Sewage collection and quality-based discharge structure

Abstract

The utility model discloses a sewage collection quality-divided discharge structure, which comprises a pool wall, a wharf sewage collection open trench, an overflow well, a silt / sewage diversion well and a valve group area, one end of the wharf sewage collection open trench is connected with the silt / sewage diversion well, one side of the silt / sewage diversion well is provided with a quality-divided sewage collection pool, and the other side of the quality-divided sewage collection pool is provided with an overflow well. The quality-divided sewage collection pool comprises a rain sewage area and a production sewage area, a rain sewage discharge pipe culvert and a production sewage discharge pipe culvert are connected between the quality-divided sewage collection pool and the silt / sewage diversion well, overflow in front of the pool is adopted, and the situation that a large amount of rainwater enters the quality-divided sewage collection pool and is mixed with a large amount of collected sewage in the pool, impacts and rolls over is avoided; and the water surface oil film and other floating pollutants are directly discharged into the sea in an overflowing manner, so that the sewage collection effect is improved, the desilting is convenient, the sewage mixing amount is also greatly reduced, the realization and optimization of a subsequent sewage treatment process are facilitated, and the subsequent sewage treatment cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of wastewater discharge technology, specifically a wastewater collection and discharge structure. Background Technology

[0002] Traditional bulk cargo terminals for coal, ore, etc., are equipped with systems for collecting, storing, and discharging production wastewater and initial rainwater. Collection systems typically use open ditches covered with steel gratings, while storage systems often employ wastewater collection ponds. Discharge systems combine overflow discharge from the ponds with a pressurized flow system downstream. Bulk cargo terminals are usually reinforced concrete structures with a permeability coefficient between 0.85 and 0.95. Initial rainwater forms surface runoff quickly and in large volumes. Current technology often involves simultaneous pressurized discharge of rainwater and wastewater and overflow into the sea. Production wastewater collected in the ponds is churned by rainwater, causing oil slicks and other floating pollutants to overflow directly into the nearby sea, polluting the surrounding waters. The initial rainwater collection and discharge systems fail to achieve their intended effects. Furthermore, the large volume of wastewater storage ponds makes hydraulic engineering difficult during construction, hindering the full utilization of pipe and channel capacity. Separate discharge of wastewater by type is also impossible, complicating subsequent wastewater treatment processes and requiring additional investment. Based on the "Environmental Protection Design Code for Water Transport Engineering" JTS149-2008 and the "Outdoor Drainage Design Standard" GB50014-2021, this utility model achieves "zero" discharge of polluted rainwater by adopting the method of overflow in front of the pool and diversion in the pool, while keeping the existing facilities as little as possible. Initial rainwater and industrial wastewater are collected and discharged separately in the same system, which has certain reference and promotion significance for the construction of new wharves and the renovation of old wharves. Utility Model Content

[0003] To address the shortcomings of existing technologies, this invention provides a wastewater collection and discharge structure that minimizes changes to the general wastewater collection methods used in bulk cargo terminals, facilitating the renovation of existing terminals and ensuring the reliability and practicality of the system.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a wastewater collection and discharge structure, comprising a pool wall, a wharf wastewater collection ditch, an overflow well, a sludge / sewage separation well, and a valve group area. One end of the wharf wastewater collection ditch is connected to the sludge / sewage separation well. A separate wastewater collection pool is provided on one side of the sludge / sewage separation well. The separate wastewater collection pool includes a rainwater and sewage area and a production wastewater area. A partition wall is provided between the rainwater and sewage area and the production wastewater area. A rainwater and sewage discharge culvert and a production wastewater discharge culvert are connected between the separate wastewater collection pool and the sludge / sewage separation well.

[0005] Preferably, the valve group includes a rainwater and sewage pressure discharge pipe and a production wastewater pressure discharge pipe, which are connected by a connecting pipe. A second gate valve is installed on the connecting pipe. A first gate valve and a check valve are installed on both the rainwater and sewage pressure discharge pipe and the production wastewater pressure discharge pipe. One end of each pipe is connected to the rainwater and sewage area and the production wastewater area, respectively, and a submersible sewage pump is installed at each connection point. A third gate valve is installed on the production wastewater pressure discharge pipe.

