Water inlet system of pretreatment tank
By using an intensive design and uniform water distribution method for the pretreatment tank inlet system, the problems of large footprint and high cost of existing pretreatment tanks have been solved. This has enabled thorough mixing of reagents and smooth hydraulic flow, thereby reducing water treatment costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-07-19
- Publication Date
- 2026-04-03
AI Technical Summary
The existing pretreatment tanks are poorly laid out, resulting in large land area, high civil engineering costs, uneven water distribution, high power costs, and insufficient mixing of chemicals, which increases water treatment costs.
A pretreatment tank inlet system was designed, which includes an integrated combination of components such as an inlet water distribution well, a bar screen, a primary sedimentation chemical addition tank, and a primary sedimentation tank. The system utilizes a combination of an inlet water distribution well, an inlet pipe, a water passage hole, a primary sedimentation tank water distribution trough, and a perforated flower wall to distribute water evenly. An air stirring pipe is installed in the primary sedimentation chemical addition tank to ensure the mixing effect of the chemicals.
It saves land area, reduces construction costs, achieves uniform water distribution, smooth hydraulic flow, and thorough mixing of chemicals, thereby reducing chemical consumption and power costs and lowering water treatment costs.
Smart Images
Figure CN224077130U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of sewage treatment inlet systems, and in particular to a pretreatment tank inlet system. Background Technology
[0002] Pretreatment tanks are the primary treatment unit in wastewater treatment plants. They function to intercept and remove large suspended solids, coagulate and settle, regulate and separate, and protect facilities in subsequent treatment units. Wastewater treated in pretreatment tanks has a stable effluent flow rate, significantly reducing the impact load on the secondary treatment unit's biological treatment tank, and to some extent improving the biodegradability of wastewater entering the biological treatment tank. Therefore, the importance of pretreatment tanks in wastewater treatment plants is self-evident. Currently, due to unreasonable layout, pretreatment tanks occupy a large area, incur high civil engineering costs, and are difficult to construct. Furthermore, uneven water distribution and high power costs, insufficient mixing of chemicals in the primary sedimentation dosing tank, and increased chemical consumption all contribute to high water treatment costs. Utility Model Content
[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a pretreatment tank inlet system.
[0004] The purpose of this utility model is achieved through the following technical solution: a pretreatment tank inlet system, characterized in that the system includes an inlet distribution well, a bar screen channel, a water passage, a primary sedimentation dosing tank, an electric pre-drilled gate valve, a primary sedimentation tank inlet distribution tank, a primary sedimentation tank water distribution trough, a perforated flower wall, a primary sedimentation tank, an inlet pipe, a waterproof sleeve, an air mixing pipe, and a manual ball valve, all components connected to form a square system; an inlet distribution well for evenly distributing water in the tank to the bar screen channel is set at the lower right of the system, the inlet pipe passes through the bottom of the inlet distribution well and is tightly fixedly connected to the waterproof sleeve in the inlet distribution well; a bar screen channel for intercepting larger suspended solids and floating objects in sewage and wastewater is set to the left of the inlet distribution well; a primary sedimentation dosing tank for adding coagulants is set directly above the water distribution well and the bar screen channel, an air mixing pipe is arranged near the bottom of the primary sedimentation dosing tank, and a manual ball valve is set on the air mixing pipe for controlling the amount of air in each primary sedimentation dosing tank; Water passages are provided at different locations in the primary sedimentation chemical addition tank; electric pre-drilled gate valves for controlling the inflow of water into each primary sedimentation tank are installed on the uppermost tank wall of the primary sedimentation chemical addition tank near the two water passages; two primary sedimentation tank inlet and distribution tanks are arranged directly above the primary sedimentation chemical addition tank; primary sedimentation tanks are arranged directly above the two primary sedimentation tank inlet and distribution tanks, and the common wall along the length of the two primary sedimentation tank inlet and distribution tanks and the two primary sedimentation tanks is set as a perforated flower wall.
[0005] Preferably, the primary sedimentation dosing tank is provided with multiple compartments, including a first primary sedimentation dosing tank, a second primary sedimentation dosing tank, a third primary sedimentation dosing tank, a fourth primary sedimentation dosing tank, a fifth primary sedimentation dosing tank, a sixth primary sedimentation dosing tank, a seventh primary sedimentation dosing tank, an eighth primary sedimentation dosing tank, a ninth primary sedimentation dosing tank, and a tenth primary sedimentation dosing tank. The first primary sedimentation dosing tank is located on the left side of the middle of the system. The second and third primary sedimentation dosing tanks are symmetrically arranged on one side of the first primary sedimentation dosing tank. The fourth, fifth, sixth, and seventh primary sedimentation dosing tanks are arranged sequentially on one side of the third primary sedimentation dosing tank. The tenth, ninth, and eighth primary sedimentation dosing tanks are arranged sequentially on one side of the second primary sedimentation dosing tank. The length of the first initial sedimentation treatment tank is equal to the sum of the widths of the two rows of initial sedimentation treatment tanks. The widths of the initial sedimentation treatment tanks in the two rows are the same. The second and third initial sedimentation treatment tanks are the same size. The fourth and fifth initial sedimentation treatment tanks are the same size, and the sum of the lengths of the fourth and fifth initial sedimentation treatment tanks is equal to the length of the tenth initial sedimentation treatment tank. The sixth, seventh, eighth, and ninth initial sedimentation treatment tanks are the same size.
