Inlet water energy dissipation device for enamel spliced tank secondary sedimentation tank

Abstract

The utility model belongs to the field of secondary sedimentation tank water inlet energy dissipation devices, and particularly relates to an enamel spliced tank secondary sedimentation tank water inlet energy dissipation device which comprises an energy dissipation barrel, a liquid inlet and a liquid outlet are formed in the side wall of the energy dissipation barrel, the liquid outlet is formed in the position higher than the liquid inlet, and the liquid inlet is used for being communicated with a liquid outlet of a high-position aerobic tank. The liquid outlet is communicated with a secondary sedimentation tank water inlet pipe; a first dosing pipe, a second dosing pipe and a stirrer are arranged on a top plate of the energy dissipation barrel, the first dosing pipe and the second dosing pipe extend into the energy dissipation barrel from the top, the bottom ends of the first dosing pipe and the second dosing pipe are close to the liquid inlet, and the first dosing pipe and the second dosing pipe are used for introducing a phosphorus removal agent and a flocculating agent respectively; the energy dissipation barrel is provided with a vent nozzle, and a top plate of the energy dissipation barrel is further provided with an access hole and an exhaust pipe. Energy generated when liquid enters the secondary sedimentation tank from the high-position aerobic tank is effectively eliminated, the liquid flow velocity is reduced, and the sedimentation effect of the secondary sedimentation tank is ensured.

Description

[Technical Field]

[0001] This utility model belongs to the field of energy dissipation devices for secondary sedimentation tank inlet, specifically relating to an energy dissipation device for secondary sedimentation tanks with enamel-lined spliced ​​tanks. [Background Technology]

[0002] In recent years, land for industrial park wastewater treatment plants has become increasingly scarce, and compared to municipal sewage treatment plants, they have higher expansion costs. As the number of enterprises entering the industrial park gradually increases, the output of industrial waste liquid and wastewater is also increasing, and the existing industrial park wastewater treatment facilities cannot meet the current wastewater treatment capacity.

[0003] Enameled modular tanks have excellent surface corrosion resistance and a high vertical height, reaching up to 24m. This allows them to occupy a small area of ​​land while ensuring effective wastewater treatment. Furthermore, enamel-lined modular tanks have a short overall construction period and low construction cost, making them widely used in the expansion and renovation of wastewater treatment plants in industrial parks.

[0004] Currently, many industrial parks use high-height enamel-lined tanks for their biological treatment ponds in order to save land. Taking a wastewater treatment plant in a circuit board industrial park as an example, to save land, the enamel-lined tank used in the aerobic pond has a diameter of 8.4m, a height of 9.6m, and an effective water depth of 8.0m. The aerobic pond is connected to a radial flow secondary sedimentation tank at the rear end. The water depth around the secondary sedimentation tank is generally 1.5 to 3.0m. In this project, the total height of the secondary sedimentation tank is 4.8m, and the water depth is 4.4m, with a height difference of about 3.6m between the secondary and aerobic ponds. If the effluent from the aerobic pond directly enters the central stabilizing cylinder of the secondary sedimentation tank through the pipeline, the gravitational potential energy will be converted into kinetic energy, which will inevitably lead to an excessively high inflow velocity into the central stabilizing cylinder, resulting in poor sedimentation effect in the secondary sedimentation tank. [Utility Model Content]

[0005] This utility model provides an inlet energy dissipation device for the secondary sedimentation tank of an enamel-lined spliced ​​tank to solve the technical problems of high inlet flow velocity and poor sedimentation performance of the secondary sedimentation tank in the prior art.

[0006] The technical solution of the energy dissipation device for the secondary sedimentation tank of an enamel-lined spliced ​​tank provided by this utility model is as follows:

[0007] An energy dissipation device for a secondary sedimentation tank in an enamel-lined modular tank includes an energy dissipation tank. The side wall of the energy dissipation tank has an inlet and an outlet, with the outlet positioned higher than the inlet. The inlet connects to the outlet pipe of a high-level aerobic tank, and the outlet connects to the inlet pipe of the secondary sedimentation tank. The top plate of the energy dissipation tank has a first dosing pipe, a second dosing pipe, and a mixer. The first and second dosing pipes extend into the energy dissipation tank from the top, with their bottom ends near the inlet. The first and second dosing pipes are used to introduce a phosphorus removal agent and a flocculant, respectively. The energy dissipation tank also has a vent, and the top plate of the energy dissipation tank has an inspection port and an exhaust pipe.

