CN205637031U - Burst online processing discharge system that dams - Google Patents

Abstract

The utility model relates to a city water treatment system field specifically indicates a burst online processing discharge system that dams. Receiving the pool territory and dividing a plurality of sections into according to latticed, the area of every section is 0.2~4 square kilometre, the section in be provided with an at least water drainage branch pipe, at least one vatch basin and the online processing pond of at least one, the water inlet of vatch basin and water drainage branch pipe's exit end intercommunication, initial stage rainwater outlet and main sewer intercommunication, later stage rainwater outlet and online processing pond intercommunication, the emission end and the natural water intercommunication in online processing pond. Solved the delay problem of prior art initial stage rainwater long range transport in -process through set up independent vatch basin in the section, it can carry out corresponding processing by the high -efficient swift later stage rainwater with in the section to set up the online processing pond, has not only alleviateed sewage treatment plant's processing pressure but also avoided initial stage rainwater polluting nature water.

Description

A Fragmentation Closure On-line Discharge System

technical field

The utility model relates to the field of urban water treatment systems, in particular to an on-line treatment and discharge system for fragmentation interception.

Background technique

For diversion rainwater pipelines, at present, each outlet does not have any interception measures, and is directly discharged into natural water bodies, so that the sewage in sunny days and the first rain in rainy days are all discharged into natural water bodies, causing serious pollution to natural water bodies .

For combined pipelines, in many areas, a main sewage pipe is discharged into the sewage treatment plant through the interception well at the end. In rainy days, the rainwater and domestic sewage are discharged to the natural water body through the interception well. In actual operation, in order to save space and engineering cost, the water collection area responsible for the combined discharge system is generally set as large as possible, and then a drain is set at the end of the main sewage pipe for centralized interception and discharge. This kind of drainage system has a big problem. When it rains, the first rainwater and later rainwater in the water collection area are mixed together, and the separation of clean water and sewage is not realized. Finally, the first rainwater pollutants are stored in the initial rainwater storage tank at the end. The concentration is very low, containing a large amount of clean rainwater in the later period, and the rainwater discharged into the natural water body also contains a large amount of initial rain, which causes serious runoff pollution to the natural water body. Due to the large area covered by the water collection area, the delay time of rainwater in pipelines or surface runoff is not fully considered. The initial rain is either directly discharged into natural water bodies and causes serious pollution accidents, or it is mixed with a large amount of later clean rainwater. Convergence into the sewage treatment plant seriously increases the treatment pressure of the sewage treatment plant, and the regulation of the initial rainwater and later rainwater is unreasonable and cannot be completely separated. For example, a city has built a storage tank in an area close to the urban sewage treatment system. Assume that area M is 1 km away from the storage tank, and the urban rainwater in area M is directly discharged to the storage tank through the pipe network. The urban initial rainwater in area M The time for complete discharge to the storage tank is T1. For areas beyond this area that are far away from the storage pool, assuming that the straight-line distance from the N area to the storage pool is 10km, the time for the initial urban rainwater in the N area to completely discharge into the storage pool is T2. From the perspective of the length of time, T2 is obviously much larger than T1. When the storage tank is full of initial rainwater, the excess rainwater will be automatically discharged into the natural water body. The time from the storage tank to collect rainwater to discharge to the natural water body is T3. In actual operation, if only the rainwater discharge in area M is considered, that is, the initial rainwater in area M can enter the sewage treatment system through the storage tank, and the clean rainwater in the later period can be discharged into natural water bodies. T3 needs to be greater than T1. At T3, the storage tank immediately discharges to the natural water body. At this time, the rainwater flowing to the storage tank in the N area is still heavily polluted initial rainwater, that is, T3 is less than T2. Discharging to the natural water body will undoubtedly cause serious pollution.

If only the rainwater discharge in N area is considered, that is, T3 is greater than T2, then the initial rainwater in N area can enter the urban sewage treatment system through the storage tank and be well treated. But for area M, a large amount of later clean rainwater in area M is also discharged into the urban sewage treatment system during the time when the storage tank discharges the initial rainwater in area N. Such discharge will cause great harm to the urban sewage system Deal with stress. In addition, the pipe network in M area and N area is generally connected during actual operation. Due to the difference in distance and the retention effect on the road, the initial rainwater in N area may seriously pollute the later clean rainwater in M area, which will also lead to rainwater discharge. The irrationality of the situation.

