Fixed bed pressure-resistant turbid circulating water purification device and purification method

Abstract

The application provides a fixed 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 cyclone coagulation device arranged in the shell, a primary purification device and a deep filtration device. 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 water inlet guide cylinder in the tangent direction. The primary purification device comprises a sludge backflow guide cone and a filler sedimentation separation layer arranged above the sludge backflow guide cone. A sedimentation effluent area is formed above the filler sedimentation separation layer. A water collecting mechanism is arranged in the sedimentation effluent area, and an effluent pipe is connected to the water collecting outlet of the water collecting mechanism. The deep filtration device comprises a filter cloth water distribution mechanism, a filter material layer structure and a filter plate arranged in the filtration area and connected to the effluent pipe. The application can solve the problem of insufficient flocculation reaction, suspended solids, grease and flocculation in the effluent in the prior art.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of turbid circulating water treatment, and more particularly to a fixed-bed pressure-bearing type turbid circulating water purification device and purification method. BACKGROUND

[0002] The turbid circulating water treatment process in the steel metallurgical industry is generally based on physicochemical methods, including coagulation, flocculation, clarification, sedimentation and other physical and chemical treatment methods. Therefore, technical innovation around coagulation, flocculation, clarification and sedimentation, and development of high-efficiency flocculation and sedimentation physicochemical treatment technology are the key to improving the efficiency of wastewater physicochemical treatment, and are also the difficulty in current research.

[0003] The traditional water treatment process places coagulation, flocculation, clarification and sedimentation in different process equipment or structures. During the coagulation reaction of the reagent, mechanical stirring is generally provided, which requires the consumption of a certain amount of energy. In terms of technical measures to improve flocculation and clarification effects, whether internal sludge backflow or external load backflow requires the addition of sludge backflow equipment and the consumption of a certain amount of energy. The wastewater is lifted once into the traditional atmospheric physicochemical treatment device, and the effluent after purification has been depressurized, so that the residual energy of the primary lifting pump cannot be fully utilized. The effluent of the atmospheric physicochemical purification device needs to flow into a water suction pool, and then is lifted twice by a pump set to enter a cooling tower or subsequent treatment equipment, which requires additional electrical energy for the second lifting.

[0004] Based on the problems of large land occupation, large power consumption and high operating cost in the traditional water treatment process, the present unit previously invented a pressure-bearing integrated metallurgical wastewater purification technology, which has been widely applied in the steel industry. The main idea of this technology is to complete the whole process of turbid circulating water purification in a closed pressure-bearing structure, and the effluent of the device is directly sent to the cooling tower for cooling. Compared with the traditional water treatment process, the technology reduces the secondary lifting, reduces the land occupation and investment of the project, significantly reduces the operating power consumption, and reduces the operating cost of the water treatment facility. The technology integrates flocculation and sedimentation technology in a single device, and realizes the internal sludge backflow and utilization, improves the reagent utilization rate, improves the flocculation and sedimentation effect, greatly improves the effluent quality compared with the traditional process, realizes the high degree of water treatment facility development, and thus reduces the land occupation. On the basis of this technology, various pressure-bearing integrated metallurgical wastewater purification devices of different styles have been developed in the market, but the basic principle has not changed.

[0005] For example, patent application No. CN201010605762.6 discloses a pressure type integrated metallurgical sewage purification treatment device. The water quality can be preliminarily purified after coagulation and sedimentation, but a part of suspended particles and oil residues are still in the water. The technical solution provided by the patent is essentially a device combining flocculation reactor and sedimentation. The flocculation reaction process depends on hydraulic mixing, and the mixing strength is related to the water inflow and flow rate. Therefore, the flocculation effect varies, affecting the final sedimentation effect. When the water inflow of the equipment changes greatly, the sludge deposited in the inclined pipe may be carried out of the equipment by the water flow, causing deposition and blockage in the internal nozzle of the water using equipment. In addition, when the equipment performs sludge discharge, the water outflow of other equipment connected in parallel returns to the sludge discharge equipment, impacting the sludge at the bottom of the inclined pipe filler and dispersing the sludge. When the equipment stops discharging sludge and starts water inflow again, the dispersed sludge is carried out of the equipment by the water flow.

[0006] For another example, patent application No. CN201820993898.0 discloses a pressure type purification device. The water quality can be preliminarily purified after coagulation and sedimentation, but a part of suspended particles and oil residues are still in the water. The flocculation reaction zone has weak power, and a large amount of reagents need to be added. The reagents that have not fully reacted cause post-flocculation problems, affecting the water quality of the equipment outflow. When the water inflow of the equipment changes greatly, the sludge deposited in the inclined plate filler may be carried out of the equipment by the water flow, causing deposition and blockage in the internal nozzle of the water using equipment. The inclined plate sedimentation has a water quality purification limit under certain hydraulic load and reagent dosage conditions. When the water quality requirement is high, additional filtration facilities need to be added for further purification.

