Micro-flocculation super-flux catalytic filtration treatment process and system

Abstract

The invention belongs to the technical field of sewage filtration, and particularly relates to a micro-flocculation super-flux catalytic filtration treatment process and system. The process comprises the following steps: S1, adding biogel into a plurality of parallel reaction tanks for collecting rain sewage, stirring and mixing to form floccules, and enabling a water body containing the floccules to flow into a micro-flocculation super-flux catalytic filtration system; s2, filtering the water body by a rotary drum type filter screen of the micro-flocculation super-flux catalytic filtration system to intercept solid particles; meanwhile, a backwashing pump of the micro-flocculation super-flux catalytic filtration system is started, and filtered effluent is pumped by the backwashing pump to perform backwashing on a rotary drum type filter screen; meanwhile, an ultraviolet lamp in the micro-flocculation super-flux catalytic filtration system is turned on to irradiate the nano-scale catalytic material coated on the surface of the rotary drum type filter screen, so that residual pollutants on the rotary drum type filter screen are removed. The superflux and the filtering efficiency of the rotary drum type filter screen are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of sewage filtration, and in particular relates to a micro-flocculation super-flux catalytic filtration treatment process and system. Background Art

[0002] Due to the existence of many incorrect, missed connections, breakages and damages in the rainwater pumping station pipeline network, there are many cases of mixed flow of rainwater and sewage in the pipeline network, and black discharge in the rainwater pipes is frequent.

[0003] During heavy rainfall, black, smelly sediments in the pipe network enter the stormwater pumping station along with the rainwater. These black, smelly sediments mix with the water in the pumping station, causing the suspended solids content in the water to exceed the standard, making the water appear black. Furthermore, because the black, smelly sediments consume a large amount of dissolved oxygen, the dissolved oxygen content in the water is extremely low, which in turn causes the water to stink.

[0004] Existing filtration equipment and filtration processes have the following problems: the filter screen is easily clogged, the flux is low, the filtration efficiency is low; and the pollutants cannot be quickly decomposed; so the odor of the water body cannot be effectively solved.

[0005] Therefore, it is necessary to design a micro-flocculation super-flux catalytic filtration treatment process and system. Summary of the Invention

[0006] In order to solve the technical problem of "how to quickly filter and decompose pollutants in water while ensuring that the filter is not easily clogged and has super flux", the present invention provides the following technical solutions: In a first aspect, the present invention provides a micro-flocculation superflux catalytic filtration treatment process, comprising the following steps: S1. Adding biogel to multiple parallel reaction tanks for collecting rainwater and sewage. After stirring and mixing, the biogel absorbs and aggregates suspended matter in the water, forming flocs. The water containing the flocs flows into the micro-flocculation superflux catalytic filtration system. S2. The water containing flocs enters the rotary filter of the micro-flocculation superflux catalytic filtration system. The rotary filter rotates to filter the water, trapping solid particles and achieving effective solid-liquid separation in the suspension. At the same time, the backwash pump of the micro-flocculation superflux catalytic filtration system is started. The backwash pump extracts filtered water to backwash the drum filter. The washed particulate matter is collected by the backwash water collection tank inside the drum filter and discharged through the sewage pipe. At the same time, the ultraviolet lamp in the micro-flocculation super-flux catalytic filtration system is turned on to irradiate the nano-scale catalytic material coated on the surface of the rotary drum filter to remove the pollutants remaining on the rotary drum filter.

[0007] In a second aspect, the present invention provides a micro-flocculation ultra-flux catalytic filtration treatment system, comprising a filtration unit, a backwash unit, and a drive unit; The filter unit is used to filter the water from the reaction tank; the filter unit includes a box body and a rotary drum filter, and the rotary drum filter is arranged inside the box body; Backwash unit, used to flush suspended matter attached to the surface of the drum filter; Drive unit: each filter unit includes an adjustable drive unit, the drive unit includes a reduction drive motor and gears, and the output shaft of the reduction drive motor drives the rotary drum filter to rotate through the drive gear.

[0008] Furthermore, a water inlet and a water outlet are respectively provided at both ends of the box body. The space between the lower part of the rotary drum filter and the box body serves as a bottom bin. The water is filtered through the rotary drum filter from the water inlet, and the filtered water enters the bottom bin and then flows out from the water outlet.

[0009] Furthermore, the inner surface of the rotary drum filter is the filtering water-facing surface, and the inner surface of the rotary drum filter is coated with a nano-scale catalyst layer.

[0010] Furthermore, the catalyst layer uses titanium oxide nano-scale catalytic material.

