Centrifugal separation coupling separation medium micro-channel filtering device and use method thereof

Abstract

The invention relates to a centrifugal separation coupling separation medium micro-channel filtering device and a use method thereof. The device comprises a pressure-bearing shell, and a backwashing liquid inlet is formed in the bottom of the pressure-bearing shell; an inner cavity of the pressure-bearing shell forms a regeneration cavity; a backwashing liquid enters the pressure-bearing shell through the backwashing liquid inlet and can form an upward spiral lifting flow in the regeneration cavity; the centrifugal and filtering coupling separator comprises a centrifugal separation shell, separation medium micro-channel filtering layers are arranged in the centrifugal separation shell at intervals in a sleeving manner, the bottom ends of the separation medium micro-channel filtering layers are communicated with a liquid removing disc, and the liquid removing disc can be communicated with the regeneration cavity; separating a medium material bin; and the axial flow cyclone regenerator is communicated with the regeneration cavity through a regeneration inclined pipe. The design of combining centrifugal separation and separation medium micro-channel filtration is adopted, high separation precision is ensured, the design of the backwashing liquid inlet and the axial flow cyclone regenerator is adopted, two-stage regeneration of the separation medium is achieved, and the equipment can operate continuously and stably and does not need to be shut down for backwashing.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment and reuse, and in particular to a centrifugal separation coupled separation medium microchannel filtration device and a method for using the same. Background Art

[0002] Wastewater generated during industrial production and urban life includes heavy metal ions, refractory organic matter, suspended solids and odorous substances. Currently, the commonly used treatment processes mainly include pretreatment, biological treatment, advanced treatment and sludge treatment. In the pretreatment stage, suspended solids and coarse particles are removed through screens and grit chambers; in the biological treatment stage, activated sludge method, A 2 In the advanced treatment stage, pollutants are further removed through processes such as O and MBBR (moving bed biofilm reactor). While the MBR process offers high effluent quality, its operating costs are relatively high, at approximately RMB 0.50 per ton of water. During the sludge treatment stage, the sludge is stabilized, concentrated, dehydrated, and recycled. Currently, urban sewage in my country is typically treated biologically, with the effluent discharged into nearby rivers, resulting in a low resource utilization rate. Furthermore, existing biological treatment wastewater plants face challenges such as large land occupation, difficulty cultivating activated sludge, insufficient carbon sources, low removal rates for emerging pollutants, and the generation of excess sludge. Therefore, a new approach to treating and reusing urban sewage using physical methods is urgently needed to address these issues.

[0003] First, due to the wide particle size distribution of suspended matter in sewage, some particles smaller than 0.5 μm are easily introduced into the filter pores during filtration, causing pore blockage and affecting the purification effect. Chinese patent ZL202211476730.X proposes a physical method for treating and reusing sewage, which achieves interception and filtration of particles below 0.8 μm by setting up multi-stage filter membrane units. However, membrane filtration has the problem of membrane contamination, which requires regular chemical cleaning or replacement, and the initial investment is high (such as PTFE microporous filter membrane is about 130 yuan / piece), and the anti-fouling performance depends on the material properties.

[0004] Clearly, filter media regeneration is a key factor influencing wastewater treatment effectiveness. Chinese Patent ZL202321434921.X proposes a multi-media filtration device that, through the structural design of a buffer plate and anti-tampering ring, effectively protects the filter media and improves filtration efficiency. A water trough and waterway are also provided to ensure smooth water flow, making the filtration process more efficient. However, this device does not address the issue of filter media regeneration. Filtration effectiveness can only be maintained through frequent media replacement, which fails to meet the requirements for continuous, efficient purification. Media wear reduces the effective thickness of the bed, leading to a continuous decline in filtration efficiency. This ultimately requires frequent bed media replacement, increasing operating costs and ultimately reducing the device's filtration efficiency, which in turn affects separation efficiency and stable operation. A process combining microchannel filtration separation with a cyclonic regeneration process for the separation media can effectively address the continuous and stable operation of similar devices. However, the operation of this combined process is closely related to parameters such as the separation media, regeneration feed, separation media operating conditions, and cyclonic structure.

[0005] Therefore, the inventors, relying on their many years of experience and practice in related industries, have proposed a centrifugal separation coupled separation medium microchannel filtration device and a method of using the same to overcome the shortcomings of the prior art. Summary of the Invention

[0006] The purpose of the present invention is to provide a centrifugal separation coupled separation medium microchannel filtration device and a method for using the same, so as to overcome the operational defects of the above-mentioned prior art, such as poor purification effect of fine particulate matter, inability to efficiently regenerate the filter medium, and frequent start-up and shutdown of the device. The present invention adopts a combined design of centrifugal separation and separation medium microchannel filtration to effectively improve the separation effect of suspended matter above 0.5 μm in sewage, ensuring high separation accuracy. The design of the backwash inlet and the axial flow cyclone regenerator is adopted to realize the two-stage regeneration of the separation medium "initial release + enhanced regeneration", so that the equipment can operate continuously and stably without stopping for backwashing.

