A nanofiltration filter

Abstract

The utility model belongs to water treatment technical field, specifically discloses a kind of nanofiltration filter, it includes support frame in it. Raw water booster pump, pretreatment system, high-pressure pump and nanofiltration membrane assembly are sequentially arranged on support frame, and pretreatment system includes multistage filtration unit, and nanofiltration membrane adopts roll type polyamide composite membrane;Intelligent sensing assembly consisting of TDS sensor, flow sensor and the like is equipped on each component connecting pipeline, and intelligent electric valve is mounted on key pipeline, and intelligent sensing assembly and intelligent electric valve are all controlled by PLC system.The filter can realize automatic operation, protect nanofiltration membrane by multistage pretreatment, nanofiltration membrane can retain beneficial mineral in water, energy consumption is low, operating cost is economical, effectively solve many defects of traditional water treatment equipment, applicable to a variety of water purification scene.

Description

Technical Field

[0001] This utility model relates to the field of water treatment technology, specifically to a nanofiltration filter. Background Technology

[0002] With the acceleration of industrialization and the improvement of urbanization, water pollution has become increasingly serious, and the contradiction of uneven distribution of water resources has become more prominent, further exacerbating the pressure on the supply of high-quality drinking water and creating an urgent need for efficient water purification equipment.

[0003] Traditional water treatment equipment has many problems. For example, reverse osmosis technology removes all beneficial minerals from the water while filtering out harmful substances, which does not meet the requirements for healthy drinking water, and the equipment is relatively expensive. Compared with reverse osmosis technology, nanofiltration membranes require lower operating pressure, thus consuming less energy and having more economical operating costs. They also allow small molecules and monovalent ions to pass through, but still suffer from wastewater waste and low automation.

[0004] Therefore, in response to the shortcomings of traditional water purification technologies in terms of user experience and automation, a nanofiltration filter is proposed to address the inability of traditional water treatment equipment to fully adapt to current water quality and intelligent usage requirements. Utility Model Content

[0005] The purpose of this invention is to provide a nanofiltration filter to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0007] A nanofiltration filter includes a support frame. A raw water booster pump is fixedly installed on one side of the support frame. The inlet of the raw water booster pump is connected to a raw water pipeline, and the outlet is connected to a pretreatment system via a pipeline. The pretreatment system includes a quartz sand filter connected to the outlet of the raw water booster pump. The quartz sand filter is sequentially connected to an activated carbon filter and a water softener via pipelines. The bottoms of the quartz sand filter, activated carbon filter, and water softener are aligned with each other and fixed on the support frame in front of the raw water booster pump.

[0008] A soft water tank is fixed to the side of the support frame away from the water softener. The outlet of the water softener is connected to the inlet of the soft water tank via a pipe. A precision filter is fixed to the support frame on the side of the soft water tank away from the raw water booster pump. The outlet of the soft water tank is connected to the inlet of the precision filter via a pipe. The soft water tank and the precision filter are fixed parallel to each other on the support frame, and the precision filter is located directly behind the water softener.

[0009] A high-pressure pump is fixed on the side of the support frame away from the raw water booster pump. The inlet of the high-pressure pump is connected to the outlet of the precision filter through a pipeline. The outlet of the high-pressure pump is connected to the inlet of the nanofiltration membrane assembly through a pipeline. The nanofiltration membrane assembly is fixed on the side of the support frame away from the pretreatment system. The nanofiltration membrane assembly includes a nanofiltration membrane, which is a spiral wound membrane element, and the nanofiltration membrane material is a high-performance polyamide composite membrane.

[0010] Intelligent sensing components are fixedly installed on the connecting pipelines of each component to monitor each stage in real time. The intelligent sensing components include a TDS sensor, a flow sensor, a pressure sensor, and a water temperature sensor. Intelligent electric valves are fixedly installed on the pipeline connecting the raw water booster pump inlet to the raw water pipeline, as well as on the pipelines at the product water outlet and wastewater outlet of the nanofiltration membrane module, to control the water intake, product water, sewage discharge, and flushing processes. The intelligent sensing components and intelligent electric valves are all analyzed, processed, and controlled by a PLC system.

[0011] This invention further explains that the quartz sand filter first removes suspended particles and colloidal substances from the raw water, then the activated carbon filter adsorbs residual chlorine, discoloration, odor, and some organic matter in the water, and finally the water softener removes hardness ions that cause scaling in the water.

