CN217092937U - Compound filter element group spare and water purification system - Google Patents

Abstract

The utility model provides a compound filter element group spare and water purification system, compound filter element group spare includes: raw water inlet, produce the water export, the waste water export, first filter core and second filter core, first filter core includes first hollow fiber filtration membrane silk, the second filter core includes second hollow fiber filtration membrane silk, the second filter core is located the radial inboard of first filter core, the hydroenergy that raw water import got into can filter through first filter core, and get into the inside of first hollow fiber filtration membrane silk and finally derive through producing the water export when filtering, the hydroenergy of the inside that does not get into first filter core can filter through the second filter core, and get into the inside of second hollow fiber filtration membrane silk and finally derive through producing the water export when filtering, the hydroenergy of the inside that does not get into the second filter core can communicate and derive with the waste water export. Through the utility model discloses filter fineness is high, compares in traditional ultrafiltration filter core technique, reduces the scale deposit risk, can also improve the recycle ratio of waste water.

Description

Compound filter element group spare and water purification system

Technical Field

The utility model belongs to the technical field of the water purification, concretely relates to compound filter element group spare and water purification system.

Background

With the continuous development of the water purification market, the current high-flux household water purifier in the market is higher and higher, the flux of a new household water purifier tends to be larger, and all large brands of 1000+ G household water purifiers are sold; the core filter element of the large-flow household water purifier is still a reverse osmosis filter element and a nanofiltration filter element. The nanofiltration filter core is more and more popular with consumers in the market due to the characteristics of low operation pressure, large pure water flux, low operation cost and the like.

At present, reverse osmosis membranes and nanofiltration membranes used in the field of water treatment mostly adopt a pressure filtration mode, and the modes comprise roll type nanofiltration, hollow fiber nanofiltration, plate-frame type nanofiltration and the like; in the actual use process, the realization form of the large-flux filter element is mostly that a plurality of nanofiltration/reverse osmosis membrane assemblies are connected in parallel for use, the system is complex, the size of the filter element is large, the whole system and the structure are complex, the size is large, and the large-flux filter element is not suitable for the use scene of the household water purifier. Patent CN212855309U reports a nanofiltration membrane subassembly with formula of turning back water channel, and it can make runner length increase one time, increases the product water flux of subassembly, but its water inlet, product water mouth and dense water discharge mouth are in the different faces, have the installation inconvenient, space utilization is not high scheduling problem.

Through the analysis, if a filter element assembly with high filtering precision and large water production flux can be developed, the requirement of purifying water quality of a user can be met, the problem of complex operation of replacing the filter element can be solved, and the filter element treatment efficiency is high compared with the filter element treatment efficiency on the market. Therefore, the method has certain advantages in both technology and application prospect.

Because traditional filter element group spare among the prior art can't satisfy simultaneously that filter fineness is high, the running cost is low, produce that water flux is big, install convenient technical problem such as convenient, consequently the utility model discloses study design a compound filter element group spare and water purification system.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming traditional filter element group spare among the prior art and can't satisfy simultaneously that the filter fineness is high, the running cost is low, produce the big, the convenient defect of installation of water flux to a compound filter element group spare and water purification system are provided.

The utility model provides a compound filter element group spare, it includes:

the water-saving filter comprises a raw water inlet, a water production outlet, a wastewater outlet, a first filter element and a second filter element, wherein the first filter element comprises a first hollow fiber filtering membrane wire, the second filter element comprises a second hollow fiber filtering membrane wire, the second filter element is positioned on the radial inner side of the first filter element, the water entering from the raw water inlet can be filtered by the first filter element, and enters the inside of the first hollow fiber filtering membrane wire during filtering and is finally led out through the water production outlet, the water not entering the inside of the first filter element can be filtered by the second filter element, enters the inside of the second hollow fiber filtering membrane wire during filtering and is finally led out through the water production outlet, and the water not entering the inside of the second filter element can be communicated with the wastewater outlet and is led out;

still include filter core shell and bottom end cover, produce the water export with the waste water export all sets up the axial first end of filter core shell, the bottom end cover with the axial second end of filter core shell meets, the raw water import for set up in through-hole on the bottom end cover to can be with raw water leading-in extremely the inside of filter core shell.

In some embodiments, still include filter core shell, first section filter core membrane shell and second section filter core membrane shell, first section filter core membrane shell with second section filter core membrane shell all set up in the filter core shell, second section filter core membrane shell set up in the radial inside of first section filter core membrane shell, just the inside of second section filter core membrane shell sets up the second filter core, first filter core is located the periphery of second section filter core membrane shell, first section filter core membrane shell is located axial one side of first filter core.