Contents of the invention

The purpose of this utility model is to solve the deficiency of the above-mentioned background technology, and provide an on-line treatment and discharge system for fragmentation and interception.

The technical solution of the present utility model is: an on-line treatment and discharge system for fragmentation interception, the water collection area of the system is provided with a sewage main pipe and a drainage branch pipe; the drainage branch pipe is connected with the sewage main pipe, and it is characterized in that: The water collection area is divided into a plurality of areas according to the grid pattern, and the area of each area is 0.2 to 4 square kilometers; at least one drainage branch pipe and at least one interception well are arranged in the area; the interception well Including the water inlet, the initial rainwater outlet and the later rainwater outlet, the water inlet of the interception well is connected to the outlet of the drainage branch pipe, the initial rainwater outlet is connected to the sewage main pipe, the later rainwater outlet is connected to the online treatment pool, and the online treatment pool The discharge end is connected with the natural water body.

Further, the area of each area is 0.5-2 square kilometers.

Further, each block is provided with an online processing pool or several blocks share an online processing pool.

Further, the on-line treatment tank is a group or a combination of devices such as a cyclone, a grit chamber, a hydraulic particle separator, an aeration tank, and an ultraviolet disinfection tank.

Further described interception well is provided with a fixed weir, the initial rainwater discharge outlet is arranged on the sidewall of the interception well between the water inlet of the interception well and the fixed weir, and an intercepting device is arranged at the initial rainwater discharge outlet; the initial rainwater discharge A slag blocking device is provided between the outlet and the fixed weir; an anti-backflow device is provided in the interception well between the fixed weir and the later rainwater outfall.

Further, the anti-backflow device is arranged on the fixed weir; the anti-backflow device includes a guide rail arranged on the side wall of the fixed weir; a door panel is slidably connected to the guide rail; a floating door panel is connected to the door panel. box.

Further, the intercepting device includes a rotating plate arranged on the side wall of the intercepting well; the middle part of the rotating plate is hinged next to the side of the initial rainwater discharge outlet; one end of the rotating plate is provided with a floating ball, and the other end is The opening and closing plate matched with the initial rainwater discharge port; the side wall of the interception well above the rotating plate is provided with a first limit rod and a second limit rod. When the opening and closing plate is fully opened, the opening and closing plate and the When the opening and closing plate completely covers the initial rainwater discharge port, the opening and closing plate is in contact with the second limiting rod.

Further, the height of the top of the fixed weir is higher than the height of the bottom of the floating ball when the opening and closing plate completely covers the initial rainwater discharge port.

Further, the slag blocking device is a plate-shaped structure vertically fixed on the upper end surface of the bottom of the intercepting well, which is at an angle to the side wall of the intercepting well, and the slag blocking device is formed by the wall on the side of the intercepting well where the intercepting device is installed. The included angle is an acute angle.

Further, the slag blocking device is a floating baffle or a hydraulic grill.

Further, the drainage branch pipe is a drainage pipe in a split flow system, a combined flow system or a mixed flow system

It further includes a sewage treatment plant, and the outlet of the main sewage pipe communicates with the sewage treatment plant.

The beneficial effects of the utility model have:

1. Divide the entire water collection area into grid-shaped small areas, and set interception wells in each individual area. This structure can avoid delays in the transportation of initial rainwater far away from the interception wells, and can effectively collect initial rainwater. Separation from the later clean rainwater not only reduces the pressure of the sewage treatment plant but also avoids the initial rainwater from polluting the natural water body. An online treatment pool is set up to collect the later rainwater and perform corresponding treatment. The treated rainwater will be directly discharged into the natural water body without backflow To the sewage treatment plant, first, it can effectively reduce the pollution to natural water bodies, and second, it can greatly alleviate the treatment capacity of the sewage treatment plant;

2. Divide the water collection area into areas with an area of 0.2-4 square kilometers, and set up separate small interception wells in each area, and each interception well handles the rainwater in each area. Due to the small size of the area, the time difference between the far point and the near point of the interception well in each area is small, and the online treatment pool is set to completely separate the initial rainwater and the late rainwater in each area. Therefore, there is no mixing phenomenon between the initial rainwater and the late rainwater, and the treatment effect of rainwater is significantly improved. In addition, each area treats the rainwater in the area through its own interception well, and the rainwater treatment process in different areas can be carried out at the same time, which greatly improves the efficiency of rainwater treatment;