[0008] Furthermore, the mixer is located in the center of the top plate of the energy dissipation tank, the liquid inlet and liquid outlet are located on the left and right sides of the mixer respectively, and the first dosing pipe and the second dosing pipe are located on the left side of the mixer.

[0009] Furthermore, the vent is located on the side wall of the energy dissipation tank near the bottom.

[0010] Furthermore, the energy dissipation tank is installed on the energy dissipation tank support platform, which is supported by platform legs.

[0011] Furthermore, the bottom of the outlet tube is at least 100mm higher than the top of the inlet tube.

[0012] Furthermore, the top of the energy dissipation tank is 300mm higher than the top of the secondary sedimentation tank.

[0013] Furthermore, the energy dissipation bucket is made of carbon steel or corrosion-resistant steel, or a finished PE bucket.

[0014] The beneficial effects are:

[0015] The energy dissipation tank is connected to the atmosphere through an exhaust pipe, ensuring smooth liquid intake. When the liquid enters the tank from the inlet, the flow is turbulent, generating vortices that collide and rub against the bottom and walls of the tank, thus dissipating energy. Secondly, the inlet is positioned lower than the outlet, ensuring that the tank overflows, resulting in a slow and stable outflow. This effectively eliminates the energy released when the high-level aerobic tank feeds into the secondary sedimentation tank, reduces the flow velocity, and ensures the sedimentation effect of the secondary sedimentation tank.

[0016] By setting up a first dosing pipe and a second dosing pipe, and placing the bottom outlets of the first dosing pipe and the second dosing pipe close to the liquid inlet, when adding chemicals to the energy dissipation tank, the turbulent flow at the liquid inlet allows the chemicals to mix more quickly and evenly with the liquid flow.

[0017] By installing a mixer, sludge can be prevented from settling at the bottom of the energy dissipation tank during operation, thus avoiding affecting the normal operation of the energy dissipation tank and preventing the settled sludge from fermenting inside the energy dissipation tank and producing odors. In addition, the mixer can also ensure that the added agents are evenly mixed with the liquid flow.

[0018] The enamel-lined spliced ​​tank secondary sedimentation tank inlet energy dissipation device has a simple overall structure and is easy to maintain. In addition, the presence of inspection ports and vent ports makes it easy for maintenance personnel to observe the operating status of the entire device and facilitate device inspection and maintenance.

[0019] Energy dissipation tanks are made of carbon steel or corrosion-resistant steel or finished PE tanks, resulting in lower overall production costs. [Attached Image Description]

[0020] Figure 1 This is a top view of an inlet energy dissipation device for a secondary sedimentation tank of an enamel-lined spliced ​​tank in Embodiment 1.

[0021] Figure 2 This is a front view of an inlet energy dissipation device for a secondary sedimentation tank of an enamel-lined spliced ​​tank in this embodiment 1;

[0022] 1. Energy dissipation tank; 2. Energy dissipation tank support platform; 3. Platform support legs; 4. Liquid inlet; 5. Liquid outlet; 6. Exhaust pipe; 7. Inspection port; 8. First dosing pipe; 9. Second dosing pipe; 10. Vent port; 11. Mixer.

Detailed Implementation Methods

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description of this utility model is provided in conjunction with the accompanying drawings.

[0024] Specific Embodiment 1 of the energy dissipation device for the secondary sedimentation tank of an enamel-lined spliced ​​tank provided by this utility model:

[0025] The energy dissipation device for the secondary sedimentation tank of the enamel-lined spliced ​​tank provided in this embodiment includes an energy dissipation tank 1, which is installed on an energy dissipation tank support platform 2, which is supported by platform legs.