In some embodiments, the cartridge housing is a cylindrical configuration, the first hollow fiber filtration membrane filaments are in a U-shaped configuration with straight edges extending in an axial direction of the cartridge housing, and the second hollow fiber filtration membrane filaments are in a U-shaped configuration with straight edges extending in the axial direction of the cartridge housing; the first hollow fiber filtering membrane filaments are multiple and are arranged at intervals along the radial direction and the circumferential direction of the filter element shell; the second hollow fiber filtering membrane filaments are multiple and are arranged at intervals along the radial direction and the circumferential direction of the filter element shell.

In some embodiments, a first channel is formed between the first section of the filter element membrane shell and the filter element shell, a first cavity is formed between the second section of the filter element membrane shell and the filter element shell, the first filter element is located in the first cavity, the raw water inlet is communicated with one end of the first channel, and the other end of the first channel is communicated with the first cavity so as to enable water to be guided into the first filter element for filtering.

In some embodiments, the second section of the filter cartridge membrane shell is internally provided with a second cavity, the second filter cartridge is positioned in the second cavity, the second section of the filter cartridge membrane shell is provided with at least one first section of waste water outlet penetrating through the inner wall and the outer wall of the second section of the filter cartridge membrane shell, and water in the first cavity can enter the second cavity through the first section of waste water outlet.

In some embodiments, a second channel is further provided between the axial end of the first filter element and the first section of filter element membrane shell, water filtered by the first filter element enters the second channel, the axial first end of the filter element shell is provided with the water production outlet, a third channel is further provided between the axial end of the second section of filter element membrane shell and the water production outlet, water filtered by the second filter element enters the third channel, and the second channel and the third channel can discharge the filtered water through the water production outlet after being communicated.

In some embodiments, a communicating pipe is further communicated with one axial end of the second section of filter element membrane shell, one end of the communicating pipe is communicated with the wastewater outlet, the other end of the communicating pipe is communicated with the portion, located on the radial inner side of the second filter element, in the second cavity, so that water which does not enter the second filter element can be discharged through the communicating pipe via the wastewater outlet.

In some embodiments, a first bonding portion is connected to one axial end of the first filter element, and the first bonding portion and the first filter element membrane shell form the second channel in the axial direction.

In some embodiments, the axial one end of second filter core is connected and is provided with the third portion of bonding, the outer periphery cover of third portion of bonding is established second section filter core membrane shell, the interior week of third portion of bonding is worn to establish communicating pipe, process the inside hydroenergy of straining of second filter core can pass through behind the third portion of bonding get into in the third passageway, do not get into the inside hydroenergy of second filter core gets into in the communicating pipe.

In some embodiments, the outer periphery of the filter element shell at the water production outlet is further provided with a first bulge protruding towards the first section of filter element membrane shell, the first section of filter element membrane shell is provided with a second bulge protruding towards the direction of the filter element shell along the axial direction, and the first bulge is connected with the second bulge and a first sealing member is arranged between the first bulge and the second bulge;

the filter element shell is provided with a waste water outlet, the periphery of the waste water outlet faces the second section of filter element membrane shell is protruded to form a third protrusion, the third protrusion forms a sleeve and is sleeved on the periphery of the communicating pipe, and the communicating pipe is provided with a second sealing element between the third protrusion and the communicating pipe.

In some embodiments, the first hollow fiber filtration membrane filaments are hollow fiber nanofiltration membrane filaments or hollow reverse osmosis membrane filaments.

The utility model also provides a water purification system, it includes preceding arbitrary compound filter element group spare.

The utility model provides a pair of compound filter element group spare and water purification system has following beneficial effect:

the utility model discloses a set up first filter core and second part, the second filter core includes second hollow fiber filter membrane silk, the second filter core is located the radial inboard of first filter core, the water that raw water import got into can pass through the filtration of first filter core, and get into the inside of first hollow fiber filter membrane silk and finally derive through the water outlet when filtering, arrange these fiber filter membrane silks together radially, do not have the condition of beating the glue on the diaphragm, and the density of radial packing can also be designed according to specific application, thereby improves effective membrane area; compared with the traditional filter element, the hollow fiber nanofiltration or reverse osmosis technology 1) adopted in the technical scheme has high filtration precision, and compared with the traditional ultrafiltration filter element technology, the technical scheme has good separation effect on divalent and high-valence salts and small molecular organic matters, can improve the filtration precision and reduce scaling risk; 2) the area of the filter element membrane is effectively increased, the hollow fiber nanofiltration or reverse osmosis technology adopted by the technical scheme can effectively utilize space, increase the membrane area and improve the water quality purification effect; 3) the operation pressure is small, the operation cost is low, the hollow fiber nanofiltration technology adopted by the technical scheme is that under the action of pressure difference, salt and small molecular substances permeate the nanofiltration membrane, and the operation pressure is lower than that of a reverse osmosis filter element; 4) convenient installation, the membrane core subassembly of utilizing this technical scheme production, its water inlet, delivery port and dense exhalant outlet are located same end, can realize convenient installation, promote user experience.