[0006] Preferably, water passages are provided at different locations in the primary sedimentation dosing tank, including a first water passage at the bottom of the first primary sedimentation dosing tank, the width of which is the same as the width of the first primary sedimentation dosing tank; a second water passage at the common wall between the first and second primary sedimentation dosing tanks, the width of which is the same as the width of the second primary sedimentation dosing tank; a third water passage on the common wall between the second and third primary sedimentation dosing tanks, adjacent to the left end; a fourth water passage at the common wall between the third and fourth primary sedimentation dosing tanks; a fifth water passage at the common wall between the fourth and fifth primary sedimentation dosing tanks; and a sixth water passage at the common wall between the fifth and sixth primary sedimentation dosing tanks. The seventh water passage is opened at the common wall between the sixth and seventh primary sedimentation dosing tanks. The fourth, fifth, sixth, and seventh water passages are all the same size, and their width is equal to the width of the primary sedimentation dosing tanks in the lower row. The eighth water passage is opened at the right end of the common wall between the seventh and eighth primary sedimentation dosing tanks. The ninth water passage is opened at the common wall between the eighth and ninth primary sedimentation dosing tanks. The tenth water passage is opened at the common wall between the ninth and tenth primary sedimentation dosing tanks. The ninth and tenth water passages are the same size, and their width is equal to the width of the primary sedimentation dosing tanks in the upper row. The eleventh water passage is opened at the left and right ends of the common wall between the tenth primary sedimentation dosing tank and the primary sedimentation tank inlet distribution tank.
[0007] Preferably, the bottom elevation of the first water passage hole is level with the bottom elevation of the grid channel; the bottom elevations of the second, fourth, sixth, eighth, and tenth water passage holes are level with the bottom elevation of the primary sedimentation and chemical addition tank and lower than the bottom elevation of the first water passage hole; the top elevations of the third, fifth, seventh, ninth, and eleventh water passage holes are level with the water surface level in the primary sedimentation and chemical addition tank, and their bottom elevations are higher than the bottom elevation of the primary sedimentation and chemical addition tank and higher than the bottom elevation of the first water passage hole.
[0008] Preferably, rectangular holes are provided in the perforated flower wall, and three rows of rectangular holes are arranged on each perforated flower wall and located in the middle of the perforated flower wall. All holes are located below the water surface level of the primary sedimentation tank and the primary sedimentation tank inlet distribution tank.
[0009] Preferably, a primary sedimentation tank water distribution trough is provided on the side of the inlet water distribution tank of the two primary sedimentation tanks near the wall of the primary sedimentation chemical addition tank. The bottom elevation of the primary sedimentation tank water distribution trough is level with the bottom elevation of the eleventh water passage and higher than the top elevation of the rectangular hole. The part of the primary sedimentation tank inlet water distribution tank that is lower than the bottom elevation of the bottom of the lowest row of rectangular holes is a solid structure.
[0010] Preferably, the elevation of the bar screen channel is greater than the elevation of the primary sedimentation chemical addition tank, the elevation of the primary sedimentation tank inlet water distribution tank, and the elevation of the primary sedimentation tank.
[0011] Preferably, the wastewater flow direction is as follows: inlet pipe → inlet distribution well → bar screen → first primary sedimentation chemical dosing tank → second primary sedimentation chemical dosing tank → third primary sedimentation chemical dosing tank → fourth primary sedimentation chemical dosing tank → fifth primary sedimentation chemical dosing tank → sixth primary sedimentation chemical dosing tank → seventh primary sedimentation chemical dosing tank → eighth primary sedimentation chemical dosing tank → ninth primary sedimentation chemical dosing tank → tenth primary sedimentation chemical dosing tank → primary sedimentation tank distribution trough → primary sedimentation tank inlet distribution tank → primary sedimentation tank.
