Device for water quality purification and advanced treatment of natural water body

Abstract

The invention belongs to the technical field of water environment treatment and water ecological restoration, and discloses a natural water body water quality purification and advanced treatment device which comprises a reaction treatment tank; the contact sedimentation tank, the denitrification tank, the deep purification tank and the filtering tank are sequentially arranged in the reaction treatment tank side by side and are sequentially connected; each of the contact sedimentation tank, the denitrification tank, the deep purification tank and the filter tank comprises a cutoff wall and a water passing wall. According to the method, multi-stage lifting equipment and backflow equipment are not needed, so that the equipment investment is reduced, and the cost is saved; and the multi-stage lifting equipment and the backflow equipment do not need to be arranged on an additional site, so that the occupied area required for installing the equipment is greatly reduced, and the construction cost and the operation cost are greatly saved. Meanwhile, the device is completely buried underground and fused with surrounding landscapes, secondary pollution such as noise and odor is avoided, the ground above the device can be used for other purposes, and the utilization rate of the land is increased.

Description

Technical Field

[0001] The invention belongs to the technical field of water environment management and water ecological restoration, and in particular relates to a device for purifying and deeply treating water quality of natural water bodies. Background Art

[0002] Traditional water treatment methods have many limitations when dealing with these complex pollutants, and it is difficult to meet the increasingly stringent water quality standards, governance requirements, and people's urgent needs for high-quality water environment maintenance and water ecological restoration. Therefore, it is particularly important to develop efficient, economical, environmentally friendly and beautiful natural water purification and deep treatment equipment.

[0003] At present, natural water purification technologies mainly include ecological engineering technology and physical and chemical technology. Ecological engineering technology purifies water bodies through the synergistic effect of plants, animals and microorganisms, using the absorption and adsorption of aquatic plants and the decomposition of microorganisms. For example, ecological floating bed technology effectively reduces the content of nitrogen, phosphorus and organic matter in eutrophic water bodies by planting aquatic plants on the surface of water bodies. Artificial wetland technology simulates the structure and function of natural wetlands, and achieves water purification through the ecological chain composed of microbial filler areas and aquatic plants and animals. These ecological engineering technologies have the advantages of significant treatment effects and relatively low engineering costs, but their purification efficiency is easily affected by seasonal and water temperature changes, and physical and chemical methods need to be used to solve the problem of sudden black and smelly or algae growth.

[0004] Physical and chemical technologies include aeration, filtration, adsorption, membrane separation, and advanced oxidation processes. For example, aeration and oxygenation technology increases the dissolved oxygen content in the water by filling air into the water body, promoting the growth and metabolism of microorganisms, thereby accelerating the degradation of pollutants. Membrane separation technology uses the selective screening effect of the membrane to intercept pollutants in the water and achieve deep purification of the water quality. Advanced oxidation processes such as photocatalysis and electrochemical oxidation can effectively remove difficult-to-degrade organic matter in the water. These physical and chemical technologies have the advantages of high efficiency and strong controllability, but are usually accompanied by high energy consumption and cost.

[0005] Although existing water purification technologies can improve the water quality of natural water bodies to a certain extent, there are still some problems and challenges. For example, the purification efficiency of ecological engineering technology is not stable enough and is easily affected by environmental factors; physical and chemical technologies produce secondary pollution and have high operating costs.

[0006] Therefore, there is an urgent need to develop a natural water purification and deep treatment device that integrates multiple technical advantages to achieve the goal of efficient, stable, economical and beautiful water purification.

[0007] Through the above analysis, the problems and defects of the prior art are as follows:

[0008] Traditional water treatment methods have many limitations when dealing with these complex pollutants, and it is difficult to meet increasingly stringent water quality standards, governance requirements, and people's urgent needs for high-quality water environment maintenance and water ecological restoration. Summary of the invention

[0009] In view of the problems existing in the prior art, the present invention provides a device for purifying and deeply treating the water quality of a natural water body.

[0010] The present invention is achieved in that a device for purifying and deeply treating natural water comprises:

[0011] A reaction treatment tank; and a contact sedimentation tank, a denitrification tank, a deep purification tank and a filtration tank which are arranged side by side in the reaction treatment tank and connected in sequence; the contact sedimentation tank, the denitrification tank, the deep purification tank and the filtration tank each include a water-blocking wall and a water-passing wall, wherein a water inlet gap is provided at the bottom end of the water-blocking wall, a water-passing gap is provided at the top end of the water-passing wall, and the height of the water-passing wall decreases in sequence from the contact sedimentation tank to the filtration tank.

