Pipe network discharge estuary pollutant degradation system

Abstract

The present application relates to a kind of pipe network estuary pollutant degradation systems, including first barrier screen, second barrier screen, third barrier screen, cofferdam is provided with beside third barrier screen, cofferdam is provided with outlet depth treatment unit, outlet depth treatment unit is by filler module and purification plant, the periphery of filler module is a water-permeable frame, the inside of filler module is equipped with bacterial porous medium filler and bacterial species, planting hole is provided in the upper layer of filler module, purification plant is planted in planting hole, the bottom of filler module is equipped with microporous aeration pipe, sewage purification device is provided in the last section pipe network. By intercepting, adsorbing, degrading, purifying before entering river channel to dry season sewage and initial rain pollution source, reduce the total amount of diffusion emission, reduce the purification burden of river channel, make up the deficiency of current pipe network estuary purification system;Meanwhile, the whole system structure is reasonable, manufacturing cost is lower, solve the difficulty of pipe network river channel overall management investment.

Description

TECHNICAL FIELD

[0001] The present application relates to the sewage treatment technical field, especially to a pipe network outlet river pollution degradation system. BACKGROUND

[0002] With the acceleration of urbanization and the improvement of industrialization, the degree of water pollution is increasing, and the pollution of urban river is more obvious as the direct discharge of surface runoff.

[0003] At present, river management is a major focus and problem of regional environmental management. The relevant departments have a series of policies and solutions, such as reducing agricultural non-point source pollution, separating rainwater and sewage, etc. The initial rain pollution in the rainwater pipe, human dumping, and illegal discharge and leakage cannot be solved in the short term, and the entrance of each rainwater pipe network into the river has become an important pollution source of the river. In recent years, CCTV and other pipe dredging detection technologies are used to conduct comprehensive inspection, repair and rainwater and sewage separation reconstruction of the pipe network. However, there are still some common problems:

[0004] 1. There are illegal discharge and leakage, in addition to the pipe network itself, and some human dumping, which has small water volume and high pollutant concentration, and is the main cause of rainwater pipe network sludge and oil floating.

[0005] 2. Non-point source pollution cannot be completely solved. Some restaurants and other businesses directly sprinkle water containing pollutants on the ground; there are garbage cans beside the road, and pollutants are spilled on the nearby ground. These pollutants will mix with rainwater and enter the rainwater pipe network, and the concentration of these pollutants is equivalent to that of domestic sewage.

[0006] 3. When there is oil pollution in the pipe, it is easy to attach to the rainwater pipe wall mixed with silt, form a large block, and be difficult to clean up, and will fall into the river during heavy rain.

[0007] Therefore, after the completion of sewage interception and pipe network, these problems of rainwater pipe network become an important source of river pollution.

[0008] In view of these problems, there are several solutions in the market at present:

[0009] Sewage interception and pumping. Set up a water collection well, and pump the sewage in the dry season to the sewage pipe, and directly discharge into the river in the rainy season. The disadvantage of this method is that some places do not have the conditions for pumping and sewage interception.

[0010] In the outlet, an in-situ pollutant treatment device is arranged in the river. A sewage interception fence is arranged at the outlet, and then a part of filler is arranged to remove part of the pollutants by adsorption. The effect of this method is poor, the residence time of sewage in the filler cannot meet the necessary time required for removing pollutants, and the performance of the bacterial filler has not been tested for a long time, and the root problem has not been solved.

[0011] At the outlet, a bypass pollutant treatment device is arranged outside the river channel. The effluent quality of this treatment device is good, but there are two shortcomings: (1) the site selection is difficult, and it is required that there is a space on the bank and the power supply is convenient; (2) the equipment volume for effective removal is large, and the cost is high.

[0012] River channel back-end treatment. This method has poor effect and high investment cost, which is a common phenomenon that many river channel operation units want to do but cannot do due to lack of strength.

[0013] The applicant found problems in river maintenance, combined with the general situation of pipeline inspection, and developed a pipe network river outlet pollutant degradation system to solve the technical problems: the system can make up for the shortcomings of the current pipe network river outlet purification system, and solve the difficulty of large investment in overall management of pipe network river channel. By intercepting, adsorbing, degrading, purifying the pollution sources of dry season sewage and initial rain before entering the river channel, reducing the total amount of diffusion discharge and reducing the purification burden of the river channel. At the same time, the technology module can be embedded into the current intelligent outlet, reducing the water quantity transported to the sewage plant and reducing the pressure of the back-end sewage plant, and improving the living environment of the surrounding residents. SUMMARY

[0014] The purpose of the present application is to provide a pipe network river outlet pollutant degradation system to solve the problems in the background art.