[0007] The object of the present invention is achieved by providing a centrifugal separation coupled separation medium microchannel filtration device comprising:

[0008] A pressure-bearing shell is provided with a fine impurity outlet and a clean water outlet at the top of the pressure-bearing shell, a sewage inlet is connected to the side wall of the pressure-bearing shell, and an underflow outlet and a backwash liquid inlet are provided at the bottom of the pressure-bearing shell; the inner cavity of the pressure-bearing shell constitutes a regeneration chamber; the backwash liquid enters the pressure-bearing shell through the backwash liquid inlet and can form an upward spiral lifting flow in the regeneration chamber;

[0009] A centrifugal and filtration coupled separator is disposed within the pressure-bearing housing and includes a centrifugal separation housing, a tangential inlet corresponding to the sewage inlet being provided on a side wall of the centrifugal separation housing, a separation medium microchannel filtration layer being spaced apart within the centrifugal separation housing, the inner cavity of the separation medium microchannel filtration layer being in communication with the purified water outlet; a baffle is provided on an outer wall of the separation medium microchannel filtration layer at a position corresponding to the tangential inlet, the bottom end of the separation medium microchannel filtration layer being in communication with a deliquidation tray, the deliquidation tray being capable of communicating with the regeneration chamber; and the bottom end of the centrifugal separation housing being capable of communicating with the underflow port.

[0010] A separation medium silo is connected to the top of the separation medium microchannel filtration layer;

[0011] An axial flow cyclone regenerator is connected to the regeneration cavity through a regeneration inclined pipe, and the top and bottom ends of the axial flow cyclone regenerator are respectively connected to the fine impurity outlet and the separation medium silo.

[0012] In a preferred embodiment of the present invention, the inner cavity of the separation medium microchannel filtration layer is connected to the clean water outlet via a clean water pipe; a coarse impurity bin is provided at the bottom end of the centrifugal separation housing, the bottom end of the coarse impurity bin is connected to the underflow outlet, and the deliquidation tray is installed on the coarse impurity bin;

[0013] The clean water outlet, the separation medium silo, the centrifugal and filtration coupling separator, the regeneration chamber, the baffle, the deliquidation tray, the coarse impurity bin and the underflow port are coaxially arranged.

[0014] In a preferred embodiment of the present invention, two backwash liquid inlets are symmetrically arranged at the bottom of the pressure-bearing shell, and each backwash liquid inlet is connected to a backwash liquid inlet pipe arranged along the tangent direction of the pressure-bearing shell; the angle between the central axis of the backwash liquid inlet pipe and the horizontal plane is 30° to 75°.

[0015] In a preferred embodiment of the present invention, a distribution pipe connected to the backwash liquid inlet is provided in the pressure-bearing shell, and distribution holes are provided on the distribution pipe to allow the backwash liquid to be fed upward.

[0016] In a preferred embodiment of the present invention, the deliquoring plate includes a filter discharge pipe, an upper baffle, a conical drain plate and a leakage port, the leakage port is connected to the coarse impurity bin, the leakage port is a Johnson mesh gap, and the size of the Johnson mesh gap is smaller than the particle size of the separation medium; a separation medium channel is formed between the upper baffle and the conical drain plate, and the outlet of the separation medium channel is connected to the regeneration chamber.

[0017] In a preferred embodiment of the present application, the centrifugal separation shell and the separation medium micro-channel filter layer are coaxially arranged; the outer diameter of the separation medium micro-channel filter layer is 50%-70% of the inner diameter of the centrifugal separation shell.

[0018] In a preferred embodiment of the present application, the separation medium micro-channel filter layer comprises a straight cylinder section and a tapered cylinder section arranged in communication; the flow baffle is arranged on the sidewall of the straight cylinder section, and the length of the flow baffle along the axial direction of the straight cylinder section is less than or equal to 80% of the axial length of the straight cylinder section.

[0019] In a preferred embodiment of the present application, the axial flow cyclone regenerator is symmetrically arranged in the upper space of the pressure-bearing shell, and the loss of the separation medium after the cyclone regeneration is less than or equal to 0.02% of the total amount of the separation medium filled in the separation medium micro-channel filter layer; the angle between the central axis of the regeneration inclined pipe and the horizontal plane is 25°-45°.