[0012] Furthermore, the reaction treatment tank includes a top wall opposite to the bottom wall, the top end of the water-blocking wall is connected to the top wall, the bottom end of the water-passing wall is connected to the bottom wall and is spaced from the bottom wall to form a corresponding water inlet gap; the top end of the water-passing wall is spaced from the top wall to form a corresponding water-passing gap.

[0013] Furthermore, the reaction treatment tank includes a first end wall and a second end wall respectively connecting the opposite ends of the top wall and the bottom wall, the first end wall and the second end wall are respectively located at the two ends of the reaction treatment tank along the length direction, and the contact sedimentation tank, the denitrification tank, the deep purification tank and the filtration tank are sequentially connected and installed in the reaction treatment tank along the length direction from the first end wall to the second end wall; a water storage area is provided between the outermost contact sedimentation tank facing the first end wall and the first end wall, and the water storage area is connected to the water storage area through the water inlet gap at the bottom end of the water-blocking wall of the outermost contact sedimentation tank.

[0014] Furthermore, a plurality of maintenance wells penetrating the ground are arranged at intervals on the top wall, and are respectively connected to the contact sedimentation tank, the denitrification tank, the deep purification tank and the filtration tank.

[0015] Furthermore, the contact sedimentation tank, denitrification tank, deep purification tank and filtration tank all include an inclined tank bottom with an inclined slope, the slope of the tank bottom is 0.004-0.008, and the inclined tank bottom is also provided with a water inlet gap connected to the corresponding water inlet gap.

[0016] Furthermore, a sludge pit for collecting sludge is provided at the bottom of the slope of the inclined pool bottom, and the sludge is discharged through the sludge discharge port.

[0017] Furthermore, the reaction treatment tank includes a bottom wall, and the inclined pool bottom is inclined and protruded from the corresponding part of the bottom wall toward the contact sedimentation tank, denitrification tank, deep purification tank and filtration tank; the slope bottom of the inclined pool bottom is flush with the bottom wall, and the water inlet gap is formed by the corresponding slope bottom of the inclined pool bottom and the corresponding water inlet gap.

[0018] Furthermore, the contact sedimentation tank, denitrification tank, deep purification tank and filtration tank are respectively provided with phosphorus removal filler, yellow wood, modified biochar and calcium series filler, and the filler is fixed in the contact sedimentation tank, denitrification tank, deep purification tank and filtration tank through an installation bracket.

[0019] In combination with the above technical solutions and the technical problems solved, please analyze the advantages and positive effects of the technical solutions to be protected by the present invention from the following aspects:

[0020] First, in view of the technical problems existing in the above-mentioned prior art and the difficulty of solving the problems, the technical solutions to be protected by the present invention and the results and data during the research and development process are closely combined to analyze in detail and deeply how the technical solutions of the present invention solve the technical problems, and some creative technical effects brought about after solving the problems. The specific description is as follows:

[0021] The bottom end of the water wall of the natural water body water quality purification and deep treatment device is provided with a water inlet gap for water intake, and the top end is provided with a water flow gap for discharging water, so that the water enters the contact sedimentation tank, denitrification tank, deep purification tank and filtration tank through the corresponding water inlet gaps, and is discharged from the corresponding water flow gaps after being filled; and because the height of the water flow wall decreases successively along the length direction from the first end wall to the second end wall; therefore, the water body flows in a natural flow from high to low under its own gravity, and turns and flows in a circuitous manner in the reaction treatment tank, without the need to use multi-stage lifting equipment and reflux equipment, thereby reducing the investment in equipment and saving costs; and no additional site is required to accommodate the multi-stage lifting equipment and reflux equipment, which greatly reduces the floor space required for installing the equipment and greatly saves construction costs and operating costs.

[0022] At the same time, the device is completely buried underground and blends in with the surrounding landscape, without secondary pollution such as noise and odor, and the ground above the device can be used for other purposes, thus improving the utilization rate of land.