Drawings

Figure 1 is a cross-sectional view of the composite filter element assembly of the present invention.

The reference numbers in the figures denote:

100. a raw water inlet; 200. a water production outlet; 300. a waste water outlet; 1. a first filter element; 2. a second filter element; 3. a filter element housing; 4. a first section of filter element membrane shell; 5. a second section of filter element membrane shell; 51. a first stage wastewater outlet; 6. a first channel; 7. a first cavity; 8. a second cavity; 9. a second channel; 10. a third channel; 11. a communicating pipe; 12. a first bonding portion; 16. a third bonding portion; 18. a first seal.

Detailed Description

As shown in fig. 1, the present invention provides a composite filter element assembly, comprising:

the water filter comprises a raw water inlet 100, a water production outlet 200, a wastewater outlet 300, a first filter element 1 and a second filter element 2, wherein the first filter element 1 comprises a first hollow fiber filtering membrane filament, the second filter element 2 comprises a second hollow fiber filtering membrane filament, the second filter element 2 is positioned on the radial inner side of the first filter element 1, water entering from the raw water inlet 100 can be filtered by the first filter element 1, enters the inside of the first hollow fiber filtering membrane filament during filtering and is finally led out through the water production outlet 200, water not entering the inside of the first filter element 1 can be filtered by the second filter element 2, enters the inside of the second hollow fiber filtering membrane filament during filtering and is finally led out through the water production outlet 200, and water not entering the inside of the second filter element 2 can be communicated with and led out from the wastewater outlet 300;

still include filter core shell 3 and bottom end cover 14, produce water export 200 with waste water outlet 300 all sets up the axial first end of filter core shell 3, bottom end cover 14 with the axial second end of filter core shell 3 meets, raw water import 100 for set up in through-hole on the bottom end cover 14 to can be with raw water leading-in extremely the inside of filter core shell 3. Preferably, the bottom end cap 14 is integrally formed with the cartridge housing 3.

The utility model discloses a set up first filter core and second part, the second filter core includes second hollow fiber filter membrane silk, the second filter core is located the radial inboard of first filter core, the water that raw water import got into can pass through first filter core filters to get into when filtering the inside of first hollow fiber filter membrane silk and finally pass through produce the export and derive, the hydroenergy that does not get into the inside of first filter core 1 can pass through second filter core 2 filters, and gets into when filtering the inside of second hollow fiber filter membrane silk and finally lead out through produce water export 200, radially arrange these fibre filter membrane silks together, do not have the condition of beating the glue on the diaphragm, and the density of radially filling also can design according to specific application to improve effective area; compared with the traditional filter element, the hollow fiber nanofiltration or reverse osmosis technology 1) adopted in the technical scheme has high filtration precision, and compared with the traditional ultrafiltration filter element technology, the technical scheme has good separation effect on divalent and high-valence salts and small molecular organic matters, can improve the filtration precision and reduce scaling risk; 2) the area of the filter element membrane is effectively increased, the hollow fiber nanofiltration or reverse osmosis technology adopted by the technical scheme can effectively utilize space, increase the membrane area and improve the water quality purification effect; 3) the operation pressure is small, the operation cost is low, the hollow fiber nanofiltration technology adopted by the technical scheme is that under the action of pressure difference, salt and small molecular substances permeate the nanofiltration membrane, and the operation pressure is lower than that of a reverse osmosis filter element; 4) the filtration that forms one-level two sections can also improve the recycle rate of waste water.

Can't satisfy the problem that filter fineness is high, the running cost is low, produce that flux of water is big, the installation is convenient simultaneously to traditional filter element group spare, the utility model provides a filter fineness is high, produce that flux of water is big filter element group spare technical scheme can effectively solve the problem that the installation is convenient, specifically includes:

1. the traditional ultrafiltration filter core has low filtration precision and is easy to scale;

2. the traditional reverse osmosis filter element has high operation pressure and small effective membrane area;

3. the traditional nanofiltration filter core has low space utilization rate and low water production flux.