[0007] In summary, the existing pressure type integrated metallurgical sewage purification technology generally has the problems of insufficient flocculation reaction, water outflow still carrying a certain amount of suspended matter and oil, and carrying flocculation body. When the water quality requirement is high, additional filtration devices need to be added. SUMMARY

[0008] In view of the above problems, the purpose of the present application is to provide a fixed bed pressure type turbid circulating water purification device and purification method to solve the problems of insufficient flocculation reaction, water outflow still carrying a certain amount of suspended matter and oil, and carrying flocculation body in the existing pressure type integrated metallurgical sewage purification technology in the prior art. When the water quality requirement is high, additional filtration devices need to be added.

[0009] The present application provides a fixed bed pressure type turbid circulating water purification device, which comprises a shell, a cyclone coagulation device, a primary purification device and a deep filtration device arranged in the internal space of the shell.

[0010] In the vertical direction, the interior space of the shell is divided into a sedimentation zone on the upper side and a filtration zone on the lower side;

[0011] The cyclone coagulation device comprises a water inlet guide cylinder arranged in the sedimentation zone and a guide ring plate arranged at the bottom end of the water inlet guide cylinder; a water inlet pipe is connected to the tangent direction of the water inlet guide cylinder; a sludge collecting device is arranged at the bottom end of the guide ring plate;

[0012] The primary purification device comprises a sludge backflow guide cone arranged with the top end pointing upwards and a filler sedimentation separation layer arranged above the sludge backflow guide cone; the bottom end of the sludge backflow guide cone is arranged at the top end of the water inlet guide cylinder; a sedimentation effluent zone is formed above the filler sedimentation separation layer; a water collecting mechanism is arranged in the sedimentation effluent zone, and an effluent pipe is connected to the water collecting outlet of the water collecting mechanism;

[0013] The deep filtration device comprises a filtration water distribution mechanism arranged in the filtration zone, a filter material layer structure arranged below the filtration water distribution mechanism, and a filter plate arranged at the bottom end of the filter material layer structure; the water inlet of the filtration water distribution mechanism is connected to the water outlet end of the effluent pipe; a water distribution zone is formed between the lower side of the filtration water distribution mechanism and the upper side of the filter material layer structure; a clear water chamber is formed below the filter plate; a filtered water production valve is arranged in the clear water chamber.

[0014] In addition, preferably, the water inlet of the filtration water distribution mechanism is connected to the water outlet end of the effluent pipe through a tee pipe; the upper port of the tee pipe is connected to the water outlet end of the effluent pipe, one side port of the tee pipe is connected to the filtration water distribution mechanism, and a backwashing drainage valve is arranged at the other side port of the tee pipe; a filtration water inlet valve is arranged at the upper port of the tee pipe; an isolation valve is arranged at the port where the tee pipe is connected to the filtration water distribution mechanism.

[0015] In addition, preferably, the outer side wall of the water inlet guide cylinder is fixed to the inner side wall of the shell through a fixed connecting piece; the lower end of the guide ring plate is arranged with an inward inclination; and / or, 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.

[0016] In addition, preferably, the sludge collecting device is a sludge hopper with an inverted conical body structure; an automatic sludge discharge pipe is arranged on the lower side wall of the sludge hopper; the top opening of the sludge hopper is arranged in close contact with the inner wall of the shell; the discharge outlet of the automatic sludge discharge pipe is arranged outside the shell through the side wall of the shell; and an automatic sludge discharge valve is arranged on the automatic sludge discharge pipe.

[0017] In addition, preferably, the filler sedimentation separation layer comprises a filler support and a slanted tube filler arranged on top of the filler support; the outer peripheral end of the filler support is arranged in abutment with the inner side wall of the shell; and / or the bottom end of the sludge backflow flow guide cone is flush with the top end of the water inlet flow guide cylinder.

[0018] In addition, preferably, the water collecting mechanism comprises a water collecting pipe arranged transversely and sealed at both ends, and a water collecting head arranged on the bottom end of the water collecting pipe; the water collecting outlet is arranged on the top of the water collecting pipe; the water outlet end of the water outlet pipe is arranged outside the shell through the top end of the shell; and / or the filter cloth water distribution mechanism comprises a filter cloth water distribution pipe arranged transversely in the filter area, and a water distribution nozzle arranged on the bottom end of the filter cloth water distribution pipe; one end of the filter cloth water distribution pipe is arranged in abutment, and the other end is provided with the water outlet.

[0019] In addition, preferably, the filter material layer structure comprises a support layer arranged on the top end of the filter plate, and a filter material layer arranged on the top end of the support layer; and / or a filter water cap is arranged on the bottom end of the filter plate; uniform water permeable gaps are formed on the filter water cap.

[0020] In addition, preferably, a positive first drainage valve is arranged in the clean water chamber; the positive first drainage valve and the filtered water production valve are arranged on the two sides of the clean water chamber, respectively.

[0021] In addition, preferably, the sedimentation area and the filter area are separated by a partition plate; the outer peripheral end of the partition plate is fixed on the inner side wall of the shell.