[0023] In addition, the contact sedimentation tank, denitrification tank, deep purification tank and filtration tank of this device are equipped with phosphorus removal fillers, yellow wood, modified biochar, and calcium-based fillers, respectively, to imitate the self-purification function of the material cycle in nature, strengthen the principle of natural biological purification, and use local natural and waste materials to achieve the purification and restoration of natural water bodies in an efficient, environmentally friendly and economical manner. The phosphorus removal filler in the contact sedimentation tank is formed by hot processing using iron filings, steel slag, limestone, charcoal, etc. in a certain proportion. It has a large specific surface area and permeability and can release Fe 3+, Ca 2+ , the removal rate of phosphorus can be as high as more than 90%; the yellowed wood in the denitrification pool is made of decayed wood through technological modification, which can release part of the carbon source in the reaction process, thereby reducing the addition of additional carbon source or even eliminating it, greatly reducing the cost of reagents. At the same time, it imitates the mechanism of "plant yellowing phenomenon" in agronomy - "nitrogen starvation phenomenon", through the huge difference between the C / N (80-100) of the filler itself and the C / N (10) required for the reproduction and growth of microorganisms, a temporary severe nitrogen deficiency environment is created, forcing microorganisms to absorb nitrogen in sewage, thereby The denitrification process is completed in a short time; the modified biochar in the deep purification tank is made of natural materials charcoal and polyglucosamine. Through high-tech physical modification of charcoal, the negative charges on the surface of charcoal are completely shielded. It not only has good hardness and is not easy to break, but also maintains good compatibility with microorganisms, which is conducive to the entry of microorganisms into its capillary pores. At the same time, due to the high porosity, it provides a unique three-dimensional structure for a large number of microbial membranes, which can make sewage more convenient to enter its pores to play the role of microbial feeding and degradation, and also make the normally shed biofilm flow out of the pores with water to prevent material clogging.

[0024] Second, as auxiliary evidence of the inventiveness of the claims of the present invention, it is also reflected in the following important aspects:

[0025] (1) The expected benefits and commercial value of the technical solution of the present invention after transformation are:

[0026] From a cost perspective, the device does not require multi-stage lifting and reflux equipment, which significantly reduces equipment investment, construction costs and operating expenses. Secondly, in terms of fillers, the production cost is low, and the raw materials are taken from natural renewable materials or waste materials for secondary processing. It is environmentally friendly and has a very long service life. There is almost no need to replace the fillers during operation and maintenance. At the same time, it always maintains a relatively efficient deep purification effect, which greatly reduces the subsequent maintenance costs.

[0027] In terms of land use, the facility is completely buried underground, allowing the ground above to be used for other purposes, such as laying landscape plants or as a parking lot. At a time when urban land resources are scarce, it can effectively reduce the land occupation costs required for sewage treatment facilities and enhance the comprehensive use value of the land, thereby bringing significant economic benefits.

[0028] With the improvement of environmental protection standards, the market demand for devices that can economically, efficiently and stably purify natural water quality and meet the country's high water quality requirements is growing. Due to its excellent performance, this device has broad market promotion potential and is expected to occupy a place in the field of natural water quality restoration and deep purification, thereby creating significant sales revenue.

[0029] (2) The technical solution of the present invention fills the technical gap in the industry at home and abroad:

[0030] In the field of natural water purification and deep treatment, existing membrane separation technology and advanced oxidation processes such as photocatalysis and electrochemical oxidation can intercept and remove pollutants in water and achieve deep water purification. These technologies are highly efficient and controllable, but are usually accompanied by high energy consumption and costs. Commonly used wetlands, artificial floating islands, underwater forests, etc. have limited purification efficiency and are difficult to operate and manage.

[0031] The present invention realizes the natural flow of sewage directional and circuitous purification through unique structural design, achieves better purification effect without using multi-stage lifting and return equipment, and solves the pain points of existing common technologies.

[0032] The present invention is also unique in terms of fillers. First, one of the fillers used in the present invention, the modified biochar, has the ability to synergistically treat pollutants. After modification, it not only has the ability of traditional biochar to adsorb a variety of pollutants, but also has excellent compatibility with microorganisms after the surface negative charge is shielded. The large amount of various microorganisms produces an explosive effect, which can quickly decompose the adsorbed organic matter and continuously restore the adsorption capacity of the filler, filling the technical gap that traditional biochar adsorption is easily saturated and regenerated. Secondly, yellow wood, as a new type of renewable biomass environmentally friendly material, not only realizes the resource utilization of waste, but is also less used in the field of water treatment. It has important application value in some water treatment projects that have special requirements for environmentally friendly materials, filling the gap in the application of environmentally friendly materials in this field.

