Floating bed pressure type turbid circulating water purification device and purification method

Abstract

The application provides a floating bed pressure type turbid circulating water purification device and purification method, and belongs to the technical field of turbid circulating water treatment. The device comprises a shell, a sludge collecting device, a cyclone coagulation device, a primary purification device and a deep purification device which are sequentially arranged in the internal space of the shell from bottom to top. The cyclone coagulation device comprises a water inlet guide cylinder and a guide ring plate arranged at the bottom port of the water inlet guide cylinder. A water inlet pipe is connected to the tangent direction of the water inlet guide cylinder. The primary purification device comprises a filler sedimentation separation layer and a sludge backflow guide cone arranged below the filler sedimentation separation layer. The deep purification device comprises a filter hopper structure arranged in a sedimentation water outlet area, a filter plate arranged above the filter hopper structure and a suspended elastic filter layer arranged at the bottom of the filter plate. The application can solve the problem that the existing pressure type integrated metallurgical sewage purification technology in the prior art has insufficient flocculation reaction, the effluent still contains a certain amount of suspended solids, oil and carries flocculation body.

Description

Technical Field

[0001] This invention relates to the field of turbid circulating water treatment technology, and more specifically, to a floating bed pressurized turbid circulating water purification device and purification method. Background Technology

[0002] The treatment process for turbid circulating water in the iron and steel metallurgical industry is mainly based on physicochemical methods, including physical and chemical treatment methods such as coagulation, flocculation, clarification, and sedimentation. Therefore, technological innovation around coagulation, flocculation, clarification, and sedimentation, and the development of efficient physicochemical treatment technologies for flocculation and sedimentation are the key to improving the efficiency of wastewater physicochemical treatment, and also a current research challenge in the industry.

[0003] Traditional water treatment processes separate coagulation, flocculation, clarification, and sedimentation into different process equipment or structures. During the chemical coagulation reaction, mechanical stirring is typically used, consuming energy. To improve flocculation and clarification, whether internal or external sludge recirculation is used, additional sludge recirculation equipment is required, also consuming energy. Wastewater enters a traditional atmospheric pressure physiochemical treatment unit via a primary lift, but the purified effluent is depressurized, resulting in insufficient utilization of the primary lift pump's residual energy. The effluent from the atmospheric pressure physiochemical purification unit needs to flow into a suction tank, and then undergo a secondary lift by the pump set before entering a cooling tower or subsequent treatment equipment; this process also consumes additional electricity for the secondary lift.

[0004] Addressing the issues of large land area, high investment, high energy consumption, and high operating costs associated with traditional water treatment processes, our company pioneered a pressurized integrated metallurgical wastewater purification technology, which has been widely adopted in the steel industry. The core concept of this technology is to unify the entire purification process of turbid circulating water within a closed, pressurized structure. The effluent is directly cooled by a cooling tower, reducing secondary pumping compared to traditional water treatment processes. This not only lowers the land area and investment required for the project but also significantly reduces energy consumption, lowering the operating costs of the water treatment facility. This technology integrates flocculation and sedimentation technologies into a single unit and enables sludge recycling within the equipment, improving reagent utilization and flocculation / sedimentation effects. This results in a significant improvement in effluent quality compared to traditional processes, achieving a more sophisticated approach to water treatment facilities while reducing land area requirements. Based on this technology, various styles of pressurized integrated metallurgical wastewater purification devices have been developed on the market, but their fundamental principles remain largely unchanged.

[0005] For example, patent application number CN201010605762.6 discloses a pressurized integrated metallurgical wastewater purification and treatment device. While the proposed solution achieves preliminary purification of the water after coagulation and sedimentation, some suspended particulate matter and grease remain. Since the proposed solution is essentially a combination of a flocculation reactor and a sedimentation unit, the flocculation process relies on hydraulic mixing. The mixing intensity is related to the influent flow rate and velocity, thus affecting the flocculation effect and the final sedimentation result. When the influent flow rate changes significantly, and the sludge discharge disturbs the water body, the sludge deposited in the inclined tubes may be carried out of the device by the water flow, causing deposition and blockage inside the equipment and nozzles at the water-using end. Furthermore, during sludge discharge, some water from other connected devices returns through the sludge discharge device's outlet pipe, impacting the inclined tube packing and breaking up the sludge at the bottom of the packing. When the device finishes sludge discharge and re-intakes water, the disintegrated sludge is carried out of the device by the water flow.

[0006] For example, patent application number CN201820993898.0 discloses a pressurized purification device. While the solution provided by this patent can achieve preliminary purification of water after coagulation and sedimentation, some suspended particles and grease remain in the water. The flocculation reaction zone has weak dynamics, requiring the addition of large amounts of chemicals. The flocculation caused by unreacted chemicals affects the quality of the effluent. When the influent flow rate fluctuates significantly, or when the sludge discharge disturbs the water body, the sludge deposited in the inclined plate packing may be carried out of the device by the water flow, causing deposition and blockage inside the equipment and nozzles at the water-using end. Inclined plate sedimentation has a purification limit under certain hydraulic load and chemical dosage conditions. When higher water quality requirements are needed, additional filtration facilities are required for further purification.

[0007] In summary, existing pressurized integrated metallurgical wastewater purification technologies generally suffer from insufficient flocculation, resulting in effluent containing a certain amount of suspended solids, grease, and flocs. When higher water quality requirements are needed, additional filtration devices are required. Summary of the Invention

[0008] In view of the above problems, the purpose of this invention is to provide a floating bed pressurized turbid circulating water purification device and purification method to solve the problems of insufficient flocculation reaction in the existing pressurized integrated metallurgical wastewater purification technology, which still has a certain amount of suspended solids, grease and flocs in the effluent; and the need to add an additional filtration device when the water quality requirements are high.

