CN219259783U - Circulation water purification system - Google Patents

Abstract

The application provides a circulation water purification system, including first water collecting device, first booster pump, primary filter equipment, the second booster pump, receive filter membrane filter equipment, second water collecting device and delivery pipe, first water collecting device has the water inlet with the water source intercommunication, and the delivery port with first booster pump intercommunication, the water in the first water collecting device circulates first booster pump in proper order, primary filter equipment, the second booster pump, receive filter membrane filter equipment and second water collecting device, the first end and the second water collecting device intercommunication of delivery pipe, the second end intercommunication of delivery pipe is to first water collecting device, so that the water reflux that remains in the delivery pipe is to first water collecting device, still be equipped with the intake that supplies the user to get water on the delivery pipe. The second end of the water supply pipe returns the filter water which is not used up by the user to the first water collecting device again. The circulating water purification system can not store water, can avoid water quality deterioration, ensures that users can always take clean and fresh water, and is favorable for ensuring long-term standard of water quality.

Description

Circulation water purification system

Technical Field

The application belongs to filtration equipment technical field, and more specifically relates to a circulation water purification system.

Background

Along with the development of society and the improvement of living standard, the requirements of people on drinking water are gradually increased, and the requirements on water purifying equipment are also gradually increased.

At present, most water purifying equipment adopts a still water storage mode. Even the water after filtration and purification can grow a lot of bacteria and impurities after long-time storage and standing; in addition, the existing water purifying equipment has limited water purifying efficiency and insufficient working reliability, and cannot provide fresh and high-quality purified water for a long time.

Disclosure of Invention

An object of the embodiment of the application is to provide a circulation water purification system to solve the water purification equipment purification effect that exists among the prior art not good, unable technical problem who continuously provides fresh purified water.

In order to achieve the above purpose, the technical scheme adopted in the application is as follows:

the utility model provides a circulation water purification system, including first water collecting device, first booster pump, elementary filter equipment, second booster pump, nanofiltration membrane filter equipment, second water collecting device and delivery pipe, first water collecting device have with the water inlet of water source intercommunication, and with the delivery port of first booster pump intercommunication, the interior water of first water collecting device circulate in proper order first booster pump second booster pump nanofiltration membrane filter equipment and second water collecting device, the first end of delivery pipe with second water collecting device communicates, the second end of delivery pipe communicates to first water collecting device, so that the water that remains in the delivery pipe flows back to first water collecting device, still be equipped with the intake that supplies the user to get water on the delivery pipe.

As a further improvement of the above technical scheme:

optionally, the primary filter device comprises a sand filter device, an activated carbon filter device and a soft water device which are sequentially communicated, the first booster pump is communicated with the sand filter device, and the second booster pump is communicated with the soft water device.

Optionally, at least one of the sand filter device and the activated carbon filter device is provided with a reversing valve for reversing the water flow in the sand filter device and/or the activated carbon filter device.

Optionally, the number of the first booster pumps is at least two, and each first booster pump is arranged in parallel with each other.

Optionally, the water temperature adjusting device is located at the first end of the water supply pipe, and the water temperature adjusting device is used for adjusting the temperature of water in the water supply pipe to a preset temperature.

Optionally, the water treatment device further comprises a magnetic field generating device, wherein the magnetic field generating device is positioned between the nanofiltration membrane filtering device and the second water collecting device and is used for generating a magnetic field capable of magnetizing water molecules.

Optionally, the filter further comprises a protection filter device, wherein the protection filter device is arranged at the water inlet end of the nanofiltration membrane filter device.

