High-efficiency integrated water purification device and process thereof

Abstract

The present application relates to water treatment technical field, specifically relates to a kind of high-efficiency integrated water purification treatment device and process, its technical scheme is: including front-end dosing device and integrated water treatment device;The backwash water reflux cabin is equipped with grid buffer, the grid buffer top is provided with siphon downpipe, the siphon downpipe input side is connected with siphon uppipe output side one side upwards, the grid buffer below one side is provided with backwash water reflux port, the backwash water reflux port is arranged on the vertical partition of tank body, the backwash water reflux port is connected backwash water reflux cabin and flocculation cabin;The beneficial effects of the present application are: by grid buffer, the flow rate of backwash water is slowed down, it is backflowed to flocculation cabin along backwash water reflux port, to reach the effect of using micro-flocculation in waste water to promote new flocculation formation, so that coagulant dosage is reduced;And, backwash water closed loop reuse significantly improves system water production rate, compared with traditional process also more water-saving.

Description

Technical Field

[0001] This invention relates to the field of water treatment technology, specifically to a high-efficiency integrated water purification device and its process. Background Technology

[0002] Conventional civil engineering water plants typically employ a decentralized layout of "coagulation sedimentation tanks + ordinary rapid filter tanks." This model has inherent drawbacks such as long construction periods, large land areas, and low water resource utilization rates, specifically manifested as follows: The backwash water treatment is crude: In the existing water purification process, backwash wastewater is often directly discharged or discharged into the sludge tank, which not only wastes water resources (backwash water accounts for 5%-10%), but also fails to effectively utilize the micro flocs (particle size 5-20μm) in the wastewater, resulting in an increase in the amount of coagulant added at the front end. The amount of coagulant added at the front end needs to be maintained at 15-20mg / L, resulting in high chemical costs. Low construction and expansion efficiency: The civil construction period of civil engineering water plants is as long as 6-12 months, and it is difficult to carry out equipment installation and infrastructure construction in parallel. When the water use scale expands, it is necessary to re-acquire land, excavate, and pour concrete, resulting in poor expansion flexibility. Bottleneck of flocculation and sedimentation efficiency: Traditional vertical flow reaction tanks have long flocculation time and low surface load in the sedimentation zone, resulting in a large equipment footprint. In addition, water flow disturbance during flocculation can easily damage the floc structure, making it difficult to break through the bottleneck of sedimentation efficiency. Insufficient equipment durability: Traditional equipment mostly uses ordinary carbon steel or concrete structures, which are prone to corrosion and wear, have many moving parts, high maintenance costs, and service life that cannot meet the needs of long-term operation. In summary, as the water shortage problem becomes increasingly severe, traditional water purification processes have gradually revealed structural defects such as long construction cycles, high energy consumption, and serious water waste when dealing with sudden water pollution and meeting decentralized water supply needs. Therefore, it is necessary to invent a high-efficiency integrated water purification device and its process. Summary of the Invention

[0003] To achieve the above objectives, the present invention provides the following technical solution: a high-efficiency integrated water purification device, comprising a front-end dosing device and an integrated water treatment device; The front-end dosing device includes a dosing mixing tank, and a coagulant dosing device and a disinfectant dosing device are installed and connected to the side wall of the dosing mixing tank; The integrated water treatment device includes an integrated water purification tank. A vertical baffle is installed inside the tank. One side of the vertical baffle is configured as a flocculation chamber, and the middle of the other side is configured as a horizontal baffle. An automatic backwash filter chamber is located above the horizontal baffle, and a sedimentation and water collection plate is installed below it. Below the sedimentation and water collection plate is a slanted tube sedimentation chamber. A backwash water return chamber is located between the sedimentation and water collection plate and the horizontal baffle. An inlet pipe is installed on one side of the upper part of the integrated water purification tank, and an outlet pipe is installed on the other side. One end of the inlet pipe is connected to a chemical mixing tank, and the other end is connected to the flocculation chamber. The outlet pipe is connected to the automatic backwash filter chamber. The flocculation chamber contains... Equipped with a grid flocculant, the tank has a sedimentation zone inlet pipe at the lower part of the vertical partition, which connects the flocculation chamber and the inclined tube sedimentation chamber. An inclined tube sedimentator is installed in the inclined tube sedimentation chamber. A siphon riser is installed at the top of the sedimentation collection plate, extending to the automatic backwash filter chamber. A water distributor is installed at the upper end of the siphon riser. A water tank partition is installed in the middle of the automatic backwash filter chamber, and a backwash water tank is set below the water tank partition. A grid buffer is installed in the backwash water return chamber, and a siphon downpipe is installed above the grid buffer, connecting to the upper end of the siphon riser. A backwash water return port connecting the backwash water return chamber and the flocculation chamber is set on one side below the grid buffer.

[0004] Preferably, the multi-layered grid flocculants are arranged and installed on the inner wall of the flocculation chamber, and the grid specifications of each layer of the grid flocculants are different. The backwash water return outlet leads to the multi-layered grid flocculants in the middle of the flocculation chamber, and the bottom of the flocculation chamber is set as a coagulation reaction zone without grid flocculants.

