiency of oxygen. The rotation of the rotor 92 allows the oxygen to form a dynamic airflow when it is ejected. This dynamic airflow can more effectively disperse the oxygen into the sewage, increase the contact opportunities between the oxygen and the sewage, and thus improve the solubility and retention time of the oxygen.

[0030] Embodiment 2: This embodiment only describes the parts that are different from the embodiment 1. Specifically, a reconstruction construction method for a sewage treatment station includes the following steps: step 1, reconstruction preparation, collecting sewage discharge information to establish a reconstruction database, the sewage discharge information includes: actual discharge volume, sewage treatment capacity, sewage treatment process, operation status, water quality, volume and position of each water tank, and elevation of each pipeline; step 2, building construction, after step 1 is completed, design a construction drawing according to the sewage discharge information, and complete the construction of the building structure according to the construction drawing; step 3, equipment installation, after step 2 is completed, complete the installation of the equipment and single-machine debugging according to the construction drawing; step 4, pipe network connection, after step 3 is completed, complete the pipe network connection between the reconstruction structure and the used structure according to the construction drawing; step 5, pool reconstruction, after step 4 is completed, discharge the sewage into the reconstruction structure; step 6, partition installation, after step 5 is completed, groove the top of the sewage tank 1 of the used structure, and set a partition structure in the sewage tank 1; step 7, power supply reconstruction, after step 6 is completed, the power supply system of the sewage treatment station is reconstructed; step 8, commissioning and operation, after step 7 is completed, the equipment commissioning of the sewage treatment station is completed.

[0031] Step 1 also includes: Step 11, determining the capacity scale of the sewage treatment plant after transformation according to the actual discharge volume; Step 12, determining the treatment process after transformation according to the sewage treatment capacity and sewage treatment process; Step 13, determining the number of equipment and installation requirements after transformation according to the operation status and water quality conditions; Step 14, completing the construction drawing design according to the volume and position of each water pool and the elevation of each pipeline.

[0032] Step 4 also includes: step 41, determine the connection position and elevation in advance according to the construction drawing, and prepare the construction materials and personnel; step 42, after lowering the water level at the connection position, open a hole 94 in the pool wall or cut and cut the pipeline at the connection position to complete the installation and connection of the new pipeline.

[0033] It should be noted that, during the upgrading and transformation of the hospital sewage treatment station, it is difficult to achieve the upgrading and transformation of the sewage treatment station without suspending the use of the sewage treatment station to meet the increased sewage treatment volume and the improved environmental protection emission standards. In the prior art, the upgrading and transformation of the sewage treatment station often requires suspension of service, which will lead to environmental pollution and operation interruption, resulting in economic losses and social impact. In this embodiment, first, the sewage discharge information is collected to establish a transformation database, which includes actual displacement, processing capacity, process, operation status, water quality, etc. Then, the construction drawings are designed based on this information, and the building structure construction is completed. Next, the equipment is installed and the single machine is debugged, the pipe network connection between the modified structure and the used structure is completed, the sewage is discharged into the modified structure, and a partition structure is set in the sewage pool 1. Finally, the power supply system is transformed and the equipment debugging is completed. This process ensures that the sewage treatment station can continue to operate during the transformation process, avoiding service interruption. Through the above method, the sewage treatment station can be upgraded and transformed without interrupting service, ensuring the continuity and stability of sewage treatment. At the same time, the transformed sewage treatment station can treat more sewage, and the discharged water quality meets more stringent environmental protection standards. This approach also reduces environmental risks and economic losses during the transformation process and improves the operating efficiency and reliability of the sewage treatment plant.

[0034] It should also be noted that in step 1, the optimization design of the upgrade and renovation plan is carried out according to the operation status of the sewage treatment station currently in operation in the hospital. The main reference contents include: the actual discharge volume of existing hospital sewage, sewage treatment capacity, sewage treatment process, current operation status of sewage treatment station, water quality, the volume and location of existing water tanks, the elevation of each pipeline and well, on-site site conditions, etc. The above information is collected and counted to optimize the design of the sewage treatment station renovation plan. The optimization design contents are as follows: Step 11: Based on the actual sewage discharge and existing sewage treatment capacity, combined with the hospital's planning and construction situation, reasonably estimate the expansion of the hospital's sewage treatment scale and determine the capacity of the sewage treatment plant after expansion.

[0035] Step 12: Select appropriate sewage treatment technology based on the existing sewage treatment plant technology, operation and maintenance conditions, water quality conditions, etc. The selection of sewage treatment technology should fully consider the reuse of existing facilities to reduce additional construction work.

[0036] Step 13: Based on the determined sewage treatment process and capacity, determine the volume of each pool, the number of equipment in each process link and the installation requirements.

[0037] Step 14: Based on the volume and location of the original water tanks on site, the elevations of each pipe and well, site conditions, etc., determine the connection location of each pipe, pipe elevation, equipment installation location, etc., and complete the construction drawing design.