[0033] The present invention is innovative in the design concept and technical implementation of natural water purification and deep treatment equipment, filling the gap in related technologies.

[0034] (3) Whether the technical solution of the present invention solves the technical problems that people have been eager to solve but have not been able to solve successfully:

[0035] For a long time, the river and lake water purification industry has been exploring a technical solution, hoping to integrate multiple technical advantages, while meeting the high-standard water purification needs, reducing costs and floor space, and reducing the trouble of frequent replacement and replenishment of fillers in later operation and maintenance, and the fillers have environmental protection characteristics to avoid secondary pollution. The emergence of the present invention has successfully solved this problem. It uses the gravity of the sewage itself to drive the flow through a reasonable pool layout and structural design, thereby avoiding the high cost and space occupation problems caused by multi-stage lifting and reflux equipment. In addition, the use of specially treated fillers ensures the effective removal of pollutants such as suspended solids (SS), chemical oxygen demand (COD), biochemical oxygen demand (BOD), nitrogen and phosphorus, adsorbable organic halides (AOX), and anionic surfactants (LAS) in sewage, which can meet the Class III water indicators in the "Surface Water Environmental Quality Standards" and meet the current urgent needs for purification and restoration of micro-polluted and heavily polluted water bodies.

[0036] (4) Whether the technical solution of the present invention overcomes technical prejudice:

[0037] Traditional concepts hold that in order to achieve efficient water purification, it is necessary to rely on complex lifting and return equipment to ensure that sewage circulates between different treatment units to achieve the desired treatment effect. Alternatively, simple and crude ecological treatment methods such as dredging and water replacement, planting aquatic plants and stocking fish are adopted, and the treatment effect is difficult to sustain. However, the present invention, through the innovative pool structure design, shows that there is no need for multi-stage lifting and return equipment, and only relies on the natural flow of sewage and the synergistic effect of microorganisms in different purification materials in each treatment pool. It not only conveniently achieves efficient water purification, but also the purified effluent contains protozoa and metazoa, which greatly promotes the digestion of sediment and ecological restoration of the receiving water body.

[0038] In the field of water treatment, the application exploration of environmentally friendly materials is relatively limited, especially the development and utilization of new biomass environmentally friendly materials. The present invention applies yellow wood, a new renewable biomass environmentally friendly material, to the design of water treatment devices, breaking people's narrow understanding of the application scope of environmentally friendly materials and broadening the application prospects of environmentally friendly materials in the field of water treatment.

[0039] The application of modified biochar in the present invention breaks through the conventional understanding that biochar has strong adsorption capacity but is extremely easy to saturate and difficult to regenerate. It proves to people that through material modification and innovation, it not only retains the advantages of biochar, but also promotes a strong microbial cultivation effect, and realizes the cultivation of bacteria in the original water of polluted water microorganisms, which can achieve efficient and coordinated treatment of multiple pollutants, greatly protect indigenous microorganisms, avoid the invasion of alien species, and is beneficial to the restoration of the self-purification ability of water bodies.

[0040] These innovations have opened up new ideas and directions for the development of sewage treatment technology and promoted technological progress in the entire industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a structural schematic diagram of a natural water body water purification and deep treatment device provided by an embodiment of the present invention, which sequentially comprises a reaction treatment tank, a contact sedimentation tank, a denitrification tank, a deep purification tank and a filtration tank.

[0042] Figure 2 This is a COD index test data chart of an application implementation case provided by an embodiment of the present invention.

[0043] Figure 3 This is a TN index test data chart of an application implementation case provided by an embodiment of the present invention.

[0044] Figure 4 This is a chart of NH3-N index test data for an application implementation case provided by an embodiment of the present invention.

[0045] Figure 5 It is a TP indicator test data chart of an application implementation case provided by an embodiment of the present invention.