[0011] Furthermore, an ultraviolet lamp is provided in the box, and the catalyst completes an instantaneous catalytic reaction under the irradiation of the ultraviolet lamp.

[0012] Furthermore, the rotary drum filter is installed in the box body, and the rotary drum filter includes a rotary drum frame and a plurality of filter segments, and the plurality of filter segments are detachably installed on the rotary drum frame.

[0013] Furthermore, the backwash unit includes a backwash water pump, a backwash water pipe and a backwash nozzle, a backwash water collecting tank, and a sewage pipe; the backwash water pump is arranged on one side of the water outlet, the backwash water pump is connected to the bottom bin, the backwash water pump is connected to multiple backwash nozzles through the backwash water pipe, the backwash nozzles are distributed above the outside of the rotary drum filter, the backwash water collecting tank is arranged at the top inside the rotary drum filter, and the backwash water collecting tank is connected to the sewage pipe.

[0014] Furthermore, the backwash nozzle adopts a high-pressure umbrella-shaped backwash nozzle.

[0015] Furthermore, the rotary drum filter is made of 316L stainless steel.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention uses multiple parallel reaction tanks for synchronous processing; using biogel, the black and odorous water body is lifted into the high-throughput catalytic filtration system after flocculation and precipitation, and most of the suspended matter is filtered out through the internal rotary drum filter, the water body is preliminarily deblackened, and the suspended matter removal rate in the water body is improved.

[0017] The present invention filters and decomposes pollutants in water bodies. The photocatalytic reaction speed is fast, and the colloidal suspension particles formed are large and stable, and are not easily broken by impact. The rotary drum filter structure is coated with titanium oxide nanomaterials on the surface, and photocatalysis is simultaneously set to quickly decompose attached pollutants, ensuring the super-flux characteristics of the system, improving the super-flux and filtration efficiency, ensuring that the filter screen is not easily clogged, and there is no black and smelly water in the pipe network. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a process flow chart of the micro-flocculation superflux catalytic filtration process of the present invention; Figure 2 This is one of the structural schematic diagrams of the micro-flocculation superflux catalytic filtration system of the present invention; Figure 3 This is the second structural diagram of the micro-flocculation superflux catalytic filtration system of the present invention; Figure 4 This is the third structural diagram of the micro-flocculation superflux catalytic filtration system of the present invention; Figure 5 This is a working flow chart of the micro-flocculation superflux catalytic filtration system of the present invention.

[0019] Reference numerals: 11 housing; 12 drum filter; 121 filter slices; 122 drum frame; 13 water inlet; 14 water outlet; 15 bottom bin; 21 backwash water pump; 22 backwash water pipe; 23 backwash nozzle; 24 backwash water collection tank; 25 sewage pipe; 26 flushing pipe bracket; 31 reduction drive motor; 33 ring gear; 34 pinion; 35 pinion shaft; 36 shaft support; 32 rotating shaft; DETAILED DESCRIPTION The technical solution of the present invention will be clearly described below in conjunction with the accompanying drawings. Obviously, the described embodiments are not all embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0020] It should be noted that the terms "center", "up", "down", "horizontal", "left", "right", "front", "back", "lateral", "longitudinal", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0021] Example 1 Combine Figure 1-4 As shown, the present invention provides a micro-flocculation superflux catalytic filtration treatment process, comprising the following steps: S1. Adding biogel to multiple parallel reaction tanks for collecting rainwater and sewage. After stirring and mixing, the biogel absorbs and aggregates suspended matter in the water, forming flocs. The water containing the flocs flows into the micro-flocculation superflux catalytic filtration system. S2. The micro-flocculation superflux catalytic filtration system uses mechanical filtration, allowing water containing flocs to enter the system's rotary filter. The rotary filter rotates to filter the water, trapping solid particles and effectively separating the solid and liquid in the suspension to produce purified water. At the same time, the backwash pump is started to draw filtered water from the drum filter to backwash the drum filter. The washed particulate matter is collected by the backwash water collection tank inside the drum filter, and the backwash water with particulate matter is discharged through the sewage pipe. At the same time, the ultraviolet lamp in the micro-flocculation super-flux catalytic filtration system is turned on to irradiate the nano-scale catalytic material coated on the surface of the rotary drum filter to perform ultraviolet photocatalysis and remove the pollutants remaining on the filter.

[0022] The micro-flocculation superflux catalytic filtration system operates continuously. When water enters the drum filter, it rotates and simultaneously activates the backwash pump. The drum filter begins to slowly rotate, and the backwash pump draws filtered water to backwash the filter. Particulate matter washed away is collected in the backwash water collection tank inside the drum filter and discharged through the sewage pipe.