3. Through the combined use of interception wells and drainage branch pipes, an independent small rainwater treatment system for each area is formed, so that rainwater can be treated in a more timely manner, and the heavily polluted initial rainwater can enter the sewage treatment plant to the greatest extent, and the clean rainwater can be automatically discharged later Into the online treatment pool, after the adjustment, storage and settlement of the online treatment pool, it is discharged into the natural water body, which will not pollute the natural water body. In addition, the sewage in the online treatment pool will not flow back to the main sewage pipe, which will not cause the treatment pressure of the sewage treatment plant , the water treatment of this part is completed independently in the area, which is more efficient and avoids increasing the pressure on the sewage treatment plant;

4. By dividing the entire water collection area into smaller areas, and then setting up independent interception wells and online treatment pools in the area to achieve the purpose of first rain storage and treatment, compared with building a total large-scale area in the entire area rainwater regulation and storage system, the independent structure of the utility model is more economical and saves a lot of manpower and material resources;

5. By setting interception wells in the water collection area, and then connecting the interception wells with the online treatment pool, a multi-level water treatment system is formed, which improves the separation efficiency of initial rain and later rainwater, reduces pollution to natural water bodies, and enhances the the efficiency of water treatment;

6. The interception well can discard the initial rain, and determine the abandoned flow according to the initial rainfall in the water collection area. Through this device, the initial rain can be discarded to the sewage treatment plant, and the later rainwater can be directly discharged into the online treatment pool.

The area of each area is 0.2-4 square kilometers. Assuming that the initial rainwater at the farthest end of the interception well enters the interception well, the time is T4. . In actual use, you can directly set T equal to or greater than T4, because the area is relatively small, and the value of T4 is relatively small, only a small part of the later clean rainwater mixed with the initial rainwater enters the sewage treatment plant, so a small part of the rainwater It will not increase the pressure of the sewage treatment plant, and most of the later clean rainwater is directly discharged into the online treatment tank, which effectively improves the separation efficiency of the initial rain and the later rainwater.

The utility model has a simple structure, divides the urban water treatment system into independent areas, and solves the delay problem in the early rainwater long-distance transportation process of the prior art by setting independent interception wells in the areas. The corresponding treatment of the later rainwater in the sewage treatment plant not only reduces the treatment pressure of the sewage treatment plant but also avoids the pollution of natural water by the initial rainwater. The discharge and treatment of rainwater is more reasonable and efficient, and has great promotion value.

Description of drawings

Fig. 1: Schematic diagram of the structure of the water collection area of the utility model;

Fig. 2: the front view of the structure of the interception well of the utility model;

Fig. 3: the top view of the structure of the interception well of the present utility model;

Fig. 4: Structural schematic diagram of the intercepting device of the intercepting well of the present utility model;

Fig. 5: a schematic diagram of the sunny working state of the interception well of the present utility model;

Figure 6: a schematic diagram of the initial rainfall working state of the interception well of the present utility model;

Figure 7: Schematic diagram of the anti-backflow state of the interception well of the present utility model;

Among them: 1- interception well; 2- drainage branch pipe; 3- fixed weir; 4- initial rainwater outfall; 5- interception device; 6- slag blocking device; 7- anti-backflow device; -Floating box; 51-rotating plate; 52-floating ball; 53-opening and closing plate; 54-hinge shaft; 55-first limit rod; 56-second limit rod; pipe; 9-sewage treatment plant; 10-area; 11-on-line treatment pool; 12-natural water body.

detailed description

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail.

As shown in Figures 1 to 7, the water collection area of the drainage system in this embodiment is divided into a plurality of areas 10 according to the grid pattern, and the area of each area 10 is 0.2 to 4 square kilometers, and the optimal water collection area is 0.5 to 2 square kilometers , each area 10 is constructed according to the local terrain, and a plurality of drainage branch pipes 2 are arranged in the area 10 . The drainage branch pipe 2 in this embodiment can be a rainwater branch pipe or a sewage branch pipe, or a branch pipe that collects rainwater and sewage at the same time. The sewage discharge form in the area 10 can be a separate pipe network, a combined pipe network or a mixed flow pipe network. The drainage methods in the area 10 in the system can be the same or different, and they are comprehensively arranged according to the local terrain.