The application also provides a circulating water purifying method of the circulating water purifying system, which comprises the following steps:

collecting raw water, namely collecting the raw water in the first water collecting device;

primary pressurizing, namely pressurizing the raw water to a first preset pressure through the first booster pump;

primary filtering, namely sequentially performing sand filtering, active carbon filtering and softening treatment on the raw water reaching a first preset pressure;

a second supercharging pump for supercharging the primary filtered water to a second preset pressure;

nanofiltration, wherein the water reaching the second preset pressure is filtered by a nanofiltration membrane filter device;

magnetizing water after nano filtration by the water magnetizing device;

collecting purified water, and collecting magnetized water in the second water collecting device;

pressurizing the water supply, namely pressurizing the purified water in the second water collecting device to a third preset pressure through the third booster pump, and supplying water to the water supply pipe;

and the residual water flows back, and the residual water in the water supply pipe continuously flows back to the first water collecting device for circulating purification.

As a further improvement of the above technical scheme:

optionally, after the water temperature is adjusted to a predetermined temperature by the water temperature adjusting device, water is supplied to the water supply pipe.

Optionally, when the sand filtration and activated carbon filtration process is operated for a predetermined time, the reversing valve is used for switching the water flows in the sand filtration device and the activated carbon filtration device to flow reversely so as to flush the sand filtration device and the activated carbon filtration device.

The beneficial effect that this application provided a circulation water purification system lies in:

the utility model provides a pair of circulation water purification system, including first water collecting device, first booster pump, primary filter equipment, the second booster pump, receive filter membrane filter equipment, second water collecting device and delivery pipe, first water collecting device has the water inlet with the water source intercommunication, and the delivery port with first booster pump intercommunication, the water in the first water collecting device circulates first booster pump in proper order, primary filter equipment, the second booster pump, receive filter membrane filter equipment and second water collecting device, the first end and the second water collecting device intercommunication of delivery pipe, the second end intercommunication of delivery pipe is to first water collecting device, so that the water reflux that remains in the delivery pipe is to first water collecting device, still be equipped with the intake that supplies the user to get water on the delivery pipe.

Wherein the first water collecting device and the second water collecting device may be water tanks. The first water collecting device is a raw water tank for containing raw water, and the second water collecting device is a water purifying tank for containing filtered purified water. The raw water tank and the clean water tank are both made of stainless steel materials. The raw water tank and the purified water tank are temporarily stored with water with preset volume, and the raw water tank and the purified water tank play a role in adjusting the water supply amount of the circulating water purification system. The first booster pump boosts raw water in the first water collecting device so that the raw water can be filtered through the primary filtering device. Because the water pressure is lost when penetrating the primary filter device, the second booster pump is required to boost the pressure of the primarily filtered water again so that the water can be filtered through the nanofiltration membrane filter device. The filtered purified water passing through the nanofiltration membrane filtration device is collected in the second water collecting device and is supplied to a user through the water intake on the water supply pipe. The unused residual water in the water supply pipe flows back to the first water collecting device, is mixed with the raw water, and is circularly filtered. The circulating water purification system filters raw water through the primary filtering device 3 and the nanofiltration membrane filtering device 5, so as to generate filtered water meeting the standard. And the second end of the water supply pipe 7 can also re-flow the filter water which is not used up by the user into the first water collecting device 1, mix with the raw water and participate in the purification treatment again. The circulating water purification system can not store water, can avoid water quality deterioration, ensures that users can always take clean and fresh water, and is favorable for ensuring long-term standard of water quality.

The circulating water purifying method comprises the steps of collecting raw water, primary pressurization, primary filtration, secondary pressurization, nano filtration, magnetization treatment, collecting purified water, water supply pressurization, residual water backflow and the like. The circulating water purifying method has the advantages that the circulating water purifying system is used, so that the circulating water purifying method has the advantages of being capable of keeping the purified water fresh for a long time and avoiding the generation of siltation and peculiar smell of the purified water.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following description will briefly introduce the drawings that are needed in the embodiments or the description of the prior art, it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a circulation water purification system provided in the present application;

FIG. 2 is a schematic view of a first partial enlarged structure of FIG. 1;

fig. 3 is a schematic view of a second partial enlarged structure of fig. 1.