[0012] Preferably, the wastewater first flows into the inlet distribution well through the inlet pipe. Then, the wastewater in the distribution well overflows the weir and evenly enters the two-compartment screen channel. The wastewater in the screen channel flows into the first primary sedimentation and chemical dosing tank through the first through-hole. The wastewater in the first primary sedimentation and chemical dosing tank flows into the second primary sedimentation and chemical dosing tank through the second through-hole. The wastewater in the second primary sedimentation and chemical dosing tank flows into the third primary sedimentation and chemical dosing tank through the third through-hole. The wastewater in the third primary sedimentation and chemical dosing tank flows into the fourth primary sedimentation and chemical dosing tank through the fourth through-hole. The wastewater in the fourth primary sedimentation and chemical dosing tank flows into the fifth primary sedimentation and chemical dosing tank through the fifth through-hole. The wastewater in the fifth primary sedimentation and chemical dosing tank flows into the sixth primary sedimentation and chemical dosing tank through the sixth through-hole. Wastewater in the primary sedimentation and chemical dosing tank flows into the seventh primary sedimentation and chemical dosing tank through the seventh water passage. Wastewater in the seventh primary sedimentation and chemical dosing tank flows into the eighth primary sedimentation and chemical dosing tank through the eighth water passage. Wastewater in the eighth primary sedimentation and chemical dosing tank flows into the ninth primary sedimentation and chemical dosing tank through the ninth water passage. Wastewater in the ninth primary sedimentation and chemical dosing tank flows into the tenth primary sedimentation and chemical dosing tank through the tenth water passage. By controlling the electric pre-reserved hole gate, wastewater in the tenth primary sedimentation and chemical dosing tank flows evenly into the water distribution channel of the two primary sedimentation tanks through the eleventh water passage. Wastewater in the water distribution channel enters the primary sedimentation tank inlet distribution tank through the overflow weir. Finally, wastewater in the primary sedimentation tank inlet distribution tank flows into the primary sedimentation tank through the rectangular holes in the perforated flower wall.
[0013] This invention has the following advantages: The device integrates the water treatment structures—grid channel, primary sedimentation dosing tank, and primary sedimentation tank—in a compact and efficient manner, saving floor space and reducing construction costs. Furthermore, it cleverly utilizes a combination of inlet distribution wells, inlet pipes, through holes, primary sedimentation tank inlet distribution tank, primary sedimentation tank water distribution trough, and perforated flower walls for water distribution, resulting in more uniform water distribution and smoother hydraulic flow. An air stirring pipe is installed in the primary sedimentation dosing tank to ensure optimal mixing of the chemicals, making it easier for suspended solids in the tank to flocculate and settle. Additionally, it reduces chemical consumption, power consumption, and water treatment costs to a certain extent. The structure of this device and the water distribution method applied to it can provide a reference for the optimized design of pretreatment tank inlet systems. Attached Figure Description
[0014] Figure 1 This is one of the structural schematic diagrams of this utility model.
[0015] Figure 2 This is the second schematic diagram of the structure of this utility model.
[0016] Figure 3 This is section view 1-1.
[0017] Figure 4 This is section view 2-2.
[0018] Figure 5 This is a 3-3 cross-sectional view.
[0019] Figure 6 This is section 4-4.
[0020] Figure 7 This is section view 5-5.
[0021] Figure 8 This is a schematic diagram of the air mixing pipe installation.
[0022] In the diagram, 1-Inlet water distribution well, 2-Grit chamber, 3-Passing holes, 3.1-First passing hole, 3.2-Second passing hole, 3.3-Third passing hole, 3.4-Fourth passing hole, 3.5-Fifth passing hole, 3.6-Sixth passing hole, 3.7-Seventh passing hole, 3.8-Eighth passing hole, 3.9-Ninth passing hole, 3.10-Tenth passing hole, 3.11-Eleventh passing hole, 4-Primary sedimentation and chemical dosing tank, 4.1-First primary sedimentation and chemical dosing tank, 4.2-Second primary sedimentation and chemical dosing tank, 4.3-Third primary sedimentation and chemical dosing tank Chemical tank, 4.4-Fourth primary sedimentation chemical tank, 4.5-Fifth primary sedimentation chemical tank, 4.6-Sixth primary sedimentation chemical tank, 4.7-Seventh primary sedimentation chemical tank, 4.8-Eighth primary sedimentation chemical tank, 4.9-Ninth primary sedimentation chemical tank, 4.10-Tenth primary sedimentation chemical tank, 5-Electric pre-drilled gate valve, 6-Primary sedimentation tank inlet and distribution tank, 7-Primary sedimentation tank distribution trough, 8-Perforated flower wall, 8.1-Rectangular hole, 9-Primary sedimentation tank, 10-Inlet pipe, 11-Waterproof sleeve, 12-Air agitator pipe, 13-Manual ball valve. Detailed Implementation
[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.
[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0025] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.