[0006] Preferably, the rainwater and sewage area, the production sewage area, and the sludge / sewage separation well are all equipped with manhole covers.

[0007] Preferably, the open ditch for collecting sewage at the dock and the overflow well are connected by an overflow grid window and an overflow pipe, and one end of the overflow well is connected to an overflow discharge pipe.

[0008] Preferably, the sludge / sewage diversion well has a 200mm high sludge zone at the bottom of the well, and the wastewater discharge culvert is located at the bottom of the sludge / sewage diversion well.

[0009] Preferably, the pool wall is provided with a high liquid level, a partition wall top, and a low liquid level.

[0010] Beneficial effects

[0011] This utility model provides a wastewater collection and separate discharge structure, which has the following beneficial effects:

[0012] 1. By adopting the overflow method at the front of the pool, the large amount of rainwater entering the separate sewage collection pool and mixing with the sewage already collected in the pool is avoided, which would cause the water to churn and roll, and the oil film and other floating pollutants on the water surface would be directly overflowed and discharged into the sea, thus improving the sewage collection efficiency.

[0013] 2. Based on the characteristics of sewage discharge at the dock, a dust / sludge / sewage separation well was adopted to achieve the pre-separation of production sewage and rainwater sewage in front of the pool. This provides a prerequisite for subsequent separate storage, discharge and separate treatment of sewage, reducing subsequent engineering investment and saving sewage treatment costs.

[0014] 3. Wastewater is stored and discharged separately in the wastewater collection tank, which facilitates sludge removal and greatly reduces the amount of wastewater mixed, which is conducive to the implementation and optimization of subsequent wastewater treatment processes and reduces subsequent wastewater treatment costs.

[0015] 4. This sewage collection system can effectively utilize the volume of the entire system. The volume of the sewage collection tank is smaller than that of traditional sewage collection systems, which makes it easier for the dock to implement in hydraulic engineering design.

[0016] 5. Compared with traditional sewage collection systems, the present invention requires less structural modification and can be used not only for new wharves but also for the renovation of existing wharf systems. The reduced volume of the sewage collection tank can be used to construct the overflow well and dust / sludge separation well of the present system. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the planar structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the front cross-sectional structure of this utility model.

[0019] Figure 3 This is a side sectional view of the present invention.

[0020] Figure 4 This is a schematic diagram of the lateral cross-sectional structure of the sludge / sewage diversion well of the present invention.

[0021] Figure 5 This is a schematic diagram of the side cross-sectional structure of the overflow well of this utility model.

[0022] In the diagram: 1. Pool wall; 2. Submersible sewage pump; 3. Separator wall; 4. Rainwater and sewage area; 5. Industrial wastewater area; 6. Valve assembly area; 7. Sediment / sewage separation well; 8. Overflow well; 9. Overflow discharge pipe; 10. Rainwater and sewage discharge culvert; 11. Industrial wastewater discharge culvert; 12. Dock sewage collection ditch; 13. Manhole cover; 14. First gate valve; 15. Check valve; 16. Second gate valve; 17. Third gate valve; 18. Connecting pipe; 19. Rainwater and sewage pressure discharge pipe; 20. Industrial wastewater pressure discharge pipe; 21. Overflow grating; 22. Dust and sludge area; 23. High liquid level; 24. Top of separator wall; 25. Low liquid level; 26. Overflow pipe. Detailed Implementation

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] Please see Figure 1-5A wastewater collection and discharge structure includes a pool wall 1, a wharf wastewater collection ditch 12, an overflow well 8, a sludge / sewage separation well 7, and a valve group area 6. One end of the wharf wastewater collection ditch 12 is connected to the sludge / sewage separation well 7. A separate wastewater collection pool is provided on one side of the sludge / sewage separation well 7. The separate wastewater collection pool includes a rainwater and sewage area 4 and a production wastewater area 5. A partition wall 3 is provided between the rainwater and sewage area 4 and the production wastewater area 5. A rainwater and sewage discharge culvert 10 and a production wastewater discharge culvert 11 are connected between the separate wastewater collection pool and the sludge / sewage separation well 7.