[0046] In the figure: 1. reaction treatment tank; 2. contact sedimentation tank; 3. denitrification tank; 4. deep purification tank; 5. filtration tank; 1-1. top wall; 1-2. bottom wall; 1-3. first end wall; 1-4. second end wall; 1-5. observation and maintenance window; 1-6. water inlet; 1-7. water outlet; 1-8. water storage area; 1-9. water inlet gap; 1-10. water-blocking gap; 2-1. water-blocking wall; 2-2. water-passing wall; 2-3. mud outlet; 2-4. water-passing channel; 2-5. phosphorus removal filler; 3. denitrification tank; 3-1. denitrification material; 3-2. backwash aeration device; 4. deep purification tank; 4-1. modified biochar; 4-2. backwash and oxygenation aeration device; 5. filtration tank; 5-1. calcium-based filler. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0048] like Figure 1 As shown, an embodiment of the present invention provides a device for purifying and deeply treating natural water, which is used for treating natural water. The device is arranged underground, blending with the surrounding landscape, and has no secondary pollution such as noise and odor. The device includes a reaction treatment tank 1, a contact sedimentation tank 2, a denitrification tank 3, a deep purification tank 4, and a filtration tank 5, which are arranged side by side in the reaction treatment tank 1 along the length direction of the reaction treatment tank 1 and are connected in sequence.

[0049] The reaction treatment tank 1 comprises a top wall 1-1, a bottom wall 1-2 opposite to the top wall 1-1, a first end wall 1-3 and a second end wall 1-4. The first end wall 1-3 and the second end wall 1-4 are respectively located at two ends of the reaction treatment tank 1 along the length direction, and are respectively connected to the corresponding ends of the top wall 1-1 and the bottom wall 1-2.

[0050] The top wall 1-1 is provided with a plurality of observation and maintenance windows 1-5 that penetrate the ground at intervals, and these observation and maintenance windows 1-5 are respectively connected to the contact sedimentation tank 2, the denitrification tank 3, the deep purification tank 4, and the filtration tank 5. These observation and maintenance windows 1-5 are convenient for observing or maintaining the contact sedimentation tank 2, the denitrification tank 3, the deep purification tank 4, and the filtration tank 5. Green vegetation can be set on the ground above the top wall 1-1, which, on the one hand, protects the reaction treatment tank 1; on the other hand, it plays a role in beautifying the environment, and at the same time, it also serves to isolate the odor, sound, etc. in the water treatment process, and will not cause such secondary pollution. It should be noted that in addition to setting green vegetation on the ground above the top wall 1-1, it can also be used for other purposes according to demand, thereby improving the utilization rate of the land.

[0051] A water inlet 1-6 is provided at the upper part of the first end wall 1-3 near the top wall 1-1; a water outlet 1-7 is provided at the upper part of the second end wall 1-4 near the top wall 1-1. The contact sedimentation tank 2, the denitrification tank 3, the deep purification tank 4, and the filtration tank 5 are sequentially connected and installed in the reaction treatment tank 1 along the length direction from the first end wall 1-3 to the second end wall 1-4. A water storage area 1-8 for regulating and temporarily storing water is provided between the contact sedimentation tank 2 at the outermost end facing the first end wall 1-3 and the first end wall 1-3, and the water storage area 1-8 is connected to the bottom of the contact sedimentation tank 2 at the outermost end.

[0052] The water enters the water storage area 1-8 through the water inlet 1-6, and is purified by the contact sedimentation tank 2, the denitrification tank 3, the deep purification tank 4, and the filtration tank 5, and then discharged through the water outlet 1-7.

[0053] The contact sedimentation tank 2, the denitrification tank 3, the deep purification tank 4, and the filtration tank 5 all include a water barrier wall 2-1 and a water-passing wall 2-2 parallel to the water barrier wall 2-1. The top of each water barrier wall 2-1 is connected to the top wall 1-1, and a water inlet gap 1-9 is left between the bottom end of each water barrier wall 2-1 and the bottom wall 1-2. A water-passing gap 1-10 is left between the top of the water-passing wall 2-2 and the top wall 1-1, and the bottom end of each water-passing wall 2-2 is connected to the bottom wall 1-2. A water-passing channel 2-4 separated by the water barrier wall 2-1 and the water-passing wall 2-2 is formed between any two adjacent ones of the contact sedimentation tank 2, the denitrification tank 3, the deep purification tank 4, and the filtration tank 5. The water inlet gap 1-9 at the bottom end of the water barrier wall 2-1 of the outermost contact sedimentation tank 2 is connected to the water storage area 1-8. The height of the water wall 2-2 decreases in the length direction from the first end wall 1-3 to the second end wall 1-4. The contact sedimentation tank 2, the denitrification tank 3, and the filtration tank 5 are provided with a backwash aeration device 3-2 at the bottom near the bottom wall 1-2, and the deep purification tank 4 is provided with a backwash and oxygenation aeration device 4-2 at the bottom near the bottom wall 1-2.