[0026] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0027] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0028] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0029] like Figure 1The pretreatment tank inlet system shown includes an inlet water distribution well 1, a bar screen channel 2, a water passage hole 3, a primary sedimentation chemical dosing tank 4, an electric pre-drilled gate 5, a primary sedimentation tank inlet water distribution tank 6, a primary sedimentation tank water distribution trough 7, a perforated flower wall 8, a primary sedimentation tank 9, an inlet pipe 10, a waterproof sleeve 11, an air mixing pipe 12, and a manual ball valve 13. The components are connected to form a square system. In this device, the inlet distribution well 1 is located at the lower right of the system to evenly distribute the water in the pool into the two-compartment bar screen channel 2. The inlet pipe 10 passes through the bottom of the inlet distribution well 1 and is tightly fixedly connected to the inlet distribution well 1 with the waterproof sleeve 11. The two-compartment bar screen channel 2 is located to the left of the inlet distribution well 1 to intercept larger suspended solids and floating objects in the sewage and wastewater. A ten-compartment primary sedimentation dosing tank 4 is arranged directly above the inlet distribution well 1 and the bar screen channel 2 for adding coagulant. An air stirring pipe 12 is arranged at a certain distance from the bottom of the primary sedimentation dosing tank 4. On the one hand, it is used to stir the water to prevent the suspended solids in the water from settling and to facilitate the thorough and uniform mixing of the coagulant added in the primary sedimentation dosing tank 4 with the water. On the other hand, it accelerates the transfer of oxygen from the air to the water to achieve the purpose of oxygenation. It also enhances the contact between organic matter, microorganisms and dissolved oxygen, which is conducive to the oxidation and decomposition of organic matter in sewage and wastewater.
[0030] The air mixing pipe 12 of this device is equipped with a manual ball valve 13 to control the amount of air in each primary sedimentation dosing tank 4. Water passage holes 3 are provided at different locations in the primary sedimentation dosing tank 4. Electric pre-drilled gate valves 5 are installed on the uppermost wall of the primary sedimentation dosing tank 4 near the two water passage holes 3 to control the water inflow into each primary sedimentation tank's inlet distribution tank 6. Two primary sedimentation tank inlet distribution tanks 6 are arranged directly above the primary sedimentation dosing tank 4. Primary sedimentation tank water distribution troughs 7 are respectively installed on the side of the two primary sedimentation tank inlet distribution tanks 6 near the wall of the primary sedimentation dosing tank 4. Primary sedimentation tanks 9 are arranged directly above the two primary sedimentation tank inlet distribution tanks 6. The common wall along the length of the two primary sedimentation tank inlet distribution tanks 6 and the two primary sedimentation tanks 9 is respectively set as perforated decorative walls 8 for water distribution.
[0031] In this device, the common wall between the water inlet distribution well 1 and the two grid channels 2 is set as a flow weir, and the water level in the water inlet distribution well 1 is higher than the water level in the grid channels 2 to ensure that the water flow is gravity flow.
[0032] In another embodiment, such as Figure 2As shown, the primary sedimentation chemical addition tank 4 is set up with multiple compartments, specifically ten compartments, including the first primary sedimentation chemical addition tank 4.1, the second primary sedimentation chemical addition tank 4.2, the third primary sedimentation chemical addition tank 4.3, the fourth primary sedimentation chemical addition tank 4.4, the fifth primary sedimentation chemical addition tank 4.5, the sixth primary sedimentation chemical addition tank 4.6, the seventh primary sedimentation chemical addition tank 4.7, the eighth primary sedimentation chemical addition tank 4.8, the ninth primary sedimentation chemical addition tank 4.9, and the tenth primary sedimentation chemical addition tank 4.10. Specifically, in this embodiment, the leftmost part of the pretreatment tank inlet system is set as the first primary sedimentation dosing tank 4.1. The primary sedimentation dosing tanks to the right of the first primary sedimentation dosing tank 4.1 are arranged in two rows. The lower row, from left to right, consists of the third primary sedimentation dosing tank 4.3, the fourth primary sedimentation dosing tank 4.4, the fifth primary sedimentation dosing tank 4.5, the sixth primary sedimentation dosing tank 4.6, and the seventh primary sedimentation dosing tank 4.7. The lower row, from left to right, consists of the second primary sedimentation dosing tank 4.2, the tenth primary sedimentation dosing tank 4.10, the ninth primary sedimentation dosing tank 4.9, and the eighth primary sedimentation dosing tank 4.8.
