Multi-stage reclaimed water recycling equipment

Abstract

The utility model discloses multi-stage reclaimed water recycling equipment which is characterized by comprising a tank body, and the tank body is sequentially connected with a rotary rough filtration component, a fine filtration component and a rotary membrane component; the rotary rough filtration assembly comprises a rotatable stainless steel filter cartridge, a spiral flow deflector is arranged in the stainless steel filter cartridge, and a dirt collecting groove is formed in the outer side of the bottom of the stainless steel filter cartridge; the fine filtration assembly comprises an activated carbon filter element and multiple layers of filter screens, the multiple layers of filter screens are arranged in a stacked mode, and the hole diameters of filter holes in the multiple layers of filter screens are gradually decreased layer by layer; the rotating membrane module comprises a hollow fiber membrane. The utility model provides the multi-stage reclaimed water recycling equipment with efficient filtering and self-cleaning functions, the filtering efficiency and effect are improved through structure optimization, and the impurity cleaning process is simplified.

Description

Technical Field

[0001] This utility model relates to the field of water treatment technology, specifically to a multi-stage greywater reuse device. Background Technology

[0002] Greywater, in contrast to water supply and drainage, refers to the centralized treatment of domestic wastewater (bathing, washing, laundry, kitchen, toilet) from residential communities. After reaching certain standards, it is reused for purposes such as watering green spaces, washing vehicles, washing roads, and flushing toilets, thereby achieving water conservation. It reduces environmental pollution and increases the amount of usable water resources. Multi-stage greywater reuse equipment is specialized equipment used to reuse treated greywater. It primarily improves the quality of greywater through a series of treatment steps to meet reuse requirements.

[0003] Existing greywater reuse equipment mostly adopts a series multi-stage filtration structure, which has problems such as easy clogging of filter screens, high water flow resistance, and low filtration efficiency due to the need for frequent shutdowns for cleaning. At the same time, because each stage of the filtration unit has a single function, it cannot adapt to complex water quality, resulting in unstable filtration effect. Furthermore, the filter screens or filter cartridges of existing greywater reuse equipment are often difficult to disassemble, making the cleaning process time-consuming, affecting the continuity of the system, and making equipment maintenance inconvenient. Utility Model Content

[0004] In view of the shortcomings of the existing technology, this utility model aims to provide a multi-stage greywater reuse device with efficient filtration and self-cleaning functions. It improves filtration efficiency and effect through structural optimization and simplifies the impurity cleaning process.

[0005] The present invention provides a multi-stage greywater reuse device, which includes a tank body, wherein a rotary coarse filter assembly, a fine filter assembly, and a rotary membrane assembly are sequentially connected to the tank body.

[0006] The rotary coarse filtration assembly includes a rotatable stainless steel filter cartridge with a built-in spiral guide vane and a dirt collection trough on the outer side of the bottom of the stainless steel filter cartridge; the fine filtration assembly includes an activated carbon filter element and a filter screen, the filter screen having multiple layers, the multiple layers of filter screen being stacked and the pore size of the filter pores on the multiple layers of filter screen decreasing layer by layer; the rotary membrane assembly includes a hollow fiber membrane.

[0007] Furthermore, a vibrator is connected to the surface of the hollow fiber membrane.

[0008] Furthermore, a pre-filter assembly is added in front of the rotary coarse filter assembly, the pre-filter assembly including an inclined vibrating screen and a cleaning scraper.

[0009] Furthermore, the sludge collection tank is connected to an automatic sludge discharge device, which includes a sludge concentration sensor and an electromagnetic sludge discharge valve. When the sludge concentration sensor detects that the sludge concentration is greater than a preset threshold, the electromagnetic sludge discharge valve will automatically open to discharge sludge.

[0010] Furthermore, the rotary coarse filter assembly, the fine filter assembly, and the rotary membrane assembly are all equipped with flushing nozzles. The flushing nozzles are connected to a water storage tank and a micro booster pump, and the flushing is triggered by a pressure sensor.

[0011] Furthermore, the rotary coarse filter assembly, the fine filter assembly, and the rotary membrane assembly are all equipped with quick-release components, which include snap-on flanges.

[0012] The beneficial effects of this utility model are:

[0013] This invention employs a rotating coarse filtration assembly with a rotatable stainless steel filter cartridge containing built-in spiral guide vanes to separate large particles of impurities using centrifugal force, allowing these particles to fall along the cartridge wall into a collection trough located on the outer bottom. A fine filtration assembly, including an activated carbon filter element and multiple layers of filter screens, adsorbs organic matter and intercepts fine suspended solids. A rotating membrane assembly, including a hollow fiber membrane, further filters fine particles. By using three layers of filtration—coarse, fine, and fiber membrane—to progressively increase filtration precision, modular synergistic filtration is achieved to enhance treatment efficiency, thereby effectively improving the filtration effect and increasing the efficiency of greywater reuse. Furthermore, the zoned filtration facilitates targeted treatment of impurities in specific areas. Attached Figure Description