[0038] Step 2: Construction of new facilities and structures. Complete the construction of new structures according to the construction drawings, including but not limited to the construction of new pools, new flow channels, station buildings and other structures and structures outside the original sewage treatment station. At the same time, complete the excavation of various pipe trenches and laying of pipe networks outside the original sewage treatment station, and only reserve interface positions for later connection.

[0039] Step 3: Equipment installation in the new structure. Installation and stand-alone commissioning of various facilities and equipment such as pipes, water pumps, sewage treatment equipment, and control equipment installed in the new structure.

[0040] Step 4: Connect the pipe network between the new structure and the original sewage treatment station. The connection between the new structure and the original sewage treatment station requires opening a hole in the side wall of the original pool or adding a branch pipe to the original pipeline to ensure smooth water flow and reduce the investment in the lifting pump. The connection steps are as follows: Step 41: Preparation for connection. Determine the connection location and elevation in advance according to the drawings, complete excavation, line laying and positioning work outside the pool where the pipe network needs to be connected to the side wall of the pool, and prepare all construction materials and personnel.

[0041] Step 42: Lower the water level at the connection location. To avoid sewage overflow during connection, the water level in the corresponding pipe or pool needs to be lowered to below the elevation of the connection location. Select a time period when the sewage treatment plant has a small load (such as late at night) to measure the water level. If the low water level time is sufficient for the connection construction, then select the corresponding time period to complete the connection construction at this location. If the water level is not low enough or the low water level time is too short to meet the connection construction needs, additional measures need to be taken to lower the water level. The water inlet valve at this location can be closed and the sewage can be temporarily stored in the accident pool to lower the water level at this location. Pipeline connection construction. After the water level at the connection location is lowered, the pool wall opening 94 or the pipe cutting at the connection location is cut and cut to complete the installation and connection of the new pipe, and then the opening 94 or the cutting location is sealed and waterproofed.

[0042] Step 5: Reconstruction of the original sewage treatment station pool. After the pipe network connection is completed, the original sewage station is reconstructed. During the equipment installation and commissioning process of the reconstruction process, the sewage can be temporarily stored in the newly built pool and the original pool can be emptied to avoid the adverse impact of sewage treatment on the reconstruction construction.

[0043] Step 6: Installation of finished partitions in disinfection pool 5. Upgrading and reconstruction requires expanding the volume of disinfection pool 5, and adding partitions in disinfection pool 5 to ensure that the drugs and sewage in disinfection pool 5 are fully mixed. In the case of no new disinfection pool 5, the pool adjacent to disinfection pool 5 can be merged with disinfection pool 5, a groove is cut on the top of the original pool, and the finished partition is lowered into the pool through the gap. The finished partition is prefabricated and the water holes are reserved during production.

[0044] Step 7: Power supply system transformation. After the installation of facilities and equipment is completed, the power supply system will be transformed according to the operation of the new sewage treatment plant. At the same time, the equipment will be combined according to its purpose and installation location, and the control logic will be adjusted to ensure that the equipment with the same function or equipment that serves as backup for each other uses the same control system. Monitoring equipment relocation. According to the functions of each pool after the transformation, the corresponding monitoring equipment's monitoring probes, sampling devices, etc. will be moved to the new location, and the monitoring equipment will be debugged.

[0045] Step 8: Comprehensive commissioning and acceptance and commissioning. After all the renovation work is completed, the overall comprehensive commissioning of the sewage treatment plant is carried out to ensure that all links are operating normally, the design functions are achieved, and the treatment effect meets the standards. Then, relevant acceptance can be carried out and the plant can be officially put into use.

[0046] In the above steps, when designing the sewage treatment station renovation plan, the actual situation of the hospital site should be taken into consideration. The actual sewage discharge and treatment conditions in the hospital operation can be fully considered. The plan can be reasonably designed, and the most suitable upgrading and renovation plan can be selected according to local conditions to achieve the lowest comprehensive cost of renovation, operation and maintenance. During the renovation, all renovation work is completed outside the pool by lowering the water level at the connection position and installing the finished partition outside the pool. There is no need for personnel to enter the inside of the pool of the original sewage station, which reduces the work of sewage pumping and dredging, reduces the investment in measures for confined space operations, greatly reduces construction costs, and ensures construction safety.

[0047] In the above technical scheme, when connecting the new structure to the original sewage station, the water level at the connection location is lowered by selecting the low-drain time period of hospital sewage discharge such as late night, or temporarily storing sewage in the accident pool. When the water level drops below the construction connection elevation, the hole opening and cutting, pipe connection, and plugging operations are carried out from the outside of the original sewage treatment station. The finished partitions are produced and processed in advance, and the on-site installation is also installed from the outside of the pool. After adopting the above technical means, the sewage station renovation construction is all completed outside the original pool, reducing the operation of the confined space. Personnel do not need to enter the original sewage station pool, so there is no need to pump, drain, and desilt the original sewage treatment station. The construction environment outside the pool is good, the construction speed is fast, and the construction process is safer and more economical. At the same time, the discharge of temporary sewage, sludge and other pollutants is greatly reduced, which is more in line with environmental protection standards.

