Water body purification and dephosphorization device suitable for high-concentration desilting phosphorus-containing tail water

Abstract

A water body purification and dephosphorization device suitable for high-concentration desilting phosphorus-containing tail water comprises a suspension area located at the front end of the dephosphorization device and used for separating impurities from water by adding chemicals; the contact area is in through connection with the suspension area, and a gas-water mixture is arranged in the contact area to accelerate suspension of impurities; the separation area is communicated with the contact area to realize precipitation of sewage, and a scum scraper for removing scum is arranged at the upper end of the separation area; and the scum storage area is positioned above the separation area, is positioned on one side of the scum scraper and is used for collecting scum. The device is compact and reasonable in structure and convenient to operate, and has excellent performance in the aspects of efficient phosphorus removal, automatic operation, small occupied area, cost optimization, environmental protection, sustainability and the like. The method not only solves the problem of treatment of the high-concentration phosphorus-containing tail water, but also improves the treatment efficiency, reduces the operation cost, protects the water ecological environment, and realizes organic unification of economic benefits, social benefits and environmental benefits.

Description

TECHNICAL FIELD

[0001] The utility model relates to phosphorus removal device technical field especially a water body purification phosphorus removal device suitable for high concentration dredging phosphorus tail water. BACKGROUND

[0002] In deep water dredging engineering, the tail water after silt deposition contains high concentration phosphorus, if the tail water is directly discharged into the water body without treatment, the phosphorus in the water body will cause a large number of algae aquatic organisms to breed, destroy the ecological balance of the water body.

[0003] The method for removing phosphorus from water body mainly includes chemical phosphorus removal method, biological phosphorus removal method and adsorption phosphorus removal method.

[0004] 1. The chemical phosphorus removal method is to add chemical reagents to form insoluble phosphate precipitates, and then remove phosphorus from sewage by solid-liquid separation method.

[0005] 2. The biological phosphorus removal method is an economical phosphorus removal method, which utilizes the characteristics of polyphosphorus bacteria releasing phosphorus under anaerobic conditions and then excessively taking up phosphorus under aerobic conditions to achieve the purpose of phosphorus removal by discharging phosphorus-containing sludge. The biological phosphorus removal method has the advantages of low treatment cost, no secondary pollution, etc., but needs a long treatment time, and the phosphorus removal effect is not as good as that of the chemical phosphorus removal method.

[0006] 3. The adsorption phosphorus removal method is to use adsorbents to adsorb phosphorus in sewage, and common adsorbents include activated carbon, zeolite, ceramsite, etc. The adsorption phosphorus removal method has the advantages of good treatment effect and high treatment efficiency, but needs regular replacement of adsorbents, which is high in cost.

[0007] The above methods have certain advantages in phosphorus removal, but also have certain problems. Based on these problems, the water body purification phosphorus removal device suitable for high concentration dredging phosphorus tail water is proposed. CONTENT OF THE UTILITY MODEL

[0008] The applicant provides a water body purification phosphorus removal device suitable for high concentration dredging phosphorus tail water to solve the above-mentioned problems in the prior art, which has excellent performance in efficient phosphorus removal, automatic operation, small land occupation, cost optimization, environmental protection and sustainability. It not only solves the problem of high concentration phosphorus tail water treatment, but also improves the treatment efficiency, reduces the operation cost, protects the water ecological environment, and realizes the organic unity of economic benefit, social benefit and environmental benefit.

[0009] The technical scheme adopted by the utility model is as follows:

[0010] A water body purification phosphorus removal device suitable for high concentration dredging phosphorus tail water, comprising:

[0011] The suspension zone is located at the front end of the dephosphorization device and separates impurities from water by adding reagents;

[0012] The contact zone is connected to the suspension zone and contains a gas-water mixture to accelerate the suspension of impurities.

[0013] The separation zone is connected to the contact zone to achieve sewage sedimentation. A scraper is provided at the upper end of the separation zone to remove scum.

[0014] A slag storage area, located above the separation area and on one side of the scraper, for collecting slag;

[0015] By combining chemical treatment with flotation technology, efficient removal of phosphorus in water can be achieved.

[0016] Furthermore, the suspension zone includes a coagulation zone and a flocculation zone.

[0017] Furthermore, the coagulation zone is provided with a PAC agitator for adding PAC reagents into the water body and promoting the destabilization and coagulation of colloidal particles in the water body to form larger flocs.

[0018] Furthermore, the flocculation zone is provided with a PAM agitator for adding PAM reagent into the water body.

[0019] Furthermore, the contact zone is connected to a pressure air dissolving tank through a pipeline, and a pressure pump is provided inside the pressure air dissolving tank for mixing and pressurizing air and water to form an air-water mixture, which is injected into the contact zone through a bubble releaser to contact with the phosphorus-containing floc suspension to make the floc float to the water surface; and the upper end of the contact zone close to the separation zone is inclined toward the direction of the scraper to improve the suspension effect.