[0020] The purpose of the present application can also be achieved by a method for using the aforementioned centrifugal separation device coupled with a separation medium micro-channel filter, comprising:

[0021] The sewage is introduced into the sewage inlet of the pressure-bearing shell, and the sewage enters the centrifugal separation shell in a tangential direction, and is forced to form a cyclone under the constraint of the flow baffle and the centrifugal separation shell, so that a part of the particles with large particle size are removed by centrifugation; in the process of downward cyclone of the sewage, the separation medium micro-channel filter layer performs secondary interception and filtration on the fine particles remaining in the water flow after centrifugal separation, and the purified water flow is discharged from the clean water outlet at the top of the pressure-bearing shell;

[0022] The particles with large particle size removed by centrifugation fall into the coarse impurity bin and are discharged from the underflow port; the fine particles intercepted by the separation medium micro-channel filter layer enter the regeneration cavity along with the separation medium through the liquid discharge disc;

[0023] The backwash liquid injected from the backwash liquid inlet forms an upward spiral lifting flow in the regeneration cavity, and oscillates the separation medium and the fine particles under the action of the cyclone field; the separation medium and the fine particles after preliminary treatment enter the axial flow cyclone regenerator under the action of the airflow, the axial flow cyclone regenerator regenerates the separation medium, and the regenerated separation medium returns to the separation medium bin; the backwash liquid carrying the fine particles is discharged from the fine impurity outlet at the top of the pressure-bearing shell, and at least part of the backwash liquid returns to the backwash liquid inlet.

[0024] In a preferred embodiment of the present application, 2 or more centrifugal separation devices coupled with a separation medium micro-channel filter are used in series;

[0025] Alternatively, a plurality of centrifugal separation devices coupled with a separation medium micro-channel filter are used in parallel.

[0026] As described above, the centrifugal separation coupled separation medium microchannel filtration device and its use method of the present invention have the following beneficial effects:

[0027] The centrifugal and filtration coupled separator of the present invention couples a centrifugal separation structure and a separation medium microchannel filtration structure, and adopts a centrifugal separation coupled with separation medium microchannel filtration method for sewage treatment, which can effectively improve the separation effect of suspended matter above 0.5μm in sewage and ensure high separation accuracy.

[0028] The present invention utilizes a centrifugal separation mechanism to efficiently separate suspended matter larger than 5 to 10 μm, and a separation medium microchannel filtration mechanism to separate suspended matter smaller than 5 μm, thereby effectively reducing the filtration pressure of the centrifugal separation coupled separation medium microchannel filtration device.

[0029] In the centrifugal separation housing of the present invention, a baffle is provided at a position corresponding to the tangential inlet, and the baffle is used to avoid short-circuit flow, thereby ensuring that sewage can be effectively purified by centrifugal separation and microchannel filtration.

[0030] The present invention adopts a deliquoring plate to separate the separation medium from the possible entrained liquid, thereby preventing excessive liquid from entering the regeneration chamber and causing blockage of the backwash liquid inlet.

[0031] The present invention adopts the design of a backwash liquid inlet and an axial flow cyclone regenerator to achieve two-stage regeneration of the separation medium, namely "initial release + enhanced regeneration". This can enable the equipment to operate continuously and stably, solve the problems of frequent replenishment and replacement of the separation medium and frequent start and stop of the equipment, and significantly reduce the cost of sewage treatment.

[0032] This invention offers advantages such as a simple process flow, high separation precision, and manageable costs. The combined process of centrifugal separation and microchannel filtration of the separation medium enables continuous and stable operation without the need for downtime for backwashing. During operation, the invention has no rotating parts other than the circulation of the separation medium, resulting in a low failure rate and low maintenance costs.

[0033] The centrifugal separation coupled separation medium microchannel filtration device of the present invention can be used in a multi-stage series or parallel manner to treat sewage during use. The unit operation method adopted can flexibly increase or decrease the number of devices and the arrangement method according to water volume changes or purification requirements, and is easy to modify and expand. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The following drawings are only intended to illustrate and explain the present invention, and are not intended to limit the scope of the present invention.

[0035] in:

[0036] Figure 1 Schematic diagram of the structure of the centrifugal separation coupled separation medium microchannel filtration device of Example 1 of the present invention.

[0037] Figure 2 It is a top view of embodiment 1 of the present invention.

[0038] Figure 3 It is a bottom view of embodiment 1 of the present invention.

[0039] Figure 4 Schematic diagram of the structure of the centrifugal separation coupled separation medium microchannel filtration device of Example 2 of the present invention.

[0040] Figure 5 It is a top view of embodiment 2 of the present invention.

[0041] Figure 6 This is a bottom view of Example 2 of the present invention.

[0042] Figure 7 It is a front view of the deliquoring tray of the present invention.

[0043] Figure 8 It is a bottom view of the deliquoring tray of the present invention.

[0044] Figure 9 This is a schematic diagram of a plurality of centrifugal separation coupled separation medium microchannel filtration devices connected in series according to Example 4 of the present invention.