The solution to these several problems can improve the flux of produced water, improve the utilization ratio of the membrane surface, improve the water quality purification effect, and avoid the situation of difficult installation.

The utility model discloses two sections filters of one-level (for the RO filter core), improve the rate of recovery, improve the filter fineness and realize through cavity membrane silk, two sections structures of cavity membrane silk + one-level, the problem of solution can also improve the rate of recovery of producing water when improving the precision.

Different from traditional filter element group spare, the utility model provides a hollow fiber who radially arranges is received and is strained or reverse osmosis (is last to hollow fiber filter membrane silk, and it is including receiving and straining with reverse osmosis) two segmentation compound filter element group spares of one-level, and effective membrane area is big, filter fineness is high, product water flux is big, can satisfy the demand that the user purified water quality, can solve the complicated problem of core changing operation simultaneously, improves filter core treatment efficiency. Be different from traditional filter element group spare, the utility model discloses utilize hollow fiber to receive and strain or reverse osmosis membrane silk forms two segmentation filter core structures, improve the membrane face utilization ratio, design water inlet, delivery port and dense water discharge port in same one end, simplified filter core installation operation. The hollow fiber nanofiltration or reverse osmosis is of a hollow filamentous structure, filtered water can enter the hollow interior, and water which cannot enter the hollow interior is concentrated water or waste water containing high impurities.

In some embodiments, still include filter core shell 3, first section filter core membrane shell 4 and second section filter core membrane shell 5, first section filter core membrane shell 4 with second section filter core membrane shell 5 all set up in the filter core shell 3, second section filter core membrane shell 5 set up in the radial inside of first section filter core membrane shell 4, just the inside setting of second section filter core membrane shell 5 the second filter core 2, first filter core 1 is located the periphery of second section filter core membrane shell 5, first section filter core membrane shell 4 is located axial one side of first filter core 1. This is the utility model discloses a composite filter element's preferred structural style, can inject the shell shape through the filter core shell, its inside first section filter core membrane shell and the second section filter core membrane shell of setting up, second section filter core membrane shell is used for injecing the second filter core, first filter core is located the periphery of second section filter core membrane shell, make first filter core and second filter core arrange inside and outside in radial direction, make water filter and see off by producing the water outlet from the first filter core in radial outside, the water that does not get into in the first filter core reachs second filter core department again and filters, form the two-section filtration structural style of one-level, the improvement is to the utilization efficiency and the recovery efficiency of waste water.

In some embodiments, the cartridge housing 3 is a cylindrical structure, the first hollow fiber filtration membrane filaments are in a U-shaped configuration with straight sides extending along the axial direction of the cartridge housing 3, and the second hollow fiber filtration membrane filaments are in a U-shaped configuration with straight sides extending along the axial direction of the cartridge housing 3; the first hollow fiber filtering membrane filaments are multiple and are arranged at intervals along the radial direction and the circumferential direction of the filter element shell 3; the second hollow fiber filtering membrane filaments are a plurality of and are arranged at intervals along the radial direction and the circumferential direction of the filter element shell 3. This is the utility model discloses a filter core shell's preferred structural style, first hollow fiber filtration membrane silk and the second hollow fiber filtration membrane silk that extend along axial direction to and a plurality of interval arrangement's first hollow fiber filtration membrane silk and second hollow fiber filtration membrane silk can effectively increase the area of contact with water in the space direction, improve the membrane area, improve the filter effect.

In some embodiments, a first channel 6 is provided between the first section of the filter element membrane shell 4 and the filter element housing 3, a first cavity 7 is formed between the second section of the filter element membrane shell 5 and the filter element housing 3, the first filter element 1 is located in the first cavity 7, the raw water inlet 100 is communicated with one end of the first channel 6, and the other end of the first channel 6 is communicated with the first cavity 7, so that water can be introduced into the first filter element 1 for filtering. The utility model discloses still can filter the leading-in first filter core department of raw water through first cavity through the first passageway between first section filter core membrane shell and the filter core shell, inside the cavity that the pure water part got into first filter core, what the cavity that fails to get into first filter core was waste water, and it further gets into and filters in the second filter core, improves water use rate.