[0022] The present application provides a turbid ring water purification method, which adopts the fixed bed pressure type turbid ring water purification device as described above to purify turbid ring water, comprising the following steps:

[0023] Step S1, the turbid ring water to be treated enters the water inlet flow guide cylinder along the tangent direction of the water inlet flow guide cylinder through the water inlet pipe, driving the water flow in the water inlet flow guide cylinder to form a cyclone;

[0024] Step S2, under the action of the cyclone, part of the coarse particle solids in the turbid ring water to be treated are centrifugally separated and fall into the sludge collecting device from the bottom of the water inlet flow guide cylinder; the remaining turbid ring water to be treated in the water inlet flow guide cylinder flows upwards along the cavity between the water inlet flow guide cylinder and the inner side wall of the shell after turning over the flow guide ring plate, and enters the filler sedimentation separation layer;

[0025] Step S3, the sludge in the to-be-processed turbid circulating water entering the filler sedimentation separation layer is intercepted by the filler sedimentation separation layer and falls from the filler of the filler sedimentation separation layer, is guided back to the cavity between the water inlet guide cylinder and the inner side wall of the shell through the sludge backflow guide cone, and is precipitated downward into the sludge collecting device, and the part not intercepted by the filler sedimentation separation layer enters the sedimentation effluent area as the primary purified turbid circulating water;

[0026] Step S4, the primary purified turbid circulating water in the sedimentation effluent area enters the water collecting mechanism and enters the filter cloth water distribution mechanism of the filter area through the water outlet pipe.

[0027] Step S5, the primary purified turbid circulating water is distributed to the water distribution area through the filter cloth water distribution mechanism, and the deeply purified water obtained after the primary purified turbid circulating water in the water distribution area flows through the filter material layer structure enters the clear water chamber through the filter plate and is discharged through the filtered water production valve.

[0028] From the above technical solution, the fixed bed pressure type turbid circulating water purification device and the purification method provided by the application, the cyclone coagulation device and the primary purification device arranged in the sedimentation area located above the inside of the shell are used, so that the to-be-processed turbid circulating water enters along the tangent direction of the water inlet guide cylinder, drives the water flow in the water inlet guide cylinder to form a cyclone, centrifugal separates and removes part of the coarse particle solids in the to-be-processed turbid circulating water in the water inlet guide cylinder, and falls into the sludge collecting device below by the action of gravity; the part not separated and removed in the water inlet guide cylinder flows upward along the cavity between the water inlet guide cylinder and the inner wall of the shell after turning over the guide ring plate, is filtered through the primary purification device, and further intercepts the sludge in the turbid circulating water to obtain the primary purified turbid circulating water; then the primary purified turbid circulating water is transported to the filter area located below the inside of the shell through the water collecting mechanism and the water outlet pipe arranged in the sedimentation effluent area, and after the primary purified turbid circulating water entering the filter area is distributed to the water distribution area through the filter cloth water distribution mechanism, the suspended solids, the small flocs and the oil in the primary purified turbid circulating water obtained by sedimentation are intercepted in the filter material layer structure, so that the water quality is deeply purified without the need of additionally arranging a separate filter, and the fixed bed pressure type turbid circulating water purification device and the purification method are suitable for a treatment process with high water quality requirement; the deeply purified water passes through the filter plate into the clear water chamber and flows out of the filtered water production valve under pressure, so as to realize the deep purification of the water quality; and the presence of floating objects, oil and flocs in the effluent is effectively avoided.

[0029] To achieve the above and related objects, one or more aspects of the application include features that will be explained in detail below. The following description and drawings detail certain illustrative aspects of the application. These aspects are indicative, however, of only a few of the various ways in which the principles of the application can be employed. Additionally, the application is intended to encompass all such aspects and their equivalents. BRIEF DESCRIPTION OF DRAWINGS

[0030] Other objects and results of the present application will become more fully understood and appreciated by reference to the following description taken in conjunction with the accompanying drawings. In the drawings:

[0031] Figure 1 Fig. 1 is a structural schematic diagram of a fixed bed pressure-bearing turbid circulating water purification device according to an embodiment of the present application;

[0032] Figure 2 Fig. 4 is a structural schematic diagram of a shell according to an embodiment of the present application;

[0033] Figure 3 Fig. 5 is a structural schematic diagram of a filter area part according to an embodiment of the present application;

[0034] Figure 4 Fig. 6 is a flow chart of a turbid circulating water purification method according to an embodiment of the present application.

[0035] In the drawings, 1 is a shell, 11 is a sedimentation area, 12 is a filter area, 21 is a water inlet guide cylinder, 211 is a fixed connecting piece, 22 is a guide ring plate, 23 is a water inlet pipe, 231 is an automatic water inlet valve, 31 is a sludge backflow guide cone, 32 is a filler sedimentation separation layer, 321 is a filler support, 322 is an inclined pipe filler, 33 is a sedimentation water outlet area, 34 is a water collecting mechanism, 341 is a water collecting pipe, 342 is a water collecting head, 35 is a water outlet pipe, 41 is a filter cloth water distribution mechanism, 411 is a filter cloth water distribution pipe, 4111 is a water outlet, 412 is a water distribution nozzle, 42 is a filter material layer structure, 421 is a support layer, 422 is a filter material layer, 43 is a filter plate, 431 is a filter water cap, 44 is a water distribution area, 45 is a clean water chamber, 451 is a filtered water production valve, 452 is a positive first water discharge valve, 5 is a sludge collecting device, 51 is an automatic sludge discharge pipe, 511 is an automatic sludge discharge valve, 6 is a three-way pipe, 61 is a backwashing water discharge valve, 62 is a filter water inlet valve, 63 is a isolation valve, and 7 is a partition plate.