[0054] Please continue to refer to Figure 1 The contact sedimentation tank 2 is also provided with a phosphorus removal filler layer 2-5, the denitrification tank 3 is also provided with a denitrification filler layer 3-1, the deep purification tank 4 is also provided with a modified biochar layer 4-1, and the filtration tank 4 is also provided with a calcium-based filler layer 5-1, all of which are fixed inside the corresponding tank body through mounting brackets.

[0055] When the device is used to treat natural water, the water enters the water storage area 1-8 from the water inlet 1-6, and enters the outermost contact sedimentation tank 2 from the water inlet gap 1-9 at the bottom of the water barrier wall 2-1 of the outermost contact sedimentation tank 2. The water fills the outermost contact sedimentation tank 2 from the bottom of the outermost contact sedimentation tank 2, so that the water is fully in contact with the phosphorus removal filler layer 2-5 in the outermost contact sedimentation tank 2, thereby improving the utilization rate of the phosphorus removal filler layer 2-5 and improving the phosphorus removal treatment effect of the water. After the water fills the outermost contact sedimentation tank 2, it flows from the water gap 1-10 at the top of the water wall 2-2 of the outermost contact sedimentation tank 2 to the water passage 2-4, and then flows into the adjacent denitrification tank 3 through the water inlet gap 1-9 at the bottom of the corresponding water barrier wall 2-1, and then flows to the next corresponding water passage 2-4 through the water gap 1-10 at the top of the corresponding water wall 2-2. After the water flows through the contact sedimentation tank 2, the denitrification tank 3, the deep purification tank 4 and the filter tank 5 in the above manner, it flows out from the water outlet 1-7. The water flows in the contact sedimentation tank 2, the denitrification tank 3, the deep purification tank 4 and the filter tank 5 in a baffled manner as described above, and because the height of the water wall 2-2 decreases in the length direction from the first end wall 1-3 to the second end wall 1-4, the water flows in a baffled manner in the reaction treatment tank 1 in a natural flow from high to low under its own gravity, without the need to use multi-stage lifting equipment and reflux equipment, thereby reducing the investment in equipment and saving costs; and no additional site is required to place the multi-stage lifting equipment and reflux equipment, which greatly reduces the floor space required for installing the equipment and greatly saves construction costs and operating costs. In addition, the water enters from the bottom of the contact sedimentation tank 2, the denitrification tank 3, the deep purification tank 4 and the filter tank 5, and flows out after filling the contact sedimentation tank 2, the denitrification tank 3, the deep purification tank 4 and the filter tank 5. In this way, the water stays in the reaction treatment tank 1 for a long time and is fully in contact with the purification fillers in the contact sedimentation tank 2, the denitrification tank 3, the deep purification tank 4 and the filter tank 5, thereby improving the purification effect and the utilization rate of the purification fillers.

[0056] In order to further improve the purification effect of the water body, the device also includes an ultraviolet disinfection pool (not shown), and the water in the filter pool 5 is discharged into the ultraviolet disinfection pool through a water pipe for disinfection treatment.

[0057] It should be noted that when the device is used to treat different water sources or different water volumes, it is based on the prediction results of the water quality and the water treatment volume.

[0058] In this application implementation case, the effluent index after treatment by the device of the present invention is set to be better than the Class III water quality standard in the national "Surface Water Environmental Quality Standard" (GB3838-2002). (Specific data can be seen in the following chart)

[0059] Figure 2 This is a COD index test data chart of an application implementation case provided by an embodiment of the present invention.

[0060] Figure 3 This is a TN index test data chart of an application implementation case provided by an embodiment of the present invention.

[0061] Figure 4 This embodiment of the present invention provides an application implementation case NH 3 -N indicator test data chart.