[0005] Preferably, the inclined tube sedimentation tank is located above the inlet pipe of the sedimentation zone. The interior of the inclined tube sedimentation tank is filled with inclined tube packing material, which is installed at a 60° angle to the horizontal plane. The sedimentation water collection plate has an upward bulge in the middle and is distributed with water collection holes. A water collection pipe is installed on the top of the sedimentation water collection plate. The output end of the water collection pipe is connected to a siphon riser pipe. The bottom of the inclined tube sedimentation chamber is set as a sludge deposition zone. A sedimentation zone discharge pipe is installed on one side of the bottom of the inclined tube sedimentation chamber.

[0006] Preferably, the water distributor includes a main water distributor, which is installed on the top of the automatic backwash filter chamber. The bottom of the main water distributor has a small hole, and several branch water distributors are installed at the bottom of the main water distributor. The branch water distributors have small holes at their bottoms, and the upper output end of the siphon riser is connected to the top of the main water distributor.

[0007] Preferably, the multi-layer filter media system includes a filter media frame, which is installed on the inner wall of the automatic backwash filter chamber above the water outlet pipe of the tank. A support layer is provided on the top of the filter media frame, a lower layer of filter media is provided on the top of the support layer, and an upper layer of filter media is provided on the top of the lower layer of filter media.

[0008] Preferably, the water outlet pipe of the tank is arranged between the filter media frame and the water tank partition, a water tank funnel is installed at the center of the bottom of the water tank partition, the lower end of the water tank funnel extends downward to the bottom of the backwash water tank, a water tank air inlet pipe is installed on one side of the upper part of the backwash water tank, and an electrically controlled valve is installed at the output end of both the water outlet pipe of the tank and the air inlet pipe of the water tank, and a water level sensor is installed inside the backwash water tank.

[0009] Preferably, the input end of the siphon downpipe is connected upward to one side of the output end of the siphon uppipe, the top of the siphon downpipe is provided with an inverted U-shaped structure, a siphon breaker is installed on the top of the tank's transverse partition, a siphon breaker tube is provided inside the siphon breaker, one end of the siphon breaker tube is inserted into the siphon breaker near the bottom, and the other end extends and connects to the middle of the siphon downpipe.

[0010] Preferably, the multi-layered mesh buffers are arranged and installed in the backwash water return chamber. A backwash water return port is provided on one side of the lower part of the backwash water return chamber, and a backwash water discharge pipe is installed on the other side. The backwash water return port is located on the vertical partition of the tank body. Both the backwash water discharge pipe and the backwash water return port are equipped with electrically controlled valves.

[0011] Preferably, the coagulant dosing device includes a coagulant tank, a coagulant metering pump is installed on the top of the coagulant tank, a coagulant dosing pipe is installed at the output end of the coagulant metering pump, and the output end of the coagulant dosing pipe is connected to a dosing mixing tank. The disinfectant dosing device includes a disinfectant tank, a disinfectant metering pump is installed on the top of the disinfectant tank, a disinfectant dosing pipe is installed at the output end of the disinfectant metering pump, and the output end of the disinfectant dosing pipe is connected to a dosing mixing tank.

[0012] The water purification process of the above-mentioned high-efficiency integrated water purification device includes S1-S5; S1. First, start the coagulant and disinfectant dosing devices to add coagulant and disinfectant into the dosing mixing tank. After the raw water passes through the dosing mixing tank, it carries the coagulant and disinfectant into the flocculation chamber through the tank inlet pipe. The flow direction and velocity of the raw water are continuously changed by the multi-layer grid flocculant. The added coagulant is further mixed with the water by its own hydraulic action. The suspended colloids in the water collide and stir with each other, and the suspended impurities are flocculated into larger particles in the coagulation reaction zone at the bottom of the flocculation chamber through the coagulation reaction. S2. Then, the water in the flocculation chamber flows into the inclined tube sedimentation chamber through the inlet pipe of the sedimentation zone. Impurities slide down the inclined tube wall of the inclined tube sedimentator to the bottom sludge deposition area. The clear water after sedimentation flows upward through the inclined tube sedimentator through the small hole at the top of the sedimentation collection plate into the collection pipe, and then enters the siphon riser pipe from the collection pipe. S3. The siphon riser pipe lifts the clean water upward to the automatic backwash filter chamber, and then the water distributor evenly distributes the water into the multi-layer filter media system. The water passes through the upper filter media, lower filter media, support layer and filter media frame from top to bottom. The filtered water enters the backwash water tank for storage through the water tank funnel. When the water level rises and overflows from the backwash water tank to the tank outlet pipe, the filtered water flows into the clean water pool through the tank outlet pipe. S4. When the filter is first put into operation, the filter media layer is relatively clean. However, after a certain period of operation, due to the gradual increase of solid particles and impurities in the multi-layer filter media system, the water level at the top of the multi-layer filter media system gradually rises and enters the siphon downpipe along the siphon riser pipe. When the water level in the siphon downpipe rises to the inverted U-shaped structure, the water flows down rapidly from the siphon downpipe. Relying on the air-carrying and ejecting effect of the water flow, the air in the siphon downpipe forms a vacuum, and a large amount of water in the siphon riser pipe enters the siphon downpipe, which can then start backwashing. The multi-layer filter media system is flushed from bottom to top in the backwash water tank. During the flushing process, the water level in the backwash water tank gradually decreases. After about 1 minute of flushing, when the water level in the tank drops to the siphon destroyer, air enters the siphon downpipe along the siphon destroyer pipe, and the siphon is destroyed. The flushing process ends here, and filtration starts again. S5. The flushing wastewater flows into the backwash water return chamber through the siphon downcomer. The high-speed water flow into the backwash water return chamber is repeatedly cut and diverted through the grid buffer, and the flow velocity is rapidly reduced. Then, part of the wastewater in the backwash water return chamber flows back into the flocculation chamber through the backwash water discharge return port. The high concentration of micro-flocs in the backwash water further flocculates with the newly added coagulant in the flocculation chamber, thereby significantly reducing the amount of coagulant added. At the same time, the remaining wastewater in the backwash water return chamber is discharged through the backwash water discharge pipe.