[0009] This invention provides a floating bed pressurized turbid water purification device, comprising a shell, and, from bottom to top, a sludge collection device, a cyclone coagulation device, a primary purification device, and a deep purification device arranged within the interior space of the shell; wherein,

[0010] The cyclone coagulation device includes an inlet guide tube and a guide ring plate disposed at the bottom port of the inlet guide tube; an inlet pipe is connected in the tangential direction of the inlet guide tube; the guide ring plate is disposed above the sludge inlet of the sludge collection device.

[0011] The primary purification device includes a packing sedimentation separation layer and a sludge return guide cone disposed below the packing sedimentation separation layer; the apex of the sludge return guide cone is positioned upwards, and the bottom end of the sludge return guide cone is positioned at the top of the inlet guide cylinder; a sedimentation effluent zone is formed above the packing sedimentation separation layer.

[0012] The deep purification device includes a filter media hopper structure with a sieve plate structure disposed on the side wall of the sedimentation outlet area, a filter plate disposed above the filter media hopper structure, and a suspended elastic filter media layer disposed at the bottom of the filter plate; the suspended elastic filter media layer is composed of suspended elastic filter media located inside the filter media hopper structure; the internal space of the filter media hopper structure forms a filter media guiding area; a filtered clear water area is formed above the filter plate; and an outlet pipe is provided in the filtered clear water area.

[0013] Furthermore, a preferred embodiment further includes an elastic filter media regeneration device; the elastic filter media regeneration device includes a filter media regenerator cylinder, and a fluidization device, a cleaning device, and a lifting device arranged sequentially from bottom to top within the internal space of the filter media regenerator cylinder; wherein,

[0014] The fluidization device includes a water distribution chamber, a rectifier filter plate disposed at the top of the water distribution chamber, a connecting pipe disposed at the bottom outlet of the water distribution chamber, and a regenerated water inlet pipe and a regenerated water outlet pipe respectively connected to the two side walls of the connecting pipe; a filter media guide pipe is disposed on the side wall of the filter media regenerator cylinder above the rectifier filter plate; the filter media guide pipe is connected to the bottom of the filter media hopper structure.

[0015] The cleaning device includes a side cleaning water distribution chamber surrounding the outside of the filter media regenerator cylinder, a side cleaning nozzle disposed in the side cleaning water distribution chamber, a side cleaning water pipe connected to the outer side wall of the side cleaning water distribution chamber, and a stirring mechanism disposed inside the filter media regenerator cylinder; the spray end of the side cleaning nozzle is disposed on the inner wall of the filter media regenerator cylinder.

[0016] The lifting device includes a spiral lifting tube, a screw disposed inside the spiral lifting tube, a lifting motor connected to the top of the screw, a material collection port disposed on the bottom side wall of the spiral lifting tube, and an extrusion pipe communicating with the upper side wall of the spiral lifting tube; the material collection end of the material collection port is disposed on the inner wall of the filter media regenerator cylinder, and the material discharge end of the extrusion pipe is disposed inside the filter media hopper structure.

[0017] In addition, a preferred embodiment is that a regenerated water drain pipe is provided on the upper side wall of the filter media regenerator cylinder; a screen is provided at the inlet end of the regenerated water drain pipe; and a regenerated water drain valve is provided on the regenerated water drain pipe.

[0018] Furthermore, in a preferred embodiment, the stirring mechanism includes a stirring shaft and a stirring paddle disposed at the lower part of the stirring shaft; a stirring motor is connected to the top end of the stirring shaft; the stirring motor is disposed on the outer side of the top end of the filter media regenerator cylinder; and / or, a filter media discharge valve is disposed on the filter media guide pipe; and / or, a regenerated water inlet valve is disposed on the regenerated water inlet pipe; and / or, a regenerated water drain valve is disposed on the regenerated water drain pipe; and / or, a side cleaning water valve is disposed on the side cleaning water pipe.

[0019] Furthermore, in a preferred embodiment, the outer shell is a pressure-bearing and sealed space structure formed by the shell and the end cap disposed at the top of the shell; the water outlet pipe is disposed at the top of the end cap; and an automatic water outlet valve is provided on the water outlet pipe.

[0020] Furthermore, a preferred embodiment is that the sludge collection device is a sludge hopper with an inverted conical structure; an automatic sludge discharge pipe is provided on the lower side wall of the sludge hopper; the top opening of the sludge hopper is fitted against the inner wall of the outer shell; the outlet of the automatic sludge discharge pipe passes through the side wall of the outer shell and is located outside the outer shell; and an automatic sludge discharge valve is provided on the automatic sludge discharge pipe.

[0021] Furthermore, in a preferred embodiment, the outer wall of the water inlet guide tube is fixed to the inner wall of the outer casing by a fixing connector; the lower end of the guide ring plate is inclined inward; and / or, the water inlet end of the water inlet pipe is located outside the outer casing; and / or, an automatic water inlet valve is provided on the water inlet pipe.

[0022] Furthermore, in a preferred embodiment, the packing sedimentation separation layer includes a packing support and an inclined tube packing disposed on top of the packing support; the outer peripheral end of the packing support is fitted to the inner sidewall of the outer shell; and / or, the bottom end of the sludge return guide cone is flush with the top end of the inlet guide cylinder.

[0023] Furthermore, in a preferred embodiment, the filter hopper structure includes a material collection hopper and a filter cloth water screen plate arranged around the top opening of the material collection hopper; the upper end of the filter cloth water screen plate is attached to the inner side wall of the outer shell; and / or, a filter cap is provided on the filter plate; and uniform water-permeable slits are opened on the filter cap.

[0024] This invention provides a method for purifying turbid circulating water, which uses the floating bed pressurized turbid circulating water purification device described above to purify the turbid circulating water, and includes the following steps:

[0025] Step S1: The turbid circulating water to be treated enters the inlet guide tube through the inlet pipe along the tangential direction of the inlet guide tube, causing the water flow in the inlet guide tube to form a swirling flow;

[0026] Step S2: Under the action of the swirling flow, some of the coarse solid particles in the turbid circulating water to be treated are separated by centrifugation and fall from the bottom of the inlet guide tube into the sludge collection device; the remaining turbid circulating water to be treated in the inlet guide tube flows upward along the cavity between the inlet guide tube and the inner wall of the outer shell after passing over the guide ring plate and enters the packing sedimentation separation layer.