[0045] Figure 10 This is a schematic diagram of multiple centrifugal separation coupled separation medium microchannel filtration devices connected in parallel according to Example 5 of the present invention.

[0046] In the picture:

[0047] 1. Clean water outlet; 2. Fine impurity outlet; 3. Axial flow cyclone regenerator; 4. Pressure shell; 5. Separation medium silo; 6. Baffle; 7. Sewage inlet; 8. Centrifugal and filtration coupling separator; 9. Centrifugal separation shell; 10. Separation medium microchannel filter layer; 11. Regeneration chamber; 12. Deliquidation plate; 121. Filter discharge pipe; 122. Upper baffle; 123. Conical drain plate; 124. Leakage port; 13. Coarse impurity bin; 14. Backwash liquid inlet; 15. Underflow port; 16. Distribution pipe; 17. Backwash liquid inlet pipe. DETAILED DESCRIPTION

[0048] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described with reference to the accompanying drawings.

[0049] The specific embodiments of the present invention described herein are intended only to illustrate the present invention and are not to be construed as limiting the present invention in any way. In light of the present invention, a skilled person may conceive of any possible variations based on the present invention, all of which should be considered to fall within the scope of the present invention. It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be an intermediate element at the same time. The terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to mechanical or electrical connections, or to internal communication between two elements, and may be directly connected or indirectly connected through an intermediate medium. A person of ordinary skill in the art can understand the specific meanings of the above terms based on the specific circumstances. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are intended only to describe specific embodiments and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0051] Example 1

[0052] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 7 、 Figure 8 As shown, the present invention provides a centrifugal separation coupled separation medium microchannel filtration device, comprising:

[0053] The pressure-bearing shell 4 has a fine impurity outlet 2 and a clean water outlet 1 at the top, a sewage inlet 7 connected to the side wall of the pressure-bearing shell 4, and an underflow outlet 15 and a backwash liquid inlet 14 at the bottom of the pressure-bearing shell 4. The inner cavity of the pressure-bearing shell 4 constitutes a regeneration chamber 11. The backwash liquid enters the pressure-bearing shell 4 through the backwash liquid inlet and can form an upward spiral lift flow in the regeneration chamber 11.

[0054] A centrifugal and filtration coupled separator 8 is disposed within a pressure-bearing housing 4 and includes a centrifugal separation housing 9. A tangential inlet corresponding to the sewage inlet 7 is provided on the sidewall of the centrifugal separation housing 9. A separation medium microchannel filtration layer 10 is spaced apart within the centrifugal separation housing 9. The inner cavity of the separation medium microchannel filtration layer 10 is connected to the purified water outlet 1. A baffle 6 is provided on the outer wall of the separation medium microchannel filtration layer 10 at a position corresponding to the tangential inlet. The bottom end of the separation medium microchannel filtration layer 10 is connected to a deliquescence tray 12. The deliquescence tray 12 can be connected to an underflow port 15 and a regeneration chamber 11, respectively. The deliquescence tray 12 separates the separation medium from any entrained liquid. The entrained liquid is discharged through the underflow port, and the separation medium is regenerated within the regeneration chamber 11. The bottom end of the centrifugal separation housing 9 can be connected to the underflow port 15.

[0055] The separation medium silo 5 is connected to the top of the separation medium microchannel filter layer 10;

[0056] The axial flow cyclone regenerator 3 is connected to the regeneration chamber 11 through the regeneration inclined pipe. The top and bottom ends of the axial flow cyclone regenerator 3 are respectively connected to the fine impurities outlet 2 and the separation medium silo 5.

[0057] Sewage (the objects to be treated can come from sewage in urban residential buildings and public buildings; or from industrial sewage such as chemical, metallurgical, papermaking, printing and dyeing, and food processing.) enters from the sewage inlet 7 on the side of the pressure shell 4 and enters the centrifugal separation shell 9 tangentially. Under the restraining action of the baffle 6 and the centrifugal separation shell 9, the sewage is forced to form a vortex. The centrifugal mechanism is used to first remove a portion of large-size particles (particle size ≥ 10μm). In the process of the water flowing downward in a spiral, the separation medium microchannel filter layer 10 performs a secondary interception and filtration mechanism (inertial collision, direct interception, electrostatic adsorption, free diffusion, etc.) on the fine particles (<10μm) remaining in the water flow after centrifugal separation. The purified water flow is discharged from the clean water outlet 1 at the top of the pressure shell 4.

[0058] Large particles captured by the centrifugal mechanism fall under gravity and are discharged from the underflow port 15. Fine particles filtered by the microchannels follow the separation medium through the deliquescence tray 12 and enter the regeneration chamber 11. The deliquescence tray 12 separates the separation medium from any entrained liquid. The backwash liquid entering through the backwash liquid inlet 14 forms an upward spiral lift flow in the regeneration chamber 11. Under the action of the cyclonic field, the separation medium and fine particles are oscillated, achieving a preliminary release of the separation medium and enhancing the regeneration effect of the separation medium.