[0015] To solve the above technical problems, the present application is realized by the following technical measures: a pipe network river outlet pollutant degradation system, comprising:

[0016] The first pollution screen is located at the rainwater outlet and is arranged at the bottom of the rainwater outlet.

[0017] The second pollution screen is located in the last inspection well and is arranged at the bottom of the last inspection well.

[0018] The third pollution screen is located at the river outlet, and the middle part of the third pollution screen is arranged at the normal water level line or the enhanced treatment water level line.

[0019] A last-stage pipe network is arranged between the last-stage inspection well and the river outlet, and a sewage purification device is arranged in the last-stage pipe network. The sewage purification device comprises an aeration pipeline, and an adsorption interception carrier is fixed on the aeration pipeline. The top of the adsorption interception carrier is provided with a suspended ball.

[0020] The cofferdam is arranged beside the third barrier screen, and a discharge outlet deep treatment unit is arranged in the cofferdam, the discharge outlet deep treatment unit is composed of a filler module and purification plants, the filler module is surrounded by a water permeable frame, the filler module is internally provided with bacteria-carrying porous medium filler and bacterial strains, planting holes are arranged on the upper layer of the filler module, the purification plants are planted in the planting holes, and a microporous aeration pipe is arranged at the bottom of the filler module.

[0021] Compared with the prior art, the advantages of the present application are that the sewage in dry season and the pollution source in initial rain are intercepted, adsorbed, degraded and purified before entering the river, so that the total amount of diffusion discharge is reduced, the purification burden of the river is reduced, and the deficiency of the current pipe network discharge river mouth purification system is made up; meanwhile, the whole system structure is reasonable, the manufacturing cost is low, and the difficulty of large investment in pipe network river overall treatment is solved.

[0022] As an improvement of the present application, the adsorption interception carrier is modified carbon fiber special filler. The purpose of selecting this design is that the adsorption interception carrier uses modified carbon fiber special filler because it has high porosity, strong adsorption capacity and light quality. In addition, other fillers such as graphite carbon fiber sheet filler, soft fiber carrier and the like also have large surface area, high porosity, small density and strong adsorption capacity, and can also be selected.

[0023] As an improvement of the present application, the bacteria-carrying porous medium filler is modified polyurethane and volcanic rock filler. The purpose of selecting this design is that the volcanic rock filler has low cost, good permeability, large specific surface area and is beneficial to the fixation and biofilm formation of microorganisms. The polyurethane filler is a porous network filler, and the internal porous and staggered mesh structure can provide an attachment growth carrier for microorganisms. After hydrophilic modification, it is more beneficial to the attachment of dominant aerobic bacteria. Unlike the general use method, the hydrophilic polyurethane filler is arranged in the filler module, and the fixed bed can better intercept, adsorb, fix and degrade pollutants, and has the characteristics of large specific surface area, low dosage, fast biofilm formation speed and long service life.

[0024] As an improvement of the present application, the purification plants are emergent plants or floating leaf plants. The purpose of selecting this design is that the emergent plants or floating leaf plants absorb and accumulate nutrients such as organic matter, nitrogen and phosphorus in the bacteria-carrying porous medium filler during the growth process, auxiliary remove pollutants, beautify the discharge outlet environment, remove odor and are more natural and ecological.

[0025] As an improvement of the present application, the frame of each barrier screen is composed of steel wire mesh + angle iron, the top, side and bottom surfaces all adopt steel wire mesh, and the corners are reinforced by angle iron. The purpose of selecting this design is that the structure is simple and the manufacturing cost is low.

[0026] As an improvement of the present application, an adsorbing oil separation wrapping bag is arranged in the middle of each oil blocking screen, which is filled with sawdust shavings, modified fiber, other high porosity oil-wet hydrophobic particles or fibrous material, and wrapped with two layers of 10-20mm thick biochemical filter cotton.

[0027] As an improvement of the present application, the aeration pipeline and the microporous aeration pipe are powered by an oxygenation aeration fan, which is powered by a solar device. The purpose of selecting this design is that the aeration pipeline can increase the dissolved oxygen content in the water body by injecting air or pure oxygen into the water, and the dissolved oxygen is one of the key factors for the survival of aquatic organisms and the decomposition of organic matter, and the dissolved oxygen content can improve the self-purification ability and ecological environment of the water body. The oxygenation aeration fan can further improve the dissolved oxygen, and the microporous aeration pipe has high oxygen transfer rate and is more energy-saving. The solar device can be used without considering the site without city power.