The drainage branch pipe 2 arranged in the area 10 collects rainwater, domestic sewage or industrial waste water in the area, and the outlet end of the drainage branch pipe 2 communicates with the interception well 1 . When the rainwater discharge form in the area 10 is a diversion system, the interception well 1 is located at the outlet of the rainwater branch pipe in each area 10 to separate the heavily polluted initial rainwater from the clean later rainwater. For the combined pipe network and the mixed flow pipe network, due to the small amount of domestic sewage, the proportion of rainwater produced by rainfall is very small. Therefore, in the combined or mixed flow pipe network, domestic sewage and rainwater After mixing, the separation is carried out through the interception well 1.

The intercepting well of this embodiment is shown in Figures 2 to 7. The intercepting well 1 of this embodiment is a concrete member, and the intercepting well 1 has a water inlet, an initial rainwater discharge port 4 and a later rainwater discharge port. The interception well 1 is provided with a fixed weir 3, and the initial rainwater discharge port 4 is arranged on the side wall of the interception well 1 between the water inlet of the interception well 1 and the fixed weir 3. After the initial rainwater is discharged from the water inlet to the interception well 1, it passes through the The initial rainwater discharge port 4 is discharged to the main sewage pipe 8 and enters the sewage treatment plant 9 for comprehensive treatment.

In this embodiment, an intercepting device 5 is provided on the initial rainwater discharge port 4. As shown in FIG. On the side, one end of the rotating plate 51 is provided with a floating ball 52 , and the other end is an opening and closing plate 53 matched with the initial rainwater discharge port 4 . The opening and closing plate 53 rotates under the effect of the floating ball 52. During actual use, the weight and buoyancy of the floating ball 52 can be adjusted. According to the area size of the area 10, the initial rain rainfall in the area 10 is calculated, and the weight and weight of the floating ball 52 are designed. Buoyancy, after the end of the early rain, automatically rotate and block the initial rainwater discharge port 4 to complete the abandonment flow of the early rain.

In order to prevent the rotating plate 51 from excessively rotating, it can always be kept at the initial rainwater discharge port 4 . The present embodiment is provided with the structure of the county committee, including the first limit rod 55 and the second limit rod 56 on the side wall above the initial rainwater discharge port 4 on the interception well 1. When the opening and closing plate 53 is fully opened, the opening and closing plate 53 is in contact with the first limiting rod 55 , and when the opening and closing plate 53 completely covers the initial rainwater discharge port 4 , the opening and closing plate 53 is in contact with the second limiting rod 56 . A support rod 57 is arranged between the two limit rods, and is fixed on the side wall of the interception well 1 through the support rod 57 . The height of the top of the fixed weir 3 is higher than the height of the bottom of the floating ball 52 when the opening and closing plate 53 completely covers the initial rainwater discharge port 4 .

In order to prevent backflow, in this embodiment, an anti-backflow device 7 is provided in the interception well 1 between the fixed weir 3 and the later rainwater outfall. As shown in Figures 5 to 7, the anti-backflow device 7 is arranged on the fixed weir 3. The anti-backflow device 7 includes a guide rail 71 arranged on the side wall of the fixed weir 3. A door panel 72 is slidably connected to the guide rail 71, and the door panel 72 is connected to There is pontoon 73. The door panel 72 moves up and down along the guide rail 71 under the action of the buoyancy tank 73. When the water level in the natural water body 12 is higher than the drainage height in the interception well 1, the interception well 1 is facing the danger of backflow, and the buoyancy tank 73 is driven by hydraulic action The door panel 72 rises to prevent the water in the natural water body 12 from entering the interception well 1 .

Urban rainwater or domestic sewage often contains a large amount of scum. If these scum is directly discharged into the natural water body 12 without treatment, it will cause great pollution to the natural water body 12 and seriously affect the ecological environment. In this embodiment, a slag blocking device 6 is provided between the initial rainwater discharge outlet 4 and the fixed weir 3 .

The slag blocking device 6 is a floating baffle or a hydraulic grill. When the slag blocking device 6 is a floating baffle, guide rails are provided on the walls on both sides of the interception well 1, and the two ends of the baffle can slide up and down respectively to be connected to the guide rails. The baffle is hollow or a floating box structure is installed. Under the action of the water flow, the baffle rises or falls with the fluctuation of the water flow. The lower edge of the baffle is always on the water surface, and the baffle intercepts scum floating in the water. The scum is collected or transported to the sewage treatment plant for comprehensive treatment. In order to facilitate collection, the baffle plate of this embodiment has an included angle with the wall on the side where the initial rainwater discharge port 4 is installed, and the angle is an acute angle, so that under the impact of the water flow, the scum will collect at the front end of the initial rainwater discharge port 4 , and finally collected in the sewage treatment plant.