[0023] Backwashing and filtration are performed simultaneously. The drum filter automatically stops when no water passes through it. The drum filter is coated with a nano-catalytic material that is catalytic against pollutants. This nano-catalytic material is calcined onto the drum filter and then irradiated with UV light to create an instantaneous catalytic reaction, removing any remaining pollutants, significantly improving both throughput and filtration efficiency.

[0024] Example 2 Combine Figure 2-5As shown, the present invention provides a micro-flocculation super-flux catalytic filtration system, which includes a filtration unit, a backwash unit, a drive unit, and an electrical automatic control unit.

[0025] The filter unit is used to filter the water from the reaction tank. The filter unit includes a box 11 and a rotary filter 12.

[0026] The rotary drum filter 12 is installed inside the box 11, which is made of 304 stainless steel. The two ends of the box 11 are respectively provided with a water inlet 13 and a water outlet 14. The filtration unit occupies a small area. Under the condition of the same water treatment volume, the area occupied by the filtration unit is much smaller than that of other filtration process equipment. The area occupied for every thousand tons of water treatment is about 20m 2 ; Small footprint, easy installation, low-speed operation, automatic protection, and fully automatic continuous operation.

[0027] The drum filter 12 is made of 316L stainless steel, offering excellent corrosion resistance and a long service life of up to 10 years. It is the core component of the water filter. Water enters the drum filter 12 through the water inlet 13 of the housing 11, where it removes pollutants such as suspended solids, particulate matter, and organic matter.

[0028] Combine Figure 3-Figure 4 As shown, the rotary filter 12 is open at both ends and has no internal shaft. It includes a drum frame 122 and a plurality of filter segments 121, which are removably mounted to the drum frame 122 via bolts. The filter segments 121 have an arched structure, and each filter segment 121 can be independently installed and removed without affecting other filter segments 121.

[0029] A ring gear 33 is mounted on the inner circumference of each end of the drum frame 122. A pinion gear 34 is meshed with the inner side of each ring gear 33. The pinion gear 34 is rotatably mounted on the end of a pinion shaft 35 and meshes with the ring gear 33. The pinion shaft 35 at each end is fixed to a shaft bracket 36 adjacent to the pinion gear 34, with the axial axis of the pinion shaft 35 parallel to the axial axis of the drum filter 12. The shaft bracket 36 is fixed to the bottom of the housing 11.

[0030] A rotating shaft 32 is connected between the tops of the shaft supports 36 at both ends of the drum skeleton 122 . The rotating shaft 32 is disposed through the axial center of the drum filter 12 .

[0031] The pinion shaft 35 at each end is in transmission connection with the corresponding end of the rotating shaft 32. The pinion shaft 35 at the water outlet is connected to the output shaft of the reduction drive motor 31.

[0032] The reduction drive motor 31 moves, driving the small gear 34 on the same side to rotate, and then driving the ring gear 33 on the same side to rotate; at the same time, it drives the rotating shaft 32 to rotate, and then drives the small gear 34 on the side away from the reduction drive motor 31 to rotate, and drives the ring gear 33 on the corresponding side to rotate; thereby, the rotary drum filter 12 rotates.

[0033] The rotary drum filter 12 can adopt a variety of aperture combinations to achieve high water flux and high filtering accuracy.

[0034] The space between the lower portion of the rotary drum filter 12 and the housing 11 serves as a bottom bin 15 . The filtered water passing through the rotary drum filter 12 enters the bottom bin 15 and then flows out from the water outlet 14 .

[0035] The inner surface of the rotary filter 12 is the filtering water-facing surface and has the function of effectively collecting dirt.

[0036] The inner surface of the drum filter 12 is coated with a nano-scale catalyst layer. The catalyst layer utilizes a titanium oxide nano-catalytic material. This catalyst layer is used to catalyze residue adhering to the drum filter 12, preventing clogging of the drum filter 12. The nano-catalytic material coated on the drum filter 12 catalytically degrades pollutants. When fluid passes through the drum filter 12, pollutants are adsorbed on the surface of the nano-catalytic material and, under the action of the catalyst, undergo a chemical reaction, transforming them into harmless substances. This reduces the accumulation of pollutants on the drum filter 12 and clogging, thereby improving filtration throughput.

[0037] An ultraviolet lamp is provided on the top of the box 11. Under the irradiation of the ultraviolet lamp, the catalyst completes an instantaneous catalytic reaction, quickly decomposing the pollutants attached to the rotary drum filter 12, removing the pollutants, and greatly improving the flux and filtration efficiency.