[0036] The same reference numbers in all the drawings indicate similar or corresponding features or functions. DETAILED DESCRIPTION

[0037] In the following description, for purposes of explanation and to provide a complete understanding of one or more embodiments, numerous specific details are set forth. It will be apparent, however, to one skilled in the art that these embodiments can be practiced without these specific details.

[0038] In view of the foregoing, the existing pressure-bearing integrated metallurgical sewage purification technology in the prior art has the problem of insufficient flocculation reaction, the effluent still carrying a certain amount of suspended solids, oil and flocculation body, and the need for additional filtration device when the water quality requirement is high. A fixed bed pressure-bearing turbid circulating water purification device and purification method are proposed.

[0039] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0040] In order to illustrate the fixed bed pressure turbid circulating water purification device and purification method provided by the present application, Figure 1 The structure of the fixed bed pressure turbid circulating water purification device according to the embodiment of the present application is shown. Figure 2 The structure of the shell according to the embodiment of the present application is shown. Figure 3 The structure of the filter area part according to the embodiment of the present application is shown. Figure 4 The flow of the turbid circulating water purification method according to the embodiment of the present application is shown.

[0041] As Figures 1 to 4 As shown in the drawings, the fixed bed pressure turbid circulating water purification device provided by the present application comprises a shell 1, a cyclone coagulation device, a primary purification device and a deep filtration device arranged in the internal space of the shell 1; in the vertical direction, the internal space of the shell 1 is divided into a sedimentation area 11 located at the upper part and a filter area 12 located at the lower part; the cyclone coagulation device comprises a water inlet flow guide cylinder 21 arranged in the sedimentation area 11 and a flow guide ring plate 22 arranged at the bottom end of the water inlet flow guide cylinder 21; a water inlet pipe 23 is connected in the tangential direction of the water inlet flow guide cylinder 21; a sludge collection device 5 is arranged at the bottom end of the flow guide ring plate 22; the primary purification device comprises a sludge backflow flow guide cone 31 arranged with the top pointing upwards and a filler sedimentation separation layer 32 arranged above the sludge backflow flow guide cone 31; the bottom end of the sludge backflow flow guide cone 31 is arranged at the top end of the water inlet flow guide cylinder 21; a sedimentation effluent area 33 is formed above the filler sedimentation separation layer 32; a water collecting mechanism 34 is arranged in the sedimentation effluent area 33, and an effluent pipe 35 is connected to the water collecting outlet of the water collecting mechanism 34; the deep filtration device comprises a filter cloth water distribution mechanism 41 arranged in the filter area 12, a filter material layer structure 42 arranged below the filter cloth water distribution mechanism 41 and a filter plate 43 arranged at the bottom end of the filter material layer structure 42; the water outlet of the filter cloth water distribution mechanism 41 is connected to the water outlet end of the effluent pipe 35; a water distribution area 44 is formed between the lower part of the filter cloth water distribution mechanism 41 and the upper part of the filter material layer structure 42; a clear water chamber 45 is formed below the filter plate 43; a filtered water production valve 451 is arranged in the clear water chamber 45.

[0042] The internal space of the shell 1 is a pressure-bearing closed space, and the shape thereof is preferably but not limited to a cylindrical shape. The sedimentation area 11 and the filter area 12 are separated and do not flow through each other.

[0043] The sludge collection device 5 is preferably but not limited to arranged at the bottom end of the internal space of the sedimentation area 11; the clear water chamber 45 is located at the bottom end of the internal space of the filter area 12.

[0044] The water inlet flow guide cylinder 21 is preferably but not limited to a cylindrical shape. A gap is left between the outer side wall of the water inlet flow guide cylinder 21 and the inner side wall of the shell 1 to form a cavity.

[0045] The bottom end of the sludge backflow guide cone 31 is fixed to the top end of the water inlet guide cylinder 21, so as to ensure that the intercepted sludge can be guided by the sludge backflow guide cone 31 into the cavity between the water inlet guide cylinder 21 and the shell 1.

[0046] The water outlet end of the water outlet pipe 35 penetrates the top end of the shell 1, and the gap between the water outlet pipe 35 and the shell 1 is sealed by a sealing structure or the water outlet pipe 35 is integrally arranged with the top end of the shell 1, so as to ensure that the inside of the shell 1 is a pressure-bearing closed space. The water inlet pipe 23 and the subsequent automatic sludge discharge pipe 51 and the water outlet port 4111 of the filter cloth water distribution pipe 411 are all designed in the same way, so as to ensure that the inside of the shell is a pressure-bearing closed space.