[0020] Furthermore, the pressure gas dissolving tank is also connected to an air compressor to provide compressed air for the air compressor, which is a key equipment for the formation of the gas-water mixture.

[0021] Furthermore, the pressure dissolved air tank is also connected to a reflux water pump, which is connected to the clean water area for circulation and replenishment of water in the system.

[0022] Furthermore, a water collector disposed horizontally is provided in the middle of the side wall of the separation zone for collecting treated clean water and guiding it to a subsequent treatment unit or a discharge port.

[0023] Furthermore, it also includes a sludge conveying line connected to the slag storage area for exporting sludge.

[0024] Furthermore, a plurality of pipes connected to the sludge conveying line are provided at the lower end of the separation zone for conveying out impurities with higher density and improving the water quality in the separation zone.

[0025] The beneficial effects of the utility model are as follows:

[0026] This utility model boasts a compact and rational structure, is easy to operate, and excels in efficient phosphorus removal, automated operation, a small footprint, cost optimization, environmental protection, and sustainability. It not only solves the challenge of treating high-concentration phosphorus-containing tailwater, but also improves treatment efficiency, reduces operating costs, protects the aquatic ecosystem, and achieves an organic unity of economic, social, and environmental benefits. Therefore, this device has broad application prospects and promotional value, and is of great significance in promoting water pollution control and water resource protection.

[0027] At the same time, the utility model also has the following advantages:

[0028] 1. The high-concentration phosphorus-containing tail water dephosphorization device of the utility model realizes the efficient removal of phosphorus in water bodies by combining innovative chemical treatment with flotation technology. The combined use of PAC and PAM agents significantly enhances the flocculation effect, so that the phosphorus element is tightly wrapped in the flocculent body, effectively improving the phosphorus removal efficiency. At the same time, the highly automated design of the device, such as automatic dosing, bubble release, scraping and other processes, reduces manual intervention, reduces the difficulty of operation, and improves the treatment efficiency. This efficient and automated treatment method not only meets the urgent needs of high-concentration phosphorus-containing tail water treatment, but also reduces labor costs and improves the overall treatment efficiency.

[0029] 2. The device features a compact, integrated design, with all components combined into a single unit via a skid-mounted structure. This significantly reduces floor space and enables flexible deployment even in land-constrained environments. Furthermore, optimized equipment layout and the selection of energy-efficient auxiliary equipment, such as pressure-dissolving gas tanks, air compressors, and return water pumps, reduce energy consumption and operating costs. Furthermore, the device's reusability further reduces overall long-term operating costs. This cost-optimized design concept gives the device significant economic advantages, facilitating widespread application.

[0030] 3. While efficiently removing phosphorus, this device also prioritizes environmental protection and sustainability. By combining chemical treatment with flotation technology, it effectively removes pollutants from water bodies, reducing phosphorus levels, minimizing the risk of eutrophication, and protecting the aquatic ecosystem. Furthermore, the device design incorporates the collection and treatment of sludge and scum. Sludge and impurities generated during the treatment process are removed via a sludge conveyor line, facilitating subsequent resource utilization or harmless disposal, thereby avoiding secondary pollution. This environmentally friendly and sustainable design concept aligns with the current requirements of ecological civilization development and promotes the sustainable use of water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural diagram of the present utility model.

[0032] in:

[0033] 100, coagulation zone; 200, flocculation zone; 300, slag storage zone; 400, contact zone; 500, separation zone; 600, clean water zone; 700, sludge conveying line;

[0034] 101, PAC agitator; 201, PAM agitator; 401, pressure dissolved air tank; 402, air compressor; 403, reflux water pump; 501, scraper; 502, water collector. DETAILED DESCRIPTION

[0035] The specific implementation of the present utility model will be described below with reference to the accompanying drawings.

[0036] The purpose of this utility model is to provide an efficient phosphorus removal device for high-concentration phosphorus-containing tail water. This device can remove high-concentration phosphorus in water through chemical treatment, without requiring excessive manual operation. It has a significant phosphorus removal effect, high treatment efficiency, simple equipment, low treatment cost, reusable device, and a small footprint. It is particularly suitable for the purification of high-concentration phosphorus-containing tail water.

[0037] This utility model aims to provide a water purification and phosphorus removal device suitable for treating high-concentration phosphorus-containing tailwater from desilted wastewater. By combining chemical treatment with flotation technology, it achieves efficient removal of phosphorus from water. The device features a compact overall design, a small footprint, a high degree of automation, simple operation, and low maintenance costs, making it particularly suitable for treating high-concentration phosphorus-containing tailwater.