[0013] The beneficial effects of this invention are: By slowing down the flow rate of backwash water through a grid buffer, it is returned to the flocculation chamber along the backwash water return port. This achieves the effect of using micro-flocs in wastewater to promote the formation of new flocs, thereby reducing the amount of coagulant added and thus reducing the cost of chemicals. In addition, the closed-loop reuse of backwash water significantly improves the system's water production rate and is more water-saving than traditional processes. The integrated design of the grid flocculant and the inclined tube settler is adopted. The grid flocculant changes the water flow state, which significantly improves the flocculation collision effect compared with the traditional vertical flow reaction and greatly shortens the flocculation time. At the same time, the inclined tube settler has a larger area than the traditional vertical flow settler, which increases the surface load of the sedimentation zone. The equipment footprint is reduced compared with the traditional process, and the sedimentation efficiency is improved. The modular construction method of factory prefabrication and on-site assembly allows equipment manufacturing and civil foundation construction to be carried out simultaneously, which can effectively shorten the construction cycle. When water demand increases, standardized modules can be added directly in parallel without downtime for modification. The system layout is flexible and proactive, with strong adaptability. The core components are made of stainless steel, and the design with no moving parts ensures a service life of over 50 years; the integrated high-efficiency water purifier occupies a significantly smaller area than the traditional sedimentation tank + filtration tank model. Attached Figure Description

[0014] Figure 1 This is a front view provided for the present invention; Figure 2 A schematic diagram of the front internal structure of the integrated water purification tank provided by the present invention; Figure 3 A schematic diagram of the internal structure of the back of the integrated water purification tank provided by the present invention; Figure 4 A cross-sectional view of the internal structure of the integrated water purification tank provided by the present invention; Figure 5 A schematic diagram of the internal structure of the integrated water purification tank provided by the present invention; Figure 6 Side cross-sectional view of the internal structure of the integrated water purification tank provided for this invention; Figure 7 Detailed internal structure of the upper part of the integrated water purification tank provided for this invention; Figure 8 Detailed internal structure diagram of the central part of the integrated water purification tank provided for this invention; Figure 9 Detailed internal structure of the lower part of the integrated water purification tank provided for this invention; Figure 10 This is a schematic diagram of the front-end dosing device provided by the present invention; Figure 11 A cross-sectional view of the dosing and mixing tank provided by the present invention.

[0015] In the diagram: 111. Integrated water purification tank; 112. Vertical partition of the tank; 113. Horizontal partition of the tank; 114. Sedimentation and water collection plate; 121. Water inlet pipe of the tank; 122. Grid flocculant; 123. Water inlet pipe of the sedimentation zone; 124. Sewage pipe of the sedimentation zone; 125. Inclined tube sedimentator; 126. Water collection pipe; 131. Siphon riser pipe; 132. Main water distributor; 133. Branch water distributor; 134. Filter media frame; 135. Support layer; 136. Lower filter media; 137. Upper filter media; 14. 1. Tank outlet pipe; 142. Water tank baffle; 143. Water tank funnel; 144. Water tank air inlet pipe; 151. Siphon downpipe; 152. Grid buffer; 153. Backwash water return port; 154. Backwash water discharge pipe; 155. Siphon breaker; 156. Siphon breaker pipe; 171. Chemical mixing tank; 172. Coagulant tank; 173. Coagulant metering pump; 174. Coagulant dosing pipeline; 175. Disinfectant tank; 176. Disinfectant metering pump; 177. Disinfectant dosing pipeline. Detailed Implementation

[0016] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0017] like Figure 1 - Figure 9 As shown, a high-efficiency integrated water purification device includes a front-end dosing device and an integrated water treatment device. The front-end dosing device includes a dosing mixing tank 171, and a coagulant dosing device and a disinfectant dosing device are installed and connected to the side wall of the dosing mixing tank 171; The integrated water treatment device includes an integrated water purification tank 111. A vertical baffle 112 is installed inside the integrated water purification tank 111. A flocculation chamber is set on one side of the vertical baffle 112, and a horizontal baffle 113 is installed in the middle of the other side. An automatic backwash filter chamber is set above the horizontal baffle 113. A sedimentation and water collection plate 114 is installed below the horizontal baffle 113. An inclined tube sedimentation chamber is set below the sedimentation and water collection plate 114. A backwash water return chamber is set between the sedimentation and water collection plate 114 and the horizontal baffle 113. An integrated water purification tank 111 has a tank inlet pipe 121 installed on one side of its upper part and a tank outlet pipe 141 installed on the other side. One end of the tank inlet pipe 121 is connected to a chemical mixing tank 171, and the other end is connected to a flocculation chamber. The inlet end of the tank outlet pipe 141 is connected to an automatic backwash filter chamber. A grid flocculant 122 is installed inside the flocculation chamber. A sedimentation zone inlet pipe 123 is provided below the vertical partition 112 of the tank. The sedimentation zone inlet pipe 123 connects the flocculation chamber and the inclined tube sedimentation chamber. An inclined tube sedimentator 125 is installed inside the inclined tube sedimentation chamber. A water collection pipe 126 is installed on the top of the sedimentation collection plate 114. The outlet end of the water collection pipe 126 is connected to a siphon riser pipe 131. The outlet end of the siphon riser pipe 131 extends upward to... The automatic backwash filter chamber has a water distributor installed at the output end of the siphon riser 131. A water tank partition 142 is installed in the middle of the automatic backwash filter chamber. A backwash water tank is set below the water tank partition 142. A multi-layer filter media system is installed above the water tank partition 142. A grid buffer 152 is installed in the backwash water return chamber. A siphon downpipe 151 is set above the grid buffer 152. The input end of the siphon downpipe 151 is connected upward to one side of the output end of the siphon riser 131. A backwash water return port 153 is set on one side below the grid buffer 152. The backwash water return port 153 is set on the vertical partition 112 of the tank body. The backwash water return port 153 connects the backwash water return chamber and the flocculation chamber.