In some embodiments, the second section of the filter cartridge membrane shell 5 forms a second cavity 8 inside, the second filter cartridge 2 is located in the second cavity 8, at least one first section of waste water outlet 51 is formed on the second section of the filter cartridge membrane shell 5 in a manner of penetrating through the inner wall and the outer wall of the second section of the filter cartridge membrane shell, and water in the first cavity 7 can enter the second cavity 8 through the first section of waste water outlet 51. The utility model discloses still can be with the leading-in and get into the second cavity through first section wastewater outlet of the waste water that filters off among the first filter core through the inside second cavity of second section filter core membrane shell, and then filter in second filter core department, improve the utilization efficiency to waste water.

In some embodiments, a second channel 9 is further provided between one axial end of the first filter element 1 and the first filter element membrane shell 4, water filtered by the first filter element 1 enters the second channel 9, the first axial end of the filter element housing 3 is provided with the water production outlet 200, a third channel 10 is further provided between one axial end of the second filter element membrane shell 5 and the water production outlet 200, water filtered by the second filter element 2 enters the third channel 10, and the second channel 9 and the third channel 10 can discharge filtered water through the water production outlet 200 after being communicated. The utility model discloses still can will get into the leading-in second passageway of the pure water that filters out in the first filter core through the second passageway between first filter core axial one end and the first section filter core membrane shell, and then derive through producing the export, the third passageway between second section filter core membrane shell axial one end and the water outlet of producing can derive the pure water to producing the mouth of a river simultaneously.

In some embodiments, a communication pipe 11 is further provided in an axial end of the second-stage filter element membrane shell 5, one end of the communication pipe 11 is communicated with the wastewater outlet 300, and the other end of the communication pipe is communicated with a portion of the second cavity 8 located at the radial inner side of the second filter element 2, so that water that does not enter the second filter element 2 can be discharged through the communication pipe 11 via the wastewater outlet 300. The utility model discloses still through the waste water export that sets up in the axial first end of filter core shell to and the communicating pipe that sets up on second section filter core membrane shell, can pass through communicating pipe with the waste water in the radial inboard part of second filter core in the second cavity and derive to waste water export, thereby effectively derive the waste water of crossing the filtration.

In some embodiments, a first bonding portion 12 is connected to one axial end of the first filter element 1, and the first bonding portion 12 and the first filter element membrane shell 4 form the second channel 9 in the axial direction. The utility model discloses still set up first bonding portion through the axial one end with first filter core, sealing connection between its and the first section filter core membrane shell is provided with the sealing washer to the realization is to the fixed of the axial one end of first filter core, and first bonding portion can hold water and pass.

In some embodiments, the axial one end of the second filter element 2 is connected and is provided with a third bonding portion 16, the outer periphery of the third bonding portion 16 is sleeved with the second section filter element membrane shell 5, the inner periphery of the third bonding portion 16 penetrates through the communication pipe 11, water filtered out from the inside of the second filter element 2 can enter the third channel 10 after passing through the third bonding portion 16 and does not enter the water inside the second filter element 2 into the communication pipe 11. The utility model discloses the third bonding portion that still sets up through the axial one end of second filter core can fix its axial one end to in wearing to locate the third bonding portion communicating pipe, the inside filtration of second filter core goes out the pure water and can pass and get into the third passageway via third bonding portion, discharges the pure water.

In some embodiments, the outer periphery of the cartridge housing 3 at the water production outlet 200 is further formed with a first protrusion protruding toward the first stage cartridge membrane shell 4, the first stage cartridge membrane shell 4 is formed with a second protrusion protruding toward the cartridge housing 3 along the axial direction, and the first protrusion is connected with the second protrusion with a first sealing member 18 disposed therebetween;

the periphery that lies in on the filter core shell 3 waste water outlet 300 still court second section filter core membrane shell 5 protrusion is formed with the third arch, the third arch forms the sleeve and the cover is located the periphery of communicating pipe 11, and communicating pipe 11 with be provided with the second sealing member between the third arch.

The utility model discloses a first arch and second arch and the first sealing member that set up can prevent the two from mixing to the raw water and produce the firm sealed partition of formation between the water to and the second sealing member between communicating pipe and third arch can be to forming firm sealed effect between waste water and the pure water.

In some embodiments, the first hollow fiber filtration membrane filaments are hollow fiber nanofiltration membrane filaments or hollow reverse osmosis membrane filaments.

The utility model also provides a water purification system, it includes preceding arbitrary compound filter element group spare.