Wherein, each reference sign in the figure:

1. a first water collecting device; 11. A water inlet;

12. a water outlet; 2. A first booster pump;

3. a primary filtration device; 31. Sand filtering device;

32. an activated carbon filter device; 33. A water softening device;

34. soft water salt box; 4. A second booster pump;

5. nanofiltration membrane filtration device; 6. A second water collecting device;

7. a water supply pipe; 71. A water intake;

8. a water temperature adjusting device; 9. A magnetic field generating device;

10. protecting the filter device.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved by the present application more clear, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present application and simplify description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

As shown in fig. 1 to 3, the application provides a circulation water purification system, including first water collecting device 1, first booster pump 2, primary filter device 3, second booster pump 4, nanofiltration membrane filter device 5, second water collecting device 6 and delivery pipe 7, first water collecting device 1 has the water inlet 11 with the water source intercommunication, and the delivery port 12 with first booster pump 2 intercommunication, the water in the first water collecting device 1 circulates first booster pump 2 in proper order, primary filter device 3, second booster pump 4, nanofiltration membrane filter device 5 and second water collecting device 6, the first end and the second water collecting device 6 intercommunication of delivery pipe 7, the second end intercommunication of delivery pipe 7 is to first water collecting device 1, so that the water that remains in the delivery pipe 7 flows back to first water collecting device 1, still be equipped with the intake 71 of water supply user's water intaking on the delivery pipe 7.

Wherein the first water collecting device 1 and the second water collecting device 6 may be water tanks. The first water collecting device 1 is a raw water tank for containing raw water, and the second water collecting device 6 is a clean water tank for containing filtered clean water. The raw water tank and the clean water tank are both made of 316 stainless steel materials. The raw water tank and the purified water tank are temporarily stored with water with preset volume, and the raw water tank and the purified water tank play a role in adjusting the water supply amount of the circulating water purification system. Raw water specifically refers to water directly from a water source and not treated by the circulating water purification system.

The original water tank is also internally provided with a liquid level sensor, and a normally closed electromagnetic valve is arranged at the water inlet 11 of the original water tank. When the liquid level sensor senses that the liquid level (water storage volume) in the original water tank is lower than the preset level (preset volume), the normally closed electromagnetic valve is switched to be in an open state, water of a water source is fed into the original water tank, and when the liquid level in the original water tank is higher than the preset level, the electromagnetic valve is switched to be in a closed state. When the liquid level in the original water tank is lower than the preset height for a long time, the circulating water purification system can also provide an alarm prompt.

In order to facilitate the observation of the water levels in the first water collecting device 1 and the second water collecting device 6, a set of transparent visible liquid level pipes are respectively arranged outside the first water collecting device 1 and the second water collecting device 6. The liquid level pipe is communicated with the first water collecting device 1 or the second water collecting device 6, so that a communicating vessel is formed, and the liquid level in the liquid level pipe is equal to the liquid level in the water tank.

The nanofiltration membrane filter device 5 is a water purifying device which adopts a nanofiltration membrane as a filter medium and uses the pressure difference as a driving force to push water to be filtered to permeate the nanofiltration membrane so as to realize filtration. Nanofiltration membranes are mostly made of acetate fibers or polymer materials with similar properties. The nanofiltration is a screening process by utilizing a membrane separation technology, the pressure difference at two sides of the membrane is used as a driving force, the nanofiltration membrane is used as a filtering medium, under a certain pressure, when the stock solution flows through the surface of the membrane, a plurality of tiny micropores densely distributed on the surface of the nanofiltration membrane only allow water and small molecular substances to pass through to become permeate, and substances with the volume larger than the micro pore diameter of the surface of the membrane in the stock solution are trapped at the liquid inlet side of the membrane to become concentrated solution, so that the purposes of purifying, separating and concentrating the stock solution are realized.