[0047] The cyclone coagulation device and the primary purification device arranged in the sedimentation area 11 above the inside of the shell 1 are used to make the turbid circulating water to be treated enter along the tangent direction of the water inlet guide cylinder 21, drive the water flow in the water inlet guide cylinder 21 to form a cyclone, thereby centrifugally separating and removing part of the coarse particle solids in the turbid circulating water to be treated in the water inlet guide cylinder 21, and falling into the sludge collecting device 5 below by gravity; the part of the turbid circulating water to be treated that is not separated and removed in the water inlet guide cylinder 21 flows upwards along the cavity between the water inlet guide cylinder 21 and the inner wall of the shell 1 after turning over the guide ring plate 22, is filtered by the primary purification device, and is further intercepted to obtain primary purified turbid circulating water; and then the primary purified turbid circulating water is transported to the filter area 12 below the inside of the shell 1 through the water collecting mechanism 34 and the water outlet pipe 35 arranged in the sedimentation water outlet area 33. After the primary purified turbid circulating water in the filter area 12 is distributed to the water distribution area 44 by the filter cloth water distribution mechanism 41, the water is used to enter the filter material layer structure 42 for deep filtration and purification by using the water outlet residual pressure, so that the suspended solids, small flocs and oil in the primary purified turbid circulating water obtained by sedimentation are intercepted by the filter material layer, and the deep purification of water quality can be realized without additionally arranging a separate filter, which is suitable for a treatment process with high water quality requirement. The water after deep purification passes through the filter plate 43 into the clear water chamber 45 and flows out of the filter water production valve 451 under pressure, so as to realize the deep purification of water quality, and effectively avoid the existence of floating matter, oil and flocs in the water outlet.

[0048] As a preferred scheme of the present application, the water outlet port of the filter cloth water distribution mechanism 41 is connected with the water outlet end of the water outlet pipe 35 through a tee pipe 6. The upper end port of the tee pipe 6 is connected with the water outlet end of the water outlet pipe 35, one side port of the tee pipe 6 is connected with the filter cloth water distribution mechanism 41, and a backwashing drain valve 61 is arranged at the other side port of the tee pipe 6. A filter water inlet valve 62 is arranged at the upper end port of the tee pipe 6, and an isolation valve 63 is arranged at the port where the tee pipe 6 is connected with the filter cloth water distribution mechanism 41.

[0049] When the filter layer structure 42 filters for a certain period of time, the filter layer is saturated with adsorption of pollutants, and the pollution interception capacity is reduced, and backwashing is needed. The backwashing water is preferably but not limited to the filtered water produced by the adjacent device, and the water produced by the adjacent device enters the clean water chamber 45 through the filter water production valve 451 of the device to be backwashed, and then flows upward through the filter plate 43 to act on the filter layer structure 42, thereby washing the filter layer to realize the relative movement and mutual friction of the filter material, so that the pollutants trapped on the surface of the filter material are washed down and taken out of the filter layer by the backwashing water, and then discharged from the filter area 12 through the backwashing drain valve 61.

[0050] It should be noted that the backwashing drain valve 61, the filter inlet valve 62 and the isolation valve 63 are preferably but not limited to electric control valves, which facilitate the control of the liquid flow direction in the three-way pipe 6.

[0051] As a preferred embodiment of the present application, the outer side wall of the water inlet flow guide cylinder 21 is fixed to the inner side wall of the shell 1 through a fixed connecting piece 211; the lower end of the flow guide ring plate 22 is inwardly inclined; and / or the water inlet end of the water inlet pipe 23 is arranged outside the shell 1; and / or an automatic water inlet valve 231 is arranged on the water inlet pipe 23.

[0052] It should be noted that the inward inclination angle of the lower end of the flow guide ring plate 22 can be obtained according to actual needs or experimental verification, and the present application does not make special limitations thereon. The automatic water inlet valve 231 is preferably but not limited to an electric control valve. The agent can be added in advance in the turbid water to be treated entering the water inlet pipe 23, and the agent is fully mixed to form a flocculation body in the water inlet flow guide cylinder 21.

[0053] As a preferred embodiment of the present application, the sludge collecting device 5 is a sludge hopper with a reverse conical body structure; an automatic sludge discharge pipe 51 is arranged on the lower side wall of the sludge hopper; the top opening of the sludge hopper is arranged in close contact with the inner wall of the shell 1; the discharge outlet of the automatic sludge discharge pipe 51 is arranged outside the shell 1 through the side wall of the shell 1; and an automatic sludge discharge valve 511 is arranged on the automatic sludge discharge pipe 51.

[0054] It should be noted that the present application preferably but not limited to uses the sludge hopper with a reverse conical body structure as the sludge collecting device 5, and the automatic sludge discharge valve 511 is preferably but not limited to an electric control valve. The top opening of the sludge hopper is arranged in close contact with the inner wall of the shell 1 to ensure that the sludge falls into the sludge hopper.

[0055] As a preferred embodiment of the present application, the filler sedimentation separation layer 32 comprises a filler support 321 and an inclined pipe filler 322 arranged on the top of the filler support 321; the outer peripheral end of the filler support 321 is arranged in close contact with the inner side wall of the shell 1; and / or the bottom end of the sludge backflow flow guide cone 31 is flush with the top end of the water inlet flow guide cylinder 21.

[0056] The inclined pipe filler 322 filters the turbid circulating water, the turbid circulating water after preliminary purification enters the sediment outflow area 33, the sludge intercepted by the inclined pipe filler 322 falls from the inclined pipe, and the sludge falling from the inclined pipe is guided by the sludge backflow guide cone 31 to re-enter the cavity between the water inlet guide cylinder 21 and the shell 1. The filler support 321 is preferably but not limited to welded to the inside of the shell 1 and is used for supporting the inclined pipe filler 322.