[0033] The length of the first primary sedimentation tank 4.1 is equal to the sum of the widths of the upper and lower rows of primary sedimentation tanks 4. The widths of the primary sedimentation tanks 4 in the upper and lower rows are the same. The second primary sedimentation tank 4.2 and the third primary sedimentation tank 4.3 are the same size. The fourth primary sedimentation tank 4.4 and the fifth primary sedimentation tank 4.5 are the same size, and the sum of the lengths of the fourth primary sedimentation tank 4.4 and the fifth primary sedimentation tank 4.5 is equal to the length of the tenth primary sedimentation tank 4.10. The sixth primary sedimentation tank 4.6, the seventh primary sedimentation tank 4.7, the eighth primary sedimentation tank 4.8, and the ninth primary sedimentation tank 4.9 are the same size. This arrangement is not only aesthetically pleasing, but also increases the hydraulic flow in the primary sedimentation tanks 4, making the mixing of the chemicals and water more uniform and effective.
[0034] In another embodiment, the direction control of the water flow is also very important, such as Figure 4-5As shown, the primary sedimentation dosing tank 4 of this utility model is provided with water passage holes 3 at different locations. Specifically: a first water passage hole 3.1 is provided at the lowest end of the first primary sedimentation dosing tank 4.1, and the width of the first water passage hole 3.1 is the same as the width of the first primary sedimentation dosing tank 4.1; a second water passage hole 3.2 is provided at the common wall between the first primary sedimentation dosing tank 4.1 and the second primary sedimentation dosing tank 4.2, and the width of the second water passage hole 3.2 is the same as the width of the second primary sedimentation dosing tank 4.2; in the second primary sedimentation dosing tank... A third water passage 3.3 is provided on the left end of the common wall between chemical tank 4.2 and the third primary sedimentation chemical tank 4.3; a fourth water passage 3.4 is provided on the common wall between the third primary sedimentation chemical tank 4.3 and the fourth primary sedimentation chemical tank 4.4; a fifth water passage 3.5 is provided on the common wall between the fourth primary sedimentation chemical tank 4.4 and the fifth primary sedimentation chemical tank 4.5; a sixth water passage 3.6 is provided on the common wall between the fifth primary sedimentation chemical tank 4.5 and the sixth primary sedimentation chemical tank 4.6; and a third water passage 3.6 is provided on the sixth primary sedimentation chemical tank... A seventh water passage 3.7 is provided in the common wall between dosing tank 4.6 and the seventh primary sedimentation dosing tank 4.7. The fourth, fifth, sixth, and seventh water passages 3.4 and 3.7 are the same size, and their width is equal to the width of each primary sedimentation dosing tank 4 in the lower row. An eighth water passage 3.8 is provided on the right side of the common wall between the seventh and eighth primary sedimentation dosing tanks 4.7 and 4.8. A seventh water passage 3.8 is provided in the common wall between the eighth and ninth primary sedimentation dosing tanks 4.8 and 4.9. A ninth water passage 3.9 is provided at the main body. A tenth water passage 3.10 is provided at the common wall between the ninth primary sedimentation and chemical addition tank 4.9 and the tenth primary sedimentation and chemical addition tank 4.10. The ninth water passage 3.9 and the tenth water passage 3.10 are the same size, and their width is equal to the width of each primary sedimentation and chemical addition tank 4 in the upper row. An eleventh water passage 3.11 is provided at a certain distance from both ends of the tenth primary sedimentation and chemical addition tank 4.10 on the common wall between the tenth primary sedimentation and chemical addition tank 4.10 and the primary sedimentation tank inlet distribution tank 6. These water passages can effectively regulate the water flow and distribute water more efficiently.
[0035] In another embodiment, to ensure better and more uniform mixing of the water distribution and preparation of the agent, such as... Figure 4-8As shown, the bottom elevation of the first water passage 3.1 is flush with the bottom elevation of the grid channel 2; the bottom elevations of the second water passage 3.2, fourth water passage 3.4, sixth water passage 3.6, eighth water passage 3.8, and tenth water passage 3.10 are flush with the bottom elevation of the primary sedimentation and chemical addition tank 4 and lower than the bottom elevation of the first water passage 3.1; the bottom elevations of the third water passage 3.3, fifth water passage 3.5, seventh water passage 3.7, ninth water passage 3.9, and eleventh water passage 3.10 are also flush with the bottom elevation of the primary sedimentation and chemical addition tank 4. The top elevation of hole 3.11 is level with the water level in the primary sedimentation and chemical addition tank 4, and the bottom elevation of hole 3.11 is higher than the bottom elevation of the primary sedimentation and chemical addition tank 4 and higher than the bottom elevation of the first water passage hole 3.1. This arrangement of water passage holes 3 not only ensures smooth water flow and enables gravity flow along the flow path, but also the water flow direction is a vertical deflection type. On the one hand, it can prevent short-circuiting of water flow and ensure that there is no stagnant water in the primary sedimentation and chemical addition tank 4. On the other hand, it makes the mixing of chemicals and water in the primary sedimentation and chemical addition tank 4 more thorough and uniform.