[0028] As an improvement of the present application, a water pumping pump is arranged in the terminal inspection well, which is used to connect a mobile circulating purification machine. The purpose of selecting this design is that when more oil pollution needs to be intercepted, a set of mobile circulating purification machine is added for treatment, and the floating oil and suspended impurities are adsorbed, purified, recovered or disposed, and the treated water is discharged to the downstream side of the second oil blocking screen through the circulating water outlet pipeline. The mobile circulating purification machine is vehicle-mounted, and the interface is a quick interface, which is convenient and fast, and can be used for maintenance at ordinary times and in emergency accidents. The circulating water inlet pipeline and the circulating water outlet pipeline are both flexible pipes, which are convenient to carry and quickly connect. BRIEF DESCRIPTION OF DRAWINGS

[0029] The accompanying drawings, which form a part of the present application, are used to provide a further understanding of the present application, and the schematic embodiments of the present application and their descriptions are used to explain the present application, and do not constitute an improper limitation on the present application.

[0030] In the drawings:

[0031] Figure 1 It is a top view of the pipe network river mouth pollutant degradation system described in the present application.

[0032] Figure 2 It is a sewage purification schematic diagram in the terminal pipe network described in the present application.

[0033] Figure 3 It is a front view and a top view of the oil blocking screen body described in the present application.

[0034] Figure 4 It is a front view and a top view of the oil blocking screen body and the riverbed during installation.

[0035] Figure 5 The elevation view of the gutter outlet advanced treatment unit according to the present application.

[0036] Figure 6 The elevation view of the carrier bacteria porous medium filler frame according to the present application.

[0037] Figure 7 The elevation view of the third pollution barrier according to the present application.

[0038] Figure 8 The plan view of the third pollution barrier according to the present application.

[0039] Figure 9 The third party detection report table according to the present application.

[0040] BRIEF DESCRIPTION OF DRAWINGS: 1, gutter; 2, first pollution barrier; 3, upstream rainwater trunk; 4, final inspection well; 5, second pollution barrier; 6, final pipe network; 7, aeration pipeline; 8, adsorption interception carrier; 9, third pollution barrier; 10, gutter outlet advanced treatment unit; 11, filler module; 12, carrier bacteria porous medium filler; 13, microporous aeration pipe; 14, purification plant; 15, discharge weir; 16, water pump; 17, mobile circulating purification machine; 18, circulating water inlet pipeline; 19, circulating water outlet pipeline; 20, oxygenation aeration fan; 21, regulating valve; 22, solar device; 23, fixed rod; 24, counterweight; 25, suspended ball; 26, vertical guide rod; 27, bolt; 28, sealing sheet; 29, cofferdam; 30, water permeable frame; 31, planting hole; 32, pipe network inflow; 33, air trunk; 34, pollution barrier frame; 35, top cover wire mesh; 36, side wire mesh; 37, top cover lock; 38, side angle iron; 39, adsorption oil separation wrapping bag; 40, biochemical filter cotton; 41, fixed lock; 42, fixed angle iron; 43, expansion screw; 44, gutter or well wall; 45, top cover angle iron; 46, hard river bank; 47, normal water level line; 48, enhanced treatment water level line; 50, riverbed. DETAILED DESCRIPTION

[0041] The preferred embodiments of the present application will be described below in conjunction with the accompanying drawings, and it should be understood that the preferred embodiments described herein are only used to explain and illustrate the present application, and are not used to limit the present application.

[0042] Example 1

[0043] Please refer to Figure 1 -8, the pipe network gutter outlet pollutant degradation system provided by the present application, wherein, it comprises:

[0044] The first pollution barrier 2 is located at the gutter 1 and is arranged at the bottom of the gutter 1.

[0045] The second trash screen 5 is located in the terminal inspection well 4 and is arranged at the bottom of the terminal inspection well 4.

[0046] The third trash screen 9 is located at the river mouth, and the middle part of the third trash screen 9 is arranged at the normal water level line 47 or the intensified treatment water level line 48.

[0047] In the embodiment of the present application, please refer to Figure 3 With Figure 4 The first trash screen 2, the second trash screen 5 and the third trash screen 9 are consistent in function and structure, and mainly perform multi-stage adsorption interception and filtration on floating objects, animal and plant oils, mechanical oils and high-molecular organic matters in the incoming water 32 of the pipe network.