[0025] Furthermore, the valve group 6 includes a rainwater and sewage pressure discharge pipe 19 and a production sewage pressure discharge pipe 20. The rainwater and sewage pressure discharge pipe 19 and the production sewage pressure discharge pipe 20 are connected by a connecting pipe 18. A second gate valve 16 is installed on the connecting pipe 18. A first gate valve 14 and a check valve 15 are installed on both the rainwater and sewage pressure discharge pipe 19 and the production sewage pressure discharge pipe 20. One end of the rainwater and sewage pressure discharge pipe 19 and the production sewage pressure discharge pipe 20 are respectively connected to the rainwater and sewage area 4 and the production sewage area 5, and a submersible sewage pump 2 is installed at the connection point. A third gate valve 17 is installed on the production sewage pressure discharge pipe 20.

[0026] Furthermore, manhole covers 13 are provided on the rainwater and sewage area 4, the production sewage area 5, and the sedimentation / sewage diversion well 7.

[0027] Furthermore, the open sewage collection ditch 12 at the dock and the overflow well 8 are connected by an overflow grid window 21 and an overflow pipe 26, and one end of the overflow well 8 is connected to an overflow discharge pipe 9.

[0028] Furthermore, the sludge / sewage diversion well 7 has a 200mm high sludge zone 22 at the bottom of the well, and the production wastewater discharge culvert 11 is located at the bottom of the sludge / sewage diversion well 7.

[0029] Furthermore, the pool wall 1 is provided with a high liquid level 23, a partition wall top 24, and a low liquid level 25.

[0030] Example: The open ditch 12 for collecting wastewater from the bulk cargo terminal collects industrial wastewater and rainwater. An overflow tank is located at the end of the ditch, near the separate wastewater collection tank. The ditch wall is equipped with a grating screen. Clean rainwater overflows through the grating screen and enters the overflow well 8. A drainage steel pipe or reinforced concrete pipe is pre-embedded at the bottom of the overflow well 8, through which the overflowing clean rainwater is discharged into the sea.

[0031] The sludge / sewage separation system is located in the same well. Industrial wastewater is discharged through the bottom discharge pipe to the industrial wastewater zone 5 of the wastewater collection tank. Initial rainwater is discharged through the middle and lower discharge pipes within the well to the rainwater and sewage zone 4 of the wastewater collection tank. The separate wastewater collection tank is divided into two zones: rainwater and sewage zone 4 and industrial wastewater zone 5. The effective volume of industrial wastewater zone 5 refers to the volume formed by the height difference from the low liquid level 25 to the top of the partition wall 24. The low liquid level 25 is determined based on the minimum submersion depth of the pump. The effective volume should be large enough to allow for normal extraction and storage of a certain amount of regulating water for industrial wastewater. The effective volume V1 of the production wastewater zone 5, which stores rainwater and a very small amount of production wastewater during rainfall, refers to the volume formed by the height difference from the low liquid level 25 to the high liquid level 23. The effective volume V2 of the rainwater and wastewater zone 4 refers to the volume formed by the height difference from the low liquid level 25 to the high liquid level 23. The storage volume V3 within the wastewater collection pipes and other structures refers to the usable volume at the high liquid level 23. The effective volume of rainwater and wastewater, VYW = V1 + V2 + V3 ≥ the initial rainwater collection volume V. For coal mine wharves, a rainfall depth of 10mm can be used, which is approximately 100m3 based on a 100,000-ton bulk cargo wharf. The initial rainwater quality is better than that of production wastewater, with a much lower suspended solids content. The instantaneous flow rate is large, estimated to be about 25 times that of production wastewater for a 100,000-ton bulk cargo wharf. The discharge time is short. After passing through the wastewater collection system, it is discharged into the larger rainwater and wastewater zone 4, with a small amount discharged into the production wastewater zone 5. The overall water quality fluctuation of the rainwater and wastewater is within the permissible range.