[0059] The preliminary treated separation medium and the fine particles are axially introduced into the axial flow cyclone regenerator 3 under the action of the airflow, and the regenerated separation medium is returned from the bottom of the axial flow cyclone regenerator 3 to the separation medium bin 5, and the backwashing liquid carrying the fine particles is discharged from the top fine and impure outlet 2, and part of the backwashing liquid is returned to the backwashing liquid inlet 14 for recycling of the separation medium regeneration.

[0060] The centrifugal and filtration coupled separator 8 of the application couples the centrifugal separation structure and the separation medium micro-channel filtration structure, adopts the centrifugal separation coupled separation medium micro-channel filtration mode for sewage treatment, can effectively improve the separation effect of the suspended matters above 0.5 μm in the sewage, and ensures high separation precision.

[0061] The application utilizes the centrifugal separation mechanism to efficiently separate the suspended matters above 5-10 μm, and utilizes the separation medium micro-channel filtration mechanism to separate the suspended matters below 5 μm, and effectively reduces the filtration pressure of the centrifugal separation coupled separation medium micro-channel filtration device.

[0062] The centrifugal separation shell 9 of the application is provided with the flow baffle 6 at the position corresponding to the tangential inlet, the flow baffle 6 is adopted to avoid the short circuit flow phenomenon, and the sewage can be effectively purified through the centrifugal separation and the micro-channel filtration.

[0063] The application adopts the liquid separation disc 12 to separate the separation medium and the possible entrained liquid, avoids too much liquid entering the regeneration cavity 11, and causes the backwashing liquid inlet 14 to be blocked.

[0064] The application adopts the design of the backwashing liquid inlet and the axial flow cyclone regenerator, realizes the two-stage regeneration of the separation medium “preliminary release + intensified regeneration”, can continuously and stably operate the equipment, solves the problems of frequent replacement of the separation medium and frequent start and stop of the equipment, and greatly reduces the sewage treatment cost.

[0065] The application has the advantages of simple process flow, high separation precision and controllable cost; the combination process of the centrifugal separation and the separation medium micro-channel filtration can continuously and stably operate the equipment without shutdown backwashing. In the running process, there is no rotating part except the circulation of the separation medium, the failure rate is low, and the maintenance cost is low.

[0066] Further, as shown in Figure 1 The inner cavity of the separation medium micro-channel filtration layer 10 is connected with the clean water outlet 1 through the clean water pipe; the bottom end of the centrifugal separation shell 9 is provided with the coarse and impure bin 13, the bottom end of the coarse and impure bin 13 is connected with the bottom flow port 15, and the liquid separation disc 12 is arranged on the coarse and impure bin;

[0067] The clean water outlet 1, the separation medium bin 5, the centrifugal and filtration coupled separator 8, the regeneration cavity 11, the flow baffle 6, the liquid separation disc 12, the coarse and impure bin 13 and the bottom flow port 15 are coaxially arranged.

[0068] Furthermore, the structure of the backwash liquid inlet at the bottom of the pressure-bearing shell 4 can adopt various forms, as long as the backwash liquid entering therethrough can generate an upward spiral lifting flow.

[0069] like Figure 2 、 Figure 3 As shown, in this embodiment, two backwash liquid inlets are symmetrically arranged at the bottom of the pressure-bearing shell 4, and each backwash liquid inlet is connected to a backwash liquid inlet pipe 17 arranged tangentially along the pressure-bearing shell 4; the angle between the central axis of the backwash liquid inlet pipe 17 and the horizontal plane is 30° to 75°.

[0070] Further, if Figure 7 、 Figure 8 As shown, the deliquoring tray 12 includes a filter discharge pipe 121, an upper baffle 122, a conical drain plate 123, and a liquid leakage port 124. The liquid leakage port 124 communicates with the coarse impurity bin 13 and is a Johnson mesh gap whose size is smaller than the particle size of the separation medium. A separation medium channel is formed between the upper baffle 122 and the conical drain plate 123, and the outlet of the separation medium channel communicates with the regeneration chamber 11. The conical drain plate 123 is made of a Johnson mesh and has an angle of 30° to 75° with the horizontal plane. The Johnson mesh gaps, whose width is smaller than the particle size of the separation medium, form the liquid leakage port.

[0071] When the fine particles obtained by microchannel filtration pass through the filter discharge pipe 121 with the separation medium and enter the conical drain plate 123, the entrained liquid may leak downward from the leakage port 124 and enter the coarse impurity bin 13, preventing excessive liquid from entering the regeneration chamber 11 and causing blockage of the backwash liquid inlet 14.