[0027] Step S3: The sludge in the turbid circulating water to be treated entering the packing sedimentation separation layer is intercepted by the packing sedimentation separation layer and falls from the packing of the packing sedimentation separation layer. It is then guided back to the cavity between the inlet guide tube and the inner wall of the outer shell through the sludge return guide cone, and settles downward into the sludge collection device. The portion that is not intercepted by the packing sedimentation separation layer enters the sedimentation outlet area as the pre-purified turbid circulating water.

[0028] Step S4: The pre-purified turbid circulating water continues to flow upward in the sedimentation outlet area, enters the interior of the filter hopper structure through the sieve plate structure on the side wall of the filter hopper structure, and comes into contact with the suspended elastic filter media layer. The fine iron oxide suspended particles and oil in the pre-purified turbid circulating water are adsorbed and filtered by the suspended filter media layer, so that the pre-purified turbid circulating water is deeply purified.

[0029] Step S5: After the suspended elastic filter media in the suspended elastic filter media layer is saturated with fine iron oxide suspended particles and oil contaminants, its specific gravity gradually increases to greater than 1. The suspended elastic filter media with a specific gravity greater than 1 overcomes buoyancy and the support of the rising water flow and sinks to the filter media guide area. It is intercepted by the side wall of the filter media hopper structure and pushed to the inner bottom of the filter media hopper structure. The deeply purified water obtained from the deep purification enters the filtered clear water area through the filter plate and is discharged through the outlet pipe.

[0030] As can be seen from the above technical solution, the floating bed pressurized turbid circulating water purification device and purification method provided by the present invention, by sequentially arranging a sludge collection device, a vortex coagulation device, a primary purification device, and a deep purification device from bottom to top in the internal space of the outer shell, allows the turbid circulating water to be treated to enter from the inlet pipe along the tangential direction of the inlet guide tube, causing the water flow inside the inlet guide tube to form a vortex, thereby centrifugally separating and removing some of the coarse particle solids in the turbid circulating water to be treated inside the inlet guide tube, and falling into the sludge collection device below by gravity; the sludge that is not separated and removed in the inlet guide tube... After partially overflowing the guide ring plate, the water flows upward along the cavity between the inlet guide tube and the inner wall of the outer shell. It is filtered by the primary purification device to further intercept sludge in the turbid circulating water. The turbid circulating water that has been filtered and settled by the primary purification device is then deeply filtered through a suspended elastic filter media layer formed by the elastic suspended filter media. This removes residual suspended solids, grease, tiny flocs carried in the effluent, and flocs generated by coagulation, thus achieving deep water purification. This effectively avoids the presence of floating solids, grease, and flocs in the effluent, making it suitable for treatment processes with high water quality requirements without the need for additional filtration devices.

[0031] To achieve the foregoing and related objectives, one or more aspects of the invention include the features that will be described in detail below. The following description and accompanying drawings illustrate certain exemplary aspects of the invention. However, these aspects indicate only a few of the various ways in which the principles of the invention can be used. Furthermore, the invention is intended to encompass all such aspects and their equivalents. Attached Figure Description

[0032] Other objects and results of the invention will become more apparent and readily understood with reference to the following description taken in conjunction with the accompanying drawings. In the drawings:

[0033] Figure 1 This is a schematic diagram of the structure of a floating bed pressurized turbid water purification device according to an embodiment of the present invention;

[0034] Figure 2 This is a schematic diagram of the structure of an elastic filter media regeneration device according to an embodiment of the present invention;

[0035] Figure 3 This is a schematic diagram of a floating bed pressurized turbid water purification device according to another embodiment of the present invention;

[0036] Figure 4 This is a flowchart of a turbid circulating water purification method according to an embodiment of the present invention.

[0037] In the attached drawings, 1-outer shell, 11-shell, 12-end cap, 2-sludge collection device, 21-automatic sludge discharge pipe, 211-automatic sludge discharge valve, 31-inlet guide tube, 311-inlet pipe, 3111-automatic inlet valve, 312-fixed connector, 32-guide ring plate, 41-packing sedimentation separation layer, 411-packing support, 412-inclined tube packing, 42-sludge return guide cone, 43-sedimentation effluent zone, 511-collection hopper, 512-filter cloth screen plate, 52-filter plate, 521-filter cap, 53-suspended elastic filter media layer, 531-suspended elastic filter media, 54-filter media guide zone, 55-filtered clear water zone, 551-outlet pipe, 5511-automatic outlet valve, 61-filter media regenerator cylinder, 611-filter media guide tube Flow pipe, 6111-Filter media discharge valve, 62-Fluidization device, 621-Water distribution chamber, 622-Rectifying filter plate, 623-Connecting pipe, 624-Reclaimed water inlet pipe, 6241-Reclaimed water inlet valve, 625-Reclaimed water lower drain pipe, 6251-Reclaimed water lower drain valve, 626-Reclaimed water upper drain pipe, 6261-Grate, 6262-Reclaimed water upper drain valve, 631-Side cleaning water distribution chamber, 632-Side cleaning nozzle, 633-Side cleaning water pipe, 6331-Side cleaning water valve, 634-Agitator, 6341-Agitator shaft, 6342-Agitator paddle, 6343-Agitator motor, 64-Lifting device, 641-Spiral lifting pipe, 642-Screw, 643-Lifting motor, 644-Collection port, 645-Extrusion pipe.

[0038] In all the accompanying drawings, the same reference numerals indicate similar or corresponding features or functions. Detailed Implementation

[0039] In the following description, numerous specific details are set forth for illustrative purposes and to provide a thorough understanding of one or more embodiments. However, it will be apparent that these embodiments may also be implemented without these specific details.