[0036] In this device, the perforated flower wall 8 of this utility model has rectangular holes 8.1. Each perforated flower wall 8 has three rows of rectangular holes 8.1 arranged in the middle position. There is a certain distance between the rectangular holes 8.1 and between them and the wall. All holes are located below the water level of the primary sedimentation tank 9 and the primary sedimentation tank inlet distribution tank 6. The advantage of this arrangement is that the rectangular structure of the holes 8.1 facilitates construction, and the flow rate is evenly distributed on the inlet section without affecting the load-bearing structure of the perforated flower wall 8, thereby reducing the disturbance and impact on the sedimentation tank.
[0037] Furthermore, the bottom elevation of the primary sedimentation tank water distribution trough 7 described in this utility model is flush with the bottom elevation of the eleventh water passage 3.11 and higher than the top elevation of the rectangular hole 8.1. The portion of the primary sedimentation tank inlet water distribution tank 6 that is lower than the bottom elevation of the lowest row of rectangular holes 8.1 is a solid structure. This arrangement can avoid dead water zones in the primary sedimentation tank inlet water distribution tank 6 and help reduce head loss. The addition of the primary sedimentation tank water distribution trough 7 to the primary sedimentation tank inlet water distribution tank 6 can reduce the impact force of the water coming out of the eleventh water passage 3.11 on the perforated flower wall 8 while achieving uniform water distribution.
[0038] In another embodiment, to facilitate the control of water flow direction, the water level elevation relationship in each pool of this device is as follows: grating channel 2 > primary sedimentation chemical addition pool 4 > primary sedimentation pool inlet distribution pool 6 > primary sedimentation pool 9, which ensures that the hydraulic flow of the entire system is gravity flow. The sewage flow direction is: inlet pipe 10 → inlet distribution well 1 → grating channel 2 → first primary sedimentation chemical addition pool 4.1 → second primary sedimentation chemical addition pool 4.2 → third primary sedimentation chemical addition pool 4.3 → fourth primary sedimentation chemical addition pool 4.4 → fifth primary sedimentation chemical addition pool 4.5 → sixth primary sedimentation chemical addition pool 4.5 → seventh primary sedimentation chemical addition pool 4.7 → eighth primary sedimentation chemical addition pool 4.8 → ninth primary sedimentation chemical addition pool 4.9 → tenth primary sedimentation chemical addition pool 4.9 → primary sedimentation pool distribution trough 7 → primary sedimentation pool inlet distribution pool 6 → primary sedimentation pool 9. Specifically, the wastewater flow method of the pretreatment tank inlet system is as follows: Wastewater first flows into the inlet distribution well 1 through the inlet pipe 10. Then, the wastewater in the distribution well 1 flows over the weir and evenly into the two-compartment grit chamber 2. The wastewater in the grit chamber 2 flows into the first primary sedimentation and chemical addition tank 4.1 through the first through hole 3.1. The wastewater in the first primary sedimentation and chemical addition tank 4.1 flows into the second primary sedimentation and chemical addition tank 4.2 through the second through hole 3.2. Wastewater in section 2 flows into the third primary sedimentation and chemical dosing tank 4.3 through the third through-hole 3.3. Wastewater in the third primary sedimentation and chemical dosing tank 4.3 flows into the fourth primary sedimentation and chemical dosing tank 4.4 through the fourth through-hole 3.4. Wastewater in the fourth primary sedimentation and chemical dosing tank 4.4 flows into the fifth primary sedimentation and chemical dosing tank 4.5 through the fifth through-hole 3.5. Wastewater in the fifth primary sedimentation and chemical dosing tank 4.5 flows into the sixth primary sedimentation and chemical dosing tank 4.6 through the sixth through-hole 3.6. Wastewater in primary sedimentation and chemical dosing tank 4.6 flows into primary sedimentation and chemical dosing tank 4.7 through the seventh throughlet hole 3.7. Wastewater in primary sedimentation and chemical dosing tank 4.7 flows into primary sedimentation and chemical dosing tank 4.8 through the eighth throughlet hole 3.8. Wastewater in primary sedimentation and chemical dosing tank 4.8 flows into primary sedimentation and chemical dosing tank 4.9 through the ninth throughlet hole 3.9. Wastewater in primary sedimentation and chemical dosing tank 4.9 flows into primary sedimentation and chemical dosing tank 4.9 through the tenth throughlet hole 3.10. In the chemical dosing tank 4.10, the flow rate into the primary sedimentation tank inlet distribution tank 6 is controlled by the electrically operated pre-drilled gate 5. Wastewater from the tenth primary sedimentation chemical dosing tank 4.10 flows evenly into the two primary sedimentation tank distribution channels 7 through the eleventh through-hole 3.11. Wastewater from the distribution channels 7 then flows into the primary sedimentation tank inlet distribution tank 6 through the weir. Finally, wastewater from the primary sedimentation tank inlet distribution tank 6 flows into the primary sedimentation tank 9 through the rectangular holes 8.1 on the perforated wall 8. This flow direction, combined with the structure of this application, not only results in a reasonable pretreatment tank layout, small footprint, uniform water distribution and low power cost, but also ensures thorough mixing of chemicals in the primary sedimentation chemical dosing tank to maximize efficacy, resulting in low chemical consumption and consequently low water treatment costs.