[0048] The trash screen frame 34 is made of steel wire mesh + angle iron, the top, side and bottom are all made of steel wire mesh, and the edges and corners are reinforced by angle iron. The top cover steel wire mesh 35 has a pore diameter of 0.5-1mm, and the side steel wire mesh 36 has a pore diameter of 20-50mm. The top cover lock 37 is arranged at the middle of the top of the trash screen frame 34, and is locked on the side angle iron 38 with a spacing of 300-500mm. When locked, the filler can be compressed, and when opened, the internal filling adsorption oil separation wrapping bag 39 can be taken out.

[0049] The thickness of the trash screen frame 34 is 100-150mm, and the length is determined according to the width of the placed position. In the height direction, the first trash screen 2 is arranged at the bottom of the rainwater inlet 1, the second trash screen 5 is arranged at the bottom of the terminal inspection well 4, and the total height of the third trash screen 9 is 400-600mm. The top of the trash screen is 200-250mm higher than the height of the normal water level line 47 or the intensified treatment water level line 48, and the bottom is 200-350mm lower than the height of the normal water level line 47 or the intensified treatment water level line 48, which is beneficial to the water passing through the bottom and intercepting the surface pollutants of the water body.

[0050] The inside of the trash screen frame 34 is wrapped with two layers of 10-20mm-thick biological filter cotton 40 to fill sawdust shavings, modified fibers, other high-porosity oil-wet hydrophobic particles or fibrous materials. The wrapping is made into a cylindrical strip shape with a diameter of 100-150mm, and one strip is inserted and filled into the frame. Because the cylindrical strip shape has the characteristics of compressibility and shape change, the frame can be filled and compacted, and when the top cover lock 37 of the top cover is locked, it can be compressed by the top cover.

[0051] The fixing mode of the screen frame 34: the fixing buckles 41 are arranged at both ends of the top cover, when the screen frame 34 is placed in position and the gap is filled and compacted with the biochemical filter cotton 40, the whole screen frame 34 is fixed on the fixed angle iron 42 vertically arranged on the pool wall by the fixing buckles 41, the fixed angle iron 42 is fixed on the rainwater pipe wall or well wall 44 by the expansion screws 43, when placed, the screen frame 34 is placed vertically downwards along the middle position of the fixed angle iron 42. After being placed in position, the gap between the screen frame 34 and the rainwater pipe wall or well wall 44 is filled and compacted with the biochemical filter cotton 40.

[0052] When the adsorption oil separation wrapping bag 39 in the screen frame 34 needs to be replaced, the fixing buckles 41 are opened, then the top cover angle iron 45 of the screen frame 34 is hung out by a hook, after that, the top cover buckles 37 are opened, the top cover wire mesh 35 is taken out, then the adsorption oil separation wrapping bag 39 is taken out and replaced one by one.

[0053] The third screen 9 is arranged in the same way as the first screen 2 and the second screen 5 (the size is different), the first screen 2 and the second screen 5 are generally arranged at the bottom, but can also be increased according to the actual situation, and the lifting device can be used to realize the lifting or lowering. The lifting device is a conventional technology, the whole screen is driven by a screw, and the function can be realized by manual rotation or automatic control of a motor, which will not be repeated here.

[0054] The third screen 9 is arranged with a vertical guide rod 26 which can adjust the height, please refer to Figure 7 And Figure 8 The third screen 9 is arranged at the pipe and river channel outlet, is fixed on the vertical guide rod 26 by the bolt 27 and can be adjusted and moved up and down, the vertical guide rod 26 is fixed on the hard river bank 46 by the expansion screws 43. The vertical guide rod 26 plays the role of the lifting device and can realize the lifting or lowering. The motor can also be used to automatically control the lifting action, and the liquid level meter is arranged in the last pipe network 6, the lifting of the third screen 9 is automatically controlled according to the liquid level, so that the middle part of the third screen 9 is kept at the normal water level line 47. The lifting device, the liquid level meter and the automatic control of the lifting are all conventional technologies, which will not be repeated here.

[0055] The gap between the third screen 9 and the pipe wall is filled with the sealing piece 28 to prevent oil and the like from flowing out of the gap and affecting the treatment effect. The sealing piece 28 can be made of biochemical filter cotton 40 or soft rubber.