[0040] In response to the aforementioned problems in the existing pressurized integrated metallurgical wastewater purification technology, such as insufficient flocculation reaction, effluent still containing a certain amount of suspended solids, grease, and flocs, and the need for additional filtration devices when higher water quality requirements are required, a floating bed pressurized turbid circulating water purification device and purification method are proposed.

[0041] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0042] To illustrate the floating bed pressurized turbid water purification device and purification method provided by the present invention Figure 1 The structure of a floating bed pressurized turbid water purification device according to an embodiment of the present invention is shown; Figure 2The structure of an elastic filter media regeneration device according to an embodiment of the present invention is shown; Figure 3 The structure of a floating bed pressurized turbid water purification device according to another embodiment of the present invention is shown; Figure 4 The flowchart of a turbid circulating water purification method according to an embodiment of the present invention is shown.

[0043] like Figures 1 to 4 As shown in the figure, the floating bed pressurized turbid water purification device provided by the present invention includes a shell 1, and sludge collection device 2, cyclone coagulation device, primary purification device, and deep purification device arranged sequentially from bottom to top inside the shell 1; wherein,

[0044] The swirl coagulation device includes an inlet guide tube 31 and a guide ring plate 32 disposed at the bottom port of the inlet guide tube 31; an inlet pipe 311 is connected in the tangential direction of the inlet guide tube 31; and the guide ring plate 32 is disposed above the sludge inlet of the sludge collection device 2.

[0045] The primary purification device includes a packing sedimentation separation layer 41 and a sludge return guide cone 42 disposed below the packing sedimentation separation layer 41; the sludge return guide cone 42 is positioned with its cone tip facing upwards, and its bottom end is positioned at the top of the inlet guide cylinder 31; a sedimentation effluent zone 43 is formed above the packing sedimentation separation layer 41.

[0046] The deep purification device includes a filter hopper structure with a sieve plate structure on the side wall of the sedimentation effluent zone 43, a filter plate 52 above the filter hopper structure, and a suspended elastic filter media layer 53 at the bottom of the filter plate 52; the suspended elastic filter media layer 53 is composed of suspended elastic filter media 531 located inside the filter hopper structure; the internal space of the filter hopper structure 51 forms a filter media guiding zone 54; a filtered clear water zone 55 is formed above the filter plate 52; and an effluent pipe 551 is provided in the filtered clear water zone 55.

[0047] The interior of the outer shell 1 is a pressure-bearing, sealed space, and its shape is preferably, but not limited to, cylindrical.

[0048] The sludge collection device 2 is preferably, but not limited to, located at the bottom of the housing 1; the filtered clean water zone 55 is located at the top of the housing 1.

[0049] The water inlet guide tube 31 is preferably, but not limited to, cylindrical. A gap is left between the outer side wall of the water inlet guide tube 31 and the inner side wall of the outer shell 1 to form a cavity.

[0050] The bottom end of the sludge return guide cone 42 is fixed to the top end of the water inlet guide cylinder 31, ensuring that the intercepted sludge can be guided by the sludge return guide cone 42 into the cavity between the water inlet guide cylinder 31 and the outer shell.

[0051] The suspended elastic filter media 531 is preferably, but not limited to, fiber balls.

[0052] By sequentially arranging a sludge collection device 2, a vortex coagulation device, a primary purification device, and a deep purification device from bottom to top within the internal space of the outer shell 1, the turbid circulating water to be treated enters from the inlet pipe 311 along the tangential direction of the inlet guide tube 31. This causes the water flow inside the inlet guide tube 31 to form a vortex, thereby centrifugally separating and removing some of the coarse particles of solids in the turbid circulating water to be treated within the inlet guide tube 31. These particles then fall into the sludge collection device 2 below under gravity. The portion of solids that are not separated and removed in the inlet guide tube 31 flows upward along the cavity between the inlet guide tube 31 and the inner wall of the outer shell 1 after passing over the guide ring plate 32. After passing through the primary purification device... The system is used for filtration to further intercept sludge in the circulating water. After filtration and sedimentation by the primary purification device, the circulating water undergoes deep filtration through the suspended elastic filter media layer 53 formed by the elastic suspended filter media 531. This removes residual suspended solids, grease, tiny flocs carried in the effluent, and flocs generated by coagulation, thus achieving deep water purification. It effectively avoids the presence of floating solids, grease, and flocs in the effluent, making it suitable for treatment processes with high water quality requirements without the need for additional filtration devices. Furthermore, once the elastic suspended filter media is saturated with contaminants, it falls to the bottom of the filter media hopper structure under gravity, allowing for dynamic recycling in conjunction with the elastic filter media regeneration device.

[0053] As a preferred embodiment of the present invention, it further includes an elastic filter media regeneration device; the elastic filter media regeneration device includes a filter media regenerator cylinder 61, a fluidization device 62, a cleaning device, and a lifting device 64 arranged sequentially from bottom to top within the internal space of the filter media regenerator cylinder 61; wherein...

[0054] The fluidization device 62 includes a water distribution chamber 621, a rectifier filter plate 622 disposed at the top of the water distribution chamber 621, a connecting pipe 623 disposed at the bottom outlet of the water distribution chamber 622, and a regenerated water inlet pipe 624 and a regenerated water outlet pipe 625 respectively connected to the two side walls of the connecting pipe 623; a filter media guide pipe 611 is disposed on the side wall of the filter media regenerator cylinder 61 above the rectifier filter plate 622; the filter media guide pipe 611 is connected to the bottom of the filter media hopper structure;

[0055] The cleaning device includes a side cleaning water distribution chamber 631 surrounding the filter media regenerator cylinder 61, a side cleaning nozzle 632 disposed inside the side cleaning water distribution chamber 631, a side cleaning water pipe 633 connected to the outer wall of the side cleaning water distribution chamber 631, and a stirring mechanism 634 disposed inside the filter media regenerator cylinder 61; the spraying end of the side cleaning nozzle 632 is disposed on the inner wall of the filter media regenerator cylinder 61.