[0057] As a preferred scheme of the present application, the water collecting mechanism 34 comprises a water collecting pipe 341 arranged transversely and sealed at both ends and a water collecting head 342 arranged at the bottom end of the water collecting pipe 341; a water collecting outlet is arranged at the top of the water collecting pipe 341; the water outlet end of the water outlet pipe 35 is arranged outside the shell 1 through the top end of the shell 1; and / or,

[0058] The filter water distribution mechanism 41 comprises a filter water distribution pipe 411 arranged transversely in the filter area 12 and a water distribution nozzle 412 arranged at the bottom end of the filter water distribution pipe 411; one end of the filter water distribution pipe 411 is arranged to be sealed, and the other end is provided with a water outlet 4111.

[0059] Specifically, the water outlet pipe 35 is used to transport the preliminary purified turbid circulating water collected by the water collecting pipe 341 to the filter water distribution mechanism 41. The number of the water collecting head 342 and the water distribution nozzle 412 is arranged according to actual needs, and the present application does not make special limitations on this.

[0060] As a preferred scheme of the present application, the filter material layer structure 42 comprises a support layer 421 arranged at the top end of the filter plate 43 and a filter material layer 422 arranged at the top end of the support layer 421; and / or, a filter water cap 431 is arranged at the bottom end of the filter plate 43; uniform water permeable gaps are formed on the filter water cap 431.

[0061] Specifically, the support layer 421 is preferably but not limited to composed of cobblestones; and the filter material layer 422 is preferably but not limited to composed of homogeneous quartz sand. The axial end of the filter plate 43 is fixed on the inner wall of the shell 1.

[0062] It should be noted that the filter plate 43 is a water body filter plate, that is, the water body can pass through, and solid impurities cannot pass through, and the above-mentioned effect is preferably but not limited to achieved by arranging the above-mentioned filter water cap 431.

[0063] As a preferred scheme of the present application, a positive first drainage valve 452 is arranged in the clear water chamber 45; the positive first drainage valve 452 and the filtered water production valve 451 are respectively arranged on both sides of the clear water chamber 45.

[0064] The water in the initial filtration stage is discharged from the filter area 12 through the positive first drainage valve 452, and the water is normally produced through the filtered water production valve 451 after the water quality of the positive first drainage valve 452 is normal.

[0065] As a preferred scheme of the present application, the precipitation zone 11 is separated from the filtration zone 12 by a partition plate 7; the outer peripheral end of the partition plate 7 is fixed to the inner side wall of the shell 1.

[0066] The partition plate 7 is preferably but not limited to fixed to the inner side wall of the shell 1 in a welded manner to vertically separate the internal space of the shell 1 into the precipitation zone 11 located at the upper portion and the filtration zone 12 located at the lower portion.

[0067] The turbid circulating water purification method provided by the present application adopts the fixed-bed pressure type turbid circulating water purification device as described above to purify the turbid circulating water, which comprises the following steps:

[0068] Step S1, the turbid circulating water to be treated enters the water inlet guide cylinder 21 along the tangent direction of the water inlet guide cylinder 21 through the water inlet pipe 23, driving the water flow in the water inlet guide cylinder 21 to form a cyclone;

[0069] Step S2, under the action of the cyclone, part of the coarse particle solids in the turbid circulating water to be treated are centrifugally separated and fall into the sludge collecting device 5 from the bottom of the water inlet guide cylinder 21; the remaining turbid circulating water to be treated in the water inlet guide cylinder 21 flows upwards along the cavity between the water inlet guide cylinder 21 and the inner side wall of the shell 1 after turning over the guide ring plate 22 and enters the filler precipitation separation layer 32;

[0070] Step S3, the sludge in the turbid circulating water to be treated entering the filler precipitation separation layer 32 is intercepted by the filler precipitation separation layer 32 and falls from the filler of the filler precipitation separation layer 32, is guided back into the cavity between the water inlet guide cylinder 21 and the inner side wall of the shell 1 through the sludge backflow guide cone 31, and falls downwards into the sludge collecting device 4, and the part not intercepted by the filler precipitation separation layer 32 enters the precipitation water outlet zone 33 as the primary purified turbid circulating water;

[0071] Step S4, the primary purified turbid circulating water in the precipitation water outlet zone 33 enters the water collecting mechanism 34 and enters the filter water distribution mechanism 41 of the filtration zone 11 through the water outlet pipe 35;

[0072] Step S5, the primary purified turbid circulating water is distributed to the water distribution zone 44 through the filter water distribution mechanism 41, and the deep purified water obtained after the primary purified turbid circulating water in the water distribution zone 44 flows through the filter material layer structure 42 enters the clear water chamber 45 through the filter plate 43, and is discharged through the filtered water production valve 451.