Fig. 1 is a cross-sectional view of a cartridge assembly. As shown in the figure, the filter core assembly comprises a filter core membrane shell, a bottom end cover, a first filter core and a second filter core, wherein the first filter core comprises a first section of filter core membrane shell, a first section of filter core end cover and a first membrane bundle (preferably a first hollow fiber filter membrane filament), the second filter core comprises a second section of filter core membrane shell and a second membrane bundle (preferably a second hollow fiber filter membrane filament), the first membrane bundle and the second membrane bundle are both composed of a plurality of hollow fiber nanofiltration or reverse osmosis membrane filaments, the area ratio of the two membrane filaments is 1.5-2.5: 1, the filter core membrane shell is used for filling the membrane filaments, the first section of filter core membrane shell is used for forming a water production cavity and guiding the water with the first membrane bundle, the first section of filter core end cover is used for fixing the first membrane bundle to form the water production cavity and separating the water production and the wastewater, the second section of filter core membrane shell is used for fixing the second membrane bundle and separating the first section of the water production cavity and the second membrane bundle, the second section of filter core end cover is used for forming the water production cavity and separating the water and the wastewater with the second membrane bundle, the top end cover is used for forming a sealing cavity with the filter element membrane shell, and the filter element end cover (bottom end cover) is used for separating raw water and waste water.

1. The first section of filter element membrane shell is divided into a side surface, a bottom surface and an interface surface, the bottom surface is provided with a plurality of through holes communicated with raw water (namely a first section of raw water inlet), the interface surface of the first section of filter element membrane shell is used for fixing a first membrane bundle and forming a water production cavity, a groove is reserved on the outer side of the interface surface of the first section of filter element membrane shell, a sealing ring is sleeved during installation, isolation of waste water and produced water is facilitated, and water production purity is guaranteed.

2. The bottom end (the top end of the filter element) of the first membrane bundle is a water production end face, all hollow fiber nanofiltration or reverse osmosis membrane filaments of the first membrane bundle are U-shaped, and the bent end does not need to be poured by adopting the U-shaped structure, so that the effective membrane area is increased; all membrane filaments are bent into a U shape, the head ends and the tail ends of the membrane filaments are positioned on the interface surface of the first section of the filter element membrane shell and are poured into membrane filament bundles by using hard glue, and membrane holes are reserved on the end surfaces of the hard glue and used for producing water and yielding water. The pouring layer can be poured by epoxy resin, so that the membrane filaments are more uniformly distributed, the epoxy resin has good adhesion and high bonding strength, and can bear higher pressure.

3. The first section of filter element end cover is divided into a first section of filter element membrane shell contact surface and a second section of filter element membrane shell contact surface and is used for separating first section wastewater and first section produced water.

The second cartridge is assembled as follows:

1. the second section of filter element membrane shell is divided into a side surface, a bottom surface, a central surface and an interface surface, the side surface membrane shell is used for separating raw water, a certain number of through holes are arranged on the side surface membrane shell, and the number and the specification of the through holes can be designed according to specific filter element components; the hole is communicated with the second section of filter element, and the concentrated water generated by the first filter element is used as the raw water of the second filter element, so that the first section of concentrated water outlet is also called as a second section of raw water inlet; the pore size and the pore size can be designed according to the needs, the larger the pore size is, the more the pore size is, the larger the concentrate flow of the first section of filter element is, and the larger the water inlet flow of the second section of filter element is; the smaller the pore diameter is, the less the pore volume is, the smaller the concentrate flow of the first section of filter element is, and the smaller the inlet water flow of the second section of filter element is. The central surface is a waste water channel used for the waste water flow of the second section of filter element.

2. The bottom end (the top end of the filter element) of the second membrane bundle is a water production end face, all hollow fiber nanofiltration or reverse osmosis membrane filaments of the second membrane bundle are U-shaped, and the bent end does not need to be poured by adopting the U-shaped structure, so that the effective membrane area is increased; all membrane filaments are bent into a U shape, the head ends and the tail ends of the membrane filaments are positioned on the interface surface of the first section of the filter element membrane shell and are poured into membrane filament bundles by using hard glue, and membrane holes are reserved on the end surfaces of the hard glue and used for producing water and yielding water. The pouring layer can be poured by epoxy resin, so that the membrane wires are more uniformly distributed, the epoxy resin has good adhesion and high bonding strength, and can bear higher pressure.

3. The second section of filter element end cover is divided into a contact surface with a second membrane bundle glue layer, a contact surface with a second section of filter element membrane shell and a flow guide interface, and a water production cavity is formed at the contact surface of the second section of filter element end cover and the second membrane bundle glue layer and separates water production from first section wastewater; a groove is reserved on the outer side of the flow guide interface surface, and a sealing ring is sleeved in the installation process, so that the isolation of waste water and produced water is facilitated, and the purity of the produced water is ensured.