[0056] The lifting device 64 includes a spiral lifting tube 641, a screw 642 disposed inside the spiral lifting tube 641, a lifting motor 643 connected to the top of the screw 642, a collection port 644 disposed on the bottom side wall of the spiral lifting tube 641, and an extrusion pipe 645 communicating with the upper side wall of the spiral lifting tube 641; the collection end of the collection port 644 is disposed on the inner wall of the filter media regenerator cylinder 61, and the discharge end of the extrusion pipe 645 is disposed inside the filter media hopper structure.

[0057] The rectifier filter plate 622 has a mesh structure, and the contaminated filter media is intercepted at the top by the rectifier filter plate 622 after entering the filter media regenerator cylinder 61.

[0058] Through the above-described structural design of the elastic filter media regeneration device, after the elastic suspended filter media 531 becomes saturated with contaminants, it is fed into the filter media regenerator cylinder 61 by gravity through the filter media guide pipe 611. The filter media is then fluidized and regenerated through washing, achieving dynamic recycling of the elastic suspended filter media 531 without affecting the normal operation of the process. Compared with traditional filter media regeneration devices, this design saves backwashing water, and the bottom-up water distribution method ensures more uniform water distribution without dead zones.

[0059] In another embodiment of the present invention, the elastic filter media regeneration device may not be provided. In this case, new elastic suspended filter media 531 can be introduced through the extrusion pipe 645, and the saturated elastic suspended filter media 531 can be periodically removed through the bottom of the filter media hopper structure. Figure 3 As shown.

[0060] As a preferred embodiment of the present invention, a regenerated water drain pipe 626 is provided on the upper side wall of the filter media regenerator cylinder 61; a grid 6261 is provided at the water inlet end of the regenerated water drain pipe 626; and a regenerated water drain valve 6262 is provided on the regenerated water drain pipe 626.

[0061] The reclaimed water is discharged more quickly by setting up a reclaimed water drain pipe 626, and a grid 6261 is set around the outlet of the reclaimed water drain pipe 626 to prevent the loss of the reclaimed suspended elastic filter media 531. The reclaimed water drain valve 6262 is preferably, but not limited to, an electrically controlled valve.

[0062] As a preferred embodiment of the present invention, the stirring mechanism 634 includes a stirring shaft 6341 and a stirring paddle 6342 disposed at the lower part of the stirring shaft 6341; a stirring motor 6343 is connected to the top end of the stirring shaft 6341; the stirring motor 6343 is disposed on the outer side of the top end of the filter media regenerator cylinder 61; and or,

[0063] A filter media discharge valve 6111 is provided on the filter media guide pipe 611; and / or,

[0064] A reclaimed water inlet valve 6241 is installed on the reclaimed water inlet pipe 624; and / or,

[0065] A reclaimed water submersible drain valve 6251 is provided on the reclaimed water submersible drain pipe 625; and / or,

[0066] A side cleaning water valve 6331 is installed on the side cleaning water pipe 633.

[0067] It should be noted that the stirring mechanism 634 with the above-described structure can achieve electrically controlled stirring, which is the preferred solution of the present invention. Other devices with stirring function can also be used instead, and the present invention does not make any special limitation on this.

[0068] In addition, the filter media discharge valve 6111, the regenerated water inlet valve 6241, the regenerated water drain valve 6251, and the side cleaning water valve 6331 in this invention are preferably, but not limited to, electrically controlled valves for easy operation.

[0069] As a preferred embodiment of the present invention, the outer shell 1 is a pressure-bearing and sealed space structure formed by the shell 11 and the end cap 12 disposed at the top of the shell 11; the water outlet pipe 551 is disposed at the top of the end cap 12; and an automatic water outlet valve 5511 is provided on the water outlet pipe 551.

[0070] The housing 11 and the end cap 12 are detachably connected, and a pressure-bearing sealed space structure can be formed inside by adding a sealing ring or other sealing structure at the connection.

[0071] It should be noted that the automatic water outlet valve 5511 is preferably, but not limited to, an electrically controlled valve, for ease of operation.

[0072] As a preferred embodiment of the present invention, the sludge collection device 2 is a sludge hopper with an inverted conical structure; an automatic sludge discharge pipe 21 is provided on the lower side wall of the sludge hopper; the top opening of the sludge hopper is fitted to the inner wall of the outer shell 1; the outlet of the automatic sludge discharge pipe 21 passes through the side wall of the outer shell 1 and is located outside the outer shell 1; an automatic sludge discharge valve 211 is provided on the automatic sludge discharge pipe 21.

[0073] It should be noted that the present invention preferably, but is not limited to, uses an inverted conical sludge hopper as the sludge collection device 2, and discharges sludge periodically through an automatic sludge discharge pipe 21. The automatic sludge discharge valve 211 is preferably, but not limited to, an electrically controlled valve. The top opening of the sludge hopper is fitted to the inner wall of the outer shell 1 to ensure that the sludge falls into the sludge hopper.

[0074] As a preferred embodiment of the present invention, the outer side wall of the water inlet guide tube 31 is fixed to the inner side wall of the outer shell 1 by a fixing connector 312; the lower end of the guide ring plate 32 is inclined inward; and / or, the water inlet end of the water inlet pipe 311 is located outside the outer shell 1; and / or, an automatic water inlet valve 3111 is provided on the water inlet pipe 311.

[0075] It should be noted that the inward tilt angle of the lower end of the guide ring plate 32 can be obtained according to actual needs or experimental verification, and the present invention does not impose any particular limitation on this. The automatic water inlet valve 3111 is preferably, but not limited to, an electrically controlled valve. The turbid circulating water to be treated entering through the water inlet pipe 311 can be pre-added with a reagent, and the swirling flow in the water inlet guide cylinder 31 allows the reagent to be fully mixed to form flocs.