[0038] like Figure 1 As shown, the phosphorus removal device in this embodiment includes a coagulation zone 100, a flocculation zone 200, a slag storage zone 300, a contact zone 400, a separation zone 500, and a clean water zone 600, as well as a series of auxiliary equipment installed in each zone. Each component is connected by pipes and valves to form a complete treatment system. The specific structure is as follows:

[0039] The coagulation zone 100 in this embodiment is located at the front end of the flotation tank and is equipped with a PAC agitator 101 for adding PAC reagent. PAC, as a coagulant, can effectively promote the destabilization and aggregation of colloidal particles in the water body to form larger flocs.

[0040] In this embodiment, the flocculation zone 200 is adjacent to the coagulation zone and is provided with a PAM stirrer 201 for adding PAM reagent. PAM, as a high molecular weight flocculant, can further promote the formation and growth of flocs and enhance the stability and sedimentation of flocs.

[0041] The coagulation zone 100 and the flocculation zone 200 are combined into a suspension zone, which is used to separate impurities in water by using chemicals.

[0042] The contact zone 400 in this embodiment is the key area of ​​the flotation reaction. The contact zone 400 is located after the flocculation zone 200. The lower end of the side wall of the flocculation zone 200 close to the contact zone 400 is connected to a water outlet for discharging water into the contact zone 400. At the same time, the contact zone 400 is connected to the separation zone 500. The contact zone 400 is connected to the pressure dissolved air tank 401 through a pipeline. The air-water mixture generated by the pressure dissolved air tank 401 is injected into the contact zone through the bubble releaser, contacts with the phosphorus-containing floc suspension, forms an attachment area, and causes the flocs to float to the water surface.

[0043] Furthermore, the upper end of the contact area 400 close to the separation area 500 is inclined toward the scraper 501 , so as to facilitate the movement of the gas-water mixture toward the separation area, thereby improving the suspension effect.

[0044] The pressure dissolved air tank 401 in this embodiment is sealed to dissolve air and is internally provided with a pressure pump to mix and pressurize air and water so that the air is fully dissolved in the water to form an air-water mixture.

[0045] The contact area 400 is also connected to an air compressor 402 to provide compressed air to the pressure dissolved air tank 401, and is a key device for the formation of the gas-water mixture.

[0046] At the same time, the pressure dissolved air tank 401 is also connected to the clean water area 600 through the reflux water pump 403 for circulation and replenishment of water in the system.

[0047] The separation zone 500 in this embodiment is located after the contact zone 400, and is used to completely separate the water and the scum through natural sedimentation or further treatment.

[0048] The scraper 501 in this embodiment is located above the separation zone 500. The rotation of the reducer drives the scraper to rotate, scraping the scum and suspended matter on the water surface to the edge of the pool;

[0049] The water collector 502 in this embodiment is located in the middle of the side wall of the separation zone 500 and tends to be set horizontally. The sewage will be stratified in the separation zone 500, with the upper layer being air-floating scum and the bottom also being impurities with higher density. Therefore, the water quality is good only in the middle part of the separation zone 500. Therefore, by adopting the water collector 502 that tends to be set horizontally, the treated clean water in the separation zone 500 can be collected and guided to the subsequent treatment unit or discharge port.

[0050] The slag storage area 300 in this embodiment is located on one side of the scraper 501 and collects the slag scraped by the scraper 501 for subsequent processing or discharge.

[0051] In the clean water area 600 of this embodiment, the treated clean water is collected in this area and is ready for the next step of treatment or direct discharge.

[0052] This embodiment also includes a sludge conveying line 700 connected to the slag storage area 300 for exporting sludge; at the same time, the lower end of the separation area 500 is provided with multiple pipes connected to the sludge conveying line 700 for transporting out impurities with higher density and improving the water quality in the separation area 500.

[0053] The various partitions in this embodiment can be combined into a whole through a skid-mounted structure, thereby forming an integrated structure, optimizing product layout, and saving overall space.

[0054] The specific working principle of this embodiment is as follows:

[0055] High-concentration phosphorus-containing tailwater first enters the flotation tank's coagulation zone 100. The PAC agitator 101 is activated, and PAC reagent is added to the water. Under the agitator's vigorous stirring, the PAC rapidly dissolves and reacts with colloidal particles in the water, forming larger flocs. The water then enters the flocculation zone 200, where the PAM agitator 201 is activated, and PAM reagent is added. The addition of PAM further promotes the formation and growth of flocs, tightly encapsulating the phosphorus in the water.