The first booster pump 2 boosts the raw water in the first water collecting device 1 so that the raw water can be filtered through the primary filter device 3. Since the water pressure is lost when penetrating the primary filter 3, the second booster pump 4 is required to boost the pressure of the primarily filtered water again so that the water can be filtered through the nanofiltration membrane filter device 5. The filtered purified water passing through the nanofiltration membrane filtration device 5 is collected in the second water collecting device 6 and supplied to the user through the water intake 71 on the water supply pipe 7. The unused surplus water in the water supply pipe 7 flows back to the first water collecting device 1, is mixed with raw water, and is circulated and filtered. The circulating water purification system filters raw water through the primary filtering device 3 and the nanofiltration membrane filtering device 5, so as to generate filtered water meeting the standard. And the second end of the water supply pipe 7 can also re-flow the filter water which is not used up by the user into the first water collecting device 1, mix with the raw water and participate in the purification treatment again. The circulating water purification system can not store water, can avoid water quality deterioration, ensures that users can always take clean and fresh water, and is favorable for ensuring long-term standard of water quality.

As shown in fig. 1 and 2, in one embodiment of the present application, the primary filter device 3 includes a sand filter device 31, an activated carbon filter device 32, and a water softener 33 that are sequentially communicated, the first booster pump 2 is communicated with the sand filter device 31, and the second booster pump 4 is communicated with the water softener 33.

Wherein, the tank body of the sand filtering device 31 adopts an FRP winding tank body with a lining made of PE with high content. The filter element of the sand filter device 31 is a filter element containing natural quartz sand, manganese sand, anthracite and other multi-medium filter materials. The particle size of the filter medium particles is generally 0.5-1.2mm, and the non-uniformity coefficient is 2. The filtering speed range is 10-17m/h, and the sand filtering device 31 can effectively remove suspended impurities, fe3+, mn2+, SO42+, turbidity, residual chlorine, suspended matters, colloid matters and the like in water, SO that the water is clearer and more transparent, and the turbidity and SDI value of the discharged water are reduced; the work load of the nanofiltration membrane is reduced, and the service life of the nanofiltration membrane is prolonged. The first booster pump 2 pressurizes the water in the first water collecting device 1 and then introduces the pressurized water into the sand filter device 31.

The tank body of the activated carbon filter device 32 is an FRP wound tank body lined with high-content PE material. The filter element of the activated carbon filter device 32 adopts coconut shell and fruit shell activated carbon. The activated carbon filter device 32 is capable of removing chromaticity formed by iron, manganese, plant decomposition products, organic pollutants, and the like; can remove trace pollutants in water such as pesticides, chlorinated hydrocarbons, aromatic compounds, BOD and COD; residual chlorine or oxidant can be removed, and the nanofiltration membrane is protected; can be used for deodorizing, removing trace heavy metal ions (such as mercury, chromium, and the like) in water, synthesizing a detergent, reflecting substances, and the like; can also inhibit bacterial and fungal growth and prolong the service life of the activated carbon.

The tank body of the water softening device 33 is an FRP wound tank body lined with PE material with high content. The tank of the water softener 33 is filled with a sodium ion softening resin. The water softener 33 is an ion exchange water softener, and removes calcium and magnesium ions in water by using sodium cation exchange resin, so as to reduce the hardness of raw water and achieve the purpose of softening hard water. The water softener 33 is also used in combination with a soft water salt tank 34. A predetermined weight of soft water salt is added to the soft water salt tank 34 every predetermined period. Soft water salts are typically sodium chloride, and when the sodium ion softening resin fails, the sodium ion softening resin can be regenerated by adding sodium chloride, thereby extending the useful life of the sodium ion softening resin. The softened water is pressurized by a second booster pump 4 and is introduced into a nanofiltration membrane filtration device 5.

In one embodiment of the present application, at least one of the sand filter device 31 and the activated carbon filter device 32 is provided with a reversing valve for reversing the flow of water within the sand filter device 31 and/or the activated carbon filter device 32.