[0018] In the above embodiments, it should be noted that the present invention adopts a design in which the grid flocculant 122 is not integrated with the inclined tube sedimentation tank 125. After the raw water passes through the dosing and mixing tank 171, it flows into the flocculation chamber through the tank inlet pipe 121. The multi-layer grid flocculant 122 continuously changes the flow direction and velocity of the raw water. Relying on its own hydraulic action, the flocculation collision effect is more than twice that of the traditional vertical flow reaction, which greatly shortens the flocculation time. The inclined tube sedimentation tank 125 is filled with "inclined tube packing" (usually honeycomb plastic tubes made of PP or PVC). These tubes are installed at a 60° angle to the horizontal plane. The area of ​​the inclined tube sedimentation tank 125 is larger than that of the traditional vertical flow sedimentation tank, the surface load of the sedimentation zone is increased, the equipment footprint is reduced compared with the traditional process, and the sedimentation efficiency is improved. The siphon riser 131 lifts the clean water upward to the automatic backwash filter chamber, and then the water distributor evenly distributes the water into the multi-layer filter system. The water flows from top to bottom through the multi-layer filter system, and the filtered water flows through the water tank partition 142 into the backwash water tank. When the water level rises and overflows from the backwash water tank to the tank outlet pipe 141, the filtered water flows into the clean water pool along the tank outlet pipe 141. After the equipment has been running for a certain period of time, the amount of solid particulate impurities in the multi-layer filter system gradually increases. The water level at the top of the multi-layer filter system gradually rises and enters the siphon riser pipe 131, and then enters the siphon downcomer pipe 151. When the water level in the siphon downcomer pipe 151 exceeds the highest level, the water flows down rapidly from the siphon downcomer pipe 151. Relying on the air-carrying and ejecting effect of the water flow, a large amount of water enters the siphon downcomer pipe 151. The backwash water tank flushes the multi-layer filter system from bottom to top. The flushing wastewater flows into the backwash water return chamber through the siphon downcomer pipe 151. After passing through the grid buffer 152 step by step, part of the wastewater flows back into the flocculation chamber through the backwash water discharge return port 153. By returning the backwash water to the flocculation chamber, the micro-flocs in the wastewater are used as "crystal nuclei" to promote the formation of new flocs, reducing the amount of coagulant (PAC) added by 15%-20%, thereby reducing the cost of chemicals. At the same time, the closed-loop reuse of backwash water increases the system's water production rate and is more water-saving than traditional processes. This invention adopts a modular construction method of factory prefabrication and on-site assembly, with equipment manufacturing and civil foundation construction carried out simultaneously, which can shorten the construction time of water purification plant projects by nearly half compared to traditional civil construction. When water demand increases, standardized modules can be added in parallel without downtime for modification, making the system layout flexible and proactive with strong adaptability. Moreover, the core components are made of stainless steel, and the design with no moving parts ensures a service life of more than 50 years. The integrated high-efficiency water purifier occupies a significantly smaller area than the traditional sedimentation tank + filter tank model, and the backwash water volume is reduced by more than 30%.

[0019] like Figure 1 - Figure 11 As shown, a high-efficiency integrated water purification device and its process further include: a coagulant dosing device comprising a coagulant tank 172, a coagulant metering pump 173 installed on the top of the coagulant tank 172, a coagulant dosing pipe 174 installed at the output end of the coagulant metering pump 173, and the output end of the coagulant dosing pipe 174 connected to a dosing mixing tank 171; a disinfectant dosing device comprising a disinfectant tank 175, a disinfectant metering pump 176 installed on the top of the disinfectant tank 175, a disinfectant dosing pipe 177 installed at the output end of the disinfectant metering pump 176, and the output end of the disinfectant dosing pipe 177 connected to the dosing mixing tank 171; and a multi-layer mesh flocculant 1. The 22 are arranged and installed on the inner wall of the flocculation chamber. The grid specifications of each layer of grid flocculants 122 are different. The output end of the backwash water return port 153 leads to the multi-layer grid flocculants 122 in the middle of the flocculation chamber. The bottom of the flocculation chamber is set as a coagulation reaction zone without grid flocculants 122. The inclined tube sedimentation tank 125 is set above the sedimentation zone inlet pipe 123. The inclined tube sedimentation tank 125 is filled with inclined tube packing. The inclined tube packing is installed at a 60° angle to the horizontal plane. The sedimentation water collection plate 114 is raised in the middle and has water collection holes. The bottom of the inclined tube sedimentation tank is set as a sludge deposition zone. The sedimentation zone drain pipe 124 is installed on one side of the bottom of the inclined tube sedimentation tank.