[0072] Furthermore, the centrifugal separation housing 9 and the separation medium microchannel filtration layer 10 are coaxially arranged; the outer diameter of the separation medium microchannel filtration layer 10 is 50% to 70% of the inner diameter of the centrifugal separation housing 9 .

[0073] Further, if Figure 1 As shown, the separation medium microchannel filtration layer 10 includes a straight cylindrical section and a tapered cylindrical section that are connected to each other in an upper and lower manner; the baffle 6 is arranged on the side wall of the straight cylindrical section, and the axial length (height) of the baffle 6 along the straight cylindrical section is less than or equal to 80% of the axial length (height) of the straight cylindrical section.

[0074] Further, if Figure 1As shown, the axial flow cyclone regenerator 3 is symmetrically arranged in the upper space of the pressure-bearing shell 4, and the loss of the separated medium after the rotational regeneration of the separated medium (in the filtration operation process, due to wear and other reasons, the filter medium is broken, the particle size is reduced, and thus the separated medium is lost at the position of the leaching disc and the like, and the phenomenon of the reduction of the separated medium occurs, and the loss of the filter medium in unit time (day) is less than or equal to 0.02% of the total amount of the separated medium filled in the separated medium micro-channel filter layer 10; the included angle between the central axis of the regenerative inclined pipe and the horizontal plane is 25°-45°.

[0075] In the embodiment, the particle size of the separated medium filled in the separated medium micro-channel filter layer 10 is between 0.05-2 mm.

[0076] Through the above structure and setting mode, on the one hand, the application efficiently separates the suspended matters above 5-10 μm by using the centrifugal separation mechanism, separates the suspended matters below 5 μm by using the separated medium micro-channel filtration mechanism, and effectively reduces the filtration pressure of the centrifugal separation coupled separated medium micro-channel filtration device; on the other hand, the application realizes the two-stage regeneration of the separated medium by using the tangential backwashing liquid inlet 14 and the axial flow cyclone regenerator 3, which realizes the continuous and stable operation of the equipment, solves the problem of the frequent replacement of the separated medium, and greatly reduces the cost of the sewage treatment.

[0077] Embodiment 2

[0078] The embodiment provides another form of the centrifugal separation coupled separated medium micro-channel filtration device, and the structure thereof can be seen from Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 as shown.

[0079] The overall structure of the embodiment is basically the same as that of the embodiment 1, and the difference lies in the structure setting of the backwashing liquid inlet 14.

[0080] As shown in Figure 4 、 Figure 5 、 Figure 6 , in the embodiment, the distribution pipe 16 in communication with the backwashing liquid inlet 14 is arranged in the pressure-bearing shell 4, and the distribution holes allowing the upward feeding of the backwashing liquid are arranged on the distribution pipe 16.

[0081] The backwashing liquid is vertically fed upward through the distribution pipe 16, so that the bed layer is in a fluidized state, the pollutants between the separated media are preliminarily released, the separated media are further regenerated upward into the axial flow cyclone regenerator 3, and the separated medium particles are recovered at the same time. The backwashing liquid carrying the fine particles is discharged from the fine and impurity outlet 2 at the top of the pressure-bearing shell 4, and part of the backwashing liquid is returned to the backwashing liquid inlet 14 for the regeneration of the separated medium.

[0082] Embodiment 3

[0083] The present invention provides a method for using the aforementioned centrifugal separation coupled separation medium microchannel filtration device, comprising:

[0084] Sewage is introduced into the sewage inlet 7 on the side of the pressure shell 4. The sewage to be treated can come from urban residential and public buildings; or from industrial wastewater such as chemical, metallurgical, papermaking, printing and dyeing, and food processing. The sewage enters the centrifugal separation shell 9 along a tangential direction. Under the restraining action of the baffle 6 and the centrifugal separation shell 9, the sewage is forced into a vortex, and a portion of large-sized particles (particle size ≥ 10μm) are removed by centrifugation. During the downward vortex of the sewage, the separation medium microchannel filter layer 10 performs a secondary interception and filtration on the fine particles remaining in the water flow after centrifugation. The purified water is discharged from the clean water outlet 1 at the top of the pressure shell 4.

[0085] The large-sized particles removed by centrifugation fall into the coarse impurity bin 13 and are discharged from the bottom flow outlet 15. The fine particles (particle size <10 μm) filtered and intercepted by the separation medium microchannel filter layer 10 pass through the deliquidation disk 12 and enter the regeneration chamber 11 along with the separation medium.

[0086] The backwash liquid injected from the backwash liquid inlet 14 forms an upward spiral lifting flow in the regeneration chamber 11, and oscillates the separation medium and fine particles under the action of the cyclonic field. The separation medium and fine particles after preliminary treatment enter the axial flow cyclone regenerator 3 under the action of the airflow. The axial flow cyclone regenerator 3 regenerates the separation medium, and the regenerated separation medium returns to the separation medium silo 5; the backwash liquid carrying fine particles is discharged from the fine impurity outlet 2 at the top of the pressure shell 4, and at least part of the backwash liquid flows back to the backwash liquid inlet 14 for separation medium regeneration.