Wherein the reversing valve is controlled to work by the control device. When the reversing valve realizes the forward flow of water flow, the sand filter device 31 and the activated carbon filter device 32 can realize the filtering function. When the reversing valve realizes the reverse flow of water flow, the water flow can flush the filter materials in the sand filter device 31 and the activated carbon filter device 32, and the flushed sewage is discharged through the sewage discharge outlet on the sand filter device 31 and the activated carbon filter device 32, so that the filtering performance of the sand filter device 31 and the activated carbon filter device 32 is ensured, and the service life of the water flow is prolonged.

The sand filter 31 is typically backwashed once every 6-7 days of operation to remove the filtered debris. The timed backwash is automatically performed by a reversing valve mounted on the sand filter device 31. The reversing valve is generally of a time control type and a flow control type, and can be triggered to work by taking time or flow as a trigger factor.

The activated carbon filter device 32 also adopts the working mode of an automatic reversing valve to realize the functions of filtering, backwashing and other equipment.

As shown in fig. 1 and 2, in one embodiment of the present application, the number of first booster pumps 2 is at least two, and each first booster pump 2 is disposed in parallel with each other.

The number of the first booster pumps 2 is at least two, so that a standby working mode is realized (when one first booster pump 2 works, the other first booster pump 2 is in a standby state, and when one first booster pump 2 fails or overhauls, the other first booster pump 2 can be started to work, so that the continuous work of the circulating water purifying system is ensured). The overflow surface of the first booster pump 2 is made of 316 stainless steel, the working flow of the first booster pump 2 is about 2 times of the water yield, and the outlet pressure reaches 0.3Mpa to 0.35Mpa. And the requirement adjustment can be set according to the operation parameters of the circulating water purification system. The noise of the first booster pump 2 meets the environmental protection requirement, the standard point noise is less than or equal to 65dB, and the motor adopts an efficient energy-saving motor energy efficiency grade which is IE2 grade.

As shown in fig. 1 and 3, in one embodiment of the present application, the number of second booster pumps 4 is at least two. The second booster pump 4 also adopts a standby working mode to boost the pressure of water for the nanofiltration membrane filtration device 5.

As shown in fig. 1 and 2, in one embodiment of the present application, the first end of the water supply pipe 7 is further provided with a water supply booster pump. The number of the water supply booster pumps is at least two, and a one-to-one working mode is also adopted. The water supply booster pump is used for providing water supply pressure, and the water pump parameter meets the use requirement, ensures that the water outlet flow and pressure at the tail end of water taking meet the use requirement. The circulating water purifying system also has the function of detecting the instantaneous water supply pressure so as to ensure the stable operation of the system, safety and reliability.

As shown in fig. 1 and 2, in one embodiment of the present application, the water temperature adjusting device 8 is further included, the water temperature adjusting device 8 is located at the first end of the water supply pipe 7, and the water temperature adjusting device 8 is used for adjusting the temperature of water in the water supply pipe 7 to a predetermined temperature.

Wherein the water temperature adjusting means 8 comprises heating means and cooling means. The water temperature adjusting device 8 can adjust the temperature of the water in the water supply pipe 7, ensure that the water supplied to the user is kept at a preset temperature, provide cool and cool cold water in hot summer and warm hot water in cold winter, and improve the use experience of the user. The water temperature adjusting device 8 also has the function of protecting the water supply pipe 7 when the water supply pipe 7 is heated to a predetermined temperature, and prevents the water supply pipe 7 from being frozen and cracked due to excessively low external temperature.

In one embodiment of the present application, the water treatment device further comprises a magnetic field generating device 9, wherein the magnetic field generating device 9 is located between the nanofiltration membrane filtration device 5 and the second water collection device 6, and the magnetic field generating device 9 is used for generating a magnetic field capable of magnetizing water molecules.