[0039] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A pretreatment basin influent system characterized by, It includes water distribution well (1), grid channel (2), water hole (3), primary sedimentation dosing tank (4), electric pre-bore gate (5), primary sedimentation tank water distribution tank (6), primary sedimentation tank water distribution tank (7), perforated flower wall (8), primary sedimentation tank (9), water inlet pipe (10), waterproof sleeve pipe (11), air stirring pipe (12), manual ball valve (13), each part is connected to constitute a square system; The right lower part of the system is provided with water distribution well (1) for uniformly distributing water in the tank to grid channel (2), water inlet pipe (10) passes through the bottom of water distribution well (1) and is closely fixed with waterproof sleeve pipe (11) in water distribution well (1); The grid channel (2) for intercepting larger suspended solids and floating matter in sewage and waste water is arranged on the left side of water distribution well (1); The primary sedimentation dosing tank (4) for coagulant dosing is arranged above water distribution well (1) and grid channel (2), air stirring pipe (12) is arranged near the bottom of primary sedimentation dosing tank (4), manual ball valve (13) for controlling air quantity in each primary sedimentation dosing tank (4) is arranged on air stirring pipe (12); Water hole (3) is arranged in different parts of primary sedimentation dosing tank (4); Electric pre-bore gate (5) for controlling water quantity in each primary sedimentation tank water distribution tank (6) is arranged on the uppermost wall of primary sedimentation dosing tank (4) near two water holes (3); Two primary sedimentation tank water distribution tanks (6) are arranged above primary sedimentation dosing tank (4); Primary sedimentation tank (9) is arranged above two primary sedimentation tank water distribution tanks (6) respectively, and the common wall between two primary sedimentation tank water distribution tanks (6) and two primary sedimentation tanks (9) in length direction is arranged as perforated flower wall (8).
2. A pretreatment basin influent system according to claim 1, wherein: The primary sedimentation medicament adding tank (4) is provided with multiple cells, including a first cell primary sedimentation medicament adding tank (4.1), a second cell primary sedimentation medicament adding tank (4.2), a third cell primary sedimentation medicament adding tank (4.3), a fourth cell primary sedimentation medicament adding tank (4.4), a fifth cell primary sedimentation medicament adding tank (4.5), a sixth cell primary sedimentation medicament adding tank (4.6), a seventh cell primary sedimentation medicament adding tank (4.7), an eighth cell primary sedimentation medicament adding tank (4.8), a ninth cell primary sedimentation medicament adding tank (4.9), and a tenth cell primary sedimentation medicament adding tank (4.10). The first cell primary sedimentation medicament adding tank (4.1) is arranged at the middle left side of the system, the second cell primary sedimentation medicament adding tank (4.2) and the third cell primary sedimentation medicament adding tank (4.3) are symmetrically arranged at one side of the first cell primary sedimentation medicament adding tank (4.1), the fourth cell primary sedimentation medicament adding tank (4.4), the fifth cell primary sedimentation medicament adding tank (4.5), the sixth cell primary sedimentation medicament adding tank (4.6), and the seventh cell primary sedimentation medicament adding tank (4.7) are sequentially arranged at one side of the third cell primary sedimentation medicament adding tank (4.3), the tenth cell primary sedimentation medicament adding tank (4.10), the ninth cell primary sedimentation medicament adding tank (4.9), and the eighth cell primary sedimentation medicament adding tank (4.8) are sequentially arranged at one side of the second cell primary sedimentation medicament adding tank (4.2), the length of the first cell primary sedimentation medicament adding tank (4.1) is equal to the sum of the widths of the upper and lower rows of primary sedimentation medicament adding tanks (4), the widths of the primary sedimentation medicament adding tanks (4) in the upper and lower rows are the same, the second cell primary sedimentation medicament adding tank (4.2) and the third cell primary sedimentation medicament adding tank (4.3) are the same in size, the fourth cell primary sedimentation medicament adding tank (4.4) and the fifth cell primary sedimentation medicament adding tank (4.5) are the same in size, the sum of the lengths of the fourth cell primary sedimentation medicament adding tank (4.4) and the fifth cell primary sedimentation medicament adding tank (4.5) is equal to the length of the tenth cell primary sedimentation medicament adding tank (4.10), and the sixth cell primary sedimentation medicament adding tank (4.6), the seventh cell primary sedimentation medicament adding tank (4.7), the eighth cell primary sedimentation medicament adding tank (4.8), and the ninth cell primary sedimentation medicament adding tank (4.9) are the same in size.