[0056] The sewage purification device is arranged in the end section pipe network 6, and the sewage purification device comprises an aeration pipeline 7, and an adsorption and interception carrier 8 is fixed on the aeration pipeline 7, and a suspension ball 25 is arranged on the top of the adsorption and interception carrier 8. The suspension ball 25 is a commercially available product, which has good buoyancy, can adsorb and separate pollutants, prevent the deposition of solid particles and gas, enhance oxidation capacity and reduce energy consumption, promote the degradation of harmful substances, and thus improve water quality. The aeration pipeline 7 in the end section pipe network 6 and the carrier support and the microporous aeration pipe 13 in the depth treatment unit 10 are jointly supplied with air by an oxygenation aeration fan 20, and the air volume is distributed by adjusting valves 21, and the adjusting valves 21 are separately arranged on each branch pipe. The oxygenation aeration fan 20 can be directly connected to electricity or powered by a solar device 22.

[0057] The aeration pipeline 7 and the carrier support are fixed at the pipe ends by the U-shaped clamps through the fixing rods 23 to prevent movement, and 1-2 counterweights 24 are arranged at the middle positions of the aeration pipeline 7 and the carrier support to prevent the pipeline from floating up during aeration. The lower part of the adsorption and interception carrier 8 is fixed on the aeration pipeline 7 and the carrier support by binding a strap, and the upper part can freely float or be vertically suspended in water by connecting the suspension ball. The suspension ball 25 is a commercially available product, which has good buoyancy, can adsorb and separate pollutants, prevent the deposition of solid particles and gas, enhance oxidation capacity and reduce energy consumption, promote the degradation of harmful substances, and thus improve water quality.

[0058] The aeration pipeline 7 and the carrier support can be a perforated pipe or a microporous aeration pipe 13, which can be selected according to the content of pollutants in water and the level of oxygen transfer efficiency; the height of the adsorption and interception carrier 8 is not more than 1 / 3 of the inner diameter of the pipeline, and is preferably located below the normal water level line 47 by about 200 mm to ensure its effective utilization rate; the aeration pipeline 7, the carrier support and the adsorption and interception carrier 8 are arranged in two to three rows side by side. The adsorption and interception carrier 8 adopts a modified carbon fiber special filler with high porosity or other carriers (such as graphite carbon fiber sheet filler) with strong adsorption capacity and light quality, which has the advantages of large specific surface area, high porosity, small density and high strength, or a soft fiber carrier.

[0059] The setting mode has the advantages that the oxygen in the pipe section agitates the water body at the same time, there is no problem of pipeline deposition, the costs of dredging and detection and pipeline maintenance are saved, and the impact of the silt washed up at the bottom on the water quality of the downstream river during rain is reduced.

[0060] The cofferdam 29 is connected and sealed with the riverbed 50, and the cofferdam 29 is internally provided with the outlet deep treatment unit 10, which is composed of the filler module 11 and the purification plant 14, the filler module 11 is externally provided with a water-permeable frame 30, the filler module 11 is internally provided with the carrier-borne porous medium filler 12 and the bacterial strain, and the upper layer of the filler module 11 is provided with the planting hole 31, the planting filler module 11 is independently designed, and is integrated with the microporous aeration pipe 13, the water-permeable frame 30 and the planting hole 31. The filler modules 11 are staggered and placed in the outlet deep treatment unit 10, so as to avoid short flow and ensure smooth drainage. The top is lower than the normal water level line 4750-100 mm; the carrier-borne porous medium filler 12 can be polyurethane, volcanic rock, microporous filler and the like. The volcanic rock filler is low in cost, good in permeability, large in specific surface area and beneficial to the fixation and biofilm formation of microorganisms. The polyurethane filler is a porous reticular filler, and the internal porous staggered mesh structure can provide an attachment growth carrier for microorganisms, and after hydrophilic modification, it is more beneficial to the attachment of dominant aerobic bacteria. Unlike the general use method, the hydrophilic polyurethane filler is arranged in the filler module, and the fixed bed can better intercept, adsorb, fix and degrade pollutants, and has the characteristics of large specific surface area, low addition ratio, fast biofilm formation speed and long service life. In addition, graphite carbon fiber sheet fillers, soft fiber carriers and the like, which also have the characteristics of large surface area, high porosity, small density and strong adsorption capacity, can also be selected.

[0061] The high-efficiency aerobic bacteria are different from the microbial flora in the activated sludge method, and after domestication and bacterial loading are completed, the sludge proliferation rate is low, and a large amount of detached biofilm will not be caused. They must be attached in the porous medium for application. The porous filler not only provides a habitat for the growth of microorganisms, but also creates an aerobic-anoxic microenvironment in the aerobic reaction tank, and provides reaction conditions for in-situ nitrification-denitrification of nitrogen-containing organic matter. Organic matter, ammonia nitrogen and phosphorus in the incoming water are preferentially adhered by the filler, microbial secretions and the like, and then are decomposed and absorbed by microorganisms.