[0038] The coating of the rotary filter 12 with nano-scale catalytic materials can increase the material transfer rate: the nano-scale catalytic materials have extremely small particle sizes, which makes the transfer path of pollutants on the nano-scale catalytic materials shorter and the diffusion rate faster.

[0039] The microstructure of the surface of nano-scale catalytic materials can also provide more adsorption sites, enhance the adsorption and diffusion ability of substances on nano-scale catalytic materials, accelerate the transfer rate of pollutants, and thus increase the filtration flux.

[0040] Nano-scale catalytic materials have a large specific surface area and abundant active sites, providing more reactive sites and accelerating the catalytic reaction. When pollutants pass through the rotary drum filter 12, the nano-scale catalytic materials can efficiently catalyze their decomposition or conversion, accelerating the degradation rate of pollutants and thus improving filtration throughput.

[0041] Nano-catalytic materials generally have good hydrophilicity. Coating them on the drum filter can make the surface of the drum filter more hydrophilic. This hydrophilicity can reduce the adsorption of pollutants on the drum filter surface and reduce the clogging of pollutants on the drum filter, thereby improving the filtration flux.

[0042] Nanoscale catalytic materials can exhibit selective catalysis, meaning they possess high catalytic activity against specific pollutants. This is because the structure and composition of the nanoscale catalytic coating can be designed and manipulated to achieve specific catalytic activity and selectivity. This selective catalysis can achieve efficient degradation or conversion of specific pollutants, enhancing the catalytic performance of the catalytic material against pollutants.

[0043] The backwash unit is used to flush the suspended matter attached to the surface of the drum filter 12, to avoid the clogging of the drum filter 12 by the sediment intercepted by the over-flushing drum filter 12 after the catalytic reaction, and to continuously maintain the high-throughput effect of flushing the drum filter 12.

[0044] The backwash unit includes a backwash pump 21, a backwash pipe 22, backwash nozzles 23, a backwash water collection tank 24, and a sewage pipe 25. The backwash pump 21 is located on one side of the water outlet 14 and is connected to the bottom bin 15. The backwash pump 21 is connected to multiple backwash nozzles 23 via the backwash pipe 22. The top of the backwash pipe 22 is located below the top of the tank 11 via a flushing pipe bracket 26. The backwash nozzles 23 are distributed above the rotary drum filter 12. The backwash water collection tank 24 is connected to the sewage pipe 25.

[0045] The backwash water collecting tank 24 passes through both ends to flush the interior of the rotary drum filter 12 , and both ends are connected to the box body 11 respectively.

[0046] The backwash nozzle 23 adopts a high-pressure umbrella-shaped nozzle.

[0047] The backwash water collecting tank 24 is disposed at the top of the rotary drum filter 12 .

[0048] Backwash pump 21 draws filtered water from bottom silo 15 at outlet 14 and flushes the drum filter 12 from the outside inward via backwash nozzle 23, removing suspended solids that accumulate on the inner surface of the drum filter during filtration. The number and duration of backwashes are adjustable, ensuring normal self-cleaning and sludge removal processes remain unaffected. Filtration can operate continuously, with backwashing and filtration independently of each other.

[0049] Backwashing uses filtered water as the water source, without the need for external water sources. The daily water consumption should not exceed 0.3% of the daily treated water volume. Continuous operation is required, and intermittent backwashing is not used to ensure the backwashing effect and prevent dirt from accumulating on the filter. Chemical cleaning is not allowed.

[0050] Drive unit: Each filter unit includes an adjustable drive unit, which includes a reduction drive motor 31, gears including a ring gear 33 and a pinion 34, and the power supply of the reduction drive motor 31 adopts 380V / 50Hz / 3-phase AC.

[0051] The electrical control unit, including the electrical control cabinet, operates fully automatically when the micro-flocculation superflux catalytic filtration system is operating normally. It uses a programmable logic controller (PLC) and has two control modes: manual and automatic. The electrical control unit centrally controls the micro-filtration unit's drive unit and backwash unit.

[0052] The electrical control unit also includes an electrode / static pressure level gauge to monitor the operating liquid level in the reaction tank. The local PLC also has a reserved communication interface with the host computer, which uploads the operating status of each device to the central control for remote monitoring.

[0053] Working process: Rainwater and sewage are collected in a reaction tank, and biogel is added to the reaction tank. After stirring and mixing, it quickly absorbs and aggregates suspended matter in the water to form solid and stable flocs, which then flow into the micro-flocculation super-flux catalytic filtration system along with the water. When the water in the reaction tank enters the drum filter through the water inlet of the box, the electrical automatic control unit will start the drive unit to drive the drum filter to rotate and start the backwash pump at the same time.