[0014] Figure 1 A cross-sectional structural diagram of a multi-stage greywater reuse device provided by this utility model;

[0015] In the diagram: 1. Tank body; 2. Stainless steel filter cartridge; 3. Sludge collection tank; 4. Activated carbon filter element; 5. Filter screen; 501. Filter hole; 6. Hollow fiber membrane; 7. Vibrator; 8. Inclined vibrating screen; 9. Cleaning scraper; 10. Water inlet pipe; 11. Water outlet pipe. Detailed Implementation

[0016] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0017] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0018] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] like Figure 1 As shown, a multi-stage greywater reuse device of this utility model includes a tank 1, and a rotary coarse filter assembly, a fine filter assembly, and a rotary membrane assembly are sequentially connected to the tank 1.

[0020] The rotary coarse filtration assembly includes a rotatable stainless steel filter cartridge 2, with a built-in spiral guide vane and a dirt collection trough 3 on the outer side of the bottom of the stainless steel filter cartridge 2; the fine filtration assembly includes an activated carbon filter element 4 and a filter screen 5, with multiple layers of filter screen 5 arranged in a stacked manner and the pore size of the filter holes 501 on the multiple layers of filter screen 5 decreasing layer by layer; the rotary membrane assembly includes a hollow fiber membrane 6.

[0021] Specifically, the rotary coarse filtration assembly employs a rotatable stainless steel filter cartridge 2 (pore size 100-200μm) with built-in spiral guide vanes to separate large particles of impurities through centrifugal force. The stainless steel filter cartridge 2 is horizontally placed and has filter holes 501 on its outer wall, allowing impurities to fall along the cartridge wall into the collection tank 3 at the bottom. The spiral guide vanes convert axial water flow into spiral motion, enabling large particles to settle quickly, thus improving the removal rate and reducing clogging. Simultaneously, the spiral flow channel reduces the water flow resistance coefficient, thereby reducing hydraulic losses and power consumption. The spiral guide vanes are welded to the inner wall of the filter cartridge. The collection tank 3 can be a conical tank with an internal polytetrafluoroethylene layer to reduce the coefficient of friction.

[0022] The fine filtration component consists of a superhydrophilic modified activated carbon filter element 4 and a gradient pore size filter screen 5 (50μm→10μm), which can adsorb organic matter and intercept fine suspended solids. Specifically, the gradient filter screen 5 has an outer 50μm stainless steel woven mesh, a middle 20μm nylon melt-blown layer, and an inner 10μm PTFE membrane. This three-stage interception layout of the gradient filter screen 5 achieves synergistic effects of multi-stage retention mechanisms, effectively improving the suspended solids removal rate. Simultaneously, the gradient pore size avoids filter layer compaction, resulting in low operating resistance and reduced pumping energy consumption.

[0023] The rotating membrane module uses a hollow fiber membrane 6 to achieve cross-flow filtration. The rotation of the hollow fiber membrane 6 can be achieved by an internal rotating shaft. The specific rotation setting method is a conventional technology and will not be described in detail here.

[0024] In this embodiment, after the greywater enters the tank 1 through the inlet pipe 10, it flows through the stainless steel filter cartridge 2 for centrifugal separation of large particles, then through the activated carbon filter element 4 and filter screen 5 in the fine filtration assembly for adsorption and gradient filtration, and then through the cyclone membrane assembly for deep desalination, thereby obtaining purified water that flows into the reuse storage tank through the outlet pipe 11.

[0025] This embodiment effectively improves coarse filtration efficiency and reduces subsequent load through a rotatable stainless steel filter cartridge 2 and centrifugal separation. The rotating membrane assembly and gradient filter screen 5 effectively increase the retention rate and reduce effluent turbidity.

[0026] This invention effectively enhances treatment efficiency through the synergistic modular design of three-stage components. It targets different pollutants step-by-step: the primary coarse filtration component intercepts particles larger than 100μm (such as sand and fibers); the secondary fine filtration component adsorbs dissolved organic matter, achieving a COD removal rate of over 85%; and the tertiary rotating membrane component separates and retains colloids and microorganisms, thereby reducing turbidity. Therefore, this invention enables dynamic filtration, significantly improving wastewater reuse efficiency and reducing operation and maintenance costs. Structural optimization enhances filtration efficiency and effectiveness and facilitates flexible adjustment of the process chain. Furthermore, it adapts to complex water quality fluctuations. During periods of heavy rainfall when suspended solids in the influent surge, the coarse filtration component can switch to an enhanced mode, increasing its rotation speed to prevent clogging of subsequent modules. Thus, this invention also improves the system's resistance to shock loads.

[0027] In one alternative embodiment, a vibrator 7 is attached to the surface of the hollow fiber membrane 6.

[0028] Specifically, membrane fouling can be prevented by attaching a vibrator 7 (frequency 20-50Hz) to the membrane surface.

[0029] Among them, the vibrator 7 can be a piezoelectric ceramic actuator.