[0056] After coagulation and flocculation, the water enters contact zone 400. Here, compressed air generated by air compressor 402 in pressure-dissolving tank 401 mixes with the water to form an air-water mixture. This mixture is pressurized by a booster pump and then injected into the contact zone via a bubble releaser. When the bubbles come into contact with the phosphorus-containing flocculent suspension, they form attachment areas on its surface. Due to the large surface area of ​​the bubbles, numerous attachment points are formed, allowing the flocs to float to the surface along with the bubbles.

[0057] With the continuous injection of bubbles and the continuous rise of flocs, a layer of scum gradually forms on the water surface. At this point, the scraper 501 is activated, and the rotating scraper scrapes the scum to the edge of the pool and into the scum collection tank. Although not directly numbered, it can be considered to be connected to or part of the scum storage area 300. The scum in the scum collection tank is mainly composed of phosphorus-containing flocs and other suspended matter, making it easy to handle or discharge.

[0058] The treated water then flows out of the flotation tank through the outlet and into the clean water area 600 for further treatment or direct discharge. Throughout the treatment process, the automatic control system monitors and adjusts the operating status of each device to ensure efficient and stable operation of the system.

[0059] In summary, through the coordinated work of components such as the coagulation zone 100, the flocculation zone 200, the contact zone 400, the scraper 501 and the clear water zone 600, combined with auxiliary equipment such as the PAC agitator 101, the PAM agitator 201, the pressure dissolved air tank 401, and the air compressor 402, the present device achieves efficient treatment of high-concentration phosphorus-containing tail water.

[0060] The above description is an explanation of the utility model, not a limitation of the utility model. The scope of the utility model is defined by the claims. Any form of modification can be made within the scope of protection of the utility model.

Claims

1. A water purification and phosphorus removal device suitable for high-concentration dredging of phosphorus-containing tail water, characterized in that: include: The suspension zone is located at the front end of the dephosphorization device and separates impurities from water by adding reagents; The contact zone is connected to the suspension zone and contains a gas-water mixture to accelerate the suspension of impurities. The separation zone is connected to the contact zone to achieve sewage sedimentation. A scraper is provided at the upper end of the separation zone to remove scum. A slag storage area, located above the separation area and on one side of the scraper, for collecting slag; a clean water zone connected to the separation zone and used for storing clean water; By combining chemical treatment with flotation technology, efficient removal of phosphorus in water can be achieved.

2. A water purification and phosphorus removal device suitable for high-concentration dredging phosphorus-containing tail water according to claim 1, characterized in that: The suspension zone includes a coagulation zone and a flocculation zone.

3. A water purification and phosphorus removal device suitable for high-concentration dredging phosphorus-containing tail water according to claim 2, characterized in that: The coagulation zone is provided with a PAC stirrer for adding PAC reagent into the water body and promoting the destabilization and coagulation of colloidal particles in the water body to form larger flocs.

4. A water purification and phosphorus removal device suitable for high-concentration dredging phosphorus-containing tail water according to claim 2, characterized in that: The flocculation zone is provided with a PAM stirrer for adding PAM reagent into the water body.

5. The water purification and phosphorus removal device suitable for high-concentration dredging phosphorus-containing tail water according to claim 1, characterized in that: The contact zone is connected to a pressure air dissolving tank through a pipeline. A pressure pump is provided inside the pressure air dissolving tank for mixing and pressurizing air and water to form an air-water mixture, which is injected into the contact zone through a bubble releaser to contact with phosphorus-containing floc suspension, causing the floc to float to the water surface; and the upper end of the contact zone close to the separation zone is inclined toward the scraper to improve the suspension effect.

6. A water purification and phosphorus removal device suitable for high-concentration dredging phosphorus-containing tail water according to claim 5, characterized in that: The pressure dissolved air tank is also connected to an air compressor to provide compressed air for the air compressor.

7. A water purification and phosphorus removal device suitable for high-concentration dredging phosphorus-containing tail water according to claim 6, characterized in that: The pressure dissolved air tank is also connected to a reflux water pump, which is connected to the clean water area for circulation and replenishment of water in the system.

8. The water purification and phosphorus removal device suitable for high-concentration dredging phosphorus-containing tail water according to claim 1, characterized in that: A water collector disposed horizontally is provided in the middle of the side wall of the separation zone for collecting treated clean water and guiding it to a subsequent treatment unit or a discharge port.

9. The water purification and phosphorus removal device suitable for high-concentration dredging phosphorus-containing tail water according to claim 1, characterized in that: It also includes a sludge conveying line connected to the slag storage area for exporting the sludge.

10. A water purification and phosphorus removal device suitable for high-concentration dredging phosphorus-containing tail water according to claim 9, characterized in that: The lower end of the separation zone is provided with a plurality of pipes connected to the sludge conveying line for conveying out impurities with higher density and improving the water quality in the separation zone.

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