When the slag blocking device 6 is a hydraulic grill, the two ends of the grill are respectively fixed on the walls on both sides of the interception well 1, and do not move with the fluctuation of the water flow, and the scum stays between the water inlet and the grill after being intercepted by the grill . In addition, the grille is vertically fixed on the upper surface of the bottom of the intercepting well, and there is an angle between the grille and the wall on the side where the initial rainwater discharge outlet 4 is installed, and the angle is an acute angle, and the grille is arranged obliquely. Under the impact of water flow, The scum will be collected at the front end of the initial rainwater discharge outlet 4, and finally be collected at the sewage treatment plant. It is convenient for collection and centralized processing.

The water flowing out of the drainage branch pipe 2 is separated by the interception well 1 and divided into initial rainwater and late rainwater. The interception well 1 has two outlets, which are the initial rainwater discharge port 4 and the late rainwater discharge port. The initial rainwater passes through the interception well 1. The initial rainwater discharge port 4 is directly discharged to the main sewage pipe 8 and enters the sewage treatment plant 9 for comprehensive treatment. The relatively clean rainwater in the later period is discharged into the online treatment pool 11 through the later rainwater outlet of the interception well 1 for online treatment, and the treated clean water is directly discharged into the natural water body 12 . The online treatment pool 11 simply treats the relatively clean rainwater in the later period, and does not generate waste water that flows back into the main sewage pipe 8. Therefore, the treatment pressure of the sewage treatment plant 9 is not increased, and the peak of the sewage treatment plant 9 is greatly relieved. The pressure of sewage treatment during the period.

The online treatment tank 11 of this embodiment is a group or a combination of several devices such as a cyclone, a grit chamber, a hydraulic particle separator, an aeration tank, and an ultraviolet disinfection tank. The rainwater pollution in the later period is relatively light, mainly some impurities such as sediment that are easy to settle, which can be removed by sedimentation and separation through some hydrocyclones or separators, which is simple and convenient.

One online processing pool 11 can be set in each area 10 in this embodiment, or one online processing pool 11 can be shared by multiple areas 10 .

During use, when it is sunny, the sewage is directly discharged into the sewage main pipe 8 through the initial rainwater outlet 4 on the interception well 1 and enters the sewage treatment plant 9, as shown in FIG. 5 .

In the early stage of rainfall, the amount of rainfall is not large at this time. After the initial rainwater is mixed with domestic sewage, it is discharged into the sewage main pipe 8 through the initial rainwater discharge port 4 on the interception well 1 and enters the sewage treatment plant 9 . After the initial rainwater discharge in the interception well 1 is basically completed, the interception device 4 begins to intercept, and the later stage rainwater begins to accumulate in the interception well 1. As shown in Figure 6, when the accumulated rainwater exceeds the height of the fixed weir 3, it begins to flow to the line. Discharge in the treatment pool 11.

When the water level between the rainwater discharge outlet of the interception well 1 and the fixed weir 3 is higher than the water level between the fixed weir 3 and the water inlet, the interception well 1 faces the risk of backflow, as shown in Figure 7. , the anti-backflow device 7 starts to work, and prevents water from pouring back into the interception well 1.

For the rainwater outfall of diversion system, the interception well 1 facility is built at the outlet of the drainage branch pipe 2, and the on-line treatment pool 11 is built at the outlet end of the interception well 1 to the natural water body 12, and the domestic sewage is intercepted to the sewage treatment plant 9 during sunny days. When it rains, the initial rain and domestic sewage are intercepted to the sewage treatment plant 9, and the later rainwater is discharged into the online treatment pool 11 for online treatment, and the treated rainwater is discharged to the natural water body 13 again.

For combined pipelines, if the water collection area is greater than 2 square kilometers, it is necessary to add several drainage outlets on the main junction pipe along the river. The water collection area responsible for each drainage outlet is about 1Km ² . Interception well 1 is arranged at the mouth of interception well 1, and on-line treatment pool 11 facilities are built at the outlet end of interception well 1 to natural water body 12, domestic sewage is intercepted to sewage treatment plant 9 when it is sunny, and initial rain and domestic sewage are intercepted to sewage treatment plant 9 during rainfall. Later rainwater is discharged into the online treatment pool 11 for online processing, and the treated rainwater is discharged into the natural water body 13 again.