[0062] Figure 5 It is a TP indicator test data chart of an application implementation case provided by an embodiment of the present invention.

[0063] from Figure 2 It can be seen that the device of the present invention has a significant effect on the treatment of COD concentration of influent and effluent. Whether in 2009 or 2015, the average COD concentration of influent was significantly higher than the average COD concentration of effluent. In particular, in 2015, the average COD concentration of effluent was reduced to less than 10 mg / L, reaching or even exceeding the Class III water quality standard in the National Surface Water Environmental Quality Standard (GB3838-2002).

[0064] from Figure 3 The data show that the treatment effect of the present invention on TN concentration is also significant. From 2009 to 2015, the average TN concentration of the inlet water continued to rise, but the average TN concentration of the outlet water was always controlled at around 1 mg / L. This shows that the device has a stable nitrogen pollutant removal capacity to ensure that the water quality meets the standards.

[0065] like Figure 4 As shown in the figure, the device of the present invention performs outstandingly in the removal of NH3-N. In 2009, the average concentration of NH3-N in the inlet water was only about 0.2 mg / L, but in 2015, the average concentration of the inlet water increased to 0.8 mg / L. However, the average concentration of the outlet water remained below 0.1 mg / L, which is far below the national Class III water quality standard.

[0066] Figure 5 This reflects the device's ability to handle TP concentration. The average influent TP concentration continued to increase from 2009 to 2015, but the average effluent TP concentration remained stable at less than 0.1 mg / L, significantly lower than the average influent concentration. This stable phosphorus removal effect provides a guarantee for controlling eutrophication of water bodies.

[0067] According to the treatment effect data of the above indicators, the overall performance of the device of the present invention is excellent. Its treatment efficiency for major pollutants such as COD, TN, NH3-N and TP is significantly higher than that of traditional treatment technologies, and the effluent water quality is consistently better than Class III water quality standards.

[0068] Comprehensive analysis of the data results shows that the device of the present invention can efficiently purify a variety of pollutants in water, ensuring that the effluent index meets or exceeds the national standards. This technology has significant environmental and economic benefits, is suitable for a variety of water treatment scenarios, and has broad prospects for promotion and application.

[0069] Example 1: Lake water quality restoration

[0070] The device of the present invention is used to repair the polluted lake water quality by measuring COD, TN, TP, NH 3 -N and other pollutants to achieve water purification and ecological restoration.

[0071] 1) Device installation

[0072] The device is installed on the shore of a lake, the reaction treatment tank 1 is buried underground, and the top wall 1-1 is covered with green vegetation to blend in with the surrounding landscape and avoid damage to the natural environment.

[0073] 2) Operation process

[0074] Inlet: Lake water enters the water storage area 1-8 through the water inlet 1-6, which is used to regulate and temporarily store water and evenly distribute the flow.

[0075] Contact sedimentation tank 2: The water flows through the contact sedimentation tank 2, and the phosphorus removal filler layers 2-5 remove phosphates from the water and precipitate suspended matter at the same time.

[0076] Denitrification tank 3: Denitrifying bacteria in the denitrification filler layer 3-1 reduce nitrate and nitrite to nitrogen gas, reducing TN concentration.

[0077] Deep purification tank 4: The modified biochar layer 4-1 further adsorbs organic pollutants and increases the dissolved oxygen concentration through the oxygenation aeration device 4-2.

[0078] Filter tank 5: When water enters filter tank 5, calcium-based filler layer 5-1 adsorbs heavy metal ions and residual phosphates, and is eventually discharged through outlet 1-7, reaching Class III surface water standards.

[0079] Example 2: Improving water quality in river sections

[0080] The device of the present invention is used to improve the water quality of a river section, and by setting the device at a specific section, the pollutant concentration is controlled within the environmental protection standard.

[0081] 1) Device installation

[0082] The device is buried on the bank of the river, and the area above the top wall 1-1 is designed as an urban landscape park, which combines greening and leisure facilities to improve land utilization and avoid secondary pollution.

[0083] 2) Operation process

[0084] Water Intake: River water enters the water storage area 1-8 through the water inlet 1-6.

[0085] Contact sedimentation tank 2: The phosphorus removal filler layer 2-5 is used to quickly remove particulate pollutants and phosphates under the action of the backwash aeration device 3-2.