[0012] This utility model further explains that the soft water tank is used for temporary water storage and to stabilize the flow rate; the precision filter has a built-in PP cotton filter element that can remove large particulate impurities such as silt, rust, and suspended solids, and an ultrafiltration (UF) membrane that can completely remove colloids, bacteria, and viruses.

[0013] This invention further explains that the high-pressure pump provides the required operating pressure for the nanofiltration membrane module; the product water outlet of the nanofiltration membrane module is connected to a water tank, and the wastewater outlet of the nanofiltration membrane module is connected to a sewage tank.

[0014] The present invention further illustrates that the flow sensor, pressure sensor, water temperature sensor and TDS sensor are sequentially fixed on the inlet pipe connected to the raw water booster pump of the pretreatment system; the TDS sensor and flow sensor are sequentially fixed on the product water outlet pipe of the nanofiltration membrane module; and pressure sensors are respectively fixed on the pipe connected to the inlet end of the nanofiltration membrane module and the pipe connected to the wastewater outlet end.

[0015] Compared with the prior art, the beneficial effects achieved by this utility model are: This utility model,

[0016] (1) By setting up a multi-stage pretreatment system, it can prevent physical clogging and chemical pollution of nanofiltration membrane, protect nanofiltration membrane from oxidation and avoid scaling. Finally, the impurities are further filtered by a precision filter, which greatly reduces the burden on nanofiltration membrane and extends the service life of nanofiltration membrane.

[0017] (2) By setting up intelligent sensing components and intelligent electric valves and controlling them through a PLC system, the key parameters of raw water and purified water can be monitored in real time, and the water intake, water production, sewage discharge and flushing processes can be automatically controlled to realize the automated operation of the equipment and reduce manual operation. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a top view schematic diagram of the present invention;

[0021] Figure 3 This is a front view schematic diagram of this utility model;

[0022] Figure 4 This is a flowchart illustrating the present invention.

[0023] In the diagram: 1. Support frame; 2. Raw water booster pump; 3. Pretreatment system; 301. Quartz sand filter; 302. Activated carbon filter; 303. Water softener; 304. Soft water tank; 305. Precision filter; 4. High-pressure pump; 5. Nanofiltration membrane module; 501. Nanofiltration membrane; 6. Intelligent sensing module; 601. TDS sensor; 602. Flow sensor; 603. Pressure sensor; 604. Water temperature sensor; 7. Intelligent electric valve. Detailed Implementation

[0024] The following detailed, non-limiting description of the present invention, in conjunction with preferred embodiments and accompanying drawings, is provided. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0025] Please see Figure 1-4 This utility model provides a technical solution: a nanofiltration filter, including a support frame 1.

[0026] like Figure 1-4As shown, a raw water booster pump 2 is fixedly installed on one side of the support frame 1. The inlet of the raw water booster pump 2 is connected to a raw water pipe, and the outlet is connected to a pretreatment system 3 via a pipeline. The pretreatment system 3 includes a quartz sand filter 301, which is connected to the outlet of the raw water booster pump 2. The quartz sand filter 301 is connected in sequence to an activated carbon filter 302 and a water softener 303 via pipelines. The bottoms of the quartz sand filter 301, the activated carbon filter 302, and the water softener 303 are aligned with each other and fixed on the support frame 1 in front of the raw water booster pump 2. The quartz sand filter 301 first removes suspended particles and colloidal substances from the raw water, then the activated carbon filter 302 adsorbs residual chlorine, discoloration, odor, and some organic matter in the water, and finally the water softener 303 removes hardness ions that cause scaling in the water.

[0027] A soft water tank 304 is fixed to the side of the support frame 1 away from the water softener 303. The outlet of the water softener 303 is connected to the inlet of the soft water tank 304 via a pipe. The soft water tank 304 is used for temporary water storage and to stabilize the flow rate. A precision filter 305 is fixed to the support frame 1 on the side of the soft water tank 304 away from the raw water booster pump 2. The outlet of the soft water tank 304 is connected to the inlet of the precision filter 305 via a pipe. The soft water tank 304 and the precision filter 305 are fixed parallel to each other on the support frame 1, with the precision filter 305 located directly behind the water softener 303. The precision filter 305 contains a PP cotton filter element that can remove large particulate impurities such as silt, rust, and suspended solids, and an ultrafiltration (UF) membrane that thoroughly removes colloids, bacteria, and viruses. After the pretreatment by the pretreatment system 3, the burden on subsequent water treatment is greatly reduced.