[0020] In the above embodiments, it should be noted that the main function of the front-end dosing device is to add coagulants or disinfectants to flocculate suspended solids and colloidal substances in the water and kill bacteria, thereby enhancing the effect of the integrated water purifier. The coagulant dosing device is a single-stirring, single-tank design. The coagulant is added using a coagulant metering pump 173 to control the dosage stably and accurately. The main body of the coagulant tank 172 is made of PE. The disinfectant dosing device is a sodium hypochlorite dosing device. In daily management, the operator controls the disinfectant metering pump 176 to add sodium hypochlorite solution according to the equipment's effluent requirements to ensure that the residual chlorine and free chlorine agents (free chlorine, mg / L) at the effluent outlet are greater than or equal to 0.3 mg / L, and the residual chlorine and free chlorine agents (free chlorine, mg / L) in the water at the end of the pipe network are greater than or equal to 0.05 mg / L. Different sizes of grid flocculants 122 can continuously change the flow direction and velocity of the raw water, so that the added coagulant can be further mixed with the influent, and the suspended colloids in the water can collide and stir with each other, thereby enhancing the flocculation effect. The inclined tube settler 125 is an improvement on the traditional horizontal flow settler. Under the premise of treating the same amount of water, it can reduce the size of the equipment (or device) and reduce equipment investment. While reducing the size of the equipment by adding inclined tubes, it also greatly improves the hydraulic conditions: when the diameter and spacing of the inclined tubes are small enough (generally around 30mm), the water flow is in a laminar flow state. At this time, the sedimentation of particles is not disturbed by the water flow, which improves the stability of sedimentation and shortens the sedimentation path of particles, thus shortening the sedimentation time. At the same time, a coagulation reaction zone is set at the bottom of the flocculation chamber. After the raw water enters, the suspended impurities are first flocculated into larger particles by the coagulation reaction before entering the inclined tube sedimentation chamber. Compared with the circular vertical flow settler of the same cross section, the inclined tube settler 125 increases the sedimentation area by more than 20%. The lower surface load ensures the sedimentation effect. Under normal circumstances, when the turbidity of the influent is within 1000ppm, the turbidity of the effluent from the settler is ≤15ppm. Water in the flocculation chamber flows into the inclined tube sedimentation chamber through the inlet pipe 123 of the sedimentation zone. Impurities slide down the inclined tube wall of the inclined tube sedimentator 125 to the bottom sludge deposition zone. The clear water after sedimentation flows upward through the inclined tube sedimentator 125 and through the small hole at the top of the sedimentation collection plate 114 into the collection pipe 126. Then, it enters the siphon riser pipe 131 through the collection pipe 126. Impurities in the sludge deposition zone are discharged through the sedimentation zone drain pipe 124.

[0021] like Figure 2 - Figure 9As shown, a high-efficiency integrated water purification device and its process further include a water distributor comprising a main water distributor 132, which is installed on top of the automatic backwash filter chamber. The main water distributor 132 has small holes at its bottom, and several branch water distributors 133 are installed at the bottom of the main water distributor 132. Each branch water distributor 133 has small holes at its bottom. The upper output end of the siphon riser pipe 131 is connected to the top of the main water distributor 132. The multi-layer filter media system includes a filter screen. A filter media frame 134 is installed on the inner wall of the automatic backwash filter chamber above the tank outlet pipe 141. A support layer 135 is provided on top of the filter media frame 134, a lower layer of filter media 136 is provided on top of the support layer 135, and an upper layer of filter media 137 is provided on top of the lower layer of filter media 136. The tank outlet pipe 141 is located between the filter media frame 134 and the water tank partition 142. A water tank funnel 143 is installed at the center of the bottom of the water tank partition 142. The lower end of the water tank funnel 143 extends downward to the bottom of the backwash water tank. An air inlet pipe 144 is installed on one side of the upper part of the backwash water tank. Electrically controlled valves are installed at the output ends of both the tank outlet pipe 141 and the air inlet pipe 144. A water level sensor is installed inside the backwash water tank. An inverted U-shaped structure is provided at the top of the siphon downcomer 151. A siphon breaker 155 is installed at the top of the tank's transverse partition 113. A siphon breaker pipe 156 is installed inside the siphon breaker 155. One end of the fault pipe 156 is inserted into the siphon breaker 155 near the bottom, and the other end extends into the middle of the siphon downpipe 151. The top of the siphon downpipe 151 is provided with an inverted U-shaped structure. The siphon breaker 155 is installed on the top of the tank's transverse partition 113. The siphon breaker pipe 156 is provided inside the siphon breaker 155. One end of the siphon breaker pipe 156 is inserted into the siphon breaker 155 near the bottom, and the other end extends into the middle of the siphon downpipe 151.