After the first filter element and the second filter element are assembled respectively, the first section of filter element end cover and the second section of filter element membrane shell are assembled together, and the joint of the first section of filter element membrane shell and the second section of filter element membrane shell is sealed by gluing, so that raw water can not permeate into the second filter element.

The filter element end cover is divided into a raw water contact surface, a second section wastewater contact surface and a flow guide interface, and the filter element end cover and the second section wastewater contact surface form a wastewater cavity, separate the raw water from the second section wastewater and guide the second section wastewater; a groove is reserved on the outer side of the flow guide interface surface, and a sealing ring is sleeved in the installation process, so that the isolation of raw water and waste water is facilitated, and the purity of the raw water which is not polluted by the waste water is ensured.

The equipment back is accomplished to above inner assembly, with the whole filter core membrane shell that inserts of inner assembly, filter core membrane shell is integrated into one piece formula casing, and the three opening that the concentric circle formula was arranged is designed at bottom center, from inside to outside in proper order for producing water delivery port, waste water outlet, raw water inlet.

The top end cover forms a sealed cavity with the filter element membrane shell through spin-melt sealing or spiral sealing, and the sealing performance of the filter element assembly is guaranteed.

The hollow fiber nanofiltration or reverse osmosis primary two-stage composite filter element operation water path comprises:

raw water enters the filter element through a raw water inlet at the bottom of the filter element, enters the first filter element through a first section raw water outlet arranged on a first section filter element membrane shell, membrane filaments filter the raw water by using pressure difference, and produced water flows into a water production cavity formed by a first section filter element end cover and a first section pure water outlet glue layer through a first membrane bundle bottom opening and then flows out from a bottom produced water outlet through a channel formed in the center of a second section filter element membrane shell; the waste water generated by the first section of filter element is used as raw water of a second section of filter element, the raw water enters the second filter element through an upper water inlet of a second section of filter element membrane shell, the membrane filaments purify the water quality by using pressure difference, and the produced water enters a water production cavity formed by a second section of filter element end cover and a second section of pure water outlet glue layer through a bottom opening of a second membrane bundle and then flows out through a water production water outlet; and the wastewater is discharged from a wastewater outlet at the top of the filter element membrane shell through the diversion of the filter element end cover through a second section concentrated water outlet of the second section filter element membrane shell.

A hollow fiber nanofiltration or reverse osmosis one-stage two-section type composite filter element flushing waterway:

raw water enters the filter element through the raw water inlet, enters the first filter element through the first section raw water outlet arranged on the first section filter element membrane shell, and washes the surface of the membrane wire by utilizing water flow, the washing water flow of the first filter element enters the second filter element through the first section concentrated water outlet on the first section filter element membrane shell, and continuously washes the surface of the membrane wire, and finally the washing water is discharged through the waste water outlet at the top of the filter element membrane shell.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims (12)

1. A composite filter element assembly, comprising: the method comprises the following steps:

a raw water inlet (100), a produced water outlet (200), a waste water outlet (300), a first filter element (1) and a second filter element (2), the first filter element (1) comprises a first hollow fiber filtering membrane wire, the second filter element (2) comprises a second hollow fiber filtering membrane wire, the second filter element (2) is positioned at the radial inner side of the first filter element (1), water entering from the raw water inlet (100) can be filtered by the first filter element (1), and enters the inside of the first hollow fiber filtering membrane wire during filtering and is finally led out through the water production outlet (200), water which does not enter the inside of the first filter element (1) can be filtered through the second filter element (2), and enters the inside of the second hollow fiber filtering membrane yarn during filtering and is finally led out through the water production outlet (200), and water which does not enter the inside of the second filter element (2) can be communicated with the wastewater outlet (300) and is led out;

still include filter core shell (3) and bottom end cover (14), produce water export (200) with waste water outlet (300) all set up the axial first end of filter core shell (3), bottom end cover (14) with the axial second end of filter core shell (3) meets, raw water import (100) be for set up in through-hole on bottom end cover (14) to can be with raw water leading-in extremely the inside of filter core shell (3).

2. The composite filter element assembly of claim 1, wherein:

still include filter core shell (3), first section filter core membrane shell (4) and second section filter core membrane shell (5), first section filter core membrane shell (4) with second section filter core membrane shell (5) all set up in filter core shell (3), second section filter core membrane shell (5) set up in the radial inside of first section filter core membrane shell (4), just the inside of second section filter core membrane shell (5) sets up second filter core (2), first filter core (1) is located the periphery of second section filter core membrane shell (5), first section filter core membrane shell (4) are located axial one side of first filter core (1).