[0062] The bacterial strain can be aerobic bacteria such as Aspergillus and yeast, or nitrifying bacteria such as nitrite bacteria and nitrate bacteria, and the preferred bacterial strain is a mixed bacteria of high-efficiency aerobic bacteria and high-efficiency nitrifying bacteria. The mixed bacteria takes organic matter and ammonia nitrogen as nutrients, decomposes the organic matter into carbon dioxide and water, and oxidizes the ammonia nitrogen into nitric nitrogen. At the same time, the bacterial proliferation rate is slow, that is, after domestication and bacterial loading are completed, the new cell production per unit nutrient is relatively low. Unlike the general activated sludge and contact oxidation method, there is no dead sludge or the need for regular sludge discharge in the interior.

[0063] The surface of the carrier bacteria porous medium filler 12 needs to be treated with hydrophilic to improve the efficiency of the bacteria loading. The carrier bacteria porous medium filler 12 is installed in the water permeable frame 30 in a fixed bed mode, which has higher treatment efficiency and is convenient for quick installation and maintenance. The water permeable frame 30 is provided with a microporous aeration pipe 13 and a regulating valve 21 at the bottom. By adjusting the opening size of the regulating valve 21, an aerobic condition is formed on the surface of the filler, and an anoxic condition is formed inside the filler, which is beneficial to create in-situ nitrification-denitrification reaction conditions. The regulating valve 21 is connected with the oxygenation aeration fan 20 through the air main pipe 33.

[0064] A planting hole 31 is designed at the top of the filler module 11 for planting purification plants 14. The purification plants 14 can be emergent plants (i.e. the roots and rhizomes of the plants grow in the bottom mud of water, and the stems and leaves grow out of the water surface; reed, cattail, wild rice, lotus, water celery, wild rice, lotus, water celery, etc.) or floating leaf plants (floating leaf plants grow in shallow water, roots grow in the soil at the bottom of the water, only stomata on the outer surface of the leaves, and the transpiration of the leaves is very large, such as lotus, water snake, and water celery). In the growth process, the plants absorb nutrients such as organic matter, nitrogen, and phosphorus accumulated in the carrier bacteria porous medium filler 12, which helps to remove pollutants, beautifies the environment of the outlet, removes odors, and is more natural and ecological.

[0065] In the embodiment of the present application, the aeration pipe 7 and the microporous aeration pipe 13 are powered by the oxygenation aeration fan 20, and the oxygenation aeration fan 20 is powered by the solar device 22. The aeration pipe 7 increases the dissolved oxygen content in the water body by injecting air or pure oxygen into the water, and the dissolved oxygen is one of the key factors for the survival of aquatic organisms and the decomposition of organic matter. The dissolved oxygen content can improve the self-purification ability and ecological environment of the water body. The oxygenation aeration fan 20 can further increase the dissolved oxygen, and the microporous aeration pipe 13 has high oxygen transfer rate. The solar device 22 can be used without considering the site without city power.

[0066] In the embodiment of the present application, a water pumping device 16 is arranged in the terminal inspection well 4, and the water pumping device 16 is used to connect a mobile circulating purification machine 17. When more oil stains are intercepted on the upstream side of the second pollution interception screen 5, the water pumping device 16 is used to lift water through a circulating water inlet pipe 18 to the mobile circulating purification machine 17 for treatment in the dry season, and the floating oil and suspended impurities are adsorbed, purified, recovered or disposed, and the treated water is discharged through a circulating water outlet pipe 19 to the downstream side of the second pollution interception screen 5. The mobile circulating purification machine 17 is vehicle-mounted, and the interface is a quick interface, which is convenient and fast, and can be used for maintenance at ordinary times and in emergency accidents. The circulating water inlet pipe 18 and the circulating water outlet pipe 19 are both hoses, which are convenient to carry and quickly connect. The treatment can avoid the instantaneous impact of heavy rainfall, and the intercepted pollutants are not washed into the downstream pipe network and river again. The mobile circulating purification machine 17 can integrate functions such as belt oil removal, oil absorption cotton oil absorption and filter material filtration, and has the advantages of small size, mobility and high efficiency.