The magnetic field generator 9 can generate 3000 GS-5000 GS (GS, high for short, unit of magnetic induction intensity). When ordinary water passes through the magnetic field at a predetermined flow rate and cuts the magnetic induction lines in a direction perpendicular to the magnetic induction lines, the physical structure of the water can be changed without changing the original chemical composition of the water, thereby generating magnetized small molecular cluster water. After being filtered by the nanofiltration membrane filtration device 5, the water passes through the magnetic field generation device 9 at a preset flow rate, and small molecular cluster water is generated under the action of the magnetic field generation device 9 and flows into the second water collection device 6.

Research shows that water in nature does not exist in the form of single water molecules, but a plurality of water molecules are polymerized together through hydrogen bonding to form water molecules, commonly called water clusters (clusters), also called water clusters and water clusters. The hydrogen bond in the water molecule is a dynamic bond, is easy to split and form, and the infrared spectrum test also verifies the theoretical predicted binary water structure. The size of the water molecule group (cluster) can be changed under different external factors. The structure of common water is usually macromolecular cluster water formed by associating 100-200 water molecules, and under certain conditions (temperature and magnetic field), the molecular cluster structure of some liquid water is smaller, the smaller the molecular cluster is, the greater the activity is, and the liquid water is more easily absorbed by cells. Thus small molecule cluster water is also referred to as activated water.

In one embodiment of the present application, the filter device 10 is further included, and the protective filter device 10 is disposed at the water inlet end of the nanofiltration membrane filtration device 5.

The protection filter device 10 is also called a cartridge filter (also called a precision filter). The protective filter 10 consists of a cartridge housing and a tubular filter element. The shell of the cylinder is generally made of stainless steel, the tubular filter element adopts a PP melt-blown filter element as a filter element, the filter precision is within 5 mu m, and fine particles in the pretreatment are filtered out, so that the normal operation of the nanofiltration membrane is ensured.

The circulating water purification system of the application further comprises elements such as a communication pipeline, an on-off valve, a one-way valve, a flowmeter, a pressure gauge and the like. Since the above elements are applied to the existing elements in the circulation water purification system of the present application, detailed description thereof will not be made.

The application also provides a circulating water purifying method of the circulating water purifying system based on the embodiment, which comprises the following steps:

collecting raw water, namely collecting the raw water in the first water collecting device 1;

the first stage of pressurizing, namely pressurizing raw water to a first preset pressure through a first booster pump 2;

primary filtering, namely sequentially performing sand filtering, active carbon filtering and softening treatment on raw water reaching a first preset pressure;

the secondary pressurization is carried out, and the primary filtered water is pressurized to a second preset pressure through a second booster pump 4;

nanofiltration, wherein water reaching a second preset pressure is filtered by a nanofiltration membrane filtration device 5;

magnetizing the nano-filtered water by a water magnetizing device;

collecting purified water, and collecting magnetized water in a second water collecting device 6;

pressurizing the water supply, pressurizing the purified water in the second water collecting device 6 to a third preset pressure through a third booster pump, and supplying water to the water supply pipe 7;

the residual water flows back, and the residual water in the water supply pipe 7 continuously flows back to the first water collecting device 1 for circulating purification.

The method for circulating water purification of the present application focuses on the continuous backflow of the purified water remaining in the water supply pipe 7 to the first water collecting device 1 for circulating purification, except for the steps of pressurizing and filtering raw water. The conventional water purifying method generally stores purified water in a water purifying tank for a user to take at any time, but even if the purified water is stored for a long time, the water quality still deteriorates, and the use experience of the user is reduced. According to the circulating water purifying method, water in the circulating water purifying system is kept flowing continuously, the problem of water storage is avoided, even if water is not used up by a user in the water supply pipe 7, the water can flow back to the first water collecting device 1 again through the second end of the water supply pipe 7 and is mixed with raw water, the water is purified again, the circulating water purifying system is guaranteed not to store water, water quality deterioration can be avoided, the user can be guaranteed to take clean and fresh water all the time, and long-term standard of water quality is guaranteed.