[0073] Specifically, the turbid circulating water to be treated enters the water inlet guide cylinder 21 along a tangent from the water inlet pipe 23 and flows down along the cylinder wall to fill the water inlet guide cylinder 21, and drives the water in the water inlet guide cylinder 21 to form a cyclone. The water inlet guide cylinder 21 is preferably cylindrical, and the turbid circulating water flows upwards along the inside of the cavity between the water inlet guide cylinder 21 and the outer shell 1 after turning over the guide ring plate 22 at the bottom of the water inlet guide cylinder. The outer shell 1 is preferably cylindrical. A part of the coarse particulate solids in the turbid circulating water to be treated is centrifugally separated in the water inlet guide cylinder 21 and falls into the hopper, and another part is intercepted by the inclined pipe filler 322 arranged above the filler support 321 after flowing upwards, thereby realizing preliminary purification of the turbid circulating water into the sedimentation water outlet area 33. The sludge intercepted by the filler falls from the inclined pipe and, under the guidance of the sludge backflow guide cone 31, reenters the cavity between the water inlet guide cylinder 21 and the outer shell 1 and falls downwards into the hopper. The preliminarily purified turbid circulating water continues to flow upwards from the sedimentation water outlet area 33 into the water collecting head 342, enters the water collecting pipe 341 through the water collecting head 342, and flows out from the water outlet pipe 35. The water outlet of the sedimentation area 11 is guided to the filtration area 12 through the water outlet pipe 35, enters the filter water distribution pipe 411 through the filter inlet water valve 62 and the isolation valve 63, is distributed onto the filter material layer 422 in the water distribution area 44 under the action of the water distribution nozzle 412, and is filtered on the filter material layer 422, which is preferably composed of homogeneous quartz sand. The lower part of the filter material layer 422 has a support layer 421, which is preferably composed of pebbles. The support layer 421 is arranged between the filter plate 43 and the filter material layer 422. The filter plate 43 is provided with a filter cap 431. The water in the sedimentation area 11 is filtered through the filter material layer 422 to realize deep purification. The suspended solids, small flocs, and oil in the sedimentation water outlet are intercepted by the filter material layer. The purified water passes through the support layer 421 and the filter cap 431 into the clear water chamber 45 and flows out of the filter water production valve 451 under pressure. When the filter material layer 422 is filtered to a preset filtration time, backwashing can be performed. During backwashing, the filter inlet water valve 62 is closed, and the isolation valve 63, the backwashing drain valve 61, and the backwashing inlet water valve (filter water production valve 451) are opened. The backwashing water is the filtered water produced by the adjacent device, which enters the clear water chamber 45 through the filter water production valve 451 of the device to be backwashed, flows upwards through the filter cap 431 and the support layer 421, and acts on the filter material layer 422 to scour the filter material layer 422, thereby realizing relative movement and mutual friction of the filter material, wiping off the pollutants on the surface of the filter material and carrying them out of the filter material layer 422 with the backwashing water, and discharging them out of the filtration area 12 through the backwashing drain valve 61. After backwashing for 3-10 minutes (preferably 5 minutes), the backwashing drain valve 61 and the filter water production valve 451 are closed, the filter inlet water valve 62 and the normal washing drain valve 452 are opened, and the water outlet of the sedimentation area 11 reenters the filtration area 12. The water at the beginning of filtration is discharged out of the filtration area 12 through the normal washing drain valve 452. After the normal washing drain water quality is normal, the filter water production valve 451 is opened, and the backwashing drain valve 61 is closed, and the device resumes normal water production.

[0074] The preset filtration time is preferably 12 hours, and can be set according to actual needs, which is not particularly limited in the present application.

[0075] As can be seen from the above embodiments, the fixed bed pressure type turbid circulating water purification device and purification method provided by the present application, by the cyclone coagulation device and the primary purification device arranged in the sedimentation area above the inside of the shell, the turbid circulating water to be treated enters along the tangent direction of the water inlet guide cylinder, driving the water flow in the water inlet guide cylinder to form a cyclone, thereby centrifugally separating and removing part of the coarse particulate solids in the turbid circulating water to be treated in the water inlet guide cylinder, and falling into the sludge collecting device below by gravity; the part of the turbid circulating water to be treated that is not separated and removed in the water inlet guide cylinder flows upward along the cavity between the water inlet guide cylinder and the inner wall of the shell after turning over the guide ring plate, is filtered by the primary purification device, and is further intercepted to obtain primary purified turbid circulating water; and then is transported to the filtration area below the inside of the shell through the water collecting mechanism and the water outlet pipe arranged in the sedimentation water outlet area, the primary purified turbid circulating water entering the filtration area is distributed to the distribution area by the filter cloth water distribution mechanism, and then is filtered and purified by the filter material layer structure using the water outlet residual pressure, so that the suspended solids, small flocs and oil carried by the primary purified turbid circulating water obtained by sedimentation are intercepted by the filter material layer, and the deep purification of water quality can be realized without additionally setting a separate filter, which is suitable for a treatment process with high requirements for water quality; the water after deep purification passes through the filter plate into the clear water chamber, and flows out of the filtered water valve under pressure, so as to realize deep purification of water quality; and floating matter, oil and flocs in the water outlet are effectively avoided.

[0076] The fixed bed pressure type turbid circulating water purification device and purification method according to the present application are described above with reference to the accompanying drawings in an exemplary manner. However, those skilled in the art should understand that various improvements can be made to the fixed bed pressure type turbid circulating water purification device and purification method according to the present application described above without departing from the content of the present application. Therefore, the protection scope of the present application should be determined by the content of the appended claims.