[0028] A high-pressure pump 4 is fixed to the side of the support frame 1 away from the raw water booster pump 2. The inlet of the high-pressure pump 4 is connected to the outlet of the precision filter 305 via a pipeline, and the outlet of the high-pressure pump 4 is connected to the inlet of the nanofiltration membrane module 5 via a pipeline. The high-pressure pump 4 provides the required operating pressure to the nanofiltration membrane module 5. The nanofiltration membrane module 5 is fixed to the rear of the support frame 1 away from the pretreatment system 3. The nanofiltration membrane module 5 includes a nanofiltration membrane 501, which is a spiral wound membrane element to expand the filtration area. The nanofiltration membrane 501 is made of high-performance polyamide composite membrane, which has high water flux, high desalination rate, and low operating pressure characteristics, retains beneficial minerals in the water, and makes the produced water taste better. The product water outlet of the nanofiltration membrane module 5 is connected to a water tank, and the wastewater outlet of the nanofiltration membrane module 5 is connected to a sewage tank.

[0029] Intelligent sensing components 6 are fixed to the connecting pipes of each component to monitor each stage in real time. The intelligent sensing components 6 include a TDS sensor 601, a flow sensor 602, a pressure sensor 603, and a water temperature sensor 604. The flow sensor 602, pressure sensor 603, water temperature sensor 604, and TDS sensor 601 are fixed in sequence on the inlet pipe of the pretreatment system 3 connected to the raw water booster pump 2; the TDS sensor 601 and flow sensor 602 are fixed in sequence on the product water outlet pipe of the nanofiltration membrane module 5; and pressure sensors 603 are fixed on the pipes connected to the inlet end and the wastewater outlet end of the nanofiltration membrane module 5, respectively.

[0030] The TDS sensor 601 probe is vertically inserted into the pipeline to ensure full contact with the water flow. The TDS sensor 601 monitors the total dissolved solids (TDS) value of the raw water and purified water in real time. The flow sensor 602 is connected in series in the pipeline to ensure that the water flows through the full pipe. The flow sensor 602 is used to monitor the instantaneous flow rate and cumulative water production. The pressure sensor 603 monitors the inlet water pressure, the pressure before the membrane, and the wastewater pressure. The water temperature sensor 604 is used to monitor the inlet water temperature, as water temperature affects water production efficiency.

[0031] Intelligent electric valves 7 are fixedly installed on the pipeline connecting the inlet of the raw water booster pump 2 to the raw water pipeline, as well as on the pipeline at the product water outlet and wastewater outlet of the nanofiltration membrane module 5, to control the inlet, product water, sewage discharge and flushing processes.

[0032] It should be noted that both the intelligent sensing component 6 and the intelligent electric valve 7 are analyzed, processed, and controlled by a PLC system.

[0033] Working principle: During use, the PLC controls the opening of the intelligent electric valve 7 on the raw water pipeline, and simultaneously starts the raw water booster pump 2. The raw water booster pump 2 pressurizes the raw water in the pipeline, ensuring that the raw water has sufficient power to flow through the subsequent pretreatment system 3.

[0034] The pressurized raw water first enters the quartz sand filter 301 to remove suspended particles and colloidal substances, significantly reducing the SDI value of the water and thus preventing physical clogging and chemical fouling of the nanofiltration membrane 501. After quartz sand filtration, the raw water flows into the activated carbon filter 302 to remove residual chlorine, discoloration, odor, and some organic matter, protecting the subsequent nanofiltration membrane 501 from oxidation. The raw water then passes through the water softener 303, where hardness ions that cause scaling are removed through ion exchange. The softened water flows into the soft water tank 304 for temporary storage to prevent instability in subsequent stages. The water in the soft water tank then enters the precision filter 305 through pipelines for more refined pretreatment, greatly reducing the burden on the nanofiltration membrane 501.