[0067] The discharge weir 15 is arranged on the inner side of the pipe network discharge river mouth cofferdam 29, so as to fully utilize the effective volume of the existing pipe network part pipe section and the discharge river mouth. The discharge weir 15 can be lifted and adjusted, and can select the normal water level line 47 or the enhanced treatment water level line 48 for treatment according to the pollution degree of incoming water or the size of water volume, so as to realize the extension of residence time in the dry season and play the purification function; in the rainy season, the discharge of flood water is not affected, and at the same time, the discharge of flood water also has the overflow function. The adjustment height is coordinated with the rainfall, pollution characteristics and regional characteristics, and the potential function is maximized.

[0068] The system uses high-quality bacterial flora and advanced process design, and the effect is obvious on the second day after the construction is completed. The water quality is clear and transparent, the turbidity is ≤5 NTU, the permanganate index and ammonia nitrogen are stable and better than the III class water quality standard in the "Surface Water Environmental Quality Standard" (GB3838-2002), and part of the time can be better than the II class water quality standard. It is equivalent to changing the original pollution source of the river into a high-quality supplementary water source of the river.

[0069] The system can be combined with the embedded existing intelligent discharge port, and is not limited to monitoring, early warning and interception of sewage discharge, but also improves the in-situ purification rate, reduces the number of early warnings, reduces the sewage discharge of the pipe network, saves energy consumption and reduces the pressure of the sewage pipe network.

[0070] This embodiment provides a pollutant degradation system for a pipeline network at a river outlet. During normal use, rainwater mixed with pollutants is discharged into the rainwater inlet 1 via surface runoff. It is initially intercepted by a first-stage debris barrier 2 installed within the rainwater inlet 1, which adsorbs and retains suspended solids, oil, and other pollutants mixed in the water. The water then enters the upstream rainwater main pipe 3, mixes with water from other sources along the main pipe, and flows downstream through the terminal inspection well 4. A second-stage debris barrier 5 is installed in the terminal inspection well 4, primarily adsorbing and intercepting floating impurities such as oil from the main pipeline network. The water passing through the second-stage debris barrier 5 enters the terminal pipeline network 6 for preliminary adsorption and purification. The terminal pipeline network 6 is equipped with an aeration pipe 7 and carrier supports and adsorption / retention carriers 8. After preliminary adsorption and purification in the terminal pipeline network 6, the water passes through a third-stage debris barrier 9 before entering the outlet deep treatment unit 10. The third-stage debris barrier 9 is fixed to the pipe wall with angle iron and can be adjusted vertically. Within the treatment system between the terminal pipeline 6 and the third debris barrier 9, the adsorption of organic matter, the aeration and flotation of pipeline sludge, and the adsorption and retention of oil are achieved. Most suspended organic matter is retained in this stage, while inorganic and dissolved organic matter that cannot be adsorbed enters the discharge deep treatment unit 10 with the water flow. In the discharge deep treatment unit 10, packing modules 11 containing porous media packing materials 12 loaded with highly efficient aerobic bacteria are placed alternately. Through oxygenation via microporous aeration pipes 13, degradation by bacteria on the porous media packing materials 12, and absorption by purifying plants 14, the water quality is purified through the synergistic effect of physical, chemical, and biological processes. Finally, the water is discharged into the river through the discharge weir 15.

[0071] This embodiment provides a pollutant degradation system for a pipeline network discharging into a river estuary, which has the following advantages:

[0072] 1. This system integrates new energy technology, mobile treatment technology, multi-stage interception and absorption and ecological treatment technology to solve the problems of rainwater and sewage pipe network, initial rain, pipe sedimentation and point source pollution from a systemic perspective. It integrates energy conservation, environmental protection, river management and landscape, and achieves zero direct discharge of rainwater and sewage from the pipe network.

[0073] 2. This system makes full use of the water storage capacity of the existing pipe network and performs in-situ ecological treatment under controllable conditions, maximizing the potential functions of the pipe network and outlets.

[0074] 3. The use of multi-stage interception, adsorption, biochemical, plant-assisted purification of nutrients such as organic matter, nitrogen, phosphorus, etc. gathered in the filler frame, greatly improving water quality, beautifying the discharge port environment, and being more natural and ecological. The high-quality bacterial flora and advanced process design of the system ensure that the effluent is clear and transparent, with an effluent discharge port turbidity of ≤5 NTU, permanganate index and ammonia nitrogen stable and superior to the Class III water quality standard in the Surface Water Environmental Quality Standard (GB3838-2002), and some periods can be superior to the Class II water quality standard. It is equivalent to changing the original pollution source of the river channel into a high-quality supplementary water source for the river channel.