[0087] Furthermore, the arrangement of the centrifugal separation coupled separation media microchannel filtration device of the present invention can be adjusted according to changes in water volume or purification requirements, and two or more centrifugal separation coupled separation media microchannel filtration devices can be used in series (see Example 4 for details); or, multiple centrifugal separation coupled separation media microchannel filtration devices can be used in parallel (see Example 5 for details).

[0088] The centrifugal separation coupled separation medium microchannel filtration device of the present invention can be used in a multi-stage series or parallel manner to treat sewage during use. The unit operation method adopted can flexibly increase or decrease the number of devices and the arrangement method according to water volume changes or purification requirements, and is easy to modify and expand.

[0089] Example 4

[0090] like Figure 9 As shown, the centrifugal separation coupled separation medium microchannel filtration device of the present invention can be used in a manner of two or more connected in series.

[0091] Sewage enters the first-stage centrifugal separation coupled separation media microchannel filtration device through the sewage inlet 7 on the side and enters the centrifugal separation housing 9 tangentially. Under the momentum transfer effect of the backwash liquid, the separation medium in the separation media microchannel filtration layer 10 reaches a swirling state in the regeneration chamber 11. The axial flow cyclone regenerator 3 at the top of the centrifugal separation coupled separation media microchannel filtration device separates and recovers the separation media particles. The backwash liquid, carrying fine particles, is discharged from the top fine impurity outlet 2 and continues to be processed by the second-stage centrifugal separation coupled separation media microchannel filtration device in series, achieving deep purification and efficient reaction of the liquid phase product. Two or more stages of centrifugal separation coupled separation media microchannel filtration devices can be used in series to achieve optimal results. Separation media with different filtration accuracies are filled in the separation media microchannel filtration layer 10. After entering the first-stage centrifugal separation coupled separation media microchannel filtration device, the sewage undergoes centrifugal separation and microchannel filtration, and the clean liquid phase product enters the next stage device through a pipeline to obtain an even cleaner liquid phase product.

[0092] Example 5

[0093] like Figure 10 As shown, the centrifugal separation coupled separation medium microchannel filtration device of the present invention can be used in parallel in multiple ways.

[0094] Sewage enters each centrifugal separation coupled separation medium microchannel filtration device through the main pipeline (existing technology), enters from the sewage inlet 7 on the side of the device and enters the centrifugal separation shell 9 tangentially; under the momentum transfer action of the backwash liquid, the separation medium of the separation medium microchannel filtration layer 10 reaches a cyclonic state in the regeneration chamber 11; the axial flow cyclone regenerator 3 in the pressure shell 4 separates and recovers the medium particles at the same time, and the backwash liquid entrained with fine particles is discharged from the fine impurities outlet 2 at the top of the pressure shell 4. The treated clean liquid product is discharged through the clean water outlet 1 at the top of the pressure shell 4 and collected by the main pipeline.

[0095] The unit operation mode adopted in the present invention can flexibly increase or decrease the number of devices and the arrangement mode according to the change of processing volume or purification requirements, and is easy to modify and expand.

[0096] The above description is only an illustrative embodiment of the present invention and is not intended to limit the scope of the present invention. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principle of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A centrifugal separation coupled separation medium microchannel filtration device, characterized in that: include: A pressure-bearing shell, wherein a fine impurity outlet and a clean water outlet are provided on the top of the pressure-bearing shell, a sewage inlet is provided on the side wall of the pressure-bearing shell, an underflow outlet and a backwash liquid inlet are provided at the bottom of the pressure-bearing shell; and the inner cavity of the pressure-bearing shell constitutes a regeneration cavity; The backwash liquid enters the pressure-bearing shell through the backwash liquid inlet and can form an upward spiral lifting flow in the regeneration chamber; A centrifugal and filtration coupled separator is disposed within the pressure-bearing housing and includes a centrifugal separation housing, a tangential inlet corresponding to the sewage inlet being provided on a side wall of the centrifugal separation housing, a separation medium microchannel filtration layer being spaced apart within the centrifugal separation housing, the inner cavity of the separation medium microchannel filtration layer being in communication with the purified water outlet; a baffle is provided on an outer wall of the separation medium microchannel filtration layer at a position corresponding to the tangential inlet, the bottom end of the separation medium microchannel filtration layer being in communication with a deliquidation tray, the deliquidation tray being capable of communicating with the regeneration chamber; and the bottom end of the centrifugal separation housing being capable of communicating with the underflow port. A separation medium silo is connected to the top of the separation medium microchannel filtration layer; An axial flow cyclone regenerator is connected to the regeneration cavity through a regeneration inclined pipe, and the top and bottom ends of the axial flow cyclone regenerator are respectively connected to the fine impurity outlet and the separation medium silo.

