High efficiency anti-pollution wastewater tubular membrane treatment device

Abstract

The utility model discloses a kind of efficient anti-pollution wastewater tubular membrane processing device, to provide a kind of tubular membrane processing device of efficient wastewater treatment, its technical solution main point is, including pretreatment unit, the pretreatment unit includes the regulating pool, jet aeration device and filter tank communicated in turn, the filter tank is also provided with tubular membrane assembly, the tubular membrane assembly includes membrane shell, tubular membrane pipe spare and two ends water inlet and water production mouth arranged in parallel, spiral flow guide protrusion is equipped in the tubular membrane pipe spare inner wall, the tubular membrane pipe spare both ends are connected by quick-release type sealing structure with water collector.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment equipment, specifically to a high-efficiency, pollution-resistant tubular membrane treatment device for wastewater. Background Technology

[0002] Tubular membrane devices are made by attaching a separation membrane to the outer wall of a porous cylindrical tube, such as sintered polyethylene, or to the central hole of the tube, thus creating an external tubular fitting. Alternatively, internal pressure tubular fittings can be assembled by fitting these tubular components into a pressure-resistant sleeve. Based on the pressure required for the membrane separation process, and matched with other equipment, a tubular membrane device is assembled. Advantages include good flow of the feed liquid within the module, convenient membrane replacement, suitability for separating highly turbid liquids, and the ability to mechanically clean membrane surface fouling. However, the membrane packing density is low, resulting in higher initial investment and energy consumption.

[0003] Currently, Chinese patent CN119409284B discloses a wastewater treatment device based on a tubular membrane, including an outer tube and a tubular membrane body located inside the outer tube. The surface of the outer tube is provided with an inlet pipe and an outlet pipe, and one end of the outer tube is provided with an end cap. One end of the tubular membrane body is fixedly connected to the end cap, and a fixing ring is provided inside the outer tube for the other end of the tubular membrane body to be fitted.

[0004] Although this wastewater treatment device based on tubular membranes works in concert with the drive and sealing components, and the piston movement is controlled by the screw and threaded cylinder to seal the connecting pipe, the piston movement creates negative pressure in the cavity near the outer pipe, thereby accelerating the filtration process of wastewater in the tubular membrane body by utilizing the transmembrane pressure difference and improving wastewater treatment efficiency, while avoiding damage to the membrane due to excessive pressure difference and extending the service life of the tubular membrane body, membrane fouling is a prominent problem. Colloidal substances and organic matter in the wastewater are prone to deposit on the membrane surface or block the membrane pores, resulting in a rapid decline in membrane flux and requiring frequent shutdowns for cleaning. Summary of the Invention

[0005] The purpose of this invention is to provide a high-efficiency, pollution-resistant tubular membrane treatment device for wastewater, which has the advantages of efficiently removing impurities from wastewater and improving wastewater treatment efficiency.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: A high-efficiency, pollution-resistant tubular membrane treatment device for wastewater includes a pretreatment unit. The pretreatment unit comprises an equalization tank, a jet aeration device, and a filter tank connected in sequence. The filter tank is also connected to a tubular membrane module via a water collection pipe. The tubular membrane module includes a membrane shell, parallel tubular membrane fittings, and inlet and outlet water outlets at both ends. The inner wall of the tubular membrane fittings is provided with spiral flow guiding protrusions. The two ends of the tubular membrane fittings are connected to the water collection pipe through a quick-release sealing structure.

[0007] Further configuration: The air inlet of the jet aeration device is connected to an ozone generator, and the filter tank is provided with a quartz sand filter layer and an activated carbon filter layer from top to bottom.

[0008] Further configuration: The quick-release sealing structure includes a sealing sleeve located on the water collection pipe and threadedly connected to the tubular membrane fitting, the sealing sleeve being provided with a locking ring, and an elastic sealing ring being provided on the inner wall of the connection between the tubular membrane fitting and the water collection pipe.

[0009] Further configuration: The tubular membrane module is also equipped with an online cleaning unit, which includes a chemical cleaning tank connected to the tubular membrane module through a cleaning pipeline. A bidirectional flushing pump is also provided on the online cleaning pipeline. The bidirectional flushing pump is connected to the inlet and outlet of the tubular membrane module through the cleaning pipeline. The chemical cleaning tank is divided into acid and alkali compartments by a partition plate. A connecting valve is provided at the bottom of the chemical cleaning tank.

[0010] Further configuration: The tubular membrane module is also equipped with an automatic control unit, which includes a flow sensor and a pressure sensor respectively installed at the inlet and outlet, and a PLC controller connected to the flow sensor and the pressure sensor.