[0076] As a preferred embodiment of the present invention, the packing sedimentation separation layer 41 includes a packing support 411 and an inclined tube packing 412 disposed on the top of the packing support 411; the outer peripheral end of the packing support 411 is disposed in contact with the inner side wall of the outer shell 1; and / or, the bottom end of the sludge return guide cone 42 is flush with the top end of the inlet guide cylinder 31.

[0077] The inclined tube packing 412 filters the turbid circulating water, and the pre-purified turbid circulating water enters the sedimentation outlet zone 43. The sludge intercepted by the inclined tube packing 412 falls from the inclined tube and returns to the cavity between the inlet guide tube 31 and the shell 11 under the guidance of the sludge return guide cone 42. The packing support 411 is preferably, but not limited to, welded and fixed inside the shell to support the inclined tube packing 412.

[0078] As a preferred embodiment of the present invention, the filter hopper structure includes a material collection hopper 511 and a filter cloth water screen plate 512 arranged around the top opening of the material collection hopper 511; the upper end of the filter cloth water screen plate 512 is attached to the inner side wall of the outer shell 1; and / or, a filter cap 521 is provided on the filter plate 52; and uniform water-permeable slits are opened on the filter cap 52.

[0079] It should be noted that the filter plate 52 is a water filter plate, meaning that water can pass through but solid impurities cannot. The above function is preferably achieved by setting the filter cap 521.

[0080] The turbid circulating water purification method provided by this invention uses the floating bed pressurized turbid circulating water purification device described above to purify the turbid circulating water, and includes the following steps:

[0081] Step S1: The turbid circulating water to be treated enters the inlet guide tube 31 through the inlet pipe 311 along the tangential direction of the inlet guide tube 31, causing the water flow in the inlet guide tube 31 to form a swirling flow.

[0082] Step S2: Under the action of swirling flow, some coarse solid particles in the turbid circulating water to be treated are separated by centrifugation and fall from the bottom of the inlet guide tube 31 into the sludge collection device 2; the remaining turbid circulating water to be treated in the inlet guide tube 31 flows upward along the cavity between the inlet guide tube 31 and the inner wall of the outer shell 1 after passing over the guide ring plate 32 and enters the packing sedimentation separation layer 41.

[0083] Step S3: The sludge in the turbid circulating water to be treated entering the packing sedimentation separation layer 41 is intercepted by the packing sedimentation separation layer 41 and falls from the packing of the packing sedimentation separation layer 41. It is then guided back to the cavity between the inlet guide tube 31 and the inner wall of the outer shell 1 through the sludge return guide cone 42, and settles downward into the sludge collection device 2. The part that is not intercepted by the packing sedimentation separation layer 41 enters the sedimentation outlet zone 43 as the preliminary purified turbid circulating water.

[0084] Step S4: The pre-purified turbid circulating water continues to flow upward in the sedimentation outlet zone 43, enters the interior of the filter hopper structure through the sieve plate structure on the side wall of the filter hopper structure, and comes into contact with the suspended elastic filter layer 53. The fine iron oxide suspended particles and oil in the pre-purified turbid circulating water are adsorbed and filtered by the suspended filter layer 53, so that the pre-purified turbid circulating water is deeply purified.

[0085] In step S5, after the suspended elastic filter media in the suspended elastic filter media layer 53 is saturated with fine iron oxide suspended particles and oil contaminants, its specific gravity gradually increases to more than 1. The suspended elastic filter media with a specific gravity greater than 1 overcomes buoyancy and the support of the rising water flow and sinks to the filter media guide zone 54. It is intercepted by the side wall of the filter media hopper structure and pushed to the bottom of the filter media hopper structure. The deeply purified water obtained from the deep purification enters the filtered clear water zone 55 through the filter plate 52 and is discharged through the outlet pipe 551.