2. The centrifugal separation coupled separation medium microchannel filtration device according to claim 1, characterized in that: The inner cavity of the separation medium microchannel filtration layer is connected to the clean water outlet via a clean water pipe; a coarse impurity bin is provided at the bottom end of the centrifugal separation housing, the bottom end of the coarse impurity bin is connected to the underflow port, and the deliquidation tray is installed on the coarse impurity bin; The clean water outlet, the separation medium silo, the centrifugal and filtration coupling separator, the regeneration chamber, the baffle, the deliquidation tray, the coarse impurity bin and the underflow port are coaxially arranged.

3. The centrifugal separation coupled separation medium microchannel filtration device according to claim 1, characterized in that: Two backwash liquid inlets are symmetrically arranged at the bottom of the pressure-bearing shell, and each backwash liquid inlet is connected to a backwash liquid inlet pipe arranged tangentially along the pressure-bearing shell; the angle between the central axis of the backwash liquid inlet pipe and the horizontal plane is 30° to 75°.

4. The centrifugal separation coupled separation medium microchannel filtration device according to claim 1, characterized in that: A distribution pipe connected to the backwash liquid inlet is provided in the pressure-bearing shell, and distribution holes for allowing the backwash liquid to be fed upward are provided on the distribution pipe.

5. The centrifugal separation coupled separation medium microchannel filtration device according to claim 2, characterized in that: The deliquoring plate includes a filter discharge pipe, an upper baffle, a conical drain plate and a leakage port, wherein the leakage port is connected to the coarse impurity bin, and the leakage port is a Johnson mesh gap, the size of which is smaller than the particle size of the separation medium; a separation medium channel is formed between the upper baffle and the conical drain plate, and the outlet of the separation medium channel is connected to the regeneration chamber.

6. The centrifugal separation coupled separation medium microchannel filtration device according to claim 1, characterized in that: The centrifugal separation shell and the separation medium microchannel filter layer are coaxially arranged; the outer diameter of the separation medium microchannel filter layer is 50% to 70% of the inner diameter of the centrifugal separation shell.

7. The centrifugal separation coupled separation medium microchannel filtration device according to claim 1, characterized in that: The separation medium microchannel filtration layer includes a straight cylindrical section and a tapered cylindrical section connected to each other in an upper and lower manner; the baffle is arranged on the side wall of the straight cylindrical section, and the axial length of the baffle along the straight cylindrical section is less than or equal to 80% of the axial length of the straight cylindrical section.

8. The centrifugal separation coupled separation medium microchannel filtration device according to claim 1, characterized in that: The axial flow cyclone regenerators are symmetrically arranged in the upper space of the pressure shell, and the daily loss of the separation medium after cyclone regeneration is less than or equal to 0.02% of the total amount of separation medium loaded in the separation medium microchannel filter layer; the angle between the central axis of the regeneration inclined tube and the horizontal plane is 25° to 45°.

9. A method for using the centrifugal separation coupled separation medium microchannel filtration device according to any one of claims 1 to 8, characterized in that: include: Sewage is introduced into the sewage inlet of the pressure shell and enters the centrifugal separation shell along a tangential direction. Under the restraining action of the baffle and the centrifugal separation shell, the sewage is forced to form a vortex, and some large-sized particles are removed by centrifugation. During the downward vortex of the sewage, the separation medium microchannel filter layer performs a secondary interception and filtration on the fine particles remaining in the water flow after centrifugal separation. The purified water flow is discharged from the clean water outlet at the top of the pressure shell; The large-sized particles removed by centrifugation fall into the coarse impurities bin and are discharged from the bottom flow outlet; The fine particles filtered and intercepted by the separation medium microchannel filter layer pass through the deliquescence plate and enter the regeneration chamber along with the separation medium; The backwash liquid injected from the backwash liquid inlet forms an upward spiral lifting flow in the regeneration chamber, and oscillates the separation medium and fine particles under the action of the cyclonic field. The separation medium and fine particles after preliminary treatment enter the axial flow cyclone regenerator under the action of the airflow, and the axial flow cyclone regenerator regenerates the separation medium. The regenerated separation medium returns to the separation medium silo; the backwash liquid carrying fine particles is discharged from the fine impurities outlet at the top of the pressure shell, and at least part of the backwash liquid flows back to the backwash liquid inlet.

10. The method for using the centrifugal separation coupled separation medium microchannel filtration device according to claim 9, wherein: Two or more of the centrifugal separation coupled separation medium microchannel filtration devices are used in series; Alternatively, a plurality of the centrifugal separation coupled separation medium microchannel filtration devices are used in parallel.

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