3. The composite filter element assembly of claim 2, wherein:

the filter element shell (3) is of a cylindrical structure, the first hollow fiber filtering membrane wire is of a U-shaped structure, the straight edge of the first hollow fiber filtering membrane wire extends along the axial direction of the filter element shell (3), the second hollow fiber filtering membrane wire is of a U-shaped structure, and the straight edge of the second hollow fiber filtering membrane wire extends along the axial direction of the filter element shell (3); the first hollow fiber filtering membrane filaments are multiple and are arranged at intervals along the radial direction and the circumferential direction of the filter element shell (3); the second hollow fiber filtering membrane filaments are multiple and are arranged at intervals along the radial direction and the circumferential direction of the filter element shell (3).

4. The composite filter element assembly of claim 2, wherein:

first section filter core membrane shell (4) with first passageway (6) have between filter core shell (3), second section filter core membrane shell (5) with form between filter core shell (3) into first cavity (7), first filter core (1) is located in first cavity (7), raw water import (100) with the one end intercommunication of first passageway (6), the other end of first passageway (6) with first cavity (7) intercommunication is with can leading-in water first filter core (1) department filters.

5. The composite filter element assembly of claim 4, wherein:

the inside of second section filter core membrane shell (5) forms second cavity (8), second filter core (2) are located in second cavity (8), be formed with at least one first section waste water export (51) with the mode that runs through its inner and outer wall on second section filter core membrane shell (5), water in first cavity (7) can pass through first section waste water export (51) get into in second cavity (8).

6. The composite filter element assembly of claim 5, wherein:

the water purifier is characterized in that a second channel (9) is further arranged between one axial end of the first filter element (1) and the first section of filter element membrane shell (4), water filtered by the first filter element (1) enters the second channel (9), the first axial end of the filter element shell (3) is provided with the water production outlet (200), a third channel (10) is further arranged between one axial end of the second section of filter element membrane shell (5) and the water production outlet (200), water filtered by the second filter element (2) enters the third channel (10), and the second channel (9) and the third channel (10) are communicated and then can discharge the filtered water through the water production outlet (200).

7. The composite filter element assembly of claim 6, wherein:

the axial one end of second section filter core membrane shell (5) is served and still is fed through and is provided with communicating pipe (11), the one end of communicating pipe (11) with waste water outlet (300) intercommunication, the other end with lie in second cavity (8) in the part intercommunication of the radial inboard of second filter core (2), can make not get into the inside water of second filter core (2) passes through communicating pipe (11) via waste water outlet (300) are discharged.

8. The composite filter element assembly of claim 7, wherein:

the axial one end of first filter core (1) is connected and is provided with first portion of bonding (12), first portion of bonding (12) with first section filter core membrane shell (4) form on the axial direction second passageway (9).

9. The composite filter element assembly according to any one of claims 7-8, wherein:

the axial one end of second filter core (2) is connected and is provided with third portion of bonding (16), the periphery cover of third portion of bonding (16) is established second section filter core membrane shell (5), wear to establish in the interior week of third portion of bonding (16) communicating pipe (11), process the inside hydroenergy that filters out of second filter core (2) can pass through enter behind third portion of bonding (16) in third passageway (10), do not get into the inside water of second filter core (2) gets into in communicating pipe (11).

10. The composite filter element assembly of claim 7, wherein:

a first bulge is formed on the periphery of the filter element shell (3) positioned at the water production outlet (200) and protrudes towards the first section of filter element membrane shell (4), a second bulge protrudes towards the filter element shell (3) along the axial direction on the first section of filter element membrane shell (4), the first bulge is connected with the second bulge, and a first sealing element (18) is arranged between the first bulge and the second bulge;

the periphery that lies in on filter core shell (3) waste water outlet (300) still court second section filter core membrane shell (5) protrusion is formed with the third arch, the third arch forms the sleeve and the cover is located the periphery of communicating pipe (11), and communicating pipe (11) with be provided with the second sealing member between the third arch.

11. The composite filter element assembly of claim 1, wherein:

the first hollow fiber filtration membrane filaments are hollow fiber nanofiltration membrane filaments or hollow reverse osmosis membrane filaments.

12. A water purification system, its characterized in that: comprising the composite filter element assembly of any of claims 1-11.

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