[0054] The drum filter starts to rotate slowly, and the backwash pump draws filtered water from the bottom bin to backwash the drum filter; The washed particulate matter is collected by the backwash water collection tank inside the drum filter and discharged from the equipment through the drain pipe.

[0055] The filtration is running normally while backwashing. When no water passes through the drum filter, the drum filter stops automatically.

[0056] The above technical features constitute the best embodiment of the present invention, which has strong adaptability and best implementation effect. Non-essential technical features can be added or removed according to actual needs to meet the needs of different situations.

[0057] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Simple modifications or equivalent substitutions of the technical solution of the present invention by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the present invention.

Claims

1. A micro-flocculation superflux catalytic filtration treatment process, characterized in that: The steps include: S1. Adding biogel to multiple parallel reaction tanks for collecting rainwater and sewage. After stirring and mixing, the biogel absorbs and aggregates suspended matter in the water, forming flocs. The water containing the flocs flows into the micro-flocculation superflux catalytic filtration system. S2. The water containing flocs enters the rotary filter of the micro-flocculation superflux catalytic filtration system. The rotary filter rotates to filter the water, trapping solid particles and achieving effective solid-liquid separation in the suspension. At the same time, the backwash pump of the micro-flocculation superflux catalytic filtration system is started. The backwash pump extracts filtered water to backwash the drum filter. The washed particulate matter is collected by the backwash water collection tank inside the drum filter and discharged through the sewage pipe. At the same time, the ultraviolet lamp in the micro-flocculation super-flux catalytic filtration system is turned on to irradiate the nano-scale catalytic material coated on the surface of the rotary drum filter to remove the pollutants remaining on the rotary drum filter.

2. A micro-flocculation superflux catalytic filtration treatment system, characterized in that: Including filter unit, backwash unit and drive unit; The filter unit is used to filter the water from the reaction tank; the filter unit includes a box body and a rotary drum filter, and the rotary drum filter is arranged inside the box body; Backwash unit, used to flush suspended matter attached to the surface of the drum filter; Drive unit: each filter unit includes an adjustable drive unit, the drive unit includes a reduction drive motor and gears, and the output shaft of the reduction drive motor drives the rotary drum filter to rotate through the drive gear.

3. The micro-flocculation superflux catalytic filtration treatment system according to claim 2, characterized in that: There are water inlet and water outlet at both ends of the box respectively. The space between the lower part of the rotary drum filter and the box serves as the bottom bin. The water is filtered through the rotary drum filter from the water inlet, and the filtered water enters the bottom bin and then flows out from the water outlet.

4. The micro-flocculation superflux catalytic filtration treatment system according to claim 2, characterized in that: The inner surface of the rotary drum filter is the filtering water-facing surface, and the inner surface of the rotary drum filter is coated with a nano-scale catalyst layer.

5. The micro-flocculation superflux catalytic filtration treatment system according to claim 4, characterized in that: The catalyst layer adopts titanium oxide nano-scale catalytic material.

6. The micro-flocculation superflux catalytic filtration treatment system according to claim 4, characterized in that: An ultraviolet lamp is arranged in the box, and the catalyst completes an instantaneous catalytic reaction under the irradiation of the ultraviolet lamp.

7. The micro-flocculation superflux catalytic filtration treatment system according to claim 2, characterized in that: The rotary drum filter is installed in the box body. The rotary drum filter comprises a rotary drum frame and a plurality of filter segments. The plurality of filter segments are detachably installed on the rotary drum frame.

8. The micro-flocculation superflux catalytic filtration treatment system according to claim 2, characterized in that: The backwash unit includes a backwash water pump, a backwash water pipe and a backwash nozzle, a backwash water collecting tank, and a sewage pipe; the backwash water pump is arranged on one side of the water outlet, the backwash water pump is connected to the bottom bin, the backwash water pump is connected to multiple backwash nozzles through the backwash water pipe, the backwash nozzles are distributed above the outside of the rotary drum filter, the backwash water collecting tank is arranged at the top inside the rotary drum filter, and the backwash water collecting tank is connected to the sewage pipe.

9. The micro-flocculation superflux catalytic filtration treatment system according to claim 8, characterized in that: The backwash nozzle adopts a high-pressure umbrella-shaped backwash nozzle.

10. The micro-flocculation superflux catalytic filtration treatment system according to claim 2, characterized in that: The drum filter is made of 316L stainless steel.

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