[0022] In the above embodiment, it should be noted that after the water in the siphon riser pipe 131 flows into the main water distributor 132, it is distributed to each branch water distributor 133 through the bottom small hole, and then evenly distributed on the surface of the upper filter material 137 through the bottom small hole of the branch water distributor 133. The upper filter media 137 uses anthracite, with a thickness of approximately 400 mm and a particle size of 0.8~1.8 mm. The large pores of anthracite are responsible for intercepting large particles of impurities and preventing the filter surface from clogging too quickly. The lower filter media 136 uses quartz sand, with a thickness of approximately 400 mm and a particle size of 0.5~1.2 mm. The small pores of quartz sand are responsible for intercepting small particles and ensuring the quality of the effluent. The support layer 135 uses gravel and pebbles (particle size 2-16 mm, graded) to support the filter media and prevent sand leakage. The filter media frame 134 is a metal mesh frame used to support the support layer 135. The upper filter media 137, the lower filter media 136, and the support layer 135 form a graded structure of "light on top and heavy on the bottom, coarse on top and fine on the bottom". Combined with the "backwash water recirculation" process of this solution, it can effectively utilize the micro flocs in the backwash water to form a "biofilm" or "contact flocculation layer" on the filter layer surface, thereby further improving the filtration efficiency. The automatic backwash filter chamber designed for this device operates on the following principle: The siphon riser 131 lifts clean water upwards to the automatic backwash filter chamber, where it is then evenly distributed by the water distributor into the multi-layer filter media system. Water flows from top to bottom through the upper filter media 137, lower filter media 136, support layer 135, and filter media frame 134. The filtered water then enters the backwash water tank via the water tank funnel 143 for storage. When the water level rises and overflows from the backwash water tank to the tank outlet pipe 141, the filtered water flows into the clean water pool along the tank outlet pipe 141. Initially, the filter media layer is relatively clean, but after a certain period of operation, due to the gradual increase in solid particulate impurities in the multi-layer filter media system, the water level at the top of the system gradually rises and flows along the siphon riser 131 into the clean water pool. When the water level in the siphon downpipe 151 rises to the inverted U-shaped structure, water flows rapidly down from the siphon downpipe 151. Relying on the air-carrying and ejecting effect of the water flow, the air in the siphon downpipe 151 forms a vacuum, and a large amount of water from the siphon riser pipe 131 enters the siphon downpipe 151, and backwashing can begin. The backwash water tank washes the multi-layer filter media system from bottom to top. During the washing process, the water level in the backwash water tank gradually decreases. After washing for about 5 minutes, when the water level in the tank drops to the siphon destroyer 155, air enters the siphon downpipe 151 along the siphon destroyer pipe 156, and the siphon is destroyed. The washing process ends here, and filtration starts again. This device eliminates the need for traditional mechanical backwash pumps and does not require drawing clean water from the clear water tank for backwashing. This simplifies the entire system by reducing the number of backwash pumps and related pipes, valves, and fittings, greatly reducing the intensity of operation and management and equipment investment. Since backwashing is performed automatically depending on the degree of clogging of the filter layer, human error is reduced, and the entire device can even operate without human intervention. The grid buffer 152 consists of multiple layers of grids with varying densities. The coarse grid is used to block large sludge particles and prevent clogging, while the dense grid is used to cut the water flow and eliminate turbulence. When the backwash water passes through the grid buffer 152, it is repeatedly cut and diverted, and the flow velocity is rapidly reduced. At the same time, the output direction of the backwash water discharge return port 153 is tilted upward. Because the flow direction is changed to "upward", it will not impact the flocs that are settling in the flocculation chamber, but will instead lift the newly formed flocs upward, which is in line with the flocculation process logic. The high concentration of micro-flocs in the backwash water acts as "crystal nuclei" and undergoes "contact flocculation" with the newly added coagulant in the flocculation chamber, thereby significantly reducing the amount of coagulant added. In addition, the remaining wastewater in the backwash water return chamber is discharged through the backwash water discharge pipe 154.