[0075] 4. The purification system can be combined with the existing intelligent discharge port, not only limited to monitoring, early warning and interception of sewage discharge, but also improving the in-situ purification rate, reducing the number of early warnings, reducing the amount of sewage discharged by the pipe network, saving energy consumption and reducing the pressure on the sewage pipe network.

[0076] 5. Clean energy

[0077] The system only needs to consume energy for oxygenation and aeration, and the required power is small, which can be electric energy or solar energy, etc. clean energy, suitable for a wide range of areas.

[0078] Please refer to Figure 9 , the applicant entrusts a third-party authoritative testing agency to test the upstream rainwater well (equivalent to the sewage before treatment in the application), the rainwater discharge port (the last one before the river channel, equivalent to the purified water after treatment in the application). River water from three water samples can be analyzed to show that the turbidity, permanganate index, and petroleum in the sewage are significantly reduced after treatment, and are cleaner than river water.

[0079] The beneficial effects of the present application are: by intercepting, adsorbing, degrading, and purifying the sewage in the dry season and the initial rain pollution source before entering the river channel, reducing the total amount of diffusion discharge and reducing the purification burden of the river channel. At the same time, the technology module can be embedded in the current intelligent discharge port to reduce the amount of water transported to the sewage plant and reduce the pressure on the downstream sewage plant, improving the living environment of the surrounding residents.

[0080] In the description of the present application, it should be noted that the terms "vertical", "upper", "lower", "horizontal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the present application.

[0081] In the description of the application, it also needs to be explained that, unless otherwise explicitly specified and limited, the terms "set", "install", "connect", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0082] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for the limitation of the present application, although the foregoing embodiments of the present application are described in detail, for those skilled in the art, the technical solution recorded in the foregoing embodiments can be modified, or some technical features can be replaced. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A pollutant degradation system for river estuaries via a pipeline network, characterized by: include: The first debris barrier (2) is located at the rainwater inlet (1) and is set at the bottom of the rainwater inlet (1); The second debris barrier (5) is located inside the last inspection well (4) and is set at the bottom of the last inspection well (4); The third debris barrier (9) is located at the river mouth, and the middle part of the third debris barrier (9) is set at the normal water level (47) or the enhanced treatment water level (48). A terminal pipe network (6) is provided between the terminal inspection well (4) and the river mouth. A sewage purification device is provided in the terminal pipe network (6). The sewage purification device includes an aeration pipe (7). Several sets of adsorption and interception carriers (8) are fixed on the aeration pipe (7). A suspended ball (25) is provided on the top of the adsorption and interception carrier (8). A dike (29) is set up next to the third barrier screen (9). A discharge outlet deep treatment unit (10) is set up inside the dike (29). The discharge outlet deep treatment unit (10) is composed of a packing module (11) and a purification plant (14). The packing module (11) is surrounded by a permeable frame (30). The packing module (11) is equipped with a bacteria-carrying porous media packing (12) and bacteria inside. A planting hole (31) is set up on the upper layer of the packing module (11). The purification plant (14) is planted in the planting hole (31). A microporous aeration pipe (13) is set up at the bottom of the packing module (11). Each screen frame is made of wire mesh and angle iron. The top, sides and bottom are made of wire mesh and the corners are reinforced with angle iron. Each screen is equipped with an oil-absorbing and separating bag (39) in the middle. The oil-absorbing and separating bag (39) consists of two layers of 10-20mm thick biochemical filter cotton (40), and is filled with sawdust, modified fiber, other highly porous oleophilic and hydrophobic particles or fibrous materials in the middle.

2. The pollutant degradation system for river outlets via pipelines according to claim 1, characterized in that: The adsorption and retention carrier (8) is a modified carbon fiber special filler.

3. The pollutant degradation system for river outlets via pipelines according to claim 1, characterized in that: The bacterial-carrying porous media packing (12) is a modified polyurethane or volcanic rock packing.

4. The pollutant degradation system for river outlets via pipelines according to claim 1, characterized in that: The purification plant (14) is an emergent plant or a floating-leaved plant.

5. The pollutant degradation system for river outlets via pipelines according to claim 1, characterized in that: The aeration pipe (7) and the microporous aeration pipe (13) are powered by an oxygenation aeration blower (20), which is powered by a solar energy device (22).

6. The pollutant degradation system for river estuaries via pipeline network according to claim 1, characterized in that: in A water pump (16) is installed in the end inspection well (4), and the water pump (16) is used to connect to the mobile circulating purification machine (17).

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