The basic principles, main features and advantages of the present utility model have been shown and described above. Those skilled in the industry should understand that the utility model is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principle of the utility model. The utility model does not depart from the spirit and scope of the utility model There will also be various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model. The scope of protection required by the utility model is defined by the appended claims and their equivalents.

Claims (10)

1. A sliced cut-off on-line treatment discharge system, the water collection area of the system is provided with a main sewage pipe (8) and a branch drainage pipe (2); the branch drainage pipe (2) and the main sewage pipe (8) Connected, characterized in that: the water collection area is divided into a plurality of areas (10) according to the grid shape, and the area of each area (10) is 0.2 to 4 square kilometers; the area (10) is provided with At least one drainage branch pipe (2) and at least one interception well (1); the interception well (1) includes a water inlet, an initial rainwater outfall (4) and a later stage rainwater outfall, and the water inlet of the interception well (1) and The outlet end of the drainage branch pipe (2) is connected, the initial rainwater outlet (4) is connected with the sewage main pipe (8), the later rainwater outlet is connected with the online treatment pool (11), and the discharge end of the online treatment pool is connected with the natural water body (12 ) connected. 2 . The on-line treatment and discharge system for sliced interception according to claim 1 , characterized in that: the area of each slice ( 10 ) is 0.5 to 2 square kilometers. 3 . 3. The on-line treatment and discharge system of fragmentation interception as claimed in claim 1, characterized in that: an on-line treatment pool (11) or several sections (10) are provided in each section (10) An online processing pool (11) is used. 4. A kind of slice interception online treatment discharge system as claimed in claim 3, it is characterized in that: described online treatment tank (11) is cyclone, sedimentation tank, hydraulic particle separator, aeration tank, A group or a combination of several devices such as ultraviolet disinfection pools. 5. The on-line treatment and discharge system for sliced interception as claimed in claim 1, characterized in that: a fixed weir (3) is arranged in the interception well (1), and the initial rainwater discharge outlet (4) is arranged in the interception well (1). On the sidewall of the interception well (1) between the water inlet of the well (1) and the fixed weir (3), an initial rainwater discharge outlet (4) is provided with an interception device (5); the initial rainwater discharge outlet (4) A slag blocking device (6) is arranged between the fixed weir (3) and an anti-backflow device (7) is arranged in the interception well (1) between the fixed weir (3) and the later rainwater outfall. 6. The on-line treatment and discharge system for fragmentation interception as claimed in claim 5, characterized in that: the anti-backflow device (7) is arranged on the fixed weir (3); the anti-backflow device (7) It includes a guide rail (71) arranged on the side wall of the fixed weir (3); a door panel (72) is slidably connected to the guide rail; and a buoyancy tank (73) is connected to the door panel. 7. An on-line treatment and discharge system for fragmented interception as claimed in claim 5, characterized in that: the interception device (5) comprises a rotating plate (51) arranged on the side wall of the interception well (1); The middle part of the rotating plate (51) is hinged on the side of the initial rainwater discharge port (4); one end of the rotating plate (51) is provided with a floating ball (52), and the other end is connected to the initial rainwater discharge port (4). Cooperating opening and closing plate (53); the side wall of the intercepting well (1) located above the rotating plate (51) is provided with a first limit rod (55) and a second limit rod (56), when the opening and closing plate ( 53) When fully opened, the opening and closing plate (53) is in contact with the first limit rod (55), and when the opening and closing plate (53) completely covers the initial rainwater discharge port (4), the opening and closing The plate (53) is in contact with said second stop rod (56). 8. The on-line treatment and discharge system for sliced interception as claimed in claim 7, characterized in that: the height of the top of the fixed weir (3) is higher than that of the opening and closing plate (53) completely closing the initial rainwater discharge port (4) The height of the bottom of the floating ball (52) when covering. 9. An on-line treatment and discharge system for sliced interception as claimed in claim 5, characterized in that: the slag blocking device (6) is vertically fixed on the upper surface of the bottom of the interception well (1) and the interception well The side wall of (1) is a plate-shaped structure with an inclination angle, and the angle formed by the side wall of the slag blocking device (6) and the intercepting shaft (1) on which the intercepting device (5) is installed is an acute angle. 10. The on-line treatment and discharge system for sliced interception as claimed in claim 8, characterized in that: the slag blocking device (6) is a floating baffle or a hydraulic grill.