[0023] The water purification process of the high-efficiency integrated water purification device of the present invention is as follows: S1. First, start the coagulant and disinfectant dosing devices to add coagulant and disinfectant into the dosing mixing tank 171. After the raw water passes through the dosing mixing tank 171, it carries the coagulant and disinfectant into the flocculation chamber through the tank inlet pipe 121. The flow direction and velocity of the raw water are continuously changed by the multi-layer grid flocculant 122. By its own hydraulic action, the added coagulant is further mixed with the water. The suspended colloids in the water collide and stir with each other, and the suspended impurities are flocculated into larger particles in the coagulation reaction zone at the bottom of the flocculation chamber through the coagulation reaction. S2. Then, the water in the flocculation chamber flows into the inclined tube sedimentation chamber through the sedimentation zone inlet pipe 123. The impurities slide down the inclined tube wall of the inclined tube sedimentator 125 to the bottom sludge deposition area. The clear water after sedimentation flows upward through the inclined tube sedimentator 125 and through the small hole at the top of the sedimentation collection plate 114 into the collection pipe 126, and then enters the siphon riser pipe 131 through the collection pipe 126. S3. The siphon riser 131 lifts the clean water upward to the automatic backwash filter chamber, and then the water distributor evenly distributes the water into the multi-layer filter media system. The water passes through the upper filter media 137, the lower filter media 136, the support layer 135 and the filter media frame 134 from top to bottom. The filtered water enters the backwash water tank for storage along the water tank funnel 143. When the water level rises and overflows from the backwash water tank to the tank outlet pipe 141, the filtered water flows into the clean water pool along the tank outlet pipe 141. S4. When the filter is first put into operation, the filter media layer is relatively clean. However, after a certain period of operation, due to the gradual increase of solid particles and impurities in the multi-layer filter media system, the water level at the top of the multi-layer filter media system gradually rises and enters the siphon downcomer 151 along the siphon riser 131. When the water level in the siphon downcomer 151 rises to the inverted U-shaped structure, the water flows down rapidly from the siphon downcomer 151. Relying on the air-carrying and ejecting effect of the water flow, the air in the siphon downcomer 151 forms a vacuum, and a large amount of water in the siphon riser 131 enters the siphon downcomer 151, which can start backwashing. The multi-layer filter media system is flushed from bottom to top in the backwash water tank. During the flushing process, the water level in the backwash water tank gradually decreases. After about 5 minutes of flushing, when the water level in the tank drops to the siphon destroyer 155, the air enters the siphon downcomer 151 along the siphon destroyer pipe 156, and the siphon is destroyed. The flushing process ends here, and filtration starts again. S5. The flushing wastewater flows into the backwash water return chamber through the siphon downcomer 151. The high-speed water flow into the backwash water return chamber is repeatedly cut and diverted through the grid buffer 152, and the flow velocity is rapidly reduced. Then, part of the wastewater in the backwash water return chamber flows back into the flocculation chamber through the backwash water discharge return port 153. The high concentration of micro-flocs in the backwash water acts as "crystal nuclei" and "contact flocculation" with the newly added coagulant in the flocculation chamber, thereby significantly reducing the amount of coagulant added. At the same time, the remaining wastewater in the backwash water return chamber is discharged through the backwash water discharge pipe 154.

[0024] The above description is merely a preferred embodiment of the present invention. Any person skilled in the art can modify the present invention or modify it into an equivalent technical solution using the technical solutions described above. Therefore, any simple modifications or equivalent substitutions made based on the technical solutions of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A high-efficiency integrated water purification device, comprising a front-end dosing device and an integrated water treatment device, characterized in that: The front-end dosing device includes a dosing mixing tank, and a coagulant dosing device and a disinfectant dosing device are installed and connected to the side wall of the dosing mixing tank; The integrated water treatment device includes an integrated water purification tank. A vertical baffle is installed inside the tank. One side of the vertical baffle is configured as a flocculation chamber, and the middle of the other side is configured as a horizontal baffle. An automatic backwash filter chamber is located above the horizontal baffle, and a sedimentation and water collection plate is installed below it. Below the sedimentation and water collection plate is a slanted tube sedimentation chamber. A backwash water return chamber is located between the sedimentation and water collection plate and the horizontal baffle. An inlet pipe is installed on one side of the upper part of the integrated water purification tank, and an outlet pipe is installed on the other side. One end of the inlet pipe is connected to a chemical mixing tank, and the other end is connected to the flocculation chamber. The outlet pipe is connected to the automatic backwash filter chamber. The flocculation chamber contains... Equipped with a grid flocculant, the tank has a sedimentation zone inlet pipe at the lower part of the vertical partition, which connects the flocculation chamber and the inclined tube sedimentation chamber. An inclined tube sedimentator is installed in the inclined tube sedimentation chamber. A siphon riser is installed at the top of the sedimentation collection plate, extending to the automatic backwash filter chamber. A water distributor is installed at the upper end of the siphon riser. A water tank partition is installed in the middle of the automatic backwash filter chamber, and a backwash water tank is set below the water tank partition. A grid buffer is installed in the backwash water return chamber, and a siphon downpipe is installed above the grid buffer, connecting to the upper end of the siphon riser. A backwash water return port connecting the backwash water return chamber and the flocculation chamber is set on one side below the grid buffer.

2. The high-efficiency integrated water purification device according to claim 1, characterized in that: The multi-layered grid flocculants are arranged and installed on the inner wall of the flocculation chamber. The grid specifications of each layer of the grid flocculants are different. The backwash water return outlet leads to the multi-layered grid flocculants in the middle of the flocculation chamber. The bottom of the flocculation chamber is set as a coagulation reaction zone without grid flocculants.

3. The high-efficiency integrated water purification device according to claim 1, characterized in that: The inclined tube sedimentation tank is located above the inlet pipe of the sedimentation zone. The interior of the inclined tube sedimentation tank is filled with inclined tube packing material, which is installed at a 60° angle to the horizontal plane. The sedimentation water collection plate has an upward bulge in the middle and has water collection holes distributed thereon. A water collection pipe is installed on the top of the sedimentation water collection plate, and the output end of the water collection pipe is connected to a siphon riser pipe. The bottom of the inclined tube sedimentation chamber is set as a sludge deposition zone, and a sedimentation zone discharge pipe is installed on one side of the bottom of the inclined tube sedimentation chamber.

4. The high-efficiency integrated water purification device according to claim 1, characterized in that: The water distributor includes a main water distributor, which is installed on top of the automatic backwash filter chamber. The main water distributor has a small hole at its bottom and several branch water distributors are installed at the bottom of the main water distributor. The branch water distributors have small holes at their bottoms. The upper output end of the siphon riser is connected to the top of the main water distributor.