Claims

1. A fixed-bed pressurized turbid water purification device, characterized in that, It includes an outer shell, a cyclone coagulation device, a pre-purification device, and a deep filtration device disposed within the space of the outer shell; the interior of the outer shell is a pressurized, sealed space. In the vertical direction, the internal space of the housing is divided into an upper sedimentation zone and a lower filtration zone; The cyclone coagulation device includes an inlet guide cylinder disposed in the sedimentation zone and a guide ring plate disposed at the bottom port of the inlet guide cylinder; a cavity is formed between the inlet guide cylinder and the inner wall of the outer shell; an inlet pipe is connected in the tangential direction of the inlet guide cylinder; and a sludge collection device is disposed at the bottom end of the guide ring plate. The primary purification device includes a sludge return guide cone with its apex facing upwards and a packing sedimentation separation layer disposed above the sludge return guide cone; the bottom end of the sludge return guide cone is disposed at the top end of the inlet guide cylinder; a sedimentation effluent zone is formed above the packing sedimentation separation layer; a water collection mechanism is disposed in the sedimentation effluent zone, and an effluent pipe is connected to the water collection outlet of the water collection mechanism. The deep filtration device includes a water distribution mechanism disposed in the filtration zone, a filter media layer structure disposed below the water distribution mechanism, and a filter plate disposed at the bottom of the filter media layer structure; the water outlet of the water distribution mechanism is connected to the water outlet end of the water outlet pipe; a water distribution zone is formed between the lower part of the water distribution mechanism and the upper part of the filter media layer structure; and a clear water chamber is formed below the filter plate. A water filter valve is installed in the clear water chamber. The outer wall of the water inlet guide tube is fixed to the inner wall of the outer shell by a fixing connector; The lower end of the flow guide ring plate is inclined inward; The sludge collection device is a sludge hopper with an inverted conical structure, and the top opening of the sludge hopper is fitted to the inner wall of the outer shell; The bottom end of the sludge return guide cone is flush with the top end of the water inlet guide cylinder.

2. The fixed-bed pressurized circulating water purification device according to claim 1, characterized in that, The water inlet of the filter water distribution mechanism is connected to the water outlet of the water outlet pipe via a T-junction. The upper port of the three-way pipe is connected to the outlet end of the outlet pipe, one side port of the three-way pipe is connected to the filter water distribution mechanism, and a backwash drain valve is provided at the other side port of the three-way pipe; a filter inlet valve is provided at the upper port of the three-way pipe; and an isolation valve is provided at the port where the three-way pipe is connected to the filter water distribution mechanism.

3. The fixed-bed pressurized circulating water purification device according to claim 1, characterized in that, The water inlet end of the water inlet pipe is located outside the outer casing; and / or, An automatic water inlet valve is installed on the water inlet pipe.

4. The fixed-bed pressurized turbid water purification device according to claim 1, characterized in that, An automatic mud discharge pipe is provided on the lower side wall of the mud hopper; The outlet of the automatic mud discharge pipe passes through the side wall of the housing and is located on the outside of the housing; An automatic sludge discharge valve is installed on the automatic sludge discharge pipe.

5. The fixed-bed pressurized circulating water purification device according to claim 1, characterized in that, The packing sedimentation separation layer includes a packing support and 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.

6. The fixed-bed pressurized circulating water purification device according to claim 1, characterized in that, The water collection mechanism includes a horizontally arranged and sealed water collection pipe and a water collection head disposed at the bottom end of the water collection pipe; the water collection outlet is disposed at the top of the water collection pipe; the water outlet end of the water outlet pipe passes through the top end of the housing and is disposed outside the housing; and / or, The water distribution mechanism includes a water distribution pipe arranged horizontally in the filtration zone and a water distribution nozzle arranged at the bottom end of the water distribution pipe; one end of the water distribution pipe is sealed and the other end is provided with the water inlet.

7. The fixed-bed pressurized turbid water purification device according to claim 1, characterized in that, The filter media layer structure includes a support layer disposed at the top of the filter plate and a filter media layer disposed at the top of the support layer; and / or, A water filter cap is provided at the bottom of the filter plate; the water filter cap has uniform water-permeable slits.

8. The fixed-bed pressurized turbid water purification device according to claim 1, characterized in that, A backwash drain valve is installed in the clear water chamber; The forward wash drain valve and the filtered water production valve are respectively located on both sides of the clear water chamber.

9. The fixed-bed pressurized turbid water purification device according to claim 1, characterized in that, The sedimentation zone and the filtration zone are separated by a partition; The outer peripheral end of the partition is fixed to the inner sidewall of the outer shell.

10. A method for purifying turbid circulating water, characterized in that, The purification of turbid circulating water using the fixed-bed pressurized turbid circulating water purification device as described in any one of claims 1-9 includes the following steps: 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; 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. 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 water 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. Step S4: The pre-purified turbid circulating water from the sedimentation outlet zone enters the water collection mechanism and then enters the filtration distribution mechanism of the filtration zone through the outlet pipe. Step S5: The pre-purified turbid circulating water is distributed to the distribution area through the filtration and water distribution mechanism. The pre-purified turbid circulating water in the distribution area flows through the filter media layer structure to obtain the deep purified water, which enters the clear water chamber through the filter plate and is discharged by the filtered water production valve.

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