[0035] The PLC starts the high-pressure pump 4, which pressurizes the water treated by the precision filter 305 to the operating pressure required by the nanofiltration membrane module 5, providing power for the water's membrane permeation. The pressurized water enters the nanofiltration membrane module 5 and flows through the spiral wound nanofiltration membrane 501, which retains harmful substances while retaining beneficial substances. The purified water filtered by the nanofiltration membrane 501 flows from the product water outlet of the nanofiltration membrane module 5 into the water tank for subsequent use. The retained harmful substances and a small amount of unpermeated water form wastewater, which flows from the wastewater outlet into the sewage tank for centralized treatment or recycling.

[0036] Throughout the entire operation, the intelligent sensing component 6 continuously collects key data and transmits it to the PLC for analysis, ensuring stable equipment operation and qualified water production.

[0037] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model, 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, and therefore should not be construed as a limitation of this utility model.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A nanofiltration filter, comprising a support frame (1), characterized in that: A raw water booster pump (2) is fixedly installed on one side of the support frame (1). The inlet of the raw water booster pump (2) is connected to the raw water pipeline, and the outlet is connected to the pretreatment system (3) through a pipeline. A high-pressure pump (4) is fixed on the side of the support frame (1) away from the raw water booster pump (2). The inlet of the high-pressure pump (4) is connected to the outlet of the pretreatment system (3) through a pipeline, and the outlet of the high-pressure pump (4) is connected to the inlet of the nanofiltration membrane module (5) through a pipeline. A smart sensor component (6) is fixedly installed on the pipeline connecting each component. A smart electric valve (7) is fixedly installed on the pipeline connecting the inlet of the raw water booster pump (2) to the raw water pipeline, as well as on the pipeline at the product water outlet and wastewater outlet of the nanofiltration membrane module (5). The smart sensor component (6) and the smart electric valve (7) are both analyzed, processed, and controlled by a PLC system.

2. A nanofiltration filter according to claim 1, characterized in that: The pretreatment system (3) includes a quartz sand filter (301), which is connected to the outlet of the raw water booster pump (2). The quartz sand filter (301) is connected to an activated carbon filter (302) and a water softener (303) in sequence through pipelines. The bottoms of the quartz sand filter (301), the activated carbon filter (302) and the water softener (303) are aligned with each other and fixed on the support frame (1) in front of the raw water booster pump (2).

3. A nanofiltration filter according to claim 2, characterized in that: A soft water tank (304) is fixed on the side of the support frame (1) away from the water softener (303). The outlet of the water softener (303) is connected to the inlet of the soft water tank (304) through a pipe. A precision filter (305) is fixed on the support frame (1) on the side of the soft water tank (304) away from the raw water booster pump (2). The outlet of the soft water tank (304) is connected to the inlet of the precision filter (305) through a pipe. The soft water tank (304) and the precision filter (305) are fixed parallel to each other on the support frame (1) and the precision filter (305) is located directly behind the water softener (303).

4. A nanofiltration filter according to claim 1, characterized in that: The nanofiltration membrane assembly (5) is fixed behind the support frame (1) on the side away from the pretreatment system (3). The nanofiltration membrane assembly (5) includes a nanofiltration membrane (501). The nanofiltration membrane (501) is a spiral wound membrane element. The nanofiltration membrane (501) is made of a high-performance polyamide composite membrane.

5. A nanofiltration filter according to claim 1, characterized in that: The intelligent sensing component (6) includes a TDS sensor (601), a flow sensor (602), a pressure sensor (603), and a water temperature sensor (604); the flow sensor (602), pressure sensor (603), water temperature sensor (604), and TDS sensor (601) are sequentially fixed on the inlet pipe of the pretreatment system (3) connected to the raw water booster pump (2); the TDS sensor (601) and flow sensor (602) are sequentially fixed on the product water outlet pipe of the nanofiltration membrane module (5); pressure sensors (603) are respectively fixed on the pipe connected to the inlet end of the nanofiltration membrane module (5) and the pipe connected to the wastewater outlet end.

6. A nanofiltration filter according to claim 3, characterized in that: The precision filter (305) has a built-in PP cotton filter element and an ultrafiltration (UF) membrane.

7. A nanofiltration filter according to claim 4, characterized in that: The product water outlet of the nanofiltration membrane module (5) is connected to a water tank, and the wastewater outlet of the nanofiltration membrane module (5) is connected to a sewage discharge tank.

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