[0026] The energy dissipation tank 1 has a vent 10, an inlet 4, and an outlet 5 on its side wall. The top plate has a first dosing pipe 8, a second dosing pipe 9, an exhaust pipe 6, an inspection port 7, and a mixer 11. Specifically, the inlet 4 and outlet 5 are located on the left and right sides of the energy dissipation tank 1. The outlet 5 is positioned higher than the inlet 4, with the bottom of the outlet 5 pipe at least 100mm higher than the top of the inlet 4 pipe. The inlet 4 connects to the inlet pipe, which in turn connects to the outlet of the high-level aerobic tank. The outlet 5 connects to the outlet pipe, which in turn connects to the inlet pipe of the secondary sedimentation tank. The maximum height of the outlet 5 is determined by calculation based on the height of the high-level aerobic tank outlet and the total head loss of the system. The flow velocity of the outlet 5 is determined by the difference between the liquid level in the energy dissipation tank 1 and the liquid level in the secondary sedimentation tank, as well as the size of the outlet 5. The flow velocity of the outlet 5 should not exceed 0.8m / s.

[0027] The mixer 11 is located in the center of the top plate of the energy dissipation tank 1. The inlet 4 and outlet 5 are located on the left and right sides of the mixer 11, respectively. The vent 10 is located on the back side of the energy dissipation tank 1, near the bottom. The inspection port 7 is located on the right side of the mixer 11. The first dosing pipe 8 and the second dosing pipe 9 are located on the left side of the mixer 11, and the first dosing pipe 8, the second dosing pipe 9, and the mixer 11 are all arranged on the same diameter of the energy dissipation tank 1. The first dosing pipe 8 and the second dosing pipe 9 extend into the energy dissipation tank 1 from the top and are positioned near the inlet 4 at their bottom ends. The exhaust pipe 6 is located on the left side of the mixer 11, near the front of the energy dissipation tank 1. The inspection port 7 and the vent 10 facilitate the inspection and observation of the entire energy dissipation device. Maintenance personnel can observe the operation of the energy dissipation device through the inspection port 7. In addition, when a system malfunction occurs, the energy dissipation tank 1 can be vented through the vent 10 before maintenance work can be carried out.

[0028] In this embodiment, the energy dissipation tank support platform 2 is a square platform, with the energy dissipation tank installed in the center of the platform. Platform legs 3 are provided at each of the four corners of the energy dissipation tank support platform 2 to ensure stable support. By setting up the energy dissipation tank support platform 2, the installation height of the energy dissipation tank 1 can be controlled. The top elevation of the energy dissipation tank 1 is determined based on the height of the top of the secondary sedimentation tank. Then, the elevation of the outlet 5 is determined based on the elevation of the inlet pipe of the secondary sedimentation tank, thereby determining the elevation of the inlet 4. The bottom of the inlet 4 pipe is approximately 200mm downwards, which is the bottom elevation of the energy dissipation tank 1. The difference between the top and bottom elevations of the energy dissipation tank 1 is the height of the energy dissipation tank 1. The distance from the bottom elevation of the energy dissipation tank 1 to the ground is the height of the energy dissipation tank support platform 2. Preferably, the top of the energy dissipation tank 1 is 300mm higher than the top of the secondary sedimentation tank to prevent overflow. In this embodiment, the main body of the energy dissipation tank 1 is made of carbon steel anti-corrosion steel plate. In other embodiments, a finished PE tank can also be used as the main body of the energy dissipation tank 1, which is less expensive.

[0029] In this embodiment, the working process of an inlet energy dissipation device for a secondary sedimentation tank of an enamel-lined modular tank is as follows:

[0030] The effluent from the high-level aerobic tank enters the inlet 4. The agitator 11 is turned on. After the effluent from the high-level aerobic tank enters the energy dissipation tank 1, the flow rate slows down and the liquid level gradually rises. The gas in the energy dissipation tank 1 is discharged through the exhaust pipe 6 to maintain the gas pressure balance in the energy dissipation tank 1. The phosphorus removal agent is introduced through the first dosing pipe 8 and the flocculant is introduced through the second dosing pipe 9. Since both the first dosing pipe 8 and the second dosing pipe 9 extend into the energy dissipation tank 1 from the top and the bottom is close to the inlet 4, the hydraulic stirring effect at the inlet 4 and the stirring effect of the agitator 11 are used to make the effluent from the high-level aerobic tank, the phosphorus removal agent and the flocculant mix evenly. Then, the mixture overflows from the outlet 5 into the flow stabilization cylinder of the secondary sedimentation tank. In this embodiment, outlet 5 is connected to an outlet pipe with a flow velocity of less than or equal to 0.8 m / s. This prevents excessively fast flow at outlet 5 and ensures the sedimentation effect in the secondary settling tank. The phosphorus removal agent and flocculant can be selected and added according to the actual sedimentation rate and effect, and the dosage can be determined. In this embodiment, PAM flocculant is used, which can effectively improve sludge settling performance.