[0048] The above specific implementation methods further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific implementation methods of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A sewage treatment station, comprising a sewage pool (1), a screen pool (2), a regulating pool (3), a sedimentation pool (4) and a disinfection pool (5) which are sequentially connected by pipelines, characterized in that: The invention also comprises an anoxic tank (6) arranged between the regulating tank (3) and the sedimentation tank (4) via a pipeline, the anoxic tank (6) being further connected to a contact oxidation tank (7) via a pipeline, the contact oxidation tank (7) comprising a contact frame (71), an aeration frame (72) being arranged below the contact frame (71), the aeration frame (72) being connected to a fan (73), an aeration group (74) being arranged on the aeration frame (72), each aeration group (74) comprising aeration sheets (75) arranged in pairs, each aeration sheet (75) being connected to the aeration frame (72).

2. A sewage treatment plant according to claim 1, characterized in that: The aeration sheet (75) comprises an aeration plate body (751) and four contact areas (752) arranged on the end surface of the aeration plate body (751), and the contact areas (752) of each pair of aeration sheets (75) are arranged opposite to each other, and the contact areas (752) comprise a plurality of contact sheets (753), and the plurality of contact sheets (753) are all connected to the interior of the aeration plate body (751), and the contact sheets (753) are also provided with a plurality of through holes.

3. A sewage treatment plant according to claim 1, characterized in that: The regulating tank (3) is connected to the emergency accident tank (8) via a pipeline.

4. A sewage treatment plant according to claim 1, characterized in that: A central tube (10) is provided in the sedimentation tank (4).

5. A sewage treatment plant according to claim 2, characterized in that: The contact piece (753) is bent and arranged on the end surface of the aeration plate body (751), and the flange parts of the contact piece (753) all point to the geometric center of the aeration plate body (751).

6. A sewage treatment station according to claim 3 or 4, characterized in that: A plurality of aeration heads (9) are also provided below the aeration frame (72). The aeration heads (9) are connected to the output end of another fan (73). The aeration heads (9) are used to increase the content and retention time of oxygen in the aeration group (74).

7. A sewage treatment station according to claim 6, characterized in that: The aeration head (9) comprises a tube seat (91) detachably connected to the output end of the fan (73); a rotating head (92) is movably connected to the end of the tube seat (91); a plurality of hollow aeration balls (93) are evenly spaced on the rotating head (92); the interior of the aeration balls (93) is connected to the tube seat (91) through a channel; and a plurality of openings (94) are obliquely provided at the end of the rotating head (92); when oxygen passes through the tube seat (91), the rotating head (92) is driven to rotate on the tube seat (91) through the openings (94), and oxygen is ejected through the aeration balls (93).

8. A reconstruction construction method for a sewage treatment station, characterized in that: A sewage treatment station according to any one of claims 1 to 7, The steps include: Step 1: Preparation for transformation: collect sewage discharge information and establish a transformation database. The sewage discharge information includes: actual discharge volume, sewage treatment capacity, sewage treatment process, operation status, water quality, volume and location of each pool, and elevation of each pipeline; Step 2, building construction, after step 1 is completed, design construction drawings according to sewage discharge information, and complete building structure construction according to the construction drawings; Step 3, equipment installation. After step 2 is completed, complete the equipment installation and stand-alone debugging according to the construction drawing; Step 4: Pipeline connection: After step 3 is completed, the pipe network connection between the modified structure and the existing structure is completed according to the construction drawing; Step 5, pool reconstruction, after step 4 is completed, the sewage is discharged into the reconstructed structure; Step 6, partition installation, after step 5 is completed, a groove is cut on the top of the sewage pool (1) of the same structure, and a partition structure is installed in the sewage pool (1); Step 7: Power supply transformation: After step 6 is completed, the power supply system of the sewage treatment plant is transformed; Step 8: Debugging and running. After step 7 is completed, the sewage treatment plant equipment debugging is completed.

9. A sewage treatment station reconstruction construction method according to claim 8, characterized in that: Step 1 also includes: Step 11, determining the capacity scale of the sewage treatment plant after transformation according to the actual discharge volume; Step 12, determining the treatment process after transformation according to the sewage treatment capacity and the sewage treatment process; Step 13, determine the quantity and installation requirements of the modified equipment according to the operation status and water quality; Step 14, complete the construction drawing design based on the volume and location of each pool and the elevation of each pipeline.

10. A sewage treatment station reconstruction construction method according to claim 8, characterized in that: Step 4 also includes: Step 41, determine the connection location and elevation in advance according to the construction drawing, and prepare the construction materials and personnel; Step 42, after lowering the water level at the connection position, a hole (94) is opened in the pool wall at the connection position or the pipeline is cut and truncated to complete the installation and connection of the newly built pipeline.

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