[0086] Specifically, the turbid circulating water to be treated enters the inlet guide cylinder 31 tangentially from the inlet pipe 311 and flows downwards along the cylinder wall to fill the inlet guide cylinder 31, causing the water flow inside the inlet guide cylinder 31 to form a swirling flow. The inlet guide cylinder 31 is preferably cylindrical. After the turbid circulating water passes over the guide ring plate 32 at the bottom of the inlet guide cylinder 31, it flows upwards along the cavity between the inlet guide cylinder 31 and the shell 11. The shell 11 is preferably cylindrical. One... Some coarse solid particles are centrifuged and separated in the inlet guide tube 31 and fall into the sludge hopper. The other part flows upward and is intercepted by the inclined tube packing set above the packing support 411 to achieve preliminary purification of the turbid circulating water and enter the sedimentation outlet zone 43. The sludge intercepted by the packing falls from the inclined tube. The sludge falling from the inclined tube returns to the cavity between the inlet guide tube 31 and the shell 11 under the guidance of the sludge return guide cone 42 and settles downward into the bottom sludge hopper. The initially purified turbid circulating water continues to flow upward from the sedimentation outlet zone 43, passing through the filter cloth screen plate 512 and contacting the suspended elastic filter media. The specific gravity of the suspended elastic filter media is lower than that of water, so the suspended elastic filter media floats to the bottom of the filter plate 52 to form a suspended filter media layer 53. Fine iron oxide suspended particles and grease in the water are adsorbed and filtered by the suspended filter media layer to achieve deep purification. The purified water flows into the filtered clear water zone 55 from the filter cap 521 that runs through the filter plate 52. The filter cap 521 has uniform water-permeable slits. The filtered water flows out from the water outlet pipe 551 set at the top of the end cap 12. The end cap 12 and the shell 11 enclose a pressure-bearing and sealed space. An automatic water outlet valve 5511 is provided on the water outlet pipe 551.After the suspended elastic filter media becomes saturated with fine iron oxide suspended particles and grease contaminants, the specific gravity of the packing gradually increases to greater than 1. Overcoming buoyancy and the upward pressure of the rising water flow, the suspended elastic filter media sinks to the filter media guide zone 54, where it is intercepted by the filter cloth screen plate 512 and pushed into the filter media collection hopper 511. The filter media collection hopper 511 is connected to the filter media regenerator through a smooth filter media guide pipe 611. A filter media discharge valve 6111 is installed between the filter media guide pipe 611 and the filter media regenerator. The contaminated filter media is periodically discharged into the filter media regenerator through the discharge valve, and the filter media is then re-processed. The bottom of the regenerator is equipped with a reclaimed water inlet pipe 624 and a reclaimed water inlet valve 6241. The reclaimed water inlet pipe 624 is connected to the water distribution chamber 621 and the reclaimed water drain pipe 625 via a connecting pipe 623. The reclaimed water drain pipe 625 is equipped with a reclaimed water drain valve 6251. The top of the water distribution chamber 621 is equipped with a rectifier filter plate 622. The rectifier filter plate 622 has a mesh structure. The contaminated filter media enters the filter media regenerator cylinder 61 and is intercepted above by the rectifier plate 622. After the reclaimed water is injected into the filter media regenerator cylinder, it fluidizes the contaminated suspended elastic filter media and suspends it. The elastic filter media is agitated at high speed by a stirring paddle 6342, which is mounted on a stirring shaft 6341 and driven by a stirring motor 6343. A side cleaning water distribution chamber 631 is provided on the side of the filter media regenerator cylinder 61. Multiple sets of nozzles 632 are arranged in the water distribution chamber facing the inside of the filter media regenerator cylinder 61. The side cleaning water chamber 631 is injected with cleaning water controlled by a side cleaning valve 6331 through a side backwash water pipe 633. Through the action of the side cleaning water and the stirring paddle 6342, the fine iron oxide suspended particles and grease adsorbed on the surface of the contaminated filter media are separated. The regenerated filter media is discharged through the regenerated water upper drain pipe 626 controlled by the regenerated water upper drain valve 6262 and the regenerated water lower drain pipe 625 controlled by the regenerated water lower drain valve 6251. The regenerated filter media with a specific gravity of less than 1 floats back to the top of the filter media regenerator cylinder 61. A grid 6261 is installed around the opening of the regenerated water upper drain pipe 626 to prevent the loss of the regenerated suspended elastic filter media. The suspended elastic filter media enters the collection port 644 and is lifted by the screw 642 set in the spiral lift pipe 641 to the top extrusion pipe 645 and returns to the filter media layer through the discharge port. The sludge settled in the sludge hopper is automatically discharged through the sludge discharge pipe 21 controlled by the automatic sludge discharge valve 211.

[0087] As can be seen from the above specific embodiments, the floating bed pressurized turbid circulating water purification device and purification method provided by the present invention, by sequentially arranging a sludge collection device, a vortex coagulation device, a primary purification device, and a deep purification device from bottom to top in the internal space of the outer shell, allows the turbid circulating water to be treated to enter from the inlet pipe along the tangential direction of the inlet guide tube, causing the water flow inside the inlet guide tube to form a vortex, thereby centrifugally separating and removing some of the coarse particle solids in the turbid circulating water to be treated inside the inlet guide tube, and falling into the sludge collection device below by gravity; the part that is not separated and removed in the inlet guide tube flips over the guide ring plate and flows along the cavity between the inlet guide tube and the inner wall of the outer shell. The water flows upwards and is filtered by a primary purification device to further intercept sludge in the circulating water. After sedimentation by the primary purification device, the circulating water undergoes deep filtration through a suspended elastic filter media layer, removing residual suspended solids, grease, tiny flocs carried in the effluent, and flocs generated by coagulation, thus achieving deep water purification. This effectively avoids the presence of floating solids, grease, and flocs in the effluent, making it suitable for treatment processes with high water quality requirements without the need for additional filtration devices. Furthermore, once the elastic suspended filter media is saturated with contaminants, it falls to the bottom of the filter media hopper structure under gravity, allowing for dynamic recycling in conjunction with an elastic filter media regeneration device.

[0088] The floating bed pressurized turbid water purification device and method according to the present invention have been described above by way of example with reference to the accompanying drawings. However, those skilled in the art should understand that various modifications can be made to the floating bed pressurized turbid water purification device and method proposed in the present invention without departing from the scope of the invention. Therefore, the scope of protection of the present invention should be determined by the contents of the appended claims.

Claims

1. A floating bed pressurized turbid water purification device, characterized in that, The sewage treatment device comprises a shell, a sludge collecting device, a cyclone coagulation device, a primary purification device and a deep purification device which are sequentially arranged in the internal space of the shell from bottom to top. The cyclone coagulation device comprises a water inlet guide cylinder and a guide ring plate arranged at the bottom port of the water inlet guide cylinder. The primary purification device comprises a filler sedimentation separation layer and a sludge backflow guide cone arranged below the filler sedimentation separation layer. The deep purification device comprises a filter hopper structure with a sieve plate structure arranged at the side wall of the sedimentation effluent area, a filter plate arranged above the filter hopper structure and a suspended elastic filter material layer arranged at the bottom of the filter plate. The shell is a pressure-bearing sealed space structure formed by a shell body and a head arranged at the top end of the shell body. The sludge collecting device is a mud bucket with an inverted conical body structure, and the top opening of the mud bucket is arranged in close contact with the inner wall of the shell. The outer side wall of the water inlet guide cylinder is fixed to the inner side wall of the shell by a fixed connecting piece, and the lower end of the guide ring plate is inwardly inclined. The bottom end of the sludge backflow guide cone is flush with the top end of the water inlet guide cylinder.