[0011] In summary, this utility model has the following beneficial effects: Significantly improved anti-fouling performance: The spiral guide protrusion design on the inner wall of the membrane tube enhances fluid turbulence, reduces pollutant adsorption and deposition, lowers the membrane fouling rate, and extends the continuous operation cycle; Excellent cleaning effect: The bidirectional flushing pump combined with the acid-alkali partitioned cleaning tank achieves coordinated operation of forward physical flushing and reverse chemical cleaning, eliminating the need for frequent disassembly of the membrane module; Convenient disassembly and maintenance: The quick-release sealing structure replaces the traditional flange connection, shortening the membrane element disassembly and assembly time and significantly reducing maintenance labor intensity; Improved pretreatment effect: The combined process of "ozone oxidation + dual-layer filtration" can remove 30-40% of COD and more than 90% of suspended particulate matter, reducing the risk of membrane fouling from the source. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings.

[0013] Figure 1 This is a schematic diagram of the overall structure of a high-efficiency, pollution-resistant tubular membrane treatment device for wastewater. Figure 2 This is a schematic diagram of the internal structure of a tubular membrane module in a high-efficiency, pollution-resistant tubular membrane treatment device for wastewater. Figure 3 This is an exploded schematic diagram of the quick-release sealing structure of a high-efficiency, pollution-resistant tubular membrane treatment device for wastewater. Figure 4 This is a schematic diagram of the cross-section of the tubular membrane fittings in a high-efficiency, pollution-resistant tubular membrane treatment device for wastewater.

[0014] In the diagram, 1. Pretreatment unit; 2. Equalization tank; 3. Jet aeration device; 4. Filter tank; 5. Tubular membrane module; 51. Membrane shell; 52. Tubular membrane fitting; 53. Inlet; 54. Product outlet; 6. Spiral guide protrusion; 7. Quick-release sealing structure; 71. Sealing sleeve; 72. Locking ring; 73. Elastic sealing ring; 8. Ozone generator; 9. Quartz sand filter layer; 10. Activated carbon filter layer; 11. Online cleaning unit; 112. Chemical cleaning tank; 113. Two-way flushing pump; 114. Isolation plate; 115. Connecting valve; 12. Automatic control unit; 121. Flow sensor; 122. Pressure sensor; 123. PLC controller; 13. Water collection pipe. Detailed Implementation

[0015] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0016] A high-efficiency, pollution-resistant tubular membrane treatment device for wastewater, such as Figure 1 As shown, it includes a pretreatment unit 1, which comprises an equalization tank 2, a jet aeration device 3, and a filter tank 4 connected in sequence. The filter tank 4 is also connected to a tubular membrane module 5 via a water collection pipe 13. Figure 2 , Figure 3 and Figure 4 As shown, the tubular membrane module 5 includes a membrane housing 51, parallel tubular membrane fittings 52, and inlet 53 and outlet 54 at both ends. The inner wall of the tubular membrane fitting 52 has spiral guide protrusions 6. Both ends of the tubular membrane fitting 52 are connected to the water collection pipe 13 via a quick-release sealing structure 7. The air inlet of the jet aeration device 3 is connected to an ozone generator 8. The filter tank 4 contains a quartz sand filter layer 9 and an activated carbon filter layer 10 from top to bottom. The quick-release sealing structure 7 includes a sealing sleeve 71 located on the water collection pipe 13 and threadedly connected to the tubular membrane fitting 52. The sealing sleeve 71 has a locking ring 72. An elastic sealing ring 73 is also provided on the inner wall of the connection between the tubular membrane fitting 52 and the water collection pipe 13. The tubular membrane module 5 also has... There is an online cleaning unit 11, which includes a chemical cleaning tank 112 connected to the tubular membrane module 5 via a cleaning pipeline. A bidirectional flushing pump 113 is also provided on the online cleaning pipeline. The bidirectional flushing pump 113 is connected to the inlet 53 and the product water outlet 54 of the tubular membrane module 5 via the cleaning pipeline. The chemical cleaning tank 112 is divided into acid and alkali partition chambers by a partition plate 114. At the same time, a connecting valve 115 is provided at the bottom of the chemical cleaning tank 112. An automatic control unit 12 is also provided on the tubular membrane module 5. The automatic control unit 12 includes a flow sensor 121 and a pressure sensor 122 respectively installed at the inlet 53 and the product water outlet 54, and a PLC controller 123 connected to the flow sensor 121 and the pressure sensor 122.