[0030] This embodiment can suppress concentration polarization through vibration. The 50Hz vibration can create microscale eddies on the membrane surface, thereby increasing water flux. At the same time, the vibration energy acts directly on the membrane fibers, which helps to improve the removal efficiency of colloidal particles (0.1-1μm in diameter), thus reducing the amount of chemical cleaning agents used. In addition, the swirling flow can enhance mass transfer efficiency, and the tangential feed water generates centrifugal acceleration, causing suspended solids to accumulate on the tube wall, thereby reducing the membrane fouling rate.

[0031] In one alternative embodiment, a pre-filter assembly is added in front of the rotating coarse filter assembly. The pre-filter assembly includes an inclined vibrating screen 8 and a cleaning scraper 9.

[0032] Specifically, the inclined vibrating screen 8 can be a stainless steel screen plate (1mm aperture), which can be driven by an eccentric wheel, and the cleaning scraper 9 can be a polyurethane scraper.

[0033] This embodiment can efficiently intercept large-sized impurities. The inclined vibrating screen 8 traps hair and plastic flakes, preventing them from entangled in subsequent equipment and reducing malfunctions. The cleaning scraper 9, working in conjunction with vibration, improves the self-cleaning efficiency of the inclined vibrating screen 8, reducing rinsing water consumption. After removing large or hard particles, the pre-filtration component protects downstream equipment from damage, such as reducing the risk of filament breakage in the rotating membrane assembly.

[0034] In one optional embodiment, the sludge collection tank 3 is connected to an automatic sludge discharge device, which includes a sludge concentration sensor and an electromagnetic sludge discharge valve. When the sludge concentration sensor detects that the sludge concentration is greater than a preset threshold, the electromagnetic sludge discharge valve will automatically open to discharge sludge.

[0035] Specifically, compared with timed sewage discharge, this embodiment can effectively save water through intelligent judgment, reduce water loss through precise sludge discharge, and prevent sludge fermentation in real time to prevent secondary pollution. At the same time, it can reduce the abrasion of pipelines by high-concentration sludge to extend the service life of equipment.

[0036] In one optional embodiment, the rotary coarse filter assembly, the fine filter assembly, and the rotary membrane assembly are all equipped with flushing nozzles. The flushing nozzles are connected to a water storage tank and a micro booster pump, and the flushing is triggered by a pressure sensor.

[0037] Specifically, this embodiment avoids a "one-size-fits-all" cleaning strategy by using an independent backwashing design. This precise rinsing method can effectively save water and rinsing energy.

[0038] In one optional embodiment, the rotary coarse filter assembly, the fine filter assembly, and the rotary membrane assembly are all provided with quick-release components, which include snap-on flanges.

[0039] Specifically, the quick-release structure combined with the guide rail sliding structure in this embodiment enables rapid replacement of any module, thereby reducing repair time and maintenance costs. The snap-fit ​​flange may include a two-part stainless steel flange with a spring lock, and may also be equipped with a fluororubber self-sealing gasket.

[0040] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A multi-stage greywater reuse system, characterized in that, Includes a tank (1), wherein a rotary coarse filter assembly, a fine filter assembly, and a rotary membrane assembly are sequentially connected to the tank (1); The rotating coarse filtration assembly includes a rotatable stainless steel filter cartridge (2), which has a built-in spiral guide vane and a dirt collection trough (3) on the outer side of the bottom of the stainless steel filter cartridge (2); the fine filtration assembly includes an activated carbon filter element (4) and a filter screen (5), which has multiple layers, and the multiple layers of the filter screen (5) are stacked and the pore size (501) on the multiple layers of the filter screen (5) decreases layer by layer; the rotating membrane assembly includes a hollow fiber membrane (6).

2. The multi-stage greywater reuse equipment according to claim 1, characterized in that, A vibrator (7) is connected to the surface of the hollow fiber membrane (6).

3. The multi-stage greywater reuse equipment according to claim 1, characterized in that, A pre-filter assembly is added in front of the rotating coarse filter assembly. The pre-filter assembly includes an inclined vibrating screen (8) and a cleaning scraper (9).

4. A multi-stage greywater reuse device according to claim 1, characterized in that, The sludge collection tank (3) is connected to an automatic sludge discharge device, which includes a sludge concentration sensor and an electromagnetic sludge discharge valve. When the sludge concentration sensor detects that the sludge concentration is greater than a preset threshold, the electromagnetic sludge discharge valve will automatically open to discharge sludge.

5. A multi-stage greywater reuse device according to claim 1, characterized in that, The rotating coarse filter assembly, the fine filter assembly, and the rotating membrane assembly are all equipped with flushing nozzles. The flushing nozzles are connected to a water storage tank and a micro booster pump, and the flushing is triggered by a pressure sensor.

6. A multi-stage greywater reuse device according to claim 1, characterized in that, The rotary coarse filter assembly, the fine filter assembly, and the rotary membrane assembly are all equipped with quick-release components, which include snap-on flanges.

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