2. The floating bed pressure turbid water purification device according to claim 1, characterized in that, The elastic filter material regeneration device comprises a filter material regenerator cylinder, a fluidization device, a cleaning device and a lifting device which are sequentially arranged in the internal space of the filter material regenerator cylinder from bottom to top. The fluidization device comprises a water distribution chamber, a flow regulation filter plate arranged at the top end of the water distribution chamber, a communication pipe arranged at the bottom outlet of the water distribution chamber, a regeneration water inlet pipe and a regeneration water lower discharge pipe connected to the two side walls of the communication pipe respectively, a filter material guide pipe arranged on the side wall of the filter material regenerator cylinder above the flow regulation filter plate, and the filter material guide pipe is connected to the bottom of the filter hopper structure. The cleaning device comprises a side cleaning water distribution chamber arranged outside the filter material regenerator cylinder, a side cleaning nozzle arranged in the side cleaning water distribution chamber, a side cleaning water pipe connected to the outer side wall of the side cleaning water distribution chamber and a stirring mechanism arranged in the filter material regenerator cylinder, and the water spraying end of the side cleaning nozzle is arranged on the inner wall of the filter material regenerator cylinder. The lifting device comprises a screw lifting pipe, a screw rod arranged inside the screw lifting pipe, a lifting motor connected with the top end of the screw rod, a material collecting port arranged on the bottom side wall of the screw lifting pipe, and an extrusion pipe communicated with the upper side wall of the screw lifting pipe; the material collecting end of the material collecting port is arranged on the inner wall of the filter material regenerator cylinder body, and the discharge end of the extrusion pipe is arranged inside the filter hopper structure.

3. The floating bed pressure type turbid circulating water purification device according to claim 2, characterized in that, an upper regeneration water discharge pipe is arranged on the upper side wall of the filter material regenerator cylinder body; a grille is arranged on the water inlet end of the upper regeneration water discharge pipe; a regeneration water discharge valve is arranged on the upper regeneration water discharge pipe.

4. The floating bed pressure type turbid circulating water purification device according to claim 2, characterized in that, the stirring mechanism comprises a stirring shaft and a stirring paddle arranged on the lower part of the stirring shaft; a stirring motor is connected with the top end of the stirring shaft; the stirring motor is arranged on the top end outside of the filter material regenerator cylinder body; and / or, a filter material discharge valve is arranged on the filter material guide pipe; and / or, a regeneration water inlet valve is arranged on the regeneration water inlet pipe; and / or, a regeneration water outlet valve is arranged on the lower regeneration water discharge pipe; and / or, a side cleaning water valve is arranged on the side cleaning water pipe.

5. The floating bed pressure type turbid circulating water purification device according to claim 1, characterized in that, the water outlet pipe is arranged on the top of the head; an automatic water outlet valve is arranged on the water outlet pipe.

6. The floating bed pressure type turbid circulating water purification device according to claim 1, characterized in that, an automatic sludge discharge pipe is arranged on the lower side wall of the sludge hopper; the discharge outlet of the automatic sludge discharge pipe is arranged outside the shell through the shell side wall; an automatic sludge discharge valve is arranged on the automatic sludge discharge pipe.

7. The floating bed pressure type turbid circulating water purification device according to claim 1, characterized in that, the water inlet end of the water inlet pipe is arranged outside the shell; and / or, an automatic water inlet valve is arranged on the water inlet pipe.

8. The floating bed pressure type turbid circulating water purification device according to claim 1, characterized in that, the filler sedimentation separation layer comprises a filler support and an inclined tube filler arranged on the top of the filler support; the outer peripheral end of the filler support is arranged in close contact with the inner side wall of the shell.

9. The floating bed pressure type turbid circulating water purification device according to claim 1, characterized in that, the filter hopper structure comprises a material collecting hopper and a filter cloth water screen plate arranged around the top opening of the material collecting hopper; the upper end of the filter cloth water screen plate is arranged in close contact with the inner side wall of the shell; and / or, a filter cap is arranged on the filter plate; uniform water permeable slits are formed on the filter cap.

10. A method of purifying a turbid aqueous solution, comprising: The floating bed pressure type turbid circulating water purification device according to any one of claims 1-9 is used to purify turbid circulating water, comprising the following steps: Step S1, the turbid circulating water to be treated enters the water inlet guide cylinder through the water inlet pipe along the tangent direction of the water inlet guide cylinder, driving the water flow in the water inlet guide cylinder to form a cyclone; Step S2, under the action of the cyclone, part of the coarse particles in the turbid circulating water to be treated are centrifugally separated and then fall from the bottom of the water inlet guide cylinder into the sludge collecting device; The remaining turbid circulating water to be treated in the water inlet guide cylinder flows upward along the cavity between the water inlet guide cylinder and the inner side wall of the shell into the filler sedimentation separation layer after turning over the guide ring plate; Step S3, the sludge in the turbid circulating water to be treated entering the filler sedimentation separation layer is intercepted by the filler sedimentation separation layer and falls from the filler, is guided by the sludge backflow guide cone into the cavity between the water inlet guide cylinder and the inner side wall of the shell, and then falls downward and is deposited into the sludge collecting device. The part not intercepted by the filler sedimentation separation layer is used as the preliminary purified turbid circulating water and enters the sedimentation water outlet area; Step S4, the preliminary purified turbid circulating water continues to flow upward in the sedimentation water outlet area, enters the filter hopper structure through the sieve plate structure on the side wall of the filter hopper structure, and contacts the suspended elastic filter material layer. The fine suspended iron oxide particles and oil in the preliminary purified turbid circulating water are adsorbed and filtered by the suspended elastic filter material layer, so that the preliminary purified turbid circulating water is deeply purified; Step S5, when the suspended elastic filter material in the suspended elastic filter material layer is saturated by the fine suspended iron oxide particles and oil, the specific gravity of the suspended elastic filter material gradually increases to be greater than 1. The suspended elastic filter material with a specific gravity greater than 1 overcomes the floating force and the top support of the upward flow and sinks to the filter material guide area. The suspended elastic filter material is intercepted by the side wall of the filter hopper structure and is pushed to the inside bottom end of the filter hopper structure. The deeply purified water obtained by deep purification passes through the filter plate into the filtered clear water area and is discharged through the water outlet pipe.

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