[0031] Specific Embodiment 2 of the energy dissipation device for the secondary sedimentation tank of an enamel-lined spliced ​​tank provided by this utility model:

[0032] The energy dissipation device for the secondary sedimentation tank of the enamel-lined spliced ​​tank provided in this embodiment differs from that in Embodiment 1 only in that the vent is located on the bottom plate of the energy dissipation tank.

[0033] Specific Embodiment 3 of the Energy Dissipation Device for the Second Settling Tank of an Enameled Spliced ​​Tank Provided by This Utility Model:

[0034] The energy dissipation device for the secondary sedimentation tank of the enamel-lined spliced ​​tank provided in this embodiment differs from that in Embodiment 1 only in that it does not have an energy dissipation tank support platform, thereby further reducing the cost of the entire device.

[0035] Specific Embodiment 4 of the energy dissipation device for the secondary sedimentation tank of an enamel-lined spliced ​​tank provided by this utility model:

[0036] The energy dissipation device for the secondary sedimentation tank of the enamel-lined spliced ​​tank provided in this embodiment differs from that in Embodiment 1 only in that the bottom of the outlet pipe is 150mm higher than the top of the inlet pipe. In other embodiments, the bottom of the outlet pipe may be 200mm, 300mm, 320mm, 355mm, or other values ​​greater than 100mm higher than the top of the inlet pipe.

[0037] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A water inlet energy dissipater for a secondary sedimentation tank of a enameled spliced tank, characterized in that, The energy dissipation barrel (1) is provided with a liquid inlet (4) and a liquid outlet (5) on the side wall, the liquid outlet (5) is arranged at a position higher than the liquid inlet (4), the liquid inlet (4) is used for connecting the water outlet pipe of the high-level aerobic tank, and the liquid outlet (5) is used for connecting the water inlet pipe of the secondary sedimentation tank; the top plate of the energy dissipation barrel (1) is provided with a first dosing pipe (8), a second dosing pipe (9) and a mixer (11), the first dosing pipe (8) and the second dosing pipe (9) extend into the energy dissipation barrel (1) from the top and are close to the liquid inlet (4) at the bottom, and the first dosing pipe (8) and the second dosing pipe (9) are respectively used for feeding phosphorus removal agent and flocculant; the energy dissipation barrel (1) is further provided with a vent (10), and the top plate of the energy dissipation barrel (1) is provided with an access hole (7) and an exhaust pipe (6).

2. The water inlet energy dissipator for a secondary sedimentation tank of a cast-in-place jointed tank according to claim 1, characterized in that, The mixer (11) is arranged at the center of the top plate of the energy dissipation barrel (1), the liquid inlet (4) and the liquid outlet (5) are arranged on the left and right sides of the mixer (11) respectively, and the first dosing pipe (8) and the second dosing pipe (9) are arranged on the left side of the mixer (11).

3. The water inlet energy dissipator for a secondary sedimentation tank of a cast-in-place jointed tank according to claim 1, characterized in that, The vent (10) is arranged at a position close to the bottom of the side wall of the energy dissipation barrel (1).

4. The water inlet energy dissipator for a secondary sedimentation tank of a cast-in-place jointed tank according to claim 1, characterized in that, The energy dissipation barrel (1) is installed on an energy dissipation barrel support platform (2), and the energy dissipation barrel support platform (2) is supported by a platform support leg (3).

5. The water inlet energy dissipator for a secondary sedimentation tank of a cast-in-place jointed tank according to claim 1, characterized in that, The inner bottom of the liquid outlet (5) is at least 100mm higher than the inner top of the liquid inlet (4).

6. The water inlet energy dissipator for a secondary sedimentation tank of a cast-in-place jointed tank according to claim 1, characterized in that, The topmost part of the energy dissipation barrel (1) is 300mm higher than the top of the secondary sedimentation tank.

7. The water inlet energy dissipator for a secondary sedimentation tank of a cast-in-place jointed tank according to claim 1, characterized in that, The energy dissipation barrel (1) is made of carbon steel anticorrosion steel material or a finished PE barrel.

Images