[0086] Denitrification tank 3: Microorganisms in the denitrification filler layer 3-1 degrade nitrate nitrogen and nitrite nitrogen.

[0087] Deep purification tank 4: The modified biochar layer 4-1 deeply adsorbs organic pollutants and increases the oxygen content of the water through the oxygenation aeration device 4-2.

[0088] Filter tank 5: The calcium-based filler layer 5-1 further removes dissolved phosphorus and other trace pollutants. The purified water is discharged from the outlet 1-7.

[0089] These two embodiments demonstrate the practical application and remarkable processing effect of the device of the present invention in different scenarios, and have broad promotion value.

[0090] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any modifications, equivalent substitutions and improvements made by any technician familiar with the technical field within the technical scope disclosed by the present invention and within the spirit and principle of the present invention should be covered by the protection scope of the present invention.

Claims

1. A device for purifying and deeply treating natural water, characterized in that: include: Reaction treatment tank; and a contact sedimentation tank, a denitrification tank, a deep purification tank and a filtration tank which are sequentially arranged side by side in the reaction treatment tank and connected in sequence; The contact sedimentation tank, denitrification tank, deep purification tank and filtration tank all include a water-blocking wall and a water-passing wall, wherein a water inlet gap is provided at the bottom of the water-blocking wall, a water-passing gap is provided at the top of the water-passing wall, and the height of the water-passing wall decreases successively in the direction from the contact sedimentation tank to the filtration tank.

2. The device for purifying and deeply treating natural water as claimed in claim 1, characterized in that: The reaction treatment tank includes a top wall opposite to the bottom wall, the top of the water-blocking wall is connected to the top wall, the bottom of the water-passing wall is connected to the bottom wall and is spaced from the bottom wall to form a corresponding water inlet gap; the top of the water-passing wall is spaced from the top wall to form a corresponding water-passing gap.

3. The device for purifying and deeply treating natural water as claimed in claim 1, characterized in that: The reaction treatment tank comprises a first end wall and a second end wall respectively connecting the opposite ends of the top wall and the bottom wall, the first end wall and the second end wall are respectively located at the two ends of the reaction treatment tank along the length direction, and the contact sedimentation tank, the denitrification tank, the deep purification tank and the filtration tank are sequentially connected and installed in the reaction treatment tank along the length direction from the first end wall to the second end wall; a water storage area is provided between the outermost contact sedimentation tank facing the first end wall and the first end wall, and the water storage area is connected to the water storage area through the water inlet gap at the bottom end of the water-blocking wall of the outermost contact sedimentation tank.

4. The device for purifying and deeply treating natural water as claimed in claim 3, characterized in that: A plurality of maintenance wells penetrating the ground are arranged on the top wall at intervals and are respectively connected with the contact sedimentation tank, the denitrification tank, the deep purification tank and the filtration tank.

5. The device for purifying and deeply treating natural water as claimed in claim 4, characterized in that: The contact sedimentation tank, denitrification tank, deep purification tank and filtration tank all include an inclined tank bottom with an inclined slope, the slope of the tank bottom is 0.004-0.008, and the inclined tank bottom is also provided with a water inlet gap connected to the corresponding water inlet gap.

6. The device for purifying and deeply treating natural water as claimed in claim 5, characterized in that: A sludge pit for collecting sludge is provided at the bottom of the slope of the inclined pool bottom, and the sludge is discharged through the sludge discharge port.

7. The device for purifying and deeply treating natural water as claimed in claim 1, characterized in that: The reaction treatment tank includes a bottom wall, and the inclined pool bottom is inclined and protruded from the corresponding part of the bottom wall toward the contact sedimentation tank, the denitrification tank, the deep purification tank and the filtration tank; the slope bottom of the inclined pool bottom is flush with the bottom wall, and the water inlet gap is formed by the corresponding slope bottom of the inclined pool bottom and the corresponding water inlet gap.

8. The device for purifying and deeply treating natural water as claimed in claim 5, characterized in that: The contact sedimentation tank, denitrification tank, deep purification tank and filtration tank are respectively provided with phosphorus removal filler, yellow wood, modified biochar and calcium series filler, and the filler is fixed in the contact sedimentation tank, denitrification tank, deep purification tank and filtration tank through mounting brackets.

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