[0032] Valve assembly area 6 is installed at the pressurized sewage discharge end of the separate sewage collection tank. Valve assembly area 6 can be located on the wharf surface or inside a valve well, depending on the characteristics of the wharf. The wharf generates industrial wastewater daily, which is pressurized and transported by submersible pumps located in the industrial wastewater zone. The wastewater flows through the valve assembly and industrial wastewater pipeline network to the industrial wastewater treatment facility outside the boundary area. During rainfall, the submersible pumps in both zones operate in parallel, pressurizing and opening the second gate valve 16 on the connecting pipe 18 between the industrial wastewater pressurized discharge pipe 20 and the rainwater / sewage pressurized discharge pipe 19. Simultaneously, the third gate valve 17 on the industrial wastewater pressurized discharge pipe 20 is closed. Based on the liquid level change, two submersible sewage pumps 2 in rainwater / sewage zone 4 and industrial wastewater zone 5 are simultaneously activated, discharging the wastewater through the rainwater / sewage pressurized discharge pipe 19 to the rainwater / sewage treatment device outside the boundary area for treatment.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wastewater collection and discharge structure, comprising a pool wall (1), a wharf wastewater collection ditch (12), an overflow well (8), a sludge / sewage separation well (7), and a valve assembly area (6), characterized in that, One end of the open ditch (12) for collecting sewage at the wharf is connected to the sedimentation / sewage diversion well (7). A separate sewage collection tank is provided on one side of the sedimentation / sewage diversion well (7). The separate sewage collection tank includes a rainwater and sewage area (4) and a production sewage area (5). A partition wall (3) is provided between the rainwater and sewage area (4) and the production sewage area (5). A rainwater and sewage discharge culvert (10) and a production sewage discharge culvert (11) are connected between the separate sewage collection tank and the sedimentation / sewage diversion well (7).

2. The wastewater collection and discharge structure according to claim 1, characterized in that, The valve group area (6) includes a rainwater and sewage pressure discharge pipe (19) and a production sewage pressure discharge pipe (20). The rainwater and sewage pressure discharge pipe (19) and the production sewage pressure discharge pipe (20) are connected by a connecting pipe (18). A second gate valve (16) is installed on the connecting pipe (18). A first gate valve (14) and a check valve (15) are installed on both the rainwater and sewage pressure discharge pipe (19) and the production sewage pressure discharge pipe (20). One end of the rainwater and sewage pressure discharge pipe (19) and the production sewage pressure discharge pipe (20) are respectively connected to the rainwater and sewage area (4) and the production sewage area (5), and a submersible sewage pump (2) is installed at the connection point. A third gate valve (17) is installed on the production sewage pressure discharge pipe (20).

3. The wastewater collection and discharge structure according to claim 1, characterized in that, The rainwater and sewage area (4), the production sewage area (5), and the sludge / sewage separation well (7) are all equipped with manhole covers (13).

4. The wastewater collection and discharge structure according to claim 2, characterized in that, The open ditch (12) for collecting sewage at the dock and the overflow well (8) are connected by an overflow grid window (21) and an overflow pipe (26). One end of the overflow well (8) is connected to an overflow discharge pipe (9).

5. The wastewater collection and separate discharge structure according to claim 1, characterized in that, The sedimentation / sewage separation well (7) has a sedimentation zone 200mm high at the bottom of the well, and the production wastewater discharge culvert (11) is located at the bottom of the sedimentation / sewage separation well (7).

6. The wastewater collection and separate discharge structure according to claim 1, characterized in that, The pool wall (1) is provided with a high liquid level (23), a partition wall top (24), and a low liquid level (25).

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