5. The high-efficiency integrated water purification device according to claim 1, characterized in that: A multi-layer filter media system is installed above the water tank partition. The multi-layer filter media system includes a filter media frame. The filter media frame is installed on the inner wall of the automatic backwash filter chamber above the water outlet pipe of the tank. A support layer is provided on the top of the filter media frame. A lower layer of filter media is provided on the top of the support layer. An upper layer of filter media is provided on the top of the lower layer of filter media.

6. The high-efficiency integrated water purification device according to claim 5, characterized in that: The tank outlet pipe is located between the filter media frame and the water tank partition. A water tank funnel is installed at the center of the bottom of the water tank partition. The lower end of the water tank funnel extends downward to the bottom of the backwash water tank. A water tank air inlet pipe is installed on one side of the upper part of the backwash water tank. Electrically controlled valves are installed at the output ends of both the tank outlet pipe and the water tank air inlet pipe. A water level sensor is installed inside the backwash water tank.

7. The high-efficiency integrated water purification device according to claim 6, characterized in that: The input end of the siphon downpipe is connected upward to the output end of the siphon riser. The top of the siphon downpipe is provided with an inverted U-shaped structure. A siphon breaker is installed on the top of the tank's transverse partition. A siphon breaker tube is installed inside the siphon breaker. One end of the siphon breaker tube is inserted into the siphon breaker near the bottom, and the other end extends into the middle of the siphon downpipe.

8. The high-efficiency integrated water purification device according to claim 1, characterized in that: The multi-layered mesh buffers are arranged and installed in the backwash water return chamber. A backwash water return port is provided on one side of the lower part of the backwash water return chamber, and a backwash water discharge pipe is installed on the other side. The backwash water return port is located on the vertical partition of the tank body. Both the backwash water discharge pipe and the backwash water return port are equipped with electrically controlled valves.

9. The high-efficiency integrated water purification device according to claim 1, characterized in that: The coagulant dosing device includes a coagulant tank, a coagulant metering pump is installed on the top of the coagulant tank, a coagulant dosing pipe is installed at the output end of the coagulant metering pump, and the output end of the coagulant dosing pipe is connected to a dosing mixing tank. The disinfectant dosing device includes a disinfectant tank, a disinfectant metering pump is installed on the top of the disinfectant tank, a disinfectant dosing pipe is installed at the output end of the disinfectant metering pump, and the output end of the disinfectant dosing pipe is connected to a dosing mixing tank.

10. A water purification process using a high-efficiency integrated water purification device according to any one of claims 1-9, characterized in that: Including S1-S5 S1. First, start the coagulant and disinfectant dosing devices to add coagulant and disinfectant into the dosing mixing tank. After the raw water passes through the dosing mixing tank, it carries the coagulant and disinfectant into the flocculation chamber through the tank inlet pipe. The flow direction and velocity of the raw water are continuously changed by the multi-layer grid flocculant. The added coagulant is further mixed with the water by its own hydraulic action. The suspended colloids in the water collide and stir with each other, and the suspended impurities are flocculated into larger particles in the coagulation reaction zone at the bottom of the flocculation chamber through the coagulation reaction. S2. Then, the water in the flocculation chamber flows into the inclined tube sedimentation chamber through the inlet pipe of the sedimentation zone. Impurities slide down the inclined tube wall of the inclined tube sedimentator to the bottom sludge deposition area. The clear water after sedimentation flows upward through the inclined tube sedimentator through the small hole at the top of the sedimentation collection plate into the collection pipe, and then enters the siphon riser pipe from the collection pipe. S3. The siphon riser pipe lifts the clean water upward to the automatic backwash filter chamber, and then the water distributor evenly distributes the water into the multi-layer filter media system. The water passes through the upper filter media, lower filter media, support layer and filter media frame from top to bottom. The filtered water enters the backwash water tank for storage through the water tank funnel. When the water level rises and overflows from the backwash water tank to the tank outlet pipe, the filtered water flows into the clean water pool through the tank outlet pipe. S4. When the filter is first put into operation, the filter media layer is relatively clean. However, after a certain period of operation, due to the gradual increase of solid particles and impurities in the multi-layer filter media system, the water level at the top of the multi-layer filter media system gradually rises and enters the siphon downpipe along the siphon riser pipe. When the water level in the siphon downpipe rises to the inverted U-shaped structure, the water flows down rapidly from the siphon downpipe. Relying on the air-carrying and ejecting effect of the water flow, the air in the siphon downpipe forms a vacuum, and a large amount of water in the siphon riser pipe enters the siphon downpipe, which can then start backwashing. The multi-layer filter media system is flushed from bottom to top in the backwash water tank. During the flushing process, the water level in the backwash water tank gradually decreases. After about 5 minutes of flushing, when the water level in the tank drops to the siphon destroyer, air enters the siphon downpipe along the siphon destroyer pipe, and the siphon is destroyed. The flushing process ends here, and filtration starts again. S5. The flushing wastewater flows into the backwash water return chamber through the siphon downcomer. The high-speed water flow into the backwash water return chamber is repeatedly cut and diverted through the grid buffer, and the flow velocity is rapidly reduced. Then, part of the wastewater in the backwash water return chamber flows back into the flocculation chamber through the backwash water discharge return port. The high concentration of micro-flocs in the backwash water further flocculates with the newly added coagulant in the flocculation chamber, thereby significantly reducing the amount of coagulant added. At the same time, the remaining wastewater in the backwash water return chamber is discharged through the backwash water discharge pipe.

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