In one embodiment of the present application, water is supplied into the water supply pipe 7 after the water temperature is adjusted to a predetermined temperature by the water temperature adjusting means 8.

Wherein the predetermined temperature is in the range of specifically 10 ℃ to 25 ℃. The water temperature adjusting means 8 adjusts the temperature of the water in the water supply pipe 7 to ensure that the water supplied to the user is maintained at a predetermined temperature, cool cold water is provided in hot summer, warm hot water is provided in cold winter, and the user experience is improved. The water temperature adjusting device 8 also has the function of protecting the water supply pipe 7 when the water supply pipe 7 is heated to a predetermined temperature, and prevents the water supply pipe 7 from being frozen and cracked due to excessively low external temperature.

In one embodiment of the present application, when the sand filtration and activated carbon filtration process is run for a predetermined period of time, the water flow in the sand filtration device 31 and the activated carbon filtration device 32 is reversed by switching the reversing valve to flush the inside of the sand filtration device 31 and the activated carbon filtration device 32.

The sand filter 31 is typically backwashed once every 6-7 days of operation to remove the filtered debris. The activated carbon filter unit 32 is typically back-flushed once every 3-4 days of operation to remove impurities adhering to the activated carbon surface. The sewage after flushing is discharged through the sewage discharge outlets on the sand filter device 31 and the activated carbon filter device 32, so that the filtering performance of the sand filter device 31 and the activated carbon filter device 32 is ensured, and the service life of the sewage is prolonged.

The foregoing description of the preferred embodiments of the present application is not intended to be limiting, but is intended to cover any and all modifications, equivalents, and alternatives falling within the spirit and principles of the present application.

Claims (7)

1. The utility model provides a circulation water purification system, its characterized in that includes first water collecting device (1), first booster pump (2), elementary filter equipment (3), second booster pump (4), nanofiltration membrane filter equipment (5), second water collecting device (6) and delivery pipe (7), first water collecting device (1) have with water inlet (11) of water source intercommunication, and with delivery port (12) of first booster pump (2) intercommunication, water in first water collecting device (1) circulate in proper order first booster pump (2 primary filter equipment (3) second booster pump (4) nanofiltration membrane filter equipment (5) with second water collecting device (6), the first end of delivery pipe (7) with second water collecting device (6) intercommunication, the second end of delivery pipe (7) communicate to first water collecting device (1), so that remaining water in delivery pipe (7) flows back to first water collecting device (1), still be equipped with the intake of water supply mouth of a river on delivery pipe (7).

2. The circulation water purification system according to claim 1, wherein the primary filter device (3) comprises a sand filter device (31), an activated carbon filter device (32) and a water softener (33) which are sequentially communicated, the first booster pump (2) is communicated with the sand filter device (31), and the second booster pump (4) is communicated with the water softener (33).

3. The circulation water purification system according to claim 2, characterized in that at least one of the sand filter device (31) and the activated carbon filter device (32) is provided with a reversing valve for reversing the water flow in the sand filter device (31) and/or the activated carbon filter device (32).

4. A circulation water purification system as claimed in claim 3, wherein the number of first booster pumps (2) is at least two, each of the first booster pumps (2) being arranged in parallel with each other.

5. The circulation water purification system according to claim 4, further comprising a water temperature adjusting device (8), the water temperature adjusting device (8) being located at a first end of the water supply pipe (7), the water temperature adjusting device (8) being adapted to adjust the temperature of the water within the water supply pipe (7) to a predetermined temperature.

6. The circulating water purification system of claim 5, further comprising a magnetic field generating device (9), the magnetic field generating device (9) being located between the nanofiltration membrane filtration device (5) and the second water collection device (6), the magnetic field generating device (9) being configured to generate a magnetic field capable of magnetizing water molecules.

7. The circulating water purification system of claim 6, further comprising a protective filter device (10), wherein the protective filter device (10) is disposed at the water inlet end of the nanofiltration membrane filter device (5).

Images