3. A pretreatment basin influent system according to claim 2, wherein: The water overflow holes (3) are arranged at different positions in the primary sedimentation dosing tank (4), including the first water overflow hole (3.1) arranged at the lowermost end of the first primary sedimentation dosing tank (4.1), the width of the first water overflow hole (3.1) being the same as the width of the first primary sedimentation dosing tank (4.1); the second water overflow hole (3.2) arranged at the common wall between the first primary sedimentation dosing tank (4.1) and the second primary sedimentation dosing tank (4.2), the width of the second water overflow hole (3.2) being the same as the width of the second primary sedimentation dosing tank (4.2); the third water overflow hole (3.3) arranged at the left end of the common wall between the second primary sedimentation dosing tank (4.2) and the third primary sedimentation dosing tank (4.3); the fourth water overflow hole (3.4) arranged at the common wall between the third primary sedimentation dosing tank (4.3) and the fourth primary sedimentation dosing tank (4.4); the fifth water overflow hole (3.5) arranged at the common wall between the fourth primary sedimentation dosing tank (4.4) and the fifth primary sedimentation dosing tank (4.5); the sixth water overflow hole (3.6) arranged at the common wall between the fifth primary sedimentation dosing tank (4.5) and the sixth primary sedimentation dosing tank (4.6); the seventh water overflow hole (3.7) arranged at the common wall between the sixth primary sedimentation dosing tank (4.6) and the seventh primary sedimentation dosing tank (4.7), the fourth water overflow hole (3.4), the fifth water overflow hole (3.5), the sixth water overflow hole (3.6) and the seventh water overflow hole (3.7) having the same size, and the width thereof being equal to the width of each primary sedimentation dosing tank (4) in the lower row; the eighth water overflow hole (3.8) arranged at the right end of the common wall between the seventh primary sedimentation dosing tank (4.7) and the eighth primary sedimentation dosing tank (4.8); the ninth water overflow hole (3.9) arranged at the common wall between the eighth primary sedimentation dosing tank (4.8) and the ninth primary sedimentation dosing tank (4.9); the tenth water overflow hole (3.10) arranged at the common wall between the ninth primary sedimentation dosing tank (4.9) and the tenth primary sedimentation dosing tank (4.10); the ninth water overflow hole (3.9) and the tenth water overflow hole (3.10) having the same size, and the width thereof being equal to the width of each primary sedimentation dosing tank (4) in the upper row; and the eleventh water overflow holes (3.11) arranged at the common wall between the tenth primary sedimentation dosing tank (4.10) and the primary sedimentation tank water distribution tank (6) and close to the left and right ends of the tenth primary sedimentation dosing tank (4.10).
4. A pretreatment basin influent system according to claim 2, wherein: The bottom level of the first water passage (3.1) is flush with the bottom level of the grid channel (2), the bottom level of the second water passage (3.2), the fourth water passage (3.4), the sixth water passage (3.6), the eighth water passage (3.8) and the tenth water passage (3.10) is flush with the bottom level of the primary sedimentation tank (4) and lower than the bottom level of the first water passage (3.1); the top level of the third water passage (3.3), the fifth water passage (3.5), the seventh water passage (3.7), the ninth water passage (3.9) and the eleventh water passage (3.11) is flush with the water level in the primary sedimentation tank (4), the bottom level of which is higher than the bottom level of the primary sedimentation tank (4) and the bottom level of the first water passage (3.1).
5. A pretreatment basin influent system according to claim 1, wherein: Rectangular holes (8.1) are arranged on the perforated flower wall (8), three rows of rectangular holes (8.1) are arranged on each perforated flower wall (8) and located at the middle position of the perforated flower wall (8), and the positions of all the holes are below the water surface level of the primary sedimentation tank (9) and the primary sedimentation tank water distribution tank (6).
6. A pretreatment basin influent system as claimed in claim 2 or 5, wherein: The primary sedimentation tank water distribution tank (7) is arranged on the side of the two-grid primary sedimentation tank water distribution tank (6) close to the primary sedimentation tank (4) wall, the bottom level of the primary sedimentation tank water distribution tank (7) is flush with the bottom level of the eleventh water passage (3.11) and higher than the top level of the rectangular hole (8.1), and the part of the primary sedimentation tank water distribution tank (6) below the bottom level of the lowest row of rectangular holes (8.1) is solid.
7. A pretreatment basin influent system as claimed in claim 6, wherein: The elevation of the grid channel (2) is higher than the elevation of the primary sedimentation tank (4), the elevation of the primary sedimentation tank water distribution tank (6) and the elevation of the primary sedimentation tank (9).