[0017] Its main working principle is as follows: Pretreatment stage: Wastewater is sent to equalization tank 2, and after stirring and pH adjustment, it enters the jet aeration zone, where it is fully mixed with ozone generated by ozone generator 8 to oxidize and degrade recalcitrant organic matter and destroy colloidal stability; the oxidized wastewater enters filter tank 4, where suspended particulate matter is removed by quartz sand filter layer 9, and then organic matter and odor are adsorbed by activated carbon filter layer 10. Membrane separation stage: The pretreated wastewater is sent to tubular membrane module 5 through feed pump. Under pressure, water molecules and small molecules pass through the membrane pores to form permeate, which is discharged through permeate outlet 54. The retained large molecular pollutants and suspended solids are returned to equalization tank 2 for recycling along with the concentrate through the concentrate pipeline on tubular membrane module 5. Online cleaning phase: When pressure sensor 122 detects an increase in the inlet water pressure of the membrane module, or flow sensor 121 detects a decrease in the permeate flow rate, PLC controller 123 automatically starts the cleaning program: ① Forward physical flushing: Close the feed pump and concentrate valve, and start the bidirectional flushing pump 113; ② Reverse chemical acid washing: Switch the bidirectional flushing pump 113 to reverse mode, turn on the acid chamber reagent metering pump, inject citric acid solution into the cleaning pipeline, and perform reverse circulation cleaning. The cleaning solution volume is 1.8 times the membrane module volume; ③ Reverse chemical alkaline washing: Turn off the acid reagent pump, turn on the alkaline chamber reagent metering pump, and inject an alkaline mixed solution for reverse circulation cleaning; After cleaning, discharge the waste liquid to the drain outlet, start the feed pump to restore membrane separation operation, and at this time the membrane flux is restored. Permeate water discharge: The turbidity sensor at the permeate outlet 54 monitors the permeate water quality in real time and automatically opens the discharge valve to achieve compliant discharge; If the water quality does not meet the standards, the permeate water is sent back to the equalization tank 2 for reprocessing through the return pipeline.

[0018] The above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model shall fall within the scope of the utility model's technical solution.

Claims

1. A high-efficiency, pollution-resistant tubular membrane treatment device for wastewater, characterized in that: The pretreatment unit (1) includes a regulating tank (2), a jet aeration device (3) and a filter tank (4) connected in sequence. The filter tank (4) is also connected to a tubular membrane module (5) through a water collection pipe (13). The tubular membrane module (5) includes a membrane shell (51), a parallel tubular membrane fitting (52) and an inlet (53) and a product outlet (54) at both ends. The inner wall of the tubular membrane fitting (52) is provided with a spiral guide protrusion (6). The two ends of the tubular membrane fitting (52) are connected to the water collection pipe (13) through a quick-release sealing structure (7).

2. The high-efficiency anti-fouling wastewater tubular membrane treatment device according to claim 1, characterized in that: The air inlet of the jet aeration device (3) is connected to the ozone generator (8), and the filter tank (4) is provided with a quartz sand filter layer (9) and an activated carbon filter layer (10) from top to bottom.

3. The high-efficiency anti-fouling wastewater tubular membrane treatment device according to claim 2, characterized in that: The quick-release sealing structure (7) includes a sealing sleeve (71) located on the water collection pipe (13) and threadedly connected to the tubular membrane fitting (52). The sealing sleeve (71) is provided with a locking ring (72). An elastic sealing ring (73) is also provided on the inner wall of the connection between the tubular membrane fitting (52) and the water collection pipe (13).

4. The high-efficiency anti-fouling wastewater tubular membrane treatment device according to claim 3, characterized in that: The tubular membrane module (5) is also provided with an online cleaning unit (11). The online cleaning unit (11) includes a chemical cleaning tank (112) connected to the tubular membrane module (5) through a cleaning pipeline. A bidirectional flushing pump (113) is also provided on the online cleaning pipeline. The bidirectional flushing pump (113) is connected to the inlet (53) and the product water outlet (54) of the tubular membrane module (5) through the cleaning pipeline. The chemical cleaning tank (112) is divided into acid and alkali partitioned chambers by a partition plate (114). A connecting valve (115) is provided at the bottom of the chemical cleaning tank (112).

5. The high-efficiency anti-fouling wastewater tubular membrane treatment device according to claim 4, characterized in that: The tubular membrane module (5) is also provided with an automatic control unit (12), which includes a flow sensor (121) and a pressure sensor (122) respectively located at the inlet (53) and the outlet (54), and a PLC controller (123) connected to the flow sensor (121) and the pressure sensor (122).

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